National Library of Energy BETA

Sample records for offset slow growth

  1. Fracture mechanics analysis of slow crack growth in polyethylene 

    E-Print Network [OSTI]

    Self, Robert Alan

    1997-01-01

    Slow crack growth in polyethylene is often the limiting factor in long-term service of plastic pipe or other structural applications. A new test method and analysis method was developed to study slow crack growth in polyethylene. Two high density...

  2. Normal and slow growth states of microbial populations in essential resource-based chemostat

    E-Print Network [OSTI]

    Wang, Yi

    Normal and slow growth states of microbial populations in essential resource-based chemostat Yi Wang a Department of Mathematics University of Science and Technology of China Hefei, Anhui, 230026, P. China Abstract To mimic the striking capability of microbial culture for growth adap- tation after

  3. Creation of Peanut-Shaped Bulges via the Slow Mode of Bar Growth

    E-Print Network [OSTI]

    Petersen, Michael S; Katz, Neal

    2013-01-01

    Recent theoretical work has implicated fast bar formation modes and subsequent evolution as the creation mechanism for the observed peanut-shaped bulges in some edge-on disk galaxies. We demonstrate an N-body simulation of a disk undergoing a contrasting slow mode of bar growth, unsubjected to a buckling instability, which nonetheless grows the 4:1 orbit family responsible for a peanut-shaped bulge. We also present a simulation with fast mode bar growth, which exhibits thickening similar to other work. A novel orbit classification method that finds dynamically distinct families is presented, allowing for a detailed analysis of angular momentum transfer channels within the disk.

  4. Berberine slows cell growth in autosomal dominant polycystic kidney disease cells

    SciTech Connect (OSTI)

    Bonon, Anna; Mangolini, Alessandra [Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, 44121 Ferrara (Italy)] [Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, 44121 Ferrara (Italy); Pinton, Paolo [Department of Morphology, Surgery and Experimental Medicine, Section of General Pathology, University of Ferrara, 44121 Ferrara (Italy)] [Department of Morphology, Surgery and Experimental Medicine, Section of General Pathology, University of Ferrara, 44121 Ferrara (Italy); Senno, Laura del [Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, 44121 Ferrara (Italy)] [Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, 44121 Ferrara (Italy); Aguiari, Gianluca, E-mail: dsn@unife.it [Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, 44121 Ferrara (Italy)] [Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, 44121 Ferrara (Italy)

    2013-11-22

    Highlights: •Berberine at appropriate doses slows cell proliferation in ADPKD cystic cells. •Reduction of cell growth by berberine occurs by inhibition of ERK and p70-S6 kinase. •Higher doses of berberine cause an overall cytotoxic effect. •Berberine overdose induces apoptotic bodies formation and DNA fragmentation. •Antiproliferative properties of this drug make it a new candidate for ADPKD therapy. -- Abstract: Autosomal dominant polycystic kidney disease (ADPKD) is the most common hereditary monogenic disorder characterized by development and enlargement of kidney cysts that lead to loss of renal function. It is caused by mutations in two genes (PKD1 and PKD2) encoding for polycystin-1 and polycystin-2 proteins which regulate different signals including cAMP, mTOR and EGFR pathways. Abnormal activation of these signals following PC1 or PC2 loss of function causes an increased cell proliferation which is a typical hallmark of this disease. Despite the promising findings obtained in animal models with targeted inhibitors able to reduce cystic cell growth, currently, no specific approved therapy for ADPKD is available. Therefore, the research of new more effective molecules could be crucial for the treatment of this severe pathology. In this regard, we have studied the effect of berberine, an isoquinoline quaternary alkaloid, on cell proliferation and apoptosis in human and mouse ADPKD cystic cell lines. Berberine treatment slows cell proliferation of ADPKD cystic cells in a dose-dependent manner and at high doses (100 ?g/mL) it induces cell death in cystic cells as well as in normal kidney tubule cells. However, at 10 ?g/mL, berberine reduces cell growth in ADPKD cystic cells only enhancing G{sub 0}/G{sub 1} phase of cell cycle and inhibiting ERK and p70-S6 kinases. Our results indicate that berberine shows a selected antiproliferative activity in cellular models for ADPKD, suggesting that this molecule and similar natural compounds could open new opportunities for the therapy of ADPKD patients.

  5. Fast and slow crystal growth kinetics in glass-forming melts

    SciTech Connect (OSTI)

    Orava, J.; Greer, A. L., E-mail: alg13@cam.ac.uk [WPI-Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan and Department of Materials Science and Metallurgy, 27 Charles Babbage Road, University of Cambridge, Cambridge CB3 0FS (United Kingdom)

    2014-06-07

    Published values of crystal growth rates are compared for supercooled glass-forming liquids undergoing congruent freezing at a planar crystal-liquid interface. For the purposes of comparison pure metals are considered to be glass-forming systems, using data from molecular-dynamics simulations. For each system, the growth rate has a maximum value U{sub max} at a temperature T{sub max} that lies between the glass-transition temperature T{sub g} and the melting temperature T{sub m}. A classification is suggested, based on the lability (specifically, the propensity for fast crystallization), of the liquid. High-lability systems show “fast” growth characterized by a high U{sub max}, a low T{sub max}?/?T{sub m}, and a very broad peak in U vs. T?/?T{sub m}. In contrast, systems showing “slowgrowth have a low U{sub max}, a high T{sub max}?/?T{sub m}, and a sharp peak in U vs. T?/?T{sub m}. Despite the difference of more than 11 orders of magnitude in U{sub max} seen in pure metals and in silica, the range of glass-forming systems surveyed fit into a common pattern in which the lability increases with lower reduced glass-transition temperature (T{sub g}?/?T{sub m}) and higher fragility of the liquid. A single parameter, a linear combination of T{sub g}?/?T{sub m} and fragility, can show a good correlation with U{sub max}. For all the systems, growth at U{sub max} is coupled to the atomic/molecular mobility in the liquid. It is found that, across the diversity of glass-forming systems, T{sub max}?/?T{sub g} = 1.48 ± 0.15.

  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. Insulin-like Growth Factor-I and Slow, Bi-directional Perfusion Enhance the Formation of Tissue-Engineered Cardiac Grafts

    E-Print Network [OSTI]

    Cheng, Mingyu

    Biochemical and mechanical signals enabling cardiac regeneration can be elucidated using in vitro tissue-engineering models. We hypothesized that insulin-like growth factor-I (IGF) and slow, bi-directional perfusion could ...

  8. Shaped Offset QPSK Capacity

    E-Print Network [OSTI]

    Sahin, Cenk

    2012-08-31

    In this work we compute the capacities and the pragmatic capacities of military-standard shaped-offset quadrature phase-shift keying (SOQPSK-MIL) and aeronautical telemetry SOQPSK (SOQPSK-TG). In the pragmatic approach, SOQPSK is treated as a...

  9. DEMONSTRATING SLOW GROWTH RATES IN OPAL FROM Y.M.,NV, USING MICRODIGESTION AND ION-PROBE URANIUM-SERIES DATING

    SciTech Connect (OSTI)

    J. PACES; L. NEYMARK; H. PERSING; J. WOODEN

    2000-07-25

    Thinly laminated (<0.01 mm) opal sheets and globules associated with calcite in fractures and cavities in the unsaturated zone at Yucca Mountain, Nevada, have U concentrations of 50 to 300 ppm. Previous uranium-series thermal ionization mass spectrometry (TIMS) analyses of 0.2- to 1-mm-thick subsamples resulted in a model of slow mineral growth at rates of 0.5 to 5 mm/m.y. To test this growth model using finer sampling resolution, in situ microdigestions were performed by applying a drop of hydrofluoric acid directly to opal surfaces within a small area encircled by jeweler's wax. After several minutes, the liquid was removed, spiked with a tracer solution, and analyzed by TIMS for both U and Th using a single rhenium filament with colloidal graphite. Solutions contained about 0.5 nanograms of U, equivalent to opal weights of 1 to 10 micrograms and dissolved-layer thicknesses less than 0.003 mm. Microdigested opal surfaces have Th-230/U ages of 5 to 10 thousand years (ka) in contrast to much older ages of 150 to 250 ka obtained previously from whole-globule digestions. Additional tests of the growth model were made on cross sections of identical opal globules using the sensitive high-resolution ion microprobe (SHRIMP) with a 0.04-mm-diameter O-minus primary beam. Counting rates for Tho-246 and U-234 varied between 5 and 70 counts per second with Th-230/Th-232 activity ratios typically much greater than a million. The Th-230/U ages in the outer 0.3 mm of the globules ranged from about 30 ka at the outer edge to 400 ka at depth. Ages correlate with microstratigraphic depths and indicate average growth rates between 0.5 and 0.7 mm/m.y. Current U-series data do not resolve differential growth rates related to climate changes during this time period. However, both microdigestion and SHRIMP results confirm the previous TIMS-based model of slow, uniform rates of mineral growth in a hydrologically stable environment.

  10. CARBON OFFSETTING IN A TOURSIM CONTEXT: WHISTLER BC

    E-Print Network [OSTI]

    CARBON OFFSETTING IN A TOURSIM CONTEXT: WHISTLER BC by Katie von Gaza Bachelor of Environmental: Carbon offsetting in a Tourism Context: Whistler, BC. Project No.: 471 Examining Committee: Chair 2.2 Carbon Offsetting

  11. Financing Residential Energy Efficiency with Carbon Offsets Transcript...

    Energy Savers [EERE]

    Financing Residential Energy Efficiency with Carbon Offsets Transcript Financing Residential Energy Efficiency with Carbon Offsets Transcript This document contains the transcript...

  12. Carbon Offsets for Forestry and Bioenergy: Researching Opportunities...

    Open Energy Info (EERE)

    study in Uganda and India looking at the opportunities that carbon offset projects offer for poor rural communities." References "Carbon Offsets for Forestry and...

  13. SLOW SAND FILTRATIONSLOW SAND FILTRATION

    E-Print Network [OSTI]

    SLOW SAND FILTRATIONSLOW SAND FILTRATION:: Timeless Technology and Recent AdvancesBiological Filtration Systems ­­ Riverbank FiltrationRiverbank Filtration ­­ Slow Sand FiltrationSlow Sand Filtration #12;Slow Sand Filtration (SSF)Slow Sand Filtration (SSF) Headspace Supernatant Water Schmutzdecke Raw

  14. Carbon offsets, the CDM, and sustainable development

    E-Print Network [OSTI]

    for research on post-2012 climate policy at the British Tyndall Centre for Climate Change, and chairsChapter 11 Carbon offsets, the CDM, and sustainable development Diana M. Liverman Diana M. Liverman of the ESSP. Her research has focused on the human dimensions of global environmental change, especially

  15. Slow light with flat or offset band edges in few-mode fiber with two gratings

    E-Print Network [OSTI]

    , C. J. Handmer2, C. Martijn de Sterke2 and M. J. Steel3 1 ARC Center of Excellence for Ultrahigh waveguides with dual Bragg gratings," Electron. Lett. 38, 1049­1051 (2002). 10. T. Erdogan and J. E. Sipe, "Tilted fiber phase gratings," J. Opt. Soc. Am. A 13, 296­313 (1996). 11. S. K. Case, "Coupled-wave theory

  16. Random Offset Curves and Surfaces with Controllable Noise (Extended Abstract)

    E-Print Network [OSTI]

    Lee, In-Kwon

    similar complex patterns often being able to be defined with the gradient noise functions. PORN is defined by replacing a static offset distance in a general offset with a gradient noise function. For example, PORN

  17. Seismic Amplitude Versus Offset (AVO) Character of Geopressured Transition Zones

    E-Print Network [OSTI]

    on well logs from sealed transitions n demonstrate their unusual AVO character. A long-offset COCORP

  18. The past and future of greenhouse gas offset projects

    SciTech Connect (OSTI)

    Trexler, M.C.; Kosloff, L.H. [Trexler and Associates, Inc., Portland, OR (United States)

    1997-12-31

    Researchers now have almost 10 years of experience with on-the-ground carbon offset projects for climate change mitigation purposes. The field is evolving from one driven primarily by public and governmental relations, to one driven by companies` perceived need to adapt to anticipated national and international regulation of greenhouse gas emissions. Offset project participants are seeking to identify offset opportunities, come up the regulatory and technical learning curves, and identify new market opportunities. Offset projects being implemented today can be evaluated through several lenses including offset performance and benefit quantification, cost-effectiveness, and political and environmental acceptability. Careful evaluation of existing offset experience is important in order to guide national and international policy development. This paper will review the history and trends of offset project development, use existing experience to identify advantages and disadvantages associated with different offsets, and identify lessons that can guide future project development. The lead author carried out the CO{sub 2} benefit analysis for the first offset project (AES Corp.`s CARE Guatemala reforestation project), and has developed and evaluated dozens of domestic and international offset projects and proposals. The authors` company is currently implementing more than a half-dozen offset projects and they are intimately involved in ongoing technical and policy development of the field.

  19. Maryland's efforts to develop regulations creating an air emissions offset trading program

    SciTech Connect (OSTI)

    Guy, D.M.; Zaw-Mon, M.

    1999-07-01

    Under the federal Clean Air Act's New Source Review program, many companies located in or planning to locate in areas that do not meet federal air quality standards or in the Northeast Ozone Transport Region (northern Virginia to Maine) must obtain emission reductions (called offsets) of volatile organic compounds and nitrogen oxides that are greater than the new emissions that will be released. This offset requirement allows growth in industry while protecting air quality against deterioration. Despite the federal offset requirement, a formal banking and trading program is not mandated by the Clean Air Act Amendments of 1990. Still, a mechanism is needed to ensure that emission reduction credits (ERCs) are available for sources to use to meet the offset requirement. Currently, Maryland does not have regulations covering the sale or transfer of ERCs from one facility to another. Maryland works with industry on a case-by-case basis to identify potential sources of ERCs and to assist in obtaining them. Then, the offset requirement and the ERCs used to meet the offsets are incorporated into individual permits using various permitting mechanisms. Desiring certainty and stability in the banking and trading process, Maryland's business community has pressed for regulations to formalize Maryland's procedures. Working over several years through a stakeholder process, Maryland has developed concepts for a trading program and a draft regulation. This paper describes Maryland's current case-by-case banking and trading procedure and traces efforts to develop a regulation to formalize the process. The paper discusses complex policy issues related to establishing a banking and trading program, describes the principal elements of Maryland's draft regulation, and summarizes elements of other states' emissions banking and trading programs.

  20. Divergence and Lifecycle Offsets in Product Families with Commonality

    E-Print Network [OSTI]

    de Weck, Olivier L.

    of seven complex product families that span the aerospace, automotive, semiconductor capital equipment: commonality; platform strategy; platform management; product development; divergence; lifecycle offsets 1

  1. FLOATING GATE COMPARATOR WITH AUTOMATIC OFFSET MANIPULATION FUNCTIONALITY

    E-Print Network [OSTI]

    Maryland at College Park, University of

    a desired offset. We exploit the nega- tive feedback functionality of pFET hot-electron injection to achieve to this circuit node, so charge on this gate remains trapped for a very long time. In our comparator, the circuit offset is stored in this high-retention charge form, and altered by means of injection and tunneling

  2. Report of the Offset Drilling Workshop Ocean Drilling Program

    E-Print Network [OSTI]

    Report of the Offset Drilling Workshop held at Ocean Drilling Program Texas A&M University College Need for an Engineering Leg 35 Realistic Strategies for Offset Drilling 37 Appendix 1 Workshop (Leg 153) 21 Figure 4 "Rig Floor Perception" of Generic Boreholes Drilled During Leg 153 22 Figure 5

  3. EXPLAINING THE PRICE OF VOLUNTARY CARBON OFFSETS MARC N. CONTE

    E-Print Network [OSTI]

    Kotchen, Matthew J.

    EXPLAINING THE PRICE OF VOLUNTARY CARBON OFFSETS MARC N. CONTE Stanford University, Stanford, CA matthew.kotchen@yale.edu This paper identifies factors that explain the large variability in the price of voluntary carbon offsets. We estimate hedonic price functions using a variety of provider- and project

  4. Azimuthal Offset-Dependent Attributes (AVO And FVO) Applied To Fracture Detection

    E-Print Network [OSTI]

    Shen, Feng

    1999-01-01

    Using the amplitude versus offset (AVO) and the frequency versus offset (FVO) information, the diagnostic ability of P-wave seismic data in fracture detection is investigated. The offset-dependent attributes (AVO and FVO) ...

  5. Economic Analysis of Voluntary Carbon Offset Market and Bioenergy Policies 

    E-Print Network [OSTI]

    Shiva, Layla

    2014-08-27

    This work studies the economic implications of some United States greenhouse gas mitigation related policies. The main items focused on in this work are: 1) possible agricultural entry into a voluntary carbon offset market, 2) use of marginal land...

  6. Sequestration Offsets versus Direct Emission Reductions: Consideration of Environmental Externalities

    E-Print Network [OSTI]

    McCarl, Bruce A.

    support for allocating resources to alter the market mix of carbon sequestration and direct emission carbon sequestration practices also influence the environment by for example reducing erosion1 Sequestration Offsets versus Direct Emission Reductions: Consideration of Environmental

  7. Missouri: EERE Funds Help Offset City Electricity Expenses |...

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

    utility company Ameren Missouri for a total of 181,000, the city installed more than 200 solar panels on the roof of the Pointe to offset costly annual electricity expenses of...

  8. Gas Slow Control System Specifications

    E-Print Network [OSTI]

    Roma "La Sapienza", Università di

    AMS-02 TRD Gas Slow Control System Specifications v 4.2 26-06-2006 A. Bartoloni, B. Borgia, F. Bucci, F. R. Spada INFN Sezione di Roma 1- Roma, Italy #12;2/45 #12;3/45 1. ABSTRACT 5 2. GAS SYSTEM FUNCTIONAL DESCRIPTION 5 3. GAS CONTROL SYSTEM 8 4. CONTROL SYSTEM COMPONENTS 12 a. Universal Control System

  9. Beyond Additionality in Cap-and-Trade Offset Policy Reuters/Nguyen Huy Kham

    E-Print Network [OSTI]

    the cap. Offsets have assumed an important role in many recent emissions trading programs for greenhouse

  10. Slow-roll freezing quintessence

    E-Print Network [OSTI]

    Sourish Dutta; Robert J. Scherrer

    2011-08-03

    We examine the evolution of quintessence models with potentials satisfying (V'/V)^2freezing phase, in which the equation of state parameter w decreases with time, followed by slow thawing evolution, for which w increases with time. These models resemble constant-V models at early times but diverge at late times. Our analytic approximation gives results in excellent agreement with exact numerical evolution.

  11. POTENTIAL MEXICAN OFFSETS TO Business Council for Sustainable Development Mexico

    E-Print Network [OSTI]

    California at Davis, University of

    POTENTIAL MEXICAN OFFSETS TO CALIFORNIA Business Council for Sustainable Development ­ Mexico Companies ALFA Altos Hornos de Mexico Bachoco CEMEX Cuprum DeAcero FEMSA GCC Grupo Bimbo Grupo Syngenta Acciona Energía 2 #12;Basic Facts on the California ­ Mexico Relationship 3 · Major trade partner

  12. Harvesting the Greenhouse: Comparing Biological Sequestration with Emissions Offsets

    E-Print Network [OSTI]

    McCarl, Bruce A.

    C. Murray Environmental and Natural Resource Economics Program Research Triangle Institute Research (e.g. increasing fuel use efficiency or switching fuels). Sequestration offsets involve the capture GHGs, then injecting the carbon into soils, aquifers, oceans or geological formations for permanent

  13. A computing strategyfor applicationsinvolving offsets,sweeps,and Minkowski operations

    E-Print Network [OSTI]

    Suresh, Krishnan

    .E.Hartquista,J.P.Menonb,K. Sureshc,H.B. Voe1ckera.*,1.Zagajacd "The Sibley School of Mechanical and Aero Engineering, Cornell,Ford Motor Company, Dearborn, MI, USA Received 29 June 1998; accepted 24 September 1998 Abstract Offsets

  14. Cosmogenic 10 Cl geochronology of offset alluvial fans

    E-Print Network [OSTI]

    Frankel, Kurt L.

    Cosmogenic 10 Be and 36 Cl geochronology of offset alluvial fans along the northern Death Valley the first geochronologically determined slip rate for the NDVFZ. Our study focuses on the Red Wall Canyon Pleistocene. In situ terrestrial cosmogenic 10 Be and 36 Cl geochronology was used to date the Red Wall Canyon

  15. Slow light microfluidics: a proposal

    E-Print Network [OSTI]

    Sumetsky, M

    2014-01-01

    The resonant slow light structures created along a thin-walled optical capillary by nanoscale deformation of its surface can perform comprehensive simultaneous detection and manipulation of microfluidic components. This concept is illustrated with a model of a 0.5 millimeter long 5 nm high triangular bottle resonator created at a 50 micron radius silica capillary containing floating microparticles. The developed theory shows that the microparticle positions can be determined from the bottle resonator spectrum. In addition, the microparticles can be driven and simultaneously positioned at predetermined locations by the localized electromagnetic field created by the optimized superposition of eigenstates of this resonator, thus, exhibiting a multicomponent near field optical tweezers.

  16. Fast Offset Compensation for a 10Gbps Limit Ethan A. Crain

    E-Print Network [OSTI]

    Perrott, Michael

    Fast Offset Compensation for a 10Gbps Limit Amplifier by Ethan A. Crain Bachelor of Science Students #12;2 #12;Fast Offset Compensation for a 10Gbps Limit Amplifier by Ethan A. Crain Submitted

  17. First principles investigation of scaling trends of zirconium silicate interface band offsets

    E-Print Network [OSTI]

    Dutton, Robert W.

    First principles investigation of scaling trends of zirconium silicate interface band offsets out to investigate the scaling trends of band offsets at model silicon/zirconium silicate interfaces. Owing to the d character of zirconium silicate conduction bands, the band gap and band offset are shown

  18. Slow growth rates of Amazonian trees: Consequences for carbon cycling

    E-Print Network [OSTI]

    2005-01-01

    m, and Centro de Energia Nuclear na Agricultura?UniversidadIsoto´pica, Centro de Energia Nuclear na Agricultura, P.O.

  19. Slow Dynamics of Orbital Domains in Manganite

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

    characterized by the competition between a pinned orbital domain topology that remains static and mobile domain boundaries that exhibit slow, temporal fluctuations. Speckles in...

  20. Material slow light and structural slow light: similarities and differences for nonlinear optics [Invited

    E-Print Network [OSTI]

    Boyd, Robert W.

    Material slow light and structural slow light: similarities and differences for nonlinear optics There are two standard methods for controlling the group velocity of light. One makes use of the dispersive nonlinear optical processes are enhanced through use of slow-light interactions and when they are not

  1. Slow technology for well-being Steffi Beckhaus

    E-Print Network [OSTI]

    Beckhaus, Steffi

    Slow technology for well-being Steffi Beckhaus IAD - Technical University of Darmstadt interactiondesign@steffi.beckhaus.de ABSTRACT Slow technology is technology that actively influences our well): Miscellaneous General Terms Slow Technology SLOW TECHNOLOGY IS... Slow technology is technology that actively

  2. Slow motion responses of compliant offshore structures 

    E-Print Network [OSTI]

    Cao, Peimin

    1996-01-01

    An efficient method is developed to predict slow motion responses of slender compliant offshore structures in the unidirectional irregular waves and currents. The environmental loads are computed using the modified Morison equation based on slender...

  3. Lead Slowing Down Spectrometry Analysis of Data from Measurements...

    Office of Scientific and Technical Information (OSTI)

    Lead Slowing Down Spectrometry Analysis of Data from Measurements on Nuclear Fuel Citation Details In-Document Search Title: Lead Slowing Down Spectrometry Analysis of Data from...

  4. Valuation of carbon capture and sequestration under Greenhouse gas regulations: CCS as an offsetting activity

    SciTech Connect (OSTI)

    Lokey, Elizabeth

    2009-08-15

    When carbon capture and sequestration is conducted by entities that are not regulated, it could be counted as an offset that is fungible in the market or sold to a voluntary market. This paper addresses the complications that arise in accounting for carbon capture and sequestration as an offset, and methodologies that exist for accounting for CCS in voluntary and compliance markets. (author)

  5. An enhanced model for calculating delay as a function of offset 

    E-Print Network [OSTI]

    Jain, Shweta

    1996-01-01

    This thesis presents the enhancements made to an existing model for calculating delay as a function of offset between the traffic signals of a link. The delay-difference-of offset technique is a signal control concept used for strategic optimization...

  6. Slow Dynamics of Orbital Domains in Manganite

    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-effect Photovoltaics -7541 *Impact Neutron diffractionSlideshow: InnovationSlowSlow

  7. Slow Dynamics of Orbital Domains in Manganite

    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 RoomPreservation ofAlbuquerque|Sensitive Species3performed Steven D. Pain OakEnergySlowSlow

  8. Carbon offsets as a cost containment instrument : a case study of reducing emissions from deforestation and forest degradation

    E-Print Network [OSTI]

    Kim, Jieun, S.M. Massachusetts Institute of Technology

    2010-01-01

    Carbon offset is one type of flexibility mechanism in greenhouse gas emission trading schemes that helps nations meet their emission commitments at lower costs. Carbon offsets take advantage of lower abatement cost ...

  9. A Parallel Coiled-Coil Tetramer with Offset Helices

    SciTech Connect (OSTI)

    Liu,J.; Deng, Y.; Zheng, Q.; Cheng, C.; Kallenbach, N.; Lu, M.

    2006-01-01

    Specific helix-helix interactions are fundamental in assembling the native state of proteins and in protein-protein interfaces. Coiled coils afford a unique model system for elucidating principles of molecular recognition between {alpha} helices. The coiled-coil fold is specified by a characteristic seven amino acid repeat containing hydrophobic residues at the first (a) and fourth (d) positions. Nonpolar side chains spaced three and four residues apart are referred to as the 3-4 hydrophobic repeat. The presence of apolar amino acids at the e or g positions (corresponding to a 3-3-1 hydrophobic repeat) can provide new possibilities for close-packing of {alpha}-helices that includes examples such as the lac repressor tetramerization domain. Here we demonstrate that an unprecedented coiled-coil interface results from replacement of three charged residues at the e positions in the dimeric GCN4 leucine zipper by nonpolar valine side chains. Equilibrium circular dichroism and analytical ultracentrifugation studies indicate that the valine-containing mutant forms a discrete {alpha}-helical tetramer with a significantly higher stability than the parent leucine-zipper molecule. The 1.35 {angstrom} resolution crystal structure of the tetramer reveals a parallel four-stranded coiled coil with a three-residue interhelical offset. The local packing geometry of the three hydrophobic positions in the tetramer conformation is completely different from that seen in classical tetrameric structures yet bears resemblance to that in three-stranded coiled coils. These studies demonstrate that distinct van der Waals interactions beyond the a and d side chains can generate a diverse set of helix-helix interfaces and three-dimensional supercoil structures.

  10. Slowed demand ushers in summer season

    SciTech Connect (OSTI)

    1996-07-01

    This article is the June 1996 market summary in uranium market. During this reporting period, there were six deals in the U3O8 spot market and three long-term deals for U3O8. There were four deals for UF6 conversion, and the spot market for uranium separation services had no transactions. This was little change from the previous month`s activities, and this slowness was reflected in the price trends of little or no increase.

  11. Slow Food in a Fat Society: Satisfying Ethical Appetites

    E-Print Network [OSTI]

    Paxson, Heather Anne

    Slow Food in a Fat Society Using historian Hillel Schwartz's utopian conception of a "fat society" as inspiration, this essay considers the potential contribution of the Slow Food movement to American notions of dietary ...

  12. Chapter 18. The E821 Slow Control System

    E-Print Network [OSTI]

    Brookhaven National Laboratory - Experiment 821

    Chapter 18. The E­821 Slow Control System Revised March 1994 18.1. Introduction The (g \\Gamma 2 system when they can. The slow control system then logs status information or trouble reports. The local control loops also have priority over control signals sent down to them from the slow control system

  13. Lead Slowing Down Spectrometer Status Report

    SciTech Connect (OSTI)

    Warren, Glen A.; Anderson, Kevin K.; Bonebrake, Eric; Casella, Andrew M.; Danon, Yaron; Devlin, M.; Gavron, Victor A.; Haight, R. C.; Imel, G. R.; Kulisek, Jonathan A.; O'Donnell, J. M.; Weltz, Adam

    2012-06-07

    This report documents the progress that has been completed in the first half of FY2012 in the MPACT-funded Lead Slowing Down Spectrometer project. Significant progress has been made on the algorithm development. We have an improve understanding of the experimental responses in LSDS for fuel-related material. The calibration of the ultra-depleted uranium foils was completed, but the results are inconsistent from measurement to measurement. Future work includes developing a conceptual model of an LSDS system to assay plutonium in used fuel, improving agreement between simulations and measurement, design of a thorium fission chamber, and evaluation of additional detector techniques.

  14. Slow Dynamics of Orbital Domains in Manganite

    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-effect Photovoltaics -7541 *Impact Neutron diffractionSlideshow: Innovation inSlow

  15. Slow Dynamics of Orbital Domains in Manganite

    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-effect Photovoltaics -7541 *Impact Neutron diffractionSlideshow: InnovationSlow

  16. Slow Dynamics of Orbital Domains in Manganite

    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 RoomPreservation ofAlbuquerque|Sensitive Species3performed Steven D. Pain OakEnergySlow

  17. Threshold Characteristics of Slow-Light Photonic Crystal Lasers

    E-Print Network [OSTI]

    Xue, Weiqi; Ottaviano, Luisa; Chen, Yaohui; Semenova, Elizaveta; Yvind, Kresten; Mork, Jesper

    2015-01-01

    The threshold properties of photonic crystal quantum dot lasers operating in the slow-light regime are investigated experimentally and theoretically. Measurements show that, in contrast to conventional lasers, the threshold gain attains a minimum value for a specific cavity length. The experimental results are explained by an analytical theory for the laser threshold that takes into account the effects of slow-light and random disorder due to unavoidable fabrication imperfections. Longer lasers are found to operate deeper into the slow-light region, leading to a trade-off between slow-light induced reduction of the mirror loss and slow-light enhancement of disorder-induced losses.

  18. Existence of Dendritic Crystal Growth with Stochastic Perturbations

    E-Print Network [OSTI]

    joe@ibmjoe Joseph R. Pickert

    1998-09-02

    Recall that freezing of the liquid phase releases latent heat. If this heat is not diffused away, it will warm up the interface and then slow down the growth. Thus, in ...

  19. Thermal slow evolution of compact objects

    E-Print Network [OSTI]

    Becerra, L; Nunez, L A

    2013-01-01

    We present a comparative study on the gravitational dissipative collapse for local and nonlocal anisotropic spherical matter configurations in the slow contraction approximation. The matter contents are radiant, anisotropic (unequal stresses) spherical local and nonlocal fluids, where the heat flux is described by causal thermodynamics, leading to a consistent determination of the temperature. It is found that both, local and nonlocal, matter configurations exhibit thermal peeling when most of the radiated energy comes from the outer layers of the distribution. This peeling occurs when different signs in the velocity of fluid elements appears, giving rise to the splitting of the matter configuration. This effect emerges as a combination of convection mass transfer and radiation flux, but is the intense radiation field at the outer layers of the object that causes of the peeling. This effect seems to be more violent for nonlocal configurations and it is very sensible to the initial mass of the energy flux prof...

  20. Dynamical Event during Slow Crack Propagation

    SciTech Connect (OSTI)

    Ma {sup o}loy, Knut Jorgen; Schmittbuhl, Jean

    2001-09-03

    We address the role of material heterogeneities on the propagation of a slow rupture at laboratory scale. With a high speed camera, we follow an in-plane crack front during its propagation through a transparent heterogeneous Plexiglas block. We obtain two major results. First, the slip along the interface is strongly correlated over scales much larger than the asperity sizes. Second, the dynamics is scale dependent. Locally, mechanical instabilities are triggered during asperity depinning and propagate along the front. The intermittent behavior at the asperity scale is in contrast with the large scale smooth creeping evolution of the average crack position. The dynamics is described on the basis of a Family-Vicsek scaling.

  1. Novel Slow Extraction Scheme for Proton Accelerators Using Pulsed...

    Office of Scientific and Technical Information (OSTI)

    Ring at Fermilab. The proposed method of non-resonant slow extraction of protons by bent crystals in combination with orbit fast deflectors shows great promise in...

  2. Update on Establishing the Feasibility of Lead Slowing Down Spectrosco...

    Office of Scientific and Technical Information (OSTI)

    of Lead Slowing Down Spectroscopy for Direct Measurement of Plutonium in Used Fuel Citation Details In-Document Search Title: Update on Establishing the Feasibility of...

  3. A Programmable 210 V Offset Rail-to-Rail GMC Filter

    E-Print Network [OSTI]

    Rincon-Mora, Gabriel A.

    milli-Volts glitch at the input of a high- speed high-resolution comparator, for instance, may1 A Programmable 210 µV Offset Rail-to-Rail GM­C Filter H. Pooya Forghani-zadeh1 , Student Member. Programmability is also a feature of growing significance because high performance state-of-the-art systems must

  4. Blade Offset and Pitch Effects on a High Solidity Vertical Axis Wind Turbine

    E-Print Network [OSTI]

    Tullis, Stephen

    Blade Offset and Pitch Effects on a High Solidity Vertical Axis Wind Turbine Andrzej J. Fiedler ABSTRACT A high solidity, small scale, 2.5m diameter by 3m high Vertical Axis Wind Turbine (VAWT in an open-air wind tunnel facility to investigate the effects of preset toe-in and toe-out turbine blade

  5. Kyotoforcommuters Offset schemes are a small but potentially useful addition to the carbon balance sheet.

    E-Print Network [OSTI]

    Cai, Long

    Kyotoforcommuters Offset schemes are a small but potentially useful addition to the carbon balance emissions in regions of the world where it is inexpensive to do so: for example, households in India or Peru address the issue. Consumers of goods and services that depend on the burning of fossil fuels also have

  6. Scheduling messages with offsets on Controller Area Network -a major performance boost

    E-Print Network [OSTI]

    Navet, Nicolas

    by car manufacturers is to schedule the messages with offsets, which leads to a desynchronization in the case of Controller Area Net- work, which is a de-facto standard in the automotive world. Comprehensive of traffic with the increasing amount of data exchanged between Electronic Control Units (ECUs). A car

  7. CARBON SEQUESTRATION IN ARABLE SOILS IS LIKELY TO INCREASE NITROUS OXIDE EMISSIONS, OFFSETTING

    E-Print Network [OSTI]

    CARBON SEQUESTRATION IN ARABLE SOILS IS LIKELY TO INCREASE NITROUS OXIDE EMISSIONS, OFFSETTING in strategies for climate protection. 1. Introduction Carbon sequestration has been highlighted recently concentration of carbon dioxide (CO2) in the atmo- sphere include sequestering carbon (C) in soils

  8. Reducing axial offset and improving stability in PWRs by using uraniumethorium fuel

    E-Print Network [OSTI]

    Demazière, Christophe

    Reducing axial offset and improving stability in PWRs by using uraniumethorium fuel Cheuk Wah Lau a that a new type uraniumethorium (UeTh) based fuel assembly could be used to achieve a more homogenous radial that a core containing UeTh fuel assemblies also reduces the AO and improves the core stability

  9. USC/ISI Technical Report ISI-TR-696 March 18, 2015 Implementation of the TCP Extended Data Offset Option

    E-Print Network [OSTI]

    Touch, Joe

    USC/ISI Technical Report ISI-TR-696 March 18, 2015 Implementation of the TCP Extended Data Offset Option Harry Trieu, Joe Touch, Ted Faber USC/ISI 4676 Admiralty Way, Suite 1001 Marina del Rey, CA 90292 310-822-1511 htrieu@usc.edu, touch@isi.edu, faber@isi.edu ABSTRACT TCP Extended Data Offset (EDO

  10. The sensitivity of patient specific IMRT QC to systematic MLC leaf bank offset errors

    SciTech Connect (OSTI)

    Rangel, Alejandra; Palte, Gesa; Dunscombe, Peter [Department of Medical Physics, Tom Baker Cancer Centre, 1331-29 Street NW, Calgary, Alberta T2N 4N2, Canada and Department of Physics and Astronomy, University of Calgary, 2500 University Drive North West, Calgary, Alberta T2N 1N4 (Canada); Department of Medical Physics, Tom Baker Cancer Centre, 1331-29 Street NW, Calgary, Alberta T2N 4N2 (Canada); Department of Medical Physics, Tom Baker Cancer Centre, 1331-29 Street NW, Calgary, Alberta T2N 4N2 (Canada); Department of Physics and Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4 (Canada) and Department of Oncology, Tom Baker Cancer Centre, 1331-29 Street NW, Calgary, Alberta T2N 4N2 (Canada)

    2010-07-15

    Purpose: Patient specific IMRT QC is performed routinely in many clinics as a safeguard against errors and inaccuracies which may be introduced during the complex planning, data transfer, and delivery phases of this type of treatment. The purpose of this work is to evaluate the feasibility of detecting systematic errors in MLC leaf bank position with patient specific checks. Methods: 9 head and neck (H and N) and 14 prostate IMRT beams were delivered using MLC files containing systematic offsets ({+-}1 mm in two banks, {+-}0.5 mm in two banks, and 1 mm in one bank of leaves). The beams were measured using both MAPCHECK (Sun Nuclear Corp., Melbourne, FL) and the aS1000 electronic portal imaging device (Varian Medical Systems, Palo Alto, CA). Comparisons with calculated fields, without offsets, were made using commonly adopted criteria including absolute dose (AD) difference, relative dose difference, distance to agreement (DTA), and the gamma index. Results: The criteria most sensitive to systematic leaf bank offsets were the 3% AD, 3 mm DTA for MAPCHECK and the gamma index with 2% AD and 2 mm DTA for the EPID. The criterion based on the relative dose measurements was the least sensitive to MLC offsets. More highly modulated fields, i.e., H and N, showed greater changes in the percentage of passing points due to systematic MLC inaccuracy than prostate fields. Conclusions: None of the techniques or criteria tested is sufficiently sensitive, with the population of IMRT fields, to detect a systematic MLC offset at a clinically significant level on an individual field. Patient specific QC cannot, therefore, substitute for routine QC of the MLC itself.

  11. Nuclear Symbiosis - A Means to Achieve Sustainable Nuclear Growth while Limiting the Spread of Sensititive Nuclear Technology

    SciTech Connect (OSTI)

    David Shropshire

    2009-09-01

    Global growth of nuclear energy in the 21st century is creating new challenges to limit the spread of nuclear technology without hindering adoption in countries now considering nuclear power. Independent nuclear states desire autonomy over energy choices and seek energy independence. However, this independence comes with high costs for development of new indigenous fuel cycle capabilities. Nuclear supplier states and expert groups have proposed fuel supply assurance mechanisms such as fuel take-back services, international enrichment services and fuel banks in exchange for recipient state concessions on the development of sensitive technologies. Nuclear states are slow to accept any concessions to their rights under the Non-Proliferation Treaty. To date, decisions not to develop indigenous fuel cycle capabilities have been driven primarily by economics. However, additional incentives may be required to offset a nuclear state’s perceived loss of energy independence. This paper proposes alternative economic development incentives that could help countries decide to forgo development of sensitive nuclear technologies. The incentives are created through a nuclear-centered industrial complex with “symbiotic” links to indigenous economic opportunities. This paper also describes a practical tool called the “Nuclear Materials Exchange” for identifying these opportunities.

  12. Slow light in paraffin-coated Rb vapor cells

    E-Print Network [OSTI]

    M. Klein; I. Novikova; D. F. Phillips; R. L. Walsworth

    2006-02-15

    We present preliminary results from an experimental study of slow light in anti-relaxation-coated Rb vapor cells, and describe the construction and testing of such cells. The slow ground state decoherence rate allowed by coated cell walls leads to a dual-structured electromagnetically induced transparency (EIT) spectrum with a very narrow (cell systems.

  13. Household scale slow sand filtration in the Dominican Republic

    E-Print Network [OSTI]

    Donison, Kori S. (Kori Shay), 1981-

    2004-01-01

    Slow sand filtration is a method of water treatment that has been used for hundreds of years. In the past two decades, there has been resurgence in interest in slow sand filtration, particularly as a low-cost, household-scale ...

  14. Identification of slow molecular order parameters for Markov model construction

    E-Print Network [OSTI]

    Perez-Hernandez, Guillermo; Giorgino, Toni; de Fabritiis, Gianni; Noé, Frank

    2013-01-01

    A goal in the kinetic characterization of a macromolecular system is the description of its slow relaxation processes, involving (i) identification of the structural changes involved in these processes, and (ii) estimation of the rates or timescales at which these slow processes occur. Most of the approaches to this task, including Markov models, Master-equation models, and kinetic network models, start by discretizing the high-dimensional state space and then characterize relaxation processes in terms of the eigenvectors and eigenvalues of a discrete transition matrix. The practical success of such an approach depends very much on the ability to finely discretize the slow order parameters. How can this task be achieved in a high-dimensional configuration space without relying on subjective guesses of the slow order parameters? In this paper, we use the variational principle of conformation dynamics to derive an optimal way of identifying the "slow subspace" of a large set of prior order parameters - either g...

  15. Map Shows Groundwater Decline Slowed LINCOLN, Neb. --Groundwater levels in Nebraska slowed their rate of decline and actually

    E-Print Network [OSTI]

    Nebraska-Lincoln, University of

    Map Shows Groundwater Decline Slowed LINCOLN, Neb. -- Groundwater levels in Nebraska slowed director of the UNL Water Center, said that the groundwater level maps produced annually by SNR, or stable groundwater levels, with oranges and reds indicating declines and greens and blues showing

  16. Using Measurements of Fill Factor at High Irradiance to Deduce Heterobarrier Band Offsets: Preprint

    SciTech Connect (OSTI)

    Olson, J. M.; Steiner, M. A.; Kanevce, A.

    2011-07-01

    Using a 2D device simulation tool, we examine the high irradiance behavior of a single junction, GaAs concentrator cell as a function of the doping in the back surface confinement layer. The confinement layer is designed to be a barrier for both holes and electrons in the base of the solar cell. For a p-type base we show that the FF of the cell at high concentrations is a strong function of both the magnitude of the valence band offset and the doping level in the barrier. In short, for a given valence band offset (VBO), there is a critical barrier doping, below which the FF drops rapidly with lower doping. This behavior is confirmed experimentally for a GaInP/GaAs double heterostructure solar cell where the critical doping concentration (at 500 suns) in the back surface confinement layer is ~1e18 cm-3 for a VBO of 300 meV.

  17. A new target concept for production of slow positrons

    SciTech Connect (OSTI)

    Qian, Y.L; White, M.

    1995-01-01

    Slow positrons in the energy range up to a few keV are useful for material sciences and surface studies. The Advanced Photon Source (APS) linear accelerator (linac) was designed to produce 8-mA of 450-MeV positrons. A 200-MeV, 1.7-Ampere electron beam impinges on a 7-mm-thick (2 radiation lengths) tungsten target, resulting in bremsstrahlung pair production of electrons and positrons. The existing target was optimized for high energy positron production, and most slow positrons produced by the electron-gamma shower remain trapped inside. The linac could also be used to produce slow positrons, and a modified target could increase the low energy positron yield. Use of a multilayer or segmented target reduces self-absorption by the target, and thus more fully utilizes the incident beam power for slow positron production. A slow positron yield of 10{sup 9}/sec is expected from the existing incident electron beam. Multilayer targets could probably be used by other accelerator-based slow positron sources to improve slow positron yield without increasing the incident beam power. Two variations of a multilayer target concept are presented and discussed in this paper.

  18. Global hydrological cycle response to rapid and slow global warming

    E-Print Network [OSTI]

    Kuang, Zhiming

    Global hydrological cycle response to rapid and slow global warming and Jiaxu Zhang #12;· Anthropogenic global warming causes "robust" changes in the global in the global hydrological cycle due to anthropogenic global warming Atmospheric radiative

  19. Band offsets of n-type electron-selective contacts on cuprous oxide (Cu[subscript 2]O) for photovoltaics

    E-Print Network [OSTI]

    Brandt, Riley E.

    The development of cuprous oxide (Cu [subscript 2]O) photovoltaics (PVs) is limited by low device open-circuit voltages. A strong contributing factor to this underperformance is the conduction-band offset between Cu ...

  20. Sequence optimization to reduce velocity offsets in cardiovascular magnetic resonance volume flow quantification - A multi-vendor study

    E-Print Network [OSTI]

    Rolf, Marijn P.; Hofman, Mark B. M.; Gatehouse, Peter D.; Markenroth Bloch, Karin; Heymans, Martijn W.; Ebbers, Tino; Graves, Martin J.; Totman, John J.; Werner, Beat; Rossum, Albert C. van; Kilner, Philip J.; Heethaar, Rob M.

    2011-03-09

    slice orientation), symmetric velocity encod- ing, asymmetric RF pulse, no partial echo, default gradient mode. The background phase-offset correction (’LPC fil- ter’) was switched off, as the evaluation of software algo- rithms for post...

  1. Development of a Seismic Snow Streamer and Use of Multi-Offset Reflection for Determining Glacier Ice Properties

    E-Print Network [OSTI]

    Velez Gonzalez, Jose Antonio

    2012-12-31

    source was 0.5 kilograms of pentaerythritoltetranitrate (PETN) placed in shot holes buried 10 meters below the surface. For this experiment, the recording array of geophones remained stationary and twenty- two seismic sources were deployed at offsets... source was 0.5 kilograms of pentaerythritoltetranitrate (PETN) placed in shot holes buried 10 meters below the surface. For this experiment, the recording array of geophones remained stationary and twenty- two seismic sources were deployed at offsets...

  2. The role of microtubules in rapid hyphal tip growth of Aspergillus nidulans

    E-Print Network [OSTI]

    Horio, Tetsuya; Oakley, Berl R.

    2005-02-01

    of growth fluctuated over time from almost 0–0.194 #2;m/min. These germlings underwent repeated slow but steady growth periods punctuated by pauses in growth (Figure 1B). Tip growth in hyphal tip cells was steadier and much more rapid (0.506 #3; 0.21 #2;m..., and there was no obvious slowing of growth as germlings went through mitosis (Figure 1B). It is well established that the nuclei in the same cytoplas- mic compartment go into mitosis in semisynchronous man- ner (Robinow, 1969; Doonan, 1992). Time-lapse observations...

  3. Microsoft Word - Highlights.docx

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

    growth will slow to 2.6 Bcfd in 2012 and 0.4 Bcfd in 2013, as the reduction in drilling activity is offset by growth in production from liquids-rich natural gas...

  4. Halden In-Reactor Test to Exhibit PWR Axial Offset Anomaly

    SciTech Connect (OSTI)

    P.Bennett, B. Beverskog, R.Suther

    2004-12-01

    Many PWRs have encountered the axial offset anomaly (AOA) since the early 1990s, and these experiences have been reported widely. AOA is a phenomenon associated with localized boron hideout in corrosion product deposits (crud) on fuel surfaces. Several mitigation approaches have been developed or are underway to either delay the onset of AOA or avoid it entirely. This study describes the first phase of an experimental program designed to investigate whether the use of enriched boric acid (EBA) in the reactor coolant can mitigate AOA.

  5. Nighttime Offset and Capping Experiment Results of the Isothermal Pyranometer at the 2001 Diffuse Shortwave IOP

    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 wouldMass map shinesSolarNew scholarshipThreeFebruary 2015 ESH&SCSUWayneNicoleCloudOffset

  6. Accelerating axonal growth promotes motor recovery after peripheral nerve injury in mice

    E-Print Network [OSTI]

    Gertler, Frank

    Although peripheral nerves can regenerate after injury, proximal nerve injury in humans results in minimal restoration of motor function. One possible explanation for this is that injury-induced axonal growth is too slow. ...

  7. A comprehensive investigation on the slowing down of cosmic acceleration

    E-Print Network [OSTI]

    Hu, Yazhou; Li, Nan; Wang, Shuang

    2015-01-01

    In~\\citep{Shafieloo2009}, Shafieloo, Sanhi and Starobinsky firstly proposed the possibility that the current cosmic acceleration (CA) is slowing down. This is rather counterintuitive, because a slowing down CA cannot be accommodated in almost all the mainstream cosmological models. In this work, by exploring the evolutionary trajectories of dark energy equation of state $w(z)$ and deceleration parameter $q(z)$, we present a comprehensive investigation on the slowing down of CA from both the theoretical and the observational sides. For the theoretical side, we study the impacts of different $w(z)$ by using six parametrization models, and then discuss the effects of spatial curvature. For the observational side, we investigate the effects of different type Ia supernovae (SNe Ia), different baryon acoustic oscillation (BAO), and different cosmic microwave background (CMB) data, respectively. We find that the evolution of CA are insensitive to the specific form of $w(z)$; in contrast, a non-flat Universe more fav...

  8. Restricted growth of Schwann cells lacking Cajal bands slows conduction in myelinated nerves 

    E-Print Network [OSTI]

    Court, Felipe A; Sherman, Diane L; Pratt, Thomas; Garry, Emer M; Ribchester, Richard R; Cottrell, David F; Fleetwood-Walker, Susan; Brophy, Peter J.

    2004-09-09

    Nerve impulses are propagated at nodes of Ranvier in the myelinated nerves of vertebrates. Internodal distances have been proposed to affect the velocity of nerve impulse conduction; however, direct evidence is lacking, ...

  9. The Rising Strength of Management, High Unemployment and Slow Growth: Revisiting Okun’s Law

    E-Print Network [OSTI]

    Reich, Michael

    2012-01-01

    primarily wages but also raw materials prices—had squeezedthe demand for labor, raw materials, and other inputs fasterespecially in the labor and raw material markets. Weisskopf

  10. The Rising Strength of Management, High Unemployment and Slow Growth: Revisiting Okun’s Law

    E-Print Network [OSTI]

    Reich, Michael

    2012-01-01

    time to a low-road business model in the US, one in whichshift in the corporate business model meant that employersmuch the corporate business model has shifted. As Hallock et

  11. ON THE PERSISTENCE OF LABOR MARKET INSECURITY AND SLOW GROWTH IN THE US: Reckoning with the Waltonist Growth Regime

    E-Print Network [OSTI]

    Vidal, Matt

    2010-01-01

    Lean Retailing and the Transformation of Manufacturing --manufacturing labor process par excellence is leanof lean production in the U.S. manufacturing field and a

  12. Shallow melt apparatus for semicontinuous czochralski crystal growth

    DOE Patents [OSTI]

    Wang, Tihu; Ciszek, Theodore F.

    2006-01-10

    In a single crystal pulling apparatus for providing a Czochralski crystal growth process, the improvement of a shallow melt In a single crystal pulling apparatus for providing a Czochralski crystal growth process, the improvement of a shallow melt crucible (20) to eliminate the necessity supplying a large quantity of feed stock materials that had to be preloaded in a deep crucible to grow a large ingot, comprising a gas tight container a crucible with a deepened periphery (25) to prevent snapping of a shallow melt and reduce turbulent melt convection; source supply means for adding source material to the semiconductor melt; a double barrier (23) to minimize heat transfer between the deepened periphery (25) and the shallow melt in the growth compartment; offset holes (24) in the double barrier (23) to increase melt travel length between the deepened periphery (25) and the shallow growth compartment; and the interface heater/heat sink (22) to control the interface shape and crystal growth rate.

  13. Robust concatenated codes for the slow Rayleigh fading channel 

    E-Print Network [OSTI]

    Hsu, Teh-Hsuan

    2009-05-15

    at the receiver (perfect CSIR). Since we are interested in the slow fading channel, outage capacity is used as the measure of performance. Good space-time codes can be designed so as to maximize the so-called rank and the determinant criteria. However, a practical...

  14. Figure 1. Typical Slow Sand Filter Schematic Supernatant Water

    E-Print Network [OSTI]

    Figure 1. Typical Slow Sand Filter Schematic Headspace Supernatant Water Schmutzdecke Raw water for support and also at the bottom an underdrain system collects the filtered water (Figure 1). As water of SSFs to marginal source waters, filter harrowing and faster methods of filter scraping have greatly

  15. Pickering -Slowing the flow Flood Storage Option July 2011

    E-Print Network [OSTI]

    to build upstream flood storage to reduce the risk of flooding to residents in Pickering has been putPickering - Slowing the flow Flood Storage Option July 2011 Update As you know, our proposal in relation to the flood storage option. These are as follows:- · We will reassess the current design proposal

  16. Steady detonation problem for slow and fast chemical reactions

    E-Print Network [OSTI]

    Ceragioli, Francesca

    Steady detonation problem for slow and fast chemical reactions F. Conforto1 , M. Groppi2 , R chemical reaction are discussed. The former consists in a system of balance laws for the case of a chemical is a system of conser- vation laws for the case of short chemical relaxation time (fast reaction). After

  17. Slowing the Flow at Pickering PROGRAMME DELIVERY GROUP MEETING

    E-Print Network [OSTI]

    Slowing the Flow at Pickering PROGRAMME DELIVERY GROUP MEETING The Mill Suite, Memorial Hall the group on construction of debris dams in Cropton East (Pickering Beck catchment). A team of National Park/River Seven ­ TN confirmed that the Seven modelling report including the results of the cross

  18. Matched slow pulses using double electromagnetically induced transparency

    E-Print Network [OSTI]

    Lvovsky, Alexander

    Matched slow pulses using double electromagnetically induced transparency Andrew MacRae,* Geoff, 2008 We implement double electromagnetically induced transparency (DEIT) in rubidium vapor using Optical Society of America OCIS codes: 270.1670, 270.5585, 190.5530. Electromagnetically induced

  19. The fundamental Diagram of Pedestrian Model with Slow Reaction

    E-Print Network [OSTI]

    Fang, Jun; Hu, Hao; Xu, Zhaohui; Li, Huan

    2015-01-01

    The slow-to-start models are a classical cellular automata model in simulating vehicle traffic. However, to our knowledge, the slow-to-start effect has not considered in modeling pedestrian dynamic. We verify the similar behavior between pedestrian and vehicle, and propose an new lattice gas (LG) model called the slow reaction (SR) model to describe the pedestrian's delayed reaction in single-file movement. We simulate and reproduce the Seyfried's field experiments at the research centre Julich, and use its empirical data to validate our SR model. We compare the SR model with the standard LG model. We test different probability of slow reaction ps in SR model and found the simulation data of ps=0.3 fit the empirical data best. The RMS error of mean velocity of SR model is smaller than that of standard LG model. In the range of ps=0.1~0.3, our fundamental diagram between velocity and density by simulation coincides with field experiments. The distribution of individual velocity in fundamental diagram in SR mod...

  20. Slow Crack Propagation in Heterogeneous Materials J. Kierfeld1

    E-Print Network [OSTI]

    Kierfeld, Jan

    explained by Griffith [2]--while homogeneously amorphous systems exhibit slow ductile fracture controlled, whether frozen defects enhance or degrade the fracture toughness of a material. The inspiring work [5 materials with frozen defects contain a large number of arrested microcracks and that their fracture

  1. Agricultural Soil Carbon Sequestration Offset Programs: Strengths, Difficulties, and Suggestions for Their Potential Use in AB 32's Cap and Trade Program

    E-Print Network [OSTI]

    Bernadett, Lauren

    2013-01-01

    offset credits for installing “a biogas control system thatemissions by installing biogas control systems (BCS), whichin exchange for installing biogas control systems (BCS), a

  2. Fast Fermi Acceleration and Entropy Growth

    E-Print Network [OSTI]

    Tiago Pereira; Dmitry Turaev

    2015-03-13

    Fermi acceleration is the process of energy transfer from massive objects in slow motion to light objects that move fast. The model for such process is a time-dependent Hamiltonian system. As the parameters of the system change with time, the energy is no longer conserved, which makes the acceleration possible. One of the main problems is how to generate a sustained and robust energy growth. We show that the non-ergodicity of any chaotic Hamiltonian system must universally lead to the exponential growth of energy at a slow periodic variation of parameters. We build a model for this process in terms of a Geometric Brownian Motion with a positive drift and relate it to the entropy increase.

  3. Offset-free rail-to-rail derandomizing peak detect-and-hold circuit

    DOE Patents [OSTI]

    DeGeronimo, Gianluigi (Nesconset, NY); O'Connor, Paul (Bellport, NY); Kandasamy, Anand (Coram, NY)

    2003-01-01

    A peak detect-and-hold circuit eliminates errors introduced by conventional amplifiers, such as common-mode rejection and input voltage offset. The circuit includes an amplifier, three switches, a transistor, and a capacitor. During a detect-and-hold phase, a hold voltage at a non-inverting in put terminal of the amplifier tracks an input voltage signal and when a peak is reached, the transistor is switched off, thereby storing a peak voltage in the capacitor. During a readout phase, the circuit functions as a unity gain buffer, in which the voltage stored in the capacitor is provided as an output voltage. The circuit is able to sense signals rail-to-rail and can readily be modified to sense positive, negative, or peak-to-peak voltages. Derandomization may be achieved by using a plurality of peak detect-and-hold circuits electrically connected in parallel.

  4. Radiative forcing and temperature response to changes in urban albedos and associated CO2 offsets

    SciTech Connect (OSTI)

    Menon, Surabi; Akbari, Hashem; Mahanama, Sarith; Sednev, Igor; Levinson, Ronnen

    2010-02-12

    The two main forcings that can counteract to some extent the positive forcings from greenhouse gases from pre-industrial times to present-day are the aerosol and related aerosol-cloud forcings, and the radiative response to changes in surface albedo. Here, we quantify the change in radiative forcing and land surface temperature that may be obtained by increasing the albedos of roofs and pavements in urban areas in temperate and tropical regions of the globe by 0.1. Using the catchment land surface model (the land model coupled to the GEOS-5 Atmospheric General Circulation Model), we quantify the change in the total outgoing (outgoing shortwave+longwave) radiation and land surface temperature to a 0.1 increase in urban albedos for all global land areas. The global average increase in the total outgoing radiation was 0.5 Wm{sup -2}, and temperature decreased by {approx}0.008 K for an average 0.003 increase in surface albedo. These averages represent all global land areas where data were available from the land surface model used and are for the boreal summer (June-July-August). For the continental U.S. the total outgoing radiation increased by 2.3 Wm{sup -2}, and land surface temperature decreased by {approx}0.03 K for an average 0.01 increase in surface albedo. Based on these forcings, the expected emitted CO{sub 2} offset for a plausible 0.25 and 0.15 increase in albedos of roofs and pavements, respectively, for all global urban areas, was found to be {approx} 57 Gt CO{sub 2}. A more meaningful evaluation of the impacts of urban albedo increases on global climate and the expected CO{sub 2} offsets would require simulations which better characterizes urban surfaces and represents the full annual cycle.

  5. Prospects for international trade in environmental services: An analysis of international carbon emission off-sets

    SciTech Connect (OSTI)

    Swisher, J.N.

    1991-01-01

    This dissertation presents a case study analysis in which the costs to a US electric utility of reducing its carbon dioxide (CO{sub 2}) emissions are compared with the costs of carbon-saving forestry projects in Costa Rica and Guatemala. The results show that a large electric utility in the south-central US would find it relatively inexpensive, even profitable given a conducive regulatory treatment, to reduce its CO{sub 2} emissions by a few percent over the next ten years, through direct investment in energy end-use efficiency improvements. In comparison, the costs of the forestry projects studied in Central America range from $1/TC to a worst-case value of about $55/TC, with most project costs between $5 and $13/TC, depending on the type of project, the climate, and the opportunity cost of land. The total amount of CO{sub 2} storage potential is significant, about 100 million tons per country, but not enough to suggest that forestry can offset more than a few percent of global CO{sub 2} emissions from fossil fuel use. These case studies suggest that international trade in the environmental service of reducing global CO{sub 2} accumulation could have significant economic and ecological benefits. A transaction in which a utility pays for forestry projects in exchange for credit against an emission reduction policy is an example of an international carbon emission offset (ICEO). ICEO's could provide a currency for funding carbon-saving services as a way to comply with national policies to reduce CO{sub 2} emissions, as long as compliance is allowed through investments in other countries. This type of North-South transfer is necessary to reconcile economic efficiency and international equity, because of the disparity between the national allocations of responsibility for greenhouse gas emissions and opportunities for emission reductions.

  6. 8. SLOWING-DOWNIN NON-CIRCULARTOKAMAKS To fully describe the collisional slowing-down of fast ions

    E-Print Network [OSTI]

    Hively, Lee M.

    ions in non-circular tokamaks, the formulation of Chapter 7 has been extended to include large banana of large energy transfer (LET) interactions has been modeled by the multi-groupmethod [78-80J). Ohnishi et al. [35J examined alpha losses to the first wall during slowing down and pitch-angle scattering

  7. Shallow Melt Apparatus for Semicontinuous Czochralski Crystal Growth

    DOE Patents [OSTI]

    Wang, T.; Ciszek, T. F.

    2006-01-10

    In a single crystal pulling apparatus for providing a Czochralski crystal growth process, the improvement of a shallow melt crucible (20) to eliminate the necessity supplying a large quantity of feed stock materials that had to be preloaded in a deep crucible to grow a large ingot, comprising a gas tight container a crucible with a deepened periphery (25) to prevent snapping of a shallow melt and reduce turbulent melt convection; source supply means for adding source material to the semiconductor melt; a double barrier (23) to minimize heat transfer between the deepened periphery (25) and the shallow melt in the growth compartment; offset holes (24) in the double barrier (23) to increase melt travel length between the deepened periphery (25) and the shallow growth compartment; and the interface heater/heat sink (22) to control the interface shape and crystal growth rate.

  8. Geophys. J. Int. (1991) 107, 493-503 Viability of shear-wave amplitude versus offset studies in anisotropic

    E-Print Network [OSTI]

    Edinburgh, University of

    1991-01-01

    rockmass. Such information is important for reservoir characterization and other hydrocarbon production versus offset (AVO) techniques are studied to see if they provide a more viable method of determining. Crampin time delays to build up. In many cases, such as the Austin Chalk in Texas, where the structure

  9. Crosswell Seismic Amplitude-Versus-Offset for Detailed Imaging of Facies and Fluid Distribution within Carbonate Oil Reservoirs

    E-Print Network [OSTI]

    Crosswell Seismic Amplitude-Versus-Offset for Detailed Imaging of Facies and Fluid Distribution, and demonstrate a method of using crosswell seismic profiling for identification of trapped oil, bypassed reservoir compartments, and location of fluid fronts in carbonate reefs. The method of crosswell seismic

  10. Standing Slow MHD Waves in Radiatively Cooling Coronal Loops

    E-Print Network [OSTI]

    Al-Ghafri, Khalil Salim

    2015-01-01

    The standing slow magneto-acoustic oscillations in cooling coronal loops are investigated. There are two damping mechanisms which are considered to generate the standing acoustic modes in coronal magnetic loops namely thermal conduction and radiation. The background temperature is assumed to change temporally due to optically thin radiation. In particular, the background plasma is assumed to be radiatively cooling. The effects of cooling on longitudinal slow MHD modes is analytically evaluated by choosing a simple form of radiative function that ensures the temperature evolution of the background plasma due to radiation coincides with the observed cooling profile of coronal loops. The assumption of low-beta plasma leads to neglect the magnetic field perturbation and eventually reduces the MHD equations to a 1D system modelling longitudinal MHD oscillations in a cooling coronal loop. The cooling is assumed to occur on a characteristic time scale much larger than the oscillation period that subsequently enables...

  11. Slow Magnetoacoustic Oscillations in the Microwave Emission of Solar Flares

    E-Print Network [OSTI]

    Kim, Sujin; Shibasaki, K

    2013-01-01

    Analysis of the microwave data, obtained in the 17 GHz channel of the Nobeyama Radioheliograph during the M1.6 flare on 4th Nov 2010, revealed the presence of 11.8-min oscillations of the emitting plasma density. The oscilla- tions decayed with the characteristic time of about 25-min. These oscillations are also well-seen in the variation of EUV emission intensity measured in the 335 A channel of SDO/AIA. The observed properties of the oscillations are consistent with the properties of so-called SUMER oscillations, observed in the EUV and soft X-ray bands usually as a periodic Doppler shift. The accepted interpretation of SUMER oscillations is a standing slow magnetoacoustic wave. Our analysis presents the first direct observation of the slow magnetoacoustic oscillations in the microwave emission of a solar flare.

  12. A slow control system for the Garfield apparatus

    E-Print Network [OSTI]

    M. Giacchini; F. Gramegna; S. Bertocco

    2001-11-09

    The major part of the GARFIELD apparatus electronics are monitored and set up through a slow control system, which has been developed at LNL. A software package based on Lab View has been dedicated to the setting and control of 16 channels integrated Amplifiers and Constant Fraction Discriminators. GPIB controllers and GPIB-ENET interfaces have been used for the communication between the Personal Computer and the front-end of the electronics.

  13. INFN ROMA AMS 03/08 Gas Slow Control System

    E-Print Network [OSTI]

    Roma "La Sapienza", Università di

    INFN ROMA AMS 03/08 1/38 AMS-02 TRD Gas Slow Control System Specifications v 5.2 27-03-2008 A ROMA AMS 03/08 3/38 1. ABSTRACT 5 2. GAS SYSTEM FUNCTIONAL DESCRIPTION 5 3. GAS CONTROL SYSTEM 8 4. CONTROL SYSTEM COMPONENTS 12 a. Universal Control System Module (UGSCM) 12 b. Box-S Control Board (UGBS

  14. Slow, stable delamination in graphite/epoxy composites 

    E-Print Network [OSTI]

    Razi, Hamid

    1982-01-01

    SLOB, STABLE DELAFIINATION IN GRAPHITE/EPOXY COMPOSITES A Thesis by HAMID RA2I Submitted to the Graduate College of Texas ASM University in partial fulfillment of the reouirement for the degree of MASTER OF SCIENCE December 1982 Major... Subject: Mechanical Engineering SLOW, STABLE DELAMINATION IN GRAPHITE/EPOXY COMPOSITES A Thesis by HAMID RAZI Approved as to style and content by: (R. A. Schapery, hair (J. R. Wa ton, Member) (W. L. Bradley, Membe . R. Hopkins, ead of Department...

  15. 8 Lighten the LoadTM Carbon Neutral Laundry Rooms Mac-Gray Campus Solutions recognizes that carbon offsetting is not without controversy, but also

    E-Print Network [OSTI]

    Alexandrova, Ivana

    and to invest in emerging technologies and proven ways of negating a carbon footprint. Of course, reducing48 8 Lighten the LoadTM Carbon Neutral Laundry Rooms Mac-Gray Campus Solutions recognizes that carbon offsetting is not without controversy, but also understands that offsetting is a viable short

  16. GEOPHYSICS, VOL. 62, NO. 2 (MARCH-APRIL 1997); p. 676-689,9 FIGS., 2 TABLES. Processing of a nine-component near-offset

    E-Print Network [OSTI]

    Edinburgh, University of

    scheme for process- ing a multicomponent vertical seismic profile (VSP). This sequence is applied near-offset vertical seismic profiles (VSPs) are of particular value since the directly trans- mitted-component near-offset VSP for seismic anisotropy Colin MacBeth*, Xiang-Yang Li*, Xinwu Zeng*, Dale Coxs, and John

  17. Response of Escherichia coli growth rate to osmotic shock

    E-Print Network [OSTI]

    Das, Rhiju

    Response of Escherichia coli growth rate to osmotic shock Enrique Rojasa,b,c , Julie A. Theriotb of pressure. Oscillatory hyper- osmotic shock revealed that although plasmolysis slowed cell elongation unaffected by osmotic shock. These results reveal the simple nature of E. coli cell-wall expansion

  18. Non-Foster Circuit Loaded Periodic Structures for Broadband Fast and Slow Wave Propagation

    E-Print Network [OSTI]

    Long, Jiang

    2015-01-01

    1.1 Periodic Structure, Fast and Slow Wave Propagation . 1.2for a periodic structure. . . . . . . Slow and fast waveA unit cell of a periodic structure . . . . .

  19. Electron electric dipole moment experiment using electric-field quantized slow cesium atoms

    E-Print Network [OSTI]

    Amini, Jason M.; Munger Jr., Charles T.; Gould, Harvey

    2007-01-01

    electric-?eld quantized slow cesium atoms Jason M. Amini, ?e-EDM) experiment using slow cesium atoms, nulled magnetic ?enhancement factor R for the cesium ground state is 114 ±

  20. Lead Slowing-Down Spectrometry for Spent Fuel Assay: FY12 Status...

    Office of Scientific and Technical Information (OSTI)

    Lead Slowing-Down Spectrometry for Spent Fuel Assay: FY12 Status Report Citation Details In-Document Search Title: Lead Slowing-Down Spectrometry for Spent Fuel Assay: FY12 Status...

  1. Surface Reaction Kinetics of Ga 1x In x P Growth During Pulsed Chemical Beam Epitaxy

    E-Print Network [OSTI]

    Surface Reaction Kinetics of Ga 1­x In x P Growth During Pulsed Chemical Beam Epitaxy N. Dietz 1 growth has been a slow process because little is known about chemical reaction properties and reaction into the surface reaction kinetics during an organometallic deposition process. These insights will allow us

  2. Neogene tectonics of northern Central America prior to offset across the polochic fault

    SciTech Connect (OSTI)

    Burkart, B.; Sanchez-Barreda, L.A.; Deaton, B.C.

    1985-01-01

    The reconstruction which removes 130 km of documented left slip across the Polochic fault of northern Guatemala and southern Chiapas juxtaposes the foundered block of the Gulf of Tehuantepec and extensional terrane of Guatemala, lining up prolongations of the Motagua and Jocotan faults with known structures along the coastal margin of the Chiapas massif and within the Gulf. Coast-parallel faults with sinistral displacement, located along the margins of the Chiapas depression, were also active during the Miocene time interval of south-easterly migration of the Gulf of Tehuantepec block. Extensional terrane is well expressed in Guatemala and Honduras south of the Jocotan boundary fault, beginning where the southeasterly-moving block encounters the abrupt bend in the boundary fault. This complex plate boundary became simpler when the left-lateral, east-west-trending Polochic fault sliced across the isthmus in late Miocene, offsetting Laramide structures and the arcuate Neogene plate boundary faults. During its time of major activity the Polochic served as the principal plate boundary fault, across which the major displacement occurred. Today the western part of the NOAM-CARIB plate boundary is diffuse. From western Guatemala and southern Chiapas, where buckling and locking of the Polochic fault has taken place, displacement is distributed among countless shears which extend in a belt from western Guatemala across the Chiapas massif to the western landframe of the Gulf of Tehuantepec.

  3. Neutron Slowing Down in a Detector with Absorption Sara A. Pozzi*

    E-Print Network [OSTI]

    Pázsit, Imre

    Neutron Slowing Down in a Detector with Absorption Sara A. Pozzi* Oak Ridge National Laboratory, P of scattering collisions undergone by fast neutrons as they slow down until they are absorbed was presented realistic case of neutron slowing down in a homogeneous mixture. The formulas are derived and evaluated

  4. Slow electromagnetic pulse propagation through a narrow transmission band in a coaxial photonic crystal

    E-Print Network [OSTI]

    Robertson, William

    Slow electromagnetic pulse propagation through a narrow transmission band in a coaxial photonic the slow group-velocity propagation of electromagnetic pulses through a narrow transmission band describe a simple experimental configuration that leads to slow-group-velocity electromagnetic pulse

  5. Slow dynamics in a model of the cellulose network

    E-Print Network [OSTI]

    O. V. Manyuhina; A. Fasolino; M. I. Katsnelson

    2007-06-07

    We present numerical simulations of a model of cellulose consisting of long stiff rods, representing cellulose microfibrils, connected by stretchable crosslinks, representing xyloglucan molecules, hydrogen bonded to the microfibrils. Within a broad range of temperature the competing interactions in the resulting network give rise to a slow glassy dynamics. In particular, the structural relaxation described by orientational correlation functions shows a logarithmic time dependence. The glassy dynamics is found to be due to the frustration introduced by the network of xyloglucan molecules. Weakening of interactions between rod and xyloglucan molecules results in a more marked reorientation of cellulose microfibrils, suggesting a possible mechanism to modify the dynamics of the plant cell wall.

  6. Continuous guided beams of slow and internally cold polar molecules

    E-Print Network [OSTI]

    Sommer, Christian; Motsch, Michael; Pohle, Sebastian; Bayerl, Josef; Pinkse, Pepijn W H; Rempe, Gerhard

    2008-01-01

    We describe the combination of buffer-gas cooling with electrostatic velocity filtering to produce a high-flux continuous guided beam of internally cold and slow polar molecules. In a previous paper (L.D. van Buuren et al., arXiv:0806.2523v1) we presented results on density and state purity for guided beams of ammonia and formaldehyde using an optimized set-up. Here we describe in more detail the technical aspects of the cryogenic source, its operation, and the optimization experiments that we performed to obtain best performance. The versatility of the source is demonstrated by the production of guided beams of different molecular species.

  7. Evidence For The Production Of Slow Antiprotonic Hydrogen In Vacuum

    E-Print Network [OSTI]

    N. Zurlo; M. Amoretti; C. Amsler; G. Bonomi; C. Carraro; C. L. Cesar; M. Charlton; M. Doser; A. Fontana; R. Funakoshi; P. Genova; R. S. Hayano; L. V. Jorgensen; A. Kellerbauer; V. Lagomarsino; R. Landua; E. Lodi Rizzini; M. Macrì; N. Madsen; G. Manuzio; D. Mitchard; P. Montagna; L. G. Posada; H. Pruys; C. Regenfus; A. Rotondi; G. Testera; D. P. Van der Werf; A. Variola; L. Venturelli; Y. Yamazaki

    2007-08-28

    We present evidence showing how antiprotonic hydrogen, the quasistable antiproton-proton (pbar-p) bound system, has been synthesized following the interaction of antiprotons with the hydrogen molecular ion (H2+) in a nested Penning trap environment. From a careful analysis of the spatial distributions of antiproton annihilation events, evidence is presented for antiprotonic hydrogen production with sub-eV kinetic energies in states around n=70, and with low angular momenta. The slow antiprotonic hydrogen may be studied using laser spectroscopic techniques.

  8. Enhancing the efficiency of SnS solar cells via band-offset engineering with a zinc oxysulfide buffer layer

    E-Print Network [OSTI]

    .1063/1.4789855] The toxicity of Cd and the scarcity of Te, In, and Ga used in CdTe and Cu(In,Ga)S2 (CIGS) thin-film solar cellsEnhancing the efficiency of SnS solar cells via band-offset engineering with a zinc oxysulfideS is a promising earth-abundant material for photovoltaic applications. Heterojuction solar cells were made

  9. Conduction-Band-Offset Rule Governing J-V Distortion in CdS/CI(G)S Solar Cells

    E-Print Network [OSTI]

    Sites, James R.

    Conduction-Band-Offset Rule Governing J-V Distortion in CdS/CI(G)S Solar Cells A. Kanevce, MV at the n/p interface of a solar cell can lead to significant distortion of the current-voltage (J-V) curve-layer [TCO/CdS/CI(G)S] approximation for the solar cell. The parameters that influence the barrier height

  10. Non-slow-roll dynamics in $\\alpha-$attractors

    E-Print Network [OSTI]

    Kumar, K Sravan; Moniz, Paulo Vargas; Das, Suratna

    2015-01-01

    In this paper we consider the $\\alpha-$attractor model and study inflation under a generalization of slow-roll dynamics. We follow the recently proposed Gong \\& Sasaki approach \\cite{Gong:2015ypa} of assuming $N=N\\left(\\phi\\right)$. We relax the requirement of inflaton potential flatness and consider a sufficiently steep one to support 60-efoldings. We find that this type of inflationary scenario predicts an attractor at $n_{s}\\approx0.967$ and $r\\approx5.5\\times10^{-4}$ which are very close to the predictions of the first chaotic inflationary model in supergravity (Goncharov-Linde model) \\cite{Goncharov:1983mw}. We show that even with non-slow-roll dynamics, the $\\alpha-$attractor model is compatible with any value of $r<0.1$. In addition, we emphasize that in this particular inflationary scenario, the standard consistency relation $\\left(r\\simeq-8n_{t}\\right)$ is significantly violated and we find an attractor for tensor tilt at $n_{t}\\approx-0.034$ as $r\\rightarrow0$. Any prominent detection of the ...

  11. Offset, tilted dipole models of Uranian smooth high-frequency radio emission

    SciTech Connect (OSTI)

    Schweitzer, A.E.; Romig, J.H.; Evans, D.R.; Sawyer, C.B. (Radiophysics, Inc., Boulder, CO (USA)); Warwick, J.W. (Radiophysics, Inc., Boulder, CO (USA) Univ. of Colorado, Boulder (USA))

    1990-09-01

    During the Voyager 2 encounter with Uranus in January 1986, the Planetary Radio Astronomy (PRA) experiment detected a complex pattern of radio emissions. Two types of emissions were seen: smooth and bursty. The smooth emission has been divided into smooth high-frequency (SHF) and smooth low-frequency (SLF) components which are presumed to come from different sources because of their distinctly different characteristics. The SHF component is considered in this paper. The SHF emission has been modeled by many authors on OTD (offset, tilted dipole (Ness et al., 1986)) L shells ranging from 5 to 40. However, the bursts have been modeled at much higher L shells. The authors complete an OTD investigation of the SHF emission at high L shells within the range of the bursty source locations, and present a viable high L shell model. This model has fundamentally the same longitudinally symmetric net emission pattern in space as the L shell 5 model presented in Romig et al. (1987) and Barbosa (1988). However, they were unable to produce an acceptable model on intermediate L shells without restricting source longitude. They discuss the similarities and distinctions between their two models and the models of other authors. They believe that the high L shell model (and others similar to it) cannot account for the observed smoothness and periodicity of the SHF emissions because it has open field lines containing untrapped particles, which should produce more variable emission than that seen in the SHF data. Therefore, the authors prefer models at L shells less than 18, the boundary for closed field lines (Ness et al., 1986). They then discuss and contrast two models within this boundary: the L = 5 model and an L {approx} 12 model by Kaiser et al. (1987) and Farrell and Calvert (1989b). The main distinction between these two models is the longitudinal extent of the source location.

  12. Agricultural Soil Carbon Sequestration Offset Programs: Strengths, Difficulties, and Suggestions for Their Potential Use in AB 32's Cap and Trade Program

    E-Print Network [OSTI]

    Bernadett, Lauren

    2013-01-01

    pdf; Section 3: Emissions Trading/Offset Credits – A Market1, 2013. 19 Under the Emissions Trading Program , L EGAL Pand-ab-32s- emissions-trading-program/. Additionally,

  13. Transient Thermal, Hydraulic, and Mechanical Analysis of a Counter Flow Offset Strip Fin Intermediate Heat Exchanger using an Effective Porous Media Approach

    E-Print Network [OSTI]

    Urquiza, Eugenio

    2009-01-01

    intermediate heat exchanger used high pressure helium not asexchanger performance: predictive model for heat transfer and pressurePressure Drop Correlations for the Rectangular Offset Strip Fin Compact Heat Exchanger. ”

  14. Merger-driven Fueling of Active Galactic Nuclei: Six Dual and Offset Active Galactic Nuclei Discovered with Chandra and Hubble Space Telescope Observations

    E-Print Network [OSTI]

    Comerford, Julia M; Barrows, R Scott; Greene, Jenny E; Zakamska, Nadia L; Madejski, Greg M; Cooper, Michael C

    2015-01-01

    Dual active galactic nuclei (AGNs) and offset AGNs are kpc-scale separation supermassive black holes pairs created during galaxy mergers, where both or one of the black holes are AGNs, respectively. These dual and offset AGNs are valuable probes of the link between mergers and AGNs but are challenging to identify. Here we present Chandra/ACIS observations of 12 optically-selected dual AGN candidates at z dual AGN system with separation of 2.2 kpc, where the two stellar bulges have coincident [O III] and X-ray sources. This system is an extremely minor merger (460:1) that may include a dwarf galaxy hosting an intermediate mass black hole. We also find six single AGNs, and five systems that are either dual or offset AGNs with separations dual AGNs and dual/offset AGNs are in ongoing major mergers, a...

  15. Fracture Detection using Amplitude versus Offset and Azimuth Analysis of a 3D P-wave Seismic Dataset and Synthetic Examples

    E-Print Network [OSTI]

    Minsley, Burke J.

    2004-05-26

    Amplitude versus offset (AVO) analysis of seismic reflection data has been a successful tool in describing changes in rock properties along a reflector. This method is extended to azimuthal AVO (AVOA) in order to characterize ...

  16. Cosmic slowing down of acceleration for several dark energy parametrizations

    SciTech Connect (OSTI)

    Magaña, Juan; Cárdenas, Víctor H.; Motta, Verónica, E-mail: juan.magana@uv.cl, E-mail: victor.cardenas@uv.cl, E-mail: veronica.motta@uv.cl [Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Avda. Gran Bretaña 1111, Valparaíso (Chile)

    2014-10-01

    We further investigate slowing down of acceleration of the universe scenario for five parametrizations of the equation of state of dark energy using four sets of Type Ia supernovae data. In a maximal probability analysis we also use the baryon acoustic oscillation and cosmic microwave background observations. We found the low redshift transition of the deceleration parameter appears, independently of the parametrization, using supernovae data alone except for the Union 2.1 sample. This feature disappears once we combine the Type Ia supernovae data with high redshift data. We conclude that the rapid variation of the deceleration parameter is independent of the parametrization. We also found more evidence for a tension among the supernovae samples, as well as for the low and high redshift data.

  17. Tailoring the slow light behavior in terahertz metasurfaces

    E-Print Network [OSTI]

    Manjappa, Manukumara; Cong, Longqing; Bettiol, Andrew A; Zhang, Weili; Singh, Ranjan

    2015-01-01

    We experimentally study the effect of near field coupling on the transmission of light in terahertz metasurfaces, possessing slightly distinctive SRR resonances. Our results show that the interplay between the strengths of electric and magnetic dipoles, modulates the amplitude of resulting electromagnetically induced transmission, probed under different types of asymmetries in the coupled system. We employ a two-particle model to theoretically study the influence of the near field coupling between bright and quasi-dark modes on the transmission properties of the coupled system and we find an excellent agreement with our observed results. Adding to the enhanced transmission characteristics, our results provide a deeper insight into the metamaterial analogues of atomic electromagnetically induced transparency and offer an approach to engineer slow light devices, broadband filters and attenuators at terahertz frequencies.

  18. Predicted roles of defects on band offsets and energetics at CIGS (Cu(In,Ga)Se2/CdS) solar cell interfaces and implications for improving performance

    E-Print Network [OSTI]

    Goddard III, William A.

    Predicted roles of defects on band offsets and energetics at CIGS (Cu(In,Ga)Se2/CdS) solar cell (2014) Predicted roles of defects on band offsets and energetics at CIGS (Cu(In,Ga)Se2/CdS) solar cell ZnO sputtering on the performance of Cu(In,Ga)Se2 thin film solar cells Appl. Phys. Lett. 105, 083906

  19. Many-body instabilities and mass generation in slow Dirac materials...

    Office of Scientific and Technical Information (OSTI)

    Many-body instabilities and mass generation in slow Dirac materials Citation Details In-Document Search This content will become publicly available on June 30, 2016 Title:...

  20. Fast and Slow Dynamics of Malaria and the S-gene Frequency

    E-Print Network [OSTI]

    Sci Publ Svcs (Chennai India) 4507 2000 Jan 05 15:06:23

    2004-12-10

    and the separation of the fast and slow equations, along with the appli- cation of ...... (1999). The role of red blood cell polymorphisms in resistance and suscepti-.

  1. Rapid growth in CO2 emissions after the 2008-2009 global financial crisis

    SciTech Connect (OSTI)

    Peters, Glen P.; Marland, Gregg; Le Quere, Corinne; Boden, Thomas A; Canadell, Josep; Raupach, Michael

    2011-01-01

    Global carbon dioxide emissions from fossil-fuel combustion and cement production grew 5.9% in 2010, surpassed 9 Pg of carbon (Pg C) for the first time, and more than offset the 1.4% decrease in 2009. The impact of the 2008 2009 global financial crisis (GFC) on emissions has been short-lived owing to strong emissions growth in emerging economies, a return to emissions growth in developed economies, and an increase in the fossil-fuel intensity of the world economy.

  2. A policy synthesis approach for slowing global warming

    SciTech Connect (OSTI)

    Timilsina, G.R.

    1996-12-31

    Global warming is a burning environmental issue today but confronting with subjective as well as policy conflicts. The findings of various studies indicate that developed countries that are capable of affording effective measures towards the global warming mitigation have fewer incentives for doing so because they will have a minimal damage from global warming. The developing countries, although they will have greater damage, are unlikely to divert their development budget for taking preventive actions towards global warming. The only solution in this situation is to design a policy that encourages all the nation in the world to participate in the programs for slowing global warming. Without active participation of all nations, it seems unlikely to reduce the global warming problem in an effective way. This study presents a qualitative policy recommendation extracted from a comprehensive analysis of the findings of several studies conducted so far in this field. This study has categorized the policy approaches for mitigating the global warming in three groups: Engineering approach, forestry approach and economic approach.

  3. Experimental Investigation of the Root Cause Mechanism and Effectiveness of Mitigating Actions for Axial Offset Anomaly in Pressurized Water Reactors

    SciTech Connect (OSTI)

    Said Abdel-Khalik

    2005-07-02

    Axial offset anomaly (AOA) in pressurized water reactors refers to the presence of a significantly larger measured negative axial offset deviation than predicted by core design calculations. The neutron flux depression in the upper half of high-power rods experiencing significant subcooled boiling is believed to be caused by the concentration of boron species within the crud layer formed on the cladding surface. Recent investigations of the root-cause mechanism for AOA [1,2] suggest that boron build-up on the fuel is caused by precipitation of lithium metaborate (LiBO2) within the crud in regions of subcooled boiling. Indirect evidence in support of this hypothesis was inferred from operating experience at Callaway, where lithium return and hide-out were, respectively, observed following power reductions and power increases when AOA was present. However, direct evidence of lithium metaborate precipitation within the crud has, heretofore, not been shown because of its retrograde solubility. To this end, this investigation has been undertaken in order to directly verify or refute the proposed root-cause mechanism of AOA, and examine the effectiveness of possible mitigating actions to limit its impact in high power PWR cores.

  4. Exponential energy growth in adiabatically changing Hamiltonian Systems

    E-Print Network [OSTI]

    Tiago Pereira; Dmitry Turaev

    2014-10-07

    Fermi acceleration is the process of energy transfer from massive objects in slow motion to light objects that move fast. The model for such process is a time-dependent Hamiltonian system. As the parameters of the system change with time, the energy is no longer conserved, which makes the acceleration possible. One of the main problems is how to generate a sustained and robust energy growth. We show that the non-ergodicity of any chaotic Hamiltonian system must universally lead to the exponential growth of energy at a slow periodic variation of parameters. We build a model for this process in terms of a Geometric Brownian Motion with a positive drift, and relate it to the entropy increase.

  5. Method for solid state crystal growth

    DOE Patents [OSTI]

    Nolas, George S.; Beekman, Matthew K.

    2013-04-09

    A novel method for high quality crystal growth of intermetallic clathrates is presented. The synthesis of high quality pure phase crystals has been complicated by the simultaneous formation of both clathrate type-I and clathrate type-II structures. It was found that selective, phase pure, single-crystal growth of type-I and type-II clathrates can be achieved by maintaining sufficient partial pressure of a chemical constituent during slow, controlled deprivation of the chemical constituent from the primary reactant. The chemical constituent is slowly removed from the primary reactant by the reaction of the chemical constituent vapor with a secondary reactant, spatially separated from the primary reactant, in a closed volume under uniaxial pressure and heat to form the single phase pure crystals.

  6. SPIN-DEPENDENT SCATTERING LENGTHS OF SLOW NEUTRONS WITH NUCLEI BY PSEUDOMAGNETIC MEASUREMENTS

    E-Print Network [OSTI]

    Boyer, Edmond

    L-263 SPIN-DEPENDENT SCATTERING LENGTHS OF SLOW NEUTRONS WITH NUCLEI BY PSEUDOMAGNETIC MEASUREMENTS vu par les noyaux. Abstract. - The spin-dependent scattering length of slow neutrons by the nuclei 23 can be of practical importance in many thermal neutron scattering experiments. A new method, called

  7. A SIMPLE CLOSURE APPROXIMATION FOR SLOW DYNAMICS OF A MULTISCALE SYSTEM: NONLINEAR AND

    E-Print Network [OSTI]

    Abramov, Rafail

    A SIMPLE CLOSURE APPROXIMATION FOR SLOW DYNAMICS OF A MULTISCALE SYSTEM: NONLINEAR response, multiscale systems, nonlinear coupling AMS subject classifications. 37M, 37N 1. Introduction slow and fast variables of the system. Many closure methods were designed for multiscale dynamical

  8. Stopping of Light by the Dynamic Tuning of Photonic Crystal Slow Light Device

    E-Print Network [OSTI]

    Baba, Toshihiko

    Stopping of Light by the Dynamic Tuning of Photonic Crystal Slow Light Device Yuji Saito1-cho, Chiyodaku, Tokyo 102-0075, Japan *baba@ynu.ac.jp Abstract: We propose a simple technique of stopping light pulses using a slow-light device based on photonic crystal coupled waveguide (PCCW). Dynamically tuning

  9. Title of Document: STUDIES OF HIGH FREQUENCY WAVE EXCITATION IN FAST AND SLOW WAVE

    E-Print Network [OSTI]

    Anlage, Steven

    ABSTRACT Title of Document: STUDIES OF HIGH FREQUENCY WAVE EXCITATION IN FAST AND SLOW WAVE VACUUM of Electrical and Computer Engineering and Department of Physics THz and millimeter-wave length radiation are considered: the reduction in bunching efficiency in orotrons (a slow wave device), and the excitation

  10. Low-threshold bistability of slow light in photonic-crystal waveguides

    E-Print Network [OSTI]

    for achieving bistability and all-optical switching at ultralow powers in the slow-light regime. We show-crystal waveguide side coupled to a Kerr nonlinear cavity, and demonstrate how to design the structure geometry at the resonant frequency and thus grows indefinitely in the slow-light regime. Accordingly, the power threshold

  11. Narrow coronal holes in Yohkoh soft X-ray images and the slow solar wind

    E-Print Network [OSTI]

    California at Berkeley, University of

    Narrow coronal holes in Yohkoh soft X-ray images and the slow solar wind C.N. Arge , K.L. Harvey of this phenomenon, and have found several candidates. From observations of the associated solar wind, and from modeling, we find these regions to be sources of slow solar wind. INTRODUCTION The solar wind arguably

  12. Lead Slowing-Down Spectrometry Analysis of Data from Measurements on Nuclear Fuel

    E-Print Network [OSTI]

    Danon, Yaron

    PR EPR IN T Lead Slowing-Down Spectrometry Analysis of Data from Measurements on Nuclear Fuel Glen://dx.doi.org/10.13182/NSE13-71 Abstract ­ Improved nondestructive assay of isotopic masses in used nuclear fuel, and reprocessing of used nuclear fuel. Our collaboration is examining the feasibility of using lead slowing

  13. A fast grain-growth mechanism revealed in nanocrystalline ceramic-oxides

    SciTech Connect (OSTI)

    Aidhy, Dilpuneet S; Zhang, Yanwen; Weber, William J

    2014-01-01

    Grain growth problem in nanocrystalline ceramic-oxides renders their highly attractive properties practically unusable due to limited understanding on the underlying grain growth mechanisms. Two conventional 'slow' grain-growth mechanisms, i.e., curvature-driven and grainrotation driven, are shown to be thermally active, and the discovery of a 'fast' disorder-driven mechanism is revealed using molecular dynamics simulation on nanocrystalline ceria, in conjunction with experimental observations. We elucidate that this disorder mechanism drives the unexpected fast grain growth observed experimentally during synthesis and irradiation conditions.

  14. Hydrodynamic Correlations slow down Crystallization of Soft Colloids

    E-Print Network [OSTI]

    Roehm, Dominic; Arnold, Axel

    2013-01-01

    Crystallization is often assumed to be a quasi-static process that is unaffected by details of particle transport other than the bulk diffusion coefficient. Therefore colloidal suspensions are frequently argued to be an ideal toy model for experimentally more difficult systems such as metal melts. In this letter, we want to challenge this assumption. To this aim, we have considered molecular dynamics simulations of the crystallization in a suspension of Yukawa-type colloids. In order to investigate the role of hydrodynamic interactions (HIs) mediated by the solvent, we modeled the solvent both implicitly and explicitly, using Langevin dynamics and the fluctuating Lattice Boltzmann method, respectively. Our simulations show a dramatic reduction of the crystal growth velocity due to HIs even at moderate hydrodynamic coupling. A detailed analysis shows that this slowdown is due to the wall-like properties of the crystal surface, which reduces the colloidal diffusion towards the crystal surface by hydrodynamic sc...

  15. Electronic properties of InP (001)/HfO{sub 2} (001) interface: Band offsets and oxygen dependence

    SciTech Connect (OSTI)

    KC, Santosh; Dong, Hong; Longo, Roberto C.; Xiong, Ka [Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080 (United States); Wang, Weichao [Department of Electronics and Microelectronics and Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology, Nankai University, Tianjin 300071 (China); Wallace, Robert M.; Cho, Kyeongjae, E-mail: kjcho@utdallas.edu [Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080 (United States); Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080 (United States)

    2014-01-14

    Using ab-initio methods, atomic structures and electronic properties of InP (001)/HfO{sub 2} (001) interface are studied within the framework of density functional theory. We examine the InP/HfO{sub 2} model interface electronic structures under varying oxidation conditions. The effects of indium and phosphorous concentrations on interfacial bonding, defect states, band offsets, and the thermodynamic stability at the interface are also investigated. The origin of interfacial gap states in InP (001)/HfO{sub 2} (001) interface are proposed, mainly from the P-rich oxides, which is validated by our experimental work. This highlights the importance of surface passivation prior to high-? deposition based on the in situ spectroscopic results of atomic layer deposition of HfO{sub 2} on InP.

  16. Slow light of an amplitude modulated Gaussian pulse in electromagnetically induced transparency medium

    E-Print Network [OSTI]

    Wenzhuo Tang; Bin Luo; Yu Liu; Hong Guo

    2009-01-20

    The slow light effects of an amplitude modulated Gaussian (AMG) pulse in a cesium atomic vapor are presented. In a single-$\\Lambda$ type electromagnetically induced transparency (EIT) medium, more severe distortion is observed for an AMG pulse than a Gaussian one. Using Fourier spectrum analysis, we find that the distortion, as well as the loss, is dominantly caused by linear absorption than dispersion. Accordingly, a compensation method is proposed to reshape the slow light pulse based on the transmission spectrum. In addition, we find a novel way to obtain simultaneous slow and fast light.

  17. Precision study of critical slowing down in lattice simulations of the CP^{N-1} model

    E-Print Network [OSTI]

    Jonathan Flynn; Andreas Juttner; Andrew Lawson; Francesco Sanfilippo

    2015-04-23

    With the aim of studying the relevance and properties of critical slowing down in Monte Carlo simulations of lattice quantum field theories we carried out a high precision numerical study of the discretised two-dimensional CP^{N-1} model at N=10 using an over-heat bath algorithm. We identify critical slowing down in terms of slowly-evolving topological modes and present evidence that other observables couple to these slow modes. This coupling is found to reduce however as we increase the physical volume in which we simulate.

  18. Tunable temporal gap based on simultaneous fast and slow light in electro-optic photonic crystals

    E-Print Network [OSTI]

    Li, Guangzhen; Jiang, Haowei; Liu, Yi'an; Liu, Xiao; Chen, Xianfeng

    2015-01-01

    We demonstrated a tunable temporal gap based on simultaneous fast and slow light in electro-optic photonic crystals. The light experiences an anomalous dispersion near the transmission center and a normal dispersion away from the center, where it can be accelerated and slowed down, respectively. We also obtained the switch between fast and slow light by adjusting the external electric filed. The observed largest temporal gap is 541 ps, which is crucial in practical event operation inside the gap. The results offer a new solution for temporal cloak.

  19. The Homeowner Revolution: Democracy, Land Use and the Los Angeles Slow-Growth Movement, 1965-1992

    E-Print Network [OSTI]

    Morrow, Gregory D.

    2013-01-01

    environmental protection, the Hillside Beyond issues of scale and politics,issues are better explained as a politics of space of the environmental

  20. The Homeowner Revolution: Democracy, Land Use and the Los Angeles Slow-Growth Movement, 1965-1992

    E-Print Network [OSTI]

    Morrow, Gregory D.

    2013-01-01

    Cities: Responding to Peak Oil and Climate Change.consciousness. Reaching peak oil (crossing fuel cells and aCities: Responding to Peak Oil and Climate Change (

  1. The Homeowner Revolution: Democracy, Land Use and the Los Angeles Slow-Growth Movement, 1965-1992

    E-Print Network [OSTI]

    Morrow, Gregory D.

    2013-01-01

    Crude: The Political War Over Palisades Beverly Ridge was a 300-acre subdivision and golf course in the No Oil,

  2. The Homeowner Revolution: Democracy, Land Use and the Los Angeles Slow-Growth Movement, 1965-1992

    E-Print Network [OSTI]

    Morrow, Gregory D.

    2013-01-01

    burden tidelands oil and dry gas revenues to finance RTDfinance the system proved more helpful. In 1968, the Club of Southern California, Western Oil and

  3. The Homeowner Revolution: Democracy, Land Use and the Los Angeles Slow-Growth Movement, 1965-1992

    E-Print Network [OSTI]

    Morrow, Gregory D.

    2013-01-01

    from oil sands to “fracking” for natural tidal) account forhorizontal fracturing or “fracking”) to extend the space has

  4. The Homeowner Revolution: Democracy, Land Use and the Los Angeles Slow-Growth Movement, 1965-1992

    E-Print Network [OSTI]

    Morrow, Gregory D.

    2013-01-01

    Recommendations Due on West Valley Zoning,” Los Angeles THERezoning Guide OKd for West Valley Core,” Los Angeles Times,Bottom-Up Planning West Valley The Rise of Environmentalism

  5. The Homeowner Revolution: Democracy, Land Use and the Los Angeles Slow-Growth Movement, 1965-1992

    E-Print Network [OSTI]

    Morrow, Gregory D.

    2013-01-01

    neighborhoods are “park poor”; 13 industry firms to the Sanaerospace industry in Woodland Hills/Canoga Park. Valley. “Park – to have its own economic base, included industry (

  6. Chars produced by slow pyrolysis and hydrothermal carbonization vary in carbon sequestration potential and greenhouse gases emissions

    E-Print Network [OSTI]

    Malghani, S; Malghani, S; Gleixner, G; Trumbore, SE

    2013-01-01

    of slow and fast pyrolysis biochar on soil C and N turnoverpyrolysis and hydrothermal carbonisation of corn stover. Soilmatter. Slow pyrolysis char is more stable in soil and had

  7. Quadratic voltage profiles in lead acid cells during slow, steady processes 

    E-Print Network [OSTI]

    Haaser, Robert Anthony

    1999-01-01

    It is standard lore that the voltage profile varies linearly in space within the electrolyte of a lead acid cell under slow, steady discharge. However, this hypothesis has never been put to the test. A recent theory predicts ...

  8. Velocity Augmentation of a Supersonic Source and The Production of Slow, Cold, Molecular Beams 

    E-Print Network [OSTI]

    Sheffield, Les

    2015-02-16

    In this thesis I describe the second generation of a rotating supersonic beam source. The purpose of this device is to produce velocity augmented molecular beams for use with scattering experiments or subsequent slowing methods. The beam emerges...

  9. Efficient tunable switch from slow light to fast light in quantum opto-electromechanical system

    E-Print Network [OSTI]

    Akram, M Javed; Saif, Farhan

    2015-01-01

    The control of slow and fast light propagation, in the probe transmission in a single experiment, is a challenging task. This type of control can only be achieved through highly nonlinear interactions and additional interfering pathway(s), which is therefore seldom reported. Here, we devise a scheme in which slow light, and a tunable switch from slow light to fast light can be achieved in the probe transmission based on a hybrid setup, which is composed of an optical cavity with two charged nano mechanical resonators (MRs). The two MRs are electrostatically coupled via tunable Coulomb coupling strength ($g_{c}$) making a quantum opto-electromechanical system (QOEMS). The parameter $g_{c}$ that couples the two MRs can be switched on and off by controlling the bias voltages on the MRs, and acts as a tunable switch that allows the propagation of transmitted probe field as slow light ($g_{c} \

  10. Efficient tunable switch from slow light to fast light in quantum opto-electromechanical system

    E-Print Network [OSTI]

    M. Javed Akram; Khalid Naseer; Farhan Saif

    2015-03-05

    The control of slow and fast light propagation, in the probe transmission in a single experiment, is a challenging task. This type of control can only be achieved through highly nonlinear interactions and additional interfering pathway(s), which is therefore seldom reported. Here, we devise a scheme in which slow light, and a tunable switch from slow light to fast light can be achieved in the probe transmission based on a hybrid setup, which is composed of an optical cavity with two charged nano mechanical resonators (MRs). The two MRs are electrostatically coupled via tunable Coulomb coupling strength ($g_{c}$) making a quantum opto-electromechanical system (QOEMS). The parameter $g_{c}$ that couples the two MRs can be switched on and off by controlling the bias voltages on the MRs, and acts as a tunable switch that allows the propagation of transmitted probe field as slow light ($g_{c} \

  11. Auxiliary material for Observation of the Spread of Slow Deformation in Greece Following the

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Auxiliary material for Observation of the Spread of Slow Deformation in Greece Following of Engineering Seismology and Earthquake Engineering ITSAK, P.O. Box 53, 55102 Thessaloniki, Greece 4 Université

  12. SLOW MAGNETOACOUSTIC WAVES OBSERVED ABOVE A QUIET-SUN REGION IN A DARK CAVITY

    SciTech Connect (OSTI)

    Liu Jiajia; Zhou Zhenjun; Wang Yuming; Liu Rui; Liao Chijian; Shen Chenglong; Zheng Huinan; Miao Bin; Su Zhenpeng; Wang, S.; Wang Bin E-mail: ymwang@ustc.edu.cn

    2012-10-20

    Waves play a crucial role in diagnosing the plasma properties of various structures in the solar corona and coronal heating. Slow magnetoacoustic (MA) waves are one of the important types of magnetohydrodynamic waves. In past decades, numerous slow MA waves were detected above active regions and coronal holes, but were rarely found elsewhere. Here, we investigate a 'tornado'-like structure consisting of quasi-periodic streaks within a dark cavity at about 40-110 Mm above a quiet-Sun region on 2011 September 25. Our analysis reveals that these streaks are actually slow MA wave trains. The properties of these wave trains, including phase speed, compression ratio, and kinetic energy density, are similar to those of the reported slow MA waves, except that the period of these waves is about 50 s, much shorter than the typical reported values (3-5 minutes).

  13. Mechanisms of Slow Lead and Nickel Sorption Kinetics on Y-AI2O3 and Pyrophyllite

    E-Print Network [OSTI]

    Sparks, Donald L.

    Mechanisms of Slow Lead and Nickel Sorption Kinetics on Y-AI2O3 and Pyrophyllite D. G. Strawn, A. M is commonly associated with adsorption. For the slow sorption reaction of heavy metals three mechanisms have three of these reaction mechanisms occur simultaneously. Such slow reactions are often neglected

  14. 100 GS/s / 100 GS/s All-Optical Analog-to-Digital Conversion utilizing Slow Light Structure

    E-Print Network [OSTI]

    Park, Namkyoo

    100 GS/s / 100 GS/s All-Optical Analog-to-Digital Conversion utilizing Slow Light Structure-to-digital conversion based on photonic crystal slow light structure. To achieve high speed modulation and compensate inducing dual channels are suggested, which have the unit cells composed of coupled resonators. (Slow

  15. 15STOCHASTIC SCREENING:WHAT TO DO WHENYOUR RIP DOESN'T SUPPORT IT AND COMPARISON WITH CONVENTIONAL SCREENING ON AN OFFSET PRESS

    E-Print Network [OSTI]

    Fleming, Paul D. "Dan"

    SCREENING ON AN OFFSET PRESS Introduction: AM and FM screening take two totally different approaches"diffusiondither"arealsooftenusedtodescribethisprocess. This paper shows the on-press production of both AM and FM screened images,simultaneously,from the same plates and on the same press sheets. In addition, we show that FM, or stochasticallyscreenedimages

  16. Variation in band offsets at ZnO/Sn:In2O3 (ITO) heterojunctions measured by x-ray photoelectron spectroscopy

    SciTech Connect (OSTI)

    Kaspar, Tiffany C.; Droubay, Timothy C.

    2012-07-01

    Rational design and optimization of efficient photovoltaics requires fundamental knowledge of both the materials properties of the individual components and the conduction and valence band alignments at the materials interfaces. Efficient collection of electrons photogenerated in the absorber material requires a small or zero conduction band offset at both the absorber/n-type semiconductor and the n-type semiconductor/electrode interfaces. Negative conduction band offsets result in an energy barrier to electron injection, while large positive conduction band offsets (a “cliff” arrangement) result in too much energy lost during injection. However, it is difficult to predict heterojunction band offsets from bulk materials properties. Experimental band alignments of semiconductor heterojunctions rarely conform to the Anderson model,1 which assumes the band alignments are determined solely by differences in the electron affinity of the two semiconductors. Chemical bonds at the heterojunction interface give rise to an interfacial dipole which influences the interfacial band alignment. Thus, the complex interplay between electron affinity differences, Fermi level matching, interface-induced gap states, and band bending determine heterojunction band alignments.2-5 Band alignments can also be modified by doping, point defects, or control of non-stoichiometry at the interface; since these parameters can be affected by processing conditions, they offer a mechanism to modify the band alignments of a given heterojunction system.

  17. "Carbon emission offsets for aviation-generated emissions due to international travel to and from New Zealand" revised personal version of paper to appear in Energy Policy (in

    E-Print Network [OSTI]

    Otago, University of

    New Zealand" ­ revised personal version of paper to appear in Energy Policy (in press 20 December 2008 to be included in post-Kyoto arrangements. In the absence of international collective action, a number of so-called carbon offsetting schemes have emerged that allow individual travellers and companies to compensate

  18. The precision of slow-roll predictions for the CMBR anisotropies

    E-Print Network [OSTI]

    Jerome Martin; Dominik Schwarz

    2000-05-25

    Inflationary predictions for the anisotropy of the cosmic microwave background radiation (CMBR) are often based on the slow-roll approximation. We study the precision with which the multipole moments of the temperature two-point correlation function can be predicted by means of the slow-roll approximation. We ask whether this precision is good enough for the forthcoming high precision observations by means of the MAP and Planck satellites. The error in the multipole moments due to the slow-roll approximation is demonstrated to be bigger than the error in the power spectrum. For power-law inflation with $n_S=0.9$ the error from the leading order slow-roll approximation is $\\approx 5%$ for the amplitudes and $\\approx 20%$ for the quadrupoles. For the next-to-leading order the errors are within a few percent. The errors increase with $|n_S - 1|$. To obtain a precision of 1% it is necessary, but in general not sufficient, to use the next-to-leading order. In the case of power-law inflation this precision is obtained for the spectral indices if $|n_S - 1| < 0.02$ and for the quadrupoles if $|n_S - 1| < 0.15$ only. The errors in the higher multipoles are even larger than those for the quadrupole, e.g. $\\approx 15%$ for l=100, with $n_S = 0.9$ at the next-to-leading order. We find that the accuracy of the slow-roll approximation may be improved by shifting the pivot scale of the primordial spectrum (the scale at which the slow-roll parameters are fixed) into the regime of acoustic oscillations. Nevertheless, the slow-roll approximation cannot be improved beyond the next-to-leading order in the slow-roll parameters.

  19. Slow Light of an Amplitude Modulated Gaussian Pulse in Cesium Vapor

    E-Print Network [OSTI]

    Wenzhuo Tang; Bin Luo; Yu Liu; Hong Guo

    2009-08-26

    Slow light of an amplitude modulated Gaussian (AMG) pulse in cesium vapor is demonstrated and studied, as an appropriate amplitude modulation to a single pulse can expand its spectrum and thus increase the utilization efficiency of the bandwidth of a slow light system. In a single-$\\Lambda$ type electromagnetically induced transparency (EIT) system, the slowed AMG pulse experiences severe distortion, mainly owing to the frequency dependent transmission of medium. Additionally, due to its spectral distribution, the frequency dependent dispersion of the medium causes simultaneous slow and fast light of different spectral components and thus a certain dispersive distortion of the AMG pulse. Further, a post-processing method is proposed to recover the slowed (distorted) pulse, which indicates that by introducing a linear optical system with a desired gain spectrum we can recover the pulse in an "all-optical" way. Finally, we discuss the limitations during this compensation procedure in detail. Although it is demonstrated in the cesium vapor using EIT, this method should be applicable to a wide range of slow light systems.

  20. Technology Policy and Economic Growth

    E-Print Network [OSTI]

    Borrus, Michael; Stowsky, Jay

    1997-01-01

    economic growth) and the Pentagon’s Technology Reinvestment20 Tassey, Technology and Economic Growth: Implications forTechnology Policy and Economic Growth Michael Borrus Jay

  1. The influence of four iron oxide forms on the growth of grain sorghum seedlings 

    E-Print Network [OSTI]

    Rich, Pat Albert

    1959-01-01

    . . ~ . . . . . . 38 I NT RO DUCT ION Chloresis of grain sorghuw aad other wewbers of the grass fawily has been a serious problea ia the Rio Qraade Plain area of Texas for waay years. One of the principal soils of this area oa which ohlorotic plants are frequeatly..., therefore, to deteraiae the role of foar iroa oxides, iaogaetite, heastite, syatbetio aagaetite, aad syathetie waghewite, os soaroes of iron oad the offsets of these iroa oxides oa the sheiaiool eoayositioa aad growth of grata sorghaia seedliags. agglgg...

  2. Channelization architecture for wide-band slow light in atomic vapors

    E-Print Network [OSTI]

    Zachary Dutton; Mark Bashkansky; Michael Steiner; John Reintjes

    2005-10-20

    We propose a ``channelization'' architecture to achieve wide-band electromagnetically induced transparency (EIT) and ultra-slow light propagation in atomic Rb-87 vapors. EIT and slow light are achieved by shining a strong, resonant ``pump'' laser on the atomic medium, which allows slow and unattenuated propagation of a weaker ``signal'' beam, but only when a two-photon resonance condition is satisfied. Our wideband architecture is accomplished by dispersing a wideband signal spatially, transverse to the propagation direction, prior to entering the atomic cell. When particular Zeeman sub-levels are used in the EIT system, then one can introduce a magnetic field with a linear gradient such that the two-photon resonance condition is satisfied for each individual frequency component. Because slow light is a group velocity effect, utilizing differential phase shifts across the spectrum of a light pulse, one must then introduce a slight mismatch from perfect resonance to induce a delay. We present a model which accounts for diffusion of the atoms in the varying magnetic field as well as interaction with levels outside the ideal three-level system on which EIT is based. We find the maximum delay-bandwidth product decreases with bandwidth, and that delay-bandwidth product ~1 should be achievable with bandwidth ~50 MHz (~5 ns delay). This is a large improvement over the ~1 MHz bandwidths in conventional slow light systems and could be of use in signal processing applications.

  3. Pathological scattering by a defect in a slow-light medium

    E-Print Network [OSTI]

    Stephen P. Shipman; Aaron T. Welters

    2014-10-04

    Scattering of electromagnetic fields by a defect layer embedded in a slow-light periodically layered ambient medium exhibits phenomena markedly different from typical scattering problems. In a slow-light medium, constructed by Figotin and Vitebskiy, the energy velocity of a propagating mode in one direction slows to zero, creating a "frozen mode" at a single frequency within a pass band, where the dispersion relation possesses a flat inflection point. The slow-light regime is characterized by a $3\\!\\times\\!3$ Jordan block of the log of the $4\\!\\times\\!4$ monodromy matrix for EM fields in a periodic medium at special frequency and parallel wavevector. The scattering problem breaks down as the 2D rightward and leftward mode spaces intersect in the frozen mode and therefore span only a 3D subspace $\\mathring V$ of the 4D space of EM fields. Analysis of pathological scattering near the slow-light frequency and wavevector is based on the interaction between the flux-unitary transfer matrix $T$ across the defect layer and the projections to the rightward and leftward spaces, which blow up as Laurent-Puiseux series. Two distinct cases emerge: the generic, non-resonant case when $T$ does not map $\\mathring V$ to itself and the quadratically growing mode is excited; and the resonant case, when $\\mathring V$ is invariant under $T$ and a guided frozen mode is resonantly excited.

  4. Existence domains of slow and fast ion-acoustic solitons in two-ion space plasmas

    SciTech Connect (OSTI)

    Maharaj, S. K.; Bharuthram, R.; Singh, S. V. Lakhina, G. S.

    2015-03-15

    A study of large amplitude ion-acoustic solitons is conducted for a model composed of cool and hot ions and cool and hot electrons. Using the Sagdeev pseudo-potential formalism, the scope of earlier studies is extended to consider why upper Mach number limitations arise for slow and fast ion-acoustic solitons. Treating all plasma constituents as adiabatic fluids, slow ion-acoustic solitons are limited in the order of increasing cool ion concentrations by the number densities of the cool, and then the hot ions becoming complex valued, followed by positive and then negative potential double layer regions. Only positive potentials are found for fast ion-acoustic solitons which are limited only by the hot ion number density having to remain real valued. The effect of neglecting as opposed to including inertial effects of the hot electrons is found to induce only minor quantitative changes in the existence regions of slow and fast ion-acoustic solitons.

  5. Conduction band offset at GeO{sub 2}/Ge interface determined by internal photoemission and charge-corrected x-ray photoelectron spectroscopies

    SciTech Connect (OSTI)

    Zhang, W. F.; Nishimula, T.; Nagashio, K.; Kita, K.; Toriumi, A.

    2013-03-11

    We report a consistent conduction band offset (CBO) at a GeO{sub 2}/Ge interface determined by internal photoemission spectroscopy (IPE) and charge-corrected X-ray photoelectron spectroscopy (XPS). IPE results showed that the CBO value was larger than 1.5 eV irrespective of metal electrode and substrate type variance, while an accurate determination of valence band offset (VBO) by XPS requires a careful correction of differential charging phenomena. The VBO value was determined to be 3.60 {+-} 0.2 eV by XPS after charge correction, thus yielding a CBO (1.60 {+-} 0.2 eV) in excellent agreement with the IPE results. Such a large CBO (>1.5 eV) confirmed here is promising in terms of using GeO{sub 2} as a potential passivation layer for future Ge-based scaled CMOS devices.

  6. Measurement of the valence band-offset in a PbSe/ZnO heterojunction by x-ray photoelectron spectroscopy

    SciTech Connect (OSTI)

    Li Lin; Qiu Jijun; Weng Binbin; Yuan Zijian; Shi Zhisheng [School of Electrical and Computer Engineering, University of Oklahoma, Norman, Oklahoma 73019 (United States); Li Xiaomin; Gan Xiaoyan [State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); Sellers, Ian R. [Deparment of Physics, University of Oklahoma, Norman, Oklahoma 73019 (United States)

    2012-12-24

    A heterojunction of PbSe/ZnO has been grown by molecular beam epitaxy. X-ray photoelectron spectroscopy was used to directly measure the valence-band offset (VBO) of the heterojunction. The VBO, {Delta}E{sub V}, was determined as 2.51 {+-} 0.05 eV using the Pb 4p{sup 3/2} and Zn 2p{sup 3/2} core levels as a reference. The conduction-band offset, {Delta}E{sub C}, was, therefore, determined to be 0.59 {+-} 0.05 eV based on the above {Delta}E{sub V} value. This analysis indicates that the PbSe/ZnO heterojunction forms a type I (Straddling Gap) heterostructure.

  7. COMMISSIONING RESULTS OF SLOW EXTRACTION OF HEAVY IONS FROM THE AGS BOOSTER.

    SciTech Connect (OSTI)

    Brown, K A; Bellavia, S; Binello, S; Brelsford, B; Dumont, D; Eng, W; Gardner, G; Gassner, D; Glenn, J W; Hammons, L; Hock, J; Hoff, L; Hutchinson, E; Jamilkowski, J; Kling, N; Kotlyar, Y; Krishock, A; Lockey, R; Mapes, M; Marneris, I; Marr, G; McNerney, A; Meyer, A; Morris, J; Naylor, C; Nemesure, S; Phillips, D; Rusek, A; Ryan, J; Shrey, T; Snydstrup, L; Tsoupas, N; Vankuik, B; Zahariou-Cohen, K

    2003-05-12

    Brookhaven's AGS Booster has been modified to deliver slow extracted beam to a new beam line, the NASA Space Radiation Laboratory (NSRL). This facility was constructed in collaboration with NASA for the purpose of performing radiation effect studies for the NASA space program. The design of the resonant extraction system has been described in [1]. A more detailed description, which includes predictions of the slow extracted beam time structure has been described in [2]. In this report we will present results of the system commissioning and performance.

  8. Slow dynamics of nanocomposite polymer aerogels as revealed by X-ray photocorrelation spectroscopy (XPCS)

    SciTech Connect (OSTI)

    Hernández, Rebeca, E-mail: rhernandez@ictp.csic.es, E-mail: aurora.nogales@csic.es; Mijangos, Carmen [Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, Juan de la Cierva, 3, 28006 Madrid (Spain)] [Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, Juan de la Cierva, 3, 28006 Madrid (Spain); Nogales, Aurora, E-mail: rhernandez@ictp.csic.es, E-mail: aurora.nogales@csic.es; Ezquerra, Tiberio A. [Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid (Spain)] [Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid (Spain); Sprung, Michael [Petra III at DESY, Notkestr. 85, 22607 Hamburg (Germany)] [Petra III at DESY, Notkestr. 85, 22607 Hamburg (Germany)

    2014-01-14

    We report on a novel slow dynamics of polymer xerogels, aerogels, and nanocomposite aerogels with iron oxide nanoparticles, as revealed by X-ray photon correlation spectroscopy. The polymer aerogel and its nanocomposite aerogels, which are porous in nature, exhibit hyper-diffusive dynamics at room temperature. In contrast, non-porous polymer xerogels exhibit an absence of this peculiar dynamics. This slow dynamical process has been assigned to a relaxation of the characteristic porous structure of these materials and not to the presence of nanoparticles.

  9. Stability islands in domains of separatrix crossings in slow-fast Hamiltonian systems

    E-Print Network [OSTI]

    Anatoly Neishtadt; Carles Simó; Dmitri Treschev; Alexei Vasiliev

    2006-11-16

    We consider a 2 d.o.f. Hamiltonian system with one degree of freedom corresponding to fast motion and the other corresponding to slow motion. The ratio of the time derivatives of slow and fast variables is of order $0island whose measure is estimated from below by a value of order $\\eps$. Thus, the total measure of the stability islands is estimated from below by a value independent of $\\eps$. The proof is based on an analysis of the asymptotic formulas for the corresponding Poincar\\'e map.

  10. Enhanced four-wave mixing in graphene-silicon slow-light photonic crystal waveguides

    SciTech Connect (OSTI)

    Zhou, Hao E-mail: tg2342@columbia.edu; Gu, Tingyi E-mail: tg2342@columbia.edu McMillan, James F.; Wong, Chee Wei E-mail: tg2342@columbia.edu; Petrone, Nicholas; Zande, Arend van der; Hone, James C.; Yu, Mingbin; Lo, Guoqiang; Kwong, Dim-Lee; Feng, Guoying; Zhou, Shouhuan

    2014-09-01

    We demonstrate the enhanced four-wave mixing of monolayer graphene on slow-light silicon photonic crystal waveguides. 200-?m interaction length, a four-wave mixing conversion efficiency of ?23?dB is achieved in the graphene-silicon slow-light hybrid, with an enhanced 3-dB conversion bandwidth of about 17?nm. Our measurements match well with nonlinear coupled-mode theory simulations based on the measured waveguide dispersion, and provide an effective way for all-optical signal processing in chip-scale integrated optics.

  11. Large Offset Press 

    E-Print Network [OSTI]

    Unknown

    2011-08-17

    and Constraint Conditions ........................................... 20 2.3.2 Flexural Rigidity ........................................................................ 25 2.4 Vibration Analyses... and shear webs construction [4] ..................... 9 1.6 Architecture of computational blade model [11,30,31] ................................ 11 2.1 Boundary conditions for static analyses in the blade models ........................ 21 2.2 (a...

  12. Strategic Growth Initiative (Michigan)

    Broader source: Energy.gov [DOE]

    A joint venture between Michigan Department of Agriculture and Rural Development (MDARD) and the Michigan Economic Development Corporation (MEDC), the Strategic Growth Initiative Grant Program was...

  13. Time dependent crack growth in polyethylene: characterizing the da/dt = AKn dependence and the effects of Igepal 

    E-Print Network [OSTI]

    Slay, Jeremy Buc

    1999-01-01

    slow crack growth (SCG) rate as a function of stress intensity. Constant load single-edge-notch bend (SENB) tests commonly know as ''three point bend'' tests have been performed on deeply notched specimens. The load-line displacement as a function...

  14. PUBLISHED ONLINE: 2 NOVEMBER 2014 | DOI: 10.1038/NGEO2284 Plant growth enhancement by elevated CO2

    E-Print Network [OSTI]

    Thomas, David D.

    by elevated CO2 eliminated by joint water and nitrogen limitation Peter B. Reich1,2 *, Sarah E. Hobbie3 and Tali D. Lee4 Rising atmospheric CO2 concentrations can fertilize plant growth. The resulting increased plant uptake of CO2 could, in turn, slow increases in atmospheric CO2 levels and associated climate

  15. Cooling and Trapping Atoms Atoms are slowed and cooled by radiation pressure from laser light

    E-Print Network [OSTI]

    Johannesson, Henrik

    Cooling and Trapping Atoms Atoms are slowed and cooled by radiation pressure from laser light and then trapped in a bottle whose "walls" are magnetic fields. Cooled atoms are ideal for exploring basic. Atoms can now be cooled by shining laser light directly on them. The radiation pres sure exerted

  16. ON QUASI-ELASTIC SCATTERING OF SLOW NEUTRONS IN MOLECULAR LIQUIDS

    E-Print Network [OSTI]

    Boyer, Edmond

    L-317 ON QUASI-ELASTIC SCATTERING OF SLOW NEUTRONS IN MOLECULAR LIQUIDS M. UTSURO Research Reactor de neutrons avec élargissement par rotation moléculaire dans le liquide sont étudiés dans le cadre du du benzène liquide. Abstract. 2014 The rotational broadened quasi-elastic scattering spectrum

  17. Slow light engineering for high Q high sensitivity photonic crystal microcavity biosensors in silicon

    E-Print Network [OSTI]

    Texas at Austin, University of

    Slow light engineering for high Q high sensitivity photonic crystal microcavity biosensors Keywords: Photonic crystal microcavity Biosensor Nanophotonic biosensor a b s t r a c t Current trends in photonic crystal microcavity biosensors in silicon-on-insulator (SOI), that focus on small and smaller

  18. Original Article The slow and fast life histories of early birds and night owls

    E-Print Network [OSTI]

    Maestripieri, Dario

    ., 2005), and are sexually dimorphic, as men tend to be overrepresented among evening types (Randler, 2007 & Bausback, 2010; Roenneberg et al., 2004) and, similarly to other sexually dimorphic traits, may be underOriginal Article The slow and fast life histories of early birds and night owls: their future

  19. Wide-Bandwidth, Tunable, Multiple-Pulse-Width Optical Delays Using Slow Light in Cesium Vapor

    E-Print Network [OSTI]

    Boyd, Robert W.

    Wide-Bandwidth, Tunable, Multiple-Pulse-Width Optical Delays Using Slow Light in Cesium Vapor Ryan) We demonstrate an all-optical delay line in hot cesium vapor that tunably delays 275 ps input pulses to 80 pulse widths by making use of a double absorption reso- nance in cesium. Furthermore, we show

  20. Price Incentives for Fuel Switching: Did Price Differences Slow the Phase-Out of Leaded

    E-Print Network [OSTI]

    California at Berkeley. University of

    the potential e®ects of price incentives on the fuel switching process. In the U.S., these e®ects have beenPWP-010 Price Incentives for Fuel Switching: Did Price Differences Slow the Phase-Out of Leaded on Workable Energy Regulation (POWER). POWER is a program of the University of California Energy Institute

  1. Outage Probability for Free-Space Optical Systems Over Slow Fading Channels With Pointing Errors

    E-Print Network [OSTI]

    Hranilovic, Steve

    Outage Probability for Free-Space Optical Systems Over Slow Fading Channels With Pointing Errors, Canada. Email: farid@grads.ece.mcmaster.ca, hranilovic@mcmaster.ca Abstract-- We investigate the outage errors. An expression for the outage probability is derived and we show that optimizing the transmit- ted

  2. Dynamic control of slow water transport by aquaporin 0: Implications for hydration

    E-Print Network [OSTI]

    Shaw, David E.

    Dynamic control of slow water transport by aquaporin 0: Implications for hydration and junction as the primary water channel in this tissue but also appears to mediate the formation of thin junctions between fiber cells. AQP0 is remarkably less water perme- able than other aquaporins, but the structural basis

  3. Different Motor Neuron Spike Patterns Produce Contractions With Very Similar Rises in Graded Slow Muscles

    E-Print Network [OSTI]

    Hooper, Scott

    Different Motor Neuron Spike Patterns Produce Contractions With Very Similar Rises in Graded Slow December 2006 Hooper SL, Guschlbauer C, von Uckermann G, Bu¨schges A. Differ- ent motor neuron spike twitches in response to individual motor neuron spikes. During the early part of their contractions

  4. When Bacteria Talk: Time Elapse Communication for Super-Slow Networks

    E-Print Network [OSTI]

    Sivakumar, Raghupathy

    When Bacteria Talk: Time Elapse Communication for Super-Slow Networks Bhuvana Krishnaswamy a Escherichia coli bacteria serving as the communication receiver that a simple modulation like on-off keying- ically bio-inspired) for use in biological applications [3]­[5]. In recent years, bacteria have emerged

  5. Measurements with the high flux lead slowing-down spectrometer at LANL

    E-Print Network [OSTI]

    Danon, Yaron

    slow down by scattering interactions with the lead and thus enable measurements of neutron) 397]. The LSDS is comprised of a cube of pure lead 1.2 m on the side, with a spallation pulsed neutronA, pulse widths of 0.05­0.25 ls and a repetition rate of 20­40 Hz. Spallation neutrons are created

  6. Tunable microwave photonic phase shifter based on slow and fast light effects in

    E-Print Network [OSTI]

    Yao, Jianping

    Tunable microwave photonic phase shifter based on slow and fast light effects in a tilted fiber Bragg grating Hiva Shahoei and Jianping Yao* Microwave Photonics Research Laboratory, School@eecs.uottawa.ca http://www.eecs.uottawa.ca/~jpyao Abstract: A continuously tunable microwave phase shifter based

  7. Synthesis and characterization of poly (amino ester) for slow biodegradable gene delivery vector

    E-Print Network [OSTI]

    Park, Jong-Sang

    tertiary amine-linkage and abundant surface hydroxyl groups that enable good 0968-0896/$ - see front matter to include inner tertiary amines and outer primary amines. Self-assembly with DNA resulted in the production of serum. The polymers showed a relatively slow degradability for an amine-containing ester polymer

  8. Slow-Rate Utility-Based Resource Allocation in Wireless Networks

    E-Print Network [OSTI]

    Berry, Randall

    1 Slow-Rate Utility-Based Resource Allocation in Wireless Networks Peijuan Liu, Randall Berry are specified via a utility function that depends on the received data rate. The allocation of power across users is studied, where this allocation may depend on both a user's channel and utility. The objective

  9. Capillary-Gravity Waves Generated by a Slow Moving Object A. D. Chepelianskii,1,2

    E-Print Network [OSTI]

    Raphael, Elie

    Capillary-Gravity Waves Generated by a Slow Moving Object A. D. Chepelianskii,1,2 F. Chevy,3 and E=2 . The dispersive nature of capillary-gravity waves is responsible for the complicated wave pattern generated) or an external pressure source [2­6]. Since the disturbance expends a power to generate these waves

  10. Dynamic Wavelength Conversion in Copropagating Slow-Light Pulses K. Kondo and T. Baba

    E-Print Network [OSTI]

    Baba, Toshihiko

    -8501, Japan (Received 16 December 2013; published 6 June 2014) Dynamic wavelength conversion (DWC) is obtained. Dispersion-engineered Si photonic crystal waveguides produce such slow-light pulses. Free carriers generated that differs from nonlinear processes, such as parametric four-wave mixing and Kerr-based cross

  11. Client-Controlled Slow TCP and Denial of Service Songlin Cai, Yong Liu, Weibo Gong

    E-Print Network [OSTI]

    Liu, Yong

    Client-Controlled Slow TCP and Denial of Service Songlin Cai, Yong Liu, Weibo Gong Abstract of TCP connections available at the server S. Cai and W. Gong are with Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, MA 01003 (scai, gong@ecs.umass.edu) Y. Liu

  12. Observation of the spread of slow deformation in Greece following the breakup of the slab

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Observation of the spread of slow deformation in Greece following the breakup of the slab Virginie Engineering, ITSAK, Thessaloniki, Greece, 4 Université de Savoie, ISTerre, Le Bourget du Lac, France, 5 analyze here a "storm" of earthquakes in Greece and show that their interaction provides remarkable

  13. Slow convergence of the BEM with constant elements in solving beam bending problems

    E-Print Network [OSTI]

    Liu, Yijun

    beam bending problems. This paper presents some BEM results with large-scale 2D models of simple beamSlow convergence of the BEM with constant elements in solving beam bending problems Y.J. Liu n , Y online 13 November 2013 Keywords: Boundary element method Constant element Beam bending problem a b s t r

  14. perovskite phase suggests slow longitudinal elastic-wave velocities propagating along the

    E-Print Network [OSTI]

    Hansell, Dennis

    perovskite phase suggests slow longitudinal elastic-wave velocities propagating along the [010] direction. In addition, it is also inferred that the post-perovskite phase forms a platy crystal habit) observed in the D region (1, 2) is possibly caused by the preferred orientation of the post-perovskite

  15. January 9, 2004 Radio Observations of Rapid Acceleration in a Slow Filament Eruption/Fast

    E-Print Network [OSTI]

    White, Stephen

    January 9, 2004 Radio Observations of Rapid Acceleration in a Slow Filament Eruption/Fast CME Event, Navrang-pura, Ahmedabad-380009, India ABSTRACT We discuss a filament eruption/coronal mass ejection (CME was observed by the Nobeyama RadioHeliograph (NoRH) at 17 and 34 GHz. NoRH ob- serves the filament during its

  16. Systematic notes on the Philippine slow loris, Nycticebus coucang menagensis (Lydekker, 1893) (Primates: Lorisidae)

    E-Print Network [OSTI]

    Timm, Robert M.; Birney, Elmer C.

    1992-12-01

    The slow loris described as menagensis (genus Nycticebus), which was collected as part of the Menage Scientific Expedition to the Philippines in the early 1890s by Frank S. Bourns and Dean C. Worcester, has had a wide variety of problems associated...

  17. Pine sawlog markets remained slow. Pulp-wood and hardwood sawlog prices declined

    E-Print Network [OSTI]

    logging conditions and downward pressure from rising energy costs. Diesel prices soared 22 percent over by the end of April, mainly driven by higher energy and food prices. Middle East turmoil, rising demand fromPine sawlog markets remained slow. Pulp- wood and hardwood sawlog prices declined due to favorable

  18. Sun to 1 AU propagation and evolution of a slow streamerblowout coronal mass ejection

    E-Print Network [OSTI]

    California at Berkeley, University of

    Click Here for Full Article Sun to 1 AU propagation and evolution of a slow streamerblowout coronal was directed 40° East of the SunEarth line and the Heliospheric Imager observations are consistent with the CME. Thernisien, E. Robbrecht, G. H. Fisher, J. G. Luhmann, and A. Vourlidas (2010), Sun to 1 AU propagation

  19. Ultrahigh-Intensity Optical Slow-Wave Structure B. D. Layer,1,3

    E-Print Network [OSTI]

    Milchberg, Howard

    current laser energy and side leakage. Hydrogen and argon plasma wave- guides up to 1.5 cm in lengthUltrahigh-Intensity Optical Slow-Wave Structure B. D. Layer,1,3 A. York,1,3 T. M. Antonsen,2,3 S and Technology, University of Maryland, College Park, Maryland 20742, USA 2 Department of Electrical and Computer

  20. Biomaterials 27 (2006) 22922301 Highly effective and slow-biodegradable network-type cationic gene

    E-Print Network [OSTI]

    Park, Jong-Sang

    2006-01-01

    Biomaterials 27 (2006) 2292­2301 Highly effective and slow-biodegradable network-type cationic gene ARTICLE IN PRESS www.elsevier.com/locate/biomaterials 0142-9612/$ - see front matter r 2005 Elsevier Ltd. All rights reserved. doi:10.1016/j.biomaterials.2005.10.023 ÃCorresponding author. Tel.: +82 2 880

  1. Neoproterozoic tectonothermal evolution of the Central Eastern Desert, Egypt: a slow velocity tectonic process

    E-Print Network [OSTI]

    Fritz, Harald

    Neoproterozoic tectonothermal evolution of the Central Eastern Desert, Egypt: a slow velocity, University of Assiut, Egypt Received 10 January 2001; received in revised form 24 October 2001; accepted 25 in the Central Eastern Desert of Egypt is constraint by 40 Ar/39 Ar ages of hornblende and muscovite from Meatiq

  2. Pine sawlog markets remained slow and prices were flat to slightly lower. Dry

    E-Print Network [OSTI]

    Pine sawlog markets remained slow and prices were flat to slightly lower. Dry weather brought price prices averaged $28.36 per ton, 5 percent lower than the last period. This was 36% higher than the price a year ago. The average pine sawlog price was $26.51 per ton for Northeast Texas and $30.23 per ton

  3. Rethinking Query Processing for Energy Efficiency: Slowing Down to Win the Race

    E-Print Network [OSTI]

    Patel, Jignesh

    Rethinking Query Processing for Energy Efficiency: Slowing Down to Win the Race Willis Lang of an energy efficiency metric along with traditional performance metrics. This change is fueled by the growing, real, and urgent demand for energy-efficient database processing. Database query processing engines

  4. Tensor to scalar ratio and large scale power suppression from pre-slow roll initial conditions

    SciTech Connect (OSTI)

    Lello, Louis; Boyanovsky, Daniel, E-mail: lal81@pitt.edu, E-mail: boyan@pitt.edu [Department of Physics and Astronomy, University of Pittsburgh, 3941 O'Hara St, Pittsburgh, PA 15260 (United States)

    2014-05-01

    We study the corrections to the power spectra of curvature and tensor perturbations and the tensor-to-scalar ratio r in single field slow roll inflation with standard kinetic term due to initial conditions imprinted by a ''fast-roll'' stage prior to slow roll. For a wide range of initial inflaton kinetic energy, this stage lasts only a few e-folds and merges smoothly with slow-roll thereby leading to non-Bunch-Davies initial conditions for modes that exit the Hubble radius during slow roll. We describe a program that yields the dynamics in the fast-roll stage while matching to the slow roll stage in a manner that is independent of the inflationary potentials. Corrections to the power spectra are encoded in a ''transfer function'' for initial conditions T{sub ?}(k), P{sub ?}(k) = P{sup BD}{sub ?}(k)T{sub ?}(k), implying a modification of the ''consistency condition'' for the tensor to scalar ratio at a pivot scale k{sub 0}: r(k{sub 0}) = ?8n{sub T}(k{sub 0}) [T{sub T}(k{sub 0})/T{sub R}(k{sub 0})]. We obtain T{sub ?}(k) to leading order in a Born approximation valid for modes of observational relevance today. A fit yields T{sub ?}(k) = 1+A{sub ?}k{sup ?p}cos [2??k/H{sub sr}+?{sub ?}], with 1.5?slow roll inflation, where curvature and tensor perturbations feature the same p,? for a wide range of initial conditions. These corrections lead to both a suppression of the quadrupole and oscillatory features in both P{sub R}(k) and r(k{sub 0}) with a period of the order of the Hubble scale during slow roll inflation. The results are quite general and independent of the specific inflationary potentials, depending solely on the ratio of kinetic to potential energy ? and the slow roll parameters ?{sub V}, ?{sub V} to leading order in slow roll. For a wide range of ? and the values of ?{sub V}; ?{sub V} corresponding to the upper bounds from Planck, we find that the low quadrupole is consistent with the results from Planck, and the oscillations in r(k{sub 0}) as a function of k{sub 0} could be observable if the modes corresponding to the quadrupole and the pivot scale crossed the Hubble radius very few (2–3) e-folds after the onset of slow roll. We comment on possible impact on the recent BICEP2 results.

  5. Magnetohydrodynamic slow mode with drifting He{sup ++}: Implications for coronal seismology and the solar wind

    SciTech Connect (OSTI)

    Hollweg, Joseph V.; Verscharen, Daniel; Chandran, Benjamin D. G. E-mail: daniel.verscharen@unh.edu

    2014-06-10

    The MHD slow mode wave has application to coronal seismology, MHD turbulence, and the solar wind where it can be produced by parametric instabilities. We consider analytically how a drifting ion species (e.g. He{sup ++}) affects the linear slow mode wave in a mainly electron-proton plasma, with potential consequences for the aforementioned applications. Our main conclusions are as follows. 1. For wavevectors highly oblique to the magnetic field, we find solutions that are characterized by very small perturbations of total pressure. Thus, our results may help to distinguish the MHD slow mode from kinetic Alfvén waves and non-propagating pressure-balanced structures, which can also have very small total pressure perturbations. 2. For small ion concentrations, there are solutions that are similar to the usual slow mode in an electron-proton plasma, and solutions that are dominated by the drifting ions, but for small drifts the wave modes cannot be simply characterized. 3. Even with zero ion drift, the standard dispersion relation for the highly oblique slow mode cannot be used with the Alfvén speed computed using the summed proton and ion densities, and with the sound speed computed from the summed pressures and densities of all species. 4. The ions can drive a non-resonant instability under certain circumstances. For low plasma beta, the threshold drift can be less than that required to destabilize electromagnetic modes, but damping from the Landau resonance can eliminate this instability altogether, unless T{sub e} /T{sub p} >> 1.

  6. Slowing of vortex rings by development of Kelvin waves Robert E. Hershberger, Diogo Bolster, and Russell J. Donnelly*

    E-Print Network [OSTI]

    Bolster, Diogo

    , at least for a straight vortex tube case, results from subjection to a straining field in a planeSlowing of vortex rings by development of Kelvin waves Robert E. Hershberger, Diogo Bolster the slowing of viscous vortex rings. In particular we do so using the concept of drag coefficient, which

  7. Slow Magnetic Relaxation in a Trigonal Prismatic Uranium(III) Complex Jeffrey D. Rinehart and Jeffrey R. Long*

    E-Print Network [OSTI]

    Slow Magnetic Relaxation in a Trigonal Prismatic Uranium(III) Complex Jeffrey D. Rinehart and Jeffrey R. Long* Department of Chemistry, UniVersity of California, Berkeley, California 94720 Herein, we show that a simple trigonal prismatic uranium(III) complex can indeed display slow magnetic

  8. Determinants of Population Growth in Rajasthan: An Analysis

    E-Print Network [OSTI]

    V. V. Singh; Alka Mittal; Neetish Sharma; Florentin Smarandache

    2010-12-01

    Rajasthan is the biggest State of India and is currently in the second phase of demographic transition and is moving towards the third phase of demographic transition with very slow pace. However, state's population will continue to grow for a time period. Rajasthan's performance in the social and economic sector has been poor in past. The poor performance is the outcome of poverty, illiteracy and poor development, which co-exist and reinforce each other. There are many demographic and socio-economic factors responsible for population growth. This paper attempts to identify the demographic and socio-economic variables, which are responsible for population growth in Rajasthan with the help of multivariate analysis.

  9. Modeling tin whisker growth.

    SciTech Connect (OSTI)

    Weinberger, Christopher Robert

    2013-08-01

    Tin, lead, and lead-tin solders are the most commonly used solders due to their low melting temperatures. However, due to the toxicity problems, lead must now be removed from solder materials. This has lead to the re-emergence of the issue of tin whisker growth. Tin whiskers are a microelectronic packaging issue because they can lead to shorts if they grow to sufficient length. However, the cause of tin whisker growth is still not well understood and there is lack of robust methods to determine when and if whiskering will be a problem. This report summarizes some of the leading theories on whisker growth and attempts to provide some ideas towards establishing the role microstructure plays in whisker growth.

  10. Renewable Energy Growth Program

    Broader source: Energy.gov [DOE]

    In 2014, Act H 7727 created the Renewable Energy Growth (REG) program with the goal to promote installation of grid connected renewable energy within the load zones of electric distribution...

  11. Robust Growth Determinants

    E-Print Network [OSTI]

    Doppelhofer, Gernot; Weeks, Melvyn

    2011-01-31

    growth in European regions, allowing for spa- tial spillovers across regions. The robust model averaging approach can also account for spatial clustering of errors by accommodating outliers and heteroscedastic errors. In both Classical and Bayesian...

  12. FGF growth factor analogs

    DOE Patents [OSTI]

    Zamora, Paul O. (Gaithersburg, MD); Pena, Louis A. (Poquott, NY); Lin, Xinhua (Plainview, NY); Takahashi, Kazuyuki (Germantown, MD)

    2012-07-24

    The present invention provides a fibroblast growth factor heparin-binding analog of the formula: ##STR00001## where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, X, Y and Z are as defined, pharmaceutical compositions, coating compositions and medical devices including the fibroblast growth factor heparin-binding analog of the foregoing formula, and methods and uses thereof.

  13. On the Source of Propagating Slow Magneto-acoustic Waves in Sunspots

    E-Print Network [OSTI]

    Prasad, S Krishna; Khomenko, Elena

    2015-01-01

    Recent high-resolution observations of sunspot oscillations using simultaneously operated ground- and space-based telescopes reveal the intrinsic connection between different layers of the solar atmosphere. However, it is not clear whether these oscillations are externally driven or generated in-situ. We address this question by using observations of propagating slow magneto-acoustic waves along a coronal fan loop system. In addition to the generally observed decreases in oscillation amplitudes with distance, the observed wave amplitudes are also found to be modulated with time, with similar variations observed throughout the propagation path of the wavetrain. Employing multi-wavelength and multi-instrument data we study the amplitude variations with time as the waves propagate through different layers of the solar atmosphere. By comparing the amplitude-modulation period in different layers, we find that slow magneto-acoustic waves observed in sunspots are externally driven by photospheric p-modes, which prop...

  14. Model reduction for slow–fast stochastic systems with metastable behaviour

    SciTech Connect (OSTI)

    Bruna, Maria, E-mail: bruna@maths.ox.ac.uk [Mathematical Institute, University of Oxford, Oxford OX2 6GG (United Kingdom) [Mathematical Institute, University of Oxford, Oxford OX2 6GG (United Kingdom); Computational Science Laboratory, Microsoft Research, Cambridge CB1 2FB (United Kingdom); Chapman, S. Jonathan [Mathematical Institute, University of Oxford, Oxford OX2 6GG (United Kingdom)] [Mathematical Institute, University of Oxford, Oxford OX2 6GG (United Kingdom); Smith, Matthew J. [Computational Science Laboratory, Microsoft Research, Cambridge CB1 2FB (United Kingdom)] [Computational Science Laboratory, Microsoft Research, Cambridge CB1 2FB (United Kingdom)

    2014-05-07

    The quasi-steady-state approximation (or stochastic averaging principle) is a useful tool in the study of multiscale stochastic systems, giving a practical method by which to reduce the number of degrees of freedom in a model. The method is extended here to slow–fast systems in which the fast variables exhibit metastable behaviour. The key parameter that determines the form of the reduced model is the ratio of the timescale for the switching of the fast variables between metastable states to the timescale for the evolution of the slow variables. The method is illustrated with two examples: one from biochemistry (a fast-species-mediated chemical switch coupled to a slower varying species), and one from ecology (a predator–prey system). Numerical simulations of each model reduction are compared with those of the full system.

  15. Modelling of Reflective Propagating Slow-mode Wave in a Flaring Loop

    E-Print Network [OSTI]

    Fang, X; Van Doorsselaere, T; Keppens, R; Xia, C

    2015-01-01

    Quasi-periodic propagating intensity disturbances have been observed in large coronal loops in EUV images over a decade, and are widely accepted to be slow magnetosonic waves. However, spectroscopic observations from Hinode/EIS revealed their association with persistent coronal upflows, making this interpretation debatable. We perform a 2.5D magnetohydrodynamic simulation to imitate the chromospheric evaporation and the following reflected patterns in a flare loop. Our model encompasses the corona, transition region, and chromosphere. We demonstrate that the quasi periodic propagating intensity variations captured by the synthesized \\textit{Solar Dynamics Observatory}/Atmospheric Imaging Assembly (AIA) 131, 94~\\AA~emission images match the previous observations well. With particle tracers in the simulation, we confirm that these quasi periodic propagating intensity variations consist of reflected slow mode waves and mass flows with an average speed of 310 km/s in an 80 Mm length loop with an average temperatu...

  16. Observation of slow light in the noise spectrum of a vertical external cavity surface emitting laser

    E-Print Network [OSTI]

    A. El Amili; B. -X. Miranda; F. Goldfarb; G. Baili; G. Beaudoin; I. Sagnes; F. Bretenaker; M. Alouini

    2010-10-27

    The role of coherent population oscillations is evidenced in the noise spectrum of an ultra-low noise lasers. This effect is isolated in the intensity noise spectrum of an optimized single-frequency vertical external cavity surface emitting laser. The coherent population oscillations induced by the lasing mode manifest themselves through their associated dispersion that leads to slow light effects probed by the spontaneous emission present in the non-lasing side modes.

  17. Optimal transport of two ions under slow spring-constant drifts

    E-Print Network [OSTI]

    Xiao-Jing Lu; Mikel Palmero; Andreas Ruschhaupt; Xi Chen; Juan Gonzalo Muga

    2015-02-05

    We investigate the effect of slow spring-constant drifts of the trap used to shuttle two ions of different mass. We design transport protocols to suppress or mitigate the final excitation energy by applying invariant-based inverse engineering, perturbation theory, and a harmonic dynamical normal-mode approximation. A simple, explicit trigonometric protocol for the trap trajectory is found to be robust with respect to the spring-constant drifts.

  18. Slow Feature Analysis on Retinal Waves Leads to V1 Complex Cells

    E-Print Network [OSTI]

    Wiskott, Laurenz

    Slow Feature Analysis on Retinal Waves Leads to V1 Complex Cells Sven Da¨hne1,2,3 *, Niko Wilbert2 such that it is best prepared for coding input from the natural world. Citation: Da¨hne S, Wilbert N, Wiskott L (2014 Received June 25, 2013; Accepted December 20, 2013; Published May 8, 2014 Copyright: ß 2014 Da¨hne et al

  19. Effective Low-Energy Gravitational Potential for Slow Fermions Coupled to Linearised Massive Gravity

    E-Print Network [OSTI]

    Ivanov, A N; Wellenzohn, M

    2015-01-01

    We analyse the Dirac equation for slow fermions coupled to linearised massive gravity above the Minkowski background and derive the effective low-energy gravitational potential. The obtained results can be used in terrestrial laboratories for the detection of gravitational waves and fluxes of massive gravitons emitted by cosmological objects. We also calculate the neutron spin precession within linearised massive gravity, which in principle can be measured by neutron interferometers.

  20. Why is GDP growth linear?

    E-Print Network [OSTI]

    Becker, Jörg D

    2015-01-01

    In many European countries the growth of the real GDP per capita has been linear since 1950. An explanation for this linearity is still missing. We propose that in artificial intelligence we may find models for a linear growth of performance. We also discuss possible consequences of the fact that in systems with linear growth the percentage growth goes to zero.

  1. Residential Electricity Demand in China -- Can Efficiency Reverse the Growth?

    SciTech Connect (OSTI)

    Letschert, Virginie; McNeil, Michael A.; Zhou, Nan

    2009-05-18

    The time when energy-related carbon emissions come overwhelmingly from developed countries is coming to a close. China has already overtaken the United States as the world's leading emitter of greenhouse gas emissions. The economic growth that China has experienced is not expected to slow down significantly in the long term, which implies continued massive growth in energy demand. This paper draws on the extensive expertise from the China Energy Group at LBNL on forecasting energy consumption in China, but adds to it by exploring the dynamics of demand growth for electricity in the residential sector -- and the realistic potential for coping with it through efficiency. This paper forecasts ownership growth of each product using econometric modeling, in combination with historical trends in China. The products considered (refrigerators, air conditioners, fans, washing machines, lighting, standby power, space heaters, and water heating) account for 90percent of household electricity consumption in China. Using this method, we determine the trend and dynamics of demandgrowth and its dependence on macroeconomic drivers at a level of detail not accessible by models of a more aggregate nature. In addition, we present scenarios for reducing residential consumption through efficiency measures defined at the product level. The research takes advantage of an analytical framework developed by LBNL (BUENAS) which integrates end use technology parameters into demand forecasting and stock accounting to produce detailed efficiency scenarios, thus allowing for a technologically realistic assessment of efficiency opportunities specifically in the Chinese context.

  2. Monitoring CO2 Storage at Cranfield, Mississippi with Time-Lapse Offset VSP – Using Integration and Modeling to Reduce Uncertainty

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

    Daley, Thomas M.; Hendrickson, Joel; Queen, John H.

    2014-12-31

    A time-lapse Offset Vertical Seismic Profile (OVSP) data set was acquired as part of a subsurface monitoring program for geologic sequestration of CO2. The storage site at Cranfield, near Natchez, Mississippi, is part of a detailed area study (DAS) site for geologic carbon sequestration operated by the U.S. Dept. of Energy’s Southeast Regional Carbon Sequestration Partnership (SECARB). The DAS site includes three boreholes, an injection well and two monitoring wells. The project team selected the DAS site to examine CO2 sequestration multiphase fluid flow and pressure at the interwell scale in a brine reservoir. The time-lapse (TL) OVSP was partmore »of an integrated monitoring program that included well logs, crosswell seismic, electrical resistance tomography and 4D surface seismic. The goals of the OVSP were to detect the CO2 induced change in seismic response, give information about the spatial distribution of CO2 near the injection well and to help tie the high-resolution borehole monitoring to the 4D surface data. The VSP data were acquired in well CFU 31-F1, which is the ~3200 m deep CO2 injection well at the DAS site. A preinjection survey was recorded in late 2009 with injection beginning in December 2009, and a post injection survey was conducted in Nov 2010 following injection of about 250 kT of CO2. The sensor array for both surveys was a 50-level, 3-component, Sercel MaxiWave system with 15 m (49 ft) spacing between levels. The source for both surveys was an accelerated weight drop, with different source trucks used for the two surveys. Consistent time-lapse processing was applied to both data sets. Time-lapse processing generated difference corridor stacks to investigate CO2 induced reflection amplitude changes from each source point. Corridor stacks were used for amplitude analysis to maximize the signal-to-noise ratio (S/N) for each shot point. Spatial variation in reflectivity (used to ‘map’ the plume) was similar in magnitude to the corridor stacks but, due to relatively lower S/N, the results were less consistent and more sensitive to processing and therefore are not presented. We examined the overall time-lapse repeatability of the OVSP data using three methods, the NRMS and Predictability (Pred) measures of Kragh and Christie (2002) and the signal-to-distortion ratio (SDR) method of Cantillo (2011). Because time-lapse noise was comparable to the observed change, multiple methods were used to analyze data reliability. The reflections from the top and base reservoir were identified on the corridor stacks by correlation with a synthetic response generated from the well logs. A consistent change in the corridor stack amplitudes from pre- to post-CO2 injection was found for both the top and base reservoir reflections on all ten shot locations analyzed. In addition to the well-log synthetic response, a finite-difference elastic wave propagation model was built based on rock/fluid properties obtained from well logs, with CO2 induced changes guided by time-lapse crosswell seismic tomography (Ajo-Franklin, et al., 2013) acquired at the DAS site. Time-lapse seismic tomography indicated that two reservoir zones were affected by the flood. The modeling established that interpretation of the VSP trough and peak event amplitudes as reflectivity from the top and bottom of reservoir is appropriate even with possible tuning effects. Importantly, this top/base change gives confidence in an interpretation that these changes arise from within the reservoir, not from bounding lithology. The modeled time-lapse change and the observed field data change from 10 shotpoints are in agreement for both magnitude and polarity of amplitude change for top and base of reservoir. Therefore, we conclude the stored CO2 has been successfully detected and, furthermore, the observed seismic reflection change can be applied to Cranfield’s 4D surface seismic for spatially delineating the CO2/brine interface.« less

  3. Chars produced by slow pyrolysis and hydrothermal carbonization vary in carbon sequestration potential and greenhouse gases emissions

    E-Print Network [OSTI]

    Malghani, S; Gleixner, G; Trumbore, SE

    2013-01-01

    of biochar from fast pyrolysis and gasi?cation systems.Effects of slow and fast pyrolysis biochar on soil C and Ncarbonaceous products obtained by pyrolysis and hydrothermal

  4. Domestic Trauma and Colonial Guilt: A Study of Slow Violence in Dombey and Son and Bleak House

    E-Print Network [OSTI]

    Wetzel, Katherine Eileen

    2012-05-31

    In this study of Charles Dickens's Dombey and Son and Bleak House, I examine the two forms of violence that occur within the homes: slow violence through the naturalized practices of the everyday and immediate forms of ...

  5. Slowing of Magnetic Reconnection Concurrent with Weakening Plasma Inflows and Increasing Collisionality in Strongly Driven Laser-Plasma Experiments

    E-Print Network [OSTI]

    Fox, W.

    An evolution of magnetic reconnection behavior, from fast jets to the slowing of reconnection and the establishment of a stable current sheet, has been observed in strongly driven, ? ? 20 laser-produced plasma experiments. ...

  6. Journal of the Korean Physical Society, Vol. 59, No. 2, August 2011, pp. 16491653 Fission Physics and Cross Section Measurements with a Lead Slowing down

    E-Print Network [OSTI]

    Danon, Yaron

    and Cross Section Measurements with a Lead Slowing down Spectrometer Y. Danon, R. Block (emeritus), J) A Lead Slowing Down Spectrometer (LSDS) provides a high neutron flux environment that en- ables to be adjusted. PACS numbers: 25.40.-h, 25.85.Ec Keywords: ND2010, Nuclear data, Lead slowing down spectrometer

  7. New measurement of the scattering cross section of slow neutrons on liquid parahydrogen from neutron transmission

    E-Print Network [OSTI]

    K. B. Grammer; R. Alarcon; L. Barrón-Palos; D. Blyth; J. D. Bowman; J. Calarco; C. Crawford; K. Craycraft; D. Evans; N. Fomin; J. Fry; M. Gericke; R. C. Gillis; G. L. Greene; J. Hamblen; C. Hayes; S. Kucuker; R. Mahurin; M. Maldonado-Velázquez; E. Martin; M. McCrea; P. E. Mueller; M. Musgrave; H. Nann; S. I. Penttilä; W. M. Snow; Z. Tang; W. S. Wilburn

    2015-04-24

    Liquid hydrogen is a dense Bose fluid whose equilibrium properties are both calculable from first principles using various theoretical approaches and of interest for the understanding of a wide range of questions in many body physics. Unfortunately, the pair correlation function $g(r)$ inferred from neutron scattering measurements of the differential cross section $d\\sigma \\over d\\Omega$ from different measurements reported in the literature are inconsistent. We have measured the energy dependence of the total cross section and the scattering cross section for slow neutrons with energies between 0.43~meV and 16.1~meV on liquid hydrogen at 15.6~K (which is dominated by the parahydrogen component) using neutron transmission measurements on the hydrogen target of the NPDGamma collaboration at the Spallation Neutron Source at Oak Ridge National Laboratory. The relationship between the neutron transmission measurement we perform and the total cross section is unambiguous, and the energy range accesses length scales where the pair correlation function is rapidly varying. At 1~meV our measurement is a factor of 3 below the data from previous work. We present evidence that these previous measurements of the hydrogen cross section, which assumed that the equilibrium value for the ratio of orthohydrogen and parahydrogen has been reached in the target liquid, were in fact contaminated with an extra non-equilibrium component of orthohydrogen. Liquid parahydrogen is also a widely-used neutron moderator medium, and an accurate knowledge of its slow neutron cross section is essential for the design and optimization of intense slow neutron sources. We describe our measurements and compare them with previous work.

  8. Journal of Crystal Growth ] (

    E-Print Network [OSTI]

    ) at high pressure of CO2 (initial PCO2 ¼ 55 bar) and moderate to high temperature (30 and 90 1C) was used and the dissolved quantity of CO2 have a significant effect on the average particle size, specific surface areaJournal of Crystal Growth ] (

  9. The effects of unconfined slow uniform heating on the mechanical and transport properties of the westerly and charcoal granites 

    E-Print Network [OSTI]

    Bauer, Stephen Joseph

    1980-01-01

    THE EFFECTS OF UNCONFINED SLOW UNIFORM HEATING ON THE MECHANICAL AND TRANSPORT PROPERTIES OF THE WESTERLY AND CHARCOAL GRANITES A Thesis L by STEPHEN '-JOSEPH BAUER Submitted to the Graduate College of Texas A&M University in partial... JOSEPH BAUER Approved as to style and content by: (Chairs of Committee) iember) (Member) (Hea f Department) May 1980 111 ABSTRACT The Effects of Unconfined Slow Uniform Heating on the Mechanical and Transport Properties of the Westerly...

  10. Possible Diamond-Like Nanoscale Structures Induced by Slow Highly-Charged Ions on Graphite (HOPG)

    SciTech Connect (OSTI)

    Sideras-Haddad, E.; Schenkel, T.; Shrivastava, S.; Makgato, T.; Batra, A.; Weis, C. D.; Persaud, A.; Erasmus, R.; Mwakikunga, B.

    2009-01-06

    The interaction between slow highly-charged ions (SHCI) of different charge states from an electron-beam ion trap and highly oriented pyrolytic graphite (HOPG) surfaces is studied in terms of modification of electronic states at single-ion impact nanosizeareas. Results are presented from AFM/STM analysis of the induced-surface topological features combined with Raman spectroscopy. I-V characteristics for a number of different impact regions were measured with STM and the results argue for possible formation of diamond-like nanoscale structures at the impact sites.

  11. Slow-light plasmonic metamaterial based on dressed-state analog of electromagnetically-induced transparency

    E-Print Network [OSTI]

    Raza, Søren

    2015-01-01

    We consider a simple configuration for realizing one-dimensional slow-light metamaterials with large bandwidth-delay products using stub-shaped Fabry-Perot resonators as building blocks. Each metaatom gives rise to large group indices due to a classical analog of the dressed-state picture of electromagnetically-induced transparency. By connecting up to eight metaatoms, we find bandwidth-delay products over unity and group indices approaching 100. Our approach is quite general and can be applied to any type of Fabry-Perot resonators and tuned to different operating wavelengths.

  12. Lead Slowing Down Spectrometer Research Plans (Technical Report) | SciTech

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing(Journalspectroscopy of aerosols(TechnicalConnectpulseImagingConnect Slowing

  13. Effects of gravitational-wave recoil on the dynamics and growth of supermassive black holes

    E-Print Network [OSTI]

    Laura Blecha; Abraham Loeb

    2008-08-01

    Simulations of binary black hole mergers indicate that asymmetrical gravitational wave (GW) emission can cause black holes to recoil at speeds up to thousands of km/s. These GW recoil events can dramatically affect the coevolution of recoiling supermassive black holes (SMBHs) and their host galaxies. However, theoretical studies of SMBH-galaxy evolution almost always assume a stationary central black hole. In light of the numerical results on GW recoil velocities, we relax that assumption here and consider the consequences of recoil for SMBH evolution. We follow the trajectories of SMBHs ejected in a smooth background potential that includes both a stellar bulge and a multi-component gaseous disk. In addition, we calculate the accretion rate onto the SMBH as a function of time using a hybrid prescription of viscous (alpha-disk) and Bondi accretion. We find that recoil kicks between 100 km/s and the escape speed cause SMBHs to wander through the galaxy and halo for about 1 Myr - 1 Gyr before settling back to the galactic center. However, the mass accreted during this time is roughly constant at about 10% of the initial mass, independent of the recoil velocity. This indicates that while large recoils may disrupt active galactic nuclei feedback processes, recoil itself is an effective means of regulating SMBH growth. Recoiling SMBHs may be observable as spatially or kinematically offset quasars, but finding such systems could be challenging, because the largest offsets correspond to the shortest quasar lifetimes.

  14. Eco-Growth: A Framework for Sustainable Growth

    E-Print Network [OSTI]

    Blanco, Edgar E.

    Growth is imperative for corporate success and yet the environmental impact of this growth is not sustainable. In this paper we offer a framework for thinking about the stages of tackling the environmental sustainability ...

  15. Signatures of fast and slow magnetohydrodynamic shocks in turbulent molecular clouds

    E-Print Network [OSTI]

    Lehmann, Andrew

    2015-01-01

    The character of star formation is intimately related to the supersonic magnetohydrodynamic (MHD) turbulent dynamics of the giant molecular clouds in which stars form. A significant amount of the turbulent energy dissipates in low-velocity shock waves. These shocks cause molecular line cooling of the compressed and heated gas, and so their radiative signatures probe the nature of the turbulence. In MHD fluids the three distinct families of shocks---fast, intermediate and slow---differ in how they compress and heat the molecular gas, and so observational differences between them may also distinguish driving modes of turbulent regions. Here we use a two-fluid model to compare the characteristics of one-dimensional fast and slow MHD shocks propagating at low speeds (a few km/s) in molecular clouds. Fast MHD shocks are magnetically driven, forcing ion species to stream through the neutral gas ahead of the shock front. This magnetic precursor heats the gas sufficiently to create a large, warm transition zone where...

  16. Can Light Echoes Account for the Slow Decay of Type IIn Supernovae?

    E-Print Network [OSTI]

    B. Roscherr; B. E. Schaefer

    1999-09-09

    The spectra of type IIn supernovae indicate the presence of apre-existing slow, dense circumstellar wind (CSW). If the CSW extends sufficiently far from the progenitor star, then dust formation should occur in the wind. The light from the supernova explosion will scatter off this dust and produce a light echo. Continuum emission seen after the peak will have contributions from both this echo as well as from the shock of the ejecta colliding with the CSW, with a fundamental question of which source dominates the continuum. We calculate the brightness of the light echo as a function of time for a range of dust shell geometries, and use our calculations to fit to the light curves of SN 1988Z and SN 1997ab, the two slowest declining IIn supernovae on record. We find that the light curves of both objects can be reproduced by the echo model. However, their rate of decay from peak, color at peak and their observed peak absolute magnitudes when considered together are inconsistent with the echo model. Furthermore, when the observed values of M$_{B}$ are corrected for the effects of dust scattering, the values obtained imply that these supernovae have unrealistically high luminosities. We conclude that light echoes cannot properly account for the slow decline seen in some IIn's, and that the shock interaction is likely to dominate the continuum emission.

  17. Proceedings of the workshop on opportunities for atomic physics using slow, highly-charged ions

    SciTech Connect (OSTI)

    Not Available

    1987-01-01

    The study of atomic physics with highly-charged ions is an area of intense activity at the present time because of a convergence of theoretical interest and advances in experimental techniques. The purpose of the Argonne ''Workshop on Opportunities for Atomic Physics Using Slow, Highly-Charged Ions'' was to bring together atomic, nuclear, and accelerator physicists in order to identify what new facilities would be most useful for the atomic physics community. The program included discussion of existing once-through machines, advanced ion sources, recoil ion techniques, ion traps, and cooler rings. One of the topics of the Workshop was to discuss possible improvement to the ANL Tandem-Linac facility (ATLAS) to enhance the capability for slowing down ions after they are stripped to a high-charge state (the Accel/Decel technique). Another topic was the opportunity for atomic physics provided by the ECR ion source which is being built for the Uranium Upgrade of ATLAS. 18 analytics were prepared for the individual papers in this volume.

  18. One dimensional full wave analysis of slow-to-fast mode conversion in lower hybrid frequencies

    SciTech Connect (OSTI)

    Jia, Guo-Zhang; Gao, Zhe

    2014-12-15

    The linear conversion from the slow wave to the fast wave in the lower hybrid range of frequencies is analyzed numerically by using the set of field equations describing waves in a cold plane-stratified plasma. The equations are solved as a two-point boundary value problem, where the polarizations of each mode are set consistently in the boundary conditions. The scattering coefficients and the field patterns are obtained for various density profiles. It is shown that, for large density scale length, the results agree well with the traditional cognitions. In contrast, the reflected component and the probable transmitted-converted component from the conversion region, which are neglected in the usual calculations, become significant when the scale length is smaller than the wavelength of the mode. The inclusion of these new components will improve the accuracy of the simulated propagation and deposition for the injected rf power when the conversion process is involved within a sharp-varying density profile. Meanwhile, the accessibility of the incident slow wave for the low frequency case is also affected by the scale length of the density profile.

  19. Slowing down of ring polymer diffusion caused by inter-ring threading

    E-Print Network [OSTI]

    Eunsang Lee; Soree Kim; YounJoon Jung

    2015-10-20

    Diffusion of long ring polymers in a melt is much slower than the reorganization of their internal structures. While direct evidences for entanglements have not been observed in the long ring polymers unlike linear polymer melts, threading between the rings is suspected to be the main reason for slowing down of ring polymer diffusion. It is, however, difficult to define the threading configuration between two rings because the rings have no chain end. In this work, evidences for threading dynamics of ring polymers are presented by using molecular dynamics simulation and applying a novel analysis method. The simulation results are analyzed in terms of the statistics of persistence and exchange times that have proved useful in studying heterogeneous dynamics of glassy systems. We find that the threading time of ring polymer melts increases more rapidly with the degree of polymerization than that of linear polymer melts. This indicates that threaded ring polymers cannot diffuse until unthreading event occurs, which results in the slowing down of ring polymer diffusion.

  20. The Offset and Host Light Distributions of Long Gamma-Ray Bursts: A New View from HST Observations of Swift Bursts

    E-Print Network [OSTI]

    Blanchard, Peter K; Fong, Wen-fai

    2015-01-01

    [Abridged] We present the results of an extensive Hubble Space Telescope (HST) imaging study of ~100 Swift long-duration gamma-ray bursts (LGRBs) spanning 0.03 0.6 while bursts at R/R_h > 0.5 uniformly trace the light of their hosts. This indicates that the spatial correlation of LGRB locations with bright star forming regions seen in the full sample is dominated by the contribution from bursts at small offset and that LGRBs in the outer parts of galaxies show no preference for unusually bright star forming regions. We conclude that LGRBs strongly prefer the bright, inner regions of their hosts indicating that the star formation taking place there is more favorable for LGRB progenitor production. This indicates that another environmental factor beyond metallicity, such as binary interactions or IMF differences, may be operating in the central regions of LGRB hosts.

  1. Geometry of Valley Growth

    E-Print Network [OSTI]

    Petroff, Alexander P; Abrams, Daniel M; Lobkovsky, Alexander E; Kudrolli, Arshad; Rothman, Daniel H

    2011-01-01

    Although amphitheater-shaped valley heads can be cut by groundwater flows emerging from springs, recent geological evidence suggests that other processes may also produce similar features, thus confounding the interpretations of such valley heads on Earth and Mars. To better understand the origin of this topographic form we combine field observations, laboratory experiments, analysis of a high-resolution topographic map, and mathematical theory to quantitatively characterize a class of physical phenomena that produce amphitheater-shaped heads. The resulting geometric growth equation accurately predicts the shape of decimeter-wide channels in laboratory experiments, 100-meter wide valleys in Florida and Idaho, and kilometer wide valleys on Mars. We find that whenever the processes shaping a landscape favor the growth of sharply protruding features, channels develop amphitheater-shaped heads with an aspect ratio of pi.

  2. Bubble growth rates in boiling

    E-Print Network [OSTI]

    Griffith, P.

    1956-01-01

    The conditions determining the growth rate of a bubble on a surface in boiling are considered and a mathematical model framed in the light of these conditions. The growth rate is then calculated for bubbles growing under ...

  3. 1.5 Malthusian Growth

    E-Print Network [OSTI]

    PRETEX (Halifax NS) #1 1054 1999 Mar 05 10:59:16

    2010-01-20

    Feb 16, 2007 ... Logistic Population Model. The Malthusian growth law (1.5.1) does not provide an accurate model for the growth of a population over a long ...

  4. Generalized Slow Roll Conditions and the Possibility of Intermediate Scale Inflation in Scalar-Tensor Theory

    E-Print Network [OSTI]

    J. R. Morris

    2001-06-06

    Generalized slow roll conditions and parameters are obtained for a general form of scalar-tensor theory (with no external sources), having arbitrary functions describing a nonminimal gravitational coupling F(\\phi), a Kahler-like kinetic function k(\\phi), and a scalar potential V(\\phi). These results are then used to analyze a simple toy model example of chaotic inflation with a single scalar field \\phi and a standard Higgs potential and a simple gravitational coupling function. In this type of model inflation can occur with inflaton field values at an intermediate scale of roughly 10^{11} GeV when the particle physics symmetry breaking scale is approximately 1 TeV, provided that the theory is realized within the Jordan frame. If the theory is realized in the Einstein frame, however, the intermediate scale inflation does not occur.

  5. An elastic, plastic, viscous model for slow shear of a liquid foam

    E-Print Network [OSTI]

    Philippe Marmottant; François Graner

    2007-07-06

    We suggest a scalar model for deformation and flow of an amorphous material such as a foam or an emulsion. To describe elastic, plastic and viscous behaviours, we use three scalar variables: elastic deformation, plastic deformation rate and total deformation rate; and three material specific parameters: shear modulus, yield deformation and viscosity. We obtain equations valid for different types of deformations and flows slower than the relaxation rate towards mechanical equilibrium. In particular, they are valid both in transient or steady flow regimes, even at large elastic deformation. We discuss why viscosity can be relevant even in this slow shear (often called "quasi-static") limit. Predictions of the storage and loss moduli agree with the experimental literature, and explain with simple arguments the non-linear large amplitude trends.

  6. Slow down of a globally neutral relativistic $e^-e^+$ beam shearing the vacuum

    E-Print Network [OSTI]

    Alves, E P; Silveirinha, M G; Fonseca, R A; Silva, L O

    2015-01-01

    The microphysics of relativistic collisionless sheared flows is investigated in a configuration consisting of a globally neutral, relativistic $e^-e^+$ beam streaming through a hollow plasma/dielectric channel. We show through multidimensional PIC simulations that this scenario excites the Mushroom instability (MI), a transverse shear instability on the electron-scale, when there is no overlap (no contact) between the $e^-e^+$ beam and the walls of the hollow plasma channel. The onset of the MI leads to the conversion of the beam's kinetic energy into magnetic (and electric) field energy, effectively slowing down a globally neutral body in the absence of contact. The collisionless shear physics explored in this configuration may operate in astrophysical environments, particularly in highly relativistic and supersonic settings where macroscopic shear processes are stable.

  7. Impact of slow-light enhancement on optical propagation in active semiconductor photonic crystal waveguides

    E-Print Network [OSTI]

    Chen, Yaohui; Gregersen, Niels; Mørk, Jesper

    2015-01-01

    We derive and validate a set of coupled Bloch wave equations for analyzing the reflection and transmission properties of active semiconductor photonic crystal waveguides. In such devices, slow-light propagation can be used to enhance the material gain per unit length, enabling, for example, the realization of short optical amplifiers compatible with photonic integration. The coupled wave analysis is compared to numerical approaches based on the Fourier modal method and a frequency domain finite element technique. The presence of material gain leads to the build-up of a backscattered field, which is interpreted as distributed feedback effects or reflection at passive-active interfaces, depending on the approach taken. For very large material gain values, the band structure of the waveguide is perturbed, and deviations from the simple coupled Bloch wave model are found.

  8. Process Color Profiling: Syncing a Digital Press with an Offset Laura Kraft, Kate Blout, and Paul D. Fleming III; Larry Brink Printing Laboratory and Center for Ink and Printability Research,

    E-Print Network [OSTI]

    Fleming, Paul D. "Dan"

    Process Color Profiling: Syncing a Digital Press with an Offset Press Laura Kraft, Kate Blout, Michigan Abstract For both printers and clients, accurate proofs are needed before going to press. The proof should predict what the job would look like on the press. Press proofing is an integral part

  9. Jointness of Growth Determinants

    E-Print Network [OSTI]

    Doppelhofer, Gernot; Weeks, Melvyn

    2006-03-14

    @cam.ac.uk, Tel: +44 1223 335200, Fax: +44 1223 335475. ‡Faculty of Economics, University of Cambridge, Cambridge CB3 9DD, UK. Email: mw217@econ.cam.ac.uk 1 Introduction Model uncertainty is encountered in many areas of empirical work in economics... presents the empirical results for jointness of growth, and section 5 concludes. 2 Bayesian Model Averaging Consider the following general linear regression model y = X? + ? (1) where y is a (T × 1) vector of observations of the dependent variable...

  10. Growth, microstructure, and luminescent

    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 (Journalvivo Low-Dose Lowï‚— WeUpdate Jon Peschong Richland5 EOCGroveGrowth,

  11. Regional companies eye growth

    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 RoomPreservation of Fe(II) by Carbon-RichProtonAbout UsRegional companies eye growth Regional

  12. 605september/october 2014, vol. 90, n 5 the forestry chronicle The use of environmentally friendly building materials has experienced slow growth within the residential construction mar-

    E-Print Network [OSTI]

    eco-friendly renewable materials in structures. These programs were targeted at reducing environmental impacts by integrating eco-friendly materials into the design and construction of buildings, including

  13. Dimension growth for C -algebras

    E-Print Network [OSTI]

    2007-05-14

    Feb 6, 2007 ... its range is exhausted by simple, nuclear C?-algebras. As consequences we obtain a well developed the- ory of dimension growth for ...

  14. Lead Slowing-Down Spectrometry for Spent Fuel Assay: FY11 Status Report

    SciTech Connect (OSTI)

    Warren, Glen A.; Casella, Andrew M.; Haight, R. C.; Anderson, Kevin K.; Danon, Yaron; Hatchett, D.; Becker, Bjorn; Devlin, M.; Imel, G. R.; Beller, D.; Gavron, A.; Kulisek, Jonathan A.; Bowyer, Sonya M.; Gesh, Christopher J.; O'Donnell, J. M.

    2011-08-01

    Executive Summary Developing a method for the accurate, direct, and independent assay of the fissile isotopes in bulk materials (such as used fuel) from next-generation domestic nuclear fuel cycles is a goal of the Office of Nuclear Energy, Fuel Cycle R&D, Material Protection and Control Technology (MPACT) Campaign. To meet this goal, MPACT supports a multi-institutional collaboration to study the feasibility of Lead Slowing Down Spectroscopy (LSDS). This technique is an active nondestructive assay method that has the potential to provide independent, direct measurement of Pu and U isotopic masses in used fuel with an uncertainty considerably lower than the approximately 10% typical of today’s confirmatory assay methods. This document is a progress report for FY2011 collaboration activities. Progress made by the collaboration in FY2011 continues to indicate the promise of LSDS techniques applied to used fuel. PNNL developed an empirical model based on calibration of the LSDS to responses generated from well-characterized used fuel. The empirical model demonstrated the potential for the direct and independent assay of the sum of the masses of 239Pu and 241Pu to within approximately 3% over a wide used fuel parameter space. Similar results were obtained using a perturbation approach developed by LANL. Benchmark measurements have been successfully conducted at LANL and at RPI using their respective LSDS instruments. The ISU and UNLV collaborative effort is focused on the fabrication and testing of prototype fission chambers lined with ultra-depleted 238U and 232Th, and uranium deposition on a stainless steel disc using spiked U3O8 from room temperature ionic liquid was successful, with improving thickness obtained. In FY2012, the collaboration plans a broad array of activities. PNNL will focus on optimizing its empirical model and minimizing its reliance on calibration data, as well continuing efforts on developing an analytical model. Additional measurements are planned at LANL and RPI. LANL measurements will include a Pu sample, which is expected to provide more counts at longer slowing-down times to help identify discrepancies between experimental data and MCNPX simulations. RPI measurements will include the assay of an entire fresh fuel assembly for the study of self-shielding effects as well as the ability to detect diversion by detecting a missing fuel pin in the fuel assembly. The development of threshold neutron sensors will continue, and UNLV will calibrate existing ultra-depleted uranium deposits at ISU.

  15. WHAT TO DO ABOUT CLIMATE CHANGE? Slowing the rate of carbon burning won't stop global warming

    E-Print Network [OSTI]

    Baez, John

    WHAT TO DO ABOUT CLIMATE CHANGE? #12;Slowing the rate of carbon burning won't stop global warming: most CO2 stays in the air over a century, though individual molecules come and go. Global warming. But we need to research it -- starting now. If global warming gets bad, public opinion may suddently flip

  16. Interaction of Fast-Scale and Slow-Scale Bifurcations in Current-Mode Controlled DC/DC Converters

    E-Print Network [OSTI]

    Tse, Chi K. "Michael"

    of fast-scale and slow-scale bifurcations in the boost converter under current- mode control operating, and it manifests as period-doubling in the time scale, as reported in Iu et al. [7] for parallel boost converters, Wong et al. [8] for noise-coupled boost converters, and Wu et al. [9] for power

  17. Slow Dynamics and Nonlinear Response at Low Strains in Berea Sandstone James A. TenCate and Thomas J. Shankland

    E-Print Network [OSTI]

    Slow Dynamics and Nonlinear Response at Low Strains in Berea Sandstone James A. TenCate and Thomas on thin bars of sandstone were performed. Resonance curves were ob- tained by measuring acceleration solids [2]. We observe that sandstones have a nonlinear dynamic response down to the smallest strains we

  18. Kinematic flow patterns in slow deformation of a dense granular material

    E-Print Network [OSTI]

    Koushik Viswanathan; Anirban Mahato; Tejas G. Murthy; Tomasz Koziara; Srinivasan Chandrasekar

    2015-07-19

    The kinematic flow pattern in slow deformation of a model dense granular medium is studied at high resolution using \\emph{in situ} imaging, coupled with particle tracking. The deformation configuration is indentation by a flat punch under macroscopic plane-strain conditions. Using a general analysis method, velocity gradients and deformation fields are obtained from the disordered grain arrangement, enabling flow characteristics to be quantified. The key observations are the formation of a stagnation zone, as in dilute granular flow past obstacles; occurrence of vortices in the flow immediately underneath the punch; and formation of distinct shear bands adjoining the stagnation zone. The transient and steady state stagnation zone geometry, as well as the strength of the vortices and strain rates in the shear bands, are obtained from the experimental data. All of these results are well-reproduced in exact-scale Non-Smooth Contact Dynamics (NSCD) simulations. Full 3D numerical particle positions from the simulations allow extraction of flow features that are extremely difficult to obtain from experiments. Three examples of these, namely material free surface evolution, deformation of a grain column below the punch and resolution of velocities inside the primary shear band, are highlighted. The variety of flow features observed in this model problem also illustrates the difficulty involved in formulating a complete micromechanical analytical description of the deformation.

  19. Advanced slow-magic angle spinning probe for magnetic resonance imaging and spectroscopy

    DOE Patents [OSTI]

    Wind, Robert A.; Hu, Jian Zhi; Minard, Kevin R.; Rommereim, Donald N.

    2006-01-24

    The present invention relates to a probe and processes useful for magnetic resonance imaging and spectroscopy instruments. More particularly, the invention relates to a MR probe and processes for obtaining resolution enhancements of fluid objects, including live specimens, using an ultra-slow (magic angle) spinning (MAS) of the specimen combined with a modified phase-corrected magic angle turning (PHORMAT) pulse sequence. Proton NMR spectra were measured of the torso and the top part of the belly of a female BALBc mouse in a 2T field, while spinning the animal at a speed of 1.5 Hz. Results show that even in this relatively low field with PHORMAT, an isotropic spectrum is obtained with line widths that are a factor 4.6 smaller than those obtained in a stationary mouse. Resolution of 1H NMR metabolite spectra are thus significantly enhanced. Results indicate that PHORMAT has the potential to significantly increase the utility of 1H NMR spectroscopy for in vivo biochemical, biomedical and/or medical applications involving large-sized biological objects such as mice, rats and even humans within a hospital setting. For small-sized objects, including biological objects, such as excised tissues, organs, live bacterial cells, and biofilms, use of PASS at a spinning rate of 30 Hz and above is preferred.

  20. SPECTRAL SLOPE VARIATION AT PROTON SCALES FROM FAST TO SLOW SOLAR WIND

    SciTech Connect (OSTI)

    Bruno, R.; Trenchi, L.; Telloni, D.

    2014-09-20

    We investigated the behavior of the spectral slope of interplanetary magnetic field fluctuations at proton scales for selected high-resolution time intervals from the WIND and MESSENGER spacecraft at 1 AU and 0.56 AU, respectively. The analysis was performed within the profile of high-speed streams, moving from fast to slow wind regions. The spectral slope showed a large variability between –3.75 and –1.75 and a robust tendency for this parameter to be steeper within the trailing edge, where the speed is higher, and to be flatter within the subsequent slower wind, following a gradual transition between these two states. The value of the spectral index seems to depend firmly on the power associated with the fluctuations within the inertial range; the higher the power, the steeper the slope. Our results support previous analyses suggesting that there must be some response of the dissipation mechanism to the level of the energy transfer rate along the inertial range.

  1. Global dynamics and inflationary center manifold and slow-roll approximants

    E-Print Network [OSTI]

    Artur Alho; Claes Uggla

    2015-01-15

    We consider the familiar problem of a minimally coupled scalar field with quadratic potential in flat Friedmann-Lema\\^itre-Robertson-Walker cosmology to illustrate a number of techniques and tools, which can be applied to a wide range of scalar field potentials and problems in e.g. modified gravity. We present a global and regular dynamical systems description that yields a global understanding of the solution space, including asymptotic features. We introduce dynamical systems techniques such as center manifold expansions and use Pad\\'e approximants to obtain improved approximations for the `attractor solution' at early times. We also show that future asymptotic behavior is associated with a limit cycle, which shows that manifest self-similarity is asymptotically broken toward the future, and give approximate expressions for this behavior. We then combine these results to obtain global approximations for the attractor solution, which, e.g., might be used in the context of global measures. In addition we elucidate the connection between slow-roll based approximations and the attractor solution, and compare these approximations with the center manifold based approximants.

  2. Simplified treatment of exact resonance elastic scattering model in deterministic slowing down equation

    SciTech Connect (OSTI)

    Ono, M.; Wada, K.; Kitada, T.

    2012-07-01

    Simplified treatment of resonance elastic scattering model considering thermal motion of heavy nuclides and the energy dependence of the resonance cross section was implemented into NJOY [1]. In order to solve deterministic slowing down equation considering the effect of up-scattering without iterative calculations, scattering kernel for heavy nuclides is pre-calculated by the formula derived by Ouisloumen and Sanchez [2], and neutron spectrum in up-scattering term is expressed by NR approximation. To check the verification of the simplified treatment, the treatment is applied to U-238 for the energy range from 4 eV to 200 eV. Calculated multi-group capture cross section of U-238 is greater than that of conventional method and the increase of the capture cross sections is remarkable as the temperature becomes high. Therefore Doppler coefficient calculated in UO{sub 2} fuel pin is calculated more negative value than that on conventional method. The impact on Doppler coefficient is equivalent to the results of exact treatment of resonance elastic scattering reported in previous studies [2-7]. The agreement supports the validation of the simplified treatment and therefore this treatment is applied for other heavy nuclide to evaluate the Doppler coefficient in MOX fuel. The result shows that the impact of considering thermal agitation in resonance scattering in Doppler coefficient comes mainly from U-238 and that of other heavy nuclides such as Pu-239, 240 etc. is not comparable in MOX fuel. (authors)

  3. Statistical detection of slow-mode waves in solar polar regions with SDO/AIA

    SciTech Connect (OSTI)

    Su, J. T., E-mail: sjt@bao.ac.cn [Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China); State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190 (China)

    2014-10-01

    Observations from the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory are utilized to statistically investigate the propagating quasi-periodic oscillations in the solar polar plume and inter-plume regions. On average, the periods are found to be nearly equal in the three coronal channels of AIA 171 Å, 193 Å, and 211 Å, and the wavelengths increase with temperature from 171 Å, 193 Å, and 211 Å. The phase speeds may be inferred from the above parameters. Furthermore, the speed ratios of v {sub 193}/v {sub 171} and v {sub 211}/v {sub 171} are derived, e.g., 1.4 ± 0.8 and 2.0 ± 1.9 in the plume regions, respectively, which are equivalent to the theoretical ones for acoustic waves. We find that there are no significant differences for the detected parameters between the plume and inter-plume regions. To our knowledge, this is the first time that we have simultaneously obtained the phase speeds of slow-mode waves in the three channels in the open coronal magnetic structures due to the method adopted in the present work, which is able to minimize the influence of the jets or eruptions on wave signals.

  4. Shared inputs, entrainment, and desynchrony in elliptic bursters: from slow passage to discontinuous circle maps

    E-Print Network [OSTI]

    Guillaume Lajoie; Eric Shea-Brown

    2011-05-24

    What input signals will lead to synchrony vs. desynchrony in a group of biological oscillators? This question connects with both classical dynamical systems analyses of entrainment and phase locking and with emerging studies of stimulation patterns for controlling neural network activity. Here, we focus on the response of a population of uncoupled, elliptically bursting neurons to a common pulsatile input. We extend a phase reduction from the literature to capture inputs of varied strength, leading to a circle map with discontinuities of various orders. In a combined analytical and numerical approach, we apply our results to both a normal form model for elliptic bursting and to a biophysically-based neuron model from the basal ganglia. We find that, depending on the period and amplitude of inputs, the response can either appear chaotic (with provably positive Lyaponov exponent for the associated circle maps), or periodic with a broad range of phase-locked periods. Throughout, we discuss the critical underlying mechanisms, including slow-passage effects through Hopf bifurcation, the role and origin of discontinuities, and the impact of noise

  5. Estimates for Pu-239 loadings in burial ground culverts based on fast/slow neutron measurements

    SciTech Connect (OSTI)

    Winn, W.G.; Hochel, R.C.; Hofstetter, K.J.; Sigg, R.A.

    1989-08-15

    This report provides guideline estimates for Pu-239 mass loadings in selected burial ground culverts. The relatively high recorded Pu-239 contents of these culverts have been appraised as suspect relative to criticality concerns, because they were assayed only with the solid waste monitor (SWM) per gamma-ray counting. After 1985, subsequent waste was also assayed with the neutron coincidence counter (NCC), and a comparison of the assay methods showed that the NCC generally yielded higher assays than the SWM. These higher NCC readings signaled a need to conduct non-destructive/non-intrusive nuclear interrogations of these culverts, and a technical team conducted scoping measurements to illustrate potential assay methods based on neutron and/or gamma counting. A fast/slow neutron method has been developed to estimate the Pu-239 in the culverts. In addition, loading records include the SWM assays of all Pu-239 cuts of some of the culvert drums and these data are useful in estimating the corresponding NCC drum assays from NCC vs SWM data. Together, these methods yield predictions based on direct measurements and statistical inference.

  6. ISOTOPIC MASS FRACTIONATION OF SOLAR WIND: EVIDENCE FROM FAST AND SLOW SOLAR WIND COLLECTED BY THE GENESIS MISSION

    SciTech Connect (OSTI)

    Heber, Veronika S.; Baur, Heinrich; Wieler, Rainer; Bochsler, Peter; McKeegan, Kevin D.; Neugebauer, Marcia; Reisenfeld, Daniel B.; Wiens, Roger C.

    2012-11-10

    NASA's Genesis space mission returned samples of solar wind collected over {approx}2.3 years. We present elemental and isotopic compositions of He, Ne, and Ar analyzed in diamond-like carbon targets from the slow and fast solar wind collectors to investigate isotopic fractionation processes during solar wind formation. The solar wind provides information on the isotopic composition for most volatile elements for the solar atmosphere, the bulk Sun and hence, on the solar nebula from which it formed 4.6 Ga ago. Our data reveal a heavy isotope depletion in the slow solar wind compared to the fast wind composition by 63.1 {+-} 2.1 per mille for He, 4.2 {+-} 0.5 per mille amu{sup -1} for Ne and 2.6 {+-} 0.5 per mille amu{sup -1} for Ar. The three Ne isotopes suggest that isotopic fractionation processes between fast and slow solar wind are mass dependent. The He/H ratios of the collected slow and fast solar wind samples are 0.0344 and 0.0406, respectively. The inefficient Coulomb drag model reproduces the measured isotopic fractionation between fast and slow wind. Therefore, we apply this model to infer the photospheric isotopic composition of He, Ne, and Ar from our solar wind data. We also compare the isotopic composition of oxygen and nitrogen measured in the solar wind with values of early solar system condensates, probably representing solar nebula composition. We interpret the differences between these samples as being due to isotopic fractionation during solar wind formation. For both elements, the magnitude and sign of the observed differences are in good agreement with the values predicted by the inefficient Coulomb drag model.

  7. Bulge growth through disk instabilities in high-redshift galaxies

    E-Print Network [OSTI]

    Bournaud, Frederic

    2015-01-01

    The role of disk instabilities, such as bars and spiral arms, and the associated resonances, in growing bulges in the inner regions of disk galaxies have long been studied in the low-redshift nearby Universe. There it has long been probed observationally, in particular through peanut-shaped bulges. This secular growth of bulges in modern disk galaxies is driven by weak, non-axisymmetric instabilities: it mostly produces pseudo-bulges at slow rates and with long star-formation timescales. Disk instabilities at high redshift (z>1) in moderate-mass to massive galaxies (10^10 to a few 10^11 Msun of stars) are very different from those found in modern spiral galaxies. High-redshift disks are globally unstable and fragment into giant clumps containing 10^8-10^9 Msun of gas and stars each, which results in highly irregular galaxy morphologies. The clumps and other features associated to the violent instability drive disk evolution and bulge growth through various mechanisms, on short timescales. The giant clumps can...

  8. Growth management and sustainable transport: Do growth management policies promote transit use? 

    E-Print Network [OSTI]

    Deal, Brian; Kim, Jae H; Chackraborty, Arnab

    2009-01-01

    4). Figure 4. Sustainable Growth Management and TransportIntegration Growth Management and Sustainable Transport2004. Do state growth management regulations reduce sprawl?

  9. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--II: EXPRESS BRIEFS, VOL. 55, NO. 5, MAY 2008 489 Sustained Slow-Scale Oscillation in Higher Order

    E-Print Network [OSTI]

    Tse, Chi K. "Michael"

    ­dc converters, i.e., buck, buck­boost, and boost converters. In this paper, slow-scale bifurcation in a higher such as the buck-boost and flyback con- verters. For such higher order dc­dc converters under current- mode control Sustained Slow-Scale Oscillation in Higher Order Current-Mode Controlled Converter Siu Chung Wong, Member

  10. Dispersionless slow light using gap solitons JOE T. MOK*, C. MARTIJN DE STERKE, IAN C. M. LITTLER AND BENJAMIN J. EGGLETON

    E-Print Network [OSTI]

    Loss, Daniel

    ARTICLES Dispersionless slow light using gap solitons JOE T. MOK*, C. MARTIJN DE STERKE, IAN C. M respond sufficiently fast to the very short light pulses that will carry the information in future telecommunications systems. However, typical slow-light systems exhibit dispersion, which distorts the pulses

  11. Logistic Growth The logistic equation is a model of limited population growth. The exponential growth model

    E-Print Network [OSTI]

    Ikenaga, Bruce

    9­28­1998 Logistic Growth The logistic equation is a model of limited population growth of organisms runs out of food, encounters predators, or fouls its own environment with waste. The logistic the carrying capacity. Example. A population of roaches grows logistically in Calvin Butterball's kitchen

  12. Arresting bubble coarsening: A model for stopping grain growth with interfacial elasticity

    E-Print Network [OSTI]

    Anniina Salonen; Cyprien Gay; Armando Maestro; Wiebke Drenckhan; Emmanuelle Rio

    2015-05-22

    Many two-phase materials suffer from grain-growth due to the energy cost which is associated with the interface that separates both phases. While our understanding of the driving forces and the dynamics of grain growth in different materials is well advanced by now, current research efforts address the question of how this process may be slowed down, or, ideally, arrested. We use a model system of two bubbles to explore how the presence of an interfacial elasticity may interfere with the coarsening process and the final grain size distribution. Combining experiments and modelling in the analysis of the evolution of two bubbles, we show that clear relationships can be predicted between the interfacial tension, the interfacial elasticity and the change in bubble polydispersity. Despite its general interest, the presented results have direct implications for our understanding of foam stability.

  13. ON THE LOW-FREQUENCY BOUNDARY OF SUN-GENERATED MAGNETOHYDRODYNAMIC TURBULENCE IN THE SLOW SOLAR WIND

    SciTech Connect (OSTI)

    Shergelashvili, Bidzina M.; Fichtner, Horst

    2012-06-20

    New aspects of the slow solar wind turbulent heating and acceleration are investigated. A physical meaning of the lower boundary of the Alfven wave turbulent spectra in the solar atmosphere and the solar wind is studied and the significance of this natural parameter is demonstrated. Via an analytical and quantitative treatment of the problem we show that a truncation of the wave spectra from the lower frequency side, which is a consequence of the solar magnetic field structure and its cyclic changes, results in a significant reduction of the heat production and acceleration rates. An appropriate analysis is presented regarding the link of the considered problem with existing observational data and slow solar wind initiation scenarios.

  14. Growth and properties of Lithium Salicylate single crystals

    SciTech Connect (OSTI)

    Zaitseva, N; Newby, J; Hull, G; Saw, C; Carman, L; Cherepy, N; Payne, S

    2009-02-13

    An attractive feature of {sup 6}Li containing fluorescence materials that determines their potential application in radiation detection is the capture reaction with slow ({approx}< 100 keV) neutrons: {sup 6}Li + n = {sup 4}He + {sup 3}H + 4.8MeV. The use of {sup 6}Li-salicylate (LiSal, LiC{sub 6}H{sub 5}O{sub 3}) for thermal neutron detection was previously studied in liquid and polycrystalline scintillators. The studies showed that both liquid and polycrystalline LiSal scintillators could be utilized in pulse shape discrimination (PSD) techniques that enable separation of neutrons from the background gamma radiation. However, it was found that the efficiency of neutron detection using LiSal in liquid solutions was severely limited by its low solubility in commonly used organic solvents like, for example, toluene or xylene. Better results were obtained with neutron detectors containing the compound in its crystalline form, such as pressed pellets, or microscopic-scale (7-14 micron) crystals dispersed in various media. The expectation drown from these studies was that further improvement of pulse height, PSD, and efficiency characteristics could be reached with larger and more transparent LiSal crystals, growth of which has not been reported so far. In this paper, we present the first results on growth and characterization of relatively large, a cm-scale size, single crystals of LiSal with good optical quality. The crystals were grown both from aqueous and anhydrous (methanol) media, mainly for neutron detection studies. However, the results on growth and structural characterization may be interesting for other fields where LiSal, together with other alkali metal salicylates, is used for biological, medical, and chemical (as catalyst) applications.

  15. The Very Long Run Economic Growth

    E-Print Network [OSTI]

    Wu, Lemin

    2013-01-01

    the stochastic growth of technology as the source of inter-2000. “Population, technology, and growth: From Malthusianhas constant growth rates of technology g A and g B , then g

  16. Growth machine theory: a qualitative analysis 

    E-Print Network [OSTI]

    Smith, Gavin Paul

    1993-01-01

    of land inherent in growth machine theory, does not necessarily result in a dialectic, win-lose situation. Furthermore, it is argued that the growth coalition may not always ado t a unidimensional roach to development where further growth...

  17. Calculations of the cross sections for the neutron acceleration, slowing down, and capture by the isomer "OmHf

    E-Print Network [OSTI]

    Shlyakhter, Ilya

    Calculations of the cross sections for the neutron acceleration, slowing down, and capture for the isomer lsomHf in the energy range of the incoming neutron from 1keV to 5 MeV. Below 0.7 MeV the energy transferred to the neutron in the collision is positive on the average, i.e., the isomer is acting

  18. Identification of genetically homozygous rapid and slow acetylators of drugs and environmental carcinogens among established inbred rabbit strains

    SciTech Connect (OSTI)

    Hein, D.W.; Smolen, T.N.; Fox, R.R.; Weber, W.W.

    1982-10-01

    Liver and gut mucosa N-acetyltransferase (NAT) cytosol (105,000 x g) was prepared from selected lines of New Zealand White rapid and slow acetylator rabbits bred and housed at the University of Michigan, and from inbred and partially inbred rabbits obtained from The Jackson Laboratory. Liver NAT activity was determined with p-aminobenzoic acid, p-aminosalicylic acid, procainamide, sulfamethazine, isoniazid and 2-aminofluorene as substrates. Gut mucosal NAT activity was determined with 2-aminofluorene. A gene dose-response relationship was observed for both liver NAT and gut mucosa NAT with all substrates tested. Highest levels were always observed in homozygous rapid acetylator inbred strains (B/J, III/J, IIIC/J, III/DwJ, IIIEP/J and IIIVO/J), lower levels in obligate heterozygous rapid acetylator rabbits and lowest levels in homozygous slow acetylator inbred (ACEP/J, III/cdJ, IIIVO/ahJ, and IIIVO/vptJ) and outbred rabbits. The differences in magnitude of liver NAT activity level between acetylator genotypes was dependent on the substrate employed, progressively increasing in the following order: p-aminobenzoic acid, p-aminosalicyclic acid, procainamide, sulfamethazine, isoniazid, 2-aminofluorene. The determination of kinetic constants for liver p-aminosalicyclic acid NAT activity indicated a 2-fold difference in apparent Vmax between rapid acetylator genotypes and a 30-fold difference between rapid and slow acetylator phenotypes. In addition, the apparent Km for p-aminosalicyclic acid was significantly lower in the slow acetylators than in the rapid acetylators.

  19. Human linear growth trajectory defined

    E-Print Network [OSTI]

    2013-01-01

    a child’s height in its 3rd year of age is greater than thatbut its growth rate in the 3rd year is slower than that in

  20. The Annual Growth In Plants

    E-Print Network [OSTI]

    Courtright, J. E.

    1903-01-01

    KU ScholarWorks | The University of Kansas Pre-1923 Dissertations and Theses Collection The Annual Growth In Plants 1903 by J. E. Courtright This work was digitized by the Scholarly Communications program staff in the KU Libraries’ Center...

  1. Slowing of magnetic reconnection concurrent with weakening plasma inflows and increasing collisionality in strongly-driven laser-plasma experiments

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

    Rosenberg, M.? J.; Li, C.? K.; Fox, W.; Zylstra, A.? B.; Stoeckl, C.; Séguin, F.? H.; Frenje, J.? A.; Petrasso, R.? D.

    2015-05-20

    An evolution of magnetic reconnection behavior, from fast jets to the slowing of reconnection and the establishment of a stable current sheet, has been observed in strongly driven, ? ? 20 laser-produced plasma experiments. This process has been inferred to occur alongside a slowing of plasma inflows carrying the oppositely-directed magnetic fields as well as the evolution of plasma conditions from collisionless to collisional. High-resolution proton radiography has revealed unprecedented detail of the forced interaction of magnetic fields and super-Alfvénic electron jets (Vjet ~ 20VA) ejected from the reconnection region, indicating that two-fluid or collisionless magnetic reconnection occurs early inmore »time. The absence of jets and the persistence of strong, stable magnetic fields at late times indicates that the reconnection process slows down, while plasma flows stagnate and plasma conditions evolve to a cooler, denser, more collisional state. These results demonstrate that powerful initial plasma flows are not sufficient to force a complete reconnection of magnetic fields, even in the strongly-driven regime.« less

  2. Detection of slow atoms confined in a Cesium vapor cell by spatially separated pump and probe laser beams

    E-Print Network [OSTI]

    Todorov, Petko; Maurin, Isabelle; Saltiel, Solomon; Bloch, Daniel

    2013-01-01

    The velocity distribution of atoms in a thermal gas is usually described through a Maxwell-Boltzman distribution of energy, and assumes isotropy. As a consequence, the probability for an atom to leave the surface under an azimuth angle {\\theta} should evolve as cos {\\theta}, in spite of the fact that there is no microscopic basis to justify such a law. The contribution of atoms moving at a grazing incidence towards or from the surface, i.e. atoms with a small normal velocity, here called "slow" atoms, reveals essential in the development of spectroscopic methods probing a dilute atomic vapor in the vicinity of a surface, enabling a sub-Doppler resolution under a normal incidence irradiation. The probability for such "slow" atoms may be reduced by surface roughness and atom-surface interaction. Here, we describe a method to observe and to count these slow atoms relying on a mechanical discrimination, through spatially separated pump and probe beams. We also report on our experimental progresses toward such a g...

  3. Slowing of magnetic reconnection concurrent with weakening plasma inflows and increasing collisionality in strongly-driven laser-plasma experiments

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

    Rosenberg, M.? J.; Li, C.? K.; Fox, W.; Zylstra, A.? B.; Stoeckl, C.; Séguin, F.? H.; Frenje, J.? A.; Petrasso, R. D.

    2015-05-20

    An evolution of magnetic reconnection behavior, from fast jets to the slowing of reconnection and the establishment of a stable current sheet, has been observed in strongly-driven, ? ? 20 laser-produced plasma experiments. This process has been inferred to occur alongside a slowing of plasma inflows carrying the oppositely-directed magnetic fields as well as the evolution of plasma conditions from collisionless to collisional. High-resolution proton radiography has revealed unprecedented detail of the forced interaction of magnetic fields and super-Alfvénic electron jets (Vjet~ 20VA) ejected from the reconnection region, indicating that two-fluid or collisionless magnetic reconnection occurs early in time. Themore »absence of jets and the persistence of strong, stable magnetic fields at late times indicates that the reconnection process slows down, while plasma flows stagnate and plasma conditions evolve to a cooler, denser, more collisional state. These results demonstrate that powerful initial plasma flows are not sufficient to force a complete reconnection of magnetic fields, even in the strongly-driven regime.« less

  4. Flux enhancement of slow-moving particles by Sun or Jupiter: Can they be detected on Earth?

    SciTech Connect (OSTI)

    Patla, Bijunath R.; Nemiroff, Robert J.; Hoffmann, Dieter H. H.; Zioutas, Konstantin

    2014-01-10

    Slow-moving particles capable of interacting solely with gravity might be detected on Earth as a result of the gravitational lensing induced focusing action of the Sun. The deflection experienced by these particles is inversely proportional to the square of their velocities, and as a result their focal lengths will be shorter. We investigate the velocity dispersion of these slow-moving particles, originating from distant point-like sources, for imposing upper and lower bounds on the velocities of such particles in order for them to be focused onto Earth. Stars, distant galaxies, and cluster of galaxies, etc., may all be considered as point-like sources. We find that fluxes of such slow-moving and non-interacting particles must have speeds between ?0.01 and .14 times the speed of light, c. Particles with speeds less than ?0.01c will undergo way too much deflection to be focused, although such individual particles could be detected. At the caustics, the magnification factor could be as high as ?10{sup 6}. We impose lensing constraints on the mass of these particles in order for them to be detected with large flux enhancements that are greater than 10{sup –9} eV. An approximate mass density profile for Jupiter is used to constrain particle velocities for lensing by Jupiter. We show that Jupiter could potentially focus particles with speeds as low as ?0.001c, which the Sun cannot.

  5. Lead Slowing-Down Spectrometry Time Spectral Analysis for Spent Fuel Assay: FY12 Status Report

    SciTech Connect (OSTI)

    Kulisek, Jonathan A.; Anderson, Kevin K.; Casella, Andrew M.; Siciliano, Edward R.; Warren, Glen A.

    2012-09-28

    Executive Summary Developing a method for the accurate, direct, and independent assay of the fissile isotopes in bulk materials (such as used fuel) from next-generation domestic nuclear fuel cycles is a goal of the Office of Nuclear Energy, Fuel Cycle R&D, Material Protection and Control Technology (MPACT) Campaign. To meet this goal, MPACT supports a multi-institutional collaboration, of which PNNL is a part, to study the feasibility of Lead Slowing Down Spectroscopy (LSDS). This technique is an active nondestructive assay method that has the potential to provide independent, direct measurement of Pu and U isotopic masses in used fuel with an uncertainty considerably lower than the approximately 10% typical of today’s confirmatory methods. This document is a progress report for FY2012 PNNL analysis and algorithm development. Progress made by PNNL in FY2012 continues to indicate the promise of LSDS analysis and algorithms applied to used fuel assemblies. PNNL further refined the semi-empirical model developed in FY2011 based on singular value decomposition (SVD) to numerically account for the effects of self-shielding. The average uncertainty in the Pu mass across the NGSI-64 fuel assemblies was shown to be less than 3% using only six calibration assemblies with a 2% uncertainty in the isotopic masses. When calibrated against the six NGSI-64 fuel assemblies, the algorithm was able to determine the total Pu mass within <2% uncertainty for the 27 diversion cases also developed under NGSI. Two purely empirical algorithms were developed that do not require the use of Pu isotopic fission chambers. The semi-empirical and purely empirical algorithms were successfully tested using MCNPX simulations as well applied to experimental data measured by RPI using their LSDS. The algorithms were able to describe the 235U masses of the RPI measurements with an average uncertainty of 2.3%. Analyses were conducted that provided valuable insight with regard to design requirements (e.g. Pb stack size, neutron source location) of an LSDS for the purpose of assaying used fuel assemblies. Sensitivity studies were conducted that provide insight as to how the LSDS instrument can be improved by making it more sensitive to the center of the fuel assemblies. In FY2013, PNNL will continue efforts to develop and refine design requirements of an LSDS for the ultimate purpose of assaying used fuel assemblies. Future efforts will be directed toward more extensive experimental benchmarking of currently implemented time-spectra analysis algorithms.

  6. Lead Slowing-Down Spectrometry Time Spectral Analysis for Spent Fuel Assay: FY11 Status Report

    SciTech Connect (OSTI)

    Kulisek, Jonathan A.; Anderson, Kevin K.; Bowyer, Sonya M.; Casella, Andrew M.; Gesh, Christopher J.; Warren, Glen A.

    2011-09-30

    Developing a method for the accurate, direct, and independent assay of the fissile isotopes in bulk materials (such as used fuel) from next-generation domestic nuclear fuel cycles is a goal of the Office of Nuclear Energy, Fuel Cycle R&D, Material Protection and Control Technology (MPACT) Campaign. To meet this goal, MPACT supports a multi-institutional collaboration, of which PNNL is a part, to study the feasibility of Lead Slowing Down Spectroscopy (LSDS). This technique is an active nondestructive assay method that has the potential to provide independent, direct measurement of Pu and U isotopic masses in used fuel with an uncertainty considerably lower than the approximately 10% typical of today's confirmatory assay methods. This document is a progress report for FY2011 PNNL analysis and algorithm development. Progress made by PNNL in FY2011 continues to indicate the promise of LSDS analysis and algorithms applied to used fuel. PNNL developed an empirical model based on calibration of the LSDS to responses generated from well-characterized used fuel. The empirical model, which accounts for self-shielding effects using empirical basis vectors calculated from the singular value decomposition (SVD) of a matrix containing the true self-shielding functions of the used fuel assembly models. The potential for the direct and independent assay of the sum of the masses of 239Pu and 241Pu to within approximately 3% over a wide used fuel parameter space was demonstrated. Also, in FY2011, PNNL continued to develop an analytical model. Such efforts included the addition of six more non-fissile absorbers in the analytical shielding function and the non-uniformity of the neutron flux across the LSDS assay chamber. A hybrid analytical-empirical approach was developed to determine the mass of total Pu (sum of the masses of 239Pu, 240Pu, and 241Pu), which is an important quantity in safeguards. Results using this hybrid method were of approximately the same accuracy as the pure empirical approach. In addition, total Pu with much better accuracy with the hybrid approach than the pure analytical approach. In FY2012, PNNL will continue efforts to optimize its empirical model and minimize its reliance on calibration data. In addition, PNNL will continue to develop an analytical model, considering effects such as neutron-scattering in the fuel and cladding, as well as neutrons streaming through gaps between fuel pins in the fuel assembly.

  7. Cosmic Growth History and Expansion History

    E-Print Network [OSTI]

    Linder, Eric V.

    2009-01-01

    LBNL- 58260 Cosmic Growth History andExpansion History Eric V. Linder Physics Division, LawrenceCalifornia. Cosmic Growth History and Expansion History Eric

  8. Nonlinear structural crack growth monitoring

    DOE Patents [OSTI]

    Welch, Donald E. (Oak Ridge, TN); Hively, Lee M. (Philadelphia, TN); Holdaway, Ray F. (Clinton, TN)

    2002-01-01

    A method and apparatus are provided for the detection, through nonlinear manipulation of data, of an indicator of imminent failure due to crack growth in structural elements. The method is a process of determining energy consumption due to crack growth and correlating the energy consumption with physical phenomena indicative of a failure event. The apparatus includes sensors for sensing physical data factors, processors or the like for computing a relationship between the physical data factors and phenomena indicative of the failure event, and apparatus for providing notification of the characteristics and extent of such phenomena.

  9. Power law inflation with a non-minimally coupled scalar field in light of Planck and BICEP2 data: The exact versus slow roll results

    E-Print Network [OSTI]

    Sergio del Campo; Carlos Gonzalez; Ramon Herrera

    2015-01-23

    We study power law inflation in the context of non-minimally coupled to the scalar curvature. We analyze the inflationary solutions under an exact analysis and also in the slow roll approximation. In both solutions, we consider the recent data from Planck and BICEP2 data to constraint the parameter in our model. We find that the slow roll approximation is disfavored in the presence of non-minimal couplings during the power law expansion of the Universe.

  10. Analogy of the slow dynamics between the supercooled liquid and the supercooled plastic crystal states of difluorotetrachloroethane

    E-Print Network [OSTI]

    F. Affouard; M. Descamps

    2005-02-15

    Slow dynamics of difluorotetrachloroethane in both supercooled plastic crystal and supercooled liquid states have been investigated from Molecular Dynamics simulations. The temperature and wave-vector dependence of collective dynamics in both states are probed using coherent dynamical scattering functions $S(Q,t)$. Our results confirm the strong analogy between molecular liquids and plastic crystals for which $\\alpha$-relaxation times and non-ergodicity parameters are controlled by the non trivial static correlations $S(Q)$ as predicted by the Mode Coupling Theory. The use of infinitely thin needles distributed on a lattice as model of plastic crystals is discussed.

  11. SBA Growth Accelerator Fund Competition

    Broader source: Energy.gov [DOE]

    The U.S. Small Business Administration (SBA) is accepting applications for the Growth Accelerator Fund Competition to identify the nation's innovative accelerators and similar organizations and award them cash prizes they may use to fund their operations costs and allow them to bring startup competitions to scale and new ideas to life.

  12. Graphene Growth and Device Integration

    E-Print Network [OSTI]

    INVITED P A P E R Graphene Growth and Device Integration This paper describes one of the emerging methods for growing grapheneVthe chemical vapor deposition methodVwhich is based on a catalytic reaction, Fellow IEEE, Robert M. Wallace, Fellow IEEE, and Rodney S. Ruoff ABSTRACT | Graphene has been introduced

  13. CRACK GROWTH ANALYSIS OF SOLID OXIDE FUEL CELL ELECTROLYTES

    SciTech Connect (OSTI)

    S. Bandopadhyay; N. Nagabhushana

    2003-10-01

    Defects and Flaws control the structural and functional property of ceramics. In determining the reliability and lifetime of ceramics structures it is very important to quantify the crack growth behavior of the ceramics. In addition, because of the high variability of the strength and the relatively low toughness of ceramics, a statistical design approach is necessary. The statistical nature of the strength of ceramics is currently well recognized, and is usually accounted for by utilizing Weibull or similar statistical distributions. Design tools such as CARES using a combination of strength measurements, stress analysis, and statistics are available and reasonably well developed. These design codes also incorporate material data such as elastic constants as well as flaw distributions and time-dependent properties. The fast fracture reliability for ceramics is often different from their time-dependent reliability. Further confounding the design complexity, the time-dependent reliability varies with the environment/temperature/stress combination. Therefore, it becomes important to be able to accurately determine the behavior of ceramics under simulated application conditions to provide a better prediction of the lifetime and reliability for a given component. In the present study, Yttria stabilized Zirconia (YSZ) of 9.6 mol% Yttria composition was procured in the form of tubes of length 100 mm. The composition is of interest as tubular electrolytes for Solid Oxide Fuel Cells. Rings cut from the tubes were characterized for microstructure, phase stability, mechanical strength (Weibull modulus) and fracture mechanisms. The strength at operating condition of SOFCs (1000 C) decreased to 95 MPa as compared to room temperature strength of 230 MPa. However, the Weibull modulus remains relatively unchanged. Slow crack growth (SCG) parameter, n = 17 evaluated at room temperature in air was representative of well studied brittle materials. Based on the results, further work was planned to evaluate the strength degradation, modulus and failure in more representative environment of the SOFCs.

  14. Evidence of thermal conduction suppression in a solar flaring loop by coronal seismology of slow-mode waves

    E-Print Network [OSTI]

    Wang, Tongjiang; Sun, Xudong; Provornikova, Elena; Davila, Joseph M

    2015-01-01

    Analysis of a longitudinal wave event observed by the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) is presented. A time sequence of 131 A images reveals that a C-class flare occurred at one footpoint of a large loop and triggered an intensity disturbance (enhancement) propagating along it. The spatial features and temporal evolution suggest that a fundamental standing slow-mode wave could be set up quickly after meeting of two initial disturbances from the opposite footpoints. The oscillations have a period of ~12 min and a decay time of ~9 min. The measured phase speed of 500$\\pm$50 km/s matches the sound speed in the heated loop of ~10 MK, confirming that the observed waves are of slow mode. We derive the time-dependent temperature and electron density wave signals from six AIA extreme-ultraviolet (EUV) channels, and find that they are nearly in phase.The measured polytropic index from the temperature and density perturbations is 1.64$\\pm$0.08 close to the adiabatic index ...

  15. Method for crystal growth control

    DOE Patents [OSTI]

    Yates, Douglas A. (Burlington, MA); Hatch, Arthur E. (Waltham, MA); Goldsmith, Jeff M. (Medford, MA)

    1981-01-01

    The growth of a crystalline body of a selected material is controlled so that the body has a selected cross-sectional shape. The apparatus is of the type which includes the structure normally employed in known capillary die devices as well as means for observing at least the portion of the surfaces of the growing crystalline body and the meniscus (of melt material from which the body is being pulled) including the solid/liquid/vapor junction in a direction substantially perpendicular to the meniscus surface formed at the junction when the growth of the crystalline body is under steady state conditions. The cross-sectional size of the growing crystalline body can be controlled by determining which points exhibit a sharp change in the amount of reflected radiation of a preselected wavelength and controlling the speed at which the body is being pulled or the temperature of the growth pool of melt so as to maintain those points exhibiting a sharp change at a preselected spatial position relative to a predetermined reference position. The improvement comprises reference object means positioned near the solid/liquid/vapor junction and capable of being observed by the means for observing so as to define said reference position so that the problems associated with convection current jitter are overcome.

  16. Nutritional Modulations of Piglet Growth and Survival 

    E-Print Network [OSTI]

    Rezaei, Reza

    2012-02-14

    on mortality, growth performance, and efficiency of sow-reared piglets; and 2) determine the effects of a phytochemical (Yucca schidigera) on growth performance of postweaning pigs. In the first experiment, piglets (n=160) from 18 multiparous sows (Landrace X...

  17. New Partners for Smart Growth Conference

    Broader source: Energy.gov [DOE]

    The New Partners for Smart Growth Conference is the nation's largest smart growth and sustainability conference. The three-day conference is themed, "Practical Tools and Innovative Strategies for Creating Great Communities."

  18. Stress corrosion crack growth in porous sandstones. 

    E-Print Network [OSTI]

    Ojala, Ira O

    Stress corrosion crack growth occurs when the chemical weakening of strained crack tip bonds facilitates crack propagation. I have examined the effect of chemical processes on the growth of a creack population by carrying out triaxial compression...

  19. Biochar and Plant Growth Promoting Rhizobacteria as Soil Amendments

    E-Print Network [OSTI]

    Hale, Lauren Elizabeth

    2014-01-01

    of biochar from fast pyrolysis and gasification systems.of two biochar production scenarios: slow pyrolysis vsfast pyrolysis. Biofuels Bioprod. Biorefining 5, 54–68.

  20. Monitoring CO2 Storage at Cranfield, Mississippi with Time-Lapse Offset VSP – Using Integration and Modeling to Reduce Uncertainty

    SciTech Connect (OSTI)

    Daley, Thomas M. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Hendrickson, Joel [Steelhead Geophysical LLC, New Orleans, LA (United States); Queen, John H. [Hi-Q Geophysical Inc., Ponca City, OK (United States)

    2014-12-31

    A time-lapse Offset Vertical Seismic Profile (OVSP) data set was acquired as part of a subsurface monitoring program for geologic sequestration of CO2. The storage site at Cranfield, near Natchez, Mississippi, is part of a detailed area study (DAS) site for geologic carbon sequestration operated by the U.S. Dept. of Energy’s Southeast Regional Carbon Sequestration Partnership (SECARB). The DAS site includes three boreholes, an injection well and two monitoring wells. The project team selected the DAS site to examine CO2 sequestration multiphase fluid flow and pressure at the interwell scale in a brine reservoir. The time-lapse (TL) OVSP was part of an integrated monitoring program that included well logs, crosswell seismic, electrical resistance tomography and 4D surface seismic. The goals of the OVSP were to detect the CO2 induced change in seismic response, give information about the spatial distribution of CO2 near the injection well and to help tie the high-resolution borehole monitoring to the 4D surface data. The VSP data were acquired in well CFU 31-F1, which is the ~3200 m deep CO2 injection well at the DAS site. A preinjection survey was recorded in late 2009 with injection beginning in December 2009, and a post injection survey was conducted in Nov 2010 following injection of about 250 kT of CO2. The sensor array for both surveys was a 50-level, 3-component, Sercel MaxiWave system with 15 m (49 ft) spacing between levels. The source for both surveys was an accelerated weight drop, with different source trucks used for the two surveys. Consistent time-lapse processing was applied to both data sets. Time-lapse processing generated difference corridor stacks to investigate CO2 induced reflection amplitude changes from each source point. Corridor stacks were used for amplitude analysis to maximize the signal-to-noise ratio (S/N) for each shot point. Spatial variation in reflectivity (used to ‘map’ the plume) was similar in magnitude to the corridor stacks but, due to relatively lower S/N, the results were less consistent and more sensitive to processing and therefore are not presented. We examined the overall time-lapse repeatability of the OVSP data using three methods, the NRMS and Predictability (Pred) measures of Kragh and Christie (2002) and the signal-to-distortion ratio (SDR) method of Cantillo (2011). Because time-lapse noise was comparable to the observed change, multiple methods were used to analyze data reliability. The reflections from the top and base reservoir were identified on the corridor stacks by correlation with a synthetic response generated from the well logs. A consistent change in the corridor stack amplitudes from pre- to post-CO2 injection was found for both the top and base reservoir reflections on all ten shot locations analyzed. In addition to the well-log synthetic response, a finite-difference elastic wave propagation model was built based on rock/fluid properties obtained from well logs, with CO2 induced changes guided by time-lapse crosswell seismic tomography (Ajo-Franklin, et al., 2013) acquired at the DAS site. Time-lapse seismic tomography indicated that two reservoir zones were affected by the flood. The modeling established that interpretation of the VSP trough and peak event amplitudes as reflectivity from the top and bottom of reservoir is appropriate even with possible tuning effects. Importantly, this top/base change gives confidence in an interpretation that these changes arise from within the reservoir, not from bounding lithology. The modeled time-lapse change and the observed field data change from 10 shotpoints are in agreement for both magnitude and polarity of amplitude change for top and base of reservoir. Therefore, we conclude the stored CO2 has been successfully detected and, furthermore, the observed seismic reflection change can

  1. Reduced models of algae growth Heikki Haario,

    E-Print Network [OSTI]

    Bardsley, John

    Reduced models of algae growth Heikki Haario, Leonid Kalachev Marko Laine, Lappeenranta University of the phenomena studied. Here, in the case of algae growth modelling, we show how a systematic model reduction may: Algae growth modelling, asymptotic methods, model reduction, MCMC, Adaptive Markov chain Monte Carlo. 1

  2. Growth in Solar Means Growth in Ohio | 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,Executive CompensationEnergyGetDepartment1Sustained Pumping at2009ofGrowth

  3. Anomalously Slow Cross Symmetry Phase Relaxation, Thermalized Non-Equilibrated Matter and Quantum Computing Beyond the Quantum Chaos Border

    E-Print Network [OSTI]

    M. Bienert; J. Flores; S. Yu. Kun; T. H. Seligman

    2006-02-27

    Thermalization in highly excited quantum many-body system does not necessarily mean a complete memory loss of the way the system was formed. This effect may pave a way for a quantum computing, with a large number of qubits $n\\simeq 100$--1000, far beyond the quantum chaos border. One of the manifestations of such a thermalized non-equilibrated matter is revealed by a strong asymmetry around 90$^\\circ $ c.m. of evaporating proton yield in the Bi($\\gamma$,p) photonuclear reaction. The effect is described in terms of anomalously slow cross symmetry phase relaxation in highly excited quantum many-body systems with exponentially large Hilbert space dimensions. In the above reaction this phase relaxation is about eight orders of magnitude slower than energy relaxation (thermalization).

  4. Anomalously Slow Cross Symmetry Phase Relaxation, Thermalized Non-Equilibrated Matter and Quantum Computing Beyond the Quantum Chaos Border

    E-Print Network [OSTI]

    Bienert, M; Kun, S Yu; Seligman, T H

    2006-01-01

    Thermalization in highly excited quantum many-body system does not necessarily mean a complete memory loss of the way the system was formed. This effect may pave a way for a quantum computing, with a large number of qubits $n\\simeq 100$--1000, far beyond the quantum chaos border. One of the manifestations of such a thermalized non-equilibrated matter is revealed by a strong asymmetry around 90$^\\circ $ c.m. of evaporating proton yield in the Bi($\\gamma$,p) photonuclear reaction. The effect is described in terms of anomalously slow cross symmetry phase relaxation in highly excited quantum many-body systems with exponentially large Hilbert space dimensions. In the above reaction this phase relaxation is about eight orders of magnitude slower than energy relaxation (thermalization).

  5. Experimental study of a compact P-band coaxial relativistic backward wave oscillator with three periods slow wave structure

    SciTech Connect (OSTI)

    Gao Liang; Qian Baoliang; Ge Xingjun; Zhang Xiaoping; Jin Zhenxing [College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

    2012-08-15

    A compact P-band coaxial relativistic backward wave oscillator with three periods slow wave structure was investigated experimentally. The experimental results show that the frequency of the P-band coaxial relativistic backward wave oscillator is 897 MHz and the microwave power is 1.47 GW with an efficiency of about 32% in the case in which the diode voltage is 572 kV, the beam current is 8.0 kA, and the guide magnetic field is about 0.86 T. In addition, the device can generate a 3.14 GW microwave radiation as the guide magnetic field increases to 1.2 T at the diode voltage of 997 kV and the beam current of 15.3 kA. The experimental results are in good agreement with those obtained earlier by numerical simulations.

  6. Dynamic wettability alteration in immiscible two-phase flow in porous media: Effect on transport properties and critical slowing down

    E-Print Network [OSTI]

    Flovik, Vegard; Hansen, Alex

    2015-01-01

    The change in contact angles due to the injection of low salinity water or any other wettability altering agent in an oil-rich porous medium is modeled by a network model of disordered pores transporting two immiscible fluids. We introduce a dynamic wettability altering mechanism, where the time dependent wetting property of each pore is determined by the cumulative flow of water through it. Simulations are performed to reach steady-state for different possible alterations in the wetting angle ($\\theta$). We find that deviation from oil-wet conditions re-mobilizes the stuck clusters and increases the oil fractional flow. However, the rate of increase in the fractional flow depends strongly on $\\theta$ and as $\\theta\\to 90^\\circ$, a critical angle, the system shows critical slowing down which is characterized by two dynamic critical exponents.

  7. The origin of slow electron recombination processes in dye-sensitized solar cells with alumina barrier coatings

    SciTech Connect (OSTI)

    Fabregat-Santiago, Francisco; Garcia-Canadas, Jorge; Palomares, Emilio; Clifford, John N.; Haque, Saif A.; Durrant, James R.; Garcia-Belmonte, Germa; Bisquert, Juan [Departament de Ciencies Experimentals, Universitat Jaume I, 12080 Castello (Spain); Department of Chemistry, Imperial College, London SW7 2AY (United Kingdom); Institut de Ciencia Molecular Universitat de Valencia, C. P. 46100, Dr. Moliner 50, Burjassot, Valencia (Spain); Department of Chemistry, Imperial College, London SW7 2AY (United Kingdom); Departament de Ciencies Experimentals, Universitat Jaume I, 12080 Castello (Spain)

    2004-12-01

    We investigate the effect of a thin alumina coating of nanocrystalline TiO{sub 2} films on recombination dynamics of dye-sensitized solar cells. Both coated and uncoated cells were measured by a combination of techniques: transient absorption spectroscopy, electrochemical impedance spectroscopy, and open-circuit voltage decay. It is found that the alumina barrier reduces the recombination of photoinjected electrons to both dye cations and the oxidized redox couple. It is proposed that this observed retardation can be attributed primarily to two effects: almost complete passivation of surface trap states in TiO{sub 2} that are able to inject electrons to acceptor species, and slowing down by a factor of 3-4 the rate of interfacial charge transfer from conduction-band states.

  8. Differential regulation of apoptosis in slow and fast twitch muscles of aged female F344BN rats

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

    Rice, Kevin M.; Manne, Nandini D. P. K.; Gadde, Murali K.; Paturi, Satyanarayana; Arvapalli, Ravikumar; Blough, Eric

    2015-03-28

    Age-related muscle atrophy is characterized by decreases in muscle mass and is thought be mediated, at least in part, by increases in myocyte apoptosis. Recent data has demonstrated that the degree of muscle loss with aging may differ between males and females while other work has suggested that apoptosis as indicated by DNA fragmentation may be regulated differently in fast- and slow-twitch muscles. Herein, we investigate how aging affects the regulation of muscle apoptosis in the fast-twitch extensor digitorum longus (EDL) and slow-twitch soleus muscles of young (6-month), aged (26-month), and very aged (30-month) female Fischer 344/NNiaHSD × Brown Norway/BiNiamore »(F344BN) rats. Tissue sections were stained with hydroethidium for ROS and protein extract was subjected to immunoblotting for assessing apoptotic markers. Our data suggest that decreases in muscle mass were associated with increased DNA fragmentation (TUNEL positive) and increases in reactive oxygen species (ROS) as determined by hydroethidium staining in both the EDL and soleus. Similar to our previous work using aged male animals, we observed that the time course and magnitude of changes in Bax, Bcl-2, caspase-3, caspase-9, and cleavage of ?-fodrin protein were regulated differently between muscles. As a result, These data suggest that aging in the female F344BN rat is associated with decreases in muscle mass, elevations in ROS level, increased muscle cell DNA fragmentation, and alterations in cell membrane integrity and that apoptotic mechanisms may differ between fiber types.« less

  9. The Slow:Fast substitution ratio reveals changing patterns of natural selection in gamma-proteobacterial genomes

    SciTech Connect (OSTI)

    Alm, Eric; Shapiro, B. Jesse

    2009-04-15

    Different microbial species are thought to occupy distinct ecological niches, subjecting each species to unique selective constraints, which may leave a recognizable signal in their genomes. Thus, it may be possible to extract insight into the genetic basis of ecological differences among lineages by identifying unusual patterns of substitutions in orthologous gene or protein sequences. We use the ratio of substitutions in slow versus fast-evolving sites (nucleotides in DNA, or amino acids in protein sequence) to quantify deviations from the typical pattern of selective constraint observed across bacterial lineages. We propose that elevated S:F in one branch (an excess of slow-site substitutions) can indicate a functionally-relevant change, due to either positive selection or relaxed evolutionary constraint. In a genome-wide comparative study of gamma-proteobacterial proteins, we find that cell-surface proteins involved with motility and secretion functions often have high S:F ratios, while information-processing genes do not. Change in evolutionary constraints in some species is evidenced by increased S:F ratios within functionally-related sets of genes (e.g., energy production in Pseudomonas fluorescens), while other species apparently evolve mostly by drift (e.g., uniformly elevated S:F across most genes in Buchnera spp.). Overall, S:F reveals several species-specific, protein-level changes with potential functional/ecological importance. As microbial genome projects yield more species-rich gene-trees, the S:F ratio will become an increasingly powerful tool for uncovering functional genetic differences among species.

  10. Transgenic mice expressing mutant Pinin exhibit muscular dystrophy, nebulin deficiency and elevated expression of slow-type muscle fiber genes

    SciTech Connect (OSTI)

    Wu, Hsu-Pin; Hsu, Shu-Yuan [Department of Anatomy, Chang Gung University Medical College, Taiwan (China)] [Department of Anatomy, Chang Gung University Medical College, Taiwan (China); Wu, Wen-Ai; Hu, Ji-Wei [Transgenic Mouse Core Laboratory, Chang Gung University, Taiwan (China)] [Transgenic Mouse Core Laboratory, Chang Gung University, Taiwan (China); Ouyang, Pin, E-mail: ouyang@mail.cgu.edu.tw [Department of Anatomy, Chang Gung University Medical College, Taiwan (China) [Department of Anatomy, Chang Gung University Medical College, Taiwan (China); Transgenic Mouse Core Laboratory, Chang Gung University, Taiwan (China); Molecular Medicine Research Center, Chang Gung University, Taiwan (China)

    2014-01-03

    Highlights: •Pnn CCD domain functions as a dominant negative mutant regulating Pnn expression and function. •Pnn CCD mutant Tg mice have a muscle wasting phenotype during development and show dystrophic histological features. •Pnn mutant muscles are susceptible to slow fiber type gene transition and NEB reduction. •The Tg mouse generated by overexpression of the Pnn CCD domain displays many characteristics resembling NEB{sup +/?} mice. -- Abstract: Pinin (Pnn) is a nuclear speckle-associated SR-like protein. The N-terminal region of the Pnn protein sequence is highly conserved from mammals to insects, but the C-terminal RS domain-containing region is absent in lower species. The N-terminal coiled-coil domain (CCD) is, therefore, of interest not only from a functional point of view, but also from an evolutionarily standpoint. To explore the biological role of the Pnn CCD in a physiological context, we generated transgenic mice overexpressing Pnn mutant in skeletal muscle. We found that overexpression of the CCD reduces endogenous Pnn expression in cultured cell lines as well as in transgenic skeletal muscle fibers. Pnn mutant mice exhibited reduced body mass and impaired muscle function during development. Mutant skeletal muscles show dystrophic histological features with muscle fibers heavily loaded with centrally located myonuclei. Expression profiling and pathway analysis identified over-representation of genes in gene categories associated with muscle contraction, specifically those related to slow type fiber. In addition nebulin (NEB) expression level is repressed in Pnn mutant skeletal muscle. We conclude that Pnn downregulation in skeletal muscle causes a muscular dystrophic phenotype associated with NEB deficiency and the CCD domain is incapable of replacing full length Pnn in terms of functional capacity.

  11. Korea's Green Growth Strategy: Mitigating Climate Change and...

    Open Energy Info (EERE)

    Korea's Green Growth Strategy: Mitigating Climate Change and Developing New Growth Engines Jump to: navigation, search Name Korea's Green Growth Strategy: Mitigating Climate Change...

  12. Coastal and Waterfront Smart Growth and Hazard Mitigation Roundtable Report Coastal and Waterfront Smart Growth

    E-Print Network [OSTI]

    1 Coastal and Waterfront Smart Growth and Hazard Mitigation Roundtable Report Coastal and Waterfront Smart Growth and Hazard Mitigation Roundtable Report Achieving Hazard-Resilient Coastal & Waterfront Smart Growth #12;2 Achieving Hazard-Resilient Coastal & Waterfront Smart Growth www

  13. Platelet-derived growth factor and transforming growth factor beta synergistically potentiate inflammatory mediator synthesis by fibroblast-like synoviocytes

    E-Print Network [OSTI]

    Rosengren, Sanna; Corr, Maripat; Boyle, David L

    2010-01-01

    et al. , Platelet-derived growth factor and transformingactivated by platelet-derived growth factor. Clin Expmesylate inhibits platelet derived growth factor stimulated

  14. Non-Relativistic Approximation of Dirac Equation for Slow Fermions Coupled to the Chameleon and Torsion Fields in the Gravitational Field of the Earth

    E-Print Network [OSTI]

    Ivanov, A N

    2015-01-01

    We analyse a non-relativistic approximation of the Dirac equation for slow fermions, coupled to the chameleon field and torsion in the spacetime with the Schwarzschild metric, taken in the weak gravitational field of the Earth approximation. We follow the analysis of the Dirac equation in the curved spacetime with torsion, proposed by Kostelecky (Phys. Rev. D69, 105009 (2004)), and apply the Foldy--Wouthuysen transformations. We derive the effective low-energy gravitational potentials for slow fermions, coupled to the gravitational field of the Earth, the chameleon field and to torsion with minimal and non-minimal couplings.

  15. Deterministic tuning of slow-light in photonic-crystal waveguides through the C and L bands by atomic layer deposition

    E-Print Network [OSTI]

    Chen, Charlton J; Meric, Inanc; Shepard, Ken L; Wong, Chee Wei; Green, William M J; Vlasov, Yurii A; Assefa, Solomon

    2009-01-01

    We demonstrate digital tuning of the slow-light regime in silicon photonic-crystal waveguides by performing atomic layer deposition of hafnium oxide. The high group-index regime was deterministically controlled (red-shift of 140 +/- 10 pm per atomic layer) without affecting the group-velocity dispersion and third-order dispersion. Additionally, differential tuning of 110 +/- 30 pm per monolayer of the slow-light TE-like and TM-like modes was observed. This passive post-fabrication process has potential applications including the tuning of chip-scale optical interconnects, as well as Raman and parametric amplification.

  16. LanzaTech- Capturing Carbon. Fueling Growth.

    SciTech Connect (OSTI)

    2014-03-07

    LanzaTech will design a gas fermentation system that will significantly improve the rate at which methane gas is delivered to a biocatalyst. Current gas fermentation processes are not cost effective compared to other gas-to-liquid technologies because they are too slow for large-scale production. If successful, LanzaTech's system will process large amounts of methane at a high rate, reducing the energy inputs and costs associated with methane conversion.

  17. Well having inhibited microbial growth

    DOE Patents [OSTI]

    Lee, Brady D.; Dooley, Kirk J.

    2006-08-15

    The invention includes methods of inhibiting microbial growth in a well. A packing material containing a mixture of a first material and an antimicrobial agent is provided to at least partially fill a well bore. One or more access tubes are provided in an annular space around a casing within the well bore. The access tubes have a first terminal opening located at or above a ground surface and have a length that extends from the first terminal opening at least part of the depth of the well bore. The access tubes have a second terminal opening located within the well bore. An antimicrobial material is supplied into the well bore through the first terminal opening of the access tubes. The invention also includes well constructs.

  18. Differential growth of wrinkled biofilms

    E-Print Network [OSTI]

    Espeso, D R; Einarsson, B

    2015-01-01

    Biofilms are antibiotic-resistant bacterial aggregates that grow on moist surfaces and can trigger hospital-acquired infections. They provide a classical example in biology where the dynamics of cellular communities may be observed and studied. Gene expression regulates cell division and differentiation, which affect the biofilm architecture. Mechanical and chemical processes shape the resulting structure. We gain insight into the interplay between cellular and mechanical processes during biofilm development on air-agar interfaces by means of a hybrid model. Cellular behavior is governed by stochastic rules informed by a cascade of concentration fields for nutrients, waste and autoinducers. Cellular differentiation and death alter the structure and the mechanical properties of the biofilm, which is deformed according to Foppl-Von Karman equations informed by cellular processes and the interaction with the substratum. Stiffness gradients due to growth and swelling produce wrinkle branching. We are able to repr...

  19. Controlled growth of semiconductor crystals

    DOE Patents [OSTI]

    Bourret-Courchesne, E.D.

    1992-07-21

    A method is disclosed for growth of III-V, II-VI and related semiconductor single crystals that suppresses random nucleation and sticking of the semiconductor melt at the crucible walls. Small pieces of an oxide of boron B[sub x]O[sub y] are dispersed throughout the comminuted solid semiconductor charge in the crucible, with the oxide of boron preferably having water content of at least 600 ppm. The crucible temperature is first raised to a temperature greater than the melt temperature T[sub m1] of the oxide of boron (T[sub m1]=723 K for boron oxide B[sub 2]O[sub 3]), and the oxide of boron is allowed to melt and form a reasonably uniform liquid layer between the crucible walls and bottom surfaces and the still-solid semiconductor charge. The temperature is then raised to approximately the melt temperature T[sub m2] of the semiconductor charge material, and crystal growth proceeds by a liquid encapsulated, vertical gradient freeze process. About half of the crystals grown have a dislocation density of less than 1000/cm[sup 2]. If the oxide of boron has water content less than 600 ppm, the crucible material should include boron nitride, a layer of the inner surface of the crucible should be oxidized before the oxide of boron in the crucible charge is melted, and the sum of thicknesses of the solid boron oxide layer and liquid boron oxide layer should be at least 50 [mu]m. 7 figs.

  20. Controlled growth of semiconductor crystals

    DOE Patents [OSTI]

    Bourret-Courchesne, Edith D. (Richmond, CA)

    1992-01-01

    A method for growth of III-V, II-VI and related semiconductor single crystals that suppresses random nucleation and sticking of the semiconductor melt at the crucible walls. Small pieces of an oxide of boron B.sub.x O.sub.y are dispersed throughout the comminuted solid semiconductor charge in the crucible, with the oxide of boron preferably having water content of at least 600 ppm. The crucible temperature is first raised to a temperature greater than the melt temperature T.sub.m1 of the oxide of boron (T.sub.m1 =723.degree. K. for boron oxide B.sub.2 O.sub.3), and the oxide of boron is allowed to melt and form a reasonably uniform liquid layer between the crucible walls and bottom surfaces and the still-solid semiconductor charge. The temperature is then raised to approximately the melt temperature T.sub.m2 of the semiconductor charge material, and crystal growth proceeds by a liquid encapsulated, vertical gradient freeze process. About half of the crystals grown have a dislocation density of less than 1000/cm.sup.2. If the oxide of boron has water content less than 600 ppm, the crucible material should include boron nitride, a layer of the inner surface of the crucible should be oxidized before the oxide of boron in the crucible charge is melted, and the sum of thicknesses of the solid boron oxide layer and liquid boron oxide layer should be at least 50 .mu.m.

  1. Enhanced Particle Capture in Slow Sand Filters using a Filter Aid O b j e c t i v e s

    E-Print Network [OSTI]

    was obtained by extracting an acid soluble polymer from surface water seston. The filter aid enhances particle removal from raw source waters by modifing the filter media surface properties and appearsEnhanced Particle Capture in Slow Sand Filters using a Filter Aid O b j e c t i v e s The main

  2. Evaluation of the irising effect of a slow-gating intensified charge-coupled device on laser-induced incandescence measurements of soot

    SciTech Connect (OSTI)

    Shaddix, Christopher R.; Williams, Timothy C. [Combustion Research Facility, Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550 (United States)

    2009-03-15

    Intensified charge-coupled devices (ICCDs) are used extensively in many scientific and engineering environments to image weak or temporally short optical events. To optimize the quantum efficiency of light collection, many of these devices are chosen to have characteristic intensifier gate times that are relatively slow, on the order of tens of nanoseconds. For many measurements associated with nanosecond laser sources, such as scattering-based diagnostics and most laser-induced fluorescence applications, the signals rise and decay sufficiently fast during and after the laser pulse that the intensifier gate may be set to close after the cessation of the signal and still effectively reject interferences associated with longer time scales. However, the relatively long time scale and complex temporal response of laser-induced incandescence (LII) of nanometer-sized particles (such as soot) offer a difficult challenge to the use of slow-gating ICCDs for quantitative measurements. In this paper, ultraviolet Rayleigh scattering imaging is used to quantify the irising effect of a slow-gating scientific ICCD camera, and an analysis is conducted of LII image data collected with this camera as a function of intensifier gate width. The results demonstrate that relatively prompt LII detection, generally desirable to minimize the influences of particle size and local gas pressure and temperature on measurements of the soot volume fraction, is strongly influenced by the irising effect of slow-gating ICCDs.

  3. New J. Phys. 17 (2015) 023071 doi:10.1088/1367-2630/17/2/023071 Quantum thermalization: anomalous slow relaxation due to

    E-Print Network [OSTI]

    Cohen, Doron

    2015-01-01

    -like dynamics in energy space. The connection between thermalization and chaotic ergodicity is well make thermalization a slow and intricate process [2­4]. By contrast quantum anomalies are directly the available states, so that all transitions contribute to the diffusive energy spreading process. However

  4. IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 18, NO. 4, JULY 2003 1063 An Investigation Into the Fast-and Slow-Scale

    E-Print Network [OSTI]

    Mazumder, Sudip K.

    Into the Fast- and Slow-Scale Instabilities of a Single Phase Bidirectional Boost Converter Sudip K. Mazumder for a single phase bidi- rectional boost converter. This map enables the analysis of the dy- namics. Index Terms--Bifurcation, boost, converter, Poincare map, single phase. I. INTRODUCTION SINGLE

  5. India Ink Staining 1. Place wet or dried blot in a small volume of PBSTw. Place blot on surface of liquid to allow slow and

    E-Print Network [OSTI]

    Aris, John P.

    51 India Ink Staining 1. Place wet or dried blot in a small volume of PBSTw. Place blot on surface of liquid to allow slow and even wetting. 2. Add India Ink dropwise while swirling buffer (up to 0.1% final

  6. arXiv:0704.3990v1[physics.class-ph]30Apr2007 On capillary-gravity waves generated by a slow moving object

    E-Print Network [OSTI]

    Shepelyansky, Dima

    arXiv:0704.3990v1[physics.class-ph]30Apr2007 On capillary-gravity waves generated by a slow moving for the complicated wave pattern generated at the free surface of a still liquid by a moving disturbance]. The propagating waves generated by the moving dis- turbance continuously remove energy to infinity. Con- sequently

  7. arXiv:0910.2237v1[astro-ph.CO]12Oct2009 Generalized Slow Roll for Large Power Spectrum Features

    E-Print Network [OSTI]

    Hu, Wayne

    approximation provides a model-independent technique for computing the initial curvature power spectrum, features in the inflaton potential produce features in the power spectrum. Glitches in the observedarXiv:0910.2237v1[astro-ph.CO]12Oct2009 Generalized Slow Roll for Large Power Spectrum Features

  8. Slow Vertical Deposition of Colloidal Crystals: A Langmuir-Blodgett Robert G. Shimmin, Alexander J. DiMauro, and Paul V. Braun*

    E-Print Network [OSTI]

    Braun, Paul

    Slow Vertical Deposition of Colloidal Crystals: A Langmuir-Blodgett Process? Robert G. Shimmin thick. We observe that the thickness of colloidal crystals vertically deposited from 1 µm diameter colloidal crystals, effects indistinguishable from those of doubling the concentration of the colloidal

  9. Conflicting structural and geochronological data from the Ibituruna quartz-syenite (SE Brazil): Effect of protracted "hot" orogeny and slow cooling rate?

    E-Print Network [OSTI]

    Cattin, Rodolphe

    Conflicting structural and geochronological data from the Ibituruna quartz-syenite (SE Brazil-Pb and 40Ar-39Ar geochronology Slow cooling rate SE-Brazil neoproterozoic orogeny The Ibituruna quartz-rock. Unexpectedly, geochronological data suggest a rather different conclusion. LA-ICP-MS and SHRIMP ages of zircons

  10. Synthetic heparin-binding growth factor analogs

    DOE Patents [OSTI]

    Pena, Louis A.; Zamora, Paul; Lin, Xinhua; Glass, John D.

    2007-01-23

    The invention provides synthetic heparin-binding growth factor analogs having at least one peptide chain that binds a heparin-binding growth factor receptor, covalently bound to a hydrophobic linker, which is in turn covalently bound to a non-signaling peptide that includes a heparin-binding domain. The synthetic heparin-binding growth factor analogs are useful as soluble biologics or as surface coatings for medical devices.

  11. Interface control and snow crystal growth

    E-Print Network [OSTI]

    Jessica Li; Laura P. Schaposnik

    2015-05-08

    The growth of snow crystals is dependent on the temperature and saturation of the environment. In the case of dendrites, Reiter's local two-dimensional model provides a realistic approach to the study of dendrite growth. In this paper we obtain a new geometric rule that incorporates interface control, a basic mechanism of crystallization that is not taken into account in the original Reiter's model. By defining two new variables, growth latency and growth direction, our improved model gives a realistic model not only for dendrite but also for plate forms.

  12. Graphene Growth on Low Carbon Solubility Metals

    E-Print Network [OSTI]

    Wofford, Joseph Monroe

    2012-01-01

    graphene is both a semimetal and a zero bandgap semiconductorgraphene growth. Ge wafers are also available with the exceptional surface qualities common to semiconductor

  13. "Conflict Between Economic Growth and Environmental Protection...

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

    Dr. Bryan Czech, resident, Center for the Advancement of the Steady State of the Economy Presentation: Presentation Abstract: Abstract Conflict Between Economic Growth and...

  14. Shaping metal nanocrystals through epitaxial seeded growth

    E-Print Network [OSTI]

    Habas, Susan E.; Lee, Hyunjoo; Radmilovic, Velimir; Somorjai, Gabor A.; Yang, Peidong

    2008-01-01

    Structural Evolution in Metal Oxide/Semiconductor Colloidalasymmetric one-sided metal-tipped semiconductor nanocrystalGrowth of Magnetic-Metal- Functionalized Semiconductor Oxide

  15. The Very Long Run Economic Growth

    E-Print Network [OSTI]

    Wu, Lemin

    2013-01-01

    Growth before the Industrial Revolution. ” Journal of Law2001. “ Was an Industrial Revolution Inevitable? EconomicThe British Industrial Revolution in Global Perspective. ”

  16. Relic gravitational waves in the frame of slow-roll inflation with a power-law potential and the detection

    E-Print Network [OSTI]

    Ming-Lei Tong

    2013-02-22

    We obtained the analytic solutions of relic gravitational waves (RGWs) for the slow-roll inflation with a power-law form potential of the scalar field, $V=\\lambda\\phi^n$. Based on a reasonable range of $n$ constrained by cosmic microwave background (CMB) observations, we give tight constraints of the tensor-to-scalar ratio $r$ and the inflation expansion index $\\beta$ for the fixed scalar spectral index $n_s$. Even though, the spectrum of RGWs in low frequencies is hardly depends on any parameters, the high frequency parts will be affected by several parameters, such as $n_s$, the reheating temperature $T_{RH}$ and the index $\\beta_s$ describing the expansion from the end of inflation to the reheating process. We analyzed in detail all the factors which would affect the spectrum of RGWs in high frequencies including the quantum normalization. We found that the future GW detectors SKA, eLISA, BBO and DECIGO are promising to catch the signals of RGWs. Furthermore, BBO and DECIGO have the potential not only to distinguish the spectra with different parameters but also to examine the validity of the quantum normalization.

  17. Line-driven winds revisited in the context of Be stars: ?-slow solutions with high k values

    SciTech Connect (OSTI)

    Silaj, J.; Jones, C. E.; Curé, M.

    2014-11-01

    The standard, or fast, solutions of m-CAK line-driven wind theory cannot account for slowly outflowing disks like the ones that surround Be stars. It has been previously shown that there exists another family of solutions—the ?-slow solutions—that is characterized by much slower terminal velocities and higher mass-loss rates. We have solved the one-dimensional m-CAK hydrodynamical equation of rotating radiation-driven winds for this latter solution, starting from standard values of the line force parameters (?, k, and ?), and then systematically varying the values of ? and k. Terminal velocities and mass-loss rates that are in good agreement with those found in Be stars are obtained from the solutions with lower ? and higher k values. Furthermore, the equatorial densities of such solutions are comparable to those that are typically assumed in ad hoc models. For very high values of k, we find that the wind solutions exhibit a new kind of behavior.

  18. Effect of non-uniform slow wave structure in a relativistic backward wave oscillator with a resonant reflector

    SciTech Connect (OSTI)

    Chen, Changhua; Xiao, Renzhen; Sun, Jun; Song, Zhimin; Huo, Shaofei; Bai, Xianchen; Shi, Yanchao; Liu, Guozhi

    2013-11-15

    This paper provides a fresh insight into the effect of non-uniform slow wave structure (SWS) used in a relativistic backward wave oscillator (RBWO) with a resonant reflector. Compared with the uniform SWS, the reflection coefficient of the non-uniform SWS is higher, leading to a lower modulating electric field in the resonant reflector and a larger distance to maximize the modulation current. Moreover, for both types of RBWOs, stronger standing-wave field takes place at the rear part of the SWS. In addition, besides Cerenkov effects, the energy conversion process in the RBWO strongly depends on transit time effects. Thus, the matching condition between the distributions of harmonic current and standing wave field provides a profound influence on the beam-wave interaction. In the non-uniform RBWO, the region with a stronger standing wave field corresponds to a higher fundamental harmonic current distribution. Particle-in-cell simulations show that with a diode voltage of 1.02 MV and beam current of 13.2 kA, a microwave power of 4 GW has been obtained, compared to that of 3 GW in the uniform RBWO.

  19. Effective Low-Energy Potential for Slow Dirac Fermions in Einstein-Cartan Gravity with Torsion and Chameleon

    E-Print Network [OSTI]

    Ivanov, A N

    2015-01-01

    We derive the most general effective low-energy potential to order O(1/m) for slow Dirac fermions with mass m, coupled to gravitational, chameleon and torsion fields in the Einstein-Cartan gravity. The obtained results can be applied to the experimental analysis of gravitational, chameleon and torsion interactions in terrestrial laboratories. We discuss the use of rotating coordinate systems, caused by rotations of devices, for measurements of the torsion vector and tensor components, caused by minimal torsion--fermion couplings (Ivanov and Wellenzohn, Phys. Rev. D92, 065006 (2015)). Using the most general form of a metric tensor of curved spacetimes in rotating coordinate systems, proposed by Obukhov, Silenko, and Teryaev (Phys. Rev. D84, 024025 (2011)), we extend this metric by the inclusion of the chameleon field and calculate the set of vierbein fields, in terms of which Dirac fermions couple to torsion vector and tensor components through minimal torsion-fermion couplings. For such a set of vierbein fiel...

  20. Running Jobs Intermittently Slow

    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-Throughput Analysis of Protein StructuresMaintenance / AP Spear Down1016.

  1. Journal of Crystal Growth 304 (2007) 399401 Growth of high quality, epitaxial InSb nanowires

    E-Print Network [OSTI]

    Wang, Zhong L.

    2007-01-01

    Journal of Crystal Growth 304 (2007) 399­401 Growth of high quality, epitaxial InSb nanowires Hyun, Washington, DC. 20375, USA b School of Materials Science and Engineering, Georgia Institute of Technology March 2007 Communicated by R.M. Biefeld Available online 1 April 2007 Abstract The growth of In

  2. Graphene Growth on Low Carbon Solubility Metals

    E-Print Network [OSTI]

    Wofford, Joseph Monroe

    2012-01-01

    preparation of Cu substrates will lead to larger grapheneGraphene Growth on Cu(100), Cu(111), and Au(111) Substrate selection and preparationGraphene Growth on Cu(100), Cu(111), and Au(111) 3.1 Substrate selection and preparation

  3. SMOOTHING SPLINE GROWTH CURVES WITH COVARIATES

    E-Print Network [OSTI]

    #11;ect growth curves. Due to the repeated measurement structure of his model, he is able to determine adapt the interactive spline model of Wahba to growth curves with covariates. The smoothing spline smoothing spline models (Ch. 10, Wahba (1990)). In this brief article, we adapt interactive spline models

  4. Limiting Abnormal Mold Growth in Buildings 

    E-Print Network [OSTI]

    Graham, C. W.

    2002-01-01

    in wood, or rusting and corrosion of metals. Abnormal mold or fungal growth, then, can create major problems for building owners. Moisture is the key factor that building designers and owners can manage in order to limit mold growth. This paper introduces...

  5. Export Growth and Credit Constraints Tibor Besedes

    E-Print Network [OSTI]

    Das, Suman

    Export Growth and Credit Constraints Tibor Besedes Byung-Cheol Kim Volodymyr Lugovskyy§ May 14, 2014 Abstract We investigate the effect of credit constraints on the growth of exports at the micro of exporting, but not in later stages. Our empirical results using product level data on exports to twelve

  6. Communications CVD Growth of Boron Nitride Nanotubes

    E-Print Network [OSTI]

    in dense thickets on and about nickel boride catalyst particles at 1100 °C. The BN nanotubes resemble thoseCommunications CVD Growth of Boron Nitride Nanotubes Oleg R. Lourie, Carolyn R. Jones, Bart M Manuscript Received May 9, 2000 We describe BN-nanotube growth by chemical vapor deposition (CVD) using

  7. Economic Growth, Physical Limits and Liveability

    E-Print Network [OSTI]

    Economic Growth, Physical Limits and Liveability: Can Metro Vancouver Achieve all Three? by Jeremy of Thesis: Economic Growth, Physical Limits and Liveability: Can Metro Vancouver Achieve all Three. The Local Energy scenario adds a local energy limit. For each scenario I assume continuous economic

  8. Fish production: integrating growth, mortality, and

    E-Print Network [OSTI]

    Limburg, Karin E.

    1 Fish production: integrating growth, mortality, and population density K. Limburg lecture notes, Fisheries Science Outline: 1. Biological production ­ a critical ecological parameter 2. How to compute production from a simple biomass model 3. Production:biomass ratios 4. Growth: mortality ratios Reading

  9. Structural Controls on Growth Stratigraphy in Contractional

    E-Print Network [OSTI]

    Connors, Christopher D.

    Structural Controls on Growth Stratigraphy in Contractional Fault-related Folds John H. Shaw Dept stratigraphy. An understanding of this interplay between local deformation and dep- osition helps us infer on growth stratigraphy in contractional fault-related folds, in K. R. McClay, ed., Thrust tectonics

  10. Digital electronic bone growth stimulator

    DOE Patents [OSTI]

    Kronberg, J.W.

    1993-01-01

    The present invention relates to the electrical treatment of biological tissue. In particular, the present invention discloses a device that produces discrete electrical pulse trains for treating osteoporosis and accelerating bone growth. According to its major aspects and broadly stated, the present invention consists of an electrical circuit configuration capable of generating Bassett-type waveforms shown with alternative signals provide for the treatment of either fractured bones or osteoporosis. The signal generator comprises a quartz clock, an oscillator circuit, a binary divider chain, and a plurality of simple, digital logic gates. Signals are delivered efficiently, with little or no distortion, and uniformly distributed throughout the area of injury. Perferably, power is furnished by widely available and inexpensive radio batteries, needing replacement only once in several days. The present invention can be affixed to a medical cast without a great increase in either weight or bulk. Also, the disclosed stimulator can be used to treat osteoporosis or to strengthen a healing bone after the cast has been removed by attaching the device to the patient`s skin or clothing.

  11. Surveillance of Craniopharyngioma Cyst Growth in Children Treated With Proton Radiotherapy

    SciTech Connect (OSTI)

    Winkfield, Karen M. [Harvard Radiation Oncology Program, Harvard Medical School, Boston, MA (United States)], E-mail: kwinkfield@partners.org; Linsenmeier, Claudia; Yock, Torunn I. [Department of Radiation Oncology, Massachusetts General Hospital, Boston, MA (United States); Grant, P. Ellen [Department of Radiology, Massachusetts General Hospital, Boston, MA (United States); Yeap, Beow Y. Sc.D. [Department of Medicine, Massachusetts General Hospital, Boston, MA (United States); Butler, William E. [Department of Neurosurgery, Massachusetts General Hospital, Boston, MA (United States); Tarbell, Nancy J. [Department of Radiation Oncology, Massachusetts General Hospital, Boston, MA (United States)

    2009-03-01

    Purpose: Craniopharyngiomas are benign, slow-growing tumors that frequently contain a cystic component. Even with gross total resection, the cyst can reform and cause symptoms. Fluctuations in cyst volume during radiotherapy (RT) can affect treatment planning and delivery. The aim of this study was to report our experience with cyst enlargement during conformal proton RT for children with craniopharyngioma and to make recommendations regarding mid-treatment surveillance. Methods and Materials: Between January 2001 and August 2007, 24 children (aged {<=}18 years) underwent proton RT at the Massachusetts General Hospital for craniopharyngioma. For all 24 patients, tumor size on magnetic resonance imaging and/or computed tomography was measured before and after RT. Surveillance imaging was available for review on 17 patients. During RT, cyst growth was assessed to determine whether the treatment fields needed to be altered. Results: Of the 17 children who underwent repeat imaging during RT, 6 required intervention because of changes in cyst dimensions. Four patients (24%) had cyst growth beyond the original treatment fields, requiring enlargement of the treatment plan. One patient's treatment field was reduced after a decreased in cyst size. Cyst drainage was performed in another patient to avoid enlargement of the treatment fields. Conclusion: In patients undergoing highly conformal RT for craniopharyngiomas with cysts, routine imaging during treatment is recommended. Surveillance imaging should be performed at least every 2 weeks during proton RT in an attempt to avoid marginal failure. Craniopharyngiomas with large cystic components or enlargement during treatment might require weekly imaging.

  12. 3D simulations of wet foam coarsening evidence a self similar growth regime

    E-Print Network [OSTI]

    Gilberto L. Thomas; Julio M. Belmonte; François Graner; James A. Glazier; Rita M. C. de Almeida

    2015-02-11

    In wet liquid foams, slow diffusion of gas through bubble walls changes bubble pressure, volume and wall curvature. Large bubbles grow at the expenses of smaller ones. The smaller the bubble, the faster it shrinks. As the number of bubbles in a given volume decreases in time, the average bubble size increases: i.e. the foam coarsens. During coarsening, bubbles also move relative to each other, changing bubble topology and shape, while liquid moves within the regions separating the bubbles. Analyzing the combined effects of these mechanisms requires examining a volume with enough bubbles to provide appropriate statistics throughout coarsening. Using a Cellular Potts model, we simulate these mechanisms during the evolution of three-dimensional foams with wetnesses of $\\phi=0.00$, $0.05$ and $ 0.20$. We represent the liquid phase as an ensemble of many small fluid particles, which allows us to monitor liquid flow in the region between bubbles. The simulations begin with $2 \\times 10^5$ bubbles for $\\phi = 0.00$ and $1.25 \\times 10^5$ bubbles for $\\phi = 0.05$ and $0.20$, allowing us to track the distribution functions for bubble size, topology and growth rate over two and a half decades of volume change. All simulations eventually reach a self-similar growth regime, with the distribution functions time independent and the number of bubbles decreasing with time as a power law whose exponent depends on the wetness.

  13. Time-resolved analysis of Fermi gamma-ray bursts with fast- and slow-cooled synchrotron photon models

    SciTech Connect (OSTI)

    Burgess, J. M.; Preece, R. D.; Connaughton, V.; Briggs, M. S.; Goldstein, A.; Bhat, P. N.; Paciesas, W. S.; Xiong, S. [University of Alabama in Huntsville, 320 Sparkman Drive, Huntsville, AL 35899 (United States); Greiner, J.; Gruber, D.; Kienlin, A.; Rau, A. [Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse 1, D-85748 Garching (Germany); Kouveliotou, C. [Space Science Office, VP62, NASA/Marshall Space Flight Center, Huntsville, AL 35812 (United States); McGlynn, S. [Exzellence Cluster "Universe," Technische Universitt Mnchen, Boltzmannstrasse 2, D-85748, Garching (Germany); Meegan, C. A. [Universities Space Research Association, 320 Sparkman Drive, Huntsville, AL 35899 (United States); Axelsson, M. [Department of Astronomy, Stockholm University, SE-106 91 Stockholm (Sweden); Baring, M. G. [Rice University, Department of Physics and Astronomy, MS-108, P.O. Box 1892, Houston, TX 77251 (United States); Dermer, C. D. [Space Science Division, Naval Research Laboratory, Washington, DC 20375-5352 (United States); Iyyani, S. [The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova, SE-106 91 Stockholm (Sweden); Kocevski, D., E-mail: james.m.burgess@nasa.gov, E-mail: Rob.Preece@nasa.gov, E-mail: shabuiyyani@gmail.com, E-mail: baring@rice.edu [W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics, and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States); and others

    2014-03-20

    Time-resolved spectroscopy is performed on eight bright, long gamma-ray bursts (GRBs) dominated by single emission pulses that were observed with the Fermi Gamma-Ray Space Telescope. Fitting the prompt radiation of GRBs by empirical spectral forms such as the Band function leads to ambiguous conclusions about the physical model for the prompt radiation. Moreover, the Band function is often inadequate to fit the data. The GRB spectrum is therefore modeled with two emission components consisting of optically thin non-thermal synchrotron radiation from relativistic electrons and, when significant, thermal emission from a jet photosphere, which is represented by a blackbody spectrum. To produce an acceptable fit, the addition of a blackbody component is required in five out of the eight cases. We also find that the low-energy spectral index ? is consistent with a synchrotron component with ? = –0.81 ± 0.1. This value lies between the limiting values of ? = –2/3 and ? = –3/2 for electrons in the slow- and fast-cooling regimes, respectively, suggesting ongoing acceleration at the emission site. The blackbody component can be more significant when using a physical synchrotron model instead of the Band function, illustrating that the Band function does not serve as a good proxy for a non-thermal synchrotron emission component. The temperature and characteristic emission-region size of the blackbody component are found to, respectively, decrease and increase as power laws with time during the prompt phase. In addition, we find that the blackbody and non-thermal components have separate temporal behaviors as far as their respective flux and spectral evolutions.

  14. Tremor–genic slow slip regions may be deeper and warmer and may slip slower than non–tremor–genic regions

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

    Montgomery-Brown, E. K.; Syracuse, E. M.

    2015-09-17

    The slow slip events (SSEs) are observed worldwide and often coincide with tectonic tremor. Notable examples of SSEs lacking observed tectonic tremor, however, occur beneath Kilauea Volcano, Hawaii, the Boso Peninsula, Japan, {near San Juan Bautista on the San Andreas Fault, California, and recently in Central Ecuador. These SSEs are similar to other worldwide SSEs in many ways (e.g., size or duration), but lack the concurrent tectonic tremor observed elsewhere; instead they trigger swarms of regular earthquakes. We investigate the physical conditions that may distinguish these non-tremor-genic SSEs from those associated with tectonic tremor including: slip velocity, pressure, temperature, fluidsmore »and fault asperities, although we cannot eliminate the possibility that tectonic tremor may be obscured in highly attenuating regions. Slip velocities of SSEs at Kilauea Volcano (~10?? m/s) and Boso Peninsula (~10?? m/s) are among the fastest SSEs worldwide. Kilauea Volcano, the Boso Peninsula and Central Ecuador are also among the shallowest SSEs worldwide, and thus have lower confining pressures and cooler temperatures in their respective slow slip zones. {Fluids also likely contribute to tremor generation, and no corresponding zone of high vp/vs has been noted at Kilauea or Boso. We suggest that the relatively faster slip velocities at Kilauea Volcano and the Boso Peninsula result from specific physical conditions that may also be responsible for triggering swarms of regular earthquakes adjacent to the slow slip, while different conditions produce slower SSE velocities elsewhere and trigger tectonic tremor.« less

  15. Tremor–genic slow slip regions may be deeper and warmer and may slip slower than non–tremor–genic regions

    SciTech Connect (OSTI)

    Montgomery-Brown, E. K.; Syracuse, E. M.

    2015-09-17

    The slow slip events (SSEs) are observed worldwide and often coincide with tectonic tremor. Notable examples of SSEs lacking observed tectonic tremor, however, occur beneath Kilauea Volcano, Hawaii, the Boso Peninsula, Japan, {near San Juan Bautista on the San Andreas Fault, California, and recently in Central Ecuador. These SSEs are similar to other worldwide SSEs in many ways (e.g., size or duration), but lack the concurrent tectonic tremor observed elsewhere; instead they trigger swarms of regular earthquakes. We investigate the physical conditions that may distinguish these non-tremor-genic SSEs from those associated with tectonic tremor including: slip velocity, pressure, temperature, fluids and fault asperities, although we cannot eliminate the possibility that tectonic tremor may be obscured in highly attenuating regions. Slip velocities of SSEs at Kilauea Volcano (~10?? m/s) and Boso Peninsula (~10?? m/s) are among the fastest SSEs worldwide. Kilauea Volcano, the Boso Peninsula and Central Ecuador are also among the shallowest SSEs worldwide, and thus have lower confining pressures and cooler temperatures in their respective slow slip zones. {Fluids also likely contribute to tremor generation, and no corresponding zone of high vp/vs has been noted at Kilauea or Boso. We suggest that the relatively faster slip velocities at Kilauea Volcano and the Boso Peninsula result from specific physical conditions that may also be responsible for triggering swarms of regular earthquakes adjacent to the slow slip, while different conditions produce slower SSE velocities elsewhere and trigger tectonic tremor.

  16. Energy dump of the ATLAS superconducting system simulations of electrical and thermal behaviour of magnet system at slow- and fast dump

    E-Print Network [OSTI]

    van Beek, Martijn; Dudarev, A

    During the slow dump (discharge) of the Barrel Toroidal (superconducting) magnet of the ATLAS detector, the control system gave an alarm that the differences between the voltages over the conductors were too high. The alarm was not due to any danger, because of some sort of phenomenon observed in the first few seconds after start of the discharge. A possible explanation of the differences of the coil voltages is that the changing current through the conductors may cause induced currents in the coil casing around. The goal was to make a simulation of the electrical behaviour of the magnet system during a slow dump. In this way, an explanation can be found for the start phenomenon of the slow dump of the Barrel Toroid. Some extra analyses on the measurements were performed to describe the energy dissipation during a fast dump. This is done by calculating the resistance of the coils during the dump. With the maximum resistance, the maximum temperature can be estimated, which says something about the enthalpy of ...

  17. Hypersonic Measurements of Roughness-Induced Transient Growth 

    E-Print Network [OSTI]

    Sharp, Nicole Susanne

    2014-04-17

    The effects of surface roughness on boundary-layer disturbance growth and laminar-to-turbulent transition are not well understood, especially in hypersonic boundary layers. The transient growth mechanism that produces algebraic growth of stream wise...

  18. Reallocating innovative resources around growth bottlenecks

    E-Print Network [OSTI]

    Bresnahan, Timothy

    Economy-wide increasing returns to scale embodied in a general purpose technology (GPT) and its applications are often a key source of long-run growth. Yet the successful exploitation of increasing returns calls for ...

  19. Unlocking Growth Opportunities for Minority Businesses Through...

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

    around 80,000 a year and 5.4 million of economic growth. At the Energy Innovation Portal, the Department's hub for technology transfer resources, minority owned firms and...

  20. Geothermal Energy Growth Continues, Industry Survey Reports

    Broader source: Energy.gov [DOE]

    A survey released by the Geothermal Energy Association (GEA) shows continued growth in the number of new geothermal power projects under development in the United States, a 20% increase since January of this year.

  1. Nanoscale Surface Topography to Guide Bone Growth

    E-Print Network [OSTI]

    Nanoscale Surface Topography to Guide Bone Growth P R O J E C T L E A D E R : Jirun Sun (American T S Designed and fabricated devices with nanoscale surface topography. Controlled cell alignment by varying

  2. Modeling plant growth and development Przemyslaw Prusinkiewicz

    E-Print Network [OSTI]

    Prusinkiewicz, Przemyslaw

    Modeling plant growth and development Przemyslaw Prusinkiewicz Department of Computer Science plant models or "virtual plants" are increasingly seen as a useful tool for comprehending complex relationships between gene function, plant physiology, plant development, and the resulting plant form

  3. Selective anisotropic growth of zeolite crystals 

    E-Print Network [OSTI]

    Desai, Tasha April

    2013-02-22

    Precise control over particle size and morphology is emerging as a critical issue in the design of nanostructured materials. The explosive growth of nanoparticle synthesis is a good example of this. As material chemists have developed the ability...

  4. GROWTH OF SOUTH AFRICAN AFRICA' ~-' ,, I

    E-Print Network [OSTI]

    GROWTH OF SOUTH AFRICAN FISHERIES -SQUTH-: WEST .-' AFRICA' ~-' ,, I I , I :--. .,' UN I .............................................. Regrouping of Interests ······························ Fisheries Development Corporation of South Africa, Ltd and the trawling interests, respectively. The quasi-official Fisheries Develop- ment Corporation of South Africa

  5. Introduction: California's Growth: An Uncertain Future

    E-Print Network [OSTI]

    Teitz, Michael B.

    2008-01-01

    s Growth: An Uncertain Future BY MICHAEL B. TEITZ Editor'shave to be California’s future? Clearly, not so. This ofat the issue of accommodating future tions within them, for

  6. Graphene Growth on Low Carbon Solubility Metals

    E-Print Network [OSTI]

    Wofford, Joseph Monroe

    2012-01-01

    growth. LEEM micrographs and LEED patterns showing thespecies of sp 2 bonded C. LEED from a large region of aof rotational variants. LEED from a R0 oriented domain of

  7. Growth of the NGV Market: Lessons Learned Roadmap for Infrastructure...

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

    Growth of the NGV Market: Lessons Learned Roadmap for Infrastructure Development Growth of the NGV Market: Lessons Learned Roadmap for Infrastructure Development Presented at...

  8. Vietnam-Strengthening Planning Capacity for Low Carbon Growth...

    Open Energy Info (EERE)

    Growth in Developing Asia Jump to: navigation, search Name Vietnam-Strengthening Planning Capacity for Low Carbon Growth in Developing Asia AgencyCompany Organization Asian...

  9. Suppression of Grain Boundaries in Graphene Growth on Superstructured...

    Office of Scientific and Technical Information (OSTI)

    Suppression of Grain Boundaries in Graphene Growth on Superstructured Mn-Cu(111) Surface Prev Next Title: Suppression of Grain Boundaries in Graphene Growth on...

  10. Atomistic surface erosion and thin film growth modelled over...

    Office of Scientific and Technical Information (OSTI)

    Atomistic surface erosion and thin film growth modelled over realistic time scales Citation Details In-Document Search Title: Atomistic surface erosion and thin film growth...

  11. Enhancing Plant Growth and Stress Tolerance through Use of Fungi...

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

    Enhancing Plant Growth and Stress Tolerance through Use of Fungi and Bacteria that Comprise Plant Microbiomes Enhancing Plant Growth and Stress Tolerance through Use of Fungi and...

  12. Agricultural Productivity Growth in China: Farm Level versus National Measurement

    E-Print Network [OSTI]

    Carter, Colin A.; Chen, Jing; Chu, Baojin

    1999-01-01

    bias any measurement of agricultural productivity, becauseProductivity Growth in China: Farm Level versus National MeasurementProductivity Growth in China: Farm Level versus National Measurement

  13. Growth Mode and Substrate Symmetry Dependent Strain in Epitaxial...

    Office of Scientific and Technical Information (OSTI)

    Growth Mode and Substrate Symmetry Dependent Strain in Epitaxial Graphene. Citation Details In-Document Search Title: Growth Mode and Substrate Symmetry Dependent Strain in...

  14. Growth, structural and optical characterization of L-histidine 4-nitrophenolate (LHPNP) single crystals for NLO applications

    SciTech Connect (OSTI)

    Mahadevan, M., E-mail: devanphysics@gmail.com [Department of Physics, Adhiparasakthi Engineering College, Melmaruvathur - 603319 (India); Ramachandran, K., E-mail: ramach76@yahoo.com [Department of Physics, SRM University - Vadapalani Campus, Chennai -600026 (India); Anandan, P., E-mail: anandantcet@gmail.com [Department of Physics, Thiruvalluvar College of Engineering and Technology, Vandavasi-604 505, India and Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Naka-Ku, Hamamatsu 432-8011 (Japan); Arivanandhan, M., E-mail: arivucz@gmail.com, E-mail: royhaya@ipc.shizuoka.ac.jp; Hayakawa, Y., E-mail: arivucz@gmail.com, E-mail: royhaya@ipc.shizuoka.ac.jp [Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Naka-Ku, Hamamatsu 432-8011 (Japan)

    2014-10-15

    Using slow evaporation solution growth technique, single crystals of L-histidine-4-nitro phenolate has been grown from the solution. Structural analyses were carried out by powder x-ray diffraction, FT-Raman, Fourier Transform Infrared and Nuclear Magnetic Resonance spectral methods to conform the grown crystals. Thermal stability of the grown crystals was studied by thermo-gravimetric (TG) and differential thermal analyses (DTA). UV-Vis spectral analysis has been carried out to find the transparency of the grown crystal. Nonlinear optical property has been confirmed by Kurtz powder technique. The PL measurements were carried out in Perkin Elmer LS 55 Luminescence spectrometer using 410 nm as excitation wavelength. The observed properties have confirmed that the grown crystal is suitable for nonlinear optical applications.

  15. Apparatus for silicon web growth of higher output and improved growth stability

    DOE Patents [OSTI]

    Duncan, Charles S. (Penn Hills, PA); Piotrowski, Paul A. (Monroeville, PA)

    1989-01-01

    This disclosure describes an apparatus to improve the web growth attainable from prior web growth configurations. This apparatus modifies the heat loss at the growth interface in a manner that minimizes thickness variations across the web, especially regions of the web adjacent to the two bounding dendrites. In the unmodified configuration, thinned regions of web, adjacent to the dendrites, were found to be the origin of crystal degradation which ultimately led to termination of the web growth. According to the present invention, thinning adjacent to the dendrites is reduced and the incidence of crystal degradation is similarly reduced.

  16. Shape Smoothing using Double Offsets Frederic Chazal

    E-Print Network [OSTI]

    Thibert, Boris

    . Assuming the solid to be made of a hard material (like steel) one embed it in a bloc of wax. Then one uses a ball of given radius to remove as #12;much wax as possible to obtain the solid on the middle of the fig it with wax and remove (from the inside!) as much wax as possible with a ball. Taking again the complement

  17. Homebuyer Solar Option and Solar Offset Program

    Broader source: Energy.gov [DOE]

    Senate Bill 1 of 2006, which established the statewide California Solar Initiative, also required the California Energy Commission (CEC) to implement regulations that require sellers of production...

  18. Explaining the Price of Voluntary Carbon Offsets

    E-Print Network [OSTI]

    Conte, Marc N.; Kotchen, Matthew

    2009-01-01

    on fuel efficiency, hydropower, fuel substitution, solarbiomass methane, wind, hydropower, solar, and other. 8 OECDtypes of biomass methane, hydropower, so- lar, and wind. All

  19. Discounts, Fungibility and Agricultural GHG Offset projects

    E-Print Network [OSTI]

    McCarl, Bruce A.

    in MMT of Carbon Equivalents Soil Carbon Sequestration Discount for Saturating Sinks No Sink Discounting of Carbon Equivalents Carbon Sequestration from Trees Discount for Saturating Sinks No Sink Discounting 0.S. Agricultural and Forest Carbon Sequestration," 2003. #12;FungibilityFungibility A number of concepts have

  20. Frequency Offset Estimator with Low Computational Complexity

    E-Print Network [OSTI]

    Minn, Hlaing

    decomposition for the derivative of the cost function. The CFO estimate's variance and Cramer-Rao bound (CRB systems [3]­[9], but a relatively new one for MIMO or MIMO OFDM systems [10]­[16]. Numerical calculations operators, respectively. [X]m,n denotes the (m, n)-th entry of a matrix X. [x]m denotes the m-th entry

  1. Sandbag Carbon Offset Map | 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 Inc Jump to:Newberg,EnergyEastCarbon DevelopmentValley CleanRamon,SanchuanSandbag

  2. Financing Residential Energy Efficiency with Carbon Offsets

    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,Energy 9,UNIVERSITYDepartmentPitfalls to

  3. Growth Kinetics and Modeling of Direct Oxynitride Growth with NO-O2 Gas Mixtures

    SciTech Connect (OSTI)

    Everist, Sarah; Nelson, Jerry; Sharangpani, Rahul; Smith, Paul Martin; Tay, Sing-Pin; Thakur, Randhir

    1999-05-03

    We have modeled growth kinetics of oxynitrides grown in NO-O2 gas mixtures from first principles using modified Deal-Grove equations. Retardation of oxygen diffusion through the nitrided dielectric was assumed to be the dominant growth-limiting step. The model was validated against experimentally obtained curves with good agreement. Excellent uniformity, which exceeded expected walues, was observed.

  4. Growth of the NGV Market:Growth of the NGV Market: Lessons LearnedLessons Learned

    E-Print Network [OSTI]

    Growth of the NGV Market:Growth of the NGV Market: Lessons LearnedLessons Learned Roadmap NGVAmerica #12;""Roadmap For Development ofRoadmap For Development of NGV Fueling InfrastructureNGV FuelingData Collection Section · Report defines underlying problem with current data ­ Lack of fuel consumption and NGV

  5. Journal of Crystal Growth 307 (2007) 302308 Equilibrium analysis of zirconium carbide CVD growth

    E-Print Network [OSTI]

    Anderson, Timothy J.

    2007-01-01

    Journal of Crystal Growth 307 (2007) 302­308 Equilibrium analysis of zirconium carbide CVD growth analysis; A3. Metalorganic chemical vapor deposition; A3. Zirconium carbide 1. Introduction Zirconium, is not straightforward particularly by chemical vapor deposition (CVD). Although atmospheric halide CVD using zirconium

  6. Arrowhead Center: Coal Production and Regional Economic Growth Report Title: Coal Production and Regional Economic Growth

    E-Print Network [OSTI]

    Johnson, Eric E.

    Arrowhead Center: Coal Production and Regional Economic Growth Report Title: Coal Production@nmsu.edu #12;Arrowhead Center: Coal Production and Regional Economic Growth i Disclaimer This report States Government or any agency thereof. #12;Arrowhead Center: Coal Production and Regional Economic

  7. Vectorial Growth of Metallic and Semiconducting Single-Wall Carbon

    E-Print Network [OSTI]

    Joselevich, Ernesto

    obstacles toward nanotube-based electronic technology. Vectorial growth of SWNTs is a new approach wherebyVectorial Growth of Metallic and Semiconducting Single-Wall Carbon Nanotubes Ernesto Joselevich growth of single-wall carbon nanotube arrays is presented. The origin of growth is defined by patterning

  8. Role of nucleation in nanodiamond film growth

    SciTech Connect (OSTI)

    Lifshitz, Y.; Lee, C.H.; Wu, Y.; Zhang, W.J.; Bello, I.; Lee, S.T.

    2006-06-12

    Nanodiamond films were deposited using different microwave plasma chemical vapor deposition schemes following several nucleation pretreatment methods. The nucleation efficiency and the films structure were investigated using scanning and transmission electron microscopy and Raman spectroscopy. C{sub 2} dimer growth (CH{sub 4} and H{sub 2} in 90% Ar) cannot nucleate diamond and works only on existing diamond surfaces. The methyl radical process (up to 20% CH{sub 4} in H{sub 2}) allows some nucleation probability on appropriate substrates. Prolonged bias enhanced nucleation initiates both diamond nucleation and growth. C{sub 2} dimer growth results in pure nanodiamond free of amorphous carbon, while prolonged bias enhanced nucleation forms an amorphous carbon/nanodiamond composite.

  9. Efg Crystal Growth Apparatus And Method

    DOE Patents [OSTI]

    Mackintosh, Brian H. (Concord, MA); Ouellette, Marc (Nashua, NH)

    2003-05-13

    An improved mechanical arrangement controls the introduction of silicon particles into an EFG (Edge-defined Film-fed Growth) crucible/die unit for melt replenishment during a crystal growth run. A feeder unit injects silicon particles upwardly through a center hub of the crucible/die unit and the mechanical arrangement intercepts the injected particles and directs them so that they drop into the melt in a selected region of the crucible and at velocity which reduces splashing, whereby to reduce the likelihood of interruption of the growth process due to formation of a solid mass of silicon on the center hub and adjoining components. The invention also comprises use of a Faraday ring to alter the ratio of the electrical currents flowing through primary and secondary induction heating coils that heat the crucible die unit and the mechanical arrangement.

  10. VOLUME 79, NUMBER 11 P H Y S I C A L R E V I E W L E T T E R S 15 SEPTEMBER 1997 Charge State Dependent Energy Loss of Slow Heavy Ions in Solids

    E-Print Network [OSTI]

    Universität, Frankfurt, Germany (Received 5 May 1997) The loss of kinetic energy of slow y 0.3yBohr ions Dependent Energy Loss of Slow Heavy Ions in Solids T. Schenkel,1,2 M. A. Briere,1, * A. V. Barnes,1 A. V from q 31 for oxygen to q 691 for gold ions. For the first time, charge state dependent energy loss

  11. Microstructure and corrosion behavior of die-cast AM60B magnesium alloys in a complex salt solution: A slow positron beam study

    SciTech Connect (OSTI)

    Liu, Y.F. [Wuhan University] [Wuhan University; Qin, Q.L. [Wuhan University] [Wuhan University; Yang, W. [Wuhan University] [Wuhan University; Wen, W. [University of Kentucky] [University of Kentucky; Zhai, T. [University of Kentucky] [University of Kentucky; Yu, B. [University of Alberta] [University of Alberta; Liu, D.Y. [University of Alberta] [University of Alberta; Luo, A. [GM Research and Development Center] [GM Research and Development Center; Song, GuangLing [ORNL] [ORNL

    2014-01-01

    The microstructure and corrosion behavior of high pressure die-cast (HPDC) and super vacuum die-cast (SVDC) AM60B magnesium alloys were investigated in a complex salt solution using slow positron beam technique and potentiodynamic polarization tests. The experiments revealed that a CaCO3 film was formed on the surface of the alloys and that the rate of CaCO3 formation for the SVDC alloy with immersion time was slower than that of the HPDC alloy. The larger volume fraction of b-phase in the skin layer of the SVDC alloy than that of the HPDC alloy was responsible for the better corrosion resistance.

  12. Klebsiella pneumoniae inoculants for enhancing plant growth

    DOE Patents [OSTI]

    Triplett, Eric W. (Middleton, WI); Kaeppler, Shawn M. (Oregon, WI); Chelius, Marisa K. (Greeley, CO)

    2008-07-01

    A biological inoculant for enhancing the growth of plants is disclosed. The inoculant includes the bacterial strains Herbaspirillum seropedicae 2A, Pantoea agglomerans P101, Pantoea agglomerans P102, Klebsiella pneumoniae 342, Klebsiella pneumoniae zmvsy, Herbaspirillum seropedicae Z152, Gluconacetobacter diazotrophicus PA15, with or without a carrier. The inoculant also includes strains of the bacterium Pantoea agglomerans and K. pneumoniae which are able to enhance the growth of cereal grasses. Also disclosed are the novel bacterial strains Herbaspirillum seropedicae 2A, Pantoea agglomerans P101 and P102, and Klebsiella pneumoniae 342 and zmvsy.

  13. Direct growth of graphene on Si(111)

    SciTech Connect (OSTI)

    Thanh Trung, Pham Joucken, Frédéric; Colomer, Jean-François; Robert, Sporken; Campos-Delgado, Jessica; Raskin, Jean-Pierre; Hackens, Benoît; Santos, Cristiane N.

    2014-06-14

    Due to the need of integrated circuit in the current silicon technology, the formation of graphene on Si wafer is highly desirable, but is still a challenge for the scientific community. In this context, we report the direct growth of graphene on Si(111) wafer under appropriate conditions using an electron beam evaporator. The structural quality of the material is investigated in detail by reflection high energy electron diffraction, Auger electron spectroscopy, X-ray photoemission spectroscopy, Raman spectroscopy, high resolution scanning electron microscopy, atomic force microscopy, and scanning tunneling microscopy. Our experimental results confirm that the quality of graphene is strongly dependent on the growth time during carbon atoms deposition.

  14. Growth, strain relaxation properties and high-? dielectric integration of mixed-anion GaAs{sub 1-y}Sb{sub y} metamorphic materials

    SciTech Connect (OSTI)

    Zhu, Y.; Clavel, M.; Goley, P.; Hudait, M. K., E-mail: mantu.hudait@vt.edu [Advanced Devices and Sustainable Energy Laboratory (ADSEL), Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, Virginia 24061 (United States)

    2014-10-07

    Mixed-anion, GaAs{sub 1-y}Sb{sub y} metamorphic materials with a wide range of antimony (Sb) compositions extending from 15% to 62%, were grown by solid source molecular beam epitaxy (MBE) on GaAs substrates. The impact of different growth parameters on the Sb composition in GaAs{sub 1-y}Sb{sub y} materials was systemically investigated. The Sb composition was well-controlled by carefully optimizing the As/Ga ratio, the Sb/Ga ratio, and the substrate temperature during the MBE growth process. High-resolution x-ray diffraction demonstrated a quasi-complete strain relaxation within each composition of GaAs{sub 1-y}Sb{sub y}. Atomic force microscopy exhibited smooth surface morphologies across the wide range of Sb compositions in the GaAs{sub 1-y}Sb{sub y} structures. Selected high-? dielectric materials, Al{sub 2}O{sub 3}, HfO{sub 2}, and Ta{sub 2}O{sub 5} were deposited using atomic layer deposition on the GaAs{sub 0.38}Sb{sub 0.62} material, and their respective band alignment properties were investigated by x-ray photoelectron spectroscopy (XPS). Detailed XPS analysis revealed a valence band offset of >2 eV for all three dielectric materials on GaAs{sub 0.38}Sb{sub 0.62}, indicating the potential of utilizing these dielectrics on GaAs{sub 0.38}Sb{sub 0.62} for p-type metal-oxide-semiconductor (MOS) applications. Moreover, both Al{sub 2}O{sub 3} and HfO{sub 2} showed a conduction band offset of >2 eV on GaAs{sub 0.38}Sb{sub 0.62}, suggesting these two dielectrics can also be used for n-type MOS applications. The well-controlled Sb composition in several GaAs{sub 1-y}Sb{sub y} material systems and the detailed band alignment analysis of multiple high-? dielectric materials on a fixed Sb composition, GaAs{sub 0.38}Sb{sub 0.62}, provides a pathway to utilize GaAs{sub 1-y}Sb{sub y} materials in future microelectronic and optoelectronic applications.

  15. Bioclimatology Water deficits during reproductive growth

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ) constantly maintained at > 50% of soil available water. The treatment drought periods were: 0I) from R1 to R4 greater dry matter production than 0I and 10, and these 2 treatments produced more dry matter than 00Bioclimatology Water deficits during reproductive growth of soybeans. l. Their effects on dry

  16. Spectroscopic studies of metal growth on oxides 

    E-Print Network [OSTI]

    Luo, Kai

    2000-01-01

    of metal clusters on well-defined oxide surfaces. In this work, the nucleation and growth modes of Ag on TiO?(110)(1x1) and (1x2) surfaces, Ag on ultra-thin Al?O? films, and Au on ultra-thin SiO? films were studied by scanning tunneling microscopy (STM...

  17. MESOSCALE AVERAGING OF NUCLEATION AND GROWTH MODELS

    E-Print Network [OSTI]

    Ferguson, Thomas S.

    MESOSCALE AVERAGING OF NUCLEATION AND GROWTH MODELS MARTIN BURGER , VINCENZO CAPASSO , AND LIVIO-Kolmogorov relations for the degree of crystallinity. By relating the computation of expected values to mesoscale averaging, we obtain a suitable description of the process at the mesoscale. We show how the variance

  18. Growth Of Oriented Crystals At Polymerized Membranes

    DOE Patents [OSTI]

    Charych, Deborah H. (Albany, CA), Berman, Amir (Ben-Shiva, IL)

    2000-01-25

    The present invention relates to methods and compositions for the growth and alignment of crystals at biopolymeric films. The methods and compositions of the present invention provide means to generate a variety of dense crystalline ceramic films, with totally aligned crystals, at low temperatures and pressures, suitable for use with polymer and plastic substrates.

  19. Economic Growth and Inequality: Drawing the

    E-Print Network [OSTI]

    von der Heydt, Rüdiger

    and policies in later sessions #12;Economic Growth and Inequality: The Famous Kuznets Curve #12;Income Inequality #12;The New Kuznets Curve #12;Income Inequality #12;From Income Inequality to Health #12;Percent the Channels) #12;Kuznets Curves for Socially Determined Health Outcomes David Bishai, MD,MPH, PhD Professor

  20. Eucalyptus fuelwood growth rate improves with age

    E-Print Network [OSTI]

    Eucalyptus fuelwood growth rate improves with age Dean R. Donaldson 0 Richard B. Standiford I n The two species of Eucalyptus were the fastest growing of the five tree spe- cies evaluated at Grant Street (table 1). Manna gum, Eucalyptus viminalis, al- though about a year younger, is signifi- cantly

  1. Emittance growth from electron beam modulation

    SciTech Connect (OSTI)

    Blaskiewicz, M.

    2009-12-01

    In linac ring colliders like MeRHIC and eRHIC a modulation of the electron bunch can lead to a modulation of the beam beam tune shift and steering errors. These modulations can lead to emittance growth. This note presents simple formulas to estimate these effects which generalize some previous results.

  2. Melt dumping in string stabilized ribbon growth

    DOE Patents [OSTI]

    Sachs, Emanuel M. (42 Old Middlesex Rd., Belmont, MA 02178)

    1986-12-09

    A method and apparatus for stabilizing the edge positions of a ribbon drawn from a melt includes the use of wettable strings drawn in parallel up through the melt surface, the ribbon being grown between the strings. A furnace and various features of the crucible used therein permit continuous automatic growth of flat ribbons without close temperature control or the need for visual inspection.

  3. ECONOMIC GROWTH WHILE PROTECTING THE ENVIRONMENT

    E-Print Network [OSTI]

    Bateman, Ian J.

    -8875 #12;Abstract This paper reviews the historical development of the energy sector in India as background to consideration of how India might develop its energy sector in the future to ensure economic growth and limit. It is estimated that India may account for 21% of the increase in energy-related carbon emissions from developing

  4. JELLYFISH BLOOMS The growth of jellyfishes

    E-Print Network [OSTI]

    Pauly, Daniel

    JELLYFISH BLOOMS The growth of jellyfishes M. L. D. Palomares Æ D. Pauly Published online: 15, Consequences, and Recent Advances M. L. D. Palomares (&) Á D. Pauly The Sea Around Us Project, Fisheries Centre, University of British Columbia, 2202 Main Mall, Vancouver, BC, Canada V6T 1Z4 e-mail: m.palomares

  5. Revisiting BGP Churn Growth Ahmed Elmokashfi

    E-Print Network [OSTI]

    California at San Diego, University of

    Revisiting BGP Churn Growth Ahmed Elmokashfi Simula Research Laboratory ahmed@simula.no Amogh protocol. The focus was on update churn (the number of routing protocol messages that are exchanged when the network undergoes routing changes) and whether churn was grow- ing too fast for routers to handle. Recent

  6. The slow ionized wind and rotating disklike system that are associated with the high-mass young stellar object G345.4938+01.4677

    SciTech Connect (OSTI)

    Guzmán, Andrés E.; Garay, Guido; Bronfman, Leonardo; Mardones, Diego; Rodríguez, Luis F.; Moran, James; Brooks, Kate J.; Nyman, Lars-Åke; Sanhueza, Patricio

    2014-12-01

    We report the detection, made using ALMA, of the 92 GHz continuum and hydrogen recombination lines (HRLs) H40?, H42?, and H50? emission toward the ionized wind associated with the high-mass young stellar object G345.4938+01.4677. This is the luminous central dominating source located in the massive and dense molecular clump associated with IRAS 16562–3959. The HRLs exhibit Voigt profiles, which is a strong signature of Stark broadening. We successfully reproduce the observed continuum and HRLs simultaneously using a simple model of a slow ionized wind in local thermodynamic equilibrium, with no need for a high-velocity component. The Lorentzian line wings imply electron densities of 5 × 10{sup 7} cm{sup –3} on average. In addition, we detect SO and SO{sub 2} emission arising from a compact (?3000 AU) molecular core associated with the central young star. The molecular core exhibits a velocity gradient that is perpendicular to the jet-axis, which we interpret as evidence of rotation. The set of observations toward G345.4938+01.4677 are consistent with it being a young high-mass star associated with a slow photo-ionized wind.

  7. Energy scarcity and economic growth reconsidered

    SciTech Connect (OSTI)

    Uri, N.D. [Economics Research Service, Washington, DC (United States). National Resources and Environment Div.

    1995-05-01

    This analysis is concerned with the effect of energy scarcity on economic growth in the US. After defining the notion of scarcity and introducing two measures of scarcity, namely unit costs and relative energy price, changes in the trend in resource scarcity are investigated for natural gas, bituminous coal, anthracite coal, and crude oil over the most recent three decades. Each of the energy resources became significantly more scarce during the decade of the 1970s in the Malthusian stock scarcity and Malthusian flow scarcity sense. Unit costs exhibit a similar change for natural gas and crude oil but not for bituminous coal and anthracite coal. The situation reversed itself during the 1980s. Natural gas, bituminous coal, anthracite coal, and crude oil all became significantly less scarce during the 1980s than the 1970s. That is, the increase in scarcity as measured by relative energy prices observed during the 1970s was not reversed completely during the 1980s for natural gas and crude oil. Unit costs for natural gas and crude oil demonstrate analogous patterns and test results. Given that change has take place, it has implications for future economic growth to the extent that resource scarcity and economic growth are interrelated. To see whether this is a relevant concern, subsequent to the examination of changing trends in resource scarcity, an objective effort is made to identify a long-run equilibrium relationship between energy scarcity and economic growth. Relying on cointegration techniques, only for crude oil is there a suggestion that resource scarcity has affected economic growth in the US over the period 1889--1992. 56 refs.

  8. Surface growth effects on reactive capillary-driven flow: Lattice Boltzmann investigation

    E-Print Network [OSTI]

    Danilo Sergi; Loris Grossi; Tiziano Leidi; Alberto Ortona

    2014-11-18

    The Washburn law has always played a critical role for ceramics. In the microscale, surface forces take over volume forces and the phenomenon of spontaneous infiltration in narrow interstices becomes of particular relevance. The Lattice Boltzmann method is applied in order to ascertain the role of surface reaction and subsequent deformation of a single capillary in 2D for the linear Washburn behavior. The proposed investigation is motivated by the problem of reactive infiltration of molten silicon into carbon preforms. This is a complex phenomenon arising from the interplay between fluid flow, the transition to wetting, surface growth and heat transfer. Furthermore, it is characterized by slow infiltration velocities in narrow interstices resulting in small Reynolds numbers that are difficult to reproduce with a single capillary. In our simulations, several geometric characteristics for the capillaries are considered, as well as different infiltration and reaction conditions. The main result of our work is that the phenomenon of pore closure can be regarded as independent of the infiltration velocity, and in turn a number of other parameters. The instrumental conclusion drawn from our simulations is that short pores with wide openings and a round-shaped morphology near the throats represent the optimal configuration for the underlying structure of the porous preform in order to achieve faster infiltration. The role of the approximations is discussed in detail and the robustness of our findings is assessed.

  9. Epitaxial growth of silicon for layer transfer

    DOE Patents [OSTI]

    Teplin, Charles; Branz, Howard M

    2015-03-24

    Methods of preparing a thin crystalline silicon film for transfer and devices utilizing a transferred crystalline silicon film are disclosed. The methods include preparing a silicon growth substrate which has an interface defining substance associated with an exterior surface. The methods further include depositing an epitaxial layer of silicon on the silicon growth substrate at the surface and separating the epitaxial layer from the substrate substantially along the plane or other surface defined by the interface defining substance. The epitaxial layer may be utilized as a thin film of crystalline silicon in any type of semiconductor device which requires a crystalline silicon layer. In use, the epitaxial transfer layer may be associated with a secondary substrate.

  10. Transient Growth in Stochastic Burgers Flows

    E-Print Network [OSTI]

    Poças, Diogo

    2015-01-01

    This study considers the problem of the extreme behavior exhibited by solutions to Burgers equation subject to stochastic forcing. More specifically, we are interested in the maximum growth achieved by the "enstrophy" (the Sobolev $H^1$ seminorm of the solution) as a function of the initial enstrophy $\\mathcal{E}_0$, in particular, whether in the stochastic setting this growth is different than in the deterministic case considered by Ayala & Protas (2011). This problem is motivated by questions about the effect of noise on the possible singularity formation in hydrodynamic models. The main quantities of interest in the stochastic problem are the expected value of the enstrophy and the enstrophy of the expected value of the solution. The stochastic Burgers equation is solved numerically with a Monte Carlo sampling approach. By studying solutions obtained for a range of optimal initial data and different noise magnitudes, we reveal different solution behaviors and it is demonstrated that the two quantities ...

  11. Substrate solder barriers for semiconductor epilayer growth

    DOE Patents [OSTI]

    Drummond, Timothy J. (Tijeras, NM); Ginley, David S. (Albuquerque, NM); Zipperian, Thomas E. (Albuquerque, NM)

    1989-01-01

    During the growth of compound semiconductors by epitaxial processes, substrates are typically mounted to a support. In modular beam epitaxy, mounting is done using indium as a solder. This method has two drawbacks: the indium reacts with the substrate, and it is difficult to uniformly wet the back of a large diameter substrate. Both of these problems have been successfully overcome by sputter coating the back of the substrate with a thin layer of tungsten carbide or tungsten carbide and gold. In addition to being compatible with the growth of high quality semiconductor epilayers this coating is also inert in all standard substrate cleaning etchants used for compound semiconductors, and provides uniform distribution of energy in radiant heating.

  12. Pattern formation and nonlocal logistic growth

    E-Print Network [OSTI]

    Nadav M. Shnerb

    2004-03-25

    Logistic growth process with nonlocal interactions is considered in one dimension. Spontaneous breakdown of translational invariance is shown to take place at some parameter region, and the bifurcation regime is identified for short and long range interactions. Domain walls between regions of different order parameter are expressed as soliton solutions of the reduced dynamics for nearest neighbor interactions. The analytic results are confirmed by numerical simulations.

  13. Growth process for gallium nitride porous nanorods

    DOE Patents [OSTI]

    Wildeson, Isaac Harshman; Sands, Timothy David

    2015-03-24

    A GaN nanorod and formation method. Formation includes providing a substrate having a GaN film, depositing SiN.sub.x on the GaN film, etching a growth opening through the SiN.sub.x and into the GaN film, growing a GaN nanorod through the growth opening, the nanorod having a nanopore running substantially through its centerline. Focused ion beam etching can be used. The growing can be done using organometallic vapor phase epitaxy. The nanopore diameter can be controlled using the growth opening diameter or the growing step duration. The GaN nanorods can be removed from the substrate. The SiN.sub.x layer can be removed after the growing step. A SiO.sub.x template can be formed on the GaN film and the GaN can be grown to cover the SiO.sub.x template before depositing SiN.sub.x on the GaN film. The SiO.sub.x template can be removed after growing the nanorods.

  14. Transient Growth in Stochastic Burgers Flows

    E-Print Network [OSTI]

    Diogo Poças; Bartosz Protas

    2015-10-16

    This study considers the problem of the extreme behavior exhibited by solutions to Burgers equation subject to stochastic forcing. More specifically, we are interested in the maximum growth achieved by the "enstrophy" (the Sobolev $H^1$ seminorm of the solution) as a function of the initial enstrophy $\\mathcal{E}_0$, in particular, whether in the stochastic setting this growth is different than in the deterministic case considered by Ayala & Protas (2011). This problem is motivated by questions about the effect of noise on the possible singularity formation in hydrodynamic models. The main quantities of interest in the stochastic problem are the expected value of the enstrophy and the enstrophy of the expected value of the solution. The stochastic Burgers equation is solved numerically with a Monte Carlo sampling approach. By studying solutions obtained for a range of optimal initial data and different noise magnitudes, we reveal different solution behaviors and it is demonstrated that the two quantities always bracket the enstrophy of the deterministic solution. The key finding is that the expected values of the enstrophy exhibit the same power-law dependence on the initial enstrophy $\\mathcal{E}_0$ as reported in the deterministic case. This indicates that the stochastic excitation does not increase the extreme enstrophy growth beyond what is already observed in the deterministic case.

  15. Theoretical priors on modified growth parametrisations

    SciTech Connect (OSTI)

    Song, Yong-Seon; Hollenstein, Lukas; Caldera-Cabral, Gabriela; Koyama, Kazuya E-mail: Lukas.Hollenstein@unige.ch E-mail: Kazuya.Koyama@port.ac.uk

    2010-04-01

    Next generation surveys will observe the large-scale structure of the Universe with unprecedented accuracy. This will enable us to test the relationships between matter over-densities, the curvature perturbation and the Newtonian potential. Any large-distance modification of gravity or exotic nature of dark energy modifies these relationships as compared to those predicted in the standard smooth dark energy model based on General Relativity. In linear theory of structure growth such modifications are often parameterised by virtue of two functions of space and time that enter the relation of the curvature perturbation to, first, the matter over- density, and second, the Newtonian potential. We investigate the predictions for these functions in Brans-Dicke theory, clustering dark energy models and interacting dark energy models. We find that each theory has a distinct path in the parameter space of modified growth. Understanding these theoretical priors on the parameterisations of modified growth is essential to reveal the nature of cosmic acceleration with the help of upcoming observations of structure formation.

  16. ALS Technique Gives Novel View of Lithium Battery Dendrite Growth

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

    ALS Technique Gives Novel View of Lithium Battery Dendrite Growth ALS Technique Gives Novel View of Lithium Battery Dendrite Growth Print Thursday, 24 April 2014 09:46 Lithium-ion...

  17. The Phase of Iron Catalyst Nanoparticles during Carbon Nanotube Growth

    E-Print Network [OSTI]

    Wirth, Christoph T.; Bayer, Bernhard C.; Gamalski, Andrew D.; Esconjauregui, Santiago; Weatherup, Robert S.; Ducati, Caterina; Baehtz, Carsten; Robertson, John; Hofmann, Stephan

    2012-11-28

    growth modes occur upon hydrocarbon exposure: For ?-rich Fe nanoparticle distributions, metallic Fe is the active catalyst phase, implying that carbide formation is not a prerequisite for nanotube growth. For ?-rich catalyst mixtures, Fe3C formation more...

  18. Distributed Wind Market Report: Small Turbines Lead to Big Growth...

    Energy Savers [EERE]

    Distributed Wind Market Report: Small Turbines Lead to Big Growth in Exports Distributed Wind Market Report: Small Turbines Lead to Big Growth in Exports August 18, 2014 - 12:13pm...

  19. Home Performance with ENERGY STAR -- 10 Years of Continued Growth...

    Energy Savers [EERE]

    ENERGY STAR -- 10 Years of Continued Growth Home Performance with ENERGY STAR -- 10 Years of Continued Growth Provides an overview of the HPwES program, HPwES successes, and...

  20. Continuum-scale Modeling of Hydrogen and Helium Bubble Growth...

    Office of Environmental Management (EM)

    Continuum-scale Modeling of Hydrogen and Helium Bubble Growth in Metals Continuum-scale Modeling of Hydrogen and Helium Bubble Growth in Metals Presentation from the 34th Tritium...

  1. Engineering design of a hypobaric plant growth chamber 

    E-Print Network [OSTI]

    Purswell, Joseph Lawrence

    2002-01-01

    This system was developed to measure the effects of low-atmospheric pressure on the growth and function of plants for applications in Advanced Life Support systems research. The system is composed of six independent growth vessels...

  2. A STOCHASTIC MODEL FOR COMPETING GROWTH ON R d

    E-Print Network [OSTI]

    Häggström, Olle

    A STOCHASTIC MODEL FOR COMPETING GROWTH ON R d Maria Deijfen # Olle HË?aggstrË?om + Jonathan Bagley # March 2003 Abstract A stochastic model, describing the growth of two competing infections on R d , is introduced. The growth is driven by outbursts in the infected region, an outburst in the type 1 (2) infected

  3. Coexistence in a two-type continuum growth model

    E-Print Network [OSTI]

    Häggström, Olle

    Coexistence in a two-type continuum growth model Maria Deijfen #3; Olle Haggstrom y April 2004 Abstract We consider a stochastic model, describing the growth of two com- peting infections on R d . The growth takes place by way of spherical outbursts in the infected region, an outburst in the type 1 (2

  4. Internet growth: Myth and reality, use and abuse Andrew Odlyzko

    E-Print Network [OSTI]

    Odlyzko, Andrew M.

    Internet growth: Myth and reality, use and abuse Andrew Odlyzko AT&T Labs - Research amo@research.att.com http://www.research.att.com/ amo Abstract Actual Internet traffic growth rates of 100 percent per year to Internet growth claim astronomical rates of increase; the usual phrase is that "Internet traffic

  5. Climate and Sockeye Salmon Climate effects on growth, phenology, and

    E-Print Network [OSTI]

    Hinch, Scott G.

    Climate and Sockeye Salmon Climate effects on growth, phenology, and survival of sockeye salmon in peer-reviewed studies that link sockeye salmon growth, phenology, and survival to climate variables 2. State the known knowledge in regards to effects of climate variables on growth, phenology, and survival

  6. Growth of Cloud Droplets in a Turbulent Environment

    E-Print Network [OSTI]

    Wang, Lian-Ping

    Growth of Cloud Droplets in a Turbulent Environment Wojciech W. Grabowski1 and Lian-Ping Wang2 1 Keywords condensational growth, turbulent collision-coalescence, particle-laden flow, cloud microphysical concerning the growth of cloud droplets by water-vapor diffu- sion and by collision

  7. Growth of geologic fractures into large-strain populations: review of nomenclature, subcritical crack growth, and some implications

    E-Print Network [OSTI]

    crack growth, and some implications for rock engineering R.A. Schultz* Geomechanics-Rock Fracture Group

  8. Technology Regimes and Productivity Growth in Europe and the United States: A Comparative and Historical Perspective

    E-Print Network [OSTI]

    van Ark, Bart; Smits, Jan Pieter

    2005-01-01

    Productivity Growth, Netherlands, Technology Regime PeriodSteam as a General Purpose Technology: A Growth Accountingeds. , Productivity, Technology, and Economic Growth, Kluwer

  9. IRRADIATION GROWTH IN ZIRCONIUM AT LOW TEMPERATURES BY DIRECT ATHERMAL DEPOSITION OF VACANCIES AT EXTENDED SINKS

    E-Print Network [OSTI]

    Motta, Arthur T.

    IRRADIATION GROWTH IN ZIRCONIUM AT LOW TEMPERATURES BY DIRECT ATHERMAL DEPOSITION OF VACANCIES, which can contribute to the observed growth strains. 1. Introduction Irradiation growth of zirconium

  10. Journal of Crystal Growth 308 (2007) 105109 The effect of growth time on the morphology of ZnO structures

    E-Print Network [OSTI]

    2007-01-01

    Journal of Crystal Growth 308 (2007) 105­109 The effect of growth time on the morphology of ZnO structures deposited on Si (1 0 0) by the aqueous chemical growth technique D. Vernardoua,b,c,Ã, G. Katsarakisa,b,i a Center of Materials Technology and Laser, School of Applied Technology, Technological

  11. Logistic Growth Logistic growth is a simple model for predicting the size y(t) of a population as a

    E-Print Network [OSTI]

    Feldman, Joel

    Logistic Growth Logistic growth is a simple model for predicting the size y(t) of a population the differential equation y (t) = by(t) Logistic growth adds one more wrinkle to this model. It assumes available to each member decreases. This in turn causes the net birth rate b to decrease. In the logistic

  12. Percolation model for growth rates of aggregates and its application for business firm growth Dongfeng Fu,1

    E-Print Network [OSTI]

    Buldyrev, Sergey

    Percolation model for growth rates of aggregates and its application for business firm growth of business firm growth, we develop a dynamic percolation model which captures some of the features of the economical system--i.e., merging and splitting of business firms-- represented as aggregates on a d

  13. Construction Cost Growth for New Department of Energy Nuclear Facilities

    SciTech Connect (OSTI)

    Kubic, Jr., William L.

    2014-05-25

    Cost growth and construction delays are problems that plague many large construction projects including the construction of new Department of Energy (DOE) nuclear facilities. A study was conducted to evaluate cost growth of large DOE construction projects. The purpose of the study was to compile relevant data, consider the possible causes of cost growth, and recommend measures that could be used to avoid extreme cost growth in the future. Both large DOE and non-DOE construction projects were considered in this study. With the exception of Chemical and Metallurgical Research Building Replacement Project (CMRR) and the Mixed Oxide Fuel Fabrication Facility (MFFF), cost growth for DOE Nuclear facilities is comparable to the growth experienced in other mega construction projects. The largest increase in estimated cost was found to occur between early cost estimates and establishing the project baseline during detailed design. Once the project baseline was established, cost growth for DOE nuclear facilities was modest compared to non-DOE mega projects.

  14. Growth histories in bimetric massive gravity

    SciTech Connect (OSTI)

    Berg, Marcus; Buchberger, Igor; Enander, Jonas; Mörtsell, Edvard; Sjörs, Stefan E-mail: igor.buchberger@kau.se E-mail: edvard@fysik.su.se

    2012-12-01

    We perform cosmological perturbation theory in Hassan-Rosen bimetric gravity for general homogeneous and isotropic backgrounds. In the de Sitter approximation, we obtain decoupled sets of massless and massive scalar gravitational fluctuations. Matter perturbations then evolve like in Einstein gravity. We perturb the future de Sitter regime by the ratio of matter to dark energy, producing quasi-de Sitter space. In this more general setting the massive and massless fluctuations mix. We argue that in the quasi-de Sitter regime, the growth of structure in bimetric gravity differs from that of Einstein gravity.

  15. Philippines' downstream sector poised for growth

    SciTech Connect (OSTI)

    Not Available

    1992-05-11

    This paper reports that the Philippines' downstream sector is poised for sharp growth. Despite a slip in refined products demand in recent years, Philippines products demand will rebound sharply by 2000, East-West Center (EWC), Honolulu, predicts. Philippines planned refinery expansions are expected to meet that added demand, EWC Director Fereidun Fesharaki says. Like the rest of the Asia-Pacific region, product specifications are changing, but major refiners in the area expect to meet the changes without major case outlays. At the same time, Fesharaki says, push toward deregulation will further bolster the outlook for the Philippines downstream sector.

  16. Crystal growth under external electric fields

    SciTech Connect (OSTI)

    Uda, Satoshi; Koizumi, Haruhiko; Nozawa, Jun; Fujiwara, Kozo

    2014-10-06

    This is a review article concerning the crystal growth under external electric fields that has been studied in our lab for the past 10 years. An external field is applied electrostatically either through an electrically insulating phase or a direct injection of an electric current to the solid-interface-liquid. The former changes the chemical potential of both solid and liquid and controls the phase relationship while the latter modifies the transport and partitioning of ionic solutes in the oxide melt during crystallization and changes the solute distribution in the crystal.

  17. Career Growth | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouthReport for the t-) S/,,5 'a C | NationalBenefitsDiamondCTBT |Growth

  18. #MarketGrowth | 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 ECoop IncIowa (UtilityMichigan)data bookresult formatswind powering#MarketGrowth Home

  19. A Statistical Physics Perspective on Web Growth

    E-Print Network [OSTI]

    P. L. Krapivsky; S. Redner

    2002-06-07

    Approaches from statistical physics are applied to investigate the structure of network models whose growth rules mimic aspects of the evolution of the world-wide web. We first determine the degree distribution of a growing network in which nodes are introduced one at a time and attach to an earlier node of degree k with rate A_ksim k^gamma. Very different behaviors arise for gamma1. We also analyze the degree distribution of a heterogeneous network, the joint age-degree distribution, the correlation between degrees of neighboring nodes, as well as global network properties. An extension to directed networks is then presented. By tuning model parameters to reasonable values, we obtain distinct power-law forms for the in-degree and out-degree distributions with exponents that are in good agreement with current data for the web. Finally, a general growth process with independent introduction of nodes and links is investigated. This leads to independently growing sub-networks that may coalesce with other sub-networks. General results for both the size distribution of sub-networks and the degree distribution are obtained.

  20. Productivity Growth in the 1990s: Technology, Utilization, or Adjustment? Susanto Basu

    E-Print Network [OSTI]

    Cafarella, Michael J.

    Productivity Growth in the 1990s: Technology, Utilization, or Adjustment? Susanto Basu University (SRB-9617437). #12;ABSTRACT Productivity Growth in the 1990s: Technology, Utilization, or Adjustment in technological change. Cyclical utilization raised measured productivity growth relative to technology growth

  1. Title: Modelling in vitro growth of dense root networks Running head: Modelling Growth of Hairy Roots

    E-Print Network [OSTI]

    Bastian, Peter

    in chemotherapy. To optimize the6 production of valuable secondary metabolites it is necessary to understand7 applications to5 describe e.g. secondary metabolite production.6 keywords: growth model, nutrient uptake, hairy camptothecin (Camptotheca acuminata)3 used in chemotherapy, are secondary metabolites that are not essential

  2. A Quantitative Analysis of Branching, Growth Cone Turning, and Directed Growth in Zebrafish

    E-Print Network [OSTI]

    Goodhill, Geoffrey J.

    in Goodhill and Richards, 1999; McLaughlin and O'Leary, 2005; Feldheim and O'Leary, 2010). Studies these maps (McLaughlin and O'Leary, 2005). In chicks and rodents, serial histology at different developmental their targets (Nakamura and O'Leary, 1989; Simon and O'Leary, 1992; Yates et al., 2001). Pri- mary axon growth

  3. Precision growth index using the clustering of cosmic structures and growth data

    SciTech Connect (OSTI)

    Pouri, Athina; Basilakos, Spyros; Plionis, Manolis E-mail: svasil@academyofathens.gr

    2014-08-01

    We use the clustering properties of Luminous Red Galaxies (LRGs) and the growth rate data provided by the various galaxy surveys in order to constrain the growth index ?) of the linear matter fluctuations. We perform a standard ?{sup 2}-minimization procedure between theoretical expectations and data, followed by a joint likelihood analysis and we find a value of ?=0.56± 0.05, perfectly consistent with the expectations of the ?CDM model, and ?{sub m0} =0.29± 0.01, in very good agreement with the latest Planck results. Our analysis provides significantly more stringent growth index constraints with respect to previous studies, as indicated by the fact that the corresponding uncertainty is only ? 0.09 ?. Finally, allowing ? to vary with redshift in two manners (Taylor expansion around z=0, and Taylor expansion around the scale factor), we find that the combined statistical analysis between our clustering and literature growth data alleviates the degeneracy and obtain more stringent constraints with respect to other recent studies.

  4. Abnormal grain growth in AISI 304L stainless steel

    SciTech Connect (OSTI)

    Shirdel, M.; Mirzadeh, H.; Parsa, M.H.

    2014-11-15

    The microstructural evolution during abnormal grain growth (secondary recrystallization) in 304L stainless steel was studied in a wide range of annealing temperatures and times. At relatively low temperatures, the grain growth mode was identified as normal. However, at homologous temperatures between 0.65 (850 °C) and 0.7 (900 °C), the observed transition in grain growth mode from normal to abnormal, which was also evident from the bimodality in grain size distribution histograms, was detected to be caused by the dissolution/coarsening of carbides. The microstructural features such as dispersed carbides were characterized by optical metallography, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, and microhardness. Continued annealing to a long time led to the completion of secondary recrystallization and the subsequent reappearance of normal growth mode. Another instance of abnormal grain growth was observed at homologous temperatures higher than 0.8, which may be attributed to the grain boundary faceting/defaceting phenomenon. It was also found that when the size of abnormal grains reached a critical value, their size will not change too much and the grain growth behavior becomes practically stagnant. - Highlights: • Abnormal grain growth (secondary recrystallization) in AISI 304L stainless steel • Exaggerated grain growth due to dissolution/coarsening of carbides • The enrichment of carbide particles by titanium • Abnormal grain growth due to grain boundary faceting at very high temperatures • The stagnancy of abnormal grain growth by annealing beyond a critical time.

  5. A systematic review and meta-analysis to revise the Fenton growth chart for preterm infants

    E-Print Network [OSTI]

    Fenton, Tanis R; Kim, Jae H

    2013-01-01

    growth chart with the new World Health Organization (WHO)growth chart, harmonized with the World Health Organization

  6. APS / DPP November 15-19, 2004 Savannah, Georgia Slow formation of high beta plasmas, such as FRCs, is difficult due to the need to build up plasma pressure rapidly enough to balance the

    E-Print Network [OSTI]

    Washington at Seattle, University of

    to charge with negative flux. Fire outer coil at same time as initiate plasma to keep FRC off walls. tf = 0APS / DPP November 15-19, 2004 Savannah, Georgia Slow formation of high beta plasmas, such as FRCs, is difficult due to the need to build up plasma pressure rapidly enough to balance the dominant poloidal field

  7. Study on the mechanism of diametral cladding strain and mixed-oxide fuel element breaching in slow-ramp extended overpower transients

    SciTech Connect (OSTI)

    Tomoyuki Uwaba; Seiichiro Maeda; Tomoyasu Mizuno; Melissa C. Teague

    2012-10-01

    Cladding strain caused by fuel/cladding mechanical interaction (FCMI) was evaluated for mixed-oxide fuel elements subjected to 70–90% slow-ramp extended overpower transient tests in the experimental breeder reactor II. Calculated transient-induced cladding strains were correlated with cumulative damage fractions (CDFs) using cladding strength correlations. In a breached high-smeared density solid fuel element with low strength cladding, cladding thermal creep strain was significantly increased to approximately half the transient-induced cladding strain that was considered to be caused by the tertiary creep when the CDF was close to the breach criterion (=1.0), with the remaining strain due to instantaneous plastic deformation. In low-smeared density annular fuel elements, FCMI load was significantly mitigated and resulted in little cladding strain. The CDFs of the annular fuel elements were lower than 0.01 at the end of the overpower transient, indicating a substantial margin to breach. A substantial margin to breach was also maintained in a high-smeared density fuel element with high strength cladding.

  8. On the Issue of the {zeta} series convergence and loop corrections in the generation of observable primordial non-Gaussianity in slow-roll inflation. II. The trispectrum

    SciTech Connect (OSTI)

    Rodriguez, Yeinzon; Valenzuela-Toledo, Cesar A.

    2010-01-15

    We calculate the trispectrum T{sub {zeta}}of the primordial curvature perturbation {zeta}, generated during a slow-roll inflationary epoch by considering a two-field quadratic model of inflation with canonical kinetic terms. We consider loop contributions as well as tree-level terms, and show that it is possible to attain very high, including observable, values for the level of non-Gaussianity {tau}{sub NL} if T{sub {zeta}}is dominated by the one-loop contribution. Special attention is paid to the claim in J. Cosmol. Astropart. Phys. 02 (2009) 017 that, in the model studied in this paper and for the specific inflationary trajectory we choose, the quantum fluctuations of the fields overwhelm the classical evolution. We argue that such a claim actually does not apply to our model, although more research is needed in order to understand the role of quantum diffusion. We also consider the probability that an observer in an ensemble of realizations of the density field sees a non-Gaussian distribution. In that respect, we show that the probability associated to the chosen inflationary trajectory is non-negligible. Finally, the levels of non-Gaussianity f{sub NL} and {tau}{sub NL} in the bispectrum B{sub {zeta}}and trispectrum T{sub {zeta}}of {zeta}, respectively, are also studied for the case in which {zeta} is not generated during inflation.

  9. Assessing the Significance of Above- and Belowground Carbon Allocation of Fast- and Slow-Growing Families of Loblolly Pine - Final Report

    SciTech Connect (OSTI)

    Topa, M. A.; Weinstein, D. A.; Retzlaff, W. A.

    2001-03-01

    During this project we experimentally evaluated the below-ground biomass and carbon allocation and partitioning of four different fast- and slow-growing families of loblolly pine located in Scotland County, NC, in an effort to increase the long-term performance of the crop. The trees were subjected to optimal nutrition and control since planting in 1993. Destructive harvests in 1998 and 2000 were used for whole?plant biomass estimates and to identify possible family differences in carbon acquisition (photosynthesis) and water use efficiency. At regular intervals throughout each year we sampled tissues for carbohydrate analyses to assess differences in whole-tree carbon storage. Mini rhizotron observation tubes were installed to monitor root system production and turnover. Stable isotope analysis was used to examine possible functional differences in water and nutrient acquisition of root systems between the various families. A genetic dissection of root ontogenic and architectural traits, including biomass partitioning, was conducted using molecular markers to better understand the functional implications of these traits on resource acquisition and whole-plant carbon allocation.

  10. Observation of the Anomalously Slow (Power-Law) Relaxation of the System of Interacting Liquid Nanoclusters in the Disordered Confinement of a Random Porous Medium

    E-Print Network [OSTI]

    V. D. Borman; A. A. Belogorlov; V. N. Tronin

    2015-05-20

    The time evolution of the system of water in the Libersorb 23 (L23) disordered nanoporous medium after the complete filling at excess pressure and the subsequent removal of excess pressure has been studied. It has been found that three stages can be identified in the relaxation of the L23-water system under study. At the first stage, a portion of water at the removal of excess pressure rapidly flows out in the pressure reduction time, i.e., following a decrease in the pressure. It has been shown that, at temperatures below the dispersion transition temperature $T pressure. At the second stage of relaxation, the degree of filling ${\\theta}$ varies slowly according to a power law ${\\theta} \\sim t^{-\\alpha}$ with the exponent ${\\alpha} 10^5$ s, the formed metastable state decays, which is manifested in the transition to a power-law dependence ${\\theta}(t)$ with a larger exponent. The extrusion-time distribution function of pores has been calculated along with the time dependence of the degree of filling, which qualitatively describes the observed anomalously slow relaxation and crossover of the transition to the stage of decay with a power-law dependence ${\\theta}(t)$ with a larger exponent. It has been shown that the relaxation and decay of the metastable state of the confined nonwetting liquid at ${\\theta}>{\\theta_c}$ are attributed to the appearance of local configurations of liquid clusters in confinement and their interaction inside the infinite percolation cluster of filled pores.

  11. Long-term control of root growth

    DOE Patents [OSTI]

    Burton, Frederick G. (West Richland, WA); Cataldo, Dominic A. (Kennewick, WA); Cline, John F. (Prosser, WA); Skiens, W. Eugene (Richland, WA)

    1992-05-26

    A method and system for long-term control of root growth without killing the plants bearing those roots involves incorporating a 2,6-dinitroaniline in a polymer and disposing the polymer in an area in which root control is desired. This results in controlled release of the substituted aniline herbicide over a period of many years. Herbicides of this class have the property of preventing root elongation without translocating into other parts of the plant. The herbicide may be encapsulated in the polymer or mixed with it. The polymer-herbicide mixture may be formed into pellets, sheets, pipe gaskets, pipes for carrying water, or various other forms. The invention may be applied to other protection of buried hazardous wastes, protection of underground pipes, prevention of root intrusion beneath slabs, the dwarfing of trees or shrubs and other applications. The preferred herbicide is 4-difluoromethyl-N,N-dipropyl-2,6-dinitro-aniline, commonly known as trifluralin.

  12. Cadmium zinc sulfide by solution growth

    DOE Patents [OSTI]

    Chen, Wen S. (Seattle, WA)

    1992-05-12

    A process for depositing thin layers of a II-VI compound cadmium zinc sulfide (CdZnS) by an aqueous solution growth technique with quality suitable for high efficiency photovoltaic or other devices which can benefit from the band edge shift resulting from the inclusion of Zn in the sulfide. A first solution comprising CdCl.sub.2 2.5H.sub.2 O, NH.sub.4 Cl, NH.sub.4 OH and ZnCl.sub.2, and a second solution comprising thiourea ((NH.sub.2).sub.2 CS) are combined and placed in a deposition cell, along with a substrate to form a thin i.e. 10 nm film of CdZnS on the substrate. This process can be sequentially repeated with to achieve deposition of independent multiple layers having different Zn concentrations.

  13. Lid for improved dendritic web growth

    DOE Patents [OSTI]

    Duncan, Charles S. (Penn Hills, PA); Kochka, Edgar L. (Greentree, PA); Piotrowski, Paul A. (Monroeville, PA); Seidensticker, Raymond G. (Forest Hills, PA)

    1992-03-24

    A lid for a susceptor in which a crystalline material is melted by induction heating to form a pool or melt of molten material from which a dendritic web of essentially a single crystal of the material is pulled through an elongated slot in the lid and the lid has a pair of generally round openings adjacent the ends of the slot and a groove extends between each opening and the end of the slot. The grooves extend from the outboard surface of the lid to adjacent the inboard surface providing a strip contiguous with the inboard surface of the lid to produce generally uniform radiational heat loss across the width of the dendritic web adjacent the inboard surface of the lid to reduce thermal stresses in the web and facilitate the growth of wider webs at a greater withdrawal rate.

  14. Spinodal instability growth in new stochastic approaches

    E-Print Network [OSTI]

    P. Napolitani; M. Colonna; V. de la Mota

    2014-09-21

    Are spinodal instabilities the leading mechanism in the fragmentation of a fermionic system? Numerous experimental indications suggest such a scenario and stimulated much effort in giving a suitable description, without being finalised in a dedicated transport model. On the one hand, the bulk character of spinodal behaviour requires an accurate treatment of the one-body dynamics, in presence of mechanical instabilities. On the other hand, pure mean-field implementations do not apply to situations where instabilities, bifurcations and chaos are present. The evolution of instabilities should be treated in a large-amplitude framework requiring fluctuations of Langevin type. We present new stochastic approaches constructed by requiring a thorough description of the mean-field response in presence of instabilities. Their particular relevance is an improved description of the spinodal fragmentation mechanism at the threshold, where the instability growth is frustrated by the mean-field resilience.

  15. Cosmological HII Bubble Growth During Reionization

    E-Print Network [OSTI]

    Shin, Min-Su; Cen, Renyue

    2007-01-01

    We present general properties of ionized hydrogen (HII) bubbles and their growth based on a state-of-the-art large-scale (100 Mpc/h) cosmological radiative transfer simulation. The simulation resolves all halos with atomic cooling at the relevant redshifts and simultaneously performs radiative transfer and dynamical evolution of structure formation. Our major conclusions include: (1) for significant HII bubbles, the number distribution is peaked at a volume of ~ 0.6 Mpc^3/h^3 at all redshifts. But, at z 10 even the largest HII bubbles have a balanced ionizing photon contribution from Pop II and Pop III stars, while at z Pop II stars start to dominate the overall ionizing photon production for large bubbles, although Pop III stars continue to make a non-negligible contribution. (6) The relationship between halo number density and bubble size is complicated but a strong correlation is found between halo number density and bubble size for for large bubbles.

  16. Laboratory Evidence for Stochastic Plasma-Wave Growth

    SciTech Connect (OSTI)

    Austin, D. R.; Hole, M. J.; Robinson, P. A.; Cairns, Iver H.; Dallaqua, R.

    2007-11-16

    The first laboratory confirmation of stochastic growth theory is reported. Floating potential fluctuations are measured in a vacuum arc centrifuge using a Langmuir probe. Statistical analysis of the energy density reveals a lognormal distribution over roughly 2 orders of magnitude, with a high-field nonlinear cutoff whose spatial dependence is consistent with the predicted eigenmode profile. These results are consistent with stochastic growth and nonlinear saturation of a spatially extended eigenmode, the first evidence for stochastic growth of an extended structure.

  17. Hopper /scratch file system slow

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

    count has been set back to 2 on Aug 5. The file stripe count of 1 triggered a bug with "cp -p" in a loop calling sytem function ioctl(). The bug has been fixed in new Lustre...

  18. Component Overpressure Growth and Characterization of High Resistivity...

    Office of Scientific and Technical Information (OSTI)

    States Language: English Subject: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BRIDGMAN METHOD; CHARGE TRANSPORT; CRYSTAL GROWTH; RADIATION DETECTORS Word...

  19. Low-temperature plasma-deposited silicon epitaxial films: Growth...

    Office of Scientific and Technical Information (OSTI)

    Low-temperature plasma-deposited silicon epitaxial films: Growth and properties Citation Details In-Document Search Title: Low-temperature plasma-deposited silicon epitaxial films:...

  20. Indonesia-Strengthening Planning Capacity for Low Carbon Growth...

    Open Energy Info (EERE)

    in Developing Asia Jump to: navigation, search Name Indonesia-Strengthening Planning Capacity for Low Carbon Growth in Developing Asia AgencyCompany Organization Asian...

  1. Philippines-Strengthening Planning Capacity for Low Carbon Growth...

    Open Energy Info (EERE)

    in Developing Asia Jump to: navigation, search Name Philippines-Strengthening Planning Capacity for Low Carbon Growth in Developing Asia AgencyCompany Organization Asian...

  2. Strengthening Planning Capacity for Low Carbon Growth in Developing...

    Open Energy Info (EERE)

    Asia - Thailand Jump to: navigation, search Name Thailand-Strengthening Planning Capacity for Low Carbon Growth in Developing Asia AgencyCompany Organization Asian...

  3. Fatigue crack growth behavior of Ti-1100 at elevated temperature

    SciTech Connect (OSTI)

    Maxwell, D.C.; Nicholas, T.

    1995-12-31

    Effects of temperature, frequency, and cycles with superimposed hold times are evaluated in Ti-1100 in order to study the complex creep-fatigue-environment interactions in this material. Crack growth rate tests conducted at cyclic loading frequency of 1.0 Hz show that raising the temperature from 593 to 650 C has only a slightly detrimental effect on crack growth rate, although these temperatures produce growth rates significantly higher than at room temperature. From constant {Delta}K tests, the effects of temperature at constant frequency show a minimum crack growth rate at 250 C. From the minimum crack growth rate at 250 C, the crack growth rate increases linearly with temperature. Increases in frequency at constant temperatures of 593 and 650 C produce a continuous decrease in growth rate in going from 0.001 to 1.0 Hz, although the behavior is primarily cycle dependent in this region. Tests at 1.0 Hz with superimposed hold times from 1 to 1,000 s are used to evaluate creep-fatigue-environment interactions. Hold times at maximum load are found to initially decrease and then increase the cyclic crack growth rate with increasing duration. This is attributed to crack-tip blunting during short hold times and environmental degradation at long hold times. Hold times at minimum load show no change in growth rates, indicating that there is no net environmental degradation to the bulk material beyond that experienced during the baseline 1 Hz cycling.

  4. Communication Growth in Minimally Verbal Children with Autism

    E-Print Network [OSTI]

    Mucchetti, Charlotte A.

    2013-01-01

    Adaptive intervention for communication in minimally verbalK. & Kasari, C. (2013). Communication growth in minimallysubstitutes different communication (e.g. first says “want”,

  5. Thermodynamic and kinetic control of the lateral Si wire growth

    SciTech Connect (OSTI)

    Dedyulin, Sergey N. Goncharova, Lyudmila V.

    2014-03-24

    Reproducible lateral Si wire growth has been realized on the Si (100) surface. In this paper, we present experimental evidence showing the unique role that carbon plays in initiating lateral growth of Si wires on a Si (100) substrate. Once initiated in the presence of ?5 ML of C, lateral growth can be achieved in the range of temperatures, T?=?450–650?°C, and further controlled by the interplay of the flux of incoming Si atoms with the size and areal density of Au droplets. Critical thermodynamic and kinetic aspects of the growth are discussed in detail.

  6. Amplified Demand for Solar Trackers to Boost Market Growth in...

    Open Energy Info (EERE)

    Amplified Demand for Solar Trackers to Boost Market Growth in Middle East and Africa Home > Groups > Solar Permitting Roadmap Development Wayne31jan's picture Submitted by...

  7. Centrality Fingerprints for Power Grid Network Growth Models

    E-Print Network [OSTI]

    Gurfinkel, Aleks Jacob; Rikvold, Per Arne

    2015-01-01

    In our previous work, we have shown that many of the properties of the Florida power grid are reproduced by deterministic network growth models based on the minimization of energy dissipation $E_\\mathrm{diss}$. As there is no $a~ priori$ best $E_\\mathrm{diss}$ minimizing growth model, we here present a tool, called the "centrality fingerprint," for probing the behavior of different growth models. The centrality fingerprints are comparisons of the current flow into/out of the network with the values of various centrality measures calculated at every step of the growth process. Finally, we discuss applications to the Maryland power grid.

  8. CVD Growth of Carbon Nanotubes Directly on Nickel Substrate

    E-Print Network [OSTI]

    Du, Chunsheng; Pan, Ning

    2005-01-01

    growth, carbon nanotubes, nickel substrates 1. Introductionto directly grow carbon nanotubes on nickel substrate underof the carbon nanotubes The nickel substrates were directly

  9. Low Carbon Green Growth: Integrated Policy Approach to Climate...

    Open Energy Info (EERE)

    Low Carbon Green Growth: Integrated Policy Approach to Climate Change for Asia-Pacific Developing Countries Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Low Carbon...

  10. Atomistic mechanisms for bilayer growth of graphene on metal...

    Office of Scientific and Technical Information (OSTI)

    Atomistic mechanisms for bilayer growth of graphene on metal substrates This content will become publicly available on January 8, 2016 Prev Next Title: Atomistic mechanisms...

  11. Before the Subcommittee on Economic Growth, Job Creation and...

    Energy Savers [EERE]

    Job Creation and Regulatory Affairs - House Committee on Oversight and Governmant Reform Before the Subcommittee on Economic Growth, Job Creation and Regulatory Affairs -...

  12. On Better Understanding Dilute Void Growth in Ductile Metals

    E-Print Network [OSTI]

    Kostka, Tim

    2010-01-01

    and growth of damage in a dual-phase steel observed by X-rayWeck et al. , 2007], dual-phase steel [Maire et al. , 2008],

  13. Discovery of slow X-ray pulsations in the high-mass X-ray binary 4U 2206+54

    E-Print Network [OSTI]

    P. Reig; J. M Torrejon; I. Negueruela; P. Blay; M. Ribo; J. Wilms

    2008-12-12

    The source 4U 2206+54 is one of the most enigmatic high-mass X-ray binaries. In spite of intensive searches, X-ray pulsations have not been detected in the time range 0.001-1000 s. A cyclotron line at ~30 keV has been suggested by various authors but never detected with significance. The stellar wind of the optical companion is abnormally slow. The orbital period, initially reported to be 9.6 days, disappeared and a new periodicity of 19.25 days emerged. Our new long and uninterrupted RXTE observations allow us to search for long (~1 hr) pulsations for the first time. We have discovered 5560-s pulsations in the light curve of 4U 2206+54. Initially detected in RXTE data, these pulsations are also present in INTEGRAL and EXOSAT observations. The average X-ray luminosity in the energy range 2-10 keV is 1.5 x 10^{35} erg s^{-1} with a ratio Fmax/Fmin ~ 5. This ratio implies an eccentricity of ~0.4, somewhat higher than previously suggested. The source also shows a soft excess at low energies. If the soft excess is modelled with a blackbody component, then the size and temperature of the emitting region agrees with its interpretation in terms of a hot spot on the neutron star surface. The source displays variability on time scales of days, presumably due to changes in the mass accretion rate as the neutron star moves around the optical companion in a moderately eccentric orbit.

  14. Modelling and Analysis of Phase Variation in Bacterial Colony Growth

    E-Print Network [OSTI]

    Gilbert, David

    Modelling and Analysis of Phase Variation in Bacterial Colony Growth Ovidiu P^arvu1 , David Gilbert, Brandenburg University of Technology monika.heiner@informatik.tu-cottbus.de 3 Harbin Institute of Technology case study, namely phase variation patterning in bacterial colony growth, forming circular colonies

  15. From"Green Growth"to sound policies: An overview*

    E-Print Network [OSTI]

    Growth" to sound policies: An overview Richard Schmalensee ,1 Massachusetts Institute of TechnologyFrom"Green Growth"to sound policies: An overview* Richard Schmalensee *Reprinted from Energy Change Postal Address: Massachusetts Institute of Technology 77 Massachusetts Avenue, E19-411 Cambridge

  16. Dynamic Limit Growth Indices in Discrete Time Tomasz R. Bielecki

    E-Print Network [OSTI]

    Heller, Barbara

    Dynamic Limit Growth Indices in Discrete Time Tomasz R. Bielecki 1 bielecki@iit.edu Igor Cialenco 1, Illinois Institute of Technology, Chicago, 60616 IL, USA 2 Institute of Mathematics, Jagiellonian propose a new class of mappings, called Dynamic Limit Growth Indices, that are designed to measure

  17. A Framework for Analysis of the Uncertainty of Socioeconomic Growth

    E-Print Network [OSTI]

    A Framework for Analysis of the Uncertainty of Socioeconomic Growth and Climate Change on the Risk of Technology 77 Massachusetts Avenue, E19-411 Cambridge, MA 02139 (USA) Location: Building E19, Room 411 400 Growth and Climate Change on the Risk of Water Stress: a Case Study in Asia Charles Fant* , C. Adam

  18. Organic molecular beam deposition: Growth studies beyond the first monolayer

    E-Print Network [OSTI]

    Schreiber, Frank

    epitaxial relations, surface and inter- face energies, growth modes, correlation functions, dynamic scaling), subject of the present contribution, it is generally agreed that the structural definition is important impact on the functional properties, understanding the structure formation, i.e., the growth process

  19. Switching and Growth for Microbial Populations in Catastrophic Responsive Environments

    E-Print Network [OSTI]

    Visco, Paolo - Laboratoire Matière et Systèmes Complexes, Université Paris 7

    Switching and Growth for Microbial Populations in Catastrophic Responsive Environments Paolo Visco), Universite´ Paris-Sud, Orsay, France ABSTRACT Phase variation, or stochastic switching between alternative environments. We use a theoretical model to assess whether such switching is a good strategy for growth

  20. A Computerized Tree Growth Projection System for Forest Resource Evaluation

    E-Print Network [OSTI]

    A Computerized Tree Growth Projection System for Forest Resource Evaluation in the Lake States Allen L. Lundgren Burton L. Essex Abstract: A computerized tree growth projection sys- tem has been developed for the Lake States Region as part of a larger Forest Resources Evaluation Program (FREP