National Library of Energy BETA

Sample records for moderate population growth

  1. Population Growth February 6, 2008

    E-Print Network [OSTI]

    Mead, Jodi L.

    for all values of M and k. 3. Generate the direction fields of the logistic equation with harvesting: dy that the population of a species of fish in a certain lake is growing according to a logistic model with k = 0.3 and M intial value problem. (b) Plot the direction field and a few informative solution curves. (c) Describe

  2. Stochastic resonance in a generalized Von Foerster population growth model

    SciTech Connect (OSTI)

    Lumi, N.; Mankin, R.

    2014-11-12

    The stochastic dynamics of a population growth model, similar to the Von Foerster model for human population, is studied. The influence of fluctuating environment on the carrying capacity is modeled as a multiplicative dichotomous noise. It is established that an interplay between nonlinearity and environmental fluctuations can cause single unidirectional discontinuous transitions of the mean population size versus the noise amplitude, i.e., an increase of noise amplitude can induce a jump from a state with a moderate number of individuals to that with a very large number, while by decreasing the noise amplitude an opposite transition cannot be effected. An analytical expression of the mean escape time for such transitions is found. Particularly, it is shown that the mean transition time exhibits a strong minimum at intermediate values of noise correlation time, i.e., the phenomenon of stochastic resonance occurs. Applications of the results in ecology are also discussed.

  3. 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

  4. 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

  5. Population growth, distribution, and size in Latin America

    E-Print Network [OSTI]

    Lopez-Carr, David

    timber harvesting oil exploration/extraction population growth? degradation of lands in source areas history in Amazonia · Early extractive uses Rubber Forestry #12;Development history in Amazonia forests in the world 2) 45% of all the fresh water on the Earth 3) the planet's largest carbon sink 4

  6. 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.

  7. STA4000 Final Report -Detailed Analysis Investigation on Iceland Population Growth and Climate

    E-Print Network [OSTI]

    Rosenthal, Jeffrey S.

    STA4000 Final Report - Detailed Analysis Investigation on Iceland Population Growth and Climate of Iceland Population Growth and Climate Change. 2 Data Source 2.1 Population of Iceland Iceland settler to Iceland is around 9th century. Iceland has a relative stable and simple population structure

  8. STA4000 Final Report -Summary Investigation on Iceland Population Growth and Climate

    E-Print Network [OSTI]

    Rosenthal, Jeffrey S.

    STA4000 Final Report - Summary Investigation on Iceland Population Growth and Climate Change CHEN is to investigate the relationship between the Iceland population growth and the climate change before the industrialization. The reason we choose Iceland is it has a relative stable and simple population structure (Most

  9. 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

  10. Risk analysis for species introductions: forecasting population growth of Eurasian ruffe

    E-Print Network [OSTI]

    Risk analysis for species introductions: forecasting population growth of Eurasian ruffe productivity (Leung et al. 2002). Risk-analysis methodology for intentional and unintentional introductions

  11. Risk Analysis for Water Resources Under Climate Change, Population Growth, and Land Use Change

    E-Print Network [OSTI]

    Kiparsky, Michael

    2010-01-01

    Vulnerability from climate change acid population growth."2004). "Emissions pathways, climate change, and impacts onthe Intergovernmental Panel on Climate Change (IPCC). J. J.

  12. FITNESS AND DENSITY-DEPENDENT POPULATION GROWTH IN DROSOPHILA MELANOGASTER

    E-Print Network [OSTI]

    Mueller, Laurence D.

    viability (DOBZHANSKY,SPASSKYand TIDWELL1963), fecundity (MARINKOVIC1967), virility (BRITTNACHER1979), developmental rate (MARINKOVIC1967) and sperm displacement (PRQUTand BUNDGAARD1977). Population ecologists have

  13. 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

  14. Revised October 9, 2006 Poverty and Economic Growth: The Impact of Population Dynamics and

    E-Print Network [OSTI]

    Chen, Tsuhan

    Revised October 9, 2006 Poverty and Economic Growth: The Impact of Population Dynamics Distribution and Poverty: A Micro Survey of Interrelationships Ali A. Ali, Arab Planning Institute Kuwait 09:50 ­ 10:10 hrs Demographic Transitions: Poverty and Growth Experiences of Selected Countries in Africa

  15. FORAGE FISH POPULATIONS AND GROWTH OF MUSKELLUNGE IN A SOUTH DAKOTA POWER PLANT COOLING RESERVOIR

    E-Print Network [OSTI]

    FORAGE FISH POPULATIONS AND GROWTH OF MUSKELLUNGE IN A SOUTH DAKOTA POWER PLANT COOLING RESERVOIR POWER PLANT COOLING RESERVOIR This thesis is approved as a creditable and independent investigation estimates of the 4 major forage fishes in Big Stone Power Plant cooling reservoir, South Dakota, 1 July Page

  16. Association with pathogenic bacteria affects life-history traits and population growth in Caenorhabditis elegans.

    E-Print Network [OSTI]

    Diaz, S. Anaid; Mooring, Eric Q.; Rens, Elisabeth G.; Restif, Olivier

    2015-03-23

    with respect to its association with pathogenic bacteria. In order to start filling the gap between the two areas, we conducted a series of experiments aiming at measuring life-history traits as well as population growth of C. elegans in response to three...

  17. Contributions of vital rates to growth of a protected population of American black bears

    E-Print Network [OSTI]

    Mitchell, Mike

    Contributions of vital rates to growth of a protected population of American black bears Michael S have evaluated such contributions of vital rates to l for American black bears (Ursus americanus). We sensitivity and elasticity analyses to examine the actual and potential contributions of variation of vital

  18. 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

  19. World population growth, industrialization, energy demand, and environmental goals are presently driving rapid global change in emissions with complex conse-

    E-Print Network [OSTI]

    Mauzerall, Denise

    395 World population growth, industrialization, energy demand, and environmental goalsPollution Intercontinental transport of pollution between Asia, North America, and Europe takes place via the prevailing with lifetimes longer than a month are best addressed from that perspective. Mercury has long been recognized

  20. A SIMPLE METHOD FOR ESTIMATING THE FOOD CONSUMPTION OF FISH POPULATIONS FROM GROWTH DATA AND

    E-Print Network [OSTI]

    CONVERSION EXPERIMENTS} DANIEL PAULy2 ABSTRACf Experimental data on the gross food conversion efficiency model can be used to compute the food consumption per unit biomass of an age-structured fish population difficult to obtain is the average food conswnption per unit biomass (Q1B) of each group. The present study

  1. Age, Growth, and Population Dynamics of Common Bottlenose Dolphins (Tursiops truncatus) Along Coastal Texas 

    E-Print Network [OSTI]

    Neuenhoff, Rachel Dawn

    2010-10-12

    , AND POPULATION DYNAMICS OF COMMON BOTTLENOSE DOLPHINS (Tursiops truncatus) ALONG COASTAL TEXAS A Thesis by RACHEL DAWN NEUENHOFF Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... by RACHEL DAWN NEUENHOFF Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved by: Chair of Committee, Christopher D. Marshall Committee...

  2. The influence of prey consumption and demographic stochasticity on population growth rate of Isle Royale wolves Canis lupus

    E-Print Network [OSTI]

    efficiency is important because it links population ecology and energy flux through ecosystems (Odum 1969. For the isolated wolf population on Isle Royale, annual variation in kill rate explains 22% of the variation efficiency (ratio of production to respiration) of wolves is between 0.5% and 1.5%. More generally, we assess

  3. Investigations into the effects of environmental and physical variables on the growth of natural and transplanted populations of Ruppia maritima L. s.l. in the Galveston Bay System, Texas 

    E-Print Network [OSTI]

    Schubert, William James

    2002-01-01

    System, Texas. Growth differences in natural populations among different basin morphologies and tidal regimes were examined. Sediment texture influenced the percent cover of widgeon grass the greatest of the variables studied. High silt content and low...

  4. Accessible buildings Moderately accessible buildings*

    E-Print Network [OSTI]

    Lee, Dongwon

    Campus neighborhood map Moderately accessible paths** Accessible building entrance via parking lot to the University Park campus. This map, provided by UAC, is designed to assist persons with disabilities in finding accessibility. Your observations and suggestions regarding architectural For more information on UAC, you can

  5. 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 ...

  6. Simulated population responses of common carp to commercial exploitation

    SciTech Connect (OSTI)

    Weber, Michael J.; Hennen, Matthew J.; Brown, Michael L.

    2011-12-01

    Common carp Cyprinus carpio is a widespread invasive species that can become highly abundant and impose deleterious ecosystem effects. Thus, aquatic resource managers are interested in controlling common carp populations. Control of invasive common carp populations is difficult, due in part to the inherent uncertainty of how populations respond to exploitation. To understand how common carp populations respond to exploitation, we evaluated common carp population dynamics (recruitment, growth, and mortality) in three natural lakes in eastern South Dakota. Common carp exhibited similar population dynamics across these three systems that were characterized by consistent recruitment (ages 3 to 15 years present), fast growth (K = 0.37 to 0.59), and low mortality (A = 1 to 7%). We then modeled the effects of commercial exploitation on size structure, abundance, and egg production to determine its utility as a management tool to control populations. All three populations responded similarly to exploitation simulations with a 575-mm length restriction, representing commercial gear selectivity. Simulated common carp size structure modestly declined (9 to 37%) in all simulations. Abundance of common carp declined dramatically (28 to 56%) at low levels of exploitation (0 to 20%) but exploitation >40% had little additive effect and populations were only reduced by 49 to 79% despite high exploitation (>90%). Maximum lifetime egg production was reduced from 77 to 89% at a moderate level of exploitation (40%), indicating the potential for recruitment overfishing. Exploitation further reduced common carp size structure, abundance, and egg production when simulations were not size selective. Our results provide insights to how common carp populations may respond to exploitation. Although commercial exploitation may be able to partially control populations, an integrated removal approach that removes all sizes of common carp has a greater chance of controlling population abundance and reducing perturbations induced by this invasive species.

  7. Microbial Activity, Growth, and Mortality in Environmental Assemblages: Population and Community Response to Rewetting of a Dry Mediterranean Soil and Anaerobic Methane Cycling in Tropical and Boreal Soils

    E-Print Network [OSTI]

    Blazewicz, Steven Joseph

    2012-01-01

    community information and ecosystem characteristics.population information with ecosystem characteristics.inform about ecosystem functions and this information would

  8. Low to moderate temperature nanolaminate heater

    DOE Patents [OSTI]

    Eckels, J. Del (Livermore, CA); Nunes, Peter J. (Danville, CA); Simpson, Randall L. (Livermore, CA); Hau-Riege, Stefan (Fremont, CA); Walton, Chris (Oakland, CA); Carter, J. Chance (Livermore, CA); Reynolds, John G. (San Ramon, CA)

    2011-01-11

    A low to moderate temperature heat source comprising a high temperature energy source modified to output low to moderate temperatures wherein the high temperature energy source modified to output low to moderate temperatures is positioned between two thin pieces to form a close contact sheath. In one embodiment the high temperature energy source modified to output low to moderate temperatures is a nanolaminate multilayer foil of reactive materials that produces a heating level of less than 200.degree. C.

  9. LOGISTIC POPULATION MODEL In the logistic population model ...

    E-Print Network [OSTI]

    2015-08-26

    In the logistic population model, the population growth rate obeys. dP dt. = r(1 ?. P c. )P, P(0) = P0. To solve this equation, we proceed as follow. dP dt. = r(1 ?. P.

  10. 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 ] (

  11. 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

  12. Life history, longevity and aging Population ecology

    E-Print Network [OSTI]

    Wilkinson, Gerald S.

    = intrinsic rate of population growth dN/dt = (b-d)N = rN "r-selected" #12;Logistic population growth Addition of a density dependent term results in logistic growth K = carrying capacity dN/dt = rN (K-N)/K "K to allocation of resources between maintenance and reproduction #12;Reproductive value · Age

  13. Energy demand and population changes

    SciTech Connect (OSTI)

    Allen, E.L.; Edmonds, J.A.

    1980-12-01

    Since World War II, US energy demand has grown more rapidly than population, so that per capita consumption of energy was about 60% higher in 1978 than in 1947. Population growth and the expansion of per capita real incomes have led to a greater use of energy. The aging of the US population is expected to increase per capita energy consumption, despite the increase in the proportion of persons over 65, who consume less energy than employed persons. The sharp decline in the population under 18 has led to an expansion in the relative proportion of population in the prime-labor-force age groups. Employed persons are heavy users of energy. The growth of the work force and GNP is largely attributable to the growing participation of females. Another important consequence of female employment is the growth in ownership of personal automobiles. A third factor pushing up labor-force growth is the steady influx of illegal aliens.

  14. Climate and food supply influences on mobile epibenthic megafauna populations in the abyssal NE Pacific from 1989 to 2004

    E-Print Network [OSTI]

    Ruhl, Henry A.

    2006-01-01

    effects: population growth, critical density, and the chance of extinction. Natural Resourceeffects: population growth, critical density, and the chance of extinction. Natural Resource

  15. Microclimate moderates plant responses to macroclimate warming

    E-Print Network [OSTI]

    Vellend, Mark

    Microclimate moderates plant responses to macroclimate warming Pieter De Frennea,b,1 , Francisco of Land Use Systems, Leibniz-ZALF, DE-15374 Müncheberg, Germany; u Beechwood House, St. Briavels Common, Stanford, CA, and approved September 24, 2013 (received for review June 13, 2013) Recent global warming

  16. Cryogenic neutron moderator on mesitylene pellets for IBR-2 reactor

    E-Print Network [OSTI]

    Titov, Anatoly

    and manufacturing of monitoring system of fulfillment of cold moderator (III quarter of 2011 . ) DevelopmentCryogenic neutron moderator on mesitylene pellets for IBR-2 reactor Anan'ev V., Belyakov A, 4.Stationary reflector, 5.Cold moderators, 6.Emergency system, 7.Water moderators, 8.Control rods

  17. Psoriasis patients with a history of malignancy represent an important but overlooked study population

    E-Print Network [OSTI]

    Persad, Paul; Levender, Michelle M; Feldman, Steven R

    2011-01-01

    Commentary: Psoriasis patients with a history of malignancytreatment of moderate to severe psoriasis often requires thethis patient population. Psoriasis is rarely perceived as a

  18. MICROBIAL POPULATIONS FECAL PELLETS AND

    E-Print Network [OSTI]

    Luther, Douglas S.

    MICROBIAL POPULATIONS FECAL PELLETS AND AND BIOLU}IINESCENCEOF OCEANIC SEDII,IENTTRAP PARTICLES activities of microbial populations associated with fecal pellets col-Lecteo from oceanic zooplankton were (indicators of microbial growth and reproduction rates, respectively) were monitored in fecal pellets at time

  19. Moderate pressure hydrocracking: A profitable conversion alternative

    SciTech Connect (OSTI)

    Hunter, M.G. (M.W. Kellogg Co., Houston, TX (United States)); Pappal, D.A. (Mobil Research and Development Corp., Dallas, TX (United States)); Pesek, C.L. (Akzo Chemicals, Inc., Houston, TX (United States))

    1994-01-01

    Moderate Pressure Hydrocracking (MPHC) is a once-through hydrocracking process for the conversion of heavy gas oils to low-sulfur distillates and unconverted oil which is highly upgraded relative to the raw feed. Operating at lower pressure significantly reduces capital investment and results in substantially less hydrogen consumption. Furthermore, the process requirements for MPHC are within the range of many existing vacuum gas oil desulfurization units. Mobil Research and Development Corporation and Akzo Chemicals have been actively engaged in Moderate Pressure Hydrocracking research for more than ten years. Mobil's first commercial MPHC installation was successfully started up in 1983. Mobil operates five hydrocrackers, two of which are partial conversion MPHC designs that process heavy vacuum gas oils into middle distillate products. This research and operating experience has led to an advanced capability to apply hydrocracking conversion technology to heavy feedstocks under moderate pressure conditions. Akzo has commercialized a family of hydrotreating and hydrocracking catalysts which are combined to achieve the optimal balance between activity and selectivity for each specific refining application. The M.W. Kellogg Co. is a leading technology based international Engineering Construction company and has experience in the design, engineering and construction of 22 hydrocrackers. Mobil, Akzo and Kellogg have formed a partnership to offer MAK-MPHC and other full conversion hydrocracking technologies for license to the refining industry. This paper will present pilot plant and commercial results for Akzo catalysts in Moderate Pressure Hydrocracking applications. Specific process design features, typical refinery applications and the economic incentives for selecting MAK-MPHC will also be discussed.

  20. 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...

  1. Optimally moderated nuclear fission reactor and fuel source therefor

    DOE Patents [OSTI]

    Ougouag, Abderrafi M. (Idaho Falls, ID); Terry, William K. (Shelley, ID); Gougar, Hans D. (Idaho Falls, ID)

    2008-07-22

    An improved nuclear fission reactor of the continuous fueling type involves determining an asymptotic equilibrium state for the nuclear fission reactor and providing the reactor with a moderator-to-fuel ratio that is optimally moderated for the asymptotic equilibrium state of the nuclear fission reactor; the fuel-to-moderator ratio allowing the nuclear fission reactor to be substantially continuously operated in an optimally moderated state.

  2. Notes and Discussion Vole Population Dynamics: Influence of Weather Extremes on Stoppage of

    E-Print Network [OSTI]

    Oli, Madan K.

    Notes and Discussion Vole Population Dynamics: Influence of Weather Extremes on Stoppage of Population Growth ABSTRACT.--Effects of 74 episodes of extreme weather on stoppage of population growth of extreme weather may have stopped population growth of only six M. ochrogaster fluctuations and of two M

  3. Biomineralization of carbonate and phosphate by moderately halophilic bacteria

    E-Print Network [OSTI]

    Gilli, Adrian

    Biomineralization of carbonate and phosphate by moderately halophilic bacteria M ´onica S-calcite; coprecipitated; moderately halophilic bacteria. Abstract We investigated the precipitation of carbonate and phosphate minerals by 19 species of moderately halophilic bacteria using media with variable Mg21 /Ca21

  4. Fischer-Tropsch synthesis process employing a moderated ruthenium catalyst

    DOE Patents [OSTI]

    Abrevaya, H.

    1990-07-31

    A Fischer-Tropsch type process produces hydrocarbons from carbon monoxide and hydrogen using a novel catalyst comprising moderated ruthenium on an inorganic oxide support. The preferred moderator is silicon. Preferably the moderator is effectively positioned in relationship to ruthenium particles through simultaneous placement on the support using reverse micelle impregnation. 1 fig.

  5. Graduation Celebration Bruce Bare, Dean and Moderator

    E-Print Network [OSTI]

    Brown, Sally

    Jingliang Mao Developing a Continuous Bisulfite Postsulfonation Process for the Black Liquor from Soda Traffic Induced Sediment Production Processes from Forest Road Particle Size Distributions Daniela J to Forest Ecosystem Processes in the Western United States: Fire Area Burned and Douglas-fir Growth

  6. Loan Programs for Low- and Moderate-Income Households | Department...

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

    Multifamily and Low-Income Housing Peer Exchange Call Series: Loan Programs for Low- and Moderate-Income Households, March 13, 2014. Call Slides and Discussion Summary More...

  7. The Denver Energy Challenge-- Serving Moderate Income Residents

    Broader source: Energy.gov [DOE]

    Provides an overview of the Denver Energy Challenge and how services were expanded to moderate income residents including challenges and next steps.

  8. Adherence to Adalimumab in Patients with Moderate to Severe Psoriasis

    E-Print Network [OSTI]

    2013-01-01

    with Moderate to Severe Psoriasis Cameron West 1 , MD;and relapsing course of psoriasis is often associated withenrolled patients with psoriasis. J Dermatolog Treatment.

  9. Viscous Undular Hydraulic Jumps of Moderate Reynolds number

    E-Print Network [OSTI]

    Shyamasundar, R.K.

    Viscous Undular Hydraulic Jumps of Moderate Reynolds number Ratul Dasgupta I will present some results on undular hydraulic jumps occurring in a two bores (in rivers), where the interface remains horizontal, the moderate Reynolds hydraulic jump shows a linear increase in height due to viscosity

  10. DESIGN PHILOSOPHY FOR STEEL STRUCTURES IN MODERATE SEISMIC REGIONS

    E-Print Network [OSTI]

    Hines, Eric

    DESIGN PHILOSOPHY FOR STEEL STRUCTURES IN MODERATE SEISMIC REGIONS E.M. Hines1 and L.A. Fahnestock2 ABSTRACT The authors propose a design philosophy for steel buildings in moderate seismic regions that draws of the International Building Code has introduced seismic design to regions of North America that heretofore have

  11. Assessment of Moderate- and High-Temperature Geothermal Resources...

    Open Energy Info (EERE)

    Assessment of Moderate- and High-Temperature Geothermal Resources of the United States Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Assessment of...

  12. Evolution of gluon TMD at low and moderate x

    E-Print Network [OSTI]

    I. Balitsky; A. Tarasov

    2014-11-05

    We study how the rapidity evolution of gluon transverse momentum dependent distribution changes from nonlinear evolution at small $x\\ll 1$ to linear double-logarithmic evolution at moderate $x\\sim 1$.

  13. Rapidity evolution of gluon TMD from low to moderate x

    E-Print Network [OSTI]

    I. Balitsky; A. Tarasov

    2015-09-29

    We study how the rapidity evolution of gluon transverse momentum dependent distribution changes from nonlinear evolution at small $x \\ll 1$ to linear evolution at moderate $x \\sim 1$.

  14. Rapidity evolution of gluon TMD from low to moderate x

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

    Balitsky, Ian; Tarasov, A.

    2015-10-05

    In this article, we study how the rapidity evolution of gluon transverse momentum dependent distribution changes from nonlinear evolution at small $x \\ll 1$ to linear evolution at moderate $x \\sim 1$.

  15. Enhancing Neutron Beam Production with a Convoluted Moderator

    SciTech Connect (OSTI)

    Iverson, Erik B; Baxter, David V; Muhrer, Guenter; Ansell, Stuart; Gallmeier, Franz X; Dalgliesh, Robert; Lu, Wei; Kaiser, Helmut

    2014-10-01

    We describe a new concept for a neutron moderating assembly resulting in the more efficient production of slow neutron beams. The Convoluted Moderator, a heterogeneous stack of interleaved moderating material and nearly transparent single-crystal spacers, is a directionally-enhanced neutron beam source, improving beam effectiveness over an angular range comparable to the range accepted by neutron beam lines and guides. We have demonstrated gains of 50% in slow neutron intensity for a given fast neutron production rate while simultaneously reducing the wavelength-dependent emission time dispersion by 25%, both coming from a geometric effect in which the neutron beam lines view a large surface area of moderating material in a relatively small volume. Additionally, we have confirmed a Bragg-enhancement effect arising from coherent scattering within the single-crystal spacers. We have not observed hypothesized refractive effects leading to additional gains at long wavelength. In addition to confirmation of the validity of the Convoluted Moderator concept, our measurements provide a series of benchmark experiments suitable for developing simulation and analysis techniques for practical optimization and eventual implementation at slow neutron source facilities.

  16. 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

  17. Targeted Marketing and Program Design for Low- and Moderate-Income...

    Energy Savers [EERE]

    Targeted Marketing and Program Design for Low- and Moderate-Income Households Targeted Marketing and Program Design for Low- and Moderate-Income Households Better Buildings...

  18. Clinical Studies MLH1 Founder Mutations with Moderate Penetrance in

    E-Print Network [OSTI]

    Rosenberg, Noah

    Clinical Studies MLH1 Founder Mutations with Moderate Penetrance in Spanish Lynch Syndrome Families>A and c.1865T>A (p.Leu622His) of the DNA repair gene MLH1 occur frequently in Spanish Lynch syndrome estimated for other path- ogenic Spanish MLH1 mutations. A common haplotype was associated with each

  19. Family Moderate Income Homeowners In New York State

    Broader source: Energy.gov [DOE]

    "Family Moderate Income Homeowners In New York State: Enhancing Resource Accessibility Through Process Improvement and Targeted Outreach," by Residential Energy Efficiency Solutions, July 10, 2012, Arlington, Virginia. Provides an overview of broadening accessibility to financing through process improvement and targeted outreach.

  20. Age-dating the Tully-Fisher relation at moderate redshift

    E-Print Network [OSTI]

    Ferreras, Ignacio; Ziegler, Bodo; Silk, Joseph

    2013-01-01

    We analyse the Tully-Fisher relation at moderate redshift from the point of view of the underlying stellar populations, by comparing optical and NIR photometry with a phenomenological model that combines population synthesis with a simple prescription for chemical enrichment. The sample comprises 108 late-type galaxies extracted from the FORS Deep Field (FDF) and William Herschel Deep Field (WHDF) surveys at z<1 (median redshift z=0.45). A strong correlation is found between stellar mass and the parameters that describe the star formation history, with massive galaxies forming their populations early (zFOR~3), with star formation timescales, tau1~4 Gyr; although with very efficient chemical enrichment timescales (tau2~1 Gyr). In contrast, the stellar-to-dynamical mass ratio which, in principle, would track the efficiency of feedback in the baryonic processes driving galaxy formation - does not correlate strongly with the model parameters. On the Tully-Fisher plane, no significant age segregation is found a...

  1. Standard practice for evaluation of surveillance capsules from light-water moderated nuclear power reactor vessels

    E-Print Network [OSTI]

    American Society for Testing and Materials. Philadelphia

    2010-01-01

    Standard practice for evaluation of surveillance capsules from light-water moderated nuclear power reactor vessels

  2. Population Analysis, Fall 2005 1 Population Analyses

    E-Print Network [OSTI]

    Clark, William R.

    Population Analysis, Fall 2005 1 Population Analyses EEOB/AEcl 611 Fall Semester 2005 Scheduled's, including MARK, SAS, DISTANCE, and others. We'll often use the "recitation session" to get you started Cooch and Gary White #12;Population Analysis, Fall 2005 2 2001) that can also be downloaded from Evan

  3. Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations

    E-Print Network [OSTI]

    Klanjš?ek, Tin

    2006-01-01

    Energy intake of individuals affects growth of organisms and, therefore, populations. Persistent lipophilic toxicants acquired with the energy can bioaccumulate and harm individuals. Marine mammals are particularly vulnerable ...

  4. Egypt's population policies and family planning program: a critical examination 

    E-Print Network [OSTI]

    Carr, Aline B.

    1996-01-01

    Egypt's national family planning program, in existence since 1965, has been fairly successful in increasing the use of family planning methods and lowering the population growth rate in Egypt. However, the fact that as few as 10 percent of women...

  5. State zoning legislation and local adaptation : an evaluation on the implementation of Massachusetts Chapter 40R Smart Growth Legislation

    E-Print Network [OSTI]

    Wang, Yuqi, M.C.P. Massachusetts Institute of Technology

    2014-01-01

    The Smart Growth Zoning Overlay District Act (M.G.L. Chapter 40R, the Legislation) was issued in March 2005 with the mission to substantially increase the supply of housing, especially for low- and moderate-income households, ...

  6. Moderate-pressure hydrocracking of heavy vacuum gas oils

    SciTech Connect (OSTI)

    Derr, W.R. Jr.; Tracy, W.J.

    1986-03-01

    Market trends toward increased middle distillate have prompted renewed interest in hydrocracking. Moderate pressure hydrocracking (MPHC) is once-through, single stage hydrocracking process which enables partial conversion of 345 C + vacuum gas oils to low sulfur distillates. Advantages over conventional hydrocracking include lower hydrogen partial pressure and, consequently, much lower hydrogen consumption. Lower pressure is also desirable from the point of view of equipment availability since the process may be operated in low pressure equipment not normally used for hydrocracking. An example of commercial application of a MPHC retrofit of a vacuum gas oil desulfurization unit is given. Catalysts and economics are described for the process. 4 references.

  7. Elastic moderation of intrinsically applied tension in lipid membranes

    E-Print Network [OSTI]

    Michael A. Lomholt; Bastien Loubet; John H. Ipsen

    2010-10-20

    Tension in lipid membranes is often controlled externally, by pulling on the boundary of the membrane or changing osmotic pressure across a curved membrane. But modifications of the tension can also be induced in an internal fashion, for instance as a byproduct of changing a membranes electric potential or, as observed experimentally, by activity of membrane proteins. Here we develop a theory which demonstrate how such internal contributions to the tension are moderated through elastic stretching of the membrane when the membrane is initially in a low tension floppy state.

  8. Effect Size and Moderators of Effects for Token Economy Interventions 

    E-Print Network [OSTI]

    Soares, Denise

    2012-02-14

    of this investigation was to Meta-analyze the single case research on TE implemented in school and is the first to offer effect size analysis and identify moderators. The use of TE?s has been widely established as an evidence-based intervention for use in prisons... to implement a TE is needed in our literature. Empirical evidence for the use of a token economy in a classroom is presented along with suggested implementation ideas. Twenty four studies were included in this Meta-analysis with an overall combined Tau...

  9. The use of reduced-moderation light water reactors for transuranic isotope burning in thorium fuel

    E-Print Network [OSTI]

    Lindley, Benjamin A.

    2015-02-03

    -moderation LWRs can improve TRU transmutation performance, but the VC is still severely limiting for these designs. Reduced-moderation pressurized water reactors (RMPWRs) and boiling water reactors (RBWRs) are considered in this study. Using thorium (Th) instead...

  10. Somatic growth functions are critical parameters for understanding the life

    E-Print Network [OSTI]

    Florida, University of

    181300 Corpus Christi, Texas 78480 Wendy G. Teas Wayne N. Witzell Southeast Fisheries Science Center growth rates was tested in a population of green turtles, Chelonia mydas, in the south- ern Bahamas

  11. Is Florida's Growth Management Act protecting agricultural lands?

    E-Print Network [OSTI]

    Lloyd, Stephen (Stephen Charles Rhys)

    2011-01-01

    Florida has experienced more population growth over the past half century than any other state, which has led to some of the most extensive urban development on valuable agricultural lands. To address this and other impacts ...

  12. Global investments for sustainable growth in the wireless telecommunication industry

    E-Print Network [OSTI]

    Matsuda, Osamu, M.B.A. Massachusetts Institute of Technology

    2006-01-01

    Since its establishment in 1992, NTT DoCoMo had accomplished rapid growth by developing innovative strategies and meeting consumer demands. However, the population-based penetration rate of Japanese wireless phones now ...

  13. Extreme natural hazards: population growth, globalization and environmental change

    E-Print Network [OSTI]

    Huppert, Herbert

    in the affected countries, brought home to the world the realities of the danger. We live in times of increasing also be affecting the frequency of extreme weather events as well as the vulnerability of coastal areas

  14. Optimizing moderator dimensions for neutron scattering at the spallation neutron source

    SciTech Connect (OSTI)

    Zhao, J. K.; Robertson, J. L.; Herwig, Kenneth W.; Gallmeier, Franz X.; Riemer, Bernard W. [Instrument and Source Division, Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)] [Instrument and Source Division, Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

    2013-12-15

    In this work, we investigate the effect of neutron moderator dimensions on the performance of neutron scattering instruments at the Spallation Neutron Source (SNS). In a recent study of the planned second target station at the SNS facility, we have found that the dimensions of a moderator play a significant role in determining its surface brightness. A smaller moderator may be significantly brighter over a smaller viewing area. One of the immediate implications of this finding is that for modern neutron scattering instrument designs, moderator dimensions and brightness have to be incorporated as an integrated optimization parameter. Here, we establish a strategy of matching neutron scattering instruments with moderators using analytical and Monte Carlo techniques. In order to simplify our treatment, we group the instruments into two broad categories: those with natural collimation and those that use neutron guide systems. For instruments using natural collimation, the optimal moderator selection depends on the size of the moderator, the sample, and the moderator brightness. The desired beam divergence only plays a role in determining the distance between sample and moderator. For instruments using neutron optical systems, the smallest moderator available that is larger than the entrance dimension of the closest optical element will perform the best (assuming, as is the case here that smaller moderators are brighter)

  15. Clustering of moderate luminosity X-ray-selected type 1 and type 2 AGNs at z ? 3

    SciTech Connect (OSTI)

    Allevato, V.; Finoguenov, A. [Department of Physics, University of Helsinki, Gustaf Hällströmin katu 2a, FI-00014 Helsinki (Finland); Civano, F. [Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory, Hanover, NH 03755 (United States); Cappelluti, N. [University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250 (United States); Shankar, F. [Department of Physics and Astronomy, University of Southampton, Highfield SO17 1BJ (United Kingdom); Miyaji, T. [Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Ensenada (Mexico); Hasinger, G. [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Gilli, R.; Zamorani, G.; Comastri, A. [INAF-Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna (Italy); Lanzuisi, G. [National Observatory of Athens I. Metaxa and Vas. Pavlou St. GR-15236 Penteli (Greece); Salvato, M. [Max-Planck-Institute für Extraterrestrische Physik, Giessenbachstrasse 1, D-85748 Garching (Germany); Elvis, M. [Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Silverman, J. [Institute for the Physics and Mathematics of the Universe, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwashi, Chiba 277-8583 (Japan)

    2014-11-20

    We investigate, for the first time at z ? 3, the clustering properties of 189 Type 1 and 157 Type 2 X-ray active galactic nuclei (AGNs) of moderate luminosity ((L {sub bol}) = 10{sup 45.3} erg s{sup –1}), with photometric or spectroscopic redshifts in the range 2.2 < z < 6.8. These samples are based on Chandra and XMM-Newton data in COSMOS. We find that Type 1 and Type 2 COSMOS AGNs at z ? 3 inhabit DMHs with typical mass of log M{sub h} = 12.84{sub ?0.11}{sup +0.10} and 11.73{sub ?0.45}{sup +0.39} h {sup –1} M {sub ?}, respectively. This result requires a drop in the halo masses of Type 1 and 2 COSMOS AGNs at z ? 3 compared to z ? 2 XMM-COSMOS AGNs with similar luminosities. Additionally, we infer that unobscured COSMOS AGNs at z ? 3 reside in 10 times more massive halos compared to obscured COSMOS AGNs, at the 2.6? level. This result extends to z ? 3 the results found in COSMOS at z ? 2, and rules out the picture in which obscuration is purely an orientation effect. A model which assumes that the AGNs activity is triggered by major mergers is quite successful in predicting both the low halo mass of COSMOS AGNs and the typical mass of luminous SDSS quasars at z ? 3, with the latter inhabiting more massive halos respect to moderate luminosity AGNs. Alternatively we can argue, at least for Type 1 COSMOS AGNs, that they are possibly representative of an early phase of fast (i.e., Eddington limited) BH growth induced by cosmic cold flows or disk instabilities. Given the moderate luminosity, these new fast growing BHs have masses of ?10{sup 7-8} M {sub ?} at z ? 3 which might evolve into ?10{sup 8.5-9} M {sub ?} mass BHs at z = 0. Following our clustering measurements, we argue that this fast BH growth at z ? 3 in AGNs with moderate luminosity occurs in DMHs with typical mass of ? 6× 10{sup 12} h {sup –1} M {sub ?}.

  16. Real-Time Observation of Atomic Layer Deposition Inhibition: Metal Oxide Growth on Self-Assembled Alkanethiols

    E-Print Network [OSTI]

    Real-Time Observation of Atomic Layer Deposition Inhibition: Metal Oxide Growth on Self each atomic layer deposition (ALD) cycle to an analytical island-growth model that enables moderately optimized conditions. KEYWORDS: atomic layer deposition, self-assembled monolayers, quartz crystal

  17. Climate warming will reduce growth and survival of Scots pine except in the far north

    E-Print Network [OSTI]

    Thomas, David D.

    LETTER Climate warming will reduce growth and survival of Scots pine except in the far north P. B in North America. Growth and survival were analysed in response to climatic transfer distance populations at each site, and across sites for regional groups of populations, were related to climate

  18. Moderator: Doug Brown, VP CIPS Alberta 04/12/2012 Computer Science Industry Day 2012

    E-Print Network [OSTI]

    Habib, Ayman

    Moderator: Doug Brown, VP CIPS Alberta 04/12/2012 Computer Science Industry, CIO, Alberta Electric System Operator (AESO) Marlo Nielsen, Sr. Recruiting

  19. Optimizing moderation of He-3 neutron detectors for shielded fission sources

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

    Rees, Lawrence B.; Czirr, J. Bart

    2012-07-10

    Abstract: The response of 3-He neutron detectors is highly dependent on the amount of moderator incorporated into the detector system. If there is too little moderation, neutrons will not react with the 3-He. If there is too much moderation, neutrons will not reach the 3-He. In applications for portal or border monitors where 3He detectors are used to interdict illicit Importation of plutonium, the fission source is always shielded to some extent. Since the energy distribution of neutrons emitted from the source depends on the amount and type of shielding present, the optimum placement of moderating material around 3-He tubesmore »is a function of shielding. In this paper, we use Monte Carlo techniques to model the response of 3-He tubes placed in polyethylene boxes for moderation. To model the shielded fission neutron source, we use a 252-Cf source placed in the center of spheres of water of varying radius. Detector efficiency as a function of box geometry and shielding are explored. We find that increasing the amount of moderator behind and to the sides of the detector generally improves the detector response, but that benefits are limited if the thickness of the polyethylene moderator is greater than about 5-7 cm. The thickness of the moderator in front of the 3He tubes, however, is very important. For bare sources, about 5-6 cm of moderator is optimum, but as the shielding increases, the optimum thickness of this moderator decreases to 0-1 cm. A two-tube box with a moderator thickness of 5 cm in front of the first tube and a thickness of 1 cm in front of the second tube is proposed to improve the detector's sensitivity to lower-energy neutrons.« less

  20. Optimizing moderation of He-3 neutron detectors for shielded fission sources

    SciTech Connect (OSTI)

    Rees, Lawrence B. [Brigham Young University, Provo, UT (United States); Czirr, J. Bart [Brigham Young University, Provo, UT (United States)

    2012-11-01

    Abstract: The response of 3-He neutron detectors is highly dependent on the amount of moderator incorporated into the detector system. If there is too little moderation, neutrons will not react with the 3-He. If there is too much moderation, neutrons will not reach the 3-He. In applications for portal or border monitors where 3He detectors are used to interdict illicit Importation of plutonium, the fission source is always shielded to some extent. Since the energy distribution of neutrons emitted from the source depends on the amount and type of shielding present, the optimum placement of moderating material around 3-He tubes is a function of shielding. In this paper, we use Monte Carlo techniques to model the response of 3-He tubes placed in polyethylene boxes for moderation. To model the shielded fission neutron source, we use a 252-Cf source placed in the center of spheres of water of varying radius. Detector efficiency as a function of box geometry and shielding are explored. We find that increasing the amount of moderator behind and to the sides of the detector generally improves the detector response, but that benefits are limited if the thickness of the polyethylene moderator is greater than about 5-7 cm. The thickness of the moderator in front of the 3He tubes, however, is very important. For bare sources, about 5-6 cm of moderator is optimum, but as the shielding increases, the optimum thickness of this moderator decreases to 0-1 cm. A two-tube box with a moderator thickness of 5 cm in front of the first tube and a thickness of 1 cm in front of the second tube is proposed to improve the detector's sensitivity to lower-energy neutrons.

  1. Logistic (Self-Regulated) Growth (Ricklefs & Miller 1999) Begon, Harper, Townsend, 2000

    E-Print Network [OSTI]

    Caraco, Thomas

    Logistic (Self-Regulated) Growth (Ricklefs & Miller 1999) Let ( ) 0 0 N NK b - = #12;#12;Begon, Approximately, in Nature #12;Logistic Population Growth Simple Assumption: Instantaneous Feedback dN(t)/dt = F Newborn Individual's Impact on Per-Capitum Growth Alternative Assumption: Time Delay, Lagged Logistic d

  2. Logistic Growth: Quadratic, No Time Delay, K Constant b = [K -N(0)]/N(0)

    E-Print Network [OSTI]

    Caraco, Thomas

    Logistic Growth: Quadratic, No Time Delay, K Constant #12;b = [K - N(0)]/N(0) Logistic Population-Cummings Protozoan, small metazoan & large mammal: Logistic growth (app.), Increasing time to max dN/dt #12;Gause, sociology, technology How might logistic growth's assumptions fail biologically? #12;Density

  3. Evaluation of Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and Moderate Resolution Imaging Spectrometer

    E-Print Network [OSTI]

    Evaluation of Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and Moderate Resolution the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and the Moderate Resolution Imaging Spectrometer (MODIS). Key goals were to assess the nature of these relationships as they varied between sensors

  4. Asymptotic Analysis of the Structure of Moderately Rich Methane-Air Flames

    E-Print Network [OSTI]

    Pitsch, Heinz

    Asymptotic Analysis of the Structure of Moderately Rich Methane-Air Flames K. SESHADRI,* X. S. BAI Republic of Germany The asymptotic structure of laminar, moderately rich, premixed methane flames structure of laminar, stoichi- ometric, and lean methane flames [1­6]. For rich flames, these analyses did

  5. Policy on Moderation of Assessment In May 2013, the Senate approved, for implementation

    E-Print Network [OSTI]

    Greenaway, Alan

    Policy on Moderation of Assessment In May 2013, the Senate approved, for implementation with effect from 2013/14, a Policy on the Moderation of Assessment. The aim is: To assure the University policies covers: All qualifying assessments contributing to the degree awards associated with a programme

  6. Parallel grid population

    DOE Patents [OSTI]

    Wald, Ingo; Ize, Santiago

    2015-07-28

    Parallel population of a grid with a plurality of objects using a plurality of processors. One example embodiment is a method for parallel population of a grid with a plurality of objects using a plurality of processors. The method includes a first act of dividing a grid into n distinct grid portions, where n is the number of processors available for populating the grid. The method also includes acts of dividing a plurality of objects into n distinct sets of objects, assigning a distinct set of objects to each processor such that each processor determines by which distinct grid portion(s) each object in its distinct set of objects is at least partially bounded, and assigning a distinct grid portion to each processor such that each processor populates its distinct grid portion with any objects that were previously determined to be at least partially bounded by its distinct grid portion.

  7. 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

  8. Stellar populations in the Phoenix dwarf galaxy

    E-Print Network [OSTI]

    Enrico V. Held; Ivo Saviane; Yazan Momany

    1999-03-01

    We have obtained deep BVI CCD photometry of Phoenix, a galaxy considered a transition case between dwarf spheroidal and dwarf irregular galaxies. A comparison of our data with the RGBs of Galactic globular clusters gives a mean metal abundance [Fe/H] = -1.81+/-0.10 dex. The presence of an intrinsic color dispersion in the upper red RGB suggests an abundance range of about 0.5 dex, although a range in age may also affect the RGB width. For the first time, a HB has been revealed at V~23.8. The HB is predominantly red yet moderately extended to the blue, which indicates the presence of a significant population with age comparable to that of old halo GGCs. This HB morphology in a metal-poor system indicates a mild "second parameter" effect. From the mean level of the HB we derived a true distance modulus 23.21+/-0.08, in good agreement with the distance modulus 23.04+/-0.07 estimated from the cutoff of the RGB at I~23.1. We find a radial gradient in the HB morphology, and our CMDs show a small number of stars above the RGB tip, that most likely are AGB stars of an intermediate age population. Their number indicates that the fraction of intermediate age population in Phoenix is approximately 30-40%. A young stellar population is definitely present in Phoenix, consistent with a star formation episode started at least 0.6 Gyr ago, up to 1x10^{8} yr ago. Both young stars and AGB stars are centrally concentrated, which indicates that recent star formation preferentially occurred in the inner galaxy regions. In many respects, Phoenix appears not dissimilar from dwarf spheroidal galaxies in the Local Group.

  9. Optimizing Moderator Dimensions for Neutron Scattering at the Spallation Neutron Source

    SciTech Connect (OSTI)

    Zhao, Jinkui [ORNL; Robertson, Lee [ORNL; Herwig, Kenneth W [ORNL; Gallmeier, Franz X [ORNL; Riemer, Bernie [ORNL

    2013-01-01

    In this work, we investigate the effect of neutron moderator dimensions on the performance of neutron scattering instruments at the Spallation Neutron Source. In a recent study of the planned second target station at the Spallation Neutron Source (SNS) facility [1,2], we have found that the dimensions of a moderator play a significant role in determining its surface brightness. A smaller moderator may be significantly brighter for a smaller viewing area [4]. One of the immediate implications of this finding is that for modern neutron scattering instrument designs, moderator dimensions and brightness have to be incorporated as an integrated optimization parameter. Here, we establish a strategy of matching neutron scattering instruments with moderators using analytical and Monte Carlo techniques. In order to simplify our treatment, we group the instruments into two broad categories, those with natural collimation and those that use neutron guide systems. We found that the cross-sections of the sample and the neutron guide, respectively, are the deciding factors for choosing the moderator. Beam divergence plays no role as long as it is within the reach of practical constraints. Namely, the required divergence is not too large for the guide or sample to be located close enough to the moderator on an actual spallation source.

  10. CAUSAL ANALYSIS OF THE UNCONTROLLED MODERATOR IN THE HFEF MAIN CELL

    SciTech Connect (OSTI)

    Charles R. Posegate; Bryan P. Crofts

    2012-12-01

    On 11/07/2012 while investigating the cause of defects in neutron radiography film at HFEF, oil was discovered near the elevator shaft located at the 4M location within the Main Cell. Subsequent investigation identified oil (untracked moderator) in several locations ofthe HFEF Main Cell. Initial analysis determined that oil leaking from a 1M shielding window had leaked past a compensatory containment system resulting in a thin layer of oil found in several locations on the main cell floor. The result of this condition is uncontrolled moderator in moderator controlled zones, which is a violation of Criticality Hazard Control Statements (CHCS) for HFEF.

  11. Water Stress Inhibits Hydraulic Conductance and Leaf Growth in Rice Seedlings but Not the

    E-Print Network [OSTI]

    Neumann, Peter M.

    Water Stress Inhibits Hydraulic Conductance and Leaf Growth in Rice Seedlings but Not the Transport of Water via Mercury-Sensitive Water Channels in the Root1 Zhongjin Lu and Peter M. Neumann* Plant of Technology, Haifa 32000, Israel The mechanisms by which moderate water stress (adding poly- ethylene glycol

  12. Principles of Population Health Science Population Health 795

    E-Print Network [OSTI]

    Sheridan, Jennifer

    1 Principles of Population Health Science Population Health 795 A course in the Program in Population Health Fall 2012 University of Wisconsin-Madison, School of Medicine and Public Health The lecture in medicine and public health, inequities in health persist. Understanding health on a population level

  13. Multiple Sources, Admixture, and Genetic Variation in Introduced Anolis Lizard Populations

    E-Print Network [OSTI]

    Glor, Rich

    during introduc- tion. Reduction in genetic variation in introduced species may limit population growth limitar el crecimiento pobla- cional, incrementar el riesgo de extinci´on y limitar la adaptaci´on, lo que

  14. Biomechanical ordering of dense cell populations Dmitri Volfson*

    E-Print Network [OSTI]

    Hasty, Jeff

    Biomechanical ordering of dense cell populations Dmitri Volfson*§ , Scott Cookson* , Jeff Hasty. The biomechanical inter- actions arising from the growth and division of individual cells in confined environments of high-density bacterial colonies is spatial organization caused by the ``contact biomechanics'' arising

  15. Population, Consumption & the Environment

    E-Print Network [OSTI]

    Columbia University

    consumes the 77 trillion barrels of oil energy equivalent per year ­ Fossil fuel consumption (oil, coal12/11/2009 1 Population, Consumption & the Environment Alex de Sherbinin Center for International of carbon in 2001 · The ecological footprint, a composite measure of consumption measured in hectares

  16. 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...

  17. Measurement of cryogenic moderator temperature effects in a small heterogeneous thermal reactor

    SciTech Connect (OSTI)

    Hoovler, G.S.; Ball, R.M.; Lewis, R.H.

    1994-12-31

    Past papers have described a critical experiment (CX) built at Sandia National Laboratories to investigate the neutronic behavior of the particle-bed reactor (PBK). Among the experiments previously reported were tests to measure the reactivity effect of uniform temperature variations between 20 and 80{degree}C. This paper describes additional experiments designed to examine the effects of cryogenic moderator temperatures on core reactivity and neutron spectrum. The general importance of temperature effects to the design of the PBR have been previously discussed. A unique feature of the PBR is that the moderator may be at cryogenic temperatures during reactor startup. Because temperature effects in small, heterogeneous thermal reactors can be significant and because we found no integral measurements with cryogenic moderators in such systems, an experiment with a cryogenic moderator was designed and performed in the CX as an extension to the isothermal measurements previously reported.

  18. Zoning and occupancy-moderation for residential space-conditioning under demand-driven electricity pricing

    E-Print Network [OSTI]

    Leow, Woei Ling, 1977-

    2012-01-01

    Occupancy-moderated zonal space-conditioning (OZS) refers to the partitioning of a residence into different zones and independently operating the space-conditioning equipment of each zone based on its occupancy. OZS remains ...

  19. Effect of Enzyme Supplementation at Moderate Cellulase Loadings on Initial Glucose and Xylose

    E-Print Network [OSTI]

    California at Riverside, University of

    ARTICLE Effect of Enzyme Supplementation at Moderate Cellulase Loadings on Initial Glucose-glucosidase supplementation. Furthermore, for the first time, xylobiose and higher xyloo- ligomers were shown to inhibit

  20. Moderators of the Safety Climate-Injury Relationship: A Meta-Analytic Examination 

    E-Print Network [OSTI]

    Beus, Jeremy M.

    2010-07-14

    and group levels of analysis. Hypotheses were posited regarding the effects of six moderators: study design (i.e., retrospective or prospective), the time frame for gathering injury data, the degree of content contamination and deficiency in safety climate...

  1. On the Importance of Strengthening Moderate Beliefs in Climate Science to Foster Support for Immediate Action

    E-Print Network [OSTI]

    Wendling, Zachary A.; Attari, Shahzeen Z.; Carley, Sanya R.; Krause, Rachel M.; Warren, David C.; Rupp, John A.; Graham, John D.

    2013-12-03

    Whereas many studies focus on climate skeptics to explain the lack of support for immediate action on climate change, this research examines the effect of moderate believers in climate science. Using data from a representative survey of 832 Indiana...

  2. Building equity : the evolution and efficacy of Montgomery County's moderately priced dwelling unit legislation

    E-Print Network [OSTI]

    Jakabovics, Andrew, 1976-

    2004-01-01

    This thesis describes the history of Montgomery County, Maryland's Moderately Priced Dwelling Unit (MPDU) law. Passed in 1973, it is the oldest inclusionary zoning legislation in the country. The law emerged out of three ...

  3. Surface Signature of Flow Past a Sphere at Moderate Reynolds Numbers 

    E-Print Network [OSTI]

    Shao, Qi

    2014-04-29

    The incompressible viscous flow past a sphere is investigated numerically at moderate Reynolds numbers. Periodic vortex shedding happens at these Reynolds numbers. The primary objective is to identify the surface signature when the wake reaches...

  4. Population consequences of maternal effects: sex-bias in egg-laying order facilitates divergence in sexual dimorphism between

    E-Print Network [OSTI]

    Badyaev, Alex

    in sexual dimorphism between bird populations A. V. BADYAEV,* G. E. HILL & L. A. WHITTINGHAMà *Division Keywords: egg-laying order; growth; maternal effects; population divergence; sex-ratio; sexual dimorphism of these maternal adjustments was fast phenotypic change in sexual size dimorphism within and between populations

  5. MOSFET Operation in Weak and Moderate Inversion R.R. Harrison The MOS Transistor in Weak Inversion

    E-Print Network [OSTI]

    Harrison, Reid R.

    exponentially with decreasing gate voltage. Depletion Weak inversion Moderate inversion Strong inversion VGB VT0 axis: Weak inversion Moderate inversion Strong inversion VGB VT0 QI = -Cox(VGB ­ VT0) log |QI| QI -exp(VGB

  6. Test of two hypotheses explaining the size of populations in a system of cities

    E-Print Network [OSTI]

    Vitanov, Nikolay K

    2015-01-01

    Two classical hypotheses are examined about the population growth in a system of cities: Hypothesis 1 pertains to Gibrat's and Zipf's theory which states that the city growth-decay process is size independent; Hypothesis 2 pertains to the so called Yule process which states that the growth of populations in cities happens when (i) the distribution of the city population initial size obeys a log-normal function, (ii) the growth of the settlements follows a stochastic process. The basis for the test is some official data on Bulgarian cities at various times. This system was chosen because (i) Bulgaria is a country for which one does not expect biased theoretical conditions; (ii) the city populations were determined rather precisely. The present results show that: (i) the population size growth of the Bulgarian cities is size dependent, whence Hypothesis 1 is not confirmed for Bulgaria; (ii) the population size growth of Bulgarian cities can be described by a double Pareto log-normal distribution, whence Hypothe...

  7. The Consistent Kinetics Porosity (CKP) Model: A Theory for the Mechanical Behavior of Moderately Porous Solids

    SciTech Connect (OSTI)

    BRANNON,REBECCA M.

    2000-11-01

    A theory is developed for the response of moderately porous solids (no more than {approximately}20% void space) to high-strain-rate deformations. The model is consistent because each feature is incorporated in a manner that is mathematically compatible with the other features. Unlike simple p-{alpha} models, the onset of pore collapse depends on the amount of shear present. The user-specifiable yield function depends on pressure, effective shear stress, and porosity. The elastic part of the strain rate is linearly related to the stress rate, with nonlinear corrections from changes in the elastic moduli due to pore collapse. Plastically incompressible flow of the matrix material allows pore collapse and an associated macroscopic plastic volume change. The plastic strain rate due to pore collapse/growth is taken normal to the yield surface. If phase transformation and/or pore nucleation are simultaneously occurring, the inelastic strain rate will be non-normal to the yield surface. To permit hardening, the yield stress of matrix material is treated as an internal state variable. Changes in porosity and matrix yield stress naturally cause the yield surface to evolve. The stress, porosity, and all other state variables vary in a consistent manner so that the stress remains on the yield surface throughout any quasistatic interval of plastic deformation. Dynamic loading allows the stress to exceed the yield surface via an overstress ordinary differential equation that is solved in closed form for better numerical accuracy. The part of the stress rate that causes no plastic work (i.e-, the part that has a zero inner product with the stress deviator and the identity tensor) is given by the projection of the elastic stressrate orthogonal to the span of the stress deviator and the identity tensor.The model, which has been numerically implemented in MIG format, has been exercised under a wide array of extremal loading and unloading paths. As will be discussed in a companion sequel report, the CKP model is capable of closely matching plate impact measurements for porous materials.

  8. Remarkable waxing, waning, and wandering of populations of Mimulus guttatus: An unexpected example of global warming

    SciTech Connect (OSTI)

    Vickery, R.K. Jr.

    1999-04-01

    The purpose of this study was to observe the dynamics of a meta-population of Mimulus guttatus. Changes in size and location of 16 original populations and the new populations established in their vicinities in Big Cottonwood Canyon, Salt Lake county, Utah, were observed for 25 yr. Twenty-three new populations appeared. Seven original populations and 13 new populations had become extinct by the end of the observation period in 1996. Many populations died out and were reestablished, often repeatedly, during the observation period. Altogether there were 54 population disappearances and 34 reappearances. Many populations changed size as much as 100-fold or more from year to year. There were spectacular examples of populations expanding to fill newly available, large habitats. Frequent extinctions were due overwhelmingly to the canyon drying trend, which led to the drying up of most Mill D North drainage springs, creeks, and ponds. Precipitation and minimum temperatures increased moderately during the observation period. The growing season lengthened almost 50%, a typical consequence of global warming. The drying trend, lengthened growing season, and disappearance of Mimulus populations in Big Cottonwood Canyon appear to be a clear, local example of global warming.

  9. Diversity waves in collapse-driven population dynamics

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

    Maslov, Sergei; Sneppen, Kim

    2015-09-14

    Populations of species in ecosystems are often constrained by availability of resources within their environment. In effect this means that a growth of one population, needs to be balanced by comparable reduction in populations of others. In neutral models of biodiversity all populations are assumed to change incrementally due to stochastic births and deaths of individuals. Here we propose and model another redistribution mechanism driven by abrupt and severe collapses of the entire population of a single species freeing up resources for the remaining ones. This mechanism may be relevant e.g. for communities of bacteria, with strain-specific collapses caused e.g.more »by invading bacteriophages, or for other ecosystems where infectious diseases play an important role. The emergent dynamics of our system is cyclic ‘‘diversity waves’’ triggered by collapses of globally dominating populations. The population diversity peaks at the beginning of each wave and exponentially decreases afterwards. Species abundances are characterized by a bimodal time-aggregated distribution with the lower peak formed by populations of recently collapsed or newly introduced species while the upper peak - species that has not yet collapsed in the current wave. In most waves both upper and lower peaks are composed of several smaller peaks. This self-organized hierarchical peak structure has a long-term memory transmitted across several waves. It gives rise to a scale-free tail of the time-aggregated population distribution with a universal exponent of 1.7. We show that diversity wave dynamics is robust with respect to variations in the rules of our model such as diffusion between multiple environments, species-specific growth and extinction rates, and bet-hedging strategies.« less

  10. The cost of males in non-equilibrium populations Curtis M. Lively

    E-Print Network [OSTI]

    Lively, Curt

    . Mathematical methods: The cost of males per reproductive time step was calculated as the ratio of the per-capita population. This reduction in the per-capita growth rate has been called the `cost of males' (Maynard SmithThe cost of males in non-equilibrium populations Curtis M. Lively Department of Biology, Indiana

  11. Population, Economy and Energy Use’s Influence on Sulfur Emissions in the United States Since 1900 

    E-Print Network [OSTI]

    Kissock, J. K.; Husar, R. B.

    1990-01-01

    and the transition from coal to less sulfur intensive fuels have reduced sulfur emissions. The net effect of all drivers has been moderate growth in sulfur emissions from 1900 to present. Since 1973, increased energy efficiency and the shift from an industrial to a...

  12. Principles of Population Health Science Population Health 795

    E-Print Network [OSTI]

    Sheridan, Jennifer

    1 Principles of Population Health Science Population Health 795 A course in the Program in Population Health Fall 2011 University of Wisconsin-Madison, School of Medicine and Public Health OVERVIEW Despite significant advances in medicine and public health, inequities in health persist. Understanding

  13. Vibrio fischeri exhibit the growth advantage in stationary-phase Branden Petrun and C. Phoebe Lostroh

    E-Print Network [OSTI]

    McFall-Ngai, Margaret

    in the sand for the day. As the squid sleeps, the cycle of bacterial population growth in the light organ, to avoid casting a shadow (Jones and Nishiguchi 2004). The bacteria make light ex

  14. Population and Climate Change:Population and Climate Change: Coupling Population Models withCoupling Population Models with

    E-Print Network [OSTI]

    Maryland at College Park, University of

    Coupling Population Models with Earth System ModelsEarth System Models Eugenia Kalnay, Safa Motesharrei, Jorge Rivas Change: Fully Coupling Population and Earth System Models" My research at the U. of Maryland #12

  15. Population Density by County, 2000

    SciTech Connect (OSTI)

    None

    2009-01-18

    Map showing a United States profile including race, population by sex and age, housing tenure, and more.

  16. 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.

  17. 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...

  18. 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...

  19. 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.

  20. POPULATION III HYPERNOVAE

    SciTech Connect (OSTI)

    Smidt, Joseph; Whalen, Daniel J. [T-2, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Wiggins, Brandon K. [Department of Physics and Astronomy, Brigham Young University, Provo, UT 84602 (United States); Even, Wesley; Fryer, Chris L. [CCS-2, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Johnson, Jarrett L., E-mail: dwhalen1999@gmail.com [XTD-PRI, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

    2014-12-20

    Population III supernovae have been of growing interest of late for their potential to directly probe the properties of the first stars, particularly the most energetic events that are visible near the edge of the observable universe. Until now, hypernovae, the unusually energetic Type Ib/c supernovae that are sometimes associated with gamma-ray bursts, have been overlooked as cosmic beacons at the highest redshifts. In this, the latest of a series of studies on Population III supernovae, we present numerical simulations of 25-50 M {sub ?} hypernovae and their light curves done with the Los Alamos RAGE and SPECTRUM codes. We find that they will be visible at z = 10-15 to the James Webb Space Telescope and z = 4-5 to the Wide-Field Infrared Survey Telescope, tracing star formation rates in the first galaxies and at the end of cosmological reionization. If, however, the hypernova crashes into a dense shell ejected by its progenitor, it is expected that a superluminous event will occur that may be seen at z ? 20 in the first generation of stars.

  1. Water, Electric Power and Growth in Southern Arizona

    E-Print Network [OSTI]

    Scott, Christopher

    . #12;Growth City of Tucson: Department of Urban Planning and Design. 2008. Pima County Population and Regional Development University of Arizona #12;The Water-Energy Nexus Goldstein, Robert. 2006. Electric Power/Water Sustainability. Western Region Energy-Water Needs Assessment Workshop, Salt Lake City. #12

  2. GROWTH RATE OF THE SAND CRAB, EMERITA ANALOGA, (HIPPIDAE) IN TWO DIFFERENT ENVIRONMENTS

    E-Print Network [OSTI]

    GROWTH RATE OF THE SAND CRAB, EMERITA ANALOGA, (HIPPIDAE) IN TWO DIFFERENT ENVIRONMENTS CRAIG of the present work. This study is an analysis of the growth rate in two nearby populations of the sand crab. tions are not considered here. The crab normally lives between high and low tide marks buried in sand

  3. Impact of body condition on plasma leptin and insulin-like growth factor-I concentrations in stallions and geldings 

    E-Print Network [OSTI]

    Chancellor, Tommy Neal

    2009-05-15

    The objective of this study was to more clearly define the relationship between body condition, plasma leptin and insulin-like growth factor-I (IGF-I) in stallions and geldings in moderate (5.0-5.5) versus fleshy (7.0-7.5) ...

  4. USING COGNITIVE MODELING TO STUDY BEHAVIOR MODERATORS: PRE-TASK APPRAISAL AND ANXIETY

    E-Print Network [OSTI]

    Ritter, Frank

    evaluation of the situation. Task appraisals can be further specified as pre-task or post-task appraisals moderators: Pre-task appraisal and anxiety. In Proceedings of the Human Factors and Ergonomics Society. 2121-2125. Santa Monica, CA: Human Factors and Ergonomics Society. #12;processor, some working memory or activation

  5. Global Moderate Resolution Imaging Spectroradiometer (MODIS) cloud detection and height evaluation using CALIOP

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Global Moderate Resolution Imaging Spectroradiometer (MODIS) cloud detection and height evaluation Spectroradiometer (MODIS) cloud detection and height evaluation using CALIOP, J. Geophys. Res., 113, D00A19, doi:10] with plans to continue the cloud record using the next generation of polar orbiting sensors. A ``Climate

  6. FRC on the Path to Fusion Energy (Moderate Density Steady-State Approach)

    E-Print Network [OSTI]

    to start from already formed FRC) Plasma measurement in RMF frame of reference so s RMF r Br T *2 22 µ1 FRC on the Path to Fusion Energy (Moderate Density Steady-State Approach) Alan Hoffman Redmond Plasma Physics Laboratory University of Washington (FPA Meeting on Fusion Pathways to the Future

  7. Short term effects of moderate carbon prices on land use in the New Zealand emissions trading

    E-Print Network [OSTI]

    Silver, Whendee

    Short term effects of moderate carbon prices on land use in the New Zealand emissions trading Zealand Emissions Trading Scheme (NZ ETS) was introduced through the Climate Change Response Act............................................................................ 14 #12;1 1 Introduction The New Zealand Emissions Trading Scheme (NZ ETS) was legislated through

  8. How moderate sea states can generate loud seismic noise in the deep ocean

    E-Print Network [OSTI]

    Stutzmann, Eléonore

    the signals recorded at coastal seismic stations. Our interpretation is based on the analysis of noiseHow moderate sea states can generate loud seismic noise in the deep ocean M. J. Obrebski,1 F from two distant storms can be a strong deep-water source of seismic noise, dominating temporarily

  9. Recent Trends in Graduate Software Engineering Mark Ardis (Moderator) Shawn Bohner

    E-Print Network [OSTI]

    Ardis, Mark

    Recent Trends in Graduate Software Engineering Mark Ardis (Moderator) Shawn Bohner Stevens.sedano@sv.cmu.edu Abstract This panel will discuss recent trends in graduate software engineering programs, including of software engineering to other disciplines, such as computer science and systems engineering. 1. Position

  10. IDAHO NATIONAL LABORATORY TRANSPORTATION TASK REPORT ON ACHIEVING MODERATOR EXCLUSION AND SUPPORTING STANDARDIZED TRANSPORTATION

    SciTech Connect (OSTI)

    D.K. Morton

    2011-09-01

    Following the defunding of the Yucca Mountain Project, it is reasonable to assume that commercial used fuel will remain in storage for the foreseeable future. This report proposes supplementing the ongoing research and development work related to potential degradation of used fuel, baskets, poisons, and storage canisters during an extended period of storage with a parallel path. This parallel path can assure criticality safety during transportation by implementing a concept that achieves moderator exclusion (no in-leakage of moderator into the used fuel cavity). Using updated risk assessment insights for additional technical justification and relying upon a component inside of the transportation cask that provides a watertight function, a strong argument can be made that moderator intrusion is not credible and should not be a required assumption for criticality evaluations during normal conditions of transportation. A demonstrating testing program supporting a detailed analytical effort as well as updated risk assessment insights can provide the basis for moderator exclusion during hypothetical accident conditions. This report also discusses how this engineered concept can support the goal of standardized transportation.

  11. Coriolis Effect on Dynamic Stall in a Vertical Axis Wind Turbine at Moderate Reynolds Number

    E-Print Network [OSTI]

    Colonius, Tim

    Coriolis Effect on Dynamic Stall in a Vertical Axis Wind Turbine at Moderate Reynolds Number Hsieh-scale Reynolds number in order to investigate the sep- arated flow occurring on a vertical-axis wind turbine SSPM the sinusoidal surging-pitching motion VAWT vertical axis wind turbine I. Introduction Vertical

  12. Mt. Etna tropospheric ash retrieval and sensitivity analysis using Moderate Resolution Imaging

    E-Print Network [OSTI]

    Oxford, University of

    Mt. Etna tropospheric ash retrieval and sensitivity analysis using Moderate Resolution Imaging.pugnaghi@unimore.it, gabriele.gangale@unimore.it Abstract. A retrieval of tropospheric volcanic ash from Mt Etna has been. In order to derive the ash plume optical thickness, the particle effective radius and the total mass

  13. Guiding of cold atoms by a red-detuned laser beam of moderate power

    E-Print Network [OSTI]

    Amsterdam, Universiteit van

    Guiding of cold atoms by a red-detuned laser beam of moderate power B T Wolschrijn, R A Cornelussen laser power (atoms. We systematically study laser power. We systematically study the fraction of guided atoms by varying the main parameters, laser

  14. Proton scattering on carbon nuclei in bichromatic laser field at moderate energies

    E-Print Network [OSTI]

    I. F. Barna; S. Varró

    2015-06-05

    We present the general theory for proton nuclei scattering in a bichromatic laser field. As a physical example we consider proton collision on carbon twelve at 49 MeV/amu moderate energies in the field of a titan sapphire laser with its second harmonic.

  15. Some insight on why Bam (Iran) was destroyed by an earthquake of relatively moderate size

    E-Print Network [OSTI]

    Hatzfeld, Denis

    Some insight on why Bam (Iran) was destroyed by an earthquake of relatively moderate size Michel March 2006; accepted 29 March 2006; published 13 May 2006. [1] The Bam (Iran) earthquake of 2003. Hatzfeld, J. A. Jackson, and E. Haghshenas (2006), Some insight on why Bam (Iran) was destroyed

  16. Impinging laminar jets at moderate Reynolds numbers and separation distances Jeffrey M. Bergthorson,

    E-Print Network [OSTI]

    Impinging laminar jets at moderate Reynolds numbers and separation distances Jeffrey M. Bergthorson an experimental and numerical study of impinging, incompressible, axisym- metric, laminar jets, where the jet axis velocities along the centerline of the flow field. The jet-nozzle pressure drop is measured simultaneously

  17. 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.

  18. The economics of housing lower income populations in South Africa : challenges and opportunities in KwaZulu-Natal

    E-Print Network [OSTI]

    Barriére, Marcella M

    2013-01-01

    Since 1994, approximately three million homes have been built for lower income households in South Africa, but as a result of population growth, immigration, increasing urbanization and systemic inefficiencies, such as ...

  19. A Population Model for the Academic Ecosystem

    E-Print Network [OSTI]

    Wu, Yan; Chiu, Dah Ming

    2015-01-01

    In recent times, the academic ecosystem has seen a tremendous growth in number of authors and publications. While most temporal studies in this area focus on evolution of co-author and citation network structure, this systemic inflation has received very little attention. In this paper, we address this issue by proposing a population model for academia, derived from publication records in the Computer Science domain. We use a generalized branching process as an overarching framework, which enables us to describe the evolution and composition of the research community in a systematic manner. Further, the observed patterns allow us to shed light on researchers' lifecycle encompassing arrival, academic life expectancy, activity, productivity and offspring distribution in the ecosystem. We believe such a study will help develop better bibliometric indices which account for the inflation, and also provide insights into sustainable and efficient resource management for academia.

  20. The impacts of population change on carbon emissions in China during 1978-2008

    SciTech Connect (OSTI)

    Zhu Qin, E-mail: zhuqin@fudan.edu.cn; Peng Xizhe, E-mail: xzpeng@fudan.edu.cn

    2012-09-15

    This study examines the impacts of population size, population structure, and consumption level on carbon emissions in China from 1978 to 2008. To this end, we expanded the stochastic impacts by regression on population, affluence, and technology model and used the ridge regression method, which overcomes the negative influences of multicollinearity among independent variables under acceptable bias. Results reveal that changes in consumption level and population structure were the major impact factors, not changes in population size. Consumption level and carbon emissions were highly correlated. In terms of population structure, urbanization, population age, and household size had distinct effects on carbon emissions. Urbanization increased carbon emissions, while the effect of age acted primarily through the expansion of the labor force and consequent overall economic growth. Shrinking household size increased residential consumption, resulting in higher carbon emissions. Households, rather than individuals, are a more reasonable explanation for the demographic impact on carbon emissions. Potential social policies for low carbon development are also discussed. - Highlights: Black-Right-Pointing-Pointer We examine the impacts of population change on carbon emissions in China. Black-Right-Pointing-Pointer We expand the STIRPAT model by containing population structure factors in the model. Black-Right-Pointing-Pointer The population structure includes age structure, urbanization level, and household size. Black-Right-Pointing-Pointer The ridge regression method is used to estimate the model with multicollinearity. Black-Right-Pointing-Pointer The population structure plays a more important role compared with the population size.

  1. Hanford Area 1990 population and 50-year projections. [Appendix contains computer programming for population projections and graphs showing them by grid areas

    SciTech Connect (OSTI)

    Beck, D.M.; Scott, M.J.; Shindle, S.F.; Napier, B.A.; Thurman, A.G.; Batishko, N.C. (Pacific Northwest Lab., Richland, WA (United States)); Davis, M.D. (Westinghouse Hanford Co., Richland, WA (United States)); Pittenger, D.B. (Demographics Lab., Olympia, WA (United States))

    1991-10-01

    The complex and comprehensive safety analysis activities carried out at Hanford for nonreactor nuclear facilities require data from a number of scientific and engineering disciplines. The types of data that are required include data pertaining to current population and population projections. The types of data found in this document include 1990 census totals for residential population within a 50-mile radius of the 100-N, 200, 300, and 400 Area meteorological towers. This document also contains 50-year projections for residential populations within a 50-mile radius of these four meteorological towers. The analysis of population projections indicates that residential population within a 50-mile radius of the four meteorological towers in question will continue to grow through 2040, although at a slower rate each decade. In all cases, the highest growth is projected for the decade ending in the year 2000. The annual growth rate for this period is projected to be 0.646, 0.633, 0.543, and 0.570 in the 100-N, 200, 300, and 400 Areas, respectively. By 2040, these growth rates are projected to drop to 0.082, 0.068, 0.078, 0.078, respectively. 4 refs., 1 figs., 4 tabs.

  2. Estimated population near uranium tailings

    SciTech Connect (OSTI)

    Bloomster, C.H.; Brown, D.R.; Bruno, G.A.; Craig, S.N.; Dirks, J.A.; Griffin, E.A.; Reis, J.W.; Young, J.K.

    1984-01-01

    Population studies, which took place during the months of April, May, and June 1983, were performed for 27 active and 25 inactive mill sites. For each mill site, a table showing population by radius (1/2, 1, 2, 3, 4, and 5 km) in 16 compass directions was generated. 22 references, 6 tables.

  3. POPULATION GEOGRAPHY Instructor: Dr. Carr

    E-Print Network [OSTI]

    Lopez-Carr, David

    to Mexico's! Why? + net migration of 3 migrants/1000 vs. Mexico ­ net migration of 4/1000 #12;Why do we care: · Spatial patterns and processes · Geographers tend to study migration more than fertility and mortality: #12;HOW DOES POPULATION CHANGE? #12;Population Change = Fertility ­ Mortality +/- Migration #12;Crude

  4. Population Ecology Philip M. Dixon

    E-Print Network [OSTI]

    of populations include the mallard ducks in the Central flyway of the United States, the Daphnia laevis(t) - e(t), (2) where b(t), d(t), i(t), and e(t) are the instantaneous rates of birth, death, immigrationPopulation Ecology Philip M. Dixon Department of Statistics Iowa State University 20 December 2001

  5. 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 ...

  6. Eccentric Braced Frame Design for Moderate Seismic Regions Eric M. Hines, Tufts University, Medford, MA, emhines@lemessurier.com

    E-Print Network [OSTI]

    Hines, Eric

    Eccentric Braced Frame Design for Moderate Seismic Regions Author: Eric M. Hines, Tufts University of low-ductility steel systems designed for moderate seismic regions have generated new interest the 1960's through the 1980's. For these structures, designed prior to modern seismic provisions, eccentric

  7. The Small and Moderate Aperture Research Telescope System A Proposal to Operate the Small Telescopes at CTIO

    E-Print Network [OSTI]

    Walter, Frederick M.

    The Small and Moderate Aperture Research Telescope System (SMARTS) A Proposal to Operate the Small Observatory #12; The Small and Moderate Aperture Research Telescope System (SMARTS) ABSTRACT We propose to operate four telescopes located at the Cerro Tololo Interamerican Observatory (CTIO) for the period from

  8. Policy on the Moderation of Assessment: Approved by the Senate, 22 May 2013 Heriot-Watt University

    E-Print Network [OSTI]

    Painter, Kevin

    1 Policy on the Moderation of Assessment: Approved by the Senate, 22 May 2013 Heriot-Watt University Policy on the Moderation of Assessment With diversity in form of assessment across multi in all disciplines, across all Schools and in all modes or locations of study. The University Policy

  9. 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.

  10. 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 ...

  11. Locally-Adaptive, Spatially-Explicit Projection of U.S. Population for 2030 and 2050

    SciTech Connect (OSTI)

    McKee, Jacob J [ORNL; Rose, Amy N [ORNL; Bright, Eddie A [ORNL; Huynh, Timmy N [ORNL; Bhaduri, Budhendra L [ORNL

    2015-01-01

    Localized adverse events, including natural hazards, epidemiological events, and human conflict, underscore the criticality of quantifying and mapping current population. Moreover, knowing the spatial distribution of future population allows for increased preparation in the event of an emergency. Building on the spatial interpolation technique previously developed for high resolution population distribution data (LandScan Global and LandScan USA), we have constructed an empirically-informed spatial distribution of the projected population of the contiguous U.S. for 2030 and 2050. Whereas most current large-scale, spatially explicit population projections typically rely on a population gravity model to determine areas of future growth, our projection model departs from these by accounting for multiple components that affect population distribution. Modelled variables, which included land cover, slope, distances to larger cities, and a moving average of current population, were locally adaptive and geographically varying. The resulting weighted surface was used to determine which areas had the greatest likelihood for future population change. Population projections of county level numbers were developed using a modified version of the U.S. Census s projection methodology with the U.S. Census s official projection as the benchmark. Applications of our model include, but are not limited to, suitability modelling, service area planning for governmental agencies, consequence assessment, mitigation planning and implementation, and assessment of spatially vulnerable populations.

  12. Inferring population history from genealogies 

    E-Print Network [OSTI]

    Lohse, Konrad R.

    2010-01-01

    This thesis investigates a range of genealogical approaches to making quantitative inferences about the spatial and demographic history of populations with application to two insect systems: A local radiation of high ...

  13. 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...

  14. 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,

  15. 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

  16. Moderate forest disturbance as a stringent test for gap and big-leaf models

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

    Bond-Lamberty, Benjamin; Fisk, Justin P.; Holm, Jennifer; Bailey, Vanessa L.; Bohrer, Gil; Gough, Christopher

    2015-01-27

    Disturbance-induced tree mortality is a key factor regulating the carbon balance of a forest, but tree mortality and its subsequent effects are poorly represented processes in terrestrial ecosystem models. It is thus unclear whether models can robustly simulate moderate (non-catastrophic) disturbances, which tend to increase biological and structural complexity and are increasingly common in aging US forests. We tested whether three forest ecosystem models – Biome-BGC (BioGeochemical Cycles), a classic big-leaf model, and the ZELIG and ED (Ecosystem Demography) gap-oriented models – could reproduce the resilience to moderate disturbance observed in an experimentally manipulated forest (the Forest Accelerated Succession Experimentmore »in northern Michigan, USA, in which 38% of canopy dominants were stem girdled and compared to control plots). Each model was parameterized, spun up, and disturbed following similar protocols and run for 5 years post-disturbance. The models replicated observed declines in aboveground biomass well. Biome-BGC captured the timing and rebound of observed leaf area index (LAI), while ZELIG and ED correctly estimated the magnitude of LAI decline. None of the models fully captured the observed post-disturbance C fluxes, in particular gross primary production or net primary production (NPP). Biome-BGC NPP was correctly resilient but for the wrong reasons, and could not match the absolute observational values. ZELIG and ED, in contrast, exhibited large, unobserved drops in NPP and net ecosystem production. The biological mechanisms proposed to explain the observed rapid resilience of the C cycle are typically not incorporated by these or other models. It is thus an open question whether most ecosystem models will simulate correctly the gradual and less extensive tree mortality characteristic of moderate disturbances.« less

  17. Moderate forest disturbance as a stringent test for gap and big-leaf models

    SciTech Connect (OSTI)

    Bond-Lamberty, Benjamin; Fisk, Justin P.; Holm, Jennifer; Bailey, Vanessa L.; Bohrer, Gil; Gough, Christopher

    2015-01-01

    Disturbance-induced tree mortality is a key factor regulating the carbon balance of a forest, but tree mortality and its subsequent effects are poorly represented processes in terrestrial ecosystem models. It is thus unclear whether models can robustly simulate moderate (non-catastrophic) disturbances, which tend to increase biological and structural complexity and are increasingly common in aging US forests. We tested whether three forest ecosystem models – Biome-BGC (BioGeochemical Cycles), a classic big-leaf model, and the ZELIG and ED (Ecosystem Demography) gap-oriented models – could reproduce the resilience to moderate disturbance observed in an experimentally manipulated forest (the Forest Accelerated Succession Experiment in northern Michigan, USA, in which 38% of canopy dominants were stem girdled and compared to control plots). Each model was parameterized, spun up, and disturbed following similar protocols and run for 5 years post-disturbance. The models replicated observed declines in aboveground biomass well. Biome-BGC captured the timing and rebound of observed leaf area index (LAI), while ZELIG and ED correctly estimated the magnitude of LAI decline. None of the models fully captured the observed post-disturbance C fluxes, in particular gross primary production or net primary production (NPP). Biome-BGC NPP was correctly resilient but for the wrong reasons, and could not match the absolute observational values. ZELIG and ED, in contrast, exhibited large, unobserved drops in NPP and net ecosystem production. The biological mechanisms proposed to explain the observed rapid resilience of the C cycle are typically not incorporated by these or other models. It is thus an open question whether most ecosystem models will simulate correctly the gradual and less extensive tree mortality characteristic of moderate disturbances.

  18. Electrokinetic removal of charged contaminant species from soil and other media using moderately conductive adsorptive materials

    DOE Patents [OSTI]

    Lindgren, Eric R. (Albuquerque, NM); Mattson, Earl D. (Idaho Falls, ID)

    2001-01-01

    Method for collecting and concentrating charged species, specifically, contaminant species in a medium, preferably soil. The method utilizes electrokinesis to drive contaminant species into and through a bed adjacent to a drive electrode. The bed comprises a moderately electrically conductive adsorbent material which is porous and is infused with water or other solvent capable of conducting electrical current. The bed material, preferably activated carbon, is easily removed and disposed of. Preferably, where activated carbon is used, after contaminant species are collected and concentrated, the mixture of activated carbon and contaminant species is removed and burned to form a stable and easily disposable waste product.

  19. Measurement and fitting of spectrum and pulse shapes of a liquid methane moderator at IPNS

    SciTech Connect (OSTI)

    Carpenter, J.M.; Robinson, R.A.; Taylor, A.D.

    1983-01-01

    We have measured the absolute intensity, and the energy spectrum, and the pulse shapes as function of neutron energy for the IPNS liquid CH/sub 4/ F moderator, at 108 K. We have fitted the spectrum, corrected for attenuation by aluminum in the beam, using a new cutoff function and fitted the pulse shapes to a new function which is the sum of two decaying exponentials, convoluted with a gaussian, and determined the wavelength variation of the parameters. We present here the results of a preliminary analysis.

  20. Strong words or moderate words: A comparison of the reliability and validity of responses on attitude scales

    E-Print Network [OSTI]

    Frey, Bruce B.; Edwards, Lisa M.

    2011-01-01

    A common assumption in attitude measurement is that items should be composed of strongly worded statements. The presumed benefit of strongly worded statements is that they produce more reliable and valid scores than statements with moderate or weak...

  1. Tuning calcite morphology and growth acceleration by a rational design of highly stable protein-mimetics

    SciTech Connect (OSTI)

    Chen, Chunlong; Qi, Jiahui; Tao, Jinhui; Zuckermann, Ronald; De Yoreo, James J.

    2014-09-05

    In nature, proteins play a significant role in biomineral formation. One of the ultimate goals of bioinspired materials science is to develop highly stable synthetic molecules that mimic the function of these natural proteins by controlling crystal formation. Here, we demonstrate that both the morphology and the degree of acceleration or inhibition observed during growth of calcite in the presence of peptoids can be rationally tuned by balancing the electrostatic interactions (EI) and hydrophobic interactions (HI), with HI playing the dominant role. While either strong EI or HI inhibit growth and suppress (104) face expression, correlations between peptoid-crystal binding energies and observed changes in calcite growth indicate moderate EI allow peptoids to weakly adsorb while moderate HI cause disruption of surface-adsorbed water layers, leading to growth acceleration with retained expression of (104) faces. This study provides fundamental principles for designing peptoids as crystallization promoters, and offers a straightforward screening method based on macroscopic crystal morphology. Because peptoids are sequence-specific, highly stable, and easily synthesized, peptoid-enhanced crystallization offers a broad range of potential applications.

  2. Standard Practice for Design of Surveillance Programs for Light-Water Moderated Nuclear Power Reactor Vessels

    E-Print Network [OSTI]

    American Society for Testing and Materials. Philadelphia

    2010-01-01

    1.1 This practice covers procedures for designing a surveillance program for monitoring the radiation-induced changes in the mechanical properties of ferritic materials in light-water moderated nuclear power reactor vessels. This practice includes the minimum requirements for the design of a surveillance program, selection of vessel material to be included, and the initial schedule for evaluation of materials. 1.2 This practice was developed for all light-water moderated nuclear power reactor vessels for which the predicted maximum fast neutron fluence (E > 1 MeV) at the end of license (EOL) exceeds 1 × 1021 neutrons/m2 (1 × 1017 n/cm2) at the inside surface of the reactor vessel. 1.3 This practice applies only to the planning and design of surveillance programs for reactor vessels designed and built after the effective date of this practice. Previous versions of Practice E185 apply to earlier reactor vessels. 1.4 This practice does not provide specific procedures for monitoring the radiation induced cha...

  3. 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 ...

  4. A Multivariate Model for Predicting Population Fluctuations of Dreissena polymorpha in North American Lakes

    E-Print Network [OSTI]

    Padilla, Dianna

    . Received March 14, 1991 Reçu le 14 mars 1991 Accepted July 30, 1991 Accepté le 30 juillet 1991 (JA944). For example, the abundance, growth habit, and population dynamics of lamprey (Petromyzon mar- inus), smelt and feeding type that were not previously repres- ented in these newly colonized lakes. In the past we have

  5. A Unifying Theory for Scaling Laws of Human Populations

    E-Print Network [OSTI]

    Lin, Henry W

    2015-01-01

    The spatial distribution of people exhibits clustering across a wide range of scales, from household (~$10^{-2}$ km) to continental (~$10^4$ km) scales. Empirical data indicates simple power-law scalings for the size distribution of cities (known as Zipf's law), the geographic distribution of friends, and the population density fluctuations as a function of scale. We derive a simple statistical model that explains all of these scaling laws based on a single unifying principle involving the random spatial growth of clusters of people on all scales. The model makes important new predictions for the spread of diseases and other social phenomena.

  6. SUB-POPULATION BRAIN ATLASES

    E-Print Network [OSTI]

    Thompson, Paul

    SUB-POPULATION BRAIN ATLASES Paul Thompson PhD, Michael S. Mega MD PhD, and Arthur W. Toga PhD Laboratory of Neuro Imaging, Brain Mapping Division and Alzheimer's Disease Center Dept. of Neurology, UCLA School of Medicine, Los Angeles, CA 90095-1769 A Chapter in: Brain Mapping: The Methods (2nd Edition

  7. When tree rings behave like foam: moderate historical decrease in the mean ring density of common beech paralleling a strong historical growth increase

    E-Print Network [OSTI]

    Recanati, Catherine

    to wood quality, and biomass/carbon sequestration issues. The anecdotic available material suggests an issue for forest carbon accounting. Keywords: Fagus sylvatica; wood density; X-ray microdensitometry

  8. EO 12898: Environmental Justice in Minority Populations and Low...

    Energy Savers [EERE]

    2898: Environmental Justice in Minority Populations and Low-Income Populations EO 12898: Environmental Justice in Minority Populations and Low-Income Populations To focus Federal...

  9. Fluorescence modulation in single CdSe quantum dots by moderate applied electric fields

    SciTech Connect (OSTI)

    LeBlanc, Sharonda J. [Department of Physics and Optical Science, University of North Carolina at Charlotte, 9201 University City Boulevard, Charlotte, North Carolina 28223 (United States); Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, 9201 University City Boulevard, Charlotte, North Carolina 28223 (United States); McClanahan, Mason R.; Moyer, Tully; Moyer, Patrick J. [Department of Physics and Optical Science, University of North Carolina at Charlotte, 9201 University City Boulevard, Charlotte, North Carolina 28223 (United States); Jones, Marcus [Department of Chemistry, University of North Carolina at Charlotte, 9201 University City Boulevard, Charlotte, North Carolina 28223 (United States)

    2014-01-21

    Single molecule time-resolved fluorescence spectroscopy of CdSe/ZnS core-shell quantum dots (QDs) under the influence of moderate applied electric fields reveals distributed emission from states which are neither fully on nor off and pronounced changes in the excited state decay. The data suggest that a 54?kV/cm applied electric field causes small perturbations to the QD surface charge distribution, effectively increasing the surface trapping probability and resulting in the appearance of gray states. We present simultaneous blinking and fluorescence decay results for two sets of QDs, with and without an applied electric field. Further kinetic modeling analysis suggests that a single trapped charged cannot be responsible for a blinking off event.

  10. Standard Guide for In-Service Annealing of Light-Water Moderated Nuclear Reactor Vessels

    E-Print Network [OSTI]

    American Society for Testing and Materials. Philadelphia

    2003-01-01

    1.1 This guide covers the general procedures to be considered for conducting an in-service thermal anneal of a light-water moderated nuclear reactor vessel and demonstrating the effectiveness of the procedure. The purpose of this in-service annealing (heat treatment) is to improve the mechanical properties, especially fracture toughness, of the reactor vessel materials previously degraded by neutron embrittlement. The improvement in mechanical properties generally is assessed using Charpy V-notch impact test results, or alternatively, fracture toughness test results or inferred toughness property changes from tensile, hardness, indentation, or other miniature specimen testing (1). 1.2 This guide is designed to accommodate the variable response of reactor-vessel materials in post-irradiation annealing at various temperatures and different time periods. Certain inherent limiting factors must be considered in developing an annealing procedure. These factors include system-design limitations; physical constrain...

  11. Intermediate-energy Coulomb excitation of 104Sn: Moderate E2 strength decrease approaching 100Sn

    E-Print Network [OSTI]

    P. Doornenbal; S. Takeuchi; N. Aoi; M. Matsushita; A. Obertelli; D. Steppenbeck; H. Wang; L. Audirac; H. Baba; P. Bednarczyk; S. Boissinot; M. Ciemala; A. Corsi; T. Furumoto; T. Isobe; A. Jungclaus; V. Lapoux; J. Lee; K. Matsui; T. Motobayashi; D. Nishimura; S. Ota; E. C. Pollacco; H. Sakurai; C. Santamaria; Y. Shiga; D. Sohler; R. Taniuchi

    2013-05-13

    The reduced transition probability B(E2) of the first excited 2+ state in the nucleus 104Sn was measured via Coulomb excitation in inverse kinematics at intermediate energies. A value of 0.163(26) e^2b^2 was extracted from the absolute cross-section on a Pb target, while the method itself was verified with the stable 112Sn isotope. Our result deviates significantly from the earlier reported value of 0.10(4) e^2b^2 and corresponds to a moderate decrease of excitation strength relative to the almost constant values observed in the proton-rich, even-A 106-114Sn isotopes. Present state-of-the-art shell-model predictions, which include proton and neutron excitations across the N=Z=50 shell closures as well as standard polarization charges, underestimate the experimental findings

  12. 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?

  13. The Neutron Energy Spectrum Study from the Phase II Solid Methane Moderator at the LENS Neutron Source

    E-Print Network [OSTI]

    Yunchang Shin; W. Mike Snow; Christopher M. Lavelle; David V. Baxter; Xin Tong; Haiyang Yan; Mark Leuschner

    2007-11-19

    Neutron energy spectrum measurements from a solid methane moderator were performed at the Low Energy Neutron Source (LENS) at Indiana University Cyclotron Facility (IUCF) to verify our neutron scattering model of solid methane. The time-of-flight method was used to measure the energy spectrum of the moderator in the energy range of 0.1$meV\\sim$ 1$eV$. Neutrons were counted with a high efficiency $^{3}{He}$ detector. The solid methane moderator was operated in phase II temperature and the energy spectra were measured at the temperatures of 20K and 4K. We have also tested our newly-developed scattering kernels for phase II solid methane by calculating the neutron spectral intensity expected from the methane moderator at the LENS neutron source using MCNP (Monte Carlo N-particle Transport Code). Within the expected accuracy of our approximate approach, our model predicts both the neutron spectral intensity and the optimal thickness of the moderator at both temperatures. The predictions are compared to the measured energy spectra. The simulations agree with the measurement data at both temperatures.

  14. Adequacy of the 123-group cross-section library for criticality analyses of water-moderated uranium systems

    SciTech Connect (OSTI)

    Parks, C.V.; Wright, R.Q.; Jordan, W.C. [Oak Ridge National Lab., TN (United States)

    1995-08-01

    In a recent criticality analysis for an array of water-moderated packages containing highly enriched uranium, the 123-group cross-section library in the SCALE system was observed to have a nonconservative discrepancy of approximately 3 to 3.5% when compared with more recently developed libraries. A simple representative system of UO{sub 2}F{sub 2}-H{sub 2}O was used to identify that the problem results from a lack of resonance data for {sup 235}U. Only a single set of self-shielded cross sections, most likely corresponding to a water-moderated infinite dilute system, was provided with the original data. The UO{sub 2}F{sub 2}-H{sub 2}O study indicates that this limitation may cause nonconservative discrepancies as high as 5.5% for some water-moderated, highly enriched uranium systems. Characteristics of the systems where the discrepancy is evident are identified and discussed.

  15. Resource demand growth and sustainability due to increased world consumption

    SciTech Connect (OSTI)

    Balatsky, Alexander V.; Balatsky, Galina I.; Borysov, Stanislav S.

    2015-03-20

    The paper aims at continuing the discussion on sustainability and attempts to forecast the impossibility of the expanding consumption worldwide due to the planet’s limited resources. As the population of China, India and other developing countries continue to increase, they would also require more natural and financial resources to sustain their growth. We coarsely estimate the volumes of these resources (energy, food, freshwater) and the gross domestic product (GDP) that would need to be achieved to bring the population of India and China to the current levels of consumption in the United States. We also provide estimations for potentially needed immediate growth of the world resource consumption to meet this equality requirement. Given the tight historical correlation between GDP and energy consumption, the needed increase of GDP per capita in the developing world to the levels of the U.S. would deplete explored fossil fuel reserves in less than two decades. These estimates predict that the world economy would need to find a development model where growth would be achieved without heavy dependence on fossil fuels.

  16. Resource demand growth and sustainability due to increased world consumption

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

    Balatsky, Alexander V.; Balatsky, Galina I.; Borysov, Stanislav S.

    2015-03-20

    The paper aims at continuing the discussion on sustainability and attempts to forecast the impossibility of the expanding consumption worldwide due to the planet’s limited resources. As the population of China, India and other developing countries continue to increase, they would also require more natural and financial resources to sustain their growth. We coarsely estimate the volumes of these resources (energy, food, freshwater) and the gross domestic product (GDP) that would need to be achieved to bring the population of India and China to the current levels of consumption in the United States. We also provide estimations for potentially neededmore »immediate growth of the world resource consumption to meet this equality requirement. Given the tight historical correlation between GDP and energy consumption, the needed increase of GDP per capita in the developing world to the levels of the U.S. would deplete explored fossil fuel reserves in less than two decades. These estimates predict that the world economy would need to find a development model where growth would be achieved without heavy dependence on fossil fuels.« less

  17. 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...

  18. Accurate atmospheric parameters at moderate resolution using spectral indices: Preliminary application to the marvels survey

    SciTech Connect (OSTI)

    Ghezzi, Luan; Da Costa, Luiz N.; Maia, Marcio A. G.; Ogando, Ricardo L. C.; Dutra-Ferreira, Letícia; Lorenzo-Oliveira, Diego; Porto de Mello, Gustavo F.; Santiago, Basílio X.; De Lee, Nathan; Lee, Brian L.; Ge, Jian; Wisniewski, John P.; González Hernández, Jonay I.; Stassun, Keivan G.; Cargile, Phillip; Pepper, Joshua; Fleming, Scott W.; Schneider, Donald P.; Mahadevan, Suvrath; Wang, Ji; and others

    2014-12-01

    Studies of Galactic chemical, and dynamical evolution in the solar neighborhood depend on the availability of precise atmospheric parameters (effective temperature T {sub eff}, metallicity [Fe/H], and surface gravity log g) for solar-type stars. Many large-scale spectroscopic surveys operate at low to moderate spectral resolution for efficiency in observing large samples, which makes the stellar characterization difficult due to the high degree of blending of spectral features. Therefore, most surveys employ spectral synthesis, which is a powerful technique, but relies heavily on the completeness and accuracy of atomic line databases and can yield possibly correlated atmospheric parameters. In this work, we use an alternative method based on spectral indices to determine the atmospheric parameters of a sample of nearby FGK dwarfs and subgiants observed by the MARVELS survey at moderate resolving power (R ? 12,000). To avoid a time-consuming manual analysis, we have developed three codes to automatically normalize the observed spectra, measure the equivalent widths of the indices, and, through a comparison of those with values calculated with predetermined calibrations, estimate the atmospheric parameters of the stars. The calibrations were derived using a sample of 309 stars with precise stellar parameters obtained from the analysis of high-resolution FEROS spectra, permitting the low-resolution equivalent widths to be directly related to the stellar parameters. A validation test of the method was conducted with a sample of 30 MARVELS targets that also have reliable atmospheric parameters derived from the high-resolution spectra and spectroscopic analysis based on the excitation and ionization equilibria method. Our approach was able to recover the parameters within 80 K for T {sub eff}, 0.05 dex for [Fe/H], and 0.15 dex for log g, values that are lower than or equal to the typical external uncertainties found between different high-resolution analyses. An additional test was performed with a subsample of 138 stars from the ELODIE stellar library, and the literature atmospheric parameters were recovered within 125 K for T {sub eff}, 0.10 dex for [Fe/H], and 0.29 dex for log g. These precisions are consistent with or better than those provided by the pipelines of surveys operating with similar resolutions. These results show that the spectral indices are a competitive tool to characterize stars with intermediate resolution spectra.

  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. 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

  2. ECOLOGICAL EFFICIENCY OF A PELAGIC MYSID SHRIMP; ESTIMATES FROM GROWTH, ENERGY BUDGET, AND MORTALITY STUDIES'

    E-Print Network [OSTI]

    ECOLOGICAL EFFICIENCY OF A PELAGIC MYSID SHRIMP; ESTIMATES FROM GROWTH, ENERGY BUDGET, AND MORTALITY STUDIES' ROBERT I. CLUTTER' AND GAIL H. THEILACKER' ABSTRACT The net ecological efficiency (yield efficiency (yield/ingested) is probably between 19 % and 29 %. Energy use by the field population

  3. MAMMALIAN POSTNATAL GROWTH ESTIMATES: THE INFLUENCE OF WEANING ON THE CHOICE

    E-Print Network [OSTI]

    Bergmann, Philip J.

    of the postnatal growth of the vertebral column of the Norway rat (Rattus norvegicus), we recorded hind-foot length such as the skull and vertebral column. However, this measur for the comprehension of vertebrate population dynamics and life histories (Lu 2003; Moscarella and Aguilera 1999

  4. Analyses of mixed-hydrocarbon binary thermodynamic cycles for moderate-temperature geothermal resources

    SciTech Connect (OSTI)

    Demuth, O.J.

    1981-02-01

    A number of binary geothermal cycles utilizing mixed hydrocarbon working fluids were analyzed with the overall objective of finding a working fluid which can produce low-cost electrical energy using a moderately-low temperature geothermal resource. Both boiling and supercritical shell-and-tube cycles were considered. The performance of a dual-boiling isobutane cycle supplied by a 280/sup 0/F hydrothermal resource (corresponding to the 5 MW pilot plant at the Raft River site in Idaho) was selected as a reference. To investigate the effect of resource temperature on the choice of working fluid, several analyses were conducted for a 360/sup 0/F hydrothermal resource, which is representative of the Heber resource in California. The hydrocarbon working fluids analyzed included methane, ethane, propane, isobutane, isopentane, hexane, heptane, and mixtures of those pure hydrocarbons. For comparison, two fluorocarbon refrigerants were also analyzed. These fluorocarbons, R-115 and R-22, were suggested as resulting in high values of net plant geofluid effectiveness (watt-hr/lbm geofluid) at the two resource temperatures chosen for the study. Preliminary estimates of relative heat exchanger size (product of overall heat transfer coefficient times heater surface area) were made for a number of the better performing cycles.

  5. 2 x 2 Polyethylene Reflected and Moderated Highly Enriched Uranium System with Rhenium

    SciTech Connect (OSTI)

    A. Nichole Ellis; Jesson Hutchinson; John D. Bess; Dmitry N. Polyakov; Evgeny S. Glushkov; Alexey E. Glushkov

    2010-09-01

    The 2 × 2 array HEU-Re experiment was performed on the Planet universal critical assembly machine on November 4th, 2003 at the Los Alamos Critical Experiments Facility (LACEF) at Los Alamos National Laboratory (LANL). For this experiment, there were 10 ½ units, each full unit containing four HEU foils and two rhenium foils. The top unit contained only two HEU foils and two rhenium foils. A total of 42 HEU foils were used for this experiment. Rhenium is a desirable cladding material for space nuclear power applications. This experiment consisted of HEU foils interleaved with rhenium foils and is moderated and reflected by polyethylene plates. A unit consisted of a polyethylene plate, which has a recess for rhenium foils, and four HEU foils in a single layer in the top recess of each polyethylene plate. The Planet universal criticality assembly machine has been previously used in experiments containing HEU foils interspersed with SiO2 (HEU-MET-THERM-001), Al (HEU-MET-THERM-008), MgO (HEU-MET-THERM-009), Gd foils (HEU-MET-THERM-010), 2 × 2 × 26 Al (HEU-MET-THERM-012), Fe (HEU-MET-THERM-013 and HEU-MET-THERM-015), 2 × 2 × 23 SiO2 (HEU-MET-THERM-014), 2 × 2 × 11 hastalloy plates (HEU-MET-THERM-016), and concrete (HEU-MET-THERM-018). The 2 × 2 array of HEU-Re is considered acceptable for use as a benchmark critical experiment.

  6. Grad's moment method for a granular fluid at moderate densities. Navier-Stokes transport coefficients

    E-Print Network [OSTI]

    Vicente Garzó

    2013-03-18

    The Navier-Stokes transport coefficients of a granular dense fluid of smooth inelastic hard disks or spheres are explicitly determined by solving the inelastic Enskog equation by means of Grad's moment method. The transport coefficients are explicitly determined as functions of the (constant) coefficient of restitution and the solid volume fraction. In addition, the cooling rate is also calculated to first order in the spatial gradients. The calculations are performed for an arbitrary number of dimensions. The results are not limited to small dissipation and are expected to apply at moderate densities. It is found that the expressions of the Navier-Stokes transport coefficients and the cooling rate agree with those previously obtained from the Chapman-Enskog method by using the leading terms in a Sonine polynomial expansion. This shows the equivalence between both methods for granular fluids in the Navier-Stokes approximation. A comparison with previous results derived from Grad's moment method for inelastic disks and spheres is also carried out.

  7. An Active Gain-control System for Avalanche Photo-Diodes under Moderate Temperature Variations

    E-Print Network [OSTI]

    J. Kataoka; R. Sato; T. Ikagawa; J. Kotoku; Y. Kuramoto; Y. Tsubuku; T. Saito; Y. Yatsu; N. Kawai; Y. Ishikawa; N. Kawabata

    2006-02-17

    Avalanche photodiodes (APDs) are promising light sensor for various fields of experimental physics. It has been argued, however, that variation of APD gain with temperature could be a serious problem preventing APDs from replacing traditional photomultiplier tubes (PMTs) in some applications. Here we develop an active gain-control system to keep the APD gain stable under moderate temperature variations. As a performance demonstration of the proposed system, we have tested the response of a scintillation photon detector consisting of a 5x5 mm^2 reverse-type APD optically coupled with a CsI(Tl) crystal. We show that the APD gain was successfully controlled under a temperature variation of DT = 20deg, within a time-cycle of 6000 sec. The best FWHM energy resolution of 6.1+-0.2 % was obtained for 662 keV gamma-rays, and the energy threshold was as low as 6.5 keV, by integrating data from +20deg - 0deg cycles. The corresponding values for -20deg - 0deg cycles were 6.9+-0.2 % and 5.2 keV, respectively. These results are comparable, or only slightly worse than that obtained at a fixed temperature. Our results suggest new potential uses for APDs in various space researches and nuclear physics. As examples, we briefly introduce the NeXT and Cute-1.7 satellite missions that will carry the APDs as scientific instruments for the first time.

  8. Brazil-nut effect versus reverse Brazil-nut effect in a moderately dense granular fluid

    E-Print Network [OSTI]

    Vicente Garzo

    2008-09-03

    A new segregation criterion based on the inelastic Enskog kinetic equation is derived to show the transition between the Brazil-nut effect (BNE) and the reverse Brazil-nut effect (RBNE) by varying the different parameters of the system. In contrast to previous theoretical attempts the approach is not limited to the near-elastic case, takes into account the influence of both thermal gradients and gravity and applies for moderate densities. The form of the phase-diagrams for the BNE/RBNE transition depends sensitively on the value of gravity relative to the thermal gradient, so that it is possible to switch between both states for given values of the mass and size ratios, the coefficients of restitution and the solid volume fraction. In particular, the influence of collisional dissipation on segregation becomes more important when the thermal gradient dominates over gravity than in the opposite limit. The present analysis extends previous results derived in the dilute limit case and is consistent with the findings of some recent experimental results.

  9. Effective shear viscosity and dynamics of suspensions of micro-swimmers at moderate concentrations

    SciTech Connect (OSTI)

    Constantin, Lipnikov [Los Alamos National Laboratory; Gyrya, V [PENNSYLVANIA STATE UNIV.; Aronson, I [ANL; Berlyand, L [PENNSYLVANIA STATE UNIV.

    2009-01-01

    Recently, there have been a number of experimental studies suggesting that a suspension of self-propelled bacteria (microswimmers in general) may have an effective viscosity significantly smaller than the viscosity of the ambient fluid. This is in sharp contrast with suspensions of hard passive inclusions, whose presence always increases the viscosity. Here we present a 2D model for a suspension of microswimmers in a fluid and analyze it analytically in the dilute regime (no swimmer-swimmer interactions) and numerically using a Mimetic Finite Difference discretization. Our analysis shows that in the dilute regime the effective shear viscosity is not affected by self-propulsion. But at the moderate concentrations (due to swimmer-swimmer interactions) the effective viscosity decreases linearly as a function of the propulsion strength of the swimmers. These findings prove that (i) a physically observable decrease of viscosity for a suspension of self-propelled bacteria can be explained purely by hydrodynamic interactions and (ii) self-propulsion and interaction of swimmers are both essential to the reduction of the effective shear viscosity. We performed a number of numerical experiments analyzing the dynamics of swimmers resulting from pairwise interactions. The numerical results agree with the physically observed phenomena (e.g., attraction of swimmer to swimmer and swimmer to the wall). This is viewed as an additional validation of the model and the numerical scheme.

  10. Feedback between Population and Evolutionary Dynamics Determines the Fate of Social Microbial Populations

    E-Print Network [OSTI]

    Sanchez, Alvaro

    The evolutionary spread of cheater strategies can destabilize populations engaging in social cooperative behaviors, thus demonstrating that evolutionary changes can have profound implications for population dynamics. At ...

  11. Arthropod population and community dynamics in turfgrass 

    E-Print Network [OSTI]

    Wang, Yong

    1998-01-01

    Non-target arthropod and nematode populations in ographics. fungal and nematode treated bermudagrass were contrasted with populations in a chlorpyrifos and an untreated control treatment. Fifty-five arthropod families or suborder, herein referred...

  12. 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...

  13. November 2003 / Vol. 53 No. 11 BioScience 1069 Human population growth and increased water

    E-Print Network [OSTI]

    Benstead, Jon

    than 15 me- ters [m]) and small (low-head) dams on tropical island streams. Third, we discuss ways and compare representative effects of a tradi- tional low-head dam to those of alternative methods of water

  14. Risk Analysis for Water Resources Under Climate Change, Population Growth, and Land Use Change

    E-Print Network [OSTI]

    Kiparsky, Michael

    2010-01-01

    to use forecasts." Risk Analysis 25(5): 1265- Oreskes, N. (P. C. (1977). "Mean-Risk Analysis with Risk Associated withChavas, J. -P. (2004). Risk Analysis in Theory and Practice.

  15. Risk Analysis for Water Resources Under Climate Change, Population Growth, and Land Use Change

    E-Print Network [OSTI]

    Kiparsky, Michael

    2010-01-01

    scale. Thus, analysis of flood risk, sub-monthly instream-on water supply risk, and does not address flood risk.water resources modeling, flood risk and water supply risk

  16. Whooping crane (Grus americana) demography and environmental factors in a population growth simulation model 

    E-Print Network [OSTI]

    Gil de Weir, Karine

    2006-08-16

    years of nest monitoring data, and 20 years of winter reports to estimate age-specific mortality and fecundity rates. The resulting life table yielded an intrinsic rate of increase (r) of 0.14/y, a net reproductive rate (Ro) of 6.4/y, and a mean length...

  17. Risk Analysis for Water Resources Under Climate Change, Population Growth, and Land Use Change

    E-Print Network [OSTI]

    Kiparsky, Michael

    2010-01-01

    Potential Evapotranspiration .. 39 2.9.2 Applied water demands 39 2.10 Urban demands and supplies.. 40 2.11 In-stream flows and hydropower .

  18. Risk Analysis for Water Resources Under Climate Change, Population Growth, and Land Use Change

    E-Print Network [OSTI]

    Kiparsky, Michael

    2010-01-01

    R. B. Lammers (2000). "Global water resources: Vulnerabilityin two small watersheds." Water Resources Research 18(3).of a warming climate on water availability in snow-dominated

  19. Risk Analysis for Water Resources Under Climate Change, Population Growth, and Land Use Change

    E-Print Network [OSTI]

    Kiparsky, Michael

    2010-01-01

    Monthly required flows (cfs) based on 1922-1992 averageminimum fishery flow schedules (cfs). Note that in practiceminimum flows in WEAP (cfs). After Table 6-8 in (USBR

  20. Risk Analysis for Water Resources Under Climate Change, Population Growth, and Land Use Change

    E-Print Network [OSTI]

    Kiparsky, Michael

    2010-01-01

    Lach, D. , H. Ingram and S. Rayner (2005). "Maintaining thePielke, R. , G. Prins, S. Rayner and D. Sarewitz (2007). "Nature 445(7128): 597-598. Rayner, S. , D. Lach and H.

  1. 1 NCGR 2003 Connecting metabolic rate and temperature to population growth rates in

    E-Print Network [OSTI]

    , of the Department of Energy Genomes to Life project: Carbon Sequestration in Synechococcus sp.: From Molecular. A specific challenge for this project is to integrate the biotic molecular mechanism of carbon sequestration in the marine cyanobacterium Synechococcus to the abiotic process of carbon cycling and ecosystem dynamics

  2. Collective excitations in low dimensional systems and stochastic control of population growth in a fluctuating environment

    E-Print Network [OSTI]

    Xia, Xiang, Ph. D. Massachusetts Institute of Technology

    2007-01-01

    In this thesis, I study several problems in the following areas: collective excitations in condensed matter physics, noise in gene network and stochastic control in biophysics. In the first area, I construct an effective ...

  3. Risk Analysis for Water Resources Under Climate Change, Population Growth, and Land Use Change

    E-Print Network [OSTI]

    Kiparsky, Michael

    2010-01-01

    for California." Climatic Change 76(3-4): 361-387. Thompsonrisk assessments." Climatic Change 89(3): 371-394. Brekke,small forecast ensembles." Climatic Change 76(1-2): 149-168.

  4. Salix exigua clonal growth and population dynamics in relation to disturbance regime variation

    E-Print Network [OSTI]

    Douhovnikoff, V; McBride, J R; Dodd, R S

    2005-01-01

    of clones: application to Salix exigua . Theoretical andcolonization and coexistence of Salix spp. in a seasonally ?of arroyo willow ( Salix lasiolepis : Salicaceae). American

  5. Building Design for Moderate Seismic Regions Peter J. Cheever, LeMessurier Consultants, Cambridge, MA, pcheever@lemessurier.com

    E-Print Network [OSTI]

    Hines, Eric

    Building Design for Moderate Seismic Regions Authors: Peter J. Cheever, LeMessurier Consultants which result in most buildings being designed for Seismic Design Category C, including special seismic detailing consistent with the 1992 AISC Seismic Provisions. Spectral design acceleration values

  6. Distinct osmo-sensing protein kinase pathways are involved in signalling moderate and severe hyper-osmotic

    E-Print Network [OSTI]

    Hirt, Heribert

    Distinct osmo-sensing protein kinase pathways are involved in signalling moderate and severe hyper-osmotic is severely affected by hyper-osmotic salt conditions. Although a number of salt-induced genes have been and extreme hyper-osmotic conditions. A 46 kDa protein kinase was found to be activated by elevated salt

  7. List of Refereed Journal Publications 1. On the Existence of Moderate-Density-Burst Codes, Journal of Mathematical Sciences, Vol.

    E-Print Network [OSTI]

    Saidak, Filip

    List of Refereed Journal Publications 1. On the Existence of Moderate-Density-Burst Codes, Journal of Mathematical Sciences, Vol. 10, 8-12, 1975. 2. On UEP Burst Codes, Journal of Mathematical Sciences, Vol. 10, 21-27, 1975. 3. Linear Codes having a Sub-block Structure, Journal of Cybernetics, Vol. 6, 263

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

    E-Print Network [OSTI]

    Yosef E. Maruvka; Nadav M. Shnerb

    2005-06-22

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

  9. Minor actinide transmutation in thorium and uranium matrices in heavy water moderated reactors

    SciTech Connect (OSTI)

    Bhatti, Zaki; Hyland, B.; Edwards, G.W.R. [Atomic Energy of Canada Limited, Chalk River Laboratories, 1 Plant Road, Chalk River, Ontario, K0J 1J0 (Canada)

    2013-07-01

    The irradiation of Th{sup 232} breeds fewer of the problematic minor actinides (Np, Am, Cm) than the irradiation of U{sup 238}. This characteristic makes thorium an attractive potential matrix for the transmutation of these minor actinides, as these species can be transmuted without the creation of new actinides as is the case with a uranium fuel matrix. Minor actinides are the main contributors to long term decay heat and radiotoxicity of spent fuel, so reducing their concentration can greatly increase the capacity of a long term deep geological repository. Mixing minor actinides with thorium, three times more common in the Earth's crust than natural uranium, has the additional advantage of improving the sustainability of the fuel cycle. In this work, lattice cell calculations have been performed to determine the results of transmuting minor actinides from light water reactor spent fuel in a thorium matrix. 15-year-cooled group-extracted transuranic elements (Np, Pu, Am, Cm) from light water reactor (LWR) spent fuel were used as the fissile component in a thorium-based fuel in a heavy water moderated reactor (HWR). The minor actinide (MA) transmutation rates, spent fuel activity, decay heat and radiotoxicity, are compared with those obtained when the MA were mixed instead with natural uranium and taken to the same burnup. Each bundle contained a central pin containing a burnable neutron absorber whose initial concentration was adjusted to have the same reactivity response (in units of the delayed neutron fraction ?) for coolant voiding as standard NU fuel. (authors)

  10. Synchronization and phase redistribution in self-replicating populations of coupled oscillators and excitable elements

    E-Print Network [OSTI]

    Wen Yu; Kevin B. Wood

    2015-03-19

    We study the dynamics of phase synchronization in growing populations of discrete phase oscillatory systems when the division process is coupled to the distribution of oscillator phases. Using mean field theory, linear stability analysis, and numerical simulations, we demonstrate that coupling between population growth and synchrony can lead to a wide range of dynamical behavior, including extinction of synchronized oscillations, the emergence of asynchronous states with unequal state (phase) distributions, bistability between oscillatory and asynchronous states or between two asynchronous states, a switch between continuous (supercritical) and discontinuous (subcritical) transitions, and modulation of the frequency of bulk oscillations.

  11. 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.

  12. 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.

  13. 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

  14. Biomass production, forage quality, and cation uptake of Quail bush, four-wing saltbush, and seaside barley irrigated with moderately saline-sodic water

    SciTech Connect (OSTI)

    Bauder, J.W.; Browning, L.S.; Phelps, S.D.; Kirkpatrick, A.D. [Montana State University, Bozeman, MT (United States)

    2008-07-01

    The study reported here investigated capacity of Atriplex lentiformis (Torr.) S. Wats. (Quail bush), Atriplex X aptera A. Nels. (pro sp.) (Wytana four-wing saltbush), and Hordeum marinum Huds. (seaside barley) to produce biomass and crude protein and take up cations when irrigated with moderately saline-sodic water, in the presence of a shallow water table. Water tables were established at 0.38, 0.76, and 1.14m below the surface in sand-filled columns. The columns were then planted to the study species. Study plants were irrigated for 224 days; irrigation water was supplied every 7 days equal to water lost to evapotranspiration (ET) plus 100mL (the volume of water removed in the most previous soil solution sampling). Water representing one of two irrigation sources was used: Powder River (PR) or coalbed natural gas (CBNG) wastewater. Biomass production did not differ significantly between water quality treatments but did differ significantly among species and water table depth within species. Averaged across water quality treatments, Hordeum marinum produced 79% more biomass than A. lentiformis and 122% more biomass than Atriplex X aptera, but contained only 11% crude protein compared to 16% crude protein in A. lentiformis and 14% crude protein in Atriplex X aptera. Atriplex spp. grown in columns with the water table at 0.38m depth produced more biomass, took up less calcium on a percentage basis, and took up more sodium on a percentage basis than when grown with the water table at a deeper depth. Uptake of cations by Atriplex lentiformis was approximately twice the uptake of cations by Atriplex X aptera and three times that of H. marinum. After 224 days of irrigation, crop growth, and cation uptake, followed by biomass harvest, EC and SAR of shallow groundwater in columns planted to A. lentiformis were less than EC and SAR of shallow ground water in columns planted to either of the other species.

  15. Growth of asteroids, planetary embryos and Kuiper belt objects by chondrule accretion

    E-Print Network [OSTI]

    Johansen, Anders; Lacerda, Pedro; Bizzarro, Martin

    2015-01-01

    Chondrules are millimeter-sized spherules that dominate primitive meteorites (chondrites) originating from the asteroid belt. The incorporation of chondrules into asteroidal bodies must be an important step in planet formation, but the mechanism is not understood. We show that the main growth of asteroids can result from gas-drag-assisted accretion of chondrules. The largest planetesimals of a population with a characteristic radius of 100 km undergo run-away accretion of chondrules within ~3 Myr, forming planetary embryos up to Mars sizes along with smaller asteroids whose size distribution matches that of main belt asteroids. The aerodynamical accretion leads to size-sorting of chondrules consistent with chondrites. Accretion of mm-sized chondrules and ice particles drives the growth of planetesimals beyond the ice line as well, but the growth time increases above the disk life time outside of 25 AU. The contribution of direct planetesimal accretion to the growth of both asteroids and Kuiper belt objects is...

  16. Kinematic signatures of AGN feedback in moderately powerful radio galaxies at z~2 observed with SINFONI

    E-Print Network [OSTI]

    Collet, C; De Breuck, C; Lehnert, M D; Best, P; Bryant, J J; Hunstead, R; Dicken, D; Johnston, H

    2015-01-01

    Most successful galaxy formation scenarios now postulate that the intense star formation in massive, high-redshift galaxies during their major growth period was truncated when powerful AGNs launched galaxy-wide outflows of gas that removed large parts of the interstellar medium. The most powerful radio galaxies at z~2 show clear signatures of such winds, but are too rare to be good representatives of a generic phase in the evolution of all massive galaxies at high redshift. Here we present SINFONI imaging spectroscopy of 12 radio galaxies at z~2 that are intermediate between the most powerful radio and vigorous starburst galaxies in radio power, and common enough to represent a generic phase in the early evolution of massive galaxies. The kinematic properties are diverse, with regular velocity gradients with amplitudes of Delta v=200-400 km s^-1 as in rotating disks as well as irregular kinematics with multiple velocity jumps of a few 100 km s^-1. Line widths are generally high, typically around FWHM=800 km s...

  17. 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.

  18. 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...

  19. 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."

  20. Fish Population and Behavior Revealed by Instantaneous

    E-Print Network [OSTI]

    Fish Population and Behavior Revealed by Instantaneous Continental Shelf­Scale Imaging Nicholas C-transect methods from slow-moving research vessels. These methods significantly undersample fish populations in time and space, leaving an incomplete and ambiguous record of abundance and behavior. We show that fish

  1. Populations of Galaxies Building a Galaxy

    E-Print Network [OSTI]

    Crenshaw, Michael

    hydrogen fusion), M > 100M! (star's radiation pressure exceeds gravity) (M) M Salpeter (1955) = 2.35 Total-Luminosity Relations · Initial Mass Function · Star Formation Rates · Heavy Element Enrichment · Evolution spectrum and determine predicted colors for a population of stars? · Start a population with an initial

  2. Population density of San Joaquin kit fox

    SciTech Connect (OSTI)

    McCue, P.; O'Farrell, T.P.; Kato, T.; Evans, B.G.

    1982-01-01

    Populations of the endangered San Joaquin kit fox, vulpes macrotis mutica, are known to occur on the Elk Hills Naval Petroleum Reserve No. 1. This study assess the impact of intensified petroleum exploration and production and associated human activities on kit fox population density. (ACR)

  3. Population genomics20-02-2009 Antnio Rodrigues; Bruno Santos / 59 Population Genomics

    E-Print Network [OSTI]

    Goldschmidt, Christina

    Population genomics20-02-2009 António Rodrigues; Bruno Santos / 59 Population Genomics 1 António Rodrigues (PDBC 2008) Bruno Santos (PDBC 2008) #12;Population genomics20-02-2009 António Rodrigues; Bruno Santos / 59 Contents 2 2 1000 genome project 1 Motivation and Introduction New generation sequencing

  4. 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

  5. The formation of massive primordial stars in the presence of moderate UV backgrounds

    SciTech Connect (OSTI)

    Latif, M. A.; Schleicher, D. R. G.; Bovino, S. [Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, D-37077 Göttingen (Germany); Grassi, T. [Centre for Star and Planet Formation, Natural History Museum of Denmark, Øster Voldgade 5-7, DK-1350 Copenhagen (Denmark); Spaans, M., E-mail: mlatif@astro.physik.uni-goettingen.de [Kapteyn Astronomical Institute, University of Groningen, 9700-AV Groningen (Netherlands)

    2014-09-01

    Radiative feedback produced by stellar populations played a vital role in early structure formation. In particular, photons below the Lyman limit can escape the star-forming regions and produce a background ultraviolet (UV) flux, which consequently may influence the pristine halos far away from the radiation sources. These photons can quench the formation of molecular hydrogen by photodetachment of H{sup –}. In this study, we explore the impact of such UV radiation on fragmentation in massive primordial halos of a few times 10{sup 7} M {sub ?}. To accomplish this goal, we perform high resolution cosmological simulations for two distinct halos and vary the strength of the impinging background UV field in units of J {sub 21} assuming a blackbody radiation spectrum with a characteristic temperature of T {sub rad} = 10{sup 4} K. We further make use of sink particles to follow the evolution for 10,000 yr after reaching the maximum refinement level. No vigorous fragmentation is observed in UV-illuminated halos while the accretion rate changes according to the thermal properties. Our findings show that a few 10{sup 2}-10{sup 4} solar mass protostars are formed when halos are irradiated by J {sub 21} = 10-500 at z > 10 and suggest a strong relation between the strength of the UV flux and mass of a protostar. This mode of star formation is quite different from minihalos, as higher accretion rates of about 0.01-0.1 M {sub ?} yr{sup –1} are observed by the end of our simulations. The resulting massive stars are potential cradles for the formation of intermediate-mass black holes at earlier cosmic times and contribute to the formation of a global X-ray background.

  6. 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

  7. 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...

  8. 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

  9. Energy Systems and Population Health

    SciTech Connect (OSTI)

    Ezzati, Majid; Bailis, Rob; Kammen, Daniel M.; Holloway, Tracey; Price, Lynn; Cifuentes, Luis A.; Barnes, Brendon; Chaurey, Akanksha; Dhanapala, Kiran N.

    2004-04-12

    It is well-documented that energy and energy systems have a central role in social and economic development and human welfare at all scales, from household and community to regional and national (41). Among its various welfare effects, energy is closely linked with people s health. Some of the effects of energy on health and welfare are direct. With abundant energy, more food or more frequent meals can be prepared; food can be refrigerated, increasing the types of food items that are consumed and reducing food contamination; water pumps can provide more water and eliminate the need for water storage leading to contamination or increased exposure to disease vectors such as mosquitoes or snails; water can be disinfected by boiling or using other technologies such as radiation. Other effects of energy on public health are mediated through more proximal determinants of health and disease. Abundant energy can lead to increased irrigation, agricultural productivity, and access to food and nutrition; access to energy can also increase small-scale income generation such as processing of agricultural commodities (e.g., producing refined oil from oil seeds, roasting coffee, drying and preserving fruits and meats) and production of crafts; ability to control lighting and heating allows education or economic activities to be shielded from daily or seasonal environmental constraints such as light, temperature, rainfall, or wind; time and other economic resources spent on collecting and/or transporting fuels can be used for other household needs if access to energy is facilitated; energy availability for transportation increases access to health and education facilities and allow increased economic activity by facilitating the transportation of goods and services to and from markets; energy for telecommunication technology (radio, television, telephone, or internet) provides increased access to information useful for health, education, or economic purposes; provision of energy to rural and urban health facilities allows increased delivery and coverage of 3 various health services and interventions such as tests and treatments, better storage of medicine and vaccines, disinfection of medical equipment by boiling or radiation, and more frequent and efficient health system encounters through mobile clinics or longer working hours; and so on. In fact, while the dominant view of development-energy-health linkages has been that improvements in energy and health are outcomes of the socioeconomic development process (e.g., the ''energy ladder'' framework discussed below), it has even been argued that access to higher quality energy sources and technologies can initiate a chain of demographic, health, and development outcomes by changing the household structure and socioeconomic relationships. For example, in addition to increased opportunities for food and income production, reduced infant mortality as a result of transition to cleaner fuels or increased coverage of vaccination with availability of refrigerators in rural clinics may initiate a process of ''demographic transition'' to low-mortality and low-fertility populations (14). Such a transition has historically been followed with further improvements in maternal and child health and increased female participation in the labor markets and other economic activities.

  10. Predictors of change differ for moderate and vigorous intensity physical activity and for weekdays and weekends: a longitudinal analysis

    E-Print Network [OSTI]

    Corder, Kirsten; Craggs, Christopher; Jones, Andrew P; Ekelund, Ulf; Griffin, Simon J; van Sluijs, Esther MF

    2013-05-28

    Sport 2002, 73:206–210.38. Panter JR, Jones AP, Van Sluijs EM, Griffin SJ: Neighborhood, route, and school environments and children’s active commuting. Am J Prev Med 2010, 38:268–278.47. Kahn JA, Huang B, Gillman MW, Field AE, Austin SB, Colditz GA... BioMed Central Commons Attribution License (http://creativec reproduction in any medium, provided the orOpen Access r for moderate and l activity and for a longitudinal analysis , Ulf Ekelund2,4, Simon J Griffin1,2Ltd. This is an Open Access article...

  11. Estimating Traveler Populations at Airport and Cruise Terminals for Population Distribution and Dynamics

    SciTech Connect (OSTI)

    Jochem, Warren C; Sims, Kelly M; Bright, Eddie A; Urban, Marie L; Rose, Amy N; Coleman, Phil R; Bhaduri, Budhendra L

    2013-01-01

    In recent years, uses of high-resolution population distribution databases are increasing steadily for environmental, socioeconomic, public health, and disaster-related research and operations. With the development of daytime population distribution, temporal resolution of such databases has been improved. However, the lack of incorporation of transitional population, namely business and leisure travelers, leaves a significant population unaccounted for within the critical infrastructure networks, such as at transportation hubs. This paper presents two general methodologies for estimating passenger populations in airport and cruise port terminals at a high temporal resolution which can be incorporated into existing population distribution models. The methodologies are geographically scalable and are based on, and demonstrate how, two different transportation hubs with disparate temporal population dynamics can be modeled utilizing publicly available databases including novel data sources of flight activity from the Internet which are updated in near-real time. The airport population estimation model shows great potential for rapid implementation for a large collection of airports on a national scale, and the results suggest reasonable accuracy in the estimated passenger traffic. By incorporating population dynamics at high temporal resolutions into population distribution models, we hope to improve the estimates of populations exposed to or at risk to disasters, thereby improving emergency planning and response, and leading to more informed policy decisions.

  12. A Decade of Population Change in Texas. 

    E-Print Network [OSTI]

    Skrabanek, R. L.

    1963-01-01

    .4 36.4 27.8 19.7 24.9 10.1 20.2 24.2 Source: U.S. Bureau of Census, PC (1) 45A-Texas, Table 1. only three states, California, Florida and New York. The state had 5.1 percent of the nation's people in 1950 and 5.3 percent in 1960. Texas ranks... sixth in comparison with other states in total population, the same position it held in 1950. States having larger population in 1960 were New York, California, Pennsylvania, Illinois and Ohio. Population Density Although Texas ranks sixth in total...

  13. Accounting for population variation in targeted proteomics

    SciTech Connect (OSTI)

    Fujimoto, Grant M.; Monroe, Matthew E.; Rodriguez, Larissa M.; Wu, Chaochao; MacLean, Brendan; Smith, Richard D.; MacCoss, Michael; Payne, Samuel H.

    2014-01-03

    Individual proteomes typically differ from the reference human proteome at ~10,000 single amino acid variants. When viewed at the population scale, this individual variation results in a wide variety of protein sequences. In targeted proteomics experiments, such variability would confound accurate protein quantification. To facilitate researchers in identifying target peptides with high variability within the human population we have created the Population Variation plug-in for Skyline, which provides easy access to the polymorphisms stored in dbSNP. Given a set of peptides, the tool reports minor allele frequency for common polymorphisms. We highlight the importance of considering genetic variation by applying the tool to public datasets.

  14. Hanford Site Regional Population - 2010 Census

    SciTech Connect (OSTI)

    Hamilton, Erin L.; Snyder, Sandra F.

    2011-08-12

    The U.S. Department of Energy conducts radiological operations in south-central Washington State. Population dose estimates must be performed to provide a measure of the impact from site radiological releases. Results of the U.S. 2010 Census were used to determine counts and distributions for the residential population located within 50-miles of several operating areas of the Hanford Site. Year 2010 was the first census year that a 50-mile population of a Hanford Site operational area exceeded the half-million mark.

  15. 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

  16. Population viability analysis of the Endangered shortnose sturgeon

    SciTech Connect (OSTI)

    Jager, Yetta; Bevelhimer, Mark S; Peterson, Douglas L.

    2011-07-01

    This study used population viability analysis (PVA) to partition the influences of potential threats to the endangered shortnose sturgeon (Acipenser brevirostrum). A workshop brought together experts to help identify potential threats including groundwater withdrawal, poor water quality, saltwater intrusion, mercury effects, harvest as by-catch, and sedimentation of spawning habitat. During the course of the project, we eliminated some threats and added new ones. Groundwater withdrawal was dismissed after a study failed to identify connection with groundwater and the majority of pumping is from a confined aquifer. We also eliminated activities on Fort Stewart as influences on spawning habitat because any successful spawning must occur upstream of Fort Stewart. We added climate change to the list of threats based on our assessment of temperature effects and expectations of sea-level rise. Our study highlighted the role of populations in nearby rivers in providing metapopulation support, raising the concern that the population in the Ogeechee River acts as a demographic sink. As part of this study, we carried out a field sampling study to analyze effects of training activities on headwater streams. We developed a new methodology for sampling design as part of this effort and used a mixed-modeling approach to identify relationships between land cover-land use, including those associated with military training activity and water quality. We found that tank training was associated with higher suspended sediment and equipment training was associated with higher organic carbon) and water quality. We detected effects of training on suspended sediment and organic carbon. We also carried out a field sampling effort in the Canoochee and Ogeechee Rivers. In the Ogeechee River, we found that dissolved oxygen in 40% of measurements during summer were below 4 mg L-1. To evaluate mercury as a potential threat, we developed a mercury uptake model and analyzed mercury levels in amphipod prey and sturgeon eggs. These did not exceed EPA guidelines. Finally, we developed a PVA model that including linkages between shortnose sturgeon growth, reproduction, and survival and each remaining threat; All three had significant influences. Preliminary simulations suggest that elevated temperatures under future climate will extirpate this population and add support to the hypothesis that this species requires access to spawning habitat far upstream to persist.

  17. Moderation of effects of AAC based on setting and types of aided AAC on outcome variables: An aggregate study of single-case research with individuals with ASD 

    E-Print Network [OSTI]

    Ganz, Jennifer B.; Rispoli, Mandy J.; Mason, Rose A.; Hong, Ee Rea

    2014-01-01

    Objective: The purpose of this meta-analysis was to evaluate the potential moderating effects of intervention setting and type of aided AAC on outcome variables for students with autism spectrum disorders. Methods: ...

  18. Population Characteristics and Seasonal Movement Patterns of the Rattlesnake Hills Elk Herd - Status Report 2000

    SciTech Connect (OSTI)

    Tiller, B.L.; Zufelt, R.K.; Turner, S.; Cadwell, L.L.; Bender, L.; Turner, G.K.

    2000-10-10

    Population characteristics of the Rattlesnake Hills elk herd indicate reduced herd growth rates from the 1980s compared to the 1990s (McCorquodale 1988; Eberhardt 1996). However, the population continued to grow approximately 25% annually through the 1990s, reaching a high of 838 animals in summer 1999. Calf recruitment rates appear to be cyclic and are likely related to reduced calf survival during the first weeks of life; however, late-term abortions may also have occurred. The cause(s) could be predator-related and/or a function of shifts in nutritional condition (age-class distributions, assuming older-age cows are less likely to recruit calves, major climate shifts) or changes in the human-related disturbances during gestation, and/or calf rearing periods. In fall 1999 and spring 2000, the population was reduced from 838 individuals to 660 individuals. The primary controlling factors were modified hunting seasons on private and state lands and the large-scale roundup conducted in spring 2000. Continued removal of animals (particularly females) within the population will be pivotal to maintain the population at a level that minimizes land damage complaints, animal-vehicle collisions, use of central Hanford areas, and deterioration of natural resources.

  19. Conditions when hybridization might predispose populations

    E-Print Network [OSTI]

    COMMENTARY Conditions when hybridization might predispose populations for adaptive radiation O (Sch- warzer et al., 2012), perhaps just as a consequence of many young species in geographical et al., 2011; Genner & Turner, 2012). Whether these species radiations happen despite hybridization

  20. The Population Structure of Ten Newfoundland Outports

    E-Print Network [OSTI]

    Martin, L. J.; Crawford, Michael H.; Koertvelyessy, T. A.; Keeping, D.; Collins, M.; Huntsman, R.

    2000-12-01

    mean per-locus heterozygosity on genetic distance from the gene frequency centroid to identify the most isolated populations. On the basis of this information, the three outports of Seal Cove, Island Harbor, and Tilting were found to be genetically...

  1. ORIGINAL PAPER Morphological differentiation among populations

    E-Print Network [OSTI]

    Langerhans, Brian

    vertebral column). We investigated inter-population variation in survival rate, abundance of predators presacral vertebral column, and narrower head in sites with increased abundance of spiders and snakes

  2. Neoclassical formulations of optimum population theory 

    E-Print Network [OSTI]

    Davis, Glenn Anthony

    1971-01-01

    population concept and concludes wi. th an analysis of its modern-day version. There is widespread belief that this concept msy have originated from the so-called ulawu of secular diminishing returns as formulated by Ricardo and West. However... on the other, would be inadequate. D. P. Mukerji has noted that the development of economic thought contained within itself a motive power for the drive towards the optimum [25, 155]. Rudiments of the ides of optimum population have been detected...

  3. A parallel algorithm for step- and chain-growth polymerization in Molecular Dynamics

    E-Print Network [OSTI]

    Pierre de Buyl; Erik Nies

    2015-03-03

    Classical Molecular Dynamics (MD) simulations provide insight on the properties of many soft-matter systems. In some situations it is interesting to model the creation of chemical bonds, a process that is not part of the MD framework. In this context, we propose a parallel algorithm for step- and chain-growth polymerization that is based on a generic reaction scheme, works at a given intrinsic rate and produces continuous trajectories. We present an implementation in the ESPResSo++ simulation software and compare it with the corresponding feature in LAMMPS. For chain growth, our results are compared to the existing simulation literature. For step growth, a rate equation is proposed for the evolution of the crosslinker population that compares well to the simulations for low crosslinker functionality or for short times.

  4. 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.

  5. 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...

  6. 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.

  7. 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.

  8. 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.

  9. 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.

  10. 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

  11. "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...

  12. 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

  13. 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. ”

  14. Moderate extracellular acidification inhibits capsaicin-induced cell death through regulating calcium mobilization, NF-{kappa}B translocation and ROS production in synoviocytes

    SciTech Connect (OSTI)

    Hu, Fen; Yang, Shuang; Zhao, Dan; Zhu, Shuyan; Wang, Yuxiang; Li, Junying

    2012-07-20

    Highlights: Black-Right-Pointing-Pointer Moderate extracellular acidification regulates intracellular Ca{sup 2+} mobilization. Black-Right-Pointing-Pointer Moderate acidification activates NF-{kappa}B nuclear translocation in synoviocytes. Black-Right-Pointing-Pointer Moderate acidification depresses the ROS production induced by capsaicin. Black-Right-Pointing-Pointer Moderate acidification inhibits capsaicin-caused synoviocyte death. -- Abstract: We previously show the expression of transient receptor potential vanilloid 1 (TRPV1) in primary synoviocytes from collagen-induced arthritis (CIA) rats. Capsaicin and lowered extracellular pH from 7.4 to 5.5 induce cell death through TRPV1-mediated Ca{sup 2+} entry and reactive oxygen species (ROS) production. However, under the pathological condition in rheumatoid arthritis, the synovial fluid is acidified to a moderate level (about pH 6.8). In the present study, we examined the effects of pH 6.8 on the TRPV1-mediated cell death. Our finding is different or even opposite from what was observed at pH 5.5. We found that the moderate extracellular acidification (from pH 7.4 to 6.8) inhibited the capsaicin-induced Ca{sup 2+} entry through attenuating the activity of TRPV1. In the mean time, it triggered a phospholipse C (PLC)-related Ca{sup 2+} release from intracellular stores. The nuclear translocation of NF-{kappa}B was found at pH 6.8, and this also depends on PLC activation. Moreover, the capsaicin-evoked massive ROS production and cell death were depressed at pH 6.8, both of which are dependent on the activation of PLC and NF-{kappa}B. Taken together, these results suggested that the moderate extracellular acidification inhibited the capsaicin-induced synoviocyte death through regulating Ca{sup 2+} mobilization, activating NF-{kappa}B nuclear translocation and depressing ROS production.

  15. Environmental Impacts of Wind Power Development on the Population...

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

    Environmental Impacts of Wind Power Development on the Population Biology of Greater Prairie-Chickens Environmental Impacts of Wind Power Development on the Population Biology of...

  16. Fact #661: February 7, 2011 Population Density | Department of...

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

    states, the population is generally less dense, with the exceptions being California, Hawaii, and Washington. Every state except Michigan experienced increased population density...

  17. How should environmental stress affect the population dynamics of disease?

    E-Print Network [OSTI]

    Holt, Robert D.

    in pollution (Khan 1990), malnutrition (Beck & Levander 2000) and thermal stress from climate change (Harvell and disease in natural populations. Keywords Disease, dynamics, host, infectious, model, pollution, population

  18. Peanuts at an Angle: Detecting and Measuring the Three-Dimensional Structure of Bars in Moderately Inclined Galaxies

    E-Print Network [OSTI]

    Erwin, Peter

    2013-01-01

    We show that direct detection and measurement of the vertically thickened parts of bars (so-called "boxy" or "peanut-shaped" bulges) is possible not only for edge-on galaxies but also for galaxies with moderate inclinations (i peanut can usually be detected for inclinations as low as i ~ 40 deg -- and in exceptional cases down to i ~ 30 deg. In agreement with the predictions from N-body simulations, the signature is most easily detectable when the bar's position angle is within ~ 50 deg of the galaxy major axis; in particular, galaxies where the bar lies very close to the minor axis do not show the signature clearly or at all. For galaxies with i = 40--65 deg and relative angles peanut struc...

  19. Improving macromolecular atomic models at moderate resolution by automated iterative model building, statistical density modification and refinement

    SciTech Connect (OSTI)

    Terwilliger, Thomas C., E-mail: terwilliger@lanl.gov [Mail Stop M888, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

    2003-07-01

    A procedure for iterative model-building, statistical density modification and refinement at moderate resolution (up to about 2.8 Å) is described. An iterative process for improving the completeness and quality of atomic models automatically built at moderate resolution (up to about 2.8 Å) is described. The process consists of cycles of model building interspersed with cycles of refinement and combining phase information from the model with experimental phase information (if any) using statistical density modification. The process can lead to substantial improvements in both the accuracy and completeness of the model compared with a single cycle of model building. For eight test cases solved by MAD or SAD at resolutions ranging from 2.0 to 2.8 Å, the fraction of models built and assigned to sequence was 46–91% (mean of 65%) after the first cycle of building and refinement, and 78-95% (mean of 87%) after 20 cycles. In an additional test case, an incorrect model of gene 5 protein (PDB code 2gn5; r.m.s.d. of main-chain atoms from the more recent refined structure 1vqb at 1.56 Å) was rebuilt using only structure-factor amplitude information at varying resolutions from 2.0 to 3.0 Å. Rebuilding was effective at resolutions up to about 2.5 Å. The resulting models had 60-80% of the residues built and an r.m.s.d. of main-chain atoms from the refined structure of 0.20 to 0.62 Å. The algorithm is useful for building preliminary models of macromolecules suitable for an experienced crystallographer to extend, correct and fully refine.

  20. MOLYBDENUM, RUTHENIUM, AND THE HEAVY r-PROCESS ELEMENTS IN MODERATELY METAL-POOR MAIN-SEQUENCE TURNOFF STARS

    SciTech Connect (OSTI)

    Peterson, Ruth C. [Astrophysical Advances, 607 Marion Place, Palo Alto, CA 94301 (United States)

    2013-05-01

    The ratios of elemental abundances observed in metal-poor stars of the Galactic halo provide a unique present-day record of the nucleosynthesis products of its earliest stars. While the heaviest elements were synthesized by the r- and s-processes, dominant production mechanisms of light trans-ironic elements were obscure until recently. This work investigates further our 2011 conclusion that the low-entropy regime of a high-entropy wind (HEW) produced molybdenum and ruthenium in two moderately metal-poor turnoff stars that showed extreme overabundances of those elements with respect to iron. Only a few, rare nucleosynthesis events may have been involved. Here we determine abundances for Mo, Ru, and other trans-Fe elements for 28 similar stars by matching spectral calculations to well-exposed near-UV Keck HIRES spectra obtained for beryllium abundances. In each of the 26 turnoff stars with Mo or Ru line detections and no evidence for s-process production (therefore old), we find Mo and Ru to be three to six times overabundant. In contrast, the maximum overabundance is reduced to factors of three and two for the neighboring elements zirconium and palladium. Since the overproduction peaks sharply at Mo and Ru, a low-entropy HEW is confirmed as its origin. The overabundance level of the heavy r-process elements varies significantly, from none to a factor of four, but is uncorrelated with Mo and Ru overabundances. Despite their moderate metallicity, stars in this group trace the products of different nucleosynthetic events: possibly very few events, possibly events whose output depended on environment, metallicity, or time.

  1. Population dynamics of the Concho water snake 

    E-Print Network [OSTI]

    Mueller, James Michael

    1990-01-01

    Recruitment B. SE Capture Probability SE 15 Sep 1987 8 Oct 1987 23 Apr 1988 13 Aug 1988 22 May 1989 19 Jul 1989 14-16 Sep 6-19 Oct 13 Apr-4 May 31 Aug. 27 Sep 17 May-15 Jun 29 Jun-9 Aug 21. 0 15. 7 54. 7 48. 1 15 0 e*** 2/ 0 **** **** ee*e... **a*** Table 12. Jolly-Saber estimates and standard errors for the 1988 sge class of e Concho water snake population st Egan Dairy on the Colorado River, Texas. Population Size Survival Probability Recruitment Capture Probability 31 Aug 1988...

  2. 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

  3. 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

  4. 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

  5. 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...

  6. 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

  7. 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

  8. 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

  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. Pair instability supernovae of very massive population III stars

    SciTech Connect (OSTI)

    Chen, Ke-Jung; Woosley, Stan [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Heger, Alexander [Monash Centre for Astrophysics, Monash University, Victoria 3800 (Australia); Almgren, Ann [Center for Computational Sciences and Engineering, Lawrence Berkeley National Lab, Berkeley, CA 94720 (United States); Whalen, Daniel J., E-mail: kchen@ucolick.org [T-2, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

    2014-09-01

    Numerical studies of primordial star formation suggest that the first stars in the universe may have been very massive. Stellar models indicate that non-rotating Population III stars with initial masses of 140-260 M {sub ?} die as highly energetic pair-instability supernovae. We present new two-dimensional simulations of primordial pair-instability supernovae done with the CASTRO code. Our simulations begin at earlier times than previous multidimensional models, at the onset of core contraction, to capture any dynamical instabilities that may be seeded by core contraction and explosive burning. Such instabilities could enhance explosive yields by mixing hot ash with fuel, thereby accelerating nuclear burning, and affect the spectra of the supernova by dredging up heavy elements from greater depths in the star at early times. Our grid of models includes both blue supergiants and red supergiants over the range in progenitor mass expected for these events. We find that fluid instabilities driven by oxygen and helium burning arise at the upper and lower boundaries of the oxygen shell ?20-100 s after core bounce. Instabilities driven by burning freeze out after the SN shock exits the helium core. As the shock later propagates through the hydrogen envelope, a strong reverse shock forms that drives the growth of Rayleigh-Taylor instabilities. In red supergiant progenitors, the amplitudes of these instabilities are sufficient to mix the supernova ejecta.

  12. Contributed Paper Population Consequences of Environmental Sex

    E-Print Network [OSTI]

    Cotton, Sam

    population sizes considerably. This may limit any evolutionary response to the deleterious effects of ESR sexuales y el crecimiento y persistencia de la poblaci´on despu´es de la exposici´on a fuerzas ambientales feminizaci´on moderada fue ben´efica para el crecimiento poblacional en la ausencia de efectos notables sobre

  13. Competitive niche: Way of population regulation

    E-Print Network [OSTI]

    Meszéna, Géza

    1 / 27 Competitive niche: Way of population regulation G´eza Mesz´ena1, Andr´as Szil´agyi1, Kalle of coexistence Theory Regulating loop Results Examples Spatial segregation Functional & spatial segregation Regulating loop y Results Examples Conclusions 7 / 27 #12;Regulating loop Introduction Theory y Regulating

  14. Population genetic analyses suggest that the Eucalyptus

    E-Print Network [OSTI]

    Population genetic analyses suggest that the Eucalyptus fungal pathogen Ceratocystis fimbriata has , Brenda D. Wingfield a , Gilbert N. Kamgan b and Michael J. Wingfield a Introduction Eucalyptus species, with Eucalyptus comprising about 40% of the total area.3 This is an important crop that sustains large pulp, sawn

  15. Stoichiometry and population dynamics Tom Andersen,1

    E-Print Network [OSTI]

    Elser, Jim

    development, theoretical population biology has built on variants of the Lotka­Volterra equations stable states under stoichiometric constraints, for negative effects of solar radiation on herbivores via), dealing with the balance of energy and chemical elements in ecological interactions and especially

  16. Population Composition of an Exploited Hawaiian Fishery 

    E-Print Network [OSTI]

    Cockett, Patricia Malamalama

    2015-05-26

    the islands of Nihoa, Kaua‘i, Maui, O‘ahu, and Hawai‘i to test for relationships between genetic diversity, population size, island age, and harvest pressure. Global estimates of genetic differentiation among islands are greater than those estimated with mt...

  17. Structure of the Archaeoglobus fulgidus orphan ORF AF1382 determined by sulfur SAD from a moderately diffracting crystal

    SciTech Connect (OSTI)

    Zhu, Jin-Yi; Fu, Zheng-Qing; Chen, Lirong; Xu, Hao; Chrzas, John; Rose, John Wang, Bi-Cheng

    2012-09-01

    The crystal structure of the 11.14 kDa orphan ORF 1382 from Archaeoglobus fulgidus (AF1382) has been determined by sulfur SAD phasing using data collected from a moderately diffracting crystal and 1.9 Å synchrotron X-rays. The crystal structure of the 11.14 kDa orphan ORF 1382 from Archaeoglobus fulgidus (AF1382) has been determined by sulfur SAD phasing using a moderately diffracting crystal and 1.9 Å wavelength synchrotron X-rays. AF1382 was selected as a structural genomics target by the Southeast Collaboratory for Structural Genomics (SECSG) since sequence analyses showed that it did not belong to the Pfam-A database and thus could represent a novel fold. The structure was determined by exploiting longer wavelength X-rays and data redundancy to increase the anomalous signal in the data. AF1382 is a 95-residue protein containing five S atoms associated with four methionine residues and a single cysteine residue that yields a calculated Bijvoet ratio (?F{sub anom}/F) of 1.39% for 1.9 Å wavelength X-rays. Coupled with an average Bijvoet redundancy of 25 (two 360° data sets), this produced an excellent electron-density map that allowed 69 of the 95 residues to be automatically fitted. The S-SAD model was then manually completed and refined (R = 23.2%, R{sub free} = 26.8%) to 2.3 Å resolution. High-resolution data were subsequently collected from a better diffracting crystal using 0.97 Å wavelength synchrotron X-rays and the S-SAD model was refined (R = 17.9%, R{sub free} = 21.4%) to 1.85 Å resolution. AF1382 has a winged-helix–turn–helix structure common to many DNA-binding proteins and most closely resembles the N-terminal domain (residues 1–82) of the Rio2 kinase from A. fulgidus, which has been shown to bind DNA, and a number of MarR-family transcriptional regulators, suggesting a similar DNA-binding function for AF1382. The analysis also points out the advantage gained from carrying out data reduction and structure determination on-site while the crystal is still available for further data collection.

  18. How do SNP ascertainment schemes and population demographics affect inferences about population history?

    E-Print Network [OSTI]

    McTavish, Emily Jane; Hills, David M.

    2015-03-17

    of population genetic parameters using empirical and simulated data representing the three major continental groups of cattle: European, African, and Indian. We simulated data under three demographic models. Each simulated data set was subjected to three...

  19. HLA Genes in the Chuvashian Population from European Russia: Admixture of Central European and Mediterranean Populations

    E-Print Network [OSTI]

    Arnaiz-Villena, Antonio; Martinez-Laso, Jorge; Moscoso, Juan; Livshits, Gregory; Zamora, Jorge; Gomez-Casado, Eduardo; Silvera-Redondo, Carlos; Melvin, Kristin L.; Crawford, Michael H.

    2003-06-01

    HLA alleles have been determined for the first time in individuals from the Chuvashian population by DNA typing and sequencing. HLA-A, -B, -DR, and -DQ allele frequencies and extended haplotypes have also been determined, ...

  20. The Genetic Structure of the Kuwaiti Population: mtDNA Inter- and Intra-population Variation

    E-Print Network [OSTI]

    Theyab, Jasem; Al-Bustan, Suzanne; Crawford, Michael H.

    2012-08-01

    it to their neighboring populations. These subpopulations were tested for genetic homogeneity and shown to be heterogeneous. Restriction fragment length polymorphism (RFLP) and mtDNA sequencing analyses of HVRI were used to reconstruct the genetic structure of Kuwait...

  1. 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...

  2. Emergent vortices in populations of colloidal rollers

    E-Print Network [OSTI]

    Antoine Bricard; Jean-Baptiste-Caussin; Debasish Das; Charles Savoie; Vijayakumar Chikkadi; Kyohei Shitara; Oleksandr Chepizhko; Fernando Peruani; David Saintillan; Denis Bartolo

    2015-06-26

    Coherent vortical motion has been reported in a wide variety of populations including living organisms (bacteria, fishes, human crowds) and synthetic active matter (shaken grains, mixtures of biopolymers), yet a unified description of the formation and structure of this pattern remains lacking. Here we report the self-organization of motile colloids into a macroscopic steadily rotating vortex. Combining physical experiments and numerical simulations, we elucidate this collective behavior. We demonstrate that the emergent-vortex structure lives on the verge of a phase separation, and single out the very constituents responsible for this state of polar active matter. Building on this observation, we establish a continuum theory and lay out a strong foundation for the description of vortical collective motion in a broad class of motile populations constrained by geometrical boundaries.

  3. Bacterial Population Genetics in a Forensic Context

    SciTech Connect (OSTI)

    Velsko, S P

    2009-11-02

    This report addresses the recent Department of Homeland Security (DHS) call for a Phase I study to (1) assess gaps in the forensically relevant knowledge about the population genetics of eight bacterial agents of concern, (2) formulate a technical roadmap to address those gaps, and (3) identify new bioinformatics tools that would be necessary to analyze and interpret population genetic data in a forensic context. The eight organisms that were studied are B. anthracis, Y. pestis, F. tularensis, Brucella spp., E. coli O157/H7, Burkholderia mallei, Burkholderia pseudomallei, and C. botulinum. Our study focused on the use of bacterial population genetics by forensic investigators to test hypotheses about the possible provenance of an agent that was used in a crime or act of terrorism. Just as human population genetics underpins the calculations of match probabilities for human DNA evidence, bacterial population genetics determines the level of support that microbial DNA evidence provides for or against certain well-defined hypotheses about the origins of an infecting strain. Our key findings are: (1) Bacterial population genetics is critical for answering certain types of questions in a probabilistic manner, akin (but not identical) to 'match probabilities' in DNA forensics. (2) A basic theoretical framework for calculating likelihood ratios or posterior probabilities for forensic hypotheses based on microbial genetic comparisons has been formulated. This 'inference-on-networks' framework has deep but simple connections to the population genetics of mtDNA and Y-STRs in human DNA forensics. (3) The 'phylogeographic' approach to identifying microbial sources is not an adequate basis for understanding bacterial population genetics in a forensic context, and has limited utility, even for generating 'leads' with respect to strain origin. (4) A collection of genotyped isolates obtained opportunistically from international locations augmented by phylogenetic representations of relatedness will not and enzootic outbreaks noted through international outbreak surveillance systems, and 'representative' genetic sequences from each outbreak. (5) Interpretation of genetic comparisons between an attack strain and reference strains requires a model for the network structure of maintenance foci, enzootic outbreaks, and human outbreaks of that disease, coupled with estimates of mutational rate constants. Validation of the model requires a set of sequences from exemplary outbreaks and laboratory data on mutation rates during animal passage. The necessary number of isolates in each validation set is determined by disease transmission network theory, and is based on the 'network diameter' of the outbreak. (6) The 8 bacteria in this study can be classified into 4 categories based on the complexity of the transmission network structure of their natural maintenance foci and their outbreaks, both enzootic and zoonotic. (7) For B. anthracis, Y. pestis, E. coli O157, and Brucella melitensis, and their primary natural animal hosts, most of the fundamental parameters needed for modeling genetic change within natural host or human transmission networks have been determined or can be estimated from existing field and laboratory studies. (8) For Burkholderia mallei, plausible approaches to transmission network models exist, but much of the fundamental parameterization does not. In addition, a validated high-resolution typing system for characterizing genetic change within outbreaks or foci has not yet been demonstrated, although a candidate system exists. (9) For Francisella tularensis, the increased complexity of the transmission network and unresolved questions about maintenance and transmission suggest that it will be more complex and difficult to develop useful models based on currently available data. (10) For Burkholderia pseudomallei and Clostridium botulinum, the transmission and maintenance networks involve complex soil communities and metapopulations about which very little is known. It is not clear that these pathogens can be brought into the in

  4. 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 ...

  5. 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...

  6. 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.

  7. 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

  8. 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

  9. 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...

  10. 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

  11. 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

  12. 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

  13. Obstacle to populating the string theory landscape

    SciTech Connect (OSTI)

    Johnson, Matthew C; Larfors, Magdalena

    2008-12-15

    We construct domain walls and instantons in a class of models with coupled scalar fields, determining, in agreement with previous studies, that many such solutions contain naked timelike singularities. Vacuum bubble solutions of this type do not contain a region of true vacuum, obstructing the ability of eternal inflation to populate other vacua. We determine a criterion that potentials must satisfy to avoid the existence of such singularities and show that many domain wall solutions in type IIB string theory are singular.

  14. Presented by LandScan Population Research

    E-Print Network [OSTI]

    by UT-Battelle for the U.S. Department of Energy Bhaduri_LandScan_SC10 Kosovo Refugee Crisis 1998 May 25 of Energy Bhaduri_LandScan_SC10 What is LandScan? Population distribution model, database, and tool people are located #12;3 Managed by UT-Battelle for the U.S. Department of Energy Bhaduri_LandScan_SC10

  15. Comparing Two Population Proportions March 4, 2010

    E-Print Network [OSTI]

    Lega, Joceline

    Comparing Two Population Proportions March 4, 2010 In this worksheet, we will test whether or not the proportions of blue M&M's and red M&M's in a random package are the same. Before beginning, do you think&M's, this is n1. Count the total number of red M&M's and compute the proportion. This is p1. n1 = p1 = 3. Open

  16. Core-Collapse Very Massive Stars: Evolution, Explosion, and Nucleosynthesis of Population III 500 -- 1000 $M_{\\odot}$ Stars

    E-Print Network [OSTI]

    T. Ohkubo; H. Umeda; K. Maeda; K. Nomoto; T. Suzuki; S. Tsuruta; M. J. Rees

    2006-05-09

    We calculate evolution, collapse, explosion, and nucleosynthesis of Population III very-massive stars with 500$M_{\\odot}$ and 1000$M_{\\odot}$. Presupernova evolution is calculated in spherical symmetry. Collapse and explosion are calculated by a two-dimensional code, based on the bipolar jet models. We compare the results of nucleosynthesis with the abundance patterns of intracluster matter, hot gases in M82, and extremely metal-poor stars in the Galactic halo. It was found that both 500$M_{\\odot}$ and 1000$M_{\\odot}$ models enter the region of pair-instability but continue to undergo core collapse. In the presupernova stage, silicon burning regions occupy a large fraction, more than 20% of the total mass. For moderately aspherical explosions, the patterns of nucleosynthesis match the observational data of both intracluster medium and M82. Our results suggest that explosions of Population III core-collapse very-massive stars contribute significantly to the chemical evolution of gases in clusters of galaxies. For Galactic halo stars, our [O/Fe] ratios are smaller than the observational abundances. However, our proposed scenario is naturally consistent with this outcome. The final black hole masses are $\\sim 230M_{\\odot}$ and $\\sim 500M_{\\odot}$ for the $500M_{\\odot}$ and 1000$M_{\\odot}$ models, respectively. This result may support the view that Population III very massive stars are responsible for the origin of intermediate mass black holes which were recently reported to be discovered.

  17. Hot film/wire calibration for low to moderate flow velocities This article has been downloaded from IOPscience. Please scroll down to see the full text article.

    E-Print Network [OSTI]

    Van Hirtum, Annemie

    Hot film/wire calibration for low to moderate flow velocities This article has been downloaded from fluid flow dynamic properties by deducing instantaneous velocities from local heat transfer information) or the characteristics of a laminar pipe flow (Yue and Malmstrom 1998). Despite the complexity of some techniques

  18. Thomas, J.R. and Clem, A.W, 1991, PWR moderator temperature coefficient via noise analysis: time series methods, Proceedings of SMORNVI, Gatlinburg, 34.01

    E-Print Network [OSTI]

    Pázsit, Imre

    .M.R., 1974, Random Processes in Nuclear Reactors, Pergamon Press, Oxford #12; ­ 35 ­ Ku, C.C., Lee K.Y., and Edwards R.M., 1991, Neural network for adapting nuclear power plant control for wide­range operation, Noise Analysis Method for Monitoring the Moderator Temperature Coefficient of Pressurized Water Reactors

  19. 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...

  20. 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...

  1. 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...

  2. 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...

  3. 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...

  4. 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

  5. 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...

  6. 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.

  7. Improving Healthcare for Populations: Building Smart and Integrated Remote Health Monitoring Systems

    E-Print Network [OSTI]

    Alshurafa, Nabil

    2015-01-01

    for Populations: Building Smart and Integrated Remote Healthfor Populations: Building Smart and Integrated Remote Health

  8. The effects of a steam-electric generating plant on suitability of adjacent estuarine waters for growth of phytoplankton 

    E-Print Network [OSTI]

    Kelsey, John Allen

    1974-01-01

    by fluoromet- rically measuring the growth of Skeletonema costatum and naturally occurring mixed phytoplankton populations in an artificial seawater medium (NH-15), filter sterilized sample water and a 1:1 mixture of the NH-15 and sterile sample medium... AND METHODS 14 Hydrological Method . Sampling and Sample Treatment Glassware Preparation Method Standing Crop Measurement Method Primary Production Rate Measurement Method Medium Suitability Assay Method 14 14 15 16 17 19 RESULTS. 24 Hydrological...

  9. Energetics of Yellow-Bellied Marmot Populations

    E-Print Network [OSTI]

    Kilgore, Delbert L.; Armitage, Kenneth

    1978-01-01

    . Neither the energy value of marmot tissue nor the net efficiency of growth was determined; instead, values from other rodents were used: energy value of live-weight tissue of neonates (K,), 4.31 kJ/g (Gorecki 1965), of weanling animals (K2), 6.0 k... sunrise to near dark, the location and activity of each marmot was recorded at 10-min intervals. Laboratory studies Food consumption measurements, from which esti- mates of energy intake, digested energy, and digestive efficiency were obtained, were...

  10. Genetic diversity and population structure of disjunct Newfoundland and central Ontario

    E-Print Network [OSTI]

    Innes, David J.

    Genetic diversity and population structure of disjunct Newfoundland and central Ontario populations geographical range in Newfoundland for comparison with three populations from its central range in Ontario populations examined. The Newfoundland populations were as genetically variable as those from Ontario

  11. Growth, survival, distribution, and population estimates of penaeid shrimp in fertilized and unfertilized brackish water ponds receiving thermal effluents 

    E-Print Network [OSTI]

    Furness, Gary Neal

    1978-01-01

    ; UF designates ponds receiving no fertilizer. Ponds 2 and 3 were stocked with 7, 500 shrimp; ponds 4-6 were stocked with 5, 000 shrimp Heavy metal concentrations of tail meat of samples from fertilized (F) ponds 2, 4, and 6, and unfertilized (UF... the brown shrimp experiment. ' Ponds are in order of decreasing bottom softness, from left to right, in the qualitative test. Quantitative results are in depth of penetration (cm) 121 134 137 Table 19 Summary of the tail meat heavy metal analyses...

  12. Variation in, inheritance of, and correlations between a number of growth and form traits in three sycamore populations 

    E-Print Network [OSTI]

    Nebgen, Russell James

    1980-01-01

    to evaluate different breeding strategies. Genet1c correlations and the coeff1cient of genetic pred1ction (CGp) prov1de informat1on as to how selection for one train w111 affect other important traits. For example, selection for volume could lower wood...milar results 1n two natural stands at Yucatan and Catfish Point, Mississippi . In a 7-year old sycamore plantation, Sauc1er and Ike (1969) exam1ned specific gravities for the first three rings following dif- ferent fertilizer applications (applied...

  13. Linking Dynamical and Population Genetic Models of Persistent Viral Infection

    E-Print Network [OSTI]

    Kelly, John K.; Williamson, Scott; Orive, Maria E.; Smith, Marilyn S.; Holt, Robert D.

    2003-07-01

    This article develops a theoretical framework to link dynamical and population genetic models of persistent viral infection. This linkage is useful because, while the dynamical and population genetic theories have developed ...

  14. Tailored Marketing for Under-represented Population Segments...

    Energy Savers [EERE]

    Tailored Marketing for Under-represented Population Segments (201) Tailored Marketing for Under-represented Population Segments (201) August 13, 2015 3:00PM to 4:3...

  15. Population dynamics and management of free-roaming cats 

    E-Print Network [OSTI]

    Hill, Paige McGee

    2006-08-16

    (Felis catus) populations. Thus, some information is repeated among chapters (i.e., problem definition, study area description). 3 CHAPTER II POPULATION DYNAMICS OF FREE-ROAMING CATS SYNOPSIS Free-roaming cats impact wildlife worldwide through...

  16. Size Dependent Population Dynamics of Microtus Ochrogaster

    E-Print Network [OSTI]

    Sauer, John R.; Slade, Norman A.

    1986-06-01

    stream_size 20190 stream_content_type text/plain stream_name slade_american_naturalist.pdf.txt stream_source_info slade_american_naturalist.pdf.txt Content-Encoding UTF-8 Content-Type text/plain; charset=UTF-8 Vol. 127... therefore could make no direct comparison of age- and mass-based methods (such as the analysis in Werner and Caswell 1977 of a population of teasel, Dipsacus sylvestris Huds.). Subsequent to our analysis of voles, we com­ pared age- and mass...

  17. RESEARCH ARTICLE Population structure, dispersal and colonization history

    E-Print Network [OSTI]

    the population structure of the bumblebee Bombus hortorum in a model island system, the Western Isles of Scotland

  18. Lubricating bacteria model for the growth of bacterial colonies exposed to ultraviolet radiation

    SciTech Connect (OSTI)

    Zhang Shengli; Zhang Lei; Liang Run; Zhang Erhu; Liu Yachao; Zhao Shumin

    2005-11-01

    In this paper, we study the morphological transition of bacterial colonies exposed to ultraviolet radiation by modifying the bacteria model proposed by Delprato et al. Our model considers four factors: the lubricant fluid generated by bacterial colonies, a chemotaxis initiated by the ultraviolet radiation, the intensity of the ultraviolet radiation, and the bacteria's two-stage destruction rate with given radiation intensities. Using this modified model, we simulate the ringlike pattern formation of the bacterial colony exposed to uniform ultraviolet radiation. The following is shown. (1) Without the UV radiation the colony forms a disklike pattern and reaches a constant front velocity. (2) After the radiation is switched on, the bacterial population migrates to the edge of the colony and forms a ringlike pattern. As the intensity of the UV radiation is increased the ring forms faster and the outer velocity of the colony decreases. (3) For higher radiation intensities the total population decreases, while for lower intensities the total population increases initially at a small rate and then decreases. (4) After the UV radiation is switched off, the bacterial population grows both outward as well as into the inner region, and the colony's outer front velocity recovers to a constant value. All these results agree well with the experimental observations [Phys. Rev. Lett. 87, 158102 (2001)]. Along with the chemotaxis, we find that lubricant fluid and the two-stage destruction rate are critical to the dynamics of the growth of the bacterial colony when exposed to UV radiation, and these were not previously considered.

  19. 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.

  20. 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

  1. 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

  2. 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

  3. 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

  4. Photosynthetic pigment concentrations, gas exchange and vegetative growth for selected monocots and dicots treated with two contrasting coal fly ashes

    SciTech Connect (OSTI)

    Yunusa, I.A.M.; Burchett, M.D.; Manoharan, V.; DeSilva, D.L.; Eamus, D.; Skilbeck, C.G.

    2009-07-15

    There is uncertainty as to the rates of coal fly ash needed for optimum physiological processes and growth. In the current study we tested the hyothesis that photosynthetic pigments concentrations and CO{sub 2} assimilation (A) are more sensitive than dry weights in plants grown on media amended with coal fly ash. We applied the Terrestrial Plant Growth Test (Guideline 208) protocols of the Organization for Economic Cooperation and Development (OECD) to monocots (barley (Hordeum vulgare) and ryegrass (Secale cereale)) and dicots (canola (Brasica napus), radish (Raphanus sativus), field peas (Pisum sativum), and lucerne (Medicago sativa)) on media amended with fly ashes derived from semi-bituminous (gray ash) or lignite (red ash) coals at rates of 0, 2.5, 5.0, 10, or 20 Mg ha(-1). The red ash had higher elemental concentrations and salinity than the gray ash. Fly ash addition had no significant effect on germination by any of the six species. At moderate rates ({<=}10 Mg ha{sup -1}) both ashes increased (P < 0.05) growth rates and concentrations of chlorophylls a and b, but reduced carotenoid concentrations. Addition of either ash increased A in radish and transpiration in barley. Growth rates and final dry weights were reduced for all of the six test species when addition rates exceeded 10 Mg ha{sup -1} for gray ash and 5 Mg ha{sup -1} for red ash. We concluded that plant dry weights, rather than pigment concentrations and/or instantaneous rates of photosynthesis, are more consistent for assessing subsequent growth in plants supplied with fly ash.

  5. The reionization of galactic satellite populations

    SciTech Connect (OSTI)

    Ocvirk, P.; Gillet, N.; Aubert, D.; Chardin, J. [Observatoire Astronomique de Strasbourg, Université de Strasbourg, CNRS UMR 7550, 11 rue de l'Université, F-67000 Strasbourg (France); Knebe, A.; Yepes, G. [Grupo de Astrofísica, Departamento de Fisica Teorica, Modulo C-8, Universidad Autónoma de Madrid, Cantoblanco E-280049 (Spain); Libeskind, N.; Gottlöber, S. [Leibniz-Institute für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam (Germany); Hoffman, Y. [Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel)

    2014-10-10

    We use high-resolution simulations of the formation of the local group, post-processed by a radiative transfer code for UV photons, to investigate the reionization of the satellite populations of an isolated Milky Way-M31 galaxy pair in a variety of scenarios. We use an improved version of ATON which includes a simple recipe for radiative feedback. In our baseline models, reionization is initiated by low-mass, radiatively regulated halos at high redshift, until more massive halos appear, which then dominate and complete the reionization process. We investigate the relation between reionization history and present-day positions of the satellite population. We find that the average reionization redshift (z {sub r}) of satellites is higher near galaxy centers (MW and M31). This is due to the inside out reionization patterns imprinted by massive halos within the progenitor during the epoch of reionization, which end up forming the center of the galaxy. Due to incomplete dynamical mixing during galaxy assembly, these early patterns survive to present day, resulting in a clear radial gradient in the average satellite reionization redshift, up to the virial radius of MW and M31 and beyond. In the lowest emissivity scenario, the outer satellites are reionized about 180 Myr later than the inner satellites. This delay decreases with increasing source model emissivity, or in the case of external reionization by Virgo or M31, because reionization occurs faster overall and becomes spatially quasi-uniform at the highest emissivity.

  6. Growth History Of Kilauea Inferred From Volatile Concentrations...

    Open Energy Info (EERE)

    level, at moderate water depths (300-1000 m) or shallower but in disequilibrium, and in deep water (> 1000 m). Saturation pressures range widely in early alkalic to strongly...

  7. 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.

  8. 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.

  9. Decommissioning the Romanian Water-Cooled Water-Moderated Research Reactor: New Environmental Perspective on the Management of Radioactive Waste

    SciTech Connect (OSTI)

    Barariu, G.; Giumanca, R. [Romanian Authority for Nuclear Activity (RAAN), Subsidiary of Technology and Engineering for Nuclear Objectives (SITON), 111 Atomistilor St., Bucuresti-Magurele, Ilfov (Romania)

    2006-07-01

    Pre-feasibility and feasibility studies were performed for decommissioning of the water-cooled water-moderated research reactor (WWER) located in Bucharest - Magurele, Romania. Using these studies as a starting point, the preferred safe management strategy for radioactive wastes produced by reactor decommissioning is outlined. The strategy must account for reactor decommissioning, as well as for the rehabilitation of the existing Radioactive Waste Treatment Plant and for the upgrade of the Radioactive Waste Disposal Facility at Baita-Bihor. Furthermore, the final rehabilitation of the laboratories and ecological reconstruction of the grounds need to be provided for, in accordance with national and international regulations. In accordance with IAEA recommendations at the time, the pre-feasibility study proposed three stages of decommissioning. However, since then new ideas have surfaced with regard to decommissioning. Thus, taking into account the current IAEA ideology, the feasibility study proposes that decommissioning of the WWER be done in one stage to an unrestricted clearance level of the reactor building in an Immediate Dismantling option. Different options and the corresponding derived preferred option for waste management are discussed taking into account safety measures, but also considering technical, logistical and economic factors. For this purpose, possible types of waste created during each decommissioning stage are reviewed. An approximate inventory of each type of radioactive waste is presented. The proposed waste management strategy is selected in accordance with the recommended international basic safety standards identified in the previous phase of the project. The existing Radioactive Waste Treatment Plant (RWTP) from the Horia Hulubei Institute for Nuclear Physics and Engineering (IFIN-HH), which has been in service with no significant upgrade since 1974, will need refurbishing due to deterioration, as well as upgrading in order to ensure the plant complies with current safety standards. This plant will also need to be adapted to treat wastes generated by WWER dismantling. The Baita-Bihor National Radioactive Waste Disposal Facility consists of two galleries in an abandoned uranium mine located in the central-western part of the Bihor Mountains in Transylvania. The galleries lie at a depth of 840 m. The facility requires a considerable overhaul. Several steps recommended for the upgrade of the facility are explored. Environmental concerns have lately become a crucial part of the radioactive waste management strategy. As such, all decisions must be made with great regard for land utilization around nuclear objectives. (authors)

  10. 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.

  11. 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.

  12. Demography and Populations Extremes of avian life history

    E-Print Network [OSTI]

    Butler, Christopher J.

    are initially high among birds old and decline to a lower level as adults Reproductive success improves Late (8-10 yr) Early (1 yr) Fecundity Low (0.2 young per yr) Moderate (3 young per yr) Adult mortality Table #12;#12;Survival rate of young birds is ~50% of adult survival rate #12;Post-fledging Survivorship

  13. A nuclear criticality safety assessment of the loss of moderation control in 2 1/2 and 10-ton cylinders containing enriched UF{sub 6}

    SciTech Connect (OSTI)

    Newvahner, R.L. [Martin Marietta Energy Systems, Inc., Piketon, OH (United States); Pryor, W.A. [PAI Corp., Oak Ridge, TN (United States)

    1991-12-31

    Moderation control for maintaining nuclear criticality safety in 2 {1/2}-ton, 10-ton, and 14-ton cylinders containing enriched uranium hexafluoride (UF{sub 6}) has been used safely within the nuclear industry for over thirty years, and is dependent on cylinder integrity and containment. This assessment evaluates the loss of moderation control by the breaching of containment and entry of water into the cylinders. The first objective of this study was to estimate the required amounts of water entering these large UF{sub 6} cylinders to react with, and to moderate the uranium compounds sufficiently to cause criticality. Hypothetical accident situations were modeled as a uranyl fluoride (UO{sub 2}F{sub 2}) slab above a UF{sub 6} hemicylinder, and a UO{sub 2}F{sub 2} sphere centered within a UF{sub 6} hemicylinder. These situations were investigated by computational analyses utilizing the KENO V.a Monte Carlo Computer Code. The results were used to estimate both the masses of water required for criticality, and the limiting masses of water that could be considered safe. The second objective of the assessment was to calculate the time available for emergency control actions before a criticality would occur, i.e., a {open_quotes}safetime{close_quotes}, for various sources of water and different size openings in a breached cylinder. In the situations considered, except the case for a fire hose, the safetime appears adequate for emergency control actions. The assessment shows that current practices for handling moderation controlled cylinders of low enriched UF{sub 6}, along with the continuation of established personnel training programs, ensure nuclear criticality safety for routine and emergency operations.

  14. Old stellar populations in distant radio galaxies

    E-Print Network [OSTI]

    James Dunlop

    1998-01-13

    I describe the current status of our attempts to determine the age of the oldest known stellar populations at high redshift, in the red mJy radio galaxies 53W091 ($z = 1.55$) and 53W069 ($z = 1.43$). During the past year the original conclusion of Dunlop et al. (1996) - that 53W091 is $>3$ Gyr old - has been questioned from two, basically orthogonal directions. First, reports that the near-infrared light from 53W091 is highly polarized have cast some doubt on whether its red colour is genuinely due to an old population of stars. Second, assuming that all the light is indeed due to stars, it has been claimed that 53W091 is in fact only 1-2 Gyr old. Here I present a preliminary analysis of new infrared polarimetric observations of 53W091 which show that the first of these criticisms can be rejected with very high confidence. I then explore why different modellers have derived different ages for 53W091, and present new model fits to the spectrum of 53W069 which demonstrate that different spectral synthesis codes are certainly in good agreement that this galaxy is 3-4 Gyr old. Finally I present a preliminary analysis of the morphologies and scale-lengths of 53W091 and 53W069 as derived from new I-band WFPC2 HST images, and compare the results with those for 3CR galaxies at comparable redshifts. I conclude that the scalelengths and luminosities of radio galaxies at $z \\simeq 1.5$ appear to scale together as would be predicted from the Kormendy relation for low-redshift elliptical galaxies.

  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. 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.

  7. INTERACTION OF FOOD LEVEL AND EXPLOITATION IN 'EXPERIMENTAL FISH POPULATIONS

    E-Print Network [OSTI]

    ,n indbtting thn,t, n deerellsed supply of foocl reduced the mte of growt,h lwd eltt,ehes of breltm Published

  8. Special population planner, version 4.0.

    SciTech Connect (OSTI)

    Kuiper, J.; Tanzman, E.; Metz, W.

    2007-03-26

    Emergencies happen every day. Many are caused by storms or auto accidents and can be planned for, if not predicted. Emergencies resulting from natural hazards often affect a large number of people, and planning for them can be difficult, since knowledge of the needs of the people involved is generally unavailable. Emergencies resulting from accidents at industrial and military facilities can also be large scale in nature if people must be evacuated or sheltered in place. Federal planning for large scale emergencies is the responsibility of the Federal Emergency Management Agency (FEMA), which provides assistance to various emergency management agencies at the national, state and local level. More information about FEMA is available at http://www.fema.gov/. The purpose of the Special Population Planner (SPP) is to help emergency planners address the needs of persons with special needs. The exact definition of 'special population' is a policy decision. Policymakers have included a variety of groups in this term, such as persons with disabilities, those who do not have vehicles with which to evacuate, children who are unattended at times (latchkey children), and many others. The SPP was developed initially for the Alabama Emergency Management Agency as part of its Chemical Stockpile Emergency Preparedness Program (CSEPP), which aids emergency planning and preparedness in communities surrounding military installations across the United States where chemical weapons are stored pending their destruction under federal law. Like that specialized application, this open-source version contains a set of specialized Geographic Information System (GIS) tools to facilitate emergency planning on behalf of persons with special needs, regardless of how the term is defined. While the original SPP system was developed for emergency planning relating to chemical hazards, it can be applied to other threats as well. It is apparent from Hurricane Katrina and other natural and man-made disasters that many of the problems posed by emergency planning for a chemical weapons agent release are shared by other hazards as well. The notion that emergency planning shares common functions underlies the decision by FEMA to include the Chemical Stockpile Emergency Preparedness Program (CSEPP) in its 'all-hazards' planning approach. The CSEPP's official planning guidance operationalizes this approach by suggesting that state and local CSEPP emergency plans 'should be appended to the existing all-hazards emergency plan.' The SPP is programmed as a set of tools within an ESRI ArcMap 9.1 project. ArcMap is a component of both ESRI ArcGIS 9.1 and ESRI ArcView 9.1, and it provides a rich GIS user interface for viewing spatial and tabular data, analyzing it, and producing output reports and maps. This GIS interface has been augmented with the SPP tools for a user interface that provides custom functionality for emergency planning. The system as released also includes some hypothetical example records for special needs populations, facilities, resources, control points and sirens sufficient for showing how the system would work with real information. A GIS database is included with some publicly available example layers. The SPP is designed to support emergency planners as they address emergency management issues, and includes capabilities that support the collection and importing of data, the review of data in a spatial context, and GIS tools for emergency planning. The SPP system allows for the identification and categorization of response zones to allow for multiple levels of preparedness. An Immediate Response Zone (IRZ) might be designated as the area 0 to 10 miles from a facility where the response would be the most urgent. SPP can support more than one set of planning zones to accommodate different types of emergencies or the different jurisdictions of emergency response organizations. These areas can be delineated by any number of criteria that make sense for the area. An area like New Orleans might designate response zones based on the depth above/below s

  9. Projection of Chinese motor vehicle growth, oil demand, and CO{sub 2}emissions through 2050.

    SciTech Connect (OSTI)

    Wang, M.; Huo, H.; Johnson, L.; He, D.

    2006-12-20

    As the vehicle population in China increases, oil consumption and carbon dioxide (CO{sub 2}) emissions associated with on-road transportation are rising dramatically. During this study, we developed a methodology to project trends in the growth of the vehicle population, oil demand, and CO{sub 2} emissions associated with on-road transportation in China. By using this methodology, we projected--separately--the number of highway vehicles, motorcycles, and rural vehicles in China through 2050. We used three scenarios of highway vehicle growth (high-, mid-, and low-growth) to reflect patterns of motor vehicle growth that have occurred in different parts of the world (i.e., Europe and Asia). All are essentially business-as-usual scenarios in that almost none of the countries we examined has made concerted efforts to manage vehicle growth or to offer serious alternative transportation means to satisfy people's mobility needs. With this caveat, our projections showed that by 2030, China could have more highway vehicles than the United States has today, and by 2035, it could have the largest number of highway vehicles in the world. By 2050, China could have 486-662 million highway vehicles, 44 million motorcycles, and 28 million rural vehicles. These numbers, which assume essentially unmanaged vehicle growth, would result in potentially disastrous effects on the urban infrastructure, resources, and other social and ecological aspects of life in China. We designed three fuel economy scenarios, from conservative to aggressive, on the basis of current policy efforts and expectations of near-future policies in China and in developed countries. It should be noted that these current and near-future policies have not taken into consideration the significant potential for further fuel economy improvements offered by advanced technologies such as electric drive technologies (e.g., hybrid electric vehicles and fuel-cell vehicles). By using vehicle growth projections and potential vehicle fuel economy, we projected that China's on-road vehicles could consume approximately 614-1016 million metric tons of oil per year (12.4-20.6 million barrels per day) and could emit 1.9-3.2 billion metric tons of CO{sub 2} per year in 2050, which will put tremendous pressure on the balance of the Chinese and world oil supply and demand and could have significant implications on climate change. Our analysis shows that, while improvements in vehicle fuel economy are crucial for reducing transportation energy use, containing the growth of the vehicle population could have an even more profound effect on oil use and CO{sub 2} emissions. This benefit is in addition to other societal and environmental benefits--such as reduced congestion, land use, and urban air pollution--that will result from containing vehicle population growth. Developing public transportation systems for personal travel and rail and other modes for freight transportation will be important for containing the growth of motor vehicles in China. Although the population of passenger cars will far exceed that of all truck types in China in the future, our analysis shows that oil use by and CO{sub 2} emissions from the Chinese truck fleet will be far larger than those related to Chinese passenger cars because trucks are very use intensive (more vehicle miles traveled per year) and energy intensive (lower fuel economy). Unfortunately, the potential for improving fuel economy and reducing air pollutant emissions for trucks has not been fully explored; such efforts are needed. Considering the rapid depletion of the world's oil reserve, the heightened global interest in addressing greenhouse gas emissions, and the geopolitical complications of global oil supply and demand, the study results suggest that unmanaged vehicle growth and limited improvements in vehicle fuel efficiency will lead to an unsustainable and unstable transportation system in China. In other words, while our projections do not definitively indicate what will happen in the Chinese transportation sector by 2050, they do demonstrate

  10. Long-term monitoring of reef corals at the Flower Garden Banks (northwest Gulf of Mexico): Reef coral population changes and historical incorporation of barium in Montastrea annularis

    SciTech Connect (OSTI)

    Deslarzes, K.J.P.

    1992-01-01

    Reef coral populations were monitored from 1988 to 1991 at the Flower Garden Banks located in the northwestern Gulf of Mexico. The status of reef coral populations, and natural or man-made factors potentially affecting their well-being were determined. Man-made chronic disturbances are degrading coral reef resources on a global scale. Yet, the Flower Garden coral reefs seem to have been sheltered from the effects of regional stresses generated by population growth and increased industrial activity. Since 1974, reef coral population levels have remained unchanged in the Montastrea-Diploria Zones at the Flower Garden Banks. Live coral cover ranges between 46 and 46.5%. Montastrea annularis and Diploria strigosa comprise 80% of the coral cover on either bank. The remainder of the cover is mostly shared by eight other taxa. Coral taxa appear to be more homogeneously distributed on the West Bank. The relatively greater number of Agaricia spp., Madracis decastis, and P. astreoides colonies on the East Bank may be the source of a decreased evenness. The health of reef corals was assessed using repetitive and non-repetitive photographic methods, and accretionary growth measurements of M. annularis. Reef corals have undergone small scale changes at the Flower Gardens probably reflecting natural disturbance, predation, disease, and inter-specific competition. White mat disease (ridge disease) is shown to generate more tissue loss than any of the three bleaching events that took place at the Flower Gardens (1989, 1990, and 1991). Advance to retreat linear ratios of encrusting growth revealed a net tissue gain on the East Bank and a net tissue loss on the West Bank. Growth rates of M. annularis were highly variable. The annual barium content from 1910 in 1989 in a M. annularis colony from the West Flower Garden did not reveal trends associated with the extensive oil and gas exploration in the northern Gulf of Mexico.

  11. Aqueous precipitation: Population balance modeling and control in multi-cation systems

    SciTech Connect (OSTI)

    Voigt, J.A.

    1996-03-01

    Efficient separation of metal species from aqueous streams by precipitation techniques requires a fundamental understanding of the processes that occur during precipitation. These processes include particle nucleation, particle growth by solute deposition, agglomerate formation, and agglomerate breakup. Population balance method has been used to develop a kinetic model that accounts for these competing kinetic processes. The usefulness of the model is illustrated through its application to precipitation of yttrium hydroxynitrate, YHN. Kinetic parameters calculated from the model equations and system-specific solution chemistry are used to describe several aspects of the effect of pH on YHN precipitation. Implications for simultaneous precipitation of more than one cation type are discussed with examples. Effects of solution chemistry, precipitator design, and solvent choice are considered.

  12. The Stellar Populations of NGC 3109: Another Dwarf Irregular Galaxy with a Population II Stellar Halo

    E-Print Network [OSTI]

    Dante Minniti; Albert Zijlstra; M. Victoria Alonso

    1998-10-29

    We have obtained V and I-band photometry for about 17500 stars in the field of the dwarf irregular galaxy NGC3109, located in the outskirts of the Local Group. The photometry allows us to study the stellar populations present inside and outside the disk of this galaxy. From the VI color-magnitude diagram we infer metallicities and ages for the stellar populations in the main body and in the halo of NGC3109. The stars in the disk of this galaxy have a wide variety of ages, including very young stars with approximately 10^7 yr. Our main result is to establish the presence of a halo consisting of population II stars, extending out to about 4.5 arcmin (or 1.8 kpc) above and below the plane of this galaxy. For these old stars we derive an age of > 10 Gyr and a metallicity of [Fe/H] = -1.8 +/- 0.2. We construct a deep luminosity function, obtaining an accurate distance modulus (m-M)_0 = 25.62 +/- 0.1 for this galaxy based on the I-magnitude of the red giant branch (RGB) tip and adopting E(V-I) = 0.05.

  13. Magnetic Fields in Population III Star Formation

    SciTech Connect (OSTI)

    Turk, Matthew J.; Oishi, Jeffrey S.; Abel, Tom; Bryan, Greg

    2012-02-22

    We study the buildup of magnetic fields during the formation of Population III star-forming regions, by conducting cosmological simulations from realistic initial conditions and varying the Jeans resolution. To investigate this in detail, we start simulations from identical initial conditions, mandating 16, 32 and 64 zones per Jeans length, and studied the variation in their magnetic field amplification. We find that, while compression results in some amplification, turbulent velocity fluctuations driven by the collapse can further amplify an initially weak seed field via dynamo action, provided there is sufficient numerical resolution to capture vortical motions (we find this requirement to be 64 zones per Jeans length, slightly larger than, but consistent with previous work run with more idealized collapse scenarios). We explore saturation of amplification of the magnetic field, which could potentially become dynamically important in subsequent, fully-resolved calculations. We have also identified a relatively surprising phenomena that is purely hydrodynamic: the higher-resolved simulations possess substantially different characteristics, including higher infall-velocity, increased temperatures inside 1000 AU, and decreased molecular hydrogen content in the innermost region. Furthermore, we find that disk formation is suppressed in higher-resolution calculations, at least at the times that we can follow the calculation. We discuss the effect this may have on the buildup of disks over the accretion history of the first clump to form as well as the potential for gravitational instabilities to develop and induce fragmentation.

  14. 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.

  15. 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.

  16. 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 ...

  17. 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.

  18. 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.

  19. Visualizing Diurnal Population Change in Urban Areas for Emergency Management

    SciTech Connect (OSTI)

    Kobayashi, Tetsuo; Medina, Richard M; Cova, Thomas

    2011-01-01

    There is an increasing need for a quick, simple method to represent diurnal population change in metropolitan areas for effective emergency management and risk analysis. Many geographic studies rely on decennial U.S. Census data that assume that urban populations are static in space and time. This has obvious limitations in the context of dynamic geographic problems. The U.S. Department of Transportation publishes population data at the transportation analysis zone level in fifteen-minute increments. This level of spatial and temporal detail allows for improved dynamic population modeling. This article presents a methodology for visualizing and analyzing diurnal population change for metropolitan areas based on this readily available data. Areal interpolation within a geographic information system is used to create twenty-four (one per hour) population surfaces for the larger metropolitan area of Salt Lake County, Utah. The resulting surfaces represent diurnal population change for an average workday and are easily combined to produce an animation that illustrates population dynamics throughout the day. A case study of using the method to visualize population distributions in an emergency management context is provided using two scenarios: a chemical release and a dirty bomb in Salt Lake County. This methodology can be used to address a wide variety of problems in emergency management.

  20. The Other 15%: Expanding Energy Efficiency to Rural Populations

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

    Populations September 10, 2015 Call Slides and Discussion Summary Agenda Call Logistics and Opening Poll Residential Network and Peer Exchange Call Overview ...

  1. Population estimates for Phase 1: Hanford Environmental Dose Reconstruction Project

    SciTech Connect (OSTI)

    Beck, D.M.; Erickson, A.R.; Harkreader, S.A.

    1992-03-01

    This report summarizes the population estimates of Phase I of the Hanford Environmental Dose Reconstruction (HEDR) Project. These estimates were used to develop preliminary dose estimates.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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...

  7. 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...

  8. 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...

  9. 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...

  10. 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...

  11. 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...

  12. Effects of aging in catastrophe on the steady state and dynamics of a microtubule population

    E-Print Network [OSTI]

    V. Jemseena; Manoj Gopalakrishnan

    2015-07-01

    Several independent observations have suggested that catastrophe transition in microtubules is not a first-order process, as is usually assumed. Recent {\\it in vitro} observations by Gardner et al.[ M. K. Gardner et al., Cell {\\bf147}, 1092 (2011)] showed that microtubule catastrophe takes place via multiple steps and the frequency increases with the age of the filament. Here, we investigate, via numerical simulations and mathematical calculations, some of the consequences of age dependence of catastrophe on the dynamics of microtubules as a function of the aging rate, for two different models of aging: exponential growth, but saturating asymptotically and purely linear growth. The boundary demarcating the steady state and non-steady state regimes in the dynamics is derived analytically in both cases. Numerical simulations, supported by analytical calculations in the linear model, show that aging leads to non-exponential length distributions in steady state. More importantly, oscillations ensue in microtubule length and velocity. The regularity of oscillations, as characterized by the negative dip in the autocorrelation function, is reduced by increasing the frequency of rescue events. Our study shows that age dependence of catastrophe could function as an intrinsic mechanism to generate oscillatory dynamics in a microtubule population, distinct from hitherto identified ones.

  13. HTR-PROTEUS Pebble Bed Experimental Program Cores 1, 1A, 2, and 3: Hexagonal Close Packing with a 1:2 Moderator-to-Fuel Pebble Ratio

    SciTech Connect (OSTI)

    John D. Bess; Barbara H. Dolphin; James W. Sterbentz; Luka Snoj; Igor Lengar; Oliver Köberl

    2012-03-01

    In its deployment as a pebble bed reactor (PBR) critical facility from 1992 to 1996, the PROTEUS facility was designated as HTR-PROTEUS. This experimental program was performed as part of an International Atomic Energy Agency (IAEA) Coordinated Research Project (CRP) on the Validation of Safety Related Physics Calculations for Low Enriched HTGRs. Within this project, critical experiments were conducted for graphite moderated LEU systems to determine core reactivity, flux and power profiles, reaction-rate ratios, the worth of control rods, both in-core and reflector based, the worth of burnable poisons, kinetic parameters, and the effects of moisture ingress on these parameters. Four benchmark experiments were evaluated in this report: Cores 1, 1A, 2, and 3. These core configurations represent the hexagonal close packing (HCP) configurations of the HTR-PROTEUS experiment with a moderator-to-fuel pebble ratio of 1:2. Core 1 represents the only configuration utilizing ZEBRA control rods. Cores 1A, 2, and 3 use withdrawable, hollow, stainless steel control rods. Cores 1 and 1A are similar except for the use of different control rods; Core 1A also has one less layer of pebbles (21 layers instead of 22). Core 2 retains the first 16 layers of pebbles from Cores 1 and 1A and has 16 layers of moderator pebbles stacked above the fueled layers. Core 3 retains the first 17 layers of pebbles but has polyethylene rods inserted between pebbles to simulate water ingress. The additional partial pebble layer (layer 18) for Core 3 was not included as it was used for core operations and not the reported critical configuration. Cores 1, 1A, 2, and 3 were determined to be acceptable benchmark experiments.

  14. HTR-PROTEUS Pebble Bed Experimental Program Cores 1, 1A, 2, and 3: Hexagonal Close Packing with a 1:2 Moderator-to-Fuel Pebble Ratio

    SciTech Connect (OSTI)

    John D. Bess; Barbara H. Dolphin; James W. Sterbentz; Luka Snoj; Igor Lengar; Oliver Köberl

    2013-03-01

    In its deployment as a pebble bed reactor (PBR) critical facility from 1992 to 1996, the PROTEUS facility was designated as HTR-PROTEUS. This experimental program was performed as part of an International Atomic Energy Agency (IAEA) Coordinated Research Project (CRP) on the Validation of Safety Related Physics Calculations for Low Enriched HTGRs. Within this project, critical experiments were conducted for graphite moderated LEU systems to determine core reactivity, flux and power profiles, reaction-rate ratios, the worth of control rods, both in-core and reflector based, the worth of burnable poisons, kinetic parameters, and the effects of moisture ingress on these parameters. Four benchmark experiments were evaluated in this report: Cores 1, 1A, 2, and 3. These core configurations represent the hexagonal close packing (HCP) configurations of the HTR-PROTEUS experiment with a moderator-to-fuel pebble ratio of 1:2. Core 1 represents the only configuration utilizing ZEBRA control rods. Cores 1A, 2, and 3 use withdrawable, hollow, stainless steel control rods. Cores 1 and 1A are similar except for the use of different control rods; Core 1A also has one less layer of pebbles (21 layers instead of 22). Core 2 retains the first 16 layers of pebbles from Cores 1 and 1A and has 16 layers of moderator pebbles stacked above the fueled layers. Core 3 retains the first 17 layers of pebbles but has polyethylene rods inserted between pebbles to simulate water ingress. The additional partial pebble layer (layer 18) for Core 3 was not included as it was used for core operations and not the reported critical configuration. Cores 1, 1A, 2, and 3 were determined to be acceptable benchmark experiments.

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. Modelling climate-related variability of tuna populations from a coupled ocean-biogeochemical-populations dynamics model

    E-Print Network [OSTI]

    Xiu, Peng

    pelamis) and yellowfin (Thunnus albacares) had higher recruitments during El Niño events, the sub of skipjack (Katsuwonus pelamis) population (Lehodey, 1997). However, the run represented a short time

  1. HTR-PROTEUS PEBBLE BED EXPERIMENTAL PROGRAM CORE 4: RANDOM PACKING WITH A 1:1 MODERATOR-TO-FUEL PEBBLE RATIO

    SciTech Connect (OSTI)

    John D. Bess; Leland M. Montierth

    2013-03-01

    In its deployment as a pebble bed reactor (PBR) critical facility from 1992 to 1996, the PROTEUS facility was designated as HTR-PROTEUS. This experimental program was performed as part of an International Atomic Energy Agency (IAEA) Coordinated Research Project (CRP) on the Validation of Safety Related Physics Calculations for Low Enriched HTGRs. Within this project, critical experiments were conducted for graphite moderated LEU systems to determine core reactivity, flux and power profiles, reaction-rate ratios, the worth of control rods, both in-core and reflector based, the worth of burnable poisons, kinetic parameters, and the effects of moisture ingress on these parameters. One benchmark experiment was evaluated in this report: Core 4. Core 4 represents the only configuration with random pebble packing in the HTR-PROTEUS series of experiments, and has a moderator-to-fuel pebble ratio of 1:1. Three random configurations were performed. The initial configuration, Core 4.1, was rejected because the method for pebble loading, separate delivery tubes for the moderator and fuel pebbles, may not have been completely random; this core loading was rejected by the experimenters. Cores 4.2 and 4.3 were loaded using a single delivery tube, eliminating the possibility for systematic ordering effects. The second and third cores differed slightly in the quantity of pebbles loaded (40 each of moderator and fuel pebbles), stacked height of the pebbles in the core cavity (0.02 m), withdrawn distance of the stainless steel control rods (20 mm), and withdrawn distance of the autorod (30 mm). The 34 coolant channels in the upper axial reflector and the 33 coolant channels in the lower axial reflector were open. Additionally, the axial graphite fillers used in all other HTR-PROTEUS configurations to create a 12-sided core cavity were not used in the randomly packed cores. Instead, graphite fillers were placed on the cavity floor, creating a funnel-like base, to discourage ordering effects during pebble loading. Core 4 was determined to be acceptable benchmark experiment.

  2. Fuel Effects on Combustion and Emissions of a Direct-Inection Diesel Engine Operating at Moderate to High Engine Speed and Load

    SciTech Connect (OSTI)

    Szybist, James P [ORNL; Szymkowicz, Patrick G. [General Motors Corporation; Northrop, William F [General Motors Corporation

    2012-01-01

    It is advantageous to increase the specific power output of diesel engines and to operate them at higher load for a greater portion of a driving cycle to achieve better thermal efficiency and thus reduce vehicle fuel consumption. Such operation is limited by excessive smoke formation at retarded injection timing and high rates of cylinder pressure rise at more advanced timing. Given this window of operation, it is desired to understand the influence of fuel properties such that optimum combustion performance and emissions can be retained over the range of fuels commonly available in the marketplace. It has been shown in previous studies that varying cetane number (CN) of diesel fuel has little effect on ignition delay at high engine load due to the domination of high cylinder temperature on ignition kinetics. The work here experimentally confirms that finding but also shows that emissions and combustion performance vary according to fuel reactivity. Data are examined from a direct-injection single cylinder research engine for eight common diesel fuels including soy-based biodiesel blends at two high load operating points with no exhaust gas recirculation (EGR) and at a moderate load with four levels of EGR. It is shown in the work that at high engine load where combustion is controlled by mixing processes, CN and other fuel properties have little effect on engine performance, although lower CN fuels produce a small increase in noise, smoke and CO emissions. Biodiesel blends increase NOX emissions and decreases CO and smoke emissions at high load, but otherwise have little effect on performance. At moderate load, higher CN fuels are more tolerant to EGR due to their better chemical reactivity at retarded injection timing, but all fuels produce comparable thermal efficiency at advanced combustion phasing regardless of EGR. In contrast to the high load conditions, there was no increase in NOX emissions for biodiesel at the moderate load condition. It is concluded that although higher CN does not significantly alter ignition delay at moderate to high loads it has a dominant influence on the acceptable injection timing range. Apart from CN effects, fuel oxygen content plays an independent role in reducing some emissions. It is therefore recommended that compensation for fuel ignitability and oxygen content be included in combustion control strategies to optimize emissions and performance of future diesel engines.

  3. HTR-PROTEUS PEBBLE BED EXPERIMENTAL PROGRAM CORE 4: RANDOM PACKING WITH A 1:1 MODERATOR-TO-FUEL PEBBLE RATIO

    SciTech Connect (OSTI)

    John D. Bess; Leland M. Montierth

    2014-03-01

    In its deployment as a pebble bed reactor (PBR) critical facility from 1992 to 1996, the PROTEUS facility was designated as HTR-PROTEUS. This experimental program was performed as part of an International Atomic Energy Agency (IAEA) Coordinated Research Project (CRP) on the Validation of Safety Related Physics Calculations for Low Enriched HTGRs. Within this project, critical experiments were conducted for graphite moderated LEU systems to determine core reactivity, flux and power profiles, reaction-rate ratios, the worth of control rods, both in-core and reflector based, the worth of burnable poisons, kinetic parameters, and the effects of moisture ingress on these parameters. One benchmark experiment was evaluated in this report: Core 4. Core 4 represents the only configuration with random pebble packing in the HTR-PROTEUS series of experiments, and has a moderator-to-fuel pebble ratio of 1:1. Three random configurations were performed. The initial configuration, Core 4.1, was rejected because the method for pebble loading, separate delivery tubes for the moderator and fuel pebbles, may not have been completely random; this core loading was rejected by the experimenters. Cores 4.2 and 4.3 were loaded using a single delivery tube, eliminating the possibility for systematic ordering effects. The second and third cores differed slightly in the quantity of pebbles loaded (40 each of moderator and fuel pebbles), stacked height of the pebbles in the core cavity (0.02 m), withdrawn distance of the stainless steel control rods (20 mm), and withdrawn distance of the autorod (30 mm). The 34 coolant channels in the upper axial reflector and the 33 coolant channels in the lower axial reflector were open. Additionally, the axial graphite fillers used in all other HTR-PROTEUS configurations to create a 12-sided core cavity were not used in the randomly packed cores. Instead, graphite fillers were placed on the cavity floor, creating a funnel-like base, to discourage ordering effects during pebble loading. Core 4 was determined to be acceptable benchmark experiment.

  4. RESEARCH ARTICLE The importance of reproductive strategies in population genetic

    E-Print Network [OSTI]

    Provan, Jim

    .V. 2007 Abstract Knowledge of the levels of genetic diversity maintained in natural populations can play of the last century. A test for heterozygote excess at five nuclear microsatellite loci did not suggest of between-population diversity suggest that all subpopulations can be treated as a single management unit

  5. HLA Genes in Populations of the Aleutian Islands

    E-Print Network [OSTI]

    Rey, Diego; Areces, Cristina; Parga-Lozano, Carlos; Gó mez-Prieto, Pablo; Crawford, Michael H.; Arnaiz-Villena, Antonio

    2010-10-01

    We typed a subset of the Aleut population for HLA loci (HLA-A, HLA-B, HLA-DRB1, HLA-DQB1) to obtain an HLA profile, which was compared to other Eurasian and Amerindian populations for studying Aleut origin and its significance ...

  6. Molecular population genetics and epidemiology of Ceratocystis fagacearum 

    E-Print Network [OSTI]

    Ivors, Kelly Lynn

    1995-01-01

    and the other population represented a sexually active disease center. Three polymorphic RFLP loci were found. Only one population, Willow Springs, had more than 1 allele present at the RFLP loci. Very low levels of variation (G = 1, 1, and 11.69) were detected...

  7. A Mesoscale Diffusion Model in Population Genetics with

    E-Print Network [OSTI]

    O'Leary, Michael

    ' & $ % A Mesoscale Diffusion Model in Population Genetics with Dynamic Fitness Mike O'Leary Towson University Judith R. Miller Georgetown University 1 #12;A mesoscale diffusion model in population genetics that dominance and epistasis are absent. April 28, 2005 Mike O'Leary and Judith Miller Slide 2 #12;A mesoscale

  8. RESEARCH Open Access Genetic variation and population structure of

    E-Print Network [OSTI]

    Jakobsson, Mattias

    representing different ethnic and linguistic groups. The combined power of exclusion (PE) was 0 was combined with previously published genotype data from Egypt, Somalia and the Karamoja population from populations. Individuals from northern Sudan clustered together with those from Egypt, and individuals from

  9. Fast population transfer engineering of three-level systems

    E-Print Network [OSTI]

    Xi Chen; J. G. Muga

    2012-07-12

    We design, by invariant-based inverse engineering, resonant laser pulses to perform fast population transfers in three-level systems. The efficiency and laser intensities are examined for different protocols. The energy cost to improve the fidelity is quantified. The laser intensities can be reduced by populating the intermediate state and by multi-mode driving.

  10. Mutualisms and Population Regulation: Mechanism Shalene Jha1

    E-Print Network [OSTI]

    Mutualisms and Population Regulation: Mechanism Matters Shalene Jha1 *, David Allen2 , Heidi Liere3 honeydew. Despite decades of research and the potential importance in pest control, the precise mechanism of a hemipteran population model, we show that the mechanism of the mutualism is direct, via improved hemipteran

  11. Sex-based population structure of ectoparasites from Neotropical bats

    E-Print Network [OSTI]

    Willig, Michael

    Sex-based population structure of ectoparasites from Neotropical bats STEVEN J. PRESLEY* Center by multiple evolutionary and ecological mechanisms, with natural selection affecting sex ratios as well as the distributions of each sex throughout the environment. To address sex-based aspects of population structure, I

  12. Public Health Principles and Practice Population Health Sciences 780

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Public Health Principles and Practice Population Health Sciences 780 Fall 2011 This course examines population-based approaches to improve the health of the public. The focus will be on learning methods for community health improvement--from assessment to finding and implementing evidence based public health

  13. Public Health Genomics Population Health Sciences 650 Section 023

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Public Health Genomics Population Health Sciences 650 Section 023 Summer 2009, 07/20/09 ­ 07: Public health genomics is a new discipline that uses knowledge gained from genetic and molecular research and improve the health of the population often by enacting health services, programs, and policies

  14. CONFIDENCE LIMITS FOR POPULATION PROJECTIONS WHEN VITAL RATES VARY RANDOMLY

    E-Print Network [OSTI]

    CONFIDENCE LIMITS FOR POPULATION PROJECTIONS WHEN VITAL RATES VARY RANDOMLY TIM GERRODE, age distribution, and vital rates are known (e.g., Leslie 1945; Keyfitz 1968). Such population rates are available. However, there is uncertainty in such projections. First, we rarely know vital

  15. 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

  16. 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

  17. 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

  18. 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

  19. Overshoot during phenotypic switching of cancer cell populations

    E-Print Network [OSTI]

    Sellerio, Alessandro L; Ben-Moshe, Noa Bossel; Coco, Stefania; Piccinini, Andrea; Myers, Christopher R; Sethna, James P; Giampietro, Costanza; Zapperi, Stefano; La Porta, Caterina A M

    2015-01-01

    The dynamics of tumor cell populations is hotly debated: do populations derive hierarchically from a subpopulation of cancer stem cells (CSCs), or are stochastic transitions that mutate differentiated cancer cells to CSCs important? Here we argue that regulation must also be important. We sort human melanoma cells using three distinct cancer stem cell (CSC) markers - CXCR6, CD271 and ABCG2 - and observe that the fraction of non-CSC-marked cells first overshoots to a higher level and then returns to the level of unsorted cells. This clearly indicates that the CSC population is homeostatically regulated. Combining experimental measurements with theoretical modeling and numerical simulations, we show that the population dynamics of cancer cells is associated with a complex miRNA network regulating the Wnt and PI3K pathways. Hence phenotypic switching is not stochastic, but is tightly regulated by the balance between positive and negative cells in the population. Reducing the fraction of CSCs below a threshold tr...

  20. The blue plume population in dwarf spheroidal galaxies: genuine blue stragglers or young stellar population?

    E-Print Network [OSTI]

    Y. Momany; E. V. Held; I. Saviane; S. Zaggia; L. Rizzi; M. Gullieuszik

    2007-04-11

    Abridged... Blue stragglers (BSS) are thought to be the product of either primordial or collisional binary systems. In the context of dwarf spheroidal galaxies it is hard to firmly disentangle a genuine BSS population from young main sequence (MS) stars tracing a ~1-2 Gyr old star forming episode. Assuming that their blue plume populations are made of BSS, we estimate the BSS frequency for 8 Local Group non star-forming dwarf galaxies, using a compilation of ground and space based photometry. Our results can be summarized as follows: (i) The BSS frequency in dwarf galaxies, at any given Mv, is always higher than that in globular clusters of similar luminosities; (ii) the BSS frequency for the lowest luminosity dwarf galaxies is in excellent agreement with that observed in the Milky Way halo; and most interestingly (iii) derive a statistically significant anti-correlation between the BSS frequency and the galaxy Mv. The low density, almost collision-less, environments of our dwarf galaxy sample allow us to infer (i) their very low dynamical evolution; (ii) a negligible production of collisional BSS; and consequently (iii) that their blue plumes are mainly made of primordial binaries. The dwarf galaxies anti-correlation can be used as a discriminator: galaxies obeying the anti-correlation are more likely to possess genuine primordial BSS rather than young main sequence stars.

  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. 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

  6. #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

  7. Theoretical Population Biology 69 (2006) 409418 The frequency of the perfect genotype in a population subject to

    E-Print Network [OSTI]

    Waxman, David

    2006-01-01

    contain a singular spike--a Dirac delta function-- corresponding to a non-zero proportion of the population, and the proportion of the population that have the optimal genotype. This is achieved for two is that the equilibrium distribution of genotypic effects is smooth and continuous. However, recent theoretical studies

  8. Genomics Populations for Characterization of Economically Important Traits Structured populations of beef cattle with extensive phenotypic records for economical-

    E-Print Network [OSTI]

    Genomics Populations for Characterization of Economically Important Traits Structured populations efficiency and carcass merit, are a critical need in the post-genome sequencing era. Coupled with the availability of the 7.5x assembly of the bovine genome sequence and the single nucleotide polymorphisms (SNP

  9. 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.

  10. Electricity Demand Evolution Driven by Storm Motivated Population Movement

    SciTech Connect (OSTI)

    Allen, Melissa R; Fernandez, Steven J; Fu, Joshua S; Walker, Kimberly A

    2014-01-01

    Managing the risks posed by climate change to energy production and delivery is a challenge for communities worldwide. Sea Level rise and increased frequency and intensity of natural disasters due to sea surface temperature rise force populations to move locations, resulting in changing patterns of demand for infrastructure services. Thus, Infrastructures will evolve to accommodate new load centers while some parts of the network are underused, and these changes will create emerging vulnerabilities. Combining climate predictions and agent based population movement models shows promise for exploring the universe of these future population distributions and changes in coastal infrastructure configurations. In this work, we created a prototype agent based population distribution model and developed a methodology to establish utility functions that provide insight about new infrastructure vulnerabilities that might result from these patterns. Combining climate and weather data, engineering algorithms and social theory, we use the new Department of Energy (DOE) Connected Infrastructure Dynamics Models (CIDM) to examine electricity demand response to increased temperatures, population relocation in response to extreme cyclonic events, consequent net population changes and new regional patterns in electricity demand. This work suggests that the importance of established evacuation routes that move large populations repeatedly through convergence points as an indicator may be under recognized.

  11. SECPOP90: Sector population, land fraction, and economic estimation program

    SciTech Connect (OSTI)

    Humphreys, S.L.; Rollstin, J.A.; Ridgely, J.N.

    1997-09-01

    In 1973 Mr. W. Athey of the Environmental Protection Agency wrote a computer program called SECPOP which calculated population estimates. Since that time, two things have changed which suggested the need for updating the original program - more recent population censuses and the widespread use of personal computers (PCs). The revised computer program uses the 1990 and 1992 Population Census information and runs on current PCs as {open_quotes}SECPOP90.{close_quotes} SECPOP90 consists of two parts: site and regional. The site provides population and economic data estimates for any location within the continental United States. Siting analysis is relatively fast running. The regional portion assesses site availability for different siting policy decisions; i.e., the impact of available sites given specific population density criteria within the continental United States. Regional analysis is slow. This report compares the SECPOP90 population estimates and the nuclear power reactor licensee-provided information. Although the source, and therefore the accuracy, of the licensee information is unknown, this comparison suggests SECPOP90 makes reasonable estimates. Given the total uncertainty in any current calculation of severe accidents, including the potential offsite consequences, the uncertainty within SECPOP90 population estimates is expected to be insignificant. 12 refs., 55 figs., 7 tabs.

  12. 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

  13. Heroin Users in Australia: Population Trends C. Yalin Kaya1

    E-Print Network [OSTI]

    Kaya, Yalcin

    was the largest per capita consumer of heroin in the western world during the 1930s and in 1953 (Campbell 2001 of its high prevalence, rate of growth and the consequent social cost. It is important to carry out

  14. 2.5 Autonomous Equations and Population Dynamics 89

    E-Print Network [OSTI]

    (c) Solve Eq. (i) subject to the initial condition y(0) = yo and con?rm the conclusions reached in part (b). (a) (b) -. - FIGURE 2.5.8 Logistic growth with a threshold: ...

  15. 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

  16. 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

  17. 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.

  18. Long-term projections of national, regional, and state population

    SciTech Connect (OSTI)

    McDonald, J.F.; South, D.W.

    1986-07-01

    The projections prepared by the US Bureau of the Census are the best available projections of total US population. The DRI projections of population at the regional and state level to the year 2008 are the best available and are consistent with the US Bureau of the Census projections of total US population. The DRI regional and state projections can be extended from 2008 to 2030 with a simple model based on economic opportunity, although an even simpler model - constant shares - is used for the 1985 test runs. The US Bureau of the Census prepares the best available projections of the US age-sex distribution.

  19. 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.

  20. 2007 TY430: A COLD CLASSICAL KUIPER BELT TYPE BINARY IN THE PLUTINO POPULATION

    SciTech Connect (OSTI)

    Sheppard, Scott S.; Ragozzine, Darin; Trujillo, Chadwick

    2012-03-15

    Kuiper Belt object 2007 TY430 is the first wide, equal-sized, binary known in the 3:2 mean motion resonance with Neptune. The two components have a maximum separation of about 1 arcsec and are on average less than 0.1 mag different in apparent magnitude with identical ultra-red colors (g - i = 1.49 {+-} 0.01 mag). Using nearly monthly observations of 2007 TY430 from 2007 to 2011, the orbit of the mutual components was found to have a period of 961.2 {+-} 4.6 days with a semi-major axis of 21000 {+-} 160 km and eccentricity of 0.1529 {+-} 0.0028. The inclination with respect to the ecliptic is 15.68 {+-} 0.22 deg and extensive observations have allowed the mirror orbit to be eliminated as a possibility. The total mass for the binary system was found to be 7.90 {+-} 0.21 Multiplication-Sign 10{sup 17} kg. Equal-sized, wide binaries and ultra-red colors are common in the low-inclination 'cold' classical part of the Kuiper Belt and likely formed through some sort of three-body interactions within a much denser Kuiper Belt. To date 2007 TY430 is the only ultra-red, equal-sized binary known outside of the classical Kuiper Belt population. Numerical simulations suggest 2007 TY430 is moderately unstable in the outer part of the 3:2 resonance and thus 2007 TY430 is likely an escaped 'cold' classical object that later got trapped in the 3:2 resonance. Similar to the known equal-sized, wide binaries in the cold classical population, the binary 2007 TY430 requires a high albedo and very low density structure to obtain the total mass found for the pair. For a realistic minimum density of 0.5 g cm{sup -3} the albedo of 2007 TY430 would be greater than 0.17. For reasonable densities, the radii of either component should be less than 60 km, and thus the relatively low eccentricity of the binary is interesting since no tides should be operating on the bodies at their large distances from each other. The low prograde inclination of the binary also makes it unlikely that the Kozai mechanism could have altered the orbit, making the 2007 TY430 binary orbit likely one of the few relatively unaltered primordial binary orbits known. Under some binary formation models, the low-inclination prograde orbit of the 2007 TY430 binary indicates formation within a relatively high velocity regime in the Kuiper Belt.

  1. Projections of highway vehicle population, energy demand, and CO{sub 2} emissions in India through 2040.

    SciTech Connect (OSTI)

    Arora, S.; Vyas, A.; Johnson, L.; Energy Systems

    2011-02-22

    This paper presents projections of motor vehicles, oil demand, and carbon dioxide (CO{sub 2}) emissions for India through the year 2040. The populations of highway vehicles and two-wheelers are projected under three different scenarios on the basis of economic growth and average household size in India. The results show that by 2040, the number of highway vehicles in India would be 206-309 million. The oil demand projections for the Indian transportation sector are based on a set of nine scenarios arising out of three vehicle-growth and three fuel-economy scenarios. The combined effects of vehicle-growth and fuel-economy scenarios, together with the change in annual vehicle usage, result in a projected demand in 2040 by the transportation sector in India of 404-719 million metric tons (8.5-15.1 million barrels per day). The corresponding annual CO{sub 2} emissions are projected to be 1.2-2.2 billion metric tons.

  2. 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

  3. Dietary fat modulation of mammary tumor growth and metabolism demonstrated by /sup 31/P-nuclear magnetic resonance

    SciTech Connect (OSTI)

    Erickson, K.L.; Buckman, D.K.; Hubbard, N.E.; Ross, B.

    1986-03-05

    The relationship of dietary fat concentration and saturation on the growth and metabolic activity of line 168 was studied using syngeneic mice fed 6 experimental diets before and during tumor growth. Tumor latency was significantly greater for mice fed a diet containing the minimum of essential fatty acids (EFA, 0.5% corn oil) or 8% coconut oil (SF) than for mice fed 8 or 20% safflower oil (PUF) or 20% SF. Changes in dietary fat resulted in alterations of tumor cell and serum fatty acid composition but not the number of inflammatory cells infiltrating the tumor. /sup 31/P-surface coil NMR was used to measure possible changes in tumor metabolism in vivo. Although pH decreased from 7.2 to 6.6 as the tumor volume increased, there was no difference in pH among dietary groups. There was an inverse relationship between both sugar phosphate (SP)/Pi and ATP/Pi ratios and tumor volume; those ratios for mice fed an EFA deficient or minimal EFA diet decreased at a different rate than ratios for mice fed diets with additional fat. Tumors of mice fed diets containing no or a low level (0.3%) of 18:2 had higher SP/ATP ratios than mice fed diets containing a moderate level (approx. 4%) of 18:2. Thus, high levels of dietary fat had a significant effect on promotion of mammary tumors during early stages of tumor growth. Differences in tumor volume associated with dietary fat may be related to changes in the levels of high energy phosphate metabolites.

  4. Population dynamics, production, and prey consumption of fathead minnows (Pimephales

    E-Print Network [OSTI]

    ) in prairie wetlands: a bioenergetics approach W.G. Duffy Abstract: I assessed the population dynamics of fathead minnows (Pimephales promelas) in prairie wetlands and developed a bioenergetics model to estimate

  5. Optimal Urban Population Size: National vs Local Economic Efficiency

    E-Print Network [OSTI]

    Nam, Kyung-min

    This paper explores whether the population size of the Seoul Metropolitan Area (SMA) in Korea is efficient in terms of the national economy. To undertake this analysis, a recursively dynamic interregional computable general ...

  6. Population SAMC, ChIP-chip Data Analysis and Beyond 

    E-Print Network [OSTI]

    Wu, Mingqi

    2011-02-22

    This dissertation research consists of two topics, population stochastics approximation Monte Carlo (Pop-SAMC) for Baysian model selection problems and ChIP-chip data analysis. The following two paragraphs give a brief introduction to each...

  7. Environmental influences on largemouth bass Micropterus salmoides populations in shallow

    E-Print Network [OSTI]

    ). Vegetation coverage of lakes plays a vital role in the population dynamics of largemouth bass (Aggus & Elliot), and too little coverage apparently is linked to low recruitment in some waters (Aggus & Elliot 1975

  8. Sandia Energy - CFD-Populated Empirical Turbine Wake Model

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

    parameters that effect tidal turbine wakes, such as yaw angle to incident flow and vertical blockage ratio, may be incorporated as part of future revisions of the CFD populated...

  9. Distance sampling and the challenge of monitoring butterfly populations

    E-Print Network [OSTI]

    Shuker, David

    Distance sampling and the challenge of monitoring butterfly populations Nick J. B. Isaac110 5DD, UK; 5 Institute for Environment, Sustainability and Regeneration, Mellor Building Monitoring Scheme (UKBMS) have been influential in informing our understanding of environmental change

  10. Ecology and population structure of vibrionaceae in the coastal ocean

    E-Print Network [OSTI]

    Preheim, Sarah Pacocha

    2010-01-01

    Extensive genetic diversity has been discovered in the microbial world, yet mechanisms that shape and maintain this diversity remain poorly understood. This thesis investigates to what extent populations of the ...

  11. Disease resistance and performance of blended populations of creepi 

    E-Print Network [OSTI]

    Abernathy, Scott David

    1999-01-01

    Plant diseases are a major problem on creeping bentgrass greens and can significantly decrease putting quality. Blended populations comprised of two or more cultivars within the same species have been utilized to decrease disease development...

  12. Optimal control of population transfer in Markovian open quantum systems

    E-Print Network [OSTI]

    Wei Cui; Zairong Xi; Yu Pan

    2010-04-27

    There has long been interest to control the transfer of population between specified quantum states. Recent work has optimized the control law for closed system population transfer by using a gradient ascent pulse engineer- ing algorithm [1]. Here, a spin-boson model consisting of two-level atoms which interact with the dissipative environment, is investigated. With opti- mal control, the quantum system can invert the populations of the quantum logic states. The temperature plays an important role in controlling popula- tion transfer. At low temperatures the control has active performance, while at high temperatures it has less erect. We also analyze the decoherence be- havior of open quantum systems with optimal population transfer control, and we find that these controls can prolong the coherence time. We hope that active optimal control can help quantum solid-state-based engineering.

  13. Export-Oriented Populism: Commodities and Coalitions in Argentina

    E-Print Network [OSTI]

    Richardson, Neal P.

    2009-01-01

    experience: Natural resource export structures and the255 DOI 10.1007/s12116-008-9037-5 Export-Oriented Populism:benefits for urban workers with export promotion, emerged in

  14. Causes and consequences of sexual selection in a wild population 

    E-Print Network [OSTI]

    Stopher, Katie Vivienne

    2011-11-24

    heterogeneity on selection. Further, important questions remain about the consequences of sexual selection for genetic structuring and genetic variation within populations. In this thesis, I investigate the causes and consequences of sexual selection in a...

  15. POPULATION ECOLOGY Dispersal of the Eucalyptus Longhorned Borer (Coleoptera

    E-Print Network [OSTI]

    Hanks, Lawrence M.

    POPULATION ECOLOGY Dispersal of the Eucalyptus Longhorned Borer (Coleoptera: Cerambycidae) in Urban behavior of the eucalyptus longhorned borer, Phoracantha semipunctata (F.), a crepuscular beetle whose distributed in time and space. KEY WORDS Phoracantha semipunctata, Cerambycidae, eucalyptus, wood boring

  16. Extinction dynamics of a discrete population in an oasis

    E-Print Network [OSTI]

    Berti, Stefano; Vergni, Davide; Vulpiani, Angelo

    2015-01-01

    Understanding the conditions ensuring the persistence of a population is an issue of primary importance in population biology. The first theoretical approach to the problem dates back to the 50's with the KiSS (after Kierstead, Slobodkin and Skellam) model, namely a continuous reaction-diffusion equation for a population growing on a patch of finite size $L$ surrounded by a deadly environment with infinite mortality -- i.e. an oasis in a desert. The main outcome of the model is that only patches above a critical size allow for population persistence. Here, we introduce an individual-based analogue of the KiSS model to investigate the effects of discreteness and demographic stochasticity. In particular, we study the average time to extinction both above and below the critical patch size of the continuous model and investigate the quasi-stationary distribution of the number of individuals for patch sizes above the critical threshold.

  17. Tephrochronology, landscape and population: impacts of plague on medieval Iceland 

    E-Print Network [OSTI]

    Streeter, Richard Thomas

    2012-06-25

    This thesis examines the extent to which geomorphological change in sub-arctic landscapes may be driven by rapid declines in population over timescales of decades to centuries. Demographic decline driven by disease in ...

  18. Analysis of high-density SNP data from complex populations 

    E-Print Network [OSTI]

    Floyd, James A.B.

    2011-06-27

    Data from a Croatian isolate population are analysed in a genome-wide association study (GWAS) for a variety of disease-related quantitative traits. A novel genomewide approach to analysing pedigree-based association ...

  19. Genetic Evidence for Recent Population Mixture in India

    E-Print Network [OSTI]

    Moorjani, Priya

    Most Indian groups descend from a mixture of two genetically divergent populations: Ancestral North Indians (ANI) related to Central Asians, Middle Easterners, Caucasians, and Europeans; and Ancestral South Indians (ASI) ...

  20. GIS Training Program for Population Scientists—NICHD Proposal

    E-Print Network [OSTI]

    Matthews, Stephen A.; Population Research Institute, Pennsylvania State University, and the Center for Spatially Integrated Social Science, UC Santa Barbara

    2004-01-01

    NICHD R-25 proposal 2004 GIS Training for PopulationSara L. McLafferty. 2002. GIS and Public Health. New York:1994. Spatial Analysis and GIS. Bristol, PA: Taylor and

  1. Tool investigates population, climate impacts on global water...

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

    climate and popu-lation data sources and develop prelimi-nary per capita water availability projec-tions at a global scale," said Esther Parish of the Oak Ridge National...

  2. Reading out population codes with a matched filter 

    E-Print Network [OSTI]

    van Rossum, Mark; Renart, Alfonso; Nelson, Sacha; Wang, X.-J.; Turrigiano, Gina G.

    2001-01-01

    We study the optimal way to decode information present in a population code. Using a matched filter, the performance in Gaussian additive noise is as good as the theoretical maximum. The scheme can be applied when ...

  3. Predicting Agent Strategy Mix of Evolving Populations Sabyasachi Saha

    E-Print Network [OSTI]

    Sen, Sandip

    Predicting Agent Strategy Mix of Evolving Populations Sabyasachi Saha Department of Math & Computer Science The University of Tulsa sabyasachi-saha@utulsa.edu Sandip Sen Department of Math & Computer

  4. 5.5-7.5 MeV Proton Generation by a Moderate-Intensity Ultrashort-Pulse Laser Interaction with H{sub 2}O Nanowire Targets

    SciTech Connect (OSTI)

    Zigler, A.; Palchan, T.; Bruner, N.; Schleifer, E.; Eisenmann, S.; Botton, M.; Henis, Z. [Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel); Pikuz, S. A.; Faenov, A. Y. Jr. [Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow (Russian Federation); Gordon, D.; Sprangle, P. [Plasma Physics Division, Naval Research Laboratory, Washington, D.C. 20375 (United States)

    2011-04-01

    We report on the first generation of 5.5-7.5 MeV protons by a moderate-intensity short-pulse laser ({approx}5x10{sup 17} W/cm{sup 2}, 40 fsec) interacting with frozen H{sub 2}O nanometer-size structure droplets (snow nanowires) deposited on a sapphire substrate. In this setup, the laser intensity is locally enhanced by the snow nanowire, leading to high spatial gradients. Accordingly, the nanoplasma is subject to enhanced ponderomotive potential, and confined charge separation is obtained. Electrostatic fields of extremely high intensities are produced over the short scale length, and protons are accelerated to MeV-level energies.

  5. 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.

  6. 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.

  7. 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.

  8. 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.

  9. 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.

  10. Characteristics and Changes in the Texas Farm Population

    E-Print Network [OSTI]

    Skrabanek, R. L.

    1955-01-01

    in the same direction as in the nation and the West South Central division, comprising Arkansas, Louisiana, Oklahoma and Texas. Before 1937, the State's farm population did not decline as rapidly as in the nation or West South Central division. Since 1945... is more important numerically than the city population. In 30 counties, more than 50 percent of the people were classified as rural farm residents in 1950. In 85 counties, more than 40 percent of the people were similarly classified. Nonwhites comprised...

  11. Genetic analysis in the Collaborative Cross breeding population

    SciTech Connect (OSTI)

    Philip, Vivek [University of Tennessee, Knoxville (UTK); Sokoloff, Greta [ORNL; Ackert-Bicknell, Cheryl [Jackson Laboratory, The, Bar Harbor, ME; Striz, Martin [University of Kentucky, Lexington; Branstetter, Lisa R [ORNL; Beckmann, Melissa [ORNL; Spence, Jason S [ORNL; Jackson, Barbara L [ORNL; Galloway, Leslie D [ORNL; Barker, Gene [ORNL; Wymore, Ann M [Oak Ridge National Laboratory (ORNL); Hunsicker, Patricia R [ORNL; Durtschi, David W [University of Kentucky, Lexington; Shaw, Ginger S [University of Kentucky, Lexington; Shinpock, Sarah G [ORNL; Manly, Kenneth F [University of Kentucky, Lexington; Miller, Darla R [ORNL; Donahue, Kevin [University at Buffalo, NY; Culiat, Cymbeline T [ORNL; Churchill, Gary A [Jackson Laboratory, The, Bar Harbor, ME; Lariviere, William R [University of Pittsburgh; Palmer, Abraham [University of Chicago; O'Hara, Bruce [University of Kentucky; Voy, Brynn H [ORNL; Chesler, Elissa J [ORNL

    2011-01-01

    Genetic reference populations in model organisms are critical resources for systems genetic analysis of disease related phenotypes. The breeding history of these inbred panels may influence detectable allelic and phenotypic diversity. The existing panel of common inbred strains reflects historical selection biases, and existing recombinant inbred panels have low allelic diversity. All such populations may be subject to consequences of inbreeding depression. The Collaborative Cross (CC) is a mouse reference population with high allelic diversity that is being constructed using a randomized breeding design that systematically outcrosses eight founder strains, followed by inbreeding to obtain new recombinant inbred strains. Five of the eight founders are common laboratory strains, and three are wild-derived. Since its inception, the partially inbred CC has been characterized for physiological, morphological, and behavioral traits. The construction of this population provided a unique opportunity to observe phenotypic variation as new allelic combinations arose through intercrossing and inbreeding to create new stable genetic combinations. Processes including inbreeding depression and its impact on allelic and phenotypic diversity were assessed. Phenotypic variation in the CC breeding population exceeds that of existing mouse genetic reference populations due to both high founder genetic diversity and novel epistatic combinations. However, some focal evidence of allele purging was detected including a suggestive QTL for litter size in a location of changing allele frequency. Despite these inescapable pressures, high diversity and precision for genetic mapping remain. These results demonstrate the potential of the CC population once completed and highlight implications for development of related populations. Supplementary material consists of Supplementary Table 1 Phenotypic means, variances, ranges and heritabilities for all traits and generations, Supplementary Table 2, all phenotypic values, Supplementary Table 3, multiple QTL mapping.

  12. Assessment and Corrective Management for Fish Populations in Small Impoundments. 

    E-Print Network [OSTI]

    Anonymous,

    1985-01-01

    to the pondowner for correcting unbalanced or undesirable fish populations. These include renovation, harvest manipu lation and supplemental stocking. However, if unsatisfactory fish populations are a result of poor water quality, improper pond design or an over...-abundance of aquatic vegetation, the suggested corrective techniques alone may not be successful. Renovation Total renovation using rotenone should be considered for a farm pond if species such as gar, bowfin, flathead catfish, chain pickerel, black bullheads...

  13. Inflation with moderately sharp features in the speed of sound: GSR and in-in formalism for power spectrum and bispectrum

    E-Print Network [OSTI]

    Ana Achucarro; Vicente Atal; Bin Hu; Pablo Ortiz; Jesus Torrado

    2015-10-16

    We continue the study of mild transient reductions in the speed of sound of the adiabatic mode during inflation, of their effect on the primordial power spectrum and bispectrum, and of their detectability in the Cosmic Microwave Background (CMB). We focus on the regime of \\emph{moderately sharp} mild reductions in the speed of sound during uninterrupted slow-roll inflation, a theoretically well motivated and self-consistent regime that admits an effective single-field description. The signatures on the power spectrum and bispectrum were previously computed using a slow-roll Fourier transform (SRFT) approximation, and here we compare it with generalized slow-roll (GSR) and in-in methods, for which we derive new formulas that account for moderately sharp features. The agreement between them is excellent, and also with the power spectrum obtained from the numerical solution to the equation of motion. We show that, in this regime, the SRFT approximation correctly captures with simplicity the effect of higher derivatives of the speed of sound in the mode equation, and makes manifest the correlations between power spectrum and bispectrum features. In a previous paper we reported hints of these correlations in the Planck data and here we perform several consistency checks and further analyses of the best fits, such as polarization and local significance at different angular scales. For the data analysis, we show the excellent agreement between the CLASS and CAMB Boltzmann codes. Our results confirm that the theoretical framework is consistent, and they suggest that the predicted correlations are robust enough to be searched for in CMB and Large Scale Structure (LSS) surveys.

  14. 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.

  15. Stellar Populations and Surface Brightness Fluctuations: New Observations and Models

    E-Print Network [OSTI]

    John P. Blakeslee; Alexandre Vazdekis; Edward A. Ajhar

    2000-08-15

    We examine the use of surface brightness fluctuations (SBF) for both stellar population and distance studies. New V-band SBF data are reported for five Fornax cluster galaxies and combined with literature data to define a new V-band SBF distance indicator. We use new stellar population models, based on the latest Padua isochrones transformed empirically to the observational plane, to predict SBF magnitudes and integrated colours for a wide range of population ages and metallicities. We examine the sensitivity of the predictions to changes in the isochrones, transformations, and IMF. The new models reproduce the SBF data for globular clusters fairly well, especially if higher metallicity globulars are younger. The models also give a good match to the "fluctuation colors" of elliptical galaxies. In order to obtain theoretical calibrations of the SBF distance indicators, we combine our single-burst models into composite population models. These models reproduce the observed behavior of the SBF magnitudes as a function of stellar population parameters, including the steep colour dependence found for HST/WFPC2 F814W SBF data. Because the theoretical SBF calibrations are fairly sensitive to uncertain details of stellar evolution, the empirical calibrations are more secure. However, the sensitivity of SBF to these finer details potentially makes it a powerful constraint for stellar evolution and population synthesis. [abbridged

  16. 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...

  17. 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:...

  18. 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...

  19. 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...

  20. 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...

  1. 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.

  2. 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”,

  3. 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.

  4. 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...

  5. 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.

  6. 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

  7. 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...

  8. 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...

  9. 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 -...

  10. 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],

  11. From Single-Cell Genetic Architecture to Cell Population Dynamics: Quantitatively Decomposing the Effects of Different Population

    E-Print Network [OSTI]

    Bernard, Samuel

    From Single-Cell Genetic Architecture to Cell Population Dynamics: Quantitatively Decomposing Architecture Nikos V. Mantzaris Department of Chemical and Biomolecular Engineering, Rice University, Houston with positive feedback architecture. The framework consists of three vastly different mathematical formulations

  12. Population genomics: Whole-genome analysis of polymorphism and divergence in Drosophila simulans

    E-Print Network [OSTI]

    2007-01-01

    PLoS BIOLOGY Population Genomics: Whole-Genome Analysis ofwww.plosbiology.org Population Genomics of D. simulans Table11 | e310 Population Genomics of D. simulans Table S15. GO

  13. Comparisons of Access to, Cost of, and Quality of Health Care Between Rural and Urban Populations 

    E-Print Network [OSTI]

    Lee, Wei-Chen

    2013-12-06

    There are 46.2 million Americans (15% of total population) living in rural counties. Rural populations disproportionately suffer from inadequate access to, high cost of, and poor quality of health services compared to urban populations. Furthermore...

  14. Effects of Supplemental Food on Population Dynamics of Cotton Rats, Sigmodon Hispidus

    E-Print Network [OSTI]

    Doonan, Terry J.; Slade, Norman A.

    1995-04-01

    Variation in resource abundance affects population dynamics by altering demographic processes and interactions among individuals in the population. For small mammals, food is likely to be a critical resource. Population ...

  15. Dose reconstruction for the Urals population. Joint Coordinating Committee on Radiation Effects Research, Project 1.1 -- Final report

    SciTech Connect (OSTI)

    Degteva, M.O.; Drozhko, E.; Anspaugh, L.R.; Napier, B.A.; Bouville, A.C.; Miller, C.W.

    1996-02-01

    This work is being carried out as a feasibility study to determine if a long-term course of work can be implemented to assess the long-term risks of radiation exposure delivered at low to moderate dose rates to the populations living in the vicinity of the Mayak Industrial Association (MIA). This work was authorized and conducted under the auspices of the US-Russian Joint Coordinating Committee on Radiation Effects Research (JCCRER) and its Executive Committee (EC). The MIA was the first Russian site for the production and separation of plutonium. This plant began operation in 1948, and during its early days there were technological failures that resulted in the release of large amounts of waste into the rather small Techa River. There were also gaseous releases of radioiodines and other radionuclides during the early days of operation. In addition, there was an accidental explosion in a waste storage tank in 1957 that resulted in a significant release. The Techa River Cohort has been studied for several years by scientists from the Urals Research Centre for Radiation Medicine and an increase in both leukemia and solid tumors has been noted.

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  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. 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

  3. Original article Effects of arginine, growth hormone-releasing

    E-Print Network [OSTI]

    Boyer, Edmond

    release of ARG (1 g/kg body weight, infused between times-15 and -5 min), growth hormone-releasing hormone Growth hormone (GH) secretion is regu- lated by many factors including nutrients. Arginine (ARG) infused infusions of ARG can stimulate GH secre- tion in lambs (Davenport et al, 1990a, 1995), adult sheep

  4. Export sophistication and economic growth: evidence from China

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Export sophistication and economic growth: evidence from China Joachim Jarreau PSE CEPII sandra halshs-00962593,version1-21Mar2014 #12;Export Sophistication and Economic Growth: evidence from China Joachim Jarreau and Sandra Poncet January 4, 2011 Abstract We consider the effect of export sophistication

  5. Internet traffic growth: Sources and implications Andrew M. Odlyzko

    E-Print Network [OSTI]

    Odlyzko, Andrew M.

    Internet traffic growth: Sources and implications Andrew M. Odlyzko University of Minnesota, Minneapolis, MN, USA ABSTRACT The high tech bubble was inflated by myths of astronomical Internet traffic growth rates. Yet although these myths were false, Internet traffic was increasing very rapidly, close

  6. Energy and Water Scarcity: Impacts on Infrastructure, Growth and

    E-Print Network [OSTI]

    Scott, Christopher

    Techno-economic Evaluation Of A Solar Powered Water Desalination Plant. In L. Rizzuti et al. (edsEnergy and Water Scarcity: Impacts on Infrastructure, Growth and Economic Development in Arizona Demand AZ 2030 * Phoenix 2005; **Tucson 2005; 150=smart growth +66% +53% +45% From 2006 base #12;Water

  7. Cellular oscillations and the regulation of growth: the

    E-Print Network [OSTI]

    Kunkel, Joseph G.

    Cellular oscillations and the regulation of growth: the pollen tube paradigm Jose A. Feijo ,1. There is evidence that these cellular oscillators involve an integrated input of plasma membrane ion fluxes for the study of growth and morphogenesis at the cellular level. Being the carriers of male gametes in all

  8. The growth of business firms: Theoretical framework and empirical evidence

    E-Print Network [OSTI]

    Buldyrev, Sergey

    Pg(g) of business-firm growth rates. The model pre- dicts that Pg(g) is exponential in the central rate at all levels of aggregation studied. The Theoretical Framework We model business firms as classesThe growth of business firms: Theoretical framework and empirical evidence Dongfeng Fu* , Fabio

  9. RESEARCH Open Access Simultaneous cell growth and ethanol production

    E-Print Network [OSTI]

    Chen, Wilfred

    RESEARCH Open Access Simultaneous cell growth and ethanol production from cellulose steps to their practical usage for ethanol production. Ideally, a recombinant microorganism, possessing the capability to utilize cellulose for simultaneous growth and ethanol production, is of great interest. We have

  10. Rapid Scan Humidified Growth Cloud Condensation Nuclei Counter

    SciTech Connect (OSTI)

    Gregory L. Kok; Athanasios Nenes

    2013-03-13

    This research focused on enhancements to the streamwise thermal gradient cloud condensation nuclei counter to support the rapid scan mode and to enhance the capability for aerosol humidified growth measurements. The research identified the needs for flow system modifications and range of capability for operating the conventional instrument in the rapid scan and humidified growth modes.

  11. The Magellanic Bridge: The Nearest Purely Tidal Stellar Population

    E-Print Network [OSTI]

    Jason Harris

    2006-12-04

    We report on observations of the stellar populations in twelve fields spanning the region between the Magellanic Clouds, made with the Mosaic-II camera on the 4-meter telescope at the Cerro-Tololo Inter-American Observatory. The two main goals of the observations are to characterize the young stellar population (which presumably formed in situ in the Bridge and therefore represents the nearest stellar population formed from tidal debris), and to search for an older stellar component (which would have been stripped from either Cloud as stars, by the same tidal forces which formed the gaseous Bridge). We determine the star-formation history of the young inter-Cloud population, which provides a constraint on the timing of the gravitational interaction which formed the Bridge. We do not detect an older stellar population belonging to the Bridge in any of our fields, implying that the material that was stripped from the Clouds to form the Magellanic Bridge was very nearly a pure gas.

  12. World pipeline work set for rapid growth

    SciTech Connect (OSTI)

    Not Available

    1992-08-01

    This paper reports on international pipeline construction which has entered a fast-growth period, accelerated by the new political and economic realities around the world and increasing demand for natural gas, crude oil and refined petroleum products. Many projects are under way or in planning for completion in the mid- to late 1990s in Europe, South America, Asia and the Middle East. Pipeline And Gas Journal's projection calls for construction or other work on 30,700 miles of new natural gas, crude oil and refined products pipelines in the 1992-93 period outside Canada and the U.S. These projects will cost an estimated $30 billion-plus. Natural gas pipelines will comprise most of the mileage, accounting for almost 23,000 miles at an estimated cost of $26.3 billion. Products pipelines, planned or under construction, will add another 5,800 miles at a cost of $2.8 billion. Crude oil pipelines, at a minimum, will total 1,900 new miles at a cost of slightly under $1 billion.

  13. Technology, enterprise, and American economic growth

    SciTech Connect (OSTI)

    Lewis, J.D.

    1982-03-05

    America may have once led the world in economic development based on technology, but US firms are no longer matching foreign competitors in either the domestic or world markets. Mr. Lewis feels that much of the US supremacy was a post-war phenomenon due to European refugee scientists. Economic and technological strength are more fundamental than deregulation, low expenditures for research and development, lack of capital and long-range planning, and other arguments that, if reversed, would revitalize American industry. The author reviews the relationship of technology and economic growth, pointing out that Japanese industry has faced many of the same problems with different behavior patterns. The variations in behavior due to differences in social values, priorities, and attitudes affect individual performance and response to innovation. Inflation increases the pressure for short-term gains and encourages analytical management. Mr. Lewis thinks that, for international competition to move Americans to develop a sense of common interest between labor and management and producer and consumer, industry must lead the effort to unmask the adversarial barriers to mutual trust. 52 references, 1 figure, 3 tables. (DCK)

  14. Table HC1-7a. Housing Unit Characteristics by Four Most Populated...

    Gasoline and Diesel Fuel Update (EIA)

    Housing Unit Characteristics by Four Most Populated States, Million U.S. Households, 2001 Housing Unit Characteristics RSE Column Factor: Total U.S. Four Most Populated States...

  15. BUILDING A UNITED STATES DATA BASE: POPULATIONS AT RISK TO ENVIRONMENTAL POLLUTION

    E-Print Network [OSTI]

    Sacks, Susan T.

    2014-01-01

    BUILDING A UNITED STATES DATA BASE: POPULATIONS AT RISK TOBUILDING A UNITED STATES DATA BASE: POPULATIONS AT RISK TOof an demographic integrated data base characteristics, air

  16. Growth Rates of Global Energy Systems and Future Outlooks

    SciTech Connect (OSTI)

    Hoeoek, Mikael; Li, Junchen; Johansson, Kersti; Snowden, Simon

    2012-03-15

    The world is interconnected and powered by a number of global energy systems using fossil, nuclear, or renewable energy. This study reviews historical time series of energy production and growth for various energy sources. It compiles a theoretical and empirical foundation for understanding the behaviour underlying global energy systems' growth. The most extreme growth rates are found in fossil fuels. The presence of scaling behaviour, i.e. proportionality between growth rate and size, is established. The findings are used to investigate the consistency of several long-range scenarios expecting rapid growth for future energy systems. The validity of such projections is questioned, based on past experience. Finally, it is found that even if new energy systems undergo a rapid 'oil boom'-development-i.e. they mimic the most extreme historical events-their contribution to global energy supply by 2050 will be marginal.

  17. Guidance system for low angle silicon ribbon growth

    DOE Patents [OSTI]

    Jewett, David N. (Harvard, MA); Bates, Herbert E. (Ashby, MA); Milstein, Joseph B. (Denver, CO)

    1986-07-08

    In a low angle silicon sheet growth process, a puller mechanism advances a seed crystal and solidified ribbon from a cooled growth zone in a melt at a low angle with respect to the horizontal. The ribbon is supported on a ramp adjacent the puller mechanism. Variations in the vertical position of the ribbon with respect to the ramp are isolated from the growth end of the ribbon by (1) growing the ribbon so that it is extremely thin, preferably less than 0.7 mm, (2) maintaining a large growth zone, preferably one whose length is at least 5.0 cm, and (3) spacing the ramp from the growth zone by at least 15 cm.

  18. String stabilized ribbon growth a method for seeding same

    DOE Patents [OSTI]

    Sachs, Emanuel M. (39 Harding Ave., Belmont, MA 02178)

    1987-08-25

    This invention is a method of initiating or seeding the growth of a crystalline or polycrystalline ribbon by the String Stabilized Ribbon Growth Method. The method for seeding the crystal growth comprises contacting a melt surface with a seed and two strings used in edge stabilization. The wetted strings attach to the wetted seed as a result of the freezing of the liquid melt. Upon drawing the seed, which is attached to the strings, away from the melt surface a melt liquid meniscus, a seed junction, and a growth interface forms. Further pulling of the attached seed causes a crystal ribbon to grow at the growth interface. The boundaries of the growing ribbon are: at the top the seed junction, at the bottom the freezing boundary of the melt liquid meniscus, and at the edges frozen-in strings.

  19. 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.

  20. Real-Time Bioluminescent Tracking of Cellular Population Dynamics

    SciTech Connect (OSTI)

    Close, Dan; Sayler, Gary Steven; Xu, Tingting; Ripp, Steven Anthony

    2014-01-01

    Cellular population dynamics are routinely monitored across many diverse fields for a variety of purposes. In general, these dynamics are assayed either through the direct counting of cellular aliquots followed by extrapolation to the total population size, or through the monitoring of signal intensity from any number of externally stimulated reporter proteins. While both viable methods, here we describe a novel technique that allows for the automated, non-destructive tracking of cellular population dynamics in real-time. This method, which relies on the detection of a continuous bioluminescent signal produced through expression of the bacterial luciferase gene cassette, provides a low cost, low time-intensive means for generating additional data compared to alternative methods.