Sample records for age excludes systems

  1. National Environmental Policy Act (NEPA) Categorically Excluded...

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

    Environmental Management System NEPA National Environmental Policy Act (NEPA) Categorically Excluded Actions National Environmental Policy Act (NEPA) Categorically Excluded...

  2. Transportation, Aging and Disposal Canister System Performance...

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

    This document provides specifications for selected system components of the Transportation, Aging and Disposal (TAD) canister-based system. Transportation, Aging and Disposal...

  3. SNF AGING SYSTEM DESCRIPTION DOCUMENT

    SciTech Connect (OSTI)

    L.L. Swanson

    2005-04-06T23:59:59.000Z

    The purpose of this system description document (SDD) is to establish requirements that drive the design of the spent nuclear fuel (SNF) aging system and associated bases, which will allow the design effort to proceed. This SDD will be revised at strategic points as the design matures. This SDD identifies the requirements and describes the system design, as it currently exists, with emphasis on attributes of the design provided to meet the requirements. This SDD is an engineering tool for design control; accordingly, the primary audience and users are design engineers. This SDD is part of an iterative design process. It leads the design process with regard to the flow down of upper tier requirements onto the system. Knowledge of these requirements is essential in performing the design process. The SDD follows the design with regard to the description of the system. The description provided in the SDD reflects the current results of the design process. Throughout this SDD, the term aging cask applies to vertical site-specific casks and to horizontal aging modules. The term overpack is a vertical site-specific cask that contains a dual-purpose canister (DPC) or a disposable canister. Functional and operational requirements applicable to this system were obtained from ''Project Functional and Operational Requirements'' (F&OR) (Curry 2004 [DIRS 170557]). Other requirements that support the design process were taken from documents such as ''Project Design Criteria Document'' (PDC) (BSC 2004 [DES 171599]), ''Site Fire Hazards Analyses'' (BSC 2005 [DIRS 172174]), and ''Nuclear Safety Design Bases for License Application'' (BSC 2005 [DIRS 171512]). The documents address requirements in the ''Project Requirements Document'' (PRD) (Canori and Leitner 2003 [DIRS 166275]). This SDD includes several appendices. Appendix A is a Glossary; Appendix B is a list of key system charts, diagrams, drawings, lists and additional supporting information; and Appendix C is a list of procedures that will be used to operate the system.

  4. Aging assessment for active fire protection systems

    SciTech Connect (OSTI)

    Ross, S.B. [Science and Engineering Associates, Inc. (United States); Nowlen, S.P.; Tanaka, T. [Sandia National Labs., Albuquerque, NM (United States)

    1995-06-01T23:59:59.000Z

    This study assessed the impact of aging on the performance and reliability of active fire protection systems including both fixed fire suppression and fixed fire detection systems. The experience base shows that most nuclear power plants have an aggressive maintenance and testing program and are finding degraded fire protection system components before a failure occurs. Also, from the data reviewed it is clear that the risk impact of fire protection system aging is low. However, it is assumed that a more aggressive maintenance and testing program involving preventive diagnostics may reduce the risk impact even further.

  5. Countries Diesel Prices Excluding Taxes

    Gasoline and Diesel Fuel Update (EIA)

    excluding taxes) Date Belgium France Germany Italy Netherlands UK US 42715 2.45 2.23 2.40 2.41 2.44 2.40 2.37 42015 2.24 2.15 2.33 2.33 2.34 2.33 2.33 41315 2.21 2.03 2.21...

  6. COMPUTING EXCLUDED MINORS Isolde Adler

    E-Print Network [OSTI]

    Adler, Isolde

    , · linklessly/knotlessly embeddable graphs · C, D minor ideals C D, C D minor ideals · C minor ideal Capex minor ideal Capex := {G | v V(G) such that G \\ v C} ISOLDE ADLER COMPUTING EXCLUDED MINORS 5/18 #12 graphs · C, D minor ideals C D, C D minor ideals · C minor ideal Capex minor ideal Capex := {G | v

  7. Model NOx storage systems: Storage capacity and thermal aging...

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

    Model NOx storage systems: Storage capacity and thermal aging of BaOtheta- Al2O3NiAl(100). Model NOx storage systems: Storage capacity and thermal aging of BaOtheta- Al2O3...

  8. Guidelines Establishing Criteria for Excluding Buildings from...

    Office of Environmental Management (EM)

    Establishing Criteria for Excluding Buildings from the Energy Performance Requirements of Section 543 of the National Energy Conservation Policy Act as Amended by the Energy Policy...

  9. Czech Archaeologists in Uzbekistan Discover Bronze Age Irrigation System

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Czech Archaeologists in Uzbekistan Discover Bronze Age Irrigation System Compiled 20.11.2014 16 they discovered was settlements dating back to the Iron and Bronze Ages, including a well-preserved irrigation system. The Paschurt Valley is located in the south of Uzbekistan, a country which has become

  10. ageing electronic systems: Topics by E-print Network

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

    of the relative merits of competing file system designs. In addition to describing our aging tools, we demonstrate their use by applying them to evaluate two enhancements to the...

  11. System to estimate ages and redshifts for radio galaxies

    E-Print Network [OSTI]

    O. V. Verkhodanov; A. I. Kopylov; N. V. Verkhodanova; O. P. Zhelenkova; V. N. Chernenkov; Yu. N. Parijskij; N. S. Soboleva; A. V. Temirova

    2001-12-06T23:59:59.000Z

    The system allowing a user to operate with simulated curves of spectral energy distribution (SED) and to estimate ages and redshifts by photometric data at server {\\bf sed.sao.ru} is described.

  12. Effect of component aging on PWR control rod drive systems

    SciTech Connect (OSTI)

    Grove, E.; Gunther, W.; Sullivan, K.

    1992-01-01T23:59:59.000Z

    An aging assessment of PWR control rod drive (CRD) systems has been completed as part of the US NRC Nuclear Plant Aging Research (NPAR) Program. The design, construction, maintenance, and operation of the Babcock Wilcox (B W), Combustion Engineering (CE), and Westinghouse (W) systems were evaluated to determine the potential for degradation as each system ages. Operating experience data were evaluated to identify the predominant failure modes, causes, and effects. This, coupled with an assessment of the materials of construction and operating environment, demonstrate that each design is subject to degradation, which if left unchecked, could affect its safety function as the plant ages. An industry survey, conducted with the assistance of EPRI and NUMARC, identified current CRD system maintenance and inspection practices. The results of this survey indicate that some plants have performed system modifications, replaced components, or augmented existing preventive maintenance practices in response to system aging. The survey results also supported the operating experience data, which concluded that the timely replacement of degraded components, prior to failure, was not always possible using existing condition monitoring techniques. The recommendations presented in this study also include a discussion of more advanced monitoring techniques, which provide trendable results capable of detecting aging.

  13. Effect of component aging on PWR control rod drive systems

    SciTech Connect (OSTI)

    Grove, E.; Gunther, W.; Sullivan, K.

    1992-06-01T23:59:59.000Z

    An aging assessment of PWR control rod drive (CRD) systems has been completed as part of the US NRC Nuclear Plant Aging Research (NPAR) Program. The design, construction, maintenance, and operation of the Babcock & Wilcox (B & W), Combustion Engineering (CE), and Westinghouse (W) systems were evaluated to determine the potential for degradation as each system ages. Operating experience data were evaluated to identify the predominant failure modes, causes, and effects. This, coupled with an assessment of the materials of construction and operating environment, demonstrate that each design is subject to degradation, which if left unchecked, could affect its safety function as the plant ages. An industry survey, conducted with the assistance of EPRI and NUMARC, identified current CRD system maintenance and inspection practices. The results of this survey indicate that some plants have performed system modifications, replaced components, or augmented existing preventive maintenance practices in response to system aging. The survey results also supported the operating experience data, which concluded that the timely replacement of degraded components, prior to failure, was not always possible using existing condition monitoring techniques. The recommendations presented in this study also include a discussion of more advanced monitoring techniques, which provide trendable results capable of detecting aging.

  14. Aging study of boiling water reactor high pressure injection systems

    SciTech Connect (OSTI)

    Conley, D.A.; Edson, J.L.; Fineman, C.F. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States)

    1995-03-01T23:59:59.000Z

    The purpose of high pressure injection systems is to maintain an adequate coolant level in reactor pressure vessels, so that the fuel cladding temperature does not exceed 1,200{degrees}C (2,200{degrees}F), and to permit plant shutdown during a variety of design basis loss-of-coolant accidents. This report presents the results of a study on aging performed for high pressure injection systems of boiling water reactor plants in the United States. The purpose of the study was to identify and evaluate the effects of aging and the effectiveness of testing and maintenance in detecting and mitigating aging degradation. Guidelines from the United States Nuclear Regulatory Commission`s Nuclear Plant Aging Research Program were used in performing the aging study. Review and analysis of the failures reported in databases such as Nuclear Power Experience, Licensee Event Reports, and the Nuclear Plant Reliability Data System, along with plant-specific maintenance records databases, are included in this report to provide the information required to identify aging stressors, failure modes, and failure causes. Several probabilistic risk assessments were reviewed to identify risk-significant components in high pressure injection systems. Testing, maintenance, specific safety issues, and codes and standards are also discussed.

  15. Ages of White Dwarf-Red Subdwarf Systems

    E-Print Network [OSTI]

    Hektor Monteiro; Wei-Chun Jao; Todd Henry; John Subasavage; Thom Beaulieu

    2005-10-12T23:59:59.000Z

    We provide the first age estimates for two recently discovered white dwarf-red subdwarf systems, LHS 193AB and LHS 300AB. These unusual systems provide a new opportunity for linking the reliable age estimates for the white dwarfs to the (measurable) metallicities of the red subdwarfs. We have obtained precise photometry in the $V_{J}R_{KC}I_{KC}JH$ bands and spectroscopy covering from 6000\\AA to 9000\\AA for the two new systems, as well as for a comparison white dwarf-main sequence red dwarf system, GJ 283 AB. Using model grids available in the literature, we estimate the cooling age as well as temperature, surface gravity, mass, progenitor mass and {\\it total} lifetimes of the white dwarfs. The results indicate that the two new systems are probably ancient thick disk objects with ages of at least 6-9 Gyr. We also conduct searches of red dwarf and white dwarf compendia from SDSS data and the L{\\'e}pine Shara Proper Motion (LSPM) catalog for additional common proper motion white dwarf-red subdwarf systems. Only seven new candidate systems are found, which indicates the rarity of these systems.

  16. Clean Water Act (excluding Section 404)

    SciTech Connect (OSTI)

    Not Available

    1993-01-15T23:59:59.000Z

    This Reference Book contains a current copy of the Clean Water Act (excluding Section 404) and those regulations that implement the statutes and appear to be most relevant to US Department of Energy (DOE) activities. The document is provided to DOE and contractor staff for informational purposes only and should not be interpreted as legal guidance. Updates that include important new requirements will be provided periodically. Questions concerning this Reference Book may be directed to Mark Petts, EH-231 (202/586-2609).

  17. Aging assessment of reactor instrumentation and protection system components. Aging-related operating experiences

    SciTech Connect (OSTI)

    Gehl, A.C.; Hagen, E.W. [Oak Ridge National Lab., TN (United States)

    1992-07-01T23:59:59.000Z

    A study of the aging-related operating experiences throughout a five-year period (1984--1988) of six generic instrumentation modules (indicators, sensors, controllers, transmitters, annunciators, and recorders) was performed as a part of the Nuclear Plant Aging Research Program. The effects of aging from operational and environmental stressors were characterized from results depicted in Licensee Event Reports (LERs). The data are graphically displayed as frequency of events per plant year for operating plant ages from 1 to 28 years to determine aging-related failure trend patterns. Three main conclusions were drawn from this study: (1) Instrumentation and control (I&C) modules make a modest contribution to safety-significant events: 17% of LERs issued during 1984--1988 dealt with malfunctions of the six I&C modules studied, and 28% of the LERs dealing with these I&C module malfunctions were aging related (other studies show a range 25--50%); (2) Of the six modules studied, indicators, sensors, and controllers account for the bulk (83%) of aging-related failures; and (3) Infant mortality appears to be the dominant aging-related failure mode for most I&C module categories (with the exception of annunciators and recorders, which appear to fail randomly).

  18. Solar System impact rates measured from lunar spherule ages

    E-Print Network [OSTI]

    Muller, Richard A.

    . The samples were irradiated with fast neutrons for 100 hours at the Oregon State University Reactor. Each measured using a MAP 215-C noble gas mass spectrometer. Spherule ages were determined using the 40 Ar/39 Ar

  19. Aging of Class 1E batteries in safety systems of nuclear power plants

    SciTech Connect (OSTI)

    Edson, J.L.; Hardin, J.E.

    1987-07-01T23:59:59.000Z

    This report presents the results of a study of aging effects on safety-related batteries in nuclear power plants. The purpose is to evaluate the aging effects caused by operation within a nuclear facility and to evaluate maintenance, testing, and monitoring practices with respect to their effectiveness in detecting and mitigating the effects of aging. The study follows the US Nuclear Regulatory Commission's (NRC's) Nuclear Plant-Aging Research approach and investigates the materials used in battery construction, identifies stressors and aging mechanisms, presents operating and testing experience with aging effects, analyzes battery-failure events reported in various data bases, and evaluates recommended maintenance practices. Data bases that were analyzed included the NRC's Licensee Event Report system, the Institute for Nuclear Power Operations' Nuclear Plant Reliability Data System, the Oak Ridge National Laboratory's In-Plant Reliability Data System, and The S.M. Stoller Corporation's Nuclear Power Experience data base.

  20. Urine Test Strips to Exclude Cerebral Spinal Fluid Blood

    E-Print Network [OSTI]

    Marshall, Robin A; Hejamanowski, Chris

    2011-01-01T23:59:59.000Z

    two Pearson Chi-Square tests. The first compared samplesO riginal R esearch Urine Test Strips to Exclude CerebralBayer Multistix urine test strips are designed to test

  1. aging monitoring system: Topics by E-print Network

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

    Summary: We report on a design and performances of a monitoring system developed for the aerogel Cherenkov counters (ACC) of the BELLE detector. The system consists of blue LEDs,...

  2. SYSTEMS ENGINEER 1 Northrop Grumman is seeking a recent college graduate, regardless of age, as a Systems Engineer 1 in

    E-Print Network [OSTI]

    Ghani, Nasir

    SYSTEMS ENGINEER 1 Northrop Grumman is seeking a recent college graduate, regardless of age, as a Systems Engineer 1 in our Albuquerque office. Responsibilities include performing use case analyses to support the definition and refinement of system requirements; development of system requirements

  3. FRANTIC 5 (a version of FRANTIC II) : a computer code for evaluating system aging effect

    E-Print Network [OSTI]

    Dimitrijevic, Vesna B.

    1986-01-01T23:59:59.000Z

    The FRANTIC 5 code is a modification of the FRANTIC II code for time dependent unavailability analysis. FRANTIC 5 is specially adapted for modeling the aging effects on system and component performance. The FRANTIC 5 code ...

  4. Scattering from Star Polymers including Excluded Volume Effects

    SciTech Connect (OSTI)

    Li, Xin [ORNL; Do, Changwoo [ORNL; Liu, Yun [National Institute of Standards and Technology (NIST); Sanchez-Diaz, Luis E [ORNL; Hong, Kunlun [ORNL; Smith, Greg [ORNL; Chen, Wei-Ren [ORNL

    2014-01-01T23:59:59.000Z

    In this work we present a new model for the form factor of a star polymer consisting of self-avoiding branches. This new model incorporates excluded volume effects and is derived from the two point correlation function for a star polymer.. We compare this model to small angle neutron scattering (SANS) measurements from polystyrene (PS) stars immersed in a good solvent, tetrahydrofuran (THF). It is shown that this model provides a good description of the scattering signature originating from the excluded volume effect and it explicitly elucidates the connection between the global conformation of a star polymer and the local stiffness of its constituent branch.

  5. Reliability Modeling and Evaluation in Aging Power Systems

    E-Print Network [OSTI]

    Kim, Hag-Kwen

    2010-01-14T23:59:59.000Z

    Renewal process has been often employed as a mathematical model of the failure and repair cycle of components in power system reliability assessment. This implies that after repair, the component is assumed to be restored to be in as good as new...

  6. Aging mechanisms in the Westinghouse PWR (Pressurized Water Reactor) Control Rod Drive system

    SciTech Connect (OSTI)

    Gunther, W.; Sullivan, K.

    1991-01-01T23:59:59.000Z

    An aging assessment of the Westinghouse Pressurized Water Reactor (PWR) Control Rod System (CRD) has been completed as part of the US NRC's Nuclear Plant Aging Research, (NPAR) Program. This study examined the design, construction, maintenance, and operation of the system to determine its potential for degradation as the plant ages. Selected results from this study are presented in this paper. The operating experience data were evaluated to identify the predominant failure modes, causes, and effects. From our evaluation of the data, coupled with an assessment of the materials of construction and the operating environment, we conclude that the Westinghouse CRD system is subject to degradation which, if unchecked, could affect its safety function as a plant ages. Ways to detect and mitigate the effects of aging are included in this paper. The current maintenance for the control rod drive system at fifteen Westinghouse PWRs was obtained through a survey conducted in cooperation with EPRI and NUMARC. The results of the survey indicate that some plants have modified the system, replaced components, or expanded preventive maintenance. Several of these activities have effectively addressed the aging issue. 2 refs., 2 figs., 2 tabs.

  7. Normal Aging and the Dissociable Prototype Learning Systems Brian D. Glass1

    E-Print Network [OSTI]

    Maddox, W. Todd

    that the learning of different types of classification tasks are mediated by functionally and neurally distinct Filoteo & Maddox, 2004). Another important type of classification learning is prototype learning (Homa1 Normal Aging and the Dissociable Prototype Learning Systems Brian D. Glass1 Tanya Chotibut2

  8. Scattering from Colloid-Polymer Conjugates with Excluded Volume Effect

    SciTech Connect (OSTI)

    Li, Xin [ORNL; Sanchez-Diaz, Luis E [ORNL; Smith, Gregory Scott [ORNL; Chen, Wei-Ren [ORNL

    2015-01-01T23:59:59.000Z

    This work presents scattering functions of conjugates consisting of a colloid particle and a self-avoiding polymer chain as a model for protein-polymer conjugates and nanoparticle-polymer conjugates in solution. The model is directly derived from the two-point correlation function with the inclusion of excluded volume effects. The dependence of the calculated scattering function on the geometric shape of the colloid and polymer stiffness is investigated. The model is able to describe the experimental scattering signature of the solutions of suspending hard particle-polymer conjugates and provide additional conformational information. This model explicitly elucidates the link between the global conformation of a conjugate and the microstructure of its constituent components.

  9. Ozone induces glucose intolerance and systemic metabolic effects in young and aged brown Norway rats

    SciTech Connect (OSTI)

    Bass, V. [Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Gordon, C.J.; Jarema, K.A.; MacPhail, R.C. [Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Cascio, W.E. [Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Phillips, P.M. [Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Ledbetter, A.D.; Schladweiler, M.C. [Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Andrews, D. [Research Cores Unit, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Miller, D. [Curriculum in Toxicology, University of North Carolina, Chapel Hill, NC (United States); Doerfler, D.L. [Research Cores Unit, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Kodavanti, U.P., E-mail: kodavanti.urmila@epa.gov [Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States)

    2013-12-15T23:59:59.000Z

    Air pollutants have been associated with increased diabetes in humans. We hypothesized that ozone would impair glucose homeostasis by altering insulin signaling and/or endoplasmic reticular (ER) stress in young and aged rats. One, 4, 12, and 24 month old Brown Norway (BN) rats were exposed to air or ozone, 0.25 or 1.0 ppm, 6 h/day for 2 days (acute) or 2 d/week for 13 weeks (subchronic). Additionally, 4 month old rats were exposed to air or 1.0 ppm ozone, 6 h/day for 1 or 2 days (time-course). Glucose tolerance tests (GTT) were performed immediately after exposure. Serum and tissue biomarkers were analyzed 18 h after final ozone for acute and subchronic studies, and immediately after each day of exposure in the time-course study. Age-related glucose intolerance and increases in metabolic biomarkers were apparent at baseline. Acute ozone caused hyperglycemia and glucose intolerance in rats of all ages. Ozone-induced glucose intolerance was reduced in rats exposed for 13 weeks. Acute, but not subchronic ozone increased ?{sub 2}-macroglobulin, adiponectin and osteopontin. Time-course analysis indicated glucose intolerance at days 1 and 2 (2 > 1), and a recovery 18 h post ozone. Leptin increased day 1 and epinephrine at all times after ozone. Ozone tended to decrease phosphorylated insulin receptor substrate-1 in liver and adipose tissues. ER stress appeared to be the consequence of ozone induced acute metabolic impairment since transcriptional markers of ER stress increased only after 2 days of ozone. In conclusion, acute ozone exposure induces marked systemic metabolic impairments in BN rats of all ages, likely through sympathetic stimulation. - Highlights: Air pollutants have been associated with increased diabetes in humans. Acute ozone exposure produces profound metabolic alterations in rats. Age influences metabolic risk factors in aging BN rats. Acute metabolic effects are reversible and repeated exposure reduces these effects. Ozone metabolic effects are only slightly exacerbated in geriatric rats.

  10. In-situ aging of roof systems containing polyisocyanurate roof insulation foamed with alternative blowing agents

    SciTech Connect (OSTI)

    Desjarlais, A.O.; Christian, J.E.; Graves, R.S.

    1993-10-01T23:59:59.000Z

    Experimental polyisocyanurate (PIR) foam roof insulations with permeable facers were installed in roofing systems and continuously monitored for thermal performance for four years. The foams were produced using a specific formulation that represented current technology in 1989 and were blown with CFC-11, HCFC-123, and HCFC-141b. These foams were installed in roof systems comprised of loosely-laid insulation boards covered by either a loosely-laid single ply white or black membrane. The in-situ testing was carried out on an outdoor test facility, the Roof Thermal Research Apparatus (RTRA). Additional specimens of these foams were aged in the laboratory and periodically evaluated using laboratory measurement equipment. This paper summarizes the in-situ data compiled to date, compares these data with the laboratory results, and examines whether the proposed laboratory procedure for accelerating the aging of foams by the slicing and scaling method accurately predicts the aging characteristics of these materials installed in roof systems. These experiments are part of a joint industry/government project established to evaluate the technical viability of alternative HCFC blowing agents for rigid closed-cell polyisocyanurate foam roof insulations. Members of the project are the US Department of Energy (DOE)/Oak Ridge National Laboratory (ORNL), the US Environmental Protection Agency (EPA), the Society of the Plastics Industry-Polyurethane Division (SPI), the Polyisocyanurate Insulation Manufacturers Association (PIMA), and the National Roofing Contractors Association (NRCA).

  11. The role of footwall deformation and denudation in controlling cooling age patterns of detachment systems: An application to the Kongur Shan extensional system in the

    E-Print Network [OSTI]

    Harrison, Mark

    cooling-age patterns from the footwall of the Cenozoic Kongur Shan normal fault system in the PamirThe role of footwall deformation and denudation in controlling cooling age patterns of detachment systems: An application to the Kongur Shan extensional system in the Eastern Pamir, China Alexander C

  12. Effect of aging on the PWR Chemical and Volume Control System

    SciTech Connect (OSTI)

    Grove, E.J.; Travis, R.J.; Aggarwal, S.K. [Brookhaven National Lab., Upton, NY (United States)

    1995-06-01T23:59:59.000Z

    The PWR Chemical and Volume Control System (CVCS) is designed to provide both safety and non-safety related functions. During normal plant operation it is used to control reactor coolant chemistry, and letdown and charging flow. In many plants, the charging pumps also provide high pressure injection, emergency boration, and RCP seal injection in emergency situations. This study examines the design, materials, maintenance, operation and actual degradation experiences of the system and main sub-components to assess the potential for age degradation. A detailed review of the Nuclear Plant Reliability Data System (NPRDS) and Licensee Event Report (LER) databases for the 1988--1991 time period, together with a review of industry and NRC experience and research, indicate that age-related degradations and failures have occurred. These failures had significant effects on plant operation, including reactivity excursions, and pressurizer level transients. The majority of these component failures resulted in leakage of reactor coolant outside the containment. A representative plant of each PWR design (W, CE, and B and W) was visited to obtain specific information on system inspection, surveillance, monitoring, and inspection practices. The results of these visits indicate that adequate system maintenance and inspection is being performed. In some instances, the frequencies of inspection were increase in response to repeated failure events. A parametric study was performed to assess the effect of system aging on Core Damage Frequency (CDF). This study showed that as motor-operated valve (MOV) operating failures increased, the contribution of the High Pressure Injection to CDF also increased.

  13. Revisiting the age of enlightenment from a collective decision making systems perspective

    SciTech Connect (OSTI)

    Rodriguez, Marko A [Los Alamos National Laboratory; Watkins, Jennifer H [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    The ideals of the eighteenth century's Age of Enlightenment are the foundation of modern democracies. The era was characterized by thinkers who promoted progressive social reforms that opposed the long-established aristocracies and monarchies of the time. Prominent examples of such reforms include the establishment of inalienable human rights, self-governing republics, and market capitalism. Twenty-first century democratic nations can benefit from revisiting the systems developed during the Enlightenment and reframing them within the techno-social context of the Information Age. This article explores the application of social algorithms that make use of Thomas Paine's (English: 1737--1809) representatives, Adam Smith's (Scottish: 1723--1790) self-interested actors, and Marquis de Condorcet's (French: 1743--1794) optimal decision making groups. It is posited that technology-enabled social algorithms can better realize the ideals articulated during the Enlightenment.

  14. GABAergic systems in a model of age-related cognitive impairment

    E-Print Network [OSTI]

    LaSarge, Candi Lynn

    2012-07-16T23:59:59.000Z

    cohort of young and aged rats was characterized in an odor discrimination task. Similar to aged rat water maze performance, some aged rats performed odor learning discrimination problems on par with the young cohort (i.e. aged-unimpaired) and some aged...

  15. Unexpected Complication with the New C3 Excluder: Cause and Treatment

    SciTech Connect (OSTI)

    Katsargyris, Athanasios; Oikonomou, Kyriakos; Bracale, Umberto M.; Verhoeven, Eric L. G., E-mail: Eric.Verhoeven@klinikum-nuernberg.de [Klinikum Nuernberg Sued, Department of Vascular Surgery (Germany)] [Klinikum Nuernberg Sued, Department of Vascular Surgery (Germany)

    2013-04-15T23:59:59.000Z

    The new C3 Gore Excluder delivery system enables both up/downward and rotational repositioning of the device before complete deployment. This contributes to more precise proximal landing and permits facilitation of the contralateral gate cannulation. During separate deployment, the position of the ipsilateral limb can also be readjusted. We have used the modified C3 delivery system in more than 50 patients, and in most cases, we were able to utilize the repositioning options of the device to achieve optimal fixation and sealing. However, we present a case where our attempt to readjust the position of the ipsilateral limb led to upward migration of the main body with coverage of the left renal artery origin. The latter was secured with a bare stent implantation.

  16. RESEARCH PROJECT PROPOSAL (max. 10 pages excluding References)

    E-Print Network [OSTI]

    Detwiler, Russell

    Management Treatment Low Energy Green Infrastructure Wetlands Biofilters 7. Project Leader(s) Name: Prof Ana. To understand and optimize wetland systems for treatment of urban stormwater to support protection of waterways) and wetland systems, which are the key Water Sensitive Urban Design WSUD technology for efficient waterway

  17. Aging of safety class 1E transformers in safety systems of nuclear power plants

    SciTech Connect (OSTI)

    Roberts, E.W.; Edson, J.L.; Udy, A.C. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States)

    1996-02-01T23:59:59.000Z

    This report discusses aging effects on safety-related power transformers in nuclear power plants. It also evaluates maintenance, testing, and monitoring practices with respect to their effectiveness in detecting and mitigating the effects of aging. The study follows the US Nuclear Regulatory Commission`s (NRC`s) Nuclear Plant-Aging Research approach. It investigates the materials used in transformer construction, identifies stressors and aging mechanisms, presents operating and testing experience with aging effects, analyzes transformer failure events reported in various databases, and evaluates maintenance practices. Databases maintained by the nuclear industry were analyzed to evaluate the effects of aging on the operation of nuclear power plants.

  18. Behavioral/Systems/Cognitive Aging Affects Neural Precision of Speech Encoding

    E-Print Network [OSTI]

    ; Hughes et al., 2010; Juarez- Salinas et al., 2010) of aging animals. Speech is temporally dynamic (Lied

  19. UC Davis Student Services Fee (excludes Mental Health funds) Student Services and Fees Administrative Advisory Committee

    E-Print Network [OSTI]

    Pasternack, Gregory B.

    UC Davis Student Services Fee (excludes Mental Health funds) Student Services and Fees Management Capital Projects 2 943,666.00$ (2,807.79)$ (946,473.79)$ -$ Child Care 45,325.16$ 144,957.08$ 99 and Institutional Analysis #12;UC Davis Student Services Fee (excludes Mental Health funds) Student Services

  20. Ultraslow dynamics and stress relaxation in the aging of a soft glassy system

    E-Print Network [OSTI]

    Laurence Ramos; Luca Cipelletti

    2001-09-06T23:59:59.000Z

    We use linear rheology and multispeckle dynamic light scattering (MDLS) to investigate the aging of a gel composed of multilamellar vesicles. Light scattering data indicate rearrangement of the gel through an unusual ultraslow ballistic motion. A dramatic slowdown of the dynamics with sample age $t_{w}$ is observed for both rheology and MDLS, the characteristic relaxation time scaling as $t_{w}^{\\mu}$. We find the same aging exponent $\\mu =0.78$ for both techniques, suggesting that they probe similar physical processes, that is the relaxation of applied or internal stresses for rheology or MDLS, respectively. A simple phenomenological model is developed to account for the observed dynamics.

  1. Transient Water Age Distributions in Environmental Flow Systems: The Time-Marching Laplace Transform Solution Technique

    E-Print Network [OSTI]

    Cornaton, F J

    2011-01-01T23:59:59.000Z

    Environmental fluid circulations are very often characterized by analyzing the fate and behavior of natural and anthropogenic tracers. Among these tracers, age is taken as an ideal tracer which can yield interesting diagnoses, as for example the characterization of the mixing and renewal of water masses, of the fate and mixing of contaminants, or the calibration of hydro-dispersive parameters used by numerical models. Such diagnoses are of great interest in atmospheric and ocean circulation sciences, as well in surface and subsurface hydrology. The temporal evolution of groundwater age and its frequency distributions can display important changes as flow regimes vary due to natural change in climate and hydrologic conditions and/or human induced pressures on the resource to satisfy the water demand. Steady-state age frequency distributions can be modelled using standard numerical techniques, since the general balance equation describing age transport under steady-state flow conditions is exactly equivalent to...

  2. Normal Aging and the Dissociable Prototype Learning Systems Brian D. Glass

    E-Print Network [OSTI]

    Chittka, Lars

    learning (Ashby & Mad- dox, 2005). Recent research suggests there is an age-related deficit in rule, Pacheco, Reeves, Zhu, & Schnyer, 2010, and see Filoteo & Mad- dox, 2004). Another important type

  3. Excluded Volume Effects in Polymer Solutions: II. Comparison of Experimental Results with Numerical Simulation Data

    SciTech Connect (OSTI)

    Graessley, W.W.; Grest, G.S.; Hayward, R.C.

    1999-03-23T23:59:59.000Z

    The effect of excluded volume on the coil size of dilute linear polymers was investigated by off-lattice Monte Carlo simulations. The radius of gyration R{sub g} was evaluated for a wide range of chain lengths at several temperatures and at the athermal condition. The theta temperature and the corresponding theta chain dimensions were established for the system, and the dependence of the size expansion factor, a{sub s} = R{sub g} /(R{sub g}){sub {theta}}, on chain length N and temperature T was examined. For long chains and at high temperatures, a{sub s} is a function of N/N{sub s}{sup 2} alone, where the length scale N{sub s}{sup 2} depends only on T. The form of this simulations-based master function compares favorably with {alpha}{sub s}(M/M{sub s}{sup 2}), an experimental master curve for linear polymers in good solvents, where M{sub s}{sup 2} depends only on polymer-solvent system. Comparisons when N{sub s}{sup 2}(T) and M{sub s}{sup 2}(system) are reduced to common units, numbers of Kuhn steps, strongly indicate that coil expansion in even the best of good solvents is small relative to that expected for truly athermal solutions. An explanation for this behavior is proposed, based on what would appear to be an inherent difference in the equation of state properties for polymeric and monomeric liquids.

  4. Effects of thyroid hormone on. beta. -adrenergic responsiveness of aging cardiovascular systems

    SciTech Connect (OSTI)

    Tsujimoto, G.; Hashimoto, K.; Hoffman, B.B.

    1987-03-01T23:59:59.000Z

    The authors have compared the effects of ..beta..-adrenergic stimulation on the heart and peripheral vasculature of young (2-mo-old) and older (12-mo-old) rats both in the presence and absence of triiodothyronine (T/sub 3/)-induced hyperthyroidism. The hemodynamic consequences of T/sub 3/ treatment were less prominent in the aged hyperthyroid rats compared with young hyperthyroid rats (both in intact and pithed rats). There was a decrease in sensitivity of chronotropic responsiveness to isoproterenol in older pithed rats, which was apparently reversed by T/sub 3/ treatment. The number and affinity of myocardial ..beta..-adrenergic receptor sites measured by (/sup 125/I)cyanopindolol were not significantly different in young and older control rats; also, ..beta..-receptor density increased to a similar extent in both young and older T/sub 3/-treated rats. The ability of isoproterenol to relax mesenteric arterial rings, markedly blunted in older rats, was partially restored by T/sub 3/ treatment without their being any change in isoproterenol-mediated relaxation in the arterial preparation from young rats. The number and affinity of the ..beta..-adrenergic receptors measured in the mesenteric arteries was unaffected by either aging or T/sub 3/ treatment. The data suggest that effects of thyroid hormone and age-related alterations of cardiovascular responsiveness to ..beta..-adrenergic stimulation are interrelated in a complex fashion with a net result that the hyperkinetic cardiovascular manifestations in hyperthyroidism are attenuated in the older animals.

  5. Estimation of fracture toughness of cast stainless steels during thermal aging in LWR systems

    SciTech Connect (OSTI)

    Chopra, O.K. (Argonne National Lab., IL (USA))

    1991-06-01T23:59:59.000Z

    A procedure and correlations are presented for predicting the change in fracture toughness of cast stainless steel components due to thermal aging during service in light water rectors (LWRs) at 280--330{degrees}C (535--625{degrees}F). The fracture toughness J-R curve and Charpy-impact energy of aged cast stainless steels are estimated from known mineral in formation. Fracture toughness of a specific cast stainless steel is estimated from the extent and kinetics of thermal embrittlement. The extent of thermal embrittlement is characterized by the room-temperature normalized'' Charpy-impact energy. A correlation for the extent of embrittlement at saturation,'' i.e., the minimum impact energy that would be achieved for the material after long-term aging, is given in terms of a material parameter, {Phi}, which is determined from the chemical composition. The fracture toughness J-R curve for the material is then obtained from correlations between room-temperature Charpy-impact energy and fracture toughness parameters. Fracture toughness as a function of time and temperature of reactor service is estimated from the kinetics of thermal embrittlement, which is determined from chemical composition. A common lower-bound'' J-R curve for cast stainless steels with unknown chemical composition is also defined for a given material specification, ferrite content, and temperature. Examples for estimating impact strength and fracture toughness of cast stainless steel components during reactor service are describes. 24 refs., 39 figs., 2 tabs.

  6. Estimation of fracture toughness of cast stainless steels during thermal aging in LWR systems - Revison 1.

    SciTech Connect (OSTI)

    Chopra, O. K.; Energy Technology

    1994-10-05T23:59:59.000Z

    This report presents a revision of the procedure and correlations presented earlier in NUREG/CR-4513, ANL-90/42 (June 1991) for predicting the change in mechanical properties of cast stainless steel components due to thermal aging during service in light water reactors at 280-330 C (535-625 F). The correlations presented in this report are based on an expanded data base and have been optimized with mechanical-property data on cast stainless steels aged up to {approx}58,000 h at 290-350 C (554-633 F). The correlations for estimating the change in tensile stress, including the Ramberg/Osgood parameters for strain hardening, are also described. The fracture toughness J-R curve, tensile stress, and Charpy-impact energy of aged cast stainless steels are estimated from known material information. Mechanical properties of a specific cast stainless steel are estimated from the extent and kinetics of thermal embrittlement. Embrittlement of cast stainless steels is characterized in terms of room-temperature Charpy-impact energy. The extent or degree of thermal embrittlement at 'saturation,' i.e., the minimum impact energy that can be achieved for a material after long-term aging, is determined from the chemical composition of the steel. Charpy-impact energy as a function of time and temperature of reactor service is estimated from the kinetics of thermal embrittlement, which are also determined from the chemical composition. The initial impact energy of the unaged steel is required for these estimations. Initial tensile flow stress is needed for estimating the flow stress of the aged material. The fracture toughness J-R curve for the material is then obtained by correlating room-temperature Charpy-impact energy with fracture toughness parameters. The values of JIC are determined from the estimated J-R curve and flow stress. A common 'predicted lower-bound' J-R curve for cast stainless steels of unknown chemical composition is also defined for a given grade of steel, range of ferrite content, and temperature. Examples of estimating mechanical properties of cast stainless steel components during reactor service are presented.

  7. Aging of gaseous detectors

    SciTech Connect (OSTI)

    Va'Vra, J.

    1990-03-01T23:59:59.000Z

    This paper makes an overview of developments in the wire chamber aging field since the wire chamber aging workshop held at the Lawrence Berkeley Laboratory, Berkeley, California on January 16--17, 1986. The author discusses new techniques to analyze the gas impurities and the wire aging products, wire nonaging'' in clean systems, wire aging in systems containing various impurities, various examples of problems which can prime'' surfaces prior to the occurrence of the aging, and some recent aging experience with the SSC micro-straw tubes.'' 35 refs., 10 figs., 2 tabs.

  8. *Excludes capital investment for P&R facility EFFECTS OF MAP-21 ON SEAMLESS TRANSIT FROM

    E-Print Network [OSTI]

    *Excludes capital investment for P&R facility EFFECTS OF MAP-21 ON SEAMLESS TRANSIT FROM FORT BEND is not available for residents making the commute from FBC to Downtown Houston. Researchers estimate latent demand for 1,700+ P&R one-way passenger trips per day. SEAMLESS TRANSIT COST Federal funds may

  9. Critical scaling and aging in cooling systems near the jamming transition

    E-Print Network [OSTI]

    D. A. Head

    2009-04-01T23:59:59.000Z

    We conduct athermal simulations of freely-cooling, viscous soft spheres around the jamming transition density \\phi_{J}, and find evidence for a growing length \\xi(t) that governs relaxation to mechanical equilibrium. \\xi(t) is manifest in both the velocity correlation function, and the spatial correlations in a scalar measure of local force balance which we define. Data for different densities \\phi can be collapsed onto two master curves by scaling \\xi(t) and t by powers of |\\phi-\\phi_{J}|, indicative of critical scaling. Furthermore, particle transport for \\phi>\\phi_{J} exhibits aging and superdiffusion similar to a range of soft matter experiments, suggesting a common origin. Finally, we explain how \\xi(t) at late times maps onto known behavior away from \\phi_{J}.

  10. Prioritization of reactor control components susceptible to fire damage as a consequence of aging

    SciTech Connect (OSTI)

    Lowry, W.; Vigil, R. [Science and Engineering Associates, Inc., Albuquerque, NM (United States); Nowlen, S. [Sandia National Labs., Albuquerque, NM (United States)

    1994-01-01T23:59:59.000Z

    The Fire Vulnerability of Aged Electrical Components Test Program is to identify and assess issues of plant aging that could lead to an increase in nuclear power plant risk because of fires. Historical component data and prior analyses are used to prioritize a list of components with respect to aging and fire vulnerability and the consequences of their failure on plant safety systems. The component list emphasizes safety system control components, but excludes cables, large equipment, and devices encompassed in the Equipment Qualification (EQ) program. The test program selected components identified in a utility survey and developed test and fire conditions necessary to maximize the effectiveness of the test program. Fire damage considerations were limited to purely thermal effects.

  11. Experience, Age, and Subject Matter Bias of Secondary Teachers Using the American Association of School Personnel Administrator's Interactive Computer Interview System

    E-Print Network [OSTI]

    Massey, Stephen Phillip

    2010-05-10T23:59:59.000Z

    The objective of this study was to determine whether age, teaching experience, and content area taught influences the score earned by secondary school teachers when using the Interactive Computer Interview System. Results ...

  12. Clean Water Act (excluding Section 404). Environmental guidance program reference book: Revision 6

    SciTech Connect (OSTI)

    Not Available

    1993-01-15T23:59:59.000Z

    This Reference Book contains a current copy of the Clean Water Act (excluding Section 404) and those regulations that implement the statutes and appear to be most relevant to US Department of Energy (DOE) activities. The document is provided to DOE and contractor staff for informational purposes only and should not be interpreted as legal guidance. Updates that include important new requirements will be provided periodically. Questions concerning this Reference Book may be directed to Mark Petts, EH-231 (202/586-2609).

  13. Facts and Figures January 2007 INCOME AND EXPENDITURE (Excluding Press, CA & Trusts) 2005-06

    E-Print Network [OSTI]

    Travis, Adrian

    Facts and Figures January 2007 INCOME AND EXPENDITURE (Excluding Press, CA & Trusts) 2005-06 2004,928 Breakdown of Research Grant Income 2005-06 £'000 % £'000 Total staff 8602 8570 8,623 Research Councils 89,095 Total 203,886 188,711 Total respondents 2,890 100.0% 3,227 100.0 Breakdown of HEFCE/TDA Income 2005-06

  14. Method for excluding salt and other soluble materials from produced water

    DOE Patents [OSTI]

    Phelps, Tommy J. (Knoxville, TN) [Knoxville, TN; Tsouris, Costas (Oak Ridge, TN) [Oak Ridge, TN; Palumbo, Anthony V. (Oak Ridge, TN) [Oak Ridge, TN; Riestenberg, David E. (Knoxville, TN) [Knoxville, TN; McCallum, Scott D. (Knoxville, TN) [Knoxville, TN

    2009-08-04T23:59:59.000Z

    A method for reducing the salinity, as well as the hydrocarbon concentration of produced water to levels sufficient to meet surface water discharge standards. Pressure vessel and coflow injection technology developed at the Oak Ridge National Laboratory is used to mix produced water and a gas hydrate forming fluid to form a solid or semi-solid gas hydrate mixture. Salts and solids are excluded from the water that becomes a part of the hydrate cage. A three-step process of dissociation of the hydrate results in purified water suitable for irrigation.

  15. How to confirm and exclude different models of material properties in the Casimir effect

    E-Print Network [OSTI]

    V. M. Mostepanenko

    2014-11-17T23:59:59.000Z

    We formulate a method allowing to confirm or exclude the alternative models of material properties at some definite confidence level in experiments on measuring the Casimir force. The method is based on the consideration of differences between the theoretical and mean measured quantities and the confidence intervals for these differences found at sufficiently high or low confidence probabilities. The developed method is applied to the data of four recent experiments on measuring the gradient of the Casimir force by means of a dynamic atomic force microscope. It is shown that in experiments with Au-Au and Ni-Ni test bodies, where the Drude model approach is excluded at a 95% confidence level, the plasma model approach agrees with the data at higher than 90% confidence. In experiments using an Au sphere interacting with either a Ni plate or a graphene-coated substrate the measurement data agree with the common prediction of the Drude and plasma model approaches and theory using the polarization tensor at 90% and 80% confidence levels, respectively.

  16. Groundwater age, life expectancy and transit time distributions in advective-dispersive systems: 1. Generalized reservoir theory

    E-Print Network [OSTI]

    Cornaton, F; 10.1016/j.advwatres.2005.10.009

    2011-01-01T23:59:59.000Z

    We present a methodology for determining reservoir groundwater age and transit time probability distributions in a deterministic manner, considering advective-dispersive transport in steady velocity fields. In a first step, we propose to model the statistical distribution of groundwater age at aquifer scale by means of the classical advection-dispersion equation for a conservative and nonreactive tracer, associated to proper boundary conditions. The evaluated function corresponds to the density of probability of the random variable age, age being defined as the time elapsed since the water particles entered the aquifer. An adjoint backward model is introduced to characterize the life expectancy distribution, life expectancy being the time remaining before leaving the aquifer. By convolution of these two distributions, groundwater transit time distributions, from inlet to outlet, are fully defined for the entire aquifer domain. In a second step, an accurate and efficient method is introduced to simulate the tr...

  17. Determinaton of the relationship of free volume to mechanical behavior for an epoxy system subjected to various aging histories

    E-Print Network [OSTI]

    Ring, Darryl Steven

    1979-01-01T23:59:59.000Z

    Stress is 1120 psi) Cooldown To 300 'F At: 100'F/min 60'F/min 20'F/min 5'F/min Aging Time (Hours) At 300'F 0 1/2 2 15 0 1/2 2 15 0 1/2 2 15 0 1/2 2 15 Cooldown To 200'F At; 100'F/min 60'F/min 20'F/min 5'F/min Aging Time (Hours) At 200...

  18. Estimation of fracture toughness of cast stainless steels during thermal aging in LWR systems-revision 1

    SciTech Connect (OSTI)

    Chopra, O.K

    1994-08-01T23:59:59.000Z

    This report presents a revision of the procedure and correlations presented earlier in NUREG/CR-4513, ANL-90/42 (June 1991) for predicting the change in mechanical properties of cast stainless steel components due to thermal aging during service in light water reactors at 280-330{degrees}C (535-625{degrees}F). The correlations presented in this report are based on an expanded data base and have been optimized with mechanical-property data on cast stainless steels aged up to {approx}58,000 h at 290-350{degrees}C (554-633{degrees}F). The fracture toughness J-R curve, tensile stress, and Charpy-impact energy of aged cast stainless steels are estimated from known material information. Mechanical properties of a specific cast stainless steel are estimated from the extent and kinetics of thermal embrittlement. Embrittlement of cast stainless steels is characterized in terms of room-temperature Charpy-impact energy. Charpy-impact energy as a function of time and temperature of reactor service is estimated from the kinetics of thermal embrittlement, which are also determined from the chemical composition. The initial impact energy of the unaged steel is required for these estimations. Initial tensile flow stress is needed for estimating the flow stress of the aged material. The fracture toughness J-R curve for the material is then obtained by correlating room-temperature Charpy-impact energy with fracture toughness parameters. The values of J{sub IC} are determined from the estimated J-R curve and flow stress. A common {open_quotes}predicted lower-bound{close_quotes} J-R curve for cast stainless steels of unknown chemical composition is also defined for a given grade of steel, range of ferrite content, and temperature. Examples of estimating mechanical properties of cast stainless steel components during reactor service are presented.

  19. "ENDING STOCKS OF CRUDE OIL (excluding SPR)"

    U.S. Energy Information Administration (EIA) 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells, Wisconsin:Deployment ActivitiesAge Refining Air BP AlonDistrictFuel

  20. Determination of optimal LWR containment design, excluding accidents more severe than Class 8

    SciTech Connect (OSTI)

    Cave, L.; Min, T.K.

    1980-04-01T23:59:59.000Z

    Information is presented concerning the restrictive effect of existing NRC requirements; definition of possible targets for containment; possible containment systems for LWR; optimization of containment design for class 3 through class 8 accidents (PWR); estimated costs of some possible containment arrangements for PWR relative to the standard dry containment system; estimated costs of BWR containment.

  1. Journal and Book Citations of Zoran Gajic's Publications Excluding Professor Gajic's self-referencing

    E-Print Network [OSTI]

    Gajic, Zoran

    , Systems & Control Letters, 2000. 18. 25 Su, Gajic, and Shen, IEEE Transactions on Automatic Control, 1992b. 12 Gajic, Systems & Control Letters, 1988. 35. 11 Gajic and Lim, IEEE Transactions on Automatic and Gajic, IEEE Transactions on Automatic Control, 1994. 8. 36 Khalil and Gajic, IEEE Transactions

  2. I. Excluded Volume Effects in Ising Cluster Distributions and Nuclear Multifragmentation II. Multiple-Chance Effects in Alpha-Particle Evaporation

    SciTech Connect (OSTI)

    Breus, Dimitry E.

    2005-05-16T23:59:59.000Z

    In Part 1, geometric clusters of the Ising model are studied as possible model clusters for nuclear multifragmentation. These clusters may not be considered as non-interacting (ideal gas) due to excluded volume effect which predominantly is the artifact of the cluster's finite size. Interaction significantly complicates the use of clusters in the analysis of thermodynamic systems. Stillinger's theory is used as a basis for the analysis, which within the RFL (Reiss, Frisch, Lebowitz) fluid-of-spheres approximation produces a prediction for cluster concentrations well obeyed by geometric clusters of the Ising model. If thermodynamic condition of phase coexistence is met, these concentrations can be incorporated into a differential equation procedure of moderate complexity to elucidate the liquid-vapor phase diagram of the system with cluster interaction included. The drawback of increased complexity is outweighted by the reward of greater accuracy of the phase diagram, as it is demonstrated by the Ising model. A novel nuclear-cluster analysis procedure is developed by modifying Fisher's model to contain cluster interaction and employing the differential equation procedure to obtain thermodynamic variables. With this procedure applied to geometric clusters, the guidelines are developed to look for excluded volume effect in nuclear multifragmentation. In part 2, an explanation is offered for the recently observed oscillations in the energy spectra of {alpha}-particles emitted from hot compound nuclei. Contrary to what was previously expected, the oscillations are assumed to be caused by the multiple-chance nature of {alpha}-evaporation. In a semi-empirical fashion this assumption is successfully confirmed by a technique of two-spectra decomposition which treats experimental {alpha}-spectra has having contributions from at least two independent emitters. Building upon the success of the multiple-chance explanation of the oscillations, Moretto's single-chance evaporation theory is augmented to include multiple-chance emission and tested on experimental data to yield positive results.

  3. Managing aging effects on dry cask storage systems for extended long-term storage and transportation of used fuel - rev. 0

    SciTech Connect (OSTI)

    Chopra, O.K.; Diercks, D.; Fabian, R.; Ma, D.; Shah, V.; Tam, S.W.; Liu, Y. (Decision and Information Sciences); ( EVS); ( NE)

    2012-07-06T23:59:59.000Z

    The cancellation of the Yucca Mountain repository program in the United States raises the prospect of extended long-term storage (i.e., >120 years) and deferred transportation of used fuel at operating and decommissioned nuclear power plant sites. Under U.S. federal regulations contained in Title 10 of the Code of Federal Regulations (CFR) 72.42, the initial license term for an Independent Spent Fuel Storage Installation (ISFSI) must not exceed 40 years from the date of issuance. Licenses may be renewed by the U.S. Nuclear Regulatory Commission (NRC) at the expiration of the license term upon application by the licensee for a period not to exceed 40 years. Application for ISFSI license renewals must include the following: (1) Time-limited aging analyses (TLAAs) that demonstrate that structures, systems, and components (SSCs) important to safety will continue to perform their intended function for the requested period of extended operation; and (2) a description of the aging management program (AMP) for management of issues associated with aging that could adversely affect SSCs important to safety. In addition, the application must also include design bases information as documented in the most recent updated final safety analysis report as required by 10 CFR 72.70. Information contained in previous applications, statements, or reports filed with the Commission under the license may be incorporated by reference provided that those references are clear and specific. The NRC has recently issued the Standard Review Plan (SRP) for renewal of used-fuel dry cask storage system (DCSS) licenses and Certificates of Compliance (CoCs), NUREG-1927, under which NRC may renew a specific license or a CoC for a term not to exceed 40 years. Both the license and the CoC renewal applications must contain revised technical requirements and operating conditions (fuel storage, surveillance and maintenance, and other requirements) for the ISFSI and DCSS that address aging effects that could affect the safe storage of the used fuel. The information contained in the license and CoC renewal applications will require NRC review to verify that the aging effects on the SSCs in DCSSs/ ISFSIs are adequately managed for the period of extended operation. To date, all of the ISFSIs located across the United States with more than 1,500 dry casks loaded with used fuel have initial license terms of 20 years; three ISFSIs (Surry, H.B. Robinson and Oconee) have received their renewed licenses for 20 years, and two other ISFSIs (Calvert Cliffs and Prairie Island) have applied for license renewal for 40 years. This report examines issues related to managing aging effects on the SSCs in DCSSs/ISFSIs for extended long-term storage and transportation of used fuels, following an approach similar to that of the Generic Aging Lessons Learned (GALL) report, NUREG-1801, for the aging management and license renewal of nuclear power plants. The report contains five chapters and an appendix on quality assurance for aging management programs for used-fuel dry storage systems. Chapter I of the report provides an overview of the ISFSI license renewal process based on 10 CFR 72 and the guidance provided in NUREG-1927. Chapter II contains definitions and terms for structures and components in DCSSs, materials, environments, aging effects, and aging mechanisms. Chapter III and Chapter IV contain generic TLAAs and AMPs, respectively, that have been developed for managing aging effects on the SSCs important to safety in the dry cask storage system designs described in Chapter V. The summary descriptions and tabulations of evaluations of AMPs and TLAAs for the SSCs that are important to safety in Chapter V include DCSS designs (i.e., NUHOMS{reg_sign}, HI-STORM 100, Transnuclear (TN) metal cask, NAC International S/T storage cask, ventilated storage cask (VSC-24), and the Westinghouse MC-10 metal dry storage cask) that have been and continue to be used by utilities across the country for dry storage of used fuel to date. The goal of this report is to help establish the technical

  4. International Atomic Energy Agency specialists meeting on experience in ageing, maintenance, and modernization of instrumentation and control systems for improving nuclear power plant availability

    SciTech Connect (OSTI)

    Not Available

    1993-10-01T23:59:59.000Z

    This report presents the proceedings of the Specialist`s Meeting on Experience in Aging, Maintenance and Modernization of Instrumentation and Control Systems for Improving Nuclear Power Plant Availability that was held at the Ramada Inn in Rockville, Maryland on May 5--7, 1993. The Meeting was presented in cooperation with the Electric Power Research Institute, Oak Ridge National Laboratory and the International Atomic Energy Agency. There were approximately 65 participants from 13 countries at the Meeting. Individual reports have been cataloged separately.

  5. Relative Ages of Globular Clusters

    E-Print Network [OSTI]

    Thomas H. Puzia

    2002-10-18T23:59:59.000Z

    Ages of extragalactic globular clusters can provide valuable insights into the formation and evolution of galaxies. In this contribution the photometric methods of age dating old globular cluster systems are summarised. The spectroscopic approach is reviewed with an emphasis of the right choice of age diagnostics. We present a new method of quantifying the relatively best age-sensitive spectroscopic index given the quality of a data set and a certain theoretical stellar synthesis model. The relatively best diagnostic plot is constructed from the set of Lick indices and used to age date globular clusters in several early-type galaxies which are part of a large spectroscopic survey of extragalactic globular cluster systems. We find that, independently of host galaxy, metal-poor ([Fe/H] 8 Gyr) and coeval. Metal-rich clusters show a wide range of ages from ~15 down to a few Gyr.

  6. Water Resources Data. Ohio - Water Year 1992. Volume 1. Ohio River Basin excluding project data

    SciTech Connect (OSTI)

    H.L. Shindel; J.H. Klingler; J.P. Mangus; L.E. Trimble

    1993-03-01T23:59:59.000Z

    Water-resources data for the 1992 water year for Ohio consist of records of stage, discharge, and water quality of streams; stage and contents of lakes and reservoirs; and water levels and water quality of ground-water wells. This report, in two volumes, contains records for water discharge at 121 gaging stations, 336 wells, and 72 partial-record sites; and water levels at 312 observation wells. Also included are data from miscellaneous sites. Additional water data were collected at various sites not involved in the systematic data-collection program and are published as miscellaneous measurements and analyses. These data represent that part of the National Water Data System collected by the US Geological Survey and cooperating State and Federal agencies in Ohio. Volume 1 covers the central and southern parts of Ohio, emphasizing the Ohio River Basin. (See Order Number DE95010451 for Volume 2 covering the northern part of Ohio.)

  7. Water Resources Data Ohio: Water year 1994. Volume 1, Ohio River Basin excluding Project Data

    SciTech Connect (OSTI)

    NONE

    1994-12-31T23:59:59.000Z

    The Water Resources Division of the US Geological Survey (USGS) in cooperation with State agencies, obtains a large amount of data each water year (a water year is the 12-month period from October 1 through September 30 and is identified by the calendar year in which it ends) pertaining to the water resources of Ohio. These data, accumulated during many years, constitute a valuable data base for developing an improved understanding of the water resources of the State. To make these data readily available to interested parties outside the USGS, they are published annually in this report series entitled ``Water Resources Data--Ohio.`` This report (in two volumes) includes records on surface water and ground water in the State. Specifically, it contains: (1) Discharge records for streamflow-gaging stations, miscellaneous sites, and crest-stage stations; (2) stage and content records for streams, lakes, and reservoirs; (3) water-quality data for streamflow-gaging stations, wells, synoptic sites, and partial-record sit -aid (4) water-level data for observation wells. Locations of lake-and streamflow-gaging stations, water-quality stations, and observation wells for which data are presented in this volume are shown in figures 8a through 8b. The data in this report represent that part of the National Water Data System collected by the USGS and cooperating State and Federal agencies in Ohio. This series of annual reports for Ohio began with the 1961 water year with a report that contained only data relating to the quantities of surface water. For the 1964 water year, a similar report was introduced that contained only data relating to water quality. Beginning with the 1975 water year, the report was changed to present (in two or three volumes) data on quantities of surface water, quality of surface and ground water, and ground-water levels.

  8. age horizontal branch: Topics by E-print Network

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

    Stars as an Age Indicator Astrophysics (arXiv) Summary: Surface temperature distribution of horizontal-branch (HB) stars is very sensitive to age in old stellar systems,...

  9. ALPHA SPECTROMETRIC EVALUATION OF SRM-995 AS A POTENTIAL URANIUM/THORIUM DOUBLE TRACER SYSTEM FOR AGE-DATING URANIUM MATERIALS

    SciTech Connect (OSTI)

    Beals, D.

    2011-12-06T23:59:59.000Z

    Uranium-233 (t{sub 1/2} {approx} 1.59E5 years) is an artificial, fissile isotope of uranium that has significant importance in nuclear forensics. The isotope provides a unique signature in determining the origin and provenance of uranium-bearing materials and is valuable as a mass spectrometric tracer. Alpha spectrometry was employed in the critical evaluation of a {sup 233}U standard reference material (SRM-995) as a dual tracer system based on the in-growth of {sup 229}Th (t{sub 1/2} {approx} 7.34E3 years) for {approx}35 years following radiochemical purification. Preliminary investigations focused on the isotopic analysis of standards and unmodified fractions of SRM-995; all samples were separated and purified using a multi-column anion-exchange scheme. The {sup 229}Th/{sup 233}U atom ratio for SRM-995 was found to be 1.598E-4 ({+-} 4.50%) using recovery-corrected radiochemical methods. Using the Bateman equations and relevant half-lives, this ratio reflects a material that was purified {approx} 36.8 years prior to this analysis. The calculated age is discussed in contrast with both the date of certification and the recorded date of last purification.

  10. Design Evolution Study - Aging Options

    SciTech Connect (OSTI)

    P. McDaniel

    2002-04-05T23:59:59.000Z

    The purpose of this study is to identify options and issues for aging commercial spent nuclear fuel received for disposal at the Yucca Mountain Mined Geologic Repository. Some early shipments of commercial spent nuclear fuel to the repository may be received with high-heat-output (younger) fuel assemblies that will need to be managed to meet thermal goals for emplacement. The capability to age as much as 40,000 metric tons of heavy metal of commercial spent nuclear he1 would provide more flexibility in the design to manage this younger fuel and to decouple waste receipt and waste emplacement. The following potential aging location options are evaluated: (1) Surface aging at four locations near the North Portal; (2) Subsurface aging in the permanent emplacement drifts; and (3) Subsurface aging in a new subsurface area. The following aging container options are evaluated: (1) Complete Waste Package; (2) Stainless Steel inner liner of the waste package; (3) Dual Purpose Canisters; (4) Multi-Purpose Canisters; and (5) New disposable canister for uncanistered commercial spent nuclear fuel. Each option is compared to a ''Base Case,'' which is the expected normal waste packaging process without aging. A Value Engineering approach is used to score each option against nine technical criteria and rank the options. Open issues with each of the options and suggested future actions are also presented. Costs for aging containers and aging locations are evaluated separately. Capital costs are developed for direct costs and distributable field costs. To the extent practical, unit costs are presented. Indirect costs, operating costs, and total system life cycle costs will be evaluated outside of this study. Three recommendations for aging commercial spent nuclear fuel--subsurface, surface, and combined surface and subsurface are presented for further review in the overall design re-evaluation effort. Options that were evaluated but not recommended are: subsurface aging in a new subsurface area (high cost); surface aging in the complete waste package (risk to the waste package and impact on the Waste Handling Facility); and aging in the stainless steel liner (impact on the waste package design and new high risk operations added to the waste packaging process). The selection of a design basis for aging will be made in conjunction with the other design re-evaluation studies.

  11. Neurobiology of Aging 32 (2011) 669679 Age-related trends in saccade characteristics among the elderly

    E-Print Network [OSTI]

    Munoz, Douglas Perry

    2011-01-01T23:59:59.000Z

    Neurobiology of Aging 32 (2011) 669679 Age-related trends in saccade characteristics among of Psychology, Queen's University, Kingston, Ontario, Canada e CIHR Group in Sensory-Motor Systems, Queen in reaction time also correlated positively with age in both saccade tasks. Voluntary saccade control

  12. Faculty of Law Number of students who has finished (with a degree) and early leavers (excluding transferred students) by AY (As of May 1, 2012)

    E-Print Network [OSTI]

    Banbara, Mutsunori

    Holdover H OthersI) Total + early admission Total GraduatesC) over-term within designated term Rate outside school Reasons to leaveF) Leaving RateG) Holdover H within designated term over-term GraduatesCFaculty of Law Number of students who has finished (with a degree) and early leavers (excluding

  13. (Data in thousand metric tons of silicon content unless otherwise noted) Domestic Production and Use: Estimated value of silicon alloys and metal (excluding semiconductor-and solar-

    E-Print Network [OSTI]

    Production and Use: Estimated value of silicon alloys and metal (excluding semiconductor- and solar- grade silicon) produced in the United States in 2009 was $470 million. Four companies produced silicon materials in six plants. Of those companies, three produced ferrosilicon in four plants. Metallurgical

  14. rule'' to reduce the monetary penalty by 50 to 75 percent right off the top. Citizens are often excluded from EPA

    E-Print Network [OSTI]

    Peterson, M. Nils

    environmental projects (SEPs), begun in the late 1990s, so that convicted polluters can mitigate the damage excluded from EPA decision making, even when it affects them. For example, in a federal environmental-impact statement, citizens are not given notice of a preliminary environmental assessment of their neighborhood

  15. Welding tritium aged stainless steel

    SciTech Connect (OSTI)

    Kanne, W.R. Jr.

    1993-04-01T23:59:59.000Z

    Stainless steels exposed to tritium become unweldable by conventional methods due to He buildup within the metal matrix. With longer service lives expected for new weapon systems, and service life extensions of older systems, methods for welding/repair on tritium-exposed material will become important. Results are reported that indicate that both solid-state resistance welding and low-heat gas metal arc overlay welding are promising methods for repair or modification of tritium-aged stainless steel.

  16. Faculty of Law Number of students who has finished (with a degree) and early leavers (excluding transferred students) by AY (As of May 1, 2011)

    E-Print Network [OSTI]

    Banbara, Mutsunori

    Faculty of Law Number of students who has finished (with a degree) and early leavers (excluding or less more than 1 year Law 180 227 227 155 65 220 68% 29% 97% 5 2% 0 2 Total 180 227 227 155 65 220 68% 29% 97% 5 2% 0 2 Law 180 184 184 139 37 176 76% 20% 96% 6 3% 2 0 Total 180 184 184 139 37 176 76% 20

  17. Parylene C Aging Studies.

    SciTech Connect (OSTI)

    Achyuthan, Komandoor; Sawyer, Patricia Sue.; Mata, Guillermo Adrian; White II, Gregory Von; Bernstein, Robert

    2014-09-01T23:59:59.000Z

    Parylene C is used in a device because of its conformable deposition and other advantages. Techniques to study Parylene C aging were developed, and %22lessons learned%22 that could be utilized for future studies are the result of this initial study. Differential Scanning Calorimetry yielded temperature ranges for Parylene C aging as well as post-deposition treatment. Post-deposition techniques are suggested to improve Parylene C performance. Sample preparation was critical to aging regimen. Short-term (~40 days) aging experiments with free standing and ceramic-supported Parylene C films highlighted %22lessons learned%22 which stressed further investigations in order to refine sample preparation (film thickness, single sided uniform coating, machine versus laser cutting, annealing time, temperature) and testing issues (%22necking%22) for robust accelerated aging of Parylene C.

  18. COOEE bitumen: chemical aging

    E-Print Network [OSTI]

    Lemarchand, Claire A; Dyre, Jeppe C; Hansen, Jesper S

    2013-01-01T23:59:59.000Z

    We study chemical aging in "COOEE bitumen" using molecular dynamic simulations. The model bitumen is composed of four realistic molecule types: saturated hydrocarbon, resinous oil, resin, and asphaltene. The aging reaction is modelled by the chemical reaction: "2 resins $\\rightarrow$ 1 asphaltene". Molecular dynamic simulations of four bitumen compositions, obtained by a repeated application of the aging reaction, are performed. The stress autocorrelation function, the fluid structure, the rotational dynamics of the plane aromatic molecules, and the diffusivity of each molecule, are determined for the four different compositions. The aging reaction causes a significant dynamics slowdown, which is correlated to the aggregation of asphaltene molecules in larger and dynamically slower nanoaggregates. Finally, a detailed description of the role of each molecule types in the aggregation and aging processes is given.

  19. Reading for the Soul in Stanislavski's The Work of the Actor on Him/Herself: Orthodox Mysticism, Mainstream Occultism, Psychology and the System in the Russian Silver Age

    E-Print Network [OSTI]

    Carriere, Patrick Christopher

    2010-04-30T23:59:59.000Z

    Konstantin Sergeevich Stanislavski's system of actor training has become a common foundation for modern approaches to acting through much of the world. This study explores Stanislavski's writings within the context of ...

  20. New Age Teaching: Beyond Didactics

    E-Print Network [OSTI]

    Vlaovic, Peter D; McDougall, Elspeth M

    2006-01-01T23:59:59.000Z

    Age Teaching: Beyond Didactics TheScientificWorldJOURNAL (New age teaching: beyond didactics. TSW Urology 1, 7585.New Age Teaching: Beyond Didactics Peter D. Vlaovic and

  1. Aging in community

    E-Print Network [OSTI]

    Fay, Justin (Justin Thomas)

    2008-01-01T23:59:59.000Z

    Baby Boomers are on the brink of retirement. According to U.S. Census Bureau projections, the number of people aged 65 and over will more than double in the coming decades, growing from 35 million in 2000 to 72 million in ...

  2. Transportation, Aging and Disposal Canister System Performance

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently AskedEnergyIssuesEnergyTransportation Work Package Reports |Atlanta,

  3. Restructuring and aging in a capillary suspension

    E-Print Network [OSTI]

    Erin Koos; Wolfgang Kannowade; Norbert Willenbacher

    2014-10-16T23:59:59.000Z

    The rheological properties of capillary suspensions, suspensions with small amounts of an added immiscible fluid, are dramatically altered with the addition of the secondary fluid. We investigate a capillary suspension to determine how the network ages and restructures at rest and under applied external shear deformation. The present work uses calcium carbonate suspended in silicone oil (11 % solids) with added water as a model system. Aging of capillary suspensions and their response to applied oscillatory shear is distinctly different from particulate gels dominated by the van der Waals forces. The suspensions dominated by the capillary force are very sensitive to oscillatory flow, with the linear viscoelastic regime ending at a deformation of only 0.1 % and demonstrating power-law aging behavior. This aging persists for long times at low deformations or for shorter times with a sudden decrease in the strength at higher deformations. This aging behavior suggests that the network is able to rearrange and even rupture. This same sensitivity is not demonstrated in shear flow where very high shear rates are required to rupture the agglomerates returning the apparent viscosity of capillary suspensions to the same viscosity as for the pure vdW suspension. A transitional region is also present at intermediate water contents wherein the material response depends very strongly on the type, strength, and duration of the external forcing.

  4. Multisensory integration of social information in adult aging

    E-Print Network [OSTI]

    Hunter, Edyta Monika

    2011-01-01T23:59:59.000Z

    Efficient navigation of our social world depends on the generation, interpretation and combination of social signals within different sensory systems. However, the influence of adult aging on cross-modal integration of emotional stimuli remains...

  5. AGING FACILITY WORKER DOSE ASSESSMENT

    SciTech Connect (OSTI)

    R.L. Thacker

    2005-03-24T23:59:59.000Z

    The purpose of this calculation is to estimate radiation doses received by personnel working in the Aging Facility performing operations to transfer aging casks to the aging pads for thermal and logistical management, stage empty aging casks, and retrieve aging casks from the aging pads for further processing in other site facilities. Doses received by workers due to aging cask surveillance and maintenance operations are also included. The specific scope of work contained in this calculation covers both collective doses and individual worker group doses on an annual basis, and includes the contributions due to external and internal radiation from normal operation. There are no Category 1 event sequences associated with the Aging Facility (BSC 2004 [DIRS 167268], Section 7.2.1). The results of this calculation will be used to support the design of the Aging Facility and to provide occupational dose estimates for the License Application. The calculations contained in this document were developed by Environmental and Nuclear Engineering of the Design and Engineering Organization and are intended solely for the use of the Design and Engineering Organization in its work regarding facility operation. Yucca Mountain Project personnel from the Environmental and Nuclear Engineering should be consulted before use of the calculations for purposes other than those stated herein or use by individuals other than authorized personnel in Environmental and Nuclear Engineering.

  6. Bioinformatician position available Integrative Genomics of Ageing Group, University of Liverpool

    E-Print Network [OSTI]

    Bioinformatician position available Integrative Genomics of Ageing Group, University of Liverpool A bioinformatician position is available in the Integrative Genomics of Ageing Group at the University of Liverpool) systems biology, functional genomics, network analysis, and genome evolution. Applicants should have

  7. Blind teen-age students' expectations Focus: school-age

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Blind teen-age students' expectations Focus: school-age Topic: What are the changing demands disabled pupils, inclusion increased significantly, particularly in high schools. Blind learners, who used. For this lecture, I will present a few blind students' opinions, which will help building the items for the case

  8. SteamMaster: Steam System Analysis Software

    E-Print Network [OSTI]

    Wheeler, G.

    2003-01-01T23:59:59.000Z

    recommendations to increase steam system effic iency. Steam System Opportunities ]n nearly 400 industrial assessments, we have recommended 210 steam system improvements, excluding heat recovery, that would save $1.5 million/year with a O.4-year payback. 75...

  9. Invariance of Structure in an Aging Colloidal Glass

    E-Print Network [OSTI]

    Gianguido C. Cianci; Rachel E. Courtland; Eric R. Weeks

    2005-11-11T23:59:59.000Z

    We study concentrated colloidal suspensions, a model system which has a glass transition. The non-equilibrium nature of the glassy state is most clearly highlighted by aging -- the dependence of the system's properties on the time elapsed since vitrification. Fast laser scanning confocal microscopy allows us to image a colloidal glass and track the particles in three dimensions. We analyze the static structure in terms of tetrahedral packing. We find that while the aging of the suspension clearly affects its dynamics, none of the geometrical quantities associated with tetrahedra change with age.

  10. The Evolution of the M_BH-sigma relation Inferred from the Age Distribution of Local Early-Type Galaxies and AGN Evolution

    E-Print Network [OSTI]

    Shankar, Francesco; Haiman, Zoltan

    2008-01-01T23:59:59.000Z

    We utilize the local velocity dispersion function (VDF) of spheroids, together with their inferred age--distributions, to predict the VDF at higher redshifts (01.3 excluded at the 99% confidence level. A direct match between the characteristic BH mass in the VDF--based and quasar LF--based BH mass functions also yields a mean Eddington ratio of lambda ~ 0.5-1 that is roughly constant within 00.23 for alpha>1.5. abridged

  11. Theoretical foundation for measuring the groundwater age distribution.

    SciTech Connect (OSTI)

    Gardner, William Payton; Arnold, Bill Walter

    2014-01-01T23:59:59.000Z

    In this study, we use PFLOTRAN, a highly scalable, parallel, flow and reactive transport code to simulate the concentrations of 3H, 3He, CFC-11, CFC-12, CFC-113, SF6, 39Ar, 81Kr, 4He and themean groundwater age in heterogeneous fields on grids with an excess of 10 million nodes. We utilize this computational platform to simulate the concentration of multiple tracers in high-resolution, heterogeneous 2-D and 3-D domains, and calculate tracer-derived ages. Tracer-derived ages show systematic biases toward younger ages when the groundwater age distribution contains water older than the maximum tracer age. The deviation of the tracer-derived age distribution from the true groundwater age distribution increases with increasing heterogeneity of the system. However, the effect of heterogeneity is diminished as the mean travel time gets closer the tracer age limit. Age distributions in 3-D domains differ significantly from 2-D domains. 3D simulations show decreased mean age, and less variance in age distribution for identical heterogeneity statistics. High-performance computing allows for investigation of tracer and groundwater age systematics in high-resolution domains, providing a platform for understanding and utilizing environmental tracer and groundwater age information in heterogeneous 3-D systems. Groundwater environmental tracers can provide important constraints for the calibration of groundwater flow models. Direct simulation of environmental tracer concentrations in models has the additional advantage of avoiding assumptions associated with using calculated groundwater age values. This study quantifies model uncertainty reduction resulting from the addition of environmental tracer concentration data. The analysis uses a synthetic heterogeneous aquifer and the calibration of a flow and transport model using the pilot point method. Results indicate a significant reduction in the uncertainty in permeability with the addition of environmental tracer data, relative to the use of hydraulic measurements alone. Anthropogenic tracers and their decay products, such as CFC11, 3H, and 3He, provide significant constraint oninput permeability values in the model. Tracer data for 39Ar provide even more complete information on the heterogeneity of permeability and variability in the flow system than the anthropogenic tracers, leading to greater parameter uncertainty reduction.

  12. Adapting Dry Cask Storage for Aging at a Geologic Repository

    SciTech Connect (OSTI)

    C. Sanders; D. Kimball

    2005-08-02T23:59:59.000Z

    A Spent Nuclear Fuel (SNF) Aging System is a crucial part of operations at the proposed Yucca Mountain repository in the United States. Incoming commercial SNF that does not meet thermal limits for emplacement will be aged on outdoor pads. U.S. Department of Energy SNF will also be managed using the Aging System. Proposed site-specific designs for the Aging System are closely based upon designs for existing dry cask storage (DCS) systems. This paper evaluates the applicability of existing DCS systems for use in the SNF Aging System at Yucca Mountain. The most important difference between existing DCS facilities and the Yucca Mountain facility is the required capacity. Existing DCS facilities typically have less than 50 casks. The current design for the aging pad at Yucca Mountain calls for a capacity of over 2,000 casks (20,000 MTHM) [1]. This unprecedented number of casks poses some unique problems. The response of DCS systems to off-normal and accident conditions needs to be re-evaluated for multiple storage casks. Dose calculations become more complicated, since doses from multiple or very long arrays of casks can dramatically increase the total boundary dose. For occupational doses, the geometry of the cask arrays and the order of loading casks must be carefully considered in order to meet ALARA goals during cask retrieval. Due to the large area of the aging pad, skyshine must also be included when calculating public and worker doses. The expected length of aging will also necessitate some design adjustments. Under 10 CFR 72.236, DCS systems are initially certified for a period of 20 years [2]. Although the Yucca Mountain facility is not intended to be a storage facility under 10 CFR 72, the operational life of the SNF Aging System is 50 years [1]. Any cask system selected for use in aging will have to be qualified to this design lifetime. These considerations are examined, and a summary is provided of the adaptations that must be made in order to use DCS technologies successfully at a geologic repository.

  13. aging society aging: Topics by E-print Network

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

    3 Age CiteSeer Summary: Success in school can be a positive counterweight to the abuse, neglect, separation, and impermanence experienced by the more than 400,000 U.S....

  14. Cell Senescence: Aging and Cancer

    ScienceCinema (OSTI)

    Campisi, Judith

    2013-05-29T23:59:59.000Z

    Scientists have identified a molecular cause behind the ravages of old age and in doing so have also shown how a natural process for fighting cancer in younger persons can actually promote cancer in older individuals.

  15. Malcolm Guite Poets in Age

    E-Print Network [OSTI]

    Robertson, Stephen

    Malcolm Guite Poets in Age or A Study of Reading Habits At first I used to wish that I were Keats passing bell is rung. But now I need the poets who grew old And wore the bottoms of their trousers rolled of pure gold. I need the poets now, who match my age, Like Coleridge I could become a sage, And I bet I

  16. ON THE LINEAR GROWTH OF THE SPLITANDMERGE SIMULATION TREE FOR A MULTICOMPONENT AGE REPLACEMENT MODEL

    E-Print Network [OSTI]

    Vázquez-Abad, Felisa J.

    ON THE LINEAR GROWTH OF THE SPLIT­AND­MERGE SIMULATION TREE FOR A MULTICOMPONENT AGE REPLACEMENT Functional estimation, split­and­merge tree, opti­ mization, maintenance models, age replacement poli­ cies Abstract We a consider a replacement policy based on age thresholds, for a multicomponent system. We want

  17. THE AGE OF PLASTIC INGENUITY + RESPONSIBILITY

    E-Print Network [OSTI]

    Mathis, Wayne N.

    THE AGE OF PLASTIC INGENUITY + RESPONSIBILITY An Interdisciplinary Symposium Stone Age, Bronze Age, Iron Age...and now the Age of Plastic. The Smithsonian Institution is leveraging its collections--arguably the world's greatest repository of plastic material culture--to investigate the significance of plastic, its

  18. An assessment of fire vulnerability for aged electrical relays

    SciTech Connect (OSTI)

    Vigil, R.A. [Sandia National Labs., Albuquerque, NM (United States)]|[Science and Engineering Associates, Inc., Albuquerque, NM (United States); Nowlen, S.P. [Sandia National Labs., Albuquerque, NM (United States)

    1995-03-01T23:59:59.000Z

    There has been some concern that, as nuclear power plants age, protective measures taken to control and minimize the impact of fire may become ineffective, or significantly less effective, and hence result in an increased fire risk. One objective of the Fire Vulnerability of Aged Electrical Components Program is to assess the effects of aging and service wear on the fire vulnerability of electrical equipment. An increased fire vulnerability of components may lead to an overall increase in fire risk to the plant. Because of their widespread use in various electrical safety systems, electromechanical relays were chosen to be the initial components for evaluation. This test program assessed the impact of operational and thermal aging on the vulnerability of these relays to fire-induced damage. Only thermal effects of a fire were examined in this test program. The impact of smoke, corrosive materials, or fire suppression effects on relay performance were not addressed in this test program. The purpose of this test program was to assess whether the fire vulnerability of electrical relays increased with aging. The sequence followed for the test program was to: identify specific relay types, develop three fire scenarios, artificially age several relays, test the unaged and aged relays in the fire exposure scenarios, and compare the results. The relays tested were Agastat GPI, General Electric (GE) HMA, HGA, and HFA. At least two relays of each type were artificially aged and at least two relays of each type were new. Relays were operationally aged by cycling the relay under rated load for 2,000 operations. These relays were then thermally aged for 60 days with their coil energized.

  19. June 17, 2013 Symposium on Aging

    E-Print Network [OSTI]

    Church, George M.

    to forestall and treat diseases of aging such as diabetes, cancer, Alzheimer's and heart disease. Today

  20. advanced grandparental age: Topics by E-print Network

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

    In most animals, advancing age is accompanied by the deteriorative process of aging (senescence). Aging is the main cause of severe illness and death in humans aging is...

  1. advancing paternal age: Topics by E-print Network

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

    In most animals, advancing age is accompanied by the deteriorative process of aging (senescence). Aging is the main cause of severe illness and death in humans aging is...

  2. advanced paternal age: Topics by E-print Network

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

    In most animals, advancing age is accompanied by the deteriorative process of aging (senescence). Aging is the main cause of severe illness and death in humans aging is...

  3. Chelation: A Fundamental Mechanism of Action of AGE Inhibitors...

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

    Mechanism of Action of AGE Inhibitors, AGE Breakers, and Other Inhibitors of Diabetes Complications. Chelation: A Fundamental Mechanism of Action of AGE Inhibitors, AGE...

  4. Systems

    E-Print Network [OSTI]

    Chapter 1. Systems. 1.1. On Line. In this introductory section we will pose no exercises, but instead, will detail. how to use Maple to solve problems in linear...

  5. Brain surgery breathes new life into aging plants

    SciTech Connect (OSTI)

    Makansi, J. [Pearl Street Inc. (United States)

    2006-04-15T23:59:59.000Z

    Unlike managing the human aging process, extending the life of a power plant often includes brain surgery, modernizing its control and automation system. Lately, such retrofits range from wholesale replacing of existing controls to the addition of specific control elements that help optimize performance. Pending revisions to safety codes and cybersecurity issues also need to be considered. 4 figs.

  6. Aging and Top-Down Attentional Control in Visual Search

    E-Print Network [OSTI]

    McShea, Daniel W.

    systems that bias the gating of this featural information to later processing stages such as objectApril 2010 Aging and Top-Down Attentional Control in Visual Search Project Leads David J. Madden Security (DHS) to be able to assess and maintain this skill set in those employed as baggage screeners

  7. Aging phenomena in polystyrene thin films

    E-Print Network [OSTI]

    Koji Fukao; Hiroki Koizumi

    2008-01-05T23:59:59.000Z

    The aging behavior is investigated for thin films of atactic polystyrene through measurements of complex electric capacitance. During isothermal aging process the real part of the electric capacitance increases with aging time, while the imaginary part decreases with aging time. This result suggests that the aging time dependence of the real and imaginary parts are mainly associated with change in thickness and dielectric permittivity, respectively. In thin films, the thickness depends on thermal history of aging even above the glass transition. Memory and `rejuvenation' effects are also observed in the thin films.

  8. Aging of Pentaerythritol Tetranitrate (PETN)

    SciTech Connect (OSTI)

    Foltz, M F

    2009-04-22T23:59:59.000Z

    Pentaerythritol tetranitrate (PETN) is a relatively sensitive explosive used in many electroexplosive devices as well as in medicine. Of primary interest to LLNL is its use in items such as exploding bridgewire (EBW) detonators and exploding bridge foil initiators (EFI). In these devices the crystalline powder is pressed into a granular, low-density compact that can be initiated by an exploding wire or foil. The long-term stability of this pressed compact is of interest to weapon stockpile lifetime prediction studies. Key points about potential aging mechanisms can be summarized as follows: (1) There are a number of factors that can contribute to PETN instability. These include particle size, polymorphic phase transitions, crystal structure, impurities, moisture, occlusions, chemical incompatibility and biological (microorganism) action. of these factors the most important for long-term aging of high surface area powders used in detonators appears to be that of particle size growth. (2) There is a great deal of literature on the thermal degradation kinetics of PETN, unfortunately much of it with little bearing on ambient temperature aging during long-term storage. PETN is very stable with respect to thermal decomposition. Low-temperature thermal studies have not revealed evidence of chemical degradation products in archived PETN. Data extrapolated to 30 C predicts a half-life of 12 million years. (3) Moisture seems to lower the activation energy for and accelerate the decomposition of PETN. (4) External drivers affecting stability include temperature, moisture, radiation fields, and stress, while internal drivers include residual solvents, and impurities. Temperature affects kinetic processes of crystal growth such as adsorption, desorption, and diffusion rates of molecules on the surface of PETN crystals. A low-level radiation field may induce unexpected changes in the chemical makeup of PETN and its homologue impurities. Stress at high pressure points caused by crystalline surface irregularities may cause a decrease in surface area over time due to smoothing of contact points and sintering. PETN has been found to contain a number of impurities, including homologues, pentaerythryl ethers with a mixture of hydroxyl and nitrate functional groups, and organic salts, that can alter its physical and chemical properties. (5) The processes of sublimation/recrystallization and surface diffusion are important processes that can cause changes in PETN crystal morphology, particle size distribution and specific surface area. Sublimation feeds a process called Ostwald ripening, which involves the spontaneous growth of larger crystals from those of smaller size. This process proceeds with age regardless of storage conditions unless the crystals are treated to retard growth. The coarsening mechanisms include Ostwald ripening, 'sintering', and surface diffusion. The latter has not been experimentally observed, but a molecular modeling approach has attempted to investigate this phenomenon theoretically. (6) Threshold test fire, particle size distribution, specific surface area, thermal analysis, chemical analysis, powder compact specific surface area and density are approaches that have been used in the attempt to assess changes attributable to aging of PETN, with varying results. The biggest problem lies in the aging mechanism itself, which likely influences small changes in morphology, both internal and external, and particle size distribution changes on a scale too small to reliably monitor. Other aspects, such as subtle changes in density profiles within pressed powder compacts, may be beyond the capability of current technology to assess. Crystal growth significant enough to affect the PETN particle size distribution is expected to impact detonator performance. (7) Factors relevant to stabilizing particle size growth include crystal morphology, powder surface area and particle size distribution; crystal density and internal defects; and powder compact density and density gradients.

  9. Accelerated Aging of Roofing Surfaces

    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 DataDepartment of Energy Your Density Isn't Your Destiny: The Future of1 AAccelerated aging of roofing surfaces Hugo Destaillats, Ph.D.

  10. Neurobiology of Aging xxx (2006) xxxxxx Age-related changes in brain activation during

    E-Print Network [OSTI]

    2006-01-01T23:59:59.000Z

    Neurobiology of Aging xxx (2006) xxxxxx Age-related changes in brain activation during a delayed. / Neurobiology of Aging xxx (2006) xxxxxx impairment in several different memory variables [78], including WM [9

  11. Chloride Depletion in Aged Sea Salt Particles

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

    Chloride Depletion in Aged Sea Salt Particles Chloride Depletion in Aged Sea Salt Particles Print Wednesday, 06 February 2013 00:00 Particles or aerosols can be directly released...

  12. Dark Energy in the Dark Ages

    E-Print Network [OSTI]

    Linder, Eric V.

    2009-01-01T23:59:59.000Z

    LBNL- 61876 Dark Energy in the Dark Ages Eric V. LinderUniversity of California. Dark Energy in the Dark Ages Eric2008) Non-negligible dark energy density at high redshifts

  13. Utah Commission on Aging June 6, 2007

    E-Print Network [OSTI]

    Tipple, Brett

    Institutions Norma Matheson Chair Anne Peterson University of Utah Mayor JoAnn Seghini Midvale City Sara to the Commission for consideration. Aging SMART: Denise Brooks distributed Aging SMART Sourcebook. Website is up

  14. Protection of rubbers against aging with the use of structural, diffusion and kinetic effects

    SciTech Connect (OSTI)

    Kablov, V. F., E-mail: kablov@volpi.ru [Volzhsky Polytechnical Institute (branch) Volgograd State Technical University, 42a Engelsa Street, 404121, Volzhsky, Volgograd Region (Russian Federation); Zaikov, G. E., E-mail: chembio@sky.chph.ras.ru [N.M. Emanuel Institute of Biochemical Physics Russian Academy of Sciences, Leninskii prospect 64-188, 119296, Moscow (Russian Federation)

    2014-05-15T23:59:59.000Z

    Processes of rubber aging in the different kinetic modes and mathematical models of the processes including aging and destruction processes under extreme conditions have been studied. The aging process for rubbers as thermodynamically open nonlinear systems has also been considered in the paper. It has been revealed that the aging process can be controlled by the internal physical-chemical processes organization and by creation of external influences (by organization of thermodynamic forces and flows). According to the Onsager principle, in certain conditions of aging the conjugation of thermodynamic forces and flows is possible. The diffusion and structural aspects of aging in elastomeric rubbers and articles thereof have been considered. The composite antiaging systems of prolonged action based on the use of microparticles with a saturated solution of the antiagers migrating into an elastomeric matrix at the exploitation have been proposed.

  15. National Environmental Policy Act (NEPA) Categorically Excluded...

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

    Monitoring Wells South of the Tuba City, Arizona, Uranium Mill Tailing Remedial Action (UMTRA) Title I Ste 05282013 B1.3 LM 01-13 Current and Future Actions Related to...

  16. age randomised controlled: Topics by E-print Network

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

    98504-3144 An age-length key (ALK) is the tra- ditional method for estimating age-stage length samples for relatively costly age determination (age subsamplel. Age...

  17. aged rat erectile: Topics by E-print Network

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

    98504-3144 An age-length key (ALK) is the tra- ditional method for estimating age-stage length samples for relatively costly age determination (age subsamplel. Age...

  18. age factors: Topics by E-print Network

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

    98504-3144 An age-length key (ALK) is the tra- ditional method for estimating age-stage length samples for relatively costly age determination (age subsamplel. Age...

  19. aged interleukin-18 deficient: Topics by E-print Network

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

    98504-3144 An age-length key (ALK) is the tra- ditional method for estimating age-stage length samples for relatively costly age determination (age subsamplel. Age...

  20. age stratigraphic relationships: Topics by E-print Network

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

    98504-3144 An age-length key (ALK) is the tra- ditional method for estimating age-stage length samples for relatively costly age determination (age subsamplel. Age...

  1. 6, 39453963, 2006 Methanol inside aged

    E-Print Network [OSTI]

    ACPD 6, 39453963, 2006 Methanol inside aged tropical biomass burning plumes G. Dufour et al. Title Chemistry and Physics Discussions First space-borne measurements of methanol inside aged tropical biomass. Dufour (gaelle.dufour@lmd.polytechnique.fr) 3945 #12;ACPD 6, 39453963, 2006 Methanol inside aged

  2. Piezoelectric Wafer Embedded Active Sensors for Aging Aircraft Structural Health Monitoring

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    41 Piezoelectric Wafer Embedded Active Sensors for Aging Aircraft Structural Health Monitoring ends with a conceptual design of a structural health monitoring system and suggestions for aging damage detection structural health monitoring failure prevention ultrasonics pulse-echo emitter

  3. aged korean adults: Topics by E-print Network

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

    AGING & SOCIETY Engineering Websites Summary: DEPARTMENT OF HEALTH, AGING & SOCIETY Monthly Speaker Series Dr. Ellen B. Ryan DATE TIME ROOM Department of Health, Aging, &...

  4. Characterization of Field-Aged Exhaust Gas Recirculation Cooler...

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

    Field-Aged Exhaust Gas Recirculation Cooler Deposits Characterization of Field-Aged Exhaust Gas Recirculation Cooler Deposits Characterized field-aged exhaust gas recirculation...

  5. Local Land-Use Controls and Aging-Friendliness

    E-Print Network [OSTI]

    Rosenthal, Larry A.

    2009-01-01T23:59:59.000Z

    A. 2001. Aging and Smart Growth: Building Aging-Sensitivebuilding such product exclusively, or predominantly, because it creates homogenous-age zones, defeats smart-

  6. Aging behavior and lifetime modeling for polycarbonate

    SciTech Connect (OSTI)

    Kahlen, S. [Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, Leoben 8700 (Austria); Wallner, G.M. [Institute of Materials Science and Testing of Plastics, University of Leoben, Franz-Josef Strasse 18, Leoben 8700 (Austria); Lang, R.W. [Institute for Polymeric Materials and Testing, University of Linz, Altenbergerstrasse 69, Linz 4040 (Austria)

    2010-05-15T23:59:59.000Z

    In this paper, polycarbonate (PC) as a material candidate for solar absorber applications is investigated as to the aging behavior at different temperatures in air and water. The aging conditioning was performed in air in the temperature range from 120 to 140 C and in water between 70 and 95 C. Tensile tests were performed on unaged and aged PC film specimens at ambient temperature using strain-to-break values as a performance indicator for the degree of aging. For PC the effect of aging was found to strongly depend on the aging conditions. Activation energy based lifetime prediction models according to various methods described in the literature were applied. The activation energies and corresponding lifetime predictions for the temperature range from 40 to 60 C in water and from 90 to 110 C in air derived from these models are compared and interpreted as to their practical relevance. (author)

  7. Liquid metal cooled nuclear reactor plant system

    DOE Patents [OSTI]

    Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA)

    1993-01-01T23:59:59.000Z

    A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting for fuel decay during reactor shutdown, or heat produced during a mishap. The reactor system is enhanced with sealing means for excluding external air from contact with the liquid metal coolant leaking from the reactor vessel during an accident. The invention also includes a silo structure which resists attack by leaking liquid metal coolant, and an added unique cooling means.

  8. Materials Research in the Information Age

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

    Materials Research in the Information Age Accelerating Advanced Material Development NERSC Science Gateway a 'Google of Material Properties' October 31, 2011 | Tags: Materials...

  9. Features, Events, and Processes: system Level

    SciTech Connect (OSTI)

    D. McGregor

    2004-10-15T23:59:59.000Z

    The purpose of this analysis report is to evaluate and document the inclusion or exclusion of the system-level features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment for the license application (TSPA-LA). A screening decision, either Included or Excluded, is given for each FEP along with the technical basis for screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.113 (d, e, and f) (DIRS 156605). The system-level FEPs addressed in this report typically are overarching in nature, rather than being focused on a particular process or subsystem. As a result, they are best dealt with at the system level rather than addressed within supporting process-level or subsystem-level analyses and models reports. The system-level FEPs also tend to be directly addressed by regulations, guidance documents, or assumptions listed in the regulations; or are addressed in background information used in development of the regulations. For included FEPs, this analysis summarizes the implementation of the FEP in the TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from the TSPA-LA (i.e., why the FEP is excluded). The initial version of this report (Revision 00) was developed to support the total system performance assessment for site recommendation (TSPA-SR). This revision addresses the license application (LA) FEP List (DIRS 170760).

  10. LIGA microsystems aging : evaluation and mitigation.

    SciTech Connect (OSTI)

    Cadden, Charles H.; Yang, Nancy Y. C.; San Marchi, Christopher W.

    2003-12-01T23:59:59.000Z

    The deployment of LIGA structures in DP applications requires a thorough understanding of potential long term physical and chemical changes that may occur during service. While these components are generally fabricated from simple metallic systems such as copper, nickel and nickel alloys, the electroplating process used to form them creates microstructural features which differ from those found in conventional (e.g. ingot metallurgy) processing of such materials. Physical changes in non-equilibrium microstructures may occur due to long term exposure to temperatures sufficient to permit atomic and vacancy mobility. Chemical changes, particularly at the surfaces of LIGA parts, may occur in the presence of gaseous chemical species (e.g. water vapor, HE off-gassing compounds) and contact with other metallic structures. In this study, we have characterized the baseline microstructure of several nickel-based materials that are used to fabricate LIGA structures. Solute content and distribution was found to have a major effect on the electroplated microstructures. Microstructural features were correlated to measurements of hardness and tensile strength. Dormancy testing was conducted on one of the baseline compositions, nickel-sulfamate. Groups of specimens were exposed to controlled thermal cycles; subsequent examinations compared properties of 'aged' specimens to the baseline conditions. Results of our testing indicate that exposure to ambient temperatures (-54 C to 71 C) do not result in microstructural changes that might be expected to significantly effect mechanical performance. Additionally, no localized changes in surface appearance were found as a result of contact between electroplated parts.

  11. age reconsidering ovarian: Topics by E-print Network

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

    age-length key to estimate age Environmental Sciences and Ecology Websites Summary: Optimal sampling design for using the age-length key to estimate age composition of a fish...

  12. New age constraints on the Middle Stone Age occupations of Kharga Oasis, Western Desert, Egypt

    E-Print Network [OSTI]

    Asmerom, Yemane

    New age constraints on the Middle Stone Age occupations of Kharga Oasis, Western Desert, Egypt rocks, or tufas, exposed along the flanks of the Libyan Plateau near Kharga Oasis, Western Desert, Egypt

  13. Lattice Percolation Approach to Numerical Modeling of Tissue Aging

    E-Print Network [OSTI]

    Privman, Vladimir; Libert, Sergiy

    2015-01-01T23:59:59.000Z

    We describe a percolation-type approach to modeling of the processes of aging and certain other properties of tissues analyzed as systems consisting of interacting cells. Tissues are considered as structures made of regular healthy, senescent, dead (apoptotic) cells, and studied dynamically, with the ongoing processes including regular cell division to fill vacant sites left by dead cells, healthy cells becoming senescent or dying, and other processes. Statistical-mechanics description can provide patterns of time dependence and snapshots of morphological system properties. An illustrative application of the developed theoretical modeling approach is reported, confirming recent experimental findings that inhibition of senescence can lead to extended lifespan.

  14. A 4D geometrical modeling of a material aging

    E-Print Network [OSTI]

    A. Chudnovsky; S. Preston

    2006-04-16T23:59:59.000Z

    4-dim intrinsic (material) Riemannian metric $G$ of the material 4-D space-time continuum $P$ is utilized as the characteristic of the aging processes developing in the material. Manifested through variation of basic material characteristics such as density, moduli of elasticity, yield stress, strength, and toughness., the aging process is modeled as the evolution of the metric $G$ (most importantly of its time component $G_{00}$) of the material space-time $P$ embedded into 4-D Newtonian space-time with Euclidean metric.\\par The evolutional equation for metric $G$ is derived by the classical variational approach. Construction of a Lagrangian for an aging elastic media and the derivation of a system of coupled elastostatic and aging equations constitute the central part of the work. The external and internal balance laws associated with symmetries of material and physical space-time geometries are briefly reviewed from a new viewpoint presented in the paper. Examples of the stress relaxation and creep of a homogeneous rod, cold drawing, and chemical degradation in a tubing are discussed.

  15. Effect of aging upon CE and B and W control rod drives

    SciTech Connect (OSTI)

    Grove, E.; Gunther, W.

    1992-01-01T23:59:59.000Z

    The effect of aging upon the Babcock Wilcox (B W) and Combustion Engineering (CE) Control Rod Drive (CRD) systems has been evaluated as part of the US NRC Nuclear Plant Aging Research (NPAR) program. Operating experience data for the 1980--1990 time period was reviewed to identify predominant failure modes, causes, and effects. These results, in conjunction with an assessment of component materials and operating environment, conclude that both systems are susceptible to age degradation. System failures have resulted in significant plant effects, including power reductions, plant shutdowns, scrams, and Engineered Safety Feature (ESF) actuation. Current industry inspection and maintenance practices were assessed. Some of these practices effectively address aging, while others do not.

  16. Effect of aging upon CE and B and W control rod drives

    SciTech Connect (OSTI)

    Grove, E.; Gunther, W.

    1992-05-01T23:59:59.000Z

    The effect of aging upon the Babcock & Wilcox (B&W) and Combustion Engineering (CE) Control Rod Drive (CRD) systems has been evaluated as part of the US NRC Nuclear Plant Aging Research (NPAR) program. Operating experience data for the 1980--1990 time period was reviewed to identify predominant failure modes, causes, and effects. These results, in conjunction with an assessment of component materials and operating environment, conclude that both systems are susceptible to age degradation. System failures have resulted in significant plant effects, including power reductions, plant shutdowns, scrams, and Engineered Safety Feature (ESF) actuation. Current industry inspection and maintenance practices were assessed. Some of these practices effectively address aging, while others do not.

  17. MINED GEOLOGIC DISPOSAL SYSTEM (MGDS) MONITORING & CONTROL SYSTEMS CENTRALIZATION TECHNICAL REPORT

    SciTech Connect (OSTI)

    M.J. McGrath

    1998-03-31T23:59:59.000Z

    The objective of this report is to identify and document Mined Geologic Disposal System (MGDS) requirements for centralized command and control. Additionally, to further develop the MGDS monitoring and control functions. This monitoring and control report provides the following information: (1) Determines the applicable requirements for a monitoring and control system for repository operations and construction (excluding Performance Confirmation). (2) Makes a determination as to whether or not centralized command and control is required.

  18. Nuclear power plant Generic Aging Lessons Learned (GALL). Main report and appendix A

    SciTech Connect (OSTI)

    Kaza, K.E.; Diercks, D.R.; Holland, J.W.; Choi, S.U. [and others

    1996-12-01T23:59:59.000Z

    The purpose of this generic aging lessons learned (GALL) review is to provide a systematic review of plant aging information in order to assess materials and component aging issues related to continued operation and license renewal of operating reactors. Literature on mechanical, structural, and thermal-hydraulic components and systems reviewed consisted of 97 Nuclear Plant Aging Research (NPAR) reports, 23 NRC Generic Letters, 154 Information Notices, 29 Licensee Event Reports (LERs), 4 Bulletins, and 9 Nuclear Management and Resources Council Industry Reports (NUMARC IRs) and literature on electrical components and systems reviewed consisted of 66 NPAR reports, 8 NRC Generic Letters, 111 Information Notices, 53 LERs, 1 Bulletin, and 1 NUMARC IR. More than 550 documents were reviewed. The results of these reviews were systematized using a standardized GALL tabular format and standardized definitions of aging-related degradation mechanisms and effects. The tables are included in volume s 1 and 2 of this report. A computerized data base has also been developed for all review tables and can be used to expedite the search for desired information on structures, components, and relevant aging effects. A survey of the GALL tables reveals that all ongoing significant component aging issues are currently being addressed by the regulatory process. However, the aging of what are termed passive components has been highlighted for continued scrutiny. This document is Volume 1, consisting of the executive summary, summary and observations, and an appendix listing the GALL literature review tables.

  19. A Review of Information for Managing Aging in Nuclear Power Plants

    SciTech Connect (OSTI)

    WC Morgan; JV Livingston

    1995-09-01T23:59:59.000Z

    Age related degradation effects in safety related systems of nuclear power plants should be managed to prevent safety margins from eroding below the acceptable limits provided in plant design bases. The Nuclear Plant Aging Research (NPAR) Pro- gram, conducted under the auspices of the U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research, and other related aging management programs are developing technical information on managing aging. The aging management process central to these efforts consists of three key elements: 1) selecting structures, systems, and components (SSCs) in which aging should be controlled; 2) understanding the mechanisms and rates of degradation in these SSCs; and 3) managing degradation through effective inspection, surveillance, condition monitoring, trending, record keeping, mainten- ance, refurbishment, replacement, and adjustments in the operating environment and service conditions. This document concisely reviews and integrates information developed under the NPAR Program and other aging management studies and other available information related to understanding and managing age-related degradation effects and provides specific refer- ences to more comprehensive information on the same subjects.

  20. Managing Aging Effects on Dry Cask Storage Systems for Extended...

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

    Electric Grid Workshop, April 19-20, 2011 Before the House Energy and Commerce Subcommittee on Energy and Power Effects of Multiple Drying Cycles on HBU PWR Cladding Alloys...

  1. aging visual system: Topics by E-print Network

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

    algorithm animation, software understanding, computer aideed instruction-23 October 1991 Graphics, Visualization, and Usability Center College of Computing Georgia Institute...

  2. Reliability Modeling and Evaluation in Aging Power Systems

    E-Print Network [OSTI]

    Kim, Hag-Kwen

    2010-01-14T23:59:59.000Z

    , they are different immediately after first repair. Expected value of N(t) during time t is given by (30) and probability of k events during time t? is given by (31). Equation (32) is expanded by substituting (30) in (31). )32( !k e)t?(? =)k=)t?(NPr( )31( !k e...)}t?(?{ =)k=)t?(NPr( )30(t?=du)u(?=)]t(N[E=)t(? )29(t??=)t(? ? )t?(?-k?k )t?(?-k ? t 0 1-? ? Just as in Figure 4, vertical dotted lines in Figure 5 represent the repair actions. Failure rate is, however, not renewing, instead is the same as immediately...

  3. An Accelerated Aging Method for Diesel Exhaust Aftertreatment Systems |

    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 DataDepartment of Energy Your Density Isn't Your Destiny: The Future of1Albuquerque, NM -AliciaBioenergy5.doc�Energy

  4. Aging assessment of large electric motors in nuclear power plants

    SciTech Connect (OSTI)

    Villaran, M.; Subudhi, M. [Brookhaven National Lab., Upton, NY (United States)

    1996-03-01T23:59:59.000Z

    Large electric motors serve as the prime movers to drive high capacity pumps, fans, compressors, and generators in a variety of nuclear plant systems. This study examined the stressors that cause degradation and aging in large electric motors operating in various plant locations and environments. The operating history of these machines in nuclear plant service was studied by review and analysis of failure reports in the NPRDS and LER databases. This was supplemented by a review of motor designs, and their nuclear and balance of plant applications, in order to characterize the failure mechanisms that cause degradation, aging, and failure in large electric motors. A generic failure modes and effects analysis for large squirrel cage induction motors was performed to identify the degradation and aging mechanisms affecting various components of these large motors, the failure modes that result, and their effects upon the function of the motor. The effects of large motor failures upon the systems in which they are operating, and on the plant as a whole, were analyzed from failure reports in the databases. The effectiveness of the industry`s large motor maintenance programs was assessed based upon the failure reports in the databases and reviews of plant maintenance procedures and programs.

  5. Iodine Loading of NO Aged Silver Exchanged Mordenite

    SciTech Connect (OSTI)

    Patton, K. K. [ORNL; Bruffey, S. H. [ORNL; Jubin, J. T. [ORNL; Walker, Jr., J. F. [ORNL

    2014-09-30T23:59:59.000Z

    In an off-gas treatment system for used nuclear fuel processing, a solid sorbent will typically be exposed to a gas stream for months at a time. This gas stream may be at elevated temperature and could contain water vapor, gaseous nitrogen oxides (NO{sub x}), nitric acid vapors, and a variety of other constituents. For this reason, it is important to evaluate the effects of long-term exposure, or aging, on proposed sorbents. Silver exchanged mordenite (AgZ) is being studied at Oak Ridge National Laboratory (ORNL) to determine its iodine sorption capacity after long term exposure to increasingly more complex chemical environments. Studies previously conducted at ORNL investigated the effects of aging reduced silver exchanged mordenite (Ag{sup 0}Z) in dry air, moist air, and NO2. This study investigated the effects of extended exposure to nitric oxide (NO) gas on the iodine capture performance of Ag{sup 0}Z. A deep bed of Ag{sup 0}Z was aged in a 1% nitric oxide (NO) air stream, and portions of the bed were removed at pre-determined intervals. After being removed from the NO stream, each sample was loaded with iodine in a thin bed configuration. These samples were analyzed by neutron activation analysis (NAA) to quantify the iodine content in the sample. Samples were removed at one week and one month. A 78% decrease in sample capacity was seen after one week of exposure, with no further decrease observed after 1 month of aging. The observed loss in capacity is larger in magnitude than previous studies exposing Ag{sup 0}Z to dry air, moist air, or NO2 gas. The aging study was terminated after one month and repeated; this successfully demonstrated the reproducibility of the results.

  6. June 18, 2012 Symposium on Aging

    E-Print Network [OSTI]

    Church, George M.

    , anemia, muscular dystrophy, and diabetes. The reasons for accelerating research into the molecular diseases of aging such as diabetes, cancer, Alzheimer's and heart disease. Today's attendees come not only

  7. HYGROTHERMAL AGING OF POLYIMIDE MATRIX COMPOSITE LAMINATES

    E-Print Network [OSTI]

    Nairn, John A.

    . The time to initiate water-induced microcracks, tm, (in minutes), was log .t T m = + 3423 1 35 (1) #12-ply laminates and supplied to us by the Boeing Company. For hygrothermal aging experiments, a series

  8. Aging of polymeric composites : a literature review

    E-Print Network [OSTI]

    Trevio-Garrido, Margie N

    2013-01-01T23:59:59.000Z

    Due to their increased use in today's society, an extensive survey was undertaken in this report to condense what's been, thus far, discovered as to the effects of aging on polymeric composites. Special emphasis was placed ...

  9. Managing aging in nuclear power plants: Insights from NRC maintenance team inspection reports

    SciTech Connect (OSTI)

    Fresco, A.; Subudhi, M.; Gunther, W.; Grove, E.; Taylor, J. [Brookhaven National Lab., Upton, NY (United States)

    1993-12-01T23:59:59.000Z

    A plant`s maintenance program is the principal vehicle through which age-related degradation is managed. From 1988 to 1991, the NRC evaluated the maintenance program of every nuclear power plant in the United States. Forty-four out of a total of 67 of the reports issued on these in-depth team inspections were reviewed for insights into the strengths and weaknesses of the programs as related to the need to understand and manage the effects of aging on nuclear plant systems, structures, and components. Relevant information was extracted from these inspection reports and sorted into several categories, including Specific Aging Insights, Preventive Maintenance, Predictive Maintenance and Condition Monitoring, Post Maintenance Testing, Failure Trending, Root Cause Analysis and Usage of Probabilistic Risk Assessment in the Maintenance Process. Specific examples of inspection and monitoring techniques successfully used by utilities to detect degradation due to aging have been identified. The information also was sorted according to systems and components, including: Auxiliary Feedwater, Main Feedwater, High Pressure Injection for both BWRs and PWRs, Service Water, Instrument Air, and Emergency Diesel Generator Air Start Systems, and Emergency Diesel Generators Air Start Systems, emergency diesel generators, electrical components such as switchgear, breakers, relays, and motor control centers, motor operated valves and check valves. This information was compared to insights gained from the Nuclear Plant Aging Research (NPAR) Program. Attributes of plant maintenance programs where the NRC inspectors felt that improvement was needed to properly address the aging issue also are discussed.

  10. Age determination of 15 old to intermediate-age small Magellanic cloud star clusters

    SciTech Connect (OSTI)

    Parisi, M. C.; Clari, J. J.; Piatti, A. E. [Observatorio Astronmico, Universidad Nacional de Crdoba, Laprida 854, Crdoba, CP 5000 (Argentina); Geisler, D.; Leiton, R. [Departamento de Astronoma, Universidad de Concepcin, Casilla 160-C, Concepcin (Chile); Carraro, G. [European Southern Observatory, Casilla 19001, Santiago de Chile (Chile); Costa, E. [Universidad de Chile, Casilla 36-D, Santiago de Chile (Chile); Grocholski, A. J. [Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Tower Drive, Baton Rouge, LA 70803-4001 (United States); Sarajedini, A., E-mail: celeste@oac.uncor.edu, E-mail: claria@oac.uncor.edu, E-mail: andres@oac.uncor.edu, E-mail: dgeisler@astro-udec.cl, E-mail: roger.leiton@astro-udec.cl, E-mail: gcarraro@eso.org, E-mail: costa@das.uchile.cl, E-mail: grocholski@phys.lsu.edu, E-mail: ata@astro.ufl.edu [Department of Astronomy, University of Florida, P.O. Box 112055, Gainesville, FL 32611 (United States)

    2014-04-01T23:59:59.000Z

    We present color-magnitude diagrams in the V and I bands for 15 star clusters in the Small Magellanic Cloud (SMC) based on data taken with the Very Large Telescope (VLT, Chile). We selected these clusters from our previous work, wherein we derived cluster radial velocities and metallicities from calcium II infrared triplet (CaT) spectra also taken with the VLT. We discovered that the ages of six of our clusters have been appreciably underestimated by previous studies, which used comparatively small telescopes, graphically illustrating the need for large apertures to obtain reliable ages of old and intermediate-age SMC star clusters. In particular, three of these clusters, L4, L6, and L110, turn out to be among the oldest SMC clusters known, with ages of 7.9 1.1, 8.7 1.2, and 7.6 1.0 Gyr, respectively, helping to fill a possible 'SMC cluster age gap'. Using the current ages and metallicities from Parisi et al., we analyze the age distribution, age gradient, and age-metallicity relation (AMR) of a sample of SMC clusters measured homogeneously. There is a suggestion of bimodality in the age distribution but it does not show a constant slope for the first 4 Gyr, and we find no evidence for an age gradient. Due to the improved ages of our cluster sample, we find that our AMR is now better represented in the intermediate/old period than we had derived in Parisi et al., where we simply took ages available in the literature. Additionally, clusters younger than ?4 Gyr now show better agreement with the bursting model of Pagel and Tautvaiien?, but we confirm that this model is not a good representation of the AMR during the intermediate/old period. A more complicated model is needed to explain the SMC chemical evolution in that period.

  11. COMPARISON BETWEEN FRESH AND AGED MUNICIPAL SOLID WASTES AND THEIR RECYCLING METHODS IN CHINA

    E-Print Network [OSTI]

    G. Zhou; D. Chen; W. Cui

    2007-01-01T23:59:59.000Z

    SUMMARY: Fresh municipal solid wastes (MSW) and aged MSW including MSW from landfills and dumpsite have been characterized and compared by their components, moisture content and lower heat value (LHV) in order to recycle and dispose them properly. Firstly the characterizing experiments were performed and the results showed that generally the fresh MSW are of high moisture contents and their LHV is below 6500kJ/kg; and when 40 % of plastics were separated, their LHV is less than 5000kJ/kg. Combustibles in aged MSW were easily to be separated and their LHV is higher than 11000kJ/kg as just separated. Analysis of aged MSW of different years old showed that as MSW became older the moisture and paper contents decreased. No leachate produced from aged MSW during the analysis and separation process. For both fresh MSW and aged MSW the main contributor to LHV is plastics. Secondly a simple separating system consisting of a roller screen and a winnower is used to separate plastics from fresh MSW and aged MSW, and the quality of plastics were compared by their physical parameters after made into pellets; the results showed that plastics from fresh MSW can be recycled as raw material for secondary product; while plastics separated from aged MSW are of lower quality and only suitable to be recycled as fuel material. Finally different recycling methods were suggested for fresh and aged MSWs based on their characteristics. 1.

  12. Solid Friction from stick-slip to pinning and aging

    E-Print Network [OSTI]

    Tristan Baumberger; Christiane Caroli

    2005-06-24T23:59:59.000Z

    We review the present state of understanding of solid friction at low velocities and for systems with negligibly small wear effects. We first analyze in detail the behavior of friction at interfaces between wacroscopic hard rough solids, whose main dynamical features are well described by the Rice-Ruina rate and state dependent constitutive law. We show that it results from two combined effects : (i) the threshold rheology of nanometer-thick junctions jammed under confinement into a soft glassy structure (ii) geometric aging, i.e. slow growth of the real arrea of contact via asperity creep interrupted by sliding. Closer analysis leads to identifying a second aging-rejuvenation process, at work within the junctions themselves. We compare the effects of structural aging at such multicontact, very highly confined, interfaces with those met under different confinement levels, namely boundary lubricated contacts and extended adhesive interfaces involving soft materials (hydrogels, elastomers). This leads us to propose a classification of frictional junctions in terms of the relative importance of jamming and adsoprtion-induced metastability.

  13. Globular Cluster Ages and Stromgren CCD Photometry

    E-Print Network [OSTI]

    Frank Grundahl

    1999-09-23T23:59:59.000Z

    Stromgren uvby CCD photometry can be used in a variety of ways to constrain the absolute and relative ages of globular clusters. The reddening corrected (v-y, c1) diagram offers the means to derive ages that are completely independent of distance. Very precise differential ages for clusters of the same chemical composition may also be determined from such 2-color plots, or from measurements of the magnitude difference, Delta_u, between the subgiant and horizontal branches on the $u-y, u$ plane (where both of these features are flat and well-defined, even for clusters like M13 that have extremely blue HBs on the (B-V, V) diagram). Based on high-quality photometry we find that: (1) M92 is 15 Gyr old, (2) M3 and M13 differ in age by < 1 Gyr, and (3) NGC 288, NGC 362, and NGC 1851 are coeval to within ~1.5 Gyr. These results strongly suggest that age cannot be the only ``second parameter''. Finally, we suggest that the observed variations in c1 among giant branch stars in all the metal-poor clusters that we have studied so far are likely due to star-to-star C and N abundance variations, and potentially indicate that most (if not all) globular clusters have ``primordial'' variations in at least these elements.

  14. adult age groups: Topics by E-print Network

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

    young (aged 18-35) adults and 10 older (aged 60-80) adults were tested. There was a... James, Vairi A. W. 2009-07-03 16 The Influence of Self-Perceptions of Aging on Older Adults'...

  15. Effects of Age on Meiosis in Budding Yeast

    E-Print Network [OSTI]

    Boselli, Monica

    In humans, the frequency with which meiotic chromosome mis-segregation occurs increases with age. Whether age-dependent meiotic defects occur in other organisms is unknown. Here, we examine the effects of replicative aging ...

  16. aging female sencar: Topics by E-print Network

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

    should increase with age after puberty. To test this, we examined age Pierce, Graham 57 Perception of Conspecific Female Pheromone Stimulates Female Calling in an Arctiid Moth,...

  17. age estimation: Topics by E-print Network

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

    face Wiskott, Laurenz 7 OPTIMUM ALWCATION FOR ESTIMATING AGE COMPOSITION USING AGE-LENGTH KEY Environmental Sciences and Ecology Websites Summary: OPTIMUM ALWCATION FOR...

  18. Diagnostic and Prognostic Analysis of Battery Performance & Aging...

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

    and Prognostic Analysis of Battery Performance & Aging based on Kinetic and Thermodynamic Principles Diagnostic and Prognostic Analysis of Battery Performance & Aging based on...

  19. american children ages: Topics by E-print Network

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

    july 2004 Age-Specific Demography in Plantago: Uncovering Roach,. Deborah 17 Tackling Dyslexia at an Early Age esearchers at HMS and Boston Children's Biology and Medicine Websites...

  20. THYROID HORMONE REVERSES AGING-INDUCED MYOCARDIAL FATTY ACID...

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

    occurs during aging in humans and mice and may contribute to development of heart failure. Aging also impairs myocardial fatty acid oxidation, causing increased...

  1. aging aircraft nondestructive: Topics by E-print Network

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

    at Early Ages An Experimental and Numerical Analysis by Dr for Nondestructive Testing of Cement-Based Materials at Early Ages - An Experi- mental and Numerical Analysis...

  2. aging tumor growth: Topics by E-print Network

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

    1983), provide valuable data on the age 85 AGE AND GROWTH OF SKIPJACK TUNA, KATSUWONUS PELAMIS, AND YELLOWFIN TUNA, THUNNUS ALBACARES, AS INDICATED Environmental Sciences and...

  3. age site south: Topics by E-print Network

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

    The Ohio Department of Aging, The Aging Network, The Ohio State University, The United States Department of Agriculture and County Commissioners Cooperating. Engineering Websites...

  4. Coronal Temperature as an Age Indicator

    E-Print Network [OSTI]

    Hwankyung Sung; M. S. Bessell; Hugues Sana

    2008-03-26T23:59:59.000Z

    The X-ray spectra of late type stars can generally be well fitted by a two temperature component model of the corona. We fnd that the temperature of both components are strong functions of stellar age, although the temperature of the hotter plasma in the corona shows a larger scatter and is probably affected by the activity of stars, such as flares. We confirm the power-law decay of the temperature of the hot plasma, but the temperature of the cool component decays linearly with log (age).

  5. Effect of non-ageing and ageing ceria nanoparticles suspensions on fresh water micro-algae

    E-Print Network [OSTI]

    Boyer, Edmond

    Effect of non-ageing and ageing ceria nanoparticles suspensions on fresh water micro-algae Manier nanoparticle (nCeO2) suspensions, towards freshwater micro-algae assessing the effect nCeO2 suspensions microscopy (TEM). In addition, the interaction between NPs and algae were investigated using flow

  6. The nearby eclipsing stellar system delta Velorum - I. Origin of the infrared excess from VISIR and NACO imaging

    E-Print Network [OSTI]

    Pierre Kervella; Frdric Thvenin; Monika Petr-Gotzens

    2008-11-11T23:59:59.000Z

    - Context: The triple stellar system delta Vel system presents a significant infrared excess, whose origin is still being debated. A large infrared bow shock has been discovered using Spitzer/MIPS observations. Although it appears as a significant contributor to the measured IR excess, the possibility exists that a circumstellar IR excess is present around the stars of the system. - Aims: The objective of the present VISIR and NACO observations is to identify whether one of the stars of the delta Vel system presents a circumstellar photometric excess in the thermal IR domain and to quantify it. - Methods: We observed delta Vel using the imaging modes of the ESO/VLT instruments VISIR (in BURST mode) and NACO to resolve the A-B system (0.6" separation) and obtain the photometry of each star. We also obtained one NACO photometry epoch precisely at the primary (annular) eclipse of delta Vel Aa by Ab. - Results: Our photometric measurements with NACO (2.17 mic), complemented by the existing visible photometry allowed us to reconstruct the spectral energy distribution of the three stars. We then compared the VISIR photometry (8.6-12.8 mic) to the expected photospheric emission from the three stars at the corresponding wavelengths. - Conclusions: We can exclude the presence of a circumstellar thermal infrared excess around delta Vel A or B down to a few percent level. This supports the conclusions of Gaspar et al. (2008) that the IR excess of delta Vel has an interstellar origin, although a cold circumstellar disk could still be present. In addition, we derive the spectral types of the three stars Aa, Ab, and B (respectively A2IV, A4V and F8V), and we estimate the age of the system around 400-500 Myr.

  7. FORUM REVIEW ARTICLE Alternative Perspectives on Aging

    E-Print Network [OSTI]

    Gems, David

    mechanisms at the heart of the aging process are a long-standing mystery. An influential theory has that limit lifespan (4, 5). We will first briefly outline the crisis in the oxidative damage theory, then de, the nematode Caenorhabditis elegans. The Oxidative Damage Theory in Crisis Many studies that have used C

  8. Characterizing mechanical effects of aging damage

    SciTech Connect (OSTI)

    Sewell, T.D.; Chen, S.P.; Schoonover, J.R.; Trent, B.C.; Howe, P.M.; Hjelm, R.P.; Browning, R.V.

    1998-12-01T23:59:59.000Z

    This is the final report of a two-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The goal was to develop and apply several different experimental and theoretical/computational tools to better understand physical and chemical aging phenomena in plastic-bonded high explosives, and to develop a methodology for predicting the likely effects of aging on the mechanical properties of the composite based on input from these fundamental studies. Initial comparisons were done for spectra of fresh and aged Esane, as well as PBX-9501, and the authors found differences in the carbonyl region of the spectrum, which possibly reflect differences in hydrogen bonding due to aging phenomena. The micromechanical model of composites was extended to study various volume fractions of HMX with binders. The results showed that, as the binder fraction increases, there is a decrease in the maximum stress that can be supported but an increase in the percent strain at final fracture. A more realistic microstructural model was obtained through the use of a phase field model. Using this model, the authors have studied the microstructural evolution as a function of the grain boundary energy vs. misorientation relationship. The initial results indicate that there are some changes in the grain growth rate when the grain-boundary energy dependence on the angle is not constant. They also find that solute tends to segregate at the grain boundary and slows the grain growth kinetics.

  9. Bitcoin and the Age of Bespoke Silicon

    E-Print Network [OSTI]

    Wang, Deli

    Bitcoin and the Age of Bespoke Silicon Michael B. Taylor Associate Professor University of California, San Diego #12;This Talk Introduction An Overview of the Bitcoin Cryptocurrency Bitcoin's Computing Evolution Bespoke Silicon #12;Interesting Facts about Bitcoin The most successful digital

  10. Thermal aging of nitroplasticized Estane 5703

    SciTech Connect (OSTI)

    Orler, E. B. (E. Bruce); Wrobleski, Debra A.; Cooke, D. W. (D. Wayne); Bennett, B. L. (Bryan L.); Smith, M. E. (Mark E.); Jahan, M. S. (M. Shan)

    2002-01-01T23:59:59.000Z

    In support of the Lifetime Prediction modeling effort, we have been investigating the aging processes that could impact the lifetime of PBX 9501. PBX 9501 is composed of 95% HMX and 5% polymeric binder. The polymeric binder is composed of 50% nitroplasticizer (NP) and 50% Estane{reg_sign} 5703 with a small quantity of stabilizer. Estane{reg_sign} 5703 is a segmented poly(ester urethane) with mechanical properties derived from phase separation of hard and soft segments along the polymer backbone. Since the binder has a significant effect on the composite mechanical properties, it is essential to know how the binder changes with time. Typically, polymer lifetime predictions are determined from extrapolation of properties after the material has been exposed to elevated temperatures and/or reactive environments for varying periods of time. For multiphase polymers, this accelerated aging methodology is very difficult to interpret since elevated temperatures alter the physical structure of the polymer, as well as, accelerate the chemical degradation reactions. Accelerated aging studies of nitroplasticized Estane have shown an increase in the molecular weight. The increase in molecular weight is most likely due to polymer chain branching reactions that eventually leads to formation an insoluble cross-linked gel. The decreased chain mobility caused by branching may also affect phase separation, which in turn, may change the mechanical properties. In this paper we report results of thermal aging studies on the properties, morphology and chemistry of nitroplasticized Estane.

  11. Eligibility: Cancer Survivor ages 35-75

    E-Print Network [OSTI]

    Walter, Peter

    Eligibility: · Cancer Survivor ages 35-75 · Patient has completed treatment within last two years for non-metastic solid tumor · Patient's cancer is currently considered stable or in remission · At least. Please contact Missy Buchanan 415-353-7019 for more information. Helen Diller Family Comprehensive Cancer

  12. Aging and Place: Building Health Promotion into

    E-Print Network [OSTI]

    Illinois at Chicago, University of

    Aging and Place: Building Health Promotion into Long-Term Care IHRP Brownbag May 21, 2013 Naoko-being in social contexts. To improve quality of services by building health promotion into long-term care. #12 U.S. 3. Building health promotion into long-term care Why important? Challenges

  13. Utah Commission on Aging June 16, 2009

    E-Print Network [OSTI]

    Tipple, Brett

    is focusing on fall prevention, end of life care, and elder abuse issues, all of which fall under the auspices Cherie Brunker Health Care Shauna O'Neil Area Agencies on Aging Robert Archuleta Ethnic Minorities Helen-Michele Church Department of Human Services Kent Alderman Legal Profession Gary Kelso Long-Term Care Jo

  14. Age-Related Changes in Vestibular Evoked Myogenic Potentials and Dynamic Visual Acuity at Near and Far Distances

    E-Print Network [OSTI]

    Tourtillott, Brandon Michael

    2009-09-03T23:59:59.000Z

    Morphological changes in the vestibular system associated with aging are well documented, but the ability to measure these changes clinically has been limited. Two such tests that have been useful for this purpose are ...

  15. COMPONENT DEGRADATION SUSCEPTIBILITIES AS THE BASES FOR MODELING REACTOR AGING RISK

    SciTech Connect (OSTI)

    Unwin, Stephen D.; Lowry, Peter P.; Toyooka, Michael Y.

    2010-07-18T23:59:59.000Z

    The extension of nuclear power plant operating licenses beyond 60 years in the United States will be necessary if we are to meet national energy needs while addressing the issues of carbon and climate. Characterizing the operating risks associated with aging reactors is problematic because the principal tool for risk-informed decision-making, Probabilistic Risk Assessment (PRA), is not ideally-suited to addressing aging systems. The components most likely to drive risk in an aging reactor - the passives - receive limited treatment in PRA, and furthermore, standard PRA methods are based on the assumption of stationary failure rates: a condition unlikely to be met in an aging system. A critical barrier to modeling passives aging on the wide scale required for a PRA is that there is seldom sufficient field data to populate parametric failure models, and nor is there the availability of practical physics models to predict out-year component reliability. The methodology described here circumvents some of these data and modeling needs by using materials degradation metrics, integrated with conventional PRA models, to produce risk importance measures for specific aging mechanisms and component types. We suggest that these measures have multiple applications, from the risk-screening of components to the prioritization of materials research.

  16. The 2006 Harvard / Paul F. Glenn Symposium on Aging

    E-Print Network [OSTI]

    Church, George M.

    diseases of aging, such as diabetes, cancer, Alzheimer's and heart disease. A recent study1 concluded

  17. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Age at first visit

    E-Print Network [OSTI]

    Kay, Mark A.

    Information System / Decision Support System Health Policy Facts POLICY IMPLICATIONS Approaches to CCS reform for age, diagnostic category, and diagnostic complexity -- is needed to make health care delivery more in different age groups use health care differently. Children in their first year of life primarily use

  18. AGES: THE AGN AND GALAXY EVOLUTION SURVEY

    SciTech Connect (OSTI)

    Kochanek, C. S. [Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210 (United States); Eisenstein, D. J.; Caldwell, N.; Jones, C.; Murray, S. S.; Forman, W. R.; Green, P. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Cool, R. J. [Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544 (United States); Assef, R. J.; Eisenhardt, P.; Stern, D. [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States); Jannuzi, B. T.; Dey, A. [NOAO, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Brown, M. J. I. [School of Physics, Monash University, Clayton, Victoria 3800 (Australia); Gonzalez, A. H. [Department of Astronomy, Bryant Space Science Center, University of Florida, Gainesville, FL 32611 (United States)

    2012-05-01T23:59:59.000Z

    The AGN and Galaxy Evolution Survey (AGES) is a redshift survey covering, in its standard fields, 7.7 deg{sup 2} of the Booetes field of the NOAO Deep Wide-Field Survey. The final sample consists of 23,745 redshifts. There are well-defined galaxy samples in 10 bands (the B{sub W} , R, I, J, K, IRAC 3.6, 4.5, 5.8, and 8.0 {mu}m, and MIPS 24 {mu}m bands) to a limiting magnitude of I < 20 mag for spectroscopy. For these galaxies, we obtained 18,163 redshifts from a sample of 35,200 galaxies, where random sparse sampling was used to define statistically complete sub-samples in all 10 photometric bands. The median galaxy redshift is 0.31, and 90% of the redshifts are in the range 0.085 < z < 0.66. Active galactic nuclei (AGNs) were selected as radio, X-ray, IRAC mid-IR, and MIPS 24 {mu}m sources to fainter limiting magnitudes (I < 22.5 mag for point sources). Redshifts were obtained for 4764 quasars and galaxies with AGN signatures, with 2926, 1718, 605, 119, and 13 above redshifts of 0.5, 1, 2, 3, and 4, respectively. We detail all the AGES selection procedures and present the complete spectroscopic redshift catalogs and spectral energy distribution decompositions. Photometric redshift estimates are provided for all sources in the AGES samples.

  19. Age-dependent decay in the landscape

    SciTech Connect (OSTI)

    Winitzki, Sergei [Department of Physics, University of Heidelberg (Germany)

    2008-03-15T23:59:59.000Z

    The picture of the 'multiverse' arising in diverse cosmological scenarios involves transitions between metastable vacuum states. It was pointed out by Krauss and Dent that the transition rates decrease at very late times, leading to a dependence of the transition probability between vacua on the age of each vacuum region. I investigate the implications of this non-Markovian, age-dependent decay on the global structure of the spacetime in landscape scenarios. I show that the fractal dimension of the eternally inflating domain is precisely equal to 3, instead of being slightly below 3, which is the case in scenarios with purely Markovian, age-independent decay. I develop a complete description of a non-Markovian landscape in terms of a nonlocal master equation. Using this description I demonstrate by an explicit calculation that, under some technical assumptions about the landscape, the probabilistic predictions of our position in the landscape are essentially unchanged, regardless of the measure used to extract these predictions. I briefly discuss the physical plausibility of realizing non-Markovian vacuum decay in cosmology in view of the possible decoherence of the metastable quantum state.

  20. Activities at the FAA aging aircraft NDI validation center

    SciTech Connect (OSTI)

    Shurtleff, W.

    1994-08-01T23:59:59.000Z

    Aging Aircraft NDI Validation Center (AANC) was established by the FAA Technical Center (FAATC) at Sandia National Laboratories in August of 1991. The Validation Center supports the inspection portion of the FAA`s National Aging Aircraft Program which was mandated by Congress in the 1988 Aviation Safety Act. The ultimate customers of the AANC include the FAA, airframe and engine manufacturers, airlines, and third party maintenance facilities. One goal of the AANC is to provide independent validation of technologies intended to enhance the structural inspection of aging commuter and transport aircraft. Another goal is to assist in transferring emerging inspection technology from other parts of the FAA`s program to the aircraft industry. The deliverables from both these activities are an assessment of the reliability and cost benefits of an inspection technology as applied to a particular inspection or class of inspections. The validation process consists of a quantitative and systematic assessment of the reliability and cost/benefits on a Nondestructive Inspection (NDI) process. A NDI process is defined as the NDI systems and procedures used for inspections. This includes the NDI operator, inspection environment, and the object being inspected. The phases of the validation process are: 1. Conceptual, 2. Preliminary design, 3. Final design, and 4. Field implementation. The AAANC usually gets involved in the validation process during Phases 2 and 3. The Center supports field trials with a full array of test specimens and established procedures for conducting the trials. Phase 4 reliability includes field trials using independent inspectors either at the Center`s hangar or at outside maintenance facilities. Three activities are summarized below where inspection technology has been validated in the field. These are: (1) eddy current inspection reliability experiment; (2) magneto optic imager validation; and (3) inspection tool improvement.

  1. Collaborative systems thinking : an exploration of the mechanisms enabling team systems thinking

    E-Print Network [OSTI]

    Lamb, Caroline Marie

    2009-01-01T23:59:59.000Z

    Aerospace systems are among the most complex anthropogenic systems and require large quantities of systems knowledge to design successfully. Within the aerospace industry, an aging workforce places those with the most ...

  2. Dynamic particle tracking reveals the ageing temperature of a colloidal glass

    E-Print Network [OSTI]

    Loss, Daniel

    LETTERS Dynamic particle tracking reveals the ageing temperature of a colloidal glass PING WANG.1038/nphys366 T he glass transition1 is considered to be one of the most fundamental problems in statistical for the large variety of glass systems is lacking2,3 --partly because of difficulties encountered

  3. maintenance. This research is relevant to opera-tions and maintenance challenges facing aging

    E-Print Network [OSTI]

    the need for preventive maintenance or other diagnostic activities on the physical system. Simulationsmaintenance. This research is relevant to opera- tions and maintenance challenges facing aging-benefit of extending the time between overhauls. reducing the probability of a failure in the field. and preventive

  4. Working for a healthier tomorrow: a Review of the health of Britain's working age population

    E-Print Network [OSTI]

    Mumby, Peter J.

    of her clinical work sprang a research interest in Systemic Sclerosis, a disorder for which little couldWorking for a healthier tomorrow: a Review of the health of Britain's working age population University followed by a diploma in medical social work. She entered medical school as a mature student

  5. On the seismic age of the Sun

    E-Print Network [OSTI]

    G. Houdek; D. O. Gough

    2007-10-03T23:59:59.000Z

    We use low-degree acoustic modes obtained by the BiSON to estimate the main-sequence age $t_\\odot$ of the Sun. The calibration is accomplished by linearizing the deviations from a standard solar model the seismic frequencies of which are close to those of the Sun. Formally, we obtain the preliminary value $t_\\odot=4.68\\pm0.02 $Gy, coupled with an initial heavy-element abundance $Z=0.0169\\pm0.0005$. The quoted standard errors, which are not independent, are upper bounds implied under the assumption that the standard errors in the observed frequencies are independent.

  6. Asian Age Enterprise Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof EnergyInnovation in Carbon Capture andsoftwareAsian Age Enterprise Ltd Place:

  7. Age Dating of Mixed SNM--Preliminary Investigations

    SciTech Connect (OSTI)

    Yuan, D., Guss, P. P., Yfantis, E., Klingensmith, A., Emer, D.

    2011-12-01T23:59:59.000Z

    Recently we investigated the nuclear forensics problem of age determination for mixed special nuclear material (SNM). Through limited computational mixing experiments and interactive age analysis, it was observed that age dating results are generally affected by the mixing of samples with different assays or even by small radioactive material contamination. The mixing and contamination can be detected through interactive age analysis, a function provided by the Decay Interaction, Visualization and Analysis (DIVA) software developed by NSTec. It is observed that for mixed SNM with two components, the age estimators typically fall into two distinct clusters on the time axis. This suggests that averaging or other simple statistical methods may not always be suitable for age dating SNM mixtures. Instead, an interactive age analysis would be more suitable for age determination of material components of such SNM mixtures. This work was supported by the National Center for Nuclear Security (NCNS).

  8. aged primary coolant: Topics by E-print Network

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

    problem.(1,2 with a variety of functions that often span the different hypotheses of aging.(2) It is unsurprising senescence, is a primary mechanism of organismal aging.(9-13)...

  9. Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded II Asphalt Pavements Effect of Aging Simulations Concluding Remarks #12;3 Objectives Develop) Correspondence Principle based formulation Application: Asphalt concrete pavements (Part II) #12;4 Asphalt

  10. Exercise training modulates apoptotic signaling in the aging rat heart

    E-Print Network [OSTI]

    Kwak, Hyo Bum

    2005-11-01T23:59:59.000Z

    Aging is characterized by a progressive decline in cardiac function. A critical contributor to the age-related impairment in heart function is the loss of cardiac myocytes through ??apoptosis??, or programmed cell death. A dramatic increase...

  11. Simple Systems: A Holistic, Postmodern Alternative to the Oppressive and Outdated Study of Complex Systems

    E-Print Network [OSTI]

    Lahiri, Mayank

    Systems Semiotics, Transformative Hermeneutics, and Applications Mayank Lahiri University of Illinois of our axiomatic, organic, oak-barrel aged framework, thereby reducing its intrinsic hermeneutics

  12. Microstructural Features in Aged Erbium Tritide Foils

    SciTech Connect (OSTI)

    Gelles, David S.; Brewer, L. N.; Kotula, Paul G.; Cowgill, Donald F.; Busick, C. C.; Snow, C. S.

    2008-01-01T23:59:59.000Z

    Aged erbium tritide foil specimens are found to contain five distinctly different microstructural features. The general structure was of large columnar grains of ErT2. But on a fine scale, precipitates believed to be erbium oxy-tritides and helium bubbles could be identified. The precipitate size was in the range of ~10 nm and the bubbles were of an unusual planar shape on {111} planes with an invariant thickness of ~1 nm and a diameter on the order of 10 nm. Also, an outer layer containing no fine precipitate structure and only a few helium bubbles was present on foils. This layer is best described as a denuded zone which probably grew during aging in air. Finally, large embedded Er2O3 particles were found at low density and non-uniformly distributed, but sometimes extending through the thickness of the foil. A failure mechanism allowing the helium to escape is suggested by observed cracking between bubbles closer to end of life.

  13. Monazite Th-Pb age depth profiling

    SciTech Connect (OSTI)

    Grove, M.; Harrison, T.M. [Univ. of California, Los Angeles, CA (United States)] [Univ. of California, Los Angeles, CA (United States)

    1999-06-01T23:59:59.000Z

    The significant capabilities of the ion microprobe for thermochronometric investigations of geologic materials remain largely unexploited. Whereas {sup 208}Pb/{sup 232}Th spot analysis allows {approximately} 10-mm-scale imaging of Pb loss profiles or overgrowths in sectioned monazite grains, the spatial resolution offered by depth profiling into the surface region of natural crystals is more than two orders of magnitude higher. The authors document here the ability of the high-resolution ion microprobe to detect {sup 208}Pb/{sup 232}Th age differences of < 1 m.y. with better than 0.05 {micro}m depth resolution in the outer micron of Tertiary monazites from the hanging wall of the Himalayan Main Central thrust. Age gradients on this scale are inaccessible to ion microprobe spot analysis or conventional thermal ionization mass spectrometry. Interpretation of the near-surface {sup 208}Pb distributions with available monazite Pb diffusion data illustrates the potential of the approach for recovering continuous, high-temperature thermal history information not previously available.

  14. The 2008 Harvard / Paul F. Glenn Symposium on Aging

    E-Print Network [OSTI]

    Church, George M.

    of aging such as diabetes, cancer, Alzheimer's and heart disease. Thus, a major goal in the coming years

  15. The 2007 Harvard / Paul F. Glenn Symposium on Aging

    E-Print Network [OSTI]

    Church, George M.

    are regulated, leading to novel medicines to forestall and treat diseases of aging such as diabetes, cancer

  16. The 2009 Harvard / Paul F. Glenn Symposium on Aging

    E-Print Network [OSTI]

    Church, George M.

    of aging such as diabetes, cancer, Alzheimer's and heart disease. Thus, a major goal in the coming years

  17. Characterization of thermal aging of duplex stainless steel by SQUID

    SciTech Connect (OSTI)

    Isobe, Y.; Kamimura, A.; Aoki, K.; Nakayasu, F. [Nuclear Fuel Industries, Ltd., Osaka (Japan)

    1995-08-01T23:59:59.000Z

    Thermal aging is a growing concern for long-term-aged duplex stainless steel piping in nuclear power plants. Superconducting QUantum Interference Device (SQUID) was used for the detection of thermal aging of SUS329 rolled duplex stainless steel and SCS16 cast duplex stainless steel. It was found that the SQUID output signal pattern in the presence of AC magnetic field applied to the specimen was sensitive to the changes in electromagnetic properties due to thermal aging.

  18. aged wild-type littermates: Topics by E-print Network

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

    98504-3144 An age-length key (ALK) is the tra- ditional method for estimating age-stage length samples for relatively costly age determination (age subsamplel. Age...

  19. aged 6-12 diagnosed: Topics by E-print Network

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

    98504-3144 An age-length key (ALK) is the tra- ditional method for estimating age-stage length samples for relatively costly age determination (age subsamplel. Age...

  20. A New Theory of Cosmology That Preserves the Generally Recognized Symmetries of Cosmos, Explains the Origin of the Energy for Matter Field, but Excludes the Existence of the Big Bang

    E-Print Network [OSTI]

    Fang-Pei Chen

    2006-05-12T23:59:59.000Z

    While the generally recognized symmetries of cosmos are preserved, conservation laws for gravitational system are reconsidered and the Lagrangian density of pure gravitational field is revised. From these considerations, some of the theoretical foundations of the current cosmology are extended or revised, and a new theory of cosmology is established. This new theory leads to the following distinct properties of cosmos: the energy of matter field might originate from the gravitational field; the big bang might not have occurred; the fields of the dark energy and some parts of the dark matter would not be matter fields but might be gravitational fields, they would only interact with gravitational force but could not interact with other forces. These distinct properties can be tested by future experiments and observations.

  1. FUNCTIONAL ESTIMATION FOR A MULTICOMPONENT AGE REPLACEMENT MODEL

    E-Print Network [OSTI]

    L'Ecuyer, Pierre

    1 FUNCTIONAL ESTIMATION FOR A MULTICOMPONENT AGE REPLACEMENT MODEL Pierre L'Ecuyer, Benoit Martin, controlled by a replacement rule based on age thresholds. We show how to estimate the expected cost­ generative simulation, maintenance models, age replacement policies. #12; 2 L'ECUYER, MARTIN, AND V ' AZQUEZ

  2. FUNCTIONAL ESTIMATION FOR A MULTICOMPONENT AGE REPLACEMENT MODEL

    E-Print Network [OSTI]

    Vázquez-Abad, Felisa J.

    FUNCTIONAL ESTIMATION FOR A MULTICOMPONENT AGE REPLACEMENT MODEL Pierre L'Ecuyer, Benoit Martin, controlled by a replacement rule based on age thresholds. We show how to estimate the expected cost­ generative simulation, maintenance models, age replacement policies. #12; L'ECUYER, MARTIN, AND V ' AZQUEZ

  3. Dynamical Systems, Vol. 21, No. 2, June 2006, 231233 Negative zooplankton do not exist--a response to

    E-Print Network [OSTI]

    Edwards, Andrew

    Systems (data from ISI Web of Science as of 14 July 2005, and excludes self-citations by authors). EB96 the surface water and deep water causes the nutrients to equilibrate to the deep-water concentration N0 rate between the surface and deep layers, and (termed 2 by Halanay [5]) is a combination

  4. NRC Research Program on Plant Aging: Listing and summaries of reports issued through September 1993. Revision 4

    SciTech Connect (OSTI)

    Vora, J.P.

    1993-12-01T23:59:59.000Z

    The US Nuclear Regulatory Commission is conducting the Nuclear Plant Aging Research (NPAR) Program. This is a comprehensive hardware-oriented engineering research program focused on understanding the aging mechanisms of components and systems in nuclear power plants. The NPAR program also focuses on methods for simulating and monitoring the aging-related degradation of these components and systems. In addition, it provides recommendations for effective maintenance to manage aging and for implementation of the research results in the regulatory process. This document contains a listing and index of reports generated in the NPAR Program that were issued through September 1993 and summaries of those reports. Each summary describes the elements of the research covered in the report and outlines the significant results. For the convenience of the user, the reports are indexed by personal author, corporate author, and subject.

  5. Ageing of Natural Rubber under Stress

    E-Print Network [OSTI]

    S. M. Clarke; F. Elias; E. M. Terentjev

    2000-05-04T23:59:59.000Z

    We report a dynamical-mechanical study of stress relaxation at small deformation in a natural (polyisoprene) rubber well above its glass transition temperature Tg. We find that an almost complete relaxation of stress takes place over very long periods of time, even though the elastic network integrity is fully retained. The relaxation rate and the long-time equilibrium modulus are sensitive functions of temperature which do not follow time-temperature superposition. Many characteristic features of non-ergodic ageing response are apparent at both short and very long times. We interpret the observed behaviour in terms of the properties of rubber crosslinks, capable of isomerisation under stress, and relate the results to recent models of soft glassy rheology.

  6. Dark Energy in the Dark Ages

    E-Print Network [OSTI]

    Eric V. Linder

    2006-04-11T23:59:59.000Z

    Non-negligible dark energy density at high redshifts would indicate dark energy physics distinct from a cosmological constant or ``reasonable'' canonical scalar fields. Such dark energy can be constrained tightly through investigation of the growth of structure, with limits of \\la2% of total energy density at z\\gg1 for many models. Intermediate dark energy can have effects distinct from its energy density; the dark ages acceleration can be constrained to last less than 5% of a Hubble e-fold time, exacerbating the coincidence problem. Both the total linear growth, or equivalently \\sigma_8, and the shape and evolution of the nonlinear mass power spectrum for zenergy behavior over the entire range z=0-1100.

  7. Emerging nondestructive inspection methods for aging aircraft

    SciTech Connect (OSTI)

    Beattie, A; Dahlke, L; Gieske, J [and others

    1994-01-01T23:59:59.000Z

    This report identifies and describes emerging nondestructive inspection (NDI) methods that can potentially be used to inspect commercial transport and commuter aircraft for structural damage. The nine categories of emerging NDI techniques are: acoustic emission, x-ray computed tomography, backscatter radiation, reverse geometry x-ray, advanced electromagnetics, including magnetooptic imaging and advanced eddy current techniques, coherent optics, advanced ultrasonics, advanced visual, and infrared thermography. The physical principles, generalized performance characteristics, and typical applications associated with each method are described. In addition, aircraft inspection applications are discussed along with the associated technical considerations. Finally, the status of each technique is presented, with a discussion on when it may be available for use in actual aircraft maintenance programs. It should be noted that this is a companion document to DOT/FAA/CT-91/5, Current Nondestructive Inspection Methods for Aging Aircraft.

  8. Aging management guideline for commercial nuclear power plants - heat exchangers

    SciTech Connect (OSTI)

    Booker, S.; Lehnert, D.; Daavettila, N.; Palop, E.

    1994-06-01T23:59:59.000Z

    This Aging Management Guideline (AMG) describes recommended methods for effective detection and mitigation of age-related degradation mechanisms in commercial nuclear power plant heat exchangers important to license renewal. The intent of this AMG is to assist plant maintenance and operations personnel in maximizing the safe, useful life of these components. It also supports the documentation of effective aging management programs required under the License Renewal Rule 10 CFR 54. This AMG is presented in a manner that allows personnel responsible for performance analysis and maintenance to compare their plant-specific aging mechanisms (expected or already experienced) and aging management program activities to the more generic results and recommendations presented herein.

  9. Age discrimination protection is not limited to seniors

    SciTech Connect (OSTI)

    Ossi, G.J. [Vennable, LLP (United States)

    2005-12-15T23:59:59.000Z

    The average age of a coal miner in the USA today is over 50. The Age Discrimination in Employment Act of 1967 (ADEA) protects individuals over 40 years of age from employment discrimination based on age. Under ADEA it is unlawful to discriminate based on an employee's age when hiring, firing, promoting, demoting, laying-off, compensating, assigning or training an employee. The author advocates that, although ADEA can be complicated, the best rule is simply to treat older workers the same as younger workers. Advice is given on considering waivers of ADEA claims.

  10. Material compatibility and thermal aging of thermoelectric materials.

    SciTech Connect (OSTI)

    Gardea, Andrew D.; Nishimoto, Ryan; Yang, Nancy Y. C.; Morales, Alfredo Martin; Whalen, Scott A.; Chames, Jeffrey M.; Clift, W. Miles

    2009-09-01T23:59:59.000Z

    In order to design a thermoelectric (TE) module suitable for long-term elevated temperature use, the Department 8651 has conducted parametric experiments to study material compatibility and thermal aging of TE materials. In addition, a comprehensive material characterization has been preformed to examine thermal stability of P- and N-based alloys and their interaction with interconnect diffusion barrier(s) and solder. At present, we have completed the 7-days aging experiments for 36 tiles, from ambient to 250 C. The thermal behavior of P- and N-based alloys and their thermal interaction with both Ni and Co diffusion barriers and Au-Sn solder were examined. The preliminary results show the microstructure, texture, alloy composition, and hardness of P-(Bi,Sb){sub 2}Te{sub 3} and N-Bi{sub 2}(Te,Se){sub 3} alloys are thermally stable up to 7 days annealing at 250 C. However, metallurgical reactions between the Ni-phosphor barriers and P-type base alloy were evident at temperatures {ge} 175 C. At 250 C, the depth (or distance) of the metallurgical reaction and/or Ni diffusion into P-(Bi,Sb){sub 2}Te{sub 3} is approximately 10-15 {micro}m. This thermal instability makes the Ni-phosphor barrier unsuitable for use at temperatures {ge} 175 C. The Co barrier appeared to be thermally stable and compatible with P(Bi,Sb){sub 2}Te{sub 3} at all annealing temperatures, with the exception of a minor Co diffusion into Au-Sn solder at {ge} 175 C. The effects of Co diffusion on long-term system reliability and/or the thermal stability of the Co barrier are yet to be determined. Te evaporation and its subsequent reaction with Au-Sn solder and Ni and Co barriers on the ends of the tiles at temperatures {ge} 175 C were evident. The Te loss and its effect on the long-term required stoichiometry of P-(Bi, Sb){sub 2}Te{sub 3} are yet to be understood. The aging experiments of 90 days and 180 days are ongoing and scheduled to be completed in 30 days and 150 days, respectively. Material characterization activities are continuing for the remaining tiles.

  11. NO2 Aging and Iodine Loading of Silver-Functionalized Aerogels

    SciTech Connect (OSTI)

    Patton, K K [ORNL; Bruffey, S H [ORNL; Walker, J F [ORNL; Jubin, R T [ORNL

    2014-07-31T23:59:59.000Z

    Off-gas treatment systems in used fuel reprocessing which use fixed-bed adsorbers are typically designed to operate for an extended period of time before replacement or regeneration of the adsorbent. During this time, the sorbent material will be exposed to the off-gas stream. Exposure could last for months, depending on the replacement cycle time. The gas stream will be at elevated temperature and will possibly contain a mixture of water vapor, NOx, nitric acid vapors, and a variety of other constituents in addition to the radionuclides of capture interest. A series of studies were undertaken to evaluate the effects of long-term exposure, or aging, on proposed iodine sorbent materials under increasingly harsh off-gas conditions. Previous studies have evaluated the effects of up to 6 months of aging under dry air and under humid air conditions on the iodine loading behavior of Ag0-functionalized aerogels. This study examines the effects of extended exposure (up to 6 months) to NO2 on the iodine loading capacity of Ag0- functionalized aerogels. Material aged for 1 and 2 months appeared to have a similar total loading capacity to fresh material. Over an aging period of 4 months, a loss of approximately 15% of the total iodine capacity was seen. The iodine capacity loss on silver-functionalized aerogels due to NO2 was smaller than the iodine capacity loss due to humid or dry air aging.

  12. Unitary scintillation detector and system

    DOE Patents [OSTI]

    McElhaney, S.A.; Chiles, M.M.

    1994-05-31T23:59:59.000Z

    The invention is a unitary alpha, beta, and gamma scintillation detector and system for sensing the presence of alpha, beta, and gamma radiations selectively or simultaneously. The scintillators are mounted in a light-tight housing provided with an entrance window for admitting alpha, beta, and gamma radiation and excluding ambient light from the housing. Light pulses from each scintillator have different decay constants that are converted by a photosensitive device into corresponding differently shaped electrical pulses. A pulse discrimination system identifies the electrical pulses by their respective pulse shapes which are determined by decay time. The identified electrical pulses are counted in separate channel analyzers to indicate the respective levels of sensed alpha, beta, and gamma radiations. 10 figs.

  13. Unitary scintillation detector and system

    DOE Patents [OSTI]

    McElhaney, Stephanie A. (Oak Ridge, TN); Chiles, Marion M. (Knoxville, TN)

    1994-01-01T23:59:59.000Z

    The invention is a unitary alpha, beta, and gamma scintillation detector and system for sensing the presence of alpha, beta, and gamma radiations selectively or simultaneously. The scintillators are mounted in a light-tight housing provided with an entrance window for admitting alpha, beta, and gamma radiation and excluding ambient light from the housing. Light pulses from each scintillator have different decay constants that are converted by a photosensitive device into corresponding differently shaped electrical pulses. A pulse discrimination system identifies the electrical pulses by their respective pulse shapes which are determined by decay time. The identified electrical pulses are counted in separate channel analyzers to indicate the respective levels of sensed alpha, beta, and gamma radiations.

  14. Rehabilitating A Thermal Storage System Through Commissioning

    E-Print Network [OSTI]

    Liu, M.; Veteto, B.; Claridge, D. E.

    1998-01-01T23:59:59.000Z

    systems. The design air flow rate is 40,300 cfm (1.67 cfin/ft2) with 8,800 cfin (0.37 cfin/ft2) outside air. The installed coil capacity is 130 tons for the 13 AHUs excluding the FCUs. The summary of design air-handler information is listed in Table... handlers has direct return. The FCUs in the patient rooms have three-way valves while the roof top units have two-way valves. Table 1: Summary of Design Characteristics of the AHtJs * Outside air unit for the patient rooms. Figure 2a presents a...

  15. Final report on development of Pulse Arrested Spark Discharge (PASD) for aging aircraft wiring application.

    SciTech Connect (OSTI)

    Lockner, Thomas Ramsbeck; Howard, R. Kevin; Pea, Gary Edward; Schneider, Larry X.; Higgins, Matthew B.; Glover, Steven Frank

    2006-09-01T23:59:59.000Z

    Pulsed Arrested Spark Discharge (PASD) is a Sandia National Laboratories Patented, non-destructive wiring system diagnostic that has been developed to detect defects in aging wiring systems in the commercial aircraft fleet. PASD was previously demonstrated on relatively controlled geometry wiring such as coaxial cables and shielded twisted-pair wiring through a contract with the U.S. navy and is discussed in a Sandia National Laboratories report, SAND2001-3225 ''Pulsed Arrested Spark Discharge (PASD) Diagnostic Technique for the Location of Defects in Aging Wiring Systems''. This report describes an expansion of earlier work by applying the PASD technique to unshielded twisted-pair and discrete wire configurations commonly found in commercial aircraft. This wiring is characterized by higher impedances as well as relatively non-uniform impedance profiles that have been found to be challenging for existing aircraft wiring diagnostics. Under a three year contract let by the Federal Aviation Administration, Interagency Agreement DTFA-03-00X90019, this technology was further developed for application on aging commercial aircraft wiring systems. This report describes results of the FAA program with discussion of previous work conducted under U.S. Department of Defense funding.

  16. Aging and weathering of cool roofing membranes

    SciTech Connect (OSTI)

    Akbari, Hashem; Berhe, Asmeret A.; Levinson, Ronnen; Graveline,Stanley; Foley, Kevin; Delgado, Ana H.; Paroli, Ralph M.

    2005-08-23T23:59:59.000Z

    Aging and weathering can reduce the solar reflectance of cool roofing materials. This paper summarizes laboratory measurements of the solar spectral reflectance of unweathered, weathered, and cleaned samples collected from single-ply roofing membranes at various sites across the United States. Fifteen samples were examined in each of the following six conditions: unweathered; weathered; weathered and brushed; weathered, brushed and then rinsed with water; weathered, brushed, rinsed with water, and then washed with soap and water; and weathered, brushed, rinsed with water, washed with soap and water, and then washed with an algaecide. Another 25 samples from 25 roofs across the United States and Canada were measured in their unweathered state, weathered, and weathered and wiped. We document reduction in reflectivity resulted from various soiling mechanisms and provide data on the effectiveness of various cleaning approaches. Results indicate that although the majority of samples after being washed with detergent could be brought to within 90% of their unweathered reflectivity, in some instances an algaecide was required to restore this level of reflectivity.

  17. Chelation: A Fundamental Mechanism of Action of AGE Inhibitors, AGE Breakers, and Other Inhibitors of Diabetes Complications

    SciTech Connect (OSTI)

    Nagai, Rhoji; Murray, David B.; Metz, Thomas O.; Baynes, John

    2012-03-01T23:59:59.000Z

    Advanced glycation or glycoxidation end-products (AGE) increase in tissue proteins with age, and their rate of accumulation is increased in diabetes, nephropathy and inflammatory diseases. AGE inhibitors include a range of compounds that are proposed to act by trapping carbonyl and dicarbonyl intermediates in AGE formation. However, some among the newer generation of AGE inhibitors lack reactive functional groups that would trap reaction intermediates, indicating an alternative mechanism of action. We propose that AGE inhibitors function primarily as chelators, inhibiting metal-catalyzed oxidation reactions. The AGE-inhibitory activity of angiotensin-converting enzyme inhibitors and angiotensin receptor blockers is also consistent with their chelating activity. Finally, compounds described as AGE breakers, or their hydrolysis products, also have strong chelating activity, suggesting that these compounds also act through their chelating activity. We conclude that chelation is the common, and perhaps the primary, mechanism of action of AGE inhibitors and breakers, and that chronic, mild chelation therapy should prove useful in treatment of diabetes and age-related diseases characterized by oxidative stress, inflammation and increased chemical modification of tissue proteins by advanced glycoxidation and lipoxidation end-products.

  18. The (safety-related) heat exchangers aging management guideline for commercial nuclear power plants, and developments since 1994

    SciTech Connect (OSTI)

    Clauss, J.M.

    1998-08-01T23:59:59.000Z

    The US Department of Energy (DOE), in cooperation with the Electric Power Research Institute (EPRI) and US nuclear power plant utilities, is preparing a series of aging management guidelines (AMGs) for commodity types of components (e.g., heat exchangers, electrical cable and terminations, pumps). Commodities are included in this series based on their importance to continued nuclear plant operation and license renewal. The AMGs contain a detailed summary of operating history, stressors, aging mechanisms, and various types of maintenance and surveillance practices that can be combined to create an effective aging management program. Each AMG is intended for use by the systems engineers and plant maintenance staff (i.e., an AMG is intended to be a hands-on technical document rather than a licensing document). The heat exchangers AMG, published in June 1994, includes the following information of interest to nondestructive examination (NDE) personnel: aging mechanisms determined to be non-significant for all applications; aging mechanisms determined to be significant for some applications; effective conventional programs for managing aging; and effective unconventional programs for managing aging. Since the AMG on heat exchangers was published four years ago, a brief review has been conducted to identify emerging regulatory issues, if any. The results of this review and lessons learned from the collective set of AMGs are presented.

  19. National Institute on Aging HIV, AIDS, and

    E-Print Network [OSTI]

    Levin, Judith G.

    -term memory loss. You can now also test your blood at home. The "Home Access Express HIV-1 Test System, a close family friend she had known for a long time, was starting to stay overnight more and more often HIV and AIDS. You may have thought that these diseases weren't your problem and that only younger

  20. Spectro-Microscopic Measurements of Carbonaceous Aerosol Aging...

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

    of Carbonaceous Aerosol Aging in Central California. Abstract: Carbonaceous aerosols are responsible for large uncertainties in climate models, degraded visibility, and...

  1. aging colloidal glass: Topics by E-print Network

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

    Matter (arXiv) Summary: We use confocal microscopy to directly visualize the dynamics of aging colloidal glasses. We prepare a colloidal suspension at high density, a...

  2. aged patients usefulness: Topics by E-print Network

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

    (6-month old, 12-month old, and adult) based on auditory event-related potentials Reilly, James P. 34 USING OBJECTIVE CRITERIA AND MULTIPLE REGRESSION MODELS FOR AGE...

  3. accelerated aging studies: Topics by E-print Network

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

    the nominal one, increasing background and pile-up event probability. This requires detector performances which are currently under study in intensive R&D activities. Aging is...

  4. age spectrum epidemiology: Topics by E-print Network

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

    of a young supernova. We associate this break with the phenomenon of synchrotron aging of radiating electrons. From the break in the spectrum we calculate the magnetic field...

  5. aging aircraft wiring: Topics by E-print Network

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

    energy of the particle detected. Nevertheless, many factors can contribute to detector aging effects which are visible in a loss of gain caused by deposition of contaminants on...

  6. age xenocrystic zircons: Topics by E-print Network

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

    zircon age populations suggest that deposition of the extensive 1 km-thick clastic sequence at the base of the cover succession commenced in latest Neoproterozoic and terminated...

  7. age experimental analysis: Topics by E-print Network

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

    Websites Summary: , by improving the seismic hazard evaluation using probabilistic seismic hazard assessment (PSHA) methodsSeismic vulnerability assessment to slight dam- age...

  8. age mexican children: Topics by E-print Network

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

    surface area, and thickness measures were obtained. Anxiety symptoms were 18 Tackling Dyslexia at an Early Age esearchers at HMS and Boston Children's Biology and Medicine Websites...

  9. age children group: Topics by E-print Network

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

    surface area, and thickness measures were obtained. Anxiety symptoms were 22 Tackling Dyslexia at an Early Age esearchers at HMS and Boston Children's Biology and Medicine Websites...

  10. aged children hbsc: Topics by E-print Network

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

    surface area, and thickness measures were obtained. Anxiety symptoms were 13 Tackling Dyslexia at an Early Age esearchers at HMS and Boston Children's Biology and Medicine Websites...

  11. age children preliminary: Topics by E-print Network

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

    surface area, and thickness measures were obtained. Anxiety symptoms were 17 Tackling Dyslexia at an Early Age esearchers at HMS and Boston Children's Biology and Medicine Websites...

  12. Aging Impairs Myocardial Fatty Acid and Ketone Oxidation and...

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

    that aging modifies substrate utilization and alters insulin sensitivity in mouse heart when provided multiple substrates. In vivo cardiac function was measured with...

  13. age metamorphic history: Topics by E-print Network

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

    (TRFs) shorten predictably with age in a particular tissue Vleck, Carol 11 Thermal and Impact History of the H Chondrite Parent Asteroid during Metamorphism: Constraints from...

  14. Schistosomiasis models with density dependence and age of ...

    E-Print Network [OSTI]

    2002-04-08T23:59:59.000Z

    type of validation concerning the new features being added and the extent to ... an age structure in the class of infected snails, since their cercarial production.

  15. age tumor size: Topics by E-print Network

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

    alternate body arches, fin cartilage 422 AGE AND GROWTH OF SKIPJACK TUNA, KATSUWONUS PELAMIS, AND YELLOWFIN TUNA, THUNNUS ALBACARES, AS INDICATED Environmental Sciences and...

  16. Influence of Aging and Environment on Nanoparticle Chemistry...

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

    of cerium in cerium oxide nanoparticles is studied in detail. The influence of synthesis medium, aging time and local environment on the oxidation state switching, between +3 and...

  17. Bacteria and the Aging and Longevity of Caenorhabditis elegans

    E-Print Network [OSTI]

    Kim, Dennis H.

    The molecular genetic analysis of longevity of Caenorhabditis elegans has yielded fundamental insights into evolutionarily conserved pathways and processes governing the physiology of aging. Recent studies suggest that ...

  18. aged adults: Topics by E-print Network

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

    The "Aging in Place" project strives to delay taking that first step away from the family home. Through the careful placement of technological support we believe older...

  19. Notes on Groundwater Age in Forward and Inverse Modeling

    E-Print Network [OSTI]

    Ginn, Timothy R.; Haeri, Hanieh; Massoudieh, Arash; Foglia, Laura

    2009-01-01T23:59:59.000Z

    from radiocarbon dating of groundwater and numerical ?ow andReply to Comment on groundwater age, life expectancy andanalysis of regional groundwater ?ow. 2. Effect of water-

  20. age care managers: Topics by E-print Network

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

    2 Managing Prosperity: Estate and Retirement Planning for All Ages Planning for Long-Term Health Care Computer Technologies and Information Sciences Websites Summary: 15 million by...

  1. Solar-powered turbocompressor heat pump system

    DOE Patents [OSTI]

    Landerman, A.M.; Biancardi, F.R.; Melikian, G.; Meader, M.D.; Kepler, C.E.; Anderson, T.J.; Sitler, J.W.

    1982-08-12T23:59:59.000Z

    The turbocompressor comprises a power turbine and a compressor turbine having respective rotors and on a common shaft, rotatably supported by bearings. A first working fluid is supplied by a power loop and is expanded in the turbine. A second working fluid is compressed in the turbine and is circulated in a heat pump loop. A lubricant is mixed with the second working fluid but is excluded from the first working fluid. The bearings are cooled and lubricated by a system which circulates the second working fluid and the intermixed lubricant through the bearings. Such system includes a pump, a thermostatic expansion valve for expanding the working fluid into the space between the bearings, and a return conduit system for withdrawing the expanded working fluid after it passes through the bearings and for returning the working fluid to the evaporator. A shaft seal excludes the lubricant from the power turbine. The power loop includes a float operable by liquid working fluid in the condenser for controlling a recirculation valve so as to maintain a minimum liquid level in the condenser, while causing a feed pump to pump most of the working fluid into the vapor generator. The heat pump compressor loop includes a float in the condenser for operating and expansion valve to maintain a minimum liquid working fluid level in the condenser while causing most of the working fluid to be expanded into the evaporator.

  2. Attitudes to ageing : a systematic review of attitudes to ageing and mental health, and a cross-sectional analysis of attitudes to ageing and quality of life in older adults

    E-Print Network [OSTI]

    Long, Sarah Charlotte May

    2014-07-01T23:59:59.000Z

    This thesis portfolio examines attitudes to ageing in older adults, and explores the impact that attitudes to ageing have on mental health status and quality of life. Attitudes to ageing are becoming more widely measured ...

  3. Impact of structural aging on seismic risk assessment of reinforced concrete structures in nuclear power plants

    SciTech Connect (OSTI)

    Ellingwood, B.; Song, J. [Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Civil Engineering

    1996-03-01T23:59:59.000Z

    The Structural Aging Program is addressing the potential for degradation of concrete structural components and systems in nuclear power plants over time due to aging and aggressive environmental stressors. Structures are passive under normal operating conditions but play a key role in mitigating design-basis events, particularly those arising from external challenges such as earthquakes, extreme winds, fires and floods. Structures are plant-specific and unique, often are difficult to inspect, and are virtually impossible to replace. The importance of structural failures in accident mitigation is amplified because such failures may lead to common-cause failures of other components. Structural condition assessment and service life prediction must focus on a few critical components and systems within the plant. Components and systems that are dominant contributors to risk and that require particular attention can be identified through the mathematical formalism of a probabilistic risk assessment, or PRA. To illustrate, the role of structural degradation due to aging on plant risk is examined through the framework of a Level 1 seismic PRA of a nuclear power plant. Plausible mechanisms of structural degradation are found to increase the core damage probability by approximately a factor of two.

  4. Submerged Medium Voltage Cable Systems at Nuclear Power Plants...

    Office of Scientific and Technical Information (OSTI)

    Submerged Medium Voltage Cable Systems at Nuclear Power Plants: A Review of Research Efforts Relevant to Aging Mechanisms and Condition Monitoring. Re-direct Destination: In a...

  5. Sustainable Design Standards in India: The Excluded Issues

    E-Print Network [OSTI]

    Gupta, K.; Haider, J.

    Due to the recent emphasis on Green Building in different countries around the world, LEED (Leadership in Energy and Environmental Design) certification has emerged as one of the major recognized standards for measuring building sustainability...

  6. ANY PROPRIETOR/PARTNER/EXECUTIVE OFFICER/MEMBER EXCLUDED?

    E-Print Network [OSTI]

    THE INSURER, ITS AGENTS OR REPRESENTATIVES. AUTHORIZED REPRESENTATIVE INSURER A: INSURER B: INSURER C: INSURER between the issuing insurer(s), authorized representative or producer, and the certificate holder, nor

  7. Sustainable Design Standards in India: The Excluded Issues

    E-Print Network [OSTI]

    Gupta, K.; Haider, J.

    2008-01-01T23:59:59.000Z

    Due to the recent emphasis on Green Building in different countries around the world, LEED (Leadership in Energy and Environmental Design) certification has emerged as one of the major recognized standards for measuring building sustainability...

  8. Evaluation Ratings Definitions (Excluding Utilization of Small Business)

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011AT&T,OfficeEnd of Year 2010Salt | Department of EnergyBehaviors:Energy Chapter

  9. Guidelines Establishing Criteria for Excluding Buildings from the Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy ChinaofSchaefer To: CongestionDevelopment ofofthePerformance Requirements of Section 543

  10. National Environmental Policy Act (NEPA) Categorically Excluded Actions |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015of 2005 attheMohammed Khan -Department of Energy 8, 2011, DOERFIDepartment

  11. Nuclear Deterrence in the Age of Nonproliferation

    SciTech Connect (OSTI)

    Richardson, J

    2009-01-21T23:59:59.000Z

    The fallacy of zero nuclear weapons, even as a virtual goal, is discussed. Because the complete abolition of nuclear weapons is not verifiable, nuclear weapons will always play a role in the calculus of assure, dissuade, deter and defeat (ADDD). However, the relative contribution of nuclear weapons to international security has diminished. To reconstitute the Cold War nuclear capability, with respect to both the nuclear weapons capability and their associated delivery systems, is fiscally daunting and not warranted due to competing budgetary pressures and their relative contribution to international security and nonproliferation. A proposed pathway to a sustainable nuclear weapons capability end-state is suggested which provides enough ADDD; a Dyad composed of fewer delivery and weapon systems, with trickle production at the National Laboratories and private sector to maintain capability and guard against technological surprise.

  12. Living and Dying Abroad: Aspects of Egyptian Cultural Identity in Late Bronze Age and Early Iron Age Canaan

    E-Print Network [OSTI]

    Pierce, Krystal Victoria Lords

    2013-01-01T23:59:59.000Z

    74 lamps, one biconical strainer-spouted jug, one pyxis, 25Age pottery like the biconical strainer- spouted jug and theand bronze juglet, strainer, lamp, and deep hemispherical

  13. THE ROLE OF AGING AND ONCE-THROUGH-COOLED POWER

    E-Print Network [OSTI]

    CALIFORNIA ENERGY COMMISSION THE ROLE OF AGING AND ONCE-THROUGH-COOLED POWER PLANTS IN CALIFORNIA Nyberg, Darryl Metz, Connie Leni. 2009. The Role of Aging and Once-Through-Cooled Power Plants .......................................9 The Performance of Once-Through-Cooled Power Plants 2002

  14. AGEING NORTH AMERICAN LANDBIRDS BY MOLT LIMITS AND PLUMAGE CRITERIA

    E-Print Network [OSTI]

    DeSante, David F.

    TO THE IDENTIFICATION GUIDE TO NORTH AMERICAN BIRDS, PART I Dan Froehlich Slate Creek Press #12;AGEING NORTH AMERICAN TO NORTH AMERICAN BIRDS, PART I Dan Froehlich Slate Creek Press Bolinas, California #12;Ageing North by David F. DeSante, Peter Pyle, and Nicole Michel for Slate Creek Press, P.O. Box 219, Bolinas, California

  15. Communicating Coastal Risk Analysis in an Age of Climate Change

    E-Print Network [OSTI]

    Communicating Coastal Risk Analysis in an Age of Climate Change TR-11-04 Brian Blanton, John Mc in an Age of Climate Change Brian Blanton, John McGee, Oleg Kapeljushnik Renaissance Computing Institute of climate change complicates matters further. An immersive visualization environment integrating data from

  16. aging materials: Topics by E-print Network

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

    aging materials First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Ageing and Rheology in Soft Materials...

  17. Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded Verification Concluding Remarks Part II (Companion presentation) Asphalt Pavements Effect of Aging: Asphalt concrete pavements (Part II) E1 E2 E3 Eh 1 2 3 h #12;Graded Finite Elements Graded Elements

  18. Revised isotopic (40 Ar) age for the lamproite volcano of

    E-Print Network [OSTI]

    Utrecht, Universiteit

    Revised isotopic (40 Ar/39 Ar) age for the lamproite volcano of Cabezos Negros, Fortuna Basin (lamproites) of the Fortuna Basin in southeast Spain. This age is significantly older than earlier reported K. Because the volcanic rocks are intercalated in the stratigraphic sequence of the Fortuna Basin directly

  19. International Trade in Natural Gas: Golden Age of LNG?

    E-Print Network [OSTI]

    Gabrieli, John

    International Trade in Natural Gas: Golden Age of LNG? Yichen Du and Sergey Paltsev Report No. 271;1 International Trade in Natural Gas: Golden Age of LNG? Yichen Du* and Sergey Paltsev* Abstract The introduction of liquefied natural gas (LNG) as an option for international trade has created a market for natural gas where

  20. Lading of the Late Bronze Age ship at Uluburun

    E-Print Network [OSTI]

    Lin, Shih-Han Samuel

    2012-08-29T23:59:59.000Z

    clear indication of a Late Bronze Age site. This find was of considerable interest as very little is known about seafaring, long distance trade, and ship construction during the Late Bronze Age, except for a glimpse provided by the Cape Gelidonya...

  1. Aging management guideline for commercial nuclear power plants-pumps

    SciTech Connect (OSTI)

    Booker, S.; Katz, D.; Daavettila, N.; Lehnert, D. [MDC-Ogden Environmental and Energy Services, Southfield, MI (United States)

    1994-03-01T23:59:59.000Z

    This Aging Management Guideline (AMG) describes recommended methods for effective detection and mitigation of age-related degradation mechanisms in BWR and PWR commercial nuclear power plant pumps important to license renewal. The intent of this AMG is to assist plant maintenance and operations personnel in maximizing the safe, useful life of these components. It also supports the documentation of effective aging management programs required under the License Renewal Rule 10 CFR Part 54. This AMG is presented in a manner that allows personnel responsible for performance analysis and maintenance to compare their plant-specific aging mechanisms (expected or already experienced) and aging management program activities to the more generic results and recommendations presented herein.

  2. EVOLUTION OF AGING AND LATE LIFE Casandra L. Rauser, Laurence D. Mueller,

    E-Print Network [OSTI]

    Rose, Michael R.

    551 18 EVOLUTION OF AGING AND LATE LIFE Casandra L. Rauser, Laurence D. Mueller, Michael Travisano of Aging Specific Population Genetic Hypotheses for Aging THE ROLE OF EXPERIMENTAL EVOLUTION IN TESTING HAMILTONIAN THEORIES OF AGING Laboratory Evolution of Aging Experimental Population Genetics of Aging

  3. Continuous Commissioning in an Aged Office Building

    E-Print Network [OSTI]

    Cui, Y.; Liu, M.

    2005-01-01T23:59:59.000Z

    exchanger provides hot water to the perimeter induction units and AHUs. The HVAC systems operate from 5:00 a.m. to 7:00 p.m. generally during the weekdays and from 7:00 a.m. to 3:00 p.m. on Saturday. After the CC SM survey and study... was developed. Instead of being constant, supply air temperature set point increases when the outside air temperature decreases in the winter since heating is needed in both areas. Fig. 5 shows the CC SM control schedule. Mixed air temperature set points...

  4. Documenting stone age cleverness by tool development

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContract ManagementDiscovering How Muscles ReallyDDTIV SystemVIII

  5. CDF Run-II Silicon Detector: Operations and Aging

    SciTech Connect (OSTI)

    Stancari, Michelle; /Fermilab

    2011-09-10T23:59:59.000Z

    The CDF Run-II silicon microstrip detector has seen almost 12 fb{sup -1} of proton-antiproton collisions over the last 10 years. It has shown remarkable performance, with 80% of its channels still operating error-free, and only one of its eight layers approaching the operational limits for full depletion. The measured depletion voltage and signal-to-noise ratio of these sensors give unique information about the behavior of sensors irradiated slowly over a long period of time. Data from heavily irradiated, double-sided sensors excludes a monotonic electric field inside the sensor and is instead consistent with a doubly-peaked field that is lower in the center of the sensor and higher at the edges.

  6. PIXE, Micro-PIXE and RBS Analysis of Thermal Aged Rubber Material : On The Additives Behaviour Versus Aging Time

    E-Print Network [OSTI]

    Boyer, Edmond

    PIXE, Micro-PIXE and RBS Analysis of Thermal Aged Rubber Material : On The Additives Behaviour Villeurbanne Cedex-France. ABSTRACT PIXE, micro-PIXE and RBS techniques were employed to monitor the behaviour of the rubber material itself. Keywords : PIXE, micro-PIXE, RBS, Rubber, Thermal Aging, Segregation, Additives

  7. Aging mechanism in tunable Pickering emulsion

    E-Print Network [OSTI]

    S. Fouilloux; A. Thill; J. Daillant; F. Malloggi

    2015-04-16T23:59:59.000Z

    We study the stability of a model Pickering emulsion system. A special counter-flow microfluidics set-up was used to prepare monodisperse Pickering emulsions, with oil droplets in water. The wettability of the monodisperse silica nanoparticles (NPs) could be tuned by surface grafting and the surface coverage of the droplets was controlled using the microfluidics setup. A surface coverage as low as 23$\\%$ is enough to stabilize the emulsions and we evidence a new regime of Pickering emulsion stability where the surface coverage of emulsion droplets of constant size increases in time, in coexistence with a large amount of dispersed phase. Our results demonstrate that the previously observed limited coalescence regime where surface coverage tends to control the average size of the final droplets must be put in a broader perspective.

  8. A comparison of recharge rates in aquifers of the United States based on groundwater-age data

    E-Print Network [OSTI]

    . McMahon & L. N. Plummer & J. K. Bhlke & S. D. Shapiro & S. R. Hinkle Abstract An overview of recharge in selected unconfined aquifer systems of the United States. Apparent age distributions, numerical hydraulic modeling, water-table fluctuations, stream base-flow separation, and various other types

  9. Composites Part A, 34, 979-986 (2003) Author prepared reprint Hygrothermal Aging of Polyimide Matrix Composite Laminates

    E-Print Network [OSTI]

    Nairn, John A.

    2003-01-01T23:59:59.000Z

    Composites Part A, 34, 979-986 (2003) Author prepared reprint Hygrothermal Aging of Polyimide of Utah, Salt Lake City, Utah 84112, USA ABSTRACT Two polyimide-matrix systems (Avimid R K3B/IM7 and PETI; accelerated test method; hygrothermal stability. Introduction Various types of polyimide-matrix composites

  10. A Simplified Electrochemical and Thermal Aging Model of LiFePO4-Graphite Li-ion Batteries

    E-Print Network [OSTI]

    1 A Simplified Electrochemical and Thermal Aging Model of LiFePO4-Graphite Li-ion Batteries: Power of a commercial LiFePO4-graphite Li-ion battery. Compared to the isothermal reference, the mechanism of porosity;2 Due to their high power and energy densities, Li-ion technologies are the leading battery systems

  11. sup 40 Ar/ sup 39 Ar ages of six Apollo 15 impact melt rocks by laser step heating

    SciTech Connect (OSTI)

    Dalrymple, G.B. (Geological Survey, Menlo Park, CA (USA)); Ryder, G. (Lunar and Planetary Inst., Houston, TX (USA))

    1991-06-01T23:59:59.000Z

    The authors have obtained 15 high resolution (21-51 step) {sup 40}Ar/{sup 39}Ar age spectra on six Apollo 15 impact melt rocks of different compositions using a continuous laser system on submilligram subsamples and on single crystal plagioclase clasts. Four of the six samples gave reproducible age spectra with well-defined intermediate temperature plateaus over 48% or more of the {sup 39}AR released; the plateaus are interpreted as crystallization ages. Samples 15304,7,69, 15294,6,21, and 15314,26,156 gave virtually identical plateau ages whose weighted mean is 3,870 {plus minus} 6 Ma. These three melt rocks differ in composition and likely formed in three separate impact events. Sample 15356,9 gave replicate plateau ages that average 3,836 {plus minus} 12 Ma and date a fourth and younger impact event. The age spectra for samples 15308,9 and 15414,3,36 increase with increasing increment temperature and may have been formed in or affected by impacts at about 2,700 Ma and 3,870 Ma, respectively. So far there continues to be no convincing evidence in the lunar record for impact melts older than about 3.9 Ga.

  12. DETERMINING THE EFFECTS OF RADIATION ON AGING CONCRETE STRUCTURES OF NUCLEAR REACTORS

    SciTech Connect (OSTI)

    Serrato, M.

    2010-01-29T23:59:59.000Z

    The U.S. Department of Energy Office of Environmental Management (DOE-EM) is responsible for the Decontamination and Decommissioning (D&D) of nuclear facilities throughout the DOE Complex. Some of these facilities will be completely dismantled, while others will be partially dismantled and the remaining structure will be stabilized with cementitious fill materials. The latter is a process known as In-Situ Decommissioning (ISD). The ISD decision process requires a detailed understanding of the existing facility conditions, and operational history. System information and material properties are need for aged nuclear facilities. This literature review investigated the properties of aged concrete structures affected by radiation. In particular, this review addresses the Savannah River Site (SRS) isotope production nuclear reactors. The concrete in the reactors at SRS was not seriously damaged by the levels of radiation exposure. Loss of composite compressive strength was the most common effect of radiation induced damage documented at nuclear power plants.

  13. Ageing studies of resistive Micromegas detectors for the HL-LHC

    E-Print Network [OSTI]

    Galn, J; Ferrer-Ribas, E; Giganon, A; Giomataris, I; Herlant, S; Jeanneau, F; Peyaud, A; Schune, Ph; Alexopoulos, T; Byszewski, M; Iakovidis, G; Iengo, P; Ntekas, K; Leontsinis, S; de Oliveira, R; Tsipolitis, Y; Wotschack, J

    2013-01-01T23:59:59.000Z

    Resistive-anode Micromegas detectors are in development since several years, in an effort to solve the problem of sparks when working in high flux and high radiations environment like in the HL-LHC (ten times the luminosity of the LHC). They have been chosen as one of the technologies that will be part of the ATLAS New Small Wheel project (forward muon system). An ageing study is mandatory to assess their capabilities to handle the HL-LHC environment on a long-term period. A prototype has been exposed to several types of irradiations (X-rays, cold neutrons, 60 Co gammas) up to an equivalent HL-LHC time of more than five years without showing any degradation of the performances in terms of gain and energy resolution. Beam test studies took place in October 2012 to assess the tracking performances (efficiency, spatial resolution,...). Results of ageing studies and beam test performances are reported in this paper.

  14. Ageing studies of resistive Micromegas detectors for the HL-LHC

    E-Print Network [OSTI]

    J. Galan; D. Attie; E. Ferrer-Ribas; A. Giganon; I. Giomataris; S. Herlant; F. Jeanneau; A. Peyaud; Ph. Schune; T. Alexopoulos; M. Byszewski; G. Iakovidis; P. Iengo; K. Ntekas; S. Leontsinis; R. de Oliveira; Y. Tsipolitis; J. Wotschack

    2013-04-07T23:59:59.000Z

    Resistive-anode Micromegas detectors are in development since several years, in an effort to solve the problem of sparks when working in high flux and high radiations environment like in the HL-LHC (ten times the luminosity of the LHC). They have been chosen as one of the technologies that will be part of the ATLAS New Small Wheel project (forward muon system). An ageing study is mandatory to assess their capabilities to handle the HL-LHC environment on a long-term period. A prototype has been exposed to several types of irradiations (X-rays, cold neutrons, 60 Co gammas) up to an equivalent HL-LHC time of more than five years without showing any degradation of the performances in terms of gain and energy resolution. Beam test studies took place in October 2012 to assess the tracking performances (efficiency, spatial resolution,...). Results of ageing studies and beam test performances are reported in this paper.

  15. Radiolysis and Ageing of C2-BTP in Cinnamaldehyde/Hexanol Mixtures

    SciTech Connect (OSTI)

    Fermvik, Anna; Ekberg, Christian; Retegan, Teodora; Skarnemark, Gunnar [Nuclear Chemistry, Chalmers University of Technology, Kemiv. 4, Gothenburg, SE-412 96 (Sweden)

    2007-07-01T23:59:59.000Z

    The separation of actinides from lanthanides is an important step in the alternative methods for nuclear waste treatment currently under development. Polycyclic molecules containing nitrogen are synthesised and used for solvent extraction. A potential problem in the separation process is the degradation of the molecule due to irradiation or ageing. An addition of nitrobenzene has proved to have an inhibitory effect on degradation when added to a system containing C2-BTP in hexanol before irradiation. In this study, 2,6-di(5,6-diethyl-1,2,4-triazine-3-yl)pyridine (C2-BTP) was dissolved in different mixtures of cinnamaldehyde and hexanol and the effects on extraction after ageing and irradiation were investigated. Similar to nitrobenzene, cinnamaldehyde contains an aromatic ring which generally has a relatively high resistance towards radiolysis. Both C2-BTP in cinnamaldehyde and C2-BTP in hexanol seem to degrade with time. The system with C2-BTP in pure hexanol is relatively stable up to 17 days but then starts slowly to degrade. The solution with pure cinnamaldehyde as diluent started to degrade after only {approx}20 hours. The opposite is true for degradation caused by radiolysis; hexanol systems are more sensitive to radiolysis than cinnamaldehyde systems. Most of the radiolytic degradation took place during the first days of irradiation, up to a dose of 4 kGy. (authors)

  16. The Effects of Ageing on Memory and Thinking

    E-Print Network [OSTI]

    Ford, Amanda

    2007-01-01T23:59:59.000Z

    The main aim of the present study is to examine the effects of ageing on memory and thinking by examining verbal fluency performance. More specifically looking at the differences between older and younger people, to ...

  17. ageing seed pools: Topics by E-print Network

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

    of the methods, expense, and logistics of sample collection. The ability to inventory wild populations would be greatly expanded if pooled adult age-class data (e.g.,...

  18. age infant sex: Topics by E-print Network

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

    old, 12-month old, and adult) based on auditory event-related potentials Reilly, James P. 13 RESEARCH ARTICLE Open Access Sex-related differences and age of peak Physics...

  19. advancing age potential: Topics by E-print Network

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

    old, 12-month old, and adult) based on auditory event-related potentials Reilly, James P. 10 Paradoxical down?regulation of p16 INK4a mRNA with advancing age in Acute...

  20. aging degradation study: Topics by E-print Network

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

    detector performances which are currently under study in intensive R&D activities. Aging is one of the key issues for a high-luminosity LHC application. For this reason, we...

  1. aging decreases expression: Topics by E-print Network

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

    interacting sensory stimuli... Duncan, Nikki 2013-03-13 35 Analysis of Telomere Length in the Aged mdx Diaphragm with and without Transgenic IGF-I Expression CiteSeer...

  2. Maximum Entry and Mandatory Separation Ages for Certain Security Employees

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

    2001-10-11T23:59:59.000Z

    The Policy in response to government-wide Office of Personnel Management regulations regarding establishment of mandatory retirement ages for employees in certain security related positions. Superseded by DOE P 310.1 Admin Chg 1, 12-1-11.

  3. Enzyme Structure Provides Insights into Cancer and Aging

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

    Enzyme Structure Provides Insights into Cancer and Aging Print XPD helicase is an enzyme that unwinds the DNA double helix; it is one component of an essential repair mechanism...

  4. administration normative aging: Topics by E-print Network

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

    U.S:pr.aoa.dhhs.govaoastatsaging21demography.html . Administration on Aging. 1999. Profile of Older Americans: 1999. U.S. Department:pr.aoa.dhhs.govaoastatsprofile...

  5. Health, Ageing and Ethnicity: A Retrospective and Prospects

    E-Print Network [OSTI]

    Health, Ageing and Ethnicity: A Retrospective and Prospects Naina Patel, PhD. Dr. Patel called Minority Elderly Care (MEC) under the EC 5th Framework Research Programme. Formerly the UK

  6. Cognitive training in schizophrenia: golden age or wild west?

    E-Print Network [OSTI]

    Vinogradov, Sophia

    2013-01-01T23:59:59.000Z

    Golden Age or Wild West? Sophia Vinogradov, Melissa Fisher,Address correspondence to Sophia Vinogradov, M.D. , 116AFrancisco, CA 94121; E-mail: sophia. vinogradov@ucsf.edu.

  7. Figure 2. Stratigraphic Summary of Ages, Names and Rock Types...

    Gasoline and Diesel Fuel Update (EIA)

    2. Stratigraphic Summary of Ages, Names and Rock Types in the ANWR 1002 and Coastal Plain Area of the Alaska North Slope. Potentially Productive Reservoirs and Plays Assessed by...

  8. r Journalof Geology LATE ARCHEAN ZIRCON AGES 419

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    sows t at t e popu a Ion 0 zIrcons in the banded granulite Ch Zr I, which record ages 238UfO6Pb at 2622

  9. arabian iron age: Topics by E-print Network

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

    iron deficiency should be the goal of nutritional intervention programs. In the United States, approximately 5 % of children from 1-5 years of age suffer from iron deficiency...

  10. ageing study bhas: Topics by E-print Network

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

    Growing-Stock Study at Age 401 William W. Oliver2 Abstract in the southwestern United States (Oliver and Ryker 1990). Throughout this vast area ponderosa pine is one of the most...

  11. aging study bhas: Topics by E-print Network

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

    Growing-Stock Study at Age 401 William W. Oliver2 Abstract in the southwestern United States (Oliver and Ryker 1990). Throughout this vast area ponderosa pine is one of the most...

  12. The Age of the Galaxy from Thorium Cosmochronometry

    E-Print Network [OSTI]

    C. Sneden; J. J. Cowan

    2000-08-11T23:59:59.000Z

    The long-lived radioactive element thorium can potentially provide a simple and direct clock to determine the age of our Galaxy. Spectroscopic investigations of thorium in metal-poor stars have yielded some promising initial results. We discuss the major observational and theoretical limitations in thorium cosmochronometry, and point out the ways in which the implied Galactic ages from thorium abundances can be made more accurate.

  13. Accident sequence precursor events with age-related contributors

    SciTech Connect (OSTI)

    Murphy, G.A.; Kohn, W.E.

    1995-12-31T23:59:59.000Z

    The Accident Sequence Precursor (ASP) Program at ORNL analyzed about 14.000 Licensee Event Reports (LERs) filed by US nuclear power plants 1987--1993. There were 193 events identified as precursors to potential severe core accident sequences. These are reported in G/CR-4674. Volumes 7 through 20. Under the NRC Nuclear Plant Aging Research program, the authors evaluated these events to determine the extent to which component aging played a role. Events were selected that involved age-related equipment degradation that initiated an event or contributed to an event sequence. For the 7-year period, ORNL identified 36 events that involved aging degradation as a contributor to an ASP event. Except for 1992, the percentage of age-related events within the total number of ASP events over the 7-year period ({approximately}19%) appears fairly consistent up to 1991. No correlation between plant ape and number of precursor events was found. A summary list of the age-related events is presented in the report.

  14. Evidence of aging effects on certain safety-related components

    SciTech Connect (OSTI)

    Magleby, H.L.; Atwood, C.L.; MacDonald, P.E.; Edson, J.L.; Bramwell, D.L. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States)

    1996-01-01T23:59:59.000Z

    In response to interest shown by the Nuclear Energy Agency (NEA), Principal Working Group I (PWG- 1) of the Committee on the Safety of Nuclear Installations (CSNI) conducted a generic study on the effects of aging of active components in nuclear power plants. (This focus on active components is consistent with PWG-l`s mandate; passive components are primarily within the mandate of PWG-3.) Representatives from France, Sweden, Finland, Japan, the United States, and the United Kingdom participated in the study by submitting reports documenting aging studies performed in their countries. This report consists of summaries of those reports, along with a comparison of the various statistical analysis methods used in the studies. The studies indicate that with some exceptions, active components generally do not present a significant aging problem in nuclear power plants. Design criteria and effective preventative maintenance programs, including timely replacement of components, are effective in mitigating potential aging problems. However, aging studies (such as qualitative and statistical analyses of failure modes and maintenance data) are an important part of efforts to identify and solve potential aging problems. Solving these problems typically includes such strategies as replacing suspect components with improved components, and implementing improved maintenance programs.

  15. Age characteristics in a multidecadal Arctic sea ice simulation

    SciTech Connect (OSTI)

    Hunke, Elizabeth C [Los Alamos National Laboratory; Bitz, Cecllia M [UNIV. OF WASHINGTON

    2008-01-01T23:59:59.000Z

    Results from adding a tracer for age of sea ice to a sophisticated sea ice model that is widely used for climate studies are presented. The consistent simulation of ice age, dynamics, and thermodynamics in the model shows explicitly that the loss of Arctic perennial ice has accelerated in the past three decades, as has been seen in satellite-derived observations. Our model shows that the September ice age average across the Northern Hemisphere varies from about 5 to 8 years, and the ice is much younger (about 2--3 years) in late winter because of the expansion of first-year ice. We find seasonal ice on average comprises about 5% of the total ice area in September, but as much as 1.34 x 10{sup 6} km{sup 2} survives in some years. Our simulated ice age in the late 1980s and early 1990s declined markedly in agreement with other studies. After this period of decline, the ice age began to recover, but in the final years of the simulation very little young ice remains after the melt season, a strong indication that the age of the pack will again decline in the future as older ice classes fail to be replenished. The Arctic ice pack has fluctuated between older and younger ice types over the past 30 years, while ice area, thickness, and volume all declined over the same period, with an apparent acceleration in the last decade.

  16. Long-Term Follow-Up of Dose-Adapted and Reduced-Field Radiotherapy With or Without Chemotherapy for Central Nervous System Germinoma

    SciTech Connect (OSTI)

    Jensen, Ashley W. [Department of Radiation Oncology, Mayo Clinic, Rochester, MN (United States); Issa Laack, Nadia N., E-mail: laack.nadia@mayo.ed [Department of Radiation Oncology, Mayo Clinic, Rochester, MN (United States); Buckner, Jan C. [Department of Oncology, Mayo Clinic, Rochester, MN (United States); Schomberg, Paula J. [Department of Radiation Oncology, Mayo Clinic, Rochester, MN (United States); Wetmore, Cynthia J. [Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN (United States); Brown, Paul D. [Department of Radiation Oncology, Mayo Clinic, Rochester, MN (United States)

    2010-08-01T23:59:59.000Z

    Purpose: To update our institutional experience with neoadjuvant chemotherapy and minimized radiotherapy vs. radiation monotherapy for intracranial germinoma. Methods and Materials: We retrospectively reviewed records of 59 patients with diagnosis of primary intracranial germinoma between 1977 and 2007. Treatment was irradiation alone or neoadjuvant platinum-based chemotherapy and local irradiation (initial tumor plus margin) for patients with localized complete response and reduced-dose craniospinal irradiation for others. Results: For the chemoradiotherapy group (n = 28), median follow-up was 7 years. No patient died. The freedom from progression (FFP) rate was 88% at 5 years and 80% at 10 years. In 4 patients, disease recurred 1.1 to 6.8 years after diagnosis. All were young male patients who received 30.6 Gy to local fields after complete response to chemotherapy. The FFP rate was 88% for local irradiation vs. 100% for more extensive fields (p = .06). For the radiotherapy-alone group (n = 31), median follow-up was 15 years. Overall and disease-free survival rates were 93% and 93% at 5 years and 90% and 87% at 15 years. In 5 patients, disease recurred 1.1 to 4.9 years after diagnosis. Most patients in this group were young men 18 to 23 years of age with suprasellar primary disease treated with about 50 Gy to local fields. The FFP rate was 44% for local irradiation vs. 100% for more extensive fields (p < .01). Conclusions: The addition of neoadjuvant chemotherapy to local-field radiotherapy reduced central nervous system cancer recurrence when high-risk patients were excluded by thorough pretreatment staging. There was trend toward improved central nervous system tumor control when larger fields (whole brain, whole ventricle, or craniospinal axis) were used.

  17. A User Programmable Battery Charging System

    E-Print Network [OSTI]

    Amanor-Boadu, Judy M

    2013-05-07T23:59:59.000Z

    Rechargeable batteries are found in almost every battery powered application. Be it portable, stationary or motive applications, these batteries go hand in hand with battery charging systems. With energy harvesting being targeted in this day and age...

  18. Bronze metallurgy in Iron Age central Europe : a metallurgical study of Early Iron Age bronzes from Sti?na, Slovenia.

    E-Print Network [OSTI]

    Cooney, Elizabeth Myers

    2007-01-01T23:59:59.000Z

    The Early Iron Age (750-450 BCE) marks a time in the European Alpine Region in which cultural ideologies surrounding bronze objects and bronze production were changing. Iron was becoming the preferred material from which ...

  19. Influence of an adsorbing polymer in the aging dynamics of Laponite clay suspensions

    E-Print Network [OSTI]

    L. Zulian; B. Ruzicka; G. Ruocco

    2008-11-18T23:59:59.000Z

    Clay-polymer dispersions in aqueous solutions have attracted a great interest in recent years due to their industrial applications and intriguing physical properties. Aqueous solutions of bare Laponite particles are known to age spontaneously from an ergodic state to a non ergodic state in a time varying from hours to months depending on Laponite concentration. When a polymer species like Polyethylene Oxide (PEO) is added to the solution, it weakly adsorbs on clay particle surfaces modifying the effective interaction potential between Laponite particles. A dynamic light scattering study, varying polymer concentration at fixed polymer molecular weight (Mw=200.000 g/mol), has been performed in order to understand the effect of polymer on the aging dynamics of the system. The results obtained show that arresting phenomena between clay particles are hindered if PEO is added and consequently the aging dynamics slows down with increasing PEO concentration. This process is possibly due to the progressive coverage of the clay surface by polymers that grow with increasing PEO concentration and may lead to steric stabilization.

  20. Insights for aging management of light water reactor components: Metal containments. Volume 5

    SciTech Connect (OSTI)

    Shah, V.N.; Sinha, U.P. [EG and G Idaho, Inc., Idaho Falls, ID (United States); Smith, S.K. [Ogden Environmental and Energy Services, Southfield, MI (United States)

    1994-03-01T23:59:59.000Z

    This report evaluates the available technical information and field experience related to management of aging damage to light water reactor metal containments. A generic aging management approach is suggested for the effective and comprehensive aging management of metal containments to ensure their safe operation. The major concern is corrosion of the embedded portion of the containment vessel and detection of this damage. The electromagnetic acoustic transducer and half-cell potential measurement are potential techniques to detect corrosion damage in the embedded portion of the containment vessel. Other corrosion-related concerns include inspection of corrosion damage on the inaccessible side of BWR Mark I and Mark II containment vessels and corrosion of the BWR Mark I torus and emergency core cooling system piping that penetrates the torus, and transgranular stress corrosion cracking of the penetration bellows. Fatigue-related concerns include reduction in the fatigue life (a) of a vessel caused by roughness of the corroded vessel surface and (b) of bellows because of any physical damage. Maintenance of surface coatings and sealant at the metal-concrete interface is the best protection against corrosion of the vessel.

  1. Phase transformations in ferrite phase of a duplex stainless steel aged at 500[degree]C

    SciTech Connect (OSTI)

    Shiao, J.J.; Tsai, C.H.; Huang, J.H.; Kai, J.J. (National Tsing Hua Univ., Hsinchu (Taiwan, Province of China). Dept. of Nuclear Engineering)

    1993-12-01T23:59:59.000Z

    Due to their high strength, high corrosion resistance, and good properties of castings, duplex stainless steels are widely used in the recirculation system of nuclear power plants. Although the presence of ferrite phase increases the strength and the resistance to SCC, the ferrite phase also brings about thermal aging embrittlement known as 475 C embrittlement''. The room temperature impact strength can decrease by 80% after aging for 8 years at a temperature as low as 300 C. Much research has been performed on the low temperature embrittlement of duplex stainless steels. It is generally acknowledged that the spinodal decomposition in ferrite phase and precipitation of some other carbides or nickel silicide are responsible for the degradation in mechanical properties of duplex stainless steels at low temperatures. The extent of the degradation was found to be strongly dependent on the composition in ferrite, which is closely related to the change of microstructure. Thus, the exact evolution of phase transformation in ferrite has also drawn a large audience. In this study, using electron microscopy, the authors investigated the phase evolution of ferrite phase in duplex stainless steel, aged at 500 C. up to 10,000 hours.

  2. Fracture toughness test results of thermal aged reactor vessel materials

    SciTech Connect (OSTI)

    DeVan, M.J.; Lowe, A.L. Jr. [B and W Nuclear Technologies Inc., Lynchburg, VA (United States). Nuclear Engineering Dept.; Hall, J.B. [Babcock and Wilcox Co., Alliance, OH (United States)

    1996-12-31T23:59:59.000Z

    Thermal-aged surveillance materials consisting of Sa-533, Grade B, Class 1 plate material; SA-508, Class 2 forging material; and 2 Mn-Mo-Ni/Linde 80 weld metals were removed from two commercial reactor pressure vessels. The material from the first reactor vessel received a thermal exposure of approximately 103,000 hours at 282 C, while the material from the second reactor vessel received a thermal exposure of approximately 93,000 hours at 282 C. Tensile and 1/2 T compact fracture toughness specimens were fabricated from these materials and tested. In addition, to examine the effects of annealing, selected thermal-aged and unaged specimens were annealed at 454 C (850 F) and tested. Varying responses in the fracture toughness properties were observed for all materials after exposure to the thermal-aging temperature. The base metal plate had an observed decrease in J-values after its respective aging exposure, while no significant difference in the J-values were observed for the Linde 80 weld metals. No significant difference was seen in the J-data for the aged/annealed materials, but because of the small number of test specimens available, no conclusion could be determined for the response to annealing.

  3. The impact of minimum age of employment regulation on child labor and schooling

    E-Print Network [OSTI]

    Edmonds, Eric V

    Promoting minimum age of employment regulation has been a centerpiece in child labor policy for the last 15 years. If enforced, minimum age regulation would change the age profile of paid child employment. Using micro-data ...

  4. Hydraulic limitation not declining nitrogen availability causes the age-related photosynthetic decline in loblolly

    E-Print Network [OSTI]

    DeLucia, Evan H.

    Hydraulic limitation not declining nitrogen availability causes the age-related photosynthetic capacity and thus decreases GPP with increasing age; and (2) hydraulic limitations increasingly induce conservative with age. We conclude that hydraulic limitation increasingly limits the photosyn- thetic rates

  5. Environmental and age effects on methylation changes in human brain and blood cells

    E-Print Network [OSTI]

    Giguzinsky, Orit

    2014-01-01T23:59:59.000Z

    Previous studies have shown that DNA methylation may 1 e associated with disease, aging, the rate of aging and genetics. In this thesis, age is accurately predicted from DNA methylation in brain and blood tissues using two ...

  6. Plant Wide Energy Management and Reporting Systems Provide Sustainable Results

    E-Print Network [OSTI]

    Robinson, J. E.

    2007-01-01T23:59:59.000Z

    different steam production rates and operating conditions. Figure 3 - FFE Performance Calculation Basis TARGET PROFILE - PB#4 and PB#5 REMOVED Previous Advanced Control System - 1/1 to 12/31/2004 - 7,382 Hours 2004 Power Boiler PB#1, PB#2, and PB#3... of O p er at i o n Best 75th Ptile Poor Hours of Operation TARGET PROFILE - PB4 and PB5 Removed Previous Advanced Control Operational 1/1 to 12/31/2004-7,382 Hours Power Boiler PB#1, PB#2, and PB#3 - Excluding PB#4 and PB#5 Fossil Fuel Effectiveness...

  7. The impact of alpha/Fe enhanced stellar evolutionary tracks on the ages of elliptical galaxies

    E-Print Network [OSTI]

    Daniel Thomas; Claudia Maraston

    2003-02-04T23:59:59.000Z

    We complement our study of alpha/Fe enhanced stellar population models of Lick absorption indices (Thomas et al. 2003) by comparing two sets of alpha/Fe enhanced models. In both models the impact on Lick indices due to alpha/Fe enhancement is accounted for through a modification of the stellar absorption line-strengths using the response functions of Tripicco & Bell (1995). One set of models, however, uses solar-scaled, the other alpha/Fe enhanced stellar evolutionary tracks. Since the alpha/Fe enhanced tracks are hotter than the solar-scaled ones (Salasnich et al. 2000), the correspondent stellar population models have slightly weaker metallic indices (i.e. Mgb, etc.) and stronger Balmer line indices (Hbeta) (Maraston et al 2003). Here we explore quantitatively the impact of this effect on the alpha/Fe ratios, metallicities and ages that are derived for elliptical galaxies. We find that the modest decrease of the metallic indices Mgb and balance each other, such that fully consistent alpha/Fe ratios are derived for stellar systems using alpha/Fe enhanced models with either solar-scaled or alpha/Fe enhanced stellar tracks. The decrease of the metallic indices and the increase of Hbeta conspire in a way that also consistent metallicities are obtained. The derived ages, instead, are significantly different. The inclusion of alpha/Fe enhanced stellar tracks leads to the derivation of ages as high as 30 Gyr for elliptical galaxies. For the same objects, ages not older than 15 Gyr are obtained, if alpha/Fe enhanced models using solar-scaled tracks are adopted. This may indicate that current stellar evolutionary models overestimate the bluing of stellar evolutionary tracks due to alpha/Fe enhanced chemical mixtures at super-solar metallicities.

  8. Generalized Einstein Relation in an aging colloidal glass

    E-Print Network [OSTI]

    Brengre Abou; Franois Gallet; Pascal Monceau; Nolle Pottier

    2007-05-29T23:59:59.000Z

    We present an experimental and theoretical investigation of the Generalized Einstein Relation (GER), a particular form of a fluctuation-dissipation relation, in an out-of-equilibrium visco-elastic fluid. Micrometer beads, used as thermometers, are immersed in an aging colloidal glass to provide both fluctuation and dissipation measurements. The deviations from the Generalized Einstein Relation are derived as a function of frequency and aging time. The observed deviations from GER are interpreted as directly related to the change in the glass relaxation times with aging time. In our scenario, deviations are observed in the regime where the observation time scale is of the order of a characteristic relaxation time of the glass.

  9. Organic tanks safety program FY96 waste aging studies

    SciTech Connect (OSTI)

    Camaioni, D.M.; Samuels, W.D.; Linehan, J.C.; Clauss, S.A.; Sharma, A.K.; Wahl, K.L.; Campbell, J.A.

    1996-10-01T23:59:59.000Z

    Uranium and plutonium production at the Hanford Site produced large quantities of radioactive by-products and contaminated process chemicals, which are stored in underground tanks awaiting treatment and disposal. Having been made strongly alkaline and then subjected to successive water evaporation campaigns to increase storage capacity, the wastes now exist in the physical forms of salt cakes, metal oxide sludges, and partially saturated aqueous brine solutions. The tanks that contain organic process chemicals mixed with nitrate/nitrite salt wastes may be at risk for fuel- nitrate combustion accidents. The purpose of the Waste Aging Task is to elucidate how chemical and radiological processes will have aged or degraded the organic compounds stored in the tanks. Ultimately, the task seeks to develop quantitative measures of how aging changes the energetic properties of the wastes. This information will directly support efforts to evaluate the hazard as well as to develop potential control and mitigation strategies.

  10. Aging management of containment structures in nuclear power plants

    SciTech Connect (OSTI)

    Naus, D.J.; Oland, C.B. [Oak Ridge National Lab., TN (United States); Ellingwood, B.R. [The Johns Hopkins Univ., Baltimore, MD (United States); Graves, H.L. III; Norris, W.E. [US Nuclear Regulatory Commission, Washington, DC (United States)

    1994-12-31T23:59:59.000Z

    Research is being conducted by ORNL under US Nuclear Regulatory Commission (USNRC) sponsorship to address aging management of nuclear power plant containment and other safety-related structures. Documentation is being prepared to provide the USNRC with potential structural safety issues and acceptance criteria for use in continued service evaluations of nuclear power plants. Accomplishments include development of a Structural Materials Information Center containing data and information on the time variation of 144 material properties under the influence of pertinent environmental stressors or aging factors, evaluation of models for potential concrete containment degradation factors, development of a procedure to identify critical structures and degradation factors important to aging management, evaluations of nondestructive evaluation techniques. assessments of European and North American repair practices for concrete, review of parameters affecting corrosion of metals embedded in concrete, and development of methodologies for making current condition assessments and service life predictions of new or existing reinforced concrete structures in nuclear power plants.

  11. Aging of steel containments and liners in nuclear power plants

    SciTech Connect (OSTI)

    Naus, D.J.; Oland, C.B. [Oak Ridge National Lab., TN (United States). Engineering Technology Div.; Ellingwood, B. [Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Civil Engineering; Norris, W.E. [Nuclear Regulatory Commission, Washington, DC (United States). Office of Nuclear Regulatory Research

    1998-01-01T23:59:59.000Z

    Aging of the containment pressure boundary in light water reactor plants is being addressed to understand the significant factors relating occurrence of corrosion efficacy of inspection and structural capacity reduction of steel containments and liners of concrete containments. and to make recommendations on use of risk models in regulatory decisions. Current regulatory in-service inspection requirements are reviewed and a summary of containment related degradation experience is presented. Current and emerging nondestructive examination techniques and a degradation assessment methodology for characterizing and quantifying the amount of damage present are described. Quantitative tools for condition assessment of aging structures using time dependent structural reliability analysis methods are summarized. Such methods provide a framework for addressing the uncertainties attendant to aging in the decision process. Results of this research provide a means for establishing current and estimating future structural capacity margins of containments, and to address the significance of incidences of reported containment degradation.

  12. Age correlation of petroleum of unknown source using biological markers

    SciTech Connect (OSTI)

    Moldowan, J.M.; Jacobson, S.R.; Lee, C.Y. (Chevron Oil Field Research Co., Richmond, CA (USA)); Huizinga, B.J. (Chevron Overseas Petroleum, Inc., San Ramon, CA (USA))

    1990-05-01T23:59:59.000Z

    Determination of age constraints on petroleums from unknown sources provides a means of choosing among possible source rock candidates, predicting migration scenarios for oil, and determining the timing of its emplacement in the reservoir. A number of parameters used to assign such age constraints to petroleum have been suggested by geochemists. However, any constraining marker, regardless of age, may not be found in a particular facies because the parent organisms are absent in those sediments. Thus, the presence of a specific age correlation marker may be significant whereas its absence may not. The authors have investigated two markers for their age-correlation significance. Oleanane, a marker related to pentacyclic triterpanes in flowering plants (angiosperms) occurs in many Late Cretaceous or younger rocks and oils, even though angiosperm fossils are known in older rocks. A survey of a sequence of middle to upper Cretaceous rocks from Wyoming provides an example of a Late Cretaceous age for the onset of oleanane. However, a level of uncertainty exists for older Cretaceous rocks where a trace component with many similarities to oleanane (which could in fact be oleanane) can occur. C{sub 30}-steranes (24-n-propylcholestanes) have been used as a widely occurring marker for marine organic input to petroleum. A recent report postulates the origin of C{sub 30}-steranes from marine Sarcinochrysidales order of Chrysophycase (golden brown algae). Although the fossil record of these algae has not been recorded, their sample base indicates that C{sub 30} steranes, and therefore their parent organisms, originate in the Middle Ordovician.

  13. Research is needed to assess the unique nutrition and wellness needs of aging Californians

    E-Print Network [OSTI]

    Blackburn, Mary L.; Gillogly, Barbara; Hauselt, Peggy

    2010-01-01T23:59:59.000Z

    the development of osteoporosis. Aging and nutrient intakeschronic diseases such as osteoporosis (Wallace 2005). Ma rinanemia, and calcium and osteoporosis; but the role of aging

  14. Aging Aircraft NDI Development and Demonstration Center (AANC): An overview

    SciTech Connect (OSTI)

    Walter, P.L.

    1991-01-01T23:59:59.000Z

    A major center with emphasis on validation of nondestructive inspection techniques for aging aircraft, the Aging Aircraft NDI Development and Demonstration Center (AANC), has been funded by the FAA at Sandia National Laboratories. The Center has been assigned specific tasks in developing techniques for the nondestructive inspection of static engine parts, assessing inspection reliability (POD experiments), developing test beds for nondestructive inspection validation, maintaining a FAA library of characterized aircraft structural test specimens, and leasing a hangar to house a high flight cycle transport aircraft for use as a full scale test bed. 3 refs.

  15. Aging of concrete structures in nuclear power plants

    SciTech Connect (OSTI)

    Naus, D.J.; Pland, C.B. (Oak Ridge National Lab., TN (USA)); Arndt, E.G. (Nuclear Regulatory Commission, Washington, DC (USA))

    1991-01-01T23:59:59.000Z

    The Structural Aging (SAG) Program, sponsored by the US Nuclear Regulatory Commission (USNRC) and conducted by the Oak Ridge National Laboratory (ORNL), had the overall objective of providing the USNRC with an improved basis for evaluating nuclear power plant structures for continued service. The program consists of three technical tasks: materials property data base, structural component assessment/repair technology, and quantitative methodology for continued service determinations. Major accomplishments under the SAG Program during the first two years of its planned five-year duration have included: development of a Structural Materials Information Center and formulation of a Structural Aging Assessment Methodology for Concrete Structures in Nuclear Power Plants. 9 refs.

  16. Determination of age in forensic dentistry from cemental incremental lines

    E-Print Network [OSTI]

    Sousa, Eliane Marques Duarte de

    1987-01-01T23:59:59.000Z

    DETERMINATION OF AGE IN FORENSIC DENTISTRY FROM CEMENTAL INCREMENTAL LINES Thes' s by ELIANE MARJUES DLARTE DF SOUSA Submitted to the Graduate College of Texas A?M Univer ity ' n r. srt' al f"lf' llment of the requirements for the degree... of MASTEP OF S IENCE December 1987 Major Subject: Veterinary Anatomy DETERMINATION OF AGE IN FORENSIC DENTISTRy FROM CEMENTAL INCREMENTAL LINES A Thesis by ELIANE MARQUES DUARTE DE SOUSA Approved as to style and content by: eorge G. Stott (Chairman...

  17. Tenderness, flavor, and yield assessments of dry-aged beef

    E-Print Network [OSTI]

    Laster, Megan Ann

    2009-05-15T23:59:59.000Z

    , vacuum packaged, and imediately frozen. These steaks served as the baseline for tendernes and flavor asesments. The remaining subprimals (n=288) (6 replications x 2 grade groups x 3 subprimals x 4 aging periods x 2 aging treatments) were randomly 7... and reweighed (out of bag weight). In order for a purge loss value to be calculated, vacuum package bags then were washed, dried, and weighed. Using the band saw, ribeye rolls were cut into 2.54 cm-thick Bef Ribeye Steaks Lip-On BI (U.P.C. #1197) (refered...

  18. Space-Age Ceramics Get Their Toughest Test

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our Instagram Secretary Moniz9MorganYouofSolvingexplore2 Space andSpace-AgeSpace-Age

  19. Space-Age Ceramics Get Their Toughest Test

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol HomeFacebookScholarship Fund3Biology|Solar windMarchSpace-Age CeramicsSpace-Age

  20. Identification and Assessment of Material Models for Age-Related Degradation of Structures and Passive Components in Nuclear Power Plants

    SciTech Connect (OSTI)

    Nie,J.; Braverman, J.; Hofmayer, C.; Kim, M. K.; Choi, I-K.

    2009-04-27T23:59:59.000Z

    When performing seismic safety assessments of nuclear power plants (NPPs), the potential effects of age-related degradation on structures, systems, and components (SSCs) should be considered. To address the issue of aging degradation, the Korea Atomic Energy Research Institute (KAERI) has embarked on a five-year research project to develop a realistic seismic risk evaluation system which will include the consideration of aging of structures and components in NPPs. Three specific areas that are included in the KAERI research project, related to seismic probabilistic risk assessment (PRA), are probabilistic seismic hazard analysis, seismic fragility analysis including the effects of aging, and a plant seismic risk analysis. To support the development of seismic capability evaluation technology for degraded structures and components, KAERI entered into a collaboration agreement with Brookhaven National Laboratory (BNL) in 2007. The collaborative research effort is intended to continue over a five year period with the goal of developing seismic fragility analysis methods that consider the potential effects of age-related degradation of SSCs, and using these results as input to seismic PRAs. In the Year 1 scope of work BNL collected and reviewed degradation occurrences in US NPPs and identified important aging characteristics needed for the seismic capability evaluations that will be performed in the subsequent evaluations in the years that follow. This information is presented in the Annual Report for the Year 1 Task, identified as BNL Report-81741-2008 and also designated as KAERI/RR-2931/2008. The report presents results of the statistical and trending analysis of this data and compares the results to prior aging studies. In addition, the report provides a description of U.S. current regulatory requirements, regulatory guidance documents, generic communications, industry standards and guidance, and past research related to aging degradation of SSCs. This report describes the research effort performed by BNL for the Year 2 scope of work. This research focused on methods that could be used to represent the long-term behavior of materials used at NPPs. To achieve this BNL reviewed time-dependent models which can approximate the degradation effects of the key materials used in the construction of structures and passive components determined to be of interest in the Year 1 effort. The intent was to review the degradation models that would cover the most common time-dependent changes in material properties for concrete and steel components.

  1. Resonances, Unstable Systems and Irreversibility: Matter Meets Mind

    E-Print Network [OSTI]

    Robert C. Bishop

    2005-06-22T23:59:59.000Z

    The fundamental time-reversal invariance of dynamical systems can be broken in various ways. One way is based on the presence of resonances and their interactions giving rise to unstable dynamical systems, leading to well-defined time arrows. Associated with these time arrows are semigroups bearing time orientations. Usually, when time symmetry is broken, two time-oriented semigroups result, one directed toward the future and one directed toward the past. If time-reversed states and evolutions are excluded due to resonances, then the status of these states and their associated backwards-in-time oriented semigroups is open to question. One possible role for these latter states and semigroups is as an abstract representation of mental systems as opposed to material systems. The beginnings of this interpretation will be sketched.

  2. Women in management: gender, age and working lives

    E-Print Network [OSTI]

    Jyrkinen, Marjut; McKie, Linda

    The project reported in this briefing paper explored how age and gender inter-weave and impact on the working and home lives of women managers working in two EU member states, namely Finland and Scotland. The proportion of women in middle...

  3. Aging of Alloy 617 at 650 and 750 Degrees C

    SciTech Connect (OSTI)

    Julian Benz; Thomas Lillo; Richard Wright

    2013-01-01T23:59:59.000Z

    Alloy 617 has been selected as the primary candidate for heat exchanger applications in advanced reactors. For the VHTR this application could require extended service up to a reactor outlet temperature of 950C. A key hurdle to using this alloy in the VHTR heat exchanger application is qualifying the alloy for Section III of the ASME Boiler and Pressure Vessel Code. In order to Code qualify the material it is necessary to characterize the influence of long term aging on the mechanical behavior. Alloy 617 has been aged at 650 and 750C for times up to 5300 hours. The microstructure after aging has been characterized using optical and transmission electron microscopies. It has been determined that in addition to carbides, a significant volume fraction of ? phase (Ni3Al) is formed at these temperatures. The ? does not contribute significantly to changing the tensile or impact properties of the aged material. It does, however, appear to increase creep resistance and impede creep crack growth.

  4. age toolmaking technology: Topics by E-print Network

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

    age toolmaking technology First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Privacy, Technology, and...

  5. Bitcoin and The Age of Bespoke Silicon Michael Bedford Taylor

    E-Print Network [OSTI]

    Wang, Deli

    Bitcoin and The Age of Bespoke Silicon Michael Bedford Taylor University of California, San Diego ABSTRACT Recently, the Bitcoin cryptocurrency has been an interna- tional sensation. This paper tells the story of Bitcoin hard- ware: how a group of early-adopters self-organized and fi- nanced the creation

  6. Social relationships, sleep quality, and interleukin-6 in aging women

    E-Print Network [OSTI]

    Patel, Aniruddh D.

    focus on sleep quality and its interactions with social engagement in predicting reduced plasma IL-6 of social engagement, sleep quality, and plasma levels of interleukin-6 (IL-6) in a sample of aging women (n samples were obtained for analysis of plasma levels of IL-6. Regarding subjective assessment, poorer sleep

  7. Original article Age-related changes in apparent digestibility

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Original article Age-related changes in apparent digestibility in growing kittens E. Jean HARPER kitten to digest protein, fat, carbohydrate, dry-matter and energy were assessed. Kittens were divided access to food. Apparent digestibility of the two diets, and kitten bodyweights were measured over a 24

  8. aging test results: Topics by E-print Network

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

    test results First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Testing intermediate-age stellar evolution...

  9. accelerated aging test: Topics by E-print Network

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

    accelerated aging test First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Powerline Conductor Accelerated...

  10. accelerated ageing test: Topics by E-print Network

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

    ageing test First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Powerline Conductor Accelerated Testing...

  11. Age of Neoproterozoic Bilatarian Body and Trace Fossils, White

    E-Print Network [OSTI]

    J. L. Kirschvink3 A uranium-lead zircon age for a volcanic ash interstratified with fossil seawater. The terminal Neoproterozoic interval is char- acterized by a period of supercontinent amal- gamation and dispersal (1, 2), low-latitude glaciations (3, 4), chemical perturbations of seawater (5

  12. Age-validation of a leopard shark (Triakis semifasciata)

    E-Print Network [OSTI]

    with oxytetracycline hydrochloride (OTC), tagged on the dorsal fin with yellow plastic livestock rototags, and released194 Age-validation of a leopard shark (Triakis semifasciata) recaptured after 20 years Susan E sharks were from a group of 948 leopard sharks tagged and released off Hunters Point (3744N lat., 122

  13. absorber materials aging: Topics by E-print Network

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

    absorber materials aging First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Characterization of porous...

  14. Age-Related Changes in Task Related Functional Network Connectivity

    E-Print Network [OSTI]

    the information load [2,3,4], retention interval [5,6] and response time duration [7,8]. Results from fMRI studies-serving these processes have been elucidated with experimental manipulations that vary task demands by altering with these alterations in task demands [9]. Advancing age is associated with decreased performance on verbal working

  15. argentina age stratigraphic: Topics by E-print Network

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

    argentina age stratigraphic First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Contribution of GIS and...

  16. EARLY-AGE CRACKING REVIEW: MECHANISMS, MATERIAL PROPERTIES,

    E-Print Network [OSTI]

    Bentz, Dale P.

    ://cementbarriers.org/ and Savannah River National Laboratory website: http://srnl.doe.gov #12;Early-Age Cracking Review: Mechanisms Commission (NRC), the National Institute of Standards and Technology (NIST), the Savannah River National of work performed in part under that contract. This report was prepared in support of the Savannah River

  17. Anoxygenic photosynthesis modulated Proterozoic oxygen and sustained Earth's middle age

    E-Print Network [OSTI]

    Macalady, Jenn

    Anoxygenic photosynthesis modulated Proterozoic oxygen and sustained Earth's middle age D. T photosynthesis to overall primary production would have influ- enced oceanic redox and the Proterozoic O2 budget time in Earth's history, complete dominance of oxygenic photosynthesis in the oceans. This paved

  18. Desorption Kinetics for Field-Aged Polycyclic Aromatic Hydrocarbons

    E-Print Network [OSTI]

    Rockne, Karl J.

    Harbor Estuary. Desorption kinetics for PAHs with a log octanol- water partition coefficient greater than This study considers desorption kinetics for 12 field-aged polycyclic aromatic hydrocarbons (PAHs) desorbing 6 were well- described by a one-domain diffusion model that assumes that PAHs are initially

  19. Reviving the Free Public Scientific Library in the Digital Age?

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Reviving the Free Public Scientific Library in the Digital Age? The EuDML project Thierry Bouche for- ward has been achieved during the course of the European Digital Math- ematics Library (Eu during the course of the European Digital Mathematics Library (EuDML) project which got initial funding

  20. Reviving the Free Public Scientific Library in the Digital Age?

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Reviving the Free Public Scientific Library in the Digital Age? The EuDML project Thierry Bouche- ward has been achieved during the course of the European Digital Math- ematics Library (EuDML) project during the course of the European Digital Mathematics Library (EuDML) project which got initial funding

  1. Retail Shelf-life Characteristics of Dry-aged Beef

    E-Print Network [OSTI]

    Ulbrich, Carson

    2010-07-14T23:59:59.000Z

    counts, lactic acid bacteria, and yeast and mold counts. Surface discoloration (P = 0.007) and fat discoloration (P < 0.0001) of steaks increased as aging period and retail steak shelf-life day increased. Also, off-odor development increased (P < 0...

  2. The Age-Redshift Relation for Standard Cosmology

    E-Print Network [OSTI]

    R. C. Thomas; R. Kantowski

    2000-08-10T23:59:59.000Z

    We present compact, analytic expressions for the age-redshift relation $\\tau(z)$ for standard Friedmann-Lema\\^ \\itre-Robertson-Walker (FLRW) cosmology. The new expressions are given in terms of incomplete Legendre elliptic integrals and evaluate much faster than by direct numerical integration.

  3. PAGE I OF __ pAGES STANDARD ~M 135

    E-Print Network [OSTI]

    Rathbun, Julie A.

    th concurrence of MSC Records Management Technicia~ -- - -- 2. SQUARE FEET OF SPACE CLEARED 3. Fl. (Signature) - - 10, TITLE 11. DATE' Records Management Technici~n 7/23/70 12. BOX NUMBERS FRC ONLYPAGE I OF __ pAGES STANDARD ~M 135 RECORbJ TRANSMITTAL TO BE COMPI , AT FEDERAL RECORDS CENTER JULY

  4. aging mouse brain: Topics by E-print Network

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

    aging mouse brain First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Construction of Anatomically Correct...

  5. aging brain relevance: Topics by E-print Network

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

    aging brain relevance First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Brain Evolution Relevant to P....

  6. aged human brain: Topics by E-print Network

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

    aged human brain First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Chemical Heterogeneity of the Living...

  7. ageing human brain: Topics by E-print Network

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

    ageing human brain First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Chemical Heterogeneity of the Living...

  8. All Quebec Retired Employees age 65 and over

    E-Print Network [OSTI]

    be kept in a safe place known to you and your family. The Plan is underwritten by #12;Protecting Your; as well as life, disability and critical illness insurance for individuals and families. As a leadingAll Quebec Retired Employees age 65 and over #12;Great-West Life is a leading Canadian life

  9. Correlations of Structure and Dynamics in an Aging Colloidal Glass

    E-Print Network [OSTI]

    Weeks, Eric R.

    Correlations of Structure and Dynamics in an Aging Colloidal Glass Gianguido C. Cianci, Rachel E an initial state. We study the relationship between the static structure and the slowing dynamics, using these phenomena try to link the microscopic structure to the microscopic dynamics. For example, one might

  10. The end of the age of oil David Goodstein

    E-Print Network [OSTI]

    Bertini, Robert L.

    (99 Quads) #12;Fossil Fuels Oil Natural gas Shale oil Methane hydrate Coal #12;Coal Hundreds, maybeOut of Gas The end of the age of oil David Goodstein Portland State University November 14, 2008 #12;Energy Myths $4.00 a gallon is too much to pay for gasoline Oil companies produce oil. We must

  11. Methodology for the Incorporation of Passive Component Aging Modeling into the RAVEN/ RELAP-7 Environment

    SciTech Connect (OSTI)

    Mandelli, Diego; Rabiti, Cristian; Cogliati, Joshua; Alfonsi, Andrea; Askin Guler; Tunc Aldemir

    2014-11-01T23:59:59.000Z

    Passive system, structure and components (SSCs) will degrade over their operation life and this degradation may cause to reduction in the safety margins of a nuclear power plant. In traditional probabilistic risk assessment (PRA) using the event-tree/fault-tree methodology, passive SSC failure rates are generally based on generic plant failure data and the true state of a specific plant is not reflected realistically. To address aging effects of passive SSCs in the traditional PRA methodology [1] does consider physics based models that account for the operating conditions in the plant, however, [1] does not include effects of surveillance/inspection. This paper represents an overall methodology for the incorporation of aging modeling of passive components into the RAVEN/RELAP-7 environment which provides a framework for performing dynamic PRA. Dynamic PRA allows consideration of both epistemic and aleatory uncertainties (including those associated with maintenance activities) in a consistent phenomenological and probabilistic framework and is often needed when there is complex process/hardware/software/firmware/ human interaction [2]. Dynamic PRA has gained attention recently due to difficulties in the traditional PRA modeling of aging effects of passive components using physics based models and also in the modeling of digital instrumentation and control systems. RAVEN (Reactor Analysis and Virtual control Environment) [3] is a software package under development at the Idaho National Laboratory (INL) as an online control logic driver and post-processing tool. It is coupled to the plant transient code RELAP-7 (Reactor Excursion and Leak Analysis Program) also currently under development at INL [3], as well as RELAP 5 [4]. The overall methodology aims to: Address multiple aging mechanisms involving large number of components in a computational feasible manner where sequencing of events is conditioned on the physical conditions predicted in a simulation environment such as RELAP-7. Identify the risk-significant passive components, their failure modes and anticipated rates of degradation Incorporate surveillance and maintenance activities and their effects into the plant state and into component aging progress. Asses aging affects in a dynamic simulation environment 1. C. L. SMITH, V. N. SHAH, T. KAO, G. APOSTOLAKIS, Incorporating Ageing Effects into Probabilistic Risk Assessment A Feasibility Study Utilizing Reliability Physics Models, NUREG/CR-5632, USNRC, (2001). 2. T. ALDEMIR, A Survey of Dynamic Methodologies for Probabilistic Safety Assessment of Nuclear Power Plants, Annals of Nuclear Energy, 52, 113-124, (2013). 3. C. RABITI, A. ALFONSI, J. COGLIATI, D. MANDELLI and R. KINOSHITA Reactor Analysis and Virtual Control Environment (RAVEN) FY12 Report, INL/EXT-12-27351, (2012). 4. D. ANDERS et.al, "RELAP-7 Level 2 Milestone Report: Demonstration of a Steady State Single Phase PWR Simulation with RELAP-7," INL/EXT-12-25924, (2012).

  12. Neural Effects of Beta Amyloid in Normal Aging

    E-Print Network [OSTI]

    Mormino, Elizabeth Charlotte

    2011-01-01T23:59:59.000Z

    was performed using a Siemens ECAT EXACT HR PET Magnetom Avanto System (Siemens Inc. , Iselin, NJ) 1.5T Vision System (Siemens Inc. , Iselin, NJ) with

  13. aged 80 and over: Topics by E-print Network

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

    systems. For example, the triggering system of the Cathode Strip Chamber (CSC) sub-detector at the CMS experiment comprises the onchamber anode and cathode electronics, the...

  14. absolute age determination: Topics by E-print Network

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

    advance Machian physics by maintaining that the heliocentric system must be replaced by Tycho Brahe's geocentric system. We show that while geocentrism relies on Mach's contention...

  15. Mesenchymal progenitor self-renewal deficiency leads to age-dependent osteoporosis in

    E-Print Network [OSTI]

    Waldman, Stephen D.

    Mesenchymal progenitor self-renewal deficiency leads to age-dependent osteoporosis in Sca-1 Ly-6A) The cellular and molecular mechanisms that underlie age-dependent osteoporosis, the most common disease uncharacterized mechanism of age-dependent osteoporosis in humans. Osteoporosis is a multifactorial, age

  16. ENGINEERED BARRIER SYSTEM FEATURES, EVENTS AND PROCESSES

    SciTech Connect (OSTI)

    Jaros, W.

    2005-08-30T23:59:59.000Z

    The purpose of this report is to evaluate and document the inclusion or exclusion of engineered barrier system (EBS) features, events, and processes (FEPs) with respect to models and analyses used to support the total system performance assessment for the license application (TSPA-LA). A screening decision, either Included or Excluded, is given for each FEP along with the technical basis for exclusion screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.114 (d, e, and f) [DIRS 173273]. The FEPs addressed in this report deal with those features, events, and processes relevant to the EBS focusing mainly on those components and conditions exterior to the waste package and within the rock mass surrounding emplacement drifts. The components of the EBS are the drip shield, waste package, waste form, cladding, emplacement pallet, emplacement drift excavated opening (also referred to as drift opening in this report), and invert. FEPs specific to the waste package, cladding, and drip shield are addressed in separate FEP reports: for example, ''Screening of Features, Events, and Processes in Drip Shield and Waste Package Degradation'' (BSC 2005 [DIRS 174995]), ''Clad Degradation--FEPs Screening Arguments (BSC 2004 [DIRS 170019]), and Waste-Form Features, Events, and Processes'' (BSC 2004 [DIRS 170020]). For included FEPs, this report summarizes the implementation of the FEP in the TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded). This report also documents changes to the EBS FEPs list that have occurred since the previous versions of this report. These changes have resulted due to a reevaluation of the FEPs for TSPA-LA as identified in Section 1.2 of this report and described in more detail in Section 6.1.1. This revision addresses updates in Yucca Mountain Project (YMP) administrative procedures as they pertain to this report; the current procedures are addressed in Section 2. This revision also addresses updates to the technical basis in supporting analysis and model reports and corroborative documentation, as presented in Sections 4 and 6 of this report. Finally, Sections 4, 5, and 6 of this report provide additional information pertaining to the relevant FEPs-related Acceptance Criteria presented in ''Yucca Mountain Review Plan, Final Report'' (YMRP) (NRC 2003 [DIRS 163274], Sections 2.2.1.2.1.3 and 2.2.1.3.3.3).

  17. AGING PERFORMANCE OF MODEL 9975 PACKAGE FLUOROELASTOMER O-RINGS

    SciTech Connect (OSTI)

    Hoffman, E.; Daugherty, W.; Skidmore, E.; Dunn, K.; Fisher, D.

    2011-05-31T23:59:59.000Z

    The influence of temperature and radiation on Viton{reg_sign} GLT and GLT-S fluoroelastomer O-rings is an ongoing research focus at the Savannah River National Laboratory. The O-rings are credited for leaktight containment in the Model 9975 shipping package used for transportation of plutonium-bearing materials. At the Savannah River Site, the Model 9975 packages are being used for interim storage. Primary research efforts have focused on surveillance of O-rings from actual packages, leak testing of seals at bounding aging conditions and the effect of aging temperature on compression stress relaxation behavior, with the goal of service life prediction for long-term storage conditions. Recently, an additional effort to evaluate the effect of aging temperature on the oxidation of the materials has begun. Degradation in the mechanical properties of elastomers is directly related to the oxidation of the polymer. Sensitive measurements of the oxidation rate can be performed in a more timely manner than waiting for a measurable change in mechanical properties, especially at service temperatures. Measuring the oxidation rate therefore provides a means to validate the assumption that the degradation mechanisms(s) do not change from the elevated temperatures used for accelerated aging and the lower service temperatures. Monitoring the amount of oxygen uptake by the material over time at various temperatures can provide increased confidence in lifetime predictions. Preliminary oxygen consumption analysis of a Viton GLT-based fluoroelastomer compound (Parker V0835-75) using an Oxzilla II differential oxygen analyzer in the temperature range of 40-120 C was performed. Early data suggests oxygen consumption rates may level off within the first 100,000 hours (10-12 years) at 40 C and that sharp changes in the degradation mechanism (stress-relaxation) are not expected over the temperature range examined. This is consistent with the known long-term heat aging resistance of fluoroelastomers relative to hydrocarbon-based elastomers, and in absence of antioxidants that may be consumed over time. Additional experimental effort will be undertaken in the short term range within the first 100 hours of thermal aging to capture further details of the oxygen consumption rate.

  18. Individual Module Maximum Power Point Tracking for Thermoelectric Generator Systems

    E-Print Network [OSTI]

    Schaltz, Erik

    of Thermo Electric Generator (TEG) systems a power converter is often inserted between the TEG system that the TEG system produces the maximum power. However, if the conditions, e.g. temperature, health, age, etc find the best compromise of all modules. In order to increase the power production of the TEG system

  19. The effect of aging techniques on asphalt low-temperature properties

    E-Print Network [OSTI]

    Knorr, Daniel Brainard

    2001-01-01T23:59:59.000Z

    . . . . . . . . . 62 m-Value as a Function of Aging Time for AAF-I Stiffness as a Function of Aging Time for AAF-I . . . . 63 . . . . 63 xu FIGURE III-22 H1-23 m-Value as a Function of Aging Time for Exxon AC-20 . . . . . Stiffness as a Function of Aging Time... for Exxon AC-20 . . . . . Page . . . . 64 Comparison of m-Value Grade and S Grade for Materials at Various Aging Times. . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 III-25 Comparison of m...

  20. Cumulative theoretical uncertainties in lithium depletion boundary age

    E-Print Network [OSTI]

    Tognelli, Emanuele; Degl'Innocenti, Scilla

    2015-01-01T23:59:59.000Z

    We performed a detailed analysis of the main theoretical uncertainties affecting the age at the lithium depletion boundary (LDB). To do that we computed almost 12000 pre-main sequence models with mass in the range [0.06, 0.4] M_sun by varying input physics (nuclear reaction cross-sections, plasma electron screening, outer boundary conditions, equation of state, and radiative opacity), initial chemical elements abundances (total metallicity, helium and deuterium abundances, and heavy elements mixture), and convection efficiency (mixing length parameter, alpha_ML). As a first step, we studied the effect of varying these quantities individually within their extreme values. Then, we analysed the impact of simultaneously perturbing the main input/parameters without an a priori assumption of independence. Such an approach allowed us to build for the first time the cumulative error stripe, which defines the edges of the maximum uncertainty region in the theoretical LDB age. We found that the cumulative error stripe ...

  1. The Age and Interior Rotation of Stars from Asteroseismology

    E-Print Network [OSTI]

    Aerts, Conny

    2015-01-01T23:59:59.000Z

    We provide a status report on the determination of stellar ages from asteroseismology for stars of various masses and evolutionary stages. The ability to deduce the ages of stars with a relative precision of typically 10 to 20% is a unique opportunity for stellar evolution and also of great value for both galactic and exoplanet studies. Further, a major uncalibrated ingredient that makes stellar evolution models uncertain, is the stellar interior rotation frequency $\\Omega(r)$ and its evolution during stellar life. We summarize the recent achievements in the derivation of $\\Omega(r)$ for different types stars, offering stringent observational constraints on theoretical models. Core-to-envelope rotation rates during the red giant stage are far lower than theoretical predictions, pointing towards the need to include new physical ingredients that allow strong and efficient coupling between the core and the envelope in the models of low-mass stars in the evolutionary phase prior to the core helium burning. Stars ...

  2. Management of aging of nuclear power plant containment structures

    SciTech Connect (OSTI)

    Naus, D.; Oland, C.B. [Oak Ridge National Lab., TN (United States). Engineering Technology Div.; Ellingwood, B. [Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Civil Engineering; Norris, W.E.; Graves, H.L. III [Nuclear Regulatory Commission, Washington, DC (United States). Office of Nuclear Regulatory Research

    1998-06-01T23:59:59.000Z

    Research addressing aging management of nuclear power plant concrete and steel containment structures is summarized. Accomplishments related to concrete containment structures include formation of a materials` property database; an aging assessment methodology to identify critical structures and degradation factors; guidelines and evaluation criteria for use in condition assessments; and a time-dependent reliability-based methodology for condition assessments and estimations of future performance. Under the steel containments and liners activity, a degradation assessment methodology has been developed, mathematical models that describe time-dependent changes in the containment due to aggressive environmental factors have been identified, and statistical data supporting the use of these models in time-dependent reliability analysis have been summarized.

  3. Maximum Entry and Mandatory Separation Ages for Certain Security Employees

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

    2001-10-11T23:59:59.000Z

    The policy establishes the DOE policy on maximum entry and mandatory separation ages for primary or secondary positions covered under special statutory retirement provisions and for those employees whose primary duties are the protection of officials of the United States against threats to personal safety or the investigation, apprehension, and detention of individuals suspected or convicted of offenses against the criminal laws of the United States. Admin Chg 1, dated 12-1-11, cancels DOE P 310.1.

  4. Materials Compatibility and Aging for Flux and Cleaner Combinations.

    SciTech Connect (OSTI)

    Archuleta, Kim; Piatt, Rochelle

    2015-01-01T23:59:59.000Z

    A materials study of high reliability electronics cleaning is presented here. In Phase 1, mixed type substrates underwent a condensed contaminants application to view a worst- case scenario for unremoved flux with cleaning agent residue for parts in a silicone oil filled environment. In Phase 2, fluxes applied to copper coupons and to printed wiring boards underwent gentle cleaning then accelerated aging in air at 65% humidity and 30 O C. Both sets were aged for 4 weeks. Contaminants were no-clean (ORL0), water soluble (ORH1 liquid and ORH0 paste), and rosin (RMA; ROL0) fluxes. Defluxing agents were water, solvents, and engineered aqueous defluxers. In the first phase, coupons had flux applied and heated, then were placed in vials of oil with a small amount of cleaning agent and additional coupons. In the second phase, pairs of copper coupons and PWB were hand soldered by application of each flux, using tin-lead solder in a strip across the coupon or a set of test components on the PWB. One of each pair was cleaned in each cleaning agent, the first with a typical clean, and the second with a brief clean. Ionic contamination residue was measured before accelerated aging. After aging, substrates were removed and a visual record of coupon damage made, from which a subjective rank was applied for comparison between the various flux and defluxer combinations; more corrosion equated to higher rank. The ORH1 water soluble flux resulted in the highest ranking in both phases, the RMA flux the least. For the first phase, in which flux and defluxer remained on coupons, the aqueous defluxers led to worse corrosion. The vapor phase cleaning agents resulted in the highest ranking in the second phase, in which there was no physical cleaning. Further study of cleaning and rinsing parameters will be required.

  5. Understanding the genetics of aging: a canine model

    E-Print Network [OSTI]

    Canterberry, Sarah Christine

    2007-04-25T23:59:59.000Z

    : Dr. Keith E. Murphy As life expectancy in the United States increases each year, the percentage of the population that is comprised of aged individuals rises also. Researchers expect the largest increase in population to occur... ACKNOWLEDGEMENTS I would like to thank Dr. Keith Murphy, my advisor, for his investment of time and effort into my graduate career. I would like to thank the membfers of my committee, for providing me with invaluabfle advice, Dr. Ann Kier, Dr...

  6. Report on aging of nuclear power plant reinforced concrete structures

    SciTech Connect (OSTI)

    Naus, D.J.; Oland, C.B. [Oak Ridge National Lab., TN (United States); Ellingwood, B.R. [Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Civil Engineering

    1996-03-01T23:59:59.000Z

    The Structural Aging Program provides the US Nuclear Regulatory Commission with potential structural safety issues and acceptance criteria for use in continued service assessments of nuclear power plant safety-related concrete structures. The program was organized under four task areas: Program Management, Materials Property Data Base, Structural Component Assessment/Repair Technology, and Quantitative Methodology for Continued Service Determinations. Under these tasks, over 90 papers and reports were prepared addressing pertinent aspects associated with aging management of nuclear power plant reinforced concrete structures. Contained in this report is a summary of program results in the form of information related to longevity of nuclear power plant reinforced concrete structures, a Structural Materials Information Center presenting data and information on the time variation of concrete materials under the influence of environmental stressors and aging factors, in-service inspection and condition assessments techniques, repair materials and methods, evaluation of nuclear power plant reinforced concrete structures, and a reliability-based methodology for current and future condition assessments. Recommendations for future activities are also provided. 308 refs., 61 figs., 50 tabs.

  7. 2012 ACCOMPLISHMENTS - TRITIUM AGING STUDIES ON STAINLESS STEELS

    SciTech Connect (OSTI)

    Morgan, M.

    2013-01-31T23:59:59.000Z

    This report summarizes the research and development accomplishments during FY12 for the tritium effects on materials program. The tritium effects on materials program is designed to measure the long-term effects of tritium and its radioactive decay product, helium-3, on the structural properties of forged stainless steels which are used as the materials of construction for tritium reservoirs. The FY12 R&D accomplishments include: (1) Fabricated and Thermally-Charged 150 Forged Stainless Steel Samples with Tritium for Future Aging Studies; (2) Developed an Experimental Plan for Measuring Cracking Thresholds of Tritium-Charged-and-Aged Steels in High Pressure Hydrogen Gas; (3) Calculated Sample Tritium Contents For Laboratory Inventory Requirements and Environmental Release Estimates; (4) Published report on Cracking Thresholds and Fracture Toughness Properties of Tritium-Charged-and-Aged Stainless Steels; and, (5) Published report on The Effects of Hydrogen, Tritium, and Heat Treatment on the Deformation and Fracture Toughness Properties of Stainless Steels. These accomplishments are highlighted here and references given to additional reports for more detailed information.

  8. Aging and iodine loading of silver-functionalized aerogels

    SciTech Connect (OSTI)

    Bruffey, S.H.; Jubin, R.T.; Anderson, K.K.; Walker, J.F. [Oak Ridge National Laboratory, P.O. Box 2008, MS-6223, Oak Ridge, TN 37831 (United States)

    2013-07-01T23:59:59.000Z

    Engineered silver-functionalized silica aerogels are being investigated for their potential application in off-gas treatment at a used nuclear fuel reprocessing facility. Reprocessing will release several key volatile radionuclides, including iodine-129. To achieve regulatory compliance, iodine-129 must be removed from any off-gas stream prior to environmental discharge. Ag{sup 0}-functionalized aerogels have been demonstrated to have high iodine-capture capacity, high porosity, and potential for conversion into a waste form. Capture materials used in off-gas treatment may be exposed to a heated, high-humidity, acidic gas stream for months. Extended exposure to this stream could affect sorbent performance. It was the aim of this study to evaluate what impacts might be observed when Ag{sup 0}-functionalized aerogels prepared at Pacific Northwest National Laboratory were contacted with a dry air stream for up to 6 months and then used to adsorb iodine from a synthetic off-gas stream. Results demonstrate that there is some loss of iodine-capture capacity caused by aging, but that this loss is not as marked as for aging of more traditional iodine sorbents, such as silver-impregnated mordenite. Specifically, aging silver-functionalized aerogel under a dry air stream for up to 6 months can decrease its iodine capacity from 41 wt% to 32 wt%. (authors)

  9. AGING AND IODINE LOADING OF SILVER-FUNCTIONALIZED AEROGELS

    SciTech Connect (OSTI)

    Bruffey, Stephanie H [ORNL; Jubin, Robert Thomas [ORNL; Anderson, Kaara K [ORNL; Walker Jr, Joseph Franklin [ORNL

    2013-01-01T23:59:59.000Z

    Engineered silver-functionalized silica aerogels are being investigated for their application in off-gas treatment at a used nuclear fuel reprocessing facility. Reprocessing will release several key volatile radionuclides, including iodine-129. To achieve regulatory compliance, iodine-129 must be removed from any off-gas stream prior to environmental discharge. Silver-functionalized aerogels have been demonstrated to have high iodine capture capacity, high porosity and potential for conversion into a waste form. Capture materials used in off-gas treatment may be exposed to a heated, high humidity, acidic gas stream for months. Extended exposure to this stream could affect sorbent performance. It was the aim of this study to evaluate what impacts might be observed when Ag0-functionalized aerogels prepared at Pacific Northwest National Laboratory were contacted with a dry air stream for up to 6 months and then used to adsorb iodine from a synthetic off-gas stream. Results demonstrate that there is some loss of iodine capture capacity caused by aging, but that this loss is not as marked as for aging of more traditional iodine sorbents, such as silver-impregnated mordenite. Specifically, aging silver-functionalized aerogel under a dry air stream for up to 6 months can decrease its iodine capacity from 41wt% to 32wt%.

  10. PBX 9404 detonation copper cylinder tests: a comparison of new and aged material

    SciTech Connect (OSTI)

    Hill, Larry G [Los Alamos National Laboratory; Mier, Robert [Los Alamos National Laboratory; Briggs, Matthew E [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    We present detonation copper cylinder test results on aged PBX 9404 (94 wt% HMX, 3 wt% CEF, 2.9 wt% NC, 0.1 wt% DPA) explosive. The charges were newly pressed from 37.5 year-old molding powder. We compare these results to equivalent data performed on the same lot when it was 3.5 years old. Comparison of the detonation energy inferred from detonation speed to that inferred from wall motion suggests that the HMX energy is unchanged but the NC energy has decreased to {approx}25% of its original value. The degradation of explosives and their binders is a subject of continual interest. Secondary explosives such as HMX are sufficiently stable near room temperature that they do not measurably degrade over a period of at least several decades. For formulated systems the bigger concern is binder degradation, for which the three main issues are strength, initiation safety, and (if the binder is energetic) energy content. In this paper we examine the detonation energy of new and aged PBX 9404 (94 wt% HMX, 3 wt% tris-{beta} chloroethylphosphate (CEF), 2.9 wt% nitrocellulose (NC), 0.1 wt% diphenylamine (DPA) [1, 2]), measured via the detonation copper cylinder test. In 1959, two independent PBX 9404 accidents [3] raised serious concerns about the safety of the formulation. Over about a decade's time, Los Alamos pursued a safer, energetically equivalent replacement, which ultimately became PBX 9501. In order to accurately compare the performance of the PBX 9404 and PBX 9501 formulations, W. Campbell and R. Engelke (C & E) developed a stringent cylinder test protocol that they called the Los Alamos Precision Cylinder Test [4]. The present aging study is possible because excellent PBX 9404 data from those qualification tests endures.

  11. Computer Physics Communications 1 Aging Studies for the Large Honeycomb Drift Tube System of the

    E-Print Network [OSTI]

    Tracker consists of drift tubes folded from polycarbonate foil and is operated with Ar/CF4/CO2 as drift for the drift tubes (surface conductivity, drift gas, production materials) have been developed and validated

  12. Computer Physics Communications 1 Aging Studies for the Large Honeycomb Drift Tube System of the

    E-Print Network [OSTI]

    of drift tubes folded from polycarbonate foil and is operated with Ar/CF 4 /CO 2 as drift gas. The detector tubes (surface conductivity, drift gas, production materials) have been developed and validated for use

  13. Two-Sensor System for Absolute Age and Temperature History - Energy

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron Spin Transition in2,EHSS A-Zandof EnergyTwoTwo

  14. Managing Aging Effects on Dry Cask Storage Systems for Extended Long Term

    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 DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment ofLetterEconomyDr.Energy University ofOverviewManagementStorage

  15. New Technologies for Repairing Aging Cables in Nuclear Power Plants

    SciTech Connect (OSTI)

    Simmons, Kevin L.; Fifield, Leonard S.; Westman, Matthew P.

    2013-09-11T23:59:59.000Z

    The goal of this project is to demonstrate a proof-of-concept for a technique to repair aging cables that have been subjected to degradation associated with long-term thermal and radiation exposure in nuclear power plants. The physical degradation of the aging cables manifests itself primarily as cracking and increased brittleness of the polymeric electrical insulation. Therefore, the proposed cable-repair concept comprises development of techniques to impart a softening agent within the deteriorated polymer insulation jacket so as to regain the ability of the insulation to stretch without failing and possibly to heal existing cracks in the insulation. Our approach is to use commercially available ethylene-propylene rubber (EPR) as the relevant test material, demonstrate the adsorption of chemical treatments in the EPR and quantify changes in resulting physical and mechanical properties. EPR cable samples have been thermally treated in air to produce specimens corresponding to the full range of cable age-performance points from new (>350% elongation at break) to end-of-life (<50% elongation at break). The current focus is on two chemical treatments selected as candidates for restoring age-related cable elasticity loss: a rubber plasticizer and a reactive silane molecule. EPR specimens of 200, 150, 100, and 50% elongation at break have been soaked in the candidate chemical treatments and the kinetics of chemical uptake, measured by change in mass of the samples, has been determined. Mechanical properties as a function of aging and chemical treatment have been measured including ultimate tensile strength, tensile modulus at 50% strain, elongation at break, and storage modulus. Dimensional changes with treatment and changes in glass transition temperature were also investigated. These ongoing experiments are expected to provide insight into the physical-chemical nature of the effect of thermal degradation on EPR rejuvenation limits and to advance novel methods for restoring the ability of degraded EPR to be compliant and resist fracture. The results of this research reveal that absorption of chemical treatments can lower the glass transition temperature and modulus of EPR. Chemical treatments pursued thus far have proven ineffective at restoring EPR strength and elongation at break. Future work will combine the plasticizer modalities found to successfully increase the volume of the EPR, reduce EPR glass transition temperature and reduce EPR modulus with promising chemistries that will repair the damage of the polymer, potentially using the plasticizer as a host for the new chemistry.

  16. The BABAR LST Detector High Voltage System: Design and Implementation

    E-Print Network [OSTI]

    Honscheid, Klaus

    in the BaBar experiment to replace the ageing Resistive Plate Chambers (RPCs) as active detectors for the BABAR Instrumented Flux Return (IFR) muon system. Each streamer tube of the new detector consists of 8 were chosen to replace the rapidly ageing Resistive Plate Chambers (RPCs) in the Instrumened Flux

  17. The Early Formation, Evolution and Age of the Neutron-Capture Elements in the Early Galaxy

    E-Print Network [OSTI]

    J. J. Cowan; C. Sneden; J. W. Truran

    2001-03-14T23:59:59.000Z

    Abundance observations indicate the presence of rapid-neutron capture (i.e., r-process) elements in old Galactic halo and globular cluster stars. These observations demonstrate that the earliest generations of stars in the Galaxy, responsible for neutron-capture synthesis and the progenitors of the halo stars, were rapidly evolving. Abundance comparisons among several halo stars show that the heaviest neutron-capture elements (including Ba and heavier) are consistent with a scaled solar system r-process abundance distribution, while the lighter such elements do not conform to the solar pattern. These comparisons suggest two r-process sites or at least two different sets of astrophysical conditions. The large star-to-star scatter observed in the neutron-capture/iron ratios at low metallicities -- which disappears with increasing [Fe/H] -- suggests an early, chemically unmixed and inhomogeneous Galaxy. The stellar abundances indicate a change from the r-process to the slow neutron capture (i.e., s-) process at higher metallicities in the Galaxy. The detection of thorium in halo and globular cluster stars offers a promising, independent age-dating technique that can put lower limits on the age of the Galaxy.

  18. Aging and Gas Filtration Studies in the ATLAS Transition Radiation Tracker

    E-Print Network [OSTI]

    Sprachmann, Gerald; Stri, Herbert

    2006-01-01T23:59:59.000Z

    The Transition Radiation Tracker (TRT) is one of three particle tracking detectors of the ATLAS Inner Detector whose goal is to exploit the highly exciting new physics potential at CERN's next accelerator, the so-called Large Hadron Collider (LHC). The TRT consists of 370000 straw proportional tubes of 4 mm diameter with a 30 micron anode wire, which will be operated with a Xe/CO2/O2 gas mixture at a high voltage of approximately 1.5 kV. This detector enters a new area that requires it to operate at unprecedented high rates and integrated particle fluxes. Full functionality of the detector over the lifetime (10 years) of the experiment is demanded. Aging of gaseous detectors is a term for the degradation of detector performance during exposure to ionizing radiation. This phenomenon involves very complex physical and chemical processes that are induced by pollution originating from very small amounts of silicon-based substances in some components of the gas system. This work presents a review of previous aging...

  19. HST/ACS Direct Ages of the Dwarf Elliptical Galaxies NGC 147 and NGC 185

    E-Print Network [OSTI]

    Geha, M; Grocholski, A; Dolphin, A; van der Marel, R P; Guhathakurta, P

    2015-01-01T23:59:59.000Z

    We present the deepest optical photometry for any dwarf elliptical (dE) galaxy based on Hubble Space Telescope ACS observations of the Local Group dE galaxies NGC 147 and NGC 185. The resulting F606W and F814W color-magnitude diagrams are the first to reach below the main sequence turnoff in a dE galaxy, allowing us to determine full star formation histories in these systems. The ACS fields are located ~1.5 effective radii from the galaxy center to avoid photometric crowding. While our ACS pointings in both dEs show unambiguous evidence for old and intermediate age stars, the mean age in NGC 147 is ~ 4 Gyr younger as compared to NGC 185. In NGC 147, only 40% of stars were in place 12.5 Gyrs ago (z~5), with the bulk of the remaining stellar population forming between 5 to 7 Gyr. In contrast, 70% of stars were formed in NGC 185 field more than12.5 Gyr ago with the majority of the remaining population forming between 8 to 10 Gyr. Star formation ceased in both ACS fields at least 3 Gyr ago. Previous observations ...

  20. Ages of Star Clusters in the Tidal Tails of Merging Galaxies

    E-Print Network [OSTI]

    Mulia, A J; Whitmore, B C

    2015-01-01T23:59:59.000Z

    We study the stellar content in the tidal tails of three nearby merging galaxies, NGC 520, NGC 2623, and NGC 3256, using BVI imaging taken with the Advanced Camera for Surveys on board the Hubble Space Telescope. The tidal tails in all three systems contain compact and fairly massive young star clusters, embedded in a sea of diffuse, unresolved stellar light. We compare the measured colors and luminosities with predictions from population synthesis models to estimate cluster ages and find that clusters began forming in tidal tails during or shortly after the formation of the tails themselves. We find a lack of very young clusters ($\\le 10$ Myr old), implying that eventually star formation shuts off in the tails as the gas is used up or dispersed. There are a few clusters in each tail with estimated ages that are older than the modeled tails themselves, suggesting that these may have been stripped out from the original galaxy disks. The luminosity function of the tail clusters can be described by a single powe...

  1. Quantitative Neuroimaging : : Applications to Normal Aging and Neurodegenerative Disease

    E-Print Network [OSTI]

    Murphy, Elizabeth Ann

    his laboratory from General Electric Medical Systems as parthis laboratory from General Electric Medical Systems as partNIA RC2AG036535 and General Electric Medical Foundation and

  2. From Three Possible Iron-Age World-Systems to a Single Afro-Eurasian World-System

    E-Print Network [OSTI]

    Boyer, Edmond

    of population movements--partly triggered by climate deterioration--and internal conflicts within soci- eties,2 proposed by Morin (1990: 244). 2 "All the cores imploded, not merely those affected by invasions" (Ekholm.c. corresponds to a period of transformation--a period that should perhaps be shortened, judging by the short

  3. Revisiting the Aging Aircraft Nondestructive Inspection Validation Center -- A resource for the FAA and industry

    SciTech Connect (OSTI)

    Smith, C. [Federal Aviation Administration, Atlantic City, NJ (United States). FAATC Technical Center; Walter, P.L. [Sandia National Labs., Albuquerque, NM (United States)

    1995-08-01T23:59:59.000Z

    The Aging Aircraft Nondestructive Inspection Validation Center (commonly designated AANC or The Validation Center) was founded by the Federal Aviation Administration (FAA) in response to the Aviation Safety Research Act of 1988, which mandates that the FAA carry out research and develop technologies to help the aviation industry to (1) better predict the effects of design, maintenance, testing, wear and fatigue in the life of an aircraft; (2) develop methods for improving aircraft maintenance technology and practices including nondestructive inspection; and (3) expand general long range research activities applicable to aviation systems. The AANC validates NDI technology, provides a quick response capability, assesses the reliability of NDI applications, and performs other projects to support the FAA and aviation industry. Sandia National Laboratories was funded by the FAA in August 1991 to establish the Validation Center at Albuquerque International Airport.

  4. Proceedings of the Inaugural Meeting of the International Forum for Reactor Aging Management (IFRAM)

    SciTech Connect (OSTI)

    Bond, Leonard J.; Brenchley, David L.

    2011-09-01T23:59:59.000Z

    In almost all countries with nuclear power plants (NPPs), regulatory authorities and the nuclear industry are looking at some form of extended operating periods. To support life extension activities it is necessary to ensure the continued safety and reliability of system, structures, and components, and the component materials. Internationally, a variety of individual national and international activities have been initiated including Plant Life Management through the International Atomic Energy Agency, Electric Power Research Institutes Long Term Operation program, and various national programs in managing materials degradation and related topics. The U.S. Nuclear Regulatory Commission (NRC) engaged the international community in workshops in 2005-2006 to identify research needs and to collect information in an expert panel report on Proactive Management of Materials Degradation (PMMD), which was reported in NUREG/CR-6923. These results are also available via an Information Tool on the internet at http://pmmd.pnl.gov. This information builds on the extensive compilations known as the GALL Report (Generic Aging Lessons Learned, NUREG-1801, Vols. 1 and 2). Pacific Northwest National Laboratory (PNNL) recently issued a report on the review of various international activities in PMMD (PNNL-17779). There have also been initiatives by Electricite de France, Tokyo Electric Power Company, EPRI, and others to establish a "Materials Aging Institute." Within the materials degradation research community there are also networks and technical meetings focused on some elements of PMMD. In spite of all these efforts, there is currently no forum to bring together these diverse activities and provide coordinated information exchange and prioritization of materials aging management/PMMD topics. It is believed that the International Forum for Reactor Aging Management (IFRAM) would be a good way to achieve this goal and help develop new approaches for ensuring continued safe operation in existing and future nuclear power plants. To begin addressing this need, NRC has established a Proactive Management of Materials Degradation Program for managing in-service degradation of metallic components in aging NPPs. The NRC is seeking to facilitate the establishment of IFRAM as a network of international experts who would exchange information on operating experience, best practices, and emerging knowledge. These experts would be willing to work jointly and leverage the separate efforts of existing national programs into a unified approach to enable the potential for the safe and economic life extension of NPPs. A proposal for establishing IFRAM was developed and presented at Engagement workshops in Seoul, Korea (October 2009) and Petten, The Netherlands (May 2010). Participants in both groups demonstrated strong interest in the establishment of IFRAM. Therefore the Global Steering Committee was formed to plan and carry out the start-up of IFRAM in 2011. This group finalized the documents for IFRAM and organized the kick-off meeting. This document records the contents of the inaugural meeting of IFRAM, which was held August 4-5, 2011, at the Cheyenne Mountain Resort in Colorado Springs, Colorado. Representatives from Asia, Europe, and the United States met to share information on reactor aging management and make plans for the future. Professor Tetsuo Shoji was elected chairperson of the Leadership Council. This kick-off event transformed the dream of an international forum into a reality. IFRAM has begun to achieve its mission.

  5. Ageing of a granular pile induced by thermal cycling

    E-Print Network [OSTI]

    Thibaut Divoux; Ion Vassilief; Herv Gayvallet; Jean-Christophe Gminard

    2009-06-02T23:59:59.000Z

    Here we show that variations of temperature, even of a few degrees in amplitude, induce the ageing of a granular pile. In particular, we report measurements of physical properties of a granular heap submitted to thermal cycles. Namely, we focus on the evolution of the thermal linear-expansion coefficient and of the thermal conductivity of the pile with the number of cycles. The present contribution nicely supplements a recent article we published elsewhere [Phys. Rev. Lett. \\textbf{101}, 148303 (2008)] and introduces a different and promising method to impose temperature cycles to a granular pile.

  6. The Development of the Bronze Age Funerary Landscape of Nichoria

    E-Print Network [OSTI]

    Boyd, Michael J.

    2014-11-28T23:59:59.000Z

    into the mound. While the mound itself was a focal point in the landscape, the burials within the mound be- came a hidden part of its matrix and lacked a vis- ible memento on its surface (although we should bear in mind the possible use of organic markers... tombs. At Tourkokivouro, the natural topography was probably accented by the creation of a small ar- tificial mound into which four of the Bronze Age tombs (and the later N1) were built. This arrange- ment is particularly reminiscent of other sites...

  7. AGE: a distributed environment for creating interactive animations of graphs

    E-Print Network [OSTI]

    Veatch, Timothy Richard

    1990-01-01T23:59:59.000Z

    Facility . 5. Aesthetics B. Enhancements . C. Summary REFERENCES 72 73 75 76 80 81 APPENDIX A: ACCESS TO AGE 86 APPENDIX B: SOURCE CODE SUMMARY 93 APPENDIX C: CLIENT PRIMITIVES 98 1. AGESOCKET CONNECT . 2. AGEJvlESSAGE READ. . . 3... to the object with the mouse and selecting one of the operations from the menu that pops-up. This method proves simple enough for beginners and is quick enough for experts. In order to be useful in many situations, a set of primitive graph operations has been...

  8. Space-Age Ceramics Get Their Toughest Test

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our Instagram Secretary Moniz9MorganYouofSolvingexplore2 Space and RemoteSpace-Age

  9. Space-Age Ceramics Get Their Toughest Test

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our Instagram Secretary Moniz9MorganYouofSolvingexplore2 Space andSpace-Age Ceramics

  10. Space-Age Ceramics Get Their Toughest Test

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our Instagram Secretary Moniz9MorganYouofSolvingexplore2 Space andSpace-Age

  11. Property:CapRockAge | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation,PillarPublicationType Jump to: navigation, search This isCapRockAge Jump to:

  12. Space-Age Ceramics Get Their Toughest Test

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol HomeFacebookScholarship Fund3Biology|Solar windMarchSpace-Age Ceramics Get

  13. Space-Age Ceramics Get Their Toughest Test

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol HomeFacebookScholarship Fund3Biology|Solar windMarchSpace-Age Ceramics

  14. Library System Library System

    E-Print Network [OSTI]

    Cinabro, David

    Library System #12;Library System 5150 Anthony Wayne Drive David Adamany Undergraduate Library that for the current fiscal year, we've been given an additional $600,000 for our library materials budget. We're very subscriptions. The Wayne State University Libraries are deeply committed to providing our faculty and students

  15. MTTF of a 1 out of n system with preventive maintenance Christiane CocozzaThivent

    E-Print Network [OSTI]

    Cocozza-Thivent, Christiane

    MTTF of a 1 out of n system with preventive maintenance Christiane Cocozza­Thivent Universit´e de. The working item is submitted to an age preventive maintenance: when this item reachs age a, it is replaced by a waiting item if there is one. If not the system fails. The duration of the preventive maintenance is equal

  16. An Economic Assessment Of Uneven-Aged Forestry Based On The Modelling Of Forestry Operations

    E-Print Network [OSTI]

    Shrimpton, Nicole H

    In recent years, interest in uneven-aged forestry has been increasing in Britain, particularly for sensitive areas such as recreation and amenity forests. Literature on the economics of uneven-aged forestry is scarce and ...

  17. Memory, brain and aging: The good, the bad and the promising

    E-Print Network [OSTI]

    Ober, Beth A.

    2010-01-01T23:59:59.000Z

    in the healthy aging brain. Neu- ropsychology 23(5):54150.Development in the Adult Brain. New York, NY: Oxford Univinfluences on cognitive and brain plasticity during aging. J

  18. Effect of Thermal Aging on NO oxidation and NOx storage in a...

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

    Thermal Aging on NO oxidation and NOx storage in a Fully-Formulated Lean NOx Trap Effect of Thermal Aging on NO oxidation and NOx storage in a Fully-Formulated Lean NOx Trap...

  19. Delamination Failures in Long-Term Field Aged PV Modules from...

    Office of Environmental Management (EM)

    Delamination Failures in Long-Term Field Aged PV Modules from Point of View of Encapsulant Delamination Failures in Long-Term Field Aged PV Modules from Point of View of...

  20. Effect of Aging Heat Treatments on Ni52Ti48 Shape Memory Alloy

    E-Print Network [OSTI]

    Akin, Erhan

    2011-10-21T23:59:59.000Z

    to increase transformation temperatures. Furnace-cooling and additional aging heat treatment results in the multi-stage martensitic transformation due to chemical and stress inhomogeneities in the microstructure. Aging of the controlled furnace-cooled material...

  1. The Influence of Self-Perceptions of Aging on Older Adults' Cognition and Behavior

    E-Print Network [OSTI]

    Hughes, Matthew Lane

    2014-07-29T23:59:59.000Z

    memory test; a control group received a vocabulary test. There was evidence that manipulating subjective age affected some cognitive performance, such that higher subjective age was correlated with lower performance. Furthermore, participants who felt...

  2. Cord blood versus age 5 mononuclear cell proliferation on IgE and asthma

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    mite IgE levels, wheeze, cough, eczema and asthma. Results:and report of wheeze, cough and physician diagnosis ofAge 2 Asthma 1 Wheeze 1 Cough 1 Eczema 1 Age 3 Asthma 1

  3. Does Age Effect Dual-tasking Ability? Data from Healthy Participants using a new Experimental Paradigm.

    E-Print Network [OSTI]

    Ghazali, Zayba

    2011-06-29T23:59:59.000Z

    OBJECTIVES: This study aimed to explore age-related differences in dual-tasking. Previous studies report no age-effects in dual-tasking among healthy individuals in comparison to severe dual-tasking impairment in Alzheimers ...

  4. Protein Synthesis and Antioxidant Capacity in Aging Mice: Effects of Long-Term Voluntary Exercise

    E-Print Network [OSTI]

    Garland Jr., Theodore

    enzyme activities and fractional synthesis rate of protein (FSRP) were examined at various ages (226 mo. FSRP decreased with age and increased in muscle of young, but not old, activity-selected mice. Enzyme

  5. Exercise training regulation of extracellular matrix and remodeling in the aging rat heart

    E-Print Network [OSTI]

    Kwak, Hyo Bum

    2009-05-15T23:59:59.000Z

    in the aging heart. In contrast, exercise training not only improves cardiac function, but also reduces the risk of heart disease. However, the ability of exercise training to modulate ECM and remodeling in the aging heart remains unknown. Therefore...

  6. 9.110J / 7.92J Neurology, Neuropsychology, and Neurobiology of Aging, Spring 2003

    E-Print Network [OSTI]

    Corkin, Suzanne

    Lectures and discussions explore the clinical, behavioral, and molecular aspects of brain aging processes in humans. Topics include: loss of memory and other cognitive abilitites in normal aging; neurodegenerative conditions ...

  7. AGE AND GROWTH OF SKIPJACK TUNA, KATSUWONUS PELAMIS, AND YELLOWFIN TUNA, THUNNUS ALBACARES, AS INDICATED

    E-Print Network [OSTI]

    (1971), Marcille and Stequert (1976a), and Diaz3 determined growth rate and estimated the age et al. (1969), Le Guen and Sakagawa (1973), and Marcille and Stequert (1976b) have estimated age

  8. POPULATION ECOLOGY -ORIGINAL PAPER The effects of sex, age and breeding success on breeding dispersal

    E-Print Network [OSTI]

    Laaksonen, Toni

    hypoleuca) around a point source of heavy metals (a copper smelter). We tested for the effects of sex, age copper smelter). We tested, at the indi- vidual level, for the effects of sex, age, breeding success

  9. Rapid Aging and Poisoning Protocols to AssessFuel and Lube Effects...

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

    Rapid Aging and Poisoning Protocols to AssessFuel and Lube Effects on Diesel Aftertreatment (Agreement 13415) Rapid Aging and Poisoning Protocols to AssessFuel and Lube Effects on...

  10. Virginie PRIVAS -BRAUT The Trinity of a new Age: Three struggling Women in

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Virginie PRIVAS - BR?AUT? The Trinity of a new Age: Three struggling Women in Anne Devlin Trinity of a New Age. Ultimately, Ourselves Alone and After Easter can lead us to wonder whether God might

  11. A NEW VIEW OF VEGA'S COMPOSITION, MASS, AND AGE

    SciTech Connect (OSTI)

    Yoon, Jinmi; Peterson, Deane M. [Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800 (United States); Kurucz, Robert L. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Zagarello, Robert J., E-mail: jyoon@grad.physics.sunysb.ed, E-mail: dpeterson@astro.sunysb.ed, E-mail: rkurucz@cfa.harvard.ed, E-mail: rzagarello@mail.astro.sunysb.ed [PCPION, South Setauket, NY 11720-1325 (United States)

    2010-01-01T23:59:59.000Z

    We present estimates of Vega's composition, mass, and age based on a simultaneous fit of high-resolution metal line profiles, the wings of the Balmer lines, the absolute visible/near-IR fluxes, and high angular resolution triple phase data from the Navy Prototype Optical Interferometer to gravity-darkened Roche models. This substantially expands our earlier analysis. We determine that Vega has a much lower mass, 2.135 +- 0.074 M{sub sun}, than generally assumed. This strongly supports the contention that Vega is metal-poor throughout (Z approx 0.008), suggesting it was formed that way. Assuming a uniform composition equal to that derived for the surface, and the luminosity and radius obtained here, we derive a best estimate of Vega's age, 455 +- 13 Myr, and mass, 2.157 +- 0.017 M{sub sun}, by fitting to standard isochrones. We continue to argue that Vega is much too old to be coeval with other members of the Castor moving group and is thus unlikely to be a member. The updated chemical abundances continue to support the conclusion that Vega is a lambda Boo star.

  12. Estimating the age of alleles by use of intraallelic variability

    SciTech Connect (OSTI)

    Slatkin, M.; Rannala, B. [Univ of California, Berkeley, CA (United States)

    1997-02-01T23:59:59.000Z

    A method is presented for estimating the age of an allele by use of its frequency and the extent of variation among different copies. The method uses the joint distribution of the number of copies in a population sample and the coalescence times of the intraallelic gene genealogy conditioned on the number of copies. The linear birth-death process is used to approximate the dynamics of a rare allele in a finite population. A maximum-likelihood estimate of the age of the allele is obtained by Monte Carlo integration over the coalescence times. The method is applied to two alleles at the cystic fibrosis (CFTR) locus, {Delta}F508 and G542X, for which intraallelic variability at three intronic microsatellite loci has been examined. Our results indicate that G542X is somewhat older than {Delta}F508. Although absolute estimates depend on the mutation rates at the microsatellite loci, our results support the hypothesis that {Delta}F508 arose <500 generations ({approx}10,000 years) ago. 32 refs., 4 figs.

  13. Moessbauer measurements of microstructural change in aged duplex stainless steel

    SciTech Connect (OSTI)

    Kirihigashi, A.; Sakamoto, N.; Yamaoka, T. [Mitsubishi Heavy Industries, Ltd., Hyogo (Japan); Nasu, S. [Osaka Univ. (Japan)

    1995-08-01T23:59:59.000Z

    A duplex stainless steel (ASME SA351 CF8M) has usually been manufactured by a continuous casting technique. It consists of a paramagnetic austenite phase and a ferromagnetic ferrite phase. It has been known that the ferrite phase decomposition occurs in this steel after aging between 300 and 450 C. As a result of phase decomposition, a Fe-rich phase and a Cr-rich phase are produced in the ferrite phase. It is difficult to detect the phase decomposition even by not only optical microscopy but also transmission electron microscopy, since the decomposed structure is very fine. However, Moessbauer measurements that can detect the magnetic hyperfine field of magnetic substance may detect the microstructural change. An averaged magnetic hyperfine field increases in the ferrite phase, due to the production of the Fe-rich phase which has high magnetic hyperfine field. Therefore, the authors investigated the phase decomposition of the duplex stainless steel caused by aging, utilization Moessbauer spectroscopy which has capability of detecting this structural change in the atomic level quantitatively. The authors also investigated the potential of backscattering Moessbauer method for NDE technique.

  14. LEVERAGING AGING MATERIALS DATA TO SUPPORT EXTENSION OF TRANSPORTATION SHIPPING PACKAGES SERVICE LIFE

    SciTech Connect (OSTI)

    Dunn, K. [Savannah River National Laboratory; Bellamy, S. [Savannah River National Laboratory; Daugherty, W. [Savannah River National Laboratory; Sindelar, R. [Savannah River National Laboratory; Skidmore, E. [Savannah River National Laboratory

    2013-08-18T23:59:59.000Z

    Nuclear material inventories are increasingly being transferred to interim storage locations where they may reside for extended periods of time. Use of a shipping package to store nuclear materials after the transfer has become more common for a variety of reasons. Shipping packages are robust and have a qualified pedigree for performance in normal operation and accident conditions but are only certified over an approved transportation window. The continued use of shipping packages to contain nuclear material during interim storage will result in reduced overall costs and reduced exposure to workers. However, the shipping package materials of construction must maintain integrity as specified by the safety basis of the storage facility throughout the storage period, which is typically well beyond the certified transportation window. In many ways, the certification processes required for interim storage of nuclear materials in shipping packages is similar to life extension programs required for dry cask storage systems for commercial nuclear fuels. The storage of spent nuclear fuel in dry cask storage systems is federally-regulated, and over 1500 individual dry casks have been in successful service up to 20 years in the US. The uncertainty in final disposition will likely require extended storage of this fuel well beyond initial license periods and perhaps multiple re-licenses may be needed. Thus, both the shipping packages and the dry cask storage systems require materials integrity assessments and assurance of continued satisfactory materials performance over times not considered in the original evaluation processes. Test programs for the shipping packages have been established to obtain aging data on materials of construction to demonstrate continued system integrity. The collective data may be coupled with similar data for the dry cask storage systems and used to support extending the service life of shipping packages in both transportation and storage.

  15. Can 3D Shape of the Face Reveal your Age? Baiqiang Xia1,3

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    (appearance of wrinkles). The shape changes of faces continues from adulthood to old age. With the droops

  16. Observation of different azimuthal emission patterns for K+ and of K- mesons in Heavy Ion Collisions at 1-2 AGeV

    E-Print Network [OSTI]

    F. Uhlig; A. Foerster; I. Boettcher; M. Debowski; F. Dohrmann; E. Grosse; P. Koczon; B. Kohlmeyer; F. Laue; M. Menzel; L. Naumann; H. Oeschler; W. Scheinast; E. Schwab; P. Senger; Y. Shin; H. Stroebele; C. Sturm; G. Surowka; A. Wagner; W. Walus

    2004-11-10T23:59:59.000Z

    Azimuthal distributions of pi+, K+ and K- mesons have been measured in Au+Au reactions at 1.5 AGeV and Ni+Ni reactions at 1.93 AGeV. In semi-central collisions at midrapidity, pi+ and K+ mesons are emitted preferentially perpendicular to the reaction plane in both collision systems. In contrast for K- mesons in Ni+Ni reactions an in-plane elliptic flow was observed for the first time at these incident energies.

  17. Miners and mining in the Late Bronze Age: a multidisciplinary study from

    E-Print Network [OSTI]

    Nicolussi, Kurt

    Research Miners and mining in the Late Bronze Age: a multidisciplinary study from Austria J the principal motors of Bronze Age society. The skills and risks of mining lie behind the weapons, tools. Keywords: Austria, Late Bronze Age, mining, environment, economy 1 Institute for Prehistory

  18. PII S0016-7037(98)00211-7 The young age of Earth

    E-Print Network [OSTI]

    Zhang, Youxue

    PII S0016-7037(98)00211-7 The young age of Earth YOUXUE ZHANG* Department of Geological Sciences form June 8, 1998) Abstract--Patterson (1956) established that the age of Earth is close, disagreement is abundant, and the young age of Earth has not been widely accepted. In this work, I examine all

  19. Worms need microbes too: microbiota, health and aging in Caenorhabditis elegans

    E-Print Network [OSTI]

    Gems, David

    *, David Gems Keywords: aging; C. elegans; metformin; microbiota; type-2 diabetes DOI 10.1002/emmm, diabetes, metabolic syndrome, autoimmune disorders, inflam- matory bowel disease, cancer and aging (Cho and type-2 diabetes, and perhaps aging. These morbidities have a profound impact in terms of individual

  20. The Hon Julie Bishop MP Mrs Joanna Gash MP Minister for Ageing Member for Gilmore

    E-Print Network [OSTI]

    Yu, Ping

    July 2005 JB114/05 Report highlights tech benefits for aged care New research released today the Australian Government's approach to encouraging the uptake of information technology in the aged care sector. Ms Bishop said the report, Capacity and Willingness of Residential Aged Care Workers to Use

  1. TCRS Retirees: Health Insurance Continuation Under Age 65 Eligibility and Service Requirements

    E-Print Network [OSTI]

    Dasgupta, Dipankar

    regardless of age; age 55 with 10 years of service for early retirement. 2. To continue current health plan. Must meet requirements for TCRS retirement: Age 60 with 10 years of service or 30 years of service in insurance plan 3 years or more immediately prior to retirement b. Retirement benefits and insurance must

  2. A total of 377 peat age-depth relationships were used to quantify Holocene subsidence rates.

    E-Print Network [OSTI]

    Kulp, Mark

    A total of 377 peat age-depth relationships were used to quantify Holocene subsidence rates. Subsidence rates were calculated using peat ages calibrated to the sidereal time scale and burial depths a polynomial that relates the peat age to the position of sea-level at that time in the past. The "sea

  3. age body build: Topics by E-print Network

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

    to build such an integrated system we will have to fundamentally change the way artificial intelligence, cognitive science, linguistics, and philosophy think about the...

  4. aged concrete structures: Topics by E-print Network

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

    Dissertations Summary: ??This thesis evaluates a particular ultrasonic nondestructive testing (NDT) system in order to determine its capabilities and limitations in locating...

  5. age family environment: Topics by E-print Network

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

    CiteSeer Summary: The Inscape Environment is an integrated software development enviroment for building large software systems by large groups of developers. It provides...

  6. Gasification Systems

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

    SYSTEMS Gasi cation Systems Advanced Combustion Systems Advanced Turbines Solid Oxide Fuel Cells Plant Optimization Coal Utilization Sciences University Training and Research...

  7. aging status challenges: Topics by E-print Network

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

    challengeS in UnderStanding earth'S dynamic SyStemS January 2009 Long-range Science PLan for SeiSmoLogy WorkSmoLogicaL granD chaLLengeS in unDerStanDing earth'S Dynamic SyStemS...

  8. Age-aware solder performance models : level 2 milestone completion.

    SciTech Connect (OSTI)

    Neilsen, Michael K.; Vianco, Paul Thomas; Neidigk, Matthew Aaron; Holm, Elizabeth Ann

    2010-09-01T23:59:59.000Z

    Legislated requirements and industry standards are replacing eutectic lead-tin (Pb-Sn) solders with lead-free (Pb-free) solders in future component designs and in replacements and retrofits. Since Pb-free solders have not yet seen service for long periods, their long-term behavior is poorly characterized. Because understanding the reliability of Pb-free solders is critical to supporting the next generation of circuit board designs, it is imperative that we develop, validate and exercise a solder lifetime model that can capture the thermomechanical response of Pb-free solder joints in stockpile components. To this end, an ASC Level 2 milestone was identified for fiscal year 2010: Milestone 3605: Utilize experimentally validated constitutive model for lead-free solder to simulate aging and reliability of solder joints in stockpile components. This report documents the completion of this milestone, including evidence that the milestone completion criteria were met and a summary of the milestone Program Review.

  9. Ice Age Epochs and the Sun's Path Through the Galaxy

    E-Print Network [OSTI]

    D. R. Gies; J. W. Helsel

    2005-03-14T23:59:59.000Z

    We present a calculation of the Sun's motion through the Milky Way Galaxy over the last 500 million years. The integration is based upon estimates of the Sun's current position and speed from measurements with Hipparcos and upon a realistic model for the Galactic gravitational potential. We estimate the times of the Sun's past spiral arm crossings for a range in assumed values of the spiral pattern angular speed. We find that for a difference between the mean solar and pattern speed of Omega_Sun - Omega_p = 11.9 +/- 0.7 km/s/kpc the Sun has traversed four spiral arms at times that appear to correspond well with long duration cold periods on Earth. This supports the idea that extended exposure to the higher cosmic ray flux associated with spiral arms can lead to increased cloud cover and long ice age epochs on Earth.

  10. Accelerated aging studies and environmental stability of prototype tamper tapes

    SciTech Connect (OSTI)

    Wright, B.W.; Wright, C.W. [Pacific Northwest Lab., Richland, WA (United States); Bunk, A.R. [Battelle Columbus Lab., OH (United States)] [and others

    1995-05-01T23:59:59.000Z

    This report describes the results of accelerated aging experiments (weathering) conducted on prototype tamper tapes bonded to a variety of surface materials. The prototype tamper tapes were based on the patented Confirm{reg_sign} tamper-indicating technology developed and produced by 3M Company. Tamper tapes bonded to surfaces using pressure sensitive adhesive (PSA) and four rapid-set adhesives were evaluated. The configurations of the PSA-bonded tamper tapes were 1.27-cm-wide Confirm{reg_sign} 1700 windows with vinyl underlay and 2.54-cm-wide Confirm{reg_sign} 1700 windows with vinyl and polyester underlays. The configurations of the rapid-set adhesive-bonded tamper tapes were 2.54-cm-wide Confirm{reg_sign} (1700, 1500 with and without primer, and 1300) windows with vinyl underlay. Surfaces used for bonding included aluminum, steel, stainless steel, Kevlar{reg_sign}, brass, copper, fiberglass/resin with and without gel coat, polyurethane-painted steel, acrylonitrile:butadiene:styrene plastic, polyester fiberglass board, Lexan polycarbonate, and cedar wood. Weathering conditions included a QUV cabinet (ultraviolet light at 60{degrees}C, condensing humidity at 40{degrees}C), a thermal cycling cabinet (-18{degrees}C to 46{degrees}C), a Weather-O-Meter (Xenon lamp), and exposure outdoors in Daytona Beach, Florida. Environmental aging exposures lasted from 7 weeks to 5 months. After exposure, the tamper tapes were visually examined and tested for transfer resistance. Tamper tapes were also exposed to a variety of chemical liquids (including organic solvents, acids, bases, and oxidizing liquids) to determine chemical resistance and to sand to determine abrasion resistance.

  11. Prostate Brachytherapy in Men {>=}75 Years of Age

    SciTech Connect (OSTI)

    Merrick, Gregory S. [Schiffler Cancer Center and Wheeling Jesuit University, Wheeling, WV (United States)], E-mail: gmerrick@urologicresearchinstitute.org; Wallner, Kent E. [Puget Sound Healthcare Corporation, Group Health Cooperative, University of Washington, Seattle, WA (United States); Galbreath, Robert W. [Schiffler Cancer Center and Wheeling Jesuit University, Wheeling, WV (United States); Ohio University Eastern, St. Clairsville, OH (United States); Butler, Wayne M.; Brammer, Sarah G.; Allen, Zachariah A. [Schiffler Cancer Center and Wheeling Jesuit University, Wheeling, WV (United States); Adamovich, Edward [Department of Pathology, Wheeling Hospital, Wheeling, WV (United States)

    2008-10-01T23:59:59.000Z

    Purpose: To evaluate cause-specific survival (CSS), biochemical progression-free survival (bPFS), and overall survival (OS) in prostate cancer patients aged {>=}75 years undergoing brachytherapy with or without supplemental therapies. Methods and Materials: Between April 1995 and August 2004, 145 consecutive patients aged {>=}75 years underwent permanent prostate brachytherapy. Median follow-up was 5.8 years. Biochemical progression-free survival was defined by a prostate-specific antigen level {<=}0.40 ng/mL after nadir. Patients with metastatic prostate cancer or hormone-refractory disease without obvious metastases who died of any cause were classified as dead of prostate cancer. All other deaths were attributed to the immediate cause of death. Multiple clinical, treatment, and dosimetric parameters were evaluated for impact on survival. Results: Nine-year CSS, bPFS, and OS rates for the entire cohort were 99.3%, 97.1%, and 64.5%, respectively. None of the evaluated parameters predicted for CSS, whereas bPFS was most closely predicted by percentage positive biopsies. Overall survival and non-cancer deaths were best predicted by tobacco status. Thirty-seven patients have died, with 83.8% of the deaths due to cardiovascular disease (22 patients) or second malignancies (9 patients). To date, only 1 patient (0.7%) has died of metastatic prostate cancer. Conclusions: After brachytherapy, high rates of CSS and bPFS are noted in elderly prostate cancer patients. Overall, approximately 65% of patients are alive at 9 years, with survival most closely related to tobacco status. We believe our results support an aggressive locoregional approach in appropriately selected elderly patients.

  12. Decomposition mechanisms in thermally-aged thin-film explosives

    SciTech Connect (OSTI)

    Erickson, K.L.; Trott, W.M.; Renlund, A.M.

    1994-10-01T23:59:59.000Z

    The isothermal decomposition of nitrocellulose (NC) has been examined using two substantially different experimental techniques, involving both confined and unconfined samples. The confined isothermal aging technique involved confined thin-film samples heated to temperatures of 150 to 170{degrees}C, for 1 to 72 hours. Condensed-phase chemistry was monitored real-time using FTIR. Results indicated that the first step in decomposition was scission of the O-NO{sub 2} bond and subsequent formation of carbonyl and hydroxyl products. Scission of the O-NO{sub 2} bond appeared to occur by a first-order reaction. The Arrhenius expression for the first-order reaction rate constant was evaluated from the experimental data. The unconfined rapid isothermal decomposition technique involved both high speed-photography and time-of-flight mass spectrometry (TOFMS). Mass spectra obtained from experiments at 420{degrees}C indicated that NO{sub 2} formation and, therefore, scission of the O-NO{sub 2} bond occurred by a first order reaction, the rate constant for which was evaluated from the experimental data. The rate constant for global pseudo-first order decomposition of NC at 450{degrees}C was also estimated from high speed photography results. Rate constants at 420 and 450{degrees}C were predicted using the Arrhenius expression developed from the confined isothermal aging results and were in good agreement with the rate constants obtained at those temperatures in the unconfined rapid decomposition experiments using TOFMS and high-speed photography. Results from these substantially different measurements gave consistent results over a temperature range of about 300{degrees}C, in which reaction rates vary by nine orders of magnitude, and indicate that the two experimental techniques being developed have good potential for studying condensed-phase decomposition of energetic materials.

  13. Asphalt Pavement Aging and TemperatureAsphalt Pavement Aging and Temperature Dependent Properties using a FunctionallyDependent Properties using a Functionally

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Asphalt Pavement Aging and TemperatureAsphalt Pavement Aging and Temperature Dependent Properties Analysis Time Integration Analysis Application Examples: Asphalt Pavement Summary and Conclusions #12) Large fraction produced as hot-mix asphalt (HMA) Most common form of pavement surfacing material (96

  14. Fuel age impacts on gaseous fission product capture during separations

    SciTech Connect (OSTI)

    Jubin, Robert T.; Soelberg, Nicolas R.; Strachan, Denis M.; Ilas, G.

    2012-09-21T23:59:59.000Z

    As a result of fuel reprocessing, volatile radionuclides will be released from the facility stack if no processes are put in place to remove them. The radionuclides that are of concern in this document are 3H, 14C, 85Kr, and 129 Rosnick 2007 I. The question we attempt to answer is how efficient must this removal process be for each of these radionuclides? To answer this question, we examine the three regulations that may impact the degree to which these radionuclides must be reduced before process gases can be released from the facility. These regulations are 40 CFR 61 (EPA 2010a), 40 CFR 190(EPA 2010b), and 10 CFR 20 (NRC 2012), and they apply to the total radonuclide release and to the dose to a particular organ the thyroid. Because these doses can be divided amongst all the radionuclides in different ways and even within the four radionuclides in question, several cases are studied. These cases consider for the four analyzed radionuclides inventories produced for three fuel typespressurized water reactor uranium oxide (PWR UOX), pressurized water reactor mixed oxide (PWR MOX), and advanced high-temperature gascooled reactor (AHTGR)several burnup values and time out of reactor extending to 200 y. Doses to the maximum exposed individual (MEI) are calculated with the EPA code CAP-88 ( , 1992). Two dose cases are considered. The first case, perhaps unrealistic, assumes that all of the allowable dose is assigned to the volatile radionuclides. In lieu of this, for the second case a value of 10% of the allowable dose is arbitrarily selected to be assigned to the volatile radionuclides. The required decontamination factors (DFs) are calculated for both of these cases, including the case for the thyroid dose for which 14C and 129I are the main contributors. However, for completeness, for one fuel type and burnup, additional cases are provided, allowing 25% and 50% of the allowable dose to be assigned to the volatile radionuclides. Because 3H and 85Kr have relatively short half-lives, 12.3 y and 10.7 y, respectively, the dose decreases with the time from when the fuel is removed from the reactor to the time it is processed (herein fuel age). One possible strategy for limiting the discharges of these short halflife radionuclides is to allow the fuel to age to take advantage of radioactive decay. Therefore, the doses and required DFs are calculated as a function of fuel age. Here we calculate, given the above constraints and assumptions, the minimum ages for each fuel type that would not require additional effluent controls for the shorter half-life volatile radionuclides based on dose considerations. With respect to 129I doses, we find that the highest dose is calculated with iodine as a fine particulate. The dose scales as the fraction of the total 129I that is particulate. Therefore, we assume for all of our calculations that 100% of the 129I is particulate and allow the user of the results given here to scale our calculated doses to their needs. To summarize the data given in the body and appendices of this report, we find that the principal isotopes of concern are 3H and 129I, the latter requiring the highest DFs. The maximum DF value for 129I is 8000 for the illustrated cases. The required DF for 3H could be as high as 720, depending on the age of the fuel processed. The DF for 85Kr could be up to ~60, depending on fuel age. The DF for 14C is in many cases 1 (no treatment required) but could be as high as 30. The DFs required are within the range of DFs that are reported for the capture technologies that are available for the volatile radionuclides. Achieving the required 129I and 3H DFs is more challenging. Variations in stack design and other design factors may also significantly impact the DF requirements.

  15. Hypergeometric systems II: GKZ systems

    E-Print Network [OSTI]

    Uli Walther

    2010-09-27T23:59:59.000Z

    Solutions of A-hypergemetric systems. Hypergeometric systems II: GKZ systems ... Power series ansatz: z = ?. ? k=0 aktk shows ak ? vj >0 vj ?1. ? l=0.

  16. The age of the martian meteorite Northwest Africa 1195 and the differentiation history of the shergottites

    SciTech Connect (OSTI)

    Symes, S; Borg, L; Shearer, C; Irving, A

    2007-04-05T23:59:59.000Z

    Samarium-neodymium isotopic analyses of unleached and acid-leached mineral fractions from the recently identified olivine-bearing shergottite Northwest Africa 1195 yield a crystallization age of 348 {+-} 19 Ma and an {var_epsilon}{sub Nd}{sup 143} value of +40.1 {+-} 1.3. Maskelynite fractions do not lie on the Sm-Nd isochron and appear to contain a martian surface component with low {sup 147}Sm/{sup 144}Nd and {sup 143}Nd/{sup 144}Nd ratios that was added during shock. The Rb-Sr system is disturbed and does not yield an isochron. Terrestrial Sr appears to have affected all of the mineral fractions, although a maximum initial {sup 87}Sr/{sup 86}Sr ratio of 0.701614 {+-} 16 is estimated by passing a 348 Ma reference isochron through the maskelynite fraction that is least affected by contamination. The high initial {var_epsilon}{sub Nd}{sup 143} value and the low initial {sup 87}Sr/{sup 86}Sr ratio, combined with the geologically young crystallization age, indicate that Northwest Africa 1195 is derived from a source region characterized by a long-term incompatible element depletion. The age and initial Sr and Nd isotopic compositions of Northwest Africa 1195 are very similar to those of Queen Alexandra Range 94201, indicating these samples were derived from source regions with nearly identical Sr-Nd isotopic systematics. These similarities suggest that these two meteorites share a close petrogenetic relationship and might have been erupted from a common volcano. The meteorites Yamato 980459, Dar al Gani 476, Sayh al Uhaymir 005/008, and Dhofar 019 also have relatively old ages between 474-575 Ma and trace element and/or isotopic systematics that are indicative of derivation from incompatible-element-depleted sources. This suggests that the oldest group of meteorites is more closely related to one another than they are to the younger meteorites that are derived from less incompatible-element-depleted sources. Closed-system fractional crystallization of this suite of meteorites is modeled with the MELTS algorithm using the bulk composition of Yamato 980459 as a parent. These models reproduce many of the major element and mineralogical variations observed in the suite. In addition, the rare-earth element systematics of these meteorites are reproduced by fractional crystallization using the proportions of phases and extents of crystallization that are calculated by MELTS. The combined effects of source composition and fractional crystallization are therefore likely to account for the major element, trace element, and isotopic diversity of all shergottites. Thus, assimilation of a martian crustal component is not required to explain the geochemical diversity of the shergottites.

  17. Sigma phase morphologies in cast and aged super duplex stainless steel

    SciTech Connect (OSTI)

    Martins, Marcelo, E-mail: marcelo.martins@sulzer.com [SULZER BRASIL S/A (Brazil); Sao Paulo Salesian University Center (UNISAL), Americana Division, Av. Eng. Joao Fernandes G. Molina, 905 - Distrito Industrial - 13.213-080 Jundiai-SP (Brazil); Casteletti, Luiz Carlos, E-mail: castelet@sc.usp.br [Department of Materials, Aeronautical and Automotive Engineering, Sao Carlos School of Engineering, University of Sao Paulo (USP), Av. Trabalhador Sao Carlense, 400 - 13.566-590 Sao Carlos - SP (Brazil)

    2009-08-15T23:59:59.000Z

    Solution annealed and water quenched duplex and super duplex stainless steels are thermodynamically metastable systems at room temperature. These systems do not migrate spontaneously to a thermodynamically stable condition because an energy barrier separates the metastable and stable states. However, any heat input they receive, for example through isothermal treatment or through prolonged exposure to a voltaic arc in the welding process, cause them to reach a condition of stable equilibrium which, for super duplex stainless steels, means precipitation of intermetallic and carbide phases. These phases include the sigma phase, which is easily identified from its morphology, and its influence on the material's impact strength. The purpose of this work was to ascertain how 2-hour isothermal heat treatments at 920 deg. C and 980 deg. C affect the microstructure of ASTM A890/A890M GR 6A super duplex stainless steel. The sigma phase morphologies were found to be influenced by these two aging temperatures, with the material showing a predominantly lacy microstructure when heat treated at 920 deg. C and block-shaped when heat treated at 980 deg. C.

  18. The politics of skill building in a global age

    E-Print Network [OSTI]

    McCaffrey, Sara Jane

    2009-01-01T23:59:59.000Z

    National skills systems have historically imposed significant constraints on production strategies. This dissertation investigates the impact of the home economy skill base on firms' off-shoring and out-sourcing decisions, ...

  19. age determinations carried: Topics by E-print Network

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

    strategies used for the LHC gas detectors and their gas systems. The effect on the detector lifetime of some parameters used in controlled laboratory tests is discussed. An R&D...

  20. asa grade aged: Topics by E-print Network

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

    analysis of 5,384 contact, 2,957 semi-detached, and 2,758 detached systems. The statistics of the distribution provides a qualitative confirmation of decades old idea of...

  1. Age-associated impaired plasmacytoid dendritic cell functions lead to decreased CD4 and CD8 T cell immunity.

    E-Print Network [OSTI]

    2011-01-01T23:59:59.000Z

    plasmacytoid dendritic cell (PDC) function because they areof the antigen- presenting capacity of aged PDC withyoung PDC revealed that PDCs from aged subjects display

  2. PREDICTING GLOBAL MEASURES OF DEVELOPMENT AT 18-MONTHS OF AGE FROM SPECIFIC MEASURES OF COGNITIVE ABILITY AT 10-MONTHS OF AGE

    E-Print Network [OSTI]

    Schmeidler, Tasha Diane

    2009-12-09T23:59:59.000Z

    on tasks that are presumably EF- related during infancy, there is a noticeable gap in the EF research for children between the ages of one- and three-years; this is especially true between the ages of one and two years. McGuigan and Nunez (2006) related... the development of EF within this age group, McGuigan and Nunez (2006) used a modified version of the detour reaching task. In the infant version of this task, a desired object is placed in a transparent box within the infants reach; however, the closed side...

  3. On the Lengths, Colours and Ages of Bars

    E-Print Network [OSTI]

    F. Combes; J. Palous; Dimitri A. Gadotti; Ronaldo E. De Souza

    2006-01-01T23:59:59.000Z

    Abstract. In an effort to obtain further observational evidences for secular evolution processes in galaxies, as well as observational constraints to current theoretical models of secular evolution, we have used BVRI and Ks images of a sample of 18 barred galaxies to measure the lengths and colours of bars, create colour maps and estimate global colour gradients. In addition, applying a method we developed in a previous article, we could distinguish for 7 galaxies in our sample those whose bars have been recently formed from the ones with already evolved bars. We estimated an average difference in the optical colours between young and evolved bars that may be translated to an age difference of the order of 10 Gyr, meaning that bars may be long standing structures. Moreover, our results show that, on average, evolved bars are longer than young bars. This seems to indicate that, during its evolution, a bar grows longer by capturing stars from the disk, in agreement with recent numerical and analytical results.

  4. Oxide Film Aging on Alloy 22 in Halide Containing Solutions

    SciTech Connect (OSTI)

    Rodriguez, Martin A.; Carranza, Ricardo M. [Dept. Materiales, Comision Nacional de Energia Atomica, Av. Gral. Paz 1499, Villa Maipu, 1650 (Argentina); Rebak, Raul B. [Lawrence Livermore National Laboratory, 7000 East Ave, L-631, Livermore, CA, 94550-9698 (United States)

    2007-07-01T23:59:59.000Z

    Passive and corrosion behaviors of Alloy 22 in chloride and fluoride containing solutions, changing the heat treatment of the alloy, the halide concentration and the pH of the solutions at 90 deg. C, was investigated. The study was implemented using electrochemical techniques, which included open circuit potential monitoring over time, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements carried out at open circuit and at passivity potentials. Corrosion rates obtained by EIS measurements after 24 h immersion in naturally aerated solutions were below 0.5 {mu}m/year. The corrosion rates were practically independent of solution pH, alloy heat treatment and halide ion nature and concentration. EIS low frequency resistance values increased with applied potential in the passive domain and with polarization time in pH 6 - 1 M NaCl at 90 deg. C. This effect was attributed to an increase in the oxide film thickness and oxide film aging. High frequency capacitance measurements indicated that passive oxide on Alloy 22 presented a double n-type/p-type semiconductor behavior in the passive potential range. (authors)

  5. No stellar age gradient inside supergiant shell LMC 4

    E-Print Network [OSTI]

    Jochen M. Braun; Dominik J. Bomans; Jean-Marie Will; Klaas S. de Boer

    1997-08-08T23:59:59.000Z

    The youngest stellar populations of a 'J'-shaped region (400 pc strip E-W across LH 77 and 850 pc S-N) inside the supergiant shell (SGS) LMC 4 (with a diameter of 1.4 kpc) have been analysed with CCD photometry in B,V passbands. Isochrone fitting to the colour-magnitude diagrams yields ages in the range from 9 Myr to 16 Myr without correlation with the distance to the LMC 4 centre. We construct the luminosity function and the mass function of five regions to ensure that projection effects don't mask the results. The slopes lie in the expected range (gamma in [0.22;0.41] and Gamma in [-1.3;-2.4] respectively, with the Salpeter value of Gamma = -1.35). After our calculations a total of 5-7 10^3 supernovae has dumped the energy of 10^54.5 erg over the past 10 Myr into LMC 4, in fact enough to tear the original star-forming cloud apart in the time span between 5 and 8 Myr after the starformation burst, initiated by a large scale triggering event. We conclude that LMC 4 can have been formed without a contribution from stochastic self-propagating star formation (SSPSF).

  6. Aging and Fracture of Human Cortical Bone and Tooth Dentin

    SciTech Connect (OSTI)

    Ager, Joel; Koester, Kurt J.; Ager III, Joel W.; Ritchie, Robert O.

    2008-05-07T23:59:59.000Z

    Mineralized tissues, such as bone and tooth dentin, serve as structural materials in the human body and, as such, have evolved to resist fracture. In assessing their quantitative fracture resistance or toughness, it is important to distinguish between intrinsic toughening mechanisms which function ahead of the crack tip, such as plasticity in metals, and extrinsic mechanisms which function primarily behind the tip, such as crack bridging in ceramics. Bone and dentin derive their resistance to fracture principally from extrinsic toughening mechanisms which have their origins in the hierarchical microstructure of these mineralized tissues. Experimentally, quantification of these toughening mechanisms requires a crack-growth resistance approach, which can be achieved by measuring the crack-driving force, e.g., the stress intensity, as a function of crack extension ("R-curve approach"). Here this methodology is used to study of the effect of aging on the fracture properties of human cortical bone and human dentin in order to discern the microstructural origins of toughness in these materials.

  7. Ferrocyanide safety project ferrocyanide aging studies. Final report

    SciTech Connect (OSTI)

    Lilga, M.A.; Hallen, R.T.; Alderson, E.V. [and others

    1996-06-01T23:59:59.000Z

    This final report gives the results of the work conducted by Pacific Northwest National Laboratory (PNNL) from FY 1992 to FY 1996 on the Ferrocyanide Aging Studies, part of the Ferrocyanide Safety Project. The Ferrocyanide Safety Project was initiated as a result of concern raised about the safe storage of ferrocyanide waste intermixed with oxidants, such as nitrate and nitrite salts, in Hanford Site single-shell tanks (SSTs). In the laboratory, such mixtures can be made to undergo uncontrolled or explosive reactions by heating dry reagents to over 200{degrees}C. In 1987, an Environmental Impact Statement (EIS), published by the U.S. Department of Energy (DOE), Final Environmental Impact Statement, Disposal of Hanford Defense High-Level Transuranic and Tank Waste, Hanford Site, Richland, Washington, included an environmental impact analysis of potential explosions involving ferrocyanide-nitrate mixtures. The EIS postulated that an explosion could occur during mechanical retrieval of saltcake or sludge from a ferrocyanide waste tank, and concluded that this worst-case accident could create enough energy to release radioactive material to the atmosphere through ventilation openings, exposing persons offsite to a short-term radiation dose of approximately 200 mrem. Later, in a separate study (1990), the General Accounting Office postulated a worst-case accident of one to two orders of magnitude greater than that postulated in the DOE EIS. The uncertainties regarding the safety envelope of the Hanford Site ferrocyanide waste tanks led to the declaration of the Ferrocyanide Unreviewed Safety Question (USQ) in October 1990.

  8. Aging management of nuclear power plant containments for license renewal

    SciTech Connect (OSTI)

    Liu, W.C.; Kuo, P.T.; Lee, S.S.

    1997-09-01T23:59:59.000Z

    In 1990, the Nuclear Management and Resources Council (NUMARC), now the Nuclear Energy Institute (NEI), submitted for NRC review, the industry reports (IRs), NUMARC Report 90-01 and NUMARC Report 90-10, addressing aging management issues associated with PWR containments and BWR containments for license renewal, respectively. In 1996, the Commission amended 10 CFR 50.55a to promulgate requirements for inservice inspection of containment structures. This rule amendment incorporates by reference the 1992 Edition with the 1992 Addenda of Subsections IWE and IWL of the ASME Code addressing the inservice inspection of metal containments/liners and concrete containments, respectively. The purpose of this report is to reconcile the technical information and agreements resulting from the NUMARC IR reviews which are generally described in NUREG-1557 and the inservice inspection requirements of subsections IWE and IWL as promulgated in {section}50.55a for license renewal consideration. This report concludes that Subsections IWE and IWL as endorsed in {section}50.55a are generally consistent with the technical agreements reached during the IR reviews. Specific exceptions are identified and additional evaluations and augmented inspections for renewal are recommended.

  9. Impact of aging on asphalt pavement performance, ductility and DSR measurements

    E-Print Network [OSTI]

    Al-Azri, Nasser Ahmed

    2002-01-01T23:59:59.000Z

    . . . . . . . . . . . . 39 111-6 The Eslimated Ductility Values of Texas, SH 21 Cores. . . . . . 41 111-7 Field and Lab-aged Exxon AC-20 Hardening Rate. . . . . . . . 43 LIST OF FIGURES FIGURE Page G' versus tI'/G' at (15 'C and 0. 005 rad/s) (Ruan, 2002). . . , 12... Susceptibility of Exxon AC-20 Obtained for Lab- and Field-Aged Binder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 The G' Versus tI*/G' of Lab- and Field-Aged Fxxon AC-20...

  10. A Review of "Humanism in an Age of Science: The Amsterdam Athenaeum in the Golden Age, 1632-1704" by Dirk van Miert

    E-Print Network [OSTI]

    McCarthy, Joseph M.

    2010-01-01T23:59:59.000Z

    study by agreeing with Anthony Grafton?s observation that, ?Humanism lived, deep into the age of science,? an insight evidenced buy the experience of the Amsterdam Athenaeum. Clear, graceful and thorough, this is a distinguished and rewarding contribu...

  11. Age Matters: Efficient Route Discovery in Mobile Ad Hoc Networks

    E-Print Network [OSTI]

    Grossglauser, Matthias

    part) by the National Competence Center in Research on Mobile Information and Communication Systems, resources such as bandwidth and bat- tery power are usually severely constrained in such networks. Therefore incur less overhead at the expense of higher route setup latency. Hybrid routing protocols [7, 6

  12. On the Increasing Fragility of Human Teeth with Age: A Deep-Ultraviolet Resonance Raman Study

    E-Print Network [OSTI]

    2006-01-01T23:59:59.000Z

    respect to age and osteoporosis. Bone 19:479-484. Zioupos P,L. J. Melton, editors Osteoporosis: Etiology, Diagnosis, andmetabolic diseases such as osteoporosis; however, the Page

  13. Distribution of terrestrial age and petrologic type of meteorites from western Libya

    SciTech Connect (OSTI)

    Jull, A.J.T.; Donahue, D.J. (Univ. of Arizona, Tucson (USA)); Wlotzka, F.; Palme, H. (Max-Planck-Institut fuer Chemie, Mainz (West Germany))

    1990-10-01T23:59:59.000Z

    A group of 54 meteorites have been recovered from Daraj, Western Libya. After assessment of pairing of samples, using petrologic criteria, {sup 14}C terrestrial ages were obtained on 13 samples selected from 9 different fall events. Eleven of the ages range from 3,500 to 7,600 years, with only two samples having ages in excess of 10,000 years. The cut-off in ages may be related to the timing of climatic changes in the Hammadah al Hamra.

  14. andropausal middle-aged men: Topics by E-print Network

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

    globulin (alternatively known as a binding protein) (SHBG), prolactin (PRL), estrone (E 1), and cortisol (CRT). Age was measured in years. Adjusted analyses added...

  15. Aging Enhances the Production of Reactive Oxygen Species andBactericid...

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

    Enhances the Production of Reactive Oxygen Species andBactericidal Activity in Peritoneal Macrophages by Aging Enhances the Production of Reactive Oxygen Species andBactericidal...

  16. age-dependent weight gain: Topics by E-print Network

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

    even under physiological conditions (Moulton et Elke Weiler; Albert I. Farbman 1997-01-01 29 From CIE 2006 physiological model to improved age-dependent and Computer...

  17. adults aged 18-64: Topics by E-print Network

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

    The "Aging in Place" project strives to delay taking that first step away from the family home. Through the careful placement of technological support we believe older...

  18. Thermal Storage Options for HVAC Systems

    E-Print Network [OSTI]

    Weston, R. F.; Gidwani, B. N.

    THERMAL STORAGE OPTIONS FOR HVAC SYSTEMS B. N. Gidwani, P.E. Roy F. Weston, Inc. West Chester, Pennsylvania ABSTRACT With the ever-increasing cost of electricity and the high demand charges levied by utility compa nies, thermal storage... for cooling is rapidly becom ing a widely recognized method to lower cooling costs. There are three maior types of thermal stor age systems: ? Ice Storage: This utilizes the latent heat of fusion of ice for thermal storage. During off Deak periods...

  19. REALTIME DATABASE SYSTEMS: ARCHITECTURE AND TECHNIQUES

    E-Print Network [OSTI]

    Ramamritham, Krithi

    monitoring 175 13.3 ECA rule extended with temporal attributes 178 13.4 Response time in a real­time system using ECA paradigm. 182 14.1 A Real Time Database System 188 14.2 Maximum Age (MA) and Unapplied Update (UU) 192 14.3 Inter­arrival distribution of the stock price updates of G.E. on 94/1/3. 194 14

  20. Onsite Wastewater Treatment Systems: Graywater Safety

    E-Print Network [OSTI]

    Melton, Rebecca; Lesikar, Bruce J.

    2008-10-23T23:59:59.000Z

    irrigation and decr,ease the amount of wastewater entering sewers or onsite wastewater treatment systems. Onsite wastewater treatment systems However, homeowners who irrigate their lawns with graywater need to understand the risks and safety issues.... Residential wastewater can be classified as either blackwater (sew- age containing fecal matter or food wastes) or graywater. If graywater is collected separately from blackwater, it can be dispersed as irrigation water with less treatment than...

  1. Double dark state cooling in a three level system

    E-Print Network [OSTI]

    Javier Cerrillo; Alex Retzker; Martin B. Plenio

    2011-12-29T23:59:59.000Z

    A detailed study of a robust and fast laser cooling scheme on a three level system is presented. A special laser configuration, applicable to trapped ions, atoms or cantilevers, designs a quantum interference that eliminates the blue sideband in addition to the carrier transition, thus excluding any heating process involving up to one-phonon processes. As a consequence cooling achieves vanishing phonon occupation up to first order in the Lamb-Dicke parameter expansion. Underlying this scheme is a combined action of two cooling schemes which makes the proposal very stable under fluctuations of the physical parameters such as laser intensity or detuning, making it a viable candidate for experimental implementation. Furthermore, it is considerably faster than existing ground state cooling schemes, overcoming one of the limitations of current quantum information processing implementations. Its suitability as a cooling scheme for several ions in a trap or for a cloud of atoms in a dipole trap is shown.

  2. Condensed-phase decomposition in thermally-aged explosives

    SciTech Connect (OSTI)

    Erickson, K.L.; Trott, W.M.; Renlund, A.M.

    1995-12-01T23:59:59.000Z

    In previous work, the isothermal decomposition of nitrocellulose (NC) was examined using two substantially different experimental techniques that are being developed to investigate condensed-phase chemistry occurring during the thermal decomposition of a variety of explosives. The confined isothermal aging technique involved confined thin-film samples heated to temperatures of 150 to 170{degrees}C, for 1 to 72 hours. Condensed-phase chemistry was monitored real-time using FTIR. Results indicated that the first step in decomposition was scission of the O-NO{sub 2} bond and subsequent formation of carbonyl and hydroxyl products. Scission of the O-NO{sub 2} bond appeared to occur by a first-order reaction. Additional unconfined rapid isothermal decomposition experiments with NC have been completed and are described in this paper. Those additional experiments extended the previous work and investigated the effect of varying film thickness (from about 0.2 to 0.6 microns), varying temperature (from about 420 to 640{degrees}C), and using {sup 15}NO{sub 2}-labled NC. The results indicated that decomposition of NC appears to involve at least two principal mechanisms: (1) O-NO{sub 2} bond scission, which is accompanied by carbonyl or hydroxyl formation, and (2) polymer fragmentation. These two mechanisms occur simultaneously. At temperatures of 170{degrees}C, or lower, polymer fragmentation appears negligible, but at temperatures of 420{degrees}C, or higher, polymer fragmentation is appreciable and occurs at rates comparable to those for O-NO{sub 2} bond scission. While polymer fragmentation may be associated with O-NO{sub 2} bond scission, at higher temperatures, additional steps must be involved in the fragmentation mechanism. At each end of the temperatures range from about 150 to 420{degrees}C, the rate of O-NO{sub 2} bond scission appears reasonably consistent with a mechanism dominated by a first-order decomposition step.

  3. Final Report Inspection of Aged/Degraded Containments Program.

    SciTech Connect (OSTI)

    Naus, Dan J [ORNL; Ellingwood, B R [Georgia Institute of Technology; Oland, C Barry [ORNL

    2005-09-01T23:59:59.000Z

    The Inspection of Aged/Degraded Containments Program had primary objectives of (1) understanding the significant factors relating corrosion occurrence, efficacy of inspection, and structural capacity reduction of steel containments and liners of reinforced concrete containments; (2) providing the United States Nuclear Regulatory Commission (USNRC) reviewers a means of establishing current structural capacity margins or estimating future residual structural capacity margins for steel containments, and concrete containments as limited by liner integrity; (3) providing recommendations, as appropriate, on information to be requested of licensees for guidance that could be utilized by USNRC reviewers in assessing the seriousness of reported incidences of containment degradation; and (4) providing technical assistance to the USNRC (as requested) related to concrete technology. Primary program accomplishments have included development of a degradation assessment methodology; reviews of techniques and methods for inspection and repair of containment metallic pressure boundaries; evaluation of high-frequency acoustic imaging, magnetostrictive sensor, electromagnetic acoustic transducer, and multimode guided plate wave technologies for inspection of inaccessible regions of containment metallic pressure boundaries; development of a continuum damage mechanics-based approach for structural deterioration; establishment of a methodology for reliability-based condition assessments of steel containments and liners; and fragility assessments of steel containments with localized corrosion. In addition, data and information assembled under this program has been transferred to the technical community through review meetings and briefings, national and international conference participation, technical committee involvement, and publications of reports and journal articles. Appendix A provides a listing of program reports, papers, and publications; and Appendix B contains a listing of program-related presentations.

  4. Environments of powerful radio galaxies through the cosmic ages

    E-Print Network [OSTI]

    Julie-Ann Goodlet

    2006-02-16T23:59:59.000Z

    I define 3 samples of extragalactic radio sources of type FRII, containing 26 objects in total. The control sample consists of 6C and 7C sources with radio-luminosities of around 10E27 W\\Hz at 151 MHz and z~1. The other samples contain 3CRR sources with either comparable redshifts but radio luminosities about a decade larger or with comparable radio-luminosities but redshifts around z~0.4. These samples are used to investigate the possible evolution of depolarisation and rotation measure properties with redshift and radio luminosity independently. I use the \\citet{kat97} model with 3 flux measurements to estimate the density of the source environment, source age and jet power. Depolarisation and variations in the rotation measure were found to be insensitive to changes in the density of the source environment. This indicates that depolarisation and variations in the rotation measure are not density indicators but map how the disorder in the magnetic field changes with redshift. The model is then used on a larger set of FRII sources taken from the complete 3CRR, 6CE and 7C III samples. I find that the density of the source environment is a strong function of the source radio-luminosity but is insensitive to changes in redshift. The jet power is also a strong function of radio-luminosity but also a weak function of redshift. This indicates that the mass of the black-hole powering FRII sources is epoch dependent. In general, I find that the source environment is dominated by changes in the radio-luminosity but is relatively unaffected by changes in cosmic epoch.

  5. Computer System,

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

    undergraduate summer institute http:institutes.lanl.govistisummer-school 2015 Computer System, Cluster, and Networking Summer Institute Purpose The Computer System,...

  6. Narrow field electromagnetic sensor system and method

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1996-01-01T23:59:59.000Z

    A narrow field electromagnetic sensor system and method of sensing a characteristic of an object provide the capability to realize a characteristic of an object such as density, thickness, or presence, for any desired coordinate position on the object. One application is imaging. The sensor can also be used as an obstruction detector or an electronic trip wire with a narrow field without the disadvantages of impaired performance when exposed to dirt, snow, rain, or sunlight. The sensor employs a transmitter for transmitting a sequence of electromagnetic signals in response to a transmit timing signal, a receiver for sampling only the initial direct RF path of the electromagnetic signal while excluding all other electromagnetic signals in response to a receive timing signal, and a signal processor for processing the sampled direct RF path electromagnetic signal and providing an indication of the characteristic of an object. Usually, the electromagnetic signal is a short RF burst and the obstruction must provide a substantially complete eclipse of the direct RF path. By employing time-of-flight techniques, a timing circuit controls the receiver to sample only the initial direct RF path of the electromagnetic signal while not sampling indirect path electromagnetic signals. The sensor system also incorporates circuitry for ultra-wideband spread spectrum operation that reduces interference to and from other RF services while allowing co-location of multiple electronic sensors without the need for frequency assignments.

  7. Narrow field electromagnetic sensor system and method

    DOE Patents [OSTI]

    McEwan, T.E.

    1996-11-19T23:59:59.000Z

    A narrow field electromagnetic sensor system and method of sensing a characteristic of an object provide the capability to realize a characteristic of an object such as density, thickness, or presence, for any desired coordinate position on the object. One application is imaging. The sensor can also be used as an obstruction detector or an electronic trip wire with a narrow field without the disadvantages of impaired performance when exposed to dirt, snow, rain, or sunlight. The sensor employs a transmitter for transmitting a sequence of electromagnetic signals in response to a transmit timing signal, a receiver for sampling only the initial direct RF path of the electromagnetic signal while excluding all other electromagnetic signals in response to a receive timing signal, and a signal processor for processing the sampled direct RF path electromagnetic signal and providing an indication of the characteristic of an object. Usually, the electromagnetic signal is a short RF burst and the obstruction must provide a substantially complete eclipse of the direct RF path. By employing time-of-flight techniques, a timing circuit controls the receiver to sample only the initial direct RF path of the electromagnetic signal while not sampling indirect path electromagnetic signals. The sensor system also incorporates circuitry for ultra-wideband spread spectrum operation that reduces interference to and from other RF services while allowing co-location of multiple electronic sensors without the need for frequency assignments. 12 figs.

  8. aqueous systems part: Topics by E-print Network

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

    and leads to Poincare's returns. Real equations of physics describing observable dynamics, for example, hydrodynamic equations of viscous fluid, are irreversible and exclude...

  9. Electoral systems and campaign finance in legislative elections

    E-Print Network [OSTI]

    Johnson, Joel W.

    2009-01-01T23:59:59.000Z

    Christian Democratic Party (PDC)outperforms the multipleto Christian Democrats (PDC). that is at odds with theincluded in Alianza) and the PDC (the excluded category), (

  10. Microfluidic Systems Integrated Microfluidic Systems**

    E-Print Network [OSTI]

    Ismagilov, Rustem F.

    Microfluidic Systems Integrated Microfluidic Systems** Rustem F. Ismagilov* Keywords: analytical methods enzymes microfluidics microreactors protein structures Microfluidic systems use networks of channels thinner than a human hair to manipulate nanoliter volumes of re- agents. The goal of microfluidics

  11. The Midcontinent rift system in Kansas

    SciTech Connect (OSTI)

    Berendsen, P. (Univ. of Kansas, Lawrence, KS (United States). Kansas Geological Survey)

    1993-03-01T23:59:59.000Z

    A sequence of rift-related mafic volcanic rocks, volcanoclastic-, and clastic sedimentary rocks are recognized in cuttings and cores from about seventy wells in Kansas. The age (1,097.5 Ma) for gabbro in the Poersch [number sign]1 well in northern Kansas, as well as the general petrographic characteristics of the sedimentary rocks throughout the area favors a correlation with established Keweenawan stratigraphy in the Lake Superior region. Rift-related northeast-trending faults and older northwest-trending faults divide the area up into a number of orthogonal fault blocks or basins. Depending upon the tectonic history of the individual basin all or part of the Keweenawan section may be preserved. It is believed that large amounts of Keweenawan clastic sedimentary rock were eroded from the nemaha uplift east of the central graben of the rift and transported in an easterly direction. Prior to deposition of Paleozoic rocks the area was peneplaned. Correlation of various stratigraphic units over any distance is complicated by tectonic activity occurring at several times during the Precambrian and Paleozoic. Stratabound or stratiform deposits can occur both in the Precambrian as well as the overlying Paleozoic rocks. The possibility of massive sulfides to occur in the mafic intrusive rocks must not be excluded. In the core from the Poersch [number sign]1 well sulfides are recognized in gabbroic sills or dikes. Dark, fissile shale, similar to the Nonesuch Shale in the [number sign]1--4 Finn well averages 0.75% organic carbon. Thermal maturation within the rift probably ranges from within the oil window to over maturity.

  12. New age water chillers with water as refrigerant

    E-Print Network [OSTI]

    Khnl-Kinel, J

    1998-01-01T23:59:59.000Z

    Vacuum-process technology producing chilled water needs no refrigerant of the conventional kind, but water from the process itself is used to generate cooling. This eye-catching novelty incorporates many of the considerations about the future of refrigerants: "ozone friendly", no extra demands for safety measures or for skilful operators, no special requirements concerning the installation's components, lower maintenance costs since leakages can be accommodated from the system. Vacuum-process technology may be used not only for production of chilled water but also for Binary Ice - pumpable suspension of minute ice crystals in an aqueous solution. This means that all the advantages related to a latent heat system may become available.

  13. An ageing study of resistive micromegas for the HL-LHC environment

    E-Print Network [OSTI]

    Galn, J; Ferrer-Ribas, E; Giganon, A; Giomataris, I; Herlant, S; Jeanneau, F; Peyaud, A; Schune, Ph; Alexopoulos, T; Byszewski, M; Iakovidis, G; Iengo, P; Ntekas, K; Leontsinis, S; de Oliveira, R; Tsipolitis, Y; Wotschack, J

    2013-01-01T23:59:59.000Z

    Resistive-anode micromegas detectors are in development since several years, in an effort to solve the problem of sparks when working at high flux and high ionizing radiation like in the HL-LHC (up to ten times the luminosity of the LHC). They have been chosen as one of the technologies that will be part of the ATLAS New Small Wheel project (forward muon system). An ageing study is mandatory to assess their capabilities to handle the HL-LHC environment on a long-term period. A prototype has been exposed to several types of irradiation (X-rays, cold neutrons, $^{60}$Co gammas and alphas) above the equivalent charge produced at the detector in five HL-LHC running years without showing any degradation of the performances in terms of gain and energy resolution. This study has been completed with the characterization of the tracking performances in terms of efficiency and spatial resolution, verifying the compatibility of results obtained with both resistive micromegas detectors, irradiated and non-irradiated one.

  14. An ageing study of resistive micromegas for the HL-LHC environment

    E-Print Network [OSTI]

    J. Galn; D. Atti; E. Ferrer-Ribas; A. Giganon; I. Giomataris; S. Herlant; F. Jeanneau; A. Peyaud; Ph. Schune; T. Alexopoulos; M. Byszewski; G. Iakovidis; P. Iengo; K. Ntekas; S. Leontsinis; R. de Oliveira; Y. Tsipolitis; J. Wotschack

    2013-01-31T23:59:59.000Z

    Resistive-anode micromegas detectors are in development since several years, in an effort to solve the problem of sparks when working at high flux and high ionizing radiation like in the HL-LHC (up to ten times the luminosity of the LHC). They have been chosen as one of the technologies that will be part of the ATLAS New Small Wheel project (forward muon system). An ageing study is mandatory to assess their capabilities to handle the HL-LHC environment on a long-term period. A prototype has been exposed to several types of irradiation (X-rays, cold neutrons, $^{60}$Co gammas and alphas) above the equivalent charge produced at the detector in five HL-LHC running years without showing any degradation of the performances in terms of gain and energy resolution. This study has been completed with the characterization of the tracking performances in terms of efficiency and spatial resolution, verifying the compatibility of results obtained with both resistive micromegas detectors, irradiated and non-irradiated one.

  15. Beyond `Further': Collaboration, Community and Compassion in the Digital Age

    E-Print Network [OSTI]

    DeRoux, Margaux

    2011-04-25T23:59:59.000Z

    ? ? ?ix means of navigating around larger systemic isues present within the educational environment. These isues have been clearly mapped by Carmen Kynard. As she states in her excelent esay Wanted: Some Black Long Distance [Writers], the majority... of students who have at-home computer aces are wealthy and white; urban composition clases often have litle or no aces to computers, and just as schooling itself has maintained racial hierarchies[in terms of technology] old inequalities simply get mapped...

  16. Understanding the genetics of aging: a canine model

    E-Print Network [OSTI]

    Canterberry, Sarah Christine

    2007-04-25T23:59:59.000Z

    , 2003). Mutations that affect multiple systems have bfeen found to extend the worm?s life expectancy. Such mutations in genes that play roles in the insulin-signaling pathway, caloric restriction, oxidative stress, signal.... eleganfs (Morris et al., 1996). Additionally, mutations in eat that cause defects in pharyngeal function have bfeen found to extend life span, possibfly bfy mimicking caloric restriction (Lakowski and Hekimi, 1998...

  17. Fuzzy logic based operated device identification in power distribution systems

    E-Print Network [OSTI]

    Manivannan, Karthick Muthu

    2002-01-01T23:59:59.000Z

    by the po~er lines and the other components of distribution systems make them vulnerable to various factors like weather, disturbances caused by animals or human activity, overloading of the system and the aging of or defect in, the components...

  18. Aging behavior of polymeric solar absorber materials - Part 1: Engineering plastics

    SciTech Connect (OSTI)

    Kahlen, S. [Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, Leoben 8700 (Austria); Wallner, G.M.; Lang, R.W. [Institute for Polymeric Materials and Testing, University of Linz, Altenbergerstrasse 69, Linz 4040 (Austria)

    2010-09-15T23:59:59.000Z

    In this series of two papers, various polymeric materials are investigated as to their potential applicability as absorber materials for solar thermal collectors. The focus of the investigation is to study the aging behavior of these materials under maximum operating conditions (80 C in water up to 16,000 h) and stagnation conditions (140 C in air up to 500 h) typical for northern climate. The materials supplied or produced as polymer films were first characterized in the unaged state and then for different states of aging by differential scanning calorimetry (DSC), by size exclusion chromatography (SEC) and by mechanical tensile tests. Physical aging phenomena were studied by DSC, SEC analysis provided information on chemical degradation of the materials. In addition, physical and chemical aging were both analyzed via the small and large strain mechanical behavior. While the present Part 1 of this paper series deals with the aging behavior of engineering plastics, including two amorphous polymers (a polyphenylene ether polystyrene blend (PPE + PS) and polycarbonate (PC)) and two semi-crystalline polymers (two types of polyamide 12 (PA12)), the aging behavior of so-called ''commodity'' plastics (PE and PP) is the subject of Part 2. Comparing the two aging conditions, the amorphous materials (PPE + PS and PC) turned out to be more prone to physical and chemical aging at 140 C in air. In contrast, the semi-crystalline PA12 materials were more strongly affected by exposure to water at 80 C, although to different degrees, depending on the modification. (author)

  19. A Study of the Key Variables Affecting Bus Replacement Age Decisions and1 Total Costs2

    E-Print Network [OSTI]

    Bertini, Robert L.

    A Study of the Key Variables Affecting Bus Replacement Age Decisions and1 Total Costs2 3 Jesse operational3 and maintenance (O&M) per-mile costs increase as buses age. From a purely economic4 perspective, there is a cost tradeoff between the lower O&M costs of newer fleets and their5 higher initial capital costs

  20. Effects of creatine loading on electromyographic fatigue threshold during cycle ergometry in college-aged women

    E-Print Network [OSTI]

    Smith, Abbie E.; Walter, Ashley A.; Herda, Trent J.; Ryan, Eric D.; Moon, Jordan R.; Cramer, Joel T.; Stout, Jeffrey R.

    2007-01-01T23:59:59.000Z

    The purpose of this study was to examine the effects of 5 days of Creatine (Cr) loading on the electromyographic fatigue threshold (EMGFT) in college-aged women. Fifteen healthy college-aged women (mean SD = 22.3 1.7 yrs) volunteered...

  1. A depth-derived Pleistocene age model: Uncertainty estimates, sedimentation variability, and nonlinear climate change

    E-Print Network [OSTI]

    Huybers, Peter

    Geology and Geophysics: Geomagnetism (1550); 3220 Mathematical Geophysics: Nonlinear dynamics; 4267 of ages to measurements and events recorded in marine and ice cores as well as to a variety of isolated. [3] The currently favored method for estimating Pleisto- cene age is orbital tuning [e.g., Imbrie et

  2. Guang Ye, Characterization of cement paste at early age, 1 of 11 Fax: +31 15 2785895

    E-Print Network [OSTI]

    Guang Ye, Characterization of cement paste at early age, 1 of 11 Fax: +31 15 2785895 E-mail: ye.guang@ct.tudelft.nl A MICROMECHANIC MODEL FOR CHARACTERIZATION OF CEMENT PASTE AT EARLY AGE VALIDATED WITH EXPERIMENTS Guang Ye Delft of a cement-based material, i.e. the stiffness of cement paste, is the result of the continuous change

  3. Tropospheric SF6: Age of air from the Northern Hemisphere midlatitude surface

    E-Print Network [OSTI]

    Waugh, Darryn W.

    Tropospheric SF6: Age of air from the Northern Hemisphere midlatitude surface D. W. Waugh,1 A. M 2013. [1] Observations of SF6 are used to quantify the mean time since air was in ("mean age" from. Comparisons of simulated SF6 and an idealized clock tracer confirm that the time lag between the SF6 mixing

  4. Health Monitoring of Aging Aerospace Structures using the Electro-Mechanical Impedance Method

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    1 Health Monitoring of Aging Aerospace Structures using the Electro- Mechanical Impedance Method-mechanical (E/M) impedance method for health monitoring of aging aerospace structures. As a nondestructive aircraft, health monitoring, statistics, neural networks, 1. INTRODUCTION Structural health monitoring (SHM

  5. age-related myelin dynamics: Topics by E-print Network

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

    age-related myelin dynamics First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Age related changes in...

  6. Gas ageice age differences and the chronology of the Vostok ice core, M. L. Bender,1

    E-Print Network [OSTI]

    Chappellaz, Jrme

    Gas ageice age differences and the chronology of the Vostok ice core, 0100 ka M. L. Bender,1 G. [1] Gas is trapped in polar ice at depths of $50120 m and is therefore significantly younger than cores (Vostok, Dome Fuji, and Dome C). We recorrelate the gas records of Vostok and Greenland Ice Sheet

  7. Timing of the Early Triassic carbon cycle perturbations inferred from new UPb ages and ammonoid biochronozones

    E-Print Network [OSTI]

    Gilli, Adrian

    reserved. Keywords: carbon isotope; UPb age; time scale; ammonoid; Early Triassic; South China EarthTiming of the Early Triassic carbon cycle perturbations inferred from new UPb ages and ammonoid and Mineral Resources, Jiangzheng Road 1, 530023 Nanning, China Received 13 October 2006; received in revised

  8. The Effects of Alcohol and Age on Astrocytes In Female Rats Following an Inflammatory Stimulus

    E-Print Network [OSTI]

    Simpson, Ashley

    2009-09-30T23:59:59.000Z

    THE EFFECTS OF ALCOHOL AND AGE ON ASTROCYTES IN FEMALE RATS FOLLOWING AN INFLAMMATORY STIMULUS A Senior Scholars Thesis by ASHLEY NICOLE SIMPSON Submitted to the Office of Undergraduate Research Texas A...&M University In partial fulfillment of the requirements for the designation as UNDERGRADUATE RESEARCH SCHOLAR April 2006 Major: Biology THE EFFECTS OF ALCOHOL AND AGE ON ASTROCYTES IN FEMALE RATS FOLLOWING...

  9. A post-Caledonian dolerite dyke from Magery, North Norway: age and geochemistry

    E-Print Network [OSTI]

    Andersen, Torgeir Bjørge

    A post-Caledonian dolerite dyke from Magerøy, North Norway: age and geochemistry DAVID ROBERTS-Caledonian dolerite dyke from Magerøy, North Norway: age and geochemistry. Norsk Geologisk Tidsskrift, Vol. 71, pp, Geological Survey of Norway, Post Box 3006-Lade, N-7(}()2 Trondheim, Norway; John G. Mitchell, Department

  10. Warmly Debated: The Little Ice Age and the Construction of Historical Climatic Regimes, 1650-1950

    E-Print Network [OSTI]

    Gilson, Christopher R.

    2011-08-08T23:59:59.000Z

    . The Medieval Warm Period and the Little Ice Age are the two most commonly referenced and discussed of such regimes. This thesis examines the theories and debates that preceded and surrounded the formal definition of the Little Ice Age as an historic period...

  11. Childhood leukaemia incidence below the age of 5 years near French nuclear power plants

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Childhood leukaemia incidence below the age of 5 years near French nuclear power plants D Laurier 1 living in the vicinity of nuclear power plants in Germany. We present herein results about the incidence of childhood leukaemia in the vicinity of nuclear power plants in France for the same age range. These results

  12. A Stochastic Age-Structured Population Model of Striped Bass (Morone saxatilis) in the Potomac River'

    E-Print Network [OSTI]

    Cohen, Joel E.

    -structured population model of striped bass (Morone saatilis) in the Potomac River. Can. J. Fish. Aquat. Sci. 40A Stochastic Age-Structured Population Model of Striped Bass (Morone saxatilis) in the Potomac. CHRISTENSEN.AND C. P. GOODYEAR.1983. A stochastic age-structured population model of striped bass (Morone sn

  13. Ravaging the wine dark sea: attacks on Crete by sea raiders during the Bronze Age

    E-Print Network [OSTI]

    Stewart, David James

    1997-01-01T23:59:59.000Z

    The Minoan civilization of Bronze Age Crete is one of the most interesting and enigmatic of the ancient world. Writing over half a millennium after the end of the Bronze Age, the historian Thucydides stated that king Minos of Crete had built a navy...

  14. Evolution of obesity prevalence in France: An Age-Period-Cohort analysis

    E-Print Network [OSTI]

    Evolution of obesity prevalence in France: An Age-Period- Cohort analysis Authors : Ibrahima Diouf1, France. Running title: Age-Period-Cohort analysis for obesity prevalence in France Address in the prevalence of obesity has been reported in France since 1990. We investigated the impact of birth cohort

  15. Age-Based Garbage Collection Darko Stefanovic Kathryn S. McKinley J. Eliot B. Moss

    E-Print Network [OSTI]

    McKinley, Kathryn S.

    Age-Based Garbage Collection Darko Stefanovic Kathryn S. McKinley J. Eliot B. Moss Department@cs.umass.edu ABSTRACT Modern generational garbage collectors look for garbage among the young objects, because they have live. We introduce new garbage collection algorithms, called age-based, some of which postpone

  16. Age-Related Differences in Emotional Reactivity, Regulation, and Rejection Sensitivity in Adolescence

    E-Print Network [OSTI]

    Ochsner, Kevin

    Age-Related Differences in Emotional Reactivity, Regulation, and Rejection Sensitivity Massachusetts Institute of Technology James J. Gross Stanford University Katherine A. Remy and Kevin N. Ochsner reactivity or emotion regulation. Study 1 addressed this question by presenting healthy individuals aged 10

  17. AGE, GROWTH, AND SEXUAL MATURITY OF GREENLAND HALIBUT, REINHARDT/US lHPPOGLOSSOIDES (WALBAUM),

    E-Print Network [OSTI]

    AGE, GROWTH, AND SEXUAL MATURITY OF GREENLAND HALIBUT, REINHARDT/US lHPPOGLOSSOIDES (WALBAUM), IN THE CANADIAN NORTHWEST ATLANTIC W. R. BOWERIN01 ABSTRACT Age composition of Greenland halibut, Reinhardtius the slowest throughout the range. Onsetofmaturityoffemale Greenland halibutfrom the Gulfof

  18. Mechanical characteristics of aged Hinoki (Chamaecyparis obtusa Endl.) wood from Japanese historical buildings

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    historical buildings -Comparative analyses with accelerated aging wood- Misao YOKOYAMA*1 , Joseph GRIL*1 Abstract Wood is present in many cultural heritage objects thanks to its capacity to resist odvantage with mechanical characteristics of aged hinoki (Chamaecyparis obtusa Endl.) wood of Japanese historical buildings

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

    E-Print Network [OSTI]

    Wieringa, Roel

    h.g.kerkhoff@utwente.nl Abstract: The semiconductor industry for automotive applications is growingHierarchical Modelling of Automotive Sensor Front-Ends For Structural Diagnosis of Aging Faults, dependability, reliability, aging models, hierarchical interfacing, analogue automotive front-ends. I

  20. CHARACTERISATION OF AGED HDPE PIPES FROM DRINKING WATER DISTRIBUTION: INVESTIGATION OF CRACK DEPTH BY NOL RING

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    BY NOL RING TESTS UNDER CREEP LOADING C. Devilliers 1), 2), 3) , L. Laiarinandrasana 1) , B. Fayolle 2. KEYWORDS HDPE pipes, Nol Ring creep test, ageing effects, fracture mechanism, crack depth ratio, aged layer loading than a monotonic tensile loading. It is to be noticed that the Nol Ring test subjected to a creep