National Library of Energy BETA

Sample records for obtained precautionary steps

  1. Migration of additive molecules in a polymer filament obtained by melt spinning: Influence of the fiber processing steps

    SciTech Connect

    Gesta, E.; Skovmand, O.; Espuche, E. Fulchiron, R.

    2015-12-17

    The purpose of this study is to understand the influence of the yarn processing on the migration of additives molecules, especially insecticide, within polyethylene (PE) yarns. Yarns were manufactured in the laboratory focusing on three key-steps (spinning, post-stretching and heat-setting). Influence of each step on yarn properties was investigated using tensile tests, differential scanning calorimetry and wide-angle X-ray diffraction. The post-stretching step was proved to be critical in defining yarn mechanical and structural properties. Although a first orientation of polyethylene crystals was induced during spinning, the optimal orientation was only reached by post-stretching. The results also showed that the heat-setting did not significantly change these properties. The presence of additives crystals at the yarn surface was evidenced by scanning-electron microscopy. These studies performed at each yarn production step allowed a detailed analysis of the additives’ ability to migrate. It is concluded that while post-stretching decreased the migration rate, heat-setting seems to boost this migration.

  2. Rock Fall Causes Precautionary Evacuation of WIPP Underground

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    November 3, 2016 Rock Fall Causes Precautionary Evacuation of WIPP Underground Employees evacuated the Waste Isolation Pilot Plant (WIPP) underground around 2:30 p.m. (MT) today in response to a reported rock fall. There were no injuries and no release of radiological contamination. Employees working in the area of Panel 7 in the WIPP underground reported a loud noise and observed salt dust indicating a possible rock fall. The employees reported the incident to the Central Monitoring Room (CMR),

  3. Step by Step Instructions

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Step by Step Instructions For Completing An Information Collection Request ________________________________________________________________________ An Information Collection Request (ICR) is a set of documents that describes reporting, record keeping, survey, or other information collection requirements imposed on the public by a federal agency. The Paperwork Reduction Act (PRA) stipulates that every federal agency must obtain approval from the Office of Management and Budget (OMB) before

  4. Next Step for STEP

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Tribal Energy Program Review Denver, Colorado November 18, 2011 Siletz Tribal Energy Program (STEP) Claire Wood, Project Coordinator clairew@ctsi.nsn.us Overview l Tribal Description l Grants - ANA - EECBG-DOE - Low Income Weatherization from DOE as a subgrantee of the state of Oregon - BPA - REACH-DHHS - Climate Showcase Communities-EPA - First Steps-DOE Overview continued l General energy education for tribal members and employees l Specialized Training l Energy Audit l Retrofit l Plans and

  5. Next Step for STEP

    SciTech Connect

    Wood, Claire; Bremner, Brenda

    2013-08-09

    The Siletz Tribal Energy Program (STEP), housed in the Tribe’s Planning Department, will hire a data entry coordinator to collect, enter, analyze and store all the current and future energy efficiency and renewable energy data pertaining to administrative structures the tribe owns and operates and for homes in which tribal members live. The proposed data entry coordinator will conduct an energy options analysis in collaboration with the rest of the Siletz Tribal Energy Program and Planning Department staff. An energy options analysis will result in a thorough understanding of tribal energy resources and consumption, if energy efficiency and conservation measures being implemented are having the desired effect, analysis of tribal energy loads (current and future energy consumption), and evaluation of local and commercial energy supply options. A literature search will also be conducted. In order to educate additional tribal members about renewable energy, we will send four tribal members to be trained to install and maintain solar panels, solar hot water heaters, wind turbines and/or micro-hydro.

  6. NEXT STEPS

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    NEXT STEPS The next major step in the process will be when Golden Pass files its application and final resource reports. Again, Golden Pass anticipates filing this information in July 2014. When we have all the information necessary to complete our analysis and write the EIS, we will issue a Notice of Schedule for Environmental Review. This Notice will announce the target date for issuing the final EIS and disclose the 90-day federal authorization decision deadline for other agencies. Once the

  7. STEP-by-STEP Program Summary

    Energy.gov [DOE]

    STEP-by-STEP Program Summary, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  8. SPAR-H Step-by-Step Guidance

    SciTech Connect

    W. J. Galyean; A. M. Whaley; D. L. Kelly; R. L. Boring

    2011-05-01

    This guide provides step-by-step guidance on the use of the SPAR-H method for quantifying Human Failure Events (HFEs). This guide is intended to be used with the worksheets provided in: 'The SPAR-H Human Reliability Analysis Method,' NUREG/CR-6883, dated August 2005. Each step in the process of producing a Human Error Probability (HEP) is discussed. These steps are: Step-1, Categorizing the HFE as Diagnosis and/or Action; Step-2, Rate the Performance Shaping Factors; Step-3, Calculate PSF-Modified HEP; Step-4, Accounting for Dependence, and; Step-5, Minimum Value Cutoff. The discussions on dependence are extensive and include an appendix that describes insights obtained from the psychology literature.

  9. Stepped nozzle

    DOEpatents

    Sutton, George P.

    1998-01-01

    An insert which allows a supersonic nozzle of a rocket propulsion system to operate at two or more different nozzle area ratios. This provides an improved vehicle flight performance or increased payload. The insert has significant advantages over existing devices for increasing nozzle area ratios. The insert is temporarily fastened by a simple retaining mechanism to the aft end of the diverging segment of the nozzle and provides for a multi-step variation of nozzle area ratio. When mounted in place, the insert provides the nozzle with a low nozzle area ratio. During flight, the retaining mechanism is released and the insert ejected thereby providing a high nozzle area ratio in the diverging nozzle segment.

  10. Stepped nozzle

    DOEpatents

    Sutton, G.P.

    1998-07-14

    An insert is described which allows a supersonic nozzle of a rocket propulsion system to operate at two or more different nozzle area ratios. This provides an improved vehicle flight performance or increased payload. The insert has significant advantages over existing devices for increasing nozzle area ratios. The insert is temporarily fastened by a simple retaining mechanism to the aft end of the diverging segment of the nozzle and provides for a multi-step variation of nozzle area ratio. When mounted in place, the insert provides the nozzle with a low nozzle area ratio. During flight, the retaining mechanism is released and the insert ejected thereby providing a high nozzle area ratio in the diverging nozzle segment. 5 figs.

  11. STEP Intern Job Description

    Office of Energy Efficiency and Renewable Energy (EERE)

    STEP Intern Job Description, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  12. STEP Request For Incentives

    Office of Energy Efficiency and Renewable Energy (EERE)

    STEP Request For Incentives, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  13. STEP Participant Financing Options

    Energy.gov [DOE]

    STEP Participant Financing Options, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  14. STEP Partner Presentation

    Energy.gov [DOE]

    STEP Partner Presentation, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  15. STEP Program Benchmark Report

    Energy.gov [DOE]

    STEP Program Benchmark Report, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  16. STEP Participant Survey Report

    Office of Energy Efficiency and Renewable Energy (EERE)

    STEP Participant Survey Report, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  17. STEP Conference Presentation

    Energy.gov [DOE]

    STEP Conference Presentation, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  18. STEP Participation Agreement

    Energy.gov [DOE]

    STEP Participation Agreement, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  19. STEP Preferred Contractors

    Energy.gov [DOE]

    STEP Preferred Contractors, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  20. Step by Step Instruction - ICR - FINAL | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Step by Step Instruction - ICR - FINAL Step by Step Instruction - ICR - FINAL Step by Step Instructions-ICR-final.doc (31 KB) More Documents & Publications Information Collection ...

  1. Stepping motor controller

    DOEpatents

    Bourret, S.C.; Swansen, J.E.

    1982-07-02

    A stepping motor is microprocessor controlled by digital circuitry which monitors the output of a shaft encoder adjustably secured to the stepping motor and generates a subsequent stepping pulse only after the preceding step has occurred and a fixed delay has expired. The fixed delay is variable on a real-time basis to provide for smooth and controlled deceleration.

  2. Stepping motor controller

    DOEpatents

    Bourret, Steven C.; Swansen, James E.

    1984-01-01

    A stepping motor is microprocessingly controlled by digital circuitry which monitors the output of a shaft encoder adjustably secured to the stepping motor and generates a subsequent stepping pulse only after the preceding step has occurred and a fixed delay has expired. The fixed delay is variable on a real-time basis to provide for smooth and controlled deceleration.

  3. CPCN Step-by-Step Guide | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    CPCN Step-by-Step Guide Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- OtherOther: CPCN Step-by-Step GuideLegal Abstract Step-by-step guide to...

  4. Step 4: Project Implementation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Process Step 4: Project Implementation Presentation Agenda * Step 4: Project Implementation - Pre-construction - Contract execution - Interconnection - Project construction - Commissioning * Project Example 2 1/28/2016 2 1 Potential 3 Refinement 5 Operations & Maintenance 2 Options 4 Implementation 4 Implementation 3 Potential Options Refinement Implementation Operations & Maintenance Step 4: Implementation 4 Purpose: Contract and begin physical construction of project Tasks: * Finalize

  5. Step-by-Step Guide 2006 | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    by-Step Guide 2006 Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- OtherOther: Step-by-Step Guide 2006Legal Abstract A step-by-step guide to...

  6. STEP Participant Survey Executive Summary

    Energy.gov [DOE]

    STEP Participant Survey Executive Summary, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  7. STEP Utility Data Release Form

    Energy.gov [DOE]

    STEP Utility Data Release Form, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  8. STEP Intern Reference Check Sheet

    Energy.gov [DOE]

    STEP Intern Reference Check Sheet, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  9. STEP Utility Bill Analysis Report

    Energy.gov [DOE]

    STEP Utility Bill Analysis Report, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  10. Step 2: Project Options

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    2: Project Options 2 2 Design 1 Potential 3 Refinement 4 Implementation 2 Options 5 Operations & Maintenance 1/28/2016 2 Presentation Agenda * Step 2: Project Options * Project members and roles * Activity * Project ownership options - Interconnection, net metering, permitting, and considerations * Tools * Case in Point 3 Potential Options Refinement Implementation Operations & Maintenance 4 Step 2: Roles, Business Structures, & Regulatory Considerations Purpose: Determine ownership

  11. Stepped inlet optical panel

    DOEpatents

    Veligdan, James T.

    2001-01-01

    An optical panel includes stacked optical waveguides having stepped inlet facets collectively defining an inlet face for receiving image light, and having beveled outlet faces collectively defining a display screen for displaying the image light channeled through the waveguides by internal reflection.

  12. TREC STEP | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    to: navigation, search Name: TREC-STEP Place: India Sector: Services Product: General Financial & Legal Services ( Academic Research foundation ) References: TREC-STEP1...

  13. Step-by-step growth of complex oxide microstructures (Journal...

    Office of Scientific and Technical Information (OSTI)

    This content will become publicly available on June 10, 2016 Title: Step-by-step growth of ... will become publicly available on June 10, 2016 Publisher's Version of Record 10.1002...

  14. Propane Bakery Delivery Step Vans

    Alternative Fuels and Advanced Vehicles Data Center

    Case Study - Propane Bakery Delivery Step Vans April 2016 1 Contents Background .......................................................................................................................................................................... 3 Motivation for Adopting Propane ................................................................................................................................... 3 Financial Benefits

  15. SPAR-H Step-by-Step Guidance

    SciTech Connect

    April M. Whaley; Dana L. Kelly; Ronald L. Boring; William J. Galyean

    2012-06-01

    Step-by-step guidance was developed recently at Idaho National Laboratory for the US Nuclear Regulatory Commission on the use of the Standardized Plant Analysis Risk-Human Reliability Analysis (SPAR-H) method for quantifying Human Failure Events (HFEs). This work was done to address SPAR-H user needs, specifically requests for additional guidance on the proper application of various aspects of the methodology. This paper overviews the steps of the SPAR-H analysis process and highlights some of the most important insights gained during the development of the step-by-step directions. This supplemental guidance for analysts is applicable when plant-specific information is available, and goes beyond the general guidance provided in existing SPAR-H documentation. The steps highlighted in this paper are: Step-1, Categorizing the HFE as Diagnosis and/or Action; Step-2, Rate the Performance Shaping Factors; Step-3, Calculate PSF-Modified HEP; Step-4, Accounting for Dependence, and; Step-5, Minimum Value Cutoff.

  16. STEP Financial Incentives Summary | Department of Energy

    Energy Saver

    STEP Financial Incentives Summary STEP Financial Incentives Summary STEP Financial Incentives Summary, from the Tool Kit Framework: Small Town University Energy Program (STEP). PDF ...

  17. Multiple stage miniature stepping motor

    DOEpatents

    Niven, William A.; Shikany, S. David; Shira, Michael L.

    1981-01-01

    A stepping motor comprising a plurality of stages which may be selectively activated to effect stepping movement of the motor, and which are mounted along a common rotor shaft to achieve considerable reduction in motor size and minimum diameter, whereby sequential activation of the stages results in successive rotor steps with direction being determined by the particular activating sequence followed.

  18. Step 4: Project Implementation Introduction to Step 5: Project...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Project Operations & Maintenance Project Development Process 2 1 Potential 3 Refinement 2 Options 4 Implementation 5 Operations & Maintenance 3 Step 5: Operations & Maintenance ...

  19. Step 5: Operations and Maintenance

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Process Step 5: Project Operations and Maintenance Project Development Process 1 Potential 5 Operations & Maintenance 3 Refinement 2 Options 4 Implementation 2 1/28/2016 2 Presentation Agenda * Step 5: Project Operations and Maintenance (O&M) * Post-procurement activities * Drivers * Technology examples * Activity 3 Potential Options Refinement Implementation Operations & Maintenance Step 5: Operations & Maintenance 4 Photo by Warren Getz, NREL 00180 Purpose: Conduct or ensure

  20. OSHA safety regulation calls for step-by-step approach

    SciTech Connect

    Bellomo, P.J. (Arthur D. Little Inc., Houston, TX (US))

    1992-06-01

    The U.S. Occupational Safety and Health Administration's long-awaited process safety management (PSM) regulation mandates the implementation of a PSM program at facilities handling highly hazardous materials, including oil refineries and petrochemical plants. This article presents a step-by-step PSM program compliance strategy, delineated and explored through practical examples.

  1. The Five-Step Development Process Step 2: Project Options

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    2: Project Options 2 2 Design 1 Potential 3 Refinement 4 Implementation 2 Options 5 Operations & Maintenance Presentation Agenda * Step 2: Project Options * Project members and roles * Activity * Project ownership options - Interconnection, net metering, permitting, and considerations * Tools * Case in Point 3 Potential Options Refinement Implementation Operations & Maintenance 4 Step 2: Roles, Business Structures, & Regulatory Considerations Purpose: Determine ownership structure

  2. Confederated Tribes of Siletz Indians - Next Step for STEP

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    members to learn how to install and maintain solar panels and solar hot water While not usually this cold ANA SEDS Goals l Form Siletz Tribal Energy Program (STEP) l ...

  3. Step-by-step growth of complex oxide microstructures

    DOE PAGES [OSTI]

    Datskos, Panos G.; Cullen, David A.; Sharma, Jaswinder K.

    2015-06-10

    The synthesis of complex and hybrid oxide microstructures is of fundamental interest and practical applications. However, the design and synthesis of such structures is a challenging task. We developed a solution phase process to synthesize complex silica and silica titania hybrid microstructures by exploiting the emulsion droplet based shape control and step by step growth. The strategy is robust and can be extended to make complex hybrid structures made of two or more materials while each having its own shape.

  4. Step 1: Identify Project Potential

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    1: Identify Project Potential Presentation Agenda * Brief Review of Day 1 * Step 1: Identifying Project Potential - Community Market Potential - Resource Potential - Initial Site Considerations * Tools and Resources * Small Group Exercise/Discussion 2 1/28/2016 2 1 Potential 5 Operations & Maintenance 4 Implementation 3 Refinement 2 Options 1 Potential 3 Potential Options Refinement Implementation Operations and Maintenance Step 1: Site, Scale, Resource, and Community Market Potential

  5. OPTIMUM PLASMA STATES FOR NEXT STEP TOKAMAKS

    SciTech Connect

    LIN-LIU,YR; STAMBAUGH,RD

    2002-11-01

    OAK A271 OPTIMUM PLASMA STATES FOR NEXT STEP TOKAMAKS. The dependence of the ideal ballooning {beta} limit on aspect ratio, A, and elongation {kappa} is systematically explored for nearly 100% bootstrap current driven tokamak equilibria in a wide range of the shape parameters (A = 1.2-7.0, {kappa} = 1.5-6.0 with triangularity {delta} = 0.5). The critical {beta}{sub N} is shown to be optimal at {kappa} = 3.0-4.0 for all A studied and increases as A decreases with a dependence close to A{sup -0.5}. The results obtained can be used as a theoretical basis for the choice of optimum aspect ratio and elongation of next step burning plasma tokamaks or tokamak reactors.

  6. STEP Non-Participant Survey Report

    Energy.gov [DOE]

    STEP Non-Participant Survey Report, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  7. STEP Financial Incentives Summary | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Financial Incentives Summary STEP Financial Incentives Summary STEP Financial Incentives Summary, from the Tool Kit Framework: Small Town University Energy Program (STEP). E4 STEP Financial Incentives Summary.pdf (234.59 KB) More Documents & Publications STEP Request For Incentives Maryland Efficiency Program Options STEP Participant Financing Options

  8. Partial Return Yoke for MICE Step IV and Final Step

    SciTech Connect

    Witte, Holger; Plate, Stephen; Berg, J.Scott; Tarrant, Jason; Bross, Alan

    2015-06-01

    This paper reports on the progress of the design and construction of a retro-fitted return yoke for the international Muon Ionization Cooling Experiment (MICE). MICE is a proof-of-principle experiment aiming to demonstrate ionization cooling experimentally. In earlier studies we outlined how a partial return yoke can be used to mitigate stray magnetic field in the experimental hall; we report on the progress of the construction of the partial return yoke for MICE Step IV. We also discuss an extension of the Partial Return Yoke for the final step of MICE; we show simulation results of the expected performance.

  9. Partial return yoke for MICE step IV and final step

    SciTech Connect

    Witte, H.; Plate, S.; Berg, J. S.; Tarrant, J.; Bross, A.

    2015-05-03

    This paper reports on the progress of the design and construction of a retro-fitted return yoke for the international Muon Ionization Cooling Experiment (MICE). MICE is a proof-of-principle experiment aiming to demonstrate ionization cooling experimentally. In earlier studies we outlined how a partial return yoke can be used to mitigate stray magnetic field in the experimental hall; we report on the progress of the construction of the partial return yoke for MICE Step IV. We also discuss an extension of the Partial Return Yoke for the final step of MICE; we show simulation results of the expected performance.

  10. Piezoelectric step-motion actuator

    DOEpatents

    Mentesana; Charles P.

    2006-10-10

    A step-motion actuator using piezoelectric material to launch a flight mass which, in turn, actuates a drive pawl to progressively engage and drive a toothed wheel or rod to accomplish stepped motion. Thus, the piezoelectric material converts electrical energy into kinetic energy of the mass, and the drive pawl and toothed wheel or rod convert the kinetic energy of the mass into the desired rotary or linear stepped motion. A compression frame may be secured about the piezoelectric element and adapted to pre-compress the piezoelectric material so as to reduce tensile loads thereon. A return spring may be used to return the mass to its resting position against the compression frame or piezoelectric material following launch. Alternative embodiment are possible, including an alternative first embodiment wherein two masses are launched in substantially different directions, and an alternative second embodiment wherein the mass is eliminated in favor of the piezoelectric material launching itself.

  11. Hydrodesulfurization and hydrodenitrogenation catalysts obtained from coal mineral matter

    DOEpatents

    Liu, Kindtoken H. D.; Hamrin, Jr., Charles E.

    1982-01-01

    A hydrotreating catalyst is prepared from coal mineral matter obtained by low temperature ashing coals of relatively low bassanite content by the steps of: (a) depositing on the low temperature ash 0.25-3 grams of an iron or nickel salt in water per gram of ash and drying a resulting slurry; (b) crushing and sizing a resulting solid; and (c) heating the thus-sized solid powder in hydrogen.

  12. STEP Brochure (Spanish) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Brochure (Spanish) STEP Brochure (Spanish) STEP Brochure (Spanish), from the Tool Kit Framework: Small Town University Energy Program (STEP). F1b STEP Brochure (Spanish).pdf (318.33 KB) More Documents & Publications Ahorre Energía STEP Brochure (Spanish) Conocimiento de Energia Get Current: Switch on Clean Energy Activity Book

  13. UDAC Next Steps | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Next Steps UDAC Next Steps UDAC Next Steps (382.28 KB) More Documents & Publications Meeting documents from December 9, 2013 UDAC Meeting UDAC Meeting - March 2012 Minutes from December 16, 2013 UDAC Meeting

  14. Initial Steps | Argonne National Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Initial Steps Setting Research and Career Goals Each new postdoc should fill out a Postdoctoral Initial Discussion Form with his or her advisor. This is an opportunity to define career objectives, discuss how this postdoctoral appointment and its related research focus can contribute to those objectives, and identify opportunities for professional development while at Argonne. Postdocs should also consider transferrable skills needed to make successful career transitions and core competencies

  15. Stepped frequency ground penetrating radar

    DOEpatents

    Vadnais, Kenneth G.; Bashforth, Michael B.; Lewallen, Tricia S.; Nammath, Sharyn R.

    1994-01-01

    A stepped frequency ground penetrating radar system is described comprising an RF signal generating section capable of producing stepped frequency signals in spaced and equal increments of time and frequency over a preselected bandwidth which serves as a common RF signal source for both a transmit portion and a receive portion of the system. In the transmit portion of the system the signal is processed into in-phase and quadrature signals which are then amplified and then transmitted toward a target. The reflected signals from the target are then received by a receive antenna and mixed with a reference signal from the common RF signal source in a mixer whose output is then fed through a low pass filter. The DC output, after amplification and demodulation, is digitized and converted into a frequency domain signal by a Fast Fourier Transform. A plot of the frequency domain signals from all of the stepped frequencies broadcast toward and received from the target yields information concerning the range (distance) and cross section (size) of the target.

  16. University Park “STEP-UP” Proposal

    Office of Energy Efficiency and Renewable Energy (EERE)

    University Park “STEP-UP” Proposal: DE-FOA-0000148, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  17. Topic A Note: Includes STEPS Subtopic

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Topic A Note: Includes STEPS Subtopic 33 Total Projects Developing and Enhancing Workforce Training Programs...

  18. Community Energy Strategic Planning- Step 8

    Energy.gov [DOE]

    This presentation provides Step 8 to the Community Energy Strategic Planning approach, Develop a Blueprint for Implementation.

  19. Community Energy Strategic Planning- Step 1

    Energy.gov [DOE]

    This presentation provides Step 1 to the Community Energy Strategic Planning approach, Establish and Charge a Leadership Team.

  20. VISUAL STEP-BY-STEP INSTRUCTIONS ON HOW TO APPLY FOR A JOB ON...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    VISUAL STEP-BY-STEP INSTRUCTIONS ON HOW TO APPLY FOR A JOB ON THE USAJOBS WEBSITE (These instructions also explain the differences between DEU and MP.) STEP 1: Locate the USAJOBS...

  1. Treatment of biomass to obtain ethanol

    DOEpatents

    Dunson, Jr., James B.; Elander, Richard T.; Tucker, III, Melvin P.; Hennessey, Susan Marie

    2011-08-16

    Ethanol was produced using biocatalysts that are able to ferment sugars derived from treated biomass. Sugars were obtained by pretreating biomass under conditions of high solids and low ammonia concentration, followed by saccharification.

  2. Method of Obtaining Uniform Coatings on Graphite

    DOEpatents

    Campbell, I. E.

    1961-04-01

    A method is given for obtaining uniform carbide coatings on graphite bodies. According to the invention a metallic halide in vapor form is passed over the graphite body under such conditions of temperature and pressure that the halide reacts with the graphite to form a coating of the metal carbide on the surface of the graphite.

  3. METHOD OF OBTAINING UNIFORM COATINGS ON GRAPHITE

    DOEpatents

    Campbell, I.E.

    1961-04-01

    A method is given for obtaining uniform carbide coatings on graphite bodies. According to the invention a metallic halide in vapor form is passed over the graphite body under such conditions of temperature and pressure that the halide reacts with the graphite to form a coating of the metal carbide on the surface of the graphite.

  4. Obtain regulatory support services and technical expertise

    Energy.gov [DOE]

    The purpose of this task order (TO) is to obtain regulatory support services and technical expertise required to comply with the March 2005 Compliance Order on Consent (Consent Order), the Individual Permit for Stormwater (IP), Resource Conservation and Recovery Act (RCRA) Hazardous Waste Facility Permit (RCRA Permit, and other applicable compliance areas for Fiscal Year 2016.

  5. Multi-step contrast sensitivity gauge

    DOEpatents

    Quintana, Enrico C; Thompson, Kyle R; Moore, David G; Heister, Jack D; Poland, Richard W; Ellegood, John P; Hodges, George K; Prindville, James E

    2014-10-14

    An X-ray contrast sensitivity gauge is described herein. The contrast sensitivity gauge comprises a plurality of steps of varying thicknesses. Each step in the gauge includes a plurality of recesses of differing depths, wherein the depths are a function of the thickness of their respective step. An X-ray image of the gauge is analyzed to determine a contrast-to-noise ratio of a detector employed to generate the image.

  6. STEP Participant Financing Options | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    PDF icon E5 STEP Participant Financing Options.pdf More Documents & Publications Family Moderate Income Homeowners In New York State Austin's Home Performance with Energy Star ...

  7. Save Energy Now LEADER Pledge Next Steps

    SciTech Connect

    2010-04-07

    Provides an overview of next steps for industrial companies after they sign the Save Energy Now LEADER pledge to reduce their energy intensity 25% in 10 years.

  8. Ever Step Development Ltd | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Ltd. Place: Hong Kong, Hong Kong Sector: Solar Product: Ever Step Development and its sister company Goldmaster Development produce solar and electronic products....

  9. Mimicking Nature - A Step Towards Artificial Photosynthesis|...

    Office of Science (SC)

    Built a synthetic light harvesting antenna which mimics those found in photosynthetic bacteria Significance and Impact Important step in designing bioinspired solar devices that ...

  10. Five Steps to a Profitable Contractor Base

    Energy.gov [DOE]

    Presents an introduction to Session 2: Five Steps to a Profitable Contractor Base. From Residential Energy Efficiency Solutions: From Innovation to Market Transformation, July 10, 2012

  11. Community Energy Strategic Planning - Step 2 | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Community Energy Strategic Planning - Step 2 Community Energy Strategic Planning - Step 2 This presentation provides Step 2 to the Community Energy Strategic Planning approach, ...

  12. Subharmonic structure of Shapiro steps in frustrated superconducting arrays

    SciTech Connect

    Kim, S.; Kim, B.J.; Choi, M.Y.

    1995-11-01

    Two-dimensional superconducting arrays with combined direct and alternating applied currents are studied both analytically and numerically. In particular, we investigate in detail current-voltage characteristics of a square array with 1/2 flux quantum per plaquette and triangular arrays with 1/2 and 1/4 flux quantum per plaquette. At zero temperature reduced equations of motion are obtained through the use of the translational symmetry present in the systems. The reduced equations lead to a series of subharmonic steps in addition to the standard integer and fractional giant Shapiro steps, producing devil`s staircase structure. This devil`s staircase structure reflects the existence of dynamically generated states in addition to the states originating from degenerate ground states in equilibrium. Widths of the subharmonic steps as functions of the amplitudes of alternating currents display Bessel-function-type behavior. We also present results of extensive numerical simulations, which indeed reveal the subharmonic steps together with their stability against small thermal fluctuations. Implications for topological invariance are also discussed.

  13. Phonon scattering in graphene over substrate steps

    SciTech Connect

    Sevinçli, H.; Brandbyge, M.

    2014-10-13

    We calculate the effect on phonon transport of substrate-induced bends in graphene. We consider bending induced by an abrupt kink in the substrate, and provide results for different step-heights and substrate interaction strengths. We find that individual substrate steps reduce thermal conductance in the range between 5% and 47%. We also consider the transmission across linear kinks formed by adsorption of atomic hydrogen at the bends and find that individual kinks suppress thermal conduction substantially, especially at high temperatures. Our analysis show that substrate irregularities can be detrimental for thermal conduction even for small step heights.

  14. Preliminary steps to the Atomic Energy Commission

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    on December 2, 1942 - on a squash court situated beneath the University of Chicago's football stadium. The next step was to demonstrate that a full scale reactor could in fact be...

  15. Step-out Well | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    step-out well should be drilled where there is some evidence of a permeable formation linked with the main reservoir. The well should be drilled in a location to where if it is an...

  16. Prabhat Steps In as DAS Group Lead

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Prabhat Steps In as DAS Group Lead Prabhat Steps In as DAS Group Lead September 1, 2014 prabhat Prabhat has been named Group Lead of the Data and Analytics Services (DAS) Group at the Department of Energy's National Energy Research Scientific Computing Center (NERSC). The DAS group helps NERSC's users address data and analytics challenges arising from the increasing size and complexity of data from simulations and experiments. As the DAS Group Lead, Prabhat will play a key role in developing and

  17. STEP Energy Coach and Technical Consultant Job Descriptions

    Energy.gov [DOE]

    STEP Energy Coach and Technical Consultant Job Descriptions, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  18. Component Repair Times Obtained from MSPI Data

    SciTech Connect

    Eide, Steven A.

    2015-05-01

    Information concerning times to repair or restore equipment to service given a failure is valuable to probabilistic risk assessments (PRAs). Examples of such uses in modern PRAs include estimation of the probability of failing to restore a failed component within a specified time period (typically tied to recovering a mitigating system before core damage occurs at nuclear power plants) and the determination of mission times for support system initiating event (SSIE) fault tree models. Information on equipment repair or restoration times applicable to PRA modeling is limited and dated for U.S. commercial nuclear power plants. However, the Mitigating Systems Performance Index (MSPI) program covering all U.S. commercial nuclear power plants provides up-to-date information on restoration times for a limited set of component types. This paper describes the MSPI program data available and analyzes the data to obtain median and mean component restoration times as well as non-restoration cumulative probability curves. The MSPI program provides guidance for monitoring both planned and unplanned outages of trains of selected mitigating systems deemed important to safety. For systems included within the MSPI program, plants monitor both train UA and component unreliability (UR) against baseline values. If the combined system UA and UR increases sufficiently above established baseline results (converted to an estimated change in core damage frequency or CDF), a “white” (or worse) indicator is generated for that system. That in turn results in increased oversight by the US Nuclear Regulatory Commission (NRC) and can impact a plant’s insurance rating. Therefore, there is pressure to return MSPI program components to service as soon as possible after a failure occurs. Three sets of unplanned outages might be used to determine the component repair durations desired in this article: all unplanned outages for the train type that includes the component of interest, only

  19. Community Energy Strategic Planning - Step 5 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    5 Community Energy Strategic Planning - Step 5 This presentation provides Step 5 to the Community Energy Strategic Planning approach, Develop Energy Goals and Strategies. Community Energy Strategic Planning - Step 5- Summary Presentation (6.27 MB) More Documents & Publications Community Energy Strategic Planning - Step 7 Community Energy Strategic Planning - Step 8 Community Energy Strategic Planning - Step 10

  20. Step-By-Step Guide for Waste Handling at WIPP - Fact Sheet

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    the nation's nuclear waste disposal problem Step-By-Step Guide for Waste Handling at WIPP The handling and disposal of contact-handled transuranic waste at the Waste Isolation Pilot Plant (WIPP) involves a series of steps. The following is an overview of those steps. Ž A waste shipment arrives at the WIPP by tractor-trailer. Each tractor-trailer is capable of carrying up to three Transuranic Packaging Transporter Model IIs (TRUPACT-IIs) or HalfPACT's. Ž Upon arrival the tractor trailer and

  1. Community Energy Strategic Planning - Step 8

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Speaking Points: An implementaHon blueprint sets out detailed informaHon to put the final CESP acHons in place, including who will be responsible for each acHon, what the specific deliverables will be, and when they will be accomplished. It also incorporates conclusions from the finance strategy (Step 7) and the plan to do ongoing monitoring and evaluaHon (Step 9). The implementaHon blueprint will be integrated in the Final CESP Report and can also be used as a standalone document in the

  2. Institutional Change Process Step 1: Determine Goals

    Office of Energy Efficiency and Renewable Energy (EERE)

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

  3. Step 1: Determine Goals for Institutional Change

    Office of Energy Efficiency and Renewable Energy (EERE)

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

  4. Community Energy Strategic Planning - Step 10 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    0 Community Energy Strategic Planning - Step 10 This presentation provides Step 10 to the Community Energy Strategic Planning approach, Develop, Adopt, and Publicize the CESP. Community Energy Strategic Planning- Step 10- Summary Presentation (3.73 MB) More Documents & Publications Smart Grid Overview Community Energy Strategic Planning - Step 8 Community Energy Strategic Planning - Step 9

  5. Community Energy Strategic Planning - Step 2 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    2 Community Energy Strategic Planning - Step 2 This presentation provides Step 2 to the Community Energy Strategic Planning approach, Identify and Engage Stakeholders. Step 2: Identify and Engage Stakeholder (4.01 MB) More Documents & Publications Tool 0.1: CESP Planning Worksheet Guide to Community Energy Strategic Planning: Step 8 Guide to Community Energy Strategic Planning: Step 2

  6. Community Energy Strategic Planning - Step 3 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    3 Community Energy Strategic Planning - Step 3 This presentation provides Step 3 to the Community Energy Strategic Planning approach, Develop an Energy Vision. Community Energy Strategic Planning: Step 3- Summary Presentation (2.87 MB) More Documents & Publications Community Energy Strategic Planning - Step 6 Community Energy Strategic Planning - Introduction Community Energy Strategic Planning - Step 5

  7. Community Energy Strategic Planning - Step 6 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    6 Community Energy Strategic Planning - Step 6 This presentation provides Step 6 to the Community Energy Strategic Planning approach, Identify and Prioritize Actions. Community Energy Strategic Planning: Step 6- Summary Presentation (5.64 MB) More Documents & Publications Community Energy Strategic Planning - Step 3 Community Energy Strategic Planning - Introduction Community Energy Strategic Planning - Step 5

  8. Guide to Community Energy Strategic Planning: Step 10 | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    0 Guide to Community Energy Strategic Planning: Step 10 U.S. Department of Energy (DOE) ... This links to Step 10. PDF icon Guide to Community Energy Strategic Planning: Step 10- ...

  9. Guide to Community Energy Strategic Planning: Step 8 | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    8 Guide to Community Energy Strategic Planning: Step 8 U.S. Department of Energy (DOE) ... This links to Step 8. PDF icon Guide to Community Energy Strategic Planning: Step 8- Full ...

  10. Guide to Community Energy Strategic Planning: Step

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    -1 March 2013 WHAT: The first critical step is putting in place a strong Leadership Team once the development of a community energy strategic plan (CESP) has been officially authorized (see Introduction). WHY: To drive the process to successful completion it is necessary to establish a committee that includes leaders who will:  Maintain continued focus on the CESP process.  Connect the government offices necessary for success.  Motivate key stakeholders to contribute to the plan. 

  11. Agencies, Hoping to Deflect Comets and Asteroids, Step Up Earth...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Agencies, Hoping to Deflect Comets and Asteroids, Step Up Earth Defense Agencies, Hoping to Deflect Comets and Asteroids, Step Up Earth Defense In grappling with the threat of ...

  12. A Critical Step Toward Sustainable Nuclear Fuel Disposal | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    A Critical Step Toward Sustainable Nuclear Fuel Disposal A Critical Step Toward Sustainable Nuclear Fuel Disposal January 26, 2012 - 2:30pm Addthis Secretary Chu Secretary Chu...

  13. Seismic Monitoring a Critical Step in EGS Development | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Seismic Monitoring a Critical Step in EGS Development Seismic Monitoring a Critical Step in EGS Development December 3, 2013 - 1:33pm Addthis The Energy Department's Sandia ...

  14. Guide to Community Energy Strategic Planning: Step 2 | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Guide to Community Energy Strategic Planning: Step 2 Guide to Community Energy Strategic Planning: Step 2 U.S. Department of Energy (DOE) Technical Assistance Program (TAP)...

  15. Smart Grid Outreach and Communication Strategy: Next Steps -...

    Office of Environmental Management (EM)

    Outreach and Communication Strategy: Next Steps - EAC Recommendations for the Department of Energy (October 17, 2012) Smart Grid Outreach and Communication Strategy: Next Steps - ...

  16. Obama Administration Takes Major Step toward Advanced Vehicles...

    Office of Environmental Management (EM)

    Takes Major Step toward Advanced Vehicles with New Fleet Management Practices and Launch of First Federal Electric Vehicle Pilot Obama Administration Takes Major Step toward ...

  17. Saratoga Technology Energy Park STEP | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Technology Energy Park STEP Jump to: navigation, search Name: Saratoga Technology + Energy Park (STEP) Place: Malta, New York Product: An economic development project of the New...

  18. Integrated calibration sphere and calibration step fixture for...

    Office of Scientific and Technical Information (OSTI)

    Integrated calibration sphere and calibration step fixture for improved coordinate measurement machine calibration Title: Integrated calibration sphere and calibration step fixture ...

  19. The Five-Step Development Process Step 1: Identify Project Potential

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    1: Identify Project Potential Presentation Agenda * Brief Review of Day 1 * Step 1: Identifying Project Potential - Community Market Potential - Resource Potential - Initial Site Considerations * Tools and Resources * Small Group Exercise/Discussion 2 1 Potential 5 Operations & Maintenance 4 Implementation 3 Refinement 2 Options 1 Potential 3 Potential Options Refinement Implementation Operations and Maintenance Step 1: Site, Scale, Resource, and Community Market Potential Purpose: Determine

  20. Richard Gerber! NERSC User Services Next Steps

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Next Steps --- 1 --- September 10, 2013 Explore the NERSC Web Site * "For U sers" S ec5on - Documenta-on - Announcements - Training - My N ERSC - Job L ogs a nd A naly-cs - Help * Live Status - MOTD, O utages, J ob Q ueues * Events --- 2 --- Help Desk * Online - hGps://help.nersc.gov/ - Submit, u pdate, a nd r eview t rouble - ckets - Submit q uota i ncrease f orms * Email - consult@nersc.gov - accounts@nersc.gov * Phone - 1---800---666---3772 ( 1---800---66---NERSC) - Consultants 8

  1. Community Energy Strategic Planning - Step 7 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    7 Community Energy Strategic Planning - Step 7 This presentation provides Step 7 to the Community Energy Strategic Planning approach, Put Together a Financing Strategy. Community Energy Strategic Planning - Step 7- Summary Presentation (3.63 MB) More Documents & Publications Community Energy Strategic Planning - Step 8 EA-0984: Finding of No Significant Impact

  2. Community Energy Strategic Planning - Step 9 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    9 Community Energy Strategic Planning - Step 9 This presentation provides Step 9 to the Community Energy Strategic Planning approach, Plan to Elevate. Community Energy Strategic Planning - Step 9- Summary Presentation (5.59 MB) More Documents & Publications 2015 Reliability & Markets Peer Review - Day 2 Presentations Community Energy Strategic Planning - Step 10 Thermal Cycling Combined with Dynamic Mechanical Load: Preliminary Report

  3. Action Steps for a Cooperative Research and Development Agreement (CRADA)

    Energy.gov [DOE]

    An outline of the steps that DOE laboratories and industry partners fulfill when undertaking projects together.

  4. Multiple time step integrators in ab initio molecular dynamics

    SciTech Connect

    Luehr, Nathan; Martínez, Todd J.; Markland, Thomas E.

    2014-02-28

    Multiple time-scale algorithms exploit the natural separation of time-scales in chemical systems to greatly accelerate the efficiency of molecular dynamics simulations. Although the utility of these methods in systems where the interactions are described by empirical potentials is now well established, their application to ab initio molecular dynamics calculations has been limited by difficulties associated with splitting the ab initio potential into fast and slowly varying components. Here we present two schemes that enable efficient time-scale separation in ab initio calculations: one based on fragment decomposition and the other on range separation of the Coulomb operator in the electronic Hamiltonian. We demonstrate for both water clusters and a solvated hydroxide ion that multiple time-scale molecular dynamics allows for outer time steps of 2.5 fs, which are as large as those obtained when such schemes are applied to empirical potentials, while still allowing for bonds to be broken and reformed throughout the dynamics. This permits computational speedups of up to 4.4x, compared to standard Born-Oppenheimer ab initio molecular dynamics with a 0.5 fs time step, while maintaining the same energy conservation and accuracy.

  5. Gold Medal Approaches for Obtaining and Using Energy Efficiency...

    Office of Environmental Management (EM)

    Gold Medal Approaches for Obtaining and Using Energy Efficiency Data (101) Gold Medal Approaches for Obtaining and Using Energy Efficiency Data (101) August 11, 2016 1:00PM to ...

  6. Tritium Issues in Next Step Devices

    SciTech Connect

    C.H. Skinner; G. Federici

    2001-09-05

    Tritium issues will play a central role in the performance and operation of next-step deuterium-tritium (DT) burning plasma tokamaks and the safety aspects associated with tritium will attract intense public scrutiny. The orders-of-magnitude increase in duty cycle and stored energy will be a much larger change than the increase in plasma performance necessary to achieve high fusion gain and ignition. Erosion of plasma-facing components will scale up with the pulse length from being barely measurable on existing machines to centimeter scale. Magnetic Fusion Energy (MFE) devices with carbon plasma-facing components will accumulate tritium by co-deposition with the eroded carbon and this will strongly constrain plasma operations. We report on a novel laser-based method to remove co-deposited tritium from carbon plasma-facing components in tokamaks. A major fraction of the tritium trapped in a co-deposited layer during the deuterium-tritium (DT) campaign on the Tokamak Fusion Test Reactor (TFTR) was released by heating with a scanning laser beam. This technique offers the potential for tritium removal in a next-step DT device without the use of oxidation and the associated deconditioning of the plasma-facing surfaces and expense of processing large quantities of tritium oxide. The operational lifetime of alternative materials such as tungsten has significant uncertainties due to melt layer loss during disruptions. Production of dust and flakes will need careful monitoring and minimization, and control and accountancy of the tritium inventory will be critical issues. Many of the tritium issues in Inertial Fusion Energy (IFE) are similar to MFE, but some, for example those associated with the target factory, are unique to IFE. The plasma-edge region in a tokamak has greater complexity than the core due to lack of poloidal symmetry and nonlinear feedback between the plasma and wall. Sparse diagnostic coverage and low dedicated experimental run time has hampered the

  7. Obama Officials Announce Steps to Promote the Clean Energy Potential...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Obama Officials Announce Steps to Promote the Clean Energy Potential of the West Obama Officials Announce Steps to Promote the Clean Energy Potential of the West June 15, 2009 -...

  8. EPA, DOE Announce New Steps to Strengthen ENERGY STAR | Department...

    Office of Environmental Management (EM)

    EPA, DOE Announce New Steps to Strengthen ENERGY STAR EPA, DOE Announce New Steps to Strengthen ENERGY STAR March 19, 2010 - 12:00am Addthis WASHINGTON - The U.S. Environmental ...

  9. Tool Kit Framework: Small Town Energy Program (STEP)

    Energy.gov [DOE]

    The goal of Tool Kit Framework: Small Town University Energy Program (STEP) is to assemble all the key elements that went into the design and delivery of STEP—formerly STEP-UP, a University Park,...

  10. Secretary Chu Announces Major Steps to Green The Federal Fleet...

    Energy Saver

    Major Steps to Green The Federal Fleet Secretary Chu Announces Major Steps to Green The Federal Fleet May 24, 2011 - 1:00pm Addthis John Schueler John Schueler Former New Media ...

  11. University Park, Maryland, Plans to STEP Into New Communities | Department

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    of Energy University Park, Maryland, Plans to STEP Into New Communities University Park, Maryland, Plans to STEP Into New Communities Photo of three brick buildings with flowering trees around them. Based on its success in University Park, Maryland, the Small Town Energy Program for University Park (STEP-UP) is expanding into surrounding communities to demonstrate that the program is replicable and scalable beyond University Park. In just a few weeks, the rebranded "STEP" program

  12. Policy Flash 2013-24 Fee Determinations: Requirement to Obtain...

    Energy.gov [DOE] (indexed site)

    Requirement to Obtain Acquisition Executive's Input. Questions concerning this policy flash should be directed to Michael Righi of the Contract and Financial Assistance...

  13. Gold Medal Approaches for Obtaining and Using Energy Efficiency Data

    Office of Energy Efficiency and Renewable Energy (EERE)

    Better Buildings Residential Network Peer Exchange Call Series: Gold Medal Approaches for Obtaining and Using Energy Efficiency Data, call slides and discussion summary.

  14. Generator for gallium-68 and compositions obtained therefrom

    DOEpatents

    Neirinckx, Rudi D. (Medfield, MA); Davis, Michael A. (Westwood, MA)

    1981-01-01

    A generator for obtaining radioactive gallium-68 from germanium-68 bound in a resin containing unsubstituted phenolic hydroxyl groups. The germanium-68 is loaded into the resin from an aqueous solution of the germanium-68. A physiologically acceptable solution of gallium-68 having an activity of 0.1 to 50 millicuries per milliliter of gallium-68 solution is obtained. The solution is obtained from the bound germanium-68 which forms gallium-68 in situ by eluting the column with a hydrochloric acid solution to form an acidic solution of gallium-68. The acidic solution of gallium-68 can be neutralized.

  15. Wood-Polymer composites obtained by gamma irradiation

    SciTech Connect

    Gago, J.; Lopez, A.; Rodriguez, J.; Santiago, J.; Acevedo, M.

    2007-10-26

    In this work we impregnate three Peruvian woods (Calycophy spruceanum Be, Aniba amazonica Meiz and Hura crepitans L) with styrene-polyester resin and methyl methacrylate. The polymerization of the system was promoted by gamma radiation and the experimental optimal condition was obtained with styrene-polyester 1:1 and 15 kGy. The obtained composites show reduced water absorption and better mechanical properties compared to the original wood. The structure of the wood-polymer composites was studied by light microscopy. Water absorption and hardness were also obtained.

  16. Terra-Gen Powers Coso Geothermal Facility Obtains Critical Federal...

    OpenEI (Open Energy Information) [EERE & EIA]

    Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Terra-Gen Powers Coso Geothermal Facility Obtains Critical Federal Permit to Increase Its...

  17. An important challenge in magnetic fusion research is to obtain...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    control of edge transport barriers on Alcator C-Mod A crucial challenge in magnetic fusion is to obtain high energy confinement in a stationary plasma that is compatible with...

  18. Treatment of biomass to obtain a target chemical

    DOEpatents

    Dunson, Jr., James B.; Tucker, III, Melvin P.; Elander, Richard T.; Hennessey, Susan Marie

    2010-08-24

    Target chemicals were produced using biocatalysts that are able to ferment sugars derived from treated biomass. Sugars were obtained by pretreating biomass under conditions of high solids and low ammonia concentration, followed by saccharification.

  19. Method for localizing and isolating an errant process step

    DOEpatents

    Tobin, Jr., Kenneth W.; Karnowski, Thomas P.; Ferrell, Regina K.

    2003-01-01

    A method for localizing and isolating an errant process includes the steps of retrieving from a defect image database a selection of images each image having image content similar to image content extracted from a query image depicting a defect, each image in the selection having corresponding defect characterization data. A conditional probability distribution of the defect having occurred in a particular process step is derived from the defect characterization data. A process step as a highest probable source of the defect according to the derived conditional probability distribution is then identified. A method for process step defect identification includes the steps of characterizing anomalies in a product, the anomalies detected by an imaging system. A query image of a product defect is then acquired. A particular characterized anomaly is then correlated with the query image. An errant process step is then associated with the correlated image.

  20. Microstructure of room temperature ionic liquids at stepped graphite electrodes

    SciTech Connect

    Feng, Guang; Li, Song; Zhao, Wei; Cummings, Peter T.

    2015-07-14

    Molecular dynamics simulations of room temperature ionic liquid (RTIL) [emim][TFSI] at stepped graphite electrodes were performed to investigate the influence of the thickness of the electrode surface step on the microstructure of interfacial RTILs. A strong correlation was observed between the interfacial RTIL structure and the step thickness in electrode surface as well as the ion size. Specifically, when the step thickness is commensurate with ion size, the interfacial layering of cation/anion is more evident; whereas, the layering tends to be less defined when the step thickness is close to the half of ion size. Furthermore, two-dimensional microstructure of ion layers exhibits different patterns and alignments of counter-ion/co-ion lattice at neutral and charged electrodes. As the cation/anion layering could impose considerable effects on ion diffusion, the detailed information of interfacial RTILs at stepped graphite presented here would help to understand the molecular mechanism of RTIL-electrode interfaces in supercapacitors.

  1. Smart Grid Outreach and Communication Strategy: Next Steps - EAC

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Recommendations for the Department of Energy (October 17, 2012) | Department of Energy Outreach and Communication Strategy: Next Steps - EAC Recommendations for the Department of Energy (October 17, 2012) Smart Grid Outreach and Communication Strategy: Next Steps - EAC Recommendations for the Department of Energy (October 17, 2012) Smart Grid Outreach and Communication Strategy: Next Steps - EAC Recommendations for DOE Action, approved at the October 15-16, 2012 EAC Meeting. Smart Grid

  2. Institutional Change Process Step 5: Measure and Evaluate | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Institutional Change » Institutional Change Process Step 5: Measure and Evaluate Institutional Change Process Step 5: Measure and Evaluate Graphic of the Institutional Change Continuous Improvement Process gear. The steps begin with Determine Goals and move to Assess Institutional Rules, Roles and Tools then to Develop Action Plan then to Implement Plan then finally to Measure and Evaluate. The process begins again with Determine Goals. Determine Goals Develop Action Plan Implement

  3. POLICY GUIDANCE MEMORANDUM #38 EXCEPTION TO POLICY REGARDING QUALITY STEP

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    INCREASES | Department of Energy 8 EXCEPTION TO POLICY REGARDING QUALITY STEP INCREASES POLICY GUIDANCE MEMORANDUM #38 EXCEPTION TO POLICY REGARDING QUALITY STEP INCREASES This has been rescinded and incorporated into DOE Order 331.C admin change 3: regarding the discretionary approvals of Quality Step Increases (QSIs) and Quality Increases (QIs) when an employee received a Within Grade Increase (WGI) during the annual performance cycle. Policy Guidance Memo #38.pdf (203.32 KB) Responsible

  4. Department of Energy Announces Steps to Strengthen Enforcement of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Efficiency Standards | Department of Energy Strengthen Enforcement of Energy Efficiency Standards Department of Energy Announces Steps to Strengthen Enforcement of Energy Efficiency Standards October 13, 2009 - 12:00am Addthis Washington, DC - Today, the U.S. Department of Energy (DOE) announced three new steps to strengthen its ability to enforce energy efficiency standards. These new steps are part of the Department's ongoing effort to save energy for American consumers and businesses by

  5. Fast Company: Satellite imaging startup takes step forward

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Satellite imaging startup takes step forward Fast Company: Satellite imaging startup takes step forward A Los Alamos startup that uses satellite images to decipher changes on the Earth's surface has received a new round of venture capital. December 6, 2015 Fast Company covers "Just Your Typical New Mexico Image Recognition Startup Spun Off From A Government Lab" Agricultural corn yields mapped by Descartes Labs. From Descartes. Fast Company: Satellite imaging startup takes step forward

  6. Obama Administration Officials to Announce Major Steps toward Federal

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Advanced Vehicle Fleet | Department of Energy Major Steps toward Federal Advanced Vehicle Fleet Obama Administration Officials to Announce Major Steps toward Federal Advanced Vehicle Fleet May 23, 2011 - 12:00am Addthis WASHINGTON, DC - On May 24, 2011, U.S. Department of Energy Secretary Steven Chu, U.S. General Services Administrator Martha Johnson and White House Council on Environmental Quality Chair Nancy Sutley, will announce next steps in moving the Federal fleet further towards

  7. Community Energy Strategic Planning - Step 4 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    4 Community Energy Strategic Planning - Step 4 This presentation provides Step 4 to the Community Energy Strategic Planning approach, Assess the Current Energy Profile. Community Energy Strategic Planning: Step 4- Summary Presentation (9.2 MB) More Documents & Publications Overcoming Persistent Barriers to Energy Efficiency in Multifamily Housing through Partnerships Thermal Cycling Combined with Dynamic Mechanical Load: Preliminary Report U.S. Department of Energy Building Energy Data

  8. Step 5: Measure and Evaluate for Institutional Change

    Energy.gov [DOE]

    The measure and evaluation step is crucial to ensure that institutional change efforts produce successful results in meeting sustainability goals. To measure success, an evaluation is needed.

  9. Tool Kit Framework: Small Town University Energy Program (STEP)

    Energy.gov [DOE]

    Tool Kit Framework: Small Town University Energy Program (STEP), as posted on the U.S. Department of Energy's Better Buildings Neighborhood Program website.

  10. Design example: wedge stepping motor. (Conference) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    Citation Details In-Document Search Title: Design example: wedge stepping motor. No ... presentation at the Sandia MEMS Advanced Design Short Course held July 19, 2008 in ...

  11. Institutional Change Process Step 5: Measure and Evaluate | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Step 5: Measure and Evaluate Graphic showing 5 gears. ... Thoughtful program design and implementation using these ... FEMP Home About the Federal Energy Management Program Laws & ...

  12. Department of Energy Announces Steps to Help Modernize Natural...

    Energy Saver

    Help Modernize Natural Gas Infrastructure Department of Energy Announces Steps to Help Modernize Natural Gas Infrastructure July 29, 2014 - 3:58pm Addthis News Media Contact ...

  13. Material gain: Research a step toward more efficient solar panels |

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    MIT-Harvard Center for Excitonics Material gain: Research a step toward more efficient solar panels 10.7.2014

  14. 21 Steps to Improve Cyber Security of SCADA Networks | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    SCADA Networks 21 Steps to Improve Cyber Security of SCADA Networks Supervisory control ... natural gas, gasoline, water, waste treatment, transportation) to all Americans. ...

  15. Project Notebook - Makah Indian Nation "Next Steps to Implement...

    Energy.gov [DOE] (indexed site)

    Makah Indian Nation "Next Steps to Implement Pilot Power Project for Pacific Northwest Region" Project Overview Wind Power and Other Generation Wind Resource marginal Other ...

  16. Institutional Change Process Step 5: Measure and Evaluate

    Office of Energy Efficiency and Renewable Energy (EERE)

    The measure and evaluation step is crucial to ensure that institutional change efforts produce successful results in meeting sustainability goals. To measure success, an evaluation is needed.

  17. (U) modulator to provide a continuous stepped frequency signal format

    DOEpatents

    Walters, Glenn A.

    1991-01-01

    A modulator provides a continuous signal format composed of discrete freqcy steps and is designed to eliminate frequency overlap or smearing normally associated with filter ringing.

  18. Major next steps proposed for development of fusion energy based...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Major next steps proposed for development of fusion energy based on the spherical tokamak ... Mega Ampere Spherical Tokamak. Photo courtesy of Culham Centre for Fusion Energy. Mega ...

  19. DOE Announces Additional Steps in Developing Sustainable Biofuels...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    in Developing Sustainable Biofuels Industry DOE Announces Additional Steps in Developing Sustainable Biofuels Industry October 7, 2008 - 4:14pm Addthis Releases Results from...

  20. Single Step Manufacturing of Low Catalyst Loading Electrolyzer...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ... - Initial evaluation of single-step fabrication * Alternate Seal Design - Concepts have ... platform Page 21 Technical Accomplishments: Cathode RSDT Cathode Comparison CCM vs. ...

  1. Department of Energy Announces Steps to Strengthen Enforcement...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ... Media contact(s): (202) 586-4940 Addthis Related Articles DOE Announces Steps to Strengthen Enforcement of Energy Efficiency Standards DOE Requires Manufacturers to Halt Sales of ...

  2. Institutional Change Process Step 2: Assess Institutional Rules...

    Office of Environmental Management (EM)

    2: Assess Institutional Rules, Roles, and Tools Institutional Change Process Step 2: Assess Institutional Rules, Roles, and Tools Graphic of the Institutional Change Continuous ...

  3. Council on Environmental Quality - Steps to Modernize and Reinvigorate...

    OpenEI (Open Energy Information) [EERE & EIA]

    NEPA Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Council on Environmental Quality - Steps to Modernize and Reinvigorate NEPA Abstract This...

  4. The Steps of Weapons Production | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    This graphic provides an overview of the steps of weapons production beginning in 1943. PDF icon Fat Man and Little Boy: The first two production weapons More Documents & ...

  5. Tool Kit Framework: Small Town Energy Program (STEP) | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Tool Kit Framework: Small Town Energy Program (STEP) Tool Kit Framework: Small Town Energy ... Outreach Letters to Engage Partner Communities, Letters of Understanding * Letters ...

  6. Stories of Discovery & Innovation: A Step Toward Artificial Photosynth...

    Office of Science (SC)

    Publications History Contact BES Home 01.06.12 Stories of Discovery & Innovation: A Step ... This work, featured in the Office of Science's Stories of Discovery & Innovation, was ...

  7. Synthesized Topics for Potential Next Steps From August 2013...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Next Steps From August 2013 HSEP Committee Meeting 1. When trying to increase awareness of HAB members and their constituencies regarding the emergency preparedness plan...

  8. Keweenaw Bay Indian Community: 'First Steps' Toward Tribal Weatherizat...

    Energy.gov [DOE] (indexed site)

    Keweenaw Bay Indian Community 'First Steps' Toward Tribal Weatherization Human Capacity Building Denver, CO - October 29 th , 2010 Debra L. Picciano . CAP Administrator Federally ...

  9. First Steps Towards Tribal Weatherization: Human Capacity Development

    Energy.gov [DOE] (indexed site)

    Steps Towards tribal weatherization: human capacity development October 2010 - Cook Inlet Tribal Council Weatherization Apprenticeship March 2010 February 2012 Cook Inlet Tribal ...

  10. Methods for obtaining well-to-well flow communication

    SciTech Connect

    Harmon, R.A.; Wahl, H.A.

    1988-07-05

    A process is described for reducing uneven areal sweep of injection fluid in a well pattern having a central injection well surrounded by production wells, all of the wells being communicated by a fracture, comprising: (a) injecting fracturing fluid containing a proppant material into the central injection well and into the fracture to prop the fracture adjacent the injection well; (b) simultaneous with step (a), injecting fluid into one or more of the production wells toward which it is desired to reduce the flow of injection fluid, thereby causing a greater portion of the proppant material to be placed in the fracture adjacent the central injection well in directions away from the one or more of the production wells toward which it is desired to reduce the flow of injection fluid; and (c) thereby subsequently reducing uneven areal sweep of injection fluid injected into the central injection well at rates and pressures below those required to part the fracture.

  11. Fee Determinations: Requirement to Obtain Acquisition Executive's Input

    Energy.gov [DOE]

    On January 28, 2013, the Deputy Secretary issued the attached memorandum to the Department's senior officials requiring any Fee Determining Official whose contract falls under the cognizance of an Acquisition Executive to brief and obtain the input of that Acquisition Executive before determining earned fee under the contract.

  12. METHOD FOR OBTAINING PLUTONIUM METAL FROM ITS TRICHLORIDE

    DOEpatents

    Reavis, J.G.; Leary, J.A.; Maraman, W.J.

    1962-08-14

    A method was developed for obtaining plutonium metal by direct reduction of plutonium chloride, without the use of a booster, using calcium and lanthamum as a reductant, the said reduction being carried out at temperature in the range of 700 to 850 deg C and at about atmospheric pressure. (AEC)

  13. Small Town Energy Program (STEP) Final Report revised

    SciTech Connect

    Wilson, Charles T.

    2014-01-02

    University Park, Maryland (“UP”) is a small town of 2,540 residents, 919 homes, 2 churches, 1 school, 1 town hall, and 1 breakthrough community energy efficiency initiative: the Small Town Energy Program (“STEP”). STEP was developed with a mission to “create a model community energy transformation program that serves as a roadmap for other small towns across the U.S.” STEP first launched in January 2011 in UP and expanded in July 2012 to the neighboring communities of Hyattsville, Riverdale Park, and College Heights Estates, MD. STEP, which concluded in July 2013, was generously supported by a grant from the U.S. Department of Energy (DOE). The STEP model was designed for replication in other resource-constrained small towns similar to University Park - a sector largely neglected to date in federal and state energy efficiency programs. STEP provided a full suite of activities for replication, including: energy audits and retrofits for residential buildings, financial incentives, a community-based social marketing backbone and local community delivery partners. STEP also included the highly innovative use of an “Energy Coach” who worked one-on-one with clients throughout the program. Please see www.smalltownenergy.org for more information. In less than three years, STEP achieved the following results in University Park: • 30% of community households participated voluntarily in STEP; • 25% of homes received a Home Performance with ENERGY STAR assessment; • 16% of households made energy efficiency improvements to their home; • 64% of households proceeded with an upgrade after their assessment; • 9 Full Time Equivalent jobs were created or retained, and 39 contractors worked on STEP over the course of the project. Estimated Energy Savings - Program Totals kWh Electricity 204,407 Therms Natural Gas 24,800 Gallons of Oil 2,581 Total Estimated MMBTU Saved (Source Energy) 5,474 Total Estimated Annual Energy Cost Savings $61,343 STEP clients who

  14. Material to Efficiently and Economically Obtain Microorganism and

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Microalgae - Energy Innovation Portal Biomass and Biofuels Biomass and Biofuels Advanced Materials Advanced Materials Find More Like This Return to Search Material to Efficiently and Economically Obtain Microorganism and Microalgae Ames Laboratory Contact AMES About This Technology Technology Marketing SummaryTechnology provides an economical and efficient process to harvest microorganisms like microalgae from its growth media.Description The interest in using algae as feedstock for biofuel

  15. Simplified Helium Refrigerator Cycle Analysis Using the `Carnot Step'

    SciTech Connect

    P. Knudsen; V. Ganni

    2006-05-01

    An analysis of the Claude form of an idealized helium liquefier for the minimum input work reveals the ''Carnot Step'' for helium refrigerator cycles. As the ''Carnot Step'' for a multi-stage polytropic compression process consists of equal pressure ratio stages; similarly for an idealized helium liquefier the ''Carnot Step'' consists of equal temperature ratio stages for a given number of expansion stages. This paper presents the analytical basis and some useful equations for the preliminary examination of existing and new Claude helium refrigeration cycles.

  16. Three-step H-P adaptve strategy for the incompressible Navier-Stokes equations

    SciTech Connect

    Oden, J.T.; Wu, W.; Ainsworth, M.

    1995-12-31

    Recently, a reliable a posteriori error estimate was developed, mainly based on the element residual method, for a class of steady state incompressible Navier-Stokes equations. In this paper, using this error estimate, a three-step h-p adaptive strategy is developed to solve incompressible flow problems. The goal of developing an h-p adaptive strategy is to obtain accurate approximate solutions while minimizing computational costs. The basic idea of the three-step h-p adaptive strategy is to solve for the system on the three consecutive meshes, i.e. an initial mesh, an intermediate h-p adaptive mesh, and a final h-p adaptive mesh. Each new adaptive mesh is obtained by estimating the error on the previous mesh and executing a single h- or p- refinement procedure on the previous mesh according to the results of the adaptive strategy. Numerical results indicate that the proposed three-step adaptive strategy produces accurate solutions while keeping the total computational costs under control.

  17. How to obtain the National Energy Modeling System (NEMS)

    Reports and Publications

    2013-01-01

    The National Energy Modeling System (NEMS) NEMS is used by the modelers at the U. S. Energy Information Administration (EIA) who understand its structure and programming. NEMS has only been used by a few organizations outside of the EIA, because most people that requested NEMS found out that it was too difficult or rigid to use. NEMS is not typically used for state-level analysis and is poorly suited for application to other countries. However, many do obtain the model simply to use the data in its input files or to examine the source code.

  18. Critical current of the dispersion superconducting phase, obtained during aging

    SciTech Connect

    Romanov, Y.P.; Smirnov, L.V.; Sadovskiy, V.D.; Volkenshteyn, N.V.

    1983-12-01

    High critical parameters of plastic superconductors on a base of solid solutions are obtained as a result of plastic deformation and heat treatment. At the same time, the critical current and field of monocrystalline samples turn out to be significantly lower. The preservation of superconducting in high magnetic fields is conditioned by the presence of a dense network of very thin intersecting filaments, which remain superconducting during the conversion of the main mass of the material into the normal state with the help of an electron microscope. A lamellar threddike structure was determined which was conditioned by plastic deformation and the breakdown of a solid solution.

  19. Illinois CO2 Injection Project Moves Another Step Forward

    Energy.gov [DOE]

    The recent completion of a three-dimensional (3-D) seismic survey at a large Illinois carbon dioxide injection test site is an important step forward for the carbon capture and storage project's planned early 2011 startup.

  20. DOE Announces Steps to Strengthen Enforcement of Energy Efficiency Standards

    Energy.gov [DOE]

    Washington, DC - Today, the U.S. Department of Energy (DOE) announced three new steps to strengthen its ability to enforce energy efficiency standards.  For more information, see the full press...

  1. Guide to Community Energy Strategic Planning: Step 1

    Energy.gov [DOE]

    U.S. Department of Energy (DOE) Technical Assistance Program (TAP) Solution Center publishes this strategic energy planning guide for state and local governments. This links to Step 1.

  2. New Steps to Strengthen the Nation's Energy Infrastructure |...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    That's why the President is taking steady, responsible steps to cut greenhouse gas pollution to protect our kids' health and begin to slow the effects of climate change, leaving a ...

  3. NREL: Wind Research - One Step Closer to the Marketplace for...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    One Step Closer to the Marketplace for State-of-the-Art Wind Turbine Drivetrain Photo of ... drivetrain-the components of a wind turbine that convert the rotational energy of the ...

  4. Guide to Community Energy Strategic Planning: Step 5

    Energy.gov [DOE]

    U.S. Department of Energy (DOE) Technical Assistance Program (TAP) Solution Center publishes this strategic energy planning guide for state and local governments. This links to Step 5.

  5. Guide to Community Energy Strategic Planning: Step 2

    Energy.gov [DOE]

    U.S. Department of Energy (DOE) Technical Assistance Program (TAP) Solution Center publishes this strategic energy planning guide for state and local governments. This links to Step 2.

  6. Transcript of First Steps Toward Developing Renewable Energy...

    Energy Saver

    Transcript of First Steps Toward Developing Renewable Energy and Energy Efficiency on Tribal ... The cost share must come from non-Federal sources unless otherwise allowed by law. I ...

  7. Next Steps for the FCEV Learning Demonstration Project (Presentation)

    SciTech Connect

    Wipke, K.; Sprik, S.; Kurtz, J.; Ramsden, T.; Ainscough, C.; Saur, G.

    2011-02-01

    This presentation summarizes project goals; vehicle and H2 station deployment status, critical performance compared to targets; highlights of latest vehicle and infrastructure analysis results and progress; learning demo next steps; highlights of partner activities and summary.

  8. Guide to Community Energy Strategic Planning: Step 3

    Energy.gov [DOE]

    U.S. Department of Energy (DOE) Technical Assistance Program (TAP) Solution Center publishes this strategic energy planning guide for state and local governments. This links to Step 3.

  9. Montgomery to Step Down as Jefferson Lab Director | Jefferson Lab

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Montgomery to Step Down as Jefferson Lab Director External Link: http://www6.sura.org/wp-content/uploads/2016/01/JSAMont12216Final.pdf By dchopard on Sat, 2016-01-23 18:5

  10. STEP 1: TO BE COMPLETED BY ALCOHOL TECHNICIAN

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Technician: BAT Device: SALIVA BREATH* 15-Minute Wait: YES NO Screening Test: (For BREATH ... required in this step and checks the type of device (saliva or breath) being used. ...

  11. Guide to Community Energy Strategic Planning: Step 7

    Energy.gov [DOE]

    U.S. Department of Energy (DOE) Technical Assistance Program (TAP) Solution Center publishes this strategic energy planning guide for state and local governments. This links to Step 7.

  12. Guide to Community Energy Strategic Planning: Step 9

    Energy.gov [DOE]

    U.S. Department of Energy (DOE) Technical Assistance Program (TAP) Solution Center publishes this strategic energy planning guide for state and local governments. This links to Step 9.

  13. Stories of Discovery & Innovation: A Step Toward Artificial Photosynthesis

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    | U.S. DOE Office of Science (SC) A Step Toward Artificial Photosynthesis Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events EFRC News EFRC Events DOE Announcements Publications History Contact BES Home 01.06.12 Stories of Discovery & Innovation: A Step Toward Artificial Photosynthesis Print Text Size: A A A Subscribe FeedbackShare Page EFRC researchers construct an artificial version of a bacterium's light-absorbing

  14. Energy Department Announces Progress, Next Steps on Improving the

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Reliability of the Nation's Electric Grid with Synchrophasor Technology | Department of Energy Announces Progress, Next Steps on Improving the Reliability of the Nation's Electric Grid with Synchrophasor Technology Energy Department Announces Progress, Next Steps on Improving the Reliability of the Nation's Electric Grid with Synchrophasor Technology March 22, 2016 - 12:07pm Addthis Washington, DC - Today, as the first-ever International Synchrophasor Symposium continues in Atlanta, GA, the

  15. Institutional Change Process Step 1: Determine Goals | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    1: Determine Goals Institutional Change Process Step 1: Determine Goals Graphic of the Institutional Change Continuous Improvement Process gear. The steps begin with Determine Goals and move to Assess Institutional Rules, Roles and Tools then to Develop Action Plan then to Implement Plan then finally to Measure and Evaluate. The process begins again with Determine Goals. Determine Goals Develop Action Plan Implement Plan Measure and Evaluate Assess Institutional Rules, Roles and Tools The first

  16. Institutional Change Process Step 2: Assess Institutional Rules, Roles, and

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Tools | Department of Energy 2: Assess Institutional Rules, Roles, and Tools Institutional Change Process Step 2: Assess Institutional Rules, Roles, and Tools Graphic of the Institutional Change Continuous Improvement Process gear. The steps begin with Determine Goals and move to Assess Institutional Rules, Roles and Tools then to Develop Action Plan then to Implement Plan then finally to Measure and Evaluate. The process begins again with Determine Goals. Determine Goals Develop Action Plan

  17. Institutional Change Process Step 4: Implement an Action Plan | Department

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    of Energy 4: Implement an Action Plan Institutional Change Process Step 4: Implement an Action Plan Graphic of the Institutional Change Continuous Improvement Process gear. The steps begin with Determine Goals and move to Assess Institutional Rules, Roles and Tools then to Develop Action Plan then to Implement Plan then finally to Measure and Evaluate. The process begins again with Determine Goals. Determine Goals Develop Action Plan Implement Plan Measure and Evaluate Assess Institutional

  18. Fort Peck Tribes - First Steps Towards Renewable Energy Development

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Tribes "First Steps Towards Renewable Energy Development" Presentation to the Presentation to the Tribal Energy Program Tribal Energy Program Denver, CO Denver, CO Eric Bruguier Tribal Executive Board Member Poplar, MT (406) 768 - 8319 October 20, 2005 October 20, 2005 Presentation Overview Project Overview Project Location Project Background Project Participants Project Activities Requested Technical Support Project Overview Requested the "First Steps" grant to complete: 1.

  19. Obama Administration Takes Major Step toward Advanced Vehicles with New

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Fleet Management Practices and Launch of First Federal Electric Vehicle Pilot | Department of Energy Takes Major Step toward Advanced Vehicles with New Fleet Management Practices and Launch of First Federal Electric Vehicle Pilot Obama Administration Takes Major Step toward Advanced Vehicles with New Fleet Management Practices and Launch of First Federal Electric Vehicle Pilot May 24, 2011 - 12:00am Addthis WASHINGTON, DC - Today, Secretary of Energy Steven Chu, General Services

  20. An Important Step Forward for CCUS | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    An Important Step Forward for CCUS An Important Step Forward for CCUS November 20, 2012 - 1:29pm Addthis Schlumberger technicians and rig crew lowering monitoring instrumentation into a well. | Photo credit to the Illinois State Geological Survey. Schlumberger technicians and rig crew lowering monitoring instrumentation into a well. | Photo credit to the Illinois State Geological Survey. Thomas Johnson Technical Writer for the Office of Fossil Energy What are the key facts? CCUS has been widely

  1. Selective dissolution of halide perovskites as a step towards recycling

    Office of Scientific and Technical Information (OSTI)

    solar cells (Journal Article) | DOE PAGES Selective dissolution of halide perovskites as a step towards recycling solar cells Title: Selective dissolution of halide perovskites as a step towards recycling solar cells Most research on perovskite solar cells has focused on improving power-conversion efficiency and stability. However, if one could refurbish perovskite solar cells, their stability might not be a critical issue. From the perspective of cost effectiveness, if failed, perovskite

  2. Single Step Electrode Infiltration Process - Energy Innovation Portal

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Advanced Materials Advanced Materials Find More Like This Return to Search Single Step Electrode Infiltration Process National Energy Technology Laboratory Contact NETL About This Technology Technology Marketing Summary Research is active on the patent pending technology titled, "Method of Forming Catalyst Layer by Single Step Infiltration." This invention is available for licensing and/or further collaborative research from the U.S. Department of Energy's National Energy Technology

  3. PPPL Director Stewart Prager Steps Down | Princeton Plasma Physics Lab

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Director Stewart Prager Steps Down By Larry Bernard September 26, 2016 Tweet Widget Google Plus One Share on Facebook Stewart Prager (Photo by Elle Starkman/PPPL Office of Communications) Stewart Prager PRINCETON, New Jersey (Sept. 26, 2016) - Prof. Stewart Prager, a world renowned plasma physicist and passionate voice for a future of clean, abundant and benign energy fueled by fusion, has stepped down today from directorship of the national laboratory he has headed for the last eight years.

  4. Moab Uranium Mill Tailings Cleanup Project Steps into Spotlight at

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    International Meeting in Vienna | Department of Energy Uranium Mill Tailings Cleanup Project Steps into Spotlight at International Meeting in Vienna Moab Uranium Mill Tailings Cleanup Project Steps into Spotlight at International Meeting in Vienna October 22, 2012 - 12:00pm Addthis Moab Federal Project Director Donald Metzler presents at the Uranium Mining Remediation Exchange Group meeting in Germany in September 2011. Moab Federal Project Director Donald Metzler presents at the Uranium

  5. DOE Announces Additional Steps in Developing Sustainable Biofuels Industry

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    | Department of Energy Steps in Developing Sustainable Biofuels Industry DOE Announces Additional Steps in Developing Sustainable Biofuels Industry October 7, 2008 - 4:14pm Addthis Releases Results from Preliminary Intermediate Blends Report, Continues Commitment of Commercial Scale Biorefinery, Announces $7 Million for New Biofuels Projects WASHINGTON - Secretary of Energy Samuel W. Bodman and Secretary of Agriculture Ed Schafer today released the National Biofuels Action Plan (NBAP). The

  6. Growth of Quantum Wires on Step-Bunched Substrate

    SciTech Connect

    Liu, Feng

    2005-02-01

    This proposal initiates a combined theoretical and experimental multidisciplinary research effort to explore a novel approach for growing metallic and magnetic nanowires on step-bunched semiconductor and dielectric substrates, and to lay the groundwork for understanding the growth mechanisms and the electronic, electrical, and magnetic properties of metallic and magnetic nanowires. The research will focus on four topics: (1) fundamental studies of step bunching and self-organization in a strained thin film for creating step-bunched substrates. (2) Interaction between metal adatoms (Al,Cu, and Ni) and semiconductor (Si and SiGe) and dielectric (CaF2) surface steps. (3) growth and characterization of metallic and magnetic nanowires on step-bunched templates. (4) fabrication of superlattices of nanowires by growing multilayer films. We propose to attack these problems at both a microscopic and macroscopic level, using state-of-the-art theoretical and experimental techniques. Multiscale (electronic-atomic-continuum) theories will be applied to investigate growth mechanisms of nanowires: mesoscopic modeling and simulation of step flow growth of strained thin films, in particular, step bunching and self-organization will be carried out within the framework of continuum linear elastic theory; atomistic calculation of interaction between metal adatoms and semiconductor and dielectric surface steps will be done by large-scale computations using first-principles total-energy methods. In parallel, thin films and nanowires will be grown by molecular beam epitaxy (MBE), and the resultant structure and morphology will be characterized at the atomic level up to micrometer range, using a combination of different surface/interface probes, including scanning tunneling microscopy (STM, atomic resolution), atomic force microscopy (AFM, nanometer resolution), low-energy electron microscopy (LEEM, micrometer resolution), reflectance high-energy electron diffraction (RHEED), and x

  7. Selective dissolution of halide perovskites as a step towards recycling

    Office of Scientific and Technical Information (OSTI)

    solar cells (Journal Article) | SciTech Connect Selective dissolution of halide perovskites as a step towards recycling solar cells Citation Details In-Document Search Title: Selective dissolution of halide perovskites as a step towards recycling solar cells Most research on perovskite solar cells has focused on improving power-conversion efficiency and stability. However, if one could refurbish perovskite solar cells, their stability might not be a critical issue. From the perspective of

  8. Guide to Community Energy Strategic Planning: Step 8

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    8-1 March 2013 WHAT: An implementation blueprint sets out detailed information to put the final CESP actions in place, including who will be responsible for each action, what the specific deliverables will be, and when they will be accomplished. It also incorporates conclusions from the finance strategy (Step 7) and the plan to do ongoing monitoring and evaluation (Step 9). The implementation blueprint will be integrated in the Final CESP Report and can also be used as a standalone document in

  9. Hybrid nuclear reactor grey rod to obtain required reactivity worth

    DOEpatents

    Miller, John V.; Carlson, William R.; Yarbrough, Michael B.

    1991-01-01

    Hybrid nuclear reactor grey rods are described, wherein geometric combinations of relatively weak neutron absorber materials such as stainless steel, zirconium or INCONEL, and relatively strong neutron absorber materials, such as hafnium, silver-indium cadmium and boron carbide, are used to obtain the reactivity worths required to reach zero boron change load follow. One embodiment includes a grey rod which has combinations of weak and strong neutron absorber pellets in a stainless steel cladding. The respective pellets can be of differing heights. A second embodiment includes a grey rod with a relatively thick stainless steel cladding receiving relatively strong neutron absorber pellets only. A third embodiment includes annular relatively weak netron absorber pellets with a smaller diameter pellet of relatively strong absorber material contained within the aperture of each relatively weak absorber pellet. The fourth embodiment includes pellets made of a homogeneous alloy of hafnium and a relatively weak absorber material, with the percentage of hafnium chosen to obtain the desired reactivity worth.

  10. Microstructure of room temperature ionic liquids at stepped graphite electrodes

    DOE PAGES [OSTI]

    Feng, Guang; Li, Song; Zhao, Wei; Cummings, Peter T.

    2015-07-14

    Molecular dynamics simulations of room temperature ionic liquid (RTIL) [emim][TFSI] at stepped graphite electrodes were performed to investigate the influence of the thickness of the electrode surface step on the microstructure of interfacial RTILs. A strong correlation was observed between the interfacial RTIL structure and the step thickness in electrode surface as well as the ion size. Specifically, when the step thickness is commensurate with ion size, the interfacial layering of cation/anion is more evident; whereas, the layering tends to be less defined when the step thickness is close to the half of ion size. Furthermore, two-dimensional microstructure of ionmore » layers exhibits different patterns and alignments of counter-ion/co-ion lattice at neutral and charged electrodes. As the cation/anion layering could impose considerable effects on ion diffusion, the detailed information of interfacial RTILs at stepped graphite presented here would help to understand the molecular mechanism of RTIL-electrode interfaces in supercapacitors.« less

  11. The Status of the Construction of MICE Step IV

    SciTech Connect

    Snopok, P.; Overton, E.

    2014-07-01

    The International Muon Ionization Cooling Experiment will provide the demononstration ionization cooling. The experiment is being built in a series of Steps. Step IV, which consists of a tracking spectrometer upstream and downstream of an absorber/focus-coil module will be completed in early in 2015. In this configuration, the emittance of the muon beam upstream and downstream of the absorbed will be measured precisely allowing the emittance reduction and the factors that determine the ionization-cooling effect to be studied in detail. Each tracking spectrometer consists of a scintillating-fibre tracker placed within a 4 T field provided by the superconducting spectrometer solenoid. The muon beam is transported to the absorber/focus-coil module: a 22 liter volume of liquid hydrogen placed inside a superconducting focusing coil. The properties of lithium hydride, and possibly other absorber materials, will also be studied. All the components of Step IV have been manufactured and integration of the experiment in the MICE Hall at the Rutherford Appleton Laboratory is underway. The construction and performance of Step IV will be described. A full study of ionization cooling will be carried out with Step V of the experiment which will include a short 201 MHz linac module in which beam transport is achieved with a superconducting “coupling-coil”. The status of the preparation of the components of Step V of the experiment will be described briefly.

  12. Two-step growth of two-dimensional WSe2/MoSe2 heterostructures

    DOE PAGES [OSTI]

    Gong, Yongji; Lei, Sidong; Lou, Jun; Liu, Zheng; Vajtai, Robert; Zhou, Wu; Ajayan, Pullikel M.; Ye, Gonglan; Li, Bo; He, Yongmin; et al

    2015-08-03

    Two dimensional (2D) materials have attracted great attention due to their unique properties and atomic thickness. Although various 2D materials have been successfully synthesized with different optical and electrical properties, a strategy for fabricating 2D heterostructures must be developed in order to construct more complicated devices for practical applications. Here we demonstrate for the first time a two-step chemical vapor deposition (CVD) method for growing transition-metal dichalcogenide (TMD) heterostructures, where MoSe2 was synthesized first and followed by an epitaxial growth of WSe2 on the edge and on the top surface of MoSe2. Compared to previously reported one-step growth methods, thismore » two-step growth has the capability of spatial and size control of each 2D component, leading to much larger (up to 169 μm) heterostructure size, and cross-contamination can be effectively minimized. Furthermore, this two-step growth produces well-defined 2H and 3R stacking in the WSe2/MoSe2 bilayer regions and much sharper in-plane interfaces than the previously reported MoSe2/WSe2 heterojunctions obtained from one-step growth methods. The resultant heterostructures with WSe2/MoSe2 bilayer and the exposed MoSe2 monolayer display rectification characteristics of a p-n junction, as revealed by optoelectronic tests, and an internal quantum efficiency of 91% when functioning as a photodetector. As a result, a photovoltaic effect without any external gates was observed, showing incident photon to converted electron (IPCE) efficiencies of approximately 0.12%, providing application potential in electronics and energy harvesting.« less

  13. OBTAINING POTENTIAL FIELD SOLUTIONS WITH SPHERICAL HARMONICS AND FINITE DIFFERENCES

    SciTech Connect

    Toth, Gabor; Van der Holst, Bart; Huang Zhenguang

    2011-05-10

    Potential magnetic field solutions can be obtained based on the synoptic magnetograms of the Sun. Traditionally, a spherical harmonics decomposition of the magnetogram is used to construct the current- and divergence-free magnetic field solution. This method works reasonably well when the order of spherical harmonics is limited to be small relative to the resolution of the magnetogram, although some artifacts, such as ringing, can arise around sharp features. When the number of spherical harmonics is increased, however, using the raw magnetogram data given on a grid that is uniform in the sine of the latitude coordinate can result in inaccurate and unreliable results, especially in the polar regions close to the Sun. We discuss here two approaches that can mitigate or completely avoid these problems: (1) remeshing the magnetogram onto a grid with uniform resolution in latitude and limiting the highest order of the spherical harmonics to the anti-alias limit; (2) using an iterative finite difference algorithm to solve for the potential field. The naive and the improved numerical solutions are compared for actual magnetograms and the differences are found to be rather dramatic. We made our new Finite Difference Iterative Potential-field Solver (FDIPS) a publicly available code so that other researchers can also use it as an alternative to the spherical harmonics approach.

  14. New space value of the solar oblateness obtained with PICARD

    SciTech Connect

    Irbah, Abdanour; Meftah, Mustapha; Hauchecorne, Alain; Bocquier, Maxime; Cisse, E. Momar; Djafer, Djelloul; Corbard, Thierry

    2014-04-20

    The PICARD spacecraft was launched on 2010 June 15 with the scientific objective of studying the geometry of the Sun. It is difficult to measure solar oblateness because images are affected by optical distortion. Rolling the satellite, as done in previous space missions, determines the contribution of the telescope by assuming that the geometry of the Sun is constant during the observations. The optical response of the telescope is considered to be time-invariant during the roll operations. This is not the case for PICARD because an orbital signature is clearly observed in the solar radius computed from its images. We take this effect into account and provide the new space value of solar oblateness from PICARD images recorded in the solar continuum at 535.7 nm on 2011 July 4-5. The equator-pole radius difference is 8.4 ± 0.5 mas, which corresponds to an absolute radius difference of 6.1 km. This coincides with the mean value of all solar oblateness measurements obtained during the last two decades from the ground, balloons, and space. It is also consistent with values determined from models using helioseismology data.

  15. Imaginary Time Step Method to Solve the Dirac Equation with Nonlocal Potential

    SciTech Connect

    Zhang Ying [State Key Lab Nucl. Phys. and Tech., School of Physics, Peking University, Beijing 100871 (China); Liang Haozhao [State Key Lab Nucl. Phys. and Tech., School of Physics, Peking University, Beijing 100871 (China); Institut de Physique Nucleaire, IN2P3-CNRS and Universite Paris-Sud, F-91406 Orsay France (France); Meng Jie [State Key Lab Nucl. Phys. and Tech., School of Physics, Peking University, Beijing 100871 (China); Department of Physics, University of Stellenbosch, Stellenbosch (South Africa)

    2009-08-26

    The imaginary time step (ITS) method is applied to solve the Dirac equation with nonlocal potentials in coordinate space. Taking the nucleus {sup 12}C as an example, even with nonlocal potentials, the direct ITS evolution for the Dirac equation still meets the disaster of the Dirac sea. However, following the recipe in our former investigation, the disaster can be avoided by the ITS evolution for the corresponding Schroedinger-like equation without localization, which gives the convergent results exactly the same with those obtained iteratively by the shooting method with localized effective potentials.

  16. The structure and reactivity of adsorbates on stepped Rh and Pt surfaces investigated by LEED, HREELS, TPD, XPS and STM

    SciTech Connect

    Batteas, J.D. |

    1995-06-01

    Defects on surfaces such as steps play an important role in surface chemistry. In order to obtain an understanding of the influence of steps in surface chemical reactions, the structure and reactivity of small molecules (O{sub 2}, CO, H{sub 2}S, and C{sub 2}H{sub 4}) on atomically stepped surfaces of RH and Pt have been investigated. The detailed structures of CO and oxygen bonded to the Rh(110) surface were determined. The CO molecules bond near the short bridge sites with the CO molecular axis tilted approximately 24{degree} from the surface normal. Oxygen atoms are bound asymmetrically in the 3-fold fcc hollow-sites to the (111) facets of the steps. The interactions of CO and oxygen on the Rh(311) surface were examined. The reaction of CO with the ordered phases of O shows two distinct reaction channels, a low temperature reaction limited channel (200 K) and a high temperature diffusion limited channel (350 K). Models of the reaction geometry and dynamics are proposed. The thermal decomposition of ethylene was examined on the Rh(311) surface. The stable decomposition species (C{sub 2}H, CH and C{sub 2}) are formed near 300 K, approximately 100 K lower on the stepped Rh(311) than on the flatter Rh(111) surface. The formation of these species at lower temperatures is attributed to the stepped nature of the surface. Finally, in situ STM was used to examine surface structural changes of a stepped Pt(111) crystal under coadsorption of sulfur and CO. This is the first direct evidence for a new mechanism by which a surface covered with an unreactive, strongly chemisorbed overlayer can form new sites, for bonding and reactions to occur, by massive surface restructuring at the step edges. This new surface phenomenon answers some of the puzzles of metal surface catalysis and its implications are described. 278 refs.

  17. Accuracy-based time step criteria for solving parabolic equations

    SciTech Connect

    Mohtar, R.; Segerlind, L.

    1995-12-31

    Parabolic equations govern many transient engineering problems. Space integration using finite element or finite difference methods changes the parabolic partial differential equation into an ordinary differential equation. Time integration schemes are needed to solve the later equation. In order to accurately perform the later integration a proper time step must be provided. Time step estimates based on a stability criteria have been prescribed in the literature. The following paper presents time step estimates that satisfy stability as well as accuracy criteria. These estimates were correlated to the Froude and Courant Numbers. The later criteria were found to be overly conservative for some integration schemes. Suggestions as to which time integration scheme is the best to use are also presented.

  18. Composite-step product methods for solving nonsymmetric linear systems

    SciTech Connect

    Chan, T.F.; Szeto, T.

    1994-12-31

    The Biconjugate Gradient (BCG) algorithm is the {open_quotes}natural{close_quotes} generalization of the classical Conjugate Gradient method to nonsymmetric linear systems. It is an attractive method because of its simplicity and its good convergence properties. Unfortunately, BCG suffers from two kinds of breakdowns (divisions by 0): one due to the non-existence of the residual polynomial, and the other due to a breakdown in the recurrence relationship used. There are many look-ahead techniques in existence which are designed to handle these breakdowns. Although the step size needed to overcome an exact breakdown can be computed in principle, these methods can unfortunately be quite complicated for handling near breakdowns since the sizes of the look-ahead steps are variable (indeed, the breakdowns can be incurable). Recently, Bank and Chan introduced the Composite Step Biconjugate Gradient (CSBCG) algorithm, an alternative which cures only the first of the two breakdowns mentioned by skipping over steps for which the BCG iterate is not defined. This is done with a simple modification of BCG which needs only a maximum look-ahead step size of 2 to eliminate the (near) breakdown and to smooth the sometimes erratic convergence of BCG. Thus, instead of a more complicated (but less prone to breakdown) version, CSBCG cures only one kind of breakdown, but does so with a minimal modification to the usual implementation of BCG in the hope that its empirically observed stability will be inherited. The authors note, then, that the Composite Step idea can be incorporated anywhere the BCG polynomial is used; in particular, in product methods such as CGS, Bi-CGSTAB, and TFQMR. Doing this not only cures the breakdown mentioned above, but also takes on the advantages of these product methods, namely, no multiplications by the transpose matrix and a faster convergence rate than BCG.

  19. Noise correction of turbulent spectra obtained from Acoustic Doppler Velocimeters

    SciTech Connect

    Durgesh, Vibhav; Thomson, Jim; Richmond, Marshall C.; Polagye, Brian

    2014-03-02

    Accurately estimated auto-spectral density functions are essential for characterization of turbulent flows, and they also have applications in computational fluid dynamics modeling, site and inflow characterization for hydrokinetic turbines, and inflow turbulence generation. The Acoustic Doppler Velocimeter (ADV) provides single-point temporally resolved data, that are used to characterize turbulent flows in rivers, seas, and oceans. However, ADV data are susceptible to contamination from various sources, including instrument noise, which is the intrinsic limit to the accuracy of acoustic velocity measurements. Due to the presence of instrument noise, the spectra obtained are altered at high frequencies. The focus of this study is to develop a robust and effective method for accurately estimating auto-spectral density functions from ADV data by reducing or removing the spectral contribution derived from instrument noise. For this purpose, the “Noise Auto-Correlation” (NAC) approach was developed, which exploits the correlation properties of instrument noise to identify and remove its contribution from spectra. The spectra estimated using the NAC approach exhibit increased fidelity and a slope of -5/3 in the inertial range, which is typically observed for turbulent flows. Finally, this study also compares the effectiveness of low-pass Gaussian filters in removing instrument noise with that of the NAC approach. For the data used in this study, both the NAC and Gaussian filter approaches are observed to be capable of removing instrument noise at higher frequencies from the spectra. However, the NAC results are closer to the expected frequency power of -5/3 in the inertial sub-range.

  20. Locke, Chu Announce Significant Steps in Smart Grid Development |

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Department of Energy Locke, Chu Announce Significant Steps in Smart Grid Development Locke, Chu Announce Significant Steps in Smart Grid Development May 18, 2009 - 12:00am Addthis WASHINGTON - U.S. Commerce Secretary Gary Locke and U.S. Energy Secretary Steven Chu today announced significant progress that will help expedite development of a nationwide "smart" electric power grid. A Smart Grid would replace the current, outdated system and employ real-time, two-way communication

  1. Wollaston prism phase-stepping point diffraction interferometer and method

    DOEpatents

    Rushford, Michael C.

    2004-10-12

    A Wollaston prism phase-stepping point diffraction interferometer for testing a test optic. The Wollaston prism shears light into reference and signal beams, and provides phase stepping at increased accuracy by translating the Wollaston prism in a lateral direction with respect to the optical path. The reference beam produced by the Wollaston prism is directed through a pinhole of a diaphragm to produce a perfect spherical reference wave. The spherical reference wave is recombined with the signal beam to produce an interference fringe pattern of greater accuracy.

  2. A Critical Step Toward Sustainable Nuclear Fuel Disposal | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy A Critical Step Toward Sustainable Nuclear Fuel Disposal A Critical Step Toward Sustainable Nuclear Fuel Disposal January 26, 2012 - 2:30pm Addthis Secretary Chu Secretary Chu Former Secretary of Energy The Blue Ribbon Commission on America's Nuclear Future was formed at the direction of the President to conduct a comprehensive review of polices for managing the back end of the nuclear fuel cycle. If we are going to ensure that the United States remains at the forefront of nuclear

  3. Short-term Time Step Convergence in a Climate Model

    SciTech Connect

    Wan, Hui; Rasch, Philip J.; Taylor, Mark; Jablonowski, Christiane

    2015-02-11

    A testing procedure is designed to assess the convergence property of a global climate model with respect to time step size, based on evaluation of the root-mean-square temperature difference at the end of very short (1 h) simulations with time step sizes ranging from 1 s to 1800 s. A set of validation tests conducted without sub-grid scale parameterizations confirmed that the method was able to correctly assess the convergence rate of the dynamical core under various configurations. The testing procedure was then applied to the full model, and revealed a slow convergence of order 0.4 in contrast to the expected first-order convergence. Sensitivity experiments showed without ambiguity that the time stepping errors in the model were dominated by those from the stratiform cloud parameterizations, in particular the cloud microphysics. This provides a clear guidance for future work on the design of more accurate numerical methods for time stepping and process coupling in the model.

  4. Institutional Change Process Step 2: Identify Rules, Roles, and Tools

    Office of Energy Efficiency and Renewable Energy (EERE)

    After determining your institutional change sustainability goals, the next step is to analyze the context within which these goals are to be achieved. Start by identifying the organizational rules, roles, and tools that shape the current context and may influence success in achieving these goals. Identifying the linkages among rules, roles, and tools and how they interact will help in implementing solutions for success.

  5. Short-term time step convergence in a climate model

    DOE PAGES [OSTI]

    Wan, Hui; Rasch, Philip J.; Taylor, Mark; Jablonowski, Christiane

    2015-02-11

    A testing procedure is designed to assess the convergence property of a global climate model with respect to time step size, based on evaluation of the root-mean-square temperature difference at the end of very short (1 h) simulations with time step sizes ranging from 1 s to 1800 s. A set of validation tests conducted without sub-grid scale parameterizations confirmed that the method was able to correctly assess the convergence rate of the dynamical core under various configurations. The testing procedure was then applied to the full model, and revealed a slow convergence of order 0.4 in contrast to themoreexpected first-order convergence. Sensitivity experiments showed without ambiguity that the time stepping errors in the model were dominated by those from the stratiform cloud parameterizations, in particular the cloud microphysics. This provides a clear guidance for future work on the design of more accurate numerical methods for time stepping and process coupling in the model.less

  6. Short-term Time Step Convergence in a Climate Model

    DOE PAGES [OSTI]

    Wan, Hui; Rasch, Philip J.; Taylor, Mark; Jablonowski, Christiane

    2015-02-11

    A testing procedure is designed to assess the convergence property of a global climate model with respect to time step size, based on evaluation of the root-mean-square temperature difference at the end of very short (1 h) simulations with time step sizes ranging from 1 s to 1800 s. A set of validation tests conducted without sub-grid scale parameterizations confirmed that the method was able to correctly assess the convergence rate of the dynamical core under various configurations. The testing procedure was then applied to the full model, and revealed a slow convergence of order 0.4 in contrast to themore » expected first-order convergence. Sensitivity experiments showed without ambiguity that the time stepping errors in the model were dominated by those from the stratiform cloud parameterizations, in particular the cloud microphysics. This provides a clear guidance for future work on the design of more accurate numerical methods for time stepping and process coupling in the model.« less

  7. The Blue Ribbon Commission Offers Strong Step Forward

    Energy.gov [DOE]

    The interim report issued today is a strong step toward finding a workable solution to the challenges of the back end of the fuel cycle. The Obama Administration continues to believe that nuclear energy has an important role to play as America moves to a clean energy future.

  8. STEP 1: TO BE COMPLETED BY ALCOHOL TECHNICIAN

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    7 (05-2016) OMB Control No. 1910-5122 U.S. Department of Energy (DOE) Human Reliability Program (HRP) Alcohol Testing (Instructions for completing this form are attached.) STEP 1: TO BE COMPLETED BY ALCOHOL TECHNICIAN A. Employee Name __________________________________________________________________ (Print) First M.I. Last B. Employee ID No. __________________________________________________________ C. Employer Name __________________________________________________________

  9. Shapiro like steps reveals molecular nanomagnets’ spin dynamics

    SciTech Connect

    Abdollahipour, Babak; Abouie, Jahanfar Ebrahimi, Navid

    2015-09-15

    We present an accurate way to detect spin dynamics of a nutating molecular nanomagnet by inserting it in a tunnel Josephson junction and studying the current voltage (I-V) characteristic. The spin nutation of the molecular nanomagnet is generated by applying two circularly polarized magnetic fields. We demonstrate that modulation of the Josephson current by the nutation of the molecular nanomagnet’s spin appears as a stepwise structure like Shapiro steps in the I-V characteristic of the junction. Width and heights of these Shapiro-like steps are determined by two parameters of the spin nutation, frequency and amplitude of the nutation, which are simply tuned by the applied magnetic fields.

  10. Winnebago Tribe - Energy Options Analysis and Organization Development - First Steps

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    D.O.E. Tribal Energy Program Review Energy Options Analysis and Organization Development: A First Steps Project Overview October 20, 2005 © 2005 All Rights Reserved Discussion Outline Background The Winnebago Tribe Leveraging Prior and Future Work Project Objectives The Winnebago Strategic Energy Vision Project Approach Energy Options Analysis Utility Organization Analysis Project Benefits Assessment Implementation Plan Project Contacts © 2005 All Rights Reserved Background The Winnebago Tribe

  11. Department of Energy Announces Steps to Help Modernize Natural Gas

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Infrastructure | Department of Energy Help Modernize Natural Gas Infrastructure Department of Energy Announces Steps to Help Modernize Natural Gas Infrastructure July 29, 2014 - 3:58pm Addthis News Media Contact 202-586-4940 Plan Follows Final Capstone Roundtable on Reducing Methane Emissions Washington, D.C. - Building on the President's Climate Action Plan, today the White House and the Department of Energy hosted the fifth in a series of meetings on reducing methane emissions from natural

  12. Guide to Community Energy Strategic Planning: Step 4

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    4-1 March 2013 WHAT: An energy profile maps out a jurisdiction's present energy landscape, including:  Current and projected future energy use and supply data;  An inventory of existing energy-related activities, projects, programs, and policies; and  Information on available human and organizational resources to help implement a CESP. A summary of findings and conclusions from this assessment, along with sections on the outcomes from previous steps, will be published as an Energy

  13. Guide to Community Energy Strategic Planning: Step 9

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    9-1 March 2013 WHAT: While it may seem early to think about evaluating the outcomes of CESP actions, setting out a clear process for periodic assessment and evaluation up front means that responsibility for these important steps is clear and intentional. In concert with developing an implementation blueprint, identify the process and resources now for monitoring and evaluating progress, as well as providing that information to the public and making necessary adjustments. WHY: Monitoring and

  14. Refining each process step to accelerate the development of biorefineries

    DOE PAGES [OSTI]

    Chandra, Richard P.; Ragauskas, Art J.

    2016-06-21

    Research over the past decade has been mainly focused on overcoming hurdles in the pretreatment, enzymatic hydrolysis, and fermentation steps of biochemical processing. Pretreatments have improved significantly in their ability to fractionate and recover the cellulose, hemicellulose, and lignin components of biomass while producing substrates containing carbohydrates that can be easily broken down by hydrolytic enzymes. There is a rapid movement towards pretreatment processes that incorporate mechanical treatments that make use of existing infrastructure in the pulp and paper industry, which has experienced a downturn in its traditional markets. Enzyme performance has also made great strides with breakthrough developments inmore » nonhydrolytic protein components, such as lytic polysaccharide monooxygenases, as well as the improvement of enzyme cocktails.The fermentability of pretreated and hydrolyzed sugar streams has been improved through strategies such as the use of reducing agents for detoxification, strain selection, and strain improvements. Although significant progress has been made, tremendous challenges still remain to advance each step of biochemical conversion, especially when processing woody biomass. In addition to technical and scale-up issues within each step of the bioconversion process, biomass feedstock supply and logistics challenges still remain at the forefront of biorefinery research.« less

  15. Primordial features due to a step in the inflaton potential

    SciTech Connect

    Hazra, Dhiraj Kumar; Sriramkumar, L.; Aich, Moumita; Souradeep, Tarun; Jain, Rajeev Kumar E-mail: moumita@iucaa.ernet.in E-mail: sriram@hri.res.in

    2010-10-01

    Certain oscillatory features in the primordial scalar power spectrum are known to provide a better fit to the outliers in the cosmic microwave background data near the multipole moments of l = 22 and 40. These features are usually generated by introducing a step in the popular, quadratic potential describing the canonical scalar field. Such a model will be ruled out, if the tensors remain undetected at a level corresponding to a tensor-to-scalar ratio of, say, r ≅ 0.1. In this work, in addition to the popular quadratic potential, we investigate the effects of the step in a small field model and a tachyon model. With possible applications to future datasets (such as PLANCK) in mind, we evaluate the tensor power spectrum exactly, and include its contribution in our analysis. We compare the models with the WMAP (five as well as seven-year), the QUaD and the ACBAR data. As expected, a step at a particular location and of a suitable magnitude and width is found to improve the fit to the outliers (near l = 22 and 40) in all these cases. We point out that, if the tensors prove to be small (say, r∼<0.01), the quadratic potential and the tachyon model will cease to be viable, and more attention will need to be paid to examples such as the small field models.

  16. Energy Department Takes Major Steps to Increase U.S. Energy Productivi...

    Energy Saver

    Takes Major Steps to Increase U.S. Energy Productivity and Manufacturing Energy Department Takes Major Steps to Increase U.S. Energy Productivity and Manufacturing September 17, ...

  17. Two-Step Annealing Study of Cuprous Oxide for Photovoltaic Application...

    Office of Scientific and Technical Information (OSTI)

    Two-Step Annealing Study of Cuprous Oxide for Photovoltaic Applications Citation Details In-Document Search Title: Two-Step Annealing Study of Cuprous Oxide for Photovoltaic ...

  18. Step by Step Instructions

    Office of Environmental Management (EM)

    which the OMB approval and validity of the OMB control number are about to expire. 2. Once it's been determined that a program has an ICR, the program works with their...

  19. Step by Step

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    setting power rates or transmission rates. Prior to the start of the formal ratemaking process (which begins with the publication of a notice in the Federal Register, BPA hires...

  20. HIA, the next step: Defining models and roles

    SciTech Connect

    Putters, Kim . E-mail: k.putters@uvt.nl

    2005-10-15

    If HIA is to be an effective instrument for optimising health interests in the policy making process it has to recognise the different contests in which policy is made and the relevance of both technical rationality and political rationality. Policy making may adopt a rational perspective in which there is a systematic and orderly progression from problem formulation to solution or a network perspective in which there are multiple interdependencies, extensive negotiation and compromise, and the steps from problem to formulation are not followed sequentially or in any particular order. Policy problems may be simple with clear causal pathways and responsibilities or complex with unclear causal pathways and disputed responsibilities. Network analysis is required to show which stakeholders are involved, their support for health issues and the degree of consensus. From this analysis three models of HIA emerge. The first is the phases model which is fitted to simple problems and a rational perspective of policymaking. This model involves following structured steps. The second model is the rounds (Echternach) model that is fitted to complex problems and a network perspective of policymaking. This model is dynamic and concentrates on network solutions taking these steps in no particular order. The final model is the 'garbage can' model fitted to contexts which combine simple and complex problems. In this model HIA functions as a problem solver and signpost keeping all possible solutions and stakeholders in play and allowing solutions to emerge over time. HIA models should be the beginning rather than the conclusion of discussion the worlds of HIA and policymaking.

  1. EERE Announces Next Steps on President's Climate Action Plan

    Energy.gov [DOE]

    On Friday, June 28, the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy hosted a webinar on the energy efficiency aspects of the President's Climate Action Plan. Rick Duke, Associate Director of the White House Council on Environmental Quality and the Domestic Policy Council, provided an overview of President Obama's comprehensive Climate Action Plan to cut the carbon pollution that causes climate change and threatens our health. The Department of Energy's Deputy Assistant Secretary for Energy Efficiency, Kathleen Hogan, provided a deeper dive into how EERE will implement the plan's action steps to cut energy waste in our homes, businesses, and factories. See the webinar slides.

  2. Step-wise supercritical extraction of carbonaceous residua

    DOEpatents

    Warzinski, Robert P.

    1987-01-01

    A method of fractionating a mixture containing high boiling carbonaceous material and normally solid mineral matter includes processing with a plurality of different supercritical solvents. The mixture is treated with a first solvent of high critical temperature and solvent capacity to extract a large fraction as solute. The solute is released as liquid from solvent and successively treated with other supercritical solvents of different critical values to extract fractions of differing properties. Fractionation can be supplemented by solute reflux over a temperature gradient, pressure let down in steps and extractions at varying temperature and pressure values.

  3. Guide to Community Energy Strategic Planning: Step 3

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    3-1 March 2013 WHAT: An effective energy vision statement offers a representation of what the community wants to look like 10-20 years into the future. WHY: This "future best self" provides a focus for the rest of the work that will go into the CESP. A clearly articulated, transparent, and shared vision of the community's energy future sets the direction for subsequent decisions about goals, strategies, and actions. WHO: This step will be initiated and guided by the Leadership Team,

  4. April 2 Webinar to Introduce Five-Step Tribal Energy Project Development Process

    Energy.gov [DOE]

    Attend this webinar to learn about the five key steps to successful tribal energy project development.

  5. Our Next Two Steps for Fukushima Daiichi Muon Tomography

    SciTech Connect

    Miyadera, Haruo

    2012-04-11

    After the vast disasters caused by the great earthquake and tsunami in eastern Japan, we proposed applying our Muon Tomography (MT) technique to help and improve the emergency situation at Fukushima Daiichi using cosmic-ray muons. A reactor-tomography team was formed at LANL which was supported by the Laboratory as a response to a request by the former Japanese Prime Minister, Naoto Kan. Our goal is to help the Japanese people and support remediation of the reactors. At LANL, we have carried out a proof-of-principle technical demonstration and simulation studies that established the feasibility of MT to image a reactor core. This proposal covers the next two critical steps for Fukushima Daiichi Muon Imaging: (1) undertake case study mock-up experiments of Fukushima Daiichi, and (2) system optimization. We requested funding to the US and Japanese government to assess damage of reactors at Fukushima Daiichi. The two steps will bring our project to the 'ready-to-go' level.

  6. The Five-Step Process Framework for Project Development and Key Concepts

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Framework for Project Development and Key Concepts Project Development Process: What Is It? * Framework based on experience * Focuses on key decision points * Shows that project development is iterative * Emphasizes that delaying or deciding against a project that does not meet current goals is a viable outcome and option 2 Project Uncertainty/Capitol at Risk 3 Unknowns Investment Revenue pays off invested $ Project Operation Financial Close Step 1, Step 2, Step 3 Step 4 Step 5 Construction

  7. Hydrogenation of O and OH on Pt(111): A comparison between the reaction rates of the first and the second hydrogen addition steps

    SciTech Connect

    Nslund, L.-., E-mail: lars-ake.naslund@liu.se [Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States)

    2014-03-14

    The formation of water through hydrogenation of oxygen on platinum occurs at a surprisingly low reaction rate. The reaction rate limited process for this catalytic reaction is, however, yet to be settled. In the present work, the reaction rates of the first and the second hydrogen addition steps are compared when hydrogen is obtained through intense synchrotron radiation that induces proton production in a water overlayer on top of the adsorbed oxygen species. A substantial amount of the produced hydrogen diffuses to the platinum surface and promotes water formation at the two starting conditions O/Pt(111) and (H{sub 2}O+OH)/Pt(111). The comparison shows no significant difference in the reaction rate between the first and the second hydrogen addition steps, which indicates that the rate determining process of the water formation from oxygen on Pt(111) is neither the first nor the second H addition step or, alternatively, that both H addition steps exert rate control.

  8. Tunability of exchange bias in Ni@NiO core-shell nanoparticles obtained by sequential layer deposition

    DOE PAGES [OSTI]

    D'Addato, Sergio; Spadaro, Maria Chiara; Luches, Paola; Valeri, Sergio; Grillo, Vincenzo; Rotunno, Enzo; Roldan Gutierrez, Manuel A.; Pennycook, Stephen J.; Ferretti, Anna Maria; Capetti, Elena; et al

    2015-01-01

    Films of magnetic Ni@NiO core–shell nanoparticles (NPs, core diameter d ≅ 12 nm, nominal shell thickness variable between 0 and 6.5 nm) obtained with sequential layer deposition were investigated, to gain insight into the relationships between shell thickness/morphology, core-shell interface, and magnetic properties. Different values of NiO shell thickness ts could be obtained while keeping the Ni core size fixed, at variance with conventional oxidation procedures where the oxide shell is grown at the expense of the core. Chemical composition, morphology of the as-produced samples and structural features of the Ni/NiO interface were investigated with x-ray photoelectron spectroscopy and microscopymore » (scanning electron microscopy, transmission electron microscopy) techniques, and related with results from magnetic measurements obtained with a superconducting quantum interference device. The effect of the shell thickness on the magnetic properties could be studied. The exchange bias (EB) field Hbias is small and almost constant for ts up to 1.6 nm; then it rapidly grows, with no sign of saturation. This behavior is clearly related to the morphology of the top NiO layer, and is mostly due to the thickness dependence of the NiO anisotropy constant. The ability to tune the EB effect by varying the thickness of the last NiO layer represents a step towards the rational design and synthesis of core–shell NPs with desired magnetic properties.« less

  9. Funding Opportunity Announcement: Solar Training and Education for Professionals (STEP)

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Solar Training and Education for Professionals (STEP) funding program will tackle soft costs by addressing gaps in solar training and energy education, both within the solar workforce and in professions that play a crucial role in solar deployment. First, it will support coordination among the Solar Instructor Training Network (SITN), military bases, and the solar industry. This will ensure that solar instructors are well connected to solar employers, the SITN materials are up-to-date, and veterans are connected to solar training institutions. Second, it will establish new credentials in solar operations and maintenance, and mid-scale installations. Third, this funding program will enable solar training and education for professionals in indirect and related fields such as real estate, finance, insurance, fire and code enforcement, and state regulations. Finally, it will support the expansion of the Grid Engineering for Accelerated Renewable Energy Deployment (GEARED) initiative.

  10. Two-step polarization reversal in biased ferroelectrics

    SciTech Connect

    Daniels, John E. Ukritnukun, Supphatuch; Glaum, Julia; Cozzan, Clayton; Tutuncu, Goknur; Dosch, Chris; Andrieux, Jerome; Jo, Wook; Jones, Jacob L.

    2014-06-14

    Polarization reversal in polycrystalline ferroelectrics is shown to occur via two distinct and sequential domain reorientation steps. This reorientation sequence, which cannot be readily discriminated in the overall sample polarization, is made apparent using time-resolved high-energy x-ray diffraction. Upon application of electric fields opposite to the initial poling direction, two unique and significantly different time constants are observed. The first (faster time constant) is shown to be derived by the release of a residual stress due to initial electrical biasing and the second (slower time constant) due to the redevelopment of residual stress during further domain wall motion. A modified domain reorientation model is given that accurately describes the domain volume fraction evolution during the reversal process.

  11. Stepping motor control processor reference manual. Volume I

    SciTech Connect

    Holloway, F.W.; VanArsdall, P.J.; Suski, G.J.; Gant, R.G.; Rash, M.

    1980-06-06

    This manual is intended to serve several purposes. The first goal is to describe the capabilities and operation of the SMC processor package from an operator or user point of view. Secondly, the manual will describe in some detail the basic hardware elements and how they can be used effectively to implement a step motor control system. Practical information on the use, installation and checkout of the hardware set is presented in the following sections along with programming suggestions. Available related system software is described in this manual for reference and as an aid in understanding the system architecture. Section two presents an overview and operations manual of the SMC processor describing its composition and functional capabilities. Section three contains hardware descriptions in some detail for the LLL-designed hardware used in the SMC processor. Basic theory of operation and important features are explained.

  12. One-step method for the production of nanofluids

    DOEpatents

    Kostic, Milivoje; Golubovic, Mihajlo; Hull, John; Choi, Stephen U. S.

    2011-08-16

    A one step method and system for producing nanofluids by a nanoparticle-source evaporation and deposition of the evaporant into a base fluid. The base fluid such oil or ethylene glycol is placed in a rotating cylindrical drum having an adjustable heater-boat-evaporator and heat exchanger-cooler apparatus. As the drum rotates, a thin liquid layer is formed on the inside surface of the drum. An insulated heater-boat-evaporator having an evaporant material (nanoparticle-source) placed within its boat evaporator is adjustably positioned near a portion of the rotating thin liquid layer, the evaporant material being heated thereby evaporating a portion of the evaporant material and forming nanoparticles, the nanoparticles absorbed by the liquid film to form nanofluid.

  13. One-step method for the production of nanofluids

    DOEpatents

    Kostic, Milivoje; Golubovic, Mihajlo; Hull, John R.; Choi, Stephen U. S.

    2010-05-18

    A one step method and system for producing nanofluids by a particle-source evaporation and deposition of the evaporant into a base fluid. The base fluid such (i.e. ethylene glycol) is placed in a rotating cylindrical drum having an adjustable heater-boat-evaporator and heat exchanger-cooler apparatus. As the drum rotates, a thin liquid layer is formed on the inside surface of the drum. A heater-boat-evaporator having an evaporant material (particle-source) placed within its boat evaporator is adjustably positioned near a portion of the rotating thin liquid layer, the evaporant material being heated thereby evaporating a portion of the evaporant material, the evaporated material absorbed by the liquid film to form nanofluid.

  14. Atomic friction at exposed and buried graphite step edges: Experiments and simulations

    SciTech Connect

    Ye, Zhijiang; Martini, Ashlie

    2015-06-08

    The surfaces of layered materials such as graphite exhibit step edges that affect friction. Step edges can be exposed, where the step occurs at the outmost layer, or buried, where the step is underneath another layer of material. Here, we study friction at exposed and buried step edges on graphite using an atomic force microscope (AFM) and complementary molecular dynamics simulations of the AFM tip apex. Exposed and buried steps exhibit distinct friction behavior, and the friction on either step is affected by the direction of sliding, i.e., moving up or down the step, and the bluntness of the tip. These trends are analyzing in terms of the trajectory of the AFM tip as it moves over the step, which is a convolution of the topography of the surface and the tip shape.

  15. Refined BCF-type boundary conditions for mesoscale surface step dynamics

    SciTech Connect

    Zhao, Renjie; Ackerman, David M.; Evans, James W.

    2015-06-24

    Deposition on a vicinal surface with alternating rough and smooth steps is described by a solid-on-solid model with anisotropic interactions. Kinetic Monte Carlo (KMC) simulations of the model reveal step pairing in the absence of any additional step attachment barriers. We explore the description of this behavior within an analytic Burton-Cabrera-Frank (BCF)-type step dynamics treatment. Without attachment barriers, conventional kinetic coefficients for the rough and smooth steps are identical, as are the predicted step velocities for a vicinal surface with equal terrace widths. However, we determine refined kinetic coefficients from a two-dimensional discrete deposition-diffusion equation formalism which accounts for step structure. These coefficients are generally higher for rough steps than for smooth steps, reflecting a higher propensity for capture of diffusing terrace adatoms due to a higher kink density. Such refined coefficients also depend on the local environment of the step and can even become negative (corresponding to net detachment despite an excess adatom density) for a smooth step in close proximity to a rough step. Incorporation of these refined kinetic coefficients into a BCF-type step dynamics treatment recovers quantitatively the mesoscale step-pairing behavior observed in the KMC simulations.

  16. Oxidation of step edges on vicinal 4H-SiC(0001) surfaces

    SciTech Connect

    Li, Wenbo; Zhu, Qiaozhi; Wang, Dejun, E-mail: dwang121@dlut.edu.cn [School of Electronic Science and Technology, Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024 (China)] [School of Electronic Science and Technology, Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024 (China); Zhao, Jijun [Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), College of Advanced Science and Technology, Ministry of Education, Dalian 116024 (China)] [Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), College of Advanced Science and Technology, Ministry of Education, Dalian 116024 (China)

    2013-11-18

    The oxidation processes of stepped SiC(0001) surfaces are studied within the ab initio atomistic thermodynamics approach. Our calculations show that a one-dimensional -Si-O- chain structure as a precursor for oxide growth on stepped SiC surfaces is formed along the step edge, promoting further oxidation of the step edges. Following the modified Deal-Grove oxidation model, we also find that the oxidation rate at steps is higher than that at terraces by three orders of magnitude. These findings give a reasonable explanation for the oxide thickness fluctuation between the step and the terrace observed in the previous experiments.

  17. Method and apparatus for single-stepping coherence events in a multiprocessor system under software control

    DOEpatents

    Blumrich, Matthias A.; Salapura, Valentina

    2010-11-02

    An apparatus and method are disclosed for single-stepping coherence events in a multiprocessor system under software control in order to monitor the behavior of a memory coherence mechanism. Single-stepping coherence events in a multiprocessor system is made possible by adding one or more step registers. By accessing these step registers, one or more coherence requests are processed by the multiprocessor system. The step registers determine if the snoop unit will operate by proceeding in a normal execution mode, or operate in a single-step mode.

  18. T-707: Apache Tomcat AJP Protocol Processing Bug Lets Remote Users Bypass Authentication or Obtain Information

    Energy.gov [DOE]

    Apache Tomcat AJP protocol processing bug lets remote users bypass authentication or obtain information.

  19. Refined BCF-type boundary conditions for mesoscale surface step dynamics

    DOE PAGES [OSTI]

    Zhao, Renjie; Ackerman, David M.; Evans, James W.

    2015-06-24

    Deposition on a vicinal surface with alternating rough and smooth steps is described by a solid-on-solid model with anisotropic interactions. Kinetic Monte Carlo (KMC) simulations of the model reveal step pairing in the absence of any additional step attachment barriers. We explore the description of this behavior within an analytic Burton-Cabrera-Frank (BCF)-type step dynamics treatment. Without attachment barriers, conventional kinetic coefficients for the rough and smooth steps are identical, as are the predicted step velocities for a vicinal surface with equal terrace widths. However, we determine refined kinetic coefficients from a two-dimensional discrete deposition-diffusion equation formalism which accounts for stepmore » structure. These coefficients are generally higher for rough steps than for smooth steps, reflecting a higher propensity for capture of diffusing terrace adatoms due to a higher kink density. Such refined coefficients also depend on the local environment of the step and can even become negative (corresponding to net detachment despite an excess adatom density) for a smooth step in close proximity to a rough step. Incorporation of these refined kinetic coefficients into a BCF-type step dynamics treatment recovers quantitatively the mesoscale step-pairing behavior observed in the KMC simulations.« less

  20. Step-Stress Accelerated Degradation Testing (SSADT) for Photovoltaic (PV) Devices and Cells (Presentation)

    SciTech Connect

    Lee, J.; Elmore, R.; Suh, C.; Jones, W.

    2010-10-01

    Presentation on step-stress accelerated degradation testing (SSADT) for photovoltaics (PV). Developed are a step-stress degradation test (SSADT) for PV reliability tests and a lifetime prediction model for PV products.

  1. Saving Energy and Money with Wind: 5 Steps Before You Invest...

    Office of Environmental Management (EM)

    and Money with Wind: 5 Steps Before You Invest in a New Wind Energy System Saving Energy and Money with Wind: 5 Steps Before You Invest in a New Wind Energy System December 23, ...

  2. New Accelerator Will Study Steps on the Path to Fusion Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Accelerator Will Study Steps on the Path to Fusion Power New Accelerator Will Study Steps on the Path to Fusion Power Unusual Machine Tailor-made to Examine Heavy-ion Fusion May ...

  3. April 2 Webinar to Introduce Five-Step Tribal Energy Project...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Webinar to Introduce Five-Step Tribal Energy Project Development Process April 2 Webinar to Introduce Five-Step Tribal Energy Project Development Process March 26, 2014 - 7:12pm...

  4. Towards Revised Step IV MICE Optics in the Absence of M1 SSD

    SciTech Connect

    Bayes, R.; Berg, J. S.; Blackmore, V.; Hunt, C.; Liu, A.; Pasternak, J.; Rogers, C. T.

    2015-10-01

    During magnet commissioning in September 2015, the leads on coil M1 of the downstream spectrometer solenoid failed. The coil will not be operational for MICE Step IV. Revised optics settings for the Step IV data taking are reviewed.

  5. A Two-Step Approach to Uncertainty Quantification of Core Simulators...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: A Two-Step Approach to Uncertainty Quantification of Core Simulators Citation Details In-Document Search Title: A Two-Step Approach to Uncertainty Quantification of ...

  6. Roles of carbon diffusion and step structure on the growth of...

    Office of Scientific and Technical Information (OSTI)

    Roles of carbon diffusion and step structure on the growth of graphene on SiC(0001). Citation Details In-Document Search Title: Roles of carbon diffusion and step structure on the ...

  7. Single-Step Non-Thermal Plasma Synthesis of 3C-SiC Nanoparticles...

    Office of Scientific and Technical Information (OSTI)

    Single-Step Non-Thermal Plasma Synthesis of 3C-SiC Nanoparticles Citation Details In-Document Search Title: Single-Step Non-Thermal Plasma Synthesis of 3C-SiC Nanoparticles ...

  8. Energy Department Takes First Step to Spur U.S. Manufacturing...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Takes First Step to Spur U.S. Manufacturing of Small Modular Nuclear Reactors Energy Department Takes First Step to Spur U.S. Manufacturing of Small Modular Nuclear Reactors ...

  9. A one-step delamination procedure to form single sheetiron(III...

    Office of Scientific and Technical Information (OSTI)

    A one-step delamination procedure to form single sheet iron(III)-(oxy)hydroxide Citation Details In-Document Search Title: A one-step delamination procedure to form single sheet...

  10. Diagnostic and Prognostic Models for Generator Step-Up Transformers

    SciTech Connect

    Vivek Agarwal; Nancy J. Lybeck; Binh T. Pham

    2014-09-01

    In 2014, the online monitoring (OLM) of active components project under the Light Water Reactor Sustainability program at Idaho National Laboratory (INL) focused on diagnostic and prognostic capabilities for generator step-up transformers. INL worked with subject matter experts from the Electric Power Research Institute (EPRI) to augment and revise the GSU fault signatures previously implemented in the Electric Power Research Institute’s (EPRI’s) Fleet-Wide Prognostic and Health Management (FW-PHM) Suite software. Two prognostic models were identified and implemented for GSUs in the FW-PHM Suite software. INL and EPRI demonstrated the use of prognostic capabilities for GSUs. The complete set of fault signatures developed for GSUs in the Asset Fault Signature Database of the FW-PHM Suite for GSUs is presented in this report. Two prognostic models are described for paper insulation: the Chendong model for degree of polymerization, and an IEEE model that uses a loading profile to calculates life consumption based on hot spot winding temperatures. Both models are life consumption models, which are examples of type II prognostic models. Use of the models in the FW-PHM Suite was successfully demonstrated at the 2014 August Utility Working Group Meeting, Idaho Falls, Idaho, to representatives from different utilities, EPRI, and the Halden Research Project.

  11. A massively parallel fractional step solver for incompressible flows

    SciTech Connect

    Houzeaux, G. Vazquez, M. Aubry, R. Cela, J.M.

    2009-09-20

    This paper presents a parallel implementation of fractional solvers for the incompressible Navier-Stokes equations using an algebraic approach. Under this framework, predictor-corrector and incremental projection schemes are seen as sub-classes of the same class, making apparent its differences and similarities. An additional advantage of this approach is to set a common basis for a parallelization strategy, which can be extended to other split techniques or to compressible flows. The predictor-corrector scheme consists in solving the momentum equation and a modified 'continuity' equation (namely a simple iteration for the pressure Schur complement) consecutively in order to converge to the monolithic solution, thus avoiding fractional errors. On the other hand, the incremental projection scheme solves only one iteration of the predictor-corrector per time step and adds a correction equation to fulfill the mass conservation. As shown in the paper, these two schemes are very well suited for massively parallel implementation. In fact, when compared with monolithic schemes, simpler solvers and preconditioners can be used to solve the non-symmetric momentum equations (GMRES, Bi-CGSTAB) and to solve the symmetric continuity equation (CG, Deflated CG). This gives good speedup properties of the algorithm. The implementation of the mesh partitioning technique is presented, as well as the parallel performances and speedups for thousands of processors.

  12. Step-Stress Accelerated Degradation Testing for Solar Reflectors: Preprint

    SciTech Connect

    Jones, W.; Elmore, R.; Lee, J.; Kennedy, C.

    2011-09-01

    To meet the challenge to reduce the cost of electricity generated with concentrating solar power (CSP) new low-cost reflector materials are being developed including metalized polymer reflectors and must be tested and validated against appropriate failure mechanisms. We explore the application of testing methods and statistical inference techniques for quantifying estimates and improving lifetimes of concentrating solar power (CSP) reflectors associated with failure mechanisms initiated by exposure to the ultraviolet (UV) part of the solar spectrum. In general, a suite of durability and reliability tests are available for testing a variety of failure mechanisms where the results of a set are required to understand overall lifetime of a CSP reflector. We will focus on the use of the Ultra-Accelerated Weathering System (UAWS) as a testing device for assessing various degradation patterns attributable to accelerated UV exposure. Depending on number of samples, test conditions, degradation and failure patterns, test results may be used to derive insight into failure mechanisms, associated physical parameters, lifetimes and uncertainties. In the most complicated case warranting advanced planning and statistical inference, step-stress accelerated degradation (SSADT) methods may be applied.

  13. Predictive monitoring applied to generator step up transformers

    SciTech Connect

    Giesecke, J.L.; Colsher, R.J.

    1996-07-01

    Generator Step Up Transformers (GSU) are one of the most expensive and critical components in the power delivery system. The failure of a GSU can cost millions of dollars in lost revenue and equipment replacement costs, as well as create costly environmental complications. The predictive maintenance programs at most generating stations contain limited on-line condition monitoring of the GSUs and associated substation equipment. On-line testing usually consists of periodic visual inspections, oil testing, drive-by thermography and possibly some form of partial discharge detection. Monitoring of the GSU is often complicated by the ongoing question of responsibility between the plant maintenance programs and Transmission and Distribution Division maintenance programs. Most companies use a time-based preventive approach to transformer and substation maintenance. The time-based approach dictates maintenance scheduling strictly related to time in service and number of operations rather than on the condition of the equipment. This maintenance strategy, therefore, frequently directs maintenance to healthy equipment. Meanwhile, there may be equipment in trouble that is unscheduled for maintenance and bound for failure. This paper identifies elements of the EPRI Substation Predictive Maintenance Program and how they relate to GSUs and generating station switchyards. Included are some actual case examples.

  14. Guide to Community Energy Strategic Planning: Step 4 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    4 Guide to Community Energy Strategic Planning: Step 4 U.S. Department of Energy (DOE) Technical Assistance Program (TAP) Solution Center publishes this strategic energy planning guide for state and local governments. This links to Step 4. Community Energy Strategic Planning: Step 4- Full Chapter (581.22 KB) More Documents & Publications Guide to Community Energy Strategic Planning Guide to Community Energy Strategic Planning: Step 2

  15. Appendix C-8: Five Steps to Successful Energy Savings Performance Contracting Handout

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    8 April 2016 APPENDIX C-8: Five Steps to Successful Energy Savings Performance Contracting Handout Guidelines for a State ESPC Program C-8 | page 1 April 2016 Steps to Successful Energy Savings Performance Contracting Step 1 Decide if energy savings performance contracting (ESPC) is a good solution for you. Your first step is to consider how a performance contract would work for you. Review your facility needs, current staff capabilities, and the potential to make cost-saving facility

  16. Tunability of exchange bias in Ni@NiO core-shell nanoparticles obtained by sequential layer deposition

    SciTech Connect

    D'Addato, Sergio; Spadaro, Maria Chiara; Luches, Paola; Valeri, Sergio; Grillo, Vincenzo; Rotunno, Enzo; Roldan Gutierrez, Manuel A.; Pennycook, Stephen J.; Ferretti, Anna Maria; Capetti, Elena; Ponti, A.

    2015-01-01

    Films of magnetic Ni@NiO core–shell nanoparticles (NPs, core diameter d ≅ 12 nm, nominal shell thickness variable between 0 and 6.5 nm) obtained with sequential layer deposition were investigated, to gain insight into the relationships between shell thickness/morphology, core-shell interface, and magnetic properties. Different values of NiO shell thickness ts could be obtained while keeping the Ni core size fixed, at variance with conventional oxidation procedures where the oxide shell is grown at the expense of the core. Chemical composition, morphology of the as-produced samples and structural features of the Ni/NiO interface were investigated with x-ray photoelectron spectroscopy and microscopy (scanning electron microscopy, transmission electron microscopy) techniques, and related with results from magnetic measurements obtained with a superconducting quantum interference device. The effect of the shell thickness on the magnetic properties could be studied. The exchange bias (EB) field Hbias is small and almost constant for ts up to 1.6 nm; then it rapidly grows, with no sign of saturation. This behavior is clearly related to the morphology of the top NiO layer, and is mostly due to the thickness dependence of the NiO anisotropy constant. The ability to tune the EB effect by varying the thickness of the last NiO layer represents a step towards the rational design and synthesis of core–shell NPs with desired magnetic properties.

  17. SU-E-T-209: Independent Dose Calculation in FFF Modulated Fields with Pencil Beam Kernels Obtained by Deconvolution

    SciTech Connect

    Azcona, J; Burguete, J

    2014-06-01

    Purpose: To obtain the pencil beam kernels that characterize a megavoltage photon beam generated in a FFF linac by experimental measurements, and to apply them for dose calculation in modulated fields. Methods: Several Kodak EDR2 radiographic films were irradiated with a 10 MV FFF photon beam from a Varian True Beam (Varian Medical Systems, Palo Alto, CA) linac, at the depths of 5, 10, 15, and 20cm in polystyrene (RW3 water equivalent phantom, PTW Freiburg, Germany). The irradiation field was a 50 mm diameter circular field, collimated with a lead block. Measured dose leads to the kernel characterization, assuming that the energy fluence exiting the linac head and further collimated is originated on a point source. The three-dimensional kernel was obtained by deconvolution at each depth using the Hankel transform. A correction on the low dose part of the kernel was performed to reproduce accurately the experimental output factors. The kernels were used to calculate modulated dose distributions in six modulated fields and compared through the gamma index to their absolute dose measured by film in the RW3 phantom. Results: The resulting kernels properly characterize the global beam penumbra. The output factor-based correction was carried out adding the amount of signal necessary to reproduce the experimental output factor in steps of 2mm, starting at a radius of 4mm. There the kernel signal was in all cases below 10% of its maximum value. With this correction, the number of points that pass the gamma index criteria (3%, 3mm) in the modulated fields for all cases are at least 99.6% of the total number of points. Conclusion: A system for independent dose calculations in modulated fields from FFF beams has been developed. Pencil beam kernels were obtained and their ability to accurately calculate dose in homogeneous media was demonstrated.

  18. How to Obtain Authorization to Import and/or Export Natural Gas...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    How to Obtain Authorization to Import andor Export Natural Gas and LNG How to Obtain Authorization to Import andor Export Natural Gas and LNG LNG Exports | Long Terms | Blanket ...

  19. U-017: HP MFP Digital Sending Software Lets Local Users Obtain Potentially Sensitive Information

    Energy.gov [DOE]

    A vulnerability was reported in HP MFP Digital Sending Software. A local user can obtain potentially sensitive information.

  20. U-053: Linux kexec Bugs Let Local and Remote Users Obtain Potentially Sensitive Information

    Energy.gov [DOE]

    Several vulnerabilities were reported in Linux kexec. A remote or local user can obtain potentially sensitive information.

  1. Single-Step Ironmaking from Ore to Improve Energy Efficiency

    SciTech Connect

    S.K. Kawatra; B. Anamerie; T.C. Eisele

    2005-10-01

    The pig iron nugget process was developed as an alternative to the traditional blast furnace process by Kobe Steel. The process aimed to produce pig iron nuggets, which have similar chemical and physical properties to blast furnace pig iron, in a single step. The pig iron nugget process utilizes coal instead of coke and self reducing and fluxing dried green balls instead of pellets and sinters. In this process the environmental emissions caused by coke and sinter production, and energy lost between pellet induration (heat hardening) and transportation to the blast furnace can be eliminated. The objectives of this research were to (1) produce pig iron nuggets in the laboratory, (2) characterize the pig iron nugget produced and compare them with blast furnace pig iron, (3) investigate the furnace temperature and residence time effects on the pig iron nugget production, and (4) optimize the operational furnace temperatures and residence times. The experiments involved heat treatment of self reducing and fluxing dried green balls at various furnace temperatures and residence times. Three chemically and physically different products were produced after the compete reduction of iron oxides to iron depending on the operational furnace temperatures and/or residence times. These products were direct reduced iron (DRI), transition direct reduced iron (TDRI), and pig iron nuggets. The increase in the carbon content of the system as a function of furnace temperature and/or residence time dictated the formation of these products. The direct reduced iron, transition direct reduced iron, and pig iron nuggets produced were analyzed for their chemical composition, degree of metallization, apparent density, microstructure and microhardness. In addition, the change in the carbon content of the system with the changing furnace temperature and/or residence time was detected by optical microscopy and Microhardness measurements. The sufficient carbon dissolution required for the

  2. One-step room temperature synthesis of very small ?-Fe{sub 2}O{sub 3} nanoparticles

    SciTech Connect

    Moscoso-Londoo, O.; Carrio, M.S.; Cosio-Castaeda, C.; Bilovol, V.; Snchez, R. Martnez; Lede, E.J.; Socolovsky, L.M.; Martnez-Garca, R.

    2013-09-01

    Graphical abstract: - Highlights: One-step synthesis of 3 nm maghemite nanoparticles is reported. Maghemite nanoparticles can be synthesized from a ferric solution. ?-Fe{sub 2}O{sub 3} NPs can be obtained if the precursor has Fe(III) in tetrahedral interstices. HR-TEM, Mssbauer, XAFS and magnetometry analysis proved the maghemite existence - Abstract: Very small maghemite nanoparticles (?3 nm) are obtained through a one-step synthesis at room temperature. The fast neutralization reaction of a ferric solution in a basic medium produces an intermediate phase, presumably two-line ferrihydrite, which in oxidizing conditions is transformed to maghemite nanoparticles. The synthesis of maghemite, as final product of the reaction, was characterized by High-Resolution Transmission Electron Microscopy (HR-TEM), X-ray Absorption Fine Structure (XAFS), Mssbauer spectroscopy, and magnetometry. The XAFS technique allowed the analysis of the crystallographic variations into maghemite nanoparticles as a result of modification in its surface/volume ratio. Mssbauer spectroscopy at low temperature (4.2 K) confirms the presence of Fe(III) in tetrahedral and octahedral interstices, in the stoichiometry corresponding to maghemite. The specific magnetization, M vs H (3 K and 300 K, up to 7 T) and temperature dependence of the magnetization (50 Oe by ZFC mode, 2 K ? T ? 300 K) indicate that maghemite nanoparticles of 3 nm are in superparamagnetic state with a blocking temperature close to 36 K.

  3. Analysis on burnup step effect for evaluating reactor criticality and fuel breeding ratio

    SciTech Connect

    Saputra, Geby; Purnama, Aditya Rizki; Permana, Sidik; Suzuki, Mitsutoshi

    2014-09-30

    Criticality condition of the reactors is one of the important factors for evaluating reactor operation and nuclear fuel breeding ratio is another factor to show nuclear fuel sustainability. This study analyzes the effect of burnup steps and cycle operation step for evaluating the criticality condition of the reactor as well as the performance of nuclear fuel breeding or breeding ratio (BR). Burnup step is performed based on a day step analysis which is varied from 10 days up to 800 days and for cycle operation from 1 cycle up to 8 cycles reactor operations. In addition, calculation efficiency based on the variation of computer processors to run the analysis in term of time (time efficiency in the calculation) have been also investigated. Optimization method for reactor design analysis which is used a large fast breeder reactor type as a reference case was performed by adopting an established reactor design code of JOINT-FR. The results show a criticality condition becomes higher for smaller burnup step (day) and for breeding ratio becomes less for smaller burnup step (day). Some nuclides contribute to make better criticality when smaller burnup step due to individul nuclide half-live. Calculation time for different burnup step shows a correlation with the time consuming requirement for more details step calculation, although the consuming time is not directly equivalent with the how many time the burnup time step is divided.

  4. Extended step characteristic model for quarter-core gamma heating calculations

    SciTech Connect

    DeHart, M.D.; Webb, R.L. )

    1993-01-01

    Discrete ordinates codes are seldom used in lattice or core calculation, because of their limitation to simple geometries, which can be represented using an orthogonal mesh in a given coordinate system. Rough geometric approximations are often applied to obtain an estimate for a flux distribution. However, other methods, such as integral transport or Monte Carlo approaches, are generally more suited to irregular geometries. Each of these methods has its own weaknesses: integral transport methods are limited to problems in which the angular variation of the flux is isotropic or linearly anisotropic; Monte Carlo methods can be time consuming. The extended step characteristic (ESC) method has been developed to apply the discrete ordinates approximation to complicated geometries for which other methods provide less satisfactory solutions. The CENTAUR code has been developed to solve the two-dimensional transport equation using the ESC approach. This paper presents results of CENTAUR calculations for a quarter-core gamma redistribution problem for the Savannah River site (SRS) K reactor, under drained tank conditions following a postulated double-ended guillotine break loss-of-coolant accident. The calculations were used to confirm TWOTRAN calculations, which were based on a coarse approximation of the core geometry. A comparison of the results serves to demonstrate the capabilities and efficiency of the ESC approach.

  5. Enhancement of the photo conversion efficiencies in Cu(In,Ga)(Se,S){sub 2} solar cells fabricated by two-step sulfurization process

    SciTech Connect

    Yang, JungYup; Nam, Junggyu; Kim, Dongseop; Lee, Dongho E-mail: ddang@korea.ac.kr; Kim, GeeYeong; Jo, William; Kang, Yoonmook E-mail: ddang@korea.ac.kr

    2015-11-09

    Cu(In,Ga)(Se,S){sub 2} (CIGSS) absorber layers were fabricated by using a modified two-stage sputter and a sequential selenization/sulfurization method, and the sulfurization process is changed from one-step to two-step. The two-step sulfurization was controlled with two different H{sub 2}S gas concentrations during the sulfurization treatment. This two-step process yielded remarkable improvements in the efficiency (+0.7%), open circuit voltage (+14 mV), short circuit current (+0.23 mA/cm{sup 2}), and fill factor (+0.21%) of a CIGSS device with 30 × 30 cm{sup 2} in size, owing to the good passivation at the grain boundary surface, uniform material composition among the grain boundaries, and modified depth profile of Ga and S. The deterioration of the P/N junction quality was prevented by the optimized S content in the CIGSS absorber layer. The effects of the passivation quality at the grain boundary surface, the material uniformity, the compositional depth profiles, the microstructure, and the electrical characteristics were examined by Kelvin probe force microscopy, X-ray diffraction, secondary ion mass spectrometry, scanning electron microscopy, and current-voltage curves, respectively. The two-step sulfurization process is experimentally found to be useful for obtaining good surface conditions and, enhancing the efficiency, for the mass production of large CIGSS modules.

  6. How to save money on monthly gas utility bills for public-housing agencies: A simple step-by-step procedure

    SciTech Connect

    Ryan, R.S.

    1990-01-01

    This manual gives a step-by-step procedure that managers of HUD-associated housing projects can use to buy gas at the wellhead and have it transported to the point of use via the pipeline and the local distribution company. This procedure can be used to reduce the costs of natural gas used at public-housing units. The concept is commonly referred to as 'carriage gas'.

  7. U-053: Linux kexec Bugs Let Local and Remote Users Obtain Potentially...

    Office of Environmental Management (EM)

    Linux kexec Bugs Let Local and Remote Users Obtain Potentially Sensitive Information . PLATFORM: Red Hat Enterprise Linux Desktop (v. 6) Red Hat Enterprise Linux HPC Node (v. 6) ...

  8. Systematic Flights Obtain Long-Term Data Set of Cloud Properties

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    instrumentation to complete routine flights over the SGP site and obtain representative statistics of cloud microphysical, aerosol, and radiative properties of the atmosphere. ...

  9. Energy Department Takes First Step to Spur U.S. Manufacturing of Small

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Modular Nuclear Reactors | Department of Energy Takes First Step to Spur U.S. Manufacturing of Small Modular Nuclear Reactors Energy Department Takes First Step to Spur U.S. Manufacturing of Small Modular Nuclear Reactors January 20, 2012 - 10:48am Addthis Washington, D.C. - The U.S. Department of Energy today announced the first step toward manufacturing small modular nuclear reactors (SMRs) in the United States, demonstrating the Administration's commitment to advancing U.S. manufacturing

  10. Energy Department Takes First Step to Spur U.S. Manufacturing of Small

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Modular Nuclear Reactors | Department of Energy Takes First Step to Spur U.S. Manufacturing of Small Modular Nuclear Reactors Energy Department Takes First Step to Spur U.S. Manufacturing of Small Modular Nuclear Reactors January 20, 2012 - 2:06pm Addthis The U.S. Department of Energy today announced the first step toward manufacturing small modular nuclear reactors (SMRs) in the United States, demonstrating the Administration's commitment to advancing U.S. manufacturing leadership in

  11. A Big Step Increase in the EM Technology Development (TD) Program - Opening

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    | Department of Energy Opening A Big Step Increase in the EM Technology Development (TD) Program - Opening Presentation from the 2015 DOE National Cleanup Workshop by Rod Rimando, Senior Technical Adviser, DOE-EM. A Big Step Increase in the EM Technology Development (TD) Program - Opening (2.05 MB) More Documents & Publications A Big Step Increase in the EM Technology Development (TD) Program - Closing Office of River Protection (ORP) and Washingotn River Protection Solutions, LLC (WRPS)

  12. Obama Announces Steps to Boost Biofuels, Clean Coal | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Announces Steps to Boost Biofuels, Clean Coal Obama Announces Steps to Boost Biofuels, Clean Coal February 3, 2010 - 12:00am Addthis WASHINGTON - President Barack Obama today announced a series of steps his Administration is taking as part of its comprehensive strategy to enhance American energy independence while building a foundation for a new clean energy economy, and its promise of new industries and millions of jobs. At a meeting with a bipartisan group of governors from around the country,

  13. Obama Officials Announce Steps to Promote the Clean Energy Potential of the

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    West | Department of Energy Obama Officials Announce Steps to Promote the Clean Energy Potential of the West Obama Officials Announce Steps to Promote the Clean Energy Potential of the West June 15, 2009 - 12:00am Addthis PARK CITY, UTAH - Senior Obama Administration officials today announced a number of steps that will help the West to tap its clean energy potential and create green jobs. The efforts announced during the annual meeting of the Western Governors' Association (WGA) reflect a

  14. Guide to Community Energy Strategic Planning: Step 6 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    6 Guide to Community Energy Strategic Planning: Step 6 U.S. Department of Energy (DOE) Technical Assistance Program (TAP) Solution Center publishes this strategic energy planning guide for state and local governments. This links to Step 6. Guide to Community Energy Strategic Planning: Step 6- Full Chapter (656.97 KB) More Documents & Publications Guide to Community Energy Strategic Planning Guide to Community Energy Strategic Planning: Introduction Tool 0.1: CESP Planning Worksheet

  15. Obama Announces Steps to Boost Biofuels, Clean Coal | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Announces Steps to Boost Biofuels, Clean Coal Obama Announces Steps to Boost Biofuels, Clean Coal February 3, 2010 - 12:00pm Addthis Washington, D.C. - President Barack Obama today announced a series of steps his Administration is taking as part of its comprehensive strategy to enhance American energy independence while building a foundation for a new clean energy economy, and its promise of new industries and millions of jobs. At a meeting with a bipartisan group of governors from around the

  16. Obama Officials Announce Steps to Promote the Clean Energy Potential of the

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    West | Department of Energy Obama Officials Announce Steps to Promote the Clean Energy Potential of the West Obama Officials Announce Steps to Promote the Clean Energy Potential of the West June 15, 2009 - 4:03pm Addthis Secretaries Chu, Salazar and Vilsack and Chairs Sutley and Wellinghoff announce energy and transmission policies at the Western Governors' Association Annual Meeting PARK CITY, UTAH - Senior Obama Administration officials today announced a number of steps that will help the

  17. Steps to Establish a Real-Time Transmission Monitoring System for

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Transmission Owners and Operators within the Eastern and Western Interconnections | Department of Energy Steps to Establish a Real-Time Transmission Monitoring System for Transmission Owners and Operators within the Eastern and Western Interconnections Steps to Establish a Real-Time Transmission Monitoring System for Transmission Owners and Operators within the Eastern and Western Interconnections Steps to establish a real-time transmission monitoring system for transmission owners and

  18. Bernhard Mecking steps down as Hall B leader at Jefferson Lab | Jefferson

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Lab Bernhard Mecking steps down as Hall B leader at Jefferson Lab Bernhard Mecking Jefferson Lab staff scientist Bernhard Mecking with the CEBAF Large Acceptance Spectrometer (CLAS) in Hall B. Bernhard Mecking steps down as Hall B leader at Jefferson Lab April 2, 2003 On 1 February 2003, Bernhard Mecking stepped down as leader of Hall B to return to full-time research at the Department of Energy's Thomas Jefferson National Accelerator Facility (Jefferson Lab) in Newport News, Virginia.

  19. First Step to Spur U.S. Manufacturing of Small Modular Nuclear Reactors

    Energy.gov [DOE]

    The Energy Department recently announced the first step toward manufacturing small modular nuclear reactors (SMRs) in the United States, demonstrating the Administration’s commitment to advancing U...

  20. A Technical and Economic Analysis of an Innovative Two-Step Absorption...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Economic Analysis of an Innovative Two-Step Absorption System for Utilizing Low-Temperature Geothermal Resources to Condition Commercial Buildings A Technical and Economic Analysis ...

  1. Capturing and Converting CO2 in a Single Step | U.S. DOE Office...

    Office of Science (SC)

    Capturing and Converting CO2 in a Single Step Researchers computationally design a cheap, ... carbon dioxide should provide design strategies for efficient, less expensive catalysts. ...

  2. Surface Modified Particles By Multi-Step Addition And Process For The Preparation Thereof

    DOEpatents

    Cook, Ronald Lee; Elliott, Brian John; Luebben, Silvia DeVito; Myers, Andrew William; Smith, Bryan Matthew

    2006-01-17

    The present invention relates to a new class of surface modified particles and to a multi-step surface modification process for the preparation of the same. The multi-step surface functionalization process involves two or more reactions to produce particles that are compatible with various host systems and/or to provide the particles with particular chemical reactivities. The initial step comprises the attachment of a small organic compound to the surface of the inorganic particle. The subsequent steps attach additional compounds to the previously attached organic compounds through organic linking groups.

  3. Tribal Strategic Energy Planning Provides a Step in the Right Direction

    Energy.gov [DOE]

    The DOE Office of Indian Energy has developed a nine-step strategic energy planning process that gives Tribes a road map to success.

  4. Initial chemical steps in the low-temperature oxidation of25...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Initial chemical steps in the low-temperature oxidation of 25-dimethylhexane. Citation Details ... Publication Date: 2014-01-01 OSTI Identifier: 1140626 Report ...

  5. Multienergy CT acquisition and reconstruction with a stepped tube potential scan

    SciTech Connect

    Shen, Le; Xing, Yuxiang

    2015-01-15

    Purpose: Based on an energy-dependent property of matter, one may obtain a pseudomonochromatic attenuation map, a material composition image, an electron-density distribution, and an atomic number image using a dual- or multienergy computed tomography (CT) scan. Dual- and multienergy CT scans broaden the potential of x-ray CT imaging. The development of such systems is very useful in both medical and industrial investigations. In this paper, the authors propose a new dual- and multienergy CT system design (segmental multienergy CT, SegMECT) using an innovative scanning scheme that is conveniently implemented on a conventional single-energy CT system. The two-step-energy dual-energy CT can be regarded as a special case of SegMECT. A special reconstruction method is proposed to support SegMECT. Methods: In their SegMECT, a circular trajectory in a CT scan is angularly divided into several arcs. The x-ray source is set to a different tube voltage for each arc of the trajectory. Thus, the authors only need to make a few step changes to the x-ray energy during the scan to complete a multienergy data acquisition. With such a data set, the image reconstruction might suffer from severe limited-angle artifacts if using conventional reconstruction methods. To solve the problem, they present a new prior-image-based reconstruction technique using a total variance norm of a quotient image constraint. On the one hand, the prior extracts structural information from all of the projection data. On the other hand, the effect from a possibly imprecise intensity level of the prior can be mitigated by minimizing the total variance of a quotient image. Results: The authors present a new scheme for a SegMECT configuration and establish a reconstruction method for such a system. Both numerical simulation and a practical phantom experiment are conducted to validate the proposed reconstruction method and the effectiveness of the system design. The results demonstrate that the proposed Seg

  6. Method and apparatus for obtaining enhanced production rate of thermal chemical reactions

    DOEpatents

    Tonkovich, Anna Lee Y.; Wang, Yong; Wegeng, Robert S.; Gao, Yufei

    2003-09-09

    Reactors and processes are disclosed that can utilize high heat fluxes to obtain fast, steady-state reaction rates. Porous catalysts used in conjunction with microchannel reactors to obtain high rates of heat transfer are also disclosed. Reactors and processes that utilize short contact times, high heat flux and low pressure drop are described. Improved methods of steam reforming are also provided.

  7. Method and apparatus for obtaining enhanced production rate of thermal chemical reactions

    DOEpatents

    Tonkovich, Anna Lee Y.; Wang, Yong; Wegeng, Robert S.; Gao, Yufei

    2006-05-16

    Reactors and processes are disclosed that can utilize high heat fluxes to obtain fast, steady-state reaction rates. Porous catalysts used in conjunction with microchannel reactors to obtain high rates of heat transfer are also disclosed. Reactors and processes that utilize short contact times, high heat flux and low pressure drop are described. Improved methods of steam reforming are also provided.

  8. Process for obtaining multiple sheet resistances for thin film hybrid microcircuit resistors

    DOEpatents

    Norwood, David P.

    1989-01-01

    A standard thin film circuit containing Ta.sub.2 N (100 ohms/square) resirs is fabricated by depositing on a dielectric substrate successive layers of Ta.sub.2 N, Ti and Pd, with a gold layer to provide conductors. The addition of a few simple photoprocessing steps to the standeard TFN manufacturing process enables the formation of Ta.sub.2 N+Ti (10 ohms/square) and Ta.sub.2 N+Ti+Pd (1 ohm/square) resistors in the same otherwise standard thin film circuit structure.

  9. U-118: Adobe Flash Player Bugs Let Remote Users Execute Arbitrary Code and Obtain Information

    Energy.gov [DOE]

    Two vulnerabilities were reported in Adobe Flash Player. A remote user can cause arbitrary code to be executed on the target user's system. A remote user can obtain potentially information.

  10. Title 43 CFR 3204.5 How Can I Obtain a Noncompetitive Lease?...

    OpenEI (Open Energy Information) [EERE & EIA]

    5 How Can I Obtain a Noncompetitive Lease? Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- Federal RegulationFederal Regulation: Title 43 CFR...

  11. T-652: Mozilla Thunderbird Bugs Let Remote Users Obtain Cookies and Execute Arbitrary Code

    Energy.gov [DOE]

    Multiple vulnerabilities were reported in Mozilla Thunderbird. A remote user can cause arbitrary code to be executed on the target user's system. A remote user can obtain cookies from another domain in certain cases.

  12. Design of step composition gradient thin film transistor channel layers grown by atomic layer deposition

    SciTech Connect

    Ahn, Cheol Hyoun; Hee Kim, So; Gu Yun, Myeong; Koun Cho, Hyung

    2014-12-01

    In this study, we proposed the artificially designed channel structure in oxide thin-film transistors (TFTs) called a “step-composition gradient channel.” We demonstrated Al step-composition gradient Al-Zn-O (AZO) channel structures consisting of three AZO layers with different Al contents. The effects of stacking sequence in the step-composition gradient channel on performance and electrical stability of bottom-gate TFT devices were investigated with two channels of inverse stacking order (ascending/descending step-composition). The TFT with ascending step-composition channel structure (5 → 10 → 14 at. % Al composition) showed relatively negative threshold voltage (−3.7 V) and good instability characteristics with a reduced threshold voltage shift (Δ 1.4 V), which was related to the alignment of the conduction band off-set within the channel layer depending on the Al contents. Finally, the reduced Al composition in the initial layer of ascending step-composition channel resulted in the best field effect mobility of 4.5 cm{sup 2}/V s. We presented a unique active layer of the “step-composition gradient channel” in the oxide TFTs and explained the mechanism of adequate channel design.

  13. Magnesite Step Growth Rates as a Function of the Aqueous Magnesium:Carbonate Ratio

    DOE PAGES [OSTI]

    Bracco, Jacquelyn N.; Stack, Andrew G.; Higgins, Steven R.

    2014-10-01

    Step velocities of monolayer-height steps on the (101⁻4) magnesite surface have been measured as functions of the aqueous magnesium-to-carbonate ratio and saturation index (SI) using a hydrothermal atomic force microscope (HAFM). At SI ≤ 1.9 and 80-90 °C, step velocities were found to be invariant with changes in the magnesium-to-carbonate ratio, an observation in contrast with standard models for growth and dissolution of ionically-bonded, multi-component crystals. However, at high saturation indices (SI = 2.15), step velocities displayed a ratio dependence, maximized at magnesium-to-carbonate ratios slightly greater than 1:1. Traditional affinity-based models were unable to describe growth rates at the highermore » saturation index. Step velocities also could not be modeled solely through nucleation of kink sites, in contrast to other minerals whose bonding between constituent ions is also dominantly ionic in nature, such as calcite and barite. Instead, they could be described only by a model that incorporates both kink nucleation and propagation. Based on observed step morphological changes at these higher saturation indices, the step velocity maximum at SI = 2.15 is likely due to the rate of attachment to propagating kink sites overcoming the rate of detachment from kink sites as the latter becomes less significant under far from equilibrium conditions.« less

  14. Question of the Week: What Steps Do You Take to Be Safe and Efficient when

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Driving in the Winter? | Department of Energy What Steps Do You Take to Be Safe and Efficient when Driving in the Winter? Question of the Week: What Steps Do You Take to Be Safe and Efficient when Driving in the Winter? January 15, 2009 - 8:18am Addthis It's extremely cold and snowy in many parts of the country this week! Winter weather conditions can make driving a challenge, and we hope you're staying safe on the road while still keeping efficient driving in mind. What steps do you take to

  15. Energy and Defense Departments Announce New Steps to Enhance Cooperation on

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Clean Energy and Energy Security | Department of Energy New Steps to Enhance Cooperation on Clean Energy and Energy Security Energy and Defense Departments Announce New Steps to Enhance Cooperation on Clean Energy and Energy Security March 2, 2011 - 12:00am Addthis Washington, D.C. - Building on already strong cooperation between the U.S. Department of Energy and the U.S. Department of Defense, U.S. Secretary of the Navy Ray Mabus announced today new steps between the Departments to

  16. Transparent TiO2 nanotube array photoelectrodes prepared via two-step

    Office of Scientific and Technical Information (OSTI)

    anodization (Journal Article) | DOE PAGES Transparent TiO2 nanotube array photoelectrodes prepared via two-step anodization Title: Transparent TiO2 nanotube array photoelectrodes prepared via two-step anodization Two-step anodization of transparent TiO2 nanotube arrays has been demonstrated with aid of a Nb-doped TiO2 buffer layer deposited between the Ti layer and TCO substrate. Enhanced physical adhesion and electrochemical stability provided by the buffer layer has been found to be

  17. Department of Energy and FutureGen Alliance Discuss Next Steps for

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    FutureGen 2.0 in Illinois | Department of Energy FutureGen Alliance Discuss Next Steps for FutureGen 2.0 in Illinois Department of Energy and FutureGen Alliance Discuss Next Steps for FutureGen 2.0 in Illinois August 19, 2010 - 12:00am Addthis Washington, DC - At a meeting today in Chicago, officials from the Department of Energy, the state of Illinois, Ameren, Babcock & Wilcox, American Air Liquide and the FutureGen Alliance discussed the next steps for the FutureGen 2.0 carbon capture

  18. Calculation tool for transported geothermal energy using two-step absorption process

    DOE Data Explorer

    Kyle Gluesenkamp

    2016-02-01

    This spreadsheet allows the user to calculate parameters relevant to techno-economic performance of a two-step absorption process to transport low temperature geothermal heat some distance (1-20 miles) for use in building air conditioning. The parameters included are (1) energy density of aqueous LiBr and LiCl solutions, (2) transportation cost of trucking solution, and (3) equipment cost for the required chillers and cooling towers in the two-step absorption approach. More information is available in the included public report: "A Technical and Economic Analysis of an Innovative Two-Step Absorption System for Utilizing Low-Temperature Geothermal Resources to Condition Commercial Buildings"

  19. How to Obtain Authorization to Import and/or Export Natural Gas and LNG |

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Department of Energy How to Obtain Authorization to Import and/or Export Natural Gas and LNG How to Obtain Authorization to Import and/or Export Natural Gas and LNG LNG Exports | Long Terms | Blanket Authorizations | Vacate | Name Change | Contents of Application | FTA and non-FTA Countries Background Section 3 of the Natural Gas Act (NGA) (15 U.S.C. § 717b) prohibits the import or export of natural gas, including liquefied natural gas (LNG) from or to a foreign country without prior

  20. Process For Cutting Polymers Electrolyte Multi-Layer Batteries And Batteries Obtained Thereby

    DOEpatents

    Gauthier, Michel; Lessard, Ginette; Dussault, Gaston; Rouillard, Roger; Simoneau, Martin; Miller, Alan Paul

    2003-09-09

    A stacking of battery laminate is prepared, each battery consisting of anode, polymer electrolyte, cathode films and possibly an insulating film, under conditions suitable to constitute a rigid monoblock assembly, in which the films are unitary with one another. The assembly obtained is thereafter cut in predetermined shape by using a mechanical device without macroscopic deformation of the films constituting the assembly and without inducing permanent short circuits. The battery which is obtained after cutting includes at least one end which appears as a uniform cut, the various films constituting the assembly having undergone no macroscopic deformation, the edges of the films of the anode including an electronically insulating passivation film.

  1. The atomic structure and chemistry of Fe-rich steps on antiphase...

    Office of Scientific and Technical Information (OSTI)

    The core of these steps is found to consist of 4 edge-sharing FeOsub 6 octahedra. The structure is confirmed by image simulations using a frozen phonon multislice approach. The ...

  2. Question of the Week: What Steps Do You Take to Be Safe and Efficient...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Winter weather conditions can make driving a challenge, and we hope you're staying safe on the road while still keeping efficient driving in mind. What steps do you take to be safe ...

  3. STEP-UP Coaches a University Park Family to Comfort and Savings...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    What statistics fail to convey is the feeling of not wanting to remove your coat when you walk in the door, the dread of stepping onto cold tile in the morning, and your dismay as ...

  4. A Split-Step Scheme for the Incompressible Navier-Stokes

    SciTech Connect

    Henshaw, W; Petersson, N A

    2001-06-12

    We describe a split-step finite-difference scheme for solving the incompressible Navier-Stokes equations on composite overlapping grids. The split-step approach decouples the solution of the velocity variables from the solution of the pressure. The scheme is based on the velocity-pressure formulation and uses a method of lines approach so that a variety of implicit or explicit time stepping schemes can be used once the equations have been discretized in space. We have implemented both second-order and fourth-order accurate spatial approximations that can be used with implicit or explicit time stepping methods. We describe how to choose appropriate boundary conditions to make the scheme accurate and stable. A divergence damping term is added to the pressure equation to keep the numerical dilatation small. Several numerical examples are presented.

  5. World-Record Solar Cell a Step Closer to Cheap Solar Energy

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    World-Record Solar Cell a Step Closer to Cheap Solar Energy For more information contact: George Douglas (303) 275-4096 e:mail: georgedouglas@nrel.gov Golden, Colo., Feb. 25, 1999 ...

  6. Buying the Perfect Energy-Efficient Light Bulb in 5 Easy Steps

    Energy.gov [DOE]

    Purchasing an energy-efficient light bulb doesn't have to be difficult. With these five easy steps, you can find the best energy-efficient light bulb for your home!

  7. A.J. Stewart Smith to step down as Princeton University vice...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Smith to step down as Princeton University vice president for PPPL in 2016 By John Greenwald July 24, 2015 Tweet Widget Google Plus One Share on Facebook A.J. Stewart Smith (Photo ...

  8. Steps to Make Sure You Get JLab Severe Weather Status Notices | Jefferson

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Lab Steps to Make Sure You Get JLab Severe Weather Status Notices Steps to Make Sure You Get JLab Severe Weather Status Notices Staff, Users Can Receive JLab Site-Wide Alert Pager Messages on Personal Mobile Phones Staff and Users: You may receive Jefferson Lab Site-Wide Alert pager messages on your personal mobile phone. These messages could include severe weather advisories, laboratory closing and delayed opening notices and other types of emergency messages. To register your mobile phone

  9. Salazar, Chu Announce Next Step in Nation's March toward Renewable Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Future | Department of Energy Announce Next Step in Nation's March toward Renewable Energy Future Salazar, Chu Announce Next Step in Nation's March toward Renewable Energy Future December 16, 2010 - 12:00am Addthis WASHINGTON - Today Secretary of the Interior Ken Salazar and Secretary of Energy Steven Chu announced a comprehensive environmental analysis that has identified proposed 'solar energy zones' on public lands in six western states most suitable for environmentally sound,

  10. Secretary Chu Announces Steps to Implement Cool Roofs at DOE and Across the

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Federal Government | Department of Energy Steps to Implement Cool Roofs at DOE and Across the Federal Government Secretary Chu Announces Steps to Implement Cool Roofs at DOE and Across the Federal Government July 19, 2010 - 12:00am Addthis Washington - U.S. Department of Energy Secretary Steven Chu today announced a series of initiatives underway at the Department of Energy to more broadly implement cool roof technologies on DOE facilities and buildings across the federal government. Cool

  11. Ingrid Kolb, Director, Office of Management Section I: Steps Taken to Apply the Presumption of Openness

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    2016 Chief Freedom of Information Act (FOIA) Officer Report Ingrid Kolb, Director, Office of Management Section I: Steps Taken to Apply the Presumption of Openness The guiding principle underlying the President's FOIA Memorandum and the Attorney General's FOIA Guidelines is the presumption of openness. Describe the steps your agency has taken to ensure that the presumption of openness is being applied to all decisions involving the FOIA. To do so, you should answer the questions listed below

  12. Institutional Change Process Step 3: Develop an Action Plan | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy 3: Develop an Action Plan Institutional Change Process Step 3: Develop an Action Plan Graphic of the Institutional Change Continuous Improvement Process gear. The steps begin with Determine Goals and move to Assess Institutional Rules, Roles and Tools then to Develop Action Plan then to Implement Plan then finally to Measure and Evaluate. The process begins again with Determine Goals. Determine Goals Develop Action Plan Implement Plan Measure and Evaluate Assess Institutional Rules,

  13. A Big Step Increase in the EM Technology Development (TD) Program - Closing

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    | Department of Energy Closing A Big Step Increase in the EM Technology Development (TD) Program - Closing Presentation from the 2015 DOE National Cleanup Workshop by Rod Rimando, Senior Technical Adviser, DOE-EM. A Big Step Increase in the EM Technology Development (TD) Program - Closing (7.58 MB) More Documents & Publications NSU Norfolk State University Nuclear Rocket Development Station at the Nevada Test Site National Laboratory Concentrating Solar Power Research and Development

  14. Algae Raceway Testing Facility Brings Algal Biofuels One Step Closer to

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Reality | Department of Energy Algae Raceway Testing Facility Brings Algal Biofuels One Step Closer to Reality Algae Raceway Testing Facility Brings Algal Biofuels One Step Closer to Reality February 18, 2016 - 11:25am Addthis (From left to right) BETO Technology Manager Daniel Fishman, and Program Manager Alison Goss Eng, Livermore Mayor John March, Sandia National Laboratories Vice President Marianne Walck, California State Assembly Catharine Baker, and Chief Scientific and Technology

  15. GAO Cost Estimating and Assessment Guide Twelve Steps of a High-Quality Cost Estimating Process

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    GAO Cost Estimating and Assessment Guide Twelve Steps of a High-Quality Cost Estimating Process Step Description Associated task 1 Define estimate's purpose Determine estimate's purpose, required level of detail, and overall scope; Determine who will receive the estimate 2 Develop estimating plan Determine the cost estimating team and develop its master schedule; Determine who will do the independent cost estimate; Outline the cost estimating approach; Develop the estimate timeline 3 Define

  16. DOE Steps Lead to Significant Increase in Compliance with Energy Efficiency

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Reporting Requirements | Department of Energy Steps Lead to Significant Increase in Compliance with Energy Efficiency Reporting Requirements DOE Steps Lead to Significant Increase in Compliance with Energy Efficiency Reporting Requirements January 12, 2010 - 12:00am Addthis WASHINGTON DC - The Department of Energy announced today that it has received certifications for over 600,000 residential appliances in 15 different product categories in response to the Department's enhanced energy

  17. A Technical and Economic Analysis of an Innovative Two-Step Absorption

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    System for Utilizing Low-Temperature Geothermal Resources to Condition Commercial Buildings | Department of Energy A Technical and Economic Analysis of an Innovative Two-Step Absorption System for Utilizing Low-Temperature Geothermal Resources to Condition Commercial Buildings A Technical and Economic Analysis of an Innovative Two-Step Absorption System for Utilizing Low-Temperature Geothermal Resources to Condition Commercial Buildings A Technical and Economic Analysis of an Innovative

  18. A One-Step Method for Depositing Highly Conductive Lead Chalcogenide

    Office of Scientific and Technical Information (OSTI)

    Quantum Dot Films (Conference) | SciTech Connect A One-Step Method for Depositing Highly Conductive Lead Chalcogenide Quantum Dot Films Citation Details In-Document Search Title: A One-Step Method for Depositing Highly Conductive Lead Chalcogenide Quantum Dot Films Authors: Lin, Qianglu [1] ; Liu, Wenyong [1] ; Pietryga, Jeffrey Michael [1] ; Yun, Hyeong Jin [1] ; Klimov, Victor Ivanovich [1] + Show Author Affiliations Los Alamos National Laboratory Publication Date: 2016-03-30 OSTI

  19. #WomenInSTEM: Stepping Stones From One Career to Another | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Stepping Stones From One Career to Another #WomenInSTEM: Stepping Stones From One Career to Another November 24, 2014 - 10:30am Addthis Watch our latest #WomenInSTEM profile of Cheryl Martin, Acting Director of the Advanced Research Projects Agency for Energy (ARPA-E). | Video by Matty Greene. Matty Greene Matty Greene Former Videographer Allison Lantero Allison Lantero Digital Content Specialist, Office of Public Affairs Meet Cheryl Martin, Acting Director of the Advanced Research

  20. Mimicking Nature - A Step Towards Artificial Photosynthesis| U.S. DOE

    Office of Science (SC)

    Office of Science (SC) Mimicking Nature - A Step Towards Artificial Photosynthesis Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights Highlight Archives News & Events Publications History Contact BES Home 05.03.12 Mimicking Nature - A Step Towards Artificial Photosynthesis Print Text Size: A A A FeedbackShare Page Scientific Achievement Built a synthetic light harvesting antenna which mimics those found in photosynthetic bacteria Significance and

  1. Step change in Fuel Efficiency:Eaton's perspective | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Step change in Fuel Efficiency:Eaton's perspective Step change in Fuel Efficiency:Eaton's perspective Perspective on truck fuel efficiency challenges and approaches to increasing fuel efficiency deer12_stover.pdf (1.1 MB) More Documents & Publications Model-Based Transient Calibration Optimization for Next Generation Diesel Engines Compact, electro-hydraulic, variable valve actuation system providing variable lift, timing and duration to enable high efficiency engine combustion control Bosch

  2. April 23 Webinar to Examine First Two Steps of Tribal Energy Project

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Development Process | Department of Energy 23 Webinar to Examine First Two Steps of Tribal Energy Project Development Process April 23 Webinar to Examine First Two Steps of Tribal Energy Project Development Process April 17, 2014 - 6:17pm Addthis The U.S. Department of Energy (DOE) Office of Indian Energy, the DOE Office of Energy Efficiency and Renewable Energy's Tribal Energy Program, and the Western Area Power Administration (Western) will present the next Tribal Renewable Energy Series

  3. The Radial Distribution Function (RDF) of Amorphous Selenium Obtained through the Vacuum Evaporator

    SciTech Connect

    Guda, Bardhyl; Dede, Marie

    2010-01-21

    After the amorphous selenium obtained through the vacuum evaporator, the relevant diffraction intensity is taken and its processing is made. Further on the interferential function is calculated and the radial density function is defined. For determining these functions are used two methods, which were compared with each other and finally are received results for amorphous selenium RDF.

  4. Hydrodynamic equations for electrons in graphene obtained from the maximum entropy principle

    SciTech Connect

    Barletti, Luigi

    2014-08-15

    The maximum entropy principle is applied to the formal derivation of isothermal, Euler-like equations for semiclassical fermions (electrons and holes) in graphene. After proving general mathematical properties of the equations so obtained, their asymptotic form corresponding to significant physical regimes is investigated. In particular, the diffusive regime, the Maxwell-Boltzmann regime (high temperature), the collimation regime and the degenerate gas limit (vanishing temperature) are considered.

  5. SPECKLE INTERFEROMETRY AT THE USNO FLAGSTAFF STATION: OBSERVATIONS OBTAINED IN 2008 AND NINE NEW ORBITS

    SciTech Connect

    Hartkopf, William I.; Mason, Brian D. E-mail: bdm@usno.navy.mil

    2011-08-15

    Results are presented for 299 speckle interferometric observations of double stars, obtained in 2008 at the USNO Flagstaff Station using the 1.55 m Kaj Strand Astrometric Reflector. Separations range from 0.''15 to 9.''88, with a median of 2.''22. This observing run concentrated on neglected systems, as well as systems in need of improved orbital elements; new orbital solutions have been determined for nine systems as a result.

  6. Method for making graded I-III-VI.sub.2 semiconductors and solar cell obtained thereby

    DOEpatents

    Devaney, Walter E.

    1987-08-04

    Improved cell photovoltaic conversion efficiencies are obtained by the simultaneous elemental reactive evaporation process of Mickelsen and Chen for making semiconductors by closer control of the evaporation rates and substrate temperature during formation of the near contact, bulk, and near junction regions of a graded I-III-VI.sub.2, thin film, semiconductor, such as CuInSe.sub.2 /(Zn,Cd)S or another I-III-VI.sub.2 /II-VI heterojunction.

  7. Electron beam method and apparatus for obtaining uniform discharges in electrically pumped gas lasers

    DOEpatents

    Fenstermacher, Charles A.; Boyer, Keith

    1986-01-01

    A method and apparatus for obtaining uniform, high-energy, large-volume electrical discharges in the lasing medium of a gas laser whereby a high-energy electron beam is used as an external ionization source to ionize substantially the entire volume of the lasing medium which is then readily pumped by means of an applied potential less than the breakdown voltage of the medium. The method and apparatus are particularly useful in CO.sub.2 laser systems.

  8. Lab obtains approval to begin design on new radioactive waste staging

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    facility New radioactive waste staging facility Lab obtains approval to begin design on new radioactive waste staging facility The 4-acre complex will include multiple staging buildings plus an operations center and a concrete pad for mobile waste characterization equipment. September 1, 2010 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience,

  9. Two new frameworks of potassium saccharate obtained from acidic and alkaline solution

    SciTech Connect

    Lv, Yao-Kang; Feng, Yun-Long; Liu, Ji-Wei; Jiang, Zhan-Guo

    2011-05-15

    Two chiral K(I) complexes based on D-saccharic acid (H{sub 2}sac), [K(Hsac)]{sub n} (1) and [K{sub 2}(sac)]{sub n} (2) were obtained from acidic and alkaline solution. The 3D framework of 1 includes K(I) polyhedral rods and typical pairwise coaxial right- and left-handed helical chains, and displays binodal 6-connected pcu topology. 2 contains 2D polyhedral sheets consisting of left-handed helical chains, and generates 3D network with an unprecedented (7,11)-connected net. Cyclic voltammetry tests and charge-discharge tests indicate that the addition of complex 2 to the electrolyte could improve the electrochemical properties of the nickel hydroxide electrode. -- Graphical abstract: Two K(I) complexes based on D-saccharic acid (H{sub 2}sac), [K(Hsac)]{sub n} (1) and [K{sub 2}(sac)]{sub n} (2) were obtained and characterized. Electrochemical studies indicate the potential use of 2 in Ni-MH battery. Display Omitted highlights: > Two novel chiral K(I) frameworks based on D-saccharic acid were obtained. > The structure of 1 includes K(I) polyhedral rods and typical helical chains. > 2 contains 2D polyhedral sheets and generates an unprecedented (7,11)-connected net. > Addition of 2 to electrolyte could improve the nickel hydroxide electrode's property.

  10. A fast route to obtain manganese spinel nanoparticles by reduction of K-birnessite

    SciTech Connect

    Giovannelli, F.; Chartier, T.; Autret-Lambert, C.; Delorme, F.; Zaghrioui, M.; Seron, A.

    2009-05-15

    The K-birnessite (K{sub x}MnO{sub 2}.yH{sub 2}O) reduction reaction has been tested in order to obtain manganese spinel nanoparticles. The addition of 0.25 weight percent of hydrazine hydrate, the reducing agent, during 24 hours is efficient to transform the birnessite powder in a hausmanite Mn{sub 3}O{sub 4} powder. Well crystallised square shape nanoparticles are obtained. Different birnessite precursors have been tested and the reaction kinetics is strongly correlated to the crystallinity and granulometry of the precursor. The effects of aging time and hydrazine hydrate amount have been studied. Well crystallised Mn{sub 3}O{sub 4} is obtained in one hour. The presence of feitknechtite (MnO(OH)) and amorphous nanorods has been detected as an intermediate phase during birnessite conversion into hausmanite. The conversion mechanism is discussed. - Graphical abstract: TEM image showing Mn{sub 3}O{sub 4} particle after treatment of birnessite with an addition of hydrazine during 24 hours.

  11. Permeability and kinetic coefficients for mesoscale BCF surface step dynamics: Discrete two-dimensional deposition-diffusion equation analysis

    DOE PAGES [OSTI]

    Zhao, Renjie; Evans, James W.; Oliveira, Tiago J.

    2016-04-08

    Here, a discrete version of deposition-diffusion equations appropriate for description of step flow on a vicinal surface is analyzed for a two-dimensional grid of adsorption sites representing the stepped surface and explicitly incorporating kinks along the step edges. Model energetics and kinetics appropriately account for binding of adatoms at steps and kinks, distinct terrace and edge diffusion rates, and possible additional barriers for attachment to steps. Analysis of adatom attachment fluxes as well as limiting values of adatom densities at step edges for nonuniform deposition scenarios allows determination of both permeability and kinetic coefficients. Behavior of these quantities is assessedmore » as a function of key system parameters including kink density, step attachment barriers, and the step edge diffusion rate.« less

  12. Saving Energy and Money with Wind: 5 Steps Before You Invest in a New Wind Energy System

    Office of Energy Efficiency and Renewable Energy (EERE)

    Make sure you understand these 5 important steps before investing in a wind energy system for your home.

  13. Using corresponding state theory to obtain intermolecular potentials to calculate pure liquid shock Hugoniots

    SciTech Connect

    Hobbs, M.L.

    1997-12-01

    Determination of product species, equations-of-state (EOS) and thermochemical properties of high explosives and pyrotechnics remains a major unsolved problem. Although, empirical EOS models may be calibrated to replicate detonation conditions within experimental variability (5--10%), different states, e.g. expansion, may produce significant discrepancy with data if the basic form of the EOS model is incorrect. A more physically realistic EOS model based on intermolecular potentials, such as the Jacobs Cowperthwaite Zwisler (JCZ3) EOS, is needed to predict detonation states as well as expanded states. Predictive capability for any EOS requires a large species data base composed of a wide variety of elements. Unfortunately, only 20 species have known JCZ3 molecular force constants. Of these 20 species, only 10 have been adequately compared to experimental data such as molecular scattering or shock Hugoniot data. Since data in the strongly repulsive region of the molecular potential is limited, alternative methods must be found to deduce force constants for a larger number of species. The objective of the present study is to determine JCZ3 product species force constants by using a corresponding states theory. Intermolecular potential parameters were obtained for a variety of gas species using a simple corresponding states technique with critical volume and critical temperature. A more complex, four parameter corresponding state method with shape and polarity corrections was also used to obtain intermolecular potential parameters. Both corresponding state methods were used to predict shock Hugoniot data obtained from pure liquids. The simple corresponding state method is shown to give adequate agreement with shock Hugoniot data.

  14. Results of the 2013 UT modeling benchmark obtained with models implemented in CIVA

    SciTech Connect

    Toullelan, Gwnal; Raillon, Raphale; Chatillon, Sylvain; Lonne, Sbastien

    2014-02-18

    The 2013 Ultrasonic Testing (UT) modeling benchmark concerns direct echoes from side drilled holes (SDH), flat bottom holes (FBH) and corner echoes from backwall breaking artificial notches inspected with a matrix phased array probe. This communication presents the results obtained with the models implemented in the CIVA software: the pencilmodel is used to compute the field radiated by the probe, the Kirchhoff approximation is applied to predict the response of FBH and notches and the SOV (Separation Of Variables) model is used for the SDH responses. The comparison between simulated and experimental results are presented and discussed.

  15. Digital Processing of Medical Images Obtained by a Si Microstrips Detector

    SciTech Connect

    Diaz, Claudia C.; Montano, Luis M.; Fontaine, Marcos; Leyva, Antonio

    2006-09-08

    We studied the capability of Matlab in digital processing of breast tissues images with microcalcifications. We obtained digital images of different byopsies through a Bede X-ray tube, fixed at 20 kV and 1 mA. Radiation exposition time was varied. The byopsies were placed between a 120{mu}m collimator and a 128 strips detector, which was used to measure the absorption of X rays in the tissue. Matlab allowed the manipulation of digital images, and this software was intended to improve the identification of microcalcifications in breast tissues.

  16. SPECKLE INTERFEROMETRY AT MOUNT WILSON OBSERVATORY: OBSERVATIONS OBTAINED IN 2006-2007 AND 35 NEW ORBITS

    SciTech Connect

    Hartkopf, William I.; Mason, Brian D. E-mail: bdm@usno.navy.mil

    2009-09-15

    Results are presented for 607 speckle interferometric observations of double stars, as well as 222 measures of single stars or unresolved pairs. All data were obtained in 2006 and 2007 at the Mount Wilson Observatory, using the 2.5 m Hooker telescope. Separations range from 0.''06 to 6.''31, with a median of 0.''34. These three observing runs concentrated on binaries in need of confirmation (mainly Hipparcos and Tycho pairs), as well as systems in need of improved orbital elements. New orbital solutions have been determined for 35 systems as a result.

  17. Enhanced performance of wearable piezoelectric nanogenerator fabricated by two-step hydrothermal process

    SciTech Connect

    Qiu, Yu; Lei, Jixue; Yin, Bing; Zhang, Heqiu; Ji, Jiuyu; Hu, Lizhong; Bian, Jiming; Liu, Yanhong; Zhao, Yu; Luo, Yingmin

    2014-03-17

    A simple two-step hydrothermal process was proposed for enhancing the performance of the nanogenerator on flexible and wearable terylene-fabric substrate. With this method, a significant enhancement in output voltage of the nanogenerator from ∼10 mV to 7 V was achieved, comparing with the one by conventional one-step process. In addition, another advantage with the devices synthesized by two-step hydrothermal process was that their output voltages are only sensitive to strain rather than strain rate. The devices with a high output voltage have the ability to power common electric devices and will have important applications in flexible electronics and wearable devices.

  18. Design and optimization of a harmonic probe with step cross section in multifrequency atomic force microscopy

    SciTech Connect

    Cai, Jiandong; Zhang, Li; Wang, Michael Yu

    2015-12-15

    In multifrequency atomic force microscopy (AFM), probe’s characteristic of assigning resonance frequencies to integer harmonics results in a remarkable improvement of detection sensitivity at specific harmonic components. The selection criterion of harmonic order is based on its amplitude’s sensitivity on material properties, e.g., elasticity. Previous studies on designing harmonic probe are unable to provide a large design capability along with maintaining the structural integrity. Herein, we propose a harmonic probe with step cross section, in which it has variable width in top and bottom steps, while the middle step in cross section is kept constant. Higher order resonance frequencies are tailored to be integer times of fundamental resonance frequency. The probe design is implemented within a structural optimization framework. The optimally designed probe is micromachined using focused ion beam milling technique, and then measured with an AFM. The measurement results agree well with our resonance frequency assignment requirement.

  19. Use of aluminum phosphate as the dehydration catalyst in single step dimethyl ether process

    DOEpatents

    Peng, Xiang-Dong; Parris, Gene E.; Toseland, Bernard A.; Battavio, Paula J.

    1998-01-01

    The present invention pertains to a process for the coproduction of methanol and dimethyl ether (DME) directly from a synthesis gas in a single step (hereafter, the "single step DME process"). In this process, the synthesis gas comprising hydrogen and carbon oxides is contacted with a dual catalyst system comprising a physical mixture of a methanol synthesis catalyst and a methanol dehydration catalyst. The present invention is an improvement to this process for providing an active and stable catalyst system. The improvement comprises the use of an aluminum phosphate based catalyst as the methanol dehydration catalyst. Due to its moderate acidity, such a catalyst avoids the coke formation and catalyst interaction problems associated with the conventional dual catalyst systems taught for the single step DME process.

  20. Exponential time-differencing with embedded Runge–Kutta adaptive step control

    SciTech Connect

    Whalen, P.; Brio, M.; Moloney, J.V.

    2015-01-01

    We have presented the first embedded Runge–Kutta exponential time-differencing (RKETD) methods of fourth order with third order embedding and fifth order with third order embedding for non-Rosenbrock type nonlinear systems. A procedure for constructing RKETD methods that accounts for both order conditions and stability is outlined. In our stability analysis, the fast time scale is represented by a full linear operator in contrast to particular scalar cases considered before. An effective time-stepping strategy based on reducing both ETD function evaluations and rejected steps is described. Comparisons of performance with adaptive-stepping integrating factor (IF) are carried out on a set of canonical partial differential equations: the shock-fronts of Burgers equation, interacting KdV solitons, KS controlled chaos, and critical collapse of two-dimensional NLS.

  1. Enabling fast, stable and accurate peridynamic computations using multi-time-step integration

    DOE PAGES [OSTI]

    Lindsay, P.; Parks, M. L.; Prakash, A.

    2016-04-13

    Peridynamics is a nonlocal extension of classical continuum mechanics that is well-suited for solving problems with discontinuities such as cracks. This paper extends the peridynamic formulation to decompose a problem domain into a number of smaller overlapping subdomains and to enable the use of different time steps in different subdomains. This approach allows regions of interest to be isolated and solved at a small time step for increased accuracy while the rest of the problem domain can be solved at a larger time step for greater computational efficiency. Lastly, performance of the proposed method in terms of stability, accuracy, andmore » computational cost is examined and several numerical examples are presented to corroborate the findings.« less

  2. InGaAs/GaAs (110) quantum dot formation via step meandering

    SciTech Connect

    Diez-Merino, Laura; Tejedor, Paloma

    2011-07-01

    InGaAs (110) semiconductor quantum dots (QDs) offer very promising prospects as a material base for a new generation of high-speed spintronic devices, such as single electron transistors for quantum computing. However, the spontaneous formation of InGaAs QDs is prevented by two-dimensional (2D) layer-by-layer growth on singular GaAs (110) substrates. In this work we have studied, by using atomic force microscopy and photoluminescence spectroscopy (PL), the growth of InGaAs/GaAs QDs on GaAs (110) stepped substrates by molecular beam epitaxy (MBE), and the modification of the adatom incorporation kinetics to surface steps in the presence of chemisorbed atomic hydrogen. The as-grown QDs exhibit lateral dimensions below 100 nm and emission peaks in the 1.35-1.37 eV range. It has been found that a step meandering instability derived from the preferential attachment of In adatoms to [110]-step edges relative to [11n]-type steps plays a key role in the destabilization of 2D growth that leads to 3D mound formation on both conventional and H-terminated vicinal substrates. In the latter case, the driving force for 3D growth via step meandering is enhanced by H-induced upward mass transport in addition to the lower energy cost associated with island formation on H-terminated substrates, which results in a high density array of InGaAs/GaAs dots selectively nucleated on the terrace apices with reduced lateral dimensions and improved PL efficiency relative to those of conventional MBE-grown samples.

  3. Obtaining accurate amounts of mercury from mercury compounds via electrolytic methods

    DOEpatents

    Grossman, Mark W.; George, William A.

    1987-01-01

    A process for obtaining pre-determined, accurate rate amounts of mercury. In one embodiment, predetermined, precise amounts of Hg are separated from HgO and plated onto a cathode wire. The method for doing this involves dissolving a precise amount of HgO which corresponds to a pre-determined amount of Hg desired in an electrolyte solution comprised of glacial acetic acid and H.sub.2 O. The mercuric ions are then electrolytically reduced and plated onto a cathode producing the required pre-determined quantity of Hg. In another embodiment, pre-determined, precise amounts of Hg are obtained from Hg.sub.2 Cl.sub.2. The method for doing this involves dissolving a precise amount of Hg.sub.2 Cl.sub.2 in an electrolyte solution comprised of concentrated HCl and H.sub.2 O. The mercurous ions in solution are then electrolytically reduced and plated onto a cathode wire producing the required, pre-determined quantity of Hg.

  4. Heat-Rate Improvement Obtained by Retubing Power-Plant Condenser Enhanced Tubes

    Energy Science and Technology Software Center

    1994-01-21

    A utility will only retube a condenser with enhanced tubes if the incremental cost of the enhanced tubes can be offset with reduced fuel costs. The reduced fuel cost is obtained for some units because of the higher heat-transfer coefficient of enhanced tubes. They lead to improved condenser performance measured by a lower condenser pressure and therefore a more efficient power plant. However, the higher haet-transfer coefficients do not always guarantee that enhanced tubes willmore » be more cost effective. Other issues must be considered such as the cooling-water flow reduction due to the increased pressure drop, the low-pressure turbine heat-rate variation with backpressure, and the cooling-water pump and system characteristics. These and other parameters must be considered to calculate the efficiency improvement of the power plant as commonly measured by the quantity known as the heat rate. Knowing the heat-rate improvement, the fuel cost, and the incremental increase of the enhanced tubes from the supplier, the payback time can be determined. This program calculates the heat-rate improvement that can be obtained by retubing a power plant condenser with enhanced tubes of a particular type called Korodense LPD made by Wolverine Tube, Inc. The fuel savings are easily established knowing the heat-rate improvement. All electrical utilities are potential users because a condenser is used as the heat sink for every power plant.« less

  5. Transient electron heat diffusivity obtained from trace impurity injection on TFTR

    SciTech Connect

    Kissick, M. W.; Fredrickson, E. D.; Callen, J. D.; Bush, C. E.; Chang, Z. Y.; Efthimion, P. C.; Hulse, R. A.; Mansfield, D. K.; Park, H. K.; Schivell, J.; Scott, S. D.; Synakowski, E. J.; Taylor, G.; Zarnstorff, M. C.

    1993-08-01

    A new method for obtaining a transient (``pulse``) electron heat diffusivity (?ep) in the radial region 0.38 < r/a < 0.56 in TFTR L-mode discharges is presented. Small electron temperature perturbations were caused by single bursts of injected impurities which radiated and cooled the plasma edge. An iron injection case by laser ablation was found to be more definitive than a supporting helium gas puff case. In this new ``cold pulse`` method, we concentrate on modeling just the electron temperature perturbations, tracked with ECE (electron cyclotron emission) diagnostics and on being able to justify separation in space and time from the cooling source. This ?ep is obtained for these two cases to be ?ep = (6.0m/s 35%) ~ 4?e(power balance) which is consistent with, but more definitive than, results from other studies that are more susceptible to ambiguities in the source profile.

  6. Obtaining accurate amounts of mercury from mercury compounds via electrolytic methods

    DOEpatents

    Grossman, M.W.; George, W.A.

    1987-07-07

    A process is described for obtaining pre-determined, accurate rate amounts of mercury. In one embodiment, predetermined, precise amounts of Hg are separated from HgO and plated onto a cathode wire. The method for doing this involves dissolving a precise amount of HgO which corresponds to a pre-determined amount of Hg desired in an electrolyte solution comprised of glacial acetic acid and H[sub 2]O. The mercuric ions are then electrolytically reduced and plated onto a cathode producing the required pre-determined quantity of Hg. In another embodiment, pre-determined, precise amounts of Hg are obtained from Hg[sub 2]Cl[sub 2]. The method for doing this involves dissolving a precise amount of Hg[sub 2]Cl[sub 2] in an electrolyte solution comprised of concentrated HCl and H[sub 2]O. The mercurous ions in solution are then electrolytically reduced and plated onto a cathode wire producing the required, pre-determined quantity of Hg. 1 fig.

  7. Soboba Band of Luiseño Indians Celebrates Initial Step Toward Achieving

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Its Tribal Energy Vision | Department of Energy Soboba Band of Luiseño Indians Celebrates Initial Step Toward Achieving Its Tribal Energy Vision Soboba Band of Luiseño Indians Celebrates Initial Step Toward Achieving Its Tribal Energy Vision July 27, 2016 - 2:16pm Addthis On July 25, Office of Indian Energy Director Chris Deschene joined Soboba Tribal Council Vice-Chair Isaiah Vivanco, other members of the tribal council and staff, and partners from Southern California Edison and Optimum

  8. How to Make a Battery in 7 Steps | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Make a Battery in 7 Steps How to Make a Battery in 7 Steps May 24, 2016 - 11:30am Addthis See how batteries are assembled at PNNL's Advanced Battery Facility. | Video by PNNL. Franny White Pacific Northwest National Laboratory From smartphones to electric cars and even the Tesla Powerwall, rechargeable batteries power our modern lives. But have you ever stopped to wonder what's inside these devices that allow us to send emojis, drive around town and so much more? If so, check out the Advanced

  9. 5 Steps to Making Your Windows More Energy Efficient | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Steps to Making Your Windows More Energy Efficient 5 Steps to Making Your Windows More Energy Efficient December 13, 2013 - 4:06pm Addthis Keep your hard-earned dollars from flying out the window by following the <a href="http://apps1.eere.energy.gov/buildings/publications/pdfs/building_america/measure_guide_wood_windows.pdf">latest guidelines for window repair, rehabilitation and replacement</a>. | Photo courtesy of the Weatherization Assistance Program Technical

  10. Maximizing Efficiency in Two-step Solar-thermochemical Fuel Production

    SciTech Connect

    Ermanoski, I.

    2015-05-01

    Widespread solar fuel production depends on its economic viability, largely driven by the solar-to-fuel conversion efficiency. Herein, the material and energy requirements in two-step solar-thermochemical cyclesare considered.The need for advanced redox active materials is demonstrated, by considering the oxide mass flow requirements at a large scale. Two approaches are also identified for maximizing the efficiency: optimizing reaction temperatures, and minimizing the pressure in the thermal reduction step by staged thermal reduction. The results show that each approach individually, and especially the two in conjunction, result in significant efficiency gains.

  11. 2014 Rube Goldberg mission: Zip a zipper in 20 steps | Argonne National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Laboratory 2014 Rube Goldberg mission: Zip a zipper in 20 steps By Justin H.S. Breaux * February 18, 2014 Tweet EmailPrint CHICAGO, Ill. - A team from Reavis High School in Burbank, Ill., won one for the zipper at Argonne National Laboratory's 19th annual Rube Goldberg Machine Contest, held today at Chicago's Children Museum at Navy Pier. Reavis High defeated nine other teams by building a complex machine that takes at least 20 steps to zip a zipper. By winning Argonne's contest, the Reavis

  12. Transparent TiO2 nanotube array photoelectrodes prepared via two-step anodization

    DOE PAGES [OSTI]

    Kim, Jin Young; Zhu, Kai; Neale, Nathan R.; Frank, Arthur J.

    2014-04-04

    Two-step anodization of transparent TiO2 nanotube arrays has been demonstrated with aid of a Nb-doped TiO2 buffer layer deposited between the Ti layer and TCO substrate. Enhanced physical adhesion and electrochemical stability provided by the buffer layer has been found to be important for successful implementation of the two-step anodization process. As a result, with the proposed approach, the morphology and thickness of NT arrays could be controlled very precisely, which in turn, influenced their optical and photoelectrochemical properties.

  13. Department of Energy to Take Steps to Remove ENERGY STAR Label on Certain

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    LG Refrigerator-Freezer Models | Department of Energy to Take Steps to Remove ENERGY STAR Label on Certain LG Refrigerator-Freezer Models Department of Energy to Take Steps to Remove ENERGY STAR Label on Certain LG Refrigerator-Freezer Models December 7, 2009 - 12:00am Addthis Washington, DC - The Department of Energy announced today that as part of the expanded enforcement efforts under the ENERGY STAR® program, effective January 2, 2010, certain LG French-door refrigerator-freezers are

  14. Microsoft Word - Results_of_the_Independent_Hanford_Traffic_Safety_Study_and_Next_Steps_ANNOUNCEMENT.docx

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ANNOUNCEMENT Department of Energy RL No.: 10-0124 Richland Operations Office P.O. Box 550 Richland, Washington 99352 Issued: 6/11/2010 To: ALL HANFORD EMPLOYEES Subject: RESULTS OF INDEPENDENT HANFORD TRAFFIC SAFETY STUDY AND NEXT STEPS One of the most hazardous situations that most of us face each day is driving to and from work. Therefore, we are taking some immediate steps to improve safety on the site's roads. In response to an increase in traffic safety concerns the Richland Operations

  15. New Accelerator Will Study Steps on the Path to Fusion Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Accelerator Will Study Steps on the Path to Fusion Power New Accelerator Will Study Steps on the Path to Fusion Power Unusual Machine Tailor-made to Examine Heavy-ion Fusion May 10, 2012 The accelerator, looking "downstream." In the foreground is the grounded cage th The accelerator, looking "downstream." In the foreground is the grounded cage that encloses the 150,000-volt injector. See more photos at http://newscenter.lbl.gov/news-releases/2012/05/08/ndcx-accelerator/

  16. U.S. Deputy Energy Secretary Poneman Announces New Steps to Support Clean

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Small Businesses | Department of Energy Deputy Energy Secretary Poneman Announces New Steps to Support Clean Energy Small Businesses U.S. Deputy Energy Secretary Poneman Announces New Steps to Support Clean Energy Small Businesses May 23, 2012 - 11:27am Addthis NEWS MEDIA CONTACT (202) 586-4940 FAYETTEVILLE, AR - As part of National Small Business Week and to highlight President Obama's focus on small businesses as leaders in an economy built to last, U.S. Deputy Secretary of Energy

  17. U.S. and New Zealand Take Steps to Launch International Partnership to

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Further the Development of Clean Energy on Island Nations | Department of Energy New Zealand Take Steps to Launch International Partnership to Further the Development of Clean Energy on Island Nations U.S. and New Zealand Take Steps to Launch International Partnership to Further the Development of Clean Energy on Island Nations July 24, 2008 - 2:14pm Addthis U.S. to Work with New Zealand to Encourage Utilization of Natural Renewable Energy Resources NASSAU, BAHAMAS - The U.S. Department of

  18. Fatigue life improvement factors obtained by weld reinforcement and toe grinding

    SciTech Connect

    Mullen, C.L.; Merwin, J.E.

    1982-01-01

    The potential of weld reinforcement and toe grinding techniques for improving the fatigue life of welded joints protected from seawater corrosion is quantified based on tests performed in air on welded plate specimens. Results are presented in terms of median fatigue life improvement factors and prediction intervals obtained by linear regression analysis. The significant improvements possible with weld reinforcement are shown to be caused partly by a slight alleviation of the stress concentration imposed by sharp angles at the weld toe. Variable improvements observed for toe ground welds are shown to be associated with the variable surface modifications which different tools impose on weld toes. Load and weld geometry are shown to be particulary important when bending stresses are applied to the weld toe, since reinforcement affects the bending moment at the toe section and toe grinding affects the conditions at the highly stressed outer fibers. 14 references.

  19. Process and apparatus for obtaining samples of liquid and gas from soil

    DOEpatents

    Rossabi, J.; May, C.P.; Pemberton, B.E.; Shinn, J.; Sprague, K.

    1999-03-30

    An apparatus and process for obtaining samples of liquid and gas from subsurface soil is provided having filter zone adjacent an external expander ring. The expander ring creates a void within the soil substrate which encourages the accumulation of soil-borne fluids. The fluids migrate along a pressure gradient through a plurality of filters before entering a first chamber. A one-way valve regulates the flow of fluid into a second chamber in further communication with a collection tube through which samples are collected at the surface. A second one-way valve having a reverse flow provides additional communication between the chambers for the pressurized cleaning and back-flushing of the apparatus. 8 figs.

  20. Process and apparatus for obtaining samples of liquid and gas from soil

    DOEpatents

    Rossabi, Joseph; May, Christopher P.; Pemberton, Bradley E.; Shinn, Jim; Sprague, Keith

    1999-01-01

    An apparatus and process for obtaining samples of liquid and gas from subsurface soil is provided having filter zone adjacent an external expander ring. The expander ring creates a void within the soil substrate which encourages the accumulation of soil-borne fluids. The fluids migrate along a pressure gradient through a plurality of filters before entering a first chamber. A one-way valve regulates the flow of fluid into a second chamber in further communication with a collection tube through which samples are collected at the surface. A second one-way valve having a reverse flow provides additional communication between the chambers for the pressurized cleaning and back-flushing of the apparatus.

  1. Composition and microstructure of zirconium and hafnium germanates obtained by different chemical routes

    SciTech Connect

    Utkin, A.V. Prokip, V.E.; Baklanova, N.I.

    2014-01-15

    The phase composition and morphology of zirconium and hafnium germanates synthesized by ceramic and co-precipitation routes were studied. The products were characterized using high-temperature X-ray diffraction analysis (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and thermal (TG/DTA) analysis. To investigate the phase composition and stoichiometry of compounds the unit cell parameters were refined by full-profile Rietveld XRD analysis. The morphology of products and its evolution during high-temperature treatment was examined by SEM analysis. It was stated that there is the strong dependence of the phase composition and morphology of products on the preparation route. The ceramic route requires a multi-stage high-temperature treatment to obtain zirconium and hafnium germanates of 95% purity or more. Also, there are strong diffusion limitations to obtain hafnium germanate Hf{sub 3}GeO{sub 8} by ceramic route. On the contrary, the co-precipitation route leads to the formation of nanocrystalline single phase germanates of stoichiometric composition at a relatively low temperatures (less than 1000 C). The results of quantitative XRD analysis showed the hafnium germanates are stoichiometric compounds in contrast to zirconium germanates that form a set of solid solutions. This distinction may be related to the difference in the ion radii of Zr and Hf. - Graphical abstract: The phase composition and morphology of zirconium and hafnium germanates synthesized by ceramic and co-precipitation routes were studied. It was stated that there is the strong dependence of the phase composition and morphology of products on the preparation route. Display Omitted - Highlights: Zr and Hf germanates were synthesized by ceramic and co-precipitation routes. The morphology of products depends on the synthesis parameters. Zirconium germanates forms a set of solid solutions. Hafnium germanates are stoichiometric compounds.

  2. Analysis of the Quality of Information Obtained About Uterine Artery Embolization From the Internet

    SciTech Connect

    Tavare, Aniket N.; Alsafi, Ali Hamady, Mohamad S.

    2012-12-15

    Purpose: The Internet is widely used by patients to source health care-related information. We sought to analyse the quality of information available on the Internet about uterine artery embolization (UAE). Materials and Methods: We searched three major search engines for the phrase 'uterine artery embolization' and compiled the top 50 results from each engine. After excluding repeated sites, scientific articles, and links to documents, the remaining 50 sites were assessed using the LIDA instrument, which scores sites across the domains of accessibility, usability, and reliability. The Fleisch reading ease score (FRES) was calculated for each of the sites. Finally, we checked the country of origin and the presence of certification by the Health On the Net Foundation (HONcode) as well as their effect on LIDA and FRES scores.ResultsThe following mean scores were obtained: accessibility 48/60 (80%), usability 42/54 (77%), reliability 20/51 (39%), total LIDA 110/165 (67%), and FRES 42/100 (42%). Nine sites had HONcode certification, and this was associated with significantly greater (p < 0.05) reliability and total LIDA and FRES scores. When comparing sites between United Kingdom and United States, there was marked variation in the quality of results obtained when searching for information on UAE (p < 0.05). Conclusion: In general, sites were well designed and easy to use. However, many scored poorly on the reliability of their information either because they were produced in a non-evidence-based way or because they lacking currency. It is important that patients are guided to reputable, location-specific sources of information online, especially because prominent search engine rank does not guarantee reliability of information.

  3. FEMP: Seven steps to saving: How to implement energy-saving projects

    SciTech Connect

    Pitchford, P.

    1999-05-26

    The Energy Policy Act of 1992 and supporting Executive Orders have directed Federal agencies to implement cost-effective energy and water efficient measures to help conserve natural resources and protect the environment. Federal energy and facility managers can make a big difference. DOE's Federal Energy Management Program (FEMP) has outlined seven steps on how to implement an energy-saving project.

  4. Institutional Change Process Step 2: Assess Institutional Rules, Roles, and Tools

    Office of Energy Efficiency and Renewable Energy (EERE)

    After determining your institutional change sustainability goals, the next step is to analyze the context within which these goals are to be achieved. Start by identifying the organizational rules, roles, and tools that shape the current context and may influence success in achieving these goals. Identifying the linkages among rules, roles, and tools and how they interact will help in implementing solutions for success.

  5. High temperature superconductor step-edge Josephson junctions using Ti-Ca-Ba-Cu-O

    DOEpatents

    Ginley, David S.; Hietala, Vincent M.; Hohenwarter, Gert K. G.; Martens, Jon S.; Plut, Thomas A.; Tigges, Chris P.; Vawter, Gregory A.; Zipperian, Thomas E.

    1994-10-25

    A process for formulating non-hysteretic and hysteretic Josephson junctions using HTS materials which results in junctions having the ability to operate at high temperatures while maintaining high uniformity and quality. The non-hysteretic Josephson junction is formed by step-etching a LaAlO.sub.3 crystal substrate and then depositing a thin film of TlCaBaCuO on the substrate, covering the step, and forming a grain boundary at the step and a subsequent Josephson junction. Once the non-hysteretic junction is formed the next step to form the hysteretic Josephson junction is to add capacitance to the system. In the current embodiment, this is accomplished by adding a thin dielectric layer, LaA1O.sub.3, followed by a cap layer of a normal metal where the cap layer is formed by first depositing a thin layer of titanium (Ti) followed by a layer of gold (Au). The dielectric layer and the normal metal cap are patterned to the desired geometry.

  6. One step process for producing dense aluminum nitride and composites thereof

    DOEpatents

    Holt, J. Birch; Kingman, Donald D.; Bianchini, Gregory M.

    1989-01-01

    A one step combustion process for the synthesis of dense aluminum nitride compositions is disclosed. The process comprises igniting pure aluminum powder in a nitrogen atmosphere at a pressure of about 1000 atmospheres or higher. The process enables the production of aluminum nitride bodies to be formed directly in a mold of any desired shape.

  7. One step process for producing dense aluminum nitride and composites thereof

    DOEpatents

    Holt, J.B.; Kingman, D.D.; Bianchini, G.M.

    1989-10-31

    A one step combustion process for the synthesis of dense aluminum nitride compositions is disclosed. The process comprises igniting pure aluminum powder in a nitrogen atmosphere at a pressure of about 1,000 atmospheres or higher. The process enables the production of aluminum nitride bodies to be formed directly in a mold of any desired shape.

  8. Magnetization-steps in Y?CoMnO? double perovskite: The role of antisite disorder

    SciTech Connect

    Nair, Harikrishnan S. Xiao, Yinguo; Brckel, Th.; Cherian, Dona; Elizabeth, Suja; Hansen, Thomas; Chatterji, Tapan

    2014-09-28

    Antisite disorder is observed to have significant impact on the magnetic properties of the double perovskite YCoMnO? which has been recently identified as a multiferroic. A paramagnetic-ferromagnetic phase transition occurs in this material at Tc ? 75 K. At 2 K, it displays a strong ferromagnetic hysteresis with a significant coercive field of Hc ? 15 kOe. Sharp steps are observed in the hysteresis curves recorded below 8 K. In the temperature range 2 K ? T ? 5 K, the hysteresis loops are anomalous as the virgin curve lies outside the main loop. The field-cooling conditions as well as the rate of field-sweep are found to influence the steps. Quantitative analysis of the neutron diffraction data shows that at room temperature, Y?CoMnO? consists of 62% of monoclinic P2?/n with nearly 70% antisite disorder and 38% Pnma. The bond valence sums indicate the presence of other valence states for Co and Mn which arise from disorder. We explain the origin of steps by using a model for pinning of magnetization at the antiphase boundaries created by antisite disorder. The steps in magnetization closely resemble the martensitic transformations found in intermetallics and display first-order characteristics as revealed in the Arrott's plots.

  9. Smart Grid Outreach and Communication Strategy: Next Steps - EAC Recommendations for DOE (October 17, 2012)

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Smart Grid Outreach and Communication Strategy: The Next Steps Recommendations for the U.S. Department of Energy A Report by The Electricity Advisory Committee October 2012 Table of Contents EAC Smart Grid Outreach White Paper 1 Glossary of Terms and Abbreviations .................................................................................................. 3 2 Executive Summary: EAC Smart Grid Recommendations to DOE ..................................................... 4 3 What are the

  10. Informational Webinar: First Steps Toward Developing Renewable Energy and Energy Efficiency on Tribal Lands (FOA-0001621)

    Energy.gov [DOE]

    The U.S. Department of Energy Office of Indian Energy is hosting an informational webinar on the funding opportunity, First Steps Toward Developing Renewable Energy and Energy Efficiency on Tribal Lands (FOA-0001621). The webinar will cover eligibility, application, and cost share requirements; selection process; and more.

  11. A Two-Step Approach to Uncertainty Quantification of Core Simulators

    SciTech Connect

    Yankov, Artem; Collins, Benjamin; Klein, Markus; Jessee, Matthew A.; Zwermann, Winfried; Velkov, Kiril; Pautz, Andreas; Downar, Thomas

    2012-01-01

    For the multiple sources of error introduced into the standard computational regime for simulating reactor cores, rigorous uncertainty analysis methods are available primarily to quantify the effects of cross section uncertainties. Two methods for propagating cross section uncertainties through core simulators are the XSUSA statistical approach and the “two-step” method. The XSUSA approach, which is based on the SUSA code package, is fundamentally a stochastic sampling method. Alternatively, the two-step method utilizes generalized perturbation theory in the first step and stochastic sampling in the second step. The consistency of these two methods in quantifying uncertainties in the multiplication factor and in the core power distribution was examined in the framework of phase I-3 of the OECD Uncertainty Analysis in Modeling benchmark. With the Three Mile Island Unit 1 core as a base model for analysis, the XSUSA and two-step methods were applied with certain limitations, and the results were compared to those produced by other stochastic sampling-based codes. Based on the uncertainty analysis results, conclusions were drawn as to the method that is currently more viable for computing uncertainties in burnup and transient calculations.

  12. A Two-Step Approach to Uncertainty Quantification of Core Simulators

    DOE PAGES [OSTI]

    Yankov, Artem; Collins, Benjamin; Klein, Markus; Jessee, Matthew A.; Zwermann, Winfried; Velkov, Kiril; Pautz, Andreas; Downar, Thomas

    2012-01-01

    For the multiple sources of error introduced into the standard computational regime for simulating reactor cores, rigorous uncertainty analysis methods are available primarily to quantify the effects of cross section uncertainties. Two methods for propagating cross section uncertainties through core simulators are the XSUSA statistical approach and the “two-step” method. The XSUSA approach, which is based on the SUSA code package, is fundamentally a stochastic sampling method. Alternatively, the two-step method utilizes generalized perturbation theory in the first step and stochastic sampling in the second step. The consistency of these two methods in quantifying uncertainties in the multiplication factor andmore » in the core power distribution was examined in the framework of phase I-3 of the OECD Uncertainty Analysis in Modeling benchmark. With the Three Mile Island Unit 1 core as a base model for analysis, the XSUSA and two-step methods were applied with certain limitations, and the results were compared to those produced by other stochastic sampling-based codes. Based on the uncertainty analysis results, conclusions were drawn as to the method that is currently more viable for computing uncertainties in burnup and transient calculations.« less

  13. Single step signal group-imidazole labeling of organic phosphate groups under aqueous conditions

    DOEpatents

    Giese, R.W.; Wang, P.

    1996-04-30

    Compounds and methods for single step, covalent labeling of the phosphate group of an organic substance under aqueous conditions are described. The labeling compound includes any kind of detectable signal group covalently bound to an imidazole moiety, which can be imidazole or a substituted imidazole. A preferred labeling compound has the formula shown in the accompanying diagram. 4 figs.

  14. High temperature superconductor step-edge Josephson junctions using Ti-Ca-Ba-Cu-O

    DOEpatents

    Ginley, D.S.; Hietala, V.M.; Hohenwarter, G.K.G.; Martens, J.S.; Plut, T.A.; Tigges, C.P.; Vawter, G.A.; Zipperian, T.E.

    1994-10-25

    A process is disclosed for formulating non-hysteretic and hysteretic Josephson junctions using HTS materials which results in junctions having the ability to operate at high temperatures while maintaining high uniformity and quality. The non-hysteretic Josephson junction is formed by step-etching a LaAlO[sub 3] crystal substrate and then depositing a thin film of TlCaBaCuO on the substrate, covering the step, and forming a grain boundary at the step and a subsequent Josephson junction. Once the non-hysteretic junction is formed the next step to form the hysteretic Josephson junction is to add capacitance to the system. In the current embodiment, this is accomplished by adding a thin dielectric layer, LaA1O[sub 3], followed by a cap layer of a normal metal where the cap layer is formed by first depositing a thin layer of titanium (Ti) followed by a layer of gold (Au). The dielectric layer and the normal metal cap are patterned to the desired geometry. 8 figs.

  15. Single step signal group-imidazole labeling of organic phosphate groups under aqueous conditions

    DOEpatents

    Giese, Roger W.; Wang, Poguang

    1996-01-01

    Compounds and methods for single step, covalent labeling of the phosphate group of an organic substance under aqueous conditions are described. The labeling compound includes any kind of detectable signal group covalently bound to an imidazole moiety, which can be imidazole or a substituted imidazole. A preferred labeling compound has the formula ##STR1##

  16. Comparison of Different Load Road Implementation Strategies on Fuel Economy of USPS Step Vans

    Energy.gov [DOE]

    An alternative form of measuring road loads, instead of using a chassis dynamometer and a method described in 40 CFR section 86.1229-85, was conducted on on-road coastdowns, and regression analysis was used to determine the characteristics of the two U.S. Postal Service step vans, one of which was a hybrid model

  17. Exploratory Research on Novel Coal Liquefaction Concept - Task 2: Evaluation of Process Steps.

    SciTech Connect

    Brandes, S.D.; Winschel, R.A.

    1997-05-01

    A novel direct coal liquefaction technology is being investigated in a program being conducted by CONSOL Inc. with the University of Kentucky, Center for Applied Energy Research and LDP Associates under DOE Contract DE-AC22-95PC95050. The novel concept consists of a new approach to coal liquefaction chemistry which avoids some of the inherent limitations of current high-temperature thermal liquefaction processes. The chemistry employed is based on hydride ion donation to solubilize coal at temperatures (350-400{degrees}C) significantly lower than those typically used in conventional coal liquefaction. The process concept being explored consists of two reaction stages. In the first stage, the coal is solubilized by hydride ion donation. In the second, the products are catalytically upgraded to acceptable refinery feedstocks. The program explores not only the initial solubilization step, but integration of the subsequent processing steps, including an interstage solids-separation step, to produce distillate products. A unique feature of the process concept is that many of the individual reaction steps can be decoupled, because little recycle around the liquefaction system is expected. This allows for considerable latitude in the process design. Furthermore, this has allowed for each key element in the process to be explored independently in laboratory work conducted under Task 2 of the program.

  18. Morphology-controlled synthesis of Co{sub 3}O{sub 4} by one step template-free hydrothermal method

    SciTech Connect

    Zhou, Keqing; Liu, Jiajia; Wen, Panyue; Hu, Yuan Gui, Zhou

    2015-07-15

    Highlights: • Co{sub 3}O{sub 4} crystals had been synthesized by one step template-free hydrothermal method. • The H{sub 2}O{sub 2} plays a crucial role in morphological control of Co{sub 3}O{sub 4} nanostructures. • The morphology has significant effect on the optical property of Co{sub 3}O{sub 4}. - Abstract: We had developed a facile synthetic route of Co{sub 3}O{sub 4} crystals with different morphologies via one step template-free hydrothermal method. The phase and composition of the Co{sub 3}O{sub 4} were investigated by X-ray powder diffraction and Raman spectrum. The morphology and structure of the synthesized samples were characterized by scanning electron microscopy and transmission electron microscopy. The H{sub 2}O{sub 2} played a crucial role in morphological control of Co{sub 3}O{sub 4} nanostructures. It only obtained Co-based precursor in the absence of H{sub 2}O{sub 2}. On the contrary, the Co{sub 3}O{sub 4} with different morphologies including nanoparticles, nano-discs and well-defined octahedral nanostructures were synthesized in the presence of H{sub 2}O{sub 2}. In addition, the optical property of the obtained Co{sub 3}O{sub 4} samples was investigated by UV–vis spectra.

  19. Obtaining the Bidirectional Transfer Distribution Function ofIsotropically Scattering Materials Using an Integrating Sphere

    SciTech Connect

    Jonsson, Jacob C.; Branden, Henrik

    2006-10-19

    This paper demonstrates a method to determine thebidirectional transfer distribution function (BTDF) using an integratingsphere. Information about the sample's angle dependent scattering isobtained by making transmittance measurements with the sample atdifferent distances from the integrating sphere. Knowledge about theilluminated area of the sample and the geometry of the sphere port incombination with the measured data combines to an system of equationsthat includes the angle dependent transmittance. The resulting system ofequations is an ill-posed problem which rarely gives a physical solution.A solvable system is obtained by using Tikhonov regularization on theill-posed problem. The solution to this system can then be used to obtainthe BTDF. Four bulk-scattering samples were characterised using both twogoniophotometers and the described method to verify the validity of thenew method. The agreement shown is great for the more diffuse samples.The solution to the low-scattering samples contains unphysicaloscillations, butstill gives the correct shape of the solution. Theorigin of the oscillations and why they are more prominent inlow-scattering samples are discussed.

  20. Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide

    SciTech Connect

    Bučevac, Dušan; Dapčević, Aleksandra; Maksimović, Vesna

    2014-02-01

    Highlights: • Waste MoSi{sub 2} heating elements were used as starting material for fabrication of porous acicular mullite. • Calcined MoSi{sub 2} powder was source of SiO{sub 2} and pore former at the same time. • Porous acicular mullite is promising material for filtration of diesel engine exhaust. • Samples with decent mechanical integrity and porosity of more than 60% were fabricated. - Abstract: Porous acicular mullite was fabricated by using waste MoSi{sub 2} heating element and Al{sub 2}O{sub 3}. Careful calcination of the pulverized heating element led to the formation of a mixture of MoO{sub 3} and amorphous SiO{sub 2}. This mixture was employed as both SiO{sub 2} precursor and pore former. The oxidation of MoSi{sub 2} and mullite formation were studied. The effect of fabrication temperature on phase composition, porosity, grain morphology, and compressive strength of sintered mullite was examined. Pure mullite with porosity of more than 60% and compressive strength of ∼20 MPa was obtained at temperature as low as 1300 °C. The microstructure consisted of elongated, rectangular, prism-like grains which are known to be effective in filtration of diesel engine exhaust. The increase in sintering temperature caused the change of grain morphology and reduction in compressive strength.

  1. Experimental developments to obtain real-time x-ray diffraction measurements in plate impact experiments

    SciTech Connect

    Gupta, Y.M.; Zimmerman, K.A.; Rigg, P.A.; Zaretsky, E.B.; Savage, D.M.; Bellamy, P.M.

    1999-10-01

    An experimental facility was developed to obtain real-time, quantitative, x-ray diffraction data in laboratory plate impact experiments. A powder gun, to generate plane wave loading in samples, was designed and built specifically to permit flash x-ray diffraction measurements in shock-compression experiments. Spatial resolution and quality of the diffracted signals were improved significantly over past attempts through partial collimation of the incident beam and the use of two-dimensional detectors to record data from shocked crystals. The experimental configuration and synchronization issues are discussed, and relevant details of the x-ray system and the powder gun are described. Representative results are presented from experiments designed to determine unit cell compression in shock-compressed LiF single crystals subjected to both elastic and elastic-plastic deformation, respectively. The developments described here are expected to be useful for examining lattice deformation and structural changes in shock wave compression studies. {copyright} {ital 1999 American Institute of Physics.}

  2. Qualification of data obtained during a severe accident. Illustrative examples from TMI-2 evaluations

    SciTech Connect

    Rempe, Joy L.; Knudson, Darrell L.

    2015-02-01

    The accidents at the Three Mile Island Unit 2 (TMI-2) Pressurized Water Reactor (PWR) and the Daiichi Units 1, 2, and 3 Boiling Water Reactors (BWRs) provide unique opportunities to evaluate instrumentation exposed to severe accident conditions. Conditions associated with the release of coolant and the hydrogen burn that occurred during the TMI-2 accident exposed instrumentation to harsh conditions, including direct radiation, radioactive contamination, and high humidity with elevated temperatures and pressures. Post-TMI-2 instrumentation evaluation programs focused on data required by TMI-2 operators to assess the condition of the reactor and containment and the effect of mitigating actions taken by these operators. Prior efforts also focused on sensors providing data required for subsequent forensic evaluations and accident simulations. This paper provides additional details related to the formal process used to develop a qualified TMI-2 data base and presents data qualification details for three parameters: reactor coolant system (RCS) pressure; containment building temperature; and containment pressure. These selected examples illustrate the types of activities completed in the TMI-2 data qualification process and the importance of such a qualification effort. These details are described to facilitate implementation of a similar process using data and examinations at the Daiichi Units 1, 2, and 3 reactors so that BWR-specific benefits can be obtained.

  3. Casingless down-hole for sealing an ablation volume and obtaining a sample for analysis

    DOEpatents

    Noble, D.T.; Braymen, S.D.; Anderson, M.S.

    1996-10-01

    A casing-less down hole sampling system for acquiring a subsurface sample for analysis using an inductively coupled plasma system is disclosed. The system includes a probe which is pushed into the formation to be analyzed using a hydraulic ram system. The probe includes a detachable tip member which has a soil point and a barb, with the soil point aiding the penetration of the earth, and the barb causing the tip member to disengage from the probe and remain in the formation when the probe is pulled up. The probe is forced into the formation to be tested, and then pulled up slightly, to disengage the tip member and expose a column of the subsurface formation to be tested. An instrumentation tube mounted in the probe is then extended outward from the probe to longitudinally extend into the exposed column. A balloon seal mounted on the end of the instrumentation tube allows the bottom of the column to be sealed. A source of laser radiation is emitted from the instrumentation tube to ablate a sample from the exposed column. The instrumentation tube can be rotated in the probe to sweep the laser source across the surface of the exposed column. An aerosol transport system carries the ablated sample from the probe to the surface for testing in an inductively coupled plasma system. By testing at various levels in the down-hole as the probe is extracted from the soil, a profile of the subsurface formation may be obtained. 9 figs.

  4. Casingless down-hole for sealing an ablation volume and obtaining a sample for analysis

    DOEpatents

    Noble, Donald T.; Braymen, Steven D.; Anderson, Marvin S.

    1996-10-01

    A casing-less down hole sampling system for acquiring a subsurface sample for analysis using an inductively coupled plasma system is disclosed. The system includes a probe which is pushed into the formation to be analyzed using a hydraulic ram system. The probe includes a detachable tip member which has a soil point mad a barb, with the soil point aiding the penetration of the earth, and the barb causing the tip member to disengage from the probe and remain in the formation when the probe is pulled up. The probe is forced into the formation to be tested, and then pulled up slightly, to disengage the tip member and expose a column of the subsurface formation to be tested. An instrumentation tube mounted in the probe is then extended outward from the probe to longitudinally extend into the exposed column. A balloon seal mounted on the end of the instrumentation tube allows the bottom of the column to be sealed. A source of laser radiation is emitted from the instrumentation tube to ablate a sample from the exposed column. The instrumentation tube can be rotated in the probe to sweep the laser source across the surface of the exposed column. An aerosol transport system carries the ablated sample from the probe to the surface for testing in an inductively coupled plasma system. By testing at various levels in the down-hole as the probe is extracted from the soil, a profile of the subsurface formation may be obtained.

  5. Apparatus for transmitting power obtained by converting the exhaust energy of an engine

    SciTech Connect

    Miyajima, H.

    1988-08-30

    This patent describes an apparatus for transmitting power obtained by converting the exhaust energy of a primary engine, the primary engine having a crank shaft and an exhaust passage for passing exhaust gas from the engine. The apparatus consists of: an output turbine having an output shaft and an intake port coupled to the exhaust passage; a compressor mounted on the output shaft of the turbine and including an outlet port; a rotary type engine having a double jointed trochoidal shaped rotor housing, the housing having an expansion chamber with an intake port and an outlet port and a compression chamber, the engine further comprising an eccentrically rotatable generally triangular shaped rotor mounted within the housing and a rotor shaft coupled to the rotor. The outlet port of the compressor is coupled to the intake port of the expansion chamber, the outlet port of the expansion chamber being coupled to the intake port of the output turbine; and power transmitting means connected between the crank shaft of the primary engine and the rotor shaft of the rotary engine whereby auxiliary power is provided to the primary engine.

  6. Assessment of national systems for obtaining local acceptance of waste management siting and routing activities

    SciTech Connect

    Paige, H.W.; Lipman, D.S.; Owens, J.E.

    1980-07-01

    There is a rich mixture of formal and informal approaches being used in our sister nuclear democracies in their attempts to deal with the difficulties of obtaining local acceptance for siting of waste management facilities and activities. Some of these are meeting with a degree of success not yet achieved in the US. Although this survey documents and assesses many of these approaches, time did not permit addressing in any detail their relevance to common problems in the US. It would appear the US could benefit from a periodic review of the successes and failures of these efforts, including analysis of their applicability to the US system. Of those countries (Germany, Sweden, Switzerland, Japan, Belgium, and the US) who are working to a time table for the preparation of a high-level waste (HLW) repository, Germany is the only country to have gained local siting acceptance for theirs. With this (the most difficult of siting problems) behind them they appear to be in the best overall condition relative to waste management progress and plans. This has been achieved without a particularly favorable political structure, made up for by determination on the part of the political leadership. Of the remaining three countries studied (France, UK and Canada) France, with its AVM production facility, is clearly the world leader in the HLW immobilization aspect of waste management. France, Belgium and the UK appear to have the least favorable political structures and environments for arriving at waste management decisions. US, Switzerland and Canada appear to have the least favorable political structures and environments for arriving at waste management decisions.

  7. Analysis of liquid-solids suspension velocities and concentrations obtained by NMR imaging

    SciTech Connect

    Ding, J.; Lyczkowski, R.W.; Sha, W.T.; Altobelli, S.A.; Fukushima, E.

    1992-09-01

    COMMIX-M, a three-dimensional transient and steady-state computer program written in Cartesian and cylindrical coordinates, has been developed by Argonne National Laboratory. This computer program is capable of analyzing multiphase flow and heat transfer and utilizes the separate phases model wherein each phase has its own mass, momentum, and energy equations. This computer program is in its early stages of development for application to test various interphase interaction models and to predict design and processing of dense fluid-solids suspension systems. COMMIX-M contains preliminary constitutive relationships for interfacial drag, solids viscosities and stresses to describe the solids rheology, and shear lift forces from the literature. Also included is a solids partial slip boundary condition to allow non-zero tangential velocity at the tube walls. Analyses of some of the steady-state, fully-developed isothermal carrier fluid velocity and solids concentration data of Altobelli et al. and Sinton and Chow are presented. These experimental data obtained using three-dimensional time-of-flight nuclear magnetic (NMR) imaging techniques were carefully performed and represent some of the best available open literature data of their kind. NMR imaging offers powerful techniques to non-intrusively determine three-dimensional time-dependent velocity and concentration fields to assist development and validation of the constitutive models and the computer programs describing concentrated suspensions. Analyses of these NMR data, together with comparisons of computed and measured concentration and velocity profiles provide some insights into the mechanisms governing the observed phenomena. Recommendations for future research are given. To the authors` knowledge, these are the first such comparisons of theory and experiment.

  8. Analysis of liquid-solids suspension velocities and concentrations obtained by NMR imaging

    SciTech Connect

    Ding, J.; Lyczkowski, R.W.; Sha, W.T. ); Altobelli, S.A.; Fukushima, E. )

    1992-09-01

    COMMIX-M, a three-dimensional transient and steady-state computer program written in Cartesian and cylindrical coordinates, has been developed by Argonne National Laboratory. This computer program is capable of analyzing multiphase flow and heat transfer and utilizes the separate phases model wherein each phase has its own mass, momentum, and energy equations. This computer program is in its early stages of development for application to test various interphase interaction models and to predict design and processing of dense fluid-solids suspension systems. COMMIX-M contains preliminary constitutive relationships for interfacial drag, solids viscosities and stresses to describe the solids rheology, and shear lift forces from the literature. Also included is a solids partial slip boundary condition to allow non-zero tangential velocity at the tube walls. Analyses of some of the steady-state, fully-developed isothermal carrier fluid velocity and solids concentration data of Altobelli et al. and Sinton and Chow are presented. These experimental data obtained using three-dimensional time-of-flight nuclear magnetic (NMR) imaging techniques were carefully performed and represent some of the best available open literature data of their kind. NMR imaging offers powerful techniques to non-intrusively determine three-dimensional time-dependent velocity and concentration fields to assist development and validation of the constitutive models and the computer programs describing concentrated suspensions. Analyses of these NMR data, together with comparisons of computed and measured concentration and velocity profiles provide some insights into the mechanisms governing the observed phenomena. Recommendations for future research are given. To the authors' knowledge, these are the first such comparisons of theory and experiment.

  9. Development of a general method for obtaining the geometry of microfluidic networks

    SciTech Connect

    Razavi, Mohammad Sayed Salimpour, M. R.; Shirani, Ebrahim

    2014-01-15

    In the present study, a general method for geometry of fluidic networks is developed with emphasis on pressure-driven flows in the microfluidic applications. The design method is based on general features of network's geometry such as cross-sectional area and length of channels. Also, the method is applicable to various cross-sectional shapes such as circular, rectangular, triangular, and trapezoidal cross sections. Using constructal theory, the flow resistance, energy loss and performance of the network are optimized. Also, by this method, practical design strategies for the fabrication of microfluidic networks can be improved. The design method enables rapid prediction of fluid flow in the complex network of channels and is very useful for improving proper miniaturization and integration of microfluidic networks. Minimization of flow resistance of the network of channels leads to universal constants for consecutive cross-sectional areas and lengths. For a Y-shaped network, the optimal ratios of consecutive cross-section areas (A{sub i+1}/A{sub i}) and lengths (L{sub i+1}/L{sub i}) are obtained as A{sub i+1}/A{sub i} = 2{sup −2/3} and L{sub i+1}/L{sub i} = 2{sup −1/3}, respectively. It is shown that energy loss in the network is proportional to the volume of network. It is also seen when the number of channels is increased both the hydraulic resistance and the volume occupied by the network are increased in a similar manner. Furthermore, the method offers that fabrication of multi-depth and multi-width microchannels should be considered as an integral part of designing procedures. Finally, numerical simulations for the fluid flow in the network have been performed and results show very good agreement with analytic results.

  10. Investigation of nanocrystalline zinc chromite obtained by two soft chemical routes

    SciTech Connect

    Gingasu, Dana; Mindru, Ioana; Culita, Daniela C.; Patron, Luminita; Calderon-Moreno, Jose Maria; Preda, Silviu; Oprea, Ovidiu; Osiceanu, Petre; Morena Pineda, Eufemio

    2014-01-01

    Graphical abstract: - Highlights: • Two soft chemical routes to synthesize zinc chromites are described. • Glycine is used as chelating agent (precursor method) and fuel (solution combustion method). • The synthesized chromites have crystallite size in the range of 18–27 nm. • An antiferromagnetic (AFM) transition is observed at about T{sub N} ∼ 18 K. - Abstract: Zinc chromite (ZnCr{sub 2}O{sub 4}) nanocrystalline powders were obtained by two different chemical routes: the precursor method and the solution combustion method involving glycine-nitrates. The complex compound precursors, [ZnCr{sub 2}(NH{sub 2}CH{sub 2}COO){sub 8}]·9H{sub 2}O and [ZnCr{sub 2}(NH{sub 2}CH{sub 2}COOH){sub 4.5}]·(NO{sub 3}){sub 8}·6H{sub 2}O, were characterized by chemical analysis, infrared spectroscopy (IR), ultraviolet–visible spectroscopy (UV–vis) and thermal analysis. The structure, morphology, surface chemistry and magnetic properties of ZnCr{sub 2}O{sub 4} powders were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), infrared and Raman spectroscopy (RS), ultraviolet–visible spectroscopy (UV–vis) and magnetic measurements. X-ray diffraction patterns indicated the chromite spinel phase with good crystallinity and an average crystallite size of approximately 18–27 nm. The band gap values ranged between 3.31 and 3.33 eV. The magnetic measurements indicated an antiferromagnetic transition at T{sub N} ∼ 17.5/18 K.

  11. A NEW METHOD FOR OBTAINING THE STAR FORMATION LAW IN GALAXIES

    SciTech Connect

    Heiner, Jonathan S.; Allen, Ronald J.; Van der Kruit, Pieter C.

    2010-08-20

    We present a new observational method to evaluate the exponent of the star formation law as initially formulated by Schmidt, i.e., the power-law expression assumed to relate the rate of star formation in a volume of space to the local total gas volume density present there. Total volume densities in the gas clouds surrounding an OB association are determined with a simple model which considers the atomic hydrogen as a photodissociation product on the cloud surfaces. The photodissociating photon flux incident on the cloud is computed from the far-UV luminosity of the OB association and the geometry. As an example, we have applied this 'PDR Method' to a sample of star-forming regions in M33 using Very Large Array (VLA) 21 cm data for the H I and Galaxy Evolution Explorer (GALEX) imagery in the far-UV. With these two observables, our approach provides an estimate of the total volume density of hydrogen (atomic + molecular) in the gas clouds surrounding the young star cluster. A graph in logarithmic coordinates of the cluster UV luminosity versus the total density in the surrounding gas provides a direct measure of the exponent of the star formation law. However, we show that this plot is severely affected by observational selection, which renders large areas of the diagram inaccessible to the data. An ordinary least-squares regression fit to a straight line, therefore, gives a strongly biased result. In the present case, the slope of such a fit primarily reflects the boundary defined when the 21 cm line becomes optically thick and is no longer a reliable measure of the H I column density. We use a maximum likelihood statistical approach which can deal with truncated and skewed data, and also takes account of the large uncertainties in the total gas densities which we derive. The exponent we obtain for the Schmidt law in M33 is 1.4 {+-} 0.2.

  12. #WomenInSTEM: Stepping Stones From One Career to Another

    SciTech Connect

    Martin, Cheryl

    2014-11-24

    Meet Cheryl Martin, Acting Director of the Advanced Research Projects Agency for Energy (ARPA-E) and the latest profile in the Energy Department's #WomenInSTEM video series. Cheryl looks at transformational projects to explore the uncharted territories of energy technology to generate options for entirely new paths to create, store and use energy. There are many challenges to overcome in the energy field, and it's important to have a diverse set of voices in STEM careers to meet these demands. Cheryl recommends that young women include all the skills they have - those gained at formal jobs as well as through volunteering or nonprofit organizations - when they take their next career step. These skills form the stepping stones that lead from one career to the next. And with a solid grounding in STEM, the opportunities are endless.

  13. Measure Guideline. Five Steps to Implement the Public Housing Authority Energy-Efficient Unit Turnover Checklist

    SciTech Connect

    Liaukus, Christine

    2015-07-09

    Five Steps to Implementing the PHA Energy Efficient Unit Turnover Package (ARIES, 2014) is a guide to prepare for the installation of energy efficient measures during a typical public housing authority unit turnover. While a PHA is cleaning, painting and readying a unit for a new resident, there is an opportunity to incorporate energy efficiency measures to further improve the unit's performance. The measures on the list are simple enough to be implemented by in-house maintenance personnel, inexpensive enough to be folded into operating expenses without needing capital budget, and fast enough to implement without substantially changing the number of days between occupancies, a critical factor for organizations where the demand for dwelling units far outweighs the supply. The following guide lays out a five step plan to implement the EE Unit Turnover Package in your PHA, from an initial Self-Assessment through to Package Implementation.

  14. One-step electrochemical synthesis of a grapheneZnO hybrid for improved photocatalytic activity

    SciTech Connect

    Wei, Ang; Xiong, Li; Sun, Li; Liu, Yanjun; Li, Weiwei; Lai, Wenyong; Liu, Xiangmei; Wang, Lianhui; Huang, Wei; Dong, Xiaochen

    2013-08-01

    Graphical abstract: - Highlights: GrapheneZnO hybrid was synthesized by one-step electrochemical deposition. GrapheneZnO hybrid presents a special structure and wide UVvis absorption spectra. GrapheneZnO hybrid exhibits an exceptionally higher photocatalytic activity for the degradation of dye methylene blue. - Abstract: A grapheneZnO (G-ZnO) hybrid was synthesized by one-step electrochemical deposition. During the formation of ZnO nanostructure by cathodic electrochemical deposition, the graphene oxide was electrochemically reduced to graphene simultaneously. Scanning electron microscope images, X-ray photoelectron spectroscopy, X-ray diffraction, Raman spectra, and UVvis absorption spectra indicate the resulting G-ZnO hybrid presents a special structure and wide UVvis absorption spectra. More importantly, it exhibits an exceptionally higher photocatalytic activity for the degradation of dye methylene blue than that of pure ZnO nanostructure under both ultraviolet and sunlight irradiation.

  15. Printed circuit board impedance matching step for microwave (millimeter wave) devices

    DOEpatents

    Pao, Hsueh-Yuan; Aguirre, Jerardo; Sargis, Paul

    2013-10-01

    An impedance matching ground plane step, in conjunction with a quarter wave transformer section, in a printed circuit board provides a broadband microwave matching transition from board connectors or other elements that require thin substrates to thick substrate (>quarter wavelength) broadband microwave (millimeter wave) devices. A method of constructing microwave and other high frequency electrical circuits on a substrate of uniform thickness, where the circuit is formed of a plurality of interconnected elements of different impedances that individually require substrates of different thicknesses, by providing a substrate of uniform thickness that is a composite or multilayered substrate; and forming a pattern of intermediate ground planes or impedance matching steps interconnected by vias located under various parts of the circuit where components of different impedances are located so that each part of the circuit has a ground plane substrate thickness that is optimum while the entire circuit is formed on a substrate of uniform thickness.

  16. NREL Report Examines Energy Use in Cities and Proposes Next Steps for

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy Innovation - News Releases | NREL Report Examines Energy Use in Cities and Proposes Next Steps for Energy Innovation August 5, 2015 What U.S. cities are doing to reduce their energy use is outlined in a new report from the Energy Department's National Renewable Energy Laboratory (NREL) that sets the stage for broader discussion and analysis. Given increasing urbanization and their large energy footprint, cities are a prime focal point for establishing a clean energy future. The

  17. Step 2: Identify Rules, Roles, and Tools Constituting Context for Institutional Change

    Energy.gov [DOE]

    After determining your agency's institutional change sustainability goals, the next step is to analyze the context within which these goals are to be achieved. Start by identifying the organizational rules, roles, and tools that shape the current context and may influence success in achieving these goals. Identifying the linkages among rules, roles, and tools and how they interact will help in implementing solutions for success.

  18. Oxygen's promise for groundwater cleanup a step closer with SRNL research

    Office of Scientific and Technical Information (OSTI)

    | OSTI, US Dept of Energy Office of Scientific and Technical Information Oxygen's promise for groundwater cleanup a step closer with SRNL research Back to the OSTI News Listing for 2008 Dr. Brian Looney Senior Advisory Engineer SRNL Savannah River National Laboratory researchers Brian Looney and Miles Denham have patented an invention for allowing permeation of a subsurface area with the right quantity of oxygen for effective groundwater remediation. Oxygen has long held promise as a means

  19. Major next steps for fusion energy based on the spherical tokamak design |

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Princeton Plasma Physics Lab Major next steps for fusion energy based on the spherical tokamak design By John Greenwald August 24, 2016 Tweet Widget Google Plus One Share on Facebook Test cell of the National Spherical Torus Experiment-Upgrade with tokamak in the center. (Photo by Elle Starkman/PPPL Office of Communications) Test cell of the National Spherical Torus Experiment-Upgrade with tokamak in the center. Gallery: Physicist Jonathan Menard. (Photo by Elle Starkman/PPPL Office of

  20. Synthesis of Nanocrystalline Iron Nitrides Using Two-Step Reactive Milling

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Process - Energy Innovation Portal Energy Storage Energy Storage Building Energy Efficiency Building Energy Efficiency Advanced Materials Advanced Materials Find More Like This Return to Search Synthesis of Nanocrystalline Iron Nitrides Using Two-Step Reactive Milling Process Sandia National Laboratories Contact SNL About This Technology Publications: PDF Document Publication Market Sheet (161 KB) Technology Marketing Summary Nanocrystalline iron nitride is an important soft magnetic

  1. DOE Takes Next Steps to Expand Strategic Petroleum Reserve to One Billion

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Barrels | Department of Energy to Expand Strategic Petroleum Reserve to One Billion Barrels DOE Takes Next Steps to Expand Strategic Petroleum Reserve to One Billion Barrels December 8, 2006 - 9:34am Addthis Richton, Mississippi is Preferred New Site for Reserve WASHINGTON, DC - U.S. Department of Energy Secretary Samuel W. Bodman today announced that DOE has identified the salt domes at Richton, in Mississippi, as the preferred alternative to lead the expansion of the U.S. Strategic

  2. One Step Closer to the Marketplace for State-of-the-Art Wind Turbine

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Drivetrain | Wind | NREL One Step Closer to the Marketplace for State-of-the-Art Wind Turbine Drivetrain April 1, 2016 National Wind Technology Center (NWTC) researchers at the National Renewable Energy Laboratory (NREL) have entered the final phase of testing a next-generation drivetrain-the components of a wind turbine that convert the rotational energy of the rotor into electricity-that will be less expensive, more reliable, and more efficient. This project, funded by the Energy

  3. PPPL scientists take key step toward solving a major astrophysical mystery

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    | Princeton Plasma Physics Lab scientists take key step toward solving a major astrophysical mystery By John Greenwald September 10, 2014 Tweet Widget Google Plus One Share on Facebook This fast-camera image shows plasma during magnetic reconnection, with magnetic field lines rendered in white based on measurements made during the experiment. The converging horizontal lines represent the field lines prior to reconnection. The outgoing vertical lines represent the field lines after

  4. PPPL scientists take key step toward solving a major astrophysical mystery

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    | Princeton Plasma Physics Lab scientists take key step toward solving a major astrophysical mystery By John Greenwald September 10, 2014 Tweet Widget Google Plus One Share on Facebook This fast-camera image shows plasma during magnetic reconnection, with magnetic field lines rendered in white based on measurements made during the experiment. The converging horizontal lines represent the field lines prior to reconnection. The outgoing vertical lines represent the field lines after

  5. Two-Step Process Converts Lignin into Simple Aromatic Compounds - Energy

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Innovation Portal Two-Step Process Converts Lignin into Simple Aromatic Compounds Great Lakes Bioenergy Research Center Contact GLBRC About This Technology Technology Marketing Summary Lignin is a major component of non-edible biomass. It is a cheap byproduct of pulp and biofuel production and is one of the few naturally occurring sources of valuable aromatic compounds. Converting lignin's complex biopolymer structure into simple organic chemicals has attracted major interest. For example,

  6. Computing single step operators of logic programming in radial basis function neural networks

    SciTech Connect

    Hamadneh, Nawaf; Sathasivam, Saratha; Choon, Ong Hong

    2014-07-10

    Logic programming is the process that leads from an original formulation of a computing problem to executable programs. A normal logic program consists of a finite set of clauses. A valuation I of logic programming is a mapping from ground atoms to false or true. The single step operator of any logic programming is defined as a function (T{sub p}:I→I). Logic programming is well-suited to building the artificial intelligence systems. In this study, we established a new technique to compute the single step operators of logic programming in the radial basis function neural networks. To do that, we proposed a new technique to generate the training data sets of single step operators. The training data sets are used to build the neural networks. We used the recurrent radial basis function neural networks to get to the steady state (the fixed point of the operators). To improve the performance of the neural networks, we used the particle swarm optimization algorithm to train the networks.

  7. The impact of equivalence ratio oscillations on combustion dynamics in a backward-facing step combustor

    SciTech Connect

    Murat Altay, H.; Speth, Raymond L.; Hudgins, Duane E.; Ghoniem, Ahmed F.

    2009-11-15

    The combustion dynamics of propane-air flames are investigated in an atmospheric pressure, atmospheric inlet temperature, lean, premixed backward-facing step combustor. We modify the location of the fuel injector to examine the impact of equivalence ratio oscillations arriving at the flame on the combustion dynamics. Simultaneous pressure, velocity, heat-release rate and equivalence ratio measurements and high-speed video from the experiments are used to identify and characterize several distinct operating modes. When the fuel is injected far upstream from the step, the equivalence ratio arriving at the flame is steady and the combustion dynamics are controlled only by flame-vortex interactions. In this case, different dynamic regimes are observed depending on the operating parameters. When the fuel is injected close to the step, the equivalence ratio arriving at the flame exhibits oscillations. In the presence of equivalence ratio oscillations, the measured sound pressure level is significant across the entire range of lean mean equivalence ratios even if the equivalence ratio oscillations arriving at the flame are out-of-phase with the pressure oscillations. The combustion dynamics are governed primarily by the flame-vortex interactions, while the equivalence ratio oscillations have secondary effects. The equivalence ratio oscillations could generate variations in the combustion dynamics in each cycle under some operating conditions, destabilize the flame at the entire range of the lean equivalence ratios, and increase the value of the mean equivalence ratio at the lean blowout limit. (author)

  8. Multi-step process for concentrating magnetic particles in waste sludges

    DOEpatents

    Watson, John L.

    1990-01-01

    This invention involves a multi-step, multi-force process for dewatering sludges which have high concentrations of magnetic particles, such as waste sludges generated during steelmaking. This series of processing steps involves (1) mixing a chemical flocculating agent with the sludge; (2) allowing the particles to aggregate under non-turbulent conditions; (3) subjecting the mixture to a magnetic field which will pull the magnetic aggregates in a selected direction, causing them to form a compacted sludge; (4) preferably, decanting the clarified liquid from the compacted sludge; and (5) using filtration to convert the compacted sludge into a cake having a very high solids content. Steps 2 and 3 should be performed simultaneously. This reduces the treatment time and increases the extent of flocculation and the effectiveness of the process. As partially formed aggregates with active flocculating groups are pulled through the mixture by the magnetic field, they will contact other particles and form larger aggregates. This process can increase the solids concentration of steelmaking sludges in an efficient and economic manner, thereby accomplishing either of two goals: (a) it can convert hazardous wastes into economic resources for recycling as furnace feed material, or (b) it can dramatically reduce the volume of waste material which must be disposed.

  9. Multi-step process for concentrating magnetic particles in waste sludges

    DOEpatents

    Watson, J.L.

    1990-07-10

    This invention involves a multi-step, multi-force process for dewatering sludges which have high concentrations of magnetic particles, such as waste sludges generated during steelmaking. This series of processing steps involves (1) mixing a chemical flocculating agent with the sludge; (2) allowing the particles to aggregate under non-turbulent conditions; (3) subjecting the mixture to a magnetic field which will pull the magnetic aggregates in a selected direction, causing them to form a compacted sludge; (4) preferably, decanting the clarified liquid from the compacted sludge; and (5) using filtration to convert the compacted sludge into a cake having a very high solids content. Steps 2 and 3 should be performed simultaneously. This reduces the treatment time and increases the extent of flocculation and the effectiveness of the process. As partially formed aggregates with active flocculating groups are pulled through the mixture by the magnetic field, they will contact other particles and form larger aggregates. This process can increase the solids concentration of steelmaking sludges in an efficient and economic manner, thereby accomplishing either of two goals: (a) it can convert hazardous wastes into economic resources for recycling as furnace feed material, or (b) it can dramatically reduce the volume of waste material which must be disposed. 7 figs.

  10. U-163: PHP Command Parameter Bug Lets Remote Users Obtain Potentially Sensitive Information and Execute Arbitrary Code

    Energy.gov [DOE]

    A vulnerability was reported in PHP. A remote user can obtain potentially sensitive information. A remote user can execute arbitrary code on the target system.

  11. Step-edge-induced resistance anisotropy in quasi-free-standing bilayer chemical vapor deposition graphene on SiC

    SciTech Connect

    Ciuk, Tymoteusz [Institute of Electronic Materials Technology, Wolczynska 133, 01-919 Warsaw (Poland); Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw (Poland); Cakmakyapan, Semih; Ozbay, Ekmel [Department of Electrical and Electronics Engineering, Department of Physics, Nanotechnology Research Center, Bilkent University, 06800 Bilkent, Ankara (Turkey); Caban, Piotr; Grodecki, Kacper; Pasternak, Iwona; Strupinski, Wlodek, E-mail: wlodek.strupinski@itme.edu.pl [Institute of Electronic Materials Technology, Wolczynska 133, 01-919 Warsaw (Poland); Krajewska, Aleksandra [Institute of Electronic Materials Technology, Wolczynska 133, 01-919 Warsaw (Poland); Institute of Optoelectronics, Military University of Technology, Gen. S. Kaliskiego 2, 00-908 Warsaw (Poland); Szmidt, Jan [Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw (Poland)

    2014-09-28

    The transport properties of quasi-free-standing (QFS) bilayer graphene on SiC depend on a range of scattering mechanisms. Most of them are isotropic in nature. However, the SiC substrate morphology marked by a distinctive pattern of the terraces gives rise to an anisotropy in graphene's sheet resistance, which may be considered an additional scattering mechanism. At a technological level, the growth-preceding in situ etching of the SiC surface promotes step bunching which results in macro steps ~10 nm in height. In this report, we study the qualitative and quantitative effects of SiC steps edges on the resistance of epitaxial graphene grown by chemical vapor deposition. We experimentally determine the value of step edge resistivity in hydrogen-intercalated QFS-bilayer graphene to be ~190 ??m for step height hS = 10 nm and provide proof that it cannot originate from mechanical deformation of graphene but is likely to arise from lowered carrier concentration in the step area. Our results are confronted with the previously reported values of the step edge resistivity in monolayer graphene over SiC atomic steps. In our analysis, we focus on large-scale, statistical properties to foster the scalable technology of industrial graphene for electronics and sensor applications.

  12. Methods of operation of apparatus measuring formation resistivity from within a cased well having one measurement and two compensation steps

    DOEpatents

    Vail, III, William B.

    1993-01-01

    Methods of operation of an apparatus having at least two pairs of voltage measurement electrodes vertically disposed in a cased well to measure the resistivity of adjacent geological formations from inside the cased well. During stationary measurements with the apparatus at a fixed vertical depth within the cased well, the invention herein discloses methods of operation which include a measurement step and subsequent first and second compensation steps respectively resulting in improved accuracy of measurement. First and second order errors of measurement are identified, and the measurement step and two compensation steps provide methods to substantially eliminate their influence on the results. A multiple frequency apparatus adapted to movement within the well is described which simultaneously provide the measurement and two compensation steps.

  13. Synthesis of fluorescent carbon nanoparticles directly from active carbon via a one-step ultrasonic treatment

    SciTech Connect

    Li, Haitao; He, Xiaodie; Liu, Yang; Yu, Hang; Kang, Zhenhui; Lee, Shuit-Tong

    2011-01-15

    Water-soluble fluorescent carbon nanoparticles were synthesized directly from active carbon by a one-step hydrogen peroxide-assisted ultrasonic treatment. The carbon nanoparticles were characterized by transmission electron microscopy, optical fluorescent microscopy, fluorescent spectroscopy, Fourier transform infrared spectroscopy and ultraviolet-visible spectrophotometer. The results showed that the surface of carbon nanoparticles was rich of hydroxyl groups resulting in high hydrophilicity. The carbon nanoparticles could emit bright and colorful photoluminescence covering the entire visible-to-near infrared spectral range. Furthermore, these carbon nanoparticles also had excellent up-conversion fluorescent properties.

  14. Effect of surface steps on the microstructure of lateral composition modulation

    SciTech Connect

    FOLLSTAEDT,DAVID M.; NORMAN,A.G.; RENO,JOHN L.; JONES,ERIC D.; TWESTEN,R.D.; LEE,STEPHEN R.; MOUTINHO,H.; MASCARENHAS,A.

    2000-03-23

    Growth of InAs/AlAs short-period superlattices on appropriately miscut (001) InP substrates is shown to alter the microstructure of composition modulation from a 2D organization of short compositionally enriched wires to a single dominant modulation direction and wire lengths up to {approximately}1 {micro}m. The effects of miscut are interpreted in terms of surface step orientation and character. The material is strongly modulated and exhibits intense optical emission. The 1D modulations appear potentially useful for new devices that take advantage of the preferred direction formed in the growth plane.

  15. Modeling and experimental characterization of stepped and v-shaped (311) defects in silicon

    SciTech Connect

    Marqus, Luis A. Aboy, Mara; Dudeck, Karleen J.; Botton, Gianluigi A.; Knights, Andrew P.; Gwilliam, Russell M.

    2014-04-14

    We propose an atomistic model to describe extended (311) defects in silicon. It is based on the combination of interstitial and bond defect chains. The model is able to accurately reproduce not only planar (311) defects but also defect structures that show steps, bends, or both. We use molecular dynamics techniques to show that these interstitial and bond defect chains spontaneously transform into extended (311) defects. Simulations are validated by comparing with precise experimental measurements on actual (311) defects. The excellent agreement between the simulated and experimentally derived structures, regarding individual atomic positions and shape of the distinct structural (311) defect units, provides strong evidence for the robustness of the proposed model.

  16. Major next steps proposed for development of fusion energy based on the

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    spherical tokamak design | Princeton Plasma Physics Lab

    Major next steps proposed for development of fusion energy based on the spherical tokamak design By John Greenwald August 24, 2016 Tweet Widget Google Plus One Share on Facebook Phhysicist Jonathan Menard (Photo by Elle Starkman/Office of Communications) Phhysicist Jonathan Menard Gallery: Center stack of the NSTX-U. (Photo by Elle Starkman/PPPL Office of Communications) Center stack of the NSTX-U. NSTX-U test cell with tokamak in

  17. A.J. Stewart Smith to step down as Princeton University vice president for

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    PPPL in 2016 | Princeton Plasma Physics Lab A.J. Stewart Smith to step down as Princeton University vice president for PPPL in 2016 By John Greenwald July 24, 2015 Tweet Widget Google Plus One Share on Facebook A.J. Stewart Smith (Photo by Elle Starkman/Office of Communications) A.J. Stewart Smith Gallery: Smith, second from left, scoring a goal for the Vancouver Carlings during a 1961 Canadian National Lacrosse Championship game. (Photo by Photo courtesy of A.J. Stewart Smith) Smith, second

  18. A.J. Stewart Smith to step down as Princeton University vice president for

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    PPPL in 2016 | Princeton Plasma Physics Lab A.J. Stewart Smith to step down as Princeton University vice president for PPPL in 2016 By John Greenwald July 24, 2015 Tweet Widget Google Plus One Share on Facebook A.J. Stewart Smith (Photo by Elle Starkman/Office of Communications) A.J. Stewart Smith Gallery: Smith, second from left, scoring a goal for the Vancouver Carlings during a 1961 Canadian National Lacrosse Championship game. (Photo by Photo courtesy of A.J. Stewart Smith) Smith, second

  19. Preparatory steps for a robust dynamic model for organically bound tritium dynamics in agricultural crops

    SciTech Connect

    Melintescu, A.; Galeriu, D.; Diabate, S.; Strack, S.

    2015-03-15

    The processes involved in tritium transfer in crops are complex and regulated by many feedback mechanisms. A full mechanistic model is difficult to develop due to the complexity of the processes involved in tritium transfer and environmental conditions. First, a review of existing models (ORYZA2000, CROPTRIT and WOFOST) presenting their features and limits, is made. Secondly, the preparatory steps for a robust model are discussed, considering the role of dry matter and photosynthesis contribution to the OBT (Organically Bound Tritium) dynamics in crops.

  20. Interior Regional Housing Authority - A Step Toward Conservation for Interior Alaska Tribes

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    I nterior nterior R R egional egional H H ousing ousing A A uthority uthority Tiffany Simmons 800-478-4742 828 27 th Ave. Fairbanks, AK 99701 "A Step Towards Conservation for Interior Alaska Tribes" Hughes, Huslia, Allakaket and Birch Creek 1 1 IRHA is the Tribally Designated Housing Entity IRHA is the Tribally Designated Housing Entity (TDHE) for 29 of the 34 tribes in the Tanana (TDHE) for 29 of the 34 tribes in the Tanana Chiefs/Doyon Region. Chiefs/Doyon Region. 2 IRHA & Energy

  1. Real-time, single-step bioassay using nanoplasmonic resonator with ultra-high sensitivity

    DOEpatents

    Zhang, Xiang; Ellman, Jonathan A; Chen, Fanqing Frank; Su, Kai-Hang; Wei, Qi-Huo; Sun, Cheng

    2014-04-01

    A nanoplasmonic resonator (NPR) comprising a metallic nanodisk with alternating shielding layer(s), having a tagged biomolecule conjugated or tethered to the surface of the nanoplasmonic resonator for highly sensitive measurement of enzymatic activity. NPRs enhance Raman signals in a highly reproducible manner, enabling fast detection of protease and enzyme activity, such as Prostate Specific Antigen (paPSA), in real-time, at picomolar sensitivity levels. Experiments on extracellular fluid (ECF) from paPSA-positive cells demonstrate specific detection in a complex bio-fluid background in real-time single-step detection in very small sample volumes.

  2. A direct-drive exploding-pusher implosion as the first step in development of a monoenergetic charged-particle backlighting platforn at the National Ignition Facility

    DOE PAGES [OSTI]

    Rosenberg, M. J.; Zylstra, A. B.; Seguin, F. H.; Rinderknecht, H. G.; Frenje, J. A.; Johnson, M. Gatu; Sio, H.; Waugh, C. J.; Li, C. K.; Petrasso, R. D.; et al

    2016-01-18

    A thin-glass-shell, D3He-filled exploding-pusher inertial confinement fusion implosion at the National Ignition Facility (NIF) has been demonstrated as a proton source that serves as a promising first step toward development of a monoenergetic proton, alpha, and triton backlighting platform at the NIF. Among the key measurements, the D3He-proton emission on this experiment (shot N121128) has been well-characterized spectrally, temporally, and in terms of emission isotropy, revealing a highly monoenergetic (ΔE/E~4%) and isotropic source (~3% proton fluence variation and ~0.5% proton energy variation). On a similar shot (N130129, with D2 fill), the DD-proton spectrum has been obtained as well, illustrating thatmore » monoenergetic protons of multiple energies may be utilized in a single experiment. In conclusion, these results, and experiments on OMEGA, point toward future steps in the development of a precision, monoenergetic proton, alpha, and triton source that can readily be implemented at the NIF for backlighting a broad range of high energy density physics (HEDP) experiments in which fields and flows are manifest, and also utilized for studies of stopping power in warm dense matter and in classical plasmas.« less

  3. Proceedings of the international workshop on engineering design of next step reversed field pinch devices

    SciTech Connect

    Thomson, D.B.

    1987-11-01

    These Proceedings contain the formal contributed papers, the workshop papers and workshop summaries presented at the International Workshop on Engineering Design of Next Step RFP Devices held at Los Alamos, July 13-17, 1987. Contributed papers were presented at formal sessions on the topics: (1) physics overview (3 papers); (2) general overview (3 papers); (3) front-end (9 papers); (4) computer control and data acquisition (1 paper); (5) magnetics (5 papers); and (6) electrical design (9 papers). Informal topical workshop sessions were held on the topics: (1) RFP physics (9 papers); (2) front-end (7 papers); (3) magnetics (3 papers); and (4) electrical design (1 paper). This volume contains the summaries written by the Chairmen of each of the informal topical workshop sessions. The papers in these Proceedings represent a significant review of the status of the technical base for the engineering design of the next step RFP devices being developed in the US, Europe, and Japan, as of this date.

  4. Cellobiohydrolase 1 from Trichoderma reesei degrades cellulose in single cellobiose steps

    SciTech Connect

    Brady, Sonia K.; Sreelatha, Sarangapani; Feng, Yinnian; Chundawat, Shishir P. S.; Lang, Matthew J.

    2015-12-10

    Cellobiohydrolase 1 from Trichoderma reesei (TrCel7A) processively hydrolyses cellulose into cellobiose. Although enzymatic techniques have been established as promising tools in biofuel production, a clear understanding of the motor’s mechanistic action has yet to be revealed. We develop an optical tweezers-based single-molecule (SM) motility assay for precision tracking of TrCel7A. Direct observation of motility during degradation reveals processive runs and distinct steps on the scale of 1 nm. Our studies suggest TrCel7A is not mechanically limited, can work against 20 pN loads and speeds up when assisted. Temperature-dependent kinetic studies establish the energy requirements for the fundamental stepping cycle, which likely includes energy from glycosidic bonds and other sources. Moreover, through SM measurements of isolated TrCel7A domains, we determine that the catalytic domain alone is sufficient for processive motion, providing insight into TrCel7A’s molecular motility mechanism.

  5. Cellobiohydrolase 1 from Trichoderma reesei degrades cellulose in single cellobiose steps

    DOE PAGES [OSTI]

    Brady, Sonia K.; Sreelatha, Sarangapani; Feng, Yinnian; Chundawat, Shishir P. S.; Lang, Matthew J.

    2015-12-10

    Cellobiohydrolase 1 from Trichoderma reesei (TrCel7A) processively hydrolyses cellulose into cellobiose. Although enzymatic techniques have been established as promising tools in biofuel production, a clear understanding of the motor’s mechanistic action has yet to be revealed. We develop an optical tweezers-based single-molecule (SM) motility assay for precision tracking of TrCel7A. Direct observation of motility during degradation reveals processive runs and distinct steps on the scale of 1 nm. Our studies suggest TrCel7A is not mechanically limited, can work against 20 pN loads and speeds up when assisted. Temperature-dependent kinetic studies establish the energy requirements for the fundamental stepping cycle, whichmore » likely includes energy from glycosidic bonds and other sources. Moreover, through SM measurements of isolated TrCel7A domains, we determine that the catalytic domain alone is sufficient for processive motion, providing insight into TrCel7A’s molecular motility mechanism.« less

  6. Elise - the next step in development of induction heavy ion drivers for inertial fusion energy

    SciTech Connect

    Lee, E.; Bangerter, R.O.; Celata, C.; Faltens, A.; Fessenden, T.; Peters, C.; Pickrell, J.; Reginato, L.; Seidl, P.; Yu, S.

    1994-11-01

    LBL, with the participation of LLNL and industry, proposes to build Elise, an electric-focused accelerator as the next logical step towards the eventual goal of a heavy-ion induction linac powerful enough to implode or {open_quotes}drive{close_quotes} inertial-confinement fusion targets. Elise will be at full driver scale in several important parameters-most notably line charge density (a function of beam size), which was not explored in earlier experiments. Elise will be capable of accelerating and electrostatically focusing four parallel, full-scale ion beams and will be designed to be extendible, by successive future construction projects, to meet the goal of the USA DOE Inertial Fusion Energy program (IFE). This goal is to address all remaining issues in heavy-ion IFE except target physics, which is currently the responsibility of DOE Defense Programs, and the target chamber. Thus Elise is the first step of a program that will provide a solid foundation of data for further progress toward a driver, as called for in the National Energy Strategy and National Energy Policy Act.

  7. A Semi-Empirical Two Step Carbon Corrosion Reaction Model in PEM Fuel Cells

    SciTech Connect

    Young, Alan; Colbow, Vesna; Harvey, David; Rogers, Erin; Wessel, Silvia

    2013-01-01

    The cathode CL of a polymer electrolyte membrane fuel cell (PEMFC) was exposed to high potentials, 1.0 to 1.4 V versus a reversible hydrogen electrode (RHE), that are typically encountered during start up/shut down operation. While both platinum dissolution and carbon corrosion occurred, the carbon corrosion effects were isolated and modeled. The presented model separates the carbon corrosion process into two reaction steps; (1) oxidation of the carbon surface to carbon-oxygen groups, and (2) further corrosion of the oxidized surface to carbon dioxide/monoxide. To oxidize and corrode the cathode catalyst carbon support, the CL was subjected to an accelerated stress test cycled the potential from 0.6 VRHE to an upper potential limit (UPL) ranging from 0.9 to 1.4 VRHE at varying dwell times. The reaction rate constants and specific capacitances of carbon and platinum were fitted by evaluating the double layer capacitance (Cdl) trends. Carbon surface oxidation increased the Cdl due to increased specific capacitance for carbon surfaces with carbon-oxygen groups, while the second corrosion reaction decreased the Cdl due to loss of the overall carbon surface area. The first oxidation step differed between carbon types, while both reaction rate constants were found to have a dependency on UPL, temperature, and gas relative humidity.

  8. Flame-vortex interaction driven combustion dynamics in a backward-facing step combustor

    SciTech Connect

    Altay, H. Murat; Speth, Raymond L.; Hudgins, Duane E.; Ghoniem, Ahmed F.

    2009-05-15

    The combustion dynamics of propane-hydrogen mixtures are investigated in an atmospheric pressure, lean, premixed backward-facing step combustor. We systematically vary the equivalence ratio, inlet temperature and fuel composition to determine the stability map of the combustor. Simultaneous pressure, velocity, heat release rate and equivalence ratio measurements and high-speed video from the experiments are used to identify and characterize several distinct operating modes. When fuel is injected far upstream from the step, the equivalence ratio entering the flame is temporally and spatially uniform, and the combustion dynamics are governed only by flame-vortex interactions. Four distinct dynamic regimes are observed depending on the operating parameters. At high but lean equivalence ratios, the flame is unstable and oscillates strongly as it is wrapped around the large unsteady wake vortex. At intermediate equivalence ratios, weakly oscillating quasi-stable flames are observed. Near the lean blowout limit, long stable flames extending from the corner of the step are formed. At atmospheric inlet temperature, the unstable mode resonates at the 1/4 wavemode of the combustor. As the inlet temperature is increased, the 5/4 wavemode of the combustor is excited at high but lean equivalence ratios, forming the high-frequency unstable flames. Higher hydrogen concentration in the fuel and higher inlet temperatures reduce the equivalence ratios at which the transitions between regimes are observed. We plot combustion dynamics maps or the response curves, that is the overall sound pressure level as a function of the equivalence ratio, for different operating conditions. We demonstrate that numerical results of strained premixed flames can be used to collapse the response curves describing the transitions among the dynamic modes onto a function of the heat release rate parameter alone, rather than a function dependent on the equivalence ratio, inlet temperature and fuel

  9. The effect of different annealing temperatures on tin and cadmium telluride phases obtained by a modified chemical route

    SciTech Connect

    Mesquita, Anderson Fuzer; Porto, Arilza de Oliveira; Magela de Lima, Geraldo; Paniago, Roberto; Ardisson, Jos Domingos

    2012-11-15

    Graphical abstract: Display Omitted Highlights: ? Synthesis of cadmium and tin telluride. ? Chemical route to obtain pure crystalline cadmium and tin telluride. ? Effect of the annealing temperature on the crystalline phases. ? Removal of tin oxide as side product through thermal treatment. -- Abstract: In this work tin and cadmium telluride were prepared by a modification of a chemical route reported in the literature to obtain metallacycles formed by oxidative addition of tin-tellurium bonds to platinum (II). Through this procedure it was possible to obtain tin and cadmium telluride. X-ray diffraction and X-ray photoelectron spectroscopy were used to identify the crystalline phases obtained as well as the presence of side products. In the case of tin telluride it was identified potassium chloride, metallic tellurium and tin oxide as contaminants. The tin oxidation states were also monitored by {sup 119}Sn Mssbauer spectroscopy. The annealing in hydrogen atmosphere was chosen as a strategy to reduce the tin oxide and promote its reaction with the excess of tellurium present in the medium. The evolution of this tin oxide phase was studied through the annealing of the sample at different temperatures. Cadmium telluride was obtained with high degree of purity (98.5% relative weight fraction) according to the Rietveld refinement of X-ray diffraction data. The modified procedure showed to be very effective to obtain amorphous tin and cadmium telluride and the annealing at 450 C has proven to be useful to reduce the amount of oxide produced as side product.

  10. Strengthening Clean Energy Technology Cooperation under the UNFCCC: Steps toward Implementation

    SciTech Connect

    Benioff, R.; de Coninck, H.; Dhar, S.; Hansen, U.; McLaren, J.; Painuly, J.

    2010-08-01

    Development of a comprehensive and effective global clean technology cooperation framework will require years of experimenting and evaluation with new instruments and institutional arrangements before it is clear what works on which scale and in which region or country. In presenting concrete examples, this paper aims to set the first step in that process by highlighting successful models and innovative approaches that can inform efforts to ramp up clean energy technology cooperation. This paper reviews current mechanisms and international frameworks for global cooperation on clean energy technologies, both within and outside of the UNFCCC, and provides selected concrete options for scaling up global cooperation on clean energy technology RD&D, enabling environment, and financing.

  11. Transport processes investigation: A necessary first step in site scale characterization plans

    SciTech Connect

    Roepke, C.; Glass, R.J.; Brainard, J.; Mann, M.; Kriel, K.; Holt, R.; Schwing, J.

    1995-03-01

    We propose an approach, which we call the Transport Processes Investigation or TPI, to identify and verify site-scale transport processes and their controls. The TPI aids in the formulation of an accurate conceptual model of flow and transport, an essential first step in the development of a cost effective site characterization strategy. The TPI is demonstrated in the highly complex vadose zone of glacial tills that underlie the Fernald Environmental Remediation Project (FEMP) in Fernald, Ohio. As a result of the TPI, we identify and verify the pertinent flow processes and their controls, such as extensive macropore and fracture flow through layered clays, which must be included in an accurate conceptual model of site-scale contaminant transport. We are able to conclude that the classical modeling and sampling methods employed in some site characterization programs will be insufficient to characterize contaminant concentrations or distributions at contaminated or hazardous waste facilities sited in such media.

  12. Modeling the Auto-Ignition of Biodiesel Blends with a Multi-Step Model

    SciTech Connect

    Toulson, Dr. Elisa; Allen, Casey M; Miller, Dennis J; McFarlane, Joanna; Schock, Harold; Lee, Tonghun

    2011-01-01

    There is growing interest in using biodiesel in place of or in blends with petrodiesel in diesel engines; however, biodiesel oxidation chemistry is complicated to directly model and existing surrogate kinetic models are very large, making them computationally expensive. The present study describes a method for predicting the ignition behavior of blends of n-heptane and methyl butanoate, fuels whose blends have been used in the past as a surrogate for biodiesel. The autoignition is predicted using a multistep (8-step) model in order to reduce computational time and make this a viable tool for implementation into engine simulation codes. A detailed reaction mechanism for n-heptane-methyl butanoate blends was used as a basis for validating the multistep model results. The ignition delay trends predicted by the multistep model for the n-heptane-methyl butanoate blends matched well with that of the detailed CHEMKIN model for the majority of conditions tested.

  13. Quantifying Reliability - The Next Step for a Rapidly Maturing PV Industry and China's Role

    SciTech Connect

    Kurtz, Sarah

    2015-10-14

    PV customers wish to know how long their PV modules will last, but quantitatively predicting service life is difficult because of the large number of ways that a module can fail, the variability of the use environment, the cost of the testing, and the short product development time, especially when compared with the long desired lifetime. China should play a key role in developing international standards because China manufactures most of the world's PV modules. The presentation will describe the steps that need to be taken to create a service life prediction within the context of a defined bill of materials, process window and use environment. Worldwide standards for cost-effective approaches to service-life predictions will be beneficial to both PV customers and manufacturers since the consequences of premature module failure can be disastrous for both.

  14. Quantum dynamics via Planck-scale-stepped action-carrying 'Graph Paths'

    SciTech Connect

    Chew, Geoffrey F.

    2003-05-05

    A divergence-free, parameter-free, path-based discrete-time quantum dynamics is designed to not only enlarge the achievements of general relativity and the standard particle model, by approximations at spacetime scales far above Planck scale while far below Hubble scale, but to allow tackling of hitherto inaccessible questions. ''Path space'' is larger than and precursor to Hilbert-space basis. The wave-function-propagating paths are action-carrying structured graphs-cubic and quartic structured vertices connected by structured ''fermionic'' or ''bosonic'' ''particle'' and ''nonparticle'' arcs. A Planck-scale path step determines the gravitational constant while controlling all graph structure. The basis of the theory's (zero-rest-mass) elementary-particle Hilbert space (which includes neither gravitons nor scalar bosons) resides in particle arcs. Nonparticle arcs within a path are responsible for energy and rest mass.

  15. Two-step fabrication technique of gold tips for use in point-contact spectroscopy

    SciTech Connect

    Narasiwodeyar, S.; Dwyer, M.; Liu, M.; Park, W. K. Greene, L. H.

    2015-03-15

    For a successful point-contact spectroscopy (PCS) measurement, metallic tips of proper shape and smoothness are essential to ensure the ballistic nature of a point-contact junction. Until recently, the fabrication of Au tips suitable for use in point-contact spectroscopy has remained more of an art involving a trial and error method rather than an automated scientific process. To address these issues, we have developed a technique with which one can prepare high quality Au tips reproducibly and systematically. It involves an electronic control of the driving voltages used for an electrochemical etching of a gold wire in a HCl-glycerol mixture or a HCl solution. We find that a stopping current, below which the circuit is set to shut off, is a single very important parameter to produce an Au tip of desired shape. We present detailed descriptions for a two-step etching process for Au tips and also test results from PCS measurements using them.

  16. Source term experiment STEP-3 simulating a PWR severe station blackout

    SciTech Connect

    Simms, R.; Baker, L. Jr.; Ritzman, R.L.

    1987-05-21

    For a severe PWR accident that leads to a loss of feedwater to the steam generators, such as might occur in a station blackout, fission product decay heating will cause a water boiloff. Without effective cooling of the core, steam will begin to oxidize the Zircaloy cladding. The noble gases and volatile fission products, such as Cs and I, that are major contributors to the radiological source term, will be released from the damaged fuel shortly after cladding failure. The accident environment when these volatile fission products escape was simulated in STEP-3 using four fuel elements from the Belgonucleaire BR3 reactor. The primary objective was to examine the releases in samples collected as close to the test zone as possible. In this paper, an analysis of the temperatures and hydrogen generation is compared with the measurements. The analysis is needed to estimate releases and characterize conditions at the source for studies of fission product transport.

  17. The Multi-Step CADIS method for shutdown dose rate calculations and uncertainty propagation

    DOE PAGES [OSTI]

    Ibrahim, Ahmad M.; Peplow, Douglas E.; Grove, Robert E.; Peterson, Joshua L.; Johnson, Seth R.

    2015-12-01

    Shutdown dose rate (SDDR) analysis requires (a) a neutron transport calculation to estimate neutron flux fields, (b) an activation calculation to compute radionuclide inventories and associated photon sources, and (c) a photon transport calculation to estimate final SDDR. In some applications, accurate full-scale Monte Carlo (MC) SDDR simulations are needed for very large systems with massive amounts of shielding materials. However, these simulations are impractical because calculation of space- and energy-dependent neutron fluxes throughout the structural materials is needed to estimate distribution of radioisotopes causing the SDDR. Biasing the neutron MC calculation using an importance function is not simple becausemore » it is difficult to explicitly express the response function, which depends on subsequent computational steps. Furthermore, the typical SDDR calculations do not consider how uncertainties in MC neutron calculation impact SDDR uncertainty, even though MC neutron calculation uncertainties usually dominate SDDR uncertainty.« less

  18. The Multi-Step CADIS method for shutdown dose rate calculations and uncertainty propagation

    SciTech Connect

    Ibrahim, Ahmad M.; Peplow, Douglas E.; Grove, Robert E.; Peterson, Joshua L.; Johnson, Seth R.

    2015-12-01

    Shutdown dose rate (SDDR) analysis requires (a) a neutron transport calculation to estimate neutron flux fields, (b) an activation calculation to compute radionuclide inventories and associated photon sources, and (c) a photon transport calculation to estimate final SDDR. In some applications, accurate full-scale Monte Carlo (MC) SDDR simulations are needed for very large systems with massive amounts of shielding materials. However, these simulations are impractical because calculation of space- and energy-dependent neutron fluxes throughout the structural materials is needed to estimate distribution of radioisotopes causing the SDDR. Biasing the neutron MC calculation using an importance function is not simple because it is difficult to explicitly express the response function, which depends on subsequent computational steps. Furthermore, the typical SDDR calculations do not consider how uncertainties in MC neutron calculation impact SDDR uncertainty, even though MC neutron calculation uncertainties usually dominate SDDR uncertainty.

  19. A two-step route to planar perovskite cells exhibiting reduced hysteresis

    SciTech Connect

    Ip, Alexander H.; Adachi, Michael M.; McDowell, Jeffrey J.; Xu, Jixian; Sargent, Edward H.; Quan, Li Na; Kim, Dong Ha

    2015-04-06

    A simple two-step method was used to produce efficient planar organolead halide perovskite solar cells. Films produced using solely iodine containing precursors resulted in poor morphology and failed devices, whereas addition of chlorine to the process greatly improved morphology and resulted in dense, uniform perovskite films. This process was used to produce perovskite solar cells with a fullerene-based passivation layer. The hysteresis effect, to which planar perovskite devices are otherwise prone, was greatly suppressed through the use of this interface modifier. The combined techniques resulted in perovskite solar cells having a stable efficiency exceeding 11%. This straightforward fabrication procedure holds promise in development of various optoelectronic applications of planar perovskite films.

  20. Transparent ultralow-density silica aerogels prepared by a two-step sol-gel process

    SciTech Connect

    Tillotson, T.M.; Hrubesh, L.W.

    1991-09-01

    Conventional silica sol-gel chemistry is limited for the production of transparent ultralow-density aerogels because (1) gelation is either slow or unachievable, and (2) even when gelation is achieved, the large pore sizes result in loss of transparency for aerogels <.020 g/cc. We have developed a two-step sol-gel process that circumvents the limitations of the conventional process and allows the formation of ultralow-density gels in a matter of hours. we have found that the gel time is dependent on the catalyst concentration. After supercritical extraction, the aerogels are transparent, uncracked tiles with densities as low as .003 g/cc. 6 figs., 11 refs.

  1. Plasma-material Interactions in Current Tokamaks and their Implications for Next-step Fusion Reactors

    SciTech Connect

    Federici, G.; Skinner, C.H.; Brooks, J.N.; Coad, J.P.; Grisolia, C.

    2001-01-10

    The major increase in discharge duration and plasma energy in a next-step DT [deuterium-tritium] fusion reactor will give rise to important plasma-material effects that will critically influence its operation, safety, and performance. Erosion will increase to a scale of several centimeters from being barely measurable at a micron scale in today's tokamaks. Tritium co-deposited with carbon will strongly affect the operation of machines with carbon plasma-facing components. Controlling plasma wall interactions is critical to achieving high performance in present-day tokamaks and this is likely to continue to be the case in the approach to practical fusion reactors. Recognition of the important consequences of these phenomena has stimulated an internationally coordinated effort in the field of plasma-surface interactions supporting the Engineering Design Activities of the International Thermonuclear Experimental Reactor (ITER) project and significant progress has been made in better under standing these issues. This paper reviews the underlying physical processes and the existing experimental database of plasma-material interactions both in tokamaks and laboratory simulation facilities for conditions of direct relevance to next-step fusion reactors. Two main topical groups of interactions are considered: (i) erosion/redeposition from plasma sputtering and disruptions, including dust and flake generation, (ii) tritium retention and removal. The use of modeling tools to interpret the experimental results and make projections for conditions expected in future devices is explained. Outstanding technical issues and specific recommendations on potential R and D [Research and Development] avenues for their resolution are presented.

  2. Potential Next Steps for the New Orleans City Council Energy Efficiency Resolution

    SciTech Connect

    Doris, E.

    2011-09-01

    This document is adapted from an actual February 2008 deliverable memo and report delivered by the National Renewable Energy Laboratory (NREL) to the City Council of New Orleans, the office of the Mayor of New Orleans, the Chairperson of the Citizen Stakeholders Group (New Orleans Energy Task Force) and the Department of Energy Project Officer in February of 2008. In January 2008, the New Orleans Utility Committee requested review, commentary, and suggestions for Utility Committee next steps related to the Energy Efficiency Resolution (the Resolution) passed by the City Council in December 2007. The suggestions are reprinted here as: (1) An illustration of opportunities for other local governments for the development and implementation of effective energy efficiency ordinances and resolutions; and (2) An example of the type of policy technical assistance that DOE/NREL provides to communities. For more information on the strategy for delivering assistance, please see: www.nrel.gov/docs/fy11osti/48689.pdf. Based on experience in other communities and energy efficiency policies and programs, NREL found the Resolution to be a solid framework for increasing the responsible use of energy efficiency and reaping the associated economic and environmental benefits in the city of New Orleans. The remainder of this document provides the requested suggestions for next steps in implementing the word and spirit of the resolution. These suggestions integrate the extensive work of other entities, including the New Orleans Mayor's office, the New Orleans Energy Advisory Committee, the Energy Efficiency Initiative, and the U.S. Environmental Protection Agency's National Action Plan for Energy Efficiency. In general, three actions were suggested for funding mechanisms, two for near-term successes, and two for longer-term success.

  3. CO2-driven Enhanced Oil Recovery as a Stepping Stone to What?

    SciTech Connect

    Dooley, James J.; Dahowski, Robert T.; Davidson, Casie L.

    2010-07-14

    This paper draws heavily on the authors’ previously published research to explore the extent to which near term carbon dioxide-driven enhanced oil recovery (CO2-EOR) can be “a stepping stone to a long term sequestration program of a scale to be material in climate change risk mitigation.” The paper examines the historical evolution of CO2-EOR in the United States and concludes that estimates of the cost of CO2-EOR production or the extent of CO2 pipeline networks based upon this energy security-driven promotion of CO2-EOR do not provide a robust platform for spurring the commercial deployment of carbon dioxide capture and storage technologies (CCS) as a means of reducing greenhouse gas emissions. The paper notes that the evolving regulatory framework for CCS makes a clear distinction between CO2-EOR and CCS and the authors examine arguments in the technical literature about the ability for CO2-EOR to generate offsetting revenue to accelerate the commercial deployment of CCS systems in the electric power and industrial sectors of the economy. The authors conclude that the past 35 years of CO2-EOR in the U.S. have been important for boosting domestic oil production and delivering proven system components for future CCS systems. However, though there is no reason to suggest that CO2-EOR will cease to deliver these benefits, there is also little to suggest that CO2-EOR is a necessary or significantly beneficial step towards the commercial deployment of CCS as a means of addressing climate change.

  4. Developing and validating advanced divertor solutions on DIII-D for next-step fusion devices

    DOE PAGES [OSTI]

    Guo, H. Y.; Hill, D. N.; Leonard, A. W.; Allen, S. L.; Stangeby, P. C.; Thomas, D.; Unterberg, E. A.; Abrams, T.; Boedo, J.; Briesemeister, A. R.; et al

    2016-09-14

    A major challenge facing the design and operation of next-step high-power steady-state fusion devices is to develop a viable divertor solution with order-of-magnitude increases in power handling capability relative to present experience, while having acceptable divertor target plate erosion and being compatible with maintaining good core plasma confinement. A new initiative has been launched on DIII-D to develop the scientific basis for design, installation, and operation of an advanced divertor to evaluate boundary plasma solutions applicable to next step fusion experiments beyond ITER. Developing the scientific basis for fusion reactor divertor solutions must necessarily follow three lines of research, whichmore » we plan to pursue in DIII-D: (1) Advance scientific understanding and predictive capability through development and comparison between state-of-the art computational models and enhanced measurements using targeted parametric scans; (2) Develop and validate key divertor design concepts and codes through innovative variations in physical structure and magnetic geometry; (3) Assess candidate materials, determining the implications for core plasma operation and control, and develop mitigation techniques for any deleterious effects, incorporating development of plasma-material interaction models. These efforts will lead to design, installation, and evaluation of an advanced divertor for DIII-D to enable highly dissipative divertor operation at core density (n e/n GW), neutral fueling and impurity influx most compatible with high performance plasma scenarios and reactor relevant plasma facing components (PFCs). In conclusion, this paper highlights the current progress and near-term strategies of boundary/PMI research on DIII-D.« less

  5. Surface Modified Particles By Multi-Step Michael-Type Addition And Process For The Preparation Thereof

    DOEpatents

    Cook, Ronald Lee; Elliott, Brian John; Luebben, Silvia DeVito; Myers, Andrew William; Smith, Bryan Matthew

    2005-05-03

    A new class of surface modified particles and a multi-step Michael-type addition surface modification process for the preparation of the same is provided. The multi-step Michael-type addition surface modification process involves two or more reactions to compatibilize particles with various host systems and/or to provide the particles with particular chemical reactivities. The initial step comprises the attachment of a small organic compound to the surface of the inorganic particle. The subsequent steps attach additional compounds to the previously attached organic compounds through reactive organic linking groups. Specifically, these reactive groups are activated carbon—carbon pi bonds and carbon and non-carbon nucleophiles that react via Michael or Michael-type additions.

  6. Surface Modified Particles By Multi-Step Michael-Type Addition And Process For The Preparation Thereof

    DOEpatents

    Cook, Ronald Lee (Lakewood, CO); Elliott, Brian John (Superior, CO); Luebben, Silvia DeVito (Golden, CO); Myers, Andrew William (Arvada, CO); Smith, Bryan Matthew (Boulder, CO)

    2005-05-03

    A new class of surface modified particles and a multi-step Michael-type addition surface modification process for the preparation of the same is provided. The multi-step Michael-type addition surface modification process involves two or more reactions to compatibilize particles with various host systems and/or to provide the particles with particular chemical reactivities. The initial step comprises the attachment of a small organic compound to the surface of the inorganic particle. The subsequent steps attach additional compounds to the previously attached organic compounds through reactive organic linking groups. Specifically, these reactive groups are activated carboncarbon pi bonds and carbon and non-carbon nucleophiles that react via Michael or Michael-type additions.

  7. Adaptive step-size algorithm for Fourier beam-propagation method with absorbing boundary layer of auto-determined width

    DOE PAGES [OSTI]

    Learn, R.; Feigenbaum, E.

    2016-05-27

    Two algorithms that enhance the utility of the absorbing boundary layer are presented, mainly in the framework of the Fourier beam-propagation method. One is an automated boundary layer width selector that chooses a near-optimal boundary size based on the initial beam shape. Furthermore, the second algorithm adjusts the propagation step sizes based on the beam shape at the beginning of each step in order to reduce aliasing artifacts.

  8. STEPS TO ESTABLISH A REAL-TIME TRANSMISSION MONITORING SYSTEM FOR TRANSMISSION OWNERS AND OPERATORS WITHIN THE

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    STEPS TO ESTABLISH A REAL-TIME TRANSMISSION MONITORING SYSTEM FOR TRANSMISSION OWNERS AND OPERATORS WITHIN THE EASTERN AND WESTERN INTERCONNECTIONS A REPORT TO CONGRESS PURSUANT TO SECTION 1839 OF THE ENERGY POLICY ACT OF 2005 Prepared by United States Department of Energy & Federal Energy Regulatory Commission February 3, 2006 Report to Congress Joint Report by the Department of Energy and Federal Energy Regulatory Commission on Steps to Establish a Real-Time Transmission Monitoring System

  9. CO Oxidation at the Interface of Au Nanoclusters and the Stepped-CeO2(111) Surface

    SciTech Connect

    Kim H. Y.; Henkelman, G.

    2013-01-14

    To reveal the richer chemistry of CO oxidation by CeO2 supported Au Nanoclusters NCs)/Nanoparticles, we design a Au12 supported on a stepped-CeO2 model (Au/CeO2-step) and study various kinds of CO oxidation mechanisms at the interface of the Au/CeO2-step: oxygen spillover from the CeO2 to the Au NCs;2 CO oxidation by the O2 bound to the Au-Ce3+ interface;3 and CO oxidation by the Mars-van Krevelen (M-vK) mechanism.4 DFT+U calculations show that lattice oxygen at the CeO2 step edge oxidizes CO bound to Au NCs by the M-vK mechanism. CO2 desorption determines the rate of CO oxidation and the vacancy formation energy (Evac) is a reactivity descriptor for CO oxidation. The maximum Evac that insures spontaneous CO2 production is higher for the Au/CeO2-step than the Au/CeO2-surface suggesting that the CeO2-step is a better supporting material than the CeO2-surface for CO oxidation by the Au/CeO2. Our results also suggest that for CO oxidation by Au NCs supported on nano- or meso-structured CeO2, which is the case of industrial catalysts, the M-vK mechanism accounts for a large portion of the total activity.

  10. Microstructure investigation of 13Cr-2Mo ODS steel components obtained by high voltage electric discharge compaction technique

    SciTech Connect

    Bogachev, Igor; Yudin, Artem; Grigoryev, Evgeniy; Chernov, Ivan; Staltsov, Maxim; Khasanov, Oleg; Olevsky, Eugene

    2015-11-02

    Refractory oxide dispersion strengthened 13Cr-2Mo steel powder was successfully consolidated to near theoretical density using high voltage electric discharge compaction. Cylindrical samples with relative density from 90% to 97% and dimensions of 10 mm in diameter and 10–15 mm in height were obtained. Consolidation conditions such as pressure and voltage were varied in some ranges to determine the optimal compaction regime. Three different concentrations of yttria were used to identify its effect on the properties of the samples. It is shown that the utilized ultra-rapid consolidation process in combination with high transmitted energy allows obtaining high density compacts, retaining the initial structure with minimal grain growth. The experimental results indicate some heterogeneity of the structure which may occur in the external layers of the tested samples due to various thermal and electromagnetic in-processing effects. As a result, the choice of the optimal parameters of the consolidation enables obtaining samples of acceptable quality.

  11. Method and apparatus for obtaining stack traceback data for multiple computing nodes of a massively parallel computer system

    DOEpatents

    Gooding, Thomas Michael; McCarthy, Patrick Joseph

    2010-03-02

    A data collector for a massively parallel computer system obtains call-return stack traceback data for multiple nodes by retrieving partial call-return stack traceback data from each node, grouping the nodes in subsets according to the partial traceback data, and obtaining further call-return stack traceback data from a representative node or nodes of each subset. Preferably, the partial data is a respective instruction address from each node, nodes having identical instruction address being grouped together in the same subset. Preferably, a single node of each subset is chosen and full stack traceback data is retrieved from the call-return stack within the chosen node.

  12. Studies on design of a process for organo-refining of coal to obtain super clean coal

    SciTech Connect

    Sharma, C.S.; Sharma, D.K.

    1999-08-01

    Organo-refining of coal results in refining the coal to obtain super clean coal and residual coal. Super clean coal may be used to obtain value added chemicals, products, and cleaner fuels from coal. In the present work, studies on the design of a semicontinuous process for organo-refining of one ton of coal have been made. The results are reported. This is only a cursory attempt for the design, and further studies may be required for designing this process for use in the development of a scaled-up process of organo-refining of coal.

  13. Compositional study of vacuum annealed Al doped ZnO thin films obtained by RF magnetron sputtering

    SciTech Connect

    Shantheyanda, B. P.; Todi, V. O.; Sundaram, K. B.; Vijayakumar, A.; Oladeji, I.

    2011-09-15

    Aluminum doped zinc oxide (AZO) thin films were obtained by RF magnetron sputtering. The effects of deposition parameters such as power, gas flow conditions, and substrate heating have been studied. Deposited and annealed films were characterized for composition as well as microstructure using x ray photoelectron spectroscopy and x ray diffraction. Films produced were polycrystalline in nature. Surface imaging and roughness studies were carried out using SEM and AFM, respectively. Columnar grain growth was predominantly observed. Optical and electrical properties were evaluated for transparent conducting oxide applications. Processing conditions were optimized to obtain highly transparent AZO films with a low resistivity value of 6.67 x 10{sup -4}{Omega} cm.

  14. Evaluation of delivered monitor unit accuracy of gated step-and-shoot IMRT using a two-dimensional detector array

    SciTech Connect

    Cheong, Kwang-Ho; Kang, Sei-Kwon; Lee, MeYeon; Kim, Su SSan; Park, SoAh; Hwang, Tae-Jin; Kim, Kyoung Ju; Oh, Do Hoon; Bae, Hoonsik; Suh, Tae-Suk

    2010-03-15

    Purpose: To overcome the problem of organ motion in intensity-modulated radiation therapy (IMRT), gated IMRT is often used for the treatment of lung cancer. In this study, the authors investigated the accuracy of the delivered monitor units (MUs) from each segment during gated IMRT using a two-dimensional detector array for user-specific verification purpose. Methods: The authors planned a 6 MV photon, seven-port step-and-shoot lung IMRT delivery. The respiration signals for gated IMRT delivery were obtained from the one-dimensional moving phantom using the real-time position management (RPM) system (Varian Medical Systems, Palo Alto, CA). The beams were delivered using a Clinac iX (Varian Medical Systems, Palo Alto, CA) with the Millennium 120 MLC. The MatriXX (IBA Dosimetry GmbH, Germany) was validated through consistency and reproducibility tests as well as comparison with measurements from a Farmer-type ion chamber. The authors delivered beams with varying dose rates and duty cycles and analyzed the MatriXX data to evaluate MU delivery accuracy. Results: There was quite good agreement between the planned segment MUs and the MUs computed from the MatriXX within {+-}2% error. The beam-on times computed from the MatriXX data were almost identical for all cases, and they matched well with the RPM beam-on and beam-off signals. A slight difference was observed between them, but it was less than 40 ms. The gated IMRT delivery demonstrated an MU delivery accuracy that was equivalent to ungated IMRT, and the delivered MUs with a gating signal agreed with the planned MUs within {+-}0.5 MU regardless of dose rate and duty cycle. Conclusions: The authors can conclude that gated IMRT is able to deliver an accurate dose to a patient during a procedure. The authors believe that the methodology and results can be transferred to other vendors' devices, particularly those that do not provide MLC log data for a verification purpose.

  15. FutureGen: Stepping-Stone to Sustainable Fossil-Fuel Power Generation

    SciTech Connect

    Zitney, S.E.

    2006-11-01

    This presentation will highlight the U.S. Department of Energy's FutureGen Initiative. The nearly $1 billion government-industry project is a stepping-stone toward future coal-fired power plants that will produce hydrogen and electricity with zero-emissions, including carbon dioxide. The 275-megawatt FutureGen plant will initiate operations around 2012 and employ advanced coal gasification technology integrated with combined cycle electricity generation, hydrogen production, and carbon capture and sequestration. The initiative is a response to a presidential directive to develop a hydrogen economy by drawing upon the best scientific research to address the issue of global climate change. The FutureGen plant will be based on cutting-edge power generation technology as well as advanced carbon capture and sequestration systems. The centerpiece of the project will be coal gasification technology that can eliminate common air pollutants such as sulfur dioxide and nitrogen oxides and convert them to useable by-products. Gasification will convert coal into a highly enriched hydrogen gas, which can be burned much more cleanly than directly burning the coal itself. Alternatively, the hydrogen can be used in a fuel cell to produce ultra-clean electricity, or fed to a refinery to help upgrade petroleum products. Carbon sequestration will also be a key feature that will set the Futuregen plant apart from other electric power plant projects. The initial goal will be to capture 90 percent of the plant's carbon dioxide, but capture of nearly 100 percent may be possible with advanced technologies. Once captured, the carbon dioxide will be injected as a compressed fluid deep underground, perhaps into saline reservoirs. It could even be injected into oil or gas reservoirs, or into unmineable coal seams, to enhance petroleum or coalbed methane recovery. The ultimate goal for the FutureGen plant is to show how new technology can eliminate environmental concerns over the future use of

  16. Validation Testing of the Nitric Acid Dissolution Step Within the K Basin Sludge Pretreatment Process

    SciTech Connect

    AJ Schmidt; CH Delegard; KL Silvers; PR Bredt; CD Carlson; EW Hoppe; JC Hayes; DE Rinehart; SR Gano; BM Thornton

    1999-03-24

    The work described in this report involved comprehensive bench-scale testing of nitric acid (HNO{sub 3}) dissolution of actual sludge materials from the Hanford K East (KE) Basin to confirm the baseline chemical pretreatment process. In addition, process monitoring and material balance information was collected to support the development and refinement of process flow diagrams. The testing was performed by Pacific Northwest National Laboratory (PNNL)for the US Department of Energy's Office of Spent Fuel Stabilization (EM-67) and Numatec Hanford Corporation (NHC) to assist in the development of the K Basin Sludge Pretreatment Process. The baseline chemical pretreatment process for K Basin sludge is nitric acid dissolution of all particulate material passing a 1/4-in. screen. The acid-insoluble fraction (residual solids) will be stabilized (possibly by chemical leaching/rinsing and grouting), packaged, and transferred to the Hanford Environmental Restoration Disposal Facility (ERDF). The liquid fraction is to be diluted with depleted uranium for uranium criticality safety and iron nitrate for plutonium criticality safety, and neutralized with sodium hydroxide. The liquid fraction and associated precipitates are to be stored in the Hanford Tank Waste Remediation Systems (TWRS) pending vitrification. It is expected that most of the polychlorinated biphenyls (PCBs), associated with some K Basin sludges, will remain with the residual solids for ultimate disposal to ERDF. Filtration and precipitation during the neutralization step will further remove trace quantities of PCBs within the liquid fraction. The purpose of the work discussed in this report was to examine the dissolution behavior of actual KE Basin sludge materials at baseline flowsheet conditions and validate the.dissolution process step through bench-scale testing. The progress of the dissolution was evaluated by measuring the solution electrical conductivity and concentrations of key species in the dissolver

  17. Century-Midas steps slowly into the RV (recreational vehicles) LPG conversion market

    SciTech Connect

    Kincaid, J.

    1980-02-01

    Midas International will obtain LPG carburetion equipment from Century for installation in up to 20,000 RV. The market for gasoline-powered RV has been depressed since the surge in gasoline prices, and the installation of Century's equipment represents an attempt to attract customers by reducing RV operating costs. According to J. Kincaid (Midas Inst.), propane, besides being cheaper than gasoline, is also cheaper than diesel fuel, despite the better mileage obtained with diesel fuel, because the use of diesel fuel requires the installation of a diesel engine, which is far more expensive than installation of LPG carburetion. Although most of the LPG carburetion manufacturers, with a backlog of orders, did not evince interest in Midas' search for conversion equipment for RV, Century responded, at least partly because Midas also manufactures fleet delivery trucks, which represent a potentially much larger market for LPG conversion and use.

  18. Improving the actinides recycling in closed fuel cycles, a major step towards nuclear energy sustainability

    SciTech Connect

    Poinssot, C.; Grandjean, S.; Masson, M.; Bouillis, B.; Warin, D.

    2013-07-01

    Increasing the sustainability of nuclear energy is a longstanding road that requires a stepwise approach to successively tackle the following 3 objectives. First of all, optimize the consumption of natural resource to preserve them for future generations and hence guarantee the energetic independence of the countries (no uranium ore is needed anymore). The current twice-through cycle of Pu implemented by France, UK, Japan and soon China is a first step in this direction and already allows the development and optimization of the relevant industrial processes. It also allows a major improvement regarding the conditioning of the ultimate waste in a durable and robust nuclear glass. Secondly, the recycling of americium could be an interesting option for the future with the deployment of FR fleet to save the repository resource and optimize its use by allowing a denser disposal. It would limit the burden towards the future generations and the need for additional repositories before several centuries. Thirdly, the recycling of the whole minor actinides inventory could be an interesting option for the far-future for strongly decreasing the waste long-term toxicity, down to a few centuries. It would bring the waste issue back within the human history, which should promote its acceptance by the social opinion.

  19. Stepped-frequency continuous-wave microwave-induced thermoacoustic imaging

    SciTech Connect

    Nan, Hao Arbabian, Amin

    2014-06-02

    Microwave-induced thermoacoustic (TA) imaging combines the dielectric contrast of microwave imaging with the resolution of ultrasound imaging. Prior studies have only focused on time-domain techniques with short but powerful microwave pulses that require a peak output power in excess of several kilowatts to achieve sufficient signal-to-noise ratio (SNR). This poses safety concerns as well as to render the imager expensive and bulky with requiring a large vacuum radio frequency source. Here, we propose and demonstrate a coherent stepped-frequency continuous-wave (SFCW) technique for TA imaging which enables substantial improvements in SNR and consequently a reduction in peak power requirements for the imager. Constructive and destructive interferences between TA signals are observed and explained. Full coherency across microwave and acoustic domains, in the thermo-elastic response, is experimentally verified and this enables demonstration of coherent SFCW microwave-induced TA imaging. Compared to the pulsed technique, an improvement of 17 dB in SNR is demonstrated.

  20. Source-term experiment STEP-3 simulating a PWR severe station blackout

    SciTech Connect

    Simms, R.; Baker, L. Jr.; Ritzman, R.L.

    1987-01-01

    For a severe pressurized water reactor accident that leads to a loss of feedwater to the stream generators, such as might occur in a station blackout, fission product decay heating causes a water boil-off. Without effective decay heat removal, the fuel elements will be uncovered. Eventually, steam will oxidize the overheated cladding. The noble gases and volatile fission products, such as cesium and iodine, that are major contributors to the radiological source term will be released from the damaged fuel shortly after cladding failure. The accident environment when these volatile fission products escape was simulated in STEP-3 using four fuel elements from the Belgonucleaire BR3 reactor. The primary objective was to examine the releases in samples collected as close to the test zone as possible. In this paper, an analysis of the temperatures and hydrogen generation is compared with the measurements. The analysis is needed to estimate releases and characterize conditions at the source for studies of fission product transport.

  1. TREAT source-term experiment STEP-1 simulating a PWR LOCA

    SciTech Connect

    Simms, R.; Baker, L. Jr.; Blomquist, C.A.; Ritzman, R.L.

    1986-01-01

    In a hypothetical pressurized water reactor (PWR) large-break loss-of-coolant accident (LOCA) in which the emergency core cooling system fails, fission product decay heating causes water boil-off and reduced heat removal. Zircaloy cladding is oxidized by the steam. The noble gases and volatile fission products such as cesium and iodine that constitute a principal part of the source term will be released from the damaged fuel at or shortly after the time of cladding failure. TREAT test STEP-1 simulated the LOCA environment when the volatile fission products would be released using four fuel elements from the Belgonucleaire BR3 reactor. The principal objective was to collect a portion of the releases carried by the flow stream in a region as close as possible to the test zone. In this paper, the test is described and the results of an analysis of the thermal and steam/hydrogen environment are compared with the test measurements in order to provide a characterization for analysis of fission product releases and aerosol formation. The results of extensive sample examinations are reported separately.

  2. Shutdown Dose Rate Analysis Using the Multi-Step CADIS Method

    SciTech Connect

    Ibrahim, Ahmad M.; Peplow, Douglas E.; Peterson, Joshua L.; Grove, Robert E.

    2015-01-01

    The Multi-Step Consistent Adjoint Driven Importance Sampling (MS-CADIS) hybrid Monte Carlo (MC)/deterministic radiation transport method was proposed to speed up the shutdown dose rate (SDDR) neutron MC calculation using an importance function that represents the neutron importance to the final SDDR. This work applied the MS-CADIS method to the ITER SDDR benchmark problem. The MS-CADIS method was also used to calculate the SDDR uncertainty resulting from uncertainties in the MC neutron calculation and to determine the degree of undersampling in SDDR calculations because of the limited ability of the MC method to tally detailed spatial and energy distributions. The analysis that used the ITER benchmark problem compared the efficiency of the MS-CADIS method to the traditional approach of using global MC variance reduction techniques for speeding up SDDR neutron MC calculation. Compared to the standard Forward-Weighted-CADIS (FW-CADIS) method, the MS-CADIS method increased the efficiency of the SDDR neutron MC calculation by 69%. The MS-CADIS method also increased the fraction of nonzero scoring mesh tally elements in the space-energy regions of high importance to the final SDDR.

  3. Single-step gas phase synthesis of stable iron aluminide nanoparticles with soft magnetic properties

    SciTech Connect

    Vernieres, Jerome Benelmekki, Maria; Kim, Jeong-Hwan; Grammatikopoulos, Panagiotis; Diaz, Rosa E.; Bobo, Jean-François; Sowwan, Mukhles

    2014-11-01

    Soft magnetic alloys at the nanoscale level have long generated a vivid interest as candidate materials for technological and biomedical purposes. Consequently, controlling the structure of bimetallic nanoparticles in order to optimize their magnetic properties, such as high magnetization and low coercivity, can significantly boost their potential for related applications. However, traditional synthesis methods stumble upon the long standing challenge of developing true nanoalloys with effective control over morphology and stability against oxidation. Herein, we report on a single-step approach to the gas phase synthesis of soft magnetic bimetallic iron aluminide nanoparticles, using a versatile co-sputter inert gas condensation technique. This method allowed for precise morphological control of the particles; they consisted of an alloy iron aluminide crystalline core (DO{sub 3} phase) and an alumina shell, which reduced inter-particle interactions and also prevented further oxidation and segregation of the bimetallic core. Remarkably, the as-deposited alloy nanoparticles show interesting soft magnetic properties, in that they combine a high saturation magnetization (170 emu/g) and low coercivity (less than 20 Oe) at room temperature. Additional functionality is tenable by modifying the surface of the particles with a polymer, to ensure their good colloidal dispersion in aqueous environments.

  4. SHARP, a first step towards a full sized Jules Verne Launcher

    SciTech Connect

    Bertolini, L.R.; Hunter, J.W.; Powell, J.R.; Tidman, D.A.

    1993-05-01

    A vital element for space exploration and utilization is the ability to affordably place large quantities of consumables and building material into low earth orbit. Calculations and supportive data indicate this can be done with a large hydrogen gas gun referred to as the Jules Verne Launcher (JVL). We present a design for the JVL based upon the concept of side injecting preheated hydrogen along a long barrel. This dramatically reduces the peak pressures in the launcher as well as the pressures and g-loads at the vehicle. The JVL has the promise of reducing payload delivery costs to Low Earth Orbit (LEO) to below $500/kg. The Super High Altitude Research Project (SHARP) is a conventional two-stage hydrogen gas gun which is configured to launch 5 kg packages on suborbital trajectories. It is the first step towards the much larger Jules Verne system and will demonstrate several important features of the larger system. SHARP is currently in the middle of a series of tests aimed at its first milestone. This is to launch 5 kg at 4 km/sec horizontally. In its inclined configuration SHARP should launch vehicles to apogees in excess of 400 km and ranges in excess of 700 km.

  5. Elementary Steps of Syngas Reactions on Mo2C(001): Adsorption Thermochemistry and Bond Dissociation

    SciTech Connect

    Medford, Andrew

    2012-02-16

    Density functional theory (DFT) and ab initio thermodynamics are applied in order to investigate the most stable surface and subsurface terminations of Mo{sub 2}C(001) as a function of chemical potential and in the presence of syngas. The Mo-terminated (001) surface is then used as a model surface to evaluate the thermochemistry and energetic barriers for key elementary steps in syngas reactions. Adsorption energy scaling relations and Broensted-Evans-Polanyi relationships are established and used to place Mo{sub 2}C into the context of transition metal surfaces. The results indicate that the surface termination is a complex function of reaction conditions and kinetics. It is predicted that the surface will be covered by either C{sub 2}H{sub 2} or O depending on conditions. Comparisons to transition metals indicate that the Mo-terminated Mo{sub 2}C(001) surface exhibits carbon reactivity similar to transition metals such as Ru and Ir, but is significantly more reactive towards oxygen.

  6. Shutdown Dose Rate Analysis Using the Multi-Step CADIS Method

    DOE PAGES [OSTI]

    Ibrahim, Ahmad M.; Peplow, Douglas E.; Peterson, Joshua L.; Grove, Robert E.

    2015-01-01

    The Multi-Step Consistent Adjoint Driven Importance Sampling (MS-CADIS) hybrid Monte Carlo (MC)/deterministic radiation transport method was proposed to speed up the shutdown dose rate (SDDR) neutron MC calculation using an importance function that represents the neutron importance to the final SDDR. This work applied the MS-CADIS method to the ITER SDDR benchmark problem. The MS-CADIS method was also used to calculate the SDDR uncertainty resulting from uncertainties in the MC neutron calculation and to determine the degree of undersampling in SDDR calculations because of the limited ability of the MC method to tally detailed spatial and energy distributions. The analysismore » that used the ITER benchmark problem compared the efficiency of the MS-CADIS method to the traditional approach of using global MC variance reduction techniques for speeding up SDDR neutron MC calculation. Compared to the standard Forward-Weighted-CADIS (FW-CADIS) method, the MS-CADIS method increased the efficiency of the SDDR neutron MC calculation by 69%. The MS-CADIS method also increased the fraction of nonzero scoring mesh tally elements in the space-energy regions of high importance to the final SDDR.« less

  7. Closed loop adaptive control of spectrum-producing step using neural networks

    DOEpatents

    Fu, C.Y.

    1998-11-24

    Characteristics of the plasma in a plasma-based manufacturing process step are monitored directly and in real time by observing the spectrum which it produces. An artificial neural network analyzes the plasma spectrum and generates control signals to control one or more of the process input parameters in response to any deviation of the spectrum beyond a narrow range. In an embodiment, a plasma reaction chamber forms a plasma in response to input parameters such as gas flow, pressure and power. The chamber includes a window through which the electromagnetic spectrum produced by a plasma in the chamber, just above the subject surface, may be viewed. The spectrum is conducted to an optical spectrometer which measures the intensity of the incoming optical spectrum at different wavelengths. The output of optical spectrometer is provided to an analyzer which produces a plurality of error signals, each indicating whether a respective one of the input parameters to the chamber is to be increased or decreased. The microcontroller provides signals to control respective controls, but these lines are intercepted and first added to the error signals, before being provided to the controls for the chamber. The analyzer can include a neural network and an optional spectrum preprocessor to reduce background noise, as well as a comparator which compares the parameter values predicted by the neural network with a set of desired values provided by the microcontroller. 7 figs.

  8. Closed loop adaptive control of spectrum-producing step using neural networks

    DOEpatents

    Fu, Chi Yung

    1998-01-01

    Characteristics of the plasma in a plasma-based manufacturing process step are monitored directly and in real time by observing the spectrum which it produces. An artificial neural network analyzes the plasma spectrum and generates control signals to control one or more of the process input parameters in response to any deviation of the spectrum beyond a narrow range. In an embodiment, a plasma reaction chamber forms a plasma in response to input parameters such as gas flow, pressure and power. The chamber includes a window through which the electromagnetic spectrum produced by a plasma in the chamber, just above the subject surface, may be viewed. The spectrum is conducted to an optical spectrometer which measures the intensity of the incoming optical spectrum at different wavelengths. The output of optical spectrometer is provided to an analyzer which produces a plurality of error signals, each indicating whether a respective one of the input parameters to the chamber is to be increased or decreased. The microcontroller provides signals to control respective controls, but these lines are intercepted and first added to the error signals, before being provided to the controls for the chamber. The analyzer can include a neural network and an optional spectrum preprocessor to reduce background noise, as well as a comparator which compares the parameter values predicted by the neural network with a set of desired values provided by the microcontroller.

  9. A new continuous two-step molecular precursor route to rare-earth oxysulfides Ln{sub 2}O{sub 2}S

    SciTech Connect

    De Crom, N.

    2012-07-15

    A continuous two-step molecular precursor pathway is designed for the preparation of rare-earth oxysulfides Ln{sub 2}O{sub 2}S (Ln=Y, La, Pr, Nd, Sm-Lu). This new route involves a first oxidation step leading to the rare-earth oxysulfate Ln{sub 2}O{sub 2}SO{sub 4} which is subsequently reduced to the rare-earth oxysulfide Ln{sub 2}O{sub 2}S by switching to a H{sub 2}-Ar atmosphere. The whole process occurs at a temperature significantly lower than usual solid state synthesis (T{<=}650 Degree-Sign C) and avoids the use of dangerous sulfur-based gases, providing a convenient route to the synthesis of the entire series of Ln{sub 2}O{sub 2}S. The molecular precursors consist in heteroleptic dithiocarbamate complexes [Ln(Et{sub 2}dtc){sub 3}(phen)] and [Ln(Et{sub 2}dtc){sub 3}(bipy)] (Et{sub 2}dtc=N,N-diethyldithiocarbamate; phen=1,10-phenanthroline; bipy=2,2 Prime -bipyridine) and were synthesized by a new high yield and high purity synthesis route. The nature of the molecular precursor determines the minimum synthesis temperature and influences therefore the purity of the final Ln{sub 2}O{sub 2}S crystalline phase. - Graphical abstract: A continuous two-step molecular precursor pathway was designed for the preparation of rare-earth oxysulfides Ln{sub 2}O{sub 2}S (Ln=Y, La, Pr, Nd, Sm-Lu), starting from heteroleptic dithiocarbamate complexes. The influence of the nature of the molecular precursor on the minimum synthesis temperature and on the purity of the final Ln{sub 2}O{sub 2}S crystalline phase is discussed. Highlights: Black-Right-Pointing-Pointer A new high yield and high purity synthesis route of rare earth dithiocarbamates is described. Black-Right-Pointing-Pointer These compounds are used as precursors in a continuous process leading to rare-earth oxysulfides. Black-Right-Pointing-Pointer The oxysulfides are obtained under much more moderate conditions than previously described.

  10. Development of the laser isotope separation method (AVLIS) for obtaining weight amounts of highly enriched {sup 150}Nd isotope

    SciTech Connect

    Babichev, A P; Grigoriev, Igor' S; Grigoriev, A I; Dorovskii, A P; D'yachkov, Aleksei B; Kovalevich, S K; Kochetov, V A; Kuznetsov, V A; Labozin, Valerii P; Matrakhov, A V; Mironov, Sergei M; Nikulin, Sergei A; Pesnya, A V; Timofeev, N I; Firsov, Valerii A; Tsvetkov, G O; Shatalova, G G

    2005-10-31

    Results obtained at the first stage of development of the experimental technique for obtaining weight amounts of the highly enriched {sup 150}Nd isotope by laser photoionisation are presented. The vaporiser and the laser are designed, and various methods of irradiation of neodymium vapour and extraction of photoions are tested. The product yield {approx}40 mg h{sup -1} for the {approx}60% enrichment and 25 mg h{sup -1} for the {approx}65% enrichment is achieved for a vaporiser of length 27 cm. The cost of constructing the facility for preparing 50 kg of the {sup 150}Nd isotope, intended for determining the neutrino mass, is estimated. This estimate shows that the cost of production can be lowered by a factor of 5-7 compared to the electromagnetic method. (invited paper)

  11. Analysis of ocean current meter records obtained from a 1975 deployment off the Farallon Islands, California. Final report

    SciTech Connect

    Crabbs, D.E.

    1983-08-01

    Two bottom current records were obtained during August and September 1975 in the Farallon Islands low-level radioactive waste disposal area off San Francisco, California. This report presents the results of the data reduction and analysis of the current meter records, and interprets the results with respect to additional data collected in 1977. An effort is made to compare the patterns of current activity in the dumpsite area for the time periods measured.

  12. Optimum coil shape for a given volume of conductor to obtain maximum central field in an air core solenoid

    SciTech Connect

    Hernandez, P.

    1995-02-01

    This paper is an expansion of engineering notes prepared in 1961 to address the question of how to wind circular coils so as to obtain the maximum axial field with the minimum volume of conductor. At the time this was a germain question because of the advent of superconducting wires which were in very limited supply, and the rapid push for generation of very high fields, with little concern for uniformity.

  13. Microstructure investigation of 13Cr-2Mo ODS steel components obtained by high voltage electric discharge compaction technique

    DOE PAGES [OSTI]

    Bogachev, Igor; Yudin, Artem; Grigoryev, Evgeniy; Chernov, Ivan; Staltsov, Maxim; Khasanov, Oleg; Olevsky, Eugene

    2015-11-02

    Refractory oxide dispersion strengthened 13Cr-2Mo steel powder was successfully consolidated to near theoretical density using high voltage electric discharge compaction. Cylindrical samples with relative density from 90% to 97% and dimensions of 10 mm in diameter and 10–15 mm in height were obtained. Consolidation conditions such as pressure and voltage were varied in some ranges to determine the optimal compaction regime. Three different concentrations of yttria were used to identify its effect on the properties of the samples. It is shown that the utilized ultra-rapid consolidation process in combination with high transmitted energy allows obtaining high density compacts, retaining themore » initial structure with minimal grain growth. The experimental results indicate some heterogeneity of the structure which may occur in the external layers of the tested samples due to various thermal and electromagnetic in-processing effects. As a result, the choice of the optimal parameters of the consolidation enables obtaining samples of acceptable quality.« less

  14. SU-E-I-53: Variation in Measurements of Breast Skin Thickness Obtained Using Different Imaging Modalities

    SciTech Connect

    Nguyen, U; Kumaraswamy, N; Markey, M

    2014-06-01

    Purpose: To investigate variation in measurements of breast skin thickness obtained using different imaging modalities, including mammography, computed tomography (CT), ultrasound, and magnetic resonance imaging (MRI). Methods: Breast skin thicknesses as measured by mammography, CT, ultrasound, and MRI were compared. Mammographic measurements of skin thickness were obtained from published studies that utilized standard positioning (upright) and compression. CT measurements of skin thickness were obtained from a published study of a prototype breast CT scanner in which the women were in the prone position and the breast was uncompressed. Dermatological ultrasound exams of the breast skin were conducted at our institution, with the subjects in the upright position and the breast uncompressed. Breast skin thickness was calculated from breast MRI exams at our institution, with the patient in the prone position and the breast uncompressed. Results: T tests for independent samples demonstrated significant differences in the mean breast skin thickness as measured by different imaging modalities. Repeated measures ANOVA revealed significant differences in breast skin thickness across different quadrants of the breast for some modalities. Conclusion: The measurement of breast skin thickness is significantly different across different imaging modalities. Differences in the amount of compression and differences in patient positioning are possible reasons why measurements of breast skin thickness vary by modality.

  15. Validation and Comparison of Carbon Sequestration Project Cost Models with Project Cost Data Obtained from the Southwest Partnership

    SciTech Connect

    Robert Lee; Reid Grigg; Brian McPherson

    2011-04-15

    Obtaining formal quotes and engineering conceptual designs for carbon dioxide (CO{sub 2}) sequestration sites and facilities is costly and time-consuming. Frequently, when looking at potential locations, managers, engineers and scientists are confronted with multiple options, but do not have the expertise or the information required to quickly obtain a general estimate of what the costs will be without employing an engineering firm. Several models for carbon compression, transport and/or injection have been published that are designed to aid in determining the cost of sequestration projects. A number of these models are used in this study, including models by J. Ogden, MIT's Carbon Capture and Sequestration Technologies Program Model, the Environmental Protection Agency and others. This report uses the information and data available from several projects either completed, in progress, or conceptualized by the Southwest Regional Carbon Sequestration Partnership on Carbon Sequestration (SWP) to determine the best approach to estimate a project's cost. The data presented highlights calculated versus actual costs. This data is compared to the results obtained by applying several models for each of the individual projects with actual cost. It also offers methods to systematically apply the models to future projects of a similar scale. Last, the cost risks associated with a project of this scope are discussed, along with ways that have been and could be used to mitigate these risks.

  16. GLOBAL MONITORING OF URANIUM HEXIFLORIDE CYLINDERS NEXT STEPS IN DEVELOPMENT OF AN ACTION PLAN

    SciTech Connect

    Hanks, D.

    2010-06-09

    Over 40 industrial facilities world-wide use standardized uranium hexafluoride (UF{sub 6}) cylinders for transport, storage and in-process receiving in support of uranium conversion, enrichment and fuel fabrication processes. UF{sub 6} is processed and stored in the cylinders, with over 50,000 tU of UF{sub 6} transported each year in these International Organization for Standardization (ISO) qualified containers. Although each cylinder is manufactured to an ISO standard that calls for a nameplate with the manufacturer's identification number (ID) and the owner's serial number engraved on it, these can be quite small and difficult to read. Recognizing that each facility seems to use a different ID, a cylinder can have several different numbers recorded on it by means of metal plates, sticky labels, paint or even marker pen as it travels among facilities around the world. The idea of monitoring movements of UF{sub 6} cylinders throughout the global uranium fuel cycle has become a significant issue among industrial and safeguarding stakeholders. Global monitoring would provide the locations, movements, and uses of cylinders in commercial nuclear transport around the world, improving the efficiency of industrial operations while increasing the assurance that growing nuclear commerce does not result in the loss or misuse of cylinders. It should be noted that a unique ID (UID) attached to a cylinder in a verifiable manner is necessary for safeguarding needs and ensuring positive ID, but not sufficient for an effective global monitoring system. Modern technologies for tracking and inventory control can pair the UID with sensors and secure data storage for content information and complete continuity of knowledge over the cylinder. This paper will describe how the next steps in development of an action plan for employing a global UF{sub 6} cylinder monitoring network could be cultivated using four primary UID functions - identification, tracking, controlling, and accounting.

  17. A two-step chemical scheme for kerosene-air premixed flames

    SciTech Connect

    Franzelli, B.; Riber, E.; Sanjose, M.; Poinsot, T.

    2010-07-15

    A reduced two-step scheme (called 2S-KERO-BFER) for kerosene-air premixed flames is presented in the context of Large Eddy Simulation of reacting turbulent flows in industrial applications. The chemical mechanism is composed of two reactions corresponding to the fuel oxidation into CO and H{sub 2}O, and the CO - CO{sub 2} equilibrium. To ensure the validity of the scheme for rich combustion, the pre-exponential constants of the two reactions are tabulated versus the local equivalence ratio. The fuel and oxidizer exponents are chosen to guarantee the correct dependence of laminar flame speed with pressure. Due to a lack of experimental results, the detailed mechanism of Dagaut composed of 209 species and 1673 reactions, and the skeletal mechanism of Luche composed of 91 species and 991 reactions have been used to validate the reduced scheme. Computations of one-dimensional laminar flames have been performed with the 2S{sub K}ERO{sub B}FER scheme using the CANTERA and COSILAB softwares for a wide range of pressure ([1; 12] atm), fresh gas temperature ([300; 700] K), and equivalence ratio ([0.6; 2.0]). Results show that the flame speed is correctly predicted for the whole range of parameters, showing a maximum for stoichiometric flames, a decrease for rich combustion and a satisfactory pressure dependence. The burnt gas temperature and the dilution by Exhaust Gas Recirculation are also well reproduced. Moreover, the results for ignition delay time are in good agreement with the experiments. (author)

  18. The need for health impact assessment in China: Potential benefits for public health and steps forward

    SciTech Connect

    Wu Liming; Rutherford, Shannon; Chu, Cordia

    2011-07-15

    Health impact assessment (HIA) is a useful tool to predict and estimate the potential health impact associated with programs, projects, and policies by comprehensively identifying relevant health determinants and their consequences. China is undergoing massive and rapid socio-economic changes leading to environment and population health challenges such as a large increase in non-communicable diseases, the emergence and re-emergence of infectious diseases, new health risks associated with environmental pollutants and escalating health inequality. These health issues are affected by multiple determinants which can be influenced by planned policies, programs, and projects. This paper discusses the needs for health impact assessment in China in order to minimize the negative health consequences from projects, programs and policies associated with rapid social and economic development. It first describes the scope of China's current impact assessment system and points out its inadequacy in meeting the requirements of population health protection and promotion. It then analyses the potential use of HIA and why China needs to develop and apply HIA as a tool to identify potential health impacts of proposed programs, projects and policies so as to influence decision-making early in the planning process. Thus, the paper recommends the development of HIA as a useful tool in China to enhance decision-making for the protection and promotion of population health. For this to happen, the paper outlines steps necessary for the establishment and successful implementation of HIA in China: beginning with the establishment of a HIA framework, followed by workforce capacity building, methodology design, and intersectoral collaboration and stakeholder engagement.

  19. Two-Step Nucleation and Growth of InP Quantum Dots via Magic-Sized Cluster

    Office of Scientific and Technical Information (OSTI)

    Intermediates (Journal Article) | SciTech Connect Two-Step Nucleation and Growth of InP Quantum Dots via Magic-Sized Cluster Intermediates Citation Details In-Document Search Title: Two-Step Nucleation and Growth of InP Quantum Dots via Magic-Sized Cluster Intermediates We report on the role of magic-sized clusters (MSCs) as key intermediates in the synthesis of indium phosphide quantum dots (InP QDs) from molecular precursors. These observations suggest that previous efforts to control

  20. Method and apparatus for converting and removing organosulfur and other oxidizable compounds from distillate fuels, and compositions obtained thereby

    DOEpatents

    D'Alessandro, Robert N.; Tarabocchia, John; Jones, Jerald Andrew; Bonde, Steven E.; Leininger, Stefan

    2010-10-26

    The present disclosure is directed to a multi-stage system and a process utilizing said system with the design of reducing the sulfur-content in a liquid comprising hydrocarbons and organosulfur compounds. The process comprising at least one of the following states: (1) an oxidation stage; (2) an extraction state; (3) a raffinate washing stage; (4) a raffinate polishing stage; (5) a solvent recovery stage; (6) a solvent purification stage; and (7) a hydrocarbon recovery stage. The process for removing sulfur-containing hydrocarbons from gas oil, which comprises oxidizing gas oil comprising hydrocarbons and organosulfur compounds to obtain a product gas oil.

  1. Department of Energy and FutureGen Alliance Discuss Next Steps for FutureGen 2.0 in Illinois

    Office of Energy Efficiency and Renewable Energy (EERE)

    Officials from the Department of Energy, the state of Illinois, Ameren, Babcock & Wilcox, American Air Liquide and the FutureGen Alliance discussed the next steps for the FutureGen 2.0 carbon capture and storage project in Illinois.

  2. Adaptice-step time integration package for stiff, nonstiff and multi-rate systems of ordinary differential equations (ODEs)

    Energy Science and Technology Software Center

    2014-06-01

    ARKode is part of a software family called SUNDIALS: SUite of Nonlinear and Differential/ALgebraic equation Solvers [1]. The ARKode solver library provides an adaptive-step time integration package for stiff, nonstiff and multi-rate systems of ordinary differential equations (ODEs) using Runge Kutta methods [2].

  3. Enhanced thermoelectric properties of phase-separating bismuth selenium telluride thin films via a two-step method

    SciTech Connect

    Takashiri, Masayuki Kurita, Kensuke; Hagino, Harutoshi; Miyazaki, Koji; Tanaka, Saburo

    2015-08-14

    A two-step method that combines homogeneous electron beam (EB) irradiation and thermal annealing has been developed to enhance the thermoelectric properties of nanocrystalline bismuth selenium telluride thin films. The thin films, prepared using a flash evaporation method, were treated with EB irradiation in a N{sub 2} atmosphere at room temperature and an acceleration voltage of 0.17 MeV. Thermal annealing was performed under Ar/H{sub 2} (5%) at 300 °C for 60 min. X-ray diffraction was used to determine that compositional phase separation between bismuth telluride and bismuth selenium telluride developed in the thin films exposed to higher EB doses and thermal annealing. We propose that the phase separation was induced by fluctuations in the distribution of selenium atoms after EB irradiation, followed by the migration of selenium atoms to more stable sites during thermal annealing. As a result, thin film crystallinity improved and mobility was significantly enhanced. This indicates that the phase separation resulting from the two-step method enhanced, rather than disturbed, the electron transport. Both the electrical conductivity and the Seebeck coefficient were improved following the two-step method. Consequently, the power factor of thin films that underwent the two-step method was enhanced to 20 times (from 0.96 to 21.0 μW/(cm K{sup 2}) that of the thin films treated with EB irradiation alone.

  4. Masses and proton separation energies obtained from Q{sub a} and Q{sub p} measurements.

    SciTech Connect

    Davids, C. N.; Woods, P. J.; Batchelder, J. C.; Bingham, C. R.; Blumenthal, D. J.; Brown, L. T.; Carpenter, L. F.; Henderson, D. J.; Janssens, R. V. F.; Penttila, H. T.; Seweryniak, D.

    2000-10-20

    For many nuclei beyond the proton drip line in the Z>72, N>82 region, both proton and a emission are energetically allowed. In the case of some proton emitters, there are {alpha}-decay chains emanating from both parent and daughter nuclei. This means that if the mass excess of one member of an {alpha}-decay chain is known, then the mass excesses for all members of both chains can be obtained. In addition, proton separation energies may be derived for nuclei in the {alpha}-decay chain of the proton emitter. The method of time- and space-correlations also allows the identification of isomeric states in these nuclei. As an example, a large number of mass excesses and proton separation energies for ground and metastable states have been derived from Q{sub a} and Q{sub p} values obtained from the proton emitters {sup 165,166,167}Ir, {sup 171}Au, {sup 177}Tl, and their daughters.

  5. High-resolution mass-analyzed threshold ion spectrum of Argon obtained on beamline 9.0.2.2

    SciTech Connect

    Hsu, C.W.; Lu, K.T.; Evans, M.

    1997-04-01

    The first mass analyzed threshold ion (MATI) spectrum using dc electric fields and a continuous wave light source has been obtained on End Station 2 of the Chemical Dynamics Beamline (9.0.2.2) at the Advanced Light Source. MATI provides researchers with fundamental spectroscopic information about atomic and molecular ions with the added advantage of mass analysis. The MATI technique involves the detection of ions formed by field ionization of long-lived high-n Rydberg states approaching an ionization threshold. The MATI apparatus consists of a differentially pumped supersonic molecular beam source, a photoionization region followed by a series of electrostatic lenses, a quadrupole mass spectrometer, and a Daly-type detector. The MATI technique can be used to probe the Rydberg states approaching an ionization continuum and yield information about the lifetimes of these states. In addition, MATI could be used to obtain the spectrum of a single species present in a sample mixture due to the mass selective nature of the experiment. MATI could also be used to form mass selected and state specific ions for use in ion molecule reaction experiments.

  6. Issues in measure-preserving three dimensional flow integrators: Self-adjointness, reversibility, and non-uniform time stepping

    SciTech Connect

    Finn, John M.

    2015-03-01

    Properties of integration schemes for solenoidal fields in three dimensions are studied, with a focus on integrating magnetic field lines in a plasma using adaptive time stepping. It is shown that implicit midpoint (IM) and a scheme we call three-dimensional leapfrog (LF) can do a good job (in the sense of preserving KAM tori) of integrating fields that are reversible, or (for LF) have a 'special divergence-free' property. We review the notion of a self-adjoint scheme, showing that such schemes are at least second order accurate and can always be formed by composing an arbitrary scheme with its adjoint. We also review the concept of reversibility, showing that a reversible but not exactly volume-preserving scheme can lead to a fractal invariant measure in a chaotic region, although this property may not often be observable. We also show numerical results indicating that the IM and LF schemes can fail to preserve KAM tori when the reversibility property (and the SDF property for LF) of the field is broken. We discuss extensions to measure preserving flows, the integration of magnetic field lines in a plasma and the integration of rays for several plasma waves. The main new result of this paper relates to non-uniform time stepping for volume-preserving flows. We investigate two potential schemes, both based on the general method of Ref. [11], in which the flow is integrated in split time steps, each Hamiltonian in two dimensions. The first scheme is an extension of the method of extended phase space, a well-proven method of symplectic integration with non-uniform time steps. This method is found not to work, and an explanation is given. The second method investigated is a method based on transformation to canonical variables for the two split-step Hamiltonian systems. This method, which is related to the method of non-canonical generating functions of Ref. [35], appears to work very well.

  7. Characterization and thermal behavior of PrMO{sub 3} (M = Co or Ni) ceramic materials obtained from gelatin

    SciTech Connect

    Aquino, F.M.; Melo, D.M.A.; Pimentel, P.M.; Braga, R.M.; Melo, M.A.F.; Martinelli, A.E.; Costa, A.F.

    2012-09-15

    Graphical abstract: The micrograph in figure shows sample calcined at temperature 900 °C. The sample exhibits morphology with considerable porosity and the formation of agglomerated nanometric particles. Gelatin provides the system with a large amount of organic matter, which is then removed during calcinations, favoring the appearance of pores in the material. Highlights: ► Oxides with PrNiO{sub 3} and PrCoO{sub 3} were prepared by new method synthesis. ► The gelatin, through its carboxylate groups and amine, is an efficient director. ► The obtained materials have magnetic properties and application in catalysis. ► The decomposition kinetic study of bonding groups of gelatin with metallic ions that takes part in the synthesis of PrMO{sub 3}. -- Abstract: Metal oxides with perovskite-type structure have attracted considerable interest in recent years due to their magnetic and electrical properties, as well as their catalytic activity. In this study, oxides with PrNiO{sub 3} and PrCoO{sub 3} composition were prepared by using gelatin powder as a precursor agent for its use as a catalyst. The powders obtained were calcined at 700 °C and 900 °C and characterized using the X-ray diffraction, thermal analysis (thermogravimetry and differential thermal analysis), infrared spectroscopy, temperature programed reduction and scanning electron microscopy techniques. Thermogravimetric data using the non-isothermal kinetic models of Flynn and Wall and “Model-free Kinetics” were used to determine the activation energy to study the decomposition kinetics of the ligand groups with system's metallic ions that takes part in the synthesis of PrMO{sub 3} (M = Ni or Co).

  8. Synthesis of lithium cobalt oxide by single-step soft hydrothermal method

    SciTech Connect

    Kumar Bokinala, Kiran; CNRS, Universite de Bordeaux, ICMCB, 87 Avenue du Dr. A. Schweitzer, Pessac F-33608; Universitatea Politehnica, Timisoara ; Pollet, M.; Artemenko, A.; Miclau, M.; Grozescu, I; Universitatea Politehnica, Timisoara

    2013-02-15

    Lithium cobalt double oxide LiCoO{sub 2} was synthesized at 220 Degree-Sign C by soft hydrothermal method using Co(OH){sub 2} and LiOH as precursors, LiOH/NaOH as mineralizers and H{sub 2}O{sub 2} as oxidant. The soft hydrothermal synthesis method offers the dual advantage of a much lower synthesis time and a higher purity in comparison with other synthesis methods. The compound was identified by X-ray diffraction and its purity was checked by magnetic and electron magnetic resonance measurements. The grain morphology was studied by Scanning Electron Microscopy and an exponential growth of particle size with synthesis time was observed. - Graphical abstract: Concave cuboctohedrons obtained after 60 h reaction time. Highlights: Black-Right-Pointing-Pointer An optimized soft hydrothermal method for a fast synthesis of high purity LiCoO{sub 2} compound is reported. Black-Right-Pointing-Pointer Both lamellar and cuboctahedral particles could be stabilized. Black-Right-Pointing-Pointer Secondary phases content is lower than 0.1%. Black-Right-Pointing-Pointer Close to surface defects were evidenced using EMR.

  9. Framework for Risk Analysis in Multimedia Environmental Systems: Modeling Individual Steps of a Risk Assessment Process

    SciTech Connect

    Shah, Anuj; Castleton, Karl J.; Hoopes, Bonnie L.

    2004-06-01

    The study of the release and effects of chemicals in the environment and their associated risks to humans is central to public and private decision making. FRAMES 1.X, Framework for Risk Analysis in Multimedia Environmental Systems, is a systems modeling software platform, developed by PNNL, Pacific Northwest National Laboratory, that helps scientists study the release and effects of chemicals on a source to outcome basis, create environmental models for similar risk assessment and management problems. The unique aspect of FRAMES is to dynamically introduce software modules representing individual components of a risk assessment (e.g., source release of contaminants, fate and transport in various environmental media, exposure, etc.) within a software framework, manipulate their attributes and run simulations to obtain results. This paper outlines the fundamental constituents of FRAMES 2.X, an enhanced version of FRAMES 1.X, that greatly improve the ability of the module developers to “plug” their self-developed software modules into the system. The basic design, the underlying principles and a discussion of the guidelines for module developers are presented.

  10. Study of the one dimensional electron gas arrays confined by steps in vicinal GaN/AlGaN heterointerfaces

    SciTech Connect

    Li, Huijie E-mail: sh-yyang@semi.ac.cn; Zhao, Guijuan; Liu, Guipeng; Wei, Hongyuan; Jiao, Chunmei; Yang, Shaoyan E-mail: sh-yyang@semi.ac.cn; Wang, Lianshan; Zhu, Qinsheng

    2014-05-21

    One dimensional electron gas (1DEG) arrays in vicinal GaN/AlGaN heterostructures have been studied. The steps at the interface would lead to the lateral barriers and limit the electron movement perpendicular to such steps. Through a self-consistent Schrdinger-Poisson approach, the electron energy levels and wave functions were calculated. It was found that when the total electron density was increased, the lateral barriers were lowered due to the screening effects by the electrons, and the electron gas became more two-dimension like. The calculated 1DEG densities were compared to the experimental values and good agreements were found. Moreover, we found that a higher doping density is more beneficial to form 1-D like electron gas arrays.

  11. A Ten Step Protocol and Plan for CCS Site Characterization, Based on an Analysis of the Rocky Mountain Region, USA

    SciTech Connect

    McPherson, Brian; Matthews, Vince

    2013-09-15

    This report expresses a Ten-Step Protocol for CO2 Storage Site Characterization, the final outcome of an extensive Site Characterization analysis of the Rocky Mountain region, USA. These ten steps include: (1) regional assessment and data gathering; (2) identification and analysis of appropriate local sites for characterization; (3) public engagement; (4) geologic and geophysical analysis of local site(s); (5) stratigraphic well drilling and coring; (6) core analysis and interpretation with other data; (7) database assembly and static model development; (8) storage capacity assessment; (9) simulation and uncertainty assessment; (10) risk assessment. While the results detailed here are primarily germane to the Rocky Mountain region, the intent of this protocol is to be portable or generally applicable for CO2 storage site characterization.

  12. New Types of Unstable Step-Flow Growth on Si(111)-(7x7) during Molecular Beam Epitaxy: Scaling and Universality

    SciTech Connect

    Omi, Hiroo; Homma, Yoshikazu; Tonchev, Vesselin; Pimpinelli, Alberto

    2005-11-18

    New types of unstable homoepitaxial growth of vicinal Si(111)-(7x7) surfaces are studied using ex situ atomic force microscopy. The growth features are two types of step bunching with straight step edges between 700 and 775 deg. C and one type of simultaneous bunching and meandering at 800 deg. C. The results of a quantitative size scaling analysis of the straight steps are discussed from the perspective of universality classes in bunching theory.

  13. Optical monitor for real time thickness change measurements via lateral-translation induced phase-stepping interferometry

    DOEpatents

    Rushford, Michael C.

    2002-01-01

    An optical monitoring instrument monitors etch depth and etch rate for controlling a wet-etching process. The instrument provides means for viewing through the back side of a thick optic onto a nearly index-matched interface. Optical baffling and the application of a photoresist mask minimize spurious reflections to allow for monitoring with extremely weak signals. A Wollaston prism enables linear translation for phase stepping.

  14. Process for separating carbon dioxide from flue gas using sweep-based membrane separation and absorption steps

    DOEpatents

    Wijmans, Johannes G.; Baker, Richard W.; Merkel, Timothy C.

    2012-08-21

    A gas separation process for treating flue gases from combustion processes, and combustion processes including such gas separation. The invention involves routing a first portion of the flue gas stream to be treated to an absorption-based carbon dioxide capture step, while simultaneously flowing a second portion of the flue gas across the feed side of a membrane, flowing a sweep gas stream, usually air, across the permeate side, then passing the permeate/sweep gas to the combustor.

  15. Stepped-anneal and total helium/hydrogen measurements in high-energy proton-irradiated tungsten

    SciTech Connect

    Oliver, B.M.; Hamilton, M.L.; Garner, F.A.; Sommer, W.F.; Maloy, S.A.; Ferguson, P.D.

    1998-12-31

    To provide structural material design data for the Accelerator Production of Tritium (APT) project, a 1 mA, 800 MeV proton beam at the Los Alamos Neutron Science Center (LANSCE) was used to irradiate a large number of metal samples, including a tungsten target similar to that being considered as the neutron source for the tritium production. The maximum proton fluence to the tungsten target was {approximately} 10{sup 21} protons/cm{sup 2}. An unavoidable byproduct of spallation reactions is the formation of large amounts of hydrogen and helium. Postulated accident scenarios for APT involving the use of tungsten rods clad with Alloy 718, raise concerns as to the amount and rate of release of these gases due to temperatures increases from afterheat accumulation, with the major concern being pressurizing and possibly failure of the cladding. To address these issues, portions of the LANSCE tungsten rods were subjected to temperature histories calculated as likely to occur, and the time-dependent evolution of helium and hydrogen gases was measured. Stepped-anneal and total helium/hydrogen measurements were conducted on multiple samples of the tungsten material. Helium measurements were conducted at Pacific Northwest National Laboratory (PNNL) using a high-sensitivity magnetic-sector isotope-dilution helium analysis system. Stepped-anneal measurements were conducted at temperatures from {approximately} 25 C to {approximately} 1,600 C in {approximately} 100 C steps. Total helium measurements were conducted by rapid vaporization after completion of the stepped-anneal process, and are compared with Monte Carlo calculations performed at Los Alamos National Laboratory (LANL) using the LAHET code system. Hydrogen measurements were conducted between {approximately} 750 C and {approximately} 1,200 C using a high-temperature furnace that had been extensively modified for the application. Hydrogen detection was accomplished by periodic sampling of the furnace gas using a separate

  16. Two step novel hydrogen system using additives to enhance hydrogen release from the hydrolysis of alane and activated aluminum

    SciTech Connect

    Zidan, Ragaiy; Teprovich, Joseph A.; Motyka, Theodore

    2015-12-01

    A system for the generation of hydrogen for use in portable power systems is set forth utilizing a two-step process that involves the thermal decomposition of AlH.sub.3 (10 wt % H.sub.2) followed by the hydrolysis of the activated aluminum (Al*) byproduct to release additional H.sub.2. Additionally, a process in which water is added directly without prior history to the AlH.sub.3:PA composite is also disclosed.

  17. Method And Aparatus For Improving Resolution In Spectrometers Processing Output Steps From Non-Ideal Signal Sources

    DOEpatents

    Warburton, William K.; Momayezi, Michael

    2003-07-01

    A method and apparatus for processing step-like output signals generated by non-ideal, nominally single-pole ("N-1P") devices responding to possibly time-varying, pulse-like input signals of finite duration, wherein the goal is to recover the integrated areas of the input signals. Particular applications include processing step-like signals generated by detector systems in response to absorbed radiation or particles and, more particularly, to digitally processing such step-like signals in high resolution, high rate gamma ray (.gamma.-ray) spectrometers with resistive feedback preamplifiers connected to large volume germanium detectors. Superconducting bolometers can be similarly treated. The method comprises attaching a set of one or more filters to the device's (e.g., preamplifier's) output, capturing a correlated multiple output sample from the filter set in response to a detected event, and forming a weighted sum of the sample values to accurately recover the total area (e.g., charge) of the detected event.

  18. Chemical Characterization and Water Content Determination of Bio-Oils Obtained from Various Biomass Species using 31P NMR Spectroscopy

    SciTech Connect

    David, K.; Ben, H.; Muzzy, J.; Feik, C.; Iisa, K.; Ragauskas, A.

    2012-03-01

    Pyrolysis is a promising approach to utilize biomass for biofuels. One of the key challenges for this conversion is how to analyze complicated components in the pyrolysis oils. Water contents of pyrolysis oils are normally analyzed by Karl Fischer titration. The use of 2-chloro-4,4,5,5,-tetramethyl-1,3,2-dioxaphospholane followed by {sup 31}P NMR analysis has been used to quantitatively analyze the structure of hydroxyl groups in lignin and whole biomass. Results: {sup 31}P NMR analysis of pyrolysis oils is a novel technique to simultaneously characterize components and analyze water contents in pyrolysis oils produced from various biomasses. The water contents of various pyrolysis oils range from 16 to 40 wt%. The pyrolysis oils obtained from Loblolly pine had higher guaiacyl content, while that from oak had a higher syringyl content. Conclusion: The comparison with Karl Fischer titration shows that {sup 31}P NMR could also reliably be used to measure the water content of pyrolysis oils. Simultaneously with analysis of water content, quantitative characterization of hydroxyl groups, including aliphatic, C-5 substituted/syringyl, guaiacyl, p-hydroxyl phenyl and carboxylic hydroxyl groups, could also be provided by {sup 31}P NMR analysis.

  19. Petroleum and geothermal production technology in Russia: Summary of information obtained during informational meetings with several Russian Institutes

    SciTech Connect

    Schafer, D.M.; Glowka, D.A.; Teufel, L.W.

    1995-04-01

    Russian scientists and engineers have drilled the deepest holes in the world. It is recognized that this experience has given them an expertise in drilling superdeep holes, as well as other aspects of drilling, completions, and geophysics. More and more US oil and gas companies are vigorously expanding their exploration and development into Russia. It is important for them to identify and use Russian technology in drilling, completion, logging, and reservoir characterization to the extent possible, in order to both reduce drilling costs and help support the Russian economy. While these US companies are interested in becoming involved in and/or sponsoring research in Russia, they have been unsure as to which scientists and institutes are working on problems of interest. It was also important to determine in which areas Russian technology is farther advanced than in the West. Such technology could then be commercialized as part of the Industrial Partnering Program. In order to develop a clear understanding of these issues, two Sandia engineers with drilling and completions expertise and a geophysicist with expertise in reservoir analysis traveled to Russia to meet with Russian scientists and engineers to discuss their technologies and areas of interest. This report contains a summary of the information obtained during the visit.

  20. Design, operational experiences and beam results obtained with the SNS H- ion source and LEBT at Berkeley Lab

    SciTech Connect

    Keller, R.; Thomae, R.; Stockli, M.; Welton, R.

    2002-04-15

    The ion source and Low-Energy Transport (LEBT) system that will provide H{sup -} ion beams to the Spallation Neutron Source (SNS)** Front End and the accelerator chain have been developed into a mature unit that fully satisfies the operational requirements through the commissioning and early operating phases of SNS. Compared to the early R&D version, many features of the ion source have been improved, and reliable operation at 6% duty factor has been achieved producing beam currents in the 35-mA range and above. LEBT operation proved that the purely electrostatic focusing principle is well suited to inject the ion beam into the RFQ accelerator, including the steering and pre-chopping functions. This paper will discuss the latest design features of the ion source and LEBT, give performance data for the integrated system, and report on commissioning results obtained with the SNS RFQ and Medium-Energy Beam Transport (MEBT) system. Prospects for further improvements will be outlined in concluding remarks.