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Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Performance Metrics for Commercial Buildings  

SciTech Connect (OSTI)

Commercial building owners and operators have requested a standard set of key performance metrics to provide a systematic way to evaluate the performance of their buildings. The performance metrics included in this document provide standard metrics for the energy, water, operations and maintenance, indoor environmental quality, purchasing, waste and recycling and transportation impact of their building. The metrics can be used for comparative performance analysis between existing buildings and industry standards to clarify the impact of sustainably designed and operated buildings.

Fowler, Kimberly M.; Wang, Na; Romero, Rachel L.; Deru, Michael P.

2010-09-30T23:59:59.000Z

2

ARM - 2007 Performance Metrics  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert SouthwestTechnologies |November 2011AstudiesRing Under7 Performance Metrics Science

3

ARM - 2009 Performance Metrics  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert SouthwestTechnologies |November 2011AstudiesRing Under79 Performance Metrics Science

4

ARM - 2008 Performance Metrics  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert SouthwestTechnologies |November 2011AstudiesRing Under7 Performance8 Performance

5

ARM - 2006 Performance Metrics  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert SouthwestTechnologies |November 2011AstudiesRing Under Maintenance8Meeting6 Performance

6

Integration of the EM Corporate QA Performance Metrics With Performanc...  

Office of Environmental Management (EM)

Integration of the EM Corporate QA Performance Metrics With Performance Analysis Process Integration of the EM Corporate QA Performance Metrics With Performance Analysis Process...

7

Performance Metrics Research Project - Final Report  

SciTech Connect (OSTI)

NREL began work for DOE on this project to standardize the measurement and characterization of building energy performance. NREL's primary research objectives were to determine which performance metrics have greatest value for determining energy performance and to develop standard definitions and methods of measuring and reporting that performance.

Deru, M.; Torcellini, P.

2005-10-01T23:59:59.000Z

8

Evaluation Criteria for Human-Automation Performance Metrics  

E-Print Network [OSTI]

Previous research has identified broad metric classes for human-automation performance to facilitate metric selection, as well as understanding and comparison of research results. However, there is still lack of an objective ...

Pina, Patricia Elena

9

Office of HC Strategy Budget and Performance Metrics (HC-50)...  

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

and partner agencies on strategic human capital management, performance metrics, workforce analysis and succession planning. Leadership Tony Nguyen Director of the Office...

10

Improving enterprise decision-making : the benefits of metric commonality  

E-Print Network [OSTI]

The objective of this research is to identify a new approach in managing, and making internal program-level decisions from, externally tracked performance metrics. Industry observations indicate the increasing challenge ...

Friedman, Alissa H. (Alissa Heather)

2010-01-01T23:59:59.000Z

11

algorithm performance metrics: Topics by E-print Network  

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

Summary: New set of metrics for the computational performance of IS-ENES Earth System Models TRCMGC1473 U performance of Earth System Models is developed and used for an...

12

Estimation of Photovoltaic System Reliability and Performance Metrics  

E-Print Network [OSTI]

1 Estimation of Photovoltaic System Reliability and Performance Metrics Sairaj V. Dhople, Student reliability and perfor- mance analysis of grid-tied photovoltaic (PV) systems is for- mulated using Markov and energy yield, and reliability metrics such as availability. The paper also provides an analytical method

Liberzon, Daniel

13

Metrics to Characterize Airport Operational Performance Using Surface Surveillance Data  

E-Print Network [OSTI]

Tower BOS Boston General Edward Lawrence Logan International Airport EDCT Expected Departure Clearance International Airport, and are therefore evaluated and discussed using this airport as an example. These metricsMetrics to Characterize Airport Operational Performance Using Surface Surveillance Data Harshad

Gummadi, Ramakrishna

14

New set of metrics for the computational performance  

E-Print Network [OSTI]

New set of metrics for the computational performance of IS-ENES Earth System Models TR/CMGC/14/73 U performance of Earth System Models is developed and used for an initial performance analysis of the EC models.................................................................................................................................5 2.1 List of Participating Earth System Models

15

Implementing the Data Center Energy Productivity Metric in a High Performance Computing Data Center  

SciTech Connect (OSTI)

As data centers proliferate in size and number, the improvement of their energy efficiency and productivity has become an economic and environmental imperative. Making these improvements requires metrics that are robust, interpretable, and practical. We discuss the properties of a number of the proposed metrics of energy efficiency and productivity. In particular, we focus on the Data Center Energy Productivity (DCeP) metric, which is the ratio of useful work produced by the data center to the energy consumed performing that work. We describe our approach for using DCeP as the principal outcome of a designed experiment using a highly instrumented, high-performance computing data center. We found that DCeP was successful in clearly distinguishing different operational states in the data center, thereby validating its utility as a metric for identifying configurations of hardware and software that would improve energy productivity. We also discuss some of the challenges and benefits associated with implementing the DCeP metric, and we examine the efficacy of the metric in making comparisons within a data center and between data centers.

Sego, Landon H.; Marquez, Andres; Rawson, Andrew; Cader, Tahir; Fox, Kevin M.; Gustafson, William I.; Mundy, Christopher J.

2013-06-30T23:59:59.000Z

16

Performance Metrics Tiers | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F SSalesOE0000652Grow YourPerformance Audit of

17

Deep Energy Retrofit Performance Metric Comparison: Eight California Case Studies  

SciTech Connect (OSTI)

In this paper we will present the results of monitored annual energy use data from eight residential Deep Energy Retrofit (DER) case studies using a variety of performance metrics. For each home, the details of the retrofits were analyzed, diagnostic tests to characterize the home were performed and the homes were monitored for total and individual end-use energy consumption for approximately one year. Annual performance in site and source energy, as well as carbon dioxide equivalent (CO{sub 2}e) emissions were determined on a per house, per person and per square foot basis to examine the sensitivity to these different metrics. All eight DERs showed consistent success in achieving substantial site energy and CO{sub 2}e reductions, but some projects achieved very little, if any source energy reduction. This problem emerged in those homes that switched from natural gas to electricity for heating and hot water, resulting in energy consumption dominated by electricity use. This demonstrates the crucial importance of selecting an appropriate metric to be used in guiding retrofit decisions. Also, due to the dynamic nature of DERs, with changes in occupancy, size, layout, and comfort, several performance metrics might be necessary to understand a project’s success.

Walker, Iain; Fisher, Jeremy; Less, Brennan

2014-06-01T23:59:59.000Z

18

Design and Development of Performance Metrics for Elite Runners  

E-Print Network [OSTI]

metric with distance for Jimmy for both feet Figure 5.29:metric vs. Distance for Jimmy Figure 5.32: Over-strideCDEL metric vs. Distance for Jimmy Figure 5.35: CDEL metric

Mittal, Nikhil R.

2012-01-01T23:59:59.000Z

19

Towards Performance Measurement And Metrics Based Analysis of PLA Applications  

E-Print Network [OSTI]

This article is about a measurement analysis based approach to help software practitioners in managing the additional level complexities and variabilities in software product line applications. The architecture of the proposed approach i.e. ZAC is designed and implemented to perform preprocessesed source code analysis, calculate traditional and product line metrics and visualize results in two and three dimensional diagrams. Experiments using real time data sets are performed which concluded with the results that the ZAC can be very helpful for the software practitioners in understanding the overall structure and complexity of product line applications. Moreover the obtained results prove strong positive correlation between calculated traditional and product line measures.

Ahmed, Zeeshan

2010-01-01T23:59:59.000Z

20

Co-Designing Sustainable Communities: The Identification and Incorporation of Social Performance Metrics in Native American Sustainable Housing and Renewable Energy System Design  

E-Print Network [OSTI]

3) sustainability indicators or performance metrics forof situated performance metrics or indicators that aren’t3) sustainability indicators or performance metrics for

Shelby, Ryan

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Building Cost and Performance Metrics: Data Collection Protocol, Revision 1.0  

SciTech Connect (OSTI)

This technical report describes the process for selecting and applying the building cost and performance metrics for measuring sustainably designed buildings in comparison to traditionally designed buildings.

Fowler, Kimberly M.; Solana, Amy E.; Spees, Kathleen L.

2005-09-29T23:59:59.000Z

22

Improving Deaerator Performance  

E-Print Network [OSTI]

The objectives of deaeration of feedwater are reviewed. A discussion of appropriate test data and methods for assessing deaerator performance are given. Analysis procedures are developed to analyze the test data. Typical problems such as over...

Dyer, D. F.; Maples, G.

23

Ad Hoc Networking Critical Features and Performance Metrics Madhavi W. Subbarao  

E-Print Network [OSTI]

Ad Hoc Networking Critical Features and Performance Metrics Madhavi W. Subbarao Wireless Communications Technology Group, NIST October 7, 1999 A mobile ad hoc network MANET is an autonomous collection networking features and performance metrics for assessing the behav- ior of an ad-hoc network are identi ed

24

Simulation information regarding Sandia National Laboratories%3CU%2B2019%3E trinity capability improvement metric.  

SciTech Connect (OSTI)

Sandia National Laboratories, Los Alamos National Laboratory, and Lawrence Livermore National Laboratory each selected a representative simulation code to be used as a performance benchmark for the Trinity Capability Improvement Metric. Sandia selected SIERRA Low Mach Module: Nalu, which is a uid dynamics code that solves many variable-density, acoustically incompressible problems of interest spanning from laminar to turbulent ow regimes, since it is fairly representative of implicit codes that have been developed under ASC. The simulations for this metric were performed on the Cielo Cray XE6 platform during dedicated application time and the chosen case utilized 131,072 Cielo cores to perform a canonical turbulent open jet simulation within an approximately 9-billion-elementunstructured- hexahedral computational mesh. This report will document some of the results from these simulations as well as provide instructions to perform these simulations for comparison.

Agelastos, Anthony Michael; Lin, Paul T.

2013-10-01T23:59:59.000Z

25

Impact of Different Economic Performance Metrics on the Perceived Value of Solar Photovoltaics  

SciTech Connect (OSTI)

Photovoltaic (PV) systems are installed by several types of market participants, ranging from residential customers to large-scale project developers and utilities. Each type of market participant frequently uses a different economic performance metric to characterize PV value because they are looking for different types of returns from a PV investment. This report finds that different economic performance metrics frequently show different price thresholds for when a PV investment becomes profitable or attractive. Several project parameters, such as financing terms, can have a significant impact on some metrics [e.g., internal rate of return (IRR), net present value (NPV), and benefit-to-cost (B/C) ratio] while having a minimal impact on other metrics (e.g., simple payback time). As such, the choice of economic performance metric by different customer types can significantly shape each customer's perception of PV investment value and ultimately their adoption decision.

Drury, E.; Denholm, P.; Margolis, R.

2011-10-01T23:59:59.000Z

26

Advanced Fuels Campaign Light Water Reactor Accident Tolerant Fuel Performance Metrics Executive Summary  

SciTech Connect (OSTI)

Research and development (R&D) activities on advanced, higher performance Light Water Reactor (LWR) fuels have been ongoing for the last few years. Following the unfortunate March 2011 events at the Fukushima Nuclear Power Plant in Japan, the R&D shifted toward enhancing the accident tolerance of LWRs. Qualitative attributes for fuels with enhanced accident tolerance, such as improved reaction kinetics with steam resulting in slower hydrogen generation rate, provide guidance for the design and development of fuels and cladding with enhanced accident tolerance. A common set of technical metrics should be established to aid in the optimization and down selection of candidate designs on a more quantitative basis. “Metrics” describe a set of technical bases by which multiple concepts can be fairly evaluated against a common baseline and against one another. This report describes a proposed technical evaluation methodology that can be applied to evaluate the ability of each concept to meet performance and safety goals relative to the current UO2 – zirconium alloy system and relative to one another. The resultant ranked evaluation can then inform concept down-selection, such that the most promising accident tolerant fuel design option(s) can continue to be developed toward qualification.

Shannon Bragg-Sitton

2014-02-01T23:59:59.000Z

27

Performance metrics for Inertial Confinement Fusion implosions: aspects of the technical framework for measuring progress in the National Ignition Campaign  

SciTech Connect (OSTI)

The National Ignition Campaign (NIC) uses non-igniting 'THD' capsules to study and optimize the hydrodynamic assembly of the fuel without burn. These capsules are designed to simultaneously reduce DT neutron yield and to maintain hydrodynamic similarity with the DT ignition capsule. We will discuss nominal THD performance and the associated experimental observables. We will show the results of large ensembles of numerical simulations of THD and DT implosions and their simulated diagnostic outputs. These simulations cover a broad range of both nominal and off nominal implosions. We will focus on the development of an experimental implosion performance metric called the experimental ignition threshold factor (ITFX). We will discuss the relationship between ITFX and other integrated performance metrics, including the ignition threshold factor (ITF), the generalized Lawson criterion (GLC), and the hot spot pressure (HSP). We will then consider the experimental results of the recent NIC THD campaign. We will show that we can observe the key quantities for producing a measured ITFX and for inferring the other performance metrics. We will discuss trends in the experimental data, improvement in ITFX, and briefly the upcoming tuning campaign aimed at taking the next steps in performance improvement on the path to ignition on NIF.

Spears, B K; Glenzer, S; Edwards, M J; Brandon, S; Clark, D; Town, R; Cerjan, C; Dylla-Spears, R; Mapoles, E; Munro, D; Salmonson, J; Sepke, S; Weber, S; Hatchett, S; Haan, S; Springer, P; Moses, E; Mapoles, E; Munro, D; Salmonson, J; Sepke, S

2011-12-16T23:59:59.000Z

28

Advanced Fuels Campaign Light Water Reactor Accident Tolerant Fuel Performance Metrics  

SciTech Connect (OSTI)

The safe, reliable and economic operation of the nation’s nuclear power reactor fleet has always been a top priority for the United States’ nuclear industry. As a result, continual improvement of technology, including advanced materials and nuclear fuels, remains central to industry’s success. Decades of research combined with continual operation have produced steady advancements in technology and yielded an extensive base of data, experience, and knowledge on light water reactor (LWR) fuel performance under both normal and accident conditions. In 2011, following the Great East Japan Earthquake, resulting tsunami, and subsequent damage to the Fukushima Daiichi nuclear power plant complex, enhancing the accident tolerance of LWRs became a topic of serious discussion. As a result of direction from the U.S. Congress, the U.S. Department of Energy Office of Nuclear Energy (DOE-NE) initiated an Accident Tolerant Fuel (ATF) Development program. The complex multiphysics behavior of LWR nuclear fuel makes defining specific material or design improvements difficult; as such, establishing qualitative attributes is critical to guide the design and development of fuels and cladding with enhanced accident tolerance. This report summarizes a common set of technical evaluation metrics to aid in the optimization and down selection of candidate designs. As used herein, “metrics” describe a set of technical bases by which multiple concepts can be fairly evaluated against a common baseline and against one another. Furthermore, this report describes a proposed technical evaluation methodology that can be applied to assess the ability of each concept to meet performance and safety goals relative to the current UO2 – zirconium alloy system and relative to one another. The resultant ranked evaluation can then inform concept down-selection, such that the most promising accident tolerant fuel design option(s) can continue to be developed for lead test rod or lead test assembly insertion into a commercial reactor within the desired timeframe (by 2022).

Brad Merrill; Melissa Teague; Robert Youngblood; Larry Ott; Kevin Robb; Michael Todosow; Chris Stanek; Mitchell Farmer; Michael Billone; Robert Montgomery; Nicholas Brown; Shannon Bragg-Sitton

2014-02-01T23:59:59.000Z

29

Recent performance improvements on FXR  

SciTech Connect (OSTI)

The FXR machine is a nominal 4-kA, 20-MeV, linear-induction, electron accelerator for flash radiography at LLNL. The machine met its baseline requirements in March 1982. Since then, the performance has been greatly improved. We have achieved stable and repeatable beam acceleration and transport, with over 80% transmission to the tungsten bremsstrahlung target located some 35 m downstream. For best stability, external-beam steering has been eliminated almost entirely. We regularly produce over 500 Roentgen at 1 m from the target (TLD measurement), with a radiographic spot size of 3 to 5 mm. Present efforts are directed towards the development of a 4-kA tune, working interactively with particle-field and beam transport code models. A remaining uncertainty is the possible onset of RF instabilities at the higher current levels.

Kulke, B.; Kihara, R.

1983-01-01T23:59:59.000Z

30

Advanced fenestration systems for improved daylight performance  

E-Print Network [OSTI]

Systems for Improved Daylight Performance S. Selkowitz, E.S.Systems for Improved Daylight Performance S. Selkowitz, E.S.Introduction The use of daylight to replace or supplement

Selkowitz, S.; Lee, E.S.

1998-01-01T23:59:59.000Z

31

Sustaining Performance Improvements in Energy Intensive Industries  

E-Print Network [OSTI]

Experience has shown that significant opportunity for performance improvements exists in energy intensive operations. Often, efforts to improve efficiency focus on vendor-led initiatives to improve operations of particular equipment. This approach...

Moore, D. A.

2005-01-01T23:59:59.000Z

32

Refractory Lining Material Improves Gasifer Performance  

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

water GASIFICATION CHAMBER the ENERGY lab NATIONAL ENERGY TECHNOLOGY LABORATORY Technology Transfer Refractory Lining Material Improves Gasifier Performance Award Winning...

33

Improving pulverized coal plant performance  

SciTech Connect (OSTI)

A major deliverable of the U.S. Department of Energy (DOE) project ``Engineering Development of Advanced Coal-Fired Low-Emissions Boiler Systems`` (LEBS) is the design of a large, in this case 400 MWe, commercial generating unit (CGU) which will meet the Project objectives. The overall objective of the LEBS Project is to dramatically improve environmental performance of future pulverized coal fired power plants without adversely impacting efficiency or the cost of electricity. The DOE specified the use of near-term technologies, i.e., advanced technologies that partially developed, to reduce NO{sub x}, SO{sub 2} and particulate emissions to be substantially less than current NSPS limits. In addition, air toxics must be in compliance and waste must be reduced and made more disposable. The design being developed by the ABB Team is projected to meet all the contract objectives and to reduce emission of NO{sub x}, SO{sub 2} and particulates to one-fifth to one-tenth NSPS limits while increasing net station efficiency significantly and reducing the cost of electricity. This design and future work are described in the paper.

Regan, J.W.; Borio, R.W.; Palkes, M.; Mirolli, M. [ABB Combustion Engineering, Inc., Windsor, CT (United States); Wesnor, J.D. [ABB Environmental Systems, Birmingham, AL (United States); Bender, D.J. [Raytheon Engineers and Constructors, Inc., New York, NY (United States)

1995-12-31T23:59:59.000Z

34

Science as Knowledge, Practice, and Map Making: The Challenge of Defining Metrics for Evaluating and Improving DOE-Funded Basic Experimental Science  

SciTech Connect (OSTI)

Industrial R&D laboratories have been surprisingly successful in developing performance objectives and metrics that convincingly show that planning, management, and improvement techniques can be value-added to the actual output of R&D organizations. In this paper, I will discuss the more difficult case of developing analogous constructs for DOE-funded non-nuclear, non-weapons basic research, or as I will refer to it - basic experimental science. Unlike most industrial R&D or the bulk of applied science performed at the National Renewable Energy Laboratory (NREL), the purpose of basic experimental science is producing new knowledge (usually published in professional journals) that has no immediate application to the first link (the R) of a planned R&D chain. Consequently, performance objectives and metrics are far more difficult to define. My claim is that if one can successfully define metrics for evaluating and improving DOE-funded basic experimental science (which is the most difficult case), then defining such constructs for DOE-funded applied science should be much less problematic. With the publication of the DOE Standard - Implementation Guide for Quality Assurance Programs for Basic and Applied Research (DOE-ER-STD-6001-92) and the development of a conceptual framework for integrating all the DOE orders, we need to move aggressively toward the threefold next phase: (1) focusing the management elements found in DOE-ER-STD-6001-92 on the main output of national laboratories - the experimental science itself; (2) developing clearer definitions of basic experimental science as practice not just knowledge; and (3) understanding the relationship between the metrics that scientists use for evaluating the performance of DOE-funded basic experimental science, the management elements of DOE-ER-STD-6001-92, and the notion of continuous improvement.

Bodnarczuk, M.

1993-03-01T23:59:59.000Z

35

Predicting Improved Chiller Performance Through Thermodynamic Modeling  

E-Print Network [OSTI]

This paper presents two case studies in which thermodynamic modeling was used to predict improved chiller performance. The model predicted the performance (COP and total energy consumption) of water-cooled centrifugal chillers as a function...

Figueroa, I. E.; Cathey, M.; Medina, M. A.; Nutter, D. W.

36

Light Water Reactor Sustainability Program Operator Performance Metrics for Control Room Modernization: A Practical Guide for Early Design Evaluation  

SciTech Connect (OSTI)

As control rooms are modernized with new digital systems at nuclear power plants, it is necessary to evaluate the operator performance using these systems as part of a verification and validation process. There are no standard, predefined metrics available for assessing what is satisfactory operator interaction with new systems, especially during the early design stages of a new system. This report identifies the process and metrics for evaluating human system interfaces as part of control room modernization. The report includes background information on design and evaluation, a thorough discussion of human performance measures, and a practical example of how the process and metrics have been used as part of a turbine control system upgrade during the formative stages of design. The process and metrics are geared toward generalizability to other applications and serve as a template for utilities undertaking their own control room modernization activities.

Ronald Boring; Roger Lew; Thomas Ulrich; Jeffrey Joe

2014-03-01T23:59:59.000Z

37

Data Mining in Metric Space: An Empirical Analysis of Supervised Learning Performance Criteria  

E-Print Network [OSTI]

Error, Cross Entropy, and Prob- ability Calibration. Multidimensional scaling (MDS) shows- terpreted as probabilities: squared error, cross entropy, and calibration, lay in one part of metric space metrics such as ROC area and average precision. We introduce a new metric, SAR, that combines squared

Caruana, Rich

38

Improved Building Performance Through Effective Communication & Training  

E-Print Network [OSTI]

IMPROVED BUILDING PERFORMANCE THROUGH EFFECTIVE COMMUNICATION & TRAINING Rick Bates Project Manager Environmental Education Foundation Gilbert, AZ ABSTRACT This paper describes the procedures involved in the development of a... variety of stake holders with respect to “Best Practices” for improved indoor air quality during the design, construction, operation and maintenance of commercial, educational, institutional, and large residential buildings. Specific training...

Bates, R.

2005-01-01T23:59:59.000Z

39

An improved theory for regenerative pump performance  

E-Print Network [OSTI]

An improved theory for regenerative pump performance T Meakhail and S O Park Department. DOI: 10.1243/095765005X7565 Abstract: Owing to their low specific speed, regenerative pumps allow high heads with small flow rates and have performance curves with very stable features. This kind of pump

Kim, Yong Jung

40

Improving Unit Operations-Test Station Performance  

E-Print Network [OSTI]

IMPROVING UNIT OPERATIONS - TEST STATION PERFORMANCE JosqIb 1. Filak. Jr, ? Corporate Energy Manager. Park.er?Hannafin COfpontioo- Cleveland. Oh ABSTRACT: This program's basic concept deals with the possibilities for reducing energy efficiency... requirements, control operation test performance functions more successfully, and retain peak load surges from reaching higher utility rate expense levels. 142 ESL-IE-95-04-23 Proceedings from the Seventeenth Industrial Energy Technology Conference...

Filak, J. J. Jr.

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Implementation Guide - Aviation Program Performance Indicators (Metrics) for use with DOE O 440.2B, Aviation Management And Safety  

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

The Guide provides information regarding Departmental expectations on provisions of DOE 440.2B, identifies acceptable methods of implementing Aviation Program Performance Indicators (Metrics) requirements in the Order, and identifies relevant principles and practices by referencing Government and non-Government standards. Canceled by DOE G 440.2B-1A.

2002-12-10T23:59:59.000Z

42

Implementation Guide - Performance Indicators (Metrics ) for Use with DOE O 440.2B, Aviation Management and Safety  

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

The Guide provides information regarding specific provisions of DOE O 440.2B and is intended to be useful in understanding and implementing performance indicators (metrics) required by the Order. Cancels DOE G 440.2B-1. Canceled by DOE N 251.98.

2005-09-19T23:59:59.000Z

43

Improved plant performance through evaporative steam condensing  

SciTech Connect (OSTI)

Combining an open cooling tower and a steam condenser into one common unit is a proven technology with many advantages in power generation application, including reduced first cost of equipment, reduced parasitic energy consumption, simplified design, reduced maintenance, and simplified water treatment, Performance of the steam turbine benefits from the direct approach to wet bulb temperature, and operating flexibility and reliability improve compared to a system with a cooling tower and surface condenser. System comparisons and case histories will be presented to substantiate improved systems economies.

Hutton, D.

1998-07-01T23:59:59.000Z

44

Possible Origin of Improved High Temperature Performance of Hydrotherm...  

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

Origin of Improved High Temperature Performance of Hydrothermally Aged CuBeta Zeolite Catalysts. Possible Origin of Improved High Temperature Performance of Hydrothermally Aged...

45

Electrospray characteristic curves: in pursuit of improved performance...  

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

Electrospray characteristic curves: in pursuit of improved performance in the nano-flow regime. Electrospray characteristic curves: in pursuit of improved performance in the...

46

Smart Grid Projects Are Improving Performance and Helping Consumers...  

Energy Savers [EERE]

Smart Grid Projects Are Improving Performance and Helping Consumers Better Manage their Energy Use Smart Grid Projects Are Improving Performance and Helping Consumers Better Manage...

47

Improving Steam System Performance: A Sourcebook for Industry...  

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

Improving Steam System Performance: A Sourcebook for Industry, Second Edition Improving Steam System Performance: A Sourcebook for Industry, Second Edition This sourcebook is...

48

Improving Access to Foundational Energy Performance Data  

SciTech Connect (OSTI)

Access to foundational energy performance data is key to improving the efficiency of the built environment. However, stakeholders often lack access to what they perceive as credible energy performance data. Therefore, even if a stakeholder determines that a product would increase efficiency, they often have difficulty convincing their management to move forward. Even when credible data do exist, such data are not always sufficient to support detailed energy performance analyses, or the development of robust business cases. One reason for this is that the data parameters that are provided are generally based on the respective industry norms. Thus, for mature industries with extensive testing standards, the data made available are often quite detailed. But for emerging technologies, or for industries with less well-developed testing standards, available data are generally insufficient to support robust analysis. However, even for mature technologies, there is no guarantee that the data being supplied are the same data needed to accurately evaluate a product?s energy performance. To address these challenges, the U.S. Department of Energy funded development of a free, publically accessible Web-based portal, the Technology Performance Exchange(TM), to facilitate the transparent identification, storage, and sharing of foundational energy performance data. The Technology Performance Exchange identifies the intrinsic, technology-specific parameters necessary for a user to perform a credible energy analysis and includes a robust database to store these data. End users can leverage stored data to evaluate the site-specific performance of various technologies, support financial analyses with greater confidence, and make better informed procurement decisions.

Studer, D.; Livingood, W.; Torcellini, P.

2014-08-01T23:59:59.000Z

49

Improving network routing performance in dynamic environments  

E-Print Network [OSTI]

for link quality predictability study . . . . . . . . . . . . . 107 79 Example of Internet path quality: average utilization of 40% . . . . . 108 80 Example of Internet path quality: average utilization of 60% . . . . . 109 81 Example of Internet path... quality: average utilization of 80% . . . . . 109 xvii FIGURE Page 82 Internet path quality differences: average utilization of 60% . . . . . 110 83 Autocorrelation functions of link quality metrics: average utiliza- tion of 40...

Liu, Yong

2007-04-25T23:59:59.000Z

50

Performance Improvements for Nuclear Reaction Network Integration  

E-Print Network [OSTI]

Aims: The aim of this work is to compare the performance of three reaction network integration methods used in stellar nucleosynthesis calculations. These are the Gear's backward differentiation method, Wagoner's method (a 2nd-order Runge-Kutta method), and the Bader-Deuflehard semi-implicit multi-step method. Methods: To investigate the efficiency of each of the integration methods considered here, a test suite of temperature and density versus time profiles is used. This suite provides a range of situations ranging from constant temperature and density to the dramatically varying conditions present in white dwarf mergers, novae, and x-ray bursts. Some of these profiles are obtained separately from full hydrodynamic calculations. The integration efficiencies are investigated with respect to input parameters that constrain the desired accuracy and precision. Results: Gear's backward differentiation method is found to improve accuracy, performance, and stability in integrating nuclear reaction networks. For te...

Longland, Richard; José, Jordi

2014-01-01T23:59:59.000Z

51

displacement method), accurate data, clearly de-fined future scenarios, and performance metrics  

E-Print Network [OSTI]

relevant to policy goals like reducing greenhouse gas emissions, petroleum inputs, and soil ero- sion_UMC_Report_10_05.pdf. 6. By convention, photosynthetic energy is ignored in this calculation. 7. H. Shapouri, J packaging, and effluent processing energy. The metric for petroleum use included crude oil used

Allen, Jont

52

Improving Pumping System Performance: A Sourcebook for Industry...  

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

Pumping System Performance: A Sourcebook for Industry - Second Edition Improving Pumping System Performance: A Sourcebook for Industry - Second Edition This sourcebook is designed...

53

Improving Process Heating System Performance: A Sourcebook for...  

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

Process Heating System Performance: A Sourcebook for Industry, Second Edition Improving Process Heating System Performance: A Sourcebook for Industry, Second Edition This...

54

Goal setting for improvement in product development performance of organizations  

E-Print Network [OSTI]

Companies have been constantly trying for ways and means to improve R&D performance as it is one of the most important competitive advantage tools of an organization. Literature review on R&D performance improvement suggests ...

Kashyap, Pankaj Kumar

2013-01-01T23:59:59.000Z

55

DOE JGI Quality Metrics; Approaches to Scaling and Improving Metagenome Assembly (Metagenomics Informatics Challenges Workshop: 10K Genomes at a Time)  

ScienceCinema (OSTI)

DOE JGI's Alex Copeland on "DOE JGI Quality Metrics" and Michigan State University's C. Titus Brown on "Approaches to Scaling and Improving Metagenome Assembly" at the Metagenomics Informatics Challenges Workshop held at the DOE JGI on October 12-13, 2011.

Copeland, Alex [DOE JGI]; Brown, C Titus [Michigan State University

2013-01-22T23:59:59.000Z

56

FY 2009 Annual Report of Joule Software Metric SC GG 3.1/2.5.2, Improve Computational Science Capabilities  

SciTech Connect (OSTI)

The Joule Software Metric for Computational Effectiveness is established by Public Authorizations PL 95-91, Department of Energy Organization Act, and PL 103-62, Government Performance and Results Act. The U.S. Office of Management and Budget (OMB) oversees the preparation and administration of the President s budget; evaluates the effectiveness of agency programs, policies, and procedures; assesses competing funding demands across agencies; and sets the funding priorities for the federal government. The OMB has the power of audit and exercises this right annually for each federal agency. According to the Government Performance and Results Act of 1993 (GPRA), federal agencies are required to develop three planning and performance documents: 1.Strategic Plan: a broad, 3 year outlook; 2.Annual Performance Plan: a focused, 1 year outlook of annual goals and objectives that is reflected in the annual budget request (What results can the agency deliver as part of its public funding?); and 3.Performance and Accountability Report: an annual report that details the previous fiscal year performance (What results did the agency produce in return for its public funding?). OMB uses its Performance Assessment Rating Tool (PART) to perform evaluations. PART has seven worksheets for seven types of agency functions. The function of Research and Development (R&D) programs is included. R&D programs are assessed on the following criteria: Does the R&D program perform a clear role? Has the program set valid long term and annual goals? Is the program well managed? Is the program achieving the results set forth in its GPRA documents? In Fiscal Year (FY) 2003, the Department of Energy Office of Science (DOE SC-1) worked directly with OMB to come to a consensus on an appropriate set of performance measures consistent with PART requirements. The scientific performance expectations of these requirements reach the scope of work conducted at the DOE national laboratories. The Joule system emerged from this interaction. Joule enables the chief financial officer and senior DOE management to track annual performance on a quarterly basis. Joule scores are reported as success, goal met (green light in PART), mixed results, goal partially met (yellow light in PART), and unsatisfactory, goal not met (red light in PART). Joule links the DOE strategic plan to the underlying base program targets.

Kothe, Douglas B [ORNL; Roche, Kenneth J [ORNL; Kendall, Ricky A [ORNL

2010-01-01T23:59:59.000Z

57

Performance Contracting for Public Sector Improvement Projects  

E-Print Network [OSTI]

Johnson Controls Building Efficiency | Solutions A.Denise Malloy Solutions Account Executive December 18, 2013 Alternative Financing for Energy Efficiency Performance Contracting ESL-KT-13-12-41 CATEE 2013: Clean Air Through Energy Efficiency... Conference, San Antonio, Texas Dec. 16-18 2 Johnson Controls Confidential Overview ? What is Performance Contracting? ? What is the Performance Contracting Process? ? When does Performance Contracting Work Best? ? Government Entity ? ESCO ? 3rd Party...

Mallory, A. D.

2013-01-01T23:59:59.000Z

58

Sootblowing optimization for improved boiler performance  

DOE Patents [OSTI]

A sootblowing control system that uses predictive models to bridge the gap between sootblower operation and boiler performance goals. The system uses predictive modeling and heuristics (rules) associated with different zones in a boiler to determine an optimal sequence of sootblower operations and achieve boiler performance targets. The system performs the sootblower optimization while observing any operational constraints placed on the sootblowers.

James, John Robert; McDermott, John; Piche, Stephen; Pickard, Fred; Parikh, Neel J.

2012-12-25T23:59:59.000Z

59

Sootblowing optimization for improved boiler performance  

DOE Patents [OSTI]

A sootblowing control system that uses predictive models to bridge the gap between sootblower operation and boiler performance goals. The system uses predictive modeling and heuristics (rules) associated with different zones in a boiler to determine an optimal sequence of sootblower operations and achieve boiler performance targets. The system performs the sootblower optimization while observing any operational constraints placed on the sootblowers.

James, John Robert; McDermott, John; Piche, Stephen; Pickard, Fred; Parikh, Neel J

2013-07-30T23:59:59.000Z

60

COSMOS{sup SM} based composite metrics  

SciTech Connect (OSTI)

Process improvement is one of the goals of many organizations. Metrics for measuring process improvement are key to consistent, focused improvement. This paper introduces an approach for developing robust metrics suitable for measuring the improvement in complex processes. The approach uses the Cosmos framework to guide the user in where to collect metrics and it uses the composite metric to guide the user in how to collect metrics.

Culross, M.J.; Leslie, M.D.; Toland, J.A. [Raytheon E-Systems, Dallas, TX (United States)

1996-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Improving consumer value through enhanced performance around...  

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

enhanced performance around the world LANL statistical tools have helped create Reliability Technology (RT), which increases the overall fraction of productive manufacturing...

62

Furnace Blower Performance Improvements - Building America Top...  

Energy Savers [EERE]

efficiencies of only 10%-15%. Researchers at Lawrence Berkeley National Laboratory (LBNL) garnered a 2013 Top Innovation award for their work on evaluating the performance of...

63

Improving SSL Handshake Performance via Batching Hovav Shacham Dan Boneh  

E-Print Network [OSTI]

Improving SSL Handshake Performance via Batching Hovav Shacham Dan Boneh hovav@cs.stanford.edu dabo@cs.stanford.edu Abstract We present an algorithmic approach for speeding up SSL's performance on a web server. Our approach improves the performance of SSL's handshake protocol by up to a factor of 2.5 for 1024-bit RSA keys

Boneh, Dan

64

Improving Processor Design by Exploiting Performance Variance  

E-Print Network [OSTI]

of a microarchitectural optimization optimization and not the rest of the microarchitecture. We explore performance variance caused by phase changes and develop prediction-driven last-level cache (LLC) writeback techniques. We propose a rank idle time...

Wang, Zhe

2014-07-28T23:59:59.000Z

65

SAPHIRE 8 Quality Assurance Software Metrics Report  

SciTech Connect (OSTI)

The purpose of this review of software metrics is to examine the quality of the metrics gathered in the 2010 IV&V and to set an outline for results of updated metrics runs to be performed. We find from the review that the maintenance of accepted quality standards presented in the SAPHIRE 8 initial Independent Verification and Validation (IV&V) of April, 2010 is most easily achieved by continuing to utilize the tools used in that effort while adding a metric of bug tracking and resolution. Recommendations from the final IV&V were to continue periodic measurable metrics such as McCabe's complexity measure to ensure quality is maintained. The four software tools used to measure quality in the IV&V were CodeHealer, Coverage Validator, Memory Validator, Performance Validator, and Thread Validator. These are evaluated based on their capabilities. We attempted to run their latest revisions with the newer Delphi 2010 based SAPHIRE 8 code that has been developed and was successful with all of the Validator series of tools on small tests. Another recommendation from the IV&V was to incorporate a bug tracking and resolution metric. To improve our capability of producing this metric, we integrated our current web reporting system with the SpiraTest test management software purchased earlier this year to track requirements traceability.

Kurt G. Vedros

2011-08-01T23:59:59.000Z

66

Improved System Performance and Reduced Cost of a Fuel Reformer...  

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

An advanced exhaust aftertreatment system developed to meet EPA 2010 and final Tier 4 emission regulations show substantial improvements in system performance while reducing system...

67

Intermetallic Electrodes Improve Safety and Performance in Lithium...  

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

Intermetallic Electrodes Improve Safety and Performance in Lithium-Ion Batteries Technology available for licensing: A new class of intermetallic material that can be used as a...

68

Improving Motor and Drive System Performance - A Sourcebook for...  

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

motors and drives, as well as resources for additional information, tools, software, videos, and training opportunities. Improving Motor and Drive System Performance - A...

69

Request for Information on Improving Performance of Federal Permitting...  

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

of Infrastructure Projects: Federal Register Notice Volume 78, No. 168 - August 29, 2013 Request for Information on Improving Performance of Federal Permitting and Review of...

70

Learning from Buildings: Technologies for Measuring, Benchmarking, and Improving Performance  

E-Print Network [OSTI]

and P. Price, 2009. “Building Energy Information Systems:2011. Learning from buildings: technologies for measuring,Information to Improve Building Performance: A Study of

Arens, Edward; Brager, Gail; Goins, John; Lehrer, David

2011-01-01T23:59:59.000Z

71

FY 2010 Overall Contract and Project Management Improvement Performance  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"ClickPipelinesProvedDecember 2005DepartmentDecember U.S. Department- EnronAnnual PerformanceMetrics and

72

Improved Economic Performance Municipal Solid Waste Combustion Plants  

E-Print Network [OSTI]

Improved Economic Performance of Municipal Solid Waste Combustion Plants by Model Based Combustion Control #12;#12;Improved Economic Performance of Municipal Solid Waste Combustion Plants by Model Based-of-the-art and challenges in the operation of MSWC plants . . . 1 1.1.1 The aims of municipal solid waste combustion

Van den Hof, Paul

73

Long-term average performance benefits of parabolic trough improvements  

SciTech Connect (OSTI)

Improved parabolic trough concentrating collectors will result from better design, improved fabrication techniques, and the development and utilization of improved materials. The difficulty of achieving these improvements varies as does their potential for increasing parabolic trough performance. The purpose of this analysis is to quantify the relative merit of various technology advancements in improving the long-term average performance of parabolic trough concentrating collectors. The performance benefits of improvements are determined as a function of operating temperature for north-south, east-west, and polar mounted parabolic troughs. The results are presented graphically to allow a quick determination of the performance merits of particular improvements. Substantial annual energy gains are shown to be attainable. Of the improvements evaluated, the development of stable back-silvered glass reflective surfaces offers the largest performance gain for operating temperatures below 150/sup 0/C. Above 150/sup 0/C, the development of trough receivers that can maintain a vacuum is the most significant potential improvement. The reduction of concentrator slope errors also has a substantial performance benefit at high operating temperatures.

Gee, R.; Gaul, H.W.; Kearney, D.; Rabl, A.

1980-03-01T23:59:59.000Z

74

SPECIFICATION AND IMPLEMENTATION OF IFC BASED PERFORMANCE METRICS TO SUPPORT BUILDING LIFE CYCLE ASSESSMENT OF HYBRID  

E-Print Network [OSTI]

with the introduction of tighter building codes have done little to stem the poor energy performance in commercial on owners to quantify the energy usage of their buildings against benchmarks set by government energy (LBNL), Berkeley, CA, USA ABSTRACT Minimising building life cycle energy consumption is becoming

75

Commercial Building Energy Baseline Modeling Software: Performance Metrics and Method Testing with Open Source Models and Implications for Proprietary Software Testing  

SciTech Connect (OSTI)

The overarching goal of this work is to advance the capabilities of technology evaluators in evaluating the building-level baseline modeling capabilities of Energy Management and Information System (EMIS) software. Through their customer engagement platforms and products, EMIS software products have the potential to produce whole-building energy savings through multiple strategies: building system operation improvements, equipment efficiency upgrades and replacements, and inducement of behavioral change among the occupants and operations personnel. Some offerings may also automate the quantification of whole-building energy savings, relative to a baseline period, using empirical models that relate energy consumption to key influencing parameters, such as ambient weather conditions and building operation schedule. These automated baseline models can be used to streamline the whole-building measurement and verification (M&V) process, and therefore are of critical importance in the context of multi-measure whole-building focused utility efficiency programs. This report documents the findings of a study that was conducted to begin answering critical questions regarding quantification of savings at the whole-building level, and the use of automated and commercial software tools. To evaluate the modeling capabilities of EMIS software particular to the use case of whole-building savings estimation, four research questions were addressed: 1. What is a general methodology that can be used to evaluate baseline model performance, both in terms of a) overall robustness, and b) relative to other models? 2. How can that general methodology be applied to evaluate proprietary models that are embedded in commercial EMIS tools? How might one handle practical issues associated with data security, intellectual property, appropriate testing ‘blinds’, and large data sets? 3. How can buildings be pre-screened to identify those that are the most model-predictable, and therefore those whose savings can be calculated with least error? 4. What is the state of public domain models, that is, how well do they perform, and what are the associated implications for whole-building measurement and verification (M&V)? Additional project objectives that were addressed as part of this study include: (1) clarification of the use cases and conditions for baseline modeling performance metrics, benchmarks and evaluation criteria, (2) providing guidance for determining customer suitability for baseline modeling, (3) describing the portfolio level effects of baseline model estimation errors, (4) informing PG&E’s development of EMIS technology product specifications, and (5) providing the analytical foundation for future studies about baseline modeling and saving effects of EMIS technologies. A final objective of this project was to demonstrate the application of the methodology, performance metrics, and test protocols with participating EMIS product vendors.

Price, Phillip N.; Granderson, Jessica; Sohn, Michael; Addy, Nathan; Jump, David

2013-09-01T23:59:59.000Z

76

Efficient Materialization of Dynamic Web Data to Improve Web Performance  

E-Print Network [OSTI]

Efficient Materialization of Dynamic Web Data to Improve Web Performance Christos Bouras, Agisilaos of performance, response efficiency and data consistency are among the most important ones for data intensive Web a materialization policy that may be applied to data intensive Web sites. Our research relies on the performance

Bouras, Christos

77

Toward resilient high performance applications through real time reliability metric generaion and autonomous failure correction  

SciTech Connect (OSTI)

One predominant barrier encountered in furthering research and development efforts aimed at facilitating resilient HPC applications is a substantial lack of existing reliability and performance data originating from extreme-scale computing distributions. In order to develop an understanding of how and why highly scaled HPC applications are encountering increasingly frequent performance interruptions, one must conduct extensive trending and analysis on contemporary machines and their associated programs. However, existing HPC application log files are labyrinthine documents that, even with the assistance of intelligent data mining algorithms, translate poorly to human discern. In addition, conventional log filtering, processes are limited to execution within a post-mortem, reactive time period, as the enormous size of these documents prevents efficient real time interaction. Thus, there exists a strong need within the HPC field for the provision of accurate-yet-concise real time application information. Moreover, the means of reporting this data must be sufficiently lightweight and non-intrusive, as to successfully-yet-discretely attach itself to the multiple processes running on multiple cores within tens (or in some cases, hundreds) of thousands of compute nodes. Furthermore, this information should in turn be used to facilitate the autonomous correction of application-threatening faults, suspensions, and interruptions. This paper describes a dynamic application instrumentation module (utilizing a combination of Open/SpeedShop software and custom scripting) aimed at successfully achieving these goals.

Debardeleben, Nathan [Los Alamos National Laboratory; Chandler, Clayton [Los Alamos National Laboratory; Leangsuksun, Chokchai [LOUISIANA TECH UNIV

2009-01-01T23:59:59.000Z

78

Lithium-Titanium-Oxide Anodes Improve Battery Safety and Performance...  

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

Lithium-Titanium-Oxide Anodes Improve Battery Safety and Performance Technology available for licensing: Li4Ti5O12 spinel is a promising alternative to graphite electrodes with...

79

Using Building Commissioning to Improve Performance in State Buildings  

E-Print Network [OSTI]

Using the commissioning process, states are beginning to improve and optimize their existing building stock as well as ensure that their new construction projects perform according to design. This paper reports on the progress a number of states...

Haasl, T.; Wilkinson, R.

1998-01-01T23:59:59.000Z

80

Storage Performance-Metrics and Benchmarks PETER M. CHEN AND DAVID A. PAmRSON, FELLOW, IEEE  

E-Print Network [OSTI]

evolution,disk arrays, and solid-state disks. Wethen describe, review,and run today'spopular I/O benchmarksOS, and an HP Series 700(Model 730)running HP-UX. Wealso describe two new appmaches to storage benchmarks component-further CPU performance improvements will be wasted [I]. In light of this developing trend toward

Chen, Peter M.

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Surveillance metrics sensitivity study.  

SciTech Connect (OSTI)

In September of 2009, a Tri-Lab team was formed to develop a set of metrics relating to the NNSA nuclear weapon surveillance program. The purpose of the metrics was to develop a more quantitative and/or qualitative metric(s) describing the results of realized or non-realized surveillance activities on our confidence in reporting reliability and assessing the stockpile. As a part of this effort, a statistical sub-team investigated various techniques and developed a complementary set of statistical metrics that could serve as a foundation for characterizing aspects of meeting the surveillance program objectives. The metrics are a combination of tolerance limit calculations and power calculations, intending to answer level-of-confidence type questions with respect to the ability to detect certain undesirable behaviors (catastrophic defects, margin insufficiency defects, and deviations from a model). Note that the metrics are not intended to gauge product performance but instead the adequacy of surveillance. This report gives a short description of four metrics types that were explored and the results of a sensitivity study conducted to investigate their behavior for various inputs. The results of the sensitivity study can be used to set the risk parameters that specify the level of stockpile problem that the surveillance program should be addressing.

Hamada, Michael S. (Los Alamos National Laboratory); Bierbaum, Rene Lynn; Robertson, Alix A. (Lawrence Livermore Laboratory)

2011-09-01T23:59:59.000Z

82

Surveillance Metrics Sensitivity Study  

SciTech Connect (OSTI)

In September of 2009, a Tri-Lab team was formed to develop a set of metrics relating to the NNSA nuclear weapon surveillance program. The purpose of the metrics was to develop a more quantitative and/or qualitative metric(s) describing the results of realized or non-realized surveillance activities on our confidence in reporting reliability and assessing the stockpile. As a part of this effort, a statistical sub-team investigated various techniques and developed a complementary set of statistical metrics that could serve as a foundation for characterizing aspects of meeting the surveillance program objectives. The metrics are a combination of tolerance limit calculations and power calculations, intending to answer level-of-confidence type questions with respect to the ability to detect certain undesirable behaviors (catastrophic defects, margin insufficiency defects, and deviations from a model). Note that the metrics are not intended to gauge product performance but instead the adequacy of surveillance. This report gives a short description of four metrics types that were explored and the results of a sensitivity study conducted to investigate their behavior for various inputs. The results of the sensitivity study can be used to set the risk parameters that specify the level of stockpile problem that the surveillance program should be addressing.

Bierbaum, R; Hamada, M; Robertson, A

2011-11-01T23:59:59.000Z

83

Current performance and potential improvements in solar thermal industrial heat  

SciTech Connect (OSTI)

A representive current state-of-the-art system using parabolic trough technology was developed using data from a system recently installed in Tehachapi, California. A simulation model was used to estimate the annual energy output from the system at three different insolation locations. Based on discussions with industry personnel and within NREL, we identified a number of technology improvements that offer the potential for increasing the energy performance and reducing the energy-cost of the baseline system. The technology improvements modeled included an evacuated-tube receiver, an antireflective coating on the receiver tube, an improved absorber material, a cleaner reflecting surface, a reflecting surface that can withstand contact cleaning, and two silver reflectors. The properties associated with the improvements were incorporated into the model simulation at the three insolation locations to determine if there were any performance gains. The results showed that there was a potential for a more am 50% improvement in the annual energy delivered by a 2677 m{sup 2} system incorporating a combination of the enumerated technology improvements. We discuss the commercial and technological status of each design improvement and present performance predictions for the trough-design improvements.

Hale, M.J.; Williams, T.; Barker, G.

1992-12-01T23:59:59.000Z

84

Current performance and potential improvements in solar thermal industrial heat  

SciTech Connect (OSTI)

A representive current state-of-the-art system using parabolic trough technology was developed using data from a system recently installed in Tehachapi, California. A simulation model was used to estimate the annual energy output from the system at three different insolation locations. Based on discussions with industry personnel and within NREL, we identified a number of technology improvements that offer the potential for increasing the energy performance and reducing the energy-cost of the baseline system. The technology improvements modeled included an evacuated-tube receiver, an antireflective coating on the receiver tube, an improved absorber material, a cleaner reflecting surface, a reflecting surface that can withstand contact cleaning, and two silver reflectors. The properties associated with the improvements were incorporated into the model simulation at the three insolation locations to determine if there were any performance gains. The results showed that there was a potential for a more am 50% improvement in the annual energy delivered by a 2677 m[sup 2] system incorporating a combination of the enumerated technology improvements. We discuss the commercial and technological status of each design improvement and present performance predictions for the trough-design improvements.

Hale, M.J.; Williams, T.; Barker, G.

1992-12-01T23:59:59.000Z

85

Measurable Control System Security through Ideal Driven Technical Metrics  

SciTech Connect (OSTI)

The Department of Homeland Security National Cyber Security Division supported development of a small set of security ideals as a framework to establish measurable control systems security. Based on these ideals, a draft set of proposed technical metrics was developed to allow control systems owner-operators to track improvements or degradations in their individual control systems security posture. The technical metrics development effort included review and evaluation of over thirty metrics-related documents. On the bases of complexity, ambiguity, or misleading and distorting effects the metrics identified during the reviews were determined to be weaker than necessary to aid defense against the myriad threats posed by cyber-terrorism to human safety, as well as to economic prosperity. Using the results of our metrics review and the set of security ideals as a starting point for metrics development, we identified thirteen potential technical metrics - with at least one metric supporting each ideal. Two case study applications of the ideals and thirteen metrics to control systems were then performed to establish potential difficulties in applying both the ideals and the metrics. The case studies resulted in no changes to the ideals, and only a few deletions and refinements to the thirteen potential metrics. This led to a final proposed set of ten core technical metrics. To further validate the security ideals, the modifications made to the original thirteen potential metrics, and the final proposed set of ten core metrics, seven separate control systems security assessments performed over the past three years were reviewed for findings and recommended mitigations. These findings and mitigations were then mapped to the security ideals and metrics to assess gaps in their coverage. The mappings indicated that there are no gaps in the security ideals and that the ten core technical metrics provide significant coverage of standard security issues with 87% coverage. Based on the two case studies and evaluation of the seven assessments, the security ideals demonstrated their value in guiding security thinking. Further, the final set of core technical metrics has been demonstrated to be both usable in the control system environment and provide significant coverage of standard security issues.

Miles McQueen; Wayne Boyer; Sean McBride; Marie Farrar; Zachary Tudor

2008-01-01T23:59:59.000Z

86

Turbine Steam Path Audits for Improved Performance and Profitability  

E-Print Network [OSTI]

TURBINE STEAM PATH AUDITS FOR IMPROVED PERFORMANCE AND PROFITABILITY PAUL E. BABSON, DIRECTOR, BUSINESS DEVELOPMENT, ENCOTECH, INC., SCHENECTADY, NEW YORK ABSTRACT This paper describes the use and value of conducting steam path audits... in turbines. Critical measurements and observations made during overhaul identify and quantify the effects of component degradations upon turbine performance as compared to design conditions. The information generated permits performance oriented repair...

Babson, P. E.

87

ASR - 2011 Performance Metrics  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUCProductstwrmrAre the Effects of GlobalASCR User Facilities UserASDSystem

88

Implementing the Data Center Energy Productivity Metric  

SciTech Connect (OSTI)

As data centers proliferate in both size and number, their energy efficiency is becoming increasingly important. We discuss the properties of a number of the proposed metrics of energy efficiency and productivity. In particular, we focus on the Data Center Energy Productivity (DCeP) metric, which is the ratio of useful work produced by the data center to the energy consumed performing that work. We describe our approach for using DCeP as the principal outcome of a designed experiment using a highly instrumented, high performance computing data center. We found that DCeP was successful in clearly distinguishing between different operational states in the data center, thereby validating its utility as a metric for identifying configurations of hardware and software that would improve (or even maximize) energy productivity. We also discuss some of the challenges and benefits associated with implementing the DCeP metric, and we examine the efficacy of the metric in making comparisons within a data center and among data centers.

Sego, Landon H.; Marquez, Andres; Rawson, Andrew; Cader, Tahir; Fox, Kevin M.; Gustafson, William I.; Mundy, Christopher J.

2012-10-01T23:59:59.000Z

89

Enhanced Accident Tolerant LWR Fuels: Metrics Development  

SciTech Connect (OSTI)

The Department of Energy (DOE) Fuel Cycle Research and Development (FCRD) Advanced Fuels Campaign (AFC) is conducting research and development on enhanced Accident Tolerant Fuels (ATF) for light water reactors (LWRs). This mission emphasizes the development of novel fuel and cladding concepts to replace the current zirconium alloy-uranium dioxide (UO2) fuel system. The overall mission of the ATF research is to develop advanced fuels/cladding with improved performance, reliability and safety characteristics during normal operations and accident conditions, while minimizing waste generation. The initial effort will focus on implementation in operating reactors or reactors with design certifications. To initiate the development of quantitative metrics for ATR, a LWR Enhanced Accident Tolerant Fuels Metrics Development Workshop was held in October 2012 in Germantown, MD. This paper summarizes the outcome of that workshop and the current status of metrics development for LWR ATF.

Shannon Bragg-Sitton; Lori Braase; Rose Montgomery; Chris Stanek; Robert Montgomery; Lance Snead; Larry Ott; Mike Billone

2013-09-01T23:59:59.000Z

90

Potential improvements in SiGe radioisotope thermoelectric generator performance  

SciTech Connect (OSTI)

In accordance with NASA{close_quote}s slogan: {open_quotes}Better, Cheaper, Faster,{close_quotes} this paper will address potential improvements to SiGe RTG technology to make them Better. RTGs are doubtless cheaper than {open_quotes}paper designs{close_quotes} which are better and cheaper until development, performance and safety test costs are considered. RTGs have the advantage of being fully developed and tested in the rigors of space for over twenty years. Further, unless a new system can be accelerated tested, as were the RTGs, they cannot be deployed reliably unless a number of systems have succeeded for test periods exceeding the mission lifetime. Two potential developments are discussed that can improve the basic RTG performance by 10 to 40{sup +}{percent} depending on the mission profile. These improvements could be demonstrated in years. Accelerated testing could also be performed in this period to preserve existing RTG reliability. Data from a qualification tested RTG will be displayed, while not definitive, to support the conclusions. Finally, it is anticipated that other investigators will be encouraged to suggest further modifications to the basic RTG design to improve its performance. {copyright} {ital 1999 American Institute of Physics.}

Mowery, A.L. [4 Myrtle Bank Lane, Hilton Head Island, South Carolina, 29926-2650 (United States)

1999-01-01T23:59:59.000Z

91

Nitrogen modification of highly porous carbon for improved supercapacitor performance  

E-Print Network [OSTI]

Nitrogen modification of highly porous carbon for improved supercapacitor performance Stephanie L for supercapacitor applications. Surface modification increases the amount of nitrogen by four times when compared elements in highly porous carbon used for electric double-layer supercapacitors.1 These elements modify

Cao, Guozhong

92

FY 2013 Performance Evaluation Report Sandia Corporation, Contract...  

National Nuclear Security Administration (NNSA)

Management System (FIMS) performance metrics, and exceeded targets for fleet fuel, energy, and water intensity reduction. Sandia also made significant improvement with...

93

New MEA Materials for Improved DMFC Performance, Durability and Cost  

SciTech Connect (OSTI)

Abstract Project Title: New MEA Materials for Improved DMFC Performance, Durability and Cost The University of North Florida (UNF)--with project partners the University of Florida, Northeastern University, and Johnson Matthey--has recently completed the Department of Energy (DOE) project entitled “New MEA Materials for Improved DMFC Performance, Durability and Cost”. The primary objective of the project was to advance portable fuel cell MEA technology towards the commercial targets as laid out in the DOE R&D roadmap by developing a passive water recovery MEA (membrane electrode assembly). Developers at the University of North Florida identified water management components as an insurmountable barrier to achieving the required system size and weight necessary to achieve the energy density requirements of small portable power applications. UNF developed an innovative “passive water recovery” MEA for direct methanol fuel cells (DMFC) which provides a path to system simplification and optimization. The passive water recovery MEA incorporates a hydrophobic, porous, barrier layer within the cathode electrode, so that capillary pressure forces the water produced at the cathode through holes in the membrane and back to the anode. By directly transferring the water from the cathode to the anode, the balance of plant is very much simplified and the need for heavy, bulky water recovery components is eliminated. At the heart of the passive water recovery MEA is the UNF DM-1 membrane that utilizes a hydrocarbon structure to optimize performance in a DMFC system. The membrane has inherent performance advantages, such as a low methanol crossover (high overall efficiency), while maintaining a high proton conductivity (good electrochemical efficiency) when compared to perfluorinated sulfonic acid membranes such as Nafion. Critically, the membrane provides an extremely low electro-osmotic drag coefficient of approximately one water molecule per proton (versus the 2-3 for Nafion) that minimizes flooding issues at the cathode, which often fatally limit open cathode MEA performance. During this successfully completed DOE program the project team met all of the project goals. The team built and tested over 1,500 MEAs with a wide range of different manufacturing chemistries and process conditions. This project demonstrated that the UNF MEA design could be fabricated with a high degree of reproducibility and repeatability. Some specific achievements include: • Durability - The UNF MEA has demonstrated over 11,000 hours continuous operation in a short stack configuration. The root cause of an off-state degradation issue was successfully mitigated by modifying the manufacturing process by changing the wetting agents used in the catalyst printing. The stability of the anode electrode was increased by replacing the anode electrodes with a stabilized PtRu/C catalyst. The overall degradation rate was significantly reduced through optimization of the MEA operating conditions. • Performance - The project team optimized the performance of the critical MEA sub-components. By increasing the membrane thickness, the methanol crossover was reduced, thereby increasing the fuel utilization efficiency without sacrificing any electrochemical performance. The reduction in methanol crossover increased the fuel utilization efficiency from 78% to over 90%. The liquid barrier layer was optimized to provide improved reproducibility, thereby improving stack voltage uniformity and reliability. Additionally the barrier layer water permeability was lowered without sacrificing any power density, thereby enabling increased operating temperature. Improvements in the cathode catalyst selection and coating provided an additional 10% to 20% improvement in the MEA performance at the target operating range. • Cost - Commercially scalable processes were developed for all of the critical MEA components which led to improved yields and lower overall manufacturing costs. Furthermore, significant steps have been made in improving the process control, which increases MEA

Fletcher, James H. [University of North Florida; Campbell, Joseph L. [University of North Florida; Cox, Philip [University of North Florida; Harrington, William J. [University of North Florida

2013-09-16T23:59:59.000Z

94

Metrics for Evaluating the Accuracy of Solar Power Forecasting (Presentation)  

SciTech Connect (OSTI)

This presentation proposes a suite of metrics for evaluating the performance of solar power forecasting.

Zhang, J.; Hodge, B.; Florita, A.; Lu, S.; Hamann, H.; Banunarayanan, V.

2013-10-01T23:59:59.000Z

95

Adaptive optics simulation performance improvements using reconfigurable logic  

E-Print Network [OSTI]

A technique used to accelerate an adaptive optics simulation platform using reconfigurable logic is described. The performance of parts of this simulation have been improved by up to 600 times (reducing computation times by this factor) by implementing algorithms within hardware and enables adaptive optics simulations to be carried out in a reasonable timescale. This demonstrates that it is possible to use reconfigurable logic to accelerate computational codes by very large factors when compared with conventional software approaches, and this has relevance for many computationally intensive applications. The use of reconfigurable logic for high performance computing is currently in its infancy and has never before been applied to this field.

Alastair Basden

2006-11-09T23:59:59.000Z

96

Performance improvement plan use in implementing conduct of operations  

SciTech Connect (OSTI)

The Nuclear Materials Processing and Waste Management and Environmental Restoration Divisions (NMPD/WMER) of the Westinghouse Savannah River Company (WSRC) operate nineteen individual facilities at Savannah River Site (SRS). These facilities produce the fuel and target assemblies for the SRS Reactors: extract Tritium, Plutonium, Uranium and other isotopes from the irradiated fuel and targets; safely store the radioactive waste from ongoing operations; and encapsulate the waste in a final waste form for long term disposal. Continuous improvement in the operation of all facilities and in the conduct of business at SRS is the goal embodied in the NMPD/WMER Performance Improvement Plan (PIP) discussed in this document. The NMPD/WMER PIP is the mechanism used to establish a basis for operations that will lead to achievement of a performance level that will meet or exceed the standards developed and used in the commercial nuclear power industry.

Baumhardt, R.J.

1992-06-01T23:59:59.000Z

97

Performance improvement plan use in implementing conduct of operations  

SciTech Connect (OSTI)

The Nuclear Materials Processing and Waste Management and Environmental Restoration Divisions (NMPD/WMER) of the Westinghouse Savannah River Company (WSRC) operate nineteen individual facilities at Savannah River Site (SRS). These facilities produce the fuel and target assemblies for the SRS Reactors: extract Tritium, Plutonium, Uranium and other isotopes from the irradiated fuel and targets; safely store the radioactive waste from ongoing operations; and encapsulate the waste in a final waste form for long term disposal. Continuous improvement in the operation of all facilities and in the conduct of business at SRS is the goal embodied in the NMPD/WMER Performance Improvement Plan (PIP) discussed in this document. The NMPD/WMER PIP is the mechanism used to establish a basis for operations that will lead to achievement of a performance level that will meet or exceed the standards developed and used in the commercial nuclear power industry.

Baumhardt, R.J.

1992-01-01T23:59:59.000Z

98

Performance improvement of direct- and indirect-fired heaters  

SciTech Connect (OSTI)

The operating performance of direct and indirect heaters is discussed, and principles and guidelines that can be applied to effect improvements in efficiency are presented. This paper also discusses the associated heater efficiencies and several useful operating techniques to approach the maximum, steady-state heater efficiency. The techniques presented apply to all types of direct-and indirect-fired heaters: salt bath heaters, propane vaporizers, heater/treaters, production heaters, and glycol and amine regenerators.

Sams, G.W.; Hunter, J.D.

1988-08-01T23:59:59.000Z

99

Improving Fan System Performance - A Sourcebook for Industry  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe U.S. Improving Fan System Performance a sourcebook for

100

Improving Pumping System Performance: A Sourcebook for Industry, Second Edition  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe U.S. Improving Fan System Performance a Pumping System

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Improving Dynamic Load and Generator Response PerformanceTools  

SciTech Connect (OSTI)

This report is a scoping study to examine research opportunities to improve the accuracy of the system dynamic load and generator models, data and performance assessment tools used by CAISO operations engineers and planning engineers, as well as those used by their counterparts at the California utilities, to establish safe operating margins. Model-based simulations are commonly used to assess the impact of credible contingencies in order to determine system operating limits (path ratings, etc.) to ensure compliance with NERC and WECC reliability requirements. Improved models and a better understanding of the impact of uncertainties in these models will increase the reliability of grid operations by allowing operators to more accurately study system voltage problems and the dynamic stability response of the system to disturbances.

Lesieutre, Bernard C.

2005-11-01T23:59:59.000Z

102

Improving Fatigue Performance of AHSS Welds | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe U.S. Improving Fan System Performance a sourcebook forFatigue

103

Improvements in EMC performance of inverter-fed motor drives  

SciTech Connect (OSTI)

An experimental investigation of conducted radio-noise emission from a conventional pulse width modulated (PWM) inverter of medium power feeding an induction motor is described. It is determined that the inverter system generates considerable impulse currents through the power leads feeding the system resulting in serious conducted electromagnetic interference (EMI) problems and significant voltage waveform distortion in the power system. The dominant emission sources in the system are identified. A proposed model of the drive system for the purpose of evaluation of EMI are developed. Several low-cost strategies for improvement in EMC performance of the PWM inverter are then proposed. Experimental results demonstrate that disturbance from the modified system can be dramatically reduced and that the EMC performance of the system has come very close to meeting the IEC CISPR and FCC limits on conducted emissions for digital devices.

Zhong, E.; Lipo, T.A. [Univ. of Wisconsin, Madison, WI (United States). Dept. of Electrical and Computer Engineering

1995-11-01T23:59:59.000Z

104

Plasma Aerodynamic Control Effectors for Improved Wind Turbine Performance  

SciTech Connect (OSTI)

Orbital Research Inc is developing an innovative Plasma Aerodynamic Control Effectors (PACE) technology for improved performance of wind turbines. The PACE system is aimed towards the design of "smart" rotor blades to enhance energy capture and reduce aerodynamic loading and noise using flow-control. The PACE system will provide ability to change aerodynamic loads and pitch distribution across the wind turbine blade without any moving surfaces. Additional benefits of the PACE system include reduced blade structure weight and complexity that should translate into a substantially reduced initial cost. During the Phase I program, the ORI-UND Team demonstrated (proof-of-concept) performance improvements on select rotor blade designs using PACE concepts. Control of both 2-D and 3-D flows were demonstrated. An analytical study was conducted to estimate control requirements for the PACE system to maintain control during wind gusts. Finally, independent laboratory experiments were conducted to identify promising dielectric materials for the plasma actuator, and to examine environmental effects (water and dust) on the plasma actuator operation. The proposed PACE system will be capable of capturing additional energy, and reducing aerodynamic loading and noise on wind turbines. Supplementary benefits from the PACE system include reduced blade structure weight and complexity that translates into reduced initial capital costs.

Mehul P. Patel; Srikanth Vasudevan; Robert C. Nelson; Thomas C. Corke

2008-08-01T23:59:59.000Z

105

Continuous improvement of the MHTGR safety and competitive performance  

SciTech Connect (OSTI)

An increase in reactor module power from 350 to 450 MW(t) would markedly improve the economics of the Modular High Temperature Gas-Cooled Reactor (MHTGR). The higher power level was recommended as the result of an in-depth cost reduction study undertaken to compete with the declining price of fossil fuel. The safety assessment confirms that the high level of safety, which relies on inherent characteristics and passive features, is maintained at the elevated power level. Preliminary systems, nuclear, and safety performance results are discussed for the recommended 450 MW(t) design. Optimization of plant parameters and design modifications accommodated the operation of the steam generator and circulator at the higher power level. Events in which forced cooling is lost, designated as conduction cooldowns are described in detail. For the depressurized conduction cooldown, without full helium inventory, peak fuel temperatures are significantly lowered. A more negative temperature coefficient of reactivity was achieved while maintaining an adequate fuel cycle and reactivity control. Continual improvement of the MHTGR delivers competitive performance without relinquishing the high safety margins demanded of the next generation of power plants.

Eichenberg, T.W.; Etzel, K.T.; Mascaro, L.L.; Rucker, R.A.

1992-05-01T23:59:59.000Z

106

Improving Emergency Response and Human-Robotic Performance  

SciTech Connect (OSTI)

Preparedness for chemical, biological, and radiological/nuclear incidents at nuclear power plants (NPPs) includes the deployment of well trained emergency response teams. While teams are expected to do well, data from other domains suggests that the timeliness and accuracy associated with incident response can be improved through collaborative human-robotic interaction. Many incident response scenarios call for multiple, complex procedure-based activities performed by personnel wearing cumbersome personal protective equipment (PPE) and operating under high levels of stress and workload. While robotic assistance is postulated to reduce workload and exposure, limitations associated with communications and the robot’s ability to act independently have served to limit reliability and reduce our potential to exploit human –robotic interaction and efficacy of response. Recent work at the Idaho National Laboratory (INL) on expanding robot capability has the potential to improve human-system response during disaster management and recovery. Specifically, increasing the range of higher level robot behaviors such as autonomous navigation and mapping, evolving new abstractions for sensor and control data, and developing metaphors for operator control have the potential to improve state-of-the-art in incident response. This paper discusses these issues and reports on experiments underway intelligence residing on the robot to enhance emergency response.

David I. Gertman; David J. Bruemmer; R. Scott Hartley

2007-08-01T23:59:59.000Z

107

Performance improvement options for the supercritical carbon dioxide brayton cycle.  

SciTech Connect (OSTI)

The supercritical carbon dioxide (S-CO{sub 2}) Brayton cycle is under development at Argonne National Laboratory as an advanced power conversion technology for Sodium-Cooled Fast Reactors (SFRs) as well as other Generation IV advanced reactors as an alternative to the traditional Rankine steam cycle. For SFRs, the S-CO{sub 2} Brayton cycle eliminates the need to consider sodium-water reactions in the licensing and safety evaluation, reduces the capital cost of the SFR plant, and increases the SFR plant efficiency. Even though the S-CO{sub 2} cycle has been under development for some time and optimal sets of operating parameters have been determined, those earlier development and optimization studies have largely been directed at applications to other systems such as gas-cooled reactors which have higher operating temperatures than SFRs. In addition, little analysis has been carried out to investigate cycle configurations deviating from the selected 'recompression' S-CO{sub 2} cycle configuration. In this work, several possible ways to improve S-CO{sub 2} cycle performance for SFR applications have been identified and analyzed. One set of options incorporates optimization approaches investigated previously, such as variations in the maximum and minimum cycle pressure and minimum cycle temperature, as well as a tradeoff between the component sizes and the cycle performance. In addition, the present investigation also covers options which have received little or no attention in the previous studies. Specific options include a 'multiple-recompression' cycle configuration, intercooling and reheating, as well as liquid-phase CO{sub 2} compression (pumping) either by CO{sub 2} condensation or by a direct transition from the supercritical to the liquid phase. Some of the options considered did not improve the cycle efficiency as could be anticipated beforehand. Those options include: a double recompression cycle, intercooling between the compressor stages, and reheating between the turbine stages. Analyses carried out as part of the current investigation confirm the possibilities of improving the cycle efficiency that have been identified in previous investigations. The options in this group include: increasing the heat exchanger and turbomachinery sizes, raising of the cycle high end pressure (although the improvement potential of this option is very limited), and optimization of the low end temperature and/or pressure to operate as close to the (pseudo) critical point as possible. Analyses carried out for the present investigation show that significant cycle performance improvement can sometimes be realized if the cycle operates below the critical temperature at its low end. Such operation, however, requires the availability of a heat sink with a temperature lower than 30 C for which applicability of this configuration is dependent upon the climate conditions where the plant is constructed (i.e., potential performance improvements are site specific). Overall, it is shown that the S-CO{sub 2} Brayton cycle efficiency can potentially be increased to 45 %, if a low temperature heat sink is available and incorporation of larger components (e.g.., heat exchangers or turbomachinery) having greater component efficiencies does not significantly increase the overall plant cost.

Moisseytsev, A.; Sienicki, J. J.; Nuclear Engineering Division

2008-07-17T23:59:59.000Z

108

Daylight metrics and energy savings J. Mardaljevic  

E-Print Network [OSTI]

LBNL-4585E Daylight metrics and energy savings Authors: J. Mardaljevic Institute of Energy 2009; 0: 1­23 ! Daylight metrics and energy savings J. Mardaljevic a , L. Heschong b , E.S. Lee c comfort performance. Current metrics do not account for the temporal and spatial aspects of daylight, nor

109

Advanced Energy Retrofit Guide (AERG): Practical Ways to Improve Energy Performance; Healthcare Facilities (Book)  

SciTech Connect (OSTI)

The Advanced Energy Retrofit Guide for Healthcare Facilities is part of a series of retrofit guides commissioned by the U.S. Department of Energy. By presenting general project planning guidance as well as detailed descriptions and financial payback metrics for the most important and relevant energy efficiency measures (EEMs), the guides provide a practical roadmap for effectively planning and implementing performance improvements in existing buildings. The Advanced Energy Retrofit Guides (AERGs) are intended to address key segments of the U.S. commercial building stock: retail stores, office buildings, K-12 schools, grocery stores, and healthcare facilities. The guides' general project planning considerations are applicable nationwide; the energy and cost savings estimates for recommended EEMs were developed based on energy simulations and cost estimates for an example hospital tailored to five distinct climate regions. These results can be extrapolated to other U.S. climate zones. Analysis is presented for individual EEMs, and for packages of recommended EEMs for two project types: existing building commissioning projects that apply low-cost and no-cost measures, and whole-building retrofits involving more capital-intensive measures.

Hendron, R.; Leach, M.; Bonnema, E.; Shekhar, D.; Pless, S.

2013-09-01T23:59:59.000Z

110

Normalization of Process Safety Metrics  

E-Print Network [OSTI]

and organizational risks, there is an emerging need to evaluate the process safety implementation across an organization through measurements. Thus, the process safety metric is applied as a powerful tool that measures safety activities, status, and performance...

Wang, Mengtian

2012-10-19T23:59:59.000Z

111

IMPROVING CONSISTENCY OF PERFORMANCE ASSESSMENTS IN THE DOE COMPLEX  

SciTech Connect (OSTI)

The low-level waste (LLW) performance assessment (PA) process has been traditionally focused on disposal facilities at a few United States Department of Energy (USDOE) sites and commercial disposal facilities. In recent years, there has been a dramatic increase in the scope of the use of PA-like modeling approaches, involving multiple activities, facilities, contractors and regulators. The scope now includes, for example: (1) National Environmental Policy Act (NEPA) assessments, (2) CERCLA disposal cells, (3) Waste Determinations and High-Level Waste (HLW) Closure activities, (4) Potential on-site disposal of Transuranic (TRU) waste, and (5) In-situ decommissioning (including potential use of existing facilities for disposal). The dramatic increase in the variety of activities requiring more detailed modeling has resulted in a similar increase in the potential for inconsistency in approaches both at a site and complexwide scale. This paper includes a summary of USDOE Environmental Management (EM) sponsored initiatives and activities for improved consistency. New initiatives entitled the Performance Assessment Community of Practice and Performance Assessment Assistance Team are also introduced.

Seitz, R; Elmer Wilhite, E

2009-01-20T23:59:59.000Z

112

Development of improved performance refractory liner materials for slagging gasifiers  

SciTech Connect (OSTI)

Refractory liners for slagging gasifiers used in power generation, chemical production, or as a possible future source of hydrogen for a hydrogen based economy, suffer from a short service life. These liner materials are made of high Cr2O3 and lower levels of Al2O3 and/or ZrO2. As a working face lining in the gasifier, refractories are exposed to molten slags at elevated temperature that originate from ash in the carbon feedstock, including coal and/or petroleum coke. The molten slag causes refractory failure by corrosion dissolution and by spalling. The Albany Research Center is working to improve the performance of Cr2O3 refractories and to develop refractories without Cr2O3 or with Cr2O3 content under 30 wt pct. Research on high Cr2O3 materials has resulted in an improved refractory with phosphate additions that is undergoing field testing. Results to date of field trials, along with research direction on refractories with no or low Cr2O3, will be discussed.

Kwong, Kyei-Sing; Bennett, James P.; Powell, Cynthia; Thomas, Hugh; Krabbe, Rick

2005-01-01T23:59:59.000Z

113

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

Roadmap to Improved Energy Efficiency iii 11-Sept-2009 ListA Roadmap to Improved Energy Efficiency 11-Sept-2009 Topic /A Roadmap to Improved Energy Efficiency 11-Sept-2009 Topic /

Singer, Brett C.

2010-01-01T23:59:59.000Z

114

Continuous-time model reference adaptive control with improved transient performance  

E-Print Network [OSTI]

. . 10 3. 1. Introduction . . 3. 2. Performance of a Standard MRAC Scheme. . . . . . . . . 3. 3. Performance Improvement as Input Disturbance Rejection 3. 4. A Modified MRAC Scheme for Improved Transient Per- formance . 3. 5. Example and Simulations... 10 13 16 21 24 IV MODEL REFERENCE ADAPTIVE CONTROL OF RIGID ROBOTS WITH IMPROVED TRANSIENT PERFORMANCE 27 4. 1. Introduction 4. 2. Performance of a Standard MRAC Scheme for a Robotic Manipulator . 4. 3. Performance Improvement as Input...

Ho, Ming-Tzu

1993-01-01T23:59:59.000Z

115

COOLING FAN AND SYSTEM PERFORMANCE AND EFFICIENCY IMPROVEMENTS  

SciTech Connect (OSTI)

Upcoming emissions regulations (Tiers 3, 4a and 4b) are imposing significantly higher heat loads on the cooling system than lesser regulated machines. This work was a suite of tasks aimed at reducing the parasitic losses of the cooling system, or improving the design process through six distinct tasks: 1. Develop an axial fan that will provide more airflow, with less input power and less noise. The initial plan was to use Genetic Algorithms to do an automated fan design, incorporating forward sweep for low noise. First and second generation concepts could not meet either performance or sound goals. An experienced turbomachinery designer, using a specialized CFD analysis program has taken over the design and has been able to demonstrate a 5% flow improvement (vs 10% goal) and 10% efficiency improvement (vs 10% goal) using blade twist only. 2. Fan shroud developments, using an 'aeroshroud' concept developed at Michigan State University. Performance testing at Michigan State University showed the design is capable of meeting the goal of a 10% increase in flow, but over a very narrow operating range of fan performance. The goal of 10% increase in fan efficiency was not met. Fan noise was reduced from 0 to 2dB, vs. a goal of 5dB at constant airflow. The narrow range of fan operating conditions affected by the aeroshroud makes this concept unattractive for further development at this time 3. Improved axial fan system modeling is needed to accommodate the numbers of cooling systems to be redesigned to meet lower emissions requirements. A CFD fan system modeling guide has been completed and transferred to design engineers. Current, uncontrolled modeling practices produce flow estimates in some cases within 5% of measured values, and in some cases within 25% of measured values. The techniques in the modeling guide reduced variability to the goal of + 5% for the case under study. 4. Demonstrate the performance and design versatility of a high performance fan. A 'swept blade mixed flow' fan was rapid prototyped from cast aluminum for a performance demonstration on a small construction machine. The fan was mounted directly in place of the conventional fan (relatively close to the engine). The goal was to provide equal airflow at constant fan speed, with 75% of the input power and 5 dB quieter than the conventional fan. The result was a significant loss in flow with the prototype due to its sensitivity to downstream blockage. This sensitivity to downstream blockage affects flow, efficiency, and noise all negatively, and further development was terminated. 5. Develop a high efficiency variable speed fan drive to replace existing slipping clutch style fan drives. The goal for this task was to provide a continuously variable speed fan drive with an efficiency of 95%+ at max speed, and losses no greater than at max speed as the fan speed would vary throughout its entire speed range. The process developed to quantify the fuel savings potential of a variable speed fan drive has produced a simple tool to predict the fuel savings of a variable speed drive, and has sparked significant interest in the use of variable speed fan drive for Tier 3 emissions compliant machines. The proposed dual ratio slipping clutch variable speed fan drive can provide a more efficient system than a conventional single ratio slipping clutch fan drive, but could not meet the established performance goals of this task, so this task was halted in a gate review prior to the start of detailed design. 6. Develop a cooling system air filtration device to allow the use of automotive style high performance heat exchangers currently in off road machines. The goal of this task was to provide a radiator air filtration system that could allow high fin density, louvered radiators to operate in a find dust application with the same resistance to fouling as a current production off-road radiator design. Initial sensitivity testing demonstrated that fan speed has a significant impact on the fouling of radiator cores due to fine dusts, so machines equipped with continuously variabl

Ronald Dupree

2005-07-31T23:59:59.000Z

116

Recovery Act: Electrochromic Glazing Technology: Improved Performance, Lower Price  

SciTech Connect (OSTI)

The growing dependency of the US on energy imports and anticipated further increases in energy prices reinforce the concerns about meeting the energy demand in the future and one element of a secure energy future is conservation. It is estimated that the buildings sector represents 40% of the US's total energy consumption. And buildings produce as much as one third of the greenhouse gas emissions primarily through fossil fuel usage during their operational phase. A significant fraction of this energy usage is simply due to inefficient window technology. Electrochromic (EC) windows allow electronic control of their optical properties so that the transparency to light can be adjusted from clear to dark. This ability to control the amount of solar energy allowed into the building can be advantageously used to minimize lighting, heating and air conditioning costs. Currently, the penetration of EC windows into the marketplace is extremely small, and consequently there is a huge opportunity for energy savings if this market can be expanded. In order to increase the potential energy savings it is necessary to increase the quantity of EC windows in operation. Additionally, any incremental improvement in the energy performance of each window will add to the potential energy savings. The overall goals of this project were therefore to improve the energy performance and lower the cost of dynamic (EC) smart windows for residential and commercial building applications. This project is obviously of benefit to the public by addressing two major areas: lowering the cost and improving the energy performance of EC glazings. The high level goals for these activities were: (i) to improve the range between the clear and the tinted state, (ii) reduce the price of EC windows by utilizing lower cost materials, (iii) lowering the U-Value1 SAGE Electrochromics Inc. is the only company in the US which has a track record of producing EC windows, and presently has a small operational factory in Faribault MN which is shipping products throughout the world. There is a much larger factory currently under construction close by. This project was targeted specifically to address the issues outlined above, with a view to implementation on the new high volume manufacturing facility. Each of the Tasks which were addressed in this project is relatively straightforward to implement in this new facility and so the benefits of the work will be realized quickly. , and (iv) ensure the proposed changes have no detrimental effect to the proven durability of the window. The research described here has helped to understand and provide solutions to several interesting and previously unresolved issues of the technology as well as make progress in areas which will have a significant impact on energy saving. In particular several materials improvements have been made, and tasks related to throughput and yield improvements have been completed. All of this has been accomplished without any detrimental effect on the proven durability of the SageGlass EC device. The project was divided into four main areas: 1. Improvement of the Properties of the EC device by material enhancements (Task 2); 2. Reduce the cost of production by improving the efficiency and yields of some key manufacturing processes (Task 3); 3. Further reduce the cost by significant modifications to the structure of the device (Task 4); 4. Ensure the durability of the EC device is not affected by any of the changes resulting from these activities (Task 5). A detailed description of the activities carried out in these areas is given in the following report, along with the aims and goals of the work. We will see that we have completed Tasks 2 and 3 fully, and the durability of the resulting device structure has been unaffected. Some of Task 4 was not carried out because of difficulties with integrating the installation of the required targets into the production coater due to external constraints not related to this project. We will also see that the durability of the devices produced as a result of this work was

Burdis, Mark; Sbar, Neil

2012-06-30T23:59:59.000Z

117

Improved LWR Cladding Performance by EPD Surface Modification Technique  

SciTech Connect (OSTI)

This project will utilize the electro-phoretic deposition technique (EPD) in conjunction with nanofluids to deposit oxide coatings on prototypic zirconium alloy cladding surfaces. After demonstrating that this surface modification is reproducible and robust, the team will subject the modified surface to boiling and corrosion tests to characterize the improved nucleate boiling behavior and superior corrosion performance. The scope of work consists of the following three tasks: The first task will employ the EPD surface modification technique to coat the surface of a prototypic set of zirconium alloy cladding tube materials (e.g. Zircaloy and advanced alloys such as M5) with a micron-thick layer of zirconium oxide nanoparticles. The team will characterize the modified surface for uniformity using optical microscopy and scanning-electron microscopy, and for robustness using standard hardness measurements. After zirconium alloy cladding samples have been prepared and characterized using the EPD technique, the team will begin a set of boiling experiments to measure the heat transfer coefficient and critical heat flux (CHF) limit for each prepared sample and its control sample. This work will provide a relative comparison of the heat transfer performance for each alloy and the surface modification technique employed. As the boiling heat transfer experiments begin, the team will also begin corrosion tests for these zirconium alloy samples using a water corrosion test loop that can mimic light water reactor (LWR) operational environments. They will perform extended corrosion tests on the surface-modified zirconium alloy samples and control samples to examine the robustness of the modified surface, as well as the effect on surface oxidation

Michael Corradini; Kumar Sridharan

2012-11-26T23:59:59.000Z

118

Call for Papers The 2010 Performance Metrics for Intelligent Systems workshop will be the tenth in a series dedicated to  

E-Print Network [OSTI]

in a series dedicated to defining measures and methodologies of evaluating performance of intelligent systems systems for Hazardous Environments (e.g. nuclear remediation) - Smart Grid - Space Robotics - Medical. Started in 2000, the PerMIS series focuses on applications of performance measures to applied problems

Magee, Joseph W.

119

NERSC and HDF Group Optimize HDF5 Library to Improve I/O Performance  

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

NERSC and HDF Group Optimize HDF5 Library to Improve IO Performance NERSC and HDF Group Optimize HDF5 Library to Improve IO Performance June 28, 2010 A common complaint among air...

120

Daylight metrics and energy savings  

SciTech Connect (OSTI)

The drive towards sustainable, low-energy buildings has increased the need for simple, yet accurate methods to evaluate whether a daylit building meets minimum standards for energy and human comfort performance. Current metrics do not account for the temporal and spatial aspects of daylight, nor of occupants comfort or interventions. This paper reviews the historical basis of current compliance methods for achieving daylit buildings, proposes a technical basis for development of better metrics, and provides two case study examples to stimulate dialogue on how metrics can be applied in a practical, real-world context.

Mardaljevic, John; Heschong, Lisa; Lee, Eleanor

2009-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Measures of agreement between computation and experiment:validation metrics.  

SciTech Connect (OSTI)

With the increasing role of computational modeling in engineering design, performance estimation, and safety assessment, improved methods are needed for comparing computational results and experimental measurements. Traditional methods of graphically comparing computational and experimental results, though valuable, are essentially qualitative. Computable measures are needed that can quantitatively compare computational and experimental results over a range of input, or control, variables and sharpen assessment of computational accuracy. This type of measure has been recently referred to as a validation metric. We discuss various features that we believe should be incorporated in a validation metric and also features that should be excluded. We develop a new validation metric that is based on the statistical concept of confidence intervals. Using this fundamental concept, we construct two specific metrics: one that requires interpolation of experimental data and one that requires regression (curve fitting) of experimental data. We apply the metrics to three example problems: thermal decomposition of a polyurethane foam, a turbulent buoyant plume of helium, and compressibility effects on the growth rate of a turbulent free-shear layer. We discuss how the present metrics are easily interpretable for assessing computational model accuracy, as well as the impact of experimental measurement uncertainty on the accuracy assessment.

Barone, Matthew Franklin; Oberkampf, William Louis

2005-08-01T23:59:59.000Z

122

Specification and implementation of IFC based performance metrics to support building life cycle assessment of hybrid energy systems  

E-Print Network [OSTI]

panels (kWh/m 2 ) as the solar panel’s performance. The highlike an indication of the solar panel efficiency using theratio of ‘total solar radiation at the panel angle / total

Morrissey, Elmer; O'Donnell, James; Keane, Marcus; Bazjanac, Vladimir

2004-01-01T23:59:59.000Z

123

Improving the thermal performance of the US residential window stock  

SciTech Connect (OSTI)

Windows have typically been the least efficient thermal component in the residential envelope, but technology advances over the past decade have helped to dramatically improve the energy efficiency of window products. While the thermal performance of these advanced technology windows can be easily characterized for a particular building application, few precise estimates exist of their aggregate impact on national or regional energy use. Policy-makers, utilities, researchers and the fenestration industry must better understand these products` ultimate conservation potential in order to determine the value of developing new products and initiating programs to accelerate their market acceptance. This paper presents a method to estimate the conservation potential of advanced window technologies, combining elements of two well-known modeling paradigms: supply curves of conserved energy and residential end-use forecasting. The unique features include: detailed descriptions of the housing stock by region and vintage, state-of-the-art thermal descriptions of window technologies, and incorporation of market effects to calculate achievable conservation potential and timing. We demonstrate the methodology by comparing, for all new houses built between 1990 and 2010, the conservation potential of very efficient, high R-value ``superwindows`` in the North Central federal region and spectrally-selective low-emissivity (moderate Revalue and solar transmittance) windows in California.

Brown, R.E.; Arasteh, D.K.; Eto, J.H.

1992-05-01T23:59:59.000Z

124

Shifting the Paradigm for Long Term Monitoring at Legacy Sites to Improve Performance while Reducing Cost  

SciTech Connect (OSTI)

A major issue facing many government and private industry sites that were previously contaminated with radioactive and chemical wastes is that often the sites cannot be cleaned up enough to permit unrestricted human access. These sites will require long-term management, in some cases indefinitely, leaving site owners with the challenge of protecting human health and environmental quality in a cost effective manner. Long-term monitoring of groundwater contamination is one of the largest projected costs in the life cycle of environmental management at the Savannah River Site (SRS), the larger DOE complex, and many large federal and private sites. Currently, most monitoring strategies are focused on laboratory measurements of contaminants measured in groundwater samples collected from wells. This approach is expensive, and provides limited and lagging information about the effectiveness of cleanup activities and the behavior of the residual contamination. Over the last twenty years, DOE and other federal agencies have made significant investments in the development of various types of sensors and strategies that would allow for remote analysis of contaminants in groundwater, but these approaches do not promise significant reductions in risk or cost. Scientists at SRS have developed a new paradigm to simultaneously improve the performance of long term monitoring systems while lowering the overall cost of monitoring. This alternative approach incorporates traditional point measurements of contaminant concentration with measurements of controlling variables including boundary conditions, master variables, and traditional plume/contaminant variables. Boundary conditions are the overall driving forces that control plume movement and therefore provide leading indication to changes in plume stability. These variables include metrics associated with meteorology, hydrology, hydrogeology, and land use. Master variables are the key variables that control the chemistry of the groundwater system, and include redox variables (ORP, DO, chemicals), pH, specific conductivity, biological community (breakdown/decay products), and temperature. A robust suite of relatively inexpensive tools is commercially available to measure these variables. Traditional plume/contaminant variables are various measures of contaminant concentration including traditional analysis of chemicals in groundwater samples. An innovative long term monitoring strategy has been developed for acidic or caustic groundwater plumes contaminated with metals and/or radionuclides. Not only should the proposed strategy be more effective at early identification of potential risks, this strategy should be significantly more cost effective because measurement of controlling boundary conditions and master variables is relatively simple. These variables also directly reflect the evolution of the plume through time, so that the monitoring strategy can be modified as the plume 'ages'. This transformational long-term monitoring paradigm will generate significant cost savings to DOE, other federal agencies and industry and will provide improved performance and leading indicators of environmental management performance.

Eddy-Dilek, Carol A.; Looney, Brian B.; Seaman, John; Kmetz, Thomas

2013-01-10T23:59:59.000Z

125

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

source heat pumps (newer designs are greatly improved), condensing boilers, advanced control sequences to allow utilization of variable air

Singer, Brett C.

2010-01-01T23:59:59.000Z

126

Improving Remedial Planning Performance: The Rattlesnake Creek Experience  

SciTech Connect (OSTI)

The U.S. Army Corps of Engineers (USACE), Buffalo District, has responsibility for characterizing and remediating radiologically contaminated properties under the Formerly Utilized Sites Remedial Action Program (FUSRAP). Most of these FUSRAP sites include radionuclide contamination in soils where excavation and offsite disposal is the selected remedial action. For many FUSRAP soil remediation projects completed to date, the excavated contaminated soil volumes have significantly exceeded the pre-excavation volume estimates that were developed for project planning purposes. The exceedances are often attributed to limited and sparse datasets that are used to calculate the initial volume estimates. These volume exceedances complicate project budgeting and planning. Building on these experiences, the USACE took a different approach in the remediation of Rattlesnake Creek, located adjacent to the Ashland 2 site, in Tonawanda, New York. This approach included a more extensive pre-design data collection effort to improve and reduce the uncertainty in the pre-excavation volume estimates, in addition to formalizing final status survey data collection strategies prior to excavation. The final status survey sampling was fully integrated with the pre-design data collection, allowing dual use of the pre-design data that was collected (i.e., using the data to close out areas where contamination was not found, and feeding the data into volume estimates when contamination was encountered). The use of real-time measurement techniques (e.g., X-ray fluorescence [XRF] and gamma walkover surveys) during pre-excavation data collection allowed the USACE to identify and respond to unexpected contamination by allocating additional data collection to characterizing new areas of concern. The final result was an estimated soil volume and excavation footprint with a firm technical foundation and a reduction in uncertainty. However, even with extensive pre-design data collection, additional contamination was found during the excavation that led to an increase in the soil volume requiring offsite disposal. This paper describes the lessons learned regarding improving remedial planning performance from the Rattlesnake Creek experience and evaluates the level of project uncertainty reduction achieved through pre-design data collection. (authors)

Rieman, C.R.; Spector, H.L.; Andrews, S.M. [U.S. Army Corps of Engineers, Buffalo District, 1776 Niagara St., Buffalo, NY 14207 (United States); Durham, L. A.; Johnson, R. L. [Argonne National Laboratory, 9700 S. Cass Ave., EVS 900, Argonne, IL 60439 (United States); Racino, R. R. [Cabrera Services, Inc., 29 Railroad Avenue, Middletown, NY 10940 (United States)

2006-07-01T23:59:59.000Z

127

Metrics for Energy Resilience  

SciTech Connect (OSTI)

Energy lies at the backbone of any advanced society and constitutes an essential prerequisite for economic growth, social order and national defense. However there is an Achilles heel to today?s energy and technology relationship; namely a precarious intimacy between energy and the fiscal, social, and technical systems it supports. Recently, widespread and persistent disruptions in energy systems have highlighted the extent of this dependence and the vulnerability of increasingly optimized systems to changing conditions. Resilience is an emerging concept that offers to reconcile considerations of performance under dynamic environments and across multiple time frames by supplementing traditionally static system performance measures to consider behaviors under changing conditions and complex interactions among physical, information and human domains. This paper identifies metrics useful to implement guidance for energy-related planning, design, investment, and operation. Recommendations are presented using a matrix format to provide a structured and comprehensive framework of metrics relevant to a system?s energy resilience. The study synthesizes previously proposed metrics and emergent resilience literature to provide a multi-dimensional model intended for use by leaders and practitioners as they transform our energy posture from one of stasis and reaction to one that is proactive and which fosters sustainable growth.

Paul E. Roege; Zachary A. Collier; James Mancillas; John A. McDonagh; Igor Linkov

2014-09-01T23:59:59.000Z

128

Creating Markets for Green Biofuels: Measuring and improving environmental performance  

E-Print Network [OSTI]

biofuel production processes, the ability to measure environmental performance, and environmental goals all advance.

Turner, Brian T.; Plevin, Richard J.; O'Hare, Michael; Farrell, Alexander E.

2007-01-01T23:59:59.000Z

129

Extension of Comment Period on Improving Performance of Federal...  

Energy Savers [EERE]

to Export Electric Energy OE Docket No. EA-353 Boralex Fort Fairfield LP & Boralex Ashland LP: Federal Register Notice Vol 74 No 151 Request for Information on Improving...

130

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

operation with energy efficiency in building systems. X X Xoperation with energy efficiency in building systems. 10.3.energy efficiency improvements in healthcare buildings. A

Singer, Brett C.

2010-01-01T23:59:59.000Z

131

Improving Pumping System Performance: A Sourcebook for Industry, Second Edition  

SciTech Connect (OSTI)

Prepared for the DOE Industrial Technologies Program, this sourcebook contains the practical guidelines and information manufacturers need to improve the efficiency of their pumping systems.

Not Available

2006-05-01T23:59:59.000Z

132

Case Study - The Challenge: Improving the Performance of a Waste...  

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

examines how the City of Long Beach, California, was able to improve the operational efficiency of its Southeast Resource Recovery Facility (SERRF), a recycling and solid...

133

Resilience Metrics  

Energy Savers [EERE]

- CIRA will utilize existing ANL capabilities in areas such as: * High performance computing * Climate modeling * Energy systems modeling * Complex adaptive systems 2...

134

Permanent magnet assisted synchronous reluctance motor, design and performance improvement  

E-Print Network [OSTI]

Recently, permanent magnet assisted (PMa)-synchronous reluctance motors (SynRM) have been considered as a possible alternative motor drive for high performance applications. In order to have an efficient motor drive, performing of three steps...

Niazi, Peyman

2006-04-12T23:59:59.000Z

135

PROGRESS TOWARDS NEXT GENERATION, WAVEFORM BASED THREE-DIMENSIONAL MODELS AND METRICS TO IMPROVE NUCLEAR EXPLOSION MONITORING IN THE MIDDLE EAST  

SciTech Connect (OSTI)

Efforts to update current wave speed models of the Middle East require a thoroughly tested database of sources and recordings. Recordings of seismic waves traversing the region from Tibet to the Red Sea will be the principal metric in guiding improvements to the current wave speed model. Precise characterizations of the earthquakes, specifically depths and faulting mechanisms, are essential to avoid mapping source errors into the refined wave speed model. Errors associated with the source are manifested in amplitude and phase changes. Source depths and paths near nodal planes are particularly error prone as small changes may severely affect the resulting wavefield. Once sources are quantified, regions requiring refinement will be highlighted using adjoint tomography methods based on spectral element simulations [Komatitsch and Tromp (1999)]. An initial database of 250 regional Middle Eastern events from 1990-2007, was inverted for depth and focal mechanism using teleseismic arrivals [Kikuchi and Kanamori (1982)] and regional surface and body waves [Zhao and Helmberger (1994)]. From this initial database, we reinterpreted a large, well recorded subset of 201 events through a direct comparison between data and synthetics based upon a centroid moment tensor inversion [Liu et al. (2004)]. Evaluation was done using both a 1D reference model [Dziewonski and Anderson (1981)] at periods greater than 80 seconds and a 3D model [Kustowski et al. (2008)] at periods of 25 seconds and longer. The final source reinterpretations will be within the 3D model, as this is the initial starting point for the adjoint tomography. Transitioning from a 1D to 3D wave speed model shows dramatic improvements when comparisons are done at shorter periods, (25 s). Synthetics from the 1D model were created through mode summations while those from the 3D simulations were created using the spectral element method. To further assess errors in source depth and focal mechanism, comparisons between the three methods were made. These comparisons help to identify problematic stations and sources which may bias the final solution. Estimates of standard errors were generated for each event's source depth and focal mechanism to identify poorly constrained events. A final, well characterized set of sources and stations will be then used to iteratively improve the wave speed model of the Middle East. After a few iterations during the adjoint inversion process, the sources will be reexamined and relocated to further reduce mapping of source errors into structural features. Finally, efforts continue in developing the infrastructure required to 'quickly' generate event kernels at the n-th iteration and invert for a new, (n+1)-th, wave speed model of the Middle East. While development of the infrastructure proceeds, initial tests using a limited number of events shows the 3D model, while showing vast improvement compared to the 1D model, still requires substantial modifications. Employing our new, full source set and iterating the adjoint inversions at successively shorter periods will lead to significant changes and refined wave speed structures of the Middle East.

Savage, B; Peter, D; Covellone, B; Rodgers, A; Tromp, J

2009-07-02T23:59:59.000Z

136

Improving Building Energy System Performance by Continuous Commissioning  

E-Print Network [OSTI]

data. The first buildings to undergo a continuous commissioning process were in the Texas LoanSTAR program [Liu, et al, 1994, Claridge, et al, 1994]. These buildings had been retrofitted with various energy efficiency improvements, and measured hourly...

Turner, W. D.; Liu, M.; Claridge, D. E.; Haberl, J. S.

1996-01-01T23:59:59.000Z

137

Improved performance of railcar/rail truck interface components  

E-Print Network [OSTI]

turning moments around curved track, wear of truck components, and increased detrimental dynamic effects. The recommended improvement of the rail truck interface is a set of two steel inserts, one concave and one convex, that can be retrofit to center...

Story, Brett Alan

2009-05-15T23:59:59.000Z

138

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

Integrated design, incorporation of models from other advanced buildingsand building operators. Communication with users through integrated designintegrated design process has great potential to advance cost-effective reductions in energy intensity – often while improving building

Singer, Brett C.

2010-01-01T23:59:59.000Z

139

Improving driving training with a handheld performance support system  

E-Print Network [OSTI]

The handheld computer Driver Trainer application is an element of a new training program by the transportation company to improve the safety of new truck drivers. Its aim is to aid trainers objectively evaluate truck drivers ...

Liu, Xia, M. Eng. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

140

J.R. Simplot: Burner Upgrade Project Improves Performance and...  

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

Company saved energy and money by increasing the efficiency of the steam system in its potato processing plant in Caldwell, Idaho. J.R. Simplot: Burner Upgrade Project Improves...

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

Efficiency 11-Sept-2009 9. Economic and Organizationaland Organizational Issues 9.1. Strategies to overcome structural challenges to energy efficiencyorganizational scheme to facilitate discussion of challenges to improving energy efficiency

Singer, Brett C.

2010-01-01T23:59:59.000Z

142

Near-term improvements in parabolic troughs: an economic and performance assessment  

SciTech Connect (OSTI)

Improved parabolic-trough concentrating collectors will result from better design, improved fabrication techniques, and the development and utilization of improved materials. This analysis qualifies the performance potential of various parabolic-trough component improvements from a systems viewpoint and uses these performance data to determine the worth of each improvement on an economic basis. The improvements considered are evacuated receivers, silvered-glass reflectors, improved receiver, selective coatings, higher optical accuracy concentrations, and higher transmittance receiver glazings. Upper-bound costs for each improvement are provided as well as estimates of the increased solar system rates of return that are made possible by these improvements. The performance and economic potential of some of these improvements are shown to be substantial, especially at higher collector operating temperatures.

Gee, R.; Murphy, L.M.

1981-08-01T23:59:59.000Z

143

Improving consumer value through enhanced performance around the world  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformation for planning experimental workImprovingImproving consumer

144

Improvement of Urea SCR Performance Using Wiremesh Thermolysis...  

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

Enhanced Particulate Oxidation and Efficient Urea SCR NOx Reduction SCR Performance Optimization Through Advancements in Aftertreatment Packaging Urea Mixing Design -- Simulation...

145

New MEA Materials for Improved DMFC Performance, Durability and...  

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

performance and durability - Johnson Matthey * MEA fabrication scale up and MEA optimization 2 Project Objectives * Leverage the PolyFuel Passive water recovery MEA design to...

146

Enhancements to SQLite Library to Improve Performance on Mobile Platforms  

E-Print Network [OSTI]

mechanism is added to the database file using byte-range locks for fine-grained locking. Its impact on performance is measured using SQLite benchmarks as well as real applications. A multi-threaded benchmark is designed to measure the performance of fine...

Sambasivan Ramachandran, Shyam

2013-07-29T23:59:59.000Z

147

Improving Reactor Performance Rose Montgomery The Tennessee Valley Authority  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun withconfinementEtching.348 270 300 219Improvements toProjectsImproving

148

Performance Engineering: Understanding and Improving the Performance of Large-Scale Codes  

E-Print Network [OSTI]

Journal of High Performance Computing Applications, vol.component of the high-performance computing world. This isJournal of High Performance Computing Applications, vol.

2008-01-01T23:59:59.000Z

149

Free Flow Power Partners to Improve Hydrokinetic Turbine Performance...  

Office of Environmental Management (EM)

as the device performed as expected, with no discernible harm to river-dwelling fish. Free Flow has also completed preliminary designs of utility-scale installations at a...

150

The Emergence of Trade Associations as Agents of Environmental Performance Improvement  

E-Print Network [OSTI]

This paper explores a surprising phenomenon: the emergence of trade associations as agents of environmental performance improvement. Trade associations in the United States have historically fought environmental regulation, ...

Nash, Jennifer

2002-08-26T23:59:59.000Z

151

Improving urban transport performances by tendering lots : an econometric estimation of  

E-Print Network [OSTI]

- 1 - Improving urban transport performances by tendering lots : an econometric estimation, Christensen & Tretheway 1984), and a large number of econometric estimations had been realised on urban

Paris-Sud XI, Université de

152

Improving datacenter performance and robustness with multipath TCP Paper #273, 14 pages  

E-Print Network [OSTI]

Improving datacenter performance and robustness with multipath TCP Paper #273, 14 pages ABSTRACT by MPTCP. Using MPTCP allows us to rethink datacenter networks, with a different mindset

Wischik, Damon

153

Approach for the Improvement of Energy Performance of a Stock of Buildings  

E-Print Network [OSTI]

This paper summarizes the work performed by CSTB, ADEME and the Ministry of equipment in France to improve the energy performance of the ministry stock of buildings: 7 millions square meters, 10 000 buildings, wide range of different buildings...

Vaezi-Nejad, H.; Bouillon, J.; Crozier, L.; Guyot, G.

2003-01-01T23:59:59.000Z

154

Improving Indoor Air Quality Improves the Performance of Office Work and School Work  

E-Print Network [OSTI]

-10-15a Proceedings of the Eighth International Conference for Enhanced Building Operations, Berlin, Germany, October 20-22, 2008 Definitions #0;? Performance: ability of an individual to perform different mentally and/or physically demanding tasks... Building Operations, Berlin, Germany, October 20-22, 2008 Performance vs productivity #0;? #0;? Effect on individual performance of reading: reduced by 10% Effect on overall productivity: reduced by only 5% if reading speed critical for 50...

Wargocki, P.

155

Improving cryogenic deuterium–tritium implosion performance on OMEGA  

SciTech Connect (OSTI)

A flexible direct-drive target platform is used to implode cryogenic deuterium–tritium (DT) capsules on the OMEGA laser [Boehly et al., Opt. Commun. 133, 495 (1997)]. The goal of these experiments is to demonstrate ignition hydrodynamically equivalent performance where the laser drive intensity, the implosion velocity, the fuel adiabat, and the in-flight aspect ratio (IFAR) are the same as those for a 1.5-MJ target [Goncharov et al., Phys. Rev. Lett. 104, 165001 (2010)] designed to ignite on the National Ignition Facility [Hogan et al., Nucl. Fusion 41, 567 (2001)]. The results from a series of 29 cryogenic DT implosions are presented. The implosions were designed to span a broad region of design space to study target performance as a function of shell stability (adiabat) and implosion velocity. Ablation-front perturbation growth appears to limit target performance at high implosion velocities. Target outer-surface defects associated with contaminant gases in the DT fuel are identified as the dominant perturbation source at the ablation surface; performance degradation is confirmed by 2D hydrodynamic simulations that include these defects. A trend in the value of the Lawson criterion [Betti et al., Phys. Plasmas 17, 058102 (2010)] for each of the implosions in adiabat–IFAR space suggests the existence of a stability boundary that leads to ablator mixing into the hot spot for the most ignition-equivalent designs.

Sangster, T. C.; Goncharov, V. N.; Betti, R.; Radha, P. B.; Boehly, T. R.; Collins, T. J. B.; Craxton, R. S.; Delettrez, J. A.; Edgell, D. H.; Epstein, R.; Forrest, C. J.; Froula, D. H.; Glebov, Y. Yu.; Harding, D. R.; Hohenberger, M.; Hu, S. X.; Igumenshchev, I. V.; Janezic, R.; Kelly, J. H.; Kessler, T. J. [Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623 (United States)] [Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623 (United States); and others

2013-05-15T23:59:59.000Z

156

Performance-Based Evaluation of an Improved Robust Optimization Formulation  

E-Print Network [OSTI]

of risk, and ability to adapt. Formulating a tool to meet the information needs of a decision management; Benefit-cost analysis; Decision-making under uncertainty; Regional planning. Introduction), and (4) risk of performance deterioration (sustainability). In addition, a decision-maker may want

Vogel, Richard M.

157

Improving Steam System Performance: A Sourcebook for Industry, Second  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNG | Department ofHTS CableDepartment ofDepartment of EnergyImproving

158

Improving Radar Antenna Performance with Eigenvalue Processing of  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun withconfinementEtching.348 270 300 219Improvements toProjects

159

Silicon sponge improves lithium-ion battery performance | EMSL  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted forHighlightsSeminarsSilicon sponge improves lithium-ion battery

160

Silver particles improve performance of battery material | Argonne National  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted forHighlightsSeminarsSilicon sponge improves lithium-ionAbout

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Improvement in Plasma Performance with Lithium Coatings in NSTX  

SciTech Connect (OSTI)

Lithium as a plasma-facing material has attractive features, including a reduction in the recycling of hydrogenic species and the potential for withstanding high heat and neutron fluxes in fusion reactors. Dramatic effects on plasma performance with lithium-coated plasma-facing components (PFC's) have been demonstrated on many fusion devices, including TFTR, T-11M, and FT-U. Using a liquid-lithium-filled tray as a limiter, the CDX-U device achieved very significant enhancement in the confinement time of ohmically heated plasmas. The recent NSTX experiments reported here have demonstrated, for the first time, significant and recurring benefits of lithium PFC coatings on divertor plasma performance in both L- and H- mode regimes heated by neutral beams.

Kaita, R

2009-02-17T23:59:59.000Z

162

Improvement in Plasma Performance with Lithium Coatings in NSTX  

SciTech Connect (OSTI)

Lithium as a plasma-facing material has attractive features, including a reduction in the recycling of hydrogenic species and the potential for withstanding high heat and neutron fluxes in fusion reactors. Dramatic effects on plasma performance with lithium-coated plasma-facing components (PFCOs) have been demonstrated on many fusion devices, including TFTR, [1] T-11M, [2] and FT-U. [3] Using a liquid-lithium-filled tray as a limiter, the CDX-U device achieved very significant enhancement in the confinement time of ohmically heated plasmas. [4] The recent NSTX experiments reported here have demonstrated, for the first time, significant and recurring benefits of lithium PFC coatings on divertor plasma performance in both L- and H- mode regimes heated by neutral beams.

Kaita, R; Ahn, J -W; Allain, J P; Bell, M G; Bell, R; Boedo, J; Bush, C; Mansfield, D; Menard, J; Mueller, D; Ono, M; Paul, S; Raman, R; Roquemore, A L; Ross, P W; Sabbagh, S; Schneider, H; Skinner, C H; Soukhanovskii, V; Stevenson, T; Stotler, D; Timberlake, J; Wampler, W R; Wilgen, J B

2008-09-12T23:59:59.000Z

163

Metrics for enterprise transformation  

E-Print Network [OSTI]

The objective of this thesis is to depict the role of metrics in the evolving journey of enterprise transformation. To this end, three propositions are explored: (i) metrics and measurement systems drive transformation, ...

Blackburn, Craig D. (Craig David), S. M. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

164

Raytheon: Compressed Air System Upgrade Saves Energy and Improves Performance  

SciTech Connect (OSTI)

In 2003, Raytheon Company upgraded the efficiency of the compressed air system at its Integrated Air Defense Center in Andover, Massachusetts, to save energy and reduce costs. Worn compressors and dryers were replaced, a more sophisticated control strategy was installed, and an aggressive leak detection and repair effort was carried out. The total cost of these improvements was $342,000; however, National Grid, a utility service provider, contributed a $174,000 incentive payment. Total annual energy and maintenance cost savings are estimated at $141,500, and energy savings are nearly 1.6 million kWh. This case study was prepared for the U.S. Department of Energy's Industrial Technologies Program.

Not Available

2005-04-01T23:59:59.000Z

165

Lithium Surface Coatings for Improved Plasma Performance in NSTX  

SciTech Connect (OSTI)

NSTX high-power divertor plasma experiments have shown, for the first time, significant and frequent benefits from lithium coatings applied to plasma facing components. Lithium pellet injection on NSTX introduced lithium pellets with masses 1 to 5 mg via He discharges. Lithium coatings have also been applied with an oven that directed a collimated stream of lithium vapor toward the graphite tiles of the lower center stack and divertor. Lithium depositions from a few mg to 1 g have been applied between discharges. Benefits from the lithium coating were sometimes, but not always seen. These improvements sometimes included decreases plasma density, inductive flux consumption, and ELM frequency, and increases in electron temperature, ion temperature, energy confinement and periods of MHD quiescence. In addition, reductions in lower divertor D, C, and O luminosity were measured.

Kugel, H W; Ahn, J -W; Allain, J P; Bell, R; Boedo, J; Bush, C; Gates, D; Gray, T; Kaye, S; Kaita, R; LeBlanc, B; Maingi, R; Majeski, R; Mansfield, D; Menard, J; Mueller, D; Ono, M; Paul, S; Raman, R; Roquemore, A L; Ross, P W; Sabbagh, S; Schneider, H; Skinner, C H; Soukhanovskii, V; Stevenson, T; Timberlake, J; Wampler, W R

2008-02-19T23:59:59.000Z

166

Apparatus for improving performance of electrical insulating structures  

DOE Patents [OSTI]

Removing the electrical field from the internal volume of high-voltage structures; e.g., bushings, connectors, capacitors, and cables. The electrical field is removed from inherently weak regions of the interconnect, such as between the center conductor and the solid dielectric, and places it in the primary insulation. This is accomplished by providing a conductive surface on the inside surface of the principal solid dielectric insulator surrounding the center conductor and connects the center conductor to this conductive surface. The advantage of removing the electric fields from the weaker dielectric region to a stronger area improves reliability, increases component life and operating levels, reduces noise and losses, and allows for a smaller compact design. This electric field control approach is currently possible on many existing products at a modest cost. Several techniques are available to provide the level of electric field control needed. Choosing the optimum technique depends on material, size, and surface accessibility. The simplest deposition method uses a standard electroless plating technique, but other metalization techniques include vapor and energetic deposition, plasma spraying, conductive painting, and other controlled coating methods.

Wilson, Michael J. (Modesto, CA); Goerz, David A. (Brentwood, CA)

2002-01-01T23:59:59.000Z

167

Method for improving performance of highly stressed electrical insulating structures  

DOE Patents [OSTI]

Removing the electrical field from the internal volume of high-voltage structures; e.g., bushings, connectors, capacitors, and cables. The electrical field is removed from inherently weak regions of the interconnect, such as between the center conductor and the solid dielectric, and places it in the primary insulation. This is accomplished by providing a conductive surface on the inside surface of the principal solid dielectric insulator surrounding the center conductor and connects the center conductor to this conductive surface. The advantage of removing the electric fields from the weaker dielectric region to a stronger area improves reliability, increases component life and operating levels, reduces noise and losses, and allows for a smaller compact design. This electric field control approach is currently possible on many existing products at a modest cost. Several techniques are available to provide the level of electric field control needed. Choosing the optimum technique depends on material, size, and surface accessibility. The simplest deposition method uses a standard electroless plating technique, but other metalization techniques include vapor and energetic deposition, plasma spraying, conductive painting, and other controlled coating methods.

Wilson, Michael J. (Modesto, CA); Goerz, David A. (Brentwood, CA)

2002-01-01T23:59:59.000Z

168

Apparatus for improving performance of electrical insulating structures  

DOE Patents [OSTI]

Removing the electrical field from the internal volume of high-voltage structures; e.g., bushings, connectors, capacitors, and cables. The electrical field is removed from inherently weak regions of the interconnect, such as between the center conductor and the solid dielectric, and places it in the primary insulation. This is accomplished by providing a conductive surface on the inside surface of the principal solid dielectric insulator surrounding the center conductor and connects the center conductor to this conductive surface. The advantage of removing the electric fields from the weaker dielectric region to a stronger area improves reliability, increases component life and operating levels, reduces noise and losses, and allows for a smaller compact design. This electric field control approach is currently possible on many existing products at a modest cost. Several techniques are available to provide the level of electric field control needed. Choosing the optimum technique depends on material, size, and surface accessibility. The simplest deposition method uses a standard electroless plating technique, but other metalization techniques include vapor and energetic deposition, plasma spraying, conductive painting, and other controlled coating methods.

Wilson, Michael J.; Goerz, David A.

2004-08-31T23:59:59.000Z

169

Development of an improved performance SiGe unicouple  

SciTech Connect (OSTI)

A two-step diffusion bonding process was developed such that the p-type material is bonded to the SiMo hot shoe first at 1594 K followed by the lower melting point n-type material between 1518 and 1520 K. Standard procedures were used to silicon nitride coat the thermoelectric pellets and to attach the cold side CTE transition and heat rejection components to produce unicouples. Two unicouples successfully withstood simulated rivet operations as would be experienced in the fabrication of a Radioisotope Thermoelectric Generator (RTG) converter to verify the integrity of the tungsten cold shoe to thermoelectric material interface. The performance of these unicouples will be further evaluated in an 18-couple test module. {copyright}American Institute of Physics 1995

Nakahara, J.F.; Franklin, B.; DeFillipo, L.E. [Martin Marietta Astro Space, PO Box 8555, Room 29B12, Philadelphia, Pennsylvania 19101-8555 (United States)

1995-01-20T23:59:59.000Z

170

Improving the Performance of Lithium Ion Batteries at Low Temperature  

SciTech Connect (OSTI)

The ability for Li-ion batteries to operate at low temperatures is extremely critical for the development of energy storage for electric and hybrid electric vehicle technologies. Currently, Li-ion cells have limited success in operating at temperature below –10 deg C. Electrolyte conductivity at low temperature is not the main cause of the poor performance of Li-ion cells. Rather the formation of a tight interfacial film between the electrolyte and the electrodes has often been an issue that resulted in a progressive capacity fading and limited discharge rate capability. The objective of our Phase I work is to develop novel electrolytes that can form low interfacial resistance solid electrolyte interface (SEI) films on carbon anodes and metal oxide cathodes. From the results of our Phase I work, we found that the interfacial impedance of Fluoro Ethylene Carbonate (FEC) electrolyte at the low temperature of –20degC is astonishingly low, compared to the baseline 1.2M LiPFEMC:EC:PC:DMC (10:20:10:60) electrolyte. We found that electrolyte formulations with fluorinated carbonate co-solvent have excellent film forming properties and better de-solvation characteristics to decrease the interfacial SEI film resistance and facilitate the Li-ion diffusion across the SEI film. The very overwhelming low interfacial impedance for FEC electrolytes will translate into Li-ion cells with much higher power for cold cranking and high Regen/charge at the low temperature. Further, since the SEI film resistance is low, Li interaction kinetics into the electrode will remain very fast and thus Li plating during Regen/charge period be will less likely to happen.

Trung H. Nguyen; Peter Marren; Kevin Gering

2007-04-20T23:59:59.000Z

171

Performance Engineering: Understanding and Improving thePerformance of Large-Scale Codes  

SciTech Connect (OSTI)

Achieving good performance on high-end computing systems is growing ever more challenging due to enormous scale, increasing architectural complexity, and increasing application complexity. To address these challenges in DOE's SciDAC-2 program, the Performance Engineering Research Institute (PERI) has embarked on an ambitious research plan encompassing performance modeling and prediction, automatic performance optimization and performance engineering of high profile applications. The principal new component is a research activity in automatic tuning software, which is spurred by the strong user preference for automatic tools.

Bailey, David H.; Lucas, Robert; Hovland, Paul; Norris, Boyana; Yelick, Kathy; Gunter, Dan; de Supinski, Bronis; Quinlan, Dan; Worley,Pat; Vetter, Jeff; Roth, Phil; Mellor-Crummey, John; Snavely, Allan; Hollingsworth, Jeff; Reed, Dan; Fowler, Rob; Zhang, Ying; Hall, Mary; Chame, Jacque; Dongarra, Jack; Moore, Shirley

2007-10-01T23:59:59.000Z

172

Improving Secure Server Performance by Rebalancing SSL/TLS Claude Castelluccia, Einar Mykletun, Gene Tsudik  

E-Print Network [OSTI]

Improving Secure Server Performance by Re­balancing SSL/TLS Handshakes Claude Castelluccia, Einar of each SSL handshake. Since most SSL­enabled servers use RSA, the burden of performing many costly to perform commensurately less work, thus resulting in better SSL throughput. Proposed tech­ niques are based

173

Technetium and Iodine Getters to Improve Cast Stone Performance  

SciTech Connect (OSTI)

To determine the effectiveness of the various getter materials prior to their solidification in Cast Stone, a series of batch sorption experiments was performed at Pacific Northwest National Laboratory. To quantify the effectiveness of the removal of Tc(VII) and I(I) from solution by getters, the distribution coefficient, Kd (mL/g), was calculated. Testing involved placing getter material in contact with spiked waste solutions at a 1:100 solid-to-solution ratio for periods up to 45 days with periodic solution sampling. One Tc getter was also tested at a 1:10 solid-to-solution ratio. Two different solution media, 18.2 M? deionized water (DI H2O) and a 7.8 M Na LAW simulant, were used in the batch sorption tests. Each test was conducted at room temperature in an anoxic chamber containing N2 with a small amount of H2 (0.7%) to maintain anoxic conditions. Each getter-solution combination was run in duplicate. Three Tc- and I-doping concentrations were used separately in aliquots of both the 18.2 M? DI H2O and a 7.8 M Na LAW waste simulant. The 1× concentration was developed based on Hanford Tank Waste Operations Simulator (HTWOS) model runs to support the River Protection Project System Plan Revision 6. The other two concentrations were 5× and 10× of the HTWOS values. The Tc and I tests were run separately (i.e., the solutions did not contain both solutes). Sampling of the solid-solution mixtures occurred nominally after 0.2, 1, 3, 6, 9, 12, 15 days and ~35 to 45 days. Seven getter materials were tested for Tc and five materials were tested for I. The seven Tc getters were blast furnace slag 1 (BFS1) (northwest source), BFS2 (southeast source), Sn(II)-treated apatite, Sn(II) chloride, nano tin phosphate, KMS (a potassium-metal-sulfide), and tin hydroxapatite. The five iodine getters were layered bismuth hydroxide (LBH), argentite mineral, synthetic argentite, silver-treated carbon, and silver-treated zeolite. The Tc Kd values measured from experiments conducted using the 7.8 M Na LAW simulant (the simulant selected to represent LAW) for the first 15 days for four Tc getters (BFS1, BFS2, Sn(II)-treated apatite, and Sn(II) chloride) show no, to a very small, capacity to remove Tc from the LAW simulant. For the Tc-getter experiments in the 7.8 M LAW simulant, the majority of the effluent samples show very small drops in Tc concentrations for the 35-day compared to the 15-day samplings. However, the Tc concentration in the simulant blanks also dropped slightly during this period, so the effect of the getter contacting LAW simulant at 35 days compared to 15 days is minimal; except that the BFS1 1:10 test shows a slow but steady decrease in Tc concentration in the LAW simulant supernatant from the beginning to the 35 day contact at which point about 20% of the original Tc has been removed from solution. Lastly, the KMS getter gives the highest Kd value for Tc at 35 days where Kd values have increased to 104 mL/g. When considering the different I getters reacting with the 7.8 M LAW simulant, two getters are much more effective than the others: Ag zeolite and Syn Arg. The other getters have calculated iodide distribution coefficients that show very limited effectiveness in the caustic conditions created by the LAW simulant. These are preliminary results that will need more detailed analyses including both pre- and post-batch sorption getter solid-phase characterization using state-of-the-art instrumentation such as synchrotron X ray absorption spectroscopy, which can delineate the oxidation state of the Tc and likely iodine species as well as some of the getters key major components, sulfur and iron in the BFS, and tin and sulfur in the tin-bearing and sulfur-bearing getters. This report also describes future experimental studies to be performed to better elucidate the mechanisms controlling the Tc and I sequestration processes in the various getters and leach tests of getter-bearing Cast Stone monoliths.

Qafoku, Nikolla; Neeway, James J.; Lawter, Amanda R.; Levitskaia, Tatiana G.; Serne, R. Jeffrey; Westsik, Joseph H.; Snyder, Michelle MV

2014-07-01T23:59:59.000Z

174

Smart Grid Status and Metrics Report Appendices  

SciTech Connect (OSTI)

A smart grid uses digital power control and communication technology to improve the reliability, security, flexibility, and efficiency of the electric system, from large generation through the delivery systems to electricity consumers and a growing number of distributed generation and storage resources. To convey progress made in achieving the vision of a smart grid, this report uses a set of six characteristics derived from the National Energy Technology Laboratory Modern Grid Strategy. The Smart Grid Status and Metrics Report defines and examines 21 metrics that collectively provide insight into the grid’s capacity to embody these characteristics. This appendix presents papers covering each of the 21 metrics identified in Section 2.1 of the Smart Grid Status and Metrics Report. These metric papers were prepared in advance of the main body of the report and collectively form its informational backbone.

Balducci, Patrick J.; Antonopoulos, Chrissi A.; Clements, Samuel L.; Gorrissen, Willy J.; Kirkham, Harold; Ruiz, Kathleen A.; Smith, David L.; Weimar, Mark R.; Gardner, Chris; Varney, Jeff

2014-07-01T23:59:59.000Z

175

Performance Engineering: Understanding and Improving the Performance of Large-Scale Codes  

E-Print Network [OSTI]

An API for Runtime Code Patching,” Journal of Highof the Conference on Code Generation and Optimization,Performance of Large-Scale Codes David H. Bailey 1 , Robert

2008-01-01T23:59:59.000Z

176

EM, Industry Partner to Lay Out Opportunities to Improve Contract Performance Following Workshop  

Broader source: Energy.gov [DOE]

WASHINGTON, D.C. – EM and its large and small business partners will implement several recommendations that emerged from a workshop held earlier this year to improve contract performance with the objective of delivering results on time and within cost.

177

An improved structural mechanics model for the FRAPCON nuclear fuel performance code  

E-Print Network [OSTI]

In order to provide improved predictions of Pellet Cladding Mechanical Interaction (PCMI) for the FRAPCON nuclear fuel performance code, a new model, the FRAPCON Radial-Axial Soft Pellet (FRASP) model, was developed. This ...

Mieloszyk, Alexander James

2012-01-01T23:59:59.000Z

178

Improved Heat Transfer and Performance of High Intensity Combustion Systems for Reformer Furnace Applications  

E-Print Network [OSTI]

and should enable substantial capital cost savings in new furnace applications. Recent performance improvements established from tests of high intensity combustion systems are described along with advances made in the analytical prediction of design...

Williams, F. D. M.; Kondratas, H. M.

1983-01-01T23:59:59.000Z

179

Integrated Approach Towards the Application of Horizontal Wells to Improve Waterflooding Performance  

SciTech Connect (OSTI)

This final report describes the progress during the six year of the project on ''Integrated Approach Towards the Application of Horizontal Wells to Improve Waterflooding Performance.'' This report is funded under the Department of Energy's (DOE's) Class I program which is targeted towards improving the reservoir performance of mature oil fields located in fluvially-dominated deltaic deposits. The project involves using an integrated approach to characterize the reservoir followed by drilling of horizontal injection wells to improve production performance. The project was divided into two budget periods. In the first budget period, many modern technologies were used to develop a detailed reservoir management plan; whereas, in the second budget period, conventional data was used to develop a reservoir management plan. The idea was to determine the cost effectiveness of various technologies in improving the performance of mature oil fields.

Kelkar, Mohan; Liner, Chris; Kerr, Dennis

1999-10-15T23:59:59.000Z

180

Substrate and channel engineering for improving performance of strained-SiGe MOSFETs  

E-Print Network [OSTI]

With VLSI technology moving closer towards fundamental physical limits, a way to further improve the transistor drive current for superior circuit performance is enhancing the average velocity of carriers in the channel. ...

Gupta, Saurabh, Ph. D. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Transition metal oxide improves overall efficiency and maintains performance with inexpensive metals.  

E-Print Network [OSTI]

metals. A research team at the National Renewable Energy Laboratory (NREL) has demonstrated Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. 1617 Cole BoulevardTransition metal oxide improves overall efficiency and maintains performance with inexpensive

182

Experimental Evaluation of Performance Improvements in Abductive Network Classifiers with Problem Decomposition  

E-Print Network [OSTI]

1 Experimental Evaluation of Performance Improvements in Abductive Network Classifiers with Problem by problem decomposition for abductive network classifiers that classify four noisy waveform patterns having decomposition method and significantly superior to an abductive network committee approach. Index Terms

Abdel-Aal, Radwan E.

183

Optimizing Graph Algorithms for Improved Cache Performance*+ Joon-Sang Park  

E-Print Network [OSTI]

. For these algorithms, we demonstrate up to 2Ã? improvement in real execution time by using a simple cache- friendly graphs. We show performance improvements of 2Ã? - 3Ã? in real execution time by using the technique N and C are the problem size and cache size respectively. Experimental results show that this cache

Prasanna, Viktor K.

184

NREL study may provide future guidance in improving CdS/CdTe photovoltaic device performance.  

E-Print Network [OSTI]

NREL study may provide future guidance in improving CdS/CdTe photovoltaic device performance. The majority of minority carrier lifetime (MCL) studies performed on CdS/CdTe photovoltaic (PV) devices have Carrier Lifetime Measurements in Superstrate and Substrate CdTe PV Devices." Proc. 37th IEEE Photovoltaic

185

Reverse SSL: Improved Server Performance and DoS Resistance for SSL Kemal BICAKCI  

E-Print Network [OSTI]

1 Reverse SSL: Improved Server Performance and DoS Resistance for SSL Handshakes Kemal BICAKCI the performance and DoS resistance of SSL handshakes. In this paper, we tackle these two related problems by proposing reverse SSL, an extension in which the server is relieved from the heavy public key decryption

186

APPLICATION OF IT AND INTERNATIONAL STANDARDS TO IMPROVE BUILDING ENVELOPE PERFORMANCE  

E-Print Network [OSTI]

APPLICATION OF IT AND INTERNATIONAL STANDARDS TO IMPROVE BUILDING ENVELOPE PERFORMANCE Hua Sheng He with IT and international standards, such as IFC, can ensure that the building envelope satisfies energy requirements1 , Amin Hammad2 , and Paul Fazio1 1 Building Envelope Performance Laboratory; Centre for Building

Hammad, Amin

187

BLACK-BOX MODELLING OF HVAC SYSTEM: IMPROVING THE PERFORMANCES OF NEURAL NETWORKS  

E-Print Network [OSTI]

BLACK-BOX MODELLING OF HVAC SYSTEM: IMPROVING THE PERFORMANCES OF NEURAL NETWORKS Eric FOCK Ile de La Réunion - FRANCE ABSTRACT This paper deals with neural networks modelling of HVAC systems of HVAC system can be modelled using manufacturer design data presented as derived performance maps

Boyer, Edmond

188

Integration of Sustainability Metrics into Design Cases and State...  

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

quantify and assess key sustainability metrics which allow for conversion pathway evaluation and comparison. c) For certain pathways, full LCA is performed for sensitivity cases...

189

Industrial Decision Making- Improving Petroleum Refining Performance through Better Economic Performance Analysis  

E-Print Network [OSTI]

for Performance Making product from crude oil is a very much more complicated process than the foregoing simple example cited. One of the major complications results from the fact that when making salable product by converting crude oil, the results produce a... volumetric gain. That is, for every 100 barrels of crude oil processed, the outtum may be 110 or 115 equivalent barrels of products ( see figure 1). This looks too good to be true! The reason this anomaly occurs is that in the conversion of crude oil...

Mergens, E. H.

190

Shifting the Paradigm for Long Term Monitoring at Legacy Sites to Improve Performance while Reducing Costs - 13422  

SciTech Connect (OSTI)

A major issue facing many government and private industry sites that were previously contaminated with radioactive and chemical wastes is that often the sites cannot be cleaned up enough to permit unrestricted human access. These sites will require long-term management, in some cases indefinitely, leaving site owners with the challenge of protecting human health and environmental quality in a cost effective manner. Long-term monitoring of groundwater contamination is one of the largest projected costs in the life cycle of environmental management at the Savannah River Site (SRS), the larger DOE complex, and many large federal and private sites. Currently, most monitoring strategies are focused on laboratory measurements of contaminants measured in groundwater samples collected from wells. This approach is expensive, and provides limited and lagging information about the effectiveness of cleanup activities and the behavior of the residual contamination. Over the last twenty years, DOE and other federal agencies have made significant investments in the development of various types of sensors and strategies that would allow for remote analysis of contaminants in groundwater, but these approaches do not promise significant reductions in risk or cost. Scientists at SRS have developed a new paradigm to simultaneously improve the performance of long term monitoring systems while lowering the overall cost of monitoring. This alternative approach incorporates traditional point measurements of contaminant concentration with measurements of controlling variables including boundary conditions, master variables, and traditional plume/contaminant variables. Boundary conditions are the overall driving forces that control plume movement and therefore provide leading indication to changes in plume stability. These variables include metrics associated with meteorology, hydrology, hydrogeology, and land use. Master variables are the key variables that control the chemistry of the groundwater system, and include redox variables (ORP, DO, chemicals), pH, specific conductivity, biological community (breakdown/decay products), and temperature. A robust suite of relatively inexpensive tools is commercially available to measure these variables. Traditional plume/contaminant variables are various measures of contaminant concentration including traditional analysis of chemicals in groundwater samples. An innovative long term monitoring strategy has been developed for acidic or caustic groundwater plumes contaminated with metals and/or radionuclides. Not only should the proposed strategy be more effective at early identification of potential risks, this strategy should be significantly more cost effective because measurement of controlling boundary conditions and master variables is relatively simple. These variables also directly reflect the evolution of the plume through time, so that the monitoring strategy can be modified as the plume 'ages'. This transformational long-term monitoring paradigm will generate significant cost savings to DOE, other federal agencies and industry and will provide improved performance and leading indicators of environmental management performance. (authors)

Eddy-Dilek, Carol A; Looney, Brian B. [Savannah River National Laboratory (United States)] [Savannah River National Laboratory (United States); Gaughan, Thomas; Kmetz, Thomas [Savannah River Nuclear Solutions, LLC (United States)] [Savannah River Nuclear Solutions, LLC (United States); Seaman, John [Savannah River Ecology Laboratory (United States)] [Savannah River Ecology Laboratory (United States)

2013-07-01T23:59:59.000Z

191

Integrated approach towards the application of horizontal wells to improve waterflooding performance. Annual report  

SciTech Connect (OSTI)

This annual report describes the progress during the second year of the project on Integrated Approach Towards the Application of Horizontal Wells to Improve Waterflooding Performance. This project is funded under the Department of Energy`s Class I program which is targeted towards improving the reservoir performance of mature oil fields located in fluvial-dominated deltaic deposits. The project involves an integrated approach to characterize the reservoir followed by the drilling of horizontal injection wells to improve production performance. The type of data we have integrated include cross bore hole seismic surveys, geological interpretation based on logs and cores, and engineering information. This report covers the second phase of the project which includes a detailed reservoir description of the field by integrating all the available information, followed by flow simulation of the Self Unit under various operating conditions. Based on an examination of the various operating parameters, we observed that the best possible solution to improve the Self Unit performance is to recomplete and stimulate most of the wells followed by an increase in the water injection rate. Drilling of horizontal injection well, although helpful in improving the performance, was not found to be economically feasible. The proposed reservoir management plan will be implemented shortly.

Kelkar, M.; Liner, C.; Kerr, D.

1995-05-01T23:59:59.000Z

192

Embedded Sensors and Controls to Improve Component Performance and Reliability Conceptual Design Report  

SciTech Connect (OSTI)

The objective of this project is to demonstrate improved reliability and increased performance made possible by deeply embedding instrumentation and controls (I&C) in nuclear power plant (NPP) components and systems. The project is employing a highly instrumented canned rotor, magnetic bearing, fluoride salt pump as its I&C technology demonstration platform. I&C is intimately part of the basic millisecond-by-millisecond functioning of the system; treating I&C as an integral part of the system design is innovative and will allow significant improvement in capabilities and performance. As systems become more complex and greater performance is required, traditional I&C design techniques become inadequate and more advanced I&C needs to be applied. New I&C techniques enable optimal and reliable performance and tolerance of noise and uncertainties in the system rather than merely monitoring quasistable performance. Traditionally, I&C has been incorporated in NPP components after the design is nearly complete; adequate performance was obtained through over-design. By incorporating I&C at the beginning of the design phase, the control system can provide superior performance and reliability and enable designs that are otherwise impossible. This report describes the progress and status of the project and provides a conceptual design overview for the platform to demonstrate the performance and reliability improvements enabled by advanced embedded I&C.

Kisner, R.; Melin, A.; Burress, T.; Fugate, D.; Holcomb, D.; Wilgen, J.; Miller, J.; Wilson, D.; Silva, P.; Whitlow, L.; Peretz, F.

2012-09-15T23:59:59.000Z

193

Generalized utility metrics for supercomputers  

E-Print Network [OSTI]

2007:1–12 Generalized utility metrics for supercomputers 12.ISSUE PAPER Generalized utility metrics for supercomputersproblem of ranking the utility of supercom- puter systems

Strohmaier, Erich

2009-01-01T23:59:59.000Z

194

IMPROVEMENT OF CdMnTe DETECTOR PERFORMANCE BY MnTe PURIFICATION  

SciTech Connect (OSTI)

Residual impurities in manganese (Mn) are a big obstacle to obtaining high-performance CdMnTe (CMT) X-ray and gamma-ray detectors. Generally, the zone-refining method is an effective way to improve the material's purity. In this work, we purified the MnTe compounds combining the zone-refining method with molten Te, which has a very high solubility for most impurities. We confirmed the improved purity of the material by glow-discharge mass spectrometry (GDMS). We also found that CMT crystals from a multiply-refined MnTe source, grown by the vertical Bridgman method, yielded better performing detectors.

Kim, K.H.; Bolotnikov, A.E.; Camarda, G.S.; Tappero, R.; Hossain, A.; Cui, Y.; Yang, G.; Gul, R.; and James, R.B.

2011-04-25T23:59:59.000Z

195

Template-space metric for searches for gravitational waves from the inspiral, merger and ringdown of binary black holes  

E-Print Network [OSTI]

Searches for gravitational waves (GWs) from binary black holes using interferometric GW detectors require the construction of template banks for performing matched filtering while analyzing the data. Placement of templates over the parameter space of binaries, as well as coincidence tests of GW triggers from multiple detectors make use of the definition of a metric over the space of gravitational waveforms. Although recent searches have employed waveform templates coherently describing the inspiral, merger and ringdown (IMR) of the coalescence, the metric used in the template banks and coincidence tests was derived from post-Newtonian inspiral waveforms. In this paper, we compute the template-space metric of the IMR waveform family IMRPhenomB over the parameter space of masses and the effective spin parameter. We also propose a coordinate system, which is a modified version of post-Newtonian chirp time coordinates, in which the metric is slowly varying over the parameter space. The match function analytically computed using the metric has excellent agreement with the "exact" match function computed numerically. We show that the metric is able to provide a reasonable approximation to the match function of other IMR waveform families, such that the effective-one-body model calibrated to numerical relativity (EOBNRv2). The availability of this metric can contribute to improving the sensitivity of searches for GWs from binary black holes in the advanced detector era.

Chinmay Kalaghatgi; Parameswaran Ajith; K. G. Arun

2015-01-19T23:59:59.000Z

196

Integrated supercritical water gasification combined cycle (IGCC) systems for improved performance and reduced operating costs in existing plants  

SciTech Connect (OSTI)

A revolutionary hydrothermal heat recovery steam generator (HRSG) is being developed to produce clean fuels for gas turbines from slurries and emulsions of opportunity fuels. Water can be above 80% by weight and solids below 20%, including coal fines, coal water fuels, biomass, composted municipal refuse, sewage sludge and bitumen/Orimulsion. The patented HRSG tubes use a commercial method of particle scrubbing to improve heat transfer and prevent corrosion and deposition on heat transfer surfaces. A continuous-flow pilot plant is planned to test the HRSG over a wide range of operating conditions, including the supercritical conditions of water, above 221 bar (3,205 psia) and 374 C (705 F). Bench scale data shows, that supercritical water gasification below 580 C (1,076 F) and low residence time without catalysts or an oxidizer can produce a char product that can contain carbon up to the amount of fixed carbon in the proximate analysis of the solids in the feed. This char can be burned with coal in an existing combustion system to provide the heat required for gasification. The new HRSG tubes can be retrofitted into existing power plant boilers for repowering of existing plants for improved performance and reduced costs. A special condensing turbine allows final low-temperature cleaning and maintains quality and combustibility of the fuel vapor for modern gas turbine in the new Vapor Transmission Cycle (VTC). Increased power output and efficiency can be provided for existing plants, while reducing fuel costs. A preliminary computer-based process simulation model has been prepared that includes material and energy balances that simulate commercial-scale operations of the VTC on sewage sludge and coal. Results predict over 40% HHV thermal efficiency to electric power from sewage sludge at more than 83% water by weight. The system appears to become autothermal (no supplemental fuel required) at about 35% fixed carbon in the feed. Thus, bituminous and lignite coal slurries could be gasified at less than 25% coal and more than 75% water. Preliminary life cycle cost analyses indicate that disposal fees for sewage sludge improve operating economics over fuel that must be purchased, the cost and schedule advantages of natural gas-fired combined cycle systems are preserved. Sensitivity analyses show that increasing capital costs by 50% can be offset by an increase in sewage sludge disposal fees of $10/metric ton.

Tolman, R.; Parkinson, W.J.

1999-07-01T23:59:59.000Z

197

Quotients of Metric Spaces  

E-Print Network [OSTI]

the properties of quotient spaces of metric spaces. We will use "iff" as an abbreviation for "if and only if". If f is a function from X onto Y, we will write f: X --->> Y....

Herman, Robert A.

1968-01-01T23:59:59.000Z

198

Ramp Forecasting Performance from Improved Short-Term Wind Power Forecasting: Preprint  

SciTech Connect (OSTI)

The variable and uncertain nature of wind generation presents a new concern to power system operators. One of the biggest concerns associated with integrating a large amount of wind power into the grid is the ability to handle large ramps in wind power output. Large ramps can significantly influence system economics and reliability, on which power system operators place primary emphasis. The Wind Forecasting Improvement Project (WFIP) was performed to improve wind power forecasts and determine the value of these improvements to grid operators. This paper evaluates the performance of improved short-term wind power ramp forecasting. The study is performed for the Electric Reliability Council of Texas (ERCOT) by comparing the experimental WFIP forecast to the current short-term wind power forecast (STWPF). Four types of significant wind power ramps are employed in the study; these are based on the power change magnitude, direction, and duration. The swinging door algorithm is adopted to extract ramp events from actual and forecasted wind power time series. The results show that the experimental short-term wind power forecasts improve the accuracy of the wind power ramp forecasting, especially during the summer.

Zhang, J.; Florita, A.; Hodge, B. M.; Freedman, J.

2014-05-01T23:59:59.000Z

199

Using Run-Time Predictions to Estimate Queue Wait Times and Improve Scheduler Performance  

E-Print Network [OSTI]

that using our run-time predictor results in lower mean wait times for the workloads with higher o ered loads of the systems we are simulating.We also nd that using our run-time predictors result in mean wait timesUsing Run-Time Predictions to Estimate Queue Wait Times and Improve Scheduler Performance Warren

Feitelson, Dror

200

Nafion-sepiolite composite membranes for improved Proton Exchange Membrane Fuel Cell performance.  

E-Print Network [OSTI]

1 Nafion®-sepiolite composite membranes for improved Proton Exchange Membrane Fuel Cell performance, characterized and integrated in Membrane-Electrodes Assembly to be tested in fuel cell operating conditions, mobile or stationary), Proton Exchange Membrane Fuel Cells (PEMFC) are amongst the most studied fuel

Boyer, Edmond

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Designing a Practical Data Filter Cache to Improve Both Energy Efficiency and Performance  

E-Print Network [OSTI]

A Designing a Practical Data Filter Cache to Improve Both Energy Efficiency and Performance Alen Bardizbanyan, Chalmers University of Technology Magnus Sj¨alander, Florida State University David Whalley, Florida State University Per Larsson-Edefors, Chalmers University of Technology Conventional data filter

Whalley, David

202

USE OF VARIOUS DEVICE GEOMETRIES TO IMPROVE THE PERFORMANCE OF CdTe DETECTORS (*)  

E-Print Network [OSTI]

343 USE OF VARIOUS DEVICE GEOMETRIES TO IMPROVE THE PERFORMANCE OF CdTe DETECTORS (*) K. ZANIO. - The most direct method of increasing the resolution of CdTe gamma ray and x-ray detectors is to increase of Environmental and Biomedical Research. doped CdTe. Devices do not polarize as those having blocking contacts

Paris-Sud XI, Université de

203

Improving MPEG-4 coding performance by jointly optimising compression and blocking effect elimination  

E-Print Network [OSTI]

1 Improving MPEG-4 coding performance by jointly optimising compression and blocking effect and Information Engineering The Hong Kong Polytechnic University, Hong Kong ABSTRACT In most current block into account in the compression and the two processes can be jointly optimised. An example is also provided

Chan, Chris Y. H.

204

Phase-change materials to improve solar panel's performance Pascal Biwole1,2,*  

E-Print Network [OSTI]

-change materials to improve solar panel's performance Pascal Biwole1,2,* , Pierre Eclache3 , Frederic Kuznik3 1-mail:phbiwole@unice.fr Abstract: High operating temperatures induce a loss of efficiency in solar photovoltaic and thermal panels set-up. Results show that adding a PCM on the back of a solar panel can maintain the panel

205

Improving the Performance of High-Energy Physics Analysis through Bitmap Indices  

E-Print Network [OSTI]

Improving the Performance of High-Energy Physics Analysis through Bitmap Indices Kurt Stockinger1 for Nuclear Research CH-1211 Geneva, Switzerland {Kurt.Stockinger, Dirk.Duellmann, Wolfgang.Hoschek}@cern.ch 2 indices are popular multi-dimensional data struc- tures for accessing read-mostly data such as data

Hoschek, Wolfgang

206

A Hybrid Solid-State Storage Architecture for the Performance, Energy Consumption, and Lifetime Improvement  

E-Print Network [OSTI]

A Hybrid Solid-State Storage Architecture for the Performance, Energy Consumption, and Lifetime-place updating so that it significantly im- proves the usage efficiency of log pages by eliminating out- of results show that our proposed methods can substantially improve the perfor- mance, energy consumption

Giles, C. Lee

207

Improving performance of reflectance diffuse optical imaging using a multicentered mode  

E-Print Network [OSTI]

DOI, near-infrared light irradiates the brain tissues through optical fibers, and is received by detec- tors multicentered mode for arrangement of optical fibers to improve the imaging performance of reflectance dif- fuse, such overlapping measurements were mainly obtained by the geometric ar- rangement of optical fibers. Several

Jiang,Tianzi

208

Storage-Enabled Access Points for Improved Mobile Performance: An Evaluation Study  

E-Print Network [OSTI]

Networks and DTNs has been mainly con- cerned with storage and energy constraints for mobile devices and to which extend the storage and energy constraints can now be somewhat relaxed. We motivate our study basedStorage-Enabled Access Points for Improved Mobile Performance: An Evaluation Study Efthymios

Tsaoussidis, Vassilis

209

Develop feedback system for intelligent dynamic resource allocation to improve application performance.  

SciTech Connect (OSTI)

This report provides documentation for the completion of the Sandia Level II milestone 'Develop feedback system for intelligent dynamic resource allocation to improve application performance'. This milestone demonstrates the use of a scalable data collection analysis and feedback system that enables insight into how an application is utilizing the hardware resources of a high performance computing (HPC) platform in a lightweight fashion. Further we demonstrate utilizing the same mechanisms used for transporting data for remote analysis and visualization to provide low latency run-time feedback to applications. The ultimate goal of this body of work is performance optimization in the face of the ever increasing size and complexity of HPC systems.

Gentile, Ann C.; Brandt, James M.; Tucker, Thomas (Open Grid Computing, Inc., Austin, TX); Thompson, David

2011-09-01T23:59:59.000Z

210

Improving Cooling performance of the mechanical resonator with the two-level-system defects  

E-Print Network [OSTI]

We study cooling performance of a realistic mechanical resonator containing defects. The normal cooling method through an optomechanical system does not work efficiently due to those defects. We show by employing periodical $\\sigma_z$ pulses, we can eliminate the interaction between defects and their surrounded heat baths up to the first order of time. Compared with the cooling performance of no $\\sigma_z$ pulses case, much better cooling results are obtained. Moreover, this pulse sequence has an ability to improve the cooling performance of the resonator with different defects energy gaps and different defects damping rates.

Tian Chen; Xiang-Bin Wang

2014-06-03T23:59:59.000Z

211

Co-Designing Sustainable Communities: The Identification and Incorporation of Social Performance Metrics in Native American Sustainable Housing and Renewable Energy System Design  

E-Print Network [OSTI]

solar water heating Reduce energy consumption in buildings by using radiant water heating Improve community health by eliminating asthma triggers Table 14: Codes

Shelby, Ryan

2013-01-01T23:59:59.000Z

212

Input/Output of ab-initio nuclear structure calculations for improved performance and portability  

SciTech Connect (OSTI)

Many modern scientific applications rely on highly computation intensive calculations. However, most applications do not concentrate as much on the role that input/output operations can play for improved performance and portability. Parallelizing input/output operations of large files can significantly improve the performance of parallel applications where sequential I/O is a bottleneck. A proper choice of I/O library also offers a scope for making input/output operations portable across different architectures. Thus, use of parallel I/O libraries for organizing I/O of large data files offers great scope in improving performance and portability of applications. In particular, sequential I/O has been identified as a bottleneck for the highly scalable MFDn (Many Fermion Dynamics for nuclear structure) code performing ab-initio nuclear structure calculations. We develop interfaces and parallel I/O procedures to use a well-known parallel I/O library in MFDn. As a result, we gain efficient I/O of large datasets along with their portability and ease of use in the down-stream processing. Even situations where the amount of data to be written is not huge, proper use of input/output operations can boost the performance of scientific applications. Application checkpointing offers enormous performance improvement and flexibility by doing a negligible amount of I/O to disk. Checkpointing saves and resumes application state in such a manner that in most cases the application is unaware that there has been an interruption to its execution. This helps in saving large amount of work that has been previously done and continue application execution. This small amount of I/O provides substantial time saving by offering restart/resume capability to applications. The need for checkpointing in optimization code NEWUOA has been identified and checkpoint/restart capability has been implemented in NEWUOA by using simple file I/O.

Laghave, Nikhil

2010-12-15T23:59:59.000Z

213

Improving Rendering Performance by Texture-Map-Based Triangle Strips Yu Yang, Tulika Mitra and Huang Zhiyong  

E-Print Network [OSTI]

Improving Rendering Performance by Texture-Map-Based Triangle Strips Yu Yang, Tulika Mitra, Singapore 117543) Abstract Improving the rendering performance is a basic problem for computer graphics system. In this paper, we are aiming to investigate the impact on the rendering performance of some

Huang, Zhiyong

214

Integrated approach towards the Application of Horizontal Wells to Improve Waterflooding Performance. Annual report  

SciTech Connect (OSTI)

This annual report describes the progress during the first year of the project on Integrated Approach Towards the Application of Horizontal Wells to Improve Waterflooding Performance. This project is funded under the Department of Energy`s Class I program which is targeted towards improving the reservoir performance of mature oil fields located in fluvial-dominated deltaic deposits. The project involves an integrated approach to characterize the reservoir followed by drilling of horizontal injection wells to improve production performance. The type of data the authors intend to integrate includes cross bore hole seismic surveys, geological interpretation based on logs and cores, and engineering information. This report covers the first phase of the project which includes a detailed reservoir description of the field based on the available information, followed by flow simulation of the Self Unit to compare the simulated result with the historical performance. Based on the simulated results, a vertical test well was drilled to validate this reservoir description. The well will also be used as a source well for a cross bore hole seismic survey. This report discusses the related geophysical, geological and engineering activities leading to the drilling of the vertical test well. The validation phase and the collection of the cross bore hole survey has just begun, and the results will be presented in the next annual report.

Kelkar, M.; Liner, C.; Kerr, D.

1994-06-01T23:59:59.000Z

215

Cyber threat metrics.  

SciTech Connect (OSTI)

Threats are generally much easier to list than to describe, and much easier to describe than to measure. As a result, many organizations list threats. Fewer describe them in useful terms, and still fewer measure them in meaningful ways. This is particularly true in the dynamic and nebulous domain of cyber threats - a domain that tends to resist easy measurement and, in some cases, appears to defy any measurement. We believe the problem is tractable. In this report we describe threat metrics and models for characterizing threats consistently and unambiguously. The purpose of this report is to support the Operational Threat Assessment (OTA) phase of risk and vulnerability assessment. To this end, we focus on the task of characterizing cyber threats using consistent threat metrics and models. In particular, we address threat metrics and models for describing malicious cyber threats to US FCEB agencies and systems.

Frye, Jason Neal; Veitch, Cynthia K.; Mateski, Mark Elliot; Michalski, John T.; Harris, James Mark; Trevino, Cassandra M.; Maruoka, Scott

2012-03-01T23:59:59.000Z

216

A study on metrics for simulation programming languages  

E-Print Network [OSTI]

proposes models for metrics specially designed for use in simulation modeling which can help in evaluating the performance and resource requirements of simulation programming languages. Certain existing software metrics for general purpose programming... GPSS and SIMAN. With these characteristics and the existing metrics, models were developed for evaluation of software and hardware requirements for a given simulation problem. ACKNOWLEDGEMENTS I thank Dr. Sallie Sheppard, Chairperson of my committee...

Nallapati, Kumar V.

1986-01-01T23:59:59.000Z

217

Improvement of capabilities of the Distributed Electrochemistry Modeling Tool for investigating SOFC long term performance  

SciTech Connect (OSTI)

This report provides an overview of the work performed for Solid Oxide Fuel Cell (SOFC) modeling during the 2012 Winter/Spring Science Undergraduate Laboratory Internship at Pacific Northwest National Laboratory (PNNL). A brief introduction on the concept, operation basics and applications of fuel cells is given for the general audience. Further details are given regarding the modifications and improvements of the Distributed Electrochemistry (DEC) Modeling tool developed by PNNL engineers to model SOFC long term performance. Within this analysis, a literature review on anode degradation mechanisms is explained and future plans of implementing these into the DEC modeling tool are also proposed.

Gonzalez Galdamez, Rinaldo A.; Recknagle, Kurtis P.

2012-04-30T23:59:59.000Z

218

Improvement of speed control performance using PID type neurocontroller in an electric vehicle system  

SciTech Connect (OSTI)

In order to develop an efficient driving system for electric vehicle (EV), a testing system using motors has been built to simulate the driving performance of EVs. In the testing system, the PID (Proportional Integral Derivative) controller is used to control rotating speed of motor when the EV drives. In this paper, in order to improve the performance of speed control, a neural network is applied to tuning parameters of PID controller. It is shown, through experiments that a neural network can reduce output error effectively while the PID controller parameters are being tuned online. 6 refs.

Matsumura, S.; Omatu, S.; Higasa, H. [Shikoku Research Inst. Inc., Takamatsu (Japan)

1994-12-31T23:59:59.000Z

219

Integrated Approach Towards the Application of Horizontal Wells to Improve Waterflooding Performance  

SciTech Connect (OSTI)

This report is funded under the Department of Energy's Class I program which is targeted towards improving the reservoir performance of mature oil fields located in fluvially dominated deltaic geological environments. The project involves using an integrated approach to characterize the reservoir followed by proposing an approach reservoir management strategy to improve the field performance. In the first stage of the project, the type of data integrated includes cross bore hole seismic surveys, geological interpretation based on the logs and the cores, and the engineering information. In contrast, during the second stage of the project, it was intended to use only conventional data to construct the reservoir description. This report covers the results of the implementation from the first state of the project. It also discusses the work accomplished so far to the second stage of the project . The production from the Shelf Unit (location of Stage I) has sustained a significant increase over more than three years.

Kelkar, M.; Kerr, D.

1999-04-17T23:59:59.000Z

220

Performance Improvements to the Neutron Imaging System at the National Ignition Facility  

SciTech Connect (OSTI)

A team headed by LANL and including many members from LLNL and NSTec LO and NSTec LAO fielded a neutron imaging system (NIS) at the National Ignition Facility at the start of 2011. The NIS consists of a pinhole array that is located 32.5 cm from the source and that creates an image of the source in a segmented scintillator 28 m from the source. The scintillator is viewed by two gated, optical imaging systems: one that is fiber coupled, and one that is lens coupled. While there are a number of other pieces to the system related to pinhole alignment, collimation, shielding and data acquisition, those pieces are discussed elsewhere and are not relevant here. The system is operational and has successfully obtained data on more that ten imaging shots. This remainder of this whitepaper is divided in five main sections. In Section II, we identify three critical areas of improvement that we believe should be pursued to improve the performance of the system for future experiments: spatial resolution, temporal response and signal-to-noise ratio. In Section III, we discuss technologies that could be used to improve these critical performance areas. In Section IV, we describe a path to evolve the current system to achieve improved performance with minimal impact on the ability of the system to operate on shots. In Section V, we discuss the abilities, scope and timescales of the current teams and the Commissariat energie atomique (CEA). In Section VI, we summarize and make specific recommendations for collaboration on improvements to the NIS.

Fittinghoff, D N; Bower, D E; Drury, O B; Dzenitis, J M; Hatarik, R; Merrill, F E; Grim, G P; Wilde, C H; Wilson, D C; Landoas, O; Caillaud, T; Bourgade, J; Buckles, R A; Lee, J; Weiss, P B

2011-09-26T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Improving performance of transmission control protocol (TCP) over mobile wireless networks  

E-Print Network [OSTI]

) August 1996 Major Subject: Computer Science ABSTRACT Improving Performance of Transmission Control Protocol (TCP) over Mobile Wireless Networks. (August 1996) Bikram Singli Balrshi, B. Tech. , Delhi Institute of Technology Chair of Advisory.... Explicit Bad State Notification (EBSN) . d. EBSN in Local-Area Wireless Networks . D. Results and Discussion 1. Wide-Area Wireless Networks . 2. Local-Area Wireless Networks SEAMLESS COMMUNICATION IN MOBILE WIRELESS NETWORKS A. Summary of Previous...

Bakshi, Bikram Singh

1996-01-01T23:59:59.000Z

222

Improving Steam System Performance: A Sourcebook for Industry, Second Edition (Book) (Revised)  

SciTech Connect (OSTI)

Improving Steam System Performance: A Sourcebook for Industry was developed for the U.S. Department of Energy's (DOE) Advanced Manufacturing Office (AMO), formerly the Industrial Technologies Program. AMO undertook this project as a series of sourcebook publications. Other topics in this series include: compressed air systems, pumping systems, fan systems, process heating and motor and drive systems. For more information about program resources, see AMO in the Where to Find Help section of this publication.

Not Available

2012-10-01T23:59:59.000Z

223

Improving Process Heating System Performance: A Sourcebook for Industry, Second Edition. Industrial Technologies Program (ITP) (Book)  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe U.S. Improving Fan System Performance a

224

Resilient Control Systems Practical Metrics Basis for Defining Mission Impact  

SciTech Connect (OSTI)

"Resilience” describes how systems operate at an acceptable level of normalcy despite disturbances or threats. In this paper we first consider the cognitive, cyber-physical interdependencies inherent in critical infrastructure systems and how resilience differs from reliability to mitigate these risks. Terminology and metrics basis are provided to integrate the cognitive, cyber-physical aspects that should be considered when defining solutions for resilience. A practical approach is taken to roll this metrics basis up to system integrity and business case metrics that establish “proper operation” and “impact.” A notional chemical processing plant is the use case for demonstrating how the system integrity metrics can be applied to establish performance, and

Craig G. Rieger

2014-08-01T23:59:59.000Z

225

Surface Treatments for Improved Performance of Spinel-coated AISI 441 Ferritic Stainless Steel  

SciTech Connect (OSTI)

Ferritic stainless steels are promising candidates for IT-SOFC interconnect applications due to their low cost and resistance to oxidation at SOFC operating temperatures. However, steel candidates face several challenges; including long term oxidation under interconnect exposure conditions, which can lead to increased electrical resistance, surface instability, and poisoning of cathodes due to volatilization of Cr. To potentially extend interconnect lifetime and improve performance, a variety of surface treatments were performed on AISI 441 ferritic stainless steel coupons prior to application of a protective spinel coating. The coated coupons were then subjected to oxidation testing at 800 and 850°C in air, and electrical testing at 800°C in air. While all of the surface-treatments resulted in improved surface stability (i.e., increased spallation resistance) compared to untreated AISI 441, the greatest degree of improvement (through 20,000 hours of testing at 800°C and 14,000 hours of testing at 850°C) was achieved by surface blasting.

Stevenson, Jeffry W.; Riel, Eric M.; Stephens, Elizabeth V.; Khaleel, Mohammad A.

2013-01-01T23:59:59.000Z

226

Evaluation of the Design Metric to Reduce the Number of Defects in Software Development  

E-Print Network [OSTI]

Software design is one of the most important and key activities in the system development life cycle (SDLC) phase that ensures the quality of software. Different key areas of design are very vital to be taken into consideration while designing software. Software design describes how the software system is decomposed and managed in smaller components. Object-oriented (OO) paradigm has facilitated software industry with more reliable and manageable software and its design. The quality of the software design can be measured through different metrics such as Chidamber and Kemerer (CK) design metrics, Mood Metrics & Lorenz and Kidd metrics. CK metrics is one of the oldest and most reliable metrics among all metrics available to software industry to evaluate OO design. This paper presents an evaluation of CK metrics to propose an improved CK design metrics values to reduce the defects during software design phase in software. This paper will also describe that whether a significant effect of any CK design metri...

Qureshi, M Rizwan Jameel; 10.5815/ijitcs.2012.04.02

2012-01-01T23:59:59.000Z

227

Improving shop floor visualization and metrics  

E-Print Network [OSTI]

Within the Technical Operations division of Novartis Pharmaceuticals, there is an aggressive vision to be the "Toyota" of the Pharma Industry by 2010. To accomplish this, PharmOps Switzerland has embraced operational ...

Lawler, Maureen E. (Maureen Elizabeth)

2010-01-01T23:59:59.000Z

228

Clean Cities 2010 Annual Metrics Report  

SciTech Connect (OSTI)

This report details the petroleum savings and vehicle emissions reductions achieved by the U.S. Department of Energy's Clean Cities program in 2010. The report also details other performance metrics, including the number of stakeholders in Clean Cities coalitions, outreach activities by coalitions and national laboratories, and alternative fuel vehicles deployed.

Johnson, C.

2012-10-01T23:59:59.000Z

229

Clean Cities 2011 Annual Metrics Report  

SciTech Connect (OSTI)

This report details the petroleum savings and vehicle emissions reductions achieved by the U.S. Department of Energy's Clean Cities program in 2011. The report also details other performance metrics, including the number of stakeholders in Clean Cities coalitions, outreach activities by coalitions and national laboratories, and alternative fuel vehicles deployed.

Johnson, C.

2012-12-01T23:59:59.000Z

230

Farm Buildings Pocketbook in Metric   

E-Print Network [OSTI]

Some useful advice giving standards, dimensions and data in metric for those interested in the design of farm buildings

Anonymous

1971-01-01T23:59:59.000Z

231

Modular Approach for Continuous Cell-Level Balancing to Improve Performance of Large Battery Packs: Preprint  

SciTech Connect (OSTI)

Energy storage systems require battery cell balancing circuits to avoid divergence of cell state of charge (SOC). A modular approach based on distributed continuous cell-level control is presented that extends the balancing function to higher level pack performance objectives such as improving power capability and increasing pack lifetime. This is achieved by adding DC-DC converters in parallel with cells and using state estimation and control to autonomously bias individual cell SOC and SOC range, forcing healthier cells to be cycled deeper than weaker cells. The result is a pack with improved degradation characteristics and extended lifetime. The modular architecture and control concepts are developed and hardware results are demonstrated for a 91.2-Wh battery pack consisting of four series Li-ion battery cells and four dual active bridge (DAB) bypass DC-DC converters.

Muneed ur Rehman, M.; Evzelman, M.; Hathaway, K.; Zane, R.; Plett, G. L.; Smith, K.; Wood, E.; Maksimovic, D.

2014-10-01T23:59:59.000Z

232

Performance improvement study of a relativistic magnetron using MAGIC-3D  

SciTech Connect (OSTI)

A three dimensional particle-in-cell (PlC) code, MAGIC3D, is used to examine the performance improvement in a relativistic magnetron by perturbing technique. Asymmetrical metal rods of different length have been used to perturb the magnetic field in the annular sector of the resonant system. Enhancement up to 45% in the radiated output power has been obtained in the perturbed magnetic field case over the unperturbed one. It has also been found in the simulation that oscillation start up time is reduced by 16 %, and the amplitude of the nearest competing mode goes down 9dB compared to unperturbed case. Perturbed magnetic field also reduces the end caps current improving the efficiency. (author)

Maurya, S.; Singh, V.V.P., E-mail: smaurya@ceeri.ernet.in [Central Electronics Engineering Research Institute, Council of Scientific and Industrial Research, Pilani (India); Jain, P.K. [Center of Research in Microwave Tubes, Institute of Technology, Banaras Hindu University, Varanasi (India)

2011-07-01T23:59:59.000Z

233

PERFORMANCE IMPROVEMENTS IN COMMERCIAL HEAT PUMP WATER HEATERS USING CARBON DIOXIDE  

SciTech Connect (OSTI)

Although heat pump water heaters are today widely accepted in Japan, where energy costs are high and government incentives for their use exist, acceptance of such a product in the U.S. has been slow. This trend is slowly changing with the introduction of heat pump water heaters into the residential market, but remains in the commercial sector. Barriers to heat pump water heater acceptance in the commercial market have historically been performance, reliability and first/operating costs. The use of carbon dioxide (R744) as the refrigerant in such a system can improve performance for relatively small increase in initial cost and make this technology more appealing. What makes R744 an excellent candidate for use in heat pump water heaters is not only the wide range of ambient temperatures within which it can operate, but also the excellent ability to match water to refrigerant temperatures on the high side, resulting in very high exit water temperatures of up to 82�ºC (180�ºF), as required by sanitary codes in the U.S.(Food Code, 2005), in a single pass, temperatures that are much more difficult to reach with other refrigerants. This can be especially attractive in applications where this water is used for the purpose of sanitation. While reliability has also been of concern historically, dramatic improvements have been made over the last several years through research done in the automotive industry and commercialization of R744 technology in residential water heating mainly in Japan. This paper presents the performance results from the development of an R744 commercial heat pump water heater of approximately 35kW and a comparison to a baseline R134a unit of the same capacity and footprint. In addition, recommendations are made for further improvements of the R744 system which could result in possible energy savings of up to 20%.

BOWERS C.D.; ELBEL S.; PETERSEN M.; HRNJAK P.S.

2011-07-01T23:59:59.000Z

234

System and method for improving performance of a fluid sensor for an internal combustion engine  

DOE Patents [OSTI]

A system and method for improving sensor performance of an on-board vehicle sensor, such as an exhaust gas sensor, while sensing a predetermined substance in a fluid flowing through a pipe include a structure for extending into the pipe and having at least one inlet for receiving fluid flowing through the pipe and at least one outlet generally opposite the at least one inlet, wherein the structure redirects substantially all fluid flowing from the at least one inlet to the sensor to provide a representative sample of the fluid to the sensor before returning the fluid through the at least one outlet.

Kubinski, David (Canton, MI); Zawacki, Garry (Livonia, MI)

2009-03-03T23:59:59.000Z

235

Cleanroom Energy Efficiency: Metrics and Benchmarks  

SciTech Connect (OSTI)

Cleanrooms are among the most energy-intensive types of facilities. This is primarily due to the cleanliness requirements that result in high airflow rates and system static pressures, as well as process requirements that result in high cooling loads. Various studies have shown that there is a wide range of cleanroom energy efficiencies and that facility managers may not be aware of how energy efficient their cleanroom facility can be relative to other cleanroom facilities with the same cleanliness requirements. Metrics and benchmarks are an effective way to compare one facility to another and to track the performance of a given facility over time. This article presents the key metrics and benchmarks that facility managers can use to assess, track, and manage their cleanroom energy efficiency or to set energy efficiency targets for new construction. These include system-level metrics such as air change rates, air handling W/cfm, and filter pressure drops. Operational data are presented from over 20 different cleanrooms that were benchmarked with these metrics and that are part of the cleanroom benchmark dataset maintained by Lawrence Berkeley National Laboratory (LBNL). Overall production efficiency metrics for cleanrooms in 28 semiconductor manufacturing facilities in the United States and recorded in the Fabs21 database are also presented.

International SEMATECH Manufacturing Initiative; Mathew, Paul A.; Tschudi, William; Sartor, Dale; Beasley, James

2010-07-07T23:59:59.000Z

236

Gas cofiring in coal-fired stokers for emissions reduction and performance improvement  

SciTech Connect (OSTI)

Adding gas burners above the grate of a coal-fired stoker can be an economical method of reducing gaseous and particulate emissions and improving efficiency and operational flexibility. With this cofiring configuration, the improved heat distribution and mixing with the stoker combustion products can give reduced opacity, reduced emissions of particulate, NO{sub x} and SO{sub 2}, improved carbon burnout and lower overall ash, reduced excess air, faster load response, cleaner and quicker lightoffs, improved turndown at both lower and upper capacity limits, and improved performance with problematic coals. To develop and validate the cofiring technology, three cofire field experiments have been conducted. A 165,000 lb/hr spreader stoker and mass feed chain grate stokers rated at 40,000 and 75,000 lb/hr have been retrofit with gas burners and tested in the field. The two larger units used dual, opposed burners, while the smaller unit was retrofit with a single burner. With the spreader stoker, the primary benefits of gas cofire was reduction in opacity episodes with coal quality variability and recovery of lost derate. With the larger chain grate unit, the primary benefit was reduction of NO{sub x} and SO{sub 2} to within Title V limits and elimination of opacity episodes during startup and load swings. With the smaller chain grate, the primary benefit was ability to operate at low loads without unacceptable opacity excursions which had previously required a backup boiler. In all cases, the economics justified the capital burner system retrofit cost and incremental fuel costs.

Mason, H.B.; Drennan, S.; Chan, I.; Kinney, W.L.; Borland, D.

1996-12-31T23:59:59.000Z

237

All conformally flat pure radiation metrics  

E-Print Network [OSTI]

The complete class of conformally flat, pure radiation metrics is given, generalising the metric recently given by Wils.

S. Brian Edgar; Garry Ludwig

1996-12-20T23:59:59.000Z

238

Improving thermosyphon solar domestic hot water system model performance. Final report, March 1994--February 1995  

SciTech Connect (OSTI)

Data from an indoor solar simulator experimental performance test is used to develop a systematic calibration procedure for a computer model of a thermosyphoning, solar domestic hot water heating system with a tank-in-tank heat exchanger. Calibration is performed using an indoor test with a simulated solar collector to adjust heat transfer in the heat exchanger and heat transfer between adjacent layers of water in the storage tank. An outdoor test is used to calibrate the calculation of the friction drop in the closed collector loop. Additional indoor data with forced flow in the annulus of the heat exchanger leads to improved heat transfer correlations for the inside and outside regions of the tank-in-tank heat exchanger. The calibrated simulation model is compared to several additional outdoor tests both with and without auxiliary heating. Integrated draw energies are predicted with greater accuracy and draw temperature profiles match experimental results to a better degree. Auxiliary energy input predictions improve significantly. 63 figs., 29 tabs.

Swift, T.N.

1996-09-01T23:59:59.000Z

239

Improving the dynamic performance of a complex AC/DC system by HVDC control modifications  

SciTech Connect (OSTI)

The power system of Hydro-Quebec has a peak load of approximately 27 GW. The great distance between the production sites and the load centers introduces stability limitations, which is the reason why the Quebec grid cannot be economically synchronized (through ac transmission with limited capacity) with the U.S. northeastern network. Power exports are therefore dependent on the use of HVDC links of which Hydro-Quebec now possesses five, for a capacity of over 2600 MW. Such a capacity will again soon increase. At the moment, the Chateauguay scheme has the largest HVDC capacity. It transfers 1000 MW by means of two Back-to-Back converter blocks. Various automatic control systems are installed on the Chateauguay scheme owing to the fact that a single circuit of a 765 kV ac line transmits the output of both the HVDC converter stations as well as the output from Beauharnois hydro generating station. Such controls have performed satisfactorily since 1984. However, a remarkable improvement of the overall ac/dc system dynamic performance can be gained by making certain modifications in some of these HVDC system controls. This paper presents the salient features of such control modifications, currently under consideration, using the results of an investigation by digital and analogue simulations that demonstrate the achieved improvements.

Hammad, A.E. (ABB Power Systems, Baden (CH)); Gagnon, J. (Hydro Quebec, Montreal (CA)); McCallum, D. (IREQ, Montreal (CA))

1990-10-01T23:59:59.000Z

240

Method and apparatus for improving the performance of a nuclear power electrical generation system  

DOE Patents [OSTI]

A method and apparatus for improving the efficiency and performance a of nuclear electrical generation system that comprises the addition of steam handling equipment to an existing plant that results in a surprising increase in plant performance. More particularly, a gas turbine electrical generation system with heat recovery boiler is installed along with a high pressure and a low pressure mixer superheater. Depending upon plant characteristics, the existing moisture separator reheater (MSR) can be either augmented or done away with. The instant invention enables a reduction in T.sub.hot without a derating of the reactor unit, and improves efficiency of the plant's electrical conversion cycle. Coupled with this advantage is a possible extension of the plant's fuel cycle length due to an increased electrical conversion efficiency. The reduction in T.sub.hot further allows for a surprising extension of steam generator life. An additional advantage is the reduction in erosion/corrosion of secondary system components including turbine blades and diaphragms. The gas turbine generator used in the instant invention can also replace or augment existing peak or emergency power needs.

Tsiklauri, Georgi V. (Richland, WA); Durst, Bruce M. (Kennewick, WA)

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Feed-pump hydraulic performance and design improvement, Phase I: research program design. Final report  

SciTech Connect (OSTI)

As a result of prior EPRI-sponsored studies, it was concluded that a research program should be designed and implemented to provide an improved basis for the design, procurement, testing, and operation of large feed pumps with increased reliability and stability over the full range of operating conditions. This two-volume report contains a research plan which is based on a review of the present state of the art and which defines the necessary R and D program and estimates the benefits and costs of the program. The recommended research program consists of 30 interrelated tasks. It is designed to perform the needed research; to verify the results; to develop improved components; and to publish computer-aided design methods, pump specification guidelines, and a troubleshooting manual. Most of the technology proposed in the research plan is applicable to nuclear power plants as well as to fossil-fired plants. This volume discusses the design, performance and failures of feed pumps, and recommendations for research on pump dynamics, design, and specifications.

Brown, W.H.; Gopalakrishnan, S.; Fehlau, R.; Thompson, W.E.; Wilson, D.G.

1982-03-01T23:59:59.000Z

242

Method and apparatus for improving the performance of a steam driven power system by steam mixing  

DOE Patents [OSTI]

A method and apparatus for improving the efficiency and performance of a steam driven power plant wherein addition of steam handling equipment to an existing plant results in a surprising increase in plant performance. For Example, a gas turbine electrical generation system with heat recovery boiler may be installed along with a micro-jet high pressure and a low pressure mixer superheater. Depending upon plant characteristics, the existing moisture separator reheater (MSR) can be either augmented or done away with. The instant invention enables a reduction in T.sub.hot without a derating of the reactor unit, and improves efficiency of the plant's electrical conversion cycle. Coupled with this advantage is a possible extension of the plant's fuel cycle length due to an increased electrical conversion efficiency. The reduction in T.sub.hot further allows for a surprising extension of steam generator life. An additional advantage is the reduction in erosion/corrosion of secondary system components including turbine blades and diaphragms. The gas turbine generator used in the instant invention can also replace or augment existing peak or emergency power needs. Another benefit of the instant invention is the extension of plant life and the reduction of downtime due to refueling.

Tsiklauri, Georgi V. (Richland, WA); Durst, Bruce M. (Kennewick, WA); Prichard, Andrew W. (Richland, WA); Reid, Bruce D. (Pasco, WA); Burritt, James (Virginia Beach, VA)

1998-01-01T23:59:59.000Z

243

Improving Secure Server Performance by Re-balancing SSL/TLS Claude Castelluccia, Einar Mykletun, Gene Tsudik  

E-Print Network [OSTI]

Improving Secure Server Performance by Re-balancing SSL/TLS Handshakes Claude Castelluccia, Einar of each SSL handshake. Since most SSL-enabled servers use RSA, the burden of performing many costly to perform commensurately less work, thus resulting in better SSL throughput. Proposed tech- niques are based

244

Systems Study for Improving Gas Turbine Performance for Coal/IGCC Application  

SciTech Connect (OSTI)

This study identifies vital gas turbine (GT) parameters and quantifies their influence in meeting the DOE Turbine Program overall Integrated Gasification Combined Cycle (IGCC) plant goals of 50% net HHV efficiency, $1000/kW capital cost, and low emissions. The project analytically evaluates GE advanced F class air cooled technology level gas turbine conceptual cycle designs and determines their influence on IGCC plant level performance including impact of Carbon capture. This report summarizes the work accomplished in each of the following six Tasks. Task 1.0--Overall IGCC Plant Level Requirements Identification: Plant level requirements were identified, and compared with DOE's IGCC Goal of achieving 50% Net HHV Efficiency and $1000/KW by the Year 2008, through use of a Six Sigma Quality Functional Deployment (QFD) Tool. This analysis resulted in 7 GT System Level Parameters as the most significant. Task 2.0--Requirements Prioritization/Flow-Down to GT Subsystem Level: GT requirements were identified, analyzed and prioritized relative to achieving plant level goals, and compared with the flow down of power island goals through use of a Six Sigma QFD Tool. This analysis resulted in 11 GT Cycle Design Parameters being selected as the most significant. Task 3.0--IGCC Conceptual System Analysis: A Baseline IGCC Plant configuration was chosen, and an IGCC simulation analysis model was constructed, validated against published performance data and then optimized by including air extraction heat recovery and GE steam turbine model. Baseline IGCC based on GE 207FA+e gas turbine combined cycle has net HHV efficiency of 40.5% and net output nominally of 526 Megawatts at NOx emission level of 15 ppmvd{at}15% corrected O2. 18 advanced F technology GT cycle design options were developed to provide performance targets with increased output and/or efficiency with low NOx emissions. Task 4.0--Gas Turbine Cycle Options vs. Requirements Evaluation: Influence coefficients on 4 key IGCC plant level parameters (IGCC Net Efficiency, IGCC Net Output, GT Output, NOx Emissions) of 11 GT identified cycle parameters were determined. Results indicate that IGCC net efficiency HHV gains up to 2.8 pts (40.5% to 43.3%) and IGCC net output gains up to 35% are possible due to improvements in GT technology alone with single digit NOx emission levels. Task 5.0--Recommendations for GT Technical Improvements: A trade off analysis was conducted utilizing the performance results of 18 gas turbine (GT) conceptual designs, and three most promising GT candidates are recommended. A roadmap for turbine technology development is proposed for future coal based IGCC power plants. Task 6.0--Determine Carbon Capture Impact on IGCC Plant Level Performance: A gas turbine performance model for high Hydrogen fuel gas turbine was created and integrated to an IGCC system performance model, which also included newly created models for moisturized syngas, gas shift and CO2 removal subsystems. This performance model was analyzed for two gas turbine technology based subsystems each with two Carbon removal design options of 85% and 88% respectively. The results show larger IGCC performance penalty for gas turbine designs with higher firing temperature and higher Carbon removal.

Ashok K. Anand

2005-12-16T23:59:59.000Z

245

Degenerate Metric Phase Boundaries  

E-Print Network [OSTI]

The structure of boundaries between degenerate and nondegenerate solutions of Ashtekar's canonical reformulation of Einstein's equations is studied. Several examples are given of such "phase boundaries" in which the metric is degenerate on one side of a null hypersurface and non-degenerate on the other side. These include portions of flat space, Schwarzschild, and plane wave solutions joined to degenerate regions. In the last case, the wave collides with a planar phase boundary and continues on with the same curvature but degenerate triad, while the phase boundary continues in the opposite direction. We conjecture that degenerate phase boundaries are always null.

Ingemar Bengtsson; Ted Jacobson

1999-01-23T23:59:59.000Z

246

Improved performance of U-Mo dispersion fuel by Si addition in Al matrix.  

SciTech Connect (OSTI)

The purpose of this report is to collect in one publication and fit together work fragments presented in many conferences in the multi-year time span starting 2002 to the present dealing with the problem of large pore formation in U-Mo/Al dispersion fuel plates first observed in 2002. Hence, this report summarizes the excerpts from papers and reports on how we interpreted the relevant results from out-of-pile and in-pile tests and how this problem was dealt with. This report also provides a refined view to explain in detail and in a quantitative manner the underlying mechanism of the role of silicon in improving the irradiation performance of U-Mo/Al.

Kim, Y S; Hofman, G L [Nuclear Engineering Division

2011-06-01T23:59:59.000Z

247

Qtier-Rapor: Managing Spreadsheet Systems & Improving Corporate Performance, Compliance and Governance  

E-Print Network [OSTI]

Much of what EuSpRIG discusses is concerned with the integrity of individual spreadsheets. In businesses, interlocking spreadsheets are regularly used to fill functional gaps in core administrative systems. The growth and deployment of such integrated spreadsheet SYSTEMS raises the scale of issues to a whole new level. The correct management of spreadsheet systems is necessary to ensure that the business achieves its goals of improved performance and good corporate governance, within the constraints of legislative compliance - poor management will deliver the opposite. This paper is an anatomy of the real-life issues of the commercial use of spreadsheets in business, and demonstrates how Qtier-Rapor has been used to instil best practice in the use of integrated commercial spreadsheet systems.

Bishop, Keith

2008-01-01T23:59:59.000Z

248

Using MPI File Caching to Improve Parallel Write Performance for Large-Scale Scientific Applications  

SciTech Connect (OSTI)

Typical large-scale scientific applications periodically write checkpoint files to save the computational state throughout execution. Existing parallel file systems improve such write-only I/O patterns through the use of clientside file caching and write-behind strategies. In distributed environments where files are rarely accessed by more than one client concurrently, file caching has achieved significant success; however, in parallel applications where multiple clients manipulate a shared file, cache coherence control can serialize I/O. We have designed a thread based caching layer for the MPI I/O library, which adds a portable caching system closer to user applications so more information about the application's I/O patterns is available for better coherence control. We demonstrate the impact of our caching solution on parallel write performance with a comprehensive evaluation that includes a set of widely used I/O benchmarks and production application I/O kernels.

Liao, Wei-keng [Northwestern University, Evanston; Ching, Avery [Northwestern University, Evanston; Coloma, Kenin [Northwestern University, Evanston; Nisar, Arifa [Northwestern University, Evanston; Choudhary, Alok [Northwestern University, Evanston; Chen, Jackie [Sandia National Laboratories (SNL); Sankaran, Ramanan [ORNL; Klasky, Scott A [ORNL

2007-01-01T23:59:59.000Z

249

Using MPI file caching to improve parallel write performance for large-scale scientific applications  

SciTech Connect (OSTI)

Typical large-scale scientific applications periodically write checkpoint files to save the computational state throughout execution. Existing parallel file systems improve such write-only I/O patterns through the use of client-side file caching and write-behind strategies. In distributed environments where files are rarely accessed by more than one client concurrently, file caching has achieved significant success; however, in parallel applications where multiple clients manipulate a shared file, cache coherence control can serialize I/O. We have designed a thread based caching layer for the MPI I/O library, which adds a portable caching system closer to user applications so more information about the application's I/O patterns is available for better coherence control. We demonstrate the impact of our caching solution on parallel write performance with a comprehensive evaluation that includes a set of widely used I/O benchmarks and production application I/O kernels.

Sankaran, Ramanan [ORNL; Liao, Wei-Keng [ORNL; Chen, Jacqueline H [Sandia National Laboratories (SNL); Klasky, Scott A [ORNL; Choudhary, Alok [Northwestern University, Evanston

2007-01-01T23:59:59.000Z

250

Pulsed laser deposition of Mn doped CdSe quantum dots for improved solar cell performance  

SciTech Connect (OSTI)

In this work, we demonstrate (1) a facile method to prepare Mn doped CdSe quantum dots (QDs) on Zn{sub 2}SnO{sub 4} photoanodes by pulsed laser deposition and (2) improved device performance of quantum dot sensitized solar cells of the Mn doped QDs (CdSe:Mn) compared to the undoped QDs (CdSe). The band diagram of photoanode Zn{sub 2}SnO{sub 4} and sensitizer CdSe:Mn QD is proposed based on the incident-photon-to-electron conversion efficiency (IPCE) data. Mn-modified band structure leads to absorption at longer wavelengths than the undoped CdSe QDs, which is due to the exchange splitting of the CdSe:Mn conduction band by the Mn dopant. Three-fold increase in the IPCE efficiency has also been observed for the Mn doped samples.

Dai, Qilin; Wang, Wenyong, E-mail: wwang5@uwyo.edu, E-mail: jtang2@uwyo.edu; Tang, Jinke, E-mail: wwang5@uwyo.edu, E-mail: jtang2@uwyo.edu [Department of Physics and Astronomy, University of Wyoming, Laramie, Wyoming 82071 (United States); Sabio, Erwin M. [Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071 (United States)

2014-05-05T23:59:59.000Z

251

New electrolytes and electrolyte additives to improve the low temperature performance of lithium-ion batteries  

SciTech Connect (OSTI)

In this program, two different approaches were undertaken to improve the role of electrolyte at low temperature performance - through the improvement in (i) ionic conductivity and (ii) interfacial behavior. Several different types of electrolytes were prepared to examine the feasibil.ity of using these new electrolytes in rechargeable lithium-ion cells in the temperature range of +40°C to -40°C. The feasibility studies include (a) conductivity measurements of the electrolytes, (b) impedance measurements of lithium-ion cells using the screened electrolytes with di.fferent electrochemical history such as [(i) fresh cells prior to formation cycles, (ii) after first charge, and (iii) after first discharge], (c) electrical performance of the cells at room temperatures, and (d) charge discharge behavior at various low temperatures. Among the different types of electrolytes investigated in Phase I and Phase II of this SBIR project, carbonate-based LiPF6 electrolytes with the proposed additives and the low viscous ester as a third component to the carbonate-based LiPF6 electrolytes show promising results at low temperatures. The latter electrolytes deliver over 80% of room temperature capacity at -20{degrees}C when the lithium-ion cells containing these electrolytes were charged at -20 °C. Also, there was no lithium plating when the lithium­-ion cells using C-C composite anode and LiPF{sub 6} in EC/EMC/MP electrolyte were charged at -20{degrees}C at C/5 rate. The studies of ionic conductivity and AC impedance of these new electrolytes, as well as the charge discharge characteristics of lithium-ion cells using these new electrolytes at various low temperatures provide new findings: The reduced capacity and power capability, as well as the problem of lithium plating at low temperatures charging of lithium-ion cells are primarily due to slow the lithium-ion intercalation/de-intercalation kinetics in the carbon structure.

Yang, Xiao-Qing

2008-08-31T23:59:59.000Z

252

Mobile Home Node: Improving Directory Cache Coherence Performance in NoCs via Exploitation of Producer-Consumer Relationships  

E-Print Network [OSTI]

MOBILE HOME NODE: IMPROVING DIRECTORY CACHE COHERENCE PERFORMANCE IN NOCS VIA EXPLOITATION OF PRODUCER-CONSUMER RELATIONSHIPS A Thesis by TARUN SONI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 2010 Major Subject: Computer Engineering MOBILE HOME NODE: IMPROVING DIRECTORY CACHE COHERENCE PERFORMANCE IN NOCS VIA EXPLOITATION OF PRODUCER-CONSUMER RELATIONSHIPS A Thesis by TARUN SONI...

Soni, Tarun

2011-10-21T23:59:59.000Z

253

Improvement of the Performance for an Absorption Refrigeration System with Lithium bromide-water as Refrigerant by Increasing Absorption Pressure  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency, Vol. IV-10-4 Improvement of the Performance for an Absorption Refrigerating System with Lithium bromide-water as Refrigerant by Increasing Absorption... in order to lay a theoretical foundation of improving the performance of whole LBAC. 2. THE PRINCIPLE OF ENHANCING ABSORPTION EFFICIENCY OF THE ABSORBER It is well known that the absorption of ICEBO2006, Shenzhen, China HVAC...

Xie, G.; Sheng, G.; Li, G.; Pan, S.

2006-01-01T23:59:59.000Z

254

Advanced Energy Retrofit Guide: Practical Ways to Improve Energy Performance, K-12 Schools (Book)  

SciTech Connect (OSTI)

The U.S. Department of Energy developed the Advanced Energy Retrofit Guides (AERGs) to provide specific methodologies, information, and guidance to help energy managers and other stakeholders plan and execute energy efficiency improvements. Detailed technical discussion is fairly limited. Instead, we emphasize actionable information, practical methodologies, diverse case studies, and unbiased evaluations of the most promising retrofit energy efficiency measures for each building type. A series of AERGs is under development, addressing key segments of the commercial building stock. K-12 schools were selected as one of the highest priority building sectors, because schools affect the lives of most Americans. They also represent approximately 8% of the energy use and 10% of the floor area in commercial buildings nationwide. U.S. K-12 school districts spend more than $8 billion each year on energy - more than they spend on computers and textbooks combined. Most occupy older buildings that often have poor operational performance - more than 30% of schools were built before 1960. The average age of a school is about 42 years - which is nearly the expected serviceable lifespan of the building. K-12 schools offer unique opportunities for deep, cost-effective energy efficiency improvements, and this guide provides convenient and practical guidance for exploiting these opportunities in the context of public, private, and parochial schools.

Not Available

2013-12-01T23:59:59.000Z

255

Continuous Improvement of H-Mode Discharge Performance with Progressively Increasing Lithium Coatings in the National Spherical Torus Experiment  

E-Print Network [OSTI]

-wall interactions. Recently, there is growing use of lithium coatings, in particular, to control edge recyclingContinuous Improvement of H-Mode Discharge Performance with Progressively Increasing Lithium September 2011) Lithium wall coatings have been shown to reduce recycling, improve energy confinement

Princeton Plasma Physics Laboratory

256

Objective 1: Extend Life, Improve Performance, and Maintain Safety of the Current Fleet Implementation Plan  

SciTech Connect (OSTI)

Nuclear power has reliably and economically contributed almost 20% of electrical generation in the United States over the past two decades. It remains the single largest contributor (more than 70%) of non-greenhouse-gas-emitting electric power generation in the United States. By the year 2030, domestic demand for electrical energy is expected to grow to levels of 16 to 36% higher than 2007 levels. At the same time, most currently operating nuclear power plants will begin reaching the end of their 60 year operating licenses. Figure E 1 shows projected nuclear energy contribution to the domestic generating capacity. If current operating nuclear power plants do not operate beyond 60 years, the total fraction of generated electrical energy from nuclear power will begin to decline—even with the expected addition of new nuclear generating capacity. The oldest commercial plants in the United States reached their 40th anniversary in 2009. The U.S. Department of Energy Office of Nuclear Energy’s Research and Development (R&D) Roadmap has organized its activities in accordance with four objectives that ensure nuclear energy remains a compelling and viable energy option for the United States. The objectives are as follows: (1) develop technologies and other solutions that can improve the reliability, sustain the safety, and extend the life of the current reactors; (2) develop improvements in the affordability of new reactors to enable nuclear energy to help meet the Administration’s energy security and climate change goals; (3) develop sustainable nuclear fuel cycles; and (4) understand and minimize risks of nuclear proliferation and terrorism. The Light Water Reactor Sustainability (LWRS) Program is the primary programmatic activity that addresses Objective 1. This document describes how Objective 1 and the LWRS Program will be implemented. The existing U.S. nuclear fleet has a remarkable safety and performance record and today accounts for 70% of the low greenhouse gas emitting domestic electricity production. Extending the operating lifetimes of current plants beyond 60 years and, where possible, making further improvements in their productivity will generate early benefits from research, development, and demonstration investments in nuclear power. DOE’s role in Objective 1 is to partner with industry and the Nuclear Regulatory Commission in appropriate ways to support and conduct the long-term research needed to inform major component refurbishment and replacement strategies, performance enhancements, plant license extensions, and age-related regulatory oversight decisions. The DOE research, development, and demonstration role will focus on aging phenomena and issues that require long-term research and are generic to reactor type. Cost-shared demonstration activities will be conducted when appropriate.

Robert Youngblood

2011-01-01T23:59:59.000Z

257

PerMIS 2012 PERFORMANCE METRICS  

E-Print Network [OSTI]

, autonomous robots, the smart grid, and smart manufacturing systems. Given the importance of ensuring

258

Sandia National Laboratories: performance metric evaluation  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1developmentturbine bladelifetime ismobileparallel arc-fault Sandiaanalysis Sandia

259

Buildings Performance Metrics Terminology | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTie Ltd:June 2015 < prevBuilding the Distribution GridBuildings

260

EM Corporate Performance Metrics, Complex Level  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power SystemsResources DOE ZeroThreeEnergyDepartment0: DOE512: Alaska EM| DepartmentComplex

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

EM Corporate Performance Metrics, Site Level  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power SystemsResources DOE ZeroThreeEnergyDepartment0: DOE512: Alaska EM|

262

Quantifying the Improvements in Rapid Prototyping and Product Life Cycle Performance Created by Machining  

E-Print Network [OSTI]

use additional performance indicators (e.g. , consumption ofto calculate the key performance indicators (KP|s). This

2013-01-01T23:59:59.000Z

263

Contraction semigroups on metric graphs  

E-Print Network [OSTI]

The main objective of the present work is to study contraction semigroups generated by Laplace operators on metric graphs, which are not necessarily self-adjoint. We prove criteria for such semigroups to be continuity and positivity preserving. Also we provide a characterization of generators of Feller semigroups on metric graphs.

Vadim Kostrykin; Jurgen Potthoff; Robert Schrader

2008-02-26T23:59:59.000Z

264

August 2003 IT SECURITY METRICS  

E-Print Network [OSTI]

, efficiency, effectiveness, and the impact of the security controls. The process steps need not be sequen tial metrics program and provides examples of metrics based on the criti cal elements and security controls and techniques contained in NIST SP 800-26, Security Self-Assessment Guide for Information Technology Systems

265

Improving central heating plant performance at the defense construction supply center (DCSC): Advanced operation and maintenance methods. Final report  

SciTech Connect (OSTI)

A 1987 air pollution emissions test done by the U.S. Army Environmental Hygiene Agency (USAEHA) identified several problems with the central heating plant (CHP) at the Defense Construction Supply Center (DCSC), Columbus, OH. Though DCSC repaired the specified problems, improved coal specifications, and tried to reduce air infiltration, CHP performance remained at unacceptable levels. Consequently, DCSC contracted the U.S. Army Construction Engineering Research Laboratories (USACERL) to apply advanced operation and maintenance procedures to improve its combustion system. This study employed a system-wide approach to evaluate the CHP 5 fuel storage, combustion, heat distribution, and the control of air emissions. Many short-term improvements to the CHP were identified and tested. Subsequent combustion and air emissions tests revealed that the recommended improvements successfully increased CHP efficiency. Long-term improvements were also recommended to help maintain the short-term improvements.

Savoie, M.J.; Standerfer, J.; Schmidt, C.M.; Gostich, J.; Mignacca, J.

1994-11-01T23:59:59.000Z

266

Performance improvement of silicon nitride ball bearings by ion implantation. CRADA final report  

SciTech Connect (OSTI)

The present report summarizes technical results of CRADA No. ORNL 92-128 with the Pratt and Whitney Division of United Technologies Corporation. The stated purpose of the program was to assess the 3effect of ion implantation on the rolling contact performance of engineering silicon nitride bearings, to determine by post-test analyses of the bearings the reasons for improved or reduced performance and the mechanisms of failure, if applicable, and to relate the overall results to basic property changes including but not limited to swelling, hardness, modulus, micromechanical properties, and surface morphology. Forty-two control samples were tested to an intended runout period of 60 h. It was possible to supply only six balls for ion implantation, but an extended test period goal of 150 h was used. The balls were implanted with C-ions at 150 keV to a fluence of 1.1 {times} 10{sup 17}/cm{sup 2}. The collection of samples had pre-existing defects called C-cracks in the surfaces. As a result, seven of the control samples had severe spalls before reaching the goal of 60 h for an unacceptable failure rate of 0.003/sample-h. None of the ion-implanted samples experienced engineering failure in 150 h of testing. Analytical techniques have been used to characterize ion implantation results, to characterize wear tracks, and to characterize microstructure and impurity content. In possible relation to C-cracks. It is encouraging that ion implantation can mitigate the C-crack failure mode. However, the practical implications are compromised by the fact that bearings with C-cracks would, in no case, be acceptable in engineering practice, as this type of defect was not anticipated when the program was designed. The most important reason for the use of ceramic bearings is energy efficiency.

Williams, J.M. [Oak Ridge National Lab., TN (United States); Miner, J. [United Technologies Corp., West Palm Beach, FL (United States). Pratt and Whitney Div.

1998-03-01T23:59:59.000Z

267

Occurrence reporting and processing system (ORPS) lessons learned: Tools to improve workplace performance  

SciTech Connect (OSTI)

Various Department of Energy (DOE) orders require DOE and DOE contractor personnel to review abnormal events to gain lessons learned information. The term ``event`` is used to mean a real-time occurrence. When reviewing events data, it must be possible to determine what happened and why (including root causes), the impacts, the appropriate corrective actions, and any lessons learned that might be applicable to activities of other operations or contractors. Merely obtaining the information will not prevent occurrence of a similar event; contributing conditions must be corrected. It is important for managers, trainers, and others to learn from the events of others so that they may apply these experiences to their own activities. Reports of events must be analyzed to determine possible applicability to other facilities and/or job functions. Relevant information can then be used to correct defects and improve facilities and operations, thus making them more efficient and safer for all employees. Lessons learned information is particularly helpful in planning employee training and in developing training curriculum and programs. Lessons learned information can be obtained from many sources. It can be found in the Safety Performance Measurement System`s Computerized Accident/Incident Reporting System (CAIRS) module, the S&H Publications module, the Unusual Occurrence Reports module, and the Office of Nuclear Safety ``Operating Experience Weekly Summary.`` One important source of lessons teamed information is the Occurrence Reporting and Processing System (ORPS) database, which contains event data from September 1, 1990, to the present. This report discusses this source.

Commander, S.L.

1992-12-31T23:59:59.000Z

268

Occurrence reporting and processing system (ORPS) lessons learned: Tools to improve workplace performance  

SciTech Connect (OSTI)

Various Department of Energy (DOE) orders require DOE and DOE contractor personnel to review abnormal events to gain lessons learned information. The term event'' is used to mean a real-time occurrence. When reviewing events data, it must be possible to determine what happened and why (including root causes), the impacts, the appropriate corrective actions, and any lessons learned that might be applicable to activities of other operations or contractors. Merely obtaining the information will not prevent occurrence of a similar event; contributing conditions must be corrected. It is important for managers, trainers, and others to learn from the events of others so that they may apply these experiences to their own activities. Reports of events must be analyzed to determine possible applicability to other facilities and/or job functions. Relevant information can then be used to correct defects and improve facilities and operations, thus making them more efficient and safer for all employees. Lessons learned information is particularly helpful in planning employee training and in developing training curriculum and programs. Lessons learned information can be obtained from many sources. It can be found in the Safety Performance Measurement System's Computerized Accident/Incident Reporting System (CAIRS) module, the S H Publications module, the Unusual Occurrence Reports module, and the Office of Nuclear Safety Operating Experience Weekly Summary.'' One important source of lessons teamed information is the Occurrence Reporting and Processing System (ORPS) database, which contains event data from September 1, 1990, to the present. This report discusses this source.

Commander, S.L.

1992-01-01T23:59:59.000Z

269

Multi-strike ignition to improve performance, reduce misfiring of large gas engines  

SciTech Connect (OSTI)

New product and application information is now available on the advanced `CPU-2OOO` digital ignition system introduced by Altronic earlier this year for large-bore gas engines and integral compressors. The system is designed to improve performance, reduce misfiring, and be easily retrofitted to existing large-bore engines. including those that are being converted to lean-burn combustion in order to reduce emissions. To do this, the CPU-2OOO system features a selectable multi-striking mode, a selectable energy level and second spark plug cut-off control, a choice of global or individual cylinder timing control, and a high-energy long-duration spark. The 24 Vdc-powered system also offers comprehensive display and communications capabilities, plus system diagnostics and self-test functions. The system uses existing Altronic II-CPU coils, pickups, primary wiring harnesses and other hardware, allowing for easy upgrades of existing II-CPU installations. Also, a detonation avoidance system is being developed as an option for engine protection. Altronic says the field tests have demonstrated the ability of the CPU-20OO system to ignite extra-lean mixtures created when turbochargers are added to engines that previously operated at much richer levels. NO{sub x} emissions have been reduced by as much as 88%, to less than 2.7 g/kWh.

NONE

1995-10-01T23:59:59.000Z

270

Use of MWD for turbodrill performance optimization as a means to improve ROP  

SciTech Connect (OSTI)

Field tests were carried out to monitor the performance of turbodrills driving polycrystalline-diamond-compact (PDC) bits. Separate tests with mud-pulse measurement-while-drilling (MWD) tools involved measurement of the rotational speed of the bit and downhole torque. The results show that turbodrills are not always operated at the manufacturer's claimed maximum efficiency, resulting in disappointing rates of penetration (ROP's). On the basis of observed reduction in turbodrill runaway speed from the manufacturer's value, it is estimated that thrust-bearing friction can consume up to 50% of the net turbodrill power output. In an 8 l/2-in. (21.6-cm) hole, improvements in ROP of up to 100% could be obtained by use of the measured bit rotational speeds to monitor power output of the turbodrill. It was difficult to control bit rotational speed from the weight on bit (WOB), however, at the low average WOB's necessary for current PDC bit designs. It was apparent that the measurement of downhole torque has limited field application because no distinction can be made between true reactive torque at the bit and additional torque from the turbodrill's thrust bearings and stabilizers. The possible effect of flow-rate variations through the turbodrill during negative mud pulses was investigated with a flow loop. This proved to be insignificant.

deBruijn, H.J.; Kemp, A.J.; vanDongen, J.C.M.

1986-08-01T23:59:59.000Z

271

The use of MWD for turbodrill performance optimisation as a means to improve rate of penetration  

SciTech Connect (OSTI)

Field tests have been carried out to monitor the performance of turbodrills driving poly-crystalling diamond compact (PDC) bits. Separate tests, using mud pulse MWD tools, involved measuring the rotational speed of the bit and measuring downhole torque. The results show that turbodrills are not always operated at the manufacturer's claimed maximum efficiency, resulting in disappointing rates of penetration. Based on the observed reduction in turbodrill run-away speed from the manufacturer's value it is estimated that thrust bearing friction can consume up to 50% of the net turbodrill power output. In 8 1/2 inch hole improvements in rate of penetration of up to 100% could be obtained using the measured bit rotational speeds to monitor power output of the turbodrill. However, it was difficult to control bit rotational speed from the weight on bit at the low average weights on bit necessary for present PDC bit designs. It was apparent that measuring downhole torque has limited field application because no distinction can be made between true reactive torque at the bit and additional torque from the turbodrill's thrust bearings and stabilisers. The possible effect of flowrate variations through the turbodrill during negative mud pulses was investigated using a flowloop. This proved to be insignificant.

de Bruijn, H.J.; van Dongen, J.C.M.; Kemp, A.J.

1984-10-01T23:59:59.000Z

272

Advanced Aerodynamic Devices to Improve the Performance, Economics, Handling, and Safety of Heavy Vehicles  

SciTech Connect (OSTI)

Research is being conducted at the Georgia Tech Research Institute (GTRI) to develop advanced aerodynamic devices to improve the performance, economics, stability, handling and safety of operation of Heavy Vehicles by using previously-developed and flight-tested pneumatic (blown) aircraft technology. Recent wind-tunnel investigations of a generic Heavy Vehicle model with blowing slots on both the leading and trailing edges of the trailer have been conducted under contract to the DOE Office of Heavy Vehicle Technologies. These experimental results show overall aerodynamic drag reductions on the Pneumatic Heavy Vehicle of 50% using only 1 psig blowing pressure in the plenums, and over 80% drag reductions if additional blowing air were available. Additionally, an increase in drag force for braking was confirmed by blowing different slots. Lift coefficient was increased for rolling resistance reduction by blowing only the top slot, while downforce was produced for traction increase by blowing only the bottom. Also, side force and yawing moment were generated on either side of the vehicle, and directional stability was restored by blowing the appropriate side slot. These experimental results and the predicted full-scale payoffs are presented in this paper, as is a discussion of additional applications to conventional commercial autos, buses, motor homes, and Sport Utility Vehicles.

Robert J. Englar

2001-05-14T23:59:59.000Z

273

Analysis of Solar Cell Quality Using Voltage Metrics: Preprint  

SciTech Connect (OSTI)

The highest efficiency solar cells provide both excellent voltage and current. Of these, the open-circuit voltage (Voc) is more frequently viewed as an indicator of the material quality. However, since the Voc also depends on the band gap of the material, the difference between the band gap and the Voc is a better metric for comparing material quality of unlike materials. To take this one step further, since Voc also depends on the shape of the absorption edge, we propose to use the ultimate metric: the difference between the measured Voc and the Voc calculated from the external quantum efficiency using a detailed balance approach. This metric is less sensitive to changes in cell design and definition of band gap. The paper defines how to implement this metric and demonstrates how it can be useful in tracking improvements in Voc, especially as Voc approaches its theoretical maximum.

Toberer, E. S.; Tamboli, A. C.; Steiner, M.; Kurtz, S.

2012-06-01T23:59:59.000Z

274

Variable metric conjugate gradient methods  

SciTech Connect (OSTI)

1.1 Motivation. In this paper we present a framework that includes many well known iterative methods for the solution of nonsymmetric linear systems of equations, Ax = b. Section 2 begins with a brief review of the conjugate gradient method. Next, we describe a broader class of methods, known as projection methods, to which the conjugate gradient (CG) method and most conjugate gradient-like methods belong. The concept of a method having either a fixed or a variable metric is introduced. Methods that have a metric are referred to as either fixed or variable metric methods. Some relationships between projection methods and fixed (variable) metric methods are discussed. The main emphasis of the remainder of this paper is on variable metric methods. In Section 3 we show how the biconjugate gradient (BCG), and the quasi-minimal residual (QMR) methods fit into this framework as variable metric methods. By modifying the underlying Lanczos biorthogonalization process used in the implementation of BCG and QMR, we obtain other variable metric methods. These, we refer to as generalizations of BCG and QMR.

Barth, T.; Manteuffel, T.

1994-07-01T23:59:59.000Z

275

Enhancing performing characteristics of organic semiconducting films by improved solution processing  

DOE Patents [OSTI]

Improved processing methods for enhanced properties of conjugated polymer films are disclosed, as well as the enhanced conjugated polymer films produced thereby. Addition of low molecular weight alkyl-containing molecules to solutions used to form conjugated polymer films leads to improved photoconductivity and improvements in other electronic properties. The enhanced conjugated polymer films can be used in a variety of electronic devices, such as solar cells and photodiodes.

Bazan, Guillermo C; Moses, Daniel; Peet, Jeffrey; Heeger, Alan J

2014-05-13T23:59:59.000Z

276

Enhancing performance characteristics of organic semiconducting films by improved solution processing  

DOE Patents [OSTI]

Improved processing methods for enhanced properties of conjugated polymer films are disclosed, as well as the enhanced conjugated polymer films produced thereby. Addition of low molecular weight alkyl-containing molecules to solutions used to form conjugated polymer films leads to improved photoconductivity and improvements in other electronic properties. The enhanced conjugated polymer films can be used in a variety of electronic devices, such as solar cells and photodiodes.

Bazan, Guillermo C; Mikhailovsky, Alexander; Moses, Daniel; Nguyen, Thuc-Quyen; Peet, Jeffrey; Soci, Cesare

2012-11-27T23:59:59.000Z

277

Enhancing performance characteristics of organic semiconducting films by improved solution processing  

DOE Patents [OSTI]

Improved processing methods for enhanced properties of conjugated polymer films are disclosed, as well as the enhanced conjugated polymer films produced thereby. Addition of low molecular weight alkyl-containing molecules to solutions used to form conjugated polymer films leads to improved photoconductivity and improvements in other electronic properties. The enhanced conjugated polymer films can be used in a variety of electronic devices, such as solar cells and photodiodes.

Bazan, Guillermo C. (Santa Barbara, CA); Heeger, Alan J. (Santa Barbara, CA); Moses, Daniel (Santa Barbara, CA); Peet, Jeffrey (Goleta, CA)

2013-09-25T23:59:59.000Z

278

Support vector machines improve the accuracy of evaluation for the performance of laparoscopic training tasks  

E-Print Network [OSTI]

009-0556-6 Support vector machines improve the accuracy ofand support vector machine [SVM]) were compared. Theevaluation Á Support vector machines Á Training B. Allen (&)

Allen, Brian; Nistor, Vasile; Dutson, Erik; Carman, Greg; Lewis, Catherine; Faloutsos, Petros

2010-01-01T23:59:59.000Z

279

Vehicle Technologies Office Merit Review 2014: Improving Fatigue Performance of AHSS Welds  

Broader source: Energy.gov [DOE]

Presentation given by Oak Ridge National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about improving...

280

Variable buoyancy system metric  

E-Print Network [OSTI]

Over the past 20 years, underwater vehicle technology has undergone drastic improvements, and vehicles are quickly gaining popularity as a tool for numerous oceanographic tasks. Systems used on the vehicle to alter buoyancy, ...

Jensen, Harold Franklin

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

A new control strategy to improve the performance of PWM ac to dc converter under unbalanced operating condition  

E-Print Network [OSTI]

, this improved performance of the converter is not necessarily achieved. Unbalanced voltage inputs introduce a significant amount of unwanted harmonics in the input current and output voltage of the converter. These unwanted harmonics result in increased... and to develop some techniques to preserve their high performance features. This thesis. therefore. presents a new control strategy which selectively cancels the generated abnormal harmonics from the input and output waveforms without the addition of any...

Choudhury, Shamim A.

1992-01-01T23:59:59.000Z

282

Segmental alternations and metrical theory  

E-Print Network [OSTI]

This dissertation focuses on phonological alternations that are influenced or constrained by word-internal prosody, i.e. prominence and foot structure, and what these alternations can tell us about metrical theory. Detailed ...

Vaysman, Olga

2009-01-01T23:59:59.000Z

283

A relevance of documentation metric  

E-Print Network [OSTI]

A RELEVANCE OF DOCUMENTATION METRIC A Thesis by JUSTIN WILLIAM PATTERSON Submitted to the Oflice of Graduate Studies of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1996 Major... Subject: Computer Science A RELEVANCE OF DOCUMENTATION METRIC A Thesis by JUSTIN WILLIAM PATTERSON Submitted to Texas AkM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style and content by...

Patterson, Justin William

1996-01-01T23:59:59.000Z

284

Improvement of Power-Performance Efficiency for High-End Computing Rong Ge, Xizhou Feng, Kirk W. Cameron  

E-Print Network [OSTI]

. Earth Simulator requires 18 megawatts of power. Petaflop systems may require 100 megawatts of power[2], nearly the output of a small power plant (300 megawatts). At $100 per megawatt ($.10 per kilowatt), peakImprovement of Power-Performance Efficiency for High-End Computing Rong Ge, Xizhou Feng, Kirk W

Freeh, Vincent

285

PRL_2nd_revise_3 -WWW--07/06/021 Improving the performance of radial basis function classifiers in  

E-Print Network [OSTI]

PRL_2nd_revise_3 - WWW--07/06/021 Improving the performance of radial basis function classifiers, 23: 569-577. 1 To whom correspondence should be addressed. #12;PRL_2nd_revise_3 - WWW--07/06/022 1 and other application areas, methods for identifying the optimal threshold values are required. #12;PRL_2nd

Pont, Michael J.

286

Improving Grid Performance with Electric Vehicle Charging 2011San Diego Gas & Electric Company. All copyright and trademark rights reserved.  

E-Print Network [OSTI]

Improving Grid Performance with Electric Vehicle Charging © 2011San Diego Gas & Electric Company · Education SDG&E Goal ­ Grid Integrated Charging · More plug-in electric vehicles · More electric grid to a hairdryer) per PEV in the population · Instantaneous demand, 40 all-electric vehicles for one day (8

California at Davis, University of

287

Improvement of pin-type amorphous silicon solar cell performance by employing double silicon-carbide p-layer structure  

E-Print Network [OSTI]

Improvement of pin-type amorphous silicon solar cell performance by employing double silicon-carbide Received 30 October 2003; accepted 18 November 2003 We investigated a double silicon-carbide p-layer structure consisting of a undiluted p-type amorphous silicon-carbide (p-a-SiC:H) window layer and a hydrogen

Kim, Yong Jung

288

Improving Alfalfa Forage Performance, or "Why Not Just Use Vernal?" Kim Cassida, Joe Paling, and Christian Kapp  

E-Print Network [OSTI]

Improving Alfalfa Forage Performance, or "Why Not Just Use Vernal?" Kim Cassida, Joe Paling to the conventional alfalfa test, we have added tests for Roundup Ready alfalfa in East Lansing, Lake City at MSU, I have repeatedly heard the comment that the old standby Vernal alfalfa outlasts and outperforms

289

1920 IEEE TRANSACTIONS ON MAGNETICS, VOL. 40, NO. 4, JULY 2004 Improving the Starting Performance of Large  

E-Print Network [OSTI]

1920 IEEE TRANSACTIONS ON MAGNETICS, VOL. 40, NO. 4, JULY 2004 Improving the Starting Performance of Large Salient-Pole Synchronous Machines Haran Karmaker, Senior Member, IEEE, and Chunting Mi, Senior of the starting system of the salient-pole synchronous machines in a pumping-generating plant. We focused

Mi, Chunting "Chris"

290

Improving the lifetime performance of ceramic fuel cells Fuel cells generate electricity from fuels more efficiently and with  

E-Print Network [OSTI]

to the development of low-cost, modular and fuel-flexible solid oxide fuel cell technology. #12;2014 Improving the lifetime performance of ceramic fuel cells Fuel cells generate electricity from fuels more efficiently and with fewer emissions per watt than burning fossil fuels. But as fuel cells

Rollins, Andrew M.

291

ENVIRONMENTAL POLICY STATEMENT 1 The University of Aberdeen is committed to constant improvement of its environmental performance as  

E-Print Network [OSTI]

ENVIRONMENTAL POLICY STATEMENT 1 The University of Aberdeen is committed to constant improvement will introduce a series of specific policies, aimed at tackling these key environmental issues. Those policies of its environmental performance as part of its wider commitment to sustainability and social

Levi, Ran

292

DAYLIGHTING METRICS FOR RESIDENTIAL BUILDINGS  

E-Print Network [OSTI]

It is now widely accepted that the standard method for daylighting evaluation- the daylight factor- is due for replacement with metrics founded on absolute values for luminous quantities predicted over the course of a full year using sun and sky conditions derived from standardised climate files. The move to more realistic measures of daylighting introduces significant levels of additional complexity in both the simulation of the luminous quantities and the reduction of the simulation data to readily intelligible metrics. The simulation component, at least for buildings with standard glazing materials, is reasonably well understood. There is no consensus however on the composition of the metrics, and their formulation is an ongoing area of active research. Additionally, non-domestic and residential buildings present very different evaluation scenarios and it is not yet clear if a single metric would be applicable to both. This study uses a domestic dwelling as the setting to investigate and explore the applicability of daylighting metrics for residential buildings. In addition to daylighting provision for task and disclosing the potential for reducing electric lighting usage, we also investigate the formulation of metrics for non-visual effects such as entrainment of the circadian system.

unknown authors

293

Enhanced Accident Tolerant LWR Fuels National Metrics Workshop Report  

SciTech Connect (OSTI)

The U.S. Department of Energy Office of Nuclear Energy (DOE-NE), in collaboration with the nuclear industry, has been conducting research and development (R&D) activities on advanced Light Water Reactor (LWR) fuels for the last few years. The emphasis for these activities was on improving the fuel performance in terms of increased burnup for waste minimization and increased power density for power upgrades, as well as collaborating with industry on fuel reliability. After the events at the Fukushima Nuclear Power Plant in Japan in March 2011, enhancing the accident tolerance of LWRs became a topic of serious discussion. In the Consolidated Appropriations Act, 2012, Conference Report 112-75, the U.S. Congress directed DOE-NE to: • Give “priority to developing enhanced fuels and cladding for light water reactors to improve safety in the event of accidents in the reactor or spent fuel pools.” • Give “special technical emphasis and funding priority…to activities aimed at the development and near-term qualification of meltdown-resistant, accident-tolerant nuclear fuels that would enhance the safety of present and future generations of light water reactors.” • Report “to the Committee, within 90 days of enactment of this act, on its plan for development of meltdown-resistant fuels leading to reactor testing and utilization by 2020.” Fuels with enhanced accident tolerance are those that, in comparison with the standard UO2-zirconium alloy system currently used by the nuclear industry, can tolerate loss of active cooling in the reactor core for a considerably longer time period (depending on the LWR system and accident scenario) while maintaining or improving the fuel performance during normal operations, and operational transients, as well as design-basis and beyond design-basis events. The overall draft strategy for development and demonstration is comprised of three phases: Feasibility Assessment and Down-selection; Development and Qualification; and Commercialization. The activities performed during the feasibility assessment phase include laboratory scale experiments; fuel performance code updates; and analytical assessment of economic, operational, safety, fuel cycle, and environmental impacts of the new concepts. The development and qualification stage will consist of fuel fabrication and large scale irradiation and safety basis testing, leading to qualification and ultimate NRC licensing of the new fuel. The commercialization phase initiates technology transfer to industry for implementation. Attributes for fuels with enhanced accident tolerance include improved reaction kinetics with steam and slower hydrogen generation rate, while maintaining acceptable cladding thermo-mechanical properties; fuel thermo-mechanical properties; fuel-clad interactions; and fission-product behavior. These attributes provide a qualitative guidance for parameters that must be considered in the development of fuels and cladding with enhanced accident tolerance. However, quantitative metrics must be developed for these attributes. To initiate the quantitative metrics development, a Light Water Reactor Enhanced Accident Tolerant Fuels Metrics Development Workshop was held October 10-11, 2012, in Germantown, Maryland. This document summarizes the structure and outcome of the two-day workshop. Questions regarding the content can be directed to Lori Braase, 208-526-7763, lori.braase@inl.gov.

Lori Braase

2013-01-01T23:59:59.000Z

294

Labs21: Improving the Environmental Performance of U.S. Laboratories  

E-Print Network [OSTI]

. The purpose of our presentation is to outline the components of the Labs21 program, discuss the environmental and economic benefits for participants, and identify the various ways organizations can become involved. Labs21 currently focuses on improving...

Mathew, P.

295

Improving supply chain performance by implementing weekly demand planning processes in the consumer packaged goods industry  

E-Print Network [OSTI]

This thesis examines how simple weekly demand planning process can improve inventory levels and customers service levels at the Gillette Company. The processes designed by the project team has been tested and executed in ...

Rah, Myung-Hyun Elisa

2006-01-01T23:59:59.000Z

296

Performance and design improvements toward the commercialization of a needle-free jet injector/  

E-Print Network [OSTI]

In the past years, the BioInstrumentation Lab has developed a handheld needle-free jet injector based on a custom Lorentz-force motor. While the current handheld design is effective as a research tool, many improvements ...

Modak, Ashin (Ashin Pramod)

2013-01-01T23:59:59.000Z

297

Improving the Performance of a Two-Shell Column with Advanced Control  

E-Print Network [OSTI]

acetylene content as well as total C]'s. A deadtime compensated PID algorithm sets the target for the reboiler steam flow controller to maintain the target concentration. The steam flow is also adjusted by moves from a feedforward controller... content increased. This also allows the rectifier to run cooler. RESULTS The advanced computer control strategies have improved product quality, increased column capacity and improved energy efficiency. The composition controls maintain operations...

Morrison, T. A.; Laflamme, D.

298

Methodology, Methods, and Metrics for Testing and Evaluating Augmented Cognition Systems  

SciTech Connect (OSTI)

The augmented cognition research community seeks cognitive neuroscience-based solutions to improve warfighter performance by applying and managing mitigation strategies to reduce workload and improve the throughput and quality of decisions. The focus of augmented cognition mitigation research is to define, demonstrate, and exploit neuroscience and behavioral measures that support inferences about the warfighter’s cognitive state that prescribe the nature and timing of mitigation. A research challenge is to develop valid evaluation methodologies, metrics and measures to assess the impact of augmented cognition mitigations. Two considerations are external validity, which is the extent to which the results apply to operational contexts; and internal validity, which reflects the reliability of performance measures and the conclusions based on analysis of results. The scientific rigor of the research methodology employed in conducting empirical investigations largely affects the validity of the findings. External validity requirements also compel us to demonstrate operational significance of mitigations. Thus it is important to demonstrate effectiveness of mitigations under specific conditions. This chapter reviews some cognitive science and methodological considerations in designing augmented cognition research studies and associated human performance metrics and analysis methods to assess the impact of augmented cognition mitigations.

Greitzer, Frank L.

2008-09-15T23:59:59.000Z

299

Metrics for Evaluating the Accuracy of Solar Power Forecasting: Preprint  

SciTech Connect (OSTI)

Forecasting solar energy generation is a challenging task due to the variety of solar power systems and weather regimes encountered. Forecast inaccuracies can result in substantial economic losses and power system reliability issues. This paper presents a suite of generally applicable and value-based metrics for solar forecasting for a comprehensive set of scenarios (i.e., different time horizons, geographic locations, applications, etc.). In addition, a comprehensive framework is developed to analyze the sensitivity of the proposed metrics to three types of solar forecasting improvements using a design of experiments methodology, in conjunction with response surface and sensitivity analysis methods. The results show that the developed metrics can efficiently evaluate the quality of solar forecasts, and assess the economic and reliability impact of improved solar forecasting.

Zhang, J.; Hodge, B. M.; Florita, A.; Lu, S.; Hamann, H. F.; Banunarayanan, V.

2013-10-01T23:59:59.000Z

300

Metrics On Unitary Matrices And Their Application To Quantifying The Degree Of Non-Commutativity Between Unitary Matrices  

E-Print Network [OSTI]

By studying the minimum resources required to perform a unitary transformation, families of metrics and pseudo-metrics on unitary matrices that are closely related to a recently reported quantum speed limit by the author are found. Interestingly, this family of metrics can be naturally converted into useful indicators of the degree of non-commutativity between two unitary matrices.

H. F. Chau

2011-07-06T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

PERFORMANCE OBJECTIVES FOR TANK FARM CLOSURE PERFORMANCE ASSESSMENTS  

SciTech Connect (OSTI)

This report documents the performance objectives (metrics, times of analyses, and times of compliance) to be used in performance assessments of Hanford Site tank farm closure.

MANN, F.M.; CRUMPLER, J.D.

2005-09-30T23:59:59.000Z

302

Locating Performance Improvement Opportunities in an Industrial Software-as-a-Service Application  

E-Print Network [OSTI]

- gories of maintenance are defined: corrective, adaptive, per- fective and preventive maintenance.van.de.graaf, maarten.wiertz, remko.weijers}@exact.com Abstract--The goal of performance maintenance is to im- prove is useful for speeding up the performance maintenance process and that heat maps are a valuable way

Zaidman, Andy

303

Heating, Ventilating, and Air-Conditioning: Recent Advances in Diagnostics and Controls to Improve Air-Handling System Performance  

SciTech Connect (OSTI)

The performance of air-handling systems in buildings needs to be improved. Many of the deficiencies result from myths and lore and a lack of understanding about the non-linear physical principles embedded in the associated technologies. By incorporating these principles, a few important efforts related to diagnostics and controls have already begun to solve some of the problems. This paper illustrates three novel solutions: one rapidly assesses duct leakage, the second configures ad hoc duct-static-pressure reset strategies, and the third identifies useful intermittent ventilation strategies. By highlighting these efforts, this paper seeks to stimulate new research and technology developments that could further improve air-handling systems.

Wray, Craig; Wray, Craig P.; Sherman, Max H.; Walker, I.S.; Dickerhoff, D.J.; Federspiel, C.C.

2008-02-01T23:59:59.000Z

304

Why Metrics Matter: Evaluating Policy Choices for Reactive Nitrogen  

E-Print Network [OSTI]

for reducing Nr releases into the air are also lower. These findings have major implications for the use and support improved coordination between the Clean Air and Clean Water Acts while restoring the Chesapeake for the interest in metrics related to pollutants is the role they play now and in future regulation. Current

Tufts University

305

MODELS AND METRICS FOR ENERGY-EFFICIENT COMPUTER SYSTEMS  

E-Print Network [OSTI]

MODELS AND METRICS FOR ENERGY-EFFICIENT COMPUTER SYSTEMS A DISSERTATION SUBMITTED TO THE DEPARTMENT promising energy-efficient technolo- gies, and models to understand the effects of resource utilization decisions on power con- sumption. To facilitate energy-efficiency improvements, this dissertation presents

Kozyrakis, Christos

306

Improving TCP Performance over Networks with Wireless Components using ``Probing Devices''  

E-Print Network [OSTI]

, but the actual ``sending window'' never exceeds the minimum of the advertised and congestion window. Standard TCP­Tahoe and TCP­Reno. We show that, this way, standard TCP can improve its per­ formance without requiring any the design limitations of the probing device itself. The aggressive or conservative nature of the probing

Tsaoussidis, Vassilis

307

Methods to Improve Process Safety Performance through Flange Connection Leak Prediction and Control  

E-Print Network [OSTI]

of their parent asset. This thesis focuses on methods to improve prediction and control of corrosion and leakage at flange connections in particular. Flange connection seal tightness can be monitored through vibration-based Non-Destruction Testing (NDT). The data...

Nelson, Jeremy

2014-08-08T23:59:59.000Z

308

Using Code Perforation to Improve Performance, Reduce Energy Consumption, and Respond to Failures  

E-Print Network [OSTI]

Many modern computations (such as video and audio encoders, Monte Carlo simulations, and machine learning algorithms) are designed to trade off accuracy in return for increased performance. To date, such computations ...

Agarwal, Anant

2009-09-03T23:59:59.000Z

309

Improving the Performance of Air-Conditioning Systems in an ASEAN Climate  

E-Print Network [OSTI]

This paper describes an analysis of air conditioning performance under hot and humid tropical climate conditions appropriate to the Association of South East Asian Nations (ASEAN) countries. This region, with over 280 million people, has one...

Busch, J. F.; Warren, M. L.

1988-01-01T23:59:59.000Z

310

Improving environmental performances of organic spreading technologies through the use of life cycle  

E-Print Network [OSTI]

spreading machines. Key words: Spreading technology, environmental performances, LCA, sewage sludge land application linked with the type of effluent, very few studies take the technology used of sewage sludge spreading scenarios involving different types of spreaders in different pedoclimatic

Boyer, Edmond

311

Improved Student Performance In Electricity And Magnetism Following Prior MAPS Instruction In Mechanics  

E-Print Network [OSTI]

We examine the performance of a group of students in Introductory Electricity and Magnetism following a ReView course in Introductory Mechanics focusing on problem solving employing the Modeling Applied to Problem Solving ...

Rayyan, Saif

312

Conceptual Soundness, Metric Development, Benchmarking, and Targeting for PATH Subprogram Evaluation  

SciTech Connect (OSTI)

The objective of this study is to evaluate the conceptual soundness of the U.S. Department of Housing and Urban Development (HUD) Partnership for Advancing Technology in Housing (PATH) program's revised goals and establish and apply a framework to identify and recommend metrics that are the most useful for measuring PATH's progress. This report provides an evaluative review of PATH's revised goals, outlines a structured method for identifying and selecting metrics, proposes metrics and benchmarks for a sampling of individual PATH programs, and discusses other metrics that potentially could be developed that may add value to the evaluation process. The framework and individual program metrics can be used for ongoing management improvement efforts and to inform broader program-level metrics for government reporting requirements.

Mosey. G.; Doris, E.; Coggeshall, C.; Antes, M.; Ruch, J.; Mortensen, J.

2009-01-01T23:59:59.000Z

313

Method of improving fuel cell performance by removing at least one metal oxide contaminant from a fuel cell electrode  

DOE Patents [OSTI]

A method of removing contaminants from a fuel cell catalyst electrode. The method includes providing a getter electrode and a fuel cell catalyst electrode having at least one contaminant to a bath and applying a voltage sufficient to drive the contaminant from the fuel cell catalyst electrode to the getter electrode. Methods of removing contaminants from a membrane electrode assembly of a fuel cell and of improving performance of a fuel cell are also provided.

Kim, Yu Seung (Los Alamos, NM); Choi, Jong-Ho (Los Alamos, NM); Zelenay, Piotr (Los Alamos, NM)

2009-08-18T23:59:59.000Z

314

Decision-Making Aid Tool for the Evaluation and Improvement of the Energy Performance of Stock of Buildings  

E-Print Network [OSTI]

the most adapted one to develop each functionality of the decision- making aid tool for the evaluation and improvement of the energy performance of stock of buildings. Existing methods The Table 1 [1] & [4] shows a brief comparison between... buildings and distribute whole consumptions on end uses. Figure 3 shows the process used to validate the Benchmarking method. Simulations will be carried out with the SIMBAD Toolbox according to the stock data to evaluate energy consumptions...

Joutey, H. A.; Vaezi-Nejad, H.; Lahrech, R.

2005-01-01T23:59:59.000Z

315

Horizon thermodynamics and composite metrics  

E-Print Network [OSTI]

We examine the conditions under which the thermodynamic behaviour of gravity can be explained within an emergent gravity scenario, where the metric is defined as a composite operator. We show that due to the availability of a boundary of a boundary principle for the quantum effective action, Clausius-like relations can always be constructed. Hence, any true explanation of the thermodynamic nature of the metric tensor has to be referred to an equilibration process, associated to the presence of an H-theorem, possibly driven by decoherence induced by the pregeometric degrees of freedom, and their entanglement with the geometric ones.

Lorenzo Sindoni

2012-11-12T23:59:59.000Z

316

High Temperature Steam Electrolysis: Demonstration of Improved Long-Term Performance  

SciTech Connect (OSTI)

Long-term performance is an ongoing issue for hydrogen production based on high-temperature steam electrolysis (HTSE). For commercial deployment, solid-oxide electrolysis stacks must achieve high performance with long-term degradation rates of {approx}0.5%/1000 hours or lower. Significant progress has been achieved toward this goal over the past few years. This paper will provide details of progress achieved under the Idaho National Laboratory high temperature electrolysis research program. Recent long-term stack tests have achieved high initial performance with degradation rates less than 5%/khr. These tests utilize internally manifolded stacks with electrode-supported cells. The cell material sets are optimized for the electrolysis mode of operation. Details of the cells and stacks will be provided along with details of the test apparatus, procedures, and results.

J. E. O'Brien; X. Zhang; R. C. O'Brien; G. Tao

2011-11-01T23:59:59.000Z

317

Primer Control System Cyber Security Framework and Technical Metrics  

SciTech Connect (OSTI)

The Department of Homeland Security National Cyber Security Division supported development of a control system cyber security framework and a set of technical metrics to aid owner-operators in tracking control systems security. The framework defines seven relevant cyber security dimensions and provides the foundation for thinking about control system security. Based on the developed security framework, a set of ten technical metrics are recommended that allow control systems owner-operators to track improvements or degradations in their individual control systems security posture.

Wayne F. Boyer; Miles A. McQueen

2008-05-01T23:59:59.000Z

318

Integration of the EM Corporate QA Performance Metrics With Performance  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"ClickPipelinesProvedDecemberInitiatives Initiatives Through a variety oftheLaboratory |

319

Daylighting in schools: Improving student performance and health at a price schools can afford: Preprint  

SciTech Connect (OSTI)

Over the next seven years, at least 5,000 new schools will be designed and constructed to meet the needs of American students in kindergarten through grade 12. National efforts are underway to encourage the use of daylighting, energy efficiency, and renewable energy technologies in school designs, which can significantly enhance the learning environment. Recent rigorous statistical studies, involving 21,000 students in three states, reveal that students perform better in daylit classrooms and indicate the health benefits of daylighting. This paper discusses the evidence regarding daylighting and student performance and development, and presents four case studies of schools that have cost effectively implemented daylighting into their buildings.

Plympton, P.; Conway, S.; Epstein, K.

2000-06-14T23:59:59.000Z

320

Improved Performance of an Air Cooled Condenser (ACC) Using SPX Wind Guide Technology at Coal-Based Thermoelectric Power Plants  

SciTech Connect (OSTI)

This project added a new airflow enhancement technology to an existing ACC cooling process at a selected coal power plant. Airflow parameters and efficiency improvement for the main plant cooling process using the applied technology were determined and compared with the capabilities of existing systems. The project required significant planning and pre-test execution in order to reach the required Air Cooled Condenser system configuration for evaluation. A host Power Plant ACC system had to be identified, agreement finalized, and addition of the SPX ACC Wind Guide Technology completed on that site. Design of the modification, along with procurement, fabrication, instrumentation, and installation of the new airflow enhancement technology were executed. Baseline and post-modification cooling system data was collected and evaluated. The improvement of ACC thermal performance after SPX wind guide installation was clear. Testing of the improvement indicates there is a 5% improvement in heat transfer coefficient in high wind conditions and 1% improvement at low wind speed. The benefit increased with increasing wind speed. This project was completed on schedule and within budget.

Ken Mortensen

2010-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Nanoparticle-induced light scattering for improved performance of quantum-well solar cells  

E-Print Network [OSTI]

performance of InP/InGaAsP quantum-well waveguide solar cells via light scattering from deposited dielectric of quantum wells to ensure high photon absorption efficiency and increased short-circuit current den- sity homojunction device by extending the absorption spectrum to longer wavelengths.6,7 We show here that nor- mally

Yu, Edward T.

322

On improving performance and conserving power in cluster-based web servers  

E-Print Network [OSTI]

forward client requests to a balanced set of waiting servers in complete transparency to the clients. The policy employed in forwarding requests from the front-end distributor to the backend servers plays an important role in the overall system performance...

Vageesan, Gopinath

2007-04-25T23:59:59.000Z

323

Advanced Energy Retrofit Guide: Practical Ways to Improve Energy Performance; Grocery Stores (Revised) (Book)  

SciTech Connect (OSTI)

The U.S. Department of Energy developed the Advanced Energy Retrofit Guides (AERGs) to provide specific methodologies, information, and guidance to help energy managers and other stakeholders successfully plan and execute energy efficiency improvements. Detailed technical discussion is fairly limited in these guides. Instead, we emphasize actionable information, practical methodologies, diverse case studies, and unbiased evaluations of the most promising retrofit measures for each building type. A series of AERGs is under development, addressing key segments of the commercial building stock. Grocery stores were selected as one of the highest priority sectors, because they represent one of the most energy-intensive market segments.

Hendron, B.

2013-07-01T23:59:59.000Z

324

Advanced Energy Retrofit Guide: Practical Ways to Improve Energy Performance, K-12 Schools (Book)  

SciTech Connect (OSTI)

The U.S. Department of Energy developed the K-12 Advanced Energy Retrofit Guide to provide specific methodologies, information, and guidance to help energy managers and other stakeholders plan and execute energy efficiency improvements. We emphasize actionable information, practical methodologies, diverse case studies, and unbiased evaluation of the most promising retrofit measure for each building type. K-12 schools were selected as one of the highest priority building sectors, because schools affect the lives of most Americans. They also represent approximately 8% of the energy use and 10% of the floor area in commercial buildings.

Not Available

2013-02-01T23:59:59.000Z

325

Why is the metric invertible?  

E-Print Network [OSTI]

We raise, and provide an (unsatisfactory) answer to, the title's question: why, unlike all other fields, does the gravitational "metric" variable not have zero vacuum? After formulating, without begging it, we exhibit additions to the conventional action that express existence of the inverse through a field equation.

S. Deser

2006-03-30T23:59:59.000Z

326

Lorentzian Metrics from Characteristic Surfaces  

E-Print Network [OSTI]

The following issue is raised and discussed; when do families of foliations by hypersurfaces on a given four dimensional manifold become the null surfaces of some unknown, but to be determined, metric $g_{ab}(x)$? It follows from these results that one can use these surfaces as fundamental variables for GR.

Simonetta Frittelli; Carlos Kozameh; Ted Newman

1995-02-11T23:59:59.000Z

327

Corporate Energy Management Strategies for GHG Reduction and Improved Business Performance  

E-Print Network [OSTI]

center via an internet secure VPN. Second, Constraint Reporting and Lost Opportunity Reporting System The EMRS has a unique ability to identify and quan- tify process and control system constraints that pre- vent the system from performing better 12.... ? Tools available to optimize returns and as- sure sustainable results. BACKGROUND Over the last several decades, manufacturing proc- esses and power plants have been significantly changed by the evolution of process control system technologies. Each...

Robinson, J. E.

328

Improved characterization of reservoir behavior by integration of reservoir performances data and rock type distributions  

SciTech Connect (OSTI)

An integrated geological/petrophysical and reservoir engineering study was performed for a large, mature waterflood project (>250 wells, {approximately}80% water cut) at the North Robertson (Clear Fork) Unit, Gaines County, Texas. The primary goal of the study was to develop an integrated reservoir description for {open_quotes}targeted{close_quotes} (economic) 10-acre (4-hectare) infill drilling and future recovery operations in a low permeability, carbonate (dolomite) reservoir. Integration of the results from geological/petrophysical studies and reservoir performance analyses provide a rapid and effective method for developing a comprehensive reservoir description. This reservoir description can be used for reservoir flow simulation, performance prediction, infill targeting, waterflood management, and for optimizing well developments (patterns, completions, and stimulations). The following analyses were performed as part of this study: (1) Geological/petrophysical analyses: (core and well log data) - {open_quotes}Rock typing{close_quotes} based on qualitative and quantitative visualization of pore-scale features. Reservoir layering based on {open_quotes}rock typing {close_quotes} and hydraulic flow units. Development of a {open_quotes}core-log{close_quotes} model to estimate permeability using porosity and other properties derived from well logs. The core-log model is based on {open_quotes}rock types.{close_quotes} (2) Engineering analyses: (production and injection history, well tests) Material balance decline type curve analyses to estimate total reservoir volume, formation flow characteristics (flow capacity, skin factor, and fracture half-length), and indications of well/boundary interference. Estimated ultimate recovery analyses to yield movable oil (or injectable water) volumes, as well as indications of well and boundary interference.

Davies, D.K.; Vessell, R.K. [David K. Davies & Associates, Kingwood, TX (United States); Doublet, L.E. [Texas A& M Univ., College Station, TX (United States)] [and others

1997-08-01T23:59:59.000Z

329

Rather than resonance, flapping wing flyers may play on aerodynamics to improve performance  

E-Print Network [OSTI]

Saving energy and enhancing performance are secular preoccupations shared by both nature and human beings. In animal locomotion, flapping flyers or swimmers rely on the flexibility of their wings or body to passively increase their efficiency using an appropriate cycle of storing and releasing elastic energy. Despite the convergence of many observations pointing out this feature, the underlying mechanisms explaining how the elastic nature of the wings is related to propulsive efficiency remain unclear. Here we use an experiment with a self-propelled simplified insect model allowing to show how wing compliance governs the performance of flapping flyers. Reducing the description of the flapping wing to a forced oscillator model, we pinpoint different nonlinear effects that can account for the observed behavior ---in particular a set of cubic nonlinearities coming from the clamped-free beam equation used to model the wing and a quadratic damping term representing the fluid drag associated to the fast flapping motion. In contrast to what has been repeatedly suggested in the literature, we show that flapping flyers optimize their performance not by especially looking for resonance to achieve larger flapping amplitudes with less effort, but by tuning the temporal evolution of the wing shape (i.e. the phase dynamics in the oscillator model) to optimize the aerodynamics.

Sophie Ramananarivo; Ramiro Godoy-Diana; Benjamin Thiria

2011-08-29T23:59:59.000Z

330

Joint optimization of location and inventory decisions for improving supply chain cost performance  

E-Print Network [OSTI]

521 12.3% 1986 4.46 217 281 20 518 11.6% 1987 4.74 225 294 21 540 11.4% 1988 5.10 251 313 23 587 11.5% 1989 5.48 282 329 24 635 11.6% 1990 5.80 283 351 25 659 11.4% 1991 6.00 256 355 24 635 10.6% 1992 6.34 237 375 24 636 10.0% 1993 6.66 239 396 25 660....5% 2002 10.49 301 582 35 918 8.8% 2003 11.00 301 607 36 944 8.6% 2004 11.74 332 644 39 1015 8.6% 4 each other into a managerially coordinated initiative to emphasize market im- pact, overall efficiency, continuous improvement, and overall competitiveness...

Keskin, Burcu Baris

2009-05-15T23:59:59.000Z

331

Incremental performance improvements for a surface-convergency H- ion source  

SciTech Connect (OSTI)

We discuss some of the interventions on LANSCE's surface-conversion negative-hydrogen ion sources to increase reliability; lifetime and output without any major re-design of the machine. LANSCE's source presently delivers a baseline 16 mA, 60 Hz, 12% duty factor beam. We describe how better quality control and processing of tungsten filaments allow the comfortable completion of 28-day run cycles, how improved temperature control of the ion source body yields an increased H{sup -} output, how higher input power through an additional filament allows operations at plasma densities while maintaining the filament lifetime and how adequate electrode biasing inside the source provide some control over the beam Twiss parameters on exit.

Rouleau, Gary [Los Alamos National Laboratory; Chacon - Golcher, Edwin [Los Alamos National Laboratory; Geros, Ernest [Los Alamos National Laboratory; Johnson, Kenneth [Los Alamos National Laboratory; Rybarcyk, Lawrence [Los Alamos National Laboratory; Stelzer, James [Los Alamos National Laboratory; Keller, Roderich [NON LANL; Tarvainen, Olli [NON LANL

2010-11-10T23:59:59.000Z

332

METRIC CHARACTERIZATIONS OF SPHERICAL AND EUCLIDEAN BUILDINGS  

E-Print Network [OSTI]

BUILDINGS Ruth Charney and Alexander Lytchak 0 of spaces satisfying CAT-inequalities are spherical and Euclidean buildings which come equipped with a natural piecewise spherical or Euclidean metric. Buildings also satisfy other nice metric properties

Charney, Ruth

333

Predicting Classes in Need of Refactoring: An Application of Static Metrics Liming Zhao Jane Huffman Hayes  

E-Print Network [OSTI]

. In general, the following process is followed by a software team performing refactoring: Identify code1 Predicting Classes in Need of Refactoring: An Application of Static Metrics Liming Zhao Jane to predicting refactoring candidates. Using a selected set of static metrics and a weighted ranking method

Hayes, Jane E.

334

Modular condenser replacement at ANO-1 solves operating problems and improves performance  

SciTech Connect (OSTI)

After 22 years of operation, the condenser tube bundles and waterboxes at Arkansas Nuclear One, Unit 1 (ANO-1) had deteriorated significantly, impairing operating performance, reducing condenser reliability and increasing maintenance cost. An extensive condition assessment performed in 1995 revealed a 34% wall loss on the original Admiralty tubing and an erosion rate of 1.7% annually. Additionally, Arkansas Nuclear One was considering an 8% power uprate, which would place additional duty on the main condenser. As a result, it was decided to completely reconstruct the four condenser tube bundles serving the two low-pressure turbines at Arkansas Nuclear One. An evaluation of the available condenser tube materials was performed to determine which material was best suited for service in the single pass, single pressure condenser at ANO-1. All copper based materials were excluded from consideration due to the detrimental effect copper has on secondary chemistry and more specifically steam generator integrity. Titanium and a variety of stainless steel materials were evaluated, and ultimately titanium was selected as the replacement condenser tube material for the rebuilt condenser tube bundles due primarily to its corrosion resistance and extensive operating experience in condenser service. An impressed current cathodic protection system and epoxy waterbox coating was also installed to prevent galvanic corrosion of the carbon steel waterboxes. The cathodic protection system included local alarm indication to alert plant operating staff of any system malfunction that could result in titanium hydrating. A comparison of the heat transfer characteristics of the existing condenser design with Admiralty tubes and a new tube bundle design with titanium tubes concluded that a new tube bundle design was required to optimize the condenser performance and accommodate the anticipated 8% power uprate. This paper will discuss the condenser optimization program from the design state to final installation. Further, it was decided to completely shop fabricate these four titanium tube bundles to minimize the site erection schedule. Each bundle measuring over 44 ft. (13.5 m) long, over 13 ft, (4 m) wide, and nearly 18 ft. (5.5 m) tall, weighed 195,000 lbs (88,450 kg). The weight and size of the bundles created a variety of fabrication, transportation and installation challenges that required extensive advanced planning, scheduling and coordination. The complete installation of the redesigned condenser tube bundles and waterboxes was accomplished during the Fourteenth Refueling Outage of ANO-1 in 1997.

Edgell, D.; Davidian, A.

1999-07-01T23:59:59.000Z

335

Method for improving performance of high temperature superconductors within a magnetic field  

DOE Patents [OSTI]

The present invention provides articles including a base substrate including a layer of an oriented cubic oxide material having a rock-salt-like structure layer thereon; and, a buffer layer upon the oriented cubic oxide material having a rock-salt-like structure layer, the buffer layer having an outwardly facing surface with a surface morphology including particulate outgrowths of from 10 nm to 500 run in size at the surface, such particulate outgrowths serving as flux pinning centers whereby the article maintains higher performance within magnetic fields than similar articles without the necessary density of such outgrowths.

Wang, Haiyan (Los Alamos, NM); Foltyn, Stephen R. (Los Alamos, NM); Maiorov, Boris A. (Los Alamos, NM); Civale, Leonardo (Los Alamos, NM)

2010-01-05T23:59:59.000Z

336

Control of household refrigerators. Part 2: Alternate control approaches for improving temperature performance and reducing energy use  

SciTech Connect (OSTI)

In Part 1 it was shown that conventional control of household refrigerators is achieved by regulating the distribution of air in the freezer compartment to all other parts of the plant. In Part 2 three alternative approaches to the conventional control of a top-mount refrigerator are presented: variable temperature bandwidths, uncoupled compressor and evaporator fan, and the combination of these two. These allowed the plant to achieve near-ideal control with respect to improved temperature performance in each compartment. Automatic airflow dampers were used with the dual controllers to independently regulate refrigerator compartment temperature. Plant performance was simulated using a model that computes the refrigerant and airflow systems behavior. Together, these alternate configurations and approaches define new control algorithms that reveal the plant's optimal control model for improving performance and energy usage relative to conventional controllers. Results based on model simulations are dependent upon the model's accuracy and validity. However, the model validation studies cited here, though limited in scope, do show agreement between simulation and experimental data for the ambient temperatures and thermal load conditions considered. This suggests that these model results are reasonable, and representative of actual plant behavior under these conditions and configurations for a top-mount style refrigerator plant.

Graviss, K.J.; Collins, R.L.

1999-07-01T23:59:59.000Z

337

Improving DOE Project Performance Using the DOD Integrated Master Plan - 12481  

SciTech Connect (OSTI)

DOE O 413 measures a project's progress to plan by the consumption of funding, the passage of time, and the meeting of milestones. In March of 2003, then Under Secretary, Energy, Science, Card received a memo directing the implementation of Project Management and the Project Management Manual, including the Integrated Master Plan and Integrated Master Schedule. This directive states 'the integrated master plan and schedule tie together all project tasks by showing their logical relationships and any constraints controlling the start or finish of each task. This process results in a hierarchy of related functional and layered schedules derived from the Work Breakdown Structure that can be used for monitoring and controlling project progress'. This paper shows how restoring the IMP/IMS paradigm to DOE program management increases the probability of program success in ways not currently available using DOD O 413 processes alone. Using DOE O 413 series guidance, adding the Integrated Master Plan and Integrated Master Schedule paradigm would provide a hierarchical set of performance measures for each 'package of work,' that provides measurable visibility to the increasing maturity of the project. This measurable maturity provides the mechanism to forecast future performance of cost, schedule, and technical outcomes in ways not available using just the activities in DOE O 413. With this information project managers have another tool available to address the issues identified in GAO-07-336 and GAO-09-406. (authors)

Alleman, Glen B. [DOD Programs, Project Time and Cost (United States); Nosbisch, Michael R. [Managing Principle, Western Region, Project Time and Cost (United States)

2012-07-01T23:59:59.000Z

338

Instruction-Window Power Reduction Using Data Dependence Metric  

E-Print Network [OSTI]

power savings, and with an average performance loss of a very modest 1.9%. I. INTRODUCTION NewInstruction-Window Power Reduction Using Data Dependence Metric Ziad Youssfi and Michael Shanblatt Department of Electrical and Computer Engineering Michigan State University East Lansing, MI 48824 ziad

Lee, Hsien-Hsin "Sean"

339

Establishment of an Industry-Driven Consortium Focused on Improving the Production Performance of Domestic Stripper Wells  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the U.S. Department of Energy (DOE), National Energy Technology Laboratory (NETL) has established a national industry-driven Stripper Well Consortium (SWC) that is focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. The consortium creates a partnership with the U.S. petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the seventh quarterly technical progress report for the SWC. Key activities for this reporting period include: (1) Nomination and election of the Executive Council members for the 2006-07 term, (2) Finalize and release the 2006 Request for Proposals (RFP), (3) Invoice and recruit members, (4) Plan for the spring meeting, (5) Improving communication efforts, and (6) Continue distribution of the DVD entitled: ''Independent Oil: Rediscovering American's Forgotten Wells''.

Joel L. Morrison; Sharon L. Elder

2006-04-21T23:59:59.000Z

340

Establishment of an Industry-Driven Consortium Focused on Improving the Production Performance of Domestic Stripper Wells  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the U.S. Department of Energy (DOE), National Energy Technology Laboratory (NETL) established a national industry-driven Stripper Well Consortium (SWC) that is focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. The consortium creates a partnership with the U.S. petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the eighth quarterly technical progress report for the SWC. Key activities for this reporting period include: (1) Organize and host the 2006 Spring Meeting in State College, PA to review and select projects for SWC co-funding; (2) Participation in the 2006 PA CleanEnergy Expo Energy Theater to air the DVD on ''Independent Oil: Rediscovering American's Forgotten Wells''; (3) New member additions; (4) Improving communications; and (5) Planning of the fall technology meetings.

Joel L. Morrison; Sharon L. Elder

2006-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Low-complexity atlas-based prostate segmentation by combining global, regional, and local metrics  

SciTech Connect (OSTI)

Purpose: To improve the efficiency of atlas-based segmentation without compromising accuracy, and to demonstrate the validity of the proposed method on MRI-based prostate segmentation application. Methods: Accurate and efficient automatic structure segmentation is an important task in medical image processing. Atlas-based methods, as the state-of-the-art, provide good segmentation at the cost of a large number of computationally intensive nonrigid registrations, for anatomical sites/structures that are subject to deformation. In this study, the authors propose to utilize a combination of global, regional, and local metrics to improve the accuracy yet significantly reduce the number of required nonrigid registrations. The authors first perform an affine registration to minimize the global mean squared error (gMSE) to coarsely align each atlas image to the target. Subsequently, atarget-specific regional MSE (rMSE), demonstrated to be a good surrogate for dice similarity coefficient (DSC), is used to select a relevant subset from the training atlas. Only within this subset are nonrigid registrations performed between the training images and the target image, to minimize a weighted combination of gMSE and rMSE. Finally, structure labels are propagated from the selected training samples to the target via the estimated deformation fields, and label fusion is performed based on a weighted combination of rMSE and local MSE (lMSE) discrepancy, with proper total-variation-based spatial regularization. Results: The proposed method was applied to a public database of 30 prostate MR images with expert-segmented structures. The authors’ method, utilizing only eight nonrigid registrations, achieved a performance with a median/mean DSC of over 0.87/0.86, outperforming the state-of-the-art full-fledged atlas-based segmentation approach of which the median/mean DSC was 0.84/0.82 when applying to their data set. Conclusions: The proposed method requires a fixed number of nonrigid registrations, independent of atlas size, providing desirable scalability especially important for a large or growing atlas. When applied to prostate segmentation, the method achieved better performance to the state-of-the-art atlas-based approaches, with significant improvement in computation efficiency. The proposed rationale of utilizing jointly global, regional, and local metrics, based on the information characteristic and surrogate behavior for registration and fusion subtasks, can be extended naturally to similarity metrics beyond MSE, such as correlation or mutual information types.

Xie, Qiuliang; Ruan, Dan, E-mail: druan@mednet.ucla.edu [The Department of Radiation Oncology, University of California Los Angeles, California 90095 (United States)] [The Department of Radiation Oncology, University of California Los Angeles, California 90095 (United States)

2014-04-15T23:59:59.000Z

342

Interim Report: Air-Cooled Condensers for Next Generation Geothermal Power Plants Improved Binary Cycle Performance  

SciTech Connect (OSTI)

As geothermal resources that are more expensive to develop are utilized for power generation, there will be increased incentive to use more efficient power plants. This is expected to be the case with Enhanced Geothermal System (EGS) resources. These resources will likely require wells drilled to depths greater than encountered with hydrothermal resources, and will have the added costs for stimulation to create the subsurface reservoir. It is postulated that plants generating power from these resources will likely utilize the binary cycle technology where heat is rejected sensibly to the ambient. The consumptive use of a portion of the produced geothermal fluid for evaporative heat rejection in the conventional flash-steam conversion cycle is likely to preclude its use with EGS resources. This will be especially true in those areas where there is a high demand for finite supplies of water. Though they have no consumptive use of water, using air-cooling systems for heat rejection has disadvantages. These systems have higher capital costs, reduced power output (heat is rejected at the higher dry-bulb temperature), increased parasitics (fan power), and greater variability in power generation on both a diurnal and annual basis (larger variation in the dry-bulb temperature). This is an interim report for the task ‘Air-Cooled Condensers in Next- Generation Conversion Systems’. The work performed was specifically aimed at a plant that uses commercially available binary cycle technologies with an EGS resource. Concepts were evaluated that have the potential to increase performance, lower cost, or mitigate the adverse effects of off-design operation. The impact on both cost and performance were determined for the concepts considered, and the scenarios identified where a particular concept is best suited. Most, but not all, of the concepts evaluated are associated with the rejection of heat. This report specifically addresses three of the concepts evaluated: the use of recuperation, the use of turbine reheat, and the non-consumptive use of EGS make-up water to supplement heat rejection

Daniel S. Wendt; Greg L. Mines

2010-09-01T23:59:59.000Z

343

Eu(III) Complexes of Octadentate 1-Hydroxy-2-pyridinones: Stability and Improved Photophysical Performance  

SciTech Connect (OSTI)

The luminescence properties of lanthanoid ions can be dramatically enhanced by coupling them to antenna ligands that absorb light in the UV-visible and then efficiently transfer the energy to the lanthanoid centre. The synthesis and the complexation of Ln{sup III} cations (Ln = Eu, Gd) for a ligand based on four 1-hydroxy-2-pyridinone (1,2-HOPO) chelators appended to a ligand backbone derived by linking two L-lysine units (3LI-bis-LYS) is described. This octadentate Eu{sup III} complex ([Eu(3LI-bis-LYS-1,2-HOPO)]{sup -}) has been evaluated in terms of its thermodynamic stability, UV-visible absorption and luminescence properties. For this complex, the conditional stability constant (pM) is 19.9, which is an order of magnitude higher than diethylenetriaminepentacetic acid at pH = 7.4. This Eu{sup III} complex also shows an almost two-fold increase in its luminescence quantum yield in aqueous solution (pH = 7.4) when compared with other octadentate ligands. Hence, despite a slight decrease of the molar absorption coefficient, a much higher brightness is obtained for [Eu(3LI-bis-LYS-1,2-HOPO)]{sup -}. This overall improvement was achieved by saturating the coordination sphere of the Eu{sup III} cation, yielding an increased metal-centred efficiency by excluding solvent water molecules from the metal's inner sphere.

Moore, Evan G.; D'Aleo, Anthony; Xu, Jide; Raymond, Kenneth N.

2009-05-29T23:59:59.000Z

344

NREL Provides Guidance to Improve Thermal Comfort in High-Performance Homes (Fact Sheet)  

SciTech Connect (OSTI)

This technical highlight describes NREL research to develop recommendations on HVAC system design and operating conditions to achieve optimal thermal comfort in high-performance homes. Researchers at the National Renewable Energy Laboratory (NREL) have developed recommendations to help residential heating, cooling, and ventilation (HVAC) designers select optimal supply inlet size and system operating conditions to maintain good thermal comfort in low heating and cooling load homes. This can be achieved by using high sidewall supply air jets to create proper combinations of air temperature and air motion in the occupied zone of the conditioned space. The design of air distribution systems for low-load homes is an integral part of residential system research and development in systems integration. As American homes become more energy efficient, space conditioning systems will be downsized. The downsizing will reach the point where the air flow volumes required to meet the remaining heating and cooling loads may be too small to maintain uniform room air mixing, which can affect thermal comfort. NREL researchers performed a detailed study evaluating the performance of high sidewall supply air jets over a wide range of parameters including supply air temperature, supply air velocity, and supply inlet size. They found that in heating mode, low and intermediate supply temperatures of 95 F (308 K) and 105 F (314 K) maintained acceptable comfort levels at lower fan powers than can be achieved at 120 F (322 K) supply temperatures. For the high supply temperature of 120 F (322 K), higher fan powers (supply velocities) were required to overcome buoyancy effects and reach a good mixing in the room. In cooling mode, a supply temperature of 55 F (286 K) provided acceptable comfort levels. A small supply inlet of 8-in. (0.2 m) x 1-in. (0.025 m) is recommended in both heating and cooling modes. Computational fluid dynamics was used to model heat transfer and airflow in the room. The technique consists of using the model output to determine how well the supply air mixes with the room air. Thermal comfort is evaluated by determining the Air Diffusion Performance Index (ADPI). The level of comfort is evaluated by monitoring air temperature and air velocity in more than 600,000 control volumes that make up the occupied zone of a single room. The room has an acceptable comfort level when more than 70% of the control volumes meet the comfort criteria on both air temperature and air velocity. Figure 1 illustrates the plots of acceptable draft temperature, which is between -3 (-1.7) and 2 F (1.1 K) for two supply velocities of 394 fpm (2 m/s) (a) and 788 fpm (4 m/s) (b) when the room was supplied by 55 F (286 K) air. The plots show the distribution at selected cross-sections along the room. Colored regions on each cross-section are considered comfortable (blue regions are on the cold side and red regions are on the warm side). Regions of acceptable draft temperature are larger at low velocity and decrease as the velocity increases. As a result, the supply velocity of 394 fpm (2 m/s) provided higher comfort level than the supply velocity of 788 fpm (4 m/s). Work is in progress at NREL to extend this research to evaluate additional configurations and to integrate this system into a whole-house context.

Not Available

2012-01-01T23:59:59.000Z

345

Using Post-Occupancy Evaluation to Inform Design and Improve Performance  

E-Print Network [OSTI]

p p ro a c h e s t o p e rf o rm a n c e actual performance – lighting 0 20 40 60 80 100 Gloria Marshall ES Garrett ES York ES * highest rating in SHW study * Re-site Partial re-site New design %age satisfaction rate ESL-KT-13-12-15 CATEE 2013...: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 0 5 10 15 20 25 30 35 Gloria Marshall ES Garrett ES York ES Actual 25.2 kBTU/sqft/yr Predicted 18.4 kBTU/sqft/yr Actual 23.9 kBTU/sqft/yr Predicted 32.3 kBTU/sqft/yr No energy...

Langer, S.

2013-01-01T23:59:59.000Z

346

Improved resins and novel materials and methods for solid phase extraction and high performance liquid chromatography  

SciTech Connect (OSTI)

Solid-phase extraction (SPE) has grown to be one of the most widely used methods for isolation and preconcentration of a vast range of compounds from aqueous solutions. By modifying polymeric SPE resins with chelating functional groups, the selective uptake of metals was accomplished. The resin, along with adsorbed metals, was vaporized in the ICP and detection of the metals was then possible using either mass or emission spectroscopy. Drug analyses in biological fluids have received heightened attention as drug testing is on the increase both in sports and in the work environment. By using a direct-injection technique, biological fluids can be injected directly into the liquid chromatographic system with no pretreatment. A new surfactant, a sulfonated form of Brij-30 (Brij-S) is shown to prevent the uptake of serum proteins on commercial HPLC columns by forming a thin coating on the silica C18 surface. Excellent separations of eight or more drugs with a wide range of retention times were obtained. The separations had sharper peaks and lower retention times than similar separations performed with the surfactant sodium dodecylsulfate (SDS). Quantitative recovery of a number of drugs with limits of detection near 1 ppm with a 5 {micro}l injection volume were obtained. Finally, a method for solid-phase extraction in a syringe is introduced. The system greatly reduced the volume of solvent required to elute adsorbed analytes from the SPE bed while providing a semi-automated setup. SPE in a syringe consists of a very small bed of resin-loaded membrane packed into a GC or HPLC syringe. After extraction, elution was performed with just a few {micro}l of solvent. This small elution volume allowed injection of the eluent directly from the syringe into the chromatographic system, eliminating the handling problems associated with such small volumes.

Freeze, R.

1997-10-08T23:59:59.000Z

347

Effect of updated data base and improved analysis on performance of radioisotope thermophotovoltaic converter  

SciTech Connect (OSTI)

Previous analyses of RTPV space power systems published by the authors were based on a number of approximations employed to permit early dissemination of preliminary results pending availability of fuller experimental data need3d to conduct more rigorous analyses. Among those approximations were: (1) the use of limited test data and optimistic projections of the spectral transmissivity of the RTPV`s selective IR filters and of the spectral quantum efficiency of the GaSb PV cells; (2) the use of theoretical formulas instead of experimental measurements of the PV cell`s open-circuit voltage, fill factor, and optimum voltage instead of its measured current-voltage characteristics; (3) rough estimates of the TPV converter`s active-area fraction instead of computed values based on detailed designs; (4) inadequate accounting for the effect of radiation reflected by the IR filter and absorbed by the emitter in reducing the generator`s required heat input; and (5) omission of the shadowing effect and ohmic losses caused by the PV cell`s grid lines. The above-listed shortcomings of the previously published analyses are addressed in the present paper, which describes revised analyses based on recently obtained experimental data of IR filter reflectivities and PV cell quantum efficiencies and current-voltage characteristic, measured by EDTEK under an OSC-initiated subcontract to its ongoing DOE contract. Their test results show that EDTEK has been eminently successful in improving the reflectivities of the IR filters and in reproducing the quantum efficiencies of Boeing`s best PV cells, but their initial (Dec-95) PV cell fell far short of matching the open-circuit voltages and fill factors predicted by theory.

Schock, A.; Or, C.T. [Orbital Sciences Corp., Germantown, MD (United States)

1996-12-31T23:59:59.000Z

348

Evaluation of Climate-Based Daylight Performance in Tropical Office Buildings- A Case Study  

E-Print Network [OSTI]

and Z. Rogers, Dynamic Daylight Performance Metrics forof interior design on the daylight availability in open plan2002. [14] Z. Rogers, Daylight metric development using

Szu-Cheng, CHIEN; King Jet, TSENG

2013-01-01T23:59:59.000Z

349

Reach: A low cost-approach to reducing stack emissions and improving the performance of oil-fired boilers  

SciTech Connect (OSTI)

Improved oil combustion technology, based upon optimization of oil atomizer and flame stabilizer design, has been retrofit to oil-fired boilers to reduce NO{sub x} emissions, particulate matter emissions, and opacity, and to provide operational and performance benefits. This technology, referred to as REACH, can be retrofit to wall-fired and tangential-fired boilers at a cost of less than $0.75/kW, a fraction of the cost of installing new burners. The technology is compatible with conventional NO{sub x} controls such as overfire air, flue gas recirculation, and low-NO{sub x} burners, and can be combined with these techniques to further reduce NO{sub x} emissions. REACH has been applied to eighty boilers representing over 14,000 MW of generating capacity. This paper describes REACH technology, its applicability and cost, and the emissions and performance results achieved in full scale applications.

Giovanni, D.V.; McElroy, M.W.; Kerho, S.E. [Electric Power Technologies, Inc., Menlo Park, CA (United States)

1996-01-01T23:59:59.000Z

350

ESTABLISHMENT OF AN INDUSTRY-DRIVEN CONSORTIUM FOCUSED ON IMPROVING THE PRODUCTION PERFORMANCE OF DOMESTIC STRIPPER WELLS  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the U.S. Department of Energy (DOE), National Energy Technology Laboratory (NETL), will establish, promote, and manage a national industry-driven Stripper Well Consortium (SWC) that will be focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. The consortium creates a partnership with the U.S. petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the eighth quarterly technical progress report for the SWC. Key activities for this reporting period include: (1) issuing subcontracts, (2) SWC membership class expansion, (3) planning SWC technology transfer meetings, and (4) extending selected 2001 project periods of performance. In addition, a literature search that focuses on the use of lasers, microwaves, and acoustics for potential stripper well applications continued.

Joel L. Morrison

2002-09-27T23:59:59.000Z

351

Improved Recovery Boiler Performance Through Control of Combustion, Sulfur, and Alkali Chemistry  

SciTech Connect (OSTI)

This project involved the following objectives: 1. Determine black liquor drying and devolatilization elemental and total mass release rates and yields. 2. Develop a public domain physical/chemical kinetic model of black liquor drop combustion, including new information on drying and devolatilization. 3. Determine mechanisms and rates of sulfur scavenging in recover boilers. 4. Develop non-ideal, public-domain thermochemistry models for alkali salts appropriate for recovery boilers 5. Develop data and a one-dimensional model of a char bed in a recovery boiler. 6. Implement all of the above in comprehensive combustion code and validate effects on boiler performance. 7. Perform gasification modeling in support of INEL and commercial customers. The major accomplishments of this project corresponding to these objectives are as follows: 1. Original data for black liquor and biomass data demonstrate dependencies of particle reactions on particle size, liquor type, gas temperature, and gas composition. A comprehensive particle submodel and corresponding data developed during this project predicts particle drying (including both free and chemisorbed moisture), devolatilization, heterogeneous char oxidation, char-smelt reactions, and smelt oxidation. Data and model predictions agree, without adjustment of parameters, within their respective errors. The work performed under these tasks substantially exceeded the original objectives. 2. A separate model for sulfur scavenging and fume formation in a recovery boiler demonstrated strong dependence on both in-boiler mixing and chemistry. In particular, accurate fume particle size predictions, as determined from both laboratory and field measurements, depend on gas mixing effects in the boilers that lead to substantial particle agglomeration. Sulfur scavenging was quantitatively predicted while particle size required one empirical mixing factor to match data. 3. Condensed-phase thermochemistry algorithms were developed for salt mixtures and compared with sodium-based binary and higher order systems. Predictions and measurements were demonstrated for both salt systems and for some more complex silicate-bearing systems, substantially exceeding the original scope of this work. 4. A multi-dimensional model of char bed reactivity developed under this project demonstrated that essentially all reactions in char beds occur on or near the surface, with the internal portions of the bed being essentially inert. The model predicted composition, temperature, and velocity profiles in the bed and showed that air jet penetration is limited to the immediate vicinity of the char bed, with minimal impact on most of the bed. The modeling efforts substantially exceeded the original scope of this project. 5. Near the completion of this project, DOE withdrew the BYU portion of a multiparty agreement to complete this and additional work with no advanced warning, which compromised the integration of all of this material into a commercial computer code. However, substantial computer simulations of much of this work were initiated, but not completed. 6. The gasification modeling is nearly completed but was aborted near its completion according to a DOE redirection of funds. This affected both this and the previous tasks.

Baxter, Larry L.

2008-06-09T23:59:59.000Z

352

SPINEL-BASED REFRACTORIES FOR IMPROVED PERFORMANCE IN COAL GASIFICATION ENVIRONMENTS  

SciTech Connect (OSTI)

Oak Ridge National Laboratory, in collaboration with refractory manufacturer Minteq International, Inc., academic partner Missouri University of Science and Technology and refractory end users have developed novel refractory systems and techniques to reduce energy consumption of refractory lined vessels. The objective of this U.S. DOE funded project was to address the need for innovative refractory compositions by developing MgO-Al 2O3 spinel gunnable refractory compositions utilizing new aggregate materials, bond systems, protective coatings, and phase formation techniques. Materials have been developed specifically for coal gasification environments and work has been performed to develop and apply low cost coatings using a colloidal approach for protection against attack of the refractory brick by the service environment and to develop a light-weight back-up refractory system to help offset the high thermal conductivity inherent in spinel materials. This paper discusses the systematic development of these materials, laboratory testing and evaluation of these materials, and relevant results achieved toward the reduction of chemical reactions and mechanical degradation by the service environment though compositional and processing modifications.

Hemrick, James Gordon [ORNL; Armstrong, Beth L [ORNL; Rodrigues-Schroer, Angela [Minteq International, Inc.; Colavito, [Minteq International, Inc.; Smith, Jeffrey D [ORNL; O'Hara, Kelley [University of Missouri, Rolla

2013-01-01T23:59:59.000Z

353

Improving the Field Performance of Natural Gas Furnaces, Chicago, Illinois (Fact Sheet)  

SciTech Connect (OSTI)

The objective of this project is to examine the impact that common installation practices and age-induced equipment degradation may have on the installed performance of natural gas furnaces, as measured by steady-state efficiency and AFUE. PARR identified twelve furnaces of various ages and efficiencies that were operating in residential homes in the Des Moines Iowa metropolitan area and worked with a local HVAC contractor to retrieve them and test them for steady-state efficiency and AFUE in the lab. Prior to removal, system airflow, static pressure, equipment temperature rise, and flue loss measurements were recorded for each furnace. After removal from the field the furnaces were transported to the Gas Technology Institute (GTI) laboratory, where PARR conducted steady-state efficiency and AFUE testing. The test results show that steady-state efficiency in the field was 6.4% lower than that measured for the same furnaces under standard conditions in the lab, which included tuning the furnace input and air flow rate. Comparing AFUE measured under ASHRAE standard conditions with the label value shows no reduction in efficiency for the furnaces in this study over their 15 to 24 years of operation when tuned to standard conditions. Further analysis of the data showed no significant correlation between efficiency change and the age or the rated efficiency of the furnace.

Rothgeb, S.; Brand, L.

2013-11-01T23:59:59.000Z

354

Multi-Metric Sustainability Analysis  

SciTech Connect (OSTI)

A readily accessible framework that allows for evaluating impacts and comparing tradeoffs among factors in energy policy, expansion planning, and investment decision making is lacking. Recognizing this, the Joint Institute for Strategic Energy Analysis (JISEA) funded an exploration of multi-metric sustainability analysis (MMSA) to provide energy decision makers with a means to make more comprehensive comparisons of energy technologies. The resulting MMSA tool lets decision makers simultaneously compare technologies and potential deployment locations.

Cowlin, S.; Heimiller, D.; Macknick, J.; Mann, M.; Pless, J.; Munoz, D.

2014-12-01T23:59:59.000Z

355

Plasma Performance Improvement with Lithium-Coated Plasma-Facing Components in NSTX  

SciTech Connect (OSTI)

Lithium as a plasma-facing material has many attractive features, including a reduction in the recycling of hydrogenic species and the potential for withstanding high heat and neutron fluxes in fusion reactors. Recent NSTX experiments have shown, for the first time, significant and recurring benefits of lithium coatings on plasma-facing components (PFC's) to the performance of divertor plasmas in both L- and H- mode confinement regimes heated by high-power neutral beams. They included decreases in the plasma density and inductive flux consumption, and increases in the electron temperature, ion temperature, energy confinement time, and DD neutron rate. Extended periods of MHD quiescence were also achieved, and measurements of the visible emission from the lower divertor showed a reduction in the deuterium, carbon, and oxygen line emission. Other salient results with lithium evaporation included a broadening of the electron temperature profile, and changes in edge density gradients that benefited electron Bernstein wave coupling. There was also a reduction in ELM frequency and amplitude, followed by a period of complete ELM suppression. In general, it was observed that both the best and the average confinement occurred after lithium deposition and that the increase in WMHD occurs mostly through an increase in We. In addition, a liquid lithium divertor (LLD) is being installed on NSTX this year. As the first fully-toroidal liquid metal divertor target, experiments with the LLD can provide insight into the behavior of metallic ITER PFC's should they liquefy during high-power divertor tokamak operations. The NSTX lithium coating and LLD experiments are important near-term steps in demonstrating the potential of liquid lithium as a solution to the first-wall problem for both magnetic and inertial fusion reactors.

Kaita, R; Kugel, H; Bell, M G; Bell, R; Boedo, J; Bush, C; Ellis, R; Gates, D; Gerhardt, S; Gray, T; Kallman, J; Kaye, S; LeBlanc, B; Majeski, R; Maingi, R; Mansfield, D; Menard, J; Mueller, D; Ono, M; Paul, S; Raman, R; Roquemore, A L; Ross, P W; Sabbagh, S; Schneider, H; Skinner, S H; Soukhanovskii, V; Stevenson, T; Stotler, D; Timberlake, J; Zakharov, L; Ahn, J; Allain, J P; Wampler, W R

2009-01-08T23:59:59.000Z

356

Plasma Performance Improvements with Liquid Lithium Limiters in CDX-U  

SciTech Connect (OSTI)

The use of flowing liquid lithium as a first wall for a reactor has potentially attractive physics and engineering features. The Current Drive experiment-Upgrade (CDX-U) at the Princeton Plasma Physics Laboratory has begun experiments with a fully toroidal liquid lithium limiter. CDX-U is a compact [R = 34 cm, a = 22 cm, Btoroidal = 2 kG, IP =100 kA, T(subscript)e(0) {approx} 100 eV, n(subscript)e(0) {approx} 5 x 10{sup 19} m-3] short-pulse (<25 msec) spherical tokamak with extensive diagnostics. The limiter, which consists of a shallow circular stainless steel tray of radius 34 cm and width 10 cm, can be filled with lithium to a depth of a few millimeters, and forms the lower limiting surface for the discharge. Heating elements beneath the tray are used to liquefy the lithium prior to the experiment. The total area of the tray is approximately 2000 cm{sup 2}. The tokamak edge plasma, when operated in contact with the lithium-filled tray, shows evidence of reduced impurities and recycling. The reduction in re cycling and impurities is largest when the lithium is liquefied by heating to 250 degrees Celsius. Discharges which are limited by the liquid lithium tray show evidence of performance enhancement. Radiated power is reduced and there is spectroscopic evidence for increases in the core electron temperature. Furthermore, the use of a liquid lithium limiter reduces the need for conditioning discharges prior to high current operation. The future development path for liquid lithium limiter systems in CDX-U is also discussed.

R. Majeski; M. Boaz; D. Hoffman; B. Jones; R. Kaita; H. Kugel; T. Munsat; J. Spaleta; V. Soukhanovskii; J. Timberlake; L. Zakharov; G. Antar; R. Doerner; S. Luckhardt; R.W. Conn; M. Finkenthal; D. Stutman; R. Maingi; and M. Ulrickson

2002-07-12T23:59:59.000Z

357

Plasma Performance Improvement with Lithium-Coated Plasma-Facing Components in NSTX  

SciTech Connect (OSTI)

Lithium as a plasma-facing material has many attractive features, including a reduction in the recycling of hydrogenic species and the potential for withstanding high heat and neutron fluxes in fusion reactors. Recent NSTX experiments have shown, for the first time, significant and recurring benefits of lithium coatings on plasma-facing components (PFC's) to the performance of divertor plasmas in both L- and H- mode confinement regimes heated by high-power neutral beams. They included decreases in the plasma density and inductive flux consumption, and increases in the electron temperature, ion temperature, energy confinement time, and DD neutron rate. Extended periods of MHD quiescence were also achieved, and measurements of the visible emission from the lower divertor showed a reduction in the deuterium, carbon, and oxygen line emission. Other salient results with lithium evaporation included a broadening of the electron temperature profile, and changes in edge density gradients that benefited electron Bernstein wave coupling. There was also a reduction in ELM frequency and amplitude, followed by a period of complete ELM suppression. In general, it was observed that both the best and the average confinement occurred after lithium deposition and that the increase in WMHD occurs mostly through an increase in We. In addition, a liquid lithium divertor (LLD) is being installed on NSTX this year. As the first fully-toroidal liquid metal divertor target, experiments with the LLD can provide insight into the behavior of metallic ITER PFC's should they liquefy during high-power divertor tokamak operations. The NSTX lithium coating and LLD experiments are important near-term steps in demonstrating the potential of liquid lithium as a solution to the first-wall problem for both magnetic and inertial fusion reactors.

Kaita, R., et. al.

2008-09-29T23:59:59.000Z

358

Daylight metrics and energy savings  

E-Print Network [OSTI]

with various ‘performance indicators’ becomes ever moreextent that such performance indicators are crude, or the

Mardaljevic, John

2011-01-01T23:59:59.000Z

359

NREL Evaluates the Thermal Performance of Uninsulated Walls to Improve the Accuracy of Building Energy Simulation Tools (Fact Sheet)  

SciTech Connect (OSTI)

This technical highlight describes NREL research to develop models of uninsulated wall assemblies that help to improve the accuracy of building energy simulation tools when modeling potential energy savings in older homes. Researchers at the National Renewable Energy Laboratory (NREL) have developed models for evaluating the thermal performance of walls in existing homes that will improve the accuracy of building energy simulation tools when predicting potential energy savings of existing homes. Uninsulated walls are typical in older homes where the wall cavities were not insulated during construction or where the insulating material has settled. Accurate calculation of heat transfer through building enclosures will help determine the benefit of energy efficiency upgrades in order to reduce energy consumption in older American homes. NREL performed detailed computational fluid dynamics (CFD) analysis to quantify the energy loss/gain through the walls and to visualize different airflow regimes within the uninsulated cavities. The effects of ambient outdoor temperature, radiative properties of building materials, and insulation level were investigated. The study showed that multi-dimensional airflows occur in walls with uninsulated cavities and that the thermal resistance is a function of the outdoor temperature - an effect not accounted for in existing building energy simulation tools. The study quantified the difference between CFD prediction and the approach currently used in building energy simulation tools over a wide range of conditions. For example, researchers found that CFD predicted lower heating loads and slightly higher cooling loads. Implementation of CFD results into building energy simulation tools such as DOE2 and EnergyPlus will likely reduce the predicted heating load of homes. Researchers also determined that a small air gap in a partially insulated cavity can lead to a significant reduction in thermal resistance. For instance, a 4-in. tall air gap (Figure 1a) led to a 15% reduction in resistance. Similarly, a 2-ft tall air gap (Figure 1c) led to 54% reduction in thermal resistance. NREL researchers plan to extend this study to include additional wall configurations, and also to evaluate the performance of attic spaces with different insulation levels. NREL's objective is to address each potential issue that leads to inaccuracies in building energy simulation tools to improve the predictions.

Not Available

2012-01-01T23:59:59.000Z

360

Comparing Resource Adequacy Metrics: Preprint  

SciTech Connect (OSTI)

As the penetration of variable generation (wind and solar) increases around the world, there is an accompanying growing interest and importance in accurately assessing the contribution that these resources can make toward planning reserve. This contribution, also known as the capacity credit or capacity value of the resource, is best quantified by using a probabilistic measure of overall resource adequacy. In recognizing the variable nature of these renewable resources, there has been interest in exploring the use of reliability metrics other than loss of load expectation. In this paper, we undertake some comparisons using data from the Western Electricity Coordinating Council in the western United States.

Ibanez, E.; Milligan, M.

2014-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Metric Construction | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat JumpIncMAKGalwayHydrothermalMcFarlandSurveyREDD Projects | OpenMetric

362

BNL | CFN Strategic Plan | Metrics  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScience Program CumulusA t iBudget2/4/13 Page 1 of 2BNLBusinessMetrics

363

ESTABLISHMENT OF AN INDUSTRY-DRIVEN CONSORTIUM FOCUSED ON IMPROVING THE PRODUCTION PERFORMANCE OF DOMESTIC STRIPPER WELLS  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the U.S. Department of Energy, National Energy Technology Laboratory will establish, promote, and manage a national industry-driven Stripper Well Consortium (SWC) that will be focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. The consortium creates a partnership with the U.S. petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the seventeenth quarterly technical progress report for the SWC. Key activities for this reporting period include: (1) organizing and hosting the SWC fall technology transfer meetings in Oklahoma City, Oklahoma and State College, Pennsylvania, (2) planning of the upcoming SWC spring proposal meeting, (3) release of the SWC Request-for-proposals (RFP), (4) revision of the SWC By-Laws, and (5) the SWC Executive Council nomination and election for 2005-2006 term members.

Joel L. Morrison

2005-01-04T23:59:59.000Z

364

Thin Metal Oxide Films to Modify a Window Layer in CdTe-Based Solar Cells for Improved Performance  

SciTech Connect (OSTI)

We report on CdS/CdTe photovoltaic devices that contain a thin Ta2O5 film deposited onto the CdS window layer by sputtering. We show that for thicknesses below 5 nm, Ta2O5 films between CdS and CdTe positively affect the solar cell performance, improving JSC, VOC, and the cell power conversion efficiency despite the insulating nature of the interlayer material. Using the Ta2O5 interlayer, a VOC gain of over 100 mV was demonstrated compared to a CdTe/CdS baseline. Application of a 1nm Ta2O5 interlayer enabled the fabrication of CdTe solar cells with extremely thin (less than 30 nm) CdS window layers. The efficiency of these cells exceeded that of a base line cell with 95 nm of CdS.

Lemmon, John P.; Polikarpov, Evgueni; Bennett, Wendy D.; Kovarik, Libor

2012-05-05T23:59:59.000Z

365

ESTABLISHMENT OF AN INDUSTRY-DRIVEN CONSORTIUM FOCUSED ON IMPROVING THE PRODUCTION PERFORMANCE OF DOMESTIC STRIPPER WELLS  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the US Department of Energy, National Energy Technology Laboratory will establish, promote, and manage a national industry-driven stripper Well Consortium (SWC) that will be focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. The consortium creates a partnership with the US petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the four quarterly technical progress report for the SWC. During this reporting period, Penn State primary focus was on finalizing all subcontracts, planning the SWC technology transfer meeting and two workshops in the southern US, and preparing the next SWC newsletter. Membership in the SWC now stands at 49.

Joel L. Morrison

2001-09-14T23:59:59.000Z

366

ESTABLISHMENT OF AN INDUSTRY-DRIVEN CONSORTIUM FOCUSED ON IMPROVING THE PRODUCTION PERFORMANCE OF DOMESTIC STRIPPER WELLS  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the U.S. Department of Energy, National Energy Technology Laboratory will establish, promote, and manage a national industry-driven Stripper Well Consortium (SWC) that will be focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. The consortium creates a partnership with the U.S. petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the ninth quarterly technical progress report for the SWC. Key activities for this reporting period include: (1) organizing and hosting two fall technology transfer meetings, (2) SWC membership class expansion, and (3) planning the SWC 2003 Spring meeting. In addition, a literature search that focuses on the use of lasers, microwaves, and acoustics for potential stripper well applications continued.

Joel L. Morrison

2003-04-08T23:59:59.000Z

367

Establishment of an Industry-Driven Consortium Focused on Improving the Production Performance of Domestic Stripper Wells  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the U.S. Department of Energy, National Energy Technology Laboratory will establish, promote, and manage a national industry-driven Stripper Well Consortium (SWC) that will be focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. The consortium creates a partnership with the U.S. petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the sixth quarterly technical progress report for the SWC. Key activities for this reporting period included: (1) Organized and hosted two technology transfer meetings; (2) Collaborated with the Pennsylvania Oil and Gas Association (POGAM) to host a Natural Gas Outlook conference in Pittsburgh, PA; (3) Provided a SWC presentation at the Interstate Oil and Gas Compact Commission (IOGCC) meeting in Jackson Hole, WY; and (4) Completed and released a stripper well industry documentary entitled: ''Independent Oil: Rediscovering America's Forgotten Wells''.

Joel Morrison; Sharon Elder

2006-01-24T23:59:59.000Z

368

Fuel performance improvement program: description and characterization of HBWR Series H-2, H-3, and H-4 test rods  

SciTech Connect (OSTI)

The fabrication process and as-built characteristics of the HBWR Series H-2 and H-3 test rods, as well as the three packed-particle (sphere-pac) rods in HBWR Series H-4 are described. The HBWR Series H-2, H-3, and H-4 tests are part of the irradiation test program of the Fuel Performance Improvement Program. Fifteen rods were fabricated for the three test series. Rod designs include: (1) a reference dished pellet design incorporating chamfered edges, (2) a chamfered, annular pellet design combined with graphite-coated cladding, and (3) a sphere-pac design. Both the annular-coated and sphere-pac designs include internal pressurization using helium.

Guenther, R.J.; Barner, J.O.; Welty, R.K.

1980-03-01T23:59:59.000Z

369

Generalized utility metrics for supercomputers  

E-Print Network [OSTI]

marketplace of high-performance computing. Parall Comput 3.Power ef?ciency · High performance computing market analysisactual installed high performance computing (HPC) systems

Strohmaier, Erich

2009-01-01T23:59:59.000Z

370

Radiation-dominated area metric cosmology  

E-Print Network [OSTI]

We provide further crucial support for a refined, area metric structure of spacetime. Based on the solution of conceptual issues, such as the consistent coupling of fermions and the covariant identification of radiation fields on area metric backgrounds, we show that the radiation-dominated epoch of area metric cosmology is equivalent to that epoch in standard Einstein cosmology. This ensures, in particular, successful nucleosynthesis. This surprising result complements the previously derived prediction of a small late-time acceleration of an area metric universe.

Frederic P. Schuller; Mattias N. R. Wohlfarth

2007-06-12T23:59:59.000Z

371

Defining a Standard Metric for Electricity Savings  

E-Print Network [OSTI]

1991. The Potential for Electricity Efficiency Improvementswww.eia.doe.gov/cneaf/electricity/page/eia860.html>. FigureA STANDARD METRIC FOR ELECTRICITY SAVINGS Jonathan Koomey*,

Koomey, Jonathan

2009-01-01T23:59:59.000Z

372

Implicit Multifunction Theorems in complete metric spaces  

E-Print Network [OSTI]

Implicit Multifunction Theorems in complete metric spaces. Huynh Van Ngai ? Nguyen Huu Tron† and. Michel Théra ‡. Abstract. In this paper, we establish some ...

2010-06-10T23:59:59.000Z

373

EXTREMAL METRIC FOR THE FIRST EIGENVALUE ON A KLEIN BOTTLE  

E-Print Network [OSTI]

EXTREMAL METRIC FOR THE FIRST EIGENVALUE ON A KLEIN BOTTLE DMITRY JAKOBSON, NIKOLAI NADIRASHVILI extremal metrics. The only known extremal metrics are a round sphere, a standard projective plane, a Clifford torus and an equilateral torus. We construct an extremal metric on a Klein bottle. It is a metric

Leclercq, Remi

374

EXTREMAL METRIC FOR THE FIRST EIGENVALUE ON A KLEIN BOTTLE  

E-Print Network [OSTI]

EXTREMAL METRIC FOR THE FIRST EIGENVALUE ON A KLEIN BOTTLE DMITRY JAKOBSON, NIKOLAI NADIRASHVILI extremal metrics. The only known extremal metrics are a round sphere, a standard projective plane, a Cli#11;ord torus and an equilateral torus. We construct an extremal metric on a Klein bottle. It is a metric

Jakobson, Dmitry

375

Reparametrization invariance of the classical metric  

E-Print Network [OSTI]

There is a statement on the parametrization dependence of the classical metric in the recent paper of N.E.J. Bjerrum-Bohr, J.F. Donoghue, B.R. Holstein, gr-qc/0610096. I completely disagree with this statement. Here I show reparametrization invariance of the classical metric.

G. G. Kirilin

2006-11-16T23:59:59.000Z

376

Topology on locally finite metric spaces  

E-Print Network [OSTI]

The necessity of a theory of General Topology and, most of all, of Algebraic Topology on locally finite metric spaces comes from many areas of research in both Applied and Pure Mathematics: Molecular Biology, Mathematical Chemistry, Computer Science, Topological Graph Theory and Metric Geometry. In this paper we propose the basic notions of such a theory and some applications: we replace the classical notions of continuous function, homeomorphism and homotopic equivalence with the notions of NPP-function, NPP-local-isomorphism and NPP-homotopy (NPP stands for Nearest Point Preserving); we also introduce the notion of NPP-isomorphism. We construct three invariants under NPP-isomorphisms and, in particular, we define the fundamental group of a locally finite metric space. As first applications, we propose the following: motivated by the longstanding question whether there is a purely metric condition which extends the notion of amenability of a group to any metric space, we propose the property SN (Small Neighb...

Capraro, Valerio

2011-01-01T23:59:59.000Z

377

ESTABLISHMENT OF AN INDUSTRY-DRIVEN CONSORTIUM FOCUSED ON IMPROVING THE PRODUCTION PERFORMANCE OF DOMESTIC STRIPPER WELLS  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the US Department of Energy, National Energy Technology Laboratory will establish, promote, and manage a national industry-driven Stripper Well Consortium (SWC) that will be focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. the consortium creates a partnership with the US petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the third quarterly technical progress report for the SWC. During this reporting period the SWC entered into a co-funding arrangement with the New York State Energy Development Authority (NYSERDA) to provide an additional $100,000 in co-funding for stripper well production-orientated projects.The SWC hosted its first meeting in which members proposed research projects to the SWC membership. The meeting was held on April 9-10, 2001 in State College, Pennsylvania. Twenty three proposals were submitted to the SWC for funding consideration. Investigators of the proposed projects provided the SWC membership with a 20 minute (15 minute technical discussion, 5 minute question and answer session) presentation. Of the 23 proposals, the Executive Council approved $921,000 in funding for 13 projects. Penn State then immediately started the process of issuing subcontracts to the various projects approved for funding.

Joel L. Morrison

2001-09-12T23:59:59.000Z

378

ESTABLISHMENT OF AN INDUSTRY-DRIVEN CONSORTIUM FOCUSED ON IMPROVING THE PRODUCTION PERFORMANCE OF DOMESTIC STRIPPER WELLS  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the U.S. Department of Energy, National Energy Technology Laboratory will establish, promote, and manage a national industry-driven Stripper Well Consortium (SWC) that will be focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. The consortium creates a partnership with the U.S. petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the thirteenth quarterly technical progress report for the SWC. Key activities for this reporting period included: (1) hosting three fall technology transfer meetings in Wyoming, Texas, and Pennsylvania, (2) releasing the 2004 SWC request-for-proposal (RFP), and (3) initial planning of the SWC spring meeting in Golden Colorado for selecting the 2004 SWC projects. The Fall technology transfer meetings attracted 100+ attendees between the three workshops. The SWC membership which attended the Casper, Wyoming workshop was able to see several SWC-funded projects operating in the field at the Rocky Mountain Oilfield Testing Center. The SWC is nearing the end of its initial funding cycle. The Consortium has a solid membership foundation and a demonstrated ability to review and select projects that have relevancy to meet the needs of domestic stripper well operators.

Joel L. Morrison

2004-05-17T23:59:59.000Z

379

adaptive metric knn: Topics by E-print Network  

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

We also prove that the set of points where a path with values in a metric space Maleva, Olga 97 SOBOLEV METRICS ON THE MANIFOLD OF ALL RIEMANNIAN METRICS Mathematics Websites...

380

Implementing an Energy Management System at TOTAL Prot Arthur Refinery: The process to improving and sustaining energy efficiency performance at a facility.  

E-Print Network [OSTI]

PROPRIETARY INFORMATION? 2011 KBC Advanced Technologies plc. All Rights Reserved. Implementing an Energy Management System at TOTAL Port Arthur Refinery: The process to improving and sustaining energy efficiency performance at a facility May... Improvements ? Cost-savings initiatives ? Increasing environmental awareness ? Increasing throughput by debottlenecking processes ? Increasing government mandates 2May 2013 Energy Costs for a 200kBPD Complex refinery Typically, energy efficiency programs...

Hoyle, A.

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Healthcare Project Performance Benchmarks  

Broader source: Energy.gov [DOE]

Reports five major performance metrics that can be used to benchmark proposed energy service company projects within the healthcare industry, disaggregated and reported by major retrofit strategy. Author: U.S. Department of Energy

382

EAC Presentation: Metrics and Benefits Analysis for the ARRA...  

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

Metrics and Benefits Analysis for the ARRA Smart Grid Programs - March 10, 2011 EAC Presentation: Metrics and Benefits Analysis for the ARRA Smart Grid Programs - March 10, 2011...

383

Invariant torsion and G_2-metrics  

E-Print Network [OSTI]

We introduce and study a notion of invariant intrinsic torsion geometry which appears, for instance, in connection with the Bryant-Salamon metric on the spinor bundle over S^3. This space is foliated by six-dimensional hypersurfaces, each of which carries a particular type of SO(3)-structure; the intrinsic torsion is invariant under SO(3). The last condition is sufficient to imply local homogeneity of such geometries, and this allows us to give a classification. We close the circle by showing that the Bryant-Salamon metric is the unique complete metric with holonomy G_2 that arises from SO(3)-structures with invariant intrinsic torsion.

Diego Conti; Thomas Bruun Madsen

2014-10-22T23:59:59.000Z

384

Gravitational lensing in metric theories of gravity  

E-Print Network [OSTI]

Gravitational lensing in metric theories of gravity is discussed. I introduce a generalized approximate metric element, inclusive of both post-post-Newtonian (ppN) contributions and gravito-magnetic field. Following Fermat's principle and standard hyphoteses, I derive the time delay function and deflection angle caused by an isolated mass distribution. Several astrophysical systems are considered. In most of the cases, the gravito-magnetic correction offers the best perspectives for an observational detection. Actual measurements distinguish only marginally different metric theories one from another.

M. Sereno

2003-01-15T23:59:59.000Z

385

Feasibility Studies on Disturbance Feedforward Techniques to Improve Wind Turbine Load Mitigation Performance: January 2009 -- January 2010  

SciTech Connect (OSTI)

This study investigates disturbance feedforward and preview control to better understand the best possible improvement in load mitigation using advanced wind measurement techniques.

Laks, J.H.; Dunne, F.; Pao, L. Y.

2010-12-01T23:59:59.000Z

386

Improved Hydrogen Storage Performance of MgH2-LiAlH4 Composite by Addition of MnFe2O4  

E-Print Network [OSTI]

/L) densities are extremely eager for on-board hydrogen storage in fuel cell vehicles according to the U.S. DOE great potential as a catalyst to promote MgH2- LiAlH4 system hydrogen storage performances. MotivatedImproved Hydrogen Storage Performance of MgH2-LiAlH4 Composite by Addition of MnFe2O4 Qi Wan, Ping

Volinsky, Alex A.

387

Practical Diagnostics for Evaluating Residential Commissioning Metrics  

SciTech Connect (OSTI)

In this report, we identify and describe 24 practical diagnostics that are ready now to evaluate residential commissioning metrics, and that we expect to include in the commissioning guide. Our discussion in the main body of this report is limited to existing diagnostics in areas of particular concern with significant interactions: envelope and HVAC systems. These areas include insulation quality, windows, airtightness, envelope moisture, fan and duct system airflows, duct leakage, cooling equipment charge, and combustion appliance backdrafting with spillage. Appendix C describes the 83 other diagnostics that we have examined in the course of this project, but that are not ready or are inappropriate for residential commissioning. Combined with Appendix B, Table 1 in the main body of the report summarizes the advantages and disadvantages of all 107 diagnostics. We first describe what residential commissioning is, its characteristic elements, and how one might structure its process. Our intent in this discussion is to formulate and clarify these issues, but is largely preliminary because such a practice does not yet exist. Subsequent sections of the report describe metrics one can use in residential commissioning, along with the consolidated set of 24 practical diagnostics that the building industry can use now to evaluate them. Where possible, we also discuss the accuracy and usability of diagnostics, based on recent laboratory work and field studies by LBNL staff and others in more than 100 houses. These studies concentrate on evaluating diagnostics in the following four areas: the DeltaQ duct leakage test, air-handler airflow tests, supply and return grille airflow tests, and refrigerant charge tests. Appendix A describes those efforts in detail. In addition, where possible, we identify the costs to purchase diagnostic equipment and the amount of time required to conduct the diagnostics. Table 1 summarizes these data. Individual equipment costs for the 24 practical diagnostics range from a few hundred dollars to many thousands of dollars. The higher costs are associated with infrared thermography and state-of-the-art automated diagnostic systems. Most tests can be performed in one hour or less, using equipment priced toward the lower end of the cost spectrum.

Wray, Craig; Walker, Iain; Siegel, Jeff; Sherman, Max

2002-06-11T23:59:59.000Z

388

Clean Cities Annual Metrics Report 2009 (Revised)  

SciTech Connect (OSTI)

Document provides Clean Cities coalition metrics about the use of alternative fuels; the deployment of alternative fuel vehicles, hybrid electric vehicles (HEVs), and idle reduction initiatives; fuel economy activities; and programs to reduce vehicle miles driven.

Johnson, C.

2011-08-01T23:59:59.000Z

389

Contributions to Metric Number Technical Report  

E-Print Network [OSTI]

Contributions to Metric Number Theory Paul Rowe Technical Report RHUL­MA­2002­2 5 December 2002, Professor Glyn Harman, for sug- gestions of problems to attempt, helpful advice on methods and help

Dent, Alexander W.

390

New Description of Self-Dual Metrics  

E-Print Network [OSTI]

We show that Pleba\\'nski's equation for self-dual metrics is equivalent to a pair of equations describing canonical transformations in 2-dimensional phase spaces. Examples of linearizations of these equations are given.

J. Tafel

2006-02-09T23:59:59.000Z

391

Microsoft Word - QER Resilience Metrics - Technical Workshp ...  

Energy Savers [EERE]

on developing a long-term roadmap on resilience metrics for electric power, gas, and oil infrastructure and their proposed uses. Location The session will be held on be held...

392

Technical Workshop: Resilience Metrics for Energy Transmission...  

Office of Environmental Management (EM)

NGOs to discuss the state of play of and need for resilience metrics and how they vary by natural gas, liquid fuels and electric grid infrastructures. Issues important to...

393

Geodesic completeness of diagonal $G_2$ metrics  

E-Print Network [OSTI]

In this talk a sufficient condition for a diagonal orthogonally transitive cylindrical $G_2$ metric to be geodesically complete is given. The condition is weak enough to comprise all known diagonal perfect fluid cosmological models that are non-singular.

L. Fernández-Jambrina

2009-04-10T23:59:59.000Z

394

One-Axis Trackers -- Improved Reliability, Durability, Performance, and Cost Reduction; Final Subcontract Technical Status Report, 2 May 2006 - 31 August 2007  

SciTech Connect (OSTI)

The overall objective of this subcontract is to reduce the total cost of electricity generated by single-axis tracking solar energy systems for utility and other large-scale commercial applications by improving performance and reliability and by reducing installation time, cost, and environmental impact.

Shingleton, J.

2008-02-01T23:59:59.000Z

395

Get Help for Free! Take advantage of these Stony Brook departments that offer trained staff with proven records to help YOU improve your academic performance!  

E-Print Network [OSTI]

Get Help for Free! Take advantage of these Stony Brook departments that offer trained staff with proven records to help YOU improve your academic performance! Services Courses Type of Help Location and Approximate Hours* AMS Help Room AMS 102, 151, 161, 201,210 Walk-in questions 010 Harriman, Mon-Fri 9AM­5PM

Ge, Qiaode Jeff

396

Improving Vortex Generators to Enhance the Performance of Air-Cooled Condensers in a Geothermal Power Plant  

SciTech Connect (OSTI)

This report summarizes work at the Idaho National Laboratory to develop strategies to enhance air-side heat transfer in geothermal air-cooled condensers such that it should not significantly increase pressure drop and parasitic fan pumping power. The work was sponsored by the U.S. Department of Energy, NEDO (New Energy and Industrial Technology Development Organization) of Japan, Yokohama National University, and the Indian Institute of Technology, Kanpur, India. A combined experimental and numerical investigation was performed to investigate heat transfer enhancement techniques that may be applicable to largescale air-cooled condensers such as those used in geothermal power applications. A transient heat transfer visualization and measurement technique was employed in order to obtain detailed distributions of local heat transfer coefficients on model fin surfaces. Pressure drop measurements were obtained for a variety of tube and winglet configurations using a single-channel flow apparatus that included four tube rows in a staggered array. Heat transfer and pressure drop measurements were also acquired in a separate multiple-tube row apparatus in the Single Blow Test Facility. In addition, a numerical modeling technique was developed to predict local and average heat transfer for these low-Reynolds number flows, with and without winglets. Representative experimental and numerical results were obtained that reveal quantitative details of local finsurface heat transfer in the vicinity of a circular tube with a single delta winglet pair downstream of the cylinder. Heat transfer and pressure-drop results were obtained for flow Reynolds numbers based on channel height and mean flow velocity ranging from 700 to 6500. The winglets were of triangular (delta) shape with a 1:2 or 1:3 height/length aspect ratio and a height equal to 90% of the channel height. Overall mean fin-surface heat transfer results indicate a significant level of heat transfer enhancement (in terms of Colburn j-factor) associated with deployment of the winglets with circular as well as oval tubes. In general, toe-in (common flow up) type winglets appear to have better performance than the toe-out (common flow down) type winglets. Comparisons of heat transfer and pressure drop results for the elliptical tube versus a circular tube with and without winglets are provided. During the course of their independent research, all of the researchers have established that about 10 to 30% enhancement in Colburn j-factor is expected. However, actual increase in heat transfer rate from a heat exchanger employing finned tubes with winglets may be smaller, perhaps on the order of 2 to 5%. It is also concluded that for any specific application, more full-size experimentation is needed to optimize the winglet design for a specific heat exchanger application. If in place of a circular tube, an oval tube can be economically used in a bundle, it is expected that the pressure drop across the tube bundle with the application of vortex generators (winglets) will be similar to that in a conventional circular tube bundle. It is hoped that the results of this research will demonstrate the benefits of applying vortex generators (winglets) on the fins to improve the heat transfer from the air-side of the tube bundle.

Manohar S. Sohal

2005-09-01T23:59:59.000Z

397

Dal-Tile: Optimized Compressed Air System Improves Performance and Saves Energy at a Tile Manufacturing Plant  

SciTech Connect (OSTI)

This DOE Industrial Technologies Program case study describes the significant energy and costs savings resulting from compressed air system improvements at Dal-Tile, a Texas tile manufacturing plant.

Not Available

2005-08-01T23:59:59.000Z

398

Product Concept Metrics: a Preliminary Study Working Paper  

E-Print Network [OSTI]

Metrics for product concept evaluation and screening is a relatively unstudied topic of product development.

Takala, Roope

399

IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 32, NO. 3, JUNE 2004 1267 Improvements in Depressed Collector Performance  

E-Print Network [OSTI]

Collector Performance by Modifications to Electrode Geometry Vis-a-Vis Trajectories of Backscattered, Life Fellow, IEEE Abstract--Backscattering of electrons in depressed collectors has a significant effect on the collector efficiency and other performance parameters. We have studied these phenomena

Valfells, Ágúst

400

Improved magnetoelectric performance of the Ni-P/Ni/Pb(Zr,TiO)3 cylindrical layered composites  

E-Print Network [OSTI]

) cylindrical layered magnetoelectric (ME) composites have been prepared by electroless deposition, and electroless deposition.9­12 Improving magnetoelectric device characteristics can be achieved by enhancing via magnetic flux concentration. Nickel is a kind of universal strong magnetic material, while Ni

Volinsky, Alex A.

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Enhancing the Benefit of the Chemical Mixture Methodology: A Report on Methodology Testing and Potential Approaches for Improving Performance  

SciTech Connect (OSTI)

Extensive testing shows that the current version of the Chemical Mixture Methodology (CMM) is meeting its intended mission to provide conservative estimates of the health effects from exposure to airborne chemical mixtures. However, the current version of the CMM could benefit from several enhancements that are designed to improve its application of Health Code Numbers (HCNs) and employ weighting factors to reduce over conservatism.

Yu, Xiao-Ying; Yao, Juan; He, Hua; Glantz, Clifford S.; Booth, Alexander E.

2012-01-01T23:59:59.000Z

402

Network protocol changes can improve DisCom WAN performance : evaluating TCP modifications and SCTP in the ASC tri-lab environment.  

SciTech Connect (OSTI)

The Advanced Simulation and Computing (ASC) Distance Computing (DisCom) Wide Area Network (WAN) is a high performance, long distance network environment that is based on the ubiquitous TCP/IP protocol set. However, the Transmission Control Protocol (TCP) and the algorithms that govern its operation were defined almost two decades ago for a network environment vastly different from the DisCom WAN. In this paper we explore and evaluate possible modifications to TCP that purport to improve TCP performance in environments like the DisCom WAN. We also examine a much newer protocol, SCTP (Stream Control Transmission Protocol) that claims to provide reliable network transport while also implementing multi-streaming, multi-homing capabilities that are appealing in the DisCom high performance network environment. We provide performance comparisons and recommendations for continued development that will lead to network communications protocol implementations capable of supporting the coming ASC Petaflop computing environments.

Tolendino, Lawrence F.; Hu, Tan Chang

2005-06-01T23:59:59.000Z

403

Evaluation of transient agility metrics through unmanned simulation of the X-31 post-stall aircraft  

E-Print Network [OSTI]

measure, the pitch impulse metric, is developed and simulated on the X-3 IA to describe an aircraft's balance of maximum load factor generation and maintenance during a pitch maneuver. High and low AOA lateral agility tests also show improved roll...

Fischer, Shiloh Douglas

1996-01-01T23:59:59.000Z

404

Comparison of noise-normalized minimum norm estimates for MEG analysis using multiple resolution metrics  

E-Print Network [OSTI]

LORETA inverse operators, on the metrics dipole localization error (DLE), spatial dispersion (SD) and overall, including individual noise covariance matrices and head geometries. We confirmed that for PSFs DLE improved procedures are used as "spatial filters." While low DLE is advantageous for the localization of a single

Henson, Rik

405

Method to improve reliability of a fuel cell system using low performance cell detection at low power operation  

DOE Patents [OSTI]

A system and method for detecting a low performing cell in a fuel cell stack using measured cell voltages. The method includes determining that the fuel cell stack is running, the stack coolant temperature is above a certain temperature and the stack current density is within a relatively low power range. The method further includes calculating the average cell voltage, and determining whether the difference between the average cell voltage and the minimum cell voltage is greater than a predetermined threshold. If the difference between the average cell voltage and the minimum cell voltage is greater than the predetermined threshold and the minimum cell voltage is less than another predetermined threshold, then the method increments a low performing cell timer. A ratio of the low performing cell timer and a system run timer is calculated to identify a low performing cell.

Choi, Tayoung; Ganapathy, Sriram; Jung, Jaehak; Savage, David R.; Lakshmanan, Balasubramanian; Vecasey, Pamela M.

2013-04-16T23:59:59.000Z

406

Innovative Characterization of Amorphous and Thin-Film Silicon for Improved Module Performance: 28 April 2005 - 15 September 2008  

SciTech Connect (OSTI)

This report focuses on (1) characterizing nc-Si:H from United Solar; (2) studying Si,Ge:H alloys deposited by HWCVD; and (3) characterizing CIGS films and relating to cell performance parameters.

Cohen, J. D.

2009-12-01T23:59:59.000Z

407

The potential role of new technology for enhanced safety and performance of nuclear power plants through improved service maintenance  

E-Print Network [OSTI]

Refinements in the safety and performance of nuclear power plants must be made to maintain public confidence and ensure competitiveness with other power sources. The aircraft industry, US Navy, and other programs have ...

Achorn, Ted Glen

1991-01-01T23:59:59.000Z

408

Microsoft PowerPoint - 6_JAMES_CRABTREE_Continous Improvement...  

National Nuclear Security Administration (NNSA)

* Prerequisite skill-set to develop specialized reports and analysis * Outreach and communication * Performance metrics and progress status tracking * Defined roles and...

409

Flowing Liquid Crystal Simulating the Schwarzschild Metric  

E-Print Network [OSTI]

We show how to simulate the equatorial section of the Schwarzschild metric through a flowing liquid crystal in its nematic phase. Inside a liquid crystal in the nematic phase, a traveling light ray feels an effective metric, whose properties are linked to perpendicular and parallel refractive indexes, $n_o$ e $n_e$ respectively, of the rod-like molecule of the liquid crystal. As these indexes depend on the scalar order parameter of the liquid crystal, the Beris-Edwards hydrodynamic theory is used to connect the order parameter with the velocity of a liquid crystal flow at each point. This way we calculate a radial velocity profile that simulates the equatorial section of the Schwarzschild metric, in the region outside of Schwarzschild's radius, in the nematic phase of the liquid crystal. In our model, the higher flow velocity can be of the order of some meters per second.

Erms R. Pereira; Fernando Moraes

2010-11-21T23:59:59.000Z

410

Design and Development of Performance Metrics for Elite Runners  

E-Print Network [OSTI]

Feature CPU Speed RAM Storage Battery Capacity Operatingstored locally. For storage and battery life purposes, theSensors CPU Battery Power Management Data Storage Wireless

Mittal, Nikhil R.

2012-01-01T23:59:59.000Z

411

Utilization of visual metrics to drive intended performance  

E-Print Network [OSTI]

In recent years the American industrial landscape has undergone tremendous change as companies have worked to adopt Lean practices. This transformation has been difficult, but necessary, as American companies work to remain ...

Wolbert, Daniel (Daniel Joseph)

2007-01-01T23:59:59.000Z

412

Meaningful Energy Efficiency Performance Metrics for the Process Industries  

E-Print Network [OSTI]

, BPST HP Steam LP Steam PROCESS WORK ESL-IE-09-05-19 Proceedings of the Thirty-First Industrial Energy Technology Conference, New Orleans, LA, May 12-15, 2009 Reforming, Hydro-treating, etc. Examples of process units in gas processing plants...

Kumana, J. D.; Sidhwa, N. R.

413

EM Corporate QA Performance Metrics | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in Review: TopEnergy DOEDealingVehicle1:Energy Independence & SecurityEMEnergy

414

Instructions for EM Corporate Performance Metrics | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomentheATLANTA,Fermi NationalBusiness PlanPostingOctober 13,Institutional

415

Performance Metrics and Budget Division (HC-51) | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNG |September 15, 2010Energy6 Frontera STAT.Paul L.3 Agency FinancialGuide to

416

New IEC Specifications Help Define Wind Plant Performance Reporting Metrics  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergy HealthCommentsAugustNationalMarkets with WindPrudentDataDepartment of|

417

Design and Development of Performance Metrics for Elite Runners  

E-Print Network [OSTI]

System Acceleration in Abduction Direction for Left Shoe inthe toes upwards) and Abduction (pointing the toes out to3.7 shows y-axis abduction data from the accelerometer. It

Mittal, Nikhil R.

2012-01-01T23:59:59.000Z

418

NASA Marshall Space Flight Center Improves Cooling System Performance: Best Management Practice Case Study #10: Cooling Towers (Fact Sheet)  

SciTech Connect (OSTI)

National Aeronautics and Space Administration's (NASA) Marshall Space Flight Center (MSFC) has a longstanding sustainability program that revolves around energy and water efficiency as well as environmental protection. MSFC identified a problematic cooling loop with six separate compressor heat exchangers and a history of poor efficiency. The facility engineering team at MSFC partnered with Flozone Services, Incorporated to implement a comprehensive water treatment platform to improve the overall efficiency of the system.

Not Available

2011-02-01T23:59:59.000Z

419

The French nuclear power plant reactor building containment contributions of prestressing and concrete performances in reliability improvements and cost savings  

SciTech Connect (OSTI)

The Electricite de France`s N4 CHOOZ B nuclear power plant, two units of the world`s largest PWR model (1450 Mwe each), has earned the Electric Power International`s 1997 Powerplant Award. This lead NPP for EDF`s N4 series has been improved notably in terms of civil works. The presentation will focus on the Reactor Building`s inner containment wall which is one of the main civil structures on a technical and safety point of view. In order to take into account the necessary evolution of the concrete technical specification such as compressive strength low creep and shrinkage, the HSC/HPC has been used on the last N4 Civaux 2 NPP. As a result of the use of this type of professional concrete, the containment withstands an higher internal pressure related to severe accident and ensures higher level of leak-tightness, thus improving the overall safety of the NPP. On that occasion, a new type of prestressing has been tested locally through 55 C 15 S tendons using a new C 1500 FE Jack. These updated civil works techniques shall allow EDF to ensure a Reactor Containment lifespan for more than 50 years. The gains in terms of reliability and cost saving of these improved techniques will be developed hereafter.

Rouelle, P.; Roy, F. [Electricite de France, Paris (France). Engineering and Construction Div.

1998-12-31T23:59:59.000Z

420

An assessment of BWR (boiling water reactor) Mark-II containment challenges, failure modes, and potential improvements in performance  

SciTech Connect (OSTI)

This report assesses challenges to BWR Mark II containment integrity that could potentially arise from severe accidents. Also assessed are some potential improvements that could prevent core damage or containment failure, or could mitigate the consequences of such failure by reducing the release of fission products to the environment. These challenges and improvements are analyzed via a limited quantitative risk/benefit analysis of a generic BWR/4 reactor with Mark II containment. Point estimate frequencies of the dominant core damage sequences are obtained and simple containment event trees are constructed to evaluate the response of the containment to these severe accident sequences. The resulting containment release modes are then binned into source term release categories, which provide inputs to the consequence analysis. The output of the consequences analysis is used to construct an overall base case risk profile. Potential improvements and sensitivities are evaluated by modifying the event tree spilt fractions, thus generating a revised risk profile. Several important sensitivity cases are examined to evaluate the impact of phenomenological uncertainties on the final results. 75 refs., 25 figs., 65 tabs.

Kelly, D.L.; Jones, K.R.; Dallman, R.J. (EG and G Idaho, Inc., Idaho Falls, ID (USA)); Wagner, K.C. (Science Applications International Corp., Albuquerque, NM (USA))

1990-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

A theory of metrics with maximal acceleration  

E-Print Network [OSTI]

We present a geometric theory for spacetimes whose world lines associated with physical particles have an upper bound for the proper acceleration. After some fundamental remarks on the requirements that classical dynamics for point particles must hold good, the notion of generalized metric and a theory of maximal acceleration are introduced. A perturbative approach to metrics of maximal acceleration is discussed. Then several of their physical and kinematical properties are investigated. These include a discussion of the fundamental causal theory concepts and the introduction of the associated notions of Euclidean length and celerity function. Finally, we discuss the corresponding modification of the Einstein's mass-energy relation.

Ricardo Gallego Torromé

2014-03-06T23:59:59.000Z

422

FY 2015 METRIC SUMMARY | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"ClickPipelinesProvedDecember 2005DepartmentDecember U.S. Department-5 METRIC SUMMARY FY 2015 METRIC

423

A microprocessor-based control to improve the high speed performance of a permanent magnet brushless motor  

E-Print Network [OSTI]

and speed 17 21 24 2. 12 Control strategy for fast speed response and rapid load variations . 25 2. 13 Current locus to maintain constant power 2. 14 Proposed control strategy 3. 1 Machine model of a three phase PM motor . 3. 2 Simulation topology... pulse width advance . Torque-current performance curves for 180 degrees pulse width advance . Torque-speed performance curves for 180 degrees pulse width retard 86 87 xn LIST OF FIGURES (Continued) Figure 6. 14 6. 15 6. 16 6. 17 6. 18 6...

Becerra, Roger Carlos

1986-01-01T23:59:59.000Z

424

Real-time performance monitoring and management system  

DOE Patents [OSTI]

A real-time performance monitoring system for monitoring an electric power grid. The electric power grid has a plurality of grid portions, each grid portion corresponding to one of a plurality of control areas. The real-time performance monitoring system includes a monitor computer for monitoring at least one of reliability metrics, generation metrics, transmission metrics, suppliers metrics, grid infrastructure security metrics, and markets metrics for the electric power grid. The data for metrics being monitored by the monitor computer are stored in a data base, and a visualization of the metrics is displayed on at least one display computer having a monitor. The at least one display computer in one said control area enables an operator to monitor the grid portion corresponding to a different said control area.

Budhraja, Vikram S. (Los Angeles, CA); Dyer, James D. (La Mirada, CA); Martinez Morales, Carlos A. (Upland, CA)

2007-06-19T23:59:59.000Z

425

A green synthesis of a layered titanate, potassium lithium titanate; lower temperature solid-state reaction and improved materials performance  

SciTech Connect (OSTI)

A layered titanate, potassium lithium titanate, with the size range from 0.1 to 30 µm was prepared to show the effects of the particle size on the materials performance. The potassium lithium titanate was prepared by solid-state reaction as reported previously, where the reaction temperature was varied. The reported temperature for the titanate preparation was higher than 800 °C, though 600 °C is good enough to obtain single-phase potassium lithium titanate. The lower temperature synthesis is cost effective and the product exhibit better performance as photocatalysts due to surface reactivity. - Graphical abstract: Finite particle of a layered titanate, potassium lithium titanate, was prepared by solid-state reaction at lower temperature to show modified materials performance. Display Omitted - Highlights: • Potassium lithium titanate was prepared by solid-state reaction. • Lower temperature reaction resulted in smaller sized particles of titanate. • 600 °C was good enough to obtain single phased potassium lithium titanate. • The product exhibited better performance as photocatalyst.

Ogawa, Makoto, E-mail: waseda.ogawa@gmail.com [Graduate School of Creative Science and Engineering, Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050 (Japan); Department of Earth Sciences, Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050 (Japan); Morita, Masashi, E-mail: m-masashi@y.akane.waseda.jp [Graduate School of Creative Science and Engineering, Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050 (Japan); Igarashi, Shota, E-mail: uxei_yoshi_yoshi@yahoo.co.jp [Graduate School of Creative Science and Engineering, Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050 (Japan); Sato, Soh, E-mail: rookie_so_sleepy@yahoo.co.jp [Graduate School of Creative Science and Engineering, Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169-8050 (Japan)

2013-10-15T23:59:59.000Z

426

Improvement of Power-Performance Efficiency for High-End Computing Rong Ge, Xizhou Feng, Kirk W. Cameron  

E-Print Network [OSTI]

of thousands of power hungry components will lead to intolerable operating costs and failure rates. High to quantify and compare the power-performance efficiency for parallel Fourier transform and matrix transpose numbers of power-hungry commercial components (e.g. Itanium) in clusters of SMPs to achieve high

Ge, Rong

427

Metrics for a Sustainable Produced By  

E-Print Network [OSTI]

Metrics for a Sustainable EcoVillage #12;2 Produced By: Nam Nguyen Master of Urban and Regional Project Manager Project for Pride in Living (PPL) Jeffrey Skrenes Housing Director Hawthorne Neighborhood Council Photo source: Unless otherwise noted, photos are provided by People for Pride in Living

Levinson, David M.

428

Development of electron reflection suppression materials for improved thermionic energy converter performance using thin film deposition techniques  

SciTech Connect (OSTI)

Nonideal electrode surfaces cause significant degree of electron reflection from collector during thermionic converter operation. The effect of the collector surface structure on the converter performance was assessed through the development of several electron reflection suppression materials using various thin film deposition techniques. The double-diode probe method was used to compare the J-V characteristics of converters with polished and modified collector surfaces for emitter temperature and cesium vapor pressure in the ranges of 900-2000 K and 0.02-1.5 torr, respectively. The coadsorption of cesium and oxygen with respective partial vapor pressures of {approx}1.27 torr and a few microtorrs reduced the emitter work function to a minimum value of 0.99 eV. It was found that the collector surfaces with matte black appearance such as platinum black, voided nickel from radio-frequency plasma sputtering, and etched electroless Ni-P with craterlike pore morphology exhibited much better performance compared with polished collector surface. For these thin films, the increase in the maximum output voltage was up to 2.0 eV. For optimum performance with minimum work function and maximum saturation emission current density, the emitter temperature was in the range of 1100-1500 K, depending on the collector surface structure. The use of these materials in cylindrical converter design and/or in combination with hybrid mode triode configuration holds great potential in low and medium scale power generators for commercial use.

Islam, Mohammad; Inal, Osman T.; Luke, James R. [Department of Materials and Metallurgical Engineering, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801 (United States); New Mexico Institute of Mining and Technology, Institute for Engineering Research and Applications (IERA) , 901 University Blvd. SE, Albuquerque, New Mexico 87106-4339 (United States)

2006-10-15T23:59:59.000Z

429

A Year of Radiation Measurements at the North Slope of Alaska Second Quarter 2009 ARM and Climate Change Prediction Program Metric Report  

SciTech Connect (OSTI)

In 2009, the Atmospheric Radiation Measurement (ARM) Program and the Climate Change Prediction Program (CCPP) have been asked to produce joint science metrics. For CCPP, the second quarter metrics are reported in Evaluation of Simulated Precipitation in CCSM3: Annual Cycle Performance Metrics at Watershed Scales. For ARM, the metrics will produce and make available new continuous time series of radiative fluxes based on one year of observations from Barrow, Alaska, during the International Polar Year and report on comparisons of observations with baseline simulations of the Community Climate System Model (CCSM).

S.A. McFarlane, Y. Shi, C.N. Long

2009-04-15T23:59:59.000Z

430

Metrics for Measuring ProgressToward Implementation of the Smart...  

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

Metrics for Measuring ProgressToward Implementation of the Smart Grid (June 2008) Metrics for Measuring ProgressToward Implementation of the Smart Grid (June 2008) Results of the...

431

Ideal Based Cyber Security Technical Metrics for Control Systems  

SciTech Connect (OSTI)

Much of the world's critical infrastructure is at risk from attack through electronic networks connected to control systems. Security metrics are important because they provide the basis for management decisions that affect the protection of the infrastructure. A cyber security technical metric is the security relevant output from an explicit mathematical model that makes use of objective measurements of a technical object. A specific set of technical security metrics are proposed for use by the operators of control systems. Our proposed metrics are based on seven security ideals associated with seven corresponding abstract dimensions of security. We have defined at least one metric for each of the seven ideals. Each metric is a measure of how nearly the associated ideal has been achieved. These seven ideals provide a useful structure for further metrics development. A case study shows how the proposed metrics can be applied to an operational control system.

W. F. Boyer; M. A. McQueen

2007-10-01T23:59:59.000Z

432

Competing complexity metrics and adults' production of complex sentences  

E-Print Network [OSTI]

The adequacy of 11 metrics for measuring linguistic complexity was evaluated by applying each metric to language samples obtained from 30 different adult speakers, aged 60-90 years. The analysis then determined how well ...

Kemper, Susan; Cheng, Hintat

1992-01-01T23:59:59.000Z

433

Fluorinated Phosphazene Co-solvents for Improved Thermal and Safety Performance in Lithium-Ion Battery Electrolytes  

SciTech Connect (OSTI)

The safety of lithium-ion batteries is coming under increased scrutiny as they are being adopted for large format applications especially in the vehicle transportation industry and for grid-scale energy storage. The primary short-comings of lithium-ion batteries are the flammability of the liquid electrolyte and sensitivity to high voltage and elevated temperatures. We have synthesized a series of non-flammable fluorinated phosphazene liquids and blended them with conventional carbonate solvents. While the use of these phosphazenes as standalone electrolytes is highly desirable, they simply do not satisfy all of the many requirements that must be met such as high LiPF6 solubility and low viscosity, thus we have used them as additives and co-solvents in blends with typical carbonates. The physical and electrochemical properties of the electrolyte blends were characterized, and then the blends were used to build 2032-type coin cells which were evaluated at constant current cycling rates from C/10 to C/1. We have evaluated the performance of the electrolytes by determining the conductivity, viscosity, flash point, vapor pressure, thermal stability, electrochemical window, cell cycling data, and the ability to form solid electrolyte interphase (SEI) films. This paper presents our results on a series of chemically similar fluorinated cyclic phosphazene trimers, the FM series, which has exhibited numerous beneficial effects on battery performance, lifetimes, and safety aspects.

Harry W. Rollins; Mason K. Harrup; Eric J. Dufek; David K. Jamison; Sergiy V. Sazhin; Kevin L. Gering; Dayna L. Daubaras

2014-10-01T23:59:59.000Z

434

Financial Metrics Data Collection Protocol, Version 1.0  

SciTech Connect (OSTI)

Brief description of data collection process and plan that will be used to collect financial metrics associated with sustainable design.

Fowler, Kimberly M.; Gorrissen, Willy J.; Wang, Na

2010-04-30T23:59:59.000Z

435

IMPROVEMENT OF WEAR COMPONENT'S PERFORMANCE BY UTILIZING ADVANCED MATERIALS AND NEW MANUFACTURING TECHNOLOGIES: CASTCON PROCESS FOR MINING APPLICATIONS  

SciTech Connect (OSTI)

Michigan Technological University, together with The Robbins Group, Advanced Ceramic Research, Advanced Ceramic Manufacturing, and Superior Rock Bits, evaluated a new process and a new material for producing drill bit inserts and disc cutters for the mining industry. Difficulties in the material preparation stage slowed the research initially. Prototype testing of the drill bit inserts showed that the new inserts did not perform up to the current state of the art. Due to difficulties in the prototype production of the disc cutters, the disc cutter was manufactured but not tested. Although much promising information was obtained as a result of this project, the objective of developing an effective means for producing rock drill bits and rock disc cutters that last longer, increase energy efficiency and penetration rate, and lower overall production cost was not met.

Xiaodi Huang; Richard Gertsch

2005-02-04T23:59:59.000Z

436

Basic Electropolishing Process Research and Development in Support of Improved Reliable Performance SRF Cavities for the Future Accelerator  

SciTech Connect (OSTI)

Future accelerators require unprecedented cavity performance, which is strongly influenced by interior surface nanosmoothness. Electropolishing is the technique of choice to be developed for high-field superconducting radiofrequency cavities. Electrochemical impedance spectroscopy (EIS) and related techniques point to the electropolishing mechanism of Nb in a sulfuric and hydrofluoric acid electrolyte of controlled by a compact surface salt film under F- diffusion-limited mass transport control. These and other findings are currently guiding a systematic characterization to form the basis for cavity process optimization, such as flowrate, electrolyte composition and temperature. This integrated analysis is expected to provide optimum EP parameter sets for a controlled, reproducible and uniform surface leveling for Nb SRF cavities.

H. Tian, C.E. Reece,M.J. Kelley

2009-05-01T23:59:59.000Z

437

Dynamic C-metrics in (Gauged) Supergravities  

E-Print Network [OSTI]

We construct an exact time-dependent charged dilaton C-metric in four-dimensional ${\\cal N}=4$ gauged supergravity. The scalar field drives the time evolution by transferring energy to the black holes, thereby causing their masses to increase and their acceleration to decrease. The values of the electric/magnetic and scalar charges determine three regions of potential time evolution. This solution holographically describes a strongly-coupled three-dimensional conformal field theory on the background of an evolving black hole. We also find new static charged dilaton C-metrics, which arise in four-dimensional Einstein-Maxwell-dilaton theories whose scalar potential can be expressed in terms of a superpotential.

H. Lu; Justin F. Vazquez-Poritz

2014-08-13T23:59:59.000Z

438

Complex geometry and pre-metric electromagnetism  

E-Print Network [OSTI]

The intimate link between complex geometry and the problem of the pre-metric formulation of electromagnetism is explored. In particular, the relationship between 3+1 decompositions of R4 and the decompositions of the vector space of bivectors over R4 into real and imaginary subspaces relative to a choice of complex structure is emphasized. The role of the various scalar products on the space of bivectors that are defined in terms of a volume element on R4 and a complex structure on the space of bivectors that makes it C-linear isomorphic to C3 is discussed in the context of formulation of a theory of electromagnetism in which the Lorentzian metric on spacetime follows as a consequence of the existence of electromagnetic waves, not a prior assumption.

D. H. Delphenich

2004-12-10T23:59:59.000Z

439

Metrics for measuring distances in configuration spaces  

SciTech Connect (OSTI)

In order to characterize molecular structures we introduce configurational fingerprint vectors which are counterparts of quantities used experimentally to identify structures. The Euclidean distance between the configurational fingerprint vectors satisfies the properties of a metric and can therefore safely be used to measure dissimilarities between configurations in the high dimensional configuration space. In particular we show that these metrics are a perfect and computationally cheap replacement for the root-mean-square distance (RMSD) when one has to decide whether two noise contaminated configurations are identical or not. We introduce a Monte Carlo approach to obtain the global minimum of the RMSD between configurations, which is obtained from a global minimization over all translations, rotations, and permutations of atomic indices.

Sadeghi, Ali, E-mail: ali.sadeghi@unibas.ch; Ghasemi, S. Alireza; Schaefer, Bastian; Mohr, Stephan; Goedecker, Stefan [Department of Physics, Universität Basel, Klingelbergstr. 82, 4056 Basel (Switzerland)] [Department of Physics, Universität Basel, Klingelbergstr. 82, 4056 Basel (Switzerland); Lill, Markus A. [Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907 (United States)] [Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907 (United States)

2013-11-14T23:59:59.000Z

440

Optical metrics and birefringence of anisotropic media  

E-Print Network [OSTI]

The material tensor of linear response in electrodynamics is constructed out of products of two symmetric second rank tensor fields which in the approximation of geometrical optics and for uniaxial symmetry reduce to "optical" metrics, describing the phenomenon of birefringence. This representation is interpreted in the context of an underlying internal geometrical structure according to which the symmetric tensor fields are vectorial elements of an associated two-dimensional space.

Alexander B. Balakin; Winfried Zimdahl

2005-04-12T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Smart Grid Status and Metrics Report  

SciTech Connect (OSTI)

To convey progress made in achieving the vision of a smart grid, this report uses a set of six characteristics derived from the National Energy Technology Laboratory Modern Grid Strategy. It measures 21 metrics to provide insight into the grid’s capacity to embody these characteristics. This report looks across a spectrum of smart grid concerns to measure the status of smart grid deployment and impacts.

Balducci, Patrick J.; Weimar, Mark R.; Kirkham, Harold

2014-07-01T23:59:59.000Z

442

Non-metric gravity: A status report  

E-Print Network [OSTI]

We review the status of a certain (infinite) class of four-dimensional generally covariant theories propagating two degrees of freedom that are formulated without any direct mention of the metric. General relativity itself (in its Plebanski formulation) belongs to the class, so these theories are examples of modified gravity. We summarize the current understanding of the nature of the modification, of the renormalizability properties of these theories, of their coupling to matter fields, and describe some of their physical properties.

Kirill Krasnov

2007-11-05T23:59:59.000Z

443

Metric perturbation theory of quantum dynamics  

E-Print Network [OSTI]

A theory of quantum dynamics based on a discrete structure underlying the space time manifold is developed for single particles. It is shown that at the micro domain the interaction of particles with the underlying discrete structure results in the quantum space time manifold. Regarding the resulting quantum space-time as perturbation from the Lorentz metric it is shown it is possible to discuss the dynamics of particles in the quantum domain.

Antony L Tambyrajah

2006-10-06T23:59:59.000Z

444

Hybrid structure of polyaniline/ZnO nanograss and its application in dye-sensitized solar cell with performance improvement  

SciTech Connect (OSTI)

Polyaniline (PANI) hybridized ZnO photoanode for dye-sensitized solar cell (DSSC) was primarily prepared via a two-step process which involved hydrothermal growth of ZnO nanograss on the fluorine-doped tin oxide (FTO) substrate and subsequently chemisorption of PANI on the surfaces of the ZnO nanorods. The PANI hybridized ZnO nanograss films were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectra (FT-IR), and the results indicated that there were chemical interactions between PANI and ZnO. Both pure ZnO nanograss and PANI hybridized ZnO nanograss were applied to DSSC. The results of photoelectrochemical measurement showed that the photocurrent density of PANI (100 mg/L) hybridized ZnO nanograss photoanode was significantly enhanced, and the overall light-conversion efficiency increased by 60%. The electrochemical impedance spectra (EIS) displayed that the electron densities in photoanodes of PANI hybridized ZnO nanograss were larger than that in pure ZnO nanograss. This is ascribed to more effective charge separation and faster interfacial charge transferring occurred in the hybrid photoanode. - Graphical abstract: Operational principle of the DSSC: the introduced hybridizing PANI layer performs effective charge separation and faster interfacial charge transferring. Highlights: Black-Right-Pointing-Pointer PANI/ZnO nanograss hybrid materials as photoanode in Dye-sensitized solar cell. Black-Right-Pointing-Pointer Photoelectric conversion efficiency after hybridization was enhanced by 60%. Black-Right-Pointing-Pointer PANI hybridizing ZnO nanograss induced a rapid charge separation.

Zhu Shibu; Wei Wei; Chen Xiangnan [Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031 (China); Jiang Man, E-mail: jiangman1021@163.com [Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031 (China); Zhou Zuowan, E-mail: zwzhou@at-c.net [Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031 (China)

2012-06-15T23:59:59.000Z

445

Thermal Performance Benchmarking (Presentation)  

SciTech Connect (OSTI)

This project will benchmark the thermal characteristics of automotive power electronics and electric motor thermal management systems. Recent vehicle systems will be benchmarked to establish baseline metrics, evaluate advantages and disadvantages of different thermal management systems, and identify areas of improvement to advance the state-of-the-art.

Moreno, G.

2014-11-01T23:59:59.000Z

446

Integrated approach towards the application of horizontal wells to improve waterflooding performance. Annual progress report, January 1, 1996--December 31, 1996  

SciTech Connect (OSTI)

This annual report describes the progress during the fourth year of the project on {open_quotes}Integrated Approach Towards the Application of Horizontal Wells to Improve Waterflooding Performance{close_quotes}. The project involves using an integrated approach to characterize the reservoir followed by proposing an appropriate reservoir management strategy to improve the field performance. In the first stage of the project, the type of data we integrated include cross borehole seismic surveys, geological interpretation based on the logs and the cores, and the engineering information. In contrast, during the second stage of the project, we intend to use only conventional data to construct the reservoir description. This report covers the results of the implementation from the first stage of the project. It also discusses the work accomplished so far for the second stage of the project. The production from the Self Unit (location of Stage 1) has sustained an increase of 30 bbls/day over a year with an additional increase anticipated with further implementation. We have collected available core, log and production data from Section 16 in the Berryhill Glenn Unit and have finished the geological description. Based on the geological description and the associated petrophysical properties, we have developed a new indexing procedure for identifying the areas with the most potential. We are also investigating an adjoining tract formerly operated by Chevron where successful miceller-polymer flood was conducted. This will help us in evaluating the reasons for the success of the flood. Armed with this information, we will conduct a detailed geostatistical and flow simulation study and recommend the best reservoir management plan to improve the recovery of the field.

Kelkar, M.; Liner, C.; Kerr, D.

1997-01-01T23:59:59.000Z

447

Portable and Transparent Message Compression in MPI Libraries to Improve the Performance and Scalability of Parallel Applications  

SciTech Connect (OSTI)

The goal of this project has been to develop a lossless compression algorithm for message-passing libraries that can accelerate HPC systems by reducing the communication time. Because both compression and decompression have to be performed in software in real time, the algorithm has to be extremely fast while still delivering a good compression ratio. During the first half of this project, they designed a new compression algorithm called FPC for scientific double-precision data, made the source code available on the web, and published two papers describing its operation, the first in the proceedings of the Data Compression Conference and the second in the IEEE Transactions on Computers. At comparable average compression ratios, this algorithm compresses and decompresses 10 to 100 times faster than BZIP2, DFCM, FSD, GZIP, and PLMI on the three architectures tested. With prediction tables that fit into the CPU's L1 data acache, FPC delivers a guaranteed throughput of six gigabits per second on a 1.6 GHz Itanium 2 system. The C source code and documentation of FPC are posted on-line and have already been downloaded hundreds of times. To evaluate FPC, they gathered 13 real-world scientific datasets from around the globe, including satellite data, crash-simulation data, and messages from HPC systems. Based on the large number of requests they received, they also made these datasets available to the community (with permission of the original sources). While FPC represents a great step forward, it soon became clear that its throughput was too slow for the emerging 10 gigabits per second networks. Hence, no speedup can be gained by including this algorithm in an MPI library. They therefore changed the aim of the second half of the project. Instead of implementing FPC in an MPI library, they refocused their efforts to develop a parallel compression algorithm to further boost the throughput. After all, all modern high-end microprocessors contain multiple CPUs on a single die and will undoubtedly contain even larger numbers of CPUs in the future. Hence, a compute node in a parallel system is likely to have multiple processors per interconnection link. Thus, they investigated how to best exploit multiple CPUs to compress and decompress data for a single link, i.e., they developed a parallel version of the FPC algorithm called pFPC. On a 4-core 3 GHz Xeon system, pFPC exceeds 10 gigabits per second both in compression and decompression throughput while still reaching a compression ratio of 18%, which is reasonable for their double-precision floating-point datasets. At half this throughput, it achieves a 41% compression ratio. Moreover, the algorithm scales well to four cores and promises even higher throughputs on larger machines. Additional results and a description of the pFPC algorithm have recently been published in the proceedings of the Data Compression Conference. The C source code of pFPC is also publicly available.

David Albonesi; Martin Burtscher

2009-04-17T23:59:59.000Z

448

Template-space metric for searches for gravitational waves from the inspiral, merger and ringdown of binary black holes  

E-Print Network [OSTI]

Searches for gravitational waves (GWs) from binary black holes using interferometric GW detectors require the construction of template banks for performing matched filtering while analyzing the data. Placement of templates over the parameter space of binaries, as well as coincidence tests of GW triggers from multiple detectors make use of the definition of a metric over the space of gravitational waveforms. Although recent searches have employed waveform templates coherently describing the inspiral, merger and ringdown (IMR) of the coalescence, the metric used in the template banks and coincidence tests was derived from post-Newtonian inspiral waveforms. In this paper, we compute the template-space metric of the IMR waveform family IMRPhenomB over the parameter space of masses and the effective spin parameter. We also propose a coordinate system, which is a modified version of post-Newtonian chirp time coordinates, in which the metric is slowly varying over the parameter space. The match function analytically...

Kalaghatgi, Chinmay; Arun, K G

2015-01-01T23:59:59.000Z

449

Evaluation Metrics Applied to Accident Tolerant Fuels  

SciTech Connect (OSTI)

The safe, reliable, and economic operation of the nation’s nuclear power reactor fleet has always been a top priority for the United States’ nuclear industry. Continual improvement of technology, including advanced materials and nuclear fuels, remains central to the industry’s success. Decades of research combined with continual operation have produced steady advancements in technology and have yielded an extensive base of data, experience, and knowledge on light water reactor (LWR) fuel performance under both normal and accident conditions. One of the current missions of the U.S. Department of Energy’s (DOE) Office of Nuclear Energy (NE) is to develop nuclear fuels and claddings with enhanced accident tolerance for use in the current fleet of commercial LWRs or in reactor concepts with design certifications (GEN-III+). Accident tolerance became a focus within advanced LWR research upon direction from Congress following the 2011 Great East Japan Earthquake, resulting tsunami, and subsequent damage to the Fukushima Daiichi nuclear power plant complex. The overall goal of ATF development is to identify alternative fuel system technologies to further enhance the safety, competitiveness and economics of commercial nuclear power. Enhanced accident tolerant fuels would endure loss of active cooling in the reactor core for a considerably longer period of time than the current fuel system while maintaining or improving performance during normal operations. The U.S. DOE is supporting multiple teams to investigate a number of technologies that may improve fuel system response and behavior in accident conditions, with team leadership provided by DOE national laboratories, universities, and the nuclear industry. Concepts under consideration offer both evolutionary and revolutionary changes to the current nuclear fuel system. Mature concepts will be tested in the Advanced Test Reactor at Idaho National Laboratory beginning in Summer 2014 with additional concepts being readied for insertion in fiscal year 2015. This paper provides a brief summary of the proposed evaluation process that would be used to evaluate and prioritize the candidate accident tolerant fuel concepts currently under development.

Shannon M. Bragg-Sitton; Jon Carmack; Frank Goldner

2014-10-01T23:59:59.000Z

450

Improved performance of HgCdTe infrared detector focal plane arrays by modulating light field based on photonic crystal structure  

SciTech Connect (OSTI)

An HgCdTe long-wavelength infrared focal plane array photodetector is proposed by modulating light distributions based on the photonic crystal. It is shown that a promising prospect of improving performance is better light harvest and dark current limitation. To optimize the photon field distributions of the HgCdTe-based photonic crystal structure, a numerical method is built by combining the finite-element modeling and the finite-difference time-domain simulation. The optical and electrical characteristics of designed HgCdTe mid-wavelength and long-wavelength photon-trapping infrared detector focal plane arrays are obtained numerically. The results indicate that the photon crystal structure, which is entirely compatible with the large infrared focal plane arrays, can significantly reduce the dark current without degrading the quantum efficiency compared to the regular mesa or planar structure.

Liang, Jian; Hu, Weida, E-mail: wdhu@mail.sitp.ac.cn; Ye, Zhenhua; Li, Zhifeng; Chen, Xiaoshuang, E-mail: xschen@mail.sitp.ac.cn; Lu, Wei [National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu Tian Road, Shanghai 200083 (China); Liao, Lei [Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072 (China)

2014-05-14T23:59:59.000Z

451

Global hyperbolicity for spacetimes with continuous metrics  

E-Print Network [OSTI]

We show that the definition of global hyperbolicity in terms of the compactness of the causal diamonds and non-total imprisonment can be extended to spacetimes with continuous metrics, while retaining all of the equivalences to other notions of global hyperbolicity. In fact, global hyperbolicity is equivalent to the compactness of the space of causal curves and to the existence of a Cauchy hypersurface. Furthermore, global hyperbolicity implies causal simplicity, stable causality and the existence of maximal curves connecting any two causally related points.

Clemens Sämann

2015-02-02T23:59:59.000Z

452

IMPROVING PERFORMANCE INTERVIEW: Steve Ferencie  

E-Print Network [OSTI]

or innovate their business model. MMS: Are there specific impacts on midsize organizations? SF aligned is the IT organization and IT resource allocation with the business strategy? Second, what and efficient IT structure that, again, allows the business to operate more efficiently but also react

453

Nanolubricants to Improve Chiller Performance  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F S i DOEToward aInnovationHydrogenNRGA C T SofNanolubricants to

454

IMPROVED MISCIBLE NITROGEN FLOOD PERFORMANCE UTILIZING ADVANCED RESERVOIR CHARACTERIZATION AND HORIZONTAL LATERALS IN A CLASS I RESERVOIR - EAST BINGER (MARCHAND) UNIT  

SciTech Connect (OSTI)

Work associated with Budget Period 1 of the East Binger (Marchand) Unit project is nearing completion. A major aspect of this project is accurate modeling of the performance of horizontal wells. Well EBU 37-3H, the first horizontal well drilled in the unit, was drilled in the second quarter of 2001. After much difficulty establishing economic production from the well, the well was hydraulically fractured in November 2001. Post-treatment production has been very encouraging and is significantly better than a vertical well drilled in a similar setting. International Reservoir Technologies, Inc. has completed the final history match of the pilot area reservoir simulation model, including tuning to the performance of the horizontal well. The model's predicted reservoir pressure gradient between injection and production wells accurately matches observed data from the field, a significant improvement from prior model predictions. The model's predicted gas injection profiles now also more accurately match field data. Work has begun toward evaluating the optimum development scenario with the pilot model. Initially, four scenarios will be evaluated--two involving all horizontal infill wells, one involving all vertical infill wells, and one involving a combination of vertical and horizontal infill wells. The model cases for these scenarios have been defined, and construction of them is underway.

Joe Sinner

2002-01-16T23:59:59.000Z

455

IMPROVED MISCIBLE NITROGEN FLOOD PERFORMANCE UTILIZING ADVANCED RESERVOIR CHARACTERIZATION AND HORIZONTAL LATERALS IN A CLASS I RESERVOIR -- EAST BINGER (MARCHAND) UNIT  

SciTech Connect (OSTI)

Budget Period 2 of the East Binger Unit (''EBU'') DOE Project has been. Recent activities included additional data gathering and project monitoring, plus initiation of work on an SPE paper on the modeling efforts of the project. Early production performance suggests horizontal wells do not provide sufficient additional production over vertical wells to justify their incremental cost. It will take more time to evaluate the impact of the horizontal wells on sweep and ultimate recovery, but it is unlikely that an improvement in recovery will be sufficient to make the overall economic value of horizontal wells greater than the economic value of vertical wells. Monitoring of overall performance of the pilot area continues. Overall response to the various projects continues to be very favorable. Injection into the pilot area has nearly doubled, while gas production and nitrogen content of produced gas have both decreased. Nitrogen recycle within the pilot area has dropped from 60% to 20%. Efforts to further disseminate knowledge gained through this project, by means of technical paper presentations to industry groups, are underway. Project monitoring and technology transfer will be focus areas of Budget Period 3.

Joe Sinner

2004-08-24T23:59:59.000Z

456

Defining a Standard Metric for Electricity Savings  

SciTech Connect (OSTI)

The growing investment by governments and electric utilities in energy efficiency programs highlights the need for simple tools to help assess and explain the size of the potential resource. One technique that is commonly used in this effort is to characterize electricity savings in terms of avoided power plants, because it is easier for people to visualize a power plant than it is to understand an abstraction such as billions of kilowatt-hours. Unfortunately, there is no standardization around the characteristics of such power plants. In this letter we define parameters for a standard avoided power plant that have physical meaning and intuitive plausibility, for use in back-of-the-envelope calculations. For the prototypical plant this article settles on a 500 MW existing coal plant operating at a 70percent capacity factor with 7percent T&D losses. Displacing such a plant for one year would save 3 billion kW h per year at the meter and reduce emissions by 3 million metric tons of CO2 per year. The proposed name for this metric is the Rosenfeld, in keeping with the tradition among scientists of naming units in honor of the person most responsible for the discovery and widespread adoption of the underlying scientific principle in question--Dr. Arthur H. Rosenfeld.

Brown, Marilyn; Akbari, Hashem; Blumstein, Carl; Koomey, Jonathan; Brown, Richard; Calwell, Chris; Carter, Sheryl; Cavanagh, Ralph; Chang, Audrey; Claridge, David; Craig, Paul; Diamond, Rick; Eto, Joseph H.; Fulkerson, William; Gadgil, Ashok; Geller, Howard; Goldemberg, Jose; Goldman, Chuck; Goldstein, David B.; Greenberg, Steve; Hafemeister, David; Harris, Jeff; Harvey, Hal; Heitz, Eric; Hirst, Eric; Hummel, Holmes; Kammen, Dan; Kelly, Henry; Laitner, Skip; Levine, Mark; Lovins, Amory; Masters, Gil; McMahon, James E.; Meier, Alan; Messenger, Michael; Millhone, John; Mills, Evan; Nadel, Steve; Nordman, Bruce; Price, Lynn; Romm, Joe; Ross, Marc; Rufo, Michael; Sathaye, Jayant; Schipper, Lee; Schneider, Stephen H; Sweeney, James L; Verdict, Malcolm; Vorsatz, Diana; Wang, Devra; Weinberg, Carl; Wilk, Richard; Wilson, John; Worrell, Ernst

2009-03-01T23:59:59.000Z

457

Spherically Symmetric, Metrically Static, Isolated Systems in Quasi-Metric Gravity  

E-Print Network [OSTI]

The gravitational field exterior respectively interior to a spherically symmetric, isolated body made of perfect fluid is examined within the quasi-metric framework (QMF). It is required that the gravitational field is "metrically static", meaning that it is static except for the effects of the global cosmic expansion on the spatial geometry. Dynamical equations for the gravitational field are set up and an exact solution is found for the exterior part. Besides, equations of motion applying to inertial test particles moving in the exterior gravitational field are set up. By construction the gravitational field of the system is not static with respect to the cosmic expansion. This means that the radius of the source increases and that distances between circular orbits of inertial test particles increase according to the Hubble law. Moreover it is shown that if this model of an expanding gravitational field is taken to represent the gravitational field of the Sun (or isolated planetary systems), this has no serious consequences for observational aspects of planetary motion. On the contrary some observational facts of the Earth-Moon system are naturally explained within the QMF. Finally the QMF predicts different secular increases for two different gravitational coupling parameters. But such secular changes are neither present in the Newtonian limit of the quasi-metric equations of motion nor in the Newtonian limit of the quasi-metric field equations valid inside metrically static sources. Thus standard interpretations of space experiments testing the secular variation of G are explicitly theory-dependent and do not apply to the QMF.

Dag Østvang

2014-05-09T23:59:59.000Z

458

Conceptual Framework for Developing Resilience Metrics for the...  

Office of Environmental Management (EM)

Conceptual Framework for Developing Resilience Metrics for the Electricity, Oil, and Gas Sectors in the United States (September 2014) Conceptual Framework for Developing...

459

Metric space formulation of quantum mechanical conservation laws  

E-Print Network [OSTI]

We show that conservation laws in quantum mechanics naturally lead to metric spaces for the set of related physical quantities. All such metric spaces have an "onion-shell" geometry. We demonstrate the power of this approach by considering many-body systems immersed in a magnetic field, with a finite ground state current. In the associated metric spaces we find regions of allowed and forbidden distances, a "band structure" in metric space directly arising from the conservation of the $z$ component of the angular momentum.

P. M. Sharp; I. D'Amico

2014-03-26T23:59:59.000Z

460

On isotropic metric of Schwarzschild solution of Einstein equation  

E-Print Network [OSTI]

The known static isotropic metric of Schwarzschild solution of Einstein equation cannot cover with the range of r<2MG, a new isotropic metric of Schwarzschild solution is obtained. The new isotropic metric has the characters: (1) It is dynamic and periodic. (2) It has infinite singularities of the spacetime. (3) It cannot cover with the range of 0metric.

T. Mei

2006-10-24T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Energy consumption metrics of MIT buildings  

E-Print Network [OSTI]

With world energy demand on the rise and greenhouse gas levels breaking new records each year, lowering energy consumption and improving energy efficiency has become vital. MIT, in a mission to help improve the global ...

Schmidt, Justin David

2010-01-01T23:59:59.000Z

462

Symplectic fusion rings and their metric  

E-Print Network [OSTI]

The fusion of fields in a rational conformal field theory gives rise to a ring structure which has a very particular form. All such rings studied so far were shown to arise from some potentials. In this paper the fusion rings of the WZW models based on the symplectic group are studied. It is shown that they indeed arise from potentials which are described. These potentials give rise to new massive perturbations of superconformal hermitian symmetric models. The metric of the perturbation is computed and is shown to be given by solutions of the sinh--gordon equation. The kink structure of the theories is described, and it is argued that these field theories are integrable. The $S$ matrices for the fusion theories are argued to be non--minimal extensions of the $G_k\\times G_1/ G_{k+1}$ $S$ matrices with the adjoint perturbation, in the case of $G=SU(N)$.

D. Gepner; A. Schwimmer

1992-04-08T23:59:59.000Z

463

Metrics correlation and analysis service (MCAS)  

SciTech Connect (OSTI)

The complexity of Grid workflow activities and their associated software stacks inevitably involves multiple organizations, ownership, and deployment domains. In this setting, important and common tasks such as the correlation and display of metrics and debugging information (fundamental ingredients of troubleshooting) are challenged by the informational entropy inherent to independently maintained and operated software components. Because such an information 'pond' is disorganized, it a difficult environment for business intelligence analysis i.e. troubleshooting, incident investigation and trend spotting. The mission of the MCAS project is to deliver a software solution to help with adaptation, retrieval, correlation, and display of workflow-driven data and of type-agnostic events, generated by disjoint middleware.

Baranovski, Andrew; Dykstra, Dave; Garzoglio, Gabriele; Hesselroth, Ted; Mhashilkar, Parag; Levshina, Tanya; /Fermilab

2009-05-01T23:59:59.000Z

464

Bi-metric Gravity and "Dark Matter"  

E-Print Network [OSTI]

We present a bi-metric theory of gravity containing a length scale of galactic size. For distances less than this scale the theory satisfies the standard tests of General Relativity. For distances greater than this scale the theory yields an effective gravitational constant much larger than the locally observed value of Newton's constant. The transition from one regime to the other through the galactic scale can explain the observed rotation curves of galaxies and hence the effects normally attributed to the presence of dark matter. Phenomena on an extragalactic scale such as galactic clusters and the expansion of the universe are controlled by the enhanced gravitational coupling. This provides an explanation of the missing matter normally invoked to account for the observed value of Hubble's constant in relation to observed matter.

I. T. Drummond

2000-08-18T23:59:59.000Z

465

Merging electromagnetism with space-time metric  

E-Print Network [OSTI]

In the present work, it is shown that the electromagnetism may be directly associated to the four-dimensional space-time geometry. The starting point is an analysis of the geodesic equation of general relativity where it is verified that it contains implicitly the effects of the Coulomb and the Lorentz forces. Consequently, some components of the metric tensor are identified with the components of the four-vector electromagnetic potential. Then, it is constructed a low-field equation for the electromagnetism in the same structure of the Einstein field equations for the gravitation, relating the curvature of space-time to sources of charge and current density. In this framework, all the Maxwell equations are implicit. A proof of consistency with the framework of quantum mechanics is shown.

C. A. Duarte

2014-03-10T23:59:59.000Z

466

Clean Cities 2013 Annual Metrics Report  

SciTech Connect (OSTI)

Each year, the U.S. Department of Energy asks its Clean Cities program coordinators to submit annual reports of their activities and accomplishments for the previous calendar year. Data and information are submitted via an online database that is maintained as part of the Alternative Fuels Data Center (AFDC) at the National Renewable Energy Laboratory (NREL). Coordinators submit a range of data that characterize the membership, funding, projects, and activities of their coalitions. They also submit data about sales of alternative fuels, deployment of alternative fuel vehicles (AFVs) and hybrid electric vehicles (HEVs), idle-reduction (IR) initiatives, fuel economy activities, and programs to reduce vehicle miles traveled (VMT). NREL analyzes the data and translates them into petroleum-use reduction impacts, which are summarized in this 2013 Annual Metrics Report.

Johnson, C.; Singer, M.

2014-10-01T23:59:59.000Z

467

Optimal realizations of generic 5-point metrics Jack Koolen  

E-Print Network [OSTI]

.moulton@cmp.uea.ac.uk FAX: +44 1603 593345 5 October, 2007 1 #12;Abstract Given a metric d on a finite set X, a realization classes [12]. An explicit description of Type I,II and III metrics is presented in Section 2. Now, suppose

468

Metrics for Evaluating Conventional and Renewable Energy Technologies (Presentation)  

SciTech Connect (OSTI)

With numerous options for the future of natural gas, how do we know we're going down the right path? How do we designate a metric to measure and demonstrate change and progress, and how does that metric incorporate all stakeholders and scenarios?

Mann, M. K.

2013-01-01T23:59:59.000Z

469

Distance Metric Learning for Large Margin Nearest Neighbor Classification  

E-Print Network [OSTI]

Distance Metric Learning for Large Margin Nearest Neighbor Classification Kilian Q. Weinberger}@cis.upenn.edu Abstract We show how to learn a Mahanalobis distance metric for k-nearest neigh- bor (kNN) classification in kNN classification--for example, achieving a test error rate of 1.3% on the MNIST handwritten digits

Weinberger, Kilian

470

Performance characterization of an internsity-modulated fiber optic displacement sensor  

SciTech Connect (OSTI)

A testbed simulating an intensity-modulated fiber optic displacement sensor is experimentally characterized, and the implications regarding sensor design are discussed. Of interest are the intensity distribution of the transmitted optical signal and the relationships between sensor architecture and performance. Particularly, an intensity-modulated sensor's sensitivity, linearity, displacement range, and resolution are functions of the relative positioning of its transmitting and receiving fibers. In this paper, sensor architectures with various combinations of these performance metrics are discussed. A sensor capable of micrometer resolution is reported, and it is concluded that this work could lead to an improved methodology for sensor design.

Moro, Erik Allan [Los Alamos National Laboratory; Todd, Michael D [Los Alamos National Laboratory; Puckett, Santhony D [Los Alamos National Laboratory

2010-09-30T23:59:59.000Z

471

Improved Thermoelectric Performance of p-type Skutterudite YbxFe4-yPtySb12 (0.8 x 1, y = 1 and 0.5)  

SciTech Connect (OSTI)

Thermoelectric performance of p-type skutterudites currently lags that of the corresponding n-type materials and improvement of this important class of materials have become the focus of considerable research effort world-wide. Recent calculations find promising band structural features in p-type skutterudite materials of the type AeFe3NiSb12 ( Ae = Ca, Sr, or Ba) which could potentially lead to excellent thermoelectric properties. Recent work on the Yb- filled analog of the these formulations (YbFe3NiSb12) however finds that the onset of intrinsic conduction at lower than expected temperatures deteriorates the performance above 500 K leading to poor performance in the temperature range of interest for automotive waste heat recovery applications. We therefore seek a way to increase the band gap in order to find a way to minimize the deleterious effects of intrinsic conduction. Here we present ab initio band structure calculations and the synthesis and thermoelectric properties of YbxFe4-yPtySb12 (0.8 x 1, y = 1 and 0.5). Ab initio calculations find that the band gap increases for YbFe3PtSb12 as compared to the Ni-containing analog, though no such increase in the band gap energy was found for as compared to YbFe3.5Ni0.5Sb12. The y = 1 samples shows a characteristic transition to intrinsic conduction with a decrease in the Seebeck coefficient at temperatures above 700 K. The increased carrier concentration in y = 0.5 virtually eliminates any evidence of intrinsic conduction and the Seebeck coefficients for these samples increase monotonically up to 750 K, resulting in power factors approaching 27 W/cm K2 at 750 K. These power factors combined with low thermal conductivity result in a ZT = 0.9 at 750 K for Yb0.95Fe3.5Pt0.5Sb12.

Cho, Jung Y [GM R& D and Planning, Warren, Michigan; Ye, Zuxin [GM Research and Development Center; Tessema, Misle [GM Research and Development Center; Salvador, James R. [GM R& D and Planning, Warren, Michigan; Waldo, Richard [GM R& D and Planning, Warren, Michigan; Yang, Jiong [Chinese Academy of Sciences; Zhang, Weiqing [Chinese Academy of Sciences; Yang, Jihui [University of Washington; Cai, Wei [ORNL; Wang, Hsin [ORNL

2013-01-01T23:59:59.000Z

472

Regular Black Hole Metric with Three Constants of Motion  

E-Print Network [OSTI]

According to the no-hair theorem, astrophysical black holes are uniquely characterized by their masses and spins and are described by the Kerr metric. Several parametric spacetimes which deviate from the Kerr metric have been proposed in order to test this theorem with observations of black holes in both the electromagnetic and gravitational-wave spectra. Such metrics often contain naked singularities or closed timelike curves in the vicinity of the compact objects that can limit the applicability of the metrics to compact objects that do not spin rapidly, and generally admit only two constants of motion. The existence of a third constant, however, can facilitate the calculation of observables, because the equations of motion can be written in first-order form. In this paper, I design a Kerr-like black hole metric which is regular everywhere outside of the event horizon, possesses three independent constants of motion, and depends nonlinearly on four free functions that parameterize potential deviations from ...

Johannsen, Tim

2015-01-01T23:59:59.000Z

473

EECBG SEP Attachment 1 - Process metric list  

Energy Savers [EERE]

Number of new and existing buildings covered by new code 5. Clean Energy Policy 5a. Alternative energy plans developed or improved Number of alternative energy plans...

474

Computational Science Technical Note CSTN-119 Betweenness Centrality Metrics for Assessing Electrical Power Network  

E-Print Network [OSTI]

0 Computational Science Technical Note CSTN-119 Betweenness Centrality Metrics for Assessing. Hawick}, title = {Betweenness Centrality Metrics for Assessing Electrical Power Network Robustness Metrics for Assessing Electrical Power Network Robustness against Fragmentation and Node Failure K

Hawick, Ken

475

METRIC: Tracking Down Inefficiencies in the Memory Hierarchy via Binary Rewriting Jaydeep Marathe 1 , Frank Mueller 1 , Tushar Mohan 2 ,  

E-Print Network [OSTI]

Raleigh, NC 27695­7534 Salt Lake City, UT 84112 Ithaca, NY 14853 L­561, Livermore, CA 94551 mueller inefficiencies by examining data traces. METRIC is designed to alter the performance be­ havior of applications in this paper. First, we present meth­ ods to extract partial data traces from running applications by observing

Mueller, Frank

476

Dynamically Quantifying and Improving the Reliability of Distributed Storage Systems  

E-Print Network [OSTI]

Dynamically Quantifying and Improving the Reliability of Distributed Storage Systems Rekha Bachwani-scale storage systems can be significantly improved by using bet- ter reliability metrics and more efficient on a distributed storage system based on erasure codes. We find that MinI improves relia- bility significantly

Bianchini, Ricardo

477

Metrication of ASME Pressure Technology Codes and Standards: Status report  

SciTech Connect (OSTI)

There is not universal agreement on metrication. Most agree that it is necessary--sometime, maybe for the next generation, but not now; some agree that it is eventually necessary, and even desirable, but that it is too early; some believe that it is too late, already. Currently, for many pressure technology code users, metrication is neither needed nor wanted; for some, the opposite is true. However, Society leadership indicates that such may not hold for the future, and it is unlikely that the rest of the world will decide to convert to the inch-pound system. Therefore, it seems logical to at least begin the metrication process, which will take years to complete. The first step is accomplished by providing a dual system for reference and familiarity, using the soft side of hard conversion. This leaves the inch-pound system essentially intact, while affording the opportunity for limited use of metric standards and time for true metric sizes and products to become part of PTCS. The eventual goal, is not being metric for the sake of being metric, but to be globally consistent for economic reasons, and to facilitate the movement towards a smaller number of standard sizes worldwide.

Hollinger, G.L. [Babcock and Wilcox, Barberton, OH (United States). Research and Development Div.

1996-12-01T23:59:59.000Z

478

Performance-based assessment of daylight on tropical buildings- a case Study  

E-Print Network [OSTI]

81% 81% 95% 96% 74% 68% Daylight autonomy max (DAmax) >5%32% 28% 11% 9% 11% 6% Useful daylight illuminance (UDI) Daylight Performance Metrics for

Szu Cheng, CHIEN

2013-01-01T23:59:59.000Z

479

Momentum space metric, non-local operator, and topological insulators  

E-Print Network [OSTI]

Momentum space of a gapped quantum system is a metric space: it admits a notion of distance reflecting properties of its quantum ground state. By using this quantum metric, we investigate geometric properties of momentum space. In particular, we introduce a non-local operator which represents distance square in real space and show that this corresponds to the Laplacian in curved momentum space, and also derive its path integral representation in momentum space. The quantum metric itself measures the second cumulant of the position operator in real space, much like the Berry gauge potential measures the first cumulant or the electric polarization in real space. By using the non-local operator and the metric, we study some aspects of topological phases such as topological invariants, the cumulants and topological phase transitions. The effect of interactions to the momentum space geometry is also discussed.

Shunji Matsuura; Shinsei Ryu

2010-07-13T23:59:59.000Z

480

Analyses Of Two End-User Software Vulnerability Exposure Metrics  

SciTech Connect (OSTI)

The risk due to software vulnerabilities will not be completely resolved in the near future. Instead, putting reliable vulnerability measures into the hands of end-users so that informed decisions can be made regarding the relative security exposure incurred by choosing one software package over another is of importance. To that end, we propose two new security metrics, average active vulnerabilities (AAV) and vulnerability free days (VFD). These metrics capture both the speed with which new vulnerabilities are reported to vendors and the rate at which software vendors fix them. We then examine how the metrics are computed using currently available datasets and demonstrate their estimation in a simulation experiment using four different browsers as a case study. Finally, we discuss how the metrics may be used by the various stakeholders of software and to software usage decisions.

Jason L. Wright; Miles McQueen; Lawrence Wellman

2012-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "improvement performance metrics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


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