National Library of Energy BETA

Sample records for time based rate

  1. Tips: Time-Based Electricity Rates | Department of Energy

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

    Tips: Time-Based Electricity Rates Tips: Time-Based Electricity Rates July 27, 2014 - 8:09pm Addthis Time-based electricity programs encourage you to use energy when the demand is...

  2. Optimization of time-based rates in forward energy markets

    E-Print Network [OSTI]

    Wang, J.

    This paper presents a new two-step design approach of Time-Based Rate (TBR) programs for markets with a high penetration of variable energy sources such as wind power. First, an optimal market time horizon must be determined ...

  3. Tips: Time-Based Electricity Rates | Department of Energy

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

    Time-based electricity programs encourage you to use energy when the demand is low by giving you a lower price for electricity during those times. Time-based electricity programs...

  4. A New Series of Rate Decline Relations Based on the Diagnosis of Rate-Time Data 

    E-Print Network [OSTI]

    Boulis, Anastasios

    2010-01-14

    point for their derivation is given by the definitions of the "loss ratio" and the "derivative of the loss ratio", where the "loss ratio" is the ratio of rate data to derivative of rate data, and the "derivative of the loss ratio" is the "b...

  5. A biophysically-based neuromorphic model of spike rate- and timing-dependent plasticity

    E-Print Network [OSTI]

    Rachmuth, Guy

    Current advances in neuromorphic engineering have made it possible to emulate complex neuronal ion channel and intracellular ionic dynamics in real time using highly compact and power-efficient complementary metal-oxide- ...

  6. Local Recurrence in Women With Stage I Breast Cancer: Declining Rates Over Time in a Large, Population-Based Cohort

    SciTech Connect (OSTI)

    Canavan, Joycelin; Truong, Pauline T.; Smith, Sally L.; Lu, Linghong; Lesperance, Mary; Olivotto, Ivo A.

    2014-01-01

    Purpose: To evaluate whether local recurrence (LR) risk has changed over time among women with stage I breast cancer treated with breast-conserving therapy. Methods and Materials: Subjects were 5974 women aged ?50 years diagnosis with pT1N0 breast cancer from 1989 to 2006, treated with breast-conserving surgery and radiation therapy. Clinicopathologic characteristics, treatment, and LR outcomes were compared among 4 cohorts stratified by year of diagnosis: 1989 to 1993 (n=1077), 1994 to 1998 (n=1633), 1999 to 2002 (n=1622), and 2003 to 2006 (n=1642). Multivariable analysis was performed, with year of diagnosis as a continuous variable. Results: Median follow-up time was 8.6 years. Among patients diagnosed in 1989 to 1993, 1994 to 1998, 1999 to 2002, and 2003 to 2006, the proportions of grade 1 tumors increased (16% vs 29% vs 40% vs 39%, respectively, P<.001). Surgical margin clearance rates increased from 82% to 93% to 95% and 88%, respectively (P<.001). Over time, the proportions of unknown estrogen receptor (ER) status decreased (29% vs 10% vs 1.2% vs 0.5%, respectively, P<.001), whereas ER-positive tumors increased (56% vs 77% vs 86% vs 86%, respectively, P<.001). Hormone therapy use increased (23% vs 23% vs 62% vs 73%, respectively, P<.001), and chemotherapy use increased (2% vs 5% vs 10% vs 13%, respectively, P<.001). The 5-year cumulative incidence rates of LR over the 4 time periods were 2.8% vs 1.7% vs 0.9% vs 0.8%, respectively (Gray's test, P<.001). On competing risk multivariable analysis, year of diagnosis was significantly associated with decreased LR (hazard ratio, 0.92 per year, P=.0003). Relative to grade 1 histology, grades 2, 3, and unknown were associated with increased LR. Hormone therapy use was associated with reduced LR. Conclusion: Significant changes in the multimodality management of stage I breast cancer have occurred over the past 2 decades. More favorable-risk tumors were diagnosed, and margin clearance and systemic therapy use increased. These changes contributed to the observed declining LR rates among patients treated with breast-conserving therapy.

  7. Utility-Based Wireless Resource Allocation for Variable Rate Transmission

    E-Print Network [OSTI]

    Zhang, Xiaolu; Ng, Chun Sum

    2007-01-01

    For most wireless services with variable rate transmission, both average rate and rate oscillation are important performance metrics. The traditional performance criterion, utility of average transmission rate, boosts the average rate but also results in high rate oscillations. We introduce a utility function of instantaneous transmission rates. It is capable of facilitating the resource allocation with flexible combinations of average rate and rate oscillation. Based on the new utility, we consider the time and power allocation in a time-shared wireless network. Two adaptation policies are developed, namely, time sharing (TS) and joint time sharing and power control (JTPC). An extension to quantized time sharing with limited channel feedback (QTSL) for practical systems is also discussed. Simulation results show that by controlling the concavity of the utility function, a tradeoff between the average rate and rate oscillation can be easily made.

  8. Initial Studies Toward Real-Time Transmission Path Rating

    SciTech Connect (OSTI)

    Singh, Ruchi; Diao, Ruisheng; Cai, Niannian; Huang, Zhenyu; Tuck, Brian; Guo, Xinxin

    2012-07-26

    Demand continues to increase while transmission line construction is being constrained by multiple factors— economic, environmental, and political. Effective and efficient utilization of transmission lines is thus of great importance in an open access environment. Large blocks of power are transferred from areas with inexpensive generation to heavy load demand areas or areas with high generation costs. This results in some transmission paths being loaded closer to their path ratings, which limits further power transfer between areas. Traditionally, rating of important paths was determined off line by assuming the worst-case study scenario; once determined, it could be used for years. With increasing uncertainty arising from rapid growth of renewable energy and smart technologies, path rating studies are needed in near-real time to account for the latest system status and support a reliable and economic power grid. This paper adopts a simplified procedure based on standards of the North American Electric Reliability Corporation (NERC) to determine total transfer capability (TTC) or transfer limit for the purpose of demonstrating the benefits and necessity of real-time path rating. Initial studies are conducted to compute TTC of a two-area test system and a 39-bus test system. Results indicate that path rating can be significantly affected by loading conditions, generator schedules, system topology and other factors.

  9. Energy Productivity Via Time-of-Day Rates 

    E-Print Network [OSTI]

    Michael, R. S.

    1984-01-01

    Prompted by a combination of PURPA and a national concern about electricity price and supply, many utilities now have in place industrial time-of-day electric rates. When properly designed, these rates present an opportunity for energy...

  10. The impact of lead time on truckload transportation rates

    E-Print Network [OSTI]

    Caldwell, Erik R. (Erik Russell)

    2008-01-01

    The objective of this thesis was to analyze truckload shipment transactions in order to determine if rates are impacted by tender lead time, which is the amount of time between when a carrier is offered a load to when the ...

  11. Statistical testing and estimation in continuous time interest rate models 

    E-Print Network [OSTI]

    Kim, Myung Suk

    2006-10-30

    The shape of drift function in continuous time interest rate models has been investigated by many authors during the past decade. The main concerns have been whether the drift function is linear or nonlinear, but no convincing conclusions have been...

  12. Dead-time compensation for a logarithmic display rate meter

    DOE Patents [OSTI]

    Larson, J.A.; Krueger, F.P.

    1987-10-05

    An improved circuit is provided for application to a radiation survey meter that uses a detector that is subject to dead time. The circuit compensates for dead time over a wide range of count rates by producing a dead-time pulse for each detected event, a live-time pulse that spans the interval between dead-time pulses, and circuits that average the value of these pulses over time. The logarithm of each of these values is obtained and the logarithms are subtracted to provide a signal that is proportional to a count rate that is corrected for the effects of dead time. The circuit produces a meter indication and is also capable of producing an audible indication of detected events. 5 figs.

  13. Rate Sheet Essential in Long and Short Time Farm Loans. 

    E-Print Network [OSTI]

    Bennett, R. L.; Paris, M. S.

    1916-01-01

    and a rate sheet designed by the writer, published by the Extension Service of the Texas A. and M. College may be had on application. Detailed incomes of safe and unsafe farming are exhibited. The Texas Bankers Association under its former president, Joe... Hirsch, began actively urging the use of the crop credit statement shown in this bulletin in making loans to farmers. Credit based on this state- ment attached to farmers' notes, showing safe farming, whether offered by merchants or by banks, should...

  14. DIFFERENTIAL BASE RATE TRAINING INFLUENCES DETECTION OF NOVEL TARGETS IN A COMPLEX VISUAL INSPECTION TASK

    E-Print Network [OSTI]

    Spirtes, Peter

    effects on response times. These results have implications for improving training modules for individualsDIFFERENTIAL BASE RATE TRAINING INFLUENCES DETECTION OF NOVEL TARGETS IN A COMPLEX VISUAL presented with three base rates during the acquisition (training) phase: 100%, 50%, or 20%; at transfer, all

  15. GSEAS Graduation and Time to Degree Rates Electrical and Computer Engineering, 2008

    E-Print Network [OSTI]

    GSEAS Graduation and Time to Degree Rates Electrical and Computer Engineering, 2008 Rate Graduation and Time to Degree Rates Electrical and Computer Engineering, 2008 PhD Rate # of Students 3 # of Students 331 # of Graduates 257 77.6% Avg Time to Degree 24.3 590 Rate # of Students 38 # of Graduates 33

  16. GSEAS Graduation and Time to Degree Rates Electrical and Computer Engineering, 2010

    E-Print Network [OSTI]

    GSEAS Graduation and Time to Degree Rates Electrical and Computer Engineering, 2010 Rate Graduation and Time to Degree Rates Electrical and Computer Engineering, 2010 PhD Rate # of Graduates # of Graduates 292 # of Students 445 65.6% Avg Time to Degree 22.5 590 Rate # of Graduates 23 # of Students 31 74

  17. Cost Bases for Incentive Rates Applicable to Industrial Loads 

    E-Print Network [OSTI]

    Stover, C. N.

    1987-01-01

    ; they involve a depressed economy base in all or certain segments of the service area, a decrease in load, excess generation capacity, and an increase in base rates. An increase in rates may also be related to the commercial operation of a base load unit, i... utility has completely abandoned a pricing structure that is in any way related to cost. Some of the incentive rates are very short lived and reflect transient economic conditions while others tend to reflect long-term economic relationships...

  18. Scalar dissipation rate based flamelet modelling of turbulent premixed flames

    E-Print Network [OSTI]

    Kolla, Hemanth

    2010-03-16

    of species formation rates in the flame zone are required while from the point of view of thermo--acoustics the prediction of spatial variation of heat release rate is crucial; both tasks are challenging but imperative in CFD based design of combustion...

  19. A Comparison of Real-Time Thermal Rating Systems in the U.S. and the U.K.

    SciTech Connect (OSTI)

    Jake P. Gentle; Kurt S. Myers; Jason W. Bush; Isaac J. West; David M. Greenwood; Grant L. Ingram; Peter J. Davison; Matthias C.M. Troffaes

    2014-08-01

    Real-time thermal rating is a smart-grid technology that allows the rating of electrical conductors to be increased based on local weather conditions. Overhead lines are conventionally given a conservative, constant seasonal rating based on seasonal and regional worst case scenarios rather than actual, say, local hourly weather predictions. This paper provides a report of two pioneering schemes-one in the U.S. and one in the U.K.-where real-time thermal ratings have been applied. Thereby, we demonstrate that observing the local weather conditions in real time leads to additional capacity and safer operation. Second, we critically compare both approaches and discuss their limitations. In doing so, we arrive at novel insights which will inform and improve future real-time thermal rating projects.

  20. Analytical models of soil and litter decomposition: Solutions for mass loss and time-dependent decay rates

    E-Print Network [OSTI]

    Jackson, Robert B.

    decomposition data with process-based biogeochemical models is essential to quantify the turnover of organic to model multiple cohort decomposition, unifying both types of experimental data in one theory. Based models with a single time-dependent decay rate, and two models based on a continuous distribution

  1. TIME DELAY ESTIMATION IN A REVERBERANT ENVIRONMENT BY LOW RATE SAMPLING OF IMPULSIVE ACOUSTIC SOURCES

    E-Print Network [OSTI]

    Al-Naffouri, Tareq Y.

    ) is utilized for its estimation from the low rate sampled received signal. The arrival time of the di- rectTIME DELAY ESTIMATION IN A REVERBERANT ENVIRONMENT BY LOW RATE SAMPLING OF IMPULSIVE ACOUSTIC}@kfupm.edu.sa ABSTRACT This paper presents a new method of time delay estimation (TDE) using low sample rates

  2. Tiered time-of-use rates | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EISTJThin Film Solar Technologies JumpTiSol Jump to:Tiered time-of-use

  3. RATES

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

    and PACI Final FRN for Rate Order No. WAPA-139 - Notice of Order Temporarily Extending Formula Rates for Power, Transmission and Ancillary Services (PDF - 49K) Final FRN for Rate...

  4. RATES

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

    - 392K) Final FRN for Rate Order No. WAPA-139 - Notice of Order Temporarily Extending Formula Rates for Power, Transmission and Ancillary Services (PDF - 49K) Final FRN for Rate...

  5. The breakthrough time and permeation rate of three organic chemicals for selected glove combinations 

    E-Print Network [OSTI]

    Binion, Pete Edwin

    1992-01-01

    rates and breakthrough times were determined for the five different glove combinations versus three test chemicals using the Miran-lA infrared analyzer in a closed loop system. The polymers tested were natural rubber (NR), polyvinyl chloride (PVC... time and permeation rate when tested against three different challenge chemicals. PVC gloves with nitrile liners appeared to provide the most protection time against breakthrough for all three chemicals. The PVC gloves showed excellent resistance...

  6. Tips: Time-Based Electricity Rates | 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMayBuildingTheEasements30, 2008: US portionHeat

  7. Tips: Time-Based Electricity Rates | 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: Alternative FuelsofProgram: Report1538-1950 Timeline of Events:Smart Meters and a Smarter

  8. Towards More Transmission Asset Utilization through Real-time Path Rating

    SciTech Connect (OSTI)

    Diao, Ruisheng; Huang, Zhenyu; Jin, Chunlian; Vyakaranam, Bharat GNVSR; Jin, Shuangshuang; Makarov, Yuri V.

    2013-10-21

    Ratings of transmission paths, typically determined in an offline environment, are static and tend to be conservative, leading to underutilization of transmission assets, higher costs of system operation and renewable energy integration, and lower efficiency and savings. With the ever-increasing transmission congestion costs and new challenges from renewable integration, increasing transfer capacity of existing transmission lines is essential. Real-time path rating provides a promising approach to enabling additional power transfer capability and fully utilizing transfer capability. In this paper, the feasibility of real-time path rating is investigated. Several promising technologies to achieve real-time path rating are discussed. Various benefits that can be expected from real-time path rating, such as increased transfer capability and reduced total generation cost, are demonstrated through simulations conducted on the Western Electricity Coordinating Council system model.

  9. Time-stretch microscopy based on time-wavelength sequence reconstruction from wideband incoherent source

    SciTech Connect (OSTI)

    Zhang, Chi Xu, Yiqing; Wei, Xiaoming; Tsia, Kevin K.; Wong, Kenneth K. Y.

    2014-07-28

    Time-stretch microscopy has emerged as an ultrafast optical imaging concept offering the unprecedented combination of the imaging speed and sensitivity. However, dedicated wideband and coherence optical pulse source with high shot-to-shot stability has been mandated for time-wavelength mapping—the enabling process for ultrahigh speed wavelength-encoded image retrieval. From the practical point of view, exploiting methods to relax the stringent requirements (e.g., temporal stability and coherence) for the source of time-stretch microscopy is thus of great value. In this paper, we demonstrated time-stretch microscopy by reconstructing the time-wavelength mapping sequence from a wideband incoherent source. Utilizing the time-lens focusing mechanism mediated by a narrow-band pulse source, this approach allows generation of a wideband incoherent source, with the spectral efficiency enhanced by a factor of 18. As a proof-of-principle demonstration, time-stretch imaging with the scan rate as high as MHz and diffraction-limited resolution is achieved based on the wideband incoherent source. We note that the concept of time-wavelength sequence reconstruction from wideband incoherent source can also be generalized to any high-speed optical real-time measurements, where wavelength is acted as the information carrier.

  10. Tables for solution of the heat-conduction equation with a time-dependent heating rate

    E-Print Network [OSTI]

    Bergles A. E.

    1962-01-01

    Tables are presented for the solution of the transient onedimensional heat flow in a solid body of constant material properties with the heating rate at one boundary dependent on time. These tables allow convenient and ...

  11. Optimization Based Rate Allocation and Scheduling in TDMA Based Wireless Mesh Networks

    E-Print Network [OSTI]

    Torng, Eric

    access for community or enter- prise users. A typical wireless mesh network consists of mesh routers to mesh routers to access the Internet. In wireless mesh networks, inter-router and client-routerOptimization Based Rate Allocation and Scheduling in TDMA Based Wireless Mesh Networks Bo Wang

  12. RATES

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

    - Washoe Project, Stampede Division FERC Order Approving Extension of Non-Firm Power Formula Rate - Rate Order No. WAPA-160 (Sept. 5, 2013) (PDF - 22K) Notice of Extension of...

  13. Performance and energy efficiency of position-based routing in IEEE 802.15.4a low data rate Wireless

    E-Print Network [OSTI]

    Di Benedetto, Maria-Gabriella

    Performance and energy efficiency of position-based routing in IEEE 802.15.4a low data rate distributed positioning protocol based on Time Of Arrival and energy efficiency. Results also show that the energy efficiency of the position based routing protocol is affected by the accuracy distan eetma ared

  14. Real-time variable rate Pix® application system using a plant height sensor 

    E-Print Network [OSTI]

    Beck, Andy Dwayne

    2001-01-01

    . A cotton growth regulator (Pix) was applied at uniform and biomass-based variable rates in a replicated study that included two cotton fields. Plant mapping data was collected during the season. Plant heights were significantly shorter in areas...

  15. Comparing the College of Charleston to Other Institutions: Diversity-Acceptance Rates and Yield Rates of First-time, Full-time Degree-Seeking Students: by Time Status South Carolina Institutions

    E-Print Network [OSTI]

    Kunkle, Tom

    -Acceptance Rates and Yield Rates of First-time, Full-time Degree-Seeking Students: by Time Status South Carolina Citadel Military College of South Carolina 618 58 676 0 0 0 618 58 676 Clemson University 1,714 1,721 3,206 University of South Carolina-Columbia 2,019 2,561 4,580 26 19 45 2,045 2,580 4,625 Winthrop University 325

  16. Building Profits and Goodwill in the Wood Product Industry with Time-Of-Use Rates 

    E-Print Network [OSTI]

    Boyd, W. K.

    1986-01-01

    .S. are searching for alternatives to building generating plants. One of the alternatives used by Carolina Power & Light Company is Time-of-Use Rates. These rates give monetary incentives to customers who change their electrical usage patterns to coincide... manufacturer with a 235-employee plywood plant located in Moncure, North Carolina. The plant receives electric ser vice from Carolina Power & Light Company (CP&L), an investor-owned electric utility serving over 825,000 customers in North and South...

  17. Electricity Rate Structures and the Economics of Solar PV: Could Mandatory Time-of-Use Rates Undermine California’s Solar Photovoltaic Subsidies?

    E-Print Network [OSTI]

    Borenstein, Severin

    2007-01-01

    paper presented at the American Solar Energy Society 2004and the Economics of Solar PV: Could Mandatory Time-of-Rates Undermine California’s Solar Photovoltaic Subsidies?

  18. Bargaining-Based Rate Allocation for Non-Collaborative Multi-User Speech Communication Systems

    E-Print Network [OSTI]

    Alwan, Abeer

    function. In [2], the authors propose a rate allocation scheme for com- munication networks basedBargaining-Based Rate Allocation for Non-Collaborative Multi-User Speech Communication Systems@ee.ucla.edu ABSTRACT We propose a novel rate allocation algorithm for multi-user speech communication systems based

  19. Head & base production optimization : setup time reduction

    E-Print Network [OSTI]

    Guo, Haiqing

    2009-01-01

    At Schlumberger, the make-to-order strategy and number of Head & Base product types (about 1000 types) requires a flexible manufacturing system in which the machine setup is frequent. However, the lengthy CNC machine setup ...

  20. The radiative capture reaction rate from $??$ to H dibaryon in the imaginary time method

    E-Print Network [OSTI]

    E. Hikota; Y. Funaki; E. Hiyama; M. Oka

    2015-05-08

    Radiative capture rates of thermal $\\Lambda\\Lambda + \\Xi$N states into H dibaryon are calculated in the novel imaginary time method. The H dibaryon is assumed to be a bound state of $\\Xi $N with spin $J^{\\pi}= 0^+$, isospin $I=0$ and strangeness $-2$. We consider $E1$ transition to H from $\\Xi$N $(L=1)$ scattering states which mix with $\\Lambda\\Lambda (L=1)$. In order to calculate the transition rates, we formulate a coupled-channel imaginary time method by extending the one-channel formula originally proposed by Yabana and Funaki. The imaginary time method allows us to avoid the sum over all the excited thermal initial states, and thus to save computational time significantly. The transition rates are given as a function of temperature and the unknown binding energy of the H dibaryon, which we take as a parameter. It is found that the transition rate is not sensitive to the choices of the H binding energy or the strengths of the channel coupling for temperatures 3 MeV or higher.

  1. The radiative capture reaction rate from $\\Lambda \\Lambda$ to H dibaryon in the imaginary time method

    E-Print Network [OSTI]

    Hikota, E; Hiyama, E; Oka, M

    2015-01-01

    Radiative capture rates of thermal $\\Lambda\\Lambda + \\Xi$N states into H dibaryon are calculated in the novel imaginary time method. The H dibaryon is assumed to be a bound state of $\\Xi $N with spin $J^{\\pi}= 0^+$, isospin $I=0$ and strangeness $-2$. We consider $E1$ transition to H from $\\Xi$N $(L=1)$ scattering states which mix with $\\Lambda\\Lambda (L=1)$. In order to calculate the transition rates, we formulate a coupled-channel imaginary time method by extending the one-channel formula originally proposed by Yabana and Funaki. The imaginary time method allows us to avoid the sum over all the excited thermal initial states, and thus to save computational time significantly. The transition rates are given as a function of temperature and the unknown binding energy of the H dibaryon, which we take as a parameter. It is found that the transition rate is not sensitive to the choices of the H binding energy or the strengths of the channel coupling for temperatures 3 MeV or higher.

  2. Time-gated single-photon detection module with 110 ps transition time and up to 80 MHz repetition rate

    SciTech Connect (OSTI)

    Buttafava, Mauro, E-mail: mauro.buttafava@polimi.it; Boso, Gianluca; Ruggeri, Alessandro; Tosi, Alberto [Politecnico di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria, Piazza Leonardo Da Vinci 32, 20133 Milano (Italy); Dalla Mora, Alberto [Politecnico di Milano, Dipartimento di Fisica, Piazza Leonardo Da Vinci 32, 20133 Milano (Italy)

    2014-08-15

    We present the design and characterization of a complete single-photon counting module capable of time-gating a silicon single-photon avalanche diode with ON and OFF transition times down to 110 ps, at repetition rates up to 80 MHz. Thanks to this sharp temporal filtering of incoming photons, it is possible to reject undesired strong light pulses preceding (or following) the signal of interest, allowing to increase the dynamic range of optical acquisitions up to 7 decades. A complete experimental characterization of the module highlights its very flat temporal response, with a time resolution of the order of 30 ps. The instrument is fully user-configurable via a PC interface and can be easily integrated in any optical setup, thanks to its small and compact form factor.

  3. Real Time PMU-Based Stability Monitoring Final Project Report

    E-Print Network [OSTI]

    Real Time PMU-Based Stability Monitoring Final Project Report Power Systems Engineering Research Center Empowering Minds to Engineer the Future Electric Energy System #12;#12;Real Time PMU for the Power Systems Engineering Research Center (PSERC) research project titled "Real Time PMU-based Stability

  4. ARC: An Integrated Admission and Rate Control Framework for CDMA Data Networks Based on

    E-Print Network [OSTI]

    Chatterjee, Mainak

    strategy set so as to maximize the utility (revenue) yet at- taining its target churn rate (the probabilityARC: An Integrated Admission and Rate Control Framework for CDMA Data Networks Based on Non this perspective, we propose an integrated admission and rate control (ARC) framework for CDMA based wire- less

  5. Subtypes of aggressive children based on parent ratings 

    E-Print Network [OSTI]

    Rodman, Jennifer K

    2013-02-22

    for aggressive behaviors on each of the eight subscales were above average. Cluster 2 consisted of 31 children who were rated by their parents as only average in aggressive behaviors on all eight subscales. Because all 54 subjects in this study had been...

  6. Solid-state track recorder dosimetry device to measure absolute reaction rates and neutron fluence as a function of time

    DOE Patents [OSTI]

    Gold, Raymond (1393 George Washington Way, Suite No. 7, P.O. Box 944, Richland, WA 99352); Roberts, James H. (1393 George Washington Way, Suite No. 7, P.O. Box 944, Richland, WA 99352)

    1989-01-01

    A solid state track recording type dosimeter is disclosed to measure the time dependence of the absolute fission rates of nuclides or neutron fluence over a period of time. In a primary species an inner recording drum is rotatably contained within an exterior housing drum that defines a series of collimating slit apertures overlying windows defined in the stationary drum through which radiation can enter. Film type solid state track recorders are positioned circumferentially about the surface of the internal recording drum to record such radiation or its secondary products during relative rotation of the two elements. In another species both the recording element and the aperture element assume the configuration of adjacent disks. Based on slit size of apertures and relative rotational velocity of the inner drum, radiation parameters within a test area may be measured as a function of time and spectra deduced therefrom.

  7. Determination of equilibrium electron temperature and times using an electron swarm model with BOLSIG+ calculated collision frequencies and rate coefficients

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

    Pusateri, Elise N.; Morris, Heidi E.; Nelson, Eric M.; Ji, Wei

    2015-08-04

    Electromagnetic pulse (EMP) events produce low-energy conduction electrons from Compton electron or photoelectron ionizations with air. It is important to understand how conduction electrons interact with air in order to accurately predict EMP evolution and propagation. An electron swarm model can be used to monitor the time evolution of conduction electrons in an environment characterized by electric field and pressure. Here a swarm model is developed that is based on the coupled ordinary differential equations (ODEs) described by Higgins et al. (1973), hereinafter HLO. The ODEs characterize the swarm electric field, electron temperature, electron number density, and drift velocity. Importantmore »swarm parameters, the momentum transfer collision frequency, energy transfer collision frequency, and ionization rate, are calculated and compared to the previously reported fitted functions given in HLO. These swarm parameters are found using BOLSIG+, a two term Boltzmann solver developed by Hagelaar and Pitchford (2005), which utilizes updated cross sections from the LXcat website created by Pancheshnyi et al. (2012). We validate the swarm model by comparing to experimental effective ionization coefficient data in Dutton (1975) and drift velocity data in Ruiz-Vargas et al. (2010). In addition, we report on electron equilibrium temperatures and times for a uniform electric field of 1 StatV/cm for atmospheric heights from 0 to 40 km. We show that the equilibrium temperature and time are sensitive to the modifications in the collision frequencies and ionization rate based on the updated electron interaction cross sections.« less

  8. Financial-Based (FB) CRAC (rates/adjustments)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article) |Final Report DocumentRatesFinancialFinancial

  9. A new measure of acceleration of heart rate: dependence on age and comparison with time domain conventional heart rate variability measures

    E-Print Network [OSTI]

    Cammarota, Camillo

    A new measure of acceleration of heart rate: dependence on age and comparison with time domain conventional heart rate variability measures Giuseppe Germanò, M.D., Gianfranco Piccirillo, M.D., *Camillo We introduce a new index, Acceleration Ratio (AR), in order to investigate the dependence of Heart

  10. Search for time modulations in the decay rate of 40K and 232Th

    E-Print Network [OSTI]

    E. Bellotti; C. Broggini; G. Di Carlo; M. Laubenstein; R. Menegazzo; M. Pietroni

    2014-05-13

    Time modulations at per mil level have been reported to take place in the decay constant of about 15 nuclei with period of one year (most cases) but also of about one month or one day. In this paper we give the results of the activity measurement of a 40K source and a 232Th one. The two experiments have been done at the Gran Sasso Laboratory during a period of about 500 days, above ground (40K) and underground (232Th) with a target sensitivity of a few parts over 10^5. We also give the results of the activity measurement at the time of the X-class solar flares which took place in May 2013. Briefly, our measurements do not show any evidence of unexpected time dependence in the decay rate of 40K and 232Th.

  11. Unruh-DeWitt detector event rate for trajectories with time-dependent acceleration

    E-Print Network [OSTI]

    Luis C. Barbado; Matt Visser

    2012-10-25

    We analyse the response function of an Unruh--DeWitt detector moving with time-dependent acceleration along a one-dimensional trajectory in Minkowski spacetime. To extract the physics of the process, we propose an adiabatic expansion of this response function. This expansion is also a useful tool for computing the click rate of detectors in general trajectories. The expansion is done in powers of the time derivatives of the acceleration (jerk, snap, and higher derivatives). At the lowest order, we recover a Planckian spectrum with temperature proportional to the acceleration of the detector at each instant of the trajectory. Higher orders in the expansion involve powers of the derivatives of the acceleration, with well-behaved spectral coefficients with different shapes. Finally, we illustrate this analysis in the case of an initially inertial trajectory that acquires a given constant acceleration in a finite time.

  12. Unruh-DeWitt detector event rate for trajectories with time-dependent acceleration

    E-Print Network [OSTI]

    Barbado, Luis C

    2012-01-01

    We analyse the response function of an Unruh--DeWitt detector moving with time-dependent acceleration along a one-dimensional trajectory in Minkowski spacetime. To extract the physics of the process, we propose an adiabatic expansion of this response function. This expansion is also a useful tool for computing the click rate of detectors in general trajectories. The expansion is done in powers of the time derivatives of the acceleration (jerk, snap, and higher derivatives). At the lowest order, we recover a Planckian spectrum with temperature proportional to the acceleration of the detector at each instant of the trajectory. Higher orders in the expansion involve powers of the derivatives of the acceleration, with well-behaved spectral coefficients with different shapes. Finally, we illustrate this analysis in the case of an initially inertial trajectory that acquires a given constant acceleration in a finite time.

  13. Time-Based Behaviors at an Interactive Science Museum

    E-Print Network [OSTI]

    Short, Daniel

    Time-Based Behaviors at an Interactive Science Museum: Exploring the Differences between Weekday@sunstroke.sdsu.edu Received 21 October 1996; accepted 15 May 1997 ABSTRACT: The purpose of this study was to determine if time) regardless of the day of the visit, families spent more time than nonfamilies in individual exhibitions

  14. An evaluation of technologies for real-time measurement of rates of outdoor airflow into HVAC systems

    SciTech Connect (OSTI)

    Fisk, William J.; Faulkner, David; Sullivan, Douglas P.

    2004-09-01

    During the last few years, new technologies have been introduced for real-time continuous measurement of the flow rates of outdoor air (OA) into HVAC systems; however, an evaluation of these measurement technologies has not previously been published. This document describes a test system and protocols developed for a controlled evaluation of these measurement technologies. The results of tests of four commercially available measurement technologies and one prototype based on a new design are also summarized. The test system and protocol were judged practical and very useful. The series of tests identified three commercially available measurement technologies that should provide reasonably accurate measurements of OA flow rates as long as air velocities are maintained high enough to produce accurately measurable pressure signals. In HVAC systems with economizer controls, to maintain the required air velocities the OA intake will need to be divided into two sections in parallel, each with a separate OA damper. The errors in OA flow rates measured with the fourth commercially available measurement technology were 20% to 30% with horizontal probes but much larger with vertical probes. The new prototype measurement technology was the only one that appears suitable for measuring OA flow rates over their full range from 20% OA to 100% OA without using two separate OA dampers. All of the measurement devices had pressure drops that are likely to be judged acceptable. The influence of wind on the accuracy of these measurement technologies still needs to be evaluated.

  15. Laboratory-Based Maximum Slip Rates in Earthquake Rupture Zones and Radiated Energy

    E-Print Network [OSTI]

    New Hampshire, University of

    Laboratory-Based Maximum Slip Rates in Earthquake Rupture Zones and Radiated Energy by A. McGarr, J. B. Fletcher, M. Boettcher, N. Beeler, and J. Boatwright Abstract Laboratory stick-slip friction and the maximum slip rate. From laboratory results, the maximum slip rate for any crustal earthquake, as well

  16. Credit-Based Interest Rate Spread for Title XVII

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electric vehicle (PEV)Day-June2012 |DepartmentRemarksHomemadeCredit-Based

  17. Pricing Electricity for Default Customers: Pass Through or Performance-Based Rates?

    E-Print Network [OSTI]

    California at Berkeley. University of

    becomes profitable, UDCs might use their distribution assets to stifle competition in the retail marketPWP-066 Pricing Electricity for Default Customers: Pass Through or Performance-Based Rates? Carl;1 Pricing Electricity for Default Customers: Pass Through or Performance-Based Rates? Carl Blumstein1 August

  18. Author's personal copy GPU based real-time instrument tracking

    E-Print Network [OSTI]

    Author's personal copy GPU based real-time instrument tracking with three-dimensional ultrasound q April 2007; accepted 4 June 2007 Available online 5 July 2007 Abstract Real-time three-dimensional ultrasound enables new intracardiac surgical procedures, but the distorted appearance of instruments

  19. VIRTUAL TIME BASED DYNAMIC LOAD MANAGEMENT IN THE TIME WARP OPERATING SYSTEM

    E-Print Network [OSTI]

    California at Los Angeles, University of

    VIRTUAL TIME BASED DYNAMIC LOAD MANAGEMENT IN THE TIME WARP OPERATING SYSTEM Peter L. Reiher Jet on parallel machines. Recently TWOS has been substantially improved by the addition of dynamic load management to processors. Because TWOS uses optimistic synchronization, existing load management theory, which tends

  20. Statistics of Landscapes Based on Free Energies, Replication and Degradation Rate Constants of

    E-Print Network [OSTI]

    Stadler, Peter F.

    Statistics of Landscapes Based on Free Energies, Replication and Degradation Rate Constants of RNA are computed from primary sequences by means of a folding algorithm which uses a minimum free energy criterion. Free energies as well as replication and degradation rate constants are derived from secondary

  1. Service Outage Based Power and Rate Allocation Jianghong Luo, Lang Lin, Roy Yates, and Predrag Spasojevic

    E-Print Network [OSTI]

    Yates, Roy

    1 Service Outage Based Power and Rate Allocation Jianghong Luo, Lang Lin, Roy Yates, and Predrag Spasojevi´c Abstract--This paper combines the concepts of ergodic capac- ity and capacity versus outage for fading channels, and explores variable rate transmissions under a service outage constraint in a block

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

    E-Print Network [OSTI]

    Berry, Randall

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

  3. Sequence-Based Prediction of Protein Folding Rates Using Contacts, Secondary Structures and Support Vector Machines

    E-Print Network [OSTI]

    Cheng, Jianlin Jack

    Sequence-Based Prediction of Protein Folding Rates Using Contacts, Secondary Structures and Support, Columbia, Missouri * Corresponding author: chengji@missouri.edu Abstract Predicting protein folding rate is useful for understanding protein folding process and guiding protein design. Here we developed a method

  4. Paleolimnological investigations of anthropogenic environmental change in Lake Tanganyika: II. Geochronologies and mass sedimentation rates based

    E-Print Network [OSTI]

    . Geochronologies and mass sedimentation rates based on 14 C and 210 Pb data Brent A. McKee1, *, Andrew S. Cohen2 accumulation rates, Soil erosion Abstract We established sediment geochronologies for cores from eight deltaic with pre-20th century conditions. In this study we provide geochronological data from cores collected

  5. Abstract--Time-frequency analysis of heart rate variability (HRV) makes it easier to evaluate how the balance

    E-Print Network [OSTI]

    Carvalho, João Luiz

    Abstract--Time-frequency analysis of heart rate variability (HRV) makes it easier to evaluate how-regressive model can be used to calculate the Power Spectrum Density of HRV and to create an auto of optimal orders for different interpolation rates of the HRV signal are presented. Keywords--AR model order

  6. A Well Performance Study of Eagle Ford Shale Gas Wells Integrating Empirical Time-Rate and Analytical Time-Rate-Pressure Analysis 

    E-Print Network [OSTI]

    Davis, Avery S

    2015-08-10

    estimated flowrate decline and historic gas flowrate data (qg) versus production time. ............................................................................................................................ 69 4.14 (Log-log Plot): PVT revised gas 30.... ................................................................................................................. 80 4.28 (Log-log Plot): PVT revised gas 30-year estimated cumulative production volume model comparison –– Arps modified hyperbolic decline model, power-law exponential decline model, and 50 percent and 100 percent completion efficiency RTA model...

  7. PRESSURE AND TEMPERATURE DEPENDENT DEFLAGRATION RATE MEASUREMENTS OF LLM-105 AND TATB BASED EXPLOSIVES

    SciTech Connect (OSTI)

    Glascoe, E A; Tan, N; Koerner, J; Lorenz, K T; Maienschein, J L

    2009-11-10

    The pressure dependent deflagration rates of LLM-105 and TATB based formulations were measured in the LLNL high pressure strand burner. The role of binder amount, explosive type, and thermal damage and their effects on the deflagration rate will be discussed. Two different formulations of LLM-105 and three formulations of TATB were studied and results indicate that binder amount and type play a minor role in the deflagration behavior. This is in sharp contrast to the HMX based formulations which strongly depend on binder amount and type. The effect of preheating these samples was considerably more dramatic. In the case of LLM-105, preheating the sample appears to have little effect on the deflagration rate. In contrast, preheating TATB formulations causes the deflagration rate to accelerate and become erratic. The thermal and mechanical properties of these formulations will be discussed in the context of their pressure and temperature dependent deflagration rates.

  8. Fact #631: July 12, 2010 Top 10 All-Time EPA Rated Vehicles

    Broader source: Energy.gov [DOE]

    Fueleconomy.gov is the official source for light vehicle fuel economy ratings. The Web site has data extending back to 1984 and has recently published a list showing the highest-rated vehicles over...

  9. In vivo real-time dosimetric verification in high dose rate prostate brachytherapy

    SciTech Connect (OSTI)

    Seymour, Erin L.; Downes, Simon J.; Fogarty, Gerald B.; Izard, Michael A.; Metcalfe, Peter

    2011-08-15

    Purpose: To evaluate the performance of a diode array in the routine verification of planned dose to points inside the rectum from prostate high dose rate (HDR) brachytherapy using a real-time planning system. Methods: A dosimetric study involving 28 patients was undertaken where measured doses received during treatment were compared to those calculated by the treatment planning system (TPS). After the ultrasound imaging required for treatment planning had been recorded, the ultrasound probe was replaced with a geometric replica that contained an 8 mm diameter cylindrical cavity in which a PTW diode array type 9112 was placed. The replica probe was then positioned inside the rectum with the individual diode positions determined using fluoroscopy. Dose was then recorded during the patients' treatment and compared to associated coordinates in the planning system. Results: Factors influencing diode response and experimental uncertainty were initially investigated to estimate the overall uncertainty involved in dose measurements, which was determined to be {+-}10%. Data was acquired for 28 patients' first fractions, 11 patients' second fractions, and 13 patients' third fractions with collection dependent upon circumstances. Deviations between the diode measurements and predicted values ranged from -42% to +35% with 71% of measurements experiencing less than a 10% deviation from the predicted values. If the {+-}10% measurement uncertainty was combined with a tolerated dose discrepancy of {+-}10% then over 95% of the diode results exhibited agreement with the calculated data to within {+-}20%. It must also be noted that when large dose discrepancies were apparent they did not necessarily occur for all five diodes in the one measurement. Conclusions: This technique provided a method that could be utilized to detect gross errors in dose delivery of a real-time prostate HDR plan. Limitations in the detection system used must be well understood if meaningful results are to be achieved.

  10. Molecule-based approach for computing chemical-reaction rates in upper atmosphere hypersonic flows.

    SciTech Connect (OSTI)

    Gallis, Michail A.; Bond, Ryan Bomar; Torczynski, John Robert

    2009-08-01

    This report summarizes the work completed during FY2009 for the LDRD project 09-1332 'Molecule-Based Approach for Computing Chemical-Reaction Rates in Upper-Atmosphere Hypersonic Flows'. The goal of this project was to apply a recently proposed approach for the Direct Simulation Monte Carlo (DSMC) method to calculate chemical-reaction rates for high-temperature atmospheric species. The new DSMC model reproduces measured equilibrium reaction rates without using any macroscopic reaction-rate information. Since it uses only molecular properties, the new model is inherently able to predict reaction rates for arbitrary nonequilibrium conditions. DSMC non-equilibrium reaction rates are compared to Park's phenomenological non-equilibrium reaction-rate model, the predominant model for hypersonic-flow-field calculations. For near-equilibrium conditions, Park's model is in good agreement with the DSMC-calculated reaction rates. For far-from-equilibrium conditions, corresponding to a typical shock layer, the difference between the two models can exceed 10 orders of magnitude. The DSMC predictions are also found to be in very good agreement with measured and calculated non-equilibrium reaction rates. Extensions of the model to reactions typically found in combustion flows and ionizing reactions are also found to be in very good agreement with available measurements, offering strong evidence that this is a viable and reliable technique to predict chemical reaction rates.

  11. Energy-based Rate Adaptation for 802.11n Chunyi Peng1

    E-Print Network [OSTI]

    Shihada, Basem

    . Marginal throughput gain may be realized at high energy cost. We propose EERA, an energy-based RA solution obtain high goodput at whatever energy cost. Marginal goodput gain is realized by pow- ering on moreEnergy-based Rate Adaptation for 802.11n Chi-Yu Li1 Chunyi Peng1 Songwu Lu1 Xinbing Wang2 1

  12. FIELD-BASED TECHNOLOGY EDUCATION: JUST IN TIME TECHNOLOGY TRAINING

    E-Print Network [OSTI]

    Larkin, Teresa L.

    FIELD-BASED TECHNOLOGY EDUCATION: JUST IN TIME TECHNOLOGY TRAINING Sarah Irvine Belson1 and Teresa, Audio Technology, and Physics, American University, 4400 Massachusetts Ave. NW, Washington, DC 20016, tlarkin@american.edu Abstract -- This paper outlines the current status of technology integration

  13. Synchronizing compute node time bases in a parallel computer

    DOE Patents [OSTI]

    Chen, Dong; Faraj, Daniel A; Gooding, Thomas M; Heidelberger, Philip

    2014-12-30

    Synchronizing time bases in a parallel computer that includes compute nodes organized for data communications in a tree network, where one compute node is designated as a root, and, for each compute node: calculating data transmission latency from the root to the compute node; configuring a thread as a pulse waiter; initializing a wakeup unit; and performing a local barrier operation; upon each node completing the local barrier operation, entering, by all compute nodes, a global barrier operation; upon all nodes entering the global barrier operation, sending, to all the compute nodes, a pulse signal; and for each compute node upon receiving the pulse signal: waking, by the wakeup unit, the pulse waiter; setting a time base for the compute node equal to the data transmission latency between the root node and the compute node; and exiting the global barrier operation.

  14. Time-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing in Duty-Cycle Wireless Sensor Networks withDuty-Cycle Wireless Sensor Networks withDuty-Cycle Wireles

    E-Print Network [OSTI]

    Wu, Jie

    Time-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing in Duty-Cycle Wireless Sensor Networks with TEMPLE UNIVERSITY #12;Introduction: utility-based routingIntroduction: utility-based routing

  15. Broad-Scale Analysis Contradicts the Theory That Generation Time Affects Molecular Evolutionary Rates in Plants

    E-Print Network [OSTI]

    Johnston, Mark

    Abstract. Several studies of plant taxa have con- cluded that generation time, including annual/ perennial in animals, there is little theoretical basis for why generation-time effects would exist in plants. Furthermore, previous reports fail to establish the generality of a generation-time effect in plants be- cause

  16. Developing Embedded/Real-Time and Cyber-Physical Systems: Functional Reactive Programming, RTL-based Formal Verification, Response Time

    E-Print Network [OSTI]

    Cheng, Albert M. K.

    , specification, modeling, scheduling, and formal verification of real- time, embedded, and cyber-physical systems-based Formal Verification, Response Time Analysis, and Power-Aware Scheduling Albert M. K. Cheng Real reactive programming, RTL (real-time logic)-based formal verification, response time analysis, and power

  17. The nuclear fusion reaction rate based on relativistic equilibrium velocity distribution

    E-Print Network [OSTI]

    Jian-Miin Liu

    2002-10-20

    The Coulomb barrier is in general much higher than thermal energy. Nuclear fusion reactions occur only among few protons and nuclei with higher relative energies than Coulomb barrier. It is the equilibrium velocity distribution of these high-energy protons and nuclei that participates in determining the rate of nuclear fusion reactions. In the circumstance it is inappropriate to use the Maxwellian velocity distribution for calculating the nuclear fusion reaction rate. We use the relativistic equilibrium velocity distribution for this purpose. The rate based on the relativistic equilibrium velocity distribution has a reduction factor with respect to that based on the Maxwellian distribution, which factor depends on the temperature, reduced mass and atomic numbers of the studied nuclear fusion reactions. This signifies much to the solar neutrino problem.

  18. Rate Adaptation and Base Station Reconfiguration for Battery Efficient Video Download

    E-Print Network [OSTI]

    Dey, Sujit

    dynamically depending on battery and buffer levels of the mobile device, the channel conditions experienced conditions so as to avoid stalling, and do not consider the effect of video download on mobile device batteryRate Adaptation and Base Station Reconfiguration for Battery Efficient Video Download Ranjini

  19. Cut-off Rate based Outage Probability Analysis of Frequency Hopping Mobile Radio under Jamming

    E-Print Network [OSTI]

    Yýlmaz, Özgür

    Cut-off Rate based Outage Probability Analysis of Frequency Hopping Mobile Radio under Jamming--This paper deals with the achievable spectral ef- ficiency and outage analysis of short burst frequency hopping (FH) mobile radios under heavy jamming scenarios. With the use of outage probability analysis

  20. Service Outage Based Power and Rate Allocation for Parallel Fading Channels

    E-Print Network [OSTI]

    Yates, Roy

    1 Service Outage Based Power and Rate Allocation for Parallel Fading Channels Jianghong Luo, Member, IEEE, Roy Yates, Member, IEEE, and Predrag Spasojevi´c, Member, IEEE Abstract-- The service outage of ergodic capacity and outage capacity for fading channels. A service outage occurs when the transmission

  1. Multi-rate Estimation of Coloured Noise Models in Graph-Based Estimation Algorithms

    E-Print Network [OSTI]

    Nelson, James

    Multi-rate Estimation of Coloured Noise Models in Graph-Based Estimation Algorithms Simon J. Julier. In this paper, we consider how coloured noise models can be efficiently incorporated within graph position, three velocity, three orientation). The GPS noise model introduces an extra six states (second

  2. WWW.THEEIR.COM THE EUROPEAN INVESTMENT REVIEW 1 A RATING-BASED

    E-Print Network [OSTI]

    Jeanblanc, Monique

    WWW.THEEIR.COM THE EUROPEAN INVESTMENT REVIEW 1 A RATING-BASED MODEL FOR CREDIT DERIVATIVES not sustained by itself derivative-linked liabilities on oil and elec- tricitycontracts INVESTMENT REVIEW WWW.THEEIR.COM is a positive random function of the two vari- ables x and R, which

  3. Electricity Rate Structures and the Economics of Solar PV: Could Mandatory Time-of-Use Rates Undermine California’s Solar Photovoltaic Subsidies?

    E-Print Network [OSTI]

    Borenstein, Severin

    2007-01-01

    CSEM WP 172 Electricity Rate Structures and the Economics of94720-5180 www.ucei.org Electricity Rate Structures and thefuture of California electricity rate levels and rate design

  4. A contactless microwave-based diagnostic tool for high repetition rate laser systems

    SciTech Connect (OSTI)

    Braggio, C., E-mail: caterina.braggio@unipd.it [Dip. di Fisica e Astronomia and INFN sez. di Padova, Via F. Marzolo 8, I-35131 Padova (Italy); Borghesani, A. F. [CNISM unit, Dip. di Fisica e Astronomia and INFN sez. di Padova, Via F. Marzolo 8, I-35131 Padova (Italy)] [CNISM unit, Dip. di Fisica e Astronomia and INFN sez. di Padova, Via F. Marzolo 8, I-35131 Padova (Italy)

    2014-02-15

    We report on a novel electro-optic device for the diagnostics of high repetition rate laser systems. It is composed of a microwave receiver and of a second order nonlinear crystal, whose irradiation with a train of short laser pulses produces a time-dependent polarization in the crystal itself as a consequence of optical rectification. This process gives rise to the emission of microwave radiation that is detected by a receiver and is analyzed to infer the repetition rate and intensity of the pulses. We believe that this new method may overcome some of the limitations of photodetection techniques.

  5. Provocative radio transients and base rate bias: a Bayesian argument for conservatism

    E-Print Network [OSTI]

    Hair, Thomas W

    2012-01-01

    Most searches for alien radio transmission have focused on finding omni-directional or purposefully earth-directed beams of enduring duration. However, most of the interesting signals so far detected have been transient and non-repeatable in nature. These signals could very well be the first data points in an ever-growing data base of such signals used to construct a probabilistic argument for the existence of extraterrestrial intelligence. This paper looks at the effect base rate bias could have on deciding which signals to include in such an archive based upon the likely assumption that our ability to discern natural from artificial signals will be less than perfect.

  6. Engine control system having pressure-based timing

    DOE Patents [OSTI]

    Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

    2011-10-04

    A control system for an engine having a first cylinder and a second cylinder is disclosed having a first engine valve movable to regulate a fluid flow of the first cylinder and a first actuator associated with the first engine valve. The control system also has a second engine valve movable to regulate a fluid flow of the second cylinder and a sensor configured to generate a signal indicative of a pressure within the first cylinder. The control system also has a controller that is in communication with the first actuator and the sensor. The controller is configured to compare the pressure within the first cylinder with a desired pressure and selectively regulate the first actuator to adjust a timing of the first engine valve independently of the timing of the second engine valve based on the comparison.

  7. Engine control system having speed-based timing

    DOE Patents [OSTI]

    Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

    2012-02-14

    A control system for an engine having a cylinder is disclosed having an engine valve movable to regulate a fluid flow of the cylinder and an actuator associated with the engine valve. The control system also has a controller in communication with the actuator. The controller is configured to receive a signal indicative of engine speed and compare the engine speed signal with a desired engine speed. The controller is also configured to selectively regulate the actuator to adjust a timing of the engine valve to control an amount of air/fuel mixture delivered to the cylinder based on the comparison.

  8. Engine control system having fuel-based timing

    DOE Patents [OSTI]

    Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

    2012-04-03

    A control system for an engine having a cylinder is disclosed having an engine valve movable to regulate a fluid flow of the cylinder and an actuator associated with the engine valve. The control system also has a sensor configured to generate a signal indicative of an amount of an air/fuel mixture remaining within the cylinder after completion of a first combustion event and a controller in communication with the actuator and the sensor. The controller may be configured to compare the amount with a desired amount, and to selectively regulate the actuator to adjust a timing of the engine valve associated with a subsequent combustion event based on the comparison.

  9. The Effect of Planting Strategies, Imazethapyr Rates, and Application Timings on CLEARFIELD® Hybrid Rice Injury 

    E-Print Network [OSTI]

    Turner, Aaron Lyles

    2012-02-14

    recommendations. Research was performed to test the hybrids on the effect of planting date, planting density, and imazethapyr application rate on visual plant injury at Beaumont and Eagle Lake, TX in 2008 and 2009. A secondary experiment was designed to test...

  10. High Efficiency and High Rate Deposited Amorphous Silicon-Based Solar Cells

    E-Print Network [OSTI]

    Deng, Xunming

    1 High Efficiency and High Rate Deposited Amorphous Silicon-Based Solar Cells PHASE II Annual-Efficiency Single-Junction a-SiGe Solar Cells Section 3 Optimization of High-efficiency a-Si Top Cell Section 4. Figure 2-3 J-V curve of a single-junction a-SiGe solar cell with initial, active-area efficiency

  11. Impact of Rate Design Alternatives on Residential Solar Customer Bills. Increased Fixed Charges, Minimum Bills and Demand-based Rates

    SciTech Connect (OSTI)

    Bird, Lori; Davidson, Carolyn; McLaren, Joyce; Miller, John

    2015-09-01

    With rapid growth in energy efficiency and distributed generation, electric utilities are anticipating stagnant or decreasing electricity sales, particularly in the residential sector. Utilities are increasingly considering alternative rates structures that are designed to recover fixed costs from residential solar photovoltaic (PV) customers with low net electricity consumption. Proposed structures have included fixed charge increases, minimum bills, and increasingly, demand rates - for net metered customers and all customers. This study examines the electricity bill implications of various residential rate alternatives for multiple locations within the United States. For the locations analyzed, the results suggest that residential PV customers offset, on average, between 60% and 99% of their annual load. However, roughly 65% of a typical customer's electricity demand is non-coincidental with PV generation, so the typical PV customer is generally highly reliant on the grid for pooling services.

  12. Highly charged ion based time of flight emission microscope

    DOE Patents [OSTI]

    Barnes, Alan V. (Livermore, CA); Schenkel, Thomas (San Francisco, CA); Hamza, Alex V. (Livermore, CA); Schneider, Dieter H. (Livermore, CA); Doyle, Barney (Albuquerque, NM)

    2001-01-01

    A highly charged ion based time-of-flight emission microscope has been designed, which improves the surface sensitivity of static SIMS measurements because of the higher ionization probability of highly charged ions. Slow, highly charged ions are produced in an electron beam ion trap and are directed to the sample surface. The sputtered secondary ions and electrons pass through a specially designed objective lens to a microchannel plate detector. This new instrument permits high surface sensitivity (10.sup.10 atoms/cm.sup.2), high spatial resolution (100 nm), and chemical structural information due to the high molecular ion yields. The high secondary ion yield permits coincidence counting, which can be used to enhance determination of chemical and topological structure and to correlate specific molecular species.

  13. SumTime-Turbine: A Knowledge-Based System to Communicate Gas Turbine Time-Series Data

    E-Print Network [OSTI]

    Reiter, Ehud

    SumTime-Turbine: A Knowledge-Based System to Communicate Gas Turbine Time-Series Data Jin Yu of Aberdeen Aberdeen, AB24 3UE, UK {jyu, ereiter, jhunter, ssripada}@csd.abdn.ac.uk Abstract: SumTime-Turbine produces textual summaries of archived time- series data from gas turbines. These summaries should help

  14. Characteristics of high-rate energy spectroscopy systems using HPGe coaxial detectors and time-variant filters

    SciTech Connect (OSTI)

    Britton, C.L.; Becker, T.H.; Paulus, T.J.; Trammell, R.C.

    1984-02-01

    A high-rate, high-resolution gamma spectrometer system is described. The system consists of a reverse electrode HPGe coaxial detector, a transistor reset preamplifier, an active, semi-Gaussian prefilter, a gated integrator, and a unique data acquisition system consisting of a 10 ..mu..s, 13 bit ADC, fast FIFO memory, 8k by 23 bit data memory, and computer interface circuitry under the control of a Z-80A ..mu..P. The effects of the various components on the throughput are described and throughput data is presented. The resolution and peak shift for various shaping times are presented for count rates up to 1 Mcps input rate using a mixed /sup 22/Na and /sup 60/Co source. The low rate resolutions of /sup 57/Co and /sup 60/Co for various shaping times using either the semi-Gaussian or gated integrator output are discussed as well as the low energy resolution and peak shifts in the presence of high energy events.

  15. Control Optimization for a Chilled Water Thermal Storage System Under a Complicated Time-of-Use Electricity Rate Schedule 

    E-Print Network [OSTI]

    Zhou, J.; Wei, G.; Turner, W.D.; Deng, S.; Claridge, D.E.; Contreras, O.

    2005-01-01

    .6 m) in diameter with a total volume capacity of 1,400,000 gallon (5,299,560 L). Under design conditions, the fully charged thermal storage tank can hold a cooling capacity of 12,000 ton-hr (42,204 kWh). The temperatures of the stratified chilled... of time for the tank to discharge is selected, as many higher-priced hours as possible. The time charge the tank is automatically determined as n, the average chiller production rate required e charging period is calculated from the total campus load...

  16. Effect of the inner glove environment on permeation rates and breakthrough times of selected solvent/glove combinations 

    E-Print Network [OSTI]

    Mathurin, David Ring

    1985-01-01

    , humidity and a near static air movement in conjunction with a zero pressure drop across the protective garment material, representing the environment in a glove during its use in the field, affect permeation rates and breakthrough times. The permeation... performance of protective materials, ACKNOWLEDGEMENTS I wish to express my sincere thanks to Prof. Harry J. Suggs for his guidance and counsel during this research. I would also like to thank Dr. Ralph J. Vernon and Dr. Richard D. Huchingson...

  17. A multiscale MDCT image-based breathing lung model with time-varying regional ventilation

    SciTech Connect (OSTI)

    Yin, Youbing, E-mail: youbing-yin@uiowa.edu [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States) [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States); IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City, IA 52242 (United States); Department of Radiology, The University of Iowa, Iowa City, IA 52242 (United States); Choi, Jiwoong, E-mail: jiwoong-choi@uiowa.edu [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States) [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States); IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City, IA 52242 (United States); Hoffman, Eric A., E-mail: eric-hoffman@uiowa.edu [Department of Radiology, The University of Iowa, Iowa City, IA 52242 (United States); Department of Biomedical Engineering, The University of Iowa, Iowa City, IA 52242 (United States); Department of Internal Medicine, The University of Iowa, Iowa City, IA 52242 (United States); Tawhai, Merryn H., E-mail: m.tawhai@auckland.ac.nz [Auckland Bioengineering Institute, The University of Auckland, Auckland (New Zealand); Lin, Ching-Long, E-mail: ching-long-lin@uiowa.edu [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States) [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States); IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City, IA 52242 (United States)

    2013-07-01

    A novel algorithm is presented that links local structural variables (regional ventilation and deforming central airways) to global function (total lung volume) in the lung over three imaged lung volumes, to derive a breathing lung model for computational fluid dynamics simulation. The algorithm constitutes the core of an integrative, image-based computational framework for subject-specific simulation of the breathing lung. For the first time, the algorithm is applied to three multi-detector row computed tomography (MDCT) volumetric lung images of the same individual. A key technique in linking global and local variables over multiple images is an in-house mass-preserving image registration method. Throughout breathing cycles, cubic interpolation is employed to ensure C{sub 1} continuity in constructing time-varying regional ventilation at the whole lung level, flow rate fractions exiting the terminal airways, and airway deformation. The imaged exit airway flow rate fractions are derived from regional ventilation with the aid of a three-dimensional (3D) and one-dimensional (1D) coupled airway tree that connects the airways to the alveolar tissue. An in-house parallel large-eddy simulation (LES) technique is adopted to capture turbulent-transitional-laminar flows in both normal and deep breathing conditions. The results obtained by the proposed algorithm when using three lung volume images are compared with those using only one or two volume images. The three-volume-based lung model produces physiologically-consistent time-varying pressure and ventilation distribution. The one-volume-based lung model under-predicts pressure drop and yields un-physiological lobar ventilation. The two-volume-based model can account for airway deformation and non-uniform regional ventilation to some extent, but does not capture the non-linear features of the lung.

  18. TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility-based Routing in Delay Tolerant Networksbased Routing in Delay Tolerant Networksbas

    E-Print Network [OSTI]

    Wu, Jie

    TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility- based Routing in Delay Tolerant Networksbased on utility-based routingIntroduction on utility-based routingIntroduction on utility-based routing

  19. The role and importance of porosity in the deflagration rates of HMX-based materials

    SciTech Connect (OSTI)

    Glascoe, E A; Hsu, P C; Springer, H K

    2011-03-15

    The deflagration behavior of thermally damaged HMX-based materials will be discussed. Strands of material were burned at pressures ranging from 10-300 MPa using the LLNL high pressure strand burner. Strands were heated in-situ and burned while still hot; temperatures range from 90-200 C and were chosen in order to allow for thermal damage of the material without significant decomposition of the HMX. The results indicate that multiple variables affect the burn rate but the most important are the polymorph of HMX and the nature and thermal stability of the non-HE portion of the material. Characterization of the strands indicate that the thermal soak produces significant porosity and permeability in the sample allowing for significantly faster burning due to the increased surface area and new pathways for flame spread into the material. Specifically, the deflagration rates of heated PBXN-9, LX-10, and PBX-9501 will be discussed and compared.

  20. Radio frequency phototube and optical clock: High resolution, high rate and highly stable single photon timing technique

    SciTech Connect (OSTI)

    Amur Margaryan

    2011-10-01

    A new timing technique for single photons based on the radio frequency phototube and optical clock or femtosecond optical frequency comb generator is proposed. The technique has a 20 ps resolution for single photons, is capable of operating with MHz frequencies and achieving 10 fs instability level.

  1. Real-time communication in FDDI-based networks 

    E-Print Network [OSTI]

    Kumar, Amit Virendra

    1995-01-01

    The Fiber Distributed Data Interface (FDDI) is recommended as a candidate for many hard real-time local-area communication systems. The Timed-Token Medium Access Control (MAC) Protocol of FDDI is capable of guaranteeing ...

  2. Tunneling time calculations for general finite wavepackets based on the presence time formalism

    E-Print Network [OSTI]

    O. del Barco; M. Ortuño; V. Gasparian

    2015-05-31

    We analyze the tunneling time problem via the presence time formalism. With this method we reproduce previous results for very long wavepackets and we are able to calculate the tunneling time for general wavepackets of arbitrary shape and length. The tunneling time for a general wavepacket is equal to the average over the energy components of the standard phase time. With this approach we can also calculate the time uncertainty. We have checked that the results obtained with this approach agree extremely well with numerical simulations of the wavepacket evolution.

  3. Discrimination of Locally Stationary Time Series Based on the Excess Mass Functional

    E-Print Network [OSTI]

    Polonik, Wolfgang

    Discrimination of Locally Stationary Time Series Based on the Excess Mass Functional Gabriel CHANDLER and Wolfgang POLONIK Discrimination of time series is an important practical problem the time series. Instead, features are measured for each time series, and discrimination is based

  4. 398 JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 21, NO. 2, APRIL 2012 High-Range Angular Rate Sensor Based on

    E-Print Network [OSTI]

    Chen, Zhongping

    398 JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 21, NO. 2, APRIL 2012 High-Range Angular Rate- bration in a microelectromechanical systems Coriolis vibratory gyroscope to produce a frequency-based measurement of the input angular rate. The system is enabled by a combination of a MEMS vibratory high

  5. Measuring the effects of explicit instructions and incentives on the idea generation rate of a crowd-based population

    E-Print Network [OSTI]

    Donnelly, Allan R. (Allan Richard)

    2013-01-01

    Management researchers have long sought strategies for increasing the rate and quality of ideas generated among workers. Additionally, the advent of internet-based communications has created opportunities for valuable ideas ...

  6. Analysis of Customer Enrollment Patterns in Time-Based Rate Programs...

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

    impacts, and benefits of these projects and is presenting the results on www.smartgrid.gov. A subset of the 99 SGIG projects is conducting consumer behavior studies. These...

  7. Analysis of Customer Enrollment Patterns in TIme-Based Rate Programs...

    Energy Savers [EERE]

    Behavior Studies (July 2013) The U.S. Department of Energy is implementing the Smart Grid Investment Grant (SGIG) program under the American Recovery and Reinvestment Act of...

  8. Apparent differences in stochastic growth rates based on timing of census: a cautionary note

    E-Print Network [OSTI]

    Rockwell, Robert F.

    ´ Laval, Ste-Foy, Quebec, Canada G1K 7P4 c Department of Ornithology, American Museum of Natural History) is often deter- mined by logistical constraints. In many cases, field studies focus on post-breeding census

  9. A Time Lag Model to Estimate Rainfall Rate Based on GOES Data

    E-Print Network [OSTI]

    Gilbes, Fernando

    . ­ The maximum horizontal range is 462 km, · Polar satellite ­ Altitude: 870 km ­ Advanced Microwave Sounding Unit-A (AMSU-A) ­ Microwave Humidity Sounder (MHS) ­ Observations every 12 hours · Geostationary for cloud at temperature T · S is the solar irradiance of GOES 12 8 Albedo from October 27, 2008 (18:35 UTC

  10. OG&E Uses Time-Based Rate Program to Reduce Peak Demand

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i nAand DOEDepartmentNew2008Group, Inc. Order(National4,

  11. Analysis of Customer Enrollment Patterns in TIme-Based Rate Programs:

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p u t y AEfficiencyEnergyDepartment ofInitial Results from

  12. Electricity Rate Structures and the Economics of Solar PV: Could Mandatory Time-of-Use Rates Undermine California’s Solar Photovoltaic Subsidies?

    E-Print Network [OSTI]

    Borenstein, Severin

    2007-01-01

    Wohlgemuth, “E?ects of soiling on PV module and radiometerand the Economics of Solar PV: Could Mandatory Time-of-Useand the Economics of Solar PV: Could Mandatory Time-of-Use

  13. Embedded Databases for Embedded Real-Time Systems: A Component-Based Approach1

    E-Print Network [OSTI]

    Embedded Databases for Embedded Real-Time Systems: A Component-Based Approach1 Aleksandra Tesanovi of embedded real-time systems has increased dramatically. At the same time, the amount of data that needs in embedded real-time systems. However, a database that can be used in an embedded real-time system must

  14. Short-time variations of the solar neutrino luminosity (Fourier analysis of the argon-37 production rate data)

    SciTech Connect (OSTI)

    Haubold, H.J.; Gerth, E.

    1985-01-25

    We continue the Fourier analysis of the argon-37 production rate for runs 18--80 observed in Davis' well known solar neutrino experiment. The method of Fourier analysis with the unequally-spaced data of Davis and associates is described and the discovered periods we compare with our recently published results for the analysis of runs 18--69 (Haubold and Gerth, 1983). The harmonic analysis of the data of runs 18--80 shows time variations of the solar neutrino flux with periods ..pi.. = 8.33; 5.26; 2.13; 1.56; 0.83; 0.64; 0.54; and 0.50 years, respectively, which confirms our earlier computations.

  15. An evaluation of three commercially available technologies forreal-time measurement of rates of outdoor airflow into HVAC systems

    SciTech Connect (OSTI)

    Fisk, William J.; Faulkner, David; Sullivan, Douglas P.

    2004-10-28

    During the last few years, new technologies have been introduced for real-time continuous measurement of the flow rates of outdoor air (OA) into HVAC systems; however, an evaluation of these measurements technologies has not previously been published. This document describes a test system and protocols developed for a controlled evaluation of these measurement technologies. The results of tests of three commercially available measurement technologies are also summarized. The test system and protocol were judged practical and very useful. The three commercially available measurement technologies should provide reasonably, e.g., 20%, accurate measurements of OA flow rates as long as air velocities are maintained high enough to produce accurately measurable pressure signals. In HVAC systems with economizer controls, to maintain the required air velocities the OA intake will need to be divided into two sections in parallel, each with a separate OA damper. All of the measurement devices had pressure drops that are likely to be judged acceptable. The influence of wind on the accuracy of these measurement technologies still needs to be evaluated.

  16. Real Time PMU-Based Stability Monitoring Final Project Report

    E-Print Network [OSTI]

    Center Empowering Minds to Engineer the Future Electric Energy System #12;#12;Real Time PMU, Western Area Power Administration Clifton Black, Southern Company David Schooley, Exelon the increasing amount of PMU data for operation, planning, protection, and control. This research proposes new

  17. TIME-BASED COORDINATED CHECKPOINTING NUNO F. NEVES

    E-Print Network [OSTI]

    Neves, Nuno

    checkpoint protocol that is well adapted to mobile environments. It uses time to indi- rectly coordinate the creation of new global states, and it saves two different types of checkpoints to adapt its behavior with standard benchmarks. RENEW - Recoverable Network of Workstations provides a flexible set of operations

  18. Raman Based Process Monitor For Continuous Real-Time Analysis Of High Level Radioactive Waste Components

    SciTech Connect (OSTI)

    Bryan, Samuel A.; Levitskaia, Tatiana G.; Schlahta, Stephan N.

    2008-05-27

    ABSTRACT A new monitoring system was developed at Pacific Northwest National Laboratory (PNNL) to quickly generate real-time data/analysis to facilitate a timely response to the dynamic characteristics of a radioactive high level waste stream. The developed process monitor features Raman and Coriolis/conductivity instrumentation configured for the remote monitoring, MatLab-based chemometric data processing, and comprehensive software for data acquisition/storage/archiving/display. The monitoring system is capable of simultaneously and continuously quantifying the levels of all the chemically significant anions within the waste stream including nitrate, nitrite, phosphate, carbonate, chromate, hydroxide, sulfate, and aluminate. The total sodium ion concentration was also determined independently by modeling inputs from on-line conductivity and density meters. In addition to the chemical information, this monitoring system provides immediate real-time data on the flow parameters, such as flow rate and temperature, and cumulative mass/volume of the retrieved waste stream. The components and analytical tools of the new process monitor can be tailored for a variety of complex mixtures in chemically harsh environments, such as pulp and paper processing liquids, electroplating solutions, and radioactive tank wastes. The developed monitoring system was tested for acceptability before it was deployed for use in Hanford Tank S-109 retrieval activities. The acceptance tests included performance inspection of hardware, software, and chemometric data analysis to determine the expected measurement accuracy for the different chemical species that are encountered during S-109 retrieval.

  19. Raman Based Process Monitor for Continuous Real-Time Analysis Of High Level Radioactive Waste Components

    SciTech Connect (OSTI)

    Bryan, S.; Levitskaia, T.; Schlahta, St. [Pacific Northwest National Laboratory, Richland, Washington (United States)

    2008-07-01

    A new monitoring system was developed at Pacific Northwest National Laboratory (PNNL) to quickly generate real-time data/analysis to facilitate a timely response to the dynamic characteristics of a radioactive high level waste stream. The developed process monitor features Raman and Coriolis/conductivity instrumentation configured for the remote monitoring, MatLab-based chemometric data processing, and comprehensive software for data acquisition/storage/archiving/display. The monitoring system is capable of simultaneously and continuously quantifying the levels of all the chemically significant anions within the waste stream including nitrate, nitrite, phosphate, carbonate, chromate, hydroxide, sulfate, and aluminate. The total sodium ion concentration was also determined independently by modeling inputs from on-line conductivity and density meters. In addition to the chemical information, this monitoring system provides immediate real-time data on the flow parameters, such as flow rate and temperature, and cumulative mass/volume of the retrieved waste stream. The components and analytical tools of the new process monitor can be tailored for a variety of complex mixtures in chemically harsh environments, such as pulp and paper processing liquids, electroplating solutions, and radioactive tank wastes. The developed monitoring system was tested for acceptability before it was deployed for use in Hanford Tank S-109 retrieval activities. The acceptance tests included performance inspection of hardware, software, and chemometric data analysis to determine the expected measurement accuracy for the different chemical species that are encountered during S-109 retrieval. (authors)

  20. Developing evidence-based prescriptive ventilation rate standards for commercial buildings in California: a proposed framework

    SciTech Connect (OSTI)

    Mendell, Mark J.; Fisk, William J.

    2014-02-01

    Background - The goal of this project, with a focus on commercial buildings in California, was to develop a new framework for evidence-based minimum ventilation rate (MVR) standards that protect occupants in buildings while also considering energy use and cost. This was motivated by research findings suggesting that current prescriptive MVRs in commercial buildings do not provide occupants with fully safe and satisfactory indoor environments. Methods - The project began with a broad review in several areas ? the diverse strategies now used for standards or guidelines for MVRs or for environmental contaminant exposures, current knowledge about adverse human effects associated with VRs, and current knowledge about contaminants in commercial buildings, including their their presence, their adverse human effects, and their relationships with VRs. Based on a synthesis of the reviewed information, new principles and approaches are proposed for setting evidence-based VRs standards for commercial buildings, considering a range of human effects including health, performance, and acceptability of air. Results ? A review and evaluation is first presented of current approaches to setting prescriptive building ventilation standards and setting acceptable limits for human contaminant exposures in outdoor air and occupational settings. Recent research on approaches to setting acceptable levels of environmental exposures in evidence-based MVR standards is also described. From a synthesis and critique of these materials, a set of principles for setting MVRs is presented, along with an example approach based on these principles. The approach combines two sequential strategies. In a first step, an acceptable threshold is set for each adverse outcome that has a demonstrated relationship to VRs, as an increase from a (low) outcome level at a high reference ventilation rate (RVR, the VR needed to attain the best achievable levels of the adverse outcome); MVRs required to meet each specific outcome threshold are estimated; and the highest of these MVRs, which would then meet all outcome thresholds, is selected as the target MVR. In a second step, implemented only if the target MVR from step 1 is judged impractically high, costs and benefits are estimated and this information is used in a risk management process. Four human outcomes with substantial quantitative evidence of relationships to VRs are identified for initial consideration in setting MVR standards. These are: building-related symptoms (sometimes called sick building syndrome symptoms), poor perceived indoor air quality, and diminished work performance, all with data relating them directly to VRs; and cancer and non-cancer chronic outcomes, related indirectly to VRs through specific VR-influenced indoor contaminants. In an application of step 1 for offices using a set of example outcome thresholds, a target MVR of 9 L/s (19 cfm) per person was needed. Because this target MVR was close to MVRs in current standards, use of a cost/benefit process seemed unnecessary. Selection of more stringent thresholds for one or more human outcomes, however, could raise the target MVR to 14 L/s (30 cfm) per person or higher, triggering the step 2 risk management process. Consideration of outdoor air pollutant effects would add further complexity to the framework. For balancing the objective and subjective factors involved in setting MVRs in a cost-benefit process, it is suggested that a diverse group of stakeholders make the determination after assembling as much quantitative data as possible.

  1. A Habit-Based Explanation of the Exchange Rate Risk Premium

    E-Print Network [OSTI]

    Verdelhan, Adrien Frederic

    This paper presents a model that reproduces the uncovered interest rate parity puzzle. Investors have preferences with external habits. Countercyclical risk premia and procyclical real interest rates arise endogenously. ...

  2. Bit-Rate Allocation for Multiple Video Streams Using a Pricing-Based Mechanism

    E-Print Network [OSTI]

    Tiwari, M.; Groves, T.; Cosman, P.

    2011-01-01

    functions, and a cen- tral allocator computes the appropriate bit-rate allocationRD Function for the Future Slots Bit-rate allocation forallocation, the al- locator has no information about user RD functions;

  3. Real-time system verification techniques based on abstraction/deduction and model checking

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Real-time system verification techniques based on abstraction/deduction and model checking Eun in or- der to obtain a powerful and highly automatic verification environment for real-time systems. One-Young.Kang@loria.fr Abstract. Our research focuses on verification techniques for real-time systems based on predicate

  4. Sampling-Based Direct Trajectory Generation Using the Minimum Time Cost Function

    E-Print Network [OSTI]

    Collins, Emmanuel

    Sampling-Based Direct Trajectory Generation Using the Minimum Time Cost Function Oscar Chuy for computationally efficient, direct trajectory generation using sampling with the minimum time cost function, where" (i.e, a rigorous lower bound on the chosen cost) based on the solution of a minimum time control

  5. An Efficient GPU-based Time Domain Solver for the Acoustic Wave Equation Ravish Mehraa,1

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    An Efficient GPU-based Time Domain Solver for the Acoustic Wave Equation Ravish Mehraa,1 , Nikunj of the acoustic wave equation for the purpose of room acoustics is presented. It is based on adaptive rectangular. Keywords: Time-domain wave equation solver, Room acoustics, GPU-based algorithms. 1. Introduction

  6. Electricity Rate Structures and the Economics of Solar PV: Could Mandatory Time-of-Use Rates Undermine California’s Solar Photovoltaic Subsidies?

    E-Print Network [OSTI]

    Borenstein, Severin

    2007-01-01

    residential customers in California are on ?at-rate tari?s that charge the same price for electricityelectricity prices that PG&E’s larger residential users face are well out of the norm both nationwide and historically in California.

  7. Translating Indian miniature paintings into a time-based medium 

    E-Print Network [OSTI]

    Vaidya, Aradhana

    2008-10-10

    the window, 32 and as we follow the bird we move up into the sky, where there a lot of colorful kites. Kites flying in the open skies symbolize freedom in contrast to the woman’s trapped condition. She truly aspires to freedom, like a bird or a kite.... Then we see a kite falling and continuing to fall until it gets stuck on a tree branch. By this time the woman is on her front terrace. On seeing the fluttering kite, she approaches and releases it. As we move closer to her face, we see a soft smile...

  8. Linearized inverse scattering based on seismic Reverse Time Migration

    E-Print Network [OSTI]

    Tim J. P. M. Op 't Root; Christiaan C. Stolk; Maarten V. de Hoop

    2011-01-21

    In this paper we study the linearized inverse problem associated with imaging of reflection seismic data. We introduce an inverse scattering transform derived from reverse-time migration (RTM). In the process, the explicit evaluation of the so-called normal operator is avoided, while other differential and pseudodifferential operator factors are introduced. We prove that, under certain conditions, the transform yields a partial inverse, and support this with numerical simulations. In addition, we explain the recently discussed 'low-frequency artifacts' in RTM, which are naturally removed by the new method.

  9. Offer Negotiations Worksheet Multiply the weight for each factor times the rating for each employer in meeting that factor, and then total

    E-Print Network [OSTI]

    Offer Negotiations Worksheet Multiply the weight for each factor times the rating for each employer in meeting that factor, and then total the scores to help evaluate each offer. FACTORS & (weights) EMPLOYER 1

  10. Assembly lead time reduction in a semiconductor capital equipment plant through constraint based scheduling

    E-Print Network [OSTI]

    Sedore, Blake William Clark

    2014-01-01

    The assembly protocols for a semiconductor capital equipment machine were analyzed for potential lead time reduction. The objective of this study was to determine the minimum assembly lead time for the machine based on the ...

  11. Persistence of Energy Efficiency Behaviors over Time: Evidence from a Community-Based Program

    E-Print Network [OSTI]

    Whitsett, Donna D PhD; Justus, Hannah C; Steiner, Ellen; Duffy, Kevin

    2013-01-01

    Persistence of Energy Efficiency Behaviors over Time:programs into utility energy efficiency program portfolios.of a community-based energy efficiency program showing

  12. Real Time (20 Second) Data Base Single Loop (Packed into 3 bytes)

    E-Print Network [OSTI]

    ) Data Base Single Loop (Packed into 3 bytes) ------------------------------------------- Data Element;------------------------------------------------------------------------- --- Real Time (20 Second) Data Base Station (Packed into 3 bytes Loops | 3 | [0]|Data Present, 0=No Data | |Scan Cnt| 11 | [0]|

  13. A Real-Time Reliability Model for Ontology-Based Dynamic Web Service Composition

    E-Print Network [OSTI]

    Xu, Haiping

    153 A Real-Time Reliability Model for Ontology-Based Dynamic Web Service Composition Harmeet Chawla--Ontology-based web service composition allows for integration of available web services in real-time to meet desired objectives. In order to evaluate the quality of composite web services at runtime, there is a pressing need

  14. Analytical, Wavelet and Frequency based Mathematical Models for Real-Time Rendering

    E-Print Network [OSTI]

    Columbia University

    Analytical, Wavelet and Frequency based Mathematical Models for Real-Time Rendering Bo Sun School of Arts and Sciences COLUMBIA UNIVERSITY 2008 #12;c 2008 Bo Sun All Rights Reserved #12;ABSTRACT Analytical, Wavelet and Frequency based Mathematical Models for Real-Time Rendering Bo Sun Real

  15. SIMULATION-BASED ANALYSIS OF TIMED REBECA USING TEPROP AND SQL

    E-Print Network [OSTI]

    Karlsson, Brynjar

    SIMULATION-BASED ANALYSIS OF TIMED REBECA USING TEPROP AND SQL Brynjar Magnússon Master of Science 1670-8539 #12;#12;Simulation-based Analysis of Timed Rebeca using TeProp and SQL by Brynjar Magnússon using TeProp and SQL Brynjar Magnússon June 2012 Abstract As software systems get larger, more complex

  16. A METHOD FOR IDENTIFYING REPETITION STRUCTURE IN MUSICAL AUDIO BASED ON TIME SERIES PREDICTION

    E-Print Network [OSTI]

    Dixon, Simon

    A METHOD FOR IDENTIFYING REPETITION STRUCTURE IN MUSICAL AUDIO BASED ON TIME SERIES PREDICTION This paper investigates techniques for determining the repeti- tion structure of musical audio. In particular. To this end, we propose a novel approach based on multivari- ate time series modelling of audio features

  17. The Case For Prediction-based Best-effort Real-time Systems

    E-Print Network [OSTI]

    The Case For Prediction-based Best-effort Real-time Systems Peter A. Dinda Bruce Lowekamp Loukas and Distributed Real- Time Systems (WPDRTS '99) Abstract We propose a prediction-based best-effort real significant examples, an earthquake visualization tool and a GIS map display tool, and show how they could

  18. Current dependence of spin torque switching rate based on Fokker-Planck approach

    SciTech Connect (OSTI)

    Taniguchi, Tomohiro Imamura, Hiroshi

    2014-05-07

    The spin torque switching rate of an in-plane magnetized system in the presence of an applied field is derived by solving the Fokker-Planck equation. It is found that three scaling currents are necessary to describe the current dependence of the switching rate in the low-current limit. The dependences of these scaling currents on the applied field strength are also studied.

  19. Topographically-Based Real-Time Traffic Anomaly Detection in a Metropolitan Highway System

    E-Print Network [OSTI]

    Grossman, Robert

    Topographically-Based Real-Time Traffic Anomaly Detection in a Metropolitan Highway System Rajmonda metropolitan area. Our Chicago Alert System (CAS) considers both the spatial and temporal aspects of the data of attack, the need for real-time traffic management is crucial. Real-time traffic management encompasses

  20. MEDICAL RATES for Active Employees

    E-Print Network [OSTI]

    New Mexico, University of

    -time, your base salary is calculated on the full-time equivalent. For example, if you are at an appointment percentage of 50% and earn $12,000 per year, your base salary is $24,000 and UNM would contribute 40%. UNM Health-Bi-Weekly Rates Annualized Salary $34,999 and below Annualized Salary $35,000 - $49,999 Annualized

  1. Regression-based estimates of the rate of accumulation of anthropogenic CO2 in the ocean: A fresh look

    E-Print Network [OSTI]

    Regression-based estimates of the rate of accumulation of anthropogenic CO2 in the ocean: A fresh February 2012 Available online 23 February 2012 Keywords: Carbon dioxide Regression MLR eMLR Regression and guidelines for improvement are presented. Following these guidelines leads to a local two- regression method

  2. Towards a Packet-based Control Theory -Part II: Rate Issues Ling Shi and Richard M. Murray

    E-Print Network [OSTI]

    Murray, Richard M.

    Towards a Packet-based Control Theory - Part II: Rate Issues Ling Shi and Richard M. Murray networked control structure. For details of classical information theory, readers are referred to [14], [4], [6] and for details of classical control theory, readers are referred to [10], [17], [3]. Networked

  3. revised for resubmission to IEEE Trans. on Pattern Analysis and Machine Intelligence Frame-Rate Spatial Referencing Based on Invariant

    E-Print Network [OSTI]

    Radke, Rich

    indexing, robust estimation, retinal imaging, ophthalmic image processing, biomedical image processing-Rate Spatial Referencing Based on Invariant Indexing and Alignment with Application to On-Line Retinal Image registration error in either case is about 1 pixel. Index terms: retinal laser surgery, registration, invariant

  4. STATE HEALTH PREMIUMS Note: Health rates are prorated based on FTE for salaried employees less than .75; OPS

    E-Print Network [OSTI]

    Zapletal, Jindrich

    STATE HEALTH PREMIUMS Note: Health rates are prorated based on FTE for salaried employees less than and PPO Plans Spouse Program 15.00 Health Investor HMO and PPO Plans Single 15.00 Health Investor HMO and PPO Plans Family 64.30 Health Investor HMO and PPO Plans Spouse Program 15.00 STATE HEALTH PREMIUMS

  5. A high sensitivity fiber optic macro-bend based gas flow rate transducer for low flow rates: Theory, working principle, and static calibration

    SciTech Connect (OSTI)

    Schena, Emiliano; Saccomandi, Paola; Silvestri, Sergio [Center for Integrated Research, Unit of Measurements and Biomedical Instrumentation, Universita Campus Bio-Medico di Roma, Via Alvaro del Portillo, 21, 00128 Rome (Italy)

    2013-02-15

    A novel fiber optic macro-bend based gas flowmeter for low flow rates is presented. Theoretical analysis of the sensor working principle, design, and static calibration were performed. The measuring system consists of: an optical fiber, a light emitting diode (LED), a Quadrant position sensitive Detector (QD), and an analog electronic circuit for signal processing. The fiber tip undergoes a deflection in the flow, acting like a cantilever. The consequent displacement of light spot center is monitored by the QD generating four unbalanced photocurrents which are function of fiber tip position. The analog electronic circuit processes the photocurrents providing voltage signal proportional to light spot position. A circular target was placed on the fiber in order to increase the sensing surface. Sensor, tested in the measurement range up to 10 l min{sup -1}, shows a discrimination threshold of 2 l min{sup -1}, extremely low fluid dynamic resistance (0.17 Pa min l{sup -1}), and high sensitivity, also at low flow rates (i.e., 33 mV min l{sup -1} up to 4 l min{sup -1} and 98 mV min l{sup -1} from 4 l min{sup -1} up to 10 l min{sup -1}). Experimental results agree with the theoretical predictions. The high sensitivity, along with the reduced dimension and negligible pressure drop, makes the proposed transducer suitable for medical applications in neonatal ventilation.

  6. NABERS: Lessons from 12 Years of Performance Based Ratings in Australia 

    E-Print Network [OSTI]

    Bannister, P.

    2012-01-01

    . The declaration of NABERS ratings has recently become mandatory for commercial sale and lease transactions over 2000m2. In this paper, the history of the NABERS scheme is outlined, with particular emphasis on the key lessons learnt and the underlying factors...

  7. IEEE INFOCOMM'99 1 Performance Evaluation of the RateBased Flow

    E-Print Network [OSTI]

    ­ naling to them their allowable transmission rate. The behavior of the source and destination is specified][14]. The behavior of the switches, however, is left to the designer of the switch. Several controllers have been by a single bot­ tleneck queue [5][16][19][22]. Bounds for the buffer occupancy are then computed for EFCI

  8. Laser-based irradiation apparatus and methods for monitoring the dose-rate response of semiconductor devices

    DOE Patents [OSTI]

    Horn, Kevin M. (Albuquerque, NM)

    2006-03-28

    A scanned, pulsed, focused laser irradiation apparatus can measure and image the photocurrent collection resulting from a dose-rate equivalent exposure to infrared laser light across an entire silicon die. Comparisons of dose-rate response images or time-delay images from before, during, and after accelerated aging of a device, or from periodic sampling of devices from fielded operational systems allows precise identification of those specific age-affected circuit structures within a device that merit further quantitative analysis with targeted materials or electrical testing techniques. Another embodiment of the invention comprises a broad-beam, dose rate-equivalent exposure apparatus. The broad-beam laser irradiation apparatus can determine if aging has affected the device's overall functionality. This embodiment can be combined with the synchronized introduction of external electrical transients into a device under test to simulate the electrical effects of the surrounding circuitry's response to a radiation exposure.

  9. Sub-Nyquist Rate Sampling Data Acquisition Systems Based on Compressive Sensing 

    E-Print Network [OSTI]

    Chen, Xi

    2012-07-16

    that are unique to CS are provided based on the analytical tools. Simulations with IBM 90nm CMOS process verify the theoretical derivations and the circuit implementations. Based on these results, it is shown that instantaneous receiver signal bandwidth of 1.5 GHz...

  10. Real-time impluse-based rigid body simulation and rendering 

    E-Print Network [OSTI]

    Yuksel, Can

    2007-09-17

    The purpose of this thesis is to develop and demonstrate a physically based rigid body simulation with a focus on simplifications to achieve real-time performance. This thesis aims to demonstrate that by improving the efficiency with simplified...

  11. Effective Reservoir Management Using Streamline-Based Reservoir Simulation, History Matching and Rate Allocation Optimization 

    E-Print Network [OSTI]

    Tanaka, Shusei

    2014-08-28

    . Streamline-based method uses snapshots of flow path of convective flow. Previous studies proved its applicability for convection dominated process such as waterflooding and tracer transport. However, for a case with gas injection with strong capillarity...

  12. REAL-TIME DEPTH BOUNDARY OPTIMIZATION FOR LOCAL AREA-BASED STEREO David Gallup1

    E-Print Network [OSTI]

    Pollefeys, Marc

    a snake-like energy optimized with a dynamic programming method. This clean-up step requires only O(#pixels) time and space, making it well-suited for real-time where local area-based stereo is often used. Our depth estimates are needed immediately, or for processing large amounts of data as in urban

  13. A test for second order stationarity of a time series based on the Discrete Fourier Transform

    E-Print Network [OSTI]

    Subba Rao, Suhasini

    A test for second order stationarity of a time series based on the Discrete Fourier Transform property, we construct a Portmanteau type test statistic for testing stationarity of the time series. It is shown that under the null of stationarity, the test statistic is approximately a chi square distribution

  14. AN E-BASED MIXED FORMULATION FOR A TIME-DEPENDENT EDDY CURRENT PROBLEM

    E-Print Network [OSTI]

    Rodríguez, Rodolfo

    AN E-BASED MIXED FORMULATION FOR A TIME-DEPENDENT EDDY CURRENT PROBLEM RAMIRO ACEVEDO, SALIM-quasistatic submodel usually called eddy current problem; see for instance [9, Chapter 8]. From the mathematical point this harmonic behavior, leading to the so-called time-harmonic eddy current problem. However, even in the case

  15. FPGA-Based Fuzzy Inference System for Real-time Embedded Applications

    E-Print Network [OSTI]

    FPGA-Based Fuzzy Inference System for Real-time Embedded Applications Dr. Kasim M. Al:- The traditional way of implementing algorithms in software limits the performance of real-time systems, since the data is processed serially. The new generation of FPGAs with embedded processors are attracting

  16. Real-Time Pricing for Demand Response Based on Stochastic Approximation

    E-Print Network [OSTI]

    Wong, Vincent

    1 Real-Time Pricing for Demand Response Based on Stochastic Approximation Pedram Samadi, Student to reduce their energy expenses. Keywords: Demand response, real-time pricing, PAR minimiza- tion, stochastic approximation, simultaneous perturbation. I. INTRODUCTION Demand response (DR) is an important

  17. Damage mechanisms identification of polymer based composite materials: time-frequency investigation of

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Damage mechanisms identification of polymer based composite materials: time-frequency investigation 2012, Nantes, France 2045 #12;Presented in this paper, a time-frequency damage characterization Emission (AE) signals by the Hilbert-Huang transform (HHT). It is to be noted that the study of damage

  18. TOWARDS REAL-TIME METADATA FOR SENSOR-BASED NETWORKS AND GEOGRAPHIC DATABASES

    E-Print Network [OSTI]

    Servigne, Sylvie

    TOWARDS REAL-TIME METADATA FOR SENSOR-BASED NETWORKS AND GEOGRAPHIC DATABASES C. Gutiérrez, S: Metadata, Sensor database, SpatioTemporal, Data Quality, GIS ABSTRACT: Nowadays, the geographic metadata of spatiotemporal data resulting from these sensors requires a definition of real- time metadata, especially

  19. Event History Based Sparse State Saving in Time Warp* Francesco Quaglia

    E-Print Network [OSTI]

    Tropper, Carl

    Event History Based Sparse State Saving in Time Warp* Francesco Quaglia Dipartimento di Informatica@dis.uniromal.it Abstract This paper presents a sparse state saving scheme for Time Warp parallel discrete event simulation with well known checkpointing schemes such as copy, sparse and incremental state saving (recently schemes

  20. Time-Based Storage Bandwidth Allocation in Hybrid Storage Systems Rice University

    E-Print Network [OSTI]

    Time-Based Storage Bandwidth Allocation in Hybrid Storage Systems Hui Wang Rice University Peter for a hybrid storage system made up of both HDs and SSDs. To continue the example, suppose the HD has slicing treats the storage system as a black box and dedicates the system to a client for its time slice

  1. A Wireless Internet-Based Observatory: The Real-time Coastal Observation Network

    E-Print Network [OSTI]

    A Wireless Internet-Based Observatory: The Real-time Coastal Observation Network (ReCON) S. A community and educational institutions through the internet. A real-time database management system provides to the success of regional coastal ocean observing systems. The pervasiveness of wireless internet technology

  2. Lyapunov based continuous-time nonlinear controller redesign for sampled-data implementation

    E-Print Network [OSTI]

    Nesic, Dragan

    Lyapunov based continuous-time nonlinear controller redesign for sampled-data implementation, 2004 Abstract: Given a continuous-time controller and a Lyapunov function that shows global asymptotic the sampling period T) of the Lyapunov difference for the sampled-data system with the redesigned controller

  3. Aalborg Universitet ARIMA-Based Time Series Model of Stochastic Wind Power Generation

    E-Print Network [OSTI]

    Bak-Jensen, Birgitte

    the nonstationarity and physical limits of stochastic wind power generation. The model is constructed based on wind power measurement of one year from the Nysted offshore wind farm in Denmark. The proposed limitedAalborg Universitet ARIMA-Based Time Series Model of Stochastic Wind Power Generation Chen, Peiyuan

  4. DAMAGE DETECTION IN A WIND TURBINE BLADE BASED ON TIME SERIES Simon Hoell, Piotr Omenzetter

    E-Print Network [OSTI]

    Boyer, Edmond

    DAMAGE DETECTION IN A WIND TURBINE BLADE BASED ON TIME SERIES METHODS Simon Hoell, Piotr Omenzetter (SHM) systems. Different methods have been developed for detection of damages in WT blades. However a damage detection method based on autocorrelations of response accelerations. The damage sensitive feature

  5. Fully adaptive FEM based fluorescence optical tomography from time-dependent measurements with area illumination

    E-Print Network [OSTI]

    Bangerth, Wolfgang

    Fully adaptive FEM based fluorescence optical tomography from time-dependent measurements with area fluorescence absorption map with an adaptive finite element based scheme. The tissue phantom consisted 785 nm diode laser light and a gain modulated image intensified charge coupled device camera

  6. On the effects of sampling rate and interpolation in HMM-based dynamic signature verification

    E-Print Network [OSTI]

    Autonoma de Madrid, Universidad

    . Politecnica Superior - Univ. Autonoma de Madrid C/ Francisco Tomas y Valiente, 11 - Campus de Cantoblanco are provided on the MCYT database com- prising 16,500 signatures from 330 subjects and as many skilled-based authentication. Automatic signature verifica- tion is still a challenging task, and many approaches have been

  7. Research on Pd film deposition rate calculation and simulation based on TiZrV/Pd film coating experiment

    E-Print Network [OSTI]

    Wang, Jie; Xu, Yanhui; Wang, Yong

    2015-01-01

    The vacuum chamber of accelerator storage ring need clean ultra-high vacuum environment. TiZrV getter film which was deposited on interior wall of vacuum chamber, can realize distributed pumping, effectively improve the vacuum degree and reduce the longitudinal gradient. But accumulation of pollutants such as N2, O2, will decrease the adsorption ability of non-evaporable getter (NEG), which leads to the reduction of NEG lifetime. Therefore, NEG thin film coated with a layer of Pd which has high diffusion rate and absorption ability for H2, can extend the service life of NEG, and improve the pumping rate of H2 at the same time. With argon as discharge gas, magnetron sputtering method was adopted to prepare TiZrV-Pd film in long straight pipe. According to the experimental results of the scanning electron microscope (SEM), deposition rates of TiZrV-Pd films were analyzed under different deposition parameters, the magnetic field strength, the gas flow rate, discharge current, discharge voltage and working pressu...

  8. Practical and fast quantum random number generation based on photon arrival time relative to external reference

    SciTech Connect (OSTI)

    Nie, You-Qi; Zhang, Jun Pan, Jian-Wei; Zhang, Hong-Fei; Wang, Jian; Zhang, Zhen; Ma, Xiongfeng

    2014-02-03

    We present a practical high-speed quantum random number generator, where the timing of single-photon detection relative to an external time reference is measured as the raw data. The bias of the raw data can be substantially reduced compared with the previous realizations. The raw random bit rate of our generator can reach 109 Mbps. We develop a model for the generator and evaluate the min-entropy of the raw data. Toeplitz matrix hashing is applied for randomness extraction, after which the final random bits are able to pass the standard randomness tests.

  9. Reservoir characterization based on tracer response and rank analysis of production and injection rates

    SciTech Connect (OSTI)

    Refunjol, B.T.; Lake, L.W.

    1997-08-01

    Quantification of the spatial distribution of properties is important for many reservoir-engineering applications. But, before applying any reservoir-characterization technique, the type of problem to be tackled and the information available should be analyzed. This is important because difficulties arise in reservoirs where production records are the only information for analysis. This paper presents the results of a practical technique to determine preferential flow trends in a reservoir. The technique is a combination of reservoir geology, tracer data, and Spearman rank correlation coefficient analysis. The Spearman analysis, in particular, will prove to be important because it appears to be insightful and uses injection/production data that are prevalent in circumstances where other data are nonexistent. The technique is applied to the North Buck Draw field, Campbell County, Wyoming. This work provides guidelines to assess information about reservoir continuity in interwell regions from widely available measurements of production and injection rates at existing wells. The information gained from the application of this technique can contribute to both the daily reservoir management and the future design, control, and interpretation of subsequent projects in the reservoir, without the need for additional data.

  10. A comparison of two lung clearance models based on the dissolution rates of oxidized depleted uranium 

    E-Print Network [OSTI]

    Crist, Kevin Craig

    1983-01-01

    qain inf'ormai. ion on the human risk associated with the inhalation of uranium oxide particles produced when firing anti-tank shells called penetrators, The penetrators are formed from uranium metal rods produced from a raw st'ock of uranium...A CUMRARISON Ul 1MD LUNG CLLARANCE MODEl S BASED ON THE OISSOLLlTION RA1FS OF OXIDIZED DErIETED URANIUM A The" is KEVIN CRAIG CRIST Submitt. ed to the Graduate Co11ege of Texas A 8 M University in parti a1 fu1fi 1 1men t of the requirement...

  11. Discrimination and Visualization of ELM Types Based on a Probabilistic Description of Inter-ELM Waiting Times

    E-Print Network [OSTI]

    Discrimination and Visualization of ELM Types Based on a Probabilistic Description of Inter-ELM Waiting Times

  12. New noise-based logic representations to avoid some problems with time complexity

    E-Print Network [OSTI]

    H. Wen; L. B. Kish; A. Klappenecker; F. Peper

    2012-01-07

    Instantaneous noise-based logic can avoid time-averaging, which implies significant potential for low-power parallel operations in beyond-Moore-law-chips. However, the universe (uniform superposition) will be zero with high probability (non-zero with exponentially low probability) in the random-telegraph-wave representation thus the operations with the universe would require exponential time-complexity. To fix this deficiency, we modify the amplitudes of the signals of the L and H states and achieve an exponential speedup compared to the old situation. Another improvement concerns the identification of a single product (hyperspace) state. We introduce a time shifted noise-based logic, which is constructed by shifting each reference signal with a small time delay. This modification implies an exponential speedup of single hyperspace vector identification compared to the former case and it requires the same, O(N) complexity as in quantum computing.

  13. Real-time capable first principle based modelling of tokamak turbulent transport

    E-Print Network [OSTI]

    Breton, S; Felici, F; Imbeaux, F; Aniel, T; Artaud, J F; Baiocchi, B; Bourdelle, C; Camenen, Y; Garcia, J

    2015-01-01

    A real-time capable core turbulence tokamak transport model is developed. This model is constructed from the regularized nonlinear regression of quasilinear gyrokinetic transport code output. The regression is performed with a multilayer perceptron neural network. The transport code input for the neural network training set consists of five dimensions, and is limited to adiabatic electrons. The neural network model successfully reproduces transport fluxes predicted by the original quasilinear model, while gaining five orders of magnitude in computation time. The model is implemented in a real-time capable tokamak simulator, and simulates a 300s ITER discharge in 10s. This proof-of-principle for regression based transport models anticipates a significant widening of input space dimensionality and physics realism for future training sets. This aims to provide unprecedented computational speed coupled with first-principle based physics for real-time control and integrated modelling applications.

  14. Thermoelastic study of nanolayered structures using time-resolved X-ray diffraction at high repetition rate

    SciTech Connect (OSTI)

    Navirian, H. A.; Schick, D. Leitenberger, W.; Bargheer, M.; Gaal, P.; Shayduk, R.

    2014-01-13

    We investigate the thermoelastic response of a nanolayered sample composed of a metallic SrRuO{sub 3} electrode sandwiched between a ferroelectric Pb(Zr{sub 0.2}Ti{sub 0.8})O{sub 3} film with negative thermal expansion and a SrTiO{sub 3} substrate. SrRuO{sub 3} is rapidly heated by fs-laser pulses with 208?kHz repetition rate. Diffraction of X-ray pulses derived from a synchrotron measures the transient out-of-plane lattice constant c of all three materials simultaneously from 120?ps to 5??s with a relative accuracy up to ?c/c?=?10{sup ?6}. The in-plane propagation of sound is essential for understanding the delayed out-of-plane compression of Pb(Zr{sub 0.2}Ti{sub 0.8})O{sub 3}.

  15. A software based, 13 kbits/s real-time internet codec 

    E-Print Network [OSTI]

    Randolph, Marc A

    1996-01-01

    . Quadrature Mirror Filters C. Polyphase quadrature mirror filters D. Infinite impulse response based QMF E. Subband choice SYSTEM DESIGN A. Overview. B. Quadrature Mirror Filter . . C. Speech coder 1. Predictor a. Pole-Zero predictor b. Pitch... Huffman code 29 38 VI Selected subband bit allocations . 40 VII Time spent filtering VIII Total delay time 41 47 LIST OF FIGURES FIGURE Page Block diagram of the ADPCM encoder Block diagram of the ADPCM decoder 13 Example speech samples 14...

  16. Extremum seeking-based optimization of high voltage converter modulator rise-time

    SciTech Connect (OSTI)

    Scheinker, Alexander; Bland, Michael; Krstic, Miroslav; Audia, Jeff

    2013-02-01

    We digitally implement an extremum seeking (ES) algorithm, which optimizes the rise time of the output voltage of a high voltage converter modulator (HVCM) at the Los Alamos Neutron Science Center (LANSCE) HVCM test stand by iteratively, simultaneously tuning the first 8 switching edges of each of the three phase drive waveforms (24 variables total). We achieve a 50 ?s rise time, which is reduction in half compared to the 100 ?s achieved at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Considering that HVCMs typically operate with an output voltage of 100 kV, with a 60Hz repetition rate, the 50 ?s rise time reduction will result in very significant energy savings. The ES algorithm will prove successful, despite the noisy measurements and cost calculations, confirming the theoretical results that the algorithm is not affected by noise whose frequency components are independent of the perturbing frequencies.

  17. Extremum seeking-based optimization of high voltage converter modulator rise-time

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

    Scheinker, Alexander; Bland, Michael; Krstic, Miroslav; Audia, Jeff

    2013-02-01

    We digitally implement an extremum seeking (ES) algorithm, which optimizes the rise time of the output voltage of a high voltage converter modulator (HVCM) at the Los Alamos Neutron Science Center (LANSCE) HVCM test stand by iteratively, simultaneously tuning the first 8 switching edges of each of the three phase drive waveforms (24 variables total). We achieve a 50 ?s rise time, which is reduction in half compared to the 100 ?s achieved at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Considering that HVCMs typically operate with an output voltage of 100 kV, with a 60Hz repetitionmore »rate, the 50 ?s rise time reduction will result in very significant energy savings. The ES algorithm will prove successful, despite the noisy measurements and cost calculations, confirming the theoretical results that the algorithm is not affected by noise whose frequency components are independent of the perturbing frequencies.« less

  18. A Novel Priority-Slot Based Continuous-Time Formulation for Crude-Oil Scheduling Problems

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    A Novel Priority-Slot Based Continuous-Time Formulation for Crude-Oil Scheduling Problems Sylvain, France E-mail: grossmann@cmu.edu October 2008 Abstract The optimal scheduling of crude-oil operations be used to solve the crude-oil operations problem introduced by Lee et al. 1 . It is different from

  19. Time Variability-Based Hierarchic Recognition of Multiple Musical Instruments in Recordings

    E-Print Network [OSTI]

    Ras, Zbigniew W.

    Chapter 15 Time Variability-Based Hierarchic Recognition of Multiple Musical Instruments in this chapter is focused on automatic identifica- tion of musical instruments in polyphonic audio recordings pres- ence or absence of a target instrument. Feature set includes parameters describing frame

  20. A FIRST ORDER PROJECTION-BASED TIME-SPLITTING SCHEME FOR COMPUTING CHEMICALLY REACTING FLOWS

    E-Print Network [OSTI]

    A FIRST ORDER PROJECTION-BASED TIME-SPLITTING SCHEME FOR COMPUTING CHEMICALLY REACTING FLOWS, surface catalytic reactors for methane to methanol conversion and chemical vapor deposition (CVD) process ANDREAS PROHL1 Abstract. The simulation of chemically reacting ows in speci#12;c situations is a basic

  1. Toward Real-Time Simulation of Physics Based Lithium-Ion Battery Models

    E-Print Network [OSTI]

    Subramanian, Venkat

    Toward Real-Time Simulation of Physics Based Lithium-Ion Battery Models Venkat R. Subramanian Technological University, Cookeville, Tennessee 38505, USA Recent interest in lithium-ion batteries for electric on the computational efficiency of lithium-ion battery models. This paper presents an effective approach to simulate

  2. Efficient Block-Based Parameterized Timing Analysis Covering All Potentially Critical Paths

    E-Print Network [OSTI]

    Najm, Farid N.

    Efficient Block-Based Parameterized Timing Analysis Covering All Potentially Critical Paths Khaled in the parameter space, by reporting all paths that can become critical. Using an efficient pruning algorithm, only) but by knowledge of the paths that can become critical at nearby points in parameter space. We give a formal

  3. Optimal Real-time Pricing Algorithm Based on Utility Maximization for Smart Grid

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Optimal Real-time Pricing Algorithm Based on Utility Maximization for Smart Grid Pedram Samadi algorithm for the future smart grid. We focus on the interactions between the smart meters and the energy-mail:{psamadi, hamed, rschober, vincentw, jurij}@ece.ubc.ca Abstract--In this paper, we consider a smart power infras

  4. NUMERICAL SOLUTION OF RESERVOIR FLOW MODELS BASED ON LARGE TIME STEP OPERATOR SPLITTING ALGORITHMS

    E-Print Network [OSTI]

    NUMERICAL SOLUTION OF RESERVOIR FLOW MODELS BASED ON LARGE TIME STEP OPERATOR SPLITTING ALGORITHMS. Special focus is posed on the numerical solution algorithms for the saturation equation, which. The general background for the reservoir ow model is reviewed, and the main features of the numerical

  5. NUMERICAL SOLUTION OF RESERVOIR FLOW MODELS BASED ON LARGE TIME STEP OPERATOR SPLITTING ALGORITHMS

    E-Print Network [OSTI]

    NUMERICAL SOLUTION OF RESERVOIR FLOW MODELS BASED ON LARGE TIME STEP OPERATOR SPLITTING ALGORITHMS focus is posed on the numerical solution algorithms for the saturation equation, which is a convection­ eral background for the reservoir flow model is reviewed, and the main features of the numerical

  6. Delay-Based Controller Design for Continuous-Time and Hybrid Applications

    E-Print Network [OSTI]

    Murray, Richard M.

    results on delay-based controller design, we propose a digital-control scheme that can implement every://www.cds.caltech.edu/~murray/papers/lsm10-tac.html #12;2 structure of the controller being designed for a large-scale system. This problem been developed for the analysis and synthesis of time- delay control systems in the continuous

  7. Real-Time Model-Based Fault Diagnosis for Switching Power Converters

    E-Print Network [OSTI]

    Sanders, Seth

    demonstration for a 1.2 kW rack-level uninterruptable power supply (UPS) dc-dc converter for data center for a 1.2 kW rack- level uninterruptable power supply (UPS) dc-dc converter for data center applicationsReal-Time Model-Based Fault Diagnosis for Switching Power Converters Jason Poon, Ioannis C

  8. Discrete-time Lyapunov based small-gain theorem for parameterized interconnected ISS systems

    E-Print Network [OSTI]

    Nesic, Dragan

    Discrete-time Lyapunov based small-gain theorem for parameterized interconnected ISS systems Dina via the Lyapunov method. In particular, an ISS Lyapunov function for the overall system is constructed from the ISS Lyapunov functions of the two subsystems. We consider parameterized families of discrete

  9. 1. Event Structuring as a General Approach to Building Knowledge in Time-Based Collections

    E-Print Network [OSTI]

    Ras, Zbigniew W.

    Ribarsky The University of North Carolina at Charlotte Zachary Wartell The University of North Carolina at Charlotte Wenwen Dou The University of North Carolina at Charlotte Keywords Time-based data collections sequence forms a narrative, or story. Such stories are powerful me- chanisms for human understanding

  10. A Real-time Integration of Concept-based Search and Summarization on Chinese Websites

    E-Print Network [OSTI]

    engine, and an automatic summarizer. When the user enters one or more fairly general and vague terms query structure. They prefer limiting their searches to one or a simple list of terms, while seekingA Real-time Integration of Concept-based Search and Summarization on Chinese Websites Joe F Zhou

  11. COMET: A Component-Based Real-Time Database for Automotive Systems Dag Nystrom

    E-Print Network [OSTI]

    COMET: A Component-Based Real-Time Database for Automotive Systems Dag Nystr¨om , Aleksandra With the increase of complexity in automotive control systems, the amount of data that needs to be managed is also-constrained automotive control systems, denoted the COMET development suit. Using software engineer- ing tools to assist

  12. Spatio-temporal precipitation modeling based on time-varying regressions Oleg Makhnin

    E-Print Network [OSTI]

    Borchers, Brian

    Spatio-temporal precipitation modeling based on time-varying regressions Oleg Makhnin Department on monthly precipitation data from gauge measurements. The model accounts for orographic effects in northern New Mexico. We assess spatio-temporal variability and also trace the dependence of precipitation

  13. Robust Timing Synchronization for AC-OFDM Based Optical Wireless Communications

    E-Print Network [OSTI]

    Ranjha, Bilal A; Kavehrad, Mohsen; Deng, Peng

    2015-01-01

    Visible light communications (VLC) have recently attracted a growing interest and can be a potential solution to realize indoor wireless communication with high bandwidth capacity for RF-restricted environments such as airplanes and hospitals. Optical based orthogonal frequency division multiplexing (OFDM) systems have been proposed in the literature to combat multipath distortion and intersymbol interference (ISI) caused by multipath signal propagation. In this paper, we present a robust timing synchronization scheme suitable for asymmetrically clipped (AC) OFDM based optical intensity modulated direct detection (IM/DD) wireless systems. Our proposed method works perfectly for ACO-OFDM, Pulse amplitude modulated discrete multitone (PAM-DMT) and discrete Hartley transform (DHT) based optical OFDM systems. In contrast to existing OFDM timing synchronization methods which are either not suitable for AC OFDM techniques due to unipolar nature of output signal or perform poorly, our proposed method is suitable for...

  14. Holographic imaging based on time-domain data of natural-fiber-containing materials

    DOE Patents [OSTI]

    Bunch, Kyle J.; McMakin, Douglas L.

    2012-09-04

    Methods and apparatuses for imaging material properties in natural-fiber-containing materials can utilize time-domain data. In particular, images can be constructed that provide quantified measures of localized moisture content. For example, one or more antennas and at least one transceiver can be configured to collect time-domain data from radiation interacting with the natural-fiber-containing materials. The antennas and the transceivers are configured to transmit and receive electromagnetic radiation at one or more frequencies, which are between 50 MHz and 1 THz, according to a time-domain impulse function. A computing device is configured to transform the time-domain data to frequency-domain data, to apply a synthetic imaging algorithm for constructing a three-dimensional image of the natural-fiber-containing materials, and to provide a quantified measure of localized moisture content based on a pre-determined correlation of moisture content to frequency-domain data.

  15. A Cosmic Ray Test Platform Based on the High Time Resolution MRPC Technology

    E-Print Network [OSTI]

    Tianxiang Chen; Cheng Li; Yongjie Sun; Hongfang Chen; Ming Shao; Zebo Tang; Rongxing Yang; Yi Zhou; Yifei Zhang

    2015-03-13

    In order to test the performance of detector/prototype in environment of laboratory, we design and build a larger area ($90\\times52$ $cm^2$) test platform of cosmic ray based on well-designed Multi-gap Resistive Plate Chamber (MRPC) with an excellent time resolution and a high detection efficiency for the minimum ionizing particles (MIPs). The time resolution of the MRPC module used is tested to be ~80 ps, and the position resolution along the strip is ~5 mm, while the position resolution perpendicular to the strip is ~12.7 mm. The platform constructed by four MRPC modules can be functional for tracking the cosmic rays with a spatial resolution ~6.3 mm, and provide a reference time ~40 ps.

  16. The Halpha Luminosity Function and Star Formation Rate at z~0.24 Based on Subaru Deep Imaging Data

    E-Print Network [OSTI]

    S. S. Fujita; M. Ajiki; Y. Shioya; T. Nagao; T. Murayama; Y. Taniguchi; K. Umeda; S. Yamada; M. Yagi; S. Okamura; Y. Komiyama

    2003-02-24

    We have carried out a deep imaging survey for H$\\alpha$ emitting galaxies at $z\\approx$0.24 using a narrowband filter tuned with the redshifted line. The total sky area covered is 706 arcmin$^2$ within a redshift range from 0.234 to 0.252 ($\\delta z$=0.018). This corresponds to a volume of 3.9$\\times10^3$ Mpc$^3$ when $\\Omega_{\\rm matter}=0.3$, $\\Omega_\\Lambda=0.7$, and $H_{\\mathrm{0}}$=70 km s$^{-1}$ Mpc$^{-1}$ are adopted. We obtain a sample of 348 H$\\alpha$ emitting galaxies whose observed emission-line equivalent widths are greater than 12 \\AA. We find an extinction-corrected H$\\alpha$ luminosity density of $10^{39.65^{+0.08}_{-0.12}}$ ergs s$^{-1}$ Mpc$^{-3}$. Using the Kennicutt relation between the H$\\alpha$ luminosity and star formation rate, the star formation rate density in the covered volume is estimated as $0.036^{+0.006}_{-0.012}$ $M_{\\sun}$ yr$^{-1}$ Mpc$^{-3}$. This value is higher by a factor of 3 than the local SFR density.

  17. Space-Time Models based on Random Fields with Local Interactions

    E-Print Network [OSTI]

    Dionissios T. Hristopulos; Ivi C. Tsantili

    2015-03-06

    The analysis of space-time data from complex, real-life phenomena requires the use of flexible and physically motivated covariance functions. In most cases, it is not possible to explicitly solve the equations of motion for the fields or the respective covariance functions. In the statistical literature, covariance functions are often based on mathematical constructions. We propose deriving space-time covariance functions by solving "effective equations of motion", which can be used as statistical representations of systems with diffusive behavior. In particular, we propose using the linear response theory to formulate space-time covariance functions based on an equilibrium effective Hamiltonian. The effective space-time dynamics are then generated by a stochastic perturbation around the equilibrium point of the classical field Hamiltonian leading to an associated Langevin equation. We employ a Hamiltonian which extends the classical Gaussian field theory by including a curvature term and leads to a diffusive Langevin equation. Finally, we derive new forms of space-time covariance functions.

  18. In-Line-Test of Variability and Bit-Error-Rate of HfOx-Based Resistive Memory

    E-Print Network [OSTI]

    Ji, B L; Ye, Q; Gausepohl, S; Deora, S; Veksler, D; Vivekanand, S; Chong, H; Stamper, H; Burroughs, T; Johnson, C; Smalley, M; Bennett, S; Kaushik, V; Piccirillo, J; Rodgers, M; Passaro, M; Liehr, M

    2015-01-01

    Spatial and temporal variability of HfOx-based resistive random access memory (RRAM) are investigated for manufacturing and product designs. Manufacturing variability is characterized at different levels including lots, wafers, and chips. Bit-error-rate (BER) is proposed as a holistic parameter for the write cycle resistance statistics. Using the electrical in-line-test cycle data, a method is developed to derive BERs as functions of the design margin, to provide guidance for technology evaluation and product design. The proposed BER calculation can also be used in the off-line bench test and build-in-self-test (BIST) for adaptive error correction and for the other types of random access memories.

  19. Time-Sensitive Utility-Based Routing in Duty-Cycle Wireless Sensor Networks with Unreliable Links

    E-Print Network [OSTI]

    Wu, Jie

    Time-Sensitive Utility-Based Routing in Duty-Cycle Wireless Sensor Networks with Unreliable Links}@ustc.edu.cn Abstract--Utility-based routing is a special routing approach, which takes the reliability and transmission costs into account at the same time. However, the existing utility-based routing algorithms have not yet

  20. Improving the Effectiveness of Time-Based Display Advertising DANIEL G. GOLDSTEIN and R. PRESTON MCAFEE and SIDDHARTH SURI,

    E-Print Network [OSTI]

    Fiat, Amos

    Improving the Effectiveness of Time-Based Display Advertising DANIEL G. GOLDSTEIN and R. PRESTON MCAFEE and SIDDHARTH SURI, Yahoo! Research Display advertisements are typically sold by the impression is more exact than one based solely on impressions, time- based advertising may become an industry

  1. Dose uncertainty due to computed tomography ,,CT... slice thickness in CT-based high dose rate brachytherapy of the prostate cancer

    E-Print Network [OSTI]

    Pouliot, Jean

    brachytherapy of the prostate cancer Yongbok Kim,a) I-Chow Joe Hsu, Etienne Lessard, and Jean Pouliot Department tomography CT -based high dose rate HDR brachytherapy, the uncertainty in the localization in Medicine. DOI: 10.1118/1.1785454 Key words: high dose rate brachytherapy, computed tomography, prostate

  2. What is Wind Chill Temperature? It is the temperature it "feels like" outside and is based on the rate of heat loss

    E-Print Network [OSTI]

    What is Wind Chill Temperature? It is the temperature it "feels like" outside and is based on the rate of heat loss from exposed skin caused by the effects of wind and cold. As the wind increases, the body is cooled at a faster rate causing the skin temperature to drop. Wind Chill does not impact

  3. 2304 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 55, NO. 5, MAY 2009 Service-Outage-Based Power and Rate Control for

    E-Print Network [OSTI]

    Franceschetti, Massimo

    2304 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 55, NO. 5, MAY 2009 Service-Outage-Based Power is considered. For a fixed basic rate r0, a service outage occurs when the instantaneous transmission rate falls to peak and average trans- mitter power constraints and a constraint on the service outage probability

  4. Lie algebra solution of population models based on time-inhomogeneous Markov chains

    E-Print Network [OSTI]

    House, Thomas

    2011-01-01

    Many natural populations are well modelled through time-inhomogeneous stochastic processes. Such processes have been analysed in the physical sciences using a method based on Lie algebras, but this methodology is not widely used for models with ecological, medical and social applications. This paper presents the Lie algebraic method, and applies it to three biologically well motivated examples. The result of this is a solution form that is often highly computationally advantageous.

  5. Method and computer product to increase accuracy of time-based software verification for sensor networks

    DOE Patents [OSTI]

    Foo Kune, Denis (Saint Paul, MN); Mahadevan, Karthikeyan (Mountain View, CA)

    2011-01-25

    A recursive verification protocol to reduce the time variance due to delays in the network by putting the subject node at most one hop from the verifier node provides for an efficient manner to test wireless sensor nodes. Since the software signatures are time based, recursive testing will give a much cleaner signal for positive verification of the software running on any one node in the sensor network. In this protocol, the main verifier checks its neighbor, who in turn checks its neighbor, and continuing this process until all nodes have been verified. This ensures minimum time delays for the software verification. Should a node fail the test, the software verification downstream is halted until an alternative path (one not including the failed node) is found. Utilizing techniques well known in the art, having a node tested twice, or not at all, can be avoided.

  6. SU-E-J-158: Experimental Investigation of Proton Radiography Based On Time-Resolved Dose Measurements

    SciTech Connect (OSTI)

    Testa, M; Paganetti, H; Lu, H-M [Massachusetts General Hospital ' Harvard Medical School, Boston, MA (United States); Doolan, P [University College London (United Kingdom); H, Bentefour E [IBA, Warrenville, IL (United States)

    2014-06-01

    Purpose: To use proton radiography for i) in-vivo range verification of the brain fields of medulloblastoma patients in order to reduce the exit dose to the cranial skin and thus the risk of permanent alopecia; ii) for performing patient specific optimization of the calibration from CT-Hounsfield units to proton relative stopping power in order to minimize uncertainties of proton rang Methods: We developed and tested a prototype proton radiography system based on a single-plane scintillation screen coupled with a fast CCD camera (1ms sampling rate, 0.29x0.29 mm{sup 2} pixel size, 30×30 cm{sup 2} field of view). The method is based on the principle that, for passively scattered beams, the radiological depth of any point in the plateau of a spread-out Bragg-Peak (SOBP) can be inferred from the time-pattern of the dose rate measurements. We performed detector characterization measurements using complex-shape homogeneous phantoms and an Alderson phanto Results: Detector characterization tests confirmed the robustness of the technique. The results of the phantom measurements are encouraging in terms of achievable accuracy of the water equivalent thickness. A technique to minimize the degradation of spatial resolution due to multiple Coulomb scattering is discussed. Our novel radiographic technique is rapid (100 ms) and simultaneous over the whole field. The dose required to produce one radiograph, with the current settings, is ?3 cG Conclusion: The results obtained with this simple and innovative radiography method are promising and motivate further development of technique. The system requires only a single-plane 2D dosimeter and it uses the clinical beam for a fraction of second with low dose to the patient.

  7. Model-based testing for space-time interaction using point processes: An application to psychiatric hospital admissions in an urban area

    E-Print Network [OSTI]

    Meyer, Sebastian; Rössler, Wulf; Held, Leonhard

    2015-01-01

    Spatio-temporal interaction is inherent to cases of infectious diseases and occurrences of earthquakes, whereas the spread of other events, such as cancer or crime, is less evident. Statistical significance tests of space-time clustering usually assess the correlation between the spatial and temporal (transformed) distances of the events. Although appealing through simplicity, these classical tests do not adjust for the underlying population nor can they account for a distance decay of interaction. We propose to use the framework of an endemic-epidemic point process model to jointly estimate a background event rate explained by seasonal and areal characteristics, as well as a superposed epidemic component representing the hypothesis of interest. We illustrate this new model-based test for space-time interaction by analysing psychiatric inpatient admissions in Zurich, Switzerland (2007-2012). Several socio-economic factors were found to be associated with the admission rate, but there was no evidence of genera...

  8. Residential Customer Enrollment in Time-based Rate and Enabling Technology Programs: Smart Grid Investment Grant Consumer Behavior Study Analysis

    E-Print Network [OSTI]

    Todd, Annika

    2014-01-01

    2011 Assessment of Demand Response & Advanced Metering:Critical Peak Rebate – A demand response program that paysthe benefits from customer demand response enabled by these

  9. Interim Report on Consumer Acceptance, Retention, and response to Time-based rates from the Consumer Behavior Studies

    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 RankADVANCED MANUFACTURING OFFICE INDUSTRIALU.S. Department of Energy |June 2015 Interim Report on Impacts

  10. A GIS-based Estimate of Net Erosion Rate for Semi-arid Watersheds in New Mexico Richardson, C.P.1

    E-Print Network [OSTI]

    Cal, Mark P.

    A GIS-based Estimate of Net Erosion Rate for Semi-arid Watersheds in New Mexico Richardson, C.P.1 subsequent management for beneficial use. GIS-based modeling and evaluation is another tool to evaluate-basin of the Rio Puerco basin to the Rio Grande. Objective The objective of this work is to utilize a GIS platform

  11. A New Class of Multivariate Public Key Cryptosystems Constructed Based on Random Pseudo Cyclic Codes, K(XIII)SE(2)PKC, Realizing Coding Rate

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    A New Class of Multivariate Public Key Cryptosystems Constructed Based on Random Pseudo Cyclic present a new class of multivariate public-key cryptosystems, K(XIII)SE(2)PKC realizing the coding rate. Keyword Public key cryptosystem, Error-correcting code, Code based PKC, Cyclic code, Multivariate PKC, Gr

  12. Bayesian based design of real-time sensor systems for high-risk indoor contaminants

    SciTech Connect (OSTI)

    Sreedharan, Priya; Sreedharan, Priya

    2007-12-01

    The sudden release of toxic contaminants that reach indoor spaces can be hazardousto building occupants. To respond effectively, the contaminant release must be quicklydetected and characterized to determine unobserved parameters, such as release locationand strength. Characterizing the release requires solving an inverse problem. Designinga robust real-time sensor system that solves the inverse problem is challenging becausethe fate and transport of contaminants is complex, sensor information is limited andimperfect, and real-time estimation is computationally constrained.This dissertation uses a system-level approach, based on a Bayes Monte Carloframework, to develop sensor-system design concepts and methods. I describe threeinvestigations that explore complex relationships among sensors, network architecture,interpretation algorithms, and system performance. The investigations use data obtainedfrom tracer gas experiments conducted in a real building. The influence of individual sensor characteristics on the sensor-system performance for binary-type contaminant sensors is analyzed. Performance tradeoffs among sensor accuracy, threshold level and response time are identified; these attributes could not be inferred without a system-level analysis. For example, more accurate but slower sensors are found to outperform less accurate but faster sensors. Secondly, I investigate how the sensor-system performance can be understood in terms of contaminant transport processes and the model representation that is used to solve the inverse problem. The determination of release location and mass are shown to be related to and constrained by transport and mixing time scales. These time scales explain performance differences among different sensor networks. For example, the effect of longer sensor response times is comparably less for releases with longer mixing time scales. The third investigation explores how information fusion from heterogeneous sensors may improve the sensor-system performance and offset the need for more contaminant sensors. Physics- and algorithm-based frameworks are presented for selecting and fusing information from noncontaminant sensors. The frameworks are demonstrated with door-position sensors, which are found to be more useful in natural airflow conditions, but which cannot compensate for poor placement of contaminant sensors. The concepts and empirical findings have the potential to help in the design of sensor systems for more complex building systems. The research has broader relevance to additional environmental monitoring problems, fault detection and diagnostics, and system design.

  13. Time-resolved imaging with OKE-based time-gate: enhancement in spatial resolution using low-coherence ultra-short illumination

    E-Print Network [OSTI]

    Purwar, Harsh; Rozé, Claude; Blaisot, Jean-Bernard

    2015-01-01

    We propose a collinear optical Kerr effect (OKE) based time-gate configuration with low coherence illumination source, derived from the supercontinuum (SC) generated by focusing the femtosecond laser pulses inside water. At first the spectral broadening in SC generation and corresponding changes in its coherence properties are studied and then a narrow band of wavelengths is extracted to use as the probe beam in the OKE-based time-gate configuration. The gate timings and spatial resolution of the time-gated images are also investigated. The low coherence of the probe ensures that the artifacts due to speckles from the laser are reduced to a minimum. To illustrate this a comparison of the time-resolved images of the fuel sprays obtained with this configuration has been made with the images obtained with the collinear, dual color configuration of the optical gate with coherent illumination.

  14. Time-resolved fuel injector flow characterisation based on 3D laser Doppler vibrometry

    E-Print Network [OSTI]

    Crua, Cyril

    2015-01-01

    In order to enable investigations of the fuel flow inside unmodified injectors, we have developed a new experimental approach to measure time-resolved vibration spectra of diesel nozzles using a three dimensional laser vibrometer. The technique we propose is based on the triangulation of the vibrometer and fuel pressure transducer signals, and enables the quantitative characterisation of quasi-cyclic internal flows without requiring modifications to the injector, the working fluid, or limiting the fuel injection pressure. The vibrometer, which uses the Doppler effect to measure the velocity of a vibrating object, was used to scan injector nozzle tips during the injection event. The data were processed using a discrete Fourier transform to provide time-resolved spectra for valve-closed-orifice, minisac and microsac nozzle geometries, and injection pressures ranging from 60 to 160MPa, hence offering unprecedented insight into cyclic cavitation and internal mechanical dynamic processes. A peak was consistently f...

  15. An architecture for real time circle detection based on the Hough transform 

    E-Print Network [OSTI]

    Salem, Sanjay S.

    1992-01-01

    ) Hosame Abu-Amara (Member) , L~tr4+m'~gyy N. Kehtarnav (Member) . C. Jenkins (Member) J. W. Howze (Head of Department) May 1992 ABSTRACT An Architecture for Real Time Circle Detection Based on the Hough Transform. (1UIay 1992) Sanjay S Salem... Segmentation B. Image processing architectures 1. Parallel Architectures 2. Serial Architecture C. Overview of the Thesis I 2 2 4 5 6 7 8 THEORETICAL BACKGROUND 10 A. EIough transform 1. Line detection using Hough Transform . 2. Circle detection...

  16. A Data-Centric Approach to Optimize Time in Workflow-Based Business Process Yuqun Zhang, Dewayne E. Perry

    E-Print Network [OSTI]

    Perry, Dewayne E.

    A Data-Centric Approach to Optimize Time in Workflow-Based Business Process Yuqun Zhang, Dewayne E to optimize it in workflow- based business processes. By applying our data-centric business process modeling-time performance, data-centric, business process optimization I. INTRODUCTION In the realm of business process

  17. 1822 IEEE TRANSACTIONS ON SMART GRID, VOL. 3, NO. 4, DECEMBER 2012 Real-Time Price-Based Demand Response

    E-Print Network [OSTI]

    Fu, Yong

    , real-time price-based demand response management, residential appli- ances, robust optimization1822 IEEE TRANSACTIONS ON SMART GRID, VOL. 3, NO. 4, DECEMBER 2012 Real-Time Price-Based Demand Response Management for Residential Appliances via Stochastic Optimization and Robust Optimization Zhi Chen

  18. High Efficiency and High Rate Deposited Amorphous Silicon-Based Solar Cells: Final Technical Report, 1 September 2001--6 March 2005

    SciTech Connect (OSTI)

    Deng, X.

    2006-01-01

    The objectives for the University of Toledo are to: (1) establish a transferable knowledge and technology base for fabricating high-efficiency triple-junction a-Si-based solar cells, and (2) develop high-rate deposition techniques for the growing a-Si-based and related alloys, including poly-Si, c-Si, a-SiGe, and a-Si films and photovoltaic devices with these materials.

  19. Developing Embedded/Real-Time and Cyber-Physical Systems: Functional Reactive Programming, RTL-based Formal Verification, Response Time

    E-Print Network [OSTI]

    Cheng, Albert M. K.

    of such systems. In battery-operated real-time systems such as sensors in a CPS, conserving energy is of critical between battery recharges or energy-harvesting. This tutorial covers the following topics: (1 in Computer Science, graduating Phi Beta Kappa at age 19, the M.S. in Computer Science with a minor

  20. 1258 IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. 32, NO. 7, JULY 2013 GPU-Based Real-Time Volumetric Ultrasound

    E-Print Network [OSTI]

    Khuri-Yakub, Butrus T. "Pierre"

    1258 IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. 32, NO. 7, JULY 2013 GPU-Based Real-Time Volumetric-time volumetric imaging with a ring array, a particularly at- tractive geometry in intracardiac and intravascular), maximum intensity pro- jection (MIP), real-time imaging, ring array, ultrasound imaging, volumetric

  1. Stochastic Model Based Proxy Servers Architecture for VoD to Achieve Reduced Client Waiting Time

    E-Print Network [OSTI]

    Nair, T R GopalaKrishnan

    2010-01-01

    In a video on demand system, the main video repository may be far away from the user and generally has limited streaming capacities. Since a high quality video's size is huge, it requires high bandwidth for streaming over the internet. In order to achieve a higher video hit ratio, reduced client waiting time, distributed server's architecture can be used, in which multiple local servers are placed close to clients and, based on their regional demands video contents are cached dynamically from the main server. As the cost of proxy server is decreasing and demand for reduced waiting time is increasing day by day, newer architectures are explored, innovative schemes are arrived at. In this paper we present novel 3 layer architecture, includes main multimedia server, a Tracker and Proxy servers. This architecture targets to optimize the client waiting time. We also propose an efficient prefix caching and load sharing algorithm at the proxy server to allocate the cache according to regional popularity of the video...

  2. Real-time Shape-based Particle Separation and Detailed In-situ Particle Shape Characterization

    SciTech Connect (OSTI)

    Beranek, Josef; Imre, D.; Zelenyuk, Alla

    2012-02-07

    Particle shape is an important attribute that is very difficult to characterize. We present a new portable system that offers, for the first time, the opportunity to separate particles with different shapes and characterize their chemical and physical properties, including their dynamic shape factors (DSFs) in the transition and free-molecular regimes, with high precision, in-situ, and in real-time. The system uses a new generation aerosol particle mass analyzer (APM) to classify particles based on their masses and transport them to a differential mobility analyzer (DMA) that is used to select particles of one charge, one mass, and one shape. These highly uniform particles are ready for use and/or characterization by any application or analytical tool. We combine APM and DMA with our single particle mass spectrometer, SPLAT II, to form the ADS, and demonstrate its utility to measure in real-time individual particle compositions and vacuum aerodynamic diameters to yield, for each selected shape, particle DSFs in two flow regimes. We apply the ADS to characterize aspherical ammonium sulfate and NaCl particles and show that both particle types have wide distribution of particle shapes with DSFs from nearly 1 to 1.5.

  3. Hacking energy-time entanglement-based systems with classical light

    E-Print Network [OSTI]

    Jonathan Jogenfors; Ashraf M. Elhassan; Johan Ahrens; Mohamed Bourennane; Jan-Åke Larsson

    2014-11-26

    Photonic systems based on energy-time entanglement have been proposed to test local realism using the Bell inequality. A violation of this inequality normally also certifies security of device-independent quantum key distribution, so that an attacker cannot eavesdrop or control the system. Here, we show how this security test can be circumvented in energy-time entangled systems when using standard avalanche photodetectors, allowing an attacker to compromise the system without leaving a trace. With tailored pulses of classical light we reach Bell values up to 3.63 at 97.6% detector efficiency which is an extreme violation. This is the first demonstration of a violation-faking source that both gives tunable violation and high detector efficiency. The implications are severe: the standard Clauser-Horne-Shimony-Holt inequality cannot be used to show device-independent security for standard postselecting energy-time entanglement setups. We conclude with suggestions of improved tests and experimental setups that can re-establish device-independent security.

  4. Real-time Bacterial Detection by Single Cell Based Sensors UsingSynchrotron FTIR Spectromicroscopy

    SciTech Connect (OSTI)

    Veiseh, Mandana; Veiseh, Omid; Martin, Michael C.; Bertozzi,Carolyn; Zhang, Miqin

    2005-08-10

    Microarrays of single macrophage cell based sensors weredeveloped and demonstrated for real time bacterium detection bysynchrotron FTIR microscopy. The cells were patterned on gold-SiO2substrates via a surface engineering technique by which the goldelectrodes were immobilized with fibronectin to mediate cell adhesion andthe silicon oxide background were passivated with PEG to resist proteinadsorption and cell adhesion. Cellular morphology and IR spectra ofsingle, double, and triple cells on gold electrodes exposed tolipopolysaccharide (LPS) of different concentrations were compared toreveal the detection capabilities of these biosensors. The single-cellbased sensors were found to generate the most significant IR wave numbervariation and thus provide the highest detection sensitivity. Changes inmorphology and IR spectrum for single cells exposed to LPS were found tobe time- and concentration-dependent and correlated with each other verywell. FTIR spectra from single cell arrays of gold electrodes withsurface area of 25 mu-m2, 100 mu-m2, and 400 mu-m2 were acquired usingboth synchrotron and conventional FTIR spectromicroscopes to study thesensitivity of detection. The results indicated that the developedsingle-cell platform can be used with conventional FTIRspectromicroscopy. This technique provides real-time, label-free, andrapid bacterial detection, and may allow for statistic and highthroughput analyses, and portability.

  5. Symmetric Ternary Quantum Homomorphic Encryption Schemes Based on the Ternary Quantum One-Time Pad

    E-Print Network [OSTI]

    Yuqi Wang; Kun She; Qingbin Luo; Fan Yang; Chao Zhao

    2015-05-12

    Aiming at a ternary quantum logic circuit, four symmetric ternary quantum homomorphic encryption schemes, based on ternary quantum one-time protocol, were presented. First, for a one-qutrit rotation gate, a homomorphic quantum encryption scheme was constructed. Second, in view of the synthesis of a 3x3 general unitary transformation, another one-qutrit quantum homomorphic encryption scheme was proposed. Third, according to the one-qutrit scheme, the two-qutrit quantum homomorphic encryption scheme about GCX(m') gate was constructed and was further generalized to the n-qutrit unitary matrix case. Finally, the security of these schemes was analyzed from two perspectives. It could be concluded that the attacker can correctly guess the encryption key with a maximum probability ${p_k} = {1 \\mathord{\\left/ {\\vphantom {1 {{3^{3n}}}}} \\right. \\kern-\

  6. Optimization Based Data Mining Approah for Forecasting Real-Time Energy Demand

    SciTech Connect (OSTI)

    Omitaomu, Olufemi A; Li, Xueping; Zhou, Shengchao

    2015-01-01

    The worldwide concern over environmental degradation, increasing pressure on electric utility companies to meet peak energy demand, and the requirement to avoid purchasing power from the real-time energy market are motivating the utility companies to explore new approaches for forecasting energy demand. Until now, most approaches for forecasting energy demand rely on monthly electrical consumption data. The emergence of smart meters data is changing the data space for electric utility companies, and creating opportunities for utility companies to collect and analyze energy consumption data at a much finer temporal resolution of at least 15-minutes interval. While the data granularity provided by smart meters is important, there are still other challenges in forecasting energy demand; these challenges include lack of information about appliances usage and occupants behavior. Consequently, in this paper, we develop an optimization based data mining approach for forecasting real-time energy demand using smart meters data. The objective of our approach is to develop a robust estimation of energy demand without access to these other building and behavior data. Specifically, the forecasting problem is formulated as a quadratic programming problem and solved using the so-called support vector machine (SVM) technique in an online setting. The parameters of the SVM technique are optimized using simulated annealing approach. The proposed approach is applied to hourly smart meters data for several residential customers over several days.

  7. Real-time data acquisition and telemetry based irrigation control system

    DOE Patents [OSTI]

    Slater, John M.; Svoboda, John M.

    2005-12-13

    A data acquisition and telemetry based control system for use in facilitating substantially real time management of an agricultural irrigation system. The soil moisture sensor includes a reader and a plurality of probes. The probes each include an electronic circuit having a moisture sensing capacitor in operative communication with the soil whose moisture is to be measured. Each probe also includes a receive/transmit antenna and the reader includes a transmit/receive antenna, so that as the reader passes near the probe, the reader transmits a digital excitation signal to the electronic circuit of the biodegradable probe via an inductive couple formed between the transmit/receive antenna of the reader and the receive/transmit coil of the probe. The electronic circuit uses an energy component of the excitation signal to generate a digital data signal which indicates the moisture content of the soil adjacent to the moisture sensing capacitor. The probe sends the data signal to the reader which then uses the data signal to develop a corresponding set of watering instructions which are then transmitted to a control module in communication with the irrigation system. The control module sends corresponding control signals to nozzles of the irrigation system causing the irrigation system to disperse water in a manner consistent with the moisture content data transmitted by the probes to the reader. Because the irrigation system moves continuously through the field to be irrigated, the moisture content data acquisition and resultant water dispersal by the irrigation system occur substantially in real time.

  8. Risk-based evaluation of Allowed Outage Times (AOTs) considering risk of shutdown

    SciTech Connect (OSTI)

    Mankamo, T.; Kim, I.S.; Samanta, P.K.

    1992-12-31

    When safety systems fail during power operation, Technical Specifications (TS) usually limit the repair within Allowed Outage Time (AOT). If the repair cannot be completed within the AOT, or no AOT is allowed, the plant is required to be shut down for the repair. However, if the capability to remove decay heat is degraded, shutting down the plant with the need to operate the affected decay-heat removal systems may impose a substantial risk compared to continued power operation over a usual repair time. Thus, defining a proper AOT in such situations can be considered as a risk-comparison between the repair in frill power state with a temporarily increased level of risk, and the altemative of shutting down the plant for the repair in zero power state with a specific associated risk. The methodology of the risk-comparison approach, with a due consideration of the shutdown risk, has been further developed and applied to the AOT considerations of residual heat removal and standby service water systems of a boiling water reactor (BWR) plant. Based on the completed work, several improvements to the TS requirements for the systems studied can be suggested.

  9. Risk-based evaluation of Allowed Outage Times (AOTs) considering risk of shutdown

    SciTech Connect (OSTI)

    Mankamo, T. ); Kim, I.S.; Samanta, P.K. )

    1992-01-01

    When safety systems fail during power operation, Technical Specifications (TS) usually limit the repair within Allowed Outage Time (AOT). If the repair cannot be completed within the AOT, or no AOT is allowed, the plant is required to be shut down for the repair. However, if the capability to remove decay heat is degraded, shutting down the plant with the need to operate the affected decay-heat removal systems may impose a substantial risk compared to continued power operation over a usual repair time. Thus, defining a proper AOT in such situations can be considered as a risk-comparison between the repair in frill power state with a temporarily increased level of risk, and the altemative of shutting down the plant for the repair in zero power state with a specific associated risk. The methodology of the risk-comparison approach, with a due consideration of the shutdown risk, has been further developed and applied to the AOT considerations of residual heat removal and standby service water systems of a boiling water reactor (BWR) plant. Based on the completed work, several improvements to the TS requirements for the systems studied can be suggested.

  10. Laser-based irradiation apparatus and method to measure the functional dose-rate response of semiconductor devices

    DOE Patents [OSTI]

    Horn, Kevin M. (Albuquerque, NM)

    2008-05-20

    A broad-beam laser irradiation apparatus can measure the parametric or functional response of a semiconductor device to exposure to dose-rate equivalent infrared laser light. Comparisons of dose-rate response from before, during, and after accelerated aging of a device, or from periodic sampling of devices from fielded operational systems can determine if aging has affected the device's overall functionality. The dependence of these changes on equivalent dose-rate pulse intensity and/or duration can be measured with the apparatus. The synchronized introduction of external electrical transients into the device under test can be used to simulate the electrical effects of the surrounding circuitry's response to a radiation exposure while exposing the device to dose-rate equivalent infrared laser light.

  11. Time interval measurement device based on surface acoustic wave filter excitation, providing 1 ps precision and stability

    SciTech Connect (OSTI)

    Panek, Petr; Prochazka, Ivan [Institute of Photonics and Electronics, Academy of Sciences of the Czech Republic, Chaberska 57, 182 51 Prague (Czech Republic)

    2007-09-15

    This article deals with the time interval measurement device, which is based on a surface acoustic wave (SAW) filter as a time interpolator. The operating principle is based on the fact that a transversal SAW filter excited by a short pulse can generate a finite signal with highly suppressed spectra outside a narrow frequency band. If the responses to two excitations are sampled at clock ticks, they can be precisely reconstructed from a finite number of samples and then compared so as to determine the time interval between the two excitations. We have designed and constructed a two-channel time interval measurement device which allows independent timing of two events and evaluation of the time interval between them. The device has been constructed using commercially available components. The experimental results proved the concept. We have assessed the single-shot time interval measurement precision of 1.3 ps rms that corresponds to the time of arrival precision of 0.9 ps rms in each channel. The temperature drift of the measured time interval on temperature is lower than 0.5 ps/K, and the long term stability is better than {+-}0.2 ps/h. These are to our knowledge the best values reported for the time interval measurement device. The results are in good agreement with the error budget based on the theoretical analysis.

  12. A Comprehensive Statistically-Based Method to Interpret Real-Time Flowing Measurements

    SciTech Connect (OSTI)

    Pinan Dawkrajai; Keita Yoshioka; Analis A. Romero; Ding Zhu; A.D. Hill; Larry W. Lake

    2005-10-01

    This project is motivated by the increasing use of distributed temperature sensors for real-time monitoring of complex wells (horizontal, multilateral and multi-branching wells) to infer the profiles of oil, gas, and water entry. Measured information can be used to interpret flow profiles along the wellbore including junction and build section. In this second project year, we have completed a forward model to predict temperature and pressure profiles in complex wells. As a comprehensive temperature model, we have developed an analytical reservoir flow model which takes into account Joule-Thomson effects in the near well vicinity and multiphase non-isothermal producing wellbore model, and couples those models accounting mass and heat transfer between them. For further inferences such as water coning or gas evaporation, we will need a numerical non-isothermal reservoir simulator, and unlike existing (thermal recovery, geothermal) simulators, it should capture subtle temperature change occurring in a normal production. We will show the results from the analytical coupled model (analytical reservoir solution coupled with numerical multi-segment well model) to infer the anomalous temperature or pressure profiles under various conditions, and the preliminary results from the numerical coupled reservoir model which solves full matrix including wellbore grids. We applied Ramey's model to the build section and used an enthalpy balance to infer the temperature profile at the junction. The multilateral wellbore temperature model was applied to a wide range of cases varying fluid thermal properties, absolute values of temperature and pressure, geothermal gradients, flow rates from each lateral, and the trajectories of each build section.

  13. Daily Time Step Simulation with a Priority Order Based Surface Water Allocation Model 

    E-Print Network [OSTI]

    Hoffpauir, Richard James

    2011-02-22

    Surface water availability models often use monthly simulation time steps for reasons of data availability, model parameter parsimony, and reduced computational time. Representing realistic streamflow variability, ...

  14. Evaluation of Response Time in Ethernet-based Automation Systems Galle Marsal, Bruno Denis, Jean-Marc Faure

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    design of automation systems including this kind of industrial Ethernet networks. 1. Introduction ManyEvaluation of Response Time in Ethernet-based Automation Systems Gaëlle Marsal, Bruno Denis, Jean@eit.uni-kl.de Abstract This paper presents a method to assess response time of automation system architectures including

  15. Abstract--A cam-based, shear force actuated electromechanical valve drive system offering variable valve timing in internal

    E-Print Network [OSTI]

    Perreault, Dave

    1 Abstract--A cam-based, shear force actuated electromechanical valve drive system offering variable valve timing in internal combustion engines was previously proposed and demonstrated. To transform, optimal cam design, nonlinear friction model, variable valve timing. I. INTRODUCTION espite their simple

  16. A test for second order stationarity of a time series based on the Discrete Fourier Transform -Technical report

    E-Print Network [OSTI]

    Subba Rao, Suhasini

    A test for second order stationarity of a time series based on the Discrete Fourier Transform stationary. Exploiting this important property, we construct a Portmanteau type test statistic for testing stationarity of the time series. It is shown that under the null of stationarity, the test statistic has

  17. PUSHING THE LIMITS OF GROUND-BASED PHOTOMETRIC PRECISION: SUBMILLIMAGNITUDE TIME-SERIES PHOTOMETRY OF THE OPEN CLUSTER NGC 6791

    E-Print Network [OSTI]

    Gaudi, B. Scott

    PUSHING THE LIMITS OF GROUND-BASED PHOTOMETRIC PRECISION: SUBMILLIMAGNITUDE TIME-SERIES PHOTOMETRY of this study was to demonstrate the ability to obtain very high precision photometry for a large number to obtain high-precision (millimagnitude, or less than 1%) time-series, optical and infrared photometry

  18. MIDWEST ISO CO-OPTIMIZATION BASED REAL-TIME DISPATCH AND PRICING OF ENERGY AND ANCILLARY SERVICES

    E-Print Network [OSTI]

    McCalley, James D.

    MIDWEST ISO CO-OPTIMIZATION BASED REAL-TIME DISPATCH AND PRICING OF ENERGY AND ANCILLARY SERVICES and ancillary service co-optimization is reported in this paper. The key components of Midwest ISO's real words ­ Real-time dispatch and pricing, LMP, Energy and ancillary service co-optimization, Intra

  19. Mesoscale variability in time series data: Satellite-based estimates for the U.S. JGOFS Bermuda Atlantic

    E-Print Network [OSTI]

    Mesoscale variability in time series data: Satellite-based estimates for the U.S. JGOFS Bermuda TOPEX/Poseidon­ERS-1/2) are used to characterize, statistically, the mesoscale variability about the U to better understand the contribution of mesoscale eddies to the time series record and the model- data

  20. An Event-Based Service Framework for Learning, Querying, and Monitoring Multivariate Time Series

    E-Print Network [OSTI]

    Lin, Jessica

    University, 4400 University Drive MSN 4A5, Fairfax, Virginia 22030-4422, United States {cngan, brodsky rates, and monthly price indices to analyze different states of stock markets. In medical studies pressure and pulse anomalies on electrocardiogram, as well as low birth but high death rates in a #12

  1. A mm-Scale Dosimetry System Based on Optically Stimulated Luminescence of Beryllium Oxide for Investigation of Dose Rate Profiles in Constricted Environments - 12219

    SciTech Connect (OSTI)

    Sommer, Marian; Jahn, Axel; Sommer, Dora; Henniger, Juergen [Technische Universitaet Dresden, Institute for Nuclear and Particle Physics, Radiation Physics Group, D-01062 Dresden (Germany); Praetorius, Reiner M. [Wiederaufarbeitungsanlage Karlsruhe Rueckbau- und Entsorgungs- GmbH, POB 1263, D-76339 Eggenstein-Leopoldshafen (Germany)

    2012-07-01

    The dismantling of the former German fuel reprocessing research center Wiederaufbeitungsanlage Karlsruhe requires extensive investigations of contamination and dose rate inside of the shielded areas. Particularly for first the exploration of radiation field existing thermo-element pipes may offer access to the tanks and to other interesting points without the risk of contamination. Because of their small dimension, almost no active dosimetry systems are able to measure inside the pipes. New mm-scale luminescence dosimeters in combination with a packing and transport technique are presented. The dosimeters could measure doses from 0.1 mGy up to more than 100 Gy. Hence, over the possible exposure time durations, dose rates from ?Gyh{sup -1} up to 1000 Gyh{sup -1} are ascertainable. For potential users the system opens the opportunity for investigation of dose rates inside of shielding and in contaminated environments. Particularly in constricted environments the technique is a unique solution for dose and dose rate measurement tasks. Within the linear dose range up to several ten Gy, the uncertainty of the results is less than 5%. 100 Gy-doses can be specified within 20%, with individual high dose calibration of the detectors even better. For WAK and other potential users the system offers the opportunity to investigate dose rates inside of shieldings and in contaminated environments. Particularly in constricted environments the technique is an unique solution for dose and dose rate measurements. (authors)

  2. Implementing very high-speed hierarchical MLP-based classification systems in real-time industrial environments

    E-Print Network [OSTI]

    Masulli, Francesco

    Implementing very high-speed hierarchical MLP-based classification systems in real-time industrial-Perceptron-based "tree architecture" even in very high-speed industrial classification problems. In particular, the paper 64 input ­ 128 hidden ­ 64 output MLP on-chip), it has been possible to build an industrial board

  3. *Only available to employees who live outside of Massachusetts Rates are based on your full-time equivalent salary. If you work part-time, your deduction will be based on your full-time equivalent salary.

    E-Print Network [OSTI]

    Dorf, Martin E.

    Plan (HUGHP) POS $688.62 $548.65 $139.96 Harvard Pilgrim Health Care POS $707.08 $526.20 $180 Health Plan (HUGHP) POS $255.69 $203.31 $52.38 Harvard Pilgrim Health Care POS $261.23 $195.35 $65 used to reach the threshold, and those above the threshold, must be from a Harvard HMO, POS or PPO

  4. False Negative Rates of a Macrofoam-Swab Sampling Method with Low Surface Concentrations of Two Bacillus anthracis Surrogates via Real-Time PCR

    SciTech Connect (OSTI)

    Hutchison, Janine R.; Piepel, Gregory F.; Amidan, Brett G.; Sydor, Michael A.; Deatherage Kaiser, Brooke L

    2015-05-01

    Surface sampling for Bacillus anthracis spores has traditionally relied on detection via bacterial cultivation methods. Although effective, this approach does not provide the level of organism specificity that can be gained through molecular techniques. False negative rates (FNR) and limits of detection (LOD) were determined for two B. anthracis surrogates with modified rapid viability-polymerase chain reaction (mRV-PCR) following macrofoam-swab sampling. This study was conducted in parallel with a previously reported study that analyzed spores using a plate-culture method. B. anthracis Sterne (BAS) or B. atrophaeus Nakamura (BG) spores were deposited onto four surface materials (glass, stainless steel, vinyl tile, and plastic) at nine target concentrations (2 to 500 spores/coupon; 0.078 to 19.375 colony-forming units [CFU] per cm²). Mean FNR values for mRV-PCR analysis ranged from 0 to 0.917 for BAS and 0 to 0.875 for BG and increased as spore concentration decreased (over the concentrations investigated) for each surface material. FNRs based on mRV-PCR data were not statistically different for BAS and BG, but were significantly lower for glass than for vinyl tile. FNRs also tended to be lower for the mRV-PCR method compared to the culture method. The mRV-PCR LOD?? was lowest for glass (0.429 CFU/cm² with BAS and 0.341 CFU/cm² with BG) and highest for vinyl tile (0.919 CFU/cm² with BAS and 0.917 CFU/cm² with BG). These mRV-PCR LOD?? values were lower than the culture values (BAS: 0.678 to 1.023 CFU/cm² and BG: 0.820 to 1.489 CFU/cm²). The FNR and LOD?? values reported in this work provide guidance for environmental sampling of Bacillus spores at low concentrations.

  5. Semiconductor-based all-optical switching for optical time-division multiplexed networks

    E-Print Network [OSTI]

    Robinson, Bryan S. (Bryan Shawn), 1975-

    2003-01-01

    All-optical switching will likely be required for future optical networks operating at data rates which exceed electronic processing speeds. Switches utilizing nonlinearities in semiconductor optical amplifiers (SOA) are ...

  6. Concatenative Text-to-Speech Synthesis Based on Prototype Waveform Interpolation (A Time Frequency Approach) 

    E-Print Network [OSTI]

    Morais, Edmilson; Taylor, Paul; Violaro, Fabio

    This paper presents some preliminary methods to apply the Time- Frequency Interpolation technique - TFI [3] to concatenative text-to-speech synthesis. The TFI technique described here is a pitch-synchronous time-frequency ...

  7. The Design of a Synthesis Tool for Interrupt-based Real Time Embedded Software

    E-Print Network [OSTI]

    Hsiung, Pao-Ann

    to accomplish some dedicated set of periodic tasks within real time deadlines. Some examples include avionics Thermometer with Microcontroller (DTM) and a Real-time Stepping Motor Control (RSMC) to demonstrate

  8. Model based approach to UXO imaging using the time domain electromagnetic method

    SciTech Connect (OSTI)

    Lavely, E.M.

    1999-04-01

    Time domain electromagnetic (TDEM) sensors have emerged as a field-worthy technology for UXO detection in a variety of geological and environmental settings. This success has been achieved with commercial equipment that was not optimized for UXO detection and discrimination. The TDEM response displays a rich spatial and temporal behavior which is not currently utilized. Therefore, in this paper the author describes a research program for enhancing the effectiveness of the TDEM method for UXO detection and imaging. Fundamental research is required in at least three major areas: (a) model based imaging capability i.e. the forward and inverse problem, (b) detector modeling and instrument design, and (c) target recognition and discrimination algorithms. These research problems are coupled and demand a unified treatment. For example: (1) the inverse solution depends on solution of the forward problem and knowledge of the instrument response; (2) instrument design with improved diagnostic power requires forward and inverse modeling capability; and (3) improved target recognition algorithms (such as neural nets) must be trained with data collected from the new instrument and with synthetic data computed using the forward model. Further, the design of the appropriate input and output layers of the net will be informed by the results of the forward and inverse modeling. A more fully developed model of the TDEM response would enable the joint inversion of data collected from multiple sensors (e.g., TDEM sensors and magnetometers). Finally, the author suggests that a complementary approach to joint inversions is the statistical recombination of data using principal component analysis. The decomposition into principal components is useful since the first principal component contains those features that are most strongly correlated from image to image.

  9. Rate Schedules

    Broader source: Energy.gov [DOE]

    One of the major responsibilities of Southeastern is to design, formulate, and justify rate schedules. Repayment studies prepared by the agency determine revenue requirements and appropriate rate...

  10. Physics-based Predictive Time Propagation Method for Monte Carlo Coupled Depletion Simulations 

    E-Print Network [OSTI]

    Johns, Jesse Merlin

    2014-12-18

    t Time v Neutron velocity x Solution vector C Delayed neutron precursor concentration Cx Fitting coefficient D Diffusion coefficient E Energy J Neutron surface current L Loss operator vi M Nuclide transmutation operator N Nuclide density matrix N Nuclide... neutron flux ? Neutron yield energy distribution ? Difference operator ? Macroscopic interaction probability ? Solid angle of neutron travel Subscripts d Delayed neutron f Fission neutron interaction vii f Final time i, k,m, n Nuclide index i Time step...

  11. Recent Advances in Wave Travel Time Based Methodology for Structural Health Monitoring

    E-Print Network [OSTI]

    Southern California, University of

    identify wave velocity profiles of vertically propagating shear and torsional waves through the building monitoring, seismic interferometry, wave travel time 1. INTRODUCTION The ability to monitor the health

  12. Determination of welding fume size with time using E7018 electrodes and A131B base metal 

    E-Print Network [OSTI]

    Owen, Richard James

    1976-01-01

    DETERMINATION OF WELDING FUME SIZE WITH TIME USING E7018 ELECTRODES AND A131B BASE METAL A Thesis by RICHARD JAMES OWEN Submitted to the Graduate College of Texas AILM University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE December 1976 Major Subject: Industrial Hygiene DETERMINATION OF WELDING FUME SIZE WITH TIME USING E7018 ELECTRODES AND Al 318 BASE METAL A Thesis by RICHARD JAMES OWEN Approved as to style and content by: Cha&rman of Comm t ad...

  13. 4A.5 DERIVING TURBULENT KINETIC ENERGY DISSIPATION RATE WITHIN CLOUDS USING GROUND BASED 94 GHZ RADAR

    E-Print Network [OSTI]

    Reading, University of

    is to perform spectral analysis on air- craft data (for instance Gultepe and Starr (1995)) or from ground based distribution of the optical and microphysics properties. Turbulence is also directly linked to the life cycle to having the property that their sum is proportional to the TKE the two variances

  14. Reel-to-Reel Characterization of Time-Based Phase Evolution in YBCO Coated Conductors

    E-Print Network [OSTI]

    and Renewable Energy as part of a DOE program to develop electric power technology Pioneering Science of conversion time with identical processing history. · Examine sample with R2R XRD and Raman. Pioneering" of YBCO · YBCO converted for various amounts of time under fixed processing conditions AND history: ­ 1

  15. Fuzzy adaptive connection admission control for real-time applications in ATM-based heterogeneous networks 

    E-Print Network [OSTI]

    Zhang, Ying-Bi

    1997-01-01

    of network is popular lately due to their cost-effectiveness, high bandwidth, and scalability. For real-time applications, the most crucial quality of service is to meet deadline requirement which means timely and correct message delivery within the pre...

  16. Dynamic Line Rating: Research and Policy Evaluation

    SciTech Connect (OSTI)

    Jake P. Gentle; Kurt S. Myers; Michael R. West

    2014-07-01

    Dynamic Line Rating (DLR) is a smart grid technology that allows the rating of electrical conductors to be increased based on local weather conditions. Overhead lines are conventionally given a conservative rating based on worst case scenarios. We demonstrate that observing the conditions in real time leads to additional capacity and safer operation. This paper provides a report of a pioneering scheme in the United States of America in which DLR has been applied. Thereby, we demonstrate that observing the local weather conditions in real time leads to additional capacity and safer operation. Secondly, we discuss limitations involved. In doing so, we arrive at novel insights which will inform and improve future DLR projects. Third, we provide a policy background and discussion to clarify the technology’s potential and identifies barriers to the imminent adoption of dynamic line rating systems. We provide suggestions for regulatory bodies about possible improvements in policy to encourage adoption of this beneficial technology.

  17. Bayesian based design of real-time sensor systems for high-risk indoor contaminants

    E-Print Network [OSTI]

    Sreedharan, Priya

    2007-01-01

    the influence of occupant behavior (Klepeis and Nazaroff,the influence of occupant behavior on room airflow patternslibrary based on occupant behavior and weather conditions.

  18. Guidance on the Use of Hand-Held Survey Meters for radiological Triage: Time-Dependent Detector Count Rates Corresponding to 50, 250, and 500 mSv Effective Dose for Adult Males and Adult Females

    SciTech Connect (OSTI)

    Bolch, W.E. [University of Florida; Hurtado, J.L. [University of Florida; Lee, C. [University of Florida; Manger, Ryan P [ORNL; Hertel, Nolan [Georgia Institute of Technology; Burgett, E. [Georgia Institute of Technology; Dickerson, W. [Armed Force Radiobiological Research Institute

    2012-01-01

    In June 2006, the Radiation Studies Branch of the Centers for Disease Control and Prevention held a workshop to explore rapid methods of facilitating radiological triage of large numbers of potentially contaminated individuals following detonation of a radiological dispersal device. Two options were discussed. The first was the use of traditional gamma cameras in nuclear medicine departments operated as makeshift wholebody counters. Guidance on this approach is currently available from the CDC. This approach would be feasible if a manageable number of individuals were involved, transportation to the relevant hospitals was quickly provided, and the medical staff at each facility had been previously trained in this non-traditional use of their radiopharmaceutical imaging devices. If, however, substantially larger numbers of individuals (100 s to 1,000 s) needed radiological screening, other options must be given to first responders, first receivers, and health physicists providing medical management. In this study, the second option of the workshop was investigated by the use of commercially available portable survey meters (either NaI or GM based) for assessing potential ranges of effective dose (G50, 50Y250, 250Y500, and 9500 mSv). Two hybrid computational phantoms were used to model an adult male and an adult female subject internally contaminated with 241Am, 60Cs, 137Cs, 131I, or 192Ir following an acute inhalation or ingestion intake. As a function of time following the exposure, the net count rates corresponding to committed effective doses of 50, 250, and 500 mSv were estimated via Monte Carlo radiation transport simulation for each of four different detector types, positions, and screening distances. Measured net count rates can be compared to these values, and an assignment of one of four possible effective dose ranges could be made. The method implicitly assumes that all external contamination has been removed prior to screening and that the measurements be conducted in a low background, and possibly mobile, facility positioned at the triage location. Net count rate data are provided in both tabular and graphical format within a series of eight handbooks available at the CDC website (http://www.bt.cdc.gov/radiation/clinicians/evaluation).

  19. Real-time EEG processing based on Wavelet Transformation T. Malina, A. Folkers and U.G. Hofmann

    E-Print Network [OSTI]

    Lübeck, Universität zu

    - time in their respective energy bands. Due to constraints in DSP-based computing power, we have brain waves to command input devices [1]. However, physiological research at our university [4], strongly suggests that the macroscopic electric (i.e. EEG) state of a subject's brain influences

  20. Flood management in a complex river basin with a real-time decision support system based on hydrological forecasts

    E-Print Network [OSTI]

    Lenstra, Arjen K.

    ENAC/ Flood management in a complex river basin with a real-time decision support system based System MINDS proposes the optimal hydropower plants management for flood peak reduction PREDICTING FLOODS for population safety and! Computational program: Routing System MINERVE Run-off model Infiltration model

  1. Real-time implementation of a vision based automatic push button 

    E-Print Network [OSTI]

    Rajkotwala, Farida

    1996-01-01

    This thesis presents a real-time digital signal Processing (DSP) system to detect the presence of pedestrians waiting to cross an intersection. Such a system would improve both pedestrian and vehicle flow considering that ...

  2. Reliable GPS-Based Timing for Power Systems: A Multi-Layered Multi-Receiver Architecture

    E-Print Network [OSTI]

    Gao, Grace Xingxin

    measurement unit (PMU), also known as synchrophasor, is a device capable of measuring power system voltage a victim receiver's reported position, time, or both. In a future scenario where PMU data play

  3. Single photon continuous variable quantum key distribution based on energy-time uncertainty relation

    E-Print Network [OSTI]

    Bing Qi

    2006-02-20

    In previous quantum key distribution (QKD) protocols, information is encoded on either the discrete-variable of single-photon signal or continuous-variables of multi-photon signal. Here, we propose a new QKD protocol by encoding information on continuous-variables of a single photon. In this protocol, Alice randomly encodes her information on either the central frequency of a narrow-band single photon pulse or the time-delay of a broadband single photon pulse, while Bob randomly chooses to do either frequency measurement or time measurement. The security of this protocol rests on the energy-time uncertainty relation, which prevents Eve from simultaneously determining both frequency and time information with arbitrarily high resolution. In practice, this scheme may be more robust against various channel noises, such as polarization and phase fluctuations.

  4. A Maximum Likelihood Method with Penalty to Estimate Link Travel Time Based on Trip Itinerary Data 

    E-Print Network [OSTI]

    Zhong, Chujun

    2014-12-15

    Travel time is an important network performance measure. It is a challenging subject due to the fluctuations in traffic characteristics, such as traffic flow. This study proposes a maximum likelihood method with penalty ...

  5. ?LED-based Single-Wavelength Bi-directional POF Link with 10 Gb/s Aggregate Data Rate

    E-Print Network [OSTI]

    Li, X.; Bamiedakis, N.; Wei, J. L.; McKendry, J. J. D.; Xie, E.; Ferreira, R.; Gu, E.; Dawson, M. D.; Penty, R. V.; White, I. H.

    2015-06-16

    ,” Design and Diagnostics of Electronic Circuits & Systems (DDECS), 2012 IEEE 15th International Symposium on , pp.74,78, 18-20 April 2012 [3] A.M.J. Koonen, H.P.A. van den Boom, E.O. Martinez, P. Guignard, E. Tangdiongga, “Cost optimization of optical... on the datasheet of the APD employed in the experiments (First Sensor AD800-11). The value used is 0.275 A/W for M=1. The receiver noise performance and APD avalanche gain (M) used in the simulation model are based on experimentally- determined values. The beam...

  6. The Case For Prediction-based Best-effort Real-time Systems

    E-Print Network [OSTI]

    Shewchuk, Jonathan

    be adjusted based on user-perceived quality. After defining this class of applications, we de- scribe by the Advanced Research Projects Agency and Rome Laboratory, Air Force Materiel Command, USAF, under agreement

  7. Robust GPS-Based Timing for Phasor Measurement Units: A Position-Information-

    E-Print Network [OSTI]

    Gao, Grace Xingxin

    . INTRODUCTION Invented in the 1980s, Phasor Measurement Units (PMU), also known as synchrophasors, are GPS based between measurements collected by SCADA and a PMU during disturbance in a power grid in Oklahoma [1]. GPS

  8. Transit Timing Observations from Kepler: VII. Potentially interesting candidate systems from Fourier-based statistical tests

    SciTech Connect (OSTI)

    Steffen, Jason H.; Ford, Eric B.; Rowe, Jason F.; Fabrycky, Daniel C.; Holman, Matthew J.; Welsh, William F.; Borucki, William J.; Batalha, Natalie M.; Bryson, Steve; Caldwell, Douglas A.; Ciardi, David R.; /Caltech /NASA, Ames /SETI Inst., Mtn. View

    2012-01-01

    We analyze the deviations of transit times from a linear ephemeris for the Kepler Objects of Interest (KOI) through Quarter six (Q6) of science data. We conduct two statistical tests for all KOIs and a related statistical test for all pairs of KOIs in multi-transiting systems. These tests identify several systems which show potentially interesting transit timing variations (TTVs). Strong TTV systems have been valuable for the confirmation of planets and their mass measurements. Many of the systems identified in this study should prove fruitful for detailed TTV studies.

  9. CLIPPER: Counter-based Low Impact Processor Power Estimation at Run-time

    E-Print Network [OSTI]

    New South Wales, University of

    is dif- ficult as measurement systems for power and energy usage draw too much power themselves, making Parameswaran School of Computer Science and Engineering, National ICT Australia The University of New South the knowledge of processor power/energy consumption at run- time. So far, no efficient method to provide run

  10. Frequency domain and time domain analysis of thermoacoustic oscillations with wave-based acoustics

    E-Print Network [OSTI]

    Orchini, A.; Illingworth, S. J.; Juniper, M. P.

    2015-05-14

    Many thermoacoustic systems exhibit rich nonlinear behaviour. Recent studies show that this nonlinear dynamics can be well captured by low-order time domain models that couple a level set kinematic model for a laminar flame, the G-equation, with a...

  11. Semi-Automatic Region-Based Memory Management for Real-Time Java Embedded Systems

    E-Print Network [OSTI]

    Salagnac, Guillaume

    , our system behaves as efficiently as a garbage collector in terms of memory consumption. Our analysis garbage collectors (GC) is further- more hindered by hardware limitations, and embedded sys- tems analysis tool, we provide an environ- ment where all memory operations run in predictable time, 1http://java.sun

  12. A Supply Chain Network Game Theoretic Framework for Time-Based Competition with

    E-Print Network [OSTI]

    Nagurney, Anna

    and on the demand side; Consumers at the demand markets for the substitutable, but differentiated, products respond Management Isenberg School of Management University of Massachusetts Amherst, Massachusetts 01003 2Pamplin Conference on Computational Management Science May 1-3, 2013, HEC Montr´eal, Quebec, Canada Nagurney, Yu Time

  13. Compact real-time 2-D gradient-based analog VLSI motion sensor

    E-Print Network [OSTI]

    Deutschmann, Rainer

    and projection of its trajectory, obstacle avoidance, ego-motion estimation, recovering the 3-D velocity and 3-D-parallel architecture of the sensor can favourably be used for real-time computation of the focus of expansion step to solving these tasks is often to compute the so called optical ow eld, which is an estimate

  14. Complex absorbing potential based Lorentzian fitting scheme and time dependent quantum transport

    SciTech Connect (OSTI)

    Xie, Hang Kwok, Yanho; Chen, GuanHua; Jiang, Feng; Zheng, Xiao

    2014-10-28

    Based on the complex absorbing potential (CAP) method, a Lorentzian expansion scheme is developed to express the self-energy. The CAP-based Lorentzian expansion of self-energy is employed to solve efficiently the Liouville-von Neumann equation of one-electron density matrix. The resulting method is applicable for both tight-binding and first-principles models and is used to simulate the transient currents through graphene nanoribbons and a benzene molecule sandwiched between two carbon-atom chains.

  15. Timing Aware Partitioning for Multi-FPGA based Logic Simulation using Top-down Selective Flattening 

    E-Print Network [OSTI]

    Poothamkurissi Swaminathan, Subramanian

    2012-10-19

    to partition the design and simulate it on a multi-FPGA platform. In contrast to existing FPGA-based post-synthesis partitioning approaches which first completely flatten the circuit and then possibly perform bottom-up clustering, we perform a selective top...

  16. Discrete-Time Model of an IPMSM Based on Variational Integrators

    E-Print Network [OSTI]

    Noé, Reinhold

    as automobile traction drives for electric and hybrid electric vehicles. Since motor control is commonly. INTRODUCTION Interior permanent magnet synchronous motors (IPMSM) provide a high efficiency besides very high motor models are needed to design appropriate control algorithms based on a deep insight into the motor

  17. Supervised Learning Based Model for Predicting Variability-Induced Timing Errors

    E-Print Network [OSTI]

    Gupta, Rajesh

    combat variations in hardware and workload by increasing conservative guardbanding that leads, for a given amount of guardband reduction. The proposed methodology enables a model-based rule method the robustness of our modeling methodology by considering various operating voltage and temperature corners. Our

  18. SYMBOLS FOR TIME = time variable

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    =forever) Cost spent to build variation point i at time i = index over variation points #12;SYMBOLS FOR TIME to account for net present value of money r = assumed interest rate i = index over variation points Cost Expected cost summed over all relevant time intervals Cost spent to build variation point i at time r

  19. Fluorescence Rise Time Measurements for High Temperature Fluorescence-Based Thermometry

    SciTech Connect (OSTI)

    Allison, S.W.

    2005-03-24

    Certain ceramic-like phosphor materials exhibit bright fluorescence with a pronounced temperature dependence over a range which spans the cryogenic to 1700 C, depending on the specific phosphor. To measure temperature, a surface, for instance a turbine blade, is coated with the material. An optical system, sometimes including optical fibers, conveys stimulating light and collects the emission for analysis. Either emission intensity or decay time may indicate temperature. Previously fielded tests have involved surfaces such as blades, vanes, pistons, in-take valves, sheets of galvanneal steel, etc. The fluorescent coatings may be applied to small parts via sputtering methods or to large areas by mixture with inorganic binders. Presented here are results characterizing fluorescence rise times as a means of determining temperature from ambient to 700 C for Y{sub 2}O{sub 3}:Eu.

  20. Invited Article: Characterization of background sources in space-based time-of-flight mass spectrometers

    SciTech Connect (OSTI)

    Gilbert, J. A.; Gershman, D. J.; Gloeckler, G.; Lundgren, R. A.; Zurbuchen, T. H.; Orlando, T. M.; McLain, J.; Steiger, R. von

    2014-09-15

    For instruments that use time-of-flight techniques to measure space plasma, there are common sources of background signals that evidence themselves in the data. The background from these sources may increase the complexity of data analysis and reduce the signal-to-noise response of the instrument, thereby diminishing the science value or usefulness of the data. This paper reviews several sources of background commonly found in time-of-flight mass spectrometers and illustrates their effect in actual data using examples from ACE-SWICS and MESSENGER-FIPS. Sources include penetrating particles and radiation, UV photons, energy straggling and angular scattering, electron stimulated desorption of ions, ion-induced electron emission, accidental coincidence events, and noise signatures from instrument electronics. Data signatures of these sources are shown, as well as mitigation strategies and design considerations for future instruments.

  1. Exploiting Real-Time FPGA Based Adaptive Systems Technology for Real-Time Sensor Fusion in Next Generation Automotive Safety Systems

    E-Print Network [OSTI]

    Chappell, Steve; Preston, Dan; Olmstead, Dave; Flint, Bob; Sullivan, Chris

    2011-01-01

    We present a system for the boresighting of sensors using inertial measurement devices as the basis for developing a range of dynamic real-time sensor fusion applications. The proof of concept utilizes a COTS FPGA platform for sensor fusion and real-time correction of a misaligned video sensor. We exploit a custom-designed 32-bit soft processor core and C-based design & synthesis for rapid, platform-neutral development. Kalman filter and sensor fusion techniques established in advanced aviation systems are applied to automotive vehicles with results exceeding typical industry requirements for sensor alignment. Results of the static and the dynamic tests demonstrate that using inexpensive accelerometers mounted on (or during assembly of) a sensor and an Inertial Measurement Unit (IMU) fixed to a vehicle can be used to compute the misalignment of the sensor to the IMU and thus vehicle. In some cases the model predications and test results exceeded the requirements by an order of magnitude with a 3-sigma or ...

  2. Next-Generation Liquid-Scintillator-Based Detectors: Quantums Dots and Picosecond Timing

    E-Print Network [OSTI]

    Lindley Winslow

    2013-07-10

    Liquid-scintillator-based detectors are a robust technology that scales well to large volumes. For this reason, they are attractive for experiments searching for neutrinoless double-beta decay. A combination of improved photo-detection technology and novel liquid scintillators may allow for the extraction of particle direction in addition to the total energy of the particle. Such an advance would find applications beyond searches for neutrinoless double-beta decay.

  3. Thermal bistability-based method for real-time optimization of ultralow-threshold whispering gallery mode microlasers

    E-Print Network [OSTI]

    Lin, Guoping; Tillement, O; Cai, Zhiping; Lefèvre-Seguin, V; Hare, J

    2015-01-01

    A method based on thermal bistability for ultralow-threshold microlaser optimization is demonstrated. When sweeping the pump laser frequency across a pump resonance, the dynamic thermal bistability slows down the power variation. The resulting line shape modification enables a real-time monitoring of the laser characteristic. We demonstrate this method for a functionalized microsphere exhibiting a submicrowatt laser threshold. This approach is confirmed by comparing the results with a step-by-step recording in quasi-static thermal conditions.

  4. GPU-based quasi-real-time Track Recognition in Imaging Devices: from raw Data to Particle Tracks

    E-Print Network [OSTI]

    Bozza, Cristiano; De Sio, Chiara; Stellacci, Simona Maria

    2015-01-01

    Nuclear emulsions as tracking devices have been used by recent experiments thanks to fast automatic microscopes for emulsion readout. Automatic systems are evolving towards GPU-based solutions. Real-time imaging is needed to drive the motion of the microscope axes and 3D track recognition occurs quasi-online in local GPU clusters. The algorithms implemented in the Quick Scanning System are sketched. Most of them are very general and might turn out useful for other detector

  5. Rate Analysis of Two Photovoltaic Systems in San Diego

    SciTech Connect (OSTI)

    Doris, E.; Ong, S.; Van Geet, O.

    2009-07-01

    Analysts have found increasing evidence that rate structure has impacts on the economics of solar systems. This paper uses 2007 15-minute interval photovoltaic (PV) system and load data from two San Diego City water treatment facilities to illustrate impacts of different rate designs. The comparison is based on rates available in San Diego at the time of data collection and include proportionately small to large demand charges (relative to volumetric consumption), and varying on- and off- peak times. Findings are twofold for these large commercial systems: 1) transferring costs into demand charges does not result in savings and 2) changes in peak times do not result in a major cost difference during the course of a year. While lessons learned and discussion on rate components are based on the findings, the applicability is limited to buildings with similar systems, environments, rate options, and loads.

  6. Transmission line relay mis-operation detection based on time-synchronized field data

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

    Esmaeilian, Ahad; Popovic, Tomo; Kezunovic, Mladen

    2015-05-04

    In this paper, a real-time tool to detect transmission line relay mis-operation is implemented. The tool uses time-synchronized measurements obtained from both ends of the line during disturbances. The proposed fault analysis tool comes into the picture only after the protective device has operated and tripped the line. The proposed methodology is able not only to detect, classify, and locate transmission line faults, but also to accurately confirm whether the line was tripped due to a mis-operation of protective relays. The analysis report includes either detailed description of the fault type and location or detection of relay mis-operation. As such,more »it can be a source of very useful information to support the system restoration. The focus of the paper is on the implementation requirements that allow practical application of the methodology, which is illustrated using the field data obtained the real power system. Testing and validation is done using the field data recorded by digital fault recorders and protective relays. The test data included several hundreds of event records corresponding to both relay mis-operations and actual faults. The discussion of results addresses various challenges encountered during the implementation and validation of the presented methodology.« less

  7. FPGA Based Real-time Network Traffic Analysis using Traffic Dispersion Patterns

    SciTech Connect (OSTI)

    Khan, F; Gokhale, M; Chuah, C N

    2010-03-26

    The problem of Network Traffic Classification (NTC) has attracted significant amount of interest in the research community, offering a wide range of solutions at various levels. The core challenge is in addressing high amounts of traffic diversity found in today's networks. The problem becomes more challenging if a quick detection is required as in the case of identifying malicious network behavior or new applications like peer-to-peer traffic that have potential to quickly throttle the network bandwidth or cause significant damage. Recently, Traffic Dispersion Graphs (TDGs) have been introduced as a viable candidate for NTC. The TDGs work by forming a network wide communication graphs that embed characteristic patterns of underlying network applications. However, these patterns need to be quickly evaluated for mounting real-time response against them. This paper addresses these concerns and presents a novel solution for real-time analysis of Traffic Dispersion Metrics (TDMs) in the TDGs. We evaluate the dispersion metrics of interest and present a dedicated solution on an FPGA for their analysis. We also present analytical measures and empirically evaluate operating effectiveness of our design. The mapped design on Virtex-5 device can process 7.4 million packets/second for a TDG comprising of 10k flows at very high accuracies of over 96%.

  8. 2012 Transmission Rate Schedules

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

    for HLH and LLH. 2. OTHER RATE PROVISIONS a. BPA Incremental Cost BPA's incremental cost will be based on an hourly energy index in the Pacific Northwest. If no adequate...

  9. A Comprehensive Statistically-Based Method to Interpret Real-Time Flowing Measurements

    SciTech Connect (OSTI)

    Keita Yoshioka; Pinan Dawkrajai; Analis A. Romero; Ding Zhu; A. D. Hill; Larry W. Lake

    2007-01-15

    With the recent development of temperature measurement systems, continuous temperature profiles can be obtained with high precision. Small temperature changes can be detected by modern temperature measuring instruments such as fiber optic distributed temperature sensor (DTS) in intelligent completions and will potentially aid the diagnosis of downhole flow conditions. In vertical wells, since elevational geothermal changes make the wellbore temperature sensitive to the amount and the type of fluids produced, temperature logs can be used successfully to diagnose the downhole flow conditions. However, geothermal temperature changes along the wellbore being small for horizontal wells, interpretations of a temperature log become difficult. The primary temperature differences for each phase (oil, water, and gas) are caused by frictional effects. Therefore, in developing a thermal model for horizontal wellbore, subtle temperature changes must be accounted for. In this project, we have rigorously derived governing equations for a producing horizontal wellbore and developed a prediction model of the temperature and pressure by coupling the wellbore and reservoir equations. Also, we applied Ramey's model (1962) to the build section and used an energy balance to infer the temperature profile at the junction. The multilateral wellbore temperature model was applied to a wide range of cases at varying fluid thermal properties, absolute values of temperature and pressure, geothermal gradients, flow rates from each lateral, and the trajectories of each build section. With the prediction models developed, we present inversion studies of synthetic and field examples. These results are essential to identify water or gas entry, to guide flow control devices in intelligent completions, and to decide if reservoir stimulation is needed in particular horizontal sections. This study will complete and validate these inversion studies.

  10. A Real-Time Beam Monitor for Hadrontherapy Applications Based on Thin Foil Secondary Electron Emission and a Back-Thinned Monolithic Pixel Sensor

    E-Print Network [OSTI]

    Badano, L; Caccia, M; Cappellini, C; Chmill, V; Jastrzab, M; Abbas, K; Holzwarth, U; Gibson, P N; Molinari, G

    2008-01-01

    A Real-Time Beam Monitor for Hadrontherapy Applications Based on Thin Foil Secondary Electron Emission and a Back-Thinned Monolithic Pixel Sensor

  11. Real-time Global Flood Estimation using Satellite-based Precipitation and a Coupled Land Surface and Routing Model

    SciTech Connect (OSTI)

    Wu, Huan; Adler, Robert F.; Tian, Yudong; Huffman, George; Li, Hongyi; Wang, Jianjian

    2014-04-09

    A community land surface model, the Variable Infiltration Capacity (VIC) model, is coupled with a newly developed hierarchical dominant river tracing-based runoff-routing model to form the Dominant river tracing-Routing Integrated with VIC Environment (DRIVE) model system, which serves as the new core of the real-time Global Flood Monitoring System (GFMS). The GFMS uses real-time satellite-based precipitation to derive flood-monitoring parameters for the latitude-band 50{degree sign}N-50{degree sign}S at relatively high spatial (~12km) and temporal (3-hourly) resolution. Examples of model results for recent flood events are computed using the real-time GFMS (http://flood.umd.edu). To evaluate the accuracy of the new GFMS, the DRIVE model is run retrospectively for 15 years using both research-quality and real-time satellite precipitation products. Statistical results are slightly better for the research-quality input and significantly better for longer duration events (three-day events vs. one-day events). Basins with fewer dams tend to provide lower false alarm ratios. For events longer than three days in areas with few dams, the probability of detection is ~0.9 and the false alarm ratio is ~0.6. In general, these statistical results are better than those of the previous system. Streamflow was evaluated at 1,121 river gauges across the quasi-global domain. Validation using real-time precipitation across the tropics (30ºS-30ºN) gives positive daily Nash-Sutcliffe Coef?cients for 107 out of 375 (28%) stations with a mean of 0.19 and 51% of the same gauges at monthly scale with a mean of 0.33. There were poorer results in higher latitudes, probably due to larger errors in the satellite precipitation input.

  12. Characterization of a detector chain using a FPGA-based Time-to-Digital Converter to reconstruct the three-dimensional coordinates of single particles at high flux

    E-Print Network [OSTI]

    Nogrette, F; Chang, R; Bouton, Q; Westbrook, C I; Sellem, R; Clément, D

    2015-01-01

    We report on the development of a novel FPGA-based Time-to-Digital Converter and its implementation in a detection chain that records the coordinates of single particles along three dimensions. The detector is composed of Micro-Channel Plates mounted on top of a cross delay line and connected to fast electronics. We demonstrate continuous recording of the timing signals from the cross delay line at rates up to 4.1x10^6 per second and three-dimensional reconstruction of the coordinates up to 2.5x10^6 particles per second. From the imaging of a calibrated structure we measure the in-plane resolution of the detector to be 140(20) um. In addition we analyze a method to measure the resolution without placing any structure under vacuum, a significant practical improvement. While we use UV photons here, the results of this work directly apply to the detection of other kinds of particles.

  13. A new interpretation of deformation rates in the Snake River Plain and adjacent basin and range regions based on GPS measurements

    SciTech Connect (OSTI)

    S.J. Payne; R. McCaffrey; R.W. King; S.A. Kattenhorn

    2012-04-01

    We evaluate horizontal Global Positioning System (GPS) velocities together with geologic, volcanic, and seismic data to interpret extension, shear, and contraction within the Snake River Plain and the Northern Basin and Range Province, U.S.A. We estimate horizontal surface velocities using GPS data collected at 385 sites from 1994 to 2009 and present an updated velocity field within the Stable North American Reference Frame (SNARF). Our results show an ENE-oriented extensional strain rate of 5.9 {+-} 0.7 x 10{sup -9} yr{sup -1} in the Centennial Tectonic belt and an E-oriented extensional strain rate of 6.2 {+-} 0.3 x 10{sup -9} yr{sup -1} in the Intermountain Seismic belt combined with the northern Great Basin. These extensional strain rates contrast with the regional north-south contraction of -2.6 {+-} 1.1 x 10{sup -9} yr{sup -1} calculated in the Snake River Plain and Owyhee-Oregon Plateau over a 125 x 650 km region. Tests that include dike-opening reveal that rapid extension by dike intrusion in volcanic rift zones does not occur in the Snake River Plain at present. This slow internal deformation in the Snake River Plain is in contrast to the rapidly-extending adjacent Basin and Range provinces and implies shear along boundaries of the Snake River Plain. We estimate right-lateral shear with slip rates of 0.5-1.5 mm/yr along the northwestern boundary adjacent to the Centennial Tectonic belt and left-lateral oblique extension with slip rates of <0.5 to 1.7 mm/yr along the southeastern boundary adjacent to the Intermountain Seismic belt. The fastest lateral shearing occurs near the Yellowstone Plateau where strike-slip focal mechanisms and faults with observed strike-slip components of motion are documented. The regional GPS velocity gradients are best fit by nearby poles of rotation for the Centennial Tectonic belt, Idaho batholith, Snake River Plain, Owyhee-Oregon Plateau, and central Oregon, indicating that clockwise rotation is driven by extension to the south in the Great Basin and not localized extension in the Basin and Range or Yellowstone hotspot volcanism. We propose that the GPS velocity field reflects the regional deformation pattern since at least 15-12 Ma, with clockwise rotation over the Northern Basin and Range Province consistent with Basin and Range extension initiating 16 Ma. The region modified by hotspot volcanism has a low-strain rate. If we assume the low rate of deformation is reflected in the length of time between eruptions on the order of 10{sup 4} to >10{sup 6} yrs, the low-strain field in the Snake River Plain and Owyhee-Oregon Plateau would extend through the Quaternary.

  14. High-Rate Fabrication of a-Si-Based Thin-Film Solar Cells Using Large-Area VHF PECVD Processes

    SciTech Connect (OSTI)

    Deng, Xunming; Fan, Qi Hua

    2011-12-31

    The University of Toledo (UT), working in concert with it’s a-Si-based PV industry partner Xunlight Corporation (Xunlight), has conducted a comprehensive study to develop a large-area (3ft x 3ft) VHF PECVD system for high rate uniform fabrication of silicon absorber layers, and the large-area VHF PECVD processes to achieve high performance a-Si/a-SiGe or a-Si/nc-Si tandem junction solar cells during the period of July 1, 2008 to Dec. 31, 2011, under DOE Award No. DE-FG36-08GO18073. The project had two primary goals: (i) to develop and improve a large area (3 ft × 3 ft) VHF PECVD system for high rate fabrication of > = 8 Å/s a-Si and >= 20 Å/s nc-Si or 4 Å/s a-SiGe absorber layers with high uniformity in film thicknesses and in material structures. (ii) to develop and optimize the large-area VHF PECVD processes to achieve high-performance a-Si/nc-Si or a-Si/a-SiGe tandem-junction solar cells with >= 10% stable efficiency. Our work has met the goals and is summarized in “Accomplishments versus goals and objectives”.

  15. Design and Implementation of Real-Time Off-Grid Detection Tool Based on FNET/GridEye

    SciTech Connect (OSTI)

    Guo, Jiahui; Zhang, Ye; Liu, Yilu; Young II, Marcus Aaron; Irminger, Philip; Dimitrovski, Aleksandar D; Willging, Patrick

    2014-01-01

    Real-time situational awareness tools are of critical importance to power system operators, especially during emergencies. The availability of electric power has become a linchpin of most post disaster response efforts as it is the primary dependency for public and private sector services, as well as individuals. Knowledge of the scope and extent of facilities impacted, as well as the duration of their dependence on backup power, enables emergency response officials to plan for contingencies and provide better overall response. Based on real-time data acquired by Frequency Disturbance Recorders (FDRs) deployed in the North American power grid, a real-time detection method is proposed. This method monitors critical electrical loads and detects the transition of these loads from an on-grid state, where the loads are fed by the power grid to an off-grid state, where the loads are fed by an Uninterrupted Power Supply (UPS) or a backup generation system. The details of the proposed detection algorithm are presented, and some case studies and off-grid detection scenarios are also provided to verify the effectiveness and robustness. Meanwhile, the algorithm has already been implemented based on the Grid Solutions Framework (GSF) and has effectively detected several off-grid situations.

  16. Time-dependent Multi-group Multidimensional Relativistic Radiative Transfer Code Based On Spherical Harmonic Discrete Ordinate Method

    E-Print Network [OSTI]

    Tominaga, Nozomu; Blinnikov, Sergei I

    2015-01-01

    We develop a time-dependent multi-group multidimensional relativistic radiative transfer code, which is required to numerically investigate radiation from relativistic fluids involved in, e.g., gamma-ray bursts and active galactic nuclei. The code is based on the spherical harmonic discrete ordinate method (SHDOM) that evaluates a source function including anisotropic scattering in spherical harmonics and implicitly solves the static radiative transfer equation with a ray tracing in discrete ordinates. We implement treatments of time dependence, multi-frequency bins, Lorentz transformation, and elastic Thomson and inelastic Compton scattering to the publicly available SHDOM code. Our code adopts a mixed frame approach; the source function is evaluated in the comoving frame whereas the radiative transfer equation is solved in the laboratory frame. This implementation is validated with various test problems and comparisons with results of a relativistic Monte Carlo code. These validations confirm that the code ...

  17. Hit time and hit position reconstruction in the J-PET detector based on a library of averaged model signals

    E-Print Network [OSTI]

    P. Moskal; N. G. Sharma; M. Silarski; T. Bednarski; P. Bia?as; J. Bu?ka; E. Czerwi?ski; A. Gajos; D. Kami?ska; L. Kap?on; A. Kochanowski; G. Korcyl; J. Kowal; P. Kowalski; T. Kozik; W. Krzemie?; E. Kubicz; Sz. Nied?wiecki; M. Pa?ka; L. Raczy?ski; Z. Rudy; O. Rundel; P. Salabura; A. S?omski; J. Smyrski; A. Strzelecki; A. Wieczorek; W. Wi?licki; I. Wochlik; M. Zieli?ski; N. Zo?

    2015-02-27

    In this article we present a novel method of hit time and hit position reconstruction in long scintillator detectors. We take advantage of the fact that for this kind of detectors amplitude and shape of registered signals depends strongly on the position where particle hit the detector. The reconstruction is based on determination of the degree of similarity between measured and averaged signals stored in a library for a set of well-defined positions along the scintillator. Preliminary results of validation of the introduced method with experimental data obtained by means of the double strip prototype of the J-PET detector are presented.

  18. Prediction of global solar irradiance based on time series analysis: Application to solar thermal power plants energy production planning

    SciTech Connect (OSTI)

    Martin, Luis; Marchante, Ruth; Cony, Marco; Zarzalejo, Luis F.; Polo, Jesus; Navarro, Ana

    2010-10-15

    Due to strong increase of solar power generation, the predictions of incoming solar energy are acquiring more importance. Photovoltaic and solar thermal are the main sources of electricity generation from solar energy. In the case of solar thermal energy plants with storage energy system, its management and operation need reliable predictions of solar irradiance with the same temporal resolution as the temporal capacity of the back-up system. These plants can work like a conventional power plant and compete in the energy stock market avoiding intermittence in electricity production. This work presents a comparisons of statistical models based on time series applied to predict half daily values of global solar irradiance with a temporal horizon of 3 days. Half daily values consist of accumulated hourly global solar irradiance from solar raise to solar noon and from noon until dawn for each day. The dataset of ground solar radiation used belongs to stations of Spanish National Weather Service (AEMet). The models tested are autoregressive, neural networks and fuzzy logic models. Due to the fact that half daily solar irradiance time series is non-stationary, it has been necessary to transform it to two new stationary variables (clearness index and lost component) which are used as input of the predictive models. Improvement in terms of RMSD of the models essayed is compared against the model based on persistence. The validation process shows that all models essayed improve persistence. The best approach to forecast half daily values of solar irradiance is neural network models with lost component as input, except Lerida station where models based on clearness index have less uncertainty because this magnitude has a linear behaviour and it is easier to simulate by models. (author)

  19. Growth Kinetics of Lipid-Based Nanodiscs to Unilamellar Vesicles: A Time-Resolved Small Angle Neutron Scattering (SANS) Study

    SciTech Connect (OSTI)

    Mahabir, Suanne [University of Western Ontario, The; Small, Darcy [University of Western Ontario, The; Li, Ming [University of Connecticut, Storrs; Wan, Wankei [University of Western Ontario, The; Kucerka, Norbert [Canadian Neutron Beam Centre and Comelius University (Slovakia); Littrell, Ken [ORNL; Katsaras, John [ORNL; Nieh, Mu-Ping [University of Connecticut, Storrs

    2013-01-01

    Mixtures of dimyristoyl-phosphatidylcholine (DMPC), dimyristoyl-phosphatidylglycerol (DMPG) and dihexanoylphosphatidylcholine (DHPC) in aqueous solutions spontaneously form monodisperse, bilayered nanodiscs (also known as bicelles ) at or below the melting transition temperature of DMPC (TM ~23 C). In dilute systems above the main transition temperature TM of DMPC, bicelles coalesce (increasing their diameter) and eventually self-fold into unilamellar vesicles (ULVs). Time resolved small angle neutron scattering was used to study the growth kinetics of nanodiscs below and equal to TM over a period of hours as a function of temperature at two lipid concentrations in presence or absence of NaCl salt. Bicelles seem to undergo a sudden initial growth phase with increased temperature, which is then followed by a slower reaction-limited growth phase that depends on ionic strength, lipid concentration and temperature. The bicelle interaction energy was derived from the colloidal theory of Derjaguin and Landau, and Verwey and Overbeek (DLVO). While the calculated total energy between discs is attractive and proportional to their growth rate, a more detailed mechanism is proposed to describe the mechanism of disc coalescence. After annealing at low temperature (low-T), samples were heated to 50 C in order to promote the formation of ULVs. Although the low-T annealing of samples has only a marginal effect on the mean size of end-state ULVs, it does affect their polydispersity, which increases with increased T, presumably driven by the entropy of the system.

  20. A Web-Based Common Framework to Support the Test and Evaluation Process Any Time, Anywhere, and Anyhow

    SciTech Connect (OSTI)

    Schur, Anne ); Brown, James C. ); Eaton, Sharon L. ); Gibson, Alex G. ); Scott, Ryan T. ); Tanasse, Ted E. )

    2001-01-01

    Test and evaluation (T and E) is an enterprise. For any product, large or small, performance data is desired on many aspects to evaluate the product?s effectiveness for the intended users. Representing the many T and E facets without bewildering the user is challenging when there is a range of people, from the system developers to the manager of the organization, that want specific feedback. A web-based One-Stop Evaluation Center was created to meet these needs for a particular project. The evaluation center is usable at any time in the systems development lifecycle and streamlines the T and E enterprise. This paper discusses a common framework that unifies the T and E process with many stakeholders involved and is flexible to accommodate each stakeholders?specific evaluative processes and content. Our success has translated to many cost savings by enabling quick responses to change and a better line of communication between the users, developers, and managers.

  1. Model-Based Clustering of Regression Time Series Data via APECM -- An AECM Algorithm Sung to an Even Faster Beat

    SciTech Connect (OSTI)

    Chen, Wei-Chen [ORNL; Maitra, Ranjan [Iowa State University

    2011-01-01

    We propose a model-based approach for clustering time series regression data in an unsupervised machine learning framework to identify groups under the assumption that each mixture component follows a Gaussian autoregressive regression model of order p. Given the number of groups, the traditional maximum likelihood approach of estimating the parameters using the expectation-maximization (EM) algorithm can be employed, although it is computationally demanding. The somewhat fast tune to the EM folk song provided by the Alternating Expectation Conditional Maximization (AECM) algorithm can alleviate the problem to some extent. In this article, we develop an alternative partial expectation conditional maximization algorithm (APECM) that uses an additional data augmentation storage step to efficiently implement AECM for finite mixture models. Results on our simulation experiments show improved performance in both fewer numbers of iterations and computation time. The methodology is applied to the problem of clustering mutual funds data on the basis of their average annual per cent returns and in the presence of economic indicators.

  2. The Rate-Controlled Constrained-Equilibrium Approach to Far-From-Local-Equilibrium Thermodynamics

    E-Print Network [OSTI]

    Beretta, Gian Paolo

    The Rate-Controlled Constrained-Equilibrium (RCCE) method for the description of the time-dependent behavior of dynamical systems in non-equilibrium states is a general, effective, physically based method for model order ...

  3. A HIGH REPETITION RATE VUV-SOFT X-RAY FEL CONCEPT

    E-Print Network [OSTI]

    2007-01-01

    performance, based on a number of FEL configurations, fed byREPETITION RATE VUV-SOFT X-RAY FEL CONCEPT* J. Corlett # ,will be switched into each FEL in the array, in a time-

  4. Understanding local and macroscopic electron mobilities in the fullerene network of conjugated polymer-based solar cells: Time-resolved microwave conductivity and theory

    E-Print Network [OSTI]

    2014-01-01

    of low mobility on organic solar cell perfor- mance" , 15thPCBM is nearly ideal for solar cells: the coupling betweenof Conjugated Polymer-based Solar Cells: Time-Resolved

  5. Analyzing traditional and web-based news organizations: a science and technology news comparison of the New York Times and MSNBC News 

    E-Print Network [OSTI]

    Zhang, Miao

    2002-01-01

    and frames of science and technology news by analyzing science and technology news from the New York Times, a representative of traditional news organizations, and MSNBC, a representative of Web-based news organizations, for the period of December 2001...

  6. A field comparison of Fresnel zone and ray-based GPR attenuation-difference tomography for time-lapse imaging of

    E-Print Network [OSTI]

    Barrash, Warren

    A field comparison of Fresnel zone and ray-based GPR attenuation-difference tomography for time the medium. These sensitivities occupy the first Fresnel zone, account for the finite frequency nature

  7. National Utility Rate Database: Preprint

    SciTech Connect (OSTI)

    Ong, S.; McKeel, R.

    2012-08-01

    When modeling solar energy technologies and other distributed energy systems, using high-quality expansive electricity rates is essential. The National Renewable Energy Laboratory (NREL) developed a utility rate platform for entering, storing, updating, and accessing a large collection of utility rates from around the United States. This utility rate platform lives on the Open Energy Information (OpenEI) website, OpenEI.org, allowing the data to be programmatically accessed from a web browser, using an application programming interface (API). The semantic-based utility rate platform currently has record of 1,885 utility rates and covers over 85% of the electricity consumption in the United States.

  8. Price-Maker Economic Bidding in Two-Settlement Pool-Based Markets: The Case of Time-Shiftable Loads

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    are found for the price and energy bids within a relatively short amount of computational time. A detailed bidding, price bids, energy bids, day-ahead market, real-time market, time-shiftable loads, demand to day-ahead market y Energy bid to real-time market p Price bid submitted to the day-ahead market

  9. Summary of Time Period-Based and Other Approximation Methods for Determining the Capacity Value of Wind and Solar in the United States: September 2010 - February 2012

    SciTech Connect (OSTI)

    Rogers, J.; Porter, K.

    2012-03-01

    This paper updates previous work that describes time period-based and other approximation methods for estimating the capacity value of wind power and extends it to include solar power. The paper summarizes various methods presented in utility integrated resource plans, regional transmission organization methodologies, regional stakeholder initiatives, regulatory proceedings, and academic and industry studies. Time period-based approximation methods typically measure the contribution of a wind or solar plant at the time of system peak - sometimes over a period of months or the average of multiple years.

  10. Robustness of Ethernet-Based Real-Time Networked Control System with Multi-Level Client/Server Architecture 

    E-Print Network [OSTI]

    Bibinagar, Naveen Kumar

    2010-10-12

    The importance of real-time communication at the device level in a factory automation setup is a widely researched area. This research is an effort to experimentally verify if Ethernet can be used as a real-time communication ...

  11. Prediction of interest rate using CKLS model with stochastic parameters

    SciTech Connect (OSTI)

    Ying, Khor Chia [Faculty of Computing and Informatics, Multimedia University, Jalan Multimedia, 63100 Cyberjaya, Selangor (Malaysia); Hin, Pooi Ah [Sunway University Business School, No. 5, Jalan Universiti, Bandar Sunway, 47500 Subang Jaya, Selangor (Malaysia)

    2014-06-19

    The Chan, Karolyi, Longstaff and Sanders (CKLS) model is a popular one-factor model for describing the spot interest rates. In this paper, the four parameters in the CKLS model are regarded as stochastic. The parameter vector ?{sup (j)} of four parameters at the (J+n)-th time point is estimated by the j-th window which is defined as the set consisting of the observed interest rates at the j?-th time point where j?j??j+n. To model the variation of ?{sup (j)}, we assume that ?{sup (j)} depends on ?{sup (j?m)}, ?{sup (j?m+1)},…, ?{sup (j?1)} and the interest rate r{sub j+n} at the (j+n)-th time point via a four-dimensional conditional distribution which is derived from a [4(m+1)+1]-dimensional power-normal distribution. Treating the (j+n)-th time point as the present time point, we find a prediction interval for the future value r{sub j+n+1} of the interest rate at the next time point when the value r{sub j+n} of the interest rate is given. From the above four-dimensional conditional distribution, we also find a prediction interval for the future interest rate r{sub j+n+d} at the next d-th (d?2) time point. The prediction intervals based on the CKLS model with stochastic parameters are found to have better ability of covering the observed future interest rates when compared with those based on the model with fixed parameters.

  12. Supervised learning of a regression model based on latent process. Application to the estimation of fuel cell life time

    E-Print Network [OSTI]

    Chamroukhi, Faicel

    of fuel cell life time Raïssa Onanena(1) , Faicel Chamroukhi(1) , Latifa Oukhellou(1)(2) , Denis Candusso to estimate fuel cell duration time from electrochemical impedance spectroscopy measurements. It consists for the estimation of fuel cell time duration. The performances of the proposed approach are evaluated

  13. Feed rate measuring method and system

    DOE Patents [OSTI]

    Novak, J.L.; Wiczer, J.J.

    1995-12-05

    A system and method are provided for establishing the feed rate of a workpiece along a feed path with respect to a machine device. First and second sensors each having first and second sensing electrodes which are electrically isolated from the workpiece are positioned above, and in proximity to the desired surfaces of the workpiece along a feed path. An electric field is developed between the first and second sensing electrodes of each sensor and capacitance signals are developed which are indicative of the contour of the workpiece. First and second image signals representative of the contour of the workpiece along the feed path are developed by an image processor. The time delay between corresponding portions of the first and second image signals are then used to determine the feed rate based upon the separation of the first and second sensors and the amount of time between corresponding portions of the first and second image signals. 18 figs.

  14. 2007 Wholesale Power Rate Schedules : 2007 General Rate Schedule Provisions.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    2006-11-01

    This schedule is available for the contract purchase of Firm Power to be used within the Pacific Northwest (PNW). Priority Firm (PF) Power may be purchased by public bodies, cooperatives, and Federal agencies for resale to ultimate consumers, for direct consumption, and for Construction, Test and Start-Up, and Station Service. Rates in this schedule are in effect beginning October 1, 2006, and apply to purchases under requirements Firm Power sales contracts for a three-year period. The Slice Product is only available for public bodies and cooperatives who have signed Slice contracts for the FY 2002-2011 period. Utilities participating in the Residential Exchange Program (REP) under Section 5(c) of the Northwest Power Act may purchase Priority Firm Power pursuant to the Residential Exchange Program. Rates under contracts that contain charges that escalate based on BPA's Priority Firm Power rates shall be based on the three-year rates listed in this rate schedule in addition to applicable transmission charges. This rate schedule supersedes the PF-02 rate schedule, which went into effect October 1, 2001. Sales under the PF-07 rate schedule are subject to BPA's 2007 General Rate Schedule Provisions (2007 GRSPs). Products available under this rate schedule are defined in the 2007 GRSPs. For sales under this rate schedule, bills shall be rendered and payments due pursuant to BPA's 2007 GRSPs and billing process.

  15. Quantum time

    E-Print Network [OSTI]

    Giovannetti, Vittorio

    We give a consistent quantum description of time, based on Page and Wootters’s conditional probabilities mechanism, which overcomes the criticisms that were raised against similar previous proposals. In particular we show ...

  16. Rate of Mixing Controls Rate and Outcome of Autocatalytic Processes: Theory and Microfluidic Experiments with Chemical Reactions and

    E-Print Network [OSTI]

    Ismagilov, Rustem F.

    Experiments with Chemical Reactions and Blood Coagulation Rebecca R. Pompano, Hung-Wing Li, and Rustem F of both biological and nonbiological autocatalytic reaction systems that display a threshold response to the concentration of an activator. Plug-based microfluidics was used to control the timing of reactions, the rate

  17. High repetition rate fiber lasers

    E-Print Network [OSTI]

    Chen, Jian, Ph. D. Massachusetts Institute of Technology

    2009-01-01

    This thesis reports work in high repetition rate femtosecond fiber lasers. Driven by the applications including optical arbitrary waveform generation, high speed optical sampling, frequency metrology, and timing and frequency ...

  18. Activity-based Travel Demand Model with Time-use and Microsimulation incorporating Intra-household Interactions

    E-Print Network [OSTI]

    Kim, Hee-Kyung

    2008-01-01

    production function, the optimal allocation of time tofunction, the structural model of household resource allocationfunction. Domestic production model The optimal allocation

  19. Optical models of the big bang and non-trivial space-time metrics based on metamaterials

    E-Print Network [OSTI]

    Igor I. Smolyaninov

    2009-08-17

    Optics of metamaterials is shown to provide interesting table top models of many non-trivial space-time metrics. The range of possibilities is broader than the one allowed in classical general relativity. For example, extraordinary waves in indefinite metamaterials experience an effective metric, which is formally equivalent to the "two times physics" model in 2+2 dimensions. An optical analogue of a "big bang" event is presented during which a (2+1) Minkowski space-time is created together with large number of particles populating this space-time. Such metamaterial models enable experimental exploration of the metric phase transitions to and from the Minkowski space-time as a function of temperature and/or light frequency.

  20. PowerChoice Residential Customer Response to TOU Rates

    E-Print Network [OSTI]

    Peters, Jane S.

    2010-01-01

    1983. Time-of-Day Electricity Rates for the United States.to Voluntary Time-of-Use Electricity Rates. ” Resource andCompared to your old electricity rate, would you say that

  1. A Numerical Method for Pricing Electricity Derivatives for Jump-Diffusion Processes Based on Continuous Time Lattices

    E-Print Network [OSTI]

    Albanese, Claudio

    A Numerical Method for Pricing Electricity Derivatives for Jump-Diffusion Processes Based.tompaidis@mccombs.utexas.edu Corresponding author. Tel. 512-4715252, Fax 512-4710587. #12;A Numerical Method for Pricing Electricity method for pricing derivatives on electricity prices. The method is based on approximating the generator

  2. A web-based approach to image-based lighting using high dynamic range images and QuickTime object virtual reality 

    E-Print Network [OSTI]

    Cuellar, Tamara Melissa

    2008-10-10

    This thesis presents a web-based approach to lighting three-dimensional geometry in a virtual scene. The use of High Dynamic Range (HDR) images for the lighting model makes it possible to convey a greater sense of ...

  3. CTu3I.7.pdf CLEO Technical Digest OSA 2012 Wavelength-Tunable on-Chip True Time Delay Lines Based

    E-Print Network [OSTI]

    Texas at Austin, University of

    CTu3I.7.pdf CLEO Technical Digest © OSA 2012 Wavelength-Tunable on-Chip True Time Delay Lines Based are described in [2]. #12;CTu3I.7.pdf CLEO Technical Digest © OSA 2012 3. Measurements The modulation phase

  4. Estimated costs for advertising in Saturdays Canberra Times Stand Alone prices are based on small ads (aprox 100 words) and large ads (200 words) colour only

    E-Print Network [OSTI]

    Estimated costs for advertising in Saturdays Canberra Times Stand Alone prices are based on small Appt. Saturday $1,801.62 $300.27 Press Advertising Currently we advertise mainly in Saturdays Canberra composite ads reducing costs significantly. All other advertisements would appear as standalones. All

  5. The system for observing fitness instruction time (SOFIT) as a measure of energy expenditure during classroom based physical activity

    E-Print Network [OSTI]

    Honas, Jeffery J.; Washburn, Richard A.; Smith, Bryan K.; Greene, Leon; Cook-Wiens, Galen; Donnelly, Joseph E.

    2008-01-01

    The aim of this investigation was to develop an equation to estimate physical activity energy expenditure (PAEE) during a 10-min physically active academic lesson using The System for Observing Fitness Instruction Time ...

  6. High-Bandwidth AFM-Based Rheology Reveals that Cartilage is Most Sensitive to High Loading Rates at Early Stages of Impairment

    E-Print Network [OSTI]

    Tavakoli Nia, Hadi

    Utilizing a newly developed atomic-force-microscopy-based wide-frequency rheology system, we measured the dynamic nanomechanical behavior of normal and glycosaminoglycan (GAG)-depleted cartilage, the latter representing ...

  7. FRN and Rate Schedules

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

    Doing Business Skip navigation links Financial Information Financial Public Processes Asset Management Cost Verification Process Rate Cases BP-16 Rate Case OS-14 Rate Case FRN...

  8. FRN & Rate Schedules

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

    Doing Business Skip navigation links Financial Information Financial Public Processes Asset Management Cost Verification Process Rate Cases BP-16 Rate Case OS-14 Rate Case FRN...

  9. A time-resolved spectroscopic diagnostic based on fast scintillator and optical fiber array for z-pinch plasmas

    SciTech Connect (OSTI)

    Ye Fan; Qin Yi; Jiang Shuqing; Xue Feibiao; Li Zhenghong; Yang Jianlun; Xu Rongkun; Anan'ev, S. S.; Dan'ko, S. A.; Kalinin, Yu. G.

    2009-10-15

    We report a specially designed type of temporal resolved x-ray spectroscopic diagnostic using a spherically bent quartz crystal for z-pinch plasmas. Registration of time-resolved spectra was accomplished by coupling fast plastic scintillator, an optical fiber array, an optical streak camera, and a charge coupled device as the recording medium of this diagnostic. The diagnostic has been tested in imploding wire array experiments on S-300 pulsed power facility. Time-resolved K-shell lines were successfully obtained for aluminum wire array implosion plasmas.

  10. Blazar Flaring Rates Measured with GLAST

    E-Print Network [OSTI]

    C. D. Dermer; B. L. Dingus

    2003-12-22

    We derive the minimum observing time scales to detect a blazar at a given flux level with the LAT on GLAST in the scanning and pointing modes. Based upon Phase 1 observations with EGRET, we predict the GLAST detection rate of blazar flares at different flux levels. With some uncertainty given the poor statistics of bright blazars, we predict that a blazar flare with integral flux >~ 200e-8 ph(> 100 MeV) cm^{-2} s^{-1}, which are the best candidates for Target of Opportunity pointings and extensive temporal and spectral studies, should occur every few days.

  11. Blazar Flaring Rates Measured with GLAST

    E-Print Network [OSTI]

    Dermer, C D

    2004-01-01

    We derive the minimum observing time scales to detect a blazar at a given flux level with the LAT on GLAST in the scanning and pointing modes. Based upon Phase 1 observations with EGRET, we predict the GLAST detection rate of blazar flares at different flux levels. With some uncertainty given the poor statistics of bright blazars, we predict that a blazar flare with integral flux >~ 200e-8 ph(> 100 MeV) cm^{-2} s^{-1}, which are the best candidates for Target of Opportunity pointings and extensive temporal and spectral studies, should occur every few days.

  12. A Novel Time-Domain Based Design of PWM Controllers for Switch-Mode Converters and its Implementation by

    E-Print Network [OSTI]

    to discrete domain transformation and discretization. Digital PID controllers for a Buck and Boost type, known control transfer functions are transformed from analog (linear) into a digital equivalent using A new time-domain design method for digital controller of PWM DC-DC converters that was developed

  13. Centralized route recovery based on multi-hop wakeup time estimation for wireless sensor networks with ultra low duty cycles

    E-Print Network [OSTI]

    Bahk, Saewoong

    with ultra low duty cycles Wooguil Pak, Saewoong Bahk Department of EECS & INMC, Seoul National University Keywords: Wireless sensor network Routing protocol Ultra low duty cycle Network lifetime Multi-hop wakeup time estimation to maximize the network lifetime of WSNs under ultra low duty cycles. It does not use

  14. 1664 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 64, NO. 5, MAY 2015 Real-Time Path Planning Based on

    E-Print Network [OSTI]

    Shen, Xuemin "Sherman"

    utilization and drivers' travel cost. Index Terms--Hybrid VANETs, path planning, spatial utiliza- tion, travel1664 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 64, NO. 5, MAY 2015 Real-Time Path Planning planning can efficiently relieve traffic congestion in urban scenarios. However, how to design an efficient

  15. Real-time implementation of a neural networks-based motor speed filter using a digital signal processor 

    E-Print Network [OSTI]

    Harihara, Parasuram Padmanabhan

    2002-01-01

    numerous speed estimation methods have been reported in the literature for the control of an induction motor drive, it is the accuracy of the speed estimate and the response time of the filter that are the important parameters describing the speed filter...

  16. Benefits of Considering Inventory in Service Parts Logistics Network Design Problems with Time-based Service Constraints

    E-Print Network [OSTI]

    Kutanoglu, Erhan

    Benefits of Considering Inventory in Service Parts Logistics Network Design Problems with Time, 2006 Abstract We study the integrated logistics network design and inventory stocking problem as char- acterized by the interdependency of the design and stocking decisions in service parts logistics. These two

  17. Benefits of Considering Inventory in Service Parts Logistics Network Design Problems with Time-based Service Constraints

    E-Print Network [OSTI]

    Kutanoglu, Erhan

    Benefits of Considering Inventory in Service Parts Logistics Network Design Problems with Time 18, 2005 Abstract We study the integrated logistics network design and inventory stocking problem as char- acterized by the interdependency of the design and stocking decisions in service parts logistics

  18. Chlorite Dissolution Rates

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Carroll, Susan

    2013-07-01

    Spreadsheets provides measured chlorite rate data from 100 to 300C at elevated CO2. Spreadsheet includes derived rate equation.

  19. Chlorite Dissolution Rates

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Carroll, Susan

    Spreadsheets provides measured chlorite rate data from 100 to 300C at elevated CO2. Spreadsheet includes derived rate equation.

  20. Tile-Based Fisher-Ratio Software for Improved Feature Selection Analysis of Comprehensive Two-Dimensional Gas Chromatography Time-of-Flight Mass Spectrometry Data

    SciTech Connect (OSTI)

    Marney, Luke C.; Siegler, William C.; Parsons, Brendon A.; Hoggard, Jamin C.; Wright, Bob W.; Synovec, Robert E.

    2013-10-15

    Two-dimensional (2D) gas chromatography coupled with time-of-flight mass spectrometry (GC × GC – TOFMS) is a highly capable instrumental platform that produces complex and information-rich multi-dimensional chemical data. The complex data can be overwhelming, especially when many samples (of various sample classes) are analyzed with multiple injections for each sample. Thus, the data must be analyzed in such a way to extract the most meaningful information. The pixel-based and peak table-based algorithmic use of Fisher ratios has been used successfully in the past to reduce the multi-dimensional data down to those chemical compounds that are changing between classes relative to those that are not (i.e., chemical feature selection). We report on the initial development of a computationally fast novel tile-based Fisher-ratio software that addresses challenges due to 2D retention time misalignment without explicitly aligning the data, which is a problem for both pixel-based and peak table- based methods. Concurrently, the tile-based Fisher-ratio software maximizes the sensitivity contrast of true positives against a background of potential false positives and noise. To study this software, eight compounds, plus one internal standard, were spiked into diesel at various concentrations. The tile-based F-ratio software was able to discover all spiked analytes, within the complex diesel sample matrix with thousands of potential false positives, in each possible concentration comparison, even at the lowest absolute spiked analyte concentration ratio of 1.06.

  1. Ballistic Imaging of High-Pressure Fuel Sprays using Incoherent, Ultra- short Pulsed Illumination with an Ultrafast OKE-based Time Gating

    E-Print Network [OSTI]

    Purwar, Harsh; Rozé, Claude; Blaisot, Jean-Bernard

    2015-01-01

    We present an optical Kerr effect based time-gate with the collinear incidence of the pump and probe beams at the Kerr medium, liquid carbon disulfide, for ballistic imaging of the high-pressure fuel sprays. The probe pulse used to illuminate the object under study is extracted from the supercontinuum generated by tightly focusing intense femtosecond laser pulses inside water, thereby destroying their coherence. The optical imaging spatial resolution and gate timings are investigated and compared with a similar setup without supercontinuum generation, where the probe is still coherent. And finally, a few ballistic images of the fuel sprays using coherent and incoherent illumination with the proposed time-gate are presented and compared qualitatively.

  2. Time-domain simulation of ultrasound propagation in a tissue-like medium based on the resolution of the nonlinear acoustic constitutive relations

    E-Print Network [OSTI]

    Jiménez, Noé; Redondo, Javier; Sánchez-Morcillo, Víctor; Hou, Yi; Konofagou, Elisa E

    2015-01-01

    A time-domain numerical code based on the constitutive relations of nonlinear acoustics for simulating ultrasound propagation is presented. To model frequency power law attenuation, such as observed in biological media, multiple relaxation processes are included and relaxation parameters are fitted to both exact frequency power law attenuation and empirically measured attenuation of a variety of tissues that does not fit an exact power law. A computational technique based on artificial relaxation is included to correct the non-negligible numerical dispersion of the numerical method and to improve stability when shock waves are present. This technique avoids the use of high order finite difference schemes, leading to fast calculations. The numerical code is especially suitable to study high intensity and focused axisymmetric acoustic beams in tissue-like medium, as it is based on the full constitutive relations that overcomes the limitations of the parabolic approximations, while some specific effects not cont...

  3. Micromagnetic analysis of dynamical bubble-like solitons based on the time domain evolution of the topological density

    SciTech Connect (OSTI)

    Puliafito, Vito Azzerboni, Bruno; Finocchio, Giovanni; Torres, Luis; Ozatay, Ozhan

    2014-05-07

    Dynamical bubble-like solitons have been recently investigated in nanocontact-based spin-torque oscillators with a perpendicular free layer. Those magnetic configurations can be excited also in different geometries as long as they consist of perpendicular materials. Thus, in this paper, a systematic study of the influence of both external field and high current on that kind of dynamics is performed for a spin-valve point-contact geometry where both free and fixed layers present strong perpendicular anisotropy. The usage of the topological density tool highlights the excitation of complex bubble/antibubble configurations. In particular, at high currents, a deformation of the soliton and its simultaneous shift from the contact area are observed and can be ascribable to the Oersted field. Results provide further detailed information on the excitation of solitons in perpendicular materials for application in spintronics, magnonics, and domain wall logic.

  4. Simplified motional heating rate measurements of trapped ions

    E-Print Network [OSTI]

    R. J. Epstein; S. Seidelin; D. Leibfried; J. H. Wesenberg; J. J. Bollinger; J. M. Amini; R. B. Blakestad; J. Britton; J. P. Home; W. M. Itano; J. D. Jost; E. Knill; C. Langer; R. Ozeri; N. Shiga; D. J. Wineland

    2007-07-10

    We have measured motional heating rates of trapped atomic ions, a factor that can influence multi-ion quantum logic gate fidelities. Two simplified techniques were developed for this purpose: one relies on Raman sideband detection implemented with a single laser source, while the second is even simpler and is based on time-resolved fluorescence detection during Doppler recooling. We applied these methods to determine heating rates in a microfrabricated surface-electrode trap made of gold on fused quartz, which traps ions 40 microns above its surface. Heating rates obtained from the two techniques were found to be in reasonable agreement. In addition, the trap gives rise to a heating rate of 300 plus or minus 30 per second for a motional frequency of 5.25 MHz, substantially below the trend observed in other traps.

  5. Simplified motional heating rate measurements of trapped ions

    E-Print Network [OSTI]

    Epstein, R J; Leibfried, D; Wesenberg, J H; Bollinger, J J; Amini, J M; Blakestad, R B; Britton, J; Home, J P; Itano, W M; Jost, J D; Knill, E; Langer, C; Ozeri, R; Shiga, N; Wineland, D J

    2007-01-01

    We have measured motional heating rates of trapped atomic ions, a factor that can influence multi-ion quantum logic gate fidelities. Two simplified techniques were developed for this purpose: one relies on Raman sideband detection implemented with a single laser source, while the second is even simpler and is based on time-resolved fluorescence detection during Doppler recooling. We applied these methods to determine heating rates in a microfrabricated surface-electrode trap made of gold on fused quartz, which traps ions 40 microns above its surface. Heating rates obtained from the two techniques were found to be in reasonable agreement. In addition, the trap gives rise to a heating rate of 300 plus or minus 30 per second for a motional frequency of 5.25 MHz, substantially below the trend observed in other traps.

  6. Inferring middle atmospheric ozone height profiles from ground-based measurements of molecular oxygen emission rates. 2. Comparison with O[sub 2]([sup 1][Delta][sub g])(0,1) band measurements at sunset

    SciTech Connect (OSTI)

    Sica, R.J.; Lowe, R.P. (Univ. of Western Ontario, London (Canada))

    1993-01-20

    The ability to routinely acquire measurements of the ozone density profile in the mesosphere and lower thermosphere is important for use in chemical-dynamical models of the middle atmosphere. Zenith measurements of the O[sub 2]([sup 1][Delta][sub g]) (0,1) band emission rate in the evening twilight were acquired near the spring equinox of 1982 with a Michelson interferometer from London, Ontario, Canada. Knowledge of the change of the O[sub 2]([sup 1][Delta][sub g])(0,1) band emission rate at twilight can be related directly to ozone density, since ozone destruction by sunlight is the primary source of O[sub 2]([sup 1][Delta][sub g]) in the atmosphere. Measurements and calculations have shown that a secondary peak in the ozone density often exists in the middle atmosphere. A model has been developed to infer the ozone profile in the middle atmosphere by simultaneously solving the time-dependent chemistry of the molecular oxygen atmospheric and atmospheric-IR bands and O(ID) during twilight. Calculations are presented which show the effect of a secondary peak in the ozone density at various heights on the O[sub 2]([sup 1][Delta][sub g]) (0,1) band emission rate during twilight. The model is used to demonstrate that the London measurements are consistent with an ozone profile with a secondary peak at 85-90 km. 17 refs., 7 figs.

  7. Unconditional Security of Time-Energy Entanglement Quantum Key Distribution Using Dual-Basis Interferometry

    E-Print Network [OSTI]

    Zhang, Zheshen

    High-dimensional quantum key distribution (HDQKD) offers the possibility of high secure-key rate with high photon-information efficiency. We consider HDQKD based on the time-energy entanglement produced by spontaneous ...

  8. STARLIB: A NEXT-GENERATION REACTION-RATE LIBRARY FOR NUCLEAR ASTROPHYSICS

    SciTech Connect (OSTI)

    Sallaska, A. L.; Iliadis, C.; Champange, A. E.; Goriely, S.; Starrfield, S.; Timmes, F. X.

    2013-07-15

    STARLIB is a next-generation, all-purpose nuclear reaction-rate library. For the first time, this library provides the rate probability density at all temperature grid points for convenient implementation in models of stellar phenomena. The recommended rate and its associated uncertainties are also included. Currently, uncertainties are absent from all other rate libraries, and, although estimates have been attempted in previous evaluations and compilations, these are generally not based on rigorous statistical definitions. A common standard for deriving uncertainties is clearly warranted. STARLIB represents a first step in addressing this deficiency by providing a tabular, up-to-date database that supplies not only the rate and its uncertainty but also its distribution. Because a majority of rates are lognormally distributed, this allows the construction of rate probability densities from the columns of STARLIB. This structure is based on a recently suggested Monte Carlo method to calculate reaction rates, where uncertainties are rigorously defined. In STARLIB, experimental rates are supplemented with: (1) theoretical TALYS rates for reactions for which no experimental input is available, and (2) laboratory and theoretical weak rates. STARLIB includes all types of reactions of astrophysical interest to Z = 83, such as (p, {gamma}), (p, {alpha}), ({alpha}, n), and corresponding reverse rates. Strong rates account for thermal target excitations. Here, we summarize our Monte Carlo formalism, introduce the library, compare methods of correcting rates for stellar environments, and discuss how to implement our library in Monte Carlo nucleosynthesis studies. We also present a method for accessing STARLIB on the Internet and outline updated Monte Carlo-based rates.

  9. High Pressure Burn Rate Measurements on an Ammonium Perchlorate Propellant

    SciTech Connect (OSTI)

    Glascoe, E A; Tan, N

    2010-04-21

    High pressure deflagration rate measurements of a unique ammonium perchlorate (AP) based propellant are required to design the base burn motor for a Raytheon weapon system. The results of these deflagration rate measurements will be key in assessing safety and performance of the system. In particular, the system may experience transient pressures on the order of 100's of MPa (10's kPSI). Previous studies on similar AP based materials demonstrate that low pressure (e.g. P < 10 MPa or 1500 PSI) burn rates can be quite different than the elevated pressure deflagration rate measurements (see References and HPP results discussed herein), hence elevated pressure measurements are necessary in order understand the deflagration behavior under relevant conditions. Previous work on explosives have shown that at 100's of MPa some explosives will transition from a laminar burn mechanism to a convective burn mechanism in a process termed deconsolidative burning. The resulting burn rates that are orders-of-magnitude faster than the laminar burn rates. Materials that transition to the deconsolidative-convective burn mechanism at elevated pressures have been shown to be considerably more violent in confined heating experiments (i.e. cook-off scenarios). The mechanisms of propellant and explosive deflagration are extremely complex and include both chemical, and mechanical processes, hence predicting the behavior and rate of a novel material or formulation is difficult if not impossible. In this work, the AP/HTPB based material, TAL-1503 (B-2049), was burned in a constant volume apparatus in argon up to 300 MPa (ca. 44 kPSI). The burn rate and pressure were measured in-situ and used to calculate a pressure dependent burn rate. In general, the material appears to burn in a laminar fashion at these elevated pressures. The experiment was reproduced multiple times and the burn rate law using the best data is B = (0.6 {+-} 0.1) x P{sup (1.05{+-}0.02)} where B is the burn rate in mm/s and P is the pressure in units of MPa. Details of the experimental method, results and data analysis are discussed herein and briefly compared to other AP based materials that have been measured in this apparatus.

  10. 2004 Rate Adjustments

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

    for Transmission and Ancillary Services Federal Register Notice -- Rate Order WAPA-141: Notice of Extension of Formula Rates for Transmission and Ancillary Services If you have any...

  11. Rate Schedule CPP-2

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

    points established by contract, in accordance with approved policies and procedures. Formula Rate: The formula rate for CPP includes three components: Component 1: The customer...

  12. Tier 2 Vintage Rate Workshop II

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

    Rates. These are intended to be based on specific resource costs for customers that need power to be based on specific resource types (e.g., renewable) or that want to know more...

  13. INVESTIGATION Genomic Background and Generation Time

    E-Print Network [OSTI]

    Lynch, Michael

    INVESTIGATION Genomic Background and Generation Time Influence Deleterious Mutation Rates variation is generated and how selection shapes mutation rates over evolutionary time requires knowledge, genomic background and generation time, on deleterious mutation in Daphnia pulicaria, a cyclically

  14. Multivariate phase space reconstruction by nearest neighbor embedding with different time delays

    E-Print Network [OSTI]

    Sara P. Garcia; Jonas S. Almeida

    2006-09-12

    A recently proposed nearest neighbor based selection of time delays for phase space reconstruction is extended to multivariate time series, with an iterative selection of variables and time delays. A case study of numerically generated solutions of the x- and z coordinates of the Lorenz system, and an application to heart rate and respiration data, are used for illustration.

  15. Air pollution: Coal based power plants major culprit : HindustanTimes.com http://www.hindustantimes.com/news/5922_1646830,001500250000000... 1 of 2 3/10/2006 7:45 AM

    E-Print Network [OSTI]

    Singh, Ramesh P.

    Air pollution: Coal based power plants major culprit : HindustanTimes.com http 1 Front » Story Air pollution: Coal based power plants major culprit HT Correspondent Kanpur, March that coal based thermal power plants are the main source for air pollution. The fact came to the fore during

  16. Spontaneous emission rates of dipoles in photonic crystal membranes

    E-Print Network [OSTI]

    Spontaneous emission rates of dipoles in photonic crystal membranes A. Femius Koenderink Laboratory-difference time-domain calculations show over 7 times inhibition and 15 times enhancement of the emission rate compared with vacuum for judi- ciously oriented and positioned dipoles. Emission rate modifications inside

  17. A novel method for the line-of-response and time-of-flight reconstruction in TOF-PET detectors based on a library of synchronized model signals

    E-Print Network [OSTI]

    P. Moskal; N. Zo?; T. Bednarski; P. Bia?as; E. Czerwi?ski; A. Gajos; D. Kami?ska; ?. Kap?on; A. Kochanowski; G. Korcyl; J. Kowal; P. Kowalski; T. Kozik; W. Krzemie?; E. Kubicz; Sz. Nied?wiecki; M. Pa?ka; L. Raczy?ski; Z. Rudy; O. Rundel; P. Salabura; N. G. Sharma; M. Silarski; A. S?omski; J. Smyrski; A. Strzelecki; A. Wieczorek; W. Wi?licki; M. Zieli?ski

    2015-02-10

    A novel method of hit time and hit position reconstruction in scintillator detectors is described. The method is based on comparison of detector signals with results stored in a library of synchronized model signals registered for a set of well-defined positions of scintillation points. The hit position is reconstructed as the one corresponding to the signal from the library which is most similar to the measurement signal. The time of the interaction is determined as a relative time between the measured signal and the most similar one in the library. A degree of similarity of measured and model signals is defined as the distance between points representing the measurement- and model-signal in the multi-dimensional measurement space. Novelty of the method lies also in the proposed way of synchronization of model signals enabling direct determination of the difference between time-of-flights (TOF) of annihilation quanta from the annihilation point to the detectors. The introduced method was validated using experimental data obtained by means of the double strip prototype of the J-PET detector and $^{22}$Na sodium isotope as a source of annihilation gamma quanta.The detector was built out from plastic scintillator strips with dimensions of 5 mm x 19 mm x 300 mm, optically connected at both sides to photomultipliers,from which signals were sampled by means of the Serial Data Analyzer.Using the introduced method, the spatial and TOF resolution of about 1.3 cm ($\\sigma$) and 125 ps ($\\sigma$) were established, respectively.

  18. PBXN-9 Ignition Kinetics and Deflagration Rates

    SciTech Connect (OSTI)

    Glascoe, E; Maienschein, J; Burnham, A; Koerner, J; Hsu, P; Wemhoff, A

    2008-04-24

    The ignition kinetics and deflagration rates of PBXN-9 were measured using specially designed instruments at LLNL and compared with previous work on similar HMX based materials. Ignition kinetics were measured based on the One Dimensional Time-to-Explosion combined with ALE3D modeling. Results of these experiments indicate that PBXN-9 behaves much like other HMX based materials (i.e. LX-04, LX-07, LX-10 and PBX-9501) and the dominant factor in these experiments is the type of explosive, not the type of binder/plasticizer. In contrast, the deflagration behavior of PBXN-9 is quite different from similar high weight percent HMX based materials (i.e LX-10, LX-07 and PBX-9501). PBXN-9 burns in a laminar manner over the full pressure range studied (0-310 MPa) unlike LX-10, LX-07, and PBX-9501. The difference in deflagration behavior is attributed to the nature of the binder/plasticizer alone or in conjunction with the volume of binder present in PBXN-9.

  19. Total ionizing dose effects of domestic SiGe HBTs under different dose rate

    E-Print Network [OSTI]

    Mo-Han, Liu; Wu-Ying, Ma; Xin, Wang; Qi, Guo; Cheng-Fa, He; Ke, Jiang; Xiao-Long, Li; Ming-Zhu, Xiong

    2015-01-01

    The total ionizing radiation (TID) response of commercial NPN silicon germanium hetero-junction bipolar transistors (SiGe HBTs) produced domestic were investigated under the dose rate of 800mGy(Si)/s and 1.3mGy(Si)/s with Co-60 gamma irradiation source, respectively. The changes of the transistor parameter such as Gummel characteristics, excess base current before and after irradiation are investigated. The results of the experiments shows that for the KT1151, the radiation damage have slightly difference under the different dose rate after the prolonged annealing, shows an time dependent effect(TDE). But for the KT9041, the degradations of low dose rate irradiation are more higher than the high dose rate, demonstrate that there have potential enhanced low dose rate sensitive(ELDRS) effect exist on KT9041. The underlying physical mechanisms of the different dose rates response induced by the gamma ray are detailed discussed.

  20. Lesson 22 Related Rates

    E-Print Network [OSTI]

    2013-10-11

    Oct 11, 2013 ... A spherical weather balloon is being inflated with helium at a rate of 82 cubic meters per minute. Find the rate at which its radius is increasing.

  1. Naughton's related rates problems

    E-Print Network [OSTI]

    dominic

    2013-02-25

    Related rates (1). (1) Oil spills from a rupture container in a circular pattern whose radius increases at a rate of 2 ft/s. How fast is the area of the oil spill increasing ...

  2. Spot evolution on the red giant star XX Triangulum. A starspot-decay analysis based on time-series Doppler imaging

    E-Print Network [OSTI]

    Künstler, A; Strassmeier, K G

    2015-01-01

    Solar spots appear to decay linearly proportional to their size. The decay rate of solar spots is directly related to magnetic diffusivity, which itself is a key quantity for the length of a magnetic-activity cycle. Is a linear spot decay also seen on other stars, and is this in agreement with the large range of solar and stellar activity cycle lengths? We investigate the evolution of starspots on the rapidly-rotating ($P_{\\rm rot}$ $\\approx$ 24 d) K0 giant XX Tri, using consecutive time-series Doppler images. Our aim is to obtain a well-sampled movie of the stellar surface over many years, and thereby detect and quantify a starspot decay law for further comparison with the Sun. We obtained continuous high-resolution and phase-resolved spectroscopy with the 1.2-m robotic STELLA telescope on Tenerife over six years. For each observing season, we obtained between 5 to 7 independent Doppler images, one per stellar rotation, making up a total of 36 maps. To quantify starspot area decay and growth, we match the ob...

  3. The Origin of the Solar Flare Waiting-Time Distribution

    E-Print Network [OSTI]

    M. S. Wheatland

    2000-05-08

    It was recently pointed out that the distribution of times between solar flares (the flare waiting-time distribution) follows a power law, for long waiting times. Based on 25 years of soft X-ray flares observed by Geostationary Operational Environmental Satellite (GOES) instruments it is shown that 1. the waiting-time distribution of flares is consistent with a time-dependent Poisson process, and 2. the fraction of time the Sun spends with different flaring rates approximately follows an exponential distribution. The second result is a new phenomenological law for flares. It is shown analytically how the observed power-law behavior of the waiting times originates in the exponential distribution of flaring rates. These results are argued to be consistent with a non-stationary avalanche model for flares.

  4. Simple rate-adaptive LDPC coding for quantum key distribution

    E-Print Network [OSTI]

    Mo Li; Chun-Mei Zhang; Zhen-Qiang Yin; Wei Chen; Chuan Wang; Zheng-Fu Han

    2015-05-24

    Although quantum key distribution (QKD) comes from the development of quantum theory, the implementation of a practical QKD system does involve a lot of classical process, such as key reconciliation and privacy amplification, which is called post-processing. Post-processing has been a crucial element to high speed QKD systems, even the bottleneck of it because of its relatively high time consumption. Low density parity check (LDPC) is now becoming a promising approach of overcoming the bottleneck due to its good performance in processing throughput. In this article we propose and simulate an easily implemented but efficiently rate-adaptive LDPC coding approach of reconciliation, different from the previously proposed puncturing- and shortening-based approach. We also give a measure for choosing the optimal LDPC parameter for our rate-adaptive approach according to error rates.

  5. Cooling rate, heating rate, and aging effects in glassy water Nicolas Giovambattista,1

    E-Print Network [OSTI]

    Sciortino, Francesco

    Cooling rate, heating rate, and aging effects in glassy water Nicolas Giovambattista,1 H. Eugene of water molecules during the process of generating a glass by cooling, and during the process on the cooling/heating rates as well as on the role of aging (the time elapsed in the glass state). We compare

  6. Ultrasound radio-frequency time series for finding malignant breast lesions

    E-Print Network [OSTI]

    Freitas, Nando de

    -based solutions for breast lesion characterization to reduce the patient recall rate after mammography screening. In this work, ultrasound radio frequency time series analysis is performed for sepa- rating benign framework can help in differentiating malignant from benign breast lesions. 1 Introduction In the United

  7. Charged-Particle Thermonuclear Reaction Rates: I. Monte Carlo Method and Statistical Distributions

    E-Print Network [OSTI]

    Richard Longland; Christian Iliadis; Art Champagne; Joe Newton; Claudio Ugalde; Alain Coc; Ryan Fitzgerald

    2010-04-23

    A method based on Monte Carlo techniques is presented for evaluating thermonuclear reaction rates. We begin by reviewing commonly applied procedures and point out that reaction rates that have been reported up to now in the literature have no rigorous statistical meaning. Subsequently, we associate each nuclear physics quantity entering in the calculation of reaction rates with a specific probability density function, including Gaussian, lognormal and chi-squared distributions. Based on these probability density functions the total reaction rate is randomly sampled many times until the required statistical precision is achieved. This procedure results in a median (Monte Carlo) rate which agrees under certain conditions with the commonly reported recommended "classical" rate. In addition, we present at each temperature a low rate and a high rate, corresponding to the 0.16 and 0.84 quantiles of the cumulative reaction rate distribution. These quantities are in general different from the statistically meaningless "minimum" (or "lower limit") and "maximum" (or "upper limit") reaction rates which are commonly reported. Furthermore, we approximate the output reaction rate probability density function by a lognormal distribution and present, at each temperature, the lognormal parameters miu and sigma. The values of these quantities will be crucial for future Monte Carlo nucleosynthesis studies. Our new reaction rates, appropriate for bare nuclei in the laboratory, are tabulated in the second paper of this series (Paper II). The nuclear physics input used to derive our reaction rates is presented in the third paper of this series (Paper III). In the fourth paper of this series (Paper IV) we compare our new reaction rates to previous results.

  8. Bursty Traffic over CDMA: Predictive MAI Temporal Structure, Rate Control and Admission Control

    E-Print Network [OSTI]

    Zhang, Junshan

    's capacity laws [30]. Hence, in the wireless environment, one has to very carefully engineer the network the predictive MAI structure to construct a multiple time-scale interference predictor. Rate adaptation perspective based on marginal distributions). This approach cuts across the physical layer, medium access

  9. Proportional Fairness in Multi-rate Wireless LANs Li (Erran) Li

    E-Print Network [OSTI]

    Li, Li Erran

    Proportional Fairness in Multi-rate Wireless LANs Li (Erran) Li Martin Pal ¡ Yang Richard Yang throughput while serving users in a fair manner, proportional fair or time-based fair scheduling has been consist of a network of APs, this paper considers proportional fairness in this much wider setting. Our

  10. Essays on exchange rates and electricity demand

    E-Print Network [OSTI]

    Li, Xiangming, 1966-

    1999-01-01

    This thesis examines two important issues in economic development: exchange rates and electricity demand and addresses methodological issues of using time series and panel data analysis to investigate important policy ...

  11. Resonant thermonuclear reaction rate

    SciTech Connect (OSTI)

    Haubold, H.J.; Mathai, A.M.

    1986-08-01

    Basic physical principles for the resonant and nonresonant thermonuclear reaction rates are applied to find their standard representations for nuclear astrophysics. Closed-form representations for the resonant reaction rate are derived in terms of Meijer's G-italic-function. Analytic representations of the resonant and nonresonant nuclear reaction rates are compared and the appearance of Meijer's G-italic-function is discussed in physical terms.

  12. LCC Guidance Rates

    Office of Energy Efficiency and Renewable Energy (EERE)

    Notepad text file provides the LCC guidance rates in a numbered format for the various regions throughout the U.S.

  13. Theoretical mass loss rates of cool main-sequence stars

    E-Print Network [OSTI]

    V. Holzwarth; M. Jardine

    2006-11-14

    We develop a model for the wind properties of cool main-sequence stars, which comprises their wind ram pressures, mass fluxes, and terminal wind velocities. The wind properties are determined through a polytropic magnetised wind model, assuming power laws for the dependence of the thermal and magnetic wind parameters on the stellar rotation rate. We use empirical data to constrain theoretical wind scenarios, which are characterised by different rates of increase of the wind temperature, wind density, and magnetic field strength. Scenarios based on moderate rates of increase yield wind ram pressures in agreement with most empirical constraints, but cannot account for some moderately rotating targets, whose high apparent mass loss rates are inconsistent with observed coronal X-ray and magnetic properties. For fast magnetic rotators, the magneto-centrifugal driving of the outflow can produce terminal wind velocities far in excess of the surface escape velocity. Disregarding this aspect in the analyses of wind ram pressures leads to overestimations of stellar mass loss rates. The predicted mass loss rates of cool main-sequence stars do not exceed about ten times the solar value. Our results are in contrast with previous investigations, which found a strong increase of the stellar mass loss rates with the coronal X-ray flux. Owing to the weaker dependence, we expect the impact of stellar winds on planetary atmospheres to be less severe and the detectability of magnetospheric radio emission to be lower then previously suggested. Considering the rotational evolution of a one solar-mass star, the mass loss rates and the wind ram pressures are highest during the pre-main sequence phase.

  14. The effect of additives on lime dissolution rates. Final report

    SciTech Connect (OSTI)

    Khang, S.J.

    1996-07-31

    Based on the previous years` studies concerning the efficiency of SO{sub 2} removal by spray dryers with high sulfur coal flue gas, the work for year five included investigations of lime dissolution rates at different slaking conditions and with the effect of additives. The prominent additives that have significant effects on lime dissolution rates were tested with the mini pilot spray drying absorber to see their effects on spray drying desulfurization applications. The mechanisms of these additive effects along with the properties of hygroscopic additives have been discussed and incorporated into the spray drying desulfurization model ``SPRAYMOD-M.`` Slaking conditions are very important factors in producing high quality lime slurry in spray drying desulfurization processes. At optimal slaking conditions, the slaked lime particles are very fine (3-5{mu}m) and the slaked lime has high BET surface areas which are beneficial to the desulfurization. The slaked lime dissolution rate experiments in our study are designed to determine how much lime can dissolve in a unit time if the initial lime surface area is kept constant. The purpose of the dissolution rate study for different additives is to find those effective additives that can enhance lime dissolution rates and to investigate the mechanisms of the dissolution rate enhancement properties for these additives. The applications of these additives on spray drying desulfurization are to further verify the theory that dissolution rate is a rate limiting step in the whole spray drying desulfurization process as well as to test the feasibility of these additives on enhancing SO{sub 2} removal in spray dryers.

  15. A Computational Analysis of Smart Timing Decisions for Heating Based on an Air-to-Water Heat pump SMARTER EUROPE E-world energy & water 2014 Proceedings page 1

    E-Print Network [OSTI]

    Treur, Jan

    A Computational Analysis of Smart Timing Decisions for Heating Based on an Air-to-Water Heat pump Decisions for Heating Based on an Air-to-Water Heat pump Jan Treur VU University Amsterdam, Agent Systems be most efficient to use this energy in these periods. For air to water heat pumps a similar issue occurs

  16. Polycyclic Aromatic Hydrocarbon Biodegradation Rates: A

    E-Print Network [OSTI]

    Peters, Catherine A.

    Polycyclic Aromatic Hydrocarbon Biodegradation Rates: A Structure-Based Study K R I S T I N E H . W structure in determining the biodegradation rates of polycyclic aromatic hydrocarbons (PAHs). Laboratory. Introduction Polycyclic aromatic hydrocarbons (PAHs) are a class of organic pollutants that are commonly found

  17. Revisions to the SRCC Rating Process for Solar Water Heaters: Preprint

    SciTech Connect (OSTI)

    Burch, J.; Huggins, J.; Long, S.; Thornton, J.

    2012-06-01

    In the United States, annual performance ratings for solar water heaters are computed with component-based simulation models driven by typical meteorological year weather and specified water draw. Changes in the process are being implemented to enhance credibility through increased transparency and accuracy. Changes to the process include using a graphical rather than text-based model-building tool, performing analytical tests on all components and systems, checking energy balances on every component, loop, and system at every time step, comparing the results to detect outliers and potential errors, and documenting the modeling process in detail. Examples of changes in ratings are shown, along with analytical and comparative testing results.

  18. Rate Schedule CV-F13

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

    for the entire FY. The PRR is allocated to FP Customers and BR Customers based on formula rates, as adjusted for Hourly Exchange (HE), FP true-up calculation, and midyear...

  19. Analytical Improvements in PV Degradation Rate Determination

    SciTech Connect (OSTI)

    Jordan, D. C.; Kurtz, S. R.

    2011-02-01

    As photovoltaic (PV) penetration of the power grid increases, it becomes vital to know how decreased power output may affect cost over time. In order to predict power delivery, the decline or degradation rates must be determined accurately. For non-spectrally corrected data several complete seasonal cycles (typically 3-5 years) are required to obtain reasonably accurate degradation rates. In a rapidly evolving industry such a time span is often unacceptable and the need exists to determine degradation rates accurately in a shorter period of time. Occurrence of outliers and data shifts are two examples of analytical problems leading to greater uncertainty and therefore to longer observation times. In this paper we compare three methodologies of data analysis for robustness in the presence of outliers, data shifts and shorter measurement time periods.

  20. Real-time volumetric image reconstruction and 3D tumor localization based on a single x-ray projection image for lung cancer radiotherapy

    E-Print Network [OSTI]

    Li, Ruijiang; Lewis, John H; Gu, Xuejun; Folkerts, Michael; Men, Chunhua; Jiang, Steve B

    2010-01-01

    Purpose: To develop an algorithm for real-time volumetric image reconstruction and 3D tumor localization based on a single x-ray projection image for lung cancer radiotherapy. Methods: Given a set of volumetric images of a patient at N breathing phases as the training data, we perform deformable image registration between a reference phase and the other N-1 phases, resulting in N-1 deformation vector fields (DVFs). These DVFs can be represented efficiently by a few eigenvectors and coefficients obtained from principal component analysis (PCA). By varying the PCA coefficients, we can generate new DVFs, which, when applied on the reference image, lead to new volumetric images. We then can reconstruct a volumetric image from a single projection image by optimizing the PCA coefficients such that its computed projection matches the measured one. The 3D location of the tumor can be derived by applying the inverted DVF on its position in the reference image. Our algorithm was implemented on graphics processing units...

  1. Case Study 1: Adjustable-Rate Home Mortgage Loan

    E-Print Network [OSTI]

    Colton, Jonathan S.

    . The disadvantage is that lenders usually charge a higher interest rate for these loans than for adjustable rate, and they are used by lenders to determine the mortgage loans's new interest rate at the time of adjustment. The two lenders use one-year T-bill yields as their indexes. The T-bill rate tends to uctuate much more

  2. Power Rate Cases (pbl/rates)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeedingProgram Guidelines This document w w w.pv - te ch.orgPower PlantRates >

  3. Power Rates Announcements (pbl/rates)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeedingProgram Guidelines This document w w w.pv - te ch.orgPower PlantRates >

  4. Rates Meetings and Workshops (pbl/rates)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100 Winners * Impacts on GlobalRachel2RateCaseElements Sign In About | FY

  5. Previous Power Rates (rates/current)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-Rich Matrices in Hydrothermal PlumesPress1,Previous EventsRates

  6. Photovoltaic Degradation Rates -- An Analytical Review

    SciTech Connect (OSTI)

    Jordan, D. C.; Kurtz, S. R.

    2012-06-01

    As photovoltaic penetration of the power grid increases, accurate predictions of return on investment require accurate prediction of decreased power output over time. Degradation rates must be known in order to predict power delivery. This article reviews degradation rates of flat-plate terrestrial modules and systems reported in published literature from field testing throughout the last 40 years. Nearly 2000 degradation rates, measured on individual modules or entire systems, have been assembled from the literature, showing a median value of 0.5%/year. The review consists of three parts: a brief historical outline, an analytical summary of degradation rates, and a detailed bibliography partitioned by technology.

  7. Cooling rate, heating rate and aging effects in glassy water

    E-Print Network [OSTI]

    Nicolas Giovambattista; H. Eugene Stanley; Francesco Sciortino

    2004-03-03

    We report a molecular dynamics simulation study of the properties of the potential energy landscape sampled by a system of water molecules during the process of generating a glass by cooling, and during the process of regenerating the equilibrium liquid by heating the glass. We study the dependence of these processes on the cooling/heating rates as well as on the role of aging (the time elapsed in the glass state). We compare the properties of the potential energy landscape sampled during these processes with the corresponding properties sampled in the liquid equilibrium state to elucidate under which conditions glass configurations can be associated with equilibrium liquid configurations.

  8. Space time and the passage of time

    E-Print Network [OSTI]

    George F. R. Ellis; Rituparno Goswami

    2012-08-26

    This paper examines the various arguments that have been put forward suggesting either that time does not exist, or that it exists but its flow is not real. I argue that (i) time both exists and flows; (ii) an Evolving Block Universe (`EBU') model of spacetime adequately captures this feature, emphasizing the key differences between the past, present, and future; (iii) the associated surfaces of constant time are uniquely geometrically and physically determined in any realistic spacetime model based in General Relativity Theory; (iv) such a model is needed in order to capture the essential aspects of what is happening in circumstances where initial data does not uniquely determine the evolution of spacetime structure because quantum uncertainty plays a key role in that development. Assuming that the functioning of the mind is based in the physical brain, evidence from the way that the mind apprehends the flow of time prefers this evolving time model over those where there is no flow of time.

  9. Effective Rate Period

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

    Regulation and Frequency Response DollarsKW-month 4.56 CV-RFS4 Spinning Reserve The formula rate for spinning reserve service is the price consistent with the California...

  10. Effective Rate Period

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

    and Frequency Response DollarsKW-month 3.98 4.17 CV-RFS4 Spinning Reserve The formula rate for spinning reserve service is the price consistent with the California...

  11. Effective Rate Period

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

    and Frequency Response DollarsKW-month 4.17 4.56 CV-RFS4 Spinning Reserve The formula rate for spinning reserve service is the price consistent with the California...

  12. On Thermonuclear Reaction Rates

    E-Print Network [OSTI]

    H. J. Haubold; A. M. Mathai

    1996-12-02

    Nuclear reactions govern major aspects of the chemical evolution od galaxies and stars. Analytic study of the reaction rates and reaction probability integrals is attempted here. Exact expressions for the reaction rates and reaction probability integrals for nuclear reactions in the case of nonresonant, modified nonresonant, screened nonresonant and resonant cases are given. These are expressed in terms of H-functions, G-functions and in computable series forms. Computational aspects are also discussed.

  13. Model-Based Testing of Community-Driven Open-Source GUI Applications Qing Xie and Atif M. Memon

    E-Print Network [OSTI]

    Memon, Atif M.

    to the unprecedented code churn rates enabled by the WWW, developers may not have time to determine whether-the-clock evolution has led to unprecedented OSS code churn rates. For example, the OSS ACE+TAO [1] developers average 200+ CVS commits per week [8]. While successful at increasing code churn rates, web- based community

  14. Residence time distribution studies in a multiphase reactor under high temperature and pressure conditions

    SciTech Connect (OSTI)

    Nalitham, R.V.; Davies, O.L.

    1987-06-01

    The residence time distribution of the slurry phase in a coal liquefaction reactor is determined experimentally under high temperature and pressure conditions using native radioactive tracers. The experimental data are fitted to several exit age distribution models, and a model is selected based on the best fit. The effect of process conditions such as recycle gas rate, coal feed rate, reactor temperature, and solvent-to-coal ratio on the degree of backmixing and mean residence time is studied. Gas holdup is estimated from the experimental mean residence time, the nominal residence time, and the total reactor holdup. The effect of gas superficial velocity on gas holdup is studied.

  15. 14.2 AN UPDATE ON NEXRAD PROGRAM PLANS FOR COLLECTING AND DISTRIBUTING WSR-88D BASE DATA IN NEAR REAL TIME

    E-Print Network [OSTI]

    Droegemeier, Kelvin K.

    14.2 AN UPDATE ON NEXRAD PROGRAM PLANS FOR COLLECTING AND DISTRIBUTING WSR-88D BASE DATA IN NEAR and increased level of physics where the input of WSR-88D base data (aka Level II data) (Crum et al 1993 (NIDS) agreement has increased thegovernment'sflexibilitytoprovideWSR-88Dproduct and base data

  16. Growth Rates of Global Energy Systems and Future Outlooks

    SciTech Connect (OSTI)

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

    2012-03-15

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

  17. Time scales in LISA

    E-Print Network [OSTI]

    S. Pireaux

    2007-03-23

    The LISA mission is a space interferometer aiming at the detection of gravitational waves in the [$10^{-4}$,$10^{-1}$] Hz frequency band. In order to reach the gravitational wave detection level, a Time Delay Interferometry (TDI) method must be applied to get rid of (most of) the laser frequency noise and optical bench noise. This TDI analysis is carried out in terms of the coordinate time corresponding to the Barycentric Coordinate Reference System (BCRS), TCB, whereas the data at each of the three LISA stations is recorded in terms of each station proper time. We provide here the required proper time versus BCRS time transformation. We show that the difference in rate of station proper time versus TCB is of the order of $5 10^{-8}$. The difference between station proper times and TCB exhibits an oscillatory trend with a maximum amplitude of about $10^{-3}$ s.

  18. DENTAL RATES for Active Monthly Employees

    E-Print Network [OSTI]

    New Mexico, University of

    -time, your base salary is calculated on the full-time equivalent. For example, if you are at an appointment percentage of 50% and earn $12,000 per year, your base salary is $24,000 and UNM would contribute 40%. Delta Dental Premier (High Option) Annualized Salary $34,999 and below Annualized Salary $35,000 - $49

  19. Longshore sediment transport rate calculated incorporating wave orbital velocity fluctuations 

    E-Print Network [OSTI]

    Smith, Ernest Ray

    2006-10-30

    Laboratory experiments were performed to study and improve longshore sediment transport rate predictions. Measured total longshore transport in the laboratory was approximately three times greater for plunging breakers ...

  20. Calculating infinite-medium ?-eigenvalue spectra with Monte Carlo using a transition rate matrix method

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

    Betzler, Benjamin R.; Kiedrowski, Brian C.; Brown, Forrest B.; Martin, William R.

    2015-08-28

    The time-dependent behavior of the energy spectrum in neutron transport was investigated with a formulation, based on continuous-time Markov processes, for computing ? eigenvalues and eigenvectors in an infinite medium. In this study, a research Monte Carlo code called “TORTE” (To Obtain Real Time Eigenvalues) was created and used to estimate elements of a transition rate matrix. TORTE is capable of using both multigroup and continuous-energy nuclear data, and verification was performed. Eigenvalue spectra for infinite homogeneous mixtures were obtained, and an eigenfunction expansion was used to investigate transient behavior of the neutron energy spectrum.

  1. Modeling of time dependence of hole current and prediction of QBD and tBD for thin gate MOS devices based upon

    E-Print Network [OSTI]

    Schroder, Dieter K.

    near the hole charge trapped interface during F±N tunneling of electrons. The ®eld at the localized yield, ®rst order trapping kinetics and dierent tunneling conditions for determining the time variation for evaluating the time dependence of injected electron and generated substrate hole current under constant

  2. The rates of Type Ia Supernovae. I. Analytical Formulations

    E-Print Network [OSTI]

    Laura Greggio

    2005-04-29

    This paper provides a handy tool to compute the impact of Type Ia Supernova (SNIa) on the evolution of stellar systems. An effective formalism is presented to couple the SNIa rate to the star formation history, which rests upon the definition of two key properties of the progenitor's model: the realization probability of the SNIa event from a single stellar generation and the distribution function of the delay times. It is shown that the current SNIa rate in late type galaxies implies that the realization probability is on the order of 0.001. Analytical formulations for the distribution function of the delay times for Single (SD) and Double Degenerate (DD) progenitors are derived, based on stellar evolution arguments. These formulations, which agree well with the results of Monte Carlo simulations for the evolution of close binaries, have a built in parametrization of the key properties of the alternative candidates. The various models for the progenitors have different impact on the large scales. In particular, the paper examines the systematic trend of the SNIa rate per unit mass with the color of the parent galaxy, and shows that the recent observations favor the DD model. The SD scenario can reproduce the data only if the distribution of the primordial mass ratios is flat, and the accretion efficiency onto the WD is close to 100%. The timescale for the Fe release from SNIa to the interstellar medium ranges between 0.3 and 3 Gyr for a wide variety of hypothesis on the SNIa progenitors. (ABRIDGED)

  3. Bunch mode specific rate corrections for PILATUS3 detectors

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

    Trueb, P.; Dejoie, C.; Kobas, M.; Pattison, P.; Peake, D. J.; Radicci, V.; Sobott, B. A.; Walko, D. A.; Broennimann, C.

    2015-04-09

    PILATUS X-ray detectors are in operation at many synchrotron beamlines around the world. This article reports on the characterization of the new PILATUS3 detector generation at high count rates. As for all counting detectors, the measured intensities have to be corrected for the dead-time of the counting mechanism at high photon fluxes. The large number of different bunch modes at these synchrotrons as well as the wide range of detector settings presents a challenge for providing accurate corrections. To avoid the intricate measurement of the count rate behaviour for every bunch mode, a Monte Carlo simulation of the counting mechanismmore »has been implemented, which is able to predict the corrections for arbitrary bunch modes and a wide range of detector settings. This article compares the simulated results with experimental data acquired at different synchrotrons. It is found that the usage of bunch mode specific corrections based on this simulation improves the accuracy of the measured intensities by up to 40% for high photon rates and highly structured bunch modes. For less structured bunch modes, the instant retrigger technology of PILATUS3 detectors substantially reduces the dependency of the rate correction on the bunch mode. The acquired data also demonstrate that the instant retrigger technology allows for data acquisition up to 15 million photons per second per pixel.« less

  4. Dose Rate Analysis Capability for Actual Spent Fuel Transportation Cask Contents

    SciTech Connect (OSTI)

    Radulescu, Georgeta; Lefebvre, Robert A; Peplow, Douglas E.; Williams, Mark L; Scaglione, John M

    2014-01-01

    The approved contents for a U.S. Nuclear Regulatory Commission (NRC) licensed spent nuclear fuel casks are typically based on bounding used nuclear fuel (UNF) characteristics. However, the contents of the UNF canisters currently in storage at independent spent fuel storage installations are considerably heterogeneous in terms of fuel assembly burnup, initial enrichment, decay time, cladding integrity, etc. Used Nuclear Fuel Storage, Transportation & Disposal Analysis Resource and Data System (UNF ST&DARDS) is an integrated data and analysis system that facilitates automated cask-specific safety analyses based on actual characteristics of the as-loaded UNF. The UNF-ST&DARDS analysis capabilities have been recently expanded to include dose rate analysis of as-loaded transportation packages. Realistic dose rate values based on actual canister contents may be used in place of bounding dose rate values to support development of repackaging operations procedures, evaluation of radiation-related transportation risks, and communication with stakeholders. This paper describes the UNF-ST&DARDS dose rate analysis methodology based on actual UNF canister contents and presents sample dose rate calculation results.

  5. A Low-Cost Real-Time Mobile Robot Platform (ArEduBot) to support Project-Based Learning in

    E-Print Network [OSTI]

    Krovi, Venkat

    & Mechatronics Ilya B. Gartseev#1 , Leng-Feng Lee*2 , and Venkat N. Krovi*3 # Moscow State Technical University in introductory robotics and mechatronics classes, to complement the lecture and to support project-based learning created using this framework. Keywords-- project-based learning, mechatronics, robotics, arduino, simulink

  6. A multi-sensor physically based weather/non-weather radar echo classifier using polarimetric and environmental data in a real-time

    E-Print Network [OSTI]

    Lakshmanan, Valliappa

    A multi-sensor physically based weather/non-weather radar echo classifier using polarimetric-hydrometeors. In this work, a multi-sensor physically based algorithm is designed to classify weather/non-weather radar, 2004). Manual quality control (QC) of radar reflectivity data has been practiced at commercial weather

  7. A 78 dB SNDR 87 mW 20 MHz Bandwidth Continuous-Time Delta Sigma ADC With VCO-Based Integrator and Quantizer Implemented in 0.13 mu m CMOS

    E-Print Network [OSTI]

    Park, Matthew

    The use of a VCO-based integrator and quantizer within a continuous-time (CT) \\Delta \\Sigma analog-to-digital converter (ADC) structure is explored, and a custom prototype in a 0.13 \\mum CMOS with a measured performance ...

  8. Molecular beacon-based real-time PCR detection of primary isolates of Salmonella Typhimurium and Salmonella Enteritidis in environmental and clinical samples

    E-Print Network [OSTI]

    Hadjinicolaou, Andreas V.; Demetriou, Victoria L.; Emmanuel, Maria A.; Kakoyiannis, Charalambos K.; Kostrikis, Leondios G.

    2009-05-19

    Abstract Background A fast and simple two-step multiplex real-time PCR assay has been developed to replace the traditional, laborious Salmonella serotyping procedure. Molecular beacons were incorporated into the assay as probes for target DNA...

  9. EERE Peer Review Guide, Appendix K Sample Rating Summary Sheet

    SciTech Connect (OSTI)

    None

    2009-01-18

    A peer review sample summary rating sheet, from the September 2002 The Peer Review Process Handbook, an Implementation Manual based on the Superconductivity Program Experience.

  10. Generation of high-stability solitons at microwave rates on a silicon chip

    E-Print Network [OSTI]

    Yi, Xu; Yang, Ki Youl; Suh, Myoung-Gyun; Vahala, Kerry

    2015-01-01

    Because they coherently link radio/microwave-rate electrical signals with optical-rate signals derived from lasers and atomic transitions, frequency combs are having a remarkably broad impact on science and technology. Integrating these systems on a photonic chip would revolutionize instrumentation, time keeping, spectroscopy, navigation and potentially create new mass-market applications. A key element of such a system-on-a-chip will be a mode-locked comb that can be self-referenced. The recent demonstration of soliton pulses from a microresonator has placed this goal within reach. However, to provide the requisite link between microwave and optical rate signals soliton generation must occur within the bandwidth of electronic devices. So far this is possible in crytalline devices, but not chip-based devices. Here, a monolithic comb that generates electronic-rate soliton pulses is demonstrated.

  11. Drug Retention Times

    SciTech Connect (OSTI)

    Center for Human Reliability Studies

    2007-05-01

    The purpose of this monograph is to provide information on drug retention times in the human body. The information provided is based on plausible illegal drug use activities that might be engaged in by a recreational drug user

  12. Drug Retention Times

    SciTech Connect (OSTI)

    Center for Human Reliability Studies

    2007-05-01

    The purpose of this monograph is to provide information on drug retention times in the human body. The information provided is based on plausible illegal drug use activities that might be engaged in by a recreational drug user.

  13. Rotational rate sensor

    DOE Patents [OSTI]

    Hunter, Steven L. (Livermore, CA)

    2002-01-01

    A rate sensor for angular/rotational acceleration includes a housing defining a fluid cavity essentially completely filled with an electrolyte fluid. Within the housing, such as a toroid, ions in the fluid are swept during movement from an excitation electrode toward one of two output electrodes to provide a signal for directional rotation. One or more ground electrodes within the housing serve to neutralize ions, thus preventing any effect at the other output electrode.

  14. Time Valid One-Time Signature for Time-Critical Multicast Data Authentication

    E-Print Network [OSTI]

    Nahrstedt, Klara

    malicious attacks. In this paper, we propose a novel signature model ­ Time Valid One-Time Signature (TVTime Valid One-Time Signature for Time-Critical Multicast Data Authentication Qiyan Wang, Himanshu-OTS) ­ to boost the efficiency of regular one-time signature schemes. Based on the TV-OTS model, we design

  15. Modelling Time

    E-Print Network [OSTI]

    Burra G. Sidharth

    2008-09-03

    We briefly review two concepts of time - the usual time associated with "being" and more recent ideas, answering to the description of "becoming". The approximation involved in the former is examined. Finally we argue that it is (unpredictable) fluctuations that underlie time.

  16. 217 km long distance photon-counting optical time-domain reflectometry based on ultra-low noise up-conversion single photon detector

    E-Print Network [OSTI]

    Guo-Liang Shentu; Qi-Chao Sun; Xiao Jiang; Xiao-Dong Wang; Jason S. Pelc; M. M. Fejer; Qiang Zhang; Jian-Wei Pan

    2013-08-05

    We demonstrate a photon-counting optical time-domain reflectometry with 42.19 dB dynamic range using an ultra-low noise up-conversion single photon detector. By employing the long wave pump technique and a volume Bragg grating, we reduce the noise of our up-conversion single photon detector, and achieve a noise equivalent power of -139.7 dBm/sqrt(Hz). We perform the OTDR experiments using a fiber of length 216.95 km, and show that our system can identify defects along the entire fiber length with a distance resolution better than 10 cm in a measurement time of 13 minutes.

  17. ADITYA KARNIK: PERFORMANCE OF TCP WITH EXPLICIT RATE FEEDBACK 1 Performance of TCP Congestion Control with Explicit Rate Feedback

    E-Print Network [OSTI]

    Kumar, Anurag

    directly to the individual TCP sources, and study a policy for utilizing this rate information in TCP on this rate feed­ back and a round­trip­time (RTT) estimate. Thus our concern in this paper is to studyADITYA KARNIK: PERFORMANCE OF TCP WITH EXPLICIT RATE FEEDBACK 1 Performance of TCP Congestion

  18. Measurement of the rate of stellar tidal disruption flares

    SciTech Connect (OSTI)

    Van Velzen, Sjoert

    2014-09-01

    We report an observational estimate of the rate of stellar tidal disruption flares (TDFs) in inactive galaxies based on a successful search for these events among transients in galaxies using archival Sloan Digital Sky Survey (SDSS) multi-epoch imaging data (Stripe 82). This search yielded 186 nuclear flares in galaxies, 2 of which are excellent TDF candidates. Because of the systematic nature of the search, the very large number of galaxies, the long time of observation, and the fact that non-TDFs were excluded without resorting to assumptions about TDF characteristics, this study provides an unparalleled opportunity to measure the TDF rate. To compute the rate of optical stellar tidal disruption events, we simulate our entire pipeline to obtain the efficiency of detection. The rate depends on the light curves of TDFs, which are presently still poorly constrained. Using only the observed part of the SDSS light curves gives a model-independent upper limit to the optical TDF rate, N-dot <2×10{sup ?4} yr{sup ?1} galaxy{sup ?1} (90% CL), under the assumption that the SDSS TDFs are representative examples. We develop three empirical models of the light curves based on the two SDSS light curves and two more recent and better-sampled Pan-STARRS TDF light curves, leading to our best estimate of the rate: N-dot {sub TDF}=(1.5--2.0){sub ?1.3}{sup +2.7}×10{sup ?5} yr{sup ?1} galaxy{sup ?1}. We explore the modeling uncertainties by considering two theoretically motivated light curve models, as well as two different relationships between black hole mass and galaxy luminosity, and two different treatments of the cutoff in the visibility of TDFs at large M {sub BH}. From this we conclude that these sources of uncertainty are not significantly larger than the statistical ones. Our results are applicable for galaxies hosting black holes with mass in the range of a few 10{sup 6}-10{sup 8} M {sub ?}, and translates to a volumetric TDF rate of (4-8) × 10{sup –8±0.4} yr{sup –1} Mpc{sup –3}, with the statistical uncertainty in the exponent.

  19. Vocal Timing in the Bat 

    E-Print Network [OSTI]

    Jarvis, Jenna N

    2013-05-01

    respond to continuous noise by increasing their call rate, and that the switch between the responses to intermittent noise and continuous noise occurs at a duty cycle of 50% or higher. Overall, this dissertation establishes that bats alter the timing...

  20. Abstract--In this paper we describe our efforts to build a Web Services based architecture to support both real-time

    E-Print Network [OSTI]

    to support both real-time and archived geographic data in Geographical Information System (GIS) Grids. We IN GEOGRAPHICAL INFORMATION SERVICE GRIDS A. Open Standards for Geographical Information Systems It is estimated]. This is the major reason for enormous interest from industry and academia to develop Geographic Information System

  1. Abstract--We describe our efforts to build a Web Services based architecture to support access to both real-time and

    E-Print Network [OSTI]

    to both real-time and archived geographic data in Geographical Information System (GIS) Grids. We have IN GEOGRAPHICAL INFORMATION SERVICE GRIDS A. Open Standards for Geographical Information Systems It is estimated]. This is the major reason for enormous interest from industry and academia to develop Geographic Information System

  2. A comparison of diagnostic techniques for detecting salmonella spp in equine fecal samples using culture methods, gel-based pcr, and real-time pcr assays 

    E-Print Network [OSTI]

    Smith, Shelle Ann

    2007-09-17

    of presenting complaints .......................... 25 viii LIST OF TABLES TABLE Page 1 Sequence of PCR primers and probe .......................................................... 14 2 Salmonella... serogroups and serotypes detected by the real-time primer/probe sequence................................................................................ 17 3. Frequency and percent negative and positive for culture and PCR procedures...

  3. Quantum Time

    E-Print Network [OSTI]

    John Ashmead

    2010-05-05

    Normally we quantize along the space dimensions but treat time classically. But from relativity we expect a high level of symmetry between time and space. What happens if we quantize time using the same rules we use to quantize space? To do this, we generalize the paths in the Feynman path integral to include paths that vary in time as well as in space. We use Morlet wavelet decomposition to ensure convergence and normalization of the path integrals. We derive the Schr\\"odinger equation in four dimensions from the short time limit of the path integral expression. We verify that we recover standard quantum theory in the non-relativistic, semi-classical, and long time limits. Quantum time is an experiment factory: most foundational experiments in quantum mechanics can be modified in a way that makes them tests of quantum time. We look at single and double slits in time, scattering by time-varying electric and magnetic fields, and the Aharonov-Bohm effect in time.

  4. ARC: An Integrated Admission and Rate Control Framework for Competitive

    E-Print Network [OSTI]

    Chatterjee, Mainak

    . The implementation of Wireless Local Number Portability (WLNP) is expected to further increase the churn rate (the construct its game strategy set so as to maximize their utility (revenue) considering the churn rate. Based, even higher churn rate is predicted [38]. In fact, the statistics from 2003 show that most wireless

  5. Current Power Rates

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalent Bonding in ActinideRail betweenProtectionCurrentJobPower-Rates

  6. Rate Case Elements

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100 Winners * Impacts on GlobalRachel2RateCaseElements Sign In About | Careers |

  7. Rate Design and Renewables

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100 Winners * Impacts on GlobalRachel2RateCaseElements Sign In About | Careers

  8. Interruptible Electric Rates: Where We Are Today 

    E-Print Network [OSTI]

    Frees, R. J.

    1982-01-01

    of energy management. Within the past few years, time-of-use rates, for both industrial and residential users, have been touted as the answer to shaving peaks and filling valleys in a utility's load curve. Their effectiveness in doing so, however, is still...

  9. Uncertainty Analysis for Photovoltaic Degradation Rates (Poster)

    SciTech Connect (OSTI)

    Jordan, D.; Kurtz, S.; Hansen, C.

    2014-04-01

    Dependable and predictable energy production is the key to the long-term success of the PV industry. PV systems show over the lifetime of their exposure a gradual decline that depends on many different factors such as module technology, module type, mounting configuration, climate etc. When degradation rates are determined from continuous data the statistical uncertainty is easily calculated from the regression coefficients. However, total uncertainty that includes measurement uncertainty and instrumentation drift is far more difficult to determine. A Monte Carlo simulation approach was chosen to investigate a comprehensive uncertainty analysis. The most important effect for degradation rates is to avoid instrumentation that changes over time in the field. For instance, a drifting irradiance sensor, which can be achieved through regular calibration, can lead to a substantially erroneous degradation rates. However, the accuracy of the irradiance sensor has negligible impact on degradation rate uncertainty emphasizing that precision (relative accuracy) is more important than absolute accuracy.

  10. Wind accretion in binary stars II. Accretion rates

    E-Print Network [OSTI]

    Tom Theuns; Henri Boffin; Alain Jorissen

    1996-02-18

    Smoothed particle hydrodynamics (SPH) is used to estimate accretion rates of mass, linear and angular momentum in a binary system where one component undergoes mass loss through a wind. Physical parameters are chosen such as to model the alleged binary precursors of barium stars, whose chemical peculiarities are believed to result from the accretion of the wind from a companion formerly on the asymptotic giant branch (AGB). The binary system modelled consists of a 3 solar masses AGB star on the main sequence, in a 3AU circular orbit. Three-dimensional simulations are performed for gases with polytropic indices gamma=1, 1.1 and 1.5, to bracket more realistic situations that would include radiative cooling. Mass accretion rates are found to depend on resolution and we estimate typical values of 1-2% for the gamma=1.5 case and 8% for the other models. The highest resolution obtained (with 400k particles) corresponds to an accretor of linear size 16 solar radii. Despite being (in the gamma = 1.5 case) about ten times smaller than theoretical estimates based on the Bondi-Hoyle prescription, the SPH accretion rates remain large enough to explain the pollution of barium stars. Uncertainties in the current SPH rates remain however, due to the simplified treatment of the wind acceleration mechanism, as well as to the absence of any cooling prescription and to the limited numerical resolution. Angular momentum transfer leads to significant spin up of the accretor and can account for the rapid rotation of HD165141, a barium star with a young white dwarf companion and a rotation rate unusually large among K giants.

  11. ADJECTIVE RATINGS FOR FIRE BEHAVIOR For many years now in America we have used the National Fire Danger Rating System

    E-Print Network [OSTI]

    Danger Rating System (Deeming, et al, 1978) adjective ratings to describe the "fire danger" for a given of descriptive advice of the "danger" of having an ignition based on historic weather data for what kind of fire these ratings meant regarding potential fire behavior. Furthermore, they described "fire danger" which

  12. Anode initiated impulse breakdown in water: the dependence on pulse rise time for nanosecond and sub-nanosecond pulses and initiation mechanism based on electrostriction

    E-Print Network [OSTI]

    Seepersad, Yohan; Dobrynin, Danil

    2015-01-01

    The effect of the voltage rise time on nanosecond and sub-nanosecond impulse breakdown of distilled water is studied. The dependence of anode initiated streamer inception on this parameter is shown to be more intricate than previously reported, particularly as it relates to mechanisms directly in the liquid phase. Dynamics of the emission phase for sub-nanosecond pulses with 600ps rise time are presented to enable comparison with previous work on nanosecond initiation features. Schlieren imaging is also used to show the development of optical density perturbations and rarefactions as a result of electrostriction in the liquid which were previously found for nanosecond pulses as well. The mechanism of nanopore generation in the liquid due to fast impulses proposed by Shneider, Pekker and Fridman is used to explain the results.

  13. Stable a-Si:H-Based Multijunction Solar Cells with Guidance from Real-Time Optics: Final Report, 17 July 1998--16 November 2001

    SciTech Connect (OSTI)

    Wronski, C. R.; Collins, R. W.; Pearce, J. M.; Koval, R. J.; Ferlauto, A. S.; Ferreira, G. M.; Chen C.

    2002-08-01

    This report describes the new insights obtained into the growth of hydrogenated silicon (Si:H) films via real-time spectroscopic ellipsometry (RTSE) measurements. Evolutionary phase diagrams were expanded to include the effects of different deposition conditions, including rf power, pressure, and temperature. Detailed studies of degradation kinetics in thin films and corresponding solar cells have been carried out. Both p-i-n and n-i-p solar cells that incorporate Si:H i-layers deposited with and without H2-dilution have been studied. For the first time, direct and reliable correlations have been obtained between the light-induced changes in thin-film materials and the degradation of the corresponding solar cells.

  14. Energy Management Through Innovative Rates 

    E-Print Network [OSTI]

    Williams, M. L.

    1982-01-01

    of energy efficiency in the industrial sector and specific rate design alternatives for doing so....

  15. Analogue to information system based on PLL-based frequency synthesizers with fast locking schemes 

    E-Print Network [OSTI]

    Lin, Ming-Lang

    2010-01-01

    rate being limited in applications a novel irregular data conversion scheme called analogue-to-information system (AIS) is proposed in this thesis. The AIS is typically based upon LCSS, but an adjustable clock generator and a real time data compression...

  16. Time in Quantum Mechanics

    E-Print Network [OSTI]

    Curt A. Moyer

    2013-05-23

    The failure of conventional quantum theory to recognize time as an observable and to admit time operators is addressed. Instead of focusing on the existence of a time operator for a given Hamiltonian, we emphasize the role of the Hamiltonian as the generator of translations in time to construct time states. Taken together, these states constitute what we call a timeline, or quantum history, that is adequate for the representation of any physical state of the system. Such timelines appear to exist even for the semi-bounded and discrete Hamiltonian systems ruled out by Pauli's theorem. However, the step from a timeline to a valid time operator requires additional assumptions that are not always met. Still, this approach illuminates the crucial issue surrounding the construction of time operators, and establishes quantum histories as legitimate alternatives to the familiar coordinate and momentum bases of standard quantum theory.

  17. Charged-Particle Thermonuclear Reaction Rates: III. Nuclear Physics Input

    E-Print Network [OSTI]

    Christian Iliadis; Richard Longland; Art Champagne; Alain Coc

    2010-04-23

    The nuclear physics input used to compute the Monte Carlo reaction rates and probability density functions that are tabulated in the second paper of this series (Paper II) is presented. Specifically, we publish the input files to the Monte Carlo reaction rate code RatesMC, which is based on the formalism presented in the first paper of this series (Paper I). This data base contains overwhelmingly experimental nuclear physics information. The survey of literature for this review was concluded in November 2009.

  18. A PCI based high-fanout AER mapper with 2 GiB RAM look-up table, 0.8 s latency and 66 MHz output event-rate

    E-Print Network [OSTI]

    A PCI based high-fanout AER mapper with 2 GiB RAM look-up table, 0.8 µs latency and 66 MHz output and complexity in recent years, thanks also the adoption of the Address-Event Representation (AER) as a standard for transmitting signals among chips, and building multi-chip event-based systems. AER mapper devices that route

  19. Phase II of a Six sigma Initiative to Study DWPF SME Analytical Turnaround Times: SRNL's Evaluation of Carbonate-Based Dissolution Methods

    SciTech Connect (OSTI)

    Edwards, Thomas

    2005-09-01

    The Analytical Development Section (ADS) and the Statistical Consulting Section (SCS) of the Savannah River National Laboratory (SRNL) are participating in a Six Sigma initiative to improve the Defense Waste Processing Facility (DWPF) Laboratory. The Six Sigma initiative has focused on reducing the analytical turnaround time of samples from the Slurry Mix Evaporator (SME) by developing streamlined sampling and analytical methods [1]. The objective of Phase I was to evaluate the sub-sampling of a larger sample bottle and the performance of a cesium carbonate (Cs{sub 2}CO{sub 3}) digestion method. Successful implementation of the Cs{sub 2}CO{sub 3} fusion method in the DWPF would have important time savings and convenience benefits because this single digestion would replace the dual digestion scheme now used. A single digestion scheme would result in more efficient operations in both the DWPF shielded cells and the inductively coupled plasma--atomic emission spectroscopy (ICP-AES) laboratory. By taking a small aliquot of SME slurry from a large sample bottle and dissolving the vitrified SME sample with carbonate fusion methods, an analytical turnaround time reduction from 27 hours to 9 hours could be realized in the DWPF. This analytical scheme has the potential for not only dramatically reducing turnaround times, but also streamlining operations to minimize wear and tear on critical shielded cell components that are prone to fail, including the Hydragard{trademark} sampling valves and manipulators. Favorable results from the Phase I tests [2] led to the recommendation for a Phase II effort as outlined in the DWPF Technical Task Request (TTR) [3]. There were three major tasks outlined in the TTR, and SRNL issued a Task Technical and QA Plan [4] with a corresponding set of three major task activities: (1) Compare weight percent (wt%) total solids measurements of large volume samples versus peanut vial samples. (2) Evaluate Cs{sub 2}CO{sub 3} and K{sub 2}CO{sub 3} fusion methods using DWPF simulated glass (part 1) and (to the extent possible) using DWPF radioactive glass (part 2). (3) Recommend specific equipment to implement the new methods and work with SRNL's Equipment Engineering Section (EES) to ensure compatibility of the equipment with the DWPF shielded cells. The focus of this report is major task activity No.2 (parts 1 and 2). The other two major task activities are to be addressed separately. The measurements supporting task activity No.1 are being conducted at the DWPF. EES is currently designing and fabricating the DWPF cell equipment needed for the new method as part of major task activity No.3.

  20. Stable a-Si:H Based Multijunction Solar Cells with Guidance from Real Time Optics: Annual Report, Phase I: 17 July 1998-16 October 1999

    SciTech Connect (OSTI)

    Wronski, C.R.; Collins, R.W.; Jiao, L.; Ferlauto, A.; Rovira, P.I.; Koval, R.J.; Lu, Z.; Niu, X.

    2000-08-29

    This summary describes tasks of novel improved intrinsic materials for multijunction solar cells, insights into improved stability in materials and solar cells, optimization of solar cell performance with improved intrinsic layers, and optimization of multijunction solar cells. The report characterizes a protocrystalline a-Si:H film growth regime where thin samples retain their amorphous state when their growth time or thickness is limited to small values, even when films are deposited with high hydrogen dilution that results in microcrystalline thick films. The Staebler-Wronski degradation kinetics of films and devices are systematically studied as a function of hydrogen dilution.

  1. Kodama time

    E-Print Network [OSTI]

    Abreu, Gabriel

    2010-01-01

    In a general time-dependent (3+1)-dimensional spherically symmetric spacetime, the so-called Kodama vector is a naturally defined geometric quantity that is timelike outside the evolving horizon and so defines a preferred class of fiducial observers. However the Kodama vector does not by itself define any preferred notion of time. We demonstrate that a preferred time coordinate - which we shall call Kodama time - can be introduced by taking the additional step of applying the Clebsch decomposition theorem to the Kodama vector. We thus construct a geometrically preferred coordinate system for any time-dependent spherically symmetric spacetime, and explore its properties. In particular we use this formalism to construct a general class of conservation laws, generalizing Kodama's energy flux. We study the geometrically preferred fiducial observers, and demonstrate that it is possible to define and calculate a generalized notion of surface gravity that is valid throughout the entire evolving spacetime. Furthermor...

  2. A method for in situ absolute DD yield calibration of neutron time-of-flight detectors on OMEGA using CR-39-based proton detectors

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

    Waugh, C. J.; Rosenberg, M. J.; Zylstra, A. B.; Frenje, J. A.; Seguin, F. H.; Petrasso, R. D.; Glebov, V. Yu.; Sangster, T. C.; Stoeckl, C.

    2015-05-27

    Neutron time of flight (nTOF) detectors are used routinely to measure the absolute DD neutron yield at OMEGA. To check the DD yield calibration of these detectors, originally calibrated using indium activation systems, which in turn were cross-calibrated to NOVA nTOF detectors in the early 1990s, a direct in situ calibration method using CR-39 range filter proton detectors has been successfully developed. By measuring DD neutron and proton yields from a series of exploding pusher implosions at OMEGA, a yield calibration coefficient of 1.09 ± 0.02 (relative to the previous coefficient) was determined for the 3m nTOF detector. In addition,more »comparison of these and other shots indicates that significant reduction in charged particle flux anisotropies is achieved when bang time occurs significantly (on the order of 500 ps) after the trailing edge of the laser pulse. This is an important observation as the main source of the yield calibration error is due to particle anisotropies caused by field effects. The results indicate that the CR-39-nTOF in situ calibration method can serve as a valuable technique for calibrating and reducing the uncertainty in the DD absolute yield calibration of nTOF detector systems on OMEGA, the National Ignition Facility, and laser megajoule.« less

  3. A method for in situ absolute DD yield calibration of neutron time-of-flight detectors on OMEGA using CR-39-based proton detectors

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

    Waugh, C. J.; Rosenberg, M. J.; Zylstra, A. B.; Frenje, J. A.; Seguin, F. H.; Petrasso, R. D.; Glebov, V. Yu.; Sangster, T. C.; Stoeckl, C.

    2015-05-01

    Neutron time of flight (nTOF) detectors are used routinely to measure the absolute DD neutron yield at OMEGA. To check the DD yield calibration of these detectors, originally calibrated using indium activation systems, which in turn were cross-calibrated to NOVA nTOF detectors in the early 1990s, a direct in situ calibration method using CR-39 range filter proton detectors has been successfully developed. By measuring DD neutron and proton yields from a series of exploding pusher implosions at OMEGA, a yield calibration coefficient of 1.09 ± 0.02 (relative to the previous coefficient) was determined for the 3m nTOF detector. In addition,more »comparison of these and other shots indicates that significant reduction in charged particle flux anisotropies is achieved when bang time occurs significantly (on the order of 500 ps) after the trailing edge of the laser pulse. This is an important observation as the main source of the yield calibration error is due to particle anisotropies caused by field effects. The results indicate that the CR-39-nTOF in situ calibration method can serve as a valuable technique for calibrating and reducing the uncertainty in the DD absolute yield calibration of nTOF detector systems on OMEGA, the National Ignition Facility, and laser megajoule.« less

  4. A method for in situ absolute DD yield calibration of neutron time-of-flight detectors on OMEGA using CR-39-based proton detectors

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

    Waugh, C. J. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Rosenberg, M. J. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Zylstra, A. B. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Frenje, J. A. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Seguin, F. H. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Petrasso, R. D. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Glebov, V. Yu. [Lab. for Laser Energetics, Rochester, NY (United States); Sangster, T. C. [Lab. for Laser Energetics, Rochester, NY (United States); Stoeckl, C. [Lab. for Laser Energetics, Rochester, NY (United States)

    2015-05-01

    Neutron time of flight (nTOF) detectors are used routinely to measure the absolute DD neutron yield at OMEGA. To check the DD yield calibration of these detectors, originally calibrated using indium activation systems, which in turn were cross-calibrated to NOVA nTOF detectors in the early 1990s, a direct in situ calibration method using CR-39 range filter proton detectors has been successfully developed. By measuring DD neutron and proton yields from a series of exploding pusher implosions at OMEGA, a yield calibration coefficient of 1.09 ± 0.02 (relative to the previous coefficient) was determined for the 3m nTOF detector. In addition, comparison of these and other shots indicates that significant reduction in charged particle flux anisotropies is achieved when bang time occurs significantly (on the order of 500 ps) after the trailing edge of the laser pulse. This is an important observation as the main source of the yield calibration error is due to particle anisotropies caused by field effects. The results indicate that the CR-39-nTOF in situ calibration method can serve as a valuable technique for calibrating and reducing the uncertainty in the DD absolute yield calibration of nTOF detector systems on OMEGA, the National Ignition Facility, and laser megajoule.

  5. Calculating infinite-medium {alpha}-eigenvalue spectra with a transition rate matrix method

    SciTech Connect (OSTI)

    Betzler, B. R.; Kiedrowski, B. C.; Brown, F. B.; Martin, W. R.

    2013-07-01

    The time-dependent behavior of the energy spectrum in neutron transport was investigated with a formulation, based on continuous-time Markov processes, for computing {alpha}-eigenvalues and eigenvectors in an infinite medium. For this, a research Monte Carlo code called TORTE was created and used to estimate elements of a transition rate matrix. TORTE is capable of using both multigroup and continuous-energy nuclear data, and verification was performed. Eigenvalue spectra for infinite homogeneous mixtures were obtained and an eigenfunction expansion was used to investigate transient behavior of the neutron energy spectrum. (authors)

  6. ALICE TPC upgrade for High-Rate operations

    E-Print Network [OSTI]

    ,

    2015-01-01

    A new type of Time Projection Chamber (TPC) has been proposed for the upgrade of the ALICE (A Large Ion Collider Experiment at CERN) so as to cater to the high luminosity environment expected at the Large Hadron Collider (LHC) facility in future. This device will rely on the intrinsic ion back flow (IBF) suppression of Micro-Pattern Gas Detectors (MPGD) based technology in particular the Gas Electron Multiplier (GEM). GEM is to minimise the space charge effect in the main drift volume and thus will not require the standard gating grid and the resulting intrinsic dead time. It will thus be possible to read all minimum bias Pb--Pb events that the Large Hadron Collider (LHC) will deliver at the anticipated peak interaction rate of 50 kHz for the high luminosity heavy-ion era in Run 3. New read-out electronics will send the continuous data stream to a new online farm at rates up to 1~TByte/s. The new read-out chambers will consist of stacks of 4 GEM foils combining different hole pitches. In addition to a low ion...

  7. Diamond detector for high rate monitors of fast neutrons beams

    SciTech Connect (OSTI)

    Giacomelli, L.; Rebai, M.; Cippo, E. Perelli; Tardocchi, M.; Fazzi, A.; Andreani, C.; Pietropaolo, A.; Frost, C. D.; Rhodes, N.; Schooneveld, E.; Gorini, G.

    2012-06-19

    A fast neutron detection system suitable for high rate measurements is presented. The detector is based on a commercial high purity single crystal diamond (SDD) coupled to a fast digital data acquisition system. The detector was tested at the ISIS pulsed spallation neutron source. The SDD event signal was digitized at 1 GHz to reconstruct the deposited energy (pulse amplitude) and neutron arrival time; the event time of flight (ToF) was obtained relative to the recorded proton beam signal t{sub 0}. Fast acquisition is needed since the peak count rate is very high ({approx}800 kHz) due to the pulsed structure of the neutron beam. Measurements at ISIS indicate that three characteristics regions exist in the biparametric spectrum: i) background gamma events of low pulse amplitudes; ii) low pulse amplitude neutron events in the energy range E{sub dep}= 1.5-7 MeV ascribed to neutron elastic scattering on {sup 12}C; iii) large pulse amplitude neutron events with E{sub n} < 7 MeV ascribed to {sup 12}C(n,{alpha}){sup 9}Be and 12C(n,n')3{alpha}.

  8. ALICE TPC upgrade for High-Rate operations

    E-Print Network [OSTI]

    Saikat Biswas

    2015-11-08

    A new type of Time Projection Chamber (TPC) has been proposed for the upgrade of the ALICE (A Large Ion Collider Experiment at CERN) so as to cater to the high luminosity environment expected at the Large Hadron Collider (LHC) facility in future. This device will rely on the intrinsic ion back flow (IBF) suppression of Micro-Pattern Gas Detectors (MPGD) based technology in particular the Gas Electron Multiplier (GEM). GEM is to minimise the space charge effect in the main drift volume and thus will not require the standard gating grid and the resulting intrinsic dead time. It will thus be possible to read all minimum bias Pb--Pb events that the Large Hadron Collider (LHC) will deliver at the anticipated peak interaction rate of 50 kHz for the high luminosity heavy-ion era in Run 3. New read-out electronics will send the continuous data stream to a new online farm at rates up to 1~TByte/s. The new read-out chambers will consist of stacks of 4 GEM foils combining different hole pitches. In addition to a low ion back flow ($<$ 1\\%) other important requirements are good energy resolution (better than 12\\% (sigma) for $^{55}$Fe X-rays) and operational stability.

  9. Dynamic Line Rating Oncor Electric Delivery Smart Grid Program

    SciTech Connect (OSTI)

    Johnson, Justin; Smith, Cale; Young, Mike; Donohoo, Ken; Owen, Ross; Clark, Eddit; Espejo, Raul; Aivaliotis, Sandy; Stelmak, Ron; Mohr, Ron; Barba, Cristian; Gonzalez, Guillermo; Malkin, Stuart; Dimitrova, Vessela; Ragsdale, Gary; Mitchem, Sean; Jeirath, Nakul; Loomis, Joe; Trevino, Gerardo; Syracuse, Steve; Hurst, Neil; Mereness, Matt; Johnson, Chad; Bivens, Carrie

    2013-05-04

    Electric transmission lines are the lifeline of the electric utility industry, delivering its product from source to consumer. This critical infrastructure is often constrained such that there is inadequate capacity on existing transmission lines to efficiently deliver the power to meet demand in certain areas or to transport energy from high-generation areas to high-consumption regions. When this happens, the cost of the energy rises; more costly sources of power are used to meet the demand or the system operates less reliably. These economic impacts are known as congestion, and they can amount to substantial dollars for any time frame of reference: hour, day or year. There are several solutions to the transmission constraint problem, including: construction of new generation, construction of new transmission facilities, rebuilding and reconductoring of existing transmission assets, and Dynamic Line Rating (DLR). All of these options except DLR are capital intensive, have long lead times and often experience strong public and regulatory opposition. The Smart Grid Demonstration Program (SGDP) project co-funded by the Department of Energy (DOE) and Oncor Electric Delivery Company developed and deployed the most extensive and advanced DLR installation to demonstrate that DLR technology is capable of resolving many transmission capacity constraint problems with a system that is reliable, safe and very cost competitive. The SGDP DLR deployment is the first application of DLR technology to feed transmission line real-time dynamic ratings directly into the system operation’s State Estimator and load dispatch program, which optimizes the matching of generation with load demand on a security, reliability and economic basis. The integrated Dynamic Line Rating (iDLR)1 collects transmission line parameters at remote locations on the lines, calculates the real-time line rating based on the equivalent conductor temperature, ambient temperature and influence of wind and solar radiation on the stringing section, transmits the data to the Transmission Energy Management System, validates its integrity and passes it on to Oncor and ERCOT (Electric Reliability Council of Texas) respective system operations. The iDLR system is automatic and transparent to ERCOT System Operations, i.e., it operates in parallel with all other system status telemetry collected through Supervisory Control and Data Acquisition (SCADA) employed across the company.

  10. Multifunctional Nanowire/film Composites based Bi-modular Sensors for In-situ and Real-time High Temperature Gas Detection

    SciTech Connect (OSTI)

    Gao, Pu-Xian; Lei, Yu

    2013-06-01

    This final report to the Department of Energy/National Energy Technology Laboratory for DE-FE0000870 covers the period from 2009 to June, 2013 and summarizes the main research accomplishments, which can be divided in sensing materials innovation, bimodular sensor demonstration, and new understanding and discoveries. As a matter of fact, we have successfully completed all the project tasks in June 1, 2013, and presented the final project review presentation on the 9th of July, 2013. Specifically, the major accomplishments achieved in this project include: 1) Successful development of a new class of high temperature stable gas sensor nanomaterials based on composite nano-array strategy in a 3D or 2D fashion using metal oxides and perovskite nanostructures. 2) Successful demonstration of bimodular nanosensors using 2D nanofibrous film and 3D composite nanowire arrays using electrical resistance mode and electrochemical electromotive force mode. 3) Series of new discoveries and understandings based on the new composite nanostructure platform toward enhancing nanosensor performance in terms of stability, selectivity, sensitivity and mass flux sensing. In this report, we highlight some results toward these accomplishments.

  11. Photon-counting Brillouin optical time-domain reflectometry based on up-conversion detector and fiber Fabry-Perot scanning interferometer

    E-Print Network [OSTI]

    Haiyun Xia; Mingjia Shangguan; Guoliang Shentu; Chong Wang; Jiawei Qiu; Xiuxiu Xia; Chao Chen; Mingyang Zheng; Xiuping Xie; Qiang Zhang; Xiankang Dou; Jianwei Pan

    2015-04-06

    A direct-detection Brillouin optical time-domain reflectometry (BOTDR) is proposed and demonstrated by using an up-conversion single-photon detector and a fiber Fabry-Perot scanning interferometer (FFP-SI). Taking advantage of high signal-to-noise ratio of the detector and high spectrum resolution of the FFP-SI, the Brillouin spectrum along a polarization maintaining fiber (PMF) is recorded on a multiscaler with a small data size directly. In contrast with conventional BOTDR adopting coherent detection, photon-counting BOTDR is simpler in structure and easier in data processing. In the demonstration experiment, characteristic parameters of the Brillouin spectrum including its power, spectral width and frequency center are analyzed simultaneously along a 10 km PMF at different temperature and stain conditions.

  12. Chow Time 

    E-Print Network [OSTI]

    Unknown

    2011-09-05

    -1 THE PREDICTION OF BUS ARRIVAL TIME USING AUTOMATIC VEHICLE LOCATION SYSTEMS DATA A Dissertation by RAN HEE JEONG Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of DOCTOR OF PHILOSOPHY December 2004 Major Subject: Civil Engineering THE PREDICTION OF BUS ARRIVAL TIME USING AUTOMATIC VEHICLE LOCATION SYSTEMS DATA A Dissertation by RAN HEE JEONG Submitted to Texas A...

  13. Energy Efficient Building Environment Control Strategies Using Real-time Occupancy Measurements

    E-Print Network [OSTI]

    Cerpa, Alberto E.

    Energy Efficient Building Environment Control Strategies Using Real-time Occupancy Measurements (HVAC) systems ac- count for 50% of the total energy budget in buildings [5]. Prior research has shown 10 to 15% of HVAC energy can be reduced in buildings that set ventilation rates based on maximum

  14. Bubble growth rates in boiling

    E-Print Network [OSTI]

    Griffith, P.

    1956-01-01

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

  15. INVESTIGATION OF A DYNAMIC POWER LINE RATING CONCEPT FOR IMPROVED WIND ENERGY INTEGRATION OVER COMPLEX TERRAIN

    SciTech Connect (OSTI)

    Jake P. Gentle; Kurt S Myers; Tyler B Phillips; Inanc Senocak; Phil Anderson

    2014-08-01

    Dynamic Line Rating (DLR) is a smart grid technology that allows the rating of power line to be based on real-time conductor temperature dependent on local weather conditions. In current practice overhead power lines are generally given a conservative rating based on worst case weather conditions. Using historical weather data collected over a test bed area, we demonstrate there is often additional transmission capacity not being utilized with the current static rating practice. We investigate a new dynamic line rating methodology using computational fluid dynamics (CFD) to determine wind conditions along transmission lines at dense intervals. Simulated results are used to determine conductor temperature by calculating the transient thermal response of the conductor under variable environmental conditions. In calculating the conductor temperature, we use both a calculation with steady-state assumption and a transient calculation. Under low wind conditions, steady-state assumption predicts higher conductor temperatures that could lead to curtailments, whereas transient calculations produce conductor temperatures that are significantly lower, implying the availability of additional transmission capacity.

  16. An analytical and computational study of combined rate and size effects on material properties.

    SciTech Connect (OSTI)

    Fang, Huei Eliot; Chen, Zhen; Shen, Luming University of Missouri-Columbia, Columbia, MO); Gan, Yong

    2005-05-01

    The recent interests in developing multiscale model-based simulation procedures have brought about the challenging tasks of bridging different spatial and temporal scales within a unified framework. However, the research focus has been on the scale effect in the spatial domain with the loading rate being assumed to be quasi-static. Although material properties are rate-dependent in nature, little has been done in understanding combined loading rate and specimen size effects on the material properties at different scales. In addition, the length and time scales that can be probed by the molecular level simulations are still fairly limited due to the limitation of computational capability. Based on the experimental and computational capabilities available, therefore, an attempt is made in this report to formulate a hyper-surface in both spatial and temporal domains to predict combined size and rate effects on the mechanical properties of engineering materials. To demonstrate the features of the proposed hyper-surface, tungsten specimens of various sizes under various loading rates are considered with a focus on the uniaxial loading path. The mechanical responses of tungsten specimens under other loading paths are also explored to better understand the size effect. It appears from the preliminary results that the proposed procedure might provide an effective means to bridge different spatial and temporal scales in a unified multiscale modeling framework, and facilitate the application of nanoscale research results to engineering practice.

  17. Commercial Building Asset Rating Program

    Broader source: Energy.gov [DOE]

    Slides from a Commercial Building Initiative webinar outlining the Commercial Building Asset Rating Program on August 23, 2011.

  18. Methane oxidation rates by AMS

    E-Print Network [OSTI]

    Pack, M; Heintz, M; ReeburGh, WS; Trumbore, SE; Valentine, DL; Xu, X

    2009-01-01

    second case. Number of cases Methane oxidation rates by AMSIn the marine environment methane (CH 4 ) oxidation consumes

  19. FUTURE POWER GRID INITIATIVE Real-time High-Performance

    E-Print Network [OSTI]

    #12;» System will support time-critical power grid applications (PMU data rate: every 30ms) » Flexible

  20. Wholesale Power Rate Schedules | Department of Energy

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

    Rate Schedules Wholesale Power Rate Schedules Wholesale Power Rate Schedules October 1, 2012 ALA-1-N Wholesale Power Rate Schedule Area: PowerSouth Energy Cooperative System:...

  1. Real-Time Pricing- A Flexible Alternative for Electrical Power Supply 

    E-Print Network [OSTI]

    Reynolds, S. D.; Frye, A. O. Jr.

    1991-01-01

    place greater emphasis on developing programs that benefit the customer while at the same time benefiting the utility. Economy Surplus Power (ESP) is such a program. ESP offers industrial customers attractively priced power supply arrangements based... at a rate far below what had been forecasted a decade earlier. Sales to large industrial customers were depressed. At the same time TVA faced a temporary surplus of generating capacity. Viewed independently, each <1f these problems has the makings...

  2. Rate allocation in a remote control structure 

    E-Print Network [OSTI]

    Meadow, Charles Joe

    1984-01-01

    are linearly dependent upon the measurement estimates. Therefore, they can be considered as stationary and gaussian. To optimally encode a signal an arbitrary time delay is required which will produce a non-causal control solution. This is a non.... Jones (Head of Department) May 1984 ABSTRACT Rate Allocation in a Remote Control Structure (May 1984) Charles Joe Meadow, Jr. , B. S. , Texas A&M University Chairman of Advisory Committee: Dr. Thomas R. Fischer A Linear-Quadratic-Gaussian (LQG...

  3. Facilities and Administration (Indirect) Costs Rates Facilities and Administrative (indirect) costs rates are the result of negotiations with the U.S.

    E-Print Network [OSTI]

    Saldin, Dilano

    Facilities and Administration (Indirect) Costs Rates Facilities and Administrative (indirect) costs (Indirect Costs) Source of Funds Applicable To F&A Rate DHHS Federally Negotiated Rates: Federal, Non or a different rate has been approved by the Director of OSP. *MTDC Base: Modified total direct costs consist

  4. ASIC for High Rate 3D Position Sensitive Detectors

    SciTech Connect (OSTI)

    Vernon, E.; De Geronimo, G.; Ackley, K.; Fried, J.; He, Z.; Herman, C.; Zhang, F.

    2010-06-16

    We report on the development of an application specific integrated circuit (ASIC) for 3D position sensitive detectors (3D PSD). The ASIC is designed to operate with pixelated wide bandgap sensors like Cadmium-Zinc-Telluride (CZT), Mercuric Iodide (Hgl2) and Thallium Bromide (TIBr). It measures the amplitudes and timings associated with an ionizing event on 128 anodes, the anode grid, and the cathode. Each channel provides low-noise charge amplification, high-order shaping with peaking time adjustable from 250 ns to 12 {micro}s, gain adjustable to 20 mV/fC or 120 mV/fC (for a dynamic range of 3.2 MeV and 530 keV in CZT), amplitude discrimination with 5-bit trimming, and positive and negative peak and timing detections. The readout can be full or sparse, based on a flag and single- or multi-cycle token passing. All channels, triggered channels only, or triggered with neighbors can be read out thus increasing the rate capability of the system to more than 10 kcps. The ASIC dissipates 330 mW which corresponds to about 2.5 mW per channel.

  5. Time translation of quantum properties

    E-Print Network [OSTI]

    L. Vanni; R. Laura

    2008-12-03

    Based on the notion of time translation, we develop a formalism to deal with the logic of quantum properties at different times. In our formalism it is possible to enlarge the usual notion of context to include composed properties involving properties at different times. We compare our results with the theory of consistent histories.

  6. Time encoded radiation imaging

    DOE Patents [OSTI]

    Marleau, Peter; Brubaker, Erik; Kiff, Scott

    2014-10-21

    The various technologies presented herein relate to detecting nuclear material at a large stand-off distance. An imaging system is presented which can detect nuclear material by utilizing time encoded imaging relating to maximum and minimum radiation particle counts rates. The imaging system is integrated with a data acquisition system that can utilize variations in photon pulse shape to discriminate between neutron and gamma-ray interactions. Modulation in the detected neutron count rates as a function of the angular orientation of the detector due to attenuation of neighboring detectors is utilized to reconstruct the neutron source distribution over 360 degrees around the imaging system. Neutrons (e.g., fast neutrons) and/or gamma-rays are incident upon scintillation material in the imager, the photons generated by the scintillation material are converted to electrical energy from which the respective neutrons/gamma rays can be determined and, accordingly, a direction to, and the location of, a radiation source identified.

  7. Relative and Absolute Mobility Rates in the United States

    E-Print Network [OSTI]

    Miller, L. Keith

    1971-01-01

    the actual normative structure allows little else than inheritance. Thus whether one is comparing the same country at different times or different countries at the same time, the absolute mobility rates may not reveal the actual normative structures. Relative... of jobs which will obtain if present trends in the distribution continue until a stable state is reached. This stable state is easily determined by means of simple Markov theorems. 3 Relative and Absolute Mobility Rates Table 2. The Rigidity of U...

  8. Risk, Unemployment, and the Stock Market: A Rare-Event-Based Explanation of Labor Market

    E-Print Network [OSTI]

    Kahana, Michael J.

    Risk, Unemployment, and the Stock Market: A Rare-Event-Based Explanation of Labor Market Volatility proposes an explanation of labor market volatility based on time-varying risk, modeled as a small, implying both greater risk in productivity and lower expected growth rates. Thus even if labor productivity

  9. LMS SUBSCRIPTION RATES & NOTES 2014/15 SUBSCRIPTION RATES

    E-Print Network [OSTI]

    1 LMS SUBSCRIPTION RATES & NOTES 2014/15 SUBSCRIPTION RATES LMS membership subscription: £ US.00 Associate membership 16.00 32.00 Free membership (see note 2) Print only Online only Print & online* LMS, or are unemployed or otherwise in hardship. Contact membership@lms.ac.uk to enquire further. #12;LMS PUBLICATIONS 4

  10. LMS SUBSCRIPTION RATES & NOTES 2013/14 SUBSCRIPTION RATES

    E-Print Network [OSTI]

    1 LMS SUBSCRIPTION RATES & NOTES 2013/14 SUBSCRIPTION RATES LMS membership subscription: £ US.00 Associate membership 15.00 30.00 Free membership (see note 2) Print only Online only Print & online* LMS, or are unemployed or otherwise in hardship. Contact membership@lms.ac.uk to enquire further. #12;LMS PUBLICATIONS 4

  11. Upper Great Plains Rates information

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

    3, 2014 (112 KB .pdf) FRN Notice of Proposed Transmission and Ancillary Services Formula Rates November 3, 2014 (93 KB .pdf) SPP Membership Information Integrated System (IS)...

  12. Sustainable Building Rating Systems Summary

    SciTech Connect (OSTI)

    Fowler, Kimberly M.; Rauch, Emily M.

    2006-07-01

    The purpose of this document is to offer information that could be used to compare and contrast sustainable building rating systems.

  13. Assessment of the point-source method for estimating dose rates to members of the public from exposure to patients with 131I thyroid treatment

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

    Dewji, Shaheen Azim; Bellamy, Michael B.; Hertel, Nolan E.; Leggett, Richard Wayne; Sherbini, Sami; Saba, Mohammad S.; Eckerman, Keith F.

    2015-09-01

    The U.S. Nuclear Regulatory Commission (USNRC) initiated a contract with Oak Ridge National Laboratory (ORNL) to calculate radiation dose rates to members of the public that may result from exposure to patients recently administered iodine-131 (131I) as part of medical therapy. The main purpose was to compare dose rate estimates based on a point source and target with values derived from more realistic simulations that considered the time-dependent distribution of 131I in the patient and attenuation of emitted photons by the patient’s tissues. The external dose rate estimates were derived using Monte Carlo methods and two representations of the Phantommore »with Movable Arms and Legs, previously developed by ORNL and the USNRC, to model the patient and a nearby member of the public. Dose rates to tissues and effective dose rates were calculated for distances ranging from 10 to 300 cm between the phantoms and compared to estimates based on the point-source method, as well as to results of previous studies that estimated exposure from 131I patients. The point-source method overestimates dose rates to members of the public in very close proximity to an 131I patient but is a broadly accurate method of dose rate estimation at separation distances of 300 cm or more at times closer to administration.« less

  14. High-Rate Capable Floating Strip Micromegas

    E-Print Network [OSTI]

    Jonathan Bortfeldt; Michael Bender; Otmar Biebel; Helge Danger; Bernhard Flierl; Ralf Hertenberger; Philipp Lösel; Samuel Moll; Katia Parodi; Ilaria Rinaldi; Alexander Ruschke; André Zibell

    2015-08-04

    We report on the optimization of discharge insensitive floating strip Micromegas (MICRO-MEsh GASeous) detectors, fit for use in high-energy muon spectrometers. The suitability of these detectors for particle tracking is shown in high-background environments and at very high particle fluxes up to 60MHz/cm$^2$. Measurement and simulation of the microscopic discharge behavior have demonstrated the excellent discharge tolerance. A floating strip Micromegas with an active area of 48cm$\\times$50cm with 1920 copper anode strips exhibits in 120GeV pion beams a spatial resolution of 50$\\mu$m at detection efficiencies above 95%. Pulse height, spatial resolution and detection efficiency are homogeneous over the detector. Reconstruction of particle track inclination in a single detector plane is discussed, optimum angular resolutions below $5^\\circ$ are observed. Systematic deviations of this $\\mu$TPC-method are fully understood. The reconstruction capabilities for minimum ionizing muons are investigated in a 6.4cm$\\times$6.4cm floating strip Micromegas under intense background irradiation of the whole active area with 20MeV protons at a rate of 550kHz. The spatial resolution for muons is not distorted by space charge effects. A 6.4cm$\\times$6.4cm floating strip Micromegas doublet with low material budget is investigated in highly ionizing proton and carbon ion beams at particle rates between 2MHz and 2GHz. Stable operation up to the highest rates is observed, spatial resolution, detection efficiencies, the multi-hit and high-rate capability are discussed.

  15. Modeling of optical amplifier waveguide based on silicon nanostructures and rare earth ions doped silica matrix gain media by a finite-difference time-domain method: comparison of achievable gain with Er3+ or Nd3+ ions dopants

    E-Print Network [OSTI]

    Cardin, Julien; Dufour, Christian; Gourbilleau, Fabrice

    2015-01-01

    A comparative study of the gain achievement is performed in a waveguide optical amplifier whose active layer is constituted by a silica matrix containing silicon nanograins acting as sensitizer of either neodymium ions (Nd 3+) or erbium ions (Er 3+). Due to the large difference between population levels characteristic times (ms) and finite-difference time step (10 --17 s), the conventional auxiliary differential equation and finite-difference time-domain (ADE-FDTD) method is not appropriate to treat such systems. Consequently, a new two loops algorithm based on ADE-FDTD method is presented in order to model this waveguide optical amplifier. We investigate the steady states regime of both rare earth ions and silicon nanograins levels populations as well as the electromagnetic field for different pumping powers ranging from 1 to 10 4 mW.mm-2. Furthermore, the three dimensional distribution of achievable gain per unit length has been estimated in this pumping range. The Nd 3+ doped waveguide shows a higher gross...

  16. Temperature-dependence of biomass accumulation rates during secondary succession

    E-Print Network [OSTI]

    Gillooly, Jamie

    on the biochemical kinetics of photosynthesis in chloroplasts. In addition, the rate of biomass accumulation one example of how emergent, ecosystem-level rate processes can be predicted based on the kinetics of uncertainty in terrestrial ecosystem models (e.g. Schimel et al. 2001; Houghton 2003, 2005). Additionally

  17. Efficient Cost Measures for Motion Compensation at Low Bit Rates

    E-Print Network [OSTI]

    Hoang, Dzung T.; Long, Philip M.; Vitter, Jeffrey Scott

    1996-01-01

    We present and compare methods for choosing motion vectors for block-based motion-compensated video coding. The primary focus is on videophone and video- conferencing applications, where low bit rates are neces- sary, where motion is usually limited...

  18. TCP Rate Control 1 Shrikrishna Karandikar, Shivkumar Kalyanaraman, Prasad Bagal 2 , Bob Packer 3

    E-Print Network [OSTI]

    Kalyanaraman, Shivkumar

    presents TCP Rate Control, a new technique for transparently augmenting end­to­end TCP perfor­ mance size, the round trip time and the rate of acknowledgments. TCP rate control affects these aspects proportional to the round trip time, the timeout delays and the square root of loss probability [17] (ignoring

  19. TCP Rate Control 1 Shrikrishna Karandikar, Shivkumar Kalyanaraman, Prasad Bagal 2 , Bob Packer 3

    E-Print Network [OSTI]

    Kalyanaraman, Shivkumar

    presents TCP Rate Control, a new technique for transparently augmenting end­to­end TCP perfor­ mance, the round trip time and the rate of acknowledgments (or acks). TCP rate control controls these aspects to the round trip time, the timeout delays and the square root of loss probability [17] (ignoring effects

  20. Measured dose rate constant from oncology patients administered 18F for positron emission tomography

    SciTech Connect (OSTI)

    Quinn, Brian; Holahan, Brian; Aime, Jean; Humm, John; St Germain, Jean; Dauer, Lawrence T.

    2012-10-15

    Purpose: Patient exposure rate measurements verify published patient dose rate data and characterize dose rates near 2-18-fluorodeoxyglucose ({sup 18}F-FDG) patients. A specific dose rate constant based on patient exposure rate measurements is a convenient quantity that can be applied to the desired distance, injection activity, and time postinjection to obtain an accurate calculation of cumulative external radiation dose. This study reports exposure rates measured at various locations near positron emission tomography (PET) {sup 18}F-FDG patients prior to PET scanning. These measurements are normalized for the amount of administered activity, measurement distance, and time postinjection and are compared with other published data. Methods: Exposure rates were measured using a calibrated ionization chamber at various body locations from 152 adult oncology patients postvoid after a mean uptake time of 76 min following injection with a mean activity of 490 MBq {sup 18}F-FDG. Data were obtained at nine measurement locations for each patient: three near the head, four near the chest, and two near the feet. Results: On contact with, 30 cm superior to and 30 cm lateral to the head, the mean (75th percentile) dose rates per unit injected activity at 60 min postinjection were 0.482 (0.511), 0.135 (0.155), and 0.193 (0.223) {mu}Sv/MBq h, respectively. On contact with, 30 cm anterior to, 30 cm lateral to and 1 m anterior to the chest, the mean (75th percentile) dose rates per unit injected activity at 60 min postinjection were 0.623 (0.709), 0.254 (0.283), 0.190 (0.218), and 0.067 (0.081) {mu}Sv/MBq h respectively. 30 cm inferior and 30 cm lateral to the feet, the mean (75th percentile) dose rates per unit injected activity at 60 min postinjection were 0.024 (0.022) and 0.039 (0.044) {mu}Sv/MBq h, respectively. Conclusions: The measurements for this study support the use of 0.092 {mu}Sv m{sup 2}/MBq h as a reasonable representation of the dose rate anterior from the chest of patients immediately following injection. This value can then be reliably scaled to the desired time and distance for planning and staff dose evaluation purposes. At distances closer than 1 m, a distance-specific dose rate constant of 0.367 {mu}Sv/MBq h at 30 cm is recommended for accurate calculations. An accurate patient-specific dose rate constant that accounts for patient-specific variables (e.g., distribution and attenuation) will allow an accurate evaluation of the dose rate from a patient injected with an isotope rather than simply utilizing a physical constant.

  1. Time irreversible copula-based Markov Models

    E-Print Network [OSTI]

    Beare, Brendan K.; Seo, Juwon

    2012-01-01

    1008. Fentaw, A. and Naik-Nimbalkar, U. V. (2008). Dynamicinclude Fentaw and Naik- Nimbalkar (2008), Gagliardini and

  2. Evaluation of Instrumentation and Dynamic Thermal Ratings for Overhead Lines

    SciTech Connect (OSTI)

    Phillips, A.

    2013-01-31

    In 2010, a project was initiated through a partnership between the Department of Energy (DOE) and the New York Power Authority (NYPA) to evaluate EPRI?s rating technology and instrumentation that can be used to monitor the thermal states of transmission lines and provide the required real-time data for real-time rating calculations. The project included the installation and maintenance of various instruments at three 230 kV line sites in northern New York. The instruments were monitored, and data collection and rating calculations were performed for about a three year period.

  3. 2007 Wholesale Power Rate Case Initial Proposal : Wholesale Power Rate Development Study.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    2007-11-01

    The Wholesale Power Rate Development Study (WPRDS) calculates BPA proposed rates based on information either developed in the WPRDS or supplied by the other studies that comprise the BPA rate proposal. All of these studies, and accompanying documentation, provide the details of computations and assumptions. In general, information about loads and resources is provided by the Load Resource Study (LRS), WP-07-E-BPA-01, and the LRS Documentation, WP-07-E-BPA-01A. Revenue requirements information, as well as the Planned Net Revenues for Risk (PNNR), is provided in the Revenue Requirement Study, WP-07-E-BPA-02, and its accompanying Revenue Requirement Study Documentation, WP-07-E-BPA-02A and WP-07-E-BPA-02B. The Market Price Forecast Study (MPFS), WP-07-E-BPA-03, and the MPFS Documentation, WP-07-E-BPA-03A, provide the WPRDS with information regarding seasonal and diurnal differentiation of energy rates, as well information regarding monthly market prices for Demand Rates. In addition, this study provides information for the pricing of unbundled power products. The Risk Analysis Study, WP-07-E-BPA-04, and the Risk Analysis Study Documentation, WP-07-E-BPA-04A, provide short-term balancing purchases as well as secondary energy sales and revenue. The Section 7(b)(2) Rate Test Study, WP-07-E-BPA-06, and the Section 7(b)(2) Rate Test Study Documentation, WP-07-E-BPA-06A, implement Section 7(b)(2) of the Northwest Power Act to ensure that BPA preference customers firm power rates applied to their general requirements are no higher than rates calculated using specific assumptions in the Northwest Power Act.

  4. Innovative Rates Program. Final report

    SciTech Connect (OSTI)

    Not Available

    1982-06-21

    Title II of the Energy Conservation and Production Act (ECPA) as amended by the Public Utility Regulatory Policies Act (PURPA) provided financial assistance to state utility regulatory commissions, nonregulated electric utilities, and the Tennessee Valley Authority through the Innovative Rates Program. The financial assistance was to be used to plan or carry out electric utility regulatory rate reform initiatives relating to innovative rate structures that encourage conservation of energy, electric utility efficiency and reduced costs, and equitable rates to consumers. The Federal and local objectives of the project are described. Activities planned and accomplishments are summarized for the following: project management, data collection, utility bill evaluation, billing enclosure/mailing evaluation, media program evaluation, display evaluation, rate study sessions evaluation, speakers bureau evaluation, and individual customer contacts. A timetable/milestone chart and financial information are included. (MHR)

  5. Understanding the role of multi-rate retry mechanism for effective rate control in 802.11 wireless LANs 

    E-Print Network [OSTI]

    Marina, Mahesh; Koci, Neda

    We consider the multi-rate retry (MRR) capability provided by current 802.11 implementations and carry out simulation-based study of its impact on performance with state-of- the-art rate control mechanisms in typical indoor wireless LAN scenarios...

  6. The growth rate of gas hydrate from refrigerant R12

    SciTech Connect (OSTI)

    Kendoush, Abdullah Abbas; Jassim, Najim Abid [Centre of Engineering Physics, Ministry of Sciences and Technology, P.O. Box 765, Baghdad (Iraq); Joudi, Khalid A. [Al-Nahrain University, Baghdad (Iraq)

    2006-07-15

    Experimental and theoretical investigations were presented dealing with three phase direct-contact heat transfer by evaporation of refrigerant drops in an immiscible liquid. Refrigerant R12 was used as the dispersed phase, while water and brine were the immiscible continuous phase. A numerical solution is presented to predict the formation rate of gas hydrates in test column. The solution provided an acceptable agreement when compared with experimental results. The gas hydrate growth rate increased with time. It increased with increasing dispersed phase flow rate. The presence of surface-active sodium chloride in water had a strong inhibiting effect on the gas hydrate formation rate. (author)

  7. Rate-decline Relations for Unconventional Reservoirs and Development of Parametric Correlations for Estimation of Reservoir Properties 

    E-Print Network [OSTI]

    Askabe, Yohanes 1985-

    2012-10-24

    Time-rate analysis and time-rate-pressure analysis methods are available to estimate reserves and study flow performance of wells in unconventional gas reservoirs. However, these tools are often incorrectly used or the analysis can become difficult...

  8. Resuspension rates from aged inert-tracer sources

    SciTech Connect (OSTI)

    Sehmel, G.A.

    1982-11-01

    Wind-caused particle resuspension rates were investigated with molybdenum tracers at two circular resuspension sites in the Hanford area. The tracer particles were calcium molybdate. The radii of each circular tracer-source area were 22.9 m and 29.9 m respectively for tracer deposited on 2 October 1973 and 29 May 1979. Resuspension rates were investigated by sampling resuspended tracer with air sampling equipment mounted as a function of height on a centrally located sampling tower at each site. Sampling equipment was operated as a function of wind speed increments in order to investigate resuspension rates, wind speed dependencies of resuspension rates, and for subsequent comparisons of resuspension rate changes as a function of time for constant wind speed ranges. Experimental results are reported for measurements over several years. Resuspension rates ranged from about 10/sup -13/ to 10/sup -6/ fraction of the tracer source resuspended per second. Resuspension rates tended to increase with increasing wind speed. At one investigation site, resuspension rates were nearly constant, except for seasonal variations, for a four-year time period. Resuspension rates appear higher in the autumn than in the spring and summer.

  9. EDC-37 Deflagration Rates at Elevated Pressures

    SciTech Connect (OSTI)

    Maienschein, J L; Koerner, J G

    2008-01-31

    We report deflagration rates on EDC-37 at high pressures. Experiments are conducted using the Lawrence Livermore National Laboratory High Pressure Strand Burner (HPSB) apparatus. The HPSB contains a deflagrating sample in a small volume, high pressure chamber. The sample consists of nine, 6.35 mm diameter, 6.35 mm length cylinders stacked on end, with burn wires placed between cylinders. Sample deflagration is limited to the cross-sectional surface of the cylinder by coating the cylindrical surface of the tower with Halthane 88-2 epoxy. Sample deflagration is initiated on one end of the tower by a B/KNO{sub 3} and HNS igniter train. Simultaneous temporal pressure history and burn front time of arrival measurements yield the laminar deflagration rate for a range of pressures and provide insight into deflagration uniformity. These measurements are one indicator of overall thermal explosion violence. Specific details of the experiment and the apparatus can be found in the literature.

  10. PageRate: Counting Web Users' Votes Jianhan Zhu, Jun Hong, John G. Hughes

    E-Print Network [OSTI]

    Zhu, Jianhan

    PageRate: Counting Web Users' Votes Jianhan Zhu, Jun Hong, John G. Hughes School of Information.hughes}@ulst.ac.uk ABSTRACT We propose a PageRate method to give Web pages on a Web site ratings based on the Web linkClustering algorithm is proposed to cluster Web pages with similar incoming links and ratings. The results are used

  11. A grid of MHD models for stellar mass loss and spin-down rates of solar analogs

    SciTech Connect (OSTI)

    Cohen, O.; Drake, J. J.

    2014-03-01

    Stellar winds are believed to be the dominant factor in the spin-down of stars over time. However, stellar winds of solar analogs are poorly constrained due to observational challenges. In this paper, we present a grid of magnetohydrodynamic models to study and quantify the values of stellar mass loss and angular momentum loss rates as a function of the stellar rotation period, magnetic dipole component, and coronal base density. We derive simple scaling laws for the loss rates as a function of these parameters, and constrain the possible mass loss rate of stars with thermally driven winds. Despite the success of our scaling law in matching the results of the model, we find a deviation between the 'solar dipole' case and a real case based on solar observations that overestimates the actual solar mass loss rate by a factor of three. This implies that the model for stellar fields might require a further investigation with additional complexity. Mass loss rates in general are largely controlled by the magnetic field strength, with the wind density varying in proportion to the confining magnetic pressure B {sup 2}. We also find that the mass loss rates obtained using our grid models drop much faster with the increase in rotation period than scaling laws derived using observed stellar activity. For main-sequence solar-like stars, our scaling law for angular momentum loss versus poloidal magnetic field strength retrieves the well-known Skumanich decline of angular velocity with time, ?{sub *}?t {sup –1/2}, if the large-scale poloidal magnetic field scales with rotation rate as B{sub p}??{sub ?}{sup 2}.

  12. Dispatch R427 Time perception: Brain time or event time?

    E-Print Network [OSTI]

    Johnston, Alan

    Dispatch R427 Time perception: Brain time or event time? Alan Johnston* and Shin'ya Nishida Recent experiments show that synchronous events can appear to an observer to occur at different times. Neural processing time delays are offered as an explanation of these temporal illusions, but equating perceived time

  13. Rate Adjustments and Public Involvement

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

    Letter to South Texas Electric Coop., Inc requesting an extension of the existing rate formula FalconAmistad WAPA-143 FERC Approval FalconAmistad Published WAPA-143 Falcon...

  14. Tier 2 Vintage Rate Workshop

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

    period FY2015 through 2028. Customers have a diversification right to limit the amount of power they purchase at the Load Growth rate in future years with notice provided by...

  15. Asset Prices and Exchange Rates

    E-Print Network [OSTI]

    Pavlova, Anna

    2003-08-01

    This paper develops a simple two-country, two-good model, in which the real exchange rate, stock and bond prices are jointly determined. The model predicts that ...

  16. Asset Prices and Exchange Rates

    E-Print Network [OSTI]

    Pavlova, Anna

    2004-11-30

    This paper develops a simple two-country, two-good model, in which the real exchange rate, stock and bond prices are jointly determined. The model predicts that stock market prices are correlated ...

  17. High compression rate text summarization

    E-Print Network [OSTI]

    Branavan, Satchuthananthavale Rasiah Kuhan

    2008-01-01

    This thesis focuses on methods for condensing large documents into highly concise summaries, achieving compression rates on par with human writers. While the need for such summaries in the current age of information overload ...

  18. Analysis of electron capture process in charge pumping sequence using time domain measurements

    SciTech Connect (OSTI)

    Hori, Masahiro Watanabe, Tokinobu; Ono, Yukinori; Tsuchiya, Toshiaki

    2014-12-29

    A method for analyzing the electron capture process in the charge pumping (CP) sequence is proposed and demonstrated. The method monitors the electron current in the CP sequence in time domain. This time-domain measurements enable us to directly access the process of the electron capture to the interface defects, which are obscured in the conventional CP method. Using the time-domain measurements, the rise time dependence of the capture process is systematically investigated. We formulate the capture process based on the rate equation and derive an analytic form of the current due to the electron capture to the defects. Based on the formula, the experimental data are analyzed and the capture cross section is obtained. In addition, the time-domain data unveil that the electron capture process completes before the electron channel opens, or below the threshold voltage in a low frequency range of the pulse.

  19. Time Management Managing Time and Tasks

    E-Print Network [OSTI]

    Kunkle, Tom

    Time Management Managing Time and Tasks What is time management? Time can't be managed ­ but you can manage the amount of time you use each day for fun, work, rest, and time spent with others. Why is time management important? You have responsibilities to yourself, to your family and friends, to your

  20. Time-dependent approach to spin-vibronic coupling: Implementation and assessment

    SciTech Connect (OSTI)

    Etinski, Mihajlo, E-mail: etinski@ffh.bg.ac.rs [Faculty of Physical Chemistry, University of Belgrade, Studentski Trg 12-16, 11000 Belgrade (Serbia)] [Faculty of Physical Chemistry, University of Belgrade, Studentski Trg 12-16, 11000 Belgrade (Serbia); Rai-Constapel, Vidisha; Marian, Christel M. [Institute of Theoretical and Computational Chemistry, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf (Germany)] [Institute of Theoretical and Computational Chemistry, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf (Germany)

    2014-03-21

    In this work, we present the generalization of a time-dependent method for the calculation of intersystem crossing (ISC) rates in the Condon approximation. When ISC takes place between electronic states with the same orbital type, i.e., when the transition is forbidden according to the El-Sayed rules, it is necessary to go beyond the Condon approximation. Similar to the Herzberg-Teller expansion of the vibronic interaction, the electronic spin–orbit matrix elements are assumed to depend linearly on the nuclear coordinates. The ISC rate is then a sum of three contributions: a direct, mixed direct-vibronic, and vibronic term. The method, presented in this work, is based on the generating function formalism and the multi-mode harmonic oscillator approximation. In addition to the zero-temperature case, we implemented formulae for finite-temperature conditions assuming a Boltzmann population of vibrational levels in the initial state. Tests have been carried out for a variety of molecules for which literature data were available. We computed vibronic one-photon spectra of free-base porphyrin and free-base chlorin and calculated ISC rates for xanthone, thioxanthone, thionine, as well as free-base porphyrin and found excellent agreement with previous results. Quantitative rates for triplet formation in rhodamine A have been determined theoretically for the first time. We find the S{sub 1}? T{sub 2} channel to be the major source of triplet rhodamine formation in the gas phase.