Sample records for resampling process variable

  1. Resampling inhomogeneous marked point processes

    E-Print Network [OSTI]

    Garner, William John

    2011-01-01T23:59:59.000Z

    in block j near the edge (2nd case) Joint probabilities fordifferent blocks Notice that whenever the joint probabilityby these blocks. (The maximum width is For the joint

  2. Industrial applications of variable frequency microwave energy in materials processing

    SciTech Connect (OSTI)

    Fathi, Z.; Tucker, D.A.; Lewis, W.A.; Wei, J.B. [Lambda Technologies, Inc., Raleigh, NC (United States)

    1996-12-31T23:59:59.000Z

    A review of some market-driven research, process applications and systems development is provided. The variable frequency microwave processing concepts are briefly described. Industrial processing using variable frequency microwave energy in the areas of polymerization, composite processing, bonding and plasma is discussed. Analytical applications inherent in the use of variable frequency and its control are demonstrated in the areas of materials signature analysis for volumetric cure monitoring.

  3. Bayesian variable selection in clustering via dirichlet process mixture models

    E-Print Network [OSTI]

    Kim, Sinae

    2007-09-17T23:59:59.000Z

    simultane- ously. I use Dirichlet process mixture models to define the cluster structure and to introduce in the model a latent binary vector to identify discriminating variables. I update the variable selection index using a Metropolis algorithm and obtain...

  4. Process for applying control variables having fractal structures

    DOE Patents [OSTI]

    Bullock, IV, Jonathan S. (Oak Ridge, TN); Lawson, Roger L. (Oliver Springs, TN)

    1996-01-01T23:59:59.000Z

    A process and apparatus for the application of a control variable having a fractal structure to a body or process. The process of the present invention comprises the steps of generating a control variable having a fractal structure and applying the control variable to a body or process reacting in accordance with the control variable. The process is applicable to electroforming where first, second and successive pulsed-currents are applied to cause the deposition of material onto a substrate, such that the first pulsed-current, the second pulsed-current, and successive pulsed currents form a fractal pulsed-current waveform.

  5. Process for applying control variables having fractal structures

    DOE Patents [OSTI]

    Bullock, J.S. IV; Lawson, R.L.

    1996-01-23T23:59:59.000Z

    A process and apparatus are disclosed for the application of a control variable having a fractal structure to a body or process. The process of the present invention comprises the steps of generating a control variable having a fractal structure and applying the control variable to a body or process reacting in accordance with the control variable. The process is applicable to electroforming where first, second and successive pulsed-currents are applied to cause the deposition of material onto a substrate, such that the first pulsed-current, the second pulsed-current, and successive pulsed currents form a fractal pulsed-current waveform. 3 figs.

  6. Multiscale modeling of spatially variable water and energy balance processes

    E-Print Network [OSTI]

    Famiglietti, J. S; Wood, E. F

    1994-01-01T23:59:59.000Z

    MULTISCALE WATER AND ENERGY BALANCE MODELING Wood, E. F. ,spatially variable water and energy balance processes J. S.modeling. Water and energy balance models are developed at

  7. Analysis of Process Variable Effects on the Roller Imprinting Process

    E-Print Network [OSTI]

    Vijayaraghavan, Athulan; Hayse-Gregson, Stuart; Valdez, Rodolfo; Dornfeld, David

    2008-01-01T23:59:59.000Z

    of metal forming processes,” Computers and Structures, Vol.2006). “A roller embossing process for rapid fabrication ofdesign of industrial forging processes,” Journal of Material

  8. Capturing Variability in Business Process Models: The Provop Approach

    E-Print Network [OSTI]

    Ulm, Universität

    Capturing Variability in Business Process Models: The Provop Approach Alena Hallerbach1 , Thomas be transferred to cross-organizational business processes as well [4]. A business process model captures models there exists a multitude of tools like ARIS Business Architect [5], ADONIS [6], and Web

  9. Practical microarray analysis resampling and the bootstrap Berlin, January 2003 1

    E-Print Network [OSTI]

    Spang, Rainer

    Practical microarray analysis ­ resampling and the bootstrap Berlin, January 2003 1 Resampling and the Bootstrap Ulrich Mansmann mansmann@imbi.uni-heidelberg.de Practical microarray analysis January 2003 Berlin #12;Practical microarray analysis ­ resampling and the bootstrap Berlin, January 2003 2 Motivation

  10. Monte Carlo Evaluation of Resampling-Based Hypothesis Tests

    E-Print Network [OSTI]

    Boos, Dennis

    of rejections. At each alternative this Monte Carlo estimate will be unbiased for the true power function of the function ( ), where (A) = 1 if A is true and = 0 otherwise. The connection to measurement error methods 1998 Abstract Monte Carlo estimation of the power of tests that require resampling can be very com

  11. Characterization and analysis of process variability in deeply-scaled MOSFETs

    E-Print Network [OSTI]

    Balakrishnan, Karthik, Ph. D. Massachusetts Institute of Technology

    2012-01-01T23:59:59.000Z

    Variability characterization and analysis in advanced technologies are needed to ensure robust performance as well as improved process capability. This thesis presents a framework for device variability characterization ...

  12. Practical microarray analysis resampling and the bootstrap Heidelberg, March 2003 1

    E-Print Network [OSTI]

    Spang, Rainer

    Practical microarray analysis ­ resampling and the bootstrap Heidelberg, March 2003 1 ANOVA and the Bootstrap Ulrich Mansmann mansmann@imbi.uni-heidelberg.de Practical microarray analysis March 2003 Heidelberg #12;Practical microarray analysis ­ resampling and the bootstrap Heidelberg, March 2003 2 Probe

  13. Conditional modeling and the jitter method of spike resampling Asohan Amarasingham,1

    E-Print Network [OSTI]

    Hatsopoulos, Nicholas

    Review Conditional modeling and the jitter method of spike resampling Asohan Amarasingham,1 October 2011 Amarasingham A, Harrison MT, Hatsopoulos NG, Geman S. Conditional modeling and the jitter correct hypoth- esis tests. We focus on the approach to resampling known as jitter. We review a wide range

  14. Volume 0 (1981), Number 0 pp. 17 COMPUTER GRAPHICS forum Resampling Strategies for Deforming MLS Surfaces

    E-Print Network [OSTI]

    Buscaglia, Gustavo C.

    Volume 0 (1981), Number 0 pp. 1­7 COMPUTER GRAPHICS forum Resampling Strategies for Deforming MLS Graphics]: Computational Geometry and Object Modeling G.1.2 [Numerical Analysis]: Approximation G.2

  15. Estimation and Control of Diesel Engine Processes Utilizing Variable...

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

    for multi-cylinder variable geometry turbocharged diesel engine with cooled EGR and flexible intake valve actuation developed to capture dynamic effects of gas exchange actuators...

  16. Conservation Theory Process Control Using Variable Frequency Drives

    E-Print Network [OSTI]

    Myers, N. S.

    1980-01-01T23:59:59.000Z

    name from the vari able DC voltage which the rectifier section pro duces. Variable DC voltage is required in order to produce controlled AC with the volts per hz ratio constant. To operate an AC motor over a speed range from 5-60 hz and still... be capable of producing con stant torque,the ratio: Volts ~ = Constant must be satisfied. The rectifier and inverter stages work in concert to produce variable voltage, variable frequency AC power. The linear relation ship between voltage and frequency...

  17. Towards the Light Front Variables for High Energy Production Processes

    E-Print Network [OSTI]

    N. S. Amaglobeli; S. M. Esakia; V. R. Garsevanishvili; G. O. Kuratashvili; N. K. Kutsidi; R. A. Kvatadze; Yu V. Tevzadze; T. P. Topuria

    1997-03-21T23:59:59.000Z

    Scale invariant presentation of inclusive spectra in terms of light front variables is proposed. The variables introduced go over to the well-known scaling variables x_F = 2p_z/sqrt(s) and x_T=2p_T/sqrt{s} in the high p_z and high p_T limits respectively. So Some surface is found in the phase space of produced pi-mesons in the inclusive reaction anti p p -> pi+- X at 22.4 GeV/c, which separates two groups of particles with significantly different characteristics. In one of these regions a naive statistical model seems to be in a good agreement with data, whereas it fails in the second region. Key words: Light front, inclusive, hadron-hadron, electron-positron, relativistic heavy ions, deep inelastic.

  18. PROCESS DESIGN AND CONTROL Optimal Selection of Controlled Variables

    E-Print Network [OSTI]

    Skogestad, Sigurd

    a centralized online optimizing controller with a continu- ous update of its model parameters. However to "self-regulating control", which is when an acceptable dynamic performance can be achieved with no control (i.e., with constant manipulated variables). Correspond- ingly, "self-optimizing control" is when

  19. Selection of Controlled Variables for a Natural Gas to Liquids Process Mehdi Panahi and Sigurd Skogestad*

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Selection of Controlled Variables for a Natural Gas to Liquids Process Mehdi Panahi and Sigurd variables (CVs) for a natural gas to hydrocarbon liquids (GTL) process based on the idea of self of operation are studied. In mode I, where the natural gas flow rate is given, there are three unconstrained

  20. Optimization of forming load and variables in deep drawing process ...

    E-Print Network [OSTI]

    Ganesh Kakandikar

    2007-03-06T23:59:59.000Z

    Mar 6, 2007 ... Abstract: Sheet metal forming is a significant manufacturing process for producing a large variety of automotive parts and aerospace parts as ...

  1. Adaptive Resampling for Mobile, Real-Time Terrain

    E-Print Network [OSTI]

    Mower, James E.

    TinVariance scans the high-res TIN, searching for samples that exceed the variable local tolerance Scanning works about 3 minutes on a 700 mHz laptop #12;LocalTinVariance Speed Factors Worst-case performance is linear, triangular decomposition of a grid GridToTinVT adds a variable tolerance increasing with distance from

  2. Process control for micro embossing : initial variability study

    E-Print Network [OSTI]

    Ganesan, Balamurugan, 1976-

    2004-01-01T23:59:59.000Z

    The objective of this research is to study the dimensional variations in micro embossed parts. By measuring multiple parts produced with a fixed set of control inputs, it could be determined if the process is in statistical ...

  3. ON RE-SAMPLING OF SOLAR IMAGES C. E. DeFOREST

    E-Print Network [OSTI]

    DeForest, Craig

    ON RE-SAMPLING OF SOLAR IMAGES C. E. DeFOREST Southwest Research Institute, Boulder, CO, U.S.A. (e-mail: deforest@boulder.swri.edu) (Received 14 August; accepted 18 September 2003) Abstract. Digital image data, such as super-radial expansion of a coronal hole (DeForest et al., 1997). While the theory and techniques

  4. Approaches to the multivariate random variables associated with stochastic processes

    E-Print Network [OSTI]

    Yu, Jihnhee

    2004-11-15T23:59:59.000Z

    for the deep compartment. . . . . . . . . . . 71 33 The pharmacokinetic model for pravastatin. The compartment 1, 2, 3, and 4 represent the central, deep, shallow and absorption compartment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 34... developed and applied to pharmacokinetic problems. Matis, Wehrly and Metzler (1983) provide the theoret- ical framework to obtain the mean and variance of a residence time using the transfer coefficient matrix in the compartment model as a Markov process...

  5. 1M. Panahi, S. Skogestad ' Controlled Variables Selection for a Natural Gas to Liquids (GTL) process' Controlled Variables Selection for a

    E-Print Network [OSTI]

    Skogestad, Sigurd

    1M. Panahi, S. Skogestad ' Controlled Variables Selection for a Natural Gas to Liquids (GTL) process' Controlled Variables Selection for a Natural Gas to Liquids (GTL) process Mehdi Panahi Sigurd for a Natural Gas to Liquids (GTL) process' Skogestad plantwide control procedure* I Top Down · Step 1: Identify

  6. Multi-perspective Process Variability: A Case for Smart Green Buildings (Short Paper)

    E-Print Network [OSTI]

    Dustdar, Schahram

    environments, such as smart city management. In this paper, we present a comprehensive analysis representation. Keywords-smart city; smart building; variability; process configuration; I. INTRODUCTION Recently Building (SGB) and smart city management [1]. Generally, sustain- ability analysis and governance in those

  7. Simulating variable source problems via post processing of individual particle tallies

    SciTech Connect (OSTI)

    Bleuel, D.L.; Donahue, R.J.; Ludewigt, B.A.; Vujic, J.

    2000-10-20T23:59:59.000Z

    Monte Carlo is an extremely powerful method of simulating complex, three dimensional environments without excessive problem simplification. However, it is often time consuming to simulate models in which the source can be highly varied. Similarly difficult are optimization studies involving sources in which many input parameters are variable, such as particle energy, angle, and spatial distribution. Such studies are often approached using brute force methods or intelligent guesswork. One field in which these problems are often encountered is accelerator-driven Boron Neutron Capture Therapy (BNCT) for the treatment of cancers. Solving the reverse problem of determining the best neutron source for optimal BNCT treatment can be accomplished by separating the time-consuming particle-tracking process of a full Monte Carlo simulation from the calculation of the source weighting factors which is typically performed at the beginning of a Monte Carlo simulation. By post-processing these weighting factors on a recorded file of individual particle tally information, the effect of changing source variables can be realized in a matter of seconds, instead of requiring hours or days for additional complete simulations. By intelligent source biasing, any number of different source distributions can be calculated quickly from a single Monte Carlo simulation. The source description can be treated as variable and the effect of changing multiple interdependent source variables on the problem's solution can be determined. Though the focus of this study is on BNCT applications, this procedure may be applicable to any problem that involves a variable source.

  8. Effect of process variables on the quality attributes of briquettes from wheat, oat, canola and barley

    SciTech Connect (OSTI)

    Jaya Shankar Tumuluru

    2011-08-01T23:59:59.000Z

    Effect of process variables on the quality attributes of briquettes from wheat, oat, canola and barley straw Jaya Shankar Tumuluru*, L. G. Tabil, Y. Song, K. L. Iroba and V. Meda Biomass is a renewable energy source and environmentally friendly substitute for fossil fuels such as coal and petroleum products. Major limitation of biomass for successful energy application is its low bulk density, which makes it very difficult and costly to transport and handle. To overcome this limitation, biomass has to be densified. The commonly used technologies for densification of biomass are pelletization and briquetting. Briquetting offers many advantages at it can densify larger particles sizes of biomass at higher moisture contents. Briquetting is influenced by a number of feedstock and process variables such as moisture content, particle size distribution, and some operating variables such as temperature and densification pressure. In the present study, experiments were designed and conducted based on Box-Behnken design to produce briquettes using barley, wheat, canola and barley straws. A laboratory scale hydraulic briquette press was used for the present study. The experimental process variables and their levels used in the present study were pressure levels (7.5, 10, 12.5 MPa), three levels of temperature (90, 110, 130 C), at three moisture content levels (9, 12, 15% w.b.), and three levels of particle size (19.1, 25.04, 31.75 mm). The quality variables studied includes moisture content, initial density and final briquette density after two weeks of storage, size distribution index and durability. The raw biomass was initially chopped and size reduced using a hammer mill. The ground biomass was conditioned at different moisture contents and was further densified using laboratory hydraulic press. For each treatment combination, ten briquettes were manufactured at a residence time of about 30 s after compression pressure setpoint was achieved. After compression, the initial dimensions and the final dimensions after 2 weeks of storage in controlled environment of all the samples were measured. Durability, dimensional stability, and moisture content tests were conducted after two weeks of storage of the briquettes produced. Initial results indicated that moisture content played a significant role on briquettes durability, stability, and density. Low moisture content of the straws (7-12%) gave more durable briquettes. Briquette density increased with increasing pressure depending on the moisture content value. The axial expansion was more significant than the lateral expansion, which in some cases tended to be nil depending on the material and operating variables. Further data analysis is in progress in order to understand the significance of the process variables based on ANOVA. Regression models were developed to predict the changes in quality of briquettes with respect of the process variables under study. Keywords: Herbaceous biomass, densification, briquettes, density, durability, dimensional stability, ANOVA and regression equations

  9. Quantifying the source of reentrant line variability and the effects of processes standardization on tool availability variability

    E-Print Network [OSTI]

    Peavey, Milo Camp

    2007-01-01T23:59:59.000Z

    This thesis quantifies the sensitivity of tool availability variability with respect to product throughput and examines how Intel's High Precision Maintenance initiative can be used to minimize these effects. Tools with ...

  10. ANTARCTIC SEA ICE BIOLOGICAL PROCESSES, INTERACTIONS, AND VARIABILITY ANTARCTIC RESEARCH SERIES, VOLUME 73, PAGES 45-83

    E-Print Network [OSTI]

    Moline, Mark

    conducted in pack ice communities that flowed into the vicin- ity of Palmer Station, Antarctica, between August and November, 1993. Pack ice provided incomplete protection to frazil ice algae from the damaging--../ ANTARCTIC SEA ICE BIOLOGICAL PROCESSES, INTERACTIONS, AND VARIABILITY ANTARCTIC RESEARCH

  11. SYNTHESIS Disturbance-driven changes in the variability of ecological patterns and processes

    E-Print Network [OSTI]

    Fraterrigo, Jennifer

    by considering disturbance extent, frequency and intensity, as well as ecosystem recovery, and thereby capturesREVIEW AND SYNTHESIS Disturbance-driven changes in the variability of ecological patterns Understanding how disturbance shapes the dynamics of ecological systems is of fundamental importance in ecology

  12. Sensitivity Analysis of Optimal Operation of an Activated Sludge Process Model for Economic Controlled Variable Selection

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Sensitivity Analysis of Optimal Operation of an Activated Sludge Process Model for Economic operation conducted on an activated sludge process model based on the test-bed benchmark simulation model no. 1 (BSM1) and the activated sludge model no. 1 (ASM1). The objective is to search for a control

  13. Interpretation of North Pacific Variability as a Short and Long Memory Process

    E-Print Network [OSTI]

    Percival, Don

    ) and -- spectral density function (SDF) . essential di#erence between processes -- AR(1) ACVS dies down quickly and variance # 2 # 3. |#| SDF given by s X,# # cov{X t , X t zero and variance # 2 # 3. |#| 0) . ACVS and SDF given

  14. Interpretation of North Pacific Variability as a Short and Long Memory Process

    E-Print Network [OSTI]

    Percival, Don

    ) and ­ spectral density function (SDF) · essential difference between processes ­ AR(1) ACVS dies down quickly, then Xt is white noise) · ACVS and SDF given by sX, cov{Xt, Xt+ } = 2 || 1 - 2 & SX(f) = 2 1 + 2 - 2 cos with mean zero and variance 2 3. || 0) · ACVS and SDF given

  15. Radial Basis Function Neural Networks in Variable Structure Control of a Class of Biochemical Processes

    E-Print Network [OSTI]

    Wilamowski, Bogdan Maciej

    is that the method presented does not require the analytical details describing the plant dynamics available. I conditions and unknown plant dynamics. In this paper, an analytic approach towards the calculation@ieee.org X.Yu@cqu.edu.au Abstract ­ Biochemical processes often display a complicated dynamic behavior

  16. DESIGN OF SOFTWARE SENSORS FOR UNMEASURABLE VARIABLES OF ANAEROBIC DIGESTION PROCESSES

    E-Print Network [OSTI]

    Boyer, Edmond

    stirred tank bioreactors (CSTR), the organic matter is depolluted by microorganisms into biogas (Deublein and Steinhauser, 2008). The biogas is an additional energy source which can replace fossil fuel processes are too expensive to be measured. In practice, only biogas flow rate can be easily measured on

  17. NERI PROJECT 99-119. TASK 2. DATA-DRIVEN PREDICTION OF PROCESS VARIABLES. FINAL REPORT

    SciTech Connect (OSTI)

    Upadhyaya, B.R.

    2003-04-10T23:59:59.000Z

    This report describes the detailed results for task 2 of DOE-NERI project number 99-119 entitled ''Automatic Development of Highly Reliable Control Architecture for Future Nuclear Power Plants''. This project is a collaboration effort between the Oak Ridge National Laboratory (ORNL,) The University of Tennessee, Knoxville (UTK) and the North Carolina State University (NCSU). UTK is the lead organization for Task 2 under contract number DE-FG03-99SF21906. Under task 2 we completed the development of data-driven models for the characterization of sub-system dynamics for predicting state variables, control functions, and expected control actions. We have also developed the ''Principal Component Analysis (PCA)'' approach for mapping system measurements, and a nonlinear system modeling approach called the ''Group Method of Data Handling (GMDH)'' with rational functions, and includes temporal data information for transient characterization. The majority of the results are presented in detailed reports for Phases 1 through 3 of our research, which are attached to this report.

  18. Sensitivity of global tropical climate to land surface processes: Mean state and interannual variability

    SciTech Connect (OSTI)

    Ma, Hsi-Yen; Xiao, Heng; Mechoso, C. R.; Xue, Yongkang

    2013-03-01T23:59:59.000Z

    This study examines the sensitivity of global tropical climate to land surface processes (LSP) using an atmospheric general circulation model both uncoupled (with prescribed SSTs) and coupled to an oceanic general circulation model. The emphasis is on the interactive soil moisture and vegetation biophysical processes, which have first order influence on the surface energy and water budgets. The sensitivity to those processes is represented by the differences between model simulations, in which two land surface schemes are considered: 1) a simple land scheme that specifies surface albedo and soil moisture availability, and 2) the Simplified Simple Biosphere Model (SSiB), which allows for consideration of interactive soil moisture and vegetation biophysical process. Observational datasets are also employed to assess the reality of model-revealed sensitivity. The mean state sensitivity to different LSP is stronger in the coupled mode, especially in the tropical Pacific. Furthermore, seasonal cycle of SSTs in the equatorial Pacific, as well as ENSO frequency, amplitude, and locking to the seasonal cycle of SSTs are significantly modified and more realistic with SSiB. This outstanding sensitivity of the atmosphere-ocean system develops through changes in the intensity of equatorial Pacific trades modified by convection over land. Our results further demonstrate that the direct impact of land-atmosphere interactions on the tropical climate is modified by feedbacks associated with perturbed oceanic conditions ("indirect effect" of LSP). The magnitude of such indirect effect is strong enough to suggest that comprehensive studies on the importance of LSP on the global climate have to be made in a system that allows for atmosphere-ocean interactions.

  19. Effect of process variables on the density and durability of the pellets made from high moisture corn stover

    SciTech Connect (OSTI)

    Jaya Shankar Tumuluru

    2014-03-01T23:59:59.000Z

    A flat die pellet mill was used to understand the effect of high levels of feedstock moisture content in the range of 28–38% (w.b.), with die rotational speeds of 40–60 Hz, and preheating temperatures of 30–110 °C on the pelleting characteristics of 4.8 mm screen size ground corn stover using an 8 mm pellet die. The physical properties of the pelletised biomass studied are: (a) pellet moisture content, (b) unit, bulk and tapped density, and (c) durability. Pelletisation experiments were conducted based on central composite design. Analysis of variance (ANOVA) indicated that feedstock moisture content influenced all of the physical properties at P < 0.001. Pellet moisture content decreased with increase in preheating temperature to about 110 °C and decreasing the feedstock moisture content to about 28% (w.b.). Response surface models developed for quality attributes with respect to process variables has adequately described the process with coefficient of determination (R2) values of >0.88. The other pellet quality attributes such as unit, bulk, tapped density, were maximised at feedstock moisture content of 30–33% (w.b.), die speeds of >50 Hz and preheating temperature of >90 °C. In case of durability a medium moisture content of 33–34% (w.b.) and preheating temperatures of >70 °C and higher die speeds >50 Hz resulted in high durable pellets. It can be concluded from the present study that feedstock moisture content, followed by preheating, and die rotational speed are the interacting process variables influencing pellet moisture content, unit, bulk and tapped density and durability.

  20. Analyses by the Defense Waste Processing Facility Laboratory of Thorium Glasses from the Sludge Batch 6 Variability Study

    SciTech Connect (OSTI)

    Edwards, T.; Click, D.; Feller, M.

    2011-02-28T23:59:59.000Z

    The Savannah River Remediation (SRR) Defense Waste Processing Facility (DWPF) is currently processing Sludge Batch 6 (SB6) with Frit 418. At times during the processing of this glass system, thorium is expected to be at concentrations in the final wasteform that make it a reportable element for the first time since startup of radioactive operations at the DWPF. The Savannah River National Laboratory (SRNL) supported the qualification of the processing of this glass system at the DWPF. A recommendation from the SRNL studies was the need for the DWPF Laboratory to establish a method to measure thorium by Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICPAES). This recommendation led to the set of thorium-bearing glasses from the SB6 Variability Study (VS) being submitted to the DWPF Laboratory for chemical composition measurement. The measurements were conducted by the DWPF Laboratory using the sodium peroxide fusion preparation method routinely employed for analysis of samples from the Slurry Mix Evaporator (SME). These measurements are presented and reviewed in this report. The review indicates that the measurements provided by the DWPF Laboratory are comparable to those provided by Analytical Development's laboratory at SRNL for these same glasses. As a result, the authors of this report recommend that the DWPF Laboratory begin using its routine peroxide fusion dissolution method for the measurement of thorium in SME samples of SB6. The purpose of this technical report is to present the measurements generated by the DWPF Laboratory for the SB6 VS glasses and to compare the measurements to the targeted compositions for these VS glasses as well as to SRNL's measurements (both sets, targeted and measured, of compositional values were reported by SRNL in [2]). The goal of these comparisons is to provide information that will lead to the qualification of peroxide fusion dissolution as a method for the measurement by the DWPF Laboratory of thorium in SME glass samples.

  1. Morphological variability in long-distance subject-verb agreement: A study of native and nonnative processing

    E-Print Network [OSTI]

    Ocampo, Sally Ann

    2013-05-31T23:59:59.000Z

    This study examined morphosyntactic variability in Spanish-speaking learners of English in order to determine the effects of two linguistic factors on the establishment of subject-verb agreement: structural distance and ...

  2. Collaborative Research: Process-Resolving Decomposition of the Global Temperature Response to Modes of Low Frequency Variability in a Changing Climate

    SciTech Connect (OSTI)

    Deng, Yi

    2014-11-24T23:59:59.000Z

    DOE-GTRC-05596 11/24/2104 Collaborative Research: Process-Resolving Decomposition of the Global Temperature Response to Modes of Low Frequency Variability in a Changing Climate PI: Dr. Yi Deng (PI) School of Earth and Atmospheric Sciences Georgia Institute of Technology 404-385-1821, yi.deng@eas.gatech.edu El Niño-Southern Oscillation (ENSO) and Annular Modes (AMs) represent respectively the most important modes of low frequency variability in the tropical and extratropical circulations. The projection of future changes in the ENSO and AM variability, however, remains highly uncertain with the state-of-the-science climate models. This project conducted a process-resolving, quantitative evaluations of the ENSO and AM variability in the modern reanalysis observations and in climate model simulations. The goal is to identify and understand the sources of uncertainty and biases in models’ representation of ENSO and AM variability. Using a feedback analysis method originally formulated by one of the collaborative PIs, we partitioned the 3D atmospheric temperature anomalies and surface temperature anomalies associated with ENSO and AM variability into components linked to 1) radiation-related thermodynamic processes such as cloud and water vapor feedbacks, 2) local dynamical processes including convection and turbulent/diffusive energy transfer and 3) non-local dynamical processes such as the horizontal energy transport in the oceans and atmosphere. In the past 4 years, the research conducted at Georgia Tech under the support of this project has led to 15 peer-reviewed publications and 9 conference/workshop presentations. Two graduate students and one postdoctoral fellow also received research training through participating the project activities. This final technical report summarizes key scientific discoveries we made and provides also a list of all publications and conference presentations resulted from research activities at Georgia Tech. The main findings include: 1) the distinctly different roles played by atmospheric dynamical processes in establishing surface temperature response to ENSO at tropics and extratropics (i.e., atmospheric dynamics disperses energy out of tropics during ENSO warm events and modulate surface temperature at mid-, high-latitudes through controlling downward longwave radiation); 2) the representations of ENSO-related temperature response in climate models fail to converge at the process-level particularly over extratropics (i.e., models produce the right temperature responses to ENSO but with wrong reasons); 3) water vapor feedback contributes substantially to the temperature anomalies found over U.S. during different phases of the Northern Annular Mode (NAM), which adds new insight to the traditional picture that cold/warm advective processes are the main drivers of local temperature responses to the NAM; 4) the overall land surface temperature biases in the latest NCAR model (CESM1) are caused by biases in surface albedo while the surface temperature biases over ocean are related to multiple factors including biases in model albedo, cloud and oceanic dynamics, and the temperature biases over different ocean basins are also induced by different process biases. These results provide a detailed guidance for process-level model turning and improvement, and thus contribute directly to the overall goal of reducing model uncertainty in projecting future changes in the Earth’s climate system, especially in the ENSO and AM variability.

  3. Nonlinear Statistical Signal Processing: A Particle Filtering Approach

    SciTech Connect (OSTI)

    Candy, J

    2007-09-19T23:59:59.000Z

    A introduction to particle filtering is discussed starting with an overview of Bayesian inference from batch to sequential processors. Once the evolving Bayesian paradigm is established, simulation-based methods using sampling theory and Monte Carlo realizations are discussed. Here the usual limitations of nonlinear approximations and non-gaussian processes prevalent in classical nonlinear processing algorithms (e.g. Kalman filters) are no longer a restriction to perform Bayesian inference. It is shown how the underlying hidden or state variables are easily assimilated into this Bayesian construct. Importance sampling methods are then discussed and shown how they can be extended to sequential solutions implemented using Markovian state-space models as a natural evolution. With this in mind, the idea of a particle filter, which is a discrete representation of a probability distribution, is developed and shown how it can be implemented using sequential importance sampling/resampling methods. Finally, an application is briefly discussed comparing the performance of the particle filter designs with classical nonlinear filter implementations.

  4. Mixture-process variable approach to optimize a microemulsion electrokinetic chromatography method for the quality control of a nutraceutical based on coenzyme Q10

    SciTech Connect (OSTI)

    Piepel, Gregory F.; Pasquini, Benedetta; Cooley, Scott K.; Heredia-Langner, Alejandro; Orlandini, Serena; Furlanetto, Sandra

    2012-08-15T23:59:59.000Z

    In recent years, multivariate optimization has played an increasing role in analytical method development. ICH guidelines recommend using statistical design of experiments to identify the design space, in which multivariate combinations of composition variables and process variables have been demonstrated to provide quality results. Considering a microemulsion electrokinetic chromatography method (MEEKC), the performance of the electrophoretic run depends on the proportions of mixture components (MCs) of the microemulsion and on the values of process variables (PVs). In the present work, for the first time in the literature, a mixture-process variable (MPV) approach was applied to optimize a MEEKC method for the analysis of coenzyme Q10 (Q10), ascorbic acid (AA), and folic acid (FA) contained in nutraceuticals. The MCs (buffer, surfactant-cosurfactant, oil) and the PVs (voltage, buffer concentration, buffer pH) were simultaneously changed according to a MPV experimental design. A 62-run MPV design was generated using the I-optimality criterion, assuming a 46-term MPV model allowing for special-cubic blending of the MCs, quadratic effects of the PVs, and some MC-PV interactions. The obtained data were used to develop MPV models that express the performance of an electrophoretic run (measured as peak efficiencies of Q10, AA, and FA) in terms of the MCs and PVs. Contour and perturbation plots were drawn for each of the responses. Finally, the MPV models and criteria for the peak efficiencies were used to develop the design space and an optimal subregion (i.e., the settings of the mixture MCs and PVs that satisfy the respective criteria), as well as a unique optimal combination of MCs and PVs.

  5. A Hybrid approach to molecular continuum processes combiningGaussian basis functions and the discrete variable representation

    SciTech Connect (OSTI)

    Rescigno, Thomas N.; Horner, Daniel A.; Yip, Frank L.; McCurdy,C. William

    2005-08-29T23:59:59.000Z

    Gaussian basis functions, routinely employed in molecular electronic structure calculations, can be combined with numerical grid-based functions in a discrete variable representation to provide an efficient method for computing molecular continuum wave functions. This approach, combined with exterior complex scaling, obviates the need for slowly convergent single-center expansions, and allows one to study a variety of electron-molecule collision problems. The method is illustrated by computation of various bound and continuum properties of H2+.

  6. A new approach in data visualization to integrate time and space variability of daylighting in the design process

    E-Print Network [OSTI]

    Yi, Lu, S.M. Massachusetts Institute of Technology

    2008-01-01T23:59:59.000Z

    Daylighting design has great impact on the performance and aesthetical quality of a work of architecture but requires many issues to be addressed during the design process. The way existing daylighting tools deliver data ...

  7. On some expectation and derivative operators related to integral representations of random variables with respect to a PII process

    E-Print Network [OSTI]

    Goutte, Stéphane; Russo, Francesco

    2012-01-01T23:59:59.000Z

    Given a process with independent increments $X$ (not necessarily a martingale) and a large class of square integrable r.v. $H=f(X_T)$, $f$ being the Fourier transform of a finite measure $\\mu$, we provide explicit Kunita-Watanabe and F\\"ollmer-Schweizer decompositions. The representation is expressed by means of two significant maps: the expectation and derivative operators related to the characteristics of $X$. We also provide an explicit expression for the variance optimal error when hedging the claim $H$ with underlying process $X$. Those questions are motivated by finding the solution of the celebrated problem of global and local quadratic risk minimization in mathematical finance.

  8. A hybridGaussian-discrete variable representation approach to molecular continuum processes II: application to photoionization of diatomic Li2+

    SciTech Connect (OSTI)

    Rescigno, Thomas N; Yip, Frank L.; McCurdy, C. William; Rescigno, Thomas N.

    2008-08-01T23:59:59.000Z

    We describe an approach for studying molecular photoionization with a hybrid basis that combines the functionality of analytic basis sets to represent electronic coordinates near the nuclei of a molecule with numerically-defined grid-based functions. We discuss the evaluation of the various classes of two-electron integrals that occur in a hybrid basis consisting of Gaussian type orbitals (GTOs) and discrete variable representation (DVR) functions. This combined basis is applied to calculate single photoionization cross sections for molecular Li_2+, which has a large equilibrium bond distance (R=5.86a_0). The highly non-spherical nature of Li_2+ molecules causes higher angular momentum components to contribute significantly to the cross section even at low photoelectron energies, resulting in angular distributions that appear to be f-wave dominated near the photoionization threshold. At higher energies, where the de Broglie wavelength of the photoelectron becomes comparable with the bond distance, interference effects appear in the photoionization cross section. These interference phenomena appear at much lower energies than would be expected for diatomic targets with shorter internuclear separations.

  9. A three-dimensional analysis of the flow and heat transfer for the modified chemical vapor deposition process including buoyancy, variable properties, and tube rotation

    SciTech Connect (OSTI)

    Lin, Y.T.; Choi, M.; Greif, R. (Univ. of California, Berkeley (USA))

    1991-05-01T23:59:59.000Z

    A study has been made of the heat transfer, flow, and particle deposition relative to the modified chemical vapor deposition (MCVD) process. The effects of variable properties, buoyancy, and tube rotation have been included in the study. The resulting three-dimensional temperature and velocity fields have been obtained for a range of conditions. The effects of buoyancy result in asymmetric temperature and axial velocity profiles with respect to the tube axis. Variable properties cause significant variations in the axial velocity along the tube and in the secondary flow in the region near the torch. Particle trajectories are shown to be strongly dependent on the tube rotation and are helices for large rotational speeds. The component of secondary flow in the radial direction is compared to the thermophoretic velocity, which is the primary cause of particle deposition in the MCVD process. Over the central portion of the tube the radial component of the secondary flow is most important in determining the motion of the particles.

  10. Cataclysmic Variables

    E-Print Network [OSTI]

    Robert Connon Smith

    2007-01-23T23:59:59.000Z

    Cataclysmic variables are binary stars in which a relatively normal star is transferring mass to its compact companion. This interaction gives rise to a rich range of behaviour, of which the most noticeable are the outbursts that give the class its name. Novae belong to the class, as do the less well known dwarf novae and magnetic systems. Novae draw their energy from nuclear reactions, while dwarf novae rely on gravity to power their smaller eruptions. All the different classes of cataclysmic variable can be accommodated within a single framework and this article will describe the framework, review the properties of the main types of system and discuss models of the outbursts and of the long-term evolution.

  11. Differential Wiener process

    E-Print Network [OSTI]

    Penny, Will

    Stochastic Processes Will Penny Stochastic Differential Equations Wiener process Sample Paths OU Process Stochastic Chain Rule Change of variables Time-varying functions Multivariate SDE Expectations Wiener Process OU Process Neural Population Fitzhugh Nagumo Gaussian approximation FN Population Fokker

  12. Quantum information with modular variables

    E-Print Network [OSTI]

    A. Ketterer; S. P. Walborn; A. Keller; T. Coudreau; P. Milman

    2014-06-24T23:59:59.000Z

    We introduce a novel strategy, based on the use of modular variables, to encode and deterministically process quantum information using states described by continuous variables. Our formalism leads to a general recipe to adapt existing quantum information protocols, originally formulated for finite dimensional quantum systems, to infinite dimensional systems described by continuous variables. This is achieved by using non unitary and non-gaussian operators, obtained from the superposition of gaussian gates, together with adaptative manipulations in qubit systems defined in infinite dimensional Hilbert spaces. We describe in details the realization of single and two qubit gates and briefly discuss their implementation in a quantum optical set-up.

  13. Variable Speed Pumping for Level Control 

    E-Print Network [OSTI]

    Vasel, M.

    1982-01-01T23:59:59.000Z

    The purpose of this paper is to describe an application of variable speed pumping to level control of an industrial process. Topics include a comparison of the process using control valves with a variable speed system, an energy savings and cost...

  14. Variable Speed Pumping for Level Control

    E-Print Network [OSTI]

    Vasel, M.

    1982-01-01T23:59:59.000Z

    The purpose of this paper is to describe an application of variable speed pumping to level control of an industrial process. Topics include a comparison of the process using control valves with a variable speed system, an energy savings and cost...

  15. Variable metric conjugate gradient methods

    SciTech Connect (OSTI)

    Barth, T.; Manteuffel, T.

    1994-07-01T23:59:59.000Z

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

  16. Variable Valve Actuation

    SciTech Connect (OSTI)

    Jeffrey Gutterman; A. J. Lasley

    2008-08-31T23:59:59.000Z

    Many approaches exist to enable advanced mode, low temperature combustion systems for diesel engines - such as premixed charge compression ignition (PCCI), Homogeneous Charge Compression Ignition (HCCI) or other HCCI-like combustion modes. The fuel properties and the quantity, distribution and temperature profile of air, fuel and residual fraction in the cylinder can have a marked effect on the heat release rate and combustion phasing. Figure 1 shows that a systems approach is required for HCCI-like combustion. While the exact requirements remain unclear (and will vary depending on fuel, engine size and application), some form of substantially variable valve actuation is a likely element in such a system. Variable valve actuation, for both intake and exhaust valve events, is a potent tool for controlling the parameters that are critical to HCCI-like combustion and expanding its operational range. Additionally, VVA can be used to optimize the combustion process as well as exhaust temperatures and impact the after treatment system requirements and its associated cost. Delphi Corporation has major manufacturing and product development and applied R&D expertise in the valve train area. Historical R&D experience includes the development of fully variable electro-hydraulic valve train on research engines as well as several generations of mechanical VVA for gasoline systems. This experience has enabled us to evaluate various implementations and determine the strengths and weaknesses of each. While a fully variable electro-hydraulic valve train system might be the 'ideal' solution technically for maximum flexibility in the timing and control of the valve events, its complexity, associated costs, and high power consumption make its implementation on low cost high volume applications unlikely. Conversely, a simple mechanical system might be a low cost solution but not deliver the flexibility required for HCCI operation. After modeling more than 200 variations of the mechanism it was determined that the single cam design did not have enough flexibility to satisfy three critical OEM requirements simultaneously, (maximum valve lift variation, intake valve opening timing and valve closing duration), and a new approach would be necessary. After numerous internal design reviews including several with the OEM a dual cam design was developed that had the flexibility to meet all motion requirements. The second cam added complexity to the mechanism however the cost was offset by the deletion of the electric motor required in the previous design. New patent applications including detailed drawings and potential valve motion profiles were generated and alternate two cam designs were proposed and evaluated for function, cost, reliability and durability. Hardware was designed and built and testing of sample hardware was successfully completed on an engine test stand. The mechanism developed during the course of this investigation can be applied by Original Equipment Manufacturers, (OEM), to their advanced diesel engines with the ultimate goal of reducing emissions and improving fuel economy. The objectives are: (1) Develop an optimal, cost effective, variable valve actuation (VVA) system for advanced low temperature diesel combustion processes. (2) Design and model alternative mechanical approaches and down-select for optimum design. (3) Build and demonstrate a mechanism capable of application on running engines.

  17. Response of South American ecosystems to precipitation variability

    SciTech Connect (OSTI)

    Ganguly, Auroop R [ORNL; Erickson III, David J [ORNL; Bras, Rafael L [ORNL

    2009-12-01T23:59:59.000Z

    The Ecosystem Demography Model 2 is a dynamic ecosystem model and land surface energy balance model. ED2 discretizes landscapes of particular terrain and meteorology into fractional areas of unique disturbance history. Each fraction, defined by a shared vertical soil column and canopy air space, contains a stratum of plant groups unique in functional type, size and number density. The result is a vertically distributed representation of energy transfer and plant dynamics (mortality, productivity, recruitment, disturbance, resource competition, etc) that successfully approximates the behaviour of individual-based vegetation models. In previous exercises simulating Amazonian land surface dynamics with ED2, it was observed that when using grid averaged precipitation as an external forcing the resulting water balance typically over-estimated leaf interception and leaf evaporation while under estimating through-fall and transpiration. To investigate this result, two scenario were conducted in which land surface biophysics and ecosystem demography over the Northern portion of South America are simulated over {approx}200 years: (1) ED2 is forced with grid averaged values taken from the ERA40 reanalysis meteorological dataset; (2) ED2 is forced with ERA40 reanalysis, but with its precipitation re-sampled to reflect statistical qualities of point precipitation found at rain gauge stations in the region. The findings in this study suggest that the equilibrium moisture states and vegetation demography are co-dependent and show sensitivity to temporal variability in precipitation. These sensitivities will need to be accounted for in future projections of coupled climate-ecosystem changes in South America.

  18. Portfolio Resampling on Various Financial Models

    E-Print Network [OSTI]

    Chen, Yu-Ching Eugene

    2013-01-01T23:59:59.000Z

    the six approaches, theReturns Markowitz SIM_SS SIM_NSS CCM_SS CCM_NSS MGM_SS Equal S&P500 Index Figure 3.2: Performanceof returns, M arkowitz > CCM SS ? SIM N SS > M GM > SIM SS >

  19. artritis reumatoide variables: Topics by E-print Network

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

    Summary: Many particle physics analyses which need to discriminate some background process from a signal ignore event-by-event resolutions of kinematic variables. Adding...

  20. algunas variables relacionadas: Topics by E-print Network

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

    Summary: Many particle physics analyses which need to discriminate some background process from a signal ignore event-by-event resolutions of kinematic variables. Adding...

  1. Ashtekar's variables without spin

    E-Print Network [OSTI]

    Thomas Schucker

    2009-06-26T23:59:59.000Z

    Ashtekar's variables are shown to arise naturally from a 3+1 split of general relativity in the Einstein-Cartan formulation. Thereby spinors are exorcised.

  2. Dynamic control of remelting processes

    DOE Patents [OSTI]

    Bertram, Lee A. (Dublin, CA); Williamson, Rodney L. (Albuquerque, NM); Melgaard, David K. (Albuquerque, NM); Beaman, Joseph J. (Austin, TX); Evans, David G. (Clinton, NY)

    2000-01-01T23:59:59.000Z

    An apparatus and method of controlling a remelting process by providing measured process variable values to a process controller; estimating process variable values using a process model of a remelting process; and outputting estimated process variable values from the process controller. Feedback and feedforward control devices receive the estimated process variable values and adjust inputs to the remelting process. Electrode weight, electrode mass, electrode gap, process current, process voltage, electrode position, electrode temperature, electrode thermal boundary layer thickness, electrode velocity, electrode acceleration, slag temperature, melting efficiency, cooling water temperature, cooling water flow rate, crucible temperature profile, slag skin temperature, and/or drip short events are employed, as are parameters representing physical constraints of electroslag remelting or vacuum arc remelting, as applicable.

  3. Understanding Biomass Feedstock Variability

    SciTech Connect (OSTI)

    Kevin L. Kenney; William A. Smith; Garold L. Gresham; Tyler L. Westover

    2013-01-01T23:59:59.000Z

    If the singular goal of biomass logistics and the design of biomass feedstock supply systems is to reduce the per ton supply cost of biomass, these systems may very well develop with ultimate unintended consequences of highly variable and reduced quality biomass feedstocks. This paper demonstrates that due to inherent species variabilities, production conditions, and differing harvest, collection, and storage practices, this is a very real scenario that biomass producers and suppliers as well as conversion developers should be aware of. Biomass feedstock attributes of ash, carbohydrates, moisture, and particle morphology will be discussed. We will also discuss specifications for these attributes, inherent variability of these attributes in biomass feedstocks, and approaches and solutions for reducing variability for improving feedstock quality.

  4. Understanding Biomass Feedstock Variability

    SciTech Connect (OSTI)

    Kevin L. Kenney; Garold L. Gresham; William A. Smith; Tyler L. Westover

    2013-01-01T23:59:59.000Z

    If the singular goal of biomass logistics and the design of biomass feedstock supply systems is to reduce the per-ton supply cost of biomass, these systems may very well develop with ultimate unintended consequences of highly variable and reduced quality biomass feedstocks. This paper demonstrates that, due to inherent species variabilities, production conditions and differing harvest, collection and storage practices, this is a very real scenario that biomass producers and suppliers as well as conversion developers should be aware of. Biomass feedstock attributes of ash, carbohydrates, moisture and particle morphology will be discussed. We will also discuss specifications for these attributes, inherent variability of these attributes in biomass feedstocks, and approaches and solutions for reducing variability for improving feedstock quality.

  5. Dimensional variability of production steel castings

    SciTech Connect (OSTI)

    Peters, F.E.; Risteu, J.W.; Vaupel, W.G.; DeMeter, E.C.; Voigt, R.C.

    1994-12-31T23:59:59.000Z

    Work is ongoing to characterize the dimensional variability of steel casting features. Data are being collected from castings produced at representative Steel Founders` Society of America foundries. Initial results based on more than 12,500 production casting feature measurements are presented for carbon and low alloy steel castings produced in green sand, no-bake, and shell molds. A comprehensive database of casting, pattern, and feature variables has been developed so that the influence of the variables on dimensional variability can be determined. Measurement system analysis is conducted to insure that large measurement error is not reported as dimensional variability. Results indicate that the dimensional variability of production casting features is less than indicated in current US (SFSA) and international (ISO) standards. Feature length, casting weight, parting line and molding process all strongly influence dimensional variability. Corresponding pattern measurements indicate that the actual shrinkage amount for casting features varies considerably. This variation in shrinkage will strongly influence the ability of the foundry to satisfy customer dimensional requirements.

  6. Feature Space Resampling for Protein Conformational Search Short title: Protein Feature Space Resampling

    E-Print Network [OSTI]

    Jordan, Michael I.

    , 2009 #12;Abstract De novo protein structure prediction requires location of the lowest energy state, and beta pairings. For each of these there is one "native" value: the one found in the native structure. We occurrences and the energy distribution in conformations containing them. A second round of structure

  7. The Sun is an active, variable,

    E-Print Network [OSTI]

    Christian, Eric

    The Sun is an active, variable, magnetic star with oscillations on its surface and deep within its the physical processes of the Sun-Earth connection. Visit Us on the Web: Solar Terrestrial Probes Program: http://stp.gsfc.nasa.gov For More Information, See: Sun-Earth Connection: http://sec.gsfc.nasa.gov Living With a Star: http

  8. Variable Length Path Coupling Thomas P. Hayes

    E-Print Network [OSTI]

    Hayes, Thomas

    length path coupling theorem, we im- prove the upper bound on the mixing time of the Glauber dynamics . By a "coupling" for this chain, we will mean a joint stochastic process (Xt, Yt) on × such that eachVariable Length Path Coupling Thomas P. Hayes Eric Vigoda July 17, 2006 Abstract We present a new

  9. Variable nonlinear resistances

    E-Print Network [OSTI]

    Howard, James Edgar

    1955-01-01T23:59:59.000Z

    VARIETAL". NONLINEAR RESIS'IANCES A Thes1s JA'. 4ES EDGAR HOWARD as to style and content by Head Department January 1955 LIBRARY A 4 IS COLLEGE PF TEXAS VARIABLE NONLINEAR RESISTANCES A Thesis By JAMES EDGAR HOWARD Submitted...

  10. Variable frequency microwave furnace system

    DOE Patents [OSTI]

    Bible, Don W. (Clinton, TN); Lauf, Robert J. (Oak Ridge, TN)

    1994-01-01T23:59:59.000Z

    A variable frequency microwave furnace system (10) designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity (34) for testing or other selected applications. The variable frequency microwave furnace system (10) includes a microwave signal generator (12) or microwave voltage-controlled oscillator (14) for generating a low-power microwave signal for input to the microwave furnace. A first amplifier (18) may be provided to amplify the magnitude of the signal output from the microwave signal generator (12) or the microwave voltage-controlled oscillator (14). A second amplifier (20) is provided for processing the signal output by the first amplifier (18). The second amplifier (20) outputs the microwave signal input to the furnace cavity (34). In the preferred embodiment, the second amplifier (20) is a traveling-wave tube (TWT). A power supply (22) is provided for operation of the second amplifier (20). A directional coupler (24) is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter (30) is provided for measuring the power delivered to the microwave furnace (32). A second power meter (26) detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load (28).

  11. Variable frequency microwave furnace system

    DOE Patents [OSTI]

    Bible, D.W.; Lauf, R.J.

    1994-06-14T23:59:59.000Z

    A variable frequency microwave furnace system designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity for testing or other selected applications. The variable frequency microwave furnace system includes a microwave signal generator or microwave voltage-controlled oscillator for generating a low-power microwave signal for input to the microwave furnace. A first amplifier may be provided to amplify the magnitude of the signal output from the microwave signal generator or the microwave voltage-controlled oscillator. A second amplifier is provided for processing the signal output by the first amplifier. The second amplifier outputs the microwave signal input to the furnace cavity. In the preferred embodiment, the second amplifier is a traveling-wave tube (TWT). A power supply is provided for operation of the second amplifier. A directional coupler is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter is provided for measuring the power delivered to the microwave furnace. A second power meter detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load. 5 figs.

  12. Statistical High-Level Synthesis under Process

    E-Print Network [OSTI]

    Giles, C. Lee

    designers is process variability, which causes considerable fluctu- ations in performance and power with variability has be- come one of the major design focuses for nanoscale VLSI design. Traditionally, performanceStatistical High-Level Synthesis under Process Variability Yuan Xie and Yibo Chen Pennsylvania

  13. Variable depth core sampler

    DOE Patents [OSTI]

    Bourgeois, P.M.; Reger, R.J.

    1996-02-20T23:59:59.000Z

    A variable depth core sampler apparatus is described comprising a first circular hole saw member, having longitudinal sections that collapses to form a point and capture a sample, and a second circular hole saw member residing inside said first hole saw member to support the longitudinal sections of said first hole saw member and prevent them from collapsing to form a point. The second hole saw member may be raised and lowered inside said first hole saw member. 7 figs.

  14. Variable Crop Share Leases.

    E-Print Network [OSTI]

    Sartin, Marvin; Sammons, Ray

    1980-01-01T23:59:59.000Z

    )OC lAL45.7 173 1. 1224 Texas Agricultural Extension Service The Texas A&M University System Daniel C. Pfannstiel,Director colleg e Station, Texas / f , ' '~ :';,; ,,: ''': ~ " k , -~. _Variable _Crop Share _Leases ... Marvin... Sartin and Ray Sammons* Renting or leasing farmland is part of many modern farming operations and increases average farm size in U. S. agriculture. Economies of size are vitally import ant to farm operations as they strive to cope with the continuous...

  15. Variable Frequency Pump Drives

    E-Print Network [OSTI]

    Karassik, I. J.; Petraccaro, L. L.; McGuire, J. T.

    . In a conventional pump and driver arrangement (for example, a centrifugal pump coupled to an AC induction motor'with no speed control provision), the motor runs at. a constant speed, which is determined by the incoming line frequency, and the pump... when it is needed. LONG RANGE DESIGN TRENDS The growing use of variable-frequency electric motor drives will permit the integration of 60 and 50 cycle pump lines. One important concern for future improvements is the growing possibility...

  16. ANALYSIS OF VARIABILITY IN PRECASTING AND INSTALLATION OF PILE FOUNDATIONS

    E-Print Network [OSTI]

    Tommelein, Iris D.

    1 ANALYSIS OF VARIABILITY IN PRECASTING AND INSTALLATION OF PILE FOUNDATIONS Hasan Kaplan1-stressed precast foundation piles using data collected on a building project that comprised the installation of more than 340 piles. The objective is to assess the presence of product and process variability

  17. A UML 2 Profile for Variability Models and their Dependency to Business Birgit Korherr and Beate List

    E-Print Network [OSTI]

    or a petrol engine is chosen, changes the process flow. The goals of this paper are to: · provide variability

  18. Effects of variable wind stress on ocean heat content

    E-Print Network [OSTI]

    Klima, Kelly

    2008-01-01T23:59:59.000Z

    Ocean heat content change (ocean heat uptake) has an important role in variability of the Earth's heat balance. The understanding of which methods and physical processes control ocean heat uptake needs improvement in order ...

  19. Multi-variable optimization of pressurized oxy-coal combustion

    E-Print Network [OSTI]

    Zebian, Hussam

    2011-01-01T23:59:59.000Z

    Simultaneous multi-variable gradient-based optimization with multi-start is performed on a 300 MWe wet-recycling pressurized oxy-coal combustion process with carbon capture and sequestration. The model accounts for realistic ...

  20. Control of Variable Geometry Turbocharged Diesel Engines for Reduced Emissions

    E-Print Network [OSTI]

    Stefanopoulou, Anna

    the turbine. A turbine with variable geometry uses inlet guide vanes (located on the turbine stator) to modify supplied by the compressor. This process is referred to as exhaust gas re- circulation (EGR). It is

  1. Diagnosing spatial variation patterns in manufacturing processes

    E-Print Network [OSTI]

    Lee, Ho Young

    2004-09-30T23:59:59.000Z

    This dissertation discusses a method that will aid in diagnosing the root causes of product and process variability in complex manufacturing processes when large quantities of multivariate in-process measurement data are available. As in any data...

  2. Continuous variable entanglement on a chip

    E-Print Network [OSTI]

    Genta Masada; Kazunori Miyata; Alberto Politi; Toshikazu Hashimoto; Jeremy L. O'Brien; Akira Furusawa

    2015-05-29T23:59:59.000Z

    Encoding quantum information in continuous variables (CV)---as the quadrature of electromagnetic fields---is a powerful approach to quantum information science and technology. CV entanglement---light beams in Einstein-Podolsky-Rosen (EPR) states---is a key resource for quantum information protocols; and enables hybridisation between CV and single photon discrete variable (DV) qubit systems. However, CV systems are currently limited by their implementation in free-space optical networks: increased complexity, low loss, high-precision alignment and stability, as well as hybridisation, demand an alternative approach. Here we show an integrated photonic implementation of the key capabilities for CV quantum technologies---generation and characterisation of EPR beams in a photonic chip. Combined with integrated squeezing and non-Gaussian operation, these results open the way to universal quantum information processing with light.

  3. Nanoscale Bulk MOSFET Design and Process Technology for Reduced Variability

    E-Print Network [OSTI]

    Sun, Xin

    2010-01-01T23:59:59.000Z

    pp. 32-33, 1963. [5] F. M. Wanlass, “Low stand-by powerin August 1963. [4] F. M. Wanlass and C. T. Sah, “Nanowatt

  4. Optimization of forming load and variables in deep drawing process ...

    E-Print Network [OSTI]

    cadserver

    2007-02-08T23:59:59.000Z

    The failure limit diagram for original geometry shows some failure points (Red) where ... Learning” Pearson Education Pvt.Ltd.India, pp 290-292, 2003. [5] Deb K

  5. Roughness variability estimation of microscopic surfaces during engineering wear process-

    E-Print Network [OSTI]

    Boyer, Edmond

    consists of a femoral stem with a femoral head placed on the upper part of the stem, made of stainless, UMR CNRS 5037 Ecole Nationale Sup´erieure des Mines de Saint-Etienne 158 cours Fauriel, 42023, Saint strongly the bone structure, [2], such as changing the osteoclast, and osteoblast activity which might lead

  6. Nanoscale Bulk MOSFET Design and Process Technology for Reduced Variability

    E-Print Network [OSTI]

    Sun, Xin

    2010-01-01T23:59:59.000Z

    superior electrostatic integrity as well as significantlyhas good electrostatic integrity as well as minimal V Tgood electrostatic integrity as well as minimal threshold

  7. Process variables controlling consistency of carbon nanotube forest growth

    E-Print Network [OSTI]

    Vincent, Hanna Megumi

    2014-01-01T23:59:59.000Z

    Aligned arrays of carbon nanotubes (A-CNTs), called CNT forests, are the precursor for controlled-morphology macroscopic nanocomposites and nanoengineered composites due to theirscale-dependent, tunable physicall properties. ...

  8. Estimation and Control of Diesel Engine Processes Utilizing Variable Intake

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:RevisedAdvisoryStandardGeneration |10 DOEGoals DuringMarkets - EAC 2011Valve

  9. Variable rate CELP speech coding using widely variable parameter updates

    E-Print Network [OSTI]

    Moodie, Myron L.

    1995-01-01T23:59:59.000Z

    bit rates for a given quality level. This work develops new techniques, referred to as widely variable CELP parameter updates, which dynamically adapt the transmit frequency of the CELP spectral parameters to the characteristics of the input speech...

  10. Plasma heating in a variable magnetic field

    SciTech Connect (OSTI)

    Kichigin, G. N., E-mail: king@iszf.irk.ru [Russian Academy of Sciences, Institute of Solar-Terrestrial Physics (Russian Federation)

    2013-05-15T23:59:59.000Z

    The problem of particle acceleration in a periodically variable magnetic field that either takes a zero value or passes through zero is considered. It is shown that, each time the field [0]passes through zero, the particle energy increases abruptly. This process can be regarded as heating in the course of which plasma particles acquire significant energy within one field period. This mechanism of plasma heating takes place in the absence of collisions between plasma particles and is analogous to the mechanism of magnetic pumping in collisional plasma considered by Alfven.

  11. MID-INFRARED SPECTRAL VARIABILITY ATLAS OF YOUNG STELLAR OBJECTS

    SciTech Connect (OSTI)

    Kospal, A. [Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA, Leiden (Netherlands); Abraham, P.; Kun, M.; Moor, A. [Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, P.O. Box 67, 1525 Budapest (Hungary); Acosta-Pulido, J. A. [Instituto de Astrofisica de Canarias, Via Lactea s/n, 38200 La Laguna, Tenerife (Spain); Dullemond, C. P. [Institut fuer Theoretische Astrophysik, Zentrum fuer Astronomie der Universitaet Heidelberg, Albert-Ueberle-Str. 2, 69120 Heidelberg (Germany); Henning, Th.; Leinert, Ch. [Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, 69117 Heidelberg (Germany); Turner, N. J., E-mail: akospal@rssd.esa.int [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States)

    2012-08-01T23:59:59.000Z

    Optical and near-infrared variability is a well-known property of young stellar objects. However, a growing number of recent studies claim that a considerable fraction of them also exhibit mid-infrared flux changes. With the aim of studying and interpreting variability on a decadal timescale, here we present a mid-infrared spectral atlas containing observations of 68 low- and intermediate-mass young stellar objects. The atlas consists of 2.5-11.6 {mu}m low-resolution spectra obtained with the ISOPHOT-S instrument on board the Infrared Space Observatory (ISO) between 1996 and 1998, as well as 5.2-14.5 {mu}m low-resolution spectra obtained with the Infrared Spectrograph instrument on board the Spitzer Space Telescope between 2004 and 2007. The observations were retrieved from the ISO and Spitzer archives and were post-processed interactively by our own routines. For those 47 objects where multi-epoch spectra were available, we analyze mid-infrared spectral variability on annual and/or decadal timescales. We identify 37 variable candidate sources. Many stars show wavelength-independent flux changes, possibly due to variable accretion rates. In several systems, all exhibiting 10 {mu}m silicate emission, the variability of the 6-8 {mu}m continuum, and the silicate feature exhibit different amplitudes. A possible explanation is variable shadowing of the silicate-emitting region by an inner disk structure of changing height or extra silicate emission from dust clouds in the disk atmosphere. Our results suggest that mid-infrared variability, in particular, the wavelength-dependent changes, is more ubiquitous than was known before. Interpreting this variability is a new possibility for exploring the structure of the disk and its dynamical processes.

  12. Anyonic statistics with continuous variables

    E-Print Network [OSTI]

    Jing Zhang; Changde Xie; Kunchi Peng; Peter van Loock

    2008-10-30T23:59:59.000Z

    We describe a continuous-variable scheme for simulating the Kitaev lattice model and for detecting statistics of abelian anyons. The corresponding quantum optical implementation is solely based upon Gaussian resource states and Gaussian operations, hence allowing for a highly efficient creation, manipulation, and detection of anyons. This approach extends our understanding of the control and application of anyons and it leads to the possibility for experimental proof-of-principle demonstrations of anyonic statistics using continuous-variable systems.

  13. Managing Variability throughout the Software Development Lifecycle

    E-Print Network [OSTI]

    Managing Variability throughout the Software Development Lifecycle Neil Loughran and Awais Rashid levels of the software development lifecycle, especially when new requirements arise. We believe of the software development lifecycle. Moreover, the effects of variability and, in particular, new variabilities

  14. Efficient Resampling, Compression and Rendering of Metallic and Pearlescent Paint

    E-Print Network [OSTI]

    Behnke, Sven

    a complex, pure stochastic spatial structure and an- gular dependent color shifts. Hybrid approaches by measuring real paint sam- ples and split the data into a homogeneous (spatially invariant) part and slow decoding speed. The stochastic nature of the spatial and angular varia- tions of metallic paints

  15. Resampling Methodology in Spatial Prediction and Repeated Measures Time Series

    E-Print Network [OSTI]

    Rister, Krista Dianne

    2012-02-14T23:59:59.000Z

    ?Z?(s0)/E?Z??(s0) where E? denotes the conditional expectation given Y. Then, the bootstrap-based bias-corrected predictors of Z(s0) are given by Z?BCA (s0) = Z?(s0) + a?n, and Z?BCM (s0) = c?n ? Z? B(s0). In practice, a?n and c?n are evaluated..., the Monte-Carlo approximation to a?n and c?n are given by a?MCn ? 1 B [ B? j=1 Z?j(s0)? B? j=1 Z??j(s0) ] , and c?MCn ? ?B j=1 Z ?j(s0) ?B j=1 Z? ?j(s0) , respectively. 2. Unknown Parameters For real applications, the value...

  16. Renewable variable speed hybrid system 

    E-Print Network [OSTI]

    Stott, Paul Anthony

    2010-01-01T23:59:59.000Z

    generator island grids, these generators will be running at a fraction of maximum output for most of the time. A new variable speed diesel generator allows for a reduction in fuel consumption at part load compared to constant speed operation. Combining...

  17. Variable Structure Control of a

    E-Print Network [OSTI]

    Ge, Shuzhi Sam

    . INTRODUCTION Modelling and control of flexible link manipulators have been studied intensively controller for regulation of a flexible beam. Due to its simplicity and robustness to parametricVariable Structure Control of a Distributed-Parameter Flexible Beam S. S. Ge,* T. H. Lee, G. Zhu, F

  18. Operating Reserves and Variable Generation

    SciTech Connect (OSTI)

    Ela, E.; Milligan, M.; Kirby, B.

    2011-08-01T23:59:59.000Z

    This report tries to first generalize the requirements of the power system as it relates to the needs of operating reserves. It also includes a survey of operating reserves and how they are managed internationally in system operations today and then how new studies and research are proposing they may be managed in the future with higher penetrations of variable generation.

  19. IMPROVED VARIABLE STAR SEARCH IN LARGE PHOTOMETRIC DATA SETS: NEW VARIABLES IN CoRoT FIELD LRa02 DETECTED BY BEST II

    SciTech Connect (OSTI)

    Fruth, T.; Cabrera, J.; Csizmadia, Sz.; Eigmueller, P.; Erikson, A.; Kirste, S.; Pasternacki, T.; Rauer, H.; Titz-Weider, R. [Institut fuer Planetenforschung, Deutsches Zentrum fuer Luft- und Raumfahrt, Rutherfordstr. 2, 12489 Berlin (Germany); Kabath, P. [European Southern Observatory, Alonso de Cordova 3107, Vitacura, Casilla 19001, Santiago 19 (Chile); Chini, R.; Lemke, R. [Astronomisches Institut, Ruhr-Universitaet Bochum, 44780 Bochum (Germany); Murphy, M., E-mail: thomas.fruth@dlr.de [Depto. Fisica, Universidad Catolica del Norte, PO 1280, Antofagasta (Chile)

    2012-06-15T23:59:59.000Z

    The CoRoT field LRa02 has been observed with the Berlin Exoplanet Search Telescope II (BEST II) during the southern summer 2007/2008. A first analysis of stellar variability led to the publication of 345 newly discovered variable stars. Now, a deeper analysis of this data set was used to optimize the variability search procedure. Several methods and parameters have been tested in order to improve the selection process compared to the widely used J index for variability ranking. This paper describes an empirical approach to treat systematic trends in photometric data based upon the analysis of variance statistics that can significantly decrease the rate of false detections. Finally, the process of reanalysis and method improvement has virtually doubled the number of variable stars compared to the first analysis by Kabath et al. A supplementary catalog of 272 previously unknown periodic variables plus 52 stars with suspected variability is presented. Improved ephemerides are given for 19 known variables in the field. In addition, the BEST II results are compared with CoRoT data and its automatic variability classification.

  20. WECC Variable Generation Planning Reference Book

    SciTech Connect (OSTI)

    Makarov, Yuri V.; Du, Pengwei; Etingov, Pavel V.; Ma, Jian; Vyakaranam, Bharat

    2013-05-14T23:59:59.000Z

    This planning reference book is a document reflecting a Western Electricity Coordination Council (WECC) effort to put together multiple sources of information and provide a clear, systemic, comprehensive outline of the problems, both existing and anticipated; their impacts on the system; currently used and proposed solutions by the industry and research community; planning practices; new technologies, equipment, and standards; and expected future trends. This living (periodically updated) document could help WECC and other practicing engineers, especially the younger generation of engineers joining the workforce, to get familiar with a large variety of information related to the integration of variable resources into the WECC system, bypassing in part the need for time-consuming information gathering and learning processes from more experienced engineers or from the literature.

  1. alarm processing techniques: Topics by E-print Network

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

    with known structures Jiandong to analyze the root cause of alarms arisen in industrial process variables. The relation among alarm one child node exits so that its...

  2. Cranial Variability in Amazonian Marmosets

    E-Print Network [OSTI]

    Aguiar, John Marshall

    2011-02-22T23:59:59.000Z

    (Callithrix, Callitrichidae) have been discovered in recent years, as well as the exceptional dwarf marmoset Callibella humilis. Most of these species were described on the basis of their pelage and presumed separation by major rivers. I performed... analyses of craniometric variables by taxa and by river basins, in order to determine if there are significant cranial distinctions between taxa separated by rivers. I analyzed quantitative cranial and mandibular characters of Callibella humilis...

  3. Optimization of Wind Power and Its Variability With a Computational Intelligence Approach

    E-Print Network [OSTI]

    Kusiak, Andrew

    Optimization of Wind Power and Its Variability With a Computational Intelligence Approach Zijun is presented for maximizing the generation of wind power while minimizing its variability. In the optimization model, data-driven approaches are used to model the wind-power generation process based on industrial

  4. Evaluating variable switching and flash methods in modeling carbon sequestration in deep geologic formations

    E-Print Network [OSTI]

    Mills, Richard

    Evaluating variable switching and flash methods in modeling carbon sequestration in deep geologic performance computing to assess the risks involved in carbon sequestration in deep geologic formations-thermal- chemical processes in variably saturated, non-isothermal porous media is applied to sequestration

  5. HIGH LEVEL WASTE SLUDGE BATCH 4 VARIABILITY STUDY

    SciTech Connect (OSTI)

    Fox, K; Tommy Edwards, T; David Peeler, D; David Best, D; Irene Reamer, I; Phyllis Workman, P

    2006-10-02T23:59:59.000Z

    The Defense Waste Processing Facility (DWPF) is preparing for vitrification of High Level Waste (HLW) Sludge Batch 4 (SB4) in early FY2007. To support this process, the Savannah River National Laboratory (SRNL) has provided a recommendation to utilize Frit 503 for vitrifying this sludge batch, based on the composition projection provided by the Liquid Waste Organization on June 22, 2006. Frit 418 was also recommended for possible use during the transition from SB3 to SB4. A critical step in the SB4 qualification process is to demonstrate the applicability of the durability models, which are used as part of the DWPF's process control strategy, to the glass system of interest via a variability study. A variability study is an experimentally-driven assessment of the predictability and acceptability of the quality of the vitrified waste product that is anticipated from the processing of a sludge batch. At the DWPF, the durability of the vitrified waste product is not directly measured. Instead, the durability is predicted using a set of models that relate the Product Consistency Test (PCT) response of a glass to the chemical composition of that glass. In addition, a glass sample is taken during the processing of that sludge batch, the sample is transmitted to SRNL, and the durability is measured to confirm acceptance. The objective of a variability study is to demonstrate that these models are applicable to the glass composition region anticipated during the processing of the sludge batch - in this case the Frit 503 - SB4 compositional region. The success of this demonstration allows the DWPF to confidently rely on the predictions of the durability/composition models as they are used in the control of the DWPF process.

  6. Variable flexure-based fluid filter

    DOE Patents [OSTI]

    Brown, Steve B.; Colston Jr., Billy W.; Marshall, Graham; Wolcott, Duane

    2007-03-13T23:59:59.000Z

    An apparatus and method for filtering particles from a fluid comprises a fluid inlet, a fluid outlet, a variable size passage between the fluid inlet and the fluid outlet, and means for adjusting the size of the variable size passage for filtering the particles from the fluid. An inlet fluid flow stream is introduced to a fixture with a variable size passage. The size of the variable size passage is set so that the fluid passes through the variable size passage but the particles do not pass through the variable size passage.

  7. Processing Science

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

    Processing Science Related to the Electron Beam Melting Additive Manufacturing Process October 14 th , 2014 Ryan Dehoff Metal Additive Manufacturing Thrust Lead Manufacturing...

  8. Selection Process

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

    Selection Process Selection Process Fellowships will be awarded based on academic excellence, relevance of candidate's research to the laboratory mission in fundamental nuclear...

  9. Proposal Process

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

    Proposal Process Network R&D Overview Experimental Network Testbeds 100G SDN Testbed Testbed Description Testbed Results Current Testbed Research Proposal Process Terms and...

  10. Deconvolution of variable rate reservoir performance data using B-splines

    E-Print Network [OSTI]

    Ilk, Dilhan

    2007-04-25T23:59:59.000Z

    of permanent downhole gauges and large-scale processing/analysis of production data. Under these circumstances, our objective is to create a robust and practical tool which can tolerate reasonable variability and relatively large errors in rate and pressure...

  11. Variable Temperature STM/AFM | EMSL

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

    STMAFM Variable Temperature STMAFM EMSL's ultra-high vacuum, variable-temperature scanning probe microscope system, or UHV VT SPM, is a state-of-the-art surface science tool...

  12. Interannual variability in tropospheric nitrous oxide

    E-Print Network [OSTI]

    Thompson, R. L.

    Observations of tropospheric N2O mixing ratio show significant variability on interannual timescales (0.2?ppb, 1 standard deviation). We found that interannual variability in N2O is weakly correlated with that in CFC-12 ...

  13. Thermoacoustic tomography, variable sound speed Plamen Stefanov

    E-Print Network [OSTI]

    Stefanov, Plamen

    Thermoacoustic tomography, variable sound speed Plamen Stefanov Purdue University Based on a joint work with Gunther Uhlmann Plamen Stefanov (Purdue University ) Thermoacoustic tomography, variable sound speed 1 / 18 #12;Formulation Main Problem Thermoacoustic Tomography In thermoacoustic tomography

  14. SLUDGE BATCH 7B GLASS VARIABILITY STUDY

    SciTech Connect (OSTI)

    Johnson, F.; Edwards, T.

    2011-10-25T23:59:59.000Z

    The Defense Waste Processing Facility (DWPF) is preparing to initiate processing Sludge Batch 7b (SB7b). In support of the upcoming processing, the Savannah River National Laboratory (SRNL) provided a recommendation to utilize Frits 418 with a 6% Na{sub 2}O addition (26 wt% Na{sub 2}O in sludge) and 702 with a 4% Na{sub 2}O addition (24 wt% Na{sub 2}O in sludge) to process SB7b. This recommendation was based on assessments of the compositional projections for SB7b available at the time from the Savannah River Remediation (SRR). To support qualification of SB7b, SRNL executed a variability study to assess the applicability of the current durability models for SB7b. The durability models were assessed over the expected composition range of SB7b, including potential caustic additions, combined with Frits 702 and 418 over a 32-40% waste loading (WL) range. Thirty four glasses were selected based on Frits 418 and 702 coupled with the sludge projections with an additional 4-6% Na{sub 2}O to reflect the potential caustic addition. Six of these glasses, based on average nominal sludge compositions including the appropriate caustic addition, were developed for both Frit 418 and Frit 702 at 32, 36 and 40% WL to provide coverage in the center of the anticipated SB7b glass region. All glasses were fabricated and characterized using chemical composition analysis, X-ray diffraction (XRD) and the Product Consistency Test (PCT). To comply with the DWPF Glass Product Control Program, a total of thirty four glasses were fabricated to assess the applicability of the current DWPF PCCS durability models. Based on the measured PCT response, all of the glasses were acceptable with respect to the Environmental Assessment (EA) benchmark glass regardless of thermal history. The NL[B] values of the SB7b variability study glasses were less than 1.99 g/L as compared to 16.695 g/L for EA. A small number of the D-optimally selected 'outer layer' extreme vertices (EV) glasses were not predictable using the current Product Composition Control System (PCCS) models for durability, but were acceptable compared to the EA glass when tested. These glasses fell outside of the lower 95% confidence band, which demonstrates conservatism in the model. A few of the glasses fell outside of the upper 95% confidence band; however, these particular glasses have normalized release values that were much lower than the values of EA and should be of no practical concern. Per the requirements of the DWPF Glass Product Control Program, the PCCS durability models have been shown to be applicable to the SB7b sludge system with a range of Na{sub 2}O concentrations blended with Frits 418 or 702. PCT results from the glasses fabricated as part of the variability study were shown to be predictable by the current DWPF PCCS models and/or acceptable with respect to the EA benchmark glass regardless of thermal history or compositional view.

  15. Process Modeling for Process Improvement A Process Conformance Approach

    E-Print Network [OSTI]

    Process Modeling for Process Improvement - A Process Conformance Approach Sigurd Thunem September processes. In order to improve these processes, knowledge about them is necessary. To support process improve- ment the organization should collect process data, transform process data into knowledge

  16. Please cite this article in press as: S. Kofman, et al., Discovery of multiple level heart-sound morphological variability resulting from changes in physiological states. Biomed. Signal Process. Control (2011), doi:10.1016/j.bspc.2011.08.001

    E-Print Network [OSTI]

    Intrator, Nathan

    2011-01-01T23:59:59.000Z

    information about the mechanical activity of the cardiovascular system. This infor- mation includes the specific physiological state of the subject, and short term variability related to the respiratory cycle include anesthesia and abdominal insufflation, which together with the respiratory cycle, induce changes

  17. Variable residence time vortex combustor

    DOE Patents [OSTI]

    Melconian, Jerry O. (76 Beaver Rd., Reading, MA 01867)

    1987-01-01T23:59:59.000Z

    A variable residence time vortex combustor including a primary combustion chamber for containing a combustion vortex, and a plurality of louvres peripherally disposed about the primary combustion chamber and longitudinally distributed along its primary axis. The louvres are inclined to impel air about the primary combustion chamber to cool its interior surfaces and to impel air inwardly to assist in driving the combustion vortex in a first rotational direction and to feed combustion in the primary combustion chamber. The vortex combustor also includes a second combustion chamber having a secondary zone and a narrowed waist region in the primary combustion chamber interconnecting the output of the primary combustion chamber with the secondary zone for passing only lower density particles and trapping higher density particles in the combustion vortex in the primary combustion chamber for substantial combustion.

  18. Variable delivery, fixed displacement pump

    DOE Patents [OSTI]

    Sommars, Mark F. (Sparland, IL)

    2001-01-01T23:59:59.000Z

    A variable delivery, fixed displacement pump comprises a plurality of pistons reciprocated within corresponding cylinders in a cylinder block. The pistons are reciprocated by rotation of a fixed angle swash plate connected to the pistons. The pistons and cylinders cooperate to define a plurality of fluid compression chambers each have a delivery outlet. A vent port is provided from each fluid compression chamber to vent fluid therefrom during at least a portion of the reciprocal stroke of the piston. Each piston and cylinder combination cooperates to close the associated vent port during another portion of the reciprocal stroke so that fluid is then pumped through the associated delivery outlet. The delivery rate of the pump is varied by adjusting the axial position of the swash plate relative to the cylinder block, which varies the duration of the piston stroke during which the vent port is closed.

  19. Continuously variable focal length lens

    DOE Patents [OSTI]

    Adams, Bernhard W; Chollet, Matthieu C

    2013-12-17T23:59:59.000Z

    A material preferably in crystal form having a low atomic number such as beryllium (Z=4) provides for the focusing of x-rays in a continuously variable manner. The material is provided with plural spaced curvilinear, optically matched slots and/or recesses through which an x-ray beam is directed. The focal length of the material may be decreased or increased by increasing or decreasing, respectively, the number of slots (or recesses) through which the x-ray beam is directed, while fine tuning of the focal length is accomplished by rotation of the material so as to change the path length of the x-ray beam through the aligned cylindrical slows. X-ray analysis of a fixed point in a solid material may be performed by scanning the energy of the x-ray beam while rotating the material to maintain the beam's focal point at a fixed point in the specimen undergoing analysis.

  20. Variable ratio regenerative braking device

    DOE Patents [OSTI]

    Hoppie, Lyle O. (Birmingham, MI)

    1981-12-15T23:59:59.000Z

    Disclosed is a regenerative braking device (10) for an automotive vehicle. The device includes an energy storage assembly (12) having a plurality of rubber rollers (26, 28) mounted for rotation between an input shaft (36) and an output shaft (42), clutches (38, 46) and brakes (40, 48) associated with each shaft, and a continuously variable transmission (22) connectable to a vehicle drivetrain and to the input and output shafts by the respective clutches. The rubber rollers are torsionally stressed to accumulate energy from the vehicle when the input shaft is clutched to the transmission while the brake on the output shaft is applied, and are torsionally relaxed to deliver energy to the vehicle when the output shaft is clutched to the transmission while the brake on the input shaft is applied. The transmission ratio is varied to control the rate of energy accumulation and delivery for a given rotational speed of the vehicle drivetrain.

  1. Thermal Processes

    Broader source: Energy.gov [DOE]

    Some thermal processes use the energy in various resources, such as natural gas, coal, or biomass, to release hydrogen, which is part of their molecular structure. In other processes, heat, in...

  2. Photolytic Processes

    Broader source: Energy.gov [DOE]

    Photolytic processes use the energy in sunlight to separate water into hydrogen and oxygen. These processes are in the very early stages of research but offer long-term potential for sustainable...

  3. Randomness and Earth climate variability

    E-Print Network [OSTI]

    Levinshtein, Michael E; Dmitriev, Alexander P; Shmakov, Pavel M

    2015-01-01T23:59:59.000Z

    Paleo-Sciences including palaeoclimatology and palaeoecology have accumulated numerous records related to climatic changes. The researchers have usually tried to identify periodic and quasi-periodic processes in these paleoscientific records. In this paper, we show that this analysis is incomplete. As follows from our results, random processes, namely processes with a single-time-constant (noise with a Lorentzian noise spectrum), play a very important and, perhaps, a decisive role in numerous natural phenomena. For several of very important natural phenomena the characteristic time constants are very similar and equal to (5-8)x10^3 years. However, this value is not universal. For example, the spectral density fluctuations of the atmospheric radiocarbon 14C are characterized by a Lorentzian with time constant 300 years. The frequency dependence of spectral density fluctuations for benthic 18O records contains two Lorentzians with time constans 8000 years and > 105 years.

  4. Practical Energy Savings and New Process Control Options for Parts Washing and Cleaning Processes

    E-Print Network [OSTI]

    McGinness, M.

    Substantial potential energy savings exist for many parts washing and cleaning processes in use today. Energy usage is frequently the largest single variable cost involved in parts washing and cleaning operations. Several control parameters...

  5. NERC Presentation: Accommodating High Levels of Variable Generation...

    Office of Environmental Management (EM)

    of variable electricity eneration. Variable resources are types of electric power generation that rely on an uncontrolled, "variable" fuel (e.g. wind, sunlight, waves, tidal...

  6. AUTOMATIC VARIABLE VENTILATION CONTROL SYSTEMS BASED ON AIR QUALITY DETECTION

    E-Print Network [OSTI]

    Turiel, Isaac

    2011-01-01T23:59:59.000Z

    ~saon Automatic Variable Ventilation Control Systems Based79-3 Automatic variable ventilation control systems based onof automatic variable ventilation control systems, result in

  7. Shimmed electron beam welding process

    DOE Patents [OSTI]

    Feng, Ganjiang (Clifton Park, NY); Nowak, Daniel Anthony (Alplaus, NY); Murphy, John Thomas (Niskayuna, NY)

    2002-01-01T23:59:59.000Z

    A modified electron beam welding process effects welding of joints between superalloy materials by inserting a weldable shim in the joint and heating the superalloy materials with an electron beam. The process insures a full penetration of joints with a consistent percentage of filler material and thereby improves fatigue life of the joint by three to four times as compared with the prior art. The process also allows variable shim thickness and joint fit-up gaps to provide increased flexibility for manufacturing when joining complex airfoil structures and the like.

  8. UCG process data base

    SciTech Connect (OSTI)

    Thorsness, C.B.; Cena, R.J.

    1980-05-01T23:59:59.000Z

    Process modeling in underground coal gasification (UCG) systems is a useful tool. Often, however, the experimental data necessary to test proposed models and mechanisms is not readily available. To help overcome this problem we describe in this paper a UCG Data Base we are developing to assist in making detailed data from DOE-sponsored field programs easily available. In addition, the data in the current data base are used to summarize the results of the Hoe Creek I, II, and III experiments. A statistical look at these data indicate a general lack of correlation between process variables. A simple gas compositional model is presented and is shown to be consistent with much of the available field data.

  9. Liquid crystal variable retarders in atomic scattering

    SciTech Connect (OSTI)

    Furst, J.E.; Yu, D.H.; Hayes, P.A.; DSouza, C.M.; Williams, J.F. [Physics Department, Centre for Atomic, Molecular, and Surface Physics, The University of Western Australia, Nedlands. WA. 6907 (Australia)] [Physics Department, Centre for Atomic, Molecular, and Surface Physics, The University of Western Australia, Nedlands. WA. 6907 (Australia)

    1996-11-01T23:59:59.000Z

    The applications of liquid crystal variable retarders in the production of spin-polarized electrons and in the determination of the polarization of optical radiation from atoms excited by polarized electrons are discussed. The advantages of using liquid crystal variable retarders in the measurement of Stokes parameters are insensitivity to the incident photon direction, large transmission diameter, variable retardation over large wavelength range without mechanical movement, and {ital in} {ital situ} calibration. {copyright} {ital 1996 American Institute of Physics.}

  10. Eccentric crank variable compression ratio mechanism

    DOE Patents [OSTI]

    Lawrence, Keith Edward (Kobe, JP); Moser, William Elliott (Peoria, IL); Roozenboom, Stephan Donald (Washington, IL); Knox, Kevin Jay (Peoria, IL)

    2008-05-13T23:59:59.000Z

    A variable compression ratio mechanism for an internal combustion engine that has an engine block and a crankshaft is disclosed. The variable compression ratio mechanism has a plurality of eccentric disks configured to support the crankshaft. Each of the plurality of eccentric disks has at least one cylindrical portion annularly surrounded by the engine block. The variable compression ratio mechanism also has at least one actuator configured to rotate the plurality of eccentric disks.

  11. Comparing*the*spatial*structure*of*1" variability*in*two*datasets*against*each*2"

    E-Print Network [OSTI]

    Dommenget, Dietmar

    *Annular*Mode*(SAM).*These*modes*are*assumed*to*be*quasi;fixed*spatial*patterns*36" (Wallace* and* Gutzler*think*of*the*climate*variability*as*a*multi;variate*stochastic*process,*38" which*has*a*continuum*of;variate* stochastic*41" process,* often* the* question* arises:* What* are* the* differences* in* the* spatial

  12. Variable-Period Undulators For Synchrotron Radiation

    DOE Patents [OSTI]

    Shenoy, Gopal (Naperville, IL); Lewellen, John (Plainfield, IL); Shu, Deming (Darien, IL); Vinokurov, Nikolai (Novosibirsk, RU)

    2005-02-22T23:59:59.000Z

    A new and improved undulator design is provided that enables a variable period length for the production of synchrotron radiation from both medium-energy and high-energy storage rings. The variable period length is achieved using a staggered array of pole pieces made up of high permeability material, permanent magnet material, or an electromagnetic structure. The pole pieces are separated by a variable width space. The sum of the variable width space and the pole width would therefore define the period of the undulator. Features and advantages of the invention include broad photon energy tunability, constant power operation and constant brilliance operation.

  13. Variable Temperature UHV STM/AFM | EMSL

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

    Temperature UHV STMAFM The Omicron variable temperature ultra-high vacuum (UHV) scanning tunneling microscope (VTSTM) is designed to study the structure of both clean and...

  14. Optimization Online - Global Optimization via Slack Variables

    E-Print Network [OSTI]

    Isaac Siwale

    2014-08-01T23:59:59.000Z

    Aug 1, 2014 ... Citation: Siwale, I. (2014). Global optimization via slack variables. Technical Report No. RD-16-2013, London: Apex Research Ltd. Download: ...

  15. Linking sedimentological, stratigraphic and diagenetic processes to understand unconventional reservoirs: the Upper Jurassic Vaca

    E-Print Network [OSTI]

    Henderson, Gideon

    Linking sedimentological, stratigraphic and diagenetic processes to understand unconventional as to the scale of sedimentological variability within mudstone successions, and how related diagenetic alteration by Profs Taylor and Flint, to document the scale of sedimentological and diagenetic variability

  16. Plant variability and bio-fuel properties

    SciTech Connect (OSTI)

    Agblevor, F.A.; Besler-Guran, S.; Wiselogel, A.E. [National Renewable Energy Lab., Golden, CO (United States)

    1995-11-01T23:59:59.000Z

    Thermochemically converting biomass feedstocks to fuels is one of the major thrusts of renewable energy research at the National Renewable Energy Laboratory. Among several thermochemical routes is the fast pyrolysis process which produces liquid fuels from woody and herbaceous biomass feedstocks. Because of the large variability in the composition of biomass feedstocks due to plant variety and environmental factors, it is important to assess how these variabilities affect the properties of thermochemical liquid fuels (bio-oils) produced from these resources. Similar varieties of switchgrass (Panicum virgatum L.) that were grown at three different locations and three hybrid poplar clones that were grown at one location were used in these studies. The feedstocks were pyrolyzed in a fluidized bed reactor at 500{degrees}C. The gas products were analyzed on-line and the liquid products were analyzed for elemental composition and higher heating values. Apart from small difference in the yield of char/ash, the yields of pyrolysis oils and gases were similar for switchgrass feedstocks grown at all three locations. The char/ash yields ranged from 21.1 to 22.9%; total liquids (organic liquids + water) yields ranged from 59%-60.5%; and the gas yields ranged from 11%-12% (wt). The higher heating values (HHVs) of the oils were similar (24.3-24.6 MJ/kg). For the hybrid poplar feedstocks, total liquids (65%-69%), char/ash (10%-11%), and gas yields (15.6%-17%) were similar for all three poplar clones; however, the elemental composition and the HHVs of the pyrolysis oils had statistically significant differences. The NC5260 pyrolysis oils had lower HHV (22.0{+-}0.5 MG/kg) compared to the DN clones (23.2{+-}0.3 MJ/kg). The yields of total liquids and organics for the three clones were higher than those for the switchgrass feedstocks. The gas yields for the hybrid poplar clones were higher than for the switchgrass, but had compositions similar to those of the switchgrass feedstocks.

  17. Envera Variable Compression Ratio Engine

    SciTech Connect (OSTI)

    Charles Mendler

    2011-03-15T23:59:59.000Z

    Aggressive engine downsizing, variable compression ratio and use of the Atkinson cycle are being combined to improve fuel economy by up to 40 percent relative to port fuel injected gasoline engines, while maintaining full engine power. Approach Engine downsizing is viewed by US and foreign automobile manufacturers as one of the best options for improving fuel economy. While this strategy has already demonstrated a degree of success, downsizing and fuel economy gains are currently limited. With new variable compression ratio technology however, the degree of engine downsizing and fuel economy improvement can be greatly increased. A small variable compression ratio (VCR) engine has the potential to return significantly higher vehicle fuel economy while also providing high power. Affordability and potential for near term commercialization are key attributes of the Envera VCR engine. VCR Technology To meet torque and power requirements, a smaller engine needs to do more work per stroke. This is typically accomplished by boosting the incoming charge with either a turbo or supercharger so that more energy is present in the cylinder per stroke to do the work. With current production engines the degree of engine boosting (which correlates to downsizing) is limited by detonation (combustion knock) at high boost levels. Additionally, the turbo or supercharger needs to be responsive and efficient while providing the needed boost. VCR technology eliminates the limitation of engine knock at high load levels by reducing compression ratio to {approx}9:1 (or whatever level is appropriate) when high boost pressures are needed. By reducing the compression ratio during high load demand periods there is increased volume in the cylinder at top dead center (TDC) which allows more charge (or energy) to be present in the cylinder without increasing the peak pressure. Cylinder pressure is thus kept below the level at which the engine would begin to knock. When loads on the engine are low the compression ratio can be raised (to as much as 18:1) providing high engine efficiency. It is important to recognize that for a well designed VCR engine cylinder pressure does not need to be higher than found in current production turbocharged engines. As such, there is no need for a stronger crankcase, bearings and other load bearing parts within the VCR engine. The Envera VCR mechanism uses an eccentric carrier approach to adjust engine compression ratio. The crankshaft main bearings are mounted in this eccentric carrier or 'crankshaft cradle' and pivoting the eccentric carrier 30 degrees adjusts compression ratio from 9:1 to 18:1. The eccentric carrier is made up of a casting that provides rigid support for the main bearings, and removable upper bearing caps. Oil feed to the main bearings transits through the bearing cap fastener sockets. The eccentric carrier design was chosen for its low cost and rigid support of the main bearings. A control shaft and connecting links are used to pivot the eccentric carrier. The control shaft mechanism features compression ratio lock-up at minimum and maximum compression ratio settings. The control shaft method of pivoting the eccentric carrier was selected due to its lock-up capability. The control shaft can be rotated by a hydraulic actuator or an electric motor. The engine shown in Figures 3 and 4 has a hydraulic actuator that was developed under the current program. In-line 4-cylinder engines are significantly less expensive than V engines because an entire cylinder head can be eliminated. The cost savings from eliminating cylinders and an entire cylinder head will notably offset the added cost of the VCR and supercharging. Replacing V6 and V8 engines with in-line VCR 4-cylinder engines will provide high fuel economy at low cost. Numerous enabling technologies exist which have the potential to increase engine efficiency. The greatest efficiency gains are realized when the right combination of advanced and new technologies are packaged together to provide the greatest gains at the least cost. Aggressive engine downsiz

  18. Method and system to estimate variables in an integrated gasification combined cycle (IGCC) plant

    DOE Patents [OSTI]

    Kumar, Aditya; Shi, Ruijie; Dokucu, Mustafa

    2013-09-17T23:59:59.000Z

    System and method to estimate variables in an integrated gasification combined cycle (IGCC) plant are provided. The system includes a sensor suite to measure respective plant input and output variables. An extended Kalman filter (EKF) receives sensed plant input variables and includes a dynamic model to generate a plurality of plant state estimates and a covariance matrix for the state estimates. A preemptive-constraining processor is configured to preemptively constrain the state estimates and covariance matrix to be free of constraint violations. A measurement-correction processor may be configured to correct constrained state estimates and a constrained covariance matrix based on processing of sensed plant output variables. The measurement-correction processor is coupled to update the dynamic model with corrected state estimates and a corrected covariance matrix. The updated dynamic model may be configured to estimate values for at least one plant variable not originally sensed by the sensor suite.

  19. THE MULTI-USE STEINEL VARIABLE TEMPERATURE

    E-Print Network [OSTI]

    Kleinfeld, David

    THE MULTI-USE STEINEL VARIABLE TEMPERATURE ELECTRONICALLY CONTROLLED HEAT GUNTEMPERATURE RANGE 212 at the outlet nozzle will bum flesh. Do not tum on Heat Gun with hand in front of nozzle. DO NOT USE NEAR equipment Specifications Temperature Variable from 212" F to 1100° F Watts 1500W Weight 1.5 lbs. Supply

  20. THE MULTI-USE STEINEL VARIABLE TEMPERATURE

    E-Print Network [OSTI]

    Kleinfeld, David

    THE MULTI-USE STEINEL VARIABLE TEMPERATURE ELECTRONICALLY CONTROLLED HEAT GUNTEMPERATURE RANGE 212 at the outlet nozzle will bum flesh. Do not tum on Heat Gun with hand in front of nozzle. DO NOT USE NEAR equipment Specifications Temperature Variable from 212° F to 1100° F Watts 1500W Weight 1.5 lbs. Supply

  1. Solar Dynamics Observatory/ Extreme Ultraviolet Variability Experiment

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    Solar Dynamics Observatory/ EVE Extreme Ultraviolet Variability Experiment Frequently Asked and model solar extreme ultraviolet irradiance variations due to solar flares, solar rotation, and solar and structure of the Sun. What is solar variability? Solar radiation varies on all time scales ranging from

  2. Boosting Search with Variable Elimination. ? Javier Larrosa

    E-Print Network [OSTI]

    Dechter, Rina

    Boosting Search with Variable Elimination. ? Javier Larrosa Dep. Llenguatges i Sistemes Inform#12ElimSearchS;k, a hybrid meta- algorithm that combines search and variable elimination. The param- eter S names from the constraint graph. We also provide experimental evidence that the hybrid algorithm can

  3. Boosting Search with Variable Elimination. ? Javier Larrosa

    E-Print Network [OSTI]

    Dechter, Rina

    Boosting Search with Variable Elimination. ? Javier Larrosa Dep. Llenguatges i Sistemes Inform of variables, reduces the search tree size. In this paper we introduce VarElimSearch(S;k), a hybrid meta the constraint graph. We also provide experimental evidence that the hybrid algorithm can outperform state

  4. The German Vowel System The Control of Token-to-Token Variability: an Experimental and Modeling Study

    E-Print Network [OSTI]

    The German Vowel System The Control of Token-to-Token Variability: an Experimental and Modeling to the motor commands (Modeling) DATA ACQUISITION AND PROCESSING Articulatory data consisted of simultaneous MEASURED ARTICULATORY VARIABILITY General trends for the majority of cases: For low vowels (see left panels

  5. Analysis of two basic variables of timeout 

    E-Print Network [OSTI]

    Zella, William Francis

    1974-01-01T23:59:59.000Z

    ANALYSIS OF TWO BASIC VARIABLES OF TIMEOUT A Thesis WILLIAM FRANCIS ZELLA Submitted to the Graduate College of Texas AaM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August l974 Major Subjects... Psychology ANALYSI QF TWQ BASIC VARIABLES CF TINEQU '. A Thesis V/ILLIAM FRANCIS ZELLA Approved as to s+yle and content bye Chairman of Commi, ee Head of De artment) (Membe Member) Member ABSTRACT Analysis of Two Basic Variables of Timeout. (August...

  6. Using the bootstrap to analyze variable stars data 

    E-Print Network [OSTI]

    Dunlap, Mickey Paul

    2005-02-17T23:59:59.000Z

    ,universal x. The manner in which the tests are carried out depends on the nature of the error terms, Zi. The most common setting is to assume that Z1,...,Zn are independent and identically distributed (i.i.d.) N(0, sigma2) random variables. If the forms... intrinsic variation peculiar to the star and epsilon1i is the mea- surement error at time Ti. It is assumed that I1,...,In similar (0,sigma2I) i.i.d., epsilon10,...,epsilon1n similar (0,sigma2epsilon1 ) i.i.d., and the process {Ii} is independent of {epsilon...

  7. Variable temperature electrochemical strain microscopy of Sm-doped ceria

    SciTech Connect (OSTI)

    Jesse, Stephen [ORNL; Morozovska, A. N. [National Academy of Science of Ukraine, Kiev, Ukraine; Kalinin, Sergei V [ORNL; Eliseev, E. A. [National Academy of Science of Ukraine, Kiev, Ukraine; Yang, Nan [ORNL; Doria, Sandra [ORNL; Tebano, Antonello [ORNL

    2013-01-01T23:59:59.000Z

    Variable temperature electrochemical strain microscopy has been used to study the electrochemical activity of Sm-doped ceria as a function of temperature and bias. The electrochemical strain microscopy hysteresis loops have been collected across the surface at different temperatures and the relative activity at different temperatures has been compared. The relaxation behavior of the signal at different temperatures has been also evaluated to relate kinetic process during bias induced electrochemical reactions with temperature and two different kinetic regimes have been identified. The strongly non-monotonic dependence of relaxation behavior on temperature is interpreted as evidence for water-mediated mechanisms.

  8. Monolith electroplating process

    DOE Patents [OSTI]

    Agarrwal, Rajev R. (1410 S. Busse Rd., 2K, Mt. Prospect, IL 60056)

    2001-01-01T23:59:59.000Z

    An electroplating process for preparing a monolith metal layer over a polycrystalline base metal and the plated monolith product. A monolith layer has a variable thickness of one crystal. The process is typically carried in molten salts electrolytes, such as the halide salts under an inert atmosphere at an elevated temperature, and over deposition time periods and film thickness sufficient to sinter and recrystallize completely the nucleating metal particles into one single crystal or crystals having very large grains. In the process, a close-packed film of submicron particle (20) is formed on a suitable substrate at an elevated temperature. The temperature has the significance of annealing particles as they are formed, and substrates on which the particles can populate are desirable. As the packed bed thickens, the submicron particles develop necks (21) and as they merge into each other shrinkage (22) occurs. Then as micropores also close (23) by surface tension, metal density is reached and the film consists of unstable metal grain (24) that at high enough temperature recrystallize (25) and recrystallized grains grow into an annealed single crystal over the electroplating time span. While cadmium was used in the experimental work, other soft metals may be used.

  9. UselessVariable Elimination Olin Shivers

    E-Print Network [OSTI]

    Shivers, Olin

    flow analysis on the CPS inter­ mediate form. (I use a CPS representation essentially identical­passing style (CPS) intermediate representations, continuation variables are frequently passed around loops

  10. Continuously-Variable Series-Elastic Actuator

    E-Print Network [OSTI]

    Mooney, Luke M.

    Actuator efficiency is an important factor in the design of powered leg prostheses, orthoses, exoskeletons, and legged robots. A continuously-variable series-elastic actuator (CV-SEA) is presented as an efficient actuator ...

  11. Utility Variable Generation Integration Group Fall Technical...

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

    15, 2014 9:00AM CDT to October 17, 2014 3:00PM CDT The Utility Variable Generation Integration Group (UVIG) Fall Technical Workshop in San Antonio, Texas will provide attendees...

  12. Variable volume architecture : expanding the boundary

    E-Print Network [OSTI]

    Saheba, Asheshh (Asheshh Mohit), 1972-

    2001-01-01T23:59:59.000Z

    Research into the creation of a Variable Volume Architecture is explored through a series of proposals and projects. An argument is established to develop the means and methods of achieving an architecture of transformation. ...

  13. The Cloud Computing and Other Variables

    E-Print Network [OSTI]

    Borjon-Kubota, Martha Estela

    2011-01-01T23:59:59.000Z

    12. Fragments in Six 13. Cloud Computing 14. Phase 15.Note 48. Devoured vi Cloud Computing and other Variables I.moment. Lasts hours. Cloud Computing Just there Over the

  14. Ashtekar's New Variables and Positive Energy

    E-Print Network [OSTI]

    James M. Nester; Roh-Suan Tung; Yuan Zhong Zhang

    1994-01-07T23:59:59.000Z

    We discuss earlier unsuccessful attempts to formulate a positive gravitational energy proof in terms of the New Variables of Ashtekar. We also point out the difficulties of a Witten spinor type proof. We then use the special orthonormal frame gauge conditions to obtain a locally positive expression for the New Variables Hamiltonian and thereby a ``localization'' of gravitational energy as well as a positive energy proof.

  15. HVAC's Variable Refrigerant Flow (VRF) Technology

    E-Print Network [OSTI]

    Jones, S.

    2012-01-01T23:59:59.000Z

    1 Comfort by Design Steve Jones Commercial Sales Manager for Mitsubishi Southwest Business Unit HVAC?s Variable Refrigerant Flow (VRF) Technology HVAC Industry Overview HVAC Market Dollar Volume $18 Billion Source:;NABH Research... Moveable Ductless 5 VRF Technology Overview 6 What is VRF Technology? Variable Refrigerant Flow More Comfort, Less Energy Usage 8 INVERTER-driven Compressor Time R oo m T em pe ra tur e ? Enables capacity operation as low as 4% ? Sizing...

  16. GEOCHEMICAL MODELING OF F AREA SEEPAGE BASIN COMPOSITION AND VARIABILITY

    SciTech Connect (OSTI)

    Millings, M.; Denham, M.; Looney, B.

    2012-05-08T23:59:59.000Z

    From the 1950s through 1989, the F Area Seepage Basins at the Savannah River Site (SRS) received low level radioactive wastes resulting from processing nuclear materials. Discharges of process wastes to the F Area Seepage Basins followed by subsequent mixing processes within the basins and eventual infiltration into the subsurface resulted in contamination of the underlying vadose zone and downgradient groundwater. For simulating contaminant behavior and subsurface transport, a quantitative understanding of the interrelated discharge-mixing-infiltration system along with the resulting chemistry of fluids entering the subsurface is needed. An example of this need emerged as the F Area Seepage Basins was selected as a key case study demonstration site for the Advanced Simulation Capability for Environmental Management (ASCEM) Program. This modeling evaluation explored the importance of the wide variability in bulk wastewater chemistry as it propagated through the basins. The results are intended to generally improve and refine the conceptualization of infiltration of chemical wastes from seepage basins receiving variable waste streams and to specifically support the ASCEM case study model for the F Area Seepage Basins. Specific goals of this work included: (1) develop a technically-based 'charge-balanced' nominal source term chemistry for water infiltrating into the subsurface during basin operations, (2) estimate the nature of short term and long term variability in infiltrating water to support scenario development for uncertainty quantification (i.e., UQ analysis), (3) identify key geochemical factors that control overall basin water chemistry and the projected variability/stability, and (4) link wastewater chemistry to the subsurface based on monitoring well data. Results from this study provide data and understanding that can be used in further modeling efforts of the F Area groundwater plume. As identified in this study, key geochemical factors affecting basin chemistry and variability included: (1) the nature or chemistry of the waste streams, (2) the open system of the basins, and (3) duration of discharge of the waste stream types. Mixing models of the archetype waste streams indicated that the overall basin system would likely remain acidic much of the time. Only an extended periods of predominantly alkaline waste discharge (e.g., >70% alkaline waste) would dramatically alter the average pH of wastewater entering the basins. Short term and long term variability were evaluated by performing multiple stepwise modeling runs to calculate the oscillation of bulk chemistry in the basins in response to short term variations in waste stream chemistry. Short term (1/2 month and 1 month) oscillations in the waste stream types only affected the chemistry in Basin 1; little variation was observed in Basin 2 and 3. As the largest basin, Basin 3 is considered the primary source to the groundwater. Modeling showed that the fluctuation in chemistry of the waste streams is not directly representative of the source term to the groundwater (i.e. Basin 3). The sequence of receiving basins and the large volume of water in Basin 3 'smooth' or nullify the short term variability in waste stream composition. As part of this study, a technically-based 'charge-balanced' nominal source term chemistry was developed for Basin 3 for a narrow range of pH (2.7 to 3.4). An example is also provided of how these data could be used to quantify uncertainty over the long term variations in waste stream chemistry and hence, Basin 3 chemistry.

  17. Guide to transverse projections and mass-constraining variables

    SciTech Connect (OSTI)

    Barr, A. J. [Department of Physics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH (United Kingdom); Khoo, T. J.; Lester, C. G. [Department of Physics, Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE (United Kingdom); Konar, P. [Theoretical Physics Group, Physical Research Laboratory, Ahmedabad, Gujarat - 380 009 (India); Kong, K. [Department of Physics and Astronomy, University of Kansas, Lawrence, KA 66045 (United States); Matchev, K. T.; Park, M. [Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)

    2011-11-01T23:59:59.000Z

    This paper seeks to demonstrate that many of the existing mass-measurement variables proposed for hadron colliders (m{sub T}, m{sub eff}, m{sub T2}, missing p-vector{sub T}, h{sub T}, {radical}(s-circumflex){sub min}, etc.) are far more closely related to each other than is widely appreciated, and indeed can all be viewed as a common mass-bound specialized for a variety of purposes. A consequence of this is that one may understand better the strengths and weaknesses of each variable, and the circumstances in which each can be used to best effect. In order to achieve this, we find it necessary first to revisit the seemingly empty and infertile wilderness populated by the subscript 'T' (as in 'pe{sub T}') in order to remind ourselves what this process of transversification actually means. We note that, far from being simple, transversification can mean quite different things to different people. Those readers who manage to battle through the barrage of transverse notation distinguishing 'T' from 'v' or or from 'o', and 'early projection' from 'late projection', will find their efforts rewarded towards the end of the paper with (i) a better understanding of how collider mass variables fit together, (ii) an appreciation of how these variables could be generalized to search for things more complicated than supersymmetry, (iii) will depart with an aversion to thoughtless or naieve use of the so-called 'transverse methods' of any of the popular computer Lorentz-vector libraries, and (iv) will take care in their subsequent papers to be explicit about which of the 61 identified variants of the 'transverse mass' they are employing.

  18. Comparative clustering analysis of variable stars in the Hipparcos, OGLE Large Magellanic Cloud and CoRoT exoplanet databases

    E-Print Network [OSTI]

    Sarro, L M; Aerts, C; López, M

    2009-01-01T23:59:59.000Z

    Context. Discovery of new variability classes in large surveys using multivariate statistics techniques such as clustering, relies heavily on the correct understanding of the distribution of known classes as point processes in parameter space. Aims. Our objective is to analyze the correspondence between the classical stellar variability types and the clusters found in the distribution of light curve parameters and colour indices of stars in the CoRoT exoplanet sample. The final aim is to help in the identification on new types of variability by first identifying the well known variables in the CoRoT sample. Methods. We apply unsupervised classification algorithms to identify clusters of variable stars from modes of the probability density distribution. We use reference variability databases (Hipparcos and OGLE) as a framework to calibrate the clustering methodology. Furthermore, we use the results from supervised classification methods to interpret the resulting clusters. Results.We interpret the clusters in ...

  19. A PARANETRIC STlJDY OF THE ELECTROSLAG WELDING PROCESS

    E-Print Network [OSTI]

    Eagar, Thomas W.

    ) ) A PARANETRIC STlJDY OF THE ELECTROSLAG WELDING PROCESS by W. S. Ricci and T. W. Eagar conducted on electroslag welds to statistically evaluate the effect of i ndependent process variables upon dependent process responses consisting of heat affected zone size, dilution, form factor, welding speed

  20. Cloud speed impact on solar variability scaling â?? Application to the wavelet variability model

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan

    2013-01-01T23:59:59.000Z

    Kleissl, J. , 2013. Deriving cloud velocity from an array ofCloud Speed Impact on Solar Variability Scaling -this work, we determine from cloud speeds. Cloud simulator

  1. Production-Intent Lost-Motion Variable Valve Actuation Systems...

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

    Production-Intent Lost-Motion Variable Valve Actuation Systems Production-Intent Lost-Motion Variable Valve Actuation Systems Variable valve actuation with onoff IEGR pre-bump is...

  2. Interannual variability of Caribbean rainfall, ENSO and the Atlantic Ocean

    E-Print Network [OSTI]

    Columbia University

    Interannual variability of Caribbean rainfall, ENSO and the Atlantic Ocean Alessandra Giannini variability of Caribbean-Central Americanrainfall are examined. The atmosphericcirculation over this region- ature (SST) variability associated with Caribbean rainfall, as selected by canonical correlation

  3. Purification process

    SciTech Connect (OSTI)

    Marshall, A.

    1981-02-17T23:59:59.000Z

    A process for the removal of hydrogen sulphide from gases or liquid hydrocarbons, comprises contacting the gas or liquid hydrocarbon with an aqueous alkaline solution, preferably having a pH value of 8 to 10, comprising (A) an anthraquinone disulphonic acid or a water-soluble sulphonamide thereof (B) a compound of a metal which can exist in at least two valency states and (C) a sequestering agent.

  4. Sources of Technical Variability in Quantitative LC-MS Proteomics: Human Brain Tissue Sample Analysis.

    SciTech Connect (OSTI)

    Piehowski, Paul D.; Petyuk, Vladislav A.; Orton, Daniel J.; Xie, Fang; Moore, Ronald J.; Ramirez Restrepo, Manuel; Engel, Anzhelika; Lieberman, Andrew P.; Albin, Roger L.; Camp, David G.; Smith, Richard D.; Myers, Amanda J.

    2013-05-03T23:59:59.000Z

    To design a robust quantitative proteomics study, an understanding of both the inherent heterogeneity of the biological samples being studied as well as the technical variability of the proteomics methods and platform is needed. Additionally, accurately identifying the technical steps associated with the largest variability would provide valuable information for the improvement and design of future processing pipelines. We present an experimental strategy that allows for a detailed examination of the variability of the quantitative LC-MS proteomics measurements. By replicating analyses at different stages of processing, various technical components can be estimated and their individual contribution to technical variability can be dissected. This design can be easily adapted to other quantitative proteomics pipelines. Herein, we applied this methodology to our label-free workflow for the processing of human brain tissue. For this application, the pipeline was divided into four critical components: Tissue dissection and homogenization (extraction), protein denaturation followed by trypsin digestion and SPE clean-up (digestion), short-term run-to-run instrumental response fluctuation (instrumental variance), and long-term drift of the quantitative response of the LC-MS/MS platform over the 2 week period of continuous analysis (instrumental stability). From this analysis, we found the following contributions to variability: extraction (72%) >> instrumental variance (16%) > instrumental stability (8.4%) > digestion (3.1%). Furthermore, the stability of the platform and its’ suitability for discovery proteomics studies is demonstrated.

  5. Hydropyrolysis process

    DOE Patents [OSTI]

    Ullman, Alan Z. (Northridge, CA); Silverman, Jacob (Woodland Hills, CA); Friedman, Joseph (Huntington Beach, CA)

    1986-01-01T23:59:59.000Z

    An improved process for producing a methane-enriched gas wherein a hydrogen-deficient carbonaceous material is treated with a hydrogen-containing pyrolysis gas at an elevated temperature and pressure to produce a product gas mixture including methane, carbon monoxide and hydrogen. The improvement comprises passing the product gas mixture sequentially through a water-gas shift reaction zone and a gas separation zone to provide separate gas streams of methane and of a recycle gas comprising hydrogen, carbon monoxide and methane for recycle to the process. A controlled amount of steam also is provided which when combined with the recycle gas provides a pyrolysis gas for treatment of additional hydrogen-deficient carbonaceous material. The amount of steam used and the conditions within the water-gas shift reaction zone and gas separation zone are controlled to obtain a steady-state composition of pyrolysis gas which will comprise hydrogen as the principal constituent and a minor amount of carbon monoxide, steam and methane so that no external source of hydrogen is needed to supply the hydrogen requirements of the process. In accordance with a particularly preferred embodiment, conditions are controlled such that there also is produced a significant quantity of benzene as a valuable coproduct.

  6. Generalized covariation and extended Fukushima decompositions for Banach valued processes.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Generalized covariation and extended Fukushima decompositions for Banach valued processes corresponding results when B = C([-, 0]) and X = X(·). This will consitute a significant Fukushima decomposition random variables, Malliavin calculus, Generalized Fukushima decomposition. LUISS Guido Carli - Libera

  7. Kepler and the long-period variables

    SciTech Connect (OSTI)

    Hartig, Erich; Lebzelter, Thomas [University of Vienna, Department of Astrophysics, Türkenschanzstrasse 17, A-1180 Vienna (Austria); Cash, Jennifer [Department of Biological and Physical Sciences, South Carolina State University, P.O. Box 7024, Orangeburg, SC 29117 (United States); Hinkle, Kenneth H.; Mighell, Kenneth J. [National Optical Astronomy Observatories, P.O. Box 26732, Tucson, AZ 85726 (United States); Walter, Donald K., E-mail: erich.hartig@univie.ac.at, E-mail: thomas.lebzelter@univie.ac.at, E-mail: jcash@physics.scsu.edu, E-mail: hinkle@noao.edu, E-mail: mighell@noao.edu, E-mail: dkw@physics.scsu.edu [Department of Biological and Physical Sciences, South Carolina State University, P.O. Box 7296, Orangeburg, SC 29117 (United States)

    2014-12-01T23:59:59.000Z

    High-precision Kepler photometry is used to explore the details of asymptotic giant branch (AGB) light curves. Since AGB variability has a typical timescale on the order of a year, we discuss at length the removal of long-term trends and quarterly changes in Kepler data. Photometry for a small sample of nine semi-regular (SR) AGB stars is examined using a 30 minute cadence over a period of 45 months. While undergoing long-period variations of many magnitudes, the light curves are shown to be smooth at the millimagnitude level over much shorter time intervals. No flares or other rapid events were detected on a sub-day timescale. The shortest AGB period detected is on the order of 100 days. All the SR variables in our sample are shown to have multiple modes. This is always the first overtone, typically combined with the fundamental. A second common characteristic of SR variables is shown to be the simultaneous excitation of multiple closely separated periods for the same overtone mode. Approximately half the sample had a much longer variation in the light curve, likely a long secondary period (LSP). The light curves were all well represented by a combination of sinusoids. However, the properties of the sinusoids are time variable, with irregular variations present at low levels. No non-radial pulsations were detected. It is argued that the LSP variation seen in many SR variables is intrinsic to the star and linked to multiple mode pulsation.

  8. MASe UCRL-15037 CONTINUOUSLY VARIABLE TRANSMISSIONS: THEORY AND...

    Office of Scientific and Technical Information (OSTI)

    transmission when operating in the power recirculation mode 20 Simple manual system to control the speed ratio of a variable V-belt continuously variable transmission 21 Schematic...

  9. Impact of subgrid-scale radiative heating variability on the...

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

    subgrid-scale radiative heating variability on the stratocumulus-to-trade cumulus transition in climate models. Impact of subgrid-scale radiative heating variability on the...

  10. AUTOMATIC VARIABLE VENTILATION CONTROL SYSTEMS BASED ON AIR QUALITY DETECTION

    E-Print Network [OSTI]

    Turiel, Isaac

    2011-01-01T23:59:59.000Z

    saon Automatic Variable Ventilation Control Systems Based onL Kusuda, "Control Ventilation to Conserve Energy While t·79-3 Automatic variable ventilation control systems based on

  11. Enabling High Efficiency Clean Combustion with Micro-Variable...

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

    Combustion with Micro-Variable Circular-Orifice (MVCO) Fuel Injector and Adaptive PCCI Enabling High Efficiency Clean Combustion with Micro-Variable Circular-Orifice (MVCO) Fuel...

  12. Sources of Technical Variability in Quantitative LC-MS Proteomics...

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

    Sources of Technical Variability in Quantitative LC-MS Proteomics: Human Brain Tissue Sample Analysis. Sources of Technical Variability in Quantitative LC-MS Proteomics: Human...

  13. Microstructural Response of Variably Hydrated Ca-Rich Montmorillonite...

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

    Microstructural Response of Variably Hydrated Ca-Rich Montmorillonite to Supercritical CO2. Microstructural Response of Variably Hydrated Ca-Rich Montmorillonite to Supercritical...

  14. Residential Cold Climate Heat Pump with Variable-Speed Technology...

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

    Cold Climate Heat Pump with Variable-Speed Technology Residential Cold Climate Heat Pump with Variable-Speed Technology Purdue prototype system Purdue prototype system Unico...

  15. Compact, electro-hydraulic, variable valve actuation system providing...

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

    Compact, electro-hydraulic, variable valve actuation system providing variable lift, timing and duration to enable high efficiency engine combustion control Compact,...

  16. Ocean color and atmospheric dimethyl sulfide: On their mesoscale variability

    E-Print Network [OSTI]

    Matrai, Patricia A; Balch, William M; Cooper, David J; Saltzman, Eric S

    1993-01-01T23:59:59.000Z

    periods of' time, covering mesoscale Campbell, J. W. and W.Dimethyl Sulfide' On Their Mesoscale Variability PATRICIA A.Miami, Miami, Florida The mesoscale variability of dimethyl

  17. Variable Speed Pumping: A Guide to Successful Applications -...

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

    Variable Speed Pumping: A Guide to Successful Applications - Executive Summary Variable Speed Pumping: A Guide to Successful Applications - Executive Summary This document...

  18. Adaptation to Climate Variability and Change: A Guidance Manual...

    Open Energy Info (EERE)

    to Climate Variability and Change: A Guidance Manual for Development Planning Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Adaptation to Climate Variability and...

  19. Demonstration of a Variable Phase Turbine Power System for Low...

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

    Demonstration of a Variable Phase Turbine Power System for Low Temperature Geothermal Resources Demonstration of a Variable Phase Turbine Power System for Low Temperature...

  20. Simultaneous Design, Scheduling and Operation Through Process Integration

    E-Print Network [OSTI]

    Al-Mutairi, Eid M.

    2009-05-15T23:59:59.000Z

    to environment Variables product tp C , Unit selling price of product p during period t d Design variable t,i u F Flowrate for the i u th input to the process unit ti v F , Mixed flow rate to EMUs t,j u G Flowrate for the j u th output... Composition of material q in output stream j u th q,w Z Composition of the q th pollutant in the w th waste stream product tp C , Unit selling price of product p during period t Binary variables E i,j,m Binary variable for existence of a match...

  1. Processing data base information having nonwhite noise

    DOE Patents [OSTI]

    Gross, Kenneth C. (Bolingbrook, IL); Morreale, Patricia (Park Ridge, IL)

    1995-01-01T23:59:59.000Z

    A method and system for processing a set of data from an industrial process and/or a sensor. The method and system can include processing data from either real or calculated data related to an industrial process variable. One of the data sets can be an artificial signal data set generated by an autoregressive moving average technique. After obtaining two data sets associated with one physical variable, a difference function data set is obtained by determining the arithmetic difference between the two pairs of data sets over time. A frequency domain transformation is made of the difference function data set to obtain Fourier modes describing a composite function data set. A residual function data set is obtained by subtracting the composite function data set from the difference function data set and the residual function data set (free of nonwhite noise) is analyzed by a statistical probability ratio test to provide a validated data base.

  2. Measuring spatial variability in soil characteristics

    DOE Patents [OSTI]

    Hoskinson, Reed L. (Rigby, ID); Svoboda, John M. (Idaho Falls, ID); Sawyer, J. Wayne (Hampton, VA); Hess, John R. (Ashton, ID); Hess, J. Richard (Idaho Falls, ID)

    2002-01-01T23:59:59.000Z

    The present invention provides systems and methods for measuring a load force associated with pulling a farm implement through soil that is used to generate a spatially variable map that represents the spatial variability of the physical characteristics of the soil. An instrumented hitch pin configured to measure a load force is provided that measures the load force generated by a farm implement when the farm implement is connected with a tractor and pulled through or across soil. Each time a load force is measured, a global positioning system identifies the location of the measurement. This data is stored and analyzed to generate a spatially variable map of the soil. This map is representative of the physical characteristics of the soil, which are inferred from the magnitude of the load force.

  3. Variable energy constant current accelerator structure

    DOE Patents [OSTI]

    Anderson, O.A.

    1988-07-13T23:59:59.000Z

    A variable energy, constant current ion beam accelerator structure is disclosed comprising an ion source capable of providing the desired ions, a pre-accelerator for establishing an initial energy level, a matching/pumping module having means for focusing means for maintaining the beam current, and at least one main accelerator module for continuing beam focus, with means capable of variably imparting acceleration to the beam so that a constant beam output current is maintained independent of the variable output energy. In a preferred embodiment, quadrupole electrodes are provided in both the matching/pumping module and the one or more accelerator modules, and are formed using four opposing cylinder electrodes which extend parallel to the beam axis and are spaced around the beam at 90/degree/ intervals with opposing electrodes maintained at the same potential. 12 figs., 3 tabs.

  4. Pearle's Hidden-Variable Model Revisited

    E-Print Network [OSTI]

    Richard D. Gill

    2015-05-19T23:59:59.000Z

    Pearle (1970) gave an example of a local hidden variables model which exactly reproduced the singlet correlations of quantum theory, through the device of data-rejection: particles can fail to be detected in a way which depends on the hidden variables carried by the particles and on the measurement settings. If the experimenter computes correlations between measurement outcomes of particle pairs for which both particles are detected, he is actually looking at a subsample of particle pairs, determined by interaction involving both measurement settings and the hidden variables carried in the particles. We correct a mistake in Pearle's formulas (a normalization error) and more importantly show that the model is more simple than first appears. We illustrate with visualisations of the model and with a small simulation experiment, with code in the statistical programming language R included in the paper. Open problems are discussed.

  5. Reforming process

    SciTech Connect (OSTI)

    Buss, W.C.

    1987-02-24T23:59:59.000Z

    A reforming process is described comprising: (a) contacting a hydrocarbon feed with a first reforming catalyst at conditions which favor reforming to form a product stream. The first reforming catalyst is bifunctional and comprises a metallic oxide support which contains acidic sites having disposed therein a Group VIII metal; and (b) contacting the product stream with a second reforming catalyst at conditions which favor reforming. The second reforming catalyst is a monofunctional, non-acidic catalyst comprising a large-pore zeolite containing at least one Group VIII metal.

  6. Proposal Process

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible forPortsmouth/Paducah47,193.70 HgPromising Magnesium BatteryProposal Process Network

  7. Variable pressure power cycle and control system

    DOE Patents [OSTI]

    Goldsberry, Fred L. (Spring, TX)

    1984-11-27T23:59:59.000Z

    A variable pressure power cycle and control system that is adjustable to a variable heat source is disclosed. The power cycle adjusts itself to the heat source so that a minimal temperature difference is maintained between the heat source fluid and the power cycle working fluid, thereby substantially matching the thermodynamic envelope of the power cycle to the thermodynamic envelope of the heat source. Adjustments are made by sensing the inlet temperature of the heat source fluid and then setting a superheated vapor temperature and pressure to achieve a minimum temperature difference between the heat source fluid and the working fluid.

  8. A new variable in flow analysis

    E-Print Network [OSTI]

    Q. H. Zhang; L. Huo; W. N. Zhang

    2006-06-20T23:59:59.000Z

    We have used a simple spectrum distribution which was derived from a hydrodynamical equation\\cite{Csorgo} to fit the data of the STAR group. It is found that it can fit the $v_2$ of STAR group very well. We have found that $v_2$ is sensitive to both the effective temperature of particles and the expanding velocity. We have suggested a new variable ${\\bf z}$ to be used in the flow analysis. This new variable will measure the correlation of particles momentum components. We have also shown that one of the $x$ or $y$ direction in the reaction plane is the direction which has the largest variance.

  9. ULTRACAM photometry of eclipsing cataclysmic variable stars

    E-Print Network [OSTI]

    William James Feline

    2008-06-04T23:59:59.000Z

    The accurate determination of the masses of cataclysmic variable stars is critical to our understanding of their origin, evolution and behaviour. Observations of cataclysmic variables also afford an excellent opportunity to constrain theoretical physical models of the accretion discs housed in these systems. In particular, the brightness distributions of the accretion discs of eclipsing systems can be mapped at a spatial resolution unachievable in any other astrophysical situation. This thesis addresses both of these important topics via the analysis of the light curves of six eclipsing dwarf novae, obtained using ULTRACAM, a novel high-speed imaging photometer.

  10. Integrating Variable Renewable Energy: Challenges and Solutions

    SciTech Connect (OSTI)

    Bird, L.; Milligan, M.; Lew, D.

    2013-09-01T23:59:59.000Z

    In the U.S., a number of utilities are adopting higher penetrations of renewables, driven in part by state policies. While power systems have been designed to handle the variable nature of loads, the additional supply-side variability and uncertainty can pose new challenges for utilities and system operators. However, a variety of operational and technical solutions exist to help integrate higher penetrations of wind and solar generation. This paper explores renewable energy integration challenges and mitigation strategies that have been implemented in the U.S. and internationally, including forecasting, demand response, flexible generation, larger balancing areas or balancing area cooperation, and operational practices such as fast scheduling and dispatch.

  11. Planning with Numeric Variables in Multiobjective Antonio Garrido1 and Derek Long 2

    E-Print Network [OSTI]

    Garrido, Antonio

    process generates a relaxed plan according to the estimations of the first stage, and then performs search is 1, thus increasing the complexity of the second stage. The third stage performs the searchPlanning with Numeric Variables in Multiobjective Planning Antonio Garrido1 and Derek Long 2

  12. Planning with Numeric Variables in Multiobjective Antonio Garrido 1 and Derek Long 2

    E-Print Network [OSTI]

    Garrido, Antonio

    process generates a relaxed plan according to the estimations of the first stage, and then performs search is 1, thus increasing the complexity of the second stage. The third stage performs the searchPlanning with Numeric Variables in Multiobjective Planning Antonio Garrido 1 and Derek Long 2

  13. Eddy Heat Flux in the Southern Ocean: Response to Variable Wind Forcing ANDREW MCC. HOGG

    E-Print Network [OSTI]

    Miami, University of

    Eddy Heat Flux in the Southern Ocean: Response to Variable Wind Forcing ANDREW MCC. HOGG Australian processes. The authors also test the model response to long-term changes in wind forcing, including steadily1925.1 © 2008 American Meteorological Society #12;Given the dominant role of wind forcing in the South

  14. Research papers Temporal and spatial variability in fall storm induced sediment resuspension

    E-Print Network [OSTI]

    Research papers Temporal and spatial variability in fall storm induced sediment resuspension February 2011 Received in revised form 20 July 2012 Accepted 3 August 2012 Keywords: Sediment resuspension a b s t r a c t Storm-driven sediment resuspension is an episodic process that is an important

  15. Towards Managing Variability in the Safety Design of an Automotive Hall Effect Sensor

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Towards Managing Variability in the Safety Design of an Automotive Hall Effect Sensor Dimitri Van) as the main devel- opment process for an automotive Hall Effect sensor. This versatile component is integrated for every automotive application in which the sensor is to be used. In addition, no support is given

  16. Measure Guideline: Replacing Single-Speed Pool Pumps with Variable Speed Pumps for Energy Savings

    SciTech Connect (OSTI)

    Hunt, A.; Easley, S.

    2012-05-01T23:59:59.000Z

    The report evaluates potential energy savings by replacing traditional single-speed pool pumps with variable speed pool pumps, and provide a basic cost comparison between continued uses of traditional pumps verses new pumps. A simple step-by-step process for inspecting the pool area and installing a new pool pump follows.

  17. Fractal states in quantum information processing

    E-Print Network [OSTI]

    Gregg Jaeger

    2007-08-01T23:59:59.000Z

    The fractal character of some quantum properties has been shown for systems described by continuous variables. Here, a definition of quantum fractal states is given that suits the discrete systems used in quantum information processing, including quantum coding and quantum computing. Several important examples are provided.

  18. Processteknikens grunder ("PTG") Introduction to Process Engineering

    E-Print Network [OSTI]

    Zevenhoven, Ron

    of a calculation makes sense and is possible. for example: 0 reactor mass calculations; Equations, variables and units Ã?bo Akademi University | Thermal and Flow Engineering | 20500 Turku | Finland #12;9/28 Process calculations /1 Engineering calculations often start with balance

  19. Oligomerization process

    DOE Patents [OSTI]

    Smith, Jr., Lawrence A. (Bellaire, TX); hearn, Dennis (Houston, TX); Jones, Jr., Edward M. (Friendswood, TX)

    1991-01-01T23:59:59.000Z

    A liquid phase process for oligomerization of C.sub.4 and C.sub.5 isoolefins or the etherification thereof with C.sub.1 to C.sub.6 alcohols wherein the reactants are contacted in a reactor with a fixed bed acid cation exchange resin catalyst at an LHSV of 5 to 20, pressure of 0 to 400 psig and temperature of 120 to 300.degree. F. wherein the improvement is the operation of the reactor at a pressure to maintain the reaction mixture at its boiling point whereby at least a portion but less than all of the reaction mixture is vaporized. By operating at the boiling point and allowing a portion of the reaction mixture to vaporize, the exothermic heat of reaction is dissipated by the formation of more boil up and the temperature in the reactor is controlled.

  20. Etherification process

    DOE Patents [OSTI]

    Smith, Jr., Lawrence A. (Houston, TX); Hearn, Dennis (Houston, TX); Jones, Jr., Edward M. (Friendswood, TX)

    1990-01-01T23:59:59.000Z

    A liquid phase process for oligomerization of C.sub.4 and C.sub.5 isoolefins or the etherification thereof with C.sub.1 to C.sub.6 alcohols wherein the reactants are contacted in a reactor with a fixed bed acid cation exchange resin catalyst at an LHSV of 5 to 20, pressure of 0 to 400 psig and temperature of 120.degree. to 300.degree. F. wherein the improvement is the operation of the reactor at a pressure to maintain the reaction mixture at its boiling point whereby at least a portion but less than all of the reaction mixture is vaporized. By operating at the boiling point and allowing a portion of the reaction mixture to vaporize, the exothermic heat of reaction is dissipated by the formation of more boil up and the temperature in the reactor is controlled.

  1. Etherification process

    DOE Patents [OSTI]

    Smith, L.A. Jr.; Hearn, D.; Jones, E.M. Jr.

    1990-08-21T23:59:59.000Z

    A liquid phase process is described for oligomerization of C[sub 4] and C[sub 5] isoolefins or the etherification thereof with C[sub 1] to C[sub 6] alcohols wherein the reactants are contacted in a reactor with a fixed bed acid cation exchange resin catalyst at an LHSV of 5 to 20, pressure of 0 to 400 psig and temperature of 120 to 300 F wherein the improvement is the operation of the reactor at a pressure to maintain the reaction mixture at its boiling point whereby at least a portion but less than all of the reaction mixture is vaporized. By operating at the boiling point and allowing a portion of the reaction mixture to vaporize, the exothermic heat of reaction is dissipated by the formation of more boil up and the temperature in the reactor is controlled. 2 figs.

  2. Oligomerization process

    DOE Patents [OSTI]

    Smith, L.A. Jr.; Hearn, D.; Jones, E.M. Jr.

    1991-03-26T23:59:59.000Z

    A liquid phase process is described for oligomerization of C[sub 4] and C[sub 5] isoolefins or the etherification thereof with C[sub 1] to C[sub 6] alcohols wherein the reactants are contacted in a reactor with a fixed bed acid cation exchange resin catalyst at an LHSV of 5 to 20, pressure of 0 to 400 psig and temperature of 120 to 300 F wherein the improvement is the operation of the reactor at a pressure to maintain the reaction mixture at its boiling point whereby at least a portion but less than all of the reaction mixture is vaporized. By operating at the boiling point and allowing a portion of the reaction mixture to vaporize, the exothermic heat of reaction is dissipated by the formation of more boil up and the temperature in the reactor is controlled. 2 figures.

  3. Markovian feedback to control continuous variable entanglement

    E-Print Network [OSTI]

    Stefano Mancini

    2005-04-18T23:59:59.000Z

    We present a model to realize quantum feedback control of continuous variable entanglement. It consists of two interacting bosonic modes subject to amplitude damping and achieving entangled Gaussian steady state. The possibility to greatly improve the degree of entanglement by means of Markovian (direct) feedback is then shown.

  4. Original article Variability of digestibility criteria

    E-Print Network [OSTI]

    Boyer, Edmond

    Original article Variability of digestibility criteria in maize elite hybrids submitted of various in vitro digestibility criteria used to estimate genotypic variation in silage maize elite hybrids and in vitro digestibility of whole-plant and cell-walls were pre- dicted by near infra-red reflectance

  5. Solitary waves propagating over variable Roger Grimshaw

    E-Print Network [OSTI]

    Solitary waves propagating over variable topography Roger Grimshaw Loughborough University waves that can propagate steadily over long distances. They were first observed by Russell in 1837 in a now famous report [26] on his observations of a solitary wave propagating along a Scottish canal

  6. Climate Change and Variability Lake Ice, Fishes

    E-Print Network [OSTI]

    Sheridan, Jennifer

    #12;Climate Change and Variability Lake Ice, Fishes and Water Levels John J. Magnuson Center to everything else." #12;The Invisible Present The Invisible Place Magnuson 2006 #12;Ice-on Day 2007 Peter W. Schmitz Photo Local Lake Mendota #12;Ice Breakup 2010 Lake Mendota March 20 #12;March 21 Ice Breakup 2010

  7. Gowdy phenomenology in scale-invariant variables

    E-Print Network [OSTI]

    Lars Andersson; Henk van Elst; Claes Uggla

    2003-10-30T23:59:59.000Z

    The dynamics of Gowdy vacuum spacetimes is considered in terms of Hubble-normalized scale-invariant variables, using the timelike area temporal gauge. The resulting state space formulation provides for a simple mechanism for the formation of ``false'' and ``true spikes'' in the approach to the singularity, and a geometrical formulation for the local attractor.

  8. Hydrologically Sensitive Areas: Variable Source Area Hydrology

    E-Print Network [OSTI]

    Walter, M.Todd

    Hydrologically Sensitive Areas: Variable Source Area Hydrology Implications for Water Quality Risk hydrology was developed and applied to the New York City (NYC) water supply watersheds. According and are therefore hydrologically sensitive with respect to their potential to transport contaminants to perennial

  9. 3. Hydrogeomorphic Variability and River Restoration

    E-Print Network [OSTI]

    Montgomery, David R.

    . It is difficult to design effective stream and channel restoration measures, or evaluate project performance expansion of efforts in and expenditures for stream restoration. Increasingly, resto- ration efforts focus39 3. Hydrogeomorphic Variability and River Restoration D. R. MONTGOMERY1 AND S. M. BOLTON2

  10. Chapter 18: Variable Frequency Drive Evaluation Protocol

    SciTech Connect (OSTI)

    Romberger, J.

    2014-11-01T23:59:59.000Z

    An adjustable-speed drive (ASD) includes all devices that vary the speed of a rotating load, including those that vary the motor speed and linkage devices that allow constant motor speed while varying the load speed. The Variable Frequency Drive Evaluation Protocol presented here addresses evaluation issues for variable-frequency drives (VFDs) installed on commercial and industrial motor-driven centrifugal fans and pumps for which torque varies with speed. Constant torque load applications, such as those for positive displacement pumps, are not covered by this protocol. Other ASD devices, such as magnetic drive, eddy current drives, variable belt sheave drives, or direct current motor variable voltage drives, are also not addressed. The VFD is by far the most common type of ASD hardware. With VFD speed control on a centrifugal fan or pump motor, energy use follows the affinity laws, which state that the motor electricity demand is a cubic relationship to speed under ideal conditions. Therefore, if the motor runs at 75% speed, the motor demand will ideally be reduced to 42% of full load power; however, with other losses it is about 49% of full load power.

  11. Variable Light-Cone Theory of Gravity

    E-Print Network [OSTI]

    I. T. Drummond

    1999-08-20T23:59:59.000Z

    We show how to reformulate Variable Speed of Light Theories (VSLT) in a covariant fashion as Variable Light-Cone Theories (VLCT) by introducing two vierbein bundles each associated with a distinct metric. The basic gravitational action relates to one bundle while matter propagates relative to the other in a conventional way. The variability of the speed of light is represented by the variability of the matter light-cone relative to the gravitational light-cone. The two bundles are related locally by an element M, of SL(4,R). The dynamics of the field M is that of a SL(4,R)-sigma model gauged with respect to local (orthochronous) Lorentz transformations on each of the bundles. Only the ``massless'' version of the model with a single new coupling, F, that has the same dimensions as Newton's constant $G_N$, is considered in this paper. When F vanishes the theory reduces to standard General Relativity. We verify that the modified Bianchi identities of the model are consistent with the standard conservation law for the matter energy-momentum tensor in its own background metric. The implications of the model for some simple applications are examined, the Newtonian limit, the flat FRW universe and the spherically symmetric static solution.

  12. The Variable Selection Problem Edward I. George

    E-Print Network [OSTI]

    George, Edward I.

    The Variable Selection Problem Edward I. George Journal of the American Statistical Association-1459%28200012%2995%3A452%3C1304%3ATVSP%3E2.0.CO%3B2-1 Journal of the American Statistical Association is currently published by American Statistical Association. Your use of the JSTOR archive indicates your acceptance

  13. Exploiting Variable Stiffness in Explosive Movement Tasks

    E-Print Network [OSTI]

    Vijayakumar, Sethu

    robots. The proposed methodology is applied to a ball- throwing task where we demonstrate that: (i, with the motivation of (i) improving safety of robots and humans (by providing an intrinsic compliance) [26], (iiExploiting Variable Stiffness in Explosive Movement Tasks David J. Braun, Matthew Howard and Sethu

  14. Variability in the super-Earth 55 Cnc e

    E-Print Network [OSTI]

    Demory, Brice-Olivier; Madhusudhan, Nikku; Queloz, Didier

    2015-01-01T23:59:59.000Z

    Considerable progress has been made in recent years in observations of atmospheric signatures of giant exoplanets, but processes in rocky exoplanets remain largely unknown due to major challenges in observing small planets. Numerous efforts to observe spectra of super-Earths, exoplanets with masses of 1-10 Earth masses, have thus far revealed only featureless spectra. In this paper we report a 4-$\\sigma$ detection of variability in the dayside thermal emission from the transiting super-Earth 55 Cancri e. Dedicated space-based monitoring of the planet in the mid-infrared over eight eclipses revealed the thermal emission from its dayside atmosphere varying by a factor 3.7 between 2012 and 2013. The amplitude and trend of the variability are not explained by potential influence of star spots or by local thermal or compositional changes in the atmosphere over the short span of the observations. The possibility of large scale surface activity due to strong tidal interactions possibly similar to Io, or the presence...

  15. Thermodynamics in variable speed of light theories

    E-Print Network [OSTI]

    Juan Racker; Pablo Sisterna; Hector Vucetich

    2009-11-30T23:59:59.000Z

    The perfect fluid in the context of a covariant variable speed of light theory proposed by J. Magueijo is studied. On the one hand the modified first law of thermodynamics together with a recipe to obtain equations of state are obtained. On the other hand the Newtonian limit is performed to obtain the nonrelativistic hydrostatic equilibrium equation for the theory. The results obtained are used to determine the time variation of the radius of Mercury induced by the variability of the speed of light ($c$), and the scalar contribution to the luminosity of white dwarfs. Using a bound for the change of that radius and combining it with an upper limit for the variation of the fine structure constant, a bound on the time variation of $c$ is set. An independent bound is obtained from luminosity estimates for Stein 2015B.

  16. Review of Variable Generation Integration Charges

    SciTech Connect (OSTI)

    Porter, K.; Fink, S.; Buckley, M.; Rogers, J.; Hodge, B. M.

    2013-03-01T23:59:59.000Z

    The growth of wind and solar generation in the United States, and the expectation of continued growth of these technologies, dictates that the future power system will be operated in a somewhat different manner because of increased variability and uncertainty. A small number of balancing authorities have attempted to determine an 'integration cost' to account for these changes to their current operating practices. Some balancing authorities directly charge wind and solar generators for integration charges, whereas others add integration charges to projected costs of wind and solar in integrated resource plans or in competitive solicitations for generation. This report reviews the balancing authorities that have calculated variable generation integration charges and broadly compares and contrasts the methodologies they used to determine their specific integration charges. The report also profiles each balancing authority and how they derived wind and solar integration charges.

  17. Continuous-variable private quantum channel

    SciTech Connect (OSTI)

    Bradler, Kamil [Instituto de Fisica, UNAM, Apdo. Postal 20-364, Mexico DF 01000 (Mexico); Department of Optics, Palacky University, 17. listopadu 50, 77200 Olomouc (Czech Republic)

    2005-10-15T23:59:59.000Z

    In this paper we introduce the concept of quantum private channel within the continuous variables framework (CVPQC) and investigate its properties. In terms of CVPQC we naturally define a 'maximally' mixed state in phase space together with its explicit construction and show that for increasing number of encryption operations (which sets the length of a shared key between Alice and Bob) the encrypted state is arbitrarily close to the maximally mixed state in the sense of the Hilbert-Schmidt distance. We bring the exact solution for the distance dependence and give also a rough estimate of the necessary number of bits of the shared secret key (i.e., how much classical resources are needed for an approximate encryption of a generally unknown continuous-variable state). The definition of the CVPQC is analyzed from the Holevo bound point of view which determines an upper bound of information about an incoming state an eavesdropper is able to get from his optimal measurement.

  18. Variable metric methods for automatic history matching

    E-Print Network [OSTI]

    Armasu, Razvan

    1985-01-01T23:59:59.000Z

    . Automatic history matching codes presently in use employ steepest descent with optimal control, and although they were proven superior to others, their performance is not entirely satisfactory due to the poor rate of convergence as the performance index... rates of convergence when compared to the steepest descent They can be made to start out as steepest descent and end up as a second order algorithm, using functional and gradient information only, In this work several variable metric algorithms...

  19. Thermoacoustic tomography with variable sound speed

    E-Print Network [OSTI]

    Stefanov, Plamen

    2009-01-01T23:59:59.000Z

    We study the mathematical model of thermoacoustic tomography in media with a variable speed for a fixed time interval, greater than the diameter of the domain. In case of measurements on the whole boundary, we give an explicit solution in terms of a Neumann series expansion. We give necessary and sufficient conditions for uniqueness and stability when the measurements are taken on a part of the boundary.

  20. Thermoacoustic tomography with variable sound speed

    E-Print Network [OSTI]

    Plamen Stefanov; Gunther Uhlmann

    2009-05-30T23:59:59.000Z

    We study the mathematical model of thermoacoustic tomography in media with a variable speed for a fixed time interval, greater than the diameter of the domain. In case of measurements on the whole boundary, we give an explicit solution in terms of a Neumann series expansion. We give necessary and sufficient conditions for uniqueness and stability when the measurements are taken on a part of the boundary.

  1. Energy Savings of Variable Speed Motors

    E-Print Network [OSTI]

    Fishel, F. D.

    1979-01-01T23:59:59.000Z

    pump) The input horsepower from the electrical system can be calculated using Equation (3). static head + frictional head + control valve Input HP = ::"\\;;=~..l... motor, conduit, and wire. Motors in the 25-350 HP range are best suited to VFD Systems. As the cost of energy increases and the relative cost savings of variable speed systems increase, the application of these systems should be more widespread. 281...

  2. Intensive Variables & Nanostructuring in Magnetostructural Materials

    SciTech Connect (OSTI)

    Lewis, Laura

    2014-08-13T23:59:59.000Z

    Over the course of this project, fundamental inquiry was carried out to investigate, understand and predict the effects of intensive variables, including the structural scale, on magnetostructural phase transitions in the model system of equiatomic FeRh. These transitions comprise simultaneous magnetic and structural phase changes that have their origins in very strong orbital-lattice coupling and thus may be driven by a plurality of effects.

  3. Exploring chaos to model the design process

    E-Print Network [OSTI]

    Sharkawy, Ahmed

    1990-01-01T23:59:59.000Z

    of design as a sequence of three rational processes (14) 10 Jansson's tsvo space model (15) 4 The different types of constraints within the design process The major processes occuring in Jansson's concept space. 19 6 Figure 6a depicts the skeleton upon... model and how it fits within March's depiction 9 Reduced two variable model and how it fits within Jansson's scheme . . 45 10 Map of case: 3=2. 0, /=50, d=0. 15 47 11 Map of case: %=2. 2, y=50, d=0. 15 48 12 Map of' case: 4=2. 6, @=50, d=0. 15 49...

  4. Exploring chaos to model the design process 

    E-Print Network [OSTI]

    Sharkawy, Ahmed

    1990-01-01T23:59:59.000Z

    of design as a sequence of three rational processes (14) 10 Jansson's tsvo space model (15) 4 The different types of constraints within the design process The major processes occuring in Jansson's concept space. 19 6 Figure 6a depicts the skeleton upon... model and how it fits within March's depiction 9 Reduced two variable model and how it fits within Jansson's scheme . . 45 10 Map of case: 3=2. 0, /=50, d=0. 15 47 11 Map of case: %=2. 2, y=50, d=0. 15 48 12 Map of' case: 4=2. 6, @=50, d=0. 15 49...

  5. Variable energy constant current accelerator structure

    DOE Patents [OSTI]

    Anderson, Oscar A. (Berkeley, CA)

    1990-01-01T23:59:59.000Z

    A variable energy, constant current ion beam accelerator structure is disclosed comprising an ion source capable of providing the desired ions, a pre-accelerator for establishing an initial energy level, a matching/pumping module having means for focusing means for maintaining the beam current, and at least one main accelerator module for continuing beam focus, with means capable of variably imparting acceleration to the beam so that a constant beam output current is maintained independent of the variable output energy. In a preferred embodiment, quadrupole electrodes are provided in both the matching/pumping module and the one or more accelerator modules, and are formed using four opposing cylinder electrodes which extend parallel to the beam axis and are spaced around the beam at 90.degree. intervals with opposing electrodes maintained at the same potential. Adjacent cylinder electrodes of the quadrupole structure are maintained at different potentials to thereby reshape the cross section of the charged particle beam to an ellipse in cross section at the mid point along each quadrupole electrode unit in the accelerator modules. The beam is maintained in focus by alternating the major axis of the ellipse along the x and y axis respectively at adjacent quadrupoles. In another embodiment, electrostatic ring electrodes may be utilized instead of the quadrupole electrodes.

  6. Statistical Approaches to Fault Analysis in Multivariate Process Control

    E-Print Network [OSTI]

    Ungar, Lyle H.

    Statistical Approaches to Fault Analysis in Multivariate Process Control Richard D. De Veaux Lyle H Abstract After a brief review of some statistical approaches to multivariate process control, we present analysis or partial least squares to limit the number of latent variables to study. While using historical

  7. Diffusion theory The mean and variance function for discrete processes

    E-Print Network [OSTI]

    Tufto, Jarle

    and = var(St). It is well known that this approximation is remarkably good, even for moderate values of t that are continuous in the state variable as well as in time. The properties of such processes will be completely, which means that the form of the distribution of the St has practically no effect on the process Xt

  8. Variability in continuous traffic monitoring data

    SciTech Connect (OSTI)

    Wright, T.; Hu, P.S. [Oak Ridge National Lab., TN (United States); Young, J. [Tennessee Univ., Knoxville, TN (United States)

    1996-07-01T23:59:59.000Z

    Each state in the United States can be viewed as a universe of road segments. For each road segment in each state, it is desired to know various traffic characteristics based on count data, classification count data, and weigh-in-motion data. These data are absolutely essential for highway design, maintenance, safety, and planning. Given no cost constraints, each road segment would be continuously monitored every day of the year. However, in practice, a few road segments are monitored continuously every day of the year to produce annual characteristics of traffic flow. The remaining road segments are monitored for one or two days each year, and this resulting data are `adjusted` (using factors based on data collected from the continuously monitored road segments) to produce estimates of annual characteristics. With this general approach, each state strives to provide estimates of annual characteristics for each road segment within its jurisdiction. In 1985, the Federal Highway Administration (FHWA) published the Traffic Monitoring Guide to assist states in achieving this end. As with almost any data collection effort, the monitoring data suffers from errors from many sources. In this paper, we report some empirical findings in a research project sponsored by the FHWA. This research project studied the variability in the traffic data from the continuously monitored road segments from state(s) and, the extent to which this variability is transferred to and affects the precision of the data produced from the road segments which are monitored only one or two days each year. The ultimate hope is that states will eventually be able to not only publish an estimate of a characteristic such as Average Annual Daily Traffic (AADT) for each road segment, but also that each estimate will be accompanied by a statement expressing how good the estimate is in terms of its estimated variability or precision, which will likely be expressed as a coefficient of variation.

  9. Allocating Variability and Reserve Requirements (Presentation)

    SciTech Connect (OSTI)

    Kirby, B.; King, J.; Milligan, M.

    2011-10-01T23:59:59.000Z

    This presentation describes how you could conceivably allocate variability and reserve requirements, including how to allocate aggregation benefits. Conclusions of this presentation are: (1) Aggregation provides benefits because individual requirements are not 100% correlated; (2) Method needed to allocate reduced requirement among participants; (3) Differences between allocation results are subtle - (a) Not immediately obvious which method is 'better'; (b) Many are numerically 'correct', they sum to the physical requirement; (c) Many are not 'fair', Results depend on sub-aggregation and/or the order individuals are included; and (4) Vector allocation method is simple and fair.

  10. Adhesive bonding using variable frequency microwave energy

    DOE Patents [OSTI]

    Lauf, Robert J. (Oak Ridge, TN); McMillan, April D. (Knoxville, TN); Paulauskas, Felix L. (Oak Ridge, TN); Fathi, Zakaryae (Cary, NC); Wei, Jianghua (Raleigh, NC)

    1998-01-01T23:59:59.000Z

    Methods of facilitating the adhesive bonding of various components with variable frequency microwave energy are disclosed. The time required to cure a polymeric adhesive is decreased by placing components to be bonded via the adhesive in a microwave heating apparatus having a multimode cavity and irradiated with microwaves of varying frequencies. Methods of uniformly heating various articles having conductive fibers disposed therein are provided. Microwave energy may be selectively oriented to enter an edge portion of an article having conductive fibers therein. An edge portion of an article having conductive fibers therein may be selectively shielded from microwave energy.

  11. Crystal diffraction lens with variable focal length

    DOE Patents [OSTI]

    Smither, R.K.

    1991-04-02T23:59:59.000Z

    A method and apparatus for altering the focal length of a focusing element of one of a plurality of pre-determined focal lengths by changing heat transfer within selected portions of the element by controlled quantities is disclosed. Control over heat transfer is accomplished by manipulating one or more of a number of variables, including: the amount of heat or cold applied to surfaces; type of fluids pumped through channels for heating and cooling; temperatures, directions of flow and rates of flow of fluids; and placement of channels. 19 figures.

  12. Long-Term Wind Power Variability

    SciTech Connect (OSTI)

    Wan, Y. H.

    2012-01-01T23:59:59.000Z

    The National Renewable Energy Laboratory started collecting wind power data from large commercial wind power plants (WPPs) in southwest Minnesota with dedicated dataloggers and communication links in the spring of 2000. Over the years, additional WPPs in other areas were added to and removed from the data collection effort. The longest data stream of actual wind plant output is more than 10 years. The resulting data have been used to analyze wind power fluctuations, frequency distribution of changes, the effects of spatial diversity, and wind power ancillary services. This report uses the multi-year wind power data to examine long-term wind power variability.

  13. Adhesive bonding using variable frequency microwave energy

    DOE Patents [OSTI]

    Lauf, R.J.; McMillan, A.D.; Paulauskas, F.L.; Fathi, Z.; Wei, J.

    1998-09-08T23:59:59.000Z

    Methods of facilitating the adhesive bonding of various components with variable frequency microwave energy are disclosed. The time required to cure a polymeric adhesive is decreased by placing components to be bonded via the adhesive in a microwave heating apparatus having a multimode cavity and irradiated with microwaves of varying frequencies. Methods of uniformly heating various articles having conductive fibers disposed therein are provided. Microwave energy may be selectively oriented to enter an edge portion of an article having conductive fibers therein. An edge portion of an article having conductive fibers therein may be selectively shielded from microwave energy. 26 figs.

  14. Adhesive bonding using variable frequency microwave energy

    DOE Patents [OSTI]

    Lauf, R.J.; McMillan, A.D.; Paulauskas, F.L.; Fathi, Z.; Wei, J.

    1998-08-25T23:59:59.000Z

    Methods of facilitating the adhesive bonding of various components with variable frequency microwave energy are disclosed. The time required to cure a polymeric adhesive is decreased by placing components to be bonded via the adhesive in a microwave heating apparatus having a multimode cavity and irradiated with microwaves of varying frequencies. Methods of uniformly heating various articles having conductive fibers disposed therein are provided. Microwave energy may be selectively oriented to enter an edge portion of an article having conductive fibers therein. An edge portion of an article having conductive fibers therein may be selectively shielded from microwave energy. 26 figs.

  15. Role of Smarter Grids in Variable Renewable Resource Integration (Presentation)

    SciTech Connect (OSTI)

    Miller, M.

    2012-07-01T23:59:59.000Z

    This presentation discusses the role of smarter grids in variable renewable resource integration and references material from a forthcoming ISGAN issue paper: Smart Grid Contributions to Variable Renewable Resource Integration, co-written by the presenter and currently in review.

  16. HYDROLOGICAL PROCESSES Hydrol. Process. 21, 24472457 (2007)

    E-Print Network [OSTI]

    Reitsma, Femke E.

    2007-01-01T23:59:59.000Z

    HYDROLOGICAL PROCESSES Hydrol. Process. 21, 2447­2457 (2007) Published online 18 May 2007 in Wiley for simulating watershed runoff. This data model, called nen, allows users to visualize and analyse the processes, such as raster, that do not give direct insight into the spatial dynamics and distribution of the processes

  17. Extensible packet processing architecture

    DOE Patents [OSTI]

    Robertson, Perry J.; Hamlet, Jason R.; Pierson, Lyndon G.; Olsberg, Ronald R.; Chun, Guy D.

    2013-08-20T23:59:59.000Z

    A technique for distributed packet processing includes sequentially passing packets associated with packet flows between a plurality of processing engines along a flow through data bus linking the plurality of processing engines in series. At least one packet within a given packet flow is marked by a given processing engine to signify by the given processing engine to the other processing engines that the given processing engine has claimed the given packet flow for processing. A processing function is applied to each of the packet flows within the processing engines and the processed packets are output on a time-shared, arbitered data bus coupled to the plurality of processing engines.

  18. Jose Groh (Geneva Observatory, Switzerland) Luminous Blue Variables

    E-Print Network [OSTI]

    Crowther, Paul

    Jose Groh (Geneva Observatory, Switzerland) Luminous Blue Variables: massive stars extremely close Groh - Luminous BlueVariables: massive stars extremely close to the Eddington limit JD2:Very massive Jose Groh - Luminous BlueVariables: massive stars extremely close to the Eddington limit JD2:Very

  19. Variable ventilation induces endogenous surfactant release in normal guinea pigs

    E-Print Network [OSTI]

    Lutchen, Kenneth

    Variable ventilation induces endogenous surfactant release in normal guinea pigs Stephen P. Arold,1. Alencar, Kenneth R. Lutchen, and Edward P. Ingenito. Variable ventilation induces endogenous surfactant.00036.2003.--Variable or noisy ventilation, which includes random breath-to-breath variations in tidal

  20. Interannual variability of Caribbean rainfall, ENSO and the Atlantic Ocean

    E-Print Network [OSTI]

    Columbia University

    Interannual variability of Caribbean rainfall, ENSO and the Atlantic Ocean Alessandra Giannini the interannual variability of Caribbean­Central American rainfall are examined. The atmospheric circulation over) and sea surface temper­ ature (SST) variability associated with Caribbean rainfall, as selected

  1. GLOBAL PATTERN OF MESOSCALE VARIABILITY IN SEA SURFACE HEIGHT

    E-Print Network [OSTI]

    Kaplan, Alexey

    GLOBAL PATTERN OF MESOSCALE VARIABILITY IN SEA SURFACE HEIGHT AND ITS DYNAMICAL CAUSES Alexey separate the mesoscale variability of sea surface heights into its spatial and temporal components of mesoscale variability in different areas to dynamical causes. Major portion of it can be explained

  2. Variably insulating portable heater/cooler

    DOE Patents [OSTI]

    Potter, Thomas F. (Denver, CO)

    1998-01-01T23:59:59.000Z

    A compact vacuum insulation panel comprising a chamber enclosed by two sheets of metal, glass-like spaces disposed in the chamber between the sidewalls, and a high-grade vacuum in the chamber includes apparatus and methods for enabling and disabling, or turning "on" and "off" the thermal insulating capability of the panel. One type of enabling and disabling apparatus and method includes a metal hydride for releasing hydrogen gas into the chamber in response to heat, and a hydrogen grate between the metal hydride and the chamber for selectively preventing and allowing return of the hydrogen gas to the metal hydride. Another type of enabling and disabling apparatus and method includes a variable emissivity coating on the sheets of metal in which the emissivity is controllably variable by heat or electricity. Still another type of enabling and disabling apparatus and method includes metal-to-metal contact devices that can be actuated to establish or break metal-to-metal heat paths or thermal short circuits between the metal sidewalls.

  3. Variably insulating portable heater/cooler

    DOE Patents [OSTI]

    Potter, T.F.

    1998-09-29T23:59:59.000Z

    A compact vacuum insulation panel is described comprising a chamber enclosed by two sheets of metal, glass-like spaces disposed in the chamber between the sidewalls, and a high-grade vacuum in the chamber includes apparatus and methods for enabling and disabling, or turning ``on`` and ``off`` the thermal insulating capability of the panel. One type of enabling and disabling apparatus and method includes a metal hydride for releasing hydrogen gas into the chamber in response to heat, and a hydrogen grate between the metal hydride and the chamber for selectively preventing and allowing return of the hydrogen gas to the metal hydride. Another type of enabling and disabling apparatus and method includes a variable emissivity coating on the sheets of metal in which the emissivity is controllably variable by heat or electricity. Still another type of enabling and disabling apparatus and method includes metal-to-metal contact devices that can be actuated to establish or break metal-to-metal heat paths or thermal short circuits between the metal sidewalls. 25 figs.

  4. Variable temperature seat climate control system

    DOE Patents [OSTI]

    Karunasiri, Tissa R. (Van Nuys, CA); Gallup, David F. (Pasadena, CA); Noles, David R. (Glendale, CA); Gregory, Christian T. (Alhambra, CA)

    1997-05-06T23:59:59.000Z

    A temperature climate control system comprises a variable temperature seat, at least one heat pump, at least one heat pump temperature sensor, and a controller. Each heat pump comprises a number of Peltier thermoelectric modules for temperature conditioning the air in a main heat exchanger and a main exchanger fan for passing the conditioned air from the main exchanger to the variable temperature seat. The Peltier modules and each main fan may be manually adjusted via a control switch or a control signal. Additionally, the temperature climate control system may comprise a number of additional temperature sensors to monitor the temperature of the ambient air surrounding the occupant as well as the temperature of the conditioned air directed to the occupant. The controller is configured to automatically regulate the operation of the Peltier modules and/or each main fan according to a temperature climate control logic designed both to maximize occupant comfort during normal operation, and minimize possible equipment damage, occupant discomfort, or occupant injury in the event of a heat pump malfunction.

  5. WECC Variable Generation Planning Reference Book: Appendices

    SciTech Connect (OSTI)

    Makarov, Yuri V.; Du, Pengwei; Etingov, Pavel V.; Ma, Jian; Vyakaranam, Bharat

    2013-05-13T23:59:59.000Z

    The document titled “WECC Variable Generation Planning Reference Book”. This book is divided into two volumes; one is the main document (volume 1)and the other is appendices (volume 2). The main document is a collection of the best practices and the information regarding the application and impact of variables generation on power system planning. This volume (appendices) has additional information on the following topics: Probabilistic load flow problems. 2. Additional useful indices. 3. high-impact low-frequency (HILF) events. 4. Examples of wide-area nomograms. 5. Transmission line ratings, types of dynamic rating methods. 6. Relative costs per MW-km of different electric power transmission technologies. 7. Ultra-high voltage (UHV) transmission. 8.High voltage direct current (VSC-HVDC). 9. HVDC. 10. Rewiring of existing transmission lines. 11. High-temperature low sag (HTLS) conductors. 12. The direct method and energy functions for transient stability analysis in power systems. 13.Blackouts caused by voltage instability. 14. Algorithm for parameter continuation predictor-corrector methods. 15. Approximation techniques available for security regions. 16. Impacts of wind power on power system small signals stability. 17. FIDVR. 18. FACTS. 19. European planning standard and practices. 20. International experience in wind and solar energy sources. 21. Western Renewable Energy Zones (WREZ). 22. various energy storage technologies. 23. demand response. 24. BA consolidation and cooperation options. 25. generator power management requirements and 26. European planning guidelines.

  6. IS ACTIVE REGION CORE VARIABILITY AGE DEPENDENT?

    SciTech Connect (OSTI)

    Ugarte-Urra, Ignacio [College of Science, George Mason University, 4400 University Drive, Fairfax, VA 22030 (United States); Warren, Harry P. [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States)

    2012-12-10T23:59:59.000Z

    The presence of both steady and transient loops in active region cores has been reported from soft X-ray and extreme-ultraviolet observations of the solar corona. The relationship between the different loop populations, however, remains an open question. We present an investigation of the short-term variability of loops in the core of two active regions in the context of their long-term evolution. We take advantage of the nearly full Sun observations of STEREO and Solar Dynamics Observatory spacecraft to track these active regions as they rotate around the Sun multiple times. We then diagnose the variability of the active region cores at several instances of their lifetime using EIS/Hinode spectral capabilities. We inspect a broad range of temperatures, including for the first time spatially and temporally resolved images of Ca XIV and Ca XV lines. We find that the active region cores become fainter and steadier with time. The significant emission measure at high temperatures that is not correlated with a comparable increase at low temperatures suggests that high-frequency heating is viable. The presence, however, during the early stages, of an enhanced emission measure in the ''hot'' (3.0-4.5 MK) and ''cool'' (0.6-0.9 MK) components suggests that low-frequency heating also plays a significant role. Our results explain why there have been recent studies supporting both heating scenarios.

  7. Feed Variability and Bulk Vitrification Glass Performance Assessment

    SciTech Connect (OSTI)

    Mahoney, Lenna A.; Vienna, John D.

    2005-01-10T23:59:59.000Z

    The supplemental treatment (ST) bulk vitrification process will obtain its feed, consisting of low-activity waste (LAW), from more than one source. One purpose of this letter report is to describe the compositional variability of the feed to ST. The other is to support the M-62-08 decision by providing a preliminary assessment of the effectiveness of bulk vitrification (BV), the process that has been selected to perform supplemental treatment, in handling the ST feed envelope. Roughly nine-tenths of the ST LAW feed will come from the Waste Treatment Plant (WTP) pretreatment. This processed waste is expected to combine (1) a portion of the same LAW feed sent to the WTP melters and (2) a dilute stream that is the product of the condensate from the submerged-bed scrubber (SBS) and the drainage from the electrostatic precipitator (WESP), both of which are part of the LAW off-gas system. The manner in which the off-gas-product stream is concentrated to reduce its volume, and the way in which the excess LAW and off-gas product streams are combined, are part of the interface between WTP and ST and have not been determined. This letter report considers only one possible arrangement, in which half of the total LAW is added to the off-gas product stream, giving an estimated ST feed stream from WTP. (Total LAW equals that portion of LAW sent to the WTP LAW vitrification plant (WTP LAW) plus the LAW not currently treatable in the LAW vitrification plant due to capacity limitations (excess)).

  8. Nonlinear Latent Variable Models for Video Sequences

    E-Print Network [OSTI]

    rahimi, ali

    2005-06-06T23:59:59.000Z

    Many high-dimensional time-varying signals can be modeled as a sequence of noisy nonlinear observations of a low-dimensional dynamical process. Given high-dimensional observations and a distribution describing the ...

  9. Managing variability to improve quality, capacity and cost in the perioperative process at Massachusetts General Hospital

    E-Print Network [OSTI]

    Price, Devon J. (Devon Jameson)

    2011-01-01T23:59:59.000Z

    The widely held assumption is that to improve access and quality of health care, we need to spend more. In fact, that is not necessarily true. The results of this project, performed at Massachusetts General Hospital (MGH), ...

  10. A study of the effect of process variables on forward combustion oil recovery

    E-Print Network [OSTI]

    Berry, Holland James

    1966-01-01T23:59:59.000Z

    five-well field experiment in southern Oklahoma. In this experiment, the API 0 gravity of the produced crude oil increased by as much as 2 API. A reduction in oil viscosity of 4, 200 cp from the original value of 0 5, 000 cp at 66 F resulted. A... Initial API Percent Oil Sat. , Water Sat. , Gas Sat. , Porosity, @ 60oF Cla %% PV %%ua PV % PV %% BV 3 4 5 6 7 8 9 10 11 Talco Field, Texas Hawkin s Field, T exa s Hawkins Field, Texas Talco Field, Texas Midway-Sunset Field, Calif. Midway...

  11. Processes affecting the spatial and temporal variability of methane in a temperate dammed river system

    E-Print Network [OSTI]

    Bilsley, Nicole A.

    2012-01-01T23:59:59.000Z

    emissions from large dams as renewable energy resources: Areservoir (Brazil’s Tucuruí Dam) and the energy policyemissions from hydroelectric dams: controversies provide a

  12. Level of processing and list structure as moderating variables in context-dependent recognition

    E-Print Network [OSTI]

    Vela, Eddie

    1987-01-01T23:59:59.000Z

    for target information. It is equally important to note, however, that environmental potentiation does not guarantee an instantiation of increased memory performance with environmental reinstatement. Environmental p t ti ti i i t d d to de t ii th p t ti... is posited to be effective in prompting recall and recognition only if it was encoded with target information at the time of learning. An important point, however, is what this positon does not posit. Consistent with the notion of environmental...

  13. Experimental studies on remanence acquisition processes and regional geomagnetic field variability from archeointensity studies

    E-Print Network [OSTI]

    Mitra, Ritayan

    2012-01-01T23:59:59.000Z

    ties of naturally occurring goethite. Geophys. J. R. Astron.for the relative amount of goethite/hematite as compared toremanence in these specimens. Goethite which although has a

  14. Energy Materials & Processes | EMSL

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

    Energy Materials & Processes Overview Atmospheric Aerosol Systems Biosystem Dynamics & Design Energy Materials & Processes Terrestrial & Subsurface Ecosystems Energy Materials &...

  15. Diffusion processes in general relativistic radiating spheres

    SciTech Connect (OSTI)

    Barreto, W.; Herrera, L.; Santos, N.O. (Oriente Universidad, Cumana (Venezuela); Universidad Central de Venezuela, Caracas; Observatorio Nacional do Brasil, Rio de Janeiro (Brazil))

    1989-09-01T23:59:59.000Z

    The influence of diffusion processes on the dynamics of general relativistic radiating spheres is systematically studied by means of two examples. Differences between the streaming-out limit and the diffusion limit are exhibited, for both models, through the evolution curves of dynamical variables. In particular it is shown the Bondi mass decreases, for both models, in the diffusion limit as compared with its value at the streaming-out regime. 15 refs.

  16. What measures climate? A variety of variables including their variability and extreme values determine climate for

    E-Print Network [OSTI]

    Allan, Richard P.

    climate zones? The sun is the ultimate power source for the climate "machine". The uneven distribution conditions. Typical variables to consider are temperature (maximum, miniumum), precipitation (includes rain, sleet, snow, hail, etc), sunlight/cloudiness, wind, humidity, ice cover, sea temperature, etc... Many

  17. Integrating Software Process Reuse and Automation Emmanuelle Rouill, Benot Combemale, Olivier Barais, David Touzet and Jean-Marc Jzquel

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Integrating Software Process Reuse and Automation Emmanuelle Rouillé, Benoît Combemale, Olivier that captures their commonalities and variabilities) and automating their execution is a way to reduce is to automate the execution of a process whose variability is only partially resolved (i.e., a value is not set

  18. Improvements of the Variable Thermal Resistance

    E-Print Network [OSTI]

    Székely, V; Kollar, E

    2008-01-01T23:59:59.000Z

    A flat mounting unit with electronically variable thermal resistance [1] has been presented in the last year [2]. The design was based on a Peltier cell and the appropriate control electronics and software. The device is devoted especially to the thermal characterization of packages, e.g. in dual cold plate arrangements. Although this design meets the requirements of the static measurement we are intended to improve its parameters as the settling time and dynamic thermal impedance and the range of realized thermal resistance. The new design applies the heat flux sensor developed by our team as well [3], making easier the control of the device. This development allows even the realization of negative thermal resistances.

  19. Improvements of the Variable Thermal Resistance

    E-Print Network [OSTI]

    V. Szekely; S. Torok; E. Kollar

    2008-01-07T23:59:59.000Z

    A flat mounting unit with electronically variable thermal resistance [1] has been presented in the last year [2]. The design was based on a Peltier cell and the appropriate control electronics and software. The device is devoted especially to the thermal characterization of packages, e.g. in dual cold plate arrangements. Although this design meets the requirements of the static measurement we are intended to improve its parameters as the settling time and dynamic thermal impedance and the range of realized thermal resistance. The new design applies the heat flux sensor developed by our team as well [3], making easier the control of the device. This development allows even the realization of negative thermal resistances.

  20. Variable Interactions in Query-Driven Visualization

    SciTech Connect (OSTI)

    Bethel, E. Wes; Gosink, Luke J.; Anderson, John C.; Joy, Kenneth I.

    2007-10-25T23:59:59.000Z

    One fundamental element of scientific inquiry is discoveringrelationships, particularly the interactions between different variablesin observed or simulated phenomena. Building upon our prior work in thefield of Query-Driven Visualization, where visual data analysisprocessing is focused on subsets of large data deemed to be"scientifically interesting," this new work focuses on a novel knowledgediscovery capability suitable for use with petascale class datasets. Itenables visual presentation of the presence or absence of relationships(correlations) between variables in data subsets produced by Query-Drivenmethodologies. This technique holds great potential for enablingknowledge discovery from large and complex datasets currently emergingfrom SciDAC and INCITE projects. It is sufficiently generally to beapplicable to any time of complex, time-varying, multivariate data fromstructured, unstructured or adaptive grids.

  1. Continuous variable entanglement dynamics in structured reservoirs

    E-Print Network [OSTI]

    R. Vasile; S. Olivares; M. G. A. Paris; S. Maniscalco

    2009-10-13T23:59:59.000Z

    We address the evolution of entanglement in bimodal continuous variable quantum systems interacting with two independent structured reservoirs. We derive an analytic expression for the entanglement of formation without performing the Markov and the secular approximations and study in details the entanglement dynamics for various types of structured reservoirs and for different reservoir temperatures, assuming the two modes initially excited in a twin-beam state. Our analytic solution allows us to identify three dynamical regimes characterized by different behaviors of the entanglement: the entanglement sudden death, the non-Markovian revival and the non-secular revival regimes. Remarkably, we find that, contrarily to the Markovian case, the short-time system-reservoir correlations in some cases destroy quickly the initial entanglement even at zero temperature.

  2. Coal liquefaction process with enhanced process solvent

    DOE Patents [OSTI]

    Givens, Edwin N. (Bethlehem, PA); Kang, Dohee (Macungie, PA)

    1984-01-01T23:59:59.000Z

    In an improved coal liquefaction process, including a critical solvent deashing stage, high value product recovery is improved and enhanced process-derived solvent is provided by recycling second separator underflow in the critical solvent deashing stage to the coal slurry mix, for inclusion in the process solvent pool.

  3. Information processing by a controlled coupling process

    E-Print Network [OSTI]

    G. W. Wei; Shan Zhao

    2001-04-10T23:59:59.000Z

    This Letter proposes a controlled coupling process for information processing. The net effect of conventional coupling is isolated from the dynamical system and is analyzed in depth. The stability of the process is studied. We show that the proposed process can locally minimize the smoothness and the fidelity of dynamical data. A digital filter expression of the controlled coupling process is derived and the connection is made to the Hanning filter. The utility and robustness of proposed approach is demonstrated by both the restoration of the contaminated solution of the nonlinear Schr\\"{o}dinger equation and the estimation of the trend of a time series.

  4. VARIABILITY OF KD VALUES IN CEMENTITIOUS MATERIALS AND SEDIMENTS

    SciTech Connect (OSTI)

    Almond, P.; Kaplan, D.; Shine, E.

    2012-02-02T23:59:59.000Z

    Measured distribution coefficients (K{sub d} values) for environmental contaminants provide input data for performance assessments (PA) that evaluate physical and chemical phenomena for release of radionuclides from wasteforms, degradation of engineered components and subsequent transport of radionuclides through environmental media. Research efforts at SRNL to study the effects of formulation and curing variability on the physiochemical properties of the saltstone wasteform produced at the Saltstone Disposal Facility (SDF) are ongoing and provide information for the PA and Saltstone Operations. Furthermore, the range and distribution of plutonium K{sub d} values in soils is not known. Knowledge of these parameters is needed to provide guidance for stochastic modeling in the PA. Under the current SRS liquid waste processing system, supernate from F & H Tank Farm tanks is processed to remove actinides and fission products, resulting in a low-curie Decontaminated Salt Solution (DSS). At the Saltstone Production Facility (SPF), DSS is mixed with premix, comprised of blast furnace slag (BFS), Class F fly ash (FA), and portland cement (OPC) to form a grout mixture. The fresh grout is subsequently placed in SDF vaults where it cures through hydration reactions to produce saltstone, a hardened monolithic waste form. Variation in saltstone composition and cure conditions of grout can affect the saltstone's physiochemical properties. Variations in properties may originate from variables in DSS, premix, and water to premix ratio, grout mixing, placing, and curing conditions including time and temperature (Harbour et al. 2007; Harbour et al. 2009). There are no previous studies reported in the literature regarding the range and distribution of K{sub d} values in cementitious materials. Presently, the Savannah River Site (SRS) estimate ranges and distributions of K{sub d} values based on measurements of K{sub d} values made in sandy SRS sediments (Kaplan 2010). The actual cementitious material K{sub d} values and solubility values differ from the sandy sediments. The K{sub d} value range and distribution currently used in the PA are estimated to range between 0.25*K{sub d} and 1.75*K{sub d}, where the minimum and maximum values of the ranges reflect the 95% confidence level for the mean K{sub d} value (Kaplan 2010). The objective of the research with cementitious materials was to measure the range and distribution of a monovalent (Cs) and I{sup -} (anion), divalent (Sr), and trivalent (Eu) ions for a variety of laboratory-prepared saltstone surrogate samples to establish a K{sub d} range other than that which is presently used in the PA. It has been observed in laboratory samples that cure temperature profiles can affect properties such as heat of hydration, permeability, porosity, compressive strength, and set time (Harbour et al. 2009). The intent was to identify a range and distribution that could be used by stochastic modelers for the PA. Furthermore, the intent was to replace the arbitrarily selected distributions based on geological sandy sediments and to base it on actual cementitious materials. The scope of this study did not include understanding saltstone sorption mechanisms responsible for increasing or decreasing sorption. Similar to the work with cementitious materials, the purpose of the Pu sediment K{sub d} dataset was not to attempt to understand through statistics how to better understand Pu sorption to sediments or to lower Pu K{sub d} variance. The sediment Pu K{sub d} data is included in this study because it is a key risk driver for the PAs on the SRS, and there is presently no direct studies of Pu variability in SRS soils. Instead the distribution of Pu sediment K{sub d} values was assumed to be similar to other cations, as presented by Kaplan (2010).

  5. Device for adapting continuously variable transmissions to infinitely variable transmissions with forward-neutral-reverse capabilities

    DOE Patents [OSTI]

    Wilkes, Donald F. (Albuquerque, NM); Purvis, James W. (Albuquerque, NM); Miller, A. Keith (Albuquerque, NM)

    1997-01-01T23:59:59.000Z

    An infinitely variable transmission is capable of operating between a maximum speed in one direction and a minimum speed in an opposite direction, including a zero output angular velocity, while being supplied with energy at a constant angular velocity. Input energy is divided between a first power path carrying an orbital set of elements and a second path that includes a variable speed adjustment mechanism. The second power path also connects with the orbital set of elements in such a way as to vary the rate of angular rotation thereof. The combined effects of power from the first and second power paths are combined and delivered to an output element by the orbital element set. The transmission can be designed to operate over a preselected ratio of forward to reverse output speeds.

  6. Time variability of AGN and heating of cooling flows

    E-Print Network [OSTI]

    Carlo Nipoti; James Binney

    2005-05-03T23:59:59.000Z

    There is increasing evidence that AGN mechanical feedback is important in the energetics of cooling flows in galaxies and galaxy clusters. We investigate the implications of the variability of AGN mechanical luminosity L_m on observations of cooling flows and radio galaxies in general. It is natural to assume that l=ln(L_m/L_x) is a Gaussian process. Then L_m will be log-normally distributed at fixed cooling luminosity L_x, and the variance in a measure of L_m will increase with the time-resolution of the measure. We test the consistency of these predictions with existing data. These tests hinge on the power spectrum of l(t). Monitoring of Seyfert galaxies combined with estimates of the duty cycle of quasars imply flicker noise spectra, similar to those of microquasars. We combine a sample of sources in cooling flows that have cavities with the assumption that the average mechanical luminosity of the AGN equals L_x. Given that the mechanical luminosities are characterized by flicker noise, we find that their spectral amplitudes lie between the estimated amplitudes of quasars and the measured values for the radio luminosities of microquasars. The model together with the observation that powerful radio galaxies lie within a narrow range in optical luminosity, predicts the luminosity function of radio galaxies, in agreement with observations. Forthcoming radio surveys will test the prediction that the luminosity function turns over at about the smallest luminosities so far probed. [Abridged

  7. Estimating the age of alleles by use of intraallelic variability

    SciTech Connect (OSTI)

    Slatkin, M.; Rannala, B. [Univ of California, Berkeley, CA (United States)

    1997-02-01T23:59:59.000Z

    A method is presented for estimating the age of an allele by use of its frequency and the extent of variation among different copies. The method uses the joint distribution of the number of copies in a population sample and the coalescence times of the intraallelic gene genealogy conditioned on the number of copies. The linear birth-death process is used to approximate the dynamics of a rare allele in a finite population. A maximum-likelihood estimate of the age of the allele is obtained by Monte Carlo integration over the coalescence times. The method is applied to two alleles at the cystic fibrosis (CFTR) locus, {Delta}F508 and G542X, for which intraallelic variability at three intronic microsatellite loci has been examined. Our results indicate that G542X is somewhat older than {Delta}F508. Although absolute estimates depend on the mutation rates at the microsatellite loci, our results support the hypothesis that {Delta}F508 arose <500 generations ({approx}10,000 years) ago. 32 refs., 4 figs.

  8. Present and Future Modes of Low Frequency Climate Variability

    SciTech Connect (OSTI)

    Cane, Mark A.

    2014-02-20T23:59:59.000Z

    This project addressed area (1) of the FOA, “Interaction of Climate Change and Low Frequency Modes of Natural Climate Variability”. Our overarching objective is to detect, describe and understand the changes in low frequency variability between model simulations of the preindustrial climate and simulations of a doubled CO2 climate. The deliverables are a set of papers providing a dynamical characterization of interannual, decadal, and multidecadal variability in coupled models with attention to the changes in this low frequency variability between pre-industrial concentrations of greenhouse gases and a doubling of atmospheric concentrations of CO2. The principle mode of analysis, singular vector decomposition, is designed to advance our physical, mechanistic understanding. This study will include external natural variability due to solar and volcanic aerosol variations as well as variability internal to the climate system. An important byproduct is a set of analysis tools for estimating global singular vector structures from the archived output of model simulations.

  9. Linear rank inequalities on five or more variables

    E-Print Network [OSTI]

    Dougherty, Randall; Zeger, Kenneth

    2009-01-01T23:59:59.000Z

    Ranks of subspaces of vector spaces satisfy all linear inequalities satisfied by entropies (including the standard Shannon inequalities) and an additional inequality due to Ingleton. It is known that the Shannon and Ingleton inequalities generate all such linear rank inequalities on up to four variables, but it has been an open question whether additional inequalities hold for the case of five or more variables. Here we give a list of 24 inequalities which, together with the Shannon and Ingleton inequalities, generate all linear rank inequalities on five variables. We also give a partial list of linear rank inequalities on six variables and general results which produce such inequalities on an arbitrary number of variables; we prove that there are essentially new inequalities at each number of variables beyond four (a result also proved recently by Kinser).

  10. PRECISE HIGH-CADENCE TIME SERIES OBSERVATIONS OF FIVE VARIABLE YOUNG STARS IN AURIGA WITH MOST

    SciTech Connect (OSTI)

    Cody, Ann Marie; Tayar, Jamie; Hillenbrand, Lynne A. [Department of Astrophysics, California Institute of Technology, MC 249-17, Pasadena, CA 91125 (United States); Matthews, Jaymie M. [Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia V6T 1Z1 (Canada); Kallinger, Thomas, E-mail: amc@ipac.caltech.edu [Institut fuer Astronomie, Universitaet Wien, Tuerkenschanzstrasse 17, A-1180 Vienna (Austria)

    2013-03-15T23:59:59.000Z

    To explore young star variability on a large range of timescales, we have used the MOST satellite to obtain 24 days of continuous, sub-minute cadence, high-precision optical photometry on a field of classical and weak-lined T Tauri stars (TTSs) in the Taurus-Auriga star formation complex. Observations of AB Aurigae, SU Aurigae, V396 Aurigae, V397 Aurigae, and HD 31305 reveal brightness fluctuations at the 1%-10% level on timescales of hours to weeks. We have further assessed the variability properties with Fourier, wavelet, and autocorrelation techniques, identifying one significant period per star. We present spot models in an attempt to fit the periodicities, but find that we cannot fully account for the observed variability. Rather, all stars exhibit a mixture of periodic and aperiodic behavior, with the latter dominating stochastically on timescales less than several days. After removal of the main periodicity, periodograms for each light curve display power-law trends consistent with those seen for other young accreting stars. Several of our targets exhibited unusual variability patterns not anticipated by prior studies, and we propose that this behavior originates with the circumstellar disks. The MOST observations underscore the need for investigation of TTS light variations on a wide range of timescales in order to elucidate the physical processes responsible; we provide guidelines for future time series observations.

  11. STOCHASTIC VARIABILITY IN X-RAY EMISSION FROM THE BLACK HOLE BINARY GRS 1915+105

    SciTech Connect (OSTI)

    Polyakov, Yuriy S. [USPolyResearch, Ashland, PA 17921 (United States); Neilsen, Joseph [MIT Kavli Institute for Astrophysics and Space Research, Cambridge, MA 02139 (United States); Timashev, Serge F., E-mail: ypolyakov@uspolyresearch.com [Karpov Institute of Physical Chemistry, Moscow 103064 (Russian Federation)

    2012-06-15T23:59:59.000Z

    We examine stochastic variability in the dynamics of X-ray emission from the black hole system GRS 1915+105, a strongly variable microquasar commonly used for studying relativistic jets and the physics of black hole accretion. The analysis of sample observations for 13 different states in both soft (low) and hard (high) energy bands is performed by flicker-noise spectroscopy (FNS), a phenomenological time series analysis method operating on structure functions and power spectrum estimates. We find the values of FNS parameters, including the Hurst exponent, flicker-noise parameter, and characteristic timescales, for each observation based on multiple 2500 s continuous data segments. We identify four modes of stochastic variability driven by dissipative processes that may be related to viscosity fluctuations in the accretion disk around the black hole: random (RN), power-law (1F), one-scale (1S), and two-scale (2S). The variability modes are generally the same in soft and hard energy bands of the same observation. We discuss the potential for future FNS studies of accreting black holes.

  12. Radial Velocity Variability of Field Brown Dwarfs

    E-Print Network [OSTI]

    Prato, L; Rice, E L; McLean, I S; Kirkpatrick, J D; Burgasser, A J; Kim, S S

    2015-01-01T23:59:59.000Z

    We present paper six of the NIRSPEC Brown Dwarf Spectroscopic Survey, an analysis of multi-epoch, high-resolution (R~20,000) spectra of 25 field dwarf systems (3 late-type M dwarfs, 16 L dwarfs, and 6 T dwarfs) taken with the NIRSPEC infrared spectrograph at the W. M. Keck Observatory. With a radial velocity precision of ~2 km/s, we are sensitive to brown dwarf companions in orbits with periods of a few years or less given a mass ratio of 0.5 or greater. We do not detect any spectroscopic binary brown dwarfs in the sample. Given our target properties, and the frequency and cadence of observations, we use a Monte Carlo simulation to determine the detection probability of our sample. Even with a null detection result, our 1 sigma upper limit for very low mass binary frequency is 18%. Our targets included 7 known, wide brown dwarf binary systems. No significant radial velocity variability was measured in our multi-epoch observations of these systems, even for those pairs for which our data spanned a significant ...

  13. White dwarf masses in cataclysmic variables

    E-Print Network [OSTI]

    Wijnen, T P G; Schreiber, M R

    2015-01-01T23:59:59.000Z

    The white dwarf (WD) mass distribution of cataclysmic variables (CVs) has recently been found to dramatically disagree with the predictions of the standard CV formation model. The high mean WD mass among CVs is not imprinted in the currently observed sample of CV progenitors and cannot be attributed to selection effects. Two possibilities have been put forward: either the WD grows in mass during CV evolution, or in a significant fraction of cases, CV formation is preceded by a (short) phase of thermal time-scale mass transfer (TTMT) in which the WD gains a sufficient amount of mass. We investigate if either of these two scenarios can bring theoretical predictions and observations into agreement. We employed binary population synthesis models to simulate the present intrinsic CV population. We incorporated aspects specific to CV evolution such as an appropriate mass-radius relation of the donor star and a more detailed prescription for the critical mass ratio for dynamically unstable mass transfer. We also imp...

  14. A mini-survey for variability in early L dwarfs

    E-Print Network [OSTI]

    F. J. Clarke; B. R. Oppenheimer; C. G. Tinney

    2002-05-27T23:59:59.000Z

    We report differential I-band photometry of four early L-dwarfs obtained to study variability. We detect variability on the timescale of hours in two objects, 2M0746425+200032 (at a level of 0.007 mag -- 6.5 sigma) and 2M1108307+683017 (0.012 mag -- 5 sigma). We also place upper limits of 0.02 mag (1 sigma) on the variability of two others.

  15. Managing Variable Energy Resources to Increase Renewable Electricity's

    E-Print Network [OSTI]

    Managing Variable Energy Resources to Increase Renewable Electricity's Contribution to the Grid P o Contribution of Renewable Energy to Total Electricity Generation? 15 ManaGInG VaRIablE EnERGy REsouRCEs 16 What l i c y m a k e r G u i d e #12;Variable energy resources, such as wind power, now produce about 3

  16. MAS 108 Probability I Continuous random variables Summary

    E-Print Network [OSTI]

    Bailey, R. A.

    when a number is chosen at random from the interval [a,b], with all values equally likely. · p.d.f. f if x > b. · E(X) = (a+b)/2, Var(X) = (b-a)2/12. Normal random variable N(µ,2) (Lindley and Scott, TableMAS 108 Probability I Continuous random variables Summary Uniform random variable U[a,b] · Occurs

  17. UNCORRECTEDPROOF 1 Toward process-

    E-Print Network [OSTI]

    UNCORRECTEDPROOF 1 Toward process- ^ based modeling of geochemical soil formation across diverse 2 that integrates geochemical and geomorphic processes responsible for 11 soils' elemental and mineralogical). The model considers processes including the production of PDZ, weathering 15 front propagation, mineral

  18. Landers, Ulsoy, and Furness 1 Process Monitoring and Control of Machining Operations

    E-Print Network [OSTI]

    Landers, Robert G.

    it generates. Unmanned monitoring algorithms utilize filtered sensor measurements which, along with operator is refereed to [2,3]. Process control is the manipulation of process variables (e.g., feed, speed, depthLanders, Ulsoy, and Furness 1 Process Monitoring and Control of Machining Operations Robert G

  19. Using P-Values To Design Statistical Process Control Charts Zhonghua Li1

    E-Print Network [OSTI]

    Qiu, Peihua

    Phase II statistical process control (SPC) charts are designed using control limits; a chart gives designing the SPC charts using p-values. By this approach, at each time point of Phase II process monitoring-starting; Variable Sampling. 1 Introduction Statistical process control (SPC) charts are used widely for monitoring

  20. A Linear-Time Approach for Static Timing Analysis Covering All Process Corners

    E-Print Network [OSTI]

    Najm, Farid N.

    A Linear-Time Approach for Static Timing Analysis Covering All Process Corners Sari Onaissi into the timing analysis of a circuit. With the increase in the number of interesting process vari- ables process variations lead to circuit timing variability and a corresponding timing yield loss. Traditional

  1. Bayesian network for the characterization of faults in a multivariate process

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Bayesian network for the characterization of faults in a multivariate process Sylvain VERRON of multivariate processes, we propose an original network structure allowing deciding if a fault is appeared in the process. More, this structure permits the identification of the variables that are responsible (root

  2. Fault Diagnosis with Bayesian Networks: Application to the Tennessee Eastman Process

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Fault Diagnosis with Bayesian Networks: Application to the Tennessee Eastman Process Sylvain VERRON is to present and evaluate the performance of a new procedure for industrial process diagnosis. This method are not very efficient in the space described by all variables of the process, an identification of impor- tant

  3. IEEE International Conference on Power and Energy (PECon 08), December 1-3, 2008, Johor Baharu, Malaysia Variable High Frequency Voltage Source for an

    E-Print Network [OSTI]

    Hammerton, James

    , Malaysia Variable High Frequency Voltage Source for an Ohmic Heating Process A. Toudeshki, N. Mariun SMIEEE: arashtoudeshki@gmail.com Abstract-- Heating is an important step in food processing. A new method of heating uses the natural electrical resistance of the food to generate heat. In this method electrical energy

  4. Control Strategies for Centrifugal Pumps with Variable Flow Rate...

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

    This tip sheet discusses control strategies for centrifugal pumps with variable flow rate requirements in pumping systems and includes installation considerations. PUMPING SYSTEMS...

  5. Strategies and Decision Support Systems for Integrating Variable...

    Open Energy Info (EERE)

    Strategies and Decision Support Systems for Integrating Variable Energy Resources in Control Centers for Reliable Grid Operations: Global Best Practices, Examples of Excellence and...

  6. antibody variable region: Topics by E-print Network

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

    Summary: -seasonal climate variability: simulation and prediction using POAMA-2 Andrew Marshall Debbie Hudson, Matthew management Can POAMA help fill the gap? 12;Background...

  7. Joint Variable Selection for Data Envelope Analysis via Group Sparsity

    E-Print Network [OSTI]

    Irene Song

    2014-02-15T23:59:59.000Z

    highly correlated variables and does not care which one is selected (Zou and Hastie 2005). Hence, an approach ...... Health Services Management. Research ...

  8. 18.112 Functions of a Complex Variable, Fall 2005

    E-Print Network [OSTI]

    Helgason, Sigurdur, 1927-

    The basic properties of functions of one complex variable. Cauchy's theorem, holomorphic and meromorphic functions, residues, contour integrals, conformal mapping. Infinite series and products, the gamma function, the ...

  9. 18.112 Functions of a Complex Variable, Fall 2006

    E-Print Network [OSTI]

    Helgason, Sigurdur, 1927-

    The basic properties of functions of one complex variable. Cauchy's theorem, holomorphic and meromorphic functions, residues, contour integrals, conformal mapping. Infinite series and products, the gamma function, the ...

  10. ASSESSMENT OF VARIABLE EFFECTS OF SYSTEMS WITH DEMAND RESPONSE RESOURCES

    E-Print Network [OSTI]

    Gross, George

    ASSESSMENT OF VARIABLE EFFECTS OF SYSTEMS WITH DEMAND RESPONSE RESOURCES BY ANUPAMA SUNIL KOWLI B of consumers - called demand response resources (DRRs) - whose role has become increasingly important

  11. Polymorphic Typing of Variables and References GEOFFREY SMITH

    E-Print Network [OSTI]

    Smith, Geoffrey

    Polymorphic Typing of Variables and References GEOFFREY SMITH Florida International University reflect the views of the National Science Foundation. Authors' addresses: G. Smith, School of Computer

  12. Variable Charge Soils: Their Mineralogy, Chemistry and Management

    SciTech Connect (OSTI)

    Qafoku, Nik; Van Ranst, Eric; Noble, Andrew; Baert, Geert

    2004-07-01T23:59:59.000Z

    In this article, the mineralogy, chemistry and management of variable charge soils that are spread throughout the world are treated in details.

  13. atlantic oscillation variability: Topics by E-print Network

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

    human-induced global warming, or a combination of both factors, have been suggested. Several previous studies have discussed observed multidecadal variability in the...

  14. additive genetic variability: Topics by E-print Network

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

    the evolution of centrifugal... pumps and their application. The fundamentals of variable speed centrifugal pump operation are reviewed, then the advantages and evaluation...

  15. antibody variable gene: Topics by E-print Network

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

    in the evolution of centrifugal... pumps and their application. The fundamentals of variable speed centrifugal pump operation are reviewed, then the advantages and evaluation...

  16. antibodies demonstrate variable: Topics by E-print Network

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

    in the evolution of centrifugal... pumps and their application. The fundamentals of variable speed centrifugal pump operation are reviewed, then the advantages and evaluation...

  17. A MONTE CARLO SIMULATION OF WATER FLOW IN VARIABLY ...

    E-Print Network [OSTI]

    1910-10-30T23:59:59.000Z

    Field studies in soils sciences and hydrology during the last two decades have demonstrated extensive variability in saturated and unsaturated hydraulic ...

  18. Advanced Variable Speed Air-Source Integrated Heat Pump 2013...

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

    Pump 2013 Peer Review Advanced Variable Speed Air-Source Integrated Heat Pump 2013 Peer Review Emerging Technologies Project for the 2013 Building Technologies Office's Program...

  19. anatomic variables affecting: Topics by E-print Network

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

    of variable impedance prosthetic sockets for trans-tibial amputees : polyjet matrix 3D printing of comfortable prosthetic sockets using digital anatomical data MIT - DSpace...

  20. Optimal combined wind power forecasts using exogeneous variables

    E-Print Network [OSTI]

    Optimal combined wind power forecasts using exogeneous variables Fannar ¨Orn Thordarson Kongens of the thesis is combined wind power forecasts using informations from meteorological forecasts. Lyngby, January

  1. Variability in Ultrasound Education among Emergency Medicine Residencies

    E-Print Network [OSTI]

    Ahern, Matthew; Mallin, Michael P; Weitzel, Scott; Madsen, Troy; Hunt, Pat

    2010-01-01T23:59:59.000Z

    Journal of Emergency Medicine Variability in UltrasoundDivision of Emergency Medicine, 30 South 1500 East Rm1C026,Training in Emergency Medicine Resideny Programs. Acad Emerg

  2. Characterization of proper optimal elements with variable ordering ...

    E-Print Network [OSTI]

    2015-01-14T23:59:59.000Z

    Page 1 ... Vector optimization problems with such variable ordering structures are the topic of this manuscript. .... tions and their relations are the topic of Sect. 3.

  3. Separation Processes, Second Edition

    E-Print Network [OSTI]

    King, C. Judson

    1980-01-01T23:59:59.000Z

    Styrene Process Distillation Column Design, in "Professors'in Styrene Process Distillation Column Design, in "Profes-considered an easy distillation column design problem, but

  4. Salt Waste Processing Initiatives

    Office of Environmental Management (EM)

    1 Patricia Suggs Salt Processing Team Lead Assistant Manager for Waste Disposition Project Office of Environmental Management Savannah River Site Salt Waste Processing Initiatives...

  5. process.h

    E-Print Network [OSTI]

    /* process.h Symbols and structures for process management. Copyright (c) Borland International 1987 All Rights Reserved. */ #if __STDC__ #define _Cdecl

  6. Postdoc Application Process

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

    Program Application Process Postdoc Application Process Point your career towards LANL: work with the best minds on the planet in an inclusive environment that is rich in...

  7. Approximation of Stochastic Process

    E-Print Network [OSTI]

    Alois Pichler

    2012-05-08T23:59:59.000Z

    May 8, 2012 ... The approximation of stochastic processes by trees is an important topic in ... process ? is replaced by a finitely valued stochastic scenario ...

  8. SAGE Application Process

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

    Application Process SAGE Application Process A National Science Foundation Research Experiences for Undergraduates program Contacts Institute Director Harald Dogliani-Los Alamos...

  9. Multiple System Rate Process

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

    DSW Multiple System Transmission Rate Process Federal Register Notice Withdrawing Rate Proposal (PDF) Formal Process Extension Federal Register Notice (PDF) Customer Savisngs Under...

  10. Process Limits on Euclid

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

    Process Limits Process Limits Limit Hard Soft core file size (blocks) 0 unlimited data seg size (kbytes) unlimited unlimited scheduling priority 0 0 file size (blocks) unlimited...

  11. Undergraduate Program Selection Process

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

    Selection Process Undergraduate Program Selection Process Point your career towards Los Alamos Lab: work with the best minds on the planet in an inclusive environment that is rich...

  12. Scientists develop data origami approach to find optimal process routes in photovoltaics

    E-Print Network [OSTI]

    variables can combine to optimize a solar cell's performance. Key Result NREL researchers uncovered multiple process lines and don't add any cost. Potential Impact PV manufacturers may benefit from the advanced

  13. Resampling technique to correct for the Doppler effect in a search for gravitational waves

    SciTech Connect (OSTI)

    Braccini, S.; Cella, G.; Ferrante, I.; Passuello, D.; Torre, O. [INFN, Sezione di Pisa (Italy); INFN, Sezione di Pisa (Italy); INFN, Sezione di Pisa (Italy); Universita di Pisa (Italy); INFN, Sezione di Pisa (Italy); INFN, Sezione di Pisa (Italy); Universita di Siena (Italy)

    2011-02-15T23:59:59.000Z

    The frequency of any gravitational-wave signal received from a spinning neutron star will appear Doppler-shifted by the Earth's rotation and orbital motion. This frequency shift must be compensated to recover the signal energy as a spectral monochromatic peak with a high signal-to-noise ratio. Generally the correction depends on the source's position in the sky, spin, and spin-down rate. Here we propose a method of applying a single correction to the data which is valid for all the emission frequencies at a fixed position in the sky and for a given spin-down rate. We advance or retard the antenna proper time by removing (or repeating) single samples of the digitized output signal to keep the effective receiver and source clocks in accurate synchronization. The method, which requires just a few lines of code and little computational effort, appears to be very effective for ''semitargeted'' searches, where the source direction is known but the emission frequency is not.

  14. RAO-BLACKWELLIZED RESAMPLING PARTICLE FILTER FOR REAL-TIME PLAYER TRACKING IN SPORTS

    E-Print Network [OSTI]

    Cremers, Daniel

    . Hoyningen-Huene, Michael Beetz Intelligent Autonomous Systems Group, Technische Universit¨at M¨unchen, Boltzmannstr. 3, D-85748 Garching, Germany hoyninge, beetz@cs.tum.edu Keywords: Multi-target tracking, Particle

  15. HYDROLOGICAL PROCESSES Hydrol. Process. 23, 29022914 (2009)

    E-Print Network [OSTI]

    Kienzle, Stefan W.

    2009-01-01T23:59:59.000Z

    modelling effort indicate that hyporheic and dead zone heat fluxes are important, whereas solar radiationHYDROLOGICAL PROCESSES Hydrol. Process. 23, 2902­2914 (2009) Published online 24 July 2009 in Wiley the significance of individual heat fluxes within streams with an emphasis on testing (i.e. identification

  16. Distinguished rheological models in the framework of a thermodynamical internal variable theory

    E-Print Network [OSTI]

    Asszonyi, Cs; Ván, P

    2014-01-01T23:59:59.000Z

    We present and analyze a thermodynamical theory of rheology with single internal variable. The universality of the model is ensured as long as the mesoscopic and/or microscopic background processes satisfy the applied thermodynamical principles, which are the second law, the basic balances and the existence of an additional-tensorial-state variable. The resulting model, which we suggest to call the Kluitenberg-Verh\\'as body, is the Poynting-Thomson-Zener body with an additional inertial element, or, in other words, is the extension of Jeffreys model to solids. We argue that this Kluitenberg-Verh\\'as body is the natural thermodynamical building block of rheology. An important feature of the presented methodology is that nontrivial inequality-type restrictions arise for the four parameters of the model. We compare these conditions and other aspects to those of other known thermodynamical approaches, like Extended Irreversible Thermodynamics or the original theory of Kluitenberg.

  17. Process Algebra Rance Cleaveland

    E-Print Network [OSTI]

    Process Algebra Rance Cleaveland Department of Computer Science P.O. Box 7534 North Carolina State York at Stony Brook Stony Brook, NY 11794-4400 USA April 7, 1999 Abstract Process algebra represents a mathematically rigorous framework for modeling con- current systems of interacting processes. The process-algebraic

  18. EQUIVALENCE RELATIONS FOR TWO VARIABLE REAL ANALYTIC FUNCTION GERMS

    E-Print Network [OSTI]

    EQUIVALENCE RELATIONS FOR TWO VARIABLE REAL ANALYTIC FUNCTION GERMS SATOSHI KOIKE & ADAM PARUSI´NSKI Abstract. For two variable real analytic function germs we compare the blow- analytic equivalence in the sense of Kuo to the other natural equivalence relations. Our main theorem states that C1 equivalent

  19. Indifference fee rate for variable annuities Etienne CHEVALIER

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Introduced in the 1970s in the United States (see [22]), variable annuities are equity-linked contractsIndifference fee rate for variable annuities Etienne CHEVALIER Thomas LIM Ricardo ROMO ROMERO method for indifference fees. We focus on the guaranteed minimum death benefits and the guaranteed

  20. RESEARCH ARTICLE Development and characterization of a variable turbulence

    E-Print Network [OSTI]

    Lieuwen, Timothy C.

    (7):1037­1048, 2009), where variable blockage ratio slots are located upstream of a contoured nozzle. Vortical A Nozzle exit area E Power spectral density ReD Geometric Reynolds number Rel Turbulent Reynolds number SLRESEARCH ARTICLE Development and characterization of a variable turbulence generation system A

  1. Optimal Controlled Variables for Polynomial Systems Johannes Jaschke, Sigurd Skogestad

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Optimal Controlled Variables for Polynomial Systems Johannes J¨aschke, Sigurd Skogestad Department control enables us to separate the two problems of optimizing the system and designing the controller Abstract We present a method for finding optimal controlled variables, which are poly- nomial combinations

  2. Density regulation in annual plant communities under variable resource levels

    E-Print Network [OSTI]

    Novoplansky, Ariel

    Density regulation in annual plant communities under variable resource levels Hagit Shilo. E. and Turkington, R. 2005. Density regulation in annual plant communities under variable resource levels. Á/ Oikos 108: 241Á/252. Density regulation is assumed to be common, but is very rarely tested

  3. Truss topology design with integer variables made easy*

    E-Print Network [OSTI]

    2010-05-12T23:59:59.000Z

    conditions depending both on the state variable (displacement) and the design variable. (thickness). ..... t = double(t); pic(par,t);. The SDP code used in all our .... finished PLATO-N project (see project website www.plato-n.org for details).

  4. A Variable Cell Model for Simulating Gas Condensate Reservoir Performance

    E-Print Network [OSTI]

    Al-Majed, Abdulaziz Abdullah

    maturation profiles, which ie exhibitpd when gas pressure. Between this region near tha wellbore, SPE-~~~ SPE 21428 A Variable Cell Model for Simulating Gas Condensate Reservoir Performance A of depletion performance of gas condensate reservoirs report the existence of a A variable cell model

  5. Interannual variability of photosynthesis across Africa and its attribution

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    Interannual variability of photosynthesis across Africa and its attribution Christopher A. Williams of photosynthesis across the African continent during the period 1982­2003. Acute soil water stress emerges as the primary factor driving interannual variability of photosynthesis for most of Africa. Southern savannas

  6. RESEARCH ARTICLE Empirical assessment of short-term variability from

    E-Print Network [OSTI]

    -term variability; PV plant ramp rate; daily aggregate ramp rate; inverter shells *Correspondence Rob van HaarenRESEARCH ARTICLE Empirical assessment of short-term variability from utility-scale solar PV plants and the output from 390 inverters. We use a simple metric, "daily aggregate ramp rate" to quantify, categorize

  7. Wave spectral energy variability in the northeast Peter D. Bromirski

    E-Print Network [OSTI]

    Bromirski, Peter D.

    January 2005; published 8 March 2005. [1] The dominant characteristics of wave energy variability of monthly wave energy anomalies reveal that all three wave energy components exhibit similar patterns of spatial variability. The dominant mode represents coherent heightened (or diminished) wave energy along

  8. Variability of hot mix asphalt produced with reclaimed asphalt pavement

    E-Print Network [OSTI]

    Yang, Guiqin

    1999-01-01T23:59:59.000Z

    percent does not significantly influence the mix variability; it is desirable to use a large percentage of RAP in the Type S-I mix, i.e., more than 40% RAP; iii) On the average, the aggregate variability increases after transportation and stockpiling...

  9. Testing Dependence Among Serially Correlated Multi-category Variables

    E-Print Network [OSTI]

    Pesaran, M Hashem; Timmermann, Allan

    Testing Dependence Among Serially Correlated Multi-category Variables M. Hashem Pesaran and Allan Timmermann July 2006 CWPE 0648 Testing Dependence Among Serially Correlated... Multi-category Variables? M. Hashem Pesaran Cambridge University Allan Timmermann University of California, San Diego July 3, 2006 ?We benefitted from the comments of Herman van Dijk and Adrian Pagan and from participants at the Econometric Institute...

  10. Ground surface temperatures in Canada: Spatial and temporal variability

    E-Print Network [OSTI]

    Long, Bernard

    show that the ground has warmed about 0.7 K in the last 100 years. Spatial variability is significant temperatures in Canada: Spatial and temporal variability, Geophys. Res. Lett., 30(10), 1499, doi:10.1029/2003GL inferred from geothermal data have shown that the study of perturbations to the Earth's energy balance

  11. Simulation and characterization of the Adriatic Sea mesoscale variability

    E-Print Network [OSTI]

    Cushman-Roisin, Benoit

    Simulation and characterization of the Adriatic Sea mesoscale variability Benoit Cushman-Roisin,1 resolve the mesoscale variability because the grid size falls below the first baroclinic deformation in two larger-scale models. The present simulations demonstrate that the DieCAST model allows mesoscale

  12. Solar activity and earth rotation variability R. Abarca del Rioa,

    E-Print Network [OSTI]

    Dai, Aiguo

    to secular times scales, meteorological and climatic data are correlated with solar variability (see reviews changes in solar output could be amplified in the Earth's atmosphere. In fact, at wavelengths not visibleSolar activity and earth rotation variability R. Abarca del Rioa, *, D. Gambisb , D. Salsteinc , P

  13. American Institute of Aeronautics and Astronautics Fluidic Variable Inertia Flywheel

    E-Print Network [OSTI]

    Van de Ven, James D.

    American Institute of Aeronautics and Astronautics 1 Fluidic Variable Inertia Flywheel James D. Van for many applications from hybrid vehicles to off-peak electric power to rotating machinery. A flywheel. This work proposes a novel self-governing fluidic variable inertia flywheel that can maintain a constant

  14. Testing of a variable-stroke Stirling engine

    SciTech Connect (OSTI)

    Thieme, L.G.; Allen, D.J.

    1986-01-01T23:59:59.000Z

    Testing of a variable-stroke Stirling engine at NASA Lewis has been completed. In support of the US Department of Energy's Stirling Engine Highway Vehicle Systems Program, the engine was tested for about 70 hr total with both helium and hydrogen working fluids over a range of pressures and strokes. A direct comparison was made of part-load efficiencies obtained with variable-stroke and variable-pressure operation. Two failures with the variable-angle swash-plate drive system limited testing to low power levels. These failures are not thought to be caused by problems inherent in the variable-stroke concept but they do emphasize the need for careful design in the area of the crossheads where the failures occurred. This paper describes these failures and the efforts to resolve the associated problems, and presents test results that were obtained. 5 refs., 17 figs.

  15. Device-Independent Quantum Cryptography for Continuous Variables

    E-Print Network [OSTI]

    Kevin Marshall; Christian Weedbrook

    2014-05-27T23:59:59.000Z

    We present the first device-independent quantum cryptography protocol for continuous variables. Our scheme is based on the Gottesman-Kitaev-Preskill encoding scheme whereby a qubit is embedded in the infinite-dimensional space of a quantum harmonic oscillator. The novel application of discrete-variable device-independent quantum key distribution to this encoding enables a continuous-variable analogue. Since the security of this protocol is based on discrete-variables we inherit by default security against collective attacks and, under certain memoryless assumptions, coherent attacks. We find that our protocol is valid over the same distances as its discrete-variable counterpart, except that we are able to take advantage of high efficiency commercially available detectors where, for the most part, only homodyne detection is required. This offers the potential of removing the difficulty in closing the loopholes associated with Bell inequalities.

  16. Mythical Maia, ultrashort and 53 PSC variables. Lecture 4

    SciTech Connect (OSTI)

    Cox, A.N.

    1983-03-14T23:59:59.000Z

    Moving down the main sequence from the ..beta.. Cephei variables, we come to later B-type stars. The suspicion of variability for these stars goes back to Vogel in 1891 who studied the radial velocities of Vega. Since that time there have been numerous studies of Vega (Wisniewski and Johnson 1979, Fernie 1981) and other B and early A stars which hint at variability in both radial velocity and light. Since Struve (1955) discussed these stars 28 years ago, they have been called the Maia stars after the Pleiades star that he thought was the prototype. The uncertainty in their actual variability has led Breger (1980) to call them the mythical Maia variables.

  17. Hybrid digital signal processing and neural networks applications in PWRs

    SciTech Connect (OSTI)

    Eryurek, E.; Upadhyaya, B.R.; Kavaklioglu, K.

    1991-01-01T23:59:59.000Z

    Signal validation and plant subsystem tracking in power and process industries require the prediction of one or more state variables. Both heteroassociative and auotassociative neural networks were applied for characterizing relationships among sets of signals. A multi-layer neural network paradigm was applied for sensor and process monitoring in a Pressurized Water Reactor (PWR). This nonlinear interpolation technique was found to be very effective for these applications.

  18. Hybrid digital signal processing and neural networks applications in PWRs

    SciTech Connect (OSTI)

    Eryurek, E.; Upadhyaya, B.R.; Kavaklioglu, K.

    1991-12-31T23:59:59.000Z

    Signal validation and plant subsystem tracking in power and process industries require the prediction of one or more state variables. Both heteroassociative and auotassociative neural networks were applied for characterizing relationships among sets of signals. A multi-layer neural network paradigm was applied for sensor and process monitoring in a Pressurized Water Reactor (PWR). This nonlinear interpolation technique was found to be very effective for these applications.

  19. Multiobjective optimization of the dry electric discharge machining process

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    information on the optimum operating conditions. A number of performance variables such as material removal pressure and spindle speed. A Pareto­optimal front was then obtained using NSGA II. Analysis of the front place through the process of controlled spark generation. It is one of the most popular non

  20. PROCESS MODELING AND CONTROL The Department of Chemical Engineering

    E-Print Network [OSTI]

    Lightsey, Glenn

    economic performance · MIMO (vs. SISO) models · Nonlinear (vs. linear) models · Stochastic variables.D. Graduates (2005 - 2008) Student/Supervisor Destination E. Hale (JQ) Ph.D. (8/05) NREL R. Chong (TFE) M.S. (8 (Emerson Process Management) · J. Lee (postdoc) ­ Various topics in multivariable control (e.g., multiloop

  1. Idaho Chemical Processing Plant Process Efficiency improvements

    SciTech Connect (OSTI)

    Griebenow, B.

    1996-03-01T23:59:59.000Z

    In response to decreasing funding levels available to support activities at the Idaho Chemical Processing Plant (ICPP) and a desire to be cost competitive, the Department of Energy Idaho Operations Office (DOE-ID) and Lockheed Idaho Technologies Company have increased their emphasis on cost-saving measures. The ICPP Effectiveness Improvement Initiative involves many activities to improve cost effectiveness and competitiveness. This report documents the methodology and results of one of those cost cutting measures, the Process Efficiency Improvement Activity. The Process Efficiency Improvement Activity performed a systematic review of major work processes at the ICPP to increase productivity and to identify nonvalue-added requirements. A two-phase approach was selected for the activity to allow for near-term implementation of relatively easy process modifications in the first phase while obtaining long-term continuous improvement in the second phase and beyond. Phase I of the initiative included a concentrated review of processes that had a high potential for cost savings with the intent of realizing savings in Fiscal Year 1996 (FY-96.) Phase II consists of implementing long-term strategies too complex for Phase I implementation and evaluation of processes not targeted for Phase I review. The Phase II effort is targeted for realizing cost savings in FY-97 and beyond.

  2. A Business Process Explorer: Recovering Business Processes from Business Applications

    E-Print Network [OSTI]

    Zou, Ying

    processes, and visualizing business processes using commercial business process modeling tools, such as IBM WebSphere Business Modeler (WBM) [4]. Traceability between business processes and business1 A Business Process Explorer: Recovering Business Processes from Business Applications Jin Guo

  3. TW Hya: SPECTRAL VARIABILITY, X-RAYS, AND ACCRETION DIAGNOSTICS

    SciTech Connect (OSTI)

    Dupree, A. K.; Brickhouse, N. S.; Cranmer, S. R.; Luna, G. J. M.; Schneider, E. E. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Bessell, M. S. [Australian National Observatory, Mount Stromlo Observatory, Canberra, ACT 2611 (Australia); Bonanos, A. [Institute of Astronomy and Astrophysics, National Observatory of Athens, 15236 Athens (Greece); Crause, L. A. [South African Astronomical Observatory, P.O. Box 9, Observatory 7935, Cape Town (South Africa); Lawson, W. A. [School of Physical, Environmental, and Math Sciences, University of New South Wales, Canberra, ACT 2600 (Australia); Mallik, S. V. [Indian Institute of Astrophysics, Bangalore 560034 (India); Schuler, S. C. [National Optical Astronomy Observatory, Tucson, AZ 85719 (United States)

    2012-05-01T23:59:59.000Z

    The nearest accreting T Tauri star, TW Hya was intensively and continuously observed over {approx}17 days with spectroscopic and photometric measurements from four continents simultaneous with a long segmented exposure using the Chandra satellite. Contemporaneous optical photometry from WASP-S indicates a 4.74 day period was present during this time. The absence of a similar periodicity in the H{alpha} flux and the total X-ray flux which are dominated by accretion processes and the stellar corona, respectively, points to a different source of photometric variations. The H{alpha} emission line appears intrinsically broad and symmetric, and both the profile and its variability suggest an origin in the post-shock cooling region. An accretion event, signaled by soft X-rays, is traced spectroscopically for the first time through the optical emission line profiles. After the accretion event, downflowing turbulent material observed in the H{alpha} and H{beta} lines is followed by He I ({lambda}5876) broadening near the photosphere. Optical veiling resulting from the heated photosphere increases with a delay of {approx}2 hr after the X-ray accretion event. The response of the stellar coronal emission to an increase in the veiling follows {approx}2.4 hr later, giving direct evidence that the stellar corona is heated in part by accretion. Subsequently, the stellar wind becomes re-established. We suggest a model that incorporates the dynamics of this sequential series of events: an accretion shock, a cooling downflow in a supersonically turbulent region, followed by photospheric and later, coronal heating. This model naturally explains the presence of broad optical and ultraviolet lines, and affects the mass accretion rates determined from emission line profiles.

  4. Reduced crude processing with Ashland's RCC process

    SciTech Connect (OSTI)

    Zandona, O.J.; Busch, L.E.; Hettinger, W.P.

    1982-05-01T23:59:59.000Z

    Ashland Oil has long recognized the need to improve the process for the direct conversion of residual feedstocks into transportation fuels and other lighter products. The reduced crude oil conversion (RCC) unit now under construction at the Catlettsburg, Kentucky, refinery was developed to meet these demands. The facility incorporates RCC process innovations and recent catalyst technology improvements, and provides increased operating flexibility. Heavier, higher-sulfur crude oils can be processed under several economically attractive scenarios. They allow for an excellent balance between the production of transportation fuels, and reduced amounts of heavy fractions. An outstanding feature of the RCC process is the highoctane quality of full-boiling-range gasoline that results when converting residual feedstocks.

  5. Turbo-generator control with variable valve actuation

    DOE Patents [OSTI]

    Vuk, Carl T. (Denver, IA)

    2011-02-22T23:59:59.000Z

    An internal combustion engine incorporating a turbo-generator and one or more variably activated exhaust valves. The exhaust valves are adapted to variably release exhaust gases from a combustion cylinder during a combustion cycle to an exhaust system. The turbo-generator is adapted to receive exhaust gases from the exhaust system and rotationally harness energy therefrom to produce electrical power. A controller is adapted to command the exhaust valve to variably open in response to a desired output for the turbo-generator.

  6. Time resolved spectroscopy of the variable brown dwarf Kelu-1

    E-Print Network [OSTI]

    F. J. Clarke; C. G. Tinney; S. T. Hodgkin

    2003-01-09T23:59:59.000Z

    We report the results of observations designed to investigate the spectroscopic signatures of dust clouds on the L2 brown dwarf Kelu-1. Time resolved medium resolution spectra show no significant evidence of variability in the dust sensitive TiO, CrH and FeH bandheads on the timescale of 1--24 hours. We do however report periodic variability in the psuedo-equivelent width of H-alpha consistent with the 1.8 hour rotation period previously reported for this object Clarke, Tinney & Tolley (2002). Near-contemporaneous I-band photometry shows evidence for non-periodic variability at the level of 2%.

  7. ENSEMBLE VARIABILITY OF NEAR-INFRARED-SELECTED ACTIVE GALACTIC NUCLEI

    SciTech Connect (OSTI)

    Kouzuma, S. [School of International Liberal Studies, Chukyo University, Toyota 470-0393 (Japan); Yamaoka, H., E-mail: skouzuma@lets.chukyo-u.ac.jp, E-mail: yamaoka@phys.kyushu-u.ac.jp [Department of Physics, Kyushu University, Fukuoka 812-8581 (Japan)

    2012-03-01T23:59:59.000Z

    We present the properties of the ensemble variability V for nearly 5000 near-infrared active galactic nuclei (AGNs) selected from the catalog of Quasars and Active Galactic Nuclei (13th Edition) and the SDSS-DR7 quasar catalog. From three near-infrared point source catalogs, namely, Two Micron All Sky Survey (2MASS), Deep Near Infrared Survey (DENIS), and UKIDSS/LAS catalogs, we extract 2MASS-DENIS and 2MASS-UKIDSS counterparts for cataloged AGNs by cross-identification between catalogs. We further select variable AGNs based on an optimal criterion for selecting the variable sources. The sample objects are divided into subsets according to whether near-infrared light originates by optical emission or by near-infrared emission in the rest frame; and we examine the correlations of the ensemble variability with the rest-frame wavelength, redshift, luminosity, and rest-frame time lag. In addition, we also examine the correlations of variability amplitude with optical variability, radio intensity, and radio-to-optical flux ratio. The rest-frame optical variability of our samples shows negative correlations with luminosity and positive correlations with rest-frame time lag (i.e., the structure function, SF), and this result is consistent with previous analyses. However, no well-known negative correlation exists between the rest-frame wavelength and optical variability. This inconsistency might be due to a biased sampling of high-redshift AGNs. Near-infrared variability in the rest frame is anticorrelated with the rest-frame wavelength, which is consistent with previous suggestions. However, correlations of near-infrared variability with luminosity and rest-frame time lag are the opposite of these correlations of the optical variability; that is, the near-infrared variability is positively correlated with luminosity but negatively correlated with the rest-frame time lag. Because these trends are qualitatively consistent with the properties of radio-loud quasars reported by some previous studies, most of our sample objects are probably radio-loud quasars. Finally, we also discuss the negative correlations seen in the near-infrared SFs.

  8. Market Designs for High Levels of Variable Generation: Preprint

    SciTech Connect (OSTI)

    Milligan, M.; Holttinen, H.; Kiviluoma, J.; Orths, A.; Lynch, M.; Soder, L.

    2014-10-01T23:59:59.000Z

    Variable renewable generation is increasing in penetration in modern power systems, leading to higher variability in the supply and price of electricity as well as lower average spot prices. This raises new challenges, particularly in ensuring sufficient capacity and flexibility from conventional technologies. Because the fixed costs and lifetimes of electricity generation investments are significant, designing markets and regulations that ensure the efficient integration of renewable generation is a significant challenge. This papers reviews the state of play of market designs for high levels of variable generation in the United States and Europe and considers new developments in both regions.

  9. Waste processing air cleaning

    SciTech Connect (OSTI)

    Kriskovich, J.R.

    1998-07-27T23:59:59.000Z

    Waste processing and preparing waste to support waste processing relies heavily on ventilation. Ventilation is used at the Hanford Site on the waste storage tanks to provide confinement, cooling, and removal of flammable gases.

  10. The requirements discovery process

    SciTech Connect (OSTI)

    Bahill, A.T. [Univ. of Arizona, Tucson, AZ (United States). Systems and Industrial Engineering; Dean, F.F. [Sandia National Lab., Albuquerque, NM (United States)

    1997-02-01T23:59:59.000Z

    Cost and schedule overruns are often caused by poor requirements that are produced by people who do not understand the requirement process. This paper provides a high-level overview of the requirements discovery process.

  11. Graduate Program Selection Process

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

    Selection Process Graduate Program Selection Process Point your career towards Los Alamos Lab: work with the best minds on the planet in an inclusive environment that is rich in...

  12. BCP Annual Rate Process

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

    2015 BCP Annual Rate Process (FY 2016 Base Charge & Rate) Informal Process Rate Activity Schedule (doc) Informal Customer Meeting Thursday March 11, 2015 at 10:30 A.M. Conf Rms 3&4...

  13. Indian Monsoon Depression: Climatology and Variability

    SciTech Connect (OSTI)

    Yoon, Jin-Ho; Huang, Wan-Ru (Judy) [Judy

    2012-03-09T23:59:59.000Z

    The monsoon climate is traditionally characterized by large seasonal rainfall and reversal of wind direction (e.g., Krishnamurti 1979). Most importantly this rainfall is the major source of fresh water to various human activities such as agriculture. The Indian subcontinent resides at the core of the Southeast Asian summer monsoon system, with the monsoon trough extended from northern India across Indochina to the Western Tropical Pacific (WTP). Large fraction of annual rainfall occurs during the summer monsoon season, i.e., June - August with two distinct maxima. One is located over the Bay of Bengal with rainfall extending northwestward into eastern and central India, and the other along the west coast of India where the lower level moist wind meets the Western Ghat Mountains (Saha and Bavardeckar 1976). The rest of the Indian subcontinent receives relatively less rainfall. Various weather systems such as tropical cyclones and weak disturbances contribute to monsoon rainfall (Ramage 1971). Among these systems, the most efficient rain-producing system is known as the Indian monsoon depression (hereafter MD). This MD is critical for monsoon rainfall because: (i) it occurs about six times during each summer monsoon season, (ii) it propagates deeply into the continent and produces large amounts of rainfall along its track, and (iii) about half of the monsoon rainfall is contributed to by the MDs (e.g., Krishnamurti 1979). Therefore, understanding various properties of the MD is a key towards comprehending the veracity of the Indian summer monsoon and especially its hydrological process.

  14. Fuel gas conditioning process

    DOE Patents [OSTI]

    Lokhandwala, Kaaeid A. (Union City, CA)

    2000-01-01T23:59:59.000Z

    A process for conditioning natural gas containing C.sub.3+ hydrocarbons and/or acid gas, so that it can be used as combustion fuel to run gas-powered equipment, including compressors, in the gas field or the gas processing plant. Compared with prior art processes, the invention creates lesser quantities of low-pressure gas per unit volume of fuel gas produced. Optionally, the process can also produce an NGL product.

  15. Semisolid Metal Processing Consortium

    SciTech Connect (OSTI)

    Apelian,Diran

    2002-01-10T23:59:59.000Z

    Mathematical modeling and simulations of semisolid filling processes remains a critical issue in understanding and optimizing the process. Semisolid slurries are non-Newtonian materials that exhibit complex rheological behavior. There the way these slurries flow in cavities is very different from the way liquid in classical casting fills cavities. Actually filling in semisolid processing is often counter intuitive

  16. Radiochemical Radiochemical Processing Laboratory

    E-Print Network [OSTI]

    in development, scale- up and deployment of first-of-a-kind processes to solve environmental problems in the fundamental chemistry of 4 RPL: RadiochemicalProcessingLaboratory Researchers design, build and operate small-scale-liquid suspensions. Developing Radiochemical Processes at All Scales Among the key features of the RPL are extensive

  17. Bolt Manufacture: Process Selection

    E-Print Network [OSTI]

    Colton, Jonathan S.

    file · Selective Laser Sintering (SLS) 3 D P i ti· 3-D Printing · Light Engineered Net Shaping (LENS Processes and Systems Prof. J.S. Colton © GIT 2009 20 #12;3D Printing Process (Soligen) ME 6222: Manufacturing Processes and Systems Prof. J.S. Colton © GIT 2009 21 #12;3D Printing Head (Soligen)3D Printing

  18. Engineering in Process Metallurgy

    E-Print Network [OSTI]

    New South Wales, University of

    MATS3003 Engineering in Process Metallurgy Course Outline Session 1, 2014 School of Materials ................................................................................................... 7 Course Objective To introduce the basic operations in process metallurgy and to provide Course at a Glance What you will learn Weeks Assessment Task Introduction - What is process metallurgy

  19. Managing forecast variability in a build-to-order environment

    E-Print Network [OSTI]

    Einhorn, Marshall

    2007-01-01T23:59:59.000Z

    In any production environment, managing demand variability is a delicate balancing act. Firms must constantly weigh potential obsolescence costs of unused inventory (should sales not materialize) against potential expedite ...

  20. Quantifying the Variable Effects of Systems with Demand Response Resources

    E-Print Network [OSTI]

    Gross, George

    Quantifying the Variable Effects of Systems with Demand Response Resources Anupama Kowli and George in the electricity industry. In particular, there is a new class of consumers, called demand response resources (DRRs

  1. The Variable Vector Countermeasure Suit for space habitation and exploration

    E-Print Network [OSTI]

    Vasquez, Rebecca (Rebecca Ann)

    2014-01-01T23:59:59.000Z

    The Variable Vector Countermeasure Suit (V2Suit) is a countermeasure suit for sensorimotor adaptation and musculoskeletal deconditioning in microgravity. The V2suit will consist of modules containing arrays of control ...

  2. Have Aerosols Caused the Observed Atlantic Multidecadal Variability?

    E-Print Network [OSTI]

    Zhang, Rong

    Identifying the prime drivers of the twentieth-century multidecadal variability in the Atlantic Ocean is crucial for predicting how the Atlantic will evolve in the coming decades and the resulting broad impacts on weather ...

  3. A New Luminous Blue Variable in M31

    E-Print Network [OSTI]

    Humphreys, Roberta M; Gordon, Michael S

    2015-01-01T23:59:59.000Z

    We report the fifth confirmed Luminous Blue Variable/S Doradus variable in M31. In 2006, J004526.62+415006.3 had the spectrum of hot Fe II emission line star with strong P Cygni profiles in the Balmer lines. In 2010, its absorption line spectrum resembled an early A-type supergiant with H and Fe II emission lines with strong P Cygni profiles, and in 2013 the spectrum had fully transitioned to an F-type supergiant due to the formation of the optically thick, cool wind which characterizes LBVs at maximum light. The photometric record supports the LBV/S Dor nature of the variability. Its bolometric luminosity ~ -9.65 mag places it on the HR Diagram near the known LBVs, AE And, Var C in M33 and S Dor.

  4. Blazar Variability and Evolution in the GeV Regime

    E-Print Network [OSTI]

    Tsujimoto, S; Nishijima, K; Kodani, K

    2015-01-01T23:59:59.000Z

    One of the most important problem of the blazar astrophysics is to understand the physical origin of the blazar sequence. In this study, we focus on the GeV gamma-ray variability of blazars and evolution perspective we search the relation between the redshift and the variability amplitude of blazars for each blazar subclass. We analyzed the Fermi-LAT data of the TeV blazars and the bright AGNs (flux $\\geq$ 4$\\times10^{-9}$ cm$^{-2}$s$^{-1}$) selected from the 2LAC (the 2nd LAT AGN catalog) data base. As a result, we found a hint of the correlation between the redshift and the variability amplitude in the FSRQs. Furthermore the BL Lacs which have relatively lower peak frequency of the synchrotron radiation and relatively lower redshift, have a tendency to have a smaller variability amplitude.

  5. Variable Frequency Motor Drives: Harmonics, Power Factor, and Energy Efficiency

    E-Print Network [OSTI]

    Massey, G. W.

    Variable frequency motor drives (VFD's) have been on the market for many years. Early versions were unreliable and prone to failure. Relatively recent developments in Pulse-Width Modulated (PWM) waveform technology have improved VFD reliability...

  6. The Effect of Variable Quality Fuels on Cogeneration Plant Performance 

    E-Print Network [OSTI]

    Ahner, D. J.; Oliva, J. J.

    1986-01-01T23:59:59.000Z

    The variable energy characteristics of solid wastes, biomass and other low grade fuels, when utilized in cogeneration applications, introduce several additional plant design considerations. The effects of longer term heating value and/or quantity...

  7. Impact of geometric variability on compressor repeating-stage performance

    E-Print Network [OSTI]

    Vincent, Antoine, 1979-

    2003-01-01T23:59:59.000Z

    The impact of geometric variability on compressor performance is investigated using a compressor repeating-stage model based on well-known correlations for profile losses, endwall blockage, deviation, and the onset of ...

  8. Heart rate variability in mice with coronary heart disease

    E-Print Network [OSTI]

    Zapanta, Laurence (Laurence F.)

    2005-01-01T23:59:59.000Z

    Heart rate variability (HRV), the beat-to-beat fluctuation of the heart rate, is a non-invasive test that measures the autonomic regulation of the heart. Assessment of HRV has been shown to predict the risk of mortality ...

  9. Coordinated Variable Structure Switching Attacks for Smart Grid

    E-Print Network [OSTI]

    Liu, Shan

    2013-02-11T23:59:59.000Z

    or more relays and circuit breakers of a power system to disrupt operation. Existence of this switching vulnerability is dependent on the local structure of the power grid. Variable structure systems theory is employed to effectively model the cyber...

  10. Variable Selection and Inference for Multi-period Forecasting Problems

    E-Print Network [OSTI]

    Pesaran, M Hashem; Pick, Andreas; Timmermann, Allan

    Variable Selection and Inference for Multi-period Forecasting Problems? M. Hashem Pesaran Cambridge University and USC Andreas Pick De Nederlandsche Bank and Cambridge University, CIMF Allan Timmermann UC San Diego and CREATES January 26, 2009...

  11. X-RAY SPECTRAL VARIABILITY IN NGC 3783

    E-Print Network [OSTI]

    Reis, R. C.

    NGC 3783 was observed for approximately 210 ks by Suzaku and in this time showed significant spectral and flux variability at both short (20 ks) and long (100 ks) timescales. The full observation is found to consist of ...

  12. The variability of warm absorbers in Active Galactic Nuclei

    E-Print Network [OSTI]

    Gibson, Robert R. (Robert Ross)

    2006-01-01T23:59:59.000Z

    This thesis presents three studies of warm (photoionized) absorber variability in Active Galactic Nuclei (AGN) using high-resolution X-ray spectra provided by the Chandra High Energy Transmission Grating (HETG). The first ...

  13. algorithm based variable: Topics by E-print Network

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

    Kibler; Marc K. Albert 1991-01-01 22 Forecasting the SST space-time variability of the Alboran Sea with genetic algorithms Nonlinear Sciences (arXiv) Summary: We propose a...

  14. alleles causing variable: Topics by E-print Network

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

    age of a neutral allele as a function of its Slatkin, Montgomery 13 Entropy Shows that Global Warming Should Cause Increased Variability in the Weather Physics (arXiv) Summary:...

  15. Studies of climate variability in a simple coupled model

    E-Print Network [OSTI]

    Abiven, Claude

    2007-01-01T23:59:59.000Z

    The mechanisms of variability of a coupled atmosphere-ocean model are investigated through the study of two coupled configurations: an aquaplanet in which gyres are absent, and an aquaplanet in which a ridge extending from ...

  16. Double-periodic blue variables in the Magellanic Clouds

    E-Print Network [OSTI]

    R. E. Mennickent; G. Pietrzynski; M. Diaz; W. Gieren

    2002-12-09T23:59:59.000Z

    We report the discovery, based on an inspection of the OGLE-II database, of a group of blue variables in the Magellanic Clouds showing simultaneously two kinds of photometric variability: a short-term cyclic variability with typical amplitude $\\Delta I \\sim$ 0.05 mag and period $P_{1}$ between 4 and 16 days and a sinusoidal, long-term cyclic oscillation with much larger amplitude $\\Delta I \\sim$ 0.2 mag with period $P_{2}$ in the range of 150-1000 days. We find that both periods seems to be coupled through the relationship $P_{2}$ = 35.2 $\\pm$ 0.8 $P_{1}$. In general, the short term variability is reminiscent of those shown by Algol-type binaries. We propose that the long-term oscillation could arise in the precession of a elliptical disc fed by a Roche-lobe filling companion in a low mass ratio Algol system.

  17. Estimating and mapping ecological processes influencing microbial community assembly

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

    Stegen, James; Lin, Xueju; Fredrickson, Jim K.; Konopka, Allan E.

    2015-05-01T23:59:59.000Z

    Ecological community assembly is governed by a combination of (i) selection resulting from among-taxa differences in performance; (ii) dispersal resulting from organismal movement; and (iii) ecological drift resulting from stochastic changes in population sizes. The relative importance and nature of these processes can vary across environments. Selection can be homogeneous or variable, and while dispersal is a rate, we conceptualize extreme dispersal rates as two categories; dispersal limitation results from limited exchange of organisms among communities, and homogenizing dispersal results from high levels of organism exchange. To estimate the influence and spatial variation of each process we extend a recentlymore »developed statistical framework, use a simulation model to evaluate the accuracy of the extended framework, and use the framework to examine subsurface microbial communities over two geologic formations. For each subsurface community we estimate the degree to which it is influenced by homogeneous selection, variable selection, dispersal limitation, and homogenizing dispersal. Our analyses revealed that the relative influences of these ecological processes vary substantially across communities even within a geologic formation. We further identify environmental and spatial features associated with each ecological process, which allowed mapping of spatial variation in ecological-process-influences. The resulting maps provide a new lens through which ecological systems can be understood; in the subsurface system investigated here they revealed that the influence of variable selection was associated with the rate at which redox conditions change with subsurface depth.« less

  18. Estimating and mapping ecological processes influencing microbial community assembly

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

    Stegen, James; Lin, Xueju; Fredrickson, Jim K.; Konopka, Allan E.

    2015-05-01T23:59:59.000Z

    Ecological community assembly is governed by a combination of (i) selection resulting from among-taxa differences in performance; (ii) dispersal resulting from organismal movement; and (iii) ecological drift resulting from stochastic changes in population sizes. The relative importance and nature of these processes can vary across environments. Selection can be homogeneous or variable, and while dispersal is a rate, we conceptualize extreme dispersal rates as two categories; dispersal limitation results from limited exchange of organisms among communities, and homogenizing dispersal results from high levels of organism exchange. To estimate the influence and spatial variation of each process we extend a recently developed statistical framework, use a simulation model to evaluate the accuracy of the extended framework, and use the framework to examine subsurface microbial communities over two geologic formations. For each subsurface community we estimate the degree to which it is influenced by homogeneous selection, variable selection, dispersal limitation, and homogenizing dispersal. Our analyses revealed that the relative influences of these ecological processes vary substantially across communities even within a geologic formation. We further identify environmental and spatial features associated with each ecological process, which allowed mapping of spatial variation in ecological-process-influences. The resulting maps provide a new lens through which ecological systems can be understood; in the subsurface system investigated here they revealed that the influence of variable selection was associated with the rate at which redox conditions change with subsurface depth.

  19. Evaluation of steelmaking processes

    SciTech Connect (OSTI)

    Fruehan, R.J. [Carnegie-Mellon Univ., Pittsburgh, PA (United States)

    1994-01-01T23:59:59.000Z

    Objective of the AISI Direct Steelmaking Program is to develop a process for producing steel directly from ore and coal; the process should be less capital intensive, consume less energy, and have higher productivity. A task force was formed to examine available processes: trough, posthearth, IRSID, Electric Arc Furnace, energy optimizing furnace. It is concluded that there is insufficient incentive to replace a working BOF with any of these processes to refine hot metal; however, if new steelmaking capacity is required, IRSID and EOF should be considered. A fully continuous process should not be considered until direct ironmaking and continuous refining are perfected.

  20. Nonaqueous processing methods

    SciTech Connect (OSTI)

    Coops, M.S.; Bowersox, D.F.

    1984-09-01T23:59:59.000Z

    A high-temperature process utilizing molten salt extraction from molten metal alloys has been developed for purification of spent power reactor fuels. Experiments with laboratory-scale processing operations show that purification and throughput parameters comparable to the Barnwell Purex process can be achieved by pyrochemical processing in equipment one-tenth the size, with all wastes being discharged as stable metal alloys at greatly reduced volume and disposal cost. This basic technology can be developed for large-scale processing of spent reactor fuels. 13 references, 4 figures.

  1. Expert system for testing industrial processes and determining sensor status

    DOE Patents [OSTI]

    Gross, K.C.; Singer, R.M.

    1998-06-02T23:59:59.000Z

    A method and system are disclosed for monitoring both an industrial process and a sensor. The method and system include determining a minimum number of sensor pairs needed to test the industrial process as well as the sensor for evaluating the state of operation of both. The technique further includes generating a first and second signal characteristic of an industrial process variable. After obtaining two signals associated with one physical variable, a difference function is obtained by determining the arithmetic difference between the pair of signals over time. A frequency domain transformation is made of the difference function to obtain Fourier modes describing a composite function. A residual function is obtained by subtracting the composite function from the difference function and the residual function (free of nonwhite noise) is analyzed by a statistical probability ratio test. 24 figs.

  2. Expert system for testing industrial processes and determining sensor status

    DOE Patents [OSTI]

    Gross, Kenneth C. (Bolingbrook, IL); Singer, Ralph M. (Naperville, IL)

    1998-01-01T23:59:59.000Z

    A method and system for monitoring both an industrial process and a sensor. The method and system include determining a minimum number of sensor pairs needed to test the industrial process as well as the sensor for evaluating the state of operation of both. The technique further includes generating a first and second signal characteristic of an industrial process variable. After obtaining two signals associated with one physical variable, a difference function is obtained by determining the arithmetic difference between the pair of signals over time. A frequency domain transformation is made of the difference function to obtain Fourier modes describing a composite function. A residual function is obtained by subtracting the composite function from the difference function and the residual function (free of nonwhite noise) is analyzed by a statistical probability ratio test.

  3. Unwinding the Spin on Variable Speed Drive Air Compressors

    E-Print Network [OSTI]

    Beals, C. E.

    2006-01-01T23:59:59.000Z

    Unwinding the Spin on Variable Speed Drive Air Compressors By Chris E. Beals, President, Air System Management, Inc Over the past several years, the variable speed drive (VSD) compressor has become a frequent choice for new compressor... purchases. The VSD compressor’s popularity is partly due to rising energy prices and its efficiency as a trim compressor. Unfortunately, much of the VSD compressor’s popularity is a result of spin applied by the marketers. For example, sales...

  4. Interdiurnal temperature variability over the conterminous United States and Canada

    E-Print Network [OSTI]

    Rice, Peter Bruce

    1988-01-01T23:59:59.000Z

    INTERDIURNAL TEMPERATURE VARIABILITY OVER THE CONTERMINOUS UNITED STATES AND CANADA A Thesis by PETER BRUCE RICE Submitted to the Office of Graduate Studies Texas ASM University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1988 Major Subject: Meteorology INTERDIURNAL TEMPERATURE VARIABILITY OVER THE CONTERMINOUS UNITED STATES AND CANADA A Thesis by PETER BRUCE RICE Approved as to sty1e and content by: Dennis M. Drisco11 (Chair...

  5. Explaining finite state machine characteristics using variable structure control

    SciTech Connect (OSTI)

    Feddema, J.T.; Robinett, R.D.; Driessen, B.J.

    1997-10-01T23:59:59.000Z

    This paper describes how variable structure control can be used to describe the overall behavior of multiple autonomous robotic vehicles with simple finite state machine rules. The importance of this result is that it allows for the design of provably asymptotically stable group behaviors from a set of simple control laws and appropriate switching points with variable structure control. The ability to prove convergence to a goal is especially important for applications such as locating military targets or land mines.

  6. Variable Renewable Energy: a Regulatory Roadmap (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-10-01T23:59:59.000Z

    There is not a one-size-fits-all approach to the regulation of variable renewable energy (VRE), but international experience reveals many approaches that are proving successful. Drawing upon research and experiences from various international contexts, the 21st Century Power Partnership in conjunction with the Clean Energy Solutions Center and Clean Energy Regulators Initiative identified key issues and ideas that have emerged as variable deployment has grown. The Power Partnership research, published in 2014, identified four broad categories of regulatory issues.

  7. Coefficient quantization effects in block state variable digital filters 

    E-Print Network [OSTI]

    Lee, Kab Joo

    1991-01-01T23:59:59.000Z

    COEFFICIENT QUANTIZATION EFFECTS IN BLOCK STATE VARIABLE DIGITAL FILTERS A Thesis by KAB JOO LEE Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE August 1991 Major Subject: Electrical Engineering COEFFICIENT QIJANTIZATIOU EFFECTS IN l3LOCI~ STATE VARIABLE DIGITAL FILTERS A Thesis hs IiAB JOO LEE Approved as to style and content by: WVilliam G. )3liss (Chair of Comnaittee) Norman C...

  8. Coefficient quantization effects in block state variable digital filters

    E-Print Network [OSTI]

    Lee, Kab Joo

    1991-01-01T23:59:59.000Z

    COEFFICIENT QUANTIZATION EFFECTS IN BLOCK STATE VARIABLE DIGITAL FILTERS A Thesis by KAB JOO LEE Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE August 1991 Major Subject: Electrical Engineering COEFFICIENT QIJANTIZATIOU EFFECTS IN l3LOCI~ STATE VARIABLE DIGITAL FILTERS A Thesis hs IiAB JOO LEE Approved as to style and content by: WVilliam G. )3liss (Chair of Comnaittee) Norman C...

  9. A nuclear wind/solar oil-shale system for variable electricity and liquid fuels production

    SciTech Connect (OSTI)

    Forsberg, C. [Massachusetts Inst. of Technology, 77 Massachusetts Ave., Cambridge, MA 012139 (United States)

    2012-07-01T23:59:59.000Z

    The recoverable reserves of oil shale in the United States exceed the total quantity of oil produced to date worldwide. Oil shale contains no oil, rather it contains kerogen which when heated decomposes into oil, gases, and a carbon char. The energy required to heat the kerogen-containing rock to produce the oil is about a quarter of the energy value of the recovered products. If fossil fuels are burned to supply this energy, the greenhouse gas releases are large relative to producing gasoline and diesel from crude oil. The oil shale can be heated underground with steam from nuclear reactors leaving the carbon char underground - a form of carbon sequestration. Because the thermal conductivity of the oil shale is low, the heating process takes months to years. This process characteristic in a system where the reactor dominates the capital costs creates the option to operate the nuclear reactor at base load while providing variable electricity to meet peak electricity demand and heat for the shale oil at times of low electricity demand. This, in turn, may enable the large scale use of renewables such as wind and solar for electricity production because the base-load nuclear plants can provide lower-cost variable backup electricity. Nuclear shale oil may reduce the greenhouse gas releases from using gasoline and diesel in half relative to gasoline and diesel produced from conventional oil. The variable electricity replaces electricity that would have been produced by fossil plants. The carbon credits from replacing fossil fuels for variable electricity production, if assigned to shale oil production, results in a carbon footprint from burning gasoline or diesel from shale oil that may half that of conventional crude oil. The U.S. imports about 10 million barrels of oil per day at a cost of a billion dollars per day. It would require about 200 GW of high-temperature nuclear heat to recover this quantity of shale oil - about two-thirds the thermal output of existing nuclear reactors in the United States. With the added variable electricity production to enable renewables, additional nuclear capacity would be required. (authors)

  10. Measurement and modeling of advanced coal conversion processes, Volume III

    SciTech Connect (OSTI)

    Ghani, M.U.; Hobbs, M.L.; Hamblen, D.G. [and others

    1993-08-01T23:59:59.000Z

    A generalized one-dimensional, heterogeneous, steady-state, fixed-bed model for coal gasification and combustion is presented. The model, FBED-1, is a design and analysis tool that can be used to simulate a variety of gasification, devolatilization, and combustion processes. The model considers separate gas and solid temperatures, axially variable solid and gas flow rates, variable bed void fraction, coal drying, devolatilization based on chemical functional group composition, depolymerization, vaporization and crosslinking, oxidation, and gasification of char, and partial equilibrium in the gas phase.

  11. HYDROLOGICAL PROCESSES Hydrol. Process. (in press)

    E-Print Network [OSTI]

    McKenzie, Jeffrey M.

    of an investigation on the processes controlling heat transport in peat under a large bog in the Glacial Lake Agassiz cm within a vertical peat profile at the crest of the bog at sub-daily intervals. We also recorded air temperature 1 m above the peat surface. We calculate a peat thermal conductivity of 0Ð5 W m 1 °C 1

  12. HYDROLOGICAL PROCESSES Hydrol. Process. 21, 369378 (2007)

    E-Print Network [OSTI]

    Long, Bernard

    2007-01-01T23:59:59.000Z

    report the results of an investigation on the processes controlling heat transport in peat under a large at 12 depth intervals from 0 to 400 cm within a vertical peat profile at the crest of the bog at sub-daily intervals. We also recorded air temperature 1 m above the peat surface. We calculate a peat thermal

  13. Future Steelmaking Processes

    SciTech Connect (OSTI)

    Prof. R. J. Fruehan

    2004-09-20T23:59:59.000Z

    There is an increasing demand for an ironmaking process with lower capital cost, energy consumption and emissions than a blast furnace. It is the hypothesis of the present work that an optimized combination of two reasonable proven technologies will greatly enhance the overall process. An example is a rotary hearth furnace (RHF) linked to a smelter (e.g., AISI, HIsmelt). The objective of this research is to select promising process combinations, develop energy, materials balance and productivity models for the individual processes, conduct a limited amount of basic research on the processes and evaluate the process combinations. Three process combinations were selected with input from the industrial partners. The energy-materials and productivity models for the RHF, smelter, submerged arc furnace and CIRCOFER were developed. Since utilization of volatiles in coal is critical for energy and CO{sub 2} emission reduction, basic research on this topic was also conducted. The process models developed are a major product developed in this research. These models can be used for process evaluation by the industry. The process combinations of an RHF-Smelter and a simplified CIRCOFER-Smelter appear to be promising. Energy consumption is reduced and productivity increased. Work on this project is continuing using funds from other sources.

  14. Microwave processing of tantalum capacitor anodes

    SciTech Connect (OSTI)

    Lauf, R J; Hamby, C; Holcombe, C E [Oak Ridge National Lab., TN (United States)] [Oak Ridge National Lab., TN (United States); Vierow, W F [AVX Tantalum Corp., Biddeford, ME (United States)] [AVX Tantalum Corp., Biddeford, ME (United States)

    1992-08-01T23:59:59.000Z

    Porous tantalum anodes were sintered at temperatures from 1600 to 1900{degrees}C using a conventional high-vacuum furnace as well as both 2.45 GHz fixed-frequency and 4--8 GHz variable-frequency microwave furnaces. Various insulation and casketing techniques were used to couple the microwave power to the tantalum compacts. Several types of tantalum powder were used to assess the effect of microwave processing on sintered surface area and impurity levels. Some microwave sintered anodes have an unusual surface rippling not seen on conventionally fired parts. The rippling suggests that a microscopic arcing or plasma might have been generated. Two important effects could be exploited if this phenomenon can be controlled. First, the effective tantalum surface area could be increased, yielding higher capacitance per volume. Second, surface impurities might be cleaned away, allowing the formation of a better dielectric film during the anodization process and, ultimately, higher working voltage.

  15. Processing and properties of superconductor wires

    SciTech Connect (OSTI)

    Singh, J.P.; Dorris, S.E.; Lanagan, M.T.; Wu, C.T.; Goretta, K.C.; Joo, J.; Balachandran, U.; Poeppel, R.B.

    1991-10-01T23:59:59.000Z

    Variables in fabrication of superconductor wires by extrusion and by powder-in-tube processing are discussed. Decomposition of plastically extruded YBCO is minimized by firing at reduced total pressure. Extruded wires of YBCO were densified with fine-grained microstructures by sintering at an oxygen partial pressure of 10{sup {minus}3} MPa. A reduction in average grain size from 23 to 4 {mu}m increased strength from 83 to 191 MPa. Addition of 15 vol. % Ag particles further increased the strength to 220 MPa, with the increase resulting from compressive stresses in YBCO matrix due to the Ag. In powder-in-tube processing, primary considerations are the mechanical-working and heating schedules. The best properties in Ag-clad Bi-based superconductors were obtained with many small reductions during working and by use of liquid-phase formation during sintering to promote grain growth. 12 refs., 3 figs., 1 tab.

  16. Personality as a Moderating Variable Between Loss of Relationship and Subjective Well-Being in College Students

    E-Print Network [OSTI]

    Smith, Amanda Artell

    2010-10-12T23:59:59.000Z

    , Michael Duffy Committee Members, Daniel Brossart Arnold LeUnes Anita McCormick Head of Department, Victor Willson August 2010 Major Subject: Counseling Psychology iii ABSTRACT Personality as a Moderating Variable Between Loss... appreciation to my doctoral committee: Michael Duffy, Daniel Brossart, Anita McCormick, and Arnold LeUnes. Your continued support has meant a lot to me as I went through this process. I appreciate all the time and effort that was contributed...

  17. Evaluation of feeds for melt and dilute process using an analytical hierarchy process

    SciTech Connect (OSTI)

    Krupa, J.F.

    2000-03-22T23:59:59.000Z

    Westinghouse Savannah River Company was requested to evaluate whether nuclear materials other than aluminum-clad spent nuclear fuel should be considered for treatment to prepare them for disposal in the melt and dilute facility as part of the Treatment and Storage Facility currently projected for construction in the L-Reactor process area. The decision analysis process used to develop this analysis considered many variables and uncertainties, including repository requirements that are not yet finalized. The Analytical Hierarchy Process using a ratings methodology was used to rank potential feed candidates for disposition through the Melt and Dilute facility proposed for disposition of Savannah River Site aluminum-clad spent nuclear fuel. Because of the scoping nature of this analysis, the expert team convened for this purpose concentrated on technical feasibility and potential cost impacts associated with using melt and dilute versus the current disposition option. This report documents results of the decision analysis.

  18. The Chemical Compositions of the Type II Cepheids -- The BL Her and W Vir Variables

    E-Print Network [OSTI]

    Thomas Maas; Sunetra Giridhar; David L. Lambert

    2007-06-14T23:59:59.000Z

    Abundance analyses from high-resolution optical spectra are presented for 19 Type II Cepheids in the Galactic field. The sample includes both short-period (BL Her) and long-period (W Vir) stars. This is the first extensive abundance analysis of these variables. The C, N, and O abundances with similar spreads for the BL Her and W Vir show evidence for an atmosphere contaminated with $3\\alpha$-process and CN-cycling products. A notable anomaly of the BL Her stars is an overabundance of Na by a factor of about five relative to their presumed initial abundances. This overabundance is not seen in the W Vir stars. The abundance anomalies running from mild to extreme in W Vir stars but not seen in the BL Her stars are attributed to dust-gas separation that provides an atmosphere deficient in elements of high condensation temperature, notably Al, Ca, Sc, Ti, and $s$-process elements. Such anomalies have previously been seen among RV Tau stars which represent a long-period extension of the variability enjoyed by the Type II Cepheids. Comments are offered on how the contrasting abundance anomalies of BL Her and W Vir stars may be explained in terms of the stars' evolution from the blue horizontal branch.

  19. Metal enrichment processes

    E-Print Network [OSTI]

    S. Schindler; A. Diaferio

    2008-01-07T23:59:59.000Z

    There are many processes that can transport gas from the galaxies to their environment and enrich the environment in this way with metals. These metal enrichment processes have a large influence on the evolution of both the galaxies and their environment. Various processes can contribute to the gas transfer: ram-pressure stripping, galactic winds, AGN outflows, galaxy-galaxy interactions and others. We review their observational evidence, corresponding simulations, their efficiencies, and their time scales as far as they are known to date. It seems that all processes can contribute to the enrichment. There is not a single process that always dominates the enrichment, because the efficiencies of the processes vary strongly with galaxy and environmental properties.

  20. Asymptotic equivalence of jumps Lvy processes and their discrete counterpart Pierre tora

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Asymptotic equivalence of jumps Lévy processes and their discrete counterpart Pierre Étoréa , Sana.Mariucci@imag.fr Abstract We establish the global asymptotic equivalence between a pure jumps Lévy process {Xt} on the time Poisson independent random variables with parameters linked with the Lévy measure . The equivalence result

  1. Statistical post processing of model output from the air quality model LOTOS-EUROS

    E-Print Network [OSTI]

    Stoffelen, Ad

    are calculated with R, a language for statistical computing. The routine STEP in R is used to remove variablesStatistical post processing of model output from the air quality model LOTOS-EUROS Annemiek Pijnappel De Bilt, 2011 | Stageverslag #12;#12;Statistical post processing of model output from the air

  2. Dry Process Electrode Fabrication

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

    with good mechanical properties - Loading approaching targets - Process parameter optimization necessary to make thinner films with better density characteristics Images of dry...

  3. Industrial process surveillance system

    DOE Patents [OSTI]

    Gross, K.C.; Wegerich, S.W.; Singer, R.M.; Mott, J.E.

    1998-06-09T23:59:59.000Z

    A system and method are disclosed for monitoring an industrial process and/or industrial data source. The system includes generating time varying data from industrial data sources, processing the data to obtain time correlation of the data, determining the range of data, determining learned states of normal operation and using these states to generate expected values, comparing the expected values to current actual values to identify a current state of the process closest to a learned, normal state; generating a set of modeled data, and processing the modeled data to identify a data pattern and generating an alarm upon detecting a deviation from normalcy. 96 figs.

  4. EMSL - Energy Materials & Processes

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

    energy Energy Materials and Processes focuses on the dynamic transformation mechanisms and physical and chemical properties at critical interfaces in catalysts and energy materials...

  5. Robust Markov Decision Processes

    E-Print Network [OSTI]

    2012-02-09T23:59:59.000Z

    Probability and Measure. Wiley Blackwell, 1995. [8] E. Delage and S. Mannor. Percentile optimization for Markov decision processes with parameter uncertainty

  6. Living olefin polymerization processes

    DOE Patents [OSTI]

    Schrock, Richard R.; Bauman, Robert

    2006-11-14T23:59:59.000Z

    Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the metal atom through two anionic or covalent bonds and a dative bond. The initiators are particularly stable under reaction conditions in the absence of olefin monomer. The processes provide polymers having low polydispersities, especially block copolymers having low polydispersities. It is an additional advantage of these processes that, during block copolymer synthesis, a relatively small amount of homopolymer is formed.

  7. Fuel Processing Valri Lightner

    E-Print Network [OSTI]

    · Catalysts for Autothermal Reforming · Water-Gas-Shift Membrane Reactor · Hydrogen Enhancement #12;Fuel Applications · Fuel Cell Distributed Power Package Unit: Fuel Processing Based on Autothermal Cyclic Reforming

  8. Rare muon processes

    SciTech Connect (OSTI)

    Cooper, M.D.; The MEGA Collaboration

    1993-05-01T23:59:59.000Z

    The status of rare muon processes as tests of the standard model is reviewed with the emphasis on results that are expected from experiments in the near future.

  9. Rare muon processes

    SciTech Connect (OSTI)

    Cooper, M.D.

    1993-01-01T23:59:59.000Z

    The status of rare muon processes as tests of the standard model is reviewed with the emphasis on results that are expected from experiments in the near future.

  10. Fast PCA and Bayesian Variable Selection for Large Data Sets Based on SQL and UDFs

    E-Print Network [OSTI]

    Ordonez, Carlos

    analysis (PCA) and stochastic search variable selection (SSVS) that can work en- tirely inside a DBMS search variable selection (SSVS) evaluatesFast PCA and Bayesian Variable Selection for Large Data Sets Based on SQL and UDFs Mario Navas

  11. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    Lave et al. A Wavelet-based Variability Model (WVM)for Solar PV Powerplants A Wavelet-based Variability Model (Joshua S. Stein Abstract – A wavelet variability model (WVM)

  12. Mass Market Demand Response and Variable Generation Integration Issues: A Scoping Study

    E-Print Network [OSTI]

    Cappers, Peter

    2012-01-01T23:59:59.000Z

    Smart Grid, and specifically AMI, can play in mitigating variable generation integrationSmart Grid could be the “silver bullet” for mitigating variable generation integrationSmart Grid could be the “silver bullet” for mitigating variable generation integration

  13. Parameter estimation of quantum processes using convex optimization

    E-Print Network [OSTI]

    Gábor Balló; Katalin M. Hangos

    2010-04-29T23:59:59.000Z

    A convex optimization based method is proposed for quantum process tomography, in the case of known channel model structure, but unknown channel parameters. The main idea is to select an affine parametrization of the Choi matrix as a set of optimization variables, and formulate a semidefinite programming problem with a least squares objective function. Possible convex relations between the optimization variables are also taken into account to improve the estimation. Simulation case studies show, that the proposed method can significantly increase the accuracy of the parameter estimation, if the channel model structure is known. Beside the convex part, the determination of the channel parameters from the optimization variables is a nonconvex step in general. In the case of Pauli channels however, the method reduces to a purely convex optimization problem, allowing to obtain a globally optimal solution.

  14. Business Process Modeling for developing Process Oriented IT Systems Track: Business Process Management Tools and Technologies

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Business Process Modeling for developing Process Oriented IT Systems Track: Business Process should be like. Therefore, business process modeling becomes a pre-requisite for system requirements, the paradigm of Business Process Management contrasts with traditional information system development, which

  15. Chemical process hazards analysis

    SciTech Connect (OSTI)

    NONE

    1996-02-01T23:59:59.000Z

    The Office of Worker Health and Safety (EH-5) under the Assistant Secretary for the Environment, Safety and Health of the US Department (DOE) has published two handbooks for use by DOE contractors managing facilities and processes covered by the Occupational Safety and Health Administration (OSHA) Rule for Process Safety Management of Highly Hazardous Chemicals (29 CFR 1910.119), herein referred to as the PSM Rule. The PSM Rule contains an integrated set of chemical process safety management elements designed to prevent chemical releases that can lead to catastrophic fires, explosions, or toxic exposures. The purpose of the two handbooks, ``Process Safety Management for Highly Hazardous Chemicals`` and ``Chemical Process Hazards Analysis,`` is to facilitate implementation of the provisions of the PSM Rule within the DOE. The purpose of this handbook ``Chemical Process Hazards Analysis,`` is to facilitate, within the DOE, the performance of chemical process hazards analyses (PrHAs) as required under the PSM Rule. It provides basic information for the performance of PrHAs, and should not be considered a complete resource on PrHA methods. Likewise, to determine if a facility is covered by the PSM rule, the reader should refer to the handbook, ``Process Safety Management for Highly Hazardous Chemicals`` (DOE- HDBK-1101-96). Promulgation of the PSM Rule has heightened the awareness of chemical safety management issues within the DOE. This handbook is intended for use by DOE facilities and processes covered by the PSM rule to facilitate contractor implementation of the PrHA element of the PSM Rule. However, contractors whose facilities and processes not covered by the PSM Rule may also use this handbook as a basis for conducting process hazards analyses as part of their good management practices. This handbook explains the minimum requirements for PrHAs outlined in the PSM Rule. Nowhere have requirements been added beyond what is specifically required by the rule.

  16. A PHOTOMETRICALLY AND MORPHOLOGICALLY VARIABLE INFRARED NEBULA IN L483

    SciTech Connect (OSTI)

    Connelley, Michael S. [NASA Ames Research Center, MS 245-6, Moffett Field, CA 94035 (United States); Hodapp, Klaus W. [University of Hawaii Institute for Astronomy, 640 N. Aohoku Pl., Hilo, HI 96720 (United States); Fuller, Gary A. [Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, Manchester, M13 9PL (United Kingdom)

    2009-03-15T23:59:59.000Z

    We present narrow and broad K-band observations of the Class 0/I source IRAS 18148-0440 that span 17 years. The infrared nebula associated with this protostar in the L483 dark cloud is both morphologically and photometrically variable on a timescale of only a few months. This nebula appears to be an infrared analog to other well known optically visible variable nebulae associated with young stars, such as Hubble's Variable Nebula. Along with Cepheus A, this is one of the first large variable nebulae to be found that is only visible in the infrared. The variability of this nebula is most likely due to changing illumination of the cloud rather than any motion of the structure in the nebula. Both morphological and photometric changes are observed on a timescale only a few times longer than the light crossing time of the nebula, suggesting very rapid intrinsic changes in the illumination of the nebula. Our narrowband observations also found that H{sub 2} knots are found nearly twice as far to the east of the source as to its west, and that H{sub 2} emission extends farther east of the source than the previously known CO outflow.

  17. Variable stars in the globular cluster M28 (NGC 6626)

    E-Print Network [OSTI]

    Prieto, G; Ramos, R Contreras; Pritzl, B J; Smith, H A; Alonso-Garcia, J

    2012-01-01T23:59:59.000Z

    We present a new search for variable stars in the Galactic globular cluster M28 (NGC 6626). The search is based on a series of BVI images obtained with the SMARTS Consortium's 1.3m telescope at Cerro Tololo Inter-American Observatory, Chile. The search was carried out using the ISIS v2.2 image subtraction package. We find a total of 25 variable stars in the field of the cluster, 9 being new discoveries. Of the newly found variables, 1 is an ab-type RR Lyrae star, 6 are c-type RR Lyrae, and 2 are long-period/semi-regular variables. V22, previously classified as a type II Cepheid, appears as a bona-fide RRc in our data. In turn, V20, previously classified as an ab-type RR Lyrae, could not be properly phased with any reasonable period. The properties of the ab-type RR Lyrae stars in M28 appear most consistent with an Oosterhoff-intermediate classification, which is unusual for bona-fide Galactic globulars clusters. However, the cluster's c-type variables do not clearly support such an Oosterhoff type, and a hybr...

  18. Superconducting fault current-limiter with variable shunt impedance

    DOE Patents [OSTI]

    Llambes, Juan Carlos H; Xiong, Xuming

    2013-11-19T23:59:59.000Z

    A superconducting fault current-limiter is provided, including a superconducting element configured to resistively or inductively limit a fault current, and one or more variable-impedance shunts electrically coupled in parallel with the superconducting element. The variable-impedance shunt(s) is configured to present a first impedance during a superconducting state of the superconducting element and a second impedance during a normal resistive state of the superconducting element. The superconducting element transitions from the superconducting state to the normal resistive state responsive to the fault current, and responsive thereto, the variable-impedance shunt(s) transitions from the first to the second impedance. The second impedance of the variable-impedance shunt(s) is a lower impedance than the first impedance, which facilitates current flow through the variable-impedance shunt(s) during a recovery transition of the superconducting element from the normal resistive state to the superconducting state, and thus, facilitates recovery of the superconducting element under load.

  19. Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems

    E-Print Network [OSTI]

    Hong, Tainzhen

    2010-01-01T23:59:59.000Z

    Comparison of energy efficiency between variable refrigeranttheir superior energy efficiency. The variable refrigerantfew studies reporting the energy efficiency of VRF systems

  20. Analyzing and simulating the variability of solar irradiance and solar PV powerplants

    E-Print Network [OSTI]

    Lave, Matthew S.

    2012-01-01T23:59:59.000Z

    Analysis of Distributed PV, American Solar Energy Society,Simulating the Reduction in PV Powerplant Variability due to8] T. Hoff, R. Perez, Modeling PV Fleet Output Variability,

  1. Effect of ocean mesoscale variability on the mean state of tropical Atlantic climate

    E-Print Network [OSTI]

    Seo, H; Jochum, M; Murtugudde, R; Miller, A J

    2006-01-01T23:59:59.000Z

    Effect of Ocean Mesoscale Variability on the Mean State ofthe effect of oceanic mesoscale features on the mean climatemodel, resolving oceanic mesoscale variability leads to a

  2. Microsystem process networks

    DOE Patents [OSTI]

    Wegeng, Robert S. (Richland, WA); TeGrotenhuis, Ward E. (Kennewick, WA); Whyatt, Greg A. (West Richland, WA)

    2007-09-18T23:59:59.000Z

    Various aspects and applications of microsystem process networks are described. The design of many types of Microsystems can be improved by ortho-cascading mass, heat, or other unit process operations. Microsystems having energetically efficient microchannel heat exchangers are also described. Detailed descriptions of numerous design features in microcomponent systems are also provided.

  3. Microsystem process networks

    DOE Patents [OSTI]

    Wegeng, Robert S. (Richland, WA); TeGrotenhuis, Ward E. (Kennewick, WA); Whyatt, Greg A. (West Richland, WA)

    2006-10-24T23:59:59.000Z

    Various aspects and applications of microsystem process networks are described. The design of many types of microsystems can be improved by ortho-cascading mass, heat, or other unit process operations. Microsystems having exergetically efficient microchannel heat exchangers are also described. Detailed descriptions of numerous design features in microcomponent systems are also provided.

  4. Microsystem process networks

    DOE Patents [OSTI]

    Wegeng, Robert S [Richland, WA; TeGrotenhuis, Ward E [Kennewick, WA; Whyatt, Greg A [West Richland, WA

    2010-01-26T23:59:59.000Z

    Various aspects and applications or microsystem process networks are described. The design of many types of microsystems can be improved by ortho-cascading mass, heat, or other unit process operations. Microsystems having energetically efficient microchannel heat exchangers are also described. Detailed descriptions of numerous design features in microcomponent systems are also provided.

  5. Cooking with Processed Cheese

    E-Print Network [OSTI]

    Anding, Jenna

    2008-12-09T23:59:59.000Z

    processed cheese. It can be sliced and placed on a cracker, on a hamburger or on bread to make a grilled cheese sandwich. You can also add shredded cheese to scrambled eggs and casseroles. How to store it For best taste, store processed American cheese...

  6. Associative list processing unit

    DOE Patents [OSTI]

    Hemmert, Karl Scott; Underwood, Keith D.

    2013-01-29T23:59:59.000Z

    An associative list processing unit and method comprising employing a plurality of prioritized cell blocks and permitting inserts to occur in a single clock cycle if all of the cell blocks are not full. Also, an associative list processing unit and method comprising employing a plurality of prioritized cell blocks and using a tree of prioritized multiplexers descending from the plurality of cell blocks.

  7. Hepa filter dissolution process

    DOE Patents [OSTI]

    Brewer, Ken N. (Arco, ID); Murphy, James A. (Idaho Falls, ID)

    1994-01-01T23:59:59.000Z

    A process for dissolution of spent high efficiency particulate air (HEPA) filters and then combining the complexed filter solution with other radioactive wastes prior to calcining the mixed and blended waste feed. The process is an alternate to a prior method of acid leaching the spent filters which is an inefficient method of treating spent HEPA filters for disposal.

  8. Inventory processes: Quasiregenerative property,

    E-Print Network [OSTI]

    Rubinstein, Reuven

    Inventory processes: Quasi­regenerative property, performance evaluation and sensitivity estimation­commodity, discrete­time, multiperiod (s; S)­ policy inventory model with backlog. The cost function may contain that the resulting inventory process is quasi­regenerative, i.e. admits a cycle decomposition and indicate how

  9. PHOTOSYNTHESIS AND RELATED PROCESSES

    E-Print Network [OSTI]

    Govindjee

    #12;#12;#12;#12;PHOTOSYNTHESIS AND RELATED PROCESSES VOLUME II Part 2 #12;« '«;- py as- b^ Section Research, 7, 288, 1954). #12;PHOTOSYNTHESIS nnd Related Processes By EUGENE I. RABINOWITCH Research Professor, Photosynthesis Research Labora- tory, Department of Botany, University of Illinois. Formerly

  10. HEPA filter dissolution process

    DOE Patents [OSTI]

    Brewer, K.N.; Murphy, J.A.

    1994-02-22T23:59:59.000Z

    A process is described for dissolution of spent high efficiency particulate air (HEPA) filters and then combining the complexed filter solution with other radioactive wastes prior to calcining the mixed and blended waste feed. The process is an alternate to a prior method of acid leaching the spent filters which is an inefficient method of treating spent HEPA filters for disposal. 4 figures.

  11. Contaminated nickel scrap processing

    SciTech Connect (OSTI)

    Compere, A.L.; Griffith, W.L.; Hayden, H.W.; Johnson, J.S. Jr.; Wilson, D.F.

    1994-12-01T23:59:59.000Z

    The DOE will soon choose between treating contaminated nickel scrap as a legacy waste and developing high-volume nickel decontamination processes. In addition to reducing the volume of legacy wastes, a decontamination process could make 200,000 tons of this strategic metal available for domestic use. Contaminants in DOE nickel scrap include {sup 234}Th, {sup 234}Pa, {sup 137}Cs, {sup 239}Pu (trace), {sup 60}Co, U, {sup 99}Tc, and {sup 237}Np (trace). This report reviews several industrial-scale processes -- electrorefining, electrowinning, vapormetallurgy, and leaching -- used for the purification of nickel. Conventional nickel electrolysis processes are particularly attractive because they use side-stream purification of process solutions to improve the purity of nickel metal. Additionally, nickel purification by electrolysis is effective in a variety of electrolyte systems, including sulfate, chloride, and nitrate. Conventional electrorefining processes typically use a mixed electrolyte which includes sulfate, chloride, and borate. The use of an electrorefining or electrowinning system for scrap nickel recovery could be combined effectively with a variety of processes, including cementation, solvent extraction, ion exchange, complex-formation, and surface sorption, developed for uranium and transuranic purification. Selected processes were reviewed and evaluated for use in nickel side-stream purification. 80 refs.

  12. Elemental sulfur recovery process

    DOE Patents [OSTI]

    Flytzani-Stephanopoulos, M.; Zhicheng Hu.

    1993-09-07T23:59:59.000Z

    An improved catalytic reduction process for the direct recovery of elemental sulfur from various SO[sub 2]-containing industrial gas streams. The catalytic process provides combined high activity and selectivity for the reduction of SO[sub 2] to elemental sulfur product with carbon monoxide or other reducing gases. The reaction of sulfur dioxide and reducing gas takes place over certain catalyst formulations based on cerium oxide. The process is a single-stage, catalytic sulfur recovery process in conjunction with regenerators, such as those used in dry, regenerative flue gas desulfurization or other processes, involving direct reduction of the SO[sub 2] in the regenerator off gas stream to elemental sulfur in the presence of a catalyst. 4 figures.

  13. Integration of Variable Generation and Cost-Causation (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-09-01T23:59:59.000Z

    Variable renewable energy generation sources, such as wind and solar energy, provide benefits such as reduced environmental impact, zero fuel consumption, and low and stable costs. Advances in both technologies can reduce capital costs and provide significant control capabilities. However, their variability and uncertainty - which change with weather conditions, time of day, and season - can cause an increase in power system operating costs compared to a fully controllable power plant. Although a number of studies have assessed integration costs, calculating them correctly is challenging because it is difficult to accurately develop a baseline scenario without variable generation that properly accounts for the energy value. It is also difficult to appropriately allocate costs given the complex, nonlinear interactions between resources and loads.

  14. Quantum simulation of quantum field theory using continuous variables

    E-Print Network [OSTI]

    Kevin Marshall; Raphael Pooser; George Siopsis; Christian Weedbrook

    2015-03-27T23:59:59.000Z

    Much progress has been made in the field of quantum computing using continuous variables over the last couple of years. This includes the generation of extremely large entangled cluster states (10,000 modes, in fact) as well as a fault tolerant architecture. This has led to the point that continuous-variable quantum computing can indeed be thought of as a viable alternative for universal quantum computing. With that in mind, we present a new algorithm for continuous-variable quantum computers which gives an exponential speedup over the best known classical methods. Specifically, this relates to efficiently calculating the scattering amplitudes in scalar bosonic quantum field theory, a problem that is believed to be hard using a classical computer. Building on this, we give an experimental implementation based on cluster states that is feasible with today's technology.

  15. Removing the Microlensing Blending-Parallax Degeneracy Using Source Variability

    E-Print Network [OSTI]

    Assef, R J; Afonso, C; Albert, J N; Andersen, J; Ansari, R; Aubourg, E; Bareyre, P; Beaulieu, J P; Charlot, X; Coutures, C; Ferlet, R; Fouqué, P; Glicenstein, J F; Goldman, B; Graff, D; Gros, M; Haïssinski, J; Hamadache, C; De Kat, J; Le Guillou, Laurent; Lesquoy, E; Loup, C; Magneville, C; Marquette, J B; Maurice, E; Maury, A; Milsztajn, A; Moniez, M; Palanque-Delabrouille, Nathalie; Perdereau, O; Rahal, Y R; Rich, J; Spiro, M; Tisserand, P; Vidal-Madjar, A; Vigroux, L; Zylberajch, S; Bennett, D P; Becker, A C; Griest, K; Vandehei, T; Welch, D L; Udalski, A; Szymanski, M K; Kubiak, M; Pietrzynski, G; Soszynski, I; Szewczyk, O; Wyrzykowski, L

    2006-01-01T23:59:59.000Z

    Microlensing event MACHO 97-SMC-1 is one of the rare microlensing events for which the source is a variable star, simply because most variable stars are systematically eliminated from microlensing studies. Using observational data for this event, we show that the intrinsic variability of a microlensed star is a powerful tool to constrain the nature of the lens by breaking the degeneracy between the microlens parallax and the blended light. We also present a statistical test for discriminating the location of the lens based on the \\chi^2 contours of the vector \\Lambda, the inverse of the projected velocity. We find that while SMC self lensing is somewhat favored, neither location can be ruled out with good confidence.

  16. The role of an accretion disk in AGN variability

    E-Print Network [OSTI]

    B. Czerny

    2004-09-10T23:59:59.000Z

    Optically thick accretion disks are considered to be important ingredients of luminous AGN. The claim of their existence is well supported by observations and recent years brought some progress in understanding of their dynamics. However, the role of accretion disks in optical/UV/X-ray variability of AGN is not quite clear. Most probably, in short timescales the disk reprocesses the variable X-ray flux but at longer timescales the variations of the disk structure lead directly to optical/UV variations as well as affect, or even create, the X-ray variability pattern. We urgently need a considerable progress in time-dependent disk models to close the gap between the theory and the stream of data coming from the AGN monitoring.

  17. Observations of Antarctic Circumpolar Current dynamics in the Drake Passage and small-scale variability near the Antarctic Peninsula

    E-Print Network [OSTI]

    Lenn, Yueng Djern

    2006-01-01T23:59:59.000Z

    Mean Jets, Mesoscale Variability and Eddy Momentum Fluxes inlayer Mean Ve- locities and Mesoscale Variability in DrakeFiring, E. , 2006: Mean Jets, Mesoscale Variability and Eddy

  18. Implementing the DC Mode in Cosmological Simulations with Supercomoving Variables

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

    Gnedin, Nickolay Y.; Kravtsov, Andrey V.; Rudd, Douglas H.

    2011-06-02T23:59:59.000Z

    As emphasized by previous studies, proper treatment of the density fluctuation on the fundamental scale of a cosmological simulation volume - the 'DC mode' - is critical for accurate modeling of spatial correlations on scales ~> 10% of simulation box size. We provide further illustration of the effects of the DC mode on the abundance of halos in small boxes and show that it is straightforward to incorporate this mode in cosmological codes that use the 'supercomoving' variables. The equations governing evolution of dark matter and baryons recast with these variables are particularly simple and include the expansion factor, and hence the effect of the DC mode, explicitly only in the Poisson equation.

  19. On the near infrared variability of chemically peculiar stars

    E-Print Network [OSTI]

    F. A. Catalano; F. Leone

    1998-05-06T23:59:59.000Z

    Some CP stars have recently been discovered by Catalano et al. (1991) to be variable also in the near infrared, although with smaller amplitudes than in the visible. Hence an observational campaign was started in which the infrared light variability of a number of CP2 and CP4 stars has been investigated at the ESO-La Silla Observatory in the bands J, H, and K. As a general result, infrared variations show the same behavior in all three filters but amplitudes are smaller than in the visible.

  20. NREL Variability and Reserves Analysis for the Western Interconnect (Presentation)

    SciTech Connect (OSTI)

    Milligan, M.; King, J.

    2011-10-01T23:59:59.000Z

    Additional variability and uncertainty increase reserve requirements. In this light, this presentation discusses how use of generation reserves can be optimized for managing variability and uncertainty. Conclusions of this presentation are: (1) Provided a method for calculating additional reserve requirements due to wind and solar production; (2) Method is based on statistical analysis of historical time series data; (3) Reserves are dynamic, produced for each hour; (4) Reserve time series are calculated from and synchronized to simulation data; (5) PROMOD can not model directly, but workarounds exist for regulation and spin; and (6) Other production modeling packages have varying capability for reserves modeling.

  1. A class of orthogonal polynomials in two variables 

    E-Print Network [OSTI]

    Jones, Robert Allen

    1962-01-01T23:59:59.000Z

    . 18 I I LFi(xFiNDHE PRODUCT POLYNONIALS IN TNO VARIABL7S 34 2. 1 FUNDAPfENTAI TREORENS AND D'EFINITIONS. . 2. 2 CONVERSENCE PROP'ERTIFS ~ BIBLIOQH(l'RY 1 N T R 0 D TJ 0 T I 0 N The first chapter of this presentation will serve to develop some.... The second chapter has its founda*ions in the first. That is, many of' the properties oi' the orthogonal polynomials in *wo varia'blas can be developed from t be proper*i. es of the orthogonal polynomia3. s 1n one variable. In this presentation "interval...

  2. A Flexible Variable Truncated Power Series Algebra in Zlib

    SciTech Connect (OSTI)

    Yan, Y.T.; /SLAC

    2011-08-25T23:59:59.000Z

    Zlib is a numerical library for Truncated Power Series Algebra (TPSA) and Lie Algebra for application to nonlinear analysis of single particle dynamics. The first version was developed in 1990 with the use of the One-Step Index Pointers (OSIP's). The OSIP's form the Zlib nerve that offers optimal computation and alloworder grading as well as flexible initialization of the global number of variables for the TPSA. While the OSIP's are still kept for minimum index passing to achieve efficient computation, Zlib has been being upgraded to allow flexible and gradable local number of variables in each C++ object of the Truncated Power Series (Tps) class. Possible applications using Zlib are discussed.

  3. MEMS Fiber-Optic Variable Optical Attenuator using Collimating Lensed Fiber Che-Heung Kim, Jaehyoung Park, Namkyoo Park and Yong-Kweon Kim

    E-Print Network [OSTI]

    Park, Namkyoo

    ) Figure 1. Coupling schematic of lensed fibers (a) 3D model of VOA scheme (CODE V) (b) Estimated dynamic in DRIE process. The Figure 4 shows the coupling loss originated from tapered angle of mirror. A coupling variable optical attenuator using transnational 45degree tilted vertical mirror [1]. A couple of corn

  4. Gaia Data Processing Architecture

    E-Print Network [OSTI]

    W. O'Mullane; U. Lammers; C. Bailer-Jones; U. Bastian; A. Brown; R. Drimmel; L. Eyer; C. Huc; F. Jansen; D. Katz; L. Lindegren; D. Pourbaix; X. Luri; F. Mignard; J. Torra; F. van Leeuwen

    2006-11-29T23:59:59.000Z

    Gaia is ESA's ambitious space astrometry mission the main objective of which is to astrometrically and spectro-photometrically map 1000 Million celestial objects (mostly in our galaxy) with unprecedented accuracy. The announcement of opportunity for the data processing will be issued by ESA late in 2006. The Gaia Data Processing and Analysis Consortium (DPAC) has been formed recently and is preparing an answer. The satellite will downlink close to 100 TB of raw telemetry data over 5 years. To achieve its required accuracy of a few 10s of Microarcsecond astrometry, a highly involved processing of this data is required. In addition to the main astrometric instrument Gaia will host a Radial Velocity instrument, two low-resolution dispersers for multi-color photometry and two Star Mappers. Gaia is a flying Giga Pixel camera. The various instruments each require relatively complex processing while at the same time being interdependent. We describe the overall composition of the DPAC and the envisaged overall architecture of the Gaia data processing system. We shall delve further into the core processing - one of the nine, so-called, coordination units comprising the Gaia processing system.

  5. Computational modeling of materials processing and processes

    SciTech Connect (OSTI)

    Lowe, T.C.; Zhu, Yuntian; Bingert, J.F. [and others

    1998-12-31T23:59:59.000Z

    This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). Anisotropic mechanical properties of densified BSCCO powders are of paramount importance during thermo-mechanical processing of superconducting tapes and wires. Maximum current transport requires high relative density and a high degree of alignment of the single crystal planes of the BSCCO. Unfortunately this configuration causes high stresses that can lead to cracking, and thus reduce the density, and the conductive properties of the tape. The current work develops a micromechanical material mode to model is calibrated and compared to experimental results, and then employed to analyze the effects of initial texture and confinement pressure and shear strains in the core of oxide powder-in-tube (OPIT) processed tapes are calculated by finite-element analysis. The calculated deformations were then applied as boundary conditions to the micromechanical model. Our calculated results were used to interpret a set of prototypical rolling experiments. 11 refs., 5 figs.

  6. Coal liquefaction quenching process

    DOE Patents [OSTI]

    Thorogood, Robert M. (Macungie, PA); Yeh, Chung-Liang (Bethlehem, PA); Donath, Ernest E. (St. Croix, VI)

    1983-01-01T23:59:59.000Z

    There is described an improved coal liquefaction quenching process which prevents the formation of coke with a minimum reduction of thermal efficiency of the coal liquefaction process. In the process, the rapid cooling of the liquid/solid products of the coal liquefaction reaction is performed without the cooling of the associated vapor stream to thereby prevent formation of coke and the occurrence of retrograde reactions. The rapid cooling is achieved by recycling a subcooled portion of the liquid/solid mixture to the lower section of a phase separator that separates the vapor from the liquid/solid products leaving the coal reactor.

  7. Municipal waste processing apparatus

    DOE Patents [OSTI]

    Mayberry, J.L.

    1988-04-13T23:59:59.000Z

    This invention relates to apparatus for processing municipal waste, and more particularly to vibrating mesh screen conveyor systems for removing grit, glass, and other noncombustible materials from dry municipal waste. Municipal waste must be properly processed and disposed of so that it does not create health risks to the community. Generally, municipal waste, which may be collected in garbage trucks, dumpsters, or the like, is deposited in processing areas such as landfills. Land and environmental controls imposed on landfill operators by governmental bodies have increased in recent years, however, making landfill disposal of solid waste materials more expensive. 6 figs.

  8. Using Process Modeling for Process Understanding Dewayne E. Perry

    E-Print Network [OSTI]

    Perry, Dewayne E.

    Using Process Modeling for Process Understanding Dewayne E. Perry Systems and Software Research to improving processes is first understanding them. I report here a case study in process understanding using the process modeling language Interact. I illustrate both the language and the process iteratively, somewhat

  9. System for monitoring an industrial process and determining sensor status

    DOE Patents [OSTI]

    Gross, K.C.; Hoyer, K.K.; Humenik, K.E.

    1995-10-17T23:59:59.000Z

    A method and system for monitoring an industrial process and a sensor are disclosed. The method and system include generating a first and second signal characteristic of an industrial process variable. One of the signals can be an artificial signal generated by an auto regressive moving average technique. After obtaining two signals associated with one physical variable, a difference function is obtained by determining the arithmetic difference between the two pairs of signals over time. A frequency domain transformation is made of the difference function to obtain Fourier modes describing a composite function. A residual function is obtained by subtracting the composite function from the difference function and the residual function (free of nonwhite noise) is analyzed by a statistical probability ratio test. 17 figs.

  10. System for monitoring an industrial process and determining sensor status

    DOE Patents [OSTI]

    Gross, K.C.; Hoyer, K.K.; Humenik, K.E.

    1997-05-13T23:59:59.000Z

    A method and system are disclosed for monitoring an industrial process and a sensor. The method and system include generating a first and second signal characteristic of an industrial process variable. One of the signals can be an artificial signal generated by an auto regressive moving average technique. After obtaining two signals associated with one physical variable, a difference function is obtained by determining the arithmetic difference between the two pairs of signals over time. A frequency domain transformation is made of the difference function to obtain Fourier modes describing a composite function. A residual function is obtained by subtracting the composite function from the difference function and the residual function (free of nonwhite noise) is analyzed by a statistical probability ratio test. 17 figs.

  11. System for monitoring an industrial process and determining sensor status

    DOE Patents [OSTI]

    Gross, Kenneth C. (Bolingbrook, IL); Hoyer, Kristin K. (Chicago, IL); Humenik, Keith E. (Columbia, MD)

    1995-01-01T23:59:59.000Z

    A method and system for monitoring an industrial process and a sensor. The method and system include generating a first and second signal characteristic of an industrial process variable. One of the signals can be an artificial signal generated by an auto regressive moving average technique. After obtaining two signals associated with one physical variable, a difference function is obtained by determining the arithmetic difference between the two pairs of signals over time. A frequency domain transformation is made of the difference function to obtain Fourier modes describing a composite function. A residual function is obtained by subtracting the composite function from the difference function and the residual function (free of nonwhite noise) is analyzed by a statistical probability ratio test.

  12. System for monitoring an industrial process and determining sensor status

    DOE Patents [OSTI]

    Gross, Kenneth C. (Bolingbrook, IL); Hoyer, Kristin K. (Chicago, IL); Humenik, Keith E. (Columbia, MD)

    1997-01-01T23:59:59.000Z

    A method and system for monitoring an industrial process and a sensor. The method and system include generating a first and second signal characteristic of an industrial process variable. One of the signals can be an artificial signal generated by an auto regressive moving average technique. After obtaining two signals associated with one physical variable, a difference function is obtained by determining the arithmetic difference between the two pairs of signals over time. A frequency domain transformation is made of the difference function to obtain Fourier modes describing a composite function. A residual function is obtained by subtracting the composite function from the difference function and the residual function (free of nonwhite noise) is analyzed by a statistical probability ratio test.

  13. Method of and apparatus for thermomagnetically processing a workpiece

    DOE Patents [OSTI]

    Kisner, Roger A.; Rios, Orlando; Wilgen, John B.; Ludtka, Gerard M.; Ludtka, Gail M.

    2014-08-05T23:59:59.000Z

    A method of thermomagnetically processing a material includes disposing a workpiece within a bore of a magnet; exposing the workpiece to a magnetic field of at least about 1 Tesla generated by the magnet; and, while exposing the workpiece to the magnetic field, applying heat energy to the workpiece at a plurality of frequencies to achieve spatially-controlled heating of the workpiece. An apparatus for thermomagnetically processing a material comprises: a high field strength magnet having a bore extending therethrough for insertion of a workpiece therein; and an energy source disposed adjacent to an entrance to the bore. The energy source is an emitter of variable frequency heat energy, and the bore comprises a waveguide for propagation of the variable frequency heat energy from the energy source to the workpiece.

  14. Dry Process Electrode Fabrication

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

    Ratecapacity match cathode 12 8. Down-select low cost anode process 50% vs baseline capex + opex 13 9. Scale cathode film to support task 16 10 m 17 10. Lab prototype cell dry...

  15. Dry Process Electrode Fabrication

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

    capacity match cathode Oct. 14 8. Down-select low cost anode process 50% vs baseline capex + opex Dec. 14 9. Scale cathode film to support task 16 10 m Apr. 15 10. Lab prototype...

  16. Associative list processing unit

    DOE Patents [OSTI]

    Hemmert, Karl Scott; Underwood, Keith D

    2014-04-01T23:59:59.000Z

    An associative list processing unit and method comprising employing a plurality of prioritized cell blocks and permitting inserts to occur in a single clock cycle if all of the cell blocks are not full.

  17. Continuous sulfur removal process

    DOE Patents [OSTI]

    Jalan, V.; Ryu, J.

    1994-04-26T23:59:59.000Z

    A continuous process for the removal of hydrogen sulfide from a gas stream using a membrane comprising a metal oxide deposited on a porous support is disclosed. 4 figures.

  18. Fuel Processing Valri Lightner

    E-Print Network [OSTI]

    Fuel Processing Valri Lightner Energy Efficiency and Renewable Energy Hydrogen, Fuel Cells gasoline containing 30 ppm sulfur, average 807878%Energy efficiency · Key research partners ­ Nuvera, U Michigan, Catalytica, GE, UTRC, Ohio State U, Tiax, ANL, LANL, PNNL

  19. Physical process Mechanical mechanisms

    E-Print Network [OSTI]

    Berlin,Technische Universität

    1 Physical process Generation · Mechanical mechanisms F = m·a · Electric/Magnetic mechanisms F = B·i·l · Fluid dynamic/Hydraulic mechanisms q, p, ij · Thermal/Optical #12;2 Source unit

  20. Modeling of ultrasonic processing

    E-Print Network [OSTI]

    Zhao, Wenguang, S.M. Massachusetts Institute of Technology

    2005-01-01T23:59:59.000Z

    This paper presents a finite element analysis (FEA) of ultrasonic processing of an aerospace-grade carbon-epoxy composite laminate. An ultrasonic (approximately 30 kHz) loading horn is applied to a small region at the ...

  1. Direct coal liquefaction process

    DOE Patents [OSTI]

    Rindt, J.R.; Hetland, M.D.

    1993-10-26T23:59:59.000Z

    An improved multistep liquefaction process for organic carbonaceous mater which produces a virtually completely solvent-soluble carbonaceous liquid product. The solubilized product may be more amenable to further processing than liquid products produced by current methods. In the initial processing step, the finely divided organic carbonaceous material is treated with a hydrocarbonaceous pasting solvent containing from 10% and 100% by weight process-derived phenolic species at a temperature within the range of 300 C to 400 C for typically from 2 minutes to 120 minutes in the presence of a carbon monoxide reductant and an optional hydrogen sulfide reaction promoter in an amount ranging from 0 to 10% by weight of the moisture- and ash-free organic carbonaceous material fed to the system. As a result, hydrogen is generated via the water/gas shift reaction at a rate necessary to prevent condensation reactions. In a second step, the reaction product of the first step is hydrogenated.

  2. Sculpture as process

    E-Print Network [OSTI]

    Kracke, Bernd

    1981-01-01T23:59:59.000Z

    Sculpture as process is rooted in the historical development of movement as a theme of art in general and of sculpture in particular since 1900. The impact of the industrial revolution and the subsequent scientific/technological ...

  3. Coal liquefaction process

    DOE Patents [OSTI]

    Skinner, Ronald W. (Allentown, PA); Tao, John C. (Perkiomenville, PA); Znaimer, Samuel (Vancouver, CA)

    1985-01-01T23:59:59.000Z

    This invention relates to an improved process for the production of liquid carbonaceous fuels and solvents from carbonaceous solid fuels, especially coal. The claimed improved process includes the hydrocracking of the light SRC mixed with a suitable hydrocracker solvent. The recycle of the resulting hydrocracked product, after separation and distillation, is used to produce a solvent for the hydrocracking of the light solvent refined coal.

  4. Advanced Polymer Processing Facility

    SciTech Connect (OSTI)

    Muenchausen, Ross E. [Los Alamos National Laboratory

    2012-07-25T23:59:59.000Z

    Some conclusions of this presentation are: (1) Radiation-assisted nanotechnology applications will continue to grow; (2) The APPF will provide a unique focus for radiolytic processing of nanomaterials in support of DOE-DP, other DOE and advanced manufacturing initiatives; (3) {gamma}, X-ray, e-beam and ion beam processing will increasingly be applied for 'green' manufacturing of nanomaterials and nanocomposites; and (4) Biomedical science and engineering may ultimately be the biggest application area for radiation-assisted nanotechnology development.

  5. Hydrogen recovery process

    DOE Patents [OSTI]

    Baker, Richard W. (Palo Alto, CA); Lokhandwala, Kaaeid A. (Union City, CA); He, Zhenjie (Fremont, CA); Pinnau, Ingo (Palo Alto, CA)

    2000-01-01T23:59:59.000Z

    A treatment process for a hydrogen-containing off-gas stream from a refinery, petrochemical plant or the like. The process includes three separation steps: condensation, membrane separation and hydrocarbon fraction separation. The membrane separation step is characterized in that it is carried out under conditions at which the membrane exhibits a selectivity in favor of methane over hydrogen of at least about 2.5.

  6. Hydrocarbon conversion process

    SciTech Connect (OSTI)

    Buss, W.C.; Field, L.A.; Robinson, R.C.

    1984-06-26T23:59:59.000Z

    A hydrocarbon conversion process is disclosed having a very high selectivity for dehydrocyclization. In one aspect of this process, a hydrocarbon feed is subjected to hydrotreating, then the hydrocarbon feed is passed through a sulfur removal system which reduces the sulfur concentration of the hydrocarbon feed to below 500 ppb, and then the hydrocarbon feed is reformed over a dehydrocyclization catalyst comprising a large pore zeolite containing at least one Group VIII metal to produce aromatics and hydrogen.

  7. XXZ scalar products, Miwa variables and discrete KP

    E-Print Network [OSTI]

    O. Foda; G. Schrader

    2010-05-21T23:59:59.000Z

    We revisit the quantum/classical integrable model correspondence in the context of inhomogeneous finite length XXZ spin-1/2 chains with periodic boundary conditions and show that the Bethe scalar product of an arbitrary state and a Bethe eigenstate is a discrete KP tau-function. The continuous Miwa variables of discrete KP are the rapidities of the arbitrary state.

  8. Effects of simulated natural variability on Arctic temperature projections

    E-Print Network [OSTI]

    Drange, Helge

    - sea ice-ocean model is used to examine the effects of natural variability on climate projections starting from different strengths and phases of the Atlantic Meridional Overturning Circulation and cryosphere give rise to a variety of climate feedbacks as such as ice- albedo and cloud feedbacks. The direct

  9. 910 Hambright biomass. Instead, variability in the degree and

    E-Print Network [OSTI]

    Hambright, K. David

    #12;#12;#12;#12;#12;#12;#12;#12;#12;#12;#12;#12;#12;910 Hambright biomass. Instead, variability biomass. Various factors involved in the piscivore-planktivore interaction, such as gape limitation not change (Hunter and Price 1992;Strong 1992). Perhaps this resiliency to subtle external perturbations

  10. Performing local similarity searches with variable length seeds

    E-Print Network [OSTI]

    Csürös, Miklós

    Performing local similarity searches with variable length seeds Mikl´os Csur¨os D´epartement d manner. The algorithm uses a single parameter to control the speed of the similarity search there are many inventions that improve the speed of a full sensitivity search (e.g., [3]), a full-scale search

  11. Molecular Variables in the Self-Assembly of Supramolecular Nanostructures

    E-Print Network [OSTI]

    Braun, Paul

    for materials in order to understand some of the central issues in the creation of supramolecular materi- alsMolecular Variables in the Self-Assembly of Supramolecular Nanostructures Martin U. Pralle, Craig M. Whitaker, Paul V. Braun, and Samuel I. Stupp* Department of Materials Science and Engineering, Department

  12. Variable-energy drift-tube linear accelerator

    DOE Patents [OSTI]

    Swenson, Donald A. (Los Alamos, NM); Boyd, Jr., Thomas J. (Los Alamos, NM); Potter, James M. (Los Alamos, NM); Stovall, James E. (Los Alamos, NM)

    1984-01-01T23:59:59.000Z

    A linear accelerator system includes a plurality of post-coupled drift-tubes wherein each post coupler is bistably positionable to either of two positions which result in different field distributions. With binary control over a plurality of post couplers, a significant accumlative effect in the resulting field distribution is achieved yielding a variable-energy drift-tube linear accelerator.

  13. Cartel Pricing Dynamics with Cost Variability and Endogenous Buyer Detection

    E-Print Network [OSTI]

    Niebur, Ernst

    Cartel Pricing Dynamics with Cost Variability and Endogenous Buyer Detection Joseph E. Harrington to cost shocks. During the stationary phase, price responds to cost but is much less sensitive than under of cost shocks. It is also shown that the cartel price path may overshoot its long-run level so that price

  14. Methods for Learning Control Policies from Variable-Constraint

    E-Print Network [OSTI]

    Vijayakumar, Sethu

    , we explore the problem of learning control policies from data containing variable, dynamic and non, the door acts as an environmental constraint that restricts the movement of ones hand along the opening arc of the door. When stirring soup in a saucepan, the sides of the pan prevent the spoon moving beyond

  15. Smoluchowski-Kramers approximation in the case of variable friction

    E-Print Network [OSTI]

    Mark Freidlin; Wenqing Hu

    2012-03-03T23:59:59.000Z

    We consider the small mass asymptotics (Smoluchowski-Kramers approximation) for the Langevin equation with a variable friction coefficient. The limit of the solution in the classical sense does not exist in this case. We study a modification of the Smoluchowski-Kramers approximation. Some applications of the Smoluchowski-Kramers approximation to problems with fast oscillating or discontinuous coefficients are considered.

  16. Piecewise Linear Instrumental Variable Estimation of Causal Influence Richard Scheines

    E-Print Network [OSTI]

    Spirtes, Peter

    studies show that when the causal influence of X on Y is non-linear, the piecewise linear linear IV-estimator. In the final section, we describe an experiment comparing regular regression, linearPiecewise Linear Instrumental Variable Estimation of Causal Influence Richard Scheines Dept

  17. Quantifying intrapopulation variability in stable isotope data for Spotted Seatrout

    E-Print Network [OSTI]

    111 Quantifying intrapopulation variability in stable isotope data for Spotted Seatrout (Cynoscion of the National Marine Fisheries Service, NOAA. Abstract--Stable isotope (SI) values of carbon (13C) and nitrogen patterns of enrichment in fish caught from coastal to off- shore sites and as a function of fish size

  18. Load Alleviation on Wind Turbine Blades using Variable Airfoil Geometry

    E-Print Network [OSTI]

    Load Alleviation on Wind Turbine Blades using Variable Airfoil Geometry Peter Bjørn Andersen, Mac Loads, Trailing Edge Flaps, PID control, Signal Noise. 1 Introduction Wind turbine blades are subject to 40% when signal noise is added to the control. Keywords: Wind Turbine, Load Alleviation, Fatigue

  19. Historical Range of Variability and Current Landscape Condition Analysis

    E-Print Network [OSTI]

    Historical Range of Variability and Current Landscape Condition Analysis: South Central Highlands the Reference Period E. Overview of Integrated Ecosystem Management ... p 30 F. Literature Cited ... p 34 structures C. Legacies of Euro-American Settlement and Current Conditions ... p 67 1. Logging ("High

  20. Model Predictive Control of Variable Density Multiphase Flows Governed by

    E-Print Network [OSTI]

    Hinze, Michael

    of model predictive control (MPC) consists in steering or keeping the state of a dynamical systemModel Predictive Control of Variable Density Multiphase Flows Governed by Diffuse Interface Models appearing in the model predictive control strategy. The resulting control concept is known as instantaneous

  1. A method for robust variable selection with significance assessment

    E-Print Network [OSTI]

    Rosasco, Lorenzo

    and control. Such an analy- sis encompasses, at least two steps, gene selection and model assessment. When architecture to assess the statistical significance of the model via cross validation and permutation testing. Finally we challenge the system on real data experiments, and study its performance when changing variable

  2. Computation of Stochastic Nash Equilibrium via Variable Sample ...

    E-Print Network [OSTI]

    2013-11-18T23:59:59.000Z

    Nov 18, 2013 ... Page 1 .... Until now, how to use the variable sample scheme for solving SNE .... theoretical investigations like “to what extent the existence results can ...... iterations and the solution time don't change much when the value of ...

  3. Variability of urea concentration in camel milk in Kazakhstan

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Note Variability of urea concentration in camel milk in Kazakhstan Bernard FAYE 1*, Gaukhar University Al Farabi, 71 av. Al-Farabi, 050040 Almaty, Kazakhstan Received 12 February 2010 ­ Revised 4 March interpretable variation factors. In 102 milk samples collected in Kazakhstan, at four seasons of the year

  4. Benchmarking Variable Cost Performance in an Industrial Power Plant

    E-Print Network [OSTI]

    Kane, J. F.; Bailey, W. F.

    " of utilities exported from the power plant to the actual cost of the fuel and electricity required to produce them, generating a single number or "index." Variable cost performance is benchmarked by comparing the index from one period of time to the index...

  5. Security in Quantum Cryptography vs. Nonlocal Hidden Variables 1

    E-Print Network [OSTI]

    Aerts, Diederik

    Security in Quantum Cryptography vs. Nonlocal Hidden Variables 1 Diederik Aerts , Marek Czachor, the arguments for security of quantum cryptography become logically circular: Bohm-type theories do not allow that makes them secure even if our enemies have more imagination and know how to measure hidden

  6. Adaptive Calculation of Variable Coefficients Elliptic Differential Equations via Wavelets

    E-Print Network [OSTI]

    Averbuch, Amir

    Description Generating a "good" discrete representation for continuous operators is one of the basic problemsAdaptive Calculation of Variable Coefficients Elliptic Differential Equations via Wavelets Amir rather than in the original physical space can speed up the performance of the sparse solver by a factor

  7. MULTIRESOLUTION WAVELET ANALYSIS OF HEART RATE VARIABILITY FOR

    E-Print Network [OSTI]

    Teich, Malvin C.

    MULTIRESOLUTION WAVELET ANALYSIS OF HEART RATE VARIABILITY FOR HEART-FAILURE AND HEART, heart-transplant patients, and nor- mal subjects, using wavelet-based multiresolution tech- niques and receiver-operating-characteristic (ROC) anal- ysis. The scale-dependent wavelet-coeficient standard de

  8. Variable Responses of Lowland Tropical Forest Nutrient Status

    E-Print Network [OSTI]

    Harms, Kyle E.

    Variable Responses of Lowland Tropical Forest Nutrient Status to to play a key role in nutrient retention. We discuss our findings in the context of possible impacts Springer Science+Business Media, LLC 387 #12;growth not only alters forests' nutrient demands but also

  9. Investigation of the Brazil Current front variability from altimeter data

    E-Print Network [OSTI]

    Investigation of the Brazil Current front variability from altimeter data Gustavo J. Goni Atlantic, Brazil Abstract. The southwestern Atlantic Ocean is characterized by the confluence of the Brazil in conjunction with a two-layer dynamical ocean scheme to monitor the Brazil Current front and to investigate its

  10. Total Solar Irradiance Variability and the Solar Activity Cycle

    E-Print Network [OSTI]

    Probhas Raychaudhuri

    2006-05-06T23:59:59.000Z

    It is suggested that the solar variability is due to the perturbed nature of the solar core and this variability is provided by the variability of the solar neutrino flux from the solar neutrino detectors i.e., Homestake, Superkamiokande, SAGE and GALLEX-GNO. The solar neutrino flux in the standard solar model (SSM) was calculated on the assumption of L_nu (neutrino luminosity) = L_gamma (optical luminosity) which implies that if there is a change in optical luminosity then solar neutrino flux data will also be changed. An internal dynamo due to the cyclic variation of nuclear energy generation inside the core of the sun is responsible for the solar activity cycle was suggested and thus the internal magnetic field is also variable. Again the changes in the nuclear energy generation induce structural changes that result in variations of the global solar parameters i.e., luminosity, radius and temperatures etc. From the analysis of total solar irradiance (TSI) data during the year from 1970 to 2003 we have found five phases within the solar activity cycle. The first phase (I) starts before two years from the sunspot minimum. The second phase (II) starts at the time of sunspot minimum and phase (III) starts before 2/3 years from sunspot maximum whereas phase (IV) starts at sunspot maximum and fifth phase (V) starts at after 2-3 years from sunspot maximum.

  11. Relationship between gradient and EM steps in latent variable models.

    E-Print Network [OSTI]

    Roweis, Sam

    includes random search, standard gradient­based algorithms, line search methods such as conjugate gradient to to first order method operat­ ing on the gradient of a locally reshaped likelihood function. DirectRelationship between gradient and EM steps in latent variable models. Ruslan Salakhutdinov Sam

  12. Relationship between gradient and EM steps in latent variable models.

    E-Print Network [OSTI]

    Roweis, Sam

    includes random search, standard gradient-based algorithms, line search methods such as conjugate gradient to to first order method operat- ing on the gradient of a locally reshaped likelihood function. DirectRelationship between gradient and EM steps in latent variable models. Ruslan Salakhutdinov Sam

  13. A very high frequency CMOS Variable Gain Amplifier

    E-Print Network [OSTI]

    Tan, Siang Tong

    2001-01-01T23:59:59.000Z

    A fully differential CMOS Variable Gain Amplifier (VGA) consisting of an analog multiplier, current gain stages, and resistor loads is designed for very high frequency applications. The gain can be programmed from 0dB to 40dB with -3dB bandwidth...

  14. Vector Boson Fusion Higgs Production at the LHC - Mass Variables

    E-Print Network [OSTI]

    Dan Green

    2005-01-12T23:59:59.000Z

    There exist substantial backgrounds to the vector boson fusion production of Higgs at the LHC. Mass variables are studied which may alleviate the need to assume a spin zero WW resonance in order to achieve a sufficient signal to noise ratio in the two jet plus two lepton and missing energy final state.

  15. Optimal Scheduling under Variable Electricity Pricing and Availability

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    due dates · Location of event points ­ At demand points ­ At some energy pricing/availability levels periods with same energy pricing/power level · Only valid for single stage plants November 11, 2009 EnergyOptimal Scheduling under Variable Electricity Pricing and Availability Pedro M. Castro Iiro

  16. Tidal Stage Variability of Fecal Coliform and Chlorophyll a

    E-Print Network [OSTI]

    Mallin, Michael

    leachates, leaking sewer mains, wild and do- mestic animal wastes, and runo. However, the inter- action environmental hazards, to enter an estuarine environment characterized by high variability regarding temperature to understanding both the basic ecology of tidal creeks and the applied aspects of sampling protocols and pollutant

  17. Modeling a Snap-Action, Variable-Delay Switch

    E-Print Network [OSTI]

    Department of Systems Biology, Harvard Medical School, Boston, Massachusetts, United States of America, 2, Cambridge, Massachusetts, United States of America When exposed to tumor necrosis factor (TNF) or TNFModeling a Snap-Action, Variable-Delay Switch Controlling Extrinsic Cell Death John G. Albeck1

  18. Less Acres and Variable Yield Mark Ohio's Crops

    E-Print Network [OSTI]

    Jones, Michelle

    developing technologies and cropping systems that are efficient in capturing solar energy, sus- tainable overLess Acres and Variable Yield Mark Ohio's Crops From 1994 to 2004, the combined acreage of soybean Pathology Dr. Mark Loux Horticulture and Crop Science Dr. Robert Mullen School of Natural Resources Dr. Mark

  19. Thermoelectric Properties of Superlattice Materials with Variably Spaced Layers

    E-Print Network [OSTI]

    Walker, D. Greg

    Thermoelectric Properties of Superlattice Materials with Variably Spaced Layers T.D. Musho of electronic level alignment. We have investigated the thermoelectric proper- ties of VSSL structures using leads to enhancement of thermoelectric properties. This presumption is based on electrical studies

  20. Supplementary Materials (ID: 0290) Section 1: Auxilary Variables and Constraints

    E-Print Network [OSTI]

    Lau, W. H. Nynson

    segment label assignment indicator mentioned above. The equivalent linear constraints are ti,j k hk constraints required for the selected nodes and edges to form a connected graph. In Mixed Integer Programming, some auxiliary variables are defined to capture certain events (i.e., a particular assignment to all