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


1

Dynamic Analysis of a Grid-Connected Wind Electric Generator with Embedded Static VAR Compensator  

Science Conference Proceedings (OSTI)

This paper describes modeling and simulation of Wind Electric Generator (WEG) comprising a pitch controlled Horizontal Axis Wind Turbine (HAWT) coupled to squirrel cage induction generator through a gear. The generic issue of VAR drain from the grid ... Keywords: Wind turbine, induction generator, two mass model - drive train, SVC, wind electric generator dynamics

Vishnuvardhanan V.; Sasi K. Kottayil

2009-12-01T23:59:59.000Z

2

Life Extension Guidelines for Static VAR Compensators  

Science Conference Proceedings (OSTI)

The static volt-ampere-reactive (VAR) compensator (SVC) was first introduced in the early 1960s in the form of mechanically switched saturated reactors and capacitors. In the 1970s, thyristor-controlled reactors and capacitors were introduced, overcoming technical limitations of saturable reactors by offering dynamic switching. As with many other parts of the utility infrastructure, these SVCs are reaching the end of their service lifetime. Owners/operators need help making maintenance and replacement/re...

2009-11-06T23:59:59.000Z

3

Probabilistic voltage assessment and VAR compensation  

SciTech Connect

The system voltage profile subject to system elements' forced outage is accessed. Two system voltage reliability indexes are evaluated: the loss of voltage probability, and the expected voltage violation. A similar set of two voltage reliability indexes are also calculated for every load bus in the system. A simple VAR compensation approach is introduced. It enhances the voltage profile assuming a maximum of three overlapping element outages can occur. For purposes of demonstration, the system and load bus voltage reliability indexes are calculated for the AEP 30-bus system. Results of applying the proposed VAR compensation scheme to the 30-bus system are also presented and discussed.

Sharaf, T.A.M.; Berg, G.J.

1988-01-01T23:59:59.000Z

4

Low Cost Emergency VAR Compensator  

Science Conference Proceedings (OSTI)

The barriers to commercialization of the Capacitor Bank Group Shorting (CAPS) concept were investigated in this study. Also, the application of mechanically switched CAPS systems was examined from the technical and cost points of view. In addition, a semiconductor (thyristor) switched or controlled CAPS arrangement was studied. Although only three utilities were surveyed in the market assessment part of the study, it was concluded that if there is a need for additional shunt compensation systems or a nee...

2000-11-08T23:59:59.000Z

5

Analyze of the influence of a static var compensator in operation of a electrical energy industrial system with a cogeneration.  

E-Print Network (OSTI)

??In this work is analyzed the influence of a static var compensator (SVC) on the electromechanical stability of the electrical energy system of the industrial… (more)

GILSON SOARES DA SILVA JÚNIOR

2008-01-01T23:59:59.000Z

6

Flicker Control of Car Shredder Using Hybrid VAR Compensator  

Science Conference Proceedings (OSTI)

The different operating modes of a new car shredder were anticipated to produce significant voltage drop across the electrical supply network, resulting in flicker emissions that would cause the planning levels at PCC to exceed the limits recommended by the International Electrotechnical Commission. Hand calculations were used to estimate the voltage drop for the various modes and the reactive compensation required to keep flicker at acceptable levels. A hybrid volt-ampere-reactive compensator was design...

2011-12-30T23:59:59.000Z

7

Dynamic performance and control of a static var generator using cascade multilevel inverters  

SciTech Connect

A cascade multilevel inverter is proposed for static VAR shifting, compensation/generation applications. The new cascade M-level inverter consists of (M-1)/2 single-phase full bridges in which each bridge has its own separate dc source. This inverter can generate almost sinusoidal waveform voltage with only one time switching per cycle. It can eliminate the need for transformers in multipulse inverters. A prototype static VAR generator (SVG) system using 11- level cascade inverter (21-level line-to-line voltage waveform) has been built. The output voltage waveform is equivalent to that of a 60- pulse inverter. This paper focuses on dynamic performance of the cascade inverter based SVG system. Control schemes are proposed to achieve a fast response which is impossible for a conventional static VAR compensator (SVC). Analytical, simulated and experimental results show the superiority of the proposed SVG system.

Peng, Fang Zheng [Tennessee Univ., Knoxville, TN (United States); Lai, Jih-Sheng [Oak Ridge National Lab., TN (United States)

1996-10-01T23:59:59.000Z

8

130 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 56, NO. 1, JANUARY 2009 Static Var Compensator and Active Power Filter With  

E-Print Network (OSTI)

transformers scaled in the power of three. The filter can compensate load currents with a high harmonic content Compensator and Active Power Filter With Power Injection Capability, Using 27-Level Inverters and Photovoltaic, and Luis Morán, Fellow, IEEE Abstract--An active power filter and static var compensator with active power

Rudnick, Hugh

9

Optimal Compensation Algorithms for a Dynamic Voltage Restorer  

Science Conference Proceedings (OSTI)

The Dynamic Voltage Restorer (DVR) as an electronics based custom device, is used to protect sensitive loads from the voltage sags in the power distribution system. With the rapid technology advancement in industrial control processes, it is experiencing ... Keywords: Dynamic Voltage Restorer (DVR), power quality, voltage sag, Zero Active Power Compensation (ZAPC), Minimal Active Power Compensation (MAPC)

Deng Pan; Chen Zhongming; Jiang Peng; Abdelkrim Benchaib; Guillaume De Preville

2010-06-01T23:59:59.000Z

10

Resistive Welders and Flickers: An Analysis of Solutions Using Ultracapacitors and Active VAR Compensation  

Science Conference Proceedings (OSTI)

Observable flicker in lighting can be caused by resistance welding machines, mainly due to the high level of pulse power drawn during the weld operation. This report discusses application of ultracapacitors and high-speed reactive compensation (HSRC) systems to mitigate the problem.

2001-10-16T23:59:59.000Z

11

Minimum Energy Compensation Strategy and Characteristic Analysis for Dynamic Voltage Restorer  

Science Conference Proceedings (OSTI)

The minimum energy compensation strategy and its characteristic for Dynamic Voltage Restorer (DVR) considering the equipment’s voltage limitation are discussed. The strategy when the injection voltage is under or especially above the voltage limitation ... Keywords: dynamic voltage restorer, minimum energy compensation, compensation strategy, compensation characteristic, voltage limitation

Yingying Liu; Xu Yonghai; Xiao Xiangning; Guo Chunlin

2009-10-01T23:59:59.000Z

12

Coordination of a distribution level continuously controlled compensation device with existing substation equipment for long term VAR management  

SciTech Connect

The implementation of a continuously controlled reactive compensation device, such as an SVC or a static condenser'' (STATCON), in a distribution-level substation provides opportunities to improve power quality and reliability due to the speed of response of such a device. Further benefits can be gained by coordinating the reactive compensation device and its related controls with other substation voltage control equipment, such as load tap changing (LTC) transformers and mechanically-switched capacitors. The results presented in this paper illustrate the impact that a [+-] 12 Mvar STATCON can have on a 150 MW, 12.5 kV load bus, in the Commonwealth Edison power system. Three control concepts for various levels of integration of the substation STATCON, LTCs, and mechanically-switched capacitors are presented. With broader application of SVCs and STATCONs at distribution substations, various other control strategies may also evolve.

Paserba, J.J.; Leonard, D.J.; Miller, N.W. (GE Industrial and Power Systems, Schenectady, NY (United States). Power Systems Engineering Dept.); Lauby, M.G. (Electric Power Research Inst., Palo Alto, CA (United States)); Naumann, S.T. (Commonwealth Edison Co., Chicago, IL (United States)); Sener, F.P. (PHE Consulting, Brecksville, OH (United States))

1994-04-01T23:59:59.000Z

13

Modeling and Compensation of the Dynamic Interaction of a Mobile Manipulator  

E-Print Network (OSTI)

A mobile manipulator composed of a manipulator and a mobile platform has a much larger workspace than a fixed-base manipulator. While the on-board manipulator reaches out and performs manipulation tasks, the role of the mobile platform is to position the manipulator in a preferred configuration. In this paper, we study the effect of the dynamic interaction between the manipulator and the mobile platform of a mobile manipulator on the task performance. We consider the task that the end point of the manipulator tracks a desired trajectory in a fixed reference frame. The effect of the dynamic interaction on the tracking performance is examined by comparing four different cases: (1) without any compensation of the dynamic interaction at all; (2) the mobile platform compensates the dynamic interaction caused by the manipulator; (3) the manipulator compensates the dynamic interaction caused by the mobile platform; and (4) with full compensation of the dynamic interaction with each other. 1 ...

Yoshio Yamamoto; Xiaoping Yun

1994-01-01T23:59:59.000Z

14

Dynamic melt rate control on a Laboratory scale VAR furnace without load cell feedback  

SciTech Connect

Based on a linearized version of an accurate, low order, dynamic melt rate model, a feedback melt rate controller was designed and tested on a small VAR furnace at Los Alamos National Laboratory. Model based control was necessary because the furnace is not equipped with a working load cell transducer. The model was incorporated into a process filter that produces estimates of electrode thermal boundary layer, electrode gap, electrode position and electrode mass. Estimated values for the thermal boundary layer and electrode gap were used for feedback. The input commands were melting current and electrode drive speed. A test melt was performed wherein a 0.127 m diameter 304SS electrode was melted into 0.165 m diameter ingot at a nominal melt rate of 27 g/s. Toward the end of the test, a melt rate step up to 32 g/s was commanded. The controller initiated a nonlinear current ramp to produce the commanded step. Electrode position data were analyzed and the results used to determine that the actual melt rate profile followed the commanded profile relatively well.

Beaman, Joseph J.; Melgaard, d; Shelmidine, G. J. (Gregory J.); Tubesing, P. K. (Philip K.); Aikin, R. M. (Robert M.); Williamson, R. L. (Rodney L.)

2001-01-01T23:59:59.000Z

15

Optimization Of Chromaticity Compensation And Dynamic Aperture In MEIC Collider Rings  

SciTech Connect

The conceptual design of the Medium-energy Electron-Ion Collider (MEIC) at Jefferson Lab relies on an ultra-small beta-star to achieve high luminosities of up to 10{sup 34} cm{sup -2} s{sup -1}. A low-beta insertion for interaction regions unavoidably induces large chromatic effects that demand a proper compensation. The present approach of chromatic compensation in the MEIC collider rings is based on a local correction scheme using two symmetric chromatic compensation blocks that includes families of sextupoles, and are placed in a beam extension area on both sides of a collision point. It can simultaneously compensate the first order chromaticity and chromatic beam smear at the IP without inducing significant second order aberrations. In this paper, we investigate both the momentum acceptance and dynamic aperture in the MEIC ion collider ring by considering the aberration effects up to the third order, such as amplitude dependent tune shift. We also explore the compensation of the third order effects by introducing families of octupoles in the extended beam area.

Fanglei Lin, Yaroslav Derbenev, Vasiliy Morozov, Yuhong Zhang, Kevin Beard

2012-07-01T23:59:59.000Z

16

Comprehensive functional testing and dynamic compensation techniques for Cellular Neural Networks  

E-Print Network (OSTI)

Cellular Neural Networks (CNN's) are analog, non-linear, dynamic systems which are especially well suited for solving problems in the areas of image processing and pattern recognition. State of the art implementations of two-dimensional CNN's arrays are fabricated in sub-micron Very Large Scale Integration (VLSI) technologies. The increase in circuit integration has driven the need to develop robust testing methods to establish baseline functionality of CNN'S. Present techniques for testing CNN hardware provide only limited capabilities, often require additional hardware, and are limited to specific topologies. The goal of this thesis is to provide a deterministic method to conduct functional testing and dynamic compensation of CNN arrays independent of the size or topology of the array. The methods provide comprehensive, non-invasive techniques for verifying the integrity of each of the functional paths as well as procedures to measure and minimize parametric faults in real CNN hardware. The functional tests consist of a sequence of inputs to the array that insure each node in the system level representation of the CNN is toggled and propagated to the output where it is compared to a known good output vector set. The dynamic compensation strategies characterize and attempt to minimize or eliminate the effect of undesirable parametric faults such as time-constant mismatches, non-linearity in the multipliers and state nodes, and system offsets. Whenever possible, the compensation techniques are carried out locally on each cell independently, otherwise a global compensation approach is used. Numerous CNN architectures had to be modeled to provide insight into different problems faced when testing a VLSI implementations of CNN arrays. For this reason, a set of software tools was developed to select CNN macromodels of different complexities, combine input stimulus files in a logical manner, and generate the necessary files for simulation. The simulation results were used to design, refine, and measure the effectiveness of the proposed testing strategies.

Grimaila, Michael Russell

1995-01-01T23:59:59.000Z

17

Dynamic gating window for compensation of baseline shift in respiratory-gated radiation therapy  

Science Conference Proceedings (OSTI)

Purpose: To analyze and evaluate the necessity and use of dynamic gating techniques for compensation of baseline shift during respiratory-gated radiation therapy of lung tumors. Methods: Motion tracking data from 30 lung tumors over 592 treatment fractions were analyzed for baseline shift. The finite state model (FSM) was used to identify the end-of-exhale (EOE) breathing phase throughout each treatment fraction. Using duty cycle as an evaluation metric, several methods of end-of-exhale dynamic gating were compared: An a posteriori ideal gating window, a predictive trend-line-based gating window, and a predictive weighted point-based gating window. These methods were evaluated for each of several gating window types: Superior/inferior (SI) gating, anterior/posterior beam, lateral beam, and 3D gating. Results: In the absence of dynamic gating techniques, SI gating gave a 39.6% duty cycle. The ideal SI gating window yielded a 41.5% duty cycle. The weight-based method of dynamic SI gating yielded a duty cycle of 36.2%. The trend-line-based method yielded a duty cycle of 34.0%. Conclusions: Dynamic gating was not broadly beneficial due to a breakdown of the FSM's ability to identify the EOE phase. When the EOE phase was well defined, dynamic gating showed an improvement over static-window gating.

Pepin, Eric W.; Wu Huanmei; Shirato, Hiroki [School of Health Sciences, Purdue University, West Lafayette, Indiana 47907 (United States); Purdue School of Engineering Technology, IUPUI, Indianapolis, Indiana 46202 (United States); Hokkaido University School of Medicine, Sapporo, 060-8638 (Japan)

2011-04-15T23:59:59.000Z

18

Grid Shunt Reactive Power Compensation  

Science Conference Proceedings (OSTI)

This report provides essential information on transmission grid shunt reactive power compensation, with particular focus on controllable reactive power sources such as the static var controller (SVC). Applying the information presented in this report can help electric utilities planning grid shunt reactive power compensation strategies or operating shunt reactive power compensation equipment to increase grid reliability, improve grid performance and prevent costly cascading outages. The report is intende...

2008-11-26T23:59:59.000Z

19

VAR Support from Distributed Wind Energy Resources: Preprint  

DOE Green Energy (OSTI)

As the size and quantity of wind farms and other distributed generation facilities increase, especially in relation to local grids, the importance of a reactive power compensator or VAR support from these facilities becomes more significant. Poorly done, it can result in cycling or inadequate VAR support, and the local grid could experience excessive voltage regulation and, ultimately, instability. Improved wind turbine and distributed generation power control technologies are creating VAR support capabilities that can be used to enhance the voltage regulation and stability of local grids. Locating VAR support near the point of consumption, reducing step size, and making the control active all improve the performance of the grid. This paper presents and discusses alternatives for improving the integration of VAR support from distributed generation facilities such as wind farms. We also examine the relative effectiveness of distributed VAR support on the local grid and how it can b e integrated with the VAR support of the grid operator.

Romanowitz, H.; Muljadi, E.; Butterfield, C. P.; Yinger, R.

2004-07-01T23:59:59.000Z

20

Multivariable self-organizing fuzzy logic control using dynamic performance index and linguistic compensators  

Science Conference Proceedings (OSTI)

As far as fuzzy logic based multivariable control systems are concerned, it is not always an easy task to express control strategies in the form of related multi-situations to multi-actions control rules. Decoupled control is one possible and attractive ... Keywords: Compensator, Decoupled control, Fuzzy logic control, Multivariable system, Self-organizing

Qing Lu; Mahdi Mahfouf

2012-12-01T23:59:59.000Z

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


21

Reactive Power Compensator.  

DOE Patents (OSTI)

A system and method for determining and providing reactive power compensation for an inductive load. A reactive power compensator (50,50') monitors the voltage and current flowing through each of three distribution lines (52a, 52b, 52c), which are supplying three-phase power to one or more inductive loads. Using signals indicative of the current on each of these lines when the voltage waveform on the line crosses zero, the reactive power compensator determines a reactive power compensator capacitance that must be connected to the lines to maintain a desired VAR level, power factor, or line voltage. Alternatively, an operator can manually select a specific capacitance for connection to each line, or the capacitance can be selected based on a time schedule. The reactive power compensator produces control signals, which are coupled through optical fibers (102/106) to a switch driver (110, 110') to select specific compensation capacitors (112) for connections to each line. The switch driver develops triggering signals that are supplied to a plurality of series-connected solid state switches (350), which control charge current in one direction in respect to ground for each compensation capacitor. During each cycle, current flows from ground to charge the capacitors as the voltage on the line begins to go negative from its positive peak value. The triggering signals are applied to gate the solid state switches into a conducting state when the potential on the lines and on the capacitors reaches a negative peak value, thereby minimizing both the potential difference and across the charge current through the switches when they begin to conduct. Any harmonic distortion on the potential and current carried by the lines is filtered out from the current and potential signals used by the reactive power compensator so that it does not affect the determination of the required reactive compensation. 26 figs.

El-Sharkawi, M.A.; Venkata, S.S.; Chen, M.; Andexler, G.; Huang, T.

1992-07-28T23:59:59.000Z

22

Reactive power compensator  

DOE Patents (OSTI)

A system and method for determining and providing reactive power compensation for an inductive load. A reactive power compensator (50,50') monitors the voltage and current flowing through each of three distribution lines (52a, 52b, 52c), which are supplying three-phase power to one or more inductive loads. Using signals indicative of the current on each of these lines when the voltage waveform on the line crosses zero, the reactive power compensator determines a reactive power compensator capacitance that must be connected to the lines to maintain a desired VAR level, power factor, or line voltage. Alternatively, an operator can manually select a specific capacitance for connection to each line, or the capacitance can be selected based on a time schedule. The reactive power compensator produces control signals, which are coupled through optical fibers (102/106) to a switch driver (110, 110') to select specific compensation capacitors (112) for connections to each line. The switch driver develops triggering signals that are supplied to a plurality of series-connected solid state switches (350), which control charge current in one direction in respect to ground for each compensation capacitor. During each cycle, current flows from ground to charge the capacitors as the voltage on the line begins to go negative from its positive peak value. The triggering signals are applied to gate the solid state switches into a conducting state when the potential on the lines and on the capacitors reaches a negative peak value, thereby minimizing both the potential difference and across the charge current through the switches when they begin to conduct. Any harmonic distortion on the potential and current carried by the lines is filtered out from the current and potential signals used by the reactive power compensator so that it does not affect the determination of the required reactive compensation.

El-Sharkawi, Mohamed A. (Renton, WA); Venkata, Subrahmanyam S. (Woodinville, WA); Chen, Mingliang (Kirkland, WA); Andexler, George (Everett, WA); Huang, Tony (Seattle, WA)

1992-01-01T23:59:59.000Z

23

Loss-compensated radiometer  

SciTech Connect

A new radiometer concept is described and evaluated. Automatic dynamic electrical compensation is achieved by a high-gain feedback amplifier and low thermal inertia solar and compensating electrical sensors. With sufficiently high gain, compensation can increase accuracy to limits determined by amplifier drift. Equations governing instrument response are derived and analyzed. Initial measurements on a preliminary prototype confirm the validity of the concept which should yield a very accurate instrument with ''self calibrating'' features.

Lobo, P.C.

1984-05-01T23:59:59.000Z

24

Abstract--This paper proposes an effective VAR planning based on reactive power margin for the enhancement of dynamic  

E-Print Network (OSTI)

between generators and load characteristics. Therefore, analysis of distribution systems has become a very profiles of the system and these profiles are different for different types of load [4]. The importance representation for dynamic performance analysis [5]. The main classifications of loads are as static and dynamic

Pota, Himanshu Roy

25

DC-AC Inverters for Static Condenser and Dynamic Voltage Restorer Applications  

Science Conference Proceedings (OSTI)

There has been significant recent interest in general classes of power electronic-based active power conditioners such as static condensers and dynamic voltage restorers. These systems are discussed in this paper with a focus on the inverter output stage. ... Keywords: Power Quality, Static var Compensators, Custom Power

Steven R. Ashcraft; S. Mark Halpin

1996-03-01T23:59:59.000Z

26

Superconducting VAR control  

DOE Patents (OSTI)

Static VAR control means employing an asymmetrically controlled Graetz bridge and a superconducting direct current coil having low losses and low cost characteristics.

Boenig, Heinrich J. (Los Alamos, NM); Hassenzahl, William V. (Piedmont, CA)

1982-01-01T23:59:59.000Z

27

Var Coordinated Control of DFIG Impact on Small Signal Stability of Power System  

Science Conference Proceedings (OSTI)

The wind farm based on Doubly Fed Induction Generator (DFIG) is built. Not only it can be as active power source to provide active power to network, but also as reactive power source to stabilize voltage or supply Var compensation (reactive power absorbed ... Keywords: Doubly Fed Induction Generator, Var coordinated control, low-frequency oscillation, small signal stability

Lei Wang; Hongjie Jia

2012-04-01T23:59:59.000Z

28

Dynamic performance of a STATCON at an HVDC inverter feeding a very weak AC system  

SciTech Connect

This paper investigates the dynamic performance of the advanced static var compensator or STATCON at a high voltage direct current (HVDC) converter terminal where the ac system has a very low short circuit ratio (SCR). The STATCON is based on a nine-level GTO thyristor inverter. The studies include operating characteristics of the STATCON under various ac and dc disturbances. The simulation results are compared with other types of reactive power compensation options available for such applications. It is shown that the STATCON has clear advantages over the other compensators, in areas such as; fault response time, voltage support ability, and dc recovery, while operating with very weak ac systems.

Zhuang, Y.; Menzies, R.W. [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Nayak, O.B. [HVDC Research Centre, Winnipeg, Manitoba (Canada); Turanli, H.M. [Manitoba Hydro, Winnipeg, Manitoba (Canada)

1996-04-01T23:59:59.000Z

29

CEO Compensation  

E-Print Network (OSTI)

This paper surveys the recent literature on CEO compensation. The rapid rise in CEO pay over the past 30 years has sparked an intense debate about the nature of the pay-setting process. Many view the high level of CEO ...

Frydman, Carola

30

Superconducting VAR control. [Patent application  

DOE Patents (OSTI)

Static VAR control means are described employing an asymmetrically controlled Graetz bridge and a superconducting direct current coil having low losses and low cost characteristics.

Boenig, H.J.; Hassenzahl, W.V.

1980-12-05T23:59:59.000Z

31

Reactive Power Compensation Technologies, State-of-the-Art Review  

E-Print Network (OSTI)

reactors to provide or absorb the required reactive power have been developed [7], [8], [9]. Also, the use static VAR generators, using power electronic technologies have been proposed and developed [7 compensators (SVC) consist of standard reactive power shunt elements (reactors and capacitors) which

Rudnick, Hugh

32

Reactive power compensating system  

DOE Patents (OSTI)

The reactive power of an induction machine is compensated by providing fixed capacitors on each phase line for the minimum compensation required, sensing the current on one line at the time its voltage crosses zero to determine the actual compensation required for each phase, and selecting switched capacitors on each line to provide the balance of the compensation required.

Williams, Timothy J. (Redondo Beach, CA); El-Sharkawi, Mohamed A. (Renton, WA); Venkata, Subrahmanyam S. (Seattle, WA)

1987-01-01T23:59:59.000Z

33

VAR control: leading and lagging power factor  

SciTech Connect

Using the examples of power system failures in Jacksonville, Florida, New York City, and France which were the result of either a deficiency of installed VAR generation sources or an excess of VAR's after the affected system had been isolated, the problem of VAR control in general is discussed and some insight is provided as to how situations can occur to cause system instability because of deficient or excess VARS. (LCL)

Boyle, J.R.

1980-01-01T23:59:59.000Z

34

Gmti Motion Compensation  

DOE Patents (OSTI)

Movement of a GMTI radar during a coherent processing interval over which a set of radar pulses are processed may cause defocusing of a range-Doppler map in the video signal. This problem may be compensated by varying waveform or sampling parameters of each pulse to compensate for distortions caused by variations in viewing angles from the radar to the target.

Doerry, Armin W. (Albuquerque, NM)

2004-07-20T23:59:59.000Z

35

Real-time var control by SCADA  

SciTech Connect

This paper outlines the operation and advantages of the SCADA capacitor control called CAPCON, developed by the Virginia Electric and Power Company (Virginia Power). CAPCON is used to control vars system-wide by switching substation capacitor banks based on real-time var and voltage data instead of the traditional time clock method.

Girotti, T.B.; Tweed, N.B.; Houser, N.R. (Virginia Power Co., Richmond, VA (USA))

1990-02-01T23:59:59.000Z

36

Reactive Power Compensating System.  

DOE Patents (OSTI)

The circuit was designed for the specific application of wind-driven induction generators. It has great potential for application in any situation where a varying reactive power load is present, such as with induction motors or generators, or for transmission network compensation.

Williams, Timothy J.; El-Sharkawi, Mohamed A.; Venkata, Subrahmanyam S.

1985-01-04T23:59:59.000Z

37

Regulatory constraints on executive compensation  

E-Print Network (OSTI)

This paper explores the influence of economic regulation on the level and structure of executive compensation. We find substantial and persistent differences in CEO compensation between firms subject to economic regulation ...

Joskow, Paul L.

1993-01-01T23:59:59.000Z

38

Compensation | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Compensation | National Nuclear Security Administration Compensation | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Compensation Home > Federal Employment > Working at NNSA > Compensation Compensation Whether you're a new college graduate, someone with industry experience looking to move into a Federal job or a current government employee looking

39

The Influence of VAR Processes and Parameters on White Spot ...  

Science Conference Proceedings (OSTI)

In recent years, the performance requirements for nickel-based superalloys have been steadily ..... “Voltage Signatures in VAR”, Proceedings. Vacuum ...

40

Enenrgy Employees Occupational Illness Compensation Program Act...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Enenrgy Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System, PIA, Savannah River Operations Office Enenrgy Employees Occupational Illness Compensation...

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


41

Energy Employees' Occupational Illness Compensation Program Act...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Employees' Occupational Illness Compensation Program Act (EEOICPA) Tracking Database, INL Energy Employees' Occupational Illness Compensation Program Energy Employees' Occupational...

42

Biomass Equipment & Materials Compensating Tax Deduction | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Biomass Equipment & Materials Compensating Tax Deduction Biomass Equipment & Materials Compensating Tax Deduction Eligibility Commercial Industrial Savings For Bioenergy Biofuels...

43

Temperature compensated photovoltaic array  

DOE Patents (OSTI)

A temperature compensated photovoltaic module (20) comprised of a series of solar cells (22) having a thermally activated switch (24) connected in parallel with several of the cells (22). The photovoltaic module (20) is adapted to charge conventional batteries having a temperature coefficient (TC) differing from the temperature coefficient (TC) of the module (20). The calibration temperatures of the switches (24) are chosen whereby the colder the ambient temperature for the module (20), the more switches that are on and form a closed circuit to short the associated solar cells (22). By shorting some of the solar cells (22) as the ambient temperature decreases, the battery being charged by the module (20) is not excessively overcharged at lower temperatures. PV module (20) is an integrated solution that is reliable and inexpensive.

Mosher, Dan Michael (Plano, TX)

1997-11-18T23:59:59.000Z

44

Temperature compensated photovoltaic array  

DOE Patents (OSTI)

A temperature compensated photovoltaic module comprises a series of solar cells having a thermally activated switch connected in parallel with several of the cells. The photovoltaic module is adapted to charge conventional batteries having a temperature coefficient differing from the temperature coefficient of the module. The calibration temperatures of the switches are chosen whereby the colder the ambient temperature for the module, the more switches that are on and form a closed circuit to short the associated solar cells. By shorting some of the solar cells as the ambient temperature decreases, the battery being charged by the module is not excessively overcharged at lower temperatures. PV module is an integrated solution that is reliable and inexpensive. 2 figs.

Mosher, D.M.

1997-11-18T23:59:59.000Z

45

Altitude compensation apparatus  

Science Conference Proceedings (OSTI)

An altitude compensation apparatus is disclosed for use with a carburetion system for an internal combustion engine, the system having a passage through which air is drawn into the engine, a throttle valve positioned in the passage and movable between an open and a closed position to control the flow of air therethrough and a fuel circuit through which fuel is delivered to the passage for mixing with air to form an air-fuel mixture combusted in the engine. The position of the throttle valve, the flow rate of air through the passage and the vacuum level in the engine are each sensed and respective electrical signals representative thereof are supplied. The quantity of fuel supplied by the fuel circuit to the passage is metered thereby to maintain the air-fuel ratio of the mixture produced at a preselected value. In response to the aforesaid signals, the density of air being drawn into the engine is calculated and a control signal is generated to control the metering of fuel. The calculated air density is a function of the altitude at which the engine is operated and the control signal has characteristics which are a function of the calculated air density.

Phelan, M. B.; White, J. M.

1980-02-12T23:59:59.000Z

46

Compensated pulsed alternator  

DOE Patents (OSTI)

This invention relates to an electromechanical energy converter with inertial energy storage. The device, a single phase, two or multi-pole alternator with stationary field coils, and a rotating armature is provided. The rotor itself may be of laminated steel for slower pulses or for faster pulses should be nonmagnetic and electrically nonconductive in order to allow rapid penetration of the field as the armature coil rotates. The armature coil comprises a plurality of power generating conductors mounted on the rotor. The alternator may also include a stationary or counterrotating compensating coil to increase the output voltage thereof and to reduce the internal impedance of the alternator at the moment of peak outout. As the machine voltage rises sinusoidally, an external trigger switch is adapted to be closed at the appropriate time to create the desired output current from said alternator to an external load circuit, and as the output current passes through zero a self-commutating effect is provided to allow the switch to disconnect the generator from the external circuit.

Weldon, William F. (Austin, TX); Driga, Mircea D. (Austin, TX); Woodson, Herbert H. (Austin, TX)

1980-01-01T23:59:59.000Z

47

Energy Employees Occupational Illness Compensation Program Act...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System PIA, Office of Business Operations Energy Employees Occupational Illness Compensation Program Act...

48

ORO Energy Employees Occupational Illness Compensation Program...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

here Home ORO Energy Employees Occupational Illness Compensation Program(EEOICPA)PIA, Oak Ridge Operations Office ORO Energy Employees Occupational Illness Compensation...

49

A multilevel voltage-source inverter with separate dc sources for static var generation  

SciTech Connect

A new multilevel voltage-source inverter with a separate dc sources is proposed for high-voltage, high-power applications, such as flexible ac transmission systems (FACTS) including static var generation (SVG), power line conditioning, series compensation, phase shifting, voltage balancing, fuel cell and photovoltaic utility systems interfacing, etc. The new M-level inverter consists of (M-1)/2 single phase full bridges in which each bridge has its own separate dc source. This inverter can generate almost sinusoidal waveform voltage with only one time switching per cycle as the number of levels increases. It can solve the problems of conventional transformer-based multipulse inverters and the problems of the multilevel diode-clamped inverter and the multilevel flying capacitor inverter. To demonstrate the superiority of the new inverter, a SVG system using the new inverter topology is discussed through analysis, simulation and experiment.

Peng, Fang Zheng [Tennessee Univ., Knoxville, TN (United States)]|[Oak Ridge National Lab., TN (United States); Lai, Jih-Sheng; McKeever, J.; VanCoevering, J. [Oak Ridge National Lab., TN (United States)

1995-09-01T23:59:59.000Z

50

Definition: Automated Voltage And Var Control | Open Energy Information  

Open Energy Info (EERE)

Voltage And Var Control Voltage And Var Control Jump to: navigation, search Dictionary.png Automated Voltage And Var Control Automated voltage and VAR control requires coordinated operation of reactive power resources such as capacitor banks, voltage regulators, transformer load-tap changers, and distributed generation (DG) with sensors, controls, and communications systems. These devices could operate autonomously in response to local events or in response to signals from a central control system.[1] View on Wikipedia Wikipedia Definition Also Known As Volt-VAR Control (VVC) Related Terms smart grid, Reactive Power References ↑ SmartGrid.gov 'Description of Functions' An i LikeLike UnlikeLike You like this.Sign Up to see what your friends like. nline Glossary Definition Retrieved from

51

Bird orientation: compensation for wind  

E-Print Network (OSTI)

Bird orientation: compensation for wind drift in migrating raptors is age dependent Kasper Thorup1 14.04.03 Despite the potentially strong effect of wind on bird orientation, our understanding of how wind drift affects migrating birds is still very limited. Using data from satellite-based radio

Thorup, Kasper

52

Compensated amorphous silicon solar cell  

DOE Patents (OSTI)

An amorphous silicon solar cell incorporates a region of intrinsic hydrogenated amorphous silicon fabricated by a glow discharge wherein said intrinsic region is compensated by P-type dopants in an amount sufficient to reduce the space charge density of said region under illumination to about zero.

Carlson, David E. (Yardley, PA)

1980-01-01T23:59:59.000Z

53

Trade Linkages and Output-Multiplier Effects: A Structural VAR  

E-Print Network (OSTI)

This paper develops a structural VAR model to measure how a shock to one country can affect the GDP of other countries. It uses trade linkages to estimate the multiplier ...

Forbes, Kristin J.

2002-06-05T23:59:59.000Z

54

Dynamical Extended-Range Prediction of Early Monsoon Rainfall over India  

Science Conference Proceedings (OSTI)

The 15-member ensembles of 46-day dynamical forecasts starting on each 15 May from 1991 to 2007 have been produced, using the ECMWF Variable Resolution Ensemble Prediction System monthly forecasting system (VarEPS-monthy). The dynamical model ...

Frédéric Vitart; Franco Molteni

2009-04-01T23:59:59.000Z

55

H.38 EMPLOYEE COMPENSATION: PAY AND BENEFITS (SEP 2013) (a) Total Compensation System  

NLE Websites -- All DOE Office Websites (Extended Search)

H.38 EMPLOYEE COMPENSATION: PAY AND BENEFITS (SEP 2013) H.38 EMPLOYEE COMPENSATION: PAY AND BENEFITS (SEP 2013) (a) Total Compensation System The Contractor shall develop, implement and maintain formal policies, practices and procedures to be used in the administration of its compensation system consistent with FAR 31.205-6 and DEAR 970.3102-05-6; "Compensation for Personal Services" ("Total Compensation System"). DOE-approved standards, if any, shall be applied to the Total Compensation System. The Contractor's Total Compensation System shall be fully documented, consistently applied, and acceptable to the Contracting Officer. Periodic appraisals of contractor performance with respect to the Contractors' Total Compensation System will be conducted. (1) The description of the Contractor Employee Compensation Program should

56

Workers Compensation Program (OWCP) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Workers Compensation Program (OWCP) Workers Compensation Program (OWCP) Workers Compensation Program (OWCP) QUICK GUIDE FOR FEDERAL EMPLOYEES WHEN INJURED ON THE JOB The Office of the Chief Human Capital Officer is responsible for managing the Headquarters Federal Employees Workers' Compensation Program, a program to assist and compensate Federal workers injured on the job. This office answers questions, maintain forms and files, and serves as the liaison between this agency and the Office of Workers' Compensation Program (OWCP), U.S. Department of Labor (DOL) the agency responsible for administering the program. OWCP provides compensation benefits to civilian employees for disability due to personal injury sustained while in the performance of duty or to employment related disease. Benefits cannot be paid if the injury is

57

Marcy Convertible Static Compensator (CSC) Performance Analysis, Availability, and Response to System Disturbances: Technical Update  

Science Conference Proceedings (OSTI)

The development and installation of the Convertible Static Compensator (CSC) system at the New York Power Authority's (NYPA's) Marcy substation is the latest in a series of projects sponsored by EPRI's Flexible AC Transmission System (FACTS) initiative. The CSC is a power electronics-based controller that provides multiple compensating modes, which are needed to securely increase power transfer capability limits of existing transmission systems. The CSC provides flexible dynamic voltage control (to avoid...

2003-03-10T23:59:59.000Z

58

Testing of an Emitter Turn-Off-Based Static Synchronous Compensator (STATCOM) Controller with Real-Time Digital Simulation  

Science Conference Proceedings (OSTI)

In this report, the testing of a controller for a 10-MVAR emitter turn-off (ETO) static VAR compensator (STATCOM) through hardware-in-the-loop simulation is described. As the STATCOM was initially intended to be placed near a 50-MW wind farm within the Bonneville Power Administration (BPA) system, the wind farm, STATCOM, and relevant portions of the utility system were modeled for a real-time simulator at the Center for Advanced Power Systems (CAPS) at Florida State University. Data for validation of the...

2010-01-20T23:59:59.000Z

59

Compensation issues tough to navigate  

Science Conference Proceedings (OSTI)

Monthly economic diversity column for the Tri-City Herald - excerpt pasted below: Most industries out there are feeling the shift to a more educated, thus more empowered consumer. The legal field is no exception, which is why it's no surprise that lawsuits are on the rise. Today's society is one in which people are more aware than ever of their rights, and often equally convinced of their entitlements in a number of areas. For business owners, employees represent a major source of potential lawsuits. And compensation is an area of particular concern given that many complaints against employers revolve around it in some way.

Madison, Alison L.

2012-02-12T23:59:59.000Z

60

Energy Employees' Occupational Illness Compensation Program Act (EEOICPA)  

NLE Websites -- All DOE Office Websites (Extended Search)

Employees' Occupational Illness Compensation Program Act Employees' Occupational Illness Compensation Program Act (EEOICPA) Tracking Database, INL Energy Employees' Occupational Illness Compensation Program Energy Employees' Occupational Illness Compensation Program Act (EEOICPA) Tracking Database, INL Energy Employees' Occupational Illness Compensation Program Energy Employees' Occupational Illness Compensation Program Act (EEOICPA) Tracking Database, INL Energy Employees' Occupational Illness Compensation Program Energy Employees' Occupational Illness Compensation Program Act (EEOICPA) Tracking Database, INL Energy Employees' Occupational Illness Compensation Program More Documents & Publications LM Records Handling System (LMRHS01) - Energy Employees Occupational Illness Compensation Program Act, Office of Legacy Management

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


61

Dynamic  

Office of Legacy Management (LM)

Dynamic Dynamic , and Static , Res.ponse of the Government Oil Shale Mine at ' , . , Rifle, Colorado, to the Rulison Event. , . ; . . DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document. p ( y c - - a 2-1 0 -4- REPORT AT (29-2) 914 USBM 1 0 0 1 UNITED STATES DEPARTMENT O F THE I NTERIOR BUREAU OF MINES e s.09 P. L. R U S S E L L RESEARCH D l RECTOR Februory 2, lB7O DYNAMIC AND STATIC RESPONSE 'OF THE GOVERNMENT OIL SHALE MINE A T RIFLE, COLORADO, T O THE, RULISON EVENT ORDER FROM CFSTl A S ~ B ~ &J C / This page intentionally left blank CONTENTS Page . . . . . . . . . . . . . . . . . . . . . . . . . H i s t o r i c . a l Des c r i p t i o n 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Summary 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction 3

62

Dispersion compensation for attosecond electron pulses  

Science Conference Proceedings (OSTI)

We propose a device to compensate for the dispersion of attosecond electron pulses. The device uses only static electric and magnetic fields and therefore does not require synchronization to the pulsed electron source. Analogous to the well-known optical dispersion compensator, an electron dispersion compensator separates paths by energy in space. Magnetic fields are used as the dispersing element, while a Wien filter is used for compensation of the electron arrival times. We analyze a device with a size of centimeters, which can be applied to ultrafast electron diffraction and microscopy, and fundamental studies.

Hansen, Peter; Baumgarten, Cory; Batelaan, Herman; Centurion, Martin [Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588 (United States)

2012-08-20T23:59:59.000Z

63

Energy Employees Occupational Illness Compensation Program Act...  

Office of Science (SC) Website

Energy Employees Occupational Illness Compensation Program Act (EEOICPA) Integrated Support Center (ISC) ISC Home About Services Freedom of Information Act (FOIA) Privacy Act...

64

Energy Employees Occupational Illness Compensation Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Employees Occupational Illness Compensation Program Home Outreach Event Calendar for DOE Nuclear Weapons Workers Covered Facilities Database Chronic Beryllium Disease Awareness...

65

Using 4d-VAR to Move a Simulated Tropical Cyclone in a Mesoscale Model  

Science Conference Proceedings (OSTI)

It is shown that four-dimensional variational analysis (4d-VAR) is a data assimilation technique that has promise for calculating optimal perturbations for weather modification. Experiments described here demonstrate the ability of 4d-VAR to calculate ... Keywords: 4d-VAR, Chaos, Hurricane Iniki, NWP, Weather modification

R. N. Hoffman; J. M. Henderson; S. M. Leidner; C. Grassotti; T. Nehrkorn

2006-10-01T23:59:59.000Z

66

On sensitivity analysis in the 4dVar framework  

Science Conference Proceedings (OSTI)

The sensitivity of model forecasts to uncertainties in the control variables is evaluated using the adjoint technique and the ensemble generated by the reduced-order 4d variational (R4dVar) algorithm in the framework of twin-data experiments with ...

Max Yaremchuk; Paul Martin

67

Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydration Hydration Water on Rutile Studied by Backscattering Neutron Spectroscopy and Molecular Dynamics Simulation E. Mamontov,* ,† D. J. Wesolowski, ‡ L. Vlcek, § P. T. Cummings, §,| J. Rosenqvist, ‡ W. Wang, ⊥ and D. R. Cole ‡ Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6473, Chemical Sciences DiVision, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6110, Department of Chemical Engineering, Vanderbilt UniVersity, NashVille, Tennessee 37235-1604, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6496, and EnVironmental Sciences DiVision, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6036 ReceiVed: December 20, 2007; ReVised Manuscript ReceiVed: June 4, 2008 The high energy resolution, coupled with the wide dynamic range, of the new backscattering

68

Computer Simulation of 132 / 11 KV Distribution Substation Using Static Var Compensator (SVC) for Voltage Enhancement - A Case Study  

Science Conference Proceedings (OSTI)

With the change in transmitted load in power system, reactive power varies accordingly, which may result into unacceptable voltage variation. This affects the performance of power system parameters like power loss and power factor. This paper deals with ...

M. J. Katira; K. B. Porate

2009-12-01T23:59:59.000Z

69

Energy Employees Occupational Illness Compensation Program Act (EEOICPA)  

NLE Websites -- All DOE Office Websites (Extended Search)

Employees Occupational Illness Compensation Program Act Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System PIA, Office of Business Operations Energy Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System PIA, Office of Business Operations Energy Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System PIA, Office of Business Operations Energy Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System PIA, Office of Business Operations More Documents & Publications Enenrgy Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System, PIA, Savannah River Operations Office Energy Employees' Occupational Illness Compensation Program Act (EEOICPA) Tracking Database, INL Energy Employees' Occupational Illness Compensation

70

Public comment re Convention on Supplementary Compensation Contingent...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

comment re Convention on Supplementary Compensation Contingent Cost Allocation Public comment re Convention on Supplementary Compensation Contingent Cost Allocation DOE published a...

71

DOE Guidance-Approval Process for Dual Compensation Waivers for...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Approval Process for Dual Compensation Waivers for Reemployed Annuitants DOE Guidance-Approval Process for Dual Compensation Waivers for Reemployed Annuitants Guidance Memorandum...

72

Radar Data Assimilation with WRF 4D-Var. Part II: Comparison with 3D-Var for a Squall Line over the U.S. Great Plains  

Science Conference Proceedings (OSTI)

The Weather Research and Forecasting Model (WRF) four-dimensional variational data assimilation (4D-Var) system described in Part I of this study is compared with its corresponding three-dimensional variational data assimilation (3D-Var) system ...

Juanzhen Sun; Hongli Wang

2013-07-01T23:59:59.000Z

73

The Compensation Fund for Climate Impacts  

Science Conference Proceedings (OSTI)

Climate change is very likely to lead to undesirable climate impacts. How to compensate for such negative impacts at the international level has, hitherto, received little attention. This article reviews the most frequently discussed grounds for ...

Detlef F. Sprinz; Steffen von Bünau

2013-07-01T23:59:59.000Z

74

Pressure Compensation and the Bottom Boundary Layer  

Science Conference Proceedings (OSTI)

It is an observed characteristic of oceans that velocities and horizontal pressure gradients are larger new the ocean surface than they are in deeper water. This is conventionally labeled “pressure compensation” whereby baroclinic structure, ...

George L. Mellor; Xiao Hua Wang

1996-10-01T23:59:59.000Z

75

Distribution Efficiency: Modeling, Volt-Var Control, and Economics  

Science Conference Proceedings (OSTI)

As utilities strive to better utilize their distribution system assets and improve energy efficiency, improved distribution modeling and better economic models can help quantify economic gains. In order to improve efficiency modeling and economic planning, research efforts in this report have concentrated on the following tasks: distribution modeling for efficiency studies, volt-var control, and development of a framework to evaluate the economic benefit of reductions in average and peak energy reduction...

2010-12-31T23:59:59.000Z

76

Enenrgy Employees Occupational Illness Compensation Program Act (EEOICPA)  

NLE Websites -- All DOE Office Websites (Extended Search)

Enenrgy Employees Occupational Illness Compensation Program Act Enenrgy Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System, PIA, Savannah River Operations Office Enenrgy Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System, PIA, Savannah River Operations Office Enenrgy Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System, PIA, Savannah River Operations Office Enenrgy Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System, PIA, Savannah River Operations Office More Documents & Publications Energy Employees Occupational Illness Compensation Program Act (EEOICPA) Tracking System PIA, Office of Business Operations PIA - Savannah River Nuclear Solution (SRNS) Energy Employees Occupational Illness Compensation Program Act (EEOICPA)

77

Comparison of the Attributes of VIM + ESR and VIM + VAR Alloy 718  

Science Conference Proceedings (OSTI)

in the world operates. However, VAR process control technology ... from an AC current passing between the electrode and the forming ingot through a resistive.

78

Compensation/Awards | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Compensation/Awards Compensation/Awards Compensation/Awards Headquarters Awards January 1, 2009 A GEM Award (Going the Extra Mile) All Headquarters Department of Energy Employees except Political Appointees (including Schedule C and non-career members of the SES). Any Employee may nominate another employee for this award. July 18, 2008 Article 29 Employee Awards This award is available to all-employees in the Performance Management System whose annual summary rating-of-record is "Meets Expectation" (ME) or higher, udess the employee has been rated at "Needs Improvement" or below on any critical element. All employees rated at or above this level will be nominated for a Performance-Based Cash Award. More headquarters awards Pay, Leave, Absence September 3, 2013

79

Pay and Compensation | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Pay and Compensation Pay and Compensation Pay and Compensation Pay Administration Federal Employees are paid according to guidance set by Government-wide regulations. The grade level of your position and your pay is determined by the duties assigned by management and is set according to those regulations. Pay setting takes into account: The grade of the position The years of experience (or steps) within that grade level. The appropriate salary table of the position. The performance of the employee in the position. Federal agencies are responsible for complying with the law and regulations and following the Office of Personnel Management's (OPM) policies and guidance to administer pay policies and programs for its employees. Pay Changes Notifications All pay changes are documented on a Standard Form 50 (SF-50). Department

80

Public Comment re Convention on Supplementary Compensation for Nuclear  

NLE Websites -- All DOE Office Websites (Extended Search)

Convention on Supplementary Compensation for Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation Public Comment re Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation Comments by International Group on Nuclear Liability (CIGNL), in response to U.S. Department of Energy Notice of Inquiry on Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation, 75 Fed. Reg. 43945 (Jul. 27, 2010) and 75 Fed. Reg. 51986 (Aug. 24, 2010). Public Comment re Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation More Documents & Publications DOE Notice of Inquiry on the Convention on Supplementary Compensation for Nuclear Damage (CSC) Contingent Cost Allocation - March 2, 2011 Meeting

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


81

Laser focus compensating sensing and imaging device  

DOE Patents (OSTI)

A laser focus compensating sensing and imaging device permits the focus of a single focal point of different frequency laser beams emanating from the same source point. In particular it allows the focusing of laser beams originating from the same laser device but having differing intensities so that a low intensity beam will not convert to a higher frequency when passing through a conversion crystal associated with the laser generating device. The laser focus compensating sensing and imaging device uses a cassegrain system to fold the lower frequency, low intensity beam back upon itself so that it will focus at the same focal point as a high intensity beam. An angular tilt compensating lens is mounted about the secondary mirror of the cassegrain system to assist in alignment. In addition cameras or CCD`s are mounted with the primary mirror to sense the focused image. A convex lens in positioned coaxial with the cassegrain system on the side of the primary mirror distal of the secondary for use in aligning a target with the laser beam. A first alternate embodiment includes a cassegrain system using a series of shuttles and an internally mounted dichroic mirror. A second alternate embodiment uses two laser focus compensating sensing and imaging devices for aligning a moving tool with a work piece.

Vann, C.S.

1992-12-31T23:59:59.000Z

82

US-LHC IR magnet error analysis and compensation  

SciTech Connect

This paper studies the impact of the insertion-region (IR) magnet field errors on LHC collision performance. Compensation schemes including magnet orientation optimization, body-end compensation, tuning shims, and local nonlinear correction are shown to be highly effective.

Wei, J.; Ptitsin, V.; Pilat, F.; Tepikian, S. [Brookhaven National Lab., Upton, NY (United States); Gelfand, N.; Wan, W.; Holt, J. [Fermi National Accelerator Lab., Batavia, IL (United States)

1998-08-01T23:59:59.000Z

83

Inductive compensation of operational amplifiers in feedback circuits  

E-Print Network (OSTI)

In this thesis I designed, implemented, and tested an integrated-circuit feedback compensator that uses inductors as compensation elements. Introducing inductors as feedback elements makes it possible to implement lead ...

Adams, Douglas Jay Kozak

2010-01-01T23:59:59.000Z

84

A new soil water content sensor with temperature compensation design  

Science Conference Proceedings (OSTI)

The design and construction of a soil water content sensor with temperature compensation using the piecewise linear interpolation method was presented in this paper. The sensor out put often influenced by temperature, so temperature compensation must ... Keywords: circuitry system, geological disaster, interpolation method, piecewise linear, soil water content sensor, temperature compensation

Shi Ge; Li Qing

2009-05-01T23:59:59.000Z

85

Adaptive friction compensation for permanent magnet linear synchronous motor  

Science Conference Proceedings (OSTI)

The paper discussed an adaptive friction compensation scheme based on Coulomb friction and a parameter identifier. The model reference adaptive system based on Coulomb friction was designed to compensate the friction on-line. The designed model reference ... Keywords: friction compensation, model reference adaptive control, parameter identification, permanent magnet linear synchronous motor (PMLSM)

Wang Li-Mei; Wu Lin

2009-06-01T23:59:59.000Z

86

Selective compensation of voltage harmonics in grid-connected microgrids  

E-Print Network (OSTI)

1 Selective compensation of voltage harmonics in grid-connected microgrids Mehdi Savaghebia , Juan is proposed for selective compensation of main voltage harmonics in a grid- connected microgrid. The aim level. Keywords Distributed Generator (DG); microgrid; grid-connected; voltage harmonics compensation. 1

Vasquez, Juan Carlos

87

ERROR COMPENSATOR FOR A POSITION TRANSDUCER  

DOE Patents (OSTI)

A device is designed for eliminating the effect of leadscrew errors in positioning machines in which linear motion of a slide is effected from rotary motion of a leadscrew. This is accomplished by providing a corrector cam mounted on the slide, a cam follower, and a transducer housing rotatable by the follower to compensate for all the reproducible errors in the transducer signal which can be related to the slide position. The transducer has an inner part which is movable with respect to the transducer housing. The transducer inner part is coupled to the means for rotating the leadscrew such that relative movement between this part and its housing will provide an output signal proportional to the position of the slide. The corrector cam and its follower perform the compensation by changing the angular position of the transducer housing by an amount that is a function of the slide position and the error at that position. (AEC)

Fowler, A.H.

1962-06-12T23:59:59.000Z

88

Comprehensive Environmental Response, Compensation and Recovery Act  

NLE Websites -- All DOE Office Websites (Extended Search)

Comprehensive Environmental Response, Compensation and Recovery Act (CERCLA) Comprehensive Environmental Response, Compensation and Recovery Act (CERCLA) Congress passed the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA, also known as "Superfund") in response to a growing national concern about the release of hazardous substances from abandoned waste sites. Under CERCLA Congress gave the federal government broad authority to regulate hazardous substances, to respond to hazardous substance emergencies, and to develop long-term solutions for the Nation's most serious hazardous waste problems. CERCLA also created a Hazardous Substance Response Trust Fund, supported by an excise tax on feedstock chemicals and petroleum, to pay for cleanup activities at abandoned waste sites. In 1986 CERCLA was reauthorized and amended by the Superfund Amendments and Reauthorization Act (SARA). SARA expanded the federal government's response authorities and clarified that federal facilities are subject to the same CERCLA requirements as private industry. The Community Environmental Response Facilitation Act of 1992 amended the CERCLA provisions dealing with federal activities on any real property owned by the government. It requires the federal government to identify those parts of that real property where no hazardous substance had been stored, released, or disposed of.

89

CEO compensation: a question of ethics  

E-Print Network (OSTI)

The outrageous corporate accounting and fraud scandals in the past years have all but demolished investors' faith in our accounting framework. One big area of concern is executive compensation. In 1992, Congress enacted section 162(m) of the Internal Revenue Code, which limited executive compensation that is deductible to one million dollars a year. As an alternative, stock option plans have gained popularity. The reporting for these plans is very controversial however, as different methods produce vastly different expenses, both in size and timing. Another concern of many investors is earnings management, the concept of timing revenues and expenses in order to steady and inflate earnings. This has many implications within executive reporting as the method chosen can greatly affect compensation expense, both in size and consistency, and thus manage earnings. This paper will focus on both deontological and teleological ethical models in order to show the inherent inconsistencies contained within the intrinsic method of option reporting. The study also demonstrates ethical standards already existing within the accounting field which are irreconcilable with the intrinsic method of reporting. Both teleological and deontological models are used to demonstrate the current required method's shortfalls and prove the fair value method does not in fact violate the principles.

Cole, James Harrison

2004-01-01T23:59:59.000Z

90

On the Sensitivity Equations of Four-Dimensional Variational (4D-Var) Data Assimilation  

Science Conference Proceedings (OSTI)

The equations of the forecast sensitivity to observations and to the background estimate in a four-dimensional variational data assimilation system (4D-Var DAS) are derived from the first-order optimality condition in unconstrained minimization. ...

Dacian N. Daescu

2008-08-01T23:59:59.000Z

91

Experimental 4D-Var Assimilation of SYNOP Rain Gauge Data at ECMWF  

Science Conference Proceedings (OSTI)

Four-dimensional variational data assimilation (4D-Var) experiments with 6-hourly rain gauge accumulations observed at synoptic stations (SYNOP) around the globe have been run over several months, both at high resolution in an ECMWF operations-...

Philippe Lopez

2013-05-01T23:59:59.000Z

92

Adaptive Ensemble Covariance Localization in Ensemble 4D-VAR State Estimation  

Science Conference Proceedings (OSTI)

An adaptive ensemble covariance localization technique, previously used in “local” forms of the ensemble Kalman filter, is extended to a global ensemble four-dimensional variational data assimilation (4D-VAR) scheme. The purely adaptive part of ...

Craig H. Bishop; Daniel Hodyss

2011-04-01T23:59:59.000Z

93

Satellite Radiance Assimilation in the JMA Operational Mesoscale 4D-Var System  

Science Conference Proceedings (OSTI)

The direct radiance assimilation scheme used in the Japan Meteorological Agency (JMA) global analysis system is applied to the JMA mesoscale 4-dimensional variational (4D-Var) system with two modifications. First, the data thinning distance is ...

Masahiro Kazumori

94

Effect of Helium Cooling on VAR Ingot Quality of Alloy 718  

Science Conference Proceedings (OSTI)

m2 (kg/h). = 43.5(kA. - 0.7). In general, the specific energy consumption. (kWh/kg) in VAR tends to decrease with increasing power inputs which was confirmed in.

95

Self-compensating tensiometer and method  

SciTech Connect

A pressure self-compensating tensiometer and method to in situ determine below grade soil moisture potential of earthen soil independent of changes in the volume of water contained within the tensiometer chamber, comprising a body having first and second ends, a porous material defining the first body end, a liquid within the body, a transducer housing submerged in the liquid such that a transducer sensor within the housing is kept below the working fluid level in the tensiometer and in fluid contact with the liquid and the ambient atmosphere.

Hubbell, Joel M. (Idaho Falls, ID); Sisson, James B. (Idaho Falls, ID)

2003-01-01T23:59:59.000Z

96

Tevatron beam-beam compensation project progress  

SciTech Connect

In this paper, we report the progress of the Tevatron Beam-Beam Compensation (BBC) project [1]. Electron beam induced proton and antiproton tuneshifts have been reported in [2], suppression of an antiproton emittance growth has been observed, too [1]. Currently, the first electron lens (TEL1) is in operational use as the Tevatron DC beam cleaner. We have made a lot of the upgrades to improve its stability [3]. The 2nd Tevatron electron lens (TEL2) is under the final phase of development and preparation for installation in the Tevatron.

Shiltsev, V.; Zhang, X.L.; Kuznetsov, G.; Pfeffer, H.; Saewert, G.; /Fermilab; Zimmermann, F.; /CERN; Tiunov, M.; /Novosibirsk, IYF; Bishofberger, K.; /UCLA; Bogdanov, I.; Kashtanov, E.; Kozub, S.; Sytnik, V.; Tkachenko, L.; /Serpukhov, IHEP

2005-05-01T23:59:59.000Z

97

Convention on Supplementary Compensation Notice of Inquiry and Public  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Convention on Supplementary Compensation Notice of Inquiry and Convention on Supplementary Compensation Notice of Inquiry and Public Comments Convention on Supplementary Compensation Notice of Inquiry and Public Comments In an effort to assist the Department of Energy in its development of regulations pursuant to section 934 of the Energy Independence and Security Act of 2007 (EISA), the DOE General Counsel's office issued a Notice of Inquiry (NOI) in July 2010. The Convention on Supplementary Compensation for Nuclear Damage (CSC) provides for a global nuclear liability regime assuring prompt and equitable compensation in the event of certain nuclear incidents, and features the creation of an international fund to supplement the amount of compensation available for nuclear damage resulting from such incidents. Section 934 of the EISA authorizes the Secretary of Energy to

98

Public Comment re Convention on Supplementary Compensation for Nuclear  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Public Comment re Convention on Supplementary Compensation for Public Comment re Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation Public Comment re Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation Comments by International Group on Nuclear Liability (CIGNL), in response to U.S. Department of Energy Notice of Inquiry on Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation, 75 Fed. Reg. 43945 (Jul. 27, 2010) and 75 Fed. Reg. 51986 (Aug. 24, 2010). Public Comment re Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation More Documents & Publications CIGNLCommentsDOECSCRulemaking11-30-10.doc DOE Notice of Inquiry on the Convention on Supplementary Compensation for Nuclear Damage (CSC) Contingent Cost Allocation - March 2, 2011 Meeting

99

Compensated gain control circuit for buck regulator command charge circuit  

DOE Patents (OSTI)

A buck regulator command charge circuit includes a compensated-gain control signal for compensating for changes in the component values in order to achieve optimal voltage regulation. The compensated-gain control circuit includes an automatic-gain control circuit for generating a variable-gain control signal. The automatic-gain control circuit is formed of a precision rectifier circuit, a filter network, an error amplifier, and an integrator circuit.

Barrett, David M. (Albuquerque, NM)

1996-01-01T23:59:59.000Z

100

Motor torque compensation of an induction electric motor by ...  

Motor torque compensation of an induction electric motor by adjusting a slip command during periods of supposed change in motor temperature United States Patent

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


101

Public comment re Convention on Supplementary Compensation on...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Public comment re Convention on Supplementary Compensation on Nuclear Damage Contingent Cost Allocation Comments by the Nuclear Energy Institute (NEI) on Convention on...

102

Public Comment re Convention on Supplementary Compensation for...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Public Comment re Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation Comments by International Group on Nuclear Liability (CIGNL), in response...

103

Approval Process for Dual Compensation Waivers for Reemployed...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DIRECTOR OFFICE 0 UMAN CAPITAL MANAGEMENT SUBJECT: POLICY MEMORANDUM 11: APPROVAL PROCESS FOR DUAL COMPENSATION WAIVERS FOR REEMPLOYED ANNUITANTS Section 1122 of the National...

104

DOE Notice of Inquiry on the Convention on Supplementary Compensation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Notice of Inquiry on the Convention on Supplementary Compensation for Nuclear Damage (CSC) Contingent Cost Allocation - March 2, 2011 Meeting with CIGNL DOE Notice of Inquiry on...

105

Background compensation for a radiation level monitor  

DOE Patents (OSTI)

Background compensation in a device such as a hand and foot monitor is provided by digital means using a scaler. With no radiation level test initiated, a scaler is down-counted from zero according to the background measured. With a radiation level test initiated, the scaler is up-counted from the previous down-count position according to the radiation emitted from the monitored object and an alarm is generated if, with the scaler having crossed zero in the positive going direction, a particular number is exceeded in a specific time period after initiation of the test. If the test is initiated while the scale is down-counting, the background count from the previous down- count stored in a memory is used as the initial starting point for the up-count.

Keefe, D.J.

1975-12-01T23:59:59.000Z

106

Feedback based adaptive compensation of control system sensor uncertainties  

Science Conference Proceedings (OSTI)

In this paper, the problem of adaptively compensating sensor uncertainties is addressed in a feedback based framework. In this study, sensor characteristics are modeled as parametrizable uncertain functions and a compensator is constructed to adaptively ... Keywords: Adaptive control, Adaptive systems, Sensor and data fusion, Tracking and adaptation

Shanshan Li; Gang Tao

2009-02-01T23:59:59.000Z

107

Combining robust detection and anti-windup compensation for FTC  

Science Conference Proceedings (OSTI)

In this contribution, a method for implementation of AWBT compensation, when the residual signal can not be measured, is presented. The approach consists into estimate the residual signal from a FDI filter. In this case, the residual signal is considered ... Keywords: anti-windup compensation, fault detection, fault-tolerant control, robust control

Addison Rios-Bolivar; Richard Marquez

2006-07-01T23:59:59.000Z

108

Secondary Control for Voltage Unbalance Compensation in an Islanded Microgrid  

E-Print Network (OSTI)

Secondary Control for Voltage Unbalance Compensation in an Islanded Microgrid Mehdi Savaghebi1 microgrid. The aim of the proposed control approach is to enhance the voltage quality at the point of common unbalance. Keywords-distributed generation; microgrid; secondary control; voltage unbalance compensation I

Vasquez, Juan Carlos

109

Linear signal-compensated amplifier for reactor power measuring channels  

Science Conference Proceedings (OSTI)

A linear amplifier with automatic signal compensation has been developed for nuclear channels. The amplifiercontrols its sensitivity automatically according to the reference input within the desired settings and has automatic signal compensation capability for use in the nuclear channels. The amplifier will be used in the existing safety channel of Pakistan Research Reactor-1

M. Tahir Khaleeq; Atique-ur-Rahman; Eijaz Ahmed

2006-01-01T23:59:59.000Z

110

Mismatch modeling and compensation for robust speaker verification  

Science Conference Proceedings (OSTI)

In this study, primary channel mismatch scenario between enrollment and test conditions in a speaker verification task are analyzed and modeled. A novel Gaussian mixture modeling with a universal background model (GMM-UBM) frame based compensation model ... Keywords: Eigenchannel, Factor analysis, Mismatch compensation, Speaker verification

Yun Lei; John H. L. Hansen

2011-02-01T23:59:59.000Z

111

Worker's Compensation for Supervisors Briefing | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Worker's Compensation for Supervisors Briefing Worker's Compensation for Supervisors Briefing Worker's Compensation for Supervisors Briefing September 25, 2013 9:00AM to 1:00PM EDT Registration link: CHRIS (002497/0003) Course type: Classroom Course Location: DOE Forrestal Building, Room 8E-089 Course Description: The briefing will give first level supervisors/managers a broader range of information that will enable Department of Energy supervisors to follow proper procedures and control compensation costs. The briefing will provide information on the topics related to the supervisor's responsibility when employees file a claim, the types of claims, medical and monetary compensation involved in covering the injured worker. The training will also cover the Power Initiative to get employees back to work and the agency's responsibility in reducing lost

112

Analytical modeling of a hydraulically-compensated compressed-air energy-storage system  

Science Conference Proceedings (OSTI)

A computer program was developed to calculate the dynamic response of a hydraulically-compensated compressed air energy storage (CAES) system, including the compressor, air pipe, cavern, and hydraulic compensation pipe. The model is theoretically based on the two-fluid model in which the dynamics of each phase are presented by its set of conservation equations for mass and momentum. The conservation equations define the space and time distribution of pressure, void fraction, air saturation, and phase velocities. The phases are coupled by two interface equations. The first defines the rate of generation (or dissolution) of gaseous air in water and can include the effects of supersaturation. The second defines the frictional shear coupling (drag) between the gaseous air and water as they move relative to each other. The relative motion of the air and water is, therefore, calculated and not specified by a slip or drift-velocity correlation. The total CASE system is represented by a nodal arrangement. The conservation equations are written for each nodal volume and are solved numerically. System boundary conditions include the air flow rate, atmospheric pressure at the top of the compensation pipe, and air saturation in the reservoir. Initial conditions are selected for velocity and air saturation. Uniform and constant temperature (60/sup 0/F) is assumed. The analytical model was used to investigate the dynamic response of a proposed system.Investigative calculations considered high and low water levels, and a variety of charging and operating conditions. For all cases investigated, the cavern response to air-charging, was a damped oscillation of pressure and flow. Detailed results are presented. These calculations indicate that the Champagne Effect is unlikely to cause blowout for a properly designed CAES system.

McMonagle, C.A.; Rowe, D.S.

1982-12-01T23:59:59.000Z

113

An analysis of agricultural education faculty compensation systems  

E-Print Network (OSTI)

The American Federation of Teachers (2001) noted that to ensure all students are successful, teacher salaries must be commensurate with teacher performance. Studies, however, have shown this is not occurring. In order to recruit, retain, and reward the best agricultural education faculty, research on this topic is needed to ensure faculty are compensated fairly and compensation systems are aligned with merit, motivation, performance, retention, environmental and financial needs of educators. The purpose of this descriptive and correlational research was to examine agricultural education faculty perceptions of faculty compensation levels and compensation practices. Systematic sampling procedures were used to identify participants (N=196) for the study. 154 post-secondary agricultural education faculty members participated in the study. Faculty compensation level scores and compensation practice scores were computed and compared to personal characteristics. Over 60% of participants indicated their compensation level was too low. Overall, faculty compensation level scores tended to be negative. Faculty compensation level scores tended to increase when: faculty perceived interdepartmental salary to be fair; faculty perceived salary by rank to be similar at their university; faculty perceived internal equity of salaries at their department across rank; and faculty perceived salary by rank to be similar at other universities. Overall, faculty compensation practice scores tended to be negative. Faculty compensation practice scores tended to be higher when: yearly evaluations were conducted; counteroffers were considered; interdepartmental salary was fair; salary by rank was fair; and merit based pay systems were used. Recommendations for pay for performance are provided. Faculty members with low compensation level scores may also want to consider other employment opportunities, ask for a raise, or garner counteroffers. Recommendations for ensuring internal and external equity of salaries are provided. Administrators should not wait for problems to occur before attempting to align compensation practices with employee needs and performance. Failure to ensure internally and externally fair wages may result in increased frustration, low job satisfaction, and demotivation at best, and job-hopping, counteroffer hunting, resentment, and disruptions in the workplace at worse.

Wicks, Aaron-Marie

2002-01-01T23:59:59.000Z

114

Compensated vibrating optical fiber pressure measuring device  

SciTech Connect

A microbending optical fiber is attached under tension to a diaphragm to se a differential pressure applied across the diaphragm which it causes it to deflect. The fiber is attached to the diaphragm so that one portion of the fiber, attached to a central portion of the diaphragm, undergoes a change in tension; proportional to the differential pressure applied to the diaphragm while a second portion attached at the periphery of the diaphragm remains at a reference tension. Both portions of the fiber are caused to vibrate at their natural frequencies. Light transmitted through the fiber is attenuated by both portions of the tensioned sections of the fiber by an amount which increases with the curvature of fiber bending so that the light signal is modulated by both portions of the fiber at separate frequencies. The modulated light signal is transduced into a electrical signal. The separate modulation signals are detected to generate separate signals having frequencies corresponding to the reference and measuring vibrating sections of the continuous fiber, respectively. A signal proportional to the difference between these signals is generated which is indicative of the measured pressure differential across the diaphragm. The reference portion of the fiber is used to compensate the pressure signal for zero and span changes resulting from ambient temperature and humidity effects upon the fiber and the transducer fixture.

Fasching, George E. (Morgantown, WV); Goff, David R. (Christiansburg, VA)

1987-01-01T23:59:59.000Z

115

Compensation for the NADW Outflow in a Global Ocean General Circulation Model  

Science Conference Proceedings (OSTI)

Recent observational study on the compensation for the North Atlantic Deep Water (NADW) outflow suggested that the compensation flow loops into the south Indian Ocean, whereby the compensating water gains heat and salt before returning to the ...

Wenju Cai; Richard J. Greatbatch

1995-02-01T23:59:59.000Z

116

Die Face Engineering based Springback Compensation Strategy and Implementation  

SciTech Connect

Springback or shape change has been one of the major challenges in sheet metal fabrication, particularly with increase application of high strength steel (HSS) and aluminum alloys in automotive stamping. Springback, an elastic material recovery after the unloading of stamping tools, causes variations and inconsistencies of final part dimensions. Minor or mild springback usually can be corrected in the re-strike process. Excessive springback must be corrected so the part will be produced within the given design tolerance and dimension. The commonly used Spring Forward approaches and shape compensations such as over-crown and over-bending are proven effective to alleviate excessive springback. To enhance these approaches, a new strategy of Die Face Engineering (DFE) based processing is proposed to quickly and easily to achieve the maximum allowable compensation using the under cut (or die lock) as the primary criteria. The implementation of the die face compensation through iterative FEA calculation, automatic surface mapping, projection and manual morphing are crucial to meet production environment requirements in terms of generating NC quality CAD surfaces of the compensated or morphed die face. In this paper, the strategy of the die face compensation with the consideration of the under cut criteria is presented. The implementation of various processes to enable user to perform the die face compensation task in a production environment is also discussed. Finally, two examples are shown to demonstrate the implementation of the proposed springback compensation scheme based on the combined CAE/CAD methodology.

Tang, Arthur; Lee Wing; He, Jeanne; Xu Jinbo; Liu Kesu; Chen Chinchun [Engineering Technology Associates, Inc., Troy, Michigan (United States)

2005-08-05T23:59:59.000Z

117

Linear signal-compensated amplifier for reactor power measuring channels  

Science Conference Proceedings (OSTI)

A linear amplifier with automatic signal compensation has been developed for nuclear channels. The amplifier controls its sensitivity automatically according to the reference input within the desired settings and has automatic signal compensation capability for use in the nuclear channels. The amplifier will be used in the existing safety channel of Pakistan Research Reactor-1, where the system has an independent sensitivity control unit for manual compensation of xenon effect. The new amplifier will improve the safety of the system. The amplifier is tested and the results found are in very good agreement with the designed specifications. This article presents design and construction of the amplifier and test results.

Khaleeq, M. Tahir; Atique-ur-Rahman,; Ahmed, Eijaz [Electronics Division, PINSTECH, Islamabad 44000 (Pakistan); F. G. Post Graduate College H-8, Islamabad, 44000 (Pakistan)

2006-07-15T23:59:59.000Z

118

Potential of 4d-VAR for exigent forecasting of severe weather  

E-Print Network (OSTI)

Severe storms, tropical cyclones, and associated tornadoes, floods, lightning, and microbursts threaten life and property. Reliable, precise, and accurate alerts of these phenomena can trigger defensive actions and preparations. However, these crucial weather phenomena are difficult to forecast. The objective of this paper is to demonstrate the potential of 4d-VAR (four dimensional variational data assimilation) for exigent forecasting (XF) of severe storm precursors and to thereby characterize the probability of a worst-case scenario. 4d-VAR is designed to adjust the initial conditions (IC) of a numerical weather prediction model consistent with the uncertainty of the prior estimate of the IC while at the same time minimizing the misfit to available observations. For XF the same approach is taken but instead of fitting observations, a measure of damage or loss or an equivalent proxy is maximized or minimized. To accomplish this will require development of a specialized cost function for 4d-VAR. When 4d-VAR s...

Hoffman, Ross N; Nehrkorn, Thomas

2011-01-01T23:59:59.000Z

119

Estimates of Analysis and Forecast Error Variances Derived from the Adjoint of 4D-Var  

Science Conference Proceedings (OSTI)

A method is presented in which the adjoint of a four-dimensional variational data assimilation system (4D-Var) was used to compute the expected analysis and forecast error variances of linear functions of the ocean state vector. The power and ...

Andrew M. Moore; Hernan G. Arango; Gregoire Broquet

2012-10-01T23:59:59.000Z

120

A Penalized 4-D Var data assimilation method for reducing forecast M. J. Hossen  

E-Print Network (OSTI)

A Penalized 4-D Var data assimilation method for reducing forecast error M. J. Hossen Department and observations improves the forecast. The targeted observations determined by using a targeting method, for instance adjoint sensitivity, observation sensitivity or singular vector may further improve the forecast

Navon, Michael

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


121

A Basic Overview of the Energy Employees Occupational Illness Compensation  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A Basic Overview of the Energy Employees Occupational Illness A Basic Overview of the Energy Employees Occupational Illness Compensation Program A Basic Overview of the Energy Employees Occupational Illness Compensation Program July 2009 A Basic Overview of the Energy Employees Occupational Illness Compensation Program This pamphlet is developed by the Department of Energy (DOE) as an outreach and awareness tool to assist former and current DOE Federal, contractor, and subcontractor employees to become familiar with and utilize the services and benefits authorized under the Energy Employees Occupational Illness Compensation Program Act (EEOIPCA). There are several Federal entities that support implementation of EEOICPA. Each of these entities serves a critical and unique role in this process. Briefly, the Department of Labor's (DOL) Office of Workers'

122

Energy Employees Occupational Illness Compensation Program | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy Employees Occupational Energy Employees Occupational Illness Compensation Program Energy Employees Occupational Illness Compensation Program The Energy Employees Occupational Illness Compensation Program Act (EEOICPA) was enacted to provide compensation and medical benefits to employees who worked at certain Department of Energy (DOE) facilities, including contractors and subcontractors at those locations, and certain of its vendors. Adjudication of issues pertaining to all claims for benefits under the EEOICPA is the responsibility of the Department of Labor (DOL). The DOL is supported in its role by the DOE, the Department of Health and Human Services (HHS), and the Department of Justice (DOJ). If you would like more information about the benefits available under the EEOICPA, please visit DOL's web page or see the EEOICPA pamphlet.

123

DOE Announces Webinar on Tying Energy Efficiency to Compensation and  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Webinar on Tying Energy Efficiency to Compensation Webinar on Tying Energy Efficiency to Compensation and Performance Reviews, and More DOE Announces Webinar on Tying Energy Efficiency to Compensation and Performance Reviews, and More August 30, 2013 - 12:00pm Addthis EERE offers webinars to the public on a range of subjects, from adopting the latest energy efficiency and renewable energy technologies to training for the clean energy workforce. Webinars are free; however, advanced registration is typically required. You can also watch archived webinars and browse previously aired videos, slides, and transcripts. Upcoming Webinars September 3: Live Webinar on Tying Energy Efficiency to Compensation and Performance Reviews Webinar Sponsor: EERE's Better Buildings Challenge The Energy Department will present a live webinar titled "Tying Energy

124

Biomass Equipment and Materials Compensating Tax Deduction | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Biomass Equipment and Materials Compensating Tax Deduction Biomass Equipment and Materials Compensating Tax Deduction Biomass Equipment and Materials Compensating Tax Deduction < Back Eligibility Commercial Industrial Savings Category Bioenergy Biofuels Alternative Fuel Vehicles Commercial Heating & Cooling Manufacturing Buying & Making Electricity Hydrogen & Fuel Cells Wind Maximum Rebate None Program Info Start Date 6/17/2005 State New Mexico Program Type Sales Tax Incentive Rebate Amount 100% of value may be deducted for purposes of calculating Compensating Tax due Provider New Mexico Taxation and Revenue Department In 2005 New Mexico adopted a policy to allow businesses to deduct the value of biomass equipment and biomass materials used for the processing of biopower, biofuels or biobased products in determining the amount of

125

Energy Spread Compensation for Multi-Bunch Linac Operation Mode  

NLE Websites -- All DOE Office Websites (Extended Search)

ENERGY SPREAD COMPENSATION FOR MULTI-BUNCH LINAC OPERATION MODE D. Mihalcea, Northern Illinois University, DeKalb, IL 60115, USA W. Gai, J. G. Power, ANL, Argonne, IL 60439, USA...

126

Stability Improvement of Wind Farms using Shunt and Series Compensation  

E-Print Network (OSTI)

. A comparison is made between the power converter of doubly fed induction generator (DFIG) and static synchronous compensator (STATCOM) for stability improvement of wind farms in normal and faulty condition. DFIG

Pota, Himanshu Roy

127

Compensation between Model Feedbacks and Curtailment of Climate Sensitivity  

Science Conference Proceedings (OSTI)

The spread in climate sensitivity obtained from 12 general circulation model runs used in the Fourth Assessment of the Intergovernmental Panel on Climate Change indicates a 95% confidence interval of 2.1°–5.5°C, but this reflects compensation ...

Peter Huybers

2010-06-01T23:59:59.000Z

128

DOE Announces Webinar on Tying Energy Efficiency to Compensation...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

to Compensation and Performance Reviews, and More August 30, 2013 - 12:00pm Addthis EERE offers webinars to the public on a range of subjects, from adopting the latest energy...

129

Impacts of Varying Penetration of Distributed Resources with & without Volt/Var Control: Case Study of Varying Load Types  

SciTech Connect

This paper provides a follow-up to an earlier one on impacts of distributed energy resources (DR) on distribution feeders. As DR penetration level on the feeder increases, there can be impacts to distribution system/feeder capacity, line losses, and voltage regulation. These can vary as the penetration level reaches the capacity of the distribution feeder/system or loading. The question is how high of a DR level can be accommodated without any major changes to system operation, system design and protection. Our objective for this work was to address the question of how the DR impacts vary in regards to both DR voltage regulation capability and load mix. A dynamic analysis was used to focus on the impacts of DR with and without volt/var control with different load composition on the distribution feeder. The study considered an example 10MVA distribution feeder in which two inverter-based DRs were used to provide voltage regulation. The results due to DR without voltage regulation capability are compared with DR capable of providing local (at its bus) voltage regulation. The analysis was repeated for four different feeder load compositions consisting of (1) constant power, (2) constant impedance, (3) constant current and (4) ZIP (equal combination of previous three).

Rizy, D Tom [ORNL; Li, Huijuan [ORNL; Li, Fangxing [ORNL; Xu, Yan [ORNL; Adhikari, Sarina [ORNL; Irminger, Philip [ORNL

2011-01-01T23:59:59.000Z

130

20 MHz IF bandpass switched capacitor [] modulator using a high performance OTA with NCFF compensation scheme  

E-Print Network (OSTI)

Switched capacitor (SC) circuits are widely used in many applications because of their accuracy and ease of integration in CMOS technology. They are not suitable for operation in high frequencies because of the settling time limitation of amplifiers. High frequency switched capacitor circuits pose challenging design specifications on the amplifiers which cannot be met by conventional circuit design techniques. High amplifier gain is required for an accurate output, whereas fast settling time is obtained by a high gainbandwidth (GBW) product. Amplifiers that use cascading of gain stages for obtaining high gain require some robust frequency compensation schemes, and usually have a low GBW, resulting in a slow settling time. This work proposes a new compensation scheme for high gain wideband amplifiers - No Capacitor Feed Forward (NCFF) compensation scheme. NCFF scheme uses pole-zero cancellation to obtain high gain, high GBW and a good phase margin. Left half plane (LHP) zeros produced due to the feedforward path causes a positive phase shift and is used to cancel the negative phase shift of poles. Fully differential and single ended operational transconductance amplifiers (OTA) using the proposed NCFF compensation scheme have been designed and fabricated using CMOS AMI 0.5 []m technology. The fully differential OTA has a gain of 97 dB, GBW of 350 MHz and a phase margin of around 90°. Sigma delta [ ] modulators use oversampling and quantization noise shaping to obtain a high dynamic range. They are well suited for use in radio and cellular systems to directly convert the narrowband IF signal centered at high frequencies to digital domain. Switched capacitor implementation of a [ ] modulator requires a fast settling amplifier to operate at high IF frequencies. The design and implementation issues of a 20 MHz IF, 80 MHz clock, fourth order switched capacitor bandpass [ ] modulator are discussed in detail. The modulator uses a high performance OTA using the proposed NCFF compensation scheme and it has been designed and fabricated using 3.3V CMOS TSMC 0.35 []m technology. The bandpass [ ] modulator has a peak SNR of 70 dB (post-layout simulations).

Thandri, Bharath Kumar

2001-01-01T23:59:59.000Z

131

A Dynamic Wind Turbine Simulator of the Wind Turbine Generator System  

Science Conference Proceedings (OSTI)

To study dynamic performances of wind turbine generator system (WTGS), and to determine the control structures in laboratory. The dynamic torque generated by wind turbine (WT) must be simulated. In there paper, a dynamic wind turbine emulator (WTE) is ... Keywords: dynamic wind turbine emulation, wind shear, tower shadow, torque compensation

Lei Lu; Zhen Xie; Xing Zhang; Shuying Yang; Renxian Cao

2012-01-01T23:59:59.000Z

132

Experience with the procurement of ferrite and temperature compensator for permanent magnets for accelerators  

E-Print Network (OSTI)

Experience with the procurement of ferrite and temperature compensator for permanent magnets for accelerators

Fowler, W B; Volk, J T

1998-01-01T23:59:59.000Z

133

Approval Process for Dual Compensation Waivers for Reemployed Annuitants  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

10 10 MEMORANDUM FOR HUMAN RESOURCE DIRECTORS ~~~ - FROM: SARAH J. NILLA, DIRECTOR OFFICE 0 UMAN CAPITAL MANAGEMENT SUBJECT: POLICY MEMORANDUM # 11: APPROVAL PROCESS FOR DUAL COMPENSATION WAIVERS FOR REEMPLOYED ANNUITANTS Section 1122 of the National Defense Authorization Act for Fiscal Year 2010, Public Law 111-84 (Pub. L 111-84) allows the head of an agency to grant dual compensation (salary-offset) waivers to reemployed annuitants who work on a limited basis without reduction to their retirement annuity. This provision in the law expires October 27, 2014. Secretary Chu has delegated the authority to approve all dual compensation waiver requests to the Department's Chief Human Capital Officer (CHCO). This authority can be used to: a) Fulfill functions critical to the mission of the agency (or any subcomponent of

134

Case Study on Conservation Voltage Reduction and Volt-VAR Optimization: Sacramento Municipal Utility District  

Science Conference Proceedings (OSTI)

As part of its SmartSacramento® Project, SMUD tested two control strategies for improving distribution efficiency: conservation voltage reduction (CVR) and volt-VAR optimization (VVO).  SMUD, in conjunction with The Structure Group, enhanced existing control logic and developed new control logic to implement these two control strategies via SMUD’s existing Siemens SCADA system.This case study presents results of a SMUD  pilot in the summer of 2011 to demonstrate the ...

2012-10-31T23:59:59.000Z

135

How Dynamic Consumer Response, Competitor Response, Company Support, and Company Inertia Shape Long-Term Marketing Effectiveness  

Science Conference Proceedings (OSTI)

Long-term marketing effectiveness is a high-priority research topic for managers, and emerges from the complex interplay among dynamic reactions of several market players. This paper introduces restricted policy simulations to distinguish four dynamic ... Keywords: company inertia and support, dynamic consumer and competitor response, impulse-response functions, long-term marketing effectiveness, policy simulation restrictions, postpromotion dip, vector autoregressive (VAR) models

Koen Pauwels

2004-09-01T23:59:59.000Z

136

Optimal Inverter VAR Control in Distribution Systems with High PV Penetration  

E-Print Network (OSTI)

The intent of the study detailed in this paper is to demonstrate the benefits of inverter var control on a fast timescale to mitigate rapid and large voltage fluctuations due to the high penetration of photovoltaic generation and the resulting reverse power flow. Our approach is to formulate the volt/var control as a radial optimal power flow (OPF) problem to minimize line losses and energy consumption, subject to constraints on voltage magnitudes. An efficient solution to the radial OPF problem is presented and used to study the structure of optimal inverter var injection and the net benefits, taking into account the additional cost of inverter losses when operating at non-unity power factor. This paper will illustrate how, depending on the circuit topology and its loading condition, the inverter's optimal reactive power injection is not necessarily monotone with respect to their real power output. The results are demonstrated on a distribution feeder on the Southern California Edison system that has a very ...

Farivar, Masoud; Clarke, Christopher; Low, Steven

2011-01-01T23:59:59.000Z

137

THE COMPENSATION CONVENTION: PATH TO A GLOBAL REGIME FOR DEALING WITH LEGAL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

THE COMPENSATION CONVENTION: PATH TO A GLOBAL REGIME FOR DEALING THE COMPENSATION CONVENTION: PATH TO A GLOBAL REGIME FOR DEALING WITH LEGAL LIABILITY AND COMPENSATION FOR NUCLEAR DAMAGE THE COMPENSATION CONVENTION: PATH TO A GLOBAL REGIME FOR DEALING WITH LEGAL LIABILITY AND COMPENSATION FOR NUCLEAR DAMAGE The adoption of the Convention on Supplementary Compensation for Nuclear Damage (Compensation Convention) opens a new chapter in international nuclear liability law. The Compensation Convention provides the world community with the opportunity to deal with legal liability and compensation for nuclear damage through a global regime that includes all countries that operate nuclear powerplants (nuclear power generating countries) and most countries that do not operate nuclear powerplants (nonnuclear power generating countries). Such a global regime can remove

138

SUSPENSION VIBRATION COMPENSATION USING A MEMS MICROACTUATOR IN HARD  

E-Print Network (OSTI)

SUSPENSION VIBRATION COMPENSATION USING A MEMS MICROACTUATOR IN HARD DISK DRIVES Tsung-Lin Chen density and spindle rotation speed in hard disk drives, airflow excited suspension vibration (windage with the MA (Li and Horowitz, 2001a). Several MA designs have been proposed for dual- stage actuation in hard

Horowitz, Roberto

139

Temperature compensated and self-calibrated current sensor  

DOE Patents (OSTI)

A method is described to provide temperature compensation and reduction of drift due to aging for a current sensor based on a plurality of magnetic field sensors positioned around a current carrying conductor. The offset voltage signal generated by each magnetic field sensor is used to correct variations in the output signal due to temperature variations and aging.

Yakymyshyn, Christopher Paul (Seminole, FL); Brubaker, Michael Allen (Loveland, CO); Yakymyshyn, Pamela Jane (Seminole, FL)

2007-09-25T23:59:59.000Z

140

A new blowdown compensation scheme for boiler leak detection  

E-Print Network (OSTI)

A new blowdown compensation scheme for boiler leak detection A. M. Pertew ,1 X. Sun ,1 R. Kent considers the blowdown effect in industrial boiler operation. This adds to the efficiency of recent advances in identification-based leak detection techniques of boiler steam- water systems. Keywords: Industrial Boilers, Tube

Marquez, Horacio J.

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


141

Motion Compensation Hardware Accelerator Architecture for H.264/AVC  

E-Print Network (OSTI)

University of Pelotas Pelotas ­ RS ­ BRAZIL 3 Electrical Engineering Department Federal University of Rio by simulation. A performance comparison was made between a software implementation and a hardware accelerated is enough to reach real time when decoding H.264/AVC Baseline Profile motion compensation for luminance

Wagner, Flávio Rech

142

Compensated count-rate circuit for radiation survey meter  

DOE Patents (OSTI)

A count-rate compensating circuit is provided which may be used in a portable Geiger-Mueller (G-M) survey meter to ideally compensate for couting loss errors in the G-M tube detector. In a G-M survey meter, wherein the pulse rate from the G-M tube is converted into a pulse rate current applied to a current meter calibrated to indicate dose rate, the compensation circuit generates and controls a reference voltage in response to the rate of pulses from the detector. This reference voltage is gated to the current-generating circuit at a rate identical to the rate of pulses coming from the detector so that the current flowing through the meter is varied in accordance with both the frequency and amplitude of the reference voltage pulses applied thereto so that the count rate is compensated ideally to indicate a true count rate within 1% up to a 50% duty cycle for the detector. A positive feedback circuit is used to control the reference voltage so that the meter output tracks true count rate indicative of the radiation dose rate.

Todd, R.A.

1980-05-12T23:59:59.000Z

143

Hierarchical Control Scheme for Voltage Unbalance Compensation in Islanded Microgrids  

E-Print Network (OSTI)

Hierarchical Control Scheme for Voltage Unbalance Compensation in Islanded Microgrids Mehdi@et.aau.dk Abstract-- The concept of microgrid hierarchical control is presented, recently. In this paper, a hierarchical scheme which includes primary and secondary control levels is proposed for islanded microgrids

Vasquez, Juan Carlos

144

Interline photovoltaic (I-PV) power plants for voltage unbalance compensation  

E-Print Network (OSTI)

This paper proposes a stationary-frame control method for voltage unbalance compensation using Interline Photovoltaic (I-PV) power system. I-PV power systems are controlled to compensate voltage unbalance autonomously. The ...

Moawwad, Ahmed

145

On the development of a multiple-compensation mechanism for business transactions  

Science Conference Proceedings (OSTI)

Compensation is a widely used concept for maintaining atomicity in both the advanced transaction models and transactional workflow systems. Some Web service protocols also adopt the compensation mechanism for failure recovery when providing transaction ...

Zaihan Yang; Chengfei Liu

2006-06-01T23:59:59.000Z

146

A Survey on the Principle and Control of Dynamic Voltage Restorer  

Science Conference Proceedings (OSTI)

With the development of information and automation techniques, dynamic voltage problems are once again in the spotlight. Dynamic voltage restorer (DVR) is a modern and important custom power device used for mitigating voltage sags in power distribution ... Keywords: voltage sag, dynamic voltage restorer (DVR), control strategy, power quality, optimized compensation, energy storage

Shuhong Kong; Zhongdong Yin; Renzhong Shan; Weidong Shang

2009-10-01T23:59:59.000Z

147

Parameter Estimation and Compensation in Systems with Nonlinearly Parameterized Perturbations  

E-Print Network (OSTI)

. Underbalanced drilling dynamics: Two-phase flow modelling, experiments and numerical solutions techniques. In

Johansen, Tor Arne

148

Microcantilever heater-thermometer with integrated temperature-compensated strain sensor  

DOE Patents (OSTI)

The present invention provides microcantilever hotplate devices which incorporate temperature compensating strain sensors. The microcantilever hotplate devices of the present invention comprise microcantilevers having temperature compensating strain sensors and resistive heaters. The present invention also provides methods for using a microcantilever hotplate for temperature compensated surface stress measurements, chemical/biochemical sensing, measuring various properties of compounds adhered to the microcantilever hotplate surface, or for temperature compensated deflection measurements.

King, William P. (Champaign, IL); Lee, Jungchul (Champaign, IL); Goericke, Fabian T. (Wolfsburg, DE)

2011-04-19T23:59:59.000Z

149

Original article: Selective compensation of voltage harmonics in grid-connected microgrids  

Science Conference Proceedings (OSTI)

In this paper, a novel approach is proposed for selective compensation of main voltage harmonics in a grid-connected microgrid. The aim of compensation is to provide a high voltage quality at the point of common coupling (PCC). PCC voltage quality is ... Keywords: Distributed generator (DG), Grid-connected, Microgrid, Voltage harmonics compensation

Mehdi Savaghebi, Juan C. Vasquez, Alireza Jalilian, Josep M. Guerrero, Tzung-Lin Lee

2013-05-01T23:59:59.000Z

150

Systems and methods for compensating for electrical converter nonlinearities  

DOE Patents (OSTI)

Systems and methods are provided for delivering energy from an input interface to an output interface. An electrical system includes an input interface, an output interface, an energy conversion module coupled between the input interface and the output interface, and a control module. The control module determines a duty cycle control value for operating the energy conversion module to produce a desired voltage at the output interface. The control module determines an input power error at the input interface and adjusts the duty cycle control value in a manner that is influenced by the input power error, resulting in a compensated duty cycle control value. The control module operates switching elements of the energy conversion module to deliver energy to the output interface with a duty cycle that is influenced by the compensated duty cycle control value.

Perisic, Milun; Ransom, Ray M.; Kajouke, Lateef A.

2013-06-18T23:59:59.000Z

151

Temperature compensated current sensor using reference magnetic field  

DOE Patents (OSTI)

A method is described to provide temperature compensation and self-calibration of a current sensor based on a plurality of magnetic field sensors positioned around a current carrying conductor. A reference magnetic field generated within the current sensor housing is detected by a separate but identical magnetic field sensor and is used to correct variations in the output signal due to temperature variations and aging.

Yakymyshyn, Christopher Paul (Seminole, FL); Brubaker, Michael Allen (Loveland, CO); Yakymyshyn, Pamela Jane (Seminole, FL)

2007-10-09T23:59:59.000Z

152

Comparison of compensation paid scientists and engineers in research and development: DOE National Survey of Compensation, 1982 data  

Science Conference Proceedings (OSTI)

Under a contract with the US Department of Energy, the Columbus Laboratories of Battelle conducts an annual salary survey entitled A National Survey of Compensation Paid to Scientists and Engineers engaged in Research and Development Activities. The 1982 report contained the results of its 15th annual survey and included data for five types of R and D establishments (sectors): Industry, Nonprofit Research Institutes, Federally Funded R and D Centers (referred to as Contract Research Centers), Federal Government Laboratories, and Educational Institutions. This study covers 18 DOE contractor-operated laboratories, 7 of which are included in the Contract Research Center sector of Battelle's National Survey. Each DOE Laboratory agreed that computer tapes of its submission, reflecting Survey input, would be made available to DOE for this study. The purpose of this study is to compare compensation and other characteristics of the DOE Laboratories with National Survey patterns.

Not Available

1983-01-01T23:59:59.000Z

153

Comparison of compensation paid scientists and engineers in research and development: DOE national survey of compensation, 1981 data  

Science Conference Proceedings (OSTI)

Under a contract with the US Department of Energy, the Columbus Laboratories of Battelle conducts an annual salary survey entitled A National Survey of Compensation Paid to Scientists and Engineers Engaged in Research and Development Activities. The 1981 report contained the results of its 14th annual survey and included data for five types of R and D establishments (sectors): Industry, Nonprofit Research Institutes, Federally Funded R and D Centers (referred to as Contract Research Centers), Federal Government Laboratories, and Educational Institutions. This study covers 18 DOE contractor-operated laboratories, 7 of which are included in the Contract Research Center sector of Battelle's National Survey. Each DOE Laboratory agreed that computer tapes of its submission, reflecting Survey input, would be made available to DOE for this study. The purpose of this study is to compare compensation and other characteristics of the DOE Laboratories with National Survey patterns.

Not Available

1982-01-01T23:59:59.000Z

154

Parameter Estimation and Compensation in Systems with Nonlinearly Parameterized Perturbations  

E-Print Network (OSTI)

., Sævareid, O., Fjelde, K. K., 2000. Underbalanced drilling dynamics: Two-phase flow modelling, experiments

Johansen, Tor Arne

155

Direct 4D-Var Assimilation of NCEP Stage IV Radar and Gauge Precipitation Data at ECMWF  

Science Conference Proceedings (OSTI)

Direct four-dimensional variational data assimilation (4D-Var) of NCEP stage IV radar and gauge precipitation observations over the eastern United States has been developed and tested in ECMWF’s global Integrated Forecasting System. This is the ...

Philippe Lopez

2011-07-01T23:59:59.000Z

156

A Low Cost Immobilization Agent From an Invasive Marine Alga: Caulerpa racemosa var. cylindracea Biomass In Bovine Serum Albumin Immobilization  

E-Print Network (OSTI)

Objectives: Caulerpa racemosa var. cylindracea is a marine green alga which has been widely invading sublittoral ecosystem of the Mediterranean Sea since 1991. Inasmuch as there is no eradication method related to this species so far, use of the dried biomass of C.racemosa for immobilization of bovine serum albumin was studied in the present study. Materials and Methods: Caulerpa racemosa var. cylindracea was collected from Seferihisar – ?zmir by SCUBA diving. Immobilization studies were done by using batch technique under different conditions concerning the determination of optimum temperature, ionic strength, pH and adsorbent dosage. Results: Optimum pH, ionic strength, temperature and amount of adsorbent dosage was found as 7 (pH), 50 mM, 25 0 C and 10 mg, respectively. Conclusion: According to results of this paper, dried and powdered form of Caulerpa racemosa var. cylindracea might be used in some biomolecule immobilization studies as a low cost immobilization agent. This paper proposes an alternative application of biomass of Caulerpa racemosa var. cylindracea after a possible eradication method which will be carried out in future.

Serum Albuminine; Yönelik Dü?ük; Maliyetli Immobilizasyon Ajan?; Sevilay Cengiz; Levent Cavas; M. Kadir Yurdakoc; Levent Cavas

2008-01-01T23:59:59.000Z

157

Demand response compensation, net Benefits and cost allocation: comments  

Science Conference Proceedings (OSTI)

FERC's Supplemental Notice of Public Rulemaking addresses the question of proper compensation for demand response in organized wholesale electricity markets. Assuming that the Commission would proceed with the proposal ''to require tariff provisions allowing demand response resources to participate in wholesale energy markets by reducing consumption of electricity from expected levels in response to price signals, to pay those demand response resources, in all hours, the market price of energy for such reductions,'' the Commission posed questions about applying a net benefits test and rules for cost allocation. This article summarizes critical points and poses implications for the issues of net benefit tests and cost allocation. (author)

Hogan, William W.

2010-11-15T23:59:59.000Z

158

Sealed absorbed electrolyte battery with bulge compensating end cells  

Science Conference Proceedings (OSTI)

A sealed absorbed electrolyte battery is described comprising, in combination: a sealed container divided into working cells by internal partition walls; each working cell containing an electrode stack comprising positive and negative plates and substantially porous separators intimately contacting and separating the positive and negative plates; an electrolyte substantially completely absorbed in the plates and separators; the working cells being dimensioned to hold the plates and separators within the working cell in contact with each other; and bulge compensating auxiliary cells for accommodating gas pressure changes within the battery without substantially deforming the working cells.

Oswald, T.L.

1988-03-08T23:59:59.000Z

159

Exploring the International Linkages of the Euro Area: a Global VAR Analysis  

E-Print Network (OSTI)

, ..., N, and then stack to yield the VAR(p) model in xt: G (L,p)xt = ?t, (15) where G (L,p) = ? ???? A0(L, p)W0 A1(L, p)W1 ... AN(L, p)WN ? ???? , ?t = ? ???? ?0t ?1t ... ?Nt ? ???? . (16) 6For further details see PSW. 7Here we are assuming that dt... , the UK and the rest of Europe Country/Regiona Critical Values H0 H1 E.A. Japan U.K. Sweden Switz. Norway 95% 90% Maximum Eigenvalue Statistics r = 0 r = 1 77.82 199.44 97.68 78.23 97.35 110.91 63.52 60.13 r ? 1 r = 2 55.97 83.88 69.90 68.97 76.39 65.11 57...

Dees, S; Mauro, Filippo di; Pesaran, M Hashem; Smith, L Vanessa

2006-03-14T23:59:59.000Z

160

Physics and Dynamics of Density-Compensated Temperature and Salinity Anomalies. Part I: Theory  

Science Conference Proceedings (OSTI)

Subducted temperature anomalies have been invoked as a possible way for midlatitudes to alter the climate variability of equatorial regions through the so-called thermocline bridge, both in the Pacific and Atlantic Oceans. To have a significant ...

Rémi Tailleux; Alban Lazar; C. J. C. Reason

2005-05-01T23:59:59.000Z

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


161

Public Comment re NOI on Convention on Supplementary Compensation for Nuclear Damage  

Energy.gov (U.S. Department of Energy (DOE))

ENERGYSOLUTIONS' Comment in Response to Notice of Inquiry, Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation -75 FR 43945

162

Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation, Section 934  

Energy.gov (U.S. Department of Energy (DOE))

LES comments in response to Notice of Inquiry on Convention on Supplementary Compensation for Nuclear Damage Contingent Cost Allocation, Section 934

163

Comparison of Compensation paid scientists and engineers in research and development. DOE National Survey of Compensation, 1980 data  

Science Conference Proceedings (OSTI)

Several compensation characteristics of DOE contractor-operated laboratories are compared with those reported in the 1980 National Survey of Compensation Paid Scientists and Engineers Engaged in Research and Development Activities. The data are as of August 1, 1980. A total of 339 establishments (industry, Federal laboratories, Federal contract research centers, nonprofit research institutes, educational institutions) and 18 DOE laboratories are included in the survey. Characteristics of DOE laboratories such as salaries by field of degree, maturity, and management levels are shown and are compared with the National Survey patterns. Approximately 8 out of 10 S and E's at DOE Laboratories (84.8%) held a degree in one of four fields: engineering, chemistry, physics, or mathematics/statistics. In the National Survey, 78.5% of all S and E's held degrees in these fields. The average DOE Laboratory S and E salary increased 6.6% between 1979 and 1980, while the average salary in the National Survey advanced by 7.5%. The National Survey percentage increase over the year was greater at each degree level than among DOE Laboratories.

Not Available

1981-01-01T23:59:59.000Z

164

Steady-state power flow modeling for a dynamic voltage restorer  

Science Conference Proceedings (OSTI)

This paper presents analysis, modeling and simulation of power distribution network performance incorporating with an installed dynamic voltage restorer (DVR). DVR is one of series compensators used in power distribution systems in order to maintain ... Keywords: Gauss-Seidel method, dynamic voltage restorer, modeling, power flow, simulation

T. Ratniyomchai; T. Kulworawanichpong

2006-03-01T23:59:59.000Z

165

Indirect Assimilation of Radar Reflectivity with WRF 3D-Var and Its Impact on Prediction of Four Summertime Convective Events  

Science Conference Proceedings (OSTI)

An indirect radar reflectivity assimilation scheme has been developed within the Weather Research and Forecasting model three-dimensional data assimilation system (WRF 3D-Var). This scheme, instead of assimilating radar reflectivity directly, ...

Hongli Wang; Juanzhen Sun; Shuiyong Fan; Xiang-Yu Huang

2013-04-01T23:59:59.000Z

166

Performance of 4D-Var with Different Strategies for the Use of Adjoint Physics with the FSU Global Spectral Model  

Science Conference Proceedings (OSTI)

A set of four-dimensional variational data assimilation (4D-Var) experiments were conducted using both a standard method and an incremental method in an identical twin framework. The full physics adjoint model of the Florida State University ...

Zhijin Li; I. M. Navon; Yanqiu Zhu

2000-03-01T23:59:59.000Z

167

Body radiation exposure in breast cancer radiotherapy: Impact of breast IMRT and virtual wedge compensation techniques  

Science Conference Proceedings (OSTI)

Purpose: Recent reports demonstrate a dramatically increased rate of secondary leukemia for breast cancer patients receiving adjuvant high-dose anthracycline and radiotherapy, and that radiation is an independent factor for the development of leukemia. This study aimed to evaluate the radiation body exposure during breast radiotherapy and to characterize the factors associated with an increased exposure. Patients and Methods: In a prospective cohort of 120 women, radiation measurements were taken from four sites on the body at the time of adjuvant breast radiotherapy. Multiple regression analysis was performed to analyze patient and treatment factors associated with the amount of scattered radiation. Results: For standard 50 Gy breast radiotherapy, the minimal dose received by abdominal organs is on average 0.45 Gy, ranging from 0.06 to 1.55 Gy. The use of physical wedges as a compensation technique was the most significant factor associated with increased scattered dose (p < 0.001), resulting in approximately three times more exposure compared with breast intensity-modulated radiation therapy (IMRT) and dynamic wedge. Conclusions: The amount of radiation that is scattered to a patient's body is consistent with exposure reported to be associated with excess of leukemia. In accordance with the As Low As Reasonably Achievable (ALARA) principle, we recommend using breast IMRT or virtual wedging for the radiotherapy of breast cancer receiving high-dose anthracycline chemotherapy.

Woo, Tony [Department of Radiation Oncology, Sunnybrook and Women's College Health Sciences Centre, Toronto, Ontario (Canada); Pignol, Jean-Philippe [Department of Radiation Oncology, Sunnybrook and Women's College Health Sciences Centre, Toronto, Ontario (Canada)]. E-mail: Jean-Philippe.Pignol@sw.ca; Rakovitch, Eileen [Department of Radiation Oncology, Sunnybrook and Women's College Health Sciences Centre, Toronto, Ontario (Canada); Vu, Toni [Department of Radiation Oncology, Sunnybrook and Women's College Health Sciences Centre, Toronto, Ontario (Canada); Hicks, Deanna [Department of Radiation Oncology, Sunnybrook and Women's College Health Sciences Centre, Toronto, Ontario (Canada); O'Brien, Peter [Department of Medical Physics, Sunnybrook and Women's College Health Sciences Centre, Toronto, Ontario (Canada); Pritchard, Kathleen [Department of Medical Oncology, Sunnybrook and Women's College Health Sciences Centre, Toronto, Ontario (Canada)

2006-05-01T23:59:59.000Z

168

Compensational scintillation detector with a flat energy response for flash X-ray measurements  

SciTech Connect

To measure the intensity of flash X-ray sources directly, a novel scintillation detector with a fast time response and flat energy response is developed by combining film scintillators of doped ZnO crystal and fast organic scintillator together. Through compensation design, the dual-scintillator detector (DSD) achieved a flat energy response to X-rays from tens of keV to several MeV, and sub-nanosecond time response by coupling to ultrafast photo-electronic devices. A prototype detector was fabricated according to the theoretical design; it employed ZnO:In and EJ228 with thicknesses of 0.3 mm and 0.1 mm, respectively. The energy response of this detector was tested on monoenergetic X-ray and {gamma}-ray sources. The detector performs very well with a sensitivity fluctuation below 5% for 8 discrete energy points within the 40-250 keV energy region and for other energies of 662 keV and 1.25 MeV as well, showing good accordance with the theoretical design. Additionally, the detector works properly for the application to the flash X-ray radiation field absolute intensity measurement. This DSD may be very useful for the diagnosis of time-resolved dynamic physical processes of flash X-ray sources without knowing the exact energy spectrum.

Chen Liang; Quan Lin; Zhang Zhongbing [Radiation Detection Research Center, Northwest Institute of Nuclear Technology, P.O. Box 69-9, Xi'an, Shaanxi 710024 (China); Ouyang Xiaoping [Radiation Detection Research Center, Northwest Institute of Nuclear Technology, P.O. Box 69-9, Xi'an, Shaanxi 710024 (China); School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206 (China); Department of Engineering Physics, Tsinghua University, Beijing 100084 (China); Liu Bin [School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206 (China); Liu Jinliang [Radiation Detection Research Center, Northwest Institute of Nuclear Technology, P.O. Box 69-9, Xi'an, Shaanxi 710024 (China); Department of Engineering Physics, Tsinghua University, Beijing 100084 (China)

2013-01-15T23:59:59.000Z

169

Distributed control for optimal reactive power compensation in smart microgrids  

E-Print Network (OSTI)

We consider the problem of optimal reactive power compensation for the minimization of power distribution losses in a smart microgrid. We first propose an approximate model for the power distribution network, which allows us to cast the problem into the class of convex quadratic, linearly constrained, optimization problems. We also show how this model provides the tools for a distributed approach, in which agents have a partial knowledge of the problem parameters and state, and can only perform local measurements. Then, we design a randomized, gossip-like optimization algorithm, providing conditions for convergence together with an analytic characterization of the convergence speed. The analysis shows that the best performance can be achieved when we command cooperation among agents that are neighbors in the smart microgrid topology. Numerical simulations are included to validate the proposed model and to confirm the analytic results about the performance of the proposed algorithm.

Bolognani, Saverio

2011-01-01T23:59:59.000Z

170

System for throttling and compensation for variable feedstock properties  

DOE Patents (OSTI)

Apparatus is shown for adjusting the feed rate of pulverized feed material into a pressurized container. The apparatus also has utility for compensating for variations in the permeability of the feed material. A rotor that includes sprues with provision for controlling the pressure distribution along the sprues is located within the pressurized container. The rotor hub is connected to a drive means and a material supply means which extend through the wall of the container. A line for controlling pressure along the sprues by gas injection is connected to a chamber between sections of the sprue for controlling gas pressure at that point. The gas pressure control line is connected to a pressurized gas source and a control system external to the rotor.

Meyer, John W. (Palo Alto, CA)

1981-01-01T23:59:59.000Z

171

Electric vehicle drive train with rollback detection and compensation  

DOE Patents (OSTI)

An electric vehicle drive train includes a controller for detecting and compensating for vehicle rollback, as when the vehicle is started upward on an incline. The vehicle includes an electric motor rotatable in opposite directions corresponding to opposite directions of vehicle movement. A gear selector permits the driver to select an intended or desired direction of vehicle movement. If a speed and rotational sensor associated with the motor indicates vehicle movement opposite to the intended direction of vehicle movement, the motor is driven to a torque output magnitude as a nonconstant function of the rollback speed to counteract the vehicle rollback. The torque function may be either a linear function of speed or a function of the speed squared.

Konrad, Charles E. (Roanoke, VA)

1994-01-01T23:59:59.000Z

172

Electric vehicle drive train with rollback detection and compensation  

DOE Patents (OSTI)

An electric vehicle drive train includes a controller for detecting and compensating for vehicle rollback, as when the vehicle is started upward on an incline. The vehicle includes an electric motor rotatable in opposite directions corresponding to opposite directions of vehicle movement. A gear selector permits the driver to select an intended or desired direction of vehicle movement. If a speed and rotational sensor associated with the motor indicates vehicle movement opposite to the intended direction of vehicle movement, the motor is driven to a torque output magnitude as a nonconstant function of the rollback speed to counteract the vehicle rollback. The torque function may be either a linear function of speed or a function of the speed squared. 6 figures.

Konrad, C.E.

1994-12-27T23:59:59.000Z

173

Dead-time compensation for a logarithmic display rate meter  

DOE Patents (OSTI)

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

Larson, John A. (Aurora, IL); Krueger, Frederick P. (Aurora, IL)

1988-09-20T23:59:59.000Z

174

Apparatus and method to compensate for refraction of radiation  

DOE Patents (OSTI)

An apparatus to compensate for refraction of radiation passing through a curved wall of an article is provided. The apparatus of a preferred embodiment is particularly advantageous for use in arc tube discharge diagnostics. The apparatus of the preferred embodiment includes means for pre-refracting radiation on a predetermined path by an amount equal and inverse to refraction which occurs when radiation passes through a first wall of the arc tube such that, when the radiation passes through the first wall of the arc tube and into the cavity thereof, the radiation passes through the cavity approximately on the predetermined path; means for releasably holding the article such that the radiation passes through the cavity thereof; and means for post-refracting radiation emerging from a point of the arc tube opposite its point of entry by an amount equal and inverse to refraction which occurs when radiation emerges from the arc tube. In one embodiment the means for pre-refracting radiation includes a first half tube comprising a longitudinally bisected tube obtained from a tube which is approximately identical to the arc tube's cylindrical portion and a first cylindrical lens, the first half tube being mounted with its concave side facing the radiation source and the first cylindrical lens being mounted between the first half tube and the arc tube and the means for post-refracting radiation includes a second half tube comprising a longitudinally bisected tube obtained from a tube which is approximately identical to the arc tube's cylindrical portion and a second cylindrical lens, the second half tube being mounted with its convex side facing the radiation source and the second cylindrical lens being mounted between the arc tube and the second half tube. Methods to compensate for refraction of radiation passing into and out of an arc tube is also provided.

Allen, Gary R. (Georgetown, MA); Moskowitz, Philip E. (Peabody, MA)

1990-01-01T23:59:59.000Z

175

A Case Study on Testing and Certification of Equipment for a Volt-VAR Control Application at Hydro-Québec  

Science Conference Proceedings (OSTI)

This case study shares the practical experience gained in the certifi­cation and testing of the various distribution devices that are part of Hydro-Québec’s voltage-var control project. The certifica­tion process at Hydro-Québec is specifically addressed, which included testing and validation at the Hydro-Québec Research Institute (the Institut de recherche d’Hydro-Québec, or IREQ), field measurements from a pilot project, and experience related to ...

2013-06-10T23:59:59.000Z

176

Voltage Stability and Power Quality Issues of Wind Farm with Series Compensation  

E-Print Network (OSTI)

generator (DFIG) wind farms with series and shunt compensation are analyzed. The voltage source converter of a static synchronous compensator (STATCOM), the converter side of a DFIG and a load are considered-speed wind turbine (FSWT) and doubly-fed induction generator (DFIG) based wind farms. The expected number

Pota, Himanshu Roy

177

The excitation control system of the ASK-100-4 asynchronous compensator  

Science Conference Proceedings (OSTI)

The excitation regulation system of the ASK-100-4 asynchronous compensator is described. The main modes of operation of the compensators in the Beskudnikovo substation of the 'Mosenergo' JSC are considered. The results of an investigation of an actual sample of an AER-ASC automatic excitation regulator on a computer bench, operating in real time, are presented.

Dovganyuk, I. Ya.; Labunets, I. A.; Plotnikova, T. V.; Sokur, P. V., E-mail: sokur@vniie.ru; Shakaryan, Yu. G. [JSC 'R and D Centre for Power Engineering' (Russian Federation)

2010-12-15T23:59:59.000Z

178

Dead-Time Compensation for PMSM Drive Based on Neuro-Fuzzy Observer  

Science Conference Proceedings (OSTI)

To compensate voltage difference between the reference and the actual output voltages caused by dead-time effects, a novel compensation method for permanent magnet synchronous motor (PMSM) drive based on neuro-fuzzy observer is proposed. This method ... Keywords: dead-time, PMSM, ANN, FC

Xianqing Cao; Liping Fan

2008-10-01T23:59:59.000Z

179

Optimal Planning of Reactive Power Compensators for Oil Field Distribution Networks  

Science Conference Proceedings (OSTI)

The characteristic behavior of the loads of oil pumps is analyzed. An approach for low-voltage side reactive power compensators of oil field distribution networks is put forward. Based on the supplied loads of transformers, the index of maximum reduction ... Keywords: Genetic Algorithm, distribution network, oil field, reactive power compensation

Wu Xiaomeng; Yan Suli

2009-05-01T23:59:59.000Z

180

Calculation of the electron structure of vacancies and their compensated states in III-VI semiconductors  

Science Conference Proceedings (OSTI)

The Green's functions theory and the bond-orbital model are used as a basis for calculations of the electron structure of local defects-specifically, vacancies and their compensated states in III-VI semiconductors. The energy levels in the band gap are established, and the changes induced in the electron densities in the GaS, GaSe, and InSe semiconductors by anion and cation vacancies and their compensated states are calculated. It is established that, if a vacancy is compensated by an atom of an element from the same subgroup with the same tetrahedral coordination and if the ionic radius of the compensating atom is smaller than that of the substituted atom, the local levels formed by the vacancy completely disappear. It is shown that this mechanism of compensation of vacancies provides a means not only for recovering the parameters of the crystal, but for improving the characteristics of the crystal as well.

Mehrabova, M. A., E-mail: Mehrabova@mail.ru; Madatov, R. S. [Azerbaijan National Academy of Sciences, Institute of Radiation Problems (Azerbaijan)

2011-08-15T23:59:59.000Z

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


181

COMPENSATION OF FAST KICKER ROLLS WITH SKEW QUADRUPOLES  

Science Conference Proceedings (OSTI)

The development of the third generation light sources lead to the implementation of the top-up operation, when injection occurs while users collect data. The beam excursions due to the non-closure of the injection bump can spoil the data and need to be suppressed. In the horizontal plane compensation can be achieved by adjusting timing and kick amplitudes. The rolls of the kicker magnets create non-closure in the vertical plane and usually there is no means for correction. In the paper we describe proposed compensation scheme utilizing two skew quadrupoles placed inside the injection bump. The third generation light sources implement top-up operation firstly introduced at Advanced Photon Source. In this mode the circulating beam current is supported near constant by frequent injection of small charge, while photon beam is delivered for users. The beam perturbations caused by the mismatched injection bump can provide undesired noise in the user data. Usually the injection trigger is distributed to the users end stations so that those affected would be able to blank data acquisition. Nevertheless, as good operational practice such transients should be suppressed as much as possible. In the horizontal plane (which is commonly used for injection) one can adjust individual kicker strength as well as trigger delay while observing motion of the stored beam centroid. In the vertical plane such means are unavailable in the most cases. The possible solutions include dedicated weak vertical kickers and motorized adjustment of the roll angle of the injection kickers. Both abovementioned approaches are expensive and can significantly deteriorate reliability. We suggest two employ two skew quadrupoles (to correct both angle and position) placed inside the injection bump. In this case the beam position itself serves as measure of the kicker strength (assuming that kickers are well matched) and vertical kicks from the skew quadrupoles will be self synchronized with injection bump. In this paper we will consider the case when injection hardware (kickers and septa) are located in the same straight. Such an approach simplifies consideration but it can be generalized.

Pinayev, I.

2011-03-28T23:59:59.000Z

182

Wear compensating seal means for rotary piston coal feeder  

SciTech Connect

The present invention is directed to a wear compensating seal arrangement for use in a rotary piston feeder utilized for feeding pulverized coal into a gasifier operating at relatively high pressures and elevated temperatures. The rotary piston feeder has a circular casing with a coal loading opening therein diametrically opposed from a coal discharge and contains a rotatable disoidal rotor having a cylinder in which a reciprocatable piston is disposed. The reciprocation of the piston within the cylinder is provided by a stationary conjugate cam whereby pulverized coal from a coal hopper at atmospheric pressure can be introduced into the cylinder and then discharged therefrom into the high pressure gasifier while maintaining minimal losses of producer gas and the expenditure of minimal energy which would detract from the efficiency of the gasification. The seal arrangement of the present invention is disposed between the rotor and the casing about the coal discharge and prevents the high pressure gases from within the gasifier from escaping between these relatively movable parts during operation of the coal feeder. The seal utilizes a primary seal in contact with the rotor and a secondary seal supporting the primary seal. The primary seal is continuously urged towards the rotor by springs and the high pressure producer gas.

Gencsoy, Hasan T. (Morgantown, WV); Gardner, John F. (Morgantown, WV)

1979-01-01T23:59:59.000Z

183

A compensated vibrating optical fiber pressure measuring device  

DOE Patents (OSTI)

A microbending optical fiber is attached under tension to a diaphragm to sense a differential pressure applied across the diaphragm which causes it to deflect. The fiber is attached to the diaphragm so that one portion of the fiber, attached to a central portion of the diaphragm, undergoes a change in tension; proportional to the differential pressure applied to the diaphragm while a second portion attached at the periphery of the diaphragm remains at a reference tension. Both portions of the fiber are caused to vibrate at their natural frequencies. Light transmitted through the fiber is attenuated by both portions of the tensioned sections of the fiber by an amount which increases with the curvature of fiber bending so that the light signal is modulated by both portions of the fiber at separate frequencies. The modulated light signal is transduced into an electrical signal. The separate modulation signals are detected to generate separate signals having frequencies corresponding to the reference and measuring vibrating sections of the continuous fiber, respectively. A signal proportional to the difference between these signals is generated which is indicative of the measured pressure differential across the diaphragm. The reference portion of the fiber is used to compensate the pressure signal for zero and span changes resulting from ambient temperature and humidity effects upon the fiber and the transducer fixture.

Fasching, G.E.; Goff, D.R.

1985-12-30T23:59:59.000Z

184

Revisiting plasma hysteresis with an electronically compensated Langmuir probe  

Science Conference Proceedings (OSTI)

The measurement of electron temperature in plasma by Langmuir probes, using ramped bias voltage, is seriously affected by the capacitive current of capacitance of the cable between the probe tip and data acquisition system. In earlier works a dummy cable was used to balance the capacitive currents. Under these conditions, the measured capacitive current was kept less than a few mA. Such probes are suitable for measurements in plasma where measured ion saturation current is of the order of hundreds of mA. This paper reports that controlled balancing of capacitive current can be minimized to less than 20 {mu}A, allowing plasma measurements to be done with ion saturation current of the order of hundreds of {mu}A. The electron temperature measurement made by using probe compensation technique becomes independent of sweep frequency. A correction of {<=}45% is observed in measured electron temperature values when compared with uncompensated probe. This also enhances accuracy in the measurement of fluctuation in electron temperature as {delta}T{sub pk-pk} changes by {approx}30%. The developed technique with swept rate {<=}100 kHz is found accurate enough to measure both the electron temperature and its fluctuating counterpart. This shows its usefulness in measuring accurately the temperature fluctuations because of electron temperature gradient in large volume plasma device plasma with frequency ordering {<=}50 kHz.

Srivastava, P. K.; Singh, S. K.; Awasthi, L. M.; Mattoo, S. K. [Institute for Plasma Research, Gandhinagar 382 428 (India)

2012-09-15T23:59:59.000Z

185

Attached is Policy Flash 2013-34 Department of Energy Acquisition Letter 2013-04 on Executive Compensation  

Energy.gov (U.S. Department of Energy (DOE))

Attached is Policy Flash 2013-34 Department of Energy Acquisition Letter 2013-04 on Executive Compensation           

186

On-line reactive power compensation schemes for unbalanced three phase four wire distribution feeders  

Science Conference Proceedings (OSTI)

A new reactive power compensation method is developed to reduce the negative and zero sequence components of load currents and to improve the load bus power factor of unbalanced three-phase four-wire distribution feeders. Negative and zero sequences currents may cause additional losses and damages to power systems. Load compensation at the load bus is an effective method to eliminate those undesired sequence currents. The compensation technique uses a Y-connected and a [Delta]-connected static reactive power compensators to give a different amount of reactive power compensation to each phase. The compensation formulas are very suitable for on-line control by measuring phase voltages and currents in the real time. The compensation effect can also be achieved even if one leg of the SVCs is out of service. In addition to balancing effect and power factor improvement at the load bus, the SVCs can also be used to support the load bus voltage and to maintain the substation feeder at unity powder factor. Digital simulations are made with the load data measured from an 11.4kV secondary substation feeder.

Sanyi Lee; Chijui Wu (National Taiwan Inst. of Tech., Taipei (Taiwan, Province of China). Dept. of Electrical Engineering)

1993-10-01T23:59:59.000Z

187

Self-compensation in highly n-type InN  

Science Conference Proceedings (OSTI)

Acceptor-type defects in highly n-type InN are probed using positron annihilation spectroscopy. Results are compared to Hall effect measurements and calculated electron mobilities. Based on this, self-compensation in n-type InN is studied, and the microscopic origin of compensating and scattering centers in irradiated and Si-doped InN is discussed. We find significant compensation through negatively charged indium vacancy complexes as well as additional acceptor-type defects with no or small effective open volume, which act as scattering centers in highly n-type InN samples.

Rauch, C.; Tuomisto, F. [Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076 Aalto, Espoo (Finland); King, P. D. C. [School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS (United Kingdom); Veal, T. D. [Stephenson Institute for Renewable Energy and Department of Physics, University of Liverpool, Liverpool L69 4ZF (United Kingdom); Lu, H.; Schaff, W. J. [Department of Electrical and Computer Engineering, Cornell University, 425 Philips Hall, Ithaca, New York 14853 (United States)

2012-07-02T23:59:59.000Z

188

Identification and compensation of friction for a dual stage positioning system  

E-Print Network (OSTI)

Motion control systems are usually designed to track trajectories and/or regulate about a desired point. Most of the other objectives, like minimizing the tracking time or minimizing the energy expended, are secondary which quantify the above described objectives. The control problem in hard disk drives is tracking and seeking the desired tracks. Recent increase in the storage capacity demands higher accuracy of the read/write head. Dual stage actuators as compared to conventional single actuator increases the accuracy of the read/write head in hard disk drives. A scaled up version of the dual stage actuator is considered as the test bed for this thesis. Friction is present in all electromechanical systems. This thesis deals with modelling of the dual stage actuator test bed. A linear model predicts the behavior of the ?ne stage. Friction is signi?cant in the coarse stage. Considerable time has been spent to model the coarse stage as a friction based model. Initially, static friction models were considered to model the friction. Dynamic models, which describe friction better when crossing zero velocity were considered. By analyzing several experimental data it was concluded that the friction was dependent on position and velocity as compared to conventional friction models which are dependent on the direction of motion. Static and Coulomb friction were modelled as functions of velocity and position. This model was able to predict the behavior of the coarse stage satisfactorily for various initial conditions. A friction compensation scheme based on the modelled friction is used to linearize the system based on feedback linearization techniques.

Thimmalapura, Satish Voddina

2004-08-01T23:59:59.000Z

189

Compensation for L212GLU in bacterial reaction centers  

SciTech Connect

In wild-type bacterial reaction centers (RC), residue L212Glu, which is located about 5 {Angstrom} away from Q{sub B}, is involved in the delivery of the second proton to Q{sub B{sup 2}{minus}} [1-4]. We previously constructed the L212Glu-L213Asp {yields} Ala-Ala double mutant of Rhodobacter capsulatus, and it is incapable of photosynthetic growth (PS{sup {minus}}) due to interruption of the proton transfer pathway to Q{sub B}[3,4]. We have isolated several photocompetent (PS{sup +}) phenotypic revertants of this L212-L213AA double mutant [3-7]. The compensatory mutations that restore function in these strains are diverse and show that neither L212Glu nor L213Asp is absolutely required for efficient light-induced electron or proton transfer. Genotypic revertant and second-site mutations, located within the Q{sub B} binding picket or at more distant sites, can compensate for mutations at L212 and L213 to restore photocompetence. One of the phenotypic revertants of the L212Ala-L213Ala double mutant carries a genotypic reversion of L213Ala to Asp; the Ala substitution at L212 remains. We were intrigued that this L212Glu {yields} Ala mutant R. capsulatus is photocompetent, while the L212Glu {yields} Gln mutant of R. sphaeroides is not, particularly since the sequence identity in the Q{sub B} site of these two strains is 90{percent} [8]. To this end, we constructed the L212Glu {yields} Gln mutant in R. capsulatus, and it is also PS{sup {minus}}. To determine the function that is lost in the L212Gln mutant but restored by Ala at that site, we selected four PS{sup +} revertants from the L212Gln strain.

Hanson, D.K.; Deng, Y.L.; Schiffer, M. [Argonne National Lab., IL (United States); Sebban, P. [Centre de Genetique Moleculaire, Gif/Yvette (France). CNRS

1995-12-31T23:59:59.000Z

190

Compensating for temperature variations in time-lapse electrical resistivity difference imaging  

E-Print Network (OSTI)

-compensated data, inversions have been car- ried out on two synthetic data sets and a field example. Differ- encing corrections to be ap- plied to time-lapse difference inversion schemes and hydro- geophysical inversion where

191

Managerial myopia, CEO compensation structure and earnigns management by R&D cuts.  

E-Print Network (OSTI)

??Prior studies show that linking executive compensation to current accounting performance provides incentive for CEOs to manage earnings by cutting R&D expenditure (e.g. Baber et… (more)

He, Weidong (???)

2004-01-01T23:59:59.000Z

192

Compensation between resolved and unresolved wave driving in the Stratosphere: Implications for downward control  

Science Conference Proceedings (OSTI)

Perturbations to the orographic gravity wave parameterization scheme in an idealized general circulation model reveal a remarkable degree of compensation between the parameterized and the resolved wave driving: when the orographic gravity wave ...

Naftali Y. Cohen; Edwin P. Gerber; Oliver Bühler

193

Public comment re Convention on Supplementary Compensation on Nuclear Damage Contingent Cost Allocation  

Energy.gov (U.S. Department of Energy (DOE))

Comments by the Nuclear Energy Institute (NEI) on Convention on Supplementary Compensation on Nuclear Damage Contingent Cost Allocation; Section 934 of the Energy Independence and Security Act of 2007

194

Commonwealth of Virginia 457 Deferred Compensation Plan Payroll Authorization Form --Instructions for State Agencies  

E-Print Network (OSTI)

for State Agencies Without Online Functionality Action Requested: Check the box that describes the action Compensation Plan Payroll Authorization Form -- State Agencies Without Online Functionality Currently, three State agencies (George Mason University, Virginia Commonwealth University and the University of Virginia

Brodie III, Edmund D.

195

Dynamic interactions between electricity prices and the regional economy  

E-Print Network (OSTI)

In this thesis we study characterize the dynamic relationships among two electricity price variables (residential and commercial) and six regional economic variables in order to examine each individual variable??s role in regional economic activity. We also answer the question ??Do electricity prices have impact on regional economic variables??? We use two statistical techniques as engines of analysis. First, we use directed acyclic graphs to discover how surprises (innovations) in prices from each variable are communicated to other variables in contemporaneous time. Second, we use time series methods to capture regularities in time lags among the series. Yearly time series data on two electricity prices and six regional economic variables for Montgomery County (Texas) are studied using time series methods. Directed Acyclic Graphs (DAGs) are used to impose restrictions on the Vector Auto Regression model (VAR). Using Innovation Accounting Analysis of the estimated Vector Auto Regression (VAR) model we unravel the dynamic relationships between the eight variables. We conclude that rising electricity prices have a negative impact on allregional economic variables. The commercial average electricity prices lead residential average electricity prices in the time frame we studied (1969-2000). Rising residential electricity prices also have a positive impact on income derived from transfer payments.

Bethapudi, Daniel Naveen

2003-05-01T23:59:59.000Z

196

1981 national survey of compensation paid scientists and engineers engaged in research and development activities  

Science Conference Proceedings (OSTI)

The results of a compensation survey conducted by the Columbus Laboratories of Battelle are presented. The survey was entitled A National Survey of Compensation Paid to Scientists and Engineers Engaged in Research and Development Activities. Information is included on the: sampling procedures; basic data for survey analysis; beginning salaries for recent graduates with bachelor, master, or doctorate degrees; salary trends; geographic analysis; interpretation of results; and salary tables. (LCL)

Not Available

1981-12-01T23:59:59.000Z

197

Technology Assessment and Application Guide for a Capacitor-Based Voltage Sag Compensator  

Science Conference Proceedings (OSTI)

Voltage sags and momentary interruptions result in a significant amount of process shutdowns for industrial customers. Voltage sag compensation devices help mitigate sags for susceptible devices and components, allowing for more reliable and robust process performance. This report provides a technology assessment and application guide for Marathon Power's Voltage Sag Compensator, a 120-V, 750-VA unit designed to provide AC backup power to sensitive electronic loads.

2009-12-22T23:59:59.000Z

198

Crosstalk Compensation for a Rapid, Higher Resolution Impedance Spectrum Measurement  

DOE Green Energy (OSTI)

Batteries and other energy storage devices are playing larger roles in various industries (e.g., military, automotive, electric utilities, etc.) as the U.S. seeks to reduce its dependence on foreign energy resources. As such, there exists a significant need for accurate, robust state-of-health assessment techniques. Present techniques tend to focus on simple, passive monitoring of voltage and current at a given ambient temperature. However, this approach has the disadvantage of ignoring key elements of health, that is, changes in resistance growth and power fade. Impedance spectroscopy is considered a useful laboratory tool in gauging changes in the resistance and power performance, but it has not been widely considered as an onboard diagnostic tool due to the length of time required to complete the measurement. Cross-Talk Compensation (CTC) is a novel approach that enables rapid, high resolution impedance spectra measurements using a hardware platform that could be designed as an embedded system. This input signal consists of a sum-of-sines excitation current that has a known frequency spread and a duration of one period of the lowest frequency. The voltage response is then captured at a sufficiently fast sample rate. Previously developed rapid impedance spectrum measurement techniques either required a longer excitation signal or a sum-of-sines signal that was separated by harmonic frequencies to reduce or eliminate, respectively, the cross-talk interference in the calculated results. The distinct advantage of CTC, however, is that non-harmonic frequencies can now be included within the excitation signal while still keeping the signal duration at one period of the lowest frequency. Since the frequency spread of the input signal is known, the crosstalk interference between sinusoidal signals within the sum-of-sines at a given frequency of interest can be pre-determined and assigned to an error matrix. Consequently, the real and imaginary components of the impedance at each frequency of interest can be calculated using simple linear algebra based on the error matrix and measured response from the energy storage device given the excitation signal. Analytical validation of CTC over a frequency range between 2000 and 0.1 Hz (i.e., a ten-second input signal duration) was performed using a standardized battery lumped parameter model. The results indicated that the CTC was able to successfully resolve more than 45 frequencies within a sum-of-sines excitation signal, whereas previous techniques could only resolve up to 15 frequencies. A simplified derivation of the CTC technique and its corresponding analytical validation studies using the lumped-parameter model will be presented.

Jon P. Christophersen; John L. Morrison; David M. Rose; William H. Morrison; Chester G. Motloch

2012-03-01T23:59:59.000Z

199

Graphene Antennas: Can Integration and Reconfigurability Compensate for the Loss?  

E-Print Network (OSTI)

In this opening presentation we will first recall the main characteristics of graphene conductivity and electromagnetic wave propagation on graphene-based structures. Based on these observations and different graphene antenna simulations from microwave to Terahertz, we will discuss the issue of antenna efficiency, integration and reconfigurability, as function of the operation frequency range. While the applicability of graphene for antennas at microwave appears limited to particular cases where very low efficiency can be tolerated for integration or transparency purpose, the plasmonic nature of graphene conductivity at terahertz frequency allows unprecedented antenna properties and in particular efficient dynamic reconfiguration.

Perruisseau-Carrier, Julien; Gomez-Diaz, Juan Sebastian; Carrasco, Eduardo

2013-01-01T23:59:59.000Z

200

Dislocation Dynamics  

Science Conference Proceedings (OSTI)

Mar 7, 2013 ... Recent Progress in Dislocation Dynamics: Sylvie Aubry1; Athanasios Arsenlis1; Wei Cai2; Steve Fitzgerald3; 1LLNL; 2Stanford University; ...

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


201

Influence of the presence of pre-existing thermal [var epsilon]-martensite on the formation of stress-induced [var epsilon]-martensite and on the shape memory effect of a Fe-Mn-Cr-Si-Ni shape memory alloy  

SciTech Connect

At present, many investigations are done on Fe-Mn-based shape memory alloys because of their particularly good one-way type shape memory effect and their low cost. With addition of Cr and Ni, it is possible to reach a good corrosion resistance, which confers to this type of alloys a commercial significance. The shape memory effect is associated with the formation of stress-induced [var epsilon]-martensite by deformation of an austenitic ([gamma]) sample. The reversion by heating of the [var epsilon]-martensite provides the shape memory effect. It is generally admitted that the presence of thermal [var epsilon]-martensite before deformation has a negative influence on the formation of the stress-induced martensite and on the shape memory effect. The authors' purpose is to evaluate the real influence of the pre-existing thermal [var epsilon]-martensite on the formation of the stress-induced [var epsilon]-martensite, its recovery and on the shape memory effect.

Federzoni, L.; Guenin, G. (G.E.M.P.P.M., Villeurbanne (France))

1994-07-01T23:59:59.000Z

202

Development of the Platform-Mounted Dynamic Voltage Restorer (PMDVR)  

Science Conference Proceedings (OSTI)

The uninterrupted supply of electrical power is critical for many commercial utility customers with sensitive loads. A voltage sag of a few cycles could cause loss of many thousands of dollars due to lost production from process stoppage and associated clean-up issues. The Platform Mounted Dynamic Voltage Restorer (PMDVR) is a distribution voltage level device that compensates for changes in supply line voltage to maintain acceptable input power to customers.

1998-12-31T23:59:59.000Z

203

Two dynamical core formulation flaws exposed by a baroclinic instability test case  

E-Print Network (OSTI)

or climate simulations if physical parameterizations or model components, like the ocean or ice, compensate General Circulation Model (GCM) in isolation from the physical parameterization package is an essential stepping stone during the model devel- opment and evaluation phase. The dynamical core tests have

Jablonowski, Christiane

204

On the application of computational fluid dynamics codes for liquefied natural gas dispersion.  

SciTech Connect

Computational fluid dynamics (CFD) codes are increasingly being used in the liquefied natural gas (LNG) industry to predict natural gas dispersion distances. This paper addresses several issues regarding the use of CFD for LNG dispersion such as specification of the domain, grid, boundary and initial conditions. A description of the k-{var_epsilon} model is presented, along with modifications required for atmospheric flows. Validation issues pertaining to the experimental data from the Burro, Coyote, and Falcon series of LNG dispersion experiments are also discussed. A description of the atmosphere is provided as well as discussion on the inclusion of the Coriolis force to model very large LNG spills.

Luketa-Hanlin, Anay Josephine; Koopman, Ronald P. (Lawrence Livermore National Laboratory, Livermore, CA); Ermak, Donald (Lawrence Livermore National Laboratory, Livermore, CA)

2006-02-01T23:59:59.000Z

205

CX-005632: Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

Fast Responding Voltage Regulator and Dynamic VAR Compensator with Direct Medium Voltage ConnectionCX(s) Applied: A1, A11, B4.4, B5.1Date: 04/19/2011Location(s): Durham, North CarolinaOffice(s): Electricity Delivery and Energy Reliability, National Energy Technology Laboratory

206

CX-005633: Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

Fast Responding Voltage Regulator and Dynamic VAR Compensator with Direct Medium Voltage ConnectionCX(s) Applied: A1, A11, B3.6, B4.4, B5.1Date: 04/19/2011Location(s): San Jose, CaliforniaOffice(s): Electricity Delivery and Energy Reliability, National Energy Technology Laboratory

207

26 July 2000 TESLA Report 2000-13 Compensation of Solenoid Effects at the TESLA  

E-Print Network (OSTI)

26 July 2000 TESLA Report 2000-13 Compensation of Solenoid Effects at the TESLA Interaction Point at the TESLA interaction point is 5 nm. The long solenoid encompassing the detector introduces coupling effects along the beam line. This is a concern for a linear collider such as TESLA, where the vertical beam size

208

Sound-Based ranging system in greenhouse environment with multipath effect compensation using artificial neural network  

Science Conference Proceedings (OSTI)

In this study, sound-based ranging system in greenhouse environment with compensation of measurement error caused by multipath effect using Artificial Neural Network (ANN) was proposed. Greenhouse environment has special characteristic which is different ... Keywords: ANN, greenhouse, multipath effect, sound-based ranging system

Slamet Widodo; Tomoo Shiigi; Naing Min Than; Yuichi Ogawa; Naoshi Kondo

2012-11-01T23:59:59.000Z

209

Comparative study for EAF's reactive energy compensation methods and power factor improvement  

Science Conference Proceedings (OSTI)

In this paper is analyzing the current operating conditions of one electric arc furnace (EAF) in order to evaluate the best option to solve the energy consumption problem. Experimental results show that EAFs represent a substantial source of electric ... Keywords: electric arc furnace, flicker, harmonic analysis, improvement, power factor, reactive compensator

Deaconu Sorin Ioan; Popa Gabriel Nicolae; Tihomir Latinovic

2010-09-01T23:59:59.000Z

210

Four-wave mixing, quantum control and compensating losses in doped negative-index photonic metamaterials  

E-Print Network (OSTI)

The possibility of compensating absorption in negative-index metatamterials (NIMs) doped by resonant nonlinear-optical centers is shown. The role of quantum interference and extraordinary properties of four-wave parametric amplification of counter-propagating electromagnetic waves in NIMs are discussed.

Popov, Alexander K; George, Thomas F; Shalaev, Vladimir M

2007-01-01T23:59:59.000Z

211

Four-wave mixing, quantum control and compensating losses in doped negative-index photonic metamaterials  

E-Print Network (OSTI)

The possibility of compensating absorption in negative-index metatamterials (NIMs) doped by resonant nonlinear-optical centers is shown. The role of quantum interference and extraordinary properties of four-wave parametric amplification of counter-propagating electromagnetic waves in NIMs are discussed.

Alexander K. Popov; Sergey A. Myslivets; Thomas F. George; Vladimir M. Shalaev

2007-08-01T23:59:59.000Z

212

Radiometric compensation for a low-cost immersive projection system Julien DEHOS  

E-Print Network (OSTI)

Radiometric compensation for a low-cost immersive projection system Julien DEHOS Eric ZEGHERS Catopsys is a low-cost projection system aiming at making mixed reality (virtual, augmented or diminished the optical axis of P. the home by developing a low-cost immersive projection system. This system is composed

Paris-Sud XI, Université de

213

Power Smoothing Control in a Grid-Connected Marine Current Turbine System for Compensating  

E-Print Network (OSTI)

of generator power. In the second step, Super-capacitor (SC) Energy Storage System (ESS) is added to compensate, supercapacitor. NOMENCLATURE ESS Energy storage system MCT Marine current turbine MPPT Maximum power point tracking PMSG Permanent-magnet synchronous generator SoC State of charge SC Supercapacitor , , Magnitude

Brest, Université de

214

UC COMPENSATION FOR INJURY 1a. GENERAL PROVISION OF MEDICAL TREATMENT OR REIMBURSEMENT OF MEDICAL COST  

E-Print Network (OSTI)

UC COMPENSATION FOR INJURY GUIDELINES 1a. GENERAL PROVISION OF MEDICAL TREATMENT OR REIMBURSEMENT OF MEDICAL COST The University of California will provide to any injured subject any and all medical or illness is a consequence of a medical research procedure which is designed to benefit the subject directly

El Zarki, Magda

215

Temperature compensated and self-calibrated current sensor using reference current  

DOE Patents (OSTI)

A method is described to provide temperature compensation and self-calibration of a current sensor based on a plurality of magnetic field sensors positioned around a current carrying conductor. A reference electrical current carried by a conductor positioned within the sensing window of the current sensor is used to correct variations in the output signal due to temperature variations and aging.

Yakymyshyn, Christopher Paul (Seminole, FL); Brubaker, Michael Allen (Loveland, CO); Yakymyshyn, Pamela Jane (Seminole, FL)

2008-01-22T23:59:59.000Z

216

Temperature compensated and self-calibrated current sensor using reference magnetic field  

DOE Patents (OSTI)

A method is described to provide temperature compensation and self-calibration of a current sensor based on a plurality of magnetic field sensors positioned around a current carrying conductor. A reference magnetic field generated within the current sensor housing is detected by the magnetic field sensors and is used to correct variations in the output signal due to temperature variations and aging.

Yakymyshyn, Christopher Paul (Seminole, FL); Brubaker, Michael Allen (Loveland, CO); Yakymyshyn, Pamela Jane (Seminole, FL)

2007-10-09T23:59:59.000Z

217

Backscatter-contour-attenuation joint estimation model for attenuation compensation in ultrasound imagery  

Science Conference Proceedings (OSTI)

Ultrasound B-scan exhibits shadowing and enhancement artifacts due to acoustic wave propagation and spatially varying scatter attenuation across layers of tissues. These artifacts hide underlying echo signals that are truly clinically indicative of diseases. ... Keywords: attenuation compensation, backscatter, optimization, shadowing artifact, ultrasound imaging

Yongjian Yu; Jue Wang

2010-10-01T23:59:59.000Z

218

Meridional Energy Transport in the Coupled Atmosphere–Ocean System: Compensation and Partitioning  

Science Conference Proceedings (OSTI)

The variability and compensation of the meridional energy transport in the atmosphere and ocean are examined with the state-of-the-art GFDL Climate Model, version 2.1 (CM2.1), and the GFDL Intermediate Complexity Coupled Model (ICCM). On decadal ...

Riccardo Farneti; Geoffrey K. Vallis

2013-09-01T23:59:59.000Z

219

Energy Storage and Reactive Power Compensator in a Large Wind Farm: Preprint  

Science Conference Proceedings (OSTI)

The size of wind farm power systems is increasing, and so is the number of wind farms contributing to the power systems network. The size of wind turbines is also increasing--from less than 1 MW a few years ago to the 2- to 3-MW machines being installed today and the 5-MW machines under development. The interaction of the wind farm, energy storage, reactive power compensation, and the power system network is being investigated. Because the loads and the wind farms' output fluctuate during the day, the use of energy storage and reactive power compensation is ideal for the power system network. Energy storage and reactive power compensation can minimize real/reactive power imbalances that can affect the surrounding power system. In this paper, we will show how the contribution of wind farms affects the power distribution network and how the power distribution network, energy storage, and reactive power compensation interact when the wind changes. We will also investigate the size of the components in relation to each other and to the power system.

Muljadi, E.; Butterfield, C. P.; Yinger, R.; Romanowitz, H.

2003-10-01T23:59:59.000Z

220

National Nuclear Security Administration Contractors' Disability Compensation and Return-to-Work Programs, IG-0867  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Audit Report Audit Report The National Nuclear Security Administration Contractors' Disability Compensation and Return-to-Work Programs DOE/IG-0867 June 2012 U.S. Department of Energy Office of Inspector General Office of Audits and Inspections Department of Energy Washington, DC 20585 June 18, 2012 MEMORANDUM FOR THE SECRETARY FROM: Gregory H. Friedman Inspector General SUBJECT: INFORMATION: Audit Report on "NNSA Contractors' Disability Compensation and Return-to-Work Programs" INTRODUCTION AND OBJECTIVE The Department of Energy's National Nuclear Security Administration is responsible for the Nation's nuclear weapons programs. NNSA relies on contractors to manage and operate the seven sites that form its nuclear security enterprise, including three national laboratories. Under

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


221

Energy Employees Occupational Illness Compensation Program Act Interviews of Current and Former Workers  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

February 1, 2010 February 1, 2010 MEMORANDUM FOR DISTRIBUTION "" ( "· FROM: DANIEL B. PONE~ SUBJECT: Energy Employees Occupational Illness Compensation Program Act Interviews of Current and Former Workers The Department embraces its responsibility for and commitment to the health and well- being of the Department of Energy's (DOE) current and former workers, both Federal and contractor employees. Two key programs that advance DO E's commitment to its former and current workers are the Department of Labor (DOL) managed Energy Employees Occupational Illness Compensation Program (EEOICP) and the Former Worker Medical Screening Program. In the context of support to EEOICP, DOE's role is to work on behalf of the program claimants to make sure that all available worker and

222

Summary of the LARP Mini-Workshop on Beam-Beam Compensation 2007  

SciTech Connect

The LARP Mini-Workshop on Beam-Beam Compensation 2007 was held at SLAC, 2-4 July 2007. It was attended by 33 participants from 10 institutions in Asia, Europe, and America. 26 presentations were given, while more than one third of the time was allocated to discussions. The workshop web site is Ref. [1]. The workshop's main focus was on long-range and head-on beam-beam compensation, with a view towards application in the LHC. Other topics included the beam-beam performance of previous, existing and future circular colliders; beam-beam simulations; new operating modes, theory, and unexplained phenomena. This summary is also published as Ref. [2].

Fischer, Wolfram; /Brookhaven; Bruning, Oliver S.; Koutchouk, J.P.; Zimmermann, F.; /CERN; Sen, T.; Shiltsev, V.; /Fermilab; Ohmi, K.; /KEK, Tsukuba; Furman, M.; /LBL, Berkeley; Cai, Y.; Chao, A.; /SLAC

2011-11-07T23:59:59.000Z

223

Examination of a PHEV Bi-Directional Charger System for V2G Reactive Power Compensation  

SciTech Connect

Plug-in hybrid electric vehicles (PHEVs) potentially have the capability to fulfill the energy storage needs of the electric grid by supplying ancillary services such as reactive power compensation. However, in order to allow bidirectional power transfer, the PHEV battery charger should be designed to manage such capability. While many different battery chargers have been available since the inception of the first electric vehicles (EVs), an on-board, conductive charger with bidirectional power transferring capability have recently drawn attention due to their inherent advantages in charging accessibility, ease of use and efficiency. In this study, a reactive power compensation case study using the inverter dc-link capacitor is given when a PHEV battery is under charging operation. Finally, the impact of providing these services on the batteries is also explained.

Kisacikoglu, Mithat C [ORNL; Ozpineci, Burak [ORNL; Tolbert, Leon M [ORNL

2010-01-01T23:59:59.000Z

224

Towards loss compensated and lasing terahertz metamaterials based on optically pumped graphene  

E-Print Network (OSTI)

It is evidenced by numerical calculations that optically pumped graphene is suitable for compensating inherent loss in terahertz (THz) metamaterials. In a first step, the complex conductivity of graphene under optical pumping is calculated and the proper conditions for terahertz amplification in single layer graphene are determined. It is shown that amplification in graphene occurs for temperatures up to room temperature and for moderate pump intensities when pumped at a telecommunication wavelength $\\lambda=1.5~\\mathrm{\\mu m}$. Furthermore, the amplification properties of graphene are evaluated and discussed at a temperature as low as $T=77~\\mathrm{K}$ and a pump intensity $I=300~\\mathrm{mW/mm^2}$ to investigate the coupling between graphene and a plasmonic split ring resonator (SRR) metamaterial. The contributions of ohmic and dielectric loss mechanisms are studied by full wave simulations. As a result, it is found that the loss of a split-ring resonator metamaterial can be compensated by optically stimulat...

Weis, Peter; Rahm, Marco

2013-01-01T23:59:59.000Z

225

Simulations of coherent beam-beam effects with head-on compensation  

SciTech Connect

Electron lenses are under construction for installation in RHIC in order to mitigate the head-on beam-beam effects. This would allow operation with higher bunch intensity and result in a significant increase in luminosity. We report on recent strong-strong simulations and experiments that were carried out using the RHIC upgrade parameters to assess the impact of coherent beam-beam effects in the presence of head-on compensation.

White S.; Fischer, W.; Luo. Y.

2012-05-20T23:59:59.000Z

226

Net-Shape Forging of Aerofoil Blade based on Flash Trimming and Compensation methods  

SciTech Connect

In this research, an automatic blade forging die shape optimisation system was developed by using direct compensation and flash trimming algorithms and integrating with the DEFORM 3D software package. To validate the developed system, a 3D blade forging case problem was simulated and optimised with and without the consideration of trimming simulation. The results were compared with actual measurement data of the forged aerofoil blade with excellent results obtained with the fast trimming simulation procedure used.

Lu, B. [Department of Plasticity Forming Engineering, Shanghai Jiao Tong University, Shanghai, 200030 (China); Ou, H. [Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Nottingham, NG7 2RD (United Kingdom); Armstrong, C. G. [School of Mechanical and Aerospace Engineering, Queen' s University Belfast, Belfast, BT9 5AH (United Kingdom)

2011-05-04T23:59:59.000Z

227

COMPENSATION FOR BUNCH EMITTANCE IN A MAGNETIZATION AND SPACE CHARGE DOMINATED BEAM.  

Science Conference Proceedings (OSTI)

In order to obtain sufficient cooling rates for the Relativistic Heavy Ion Collider (RHIC) electron cooling, a bunched beam with high bunch charge, high repetition frequency and high energy is required and it is necessary to use a ''magnetized'' beam, i.e., an electron beam with non-negligible angular momentum. Applying a longitudinal solenoid field on the cathode can generate such a beam, which rotates around its longitudinal axis in a field-free region. This paper suggests how a magnetized beam can be accelerated and transported from a RF photocathode electron gun to the cooling section without significantly increasing its emittance. The evolution of longitudinal slices of the beam under a combination of space charge and magnetization is investigated, using paraxial envelope equations and numerical simulations. We find that we must modify the traditional method of compensating for emittance as used for normal non-magnetized beam with space charge to account for magnetization. The results of computer simulations of successful compensation are presented. Alternately, we show an electron bunch density distribution for which all slices propagate uniformly and which does not require emittance compensation.

CHANG,X.; BEN-ZVI,I.; KEWISCH,J.

2004-06-21T23:59:59.000Z

228

A novel control strategy for dynamic voltage restorer using decoupled multiple reference frame PLL (DMRF-PLL)  

Science Conference Proceedings (OSTI)

This paper presents a new control scheme for dynamic voltage restorer (DVR), which consists of a set of series and shunt converters connected back-to-back (BTB), three series transformers, and a dc capacitor installed on the common dc-link. The DVR is ... Keywords: dc capacitor control, decoupled multiple reference frame phase locked loop (DMRF-PLL), dynamic voltage restorer, harmonic and unbalanced voltage compensation, series converters, shunt converters, voltage sag detection

Lin Xu; Yang Han; M. M. Khan; Lidan Zhou; Gang Yao; Chen Chen; Jumin Pan

2009-02-01T23:59:59.000Z

229

Effects of Salt Compensation on the Climate Model Response in Simulations of Large Changes of the Atlantic Meridional Overturning Circulation  

Science Conference Proceedings (OSTI)

Freshwater hosing experiments with a comprehensive coupled climate model and a coupled model of intermediate complexity are performed with and without global salt compensation in order to investigate the robustness of the bipolar seesaw. In both ...

Thomas F. Stocker; Axel Timmermann; Manuel Renold; Oliver Timm

2007-12-01T23:59:59.000Z

230

Dynamic tariffs  

SciTech Connect

The general theoretical models of dynamic tariffs, such as spot pricing, are extended in this paper to include the issues of optimal response of industrial consumers and the effect of large scale penetration of these tariffs on the utility load curve. If such tariffs are to serve their purpose consumers need to acquire the ability for flexible and dynamic response. While the hardware for this is readily available the theoretical models and software systems are not. These issues are examined and correlated with industrial site studies. A systematic analysis of the effect of significant consumer response on the system load curve is next undertaken. A methodologically sound approach to system load and price forecasting is presented.

David, A.K.; Lee, Y.C.

1989-08-01T23:59:59.000Z

231

Experimental investigation of a moving averaging algorithm for motion perpendicular to the leaf travel direction in dynamic MLC target tracking  

SciTech Connect

Purpose: In dynamic multileaf collimator (MLC) motion tracking with complex intensity-modulated radiation therapy (IMRT) fields, target motion perpendicular to the MLC leaf travel direction can cause beam holds, which increase beam delivery time by up to a factor of 4. As a means to balance delivery efficiency and accuracy, a moving average algorithm was incorporated into a dynamic MLC motion tracking system (i.e., moving average tracking) to account for target motion perpendicular to the MLC leaf travel direction. The experimental investigation of the moving average algorithm compared with real-time tracking and no compensation beam delivery is described. Methods: The properties of the moving average algorithm were measured and compared with those of real-time tracking (dynamic MLC motion tracking accounting for both target motion parallel and perpendicular to the leaf travel direction) and no compensation beam delivery. The algorithm was investigated using a synthetic motion trace with a baseline drift and four patient-measured 3D tumor motion traces representing regular and irregular motions with varying baseline drifts. Each motion trace was reproduced by a moving platform. The delivery efficiency, geometric accuracy, and dosimetric accuracy were evaluated for conformal, step-and-shoot IMRT, and dynamic sliding window IMRT treatment plans using the synthetic and patient motion traces. The dosimetric accuracy was quantified via a {gamma}-test with a 3%/3 mm criterion. Results: The delivery efficiency ranged from 89 to 100% for moving average tracking, 26%-100% for real-time tracking, and 100% (by definition) for no compensation. The root-mean-square geometric error ranged from 3.2 to 4.0 mm for moving average tracking, 0.7-1.1 mm for real-time tracking, and 3.7-7.2 mm for no compensation. The percentage of dosimetric points failing the {gamma}-test ranged from 4 to 30% for moving average tracking, 0%-23% for real-time tracking, and 10%-47% for no compensation. Conclusions: The delivery efficiency of moving average tracking was up to four times higher than that of real-time tracking and approached the efficiency of no compensation for all cases. The geometric accuracy and dosimetric accuracy of the moving average algorithm was between real-time tracking and no compensation, approximately half the percentage of dosimetric points failing the {gamma}-test compared with no compensation.

Yoon, Jai-Woong; Sawant, Amit; Suh, Yelin; Cho, Byung-Chul; Suh, Tae-Suk; Keall, Paul [Department of Biomedical Engineering, College of Medicine, Catholic University of Korea, Seoul, Korea 131-700 and Research Institute of Biomedical Engineering, Catholic University of Korea, Seoul, 131-700 (Korea, Republic of); Department of Radiation Oncology, Stanford University, Stanford, California 94305 (United States); Department of Radiation Oncology, Stanford University, Stanford, California 94305 (United States) and Department of Radiation Oncology, Asan Medical Center, Seoul, 138-736 (Korea, Republic of); Department of Biomedical Engineering, College of Medicine, Catholic University of Korea, Seoul, 131-700 and Research Institute of Biomedical Engineering, Catholic University of Korea, Seoul, 131-700 (Korea, Republic of); Department of Radiation Oncology, Stanford University, Stanford, California 94305 (United States) and Radiation Physics Laboratory, Sydney Medical School, University of Sydney, 2006 (Australia)

2011-07-15T23:59:59.000Z

232

1980 national survey of compensation paid scientists and engineers engaged in research and development activities  

Science Conference Proceedings (OSTI)

In November of 1966, the United States Department of Energy awarded a contract to the Columbus Laboratories of Battelle to design a survey of compensation paid to scientific and engineering personnel engaged in research and development in the United States. The contract provided that such a survey would utilize the maturity or age-wage approach, under which salary data would be related to years since receipt of degree or chronological age. This document reports the results of the thirteenth annual survey, conducted in 1980.

Not Available

1980-12-01T23:59:59.000Z

233

Environmental Guidance Program Reference Book: Comprehensive Environmentally Response, Compensation, and Liability Act  

SciTech Connect

This Reference Book contains a current copy of the Comprehensive Environmental Response Compensation, and Liability Act and those regulations that implement the statute and appear to be most relevant to Department of Energy (DOE) activities. The document is provided to DOE and contractor staff for informational purposes only and should not be interpreted as legal guidance. Updates that include important new requirements will be provided periodically. Questions concerning this Reference Book may be directed to Mark Petts, EH-231 (FTS 896-2609 or Commercial 202/586-2609).

Not Available

1991-12-31T23:59:59.000Z

234

An investigation of Bjerknes Compensation in the Southern Ocean in the CCSM4  

DOE Green Energy (OSTI)

This project aims to understand the relationship between poleward oceanic and atmospheric heat transport in the Southern Ocean by analyzing output from the community Climate System Model Version 4 (CCSM4). In particular, time series of meridional heat transport in both the atmosphere and the ocean are used to study whether variability in ocean heat transport is balanced by opposing changes in atmospheric heat transport, called Bjerknes Compensation. It is shown that the heat storage term in the Southern Ocean has a significant impact on the oceanic heat budget; as a result, no robust coherences between oceanic and atmospheric heat transports could be found at these southern latitudes.

Weijer, Wilbert [Los Alamos National Laboratory; Kinstle, Caroline M. [Los Alamos National Laboratory

2012-08-28T23:59:59.000Z

235

Status of RHIC head-on beam-beam compensation project  

Science Conference Proceedings (OSTI)

Two electron lenses are under construction for RHIC to partially compensate the head-on beam-beam effect in order to increase both the peak and average luminosities. The final design of the overall system is reported as well as the status of the component design, acquisition, and manufacturing. An overview of the RHIC head-on beam-beam compensation project is given in [1], and more details in [2]. With 2 head-on beam-beam interactions in IP6 and IP8, a third interaction with a low-energy electron beam is added near IP10 to partially compensate the the head-on beam-beam effect. Two electron lenses are under construction, one for each ring. Both will be located in a region common to both beams, but each lens will act only on one beam. With head-on beam-beam compensation up to a factor of two improvement in luminosity is expected together with a polarized source upgrade. The current RHIC polarized proton performance is documented in Ref. [4]. An electron lens (Fig. 1) consists of an DC electron gun, warm solenoids to focus the electron beam during transport, a superconducting main solenoid in which the interaction with the proton beam occurs, steering magnets, a collector, and instrumentation. The main developments in the last year are given below. The experimental program for polarized program at 100 GeV was expected to be finished by the time the electron lenses are commissioned. However, decadal plans by the RHIC experiments STAR and PHENIX show a continuing interest at both 100 GeV and 250 GeV, and a larger proton beam size has been accommodated in the design (Tab. 1). Over the last year beam and lattice parameters were optimized, and RHIC proton lattices are under development for optimized electron lens performance. The effect of the electron lens magnetic structure on the proton beam was evaluated, and found to be correctable. Experiments were done in RHIC and the Tevatron.

Fischer, W.; Anerella, M.; Beebe, E.; Bruno, D.; Gassner, D.M.; Gu, X.; Gupta, R.C.; Hock, J.; Jain, A.K.; Lambiase, R.; Liu, C.; Luo, Y.; Mapes, M.; Montag, C.; Oerter, B.; Okamura, M.; Pikin, A.I.; Raparia, D.; Tan, Y.; Than, R.; Thieberger, P.; Tuozzolo, J.; Zhang, W.

2011-03-28T23:59:59.000Z

236

Detailed design, fabrication and testing of an engineering prototype compensated pulsed alternator. Final report  

DOE Green Energy (OSTI)

The design, fabrication, and test results of a prototype compensated pulsed alternator are discussed. The prototype compulsator is a vertical shaft single phase alternator with a rotating armature and salient pole stator. The machine is designed for low rep rate pulsed duty and is sized to drive a modified 10 cm Beta amplifier. The load consists of sixteen 15 mm x 20 mm x 112 cm long xenon flashlamps connected in parallel. The prototype compulsator generates an open circuit voltage of 6 kV, 180 Hz, at a maximum design speed of 5400 rpm. At maximum speed, the inertial energy stored in the compulsator rotor is 3.4 megajoules.

Bird, W.L. Jr.; Woodson, H.H.

1980-03-01T23:59:59.000Z

237

Dynamic Voltage Regulation Using Distributed Energy Resources  

Science Conference Proceedings (OSTI)

Many distributed energy resources (DE) are near load centres and equipped with power electronics converters to interface with the grid, therefore it is feasible for DE to provide ancillary services such as voltage regulation, nonactive power compensation, and power factor correction. A synchronous condenser and a microturbine with an inverter interface are implemented in parallel in a distribution system to regulate the local voltage. Voltage control schemes of the inverter and the synchronous condenser are developed. The experimental results show that both the inverter and the synchronous condenser can regulate the local voltage instantaneously, while the dynamic response of the inverter is faster than the synchronous condenser; and that integrated voltage regulation (multiple DE perform voltage regulation) can increase the voltage regulation capability, increase the lifetime of the equipment, and reduce the capital and operation costs.

Xu, Yan [ORNL; Rizy, D Tom [ORNL; Li, Fangxing [ORNL; Kueck, John D [ORNL

2007-01-01T23:59:59.000Z

238

1990 National Compensation Survey of Research and Development Scientists and Engineers  

Science Conference Proceedings (OSTI)

This report presents the results of the fourth in a new series of surveys of compensation and benefits for research and development (R D) scientists and engineers (S Es). The 1990 Survey represents the largest nationwide database of its kind, covering 104 establishments which provided data on almost 41,000 degreed researchers in the hard'' sciences. The fundamental nature of the survey has not changed: the focus is still on medium- and large-sized establishments which employ at least 100 degreed S Es in R D. The 1990 Survey contains data which cover about 18% of all establishments eligible to participate, encompassing approximately 18% of all eligible employees. As in the last three years, the survey sample constitutes a fairly good representation of the entire population of eligible establishments on the basis of business sector, geographic location, and size. Maturity-based analyses of salaries for some 34,000 nonsupervisory researchers are provided, as are job content-based analyses of more than 27,000 individual contributors and almost 5000 first level supervisors and division directors. Compensation policies and practices data are provided for 102 establishments, and benefits plans for 62 establishments are analyzed.

Not Available

1990-11-01T23:59:59.000Z

239

Electronic measurement apparatus movable in a cased borehole and compensating for casing resistance differences  

DOE Patents (OSTI)

Methods of operation are described for an apparatus having at least two pairs of voltage measurement electrodes vertically disposed in a cased well to measure the resistivity of adjacent geological formations from inside the cased well. During stationary measurements with the apparatus at a fixed vertical depth within the cased well, the invention herein discloses methods of operation which include a measurement step and subsequent first and second compensation steps respectively resulting in improved accuracy of measurement. The invention also discloses multiple frequency methods of operation resulting in improved accuracy of measurement while the apparatus is simultaneously moved vertically in the cased well. The multiple frequency methods of operation disclose a first A.C. current having a first frequency that is conducted from the casing into formation and a second A.C. current having a second frequency that is conducted along the casing. The multiple frequency methods of operation simultaneously provide the measurement step and two compensation steps necessary to acquire accurate results while the apparatus is moved vertically in the cased well. 6 figures.

Vail, W.B. III.

1991-12-24T23:59:59.000Z

240

Experimental verification of a real-time compensation functionality for dose changes due to target motion in scanned particle therapy  

SciTech Connect

Purpose: Implementation and experimental assessment of a real-time dose compensation system for beam tracking in scanned carbon beam therapy of intrafractionally moving targets. Methods: A real-time dose compensation functionality has been developed and implemented at the experimental branch of the beam tracking system at GSI Helmholtzzentrum fuer Schwerionenforschung (GSI). Treatment plans for different target geometries have been optimized. They have been delivered using scanned carbon ions with beam tracking (BT) and real-time dose compensation combined with beam tracking (RDBT), respectively. Target motion was introduced by a rotating table. Dose distributions were assessed by ionization chamber measurements and dose reconstructions. These distributions have been compared to stationary delivery for BT as well as RDBT. Additionally simulations have been performed to investigate the dependence of delivered dose distributions on varying motion starting phases for BT and RDBT, respectively. Results: Average measured dose differences between static delivery and motion influenced delivery could be reduced from 27-68 mGy when BT was used to 12-37 mGy when RDBT was used. Nominal dose was 1000 mGy. Simulated dose deliveries showed improvements in dose delivery and robustness against varying starting motion phases when RDBT was used. Conclusions: A real-time dose compensation functionality extending the existing beam tracking functionality has been implemented and verified by measurements. Measurements and simulated dose deliveries show that real-time dose compensation can substantially improve delivered dose distributions for large rotational target motion compared to beam tracking alone.

Luechtenborg, Robert; Saito, Nami; Durante, Marco; Bert, Christoph [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany Technische Universitaet Darmstadt, Institut fuer Festkoerperphysik, Hochschulstrasse 6-8, 64289 Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany Technische Universitaet Darmstadt, Institut fuer Festkoerperphysik, Hochschulstrasse 6-8, 64289 Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt (Germany)

2011-10-15T23:59:59.000Z

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


241

Evaluating dosimetric accuracy of flattening filter free compensator-based IMRT: Measurements with diode arrays  

Science Conference Proceedings (OSTI)

Purpose: Compensator-based IMRT coupled with the high dose rate flattening filter free (FFF) beams offers an intriguing possibility of delivering an intensity modulated radiation field in just a few seconds. As a first step, the authors evaluate the dosimetric accuracy of the treatment planning system (TPS) FFF beam model with compensators. Methods: A 6 MV FFF beam from a TrueBeam accelerator (Varian Medical Systems, Palo Alto CA) was modeled in PINNACLE TPS (v. 9.0, Philips Radiation Oncology, Fitchburg WI). Flat brass slabs from 0.3 to 7 cm thick and an 18 deg. brass wedge were used to adjust the beam model. A 2D (MAPCHECK) and 3D (ARCCHECK) diode arrays (Sun Nuclear Corp, Melbourne FL), were investigated for use with the compensator FFF beams. Corrections for diode sensitivity caused by the spectral changes in the beam were introduced. Four compensator plans based on the AAPM TG-119 report were developed. A composite ion chamber measurement, beam by beam MAPCHECK measurements, and a composite ARCCHECK measurement were performed. The array results were analyzed with the same thresholds as in TG-119 report--3%/3 mm with global dose normalization--as well as with the more stringent combinations of the gamma analysis criteria. Results: The FFF beam shows a greater variation of the effective attenuation coefficient with brass thickness due to the prevalence of the low energy photons compared to the conventional 6X beam. As a result, a compromise had to be made while trying to achieve dose agreement for a combination of field sizes, brass thicknesses, and measurement depths ({>=}5 cm in water). An agreement of measured and calculated dose to within 1% was observed for brass thicknesses up to 2 cm. For the 3 cm slab, an error of up to 2.8% was noted for the field sizes above 10 x 10 cm{sup 2}, and up to 3.8% for the 5 x 5 cm{sup 2} field. Both diode arrays exhibit a substantial sensitivity drop as the compensator thickness increases, reaching 10% for a 7 cm brass slab. A simple correction based on the brass thickness along the ray was introduced to counteract this effect. Pooled for five profiles, the average ratio of uncorrected and corrected MAPCHECK to ion chamber readings are 0.966 and 1.008, respectively. With the proper correction, all MAPCHECK measurement to calculation comparisons exhibit 100%{gamma}(3%/3 mm) passing rates with global dose-error normalization. For the TG-119-type plans, the average {gamma}(2%/2 mm) passing rate with local normalization is 94% (range 87.8%-98.3%). The lower ARCCHECK{gamma}-analysis passing rates (corrected for diode sensitivity) are predictable based on the observed PDD discrepancies. However, with the 3%/3 mm thresholds and global normalization, the average {gamma}-analysis passing rate is 96.4% (range 89.9%-100%). Conclusions: MAPCHECK analysis demonstrates high passing rates with the stringent {gamma}(2%/2 mm) and local normalization criteria combination. The geometry of the ARCCHECK array creates a stress test for the FFF TPS model because of the shallow depth of the entrance diodes and large air cavity. Hence, the ARCCHECK{gamma}-analysis passing rates are lower than with the MAPCHECK, while still on par with TG-119.

Robinson, Joshua; Opp, Daniel; Zhang, Geoffrey; Cashon, Ken; Kozelka, Jakub; Hunt, Dylan; Walker, Luke; Hoffe, Sarah; Shridhar, Ravi; Feygelman, Vladimir [Department of Physics, University of South Florida, Tampa, Florida 33612 (United States); Division of Radiation Oncology, Moffitt Cancer Center, Tampa, Florida 33612 (United States); decimal Inc., Sanford, Florida 32771 (United States); Sun Nuclear Corp., Melbourne, Florida 32940 (United States); Division of Radiation Oncology, Moffitt Cancer Center, Tampa, Florida 33612 (United States)

2012-01-15T23:59:59.000Z

242

Defect processes involving oxygen-compensated sites in CaF/sub 2/ precipitates doped with lanthanides and actinides  

Science Conference Proceedings (OSTI)

Oxygen incorporation into calcium fluoride precipitates doped with lanthanides and actinides is investigated by use of the technique of site-selective spectroscopy. Fluorescence from erbium in specific fluoride- and oxygen-compensated sites is monitored as a function of the ignition temperature of the precipitate to study the conversion from fluoride to oxygen compensation. Another process, thermal annealing of a disordered precipitate to give a well-defined lattice, is also followed. Changes in both oxygen compensation formation and lattice annealing are found to occur upon the addition of other trivalent and monovalent ions. The results provide a better understanding of the solid-state chemistry involved in new methods of chemical analysis using rare-earth doped CaF/sub 2/ precipitates, and how certain interference effects can arise. Also included is a study of the temperature dependence of fluorescent sites in CaF/sub 2/:U/sup 6 +/.

Johnston, M.V.; Wright, J.C.

1981-10-15T23:59:59.000Z

243

Methods of operation of apparatus measuring formation resistivity from within a cased well having one measurement and two compensation steps  

DOE Patents (OSTI)

Methods of operation of an apparatus having at least two pairs of voltage measurement electrodes vertically disposed in a cased well to measure the resistivity of adjacent geological formations from inside the cased well. During stationary measurements with the apparatus at a fixed vertical depth within the cased well, the invention herein discloses methods of operation which include a measurement step and subsequent first and second compensation steps respectively resulting in improved accuracy of measurement. First and second order errors of measurement are identified, and the measurement step and two compensation steps provide methods to substantially eliminate their influence on the results. A multiple frequency apparatus adapted to movement within the well is described which simultaneously provide the measurement and two compensation steps.

Vail, III, William B. (Bothell, WA)

1993-01-01T23:59:59.000Z

244

Three Essays on Price Dynamics and Causations among Energy Markets and Macroeconomic Information  

E-Print Network (OSTI)

This dissertation examines three important issues in energy markets: price dynamics, information flow, and structural change. We discuss each issue in detail, building empirical time series models, analyzing the results, and interpreting the findings. First, we examine the contemporaneous interdependencies and information flows among crude oil, natural gas, and electricity prices in the United States (US) through the multivariate generalized autoregressive conditional heteroscedasticity (MGARCH) model, Directed Acyclic Graph (DAG) for contemporaneous causal structures and Bernanke factorization for price dynamic processes. Test results show that the DAG from residuals of out-of-sample-forecast is consistent with the DAG from residuals of within-sample-fit. The result supports innovation accounting analysis based on DAGs using residuals of out-of-sample-forecast. Second, we look at the effects of the federal fund rate and/or WTI crude oil price shock on US macroeconomic and financial indicators by using a Factor Augmented Vector Autoregression (FAVAR) model and a graphical model without any deductive assumption. The results show that, in contemporaneous time, the federal fund rate shock is exogenous as the identifying assumption in the Vector Autoregression (VAR) framework of the monetary shock transmission mechanism, whereas the WTI crude oil price return is not exogenous. Third, we examine price dynamics and contemporaneous causality among the price returns of WTI crude oil, gasoline, corn, and the S&P 500. We look for structural break points and then build an econometric model to find the consistent sub-periods having stable parameters in a given VAR framework and to explain recent movements and interdependency among returns. We found strong evidence of two structural breaks and contemporaneous causal relationships among the residuals, but also significant differences between contemporaneous causal structures for each sub-period.

Hong, Sung Wook 1977-

2012-12-01T23:59:59.000Z

245

Excursions in Chemical Dynamics  

E-Print Network (OSTI)

2009). [118] F. A. Cotton, Chemical Applications of GroupExcursions in Chemical Dynamics by Shervin Fatehi AFall 2010 Excursions in Chemical Dynamics Copyright 2010 by

Fatehi, Shervin

2010-01-01T23:59:59.000Z

246

Oil Price Shocks, Inventories, and Macroeconomic Dynamics,” mimeo  

E-Print Network (OSTI)

This paper employs disaggregated manufacturing data to investigate the causes of the time delay between an increase in oil prices and the following slowdown in economic activity. VAR results show that, unlike aggregate GDP, the effect of an oil price shock on new motor vehicles production shows up immediately and is statistically significantly. After one quarter, similar patterns are observed for industries that are oil-intensive or for which motor vehicles constitute a demand-shifter. The continuing fall in manufacturing production then leads the economy into a recession. The paper then estimates a modified linear-quadratic inventory model and shows that this description of the oil price dynamics is consistent with rational behavior by firms. An increase in oil prices leads to a decline in manufacturing sales; partly because the shock catches manufacturers by surprise and partly because of their desire to balance the accelerator and production smoothing motives, manufacturers deviate from the target level of inventories and spread the decline in production over various quarters. Moreover, the dynamics entailed by the structural estimates capture two stylized facts about inventory behavior: procyclicality and persistence.

Ana María Herrera

2008-01-01T23:59:59.000Z

247

Method and system for improved resolution of a compensated calorimeter detector  

DOE Patents (OSTI)

An improved method and system for a depleted uranium calorimeter detector used in high energy physics experiments. In a depleted uranium calorimeter detector, the energy of a particle entering the calorimeter detector is determined and the output response of the calorimeter detector is compensated so that the ratio of the integrated response of the calorimeter detector from a lepton to the integrated response of the calorimeter detector from a hadron of the same energy as the lepton is approximately equal to 1. In the present invention, the energy of a particle entering the calorimeter detector is determined as a function of time and the hadron content of the response of the calorimeter detector is inferred based upon the time structure of the energy pulse measured by the calorimeter detector. The energy measurement can be corrected based on the inference of the hadron content whereby the resolution of the calorimeter can be improved.

Dawson, John W. (Willowbrook, IL)

1991-01-01T23:59:59.000Z

248

Method and system for improved resolution of a compensated calorimeter detector  

DOE Patents (OSTI)

An improved method and system for a depleted uranium calorimeter detector was used in high energy physics experiments. In a depleted uranium calorimeter detector, the energy of a particle entering the calorimeter detector is determined and the output response of the calorimeter detector is compensated so that the ratio of the integrated response of the calorimeter detector from a lepton to the integrated response of the calorimeter detector from a hadron of the same energy as the lepton is approximately equal to 1. In the present invention, the energy of a particle entering the calorimeter detector is determined as a function of time and the hadron content of the response of the calorimeter detector is inferred based upon the time structure of the energy pulse measured by the calorimeter detector. The energy measurement can be corrected based on the inference of the hadron content whereby the resolution of the calorimeter can be improved. 2 figs.

Dawson, J.W.

1989-05-23T23:59:59.000Z

249

Orbit compensation for the time-varying elliptically polarized wiggler with switching frequency at 100 hz  

SciTech Connect

In October 1996, the elliptically polarized wiggler, installed in the X13 straight section of the NSLS X-ray ring, was commissioned at an operating frequency of 100 hz. This wiggler generates circularly polarized photons in the energy range of 0.1 to 10 keV with AC modulation of polarization helicity. The vertical magnetic field is produced by a hybrid permanent magnet structure, and the horizontal magnetic field is generated by an electromagnet capable of switching at frequencies up to 100 hz. Here, the authors discuss the compensation of the residual vertical and horizontal orbit motion utilizing a time-domain algorithm employing a function generator to drive trim coils at the wiggler ends, and the wideband high precision orbit measurement system of the X-ray ring. The residual orbit motion has been reduced to a level below 1 micron, and the device has been run in regular operations with no negative effect on other users.

Singh, O.; Krinsky, S.

1997-07-01T23:59:59.000Z

250

A Novel Approach for Automatic Control of Piezoelectric Elements Used for Lorentz Force Detuning Compensation  

E-Print Network (OSTI)

Abstract: Linear accelerators such as Free Electron Lasers (FELs) use superconducting (SC) resonant cavities to accelerate electron beam to high energies. TESLA type resonators are extremely sensitive to detuning induced by mechanical deformations – Lorentz force detuning (LFD), mainly due to the extremely high quality factor (Q) of the 1.3 GHz resonance mode, in the range of 1e6. The resulting modulation of a resonance frequency of the cavity makes power consumption and stability performances of the Low-Latency Radio Frequency (LLRF) control more critical. In order to minimize the RF control efforts and desired stabilities, the fast piezoelectric actuators with digital control systems are commonly used. The paper presents a novel approach for automatic control of piezoelectric actuators used for compensation of Lorentz force detuning, the practical application and carried out tests in accelerating module ACC6 in Free-Electron Laser in Hamburg (FLASH).

Przygoda, K; Napieralski, A; Grecki, M

2010-01-01T23:59:59.000Z

251

The E-lens test bench for RHIC beam-beam compensation  

SciTech Connect

To compensate for the beam-beam effects from the proton-proton interactions at IP6 and IP8 in the Relativistic Heavy Ion Collider (RHIC), we are fabricating two electron lenses that we plan to install at RHIC IR10. Before installing the e-lenses, we are setting-up the e-lens test bench to test the electron gun, collector, GS1 coil, modulator, partial control system, some instrumentation, and the application software. Some e-lens power supplies, the electronics for current measurement will also be qualified on test bench. The test bench also was designed for measuring the properties of the cathode and the profile of the beam. In this paper, we introduce the layout and elements of the e-lens test bench; and we discuss its present status towards the end of this paper.

Gu X.; Altinbas, F.Z.; Aronson, J.; Beebe, E. et al

2012-05-20T23:59:59.000Z

252

Photovoltaic power converter system with a controller configured to actively compensate load harmonics  

DOE Patents (OSTI)

Photovoltaic power converter system including a controller configured to reduce load harmonics is provided. The system comprises a photovoltaic array and an inverter electrically coupled to the array to generate an output current for energizing a load connected to the inverter and to a mains grid supply voltage. The system further comprises a controller including a first circuit coupled to receive a load current to measure a harmonic current in the load current. The controller includes a second circuit to generate a fundamental reference drawn by the load. The controller further includes a third circuit for combining the measured harmonic current and the fundamental reference to generate a command output signal for generating the output current for energizing the load connected to the inverter. The photovoltaic system may be configured to compensate harmonic currents that may be drawn by the load.

de Rooij, Michael Andrew (Clifton Park, NY); Steigerwald, Robert Louis (Burnt Hills, NY); Delgado, Eladio Clemente (Burnt Hills, NY)

2008-12-16T23:59:59.000Z

253

OUTLIER COMPENSATION IN SENSOR NETWORK SELF-LOCALIZATION VIA THE EM Joshua N. Ash, Randolph L. Moses  

E-Print Network (OSTI)

OUTLIER COMPENSATION IN SENSOR NETWORK SELF-LOCALIZATION VIA THE EM ALGORITHM Joshua N. Ash 43210 ABSTRACT Self-localization is an important component of distributed sensor systems. The presence- mates of the sensor locations [4]. Outliers are inherently handled by including a high variance

Moses, Randolph L.

254

The Use of Compensated Aerological No-Lift Balloons to Determine Relatively Long-Term Dry-Air Parcel Trajectories  

Science Conference Proceedings (OSTI)

A method to compensate the loss of buoyancy due to gas leakage from aerological no-lift balloons is presented. The method is implemented by means of a double vessel device that supplies a constant liquid outflow at constant temperature. It is ...

Benjamin Terliuc; Ephraim Asculai; Eli Doron

1983-10-01T23:59:59.000Z

255

High-speed hardware efficient FIR compensation filter for Delta-Sigma modulator analog-to-digital converter in 0.13 µm CMOS technology  

Science Conference Proceedings (OSTI)

A high-speed hardware efficient 41-tap, 15-bit word length Finite Impulse Response (FIR) Compensation Filter has been designed as a component in a Delta-Sigma Modulator (DSM) Analog-to-Digital Converter (ADC). The filter is targeted for high-throughput ... Keywords: ADC, FIR filter, compensation, delta-sigma, high-speed

Boon-Siang Cheah; Ray Siferd

2005-11-01T23:59:59.000Z

256

Categorical Exclusion (CX) Determinations By Date | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

9, 2011 9, 2011 CX-005634: Categorical Exclusion Determination Characterization of Hydrocarbon Samples and/or Qualitative/Quantitative Analysis of Hydrocarbon Mixtures CX(s) Applied: B3.6 Date: 04/19/2011 Location(s): Pittsburgh, Pennsylvania Office(s): Fossil Energy, National Energy Technology Laboratory April 19, 2011 CX-005633: Categorical Exclusion Determination Fast Responding Voltage Regulator and Dynamic VAR Compensator with Direct Medium Voltage Connection CX(s) Applied: A1, A11, B3.6, B4.4, B5.1 Date: 04/19/2011 Location(s): San Jose, California Office(s): Electricity Delivery and Energy Reliability, National Energy Technology Laboratory April 19, 2011 CX-005632: Categorical Exclusion Determination Fast Responding Voltage Regulator and Dynamic VAR Compensator with Direct

257

Categorical Exclusion Determinations: National Energy Technology Laboratory  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

19, 2011 19, 2011 CX-005634: Categorical Exclusion Determination Characterization of Hydrocarbon Samples and/or Qualitative/Quantitative Analysis of Hydrocarbon Mixtures CX(s) Applied: B3.6 Date: 04/19/2011 Location(s): Pittsburgh, Pennsylvania Office(s): Fossil Energy, National Energy Technology Laboratory April 19, 2011 CX-005633: Categorical Exclusion Determination Fast Responding Voltage Regulator and Dynamic VAR Compensator with Direct Medium Voltage Connection CX(s) Applied: A1, A11, B3.6, B4.4, B5.1 Date: 04/19/2011 Location(s): San Jose, California Office(s): Electricity Delivery and Energy Reliability, National Energy Technology Laboratory April 19, 2011 CX-005632: Categorical Exclusion Determination Fast Responding Voltage Regulator and Dynamic VAR Compensator with Direct

258

Page not found | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

81 - 11690 of 28,560 results. 81 - 11690 of 28,560 results. Download CX-005632: Categorical Exclusion Determination Fast Responding Voltage Regulator and Dynamic VAR Compensator with Direct Medium Voltage Connection CX(s) Applied: A1, A11, B4.4, B5.1 Date: 04/19/2011 Location(s): Durham, North Carolina Office(s): Electricity Delivery and Energy Reliability, National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-005632-categorical-exclusion-determination Download CX-005633: Categorical Exclusion Determination Fast Responding Voltage Regulator and Dynamic VAR Compensator with Direct Medium Voltage Connection CX(s) Applied: A1, A11, B3.6, B4.4, B5.1 Date: 04/19/2011 Location(s): San Jose, California Office(s): Electricity Delivery and Energy Reliability, National Energy Technology Laboratory

259

Page not found | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

71 - 3780 of 9,640 results. 71 - 3780 of 9,640 results. Download CX-005631: Categorical Exclusion Determination Fast Responding Voltage Regulator and Dynamic VAR Compensator with Direct Medium Voltage Connection CX(s) Applied: A1, A11, B3.6, B4.4, B5.1 Date: 04/19/2011 Location(s): Raleigh, North Carolina Office(s): Electricity Delivery and Energy Reliability, National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-005631-categorical-exclusion-determination Download CX-005632: Categorical Exclusion Determination Fast Responding Voltage Regulator and Dynamic VAR Compensator with Direct Medium Voltage Connection CX(s) Applied: A1, A11, B4.4, B5.1 Date: 04/19/2011 Location(s): Durham, North Carolina Office(s): Electricity Delivery and Energy Reliability, National Energy

260

Office of Worker Screening and Compensation Support Workers' Spotlight, November/December 2013  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Al Tseu, former US Paratrooper, speaks with visitors Al Tseu, former US Paratrooper, speaks with visitors to the National Atomic Testing Museum celebrating the National Day of Remembrance I I I s s s s s s u u u e e e 1 1 1 0 0 0 N N N o o o v v v e e e m m m b b b e e e r r r / / / D D D e e e c c c e e e m m m b b b e e e r r r 2 2 2 0 0 0 1 1 1 3 3 3 Office of Worker Screening and Compensation Support I N S I D E T H I S I S S U E : Director's Note 1 Remembrance 1 Staff 2 Beryllium 2 Trivia 2 SERT 3 FWP Milestone 4 Calendar 5 A NOTE FROM THE DIRECTOR By Greg Lewis I had the pleasure of attending and presenting at the recent Joint Outreach Task Group (JOTG) meetings in Livermore and Berkeley, California. Representatives from the Department of Labor (DOL), the National Institute for Occupational Safety and Health, the DOL Ombudsman, and the Worker Health Protection

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


261

High-precision diode-laser-based temperature measurement for air refractive index compensation  

Science Conference Proceedings (OSTI)

We present a laser-based system to measure the refractive index of air over a long path length. In optical distance measurements, it is essential to know the refractive index of air with high accuracy. Commonly, the refractive index of air is calculated from the properties of the ambient air using either Ciddor or Edlen equations, where the dominant uncertainty component is in most cases the air temperature. The method developed in this work utilizes direct absorption spectroscopy of oxygen to measure the average temperature of air and of water vapor to measure relative humidity. The method allows measurement of temperature and humidity over the same beam path as in optical distance measurement, providing spatially well-matching data. Indoor and outdoor measurements demonstrate the effectiveness of the method. In particular, we demonstrate an effective compensation of the refractive index of air in an interferometric length measurement at a time-variant and spatially nonhomogeneous temperature over a long time period. Further, we were able to demonstrate 7 mK RMS noise over a 67 m path length using a 120 s sample time. To our knowledge, this is the best temperature precision reported for a spectroscopic temperature measurement.

Hieta, Tuomas; Merimaa, Mikko; Vainio, Markku; Seppae, Jeremias; Lassila, Antti

2011-11-01T23:59:59.000Z

262

Drum-boiler dynamics  

Science Conference Proceedings (OSTI)

A nonlinear dynamic model for natural circulation drum-boilers is presented. The model describes the complicated dynamics of the drum, downcomer, and riser components. It is derived from first principles, and is characterized by a few physical parameters. ...

K. J. íStröM; R. D. Bell

2000-03-01T23:59:59.000Z

263

Dynamic Residential Window prototype  

NLE Websites -- All DOE Office Websites (Extended Search)

to have dynamic seasonal solar control: high solar gains in the winter with high insulation and low solar gains in the summer. Dynamic, high performance products can be based...

264

General Dynamics, Electric Boat  

Science Conference Proceedings (OSTI)

General Dynamics, Electric Boat. NVLAP Lab Code: 100560-0. Address and Contact Information: 75 Eastern Point Road ...

2013-08-16T23:59:59.000Z

265

NIST Photovoltaic carrier dynamics  

Science Conference Proceedings (OSTI)

... carrier dynamics in novel electronic photovoltaic materials being considered and developed for future solar cell and energy capture applications. ...

2013-04-01T23:59:59.000Z

266

Long-Range And Head-On Beam-Beam Compensation Studies in RHIC With Lessons for the LHC  

Science Conference Proceedings (OSTI)

Long-range as well as head-on beam-beam effects are expected to limit the LHC performance with design parameters. They are are also important consideration for the LHC upgrades. To mitigate long-range effects, current carrying wires parallel to the beam were proposed. Two such wires are installed in RHIC where they allow studying the effect of strong long-range beam-beam effects, as well as the compensation of a single long-range interaction. The tests provide benchmark data for simulations and analytical treatments. Electron lenses were proposed for both RHIC and the LHC to reduce the head-on beam-beam effect. We present the experimental long-range beam-beam program at RHIC and report on head-on compensations studies based on simulations.

Fischer, W.; Luo, Y.; Abreu, N.; Calaga, R.; Montag, C.; Robert-Demolaize, G.; /Brookhaven; Dorda, U.; Koutchouk, J.P.; Sterbini, G.; Zimmermann, F.; /CERN; Kim, H.J.; Sen, T.; Shiltsev, V.; Valishev, A.; /Fermilab; Qiang, J.; /LBL, Berkeley; Kabel, A.; /SLAC

2011-11-28T23:59:59.000Z

267

Long-range and head-on beam-beam compensation studies in RHIC with lessons for the LHC  

SciTech Connect

Long-range as well as head-on beam-beam effects are expected to limit the LHC performance with design parameters. They are also important consideration for the LHC upgrades. To mitigate long-range effects, current carrying wires parallel to the beam were proposed. Two such wires are installed in RHIC where they allow studying the effect of strong long-range beam-beam effects, as well as the compensation of a single long-range interaction. The tests provide benchmark data for simulations and analytical treatments. Electron lenses were proposed for both RHIC and the LHC to reduce the head-on beam-beam effect. We present the experimental long-range beam-beam program at RHIC and report on head-on compensations studies based on simulations.

Fischer, W.; Luo, Y.; Abreu, N.; Calaga, R.; Montag, C.; Robert-Demolaize, G.; Dorda, U.; Koutchouk, J.-P.; Sterbini, G.; Zimmermann, F.; Kim, H.-J.; Sen, T.; Shiltsev, V.; Valishev, A.; Qiang, J.; Kabel, A.

2009-01-12T23:59:59.000Z

268

Long-range and head-on beam-beam compensation studies in RHIC with lessons for the LHC  

SciTech Connect

Long-range as well as head-on beam-beam effects are expected to limit the LHC performance with design parameters. They are also important consideration for the LHC upgrades. To mitigate long-range effects current carrying wires parallel to the beam were proposed. Two such wires are installed in RHIC where they allow studying the effect of strong long-range beam-beam effects, as well as the compensation of a single long-range interaction. The tests provide benchmark data for simulations and analytical treatments. To reduce the head-on beam-beam effect electron lenses were proposed for both RIDC and the LHC. We present the experimental long-range beam-beam program at RHIC and report on head-on compensations studies based on simulations.

Fischer,W.; Luo, Y.; Abreu, N.; Calaga, R.; Montag, C.; Robert-Demolaize, G.; Dorda, U.; Koutchouk, J. -P.; Sterbini, G.; Zimmermann, F.; Kim, H. -J.; Sen, T.; Shiltsev, V.; Valishev, A.; Qiang, J.; Kabel, A.

2008-11-24T23:59:59.000Z

269

Adhesion Force Control and Active Gravitational Compensation for Autonomous Inspection in LPG Storage Spheres  

Science Conference Proceedings (OSTI)

This paper presents a climbing robot based in wheel locomotion and magnetic adherence, a common mechanical topology applicable to a wide range of industrial tasks. The robot is applied to perform internal/external inspection in liquefied petroleum gas ... Keywords: climbing robot, adherence, storage spheres, dynamic control

Andre Schneider de Oliveira; Lucia Valeria Ramos de Arruda; Flavio Neves Jr.; Rodrigo Valerio Espinoza; Joao Pedro Battistella Nadas

2012-10-01T23:59:59.000Z

270

Model-free adaptive control design using evolutionary-neural compensator  

Science Conference Proceedings (OSTI)

It is well-known that conventional control theories are widely suited for applications where the processes can be reasonably described in advance. However, when the plant's dynamics are hard to characterize precisely or are subject to environmental uncertainties, ... Keywords: Differential evolution, Model-free adaptive control, Nonlinear systems, Radial basis function neural network

Leandro dos Santos Coelho; Marcelo Wicthoff Pessôa; Rodrigo Rodrigues Sumar; Antonio Augusto Rodrigues Coelho

2010-01-01T23:59:59.000Z

271

AVESTAR® - Dynamic Modeling  

NLE Websites -- All DOE Office Websites (Extended Search)

Dynamic Modeling Dynamic Modeling The AVESTAR team is pursuing research on the dynamic modeling and simulation of advanced energy systems ranging from power plants to power grids. Dynamic models provide a continuous view of energy systems in action by calculating their transient behavior over time. Plant-wide Models For power plants, dynamic models are used to analyze a wide variety of operating scenarios, including normal base load operation, startup, shutdown, feedstock switchovers, cycling, and load-following. Dynamic process and control models are also essential for analyzing plant responses to setpoint changes and disturbances, as well as malfunctions and abnormal situations. Other applications of plant-wide dynamic models include controllability and operational flexibility analyses, environmental studies, safety evaluations, and risk mitigation.

272

Langevin molecular dynamics derived from Ehrenfest dynamics  

E-Print Network (OSTI)

Stochastic Langevin molecular dynamics for nuclei is derived from quantum classical molecular dynamics, also called Ehrenfest dynamics, at positive temperature, assuming that the molecular bulk system is in equilibrium and that the initial data for the electrons is stochastically perturbed from the ground state. The initial electron probability distribution is derived from the Liouville equilibrium solution generated by the nuclei acting as a heat bath for the electrons. The diffusion and friction coefficients in the Langevin equation satisfy Einstein's fluctuation-dissipation relation. The fluctuating initial data yields, in addition to the fluctuating diffusion terms, also a contribution to the drift, modifying the standard ab initio Born-Oppenheimer solution at zero temperature, where the electrons are in their ground state for the current nuclear configuration. The dissipative friction mechanism comes from the evolution of the electron ground state, due to slow dynamics of the nuclei, while the modified d...

Szepessy, Anders

2007-01-01T23:59:59.000Z

273

Angular Averaged Profiling of the Radial Electric Field in Compensated FTICR Cells  

Science Conference Proceedings (OSTI)

A recent publication from this laboratory (1) reported a theoretical analysis comparing approaches for creating harmonic ICR cells. We considered two examples of static segmented cells - namely, a seven segment cell developed in this laboratory (2) and one described by Rempel et al (3), along with a recently described dynamically harmonized cell (4). This conceptual design for a dynamically harmonized cell has now been reduced to practice and first experimental results obtained with this cell were recently reported in this journal (5). This publication reports details of cell construction and describes its performance in a 7 Tesla Fourier Transform mass spectrometer. Herein, we describe the extension of theoretical analysis presented in (1) to include angular-averaged radial electric field calculations and a discussion of the influence of trapping plates.

Tolmachev, Aleksey V.; Robinson, Errol W.; Wu, Si; Smith, Richard D.; Futrell, Jean H.; Pasa-Tolic, Ljiljana

2012-05-08T23:59:59.000Z

274

Characterization of the environmental fate of Bacillus thuringiensis var. kaurstaki (Btk) after pest eradication efforts in Seattle, WA and Fairfax county, VA  

SciTech Connect

Understanding the fate of biological agents in the environment will be critical to recovery and restoration efforts after a biological attack. Los Alamos National Laboratory (LANL) is conducting experiments in the Seattle, WA and Fairfax County, VA areas to study agent fate in urban environments. As part of their gypsy moth suppression efforts, Washington State and Fairfax County have sprayed Bacillus thuringiensis var. kurstaki (Btk), a common organic pesticide for decades. Many of the spray zones have been in or near urban areas. LANL has collected surface and bulk samples from historical Seattle spray zones to characterize how long Btk persists at detectable levels in the environment, and how long it remains viable in different environmental matrices. This work will attempt to address three questions. First, how long does the agent remain viable at detectable levels? Second, what is the approximate magnitude and duration of resuspension? And third, does the agent transport into buildings? Data designed to address the first question will be presented. Preliminary results indicate Btk remains viable in the environment for at least two years.

Ticknor, Lawrence [Los Alamos National Laboratory; Van Cuyk, Sheila M [Los Alamos National Laboratory; Deshpande, Alina [Los Alamos National Laboratory; Omberg, Kristin M [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

275

Chemical Structure and Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

2154-3 2154-3 UC-400 Annual Report 2000 Chemical Structure and Dynamics Steven D. Colson, Associate Director Robin S. McDowell, Program Manager and the Staff of the Chemical Structure and Dynamics Program April 2001 Prepared for the U.S. Department of Energy under Contract DE-AC06-76RL01830 Chemical Structure and Dynamics 2000 Annual Report Contents Chemical Structure and Dynamics 2000 Annual Report Chemical Structure and Dynamics 2000 Annual Report 1. Introduction Chemical Structure and Dynamics Program......................................................... 1-3 2. Reaction Mechanisms at Liquid Interfaces Structure and Reactivity of Ice Surfaces and Interfaces G. A. Kimmel, Z. Dohnálek, K. P. Stevenson, R. S. Smith,

276

Dynamic Instruction Fusion  

E-Print Network (OSTI)

SANTA CRUZ DYNAMIC INSTRUCTION FUSION A thesis submitted in4 2.2 Instruction Fusion & Complex10 3.1 Fusion Selection

Lee, Ian

2012-01-01T23:59:59.000Z

277

Fundamentals of Dynamic Behavior  

Science Conference Proceedings (OSTI)

Feb 28, 2011 ... Atomistically-Informed Dislocation Dynamics Simulations of High Rate Deformation of Single fcc Crystals: Zhiqiang Wang1; 1University of North ...

278

Dynamic Windows.pdf  

NLE Websites -- All DOE Office Websites (Extended Search)

including products with improved fixed or static properties and products with dynamic solar heat gain proper- ties. Nine representative window products are examined in eight...

279

Partial Dynamical Symmetry and Mixed Dynamics  

E-Print Network (OSTI)

Partial dynamical symmetry describes a situation in which some eigenstates have a symmetry which the quantum Hamiltonian does not share. This property is shown to have a classical analogue in which some tori in phase space are associated with a symmetry which the classical Hamiltonian does not share. A local analysis in the vicinity of these special tori reveals a neighbourhood of phase space foliated by tori. This clarifies the suppression of classical chaos associated with partial dynamical symmetry. The results are used to divide the states of a mixed system into ``chaotic'' and ``regular'' classes.

A. Leviatan; N. D. Whelan

1996-08-24T23:59:59.000Z

280

Report on 1986 national survey of compensation paid scientists and engineers engaged in research and development activities  

Science Conference Proceedings (OSTI)

In November of 1966, the United States Department of Energy awarded a contract to the Columbus Division of Battelle to design a survey of compensation paid to scientific and engineering personnel engaged in research and development in the United States. This survey utilized the maturity or ''age-wage'' approach, under which salary data would be related to years since receipt or degree of chronological age. This document reports the results of the eighteenth annual survey, with a salary effective data of February 1, 1986.

Not Available

1987-01-01T23:59:59.000Z

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


281

Report on 1985 national survey of compensation paid scientists and engineers engaged in research and development activities  

Science Conference Proceedings (OSTI)

In November of 1966, the US DOE awarded a contract to the Columbus Division of Battelle to design a survey of compensation paid to scientific and engineering personnel engaged in research and development in the United States. The contract provided that such a survey would utilize the maturity or ''age-wage'' approach, under which salary data would be related to years since receipt of degree or chronological age. This document reports the results of the seventeenth annual survey, with a salary effective date of February 1, 1985.

Not Available

1985-11-01T23:59:59.000Z

282

Report on 1984 national survey of compensation paid scientists and engineers engaged in research and development activities  

Science Conference Proceedings (OSTI)

In November 1966, the United States Department of Energy awarded a contract to the Columbus Laboratories of Battelle to design a survey of compensation paid to scientific and engineering personnel engaged in research and development in the United States. The contract provided that such a survey would utilize the maturity of age-wage approach, under which salary data would be related to years since receipt of degree or chronological age. This document reports the results of the sixteenth annual survey, conducted in 1984.

Not Available

1984-06-01T23:59:59.000Z

283

Towards dynamic collaboration architectures  

Science Conference Proceedings (OSTI)

In this paper, we introduce the concept of dynamically changing between centralized, replicated, and hybrid collaboration architectures. It is implemented by providing users a function that dynamically changes the mapping between user-interface and program ... Keywords: ad-hoc collaboration, application sharing, collaboration architecture, latecomers, mobile collaboration

Goopeel Chung; Prasun Dewan

2004-11-01T23:59:59.000Z

284

Langevin molecular dynamics derived from Ehrenfest dynamics  

E-Print Network (OSTI)

Stochastic Langevin molecular dynamics for nuclei is derived from the Ehrenfest Hamiltonian system (also called quantum classical molecular dynamics) in a Kac-Zwanzig setting, with the initial data for the electrons stochastically perturbed from the ground state and the ratio, $M$, of nuclei and electron mass tending to infinity. The Ehrenfest nuclei dynamics is approximated by the Langevin dynamics with accuracy $o(M^{-1/2})$ on bounded time intervals and by $o(1)$ on unbounded time intervals, which makes the small $\\mathcal{O}(M^{-1/2})$ friction and $o(M^{-1/2})$ diffusion terms visible. The initial electron probability distribution is a Gibbs density at low temperture, derived by a stability and consistency argument: starting with any equilibrium measure of the Ehrenfest Hamiltonian system, the initial electron distribution is sampled from the equilibrium measure conditioned on the nuclei positions, which after long time leads to the nuclei positions in a Gibbs distribution (i.e. asymptotic stability); by consistency the original equilibrium measure is then a Gibbs measure.The diffusion and friction coefficients in the Langevin equation satisfy the Einstein's fluctuation-dissipation relation.

Anders Szepessy

2007-12-21T23:59:59.000Z

285

Solar Dynamics | Open Energy Information  

Open Energy Info (EERE)

Dynamics Jump to: navigation, search Name Solar Dynamics Place Ottumwa, Iowa Zip IA 52501 Sector Solar Product Solar Dynamics is a US-based solar powered attic roof vents...

286

Dynamic Behavior of Materials V  

Science Conference Proceedings (OSTI)

Dynamic Characterization of Cast and Wrought Uranium-Niobium Metals · Dynamic Deformation Response of High-Strength Ni-Containing Steels.

287

September 16, 2008; HSS/Union Working Group Meeting, Former Worker and Energy Compensation Programs, CAIRS Reporting, Central Worker Data Tracking - Information Package  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Former Worker/Energy Compensation DOE Former Worker/Energy Compensation CAIRS Central Worker Data Tracking September 16, 2008 September 16, 2008 CAIRS Central Worker Data Tracking September 16, 2008 n The information contained in this package is intended to be reference materials pertaining to the September 16, 2008 HSS/Union working group meeting. The informational pieces have been retrieved from the Internet or submitted by HSS and Union representatives for inclusion in the package, and does not necessarily reflect the view, support, or endorsement of all of the participating organizations. Agenda 08-19-08 Draft HSS/Union Working Group Meeting September 16, 2008 1:00 - 3:00 pm EST FORS 7E-069 SUBJECT: Former Worker/Energy Compensation Programs CAIRS Reporting Central Worker Data Tracking

288

Cirrus Outflow Dynamics  

Science Conference Proceedings (OSTI)

Cirrus outflow from deep convection are analyzed as dynamically and thermodynamically active systems. The initial outflow is considered as an analog to wake collapse, in which a neutrally buoyant flow intrusion is flattened and stretched by its ...

Douglas K. Lilly

1988-05-01T23:59:59.000Z

289

WORKSHOP ON NUCLEAR DYNAMICS  

E-Print Network (OSTI)

Complete Events in Medium-Energy Nuclear Collisions" C-Y.+ corrections. (A) The nuclear potential-energy problem isquantum dynamics in high-energy nuclear collisions. We have

Myers, W.D.

2010-01-01T23:59:59.000Z

290

Optical dynamic circuit services  

Science Conference Proceedings (OSTI)

IP service, leased-line service and POTS service have been the three long-standing communication service offerings of providers. Recently, both commercial and research-andeducation network providers have started offering optical dynamic circuit services. ...

Malathi Veeraraghavan; Mark Karol; George Clapp

2010-11-01T23:59:59.000Z

291

A Molecular Dynamics Simulation  

Science Conference Proceedings (OSTI)

Ab Initio Local Energy and Local Stress Calculations: Applications to Materials ... Computational Fluid Dynamics and Experimental Results for the Horizontal .... Films and Applications to a New Generation of Multifunctional Devices/Systems.

292

A Molecular Dynamics  

Science Conference Proceedings (OSTI)

A Tale of Two States and More: Modeling of New Generation of Lattice Stability from Zero ... Analysis of Nano Fluid Using CFD-A Hybrid Approach for Cooling Purpose ... Molecular Dynamics Simulations of Grain Boundary Free Energy and

293

A Molecular Dynamic Study  

Science Conference Proceedings (OSTI)

A Tale of Two States and More: Modeling of New Generation of Lattice Stability from Zero ... Analysis of Nano Fluid Using CFD-A Hybrid Approach for Cooling Purpose ... Molecular Dynamics Simulations of Grain Boundary Free Energy and

294

Frontal Geostrophic Dynamics  

Science Conference Proceedings (OSTI)

From the primitive equations simplified dynamics are derived that apply to frontal situations in which interface slopes are important. The formalism, which eliminates inertial motions, is not Unlike the derivation of the quasi-geostrophic ...

Benoit Cushman-Roisin

1986-01-01T23:59:59.000Z

295

C-Myc Induced Compensated Cardiac Hypertrophy Increases Free Fatty Acid Utilization for the Citric Acid Cycle  

SciTech Connect

The protooncogene C-Myc (Myc) regulates cardiac hypertrophy. Myc promotes compensated cardiac function, suggesting that the operative mechanisms differ from those leading to heart failure. Myc regulation of substrate metabolism is a reasonable target, as Myc alters metabolism in other tissues. We hypothesize that Myc-induced shifts in substrate utilization signal and promote compensated hypertrophy. We used cardiac specific Myc-inducible C57/BL6 male mice between 4-6 months old that develop hypertrophy with tamoxifen (tam). Isolated working hearts and 13Carbon (13C )-NMR were used to measure function and fractional contributions (Fc) to the citric acid cycle by using perfusate containing 13C-labeled free fatty acids, acetoacetate, lactate, unlabeled glucose and insulin. Studies were performed at pre-hypertrophy (3-days tam, 3dMyc), established hypertrophy (7-days tam, 7dMyc) or vehicle control (cont). Non-transgenic siblings (NTG) received 7-days tam or vehicle to assess drug effect. Hypertrophy was confirmed by echocardiograms and heart weights. Western blots were performed on key metabolic enzymes. Hypertrophy occurred in 7dMyc only. Cardiac function did not differ between groups. Tam alone did not affect substrate contribution in NTG. Substrate utilization was not significantly altered in 3dMyc versus cont. The free fatty acid FC was significantly greater in 7dMyc vs cont with decreased unlabeled Fc, which is predominately exogenous glucose. Free fatty acid flux to the citric acid cycle increased while lactate flux was diminished in 7dMyc compared to cont. Total protein levels of a panel of key metabolic enzymes were unchanged; however total protein O-GlcNAcylation was increased in 7dMyc. Substrate utilization changes did not precede hypertrophy; therefore they are not the primary signal for cardiac growth in this model. Free fatty acid utilization and oxidation increase at established hypertrophy. Understanding the mechanisms whereby this change maintained compensated function could provide useful information for developing metabolic therapies to treat heart failure. The molecular signaling for this metabolic change may occur through O-GlcNAcylation.

Olson, Aaron; Ledee, Dolena; Iwamoto, Kate; Kajimoto, Masaki; O'Kelly-Priddy, Colleen M.; Isern, Nancy G.; Portman, Michael A.

2013-02-01T23:59:59.000Z

296

Dynamic manipulability of multifingered grasping  

Science Conference Proceedings (OSTI)

In this paper, we extend the concept of dynamic manipulability to evaluate the dynamic property of multifingered grasping systems consisting of amultifingered hand and a grasped object, and propose a measure of dynamic manipulability of multifingered ... Keywords: dynamic manipulability, grasping, internal force, multifingered hand, omnidirectionality

Yasuyoshi Yokokohji; Jose San Martin; Masaki Fujiwara

2009-08-01T23:59:59.000Z

297

Report on 1982 national survey of compensation paid scientists and engineers engaged in research and development activities  

Science Conference Proceedings (OSTI)

In November of 1966, the United States Department of Energy awarded a contract to the Columbus Laboratories of Battelle to design a survey of compensation paid to scientific and engineering personnel engaged in research and development in the United States. The contract provided that such a survey would utilize the maturity or age-wage approach, under which salary data would be related to years since receipt of degree or chronological age. The document reports the results of the fifteenth annual survey, conducted in 1982. This survey was funded by the Department of Energy. The conduct of the survey has been approved by the Office of Management and Budget under the Federal Reports Act.

Not Available

1982-12-01T23:59:59.000Z

298

The Dynamical Discrete Web  

E-Print Network (OSTI)

The dynamical discrete web (DDW), introduced in recent work of Howitt and Warren, is a system of coalescing simple symmetric one-dimensional random walks which evolve in an extra continuous dynamical parameter s. The evolution is by independent updating of the underlying Bernoulli variables indexed by discrete space-time that define the discrete web at any fixed s. In this paper, we study the existence of exceptional (random) values of s where the paths of the web do not behave like usual random walks and the Hausdorff dimension of the set of such exceptional s. Our results are motivated by those about exceptional times for dynamical percolation in high dimension by H\\"aggstrom, Peres and Steif, and in dimension two by Schramm and Steif. The exceptional behavior of the walks in DDW is rather different from the situation for dynamical random walks of Benjamini, H\\"aggstrom, Peres and Steif. In particular, we prove that there are exceptional values of s for which the walk from the origin S^s(n) has limsup S^s(n)/\\sqrt n \\leq K with a nontrivial dependence of the Hausdorff dimension on K. We also discuss how these and other results extend to the dynamical Brownian web, a natural scaling limit of DDW. The scaling limit is the focus of a paper in preparation; it was studied by Howitt and Warren and is related to the Brownian net of Sun and Swart.

L. R. G. Fontes; C. M. Newman; K. Ravishankar; E. Schertzer

2007-04-20T23:59:59.000Z

299

Near-perfect-reconstruction low-complexity two-band IIR/FIR QMF banks with FIR phase-compensation filters  

Science Conference Proceedings (OSTI)

In this paper, we present a novel approach for the design of near-perfect-reconstruction mixed allpass-/FIR-based two-band quadrature-mirror filter banks. The proposed design method is carried out in the polyphase domain, where FIR filters are employed ... Keywords: FIR phase-compensation filter, allpass polyphase components, low-complexity QMF bank

Jörg Kliewer; Enisa Brka

2006-01-01T23:59:59.000Z

300

Surface Chemical Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

Surface Chemical Dynamics Surface Chemical Dynamics The goal of the Surface Chemical Dynamics Program is to elucidate the underlying physical processes that determine the products (selectivity) and yield (efficiency) of chemical transformations relevant to energy-related chemistry on catalytic and nanostructured surfaces. Achieving this end requires understanding the evolution of the reactant-molecule/surface complex as molecules adsorb, bonds dissociate, surface species diffuse, new bonds form and products desorb. The pathways and time scales of these processes are ultimately determined by a multidimensional potential energy surface that is a function of the geometric and electronic structures of the surface and the reactant, product, intermediate and transition-state molecular and atomic species.

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


301

MAX Fluid Dynamics facility  

NLE Websites -- All DOE Office Websites (Extended Search)

MAX Fluid Dynamics facility MAX Fluid Dynamics facility Capabilities Engineering Experimentation Reactor Safety Testing and Analysis Overview Nuclear Reactor Severe Accident Experiments MAX NSTF SNAKE Aerosol Experiments System Components Laser Applications Robots Applications Other Facilities Other Capabilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr MAX Fluid Dynamics facility Providing high resolution data for development of computational tools that model fluid flow and heat transfer within complex systems such as the core of a nuclear reactor. 1 2 3 4 5 Hot and cold air jets are mixed within a glass tank while laser-based anemometers and a high-speed infrared camera characterize fluid flow and heat transfer behavior. Click on image to view larger size image.

302

Substructured multibody molecular dynamics.  

SciTech Connect

We have enhanced our parallel molecular dynamics (MD) simulation software LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator, lammps.sandia.gov) to include many new features for accelerated simulation including articulated rigid body dynamics via coupling to the Rensselaer Polytechnic Institute code POEMS (Parallelizable Open-source Efficient Multibody Software). We use new features of the LAMMPS software package to investigate rhodopsin photoisomerization, and water model surface tension and capillary waves at the vapor-liquid interface. Finally, we motivate the recipes of MD for practitioners and researchers in numerical analysis and computational mechanics.

Grest, Gary Stephen; Stevens, Mark Jackson; Plimpton, Steven James; Woolf, Thomas B. (Johns Hopkins University, Baltimore, MD); Lehoucq, Richard B.; Crozier, Paul Stewart; Ismail, Ahmed E.; Mukherjee, Rudranarayan M. (Rensselaer Polytechnic Institute, Troy, NY); Draganescu, Andrei I.

2006-11-01T23:59:59.000Z

303

Introduction to Accelerated Molecular Dynamics  

SciTech Connect

Molecular Dynamics is the numerical solution of the equations of motion of a set of atoms, given an interatomic potential V and some boundary and initial conditions. Molecular Dynamics is the largest scale model that gives unbiased dynamics [x(t),p(t)] in full atomistic detail. Molecular Dynamics: is simple; is 'exact' for classical dynamics (with respect to a given V); can be used to compute any (atomistic) thermodynamical or dynamical properties; naturally handles complexity -- the system does the right thing at the right time. The physics derives only from the interatomic potential.

Perez, Danny [Los Alamos National Laboratory

2012-07-10T23:59:59.000Z

304

Introduction to Accelerated Molecular Dynamics  

SciTech Connect

Molecular Dynamics is the numerical solution of the equations of motion of a set of atoms, given an interatomic potential V and some boundary and initial conditions. Molecular Dynamics is the largest scale model that gives unbiased dynamics [x(t),p(t)] in full atomistic detail. Molecular Dynamics: is simple; is 'exact' for classical dynamics (with respect to a given V); can be used to compute any (atomistic) thermodynamical or dynamical properties; naturally handles complexity -- the system does the right thing at the right time. The physics derives only from the interatomic potential.

Perez, Danny [Los Alamos National Laboratory

2012-07-10T23:59:59.000Z

305

An Ocean Dynamical Thermostat  

Science Conference Proceedings (OSTI)

The role of ocean dynamics in the regulation of tropical sea surface temperatures (SSTs) is investigated using the Zebiak-Cane coupled occan-atmosphere model. The model is forced with a uniform heating, or cooling, varying between ±40 W m?2 into ...

Amy C. Clement; Richard Seager; Mark A. Cane; Stephen E. Zebiak

1996-09-01T23:59:59.000Z

306

Neutron Scattering and Dynamics  

Science Conference Proceedings (OSTI)

... "Molecule" H2O (N2)0.8(O2)0.2 Al Cd sigma_s barn 168.3 20.1 1.5 6.5 ... 31 Collective dynamics Animation courtesy of A. Zheludev (ORNL) ...

2009-09-15T23:59:59.000Z

307

Tropical Cyclone Eye Dynamics  

Science Conference Proceedings (OSTI)

A new perspective of the dynamics of a tropical cyclone eye is given in which eye subsidence and the adiabatic warming accompanying it are accounted for directly from the equations of motion. Subsidence is driven by an adverse, axial gradient of ...

R. K. Smith

1980-06-01T23:59:59.000Z

308

Bütschli dynamic droplet system  

Science Conference Proceedings (OSTI)

Dynamical oil-water systems such as droplets display lifelike properties and may lend themselves to chemical programming to perform useful work, specifically with respect to the built environment. We present Bütschli water-in-oil droplets as a model ... Keywords: Otto Bütschli, architecture, droplet, living technology, olive oil, origins of life

Rachel Armstrong; Martin Hanczyc

2013-10-01T23:59:59.000Z

309

BLOWER SYSTEM DYNAMICS  

SciTech Connect

An analysis is presented of the dynamics of a turboblower acting together with its connecting circuit. This is to be distinguished from the aero- thermodynamics involved in the design of the blower itself. The effect on system stability of blower and circuit characteristics is discussed. (auth)

Furgerson, W.T.

1958-04-16T23:59:59.000Z

310

Entanglement dynamics during decoherence  

Science Conference Proceedings (OSTI)

The evolution of the entanglement between oscillators that interact with the same environment displays highly non-trivial behavior in the long time regime. When the oscillators only interact through the environment, three dynamical phases were identified ... Keywords: 03.65.Yz, 03.67.Bg, 03.67.Mn, 05.40.Jc, Decoherence, Entanglement, Quantum Brownian Motion

Juan Pablo Paz; Augusto J. Roncaglia

2009-12-01T23:59:59.000Z

311

Compensation of Wave-Induced Motion and Force Phenomena for Ship-Based High Performance Robotic and Human Amplifying Systems  

SciTech Connect

The decrease in manpower and increase in material handling needs on many Naval vessels provides the motivation to explore the modeling and control of Naval robotic and robotic assistive devices. This report addresses the design, modeling, control and analysis of position and force controlled robotic systems operating on the deck of a moving ship. First we provide background information that quantifies the motion of the ship, both in terms of frequency and amplitude. We then formulate the motion of the ship in terms of homogeneous transforms. This transformation provides a link between the motion of the ship and the base of a manipulator. We model the kinematics of a manipulator as a serial extension of the ship motion. We then show how to use these transforms to formulate the kinetic and potential energy of a general, multi-degree of freedom manipulator moving on a ship. As a demonstration, we consider two examples: a one degree-of-freedom system experiencing three sea states operating in a plane to verify the methodology and a 3 degree of freedom system experiencing all six degrees of ship motion to illustrate the ease of computation and complexity of the solution. The first series of simulations explore the impact wave motion has on tracking performance of a position controlled robot. We provide a preliminary comparison between conventional linear control and Repetitive Learning Control (RLC) and show how fixed time delay RLC breaks down due to the varying nature wave disturbance frequency. Next, we explore the impact wave motion disturbances have on Human Amplification Technology (HAT). We begin with a description of the traditional HAT control methodology. Simulations show that the motion of the base of the robot, due to ship motion, generates disturbances forces reflected to the operator that significantly degrade the positioning accuracy and resolution at higher sea states. As with position-controlled manipulators, augmenting the control with a Repetitive Learning Controller has little impact due to the variable nature of the wave period. We then introduce a new approach to HAT control, Ship Motion Compensation for Force Control Systems (SMCFCS). This basic approach uses inclinometer and acceleration information from the base of the robot to compensate for ship motion disturbances. Results of the simulation study show over an order of magnitude decrease in the disturbance force reflected back to the operator and an order of magnitude increase in positioning accuracy and resolution.

Love, LJL

2003-09-24T23:59:59.000Z

312

NETL: Energy System Dynamics Focus Area  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy System Dynamics Onsite Research Energy System Dynamics Energy System Dynamics (ESD) is a focus area of the National Energy Technology Laboratory's Office of Research and...

313

Shared and Dynamic Libraries on Edison  

NLE Websites -- All DOE Office Websites (Extended Search)

Shared and Dynamic Libraries Shared and Dynamic Libraries The Edison system can support applications that use dynamic shared libraries (DSL) on the compute nodes. Some...

314

Dynamic Worldwide Solar Energy | Open Energy Information  

Open Energy Info (EERE)

Dynamic Worldwide Solar Energy Jump to: navigation, search Name Dynamic Worldwide Solar Energy Sector Solar Product US-based solar developer and financer. References Dynamic...

315

Cloud computing for dynamic systems  

Science Conference Proceedings (OSTI)

Cloud computing is a fast emerging model for enabling dynamic on-demand computing and IT-based services. It promotes dynamic properties and characteristics such as scalability, agility, flexibility, virtualised and distributed on-demand computing. However, ...

Khaled Sabry

2011-11-01T23:59:59.000Z

316

Dynamic Scaling of Manipulator Trajectories  

E-Print Network (OSTI)

A fundamental time-scaling property of manipulator dynamics has been identified that allows modification of movement speed without complete dynamics recalculation. By exploiting this property, it can be determined ...

Hollerbach, John M.

1983-01-01T23:59:59.000Z

317

Cell Dynamics and Process Control  

Science Conference Proceedings (OSTI)

ALUMINIUM REDUCTION TECHNOLOGY VII: Cell Dynamics And Process ... WITH RELEVANS TO POINT FEEDING ALUMINIUM CELL: Ove Kobbeltvedt, ...

318

Dynamic Behavior of Materials VI  

Science Conference Proceedings (OSTI)

Capturing Microstructural Features Related to Dynamic Damage Nucleation ... Structural Alumina during Low Velocity Impact Used in Protective Systems.

319

Interaction between economic dynamical systems  

Science Conference Proceedings (OSTI)

The paper considers economic dynamical systems, the state spaces being the Riemannian manifolds. Between two economic dynamical systems, global feedforward and the feedback interaction is defined and the connection between their linearization and prolongation ... Keywords: economic dynamical system, economic flow, feedback, feedforward, linearization, prolongation by derivation

Constantin Patrascoiu

2009-07-01T23:59:59.000Z

320

Equivalent Circuit Description of Non-compensated n-p Codoped TiO2 as Intermediate Band Solar Cells  

E-Print Network (OSTI)

The novel concept of non-compensated n-p codoping has made it possible to create tunable intermediate bands in the intrinsic band gap of TiO2, making the codoped TiO2 a promising material for developing intermediate band solar cells (IBSCs). Here we investigate the quantum efficiency of such IBSCs within two scenarios - with and without current extracted from the extended intermediate band. Using the ideal equivalent circuit model, we find that the maximum efficiency of 57% in the first scenario and 53% in the second are both much higher than the Shockley-Queisser limit from single gap solar cells. We also obtain various key quantities of the circuits, a useful step in realistic development of TiO2 based solar cells invoking device integration. These equivalent circuit results are also compared with the efficiencies obtained directly from consideration of electron transition between the energy bands, and both approaches reveal the intriguing existence of double peaks in the maximum quantum efficiency as a function of the relative location of IBs.

Tian-Li Feng; Guang-Wei Deng; Yi Xia; Feng-Cheng Wu; Ping Cui; Hai-Ping Lan; Zhen-Yu Zhang

2010-12-08T23:59:59.000Z

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


321

Accelerated Molecular Dynamics Methods  

NLE Websites -- All DOE Office Websites (Extended Search)

Dynamics Methods Dynamics Methods for Infrequent Events Arthur F. Voter Theoretical Division Los Alamos National Laboratory Los Alamos, New Mexico U.S. Department of Energy Theory Focus Session on Hydrogen Storage Materials Crystal City, VA May 18, 2006 Los Alamos Acknowledgments Blas P. Uberuaga (LANL, MST-8) Francesco Montalenti (U. Milano-Bicocca) Graeme Henkelman (U. Texas at Austin) Timothy C. Germann (LANL, X-7) James A. Sprague (NRL) Mads Sorensen (Novo Nordisk A/S, Copenhagen) Sriram Swaminarayan (LANL, MST-8) Steve Stuart (Clemson) David Sholl (Carnegie Mellon) John Hamilton (Sandia) Wolfgang Windl (Ohio State) Roger Smith (U. Loughborough) Robin Grimes (Imperial College) Kurt Sickafus (LANL, MST-8) Jacques Amar (U. Toledo) DOE Office of Basic Energy Sciences Motorola Intel Los Alamos Outline

322

Critical dynamics and decoherence  

SciTech Connect

We study dynamics of decoherence in a generic model where the environment is driven and undergoes a quantum phase transition. We model the environment by the Ising chain in the transverse field, and assume that the decohering system is a central spin-1/2. We found that when the environment is quenched slowly through the critical point, the decoherence factor of the central spin undergoes rapid decay that encodes the critical exponents of the environment. We also found that decoherence in a non-equilibrated, kink-contaminated, environment can be stronger than in a vacuum one. We derived a remarkably simple analytical expression that describes post-transition decoherence and predicts periodicities involving all system parameters. This research connects the fields of decoherence, quantum phase transitions, and Kibble-Zurek non-equilibrium dynamics.

Damski, Bogdan [Los Alamos National Laboratory; Quan, Haitao T [Los Alamos National Laboratory; Zurek, Wojciech H [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

323

Social Dynamics of Science  

E-Print Network (OSTI)

The birth and decline of disciplines are critical to science and society. However, no quantitative model to date allows us to validate competing theories of whether the emergence of scientific disciplines drives or follows the formation of social communities of scholars. Here we propose an agent-based model based on a \\emph{social dynamics of science,} in which the evolution of disciplines is guided mainly by the social interactions among scientists. We find that such a social theory can account for a number of stylized facts about the relationships between disciplines, authors, and publications. These results provide strong quantitative support for the key role of social interactions in shaping the dynamics of science. A "science of science" must gauge the role of exogenous events, such as scientific discoveries and technological advances, against this purely social baseline.

Sun, Xiaoling; Milojevi?, Staša; Flammini, Alessandro; Menczer, Filippo

2013-01-01T23:59:59.000Z

324

Dynamic radioactive particle source  

SciTech Connect

A method and apparatus for providing a timed, synchronized dynamic alpha or beta particle source for testing the response of continuous air monitors (CAMs) for airborne alpha or beta emitters is provided. The method includes providing a radioactive source; placing the radioactive source inside the detection volume of a CAM; and introducing an alpha or beta-emitting isotope while the CAM is in a normal functioning mode.

Moore, Murray E.; Gauss, Adam Benjamin; Justus, Alan Lawrence

2012-06-26T23:59:59.000Z

325

Meeting Residential Ventilation Standards Through Dynamic Control...  

NLE Websites -- All DOE Office Websites (Extended Search)

Meeting Residential Ventilation Standards Through Dynamic Control of Ventilation Systems Title Meeting Residential Ventilation Standards Through Dynamic Control of Ventilation...

326

September 16, 2008; HSS/Union Working Group Meeting, Former Worker and Energy Compensation Programs, CAIRS Reporting, Central Worker Data Tracking Â… Meeting Summary  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

7 10-10-08 Draft 7 10-10-08 Draft HSS/Union Meeting To Address Former Worker and Energy Employee Occupational Illness Compensation Programs, CAIRS Reporting, and Central Worker Data Tracking September 16, 2008 Integrated Executive Summary and Final Action List Background: HSS and the labor unions who participated in the initial 2007 HSS Focus Group meetings agreed to a path forward in which various unions combined to form core working groups to address union identified health and safety issues by topical area. The following is an overview of actions/activities identified in the September 16 HSS/Union meeting to address Former Worker and the Energy Employee Occupational Illness Compensation Programs, CAIRS Reporting, and Central Worker Data Tracking interests and

327

Self-consistent modeling of the dynamic evolution of magnetic island growth in the presence of stabilizing ECCD  

E-Print Network (OSTI)

The most promising technique for the control of neoclassical tearing modes in tokamak experiments is the compensation of the missing bootstrap current with electron-cyclotron current drive. In this frame, the dynamics of magnetic islands has been studied extensively in terms of the modified Rutherford equation, including the presence of current drive, either analytically described or computed by numerical methods. In this article, a self-consistent model for the dynamic evolution of the magnetic island and the driven current is derived, which takes into account the island's magnetic topology and its effect on the current drive. The model combines the modified Rutherford equation with a ray-tracing approach to electron-cyclotron wave propagation and absorption. Numerical results exhibit a decrease in the time required for complete stabilization with respect to the conventional computation (not taking into account the island geometry), which increases with increasing initial island size and radial misalignment ...

Chatziantonaki, Ioanna; Isliker, Heinz; Vlahos, Loukas

2013-01-01T23:59:59.000Z

328

Fourteenth Annual National Survey of Compensation Paid to Scientists and Engineers Engaged in Research and Development Activities in the United States. Phase XV. Final report  

Science Conference Proceedings (OSTI)

This report summarizes the conduct of the Fourteenth Annual National Survey of Compensation Paid to Scientists and Engineers Engaged in Research and Development Activities. This survey utilizes the survey design developed for the first annual survey, taking into account the DOE acceptances and modification of the recommendations contained in Battelle's Columbus Laboratories final report of the previous surveys. The contract scope of work specified that the survey should obtain information concerning compensation and compensation-related characteristics of both nondegreed and degreed scientists and engineers engaged in research and development. Information was to be obtained concerning both the employees and employers. The survey variables for which information was to be obtained were specified. As before, the universe specifications were to encompass industrial establishments, educational institutions, nonprofit research institutes, federal laboratories and federally funded research and development centers. The sampling plan was to be the same as for the previous surveys. The sample size was to be maintained at approximately 300 to 325 establishments. The sampling plan incorporated stratification and clustering based upon: (1) establishment size in terms of numbers of scientists and engineers employed; and (2) size of the Standard Metropolitan Statistical Area (SMSA) in terms of scientists and engineers in the area. Trend analyses, showing changes in salary levels over a five-year period, were to be prepared. Tabulated results of the survey are presented.

Spurgeon, M.; Evans, P.; Beatty, G.H.; Arnold, L.

1981-12-31T23:59:59.000Z

329

Phase XIV: the thirteenth annual national survey of compensation paid to scientists and engineers engaged in research and development activities in the United States  

Science Conference Proceedings (OSTI)

The Thirteenth Annual National Survey of Compensation Paid to Scientists and Engineers Engaged in Research and Development in 1980 is summarized. The contract scope of work specified that the survey should obtain information concerning compensation and compensation-related characteristics of both nondegreed and degreed scientists and engineers engaged in research and development. Information was to be obtained concerning both the employees and employers. The survey variables for which information was to be obtained were specified. As before, the universe specifications were to encompass industrial establishments, educational institutions, nonprofit research institutes, federal laboratories, and federally funded research and development centers. The sampling plan was to be the same as for the previous surveys. The sample size was to be maintained at approximately 300 to 325 establishments. The sampling plan incorporated stratification and clustering based upon (a) establishment size in terms of numbers of scientists and engineers employed and (b) size of the Standard Metropolitan Statistical Area (SMSA) in terms of scientists and engineers in the area. Trend analyses, showing changes in salary levels over a five-year period, were to be prepared.

Newborg, J.; Gabel, J.; Beatty, G.H.; Spurgeon, M.; Newman, S.

1980-12-24T23:59:59.000Z

330

Definition: Dynamic Interchange Schedule Or Dynamic Schedule | Open Energy  

Open Energy Info (EERE)

Schedule Or Dynamic Schedule Schedule Or Dynamic Schedule Jump to: navigation, search Dictionary.png Dynamic Interchange Schedule Or Dynamic Schedule A telemetered reading or value that is updated in real time and used as a schedule in the AGC/ACE equation and the integrated value of which is treated as a schedule for interchange accounting purposes. Commonly used for scheduling jointly owned generation to or from another Balancing Authority Area.[1] Related Terms balancing authority, balancing authority area, smart grid References ↑ Glossary of Terms Used in Reliability Standards An in LikeLike UnlikeLike You like this.Sign Up to see what your friends like. line Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Dynamic_Interchange_Schedule_Or_Dynamic_Schedule&oldid=502492

331

Heat transfer dynamics  

Science Conference Proceedings (OSTI)

As heat transfer technology increases in complexity, it becomes more difficult for those without thermal dynamics engineering training to choose between competitive heat transfer systems offered to meet their drying requirements. A step back to the basics of heat transfer can help professional managers and papermakers make informed decisions on alternative equipment and methods. The primary forms of heat and mass transfer are reviewed with emphasis on the basics, so a practical understanding of each is gained. Finally, the principles and benefits of generating infrared energy by combusting a gaseous hydrocarbon fuel are explained.

Smith, T.M. (Marsden, Inc., Pennsauken, NJ (United States))

1994-08-01T23:59:59.000Z

332

Pay and Compensation  

Science Conference Proceedings (OSTI)

... There is no maximum percentage, except that the new salary may not exceed the ceiling of the new band. Supervisory Differentials. ...

2011-09-22T23:59:59.000Z

333

Compensation | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

are authorized to waive the bi-weekly pay limitation for employees engaged in emergency response activities that include, but are not limited to, disaster relief assistance,...

334

Jitter compensation circuit  

DOE Patents (OSTI)

The instantaneous V.sub.co signal on a charging capacitor is sampled and the charge voltage on capacitor C.sub.o is captured just prior to its discharge into the first stage of magnetic modulator. The captured signal is applied to an averaging circuit with a long time constant and to the positive input terminal of a differential amplifier. The averaged V.sub. co signal is split between a gain stage (G=0.975) and a feedback stage that determines the slope of the voltage ramp applied to the high speed comparator. The 97.5% portion of the averaged V.sub.co signal is applied to the negative input of a differential amplifier gain stage (G=10). The differential amplifier produces an error signal by subtracting 97.5% of the averaged V.sub.co signal from the instantaneous value of sampled V.sub.co signal and multiplying the difference by ten. The resulting error signal is applied to the positive input of a high speed comparator. The error signal is then compared to a voltage ramp that is proportional to the averaged V.sub.co values squared divided by the total volt-second product of the magnetic compression circuit.

Sullivan, James S. (Livermore, CA); Ball, Don G. (Livermore, CA)

1997-01-01T23:59:59.000Z

335

Jitter compensation circuit  

DOE Patents (OSTI)

The instantaneous V{sub co} signal on a charging capacitor is sampled and the charge voltage on capacitor C{sub o} is captured just prior to its discharge into the first stage of magnetic modulator. The captured signal is applied to an averaging circuit with a long time constant and to the positive input terminal of a differential amplifier. The averaged V{sub co} signal is split between a gain stage (G = 0.975) and a feedback stage that determines the slope of the voltage ramp applied to the high speed comparator. The 97.5% portion of the averaged V{sub co} signal is applied to the negative input of a differential amplifier gain stage (G = 10). The differential amplifier produces an error signal by subtracting 97.5% of the averaged V{sub co} signal from the instantaneous value of sampled V{sub co} signal and multiplying the difference by ten. The resulting error signal is applied to the positive input of a high speed comparator. The error signal is then compared to a voltage ramp that is proportional to the averaged V{sub co} values squared divided by the total volt-second product of the magnetic compression circuit. 11 figs.

Sullivan, J.S.; Ball, D.G.

1997-09-09T23:59:59.000Z

336

Gas-Phase Molecular Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas-Phase Molecular Dynamics Gas-Phase Molecular Dynamics The Gas-Phase Molecular Dynamics Group is dedicated to developing and applying spectroscopic and theoretical tools to challenging problems in chemical physics related to reactivity, structure, dynamics and kinetics of transient species. Recent theoretical work has included advances in exact variational solution of vibrational quantum dynamics, suitable for up to five atoms in systems where large amplitude motion or multiple strongly coupled modes make simpler approximations inadequate. Other theoretical work, illustrated below, applied direct dynamics, quantum force trajectory calculations to investigate a series of reactions of the HOCO radical. The potential energy surface for the OH + CO/ H + CO2 reaction, showing two barriers (TS1 and TS2) and the deep HOCO well along the minimum energy pathway. The inset figure shows the experimental and calculated reactivity of HOCO with selected collision partners. See J.S. Francisco, J.T. Muckerman and H.-G. Yu, "HOCO radical chemistry,"

337

Dynamic Chirality in Nuclei  

SciTech Connect

The possible chiral interpretation of twin bands in odd-odd nuclei was investigated in the Interacting Boson Fermion-Fermion Model. The analysis of the wave functions has shown that the possibility for angular momenta of the valence proton, neutron and core to find themselves in the favorable, almost orthogonal geometry is present, but not dominant. Such behaviour is found to be similar in nuclei where both the level energies and the electromagnetic decay properties display the chiral pattern, as well as in those where only the energies of the corresponding levels in the twin bands are close together. The difference in the structure of the two types of chiral candidates nuclei can be attributed to different beta and gamma fluctuations, induced by the exchange boson-fermion interaction of the Interacting Boson Fermion-Fermion Model. In both cases the chirality is weak and dynamic. The existence of doublets of bands in {sup 134}Pr can be attributed to dynamic chirality dominated by shape fluctuations.

Tonev, D. [Institute for Nuclear Research and Nuclear Energy, BAS, 1784 Sofia (Bulgaria); INFN, Laboratori Nazionali di Legnaro, 35020 Legnaro (Italy); Angelis, G. de [INFN, Laboratori Nazionali di Legnaro, 35020 Legnaro (Italy); Brant, S. [Department of Physics, Faculty of Science, University of Zagreb, 10000 Zagreb (Croatia); Petkov, P. [Institute for Nuclear Research and Nuclear Energy, BAS, 1784 Sofia (Bulgaria); Ventura, A. [ENEA, 40129 Bologna and INFN, Sezione di Bologna (Italy)

2009-08-26T23:59:59.000Z

338

Commissioning of a beta* knob for dynamic IR correction at RHIC  

Science Conference Proceedings (OSTI)

In addition to the recent optics correction technique demonstrated at CERN and applied at RHIC, it is important to have a separate tool to control the value of the beta functions at the collision point ({beta}*). This becomes even more relevant when trying to reach high level of integrated luminosity while dealing with emittance blow-up over the length of a store, or taking advantage of compensation processes like stochastic cooling. Algorithms have been developed to allow modifying independently the beta function in each plane for each beam without significant increase in beam losses. The following reviews the principle of such algorithms and their experimental implementation as a dynamic {beta}-squeeze procedure.

Robert-Demolaize G.; Marusic, A.; Tepikian, S.; White, S.

2012-05-20T23:59:59.000Z

339

Particle Dynamics And Emergent Gravity  

E-Print Network (OSTI)

The emergent gravity proposal is examined within the framework of noncommutative QED/gravity correspondence from particle dynamics point of view.

Amir H. Fatollahi

2008-05-08T23:59:59.000Z

340

Nuclear Matter and Nuclear Dynamics  

E-Print Network (OSTI)

Highlights on the recent research activity, carried out by the Italian Community involved in the "Nuclear Matter and Nuclear Dynamics" field, will be presented.

M Colonna

2009-02-26T23:59:59.000Z

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


341

and Industry Dynamics  

E-Print Network (OSTI)

We assess the long-run dynamic implications of market-based regulation of carbon dioxide emissions in the US Portland cement industry. We consider several alternative policy designs, including mechanisms that use production subsidies to partially offset compliance costs and border tax adjustments to penalize emissions associated with foreign imports. Our results highlight two general countervailing market distortions. First, following Buchanan (1969), reductions in product market surplus and allocative inefficiencies due to market power in the domestic cement market counteract the social benefits of carbon abatement. Second, tradeexposure to unregulated foreign competitors leads to emissions “leakage ” which offsets domestic emissions reductions. Taken together, these forces result in social welfare losses under policy regimes that fully internalize the emissions externality. In contrast, market-based policies that incorporate design features to mitigate the exercise of market power and emissions leakage can deliver welfare gains. 1

Meredith Fowlie; Mar Reguant; Stephen P. Ryan; Meredith Fowlie; Mar Reguant; Stephen P. Ryan

2013-01-01T23:59:59.000Z

342

Dynamic Radiographic Imaging  

Science Conference Proceedings (OSTI)

A radiographic system recently developed by American and Russian collaborators is designed to capture multiple images of a dynamic event lasting less than 10 microseconds. Various optical and electro-optical components were considered and their performance compared. The final system employed a solid crystal of lutetium oxyorthosilicate doped with cerium (LSO:Ce or LSO) for X-ray-to-light conversion with a coherent fiber optic bundle to relay the scintillator image to a streak camera with charge coupled device (CCD) readout. Resolution and sensitivity studies were carried out for this system on two different sources of X-rays: a 20 MeV microtron and a 70 MeV betatron.

Volkov, A.; Turley, D.; Veeser, L.; Lukyanov, N.; Yegorov, N.; Baker, S.A.; Mirenko, V.; Lewis, W.; Kuropatkin, Y.

1999-06-01T23:59:59.000Z

343

Dynamic Vnodes - design and implementation  

Science Conference Proceedings (OSTI)

Dynamic vnodes make the UNIX kernel responsive to a varying demand for vnodes, without a need to rebuild the kernel. It also optimizes the usage of memory by deallocating excess vnodes. This paper describes the design and implementation of dynamic vnodes ...

Aju John

1995-01-01T23:59:59.000Z

344

Dynamic model for hydraulic dissipators  

Science Conference Proceedings (OSTI)

The authors propose a mathematical model of a hydraulic link with energy dissipation, the device working reversibly to the alternative traction and compression movement. The dynamic behavior of the energy hydraulic dissipater depends on the instantaneous ... Keywords: dissipater's control, dynamic behavior, hydraulic dissipater, mathematical model

Adrian S. Axinti; Gavril Axinti

2009-03-01T23:59:59.000Z

345

Fluctuations in molecular dynamics simulations  

Science Conference Proceedings (OSTI)

Statistical fluctuations of a system about its equilibrium state, monitored in a molecular dynamics simulation, are an effective means of computing the thermodynamic and kinetic properties of interfaces in metals and alloys. In this work, three applications ... Keywords: Fluctuations, Grain boundaries, Interfaces, Interfacial free energy, Mobility, Molecular dynamics

J. J. Hoyt; Z. T. Trautt; M. Upmanyu

2010-03-01T23:59:59.000Z

346

Dynamic spectrum management using GA  

Science Conference Proceedings (OSTI)

Thousands of equipments of the wireless network and the mobile devices are widely used and the demand of dynamic spectrum resources is significantly growing. How to maximize the social utility in modern technique becomes an important issue. In this paper, ... Keywords: Shannon utility, background interference, crosstalk, dynamic spectrum management, genetic algorithm

Ping-Liang Chen; Chia-Liang Peng; Shin-Jia Chen; Yu-Cheng Lin

2011-12-01T23:59:59.000Z

347

Periodicity estimation of Dynamic Textures  

Science Conference Proceedings (OSTI)

Dynamic Textures (DTs) are image sequences of natural events like fire, smoke, water etc., that possesses regular motion patterns. Periodicity is a widely used tool to analyse regular structures of periodic one dimensional signals as well as two dimensional ... Keywords: co-occurrence matrix, dynamic textures, image sequences, image texture analysis, motion patterns, natural events, periodicity estimation, temporal textures

Khalid Zaman Bijon; Ahmed Hasan; Ashfaqur Rahman; Manzur Murshed

2008-03-01T23:59:59.000Z

348

Dynamics of shared capitalism policies in a startup company by Joe C. Hsueh.  

E-Print Network (OSTI)

Shared capitalism is a diverse set of compensation practices through which worker pay, or wealth, depends on the performance of the firm or work group; compensation practices include employee ownership, stock options, and ...

Hsueh, Joe C. (Joe Chiao-Jen)

2011-01-01T23:59:59.000Z

349

September 16, 2008; HSS/Union Working Group Meeting, Former Worker and Energy Compensation Programs, CAIRS Reporting, Central Worker Data Tracking - Agenda  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Working Group Meeting Working Group Meeting September 16, 2008 1:00 - 3:00 pm EST FORS 7E-069 SUBJECT: Former Worker/Energy Compensation Programs CAIRS Reporting Central Worker Data Tracking Meeting Facilitation: Building &Construction Trades Department Center for Construction Research &Training [Pete Stafford, Patricia Quinn] Agenda I. Former Worker Screening: Outreach, Improved Facilitation, Collective efforts and issues 1. Screening Programs (historical and future needs) - OccMed/contractor interaction - Program improvements [i.e., aspects of latent chronic illness] - Subcontractor population - Improved program management -- Standards for preventing future cases [Proper screening/tracking] -- Address contractor; production vs. construction; Complex wide portability

350

A Generic Dynamic Emulator  

E-Print Network (OSTI)

In applied sciences, we often deal with deterministic simulation models that are too slow for simulation-intensive tasks such as calibration or real-time control. In this paper, an emulator for a generic dynamic model, given by a system of ordinary non-linear differential equations, is developed. The non-linear differential equations are linearized and Gaussian white noise is added to account for the non-linearities. The resulting linear stochastic system is conditioned on a set of solutions of the non-linear equations that have been calculated prior to the emulation. A path-integral approach is used to derive the Gaussian distribution of the emulated solution. The solution reveals that most of the computational burden can be shifted to the conditioning phase of the emulator and the complexity of the actual emulation step only scales like $\\mathcal O(Nnm^2)$, where $N$ is the number of time-points at which the solution is to be emulated, $n$ the number of solutions the emulator is conditioned on and $m$ the n...

Albert, Carlo

2011-01-01T23:59:59.000Z

351

Dynamic Fault Detection Chassis  

Science Conference Proceedings (OSTI)

Abstract The high frequency switching megawatt-class High Voltage Converter Modulator (HVCM) developed by Los Alamos National Laboratory for the Oak Ridge National Laboratory's Spallation Neutron Source (SNS) is now in operation. One of the major problems with the modulator systems is shoot-thru conditions that can occur in a IGBTs H-bridge topology resulting in large fault currents and device failure in a few microseconds. The Dynamic Fault Detection Chassis (DFDC) is a fault monitoring system; it monitors transformer flux saturation using a window comparator and dV/dt events on the cathode voltage caused by any abnormality such as capacitor breakdown, transformer primary turns shorts, or dielectric breakdown between the transformer primary and secondary. If faults are detected, the DFDC will inhibit the IGBT gate drives and shut the system down, significantly reducing the possibility of a shoot-thru condition or other equipment damaging events. In this paper, we will present system integration considerations, performance characteristics of the DFDC, and discuss its ability to significantly reduce costly down time for the entire facility.

Mize, Jeffery J [ORNL

2007-01-01T23:59:59.000Z

352

ICFA Beam Dynamics Newsletter  

SciTech Connect

The Collider-Accelerator Department at Brookhaven National Laboratory is building a high-brightness 500 mA capable Energy Recovery Linac (ERL) as one of its main R&D thrusts towards eRHIC, the polarized electron - hadron collider as an upgrade of the operating RHIC facility. The ERL is in final assembly stages, with injection commisioning starting in October 2012. The objective of this ERL is to serve as a platform for R&D into high current ERL, in particular issues of halo generation and control, Higher-Order Mode (HOM) issues, coherent emissions for the beam and high-brightness, high-power beam generation and preservation. The R&D ERL features a superconducting laser-photocathode RF gun with a high quantum efficiency photoccathode served with a load-lock cathode delivery system, a highly damped 5-cell accelerating cavity, a highly flexible single-pass loop and a comprehensive system of beam instrumentation. In this ICFA Beam Dynamics Newsletter article we will describe the ERL in a degree of detail that is not usually found in regular publications. We will discuss the various systems of the ERL, following the electrons from the photocathode to the beam dump, cover the control system, machine protection etc and summarize with the status of the ERL systems.

Ben-Zvi I.; Kuczewski A.; Altinbas, Z.; Beavis, D.; Belomestnykh,; Dai, J. et al

2012-07-01T23:59:59.000Z

353

Discrete-Time Poles and Dynamics of Discontinuous Mode Boost and Buck Converters Under Various Control Schemes  

E-Print Network (OSTI)

Nonlinear systems, such as switching DC-DC boost or buck converters, have rich dynamics. A simple one-dimensional discrete-time model is used to analyze the boost or buck converter in discontinuous conduction mode. Seven different control schemes (open-loop power stage, voltage mode control, current mode control, constant power load, constant current load, constant-on-time control, and boundary conduction mode) are analyzed systematically. The linearized dynamics is obtained simply by taking partial derivatives with respect to dynamic variables. In the discrete-time model, there is only a single pole and no zero. The single closed-loop pole is a linear combination of three terms: the open-loop pole, a term due to the control scheme, and a term due to the non-resistive load. Even with a single pole, the phase response of the discrete-time model can go beyond -90 degrees as in the two-pole average models. In the boost converter with a resistive load under current mode control, adding the compensating ramp has no effect on the pole location. Increasing the ramp slope decreases the DC gain of control-to-output transfer function and increases the audio-susceptibility. Similar analysis is applied to the buck converter with a non-resistive load or variable switching frequency. The derived dynamics agrees closely with the exact switching model and the past research results.

Chung-Chieh Fang

2012-11-19T23:59:59.000Z

354

Fermionic Molecular Dynamics for nuclear dynamics and thermodynamics  

E-Print Network (OSTI)

A new Fermionic Molecular Dynamics (FMD) model based on a Skyrme functional is proposed in this paper. After introducing the basic formalism, some first applications to nuclear structure and nuclear thermodynamics are presented

K. H. O. Hasnaoui; Ph. Chomaz; F. Gulminelli

2008-12-02T23:59:59.000Z

355

Complex Crystallization Dynamics in Amorphous Germanium ...  

Science Conference Proceedings (OSTI)

We used dynamic transmission electron microscopy [2] to study in situ this fast dynamics ... of Magnetism in Multiferroic Heterostructures and Low-power Devices ...

356

16.07 Dynamics, Fall 2004  

E-Print Network (OSTI)

Dynamics starts with fundamentals of Newtonian mechanics. Further topics include kinematics, particle dynamics, motion relative to accelerated reference frames, work and energy, impulse and momentum, systems of particles ...

Peraire, Jaume

357

Molecular dynamics simulations and drug discovery  

E-Print Network (OSTI)

JE: On the determination of molecular fields. II. From thescalability for parallel molecular dynamics. J Comput PhysKale L, Schulten K: Scalable molecular dynamics with NAMD. J

Durrant, Jacob D; McCammon, J Andrew

2011-01-01T23:59:59.000Z

358

Dynamic stall on wind turbine blades  

DOE Green Energy (OSTI)

Dynamic loads must be predicted accurately in order to estimate the fatigue life of wind turbines operating in turbulent environments. Dynamic stall contributes to increased dynamic loads during normal operation of all types of horizontal-axis wind turbine (HAWTs). This report illustrates how dynamic stall varies throughout the blade span of a 10 m HAWT during yawed and unyawed operating conditions. Lift, drag, and pitching moment coefficients during dynamics stall are discussed. Resulting dynamic loads are presented, and the effects of dynamic stall on yaw loads are demonstrated using a yaw loads dynamic analysis (YAWDYN). 12 refs., 22 figs., 1 tab.

Butterfield, C.P.; Simms, D.; Scott, G. [National Renewable Energy Lab., Golden, CO (United States)] [National Renewable Energy Lab., Golden, CO (United States); Hansen, A.C. [Utah Univ., Salt Lake City, UT (United States)] [Utah Univ., Salt Lake City, UT (United States)

1991-12-01T23:59:59.000Z

359

Model of rotary-actuated flexible beam with notch filter vibration suppression controller and torque feedforward load compensation controller  

Science Conference Proceedings (OSTI)

This paper describes ORNL`s development of an environment for the simulation of robotic manipulators. Simulation includes the modeling of kinematics, dynamics, sensors, actuators, control systems, operators, and environments. Models will be used for manipulator design, proposal evaluation, control system design and analysis, graphical preview of proposed motions, safety system development, and training. Of particular interest is the development of models for robotic manipulators having at least one flexible link. As a first application, models have been developed for the Pacific Northwest Laboratory`s Flexible Beam Test Bed (PNL FBTB), which is a 1-Degree-of-Freedom, flexible arm with a hydraulic base actuator. ORNL transferred control algorithms developed for the PNL FBTB to controlling IGRIP models. A robust notch filter is running in IGRIP controlling a full dynamics model of the PNL test bed. Model results provide a reasonable match to the experimental results (quantitative results are being determined) and can run on ORNL`s Onyx machine in approximately realtime. The flexible beam is modeled as six rigid sections with torsional springs between each segment. The spring constants were adjusted to match the physical response of the flexible beam model to the experimental results. The controller is able to improve performance on the model similar to the improvement seen on the experimental system. Some differences are apparent, most notably because the IGRIP model presently uses a different trajectory planner than the one used by ORNL on the PNL test bed. In the future, the trajectory planner will be modified so that the experiments and models are the same. The successful completion of this work provides the ability to link C code with IGRIP, thus allowing controllers to be developed, tested, and tuned in simulation and then ported directly to hardware systems using the C language.

Bills, K.C.; Kress, R.L.; Kwon, D.S. [Oak Ridge National Lab., TN (United States); Baker, C.P. [Battelle, Richland, WA (United States). Dept. of Automation and Measurement Sciences

1994-12-31T23:59:59.000Z

360

The power of dynamic pricing  

SciTech Connect

Using data from a generic California utility, it can be shown that it is feasible to develop dynamic pricing rates for all customer classes. These rates have the potential to reduce system peak demands from 1 to 9 percent. (author)

Faruqui, Ahmad; Hledik, Ryan; Tsoukalis, John

2009-04-15T23:59:59.000Z

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


361

Dynamical Predictability of Monthly Means  

Science Conference Proceedings (OSTI)

We have attempted to determine the theoretical upper limit of dynamical predictability of monthly means for prescribed nonfluctuating external forcings. We have extended the concept of “classical” predictability, which primarily refers to the ...

J. Shukla

1981-12-01T23:59:59.000Z

362

LANL | Physics | Dynamic Plutonium Experiments  

NLE Websites -- All DOE Office Websites (Extended Search)

Dynamic plutonium experiments Dynamic plutonium experiments Since the end of nuclear testing the nation has had to rely on sophisticated computer models to ensure the safety and reliability of the nuclear weapons stockpile. This program is known as science-based stockpile stewardship. Despite possessing the world's fastest computers and most advanced modeling capability, the behavior of materials under dynamic loads that occur in a nuclear weapon are difficult to accurately model. The Dynamic Plutonium experimental program carries out experiments at the Nevada National Security Site on plutonium driven by high explosives. These experiments are needed to measure and understand the behavior of plutonium under extreme conditions. Physics Division has unique capabilities in high-speed x-ray imaging and velocimetry (measuring the

363

Stochastic Dynamics of Baroclinic Waves  

Science Conference Proceedings (OSTI)

The maintenance of variance and attendant heat flux in linear, forced, dissipative baroclinic shear flows subject to stochastic excitation is examined. The baroclinic problem is intrinsically nonnormal and its stochastic dynamics is found to ...

Brian F. Farrell; Petros J. Ioannou

1993-12-01T23:59:59.000Z

364

Essays on dynamic sales mechanisms  

E-Print Network (OSTI)

This thesis is a collection of three essays on dynamic sales mechanisms. The first chapter analyzes the Name Your Own Price (NYOP) mechanism adopted by Priceline.com. Priceline.com, a website helping travelers obtain ...

Chen, Chia-Hui, Ph. D. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

365

Dynamical Processes of Block Evolution  

Science Conference Proceedings (OSTI)

The dynamical processes associated with block evolution are investigated by analyzing a GCM run, forced with perpetual January conditions. The core of the analysis lies on the temporal evolution of the blocks and on vorticity budget terms ...

Benjamin A. Cash; Sukyoung Lee

2000-10-01T23:59:59.000Z

366

Ensemble Dynamics and Bred Vectors  

Science Conference Proceedings (OSTI)

The new concept of an ensemble bred vector (EBV) algorithm is introduced to assess the sensitivity of model outputs to changes in initial conditions for weather forecasting. The new algorithm is based on collective dynamics in essential ways. As ...

Nusret Balci; Anna L. Mazzucato; Juan M. Restrepo; George R. Sell

2012-07-01T23:59:59.000Z

367

Dynamic Pricing: A learning Approach  

E-Print Network (OSTI)

We present an optimization approach for jointly learning the demand as a functionof price, and dynamically setting prices of products in an oligopoly environment in order to maximize expected revenue. The models we consider ...

Bertsimas, Dimitris J.

368

Dynamic Mercury Cycling Model Upgrade  

Science Conference Proceedings (OSTI)

This technical update describes the status of activities to upgrade the Dynamic Mercury Cycling Model (D-MCM), an EPRI simulation model that predicts mercury cycling and bioaccumulation in lakes.

2008-12-17T23:59:59.000Z

369

Adding dynamic types to C  

Science Conference Proceedings (OSTI)

Developers using statically typed languages such as C? and Java are increasingly having to interoperate with APIs and object models defined in dynamic languages. This impedance mismatch results in code that is difficult to understand, awkward to ...

Gavin Bierman; Erik Meijer; Mads Torgersen

2010-06-01T23:59:59.000Z

370

Dynamic Graphics Using Quasi Parallelism  

E-Print Network (OSTI)

Dynamic computer graphics is best represented as several processes operating in parallel. Full parallel processing, however, entails much complex mechanism making it difficult to write simple, intuitive programs for ...

Kahn, Kenneth M.

1978-06-01T23:59:59.000Z

371

Theoretical Experiments on Cumulus Dynamics  

Science Conference Proceedings (OSTI)

The sensitivity of a two-dimensional cloud model to changes in microphysical characteristics was examined using two soundings. The dynamical evolution of clouds having relatively warm bases was controlled more by rapidity of the production of ...

L. Randall Koenig; Francis W. Murray

1983-05-01T23:59:59.000Z

372

Quasigeostrophic Dynamics of the Tropopause  

Science Conference Proceedings (OSTI)

The dynamical properties of potential temperature anomalies on the tropopause are analyzed for quasigeo-strophic flow on an f plane. The potential vorticity is taken to he piecewise constant, with a single discontinuity at the tropopause. The ...

Martin Juckes

1994-10-01T23:59:59.000Z

373

THz Dynamic Nuclear Polarization NMR  

E-Print Network (OSTI)

Dynamic nuclear polarization (DNP) increases the sensitivity of nuclear magnetic resonance (NMR) spectroscopy by using high frequency microwaves to transfer the polarization of the electrons to the nuclear spins. The ...

Nanni, Emilio Alessandro

374

EPRI Power System Dynamics Tutorial  

Science Conference Proceedings (OSTI)

Operation of today's increasingly complex power systems requires comprehensive training of system operators and operations engineers. By increasing their awareness and understanding of dynamic phenomena, the EPRI Power System Dynamics Tutorial can improve an operator's ability to take effective actioneither preventive or corrective. This latest version of the tutorial represents an update of key topics to reflect industry restructuring under the vision of the Federal Energy Regulatory Commission (FERC) a...

2009-07-27T23:59:59.000Z

375

Dynamic modeling of power systems  

Science Conference Proceedings (OSTI)

Morgantown Energy Technology Center`s (METC) Process and Project Engineering (P&PE) personnel continue to refine and modify dynamic modeling or simulations for advanced power systems. P&PE, supported by Gilbert/Commonwealth, Inc. (G/C), has adapted PC/TRAX commercial dynamic software to include equipment found in advanced power systems. PC/TRAX`s software contains the equations that describe the operation of standard power plant equipment such as gas turbines, feedwater pumps, and steam turbines. The METC team has incorporated customized dynamic models using Advanced Continuous Simulation Language (ACSL) code for pressurized circulating fluidized-bed combustors, carbonizers, and other components that are found in Advanced Pressurized Fluidized-Bed Combustion (APFBC) systems. A dynamic model of a commercial-size APFBC power plant was constructed in order to determine representative operating characteristics of the plant and to gain some insight into the best type of control system design. The dynamic model contains both process and control model components. This presentation covers development of a model used to describe the commercial APFBC power plant. Results of exercising the model to simulate plant performance are described and illustrated. Information gained during the APFBC study was applied to a dynamic model of a 1-1/2 generation PFBC system. Some initial results from this study are also presented.

Reed, M.; White, J.

1995-12-01T23:59:59.000Z

376

HAWT performance with dynamic stall  

DOE Green Energy (OSTI)

In this report we calculated the effects of flow nonuniformities (wing shear, tower wake, yaw, and large-scale turbulence) on the performance of a horizontal axis wind turbine, accounting for dynamic stall. We modified the PROP program to incorporate and compare these effects with the uniform flow case. The MIT model, which predicts dynamic lift coefficients substantially higher than the static maximum values and includes a crude model of the vortex roll-off phenomenon, represented dynamic stall. As associated model for drag was also used. The dynamic stall model was tested against experimental data for three typical reduced frequencies. Good instantaneous correlation was obtained. The effects of nonuniformities with and without the dynamic stall were calculated using the Westinghouse Mod O and Enertech 44/25 turbines. Modeling the dynamic stall has little effect on performance. Furthermore, the performance with nonuniform flow differed only slightly from the uniform flow case. Thus the now PROP model provides a powerful general capability to handle nonuniform flows.

Hibbs, B.D.

1986-02-01T23:59:59.000Z

377

Projected dynamical systems in a complementarity formalism  

Science Conference Proceedings (OSTI)

Projected dynamical systems have been introduced by Dupuis and Nagurney as dynamic extensions of variational inequalities. In the systems and control literature, complementarity systems have been studied as input/output dynamical systems whose inputs ... Keywords: Complementarity, Discontinuous dynamical systems, Optimization, Systems theory, Variational inequalities

W. P. M. H. Heemels; J. M. Schumacher; S. Weiland

2000-09-01T23:59:59.000Z

378

Solitary Matter Waves in Combined Linear and Nonlinear Potentials: Detection, Stability, and Dynamics  

E-Print Network (OSTI)

We study statically homogeneous Bose-Einstein condensates with spatially inhomogeneous interactions and outline an experimental realization of compensating linear and nonlinear potentials that can yield constant-density solutions. We illustrate how the presence of a step in the nonlinearity coefficient can only be revealed dynamically and consider, in particular, how to reveal it by exploiting the inhomogeneity of the sound speed with a defect-dragging experiment. We conduct computational experiments and observe the spontaneous emergence of dark solitary waves. We use effective-potential theory to perform a detailed analytical investigation of the existence and stability of solitary waves in this setting, and we corroborate these results computationally using a Bogoliubov-de Gennes linear stability analysis. We find that dark solitary waves are unstable for all step widths, whereas bright solitary waves can become stable through a symmetry-breaking bifurcation as one varies the step width. Using phase-plane analysis, we illustrate the scenarios that permit this bifurcation and explore the dynamical outcomes of the interaction between the solitary wave and the step.

Scott Holmes; Mason A. Porter; Peter Krüger; Panayotis G. Kevrekidis

2013-01-08T23:59:59.000Z

379

Simple Dynamic Gasifier Model That Runs in Aspen Dynamics  

SciTech Connect

Gasification (or partial oxidation) is a vital component of 'clean coal' technology. Sulfur and nitrogen emissions can be reduced, overall energy efficiency is increased, and carbon dioxide recovery and sequestration are facilitated. Gasification units in an electric power generation plant produce a fuel for driving combustion turbines. Gasification units in a chemical plant generate gas, which can be used to produce a wide spectrum of chemical products. Future plants are predicted to be hybrid power/chemical plants with gasification as the key unit operation. The widely used process simulator Aspen Plus provides a library of models that can be used to develop an overall gasifier model that handles solids. So steady-state design and optimization studies of processes with gasifiers can be undertaken. This paper presents a simple approximate method for achieving the objective of having a gasifier model that can be exported into Aspen Dynamics. The basic idea is to use a high molecular weight hydrocarbon that is present in the Aspen library as a pseudofuel. This component should have the same 1:1 hydrogen-to-carbon ratio that is found in coal and biomass. For many plantwide dynamic studies, a rigorous high-fidelity dynamic model of the gasifier is not needed because its dynamics are very fast and the gasifier gas volume is a relatively small fraction of the total volume of the entire plant. The proposed approximate model captures the essential macroscale thermal, flow, composition, and pressure dynamics. This paper does not attempt to optimize the design or control of gasifiers but merely presents an idea of how to dynamically simulate coal gasification in an approximate way.

Robinson, P.J.; Luyben, W.L. [Lehigh University, Bethlehem, PA (United States). Dept. of Chemical Engineering

2008-10-15T23:59:59.000Z

380

DYNAMIC SCREENING IN SOLAR PLASMA  

Science Conference Proceedings (OSTI)

In the hot, dense plasma of solar and stellar interiors, Coulomb potentials are screened, resulting in increased nuclear reaction rates. Although Salpeter's approximation for static screening is widely accepted and used in stellar modeling, the question of screening in nuclear reactions has been revisited. In particular, the issue of dynamic effects has been raised by Shaviv and Shaviv who apply the techniques of molecular dynamics to the conditions in the Sun's core in order to numerically determine the effect of screening. By directly calculating the motion of ions and electrons due to Coulomb interactions, the simulations are used to compute the effect of screening without the mean field assumption inherent in Salpeter's approximation. In this paper, we reproduce their numerical analysis of the screening energy in the plasma of the solar core and conclude that the effects of dynamic screening are relevant and should be included when stellar nuclear reaction rates are computed.

Mao, Dan; Daeppen, Werner [Department of Physics and Astronomy, University of Southern California, Los Angeles, CA 90089 (United States); Mussack, Katie [Institute of Astronomy, University of Cambridge, Cambridge CB3 0HA (United Kingdom)], E-mail: mussack@ast.cam.ac.uk

2009-08-20T23:59:59.000Z

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


381

Nonlinear Fluid Dynamics from Gravity  

E-Print Network (OSTI)

Black branes in AdS5 appear in a four parameter family labeled by their velocity and temperature. Promoting these parameters to Goldstone modes or collective coordinate fields -- arbitrary functions of the coordinates on the boundary of AdS5 -- we use Einstein's equations together with regularity requirements and boundary conditions to determine their dynamics. The resultant equations turn out to be those of boundary fluid dynamics, with specific values for fluid parameters. Our analysis is perturbative in the boundary derivative expansion but is valid for arbitrary amplitudes. Our work may be regarded as a derivation of the nonlinear equations of boundary fluid dynamics from gravity. As a concrete application we find an explicit expression for the expansion of this fluid stress tensor including terms up to second order in the derivative expansion.

Sayantani Bhattacharyya; Veronika E Hubeny; Shiraz Minwalla; Mukund Rangamani

2007-12-14T23:59:59.000Z

382

Ab-Initio Molecular Dynamics  

E-Print Network (OSTI)

Computer simulations and molecular dynamics in particular, is a very powerful method to provide detailed and essentially exact informations of classical many-body problems. With the advent of \\textit{ab-initio} molecular dynamics, where the forces are computed on-the-fly by accurate electronic structure calculations, the scope of either method has been greatly extended. This new approach, which unifies Newton's and Schr\\"odinger's equations, allows for complex simulations without relying on any adjustable parameter. This review is intended to outline the basic principles as well as a survey of the field. Beginning with the derivation of Born-Oppenheimer molecular dynamics, the Car-Parrinello method as well as novel hybrid scheme that unifies best of either approach are discussed. The predictive power is demonstrated by a series of applications ranging from insulators to semiconductors and even metals in condensed phases.

Kühne, Thomas D

2012-01-01T23:59:59.000Z

383

Dynamic screening in solar plasma  

E-Print Network (OSTI)

In the hot, dense plasma of solar and stellar interiors, Coulomb potentials are screened, resulting in increased nuclear reaction rates. Although Salpeter's approximation for static screening is widely accepted and used in stellar modeling, the question of screening in nuclear reactions has been revisited. In particular the issue of dynamic effects has been raised by Shaviv and Shaviv who apply the techniques of molecular dynamics to the conditions in the Sun's core in order to numerically determine the effect of screening. By directly calculating the motion of ions and electrons due to Coulomb interactions, the simulations are used to compute the effect of screening without the mean-field assumption inherent in Salpeter's approximation. In this paper we reproduce their numerical analysis of the screening energy in the plasma of the solar core and conclude that the effects of dynamic screening are relevant and should be included when stellar nuclear reaction rates are computed.

Mao, Dan; Däppen, Werner

2009-01-01T23:59:59.000Z

384

A multipulsed dynamic moire interferometer  

DOE Patents (OSTI)

An improved dynamic moire interferometer is described that is comprised of a lasing medium providing a plurality of beams of coherent light, a multiple q-switch producing multiple trains of 100,000 or more pulses per second, a combining means collimating multiple trains of pulses into substantially a single train and directing beams to specimen gratings affixed to a test material, and a controller, triggering and sequencing the emission of the pulses with the occurrence and recording of a dynamic loading event. 5 figs.

Deason, V.A.

1989-06-10T23:59:59.000Z

385

Fairness and dynamic pricing: comments  

Science Conference Proceedings (OSTI)

In ''The Ethics of Dynamic Pricing,'' Ahmad Faruqui lays out a case for improved efficiency in using dynamic prices for retail electricity tariffs and addresses various issues about the distributional effects of alternative pricing mechanisms. The principal contrast is between flat or nearly constant energy prices and time-varying prices that reflect more closely the marginal costs of energy and capacity. The related issues of fairness criteria, contracts, risk allocation, cost allocation, means testing, real-time pricing, and ethical policies of electricity market design also must be considered. (author)

Hogan, William W.

2010-07-15T23:59:59.000Z

386

Nonlinear manifold learning for dynamic shape and dynamic appearance  

Science Conference Proceedings (OSTI)

Our objective is to learn representations for the shape and the appearance of moving (dynamic) objects that support tasks such as synthesis, pose recovery, reconstruction, and tracking. In this paper, we introduce a framework that aims to learn landmark-free ... Keywords: Appearance-based vision, Gait analysis, Human motion analysis, Manifold learning, Motion analysis, Shape analysis

Ahmed Elgammal; Chan-Su Lee

2007-04-01T23:59:59.000Z

387

Dynamic Scheduling via Polymatroid Optimization  

Science Conference Proceedings (OSTI)

Dynamic scheduling of multi-class jobs in queueing systems has wide ranging applications, but in general is a very difficult control problem. Here we focus on a class of systems for which conservation laws hold. Consequently, the performance space becomes ...

David D. Yao

2002-01-01T23:59:59.000Z

388

Environmental design using dynamic insulation  

SciTech Connect

In conventional airtight buildings, the architect has considerable freedom to decide how much the external environment will influence the internal heating, cooling, and ventilation loads. The services engineer provides the plant and equipment required to deal with these loads. This division of labor could lead to undesirable consequences in the case of dynamic insulation, a form of air permeable construction where bulk air flow through the building envelope may be used to either enhance or restrict the conductive heat and mass diffusion fluxes. Small changes in temperature (indoor and out) and wind speed and direction will influence the behavior of a dynamically insulated envelope since the internal and external environments are much more intimately coupled. Buildings employing dynamic insulation thus require good environmental design principles to be applied. The objective of this paper is to lay down rigorous principles that will form the basis of guidelines to architects and building services engineers on how to take account of the ever changing external environment when designing durable and comfortable buildings employing dynamic insulation.

Taylor, B.J.; Imbabi, M.S.

2000-07-01T23:59:59.000Z

389

Conspicuous Consumption and Dynamic Pricing  

Science Conference Proceedings (OSTI)

How do firms develop marketing strategy when consumers seek to satisfy both quality and status-related considerations? We develop an analytical model to study this issue, examining both pricing and product management decisions in markets for conspicuous ... Keywords: conspicuous consumption, durable goods, dynamic pricing, game theory, status

Raghunath Singh Rao, Richard Schaefer

2013-09-01T23:59:59.000Z

390

Dynamical genetic programming in xcsf  

Science Conference Proceedings (OSTI)

A number of representation schemes have been presented for use within learning classifier systems, ranging from binary encodings to artificial neural networks. This paper presents results from an investigation into using a temporally dynamic symbolic ... Keywords: Graph-based genetic programming, XCSF, learning classifier systems, multistep-ahead prediction, reinforcement learning, self-adaptation, symbolic regression

Richard J. Preen, Larry Bull

2013-09-01T23:59:59.000Z

391

Dynamic virtual credit card numbers  

Science Conference Proceedings (OSTI)

Theft of stored credit card information is an increasing threat to e-commerce.We propose a dynamic virtual credit card number scheme that reduces the damage caused by stolen credit card numbers. A user can use an existing credit card account to generate ... Keywords: credit card theft, e-commerce

Ian Molloy; Jiangtao Li; Ninghui Li

2007-02-01T23:59:59.000Z

392

* TIAA-CREF consultants receive no commissions. They are compensated through a salary plus incentive program. You should consider the investment objectives, risks, charges and expenses carefully before investing. Please call  

E-Print Network (OSTI)

* TIAA-CREF consultants receive no commissions. They are compensated through a salary plus before investing. Please call 877 518-9161 or go to tiaa-cref.org for a prospectus that contains this and other information. Please read the prospectus carefully before investing. TIAA-CREF Individual

393

Gate-turn-off thyristors provide new level of power-flow control  

SciTech Connect

The availability of high-power, gate-turn-off (GTO) thyristors has made possible the development of a new class of solid-state devices that promise an unprecedented degree of control over the flow of power in the nation`s network. The first of these, a static compensator known as Statcom, which offers dynamic control over the flow of VArs into, or out of, the network, was unveiled last month at the Tennessee Valley Authority`s (TVA) Sullivan substation in eastern Tennessee. The principal element of the Statcom is a voltage-sourced inverter that converts dc voltage at its input terminals into a 3-phase alternating output voltage. To eliminate the quasi square wave that a single inverter would generate - along with unacceptable harmonics - the Statcom uses many such inverters, appropriately phase-shifted, and combines their outputs through electromagnetic linkages to produce a nearly sinusoidal output waveform. By numerous voltage additions and subtractions, eight inverters used in the Statcom generate a 48-pulse, nearly sinusoidal output waveform. The GTO-based inverters and electronic feedback control give the Statcom a dynamic performance far exceeding that of other reactive power compensators. In fact, the device can transition from full rated capacitive to full-rated VArs in approximately one-quarter cycle. Nominal rating of each inverter is 12.5 MVA. 12 figs.

NONE

1995-12-01T23:59:59.000Z

394

Ocean dynamics and thermodynamics in the tropical Indo- Pacific region  

E-Print Network (OSTI)

Ocean dynamics and thermodynamics in the tropical Indo-Ocean dynamics and thermodynamics in the tropical Indo-affect the dynam- ics and thermodynamics of the upper ocean.

Drushka, Kyla

2011-01-01T23:59:59.000Z

395

Forecasting with Dynamic Microsimulation: Design, Implementation, and Demonstration  

E-Print Network (OSTI)

Goulias Page 84 Forecasting with Dynamic Microsimulation:Goulias Page 80 Forecasting with Dynamic Microsimulation:L. Demographic Forecasting with a Dynamic Stochastic

Ravulaparthy, Srinath; Goulias, Konstadinos G.

2011-01-01T23:59:59.000Z

396

Efficient Multiagent Coordination in Dynamic Environments  

Science Conference Proceedings (OSTI)

Agent coordination is a fundamental task in designing and operating multiagent systems. However, in dynamically changing environments, coordination must balance proactive and reactive behaviors in order to enable efficient operations while retaining ... Keywords: multiagent coordination, dynamics, adaption, social order generation

Jan Ole Berndt; Otthein Herzog

2011-08-01T23:59:59.000Z

397

A dynamic semantics of intentional identity  

Science Conference Proceedings (OSTI)

This paper will propose a new version of Dynamic Modal Predicate Logic (DMPL) to treat dynamics of intentional identity [1] and other similar notions such as weak intentional identity and multiple intentional identity by revising the DMPL of modal subordination ...

Norihiro Ogata

2006-06-01T23:59:59.000Z

398

System dynamics simulation of the telecom industry  

E-Print Network (OSTI)

The primary goal of this research effort was to integrate several pieces of relatively simple dynamics simulations into a full blown system dynamics simulation of the telecom industry. The economic simulation model was ...

Shapira, Gil, 1971-

2004-01-01T23:59:59.000Z

399

Dynamic archive evolution strategy for multiobjective optimization  

Science Conference Proceedings (OSTI)

This paper proposes a new multiobjective evolutionary approach—the dynamic archive evolution strategy (DAES) to investigate the adaptive balance between proximity and diversity. In DAES, a novel dynamic external archive is proposed to store elitist ...

Yang Shu Min; Shao Dong Guo; Luo Yang Jie

2005-03-01T23:59:59.000Z

400

A generative model for dynamic canvas motion  

Science Conference Proceedings (OSTI)

We present techniques for constructing realistic canvas and paper models and for enabling interactive dynamic canvas motion. Dynamic canvas motion means that there is a correspondence between the motion of canvas features and the motion of the models ...

Matthew Kaplan; Elaine Cohen

2005-05-01T23:59:59.000Z

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


401

Mathematics 658 Nonlinear Dynamics and Mechanics  

E-Print Network (OSTI)

Mathematics 658 Nonlinear Dynamics and Mechanics Instructor: Anthony M. Bloch. Office: 4842 East differential equations and dynamical systems, with applications to various mechanical and physical systems, nonlinear stability theory, Lagrangian and Hamiltonian mechanics, integrable systems, reduction

Bloch, Anthony

402

Lab experiences for teaching undergraduate dynamics  

E-Print Network (OSTI)

This thesis describes several projects developed to teach undergraduate dynamics and controls. The materials were developed primarily for the class 2.003 Modeling Dynamics and Control I. These include (1) a set of ActivLab ...

Lilienkamp, Katherine A. (Katherine Ann), 1969-

2003-01-01T23:59:59.000Z

403

A Nonlinear Dynamical Perspective on Climate Prediction  

Science Conference Proceedings (OSTI)

A nonlinear dynamical perspective on climate prediction is outlined, based on a treatment of climate as the attractor of a nonlinear dynamical system D with distinct quasi-stationary regimes. The main application is toward anthropogenic climate ...

T. N. Palmer

1999-02-01T23:59:59.000Z

404

DYNAMIC APERTURE OF THE ALS BOOSTER SYNCHROTRON  

E-Print Network (OSTI)

Nelson, "Magnetic Properties of the ALS noosler Synchrotron23,1989 Dynamic Aperture of the ALS Booster Synchrotron C.H.DYNAMIC APERTURE OF TIlE ALS BOOSTER SYNCIIROlRON· CharI""

Kim, C.H.

2010-01-01T23:59:59.000Z

405

Dynamic Demand Input Preparation for Planning Applications  

E-Print Network (OSTI)

model to the ground truth Table 3-2 summarizes the Meanground truth and in preparing the seed dynamic OD table inground truth and the one in preparing seed dynamic OD tables

Jintanakul, Klayut

2009-01-01T23:59:59.000Z

406

Optimization of naïve dynamic binary instrumentation Tools/  

E-Print Network (OSTI)

The proliferation of dynamic program analysis tools has done much to ease the burden of developing complex software. However, creating such tools remains a challenge. Dynamic binary instrumentation frameworks such as ...

Kleckner, Reid (Reid N.)

2011-01-01T23:59:59.000Z

407

Bayesian inference of stochastic dynamical models  

E-Print Network (OSTI)

A new methodology for Bayesian inference of stochastic dynamical models is developed. The methodology leverages the dynamically orthogonal (DO) evolution equations for reduced-dimension uncertainty evolution and the Gaussian ...

Lu, Peter Guang Yi

2013-01-01T23:59:59.000Z

408

Iterated dynamical maps in an ion trap  

E-Print Network (OSTI)

Iterated dynamical maps offer an ideal setting to investigate quantum dynamical bifurcations and are well adapted to few-qubit quantum computer realisations. We show that a single trapped ion, subject to periodic impulsive forces, exhibits a rich structure of dynamical bifurcations derived from the Jahn-Teller Hamiltonian flow model. We show that the entanglement between the oscillator and electronic degrees of freedom reflects the underlying dynamical bifurcation in a Floquet eigenstate.

M. Duncan; J. Links; G. J. Milburn

2007-11-16T23:59:59.000Z

409

Dynamic Measurement of Hydraulic Parameters Under Liquid ...  

Search PNNL. PNNL Home; About; Research; Publications; Jobs; News; Contacts; Dynamic Measurement of Hydraulic Parameters Under Liquid Unsaturated Flow ...

410

Dynamic Links and Distributed Computing - CECM  

E-Print Network (OSTI)

Dynamic Links and Distributed Computing ... Next: Advanced Collaboration via Up: InternetExecutable Content, Previous: The Third-Generation Internet ...

411

Information Relaxations, Duality, and Convex Dynamic Programs  

E-Print Network (OSTI)

Oct 15, 2013 ... Abstract: We consider the information relaxation approach for calculating performance bounds for stochastic dynamic programs (DPs), ...

412

Molecular Dynamics Simulations of Thermoset Polymers for ...  

Science Conference Proceedings (OSTI)

Materials Genomics Past & Future: From CALPHAD to Flight · Modelling the Properties of Multi-Component Commercial Alloys · Molecular Dynamics ...

413

Risk-Averse Stochastic Dual Dynamic Programming  

E-Print Network (OSTI)

Feb 27, 2013 ... dynamic programming for hydroelectricity generation, Technical report, Electric Power Opti- mization Centre, University of Auckland, ...

414

PUBSAT and NERVA launcher fuel sloshing dynamics  

Science Conference Proceedings (OSTI)

Structural dynamics of the NERVA orbital launcher and of the PUBSAT nanosatellite is presented, with emphasize on loading definition including dynamic effects of liquid sloshing phenomena in the propellant tanck. Mainly subjected to considerable longitudinal ... Keywords: flight control, flight dynamics, fuel sloshing, satellites launcher, stability of motion

Radu D. Rugescu; Ion Predoiu; Sorin Aldea

2008-06-01T23:59:59.000Z

415

Stochastic Event-Driven Molecular Dynamics  

Science Conference Proceedings (OSTI)

A novel Stochastic Event-Driven Molecular Dynamics (SEDMD) algorithm is developed for the simulation of polymer chains suspended in a solvent. SEDMD combines event-driven molecular dynamics (EDMD) with the Direct Simulation Monte Carlo (DSMC) method. ... Keywords: Complex flow, DSMC, Event-driven molecular dynamics, Polymer suspension

Aleksandar Donev; Alejandro L. Garcia; Berni J. Alder

2008-02-01T23:59:59.000Z

416

Predicting locality phases for dynamic memory optimization  

Science Conference Proceedings (OSTI)

Dynamic data, cache, and memory adaptation can significantly improve program performance when they are applied on long continuous phases of execution that have dynamic but predictable locality. To support phase-based adaptation, this paper defines the ... Keywords: Dynamic optimization, Locality analysis and optimization, Phase hierarchy, Program phase prediction, Reconfigurable architecture

Xipeng Shen; Yutao Zhong; Chen Ding

2007-07-01T23:59:59.000Z

417

A thread calculus with molecular dynamics  

Science Conference Proceedings (OSTI)

We present a theory of threads, interleaving of threads, and interaction between threads and services with features of molecular dynamics, a model of computation that bears on computations in which dynamic data structures are involved. Threads can interact ... Keywords: Molecular dynamics, Projective limit model, Restriction, Thread algebra, Thread calculus

J. A. Bergstra; C. A. Middelburg

2010-07-01T23:59:59.000Z

418

Classification with dynamic reducts and belief functions  

Science Conference Proceedings (OSTI)

In this paper, we propose two approaches of classification namely, Dynamic Belief Rough Set Classifier (D-BRSC) and Dynamic Belief Rough Set Classifier based on Generalization Distribution Table (D-BRSC-GDT). Both the classifiers are induced from uncertain ... Keywords: belief function theory, classification, dynamic reduct, generalization distribution table, rough sets, uncertainty

Salsabil Trabelsi; Zied Elouedi; Pawan Lingras

2011-01-01T23:59:59.000Z

419

Dynamical instability of collapsing radiating fluid  

SciTech Connect

We take the collapsing radiative fluid to investigate the dynamical instability with cylindrical symmetry. We match the interior and exterior cylindrical geometries. Dynamical instability is explored at radiative and non-radiative perturbations. We conclude that the dynamical instability of the collapsing cylinder depends on the critical value {gamma} < 1 for both radiative and nonradiative perturbations.

Sharif, M., E-mail: msharif.math@pu.edu.pk; Azam, M., E-mail: azammath@gmail.com [University of the Punjab, Department of Mathematics (Pakistan)

2013-06-15T23:59:59.000Z

420

Unwinding relaxation dynamics of polymers  

E-Print Network (OSTI)

The relaxation dynamics of a polymer wound around a fixed obstacle constitutes a fundamental instance of polymer with twist and torque and it is of relevance also for DNA denaturation dynamics. We investigate it by simulations and Langevin equation analysis. The latter predicts a relaxation time scaling as a power of the polymer length times a logarithmic correction related to the equilibrium fluctuations of the winding angle. The numerical data support this result and show that at short times the winding angle decreases as a power-law. This is also in agreement with the Langevin equation provided a winding-dependent friction is used, suggesting that such reduced description of the system captures the basic features of the problem.

Jean-Charles Walter; Marco Baiesi; Gerard Barkema; Enrico Carlon

2013-01-13T23:59:59.000Z

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


421

Dynamic load balancing of applications  

DOE Patents (OSTI)

An application-level method for dynamically maintaining global load balance on a parallel computer, particularly on massively parallel MIMD computers. Global load balancing is achieved by overlapping neighborhoods of processors, where each neighborhood performs local load balancing. The method supports a large class of finite element and finite difference based applications and provides an automatic element management system to which applications are easily integrated.

Wheat, Stephen R. (Albuquerque, NM)

1997-01-01T23:59:59.000Z

422

Dynamic load balancing of applications  

DOE Patents (OSTI)

An application-level method for dynamically maintaining global load balance on a parallel computer, particularly on massively parallel MIMD computers is disclosed. Global load balancing is achieved by overlapping neighborhoods of processors, where each neighborhood performs local load balancing. The method supports a large class of finite element and finite difference based applications and provides an automatic element management system to which applications are easily integrated. 13 figs.

Wheat, S.R.

1997-05-13T23:59:59.000Z

423

Models and Model Validation for Planning Studies: Technical Update  

Science Conference Proceedings (OSTI)

In the last decade or so there has been an increase in the deployment of modern transmission technologies such as static var compensation devices and high-voltage direct-current (HVDC) transmission systems. The deployment of HVDC is likely to increase given the many proposals presently for bringing large and remote pockets of wind generation resources to load centers and proposals in Europe for the development of off-shore grids for wind generation. Furthermore, the deployment of static var compensation ...

2011-12-20T23:59:59.000Z

424

Harmonics from SVC transformer saturation with direct current offset  

SciTech Connect

Circulation of direct current in transformer windings can cause significant transformer saturation and harmonic generation. This problem may be experienced by static var compensators with anti-parallel thyristor arrangement. This paper presents a technique to analyze the harmonic distortions caused by transformer saturation with direct current offset. The technique is used to investigate the harmonic generation from the transformer of a static var compensator to be installed in the B.C. Hydro system.

Xu, W.; Martinich, T.G.; Sawada, J.H.; Mansour, Y. (British Columbia Hydro, Burnaby, British Columbia (Canada))

1994-07-01T23:59:59.000Z

425

Technical Update -- Planning Study Model Development and Management  

Science Conference Proceedings (OSTI)

Presently, there has been an increase in the deployment of modern transmission technologies such as static var compensation devices and high-voltage direct-current (HVDC) transmission systems. The deployment of HVDC is likely to increase given the many proposals presently for bringing large and remote pockets of wind generation resources to load centers and proposals in Europe for the development of off-shore grids for wind generation. Furthermore, the deployment of static var compensation ...

2012-11-30T23:59:59.000Z

426

Limit Cycle and Conserved Dynamics  

E-Print Network (OSTI)

We demonstrate that a potential coexists with limit cycle. Here the potential determines the final distribution of population. Our demonstration consists of three steps: We first show the existence of limit from a typical physical sciences setting: the potential is a type of Mexican hat type, with the strength of a magnetic field scale with the strength the potential gradient near the limit cycle, and the friction goes to zero faster than the potential near the limit cycle. Hence the dynamics at the limit cycle is conserved. The diffusion matrix is nevertheless finite at the limit cycle. Secondly, we construct the potential in the dynamics with limit cycle in a typical dynamical systems setting. Thirdly, we argue that such a construction can be carried out in a more general situation based on a method discovered by one of us. This method of dealing with stochastic differential equation is in general different from both Ito and Stratonovich calculus. Our result may be useful in many related applications, such as in the discussion of metastability of limit cycle and in the construction of Hopfield potential in the neural network computation.

X. -M. Zhu; L. Yin; P. Ao

2004-12-21T23:59:59.000Z

427

Turbo Dynamics | Open Energy Information  

Open Energy Info (EERE)

Turbo Dynamics Turbo Dynamics Jump to: navigation, search Name Turbo Dynamics Address 3235 River rd. Place Toledo, Ohio Zip 43614 Sector Biomass, Buildings, Efficiency, Renewable Energy, Services, Solar Product Agriculture; Consulting;Energy audits/weatherization; Engineering/architectural/design;Installation; Maintenance and repair;Manufacturing; Research and development;Retail product sales and distribution;Trainining and education Phone number 419-382-7287 Website http://www.turbodradial.com Coordinates 41.607247°, -83.591719° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.607247,"lon":-83.591719,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

428

Dynamical 3-Space: Emergent Gravity  

E-Print Network (OSTI)

The laws of gravitation devised by Newton, and by Hilbert and Einstein, have failed many experimental and observational tests, namely the bore hole g anomaly, flat rotation curves for spiral galaxies, supermassive black hole mass spectrum, uniformly expanding universe, cosmic filaments, laboratory G measurements, galactic EM bending, precocious galaxy formation,.. The response has been the introduction of the new epicycles: ``dark matter", ``dark energy", and others. To understand gravity we must restart with the experimental discoveries by Galileo, and following a heuristic argument we are led to a uniquely determined theory of a dynamical 3-space. That 3-space exists has been missed from the beginning of physics, although it was 1st directly detected by Michelson and Morley in 1887. Uniquely generalising the quantum theory to include this dynamical 3-space we deduce the response of quantum matter and show that it results in a new account of gravity, and explains the above anomalies and others. The dynamical theory for this 3-space involves G, which determines the dissipation rate of space by matter, and alpha, which experiments and observation reveal to be the fine structure constant. For the 1st time we have a comprehensive account of space and matter and their interaction - gravity.

Reginald T Cahill

2011-02-16T23:59:59.000Z

429

Earth materials and earth dynamics  

Science Conference Proceedings (OSTI)

In the project ''Earth Materials and Earth Dynamics'' we linked fundamental and exploratory, experimental, theoretical, and computational research programs to shed light on the current and past states of the dynamic Earth. Our objective was to combine different geological, geochemical, geophysical, and materials science analyses with numerical techniques to illuminate active processes in the Earth. These processes include fluid-rock interactions that form and modify the lithosphere, non-linear wave attenuations in rocks that drive plate tectonics and perturb the earth's surface, dynamic recrystallization of olivine that deforms the upper mantle, development of texture in high-pressure olivine polymorphs that create anisotropic velocity regions in the convecting upper mantle and transition zone, and the intense chemical reactions between the mantle and core. We measured physical properties such as texture and nonlinear elasticity, equation of states at simultaneous pressures and temperatures, magnetic spins and bonding, chemical permeability, and thermal-chemical feedback to better characterize earth materials. We artificially generated seismic waves, numerically modeled fluid flow and transport in rock systems and modified polycrystal plasticity theory to interpret measured physical properties and integrate them into our understanding of the Earth. This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL).

Bennett, K; Shankland, T. [and others

2000-11-01T23:59:59.000Z

430

Dynamical aspects of isotopic scaling  

E-Print Network (OSTI)

Investigation of the effect of the dynamical stage of heavy-ion collisions indicates that the increasing width of the initial isospin distributions is reflected by a significant modification of the isoscaling slope for the final isotopic distributions after de-excitation. For narrow initial distributions, the isoscaling slope assumes the limiting value of the two individual initial nuclei while for wide initial isotopic distributions the slope for hot fragments approaches the initial value. The isoscaling slopes for final cold fragments increase due to secondary emissions. The experimentally observed evolution of the isoscaling parameter in multifragmentation of hot quasiprojectiles at E$_{inc}$=50 AMeV, fragmentation of $^{86}$Kr projectiles at E$_{inc}$=25 AMeV and multifragmentation of target spectators at relativistic energies was reproduced by a simulation with the dynamical stage described using the appropriate model (deep inelastic transfer and incomplete fusion at the Fermi energy domain and spectator-participant model at relativistic energies) and the de-excitation stage described with the statistical multifragmentation model. In all cases the isoscaling behavior was reproduced by a proper description of the dynamical stage and no unambiguous signals of the decrease of the symmetry energy coefficient were observed.

M. Veselsky

2006-07-17T23:59:59.000Z

431

Scalability of Dynamic Storage Allocation Algorithms  

E-Print Network (OSTI)

Dynamic storage allocation has a significant impact on computer performance. A dynamic storage allocator manages space for objects whose lifetimes are not known by the system at the time of their creation. A good dynamic storage allocator should utilize storage efficiently and satisfy requests in as few instructions as possible. A dynamic storage allocator on a multiprocessor should have the ability to satisfy multiple requests concurrently. This paper examines parallel dynamic storage allocation algorithms and how performancescales with increasing numbers of processors. The highest throughputs and lowest instruction counts are achieved with multiple free list fit I. The best memory utilization is achieved using a best fit system.

Arun Iyengar

1996-01-01T23:59:59.000Z

432

Behavior of Laminate Reactive Materials under Dynamic Loading ...  

Science Conference Proceedings (OSTI)

Presentation Title, Behavior of Laminate Reactive Materials under Dynamic Loading ... Atomistically-Informed Dislocation Dynamics Simulations of High Rate  ...

433

Dynamic Pressure Sensing during Rapid Combustion of Metal ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2011 TMS Annual Meeting & Exhibition. Symposium , Dynamic Behavior of Materials V. Presentation Title, Dynamic Pressure ...

434

Fiscal year 1995 progress in implementing Section 120 of the Comprehensive Environmental Response, Compensation, and Liability Act. Ninth annual report to Congress  

SciTech Connect

Congress passed the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) (Public Law 96-510), commonly known as Superfund, in 1980. The Superfund Amendments and Reauthorization Act (SARA) which amended CERCLA in 1986, added Section 120 regarding the cleanup of contaminated sites at Federal facilities. Under Section 120(e)(5) of CERCLA, each department, agency, or instrumentality of the Federal government responsible for compliance with Section 120 must submit an annual report to Congress concerning its progress in implementing the requirements of Section 120. The report must include information on the progress in reaching Interagency Agreements (IAGs), conducting Remedial Investigation and Feasibility Studies (RI/FSs), and performing remedial action. Federal agencies that own or operate facilities on the National priorities List (NPL) are required to begin an RI/FS for these facilities within 6 months after being placed on the NPL. Remediation of these facilities is addressed in an IAG between the Federal agency, the US Environmental Protection Agency (EPA), and in some instances the state within which the facility is located. This report provides the status of ongoing activities being performed in support of CERCLA Section 120 at DOE facilities. This includes activities conducted to reach IAGs and progress in conducting remedial actions.

NONE

1996-09-01T23:59:59.000Z

435

Fiscal year 1996 progress in implementing Section 120 of the Comprehensive Environmental Response, Compensation, and Liability Act. Tenth annual report to Congress  

Science Conference Proceedings (OSTI)

Congress passed the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) (Public Law 96-510), commonly known as Superfund, in 1980. The Superfund Amendments and Reauthorization Act (SARA) (Public Law 99-499), which amended CERCLA in 1986, added Section 120 regarding the cleanup of contaminated sites at Federal facilities. Under Section 120(e)(5) of CERCLA, each department, agency, or instrumentality of the Federal government responsible for compliance with Section 120 must submit an annual report to Congress concerning its progress in implementing the requirements of Section 120. The report must include information on the progress in reaching Interagency Agreements (IAGs), conducting remedial investigation and feasibility studies (RI/FSs), and performing remedial actions. Federal agencies that own or operate facilities on the National Priorities List (NPL) are required to begin an RI/FS for these facilities within 6 months after being placed on the NPL. Remediation of these facilities is addressed in an IAG between the Federal agency, the US Environmental Protection Agency (EPA), and in some instances the state within which the facility is located.

NONE

1997-12-01T23:59:59.000Z

436

Infinite Dimensional VARs and Factor Models  

E-Print Network (OSTI)

and any r 2 f1; ::;mg. ASSUMPTION 14 (Random factor loadings) isr = sr + #17;isr for s 2 f1; ::; kg , r 2 f1; ::;mg and any i 2 N, (69) where #17;isr #24; IID #0; 0; #27;2#17;sr #1; , isr does not change with N #21; i. #17;isr is independently... distributed of "r0t and ut for any s 2 f1; ::; kg ; r; r0 2 f1; ::;mg ; i 2 N and any t 2 Z. Furthermore, the third and the fourth moments of #17;isr are bounded. ASSUMPTION 15 (Non-random factor loadings) isr = O (1) for any i 2 N and any s 2 f1; ::; kg, r 2...

Chudik, Alexander; Pesaran, M Hashem

437

Dynamic reduction, Version 1. 0  

SciTech Connect

This report describes the theoretical background of the EPRI Dynamic Reduction DYNRED V 1.0. EPRI initiated research under project RP763 to develop the original reduction program DYNEQU. This program was the first to be based on the concept of aggregating of coherent groups of synchronous generators into a single equivalent generator model. While technically advanced, DYNEQU proved difficult to use. Since then, the stability problems encountered in power system planning and operations have changed. The emphasis on first swing transient stability has been replaced by emphasis on inter-area oscillations and voltage stability. The method of identification of coherent generators used in DYNEQU is based on the comparison of rotor angle swings, in a linearized system model, following a fault. It has been shown that this method of coherency identification is good for first swing stability. For inter-area oscillation studies, this method of generator aggregation is less accurate. Far better, are identification methods based on the structure of the power system. Because of these changes in the requirements for reduced order power system models, a new dynamic reduction program (DYNRED) has been developed under EPRI project RP2447-1. It is coherency based, as is DYNEQU, but it has structurally based coherency identification methods in addition to the method used in DYNEQU. This report describes the techniques used in DYNRED, that is: Coherency Identification; Network Reduction; Method of Aggregation, Generator Aggregation, Excitation Aggregation, Primemover/Governor Aggregation. An example of the application of DYNRED to the reduction of a large interconnected power system model is also presented. DYNRED uses the special modeling and network solution techniques developed to enable systems having up to 12,000 bus to be studied. Dynamic data is completely compatible between MASS, PEALS, and the EPRI Extended Transient Midterm Stability Program (ETMSP).

Rogers, G.J.; Wong, D.Y.; Ottevangers, J.; Wang, L. (Ontario Hydro, Toronto, ON (Canada))

1993-04-01T23:59:59.000Z

438

Dynamic Safety Systems (DSS) Technology  

Science Conference Proceedings (OSTI)

This report considers several aspects of Dynamic Safety System (DSS) technology and its use in United States (U.S.) light-water reactor (LWR) safety systems. The topics include: the capability of DSS technology to function in an LWR protection system, the feasibility of licensing DSS technology under Code of Federal Regulations 10 CFR 50.59 for use in a reactor protection system (RPS), and the possibility of extending the automatic self-testing regime to include the front-end neutron sensors that feed si...

1998-05-27T23:59:59.000Z

439

From Fundamentals to Nanoscale Dynamics  

Science Conference Proceedings (OSTI)

This text book gives a comprehensive account of magnetism, one of the oldest yet most vibrant fields of physics. It spans the historical development, the physical foundations and the continuing research underlying the subject. The book covers both the classical and quantum mechanical aspects of magnetism and novel experimental techniques. Perhaps uniquely, it discusses spin transport and magnetization dynamics phenomena associated with atomically and spin engineered nano-structures against the backdrop of spintronics and magnetic storage and memory applications. The book is for students, and serves as a reference for scientists in academia and research laboratories.

Stohr, J.; Siegmann, H.C.

2007-08-08T23:59:59.000Z

440

System D: Dependent Dynamic Dictionaries  

E-Print Network (OSTI)

We present System D, a novel dependent refinement type system that intermingles (semantic) logical refinement predicates and (syntactic) types in order to statically type dictionaries. Specifically, System D shows how McCarthy's theory of arrays can be used to precisely describe dictionary bindings, and uninterpreted predicate symbols can be used to embed classical type constructors (e.g. type variables, arrows, collections) into a decidable refinement logic. As a result, System D decomposes subtyping into a combination of SMT queries and classical syntactic subtyping, thereby enabling, for the first time, static type checking for programs that use dynamic dictionaries with polymorphic, higher-order functions.

Chugh, Ravi; Jhala, Ranjit

2011-01-01T23:59:59.000Z

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


441

Metallic phase-change materials for solar dynamic energy storage systems  

DOE Green Energy (OSTI)

Solar (thermal) dynamic power systems for satellites require a heat storage system that is capable of operating the engine during eclipse. The conventional approach to this thermal storage problem is to use the latent heat of fluoride salts, which would melt during insolation and freeze during eclipse. Although candidate fluorides have large heats of fusion per unit mass, their poor thermal conductivity limits the rate at which energy can be transferred to and from the storage device. System performance is further limited by the high parasitic mass of the superalloy canisters needed to contain the salt. This report describes a new thermal storage system in which the phase-change material (PCM) is a metal (typically germanium) contained in modular graphite canisters. These modules exhibit good thermal conductivity and low parasitic mass, and they are physically and chemically stable. Prototype modules have survived over 600 melt/freeze cycles without degradation. Advanced concepts to further improve performance are described. These concepts include the selection of ternary eutectic alloys to provide a wider range of useful melting temperatures and the use of infiltration to control the location of liquid alloy and to compensate for differences in thermal expansion. 13 refs., 18 figs.

Lauf, R.J.; Hamby, C. Jr.

1990-12-01T23:59:59.000Z

442

Mobile Ad Hoc Data Networks for Emergency Preparedness Telecommunications - Dynamic Power-Conscious Routing Concepts  

E-Print Network (OSTI)

this report, we focus on the Network Layer operation of routing and implications of power consumption for emergency MANETs. We discuss the bene#ts of power consciousness and conduct an initial investigation on the e#ects of energy-e#cient wireless routing in MANETs. We develop an initial dynamic power-conscious routing scheme #minimum power routing - MPR# that incorporates physical layer and link layer statistics to conservepower, while compensating for the propagation path loss, shadowing and fading e#ects, and interference environment at the intended receiver. The main idea of MPR is to select the path between a given source and destination that will require the least amount of total power expended, while still maintaining an acceptable signal-to-noise ratio #SNR# at each receiver. A #cost" function is assigned to every link re#ecting the transmitter power required to reliably communicate on that link. Routing decisions and cost updates are made based on feedback or information extracted from the received signal and special control packets. As an initial approach, we use the distributed Bellman-Ford algorithm to perform #shortest" path routing with the cost functions as the link distances. The resulting #shortest path" is the MPR path from a given source to a destination. We compare the performance of MPR to the common routing protocols of shortest distance routing with power control #SD-PC# and minimum hop routing with power control #MH-PC#, and present our preliminary results

Madhavi W. Subbarao

2000-01-01T23:59:59.000Z

443

Dynamical polarization in pionic atoms  

SciTech Connect

Dynamical nuclear polarization occurs in pionic atoms when a nuclear excitation of appropriate multipolarity is nearly degenerate with de-excitation of a pion atomic level. This phenomenon has been studied in several nuclei, one goal being to test the pion optical potential for pion atomic states normally ''hidden'' because of pion absorption. We find that, in addition to Coulomb mixing of the atomic and nuclear levels, strong interaction mixing and nuclear excitations above the lowest collective quadrupole mode are important for understanding the experimental results. All cases except /sup 110/Pd can then be understood. For /sup 110/Pd, additional nuclear structure information is needed to determine whether or not the conventional pion optical potential will suffice again. We discuss the sensitivity of dynamical polarization measurements to the parameters of the optical potential and to various aspects of nuclear structure. In particular, we find that pionic /sup 150/Sm provides a test of the interacting boson model and that the difference in neutron and proton radii predicted by Hartree-Fock calculations affects the mixing appreciably.

Dubach, J.F.; Moniz, E.J.; Nixon, G.D.

1979-08-01T23:59:59.000Z

444

Radiation in molecular dynamic simulations  

DOE Green Energy (OSTI)

Hot dense radiative (HDR) plasmas common to Inertial Confinement Fusion (ICF) and stellar interiors have high temperature (a few hundred eV to tens of keV), high density (tens to hundreds of g/cc) and high pressure (hundreds of Megabars to thousands of Gigabars). Typically, such plasmas undergo collisional, radiative, atomic and possibly thermonuclear processes. In order to describe HDR plasmas, computational physicists in ICF and astrophysics use atomic-scale microphysical models implemented in various simulation codes. Experimental validation of the models used to describe HDR plasmas are difficult to perform. Direct Numerical Simulation (DNS) of the many-body interactions of plasmas is a promising approach to model validation but, previous work either relies on the collisionless approximation or ignores radiation. We present a new numerical simulation technique to address a currently unsolved problem: the extension of molecular dynamics to collisional plasmas including emission and absorption of radiation. The new technique passes a key test: it relaxes to a blackbody spectrum for a plasma in local thermodynamic equilibrium. This new tool also provides a method for assessing the accuracy of energy and momentum exchange models in hot dense plasmas. As an example, we simulate the evolution of non-equilibrium electron, ion, and radiation temperatures for a hydrogen plasma using the new molecular dynamics simulation capability.

Glosli, J; Graziani, F; More, R; Murillo, M; Streitz, F; Surh, M

2008-10-13T23:59:59.000Z

445

Dynamical symmetry breaking in geometrodynamics  

E-Print Network (OSTI)

We are going to analyze through a first order perturbative formulation the local loss of symmetry when a source of electromagnetic and gravitational field interacts with an agent that perturbes the original geometry associated to the source. As the symmetry in Abelian or even non-Abelian field structures in four dimensional Lorentzian spacetimes is displayed through the existence of local planes of symmetry that we previously called blades one and two, the loss of symmetry will be manifested by the tilting of these planes under the influence of the external agent. In this strict sense the original local symmetry will be lost. But we will prove that the new blades at the same point will correspond after the tilting generated by perturbation to a new symmetry. The point of this note is to prove that the geometrical manifestation of local gauge symmetries is dynamic. The local original symmetries will be lost, nonetheless new symmetries will arise. There is a dynamic evolution of local symmetries.

Alcides Garat

2013-06-03T23:59:59.000Z

446

Reaction Dynamics with Exotic Beams  

E-Print Network (OSTI)

We review the new possibilities offered by the reaction dynamics of asymmetric heavy ion collisions, using stable and unstable beams. We show that it represents a rather unique tool to probe regions of highly Asymmetric Nuclear Matter ($ANM$) in compressed as well as dilute phases, and to test the in-medium isovector interaction for high momentum nucleons. The focus is on a detailed study of the symmetry term of the nuclear Equation of State ($EOS$) in regions far away from saturation conditions but always under laboratory controlled conditions. Thermodynamic properties of $ANM$ are surveyed starting from nonrelativistic and relativistic effective interactions. In the relativistic case the role of the isovector scalar $\\delta$-meson is stressed. The qualitative new features of the liquid-gas phase transition, "diffusive" instability and isospin distillation, are discussed. The results of ab-initio simulations of n-rich, n-poor, heavy ion collisions, using stochastic isospin dependent transport equations, are analysed as a function of beam energy and centrality. The isospin dynamics plays an important role in all steps of the reaction, from prompt nucleon emissions to the final fragments. The isospin diffusion is also of large interest, due to the interplay of asymmetry and density gradients. In relativistic collisions, the possibility of a direct study of the covariant structure of the effective nucleon interaction is shown. Results are discussed for particle production, collective flows and iso-transparency. Perspectives of further developments of the field, in theory as well as in experiment, are presented.

V. Baran; M. Colonna; V. Greco; M. Di Toro

2004-12-15T23:59:59.000Z

447

Radiative Impact of Ozone on Temperature Predictability in a Coupled Chemistry–Dynamics Data Assimilation System  

Science Conference Proceedings (OSTI)

The objective of this study is to investigate the impact on temperature forecast of using ozone analyses for the computation of heating rates in a three-dimensional variational data assimilation (3D-Var) system with a coupled model. The system is ...

J. de Grandpré; R. Ménard; Y. J. Rochon; C. Charette; S. Chabrillat; A. Robichaud

2009-02-01T23:59:59.000Z

448

GAS-PHASE MOLECULAR DYNAMICS: VIBRATIONAL DYNAMICS OF POLYATOMIC MOLECULES  

SciTech Connect

The goal of this research is the understanding of elementary chemical and physical processes important in the combustion of fossil fuels. Interest centers on reactions and properties of short-lived chemical intermediates. High-resolution, high-sensitivity, laser absorption methods are augmented by high-temperature, flow-tube reaction kinetics studies with mass-spectrometric sampling. These experiments provide information on the energy levels, structures and reactivity of molecular free radical species and, in turn, provide new tools for the study of energy flow and chemical bond cleavage in radicals involved in chemical systems. The experimental work is supported by theoretical studies using time-dependent quantum wavepacket calculations, which provide insight into energy flow among the vibrational modes of polyatomic molecules and interference effects in multiple-surface dynamics.

MUCKERMAN,J.T.

1999-06-09T23:59:59.000Z

449

Gas-Phase Molecular Dynamics: Vibrational Dynamics of Polyatomic Molecules  

SciTech Connect

The goal of this research is the understanding of elementary chemical and physical processes important in the combustion of fossil fuels. Interest centers on reactions and properties of short-lived chemical intermediates. High-resolution, high-sensitivity, laser absorption methods are augmented by high- temperature, flow-tube reaction kinetics studies with mass-spectrometic sampling. These experiments provide information on the energy levels, structures and reactivity of molecular free radical species and in turn, provide new tools for the study of energy flow and chemical bond cleavage in the radicals involved in chemical systems. The experimental work is supported by theoretical studies using time-dependent quantum wavepacket calculations, which provide insight into energy flow among the vibrational modes of polyatomic molecules and interference effects in multiple-surface dynamics.

Muckerman, J.T.

1999-05-21T23:59:59.000Z

450

Dynamic Evolution for Risk-Neutral Densities  

E-Print Network (OSTI)

We solved the scaled formulation for problems (7) and (10) and obtained the dynamic evolution for the densities (see Figure 1). For this data set, we.

451

Ultrafast Dynamics of Pyrrolidinium Ionic Liquids  

NLE Websites -- All DOE Office Websites (Extended Search)

Ultrafast Dynamics of Pyrrolidinium Cation Ionic Liquids Hideaki Shirota, Alison M. Funston, James F. Wishart, Edward W. Castner, Jr. J. Chem. Phys. 122, 184512 (2005). Find paper...

452

Microstructure and Dynamic Deformation Behavior of Nanometer ...  

Science Conference Proceedings (OSTI)

Dynamic deformation behavior at strain rates of around 103 s-1 was performed using split Hopkinson bar technique. The results show that, the flow stress ...

453

Understanding the Dynamic Indentation Behaviour of Metallic ...  

Science Conference Proceedings (OSTI)

In contrast, the dynamic indentation hardness behaviour of metallic materials, characterized by ultra-high strain rate plastic deformation under adiabatic ...

454

A Dynamic Platform for Runtime Adaptation  

E-Print Network (OSTI)

We present a middleware platform for assembling pervasive applications that demand fault-tolerance and adaptivity in distributed, dynamic environments. Unlike typical adaptive middleware approaches, in which sophisticated ...

Pham, Hubert

455

Available Technologies: Dynamic Solar Glare Blocking System  

Dynamic Solar Glare Blocking System IB-2415. APPLICATIONS OF TECHNOLOGY: ... U.S. DEPARTMENT OF ENERGY • OFFICE OF SCIENCE • UNIVERSITY OF CALIFORNIA.

456

Continuous Dynamic Constrained Optimisation – The Challenges  

E-Print Network (OSTI)

May 24, 2012 ... cs.bham.ac.uk). Abstract: Many real-world dynamic problems have constraints, and in certain cases not only the objective function changes ...

457

EMSL: Science: Biological Interactions and Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

Biological Interactions and Dynamics Cryo-transmission electron microscope image of Shewanella oneidensis MR-1. Understanding and optimizing the response of organisms and...

458

On the Dynamic Stability of Electricity Markets  

E-Print Network (OSTI)

Electricity market models have become an indispensable tool for analyzing and pre- dicting the impact of diverse dynamic drivers (e.g., weather, load, fuel prices  ...

459

Mathematical modeling of irreversible dynamic deformation, micro...  

National Nuclear Security Administration (NNSA)

proceed in deformable solids under intensive dynamic loading, consist of mechanical, thermal and structural ones, which correlate themselves. The structural processes involve the...

460

Optimal control of leukemic cell population dynamics  

E-Print Network (OSTI)

Sep 5, 2013 ... This issue can be formulated as an optimal control problem. The dynamics of leukemic cell populations in culture is given by age-structured ...

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


461

Convergence and Perturbation Resilience of Dynamic String ...  

E-Print Network (OSTI)

Jun 1, 2012 ... Optimization Online. Convergence and Perturbation Resilience of Dynamic String-Averaging Projection Methods. Yair Censor(yair ***at*** ...

462

The Dynamics of Moonlighting in Pakistan  

E-Print Network (OSTI)

of Sciences and Technology, Pakistan January 2011 10945 LeDynamics of Moonlighting in Pakistan Asma Hyder and Ather18 March, 2010 Islamabad, Pakistan Institute of Development

Hyder, Asma; Ahmed, Ather Maqsood

2011-01-01T23:59:59.000Z

463

NREL: Continuum Magazine - Sustainability through Dynamic Energy...  

NLE Websites -- All DOE Office Websites (Extended Search)

Magazine - Clean Energy Innovation at NREL Search Home About Archives Subscribe Sustainability through Dynamic Energy Management Issue 4 Print Version Share this resource...

464

Molecular Dynamics of Martenstic Phase Transitions  

Science Conference Proceedings (OSTI)

Presentation Title, Kinetics of martensitic phase transformation: Molecular Dynamics of Martenstic ... A Comparison of Coulombic and Plastic Shear Faults in Ice.

465

MML Leads Discussion of Dynamic Fracture Testing  

Science Conference Proceedings (OSTI)

Dynamic Fracture in Steel. ... More recently, the pipeline industry has been adopting the CTOA ... fatigue characteristics of new pipeline steels, as these ...

2012-10-15T23:59:59.000Z

466

Quantum relaxation dynamics using Bohmian trajectories  

Science Conference Proceedings (OSTI)

We present a new Bohmian trajectory based treatment of quantum dynamics suitable for dissipative systems. Writing the density matrix in complex-polar form

Jeremy B. Maddox; Eric R. Bittner

2001-01-01T23:59:59.000Z

467

A Recursive Lagrangian Formulation of Manipulator Dynamics  

E-Print Network (OSTI)

An efficient Lagrangian formulation of manipulator dynamics has been developed. The efficiency derives from recurrence relations for the velocities, accelerations, and generalized forces. The number of additions and ...

Hollerbach, John M.

1980-06-01T23:59:59.000Z

468

Fiscal Year 1994 progress in implementing Section 120 of the Comprehensive Environmental Rresponse, Compensation, and Liability Act. Eighth annual report to Congress  

Science Conference Proceedings (OSTI)

Congress passed the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) (Public Law 96-510), commonly known as Superfund, in 1980. The Superfund Amendments and Reauthorization Act (SARA) (Public Law 99-499), which amended CERCLA in 1986, added Section 120 regarding the cleanup of contaminated sites at Federal facilities. Under Section 120(e)(5) of CERCLA, each department, agency, or instrumentality of the Federal government responsible for compliance with Section 120 must submit an annual report to Congress concerning its progress in implementing the requirements of Section 120. The report must include information on the progress in reaching Interagency Agreements (IAGs), conducting Remedial Investigation and Feasibility Studies (RI/FSs), and performing remedial actions. Federal agencies that own or operate facilities on the National Priorities List (NPL) are required to begin an RI/FS for these facilities within 6 months after being placed on the NPL. Remediation of these facilities is addressed in an IAG between the Federal agency, the U.S. Environmental Protection Agency (EPA), and in some instances the state within which the facility is located. This report, prepared by the U.S. Department of Energy`s (DOE`s) Office of Environmental Management, is being submitted to Congress in accordance with Section 120(e)(5) of CERCLA. It is DOE`s Eighth Annual Report to Congress and provides information on DOE`s progress in implementing CERCLA Section 120 in Fiscal Year 1994 (FY 94), i.e., from October 1, 1993, to September 30, 1994. In this report the words {open_quotes}site{close_quotes} and {open_quotes}facility{close_quotes} are used interchangeably.

NONE

1995-07-01T23:59:59.000Z

469

Dynamic Response Analysis of Underground Powerhouse Structures Considering Coupling Effects of Hydraulic Impulse and Dynamic Loads  

Science Conference Proceedings (OSTI)

When accident takes place in hydropower generator units, they transit from normal working condition to accident working condition. During this period, the generator pier structures bear coupling effect of dynamic load from the units and hydraulic impulse ... Keywords: underground powerhouse structure, unit dynamic load, hydraulic impulse, coupling effect, dynamic analysis

Li Xiaoli; Yuan Chaoqing; Li Ke; Li Yujie

2012-05-01T23:59:59.000Z

470

Stability boundary analysis of the dynamic voltage restorer in weak systems with dynamic loads  

Science Conference Proceedings (OSTI)

In this contribution, a stability analysis for a dynamic voltage restorer (DVR) connected to a weak ac system containing a dynamic load is presented using continuation techniques and bifurcation theory. The system dynamics are explored through the continuation ... Keywords: DVR, Floquet multiplier, active filter, continuation techniques, iterative map, point common coupling, power converter, stability regions, switching process

Juan Segundo-Ramírez; Aurelio Medina; Arindam Ghosh; Gerard Ledwich

2012-06-01T23:59:59.000Z

471

Compensated amorphous silicon solar cell  

SciTech Connect

An amorphous silicon solar cell including an electrically conductive substrate, a layer of glow discharge deposited hydrogenated amorphous silicon over said substrate and having regions of differing conductivity with at least one region of intrinsic hydrogenated amorphous silicon. The layer of hydrogenated amorphous silicon has opposed first and second major surfaces where the first major surface contacts the electrically conductive substrate and an electrode for electrically contacting the second major surface. The intrinsic hydrogenated amorphous silicon region is deposited in a glow discharge with an atmosphere which includes not less than about 0.02 atom percent mono-atomic boron. An improved N.I.P. solar cell is disclosed using a BF.sub.3 doped intrinsic layer.

Devaud, Genevieve (629 S. Humphrey Ave., Oak Park, IL 60304)

1983-01-01T23:59:59.000Z

472

Dispersion-compensated Fresnel lens  

DOE Patents (OSTI)

A transmission grating is used to reduce chromatic aberration in a Fresnel lens, wherein the lens chromatic dispersion is offset and substantially canceled by the grating's diffraction-induced dispersion. The grating comprises a Fresnel-type pattern of microscopic facets molded directly into the lens surface. The facets would typically have a profile height of around 4[times]10[sup [minus]5] inch and a profile width of at least 10[sup [minus]3] inch. In its primary intended application, the invention would function to improve the optical performance of a Fresnel lens used to concentrate direct sunlight. 10 figs.

Johnson, K.C.

1992-11-03T23:59:59.000Z

473

Compensated intruder-detection systems  

DOE Patents (OSTI)

Intruder-detection systems in which intruder-induced signals are transmitted through a medium also receive spurious signals induced by changes in a climatic condition affecting the medium. To combat this, signals received from the detection medium are converted to a first signal. The system also provides a reference signal proportional to climate-induced changes in the medium. The first signal and the reference signal are combined for generating therefrom an output signal which is insensitive to the climatic changes in the medium. An alarm is energized if the output signal exceeds a preselected value. In one embodiment, an acoustic cable is coupled to a fence to generate a first electrical signal proportional to movements thereof. False alarms resulting from wind-induced movements of the fence (detection medium) are eliminated by providing an anemometer-driven voltage generator to provide a reference voltage proportional to the velocity of wind incident on the fence. An analog divider receives the first electrical signal and the reference signal as its numerator and denominator inputs, respectively, and generates therefrom an output signal which is insensitive to the wind-induced movements in the fence.

McNeilly, David R. (Maryville, TN); Miller, William R. (Andersonville, TN)

1984-01-01T23:59:59.000Z

474

Stealth Compensation via Retirement Benefits  

E-Print Network (OSTI)

financial planning, home-security systems, club memberships,to apartments, planes, cars, home-security services, andfinancial planning, and a home-security system. Another

Fried, Jesse M.

2004-01-01T23:59:59.000Z

475

Compensation 2 How to Enroll  

E-Print Network (OSTI)

provisions New enrollments, change in contribu- tion rate and percentage allocation between TIAA from Prior Employer's Plan Accepted Accepted Not accepted Loans Available through TIAA-CREF Available through TIAA-CREF Not available Hardship Withdrawals Not available Available to satisfy "immediate

Scherer, Norbert F.

476

Compensation 2 How to Enroll  

E-Print Network (OSTI)

allocation between TIAA-CREF and Vanguard, and termination of participation may be made either online during through TIAA-CREF Available through TIAA-CREF Not available Hardship Withdrawals Not available Available available through TIAA-CREF "Unforeseeable emergency" requirement difficult to satisfy; does not include

Scherer, Norbert F.

477

Compensation | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure...

478

Compensated intruder-detection systems  

DOE Patents (OSTI)

The invention is an improvement to an intruder-detection system of the kind where intruder-induced signals are transmitted through a medium whose conductance varies with certain climatic conditions. The improved system includes means coupled to the medium for converting the intruder-induced signals received therefrom to a first electrical signal. Means also are provided for generating a reference signal proportional to the climate-induced changes in the signal-conductance of the medium. Means are provided for generating, from the first electrical signal and the reference signal, an electrical output signal which is unaffected by the changes in signal-conductance. Means are provided to give warning when the output signal exceeds a selected value. In another aspect, the invention is a method for operating an intruder-detection system of the kind wherein an intrusion-generated signal transmitted through a detection medium is converted to a first electrical signal. The first electrical signal contains variations resulting from climate-induced changes in the medium. The method of the invention comprises generating an electrical reference signal proportional to the climate-induced changes in the medium; conditioning the first signal with the reference signal to produce an electrical output signal which is unaffected by the climate-induced changes in the medium; and impressing the resulting output signal across an alarm circuit to actuate the same when the output signal exceeds a selected value.

McNeilly, D.R.; Miller, W.R.

1982-01-20T23:59:59.000Z

479

Stealth Compensation via Retirement Benefits  

E-Print Network (OSTI)

under Section 162(m) of the Internal Revenue Code, defer thetax liability by $40. Internal Revenue Code, sec. 402(g)(1)(note 22, at 181–185. Internal Revenue Code sec. 1 Internal

Fried, Jesse M.

2004-01-01T23:59:59.000Z

480

ORNL DAAC for Biogeochemical Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

Home Home Welcome about us image About Us Provides detailed information about the ORNL DAAC. projects image About Data Lists the data products available from the ORNL DAAC. access image Get Data Guides you through the steps needed to acquire the data. tools image Data Tools Some tools to help you work with the data. uso image Help Need assistance? Our staff is happy to help. ORNL DAAC The Oak Ridge National Laboratory Distributed Active Archive Center (ORNL DAAC) for biogeochemical dynamics is one of the National Aeronautics and Space Administration (NASA) Earth Observing System Data and Information System (EOSDIS) data centers managed by the Earth Science Data and Information System (ESDIS) Project. The ORNL DAAC archives data produced by NASA's Terrestrial Ecology Program. The DAAC provides data and information

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481

Dynamical failure of Turing patterns  

E-Print Network (OSTI)

The emergence of stable disordered patterns in reactive system on spatially homogenous substrate is studied in the context of vegetation patterns in the semi-arid climatic zone. It is shown that reaction-diffusion systems that allow for Turing instability may exhibit heterogeneous "glassy" steady state, with no characteristic wavelength, if the diffusion rate associated with the "slow" reactant is very small. Upon decreasing the diffusion constant of the slow reactant three phases are identified: strong diffusion yields a stable homogenous phase, intermediate diffusion implies Turing (crystal like) patterns while in the slow diffusion limit the glassy state is the generic stable solution. In this disordered phase the dynamics is of crucial importance, with strong differences between local and global initiation.

Alon Manor; Nadav M. Shnerb

2005-08-08T23:59:59.000Z

482

Quantum dynamics in dual spaces  

Science Conference Proceedings (OSTI)

Quantum mechanics gives us information about spectra of dynamical variables and transition rates including scattering cross sections. They can be exhibited as spectral information in analytically continued spaces and their duals. Quantum mechanics formulated in these generalized spaces is used to study scattering and time evolution. It is shown that the usual asymptotic condition is inadequate to deal with scattering of composite or unstable particles. Scattering theory needs amendment when the interacting system is not isospectral with the free Hamiltonian, and the amendment is formulated. Perturbation theory in generalized spaces is developed and used to study the deletion and augmentation of the spectrum of the Hamiltonian. A complete set of algebraically independent constants for an interacting system is obtained. The question of the breaking of time symmetry is discussed.

Sudarshan, E.C.G.

1993-12-31T23:59:59.000Z

483

Fluid dynamics of bacterial turbulence  

E-Print Network (OSTI)

Self-sustained turbulent structures have been observed in a wide range of living fluids, yet no quantitative theory exists to explain their properties. We report experiments on active turbulence in highly concentrated 3D suspensions of Bacillus subtilis and compare them with a minimal fourth-order vector-field theory for incompressible bacterial dynamics. Velocimetry of bacteria and surrounding fluid, determined by imaging cells and tracking colloidal tracers, yields consistent results for velocity statistics and correlations over two orders of magnitude in kinetic energy, revealing a decrease of fluid memory with increasing swimming activity and linear scaling between energy and enstrophy. The best-fit model parameters allow for quantitative agreement with experimental data.

Jörn Dunkel; Sebastian Heidenreich; Knut Drescher; Henricus H. Wensink; Markus Bär; Raymond E. Goldstein

2013-02-21T23:59:59.000Z

484

Efficiency of the dynamical mechanism  

E-Print Network (OSTI)

The most extreme starbursts occur in galaxy mergers, and it is now acknowledged that dynamical triggering has a primary importance in star formation. This triggering is due partly to the enhanced velocity dispersion provided by gravitational instabilities, such as density waves and bars, but mainly to the radial gas flows they drive, allowing large amounts of gas to condense towards nuclear regions in a small time scale. Numerical simulations with several gas phases, taking into account the feedback to regulate star formation, have explored the various processes, using recipes like the Schmidt law, moderated by the gas instability criterion. May be the most fundamental parameter in starbursts is the availability of gas: this sheds light on the amount of external gas accretion in galaxy evolution. The detailed mechanisms governing gas infall in the inner parts of galaxy disks are discussed.

F. Combes

2004-11-15T23:59:59.000Z

485

Shock dynamics of phase diagrams  

E-Print Network (OSTI)

A thermodynamic phase transition denotes a drastic change of state of a physical system due to a continuous change of thermodynamic variables, as for instance pressure and temperature. The classical van der Waals equation of state is the simplest model that predicts the occurrence of a critical point associated with the gas-liquid phase transition. Nevertheless, below the critical temperature, theoretical predictions of the van der Waals theory significantly depart from the observed physical behaviour. We develop a novel approach to classical thermodynamics based on the solution of Maxwell relations for a generalised family of nonlocal entropy functions. This theory provides an exact mathematical description of discontinuities of the order parameter within the phase transition region, it explains the universal form of the equations of state and the occurrence of triple points in terms of the dynamics of nonlinear shock wave fronts.

Antonio Moro

2013-07-29T23:59:59.000Z

486

Reaction Dynamics with Exotic Beams  

E-Print Network (OSTI)

We review the new possibilities offered by the reaction dynamics of asymmetric heavy ion collisions, using stable and unstable beams. We show that it represents a rather unique tool to probe regions of highly Asymmetric Nuclear Matter ($ANM$) in compressed as well as dilute phases, and to test the in-medium isovector interaction for high momentum nucleons. The focus is on a detailed study of the symmetry term of the nuclear Equation of State ($EOS$) in regions far away from saturation conditions but always under laboratory controlled conditions. Thermodynamic properties of $ANM$ are surveyed starting from nonrelativistic and relativistic effective interactions. In the relativistic case the role of the isovector scalar $\\delta$-meson is stressed. The qualitative new features of the liquid-gas phase transition, "diffusive" instability and isospin distillation, are discussed. The results of ab-initio simulations of n-rich, n-poor, heavy ion collisions, using stochastic isospin dependent transport equations, are ...

Baran, V; Greco, V; Di Toro, M

2004-01-01T23:59:59.000Z

487

Microtubule catastrophe from protofilament dynamics  

E-Print Network (OSTI)

The disappearance of the guanosine triphosphate (GTP)-tubulin cap is widely believed to be the forerunner event for the growth-shrinkage transition (`catastrophe') in microtubule filaments in eukaryotic cells. We study a discrete version of a stochastic model of the GTP cap dynamics, originally proposed by Flyvbjerg, Holy and Leibler (Flyvbjerg, Holy and Leibler, Phys. Rev. Lett. 73, 2372, 1994). Our model includes both spontaneous and vectorial hydrolysis, as well as dissociation of a non-hydrolyzed dimer from the filament after incorporation. In the first part of the paper, we apply this model to a single protofilament of a microtubule. A catastrophe transition is defined for each protofilament, similar to the earlier one-dimensional models, the frequency of occurrence of which is then calculated under various conditions, but without explicit assumption of steady state conditions. Using a perturbative approach, we show that the leading asymptotic behavior of the protofilament catastrophe in the limit of large growth velocities is remarkably similar across different models. In the second part of the paper, we extend our analysis to the entire filament by making a conjecture that a minimum number of such transitions are required to occur for the onset of microtubule catastrophe. The frequency of microtubule catastrophe is then determined using numerical simulations, and compared with analytical/semi-analytical estimates made under steady state/quasi-steady state assumptions respectively for the protofilament dynamics. A few relevant experimental results are analyzed in detail, and compared with predictions from the model. Our results indicate that loss of GTP cap in 2-3 protofilaments is necessary to trigger catastrophe in a microtubule.

Jemseena V.; Manoj Gopalakrishnan

2013-08-27T23:59:59.000Z

488

Idealized Test Cases for Dynamical Core Experiments  

E-Print Network (OSTI)

Idealized Test Cases for Dynamical Core Experiments Christiane Jablonowski (University of Michigan-13/2006 #12;Motivation · Test cases for 3D dynamical cores on the sphere ­ are hard to find in the literature groups ­ lack standardized & easy-to-use analysis techniques · Idea: Establish a collection of test cases

Jablonowski, Christiane

489

Spin dynamics in (110)-oriented quantum wells  

Science Conference Proceedings (OSTI)

Quantum structures of III-V semiconductors grown on (110)-oriented substrates are promising for spintronic applications because they allow us to engineer and control spin dynamics of electrons. We summarise the theoretical ideas, which are the basis ... Keywords: Quantum wells, Spin dynamics, Spintronics

R. T. Harley; O. Z. Karimov; M. Henini

2006-12-01T23:59:59.000Z

490

Dynamic detection of nuclear reactor core incident  

Science Conference Proceedings (OSTI)

Surveillance, safety and security of evolving systems are a challenge to prevent accident. The dynamic detection of a hypothetical and theoretical blockage incident in the Phenix nuclear reactor is investigated. Such an incident is characterized by abnormal ... Keywords: Contrast, Dynamic detection of perturbations, Evolving system, Fast-neutron reactor, Neighbourhood, Noise

Laurent Hartert; Danielle Nuzillard; Jean-Philippe Jeannot

2013-02-01T23:59:59.000Z

491

NON-LINEAR DYNAMICS IDENTIFICATION USING  

E-Print Network (OSTI)

to be identified and extracted from the data. The above work is applied to a real physical wind turbine data 143 5 Case Study: Identification of Wind Turbine Dynamics Using Gaussian Processes 145 5 Turbine Dynamics 147 5.3.1 About the Data 148 5.3.2 Cleaning Up Raw Data (Phase 1) 152 5.3.3 Nonlinear

Duffy, Ken

492

Carbon and Nitrogen Dynamics in Agricultural Soils  

E-Print Network (OSTI)

Carbon and Nitrogen Dynamics in Agricultural Soils Model Applications at Different Scales in Time Print: SLU Service/Repro, Uppsala 2012 #12;Carbon and Nitrogen Dynamics in Agricultural Soils. Model Applications at Different Scales in Time and Space Abstract An understanding of soil organic carbon (C

493

Dynamic substructure method for elastic fractal structures  

Science Conference Proceedings (OSTI)

We investigate the fractal properties on the distribution of natural frequencies of elastic structures. We use the multi-level-multi-scale dynamic substructure method so that we need only to eliminate a few nodes in advancing a fractal level. We shall ... Keywords: Dynamic condensation, Elastic fractal structures, Frequency power laws, Multi-level-multi-scale

A. Y. T. Leung

2011-02-01T23:59:59.000Z

494

Dynamic Pricing and Learning in Electricity Markets  

Science Conference Proceedings (OSTI)

We analyze the price-formation process in an infinite-horizon oligopoly model where hydroelectric generators engage in dynamic price-based competition. The analysis focuses on the role of "indifference" prices, i.e., prices that equate the gains from ... Keywords: Dynamic auctions, Economics, Games: stochastic, Natural resources: energy, Noncooperative, Restructured electricity markets, Water resources

Alfredo Garcia; Enrique Campos-Nañez; James Reitzes

2005-03-01T23:59:59.000Z

495

Quantifying Dynamic Stability of Genetic Memory Circuits  

Science Conference Proceedings (OSTI)

Bistability/Multistability has been found in many biological systems including genetic memory circuits. Proper characterization of system stability helps to understand biological functions and has potential applications in fields such as synthetic biology. ... Keywords: Dynamic stability, genetic memory, gene circuit, dynamic noise margin.

Yong Zhang; Peng Li; Garng Huang

2012-05-01T23:59:59.000Z

496

Brain dynamics promotes function Carlos Lourenco  

E-Print Network (OSTI)

dynamics? At this point in brain research, we are happy if we can at least provide a partial answer. Key. Natural scientists look for correlations between measured electrical signals and behavior or mental states by considering the so-called dynamical complex- ity as revealed e.g. by the measurement of the brain's electrical

497

Module Allocation for Dynamically Reconfigurable Systems  

Science Conference Proceedings (OSTI)

The synthesis of dynamically reconfigurable systems poses some new challenges for high-level synthesis tools. In this paper, we deal with the task of module allocation as this step has a direct influence on the performance of the dynamically reconfigudreasbiglne. ...

Xue-Jie Zhang; Kam-Wing Ng

2000-05-01T23:59:59.000Z

498

MATHEMATICS Price dynamics in political prediction markets  

E-Print Network (OSTI)

- gate the price dynamics of prediction markets with the goal of developing methods to identify the trulyAPPLIED MATHEMATICS POLITICAL SCIENCES Price dynamics in political prediction markets Saikat Ray City, IA 52242; and d Department Chemical and Biological Engineering, Northwestern University, Evanston

Amaral, Luis A.N.

499

Dynamic field theory and embodied communication  

Science Conference Proceedings (OSTI)

Dynamical Field Theory is a neurally based approach to embodied and situated cognition, in which information is represented in continuous activation fields defined over metric spaces. The temporal evolution of activation patterns under the influence ... Keywords: embodied cognition, modelling, neural dynamics, turn taking

Yulia Sandamirskaya; Gregor Schöner

2006-04-01T23:59:59.000Z

500

Chemical mechanical planarization operation via dynamic programming  

Science Conference Proceedings (OSTI)

In this paper, the impact on non-planarization index by the down force and rotational speed during a SiO"2 or Cu CMP process was investigated. Since the magnitudes of down force and rotational speed have limits, we choose the dynamic programming approach ... Keywords: Chemical mechanical planarization, Copper dishing, Dynamic programming, Non-planarization index, Oxide erosion

Chia-Shui Lin; Yung-Chou Lee

2007-12-01T23:59:59.000Z