Powered by Deep Web Technologies
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.


1

E-Print Network 3.0 - advanced var compensators Sample Search...  

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

self- commutated... describing the use of reactive power compensators implemented with new static VAR technologies are also... described. I.- INTRODUCTION VAR compensation is ......

2

Subsynchronous torsional interactions with static VAR compensators; Influence of HVDC  

SciTech Connect (OSTI)

Planning for installation of a static var compensator (SVC) in Chester, Maine, was initiated in 1987. The pre-specification subsynchronous torsional interaction (SSTI) studies showed the SVC might have a negative influence on stability of torsional modes of vibration of the nearby turbine-generators. In a previous paper, the parameters influencing the level of SSTI were identified with the use of a simple system. This paper extends the work to power systems containing an HVDC transmission system. The combined effect of SVC and HVDC on turbine-generator SSTI is investigated with the use of a hypothetical system. Simulation plots for the large machines of New Brunswick and Maine are included to quantify the level of interaction with the Chester SVC. Filtering as a mitigation measure is proposed to eliminate the small level of SSTI attributed to the Chester SVC.

Rostamkolai, N.; Piwko, R.J.; Larsen, E.V. (General Electric Co., Schenectady, NY (USA)); Fisher, D.A. (New England Power Service Co., Westborough, MA (USA)); Mobarak, M.A. (New Brunswick Electric Power Commission, Fredericton, NB (Canada)); Poitras, A.E. (Maine Electric Power Co., Augusta, ME (US))

1991-02-01T23:59:59.000Z

3

STATIC VAR COMPENSATOR CONTROL USING A QUANTIZED CONTROLLER FOR A TWO AREA MULTI-MACHINE SYSTEM  

E-Print Network [OSTI]

Compensators (SVC) control to enhance the damping of the power-swing. The test system used is a two area multiSTATIC VAR COMPENSATOR CONTROL USING A QUANTIZED CONTROLLER FOR A TWO AREA MULTI-MACHINE SYSTEM-machine system. A severe disturbance is introduced into the power system and the quantized controller controlled

Wilamowski, Bogdan Maciej

4

Capacitor-Less VAR Compensator Based on a Matrix Converter  

E-Print Network [OSTI]

greatly contributed to the completion of this work. I owe my gratitude to them for always believing in me and helping me through my academic pursuit. vii NOMENCLATURE VAR Volt-ampere reactive MC 3-phase ac-to-3-phase ac matrix converter v1... [10] ...... 12 10 Equivalent circuit of a capacitor................................................................. 13 11 Basic layout of a 3/3 MC............................................................................ 16 12 Block diagram...

Balakrishnan, Divya Rathna

2012-02-14T23:59:59.000Z

5

THE IMPACT OF GENERATION MIX ON PLACEMENT OF STATIC VAR COMPENSATORS  

E-Print Network [OSTI]

THE IMPACT OF GENERATION MIX ON PLACEMENT OF STATIC VAR COMPENSATORS Robert H. Lasseter, Fellow to provide the maximum transfer capability for all possible generation mixes. The margin to low voltage limit bus system will be used to demonstrate this method over a wide range of generation patterns. Keywords

6

THE IMPACT OF GENERATION MIX ON PLACEMENT OF STATIC VAR COMPENSATORS  

E-Print Network [OSTI]

THE IMPACT OF GENERATION MIX ON PLACEMENT OF STATIC VAR COMPENSATORS Robert H. Lasseter, Fellow to provide maximum transfer capability for all possible generation mixes. The margin to low voltage limit. The IEEE 24 bus system will be used to demonstrate this method over a wide range of generation patterns

7

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

SciTech Connect (OSTI)

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]

array connected to the batteries through a maximum power point tracker. This combined topology make Terms--Active filters, multilevel systems, solar power generation, static var compensators (SVCs). I

Catholic University of Chile (Universidad Católica de Chile)

9

Decidability Results for Dynamic Installation of Compensation Handlers  

E-Print Network [OSTI]

that in a simple -like calculus with static compen- sations the termination of a process is decidable Zavattaro Focus Team, University of Bologna & INRIA, Italy Abstract. Dynamic compensation installation compensations, showing that process termination is decidable for parallel and replacing compensations while

Paris-Sud XI, Université de

10

Dynamic performance of static and synchronous compensators at an HVDC inverter bus in a very weak AC system  

SciTech Connect (OSTI)

This paper discusses the performance of dynamic voltage control devices at the inverters of very weak ac systems. The types of compensation considered are: (a) static var compensator (SVC), (b) synchronous compensator (SC), (c) a mix of the two and (d) fixed capacitors. Although the primary purpose of these compensators is to control voltage at the ac bus, their dynamic performance during system disturbances is a very important factor. The investigation includes the behavior of the various voltage control options under ac and dc disturbances. The paper shows that the SVC has the fastest response for load rejection type of overvoltages, but can cause serious problems with recovery during undervoltages caused by single phase faults. The CIGRE benchmark model for HVdc control studies has been modified and used in this study. In particular the effect of local load has been included.

Nayak, O.B.; Gole, A.M. (Univ. of Manitoba, Winnipeg (Canada)); Chapman, D.G.; Davies, J.B. (Manitoba Hydro, Winnipeg (Canada))

1994-08-01T23:59:59.000Z

11

Efficient Dynamic Spectrum Sharing Through Rate Compensation and Spectrum Handoff  

E-Print Network [OSTI]

Abstract--In this work, we propose a heuristic for dynamic spectrum sharing in cognitive radio networks licensed channels available for opportunistic spectrum access. Each SU is equipped with n wEfficient Dynamic Spectrum Sharing Through Rate Compensation and Spectrum Handoff Adisorn

Paris-Sud XI, Université de

12

Coherent-feedback quantum control with a dynamic compensator  

E-Print Network [OSTI]

I present an experimental realization of a coherent-feedback control system that was recently proposed for testing basic principles of linear quantum stochastic control theory [M. R. James, H. I. Nurdin and I. R. Petersen, to appear in IEEE Transactions on Automatic Control (2008), arXiv:quant-ph/0703150v2]. For a dynamical plant consisting of an optical ring-resonator, I demonstrate ~ 7 dB broadband disturbance rejection of injected laser signals via all-optical feedback with a tailored dynamic compensator. Comparison of the results with a transfer function model pinpoints critical parameters that determine the coherent-feedback control system's performance.

Hideo Mabuchi

2008-03-13T23:59:59.000Z

13

advanced static var: Topics by E-print Network  

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

energies Intermittent power: less predictable, less observable, less: Phase Shifting Transformers, Static Var Compensators Long distance HVAC underground cables with reactive...

14

Adaptive all-order dispersion compensation of ultrafast laser pulses using dynamic spectral holography  

E-Print Network [OSTI]

Adaptive all-order dispersion compensation of ultrafast laser pulses using dynamic spectral-1396 Received 14 July 1999; accepted for publication 24 September 1999 The time-varying dispersion of ultrafast laser pulses can be self-adaptively stabilized using real-time dynamic spectral holography

Nolte, David D.

15

Puddle Dynamics and Air-to-Fuel Ratio Compensation for Gasoline-Ethanol Blends in  

E-Print Network [OSTI]

1 Puddle Dynamics and Air-to-Fuel Ratio Compensation for Gasoline-Ethanol Blends in Flex flexible fuel vehicles (FFVs) can operate on a blend of gasoline and ethanol in any concentration of up for gasoline-ethanol blends is, thus, necessary for the purpose of air-to-fuel ratio control. In this paper, we

Stefanopoulou, Anna

16

ENERGY-BASED LIMIT CYCLE COMPENSATION FOR DYNAMICALLY BALANCING WHEELED INVERTED PENDULUM MACHINES  

E-Print Network [OSTI]

ENERGY-BASED LIMIT CYCLE COMPENSATION FOR DYNAMICALLY BALANCING WHEELED INVERTED PENDULUM MACHINES are not well known. The effects of these non-linearities can be observed in the energy behavior of IP balancing. While in this paper we use an energy-based observer to detect and correct limit cycles while balancing

Dollar, Aaron M.

17

Capacitor Voltage Control in a Cascaded Multilevel Inverter as a Static Var Generator  

E-Print Network [OSTI]

1 Capacitor Voltage Control in a Cascaded Multilevel Inverter as a Static Var Generator M. Li, J. N for a cascaded multilevel inverter to be used for static var compensation. Index Terms-- Multilevel Inverter, Static Var Generator (SVG), Cascade inverter. I. INTRODUCTION Multilevel inverters have gained much

Tolbert, Leon M.

18

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

19

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

20

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

E-Print Network [OSTI]

, distributed generation (DG), D-STATCOM, reactive power margin, wind turbine. I. INTRODUCTION URRENTLY for the enhancement of dynamic voltage stability in distribution networks with distributed wind generation results showing the effects of composite load on voltage dynamics in the distribution network through

Pota, Himanshu Roy

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

Analog and digital dynamic compensation techniques for delayed self-powered neutron detectors  

SciTech Connect (OSTI)

This paper reports on analog and digital methods developed to compensate for the time delay associated with rhodium self-powered neutron detector signals. This delay is caused by the decay of the neutron-activated rhodium and results in a current signal with unfavorable time response characteristics. The compensating analog method is based on the use of lead-lag networks to eliminate undesirable poles and zeros. The digital method takes digitized signals and numerically solves the inverse kinetics equation that relates reactor flux to the detector current at all earlier times. These methods were tested in a realistic reactor environment, and the results illustrate the accuracy achieved using each method.

Yusuf, S.O.; Wehe, D.K. (Univ. of Michigan, Dept. of Nuclear Engineering, Ann Arbor, MI (US))

1990-12-01T23:59:59.000Z

22

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

SciTech Connect (OSTI)

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)] [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Nayak, O.B. [HVDC Research Centre, Winnipeg, Manitoba (Canada)] [HVDC Research Centre, Winnipeg, Manitoba (Canada); Turanli, H.M. [Manitoba Hydro, Winnipeg, Manitoba (Canada)] [Manitoba Hydro, Winnipeg, Manitoba (Canada)

1996-04-01T23:59:59.000Z

23

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

24

Comprehensive functional testing and dynamic compensation techniques for Cellular Neural Networks  

E-Print Network [OSTI]

is an analog computer that has the capability to solve a first order differential equation as is often required for spatial filtering operations in image processing applications. Each cell in the array is identical and is connected only to it's nearest... The first order nonlinear differential equation defining the dynamics of a cellular neural network cell can be written as follows [I]: C ' = ? ' + g A(i j;)r, l)y& &(r)+ g B(i j;k, l)u&&+I (la) [C()r, l)e)v(i j ) ' C(k, l)aV(i j ) y' j(r) (~xij (r)+l~ )ij...

Grimaila, Michael Russell

1995-01-01T23:59:59.000Z

25

Static reactive power compensators for high-voltage power systems. Final report  

SciTech Connect (OSTI)

A study conducted to summarize the role of static reactive power compensators for high voltage power system applications is described. This information should be useful to the utility system planning engineer in applying static var systems (SVS) to high voltage as (HVAC) systems. The static var system is defined as a form of reactive power compensator. The general need for reactive power compensation in HVAC systems is discussed, and the static var system is compared to other devices utilized to provide reactive power compensation. Examples are presented of applying SVS for specific functions, such as the prevention of voltage collapse. The operating principles of commercially available SVS's are discussed in detail. The perormance and active power loss characteristics of SVS types are compared.

Not Available

1981-04-01T23:59:59.000Z

26

Friction Problems in Servomechanisms: Modeling and Compensation Techniques  

E-Print Network [OSTI]

Friction Problems in Servomechanisms: Modeling and Compensation Techniques Jan Tommy Gravdahl of this presentation Introduction Friction models 1. Static models 2. Models with time delay 3. Dynamic models Friction compensation 1. Non-model based compensation 2. Compensation based on static friction models 3

Gravdahl, Jan Tommy

27

New synchronous compensators for the Nelson River HVDC system; Planning requirements and specifications  

SciTech Connect (OSTI)

The first units of Limestone Generating Station, the third plant on the Lower Nelson River in northern Manitoba, will come into service in the fall of 1990. Additional var compensation equipment is required at the inverter end of the Nelson River HVdc system to accommodate power from Limestone. This paper describes the system requirements of and the overall specification for the synchronous compensators selected to supply the reactive power and voltage support.

Thio, C.V.; Davies, J.B. (Manitoba Hydro, Winnipeg, Manitoba (CA))

1991-04-01T23:59:59.000Z

28

Power Factor Compensation (PFC) Power Factor Compensation  

E-Print Network [OSTI]

Power Factor Compensation (PFC) Power Factor Compensation The power factor (PF) is defined as the ratio between the active power and the apparent power of a system. If the current and voltage are periodic with period , and [ ), then the active power is defined by ( ) ( ) (their inner product

Knobloch,Jürgen

29

Compensation Techniques in Accelerator Physics  

SciTech Connect (OSTI)

Accelerator physics is one of the most diverse multidisciplinary fields of physics, wherein the dynamics of particle beams is studied. It takes more than the understanding of basic electromagnetic interactions to be able to predict the beam dynamics, and to be able to develop new techniques to produce, maintain, and deliver high quality beams for different applications. In this work, some basic theory regarding particle beam dynamics in accelerators will be presented. This basic theory, along with applying state of the art techniques in beam dynamics will be used in this dissertation to study and solve accelerator physics problems. Two problems involving compensation are studied in the context of the MEIC (Medium Energy Electron Ion Collider) project at Jefferson Laboratory. Several chromaticity (the energy dependence of the particle tune) compensation methods are evaluated numerically and deployed in a figure eight ring designed for the electrons in the collider. Furthermore, transverse coupling optics have been developed to compensate the coupling introduced by the spin rotators in the MEIC electron ring design.

Hisham Kamal Sayed

2011-05-31T23:59:59.000Z

30

Abstract--The U.S. power industry is under great pressure to provide reactive power or Var support. Although it is generally  

E-Print Network [OSTI]

Abstract--The U.S. power industry is under great pressure to provide reactive power or Var support to provide local reactive power support, a thorough quantitative investigation of the economic benefit reactive power compensation. This paper investigates the benefits including reduced losses, shifting

Tolbert, Leon M.

31

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

32

aspergillus usamii var: Topics by E-print Network  

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

The artificial wetlands created through taro (Colocasia esculenta var. antiquorum) cultivation have played an important Reed, Michael 29 The development of RAPD and...

33

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

34

Energy Employees Occupational Illness Compensation Program Act...  

Energy Savers [EERE]

Tracking Database, INL Energy Employees' Occupational Illness Compensation Program LM Records Handling System (LMRHS01) - Energy Employees Occupational Illness Compensation...

35

Enenrgy Employees Occupational Illness Compensation Program Act...  

Energy Savers [EERE]

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

36

Energy Employees' Occupational Illness Compensation Program Act...  

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

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

37

Reactive-power compensation of coal mining excavators by using a new-generation STATCOM  

SciTech Connect (OSTI)

This paper deals with the development and implementation of a current-source-converter-based static synchronous compensator (CSC-STATCOM) applied to the volt-ampere-reactive (VAR) compensation problem of coal mining excavators. It is composed of a +/- 750-kVAR full-bridge CSC with selective harmonic elimination, a low-pass input filter tuned to 200 Hz, and a Delta/Y-connected coupling transformer for connection to medium-voltage load bus. Each power semiconductor switch is composed of an asymmetrical integrated gate commutated thyristor (IGCT) connected in series with a reverse-blocking diode and switched at 500 Hz to eliminate 5th, 7th, 11th, and 13th current harmonics produced by the CSC. Operating principles, power stage, design of dc link, and input filter are also described in this paper. It has been verified by field tests that the developed STATCOM follows rapid fluctuations in nearly symmetrical lagging and leading VAR consumption of electric excavators, resulting in nearly unity power factor on monthly basis, and the harmonic current spectra in the lines of CSC-STATCOM at the point of common coupling comply with the IEEE Standard 519-1992.

Bilgin, H.F.; Ermis, M.; Kose, K.N.; Cadirci, I.; Acik, A.; Demirci, T.; Terciyanli, A.; Kocak, C.; Yorukoglu, M. [TUBITAK Information Technology & Electronic Research Institute, Ankara (Turkey)

2007-01-15T23:59:59.000Z

38

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

39

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

40

Theory versus experimental results and comparisons for five orifice-compensated hybrid bearing configurations  

E-Print Network [OSTI]

). . . . . . 16 Static Loader (Kurtin, et al. , 1991). . . . . . . . . . . . . 17 Dynamic Excitation (Childs, Hale, and Rouvas, 1991). . . . . 18 Hydrostatic Bearing (Rowe, 1983) Pressure Distribution for an Orifice-Compensated Circular Hydrostatic Pad (Rowe... hydrostatic bearing, shown in Fig. 12, is an externally pressurized journal bearing which employs compensation (i. e. , flow restriction) devices to pro- vide both stability and load support for the journal. This compensation is accomplished by injecting a...

Franchek, Nancy Marie

1992-01-01T23:59:59.000Z

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.


41

Motion Compensation Via Redundant-Wavelet Multihypothesis  

E-Print Network [OSTI]

-based implementation. Index Terms-- multihypothesis motion compensation, redun- dant wavelet transform, phaseMotion Compensation Via Redundant-Wavelet Multihypothesis James E. Fowler, Senior Member, IEEE, Suxia Cui, Member, IEEE, and Yonghui Wang, Member, IEEE Abstract-- Multihypothesis motion compensation

Fowler, James E.

42

ORO Energy Employees Occupational Illness Compensation Program...  

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

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

43

Port Compensation Using the Herschel/SPIRE Imaging Fourier Transform Spectrometer  

E-Print Network [OSTI]

Port Compensation Using the Herschel/SPIRE Imaging Fourier Transform Spectrometer Locke D. Spencer the position of zero optical path difference (ZPD). The process of port compensation involves a broadband spectral source placed at the second, complementary input port of an FTS, reducing the dynamic range

Naylor, David A.

44

A Method for Evaluating Volt-VAR Optimization Field Demonstrations  

SciTech Connect (OSTI)

In a regulated business environment a utility must be able to validate that deployed technologies provide quantifiable benefits to the end-use customers. For traditional technologies there are well established procedures for determining what benefits will be derived from the deployment. But for many emerging technologies procedures for determining benefits are less clear and completely absent in some cases. Volt-VAR Optimization is a technology that is being deployed across the nation, but there are still numerous discussions about potential benefits and how they are achieved. This paper will present a method for the evaluation, and quantification of benefits, for field deployments of Volt-VAR Optimization technologies. In addition to the basic methodology, the paper will present a summary of results, and observations, from two separate Volt-VAR Optimization field evaluations using the proposed method.

Schneider, Kevin P.; Weaver, T. F.

2014-08-31T23:59:59.000Z

45

Compensation 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 between the input interface and the output interface, an inductive element between the input interface and the energy conversion module, and a control module. The control module determines a compensated duty cycle control value for operating the energy conversion module to produce a desired voltage at the output interface and operates 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. The compensated duty cycle control value is influenced by the current through the inductive element and accounts for voltage across the switching elements of the energy conversion module.

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

2013-11-19T23:59:59.000Z

46

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

47

Perks and Culture Competitive compensation  

E-Print Network [OSTI]

utilities add a layer of digital intelligence to their grids. These smart grids use sensors, meters, digitalPerks and Culture Competitive compensation Merit raises and performance bonuses 401(k) plan with company match and immediate vesting Employee Stock Purchase Plan (ESPP) Health coverage and wellness

Ghosh, Joydeep

48

Perks and Culture Competitive compensation  

E-Print Network [OSTI]

Perks and Culture · Competitive compensation · Tuition reimbursement and training · Merit raises devices. · Safety Systems: In addition to controlling a process, safety of plants is critical. We develop reducing costs and minimiz- ing safety and environmental risks. We're seeking high-impact people, true

Ghosh, Joydeep

49

Bonded, walk-off compensated optical elements  

DOE Patents [OSTI]

A bonded, walk-off compensated crystal, for use with optical equipment, and methods of making optical components including same.

Ebbers, Christopher A. (Livermore, CA)

2003-04-08T23:59:59.000Z

50

Noise Compensation for Subspace Gaussian Mixture Models  

E-Print Network [OSTI]

Noise Compensation for Subspace Gaussian Mixture Models Liang Lu University of Edinburgh Joint work condition (i.e. noise), the gain disappears Goal Noise compensation for SGMM Method Model space compensation . . .· · · · · · · · · · ·· · ·· · ···· · ·· · ·· vjk Liang Lu, Interspeech, September, 2012 R T S C R T S C #12;Noise compensation Larger modelling

Edinburgh, University of

51

E-Print Network 3.0 - anisopliae var anisopliae Sample Search...  

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

Sciences and Ecology 2 Abstract A genetic variant of the entomopathogenic fungus Metarhizium anisop-liae var. anisopliae, isolated from a soil in Alberta, Canada, from...

52

E-Print Network 3.0 - anisopliae var acridum Sample Search Results  

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

fungus Summary: fungus Metarhizium anisopliae var. acridum Susan C. ENTZ1 , Dan L. JOHNSON1 and Lawrence M. KAWCHUK2 1... ; accepted 1 July 2005. The entomopathogenic fungus...

53

Charge amplifier with bias compensation  

DOE Patents [OSTI]

An ion beam uniformity monitor for very low beam currents using a high-sensitivity charge amplifier with bias compensation. The ion beam monitor is used to assess the uniformity of a raster-scanned ion beam, such as used in an ion implanter, and utilizes four Faraday cups placed in the geometric corners of the target area. Current from each cup is integrated with respect to time, thus measuring accumulated dose, or charge, in Coulombs. By comparing the dose at each corner, a qualitative assessment of ion beam uniformity is made possible. With knowledge of the relative area of the Faraday cups, the ion flux and areal dose can also be obtained.

Johnson, Gary W. (Livermore, CA)

2002-01-01T23:59:59.000Z

54

Compensation issues tough to navigate  

SciTech Connect (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

55

Compensation | National Nuclear Security Administration  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to User Group and UserofProteinNewsat NERSC#N/AaCompensation |

56

Theory of enthalpy-entropy compensation  

SciTech Connect (OSTI)

The ubiquitous nature of enthalpy-entropy compensation calls for a general model. The present model, which is formulated with compensation in ion exchange in mind, is an extension of an older general approach in that the molar fractions of the species that are exchanged in the process enter explicitly. In a different way, it is an extension to the theory of conformal solutions, which only leads to compensation under the condition of conformity. The present model allows one to decide from experiment whether interactions between exchanging species or interactions with third species (or external fields) are responsible for the compensation effect.

Boots, H.M.J.; de Bokx, P.K. (Philips Research Labs., Eindhoven (Netherlands))

1989-12-14T23:59:59.000Z

57

Japanese Ratify Convention on Supplementary Compensation for...  

Office of Environmental Management (EM)

liability regime that will assure prompt and meaningful compensation in the event of a nuclear accident and will facilitate international cooperation on nuclear projects such as...

58

Dispersion compensation for attosecond electron pulses  

SciTech Connect (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

59

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

E-Print Network [OSTI]

state and assimilated indirect observational data such as satellite radiance without trans- forming themA Penalized 4-D Var data assimilation method for reducing forecast error M. J. Hossen Department dimensional variational (4D-Var) Data Assimilation (DA) method is used to find the optimal initial conditions

Navon, Michael

60

The Impact of Background Error on Incomplete Observations for 4D-Var Data Assimilation with  

E-Print Network [OSTI]

The Impact of Background Error on Incomplete Observations for 4D-Var Data Assimilation with the FSU on the 4D- Var data assimilation, twin experiments were carried out with the dy- namical core of the new is also investigated. Keywords: Data assimilation, incomplete observations, background error. 1

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.


61

Human Resource Management: Employee Compensation Guide  

E-Print Network [OSTI]

Human Resource Management: Employee Compensation Guide Risk Management *Extension Agricultural Economist, Kansas State University Agricultural Experiment Station and Cooperative Extension Service; and Extension Program Specialist III.... ?Employee Compensation and Job Satisfaction on Dairy Farms in the Northeast.? April 1999. Cornell University, RB99-02. Kansas Department of Human Resources. Kansas Wage Survey, 1996 Edition. Rosenberg, Howard. ?Labor Management Decisions.? University...

Fogleman, Sarah L.; McCorkle, Dean

2009-04-08T23:59:59.000Z

62

C-Myc Induced Compensated Cardiac Hypertrophy Increases Free...  

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

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

63

Policy Flash 2014-29 Acquisition Letter 07 - Benchmark Compensation...  

Office of Environmental Management (EM)

Letter 07 - Benchmark Compensation Amount for Individual Executive Salary Actions Policy Flash 2014-29 Acquisition Letter 07 - Benchmark Compensation Amount for Individual...

64

POLICY FLASH 2014-15 Determination of Benchmark Compensation...  

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

of Benchmark Compensation Amount for Certain Executives and Employees (Update) POLICY FLASH 2014-15 Determination of Benchmark Compensation Amount for Certain Executives...

65

POLICY FLASH 2014-15 Determination of Benchmark Compensation...  

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

5 Determination of Benchmark Compensation Amount for Certain Executives and Employees POLICY FLASH 2014-15 Determination of Benchmark Compensation Amount for Certain Executives and...

66

POLICY GUIDANCE MEMORANDUM #11A Approval Process for Dual Compensation...  

Office of Environmental Management (EM)

1A Approval Process for Dual Compensation Waivers for Reemployed Annuitants POLICY GUIDANCE MEMORANDUM 11A Approval Process for Dual Compensation Waivers for Reemployed Annuitants...

67

A COGNITIVE COMPENSATION MECHANSIM FOR DEFORMABLE ANTENNAS  

E-Print Network [OSTI]

This thesis presents the design, theory, and measurement of a linearly polarized microstrip patch antenna with a novel substrate-integrated mechanism that can compensate the detuning effects from a physical deformation. Specifically, this antenna...

Long, Stephen A.

2010-07-14T23:59:59.000Z

68

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

E-Print Network [OSTI]

is replaced by a large wind power plant which can have adverse effects on the stability and dynamic natureVoltage Stability and Power Quality Issues of Wind Farm with Series Compensation T. F. Orchi in DIgSILENT PowerFactory environment. From the simulation results, it is found that using a SC with wind

Pota, Himanshu Roy

69

Gain Scheduling Control Design of an Erbium-Doped Fibre Amplifier by Pump Compensation  

E-Print Network [OSTI]

Gain Scheduling Control Design of an Erbium-Doped Fibre Amplifier by Pump Compensation Min Ding amplifier's (EDFA's) dynamics. We demonstrate a gain scheduling scheme on a PID controller that minimizes- pensation. The scheduled controller requires only three easily accessible parameters: the total input power

Pavel, Lacra

70

Multipurpose active/passive motion compensation system  

SciTech Connect (OSTI)

A microprocessor-controlled active/passive motion compensation system has been developed for deploying a variety of geotechnical in-situ testing devices with mobile drilling rigs from low-cost service vessels. The light-weight rotary heave compensator incorporates a hydraulic motor as the compensator actuator and a servo-controlled closed loop pump to reduce the air storage and power requirements. Unique features of the system are the use of inertial sensors to measure three components of boat motion, the ability to run the system in active/passive or passive modes, and the ability to automatically lower the drillstring at a constant velocity while maintaining motion compensation. Quantitative measurements made during sea trials offshore California yielded motion compensation accuracy approaching 98 percent which is much better than the compensation achieved with passive systems. Results are presented from offshore in-situ testing with a cone penetrometer, a vane shear device, and a suspension PS logger. The system can also be used for other offshore applications.

Sullivan, R.A.; Clements, R.E.; Davenport, M.R.

1984-05-01T23:59:59.000Z

71

Endophyte Microbiome Diversity in Micropropagated Atriplex canescens and Atriplex torreyi var griffithsii  

E-Print Network [OSTI]

Endophyte Microbiome Diversity in Micropropagated Atriplex canescens and Atriplex torreyi var to diverse fungal and bacterial taxa. Culturing isolated some seed borne endophyte taxa which could, Cooke P, Dowd S, Sun S (2011) Endophyte Microbiome Diversity in Micropropagated Atriplex canescens

72

VarPetrRef 1 VARIETY AND THE EVOLUTION OF REFINERY PROCESSING  

E-Print Network [OSTI]

VarPetrRef 1 VARIETY AND THE EVOLUTION OF REFINERY PROCESSING Phuong NGUYEN*, Pier-Paolo SAVIOTTI, refinery processes, variety, niche theory, Weitzman measure. JEL classification : L15 -L93 -O3 1

Paris-Sud XI, Université de

73

Method for mask repair using defect compensation  

DOE Patents [OSTI]

A method for repair of amplitude and/or phase defects in lithographic masks. The method involves modifying or altering a portion of the absorber pattern on the surface of the mask blank proximate to the mask defect to compensate for the local disturbance (amplitude or phase) of the optical field due to the defect.

Sweeney, Donald W. (San Ramon, CA); Ray-Chaudhuri, Avijit K. (Livermore, CA)

2001-01-01T23:59:59.000Z

74

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 beam 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 is positioned co-axial 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 shutters 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.

1993-08-31T23:59:59.000Z

75

In situ magnetic compensation for potassium spin-exchange relaxation-free magnetometer considering probe beam pumping effect  

SciTech Connect (OSTI)

A novel method to compensate the residual magnetic field for an atomic magnetometer consisting of two perpendicular beams of polarizations was demonstrated in this paper. The method can realize magnetic compensation in the case where the pumping rate of the probe beam cannot be ignored. In the experiment, the probe beam is always linearly polarized, whereas, the probe beam contains a residual circular component due to the imperfection of the polarizer, which leads to the pumping effect of the probe beam. A simulation of the probe beam's optical rotation and pumping rate was demonstrated. At the optimized points, the wavelength of the probe beam was optimized to achieve the largest optical rotation. Although, there is a small circular component in the linearly polarized probe beam, the pumping rate of the probe beam was non-negligible at the optimized wavelength which if ignored would lead to inaccuracies in the magnetic field compensation. Therefore, the dynamic equation of spin evolution was solved by considering the pumping effect of the probe beam. Based on the quasi-static solution, a novel magnetic compensation method was proposed, which contains two main steps: (1) the non-pumping compensation and (2) the sequence compensation with a very specific sequence. After these two main steps, a three-axis in situ magnetic compensation was achieved. The compensation method was suitable to design closed-loop spin-exchange relaxation-free magnetometer. By a combination of the magnetic compensation and the optimization, the magnetic field sensitivity was approximately 4 fT/Hz{sup 1/2}, which was mainly dominated by the noise of the magnetic shield.

Fang, Jiancheng; Wang, Tao, E-mail: wangtaowt@aspe.buaa.edu.cn; Quan, Wei; Yuan, Heng; Li, Yang [School of Instrument Science and Opto-Electronics Engineering, Beihang University, Beijing 100191 (China); Zhang, Hong; Zou, Sheng [School of Instrument Science and Engineering, Southeast University, Nanjing 210096 (China)

2014-06-15T23:59:59.000Z

76

Effect of board independence on incentive compensation and compensation disclosure : evidence from Europe  

E-Print Network [OSTI]

My thesis examines how the lack of board-of-director independence affects the structure and disclosure of executive compensation. I find that European companies with more insiders on their boards grant their executives ...

Muslu, Volkan

2005-01-01T23:59:59.000Z

77

An analysis of agricultural education faculty compensation systems  

E-Print Network [OSTI]

, 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...

Wicks, Aaron-Marie

2002-01-01T23:59:59.000Z

78

Secondary Control for Voltage Unbalance Compensation in an Islanded Microgrid  

E-Print Network [OSTI]

coupling (PCC). Unbalance compensation is achieved by proper control of distributed generators (DGs unbalance. Keywords-distributed generation; microgrid; secondary control; voltage unbalance compensation I. INTRODUCTION Distributed Generators (DGs) may be connected individually to the utility grid or be integrated

Vasquez, Juan Carlos

79

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

80

Demonstration of Electrical Dispersion Compensation of Single Sideband Optical Transmission  

E-Print Network [OSTI]

Demonstration of Electrical Dispersion Compensation of Single Sideband Optical Transmission P. M describe a demonstration of electrical chromatic dispersion compensation of 10 Gb/s single sideband optical signals. Eye-opening and bit error rates of less than 10-10 were achieved after compensation of -2040 ps

Haddadi, Hamed

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

Operator Dependant Compensated Algorithms Philippe Langlois Nicolas Louvet  

E-Print Network [OSTI]

Operator Dependant Compensated Algorithms Philippe Langlois Nicolas Louvet DALI at ELIAUS, nicolas.louvet]@univ-perp.fr Abstract Compensated algorithms improve the accuracy of a re- sult evaluating a correcting term that compensates the finite precision of the computation. The implementation core

Louvet, Nicolas

82

The Inverse Kinetics Method and PID Compensation of the  

E-Print Network [OSTI]

The Inverse Kinetics Method and PID Compensation of the Annular Core Research Reactor by Benjamin Kinetics Method and PID Compensation of the Annular Core Research Reactor by Benjamin Garnas ABSTRACT Kinetics Method and PID Compensation of the Annular Core Research Reactor by Benjamin Garnas B.S. General

83

Self-Programmable PID Compensator for Digitally Controlled SMPS  

E-Print Network [OSTI]

Self-Programmable PID Compensator for Digitally Controlled SMPS Zhenyu Zhao and Aleksandar Prodi) that automatically adjusts parameters of PID compensator based on pre-specified bandwidth requirements. The PID at the corner frequency of the power stage. Then, the gain of the PID compensator is found from the oscillations

Prodiæ, Aleksandar

84

Magnetic Compensation in the Bimetallic Oxalates  

SciTech Connect (OSTI)

Bimetallic oxalates are layered molecule-based magnets with either ferromagnetic or antiferromagnetic interactions between transition metals M(II) and M'(III) on an open honeycomb lattice. Some Fe(II)Fe(III) bimetallic oxalates exhibit magnetic compensation (MC) at a compensation temperature Tcomp ? 30 K below the ferrimagnetic transition temperature Tc ? 45 K. To see if MC is possible in other bimetallic oxalates, we construct a theoretical model for bimetallic oxalates that exhibit antiferromagnetic interactions. By varying the M(II) and M'(III) average orbital angular momentum, which can be controlled by the choice of interlayer cations, we have found regions of MC in the families M(II)Mn(III) with M = Fe, Co, or Ni and V(II)M'(III) with M' = Cr or V but not in the family M(II)Ru(III) with M = Fe or Cu.

Reis, Peter L [ORNL; Fishman, Randy Scott [ORNL; Reboredo, Fernando A [ORNL; Moreno, Juana [University of North Dakota, Grand Forks

2008-01-01T23:59:59.000Z

85

VaR Constrained Hedging of Fixed Price Load-Following Obligations in Competitive  

E-Print Network [OSTI]

VaR Constrained Hedging of Fixed Price Load-Following Obligations in Competitive Electricity , and marketers at the prices determined by supply and demand equilibrium. Electricity mar- ket participants are exposed to risks in their net earnings due to uncertain wholesale market prices. Electricity market prices

86

Data Assimilation of Lightning in WRF 3/4-D VAR Using Observation Operators  

E-Print Network [OSTI]

@fsu.edu Abstract Compared to other types of satellite-derived data, assimilating lightning data into operationalData Assimilation of Lightning in WRF 3/4-D VAR Using Observation Operators Razvan S¸tefanescu1. The early stages of our research will utilize existing ground-based lightning data that can be assimilated

Navon, Michael

87

Optimal Inverter VAR Control in Distribution Systems with High PV Penetration  

E-Print Network [OSTI]

and the net benefits, taking into account the additional cost of inverter losses when operating at non systems. Solar energy is highly intermittent and this introduces several challenges to existing utility is to demonstrate the benefits of inverter var control on a fast timescale to mitigate rapid and large voltage

Low, Steven H.

88

Self-compensating tensiometer and method  

DOE Patents [OSTI]

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

89

Servomechanism compensating parameters solved by digital computer  

E-Print Network [OSTI]

of the compensated servomechan- ism will meet tne design specifications if its transfer func- tion locus on the Q p'ane at the design resonant frequoncy, mr, has a particular angle of slope, 8, and is located at a 12 particular point, P. (See Fig. g... ')) ?) = ee' /e'+ + ee/e[, / e')) ?) ~ meLmee )) )]. ()p) The values of A ( jmr) and B (j)2?) in terms of m, mb ~ oaf and ab car. be found b)) using equations 35, 36e 37 and 38. Thus A'( jm ) (/ajm + 1) lzj (/zjm + 1) j(+zm - f22) ) m (/ajm + 1)2 -1 m...

Scott, Eldon Duane

1957-01-01T23:59:59.000Z

90

Public comment re Convention on Supplementary Compensation on...  

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

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...

91

Forecasting Economic and Financial Variables with Global VARs  

E-Print Network [OSTI]

City, June 24-27, 2007 and at the Bank of England Research Workshop on Dynamic Factor Models held at the Bank of England, 8-10 October 2007. We are grateful for comments by the discussants James Stock and Domenico Giannone as well as to Frank Diebold... and Weiner, PSW, (2004), and further developed in Dees, di Mauro, Pesaran and Smith, DdPS, (2007), for answering some of these questions. We do so recognising that macroeconomic policy analysis and risk management need to take into account the increasing...

Pesaran, M Hashem; Schuermann, Til; Smith, L Vanessa

92

CONTAGION DES CRISES DE 1997 ET 2008 EN ASEAN+3: UN MODELE VAR STRUCTUREL  

E-Print Network [OSTI]

i CONTAGION DES CRISES DE 1997 ET 2008 EN ASEAN+3: UN MODELE VAR STRUCTUREL Marine Coupaud LAREFI possibilités d'analyses afin d'étudier l'impact de chocs monétaires et réels sur les pays de l'Asean. Cette étude vise à analyser les réactions des pays membres de l'Asean+3 face à des perturbations de grande

Paris-Sud XI, Université de

93

Parameter monitoring compensation system and method  

DOE Patents [OSTI]

A compensation system is described for a computer-controlled machining apparatus having a controller and including a cutting tool and a workpiece holder which are movable relative to one another along a preprogrammed path during a machining operation. It utilizes sensors for gathering information at a preselected stage of a machining operation relating to an actual condition. The controller compares the actual condition to a condition which the program presumes to exist at the preselected stage and alters the program in accordance with detected variations between the actual condition and the assumed condition. Such conditions may be related to process parameters, such as a position, dimension or shape of the cutting tool or workpiece or an environmental temperature associated with the machining operation, and such sensors may be a contact or a non-contact type of sensor or a temperature transducer. 7 figs.

Barkman, W.E.; Babelay, E.F.; DeMint, P.D.; Hebble, T.L.; Igou, R.E.; Williams, R.R.; Klages, E.J.; Rasnick, W.H.

1995-02-07T23:59:59.000Z

94

Dispersion compensation in chirped pulse amplification systems  

DOE Patents [OSTI]

A chirped pulse amplification system includes a laser source providing an input laser pulse along an optical path. The input laser pulse is characterized by a first temporal duration. The system also includes a multi-pass pulse stretcher disposed along the optical path. The multi-pass pulse stretcher includes a first set of mirrors operable to receive input light in a first plane and output light in a second plane parallel to the first plane and a first diffraction grating. The pulse stretcher also includes a second set of mirrors operable to receive light diffracted from the first diffraction grating and a second diffraction grating. The pulse stretcher further includes a reflective element operable to reflect light diffracted from the second diffraction grating. The system further includes an amplifier, a pulse compressor, and a passive dispersion compensator disposed along the optical path.

Bayramian, Andrew James; Molander, William A.

2014-07-15T23:59:59.000Z

95

Analysis of Redundant-Wavelet Multihypothesis for Motion Compensation  

E-Print Network [OSTI]

Analysis of Redundant-Wavelet Multihypothesis for Motion Compensation James E. Fowler Department, Mississippi Abstract An analysis is presented that examines multihypothesis motion-compensated video coding using a redundant wavelet transform to produce multiple predictions that are diverse in transform phase

Fowler, James E.

96

SUBMITTED TO JSAC, FEB. 2005 1 Distributed Interference Compensation for  

E-Print Network [OSTI]

SUBMITTED TO JSAC, FEB. 2005 1 Distributed Interference Compensation for Wireless Networks Jianwei Huang, Randall Berry, Michael L. Honig Abstract We consider a distributed power control scheme for wireless ad hoc networks, in which each user announces a price that reflects compensation paid by other

Kuzmanovic, Aleksandar

97

KALMAN FILTER WITH PHASE SPECTRUM COMPENSATION ALGORITHM FOR SPEECH ENHANCEMENT  

E-Print Network [OSTI]

KALMAN FILTER WITH PHASE SPECTRUM COMPENSATION ALGORITHM FOR SPEECH ENHANCEMENT Stephen So, Kamil K with a recent speech enhancement technique, called the phase spectrum compen- sation procedure, or PSC. More-- Kalman filter, phase spectrum compensation (PSC), speech enhancement 1. INTRODUCTION The Kalman filter

98

Compensated fragmentation processes and limits of dilated fragmentations  

E-Print Network [OSTI]

, informally, the explosion phenomenon can be prevented by a deterministic compensation. Specif- ically, the accumulation of small dislocations which would instantaneously shatter the mass into dust, is compensated, i.e. the dust. They are meant to describe the evolution of some measurable set with unit mass which

Paris-Sud XI, Université de

99

Fin Failure Compensation for an Unmanned Underwater Vehicle \\Lambda  

E-Print Network [OSTI]

Fin Failure Compensation for an Unmanned Underwater Vehicle \\Lambda Albert S.F. Cheng and Naomi on a torpedoshaped unmanned underwater vehicle (UUV) and design control laws to compensate for a fin that gets Island, is an unmanned underwater vehicle (UUV) representative of a class of UUV designed to have

Leonard, Naomi

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

Compensation for thermal effects in mirrors of Gravitational Wave Interferometers  

E-Print Network [OSTI]

In this paper we study several means of compensating for thermal lensing which, otherwise, should be a source of concern for future upgrades of interferometric detectors of gravitational waves. The methods we develop are based on the principle of heating the cold parts of the mirrors. We find that thermal compensation can help a lot but can not do miracles. It seems finally that the best strategy for future upgrades (``advanced configurations'') is maybe to use thermal compensation together with another substrate materials than Silica, for example Sapphire.

P. Hello

2001-04-18T23:59:59.000Z

102

Solenoid Compensation for the SuperB Interaction Region  

SciTech Connect (OSTI)

We present an approach for compensating adverse effects of the detector solenoid in the SuperB Interaction Region (IR). We place compensating solenoids around the IR quadrupole magnets to reduce the magnetic fields nearly to zero. This allows more operational headroom for superconducting IR magnets and avoids saturation of ferric IR magnets. We place stronger compensating solenoids between IR magnets to reverse the magnetic field direction. This allows adjusting the total integrated solenoid field to zero, which eliminates coordinate plane rotation and reduces vertical beam displacements in the IR.

Bertsche, Kirk; /SLAC; Sullivan, Michael K.; /SLAC

2010-08-25T23:59:59.000Z

103

Friction Modeling and Compensation for an Industrial Robot  

E-Print Network [OSTI]

Friction Modeling and Compensation for an Industrial Robot Stephen M. Phillips and Kevin R. Ballou it is assumed to be unpredictable or insignificant. In experiments on the PUMA 560 robot arm, Armstrong' dem

104

Design and fabrication of pressure-compensating compliant tubes  

E-Print Network [OSTI]

Different fabrication methods are evaluated for producing pressure-compensating tubes for use in low-pressure drip irrigation systems. Such devices would allow drip irrigation systems to operate at driving pressures much ...

Martin, Ian (Ian P.)

2014-01-01T23:59:59.000Z

105

Team Identity and Performance-based Compensation Effects on Performance  

E-Print Network [OSTI]

). Results indicate that while the combination of team and individual performance-based compensation results in the highest performance, the incremental performance boost is higher from the first performance-based reward strategy, regardless of whether...

Blazovich, Janell L.

2010-01-16T23:59:59.000Z

106

A fast global optimization approach to VAR planning for the large scale electric power systems  

SciTech Connect (OSTI)

In this paper, an innovative fast global optimization technique, Hybrid Partial Gradient Descent/Simulated Annealing (HPGDSA), for optimal VAR planning is presented. The HPGDSA is introduced to search the global optimal solution considering both quality and speed at the same time. The basic idea of the HPGDSA is that partial gradient descent and simulated annealing alternate with each other such that it reduces the CPU time of the conventional Simulated Annealing (SA) method while retaining the main characteristics of SA, i.e., the ability to get the global optimal solution. The HPGDSA was applied to a practical power system, Taiwan Power System (Tai-Power System), with satisfactory results.

Liu, C.W.; Jwo, W.S.; Liu, C.C. [National Taiwan Univ., Taipei (Taiwan, Province of China). Dept. of Electrical Engineering; Hsiao, Y.T. [Tamkang Univ., Taipei (Taiwan, Province of China). Dept. of Electrical Engineering

1997-02-01T23:59:59.000Z

107

1D+4D-VAR data assimilation of lightning with WRFDA system using nonlinear observation operators  

E-Print Network [OSTI]

1 1D+4D-VAR data assimilation of lightning with WRFDA system using nonlinear observation operators of assimilating data from the Earth Networks Total Lightning Network (ENTLN) during two cases of severe weather Mapper (GLM). We use the Weather Research and Forecast (WRF) model and variational data assimilation

Navon, Michael

108

Non-smooth optimization in the 1D-Var data assimilation of all-sky infrared satellite observations  

E-Print Network [OSTI]

Non-smooth optimization in the 1D-Var data assimilation of all-sky infrared satellite observations of clear-sky data assimilation using infrared satellites is well understood (e.g. [8], [5]), and while of non-smooth optimization algorithms to improve the variational data assimilation of all-sky infrared

Navon, Michael

109

Optical caliper with compensation for specimen deflection and method  

DOE Patents [OSTI]

An optical non-contact profilometry system and method provided by an optical caliper with matched optical sensors that are arranged conjugate to each other so that the surface profile and thickness of an article can be measured without using a fixed reference surface and while permitting the article to deflect in space within the acquisition range of the optical sensors. The output signals from the two optical sensors are algebraically added to compensate for any such deflection of the article and provide a so compensated signal, the balance and sign of which provides a measurement of the actual thickness of the article at the optical sensors.

Bernacki, Bruce E. (Knoxville, TN)

1997-01-01T23:59:59.000Z

110

Optical caliper with compensation for specimen deflection and method  

DOE Patents [OSTI]

An optical non-contact profilometry system and method provided by an optical caliper with matched optical sensors that are arranged conjugate to each other so that the surface profile and thickness of an article can be measured without using a fixed reference surface and while permitting the article to deflect in space within the acquisition range of the optical sensors. The output signals from the two optical sensors are algebraically added to compensate for any such deflection of the article and provide a so compensated signal, the balance and sign of which provides a measurement of the actual thickness of the article at the optical sensors. 2 figs.

Bernacki, B.E.

1997-12-09T23:59:59.000Z

111

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 counting 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 compensated 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, Richard A. (Powell, TN)

1981-01-01T23:59:59.000Z

112

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

113

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

114

The Composition of Compensation Policy: From Cash to Fringe Benefits  

E-Print Network [OSTI]

in the design of incentives by employers. However, this issue has been surprisingly left aside of economic composition of the compensation policy with both monetary and nonmonetary incentives. We characterize over monetary and nonmonetary benefits is common knowledge to both parties, nonmonetary incentives

Paris-Sud XI, Universit de

115

Compensation-Aware Runtime Monitoring Christian Colombo1  

E-Print Network [OSTI]

of asynchronous log-based monitoring is sometimes adopted -- even though this implies that the system may proceed of compensations to enable the undoing of actions, thus enriching asyn- chronous monitoring with the ability The need for correctness of systems has driven research in different validation and ver- ification

Pace, Gordon J.

116

TIME OF FLIGHT MOTION COMPENSATION REVISITED J.M. Gottfried  

E-Print Network [OSTI]

is a mature technology, used in industrial applications like optical inspection, robot control for compensation of such errors have been proposed to date, but still lack a proper comparison. We bridge this gap of a light source modulated with the reference. This is done by sampling the correlation function between

Garbe, Christoph S.

117

Stiffness modeling of robotic manipulator with gravity compensator  

E-Print Network [OSTI]

to the stiffness modeling of a heavy industrial robot of the Kuka family. Key words: Stiffness modeling, gravity compensator, industrial robot. 1 Introduction Recently, in aerospace industry much attention is paid these requirements, industrial robots are more and more used to replace conventional CNC-machines, which are limited

Paris-Sud XI, Université de

118

A new blowdown compensation scheme for boiler leak detection  

E-Print Network [OSTI]

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

Marquez, Horacio J.

119

COLUMBIA UNIVERSITY Departmental Accident Report Form for Worker's Compensation Benefits  

E-Print Network [OSTI]

COLUMBIA UNIVERSITY Departmental Accident Report Form for Worker's Compensation Benefits EMPLOYEE___________ ACCIDENT DATA (to be completed by employee) Date of Injury_____/_____/____ Time of Injury the employee How did the injury or illness occur? (Describe fully the events that caused the accident) Describe

Jia, Songtao

120

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

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

School of Electrical, Computer and Energy Engineering PhD Final Oral Defense  

E-Print Network [OSTI]

are addressed, including static VAr compensators (SVCs), high voltage dc (HVDC) transmission lines, and phase

Zhang, Junshan

122

Junipers of the World 84 Key to Caribbean Junipers ( 5 species) (plus J. v. var. virginiana and rev. 2/2011  

E-Print Network [OSTI]

Junipers of the World 84 Key to Caribbean Junipers ( 5 species) (plus J. v. var. virginiana and rev-lobed), on coppice rocks or rocky summits, crowns pyramidal to round, Caribbean 8a. Glands on old brown persistent

Adams, Robert P.

123

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

124

MODIFICATION DE LA CHAMBRE DE COMPENSATION D'UN RESPIROMTRE A PRESSION CONSTANTE  

E-Print Network [OSTI]

MODIFICATION OF THE COMPENSATION CHAMBER OF A CONSTANT PRESSURE RESPIROMETER A change was madeNOTE MODIFICATION DE LA CHAMBRE DE COMPENSATION D'UN RESPIROM?TRE A PRESSION CONSTANTE Andrée PIHET compensation (appelée aussi fiole de référence) qui élimine les effets des changements barométriques et

Boyer, Edmond

125

On-Line Fault Detection and Compensation of Hydraulic Driven Machines Using Modelling Techniques  

E-Print Network [OSTI]

On-Line Fault Detection and Compensation of Hydraulic Driven Machines Using Modelling Techniques C purpose of hydraulic driven machines as well as for the compensation of incipient faults where applicable: Modelling, Simulation, Hydraulic motors, Fault detection, Fault Compensation 1. Introduction Model

Thawonmas, Ruck

126

BLIND COMPENSATION OF NONLINEAR DISTORTIONS VIA SPARSITY RECOVERY Leonardo T. Duarte1  

E-Print Network [OSTI]

BLIND COMPENSATION OF NONLINEAR DISTORTIONS VIA SPARSITY RECOVERY Leonardo T. Duarte1 , Ricardo.jutten@gipsa-lab.grenoble-inp.fr ABSTRACT In this work, we address the problem of compensating a non- linear memoryless system in a blind a representative set of experiments on synthetic data. Index Terms-- Blind compensation, nonlinear distortion

Paris-Sud XI, Universit de

127

Influence of compensator thickness, field size, and off-axis distance on the effective attenuation coefficient of a cerrobend compensator for intensity-modulated radiation therapy  

SciTech Connect (OSTI)

Intensity-modulated radiation therapy (IMRT) can be performed by using compensators. To make a compensator for an IMRT practice, it is required to calculate the effective attenuation coefficient (?{sub eff}) of its material, which is affected by various factors. We studied the effect of the variation of the most important factors on the calculation of the ?{sub eff} of the cerrobend compensator for 6-MV photon beams, including the field size, compensator thickness, and off-axis distance. Experimental measurements were carried out at 100 cm source-to-surface distance and 10 cm depth for the 6-MV photon beams of an Elekta linac using various field size, compensator thickness, and off-axis settings. The field sizes investigated ranged from 4 4 to 25 25 cm{sup 2} and the cerrobend compensator thicknesses from 0.56 cm. For a fixed compensator thickness, variation of the ?{sub eff} with the field size ranged from 3.76.8%, with the highest value attributed to the largest compensator thickness. At the reference field size of 10 10 cm{sup 2}, the ?{sub eff} varied by 16.5% when the compensator thickness was increased from 0.56 cm. However, the variation of the ?{sub eff} with the off-axis distance was only 0.99% at this field size, whereas for the largest field size, it was more significant. Our results indicated that the compensator thickness and field size have the most significant effect on the calculation of the compensator ?{sub eff} for the 6-MV photon beam. Therefore, it is recommended to consider these parameters when calculating the compensator thickness for an IMRT practice designed for these beams. The off-axis distance had a significant effect on the calculation of the ?{sub eff} only for the largest field size. Hence, it is recommended to consider the effect of this parameter only for field sizes larger than 25 25 cm{sup 2}.

Haghparast, Abbas [Department of Medical Physics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Islamic Republic of Iran (Iran, Islamic Republic of); Hashemi, Bijan, E-mail: bhashemi@modares.ac.ir [Department of Medical Physics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Islamic Republic of Iran (Iran, Islamic Republic of); Eivazi, Mohammad Taghi [Department of Medical Physics, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Islamic Republic of Iran (Iran, Islamic Republic of)

2013-04-01T23:59:59.000Z

128

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

129

Position control of a servopneumatic system using fuzzy compensation  

E-Print Network [OSTI]

Kinetic Plus Viscous Friction; (c) Static Plus Kinetic Plus Viscous Friction with Negative Viscous Friction (Source; Armstrong, 1991) . . . . . . . . . I 2 Fig. 3: Stribeck Friction - The Four Regimes of Friction (Source: Armstrong, 1991) . . . . 13 I... the results obtained with that from a more complex model based adaptive controller. D. Literature Review Armstrong et al. [3] presents a comprehensive survey of friction models, analysis tools and compensation methods for the control of machines...

Sathyanarayana, Sreenivas

2000-01-01T23:59:59.000Z

130

Comprehensive Environmental Response, Compensation, and Liability Act Requirements  

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

To establish and implement Department of Energy (DOE) Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) policies and procedures as prescribed by the National Oil and Hazardous Substance Pollution Contingency Plan (NCP) and under the authorities of Executive Order 12580 within the framework of the environmental programs established under doe 5400.1. Cancels DOE O 5480.14, DOE N 5400.4 and DOE N 5400.5. Canceled by DOE N 251.6.

1989-10-06T23:59:59.000Z

131

Matrix Effects in Biological Mass Spectrometry Imaging: Identification and Compensation  

SciTech Connect (OSTI)

Matrix effects in mass spectrometry imaging (MSI) may affect the observed molecular distribution in chemical and biological systems. In this study, we introduce an experimental approach that efficiently compensates for matrix effects in nanospray desorption electrospray ionization (nano-DESI) MSI without introducing any complexity into the experimental protocol. We demonstrate compensation for matrix effects in nano-DESI MSI of phosphatidylcholine (PC) in normal and ischemic mouse brain tissue by doping the nano-DESI solvent with PC standards. Specifically, we use mouse brain tissue of a middle cerebral artery occlusion (MCAO) stroke model with an ischemic region localized to one hemisphere of the brain. Due to similar suppression in ionization of endogenous PC molecules extracted from the tissue and PC standards added to the solvent, matrix effects are eliminated by normalizing the intensity of the sodium and potassium adducts of endogenous PC to the intensity of the corresponding adduct of the PC standard. This approach efficiently compensates for signal variations resulting from differences in the local concentrations of sodium and potassium in tissue sections and from the complexity of the extracted analyte mixture derived from local variations in molecular composition.

Lanekoff, Ingela T.; Stevens, Susan; Stenzel-Poore, Mary; Laskin, Julia

2014-07-21T23:59:59.000Z

132

Causality Analysis of Groundwater dynamics based on a Vector Autoregressive model in the semi-arid basin of Gundal (South India)  

E-Print Network [OSTI]

Causality Analysis of Groundwater dynamics based on a Vector Autoregressive model in the semi, time space analysis, causality, VAR model, semi-arid region 1. Introduction Large amounts of water. Abstract: Causal relationships existing between observed levels of groundwater in a semi-arid sub

133

Compensatory mechanisms in fish populations: Literature reviews: Volume 3, A critical review of mathematical models for fish compensation mechanisms: Final report  

SciTech Connect (OSTI)

A critical review of population dynamics models was performed to describe previous models and to recommend approaches for future research on compensation in fish population. The models were first classified into five categories, i.e., theoretical, stock-recruitment, biomass (bioenergetic), population (number), and life cycle functions. Models in each category were then reviewed for their formulations, assumptions, limitations, and performances. A majority of the models were found to have been formulated to calculate parameters that could not be directly measured. Models developed to evaluate entrainment and impingement impacts were often applied without validation against observed data. To advance the scientific understanding of fish compensation mechanisms, future research should include complimentary studies in both model development and empirical observation. Modeling will provide a theoretical framework to integrate individual compensation mechanisms and to relate them to population level responses. Empirical observation, on the other hand, will furnish data to verify the theory. The fish compensation model should use a cohort representation that allows the incorporation of the relationships between life cycle processes and environmental conditions. Growth and mortality of fish in early life stages should be related to weather, hydrology, temperature and food in addition to competition and predation. Environmental data with an inherent stochasticity should be used as input to produce verifiable real time variations in year class strength.

Chen, C.W.

1987-05-01T23:59:59.000Z

134

M. Flierl: Motion-Compensated Orthogonal Transforms for Multiview Video Coding, EURASIP EUSIPCO, Poznan, Poland, Sep. 2007. 1 MOTION-COMPENSATED ORTHOGONAL TRANSFORMS  

E-Print Network [OSTI]

of motion information. This is in contrast to the well known motion-compensated lifted wavelets where in time and view direction are cascaded. Motion-compensated lifted wavelets suffer from their motion. Well known examples are free viewpoint video [1] and free viewpoint television (FTV) [2]. For all

Flierl, Markus

135

Nuclear reactor control rod cluster for enthalpy rise compensation  

SciTech Connect (OSTI)

This patent describes a control arrangement for use with a nuclear fuel assembly having guide thimbles to provide enthalpy rise compensation, comprising: (a) a spider assembly; and (b) control rodlets containing neutron absorber material, supported at their upper ends from the spider assembly in a pattern which matches that of the guide thimbles and extending generally parallel to one another downwardly for insertion into the guide thimbles of the fuel assembly; (c) the control rodlets arranged in a cluster having a higher axial neutron absorption capability at an upper portion than at a lower portion; each control rodlet varying in axial neutron absorption capability from every other rodlet.

Freeman, T.R.

1987-07-07T23:59:59.000Z

136

Demand response compensation, net Benefits and cost allocation: comments  

SciTech Connect (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

137

On site relay transient testing for a series compensation upgrade  

SciTech Connect (OSTI)

This paper describes tests on the relays on a long 500kV ac line carried out on site using the RTDS (Real Time Digital Simulator) of the Manitoba HVDC Research Centre. The purpose of the tests was to examine the relay behavior when series compensation is inserted in the line in 1993. New settings for the relays have been found which will give adequate cover for all faults although some faults will be entirely dependent on the communication link for short clearance times.

McLaren, P.G.; Kuffel, R.; Giesbrecht, J.; Keerthipala, W. (Manitoba HVDC Research Centre, Winnipeg, Manitoba (Canada)); Castro, A.; Fedirchuk, D.; Innes, S. (Manitoba Hydro, Winnipeg, Manitoba (Canada)); Mustaphi, K. (Northern States Power, Minneapolis, MN (United States)); Sletten, K. (Minnesota Power, Duluth, MN (United States))

1994-07-01T23:59:59.000Z

138

Microsoft Word - DE-EM0003383 Workers Compensation.docx  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces andMappingENVIRONMENTAL IMPACTApproved:GEORGEI Workers' Compensation Claims5

139

Spitzer Observations of Var Her 04: Possible Detection of Dust Formation in a Super-Outbursting TOAD  

E-Print Network [OSTI]

We present four MIPS (24 \\micron) and two IRAC (3.6, 4.5, 5.8, and 8.0 \\micron) Spitzer observations of the newly discovered Tremendous Outburst Amplitude Dwarf nova (TOAD) Var Her 04 during decline from super-outburst. The four MIPS observations span 271 days and the two IRAC observations span 211 days. Along the line-of-sight to Var Her 04, there is a foreground M-star within 1\\arcsec of the variable; as a result, all of the Spitzer photometry presented in this paper is a blend of the foreground M-star and Var Her 04. We estimate the quiescent level of the TOAD to be $\\Delta V=4-5$ magnitudes below that of the M-star. Based upon the spectral energy distribution and the 2MASS colors, we find the M-star to be an M3.5V dwarf at a distance of 80-130 pc. Based upon its outburst amplitude and quiescent apparent magnitude, we estimate the distance to Var Her 04 to be 200-400 pc, suggesting that the line-of-sight foreground star is physically unrelated to the cataclysmic variable. All of the Spitzer photometry is consistent with the photospheric emission of the line-of-sight M3.5V star, except for one 24 \\micron observation obtained after the variable re-brightened. This 24 \\micron flux density is 75 $\\mu$Jy ($4\\sigma$) above the preceding and following MIPS observations. We tentatively suggest that the mid-infrared brightening of 75 $\\mu$Jy may be associated with a dust formation event in the super-outburst ejecta. Assuming a dust temperature of 100-400 K, we have estimated the amount of dust required. We find $10^{-13}-10^{-11}$ M$_\\odot$ of dust is needed, consistent with amounts of mass ejection in TOADs expected during super-outburst, and possibly making TOADs important contributors to the recycling of the interstellar medium.

David R. Ciardi; Stefanie Wachter; D. W. Hoard; Steve B. Howell; Gerard T. van Belle

2006-08-03T23:59:59.000Z

140

Design and evaluation of a stiffness compensating ankle-foot orthosis:.  

E-Print Network [OSTI]

??This study proposes an ankle-foot orthosis (AFO) based on a novel concept to compensate increased ankle joint stiffness by adding negative stiffness to the joint. (more)

Verbakel, F.

2013-01-01T23:59:59.000Z

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.


141

E-Print Network 3.0 - accidents--worker compensation laws Sample...  

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

> >> 1 LEHIGH UNIVERSITY RESEARCH AND TESTING AGREEMENT Summary: ,000,000 aggregate. Automobile Liability at 1,000,000 each accident. Workers' Compensation at statutory limits......

142

E-Print Network 3.0 - advanced series compensation Sample Search...  

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

TRANSACTIONS ON POWER ELECTRONICS, VOL. 17, NO. 1, JANUARY 2002 A New Hybrid Active Power Filter (APF) Topology Summary: harmonic current compensation. The function of the IGBT...

143

E-Print Network 3.0 - active filter compensator Sample Search...  

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

TRANSACTIONS ON POWER ELECTRONICS, VOL. 17, NO. 1, JANUARY 2002 A New Hybrid Active Power Filter (APF) Topology Summary: topology is capable of compensating for the load...

144

E-Print Network 3.0 - automatic tube compensation Sample Search...  

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

REGIONS Summary: to approximately compensate. The magnetic energy density inside a flux tube depends on its evolu- tion during rise... tube emergence from a deep dynamo layer....

145

E-Print Network 3.0 - accident compensation insurance Sample...  

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

British Columbia Collection: Engineering ; Geosciences 8 PURCHASING DEPARTMENT SUBJECT: CERTIFICATES OF INSURANCE Summary: than 2,000,000; and c) Worker's compensation insurance...

146

E-Print Network 3.0 - adaptive thermal compensation Sample Search...  

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

schemes like the band-gap reference c. Limitation of thermal runaway... . Resistor ballast 2. Mitigation of thermal runaway by temperature matching and compensation....

147

Evaluation of interpolation methods for surface-based motion compensated tomographic reconstruction for cardiac angiographic C-arm data  

SciTech Connect (OSTI)

Purpose: For interventional cardiac procedures, anatomical and functional information about the cardiac chambers is of major interest. With the technology of angiographic C-arm systems it is possible to reconstruct intraprocedural three-dimensional (3D) images from 2D rotational angiographic projection data (C-arm CT). However, 3D reconstruction of a dynamic object is a fundamental problem in C-arm CT reconstruction. The 2D projections are acquired over a scan time of several seconds, thus the projection data show different states of the heart. A standard FDK reconstruction algorithm would use all acquired data for a filtered backprojection and result in a motion-blurred image. In this approach, a motion compensated reconstruction algorithm requiring knowledge of the 3D heart motion is used. The motion is estimated from a previously presented 3D dynamic surface model. This dynamic surface model results in a sparse motion vector field (MVF) defined at control points. In order to perform a motion compensated reconstruction, a dense motion vector field is required. The dense MVF is generated by interpolation of the sparse MVF. Therefore, the influence of different motion interpolation methods on the reconstructed image quality is evaluated. Methods: Four different interpolation methods, thin-plate splines (TPS), Shepard's method, a smoothed weighting function, and a simple averaging, were evaluated. The reconstruction quality was measured on phantom data, a porcine model as well as on in vivo clinical data sets. As a quality index, the 2D overlap of the forward projected motion compensated reconstructed ventricle and the segmented 2D ventricle blood pool was quantitatively measured with the Dice similarity coefficient and the mean deviation between extracted ventricle contours. For the phantom data set, the normalized root mean square error (nRMSE) and the universal quality index (UQI) were also evaluated in 3D image space. Results: The quantitative evaluation of all experiments showed that TPS interpolation provided the best results. The quantitative results in the phantom experiments showed comparable nRMSE of Almost-Equal-To 0.047 {+-} 0.004 for the TPS and Shepard's method. Only slightly inferior results for the smoothed weighting function and the linear approach were achieved. The UQI resulted in a value of Almost-Equal-To 99% for all four interpolation methods. On clinical human data sets, the best results were clearly obtained with the TPS interpolation. The mean contour deviation between the TPS reconstruction and the standard FDK reconstruction improved in the three human cases by 1.52, 1.34, and 1.55 mm. The Dice coefficient showed less sensitivity with respect to variations in the ventricle boundary. Conclusions: In this work, the influence of different motion interpolation methods on left ventricle motion compensated tomographic reconstructions was investigated. The best quantitative reconstruction results of a phantom, a porcine, and human clinical data sets were achieved with the TPS approach. In general, the framework of motion estimation using a surface model and motion interpolation to a dense MVF provides the ability for tomographic reconstruction using a motion compensation technique.

Mueller, Kerstin; Schwemmer, Chris; Hornegger, Joachim [Pattern Recognition Lab, Department of Computer Science, Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universitaet Erlangen-Nuernberg, Erlangen 91058 (Germany); Zheng Yefeng; Wang Yang [Imaging and Computer Vision, Siemens Corporate Research, Princeton, New Jersey 08540 (United States); Lauritsch, Guenter; Rohkohl, Christopher; Maier, Andreas K. [Siemens AG, Healthcare Sector, Forchheim 91301 (Germany); Schultz, Carl [Thoraxcenter, Erasmus MC, Rotterdam 3000 (Netherlands); Fahrig, Rebecca [Department of Radiology, Stanford University, Stanford, California 94305 (United States)

2013-03-15T23:59:59.000Z

148

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

149

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. 5 figs.

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

1987-10-05T23:59:59.000Z

150

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

151

Study of space charge compensation phenomena in charged particle beams  

SciTech Connect (OSTI)

The propagation of a charged particle beam is accompanied by the production of secondary particles created in the interaction of the beam itself with the background gas flowing in the accelerator tube. In the drift region, where the electric field of the electrodes is negligible, secondary particles may accumulate giving a plasma which shields the self-induced potential of the charged beam. This phenomenon, known as space charge compensation is a typical issue in accelerator physics, where it is usually addressed by means of 1D radial transport codes or Monte Carlo codes. The present paper describes some theoretical studies on this phenomenon, presenting a Particle in Cell-Monte Carlo (PIC-MC) Code developed ad hoc where both radial and axial confinements of secondary particles are calculated. The features of the model, offering a new insight on the problem, are described and some results discussed.

Veltri, P.; Serianni, G. [Consorzio RFX, C.so Stati Uniti 4, 35100 Padova (Italy); Cavenago, M. [INFN-LNL, Viale dell'Universita 2, 35020 Legnaro (Italy)

2012-02-15T23:59:59.000Z

152

Compensation of flare-induced CD changes EUVL  

DOE Patents [OSTI]

A method for compensating for flare-induced critical dimensions (CD) changes in photolithography. Changes in the flare level results in undesirable CD changes. The method when used in extreme ultraviolet (EUV) lithography essentially eliminates the unwanted CD changes. The method is based on the recognition that the intrinsic level of flare for an EUV camera (the flare level for an isolated sub-resolution opaque dot in a bright field mask) is essentially constant over the image field. The method involves calculating the flare and its variation over the area of a patterned mask that will be imaged and then using mask biasing to largely eliminate the CD variations that the flare and its variations would otherwise cause. This method would be difficult to apply to optical or DUV lithography since the intrinsic flare for those lithographies is not constant over the image field.

Bjorkholm, John E. (Pleasanton, CA); Stearns, Daniel G. (Los Altos, CA); Gullikson, Eric M. (Oakland, CA); Tichenor, Daniel A. (Castro Valley, CA); Hector, Scott D. (Oakland, CA)

2004-11-09T23:59:59.000Z

153

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. 10 figs.

Meyer, J. W.

1981-05-05T23:59:59.000Z

154

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

155

COMPENSATION OF DETECTOR SOLENOID IN SUPER-B  

SciTech Connect (OSTI)

The SUPER-B detector solenoid has a strong 1.5 T field in the Interaction Region (IR) area, and its tails extend over the range of several meters. The main effect of the solenoid field is coupling of the horizontal and vertical betatron motion which must be corrected in order to preserve the small design beam size at the Interaction Point. The additional effects are orbit and dispersion caused by the angle between the solenoid and beam trajectories. The proposed correction system provides local compensation of the solenoid effects independently for each side of the IR. It includes 'bucking' solenoids to remove the solenoid field tails and a set of skew quadrupoles, dipole correctors and anti-solenoids to cancel linear perturbations to the optics. Details of the correction system are presented.

Nosochkov, Yuri; Bertsche, Kirk; Sullivan, Michael; /SLAC

2011-06-02T23:59:59.000Z

156

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

157

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

158

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. 4 figs.

Allen, G.R.; Moskowitz, P.E.

1990-03-27T23:59:59.000Z

159

ADVANCES IN CHANNEL COMPENSATION FOR SVM SPEAKER RECOGNITION Alex Solomonoff, W. M. Campbell, Ian Boardman  

E-Print Network [OSTI]

ADVANCES IN CHANNEL COMPENSATION FOR SVM SPEAKER RECOGNITION Alex Solomonoff, W. M. Campbell, Ian for speaker recognition using support vector ma- chines (SVMs). We perform channel compensation in SVM on a different channel. Many methods have been proposed to mitigate the problem--new features, transformation

160

Univ. Paderborn R. No 1 In-service PMD monitoring and compensation  

E-Print Network [OSTI]

penalty vs. normalized DGD Electrical PMD compensation Penalty [dB] 0 0.2 0.4 0.6 0.8 1 0 2 4 6 8 10 12 University of Paderborn Electrical Engineering and Information Technology Optical Communication and High references. #12;Univ. Paderborn © R. Noé 2 Overview Introduction Electrical PMD compensation PMD detection 1

Noé, Reinhold

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

GRAVITY ERROR COMPENSATION USING SECOND-ORDER GAUSS-MARKOV PROCESSES  

E-Print Network [OSTI]

AAS 11-502 GRAVITY ERROR COMPENSATION USING SECOND-ORDER GAUSS-MARKOV PROCESSES Jason M. Leonard the use of a second-order Gauss-Markov process to compensate for higher order spherical harmonic gravity an improvement in POD through the use of a second-order Gauss-Markov process (GMP2) for modeling J3 gravity

Born, George

162

Department of Electrical Engineering Fall 2011 Automatic Motion Compensated Radar Target Mounting System  

E-Print Network [OSTI]

Mounting System Overview This project was to design and build a system that compensated for pitch and yaw a motion compensation system that attaches to the trihedral to achieve this. Objectives We designed and built a gimbal system to physically achieve the desired movement and we designed and implemented

Demirel, Melik C.

163

Friction Observer and Compensation for Control of Robots with Joint Torque Measurement  

E-Print Network [OSTI]

Friction Observer and Compensation for Control of Robots with Joint Torque Measurement Luc Le Tien-- In this paper we introduce a friction observer for robots with joint torque sensing (in particular for the DLR. The observer output corresponds to the low-pass filtered friction torque. It is used for friction compensation

De Luca, Alessandro

164

Adaptive Friction Compensation for Servo J. Wang, S. S. Ge, and T. H. Lee  

E-Print Network [OSTI]

Adaptive Friction Compensation for Servo Mechanisms J. Wang, S. S. Ge, and T. H. Lee Department@nus.edu.sg Abstract Friction exists in all machines having relative motion, and plays an important role in many servo, accurate friction modeling and effective compensation techniques have to be investigated. In this chapter

Ge, Shuzhi Sam

165

Reduced Order Model Compensator Control of Species Transport in a CVD Reactor  

E-Print Network [OSTI]

Reduced Order Model Compensator Control of Species Transport in a CVD Reactor G.M. Kepler, H for computation of feedback controls and compensators in a high pressure chemical vapor deposition (HPCVD) reactor, through open­loop optimization [6, 21, 34]. However, because of process variability and the in­ creasing

166

Blind Compensation of Nonlinear Distortions : Application to Source Separation of Post-Nonlinear  

E-Print Network [OSTI]

1 Blind Compensation of Nonlinear Distortions : Application to Source Separation of Post of blind compensation of nonlinear distortions. Our approach relies on the assumption that the input approached is considered in the development of a two-stage method for blind source separation (BSS) in post

Paris-Sud XI, Universit de

167

Compensation du mouvement respiratoire dans les images TEP Respiratory motion correction in PET images  

E-Print Network [OSTI]

Compensation du mouvement respiratoire dans les images TEP Respiratory motion correction in PET itérative. Abstract The quality of the Positron Emission Tomography (PET) is currently limited an integrated system to compensate respiratory motion in PET images. It is based on synchronous acquisition

Paris-Sud XI, Université de

168

Pressure-Compensated Hydrogen Fuel Cell WiSys Prototype Development Fund  

E-Print Network [OSTI]

Pressure-Compensated Hydrogen Fuel Cell WiSys Prototype Development Fund Final Report Principal Description The purpose of this project was to reduce-to-practice the pressure-compensated hydrogen fuel cell was intended to provide a solution for making more reliable and efficient hydrogen fuel cells than the present

Wu, Mingshen

169

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

SciTech Connect (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

170

A Recurrent Neural Multi-Model for Mechanical Systems Dynamics Compensation  

E-Print Network [OSTI]

Mexico D.F., Mexico ** Institute of Information Technologies, 1113 Sofia Abstract: The paper proposed nonlinear mechanical plants with backlash. The parameters and states of the local recurrent neural network of the plant model. For example, N a r e n d r a and P a r t h a s a r a t h y [5], applied FFNN for system

Borissova, Daniela

171

Price Discovery in Dynamic Power Markets with Low-Voltage Distribution-Network Participants  

E-Print Network [OSTI]

-distribution network locational marginal prices; power flow; reactive power compensation; voltage control; distributed application to Electric Power [2, 3] dynamic Locational-Marginal-Price (LMP) based Wholesale Power Markets to clear markets and discover dynamic Locational Marginal Prices (LMPs) that promoted more efficient

Caramanis, Michael

172

Smoothing of respiratory motion traces for motion-compensated radiotherapy  

SciTech Connect (OSTI)

Purpose: The CyberKnife system has been used successfully for several years to radiosurgically treat tumors without the need for stereotactic fixation or sedation of the patient. It has been shown that tumor motion in the lung, liver, and pancreas can be tracked with acceptable accuracy and repeatability. However, highly precise targeting for tumors in the lower abdomen, especially for tumors which exhibit strong motion, remains problematic. Reasons for this are manifold, like the slow tracking system operating at 26.5 Hz, and using the signal from the tracking camera ''as is''. Since the motion recorded with the camera is used to compensate for system latency by prediction and the predicted signal is subsequently used to infer the tumor position from a correlation model based on x-ray imaging of gold fiducials around the tumor, camera noise directly influences the targeting accuracy. The goal of this work is to establish the suitability of a new smoothing method for respiratory motion traces used in motion-compensated radiotherapy. The authors endeavor to show that better prediction--With a lower rms error of the predicted signal--and/or smoother prediction is possible using this method. Methods: The authors evaluated six commercially available tracking systems (NDI Aurora, PolarisClassic, Polaris Vicra, MicronTracker2 H40, FP5000, and accuTrack compact). The authors first tracked markers both stationary and while in motion to establish the systems' noise characteristics. Then the authors applied a smoothing method based on the a trous wavelet decomposition to reduce the devices' noise level. Additionally, the smoothed signal of the moving target and a motion trace from actual human respiratory motion were subjected to prediction using the MULIN and the nLMS{sub 2} algorithms. Results: The authors established that the noise distribution for a static target is Gaussian and that when the probe is moved such as to mimic human respiration, it remains Gaussian with the exception of the FP5000 and the Aurora systems. The authors also showed that the proposed smoothing method can indeed be used to filter noise. The signal's jitter dropped by as much as 95% depending on the tracking system employed. Subsequently, the 3D prediction error (rms) for a prediction horizon of 150 ms on a synthetic signal dropped by up to 37% when using a normalized LMS prediction algorithm (nLMS{sub 2}) and hardly changed when using a MULIN algorithm. When smoothing a real signal obtained in our laboratory, the improvement of prediction was similar: Up to 30% for both the nLMS{sub 2} and the best MULIN algorithm. The authors also found a noticeable increase in smoothness of the predicted signal, the relative jitter dropped by up to 95% on the real signal, and on the simulated signal. Conclusions: In conclusion, the authors can say that preprocessing of marker data is very useful in motion-compensated radiotherapy since the quality of prediction increases. This will result in better performance of the correlation model. As a side effect, since the prediction of a preprocessed signal is also less noisy, the authors expect less robot vibration resulting in better targeting accuracy and less strain on the robot gears.

Ernst, Floris; Schlaefer, Alexander; Schweikard, Achim [Institute for Robotics and Cognitive Systems, University of Luebeck, Ratzeburger Allee 160, Luebeck SH 23538 (Germany)

2010-01-15T23:59:59.000Z

173

Development and Implementation of a Compensation Technique for Luminescent Sensors  

E-Print Network [OSTI]

(DRLD) approach utilizes a dynamic windowing algorithm to select the optimal window width for calculation of lifetimes using an integrative approach. This method was demonstrated with an oxygen-sensitive luminophore and shown to accurately determine...

Collier, Bradley

2013-09-19T23:59:59.000Z

174

Nuclear Instruments and Methods in Physics Research A 554 (2005) 340346 A compensated fission detector based on photovoltaic cells  

E-Print Network [OSTI]

detector based on photovoltaic cells M. Petita , T. Ethvignota , T. Graniera,?, R.C. Haightb , J.M. O fission fragment detector based on compensated photovoltaic cells has been developed. The compensated. Keywords: Fission; Fission detection; Compensated detector; Lead slowing-down spectrometer; Photovoltaic

Danon, Yaron

175

The role of space charge compensation for ion beam extraction and ion beam transport (invited)  

SciTech Connect (OSTI)

Depending on the specific type of ion source, the ion beam is extracted either from an electrode surface or from a plasma. There is always an interface between the (almost) space charge compensated ion source plasma, and the extraction region in which the full space charge is influencing the ion beam itself. After extraction, the ion beam is to be transported towards an accelerating structure in most cases. For lower intensities, this transport can be done without space charge compensation. However, if space charge is not negligible, the positive charge of the ion beam will attract electrons, which will compensate the space charge, at least partially. The final degree of Space Charge Compensation (SCC) will depend on different properties, like the ratio of generation rate of secondary particles and their loss rate, or the fact whether the ion beam is pulsed or continuous. In sections of the beam line, where the ion beam is drifting, a pure electrostatic plasma will develop, whereas in magnetic elements, these space charge compensating electrons become magnetized. The transport section will provide a series of different plasma conditions with different properties. Different measurement tools to investigate the degree of space charge compensation will be described, as well as computational methods for the simulation of ion beams with partial space charge compensation.

Spdtke, Peter, E-mail: p.spaedtke@gsi.de [GSI Helmholtzzentrum fr Schwerionenforschung GmbH (Germany)] [GSI Helmholtzzentrum fr Schwerionenforschung GmbH (Germany)

2014-02-15T23:59:59.000Z

176

Development of a straightness measurement and compensation system with multiple right-angle reflectors and a lead zirconate titanate-based compensation stage  

SciTech Connect (OSTI)

This paper presents a real-time straightness measurement and compensation system with an optical straightness measurement system and a single-axis flexure-hinge type lead zirconate titanate (PZT)-based compensation stage. The optical straightness measurement system consists of a He-Ne laser, a quadrant photodiode detector, and five right-angle reflectors. Multiple laser beam reflections between the right-angle reflectors increase the sensitivity of the straightness measurement by a factor of 6. The right-angle reflectors can be moved by the flexure-hinge type PZT-based compensation stage that is actuated by a PZT actuator to ensure that the laser beam is always projected onto the center of the quadrant detector. These two systems are integrated and fixed on a scanning stage. The resolution of the straightness measurement system is 0.1 {mu}m. Using the real-time straightness compensation system, the straightness error of the scanning stage is fed back to the control system. The compensated straightness error of the scanning stage system was reduced from 6.5 {mu}m to less than 1 {mu}m.

Liu, Chien-Hung; Chen, Jui-Hung [Institute of Electro-Optical and Materials Science, National Formosa University, Huwei, Yunlin 632, Taiwan (China); Teng, Yun-Feng [Department of Mechanical Engineering, National Chung-Cheng University, Chiayi 621, Taiwan (China)

2009-11-15T23:59:59.000Z

177

Compensated individually addressable array technology for human breast imaging  

DOE Patents [OSTI]

A method of forming broad bandwidth acoustic or microwave beams which encompass array design, array excitation, source signal preprocessing, and received signal postprocessing. This technique uses several different methods to achieve improvement over conventional array systems. These methods are: 1) individually addressable array elements; 2) digital-to-analog converters for the source signals; 3) inverse filtering from source precompensation; and 4) spectral extrapolation to expand the bandwidth of the received signals. The components of the system will be used as follows: 1) The individually addressable array allows scanning around and over an object, such as a human breast, without any moving parts. The elements of the array are broad bandwidth elements and efficient radiators, as well as detectors. 2) Digital-to-analog converters as the source signal generators allow virtually any radiated field to be created in the half-space in front of the array. 3) Preprocessing allows for corrections in the system, most notably in the response of the individual elements and in the ability to increase contrast and resolution of signal propagating through the medium under investigation. 4) Postprocessing allows the received broad bandwidth signals to be expanded in a process similar to analytic continuation. Used together, the system allows for compensation to create beams of any desired shape, control the wave fields generated to correct for medium differences, and improve contract and resolution in and through the medium.

Lewis, D. Kent (San Francisco, CA)

2003-01-01T23:59:59.000Z

178

Revisiting plasma hysteresis with an electronically compensated Langmuir probe  

SciTech Connect (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

179

BORON-OXYGEN DEFECTS IN COMPENSATED P-TYPE CZOCHRALSKI SILICON D. Macdonald1  

E-Print Network [OSTI]

BORON-OXYGEN DEFECTS IN COMPENSATED P-TYPE CZOCHRALSKI SILICON D. Macdonald1 , A. Liu1 , F Energy, PO Box 1, NL-1755 ZG Petten, The Netherlands. email: daniel.macdonald@anu.edu.au ABSTRACT

180

Highly Parallel Magnetic Resonance Imaging with a Fourth Gradient Channel for Compensation of RF Phase Patterns  

E-Print Network [OSTI]

A fourth gradient channel was implemented to provide slice dependent RF coil phase compensation for arrays in dual-sided or "sandwich" configurations. The use of highly parallel arrays for single echo acquisition magnetic resonance imaging allows...

Bosshard, John 1983-

2012-08-20T23:59:59.000Z

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.


181

Slip-Compensated Path Following for Planetary Exploration Daniel M. Helmick, Stergios I. Roumeliotis  

E-Print Network [OSTI]

estimator, and a slip-compensated path following algorithm. Figure 2 provides a high-level functional block kinematics, described in Section 3, uses position sensor inputs from the joints and wheels of the rocker

Waliser, Duane E.

182

Impact of dopant compensation on the electrical properties of silicon for solar cell applications  

E-Print Network [OSTI]

of ECN for kindly supplying some of the compensated wafers. Thank you to Dr. Ron Sinton and James Swirhun of Sinton Instruments, for helpful discussions regarding lifetime measurements. I would like to express my

183

Executive Compensation and Business Policy Choices at U.S. Commercial Banks  

E-Print Network [OSTI]

This study examines whether and how the terms of CEO compensation contracts at large commercial banks between 1994 and 2006 influenced, or were influenced by, the risky business policy decisions made by these firms. We ...

DeYoung, Robert; Peng, Emma Y.; Yan, Meng

2010-01-01T23:59:59.000Z

184

Apparatus and method for compensating for clock drift in downhole drilling components  

DOE Patents [OSTI]

A precise downhole clock that compensates for drift includes a prescaler configured to receive electrical pulses from an oscillator. The prescaler is configured to output a series of clock pulses. The prescaler outputs each clock pulse after counting a preloaded number of electrical pulses from the oscillator. The prescaler is operably connected to a compensator module for adjusting the number loaded into the prescaler. By adjusting the number that is loaded into the prescaler, the timing may be advanced or retarded to more accurately synchronize the clock pulses with a reference time source. The compensator module is controlled by a counter-based trigger module configured to trigger the compensator module to load a value into the prescaler. Finally, a time-base logic module is configured to calculate the drift of the downhole clock by comparing the time of the downhole clock with a reference time source.

Hall, David R. (Provo, UT); Pixton, David S. (Lehi, UT); Johnson, Monte L. (Orem, UT); Bartholomew, David B. (Springville, UT); Hall, Jr., H. Tracy (Provo, UT)

2007-08-07T23:59:59.000Z

185

IEEE Transactions on Automation Science and Engineering Compensation of Scanner Creep and Hysteresis  

E-Print Network [OSTI]

IEEE Transactions on Automation Science and Engineering Compensation of Scanner Creep uncertainties associated with creep and hysteresis, and supports automated, computer-controlled manipulation) and by automation, which bypasses the time- consuming

Southern California, University of

186

Generation kinetics of boron-oxygen complexes in p-type compensated c-Si  

SciTech Connect (OSTI)

Kinetics characteristics of boron-oxygen complexes responsible for light-induced degradation in p-type compensated c-Si have been investigated. The generation of B-O complexes is well fitted by a fast-forming process and a slow-forming one. Activation energies of complexes generation during the fast-forming process are determined to be 0.29 and 0.24?eV in compensated and non-compensated c-Si, respectively, and those during the slow-forming process are the same, about 0.44?eV. Moreover, it is found that the pre-exponential factors of complexes generation in compensated c-Si is proportional to the square of the net doping concentration, which suggests that the latent centers should exist.

Wu, Yichao; Yu, Xuegong, E-mail: yuxuegong@zju.edu.cn; Chen, Peng; Chen, Xianzi; Yang, Deren [State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 (China)] [State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 (China)

2014-03-10T23:59:59.000Z

187

Compensation for L212GLU in bacterial reaction centers  

SciTech Connect (OSTI)

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

188

Impact of insects and physical stress on cotton fruit abscission, retention, compensation and economic value  

E-Print Network [OSTI]

IMPACT OF INSECIS AND PHYSICAL STRESS ON COITON FRUIT ABSCISSION, ~ION, COMPENSATION AND ECONCKIC VAIIJE A Thesis by SCOIT DAVID S~ Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE Decmnber 1987 Najor Subject Entomology IMPACT OF INSECIS AND IKYSICAL STRESS ON COTION FRUIT ABSCISSION, ~ON, COMPENSATION AND ECONOMIC VAII3E A Thesis SCOIT DAVID S~ Approved as to style and content by: Winfield L...

Stewart, Scott David

1987-01-01T23:59:59.000Z

189

Crosstalk Compensation for a Rapid, Higher Resolution Impedance Spectrum Measurement  

SciTech Connect (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

190

Space Charge Compensation in the Linac4 Low Energy Beam Transport Line with Negative Hydrogen Ions  

E-Print Network [OSTI]

The space charge effect of low energy, unbunched ion beams can be compensated by the trapping of ions or electrons into the beam potential. This has been studied for the 45 keV negative hydrogen ion beam in the CERN Linac4 Low Energy Beam Tranport (LEBT) using the package IBSimu1, which allows the space charge calculation of the particle trajectories. The results of the beam simulations will be compared to emittance measurements of an H- beam at the CERN Linac4 3 MeV test stand, where the injection of hydrogen gas directly into the beam transport region has been used to modify the space charge compensation degree.

Valerio-Lizarraga, C; Leon-Monzon, I; Lettry, J; Midttun, O; Scrivens, R

2013-01-01T23:59:59.000Z

191

Fern (Notholaena sinuata, var. Crenata) Poisoning in Sheep, Goats and Cattle : The So-Called "Jimmies" of the Trans-Pecos.  

E-Print Network [OSTI]

corresponding number of sheep but the loss is never severe. The goat appears to be more conscious of approaching danger and when the symptoms appear can not be forced to continue ~valking. It is probably this ability of the goat to take care of itself rather...TEXAS AGRICULTURAL EXPERIMENT STATION A. B. CONNER, DIRECTOR College Station, Texas BULLETIN NO. 611 APRIL 1942 FERN (NOTHOLAENA SINUATA, var. Crenata) POISONING IN SHEEP, GOATS, AND CATTLE-THE SO-CALLED "JIMMIES" OF THE TRANS-PECOS FRANK P...

Mathews, Frank P. (Frank Patrick)

1942-01-01T23:59:59.000Z

192

718 IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 9, NO. 5, SEPTEMBER 2001 Reactive Power and Unbalance Compensation Using  

E-Print Network [OSTI]

718 IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 9, NO. 5, SEPTEMBER 2001 Reactive Power as reactive power and unbalance compensators, e.g., Static synchronous compensator (STATCOM). The approach practice. Index Terms--Active filters, adaptive control, dissipative sys- tems, nonlinear systems, reactive

Stankoviæ, Aleksandar

193

Temporal integration of focus position signal during compensation for pursuit in optic flow  

E-Print Network [OSTI]

Temporal integration of focus position signal during compensation for pursuit in optic flow Center in optic flow that specifies heading. Concurrent smooth pursuit causes distortion of the retinal flow on optic flow perception has received little attention. Here we separated the effects of velocity and gaze

Krekelberg, Bart

194

Reliability of IGBT in a STATCOM for Harmonic Compensation and Power Factor Correction  

E-Print Network [OSTI]

Reliability of IGBT in a STATCOM for Harmonic Compensation and Power Factor Correction Lakshmi Gopi Oak Ridge, USA. Abstract--With smart grid integration, there is a need to characterize reliability of a power system by including reliability of power semiconductors in grid related applications

Tolbert, Leon M.

195

On compensating tune spread induced by space charge in bunched beams  

SciTech Connect (OSTI)

Space charge effects play significant role in modern-day accelerators. These effects frequently constrain attainable beam parameters in an accelerator, or, in an accelerator chain. They also could limit the luminosity of hadron colliders operating either at low energies or with a sub-TeV high brightness hadron beams. The latter is applied for strongly cooled proton and ion beams in eRHIC the proposed future electron-ion collider at Brookhaven National Laboratory. A number of schemes for compensating space charge effects in a coasting (e.g. continuous) hadron beam were proposed and some of them had been tested. Using a proper transverse profile of the electron beam (or plasma column) for a coasting beam would compensate both the tune shift and the tune spread in the hadron beam. But all of these methods do not address the issue of tune spread compensation of a bunched hadron beam, e.g. the tune shift dependence on the longitudinal position inside the bunch. In this paper we propose and evaluate a novel idea of using a co-propagating electron bunch with miss-matched longitudinal velocity to compensate the space charge induced tune-shift and tune spread. We present a number of practical examples of such system.

Litvinenko, V. N.; Wang, G.

2014-05-09T23:59:59.000Z

196

Fuel Puddle Model and AFR Compensator for Gasoline-Ethanol Blends in Flex-Fuel Engines*  

E-Print Network [OSTI]

Fuel Puddle Model and AFR Compensator for Gasoline-Ethanol Blends in Flex-Fuel Engines* Kyung vehicles (FFVs) can operate on a blend of gasoline and ethanol in any concentration of up to 85% ethanol for gasoline-ethanol blends is, thus, necessary for the purpose of air-to-fuel ratio control. In this paper, we

Stefanopoulou, Anna

197

Enclosure 3 INSTRUCTIONS TO CONTRACTING OFFICERS: The special contract requirement "Workers Compensation  

E-Print Network [OSTI]

10 Enclosure 3 INSTRUCTIONS TO CONTRACTING OFFICERS: The special contract requirement "Workers Compensation Insurance (Defense Base Act) (April 2011)" shall be included in the contract as applicable. Whenever Defense Base Act (DBA) insurance is required under the contract, the following special contract

US Army Corps of Engineers

198

Compensation for Coarticulation: Disentangling Auditory and Gestural Theories of Perception of Coarticulatory Effects in Speech  

E-Print Network [OSTI]

The general ecological view of perception (e.g., Gibson, 1979), from which the direct realist theory of speechCompensation for Coarticulation: Disentangling Auditory and Gestural Theories of Perception of Connecticut and Haskins Laboratories, New Haven, Connecticut According to one approach to speech perception

199

PEV-based Reactive Power Compensation for Wind DG Units: A Stackelberg Game Approach  

E-Print Network [OSTI]

. Keywords--Distributed generation, wind power integration, plug-in electric vehicles, reactive power]. In [6], Li et al. used stochastic programming to obtain the optimal plug-in electric vehicle (PEV) power be compensated locally, we consider a scenario where a wind DG unit is co-located with a plug-in electric vehicle

Huang, Jianwei

200

Noise Driven Short-Time Phase Spectrum Compensation Procedure for Speech Enhancement  

E-Print Network [OSTI]

Noise Driven Short-Time Phase Spectrum Compensation Procedure for Speech Enhancement Anthony P.lyons, k.paliwal}@griffith.edu.au Abstract Typical speech enhancement algorithms operate on the short- time approach to speech enhancement has been proposed where the noisy mag- nitude spectrum is recombined

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

Verification of Computer Display Pre-compensation for Visual Aberrations in an Artificial Eye  

E-Print Network [OSTI]

Verification of Computer Display Pre-compensation for Visual Aberrations in an Artificial Eye user's eye) has been confirmed for a simple "artificial eye". This device has been constructed from (CCD) array that mimics the retina of a real eye. While the CCD array allows for the inspection

Barreto, Armando

202

A proposal to improve ecological compensation practice in road and railway projects in Spain  

SciTech Connect (OSTI)

To reduce ecological impacts caused by development projects, avoidance, minimization and compensation techniques have to be taken together into consideration along Environmental Impact Assessment (EIA) procedures. This paper explores the particular role that ecological compensation has had in recent road and railway EIA procedures in Spain, as seen through the review of a set of recent EIA Records of Decision (RODs) that confirms precedent findings. Noticing that residual impacts are not paid much attention, and that there is no evidence of a solid public participation in ecological impact evaluation, it proposes to increase the awareness on residual impacts, as a way to make easier public access to the allegedly most sensitive moment of EIA implementation: (residual) impact evaluation. -- Highlights: ? Ecological compensation practice in Spain is much lower than avoidance or mitigation. ? Residual impacts are overlooked in EIA processes and public participation is low. ? An increased awareness of residual impacts may also promote public participation. ? Current context needs these small steps to move towards better compensation practice.

Villarroya, Ana, E-mail: avillarroya@alumni.unav.es; Puig, Jordi, E-mail: jpbaguer@unav.es

2013-09-15T23:59:59.000Z

203

Hemorheological alterations, decreased cerebral microvascular oxygenation and cerebral vasomotion compensation in sickle cell patients  

E-Print Network [OSTI]

compensation in sickle cell patients Xavier Waltza,b , Aurélien Pichonc , PhD, Danièle Mougeneld , MD, Nathalie et Universitaire de Pointe-à-Pitre, Pointe-à-Pitre, France Running title: Sickle cell disease count: 2736; Figure/table count: 2 figures (+ 2 online supplement) and 2 tables Abstract Sickle cell

Paris-Sud XI, Université de

204

Strain compensation in boron-indium coimplanted laser thermal processed silicon  

E-Print Network [OSTI]

Strain compensation in boron-indium coimplanted laser thermal processed silicon Mark H. Clarka Strain in B-implanted laser thermal processed LTP silicon is reduced by coimplantation of In. Strain in the codoped layer is calculated using lattice constants measured by high-resolution x-ray diffraction

Florida, University of

205

Improving the Accuracy of Industrial Robots by offline Compensation of Joints Errors  

E-Print Network [OSTI]

level pose accuracy and to achieve a good path tracking. Unfortunately industrial robots are designed are concidered [4]. In [5], authors have worked on modeling the Cartesian compliance of an industrial robotImproving the Accuracy of Industrial Robots by offline Compensation of Joints Errors Adel Olabi

Paris-Sud XI, Université de

206

Reduced Order Based Compensator Control of Thin Film Growth in a CVD Reactor  

E-Print Network [OSTI]

of the reactor so that control and sensing are a basic component of the optimal design e#orts for the reactor. WeReduced Order Based Compensator Control of Thin Film Growth in a CVD Reactor H.T. Banks and H processing approaches with ad­ vanced mathematical modeling, optimization, and control theory to guide

207

Reduced Order Based Compensator Control of Thin Film Growth in a CVD Reactor  

E-Print Network [OSTI]

of the reactor so that control and sensing are a basic component of the optimal design efforts for the reactorReduced Order Based Compensator Control of Thin Film Growth in a CVD Reactor H.T. Banks and H processing approaches with ad- vanced mathematical modeling, optimization, and control theory to guide

208

Fast Image Drift Compensation in Scanning Electron Microscope Using Image Registration  

E-Print Network [OSTI]

Fast Image Drift Compensation in Scanning Electron Microscope Using Image Registration Naresh Marturi, Sounkalo Demb´el´e and Nadine Piat Abstract-- Scanning Electron Microscope (SEM) image ac analysis and characterization of materials to recover their structural, mechanical, electrical and optical

Boyer, Edmond

209

Office of Human Resources -Employment & Compensation 1 MANAGEMENT NON-MANAGEMENT  

E-Print Network [OSTI]

the work of two (2) or more employees · Majority of time is spent directly managing people (i.e. over 50Office of Human Resources - Employment & Compensation 1 MANAGEMENT NON-MANAGEMENT Typically includes, but is not limited to activities such as: Manages direct reports where primary duty

Yener, Aylin

210

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

211

High speed cutting with industrial robots: Towards model based compensation of deviations  

E-Print Network [OSTI]

, [abele|bauer|weigold]@ptw.tu-darmstadt.de Abstract Application of industrial robots for high speedHigh speed cutting with industrial robots: Towards model based compensation of deviations Modeling and numerical simulation of the industrial robot with elastic joints Dr.-Ing. M. Stelzer and Prof. Dr. rer. nat

Stryk, Oskar von

212

Secondary Voltage Unbalance Compensation for Three-Phase Four-Wire Islanded Microgrids  

E-Print Network [OSTI]

as a cluster of distributed resources (DRs), i.e. distributed generation (DG), distributed storage (DSSecondary Voltage Unbalance Compensation for Three-Phase Four-Wire Islanded Microgrids Fen Tang four-wire islanded microgrid systems. It is implemented in the secondary control level of the microgrid

Vasquez, Juan Carlos

213

Extra-Contractual Compensation (ECC) / Summer Salary / Summer ECC Process Academic Resources  

E-Print Network [OSTI]

Extra-Contractual Compensation (ECC) / Summer Salary / Summer ECC Process Academic Resources-up documentation requested from Human Resources or college Forms returned to dean's office for correction/approval and then returned to Acad. Resources when signed Meets cursory review by Academic Resources? Does requested

Hemmers, Oliver

214

An Active Motion Compensation Instrument for Beating Heart Mitral Valve Surgery  

E-Print Network [OSTI]

An Active Motion Compensation Instrument for Beating Heart Mitral Valve Surgery Daniel T. Kettler) is described. The resulting instrument was tested in user trials under a series of positional error bandwidth, creating a wrist that can operate in the restricted workspace within the heart, and ensuring

215

Error Compensation of Single-Qubit Gates in a Surface Electrode Ion Trap Using Composite Pulses  

E-Print Network [OSTI]

The trapped atomic ion qubits feature desirable properties for use in a quantum computer such as long coherence times (Langer et al., 2005), high qubit measurement fidelity (Noek et al., 2013), and universal logic gates (Home et al., 2009). The quality of quantum logic gate operations on trapped ion qubits has been limited by the stability of the control fields at the ion location used to implement the gate operations. For this reason, the logic gates utilizing microwave fields (Brown et al., 2011; Shappert et al., 2013; Harty et al., 2014) have shown gate fidelities several orders of magnitude better than those using laser fields (Knill et al., 2008; Benhelm et al., 2008; Ballance et al., 2014). Here, we demonstrate low-error single-qubit gates performed using stimulated Raman transitions on an ion qubit trapped in a microfabricated chip trap. Gate errors are measured using a randomized benchmarking protocol (Knill et al., 2008; Wallman et al., 2014; Magesan et al., 2012), where amplitude error in the control beam is compensated using various pulse sequence techniques (Wimperis, 1994; Low et al., 2014). Using B2 compensation (Wimperis, 1994), we demonstrate single qubit gates with an average error per randomized Clifford group gate of $3.6(3)\\times10^{-4}$. We also show that compact palindromic pulse compensation sequences (PD$n$) (Low et al., 2014) compensate for amplitude errors as designed.

Emily Mount; Chingiz Kabytayev; Stephen Crain; Robin Harper; So-Young Baek; Geert Vrijsen; Steven Flammia; Kenneth R. Brown; Peter Maunz; Jungsang Kim

2015-04-06T23:59:59.000Z

216

Sensor-less Vibration Suppression and Scan Compensation for Piezoelectric Tube Nanopositioners  

E-Print Network [OSTI]

) (b) Fig. 2. (a) Charge driven tube scanner. (b) Voltage equivalent circuit. introduces two simple nonSensor-less Vibration Suppression and Scan Compensation for Piezoelectric Tube Nanopositioners-fabrication. Much research has proceeded with the aim of reducing hysteresis and vibration, the foremost problems

Fleming, Andrew J.

217

Partial and Full Inverse Compensation for Hysteresis in Smart Material Systems  

E-Print Network [OSTI]

Partial and Full Inverse Compensation for Hysteresis in Smart Material Systems Ralph C. Smith Chad Smart material transducers employing piezoceramic or magnetostrictive drive components typically exhibit and hysteresis in­ herent to the smart material components. The second technique employs a partial inverse

218

Specific features of self-compensation in Er{sub x}Sn{sub 1-x}Se solid solutions  

SciTech Connect (OSTI)

The effect of doping and degree of compensation on the conductivity activation energy {Delta}E{sub i} in Er{sub x}Sn{sub 1-x}Se has been investigated. The carrier concentration decreases at a low doping level in the case of low and moderate compensations. It is found that, beginning with x {>=} 0.005 at % Er, carriers in the solid solutions under study change sign, depending on the amount of substituted erbium in the SnSe samples that is in equilibrium with the selenium phase. This phenomenon can be explained in terms of the concepts of the self-compensation of donors in the Sn sublattice.

Huseynov, J. I., E-mail: cih_58@mail.ru; Murguzov, M. I.; Ismayilov, Sh. S. [Azerbaijan State Pedagogical University (Azerbaijan)

2013-03-15T23:59:59.000Z

219

Space charge compensation in the Linac4 low energy beam transport line with negative hydrogen ions  

SciTech Connect (OSTI)

The space charge effect of low energy, unbunched ion beams can be compensated by the trapping of ions or electrons into the beam potential. This has been studied for the 45 keV negative hydrogen ion beam in the CERN Linac4 Low Energy Beam Transport using the package IBSimu [T. Kalvas et al., Rev. Sci. Instrum. 81, 02B703 (2010)], which allows the space charge calculation of the particle trajectories. The results of the beam simulations will be compared to emittance measurements of an H{sup ?} beam at the CERN Linac4 3 MeV test stand, where the injection of hydrogen gas directly into the beam transport region has been used to modify the space charge compensation degree.

Valerio-Lizarraga, Cristhian A., E-mail: cristhian.alfonso.valerio.lizarraga@cern.ch [CERN, Geneva (Switzerland); Departamento de Investigacin en Fsica, Universidad de Sonora, Hermosillo (Mexico); Lallement, Jean-Baptiste; Lettry, Jacques; Scrivens, Richard [CERN, Geneva (Switzerland)] [CERN, Geneva (Switzerland); Leon-Monzon, Ildefonso [Facultad de Ciencias Fisico-Matematicas, Universidad Autnoma de Sinaloa, Culiacan (Mexico)] [Facultad de Ciencias Fisico-Matematicas, Universidad Autnoma de Sinaloa, Culiacan (Mexico); Midttun, ystein [CERN, Geneva (Switzerland) [CERN, Geneva (Switzerland); University of Oslo, Oslo (Norway)

2014-02-15T23:59:59.000Z

220

Total compensation of line-side switching harmonics in converter-fed ac locomotives  

SciTech Connect (OSTI)

PWM controlled line-side converters of modern ac traction locomotives inject harmonic currents into the feeding overhead line. This causes problems of electromagnetic interference. Passive or active filters are usually provided for a partial reduction of the line harmonics. A novel and superior approach employs a switched electronic compensator. It generates an exact replica of the harmonic current, feeding it to the high-voltage transformer to produce a harmonic counter MMF. The transformer main flux is then forced to be sinusoidal, and so is the induced voltage in the primary. The line current, being low-pass filtered by the transformer leakage inductance, assumes a pure sinusoidal waveform. The compensator operates in the low switching frequency range of the main power converters. Its installed power is only 1% of the traction power. Operation, control, and design considerations are described. Results from laboratory tests at full power level are presented.

Krah, J.O.; Holtz, J. [Univ. of Wuppertal (Germany)] [Univ. of Wuppertal (Germany)

1995-11-01T23:59:59.000Z

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.


221

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

SciTech Connect (OSTI)

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

222

Hadronic energy resolution of a highly granular scintillator-steel hadron calorimeter using software compensation techniques  

E-Print Network [OSTI]

The energy resolution of a highly granular 1 m3 analogue scintillator-steel hadronic calorimeter is studied using charged pions with energies from 10 GeV to 80 GeV at the CERN SPS. The energy resolution for single hadrons is determined to be approximately 58%/sqrt(E/GeV}. This resolution is improved to approximately 45%/sqrt(E/GeV) with software compensation techniques. These techniques take advantage of the event-by-event information about the substructure of hadronic showers which is provided by the imaging capabilities of the calorimeter. The energy reconstruction is improved either with corrections based on the local energy density or by applying a single correction factor to the event energy sum derived from a global measure of the shower energy density. The application of the compensation algorithms to Geant4 simulations yield resolution improvements comparable to those observed for real data.

CALICE Collaboration; C. Adloff; J. Blaha; J. -J. Blaising; C. Drancourt; A. Espargilire; R. Gaglione; N. Geffroy; Y. Karyotakis; J. Prast; G. Vouters; K. Francis; J. Repond; J. Smith; L. Xia; E. Baldolemar; J. Li; S. T. Park; M. Sosebee; A. P. White; J. Yu; T. Buanes; G. Eigen; Y. Mikami; N. K. Watson; T. Goto; G. Mavromanolakis; M. A. Thomson; D. R. Ward; W. Yan; D. Benchekroun; A. Hoummada; Y. Khoulaki; M. Benyamna; C. Crloganu; F. Fehr; P. Gay; S. Manen; L. Royer; G. C. Blazey; A. Dyshkant; J. G. R. Lima; V. Zutshi; J. -Y. Hostachy; L. Morin; U. Cornett; D. David; G. Falley; K. Gadow; P. Gttlicher; C. Gnter; B. Hermberg; S. Karstensen; F. Krivan; A. -I. Lucaci-Timoce; S. Lu; B. Lutz; S. Morozov; V. Morgunov; M. Reinecke; F. Sefkow; P. Smirnov; M. Terwort; A. Vargas-Trevino; N. Feege; E. Garutti; I. Marchesini; M. Ramilli; P. Eckert; T. Harion; A. Kaplan; H. -Ch. Schultz-Coulon; W. Shen; R. Stamen; A. Tadday; B. Bilki; E. Norbeck; Y. Onel; G. W. Wilson; K. Kawagoe; P. D. Dauncey; A. -M. Magnan; M. Wing; F. Salvatore; E. Calvo Alamillo; M. -C. Fouz; J. Puerta-Pelayo; V. Balagura; B. Bobchenko; M. Chadeeva; M. Danilov; A. Epifantsev; O. Markin; R. Mizuk; E. Novikov; V. Rusinov; E. Tarkovsky; N. Kirikova; V. Kozlov; P. Smirnov; Y. Soloviev; P. Buzhan; B. Dolgoshein; A. Ilyin; V. Kantserov; V. Kaplin; A. Karakash; E. Popova; S. Smirnov; C. Kiesling; S. Pfau; K. Seidel; F. Simon; C. Soldner; M. Szalay; M. Tesar; L. Weuste; J. Bonis; B. Bouquet; S. Callier; P. Cornebise; Ph. Doublet; F. Dulucq; M. Faucci Giannelli; J. Fleury; H. Li; G. Martin-Chassard; F. Richard; Ch. de la Taille; R. Pschl; L. Raux; N. Seguin-Moreau; F. Wicek; M. Anduze; V. Boudry; J-C. Brient; D. Jeans; P. Mora de Freitas; G. Musat; M. Reinhard; M. Ruan; H. Videau; B. Bulanek; J. Zacek; J. Cvach; P. Gallus; M. Havranek; M. Janata; J. Kvasnicka; D. Lednicky; M. Marcisovsky; I. Polak; J. Popule; L. Tomasek; M. Tomasek; P. Ruzicka; P. Sicho; J. Smolik; V. Vrba; J. Zalesak; B. Belhorma; H. Ghazlane; T. Takeshita; S. Uozumi; J. Sauer; S. Weber; C. Zeitnitz

2012-09-27T23:59:59.000Z

223

p-Doping limit and donor compensation in CdTe polycrystalline thin film solar cells  

E-Print Network [OSTI]

p-Doping limit and donor compensation in CdTe polycrystalline thin film solar cells Ken K. Chin n Department of Physics and Apollo CdTe Solar Energy Research Center, NJIT, Newark, NJ 07058, USA a r t i c l e May 2010 Keywords: CdTe p-Doping Hole density Non-shallow Acceptor Activation energy a b s t r a c

224

Automatic compensation of antenna beam roll-off in SAR images.  

SciTech Connect (OSTI)

The effects of a non-uniform antenna beam are sometimes visible in Synthetic Aperture Radar (SAR) images. This might be due to near-range operation, wide scenes, or inadequate antenna pointing accuracy. The effects can be mitigated in the SAR image by fitting very a simple model to the illumination profile and compensating the pixel brightness accordingly, in an automated fashion. This is accomplished without a detailed antenna pattern calibration, and allows for drift in the antenna beam alignments.

Doerry, Armin Walter

2006-04-01T23:59:59.000Z

225

Accounting earnings and chief executive officer compensation: the joint effect of earnings' contracting and valuation roles  

E-Print Network [OSTI]

ACCOUNTING EARNINGS AND CHIEF EXECUTIVE OFFICER COMPENSATION: THE JOINT EFFECT OF EARNINGS? CONTRACTING AND VALUATION ROLES A Dissertation by YING CAO Submitted to the Office of Graduate Studies of Texas A... OF EARNINGS? CONTRACTING AND VALUATION ROLES A Dissertation by YING CAO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY...

Cao, Ying

2009-05-15T23:59:59.000Z

226

Complex Dynamics  

E-Print Network [OSTI]

Complex Dynamics Bernardo Da Costa, Koushik Ramachandran, Jingjing Qu, and I had a two semester learning seminar in complex analysis and potential...

227

University/Classified Non-Exempt OT Compensation The College of William and Mary/VIMS Banner ID # : Date  

E-Print Network [OSTI]

University/Classified Non-Exempt OT Compensation The College of William and Mary/VIMS Employer: W&M VIMS Banner ID # : Date: Employee Name: Last First Middle University/Classified Non-Exempt Overtime

Swaddle, John

228

EBT GAFCHROMIC{sup TM} film dosimetry in compensator-based intensity modulated radiation therapy  

SciTech Connect (OSTI)

The electron benefit transfer (EBT) GAFCHROMIC films possess a number of features making them appropriate for high-quality dosimetry in intensity-modulated radiation therapy (IMRT). Compensators to deliver IMRT are known to change the beam-energy spectrum as well as to produce scattered photons and to contaminate electrons; therefore, the accuracy and validity of EBT-film dosimetry in compensator-based IMRT should be investigated. Percentage-depth doses and lateral-beam profiles were measured using EBT films in perpendicular orientation with respect to 6 and 18 MV photon beam energies for: (1) different thicknesses of cerrobend slab (open, 1.0, 2.0, 4.0, and 6.0 cm), field sizes (55, 1010, and 2020 cm{sup 2}), and measurement depths (D{sub max}, 5.0 and 10.0 cm); and (2) step-wedged compensator in a solid phantom. To verify results, same measurements were implemented using a 0.125 cm{sup 3} ionization chamber in a water phantom and also in Monte Carlo simulations using the Monte Carlo N-particle radiation transport computer code. The mean energy of photons was increased due to beam hardening in comparison with open fields at both 6 and 18 MV energies. For a 2020 cm{sup 2} field size of a 6 MV photon beam and a 6.0 cm thick block, the surface dose decreased by about 12% and percentage-depth doses increased up to 3% at 30.0 cm depth, due to the beam-hardening effect induced by the block. In contrast, at 18 MV, the surface dose increased by about 8% and depth dose reduced by 3% at 30.0 cm depth. The penumbral widths (80% to 20%) increase with block thickness, field size, and beam energy. The EBT film results were in good agreement with the ionization chamber dose profiles and Monte Carlo N-particle radiation transport computer code simulation behind the step-wedged compensator. Also, there was a good agreement between the EBT-film and the treatment-planning results on the anthropomorphic phantom. The EBT films can be accurately used as a 2D dosimeter for dose verification and quality assurance of compensator-based C-IMRT.

Vaezzadeh, Seyedali [Department of Medical Physics and Biomedical Engineering, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of); Allahverdi, Mahmoud, E-mail: alahverdi@sina.tums.ac.ir [Department of Medical Physics and Biomedical Engineering, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of); Department of RadiotherapyOncology, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of); Nedaie, Hasan A. [Department of RadiotherapyOncology, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of); Ay, Mohammadreza [Department of Medical Physics and Biomedical Engineering, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of); Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of); Shirazi, Alireza; Yarahmadi, Mehran [Department of Medical Physics and Biomedical Engineering, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of)

2013-07-01T23:59:59.000Z

229

Biosystem Dynamics & Design | EMSL  

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

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

230

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

SciTech Connect (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

231

A high throughput (>90%), large compensation range, single-prism femtosecond pulse compressor  

E-Print Network [OSTI]

We demonstrate a high throughput, large compensation range, single-prism femtosecond pulse compressor, using a single prism and two roof mirrors. The compressor has zero angular dispersion, zero spatial dispersion, zero pulse-front tilt, and unity magnification. The high efficiency is achieved by adopting two roof mirrors as the retroreflectors. We experimentally achieved ~ -14500 fs2 group delay dispersion (GDD) with 30 cm of prism tip-roof mirror prism separation, and ~90.7% system throughput with the current implementation. With better components, the throughput can be even higher.

Kong, Lingjie

2013-01-01T23:59:59.000Z

232

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

SciTech Connect (OSTI)

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

233

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

SciTech Connect (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

234

Space Charge Compensation in Laser Particle Accelerators L.C. Steinhauer and W.D. Kimura  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBiSite CulturalDepartment2)isomeraseUSCharge Compensation in Laser

235

An analysis of weep holes as a product detection device for underground compensated LPG storage systems  

SciTech Connect (OSTI)

Weep holes have been used widely to detect the presence of Liquefied Petroleum Gases (LPG) in brine for underground compensated storage systems. When the brine level drops below the weep hole, LPG product enters the brine production system causing an increase in both tubing head pressure and flow rate. To prevent cavern overfill, a cavern shutdown is initiated upon detection of LPG in the surface brine system by pressure or flow instruments at the tubing head. In this study, we have investigated the multiphase flow characteristics of weep hole LPG detection systems to correctly estimate the operating limits. A simple and easy to use model has been developed to predict the tubing head pressure and flow rate increases. The model can be used to implement safer and more efficient operation procedures for underground compensated LPG storage systems. The model predictions for a typical field case are presented. An analysis of weep holes as product detection devices for LPG storage reservoirs has been carried out. It was found that the increases in pressure and flow rates at the tubing head change as a function of injection flow rate of the product. Therefore, a thorough consideration of cavern operating parameters is necessary to evaluate the use constant pressure and flow rate values to initiate emergency shut down of the cavern.

Sarica, C.; Demir, H.M.; Brill, J.P.

1996-09-01T23:59:59.000Z

236

A combined compensation method for the output voltage of an insulated core transformer power supply  

SciTech Connect (OSTI)

An insulated core transformer (ICT) power supply is an ideal high-voltage generator for irradiation accelerators with energy lower than 3 MeV. However, there is a significant problem that the structure of the segmented cores leads to an increase in the leakage flux and voltage differences between rectifier disks. A high level of consistency in the output of the disks helps to achieve a compact structure by improving the utilization of both the rectifier components and the insulation distances, and consequently increase the output voltage of the power supply. The output voltages of the disks which are far away from the primary coils need to be improved to reduce their inhomogeneity. In this study, by investigating and comparing the existing compensation methods, a new combined compensation method is proposed, which increases the turns on the secondary coils and employs parallel capacitors to improve the consistency of the disks, while covering the entire operating range of the power supply. This method turns out to be both feasible and effective during the development of an ICT power supply. The non-uniformity of the output voltages of the disks is less than 3.5% from no-load to full-load, and the power supply reaches an output specification of 350 kV/60 mA.

Yang, L.; Yang, J., E-mail: jyang@mail.hust.edu.cn; Liu, K. F.; Qin, B.; Chen, D. Z. [State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074 (China)

2014-06-15T23:59:59.000Z

237

Steady-State Flow-Force Compensation in a Hydraulic Spool Valve  

E-Print Network [OSTI]

A high-speed jet flowing inside of a partially-open hydraulic valve is accompanied by a reaction force, also referred to as flow force. The nature of this force has remained a mystery despite an extensive research effort spanning many decades. The momentum theory on the flow force by Lee and Blackburn (1952) explains the origin of the flow force and offers a design solution to shape the valve spool as a turbine bucket. It provides a model to calculate the compensated flow force as well. This paper shows that the model applies to a different flow case due to incorrect assumptions made. A corrected equation is presented based on a detailed analysis of the static-pressure distribution in the valve cavity as well as on a literature review of pressure loss in diffusers and nozzles. The new equation is based on the compensation taking place upstream of the valve orifice, not downstream as assumed by the momentum theory. The new model can be applied to chamfers or notches on the valve spool without the need to machi...

Lugowski, Jan

2013-01-01T23:59:59.000Z

238

Symbolic dynamics  

E-Print Network [OSTI]

This chapter presents some of the links between automata theory and symbolic dynamics. The emphasis is on two particular points. The first one is the interplay between some particular classes of automata, such as local automata and results on embeddings of shifts of finite type. The second one is the connection between syntactic semigroups and the classification of sofic shifts up to conjugacy.

Bal, M -P; Eilers, S; Perrin, D

2010-01-01T23:59:59.000Z

239

Demonstration of nonlinear-energy-spread compensation in relativistic electron bunches with corrugated structures  

E-Print Network [OSTI]

High quality electron beams with flat distributions in both energy and current are critical for many accelerator-based scientific facilities such as free-electron lasers and MeV ultrafast electron diffraction and microscopes. In this Letter we report on using corrugated structures to compensate for the beam nonlinear energy chirp imprinted by the curvature of the radio-frequency field, leading to a significant reduction in beam energy spread. By using a pair of corrugated structures with orthogonal orientations, we show that the quadrupole wake fields which otherwise increase beam emittance can be effectively canceled. This work also extends the applications of corrugated structures to the low beam charge (a few pC) and low beam energy (a few MeV) regime and may have a strong impact in many accelerator-based facilities.

Fu, Feichao; Zhu, Pengfei; Zhao, Lingrong; Jiang, Tao; Lu, Chao; Liu, Shengguang; Shi, Libin; Yan, Lixin; Deng, Haixiao; Feng, Chao; Gu, Qiang; Huang, Dazhang; Liu, Bo; Wang, Dong; Wang, Xingtao; Zhang, Meng; Zhao, Zhentang; Stupakov, Gennady; Xiang, Dao; Zhang, Jie

2015-01-01T23:59:59.000Z

240

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

SciTech Connect (OSTI)

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

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

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

242

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

243

Dynamic Voltage Regulation Using Distributed Energy Resources  

SciTech Connect (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

244

Abstract Reactive Power Compensation in Electric Systems is usually studied as a constrained Single-objective Optimization  

E-Print Network [OSTI]

Abstract Reactive Power Compensation in Electric Systems is usually studied as a constrained of calculation, better defined Pareto Front and a larger number of Pareto solutions. Index Terms Reactive Power.mail: {bbaran, jvallejo, rramos}@cnc.una.py). U. Fernández is with the National Electricity Administration

Coello, Carlos A. Coello

245

INSTRUCTIONS TO CONTRACTING OFFICERS: The Special Contract Requirement "Workers Compensation Insurance (Defense Base Act) Services (OCT 2008)"  

E-Print Network [OSTI]

INSTRUCTIONS TO CONTRACTING OFFICERS: The Special Contract Requirement "Workers Compensation Insurance (Defense Base Act) ­ Services (OCT 2008)" shall be included in the contract as applicable. Whenever Defense Base Act (DBA) insurance is required under the contract for services, the following

US Army Corps of Engineers

246

Off-line compensation of the tool path deviations on robotic machining: Application to Incremental Sheet Forming  

E-Print Network [OSTI]

Off-line compensation of the tool path deviations on robotic machining: Application to Incremental of industrial robots during an incremental sheet forming task. For that purpose, a robust and systematic method in a context of prototyping applications. Keywords: robot machining, elastic modeling, robot calibration

Paris-Sud XI, Université de

247

UCSD Medical Center Ergonomic Funding Assistance Form Purpose: The UCSD Medical Center Workers' Compensation Unit (WCU) currently has funds  

E-Print Network [OSTI]

UCSD Medical Center Ergonomic Funding Assistance Form Purpose: The UCSD Medical Center Workers' Compensation Unit (WCU) currently has funds available to assist departments implement ergonomic recommendations identified during an ergonomic assessment. This program will match up to 50% of the cost of identified

Gleeson, Joseph G.

248

Influence of feeding history on metabolic rates in fishes: evidence for metabolic compensation in largemouth bass (Micropterus salmoides)  

E-Print Network [OSTI]

Influence of feeding history on metabolic rates in fishes: evidence for metabolic compensation in largemouth bass (Micropterus salmoides) By Steven H. Ranney A thesis submitted in partial fulfillment technician Nathan Pool for having the patience necessary to bomb numerous fathead minnows and largemouth bass

249

Dynamic stability of running: The effects of speed and leg amputations on the maximal Lyapunov exponent  

SciTech Connect (OSTI)

In this paper, we study dynamic stability during running, focusing on the effects of speed, and the use of a leg prosthesis. We compute and compare the maximal Lyapunov exponents of kinematic time-series data from subjects with and without unilateral transtibial amputations running at a wide range of speeds. We find that the dynamics of the affected leg with the running-specific prosthesis are less stable than the dynamics of the unaffected leg and also less stable than the biological legs of the non-amputee runners. Surprisingly, we find that the center-of-mass dynamics of runners with two intact biological legs are slightly less stable than those of runners with amputations. Our results suggest that while leg asymmetries may be associated with instability, runners may compensate for this effect by increased control of their center-of-mass dynamics.

Look, Nicole [Department of Applied Mathematics, University of Colorado Boulder, Boulder, Colorado 80309 (United States)] [Department of Applied Mathematics, University of Colorado Boulder, Boulder, Colorado 80309 (United States); Arellano, Christopher J.; Grabowski, Alena M.; Kram, Rodger [Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado 80309 (United States)] [Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado 80309 (United States); McDermott, William J. [The Orthopedic Specialty Hospital, Murray, Utah 84107 (United States)] [The Orthopedic Specialty Hospital, Murray, Utah 84107 (United States); Bradley, Elizabeth [Department of Computer Science, University of Colorado Boulder, Boulder, Colorado 80309, USA and Santa Fe Institute, Santa Fe, New Mexico 87501 (United States)] [Department of Computer Science, University of Colorado Boulder, Boulder, Colorado 80309, USA and Santa Fe Institute, Santa Fe, New Mexico 87501 (United States)

2013-12-15T23:59:59.000Z

250

Flavor Dynamics  

E-Print Network [OSTI]

The purpose of BRAHMS is to survey the dynamics of relativistic heavy ion (as well as pp and d-A) collisions over a very wide range of rapidity and transverse momentum. The sum of these data may give us a glimpse of the initial state of the system, its transverse and longitudinal evolution and how the nature of the system changes with time. Here I will concentrate on the origin and dynamics of the light flavors, i.e. the creation and transport of the up, down and strange quarks. The results presented here are certainly not the end of the story. It is my hope that in a few years new detectors will reveal the rapidity dependence of the charm and bottom quarks.

Michael Murray; for the BRAHMS Collaboration

2007-10-24T23:59:59.000Z

251

Dynamic Positioning Simulator Dynamic Positioning Simulator  

E-Print Network [OSTI]

Simulator 5 / 24 #12;Dynamic Positioning Simulator Dynamic Positioning Why Dynamic Positioning? Advantages Dynamic Positioning: No tugboats needed; Offshore set-up is quick; Power saving; Precision situations more on Ship: Wind Force Fw = 1 2 air V 2 rw CXw (rw )AT 1 2 air V 2 rw CYw (rw )AL Mw = 1 2 air V 2 rw CMw (rw

Vuik, Kees

252

Design of a Solid-State Fast Voltage Compensator for klystron modulators requiring constant AC power consumption  

E-Print Network [OSTI]

This paper proposes a novel topological solution for klystron modulators integrating a Fast Voltage Compensator which allows an operation at constant power consumption from the utility grid. This kind of solution is mandatory for the CLIC project under study, which requires several hundreds of synchronously operated klystron modulators for a total pulsed power of 39 GW. The topology is optimized for the challenging CLIC specifications, which require a very precise output voltage flat-top as well as fast rise and fall times (3s). The Fast Voltage Compensator is integrated in the modulator such that it only has to manage the capacitor charger current and a fraction of the charging voltage. Consequently, its dimensioning power and cost is minimized.

Davide, Aguglia; Philippe, Viarouge; Jerome, Cros

2015-01-01T23:59:59.000Z

253

Investigation of charge compensation in indium-doped tin dioxide by hydrogen insertion via annealing under humid conditions  

SciTech Connect (OSTI)

The behavior of hydrogen (H) as an impurity in indium (In)-doped tin dioxide (SnO{sub 2}) was investigated by mass spectrometry analyses, with the aim of understanding the charge compensation mechanism in SnO{sub 2}. The H-concentration of the In-doped SnO{sub 2} films increased to (12)??10{sup 19}?cm{sup ?3} by annealing in a humid atmosphere (WET annealing). The electron concentration in the films also increased after WET annealing but was two orders of magnitude less than their H-concentrations. A self-compensation mechanism, based on the assumption that H sits at substitutional sites, is proposed to explain the mismatch between the electron- and H-concentrations.

Watanabe, Ken, E-mail: Watanabe.Ken@nims.go.jp [National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); International Center for Young Scientists (ICYS-MANA), NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Ohsawa, Takeo; Ross, Emily M., E-mail: emross@hmc.edu; Adachi, Yutaka; Haneda, Hajime [National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Sakaguchi, Isao; Takahashi, Ryosuke [National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Department of Applied Science for Electronics and Materials, Kyushu University, 6-1 Kasuga-kouen Kasuga, Fukuoka 816-8580 (Japan); Bierwagen, Oliver, E-mail: bierwagen@pdi-berlin.de [Paul-Drude-Institute, Hausvogteiplatz 5-7, 10117 Berlin (Germany); Materials Department, University of California, Santa Barbara, California 93106 (United States); White, Mark E.; Tsai, Min-Ying; Speck, James S., E-mail: speck@ucsb.edu [Materials Department, University of California, Santa Barbara, California 93106 (United States); Ohashi, Naoki, E-mail: Ohashi.Naoki@nims.go.jp [National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Department of Applied Science for Electronics and Materials, Kyushu University, 6-1 Kasuga-kouen Kasuga, Fukuoka 816-8580 (Japan); Materials Research Center for Element Strategy (MCES), Mailbox S2-13, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-0026 (Japan)

2014-03-31T23:59:59.000Z

254

Evaluation and Compensation of Detector Solenoid Effects on Disrupted Beam in the ILC 14 mrad Extraction Line  

SciTech Connect (OSTI)

This paper presents calculations of detector solenoid effects on disrupted primary beam in the ILC 14 mrad extraction line. Particle tracking simulations are performed for evaluation of primary beam loss along the line as well as of beam distribution and polarization at Compton Interaction Point. The calculations are done both without and with solenoid compensation. The results are obtained for the baseline ILC energy of 500 GeV center-of-mass and three options of beam parameters.

Toprek, Dragan; /VINCA Inst. Nucl. Sci., Belgrade; Nosochkov, Yuri; /SLAC

2008-12-18T23:59:59.000Z

255

Cybersecurity Dynamics Shouhuai Xu  

E-Print Network [OSTI]

Cybersecurity Dynamics Shouhuai Xu Department of Computer Science, University of Texas at San Antonio ABSTRACT We explore the emerging field of Cybersecurity Dynamics, a candidate foundation for the Science of Cybersecurity. Keywords Cybersecurity dynamics, security model, security analysis 1

Xu, Shouhuai

256

The incidence of popular complaints of farmers on land compensation : a case study of two villages in Dalian, Liaoning Province, China  

E-Print Network [OSTI]

The thesis analyzed the reason for the incidence of lodging popular complaints triggered by a land requisition in two villages in Dalian, Liaoning Province, China. The thesis only took the popular protests on land compensation ...

Li, Li, S.M. (Massachusetts Institute of Technology)

2006-01-01T23:59:59.000Z

257

IEEE Transactions on Power Apparatus and Systems, Vol. PAS-101, No. 6 June 1982 A TWO-STEP COMPENSATION METHOD FOR SOLVING SHORT CIRCUIT PROBLEMS  

E-Print Network [OSTI]

-STEP COMPENSATION METHOD FOR SOLVING SHORT CIRCUIT PROBLEMS G. Gross Pacific Gas and Electric Company San Francisco requires that three-phase systems be solved and the representa- tion of mutual couplings in the network

Gross, George

258

University of Virginia Agency 207 Accident Report for Workers' Compensation Claim Please complete this form and turn it in to your department's Human Resource Coordinator or  

E-Print Network [OSTI]

University of Virginia Agency 207 Accident Report for Workers' Compensation Claim Please complete Accident Reported: __________Reported Accident to:___________________________________ Was Supervisor(es)___________________________________________________________________ Information About the Nature and Cause of Accident Machine, tool, or object causing injury

Acton, Scott

259

Material dynamics under extreme conditions of pressure and strain rate  

SciTech Connect (OSTI)

Solid state experiments at extreme pressures (10-100 GPa) and strain rates ({approx}10{sup 6}-10{sup 8}s{sup -1}) are being developed on high-energy laser facilities, and offer the possibility for exploring new regimes of materials science. These extreme solid-state conditions can be accessed with either shock loading or with a quasi-isentropic ramped pressure drive. Velocity interferometer measurements establish the high pressure conditions. Constitutive models for solid-state strength under these conditions are tested by comparing 2D continuum simulations with experiments measuring perturbation growth due to the Rayleigh-Taylor instability in solid-state samples. Lattice compression, phase, and temperature are deduced from extended x-ray absorption fine structure (EXAFS) measurements, from which the shock-induced {alpha}-{omega} phase transition in Ti and the {alpha}-{var_epsilon} phase transition in Fe are inferred to occur on sub-nanosec time scales. Time resolved lattice response and phase can also be measured with dynamic x-ray diffraction measurements, where the elastic-plastic (1D-3D) lattice relaxation in shocked Cu is shown to occur promptly (< 1 ns). Subsequent large-scale molecular dynamics (MD) simulations elucidate the microscopic dynamics that underlie the 3D lattice relaxation. Deformation mechanisms are identified by examining the residual microstructure in recovered samples. The slip-twinning threshold in single-crystal Cu shocked along the [001] direction is shown to occur at shock strengths of {approx}20 GPa, whereas the corresponding transition for Cu shocked along the [134] direction occurs at higher shock strengths. This slip-twinning threshold also depends on the stacking fault energy (SFE), being lower for low SFE materials. Designs have been developed for achieving much higher pressures, P > 1000 GPa, in the solid state on the National Ignition Facility (NIF) laser.

Remington, B A; Allen, P; Bringa, E; Hawreliak, J; Ho, D; Lorenz, K T; Lorenzana, H; Meyers, M A; Pollaine, S W; Rosolankova, K; Sadik, B; Schneider, M S; Swift, D; Wark, J; Yaakobi, B

2005-09-06T23:59:59.000Z

260

Compensation of the AKT signaling by ERK signaling in transgenic mice hearts overexpressing TRIM72  

SciTech Connect (OSTI)

The AKT and ERK signaling pathways are known to be involved in cell hypertrophy, proliferation, survival and differentiation. Although there is evidence for crosstalk between these two signaling pathways in cellulo, there is less evidence for cross talk in vivo. Here, we show that crosstalk between AKT and ERK signaling in the hearts of TRIM72-overexpressing transgenic mice (TRIM72-Tg) with alpha-MHC promoter regulates and maintains their heart size. TRIM72, a heart- and skeletal muscle-specific protein, downregulates AKT-mTOR signaling via IRS-1 degradation and reduces the size of rat cardiomyocytes and the size of postnatal TRIM72-Tg hearts. TRIM72 expression was upregulated by hypertrophic inducers in cardiomyocytes, while IRS-1 was downregulated by IGF-1. TRIM72 specifically regulated IGF-1-dependent AKT-mTOR signaling, resulting in a reduction of the size of cardiomyocytes. Postnatal TRIM72-Tg hearts were smaller than control-treated hearts with inhibition of AKT-mTOR signaling. However, adult TRIM72-Tg hearts were larger than of control despite the suppression of AKT-mTOR signaling. Activation of ERK, PKC-?, and JNK were observed to be elevated in adult TRIM72-Tg, and these signals were mediated by ET-1 via the ET receptors A and B. Altogether, these results suggest that AKT signaling regulates cardiac hypertrophy in physiological conditions, and ERK signaling compensates for the absence of AKT signaling during TRIM72 overexpression, leading to pathological hypertrophy. -- Highlights: TRIM72 inhibits AKT signaling through ubiquitination of IRS-1 in cardiac cells. TRIM72 regulates the size of cardiac cells. TRIM72 regulates size of postnatal TRIM72-overexpressing transgenic mice hearts. Adult TRIM72-overexpressing transgenic mice hearts showed cardiac dysfunction. Adult TRIM72 transgenic mice hearts showed higher expression of endothelin receptors.

Ham, Young-Mi, E-mail: youngmi_ham@hms.harvard.edu [College of Life Science and Biotechnology, Korea University, Seoul (Korea, Republic of); Department of Cell Biology, Harvard Medical School, Boston, MA 02115 (United States); Mahoney, Sarah Jane [Department of Cell Biology, Harvard Medical School, Boston, MA 02115 (United States)

2013-06-10T23:59:59.000Z

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.


261

Voltage sensing systems and methods for passive compensation of temperature related intrinsic phase shift  

DOE Patents [OSTI]

A small sized electro-optic voltage sensor capable of accurate measurement of high levels of voltages without contact with a conductor or voltage source is provided. When placed in the presence of an electric field, the sensor receives an input beam of electromagnetic radiation into the sensor. A polarization beam displacer serves as a filter to separate the input beam into two beams with orthogonal linear polarizations. The beam displacer is oriented in such a way as to rotate the linearly polarized beams such that they enter a Pockels crystal at a preferred angle of 45 degrees. The beam displacer is therefore capable of causing a linearly polarized beam to impinge a crystal at a desired angle independent of temperature. The Pockels electro-optic effect induces a differential phase shift on the major and minor axes of the input beam as it travels through the Pockels crystal, which causes the input beam to be elliptically polarized. A reflecting prism redirects the beam back through the crystal and the beam displacer. On the return path, the polarization beam displacer separates the elliptically polarized beam into two output beams of orthogonal linear polarization representing the major and minor axes. In crystals that introduce a phase differential attributable to temperature, a compensating crystal is provided to cancel the effect of temperature on the phase differential of the input beam. The system may include a detector for converting the output beams into electrical signals, and a signal processor for determining the voltage based on an analysis of the output beams. The output beams are amplitude modulated by the frequency of the electric field and the amplitude of the output beams is proportional to the magnitude of the electric field, which is related to the voltage being measured.

Davidson, James R. (Idaho Falls, ID); Lassahn, Gordon D. (Idaho Falls, ID)

2001-01-01T23:59:59.000Z

262

Self-compensating fiber optic flow sensor having an end of a fiber optics element and a reflective surface within a tube  

DOE Patents [OSTI]

A flow rate fiber optic transducer is made self-compensating for both temperature and pressure by using preferably well-matched integral Fabry-Perot sensors symmetrically located around a cantilever-like structure. Common mode rejection signal processing of the outputs allows substantially all effects of both temperature and pressure to be compensated. Additionally, the integral sensors can individually be made insensitive to temperature.

Peng, Wei; Qi, Bing; Wang, Anbo

2006-05-16T23:59:59.000Z

263

Protein Dynamics and Biocatalysis  

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

Protein Dynamics and Biocatalysis Protein Dynamics and Biocatalysis 1998 Annual Report Grand Challenge Projects biocatalysis.gif A model of the Michaelis complex for the TEM-1...

264

This document downloaded from www.microgrids.et.aau.dk is a preprint version from the paper: L. Meng, T. Dragicevic, J.M. Guerrero, J.C. Vasquez, M. Savaghebi, F. Tang, "Agent-based distributed unbalance compensation for optimal power quality in  

E-Print Network [OSTI]

-based Distributed Unbalance Compensation for Optimal Power Quality in Islanded Microgrids Lexuan Meng, Tomislav, the distributed generators (DG) can be used as distributed compensators so as to compensate the voltage unbalances as to compensate the unbalances at the critical bus. In case of microgrids, distributed generators (DGs) can

Vasquez, Juan Carlos

265

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

SciTech Connect (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

266

Accelerated molecular dynamics methods  

SciTech Connect (OSTI)

The molecular dynamics method, although extremely powerful for materials simulations, is limited to times scales of roughly one microsecond or less. On longer time scales, dynamical evolution typically consists of infrequent events, which are usually activated processes. This course is focused on understanding infrequent-event dynamics, on methods for characterizing infrequent-event mechanisms and rate constants, and on methods for simulating long time scales in infrequent-event systems, emphasizing the recently developed accelerated molecular dynamics methods (hyperdynamics, parallel replica dynamics, and temperature accelerated dynamics). Some familiarity with basic statistical mechanics and molecular dynamics methods will be assumed.

Perez, Danny [Los Alamos National Laboratory

2011-01-04T23:59:59.000Z

267

assimilating seizure dynamics: Topics by E-print Network  

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

Observations with the Geosciences Websites Summary: ) by augmenting the observa- 1 The SSI was the operational 3D-Var data assimilation system of NCEP until April-A Level 1B...

268

E. P. R. CHARACTERIZATION OF p-TYPE AS GROWN AND Cl-COMPENSATED THM GROWN CdTe  

E-Print Network [OSTI]

199 E. P. R. CHARACTERIZATION OF p-TYPE AS GROWN AND Cl-COMPENSATED THM GROWN CdTe A. GOLTZENE électronique ont été observés dans du CdTe de haute résistivité, de type p ; à 4 K, on observe toujours des intense à g = 1,830 ± 0,002. Dans CdTe, fortement dopé au Cl, une raie à g = 2,003 ± 0,001 est déjà

Boyer, Edmond

269

Radical advancement in multi-spectral imaging for autonomous vehicles (UAVs, UGVs, and UUVs) using active compensation.  

SciTech Connect (OSTI)

The purpose of this LDRD was to demonstrate a compact, multi-spectral, refractive imaging systems using active optical compensation. Compared to a comparable, conventional lens system, our system has an increased operational bandwidth, provides for spectral selectivity and, non-mechanically corrects aberrations induced by the wavelength dependent properties of a passive refractive optical element (i.e. lens). The compact nature and low power requirements of the system lends itself to small platforms such as autonomous vehicles. In addition, the broad spectral bandwidth of our system would allow optimized performance for both day/night use, and the multi-spectral capability allows for spectral discrimination and signature identification.

Clark, Brian F.; Bagwell, Brett E.; Wick, David Victor

2007-01-01T23:59:59.000Z

270

The paradigm of kinematics and dynamics must yield to causal structure  

E-Print Network [OSTI]

The distinction between a theory's kinematics and its dynamics, that is, between the space of physical states it posits and its law of evolution, is central to the conceptual framework of many physicists. A change to the kinematics of a theory, however, can be compensated by a change to its dynamics without empirical consequence, which strongly suggests that these features of the theory, considered separately, cannot have physical significance. It must therefore be concluded (with apologies to Minkowski) that henceforth kinematics by itself, and dynamics by itself, are doomed to fade away into mere shadows, and only a kind of union of the two will preserve an independent reality. The notion of causal structure seems to provide a good characterization of this union.

Robert W. Spekkens

2012-08-31T23:59:59.000Z

271

Dynamics of the Coupled Human-climate System Resulting from Closed-loop Control of Solar Geoengineering  

SciTech Connect (OSTI)

If solar radiation management (SRM) were ever implemented, feedback of the observed climate state might be used to adjust the radiative forcing of SRM, in order to compensate for uncertainty in either the forcing or the climate response; this would also compensate for unexpected changes in the system, e.g. a nonlinear change in climate sensitivity. This feedback creates an emergent coupled human-climate system, with entirely new dynamics. In addition to the intended response to greenhouse-gas induced changes, the use of feedback would also result in a geoengineering response to natural climate variability. We use a simple box-diffusion dynamic model to understand how changing feedback-control parameters and time delay affect the behavior of this coupled natural-human system, and verify these predictions using the HadCM3L general circulation model. In particular, some amplification of natural variability is unavoidable; any time delay (e.g., to average out natural variability, or due to decision-making) exacerbates this amplification, with oscillatory behavior possible if there is a desire for rapid correction (high feedback gain), but a delayed response needed for decision making. Conversely, the need for feedback to compensate for uncertainty, combined with a desire to avoid excessive amplification, results in a limit on how rapidly SRM could respond to uncertain changes.

MacMartin, Douglas; Kravitz, Benjamin S.; Keith, David; Jarvis, Andrew

2014-07-08T23:59:59.000Z

272

Tariffs with Dynamic Supply Response  

E-Print Network [OSTI]

Giannini FDN iibrary TARIFFS WITH DYNAMIC SUPPLY RESWNSEpaper studies the optimal tariff in a dynamic framework. Thesellers, the optimal tariff is dynam- ically inconsistent;

Karp, Larry

1985-01-01T23:59:59.000Z

273

Essays in dynamic contracting  

E-Print Network [OSTI]

This thesis examines three models of dynamic contracting. The first model is a model of dynamic moral hazard with partially persistent states, and the second model considers relational contracts when the states are partially ...

Kwon, Suehyun

2012-01-01T23:59:59.000Z

274

Dynamics of structural priming  

E-Print Network [OSTI]

for understanding various aspects of syntactic priming. Cognitive processes are modelled as dynamical systems that can change their behaviour when they process information. We use these dynamical systems to investigate how each episode of language comprehension...

Malhotra, Gaurav

2009-01-01T23:59:59.000Z

275

Categorical Introduction to Dynamical Systems Symbolic Dynamical Systems  

E-Print Network [OSTI]

Categorical Introduction to Dynamical Systems Symbolic Dynamical Systems Symbolic Embedding Examples Results Embeddings in Symbolic Dynamical Systems Jonathan Jaquette Swarthmore College July 22, 2009 Jonathan Jaquette Embeddings in Symbolic Dynamical Systems #12;Categorical Introduction

Kahng, Byung-Jay

276

Dynamics of Carroll Particles  

E-Print Network [OSTI]

We investigate particles whose dynamics is invariant under the Carroll group. Although a single free such Carroll particle has no non-trivial dynamics (`the Carroll particle does not move') we show that there exists non-trivial dynamics for a set of interacting Carroll particles. Furthermore, we gauge the Carroll algebra and couple the Carroll particle to these gauge fields. It turns out that for such a coupled system even a single Carroll particle can have non-trivial dynamics.

Eric Bergshoeff; Joaquim Gomis; Giorgio Longhi

2014-05-31T23:59:59.000Z

277

Intramolecular and nonlinear dynamics  

SciTech Connect (OSTI)

Research in this program focuses on three interconnected areas. The first involves the study of intramolecular dynamics, particularly of highly excited systems. The second area involves the use of nonlinear dynamics as a tool for the study of molecular dynamics and complex kinetics. The third area is the study of the classical/quantum correspondence for highly excited systems, particularly systems exhibiting classical chaos.

Davis, M.J. [Argonne National Laboratory, IL (United States)

1993-12-01T23:59:59.000Z

278

Dynamics of Anisotropic Universes  

E-Print Network [OSTI]

We present a general study of the dynamical properties of Anisotropic Bianchi Universes in the context of Einstein General Relativity. Integrability results using Kovalevskaya exponents are reported and connected to general knowledge about Bianchi dynamics. Finally, dynamics toward singularity in Bianchi type VIII and IX universes are showed to be equivalent in some precise sence.

Jerome Perez

2006-03-30T23:59:59.000Z

279

Atmospheric Dynamics II Instructor  

E-Print Network [OSTI]

AT602 Atmospheric Dynamics II 2 credits Instructor: David W. J. Thompson davet: An Introduction to Dynamic Meteorology, 5th Edition, Academic Press (recommended) · Marshall, J., and Plumb, R. A., 2008: Atmosphere, Ocean, and Climate Dynamics: An Introductory Text, Academic Press. · Vallis, G. K

280

Luminescent systems based on the isolation of conjugated PI systems and edge charge compensation with polar molecules on a charged nanostructured surface  

DOE Patents [OSTI]

A photoluminescent or electroluminescent system and method of making a non-luminescent nanostructured material into such a luminescent system is presented. The method of preparing the luminescent system, generally, comprises the steps of modifying the surface of a nanostructured material to create isolated regions to act as luminescent centers and to create a charge imbalance on the surface; applying more than one polar molecule to the charged surface of the nanostructured material; and orienting the polar molecules to compensate for the charge imbalance on the surface of the nanostructured material. The compensation of the surface charge imbalance by the polar molecules allows the isolated regions to exhibit luminescence.

Ivanov, Ilia N.; Puretzky, Alexander A.; Zhao, Bin; Geohegan, David B.; Styers-Barnett, David J.; Hu, Hui

2014-07-15T23:59:59.000Z

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.


281

Space-charge compensation measurements in electron cyclotron resonance ion source low energy beam transport lines with a retarding field analyzer  

SciTech Connect (OSTI)

In this paper we describe the first systematic measurement of beam neutralization (space charge compensation) in the ECR low energy transport line with a retarding field analyzer, which can be used to measure the potential of the beam. Expected trends for the space charge compensation levels such as increase with residual gas pressure, beam current, and beam density could be observed. However, the overall levels of neutralization are consistently low (<60%). The results and the processes involved for neutralizing ion beams are discussed for conditions typical for ECR injector beam lines. The results are compared to a simple theoretical beam plasma model as well as simulations.

Winklehner, D.; Leitner, D., E-mail: leitnerd@nscl.msu.edu; Cole, D.; Machicoane, G.; Tobos, L. [National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)] [National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)

2014-02-15T23:59:59.000Z

282

First-principles study of compensation mechanisms in negatively charged LaGaO3/MgAl2O4 interfaces  

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

Thin film oxide heterostructures with a bound charge at the interface require electrical compensation, which can involve redistribution of mobile charge carriers. We explore a model LaGaO3(001)//MgAl2O4(001) heterostructure with nominally negatively charged interfaces using first-principles methods and a Poisson-Boltzmann equation. We find that charge compensation by oxygen vacancies with quadratically decaying concentration away from the interface is more favorable than electronic redistribution. These vacancies have a potential to enhance ionic conductivity along the interfaces.

Rbola, Alejandro; Fong, Dillon D.; Eastman, Jeffrey A.; ?t, Serdar; Zapol, Peter

2013-06-01T23:59:59.000Z

283

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

SciTech Connect (OSTI)

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

284

Dynamical friction in modified Newtonian dynamics  

E-Print Network [OSTI]

We have tested a previous analytical estimate of the dynamical friction timescale in Modified Newtonian Dynamics (MOND) with fully non-linear N-body simulations. The simulations confirm that the dynamical friction timescale is significantly shorter in MOND than in equivalent Newtonian systems, i.e. systems with the same phase-space distribution of baryons and additional dark matter. An apparent conflict between this result and the long timescales determined for bars to slow and mergers to be completed in previous N-body simulations of MOND systems is explained. The confirmation of the short dynamical-friction timescale in MOND underlines the challenge that the Fornax dwarf spheroidal poses to the viability of MOND.

C. Nipoti; L. Ciotti; J. Binney; P. Londrillo

2008-03-31T23:59:59.000Z

285

Some characteristics of dynamic pressure measurements in an internal combustion engine, and a method of compensation for the errors in the measuring system  

E-Print Network [OSTI]

, Therefore, rapid voltages appeared across the cell corresponding to each of the aluminum markers. One of the alum&num markers was made larger than the others. The increased Light reflected to the phoroconductive cell caused a smaller voltage drop across...

Norton, David Jerry

1963-01-01T23:59:59.000Z

286

Decommissioning of U.S. Department of Energy surplus facilities under the Comprehensive Environmental Response, Compensation, and Liability Act  

SciTech Connect (OSTI)

The US Department of Energy (DOE) has identified more than 850 contaminated surplus facilities that require decommissioning through the environmental restoration program. This paper discusses the regulatory framework for decommissioning these facilities, specifically the framework established by the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). CERCLA jurisdiction covers releases of hazardous substances to the environment, substantial threats of such releases, and responses to these situations. DOE has determined that the use of CERCLA removal action authority is the appropriate means of responding to releases or threats of releases from contaminated surplus facilities under the jurisdiction, custody, or control of the Department. This paper focuses on the policy and process for decommissioning contaminated surplus facilities. Not all surplus facilities to be decommissioned will fall under CERCLA jurisdiction. In all instances, however, the same basic process will still be followed and a graded approach will be applied, consistent with DOE orders.

Warren, S. [Dept. of Energy, Germantown, MD (United States); Dorries, J. [Booz, Allen and Hamilton Inc., Germantown, MD (United States)

1996-08-01T23:59:59.000Z

287

Precise method of compensating radiation-induced errors in a hot-cathode-ionization gauge with correcting electrode  

SciTech Connect (OSTI)

To compensate pressure-measurement errors caused by a synchrotron radiation environment, a precise method using a hot-cathode-ionization-gauge head with correcting electrode, was developed and tested in a simulation experiment with excess electrons in the SPring-8 storage ring. This precise method to improve the measurement accuracy, can correctly reduce the pressure-measurement errors caused by electrons originating from the external environment, and originating from the primary gauge filament influenced by spatial conditions of the installed vacuum-gauge head. As the result of the simulation experiment to confirm the performance reducing the errors caused by the external environment, the pressure-measurement error using this method was approximately less than several percent in the pressure range from 10{sup ?5} Pa to 10{sup ?8} Pa. After the experiment, to confirm the performance reducing the error caused by spatial conditions, an additional experiment was carried out using a sleeve and showed that the improved function was available.

Saeki, Hiroshi, E-mail: saeki@spring8.or.jp; Magome, Tamotsu, E-mail: saeki@spring8.or.jp [Japan Synchrotron Radiation Research Institute, SPring-8, Kohto 1-1-1, Sayo, Hyogo 679-5198 (Japan)

2014-10-06T23:59:59.000Z

288

HOMOGENEITY ALONG Cl-COMPENSATED THM GROWN CdTe INGOT NGO-TICH-PHUOC, G. M. MARTIN, C. BELIN and E. FABRE  

E-Print Network [OSTI]

195 HOMOGENEITY ALONG Cl-COMPENSATED THM GROWN CdTe INGOT NGO-TICH-PHUOC, G. M. MARTIN, C. BELIN resistivity CdTe is believed to present some potentialities as a material for y-rays detection at room carried out [8-9]. This paper presents an assessment of Cl-compen- sated, THM grown CdTe ingots : emphasis

Paris-Sud XI, Université de

289

Nanoindentation Under Dynamic Conditions  

E-Print Network [OSTI]

............................................................................................ 98 6.3.1 Data Analysis ........................................................................................... 99 6.3.2 Dynamic Compliance ............................................................................. 103 6.3.3 Strain Rates...

Wheeler, Jeffrey M

2009-05-22T23:59:59.000Z

290

Shape Dynamics. An Introduction  

E-Print Network [OSTI]

Shape dynamics is a completely background-independent universal framework of dynamical theories from which all absolute elements have been eliminated. For particles, only the variables that describe the shapes of the instantaneous particle configurations are dynamical. In the case of Riemannian three-geometries, the only dynamical variables are the parts of the metric that determine angles. The local scale factor plays no role. This leads to a shape-dynamic theory of gravity in which the four-dimensional diffeomorphism invariance of general relativity is replaced by three-dimensional diffeomorphism invariance and three-dimensional conformal invariance. Despite this difference of symmetry groups, it is remarkable that the predictions of the two theories -- shape dynamics and general relativity -- agree on spacetime foliations by hypersurfaces of constant mean extrinsic curvature. However, the two theories are distinct, with shape dynamics having a much more restrictive set of solutions. There are indications that the symmetry group of shape dynamics makes it more amenable to quantization and thus to the creation of quantum gravity. This introduction presents in simple terms the arguments for shape dynamics, its implementation techniques, and a survey of existing results.

Julian Barbour

2011-05-01T23:59:59.000Z

291

Social Dynamics Introduction  

E-Print Network [OSTI]

: University of Utah Press. 47-69. Part II: Importance of Dynamics Introduction to part II 1. Trust, Risk Jason Alexander) (1999) The Journal of Philosophy. 96: 588-598. 3. Stability and Explanatory Significance of Some Simple Evolutionary Models (2000) Philosophy of Science 67: 94-113. 4. Dynamics

Barrett, Jeffrey A.

292

Seminar N 03301, Dynamically  

E-Print Network [OSTI]

Seminar Nº 03301, Dynamically Reconfigurable Architectures A Mead-&-Conway-like Break ·Ametek ·Applied Dynamics ·Astronautics ·BBN ·CDC ·Convex ·Cray Computer ·Cray Research ·Culler-Harris

Hartenstein, Reiner

293

Why do mixed quantum-classical methods describe short-time dynamics through conical intersections so well? Analysis of geometric phase effects  

E-Print Network [OSTI]

Adequate simulation of non-adiabatic dynamics through conical intersection requires account for a non-trivial geometric phase (GP) emerging in electronic and nuclear wave-functions in the adiabatic representation. Popular mixed quantum-classical (MQC) methods, surface hopping and Ehrenfest, do not carry a nuclear wave-function to be able to incorporate the GP into nuclear dynamics. Surprisingly, the MQC methods reproduce ultra-fast interstate crossing dynamics generated with the exact quantum propagation so well as if they contained information about the GP. Using two-dimensional linear vibronic coupling models we unravel how the MQC methods can effectively mimic the most significant dynamical GP effects: 1) compensation for repulsive diagonal second order non-adiabatic couplings and 2) transfer enhancement for a fully cylindrically symmetric component of a nuclear distribution.

Gherib, Rami; Izmaylov, Artur F

2015-01-01T23:59:59.000Z

294

Photovoltaic solar system connected to the electric power grid operating as active power generator and reactive power compensator  

SciTech Connect (OSTI)

In the case of photovoltaic (PV) systems acting as distributed generation (DG) systems, the DC energy that is produced is fed to the grid through the power-conditioning unit (inverter). The majority of contemporary inverters used in DG systems are current source inverters (CSI) operating at unity power factor. If, however, we assume that voltage source inverters (VSI) can replace CSIs, we can generate reactive power proportionally to the remaining unused capacity at any given time. According to the theory of instantaneous power, the inverter reactive power can be regulated by changing the amplitude of its output voltage. In addition, the inverter active power can be adjusted by modifying the phase angle of its output voltage. Based on such theory, both the active power supply and the reactive power compensation (RPC) can be carried out simultaneously. When the insolation is weak or the PV modules are inoperative at night, the RPC feature of a PV system can still be used to improve the inverter utilisation factor. Some MATLAB simulation results are included here to show the feasibility of the method. (author)

Albuquerque, Fabio L.; Moraes, Adelio J.; Guimaraes, Geraldo C.; Sanhueza, Sergio M.R.; Vaz, Alexandre R. [Universidade Federal de Uberlandia, Uberlandia-MG, CEP 38400-902 (Brazil)

2010-07-15T23:59:59.000Z

295

On the behavior of Bi in a CdTe lattice and the compensation effect in CdTe:Bi  

SciTech Connect (OSTI)

CdTe crystals of two types have been grown by the vertical Bridgman method: (i) crystals doped with Bi to {approx}10{sup 18} cm{sup -3} and (ii) double-doped (Bi + Cl) crystals with a Bi concentration of {approx}10{sup 18} cm{sup -3} and a Cl concentration of {approx}10{sup 17} cm{sup -3}. The temperature dependences of the resistivity, photoconductivity, and low-temperature photoluminescence are investigated for the crystals grown. Analysis has shown that doping with Bi (crystals of the first type) leads to compensation of the material. The resistivity of the CdTe:Bi samples at room temperature, depending on the doping level, is varied in the range of 10{sup 5}-10{sup 9} {Omega} cm. The hole concentration is determined by the acceptor level at E{sub v} + 0.4 eV in lightly doped CdTe:Bi samples and by the deep center at E{sub v} + 0.72 eV in heavily doped CdTe:Bi samples. Double doping leads to inversion of the conductivity type and reduces the resistivity to {approx}1 {Omega} cm. Heavily doped CdTe:Bi crystals and double-doped crystals exhibit the presence of acceptors with an ionization energy of 36 meV, which is atypical of CdTe.

Kolosov, S. A., E-mail: kolosov@sci.lebedev.ru; Krivobok, V. S., E-mail: krivobok@sci.lebedev.ru; Klevkov, Yu. V.; Adiyatullin, A. F. [Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)

2013-04-15T23:59:59.000Z

296

Precision laser surveying instrument using atmospheric turbulence compensation by determining the absolute displacement between two laser beam components  

DOE Patents [OSTI]

Atmospheric effects on sighting measurements are compensated for by adjusting any sighting measurements using a correction factor that does not depend on atmospheric state conditions such as temperature, pressure, density or turbulence. The correction factor is accurately determined using a precisely measured physical separation between two color components of a light beam (or beams) that has been generated using either a two-color laser or two lasers that project different colored beams. The physical separation is precisely measured by fixing the position of a short beam pulse and measuring the physical separation between the two fixed-in-position components of the beam. This precisely measured physical separation is then used in a relationship that includes the indexes of refraction for each of the two colors of the laser beam in the atmosphere through which the beam is projected, thereby to determine the absolute displacement of one wavelength component of the laser beam from a straight line of sight for that projected component of the beam. This absolute displacement is useful to correct optical measurements, such as those developed in surveying measurements that are made in a test area that includes the same dispersion effects of the atmosphere on the optical measurements. The means and method of the invention are suitable for use with either single-ended systems or a double-ended systems.

Veligdan, James T. (Manorville, NY)

1993-01-01T23:59:59.000Z

297

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

2010-12-09T23:59:59.000Z

298

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 fun...

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

2010-01-01T23:59:59.000Z

299

Los Alamos Dynamics Summer School  

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

School The Sixteenth Los Alamos Dynamics Summer School EXTENDED DEADLINES Los Alamos Dynamics Summer School Overview Contact Institute Director Charles Farrar (505) 663-5330...

300

Beam Dynamics for Induction Accelerators  

E-Print Network [OSTI]

Dynamics for Induction Accelerators Edward P. Lee Lawrencea natural candidate accelerator for a heavy ion fusion (HIF)words: Fusion, Induction, Accelerators, Dynamics This work

Lee, E.P.

2014-01-01T23:59:59.000Z

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.


301

Studies in Nonlinear Dynamics & Econometrics  

E-Print Network [OSTI]

Studies in Nonlinear Dynamics & Econometrics Volume 8, Issue 3 2004 Article 1 The Long Memory in Nonlinear Dynamics & Econometrics is produced by The Berkeley Electronic Press (bepress). http

302

Dynamic Prediction of Concurrency Errors  

E-Print Network [OSTI]

Relation 15 Must-Before Race Prediction 16 Implementation 17viii Abstract Dynamic Prediction of Concurrency Errors bySANTA CRUZ DYNAMIC PREDICTION OF CONCURRENCY ERRORS A

Sadowski, Caitlin

2012-01-01T23:59:59.000Z

303

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

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartment of Energyof the Americas |DOE Former Worker/Energy Compensation CAIRS Central

304

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

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartment of Energyof the Americas |DOE Former Worker/Energy Compensation CAIRS CentralPage

305

Towards a Hybrid Dynamic Logic for Hybrid Dynamic Systems1  

E-Print Network [OSTI]

HyLo 2006 Towards a Hybrid Dynamic Logic for Hybrid Dynamic Systems1 Andr´e Platzer2 Carnegie platzer@informatik.uni-oldenburg.de Abstract We introduce a hybrid variant of a dynamic logic for this extended hybrid dynamic logic. With the addition of satisfaction operators, this hybrid logic provides

Platzer, André

306

The Dynamical Challenge  

E-Print Network [OSTI]

Recent studies such as Thelen and Smith (1994), Kelso (1995), Van Gelder (1995), Beer (1995), and others have presented a forceful case for a dynamical systems approach to understanding cognition and adaptive behavior. ...

Clark, Andy

1997-01-01T23:59:59.000Z

307

Dynamic Instruction Fusion  

E-Print Network [OSTI]

File Size Dynamic Read Energy (nJ) # of Ports Figure 17:with fewer ports, are much less expensive energy-wise. By Energy by Register File Size Leakage Power (mW) # of Ports

Lee, Ian

2012-01-01T23:59:59.000Z

308

Dynamics of Nanoconfined Acetonitrile  

E-Print Network [OSTI]

The results of dynamics simulations of confined acetonitrile are presented. Confinement is achieved by filling previously formed silica pores having hydroxyl-terminated head groups with liquid acetonitrile. These pores are of the same nominal radius...

Norton, Cassandra

2011-04-27T23:59:59.000Z

309

Dynamics in Formal Argumentation  

E-Print Network [OSTI]

by constructing and weighing up arguements intended to give support in favour or against alternative conclusions. In dynamic argumentation, such arguements may be revised and strengthened in order yo increase to decrease the acceptability of controversial...

Carbogim, Daniela Vasconcelos

310

Testing dynamically reconfigurable FPGAs  

E-Print Network [OSTI]

In this work, testing methods are proposed to test the ics. logic resources and the interconnect structure of dynamically reconfigurable FPGAS. Testing methods are also proposed for testing the dedicated CPU interface in these FPGAS. A BIST...

Ruiwale, Sameer Jagadish

1998-01-01T23:59:59.000Z

311

Photochemical reaction dynamics  

SciTech Connect (OSTI)

The purpose of the program is to develop a fundamental understanding of unimolecular and bimolecular reaction dynamics with application in combustion and energy systems. The energy dependence in ketene isomerization, ketene dissociation dynamics, and carbonyl substitution on organometallic rhodium complexes in liquid xenon have been studied. Future studies concerning unimolecular processes in ketene as well as energy transfer and kinetic studies of methylene radicals are discussed.

Moore, B.C. [Lawrence Berkeley Laboratory, Livermore, CA (United States)

1993-12-01T23:59:59.000Z

312

Local Writhing Dynamics  

E-Print Network [OSTI]

We present an alternative local definition of the writhe of a self-avoiding closed loop which differs from the traditional non-local definition by an integer. When studying dynamics this difference is immaterial. We employ a formula due to Aldinger, Klapper and Tabor for the change in writhe and propose a set of local, link preserving dynamics in an attempt to unravel some puzzles about actin.

Randall D. Kamien

1997-03-13T23:59:59.000Z

313

Multipulsed dynamic moire interferometer  

DOE Patents [OSTI]

An improved dynamic moire interferometer 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.

Deason, Vance A. (Idaho Falls, ID)

1991-01-01T23:59:59.000Z

314

M. Flierl: Coding of Multiview Imagery with Motion and Disparity Compensated Orthogonal Transforms, IEEE ICIP, San Antonio, TX, Sep. 2007. 1 CODING OF MULTIVIEW IMAGERY WITH MOTION AND DISPARITY  

E-Print Network [OSTI]

that so called motion-compensated lifted wavelets may substantially deviate from orthonormality due to mo viewpoint video [1] to free viewpoint television (FTV) [2]. All of them require efficient coding

Flierl, Markus

315

Evaluation of plastic materials for range shifting, range compensation, and solid-phantom dosimetry in carbon-ion radiotherapy  

SciTech Connect (OSTI)

Purpose: Beam range control is the essence of radiotherapy with heavy charged particles. In conventional broad-beam delivery, fine range adjustment is achieved by insertion of range shifting and compensating materials. In dosimetry, solid phantoms are often used for convenience. These materials should ideally be equivalent to water. In this study, the authors evaluated dosimetric water equivalence of four common plastics, high-density polyethylene (HDPE), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), and polyoxymethylene (POM). Methods: Using the Bethe formula for energy loss, the Gottschalk formula for multiple scattering, and the Sihver formula for nuclear interactions, the authors calculated the effective densities of the plastics for these interactions. The authors experimentally measured variation of the Bragg peak of carbon-ion beams by insertion of HDPE, PMMA, and POM, which were compared with analytical model calculations. Results: The theoretical calculation resulted in slightly reduced multiple scattering and severely increased nuclear interactions for HDPE, compared to water and the other plastics. The increase in attenuation of carbon ions for 20-cm range shift was experimentally measured to be 8.9% for HDPE, 2.5% for PMMA, and 0.0% for POM while PET was theoretically estimated to be in between PMMA and POM. The agreement between the measurements and the calculations was about 1% or better. Conclusions: For carbon-ion beams, POM was dosimetrically indistinguishable from water and the best of the plastics examined in this study. The poorest was HDPE, which would reduce the Bragg peak by 0.45% per cm range shift, although with marginal superiority for reduced multiple scattering. Between the two clear plastics, PET would be superior to PMMA in dosimetric water equivalence.

Kanematsu, Nobuyuki; Koba, Yusuke; Ogata, Risa [Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555 (Japan)

2013-04-15T23:59:59.000Z

316

The ethics of dynamic pricing  

SciTech Connect (OSTI)

Dynamic pricing has garnered much interest among regulators and utilities, since it has the potential for lowering energy costs for society. But the deployment of dynamic pricing has been remarkably tepid. The underlying premise is that dynamic pricing is unfair. But the presumption of unfairness in dynamic pricing rests on an assumption of fairness in today's tariffs. (author)

Faruqui, Ahmad

2010-07-15T23:59:59.000Z

317

Substructured multibody molecular dynamics.  

SciTech Connect (OSTI)

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

318

Quantum spin dynamics  

E-Print Network [OSTI]

The classical Landau-Lifshitz equation has been derived from quantum mechanics. Starting point is the assumption of a non-Hermitian Hamilton operator to take the energy dissipation into account. The corresponding quantum mechanical time dependent Schr\\"odinger, Liouville and Heisenberg equation have been described and the similarities and differences between classical and quantum mechanical spin dynamics have been discussed. Furthermore, a time dependent Schr\\"odinger equation corresponding to the classical Landau-Lifshitz-Gilbert equation and two ways to include temperature into the quantum mechanical spin dynamics have been proposed.

Robert Wieser

2014-10-23T23:59:59.000Z

319

Dynamics of black holes  

E-Print Network [OSTI]

This is a review of current theory of black-hole dynamics, concentrating on the framework in terms of trapping horizons. Summaries are given of the history, the classical theory of black holes, the defining ideas of dynamical black holes, the basic laws, conservation laws for energy and angular momentum, other physical quantities and the limit of local equilibrium. Some new material concerns how processes such as black-hole evaporation and coalescence might be described by a single trapping horizon which manifests temporally as separate horizons.

Sean A. Hayward

2009-02-28T23:59:59.000Z

320

View dependent fluid dynamics  

E-Print Network [OSTI]

VIEW DEPENDENT FLUID DYNAMICS A Thesis by BRIAN ARTHUR BARRAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 2006 Major Subject: Visualization... Sciences VIEW DEPENDENT FLUID DYNAMICS A Thesis by BRIAN ARTHUR BARRAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved by: Chair of Committee, Donald...

Barran, Brian Arthur

2006-08-16T23:59:59.000Z

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

Introduction to Accelerated Molecular Dynamics  

SciTech Connect (OSTI)

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

322

Electronic Spectroscopy & Dynamics  

SciTech Connect (OSTI)

The Gordon Research Conference (GRC) on Electronic Spectroscopy and Dynamics was held at Colby College, Waterville, NH from 07/19/2009 thru 07/24/2009. The Conference was well-attended with participants (attendees list attached). The attendees represented the spectrum of endeavor in this field coming from academia, industry, and government laboratories, both U.S. and foreign scientists, senior researchers, young investigators, and students. The GRC on Electronic Spectroscopy & Dynamics showcases some of the most recent experimental and theoretical developments in electronic spectroscopy that probes the structure and dynamics of isolated molecules, molecules embedded in clusters and condensed phases, and bulk materials. Electronic spectroscopy is an important tool in many fields of research, and this GRC brings together experts having diverse backgrounds in physics, chemistry, biophysics, and materials science, making the meeting an excellent opportunity for the interdisciplinary exchange of ideas and techniques. Topics covered in this GRC include high-resolution spectroscopy, biological molecules in the gas phase, electronic structure theory for excited states, multi-chromophore and single-molecule spectroscopies, and excited state dynamics in chemical and biological systems.

Mark Maroncelli, Nancy Ryan Gray

2010-06-08T23:59:59.000Z

323

Dynamic Modelling, Measurement and  

E-Print Network [OSTI]

Dynamic Modelling, Measurement and Control of Co-rotating Twin-Screw Extruders Justin Rae Elsey, B;Summary Co-rotating twin-screw extruders are unique and versatile machines that are used widely that these extruders are currently being optimally utilised. The most signi cant improvement to the eld of twin-screw

Fernandez, Thomas

324

Introduction to Structure and Dynamics: Inaugural Issue  

E-Print Network [OSTI]

the premier issue of Structure and Dynamics, an electronicFor this great boon, Structure and Dynamics in particular iselectronic journals, Structure and Dynamics will be widely

White, Douglas R.; Manlove, Robert; Colby, B. N.; Garfias, Robert; Bell, Duran

2005-01-01T23:59:59.000Z

325

Tools for dynamic model development  

E-Print Network [OSTI]

For this thesis, several tools for dynamic model development were developed and analyzed. Dynamic models can be used to simulate and optimize the behavior of a great number of natural and engineered systems, from the ...

Schaber, Spencer Daniel

2014-01-01T23:59:59.000Z

326

Dynamics of acyclic interval maps  

E-Print Network [OSTI]

Vol. 6 (2009) Dynamics of acyclic interval maps [16] D.orbits and bifurcation of maps of the interval. SIAM J.Dynamics of acyclic interval maps Morris W. Hirsch He who

Hirsch, Morris W

2009-01-01T23:59:59.000Z

327

Models of Dynamical Supersymmetry Breaking  

E-Print Network [OSTI]

We review a class of models of dynamical supersymmetry breaking, and give a unified description of these models.

Lisa Randall

1997-06-23T23:59:59.000Z

328

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

329

Dynamical entanglement versus symmetry and dynamics of classical approximations  

SciTech Connect (OSTI)

It is shown that dynamical entanglement between two qubits depends on the symmetry of the quantum model. On the other hand, the latter is reflected in the qualitative properties of the dynamics of a classical approximation of the quantum system. For generic separable pure initial states, the dynamical entanglement is larger if the system is less symmetric and its classical approximation is chaotic. The influence of different types of Markov environments on the established relation between the dynamical entanglement, symmetry and the classical dynamics is also studied.

Buric, Nikola [Department of Physics and Mathematics, Faculty of Pharmacy, University of Beograd, Vojvode Stepe 450, 11000 Belgrade (Serbia and Montenegro)

2006-05-15T23:59:59.000Z

330

Trade Liberalization And Poverty Dynamics  

E-Print Network [OSTI]

Trade Liberalization And Poverty Dynamics in Vietnam 2002-2006 Barbara COELLO World Bank Madior-28Mar2014 #12;1 Trade liberalization and poverty dynamics in Vietnam 2002-2006 Barbara Coello, the World liberalization and poverty dynamics in Vietnam 2002-2006 Abstract This paper shows the evolution of poverty

Paris-Sud XI, Universit de

331

FLUCTUATIONS AND SIMPLE CHAOTIC DYNAMICS  

E-Print Network [OSTI]

FLUCTUATIONS AND SIMPLE CHAOTIC DYNAMICS J.P. CRUTCHFIELD and J.D. FARMER Physics Board of Studies FLUCTUATIONS AND SIMPLE CHAOTIC DYNAMICS J.P. CRUTCHFIELD and J.D. FARMER* Physics Board of Studies, Universiiy anharmonic oscillator 76 2. Dynamics in the absence of fluctuations 48 Appendix B. Characteristic exponents

332

Mesoscale Dynamics Spring Semester 2014  

E-Print Network [OSTI]

ATS 735 Mesoscale Dynamics (3 cr) Spring Semester 2014 Instructor: Richard H. Johnson, Room ATS 305, certain topics in mesoscale dynamics may be emphasized more than others. Although basic concepts lectures on some of the topics. Several books that are relevant to the course are: Cloud Dynamics, 1993 (R

333

Dynamic Adaptation using Xen  

SciTech Connect (OSTI)

The topic of virtualization has received renewed attention. Xen is a popular open source type-I hypervisor. The Xen hypervisor currently has limited capabilities for runtime modification to the core hypervisor, which impairs research into dynamic adaptation for system-level virtualization. This paper discusses recent investigations into the feasibility of extending Xen to support runtime adaptation for core hypervisor service, e.g., scheduler.

Naughton, III, Thomas J [ORNL; Vallee, Geoffroy R [ORNL; Scott, Stephen L [ORNL

2007-01-01T23:59:59.000Z

334

Dynamics of multinational rivalry  

E-Print Network [OSTI]

?as the key to carry out global research is identified as a critical moderator of pair wise competitive tensions between MNEs. The competitive dynamics between Toyota and Honda could be quite different from those between Toyota and Volvo. The cultural... similarity may help Toyota and Honda clearly interpret each other?s competitive signals and therefore undertake fast competitive movements. CONTRIBUTION Overall, this dissertation contributes to the literature in the following three ways. First...

Yu, Tieying

2004-11-15T23:59:59.000Z

335

Beam Dynamics for ARIA  

E-Print Network [OSTI]

Beam dynamics issues are assessed for a new linear induction electron accelerator being designed for flash radiography of large explosively driven hydrodynamic experiments. Special attention is paid to equilibrium beam transport, possible emittance growth, and beam stability. It is concluded that a radiographic quality beam will be produced possible if engineering standards and construction details are equivalent to those on the present radiography accelerators at Los Alamos.

Ekdahl, Carl

2015-01-01T23:59:59.000Z

336

Modal aerosol dynamics modeling  

SciTech Connect (OSTI)

The report presents the governing equations for representing aerosol dynamics, based on several different representations of the aerosol size distribution. Analytical and numerical solution techniques for these governing equations are also reviewed. Described in detail is a computationally efficient numerical technique for simulating aerosol behavior in systems undergoing simultaneous heat transfer, fluid flow, and mass transfer in and between the gas and condensed phases. The technique belongs to a general class of models known as modal aerosol dynamics (MAD) models. These models solve for the temporal and spatial evolution of the particle size distribution function. Computational efficiency is achieved by representing the complete aerosol population as a sum of additive overlapping populations (modes), and solving for the time rate of change of integral moments of each mode. Applications of MAD models for simulating aerosol dynamics in continuous stirred tank aerosol reactors and flow aerosol reactors are provided. For the application to flow aerosol reactors, the discussion is developed in terms of considerations for merging a MAD model with the SIMPLER routine described by Patankar (1980). Considerations for incorporating a MAD model into the U.S. Environmental Protection Agency's Regional Particulate Model are also described. Numerical and analytical techniques for evaluating the size-space integrals of the modal dynamics equations (MDEs) are described. For multimodal logonormal distributions, an analytical expression for the coagulation integrals of the MDEs, applicable for all size regimes, is derived, and is within 20% of accurate numerical evaluation of the same moment coagulation integrals. A computationally efficient integration technique, based on Gauss-Hermite numerical integration, is also derived.

Whitby, E.R.; McMurry, P.H.; Shankar, U.; Binkowski, F.S.

1991-02-01T23:59:59.000Z

337

Dynamic radioactive particle source  

DOE Patents [OSTI]

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

338

Symmetries in open quantum dynamics  

E-Print Network [OSTI]

Simple examples are used to introduce and examine a Heisenberg picture of symmetries of open quantum dynamics that can be described by unitary operators. When the symmetries are for Hamiltonian dynamics of an entire system, and the spectrum of the Hamiltonian operator has a lower bound, the symmetry operators commute with the Hamiltonian operator. An example shows that symmetry operators need not commute with the Hamiltonian operator when the spectrum of the Hamiltonian does not have a lower bound. There are many more symmetries that are only for the open dynamics of a subsystem and are described by unitary operators that do not commute with the Hamiltonian for the dynamics of the entire system. Examples show how these symmetries alone can reveal properties of the dynamics and reduce what needs to be done to work out the dynamics. A symmetry of the open dynamics of a subsystem can imply properties of the dynamics for the entire system that are not implied by the symmetries of the dynamics of the entire system. The symmetries are generally not related to constants of the motion for the open dynamics of the subsystem. There are symmetries of the open dynamics of a subsystem that depend only on the dynamics. In the simplest examples, these are also symmetries of the dynamics of the entire system. There are many more symmetries, of a new kind, that also depend on correlations, or absence of correlations, between the subsystem and the rest of the entire system, or on the state of the rest of the entire system. Symmetries that depend on correlations generally cannot be seen in the Schr\\"{o}dinger picture as symmetries of dynamical maps of density matrices for the subsystem.

Thomas F. Jordan

2014-08-20T23:59:59.000Z

339

SDI: Statistical dynamic interactions  

SciTech Connect (OSTI)

We focus on the combined statistical and dynamical aspects of heavy ion induced reactions. The overall picture is illustrated by considering the reaction {sup 36}Ar + {sup 238}U at a projectile energy of 35 MeV/nucleon. We illustrate the time dependent bound excitation energy due to the fusion/relaxation dynamics as calculated with the Boltzmann master equation. An estimate of the mass, charge and excitation of an equilibrated nucleus surviving the fast (dynamic) fusion-relaxation process is used as input into an evaporation calculation which includes 20 heavy fragment exit channels. The distribution of excitations between residue and clusters is explicitly calculated, as is the further deexcitation of clusters to bound nuclei. These results are compared with the exclusive cluster multiplicity measurements of Kim et al., and are found to give excellent agreement. We consider also an equilibrated residue system at 25% lower initial excitation, which gives an unsatisfactory exclusive multiplicity distribution. This illustrates that exclusive fragment multiplicity may provide a thermometer for system excitation. This analysis of data involves successive binary decay with no compressional effects nor phase transitions. Several examples of primary versus final (stable) cluster decay probabilities for an A = 100 nucleus at excitations of 100 to 800 MeV are presented. From these results a large change in multifragmentation patterns may be understood as a simple phase space consequence, invoking neither phase transitions, nor equation of state information. These results are used to illustrate physical quantities which are ambiguous to deduce from experimental fragment measurements. 14 refs., 4 figs.

Blann, M.; Mustafa, M.G. (Lawrence Livermore National Lab., CA (USA)); Peilert, G.; Stoecker, H.; Greiner, W. (Frankfurt Univ. (Germany, F.R.). Inst. fuer Theoretische Physik)

1991-04-01T23:59:59.000Z

340

Dirt Dynamics | EMSL  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed Newcatalyst phasesDataTranslocation ofthe APS UserIRSFYClearinghouseDirt Dynamics

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

Dynamics of Charged Events  

SciTech Connect (OSTI)

In three spacetime dimensions the world volume of a magnetic source is a single point, an event. We make the event dynamical by regarding it as the imprint of a flux-carrying particle impinging from an extra dimension. This can be generalized to higher spacetime dimensions and to extended events. We exhibit universal observable consequences of the existence of events and argue that events are as important as particles or branes. We explain how events arise on the world volume of membranes in M theory, and in a Josephson junction in superconductivity.

Bachas, Constantin [Laboratoire de Physique Theorique de l'Ecole Normale Superieure, 24 rue Lhomond, 75231 Paris cedex (France); Bunster, Claudio [Centro de Estudios Cientificos (CECS), Avenida Arturo Prat 514, Valdivia (Chile); Henneaux, Marc [Physique Theorique et Mathematique, Universite Libre de Bruxelles and International Solvay Institutes, ULB Campus Plaine C.P. 231, 1050 Bruxelles (Belgium); Centro de Estudios Cientificos (CECS), Avenida Arturo Prat 514, Valdivia (Chile)

2009-08-28T23:59:59.000Z

342

Dynamic Windows Program  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat Pump Models |Conduct, Parent(CRADA andDriving InnovationDurable, Low1Dynamic

343

Los Alamos Dynamics Summer School  

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

School The Sixteenth Los Alamos Dynamics Summer School Program Information and Application Process Contact Institute Director Charles Farrar (505) 663-5330 Email Professional Staff...

344

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

345

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

346

Three-nucleon interactions: dynamics  

E-Print Network [OSTI]

A discussion is presented of the dynamics underlying three-body nuclear forces, with emphasis on changes which occurred over several decades.

M. R. Robilotta

2008-03-04T23:59:59.000Z

347

This manuscript downloaded from www.microgrids.et.aau.dk is the preprint of the final paper: L. Meng, F. Tang, M. Savaghebi, J. C. Vasquez, and J. M. Guerrero, "Tertiary control of voltage unbalance compensation for optimal power quality in  

E-Print Network [OSTI]

distributed generators (DGs) equally share the compensation efforts. Tertiary control, which inherently in a multi-bus islanded system by optimally utilizing DGs as distributed compensators and saves. DG Distributed generation. E0 Rated voltage amplitude. E* Reference of voltage amplitude. fc Cut

Vasquez, Juan Carlos

348

Dynamical Transition and Heterogeneous Hydration Dynamics in RNA  

E-Print Network [OSTI]

Enhanced dynamical fluctuations of RNAs, facilitated by a network of water molecules with strong interactions with RNA, are suspected to be critical in their ability to respond to a variety of cellular signals. Using atomically detailed molecular dynamics simulations at various temperatures of purine (adenine)- and preQ$_1$ sensing riboswitch aptamers, we show that water molecules in the vicinity of RNAs undergo complex dynamics depending on the local structures of the RNAs. The overall lifetimes of hydrogen bonds (HBs) of surface bound waters are more than at least 1-2 orders of magnitude longer than bulk water. Slow hydration dynamics, revealed in non-Arrhenius behavior of the relaxation time, arises from high activation barriers to break water hydrogen bonds with a nucleotide and by reduced diffusion of water. The relaxation kinetics at specific locations in the two RNAs show a broad spectrum of time scales reminiscent of glass-like behavior, suggesting that the hydration dynamics is highly heterogeneous. Both RNAs undergo dynamic transition at $T = T_D \\gtrsim 200$ K as assessed by the mean square fluctuation of hydrogen atoms $\\langle x^2\\rangle$, which undergoes an abrupt harmonic-to-anharmonic transition at $T_D$. The near universal value of $T_D$ found for these RNAs and previously for tRNA is strongly correlated with changes in hydration dynamics as $T$ is altered. Hierarchical dynamics of waters associated with the RNA surface, revealed in the motions of distinct classes of water with well-separated time scales, reflects the heterogeneous local environment on the molecular surface of RNA. At low temperatures slow water dynamics predominates over structural transitions. Our study demonstrates that the complex interplay of dynamics between water and local environment in the RNA structures could be a key determinant of the functional activities of RNA.

Jeseong Yoon; Jong-Chin Lin; Changbong Hyeon; D. Thirumalai

2014-04-24T23:59:59.000Z

349

mm-Wave Op-Amps employing simple-Miller compensation, with OIP3/PDC ratios of 211 (10 dB NF) and 144 (6.0 dB NF) at 2 GHz  

E-Print Network [OSTI]

mm-Wave Op-Amps employing simple-Miller compensation, with OIP3/PDC ratios of 211 (10 dB NF/PDC ratio at fs = 2-3 GHz, compared to state-of-the-art. We address considerations important 1000 mW power dissipation PDC . This very high ratio of output-referred third-order-intercept power

Rodwell, Mark J. W.

350

Environment-induced dynamical chaos  

E-Print Network [OSTI]

We examine the interplay of nonlinearity of a dynamical system and thermal fluctuation of its environment in the ``physical limit'' of small damping and slow diffusion in a semiclassical context and show that the trajectories of c-number variables exhibit dynamical chaos due to the thermal fluctuations of the bath.

Bidhan Chandra Bag; Deb Shankar Ray

2000-05-18T23:59:59.000Z

351

Risk Price Dynamics Jaroslav Borovicka  

E-Print Network [OSTI]

Risk Price Dynamics Jaroslav Borovicka University of Chicago Lars Peter Hansen University November 11, 2009 Abstract We present a novel approach to depicting asset pricing dynamics by characterizing shock exposures and prices for alternative investment horizons. We quantify the shock exposures

Hansen, Lars Peter

352

Perturbation Theory for Population Dynamics  

E-Print Network [OSTI]

We prove that a recently proposed homotopy perturbation method for the treatment of population dynamics is just the Taylor expansion of the population variables about initial time. Our results show that this perturbation method fails to provide the global features of the ecosystem dynamics.

Francisco M. Fernandez

2007-12-20T23:59:59.000Z

353

Effective equations for quantum dynamics  

E-Print Network [OSTI]

We report on recent results concerning the derivation of effective evolution equations starting from many body quantum dynamics. In particular, we obtain rigorous derivations of nonlinear Hartree equations in the bosonic mean field limit, with precise bounds on the rate of convergence. Moreover, we present a central limit theorem for the fluctuations around the Hartree dynamics.

Benjamin Schlein

2012-08-01T23:59:59.000Z

354

Status of dynamical ensemble generation  

E-Print Network [OSTI]

I give an overview of current and future plans of dynamical QCD ensemble generation activities. A comparison of simulation cost between different discretizations is made. Recent developments in techniques and algorithms used in QCD dynamical simulations, especially mass reweighting, are also discussed.

Chulwoo Jung

2010-01-06T23:59:59.000Z

355

Extremes in Chaotic Dynamical Systems  

E-Print Network [OSTI]

Extremes in Chaotic Dynamical Systems Valerio Lucarini valerio.lucarini@uni-hamburg.de D. Faranda Vortragsthema Datum #12;1. Introduction 2. Classical Theory: Extreme Values for i.i.d. Variables 3. Extreme Values in Dynamical Systems: Theoretical Background 4. Numerical Algorithms for studying Extremes 5

356

Reptational dynamics in dissipative particle dynamics simulations of polymer melts  

E-Print Network [OSTI]

Understanding the complex viscoelastic properties of polymeric liquids remains a challenge in materials science and soft matter physics. Here, we present a simple and computationally efficient criterion for the topological constraints in polymeric liquids using the Dissipative Particle Dynamics (DPD). The same approach is also applicable in other soft potential models. For short chains the model correctly reproduces Rouse-like dynamics whereas for longer chains the dynamics becomes reptational as the chain length is increased - something that is not attainable using standard DPD or other coarse-grained soft potential methods. Importantly, no new length scales or forces need to be added.

P. Nikunen; I. Vattulainen; M. Karttunen

2005-12-12T23:59:59.000Z

357

Accelerating atomistic simulations of defect dynamics: Hyperdynamics, parallel replica dynamics, and temperature-accelerated dynamics  

SciTech Connect (OSTI)

Obtaining a good atomistic description of diffusion dynamics in materials remains a daunting task due to the time-scale limitations of the molecular dynamics method. The authors discuss new methods, derived from transition state theory, for accelerating molecular dynamics simulations of these infrequent-event processes. Two of these methods (hyperdynamics and parallel replica dynamics) have been presented previously, and are briefly reviewed here. The third, temperature-accelerated dynamics (TAD), is presented in detail. In TAD, the system temperature is raised to stimulate more rapid escape out of each potential basin, but attempted transitions are filtered to allow only those that would have occurred at the normal temperature. The characteristics of the methods are compared.

Voter, A.F.; Soerensen, M.R.

1999-07-01T23:59:59.000Z

358

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

359

Los Alamos Dynamics Summer School Projects  

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

School-Overview Los Alamos Dynamics Summer School Projects Los Alamos Dynamics Summer School Projects and Resources Contact Institute Director Charles Farrar (505) 663-5330 Email...

360

Dynamic stall on wind turbine blades  

SciTech Connect (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

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

Hamilton Dynamics on Clifford Kaehler Manifolds  

E-Print Network [OSTI]

This paper presents Hamilton dynamics on Clifford Kaeler manifolds. In the end, the some results related to Clifford Kaehler dynamical systems are also discussed.

Mehmet Tekkoyun

2009-02-24T23:59:59.000Z

362

Protein Dynamics Hit the Big Screen  

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

Protein Dynamics Hit the Big Screen Protein Dynamics Hit the Big Screen Now playing at a supercomputer near you: proteins in action June 29, 2005 Contact: Dan Krotz,...

363

Seasonality and dynamics of whooping cough.  

E-Print Network [OSTI]

??Whooping cough (pertussis) dynamics provide an interesting disease ecology case study. Unlike other childhood diseases, the observed patterns of pertussis dynamics are found very diverse (more)

Nguyen, Hanh Thi Hong

2007-01-01T23:59:59.000Z

364

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

365

Dynamics of dark energy  

E-Print Network [OSTI]

In this paper we review in detail a number of approaches that have been adopted to try and explain the remarkable observation of our accelerating Universe. In particular we discuss the arguments for and recent progress made towards understanding the nature of dark energy. We review the observational evidence for the current accelerated expansion of the universe and present a number of dark energy models in addition to the conventional cosmological constant, paying particular attention to scalar field models such as quintessence, K-essence, tachyon, phantom and dilatonic models. The importance of cosmological scaling solutions is emphasized when studying the dynamical system of scalar fields including coupled dark energy. We study the evolution of cosmological perturbations allowing us to confront them with the observation of the Cosmic Microwave Background and Large Scale Structure and demonstrate how it is possible in principle to reconstruct the equation of state of dark energy by also using Supernovae Ia observational data. We also discuss in detail the nature of tracking solutions in cosmology, particle physics and braneworld models of dark energy, the nature of possible future singularities, the effect of higher order curvature terms to avoid a Big Rip singularity, and approaches to modifying gravity which leads to a late-time accelerated expansion without recourse to a new form of dark energy.

Edmund J. Copeland; M. Sami; Shinji Tsujikawa

2006-06-16T23:59:59.000Z

366

On quantum potential dynamics  

E-Print Network [OSTI]

Non-relativistic de Broglie-Bohm theory describes particles moving under the guidance of the wave function. In de Broglie's original formulation, the particle dynamics is given by a first-order differential equation. In Bohm's reformulation, it is given by Newton's law of motion with an extra potential that depends on the wave function--the quantum potential--together with a constraint on the possible velocities. It was recently argued, mainly by numerical simulations, that relaxing this velocity constraint leads to a physically untenable theory. We provide further evidence for this by showing that for various wave functions the particles tend to escape the wave packet. In particular, we show that for a central classical potential and bound energy eigenstates the particle motion is often unbounded. This work seems particularly relevant for ways of simulating wave function evolution based on Bohm's formulation of the de Broglie-Bohm theory. Namely, the simulations may become unstable due to deviations from the velocity constraint.

Sheldon Goldstein; Ward Struyve

2014-11-05T23:59:59.000Z

367

Computational fluid dynamic applications  

SciTech Connect (OSTI)

The rapid advancement of computational capability including speed and memory size has prompted the wide use of computational fluid dynamics (CFD) codes to simulate complex flow systems. CFD simulations are used to study the operating problems encountered in system, to evaluate the impacts of operation/design parameters on the performance of a system, and to investigate novel design concepts. CFD codes are generally developed based on the conservation laws of mass, momentum, and energy that govern the characteristics of a flow. The governing equations are simplified and discretized for a selected computational grid system. Numerical methods are selected to simplify and calculate approximate flow properties. For turbulent, reacting, and multiphase flow systems the complex processes relating to these aspects of the flow, i.e., turbulent diffusion, combustion kinetics, interfacial drag and heat and mass transfer, etc., are described in mathematical models, based on a combination of fundamental physics and empirical data, that are incorporated into the code. CFD simulation has been applied to a large variety of practical and industrial scale flow systems.

Chang, S.-L.; Lottes, S. A.; Zhou, C. Q.

2000-04-03T23:59:59.000Z

368

ICFA Beam Dynamics Newsletter  

SciTech Connect (OSTI)

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

369

Dynamics of neural cryptography  

SciTech Connect (OSTI)

Synchronization of neural networks has been used for public channel protocols in cryptography. In the case of tree parity machines the dynamics of both bidirectional synchronization and unidirectional learning is driven by attractive and repulsive stochastic forces. Thus it can be described well by a random walk model for the overlap between participating neural networks. For that purpose transition probabilities and scaling laws for the step sizes are derived analytically. Both these calculations as well as numerical simulations show that bidirectional interaction leads to full synchronization on average. In contrast, successful learning is only possible by means of fluctuations. Consequently, synchronization is much faster than learning, which is essential for the security of the neural key-exchange protocol. However, this qualitative difference between bidirectional and unidirectional interaction vanishes if tree parity machines with more than three hidden units are used, so that those neural networks are not suitable for neural cryptography. In addition, the effective number of keys which can be generated by the neural key-exchange protocol is calculated using the entropy of the weight distribution. As this quantity increases exponentially with the system size, brute-force attacks on neural cryptography can easily be made unfeasible.

Ruttor, Andreas; Kinzel, Wolfgang; Kanter, Ido [Institut fuer Theoretische Physik, Universitaet Wuerzburg, Am Hubland, 97074 Wuerzburg (Germany); Minerva Center and Department of Physics, Bar Ilan University, Ramat Gan 52900 (Israel)

2007-05-15T23:59:59.000Z

370

Dynamical Properties of Interaction Data  

E-Print Network [OSTI]

Network dynamics are typically presented as a time series of network properties captured at each period. The current approach examines the dynamical properties of transmission via novel measures on an integrated, temporally extended network representation of interaction data across time. Because it encodes time and interactions as network connections, static network measures can be applied to this "temporal web" to reveal features of the dynamics themselves. Here we provide the technical details and apply it to agent-based implementations of the well-known SEIR and SEIS epidemiological models.

Bramson, Aaron

2015-01-01T23:59:59.000Z

371

A Dynamical Approach to Temperature  

E-Print Network [OSTI]

We present a new dynamical approach for measuring the temperature of a Hamiltonian dynamical system in the micro canonical ensemble of thermodynamics. We show that under the hypothesis of ergodicity the temperature can be computed as a time-average of the functional, div(grad H/|grad H|^2), on the energy-surface. Our method not only yields an efficient computational approach for determining the temperature it also provides an intrinsic link between dynamical systems theory and the statistical mechanics of Hamiltonian systems.

Hans Henrik Rugh

1997-01-30T23:59:59.000Z

372

Dynamics of generalized tachyon field  

E-Print Network [OSTI]

We investigate the dynamics of generalized tachyon field in FRW spacetime. We obtain the autonomous dynamical system for the general case. Because the general autonomous dynamical system cannot be solved analytically, we discuss two cases in detail: $\\beta=1$ and $\\beta=2$. We find the critical points and study their stability. At these critical points, we also consider the stability of the generalized tachyon field, which is as important as the stability of critical points. The possible final states of the universe are discussed.

Rong-Jia Yang; Jingzhao Qi

2012-08-06T23:59:59.000Z

373

Chromospheric Dynamics and Line Formation  

E-Print Network [OSTI]

The solar chromosphere is very dynamic, due to the presence of large amplitude hydrodynamic waves. Their propagation is affected by NLTE radiative transport in strong spectral lines, which can in turn be used to diagnose the dynamics of the chromosphere. We give a basic introduction into the equations of NLTE radiation hydrodynamics and describe how they are solved in current numerical simulations. The comparison with observation shows that one-dimensional codes can describe strong brightenings quite well, but the overall chromospheric dynamics appears to be governed by three-dimensional shock propagation.

R. Hammer; P. Ulmschneider

2007-07-14T23:59:59.000Z

374

Connecting curves for dynamical systems  

E-Print Network [OSTI]

We introduce one dimensional sets to help describe and constrain the integral curves of an $n$ dimensional dynamical system. These curves provide more information about the system than the zero-dimensional sets (fixed points) do. In fact, these curves pass through the fixed points. Connecting curves are introduced using two different but equivalent definitions, one from dynamical systems theory, the other from differential geometry. We describe how to compute these curves and illustrate their properties by showing the connecting curves for a number of dynamical systems.

R. Gilmore; Jean-Marc Ginoux; Timothy Jones; C. Letellier; U. S. Freitas

2010-03-08T23:59:59.000Z

375

The power of dynamic pricing  

SciTech Connect (OSTI)

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

376

Queuing models System dynamics models  

E-Print Network [OSTI]

models Value chain models Business Model / Organizational Perspective Process Perspective Information#12;#12;#12;#12;Queuing models System dynamics models #12;#12;#12;#12;Blueprint or touchpoint

Glushko, Robert J.

377

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

378

Dynamic Unawareness and Rationalizable Behavior  

E-Print Network [OSTI]

Dynamic Unawareness and Rationalizable Behavior Aviad Heifetz Martin Meier Burkhard C. Schipper 2007, LOFT 2008, Games 2008 and NSF/NBER/CEME 2009, and UECE Lisbon 2010. Aviad is grateful

Niebur, Ernst

379

Gas-phase chemical dynamics  

SciTech Connect (OSTI)

Research in this program is directed towards the spectroscopy of small free radicals and reactive molecules and the state-to-state dynamics of gas phase collision, energy transfer, and photodissociation phenomena. Work on several systems is summarized here.

Weston, R.E. Jr.; Sears, T.J.; Preses, J.M. [Brookhaven National Laboratory, Upton, NY (United States)

1993-12-01T23:59:59.000Z

380

Scalability of dynamic traffic assignment  

E-Print Network [OSTI]

This research develops a systematic approach to analyze the computational performance of Dynamic Traffic Assignment (DTA) models and provides solution techniques to improve their scalability for on-line applications for ...

Wen, Yang, Ph. D. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

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.


381

Dynamic systems and subadditive functionals  

E-Print Network [OSTI]

Consider a problem where a number of dynamic systems are required to travel between points in minimum time. The study of this problem is traditionally divided into two parts: A combinatorial part that assigns points to ...

Itani, Sleiman M

2009-01-01T23:59:59.000Z

382

Cluster Dynamics of Planetary Waves  

E-Print Network [OSTI]

The dynamics of nonlinear atmospheric planetary waves is determined by a small number of independent wave clusters consisting of a few connected resonant triads. We classified the different types of connections between neighboring triads that determine the general dynamics of a cluster. Each connection type corresponds to substantially different scenarios of energy flux among the modes. The general approach can be applied directly to various mesoscopic systems with 3-mode interactions, encountered in hydrodynamics, astronomy, plasma physics, chemistry, medicine, etc.

Elena Kartashova; Victor S. L'vov

2008-11-05T23:59:59.000Z

383

Dynamic Tides in Close Binaries  

E-Print Network [OSTI]

The basic theory of dynamic tides in close binaries is reviewed. Particular attention is paid to resonances between dynamic tides and free oscillation modes and to the role of the apsidal-motion rate in probing the internal structure of binary components. The discussed effects are generally applicable to stars across the entire Hertzsprung-Russell diagram, including the binary OB-stars discussed at this meeting.

B. Willems

2005-11-10T23:59:59.000Z

384

Nonstatistical dynamics on the caldera  

E-Print Network [OSTI]

We explore both classical and quantum dynamics of a model potential exhibiting a caldera: that is, a shallow potential well with two pairs of symmetry related index one saddles associated with entrance/exit channels. Classical trajectory simulations at several different energies confirm the existence of the `dynamical matching' phenomenon originally proposed by Carpenter, where the momentum direction associated with an incoming trajectory initiated at a high energy saddle point determines to a considerable extent the outcome of the reaction (passage through the diametrically opposing exit channel). By studying a `stretched' version of the caldera model, we have uncovered a generalized dynamical matching: bundles of trajectories can reflect off a hard potential wall so as to end up exiting predominantly through the transition state opposite the reflection point. We also investigate the effects of dissipation on the classical dynamics. In addition to classical trajectory studies, we examine the dynamics of quantum wave packets on the caldera potential (stretched and unstretched). These computations reveal a quantum mechanical analogue of the `dynamical matching' phenomenon, where the initial expectation value of the momentum direction for the wave packet determines the exit channel through which most of the probability density passes to product.

Peter Collins; Zeb C. Kramer; Barry K. Carpenter; Gregory S. Ezra; Stephen Wiggins

2014-05-09T23:59:59.000Z

385

Ultrasound guided fluorescence molecular tomography with improved quantification by an attenuation compensated born-normalization and in vivo preclinical study of cancer  

SciTech Connect (OSTI)

Ultrasound imaging, having the advantages of low-cost and non-invasiveness over MRI and X-ray CT, was reported by several studies as an adequate complement to fluorescence molecular tomography with the perspective of improving localization and quantification of fluorescent molecular targets in vivo. Based on the previous work, an improved dual-modality Fluorescence-Ultrasound imaging system was developed and then validated in imaging study with preclinical tumor model. Ultrasound imaging and a profilometer were used to obtain the anatomical prior information and 3D surface, separately, to precisely extract the tissue boundary on both sides of sample in order to achieve improved fluorescence reconstruction. Furthermore, a pattern-based fluorescence reconstruction on the detection side was incorporated to enable dimensional reduction of the dataset while keeping the useful information for reconstruction. Due to its putative role in the current imaging geometry and the chosen reconstruction technique, we developed an attenuation compensated Born-normalization method to reduce the attenuation effects and cancel off experimental factors when collecting quantitative fluorescence datasets over large area. Results of both simulation and phantom study demonstrated that fluorescent targets could be recovered accurately and quantitatively using this reconstruction mechanism. Finally, in vivo experiment confirms that the imaging system associated with the proposed image reconstruction approach was able to extract both functional and anatomical information, thereby improving quantification and localization of molecular targets.

Li, Baoqiang; Berti, Romain; Abran, Maxime; Lesage, Frdric, E-mail: frederic.lesage@polymtl.ca [Institute of Biomedical Engineering, cole Polytechnique de Montral, Montreal, Quebec H3C 3A7 (Canada) [Institute of Biomedical Engineering, cole Polytechnique de Montral, Montreal, Quebec H3C 3A7 (Canada); Montreal Heart Institute, Montreal, Quebec H1T 1C8 (Canada)

2014-05-15T23:59:59.000Z

386

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

SciTech Connect (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

387

Comprehensive Environmental Response, Compensation, and Liability Act, as amended by the Superfund Amendments and Reauthorization Act Section 120(e)(5). Annual report to Congress for Fiscal year 1992  

SciTech Connect (OSTI)

The US Department of Energy (DOE) is committed to conducting its operations in a safe and environmentally sound manner. High priorities for the Department are identifying and correcting environmental problems at DOE facilities that resulted from past operations, and preventing environmental problems from occurring during present and future operations. In this regard, the Department is committed to clean up the 1989 inventory of sites in the Environmental Restoration Program by the year 2019. DOE has issued an Order and guidance establishing policy and procedures for activities conducted under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), as amended by the Superfund Amendments and Reauthorization Act (SARA), and has developed a Five-Year Plan, updated annually, that integrates planning for corrective activities, environmental restoration and waste management operations at its facilities. DOE also continues to conduct assessments (e.g., Management Audits, Environmental Safety and Health (ES & H) Progress Assessments, Internal Self Assessments) at its operating facilities to provide the Secretary of Energy with information on current environmental compliance status and follow-up on findings.

Not Available

1993-08-01T23:59:59.000Z

388

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

SciTech Connect (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) 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

389

Nonlinear Dynamics of Longitudinal Ground Vehicle Traction  

E-Print Network [OSTI]

asphalt b) Wet asphalt c) Gravel d) Packed Snow Nonlinear Dynamics of Longitudinal Ground Vehicle Traction

Shaw, Steven W.

390

Event-driven multithreaded dynamic optimization  

E-Print Network [OSTI]

Speci?c Optimizations . . . . . . . . . . . . . F.3. Trace Optimization Overhead . . . . . . . . . . . . . . .Dynamic Optimization . . . . . . .B. Optimizations with the

Zhang, Weifeng

2006-01-01T23:59:59.000Z

391

Simple Dynamic Gasifier Model That Runs in Aspen Dynamics  

SciTech Connect (OSTI)

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

392

Modeling Molecular Dynamics from Simulations  

SciTech Connect (OSTI)

Many important processes in biology occur at the molecular scale. A detailed understanding of these processes can lead to significant advances in the medical and life sciences. For example, many diseases are caused by protein aggregation or misfolding. One approach to studying these systems is to use physically-based computational simulations to model the interactions and movement of the molecules. While molecular simulations are computationally expensive, it is now possible to simulate many independent molecular dynamics trajectories in a parallel fashion by using super- or distributed- computing methods such as Folding@Home or Blue Gene. The analysis of these large, high-dimensional data sets presents new computational challenges. In this seminar, I will discuss a novel approach to analyzing large ensembles of molecular dynamics trajectories to generate a compact model of the dynamics. This model groups conformations into discrete states and describes the dynamics as Markovian, or history-independent, transitions between the states. I will discuss why the Markovian state model (MSM) is suitable for macromolecular dynamics, and how it can be used to answer many interesting and relevant questions about the molecular system. I will also discuss many of the computational and statistical challenges in building such a model, such as how to appropriately cluster conformations, determine the statistical reliability, and efficiently design new simulations.

Hinrichs, Nina Singhal (University of Chicago) [University of Chicago

2009-01-28T23:59:59.000Z

393

The Dynamics of Quintessence, The Quintessence of Dynamics  

E-Print Network [OSTI]

Quintessence theories for cosmic acceleration imbue dark energy with a non-trivial dynamics that offers hope in distinguishing the physical origin of the component. We review quintessence models with an emphasis on this dynamics and discuss classifications of the different physical behaviors. The pros and cons of various parameterizations are examined as well as the extension from scalar fields to other modifications of the Friedmann expansion equation. New results on the ability of cosmological data to distinguish among and between thawing and freezing fields are presented.

Eric V. Linder

2007-06-13T23:59:59.000Z

394

A Tariff for Reactive Power  

SciTech Connect (OSTI)

Two kinds of power are required to operate an electric power system: real power, measured in watts, and reactive power, measured in volt-amperes reactive or VARs. Reactive power supply is one of a class of power system reliability services collectively known as ancillary services, and is essential for the reliable operation of the bulk power system. Reactive power flows when current leads or lags behind voltage. Typically, the current in a distribution system lags behind voltage because of inductive loads such as motors. Reactive power flow wastes energy and capacity and causes voltage droop. To correct lagging power flow, leading reactive power (current leading voltage) is supplied to bring the current into phase with voltage. When the current is in phase with voltage, there is a reduction in system losses, an increase in system capacity, and a rise in voltage. Reactive power can be supplied from either static or dynamic VAR sources. Static sources are typically transmission and distribution equipment, such as capacitors at substations, and their cost has historically been included in the revenue requirement of the transmission operator (TO), and recovered through cost-of-service rates. By contrast, dynamic sources are typically generators capable of producing variable levels of reactive power by automatically controlling the generator to regulate voltage. Transmission system devices such as synchronous condensers can also provide dynamic reactive power. A class of solid state devices (called flexible AC transmission system devices or FACTs) can provide dynamic reactive power. One specific device has the unfortunate name of static VAR compensator (SVC), where 'static' refers to the solid state nature of the device (it does not include rotating equipment) and not to the production of static reactive power. Dynamic sources at the distribution level, while more costly would be very useful in helping to regulate local voltage. Local voltage regulation would reduce system losses, increase circuit capacity, increase reliability, and improve efficiency. Reactive power is theoretically available from any inverter-based equipment such as photovoltaic (PV) systems, fuel cells, microturbines, and adjustable-speed drives. However, the installation is usually only economical if reactive power supply is considered during the design and construction phase. In this report, we find that if the inverters of PV systems or the generators of combined heat and power (CHP) systems were designed with capability to supply dynamic reactive power, they could do this quite economically. In fact, on an annualized basis, these inverters and generators may be able to supply dynamic reactive power for about $5 or $6 per kVAR. The savings from the local supply of dynamic reactive power would be in reduced losses, increased capacity, and decreased transmission congestion. The net savings are estimated to be about $7 per kVAR on an annualized basis for a hypothetical circuit. Thus the distribution company could economically purchase a dynamic reactive power service from customers for perhaps $6/kVAR. This practice would provide for better voltage regulation in the distribution system and would provide an alternate revenue source to help amortize the cost of PV and CHP installations. As distribution and transmission systems are operated under rising levels of stress, the value of local dynamic reactive supply is expected to grow. Also, large power inverters, in the range of 500 kW to 1 MW, are expected to decrease in cost as they become mass produced. This report provides one data point which shows that the local supply of dynamic reactive power is marginally profitable at present for a hypothetical circuit. We expect that the trends of growing power flow on the existing system and mass production of inverters for distributed energy devices will make the dynamic supply of reactive power from customers an integral component of economical and reliable system operation in the future.

Kueck, John D [ORNL; Kirby, Brendan J [ORNL; Li, Fangxing [ORNL; Tufon, Christopher [Pacific Gas and Electric Company; Isemonger, Alan [California Independent System Operator

2008-07-01T23:59:59.000Z

395

Plasticity of metal wires in torsion: molecular dynamics and dislocation dynamics simulations  

E-Print Network [OSTI]

Plasticity of metal wires in torsion: molecular dynamics and dislocation dynamics simulations-4040 Abstract The orientation dependent plasticity in metal nanowires is investigated using molecular dynamics metal wires controls the mechanisms of plastic deformation. For wires oriented along 110 , dislocations

Cai, Wei

396

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

2008-04-02T23:59:59.000Z

397

Fissile solution dynamics: Student research  

SciTech Connect (OSTI)

There are two research projects in criticality safety at the University of Arizona: one in dynamic simulation of hypothetical criticality accidents in fissile solutions, and one in criticality benchmarks using transport theory. We have used the data from nuclear excursions in KEWB, CRAC, and SILENE to help in building models for solution excursions. An equation of state for liquids containing gas bubbles has been developed and coupled to point-reactor dynamics in an attempt to predict fission rate, yield, pressure, and kinetic energy. It appears that radiolytic gas is unimportant until after the first peak, but that it does strongly affect the shape of the subsequent power decrease and also the dynamic pressure.

Hetrick, D.L.

1994-09-01T23:59:59.000Z

398

Dynamics of Block Copolymer Nanocomposites  

SciTech Connect (OSTI)

A detailed study of the dynamics of cadmium sulfide nanoparticles suspended in polystyrene homopolymer matrices was carried out using X-ray photon correlation spectroscopy for temperatures between 120 and 180 C. For low molecular weight polystyrene homopolymers, the observed dynamics show a crossover from diffusive to hyper-diffusive behavior with decreasing temperatures. For higher molecular weight polystyrene, the nanoparticle dynamics appear hyper-diffusive at all temperatures studied. The relaxation time and characteristic velocity determined from the measured hyper-diffusive dynamics reveal that the activation energy and underlying forces determined are on the order of 2.14 10?19 J and 87 pN, respectively. We also carried out a detailed X-ray scattering study of the static and dynamic behavior of a styrene isoprene diblock copolymer melt with a styrene volume fraction of 0.3468. At 115 and 120 C, we observe splitting of the principal Bragg peak, which we attribute to phase coexistence of hexagonal cylindrical and cubic double- gyroid structure. In the disordered phase, above 130 C, we have characterized the dynamics of composition fluctuations via X-ray photon correlation spectroscopy. Near the peak of the static structure factor, these fluctuations show stretched-exponential relaxations, characterized by a stretching exponent of about 0.36 for a range of temperatures immediately above the MST. The corresponding characteristic relaxation times vary exponentially with temperature, changing by a factor of 2 for each 2 C change in temperature. At low wavevectors, the measured relaxations are diffusive with relaxation times that change by a factor of 2 for each 8 C change in temperature.

Mochrie, Simon G. J.

2014-09-09T23:59:59.000Z

399

Theoretical studies of combustion dynamics  

SciTech Connect (OSTI)

The basic objectives of this research program are to develop and apply theoretical techniques to fundamental dynamical processes of importance in gas-phase combustion. There are two major areas currently supported by this grant. One is reactive scattering of diatom-diatom systems, and the other is the dynamics of complex formation and decay based on L{sup 2} methods. In all of these studies, the authors focus on systems that are of interest experimentally, and for which potential energy surfaces based, at least in part, on ab initio calculations are available.

Bowman, J.M. [Emory Univ., Atlanta, GA (United States)

1993-12-01T23:59:59.000Z

400

Fairness and dynamic pricing: comments  

SciTech Connect (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

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

Statistics as a dynamical attractor  

E-Print Network [OSTI]

It is demonstrated that any statistics can be represented by an attractor of the solution to a corresponding systen of ODE coupled with its Liouville equation. Such a non-Newtonian representation allows one to reduce foundations of statistics to better established foundations of ODE. In addition to that, evolution to the attractor reveals possible micro-mechanisms driving random events to the final distribution of the corresponding statistical law. Special attention is concentrated upon the power law and its dynamical interpretation: it is demonstrated that the underlying dynamics supports a " violent reputation" of the power law statistics.

Michail Zak

2012-08-30T23:59:59.000Z

402

Comprehensive ecosystem model-experiment synthesis using multiple datasets at two temperate forest free-air CO2 enrichment experiments: model performance and compensating biases  

SciTech Connect (OSTI)

Free Air CO2 Enrichment (FACE) experiments provide a remarkable wealth of data to test the sensitivities of terrestrial ecosystem models (TEMs). In this study, a broad set of 11 TEMs were compared to 22 years of data from two contrasting FACE experiments in temperate forests of the south eastern US the evergreen Duke Forest and the deciduous Oak Ridge forest. We evaluated the models' ability to reproduce observed net primary productivity (NPP), transpiration and Leaf Area index (LAI) in ambient CO2 treatments. Encouragingly, many models simulated annual NPP and transpiration within observed uncertainty. Daily transpiration model errors were often related to errors in leaf area phenology and peak LAI. Our analysis demonstrates that the simulation of LAI often drives the simulation of transpiration and hence there is a need to adopt the most appropriate of hypothesis driven methods to simulate and predict LAI. Of the three competing hypotheses determining peak LAI (1) optimisation to maximise carbon export, (2) increasing SLA with canopy depth and (3) the pipe model the pipe model produced LAI closest to the observations. Modelled phenology was either prescribed or based on broader empirical calibrations to climate. In some cases, simulation accuracy was achieved through compensating biases in component variables. For example, NPP accuracy was sometimes achieved with counter-balancing biases in nitrogen use efficiency and nitrogen uptake. Combined analysis of parallel measurements aides the identification of offsetting biases; without which over-confidence in model abilities to predict ecosystem function may emerge, potentially leading to erroneous predictions of change under future climates.

Walker, Anthony P [ORNL] [ORNL; Hanson, Paul J [ORNL] [ORNL; DeKauwe, Martin G [Macquarie University] [Macquarie University; Medlyn, Belinda [Macquarie University] [Macquarie University; Zaehle, S [Max Planck Institute for Biogeochemistry] [Max Planck Institute for Biogeochemistry; Asao, Shinichi [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Dietze, Michael [University of Illinois, Urbana-Champaign] [University of Illinois, Urbana-Champaign; Hickler, Thomas [Goethe University, Frankfurt, Germany] [Goethe University, Frankfurt, Germany; Huntinford, Chris [Centre for Ecology and Hydrology, Wallingford, United Kingdom] [Centre for Ecology and Hydrology, Wallingford, United Kingdom; Iversen, Colleen M [ORNL] [ORNL; Jain, Atul [University of Illinois, Urbana-Champaign] [University of Illinois, Urbana-Champaign; Lomas, Mark [University of Sheffield] [University of Sheffield; Luo, Yiqi [University of Oklahoma] [University of Oklahoma; McCarthy, Heather R [Duke University] [Duke University; Parton, William [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Prentice, I. Collin [Macquarie University] [Macquarie University; Thornton, Peter E [ORNL] [ORNL; Wang, Shusen [Canada Centre for Remote Sensing (CCRS)] [Canada Centre for Remote Sensing (CCRS); Wang, Yingping [CSIRO Marine and Atmospheric Research] [CSIRO Marine and Atmospheric Research; Warlind, David [Lund University, Sweden] [Lund University, Sweden; Weng, Ensheng [University of Oklahoma, Norman] [University of Oklahoma, Norman; Warren, Jeffrey [ORNL] [ORNL; Woodward, F. Ian [University of Sheffield] [University of Sheffield; Oren, Ram [Duke University] [Duke University; Norby, Richard J [ORNL] [ORNL

2014-01-01T23:59:59.000Z

403

Fiscal Year 1994 progress in implementing Section 120 of the Comprehensive Environmental Rresponse, Compensation, and Liability Act. Eighth annual report to Congress  

SciTech Connect (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

404

Compensating Customer-Generators: A taxonomy describing methods of compensating  

E-Print Network [OSTI]

their electricity demands (loads) (IEA, 2003; Lovins, 2003). This trend can be attributed to factors, investment in grid-connected generation capacity is growing at a faster rate than off-grid applications (IEA of Canadian utilities, utility review boards, and provincial governments showed that there is no consensus

Hughes, Larry

405

Dynamical systems probabilistic risk assessment.  

SciTech Connect (OSTI)

Probabilistic Risk Assessment (PRA) is the primary tool used to risk-inform nuclear power regulatory and licensing activities. Risk-informed regulations are intended to reduce inherent conservatism in regulatory metrics (e.g., allowable operating conditions and technical specifications) which are built into the regulatory framework by quantifying both the total risk profile as well as the change in the risk profile caused by an event or action (e.g., in-service inspection procedures or power uprates). Dynamical Systems (DS) analysis has been used to understand unintended time-dependent feedbacks in both industrial and organizational settings. In dynamical systems analysis, feedback loops can be characterized and studied as a function of time to describe the changes to the reliability of plant Structures, Systems and Components (SSCs). While DS has been used in many subject areas, some even within the PRA community, it has not been applied toward creating long-time horizon, dynamic PRAs (with time scales ranging between days and decades depending upon the analysis). Understanding slowly developing dynamic effects, such as wear-out, on SSC reliabilities may be instrumental in ensuring a safely and reliably operating nuclear fleet. Improving the estimation of a plant's continuously changing risk profile will allow for more meaningful risk insights, greater stakeholder confidence in risk insights, and increased operational flexibility.

Denman, Matthew R.; Ames, Arlo Leroy

2014-03-01T23:59:59.000Z

406

Dynamical Spacetimes from Numerical Hydrodynamics  

E-Print Network [OSTI]

We numerically construct dynamical asymptotically-AdS$_4$ metrics by evaluating the fluid/gravity metric on numerical solutions of dissipative hydrodynamics in (2+1) dimensions. The resulting numerical metrics satisfy Einstein's equations in (3+1) dimensions to high accuracy.

Allan Adams; Nathan Benjamin; Arvin Moghaddam; Wojciech Musial

2014-11-07T23:59:59.000Z

407

Dynamical friction on satellite galaxies  

E-Print Network [OSTI]

For a rigid model satellite, Chandrasekhar's dynamical friction formula describes the orbital evolution quite accurately, when the Coulomb logarithm is chosen appropriately. However, it is not known if the orbital evolution of a real satellite with the internal degree of freedom can be described by the dynamical friction formula. We performed N-body simulation of the orbital evolution of a self-consistent satellite galaxy within a self-consistent parent galaxy. We found that the orbital decay of the simulated satellite is significantly faster than the estimate from the dynamical friction formula. The main cause of this discrepancy is that the stars stripped out of the satellite are still close to the satellite, and increase the drag force on the satellite through two mechanisms. One is the direct drag force from particles in the trailing tidal arm, a non-axisymmetric force that slows the satellite down. The other is the indirect effect that is caused by the particles remaining close to the satellite after escape. The force from them enhances the wake caused in the parent galaxy by dynamical friction, and this larger wake in turn slows the satellite down more than expected from the contribution of its bound mass. We found these two have comparable effects, and the combined effect can be as large as 20% of the total drag force on the satellite.

Michiko Fujii; Yoko Funato; Junichiro Makino

2005-11-22T23:59:59.000Z

408

Water Dynamics at Rough Interfaces  

E-Print Network [OSTI]

We use molecular dynamics computer simulations and nuclear magnetic resonance experiments to investigate the dynamics of water at interfaces of molecular roughness and low mobility. We find that, when approaching such interfaces, the structural relaxation of water, i.e., the $\\alpha$ process, slows down even when specific attractive interactions are absent. This prominent effect is accompanied by a smooth transition from Vogel to Arrhenius temperature dependence and by a growing importance of jump events. Consistently, at protein surfaces, deviations from Arrhenius behavior are weak when free water does not exist. Furthermore, in nanoporous silica, a dynamic crossover of liquid water occurs when a fraction of solid water forms near 225 K and, hence, the liquid dynamics changes from bulk-like to interface-dominated. At sufficiently low temperatures, water exhibits a quasi-universal $\\beta$ process, which is characterized by an activation energy of $E_a\\!=\\!0.5$ eV and involves anisotropic reorientation about large angles. As a consequence of its large amplitude, the faster $\\beta$ process destroys essentially all orientational correlation, rendering observation of a possible slower $\\alpha$ process difficult in standard experiments. Nevertheless, we find indications for the existence of structural relaxation down to a glass transition of interfacial water near 185 K. Hydrated proteins show a highly restricted backbone motion with an amplitude, which decreases upon cooling and vanishes at comparable temperatures, providing evidence for a high relevance of water rearrangements in the hydration shell for secondary protein relaxations.

Markus Rosenstihl; Kerstin Kmpf; Felix Klameth; Matthias Sattig; Michael Vogel

2014-07-21T23:59:59.000Z

409

LECTURES IN ELEMENTARY FLUID DYNAMICS  

E-Print Network [OSTI]

LECTURES IN ELEMENTARY FLUID DYNAMICS: Physics, Mathematics and Applications J. M. McDonough Departments of Mechanical Engineering and Mathematics University of Kentucky, Lexington, KY 40506-0503 c 1987, 1990, 2002, 2004, 2009 #12;Contents 1 Introduction 1 1.1 Importance of Fluids

McDonough, James M.

410

Relativistic dynamics without conservation laws  

E-Print Network [OSTI]

We show that relativistic dynamics can be approached without using conservation laws (conservation of momentum, of energy and of the centre of mass). Our approach avoids collisions that are not easy to teach without mnemonic aids. The derivations are based on the principle of relativity and on its direct consequence, the addition law of relativistic velocities.

Bernhard Rothenstein; Stefan Popescu

2006-05-23T23:59:59.000Z

411

Anholonomic frames in constrained dynamics  

E-Print Network [OSTI]

We demonstrate the usefulness of anholonomic frames in the contexts of nonholonomic and vakonomic systems. We take a consistently differential-geometric approach. As an application, we investigate the conditions under which the dynamics of the two systems will be consistent. A few illustrative examples confirm the results.

M. Crampin; T. Mestdag

2009-09-23T23:59:59.000Z

412

Complex Dynamics Effect on Distributions  

E-Print Network [OSTI]

In this study, Lagrangian and Hamiltonian systems, which are mathematical models of mechanical systems, were introduced on the horizontal and the vertical distributions of tangent and cotangent bundles. Finally, some geometrical and physical results related to Lagrangian and Hamiltonian dynamical systems were deduced.

Mehmet Tekkoyun

2009-01-09T23:59:59.000Z

413

Benzene Dimer: Dynamic Structure and Thermodynamics Derived from...  

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

Benzene Dimer: Dynamic Structure and Thermodynamics Derived from On-the-Fly ab initio DFT-D Molecular Dynamic Simulations. Benzene Dimer: Dynamic Structure and Thermodynamics...

414

Los Alamos Dynamics Summer School-Past Programs  

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

Los Alamos Dynamics Summer School Los Alamos Dynamics Summer School Projects and Resources 2015 Los Alamos Dynamics Summer School Projects and Resources Contact Institute Director...

415

DLFM library tools for large scale dynamic applications.  

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

DLFM library tools for large scale dynamic applications DLFM library tools for large scale dynamic applications Large scale Python and other dynamic applications may spend huge...

416

Structure and Dynamics Vol.1 No.2: Editorial Commentary  

E-Print Network [OSTI]

This issue of Structure and Dynamics is dedicated to thethe second issue of Structure and Dynamics with considerablein forthcoming issues of Structure and Dynamics. Color and

White, Douglas R Institute of Mathematical Behavioral Science and Department of Anthropology; Manlove, Robert F.

2005-01-01T23:59:59.000Z

417

A Preliminary Analysis of the Economics of Using Distributed Energy as a Source of Reactive Power Supply  

SciTech Connect (OSTI)

A major blackout affecting 50 million people in the Northeast United States, where insufficient reactive power supply was an issue, and an increased number of filings made to the Federal Energy Regulatory Commission by generators for reactive power has led to a closer look at reactive power supply and compensation. The Northeastern Massachusetts region is one such area where there is an insufficiency in reactive power compensation. Distributed energy due to its close proximity to loads seems to be a viable option for solving any present or future reactive power shortage problems. Industry experts believe that supplying reactive power from synchronized distributed energy sources can be 2 to 3 times more effective than providing reactive support in bulk from longer distances at the transmission or generation level. Several technology options are available to supply reactive power from distributed energy sources such as small generators, synchronous condensers, fuel cells or microturbines. In addition, simple payback analysis indicates that investments in DG to provide reactive power can be recouped in less than 5 years when capacity payments for providing reactive power are larger than $5,000/kVAR and the DG capital and installation costs are lower than $30/kVAR. However, the current institutional arrangements for reactive power compensation present a significant barrier to wider adoption of distributed energy as a source of reactive power. Furthermore, there is a significant difference between how generators and transmission owners/providers are compensated for reactive power supplied. The situation for distributed energy sources is even more difficult, as there are no arrangements to compensate independent DE owners interested in supplying reactive power to the grid other than those for very large IPPs. There are comparable functionality barriers as well, as these smaller devices do not have the control and communications requirements necessary for automatic operation in response to local or system operators. There are no known distributed energy asset owners currently receiving compensation for reactive power supply or capability. However, there are some cases where small generators on the generation and transmission side of electricity supply have been tested and have installed the capability to be dispatched for reactive power support. Several concerns need to be met for distributed energy to become widely integrated as a reactive power resource. The overall costs of retrofitting distributed energy devices to absorb or produce reactive power need to be reduced. There needs to be a mechanism in place for ISOs/RTOs to procure reactive power from the customer side of the meter where distributed energy resides. Novel compensation methods should be introduced to encourage the dispatch of dynamic resources close to areas with critical voltage issues. The next phase of this research will investigate in detail how different options of reactive power producing DE can compare both economically and functionally with shunt capacitor banks. Shunt capacitor banks, which are typically used for compensating reactive power consumption of loads on distribution systems, are very commonly used because they are very cost effective in terms of capital costs. However, capacitor banks can require extensive maintenance especially due to their exposure to lightning at the top of utility poles. Also, it can be problematic to find failed capacitor banks and their maintenance can be expensive, requiring crews and bucket trucks which often requires total replacement. Another shortcoming of capacitor banks is the fact that they usually have one size at a location (typically sized as 300, 600, 900 or 1200kVAr) and thus don't have variable range as do reactive power producing DE, and cannot respond to dynamic reactive power needs. Additional future work is to find a detailed methodology to identify the hidden benefit of DE for providing reactive power and the best way to allocate the benefit among customers, utilities, transmission companies or RTOs.

Li, Fangxing [ORNL; Kueck, John D [ORNL; Rizy, D Tom [ORNL; King, Thomas F [ORNL

2006-04-01T23:59:59.000Z

418

Perks and Culture Competitive compensation  

E-Print Network [OSTI]

· Relocation packages · Community involvement · Sustainability/green initiatives · Inclusive, teamwork a unified development environment for 3D modeling, visualization and more. · Building simulation software-of-the-line equipment examPles of InterestIng ProjeCts · Creating an open software development framework that provides

Ghosh, Joydeep

419

Compensation | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Z machine helps scientists understand the sun's heart NNSA Blog Livermore researchers create new technology for first responders NNSA Blog Annular Core Research Reactor - Critical...

420

Pressure compensated flow control valve  

DOE Patents [OSTI]

The invention is an air flow control valve which is capable of maintaining a constant flow at the outlet despite changes in the inlet or outlet pressure. The device consists of a shell assembly with an inlet chamber and outlet chamber separated by a separation plate. The chambers are connected by an orifice. Also located within the inlet chamber is a port controller assembly. The port controller assembly consists of a differential pressure plate and port cap affixed thereon. The cap is able to slide in and out of the orifice separating the inlet and outlet chambers. When the pressure differential is sufficient, the differential pressure plate rises or falls to maintain a constant air flow. Movement of the port controller assembly does not require the use of seals, diaphragms, tight tolerances, bushings, bearings, hinges, guides, or lubricants.

Minteer, Daniel J. (West Richland, WA)

1999-01-01T23:59:59.000Z

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.


421

Perks and Culture Competitive compensation  

E-Print Network [OSTI]

technologies such as 2D/3D simulation, gamification, and mobile devices that will enable timely delivery

Ghosh, Joydeep

422

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

423

Compensated amorphous silicon solar cell  

DOE Patents [OSTI]

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

424

Banker Compensation and Confirmation Bias  

E-Print Network [OSTI]

be thought of as a banker, chooses an observable action. Experts dier in their ability to make the correct decision and this ability is their private information. We model this by assuming that prior to making his decision the expert receives a noisy... that is known as belief persistence. In the second variant of the model, the expert receives his private information and chooses an action. He is then asked how likely he thinks it is that he is correct. In the long run, if his action turns out to be wrong...

Sabourian, Hamid; Sibert, A C

425

Compensation Packages Wind Energy Easements  

E-Print Network [OSTI]

to provide rural landowners with information about the wind industry, which was just beginning to emerge in the Midwest and Great Plains. In particular, we focused on land leases and wind energy easements because such agreements provided the primary means for farmers to participate in wind energy development. Since then, the U.S. wind industry has grown dramatically, with commercial-scale installations in more than 30 states and the expectation of a record year for new installations in 2005. As wind energy development has spread, the knowledge base among landowners and rural communities has grown, and options for local participation have increased substantially. With more options and information sources on wind basics available, we believed this was the right time for Windustry to revisit our work on what continues to be the principal means for landowners to participate in wind development: land leases and wind energy easements. This work addresses the ever more sophisticated questions landowners have raised about hosting wind turbines, and also begins to define good practices for developers as many new companies, large and small, enter the industry. Our primary goals are:

Lease Agreement

426

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

427

Hanford Workers Compensation - Hanford Site  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickr FlickrGuidedCH2M HILL Secretary MonizSite

428

Compensation Claim Process - Hanford Site  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to User Group and UserofProteinNewsat NERSC#N/Aa

429

Overtime Compensation | Department of Energy  

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

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

430

Archetypal energy landscapes: Dynamical diagnosis Florin Despa  

E-Print Network [OSTI]

Archetypal energy landscapes: Dynamical diagnosis Florin Despa Department of Chemistry, University studies have identified several motifs for potential energy surfaces corresponding to distinct dynamic and thermodynamic properties. The corresponding disconnectivity graphs were identified as ``palm tree,'' ``willow

Berry, R. Stephen

431

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

432

Optimization of nave 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

433

The nonlinear dynamics of the sea breeze  

E-Print Network [OSTI]

The response of the land and sea breeze circulation to two highly simplified dynamical models is presented. The first dynamical model is the explicit specification of an oscillating interior heat source analogous to that from Rotunno (1983...

Walter, Kevin Robert

2004-11-15T23:59:59.000Z

434

A Multiscale Analysis of Dynamic Wetting  

E-Print Network [OSTI]

Williams, B. C. (2008). Engineering Fluid Mechanics. Wiley,Thermo-Fluid Dynamics: In Materials Science and Engineering.Fluid Dynamics. McGraw-Hill Sci- ence/Engineering/Math, 1st

Minaki, Hiroyuki

2013-01-01T23:59:59.000Z

435

A Note on Tubular Brane Dynamics  

E-Print Network [OSTI]

We present new time dependent solutions for the dynamics of tubular D2-branes. We comment on the connection to cosmic string dynamics and explicitly give a few simple examples of oscillating and rotating brane configurations.

Jose J. Blanco-Pillado

2005-04-19T23:59:59.000Z

436

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,...

2013-02-27T23:59:59.000Z

437

Dynamic Screening and Thermonuclear Reaction Rates  

E-Print Network [OSTI]

We show that there are no dynamic screening corrections to the Salpeter's enhancement factor in the weak-screening limit.

Andrei V. Gruzinov

1997-02-06T23:59:59.000Z

438

Two-Parameter Dynamics and Geometry  

E-Print Network [OSTI]

In this paper we present the two-parameter dynamics which is implied by the law of inertia in flat spacetime. A remarkable perception is that (A)dS4 geometry may emerge from the two-parameter dynamics, which exhibits some phenomenon of dynamics/ geometry correspondence. We also discuss the Unruh effects within the context of two-parameter dynamics. In the last section we construct various invariant actions with respect to the broken symmetry groups.

Zhi Hu; Mulin Yan; Sen Hu

2015-01-10T23:59:59.000Z

439

Dynamics of Josephson-junction ladders  

SciTech Connect (OSTI)

We have numerically studied dynamical behaviors of Josephson-junction ladders consisting of [ital N][sub [ital p

Kim, J. (Department of Physics, Basic Science Research Institute, Pohang Institute of Science and Technology, Pohang P.O. Box 125, Kyungbuk 790-600 (Korea, Republic of) Division of Basic Science Research, Research Institute of Industrial Science and Technology, Pohang P.O. Box 135, Kyungbuk 790-600 (Korea, Republic of)); Choe, W.G.; Kim, S. (Department of Physics, Basic Science Research Institute, Pohang Institute of Science and Technology, Pohang P.O. Box 125, Kyungbuk 790-600 (Korea, Republic of)); Lee, H.J. (Department of Physics, Basic Science Research Institute, Pohang Institute of Science and Technology, Pohang P.O. Box 125, Kyungbuk 790-600 (Korea, Republic of) Division of Basic Science Research, Research Institute of Industrial Science and Technology, Pohang P.O. Box 135, Kyungbuk 790-600 (Korea, Republic of))

1994-01-01T23:59:59.000Z

440

Metallic phase-change materials for solar dynamic energy storage systems  

SciTech Connect (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

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

FACILITATORY NEURAL DYNAMICS FOR PREDICTIVE EXTRAPOLATION  

E-Print Network [OSTI]

FACILITATORY NEURAL DYNAMICS FOR PREDICTIVE EXTRAPOLATION A Dissertation by HEE JIN LIM Submitted DYNAMICS FOR PREDICTIVE EXTRAPOLATION A Dissertation by HEE JIN LIM Submitted to Texas A&M University: Computer Science #12;iii ABSTRACT Facilitatory Neural Dynamics for Predictive Extrapolation. (August 2006

Choe, Yoonsuck

442

Dynamics of Dirac Fermions in Topological Insulators  

E-Print Network [OSTI]

Dynamics of Dirac Fermions in Topological Insulators R. Hammer1 , C. Ertler1 , W. P¨otz1 , and A.hammer@uni-graz.at Abstract We study the coherent dynamics of Dirac fermions on the surface of topological insulators in one topological insulators (TI) we investigate theoretically the dynamics of Dirac fermion wave packets on their 2

Arnold, Anton

443

Socio-economic dynamics of biofuel  

E-Print Network [OSTI]

i Socio-economic dynamics of biofuel development in Asia Pacific Christina Schott Jakarta, 2009 #12;ii Socio-economic dynamics of biofuel development in Asia Pacific Socio-economic dynamics of biofuel of many biofuels has turned out to be far from sustainable. The carbon balance often proves to be negative

444

An Infrastructure for Adaptive Dynamic Optimization  

E-Print Network [OSTI]

An Infrastructure for Adaptive Dynamic Optimization Derek Bruening, Timothy Garnett, and Saman,timothyg,saman}@lcs.mit.edu Abstract Dynamic optimization is emerging as a promising ap- proach to overcome many of the obstacles static optimizations, there are very few for developing dynamic optimizations. We present a framework

Amarasinghe, Saman

445

Calculating Evolutionary Dynamics in Structured Populations  

E-Print Network [OSTI]

Calculating Evolutionary Dynamics in Structured Populations Charles G. Nathanson1. , Corina E. Here we provide a general formula for calculating evolutionary dynamics in a wide class of structured) Calculating Evolutionary Dynamics in Structured Populations. PLoS Comput Biol 5(12): e1000615. doi:10

Nowak, Martin A.

446

Origin and Structure of Dynamic Cooperative Networks  

E-Print Network [OSTI]

Origin and Structure of Dynamic Cooperative Networks Lucas Wardil & Christoph Hauert Department the local structure of the social network. Here we propose a simple theoretical framework to model dynamic among coop- erators24 . Social networks represent a dynamical abstraction of social structures

Hauert, Christoph

447

Routes to wild dynamics Lorenzo J. DIAZ  

E-Print Network [OSTI]

Routes to wild dynamics Lorenzo J. D´IAZ Departamento de Matem´atica Pontif´icia Universidade Cat to wild dynamics. We first discuss the C2 persistent coexistence of infinitely many sinks associated (but good) idea of L´opez de S´a, we studied a paper on wild dynamics, the so-called Newhouse

Ruiz, Jesús M.

448

Dynamics of Clouds Fall Semester 2012  

E-Print Network [OSTI]

ATS712 Dynamics of Clouds Fall Semester 2012 Meeting Times: T/Th: 9-10:15am Room: ATS 101-2pm Course Description: This class focuses on the general dynamics of cloud systems. Models of fog and other Tools / Skills Cotton, W.R., G.H. Bryan, and S.C. van den Heever, 2010: Storm and Cloud Dynamics

449

Spatiotemporal Dynamics of Insect-Fire Interactions  

E-Print Network [OSTI]

Spatiotemporal Dynamics of Insect-Fire Interactions A thesis presented by Heather Joan Lynch Heather Joan Lynch Spatiotemporal Dynamics of Insect-Fire Interactions Abstract Insect outbreaks on the dynamics and composition of forest ecosystems. Although it has long been speculated that forest fires

Moorcroft, Paul R.

450

Control algorithms for dynamic attenuators  

SciTech Connect (OSTI)

Purpose: The authors describe algorithms to control dynamic attenuators in CT and compare their performance using simulated scans. Dynamic attenuators are prepatient beam shaping filters that modulate the distribution of x-ray fluence incident on the patient on a view-by-view basis. These attenuators can reduce dose while improving key image quality metrics such as peak or mean variance. In each view, the attenuator presents several degrees of freedom which may be individually adjusted. The total number of degrees of freedom across all views is very large, making many optimization techniques impractical. The authors develop a theory for optimally controlling these attenuators. Special attention is paid to a theoretically perfect attenuator which controls the fluence for each ray individually, but the authors also investigate and compare three other, practical attenuator designs which have been previously proposed: the piecewise-linear attenuator, the translating attenuator, and the double wedge attenuator. Methods: The authors pose and solve the optimization problems of minimizing the mean and peak variance subject to a fixed dose limit. For a perfect attenuator and mean variance minimization, this problem can be solved in simple, closed form. For other attenuator designs, the problem can be decomposed into separate problems for each view to greatly reduce the computational complexity. Peak variance minimization can be approximately solved using iterated, weighted mean variance (WMV) minimization. Also, the authors develop heuristics for the perfect and piecewise-linear attenuators which do not requirea priori knowledge of the patient anatomy. The authors compare these control algorithms on different types of dynamic attenuators using simulated raw data from forward projected DICOM files of a thorax and an abdomen. Results: The translating and double wedge attenuators reduce dose by an average of 30% relative to current techniques (bowtie filter with tube current modulation) without increasing peak variance. The 15-element piecewise-linear dynamic attenuator reduces dose by an average of 42%, and the perfect attenuator reduces dose by an average of 50%. Improvements in peak variance are several times larger than improvements in mean variance. Heuristic control eliminates the need for a prescan. For the piecewise-linear attenuator, the cost of heuristic control is an increase in dose of 9%. The proposed iterated WMV minimization produces results that are within a few percent of the true solution. Conclusions: Dynamic attenuators show potential for significant dose reduction. A wide class of dynamic attenuators can be accurately controlled using the described methods.

Hsieh, Scott S., E-mail: sshsieh@stanford.edu [Department of Radiology, Stanford University, Stanford, California 94305 and Department of Electrical Engineering, Stanford University, Stanford, California 94305 (United States); Pelc, Norbert J. [Department of Radiology, Stanford University, Stanford California 94305 and Department of Bioengineering, Stanford University, Stanford, California 94305 (United States)] [Department of Radiology, Stanford University, Stanford California 94305 and Department of Bioengineering, Stanford University, Stanford, California 94305 (United States)

2014-06-15T23:59:59.000Z

451

Dynamic transition in an atomic glass former: a molecular dynamics evidence  

E-Print Network [OSTI]

We find that a Lennard-Jones mixture displays a dynamic phase transition between an active regime and an inactive one. By means of molecular dynamics simulations and of a finite-size study, we show that the space time dynamics in the supercooled regime coincides with a dynamic first order transition point.

Estelle Pitard; Vivien Lecomte; Frdric Van Wijland

2011-11-28T23:59:59.000Z

452

THE JOURNAL OF CHEMICAL PHYSICS 139, 175101 (2013) Dynamic neutron scattering from conformational dynamics. I. Theory  

E-Print Network [OSTI]

#12;THE JOURNAL OF CHEMICAL PHYSICS 139, 175101 (2013) Dynamic neutron scattering from, a conformational dynamics theory of dynamical neutron and X-ray scattering is developed, follow- ing our previous spectroscopy (dynamic neutron scattering) probes time correlations on the sub pico- to microsec- ond timescales

453

Introduction to Computational Fluid Dynamics 424512 E #1 -rz Introduction to Computational Fluid Dynamics  

E-Print Network [OSTI]

Introduction to Computational Fluid Dynamics 424512 E #1 - rz Introduction to Computational Fluid Dynamics (iCFD) 424512.0 E, 5 sp / 3 sw 1. Introduction; Fluid dynamics (lecture 1 of 5) Ron Zevenhoven ?bo to Computational Fluid Dynamics 424512 E #1 - rz april 2013 ?bo Akademi Univ - Thermal and Flow Engineering

Zevenhoven, Ron

454

Dynamical Systems and Applications of Nonlinear Functional Analysis to Dynamical Systems  

E-Print Network [OSTI]

Dynamical Systems and Applications of Nonlinear Functional Analysis to Dynamical Systems Meirong consists of three parts. In Part 1 we introduce some basic concepts in dynamical systems, including limit sets, nonwandering sets, topological conjugacy, clas- sification of discrete dynamical systems under

Zhang, Meirong

455

Predissociation dynamics of lithium iodide  

E-Print Network [OSTI]

The predissociation dynamics of lithium iodide (LiI) in the first excited A-state is investigated for molecules in the gas phase and embedded in helium nanodroplets, using femtosecond pump-probe photoionization spectroscopy. In the gas phase, the transient Li+ and LiI+ ion signals feature damped oscillations due to the excitation and decay of a vibrational wave packet. Based on high-level ab initio calculations of the electronic structure of LiI and simulations of the wave packet dynamics, the exponential signal decay is found to result from predissociation predominantly at the lowest avoided X-A potential curve crossing, for which we infer a coupling constant V=650(20) reciprocal cm. The lack of a pump-probe delay dependence for the case of LiI embedded in helium nanodroplets indicates fast droplet-induced relaxation of the vibrational excitation.

Schmidt, H; Stienkemeier, F; Bogomolov, A S; Baklanov, A V; Reich, D M; Skomorowski, W; Koch, C P; Mudrich, M

2015-01-01T23:59:59.000Z

456

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

457

Dynamic imaging with electron microscopy  

SciTech Connect (OSTI)

Livermore researchers have perfected an electron microscope to study fast-evolving material processes and chemical reactions. By applying engineering, microscopy, and laser expertise to the decades-old technology of electron microscopy, the dynamic transmission electron microscope (DTEM) team has developed a technique that can capture images of phenomena that are both very small and very fast. DTEM uses a precisely timed laser pulse to achieve a short but intense electron beam for imaging. When synchronized with a dynamic event in the microscope's field of view, DTEM allows scientists to record and measure material changes in action. A new movie-mode capability, which earned a 2013 R&D 100 Award from R&D Magazine, uses up to nine laser pulses to sequentially capture fast, irreversible, even one-of-a-kind material changes at the nanometer scale. DTEM projects are advancing basic and applied materials research, including such areas as nanostructure growth, phase transformations, and chemical reactions.

Campbell, Geoffrey; McKeown, Joe; Santala, Melissa

2014-02-20T23:59:59.000Z

458

The dynamics of fragment formation  

SciTech Connect (OSTI)

We demonstrate that in the Quantum Molecular Dynamics model, dynamical correlations can result in the production rate for final state nucleon clusters (and hence composite fragments) being higher than would be expected if statistics and the available phase space were dominant in determining composite formation. An intranuclear cascade or a Boltzmann-Uehling-Uhlenbeck model, combined with a statistical approach in the late stage of the collision to determine composites, provides an equivalent description only under limited conditions of centrality and beam energy. We use data on participant fragment production in Au + Au collisions in the Bevalac`s BOS time projection chamber to map out the parameter space where statistical clustering provides a good description. In particular, we investigate momentum-space densities of fragments up to {sup 4}He as a function of fragment transverse momentum, azimuth relative to the reaction plane, rapidity, multiplicity and beam energy.

Keane, D. [Kent State Univ., OH (United States); EOS Collaboration

1994-09-01T23:59:59.000Z

459

Interface dynamics for layered structures  

E-Print Network [OSTI]

We investigate dynamics of large scale and slow deformations of layered structures. Starting from the respective model equations for a non-conserved system, a conserved system and a binary fluid, we derive the interface equations which are a coupled set of equations for deformations of the boundaries of each domain. A further reduction of the degrees of freedom is possible for a non-conserved system such that internal motion of each domain is adiabatically eliminated. The resulting equation of motion contains only the displacement of the center of gravity of domains, which is equivalent to the phase variable of a periodic structure. Thus our formulation automatically includes the phase dynamics of layered structures. In a conserved system and a binary fluid, however, the internal motion of domains turns out to be a slow variable in the long wavelength limit because of concentration conservation. Therefore a reduced description only involving the phase variable is not generally justified.

Takao Ohta; David Jasnow

1997-07-17T23:59:59.000Z

460

Dynamic imaging with electron microscopy  

ScienceCinema (OSTI)

Livermore researchers have perfected an electron microscope to study fast-evolving material processes and chemical reactions. By applying engineering, microscopy, and laser expertise to the decades-old technology of electron microscopy, the dynamic transmission electron microscope (DTEM) team has developed a technique that can capture images of phenomena that are both very small and very fast. DTEM uses a precisely timed laser pulse to achieve a short but intense electron beam for imaging. When synchronized with a dynamic event in the microscope's field of view, DTEM allows scientists to record and measure material changes in action. A new movie-mode capability, which earned a 2013 R&D 100 Award from R&D Magazine, uses up to nine laser pulses to sequentially capture fast, irreversible, even one-of-a-kind material changes at the nanometer scale. DTEM projects are advancing basic and applied materials research, including such areas as nanostructure growth, phase transformations, and chemical reactions.

Campbell, Geoffrey; McKeown, Joe; Santala, Melissa

2014-05-30T23:59:59.000Z

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.


461

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

462

Dynamic response of guyed towers  

E-Print Network [OSTI]

guyed towers. A parametric study was conducted using eigen analysis to determine the effects of consistent mass, geometric stiffness and P-Delta gravity loads. Time domain solutions were obtained by direct integration for motion due to regular Stokes... guyed tower 2 References to guyed tower dynamic analysis 4 Effect of mass formulation on tower natural periods. 5 P-Delta effect on fundamental period. 6 Effect of axial compression on the 1st & 2nd mode. 7 Geometric stiffness effect on natural...

Gillcrist, Mark Christopher

2012-06-07T23:59:59.000Z

463

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

464

Brownian Dynamics without Green's Functions  

E-Print Network [OSTI]

We develop a Fluctuating Immersed Boundary (FIB) method for performing Brownian dynamics simulations of confined particle suspensions. Unlike traditional methods which employ analytical Green's functions for Stokes flow in the confined geometry, the FIB method uses a fluctuating finite-volume Stokes solver to generate the action of the response functions "on the fly". Importantly, we demonstrate that both the deterministic terms necessary to capture the hydrodynamic interactions among the suspended particles, as well as the stochastic terms necessary to generate the hydrodynamically-correlated Brownian motion, can be generated by solving the steady Stokes equations numerically only once per time step. This is accomplished by including a stochastic contribution to the stress tensor in the fluid equations consistent with fluctuating hydrodynamics. We develop novel temporal integrators that account for the multiplicative nature of the noise in the equations of Brownian dynamics and the strong dependence of the mobility on the configuration for confined systems. Notably, we propose a random finite difference approach to approximating the stochastic drift proportional to the divergence of the configuration-dependent mobility matrix. Through comparisons with analytical and existing computational results, we numerically demonstrate the ability of the FIB method to accurately capture both the static (equilibrium) and dynamic properties of interacting particles in flow.

S. Delong; F. Balboa Usabiaga; R. Delgado-Buscalioni; B. E. Griffith; A. Donev

2014-03-13T23:59:59.000Z

465

Brownian dynamics without Green's functions  

SciTech Connect (OSTI)

We develop a Fluctuating Immersed Boundary (FIB) method for performing Brownian dynamics simulations of confined particle suspensions. Unlike traditional methods which employ analytical Green's functions for Stokes flow in the confined geometry, the FIB method uses a fluctuating finite-volume Stokes solver to generate the action of the response functions on the fly. Importantly, we demonstrate that both the deterministic terms necessary to capture the hydrodynamic interactions among the suspended particles, as well as the stochastic terms necessary to generate the hydrodynamically correlated Brownian motion, can be generated by solving the steady Stokes equations numerically only once per time step. This is accomplished by including a stochastic contribution to the stress tensor in the fluid equations consistent with fluctuating hydrodynamics. We develop novel temporal integrators that account for the multiplicative nature of the noise in the equations of Brownian dynamics and the strong dependence of the mobility on the configuration for confined systems. Notably, we propose a random finite difference approach to approximating the stochastic drift proportional to the divergence of the configuration-dependent mobility matrix. Through comparisons with analytical and existing computational results, we numerically demonstrate the ability of the FIB method to accurately capture both the static (equilibrium) and dynamic properties of interacting particles in flow.

Delong, Steven; Donev, Aleksandar, E-mail: donev@courant.nyu.edu [Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States)] [Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States); Usabiaga, Florencio Balboa; Delgado-Buscalioni, Rafael [Departamento de Fsica Terica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Univeridad Autnoma de Madrid, Madrid 28049 (Spain)] [Departamento de Fsica Terica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Univeridad Autnoma de Madrid, Madrid 28049 (Spain); Griffith, Boyce E. [Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States) [Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States); Leon H. Charney Division of Cardiology, Department of Medicine, New York University School of Medicine, New York, New York 10016 (United States)

2014-04-07T23:59:59.000Z

466

Dynamics of evaporative colloidal patterning  

E-Print Network [OSTI]

Drying suspensions often leave behind complex patterns of particulates, as might be seen in the coffee stains on a table. Here we consider the dynamics of periodic band or uniform solid film formation on a vertical plate suspended partially in a drying colloidal solution. Direct observations allow us to visualize the dynamics of the band and film deposition, and the transition in between when the colloidal concentration is varied. A minimal theory of the liquid meniscus motion along the plate reveals the dynamics of the banding and its transition to the filming as a function of the ratio of deposition and evaporation rates. We also provide a complementary multiphase model of colloids dissolved in the liquid, which couples the inhomogeneous evaporation at the evolving meniscus to the fluid and particulate flows and the transition from a dilute suspension to a porous plug. This allows us to determine the concentration dependence of the bandwidth and the deposition rate. Together, our findings allow for the control of drying-induced patterning as a function of the colloidal concentration and evaporation rate.

C. Nadir Kaplan; Ning Wu; Shreyas Mandre; Joanna Aizenberg; L. Mahadevan

2014-12-04T23:59:59.000Z

467

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

468

Semiclassical analysis of quantum dynamics  

E-Print Network [OSTI]

Simulating the molecular dynamics (MD) using classical or semi-classical trajectories provides important details for the understanding of many chemical reactions, protein folding, drug design, and solvation effects. MD simulations using trajectories have achieved great successes in the computer simulations of various systems, but it is difficult to incorporate quantum effects in a robust way. Therefore, improving quantum wavepacket dynamics and incorporating nonadiabatic transitions and quantum effects into classical and semi-classical molecular dynamics is critical as well as challenging. In this paper, we present a MD scheme in which a new set of equations of motion (EOM) are proposed to effectively propagate nuclear trajectories while conserving quantum mechanical energy which is critical for describing quantum effects like tunneling. The new quantum EOM is tested on a one-state one-dimensional and a two-state two-dimensional model nonadiabatic systems. The global quantum force experienced by each trajectory promotes energy redistribution among the bundle of trajectories, and thus helps the individual trajectory tunnel through the potential barrier higher than the energy of the trajectory itself. Construction of the new quantum force and EOM also provides a better way to treat the issue of back-reaction in mixed quantum-classical (MQC) methods, i.e. self-consistency between quantum degrees of freedom (DOF) and classical DOF.

Siyang Yang

2011-11-15T23:59:59.000Z

469

Earth materials and earth dynamics  

SciTech Connect (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

470

Introduction to Molecular Dynamics and Accelerated Molecular Dynamics  

SciTech Connect (OSTI)

We first introduce classical molecular dynamics (MD) simulations. We discuss their main constituents - the interatomic potentials, the boundary conditions, and the integrators - and the discuss the various ensembles that can be sampled. We discuss the strengths and weaknesses of MD, specifically in terms of time and length-scales. We then move on to discuss accelerated MD (AMD) methods, techniques that were designed to circumvent the timescale limitations of MD for rare event systems. The different methods are introduced and examples of use given.

Perez, Danny [Los Alamos National Laboratory

2012-06-25T23:59:59.000Z

471

Dynamic  

Office of Legacy Management (LM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*. . : '* FEB1 Rev.DATA DECISIONDynamic ,

472

Fast prediction of transient stability margin in systems with SVC control and HVDC link  

SciTech Connect (OSTI)

Recent developments in transient stability margin (TSM) prediction using the energy-based direct method have included excitation controllers, power system stabilizers (PSSs) and/or static VAr compensators (SVCs). These devices can be represented in their detailed dynamic models to desired degrees of complexity while the proposed extended equal-area criterion can still be effectively applied. This paper describes further development of this technique to incorporate an HVDC transmission into the test network for TSM prediction. The method is examined with a practical 17-machine power network representing the South China/Hong Kong system. An SVC control scheme is also installed in a weak bus of the test network for transient stability improvement. The results obtained show that there is no sacrifice in accuracy, speed or reliability of the TSM method with SVC and HVDC realistically incorporated into the study.

Tso, S.K. [City Univ. of Hong Kong (Hong Kong). Dept. of Manufacturing Engineering; Cheung, S.P. [ABB Transmission and Distribution Ltd., Hong Kong (Hong Kong). Dept. of Power Systems

1995-12-31T23:59:59.000Z

473

Brownian Dynamics Simulation of Protein Solutions: Structural and Dynamical Properties  

SciTech Connect (OSTI)

The study of solutions of biomacromolecules provides an important basis for understanding the behavior of many fundamental cellular processes, such as protein folding, self-assembly, biochemical reactions, and signal transduction. Here, we describe a Brownian dynamics simulation procedure and its validation for the study of the dynamic and structural properties of protein solutions. In the model used, the proteins are treated as atomically detailed rigid bodies moving in a continuum solvent. The protein-protein interaction forces are described by the sum of electrostatic interaction, electrostatic desolvation, nonpolar desolvation, and soft-core repulsion terms. The linearized Poisson-Boltzmann equation is solved to compute electrostatic terms. Simulations of homogeneous solutions of three different proteins with varying concentrations, pH, and ionic strength were performed. The results were compared to experimental data and theoretical values in terms of long-time self-diffusion coefficients, second virial coefficients, and structure factors. The results agree with the experimental trends and, in many cases, experimental values are reproduced quantitatively. There are no parameters specific to certain protein types in the interaction model, and hence the model should be applicable to the simulation of the behavior of mixtures of macromolecules in cell-like crowded environments.

Mereghetti, Paolo; Gabdoulline, Razif; Wade, Rebecca C.

2010-12-01T23:59:59.000Z

474

Dynamic reduction, Version 1. 0  

SciTech Connect (OSTI)

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

475

Why quantum dynamics is linear  

E-Print Network [OSTI]

Quantum dynamics is linear. How do we know? From theory or experiment? The history of this question is reviewed. Nonlinear generalizations of quantum mechanics have been proposed. They predict small but clear nonlinear effects, which very accurate experiments have not seen. Is there a reason in principle why nonlinearity is not found? Is it impossible? Does quantum dynamics have to be linear? Attempts to prove this have not been decisive, because either their assumptions are not compelling or their arguments are not conclusive. The question has been left unsettled. There is a simple answer, based on a simple assumption. It was found in two steps separated by 44 years. They are steps back to simpler and more compelling assumptions. A proof of the assumptions of the Wigner-Bargmann proof has been known since 1962. It assumes that the maps of density matrices in time are linear. For this step, it is also assumed that density matrices are mapped one-to-one onto density matrices. An alternative is to assume that pure states are mapped one-to-one onto pure states and that entropy does not decrease. In a step taken in 2006, it is proved that the maps of density matrices in time are linear. It is assumed, as in the earlier step, that at each time the physical quantities and states are described by the usual linear structures of quantum mechanics, so the question is only about how things change in time. Beyond that, the proof assumes only that the dynamics does not depend on anything outside the system, but must allow the system to be described as part of a larger system.

Thomas F. Jordan

2007-02-16T23:59:59.000Z

476

A Relativistic Dynamical Collapse Model  

E-Print Network [OSTI]

A model is discussed where all operators are constructed from a quantum scalar field whose energy spectrum takes on all real values. The Schr\\"odinger picture wave function depends upon space and time coordinates for each particle, as well as an inexorably increasing evolution parameter $s$ which labels a foliation of space-like hypersurfaces. The model is constructed to be manifestly Lorentz invariant in the interaction picture. Free particle states and interactions are discussed in this framework. Then, the formalism of the CSL (Continuous Spontaneous Localization) theory of dynamical collapse is applied. The collapse-generating operator is chosen to to be the particle number space-time density. Unlike previous relativistically invariant models, the vacuum state is not excited. The collapse dynamics depends upon two parameters, a parameter $\\Lambda$ which represents the collapse rate/volume and a scale factor $\\ell$. A common example of collapse dynamics, involving a clump of matter in a superposition of two locations, is analyzed. The collapse rate is shown to be identical to that of non-relativistic CSL when the GRW-CSL choice of $\\ell=a=10^{-5}$cm, is made, along with $\\Lambda=\\lambda/a^{3}$ (GRW-CSL choice $\\lambda=10^{-16}s^{-1}$). However, it is also shown that the change of mass of a nucleon over the age of the universe is then unacceptably large. The case where $\\ell$ is the size of the universe is then considered. It is shown that the collapse behavior is satisfactory and the change of mass over the age of the universe is acceptably small, when $\\Lambda= \\lambda/\\ell a^{2}$.

Philip Pearle

2014-12-21T23:59:59.000Z

477

Loop shaping of structural dynamics  

E-Print Network [OSTI]

Ratios. . 51 5 Constant Current Tests. 6 Varying Current Tests 75 79 LIST OF FIGURES Figure Page 1 Idealized Multiple-Degree-of Freedom Structure. 2 Induced Matrix Norm. 13 3 System G(s) . 15 4 Singular Values of Displacement Response... in terms of the expected values of stochastic signals. All of these various interpretations make the H?norm useful in engineering applications. 15 w(t) G(s) z(t) Fig. 3. System G(s) 2. 3 Singular Values of Structural Dynamics 2. 3. 1 Displacement...

Kim, Byeong Hwa

1999-01-01T23:59:59.000Z

478

Competitive Dynamics of Web Sites  

E-Print Network [OSTI]

We present a dynamical model of web site growth in order to explore the effects of competition among web sites and to determine how they affect the nature of markets. We show that under general conditions, as the competition between sites increases, the model exhibits a sudden transition from a regime in which many sites thrive simultaneously, to a "winner take all market" in which a few sites grab almost all the users, while most other sites go nearly extinct. This prediction is in agreement with recent measurements on the nature of electronic markets.

Sebastian M. Maurer; Bernardo A. Huberman

2000-03-17T23:59:59.000Z

479

The dynamic sphere test problem  

SciTech Connect (OSTI)

In this manuscript we define the dynamic sphere problem as a spherical shell composed of a homogeneous, linearly elastic material. The material exhibits either isotropic or transverse isotropic symmetry. When the problem is formulated in material coordinates, the balance of mass equation is satisfied automatically. Also, the material is assumed to be kept at constant temperature, so the only relevant equation is the equation of motion. The shell has inner radius r{sub i} and outer radius r{sub o}. Initially, the shell is at rest. We assume that the interior of the shell is a void and we apply a time-varying radial stress on the outer surface.

Chabaud, Brandon M. [Los Alamos National Laboratory; Brock, Jerry S. [Los Alamos National Laboratory; Smith, Brandon M. [Los Alamos National Laboratory

2012-05-16T23:59:59.000Z

480

Dynamic Windows | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in Review: TopEnergy DOEDealingVehicle1 Closing the Circle:Durability WorkingDynamic

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.


481

Dynamic Engineering | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address:011-DNA Jump37. It is classified as ASHRAEDuval County, Texas: EnergyDyerDynEcoDynamic

482

LANL | Physics | Dynamic Plutonium Experiments  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfraredJeffersonJonathanMultimaterial2Recovery Act Job FairDynamic plutonium

483

Turbo Dynamics | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:Toyo AluminiumCityTullahoma,Turbo Dynamics Jump

484

Dynamical Heterogeneities in Grains and Foams  

E-Print Network [OSTI]

Dynamical heterogeneities have been introduced in the context of the glass transition of molecular liquids and the lengthscale associated with them has been argued to be at the origin of the observed quasi-universal behaviour of glassy systems. Dense amorphous packings of granular media and foams also exhibit slow dynamics, intermittency and heterogeneities. We review a number of recent experimental studies of these systems, where one has direct access to the relevant space-time dynamics, allowing for direct visualisations of the dynamical heterogeneities. On one hand these visualisations provide a unique opportunity to access the microscopic mechanisms responsible for the growth of dynamical correlations. On the other hand focussing on the differences in these heterogeneities in microscopically different systems allows to discuss the range of the analogies between molecular thermal glasses and athermal glasses such as granular media and foams. Finally this review is the opportunity to discuss various approaches to actually extract quantitatively the dynamical lengthscale from experimental data.

Olivier Dauchot; Douglas J. Durian; Martin van Hecke

2010-10-05T23:59:59.000Z

485

Dynamical analysis of highly excited molecular spectra  

SciTech Connect (OSTI)

The goal of this program is new methods for analysis of spectra and dynamics of highly excited vibrational states of molecules. In these systems, strong mode coupling and anharmonicity give rise to complicated classical dynamics, and make the simple normal modes analysis unsatisfactory. New methods of spectral analysis, pattern recognition, and assignment are sought using techniques of nonlinear dynamics including bifurcation theory, phase space classification, and quantization of phase space structures. The emphasis is chaotic systems and systems with many degrees of freedom.

Kellman, M.E. [Univ. of Oregon, Eugene (United States)

1993-12-01T23:59:59.000Z

486

Quantum discord dynamics in structured reservoirs  

E-Print Network [OSTI]

The non-Markovian master equations are derived to study quantum discord dynamics of two qubits coupled to a common reservoir and two independent reservoirs, respectively. We compare the dynamics under different parameters, such as reservoir spectra and resonant parameters, at high temperature and at zero temperature. The results indicate that the dynamics at these two extreme temperatures share similar characters, as well as differences.

Z. -K. Su; S. -J. Jiang

2011-05-25T23:59:59.000Z

487

Reservoir cross-over in entanglement dynamics  

E-Print Network [OSTI]

We study the effects of spontaneous emission on the entanglement dynamics of two qubits interacting with a common Lorentzian structured reservoir. We assume that the qubits are initially prepared in a Bell-like state. We focus on the strong coupling regime and study the entanglement dynamics for different regions of the spontaneous emission decay parameter. This investigation allows us to explore the cross-over between common and independent reservoirs in entanglement dynamics.

L. Mazzola; S. Maniscalco; K. -A. Suominen; B. M. Garraway

2009-08-28T23:59:59.000Z

488

Mapping molecular dynamics computations to hypercubes  

E-Print Network [OSTI]

December 1993 Major Subject: ('omputer Science MAPPING MOLECULAR DYNAMICS COMPUTATIONS TO HYPERCUBES A Thesis by VAMSEE IvRISHNA LAIvAMSANI Submitted to Texas AX. 'M University in partial fnlfillment of the requirements for the degree of lv... for systematic modeling, mapping and perfornianrc analysis of a Grand Challenge application problein in computational biology called Moleru- lar Dynamics S&tnufat&un uj Proteins Molecular Dynamics (MD) is an important techn&que used m computational...

Lakamsani, Vamsee Krishna

1993-01-01T23:59:59.000Z

489

Kinetic limits of dynamical systems  

E-Print Network [OSTI]

Since the pioneering work of Maxwell and Boltzmann in the 1860s and 1870s, a major challenge in mathematical physics has been the derivation of macroscopic evolution equations from the fundamental microscopic laws of classical or quantum mechanics. Macroscopic transport equations lie at the heart of many important physical theories, including fluid dynamics, condensed matter theory and nuclear physics. The rigorous derivation of macroscopic transport equations is thus not only a conceptual exercise that establishes their consistency with the fundamental laws of physics: the possibility of finding deviations and corrections to classical evolution equations makes this subject both intellectually exciting and relevant in practical applications. The plan of these lectures is to develop a renormalisation technique that will allow us to derive transport equations for the kinetic limits of two classes of simple dynamical systems, the Lorentz gas and kicked Hamiltonians (or linked twist maps). The technique uses the ergodic theory of flows on homogeneous spaces (homogeneous flows for short), and is based on joint work with Andreas Str\\"ombergsson.

Jens Marklof

2014-08-06T23:59:59.000Z

490

Dynamical Scaling of Polymerized Membranes  

E-Print Network [OSTI]

Monte Carlo simulations have been performed to analyze the sub-diffusion dynamics of a tagged monomer in self-avoiding polymerized membranes in the flat phase. By decomposing the mean square displacement into the out-of-plane ($\\parallel$) and the in-plane ($\\perp$) components, we obtain good data collapse with two distinctive diffusion exponents $2 \\alpha_{\\parallel} = 0.36 \\pm 0.01$ and $2 \\alpha_{\\perp} = 0.21 \\pm 0.01$, and the roughness exponents $\\zeta_{\\parallel} = 0.6 \\pm 0.05$ and $\\zeta_{\\perp} = 0.25 \\pm 0.05 $, respectively for each component. Their values are consistent with the relation from the rotational symmetry. We derive the generalized Langevin equations to describe the sub-diffusional behaviors of a tagged monomer in the intermediate time regime where the collective effect of internal modes in the membrane dominate the dynamics to produce negative memory kernels with a power-law. We also briefly discuss how the long-range hydrodynamic interactions alter the exponents.

Ken-ichi Mizuochi; Hiizu Nakanishi; Takahiro Sakaue

2014-07-17T23:59:59.000Z

491

Pre-equilibrium plasma dynamics  

SciTech Connect (OSTI)

Approaches towards understanding and describing the pre-equilibrium stage of quark-gluon plasma formation in heavy-ion collisions are reviewed. Focus is on a kinetic theory approach to non-equilibrium dynamics, its extension to include the dynamics of color degrees of freedom when applied to the quark-gluon plasma, its quantum field theoretical foundations, and its relationship to both the particle formation stage at the very beginning of the nuclear collision and the hydrodynamic stage at late collision times. The usefulness of this approach to obtain the transport coefficients in the quark-gluon plasma and to derive the collective mode spectrum and damping rates in this phase are discussed. Comments are made on the general difficulty to find appropriated initial conditions to get the kinetic theory started, and a specific model is given that demonstrates that, once given such initial conditions, the system can be followed all the way through into the hydrodynamical regime. 39 refs., 7 figs. (LEW)

Heinz, U.

1986-01-01T23:59:59.000Z

492

Dynamic Testing of Gasifier Refractory  

SciTech Connect (OSTI)

The University of North Dakota (UND) Chemical Engineering Department in conjunction with the UND Energy & Environmental Research Center (EERC) have initiated a program to thoroughly examine the combined chemical (reaction and phase change) and physical (erosion) effects experienced by a variety of refractory materials during both normal operation and thermal cycling under slagging coal gasification conditions. The goal of this work is to devise a mechanism of refractory loss under these conditions. The controlled-atmospheric dynamic corrodent application furnace (CADCAF) is being utilized to simulate refractory/slag interactions under dynamic conditions that more realistically simulate the environment in a slagging coal gasifier than any of the static tests used previously by refractory manufacturers and researchers. Shakedown testing of the CADCAF has been completed. Samples of slag and refractory from the Tampa Electric Polk Power Station have been obtained for testing in the CADCAF. The slag has been dried and sieved to the size needed for our flowing slag corrosion tests. Screening tests are in currently in progress. Detailed analysis of corrosion rates from the first tests is in progress.

Michael D. Mann; Devdutt Shukla; Xi Hong; John P. Hurley

2004-09-27T23:59:59.000Z

493

Dynamic Testing of Gasifier Refractory  

SciTech Connect (OSTI)

The University of North Dakota (UND) Chemical Engineering Department in conjunction with the UND Energy & Environmental Research Center (EERC) have initiated a program to thoroughly examine the combined chemical (reaction and phase change) and physical (erosion) effects experienced by a variety of refractory materials during both normal operation and thermal cycling under slagging coal gasification conditions. The goal of this work is to devise a mechanism of refractory loss under these conditions. The controlled-atmospheric dynamic corrodent application furnace (CADCAF) is being utilized to simulate refractory/slag interactions under dynamic conditions that more realistically simulate the environment in a slagging coal gasifier than any of the static tests used previously by refractory manufacturers and researchers. Shakedown testing of the CADCAF is in progress. Samples of slag and refractory from the Tampa Electric Polk Power Station have been obtained for testing in the CADCAF. The slag has been dried and sieved to the size needed for our flowing slag corrosion tests. Testing is expected to begin in October.

Michael D. Mann; Devdutt Shukla; John P. Hurley

2003-09-27T23:59:59.000Z

494

Dynamics of hydrogen in silicon  

SciTech Connect (OSTI)

The frequency of local hydrogen vibration in silicon and its decay process have been studied theoretically. It is believed that the H in Si is located at the bond center in equilibrium. By analyzing the discrepancy between the frequency of the antisymmetric stretching mode in a frozen-phonon calculation and the frequency in a molecular dynamic simulation, it is found that the SiHSi bond is dynamically bending. The reason is that the adiabatic potential along a direction perpendicular to the bond axis is so flat that random thermal motion of atoms easily scatters the H atom from the axis. A fast relaxation (?1 ps) around the axis hides this bending from observation by slow-response measurements. One consequence of the bending is that it renders the frequency of the symmetric stretching mode higher than when the bond is not bent. Another, more interesting consequence of this bending is the fast decay rate of the antisymmetric stretching mode, in spite of its local-mode character. Again, the ease of conversion of the H motion from parallel to perpendicular to the bond axis is the cause of this fast decay, which is otherwise difficult to explain by a simple combination law of frequencies.

Shirai, Koun [ISIR, Osaka University, 8-1, Mihogaoka, Ibaraki, Osaka 567-0047 (Japan); Hamada, Ikutaro [International Center for Materials Nanoarchitectonics, NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Katayama-Yoshida, Hiroshi [Grad. School of Eng. Sci., Osaka University, 1-3, Machikaneyama, Toyonaka 560-8531 (Japan)

2014-02-21T23:59:59.000Z

495

Dynamics of the Galaxy's Satellites  

E-Print Network [OSTI]

The Milky Way's satellites provide unique information about the density of the Galactic halo at large radii. The inclusion of even a few rather inaccurate proper motions resolves an ambiguity in older mass estimates in favour of higher values. Many of the satellites are concentrated into streams. The dynamics of the Magellanic Stream provided an early indication that the halo reaches out to beyond 100 kpc. Tidal forces between the Clouds are currently disturbing the Clouds' internal dynamics. One would expect this damage to worsen rapidly as the tidal field of the MW excites the eccentricity of the Clouds' mutual orbit. This process, which has yet to be completely modelled, is important for understanding the degree of self-lensing in searches for gravitational lensing events. The Sagittarius Dwarf galaxy very likely contributes significantly to the Galactic warp. The direction of the warp's line of nodes is incorrectly predicted by the simplest models of the Dwarf's orbit. More sophisticated models, in which a complex distribution of stripped dark matter is predicted, may be more successful.

James Binney

2000-06-28T23:59:59.000Z

496

Event-driven multithreaded dynamic optimization  

E-Print Network [OSTI]

percent dynamic loads Hits-prefetched Partial-prefetchedlead to partial prefetching. That is, the load la- tency ispartial monitoring window. After all of the delinquent loads

Zhang, Weifeng

2006-01-01T23:59:59.000Z

497

COLLOQUIUM: Controlling Quantum Dynamics | Princeton Plasma Physics...  

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

Controlling Quantum Dynamics Professor Herschel Rabitz Princeton University Contact Information Coordinator(s): Miss Carol Ann Au caustin@pppl.gov Host(s): Dr. Elena Belova ebelova...

498

Controlling Complex Systems and Developing Dynamic Technology  

E-Print Network [OSTI]

the power output of steam engines to feed the factories ofas a whole, the governed steam engine becomes a less dynamic

Avizienis, Audrius Victor

2013-01-01T23:59:59.000Z

499

Quantitative Modeling of High Temperature Magnetization Dynamics  

SciTech Connect (OSTI)

Final Technical Report Project title: Quantitative Modeling of High Temperature Magnetization Dynamics DOE/Office of Science Program Manager Contact: Dr. James Davenport

Zhang, Shufeng

2009-03-01T23:59:59.000Z

500

Dynamical ensembles equivalence in fluid mechanics  

E-Print Network [OSTI]

Dissipative Euler and Navier Stokes equations are discussed with the aim of proposing several experiments apt to test the equivalence of dynamical ensembles and the chaotic hypothesis.

Giovanni Gallavotti

1996-05-09T23:59:59.000Z