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1

Frequency regulator for synchronous generators  

DOE Patents [OSTI]

The present invention is directed to a novel frequency regulator which controls a generator output frequency for variations in both the input power to the generator and the power supplied to an uncontrolled external load. The present invention further includes over current and current balance protection devices which are relatively inexpensive to manufacture, which may be encapsulated to provide protection from the operating environment and which respond more quickly than previously known electromechanical devices.

Karlicek, Robert F. (1920 Camino Centroloma, Fullerton, CA 92633)

1982-01-01T23:59:59.000Z

2

Frequency regulator for synchronous generators  

DOE Patents [OSTI]

The present invention is directed to a novel frequency regulator which controls a generator output frequency for variations in both the input power to the generator and the power supplied to an uncontrolled external load. The present invention further includes over current and current balance protection devices which are relatively inexpensive to manufacture, which may be encapsulated to provide protection from the operating environment and which respond more quickly than previously known electromechanical devices. 11 figs.

Karlicek, R.F.

1982-08-10T23:59:59.000Z

3

Energy storage for frequency regulation on the electric grid  

E-Print Network [OSTI]

Ancillary services such as frequency regulation are required for reliable operation of the electric grid. Currently, the same traditional thermal generators that supply bulk power also perform nearly all frequency regulation. ...

Leitermann, Olivia

2012-01-01T23:59:59.000Z

4

Energy storage for frequency regulation on the electric grid .  

E-Print Network [OSTI]

??Ancillary services such as frequency regulation are required for reliable operation of the electric grid. Currently, the same traditional thermal generators that supply bulk power… (more)

Leitermann, Olivia

2012-01-01T23:59:59.000Z

5

High Precision Measurements Using High Frequency Signals  

E-Print Network [OSTI]

Generalized lock-in amplifiers use digital cavities with Q-factors as high as 5X10^8. In this letter, we show that generalized lock-in amplifiers can be used to analyze microwave (giga-hertz) signals with a precision of few tens of hertz. We propose that the physical changes in the medium of propagation can be measured precisely by the ultra-high precision measurement of the signal. We provide evidence to our proposition by verifying the Newton's law of cooling by measuring the effect of change in temperature on the phase and amplitude of the signals propagating through two calibrated cables. The technique could be used to precisely measure different physical properties of the propagation medium, for example length, resistance, etc. Real time implementation of the technique can open up new methodologies of in-situ virtual metrology in material design.

Jin, Aohan; Sakurai, Atsunori; Liu, Liang; Edman, Fredrik; Öwall, Viktor; Pullerits, Tonu; Karki, Khadga J

2014-01-01T23:59:59.000Z

6

Low Audio-frequency Electromagnetic Signals of Natural Origin  

Science Journals Connector (OSTI)

... a year ago, we undertook a programme of measurement of natural electromagnetic signals in the audio-frequency range 25-130 cycles/sec, with the view of gathering evidence concerning their ...

R. E. HOLZER; O. E. DEAL

1956-03-17T23:59:59.000Z

7

Radio Frequency Identification : regulating information privacy protection  

E-Print Network [OSTI]

As applications of Radio Frequency Identification (RFID) become more profuse, the technology itself is stirring up some controversy. Due to its potential for amassing large amounts of information about both people and ...

Laufer, Deanna (Deanna Raquel)

2007-01-01T23:59:59.000Z

8

A system for tranmitting low frequency analog signals over ac power lines  

DOE Patents [OSTI]

A system for transmitting low frequency analog signals over ac power lines using FM modulation. A low frequency analog signal to be transmitted is first applied to a voltage-to-frequency converter where it is converted to a signal whose frequency varies in proportion to the analog signal amplitude. This signal is then used to modulate the carrier frequency of an FM transmitter coupled to an ac power line. The modulation signal frequency range is selected to be within the response band of the FM transmitter. The FM modulated carrier signal is received by an FM receiver coupled to the ac power line, demodulated and the demodulated signal frequency is converted by a frequency-to-voltage converter back to the form of the original low frequency analog input signal. 4 figs.

Baker, S.P.; Durall, R.L.; Haynes, H.D.

1987-07-30T23:59:59.000Z

9

System for transmitting low frequency analog signals over AC power lines  

DOE Patents [OSTI]

A system for transmitting low frequency analog signals over AC power lines using FM modulation. A low frequency analog signal to be transmitted is first applied to a voltage-to-frequency converter where it is converted to a signal whose frequency varies in proportion to the analog signal amplitude. This signal is then used to modulate the carrier frequency of an FM transmitter coupled to an AC power line. The modulation signal frequency range in selected to be within the response band of the FM transmitter. The FM modulated carrier signal is received by an FM receiver coupled to the AC power line, demodulated and the demodulated signal frequency is converted by a frequency-to-voltage converter back to the form of the original low frequency analog input signal.

Baker, Steven P. (Powell, TN); Durall, Robert L. (Lenoir City, TN); Haynes, Howard D. (Knoxville, TN)

1989-01-01T23:59:59.000Z

10

Simulation and Modeling Techniques for Signal Integrity and Electromagnetic Interference on High Frequency Electronic Systems.  

E-Print Network [OSTI]

Simulation and Modeling Techniques for Signal Integrity and Electromagnetic Interference on High and Modeling Techniques for Signal Integrity and Electromagnetic Interference on High Frequency Electronic Integrity and Electromagnetic Interference on High Frequency Electronic Systems. by Luca Daniel Doctor

Daniel, Luca

11

Instantaneous frequency and amplitude of orthocomplex modulated signals based on quaternion Fourier transform  

Science Journals Connector (OSTI)

The ideas of instantaneous amplitude and phase are well understood for signals with real-valued samples, based on the analytic signal which is a complex signal with one-sided Fourier transform. We explore the extension of these ideas to signals with ... Keywords: Instantaneous frequency, Orthocomplex modulation, Quaternion Fourier transform

Nicolas Le Bihan; Stephen J. Sangwine; Todd A. Ell

2014-01-01T23:59:59.000Z

12

NEW ASPECTS OF SOME SMALL-SIGNAL ac FREQUENCY RESPONSE FUNCTIONS J. Ross MACDONALD  

E-Print Network [OSTI]

NEW ASPECTS OF SOME SMALL-SIGNAL ac FREQUENCY RESPONSE FUNCTIONS J. Ross MACDONALD Department. It was shown by Macdonald and Cook [5] that an admittance closely related to eq. (1) with n 1 = 0 and n 2 = n]. This analysis showed that #12;160 J. Ross Macdonald/Small-signal ac frequency response functions the data did

Macdonald, James Ross

13

Frequency Shift of Radio Signals in Curved Spacetimes  

E-Print Network [OSTI]

space . . . . . . . . . . . . . . . . . . . . . . . . . . 21 7.2 Schwarzschild space . . . . . . . . . . . . . . . 33 10 Another source of the shift in frequency 34 10.1 Reflection in a relativistically moving mirror

14

Fisetin regulates obesity by targeting mTORC1 signaling  

Science Journals Connector (OSTI)

Abstract Fisetin, a flavonol present in vegetables and fruits, possesses antioxidative and anti-inflammatory properties. In this study, we have demonstrated that fisetin prevents diet-induced obesity through regulation of the signaling of mammalian target of rapamycin complex 1 (mTORC1), a central mediator of cellular growth, cellular proliferation and lipid biosynthesis. To evaluate whether fisetin regulates mTORC1 signaling, we investigated the phosphorylation and kinase activity of the 70-kDa ribosomal protein S6 kinase 1 (S6K1) and mTORC1 in 3T3-L1 preadipocytes. Fisetin treatment of preadipocytes reduced the phosphorylation of S6K1 and mTORC1 in a time- and concentration-dependent manner. To further our understanding of how fisetin negatively regulates mTORC1 signaling, we analyzed the phosphorylation of S6K1, mTOR and Akt in fisetin-treated TSC2-knockdown cells. The results suggested that fisetin treatment inhibits mTORC1 activity in an Akt-dependent manner. Recent studies have shown that adipocyte differentiation is dependent on mTORC1 activity. Fisetin treatment inhibited adipocyte differentiation, consistent with the negative effect of fisetin on mTOR. The inhibitory effect of fisetin on adipogenesis is dependent of mTOR activity, suggesting that fisetin inhibits adipogenesis and the accumulation of intracellular triglycerides during adipocyte differentiation by targeting mTORC1 signaling. Fisetin supplementation in mice fed a high-fat diet (HFD) significantly attenuated HFD-induced increases in body weight and white adipose tissue. We also observed that fisetin efficiently suppressed the phosphorylation of Akt, S6K1 and mTORC1 in adipose tissue. Collectively, these results suggest that inhibition of mTORC1 signaling by fisetin prevents adipocyte differentiation of 3T3-L1 preadipocytes and obesity in HFD-fed mice. Therefore, fisetin may be a useful phytochemical agent for attenuating diet-induced obesity.

Chang Hwa Jung; Heemun Kim; Jiyun Ahn; Tae-Il Jeon; Dae-Hee Lee; Tae-Youl Ha

2013-01-01T23:59:59.000Z

15

Encoding Communication Signals with Timescale Separation by Spike Frequency Adaptation  

E-Print Network [OSTI]

Apteronotus leptorhynchus pro- duces a continuous quasi-sinusoidal electric field (EOD, 600 - 1100Hz) which the EOD frequency is raised by about 30 to 150 Hz during 10 to 20 ms, resulting in a phase advance by as little as 1/2 to 1 1/2 EOD period. In the presence of a second fish with EOD frequency f2 a beat arises

Benda, Jan

16

Detection of Stochastic Signals in the Frequency Domain  

E-Print Network [OSTI]

(n) is a stochastic signal independent of the back- ground zeromean Gaussian white noisesequence (n). The problem, Canada K7K 5L0. H.C. So is with the Department of Electronic Engineering, City University of Hong Kong of radiometers, energy detector and quadratic detector 2]. It is optimum if s(n) is a Gaussian bandlimited white

So, Hing-Cheung

17

Frequency of spontaneous BOLD signal shifts during infancy and correlates with cognitive performance  

Science Journals Connector (OSTI)

Abstract Numerous studies have been conducted to delineate the early development of different functional networks, based on measuring the temporal synchronization of spontaneous blood oxygenation level-dependent (BOLD) signals acquired using resting state functional MRI (rsfMRI). However, little attention has been paid to the change of the frequency properties of these signals during early brain development. Such frequency properties may reflect important physiological changes and potentially have significant cognitive consequences. In this study, leveraging a large (N = 86 subjects), longitudinal sample of human infants scanned during the first two years of life, we aimed to specifically delineate the developmental changes of the frequency characteristics of spontaneous BOLD signals. Both whole-brain and network-level examinations were carried out and the frequency–behavior relationship was explored. Our results revealed a clear right-ward shift of BOLD signal frequency during the first year of life. Moreover, the power at the peak-frequency for sensorimotor and lateral visual networks correlates with domain-specific Mullen Scales in 1-year-olds, suggesting the behavioral significance of the BOLD signal frequency during infancy. Findings from this study shed light into early functional brain development and provide a new perspective for future searches for functional developmental abnormalities.

Sarael Alcauter; Weili Lin; J. Keith Smith; Barbara D. Goldman; J. Steven Reznick; John H. Gilmore; Wei Gao

2015-01-01T23:59:59.000Z

18

System and method for constructing filters for detecting signals whose frequency content varies with time  

DOE Patents [OSTI]

A system and method for constructing a bank of filters which detect the presence of signals whose frequency content varies with time. The present invention includes a novel system and method for developing one or more time templates designed to match the received signals of interest and the bank of matched filters use the one or more time templates to detect the received signals. Each matched filter compares the received signal x(t) with a respective, unique time template that has been designed to approximate a form of the signals of interest. The robust time domain template is assumed to be of the order of w(t)=A(t)cos{2.pi..phi.(t)} and the present invention uses the trajectory of a joint time-frequency representation of x(t) as an approximation of the instantaneous frequency function {.phi.'(t). First, numerous data samples of the received signal x(t) are collected. A joint time frequency representation is then applied to represent the signal, preferably using the time frequency distribution series (also known as the Gabor spectrogram). The joint time-frequency transformation represents the analyzed signal energy at time t and frequency .function., P(t,f), which is a three-dimensional plot of time vs. frequency vs. signal energy. Then P(t,f) is reduced to a multivalued function f(t), a two dimensional plot of time vs. frequency, using a thresholding process. Curve fitting steps are then performed on the time/frequency plot, preferably using Levenberg-Marquardt curve fitting techniques, to derive a general instantaneous frequency function .phi.'(t) which best fits the multivalued function f(t), a trajectory of the joint time-frequency domain representation of x(t). Integrating .phi.'(t) along t yields .phi.(t), which is then inserted into the form of the time template equation. A suitable amplitude A(t) is also preferably determined. Once the time template has been determined, one or more filters are developed which each use a version or form of the time template.

Qian, Shie (Austin, TX); Dunham, Mark E. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

19

Detectability of Radio Frequency Interference due to Spread Spectrum Communication Signals using the  

E-Print Network [OSTI]

Detectability of Radio Frequency Interference due to Spread Spectrum Communication Signals using-- Analysis of detectability of the kurtosis algorithm for pulsed-sinusoidal Radio Frequency Interference (RFI) has already been performed in detail. The detectability for wide- band spread-spectrum RFI

Ruf, Christopher

20

System and method for constructing filters for detecting signals whose frequency content varies with time  

DOE Patents [OSTI]

A system and method are disclosed for constructing a bank of filters which detect the presence of signals whose frequency content varies with time. The present invention includes a novel system and method for developing one or more time templates designed to match the received signals of interest and the bank of matched filters use the one or more time templates to detect the received signals. Each matched filter compares the received signal x(t) with a respective, unique time template that has been designed to approximate a form of the signals of interest. The robust time domain template is assumed to be of the order of w(t)=A(t)cos(2{pi}{phi}(t)) and the present invention uses the trajectory of a joint time-frequency representation of x(t) as an approximation of the instantaneous frequency function {phi}{prime}(t). First, numerous data samples of the received signal x(t) are collected. A joint time frequency representation is then applied to represent the signal, preferably using the time frequency distribution series. The joint time-frequency transformation represents the analyzed signal energy at time t and frequency f, P(t,f), which is a three-dimensional plot of time vs. frequency vs. signal energy. Then P(t,f) is reduced to a multivalued function f(t), a two dimensional plot of time vs. frequency, using a thresholding process. Curve fitting steps are then performed on the time/frequency plot, preferably using Levenberg-Marquardt curve fitting techniques, to derive a general instantaneous frequency function {phi}{prime}(t) which best fits the multivalued function f(t). Integrating {phi}{prime}(t) along t yields {phi}{prime}(t), which is then inserted into the form of the time template equation. A suitable amplitude A(t) is also preferably determined. Once the time template has been determined, one or more filters are developed which each use a version or form of the time template. 7 figs.

Qian, S.; Dunham, M.E.

1996-11-12T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

PEV-Based Combined Frequency and Voltage Regulation for Smart Grid  

E-Print Network [OSTI]

by either adjusting supply or changing demand. While various demand side management programs have used benefit both users and utilities. Index Terms--Smart grid, plug-in electric vehicles, demand side management, reactive power compensation, ancillary ser- vices, frequency regulation, voltage regulation

Huang, Jianwei

22

Frequency Regulation from Flexible Loads: Potential, Economics, and Implementation  

E-Print Network [OSTI]

potential for providing regulation reserve to the grid. This paper aims to provide a foundation in communications, and dynamics modeling errors. I. INTRODUCTION In the electrical power grid, balance between) allow non-generator resources with limited energy capacities, such as batteries and flywheels

Sanandaji, Borhan M.

23

Memantine improves spatial learning and memory impairments by regulating NGF signaling in APP/PS1 transgenic mice  

Science Journals Connector (OSTI)

Abstract Memantine (MEM) is used for improving the cognitive impairments of the patients suffering from Alzheimer’s disease (AD) by multiple neuroprotective mechanisms. However, it is still not clear whether nerve growth factor (NGF) signaling is involved in the mechanisms of MEM. The present study investigated the neuroprotective effects of MEM treatment on the cognitive performance and amyloidosis in APP/PS1 transgenic mice, and disclosed the NGF-related mechanism of MEM. We found that MEM treatment improved the cognitive performance by decreasing the escape latency and path length in the navigation test, by shortening the duration in target quadrant and reducing the frequency to pass through the target in probe trial, and by prolonging the latency and decreasing the frequencies of entering the dark compartment in passive avoidance test. The over-expressions of A?(1–42) and amyloid precursor protein (APP) were also decreased in the brains of APP/PS1 mice. Interestingly, MEM treatment improved the decreased NGF levels in APP/PS1 mice. Furthermore, NGF/TrkA signaling was activated by increasing the phosphorylation levels of tyrosine kinase (TrkA), proto-oncogene serine/threonine-protein kinase, Raf1 (c-Raf), extracellular regulated protein kinases (ERK)1/2 and cAMP-response element binding protein (CREB) after MEM treatment. Simultaneously, MEM also inhibited NGF/p75NTR signaling via decreasing the cleavage substrate of p75NTR, increasing the JNK2 phosphorylation and decreasing the levels of p53 and cleaved-caspase 3. Therefore, the dual-regulation on NGF signaling was attributed to the improvements of cognitive deficits and A? depositions in APP/PS1 mice. In conclusion, MEM treatment activated the NGF/TrkA signaling, and inhibited the p75NTR signaling in APP/PS1 mice to ameliorate the behavioral deficits and amyloidosis, indicating that NGF signaling was a new potential target of MEM treatment for AD therapy.

M.Y. Liu; S. Wang; W.F. Yao; Z.J. Zhang; X. Zhong; L. Sha; M. He; Z.H. Zheng; M.J. Wei

2014-01-01T23:59:59.000Z

24

Using Multiple Beams to Distinguish Radio Frequency Interference from SETI Signals  

E-Print Network [OSTI]

Using Multiple Beams to Distinguish Radio Frequency Interference from SETI Signals G. R. Harp Allen for extra-terrestrial intelligence) observations. It is a multi-beam instrument, with 16 independently steerable dual- polarization beams at 4 different tunings. Given 4 beams at one tuning, it is possible

Ellingson, Steven W.

25

STATCOM-based voltage and frequency regulator for stand-alone asynchronous generator  

Science Journals Connector (OSTI)

This paper presents a STATCOM-based voltage and frequency regulation for stand-alone asynchronous generator feeding linear and nonlinear loads. The SEIG have inherent poor voltage and frequency regulation. The voltage and frequency depend upon the load current and power factor of the load with fixed excitation capacitor employing unregulated turbines. The changing consumer load requires variable reactive power compensation for excitation requirement. Consumer load contains harmonics and performance of SEIG is largely affected by these load harmonics. A current controlled voltage source inverter working as STATCOM is used for harmonic elimination, load balancing and variable reactive power compensation. A DC chopper with dump load is connected across DC bus capacitor to regulate varying consumer load. The control algorithm has been first co-simulated with processor in the loop (PIL) and then experimentally validated. The transient behaviour of developed prototype system for application and removal of balanced, unbalanced, nonlinear load is investigated.

Dheeraj Kumar Palwalia

2014-01-01T23:59:59.000Z

26

Wavelet based Neuro-Detector for low frequencies of vibration signals in electric motors  

Science Journals Connector (OSTI)

This study presents a Wavelet based Neuro-Detector approach employed to detect the aging indications of an electric motor. Analysis of the aging indications, which can be seen in the low frequency region, is performed using vibration signals. More specifically, two vibration signals are observed for healthy and faulty (aged) cases which are measured from the same electric motor. Multi Resolution Wavelet Analysis (MRWA) is applied in order to obtain low and high frequency bands of the vibration signals. Thus for detecting the aging properties in the spectra, the Power Spectral Density (PSD) of the subband for the healthy case is used to train an Auto Associative Neural Network (AANN). The PSD amplitudes, which are computed for the faulty case, are applied to input nodes of the trained network for the re-calling process of AANN. Consequently, the simulation results show that some spectral properties defined in low frequency region are determined through the error response of AANN. Hence, some specific frequencies of the bearing damage related to the aging process are detected and identified.

Duygu Bayram; Serhat ?eker

2013-01-01T23:59:59.000Z

27

Regulation of the p38 MAPK Signaling Pathway by the Circadian Clock  

E-Print Network [OSTI]

to more complex organisms. The OS-2 MAPK pathway in the filamentous fungus Neurospora is rhythmically activated by the circadian clock. In order to generate this rhythmic signal, the circadian oscillator directly regulates the rhythmic transcription...

Goldsmith, Charles Sidney

2013-08-12T23:59:59.000Z

28

Influence of frequency scanning on the operation of pulsed lasers with external signal injection  

SciTech Connect (OSTI)

An analysis is made of the influence of variation of the detuning of the frequency of a resonator mode from that of an external injected signal on the operation of pulsed gas lasers. It is found when the detuning is varied with time there is an increase in the width of the locking region of a resonator mode in pulsed lasers. The results are given of numerical calculations of the dependences of the locking efficiency on the parameters on the injected signal and of the laser active medium.

Gapotchenko, N.I.; Likhanskii, V.V.; Napartovich, A.P.

1985-10-01T23:59:59.000Z

29

Mechanical regulation of signaling pathways in bone, William R. Thompson a,  

E-Print Network [OSTI]

Review Mechanical regulation of signaling pathways in bone, William R. Thompson a, , Clinton T A wide range of cell types depend on mechanically induced signals to enable appropriate physiological re- sponses. The skeleton is particularly dependent on mechanical information to guide the resident cell

30

The VLSI design of the minimal dimension, cost and power consumption system for time-frequency signal analysis  

Science Journals Connector (OSTI)

Multiple clock cycle implementation (MCI) of a flexible system for time-frequency (TF) signal analysis is presented. Some very important and frequently used time-frequency distributions (TFDs) can be realized by using the proposed architecture: the spectrogram ... Keywords: FPGA devices, S-method, hardware realization, multiple clock cycle implementation, time-frequency analysis

Veselin N. Ivanovi?; Radovan Stojanovi?

2005-08-01T23:59:59.000Z

31

Lifetime Optimization of Multi-hop Wireless Sensor Networks by Regulating the Frequency of Use of  

E-Print Network [OSTI]

of Cooperative Transmission Jin Woo Jung and Mary Ann Ingram School of Electrical and Computer EngineeringLifetime Optimization of Multi-hop Wireless Sensor Networks by Regulating the Frequency of Use model, we show how Cooperative Transmission (CT), when it is used to extend the communication range, can

Ingram, Mary Ann

32

Post-transcriptional regulation of ethylene perception and signaling in Arabidopsis  

SciTech Connect (OSTI)

The simple gas ethylene functions as an endogenous regulator of plant growth and development, and modulates such energy relevant processes as photosynthesis and biomass accumulation. Ethylene is perceived in the plant Arabidopsis by a five-member family of receptors related to bacterial histidine kinases. Our data support a general model in which the receptors exist as parts of larger protein complexes. Our goals have been to (1) characterize physical interactions among members of the signaling complex; (2) the role of histidine-kinase transphosphorylation in signaling by the complex; and (3) the role of a novel family of proteins that regulate signal output by the receptors.

Schaller, George Eric

2014-03-19T23:59:59.000Z

33

Cell type dependent radiation induced signaling and its effect on tissue regulation  

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

Cell type dependent radiation induced signaling and its effect on tissue regulation Cell type dependent radiation induced signaling and its effect on tissue regulation Marianne B. Sowa, Claere von Neubeck, R. Joe Robinson, Paula M. Koehler, Norman J. Karin, Xihai Wang, Katrina M. Waters and Harish Shankaran Ionizing radiation exposure triggers a cell signaling program which includes proliferation, the DNA damage response, and tissue remodeling. The activated signaling pathways lead to the induction of both protective effects as well as adverse consequences. A fundamental question is whether signaling cascades initiated by low doses are fundamentally different than those initiated by high doses. To address this question we have applied a systems biology approach to examine the radiation induced temporal responses of an in vitro three dimensional (3D) human skin tissue model. Using microarray-

34

Chapter 4 - Regulators of G Protein Signaling Proteins as Targets for Drug Discovery  

Science Journals Connector (OSTI)

Signaling via G-protein-coupled receptors (GPCRs) is central for the function of biological systems. Many clinically used drugs target \\{GPCRs\\} directly or target molecules involved in GPCR signaling. As an alternative to targeting receptors directly, one could modulate signaling cascades downstream of receptor activation. In recent years, there has been substantial interest in a family of proteins called regulators of G protein signaling (RGS) proteins. They modulate GPCR signaling by accelerating GTP hydrolysis on active G? subunits, thereby reducing the amplitude and duration of signaling. Modulating RGS activity would be a useful strategy to control GPCR signaling. An RGS inhibitor would be expected to enhance GPCR signaling and could do so in a tissue- or pathway-specific manner. Apart from the central GAP (GTPase accelerating protein) activity, many RGS proteins also have other functions like regulating protein–protein interactions, subcellular localization of signaling molecules, and protein translation. It is clear that these proteins serve important functions in a number of physiological and pathophysiological processes, and they are emerging as potential drug targets. This chapter gives an overview of what is currently known about biological functions of RGS proteins based on in vivo and in vitro data. We also summarize the current status in targeting RGS proteins in drug discovery.

Benita Sjögren; Levi L. Blazer; Richard R. Neubig

2010-01-01T23:59:59.000Z

35

Cooperative Ethylene and Jasmonic Acid Signaling Regulates Selenite Resistance in Arabidopsis1[W][OA  

E-Print Network [OSTI]

Cooperative Ethylene and Jasmonic Acid Signaling Regulates Selenite Resistance in Arabidopsis1[W-induced increases in mRNA levels of ethylene- or jasmonic acid (JA)-biosynthesis and -inducible genes in Col-0 than in Ws-2. Indeed, Col-0 exhibited higher levels of ethylene and JA. The selenite-sensitive phenotype

36

Mechanical Loading Regulates NFATc1 and -Catenin Signaling through a GSK3 Control Node*  

E-Print Network [OSTI]

Mechanical Loading Regulates NFATc1 and -Catenin Signaling through a GSK3 Control Node* Received at Stony Brook, Stony Brook, New York 11794 Mechanical stimulation can prevent adipogenic and im- prove of -catenin levels. We asked whether mechanical up-regula- tion of -catenin was critical to reduction

37

Regulation of signal duration and the statistical dynamics of kinase activation by scaffold proteins  

E-Print Network [OSTI]

Scaffolding proteins that direct the assembly of multiple kinases into a spatially localized signaling complex are often essential for the maintenance of an appropriate biological response. Although scaffolds are widely believed to have dramatic effects on the dynamics of signal propagation, the mechanisms that underlie these consequences are not well understood. Here, Monte Carlo simulations of a model kinase cascade are used to investigate how the temporal characteristics of signaling cascades can be influenced by the presence of scaffold proteins. Specifically, we examine the effects of spatially localizing kinase components on a scaffold on signaling dynamics. The simulations indicate that a major effect that scaffolds exert on the dynamics of cell signaling is to control how the activation of protein kinases is distributed over time. Scaffolds can influence the timing of kinase activation by allowing for kinases to become activated over a broad range of times, thus allowing for signaling at both early and late times. Scaffold concentrations that result in optimal signal amplitude also result in the broadest distributions of times over which kinases are activated. These calculations provide insights into one mechanism that describes how the duration of a signal can potentially be regulated in a scaffold mediated protein kinase cascade. Our results illustrate another complexity in the broad array of control properties that emerge from the physical effects of spatially localizing components of kinase cascades on scaffold proteins.

Jason W. Locasale; Arup K. Chakraborty

2008-07-13T23:59:59.000Z

38

A Task-level Model for Optomotor Yaw Regulation in Drosophila Melanogaster: A Frequency-Domain System Identification Approach  

E-Print Network [OSTI]

-level locomotor behavior to a single-input­single-output system [4]­[6]. Optomotor yaw regulation has been studiedA Task-level Model for Optomotor Yaw Regulation in Drosophila Melanogaster: A Frequency-Domain System Identification Approach Eatai Roth1, Michael B. Reiser2, Michael H. Dickinson3, and Noah J. Cowan1

39

Procyanidin dimer B2-mediated IRAK-M induction negatively regulates TLR4 signaling in macrophages  

SciTech Connect (OSTI)

Highlights: •Pro B2 elevated the expression of IRAK-M, a negative regulator of TLR signaling. •LPS-induced expression of cell surface molecules was inhibited by Pro B2. •LPS-induced production of pro-inflammatory cytokines was inhibited by Pro B2. •Pro B2 inhibited LPS-induced activation of MAPKs and NF-?B through IRAK-M. •Pro B2 inactivated naïve T cells by inhibiting LPS-induced cytokines via IRAK-M. -- Abstract: Polyphenolic compounds have been found to possess a wide range of physiological activities that may contribute to their beneficial effects against inflammation-related diseases; however, the molecular mechanisms underlying this anti-inflammatory activity are not completely characterized, and many features remain to be elucidated. In this study, we investigated the molecular basis for the down-regulation of toll-like receptor 4 (TLR4) signal transduction by procyanidin dimer B2 (Pro B2) in macrophages. Pro B2 markedly elevated the expression of the interleukin (IL)-1 receptor-associated kinase (IRAK)-M protein, a negative regulator of TLR signaling. Lipopolysaccharide (LPS)-induced expression of cell surface molecules (CD80, CD86, and MHC class I/II) and production of pro-inflammatory cytokines (tumor necrosis factor-?, IL-1?, IL-6, and IL-12p70) were inhibited by Pro B2, and this action was prevented by IRAK-M silencing. In addition, Pro B2-treated macrophages inhibited LPS-induced activation of mitogen-activated protein kinases such as extracellular signal-regulated kinase 1/2, p38, and c-Jun N-terminal kinase and the translocation of nuclear factor ?B and p65 through IRAK-M. We also found that Pro B2-treated macrophages inactivated naïve T cells by inhibiting LPS-induced interferon-? and IL-2 secretion through IRAK-M. These novel findings provide new insights into the understanding of negative regulatory mechanisms of the TLR4 signaling pathway and the immune-pharmacological role of Pro B2 in the immune response against the development and progression of many chronic diseases.

Sung, Nak-Yun [Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185 (Korea, Republic of)] [Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185 (Korea, Republic of); Yang, Mi-So [Department of Microbiology, Infection Signaling Network Research Center, College of Medicine, Chungnam National University, Daejeon (Korea, Republic of)] [Department of Microbiology, Infection Signaling Network Research Center, College of Medicine, Chungnam National University, Daejeon (Korea, Republic of); Song, Du-Sub [Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185 (Korea, Republic of) [Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185 (Korea, Republic of); School of life sciences and Biotechnology, Korea University 5-ka, Anam-Dong, Sungbuk-ku, Seoul 136-701 (Korea, Republic of); Kim, Jae-Kyung; Park, Jong-Heum; Song, Beom-Seok; Park, Sang-Hyun; Lee, Ju-Woon [Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185 (Korea, Republic of)] [Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185 (Korea, Republic of); Park, Hyun-Jin [School of life sciences and Biotechnology, Korea University 5-ka, Anam-Dong, Sungbuk-ku, Seoul 136-701 (Korea, Republic of)] [School of life sciences and Biotechnology, Korea University 5-ka, Anam-Dong, Sungbuk-ku, Seoul 136-701 (Korea, Republic of); Kim, Jae-Hun [Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185 (Korea, Republic of)] [Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185 (Korea, Republic of); Byun, Eui-Baek, E-mail: ebbyun80@kaeri.re.kr [Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185 (Korea, Republic of)] [Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 580-185 (Korea, Republic of); Byun, Eui-Hong, E-mail: ehbyun80@kongju.ac.k [Department of Food Science and Technology, Kongju National University, Yesan 340-800 (Korea, Republic of)] [Department of Food Science and Technology, Kongju National University, Yesan 340-800 (Korea, Republic of)

2013-08-16T23:59:59.000Z

40

CTGF Mediates Smad-Dependent Transforming Growth Factor ? Signaling To Regulate Mesenchymal Cell Proliferation during Palate Development  

Science Journals Connector (OSTI)

...shelf or the palate at newborn stage. Abbreviations: M, maxillary bone; NB, newborn; P, palatine bone; PM, premaxilla; pppl, palatal process of the palatine; ps, presphenoid. Previous studies have shown that TGF-beta signaling is crucial for regulating...

Carolina Parada; Jingyuan Li; Junichi Iwata; Akiko Suzuki; Yang Chai

2013-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Two observations about low-frequency signals on accelerograms from the October 15, 1979 Imperial Valley, California earthquake  

SciTech Connect (OSTI)

Accelerograms from the Imperial Valley have been integrated and baseline corrected by a simple procedure which keeps track of the signal that is removed at long periods. Specifically, acceleration is integrated once to obtain velocity, a linear baseline is subtracted from velocity, the velocity is integrated to displacement, and low order terms of a trigonometric expansion of displacement are subtracted. It is observed that even though this procedure is not suitable for routine processing, one obtains displacement traces which usually resemble the results obtained by standar methods. It is also observed that amplitudes of the trigonometric series expansions are consistent with a simple earthquake source theory for frequencies greater than 1/12 Hz, suggesting that the records are dominated by signal at those frequencies.

Anderson, J.G.

1985-01-01T23:59:59.000Z

42

10 - Regulator of G Protein Signaling Proteins as Drug Targets: Current State and Future Possibilities  

Science Journals Connector (OSTI)

Abstract Regulators of G protein signaling (RGS) proteins have emerged in the past two decades as novel drug targets in many areas of research. Their importance in regulating signaling via G protein-coupled receptors has become evident as numerous studies have been published on the structure and function of RGS proteins. A number of genetic models have also been developed, demonstrating the potential clinical importance of RGS proteins in various disease states, including central nervous system disorders, cardiovascular disease, diabetes, and several types of cancer. Apart from their classical mechanism of action as GTPase-activating proteins (GAPs), RGS proteins can also serve other noncanonical functions. This opens up a new approach to targeting RGS proteins in drug discovery as the view on the function of these proteins is constantly evolving. This chapter summarizes the latest development in RGS protein drug discovery with special emphasis on noncanonical functions and regulatory mechanisms of RGS protein expression. As more reports are being published on this group of proteins, it is becoming clear that modulation of GAP activity might not be the only way to therapeutically target RGS proteins.

Benita Sjögren

2011-01-01T23:59:59.000Z

43

Coordinated Control and Optimization of Virtual Power Plants for Energy and Frequency Regulation Services in Electricity Markets  

E-Print Network [OSTI]

and bidding strategy for VPPs to provide energy balancing and grid frequency regulation services in electricity market environment. In this thesis, the VPP consists of two energy conversion assets: a Doubly Fed Induction Generator (DFIG)-based wind farm and a...

Zhang, Fan

2012-02-14T23:59:59.000Z

44

A Test of Vehicle-to-Grid (V2G) for Energy Storage and Frequency Regulation in the PJM  

E-Print Network [OSTI]

of Vehicle-to-Grid power, providing real-time frequency regulation from an electric car. Vehicle-to-Grid (V2G) presents a mechanism to meet key requirements of the electric power system, using electric vehicles when, freeway-capable electric vehicle was used in this study. Its power electronics are designed to both drive

Firestone, Jeremy

45

Reciprocal regulation of extracellular signal regulated kinase 1/2 and mitogen activated protein kinase phosphatase-3  

SciTech Connect (OSTI)

Mitogen activated protein kinase phosphatase-3 (MKP-3) is a putative tumor suppressor. When transiently overexpressed, MKP-3 dephosphorylates and inactivates extracellular signal regulated kinase (ERK) 1/2. Little is known about the roles of endogenous MKP-3, however. We previously showed that MKP-3 is upregulated in cell lines that express oncogenic Ras. Here we tested the roles of endogenous MKP-3 in modulating ERK1/2 under conditions of chronic stimulation of the Ras/Raf/MEK1/2/ERK1/2 pathway by expression of oncogenic Ras. We used two cell lines: H-ras MCF10A, breast epithelial cells engineered to express H-Ras, and DLD-1, colon cancer cells that express endogenous Ki-Ras. First, we found that MKP-3 acts in a negative feedback loop to suppress basal ERK1/2 when oncogenic Ras stimulates the Ras/Raf/MEK1/2/ERK1/2 cascade. ERK1/2 was required to maintain elevated MKP-3, indicative of a negative feedback loop. Accordingly, knockdown of MKP-3, via siRNA, increased ERK1/2 phosphorylation. Second, by using siRNA, we found that MKP-3 helps establish the sensitivity of ERK1/2 to extracellular activators by limiting the duration of ERK1/2 phosphorylation. Third, we found that the regulation of ERK1/2 by MKP-3 is countered by the complex regulation of MKP-3 by ERK1/2. Potent ERK1/2 activators stimulated the loss of MKP-3 within 30 min due to an ERK1/2-dependent decrease in MKP-3 protein stability. MKP-3 levels recovered within 120 min due to ERK1/2-dependent resynthesis. Preventing MKP-3 resynthesis, via siRNA, prolonged ERK1/2 phosphorylation. Altogether, these results suggest that under the pressure of oncogenic Ras expression, MKP-3 reins in ERK1/2 by serving in ERK1/2-dependent negative feedback pathways.

Zeliadt, Nicholette A. [Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Mayo Mail Code 807, 420 Delaware Street SE, Minneapolis, MN 55455 (United States); Mauro, Laura J. [Department of Animal Science-Physiology, University of Minnesota, St. Paul, MN 55108 (United States); Wattenberg, Elizabeth V. [Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Mayo Mail Code 807, 420 Delaware Street SE, Minneapolis, MN 55455 (United States)], E-mail: watte004@umn.edu

2008-11-01T23:59:59.000Z

46

Current mode integrators and their applications in low-voltage high frequency CMOS signal processing  

E-Print Network [OSTI]

Low voltage CMOS fully differential integrators for high frequency continuous-time filters using current-mode techniques are presented.. Current mode techniques are employed to avoid the use of the floating differential pair, in order to achieve...

Smith, Sterling Lane

2012-06-07T23:59:59.000Z

47

Relationship between cutoff frequency and accuracy in time-interval photon statistics applied to oscillating signals  

Science Journals Connector (OSTI)

In this paper the accuracy in the determination of the period of an oscillating signal, when obtained from the photon statistics time-interval probability, is studied as a function of...

Rebolledo, M A; Martinez-Betorz, J A

1989-01-01T23:59:59.000Z

48

Molecular Mimicry Regulates ABA Signaling by SnRK2 Kinases and PP2C Phosphatases  

SciTech Connect (OSTI)

Abscisic acid (ABA) is an essential hormone for plants to survive environmental stresses. At the center of the ABA signaling network is a subfamily of type 2C protein phosphatases (PP2Cs), which form exclusive interactions with ABA receptors and subfamily 2 Snfl-related kinase (SnRK2s). Here, we report a SnRK2-PP2C complex structure, which reveals marked similarity in PP2C recognition by SnRK2 and ABA receptors. In the complex, the kinase activation loop docks into the active site of PP2C, while the conserved ABA-sensing tryptophan of PP2C inserts into the kinase catalytic cleft, thus mimicking receptor-PP2C interactions. These structural results provide a simple mechanism that directly couples ABA binding to SnRK2 kinase activation and highlight a new paradigm of kinase-phosphatase regulation through mutual packing of their catalytic sites.

Soon, Fen-Fen; Ng, Ley-Moy; Zhou, X. Edward; West, Graham M.; Kovach, Amanda; Tan, M.H. Eileen; Suino-Powell, Kelly M.; He, Yuanzheng; Xu, Yong; Chalmers, Michael J.; Brunzelle, Joseph S.; Zhang, Huiming; Yang, Huaiyu; Jiang, Hualiang; Li, Jun; Yong, Eu-Leong; Cutler, Sean; Zhu, Jian-Kang; Griffin, Patrick R.; Melcher, Karsten; Xu, H. Eric (Van Andel); (Scripps); (NWU); (Purdue); (UCR); (Chinese Aca. Sci.); (NU Singapore)

2014-10-02T23:59:59.000Z

49

TrkB-T1 regulates the RhoA signaling and actin cytoskeleton in glioma cells  

SciTech Connect (OSTI)

Recently, the truncated TrkB receptor, T1, has been reported to be involved in the control of cell morphology via the regulation of Rho proteins, through which T1 binds Rho guanine nucleotide dissociation inhibitor (Rho GDI) 1 and dissociates it in a brain-derived neurotrophic factor (BDNF)-dependent manner. However, it is unclear whether T1 signaling regulates the downstream of Rho signaling and the actin cytoskeleton. In this study, we investigated this question using C6 rat glioma cells, which express T1 endogenously. Rho GDI1 was dissociated from T1 in a BDNF-dependent manner, which also causes decreases in the activities of Rho-signaling molecules such as RhoA, Rho-associated kinase, p21-activated kinase, and extracellular-signal regulated kinase1/2. Moreover, BDNF treatment resulted in the disappearance of stress fibers in the cells treated with lysophosphatidic acid, an activator of RhoA, and in morphological changes in cells. Furthermore, a competitive assay with cyan fluorescent protein fusion proteins of T1-specific sequences reduced the effects of BDNF. These results suggest that T1 regulates the Rho-signaling pathways and the actin cytoskeleton.

Ohira, Koji [Department of Cellular and Molecular Biology, Primate Research Institute, Kyoto University, Aichi (Japan); Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo (Japan); Homma, Koichi J. [Department of Molecular Pathology, Faculty of Pharmaceutical Sciences, Teikyo University, Kanagawa (Japan); Hirai, Hirohisa [Department of Cellular and Molecular Biology, Primate Research Institute, Kyoto University, Aichi (Japan); Nakamura, Shun [Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo (Japan); Hayashi, Motoharu [Department of Cellular and Molecular Biology, Primate Research Institute, Kyoto University, Aichi (Japan)]. E-mail: hayashi@pri.kyoto-u.ac.jp

2006-04-14T23:59:59.000Z

50

Stable transmission of radio frequency signals on fiber links using interferomectric delay sensing  

SciTech Connect (OSTI)

The authors demonstrate distribution of a 2850 MHz rf signal over stabilized optical fiber links. For a 2.2 km link they measure an rms drift of 19.4 fs over 60 h, and for a 200 m link an rms drift of 8.4 fs over 20 h. The rf signals are transmitted as amplitude modulation on a continuous optical carrier. Variations in the delay length are sensed using heterodyne interferometry and used to correct the rf phase. The system uses standard fiber telecommunications components.

Wilcox, Russell B.; Byrd, J.M.; Doolittle, Lawrence; Huang, Gang; Staples, J.W.

2009-07-29T23:59:59.000Z

51

Genome-scale RNAi on living-cell microarrays identifies novel regulators of Drosophila melanogaster TORC1–S6K pathway signaling  

E-Print Network [OSTI]

The evolutionarily conserved target of rapamycin complex 1 (TORC1) controls cell growth in response to nutrient availability and growth factors. TORC1 signaling is hyperactive in cancer, and regulators of TORC1 signaling ...

Lindquist, Robert A.

52

Quality factor tuning of high-frequency high-Q filter biquads using adaptive signal processing  

E-Print Network [OSTI]

A quality factor (Q) tuning technique for high-frequency and high-Q continuous-time filter biquads is proposed. The method is based on the existing magnitude locked loop Q-tuning technique, but it utilizes the continuous-time adaptive LMS algorithm...

Stevenson, Jan-Michael

2012-06-07T23:59:59.000Z

53

Dependence of radar signal strength on frequency and aspect angle of nonspecular meteor trails  

E-Print Network [OSTI]

's atmosphere, it forms a high-density ionized plasma column immersed in the ionosphere between approximately 70 is an HPLA radar operating simultaneously at 160 MHz and 422 MHz on the Kwajalein Atoll. First, we and the background magnetic field increases, the signal strength falls off 3 to 4 dB per degree at 160 MHz

Oppenheim, Meers

54

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: FUNDAMENTAL THEORY AND APPLICATIONS, VOL. 50, NO. 8, AUGUST 2003 1103 Small-Signal Analysis of Frequency-Controlled  

E-Print Network [OSTI]

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: FUNDAMENTAL THEORY AND APPLICATIONS, VOL. 50, NO. 8, AUGUST 2003 1103 Small-Signal Analysis of Frequency-Controlled Electronic Ballasts Yan Yin, Student of frequency-controlled dimming electronic ballasts. A modified phasor transformation is proposed that converts

55

Improved Battery Models of an Aggregation of Thermostatically Controlled Loads for Frequency Regulation  

E-Print Network [OSTI]

Integration and Regulating Reserve Service Vast and deep integration of renewable energy resources into the existing power grid is essential in achieving the envi- sioned sustainable energy future. Environmental, stochasticity, and intermittency characteristics of renewable energies, however, present challenges

Sanandaji, Borhan M.

56

Modeling of GE Appliances: Cost Benefit Study of Smart Appliances in Wholesale Energy, Frequency Regulation, and Spinning Reserve Markets  

SciTech Connect (OSTI)

This report is the second in a series of three reports describing the potential of GE’s DR-enabled appliances to provide benefits to the utility grid. The first report described the modeling methodology used to represent the GE appliances in the GridLAB-D simulation environment and the estimated potential for peak demand reduction at various deployment levels. The third report will explore the technical capability of aggregated group actions to positively impact grid stability, including frequency and voltage regulation and spinning reserves, and the impacts on distribution feeder voltage regulation, including mitigation of fluctuations caused by high penetration of photovoltaic distributed generation. In this report, a series of analytical methods were presented to estimate the potential cost benefit of smart appliances while utilizing demand response. Previous work estimated the potential technical benefit (i.e., peak reduction) of smart appliances, while this report focuses on the monetary value of that participation. The effects on wholesale energy cost and possible additional revenue available by participating in frequency regulation and spinning reserve markets were explored.

Fuller, Jason C.; Parker, Graham B.

2012-12-31T23:59:59.000Z

57

STATCOM based voltage-frequency regulation for SEIG driven by an uncontrolled speed turbine  

Science Journals Connector (OSTI)

This article presents the analysis and the control of a stand-alone self excited induction generator (SEIG) intended for rural applications. SEIG along with the STATCOM with battery energy storage (BES) in its DC side makes it possible to control the terminal voltage and frequency during rotor speed and load variation. Constant frequency control is carried out by the load angle '?', without rotor speed control, while constant terminal voltage control is achieved via the modulation index 'm'. The 'SEIG' magnetisation characteristic and the 'STATCOM' rating are taken into consideration to determine the load interval where the terminal voltage and frequency can be controlled. The simulation results show good performances of the SEIG-STATCOM system under different perturbations.

Azzeddine Benlamoudi; Rachid Abdessemed

2009-01-01T23:59:59.000Z

58

Cytokinin Regulation of Auxin Synthesis in Arabidopsis Involves a Homeostatic Feedback Loop Regulated via Auxin and Cytokinin Signal Transduction  

Science Journals Connector (OSTI)

...key regulators of critical processes, such as organogenesis...the hormones are similarly interrelated in rapidly growing tissues...plant growth and developmental processes, it is clear from the data...and environmental response processes. We propose a model for auxin...

Brian Jones; Sara Andersson GunnerÄs; Sara V. Petersson; Petr Tarkowski; Neil Graham; Sean May; Karel Dolezal; Göran Sandberg; Karin Ljung

2010-09-07T23:59:59.000Z

59

An Off-Chip Capacitor Free Low Dropout Regulator with PSR Enhancement at Higher Frequencies  

E-Print Network [OSTI]

closer to open loop?s unity-gain frequency. The stability and PSR are totally valid even for load capacitor varying from 0 to 100 pF. The proposed capacitor-less LDO is fabricated in On-Semi 0.5 ?m fully CMOS process. Experimental results confirm a PSR...

Gopalraju, Seenu

2012-02-14T23:59:59.000Z

60

Grid regulation services for energy storage devices based on grid frequency  

DOE Patents [OSTI]

Disclosed herein are representative embodiments of methods, apparatus, and systems for charging and discharging an energy storage device connected to an electrical power distribution system. In one exemplary embodiment, a controller monitors electrical characteristics of an electrical power distribution system and provides an output to a bi-directional charger causing the charger to charge or discharge an energy storage device (e.g., a battery in a plug-in hybrid electric vehicle (PHEV)). The controller can help stabilize the electrical power distribution system by increasing the charging rate when there is excess power in the electrical power distribution system (e.g., when the frequency of an AC power grid exceeds an average value), or by discharging power from the energy storage device to stabilize the grid when there is a shortage of power in the electrical power distribution system (e.g., when the frequency of an AC power grid is below an average value).

Pratt, Richard M; Hammerstrom, Donald J; Kintner-Meyer, Michael C.W.; Tuffner, Francis K

2014-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

The Regulation of Growth Factor Signaling in Drosophila Development and Disease  

E-Print Network [OSTI]

FIGURE Page 1.1 Neuroblast specification in the Drosophila central nervous system .??..??5 1.2 Asymmetric neural stem cell division in Drosophila ??????????.7 1.3 Reactivation of quiescent neural stem cells...??.?????.?58 2.3 Hh and Bnl signaling affect TNb proliferation ??????????.??61 2.4 Hh and Bnl signaling occurs in cells adjacent to thoracic neuroblasts ?...?..63 2.5 Trol modulates Hh and Bnl signaling in the ventral ganglion...

Lindner, Jonathan Ryan

2012-02-14T23:59:59.000Z

62

Estradiol-Induced Object Memory Consolidation in Middle-Aged Female Mice Requires Dorsal Hippocampal Extracellular Signal-Regulated Kinase and Phosphatidylinositol 3-Kinase Activation  

E-Print Network [OSTI]

We previously demonstrated that dorsal hippocampal extracellular signal-regulated kinase (ERK) activation is necessary for 17?[beta]-estradiol (E2[E subscript 2]) to enhance novel object recognition in young ovariectomized ...

Lewis, Michael C.

63

Regulation of horizontal gene transfer by intercellular peptide signaling in Bacillus subtilis  

E-Print Network [OSTI]

Horizontal gene transfer plays an important role in bacterial evolution. Although acquisition of foreign DNA can be beneficial to cells, it can also be detrimental. Therefore, cells that possess mechanisms to regulate ...

Auchtung, Jennifer M

2006-01-01T23:59:59.000Z

64

Regulation and function of the Rho GTPase mediated signaling pathways in metastasis and lenticular differentiation  

E-Print Network [OSTI]

effector, SRF, have been shown to be key regulators in lens cell differentiation, possibly leading to lens opacification via its transcriptional control of the structural crystallins within the lens. The results of this dissertation research have made...

Mitchell, Dianne Courtenay

2007-09-17T23:59:59.000Z

65

ATP Release and Signaling via P2Y Receptors Regulate Cardiac Fibroblast Phenotype and Activity  

E-Print Network [OSTI]

I. (2010) Extracellular ATP is a danger signal activatingA. , and Junger, W. G. (2006) ATP release guides neutrophilH. S. (2012) Cardiomyocyte ATP release through pannexin 1

Lu, David

66

Regulation of Hoxb4 induction after neurulation by somite signal and neural competence  

Science Journals Connector (OSTI)

Hoxb4 gene expression is induced after neural tube formation in the chick, demonstrating later CNS refinement by both dorsal-ventral patterning systems from somites adjacent to the neural tube and anterior-posterior signals.

Gayana S Amirthalingam; Sara Howard; Susana Alvarez; Angel R de Lera; Nobue Itasaki

2009-02-25T23:59:59.000Z

67

Coordinated control for large-scale EV charging facilities and energy storage devices participating in frequency regulation  

Science Journals Connector (OSTI)

Abstract With the increasing penetration of renewable energy, automatic generation control (AGC) capacity requirements will increase dramatically, becoming a challenging task that must be addressed. The rapid growth of electric vehicles (EVs) provides new approaches for the stable operation of power systems. Vehicle-to-grid (V2G) technology has the potential to provide frequency regulation (FR) services. Fully taking into account the advantages of \\{EVs\\} and battery energy storage stations (BESSs), i.e. rapid response and large instantaneous power, this paper presents a coordinated control strategy for large-scale EVs, \\{BESSs\\} and traditional FR resources involved in AGC. Response priorities and control strategies for the FR resources vary with different operating states. To verify the effectiveness of the proposed control strategy, dynamic simulations for EV/BESS to participate in AGC of a two-area interconnected power system are performed in the Matlab/Simulink program. The simulation results show that the proposed method can not only fully utilize the advantages of EV/BESS, but also achieve the coordination among different FR resources, thus improving the frequency stability and facilitating the integration of renewable energy.

Jin Zhong; Lina He; Canbing Li; Yijia Cao; Jianhui Wang; Baling Fang; Long Zeng; Guoxuan Xiao

2014-01-01T23:59:59.000Z

68

Effect on the condition of the metal in A K-300-3.5 turbine owing to multicycle fatigue from participation of a power generating unit in grid frequency and power regulation  

SciTech Connect (OSTI)

The effect on the condition of the rotor material owing to multicycle fatigue caused by variable stresses during participation of a power generating unit in grid frequency and power regulation is evaluated using the K-300-23.5 steam turbine as an example. It is shown that during normalized primary frequency regulation the safety factor is at least 50, while during automatic secondary regulation of frequency and power there is essentially no damage to the metal.

Lebedeva, A. I.; Zorchenko, N. V.; Prudnikov, A. A.

2011-09-15T23:59:59.000Z

69

Localization of Antarctic ice breaking events by frequency dispersion of the signals received at a single hydroacoustic station in the Indian Ocean  

Science Journals Connector (OSTI)

Transient acoustic signals from Antarctic icecracking and breaking events featuring significant frequency dispersion were observed at the hydroacoustic stations deployed in the Indian Ocean as part of the International Monitoring System(IMS) of the Comprehensive Nuclear?Test?Ban Treaty. Based on a comparison with numerical predictions the measured dispersion characteristics were used to estimate the range between ice events and the receiver. Combined with the bearing capability of the IMS stations these estimates allow us to locate ice events from a single hydroacoustic station. An analysis of range estimation errors due to uncertainty of the measured time?frequency structure of signal arrivals and due to variations of the sound speed profiles was also conducted. The analysis showed that the location accuracy from a single hydroacoustic station for the typical ice events was of the same order as that determined from an intersection of bearings from two remote stations if the signal frequency bandwidth is as wide as at least 5 Hz and lies within 5 Hz to 35 Hz frequency range. This localization method was examined by analysing several ice events detected at both the Cape Leeuwin IMS station and a sea noise logger deployed off the Antarctic shelf.

Binghui Li; Alexander Gavrilov

2008-01-01T23:59:59.000Z

70

mTOR Signaling Regulates Nucleolar Targeting of the SUMO-Specific Isopeptidase SENP3  

Science Journals Connector (OSTI)

...A central question is how changes in energy supply feed into the regulation of ribosome...maturation in response to the cellular energy status. INTRODUCTION Ribosomes are large...biogenesis must be tightly coupled to the energy status and nutrient levels of the cell...

Nithya Raman; Arnab Nayak; Stefan Muller

2014-10-06T23:59:59.000Z

71

Salmonella pathogenesis reveals that BMP signaling regulates blood cell homeostasis and immune  

E-Print Network [OSTI]

, continues with Zfh1 activation of Serpent (Srp; a GATA factor), and terminates with Srp activation of U-shaped (Ush) in hematopoietic cells. Hyperactivation of Zfh1, Srp, and Ush in dpp mutants leads to hyperplasia factor Serpent (Srp) and U-shaped (Ush). Several GATA proteins regulate key steps in mammalian

Newfeld, Stuart J.

72

The Arabidopsis RGA Gene Encodes a Transcriptional Regulator Repressing the Gibberellin Signal Transduction Pathway  

Science Journals Connector (OSTI)

...and occur in a diverse range of proteins (). However...bombardment (at the dose 60 Gy) by H. Brunner...Veen J.H. EMS- and radiation-induced mutation frequencies...Goodman H.M. Effects of ionizing radiation on a plant genomeAnalysis...

Aron L. Silverstone; Charles N. Ciampaglio; Tai-ping Sun

73

CD151 Accelerates Breast Cancer by Regulating ?6 Integrin Function, Signaling, and Molecular Organization  

Science Journals Connector (OSTI)

...Integrin Function, Signaling, and Molecular Organization Xiuwei H. Yang 1 Andrea L. Richardson 4 Maria I. Torres-Arzayus 2 Pengcheng Zhou 3 Chandan Sharma 1 Alexander R. Kazarov 1 Milena M. Andzelm 5 Jack L. Strominger 5 Myles Brown 2 Martin E. Hemler...

Xiuwei H. Yang; Andrea L. Richardson; Maria I. Torres-Arzayus; Pengcheng Zhou; Chandan Sharma; Alexander R. Kazarov; Milena M. Andzelm; Jack L. Strominger; Myles Brown; Martin E. Hemler

2008-05-01T23:59:59.000Z

74

Detection of signals in the ion cyclotron frequency range at the edge during ICRF heating on ASDEX Upgrade  

SciTech Connect (OSTI)

The ICRF system on ASDEX Upgrade is equipped with an arc detector based on the observation of frequencies between 5 and 25 MHz in the RF feeding line [R1]. On some shots, the detector was triggered in an anomalous way: tenths of detections over several hundreds of milliseconds on detectors of all antennas at the same time [R2]. It was suggested that these frequencies were not excited by arcs but came from the plasma. We installed a RF probe inside the vacuum vessel and connected it to a fast acquisition system. We indeed observed frequencies during ICRF heating of several shots. We present here the features of these frequencies, their possible conditions of existence in terms of plasma and RF parameters (magnetic field, density, temperature, RF frequency, power injected) and we compare the source of these frequencies with known phenomena like ICE, CAE and surface waves.

D'Inca, R.; Assas, S.; Bobkov, V. [Max Planck Institut fuer Plasmaphysik, Garching (Germany); EURATOM Association (Germany); Noterdaeme, J.-M. [Max Planck Institut fuer Plasmaphysik, Garching, Germany, EURATOM Association (Germany); Gent University, EESA Department (Belgium)

2009-11-26T23:59:59.000Z

75

The human regulator of G-protein signaling protein 6 gene (RGS6) maps between markers WI-5202 and D14S277 on chromosome 14q24.3  

Science Journals Connector (OSTI)

The recently discovered regulators of G-protein signaling proteins, termed the ... chromosomal location and tissue expression of the human regulator of RGS6 gene. The messenger RNA was ubiquitously expressed in ...

Naohiko Seki; Atsushi Hattori; Akiko Hayashi; Sumie Kozuma…

1999-03-01T23:59:59.000Z

76

DOE/EA-1631: Final Environmental Assessment for Department of Energy Loan Guarantee for Beacon Power Corporation Frequency Regulation Facility in Stephentown, NY (February 2009)  

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

31 31 Environmental Assessment for DEPARTMENT OF ENERGY LOAN GUARANTEE FOR BEACON POWER CORPORATION FREQUENCY REGULATION FACILITY IN STEPHENTOWN, N.Y. U.S. Department of Energy Loan Guarantee Program Office Washington, DC 20585 February 2009 FINAL ENVIRONMENTAL ASSESSMENT Environmental Assessment for Department of Energy Loan Guarantee for Beacon Power Corporation Frequency Regulation Facility in Stephentown, N.Y. DOE/EA-1631 TABLE OF CONTENTS LIST OF ACRONYMS iii 1.0 PURPOSE AND NEED 1 1.1 Introduction 1 1.2 Purpose and Need for Agency Action 1 2.0 DESCRIPTION OF PROPOSED ACTION AND NO ACTION ALTERNATIVE 3 2.1 Location 3 2.2 Proposed Action 3 2.2.1 Flywheel 3 2.2.2 Project Elements 4 2.2.3 Project Systems 5 2.2.4 Construction

77

INDEPENDENT SIGNALS FROM THE INFLUENCE OF INTERNAL MAGNETIC LAYERS ON THE FREQUENCIES OF SOLAR p-MODES  

SciTech Connect (OSTI)

The discovery that p-mode frequencies of low degree do not follow changes of solar surface activity during the recent solar minimum offers the possibility of a new diagnostic signature of the responsible pressure perturbation in the wave guiding medium, potentially rich of information regarding the structure of the Sun and the cause of the unusually long solar minimum. Magnetic fields, as well as temperature changes, introduce equilibrium pressure deviations that modify the resonant frequencies of p-mode oscillations. Assuming the perturbation to be caused by a horizontal layer of magnetic field located in a plane-stratified model of the Sun, we compile analytical frequency shifts and process them to allow direct comparison with observations. The effect of magnetism itself on the central p-mode frequencies can be neglected in comparison with the thermal effect of a perturbative layer buried in the solar interior. A parametric study shows that a layer as thin as 2100 km at subsurface depths is able to reproduce reported mean anomalous frequency shifts (not correlated with the surface activity), while a layer of size around 4200 km increasing by a small amount at depths near 0.08 R {sub sun} can explain individual low-degree shifts. It is also possible to obtain the mean shifts via the upward motion through depths near 0.03 R {sub sun} of a rising perturbative layer of thickness around 7000 km. Hence, the anomalous frequency shifts are best explained by thermal effects in the upper regions of the convection zone. The effects of latitudinal distribution are not treated here.

Foullon, C.; Nakariakov, V. M. [Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom)], E-mail: claire.foullon@warwick.ac.uk

2010-05-01T23:59:59.000Z

78

Gamma-amino Butyric Acid (GABA) Prevents the Induction of Nicotinic Receptor–Regulated Signaling by Chronic Ethanol in Pancreatic Cancer Cells and Normal Duct Epithelia  

Science Journals Connector (OSTI)

...Receptor-Regulated Signaling by Chronic Ethanol in Pancreatic Cancer Cells and Normal...this autocrine regulatory loop by chronic ethanol and explored the potential prevention...show that treatment for seven days with ethanol induced the protein expression and sensitivity...

Mohammed H. Al-Wadei; Hussein A.N. Al-Wadei; Hildegard M. Schuller

2013-02-01T23:59:59.000Z

79

Divergent cAMP Signaling Pathways Regulate Growth and Pathogenesis in the Rice Blast Fungus Magnaporthe grisea  

Science Journals Connector (OSTI)

...morphology, and reproduction revealed by targeted gene disruption Gilbert R.D. Johnson A.M. Dean R.A. Chemical signals responsible...Sequence Data Mutation Nuclear Proteins genetics Oryza sativa microbiology Sequence Homology, Amino Acid Signal Transduction Transcription...

Kiichi Adachi; John E. Hamer

80

Design & development fo a 20-MW flywheel-based frequency regulation power plant : a study for the DOE Energy Storage Systems program.  

SciTech Connect (OSTI)

This report describes the successful efforts of Beacon Power to design and develop a 20-MW frequency regulation power plant based solely on flywheels. Beacon's Smart Matrix (Flywheel) Systems regulation power plant, unlike coal or natural gas generators, will not burn fossil fuel or directly produce particulates or other air emissions and will have the ability to ramp up or down in a matter of seconds. The report describes how data from the scaled Beacon system, deployed in California and New York, proved that the flywheel-based systems provided faster responding regulation services in terms of cost-performance and environmental impact. Included in the report is a description of Beacon's design package for a generic, multi-MW flywheel-based regulation power plant that allows accurate bids from a design/build contractor and Beacon's recommendations for site requirements that would ensure the fastest possible construction. The paper concludes with a statement about Beacon's plans for a lower cost, modular-style substation based on the 20-MW design.

Rounds, Robert (Beacon Power, Tyngsboro, MA); Peek, Georgianne Huff

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

The Transcription Factor ABI4 Is Required for the Ascorbic Acidâ??Dependent Regulation of Growth and Regulation of Jasmonate-Dependent Defense Signaling Pathways in Arabidopsis  

Science Journals Connector (OSTI)

...expression of defense genes (Price et al., 2004; Sulmon et...triggered by these mutations. The ethylene response factor ERF104, which...mitogen-activated protein kinase and ethylene signaling. Plant Signal...2005). Effects of sugars on ethylene synthesis and responsiveness...

Pavel I. Kerchev; Till K. Pellny; Pedro Diaz Vivancos; Guy Kiddle; Peter Hedden; Simon Driscoll; HĂ©lĂšne Vanacker; Paul Verrier; Robert D. Hancock; Christine H. Foyer

2011-09-16T23:59:59.000Z

82

SPECTRUM OF SIGNALS VU KIM TUAN  

E-Print Network [OSTI]

a finite-energy signal, and ^f is the signal frequency content. If the signal frequency content ^f vanishes, Kuwait University P.O. Box 5969, Safat 13060, Kuwait. Abstract. Finite-energy high frequency signals the bandwidth of the signal. Conversely, if the signal frequency content ^f vanishes a.e. on a band

Tuan, Vu

83

Novel reciprocal regulation of cAMP signaling and apoptosis by orphan G-protein-coupled receptor GPRC5A gene expression  

SciTech Connect (OSTI)

GPRC5A is a member of G-protein-coupled receptors, which was originally identified as an all-trans-retinoic acid-induced gene. Although recent studies reported that this gene was highly expressed in the cancer cell lines and that GPRC5A might positively regulate cell proliferation, its mechanism remains unknown. We investigated the upstream and downstream signaling of GPRC5A and its biological function, and found that cAMP signaling is the novel GPRC5A induction pathway. When GPRC5A gene was overexpressed, intracellular cAMP concentration was decreased, and Gs{alpha} gene expression was downregulated. On the other hand, RNA interference of GPRC5A increased mRNA levels of Gs{alpha} and intracellular cAMP, reduced cell number, and induced apoptosis. Conversely, cell number was increased by GPRC5A overexpression. We first report the novel negative feedback model of cAMP signaling through GPRC5A gene expression. This evidence explains one of the mechanisms of the GPRC5A-regulated cell growth in some cancer cell lines.

Hirano, Minoru [Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu Mei 514-8507 (Japan); Zang, Liqing [Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu Mei 514-8507 (Japan); Oka, Takehiko [Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu Mei 514-8507 (Japan); Ito, Yoshiyuki [Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu Mei 514-8507 (Japan); Shimada, Yasuhito [Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu Mei 514-8507 (Japan); Nishimura, Yuhei [Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu Mei 514-8507 (Japan); Tanaka, Toshio [Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu Mei 514-8507 (Japan)]. E-mail: tanaka@doc.medic.mie-u.ac.jp

2006-12-08T23:59:59.000Z

84

Nuclear Extracellular Signal-Regulated Kinase 1 and 2 Translocation Is Mediated by Casein Kinase 2 and Accelerated by Autophosphorylation  

Science Journals Connector (OSTI)

...September 2011 research-article Articles Nuclear Extracellular...using the graphics program Coot (9). RESULTS...important for nuclear translocation...Journal Article Research Support, Non-U.S. Gov't | 0 Nuclear Localization Signals...

Alexander Plotnikov; Dana Chuderland; Yael Karamansha; Oded Livnah; Rony Seger

2011-07-05T23:59:59.000Z

85

Optimisation of voltage and frequency regulation in an isolated wind-driven six-phase self-excited induction generator  

Science Journals Connector (OSTI)

Abstract This paper presents a constant voltage operation of a Six-Phase Self-Excited Induction Generator (SPSEIG) driven by a fixed speed wind turbine using an Ant colony optimisation (ACO) technique to predict the behaviour of a the machine. In this paper, an attempt has been made to estimate the excitation capacitance requirements of a SPSEIG for maintaining rated terminal voltage and frequency. The range of capacitance variation required for maintaining constant terminal voltage while supplying a load of variable magnitude is evaluated. Analytical approaches, suitable for all the configurations of shunt capacitances such as variable excitation capacitance connected across (i) single three-phase winding set only and (ii) both the three-phase winding sets of an SPSEIG for operation as a simple shunt on no load and pure resistive load, are presented. The mathematical model developed is based on loop impedance method using graph theory. It is shown that the proposed technique is very effective and useful for making the SPSEIG feasible for remote areas with wind potential. The proposed approach is tested and compared with Genetic Algorithm (GA) and Fmincon technique.

A. Senthil Kumar; Josiah L. Munda

2014-01-01T23:59:59.000Z

86

Genetic deletion of Rnd3 results in aqueductal stenosis leading to hydrocephalus through up-regulation of Notch signaling  

Science Journals Connector (OSTI)

...signaling 10.1073/pnas.1219995110 Xi Lin Baohui Liu Xiangsheng Yang Xiaojing Yue...Huh MS Todd MA Picketts DJ ( 2009 ) SCO-ping out the mechanisms underlying the etiology of hydrocephalus...2853 – 2858 . 9 Riento K Guasch RM Garg R Jin B Ridley AJ ( 2003 ) RhoE binds to ROCK...

Xi Lin; Baohui Liu; Xiangsheng Yang; Xiaojing Yue; Lixia Diao; Jing Wang; Jiang Chang

2013-01-01T23:59:59.000Z

87

A comprehensive power loss, efficiency, reliability and cost calculation of a 1 MW/500 kWh battery based energy storage system for frequency regulation application  

Science Journals Connector (OSTI)

Abstract Battery based energy storage system (ESS) has tremendous diversity of application with an intense focus on frequency regulation market. An ESS typically comprised of a battery and a power conversion system. A calculation of performance parameters is performed in this research. The aim is to formulate an in-depth analysis of the ESS in terms of power losses of the semiconductor and electrical devices, efficiency, reliability and cost which would foster various research groups and industries around the globe to improve their future product. In view of this, a relation between the operating conditions and power losses is established to evaluate the efficiency of the system. The power loss calculation presented in this paper has taken into account the conduction and switching losses of the semiconductor devices. Afterwards, the Arrhenius Life Stress relation is adopted to calculate the reliability of the system by considering temperature as a covariate. And finally, a cost calculation is executed and presented as a percentage of total cost of the ESS. It has been found that the power loss and efficiency of the ESS at rated power is 146 kW and 85% respectively. Furthermore, the mean time between failures of the ESS is 8 years and reliability remains at 73% after a year. The major cost impact observed is for battery and PCS as 58% and 16% respectively. Finally, it has been determined that further research is necessary for higher efficient and lower cost system for high penetration of energy storage system in the market.

Md Arifujjaman

2015-01-01T23:59:59.000Z

88

Absolute frequency control of a 1560 nm (192 THz) semiconductor laser locked to a rubidium absorption line interrogated by a second harmonic generated signal  

SciTech Connect (OSTI)

We demonstrated second harmonic generation from a 1560 run DFB laser using a KNbO{sub 3} crystal. The 780 mm beam was used to interrogate a Rb line and lock the DFB laser frequency. We devised a setup to observe a saturated absorption profile which should be used to improve the frequency control.

Poulin, M.; Latrasse, C.; Tetu, M.; Breton, M. [Universite Laval, Ste Foy (Canada)

1994-12-31T23:59:59.000Z

89

Graphene Frequency Multipliers  

E-Print Network [OSTI]

In this letter, the ambipolar transport properties of graphene flakes have been used to fabricate full-wave signal rectifiers and frequency-doubling devices. By correctly biasing an ambipolar graphene field-effect transistor ...

Wang, Han

90

A Critical Role of the PTEN/PDGF Signaling Network for the Regulation of Radiosensitivity in Adenocarcinoma of the Prostate  

SciTech Connect (OSTI)

Purpose: Loss or mutation of the phosphate and tensin homologue (PTEN) is a common genetic abnormality in prostate cancer (PCa) and induces platelet-derived growth factor D (PDGF D) signaling. We examined the role of the PTEN/PDGF axis on radioresponse using a murine PTEN null prostate epithelial cell model. Methods and Materials: PTEN wild-type (PTEN{sup +/+}) and PTEN knockout (PTEN{sup ?/?}) murine prostate epithelial cell lines were used to examine the relationship between the PTEN status and radiosensitivity and also to modulate the PDGF D expression levels. PTEN{sup ?/?} cells were transduced with a small hairpin RNA (shRNA) lentiviral vector containing either scrambled nucleotides (SCRM) or sequences targeted to PDGF D (shPDGF D). Tumorigenesis and morphogenesis of these cell lines were evaluated in vivo via subcutaneous injection of male nude mice and in vitro using Matrigel 3-dimensional (3D) culture. Effects of irradiation on clonogenic survival, cell migration, and invasion were measured with respect to the PTEN status and the PDGF D expression level. In addition, apoptosis and cell cycle redistribution were examined as potential mechanisms for differences seen. Results: PTEN{sup ?/?} cells were highly tumorigenic in animals and effectively formed foci in 3D culture. Importantly, loss of PDGF D in these cell lines drastically diminished these phenotypes. Furthermore, PTEN{sup ?/?} cells demonstrated increased clonogenic survival in vitro compared to PTEN{sup +/+}, and attenuation of PDGF D significantly reversed this radioresistant phenotype. PTEN{sup ?/?} cells displayed greater migratory and invasive potential at baseline as well as after irradiation. Both the basal and radiation-induced migratory and invasive phenotypes in PTEN{sup ?/?} cells required PDGF D expression. Interestingly, these differences were independent of apoptosis and cell cycle redistribution, as they showed no significant difference. Conclusions: We propose that PDGF D represents a potentially promising target for PCa treatment resistance in the absence of PTEN function, and warrants further laboratory evaluation and clinical study.

Christensen, Michael, E-mail: mechristense@uwalumni.com [Department of Radiation Oncology, Wayne State University School of Medicine, Barbara Ann Karmanos Cancer Center, Detroit, Michigan (United States); Najy, Abdo J. [Department of Pathology, Wayne State University School of Medicine, Barbara Ann Karmanos Cancer Center, Detroit, Michigan (United States); Snyder, Michael; Movilla, Lisa S. [Department of Radiation Oncology, Wayne State University School of Medicine, Barbara Ann Karmanos Cancer Center, Detroit, Michigan (United States); Kim, Hyeong-Reh Choi [Department of Pathology, Wayne State University School of Medicine, Barbara Ann Karmanos Cancer Center, Detroit, Michigan (United States)

2014-01-01T23:59:59.000Z

91

Method and apparatus for monitoring the rotating frequency of de-energized induction motors  

DOE Patents [OSTI]

The rotational speed of a coasting induction motor is measured by sensing e residual electrical voltages at the power terminals of the motor, thus eliminating the need for conventional tachometer equipment, additional mechanical components or modifications to the induction motor itself. The power terminal voltage signal is detected and transformed into a DC voltage proportional to the frequency of the signal. This DC voltage can be input to the control system of a variable frequency motor controller to regulate the output characteristics thereof relative to the speed of the coasting motor. 6 figs.

Mikesell, H.E.; Lucy, E.

1998-02-03T23:59:59.000Z

92

Heterodyne laser instantaneous frequency measurement system  

DOE Patents [OSTI]

A heterodyne laser instantaneous frequency measurement system is disclosed. The system utilizes heterodyning of a pulsed laser beam with a continuous wave laser beam to form a beat signal. The beat signal is processed by a controller or computer which determines both the average frequency of the laser pulse and any changes or chirp of th frequency during the pulse.

Wyeth, Richard W. (Livermore, CA); Johnson, Michael A. (Pleasanton, CA); Globig, Michael A. (Livermore, CA)

1989-01-01T23:59:59.000Z

93

Frequency locking in the injection-locked frequency divider equation  

E-Print Network [OSTI]

We consider a model for the injection-locked frequency divider, and study analytically the locking onto rational multiples of the driving frequency. We provide explicit formulae for the width of the plateaux appearing in the devil's staircase structure of the lockings, and in particular show that the largest plateaux correspond to even integer values for the ratio of the frequency of the driving signal to the frequency of the output signal. Our results prove the experimental and numerical results available in the literature.

Bartuccelli, Michele V; Gentile, Guido

2008-01-01T23:59:59.000Z

94

Abstract 2322: The KIAA1549:BRAF fusion gene regulates mTOR signaling and gliomagenesis in a cell type- and brain region-specific manner.  

Science Journals Connector (OSTI)

...The KIAA1549:BRAF fusion gene regulates mTOR...gliomagenesis in a cell type- and brain region-specific...region- and cell type-specific growth...also observed in fusion BRAF-associated...The KIAA1549:BRAF fusion gene regulates mTOR...gliomagenesis in a cell type- and brain region-specific...

Aparna Kaul; Yi-Hsien Chen; Ryan J. Emnett; Sonika Dahiya; and David Gutmann

2013-08-14T23:59:59.000Z

95

Analyzing Signals Fourier transform  

E-Print Network [OSTI]

Page 1 1 Analyzing Signals Fourier transform s frequency content s linear combination of sin frequency analysis s windowed Fourier transform 6 #12;Page 4 7 Gabor Transform function to analyze window Gabor Transform Spatial domain Gabor domain b #12;Page 5 9 Gabor Transform Problems s discrete version

Sweldens, Wim

96

Frequency Control Performance Measurement and Requirements  

E-Print Network [OSTI]

changes in dispatch to follow load, implement interchangerequired for load frequency regulation, it follows that afollows [4]: “System frequency deviation and the resulting time error indicated the total imbalance of generation and load

Illian, Howard F.

2011-01-01T23:59:59.000Z

97

Wide band stepped frequency ground penetrating radar  

DOE Patents [OSTI]

A wide band ground penetrating radar system (10) embodying a method wherein a series of radio frequency signals (60) is produced by a single radio frequency source (16) and provided to a transmit antenna (26) for transmission to a target (54) and reflection therefrom to a receive antenna (28). A phase modulator (18) modulates those portion of the radio frequency signals (62) to be transmitted and the reflected modulated signal (62) is combined in a mixer (34) with the original radio frequency signal (60) to produce a resultant signal (53) which is demodulated to produce a series of direct current voltage signals (66) the envelope of which forms a cosine wave shaped plot (68) which is processed by a Fast Fourier Transform unit 44 into frequency domain data (70) wherein the position of a preponderant frequency is indicative of distance to the target (54) and magnitude is indicative of the signature of the target (54).

Bashforth, Michael B. (Buellton, CA); Gardner, Duane (Santa Maria, CA); Patrick, Douglas (Santa Maria, CA); Lewallen, Tricia A. (Ventura, CA); Nammath, Sharyn R. (Santa Barbara, CA); Painter, Kelly D. (Goleta, CA); Vadnais, Kenneth G. (Alexandria, VA)

1996-01-01T23:59:59.000Z

98

Tandemly Duplicated Arabidopsis Genes That Encode Polygalacturonase-Inhibiting Proteins Are Regulated Coordinately by Different Signal Transduction Pathways in Response to Fungal Infection  

Science Journals Connector (OSTI)

...1995). Oligogalacturonides and chitosan activate plant defensive genes through...fragments that regulate a proteinase inhibitor II gene from potato. Proc. Natl. Acad...1994). Structure and expression of an inhibitor of fungal polygalacturonases from tomato...

Simone Ferrari; Donatella Vairo; Frederick M. Ausubel; Felice Cervone; Giulia De Lorenzo

2002-12-19T23:59:59.000Z

99

Cooperativity among Rev-Associated Nuclear Export Signals Regulates HIV-1 Gene Expression and Is a Determinant of Virus Species Tropism  

Science Journals Connector (OSTI)

...USA d Department of Computer and Information Science, University of Constance, Constance, Germany...signal-mediated nuclear protein export. Science 278 :141-144. doi: 10.1126/science.278.5335.141 . 34. Stade, K , CS Ford...

Mounavya Aligeti; Ryan T. Behrens; Ginger M. Pocock; Johannes Schindelin; Christian Dietz; Kevin W. Eliceiri; Chad M. Swanson; Michael H. Malim; Paul Ahlquist; Nathan M. Sherer

2014-10-01T23:59:59.000Z

100

Dominant-Negative Receptor Uncovers Redundancy in the Arabidopsis ERECTA Leucine-Rich Repeat Receptorâ??Like Kinase Signaling Pathway That Regulates Organ Shape  

Science Journals Connector (OSTI)

...that coordinate these two processes at the supracellular level...that multiple overlapping and interrelated RLK signaling pathways, including...revealed the presence of multiple interrelated pathways that act together...the general cell elongation process. The cellular defects in...

Elena D. Shpak; Michael B. Lakeman; Keiko U. Torii

2003-04-03T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Arabidopsis TARGET OF RAPAMYCIN Interacts with RAPTOR, Which Regulates the Activity of S6 Kinase in Response to Osmotic Stress Signals  

Science Journals Connector (OSTI)

...signaling complexes: More TORC for the cell growth engine. Cell 111, 9-12. Abraham, R.T. (2005...1972). Experiments in Molecular Genetics. (Cold Spring Harbor, NY: Cold Spring Harbor Laboratory Press). Mizoguchi, T., Hayashida...

Magdy M. Mahfouz; Sunghan Kim; Ashton J. Delauney; Desh Pal S. Verma

2005-12-23T23:59:59.000Z

102

Library Regulations Library Regulations  

E-Print Network [OSTI]

Library Regulations 2012-13 Library Regulations UNIVERSITY OF BIRMINGHAM REGULATIONS LIBRARY REGULATIONS Preamble: The Library Regulations apply to all users of library facilities managed on behalf of the University by Library Services, and thus there are sections that apply also to non- members of the University

Birmingham, University of

103

SALT-RESPONSIVE ERF1 Regulates Reactive Oxygen Speciesâ??Dependent Signaling during the Initial Response to Salt Stress in Rice  

Science Journals Connector (OSTI)

...During the stress period, SC, TR, and CAR declined continuously in serf1 and wild-type...A similar observation was made for CAR at these time points (13 and 5% in serf1...imaging to isolate Arabidopsis mutants defective in stomatal regulation. Plant J. 30...

Romy Schmidt; Delphine Mieulet; Hans-Michael Hubberten; Toshihiro Obata; Rainer Hoefgen; Alisdair R. Fernie; Joachim Fisahn; Blanca San Segundo; Emmanuel Guiderdoni; Jos H.M. Schippers; Bernd Mueller-Roeber

2013-06-25T23:59:59.000Z

104

Abstract LB-279: SIRT6 expression is regulated by cAMP signaling system in non small cell lung cancer cells  

Science Journals Connector (OSTI)

...Is a Novel Regulator of Detachment-Induced Cell Death Kwang Je Kim 1 Je-Wook Yu 2 Hyun Sub Hwang 1 Eui-Ju Choi 1 Corresponding Author: Eui-Ju Choi, School of Life Sciences and Biotechnology, Korea University, Anam-dong, Seoul 136-701...

Eui-Jun Kim and Yong-Sung Juhnn

2012-04-15T23:59:59.000Z

105

Radio Frequency Signals in Jupiter's Atmosphere  

Science Journals Connector (OSTI)

...IMAGE OF A LARGE UPWARD ELECTRICAL-DISCHARGE...RINNERT K , HDB ATMOSPHERIC ELEC 27 ( 1995...MEASUREMENTS OF THE RF CHARACTERISTICS...JUPITER PLASMA-WAVE OBSERVATIONS...OBSERVATIONS OF UPPER ATMOSPHERIC OPTICAL FLASHES...Solar and thermal radiation...relatively large at the beginning...and about non-radiative...sensitive area of 6...

L. J. Lanzerotti; K. Rinnert; G. Dehmel; F. O. Gliem; E. P. Krider; M. A. Uman; J. Bach

1996-05-10T23:59:59.000Z

106

Zebrafish blowout provides genetic evidence for Patched1-mediated negative regulation of Hedgehog signaling within the proximal optic vesicle of the  

E-Print Network [OSTI]

signaling within the proximal optic vesicle of the vertebrate eye Jiwoon Lee a , Jason R. Willer c , Gregory Accepted 25 March 2008 Available online 4 April 2008 Keywords: Zebrafish Optic vesicle Coloboma Hedgehog colobomas and as a result, the retina and retinal pigmented epithelium are not contained within the optic

Gross, Jeff

107

Variable frequency microwave furnace system  

DOE Patents [OSTI]

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

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

1994-01-01T23:59:59.000Z

108

Variable frequency microwave furnace system  

DOE Patents [OSTI]

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

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

1994-06-14T23:59:59.000Z

109

Gyrophone: recognizing speech from gyroscope signals  

Science Journals Connector (OSTI)

We show that the MEMS gyroscopes found on modern smart phones are sufficiently sensitive to measure acoustic signals in the vicinity of the phone. The resulting signals contain only very low-frequency information (<200Hz). Nevertheless we show, using ...

Yan Michalevsky, Dan Boneh, Gabi Nakibly

2014-08-01T23:59:59.000Z

110

Distinct MAPK signaling pathways, p21 up-regulation and caspase-mediated p21 cleavage establishes the fate of U937 cells exposed to 3-hydrogenkwadaphnin: Differentiation versus apoptosis  

SciTech Connect (OSTI)

Despite the depth of knowledge concerning the pathogenesis of acute myeloblastic leukemia (AML), long-term survival remains unresolved. Therefore, new agents that act more selectively and more potently are required. In that line, we have recently characterized a novel diterpene ester, called 3-hydrogenkwadaphnin (3-HK), with capability to induce both differentiation and apoptosis in various leukemia cell lines. These effects of 3-HK were mediated through inhibition of inosine 5'-monophosphate dehydrogenase, a selective up-regulated enzyme in cancerous cells, especially leukemia. However, it remains elusive to understand how cells display different fates in response to 3-HK. Here, we report the distinct molecular signaling pathways involved in forcing of 3-HK-treated U937 cells to undergo differentiation and apoptosis. After 3-HK (15 nM) treatment, a portion of U937 cells adhered to the culture plates and showed macrophage criteria while others remained in suspension and underwent apoptosis. The differentiated cells arrested in G{sub 0}/G{sub 1} phase of cell cycle and showed early activation of ERK1/2 pathway (3 h) along with ERK-dependent p21{sup Cip/WAF1} (p21) up-regulation and expression of p27{sup Kip1} and Bcl-2. In contrast, the suspension cells underwent apoptosis through Fas/FasL and mitochondrial pathways. The occurrence of apoptosis in these cells were accompanied with caspase-8-mediated p21 cleavage and delayed activation (24 h) of JNK1/2 and p38 MAPK. Taken together, these results suggest that distinct signaling pathways play a pivotal role in fates of drug-treated leukemia cells, thus this may pave some novel therapeutical utilities.

Moosavi, Mohammad Amin [Institute of Biochemistry and Biophysics, P. O. Box 13145-1384 University of Tehran, Tehran (Iran, Islamic Republic of); Yazdanparast, Razieh [Institute of Biochemistry and Biophysics, P. O. Box 13145-1384 University of Tehran, Tehran (Iran, Islamic Republic of)], E-mail: yazdan@ibb.ut.ac.ir

2008-07-01T23:59:59.000Z

111

Analog signal isolation techniques  

SciTech Connect (OSTI)

This paper discusses several techniques for isolating analog signals in an accelerator environment. The techniques presented here encompass isolation amplifiers, voltage-to-frequency converters (VIFCs), transformers, optocouplers, discrete fiber optics, and commercial fiber optic links. Included within the presentation of each method are the design issues that must be considered when selecting the isolation method for a specific application.

Beadle, E.R.

1992-01-01T23:59:59.000Z

112

Analog signal isolation techniques  

SciTech Connect (OSTI)

This paper discusses several techniques for isolating analog signals in an accelerator environment. The techniques presented here encompass isolation amplifiers, voltage-to-frequency converters (VIFCs), transformers, optocouplers, discrete fiber optics, and commercial fiber optic links. Included within the presentation of each method are the design issues that must be considered when selecting the isolation method for a specific application.

Beadle, E.R.

1992-12-31T23:59:59.000Z

113

A nonlinear optoelectronic filter for electronic signal processing  

E-Print Network [OSTI]

The conversion of electrical signals into modulated optical waves and back into electrical signals provides the capacity for low-loss radio-frequency (RF) signal transfer over optical fiber. Here, we show that the unique ...

Loh, William

114

Gene Frequency  

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

Gene Frequency Gene Frequency Name: donna Location: N/A Country: N/A Date: N/A Question: If six fingers is a dominant human trait why do we have only five? Replies: This is simple. There are just not many genes in the human population for six fingers. Steve Sample Look in any high school biology book for what is known as Hardy-Weinberg equilibrium. These two scientists (separately) said that gene frequencies do not change much unless something in the environment selects them over other genes. In other words, unless 6 fingers somehow becomes an advantage, and five-fingered people have less of an advantage, the frequency of six fingered people in the population will not necessarily increase. This is the same reason that recessive traits don't disappear from the population. Also, six fingers is not considered attractive and they may not get as many mates. Also, more people are born with six fingers than you might imagine but just have them amputated shortly after birth.

115

Definition: Overlap Regulation Service | Open Energy Information  

Open Energy Info (EERE)

Overlap Regulation Service Overlap Regulation Service Jump to: navigation, search Dictionary.png Overlap Regulation Service A method of providing regulation service in which the Balancing Authority providing the regulation service incorporates another Balancing Authority's actual interchange, frequency response, and schedules into providing Balancing Authority's AGC/ACE equation.[1] Related Terms regulation service, frequency response, balancing authority, smart grid References ↑ Glossary of Terms Used in Reliability Standards An inl LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ine Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Overlap_Regulation_Service&oldid=502490" Categories: Definitions ISGAN Definitions

116

Regulation Services with Demand Response - Energy Innovation...  

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

Regulation Services with Demand Response Pacific Northwest National Laboratory Contact PNNL About This Technology Using grid frequency information, researchers have created...

117

Smart Frequency-Sensing Charge Controller for Electric Vehicles...  

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

licensing:System uses frequency-sensing charge controllers that provide automatic demand response and regulation service to the grid by reducing or turning the charging load...

118

A novel voltage and frequency controller for standalone DFIG based Wind Energy Conversion System  

Science Journals Connector (OSTI)

Abstract This paper presents a new speed-sensorless control strategy for a stand-alone doubly-fed induction generator supplying energy to an isolated load. The method is based on the root mean square (rms) detection scheme. The generated stator voltage is controlled via rotor currents. Amplitude of stator voltage and its frequency are controlled simultaneously. The output signals from the voltage controllers are the reference signals for the rotor current amplitude and frequency of the stator voltage is regulated with the help of frequency control loop. This developed direct voltage control method is applicable for both the balanced and unbalanced load and also for standalone and grid connected mode. The control pulses for the rotor side converter is supplied by the hysteresis controller which is operated on the error signal calculated between actual and reference rotor currents. This paper also provides the brief idea about the voltage and frequency control on modern Autonomous DFIG based Wind Energy Systems via single phase mathematical model of standalone DFIG system. A short state-of-the-art review on mechanical position/speed sensorless control schemes for autonomous DFIG based \\{WESs\\} is presented, which helps the present researcher and students working in this area. These include stator flux oriented control techniques; direct voltage control techniques; MARS observer based techniques for autonomous DFIG-based variable-speed WESs. Simulation results obtained from a 2MVA DFIG system, prototype in MATLab/Simulink, are presented and discussed in this paper.

Rishabh Dev Shukla; Ramesh Kumar Tripathi

2014-01-01T23:59:59.000Z

119

Audio classification from time-frequency texture  

E-Print Network [OSTI]

Time-frequency representations of audio signals often resemble texture images. This paper derives a simple audio classification algorithm based on treating sound spectrograms as texture images. The algorithm is inspired ...

Slotine, Jean-Jacques E.

120

Variable frequency microwave heating apparatus  

DOE Patents [OSTI]

A variable frequency microwave heating apparatus (10) designed to allow modulation of the frequency of the microwaves introduced into a multi-mode microwave cavity (34) for testing or other selected applications. The variable frequency microwave heating apparatus (10) includes a microwave signal generator (12) and a high-power microwave amplifier (20) or a high-power microwave oscillator (14). A power supply (22) is provided for operation of the high-power microwave oscillator (14) or microwave amplifier (20). A directional coupler (24) is provided for detecting the direction and amplitude of signals incident upon and reflected from the microwave cavity (34). A first power meter (30) is provided for measuring the power delivered to the microwave furnace (32). A second power meter (26) detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load (28).

Bible, Don W. (Clinton, TN); Lauf, Robert J. (Oak Ridge, TN); Johnson, Arvid C. (Lake in the Hills, IL); Thigpen, Larry T. (Angier, NC)

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Burst Radio-Frequency Excited Pulsed Hollow-Cathode Lamp  

Science Journals Connector (OSTI)

Transient emission characteristics of a hollow-cathode lamp driven by a pulsed current in combination with a radio-frequency burst signal are described. The radio-frequency field...

Araki, Tsutomu; Walters, John P; Minami, Shigeo

1980-01-01T23:59:59.000Z

122

Frequency and phaselock control of a 3 THz quantum cascade laser.  

SciTech Connect (OSTI)

We have locked the frequency of a 3 THz quantum cascade laser (QCL) to that of a far-infrared gas laser with a tunable microwave offset frequency. The locked QCL line shape is essentially Gaussian, with linewidths of 65 and 141 kHz at the -3 and -10 dB levels, respectively. The lock condition can be maintained indefinitely, without requiring temperature or bias current regulation of the QCL other than that provided by the lock error signal. The result demonstrates that a terahertz QCL can be frequency controlled with 1-part-in-108 accuracy, which is a factor of 100 better than that needed for a local oscillator in a heterodyne receiver for atmospheric and astronomic spectroscopy.

Williams, Benjamin S. (Massachusetts Institute of Technology, Cambridge, MA); Hu, Qing (Massachusetts Institute of Technology, Cambridge, MA); Reno, John Louis; Boreiko, R. T. (University of Colorado, Boulder, CO); Betz, A. L. (University of Colorado, Boulder, CO); Kumar, S. (Massachusetts Institute of Technology, Cambridge, MA)

2005-03-01T23:59:59.000Z

123

E-Print Network 3.0 - apoptotic vascular signaling Sample Search...  

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

of a signal molecule that negatively regulates vascular differentiation... . Berleth, T., Mattsson, J. and Hardtke, C.S. (2000). Vascular conti- nuity and auxin signals. Trends...

124

Intrinsically Disordered Proteins: Regulation and Disease Regulation of IDPs  

E-Print Network [OSTI]

31st Jan 2011 Intrinsically Disordered Proteins: Regulation and Disease Regulation of IDPs M. Madan ......................................................................................................................................8 #12;1 Abstract Intrinsically disordered proteins (IDPs) are often enriched in signaling and regulatory functions because the features of disordered segments permit interaction with multiple proteins

Babu, M. Madan

125

An Evaluation of the NaS Battery Storage Potential for Providing Regulation Service in California  

SciTech Connect (OSTI)

Sodium sulfur (NaS) batteries can provide energy storage, real-time dispatch, regulation, frequency response, and other essential services to the power grids. This study presents the technical characteristics, modeling approach, methodologies, and results for providing regulation services in the California Independent System Operator (CAISO) market. Two different scenarios were studied and compared: a scenario without intermittent renewable-energy resource penetration (base case) and a scenario with significant renewable-energy resource penetration (including wind) reaching 20% of CAISO’s energy supply. In addition, breakeven cost analyses were developed for four cases. Based on the results of the technical and cost analyses, the opportunities for the NaS battery providing the regulation services are discussed, design improvements for the battery’s physical characteristics are recommended, and modifications of the regulation signals sent to NaS batteries are proposed.

Lu, Ning; Weimar, Mark R.; Makarov, Yuri V.; Loutan, Clyde

2011-03-23T23:59:59.000Z

126

Regulation of PHLPP and Akt signaling  

E-Print Network [OSTI]

S. Cheng, P. R. Shepherd, I. Gout, C. P. Downes, R. F. Lamb,S. Cheng, P. R. Shepherd, I. Gout, C. P. Downes, R. F. Lamb,

Warfel, Noel Andrew

2011-01-01T23:59:59.000Z

127

Electromagnetic Signals from Bacterial DNA  

E-Print Network [OSTI]

Chemical reactions can be induced at a distance due to the propagation of electromagnetic signals during intermediate chemical stages. Although is is well known at optical frequencies, e.g. photosynthetic reactions, electromagnetic signals hold true for muck lower frequencies. In E. coli bacteria such electromagnetic signals can be generated by electric transitions between energy levels describing electrons moving around DNA loops. The electromagnetic signals between different bacteria within a community is a "wireless" version of intercellular communication found in bacterial communities connected by "nanowires". The wireless broadcasts can in principle be of both the AM and FM variety due to the magnetic flux periodicity in electron energy spectra in bacterial DNA orbital motions.

A. Widom; J. Swain; Y. N. Srivastava; S. Sivasubramanian

2012-02-09T23:59:59.000Z

128

Arabidopsis Adapts to Copper Deficient Conditions via SPL7, a Master Regulator for Copper Homeostasis  

E-Print Network [OSTI]

systemic down-regulation of copper protein expression inresponse to low copper availability in Arabidopsis. J. Biol.A regulator of nutritional copper signaling in Chlamydomonas

Yamasaki, Hiroaki; Shikanai, Toshiharu

2009-01-01T23:59:59.000Z

129

Monitoring method and apparatus using high-frequency carrier  

DOE Patents [OSTI]

A method and apparatus for monitoring an electrical-motor-driven device by injecting a high frequency carrier signal onto the power line current. The method is accomplished by injecting a high frequency carrier signal onto an AC power line current. The AC power line current supplies the electrical-motor-driven device with electrical energy. As a result, electrical and mechanical characteristics of the electrical-motor-driven device modulate the high frequency carrier signal and the AC power line current. The high frequency carrier signal is then monitored, conditioned and demodulated. Finally, the modulated high frequency carrier signal is analyzed to ascertain the operating condition of the electrical-motor-driven device. 6 figs.

Haynes, H.D.

1996-04-30T23:59:59.000Z

130

Method and apparatus for optical communication by frequency modulation  

DOE Patents [OSTI]

Laser optical communication according to this invention is carried out by producing multi-frequency laser beams having different frequencies, splitting one or more of these constituent beams into reference and signal beams, encoding information on the signal beams by frequency modulation and detecting the encoded information by heterodyne techniques. Much more information can be transmitted over optical paths according to the present invention than with the use of only one path as done previously.

Priatko, Gordon J. (Oakland, CA)

1988-01-01T23:59:59.000Z

131

Regulation of cell fate by phosphorylation : a tale of two transcription factors  

E-Print Network [OSTI]

As transcription factors are the nuclear effectors of signaling cascades, mechanisms must exist to specifically regulate their activities in response to signaling events. Regulation can occur at the DNA, RNA, or protein ...

Tootle, Tina Louise

2004-01-01T23:59:59.000Z

132

Characterization of arcs in frequency domain  

SciTech Connect (OSTI)

Arc detection systems are developed for ICRH on ITER to prevent arcs from damaging the RF components. One of the detectors, the Sub-Harmonic Arc Detector (SHAD) is based on the detection of the frequencies emitted in the MHz range by arcs [R1]. To ensure the high level of reliability required for this safety system, it is necessary to demonstrate that these frequencies present a signal with a Signal to Noise Ratio high enough to be detected under the wide range of operational conditions (frequency, power, configuration) and for the different types of arcs that can appear in the feeding lines and on the antennas (vacuum arc, glow discharge, multipactor-induced discharge). For each type of arc, we analyze the evolution of the frequency spectrum relative to the evolution of other electrical parameters (reflected power, voltage)

D'Inca, R.; Siegl, G.; Faugel, H.; Braun, F.; Eckert, B.; Bobkov, V. [Max Planck Institut fuer Plasmaphysik, Garching, Germany, EURATOM Association (Germany); El Khaldi, M. [CEA, IRFM, F-13108 Saint-Paul-lez-Durance (France); Noterdaeme, J.-M. [Max Planck Institut fuer Plasmaphysik, Garching, Germany, EURATOM Association (Germany); Gent University, EESA Department (Belgium)

2009-11-26T23:59:59.000Z

133

High frequency rectenna  

DOE Patents [OSTI]

The invention provides an inexpensive array of rectifying antennas which employ field emission diodes for rectifying electromagnetic waves of microwave frequencies and higher frequencies.

Logan, B. Grant (Danville, CA); Orvis, William J. (Livermore, CA)

1991-01-01T23:59:59.000Z

134

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

135

Does polyandry control population sex ratio via regulation of a selfish gene?  

Science Journals Connector (OSTI)

...polyandry could regulate the frequency of SR by undermining...a sufficiently high frequency of sperm competition...polyandry and meiotic drive frequency in the wild, we determined...and, for the most variable locus, dividing the...

2014-01-01T23:59:59.000Z

136

Regulation of Branching by Phytochrome and Phytohormones  

E-Print Network [OSTI]

Light is the fundamental source of energy and information throughout the plant life cycle. Light signals regulate plant architecture and branching, key processes that determine biomass production and grain yield. Low red (R) to far-red (FR) light...

Krishnareddy, Srirama R.

2012-07-16T23:59:59.000Z

137

Oscillator Architectures and Enhanced Frequency Synthesizer  

E-Print Network [OSTI]

A voltage controlled oscillator (VCO), that generates a periodic signal whose frequency is tuned by a voltage, is a key building block in any integrated circuit systems. A sine wave oscillator can be used for a built-in self testing where high...

Park, Sang Wook

2009-11-16T23:59:59.000Z

138

AUDIO FORENSIC AUTHENTICATION BASED ON MOCC BETWEEN ENF AND REFERENCE SIGNALS  

E-Print Network [OSTI]

AUDIO FORENSIC AUTHENTICATION BASED ON MOCC BETWEEN ENF AND REFERENCE SIGNALS Zhisheng Lv1 of Warwick, Coventry CV4 7AL, UK ABSTRACT This paper proposes a new audio authenticity detection algorithm Frequency) signal and the reference signal. We first extract the ENF signal from a query audio signal

Li, Chang-Tsun

139

Multichannel heterodyning for wideband interferometry, correlation and signal processing  

DOE Patents [OSTI]

A method of signal processing a high bandwidth signal by coherently subdividing it into many narrow bandwidth channels which are individually processed at lower frequencies in a parallel manner. Autocorrelation and correlations can be performed using reference frequencies which may drift slowly with time, reducing cost of device. Coordinated adjustment of channel phases alters temporal and spectral behavior of net signal process more precisely than a channel used individually. This is a method of implementing precision long coherent delays, interferometers, and filters for high bandwidth optical or microwave signals using low bandwidth electronics. High bandwidth signals can be recorded, mathematically manipulated, and synthesized.

Erskine, David J. (Oakland, CA)

1999-01-01T23:59:59.000Z

140

Multichannel heterodyning for wideband interferometry, correlation and signal processing  

DOE Patents [OSTI]

A method is disclosed of signal processing a high bandwidth signal by coherently subdividing it into many narrow bandwidth channels which are individually processed at lower frequencies in a parallel manner. Autocorrelation and correlations can be performed using reference frequencies which may drift slowly with time, reducing cost of device. Coordinated adjustment of channel phases alters temporal and spectral behavior of net signal process more precisely than a channel used individually. This is a method of implementing precision long coherent delays, interferometers, and filters for high bandwidth optical or microwave signals using low bandwidth electronics. High bandwidth signals can be recorded, mathematically manipulated, and synthesized. 50 figs.

Erskine, D.J.

1999-08-24T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

SnRK1A-Interacting Negative Regulators Modulate the Nutrient Starvation Signaling Sensor SnRK1 in Source-Sink Communication in Cereal Seedlings under Abiotic Stress  

Science Journals Connector (OSTI)

...adaptation to limited energy. The double knockout...to mobilize starch reserves in response to darkness...light with limited energy, while the double...which aggravate a world crop productivity...J. (2013). World food security at...regulators at the heart of energy control? Trends...

Chien-Ru Lin; Kuo-Wei Lee; Chih-Yu Chen; Ya-Fang Hong; Jyh-Long Chen; Chung-An Lu; Ku-Ting Chen; Tuan-Hua David Ho; Su-May Yu

2014-02-25T23:59:59.000Z

142

Energy localization and frequency analysis in the locust ear  

Science Journals Connector (OSTI)

...research-article Research articles 1004 25 29 34 Energy localization and frequency analysis in...are exquisitely adapted to capture sound energy and perform signal analysis. Studying...tsunami-like fashion, resulting in energy localization that focuses vibrations onto...

2014-01-01T23:59:59.000Z

143

Maximum-likelihood carrier estimation in orthogonal frequency division multiplexing systems  

E-Print Network [OSTI]

The octagonal frequency division multiplexing (OFDM) phics. signaling is proven to be an elective way to overcome the effects of fading channel and multi-path by dividing the frequency selective fading channel into a number of sub-channels...

Huq, Ayesha Tahmina

1998-01-01T23:59:59.000Z

144

16-kDa Prolactin Down-Regulates Inducible Nitric Oxide Synthase Expression through Inhibition of the Signal Transducer and Activator of Transcription 1/IFN Regulatory Factor-1 Pathway  

Science Journals Connector (OSTI)

...a NH2-terminal natural breakdown fragment...inhibition of a signaling cascade involving the p38...IFN-gamma-activated sequence (GAS) element (mut-IRF-1...expression through the GAS element in the IRF-1...interact at the IRF-1 GAS in PRL-stimulated...a NH2-terminal natural breakdown fragment...

Sok-hyong Lee; Michiya Nishino; Tuhina Mazumdar; Gabriela E. Garcia; Matthew Galfione; Florence L. Lee; Cynthia L. Lee; Albert Liang; Jeri Kim; Lili Feng; N. Tony Eissa; Sue-Hwa Lin; and Li-yuan Yu-Lee

2005-09-01T23:59:59.000Z

145

Definition: Automated Voltage Regulators | Open Energy Information  

Open Energy Info (EERE)

Regulators Regulators Jump to: navigation, search Dictionary.png Automated Voltage Regulators Voltage regulators are transformers that can increase or decrease the voltage on a distribution circuit to help keep the voltage within a pre-determined band. Unlike capacitor banks, voltage regulators cannot adjust power factor. These devices typically monitor the voltage at the location where they are connected, and compare it to a programmed set point. If the voltage deviates too far from the set point, the voltage regulator can increase or decrease its output voltage by moving the tap on the secondary side up or down. An automated voltage regulator can operate with remote control signals, or in concert with other area voltage control devices, to help regulate distribution voltage in a coordinated fashion.

146

Eastern Frequency Response Study  

SciTech Connect (OSTI)

This study was specifically designed to investigate the frequency response of the Eastern Interconnection that results from large loss-of-generation events of the type targeted by the North American Electric Reliability Corp. Standard BAL-003 Frequency Response and Frequency Bias Setting (NERC 2012a), under possible future system conditions with high levels of wind generation.

Miller, N.W.; Shao, M.; Pajic, S.; D'Aquila, R.

2013-05-01T23:59:59.000Z

147

Government Regulation  

E-Print Network [OSTI]

Abstract. Interest in the use of so-called voluntary approaches to supplement or replace formal environmental regulation is on the rise, both in Europe and in the United States. These approaches fall into two general ...

Ashford, Nicholas

2005-01-01T23:59:59.000Z

148

Frequency selective infrared sensors  

DOE Patents [OSTI]

A frequency selective infrared (IR) photodetector having a predetermined frequency band. The exemplary frequency selective photodetector includes: a dielectric IR absorber having a first surface and a second surface substantially parallel to the first surface; an electrode electrically coupled to the first surface of the dielectric IR absorber; and a frequency selective surface plasmonic (FSSP) structure formed on the second surface of the dielectric IR absorber. The FSSP structure is designed to selectively transmit radiation in the predetermined frequency band that is incident on the FSSP structure substantially independent of the angle of incidence of the incident radiation on the FSSP structure.

Davids, Paul; Peters, David W

2013-05-28T23:59:59.000Z

149

Frequency selective infrared sensors  

SciTech Connect (OSTI)

A frequency selective infrared (IR) photodetector having a predetermined frequency band. The exemplary frequency selective photodetector includes: a dielectric IR absorber having a first surface and a second surface substantially parallel to the first surface; an electrode electrically coupled to the first surface of the dielectric IR absorber; and a frequency selective surface plasmonic (FSSP) structure formed on the second surface of the dielectric IR absorber. The FSSP structure is designed to selectively transmit radiation in the predetermined frequency band that is incident on the FSSP structure substantially independent of the angle of incidence of the incident radiation on the FSSP structure.

Davids, Paul; Peters, David W

2014-11-25T23:59:59.000Z

150

Scram signal generator  

DOE Patents [OSTI]

A scram signal generating circuit for nuclear reactor installations monitors a flow signal representing the flow rate of the liquid sodium coolant which is circulated through the reactor, and initiates reactor shutdown for a rapid variation in the flow signal, indicative of fuel motion. The scram signal generating circuit includes a long-term drift compensation circuit which processes the flow signal and generates an output signal representing the flow rate of the coolant. The output signal remains substantially unchanged for small variations in the flow signal, attributable to long term drift in the flow rate, but a rapid change in the flow signal, indicative of a fast flow variation, causes a corresponding change in the output signal. A comparator circuit compares the output signal with a reference signal, representing a given percentage of the steady state flow rate of the coolant, and generates a scram signal to initiate reactor shutdown when the output signal equals the reference signal.

Johanson, Edward W. (New Lenox, IL); Simms, Richard (Westmont, IL)

1981-01-01T23:59:59.000Z

151

What's the Frequency, Kenneth?: Sublinear Fourier Sampling Off the Grid  

E-Print Network [OSTI]

What's the Frequency, Kenneth?: Sublinear Fourier Sampling Off the Grid Petros Boufounos1 , Volkan Fourier sampling algorithm for a case of sparse off-grid frequency recovery. These are signals {j} satisfy j [, 2-] and mini=j |i -j| for some > 0. We design a sublinear time randomized

Boufounos, Petros T.

152

Frequency stabilization of a Titanium-Sapphire laser for  

E-Print Network [OSTI]

Frequency stabilization of a Titanium-Sapphire laser for precision spectroscopy on Calcium ions . . . . . . . . . . . . . . . . . . . . . . . 53 5.3.2 In-loop error signal . . . . . . . . . . . . . . . . . . . . . . 56 6 Laser linewidth 59 6.1 Performance estimation with the in-loop error signal . . . . . . . 59 6.1.1 Theoretical description

Blatt, Rainer

153

Cancellation of the Signal Fading for 60 GHz Subcarrier Multiplexed Optical DSB Signal Transmission in Nondispersion Shifted Fiber Using Midway Optical Phase Conjugation  

Science Journals Connector (OSTI)

In millimeter-wave (mm-wave) optical double sideband (DSB) signal transmission systems, the received radio frequency (RF) power fades periodically because of the group velocity...

Sotobayashi, Hideyuki; Kitayama, Ken-ichi

1999-01-01T23:59:59.000Z

154

Frequency Combs for Astronomy  

Science Journals Connector (OSTI)

For the first time a mode filtered frequency comb has been used to calibrate an astronomical spectrometer online. Solar and calibration spectra have been recorded simultaneously.

Wilken, Tobias; Hänsch, Theodor W; Udem, Thomas; Steinmetz, Tilo; Holzwarth, Ronald; Araujo-Hauck, Constanza; Pasquini, Luca; D'Odorico, Sandro; Manescau, Antonio; Murphy, Michael T; Kentischer, Thomas; Schmidt, Wolfgang

155

Investigations into the role of protein phosphatases in the EGFR signaling network  

E-Print Network [OSTI]

Protein phosphatases regulate the phosphorylation state of intracellular signaling molecules in conjunction with protein kinases. In order to better understand the role of phosphatases in the ErbB signaling network, ...

Lu, Kuojung Gordon

2008-01-01T23:59:59.000Z

156

The design and synthesis of nuclear localization signal (NLS) mimics  

E-Print Network [OSTI]

Nuclear import of proteins is a carefully controlled process that is critical for cellular function and regulation. A protein is marked for nuclear entry by a nuclear localization signal (NLS), a peptide motif, which typically consists of one or two...

Ho, Thai Huu

2013-02-22T23:59:59.000Z

157

WNT signaling: An emerging mediator of cancer cell metabolism?  

Science Journals Connector (OSTI)

...cancer metabolism remains under investigated. Cancer is also a metabolic disease where oncogenic signaling pathways regulate energy production and macromolecular synthesis to fuel rapidly proliferating tumors. This review highlights the emerging evidence...

Victoria Sherwood

2014-10-27T23:59:59.000Z

158

Stabilized radio frequency quadrupole  

DOE Patents [OSTI]

Disclosed is a long-vane stabilized radio frequency resonator for accelerating charged particles and including means defining a radio frequency resonator cavity, a plurality of long vanes mounted in the defining means for dividing the cavity into sections, and means interconnecting opposing ones of the plurality of vanes for stabilizing the resonator. 5 figs.

Lancaster, H.D.; Fugitt, J.A.; Howard, D.R.

1984-12-25T23:59:59.000Z

159

Standard Frequency Broadcasts  

Science Journals Connector (OSTI)

... Mc./sec., at least three of which are available at any time; standard audio frequencies of 440 and 4,000 c./sec. broadcast on these carriers; and ... second of every minute the pulse is omitted. The 1-min. interval in the audio-frequency transmission is used to give the station announcement, either in Morse or (at ...

1944-09-02T23:59:59.000Z

160

E-Print Network 3.0 - actuated traffic signal controllers Sample...  

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

4 American Institute of Aeronautics and Astronautics Resonance-Enhanced High-Frequency Micro-Actuators with Summary: the piezoelectric actuators' control signal and the...

Note: This page contains sample records for the topic "frequency regulation signal" 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

Long distance transmission of SC-FDMA signals by directly-modulated OIL-VCSEL  

Science Journals Connector (OSTI)

We demonstrate the long distance transmission of single-carrier frequency division multiple address signals by directly-modulated optically injection-locked ...

Guo, Peng; Zhang, Cheng; Li, Juhao; Yang, Weijian; Parekh, Devang; Chang-Hasnain, Connie J; Hu, Weiwei; Xu, Anshi; Chen, Zhangyuan

2012-01-01T23:59:59.000Z

162

Cell signalling: Nutrient sensing lost in cancer  

Science Journals Connector (OSTI)

... and cancer. Reporting in Science, Bar-Peled et al. identify a protein complex called GATOR that is crucial for linking nutrient sensing by the cell to the control of cell ... cells disconnect their growth from normal growth-control signals. Bar-Peled et al. identify GATOR as a crucial regulator of Rag proteins. They show that this protein complex is ...

Suchithra Menon; Brendan D. Manning

2013-06-26T23:59:59.000Z

163

Intracellular Signaling by the Unfolded Protein  

E-Print Network [OSTI]

reticulum stress, signal transduction, organelle homeostasis, protein folding, regulated mRNA splicing triggers an exten- sive transcriptional response, which adjusts the ER protein folding capacity according to reestablish homeostasis in the cell's protein folding capacity or--if this cannot be achieved-- commit cells

Mullins, Dyche

164

Tone signal generator for producing multioperator tone signals using an operator circuit including a waveform generator, a selector and an enveloper  

DOE Patents [OSTI]

A frequency modulation (FM) tone signal generator for generating a FM tone signal is disclosed. The tone signal generator includes a waveform generator having a plurality of wave tables, a selector and an enveloper. The waveform generator furnishes a waveform signal in response to a phase angle address signal. Each wave table stores a different waveform. The selector selects one of the wave tables in response to a plurality of selection signals such that the selected wave table largely provides the waveform signal upon being addressed largely by the phase angle address signal. Selection of the selected wave table varies with each selection signal. The enveloper impresses an envelope signal on the waveform signal. The envelope signal is used as a carrier or modulator for generating the FM tone signal.

Dong, Qiujie (Austin, TX); Jenkins, Michael V. (Austin, TX); Bernadas, Salvador R. (Austin, TX)

1997-01-01T23:59:59.000Z

165

Tone signal generator for producing multioperator tone signals using an operator circuit including a waveform generator, a selector and an enveloper  

DOE Patents [OSTI]

A frequency modulation (FM) tone signal generator for generating a FM tone signal is disclosed. The tone signal generator includes a waveform generator having a plurality of wave tables, a selector and an enveloper. The waveform generator furnishes a waveform signal in response to a phase angle address signal. Each wave table stores a different waveform. The selector selects one of the wave tables in response to a plurality of selection signals such that the selected wave table largely provides the waveform signal upon being addressed largely by the phase angle address signal. Selection of the selected wave table varies with each selection signal. The enveloper impresses an envelope signal on the waveform signal. The envelope signal is used as a carrier or modulator for generating the FM tone signal. 17 figs.

Dong, Q.; Jenkins, M.V.; Bernadas, S.R.

1997-09-09T23:59:59.000Z

166

Regulation 28: Library REGULATION 28: LIBRARY  

E-Print Network [OSTI]

Regulation 28: Library 180 REGULATION 28: LIBRARY The purpose of this Regulation is to safeguard the common interests of all Library users. All persons are admitted on the understanding that they have read and agreed to observe the Library Regulations. Breach of this Regulation could result in membership being

Sussex, University of

167

Oxidants, Antioxidants and Cell Signaling  

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

Oxidants, Antioxidants and Cell Signaling Oxidants, Antioxidants and Cell Signaling Speaker(s): Chandan K. Sen Date: February 17, 1998 - 12:00pm Location: 90-3148 Seminar Host/Point of Contact: Richard Sextro Reactive oxygen species represent a common mediator of environmental stress such as during physical exercise, ozone exposure, UV radiation and xenobiotic (pollutant) metabolism. Antioxidant defense systems protect against the ravages of such reactive species. In contrast to the conventional idea that reactive oxygen is mostly a trigger for oxidative damage of biological structures, now we know that low physiologically relevant concentration of reactive oxygen species can regulate a variety of key molecular mechanisms that may be linked with important processes such as immune response, cell-cell adhesion, cell proliferation, inflammation,

168

Regulation of Meiotic Recombination  

SciTech Connect (OSTI)

Meiotic recombination results in the heritable rearrangement of DNA, primarily through reciprocal exchange between homologous chromosome or gene conversion. In plants these events are critical for ensuring proper chromosome segregation, facilitating DNA repair and providing a basis for genetic diversity. Understanding this fundamental biological mechanism will directly facilitate trait mapping, conventional plant breeding, and development of genetic engineering techniques that will help support the responsible production and conversion of renewable resources for fuels, chemicals, and the conservation of energy (1-3). Substantial progress has been made in understanding the basal recombination machinery, much of which is conserved in organisms as diverse as yeast, plants and mammals (4, 5). Significantly less is known about the factors that regulate how often and where that basal machinery acts on higher eukaryotic chromosomes. One important mechanism for regulating the frequency and distribution of meiotic recombination is crossover interference - or the ability of one recombination event to influence nearby events. The MUS81 gene is thought to play an important role in regulating the influence of interference on crossing over. The immediate goals of this project are to use reverse genetics to identify mutants in two putative MUS81 homologs in the model plant Arabidopsis thaliana, characterize those mutants and initiate a novel forward genetic screen for additional regulators of meiotic recombination. The long-term goal of the project is to understand how meiotic recombination is regulated in higher eukaryotes with an emphasis on the molecular basis of crossover interference. The ability to monitor recombination in all four meiotic products (tetrad analysis) has been a powerful tool in the arsenal of yeast geneticists. Previously, the qrt mutant of Arabidopsis, which causes the four pollen products of male meiosis to remain attached, was developed as a facile system for assaying recombination using tetrad analysis in a higher eukaryotic system (6). This system enabled the measurement of the frequency and distribution of recombination events at a genome wide level in wild type Arabidopsis (7), construction of genetic linkage maps which include positions for each centromere (8), and modeling of the strength and pattern of interference (9). This proposal extends the use of tetrad analysis in Arabidopsis by using it as the basis for assessing the phenotypes of mutants in genes important for recombination and the regulation of crossover interference and performing a novel genetic screen. In addition to broadening our knowledge of a classic genetic problem - the regulation of recombination by crossover interference - this proposal also provides broader impact by: generating pedagogical tools for use in hands-on classroom experience with genetics, building interdisciplinary collegial partnerships, and creating a platform for participation by junior scientists from underrepresented groups. There are three specific aims: (1) Isolate mutants in Arabidopsis MUS81 homologs using T-DNA and TILLING (2) Characterize recombination levels and interference in mus81 mutants (3) Execute a novel genetic screen, based on tetrad analysis, for genes that regulate meiotic recombination

Gregory p. Copenhaver

2011-11-09T23:59:59.000Z

169

Assessing the Value of Regulation Resources Based on Their Time Response Characteristics  

SciTech Connect (OSTI)

Fast responsive regulation resources are potentially more valuable as a power system regulation resource (more efficient) because they allow applying controls at the exact moment and in the exact amount as needed. Faster control is desirable because it facilitates more reliable compliance with the NERC Control Performance Standards at relatively lesser regulation capacity procurements. The current California ISO practices and markets do not provide a differentiation among the regulation resources based on their speed of response (with the exception of some minimum ramping capabilities). Some demand response technologies, including some generation and energy storage resources, can provide quicker control actions. California ISO practices and markets could be updated to welcome more fast regulation resources into the California ISO service area. The project work reported in this work was pursuing the following objectives: • Develop methodology to assess the relative value of generation resources used for regulation and load following California ISO functions • This assessment should be done based on physical characteristics including the ability to quickly change their output following California ISO signals • Evaluate what power is worth on different time scales • Analyze the benefits of new regulation resources to provide effective compliance with the mandatory NERC Control Performance Standards • Evaluate impacts of the newly proposed BAAL and FRR standards on the potential value of fast regulation and distributed regulation resources • Develop a scope for the follow-up projects to pave a road for the new efficient types of balancing resources in California. The work included the following studies: • Analysis of California ISO regulating units characteristics • California ISO automatic generation system (AGC) analysis • California ISO regulation procurement and market analysis • Fast regulation efficiency analysis • Projection of the California ISO load following and regulation requirements into the future • Value of fast responsive resources depending on their ramping capability • Potential impacts of the balancing authority area control error limit (BAAL), which is a part of the newly proposed NERC standard “Balancing Resources and Demand” • Potential impacts of the Western Electricity Coordinating Council (WECC) frequency responsive reserve (FRR) standard • Recommendations for the next phase of the project. The following main conclusions and suggestions for the future have been made: • The analysis of regulation ramping requirements shows that the regulation system should be able to provide ramps of at least 40-60 MW per minute for a period up to 6 minutes. • Evaluate if changes are needed in the California ISO AGC system to effectively accommodate new types of fast regulation resources and minimize the California ISO regulation procurement. • California ISO may consider creating better market opportunities for and incentives for fast responsive resources. • An additional study of low probability high ramp events can be recommended to the California ISO. • The California ISO may be willing to consider establishing a more relaxed target CPS2 compliance level. • A BAAL-related study can be recommended for the California ISO as soon as more clarity is achieved concerning the actual enforcement of the BAAL standard and its numerical values for the California ISO. The study may involve an assessment of advantages of the distributed frequency-based control for the California ISO system. The market-related issues that arise in this connection can be also investigated. • A FRR-related study can be recommended for the California ISO as soon as more clarity is achieved concerning the actual enforcement of the FRR standard and its numerical values for the California ISO.

Makarov, Yuri V.; Lu, Shuai; Ma, Jian; Nguyen, Tony B.

2008-06-01T23:59:59.000Z

170

Variable Frequency Pump Drives  

E-Print Network [OSTI]

-frequency electric motor drive. What is happenin9 with variable frequency driven pun,ps is a classical illustration that evolution in technical products takes place not only because of changes in the processes served by these products, or because of innovations...-pole 3550 rpm squirrel caqe induction motor became available in the early 1930s that high pressure pumps operating at that speed could be buil t. And now, in the 1980s, the development of the solid-state, variable frequency electric motor drive...

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

171

Can Collimated Extraterrestrial Signals be Intercepted?  

E-Print Network [OSTI]

The Optical Search for Extraterrestrial Intelligence (OSETI) attempts to detect collimated, narrowband pulses of electromagnetic radiation. These pulses may either consist of signals intentionally directed at the Earth, or signals between two star systems with a vector that unintentionally intersects the Solar System, allowing Earth to intercept the communication. But should we expect to be able to intercept these unintentional signals? And what constraints can we place upon the frequency of intelligent civilisations if we do? We carry out Monte Carlo Realisation simulations of interstellar communications between civilisations in the Galactic Habitable Zone (GHZ) using collimated beams. We measure the frequency with which beams between two stars are intercepted by a third. The interception rate increases linearly with the fraction of communicating civilisations, and as the cube of the beam opening angle, which is somewhat stronger than theoretical expectations, which we argue is due to the geometry of the GHZ...

Forgan, Duncan H

2014-01-01T23:59:59.000Z

172

Variable Frequency Drives  

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

How BPA Supports VFDs Rebates are available from your utility for Variable Frequency Drives on pumps 20hp or greater and storage fans.. Energy savings from VFDs vary and can...

173

Mechanically tunable plasma frequency  

E-Print Network [OSTI]

in S12 phases. function [eps, x] = FindPerm(Thru, Sample,It returns the permittivity (eps) and a frequency matrix %0; % Initialize results matrix eps = zeros(n,1); for i = 1:n

Schuil, Crystal Joy

2009-01-01T23:59:59.000Z

174

The effect of difference frequency on electrocommunication: Chirp production and encoding in a species of weakly electric fish, Apteronotus leptorhynchus  

E-Print Network [OSTI]

an electric field (electric organ discharge, EOD) and can detect electric signals in their environments using the frequency and amplitude of their EOD. The Type 2 chirp, a transient increase in EOD frequency, is the most by the difference in EOD frequency between interacting fish, the so-called beat or difference frequency (Df). Chirps

Benda, Jan

175

Introduction The structure and function of animal communication signals, like  

E-Print Network [OSTI]

gymnotiform electric fish reveal mechanisms that regulate energy allocated to sexual advertisement signals and Nowicki, 2005), communication should be cooperative and signals should be as efficient as possible through dynamical remodeling of the excitable membranes in the electric organ. Further, males of the short

Stoddard, Philip

176

IEEE PHOTONICS TECHNOLOGY LETTERS 1 Remote Optoelectronic Frequency Down-Conversion  

E-Print Network [OSTI]

IEEE PHOTONICS TECHNOLOGY LETTERS 1 Remote Optoelectronic Frequency Down-Conversion Using 60-GHz Kim, Associate Member, IEEE Abstract--A new optoelectronic frequency down-conversion method for radio local oscillator signals. Using this optoelectronic frequency down-converter, an RoF uplink

Choi, Woo-Young

177

Methods and apparatuses using filter banks for multi-carrier spread-spectrum signals  

DOE Patents [OSTI]

A transmitter includes a synthesis filter bank to spread a data symbol to a plurality of frequencies by encoding the data symbol on each frequency, apply a common pulse-shaping filter, and apply gains to the frequencies such that a power level of each frequency is less than a noise level of other communication signals within the spectrum. Each frequency is modulated onto a different evenly spaced subcarrier. A demodulator in a receiver converts a radio frequency input to a spread-spectrum signal in a baseband. A matched filter filters the spread-spectrum signal with a common filter having characteristics matched to the synthesis filter bank in the transmitter by filtering each frequency to generate a sequence of narrow pulses. A carrier recovery unit generates control signals responsive to the sequence of narrow pulses suitable for generating a phase-locked loop between the demodulator, the matched filter, and the carrier recovery unit.

Moradi, Hussein; Farhang, Behrouz; Kutsche, Carl A

2014-05-20T23:59:59.000Z

178

Methods and apparatuses using filter banks for multi-carrier spread-spectrum signals  

DOE Patents [OSTI]

A transmitter includes a synthesis filter bank to spread a data symbol to a plurality of frequencies by encoding the data symbol on each frequency, apply a common pulse-shaping filter, and apply gains to the frequencies such that a power level of each frequency is less than a noise level of other communication signals within the spectrum. Each frequency is modulated onto a different evenly spaced subcarrier. A demodulator in a receiver converts a radio frequency input to a spread-spectrum signal in a baseband. A matched filter filters the spread-spectrum signal with a common filter having characteristics matched to the synthesis filter bank in the transmitter by filtering each frequency to generate a sequence of narrow pulses. A carrier recovery unit generates control signals responsive to the sequence of narrow pulses suitable for generating a phase-locked loop between the demodulator, the matched filter, and the carrier recovery unit.

Moradi, Hussein; Farhang, Behrouz; Kutsche, Carl A

2014-10-14T23:59:59.000Z

179

Application of the inverse wavelet transform on electrochemical current signals  

E-Print Network [OSTI]

, Frequency distribution charts, Frequencies Paper type Research paper 1. Introduction Electrochemical noise, 1968). Two main methods can be used to analyze electrochemical noise, namely sequence of electrochemical noise signals due to their dynamic nature. The wavelet transform was first applied to noise

Volinsky, Alex A.

180

Maximizing the revenues of data centers in regulation market by coordinating with electric vehicles  

Science Journals Connector (OSTI)

Abstract Frequency regulation is a major market service to reduce the undesired imbalance between power supply and demand in the power market. In order to participate in the regulation market, both the supply and demand sides need to be capable of flexibly adjusting their power generation and consumption, respectively. As the scale of Internet data centers is increasing rapidly, their significant power consumption has enabled them to become an important player in the regulation market for maximized profits and thus minimized operating expenses. On the other side, Plug-in Hybrid Electric Vehicles (PHEVs) have also recently been identified as a major participant in the regulation market, due to their large power demand for battery charging. In this paper, we propose a novel power management scheme that jointly leverages a data center and its employees’ \\{PHEVs\\} to (1) maximize the revenues that the data center receives from the regulation market and (2) get the \\{PHEVs\\} charged at no expense to their owners. Our scheme features a two-level hierarchical power control design. At the first level, our scheme interacts with the regulation market to provide information about the data center power consumption on an hourly basis. At the second level, the scheme decides the power budgets for the servers and UPS in the data center, as well as PHEVs, in real time, to follow the given regulation signal. In addition, we show how to leverage the thermal energy storage (TES) tanks available in many data centers to adapt the cooling power consumption for better management of the data center power demand and further increased regulation revenues. We evaluate the proposed scheme with real-world workload and regulation traces. The results show that our scheme performs a high-quality regulation service. As a result, the proposed scheme outperforms several commonly used baselines by having higher regulation revenues, and so lower operating expenses, for the data center. Finally, we analyze the cost savings of the PHEV owners, throughout the lifetime of the PHEVs, by getting their batteries charged at no expense.

Marco Brocanelli; Sen Li; Xiaorui Wang; Wei Zhang

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Regulators, Requirements, Statutes  

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

Statutes Regulators, Requirements, Statutes The Laboratory must comply with environmental laws and regulations that apply to Laboratory operations. Contact Environmental...

182

Regulation of gene expression and cell state in embryonic stem cells  

E-Print Network [OSTI]

Cell state is established and maintained through the combined action of transcription factors, chromatin regulators and signaling pathways, which all contribute to a transcriptional regulatory circuitry. Embryonic stem ...

Newman, Jamie Jennifer

2010-01-01T23:59:59.000Z

183

E-Print Network 3.0 - arts-1 regulates extracellular Sample Search...  

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

of Neurobiology, Yale University Collection: Biology and Medicine 2 Extracellular ATP signaling in plants Kiwamu Tanaka1 Summary: of extracellular ATP in the regulation of...

184

Regulation of Drosophila eye development by the transcription factors : eyes absent and Spenito  

E-Print Network [OSTI]

During development of an adult organism from a fertilized embryo, signaling pathways are deployed reiteratively to regulate a variety of cellular processes, including cell proliferation, specification, differentiation, ...

Jemc, Jennifer Colleen

2007-01-01T23:59:59.000Z

185

Method for curing polymers using variable-frequency microwave heating  

DOE Patents [OSTI]

A method for curing polymers incorporating a variable frequency microwave furnace system designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity is disclosed. By varying the frequency of the microwave signal, non-uniformities within the cavity are minimized, thereby achieving a more uniform cure throughout the workpiece. A directional coupler is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter is provided for measuring the power delivered to the microwave furnace. A second power meter detects the magnitude of reflected power. The furnace cavity may be adapted to be used to cure materials defining a continuous sheet or which require compressive forces during curing. 15 figs.

Lauf, R.J.; Bible, D.W.; Paulauskas, F.L.

1998-02-24T23:59:59.000Z

186

Method for curing polymers using variable-frequency microwave heating  

DOE Patents [OSTI]

A method for curing polymers (11) incorporating a variable frequency microwave furnace system (10) designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity (34). By varying the frequency of the microwave signal, non-uniformities within the cavity (34) are minimized, thereby achieving a more uniform cure throughout the workpiece (36). A directional coupler (24) is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter (30) is provided for measuring the power delivered to the microwave furnace (32). A second power meter (26) detects the magnitude of reflected power. The furnace cavity (34) may be adapted to be used to cure materials defining a continuous sheet or which require compressive forces during curing.

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

1998-01-01T23:59:59.000Z

187

A computer-based physics laboratory apparatus: Signal generator software  

Science Journals Connector (OSTI)

This paper describes a computer-based physics laboratory apparatus to replace expensive instruments such as high-precision signal generators. This apparatus uses a sound card in a common personal computer to give sinusoidal signals with an accurate frequency that can be programmed to give different frequency signals repeatedly. An experiment on standing waves on an oscillating string uses this apparatus. In conjunction with interactive lab manuals which have been developed using personal computers in our university we achieve a complete set of low-cost accurate and easy-to-use equipment for teaching a physics laboratory.

Tharest Thanakittiviroon; Sompong Liangrocapart

2005-01-01T23:59:59.000Z

188

Frequencies for Radio Astronomy  

Science Journals Connector (OSTI)

... must therefore be achieved through the combined action of three international scientific unions, IAU (astronomy), COSPAR (space) and URSI (radio), which jointly delegate members to an ... jointly delegate members to an Inter-Union Commission for the Allocation of Frequencies for Radio Astronomy and Space Science (IUCAF). This Commission discusses the scientific case for protecting various ...

F. G. SMITH

1970-10-31T23:59:59.000Z

189

Compensated gain control circuit for buck regulator command charge circuit  

DOE Patents [OSTI]

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

Barrett, David M. (Albuquerque, NM)

1996-01-01T23:59:59.000Z

190

Compensated gain control circuit for buck regulator command charge circuit  

DOE Patents [OSTI]

A buck regulator command charge circuit includes a compensated-gain control signal for compensating for changes in the component values in order to achieve optimal voltage regulation. The compensated-gain control circuit includes an automatic-gain control circuit for generating a variable-gain control signal. The automatic-gain control circuit is formed of a precision rectifier circuit, a filter network, an error amplifier, and an integrator circuit. 5 figs.

Barrett, D.M.

1996-11-05T23:59:59.000Z

191

Radio frequency coupling apparatus and method for measuring minority carrier lifetimes in semiconductor materials  

DOE Patents [OSTI]

An apparatus for measuring the minority carrier lifetime of a semiconductor sample using radio-frequency coupling. The measuring apparatus includes an antenna that is positioned a coupling distance from a semiconductor sample which is exposed to light pulses from a laser during sampling operations. A signal generator is included to generate high frequency, such as 900 MHz or higher, sinusoidal waveform signals that are split into a reference signal and a sample signal. The sample signal is transmitted into a sample branch circuit where it passes through a tuning capacitor and a coaxial cable prior to reaching the antenna. The antenna is radio-frequency coupled with the adjacent sample and transmits the sample signal, or electromagnetic radiation corresponding to the sample signal, to the sample and receives reflected power or a sample-coupled-photoconductivity signal back. To lower impedance and speed system response, the impedance is controlled by limiting impedance in the coaxial cable and the antenna reactance. In one embodiment, the antenna is a waveguide/aperture hybrid antenna having a central transmission line and an adjacent ground flange. The sample-coupled-photoconductivity signal is then transmitted to a mixer which also receives the reference signal. To enhance the sensitivity of the measuring apparatus, the mixer is operated to phase match the reference signal and the sample-coupled-photoconductivity signal.

Johnston, Steven W. (Golden, CO); Ahrenkiel, Richard K. (Lakewood, CO)

2002-01-01T23:59:59.000Z

192

Apparatus for millimeter-wave signal generation  

DOE Patents [OSTI]

An opto-electronic integrated circuit (OEIC) apparatus is disclosed for generating an electrical signal at a frequency .gtoreq.10 GHz. The apparatus, formed on a single substrate, includes a semiconductor ring laser for generating a continuous train of mode-locked lasing pulses and a high-speed photodetector for detecting the train of lasing pulses and generating the electrical signal therefrom. Embodiments of the invention are disclosed with an active waveguide amplifier coupling the semiconductor ring laser and the high-speed photodetector. The invention has applications for use in OEICs and millimeter-wave monolithic integrated circuits (MMICs).

Vawter, G. Allen (Albuquerque, NM); Hietala, Vincent M. (Placitas, NM); Zolper, John C. (Albuquerque, NM); Mar, Alan (Albuquerque, NM); Hohimer, John P. (Albuquerque, NM)

1999-01-01T23:59:59.000Z

193

Addition at the Molecular Level: Signal Integration in Designed PerARNTSim Receptor Proteins  

E-Print Network [OSTI]

, such as the widespread Per­ARNT­ Sim (PAS) domains, detect signals and, in response, regulate the biological activity and blue light in a positive cooperative manner. The extent of the response to the signals was dictated organisms must sense diverse chemical and physical input signals such as light, temperature, electric field

Möglich, Andreas

194

High frequency reference electrode  

DOE Patents [OSTI]

A high frequency reference electrode for electrochemical experiments comprises a mercury-calomel or silver-silver chloride reference electrode with a layer of platinum around it and a layer of a chemically and electrically resistant material such as TEFLON around the platinum covering all but a small ring or halo' at the tip of the reference electrode, adjacent to the active portion of the reference electrode. The voltage output of the platinum layer, which serves as a redox electrode, and that of the reference electrode are coupled by a capacitor or a set of capacitors and the coupled output transmitted to a standard laboratory potentiostat. The platinum may be applied by thermal decomposition to the surface of the reference electrode. The electrode provides superior high-frequency response over conventional electrodes. 4 figs.

Kronberg, J.W.

1994-05-31T23:59:59.000Z

195

Isoprenylcysteine Methylation and Demethylation Regulate Abscisic Acid Signaling in Arabidopsis  

Science Journals Connector (OSTI)

...tomato (Solanum lycopersicum) (Loraine et al., 1996; Yalovsky et al., 1996...Arabidopsis. Plant Physiol. 126: 670-684. Loraine, A.E., Yalovsky, S., Fabry, S...Cell 12: 1267-1278. Yalovsky, S., Loraine, A.E., and Gruissem, W. (1996...

David H. Huizinga; Olutope Omosegbon; Bilal Omery; Dring N. Crowell

2008-10-28T23:59:59.000Z

196

Requirements for security signalling  

SciTech Connect (OSTI)

There has been some interest lately in the need for ``authenticated signalling``, and the development of signalling specifications by the ATM Forum that support this need. The purpose of this contribution is to show that if authenticated signalling is required, then supporting signalling facilities for directory services (i.e. key management) are also required. Furthermore, this contribution identifies other security related mechanisms that may also benefit from ATM-level signalling accommodations. For each of these mechanisms outlined here, an overview of the signalling issues and a rough cut at the required fields for supporting Information Elements are provided. Finally, since each of these security mechanisms are specified by a number of different standards, issues pertaining to the selection of a particular security mechanism at connection setup time (i.e. specification of a required ``Security Quality of Service``) are also discussed.

Pierson, L.G.; Tarman, T.D.

1995-02-05T23:59:59.000Z

197

Frequency Synthesizers and Oscillator Architectures Based on Multi-Order Harmonic Generation  

E-Print Network [OSTI]

Frequency synthesizers are essential components for modern wireless and wireline communication systems as they provide the local oscillator signal required to transmit and receive data at very high rates. They are also vital for computing devices...

Abdul-Latif, Mohammed

2012-02-14T23:59:59.000Z

198

E-Print Network 3.0 - audio frequency Sample Search Results  

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

Processing, ECE-539 Summary: auread.m or wavread.m to import the audio file into MATLAB using a sampling frequency of fs 10 kHz. Use... that the input audio signal has both...

199

Relationship between Frequency of RFID Tags and Its Ability to Penetrate Fresh Concrete  

E-Print Network [OSTI]

, which is capable of transmitting information wirelessly. Previous research implemented using ultra high frequency RFID tags embedded in fresh concrete found that water could be the impediment for transmitting RFID signal from within concrete during early...

Sridharan, Rajasekaran

2011-08-08T23:59:59.000Z

200

Medical Signal Searching  

E-Print Network [OSTI]

The PAA and DFT representations of an ECG signal composed ofAggregate Approximation (PAA) [KCP01], Discrete Fourierpower of distance computations. PAA and DFT are perhaps the

Woodbridge, Jonathan Scott

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Frequency Scalable Non-Linear Waveform Generator for Mixed-Simal Power-Factor-Correction IC Controller'  

E-Print Network [OSTI]

operates with a fixed switching frequency fs and variable duty ratio R, and can be analyzed using standard of a switching period, a fixed-frequency clock pulse sets the switch drive high. A signal proportionalFrequency Scalable Non-Linear Waveform Generator for Mixed-Simal Power-Factor-Correction IC

202

Road Traffic Signalling  

Science Journals Connector (OSTI)

... of the speakers suggested that the amber light should be regarded as the signal for pedestrians. Much was said in favour of a gyratory system being adopted in Oxford Circus. ... times of the day, although the green lights are showing, by the crowds of pedestrians in Oxford Street. A model for the automatic control of signals at crossings was ...

1932-01-30T23:59:59.000Z

203

HVDC control system based on parallel digital signal processors  

SciTech Connect (OSTI)

A numerical HVDC control system operating in real time has been developed for a simulator to be used for operator training. The control system, implemented with digital signal processors (DSPs), consists of typical HVDC control functions such as the synchronizing unit, the regulation unit, the protection unit, the firing unit, the tap changer and the reactive power regulation unit. Results from the steady-state and the transient performance validation tests carried out on the IREQ power system simulator are provided.

Maharsi, Y.; Do, V.Q.; Sood, V.K.; Casoria, S.; Belanger, J. [Hydro-Quebec, Varennes, Quebec (Canada)] [Hydro-Quebec, Varennes, Quebec (Canada)

1995-05-01T23:59:59.000Z

204

Modeling and analysis of early events in T-lymphocyte antigen-activated intracellular-signaling pathways  

Science Journals Connector (OSTI)

The T-cell antigen-activated signaling pathway is a highly regulated intracellular biochemical system that is crucial for initiating an appropriate adaptive immune response. To improve the understanding of the complex regulatory mechanisms controlling ... Keywords: Bistability, Feedback regulation, Hysteresis, Mathematical modeling, T-cell signaling

Yanan Zheng; Venkataramanan Balakrishnan; Greg Buzzard; Robert Geahlen; Marietta Harrison; Ann Rundell

2005-12-01T23:59:59.000Z

205

Signal detection in temporally modulated and spectrally shaped maskers  

Science Journals Connector (OSTI)

The first part of this paper presents several experiments on signal detection in temporally modulated noise yielding a general approach toward the concept of comodulation masking release (CMR). Measurements were made on masked thresholds of both long? and short?duration narrow?band signals presented in a 100% sinusoidally amplitude?modulated (SAM) noise masker (modulation frequency 32 Hz) as a function of masker bandwidth from 1/3 oct up to 13/3 octs while the masker band was geometrically centered at signal frequency. With the short?duration signals placed in the valley of the masker a substantial CMR (i.e. a decrease of masked threshold with increasing masker bandwidth) was found whereas for the long?duration signals CMR was smaller. Furthermore investigations were carried out to determine whether CMR changes when the bandwidth of the signals consisting of bandpass impulse responses is increased. The data indicate that substantial CMR remains even when all masker bands contain a signal component thus minimizing across?channel differences. This finding is not in line with current models accounting for the CMR phenomenon. The second part of this paper concerns signal detection in spectrally shaped noise. Also investigated was whether release from masking occurs for the detection of a pure?tone signal at a valley or a peak of a simultaneously presented masking noise with a sinusoidally rippled power spectrum when this masker was preceded and followed by a second noise (temporal flanking burst) with an identical spectral shape as the on?signal noise. Similar to CMR effects for temporal modulations the data indicate that coshaping masking release (CSMR) occurs when the signal is placed in a valley of the spectral envelope of the masker whereas no release from masking is found when the signal is placed at a peak of the spectral envelope of the masker. The implications of these experiments for measures of spectral and temporal resolution are discussed.

Willem A. C. van den Brink; Tammo Houtgast; Guido F. Smoorenburg

1992-01-01T23:59:59.000Z

206

A Cardiac Electro-physiological Model Based Approach for Filtering High Frequency ECG Noise  

E-Print Network [OSTI]

A Cardiac Electro-physiological Model Based Approach for Filtering High Frequency ECG Noise MA on automatic diagnoses of cardiac disease through ECG signals, de-noising tech- niques that do not introduce noise from ECG signals. The proposed modeling technique is based on the propagation of the electric

Povinelli, Richard J.

207

Frequency stabilization of an InGaAsP distributed feedback laser to an NH/sub 3/ absorption line at 15137 A with an external frequency modulator  

SciTech Connect (OSTI)

The oscillation frequency of a 1.5-..mu..m InGaAsP distributed feedback laser is stabilized to an NH/sub 3/ linear absorption line at 15137 A. A LiNbO/sub 3/ external frequency modulator is used instead of direct frequency modulation of the laser to extract error signals. An effective bandwidth of 100 kHz for the feedback loop is obtained through this external modulation scheme. Frequency stability of sigma(2,tau) = 4 x 10/sup -11/ is achieved for an averaging time of 1 s< or =tau< or =100 s.

Yanagawa, T.; Saito, S.; Machida, S.; Yamamoto, Y.; Noguchi, Y.

1985-11-15T23:59:59.000Z

208

Research Article Signaling Threat  

E-Print Network [OSTI]

Research Article Signaling Threat How Situational Cues Affect Women in Math, Science and organization,canmake potentialtargetsvulnerabletosocial identity threat.Objective and subjective measuresofidentity threat were collected from male and female math, science, and engineering (MSE) majors who watched

Gross, James J.

209

Method for estimation of gravitational-wave transient model parameters in frequency-time maps  

E-Print Network [OSTI]

A common technique for detection of gravitational-wave signals is searching for excess power in frequency-time maps of gravitational-wave detector data. In the event of a detection, model selection and parameter estimation will be performed in order to explore the properties of the source. In this paper, we develop a Bayesian statistical method for extracting model-dependent parameters from observed gravitational-wave signals in frequency-time maps. We demonstrate the method by recovering the parameters of model gravitational-wave signals added to simulated advanced LIGO noise. We also characterize the performance of the method and discuss prospects for future work.

Michael Coughlin; Nelson Christensen; Jonathan Gair; Shivaraj Kandhasamy; Eric Thrane

2014-04-17T23:59:59.000Z

210

Light beam frequency comb generator  

DOE Patents [OSTI]

A light beam frequency comb generator uses an acousto-optic modulator to generate a plurality of light beams with frequencies which are uniformly separated and possess common noise and drift characteristics. A well collimated monochromatic input light beam is passed through this modulator to produce a set of both frequency shifted and unshifted optical beams. An optical system directs one or more frequency shifted beams along a path which is parallel to the path of the input light beam such that the frequency shifted beams are made incident on the modulator proximate to but separated from the point of incidence of the input light beam. After the beam is thus returned to and passed through the modulator repeatedly, a plurality of mutually parallel beams are generated which are frequency-shifted different numbers of times and possess common noise and drift characteristics.

Priatko, Gordon J. (Cupertino, CA); Kaskey, Jeffrey A. (Livermore, CA)

1992-01-01T23:59:59.000Z

211

Global Transcription Profiling Reveals Multiple Sugar Signal Transduction Mechanisms in Arabidopsis  

Science Journals Connector (OSTI)

...ethylene levels. Because ethylene decreases the sensitivity...seedling development (Price et al., 2003), a decrease in ethylene caused by glucose...regulation of plant ethylene hormone signaling...115, 679-689. Price, J., Li, T...

John Price; Ashverya Laxmi; Steven K. St. Martin; Jyan-Chyun Jang

2004-07-23T23:59:59.000Z

212

Effective switching frequency multiplier inverter  

DOE Patents [OSTI]

A switching frequency multiplier inverter for low inductance machines that uses parallel connection of switches and each switch is independently controlled according to a pulse width modulation scheme. The effective switching frequency is multiplied by the number of switches connected in parallel while each individual switch operates within its limit of switching frequency. This technique can also be used for other power converters such as DC/DC, AC/DC converters.

Su, Gui-Jia (Oak Ridge, TN); Peng, Fang Z. (Okemos, MI)

2007-08-07T23:59:59.000Z

213

New York State Regulations  

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

New York New York State Regulations: New York State of New York The primary responsibility for regulating oil and gas activities within New York resides with the Bureau of Oil and Gas Regulation in the Division of Mineral Resources (Office of Natural Resources) of the New York State Department of Environmental Conservation (NYSDEC). Other offices and divisions within the NYSDEC administer the major environmental protection laws. Contact New York State Department of Environmental Conservation Division of Mineral Resources Bureau of Oil and Gas Regulation 625 Broadway, 3rd Floor Albany, NY 12233-6500 (518) 402-8056 (phone) (518) 402-8060 (fax) Disposal Practices and Applicable Regulations Environmental conservation rules and regulations are contained in Title 6 of the Official Compilation of Codes, Rules and Regulations of the State of New York (6 NYCRR). The rules and regulations for oil, gas and solution mining are provided in 6 NYCRR Parts 550-559.

214

Regulators, Requirements, Statutes  

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

Regulators, Requirements, Statutes Regulators, Requirements, Statutes Regulators, Requirements, Statutes The Laboratory must comply with environmental laws and regulations that apply to Laboratory operations. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email Environmental laws and regulations LANL complies with more than 30 state and federal regulations and policies designed to protect human health and the environment. Regulators Regulators Environmental Protection Agency (EPA) EPA Homepage EPA - Region VI U.S. Department of Energy (DOE) DOE Homepage DOE Environmental Policy DOE Citizen's Advisory Board U.S. Fish and Wildlife Service (FWS) Southwest Region 2 New Mexico Environment Department (NMED) NMED Homepage NMED DOE Oversight Office

215

Audio-Frequency Power Measurements  

Science Journals Connector (OSTI)

... " prepared by the National Physical Laboratory, Teddington, is a brief pamphlet dealing with "Audio-Frequency Power Measurements" (pp. 16. London: H.M.S.O., 1954; ...

1955-09-10T23:59:59.000Z

216

System and method for detection of dispersed broadband signals  

DOE Patents [OSTI]

A system and method for detecting the presence of dispersed broadband signals in real time are disclosed. The present invention utilizes a bank of matched filters for detecting the received dispersed broadband signals. Each matched filter uses a respective robust time template that has been designed to approximate the dispersed broadband signals of interest, and each time template varies across a spectrum of possible dispersed broadband signal time templates. The received dispersed broadband signal x(t) is received by each of the matched filters, and if one or more matches occurs, then the received data is determined to have signal data of interest. This signal data can then be analyzed and/or transmitted to Earth for analysis, as desired. The system and method of the present invention will prove extremely useful in many fields, including satellite communications, plasma physics, and interstellar research. The varying time templates used in the bank of matched filters are determined as follows. The robust time domain template is assumed to take the form w(t)=A(t)cos[l brace]2[phi](t)[r brace]. Since the instantaneous frequency f(t) is known to be equal to the derivative of the phase [phi](t), the trajectory of a joint time-frequency representation of x(t) is used as an approximation of [phi][prime](t). 10 figs.

Qian, S.; Dunham, M.E.

1999-06-08T23:59:59.000Z

217

System and method for detection of dispersed broadband signals  

DOE Patents [OSTI]

A system and method for detecting the presence of dispersed broadband signals in real time. The present invention utilizes a bank of matched filters for detecting the received dispersed broadband signals. Each matched filter uses a respective robust time template that has been designed to approximate the dispersed broadband signals of interest, and each time template varies across a spectrum of possible dispersed broadband signal time templates. The received dispersed broadband signal x(t) is received by each of the matched filters, and if one or more matches occurs, then the received data is determined to have signal data of interest. This signal data can then be analyzed and/or transmitted to Earth for analysis, as desired. The system and method of the present invention will prove extremely useful in many fields, including satellite communications, plasma physics, and interstellar research. The varying time templates used in the bank of matched filters are determined as follows. The robust time domain template is assumed to take the form w(t)=A(t)cos{2.phi.(t)}. Since the instantaneous frequency f(t) is known to be equal to the derivative of the phase .phi.(t), the trajectory of a joint time-frequency representation of x(t) is used as an approximation of .phi.'(t).

Qian, Shie (Austin, TX); Dunham, Mark E. (Los Alamos, NM)

1999-06-08T23:59:59.000Z

218

Type-A Arabidopsis Response Regulators Are Partially Redundant Negative Regulators of Cytokinin Signaling  

Science Journals Connector (OSTI)

...seeds were cold treated and then pretreated with fluorescent lights for 15 h first or immediately exposed to a red light-emitting diode light source (670 nm) (Quantum Devices, Barneveld, WI) filtered with bronze-tinted Plexiglass filters...

Jennifer P.C. To; Georg Haberer; Fernando J. Ferreira; Jean DeruĂšre; Michael G. Mason; G. Eric Schaller; Jose M. Alonso; Joseph R. Ecker; Joseph J. Kieber

2004-02-18T23:59:59.000Z

219

Computer Use Regulation Introduction  

E-Print Network [OSTI]

Computer Use Regulation #12;Introduction · The following training materials will reference the contents of the Computer Use Regulations, but should not serve as a substitute for reading the actual responsibilities NCSU employees have under the regulations. · North Carolina State University's computer networks

Liu, Paul

220

A high-frequency Schottky detector for use in the Tevatron  

SciTech Connect (OSTI)

A vexing problem associated with detection of Schottky signals from a bunched beam is the presence of the coherent signal, which can be 10 or more orders of magnitude greater than the Schottky signal. However, above the single-bunch cutoff frequency (SBCF), the coherent signal decays rapidly with frequency. To take advantage of this, we have constructed a Schottky detector for the Tevatron doubler to operate at roughly 2 GHz (the Tevatron SBCF is 200 to 300 MHz). To enhance signal power density, we have made the detector a high-Q (>9000) resonant rectangular cavity, which should provide a signal-to-noise-density ratio (S/N) of >10 dB for the Tevatron in the collider mode, and >20 dB in fixed target operation. The TM/sub 210/ and TM/sub 120/ modes, which are made to have slightly different frequencies, provide sensitivity to both vertical and horizontal particle motions. The 2 GHz Schottky signals are down-converted to frequencies below 100 kHz to permit analysis using a FFT spectrum analyzer. The initial installation consists of a single cavity; a second detector will be built which employs a pair of phased cavities to permit discrimination between p's and anti p's. Details of the design of both the cavity and the associated electronics are presented. The cavity is currently undergoing installation at the Tevatron.

Goldberg, D.A.; Barry, W.; Lambertson, G.R.; Voelker, F.

1987-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Robust acoustic signal detection and synchronization in a time varying ocean environment  

E-Print Network [OSTI]

Signal detection and synchronization in the time varying ocean environment is a difficult endeavor. The current common methods include using a linear frequency modulated chirped pulse or maximal length sequence as a detection ...

Gieleghem, Ryan Thomas

2012-01-01T23:59:59.000Z

222

Semiconductor optical amplifier-based heterodyning detection for resolving optical terahertz beat-tone signals from passively mode-locked semiconductor lasers  

SciTech Connect (OSTI)

An all-optical heterodyne approach based on a room-temperature controlled semiconductor optical amplifier (SOA) for measuring the frequency and linewidth of the terahertz beat-tone signal from a passively mode-locked laser is proposed. Under the injection of two external cavity lasers, the SOA acts as a local oscillator at their detuning frequency and also as an optical frequency mixer whose inputs are the self-modulated spectrum of the device under test and the two laser beams. Frequency and linewidth of the intermediate frequency signal (and therefore, the beat-tone signal) are resolved by using a photodiode and an electrical spectrum analyzer.

Latkowski, Sylwester; Maldonado-Basilio, Ramon; Carney, Kevin; Parra-Cetina, Josue; Philippe, Severine; Landais, Pascal [Research Institute for Networks and Communications Engineering, Dublin City University, Glasnevin, Dublin 9 (Ireland)

2010-08-23T23:59:59.000Z

223

Metamaterials for threat reduction applications: imaging, signal processing, and cloaking  

E-Print Network [OSTI]

Metamaterials for threat reduction applications: imaging, signal processing, and cloaking R. D effort is underway to fill this "THz gap" in view of potential threat reduction applications) and Theoretical Divisions, are exploring metamaterials-based de- vices operating at THz frequencies for threat

224

Coding of Communication Signals by Spike Synchrony and Asynchrony  

E-Print Network [OSTI]

- duces a continuous quasi-sinusoidal electric field (EOD, 600-1100Hz) which is used for both prey detection and communication. The large type-I chirps are courtship signals emit- ted by males where the EOD frequency is raised by about 600 Hz during 24 ms and the EOD amplitude is dropped by 50 Hz

Benda, Jan

225

Stabilized radio-frequency quadrupole  

DOE Patents [OSTI]

A long-vane stabilized radio frequency resonator for accelerating charged particles and including means defining a radio frequency resonator cavity, a plurality of long vanes mounted in the defining means for dividing the cavity into sections, and means interconnecting opposing ones of the plurality of vanes for stabilizing the resonator.

Lancaster, H.D.; Fugitt, J.A.; Howard, D.R.

1982-09-29T23:59:59.000Z

226

Load regulating expansion fixture  

DOE Patents [OSTI]

A free standing self contained device for bonding ultra thin metallic films, such as 0.001 inch beryllium foils is disclosed. The device will regulate to a predetermined load for solid state bonding when heated to a bonding temperature. The device includes a load regulating feature, whereby the expansion stresses generated for bonding are regulated and self adjusting. The load regulator comprises a pair of friction isolators with a plurality of annealed copper members located therebetween. The device, with the load regulator, will adjust to and maintain a stress level needed to successfully and economically complete a leak tight bond without damaging thin foils or other delicate components. 1 fig.

Wagner, L.M.; Strum, M.J.

1998-12-15T23:59:59.000Z

227

Load regulating expansion fixture  

DOE Patents [OSTI]

A free standing self contained device for bonding ultra thin metallic films, such as 0.001 inch beryllium foils. The device will regulate to a predetermined load for solid state bonding when heated to a bonding temperature. The device includes a load regulating feature, whereby the expansion stresses generated for bonding are regulated and self adjusting. The load regulator comprises a pair of friction isolators with a plurality of annealed copper members located therebetween. The device, with the load regulator, will adjust to and maintain a stress level needed to successfully and economically complete a leak tight bond without damaging thin foils or other delicate components.

Wagner, Lawrence M. (San Jose, CA); Strum, Michael J. (San Jose, CA)

1998-01-01T23:59:59.000Z

228

Elimination of Radio-Frequency Noise by Identifying and Diverting Large RF Ground Currents  

SciTech Connect (OSTI)

The problem of electromagnetic interference in scientific instruments is compounded for high-power plasma experiments by the large currents and voltages as well as by the broad bandwidths of the instruments. Ground loops are known to allow stray magnetic fields to drive large ground currents that can induce spurious signals and damage electronics. Furthermore, even when a ground loop is broken, capacitive coupling can still permit the flow of radio-frequency current, resulting in high-frequency spurious signals that can overwhelm the desired signal. We present the effects of RF ground loops on the output of vacuum photodiodes used in the Caltech Solar Loop Experiment and demonstrate the elimination of the spurious signals by diverting the ground currents away from the most vulnerable point of the signal line. Techniques for identifying the RF ground loops are also discussed. These techniques should be valuable in many high-power systems where interference from spurious coupling is an issue.

Perkins, R. J.; Bellan, P. M. [Applied Physics, California Institute of Technology (United States)

2011-12-23T23:59:59.000Z

229

A very high frequency CMOS Variable Gain Amplifier  

E-Print Network [OSTI]

of the VGA output signal . . . . . . . . . 80 Bandwidth with different frequency compensation circuits bias current at 22dB gain setting. . . 84 XIV VGA comparison . . . 88 LIST OF FIGURE FIGURE I 2", 3 and 4'" order sigma-delta modulator SNR vs. input... level . . . . Page 2 Block diagram of a direct conversion receiver. 3 Single transistor transconductor 4 Differential pair 5 Source degeneration amplifier. 6 Four-quadrant multiplier basic architectures . . . . . . . . 10 7 Multiplier as a...

Tan, Siang Tong

2012-06-07T23:59:59.000Z

230

Signal optimization at isolated intersections using pre-signals  

E-Print Network [OSTI]

INTRODUCTION Traffic at signalized intersections exhibits complex vehicle interactions, which tends to have a significant impact on traffic operations. Frustration at signalized intersections or ?stop light? as it is commonly called, often runs high... at signalized intersections in order to quantify the inefficiencies in signal operations. BACKGROUND Queue discharge plays an important role in signal operation. At the onset of green indication, the first few vehicles experience start up loss time due...

Palekar, Trishul Ajit

2006-10-30T23:59:59.000Z

231

Compact biomedical pulsed signal generator for bone tissue stimulation  

DOE Patents [OSTI]

An apparatus for stimulating bone tissue for stimulating bone growth or treating osteoporosis by applying directly to the skin of the patient an alternating current electrical signal comprising wave forms known to simulate the piezoelectric constituents in bone. The apparatus may, by moving a switch, stimulate bone growth or treat osteoporosis, as desired. Based on low-power CMOS technology and enclosed in a moisture-resistant case shaped to fit comfortably, two astable multivibrators produce the desired waveforms. The amplitude, pulse width and pulse frequency, and the subpulse width and subpulse frequency of the waveforms are adjustable. The apparatus, preferably powered by a standard 9-volt battery, includes signal amplitude sensors and warning signals indicate an output is being produced and the battery needs to be replaced.

Kronberg, J.W.

1993-06-08T23:59:59.000Z

232

Compact biomedical pulsed signal generator for bone tissue stimulation  

DOE Patents [OSTI]

An apparatus for stimulating bone tissue for stimulating bone growth or treating osteoporosis by applying directly to the skin of the patient an alternating current electrical signal comprising wave forms known to simulate the piezoelectric constituents in bone. The apparatus may, by moving a switch, stimulate bone growth or treat osteoporosis, as desired. Based on low-power CMOS technology and enclosed in a moisture-resistant case shaped to fit comfortably, two astable multivibrators produce the desired waveforms. The amplitude, pulse width and pulse frequency, and the subpulse width and subpulse frequency of the waveforms are adjustable. The apparatus, preferably powered by a standard 9-volt battery, includes signal amplitude sensors and warning signals indicate an output is being produced and the battery needs to be replaced.

Kronberg, James W. (108 Independent Blvd., Aiken, SC 29801)

1993-01-01T23:59:59.000Z

233

Chlamydomonas reinhardtii Secretes Compounds That Mimic Bacterial Signals and Interfere with Quorum  

E-Print Network [OSTI]

Chlamydomonas reinhardtii Secretes Compounds That Mimic Bacterial Signals and Interfere with Quorum reinhardtii was found to secrete substances that mimic the activity of the N-acyl-l-homoserine lactone (AHL's own AHL signals, providing evidence that the algal mimic affected quorum sensing-regulated functions

Meier, Iris

234

Calmodulin Signaling: Analysis and Prediction of a Disorder-Dependent Molecular Recognition  

E-Print Network [OSTI]

to those of intrinsically disordered proteins. These findings add to the growing list of examples in which intrinsically disordered protein regions are indicated to provide the basis for cell signaling and regulationCalmodulin Signaling: Analysis and Prediction of a Disorder-Dependent Molecular Recognition Predrag

Obradovic, Zoran

235

Intrinsic Disorder in Cell-signaling and Cancer-associated Proteins  

E-Print Network [OSTI]

Intrinsic Disorder in Cell-signaling and Cancer-associated Proteins Lilia M. Iakoucheva1 , Celeste of intrinsically disordered proteins known to be involved in cell-signaling and regulation is growing rapidly network predictor of natural disordered regions (PONDR VL-XT) to four protein datasets: human cancer

Obradovic, Zoran

236

Dual-etalon, cavity-ring-down, frequency comb spectroscopy.  

SciTech Connect (OSTI)

The 'dual etalon frequency comb spectrometer' is a novel low cost spectometer with limited moving parts. A broad band light source (pulsed laser, LED, lamp ...) is split into two beam paths. One travels through an etalon and a sample gas, while the second arm is just an etalon cavity, and the two beams are recombined onto a single detector. If the free spectral ranges (FSR) of the two cavities are not identical, the intensity pattern at the detector with consist of a series of heterodyne frequencies. Each mode out of the sample arm etalon with have a unique frequency in RF (radio-frequency) range, where modern electronics can easily record the signals. By monitoring these RF beat frequencies we can then determine when an optical frequencies is absorbed. The resolution is set by the FSR of the cavity, typically 10 MHz, with a bandwidth up to 100s of cm{sup -1}. In this report, the new spectrometer is described in detail and demonstration experiments on Iodine absorption are carried out. Further we discuss powerful potential next generation steps to developing this into a point sensor for monitoring combustion by-products, environmental pollutants, and warfare agents.

Strecker, Kevin E.; Chandler, David W.

2010-10-01T23:59:59.000Z

237

Arnold tongues for a resonant injection-locked frequency divider: analytical and numerical results  

E-Print Network [OSTI]

In this paper we consider a resonant injection-locked frequency divider which is of interest in electronics, and we investigate the frequency locking phenomenon when varying the amplitude and frequency of the injected signal. We study both analytically and numerically the structure of the Arnold tongues in the frequency-amplitude plane. In particular, we provide exact analytical formulae for the widths of the tongues, which correspond to the plateaux of the devil's staircase picture. The results account for numerical and experimental findings presented in the literature for special driving terms and, additionally, extend the analysis to a more general setting.

Bartuccelli, Michele V; Gentile, Guido; Schilder, Frank

2009-01-01T23:59:59.000Z

238

rf Plasma Heating in a Mirror Machine at Frequencies near the Ion Cyclotron Frequency and its Harmonics  

Science Journals Connector (OSTI)

By applying 75 kW of pulsed rf power to a decaying hydrogen plasma following turbulent heating, we have maintained a plasma density of 1012 to 5 Ś 1012 cm-3 for the 600-? sec duration of the rf pulse. Neutral energy analyzer measurements of ion temperature indicate Ti?100 eV, while diamagnetic loop measurements indicate 100 eVrf signals near the harmonics of the ion cyclotron frequency.

D. G. Swanson; R. W. Clark; P. Korn; S. Robertson; C. B. Wharton

1972-04-17T23:59:59.000Z

239

Chemical Signals Production  

E-Print Network [OSTI]

Chemical Signals · Types · Production · Transmission · Reception · Reading: Ch 10 except boxes 10.1 and 10.2 #12;What is chemical communication? · Movement of molecules from sender to receiver · Methods compounds are volatile. - 5-20 carbon compounds - carbon (MW=12) + hydrogen is less dense than oxygen (MW

Wilkinson, Gerald S.

240

In situ analysis of free radicals from the photodecomposition of hydrogen peroxide using a frequency-mixing magnetic detector  

SciTech Connect (OSTI)

We present an analytical method for the real-time detection of free radicals from the photodecomposition (ultraviolet radiation, {lambda} = 254 nm) of hydrogen peroxide (H{sub 2}O{sub 2}) using frequency-mixing magnetic detection. We monitored the free radicals in situ without catalysts or probe molecules. Both water and H{sub 2}O{sub 2} produced frequency-mixing signals under UV radiation, but the water signal was much weaker. The root mean square amplitude of the frequency-mixing signal was found to depend on the initial H{sub 2}O{sub 2} concentration. Considering the physical properties of the reactants, the frequency-mixing signal is attributed to the generation of paramagnetic free radicals by the photodecomposition of H{sub 2}O{sub 2}.

Hong, Hyobong; Song, Kibong [IT Convergence Service Core Research Team, Electronics and Telecommunications Research Institute, Daejeon 305-700 (Korea, Republic of); Krause, Hans-Joachim [Peter Gruenberg Institute (PGI-8), Forschungszentrum Juelich, D-52425 Juelich (Germany); Choi, Chel-Jong [School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University, Jeonju 561-756 (Korea, Republic of); Department of BIN Fusion Technology, Chonbuk National University, Jeonju 561-756 (Korea, Republic of)

2012-07-30T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Alabama State Regulations  

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

State Regulations » Alabama State Regulations » Alabama State Regulations: Alabama State of Alabama The State Oil and Gas Board of Alabama, under the direction of the State Geologist and Oil and Gas Supervisor, is responsible for the regulation of oil and gas operations. The Board is divided into two administrative regions-north and south. The Board has broad authority in Alabama's oil and gas conservation statutes to promulgate and enforce rules and regulations to ensure the conservation and proper development of Alabama's petroleum resources. A major duty of the Board is to prevent pollution of fresh water supplies by oil, gas, salt water, or other contaminants resulting from oil and gas operations. The Alabama Department of Environmental Management (ADEM) administers the major federal environmental protection laws through regulations governing air pollution, water quality and supply, solid and hazardous waste management.

242

Pressure reducing regulator  

DOE Patents [OSTI]

A pressure reducing regulator that controls its downstream or outlet pressure to a fixed fraction of its upstream or inlet pressure is disclosed. The regulator includes a housing which may be of a titanium alloy, within which is located a seal or gasket at the outlet end which may be made of annealed copper, a rod, and piston, each of which may be made of high density graphite. The regulator is insensitive to temperature by virtue of being without a spring or gas sealed behind a diaphragm, and provides a reference for a system in which it is being used. The rod and piston of the regulator are constructed, for example, to have a 1/20 ratio such that when the downstream pressure is less than 1/20 of the upstream pressure the regulator opens and when the downstream pressure exceeds 1/20 of the upstream pressure the regulator closes. 10 figs.

Whitehead, J.C.; Dilgard, L.W.

1995-10-10T23:59:59.000Z

243

TOWARD MORE EFFECTIVE REGULATION  

SciTech Connect (OSTI)

This paper proposes a model relationship between the operator engaged in a hazardous activity, the regulator of that activity, and the general public. The roles and responsibilities of each entity are described in a way that allows effective communication flow. The role of the regulator is developed using the steam boiler as an example of a hazard subject to regulation; however, the model applies to any regulated activity. In this model the safety analyst has the extremely important role of communicating sometimes difficult technical information to the regulator in a way that the regulator can provide credible assurance to the general public as to the adequacy of the control of the hazardous activity. The conclusion asserts that acceptance of the model, understanding of the roles and responsibilities and definition of who communicates what information to whom will mitigate frustration on the part of each of the three entities.

J. GRAF

2000-06-01T23:59:59.000Z

244

SEARCHES FOR HIGH-FREQUENCY VARIATIONS IN THE {sup 8}B SOLAR NEUTRINO FLUX AT THE SUDBURY NEUTRINO OBSERVATORY  

SciTech Connect (OSTI)

We have performed three searches for high-frequency signals in the solar neutrino flux measured by the Sudbury Neutrino Observatory, motivated by the possibility that solar g-mode oscillations could affect the production or propagation of solar {sup 8}B neutrinos. The first search looked for any significant peak in the frequency range 1-144 day{sup -1}, with a sensitivity to sinusoidal signals with amplitudes of 12% or greater. The second search focused on regions in which g-mode signals have been claimed by experiments aboard the Solar and Heliospheric Observatory satellite, and was sensitive to signals with amplitudes of 10% or greater. The third search looked for extra power across the entire frequency band. No statistically significant signal was detected in any of the three searches.

Aharmim, B.; Chauhan, D. [Department of Physics and Astronomy, Laurentian University, Sudbury, ON P3E 2C6 (Canada); Ahmed, S. N.; Boulay, M. G.; Cai, B.; Chen, M.; Dai, X. [Department of Physics, Queen's University, Kingston, ON K7L 3N6 (Canada); Anthony, A. E. [Department of Physics, University of Texas at Austin, Austin, TX 78712-0264 (United States); Barros, N. [Laboratorio de Instrumentacao e Fisica Experimental de PartIculas, Av. Elias Garcia 14, 1, 1000-149 Lisboa (Portugal); Beier, E. W.; Deng, H. [Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104-6396 (United States); Bellerive, A.; Boudjemline, K. [Ottawa-Carleton Institute for Physics, Department of Physics, Carleton University, Ottawa, ON K1S 5B6 (Canada); Beltran, B. [Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2R3 (Canada); Bergevin, M.; Chan, Y. D. [Institute for Nuclear and Particle Astrophysics and Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Biller, S. D.; Cleveland, B. T. [Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH (United Kingdom); Burritt, T. H.; Cox, G. A. [Center for Experimental Nuclear Physics and Astrophysics, and Department of Physics, University of Washington, Seattle, WA 98195 (United States)

2010-02-10T23:59:59.000Z

245

Microwave and Radio Frequency Workshop  

Broader source: Energy.gov [DOE]

At the Microwave and Radio Frequency Workshop (held in Long Beach, CA, on July 25, 2012), academic and industry experts discussed the existing and emerging electrotechnologies – such as microwave ...

246

AUTO ID FUTURE - FREQUENCY AGNOSTIC  

E-Print Network [OSTI]

Identification of information is one key to the development of intelligent decision systems of the future. Frequency agnostic automatic identification is only one step in the physical world to make physical objects identify ...

DATTA, SHOUMEN

247

Tidal Wetlands Regulations (Connecticut)  

Broader source: Energy.gov [DOE]

Most activities occurring in or near tidal wetlands are regulated, and this section contains information on such activities and required permit applications for proposed activities. Applications...

248

Air-Quality Regulations  

Science Journals Connector (OSTI)

n...Federal, state and/or local regulations constructed for the purpose of protecting air quality, e.g., low volatile organic compounds...

Jan W. Gooch

2011-01-01T23:59:59.000Z

249

Air-quality regulations  

Science Journals Connector (OSTI)

n....Federal, state and/or local regulations constructed for the purpose of protecting air quality, e.g., low volatile organic compounds...

2007-01-01T23:59:59.000Z

250

Ethylene Interacts with Abscisic Acid to Regulate Endosperm Rupture during Germination: A Comparative Approach Using  

E-Print Network [OSTI]

Ethylene Interacts with Abscisic Acid to Regulate Endosperm Rupture during Germination relatives Lepidium sativum and Arabidopsis thaliana showing that ethylene biosynthesis and signaling, and transcriptome analyses. We show that ethylene promotes endosperm cap weakening of Lepidium and endosperm rupture

Leubner, Gerhard

251

Central Cell–Derived Peptides Regulate Early Embryo Patterning in Flowering Plants  

Science Journals Connector (OSTI)

...Commun. 2 , 512 ( 2011 ). 10.1038/ncomms1520 22027592 22 Beets I. Janssen T. Meelkop E. Temmerman L. Suetens N. Rademakers S. Jansen G. Schoofs L. , Vasopressin/oxytocin-related signaling regulates gustatory associative learning in C. elegans...

Liliana M. Costa; Eleanor Marshall; Mesfin Tesfaye; Kevin A. T. Silverstein; Masashi Mori; Yoshitaka Umetsu; Sophie L. Otterbach; Ranjith Papareddy; Hugh G. Dickinson; Kim Boutiller; Kathryn A. VandenBosch; Shinya Ohki; José F. Gutierrez-Marcos

2014-04-11T23:59:59.000Z

252

Tailpulse signal generator  

DOE Patents [OSTI]

A tailpulse signal generating/simulating apparatus, system, and method designed to produce electronic pulses which simulate tailpulses produced by a gamma radiation detector, including the pileup effect caused by the characteristic exponential decay of the detector pulses, and the random Poisson distribution pulse timing for radioactive materials. A digital signal process (DSP) is programmed and configured to produce digital values corresponding to pseudo-randomly selected pulse amplitudes and pseudo-randomly selected Poisson timing intervals of the tailpulses. Pulse amplitude values are exponentially decayed while outputting the digital value to a digital to analog converter (DAC). And pulse amplitudes of new pulses are added to decaying pulses to simulate the pileup effect for enhanced realism in the simulation.

Baker, John (Walnut Creek, CA); Archer, Daniel E. (Knoxville, TN); Luke, Stanley John (Pleasanton, CA); Decman, Daniel J. (Livermore, CA); White, Gregory K. (Livermore, CA)

2009-06-23T23:59:59.000Z

253

2012 CERTS LAAR Program Peer Review - Frequency Responsive Load Evaluation and Benefits - Isabelle Snyder, ORNL  

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

Frequency responsive loads Isabelle Snyder, Ph.D. Power and Energy Systems Group ORNL 2 Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Project objective * Study the use of load for frequency regulation: - Identify frequency measurement accuracies based on different approaches - Identify accuracy requirement for frequency responsive load applications - Study the impact of frequency responsive loads on a large system (ERCOT or EI) 3 Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Major technical accomplishments: overview * Identified requirements of measurement devices to satisfy accuracy requirements for frequency measurement * Initiated request for ERCOT and EI models: - ERCOT (market participant's concern about releasing ERCOT

254

Photonic Radio-Frequency Phase Detector based on Radio-Frequency to Intermediate-Frequency Phase Mapping  

Science Journals Connector (OSTI)

A photonic radio-frequency phase detector based on radio-frequency (RF) to intermediate-frequency mapping is demonstrated, and the theoretical principle of the design is explained.

Sun, Dongning; Dong, Yi; Wang, Siwei; Xia, Zongyang; Xie, Weilin; Shi, Hongxiao; Yi, Lilin; Hu, Weisheng

255

Escape Time of Josephson Junctions for Signal Detection  

E-Print Network [OSTI]

In this Chapter we investigate with the methods of signal detection the response of a Josephson junction to a perturbation to decide if the perturbation contains a coherent oscillation embedded in the background noise. When a Josephson Junction is irradiated by an external noisy source, it eventually leaves the static state and reaches a steady voltage state. The appearance of a voltage step allows to measure the time spent in the metastable state before the transition to the running state, thus defining an escape time. The distribution of the escape times depends upon the characteristics of the noise and the Josephson junction. Moreover, the properties of the distribution depends on the features of the signal (amplitude, frequency and phase), which can be therefore inferred through the appropriate signal processing methods. Signal detection with JJ is interesting for practical purposes, inasmuch as the superconductive elements can be (in principle) cooled to the absolute zero and therefore can add (in practi...

Addesso, P; Pierro, V

2014-01-01T23:59:59.000Z

256

Voltage Regulator Chip: Power Supplies on a Chip  

SciTech Connect (OSTI)

ADEPT Project: CPES at Virginia Tech is finding ways to save real estate on a computer's motherboard that could be used for other critical functions. Every computer processor today contains a voltage regulator that automatically maintains a constant level of electricity entering the device. These regulators contain bulky components and take up about 30% of a computer's motherboard. CPES at Virginia Tech is developing a voltage regulator that uses semiconductors made of gallium nitride on silicon (GaN-on-Si) and high-frequency soft magnetic material. These materials are integrated on a small, 3D chip that can handle the same amount of power as traditional voltage regulators at 1/10 the size and with improved efficiency. The small size also frees up to 90% of the motherboard space occupied by current voltage regulators.

None

2010-09-01T23:59:59.000Z

257

Frequency Control Of Micro Hydro Power Plant Using Electronic Load Controller  

E-Print Network [OSTI]

Water turbines, like petrol or diesel engines, will vary in speed as load is applied or relieved. Although not such a great problem with machinery which uses direct shaft power, this speed variation will seriously affect both frequency and voltage output from a generator. Traditionally, complex hydraulic or mechanical speed governors altered flow as the load varied, but more recently an electronic load controller (ELC) has been developed which has increased the simplicity and reliability of modern micro-hydro sets. An ELC is a solid-state electronic device designed to regulate output power of a micro-hydropower system and maintaining a near-constant load on the turbine generates stable voltage and frequency. In this paper an ELC constantly senses and regulates the generated frequency. The frequency is directly proportional to the speed of the turbine.

unknown authors

258

Exposure setup to study potential adverse effects at GSM 1800 and UMTS frequencies on the auditory systems of rats  

Science Journals Connector (OSTI)

......frequency of operation were set by keyboard-input...frequency of operation. The signal...four-channel power divider was used...the exposure system as well as the...Postow, E. Handbook of Biological...inner auditory system of Sprague-Dawley...electromagnetic power absorption induced......

V. Lopresto; R. Pinto; A. De Vita; S. Mancini; P. Galloni; C. Marino; P. Ravazzani; G. A. Lovisolo

2007-03-01T23:59:59.000Z

259

Systems for low frequency seismic and infrasound detection of geo-pressure transition zones  

DOE Patents [OSTI]

Methods for determining the existence and characteristics of a gradational pressurized zone within a subterranean formation are disclosed. One embodiment involves employing an attenuation relationship between a seismic response signal and increasing wavelet wavelength, which relationship may be used to detect a gradational pressurized zone and/or determine characteristics thereof. In another embodiment, a method for analyzing data contained within a response signal for signal characteristics that may change in relation to the distance between an input signal source and the gradational pressurized zone is disclosed. In a further embodiment, the relationship between response signal wavelet frequency and comparative amplitude may be used to estimate an optimal wavelet wavelength or range of wavelengths used for data processing or input signal selection. Systems for seismic exploration and data analysis for practicing the above-mentioned method embodiments are also disclosed.

Shook, G. Michael (Idaho Falls, ID); LeRoy, Samuel D. (Houston, TX); Benzing, William M. (Tulsa, OK)

2007-10-16T23:59:59.000Z

260

Frequency stability considerations in the design of battery-powered VHF transmitters  

E-Print Network [OSTI]

Klughart, S, B. , Massachusetts Institute of Technology Chair of Advisory Committee: Dr. Edgar Sanchez-Sinencio Traditional VHF transmitter oscillators operating in the 50-100 MHz frequency range have as their power source a regulated power supply with a..., the variation in pawer supply voltage and non-zero battery supply source resistance are of greater impact on oscillator frequency stability than temperature variations. The major mechanisms which contribute to this &equency drift are due to changes in active...

Klughart, Kevin Mark

1992-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Dendritic Ca2 -Activated K Conductances Regulate Electrical  

E-Print Network [OSTI]

Dendritic Ca2 -Activated K Conductances Regulate Electrical Signal Propagation in an Invertebrate studies revealed that backpropagating Na spikes and synaptically evoked EPSPs caused Ca2 entry through low-voltage-activated Ca2 channels that are distrib- uted throughout the neurites. Voltage-clamp recordings from the soma

Wessel, Ralf

262

Cytosolic Ca2+ ions regulate numerous aspects of cellular  

E-Print Network [OSTI]

Cytosolic Ca2+ ions regulate numerous aspects of cellular activity in virtually all cell types (Berridge et al. 2000). This versatility is made possible by the diverse mechanisms by which Ca2+ signals; Marchant & Parker, 2000). Endogenous Ca2+ binding proteins play a key role in determining the magnitude

Parker, Ian

263

High-frequency resonances in photorefractive crystals  

Science Journals Connector (OSTI)

Two-wave mixing in photorefractive materials is investigated for the case of applied dc electric fields and large detuning frequencies and for high-frequency alternating electric...

Grunnet-Jepsen, A; Aubrecht, I; Solymar, L

1995-01-01T23:59:59.000Z

264

Sum Frequency Generation for Surface Vibrational Spectroscopy...  

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

Sum Frequency Generation for Surface Vibrational Spectroscopy Sum Frequency Generation for Surface Vibrational Spectroscopy This customized SFG-VS spectrometer incorporates unique...

265

Method and apparatus for powering an electrodeless lamp with reduced radio frequency interference  

DOE Patents [OSTI]

An electrodeless lamp waveguide structure includes tuned absorbers for spurious RF signals. A lamp waveguide with an integral frequency selective attenuation includes resonant absorbers positioned within the waveguide to absorb spurious out-of-band RF energy. The absorbers have a negligible effect on energy at the selected frequency used to excite plasma in the lamp. In a first embodiment, one or more thin slabs of lossy magnetic material are affixed to the sidewalls of the waveguide at approximately one quarter wavelength of the spurious signal from an end wall of the waveguide. The positioning of the lossy material optimizes absorption of power from the spurious signal. In a second embodiment, one or more thin slabs of lossy magnetic material are used in conjunction with band rejection waveguide filter elements. In a third embodiment, one or more microstrip filter elements are tuned to the frequency of the spurious signal and positioned within the waveguide to couple and absorb the spurious signal's energy. All three embodiments absorb negligible energy at the selected frequency and so do not significantly diminish the energy efficiency of the lamp.

Simpson, James E. (Gaithersburg, MD)

1999-01-01T23:59:59.000Z

266

Method and apparatus for powering an electrodeless lamp with reduced radio frequency interference  

DOE Patents [OSTI]

An electrodeless lamp waveguide structure includes tuned absorbers for spurious RF signals. A lamp waveguide with an integral frequency selective attenuation includes resonant absorbers positioned within the waveguide to absorb spurious out-of-band RF energy. The absorbers have a negligible effect on energy at the selected frequency used to excite plasma in the lamp. In a first embodiment, one or more thin slabs of lossy magnetic material are affixed to the sidewalls of the waveguide at approximately one quarter wavelength of the spurious signal from an end wall of the waveguide. The positioning of the lossy material optimizes absorption of power from the spurious signal. In a second embodiment, one or more thin slabs of lossy magnetic material are used in conjunction with band rejection waveguide filter elements. In a third embodiment, one or more microstrip filter elements are tuned to the frequency of the spurious signal and positioned within the waveguide to couple and absorb the spurious signal's energy. All three embodiments absorb negligible energy at the selected frequency and so do not significantly diminish the energy efficiency of the lamp. 18 figs.

Simpson, J.E.

1999-06-08T23:59:59.000Z

267

Cell cycle regulators in the control of Emilie Blanchet, Jean-Sbastien Annicotte, and Lluis Fajas*  

E-Print Network [OSTI]

in the regulation of glucose-induced insulin secretion. There is enough evidence to indicate that the CDK4-pRB-E2F1 cycle regulators in lipids and adipocytes metabolism Lipids metabolism not only consists on lipid synthesis and degradation, but also on lipid signaling, and fatty acid storage in adipose tissue

Paris-Sud XI, Université de

268

Indiana State Regulations  

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

Indiana Indiana State Regulations: Indiana State of Indiana The Indiana Department of Natural Resources (DNR) Division of Oil and Gas regulates petroleum exploration, production, and site abandonment activities, underground injection control, test hole drilling, and geophysical surveying operations. Otherwise, the Indiana Department of Environmental Management (IDEM) administers the major environmental protection laws. Contact Division of Oil and Gas (Indianapolis Central Office) 402 West Washington Street, Room 293 Indianapolis, IN 46204 (317) 232-4055 (phone) (317) 232-1550 (fax) (Division Contacts) Indiana Department of Environmental Management P.O. Box 6015 Indianapolis, IN 46206-6015 (317) 232-8603 (phone) (317) 233-6647 (fax) Disposal Practices and Applicable Regulations

269

Generation of very high-frequency waves by up-conversion in a plasma-loaded free-electron laser  

Science Journals Connector (OSTI)

A free-electron laser loaded with a plasma is able to resonate at two different frequencies. The two waves are copropagating, one with positive slippage while the other has negative slippage. We deduce the nonlinear partial differential equations describing the interaction between the two waves in the slowly-varying-envelope approximation. By injecting a signal at the low frequency, a strong signal is produced at the harmonically related high frequency, with a lethargy time much smaller than that of the spontaneous vacuum emission. This effect could be applied in the generation of very short wavelength radiation, up to the range of hard x rays.

V. Petrillo and C. Maroli

2000-12-01T23:59:59.000Z

270

Generation of ultrahigh frequency air microplasma in a magnetic loop and effects of pulse modulation on operation  

SciTech Connect (OSTI)

An atmospheric pressure air microplasma (APAMP) source was developed under ambient conditions using a magnetic loop at an operating frequency of 740 MHz. A self-igniting, stable APAMP was generated at 9.5 W. Pulse modulation (PM) was applied to the ultra high frequency signal. The effects of PM on self-ignition and operation of the APAMP source were studied by using a square wave modulating signal in the frequency range of 5-30 KHz. With the application of PM on the APAMP, in the best case, the plasma self-ignites and is sustained at 2.5 W.

Taghioskoui, Mazdak; Perlow, Joshua; Zaghloul, Mona [Department of Electrical and Computer Engineering, George Washington University, Washington, DC 20052 (United States); Montaser, Akbar [Department of Chemistry, George Washington University, Washington, DC 20052 (United States)

2010-05-10T23:59:59.000Z

271

Improved real-time method for noise reduction of directional Doppler audio signals  

Science Journals Connector (OSTI)

A noise reduction filter for Doppler audio signals is one important part of Transcranial Doppler ultrasound system. Several studies have been carried out for low-pass filter with fixed value for Doppler audio signals; however, most of these studies lacked complex research works and few studies analyzed the relationship of both parts of spectrum signal processing and audio signal processing. To solve the above-mentioned concern, this research is focused on the algorithms of de-noising and enveloping of spectrum signal processing part and improved new real-time method, which reduces the noise using low-pass filter with a variable threshold value based on maximum frequency of spectrum signals. The noise of Doppler audio signals was reduced efficiently by using this algorithm.

Erdenedalai Naranchimeg; Byambasuren Bat-Erdene; Seung-Moo Han

2012-01-01T23:59:59.000Z

272

Intelligent Radio Frequency (RF) Monitoring  

E-Print Network [OSTI]

? Intelligent Radio Frequency (RF) Monitoring ? 2009 Armstrong International, Inc. www.armstronginternational.com 2 ?Expect many enjoyable experiences!? David M. Armstrong Present Process Challenges ? Identifying a failure ? Procedure.... Armstrong Steam Trap Challenges ? Identifying a failure ? Manpower ? Location ? Magnitude of failure ? Energy loss ? Loss of heat transfer ? Justification for repair ? ?Speed of Implementation? ? Environmental concerns Manpower Location 4...

Kimbrough, B.

273

Interviewee Travel Regulations Scope  

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

3/2012 3/2012 Interviewee Travel Regulations Scope These regulations apply to the reimbursement of round-trip travel expenses incurred by interviewees. These regulations do not apply to applicants who live within a 50-mile radius of Los Alamos based on the Rand McNally Standard Highway Mileage Guide. Reimbursement With the exception of airfare, interviewees will be reimbursed for travel expenses according to Federal travel regulations. For interviewees, airfare reimbursement is limited to the lesser of the standard coach airfare or the actual amount paid. The lowest available airfare should be obtained based on the official business dates and locations. The reimbursement amount will be based on the most direct route available between the interviewee's residence and the laboratory. Costs incurred over the lowest available fare will be the

274

New Mexico State Regulations  

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

New Mexico New Mexico State Regulations: New Mexico State of New Mexico The Oil Conservation Division (OCD) in the New Mexico Energy, Minerals and Natural Resources Department regulates oil and gas and geothermal operations in New Mexico. The OCD has the responsibility to gather oil and gas production data, permit new wells, establish pool rules and oil and gas allowables, issue discharge permits, enforce rules and regulations of the division, monitor underground injection wells and ensure that abandoned wells are properly plugged and the land is responsibly restored. Otherwise, the New Mexico Environment Department (NMED) administers the major environmental protection laws. The Water Quality Control Commission (WQCC), which is administratively attached to the NMED, assigns responsibility for administering its regulations to constituent agencies, including the OCD.

275

GUIDANCE REGARDING NEPA REGULATIONS  

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

This memorandum was published in the Federal Register and appears at 48 Fed. Reg. 34263 (1983). Ed. Note] This memorandum was published in the Federal Register and appears at 48 Fed. Reg. 34263 (1983). Ed. Note] GUIDANCE REGARDING NEPA REGULATIONS 40 CFR Part 1500 Executive Office of the President Council on Environmental Quality 722 Jackson Place, N.W. Washington, D.C. 20006 July 22, 1983 Memorandum For: Heads of Federal Agencies From: A. Alan Hill, Chairman Re: Guidance Regarding NEPA Regulations The Council on Environmental Quality (CEQ) regulations implementing the National Environmental Policy Act (NEPA) were issued on November 29, 1978. These regulations became effective for, and binding upon, most federal agencies on July 30, 1979, and for all remaining federal agencies on November 30, 1979. As part of the Council's NEPA oversight responsibilities it solicited through an August 14,

276

Virginia State Regulations  

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

Virginia Virginia State Regulations: Virginia State of Virginia The Division of Gas and Oil in the Virginia Department of Mines, Minerals and Energy (DMME) regulates the effects of gas and oil operations both on and below the surface. The Virginia Gas and Oil Board is to foster, encourage, and promote the safe and efficient exploration for and development, production, and utilization of gas and oil resources. Otherwise, three regulatory citizen boards are responsible for adopting Virginia 's environmental regulations. The Virginia Department of Environmental Quality (DEQ) staff administers the regulations as approved by the boards. Finally, the U.S. Environmental Protection Agency (EPA) Region 3, through its Water Protection Division, administers Class II underground injection control (UIC) programs in Virginia in direct implementation.

277

California Energy Commission REGULATIONS  

E-Print Network [OSTI]

California Energy Commission REGULATIONS NONRESIDENTIAL BUILDING ENERGY Office Manager High Performance Buildings and Standards Development Office Dave Ashuckian Deputy Director Efficiency and Renewable Energy Division Robert Oglesby Executive Director DISCLAIMER

278

A Furnace Temperature Regulator  

Science Journals Connector (OSTI)

Synopsis.—By making the heating coil of an electric furnace one arm of a wheatstone bridge, and combining this with a galvanometer regulator, thus keeping constant the resistance of the coil, we can, regardless of variations in the current supply, and with no attention, maintain constant the temperature of furnaces not too directly influenced by the temperature of the room, or where the surrounding air is kept constant. The power available in this regulator is relatively very great indeed; nothing has to be inserted within the furnace cavity, and the lag is practically nothing; the regulator is often almost at its best under conditions most unfavorable to other regulators. It has held a small furnace constant to 0.1° for hours at temperatures from 500° to 1400°.

Walter P. White and Leason H. Adams.

1919-07-01T23:59:59.000Z

279

System and method for investigating sub-surface features of a rock formation with acoustic sources generating coded signals  

DOE Patents [OSTI]

A system and a method for investigating rock formations includes generating, by a first acoustic source, a first acoustic signal comprising a first plurality of pulses, each pulse including a first modulated signal at a central frequency; and generating, by a second acoustic source, a second acoustic signal comprising a second plurality of pulses. A receiver arranged within the borehole receives a detected signal including a signal being generated by a non-linear mixing process from the first-and-second acoustic signal in a non-linear mixing zone within the intersection volume. The method also includes-processing the received signal to extract the signal generated by the non-linear mixing process over noise or over signals generated by a linear interaction process, or both.

Vu, Cung Khac; Nihei, Kurt; Johnson, Paul A; Guyer, Robert; Ten Cate, James A; Le Bas, Pierre-Yves; Larmat, Carene S

2014-12-30T23:59:59.000Z

280

A double-frequency dwarf nova oscillation  

E-Print Network [OSTI]

We have detected coherent oscillations (``dwarf nova oscillations'') in Hubble Space Telescope spectra of the dwarf nova OY Car. The oscillations were seen towards the end of a superoutburst of OY Car. The oscillations are extraordinary compared to the many other examples in the literature for two reasons. First, their amplitude is large, with a peak-to-peak variation of 8 to 20% of the total flux over the range 1100 to 2500A. However, most remarkably we find that there are two components present simultaneously. Both have periods close to 18sec (equivalent to 4800 cycles/day) but they are separated by 57.7+/-0.5 cycles/day. The lower frequency component of the pair has a strong second harmonic while its companion, which has about twice its amplitude, does not. The oscillation spectra appear hotter than the mean spectrum and approximately follow the continuum distribution of a black-body with a temperature in the range 30,000 to 50,000K. We tentatively suggest that the weaker non-sinusoidal component could represent the rotation of the white dwarf, although we have been unable to recover any such signal in quiescent data.

T. R. Marsh; Keith Horne

1998-06-02T23:59:59.000Z

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


281

A chip-scale, telecommunications-band frequency conversion interface for quantum emitters  

E-Print Network [OSTI]

We describe a chip-scale frequency conversion interface designed for connecting photons generated by single quantum emitters to the 1550 nm telecommunications band. Four-wave-mixing Bragg scattering in silicon nitride waveguides is used to demonstrate frequency upconversion and downconversion between the 980 nm and 1550 nm wavelength regions, with signal-to-background levels > 10. Finite element simulations and the split-step Fourier method are used to develop waveguide designs that can connect shorter wavelength (637 nm to 852 nm) quantum emitters with 1550 nm. Finally, the conditions for achieving the conversion efficiencies needed for practical demonstrations of frequency conversion of quantum states of light are discussed.

Agha, Imad; Davanco, Marcelo; Srinivasan, Kartik

2013-01-01T23:59:59.000Z

282

Theory of parametric frequency down conversion of light  

Science Journals Connector (OSTI)

A theoretical study is made of the process in which incident pump photons that interact with a nonlinear medium (such as a crystal lacking inversion symmetry) are spontaneously split into lower-frequency signal and idler photons. The down-converted fields are quantized and described by a continuum of modes, a subset of which interacts with each photodetector. It is shown that when two ideal photodetectors are appropriately located so that they receive the conjugate signal and idler photons, then the joint probability of two-photon detection by the two detectors can equal the single-photon detection probability. The time correlation between the two detected photons is shown to be limited either by the resolving time of the detectors, or by the bandwidth of the down-converted light, and to be independent of the coherence time of the pump field or of the length of the nonlinear medium. These conclusions are compared with the results of recent experiments.

C. K. Hong and L. Mandel

1985-04-01T23:59:59.000Z

283

Rap G protein signal in normal and disordered lymphohematopoiesis  

SciTech Connect (OSTI)

Rap proteins (Rap1, Rap2a, b, c) are small molecular weight GTPases of the Ras family. Rap G proteins mediate diverse cellular events such as cell adhesion, proliferation, and gene activation through various signaling pathways. Activation of Rap signal is regulated tightly by several specific regulatory proteins including guanine nucleotide exchange factors and GTPase-activating proteins. Beyond cell biological studies, increasing attempts have been made in the past decade to define the roles of Rap signal in specific functions of normal tissue systems as well as in cancer. In the immune and hematopoietic systems, Rap signal plays crucial roles in the development and function of essentially all lineages of lymphocytes and hematopoietic cells, and importantly, deregulated Rap signal may lead to unique pathological conditions depending on the affected cell types, including various types of leukemia and autoimmunity. The phenotypical studies have unveiled novel, even unexpected functional aspects of Rap signal in cells from a variety of tissues, providing potentially important clues for controlling human diseases, including malignancy.

Minato, Nagahiro, E-mail: minato@imm.med.kyoto-u.ac.jp

2013-09-10T23:59:59.000Z

284

Optimized Sampling Frequencies for Weld Reliability Assessments of Long Pipeline Segments  

E-Print Network [OSTI]

. To be on the safe side, regulations require that a pipeline be repaired when it is possible that p â?? p 0 , i.e., when p â?? p 0 . Need for Optimal Resource Allocation for Pipeline As­ sessment: Pipeline repairsOptimized Sampling Frequencies for Weld Reliability Assessments of Long Pipeline Segments Cesar J

Kreinovich, Vladik

285

Optimized Sampling Frequencies for Weld Reliability Assessments of Long Pipeline Segments  

E-Print Network [OSTI]

. To be on the safe side, regulations require that a pipeline be repaired when it is possible that p p0, i.e., when p p0. Need for Optimal Resource Allocation for Pipeline As- sessment: Pipeline repairs are extremelyOptimized Sampling Frequencies for Weld Reliability Assessments of Long Pipeline Segments Cesar J

Kreinovich, Vladik

286

Digital Frequency Domain Multiplexer for mm-Wavelength Telescopes  

SciTech Connect (OSTI)

An FPGA based digital signal processing (DSP) system for biasing and reading out multiplexed bolometric detectors for mm-wavelength telescopes is presented. This readout system is being deployed for balloon-borne and ground based cosmology experiments with the primary goal of measuring the signature of inflation with the Cosmic Microwave Background Radiation. The system consists of analog superconducting electronics running at 250 mK and 4 K, coupled to digital room temperature backend electronics described here. The digital electronics perform the real time functionality with DSP algorithms implemented in firmware. A soft embedded processor provides all of the slow housekeeping control and communications. Each board in the system synthesizes multi-frequency combs of 8 to 32 carriers in the MHz band to bias the detectors. After the carriers have been modulated with the sky-signal by the detectors, the same boards digitize the comb directly. The carriers are mixed down to base-band and low pass filtered. The signal bandwidth of 0.050Hz-100 Hz places extreme requirements on stability and requires powerful filtering techniques to recover the sky-signal from the MHz carriers.

Spieler, Helmuth G; Dobbs, Matt; Bissonnette, Eric; Spieler, Helmuth G.

2007-07-23T23:59:59.000Z

287

Reliability analysis for Atucha II reactor protection system signals  

Science Journals Connector (OSTI)

Atucha II is a 745 MW Argentine Power Nuclear Reactor constructed by ENACE SA, Nuclear Argentine Company for Electrical Power Generation and SIEMENS AG KWU, Erlangen, Germany. A preliminary modular logic analysis of RPS (Reactor Protection System) signals was performed by means of the well known Swedish professional risk and reliability software named Risk-Spectrum taking as a basis a reference signal coded as JR17ER003 which command the two moderator loops valves. From the reliability and behavior knowledge for this reference signal folloos an estimation of the reliability for the other 97 RPS signals. Because the preliminary character of this analysis Main Important Measures are not performed at this stage. Reliability is by the statistic value named unavailability predicted. The scope of this analysis is restricted from the measurement elements to the RPS buffer outputs. In the present context only one redundancy is analyzed so in the Instrumentation and Control area there no CCF (Common Cause Failures) present for signals. Finally those unavailability values could be introduced in the failure domain for the posterior complete Atucha II reliability analysis which includes all mechanical and electromechanical features. Also an estimation of the spurious frequency of RPS signals defined as faulty by no trip is performed.

Jose Luis Roca

1996-01-01T23:59:59.000Z

288

An investigation of the usefulness of extremely low-frequency electromagnetic measurements for treaty verification  

SciTech Connect (OSTI)

From FY 1986 through FY 1988, we monitored extremely low-frequency (ELF) electromagnetic (EM) fields to determine whether these signals could be detected from underground nuclear explosions. Signals clearly related to underground tests were detected only when the ELF field sensors were located within 10 km of surface ground zero. Theoretical analysis, based on the results of these measurements, shows that the ELF impulse signals from underground nuclear tests are of longer duration than those from lightning sources and are, therefore, less efficient in exciting resonances in the earth-ionosphere cavity, even though the source strength for each may be the same. Thus, ELF signals from underground nuclear tests with yields of <150 kT are generally lower than the background signals caused by worldwide lightning activity. Our conclusion is that ELF monitoring probably will not be useful for detecting underground nuclear tests at distances >10 km from the tests. 16 refs., 24 figs., 3 tabs.

Sweeney, J.J.

1989-01-01T23:59:59.000Z

289

Wyoming State Regulations  

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

Wyoming Wyoming State Regulations: Wyoming State of Wyoming The Wyoming Oil and Gas Conservation Commission (WOGCC) is the state agency authorized to regulate oil and gas exploration and production waste. The Wyoming Department of Environmental Quality (DEQ) administers general environmental protection regulations. Contact Wyoming Oil and Gas Conservation Commission 2211 King Blvd. Casper, WY 82602 (street address) P.O. Box 2640 Casper, WY 82602 (mailing address) (307) 234-7147 (phone) (307) 234-5306 (fax) Wyoming Department of Environmental Quality 122 West 25th Street, Herscheler Building Cheyenne, WY 82002 (307) 777-7937 (phone) (307) 777-7682 (fax) Disposal Practices and Applicable Regulations Document # 4855, Agency (Oil and Gas Conservation Commission), General Agency, Board or Commission Rules, Chapter 4 (Environmental Rules, Including Underground Injection Control Program Rules for Enhanced Recovery and Disposal Projects), Section 1. Pollution and Surface Damage (Forms 14A and 14B) of the Wyoming Rules and Regulations contains the environmental rules administered by the WOGCC with respect to management options for exploration and production waste.

290

Fluctuation Spectroscopy: Determination of Chemical Reaction Kinetics from the Frequency Spectrum of Fluctuations  

Science Journals Connector (OSTI)

...significantly smaller than unity. MATERIALS AND METHODS The cell The...into the cell. The cell was thor- oughly cleaned before use...function of frequency. A block diagram of the electronic circuitry...requirement imposed by the handling of small (noise) signals...

George Feher; Mike Weissman

1973-01-01T23:59:59.000Z

291

Unsupervised learning of time-frequency patches as a noise-robust representation of speech  

Science Journals Connector (OSTI)

We present a self-learning algorithm using a bottom-up based approach to automatically discover, acquire and recognize the words of a language. First, an unsupervised technique using non-negative matrix factorization (NMF) discovers phone-sized time-frequency ... Keywords: Acoustic signal analysis, Automatic speech recognition, Language acquisition, Matrix factorization, Noise robustness

Maarten Van Segbroeck; Hugo Van hamme

2009-11-01T23:59:59.000Z

292

Michigan State Regulations  

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

Michigan Michigan State Regulations: Michigan State of Michigan The Michigan Department of Environmental Quality (DEQ), through the Supervisor of Wells, Geological and Land Management Division (GLM), oversees the regulation of oil and gas activities. DEQ staff monitors the environmental impacts of well drilling operations, oil and gas production facilities, and gas storage wells. Contact Michigan Department of Environmental Quality Geological and Land Management Division P.O. Box 30256 Lansing, MI 48909-7756 (517) 241-1515 (phone) (517) 241-1601 (fax) (Organization Chart) Disposal Practices and Applicable Regulations The rules governing oil and gas operations are contained in Part 615, Rules 324.101-324.1301 (Department of Environmental Quality, Oil and Gas Operations) of the Michigan Administrative Code.

293

Pressure-induced OH frequency downshift in brucite: frequency-distance and frequency-field correlations  

Science Journals Connector (OSTI)

The ordered Mg(OH)2 crystal structure has been optimized for different pressures in the pressure range 0-21 GPa, within the trigonal P m1 space group. Anharmonic frequencies for the Raman-active OH vibrational mode were calculated from potential energy curves obtained by B3LYP and PW91 calculations with the CRYSTAL06 program. We find that an external pressure leads to an OH frequency downshift, in agreement with experiment, but there are no hydrogen bonds involved. The frequency downshift depends linearly on the electric field exerted on the OH ions from its neighbours in the 'opposite' layer. In agreement with experiment we also find that the pressure-induced 'v(OH) vs. interlayer R(O - - - O)' curve deviates from the well established correlation curves for hydrogen-bonded systems in the literature; the ?v/?R slope for high pressure conditions is much smaller. We also point out the merits of reporting both v(OH) and ?vgas-to-solid for comparison with experiment.

K Hermansson; G Gajewski; P D Mitev

2008-01-01T23:59:59.000Z

294

Regulated underground storage tanks  

SciTech Connect (OSTI)

This guidance package is designed to assist DOE Field operations by providing thorough guidance on the underground storage tank (UST) regulations. (40 CFR 280). The guidance uses tables, flowcharts, and checklists to provide a roadmap'' for DOE staff who are responsible for supervising UST operations. This package is tailored to address the issues facing DOE facilities. DOE staff should use this guidance as: An overview of the regulations for UST installation and operation; a comprehensive step-by-step guidance for the process of owning and operating an UST, from installation to closure; and a quick, ready-reference guide for any specific topic concerning UST ownership or operation.

Not Available

1992-06-01T23:59:59.000Z

295

Regulated underground storage tanks  

SciTech Connect (OSTI)

This guidance package is designed to assist DOE Field operations by providing thorough guidance on the underground storage tank (UST) regulations. [40 CFR 280]. The guidance uses tables, flowcharts, and checklists to provide a ``roadmap`` for DOE staff who are responsible for supervising UST operations. This package is tailored to address the issues facing DOE facilities. DOE staff should use this guidance as: An overview of the regulations for UST installation and operation; a comprehensive step-by-step guidance for the process of owning and operating an UST, from installation to closure; and a quick, ready-reference guide for any specific topic concerning UST ownership or operation.

Not Available

1992-06-01T23:59:59.000Z

296

Ethylene Biosynthesis and Signaling Networks  

Science Journals Connector (OSTI)

...Activation of the ethylene gas response pathway in Arabidopsis...R. (1998). The ethylene gas signal transduction pathway...1027-1036. Mehta, P.K., Hale, T.I., and Christen, P...J.R. (1998). Ethylene gas: Perception, signaling and...

Kevin L.-C. Wang; Hai Li; Joseph R. Ecker

297

Hierarchical classification of modulation signals  

E-Print Network [OSTI]

features are extracted and used to classify 11 modulation signals plus white noise in a hierarchical fashion. The modulation signals include carrier wave (CW), AM, FM, SSB, FSK2, FSK4, PSK2, PSK4, OOK, QAM16, and QAM32. A hierarchy of classifiers...

Kim, Nam Jin

2012-06-07T23:59:59.000Z

298

Design of Optimal Regulators  

E-Print Network [OSTI]

Current research suggests the use of a liner quadratic performance index for optimal control of regulators in various applications. Some examples include correcting the trajectory of rocket and air vehicles, vibration suppression of flexible structures, and airplane stability. In all these cases, the focus is in suppressing/decreasing system deviations rapidly. However, if one compares the Linear Quadratic Regulator (LQR) solution with optimal solutions (minimum time), it is seen that the LQR solution is less than optimal in some cases indeed (3-6) times that obtained using a minimum time solution. Moreover, the LQR solution is sometimes unacceptable in practice due to the fact that values of control extend beyond admissible limits and thus the designer must choose coefficients in the linear quadratic form, which are unknown. The authors suggest methods which allow finding a quasi-optimal LQR solution with bounded control which is closed to the minimum time solution. They also remand the process of the minimum time decision. Keywords: Optimal regulator, minimum time controller, Linear Quadratic Regulator (LQR). -- This paper is declared a work of the U.S. Government and not subject to copyright protection in the USA. The manuscript is accepted as paper AIAA-2003-6638 by 2nd AIAA Unmanned Unlimited Systems, Technologies, and Operations-Aerospace, Land, and See Conference and Workshop - Exhibit, San Diego, California, USA, 15-18 Sep. 2003.

Alexander Bolonkin; Robert Sierakowski

2007-01-19T23:59:59.000Z

299

Emotion Regulation CONCEPTUAL FOUNDATIONS  

E-Print Network [OSTI]

in emotion and emotion regulation. 3 This is a chapter excerpt from Guilford Publications. Handbook, Hofer, & Vaughan, this volume; Shaver & Mikulincer, this volume), and even in physical illness (Sapolsky with a gossipy clerk counts. So does amusement at a cartoon, anger at economic disparities around the world

Gross, James J.

300

Frequency Synthesis in Wireless and Wireline Systems  

E-Print Network [OSTI]

First, a frequency synthesizer for IEEE 802.15.4 / ZigBee transceiver applications that employs dynamic True Single Phase Clocking (TSPC) circuits in its frequency dividers is presented and through the analysis and measurement results...

Turker, Didem 1981-

2010-12-06T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Frequency domain design of interval controller  

E-Print Network [OSTI]

significant role in the analysis and design of interval systems. Its external properties are also discussed. The image set approach & frequency domain criteria can be used to calculate the IP stability margin. The frequency domain criteria are used...

Park, Wunyong

1993-01-01T23:59:59.000Z

302

MRS signal quantitation: a review of time-and frequency-domain methods  

E-Print Network [OSTI]

-PRO HLSVD with partial reorthogonalization [12] HSVD Hankel singular value decomposition [13] HTLS Hankel total least squares [14] HTLS-PK Hankel total least squares using prior knowledge [15] ICA independent

303

Mercury: Results on Mass, Radius, Ionosphere, and Atmosphere from Mariner 10 Dual-Frequency Radio Signals  

Science Journals Connector (OSTI)

...over such large areas and extended...Ionosphere, and Atmosphere from Mariner...that none is larger than the cor-responding...calibration of the plasma contribution...ionosphere and atmosphere, and to deduce...con-stituent of the largest reasonable molec-ular...data is about 10 mhz. 7. M. E...

H. T. Howard; G. L. Tyler; P. B. Esposito; J. D. Anderson; R. D. Reasenberg; I. I. Shapiro; G. Fjeldbo; A. J. Kliore; G. S. Levy; D. L. Brunn; R. Dickinson; R. E. Edelson; W. L. Martin; R. B. Postal; B. Seidel; T. T. Sesplaukis; D. L. Shirley; C. T. Stelzried; D. N. Sweetnam; G. E. Wood; A. I. Zygielbaum

1974-07-12T23:59:59.000Z

304

High-frequency enhancement of magneto-optic data storage signals by optical and electronic filtering  

Science Journals Connector (OSTI)

We show that the system transfer function of magneto-optic data storage systems can be improved significantly by combination of optical filtering and electronic filtering. In our...

Walker, Edwin P; Milster, Tom D

1995-01-01T23:59:59.000Z

305

A Transportable System for Monitoring Ultralow Frequency Electromagnetic Signals Associated with Earthquakes  

Science Journals Connector (OSTI)

...PVC pipe is padded with foam on the inside to increase...water build-up. The cables connecting the coils...as well as the sensor cables can be buried directly...rails, which are well insulated, but some current does...the EMI equipment and cables/cable connectors that...

Darcy Karakelian; Simon L. Klemperer; Antony C. Fraser-Smith; Gregory C. Beroza

306

A Mixed-SignalASIC Power-Factor-Correction(PFC) Controller for High Frequency Switching Rectifiers  

E-Print Network [OSTI]

Regan Zane and Dragan MaksimoviC ColoradoPower Electronics Center (CoPEC) Department of Electrical-chip controller block dia- gram is described, and the fundamental analog and digital op- erating blocks proliferationof electronic systems throughout the home andof- ficeplacesnew constraints on front-end AC

307

Cost and Capacity of Signaling in the Escherichia coli Protein Reaction Network  

E-Print Network [OSTI]

In systems biology new ways are required to analyze the large amount of existing data on regulation of cellular processes. Recent work can be roughly classified into either dynamical models of well-described subsystems, or coarse-grained descriptions of the topology of the molecular networks at the scale of the whole organism. In order to bridge these two disparate approaches one needs to develop simplified descriptions of dynamics and topological measures which address the propagation of signals in molecular networks. Here, we consider the directed network of protein regulation in E. coli, characterizing its modularity in terms of its potential to transmit signals. We demonstrate that the simplest measure based on identifying sub-networks of strong components, within which each node could send a signal to every other node, indeed partitions the network into functional modules. We then suggest measures to quantify the cost and spread associated with sending a signal between any particular pair of proteins. Thereby, we address the signalling specificity within and between modules, and show that in the regulation of E.coli there is a systematic reduction of the cost and spread for signals traveling over more than two intermediate reactions.

Jacob Bock Axelsen; Sandeep Krishna; Kim Sneppen

2007-11-03T23:59:59.000Z

308

METHODS OF RADIO-FREQUENCY CURRENT DRIVE  

E-Print Network [OSTI]

METHODS OF RADIO-FREQUENCY CURRENT DRIVE N. J. FISCH* Princeton Plasma Physics Laboratory-670 Radio-frequency waves can penetrate thermonuclear plasmas, depositing momentum and energy with great. INTRODUCTION Using radio-frequency (rf) waves to drive the toroidal current in tokamak reactors is attractive

309

Frequency–dependent numerical dynamics in mosquitofish  

Science Journals Connector (OSTI)

...can invade, but not drive the others extinct...equilibrium of genotype frequencies and total numbers...replication in the low-frequency treatment because the...treatment to be more variable. Mesocosms were established...from throw-trap data Frequency-dependent numerical...

2002-01-01T23:59:59.000Z

310

Regulating entanglement production in multitrap Bose-Einstein condensates  

E-Print Network [OSTI]

A system of traps is considered, each containing a large number of Bose-condensed atoms. This ensemble of traps is subject to the action of an external modulating field generating nonequilibrium nonground-state condensates. When the frequency of the modulating field is in resonance with the transition frequency between two different topological coherent modes, each trap becomes an analog of a finite-level resonant atom. Similarly to the case of atoms in an electromagnetic resonant field, one can create entanglement between atomic traps subject to a common resonant modulating field generating higher coherent modes in each of the traps. A method is suggested for regulating entanglement production in such a system of multitrap and multimode Bose-Einstein condensates coupled through a common resonant modulating field. Several regimes of evolutional entanglement production, regulated by manipulating the external field, are illustrated by numerical calculations.

V. I. Yukalov; E. P. Yukalova

2006-03-27T23:59:59.000Z

311

Multiple frequency method for operating electrochemical sensors  

DOE Patents [OSTI]

A multiple frequency method for the operation of a sensor to measure a parameter of interest using calibration information including the steps of exciting the sensor at a first frequency providing a first sensor response, exciting the sensor at a second frequency providing a second sensor response, using the second sensor response at the second frequency and the calibration information to produce a calculated concentration of the interfering parameters, using the first sensor response at the first frequency, the calculated concentration of the interfering parameters, and the calibration information to measure the parameter of interest.

Martin, Louis P. (San Ramon, CA)

2012-05-15T23:59:59.000Z

312

Emotion Regulation JAMES J. GROSS  

E-Print Network [OSTI]

CHAPTER 31 ·Emotion Regulation JAMES J. GROSS Have you ever gotten so angry that you've done), and self-regulation (Mischel, Shoda, & Rodriguez, 1989). What is new are the theoretical and empiri cal

Gross, James J.

313

Self-mixing vibration measurement using emission frequency sinusoidal modulation  

Science Journals Connector (OSTI)

Abstract In this paper, a simplified phase demodulation scheme is applied to recover vibration trail on a laser self-mixing interferometer for noncontact vibration measurement. The emission of semiconductor laser diode is modulated by injecting sinusoidal wave, and corresponding interference signal is a quasi-sinusoid wave. The vibration mathematical model for semiconductor laser diode is theoretically educed from basic self-mixing theory, the variation of target is converted into phase information. The simulation of demodulation algorithm and standard deviation are presented and the reconstructed waveform displays a desirable consistence with various moving trails. Following the principle, a minimum experimental system is established and position variation of the target mirror driven by voltage signal is translated into phase shifts, feedback is controlled at weak level during experiment, Fourier transform is implemented to analyze phase information. The comparisons of both amplitude and velocity with a Germany Doppler vibrometer are performed to testify vibration model, the error of proposed demodulation method is less than 30 nm and achieve a high accuracy in vibration frequency. The experimental results indicate the traditional phase technology can be applied on complex optical power signal after adaption providing a feasible application prospects in industrial and scientific situation with an inexpensive semiconductor laser.

Yufeng Tao; Ming Wang; Dongmei Guo; Hui Hao; Qiang Liu

2014-01-01T23:59:59.000Z

314

TGF-? signaling plays an important role in resisting ?-irradiation  

SciTech Connect (OSTI)

Transforming growth factor-?1 (TGF-?1) regulates various biological processes, including differentiation, bone remodeling and angiogenesis, and is particularly important as a regulator of homeostasis and cell growth in normal tissue. Interestingly, some studies have reported that TGF-?1 induces apoptosis through induction of specific genes, whereas others suggest that TGF-?1 inhibits apoptosis and facilitates cell survival. Resolving these discrepancies, which may reflect differences in cellular context, is an important research priority. Here, using the parental mink lung epithelial cell line, Mv1Lu, and its derivatives, R1B and DR26, lacking TGF-? receptors, we investigated the involvement of TGF-? signaling in the effects of ?-irradiation. We found that canonical TGF-? signaling played an important role in protecting cells from ?-irradiation. Introduction of functional TGF-? receptors or constitutively active Smads into R1B and DR26 cell lines reduced DNA fragmentation, Caspase-3 cleavage and ?-H2AX foci formation in ?-irradiated cells. Notably, we also found that de novo protein synthesis was required for the radio-resistant effects of TGF-?1. Our data thus indicate that TGF-?1 protected against ?-irradiation, decreasing DNA damage and reducing apoptosis, and thereby enhanced cell survival. - Highlights: ? TGF-?1 pretreatment inhibits ?-irradiation-induced apoptosis. ? TGF-? signaling reduces ?-irradiation-induced ?-H2AX foci formation. ? de novo protein synthesis is necessary for TGF-?1-induced radio-resistance.

An, You Sun; Kim, Mi-Ra [Division of Radiation Effects, Korea Institute of Radiation and Medical Sciences, Seoul (Korea, Republic of); Lee, Seung-Sook [Laboratory of Experimental Pathology, Korea Institute of Radiation and Medical Sciences, Seoul (Korea, Republic of); Lee, Yun-Sil [College of Pharmacy and Division of Life Science and Pharmaceuticals, Ewha Womans University, Seoul (Korea, Republic of); Chung, Eunkyung [Department of Genetic Engineering, College of Life Science, Kyung-Hee University, Yongin, Gyeonggi-do (Korea, Republic of); Song, Jie-Young [Division of Radiation Cancer Research, Korea Institute of Radiation and Medical Sciences, Seoul (Korea, Republic of); Lee, Jeeyong, E-mail: jeeyongl@gmail.com [Division of Radiation Effects, Korea Institute of Radiation and Medical Sciences, Seoul (Korea, Republic of); Yi, Jae Youn, E-mail: yjy_71@kcch.re.kr [Division of Radiation Effects, Korea Institute of Radiation and Medical Sciences, Seoul (Korea, Republic of)

2013-02-15T23:59:59.000Z

315

An ultra-capacitor for frequency stability enhancement in small-isolated power systems: Models, simulation and field tests  

Science Journals Connector (OSTI)

Abstract The most relevant issue in operation of isolated power systems is frequency stability. Frequency stability is concerned with the ability of generators to supply the loads at an acceptable frequency after a disturbance. Frequency stability is governed by the kinetic energy stored in the generator-prime mover rotating masses and the prime mover frequency primary regulation. If frequency excursions are not within +/?2.5 Hz range, cascade tripping of the remaining generators can occur because of generator over/under frequency protections tripping. Energy storage systems can contribute to frequency stability enhancement if their discharging is governed by a frequency controller. Endesa is leading a research project on testing the state of the art of energy storage systems for several applications (peak-shaving, voltage control, frequency control) in several isolated power systems of the Canary Islands. Several applications are being investigated. One of them consists on the application of a 4 MW–5 s ultracapacitor (UC) for frequency stability enhancement of the La Palma power system. This paper reports the dynamic model developed for time domain simulation and controller design of frequency stability, and field tests undertaken to validate models and the controller settings. A simple but still accurate model is presented. The proposed model takes into account the UC’s state of charge (SoC) and it represents the dynamics of the power electronics by means of a non-linear first-order model. The frequency control consists of droop control and inertia emulation. Ramp rate limits, power limits and SoC are also taken into account in the frequency control. In comparison with the recorded field tests, the proposed model is able to accurately represent the response of the UC for the purpose of frequency stability analysis.

I. Egido; L. Sigrist; E. Lobato; L. Rouco; A. Barrado

2015-01-01T23:59:59.000Z

316

Automated classification of power signals  

E-Print Network [OSTI]

The Non-Intrusive Load Monitor (NILM) is a device that utilizes voltage and current measurements to monitor an entire system from a single reference point. The NILM and associated software convert the V/I signal to spectral ...

Proper, Ethan R. (Ethan Richard)

2008-01-01T23:59:59.000Z

317

California State Regulations  

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

California California State Regulations: California State of California The California Department of Conservation's Division of Oil, Gas, and Geothermal Resources oversees the drilling, operation, maintenance, and plugging and abandonment of oil, natural gas, and geothermal wells. The regulatory program emphasizes the development of oil, natural gas, and geothermal resources in the state through sound engineering practices that protect the environment, prevent pollution, and ensure public safety. Other agencies that may be involved in the regulation of drilling wastes include the State Water Resources Control Board and appropriate Regional Water Quality Control Boards, the California Integrated Waste Management Board, the California Air Resources Board and appropriate Air Quality Management Districts or Air Pollution Control Districts, and the Department of Toxic Substances Control.

318

North Dakota State Regulations  

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

North Dakota North Dakota State Regulations: North Dakota State of North Dakota The North Dakota Industrial Commission (NDIC), through its Oil and Gas Division (OGD), is the regulatory agency for oil and gas exploration and production activities in North Dakota. The North Dakota Department of Health (NDDH) Environmental Health Section (EHS) has the responsibility to safeguard the quality of North Dakota's air, land, and water resources. Contact North Dakota Industrial Commission Oil and Gas Division 600 East Boulevard Avenue, Dept. 405 Bismarck, ND 58505-0840 (701) 328-8020 (phone) (701) 328-8022 (fax) North Dakota Department of Health Environmental Health Section 1200 Missouri Avenue P.O. Box 5520 Bismarck, ND 58506-5520 (701) 328-5150 (phone) (701) 328-5200 (fax) Disposal Practices and Applicable Regulations

319

Nevada State Regulations  

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

Nevada Nevada State Regulations: Nevada State of Nevada The Nevada Division of Minerals (Nevada Commission of Mineral Resources) administers programs and activities to further the responsible development and production of Nevada's mineral resources, including the regulation of oil- and gas-well drilling operations. Otherwise, the Nevada Division of Environmental Protection (Nevada Department of Conservation and Mineral Resources) administers the major environmental protection laws. Contact Nevada Division of Minerals (Carson City Office) 400 West King Street, Suite 106 Carson City, NV 89703 (775) 684-7040 (phone) (775) 684-7052 (fax) (Las Vegas Office) 2030 East Flamingo Road, Suite 220 Las Vegas, NV 89119 (702) 486-4343 (phone) (702) 486-4345 (fax) Nevada Division of Environmental Protection

320

Colorado State Regulations  

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

Colorado Colorado State Regulations: Colorado State of Colorado The Colorado Oil and Gas Conservation Commission (COGCC), a division of the Department of Natural Resources (DNR), regulates oil and gas activities in Colorado. The COGCC has broad statutory authority with respect to impacts on any air, water, soil, or biological resources resulting from oil and gas operations. The COGCC implements the state ground water standards and classifications as they relate to oil and gas exploration and production (E&P) activities. The COGCC has jurisdiction for all Class II injection wells except those on Indian lands. The COGCC has jurisdiction for the management of all E&P wastes except at commercial disposal facilities. The Colorado Department of Public Health and Environment (CDPHE) administers the environmental protection laws related to air quality, waste discharge to surface water, and commercial disposal facilities.

Note: This page contains sample records for the topic "frequency regulation signal" 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

Kansas State Regulations  

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

Kansas Kansas State Regulations: Kansas State of Kansas The Kansas Corporation Commission (KCC) Conservation Division regulates oil and gas operations and protects correlative rights and environmental resources. Otherwise, the Kansas Department of Health and Environment (KDHE) administers the major environmental protection laws. Contact Kansas Corporation Commission (Main Office) 1500 S.W. Arrowhead Road Topeka, KS 66604-2425 (785) 271-3100 (phone) (785) 271-3354 (fax) Conservation Division Finney State Office Building 130 South Market, Room 2078 Wichita, KS 67202-3802 (316) 337-6200 (phone) (316) 337-6211 (fax) Kansas Department of Health and Environment Charles Curtis State Office Building 1000 S.W. Jackson Topeka, KS 66612 (785) 296-1500 (phone) (785) 368-6368 (fax)

322

Oklahoma State Regulations  

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

Oklahoma Oklahoma State Regulations: Oklahoma State of Oklahoma The Oklahoma Corporation Commission (OCC), through the Oil and Gas Division, assists the domestic oil and gas industry, protects and preserves the environment, and conserves the natural resources. General environmental protection regulations are administered by the Oklahoma Department of Environmental Quality (DEQ). Contact Oklahoma Corporation Commission Oil and Gas Division P.O. Box 52000 Oklahoma City, OK 73152-2000 (mailing address) (405) 521-2302 (phone) 2101 North Lincoln Blvd. Oklahoma City, OK 73105 (street address) Oklahoma Department of Environmental Quality P.O. Box 1677 Oklahoma City, OK 73101-1677 (mailing address) 707 North Robinson Oklahoma City, OK 73102 (street address) (405) 702-1000 (phone)

323

Computing Borel's Regulator II.  

E-Print Network [OSTI]

In our earlier article we described a power series formula for the Borel regulator evaluated on the odd-dimensional homology of the general linear group of a number field and, concentrating on dimension three for simplicity, described a computer algorithm which calculates the value to any chosen degree of accuracy. In this sequel we give an algorithm for the construction of the input homology classes and describe the results of one cyclotomic field computation.

Zacky Choo; Wajid Mannan; Rubén J. Sánchez-García; Victor P. Snaith

324

Temperature controlled high voltage regulator  

DOE Patents [OSTI]

A temperature controlled high voltage regulator for automatically adjusting the high voltage applied to a radiation detector is described. The regulator is a solid state device that is independent of the attached radiation detector, enabling the regulator to be used by various models of radiation detectors, such as gas flow proportional radiation detectors.

Chiaro, Jr., Peter J. (Clinton, TN); Schulze, Gerald K. (Knoxville, TN)

2004-04-20T23:59:59.000Z

325

Improving CS regulations.  

SciTech Connect (OSTI)

President Carter issued Executive Order 12044 (3/28/78) that required all Federal agencies to distinguish between significant and insignificant regulations, and to determine whether a regulation will result in major impacts. This study gathered information on the impact of the order and the guidelines on the Office of Conservation and Solar Energy (CS) regulatory practices, investigated problems encountered by the CS staff when implementing the order and guidelines, and recommended solutions to resolve these problems. Major tasks accomplished and discussed are: (1) legislation, Executive Orders, and DOE Memoranda concerning Federal administrative procedures relevant to the development and analysis of regulations within CS reviewed; (2) relevant DOE Orders and Memoranda analyzed and key DOE and CS staff interviewed in order to accurately describe the current CS regulatory process; (3) DOE staff from the Office of the General Counsel, the Office of Policy and Evaluation, the Office of the Environment, and the Office of the Secretary interviewed to explore issues and problems encountered with current CS regulatory practices; (4) the regulatory processes at five other Federal agencies reviewed in order to see how other agencies have approached the regulatory process, dealt with specific regulatory problems, and responded to the Executive Order; and (5) based on the results of the preceding four tasks, recommendations for potential solutions to the CS regulatory problems developed. (MCW)

Nesse, R.J.; Scheer, R.M.; Marasco, A.L.; Furey, R.

1980-10-01T23:59:59.000Z

326

The Nuclear Import of TAF10 Is Regulated by One of Its Three Histone Fold Domain-Containing Interaction Partners  

Science Journals Connector (OSTI)

...localization signal and its nuclear transport is dependent...the regulation of the nuclear localization of TAF10...expression vector containing a nuclear localization signal...Research Institute, Japan) by using primers containing...of 1 Airy unit. Laser power for bleaching was maximal...

Evi Soutoglou; Màté A. Demény; Elisabeth Scheer; Giulia Fienga; Paolo Sassone-Corsi; Làszlò Tora

2005-05-01T23:59:59.000Z

327

Standing waves in a string driven by loudspeakers and signal generators  

Science Journals Connector (OSTI)

The apparatus for demonstrating standing waves in a stretched string has traditionally consisted of a string excited by a fixed frequency vibrator where resonance was achieved by adjusting the tension in the string. This cumbersome approach is alleviated by driving the string with a variable frequency vibrator consisting of a loudspeaker modified with an attachment to grip the string where the loudspeaker is driven by a variable frequency signal generator. The fundamental string resonance and many harmonics can be located quickly using the described apparatus. If two modified loudspeakers are used to drive the string the phenomena of beats can also be demonstrated.

F. P. Clay Jr.; R. L. Kernell

1982-01-01T23:59:59.000Z

328

Gain analysis of blue nitride-based lasers by small signal modulation  

Science Journals Connector (OSTI)

With a small signal frequency-modulation of the driving current the resonance frequency and the damping factor of the optical output power response of blue nitride-based ridge lasers grown on [0001]-plane gallium-nitride substrates were investigated with a network analyzer setup. From the linear dependence of the squared resonance frequency on the driving current the gain coefficients of the logarithmic gain model could be extracted being 7680 ? cm ? 1 for blue nitride-based lasers. For this purpose additional parameters such as the carrier density and the confinement factor were assigned by carrier lifetime and quantum efficiencymeasurements and one dimensional transfer matrix simulations respectively.

J. Müller; M. Scheubeck; M. Sabathil; G. Brüderl; D. Dini; S. Tautz; T. Lermer; A. Breidenassel; S. Lutgen

2010-01-01T23:59:59.000Z

329

ECG-Derived Respiration and Instantaneous Frequency based on the Synchrosqueezing Transform: Application to Patients with Atrial Fibrillation  

E-Print Network [OSTI]

The acquisition of information about respiratory patterns without directly recording the respiratory signals would be beneficial in many clinical settings. The electrocardiogram (ECG)-derived respiration (EDR) algorithm, which derives the respiratory pattern by using the information encoded in ECG signals, enables data acquisition in this manner. However, the traditional EDR algorithm cannot be used in patients with atrial fibrillation (AF) because they have highly irregular heart rates. In this paper, we first provide a definition of ideal instantaneous frequency (IIF) of respiratory signals and then describe how a novel time-frequency representation technique referred to as the Synchrosqueezing transform (SST) was used for the accurate estimation of the IIF of respiratory signals, i.e., SST-IF. Then, we introduce a new EDR algorithm based on the evaluation of the SST-IF. We tested the applicability of our new EDR algorithm in patients with comorbid cardiovascular diseases, most of which were complicated by ...

Yi-Hsin, Chan; Shu-Shya, Hseu; Chi-Tai, Kuo; Yung-Hsin, Yeh

2011-01-01T23:59:59.000Z

330

Wide tracking range, auto ranging, low jitter phase lock loop for swept and fixed frequency systems  

DOE Patents [OSTI]

The present invention provides a wide tracking range phase locked loop (PLL) circuit that achieves minimal jitter in a recovered clock signal, regardless of the source of the jitter (i.e. whether it is in the source or the transmission media). The present invention PLL has automatic harmonic lockout detection circuitry via a novel lock and seek control logic in electrical communication with a programmable frequency discriminator and a code balance detector. (The frequency discriminator enables preset of a frequency window of upper and lower frequency limits to derive a programmable range within which signal acquisition is effected. The discriminator works in combination with the code balance detector circuit to minimize the sensitivity of the PLL circuit to random data in the data stream). In addition, the combination of a differential loop integrator with the lock and seek control logic obviates a code preamble and guarantees signal acquisition without harmonic lockup. An adaptive cable equalizer is desirably used in combination with the present invention PLL to recover encoded transmissions containing a clock and/or data. The equalizer automatically adapts to equalize short haul cable lengths of coaxial and twisted pair cables or wires and provides superior jitter performance itself. The combination of the equalizer with the present invention PLL is desirable in that such combination permits the use of short haul wires without significant jitter.

Kerner, Thomas M. (Manorville, NY)

2001-01-01T23:59:59.000Z

331

Broadband squeezing of quantum noise in a Michelson interferometer with Twin-Signal-Recycling  

E-Print Network [OSTI]

Twin-Signal-Recycling (TSR) builds on the resonance doublet of two optically coupled cavities and efficiently enhances the sensitivity of an interferometer at a dedicated signal frequency. We report on the first experimental realization of a Twin-Signal-Recycling Michelson interferometer and also its broadband enhancement by squeezed light injection. The complete setup was stably locked and a broadband quantum noise reduction of the interferometers shot noise by a factor of up to 4\\,dB was demonstrated. The system was characterized by measuring its quantum noise spectra for several tunings of the TSR cavities. We found good agreement between the experimental results and numerical simulations.

André Thüring; Christian Gräf; Henning Vahlbruch; Moritz Mehmet; Karsten Danzmann; Roman Schnabel

2010-05-25T23:59:59.000Z

332

The characteristics of atmospheric radio frequency discharges with frequency increasing at a constant power density  

SciTech Connect (OSTI)

A computational model is used to investigate the characteristics of atmospheric radio frequency discharges by increasing frequency from 20 to 100 MHz at a constant power density. The simulation results show that increasing frequency can effectively enhance electron density before the transition frequency but after it the ignition is quenched then the electron density decreases. However this simulation also indicates the maximum time-averaged electron energy reduces monotonically with the excitation frequency increasing at a constant power density.

Zhang Yuantao; Li Qingquan; Lou Jie; Li Qingmin [School of Electrical Engineering, Shandong University, Jinan, Shandong Province 250061 (China)

2010-10-04T23:59:59.000Z

333

Intercellular and Intracellular Signaling Pathways Mediating Ionizing Radiation-Induced Bystander Effects  

Science Journals Connector (OSTI)

......wild-type bystander cells,9,14,20) but not in those defective in HR.21) There is also evidence that the types and frequency...tration of chemicals up-regulating GJIC (e.g., retinoids, car- otenoids, green tea component)92) into GJIC-proficient......

Nobuyuki Hamada; Hideki Matsumoto; Takamitsu Hara; Yasuhiko Kobayashi

2007-03-01T23:59:59.000Z

334

ETOH inhibits embryonic neural stem/precursor cell proliferation via PLD signaling  

SciTech Connect (OSTI)

While a mother's excessive alcohol consumption during pregnancy is known to have adverse effects on fetal neural development, little is known about the underlying mechanism of these effects. In order to investigate these mechanisms, we investigated the toxic effect of ethanol (ETOH) on neural stem/precursor cell (NSC) proliferation. In cultures of NSCs, phospholipase D (PLD) is activated following stimulation with epidermal growth factor (EGF) and fibroblast growth factor 2 (FGF2). Exposure of NSCs to ETOH suppresses cell proliferation, while it has no effect on cell death. Phosphatidic acid (PA), which is a signaling messenger produced by PLD, reverses ETOH inhibition of NSC proliferation. Blocking the PLD signal by 1-butanol suppresses the proliferation. ETOH-induced suppression of NSC proliferation and the protective effect of PA for ETOH-induced suppression are mediated through extracellular signal-regulated kinase signaling. These results indicate that exposure to ETOH impairs NSC proliferation by altering the PLD signaling pathway.

Fujita, Yuko [Department of Pharmacology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo 157-8535 (Japan); Research and Development Division, Biomaster, Inc., 3-35 Minaminakatohri, Naka-ku, Yokohama, Kanagawa 231-0006 (Japan); Hiroyama, Masami [Department of Pharmacology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo 157-8535 (Japan); Sanbe, Atsushi [Department of Pharmacology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo 157-8535 (Japan)], E-mail: asanbe@nch.go.jp; Yamauchi, Junji [Department of Pharmacology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo 157-8535 (Japan); Murase, Shoko [Department of Pharmacology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo 157-8535 (Japan); Research and Development Division, Biomaster, Inc., 3-35 Minaminakatohri, Naka-ku, Yokohama, Kanagawa 231-0006 (Japan); Tanoue, Akito [Department of Pharmacology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo 157-8535 (Japan)

2008-05-23T23:59:59.000Z

335

Engineering modelling for alliance of late potentials in ECG signals in the course of wavelets  

Science Journals Connector (OSTI)

Late potentials in ECG take place in the terminal portion of the QRS complex and are characterised by tiny amplitudes and larger frequencies. The occurrence of late potentials may signify underlying distribution of electrical activity of the cells in the heart and provides a substrate for production of arrhythmias (Rama Raju et al., 2008; Rama Raju and Malleswara Rao, 2009a). The problem of late potentials causes high levels of signal power to be seen at frequencies not representing the original signal (Rama Raju et al., 2008; Rama Raju and Malleswara Rao, 2009a). The present work describes the application of wavelet transform to provide a more accurate picture of the localised time-scale features indicative of the late potentials (Addison, 2005). The first step includes generating mathematical equations for various cases by developing a programme in Matlab. Mathematical equations are consequently generated for the signals under consideration and are compared with the available database (Rama Raju et al., 2009, 2010a; Rama Raju and Malleswara Rao, 2009b). The second step includes comparing the signal under consideration with all those signals in the database by developing an identification code in Matlab (Rama Raju et al., 2010c, 2010d). The late potentials in the signals under consideration were analysed and identified (Rama Raju et al., 2010b, 2010c, 2010d). Signals under consideration are represented mathematically and graphically and compared to classify the case more straightforwardly.

P.V. Rama Raju; V. Malleswara Rao; Ch.V. Satyanarayana

2011-01-01T23:59:59.000Z

336

Abstract LB-197: Hepatocyte Growth Factor Activator (HGFA) Inhibitors of c-MET/RON Kinase Signaling  

Science Journals Connector (OSTI)

...is hepatocyte growth factor activator (HGFA) which...single-chain zymogen growth factor ligand precursors to...fluorescence resonance energy transfer (FRET) assay...effectively prevented the conversion of native pro-HGF to...regulation of growth factors, cell signaling, and...

James W. Janetka; Manjula Agarwal; and Darin E. Jones

2011-04-15T23:59:59.000Z

337

Nucleocytoplasmic Shuttling of BZR1 Mediated by Phosphorylation Is Essential in Arabidopsis Brassinosteroid Signaling  

Science Journals Connector (OSTI)

...plant developmental and growth processes through a signaling cascade...Subcellular Distribution Is Interrelated with BIN2 Activity To understand...Subcellular localization of BZR1 interrelated with BIN2 expression implicates...genes in the nucleus. This process must be delicately regulated...

Hojin Ryu; Kangmin Kim; Hyunwoo Cho; Joonghyuk Park; Sunghwa Choe; Ildoo Hwang

2007-09-14T23:59:59.000Z

338

ANRV288-CB22-19 ARI 25 June 2006 14:55 Intracellular Signaling  

E-Print Network [OSTI]

reticulum stress, signal transduction, organelle homeostasis, protein folding, regulated mRNA splicing triggers an exten- sive transcriptional response, which adjusts the ER protein folding capacity according to reestablish homeostasis in the cell's protein folding capacity or--if this cannot be achieved-- commit cells

Walter, Peter

339

The driving frequency effects on the atmospheric pressure corona jet plasmas from low frequency to radio frequency  

Science Journals Connector (OSTI)

Lately the atmospheric pressure jet type coronaplasma which has been typically driven by dc to low frequency (LF: several tens of kHz) is often generated by using radio frequency of 13.56 MHz. Yet the relationship between the plasma and its driving frequency has seldom been investigated. Hence in this study dependence of the atmospheric pressurecoronaplasmacharacteristics on the driving frequency was explored experimentally from LF to rf (5 kHz–13.56 MHz). The plasmas generated by the driving frequency under 2 MHz were cylindrical shape of several tens of millimeters long while the 13.56 MHz plasma is spherical and a few millimeters long. As the driving frequency was increased the plasma length became shortened. At the lower driving frequencies (below 2 MHz) the plasmas existed as positive streamer and negative glow for each half period of the applied voltage but the discharge was more continuous in time for the 13.56 MHz plasma. It was inferred from the measured I–V curves that the higher driving frequency induced higher discharge currents and the gas temperature was increased as the driving frequency was increased.

Dan Bee Kim; H. Jung; B. Gweon; S. Y. Moon; J. K. Rhee; W. Choe

2011-01-01T23:59:59.000Z

340

On frequency dependence of pulsar linear polarization  

E-Print Network [OSTI]

Frequency dependence of pulsar linear polarization is investigated by simulations of emission and propagation processes. Linearly polarized waves are generated through curvature radiation by relativistic particles streaming along curved magnetic field lines, which have ordinary mode (O-mode) and extra-ordinary mode (X-mode) components. As emitted waves propagate outwards, two mode components are separated due to re- fraction of the O mode, and their polarization states are also modified. According to the radius to frequency mapping, low frequency emission is generated from higher magnetosphere, where significant rotation effect leads the X and O modes to be sepa- rated. Hence, the low frequency radiation has a large fraction of linear polarization. As the frequency increases, emission is generated from lower heights, where the rotation effect becomes weaker and the distribution regions of two modes are more overlapped. Hence, more significant depolarization appears for emission at higher frequencies. In addit...

Wang, P F; Han, J L

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Investigation of modal processing for low frequency acoustic communications in shallow water  

Science Journals Connector (OSTI)

Acoustic receptions at a vertical line array collected during the SW06 experiment were processed to show the feasibility of broadband mode decomposition as a preprocessing method to shorten time-spread and concentrate received signal energy in a small number of independent channels. The vertical array spanned the water column from 12 m depth to the bottom. PSK m-sequence modulated signals with different carrier frequencies were transmitted from a distance of 19.2 km. Signals were processed for both the case of ordinary internal waves activity and the case with abnormally strong internal wave solitons. The measured sound velocity and known bottom properties were accounted for. Mode filtering was based on a broadband pseudo-inverse processing of the received VLA signals. The broadband mode filtering decomposed the received signal into a number of independent signals with a reduced time-spread. The constellation of signals from the output of mode filters showed that a simple demodulator can achieve a high quality reception. Even during strong internal waves activity the acoustic energy was concentrated in a small number of the first acoustical modes. The receiver estimated the mode-time intensity distribution and used the strongest modes for demodulation. High quality reception is demonstrated with the data.

Andrey K. Morozov; James C. Preisig; Joseph C. Papp

2008-01-01T23:59:59.000Z

342

Investigation of modal processing for low frequency acoustic communications in shallow water  

Science Journals Connector (OSTI)

Acoustic receptions at a vertical line array collected during the SW06 experiment were processed to show the feasibility of broadband mode decomposition as a preprocessing method to shorten time?spread and concentrate received signal energy in a small number of independent channels. The vertical array spanned the water column from 12 m depth to the bottom. PSK m?sequence modulated signals with different carrier frequencies were transmitted from a distance of 19.2 km. Signals were processed for both the case of ordinary internal waves activity and the case with abnormally strong internal wavesolitons. The measured sound velocity and known bottom properties were accounted for. Mode filtering was based on a broadband pseudo?inverse processing of the received VLA signals. The broadband mode filtering decomposed the received signal into a number of independent signals with a reduced time?spread. The constellation of signals from the output of mode filters showed that a simple demodulator can achieve a high quality reception. Even during strong internal waves activity the acoustic energy was concentrated in a small number of the first acoustical modes. The receiver estimated the mode?time intensity distribution and used the strongest modes for demodulation. High quality reception is demonstrated with the data.

Andrey Morozov; James Preisig; Joseph Papp

2008-01-01T23:59:59.000Z

343

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

Science Journals Connector (OSTI)

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

Lei Wang; Hongjie Jia

2012-04-01T23:59:59.000Z

344

IEEE SIGNAL PROCESSING LETTERS, VOL. 18, NO. 10, OCTOBER 2011 587 Compressed LED Illumination Sensing  

E-Print Network [OSTI]

IEEE SIGNAL PROCESSING LETTERS, VOL. 18, NO. 10, OCTOBER 2011 587 Compressed LED Illumination emitting diodes (LEDs) are ca- pable of producing high intensity light across a wide spread of frequencies. This facilitates the design of the driving waveforms for the LEDs. This procedure is known as illumination sensing

Nehorai, Arye

345

Electric signaling behavior and the mechanisms of electric organ discharge production in mormyrid fish  

E-Print Network [OSTI]

, the sequence of pulse intervals (SPI) is variable and plays more of a role in signaling behavioral states, and therefore drive the generation of SPI patterns. Current studies are addressing the mechanisms underlying in the electrosensory system of gymnotiform fish for determining the frequency difference between a fish's own electric

346

Impact of Signaling Load on the UMTS Call Blocking/Dropping  

E-Print Network [OSTI]

100 Bureau Drive, Stop 8920, Gaithersburg, MD, 20899 Email: yqian@nist.gov Abstract-- Radio resources control, and variable data rate require- ment), and has impact on quality of user data communications where user data and signaling services are transmitted over the same large frequency range

Tipper, David

347

Design and characterization of a signal insulation coreless transformer integrated in a CMOS gate driver chip  

E-Print Network [OSTI]

Design and characterization of a signal insulation coreless transformer integrated in a CMOS gate transformer integrated in a CMOS silicon die together with the gate driver and other required functions frequency through the coreless transformer. The chosen design methodology will be explained and experimental

Paris-Sud XI, Université de

348

Small-Signal Modeling of a Three-Phase Isolated Inverter with Both Voltage and  

E-Print Network [OSTI]

with the introduction of modern power generating units such as wind and solar power plants. As these new energy sourcesSmall-Signal Modeling of a Three-Phase Isolated Inverter with Both Voltage and Frequency Droop Rolla, Missouri 65409 Abstract-- In conventional power system operation, droop control methods are used

Kimball, Jonathan W.

349

Frequency modulation drive for a piezoelectric motor  

DOE Patents [OSTI]

A piezoelectric motor has peak performance at a specific frequency f.sub.1 that may vary over a range of frequencies. A drive system is disclosed for operating such a motor at peak performance without feedback. The drive system consists of the motor and an ac source connected to power the motor, the ac source repeatedly generating a frequency over a range from f.sub.1 -.DELTA.x to f.sub.1 +.DELTA.y.

Mittas, Anthony (Albuquerque, NM)

2001-01-01T23:59:59.000Z

350

Texas State Regulations  

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

Texas Texas State Regulations: Texas State of Texas The Railroad Commission of Texas (RCC), through the Oil and Gas Division, administers oil and gas exploration, development, and production operations, except for oil and gas leasing, royalty payments, surface damages through oil and gas operations, and operator-landowner contracts. The RCC and the Texas Commission on Environmental Quality (TCEQ), formerly, the Texas Natural Resource Conservation Commission (TNRCC), have entered into a Memorandum of Understanding clarifying jurisdiction over oil field wastes generated in connection with oil and gas exploration, development, and production. The RCC Oil and Gas Division operates nine district offices, each staffed with field enforcement and support personnel.

351

Self-regulating valve  

DOE Patents [OSTI]

A variable, self-regulating valve having a hydraulic loss coefficient proportional to a positive exponential power of the flow rate. The device includes two objects in a flow channel and structure which assures that the distance between the two objects is an increasing function of the flow rate. The range of spacing between the objects is such that the hydraulic resistance of the valve is an increasing function of the distance between the two objects so that the desired hydraulic loss coefficient as a function of flow rate is obtained without variation in the flow area.

Humphreys, D.A.

1982-07-20T23:59:59.000Z

352

A chip-scale, telecommunications-band frequency conversion interface for quantum emitters  

E-Print Network [OSTI]

We describe a chip-scale, telecommunications-band frequency conversion interface designed for low-noise operation at wavelengths desirable for common single photon emitters. Four-wave mixing Bragg scattering in silicon nitride waveguides is used to demonstrate frequency upconversion and downconversion between the 980 nm and 1550 nm wavelength regions, with signal-to-background levels >10 and conversion efficiency of approximately -60 dB at low continuous wave input pump powers (25 % in existing geometries. Finally, we present waveguide designs that can be used to connect shorter wavelength (637 nm to 852 nm) quantum emitters with 1550 nm.

Imad Agha; Serkan Ates; Marcelo Davanco; Kartik Srinivasan

2013-04-21T23:59:59.000Z

353

Frequencies Studies Applied to Photovoltaic Modules.  

E-Print Network [OSTI]

?? This master thesis proposes to study applications of frequencies studies to the case of photovoltaic modules and photovoltaic plants. Such studies are little used… (more)

Miquel, Clément

2011-01-01T23:59:59.000Z

354

High-Frequency Electrostatic Plasma Instabilities  

Science Journals Connector (OSTI)

A description of the stability properties of a plasma under the influence of an external electric field oscillating near the plasma frequency is presented.

J. P. Freidberg and B. M. Marder

1971-10-01T23:59:59.000Z

355

High-frequency, high-intensity photoionization  

Science Journals Connector (OSTI)

Two analytical methods for computing ionization by high-frequency fields are compared. Predicted ionization rates compare well, but energy predictions for the onset of ionization...

Reiss, H R

1996-01-01T23:59:59.000Z

356

Explosives detection with a frequency modulation spectrometer  

Science Journals Connector (OSTI)

An explosives detection instrument was designed and tested at SRI International. The instrument uses frequency modulation spectroscopy with midinfrared lead-salt diode lasers to...

Riris, H; Carlisle, C B; McMillen, D F; Cooper, D E

1996-01-01T23:59:59.000Z

357

Evolution of the 21 cm signal throughout cosmic history  

E-Print Network [OSTI]

The potential use of the redshifted 21 cm line from neutral hydrogen for probing the epoch of reionization is motivating the construction of several low-frequency interferometers. There is also much interest in the possibility of constraining the initial conditions from inflation and the nature of the dark matter and dark energy by probing the power-spectrum of density perturbations in three dimensions and on smaller scales than probed by the microwave background anisotropies. Theoretical understanding of the 21 cm signal has been fragmented into different regimes of physical interest. In this paper, we make the first attempt to describe the full redshift evolution of the 21 cm signal between 0 25 before the first galaxies had formed, or to z < 6 when the residual pockets of hydrogen trace large scale structure.

Pritchard, Jonathan R

2008-01-01T23:59:59.000Z

358

6 - Nuclear Waste Regulations  

Science Journals Connector (OSTI)

The most influential national and international bodies providing recommendations on radiation protection are described, including the International Commission on Radiological Protection (ICRP) and the International Atomic Energy Agency (IAEA). Protection philosophies and the ICRP general principles of radiation protection are discussed. Radioactive material regulations and sources of radiation are explained. Criteria of exemption from regulatory control are discussed with examples of exemption levels for naturally occurring and radioactive waste radionuclides. Clearance of both moderate and bulk amounts of materials from regulatory control is also explained, including examples of EU and the UK regulations. Dose limits recommended by the ICRP are given, as well as the main principles of control of radiation hazards. Nuclear waste classification schemes are outlined, including the IAEA classification scheme. A brief explanation of nuclear waste classes including exempt waste, very short-lived waste, very low-level waste, low-level waste, intermediate-level waste and high-level waste is given. Examples of waste classification schemes are given, including that of the UK.

M.I. Ojovan; W.E. Lee

2014-01-01T23:59:59.000Z

359

Multiple-frequency acoustic wave devices for chemical sensing and materials characterization in both gas and liquid phase  

DOE Patents [OSTI]

A chemical or intrinsic physical property sensor is described comprising: (a) a substrate; (b) an interaction region of said substrate where the presence of a chemical or physical stimulus causes a detectable change in the velocity and/or an attenuation of an acoustic wave traversing said region; and (c) a plurality of paired input and output interdigitated electrodes patterned on the surface of said substrate where each of said paired electrodes has a distinct periodicity, where each of said paired electrodes is comprised of an input and an output electrode; (d) an input signal generation means for transmitting an input signal having a distinct frequency to a specified input interdigitated electrode of said plurality so that each input electrode receives a unique input signal, whereby said electrode responds to said input signal by generating an acoustic wave of a specified frequency, thus, said plurality responds by generating a plurality of acoustic waves of different frequencies; (e) an output signal receiving means for determining an acoustic wave velocity and an amplitude of said acoustic waves at several frequencies after said waves transverses said interaction region and comparing these values to an input acoustic wave velocity and an input acoustic wave amplitude to produce values for perturbations in acoustic wave velocities and for acoustic wave attenuation as a function of frequency, where said output receiving means is individually coupled to each of said output interdigitated electrode; (f) a computer means for analyzing a data stream comprising information from said output receiving means and from said input signal generation means to differentiate a specified response due to a perturbation from a subsequent specified response due to a subsequent perturbation to determine the chemical or intrinsic physical properties desired.

Martin, S.J.; Ricco, A.J.

1993-08-10T23:59:59.000Z

360

Word length and frequency as determinants of stuttering  

Science Journals Connector (OSTI)

Word length and Frequency were independently varied to assess their effect on stuttering frequency. The list of test words contained ... low, medium of high frequency of occurrence. Stuttering frequency of 31 you...

I. M. Schlesinger; Rachel Melkman; Ron Levy

1966-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

COBE Data Spatial--Frequency Analysis and CMB Anisotropy Spectrum  

E-Print Network [OSTI]

We discuss the problem of CMB spectrum corruption during Galactic emission removing. A new technique of spatial--frequency data reduction is proposed. The technique gives us a possibility to avoid a spatial harmonics nonorthogonality. The proposed technique is applied to the two-year COBE DMR sky maps. We exclude the harmonics with l=7, 9,13, 23 and 25 as having anomalous statistics noise behavior. One shows that procedure do not give systematic errors, if the data are statistically regular. The spectral parameter of the power spectrum of primordial perturbation $n=1.84 \\pm 0.29$ and quadrupole moment $Q_2=15.22 \\pm 3.0$ are estimated. The power spectrum estimation results are inconsistent with the Harrison-Zel`dovich $n=1$ model with the confidence 99%. It is shown a necessity of an increasing a survey sensitivity to reach a more reliable estimation of the cosmological signal.

A. A. Brukhanov; D. P. Skulachev; I. A. Strukov; T. V. Konkina

1995-12-22T23:59:59.000Z

362

Low?frequency sound attentuation in the Northeastern Pacific Ocean  

Science Journals Connector (OSTI)

Signals from SUS bombs were received at four hydrophones suspended in the deep ocean from the Research Platform FLIP. Using digital processing equipment and fast Fourier transform methods energy?flux spectral densities were determined for approximately 700 shots out to a maximum range of 1600 nautical miles. Differences in propagation losses at various octave and one?third?octave frequency bands up to 400 Hz were used to calculate attenuation values. The resulting values are lower than those predicted from Thorp's equation but are in agreement with published values determined from cw acoustic transmission experiments in the Northeastern Pacific [J. R. Lovett J. Acoust. Soc. Am. 58 620–625 (1975)]. [Work supported by the Office of Naval Research.

G. B. Morris

1976-01-01T23:59:59.000Z

363

Method for imaging with low frequency electromagnetic fields  

DOE Patents [OSTI]

A method is described for imaging with low frequency electromagnetic fields, and for interpreting the electromagnetic data using ray tomography, in order to determine the earth conductivity with high accuracy and resolution. The imaging method includes the steps of placing one or more transmitters, at various positions in a plurality of transmitter holes, and placing a plurality of receivers in a plurality of receiver holes. The transmitters generate electromagnetic signals which diffuse through a medium, such as earth, toward the receivers. The measured diffusion field data H is then transformed into wavefield data U. The travel times corresponding to the wavefield data U, are then obtained, by charting the wavefield data U, using a different regularization parameter [alpha] for each transform. The desired property of the medium, such as conductivity, is then derived from the velocity, which in turn is constructed from the wavefield data U using ray tomography. 13 figures.

Lee, K.H.; Xie, G.Q.

1994-12-13T23:59:59.000Z

364

Method for imaging with low frequency electromagnetic fields  

DOE Patents [OSTI]

A method for imaging with low frequency electromagnetic fields, and for interpreting the electromagnetic data using ray tomography, in order to determine the earth conductivity with high accuracy and resolution. The imaging method includes the steps of placing one or more transmitters, at various positions in a plurality of transmitter holes, and placing a plurality of receivers in a plurality of receiver holes. The transmitters generate electromagnetic signals which diffuse through a medium, such as earth, toward the receivers. The measured diffusion field data H is then transformed into wavefield data U. The traveltimes corresponding to the wavefield data U, are then obtained, by charting the wavefield data U, using a different regularization parameter .alpha. for each transform. The desired property of the medium, such as conductivity, is then derived from the velocity, which in turn is constructed from the wavefield data U using ray tomography.

Lee, Ki H. (Lafayette, CA); Xie, Gan Q. (Berkeley, CA)

1994-01-01T23:59:59.000Z

365

Ionic and neuromodulatory regulation of burst discharge controls frequency tuning W. Hamish Mehaffey a,1  

E-Print Network [OSTI]

on perturbations of a self-generated electric field, the electric organ discharge (EOD), in order to sense its environment (Fig. 1A). Changes in the expected pattern of the EOD are caused by nearby objects, such as prey, and the EODs

Krahe, RĂŒdiger

366

Author's personal copy Ionic and neuromodulatory regulation of burst discharge controls frequency tuning  

E-Print Network [OSTI]

discharge (EOD), in order to sense its environment (Fig. 1A). Changes in the expected pattern of the EOD

Chacron, Maurice

367

Optically isolated signal coupler with linear response  

DOE Patents [OSTI]

An optocoupler for isolating electrical signals that translates an electrical input signal linearly to an electrical output signal. The optocoupler comprises a light emitter, a light receiver, and a light transmitting medium. The light emitter, preferably a blue, silicon carbide LED, is of the type that provides linear, electro-optical conversion of electrical signals within a narrow wavelength range. Correspondingly, the light receiver, which converts light signals to electrical signals and is preferably a cadmium sulfide photoconductor, is linearly responsive to light signals within substantially the same wavelength range as the blue LED.

Kronberg, James W. (Aiken, SC)

1994-01-01T23:59:59.000Z

368

Genomic Collaboration of Estrogen Receptor ? and Extracellular Signal-Regulated Kinase 2 in Regulating Gene and Proliferation Programs  

Science Journals Connector (OSTI)

...Boston, Massachusetts 02115 The nuclear hormone receptor, estrogen...positions this kinase to support nuclear receptor activities in crucial...Katzenellenbogen. 2008. Nuclear and extranuclear pathway inputs...meta-analysis of expression microarray datasets: 17beta-estradiol in MCF-7...

Zeynep Madak-Erdogan; Mathieu Lupien; Fabio Stossi; Myles Brown; Benita S. Katzenellenbogen

2010-10-18T23:59:59.000Z

369

Phosphorylation of phosphoprotein enriched in astrocytes (PEA-15) regulates extracellular signal-regulated kinase-dependent transcription and cell proliferation  

E-Print Network [OSTI]

hemagglutinin (HA) tag and Rho GDI were obtained from Santathe cytosolic marker Rho GDI, and cytosolic fractions were

Krueger, Joseph; Chou, Fan-Li; Glading, Angela; Schaefer, Erik; Ginsberg, Mark H

2005-01-01T23:59:59.000Z

370

Frequency-Domain Multiplexed Readout for Superconducting Gamma-Ray Detectors  

SciTech Connect (OSTI)

We are developing a frequency-multiplexed readout for arrays of high-resolution Gamma detectors based on superconducting transition edge sensors (TESs). Each sensor is part of an LCR resonant circuit and is biased at an identifying carrier frequency. Several carrier signals are added and amplified with a single SQUID preamplifier at 4 K. Gamma absorption modulates the amplitude of the carrier, and demodulation at room temperature retrieves the initial temperature evolution of the sensor. This multiplexing system has originally been developed to read out large arrays of bolometers for cosmic microwave background studies. To accommodate the faster Gamma-ray signals, its demodulator bandwidth is being extended to 20 kHz to allow reading out up to eight TESs with a detector bandwidth of 10 kHz. Here we characterize the system noise performance and show how this multiplexing scheme can be adapted to read out arrays of superconducting Gamma-ray detectors.

Dreyer, Jonathan G.; Arnold, Kam; Lanting, Trevor M.; Dobbs, Matt A.; Friedrich, Stephan; Lee, Adrian T.; Spieler, Helmuth G.

2006-08-30T23:59:59.000Z

371

Contactless measurement of nonlinear conductivity in the radio-frequency range  

E-Print Network [OSTI]

We have developed a system for contactless measurement of nonlinear conductivity in the radio-frequency band, and over a wide temperature range. A non-resonant circuit is used to electrically excite the sample, and the induced signal is detected by a resonant circuit whose natural frequency matches higher harmonics of the excitation. A simple modification of the probe allows non-resonant detection suitable for stronger signals. Two measurement procedures are proposed that allow significant excitation power variation, up to 150 W. The apparatus has been validated trough the measurement of the nonlinear response at the superconducting transition of a high-Tc superconductor, and the nematic transition of an iron pnictide.

Došli?, Marija; Požek, Miroslav

2014-01-01T23:59:59.000Z

372

Velocimetry signal synthesis with fringen.  

SciTech Connect (OSTI)

An important part of velocimetry analysis is the recovery of a known velocity history from simulated data signals. The fringen program synthesizes VISAR and PDV signals, given a specified velocity history, using exact formulations for the optical signal. Time-dependent light conditions, non-ideal measurement conditions, and various diagnostic limitations (noise, etc.) may be incorporated into the simulated signals. This report describes the fringen program, which performs forward VISAR (Velocity Interferometer System for Any Reflector) and PDV (Photonic Doppler Velocimetry, also known as heterodyne velocimetry) analysis. Nearly all effects that might occur in VISAR/PDV measurement of a single velocity can be modeled by fringen. The program operates in MATLAB, either within a graphical interface or as a user-callable function. The current stable version of fringen is 0.3, which was released in October 2010. The following sections describe the operation and use of fringen. Section 2 gives a brief overview of VISAR and PDV synthesis. Section 3 illustrates the graphical and console interface of fringen. Section 4 presents several example uses of the program. Section 5 summarizes program capabilities and discusses potential future work.

Dolan, Daniel H., III

2011-02-01T23:59:59.000Z

373

1 Pitch, Frequency, Musical Scales 1 1.1 Pitch and Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  

E-Print Network [OSTI]

Contents ix 1 Pitch, Frequency, Musical Scales 1 1.1 Pitch and Frequency.2 Overtones, Pitch Equivalence, and Musical Scales . . . . . . . . . . . . . . . . . . . . . . . . 6 1.2.1 Pitch Equivalence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1

Walker, James S.

374

HF heating of a plasma column at frequencies below the electron cyclotron frequency  

Science Journals Connector (OSTI)

Dispersion of waves, excited by the helical structure in a plasma column and the heating of a tail of the electron distribution ... frequencies below the electron plasma and the electron cyclotron frequency.

J. ?atlov; V. Kopeckę; J. Musil; F. Žá?ek; K. Novik

1978-01-01T23:59:59.000Z

375

Nebraska Air Quality Regulations (Nebraska)  

Broader source: Energy.gov [DOE]

These regulations, promulgated by the Department of Environmental Quality, contain provisions pertaining to ambient air quality standards, pollution source operating permits, emissions reporting,...

376

Underground Injection Control Regulations (Kansas)  

Broader source: Energy.gov [DOE]

This article prohibits injection of hazardous or radioactive wastes into or above an underground source of drinking water, establishes permit conditions and states regulations for design,...

377

Definition: Frequency Response | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Frequency Response Jump to: navigation, search Dictionary.png Frequency Response (Equipment) The ability of a system or elements of the system to react or respond to a change in system frequency. (System) The sum of the change in demand, plus the change in generation, divided by the change in frequency, expressed in megawatts per 0.1 Hertz (MW/0.1 Hz).[1] View on Wikipedia Wikipedia Definition Related Terms system, smart grid References ↑ Glossary of Terms Used in Reliability Standards An i LikeLike UnlikeLike You like this.Sign Up to see what your friends like. nline Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Frequency_Response&oldid=502580"

378

Air-flow regulation system for a coal gasifier  

DOE Patents [OSTI]

An improved air-flow regulator for a fixed-bed coal gasifier is provided which allows close air-flow regulation from a compressor source even though the pressure variations are too rapid for a single primary control loop to respond. The improved system includes a primary controller to control a valve in the main (large) air supply line to regulate large slow changes in flow. A secondary controller is used to control a smaller, faster acting valve in a secondary (small) air supply line parallel to the main line valve to regulate rapid cyclic deviations in air flow. A low-pass filter with a time constant of from 20 to 50 seconds couples the output of the secondary controller to the input of the primary controller so that the primary controller only responds to slow changes in the air-flow rate, the faster, cyclic deviations in flow rate sensed and corrected by the secondary controller loop do not reach the primary controller due to the high frequency rejection provided by the filter. This control arrangement provides at least a factor of 5 improvement in air-flow regulation for a coal gasifier in which air is supplied by a reciprocating compressor through a surge tank.

Fasching, George E. (Morgantown, WV)

1984-01-01T23:59:59.000Z

379

A Dual Tone Multiple Frequency receiver using a multiplexed OTA-C filter frequency detection architecture  

E-Print Network [OSTI]

A DUAL TONE MULTIPLE FREQUENCY RECEIVER USING A MULTIPLEXED OTA-C FILTER FREQUENCY DETECTION ARCHITECTURE A Thesis by GERALD WILLIAM GARCIA Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE August 1988 Major Subject: Electrical Engineering A DUAL TONE MULTIPLE FREQUENCY RECEIVER USING A MULTIPLEXED OTA-C FILTER FREQUENCY DETECTION ARCHITECTURE A Thesis by GERALD WILLIAM GARCIA Approved as to style...

Garcia, Gerald William

2012-06-07T23:59:59.000Z

380

Nebraska State Regulations  

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

Nebraska Nebraska State Regulations: Nebraska State of Nebraska The Nebraska Oil and Gas Conservation Commission (NOGCC) seeks to prevent waste, protect correlative rights of all owners, and encourage and authorize secondary recovery, pressure maintenance, cycling, or recycling, in order that the greatest ultimate recovery of oil and gas may be obtained within the state while protecting the environment. Otherwise, the Nebraska Department of Environmental Quality (NDEQ) administers the major environmental protection laws. Contact Nebraska Oil and Gas Conservation Commission 922 Illinois Street, P.O. Box 399 Sidney, NE 69162 (308) 254-6919 (phone) (308) 254-6922 (fax) Nebraska Department of Environmental Quality 1200 "N" Street, Suite 400 P.O. Pox 98922 Lincoln, NE 68509

Note: This page contains sample records for the topic "frequency regulation signal" 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

Kentucky State Regulations  

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

Kentucky Kentucky State Regulations: Kentucky State of Kentucky The Division of Oil and Gas (DOG) in the Department of Natural Resources (DNR) fosters conservation of all mineral resources, encourages exploration of such resources, protects the correlative rights of land and mineral owners, prohibits waste and unnecessary surface loss and damage, and encourages the maximum recovery of oil and gas from all deposits. The Energy and Environment Cabinet brings together various Kentucky agencies. It is tasked with protecting and enhancing Kentucky's natural resources. The Department for Environmental Protection (DEP) administers the major environmental protection laws. The U.S. Environmental Protection Agency (EPA) Region 4 administers Class II underground injection control (UIC) programs in Kentucky in direct implementation.

382

Computing Borel's Regulator.  

E-Print Network [OSTI]

We present an infinite series formula based on the Karoubi-Hamida integral, for the universal Borel class evaluated on H_{2n+1}(GL(\\mathbb{C})). For a cyclotomic field F we define a canonical set of elements in K_3(F) and present a novel approach (based on a free differential calculus) to constructing them. Indeed, we are able to explicitly construct their images in H_{3}(GL(\\mathbb{C})) under the Hurewicz map. Applying our formula to these images yields a value V_1(F), which coincides with the Borel regulator R_1(F) when our set is a basis of K_3(F) modulo torsion. For F= \\mathbb{Q}(e^{2\\pi i/3}) a computation of V_1(F) has been made based on our techniques.

Zacky Choo; Wajid Mannan; Rubén J. Sánchez-García; Victor P. Snaith

383

Coordination of Voltage and Frequency Feedback in Load-Frequency Control Capability of Wind Turbine  

E-Print Network [OSTI]

Coordination of Voltage and Frequency Feedback in Load-Frequency Control Capability of Wind Turbine-Frequency Control (LFC) is gradually shifted to Variable Speed Wind Turbines (VSWTs). In order to equip VSWT@et.aau.dk Abstract--In near future, with high penetration of Wind Energy (WE) in power system, the burden of Load

Silva, Filipe Faria Da

384

Phase-stabilized 167 MHz Repetition Frequency Carbon Nanotube Fiber Laser Frequency Comb  

E-Print Network [OSTI]

Phase-stabilized 167 MHz Repetition Frequency Carbon Nanotube Fiber Laser Frequency Comb Jinkang [2, 3]. Mode-locked fiber lasers using single-walled carbon nanotubes as a saturable absorber have-referenced frequency comb from a fiber laser passively modelocked by single walled carbon nanotubes. The carbon

Washburn, Brian

385

Subjective response to low?frequency aircraft noise  

Science Journals Connector (OSTI)

The standard metric currently in use by the U.S. government for community noise from aircraft is the day?night level (DNL) which is based on the A?weighting network. However residents of communities near airports have reported annoyance due to aircraft noise in greater proportion than what the DNL contour associated with their address predicts. Complaints of ‘‘distant rumbling’’ appear to be related to the low?frequency noise that aircraft produce for which the DNL metric does not fully account. This presentation discusses measurements made in October 2004 at two residences near runways at Washington?Dulles International Airport. Noise data are recorded both inside and outside the structures allowing for a measure of the events’ impact both inside and outside the structure as well as the filtering effect of the structure on the signal. Laboratory subjective evaluation studies of the recorded aircraft signatures are conducted. Objective metrics those that are designed for low?frequency noise and those that are not are calculated and correlated with subjective rankings of the signatures. This gauges the metrics’ effectiveness in predicting subjective perception of aircraft noise signatures. [Work supported by the Federal Aviation Administration and the Exploratory and Foundational Program of the Applied Research Laboratory Penn State University.

2005-01-01T23:59:59.000Z

386

Impact of short-term storage on frequency response under increasing wind penetration  

Science Journals Connector (OSTI)

Abstract In this paper, the effort is to study the impact of short-term storage technology in stabilizing the frequency response under increasing wind penetration. The frequency response is studied using Automatic Generation Control (AGC) module, and is quantified in terms of Control Performance Standards (CPS). The single area IEEE Reliability Test System (RTS) was chosen, and battery storage was integrated within the AGC. The battery proved to reduce the frequency deviations and provide good CPS scores with higher penetrations of wind. The results also discuss the ability of the short term storage to benefit the system by reducing the hourly regulation deployment and the cycling undergone by conventional units, by dint of their fast response; and sheds light on the economic implications of their benefits.

Venkat Krishnan; Trishna Das; James D. McCalley

2014-01-01T23:59:59.000Z

387

Adaptive wavelet transform for vibration signal modelling and application in fault diagnosis of water hydraulic motor  

Science Journals Connector (OSTI)

There has been an increasing application of water hydraulics in industries due to growing concern on the environmental, health and safety issues. The fault diagnosis of water hydraulic motor is important for improving water hydraulic system reliability and performance. In this paper, fault diagnosis of water hydraulic motor in water hydraulic system is investigated based on adaptive wavelet analysis. A novel method for modelling the vibration signal based on the adaptive wavelet transform (AWT) is proposed. The linear combination of wavelets is introduced as wavelet itself and adapted for the particular vibration signal, which goes beyond adapting parameters of a fixed-shape wavelet. The AWT procedure based on the parametric optimisation by genetic algorithm (GA) is developed. The model-based method by AWT is applied to extract the features in the fault diagnosis of the water hydraulic motor. This technique for de-noising the corrupted simulation signal shows that it can improve the signal-to-noise ratio of the vibration signal. The results of the experimental signal demonstrate the characteristic vibration signal details in fine resolution. The magnitude plots of the continuous wavelet transform (CWT) show the characteristic signal's energy in time and frequency domain which can be used as feature values for fault diagnosis of water hydraulic motor.

H.X. Chen; Patrick S.K. Chua; G.H. Lim

2006-01-01T23:59:59.000Z

388

Measurements of ionospheric effects on wideband signals at VHF  

SciTech Connect (OSTI)

Radars operating at very high frequency (VHF) have enhanced foliage and ground penetration compared to radars operated at higher frequencies. For example, VHF systems operated from airplanes have been used as synthetic aperture radars (SAR); a satellite-borne VHF SAR would have considerable utility. In order to operate with high resolution it would have to use both a large relative bandwidth and a large aperture. A satellite-borne radar would likely have to operate at altitudes above the maximum density of the ionosphere; the presence of the ionosphere in the propagation path of the radar will cause a deterioration of the performance because of dispersion over the bandwidth. The author presents measurements of the effects of the ionosphere on radar signals propagated from a source on the surface of the Earth and received by instruments on the FORTE satellite at altitudes of 800 km. The author employs signals with a 90 MHz bandwidth centered at 240 MHz with a continuous digital recording period of 0.6 s.

Fitzgerald, T.J.

1998-08-17T23:59:59.000Z

389

A Second-Site Noncomplementation Screen for Modifiers of Rho1 Signaling during Imaginal Disc Morpogenesis in Drosophila  

E-Print Network [OSTI]

A Second-Site Noncomplementation Screen for Modifiers of Rho1 Signaling during Imaginal Disc Morphogenesis in Drosophila Kistie Patch, Shannon R. Stewart €a , Aaron Welch €b , Robert E. Ward, IV* Department of Molecular Biosciences, University... of Kansas, Lawrence, Kansas, United States of America Abstract Background: Rho1 is a small GTPase of the Ras superfamily that serves as the central component in a highly conserved signaling pathway that regulates tissue morphogenesis during development...

Patch, Kistie; Stewart, Shannon; Welch, Aaron; Ward, Robert

2009-10-23T23:59:59.000Z

390

Low Temperature and High Frequency Investigation of the Quantum Hall Effect  

E-Print Network [OSTI]

To study the properties of quantum Hall devices at microwave frequencies, I will build a high frequency probe capable of operating at ultra-low temperatures. The probe will be fitted with low loss coax to carry excitation photons at microwave frequencies to samples sitting at a temperature of 10 mK inside a dilution refrigerator. A second coax will bring the resulting signal back to detectors at room temperature. The project will involve the design of such a probe, its construction, and the eventual test of its performance through study of quantum Hall interferometers at ultra-low temperatures. I will look for evidence of quantum Hall-like states that emerge at relatively low magnetic fields when a twodimensional electron gas is illuminated by microwave photons. A successful observation

Tankut Can; St Draft

2009-01-01T23:59:59.000Z

391

Retarding field analyzer for ion energy distribution measurements at a radio-frequency biased electrode  

SciTech Connect (OSTI)

A retarding field energy analyzer designed to measure ion energy distributions impacting a radio-frequency biased electrode in a plasma discharge is examined. The analyzer is compact so that the need for differential pumping is avoided. The analyzer is designed to sit on the electrode surface, in place of the substrate, and the signal cables are fed out through the reactor side port. This prevents the need for modifications to the rf electrode--as is normally the case for analyzers built into such electrodes. The capabilities of the analyzer are demonstrated through experiments with various electrode bias conditions in an inductively coupled plasma reactor. The electrode is initially grounded and the measured distributions are validated with the Langmuir probe measurements of the plasma potential. Ion energy distributions are then given for various rf bias voltage levels, discharge pressures, rf bias frequencies - 500 kHz to 30 MHz, and rf bias waveforms - sinusoidal, square, and dual frequency.

Gahan, D.; Hopkins, M. B. [National Centre for Plasma Science and Technology, Dublin City University, Glasnevin, Dublin 9 (Ireland); Dolinaj, B. [Impedans Ltd., Invent Centre, Dublin City University, Glasnevin, Dublin 9 (Ireland)

2008-03-15T23:59:59.000Z

392

UTag: Long-range Ultra-wideband Passive Radio Frequency Tags  

SciTech Connect (OSTI)

Long-range, ultra-wideband (UWB), passive radio frequency (RF) tags are key components in Radio Frequency IDentification (RFID) system that will revolutionize inventory control and tracking applications. Unlike conventional, battery-operated (active) RFID tags, LLNL's small UWB tags, called 'UTag', operate at long range (up to 20 meters) in harsh, cluttered environments. Because they are battery-less (that is, passive), they have practically infinite lifetimes without human intervention, and they are lower in cost to manufacture and maintain than active RFID tags. These robust, energy-efficient passive tags are remotely powered by UWB radio signals, which are much more difficult to detect, intercept, and jam than conventional narrowband frequencies. The features of long range, battery-less, and low cost give UTag significant advantage over other existing RFID tags.

Dowla, F

2007-03-14T23:59:59.000Z

393

Turbine bucket natural frequency tuning rib  

DOE Patents [OSTI]

A tuning rib is added preferably in the aft cavity of a cored turbine bucket to alter the bucket's natural frequencies. The tuning rib may be a solid rib or a segmented rib and is particularly suited for altering high order frequency modes such as 2T, 4F and 1-3S. As such, detrimental crossings of natural bucket frequencies and gas turbine stimuli can be avoided to thereby improve the reliability of a gas turbine without impacting other features of the bucket that are important to the performance of the gas turbine.

Wang, John Zhiqiang (Greenville, SC); Norton, Paul Francis (Greenville, SC); Barb, Kevin Joseph (Halfmoon, NY); Jacala, Ariel Caesar-Prepena (Simpsonville, SC)

2002-01-01T23:59:59.000Z

394

High power radio frequency attenuation device  

DOE Patents [OSTI]

A resistor device for attenuating radio frequency power includes a radio frequency conductor connected to a series of fins formed of high relative magnetic permeability material. The fins are dimensional to accommodate the skin depth of the current conduction therethrough, as well as an inner heat conducting portion where current does not travel. Thermal connections for air or water cooling are provided for the inner heat conducting portions of each fin. Also disclosed is a resistor device to selectively alternate unwanted radio frequency energy in a resonant cavity.

Kerns, Quentin A. (Bloomingdale, IL); Miller, Harold W. (Winfield, IL)

1984-01-01T23:59:59.000Z

395

Nuclear sensor signal processing circuit  

DOE Patents [OSTI]

An apparatus and method are disclosed for a compact and temperature-insensitive nuclear sensor that can be calibrated with a non-hazardous radioactive sample. The nuclear sensor includes a gamma ray sensor that generates tail pulses from radioactive samples. An analog conditioning circuit conditions the tail-pulse signals from the gamma ray sensor, and a tail-pulse simulator circuit generates a plurality of simulated tail-pulse signals. A computer system processes the tail pulses from the gamma ray sensor and the simulated tail pulses from the tail-pulse simulator circuit. The nuclear sensor is calibrated under the control of the computer. The offset is adjusted using the simulated tail pulses. Since the offset is set to zero or near zero, the sensor gain can be adjusted with a non-hazardous radioactive source such as, for example, naturally occurring radiation and potassium chloride.

Kallenbach, Gene A. (Bosque Farms, NM); Noda, Frank T. (Albuquerque, NM); Mitchell, Dean J. (Tijeras, NM); Etzkin, Joshua L. (Albuquerque, NM)

2007-02-20T23:59:59.000Z

396

Alternative Fuels Data Center: Conversion Regulations  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Conversion Regulations Conversion Regulations to someone by E-mail Share Alternative Fuels Data Center: Conversion Regulations on Facebook Tweet about Alternative Fuels Data Center: Conversion Regulations on Twitter Bookmark Alternative Fuels Data Center: Conversion Regulations on Google Bookmark Alternative Fuels Data Center: Conversion Regulations on Delicious Rank Alternative Fuels Data Center: Conversion Regulations on Digg Find More places to share Alternative Fuels Data Center: Conversion Regulations on AddThis.com... Conversion Regulations All vehicle and engine conversions must meet standards instituted by the U.S. Environmental Protection Agency (EPA), the National Highway Traffic Safety Administration (NHTSA), and state agencies like the California Air Resources Board (CARB).

397

Cell signalling and phospholipid metabolism  

SciTech Connect (OSTI)

These studies explored whether phosphoinositide (PI) has a role in plants analogous to its role in animal cells. Although no parallel activity of PI in signal transduction was found in plant cells, activity of inositol phospholipid kinase was found to be modulated by light and by cell wall degrading enzymes. These studies indicate a major role for inositol phospholipids in plant growth and development as membrane effectors but not as a source of second messengers.

Boss, W.F.

1990-01-01T23:59:59.000Z

398

Regulation of Yersina pestis Virulence by AI-2 Mediated Quorum Sensing  

SciTech Connect (OSTI)

The proposed research was motivated by an interest in understanding Y. pestis virulence mechanisms and bacteria cell-cell communication. It is expected that a greater understanding of virulence mechanisms will ultimately lead to biothreat countermeasures and novel therapeutics. Y. pestis is the etiological agent of plague, the most devastating disease in human history. Y. pestis infection has a high mortality rate and a short incubation before mortality. There is no widely available and effective vaccine for Y. pestis and multi-drug resistant strains are emerging. Y. pestis is a recognized biothreat agent based on the wide distribution of the bacteria in research laboratories around the world and on the knowledge that methods exist to produce and aerosolize large amounts of bacteria. We hypothesized that cell-cell communication via signaling molecules, or quorum sensing, by Y. pestis is important for the regulation of virulence factor gene expression during host invasion, though a causative link had never been established. Quorum sensing is a mode of intercellular communication which enables orchestration of gene expression for many bacteria as a function of population density and available evidence suggests there may be a link between quorum sensing and regulation of Y. pesits virulence. Several pathogenic bacteria have been shown to regulate expression of virulence factor genes, including genes encoding type III secretion, via quorum sensing. The Y. pestis genome encodes several cell-cell signaling pathways and the interaction of at least three of these are thought to be involved in one or more modes of host invasion. Furthermore, Y. pestis gene expression array studies carried out at LLNL have established a correlation between expression of known virulence factors and genes involved in processing of the AI-2 quorum sensing signal. This was a basic research project that was intended to provide new insights into bacterial intercellular communication and how it is used to regulate virulence in Y. pestis. It is known that many bacteria use intercellular signaling molecules to orchestrate gene expression and cellular function. A fair amount is known about production and uptake of signaling molecules, but very little is known about how intercellular signaling regulates other pathways. Although several studies demonstrate that intercellular signaling plays a role in regulating virulence in other pathogens, the link between signaling and regulation of virulence has not been established. Very little work had been done directly with Y. pestis intercellular signaling apart from the work carried out at LLNL. The research we proposed was intended to both establish a causative link between AI-2 intercellular signaling and regulation of virulence in Y. pestis and elucidate the fate of the AI-2 signaling molecule after it is taken up and processed by Y. pestis. Elucidating the fate of AI-2 was expected to lead directly to the understanding of how AI-2 signal processing regulates other pathways as well as provide new insights in this direction.

Segelke, B; Hok, S; Lao, V; Corzett, M; Garcia, E

2010-03-29T23:59:59.000Z

399

THE REGULATION AND PACKAGING OF SYNAPTIC VESICLES AS RELATED TO RECRUITMENT WITHIN GLUTAMATERGIC SYNAPSES  

E-Print Network [OSTI]

THE REGULATION AND PACKAGING OF SYNAPTIC VESICLES AS RELATED TO RECRUITMENT WITHIN GLUTAMATERGIC SYNAPSES W.-H. WU AND R. L. COOPER * Department of Biology and Center for muscle Biology, University activated dur- ing rapid electrical stimulation (20 Hz) sparing the RP. When stimulation frequency is high

Cooper, Robin L.

400

A signal oriented stream processing system for pipeline monitoring  

E-Print Network [OSTI]

In this thesis, we develop SignalDB, a framework for composing signal processing applications from primitive stream and signal processing operators. SignalDB allows the user to focus on the signal processing task and avoid ...

Tokmouline, Timur

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

SRP RNA controls a conformational switch regulating the SRPSRP receptor interaction  

E-Print Network [OSTI]

SRP RNA controls a conformational switch regulating the SRP­SRP receptor interaction Saskia B Neher of the signal-recognition particle (SRP) with its receptor (SR) mediates co-translational protein targeting to the membrane. SRP and SR interact via their homologous core GTPase domains and N-terminal four-helix bundles (N

Walter, Peter

402

Regulation of Xylella fastidiosa virulence factors by c-di-GMP phosphodiesterases  

E-Print Network [OSTI]

, suggesting that PD1994 regulates DSF signaling by repressing rpfF expression. Additionally, the pd1994mutant showed overexpression of pd1617 and rpfG (with EAL and HD-GYP domains respectively, that may be responsible for c-di-GMP turnover), which suggested...

Ancona-Contreras, Veronica

2012-10-19T23:59:59.000Z

403

Component external leakage and rupture frequency estimates  

SciTech Connect (OSTI)

In order to perform detailed internal flooding risk analyses of nuclear power plants, external leakage and rupture frequencies are needed for various types of components - piping, valves, pumps, flanges, and others. However, there appears to be no up-to-date, comprehensive source for such frequency estimates. This report attempts to fill that void. Based on a comprehensive search of Licensee Event Reports (LERs) contained in Nuclear Power Experience (NPE), and estimates of component populations and exposure times, component external leakage and rupture frequencies were generated. The remainder of this report covers the specifies of the NPE search for external leakage and rupture events, analysis of the data, a comparison with frequency estimates from other sources, and a discussion of the results.

Eide, S.A.; Khericha, S.T.; Calley, M.B.; Johnson, D.A.; Marteeny, M.L.

1991-11-01T23:59:59.000Z

404

Spatial Frequency Filtering Using Nondelineated Thin Films  

Science Journals Connector (OSTI)

We present a new approach for achieving spatial frequency filtering in the analog domain. Our device, the Thin Film Spatial Filter, is a hybrid structure which combines the strengths of analog VLSI technology with the simplicity of a continuous sheet ...

J. Mcelvain; J. Langan; A. J. Heeger

1997-10-01T23:59:59.000Z

405

Laser Doppler vibrometer employing active frequency feedback  

SciTech Connect (OSTI)

We present a heterodyne Michelson interferometer for vibration measurement in which feedback is used to obviate the need to unwrap phase data. The Doppler shift of a vibrating target mirror is sensed interferometrically and compensated by means of a voltage-controlled oscillator driving an acousto-optic modulator. For frequencies within the servo bandwidth, the oscillator control voltage provides a direct measurement of the target velocity. Outside the servo bandwidth, phase-sensitive detection is used to evaluate high-frequency displacements. This approach is of great interest for the frequently-occurring situation where vibration amplitudes at low frequency exceed an optical wavelength, but knowledge of the vibration spectrum at high frequency is important as well.

Chijioke, Akobuije; Lawall, John

2008-09-20T23:59:59.000Z

406

Developing high-frequency equities trading models  

E-Print Network [OSTI]

The purpose of this paper is to show evidence that there are opportunities to generate alpha in the high frequency environment of the US equity market, using Principal Component Analysis (PCA hereafter) as a basis for short ...

Infantino, Leandro Rafael

2010-01-01T23:59:59.000Z

407

Calibration for Frequencies of Stellar Spectral Lines  

E-Print Network [OSTI]

When studying the expansion of the universe, a significant problem is measuring the red shifts of stellar absorption lines with sufficiently high accuracy; this requires extremely accurate reference frequencies for calibration. An important recent...

Gomez, Juana

2010-07-14T23:59:59.000Z

408

BIGHORNS - Broadband Instrument for Global HydrOgen ReioNisation Signal  

E-Print Network [OSTI]

The redshifted 21cm line of neutral hydrogen (HI), potentially observable at low radio frequencies (~50-200 MHz), should be a powerful probe of the physical conditions of the inter-galactic medium during Cosmic Dawn and the Epoch of Reionisation (EoR). The sky-averaged HI signal is expected to be extremely weak (~100 mK) in comparison to the foreground of up to 10000 K at the lowest frequencies of interest. The detection of such a weak signal requires an extremely stable, well characterised system and a good understanding of the foregrounds. Development of a nearly perfectly (~mK accuracy) calibrated total power radiometer system is essential for this type of experiment. We present the BIGHORNS (Broadband Instrument for Global HydrOgen ReioNisation Signal) experiment which was designed and built to detect the sky-averaged HI signal from the EoR at low radio frequencies. The BIGHORNS system is a mobile total power radiometer, which can be deployed in any remote location in order to collect radio-interference (...

Sokolowski, M; Wayth, R B; Tingay, S J; Clarke, N; Roberts, P; Waterson, M; Ekers, R D; Hall, P; Lewis, M; Mossammaparast, M; Padhi, S; Schlagenhaufer, F; Sutinjo, A; Tickner, J

2015-01-01T23:59:59.000Z

409

Effect of Pressure Transmission Lines on the Frequency Response of Pressure Transducers  

SciTech Connect (OSTI)

It is well known that the length and diameter of the transmission lines between a pressure transducer and the pressure source can significantly affect the dynamic frequency response of the transducer. A new lumped parameter model has been developed to predict the time and frequency response of any number of different transducers connected in parallel in a manifold. While the model is simple to apply, it can provide quantitative information given the transducer and transmission line characteristic parameters. More importantly, the model can be used to evaluate the measured, in-situ response. this provides the natural frequency and the effective damping which can then be used to generate a frequency response curve. The model is also useful for designing a new pressure transmission system, which will have the required frequency response. The model was qualified by comparison to measurements of the step-function pressure response of a number of different transducers and test installations. With the aid of the model, the system resonant frequency and damping can be determined. Additional damping can be added if necessary to prevent ringing of the signal and to assure an accurate pressure measurement with a flat frequency response. For all of the experimental systems evaluated in this work, the response at the natural frequency was significantly underdamped and ringing was observed. This means that to perform accurate measurements damping needs to be added to the system. It was observed that the use of flexible pressure lines versus hard lines does increase the damping and may therefore be useful in certain situations. Equations were developed to permit sizing an orifice to be added to the system to provide the necessary damping.

G.J. Kirouac

2000-11-13T23:59:59.000Z

410

Chapter 32 - Cellular Signaling in Dentin Repair and Regeneration  

Science Journals Connector (OSTI)

Abstract Injury to the dentin-pulp complex results in a variety of cellular responses that determine tooth vitality and survival. Initially, these responses center on the odontoblasts as the first line of defense and environmental sensors, but will subsequently encompass other cells in the pulp with a complex interplay being seen between regenerative responses involving odontoblasts and the inflammation associated with pulpal responses to injury. Local degradation of dentin matrix following injury will release bioactive molecules contributing to cellular signaling. While tissue repair and regeneration will likely occur only when infection and inflammation are under control, low-level cytokine stimulation during the earlier stages of dental disease, and possibly as resolution of inflammation ensues, may facilitate and promote reparative events. Whether odontoblasts survive the injurious challenge will determine if reactionary or reparative dentinogenesis occurs during repair and regeneration in the dentin-pulp complex. Notably the complexity of cellular responses is significantly greater for reparative dentinogenesis where stem/progenitor cell recruitment and induction of differentiation are required prior to up-regulation of cellular secretion of new matrix. Angiogeneic and neurogenic signaling are also important events during repair and regeneration. Improved understanding of cellular signaling following tooth injury helps underpin our approaches to diagnosis and treatment planning, as well as driving novel strategies for translation of new clinical therapeutic approaches.

Anthony (Tony) J. Smith; Paul R. Cooper

2015-01-01T23:59:59.000Z

411

Plasma Paramagnetism in Radio-Frequency Fields  

Science Journals Connector (OSTI)

A study by experiment, simulation, and theory has found that a plasma responds paramagnetically to the external rf magnetic field applied perpendicular to the static magnetic field with frequency ?frequency. This effect can be exploited in the rf plugging and heating of plasmas; it explains the earlier rf plugging experiment (type-3 coil) of Watari et al. at Nagoya and possibly the rf heating experiment of Dikii et al. on the Uragan stellarator.

Y. Ohsawa; M. Inutake; T. Tajima; T. Hatori; T. Kamimura

1979-10-22T23:59:59.000Z

412

Testosterone and 11-ketotestosterone have different regulatory effects on electric communication signals of male Brachyhypopomus gauderio  

Science Journals Connector (OSTI)

The communication signals of electric fish can be dynamic, varying between the sexes on a circadian rhythm and in response to social and environmental cues. In the gymnotiform fish Brachyhypopomus gauderio waveform shape of the electric organ discharge (EOD) is regulated by steroid and peptide hormones. Furthermore, EOD amplitude and duration change on different timescales and in response to different social stimuli, suggesting that they are regulated by different mechanisms. Little is known about how androgen and peptide hormone systems interact to regulate signal waveform. We investigated the relationship between the androgens testosterone (T) and 11-ketotestosterone (11-KT), the melanocortin peptide hormone ?-MSH, and their roles in regulating EOD waveform of male B. gauderio. Males were implanted with androgen (T, 11-KT, or blank), and injected with ?-MSH before and at the peak of androgen effect. We compared the effects of androgen implants and social interactions by giving males a size-matched male stimulus with which they could interact electrically. Social stimuli and both androgens increased EOD duration, but only social stimuli and 11-KT elevated amplitude. However, no androgen enhanced EOD amplitude to the extent of a social stimulus, suggesting that a yet unidentified hormonal pathway regulates this signal parameter. Additionally, both androgens increased response of EOD duration to ?-MSH, but only 11-KT increased response of EOD amplitude to ?-MSH. Social stimuli had no effect on EOD response to ?-MSH. The finding that EOD amplitude is preferentially regulated by 11-KT in B. gauderio may provide the basis for independent control of amplitude and duration.

Anna Goldina; Sat Gavassa; Philip K. Stoddard

2011-01-01T23:59:59.000Z

413

Signal Processing as a Tool to Enhance Productivity in Industry - Measurement and Cancelation of Periodic Signals.  

E-Print Network [OSTI]

??Preface This licentiate thesis summarizes my work within the field of Signal Processing during my time in Signal Control Sweden AB from 1987 to 2002.… (more)

Olsson, Sven

2006-01-01T23:59:59.000Z

414

Extremely high frequency RF effects on electronics.  

SciTech Connect (OSTI)

The objective of this work was to understand the fundamental physics of extremely high frequency RF effects on electronics. To accomplish this objective, we produced models, conducted simulations, and performed measurements to identify the mechanisms of effects as frequency increases into the millimeter-wave regime. Our purpose was to answer the questions, 'What are the tradeoffs between coupling, transmission losses, and device responses as frequency increases?', and, 'How high in frequency do effects on electronic systems continue to occur?' Using full wave electromagnetics codes and a transmission-line/circuit code, we investigated how extremely high-frequency RF propagates on wires and printed circuit board traces. We investigated both field-to-wire coupling and direct illumination of printed circuit boards to determine the significant mechanisms for inducing currents at device terminals. We measured coupling to wires and attenuation along wires for comparison to the simulations, looking at plane-wave coupling as it launches modes onto single and multiconductor structures. We simulated the response of discrete and integrated circuit semiconductor devices to those high-frequency currents and voltages, using SGFramework, the open-source General-purpose Semiconductor Simulator (gss), and Sandia's Charon semiconductor device physics codes. This report documents our findings.

Loubriel, Guillermo Manuel; Vigliano, David; Coleman, Phillip Dale; Williams, Jeffery Thomas; Wouters, Gregg A.; Bacon, Larry Donald; Mar, Alan

2012-01-01T23:59:59.000Z

415

Signal Processing in Acoustics: Science or Science Fiction?  

Science Journals Connector (OSTI)

Signal processing in acoustics is based on one fundamental concept—extracting critical information from noisy uncertain measurement data. Acoustical processing problems can lead to some complex and intricate paradigms to perform this extraction especially from noisy sometimes inadequate measurements. Whether the data are created using a seismic geophone sensor from a monitoring network or an array of hydrophone transducers located on the hull of an ocean?going vessel the basic processing problem remains the same—extract the useful information. Techniques in signal processing (e.g. filtering Fourier transforms time?frequency and wavelet transforms) are effective; however as the underlying acoustical process generating the measurements becomes more complex the resulting processor may require more and more information about the process phenomenology to extract the desired information. The challenge is to formulate a meaningful strategy that is aimed at performing the processing required even in the face of these high uncertainties. In this article we briefly discuss this underlying signal processing philosophy from a “bottoms?up” perspective enabling the problem to dictate the solution rather than visa?versa. Once accomplished we ask ourselves the final and telling question “Did it work or are we kidding ourselves?” Are the results science or are they science fiction?

James V. Candy

2008-01-01T23:59:59.000Z

416

Evolution of the 21 cm signal throughout cosmic history  

E-Print Network [OSTI]

The potential use of the redshifted 21 cm line from neutral hydrogen for probing the epoch of reionization is motivating the construction of several low-frequency interferometers. There is also much interest in the possibility of constraining the initial conditions from inflation and the nature of the dark matter and dark energy by probing the power-spectrum of density perturbations in three dimensions and on smaller scales than probed by the microwave background anisotropies. Theoretical understanding of the 21 cm signal has been fragmented into different regimes of physical interest. In this paper, we make the first attempt to describe the full redshift evolution of the 21 cm signal between 0neutral fraction, as well as the Lyman alpha flux, and allow for a post-reionization signal from damped Ly alpha systems. Our comprehensive analysis provides a useful foundation for optimizing the design of future arrays whose goal is to separate the particle physics from the astrophysics, either by probing the peculiar velocity distortion of the 21 cm power spectrum, or by extending the 21 cm horizon to z > 25 before the first galaxies had formed, or to z < 6 when the residual pockets of hydrogen trace large scale structure.

Jonathan R. Pritchard; Abraham Loeb

2008-02-15T23:59:59.000Z

417

Knowledge representation of signal transduction pathways  

Science Journals Connector (OSTI)

......University Press 2001 Original Paper Knowledge representation of signal transduction...topic that encompasses a large body of knowledge about the biochemical mechanisms. Since most of the knowledge of signal transduction resides in scientific......

Ken-ichiro Fukuda; Toshihisa Takagi

2001-09-01T23:59:59.000Z

418

Evaluation of traffic signal controller transition methods  

E-Print Network [OSTI]

A coordinated signal system achieves the best traffic progression when the signal plans are optimized at the correct offsets and intervals. When traffic conditions change and a transition to a new timing plan is warranted, it is important to reach...

Hamilton, Curtis Lloyd

2000-01-01T23:59:59.000Z

419

Seven Traffic Signals in Two Minutes  

Broader source: Energy.gov [DOE]

Topeka, Kansas has activated the first of three key traffic corridors to receive a "green light tunnel," a real-time adaptive traffic signal system that synchronizes signals to create a series of...

420

MICROFLUIDIC CONTROL OF STEM CELL DIFFUSIBLE SIGNALING  

E-Print Network [OSTI]

MICROFLUIDIC CONTROL OF STEM CELL DIFFUSIBLE SIGNALING Katarina Blagovi, Lily Y. Kim, Alison M cell differentiation. KEYWORDS: Embryonic stem cells, microfluidic perfusion, diffusible signaling; they secrete molecules to which they respond. Microfluidics offers a potential solution to this challenge

Voldman, Joel

Note: This page contains sample records for the topic "frequency regulation signal" 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

LHC Signals from Warped Extra Dimensions  

E-Print Network [OSTI]

do mention, in the context of LHC signals, that suppressedSU-4252-838, YITP-SB-06-43 LHC Signals from Warped Extrathe Large Hadron Collider (LHC) in the framework of a warped

Agashe, K.

2009-01-01T23:59:59.000Z

422

2011 Air Quality Regulations Report | Department of Energy  

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

Air Quality Regulations Report 2011 Air Quality Regulations Report 2011 Air Quality Regulations Report120111.pdf More Documents & Publications 2011:...

423

Self-regulated reionization  

E-Print Network [OSTI]

Recently, we have presented the first large-scale radiative transfer simulations of reionization. Here we present new simulations which extend the source halo mass range downward to 10^8M_solar, to capture the full range of halo masses thought to be primarily responsible for reionization by their star formation following atomic hydrogen radiative cooling and gravitational collapse. Haloes below about 10^9M_solar, however, are subject to Jeans-mass filtering in the ionized regions, which suppresses their baryonic content and their ability to release ionizing radiation. By including these smaller-mass haloes but accounting for their suppression, too, we find that reionization is ``self-regulating,'' as follows. As the mean ionized fraction rises, so does the fraction of the volume within which suppression occurs. Hence, the degree of suppression is related to the mean ionized fraction. Since low-mass haloes with high emissivity achieve a given mean ionized fraction earlier than do those with low efficiency, Jeans-mass filtering compensates for the difference in the emissivity of the suppressible haloes in these two cases. As a result, in the presence of lower-mass source haloes, reionization begins earlier, but the later stages of reionization and the time of overlap are dictated by the efficiency of the higher-mass haloes, independent of the efficiency of the suppressible, lower-mass haloes. Reionization histories consistent with current observational constraints are shown to be achievable with standard stellar sources in haloes above 10^8M_solar. Neither minihalos nor exotic sources are required, and the phenomenon of ``double reionization'' previously suggested does not occur. (abridged)

Ilian T. Iliev; Garrelt Mellema; Paul R. Shapiro; Ue-Li Pen

2006-07-22T23:59:59.000Z

424

Chapter 2 of the Wyoming Public Service Commission Regulations...  

Open Energy Info (EERE)

the Wyoming Public Service Commission Regulations: General Regulations Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- RegulationRegulation:...

425

Vermont Hazardous Waste Management Regulations (Vermont)  

Broader source: Energy.gov [DOE]

These regulations are intended to protect public health and the environment by comprehensively regulating the generation, storage, collection, transport, treatment, disposal, use, reuse, and...

426

Price regulation for waste hauling franchises in California: an examination of how regulators regulate pricing and the effects of competition on regulated markets  

E-Print Network [OSTI]

Thomadakis, Stavros. “Price Regulation Under Uncertainty in698. Bös, Dieter. Pricing and Price Regulation. Elsevier.Optimal Structure of Public Prices. ” The American Economic

Seltzer, Steven A.

2011-01-01T23:59:59.000Z

427

Aquifer Protection Area Land Use Regulations (Connecticut)  

Broader source: Energy.gov [DOE]

These regulations describe allowable activities within aquifer protection areas, the procedure by which such areas are delineated, and relevant permit requirements. The regulations also describe...

428

Camptothecine, a selective plant growth regulator  

Science Journals Connector (OSTI)

Camptothecine, a selective plant growth regulator ... The literature documents several hundred plant products that appear to exhibit growth-regulating activity. ...

J. George Buta; Joseph F. Worley

1976-05-01T23:59:59.000Z

429

International Electricity Regulation | Department of Energy  

Office of Environmental Management (EM)

Regulation International Electricity Regulation U.S. trade in electric energy with Canada and Mexico is rising, bringing economic and reliability benefits to the United States and...

430

Vehicle Technologies Office: Regulated Fleets | Department of...  

Energy Savers [EERE]

Alternative Fuels Vehicle Technologies Office: Regulated Fleets Vehicle Technologies Office: Regulated Fleets The Office of Energy Efficiency and Renewable Energy (EERE) manages...

431

Alaska ADEC Wetlands Regulation | Open Energy Information  

Open Energy Info (EERE)

Regulation Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Alaska ADEC Wetlands Regulation Author Alaska Division of Water Published Alaska Department...

432

Prospects For High Frequency Burst Searches Following Binary Neutron Star Coalescence With Advanced Gravitational Wave Detectors  

E-Print Network [OSTI]

The equation of state plays a critical role in the physics of the merger of two neutron stars. Recent numerical simulations with microphysical equation of state suggest the outcome of such events depends on the mass of the neutron stars. For less massive systems, simulations favor the formation of a hypermassive, quasi-stable neutron star, whose oscillations produce a short, high frequency burst of gravitational radiation. Its dominant frequency content is tightly correlated with the radius of the neutron star, and its measurement can be used to constrain the supranuclear equation of state. In contrast, the merger of higher mass systems results in prompt gravitational collapse to a black hole. We have developed an algorithm which combines waveform reconstruction from a morphology-independent search for gravitational wave transients with Bayesian model selection, to discriminate between post-merger scenarios and accurately measure the dominant oscillation frequency. We demonstrate the efficacy of the method using a catalogue of simulated binary merger signals in data from LIGO and Virgo, and we discuss the prospects for this analysis in advanced ground-based gravitational wave detectors. From the waveforms considered in this work and assuming an optimally oriented source, we find that the post-merger neutron star signal may be detectable by this technique to $\\sim 10\\text{--}25$\\,Mpc. We also find that we successfully discriminate between the post-merger scenarios with $\\sim 95\\%$ accuracy and determine the dominant oscillation frequency of surviving post-merger neutron stars to within $\\sim 10$\\,Hz, averaged over all detected signals. This leads to an uncertainty in the estimated radius of a non-rotating 1.6\\,M$_{\\odot}$ reference neutron star of $\\sim 100\\,$m.

J. Clark; A. Bauswein; L. Cadonati; H. -T. Janka; C. Pankow; N. Stergioulas

2014-06-20T23:59:59.000Z

433

Private Regulation of Consumer Arbitration  

E-Print Network [OSTI]

Arbitration providers, such as the American Arbitration Association (“AAA”) and JAMS, have promulgated due process protocols to regulate the fairness of consumer and employment arbitration agreements. A common criticism of these due process...

Drahozal, Christopher R.; Zyontz, Samantha

2012-01-01T23:59:59.000Z

434

Kansas Air Quality Regulations (Kansas)  

Broader source: Energy.gov [DOE]

All new air contaminant emission sources or alterations to emission sources that are required to be reported shall be in compliance with all applicable emission control regulations at the time that...

435

Water Quality Regulations (Rhode Island)  

Broader source: Energy.gov [DOE]

The purpose of these regulations is to establish water quality standards for the state's surface waters. These standards are intended to restore, preserve and enhance the physical, chemical and...

436

Environmental Regulations | Open Energy Information  

Open Energy Info (EERE)

do: add table This article is a stub. You can help OpenEI by expanding it. Retrieved from "http:en.openei.orgwindex.php?titleEnvironmentalRegulations&oldid542702"...

437

California Energy Commission PROPOSED REGULATIONS  

E-Print Network [OSTI]

California Energy Commission PROPOSED REGULATIONS ENFORCEMENT PROCEDURES CALIFORNIA ENERGY COMMISSION Edmund G. Brown Jr., Governor FEBRUARY 2013 CEC3002013002SD #12;CALIFORNIA ENERGY COMMISSION Lorraine Gonzalez Angela Gould Primary Authors and Project Managers Kate Zocchetti

438

Ground Water Management Regulations (Louisiana)  

Broader source: Energy.gov [DOE]

The rules and regulations apply to the management of the state's ground water resources. In addition, the Commissioner of Conservation has recommended that oil and gas operators with an interest...

439

Electromagnetic partner of the gravitational signal during accretion onto black holes  

E-Print Network [OSTI]

We investigate the generation of electromagnetic and gravitational radiation in the vicinity of a perturbed Schwarzschild black hole. The gravitational perturbations and the electromagnetic field are studied by solving the Teukolsky master equation with sources, which we take to be locally charged, radially infalling, matter. Our results show that, in addition to the gravitational wave generated as the matter falls into the black hole, there is also a burst of electromagnetic radiation. This electromagnetic field has a characteristic set of quasinormal frequencies, and the gravitational radiation has the quasinormal frequencies of a Schwarzschild black hole. This scenario allows us to compare the gravitational and electromagnetic signals that are generated by a common source.

Juan Carlos Degollado; Victor Gualajara; Claudia Moreno; Darío Núńez

2014-10-21T23:59:59.000Z

440

Atmospheric glow discharges from the high-frequency to very high-frequency bands  

Science Journals Connector (OSTI)

This letter reports an experimental investigation of an atmospheric glow discharge in both the high-frequency (HF) band of 3–30 MHz and the very high frequency band of 30–300 MHz. At constant input power increased frequency is found to change little the electron density and to reduce slightly the electron excitation temperature. Significantly an eightfold frequency increase from 20 to 80 MHz leads to a 20-fold increase in the maximum plasma power without plasma constriction. The maximum power density of 355 ? W / cm 3 achieved at 80 MHz is far greater than those reported in the HF band.

J. L. Walsh; F. Iza; M. G. Kong

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Influence of excitation frequency on plasma parameters and etching characteristics of radio-frequency discharges  

Science Journals Connector (OSTI)

Abstract Plasma parameters such as electron density, electron-collision rate, resonance frequency and the bias voltage were shown to be important for the characterization of radio-frequency (RF) plasmas. By means of self-excited electron resonance spectroscopy (SEERS), the plasma parameters were compared at two different frequencies, 13.56 \\{MHz\\} and 40.68 MHz, in argon, oxygen, fluorine and their mixtures at low pressure. Upon increasing the generator frequency, more RF power has to be applied to achieve the same bias voltage. At the lower pressure, the bias voltage indicates the mean energy of the ions impacting on the substrate and causing damage at the surface. The experimental results show that generally more power was dissipated in the plasma instead of the sheath if the frequency of the substrate generator was decreased. This results in a significantly higher electron density at the higher frequency. The increase of mean ion energy, owing to lower sheath thickness, has to be taken into account as a second-order effect. In order to show the influence of frequency for process applications, the etch rate of SiO2 on silicon was determined in CF4. For the same generator power, there is no well-pronounced dependence of the etch rate of SiO2 on silicon (CF4) on the frequency. For the same bias voltage, the etch rate of SiO2 increases roughly with the frequency.

M. Klick; L. Eichhorn; W. Rehak; M. Kammeyer; H. Mischke

1999-01-01T23:59:59.000Z

442

Atmospheric glow discharges from the high-frequency to very high-frequency bands  

SciTech Connect (OSTI)

This letter reports an experimental investigation of an atmospheric glow discharge in both the high-frequency (HF) band of 3-30 MHz and the very high frequency band of 30-300 MHz. At constant input power, increased frequency is found to change little the electron density and to reduce slightly the electron excitation temperature. Significantly, an eightfold frequency increase from 20 to 80 MHz leads to a 20-fold increase in the maximum plasma power without plasma constriction. The maximum power density of 355 W/cm{sup 3} achieved at 80 MHz is far greater than those reported in the HF band.

Walsh, J. L.; Iza, F.; Kong, M. G. [Department of Electronic and Electrical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU (United Kingdom)

2008-12-22T23:59:59.000Z

443

Broadband low?frequency sound radiator with high?frequency pump resonator.  

Science Journals Connector (OSTI)

A new type of underwater low?frequency radiator is described. Operation of the radiator is based on the nonlinear conversion of high?frequency acoustic pump energy to low?frequency sound pulsation of the water volume of the open acoustic pump resonator. High?intensity pump waves in the resonator produce cavitation. Water containing bubbles is highly nonlinear (hundreds and even thousands of times more than pure water) and dispersive. Both of these factors and also the use of the pump resonator promote much stronger conversion of pump energy to low?frequency sound in comparison with a parametric radiator. The calculation of the acoustical characteristics is presented.

Dimitri M. Donskoy

1992-01-01T23:59:59.000Z

444

A Self-Regulation Program for Maintenance of Weight Loss  

Science Journals Connector (OSTI)

...diet, activity, and use of behavioral strategies. At each assessment, participants were weighed with a calibrated scale while they were wearing light street clothes, and they completed the Paffenbarger Physical Activity Questionnaire and the Block Food Frequency Questionnaire. They also reported their... This maintenance program was based on self-regulation theory that included daily self-weighing. The authors tested the efficacy of delivering the program face to face or over the Internet as compared with the provision of a quarterly newsletter. The interventions improved maintenance of weight loss, particularly when delivered face to face.

Wing R.R.Tate D.F.Gorin A.A.Raynor H.A.Fava J.L.

2006-10-12T23:59:59.000Z

445

Modelling Quantum Mechanics by the Quantumlike Description of the Electric Signal Propagation in Transmission Lines  

E-Print Network [OSTI]

It is shown that the transmission line technology can be suitably used for simulating quantum mechanics. Using manageable and at the same time non-expensive technology, several quantum mechanical problems can be simulated for significant tutorial purposes. The electric signal envelope propagation through the line is governed by a Schrodinger-like equation for a complex function, representing the low-frequency component of the signal, In this preliminary analysis, we consider two classical examples, i.e. the Frank-Condon principle and the Ramsauer effect.

R. Fedele; M. A. Man'ko; V. I. Man'ko; V. G. Vaccaro

2002-07-30T23:59:59.000Z

446

Study of the OCS6 Lattice Using Frequency Maps  

E-Print Network [OSTI]

Frequency maps for the OCS5 and OCS6Frequency maps for the OCS6 lattice for a tune of Q x =tunes. . . . . . . . . Frequency maps for the OCS6 lattice

Reichel, Ina

2007-01-01T23:59:59.000Z

447

Diversity–disturbance relationships: frequency and intensity interact  

Science Journals Connector (OSTI)

...relationship depended on the frequency of disturbances by the...diversity as the response variable and frequency and intensity as factors...unequivocally that the frequency-intensity interaction drives the coexistence of ecologically...

2012-01-01T23:59:59.000Z

448

Signal machines : localization of isolated accumulation Signal machines : localization of isolated  

E-Print Network [OSTI]

Signal machines : localization of isolated accumulation Signal machines : localization of isolated'Orléans, Orléans, FRANCE 6 mars 2011 Journées Calculabilités Paris 1 / 39 #12;Signal machines : localization of isolated accumulation 1 Signal machines and isolated accumulations 2 Necessary conditions

Durand-Lose, JĂ©rĂŽme

449

18 IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING, VOL. 2, NO. 1, FEBRUARY 2008 Cooperative Sensing for Primary  

E-Print Network [OSTI]

- nitive radio users who cooperate with each other in trying to de- tect licensed transmissions. Assuming, the use of radio frequency bands has been regulated in most countries through the process of spectrum, measurements conducted have sug- gested that most licensed spectrum is often under-utilized with large spectral

Veeravalli, Venugopal

450

Identification of novel ionizing radiation signaling targets in reconstituted human skin  

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

of novel ionizing radiation signaling targets in reconstituted human skin of novel ionizing radiation signaling targets in reconstituted human skin Feng Yang, Katrina M. Waters, Bobbie-Jo Webb-Robertson, Lye-Meng Markillie, Rachel M. Wirgau, Shawna M. Hengel, Ljiljana Pasa-Tolic, and David L. Stenoien. Pacific Northwest National Laboratory Our focus has been on identifying the early events that occur after low dose ionizing radiation exposure that precede and often regulate downstream events such as altered transcription, protein secretion and epigenetic regulation. Phosphorylation is one of the earliest detectible events that occurs following radiation exposure and plays important roles in multiple biological pathways including DNA damage repair, transcription, apoptosis, and cell cycle progression. Very robust

451

Adaptive regulation system for a linear alternator driven by a free-piston stirling engine  

SciTech Connect (OSTI)

This patent describes an adaptive load regulator for a linear alternator driven by a free piston Stirling engine, having a heat energy source, the alternator having an armature circuit and a useful load connected to the armature circuit, and further including a stepped armature system for controlling the stroke amplitude of the Stirling engine. The regulator and the stepped armature system comprise: (a) a controllably variable conductance shunted across the armature; (b) a negative feedback control circuit comprising: (i) a summing circuit; (ii) a voltage detector means connected to the armature circuit for detecting a signal which is proportional to the alternator output voltage and connected to apply the detected signal to an input of the summing circuit; (iii) a reference signal source connected to apply its reference signal to another input of the summing circuit; and (iv) an amplifier having its input connected to the output of the summing circuit and its output connected to the control input of the controllable, variable conductance for applying a signal which is proportional to the difference of the input signals at the summing circuit to a control input of the variable conductance for varying the conductance in proportion to detected voltage changes; (c) an armature coil divided into a plurality of coils serially connected by one or more taps; (d) circuit means having an input connected to the useful load for detecting the steady state output power demand of the useful load and (e) logic switching means.

Redlich, R.W.

1987-02-10T23:59:59.000Z

452

Beyond QoS signaling: A new generic IP signaling framework  

Science Journals Connector (OSTI)

This paper describes the design principles and an introduction of a framework and protocols for generic IP signaling, namely the Cross-Application Signaling Protocol (CASP) and its signaling applications. While reusing certain features of the existing RSVP protocol, CASP overcomes its shortcomings and may be deployed as a replacement technology to provide simpler, mobility-supported, more extensible and more secure signaling services in IP based networks. This paper discusses challenges of today’s IP signaling protocols and addresses fundamentals and key aspects of CASP and its current signaling applications. In addition, a comparison with previous signaling protocol proposals and an outlook of future work in this area are also given.

Xiaoming Fu; Hannes Tschofenig; Dieter Hogrefe

2006-01-01T23:59:59.000Z

453

A Nodal- and ALK4-independent Signaling Pathway Activated by Cripto-1 through Glypican-1 and c-Src  

Science Journals Connector (OSTI)

...5562-5569, 2001. 13 Tsuda M., Kamimura K., Nakato H., Archer M., Staatz W., Fox B., Humphrey M., Olson S., Futch T., Kaluza V., Siegfried E., Stam L., Selleck S. B. The cell-surface proteoglycan Dally regulates Wingless signalling...

Caterina Bianco; Luigi Strizzi; Aasia Rehman; Nicola Normanno; Christian Wechselberger; Youping Sun; Nadia Khan; Morihisa Hirota; Heather Adkins; Kevin Williams; Richard U. Margolis; Michele Sanicola; David S. Salomon

2003-03-15T23:59:59.000Z

454

Wide-open, high-resolution microwave/millimeter-wave Doppler frequency shift estimation using photonics technology  

E-Print Network [OSTI]

Today, wide-open, high-resolution Doppler frequency shift (DFS) estimation is essential for radar, microwave/millimeter-wave, and communication systems. Using photonics technology, an effective approach is proposed and experimentally demonstrated, providing a high-resolution and frequency-independent solution. In the approach consisting of two cascaded opto-electronic modulators, DFS between the transmitted microwave/ millimeter-wave signal and the received echo signal is mapped into a doubled spacing between two target optical sidebands. Subsequently, the DFS is then estimated through the spectrum analysis of a generated low-frequency electrical signal, with an improved resolution by a factor of 2. In experiments, DFSs from -90 to 90 KHz are successfully estimated for microwave/millimeter-wave signals at 10, 15, and 30 GHz, where estimation errors keep lower than +/- 5e-10 Hz. For radial velocity measurement, these results reveal a range from 0 to 900 m/s (0 to 450 m/s) and a resolution of 1e-11 m/s (5e-12 m...

Zou, Xihua; Lu, Bing; Pan, Wei; Yan, Lianshan; Shao, Liyang

2014-01-01T23:59:59.000Z

455

Frequency Instability Problems in North American Interconnections  

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

Frequency Instability Problems in Frequency Instability Problems in North American Interconnections May 1, 2011 DOE/NETL-2011/1473 Frequency Instability Problems in North American Interconnections Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement,

456

Frequency dependence of the Chiral Vortical Effect  

E-Print Network [OSTI]

We study the frequency dependence of all the chiral vortical and magnetic conductivities for a relativistic gas of free chiral fermions and for a strongly coupled conformal field theory with holographic dual in four dimensions. Both systems have gauge and gravitational anomalies, and we compute their contribution to the conductivities. The chiral vortical conductivities and the chiral magnetic conductivity in the energy current show a frequency dependence in the form of a delta centered at zero frequency. This highly discontinuous behavior is a natural consequence of the Ward identities that include the energy momentum tensor. We discuss the physical interpretation of this result and its possible implications for the quark gluon plasma as created in heavy ion collisions. In the Appendix we discuss why the chiral magnetic effect seems to vanish in the consistent current for a particular implementation of the axial chemical potential.

Karl Landsteiner; Eugenio Megias; Francisco Peńa Benítez

2014-09-18T23:59:59.000Z

457

INSTALLATION, COMMISSIONING AND TROUBLE SHOOTING OF VARIABLE FREQUENCY DRIVE.  

E-Print Network [OSTI]

??In this thesis, the installation of variable frequency drive on board a ship is introduced briefly. In this particular study the variable frequency drive was… (more)

Kuituniemi, Santtu

2013-01-01T23:59:59.000Z

458

p53 Modulates Hsp90 ATPase Activity and Regulates Aryl Hydrocarbon Receptor Signaling  

Science Journals Connector (OSTI)

...Otolaryngology-Head and Neck Surgery, The Johns Hopkins Medical Institutions, Baltimore, Maryland; and 5 Department of Medical and Molecular Genetics, Indiana University...obtained from Tocris Bioscience. Western Lighting Plus ECL was purchased from Perkin Elmer...

Amit Kochhar; Levy Kopelovich; Erika Sue; Joseph B. Guttenplan; Brittney-Shea Herbert; Andrew J. Dannenberg; and Kotha Subbaramaiah

2014-06-01T23:59:59.000Z

459

p53 Modulates Hsp90 ATPase Activity and Regulates Aryl Hydrocarbon Receptor Signaling  

Science Journals Connector (OSTI)

...Baltimore, Maryland; and 5 Department of Medical and Molecular Genetics, Indiana University...obtained from Tocris Bioscience. Western Lighting Plus ECL was purchased from Perkin Elmer...Breast Cancer Research Foundation. The costs of publication of this article were defrayed...

Amit Kochhar; Levy Kopelovich; Erika Sue; Joseph B. Guttenplan; Brittney-Shea Herbert; Andrew J. Dannenberg; and Kotha Subbaramaiah

2014-06-01T23:59:59.000Z

460

Two Direct Targets of Cytokinin Signaling Regulate Symbiotic Nodulation in Medicago truncatula  

Science Journals Connector (OSTI)

...5 min at room temperature twice, and water at room temperature for 1 min. All washes...2004). WebLogo: A sequence logo generator. Genome Res. 14 : 1188-1190. DAgostino...organogenesis, allowing them to fix atmospheric nitrogen. To identify direct links between...

Federico Ariel; Marianne Brault-Hernandez; Carole Laffont; Emeline Huault; Mathias Brault; Julie Plet; Michael Moison; Sandrine Blanchet; Jean Laurent Ichanté; Mireille Chabaud; Sébastien Carrere; Martin Crespi; Raquel L. Chan; Florian Frugier

2012-09-28T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Glioblastoma Stem Cells Are Regulated by Interleukin-8 Signaling in a Tumoral Perivascular Niche  

Science Journals Connector (OSTI)

...polymeric scaffolds were fabricated using a gas-foaming, particulate leaching method...high-pressure (800 psi) CO2 and releasing gas quickly using a pressure vessel (Parr Instruments...Lathia JD , Li M, Hall PE, Gallagher J, Hale JS, Wu Q, et alLaminin alpha 2 enables...

David W. Infanger; YouJin Cho; Brina S. Lopez; Sunish Mohanan; S. Chris Liu; Demirkan Gursel; John A. Boockvar; and Claudia Fischbach

2013-12-01T23:59:59.000Z

462

Regulation and Synchronization of the Master Circadian Clock by Purinergic Signaling from Suprachiasmatic Nucleus Astrocytes  

E-Print Network [OSTI]

in coordinating system-level physiological rhythms that are entrained to environmental light cues. Many of these neurons and glia are individual circadian oscillators, and the cellular mechanisms that couple them into ensemble oscillations are emerging. Adenosine...

Womac, Alisa Diane

2012-10-19T23:59:59.000Z

463

A MycGroucho complex integrates EGF and Notch signaling to regulate neural development  

E-Print Network [OSTI]

is critical during morphogenesis and misregulated in cancer. Using DNA adenine methyltransferase (Dam)ID-of-function mammalian Myc mutants exhibit embryonic lethality probably because of Myc's role in organogen- esis (1, 2 a microarray-based genomic chromatin profiling method termed DNA adenine methyltrans- ferase (Dam)ID

Parkhurst, Susan

464

Arabidopsis Plastid AMOS1/EGY1 Integrates Abscisic Acid Signaling to Regulate Global Gene Expression  

E-Print Network [OSTI]

genes and maintains chloroplast functionality under NH4 + stress. Importantly, abi4 mutants defective and Kronzucker, 2002; von Wirén and Merrick, 2004). Extensive studies have been car- ried out that dissect

Kronzucker, Herbert J.

465

The DNA Damage Response Signaling Cascade Regulates Proliferation of the Phytopathogenic Fungus Ustilago maydis in Planta  

Science Journals Connector (OSTI)

...and Sanchez, 2004) in a broad range of eukaryotes, including U. maydis...double-strand breaks in DNA; and ionizing radiation (IR), which generates double-strand...were irradiated at the indicated dose after being spotted. The spots...

Carmen de Sena-Tomås; Alfonso Fernåndez-Álvarez; William K. Holloman; José Pérez-Martín

2011-04-08T23:59:59.000Z

466

Two Direct Targets of Cytokinin Signaling Regulate Symbiotic Nodulation in Medicago truncatula  

Science Journals Connector (OSTI)

...independent transgenic roots). A Kruskal-Wallis test was performed to assess...transgenic roots/construct), and a Kruskal-Wallis test was performed to assess...transgenic roots/genotype), and a Kruskal-Wallis (A) or Mann-Whitney [(C...

Federico Ariel; Marianne Brault-Hernandez; Carole Laffont; Emeline Huault; Mathias Brault; Julie Plet; Michael Moison; Sandrine Blanchet; Jean Laurent Ichanté; Mireille Chabaud; Sébastien Carrere; Martin Crespi; Raquel L. Chan; Florian Frugier

2012-09-28T23:59:59.000Z

467

Chloroplast Signaling and LESION SIMULATING DISEASE1 Regulate Crosstalk between Light Acclimation and Immunity in Arabidopsis  

Science Journals Connector (OSTI)

...thaliana leaves in response to excess excitation energy (EEE) is...1999; Niyogi, 2000). Excess excitation energy (EEE...CTAB extraction buffer, lithium chloride precipitation followed...the first hybridization, an excess of driver cDNA was hybridized...

Per MĂŒhlenbock; Magdalena SzechyĆ?ska-Hebda; Marian PĆ?aszczyca; Marcela Baudo; Alfonso Mateo; Philip M. Mullineaux; Jane E. Parker; Barbara KarpiĆ?ska; StanisĆ?aw KarpiĆ?ski

2008-09-12T23:59:59.000Z

468

Regulation of Glycogen Synthase Kinase 3? and Downstream Wnt Signaling by Axin  

Science Journals Connector (OSTI)

...GID-2/His (up to 200-fold molar excess), and each mixture was then assayed...His was present at a 200-fold molar excess. Taking these findings together with...effect of the GID (Fig. and ) as well as lithium () and is a likely explanation for the...

Chester M. Hedgepeth; Matthew A. Deardorff; Kathleen Rankin; Peter S. Klein

1999-10-01T23:59:59.000Z

469

Regulation of Human Nitric Oxide Synthase 2 Expression by Wnt ?-Catenin Signaling  

Science Journals Connector (OSTI)

...Briefly, rats were injected with lithium chloride (LiCl) through the...for binding with 100-fold excess unlabeled WT or mutant (MUT...expression in HCT116 cells. Lithium chloride (LiCl), an inhibitor...beta Catenin 7447-41-8 Lithium Chloride EC 1.14.13.39...

Qiang Du; Kyung Soo Park; Zhong Guo; Peijun He; Makoto Nagashima; Lifang Shao; Rohit Sahai; David A. Geller; and S. Perwez Hussain

2006-07-15T23:59:59.000Z

470

Convergent Starvation Signals and Hormone Crosstalk in Regulating Nutrient Mobilization upon Germination in Cereals  

Science Journals Connector (OSTI)

...hydrolysis by the coordinated action of a battery of hydrolases (Yu et al., 1996; Woodger...ensures maximal expression of a whole battery of hydrolases and related proteins to...Probes Master (Roche), and water. Thermal cycling was performed on a SYBR Green...

Ya-Fang Hong; Tuan-Hua David Ho; Chin-Feng Wu; Shin-Lon Ho; Rong-Hwei Yeh; Chung-An Lu; Peng-Wen Chen; Lin-Chih Yu; Annlin Chao; Su-May Yu

2012-07-05T23:59:59.000Z

471

PHLPP : a novel family of phosphatases that are critical regulators of iIntracellular signaling pathways  

E-Print Network [OSTI]

PH domain, Leucine rich repeat (LRR) region, PP2C domain, and PDZ binding motif. (B) Phylogenetic tree

Brognard, John F.

2008-01-01T23:59:59.000Z

472

Regulation of endothelial MAPK/ERK signalling and capillary morphogenesis by low-amplitude electric field  

Science Journals Connector (OSTI)

...cavies contains a powerful battery. Am. J. Physiol. 242...Byrne 1995 The effects of non-thermal pulsed electromagnetic energy...and R. Kuokka 2002 Non-thermal activation of the hsp27/p38MAPK...38 Foster, K. R. 2000 Thermal and nonthermal mechanisms of...

2013-01-01T23:59:59.000Z

473

Vasopressin/Oxytocin-Related Signaling Regulates Gustatory Associative Learning in C. elegans  

Science Journals Connector (OSTI)

...Liesbet Temmerman Nick Suetens Suzanne Rademakers Gert Jansen Liliane Schoofs 1Department...5.986 11867526 18 Hukema R. K. Rademakers S. Jansen G. , Gustatory plasticity...994408 18984564 19 Hukema R. K. Rademakers S. Dekkers M. P. Burghoorn J. Jansen...

Isabel Beets; Tom Janssen; Ellen Meelkop; Liesbet Temmerman; Nick Suetens; Suzanne Rademakers; Gert Jansen; Liliane Schoofs

2012-10-26T23:59:59.000Z

474

Cannabinoid Regulation of Serotonin 2A (5-HT2A) Receptor Signaling  

E-Print Network [OSTI]

Accumulating evidence indicates that sustained cannabinoid agonist exposure may precipitate the onset of some neuropsychiatric disorders that are associated with dysfunction of serotonin 2A (5-HT2A ) receptor neurotransmission ...

Franklin, Jade Marie

2013-08-31T23:59:59.000Z

475

Quantitative approaches to understanding signaling regulation of 3D cell migration  

E-Print Network [OSTI]

For many cancers, dissemination of tumor cells to form metastases is not only a hallmark of the disease but an essential step to mortality. Migration and dissemination are complex, multistep processes, and study of their ...

Meyer, Aaron Samuel

2014-01-01T23:59:59.000Z

476

Salicylic Acid Regulates Arabidopsis Microbial Pattern Receptor Kinase Levels and Signaling  

Science Journals Connector (OSTI)

...Instructions for Authors ( www.plantcell.org ) is: Jean T. Greenberg ( jgreenbe@uchicago.edu ). [W] Online version contains Web-only data. [OPEN] Articles can be viewed online without a subscription. This work shows that pattern receptors are dynamically...

Chika Tateda; Zhongqin Zhang; Jay Shrestha; Joanna Jelenska; Delphine Chinchilla; Jean T. Greenberg

2014-10-14T23:59:59.000Z

477

Mu and Delta Opioid Receptors Oppositely Regulate Motor Impulsivity in the Signaled Nose Poke Task  

E-Print Network [OSTI]

of ethanol, which increased disinhibition and decreased conditioned responding in wild-type mice. In sharp no deficit in associative learning. Ethanol completely disrupted performance in these animals. Together, our

Boyer, Edmond

478

Dmp1 Regulates Osteocyte Function Via Wnt/?-Catenin Signaling Pathway  

E-Print Network [OSTI]

in vivo, failed to rescue the Dmp1-null phenotype, whereas the ^(SP)DMP1 transgene fully rescued the skeletal abnormalities of Dmp1-null mice, indicating that DMP1 functions as an ECM protein in vivo. In a separate research, we revealed an elevated ?...

Lin, Shuxian

2014-05-06T23:59:59.000Z

479

Adhesive bonding using variable frequency microwave energy  

DOE Patents [OSTI]

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

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

1998-01-01T23:59:59.000Z

480

Adhesive bonding using variable frequency microwave energy  

DOE Patents [OSTI]

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

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

1998-09-08T23:59:59.000Z

Note: This page contains sample records for the topic "frequency regulation signal" 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

Adhesive bonding using variable frequency microwave energy  

DOE Patents [OSTI]

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

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

1998-08-25T23:59:59.000Z

482

LOFAR, a new low frequency radio telescope  

E-Print Network [OSTI]

LOFAR, the Low Frequency Array, is a large radio telescope consisting of approximately 100 soccer-field sized antenna stations spread over a region of 400 km in diameter. It will operate at frequencies from ~10 to 240 MHz, with a resolution at 240 MHz of better than an arcsecond. Its superb sensitivity will allow for studies of a broad range of astrophysical topics, including reionisation, transient radio sources and cosmic rays, distant galaxies and AGNs. In this contribution a status rapport of the LOFAR project and an overview of the science case is presented.

H. J. A. Rottgering

2003-09-19T23:59:59.000Z

483

Seismic isolation systems with distinct multiple frequencies  

DOE Patents [OSTI]

A method and apparatus for isolating a building or other structure from smic vibratory motion which provides increased assurance that large horizontal motion of the structure will not occur than is provided by other isolation systems. Increased assurance that large horizontal motion will not occur is achieved by providing for change of the natural frequency of the support and structure system in response to displacement of the structure beyond a predetermined value. The natural frequency of the support and structure system may be achieved by providing for engaging and disengaging of the structure and some supporting members in response to motion of the supported structure.

Wu, Ting-shu (Downers Grove, IL); Seidensticker, Ralph W. (Wheaton, IL)

1990-01-01T23:59:59.000Z

484

Undulations from amplified low frequency surface waves  

SciTech Connect (OSTI)

We study the linear scattering of gravity waves in longitudinal inhomogeneous stationary flows. When the flow becomes supercritical, it is known that counterflow propagating shallow waves are blocked and converted into deep waves. Here we show that in the zero-frequency limit, the reflected waves are amplified in such a way that the free surface develops an undulation, i.e., a zero-frequency wave of large amplitude with nodes located at specific places. This amplification involves negative energy waves and implies that flat surfaces are unstable against incoming perturbations of arbitrary small amplitude. The relation between this instability and black hole radiation (the Hawking effect) is established.

Coutant, Antonin, E-mail: antonin.coutant@aei.mpg.de [Max Planck Institute for Gravitational Physics, Albert Einstein Institute, Am Muhlenberg 1, 14476 Golm (Germany)] [Max Planck Institute for Gravitational Physics, Albert Einstein Institute, Am Muhlenberg 1, 14476 Golm (Germany); Parentani, Renaud, E-mail: renaud.parentani@th.u-psud.fr [Laboratoire de Physique Théorique, CNRS UMR 8627, Bâtiment 210, Université Paris-Sud 11, 91405 Orsay Cedex (France)] [Laboratoire de Physique Théorique, CNRS UMR 8627, Bâtiment 210, Université Paris-Sud 11, 91405 Orsay Cedex (France)

2014-04-15T23:59:59.000Z

485

Two-frequency excitation of hydrogen atoms  

Science Journals Connector (OSTI)

When a hydrogen atom in a state with principal quantum number ni is irradiated simultaneously with light of frequency ?L, nearly that required to produce a transition to a higher state with principal quantum number nf and with microwave radiation of frequency ?, the transition is very probable when the resonance condition ?L+k?=Ef-Ei is satisfied, the emission or absorption of the net number k of microwave photons just compensating for the detuning of the light from the resonance. This process is analyzed with the use of a forward scattering method and the results are used to discuss the experiments of Bayfield et al. on the excitation of hydrogen.

P. Stehle

1982-11-01T23:59:59.000Z

486

Frequency locking in an injection-locked frequency divider Michele V. Bartuccelli  

E-Print Network [OSTI]

experimentally, and the devil's staircase structure of the lockings is measured: when the ratio of the frequency of the driving frequency. We provide explicit formulae for the width of the plateaux appearing in the devil's staircase structure of the lockings, and in particular show that the largest plateaux correspond to even

Gentile, Guido

487

Frequency locking in the injection-locked frequency divider Michele V. Bartuccelli  

E-Print Network [OSTI]

- tally, and the devil's staircase structure of the lockings is measured: when the ratio of the frequency of the driving frequency. We provide explicit formulae for the width of the plateaux appearing in the devil's staircase structure of the lockings, and in particular show that the largest plateaux correspond to even

Roma "La Sapienza", UniversitĂ  di

488

Spatial frequency spectrum of the x-ray scatter distribution in CBCT projections  

SciTech Connect (OSTI)

Purpose: X-ray scatter is a source of significant image quality loss in cone-beam computed tomography (CBCT). The use of Monte Carlo (MC) simulations separating primary and scattered photons has allowed the structure and nature of the scatter distribution in CBCT to become better elucidated. This work seeks to quantify the structure and determine a suitable basis function for the scatter distribution by examining its spectral components using Fourier analysis.Methods: The scatter distribution projection data were simulated using a CBCT MC model based on the EGSnrc code. CBCT projection data, with separated primary and scatter signal, were generated for a 30.6 cm diameter water cylinder [single angle projection with varying axis-to-detector distance (ADD) and bowtie filters] and two anthropomorphic phantoms (head and pelvis, 360 projections sampled every 1°, with and without a compensator). The Fourier transform of the resulting scatter distributions was computed and analyzed both qualitatively and quantitatively. A novel metric called the scatter frequency width (SFW) is introduced to determine the scatter distribution's frequency content. The frequency content results are used to determine a set basis functions, consisting of low-frequency sine and cosine functions, to fit and denoise the scatter distribution generated from MC simulations using a reduced number of photons and projections. The signal recovery is implemented using Fourier filtering (low-pass Butterworth filter) and interpolation. Estimates of the scatter distribution are used to correct and reconstruct simulated projections.Results: The spatial and angular frequencies are contained within a maximum frequency of 0.1 cm{sup ?1} and 7/(2?) rad{sup ?1} for the imaging scenarios examined, with these values varying depending on the object and imaging setup (e.g., ADD and compensator). These data indicate spatial and angular sampling every 5 cm and ?/7 rad (?25°) can be used to properly capture the scatter distribution, with reduced sampling possible depending on the imaging scenario. Using a low-pass Butterworth filter, tuned with the SFW values, to denoise the scatter projection data generated from MC simulations using 10{sup 6} photons resulted in an error reduction of greater than 85% for the estimating scatter in single and multiple projections. Analysis showed that the use of a compensator helped reduce the error in estimating the scatter distribution from limited photon simulations by more than 37% when compared to the case without a compensator for the head and pelvis phantoms. Reconstructions of simulated head phantom projections corrected by the filtered and interpolated scatter estimates showed improvements in overall image quality.Conclusions: The spatial frequency content of the scatter distribution in CBCT is found to be contained within the low frequency domain. The frequency content is modulated both by object and imaging parameters (ADD and compensator). The low-frequency nature of the scatter distribution allows for a limited set of sine and cosine basis functions to be used to accurately represent the scatter signal in the presence of noise and reduced data sampling decreasing MC based scatter estimation time. Compensator induced modulation of the scatter distribution reduces the frequency content and improves the fitting results.

Bootsma, G. J. [Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 2M9, Canada and Radiation Medicine Program, Princess Margaret Hospital, Toronto, Ontario M5G 2M9 (Canada)] [Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 2M9, Canada and Radiation Medicine Program, Princess Margaret Hospital, Toronto, Ontario M5G 2M9 (Canada); Verhaegen, F. [Department of Radiation Oncology (MAASTRO), GROW – School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht 6201 BN (Netherlands) [Department of Radiation Oncology (MAASTRO), GROW – School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht 6201 BN (Netherlands); Department of Oncology, Medical Physics Unit, McGill University, Montreal, Quebec H3G 1A4 (Canada); Jaffray, D. A. [Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 2M9 (Canada) [Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 2M9 (Canada); Radiation Medicine Program, Princess Margaret Hospital, Toronto, Ontario M5G 2M9 (Canada); Ontario Cancer Institute, Princess Margaret Hospital, Toronto, Ontario M5G 2M9 (Canada); Department of Radiation Oncology, University of Toronto, Toronto, Ontario M5G 2M9 (Canada)

2013-11-15T23:59:59.000Z

489

1646 IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 47, NO. 6, JUNE 1999 Spectrum Estimation of Interleaved Pulse Trains  

E-Print Network [OSTI]

of Interleaved Pulse Trains Robert J. Orsi, Student Member, IEEE, John B. Moore, Fellow, IEEE, and Robert E number of periodic time-interleaved pulse trains. For such signals, we present a novel approach for determining both the number of pulse trains present and the frequency of each pulse train. Our approach

Orsi, Robert

490

Optical control of large-signal properties of millimeter-wave and sub-millimeter-wave DDR Si IMPATTs  

Science Journals Connector (OSTI)

The authors have proposed a complete large-signal (L-S) model to investigate the optical modulation of high frequency properties of double-drift region (DDR) impact avalanche transit time (IMPATT) devices operating at different millimeter-wave and sub-millimeter-wave ... Keywords: DDR IMPATT device, Flip chip, Millimeter-wave, Optical control, Sub-millimeter-wave, Top mount

Aritra Acharyya, Suranjana Banerjee, J. P. Banerjee

2014-06-01T23:59:59.000Z

491

Real-Time Power Control of Data Centers for Providing Regulation Service  

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

Real-Time Power Control of Data Centers for Providing Regulation Service Real-Time Power Control of Data Centers for Providing Regulation Service Speaker(s): Ayse K. Coskun Date: November 19, 2013 - 12:00pm - 1:00pm Location: 90-3122 Seminar Host/Point of Contact: Girish Ghatikar Today's US power markets offer new opportunities for the energy consumers to reduce their energy costs by first promising an average consumption rate for the next hour and then by following a regulation signal broadcast by the independent system operators (ISOs), who need to match supply and demand in real time in presence of volatile and intermittent renewable energy generation. This talk proposes a management framework for the data centers to participate in the power markets. First, I will discuss how to solve the data center "regulation service (RS)" optimization problem to

492

Detuned Twin-Signal-Recycling for ultra-high precision interferometers  

E-Print Network [OSTI]

We propose a new interferometer technique for high precision phase measurements such as those in gravitational wave detection. The technique utilizes a pair of optically coupled resonators that provides identical resonance conditions for the upper as well the lower phase modulation signal sidebands. This symmetry significantly reduces the noise spectral density in a wide frequency band compared with single sideband recycling topologies of current and planned gravitational wave detectors. Furthermore the application of squeezed states of light becomes less demanding.

Andre Thuering; Roman Schnabel; Harald Lueck; Karsten Danzmann

2007-07-03T23:59:59.000Z

493

Fiber optic signal amplifier using thermoelectric power generation  

DOE Patents [OSTI]

A remote fiber optic signal amplifier for use as a repeater/amplifier, such as in transoceanic communications, powered by a Pu{sub 238} or Sr{sub 90} thermoelectric generator. The amplifier comprises a unit with connections on the receiving and sending sides of the communications system, and an erbium-doped fiber amplifier connecting each sending fiber to each receiving fiber. The thermoelectric generator, preferably a Pu{sub 238} or Sr{sub 90} thermoelectric generator delivers power to the amplifiers through a regulator. The heat exchange surfaces of the thermoelectric generator are made of materials resistant to corrosion and biological growth and are directly exposed to the outside, such as the ocean water in transoceanic communications. 2 figs.

Hart, M.M.

1995-04-18T23:59:59.000Z

494

Fiber optic signal amplifier using thermoelectric power generation  

DOE Patents [OSTI]

A remote fiber optic signal amplifier for use as a repeater/amplifier, such as in transoceanic communications, powered by a Pu.sub.238 or Sr.sub.90 thermoelectric generator. The amplifier comprises a unit with connections on the receiving and sending sides of the communications system, and an erbium-doped fiber amplifier connecting each sending fiber to each receiving fiber. The thermoelectric generator, preferably a Pu.sub.238 or Sr.sub.90 thermoelectric generator delivers power to the amplifiers through a regulator. The heat exchange surfaces of the thermoelectric generator are made of materials resistant to corrosion and biological growth and are directly exposed to the outside, such as the ocean water in transoceanic communications.

Hart, Mark M. (Aiken, SC)

1995-01-01T23:59:59.000Z

495

Science with the Frequency Agile Solar Radiotelescope  

E-Print Network [OSTI]

of Technology #12;EGU Meeting 2004 April 29 NJIT Center for Solar Terrestrial Research 2 / 30 #12;EGU MeetingScience with the Frequency Agile Solar Radiotelescope Dale E. Gary New Jersey Institute 2004 April 29 NJIT Center for Solar Terrestrial Research 3 / 30 FASR Instrument (Antennas) Three arrays

496

High-Frequency Transient Eddies and Blocking  

Science Journals Connector (OSTI)

In this paper we investigate the role of high-frequency transient eddies in the maintenance of the blocking high which occurred over Europe on 16-25 February 1979. Time-filtering is used to decompose the atmospheric large-scale flow into ...

Eero Holopainen; Carl Fortelius

1987-06-01T23:59:59.000Z

497

High-Frequency Conductivity of Degenerate Semiconductors  

Science Journals Connector (OSTI)

The problem of high-frequency conductivity of a degenerate semiconductor is investigated by a kinetic description. The finite duration of encounters is taken into account in a self-consistent fashion which properly includes collective effects. This treatment is an extension for quantum plasmas of the Dawson-Oberman method given for classical plasmas.

Amiram Ron and Narkis Tzoar

1963-09-01T23:59:59.000Z

498

Fiber type, meal frequency and colonic cytokinetics  

E-Print Network [OSTI]

The effects of dietary fiber type (cellulose, pectin or oat bran) and meal frequency (gorge or nibble) on colonic short chain fatty acids (SCFAs), in vivo colonic pH and epithelial cell proliferation were examined in male Sprague-Dawley rats...

Zhang, Jianhu

1993-01-01T23:59:59.000Z

499

Federal Regulations | Department of Energy  

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

Federal Regulations Federal Regulations Federal Regulations NOTE: Adobe Acrobat Reader may be necessary to view PDF documents listed below. Accessibility Section 508 of the Rehabilitation Act - Electronic and Information Technology Accessibility Standards Section 504 of the Rehabilitation Act - Nondiscrimination Under Federal Grants and Programs Federal Records Act Freedom of Information Act (as amended) Freedom of Information Act Updates Privacy Act of 1974 (as amended) Privacy Act Overview Cyber Security Atomic Energy Act of 1954 (PDF) Computer Fraud and Abuse Act of 1986 (PDF) Electronic Communications Privacy Act of 1986 Federal Information Security Management of 2002 ( Title III of E-Gov) Homeland Security Act of 2002 ( includes Cyber Security Act of 2002 and Critical Infrastructure Act of 2002)

500

Improving Regulation Through Incremental Adjustment  

E-Print Network [OSTI]

category or subcategory" to take account of data that EPA never considered in issuing the regulations and that render a particular discharger's situation fundamentally different from the ones EPA considered in the rulemaking. 40 C.F.R. § 125.30(b) (2003...-77 (1986). 67. 42 U.S.c. §§ 6921(a), (b)(1) (2000). 68. [d. §§ 6922-6924. 69. [d. § 6921(f)(1). 70. 40 c.F.R. § 260.22(a)(1) (2003). EPA regulations also provide a mechanism for the filing of petitions to add a hazardous waste to the list. [d. § 260...

Glicksman, Robert L.; Shapiro, Sidney A.

2004-03-01T23:59:59.000Z