Sample records for transformer ratio enhancement

  1. Observation of Enhanced Transformer Ratio in Collinear Wakefield Acceleration

    SciTech Connect (OSTI)

    Jing, C.; Kanareykin, A.; Schoessow, P. [Euclid Techlabs LLC, Solon, Ohio 44139 (United States); Power, J. G.; Conde, M.; Yusof, Z.; Gai, W. [High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois-60439 (United States)

    2007-04-06T23:59:59.000Z

    One approach to future high energy particle accelerators is based on the wakefield principle: a leading high-charge drive bunch is used to excite fields in an accelerating structure or plasma that in turn accelerates a trailing low-charge witness bunch. The transformer ratio R is defined as the ratio of the maximum energy gain of the witness bunch to the maximum energy loss of the drive bunch. In general, R<2 for this configuration. A number of techniques have been proposed to overcome the transformer ratio limitation. We report here the first experimental study of the ramped bunch train (RBT) technique in a dielectric based accelerating structure. A single drive bunch was replaced by two bunches with charge ratio of 1 ratio 2.5 and a separation of 10.5 wavelengths of the fundamental mode. An average measured transformer ratio enhancement by a factor of 1.31 over the single drive bunch case was obtained.

  2. Observation of Enhanced Transformer Ratio in Collinear Wakefield Acceleration

    SciTech Connect (OSTI)

    Jing, C.; Kanareykin, A. [Euclid Techlabs, LLC, Solon, OH-44139 (United States); Power, J.; Conde, M.; Yusof, Z.; Gai, W. [High Energy Physics Division, Argonne National Laboratory, Argonne, IL-60439 (United States)

    2006-11-27T23:59:59.000Z

    The transformer ratio R is a parameter that characterizes the efficiency of the energy transferred from the drive beam to the trailing witness beam passing through a wakefield accelerating structure (all metal or dielectric based) or a plasma chamber. Using a ramped bunch train (RBT) rather than a single drive bunch, the enhanced transformer ratio (ETR) technique is able to increase the transformer ratio R above the ordinary limit of 2 for a single bunch in a collinear wakefield accelerator. The RBT is a train of electron bunches separated by half integer multiples wavelength of the wakefield. The charge of the leading bunch is lowest and subsequent bunch charges are increased in such a way as to maximize R. In this article, an experimental study of this scheme is presented in which an RBT of 2 bunches with charge ratio of 1:2.5 and bunch length {sigma}z = 2 mm were used to enhance the transformer ratio. Measurement results and data analysis show good agreement with theoretical predictions. The ETR technique demonstrated here can be used in any collinear wakefield accelerator configuration, either structure- or plasma-based.

  3. Observation of enhanced transformer ratio in collinear Wakefield acceleration.

    SciTech Connect (OSTI)

    Power, J.; Conde, M.; Yusof, Z.; Gai, W.; Jing, C.; Kanareykin, A.; High Energy Physics; Euclid Techlabs, LLC

    2006-01-01T23:59:59.000Z

    The transformer ratio R is a parameter that characterizes the efficiency of the energy transferred from the drive beam to the trailing witness beam passing through a wakefield accelerating structure (all metal or dielectric based) or a plasma chamber. Using a ramped bunch train (RBT) rather than a single drive bunch, the enhanced transformer ratio (ETR) technique is able to increase the transformer ratio R above the ordinary limit of 2 for a single bunch in a collinear wakefield accelerator. The RBT is a train of electron bunches separated by half integer multiples wavelength of the wakefield. The charge of the leading bunch is lowest and subsequent bunch charges are increased in such a way as to maximize R. In this article, an experimental study of this scheme is presented in which an RBT of 2 bunches with charge ratio of 1:2.5 and bunch length {sigma}{sub z} = 2 mm were used to enhance the transformer ratio. Measurement results and data analysis show good agreement with theoretical predictions. The ETR technique demonstrated here can be used in any collinear wakefield accelerator configuration, either structure- or plasma-based.

  4. Recent Experiment on Wakefield Transformer Ratio Enhancement at AWA

    SciTech Connect (OSTI)

    Jing, C.; Kanareykin, A. [Euclid Techlabs, LLC, 5900 Harper Rd, Solon, OH 44139 (United States); High Energy Physics Division, Argonne National Laboratory, Argonne, IL 60439 (United States); Power, J. G.; Conde, M.; Liu, W.; Yusof, Z.; Gai, W. [High Energy Physics Division, Argonne National Laboratory, Argonne, IL 60439 (United States)

    2010-11-04T23:59:59.000Z

    One technique to enhance the transformer ratio beyond the ordinary limit of 2 in a collinear wakefield acceleration scheme is to use a ramped bunched train (RBT). The first experimental demonstration has been reported in [1]. However, due to the mismatch between the beam bunch length and frequency of the accelerating structure, the observed transformer ratio was only marginally above 2 in the earlier experiment. We recently revisited this experiment with an optimized bunch length using the laser stacking technique at Argonne Wakefield Accelerator (AWA) facility. A transformer ratio of 3.4 has been measured using two drive bunches. Attempting to use four drive bunches met with major challenges. In this article, measurement results and data analysis from these experiments are presented in detail.

  5. Tailored electron bunches with smooth current profiles for enhanced transformer ratios in beam-driven acceleration

    E-Print Network [OSTI]

    Lemery, Francois

    2015-01-01T23:59:59.000Z

    Collinear high-gradient ${\\cal O} (GV/m)$ beam-driven wakefield methods for charged-particle acceleration could be critical to the realization of compact, cost-efficient, accelerators, e.g., in support of TeV-scale lepton colliders or multiple-user free-electron laser facilities. To make these options viable, the high accelerating fields need to be complemented with large transformer ratios $>2$, a parameter characterizing the efficiency of the energy transfer between a wakefield-exciting "drive" bunch to an accelerated "witness" bunch. While several potential current distributions have been discussed, their practical realization appears challenging due to their often discontinuous nature. In this paper we propose several alternative current profiles which are smooth which also lead to enhanced transformer ratios. We especially explore a laser-shaping method capable of generating one the suggested distributions directly out of a photoinjector and discuss a linac concept that could possible drive a dielectric ...

  6. Optimization of Drive-Bunch Current Profile for Enhanced Transformer Ratio in Beam-Driven Acceleration Techniques

    SciTech Connect (OSTI)

    Lemery, F.; Mihalcea, D.; Prokop, C.R.; /Northern Illinois U.; Piot, P.; /Northern Illinois U. /Fermilab

    2012-07-08T23:59:59.000Z

    In recent years, wakefield acceleration has gained attention due to its high acceleration gradients and cost effectiveness. In beam-driven wakefield acceleration, a critical parameter to optimize is the transformer ratio. It has been shown that current shaping of electron beams allows for enhanced (> 2) transformer ratios. In this paper we present the optimization of the pulse shape of the drive bunch for dielectric-wakefield acceleration.

  7. High Transformer ratios in collinear wakefield accelerators.

    SciTech Connect (OSTI)

    Power, J. G.; Conde, M.; Yusof, Z.; Gai, W.; Jing, C.; Kanreykin, A.; Schoessow, P.; High Energy Physics; Euclid Techlabs, LLC

    2008-01-01T23:59:59.000Z

    Based on our previous experiment that successfully demonstrated wakefield transformer ratio enhancement in a 13.625 GHz dielectric-loaded collinear wakefield accelerator using the ramped bunch train technique, we present here a redesigned experimental scheme for even higher enhancement of the efficiency of this accelerator. Design of a collinear wakefield device with a transformer ratio R2, is presented. Using a ramped bunch train (RBT) rather than a single drive bunch, the enhanced transformer ratio (ETR) technique is able to increase the transformer ratio R above the ordinary limit of 2. To match the wavelength of the fundamental mode of the wakefield with the bunch length (sigmaz=2 mm) of the new Argonne wakefield accelerator (AWA) drive gun (where the experiment will be performed), a 26.625 GHz dielectric based accelerating structure is required. This transformer ratio enhancement technique based on our dielectric-loaded waveguide design will result in a compact, high efficiency accelerating structures for future wakefield accelerators.

  8. High transformer ratio drive beams for wakefield accelerator studies

    SciTech Connect (OSTI)

    England, R. J.; Ng, C.-K.; Frederico, J.; Hogan, M. J.; Litos, M.; Muggli, P.; Joshi, C.; An, W.; Andonian, G.; Mori, W.; Lu, W. [SLAC National Accelerator Laboratory, Menlo Park, CA 94025 (United States); Max Planck Institute for Physics, 80805 Munich (Germany); University of California Los Angeles, Los Angeles, CA 90095 (United States); Tsinghua University, Beijing (China)

    2012-12-21T23:59:59.000Z

    For wakefield based acceleration schemes, use of an asymmetric (or linearly ramped) drive bunch current profile has been predicted to enhance the transformer ratio and generate large accelerating wakes. We discuss plans and initial results for producing such bunches using the 20 to 23 GeV electron beam at the FACET facility at SLAC National Accelerator Laboratory and sending them through plasmas and dielectric tubes to generate transformer ratios greater than 2 (the limit for symmetric bunches). The scheme proposed utilizes the final FACET chicane compressor and transverse collimation to shape the longitudinal phase space of the beam.

  9. Increasing the transformer ratio at the Argonne wakefield accelerator.

    SciTech Connect (OSTI)

    Power, J.G.; Conde, M.; Liu, W.; Yusof, Z.; Gai, W.; Jing, C.; Kanareykin, A. (High Energy Physics); (Euclid Techlabs, LLC)

    2011-01-01T23:59:59.000Z

    The transformer ratio is defined as the ratio of the maximum energy gain of the witness bunch to the maximum energy loss experienced by the drive bunch (or a bunch within a multidrive bunch train). This plays an important role in the collinear wakefield acceleration scheme. A high transformer ratio is desirable since it leads to a higher overall efficiency under similar conditions (e.g. the same beam loading, the same structure, etc.). One technique to enhance the transformer ratio beyond the ordinary limit of 2 is to use a ramped bunch train. The first experimental demonstration observed a transformer ratio only marginally above 2 due to the mismatch between the drive microbunch length and the frequency of the accelerating structure [C. Jing, A. Kanareykin, J. Power, M. Conde, Z. Yusof, P. Schoessow, and W. Gai, Phys. Rev. Lett. 98, 144801 (2007)]. Recently, we revisited this experiment with an optimized microbunch length using a UV laser stacking technique at the Argonne Wakefield Accelerator facility and measured a transformer ratio of 3.4. Measurements and data analysis from these experiments are presented in detail.

  10. WAVELET TRANSFORMATIONS AS DIVERSITY ENHANCERS 1

    E-Print Network [OSTI]

    West, Mike

    WAVELET TRANSFORMATIONS AS DIVERSITY ENHANCERS 1 By Prem Goel Ohio State University and Duke University and Brani Vidakovic Duke University Discrete wavelet transformations have became indispensable of wavelet transformations and propose novel thresholding and wavelet selection methods. This is achieved via

  11. Transformer ratio improvement for beam based plasma accelerators

    SciTech Connect (OSTI)

    O'Shea, Brendan; Rosenzweig, James; Barber, Samuel; Fukasawa, Atsushi; Williams, Oliver; Muggli, Patric; Yakimenko, Vitaly; Kusche, Karl [University of California, Los Angeles, Department of Physics and Astronomy, Los Angeles, CA 90095 (United States); University of Southern California, Department of Electrical Engineering, Los Angeles, CA 90089 U.S.A. and Max-Planck-Institut fuer Physik, Foehringer Ring 6, 80805 Muenchen (Germany); Accelerator Test Facility, Brookhaven National Lab, Upton, NY, 11973 (United States)

    2012-12-21T23:59:59.000Z

    Increasing the transformer ratio of wakefield accelerating systems improves the viability of present novel accelerating schemes. The use of asymmetric bunches to improve the transformer ratio of beam based plasma systems has been proposed for some time[1, 2] but suffered from lack appropriate beam creation systems. Recently these impediments have been overcome [3, 4] and the ability now exists to create bunches with current profiles shaped to overcome the symmetric beam limit of R {<=} 2. We present here work towards experiments designed to measure the transformer ratio of such beams, including theoretical models and simulations using VORPAL (a 3D capable PIC code) [5]. Specifically we discuss projects to be carried out in the quasi-nonlinear regime [6] at the UCLA Neptune Laboratory and the Accelerator Test Facility at Brookhaven National Lab.

  12. Improved Signal-to-Noise Ratio Estimation for Speech Enhancement

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Improved Signal-to-Noise Ratio Estimation for Speech Enhancement Cyril Plapous, Member, IEEE speech enhancement in noisy environments. State-of- the-art short-time noise reduction techniques reduction techniques, includ- ing TSNR, introduce harmonic distortion in enhanced speech because

  13. Peak-to-average power ratio reduction in OFDM based on transformation of partial

    E-Print Network [OSTI]

    Peak-to-average power ratio reduction in OFDM based on transformation of partial transmit sequences number, but T-PTS is less complex. Introduction: To avoid the occurrence of large peak power of signals G. Lu, P. Wu and C. Carlemalm-Logothetis A novel scheme (transformation of partial transmit

  14. HIGH-GRADIENT, HIGH-TRANSFORMER-RATIO, DIELECTRIC WAKE FIELD ACCELERATOR

    SciTech Connect (OSTI)

    Jay L. Hirshfield

    2012-04-12T23:59:59.000Z

    The Phase I work reported here responds to DoE'ss stated need "...to develop improved accelerator designs that can provide very high gradient (>200 MV/m for electrons...) acceleration of intense bunches of particles." Omega-P'�s approach to this goal is through use of a ramped train of annular electron bunches to drive a coaxial dielectric wakefield accelerator (CDWA) structure. This approach is a direct extension of the CDWA concept from acceleration in wake fields caused by a single drive bunch, to the more efficient acceleration that we predict can be realized from a tailored (or ramped) train of several drive bunches. This is possible because of a much higher transformer ratio for the latter. The CDWA structure itself has a number of unique features, including: a high accelerating gradient G, potentially with G > 1 GeV/m; continuous energy coupling from drive to test bunches without transfer structures; inherent transverse focusing forces for particles in the accelerated bunch; highly stable motion of high charge annular drive bunches; acceptable alignment tolerances for a multi-section system. What is new in the present approach is that the coaxial dielectric structure is now to be energized by-not one-�but by a short train of ramped annular-shaped drive bunches moving in the outer coaxial channel of the structure. We have shown that this allows acceleration of an electron bunch traveling along the axis in the inner channel with a markedly higher transformer ratio T than for a single drive bunch. As described in this report, the structure will be a GHz-scale prototype with cm-scale transverse dimensions that is expected to confirm principles that can be applied to the design of a future THz-scale high gradient (> 500 MV/m) accelerator with mm-scale transverse dimensions. We show here a new means to significantly increase the transformer ratio T of the device, and thereby to significantly improve its suitability as a flexible and effective component in a future high energy, high gradient accelerator facility. We predict that the T of a high gradient CDWA can be increased by a substantial factor; this enhancement is dramatically greater than what has been demonstrated heretofore. This large enhancement in T that we predict arises from using a train of three or four drive bunches in which the spacing of the bunches and their respective charges are selected according to a simple principle that requires each bunch lose energy to the wakefields at the same rate, so as not to sacrifice drive beam efficiency�¢����as would be the case if one bunch exhausted its available energy while others had not. It is anticipated that results from the study proposed here can have a direct impact on design of the dielectric accelerator in a TeV-scale collider concept, and in the accelerator for an x-ray FEL.

  15. Scaling of the Longitudinal Electric Field and Transformer Ratio in a Nonlinear Plasma Wakefield Accelerator

    SciTech Connect (OSTI)

    Blumenfeld, I.; /SLAC; Clayton, C.E.; /UCLA; Decker, F.J.; Hogan, M.J.; /SLAC; Huang, C.; /UCLA; Ischebeck, R.; Iverson, R.H.; /SLAC; Joshi, C.; /UCLA; Katsouleas, T.; /Southern California U.; Kirby, N.; /SLAC; Lu, W.; Marsh, K.A.; Mori, W.B.; /UCLA; Muggli, P.; Oz, E.; /Southern California U.; Siemann, R.H.; Walz, D.R.; /SLAC; Zhou, M.; /UCLA

    2012-06-12T23:59:59.000Z

    The scaling of the two important figures of merit, the transformer ratio T and the longitudinal electric field E{sub z}, with the peak drive-bunch current I{sub p}, in a nonlinear plasma wakefield accelerator is presented for the first time. The longitudinal field scales as I{sub P}{sup 0.623{+-}0.007}, in good agreement with nonlinear wakefield theory ({approx}I{sub P}{sup 0.5}), while the unloaded transformer ratio is shown to be greater than unity and scales weakly with the bunch current. The effect of bunch head erosion on both parameters is also discussed.

  16. Application of a Fourier transform based filtering technique to improve signal-to-noise ratio in modulation spectroscopy experiments

    E-Print Network [OSTI]

    Ghosh, Sandip

    Application of a Fourier transform based filtering technique to improve signal-to-noise ratio of a fast Fourier transform FFT based simplified filtering procedure to improve S/N ratio, thereby enabling) is the Fourier transform of the above data. The frequency scale has been normalized with respect to the Nyquist

  17. ENHANCING THE FREQUENCY OF SOMATIC EMBRYOGENESIS FOLLOWING AGROBACTERIUM-MEDIATED TRANSFORMATION OF

    E-Print Network [OSTI]

    Korban, Schuyler S.

    ENHANCING THE FREQUENCY OF SOMATIC EMBRYOGENESIS FOLLOWING AGROBACTERIUM-MEDIATED TRANSFORMATION embryogenic explants along with the location of embryogenesis- and transformation-competent cells embryogenesis on immature cotyledons following Agrobacterium tumefaciens-mediated transformation and selection

  18. Two Channel Dielectric-Lined Rectangular High Transformer Ratio Accelerator Structure Experiment

    SciTech Connect (OSTI)

    Shchelkunov, S. V.; LaPointe, M. A. [Beam Physics Laboratory, Yale University, 272 Whitney Avenue, New Haven, CT 06511 (United States); Hirshfield, J. L. [Beam Physics Laboratory, Yale University, 272 Whitney Avenue, New Haven, CT 06511 (United States); Omega-P, Inc., 258 Bradley St., New Haven, CT 06510 (United States); Marshall, T. C. [Columbia University, New York, NY 10027 (United States); Omega-P, Inc., 258 Bradley St., New Haven, CT 06510 (United States); Sotnikov, G. [NSC Kharkov Institute of Physics and Technology, Kharkov (Ukraine); Omega-P, Inc., 258 Bradley St., New Haven, CT 06510 (United States); Gai, Wei; Conde, M.; Power, J.; Mihalcea, D. [Argonne National Laboratory, Argonne, IL 60439 (United States)

    2010-11-04T23:59:59.000Z

    Current status of a two-channel cm-scale rectangular dielectric lined wakefield accelerator structure is described. This structure is installed at the Argonne Wakefield Accelerator facility (AWA), and is presently being evaluated. The device has a transformer ratio of {approx}12.5:1. When driven by a {approx}50 nC single drive bunch it is expected to obtain {approx}6 MV/m acceleration gradient. Related issues are discussed.

  19. Resonantly enhanced kicks from equatorial small mass-ratio inspirals

    E-Print Network [OSTI]

    Maarten van de Meent

    2014-08-19T23:59:59.000Z

    We calculate the kick generated by an eccentric black hole binary inspiral as it evolves through a resonant orbital configuration where the precession of the system temporarily halts. As a result, the effects of the asymmetric emission of gravitational waves build up coherently over a large number of orbits. Our results are calculate using black hole perturbation theory in the limit where the ratio of the masses of the orbiting objects $\\epsilon=m/M$ is small. The resulting kick velocity scales as $\\epsilon^{3/2}$, much faster than the $\\epsilon^2$ scaling of the kick generated by the final merger. For the most extreme case of a very eccentric ($e\\sim 1$) inspiral around a maximally spinning black hole, we find kicks close to $30,000\\;\\epsilon^{3/2}$~km/s, enough to dislodge a black hole from its host cluster or even galaxy. In reality, such extreme inspirals should be very rare. Nonetheless, the astrophysical impact of kicks in less extreme inspirals could be astrophysically significant.

  20. Hyperfine-Enhanced Gyromagnetic Ratio of a Nuclear Spin in Diamond

    E-Print Network [OSTI]

    S. Sangtawesin; J. R. Petta

    2015-03-25T23:59:59.000Z

    Nuclear spins in the solid state environment of diamond are highly coherent, but difficult to rapidly control due to the small nuclear gyromagnetic ratio. Here we demonstrate a more than 50-fold enhancement of the effective nuclear gyromagnetic ratio by coupling the nuclear spin to an electronic spin of a nitrogen-vacancy (NV) center in diamond. The enhancement allows for faster nuclear spin rotations and is in good agreement with second-order perturbation theory. The method may be applied to other systems with similar electron-nuclear spin interactions, such as phosphorous donors in silicon, opening up the possibility of fast and direct nuclear spin control in coupled spin systems.

  1. Practical method and device for enhancing pulse contrast ratio for lasers and electron accelerators

    DOE Patents [OSTI]

    Zhang, Shukui; Wilson, Guy

    2014-09-23T23:59:59.000Z

    An apparatus and method for enhancing pulse contrast ratios for drive lasers and electron accelerators. The invention comprises a mechanical dual-shutter system wherein the shutters are placed sequentially in series in a laser beam path. Each shutter of the dual shutter system has an individually operated trigger for opening and closing the shutter. As the triggers are operated individually, the delay between opening and closing first shutter and opening and closing the second shutter is variable providing for variable differential time windows and enhancement of pulse contrast ratio.

  2. A wavelet filter enhancement scheme with a fast integral B-wavelet transform and

    E-Print Network [OSTI]

    Nelson, James

    A wavelet filter enhancement scheme with a fast integral B-wavelet transform and pyramidal multi-B-wavelet OAL Abstract A construction paradigm is proposed to refine a class of wavelet bases such that the filter characteristics are enhanced. In particular, it is shown that the entire Mth order B-wavelet

  3. Quantum efficiency enhancement in nanocrystals using nonradiative energy transfer with optimized donor-acceptor ratio for hybrid LEDs

    E-Print Network [OSTI]

    Demir, Hilmi Volkan

    Quantum efficiency enhancement in nanocrystals using nonradiative energy transfer with optimized donor-acceptor ratio for hybrid LEDs Sedat Nizamoglu, Onur Akin, and Hilmi Volkan Demira Department emitting diodes LEDs . For this purpose, we investigate energy gradient mixture of nanocrystal solids

  4. Polarization ratio enhancement of a-plane GaN light emitting diodes by asymmetric two-dimensional photonic crystals

    SciTech Connect (OSTI)

    Chou, Yen; Li, Hsiang-Wei; Yin, Yu-Feng; Wang, Yu-Ting; Lin, Yen-Chen; Wu, Yuh-Renn; Huang, Jian Jang, E-mail: jjhuang@ntu.edu.tw [Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan (China); Lin, Da-Wei; Kuo, Hao-Chung [Department of Photonics and Electro-Optical Engineering, National Chiao-Tung University, Hsinchu, Taiwan (China)

    2014-05-21T23:59:59.000Z

    Fabricating photonic crystals (PhCs) on GaN based non-polar light emitting diodes (LEDs) is an effective way to increase light extraction and meanwhile to preserve or improve polarization ratio. In this work, a-plane GaN LEDs with two-dimensional PhCs were demonstrated. With the E // m polarized modes (which mean the optical polarization with the electric field parallel to m-axis) as the target of diffraction, we matched E//m modes to the photonic bands and aligned E//c modes to fall within the photonic band gap. The results show stronger E//m but weaker E//c mode diffractions on both c- and m-axes. At the vertical direction, the polarization ratio is enhanced from 45.8% for the planar device to 52.3% for the LEDs with PhCs.

  5. 55Fe effect on enhancing ferritic steel He/dpa ratio in fission reactor irradiations to simulate fusion conditions

    SciTech Connect (OSTI)

    Liu, Haibo; Abdou, Mohamed A.; Greenwood, Lawrence R.

    2013-11-01T23:59:59.000Z

    How to increase the ferritic steel He(appm)/dpa ratio in a fission reactor neutron spectrum is an important question for fusion reactor material testing. An early experiment showed that the accelerated He(appm)/dpa ratio of about 2.3 was achieved for 96% enriched 54Fe in iron with 458.2 effective full power days (EFPD) irradiation in the High Flux Isotope Reactor (HFIR), ORNL. Greenwood suggested that the transmutation produced 55Fe has a thermal neutron helium production cross section which may have an effect on this result. In the current work, the ferritic steel He(appm)/dpa ratio is studied in the neutron spectrum of HFIR with 55Fe thermal neutron helium production taken into account. The available ENDF-b format 55Fe incident neutron cross section file from TENDL, Netherlands, is first input into the calculation model. A benchmark calculation for the same sample as used in the aforementioned experiment was used to adjust and evaluate the TENDL 55Fe (n, a) cross section values. The analysis shows a decrease of a factor of 6700 for the TENDL 55Fe (n, a) cross section in the intermediate and low energy regions is required in order to fit the experimental results. The best fit to the cross section value at thermal neutron energy is about 27 mb. With the adjusted 55Fe (n, a) cross sections, calculation show that the 54Fe and 55Fe isotopes can be enriched by the isotopic tailoring technique in a ferritic steel sample irradiated in HFIR to significantly enhance the helium production rate. The results show that a 70% enriched 54Fe and 30% enriched 55Fe ferritic steel sample would produce a He(appm)/dpa ratio of about 13 initially in the HFIR peripheral target position (PTP). After one year irradiation, the ratio decreases to about 10. This new calculation can be used to guide future isotopic tailoring experiments designed to increase the He(appm)/dpa ratio in fission reactors. A benchmark experiment is suggested to be performed to evaluate the 55Fe (n, a) cross section at thermal energy.

  6. Measurement of the Europium Isotope Ratio for the Extremely Metal-Poor, r-Process-Enhanced Star CS31082-001

    E-Print Network [OSTI]

    W. Aoki; S. Honda; T. C. Beers; C. Sneden

    2002-11-28T23:59:59.000Z

    We report the first measurement of the isotope fraction of europium (151Eu and 153Eu) for the extremely metal-poor, r-process-enhanced star CS31082-001, based on high-resolution spectra obtained with the Subaru Telescope High Dispersion Spectrograph. We have also obtained new measurements of this ratio for two similar stars with previous europium isotope measurements, CS22892-052 and HD115444. The measurements were made using observations of the Eu lines in these spectra that are most significantly affected by isotope shifts and hyperfine splitting. The fractions of 151Eu derived for CS31082-001, CS22892-052, and HD115444 are 0.44, 0.51, and 0.46, respectively, with uncertainties of about +/-0.1. CS31082-001, the first star with a meaningful measurement of U outside of the solar system, is known to exhibit peculiar abundance ratios between the actinide and rare-earth elements (e.g., Th/Eu), ratios that are significantly different from those for other stars with large excesses of r-process elements, such as our two comparison objects. Nevertheless, our analysis indicates that the Eu isotope ratio of CS31082-001 agrees, within the errors, with those of other r-process-enhanced objects, and with that of solar-system material.

  7. Plasmon-enhanced polymer photovoltaic cells based on large aspect ratio gold nanorods and the related working mechanism

    E-Print Network [OSTI]

    Xiong, Qihua

    organic bulk heterojunction solar cells: Plasmon enhanced performance using Au nanoparticles Appl. Phys arrays AIP Conf. Proc. 1447, 361 (2012); 10.1063/1.4710029 Spectral conversion for solar cell efficiency are attracting many attentions due to their potential for low-cost, high-throughput processing. However

  8. Electron yield XAFS study of evaporated Co/Pd multilayers with various thickness ratios of Co to Pd sublayers: Simulations of the Co K-edge XAFS and fourier transforms

    SciTech Connect (OSTI)

    Choi, M. [Catholic Univ. Medical Coll., Seoul (Korea, Republic of). Dept. of Physics; Joo, J.H. [Korea Inst. of Science and Technology, Seoul (Korea, Republic of). Materials Design Lab.; Kim, S.K.; Kang, J.S.; Lee, Y.P. [Research Inst. of Industrial Science Technology, Pohang (Korea, Republic of); Shin, S.C. [Korea Advanced Inst. of Science and Technology, Seoul (Korea, Republic of); Heald, S.M. [Brookhaven National Lab., Upton, NY (United States)

    1992-11-01T23:59:59.000Z

    Electron-yield XAFS measurements using the NSLS were made on e-beam evaporated Co/Pd multilayers with various sublayer thicknesses and different thickness ratios of Co to Pd sublayers. The Co K-edge and the Pd K-edge XAFS data were obtained for the Co/Pd multilayers with sublayer thicknesses of 3{Angstrom}/ 4{Angstrom}, 15{Angstrom}/4{Angstrom}, 3{Angstrom}/15{Angstrom}, 2.1{Angstrom}/13.5{Angstrom}, and 2.2{Angstrom}/4.5{Angstrom}. Fourier transforms of Co K XAFS for most samples show a splitting of major peak, and the magnitude ratio of these split peaks varies systematically with the thickness ratio of the Pd sublayer to the Co sublayer, whereas the Fourier transforms of the Pd K XAFS for the same samples do not show a splitting of peaks. As a preliminary analysis, the Co K XAFS and the split peaks in the Fourier transform for the Co/Pd(3{Angstrom}/4{Angstrom}) case were simulated by using the FEFF calculations, and the Co K XAFS and the major peak in the fourier transform for the Co/Pd(15{Angstrom}/4{Angstrom}) case were also simulated consistently.

  9. Electron yield XAFS study of evaporated Co/Pd multilayers with various thickness ratios of Co to Pd sublayers: Simulations of the Co K-edge XAFS and fourier transforms

    SciTech Connect (OSTI)

    Choi, M. (Catholic Univ. Medical Coll., Seoul (Korea, Republic of). Dept. of Physics); Joo, J.H. (Korea Inst. of Science and Technology, Seoul (Korea, Republic of). Materials Design Lab.); Kim, S.K.; Kang, J.S.; Lee, Y.P. (Research Inst. of Industrial Science Technology, Pohang (Korea, Republic of)); Shin, S.C. (Korea Advanced Inst. of Science and Technology, Seoul (Korea, Republic of)); Heald, S.M.

    1992-01-01T23:59:59.000Z

    Electron-yield XAFS measurements using the NSLS were made on e-beam evaporated Co/Pd multilayers with various sublayer thicknesses and different thickness ratios of Co to Pd sublayers. The Co K-edge and the Pd K-edge XAFS data were obtained for the Co/Pd multilayers with sublayer thicknesses of 3[Angstrom]/ 4[Angstrom], 15[Angstrom]/4[Angstrom], 3[Angstrom]/15[Angstrom], 2.1[Angstrom]/13.5[Angstrom], and 2.2[Angstrom]/4.5[Angstrom]. Fourier transforms of Co K XAFS for most samples show a splitting of major peak, and the magnitude ratio of these split peaks varies systematically with the thickness ratio of the Pd sublayer to the Co sublayer, whereas the Fourier transforms of the Pd K XAFS for the same samples do not show a splitting of peaks. As a preliminary analysis, the Co K XAFS and the split peaks in the Fourier transform for the Co/Pd(3[Angstrom]/4[Angstrom]) case were simulated by using the FEFF calculations, and the Co K XAFS and the major peak in the fourier transform for the Co/Pd(15[Angstrom]/4[Angstrom]) case were also simulated consistently.

  10. Europium Isotope Ratios in s-Process-Element-Enhanced, Metal-Poor Stars: A New Probe of the 151Sm Branching

    E-Print Network [OSTI]

    Wako Aoki; Sean G. Ryan; Nobuyuki Iwamoto; Timothy C. Beers; John E. Norris; Hiroyasu Ando; Toshitaka Kajino; Grant J. Mathews; Masayuki Y. Fujimoto

    2003-06-26T23:59:59.000Z

    We report on the first measurement of the Eu isotope fractions (151Eu and 153Eu) in s-process-element-enhanced, metal-poor stars. We use these ratios to investigate the 151Sm branching of s-process nucleosynthesis. The measurement was made by detailed study of Eu II lines that are significantly affected by hyperfine splitting and isotope shifts in spectra of the carbon-rich, very metal-poor stars LP625-44 and CS31062-050, observed with the Subaru Telescope High Dispersion Spectrograph. The 151Eu fractions [fr(151Eu) = 151Eu/(151Eu+153Eu)] derived for LP625-44 and CS31062-050 are 0.60 and 0.55, respectively, with uncertainties of about +/- 0.05. These values are higher than found in solar-system material, but agree well with the predictions of recent s-process models. We derive new constraints on the temperature and neutron density during the s-process based on calculations of pulsed s-process models for the 151Eu fraction.

  11. ENHANCING NETWORK SECURITY USING 'LEARNING-FROM-SIGNALS' AND FRACTIONAL FOURIER TRANSFORM BASED RF-DNA FINGERPRINTS

    SciTech Connect (OSTI)

    Buckner, Mark A [ORNL; Bobrek, Miljko [ORNL; Farquhar, Ethan [ORNL; Harmer, Paul K [Air Force Institute of Technology; Temple, Michael A [Air Force Institute of Technology

    2011-01-01T23:59:59.000Z

    Wireless Access Points (WAP) remain one of the top 10 network security threats. This research is part of an effort to develop a physical (PHY) layer aware Radio Frequency (RF) air monitoring system with multi-factor authentication to provide a first-line of defense for network security--stopping attackers before they can gain access to critical infrastructure networks through vulnerable WAPs. This paper presents early results on the identification of OFDM-based 802.11a WiFi devices using RF Distinct Native Attribute (RF-DNA) fingerprints produced by the Fractional Fourier Transform (FRFT). These fingerprints are input to a "Learning from Signals" (LFS) classifier which uses hybrid Differential Evolution/Conjugate Gradient (DECG) optimization to determine the optimal features for a low-rank model to be used for future predictions. Results are presented for devices under the most challenging conditions of intra-manufacturer classification, i.e., same-manufacturer, same-model, differing only in serial number. The results of Fractional Fourier Domain (FRFD) RF-DNA fingerprints demonstrate significant improvement over results based on Time Domain (TD), Spectral Domain (SD) and even Wavelet Domain (WD) fingerprints.

  12. Enhanced method to reconstruct mode shapes of continuous scanning measurements using the Hilbert Huang transform and the modal analysis method

    SciTech Connect (OSTI)

    Lee, Jongsuh; Hussain, Syed Hassaan; Wang, Semyung, E-mail: smwang@gist.ac.kr; Park, Kyihwan [School of Mechatronics, Gwangju Institute of Science and Technology, Gwangju 500-712 (Korea, Republic of)

    2014-09-15T23:59:59.000Z

    Generally, it is time consuming to experimentally identify the operating deflection shape or mode shape of a structure. To overcome this problem, the Hilbert Huang transform (HHT) technique has been recently proposed. This technique is used to extract the mode shape from measurements that continuously measure the vibration of a region of interest within a structure using a non-contact laser sensor. In previous research regarding the HHT, two technical processes were needed to obtain the mode shape for each mode. The purpose of this study is to improve and complement our previous research, and for this purpose, a modal analysis approach is adapted without using the two technical processes to obtain an accurate un-damped impulse response of each mode for continuous scanning measurements. In addition, frequency response functions for each type of beam are derived, making it possible to make continuously scanned measurements along a straight profile. In this paper, the technical limitations and drawbacks of the damping compensation technique used in previous research are identified. In addition, the separation of resonant frequency (the Doppler effect) that occurs in continuous scanning measurements and the separation of damping phenomenon are also observed. The proposed method is quantitatively verified by comparing it with the results obtained from a conventional approach to estimate the mode shape with an impulse response.

  13. Series Transmission Line Transformer

    DOE Patents [OSTI]

    Buckles, Robert A. (Livermore, CA); Booth, Rex (Livermore, CA); Yen, Boris T. (El Cerrito, CA)

    2004-06-29T23:59:59.000Z

    A series transmission line transformer is set forth which includes two or more of impedance matched sets of at least two transmissions lines such as shielded cables, connected in parallel at one end ans series at the other in a cascading fashion. The cables are wound about a magnetic core. The series transmission line transformer (STLT) which can provide for higher impedance ratios and bandwidths, which is scalable, and which is of simpler design and construction.

  14. Market Transformation

    SciTech Connect (OSTI)

    Not Available

    2008-09-01T23:59:59.000Z

    Summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its market transformation subprogram.

  15. Transformation Composition

    E-Print Network [OSTI]

    Drewes, Frank

    Proc. AGTIVE'99, to appear in LNCS Graph Transformation Modules and their Composition ? Frank,knirsch,kreo,kuskeg@informatik.uni-bremen.de Abstract. In this paper, we investigate the notion of transformation modules as a structuring principle. Based on the notion of transformation units, a concept that allows to specify binary relations on graphs

  16. transformations: representations

    E-Print Network [OSTI]

    Nguyen, Dat H.

    Overview 1. Number transformations: from one base to another 2. Integer representations 3. Real rate, caches... #12; ECS 50, Discussion on 4/25 2 Integer Transformation: From Decimal to Binary Let, Discussion on 4/25 3 Integer Transformation: From Binary to Decimal Compute the weight of each digit position

  17. Market Transformation

    Fuel Cell Technologies Publication and Product Library (EERE)

    This Fuel Cell Technologies Program fact sheet outlines current status and challenges in the market transformation of hydrogen and fuel cell technologies.

  18. High Compression Ratio Turbo Gasoline Engine Operation Using...

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

    Compression Ratio Turbo Gasoline Engine Operation Using Alcohol Enhancement PI: John B. Heywood Sloan Automotive Laboratory Massachusetts Institute of Technology June 19, 2014...

  19. SPATIAL TRANSFORMATIONS 1 Running head: Spatial transformations

    E-Print Network [OSTI]

    Zacks, Jeffrey M.

    SPATIAL TRANSFORMATIONS 1 Running head: Spatial transformations Multiple Systems for Spatial Imagery: Transformations of Objects and Bodies Jeffrey M. Zacks* and Barbara Tversky * Washington COGNITION & COMPUTATION #12;SPATIAL TRANSFORMATIONS 2 Abstract Problem-solving often requires imagining

  20. Fourier Transform Pairs The Fourier transform transforms a function of

    E-Print Network [OSTI]

    Masci, Frank

    Fourier Transform Pairs The Fourier transform transforms a function of time, f(t), into a function of frequency, F(s): F {f(t)}(s) = F(s) = Z - f(t)e- j2st dt. The inverse Fourier transform transforms a func. The inverse Fourier transform of the Fourier trans- form is the identity transform: f(t) = Z - Z - f()e- j2s

  1. The Laplace Transform 1 Laplace transform and inverse transform

    E-Print Network [OSTI]

    Yengulalp, Lynne

    The Laplace Transform Name: 1 Laplace transform and inverse transform Definition. Let f(t) be a function defined for t 0. Then the integral L {f(t)} = 0 e-st f(t)dt is said to be the Laplace transform of f provided the integral converges. Fill in the following Laplace transforms. L {tn } = L {eat } = L

  2. Transformers Transformer device used to raise (for

    E-Print Network [OSTI]

    Bertulani, Carlos A. - Department of Physics and Astronomy, Texas A&M University

    Transformers Transformer ­ device used to raise (for transmission) and lower (for use) the ac with different #s of turns #12;Transformers Alternating primary current induces alternating magnetic flux in iron dt d NV B PP -= dt d NV B SS -= S S P P N V N V = #12;Transformers Transformation of voltage

  3. Shrinking cloaks in expanding spacetimes: the role of coordinates and the meaning of transformations in Transformation Optics

    E-Print Network [OSTI]

    Robert T. Thompson; Mohsen Fathi

    2015-06-29T23:59:59.000Z

    The fully covariant formulation of transformation optics is used to find the configuration of a cloaking device operating in an expanding universe modelled by a Friedmann-Lema\\^itre-Robertson-Walker spacetime. This spacetime cloak is used as a platform for probing the covariant formulation of transformation optics, thereby rigorously enhancing the conceptual understanding of the theory. By studying the problem in both comoving and physical coordinates we explicitly demonstrate the preservation of general covariance of electrodynamics under the transformation optics procedure. This platform also enables a detailed study of the various transformations that arise in transformation optics. We define a corporeal transformation as the "transformation" of transformation optics, and distinguish it from coordinate and frame transformations. We find that corporeal transformations considered in the literature have generally been restricted to a subset of all possible corporeal transformations, providing a potential mechanism for increased functionality of transformation optics.

  4. Testability Transformation --Program Transformation to Improve Testability

    E-Print Network [OSTI]

    Binkley, David W.

    Testability Transformation -- Program Transformation to Improve Testability Mark Harman1 , Andr, 26 Richmond Street, Glasgow G1 1XH, UK. Corresponding Author. Abstract. Testability transformation. The goal is to improve the testing process by transforming a program to one that is more amenable

  5. Testability Transformation: Program Transformation to Improve Testability

    E-Print Network [OSTI]

    Singer, Jeremy

    Testability Transformation: Program Transformation to Improve Testability An Overview of Recent Author. Abstract. Testability transformation is a new form of program transfor- mation in which the goal to some chosen test adequacy criterion. The goal is to improve the testing process by transforming

  6. Abundance ratios in hierarchical galaxy formation

    E-Print Network [OSTI]

    D. Thomas

    1999-01-18T23:59:59.000Z

    The chemical enrichment and stellar abundance ratios of galaxies which form in a hierarchical clustering scheme are calculated. For this purpose I adopt the star formation histories (SFH) as they are delivered by semi-analytic models in Kauffmann (1996}. It turns out that the average SFH of cluster ellipticals does not yield globally alpha-enhanced stellar populations. The star burst that occurs when the elliptical forms in the major merger plays therefore a crucial role in producing alpha-enhancement. Only under the assumption that the IMF is significantly flattened with respect to the Salpeter value during the burst, a Mg/Fe overabundant population can be obtained. In particular for the interpretation of radial gradients in metallicity and alpha-enhancement, the mixing of global and burst populations are of great importance. The model predicts bright field galaxies to be less alpha-enhanced than their counterparts in clusters.

  7. The decommodified security ratio

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    are currently experiencing: changing patterns of work, the phenom- enon she calls the "breakdown in the wage furthered by the work of the International Labour Office. In particular, the programme of researchThe decommodified security ratio: A tool for assessing European social protection systems Georges

  8. Analyzing Signals Fourier transform

    E-Print Network [OSTI]

    Sweldens, Wim

    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

  9. Multi-ratio transmission

    SciTech Connect (OSTI)

    Polak, J.C.

    1987-07-14T23:59:59.000Z

    A preselected multi-ratio power transmission is described comprising: input means for transmitting drive forces; output means; first, second and third friction clutch means each selectively engageable with the input means for accepting drive forces. First input gear means drivingly connects with the first friction clutch means; second input gear means drivingly connects with the second friction clutch means; third input gear means drivingly connects with the third clutch means; first output gear means drivingly connects with the first input gear means; second output gear means drivingly connects with the first and second input gear means; third output means drivingly connects between the third input gear means and the output means; and one double-acting synchronizer clutch for selectively engaging the first output gear means with the output means and alternately the second output gear means with the output means. The first friction clutch means and the one double-acting synchronizer clutch cooperates during engagement to establish two forward drive ratios between the input and output means. The second friction clutch means and the one double-acting synchronizer clutch cooperates during engagement to establish two other forward drive ratios between the input and output means. The third friction clutch means is engageable to provide another forward drive ratio between the input means and the output means; and the one double-acting synchronizer clutch is relieved of transmitting drive forces during the engagement of the third friction clutch means and being manipulable for alternate connection with either the first output gear or the second output gear while the third friction clutch means is engaged.

  10. GIS TRANSFORMATIONS Conference Presentation

    E-Print Network [OSTI]

    Tobler, Waldo

    GIS TRANSFORMATIONS Conference Presentation Waldo Tobler Geography Department University, line, area, or field phenomena, then the sixteen common classes of transformation are: point -> point (scalar, vector, tensor) data, to obtain eighty distinct possible classes of transformation. The common

  11. ARM - Measurement - Isotope ratio

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadap Documentation TDMADAP : XDC documentationBarrow,ice particleSizegovMeasurementsIsotope ratio

  12. AUDITORY CODING BASED SPEECH ENHANCEMENT Yao Ren, Michael T. Johnson

    E-Print Network [OSTI]

    Johnson, Michael T.

    AUDITORY CODING BASED SPEECH ENHANCEMENT Yao Ren, Michael T. Johnson Speech and Signal Processing This paper demonstrates a speech enhancement system based on an efficient auditory coding approach, coding-stationary characteristics of speech signals than the Fourier transform or wavelet transform. Enhancement is accomplished

  13. MARQUETTE UNIVERSITY Auditory Model-based Bionic Wavelet Transform

    E-Print Network [OSTI]

    Johnson, Michael T.

    MARQUETTE UNIVERSITY Auditory Model-based Bionic Wavelet Transform For Speech Enhancement A THESIS. Therefore applying this method to speech enhancement may lead to a promising future in this field. Spectral subtraction methods have been widely used in speech enhancement, but all are notorious for unexpected music

  14. transformation languages Introduction

    E-Print Network [OSTI]

    Nierstrasz, Oscar

    transformation languages Introduction Transformation languages are widely used for to process can I change / transform the design of a certain task without changing it's logic The common/and hierarchical or/and abstract set of information. It can even be a stream of data. · The transformation engine

  15. Glowing Bacteria: Transformation Efficiency

    E-Print Network [OSTI]

    Rose, Michael R.

    1 Glowing Bacteria: Transformation Efficiency Purpose: To determine how well your E. coli cells took up and expressed GFP after transformation. Background: Transformation efficiency is a quantitative)______ (Fraction of DNA spread on plate) = ______ µg plasmid DNA spread on plate #12;2 5. Transformation efficiency

  16. Learning Transformations From Video

    E-Print Network [OSTI]

    Wang, Ching Ming

    2010-01-01T23:59:59.000Z

    on Natural Video . . . . . . . . . . . . . . . . .3 Learning Continuous Transformation from VideoProposed Video Coder

  17. Perfect NOT transformation and conjugate transformation

    E-Print Network [OSTI]

    Fengli Yan; Ting Gao; Zhichao Yan

    2012-03-15T23:59:59.000Z

    The perfect NOT transformation, probabilistic perfect NOT transformation and conjugate transformation are studied. Perfect NOT transformation criteria on a quantum state set $S$ of a qubit are obtained. Two necessary and sufficient conditions for realizing a perfect NOT transformation on $S$ are derived. When these conditions are not satisfied we discuss a probabilistic perfect NOT transformation (gate). We construct a probabilistic perfect NOT machine (gate) by a general unitary-reduction operation. With a postselection of the measurement outcomes, the probabilistic NOT gate yields perfectly complements of the input states. We prove that one can realize probabilistically the NOT gate of the input states secretly chosen from a certain set $S=\\{|\\Psi_1>, |\\Psi_2>,..., |\\Psi_n>\\}$ if and only if $|\\Psi_1>, |\\Psi_2>,...,$ and $|\\Psi_n>$ are linearly independent. We also generalize the probabilistic NOT transformation to the conjugate transformation in the multi-level quantum system. The lower bound of the best possible efficiencies attained by a probabilistic perfect conjugate transformation are obtained.

  18. High compression ratio turbo gasoline engine operation using alcohol enhancement

    E-Print Network [OSTI]

    Lewis, Raymond (Raymond A.)

    2013-01-01T23:59:59.000Z

    Gasoline - ethanol blends were explored as a strategy to mitigate engine knock, a phenomena in spark ignition engine combustion when a portion of the end gas is compressed to the point of spontaneous auto-ignition. This ...

  19. Undecimated Wavelet Transforms for Image De-noising

    SciTech Connect (OSTI)

    Gyaourova, A; Kamath, C; Fodor, I K

    2002-11-19T23:59:59.000Z

    A few different approaches exist for computing undecimated wavelet transform. In this work we construct three undecimated schemes and evaluate their performance for image noise reduction. We use standard wavelet based de-noising techniques and compare the performance of our algorithms with the original undecimated wavelet transform, as well as with the decimated wavelet transform. The experiments we have made show that our algorithms have better noise removal/blurring ratio.

  20. Metrics for enterprise transformation

    E-Print Network [OSTI]

    Blackburn, Craig D. (Craig David), S. M. Massachusetts Institute of Technology

    2009-01-01T23:59:59.000Z

    The objective of this thesis is to depict the role of metrics in the evolving journey of enterprise transformation. To this end, three propositions are explored: (i) metrics and measurement systems drive transformation, ...

  1. STATISTICAL PROPERTIES OF STFT RATIOS FOR TWO CHANNEL SYSTEMS AND APPLICATIONS TO BLIND SOURCE SEPARATION

    E-Print Network [OSTI]

    Maryland at College Park, University of

    SEPARATION Radu Balan and Justinian Rosca frvbalan,roscag@scr.siemens.com Siemens Corporate Research Princeton, NJ 08540 ABSTRACT The ratio of the short time Fourier transform (STFT) coe cients of signals

  2. Evaluating Transformer Losses

    E-Print Network [OSTI]

    Grun, R. L. Jr.

    therefore are a function of the load squared. No-load losses occur from energizing the transformer steel and fore are continuous regardless of the transformer load. TRANSFORMER DESIGN Both types of losses are a fun ce here ion of design. If losses...

  3. Spacetime transformation acoustics

    E-Print Network [OSTI]

    C. García-Meca; S. Carloni; C. Barceló; G. Jannes; J. Sánchez-Dehesa; A. Martínez

    2014-07-08T23:59:59.000Z

    A recently proposed analogue transformation method has allowed the extension of transformation acoustics to general spacetime transformations. We analyze here in detail the differences between this new analogue transformation acoustics (ATA) method and the standard one (STA). We show explicitly that STA is not suitable for transformations that mix space and time. ATA takes as starting point the acoustic equation for the velocity potential, instead of that for the pressure as in STA. This velocity-potential equation by itself already allows for some transformations mixing space and time, but not all of them. We explicitly obtain the entire set of transformations that do not leave its form invariant. It is in these cases that ATA shows its true potential, allowing for building a transformation acoustics method that enables the full range of spacetime transformations. We provide an example of an important transformation which cannot be achieved with STA. Using this transformation, we design and simulate an acoustic frequency converter via the ATA approach. Furthermore, in those cases in which one can apply both the STA and ATA approaches, we study the different transformational properties of the corresponding physical quantities.

  4. LAPPED TRANSFORMS COMPRESSION

    E-Print Network [OSTI]

    de Queiroz, Ricardo L.

    Chapter 6 LAPPED TRANSFORMS FOR IMAGE COMPRESSION Ricardo L. de Queiroz Digital Imaging Technology aspects of lapped transforms and their applications to image compression. It is a subject that has been extensively studied mainly because lapped transforms are closely related to filter banks, wavelets, and time

  5. System and method for high precision isotope ratio destructive analysis

    DOE Patents [OSTI]

    Bushaw, Bruce A; Anheier, Norman C; Phillips, Jon R

    2013-07-02T23:59:59.000Z

    A system and process are disclosed that provide high accuracy and high precision destructive analysis measurements for isotope ratio determination of relative isotope abundance distributions in liquids, solids, and particulate samples. The invention utilizes a collinear probe beam to interrogate a laser ablated plume. This invention provides enhanced single-shot detection sensitivity approaching the femtogram range, and isotope ratios that can be determined at approximately 1% or better precision and accuracy (relative standard deviation).

  6. Development of Toroidal Core Transformers

    SciTech Connect (OSTI)

    Leon, Francisco

    2014-05-31T23:59:59.000Z

    The original objective of this project was to design, build and test a few prototypes of singlephase dry-type distribution transformers of 25 kVA, 2.4 kV primary to 120 V transformers using cores made of a continuous steel strip shaped like a doughnut (toroid). At different points during the development of the project, the scope was enhanced to include the more practical case of a 25 kVA transformer for a 13.8 kV primary system voltage. Later, the scope was further expanded to design and build a 50 kVA unit to transformer voltage from 7.62 kV to 2x120 V. This is a common transformer used by Con Edison of New York and they are willing to test it in the field. The project officially started in September 2009 and ended in May 2014. The progress was reported periodically to DOE in eighteen quarterly reports. A Continuation Application was submitted to DOE in June 2010. In May 2011 we have requested a non-cost extension of the project. In December 2011, the Statement of Project Objectives (SOPO) was updated to reflect the real conditions and situation of the project as of 2011. A second Continuation Application was made and funding was approved in 2013 by DOE and the end date was extended to May 2014. The technical challenges that were overcome in this project include: the development of the technology to pass the impulse tests, derive a model for the thermal performance, produce a sound mechanical design, and estimate the inrush current. However, the greatest challenge that we faced during the development of the project was the complications of procuring the necessary parts and materials to build the transformers. The actual manufacturing process is relatively fast, but getting all parts together is a very lengthy process. The main products of this project are two prototypes of toroidal distribution transformers of 7.62 kV (to be used in a 13.8 kV system) to 2x120 V secondary (standard utilization voltage); one is rated at 25 kVA and the other at 50 kVA. The 25 kVA transformer passed the impulse test in KEMA high-voltage laboratories. Additional products include: nine papers published in the IEEE Transactions on Power Delivery, one patent has been filed, three PhD students weresupported from beginning to graduation, five postdoctoral fellows, and three MSc students were partially supported. The electrical characteristics of our dry-type toroidal transformers are similar to those of the oil-immersed pole mounted transformers currently in use by many utilities, but toroids have higher efficiency. The no-load losses of the 50 kVA prototype are only 45 W. A standard transformer has no-load losses between 90 and 240 W. Thus, even the finest transformer built today with standard technology has double the amount of no-load losses than the prototype toroidal transformer. When the manufacturing process is prepared for mass production, the cost of a dry-type toroidal transformer would be similar to the price of an oil-filed standard design. However, because of the greatly reduced losses, the total ownership cost of a toroidal transformer could be about half of a traditional design. We got a grant from Power Bridge NY in the amount of $149,985 from June 2014 to May 2015 to continue developing the transformer with commercialization objectives. We are considering the possibility to incorporate a company to manufacture the transformers and have contacted investors. The current status of the real life testing is as follows: after several months of silence, Con Edison has re-started conversations and has shown willingness to test the transformer. Other companies, PSE&G and National Grid have recently also shown interest and we will present our product to them soon.

  7. Large power transformers

    SciTech Connect (OSTI)

    Karsai, K.; Kerenyi, D.; Kiss, L.

    1987-01-01T23:59:59.000Z

    The book deals with the following aspects of transformer engineering: general principles governing the function of transformers, iron cores, windings, stray losses caused by stray flux, the insulation of transformers, and the structural parts and accessories. This edition includes the developments in theory and practice on the basis of the authors' experience in design, manufacturing and testing of large transformers. New developments have been particularly extensive in the fields of new magnetic materials, cooling methods, dielectric strength for overvoltages of different types, and stray-load loss problems, which are presented in the book in detail. The many diagrams in the book can be used directly in the design, manufacture and testing of large transformers. In preparing their text, the authors have aimed to satisfy the demand for a work that summarizes the latest experience in development and design of large power transformers.

  8. Beam-induced graphitic carbon cage transformation from sumanene aggregates

    SciTech Connect (OSTI)

    Fujita, Jun-ichi, E-mail: fujita@bk.tsukuba.ac.jp; Tachi, Masashi; Murakami, Katsuhisa [Institute of Applied Physics, University of Tsukuba, Tsukuba 305-8573 (Japan); Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), Tsukuba 305-8573 (Japan); Sakurai, Hidehiro; Morita, Yuki; Higashibayashi, Shuhei [Research Center of Integrative Molecular Systems, Institute for Molecular Science, Myodaiji, Okazaki 444-8787 (Japan); Takeguchi, Masaki [Transmission Electron Microscopy Station, National Institute for Materials Science, Tsukuba 305-0047 (Japan)

    2014-01-27T23:59:59.000Z

    We found that electron-beam irradiation of sumanene aggregates strongly enhanced their transformation into a graphitic carbon cage, having a diameter of about 20?nm. The threshold electron dose was about 32 mC/cm{sup 2} at 200?keV, but the transformation is still induced at 20?keV. The transformation sequence suggested that the cage was constructed accompanied by the dynamical movement of the transiently linked sumanene molecules in order to pile up inside the shell. Thus, bond excitation in the sumanene molecules rather than a knock-on of carbon atoms seems to be the main cause of the cage transformation.

  9. Grid Transformation Workshop

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

    3-03-Grid-Transformation-Workshop Sign In About | Careers | Contact | Investors | bpa.gov Search News & Us Expand News & Us Projects & Initiatives Expand Projects &...

  10. High ratio recirculating gas compressor

    DOE Patents [OSTI]

    Weinbrecht, J.F.

    1989-08-22T23:59:59.000Z

    A high ratio positive displacement recirculating rotary compressor is disclosed. The compressor includes an integral heat exchanger and recirculation conduits for returning cooled, high pressure discharge gas to the compressor housing to reducing heating of the compressor and enable higher pressure ratios to be sustained. The compressor features a recirculation system which results in continuous and uninterrupted flow of recirculation gas to the compressor with no direct leakage to either the discharge port or the intake port of the compressor, resulting in a capability of higher sustained pressure ratios without overheating of the compressor. 10 figs.

  11. All Metal Iron Core For A Low Aspect Ratio Tokamak

    SciTech Connect (OSTI)

    D.A. Gates, C. Jun, I. Zatz, A. Zolfaghari

    2010-06-02T23:59:59.000Z

    A novel concept for incorporating a iron core transformer within a axisymmetric toroidal plasma containment device with a high neutron flux is described. This design enables conceptual design of low aspect ratio devices which employ standard transformer-driven plasma startup by using all-metal high resistance separators between the toroidal field windings. This design avoids the inherent problems of a multiturn air core transformer which will inevitably suffer from strong neutron bombardment and hence lose the integrity of its insulation, both through long term material degradation and short term neutron- induced conductivity.. A full 3-dimensional model of the concept has been developed within the MAXWELL program and the resultant loop voltage calculated. The utility of the result is found to be dependent on the resistivity of the high resistance separators. Useful loop voltage time histories have been obtained using achievable resistivities.

  12. transform your thinking transform your environment

    E-Print Network [OSTI]

    Subramanian, Venkat

    the approach is a logical extension of Olin professors' research-driven thinking, applied mind. Business leaders from across the globe come to Olin for models and methods that enhance organizational

  13. Biochemical transformation of coals

    DOE Patents [OSTI]

    Lin, M.S.; Premuzic, E.T.

    1999-03-23T23:59:59.000Z

    A method of biochemically transforming macromolecular compounds found in solid carbonaceous materials, such as coal is provided. The preparation of new microorganisms, metabolically weaned through challenge growth processes to biochemically transform solid carbonaceous materials at extreme temperatures, pressures, pH, salt and toxic metal concentrations is also disclosed. 7 figs.

  14. Exploring Functional Mellin Transforms

    E-Print Network [OSTI]

    J. LaChapelle

    2015-01-08T23:59:59.000Z

    We define functional Mellin transforms within a scheme for functional integration proposed in [1]. Functional Mellin transforms can be used to define functional traces, logarithms, and determinants. The associated functional integrals are useful tools for probing function spaces in general and $C^\\ast$-algebras in particular. Several interesting aspects are explored.

  15. Deployment & Market Transformation (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2012-04-01T23:59:59.000Z

    NREL's deployment and market transformation (D and MT) activities encompass the laboratory's full range of technologies, which span the energy efficiency and renewable energy spectrum. NREL staff educates partners on how they can advance sustainable energy applications and also provides clients with best practices for reducing barriers to innovation and market transformation.

  16. Logarithmic transformation of response Logarithmic transformation of response

    E-Print Network [OSTI]

    Komarek, Arnost

    Logarithmic transformation of response Logarithmic transformation of response Often, support S of Y is S = (0, ). Logarithm is then one of transformations to consider when trying to obtain a correct (wrong. Model Building 1. Transformation of response #12;Logarithmic transformation of response When does

  17. Program Transformation Mechanics A Classification of Mechanisms for Program Transformation

    E-Print Network [OSTI]

    Utrecht, Universiteit

    Program Transformation Mechanics A Classification of Mechanisms for Program Transformation with a Survey of Existing Transformation Systems Jonne van Wijngaarden Eelco Visser UU-CS-2003-048 Institute Transformation Mechanics A Classification of Mechanisms for Program Transformation with a Survey of Existing

  18. IMAGINED TRANSFORMATIONS 1 Running head: IMAGINED TRANSFORMATION OF BODIES

    E-Print Network [OSTI]

    Zacks, Jeffrey M.

    IMAGINED TRANSFORMATIONS 1 Running head: IMAGINED TRANSFORMATION OF BODIES Imagined Transformations TRANSFORMATIONS 2 Abstract A number of spatial reasoning problems can be solved by performing an imagined transformation of one's egocentric perspective. A series of experiments were carried out to characterize

  19. A discrete fractional random transform

    E-Print Network [OSTI]

    Zhengjun Liu; Haifa Zhao; Shutian Liu

    2006-05-20T23:59:59.000Z

    We propose a discrete fractional random transform based on a generalization of the discrete fractional Fourier transform with an intrinsic randomness. Such discrete fractional random transform inheres excellent mathematical properties of the fractional Fourier transform along with some fantastic features of its own. As a primary application, the discrete fractional random transform has been used for image encryption and decryption.

  20. Real-time transient testing and performance of transformer differential relays

    SciTech Connect (OSTI)

    Stringer, N.T.; Lawhead, L.; Wilkerson, T.; Biggs, J. [Basler Electric Co., Highland, IL (United States); Rockefeller, G.D. [Rockefeller Associates, Inc., Morris Plains, NJ (United States)

    1995-12-31T23:59:59.000Z

    Differential relays are used extensively to provide protection for power transformers. Several issues must be considered in their application to ensure adequate protection. These include transformer magnetizing inrush current, relay burden and current transformer performance. The use of low ratio current transformers in high magnitude fault applications can produce distorted secondary waveforms to the relay whose performance may be directly affected. There is also a relationship between the magnetizing inrush and current transformer performance which may affect the operation of the differential relay. This paper discusses these specific applications and the testing of a transformer differential relay under conditions of saturated CT`s using the Electro-Magnetic Transient Program (EMTP).

  1. Lorentz transformation by mimicking the Lorentz transformation

    E-Print Network [OSTI]

    Bernhard Rothenstein; Stefan Popescu

    2007-09-24T23:59:59.000Z

    We show that starting with the fact that special relativity theory is concerned with a distortion of the observed length of a moving rod, without mentioning if it is a "contraction" or "dilation", we can derive the Lorentz transformations for the spacetime coordinates of the same event. This derivation is based on expressing the length of the moving rod as a sum of components with all the lengths involved in this summation being measured by the observers of the same inertial reference frame.

  2. Applying Improved Efficiency Transformers

    E-Print Network [OSTI]

    Haggerty, N. K.; Malone, T. P.

    primary and secondary windings, and vary significantly with transformer loading. Load or conductor losses vary with the square of the per unit load. Average full load losses of a 1500 kVA transformer can range from 11 to 21 kW. Manufacturers can... to meet the requirements of a particular transformer specification. These designs will have varying amounts of core steel and copper or aluminum conductors with differing no-load and load losses. The lowest cost design that meets all the applicable...

  3. Flexible Conversion Ratio Fast Reactor Systems Evaluation

    SciTech Connect (OSTI)

    Neil Todreas; Pavel Hejzlar

    2008-06-30T23:59:59.000Z

    Conceptual designs of lead-cooled and liquid salt-cooled fast flexible conversion ratio reactors were developed. Both concepts have cores reated at 2400 MWt placed in a large-pool-type vessel with dual-free level, which also contains four intermediate heat exchanges coupling a primary coolant to a compact and efficient supercritical CO2 Brayton cycle power conversion system. Decay heat is removed passively using an enhanced Reactor Vessel Auxiliary Cooling System and a Passive Secondary Auxiliary Cooling System. The most important findings were that (1) it is feasible to design the lead-cooled and salt-cooled reactor with the flexible conversion ratio (CR) in the range of CR=0 and CR=1 n a manner that achieves inherent reactor shutdown in unprotected accidents, (2) the salt-cooled reactor requires Lithium thermal Expansion Modules to overcme the inherent salt coolant's large positive coolant temperature reactivity coefficient, (3) the preferable salt for fast spectrum high power density cores is NaCl-Kcl-MgCl2 as opposed to fluoride salts due to its better themal-hydraulic and neutronic characteristics, and (4) both reactor, but attain power density 3 times smaller than that of the sodium-cooled reactor.

  4. Transforming California's Freight Transport System

    E-Print Network [OSTI]

    California at Davis, University of

    Transforming California's Freight Transport System Policy Forum on the Role of Freight Transport Standard #12;2050 Vision- Key Conceptual Outcomes Technology Transformation Early Action Cleaner Combustion Multiple Strategies Federal Action Efficiency Gains Energy Transformation 9 #12;Further reduce localized

  5. The Quantum Mellin transform

    E-Print Network [OSTI]

    J. Twamley; G. J. Milburn

    2007-02-12T23:59:59.000Z

    We uncover a new type of unitary operation for quantum mechanics on the half-line which yields a transformation to ``Hyperbolic phase space''. We show that this new unitary change of basis from the position x on the half line to the Hyperbolic momentum $p_\\eta$, transforms the wavefunction via a Mellin transform on to the critial line $s=1/2-ip_\\eta$. We utilise this new transform to find quantum wavefunctions whose Hyperbolic momentum representation approximate a class of higher transcendental functions, and in particular, approximate the Riemann Zeta function. We finally give possible physical realisations to perform an indirect measurement of the Hyperbolic momentum of a quantum system on the half-line.

  6. Transformation inverse design

    E-Print Network [OSTI]

    Liu, David

    We present a new technique for the design of transformation-optics devices based on large-scale optimization to achieve the optimal effective isotropic dielectric materials within prescribed index bounds, which is ...

  7. Enhancing Optical Gradient Forces with Metamaterials Vincent Ginis,1

    E-Print Network [OSTI]

    Enhancing Optical Gradient Forces with Metamaterials Vincent Ginis,1 Philippe Tassin,2,* Costas M demonstrate how the optical gradient force between two waveguides can be enhanced using transformation optics perceived by light, resulting in a more than tenfold enhancement of the optical force. This process

  8. Functional Mellin Transforms

    E-Print Network [OSTI]

    J. LaChapelle

    2015-01-07T23:59:59.000Z

    Functional integrals are defined in terms of locally compact topological groups and their associated Banach-valued Haar integrals. This approach generalizes the functional integral scheme of Cartier and DeWitt-Morette. The definition allows a construction of functional Mellin transforms. In turn, the functional Mellin transforms can be used to define functional traces, logarithms, and determinants. The associated functional integrals are useful tools for probing function spaces in general and $C^\\ast$-algebras in particular. Several interesting aspects are explored.

  9. Enhancing practice Quality Enhancement Themes

    E-Print Network [OSTI]

    Azzopardi, Leif

    .sparqs.org.uk) a national programme of Enhancement Themes aimed at developing and sharing good practice to enhance of establishing a programme of development activities, which draw on national and international good practice Scotland #12;Contents Acknowledgements 1 1 Outline and scope 2 2 A guide for readers 3 3 Practical

  10. Optical transformation from chirplet to fractional Fourier transformation kernel

    E-Print Network [OSTI]

    Hong-yi Fan; Li-yun Hu

    2009-02-11T23:59:59.000Z

    We find a new integration transformation which can convert a chirplet function to fractional Fourier transformation kernel, this new transformation is invertible and obeys Parseval theorem. Under this transformation a new relationship between a phase space function and its Weyl-Wigner quantum correspondence operator is revealed.

  11. From transformation traces to transformation rules: Assisting Model Driven Engineering

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    From transformation traces to transformation rules: Assisting Model Driven Engineering approach. In this paper we are interested in semi-automatically gen- erating labelled graph (model) transformations conform to a particu- lar syntax (meta-model). Those transformations are basic operations in model driven

  12. Laplace Transforms An integral transform is an operator

    E-Print Network [OSTI]

    Ikenaga, Bruce

    9­28­1998 Laplace Transforms An integral transform is an operator F (s) = Z b a K(s; t)f(t) dt: The input to the transform is the function f(t); the output is the function F (s). (By convention, small letters denote the inputs to a transform, and the corresponding capital letters denote the corresponding

  13. APPENDIX F. TRANSFORMS, COMPLEX ANALYSIS 1 Transforms, Complex

    E-Print Network [OSTI]

    Callen, James D.

    APPENDIX F. TRANSFORMS, COMPLEX ANALYSIS 1 Appendix F Transforms, Complex Analysis This appendix discusses Fourier and Laplace transforms as they are used in plasma physics and this book. Also, key properties of complex variable theory that are needed for understanding and inverting these transforms

  14. Generalization of Conformal Transformations

    E-Print Network [OSTI]

    G. I. Garas'ko

    2005-09-19T23:59:59.000Z

    Conformal transformations of a Euclidean (complex) plane have some kind of completeness (sufficiency) for the solution of many mathematical and physical-mathematical problems formulated on this plane. There is no such completeness in the case of Euclidean, pseudo-Euclidean and polynumber spaces of dimension greater than two. In the present paper we show that using the concepts of analogical geometries allows us to generalize conformal transformations not only to the case of Euclidean or pseudo-Euclidean spaces, but also to the case of Finsler spaces, analogous to the spaces of affine connectedness. Examples of such transformations in the case of complex and hypercomplex numbers H_4 are presented. In the general case such transformations form a group of transitions, the elements of which can be viewed as transitions between projective Euclidean geometries of a distinguished class fixed by the choice of metric geometry admitting affine coordinates. The correlation between functions realizing generalized conformal transformations and generalized analytical functions can appear to be productive for the solution of fundamental problems in theoretical and mathematical physics.

  15. Discrete Fourier Transform Javier Montoya

    E-Print Network [OSTI]

    Giger, Christine

    Discrete Fourier Transform Javier Montoya Photogrammetry and Remote Sensing ETH Zurich March 16, 2012 1 Introduction The Discrete form of the Fourier transform is known as Discrete Fourier Transform domain using the Inverse Discrete Fourier Transform (IDFT): f(x) = 1 N N-1 x=0 F(u)ej 2 N ux for u = 0, 1

  16. Envera Variable Compression Ratio Engine

    SciTech Connect (OSTI)

    Charles Mendler

    2011-03-15T23:59:59.000Z

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

  17. Coordinate transformations in quaternion spaces

    E-Print Network [OSTI]

    Zihua Weng

    2009-05-15T23:59:59.000Z

    The quaternion spaces can be used to describe the property of electromagnetic field and gravitational field. In the quaternion space, some coordinate transformations can be deduced from the feature of quaternions, including Lorentz transformation and Galilean transformation etc., when the coordinate system is transformed into others. And some coordinate transformations with variable speed of light can be obtained in the electromagnetic field and gravitational field.

  18. Fourier Transform Infrared Spectroscopy

    E-Print Network [OSTI]

    Nizkorodov, Sergey

    FTIR - 1 Fourier Transform Infrared Spectroscopy FTIR DETERMINATION OF MTBE IN GASOLINE AND ETHANOL FTIR DETERMINATION OF MTBE IN GASOLINE AND ETHANOL IN VODKA AND MOUTHWASH INTRODUCTION As a part has contained MTBE (methyl tert­butyl ether) as its primary oxygenate. However, there has been

  19. Transforming Education at Einstein

    E-Print Network [OSTI]

    Yates, Andrew

    Transforming Education at Einstein EinstEin Winter/spring 2012 The Magazine for Alumni and Friends of Albert Einstein College of Medicine of Yeshiva University #12;2 EinstEin : WintEr/spring 2012 Meet Our interactive Companion Magazine Give Einstein's "virtual" version a try! this interactive version

  20. Research Councils UK Transforming

    E-Print Network [OSTI]

    Berzins, M.

    Research Councils UK Transforming our energy future #12;Research funded by the Research Councils in 2002 to create a viable renewable energy research community to foster industrial engagement of research, expertise and the business capability to develop and exploit them commercially. Energy and its

  1. TO TRANSFORM BIOMEDICAL ENGINEERING

    E-Print Network [OSTI]

    IT'S TIME TO TRANSFORM BIOMEDICAL ENGINEERING EDUCATION #12;Charles H. & Bettye Barclay Professor Head, Department of Biomedical Engineering Texas A&M University We're dedicated to solving the world in biomedical engineering research and education ­ and we're well on our way. Our faculty continues to engineer

  2. Enhancing Resource Sustainability by Transforming Urban and Suburban Transportation

    E-Print Network [OSTI]

    Delucchi, Mark

    2009-01-01T23:59:59.000Z

    Transportation Water Pollution Oil, fuel, coolant, and otherof the reductions in oil use, noise, water pollution, airoil use and climate change costs (but probably not lower air pollution

  3. Enhancing Resource Sustainability by Transforming Urban and Suburban Transportation

    E-Print Network [OSTI]

    Delucchi, Mark

    2009-01-01T23:59:59.000Z

    battery electric LLM will have about the same life cycle costBattery contribution to retail cost (€) Average maintenance cost (€/yr) Energy cost (€/l or €/kWh) (a) Total life cycle cost (

  4. Algorithms for transform selection in multiple-transform video compression

    E-Print Network [OSTI]

    Cai, Xun, S.M. Massachusetts Institute of Technology

    2012-01-01T23:59:59.000Z

    Selecting proper transforms for video compression has been based on the rate-distortion criterion. Transforms that appear reasonable are incorporated into a video coding system and their performance is evaluated. This ...

  5. Variable ratio regenerative braking device

    DOE Patents [OSTI]

    Hoppie, Lyle O. (Birmingham, MI)

    1981-12-15T23:59:59.000Z

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

  6. Weather-Corrected Performance Ratio

    SciTech Connect (OSTI)

    Dierauf, T.; Growitz, A.; Kurtz, S.; Cruz, J. L. B.; Riley, E.; Hansen, C.

    2013-04-01T23:59:59.000Z

    Photovoltaic (PV) system performance depends on both the quality of the system and the weather. One simple way to communicate the system performance is to use the performance ratio (PR): the ratio of the electricity generated to the electricity that would have been generated if the plant consistently converted sunlight to electricity at the level expected from the DC nameplate rating. The annual system yield for flat-plate PV systems is estimated by the product of the annual insolation in the plane of the array, the nameplate rating of the system, and the PR, which provides an attractive way to estimate expected annual system yield. Unfortunately, the PR is, again, a function of both the PV system efficiency and the weather. If the PR is measured during the winter or during the summer, substantially different values may be obtained, making this metric insufficient to use as the basis for a performance guarantee when precise confidence intervals are required. This technical report defines a way to modify the PR calculation to neutralize biases that may be introduced by variations in the weather, while still reporting a PR that reflects the annual PR at that site given the project design and the project weather file. This resulting weather-corrected PR gives more consistent results throughout the year, enabling its use as a metric for performance guarantees while still retaining the familiarity this metric brings to the industry and the value of its use in predicting actual annual system yield. A testing protocol is also presented to illustrate the use of this new metric with the intent of providing a reference starting point for contractual content.

  7. SPEECH ENHANCEMENT USING HARMONIC REGENERATION Cyril Plapous 1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    SPEECH ENHANCEMENT USING HARMONIC REGENERATION Cyril Plapous 1 , Claude Marro 1 , Pascal Scalart 2 in enhanced speech because of the non reliability of estimators for small signal- to-noise ratios. We propose The problem of enhancing speech degraded by additive noise, when only the noisy speech is available, has been

  8. Liquid Metal Transformers

    E-Print Network [OSTI]

    Sheng, Lei; Liu, Jing

    2014-01-01T23:59:59.000Z

    The room temperature liquid metal is quickly emerging as an important functional material in a variety of areas like chip cooling, 3D printing or printed electronics etc. With diverse capabilities in electrical, thermal and flowing behaviors, such fluid owns many intriguing properties that had never been anticipated before. Here, we show a group of unconventional phenomena occurring on the liquid metal objects. Through applying electrical field on the liquid metals immersed in water, a series of complex transformation behaviors such as self-assembling of a sheet of liquid metal film into a single sphere, quick mergences of separate metal droplets, controlled self-rotation and planar locomotion of liquid metal objects can be realized. Meanwhile, it was also found that two accompanying water vortexes were induced and reliably swirled near the rotating liquid metal sphere. Further, effects of the shape, size, voltage, orientation and geometries of the electrodes to control the liquid metal transformers were clar...

  9. FOURIER TRANSFORM MULTIPLE QUANTUM NMR

    E-Print Network [OSTI]

    Drobny, G.

    2011-01-01T23:59:59.000Z

    of transition observed in Fourier transform multiple quantumDecember 18-19, 1979 FOURIER TRANSFORM MULTIPLE QUANTUM NMRof London, December 1978. FOURIER TRANSFO~~ MULTIPLE QUANTUM

  10. Generalized Transforms and Special Functions

    E-Print Network [OSTI]

    G. Dattoli; E. Sabia

    2010-10-08T23:59:59.000Z

    We study the properties of different type of transforms by means of operational methods and discuss the relevant interplay with many families of special functions. We consider in particular the binomial transform and its generalizations. A general method, based on the use of the Fourier transform technique, is proposed for the study of the properties of functions of operators.

  11. Market Transformation Fact Sheet

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking ofOil & GasTechnical Publications » Market Analysis Transformation

  12. Transforming Commercial Building Operations

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideoStrategic|IndustrialCenter Gets People Work,Amy Hollander: I'dTransforming

  13. Liquid Metal Transformers

    E-Print Network [OSTI]

    Lei Sheng; Jie Zhang; Jing Liu

    2014-01-30T23:59:59.000Z

    The room temperature liquid metal is quickly emerging as an important functional material in a variety of areas like chip cooling, 3D printing or printed electronics etc. With diverse capabilities in electrical, thermal and flowing behaviors, such fluid owns many intriguing properties that had never been anticipated before. Here, we show a group of unconventional phenomena occurring on the liquid metal objects. Through applying electrical field on the liquid metals immersed in water, a series of complex transformation behaviors such as self-assembling of a sheet of liquid metal film into a single sphere, quick mergences of separate metal droplets, controlled self-rotation and planar locomotion of liquid metal objects can be realized. Meanwhile, it was also found that two accompanying water vortexes were induced and reliably swirled near the rotating liquid metal sphere. Further, effects of the shape, size, voltage, orientation and geometries of the electrodes to control the liquid metal transformers were clarified. Such events are hard to achieve otherwise on rigid metal or conventional liquid spheres. This finding has both fundamental and practical significances which suggest a generalized way of making smart soft machine, collecting discrete metal fluids, as well as flexibly manipulating liquid metal objects including accompanying devices.

  14. Transforming PV Installations toward Dispatchable, Schedulable...

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

    Transforming PV Installations toward Dispatchable, Schedulable Energy Solutions Transforming PV Installations toward Dispatchable, Schedulable Energy Solutions Advanced Energy...

  15. LU transformation invariant operators and LU transformation invariant

    E-Print Network [OSTI]

    Xin-wei Zha; Chun-min Zhang

    2007-02-06T23:59:59.000Z

    We proposed a concept of LU transformation invariant operators. By using this operator, arbitrary multi-qubit states LU transformation invariant and SLOCC invariant could be easily obtained. And we find that presences two kinds of invariant operators and corresponding invariants. One kind of operators yields LU invariants and the other operators results in SLOCC invariants. For three-qubit states, all independence LU transformation invariant are obtained. Furthermore, by this system method, arbitrary multi-qubit states invariants can be given.

  16. Fourier transform and related integral transforms in superspace

    E-Print Network [OSTI]

    Hendrik De Bie

    2008-05-13T23:59:59.000Z

    In this paper extensions of the classical Fourier, fractional Fourier and Radon transforms to superspace are studied. Previously, a Fourier transform in superspace was already studied, but with a different kernel. In this work, the fermionic part of the Fourier kernel has a natural symplectic structure, derived using a Clifford analysis approach. Several basic properties of these three transforms are studied. Using suitable generalizations of the Hermite polynomials to superspace (see [H. De Bie, F. Sommen, Hermite and Gegenbauer polynomials in superspace using Clifford analysis, J. Phys. A 40 (2007) 10441-10456]) an eigenfunction basis for the Fourier transform is constructed.

  17. z Transform Chapter Intended Learning Outcomes

    E-Print Network [OSTI]

    So, Hing-Cheung

    z Transform Chapter Intended Learning Outcomes: (i) Understanding the relationship between transform and the Fourier transform for discrete-time signals (ii) Understanding the characteristics and properties of transform (iii) Ability to compute transform and inverse transform (iv) Ability to apply

  18. Multifunctional porous silicon nanopillar arrays: antireflection, superhydrophobicity, photoluminescence, and surface-enhanced Raman scattering

    E-Print Network [OSTI]

    Multifunctional porous silicon nanopillar arrays: antireflection, superhydrophobicity nanopillar arrays: antireflection, superhydrophobicity, photoluminescence, and surface-enhanced Raman without any optimization, and approaching superhydrophobic behavior with increasing aspect ratio

  19. Transformational Manufacturing | Argonne National Laboratory

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

    about 12 million people and generates another 7 million jobs in related businesses. Argonne is working with industry to develop innovative and transformational technology to...

  20. Transformation Nets -A Runtime Model for Transformation Languages

    E-Print Network [OSTI]

    Hochreiter, Sepp

    as first-class arti- facts throughout the software lifecycle requiring the availability of proper of Software Technology and Interactive Systems Vienna University of Technology Favoritenstraße 9)--called Transformation Nets--for the development, execution and debugging of model transformations on a high level

  1. Eccentric crank variable compression ratio mechanism

    DOE Patents [OSTI]

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

    2008-05-13T23:59:59.000Z

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

  2. Abundance Ratios in Early-Type Galaxies

    E-Print Network [OSTI]

    Reynier Peletier

    1999-04-21T23:59:59.000Z

    Although evidence is accumulating that abundance ratios in galaxies are often non-solar, they are far from understood. I resume the current evidence for non-solar abundance ratios, supplementing the recent review by Worthey (1998) with some new results. It appears that the Mg/Fe abundance ratio only depends on the mass of the galaxy, not on the formation time-scale. For massive galaxies [Mg/Fe] > 0, while small galaxies show solar abundance ratios. Information about abundances of other element is scarce, but new evidence is given that [Ca/Fe] is solar, or slightly lower than solar, contrary to what is expected for an alpha-element.

  3. Managing Milk Composition: Feed Additives and Production Enhancers

    E-Print Network [OSTI]

    Stokes, Sandra R.; Jordan, Ellen R.; Looper, Mike; Waldner, Dan

    2000-12-14T23:59:59.000Z

    Feed additives play an essential role in enhancing production and yield of milk and milk components. Producers should, however, evaluate the cost-to-benefit ratio of each feed additive in their management systems. This publication explains how...

  4. BAYESIAN SINGLE CHANNEL SPEECH ENHANCEMENT EXPLOITING SPARSENESS IN THE ICA DOMAIN

    E-Print Network [OSTI]

    Maryland at College Park, University of

    BAYESIAN SINGLE CHANNEL SPEECH ENHANCEMENT EXPLOITING SPARSENESS IN THE ICA DOMAIN Liang Hong We propose a Bayesian single channel speech enhance- ment algorithm to exploit speech sparseness, further used to estimate enhanced speech in the time domain, and (2) ICA domain transformation of data

  5. Apparatus and methods for continuous beam fourier transform mass spectrometry

    DOE Patents [OSTI]

    McLuckey, Scott A. (Oak Ridge, TN); Goeringer, Douglas E. (Oak Ridge, TN)

    2002-01-01T23:59:59.000Z

    A continuous beam Fourier transform mass spectrometer in which a sample of ions to be analyzed is trapped in a trapping field, and the ions in the range of the mass-to-charge ratios to be analyzed are excited at their characteristic frequencies of motion by a continuous excitation signal. The excited ions in resonant motions generate real or image currents continuously which can be detected and processed to provide a mass spectrum.

  6. Inversion of the star transform

    E-Print Network [OSTI]

    Fan Zhao; John C. Schotland; Vadim A. Markel

    2014-05-06T23:59:59.000Z

    We define the star transform as a generalization of the broken ray transform introduced by us in previous work. The advantages of using the star transform include the possibility to reconstruct the absorption and the scattering coefficients of the medium separately and simultaneously (from the same data) and the possibility to utilize scattered radiation which, in the case of the conventional X-ray tomography, is discarded. In this paper, we derive the star transform from physical principles, discuss its mathematical properties and analyze numerical stability of inversion. In particular, it is shown that stable inversion of the star transform can be obtained only for configurations involving odd number of rays. Several computationally-efficient inversion algorithms are derived and tested numerically.

  7. The Hyperanalytic Wavelet Transform

    E-Print Network [OSTI]

    S. C. Olhede; G. Metikas

    2006-05-23T23:59:59.000Z

    In this paper novel classes of 2-D vector-valued spatial domain wavelets are defined, and their properties given. The wavelets are 2-D generalizations of 1-D analytic wavelets, developed from the Generalized Cauchy-Riemann equations and represented as quaternionic functions. Higher dimensionality complicates the issue of analyticity, more than one `analytic' extension of a real function is possible, and an `analytic' analysis wavelet will not necessarily construct `analytic' decomposition coefficients. The decomposition of locally unidirectional and/or separable variation is investigated in detail, and two distinct families of hyperanalytic wavelet coefficients are introduced, the monogenic and the hypercomplex wavelet coefficients. The recasting of the analysis in a different frame of reference and its effect on the constructed coefficients is investigated, important issues for sampled transform coefficients. The magnitudes of the coefficients are shown to exhibit stability with respect to shifts in phase. Hyperanalytic 2-D wavelet coefficients enable the retrieval of a phase-and-magnitude description of an image in phase space, similarly to the description of a 1-D signal with the use of 1-D analytic wavelets, especially appropriate for oscillatory signals. Existing 2-D directional wavelet decompositions are related to the newly developed framework, and new classes of mother wavelets are introduced.

  8. Ratio model serves suprathreshold color luminance discrimination

    E-Print Network [OSTI]

    Mullen, Kathy T.

    Ratio model serves suprathreshold color­ luminance discrimination Marcel J. Sankeralli and Kathy T quadrants of the red­ green/luminance and blue­yellow/luminance planes of cardinal color space. We showed model of suprathreshold color­luminance dis- crimination, in which discrimination depends on a ratio

  9. Formal Transformations and WSL Martin Ward

    E-Print Network [OSTI]

    Singer, Jeremy

    Formal Transformations and WSL Part Two Martin Ward STRL Senior Research Fellow Royal Society of Transformations #12;Types of Transformations A Syntactic Transformation changes the syntax of the program but preserves the exact sequence of operations carried out by the program. Many restructuring transformations

  10. Transformer Efficiency Assessment - Okinawa, Japan

    SciTech Connect (OSTI)

    Thomas L. Baldwin; Robert J. Turk; Kurt S. Myers; Jake P. Gentle; Jason W. Bush

    2012-05-01T23:59:59.000Z

    The US Army Engineering & Support Center, Huntsville (USAESCH), and the US Marine Corps Base (MCB), Okinawa, Japan retained Idaho National Laboratory (INL) to conduct a Transformer Efficiency Assessment of “key” transformers located at multiple military bases in Okinawa, Japan. The purpose of this assessment is to support the Marine Corps Base, Okinawa in evaluating medium voltage distribution transformers for potential efficiency upgrades. The original scope of work included the MCB providing actual transformer nameplate data, manufacturer’s factory test sheets, electrical system data (kWh), demand data (kWd), power factor data, and electricity cost data. Unfortunately, the MCB’s actual data is not available and therefore making it necessary to de-scope the original assessment. Note: Any similar nameplate data, photos of similar transformer nameplates, and basic electrical details from one-line drawings (provided by MCB) are not a replacement for actual load loss test data. It is recommended that load measurements are performed on the high and low sides of transformers to better quantify actual load losses, demand data, and power factor data. We also recommend that actual data, when available, be inserted by MCB Okinawa where assumptions have been made and then the LCC analysis updated. This report covers a generalized assessment of modern U.S. transformers in a three level efficiency category, Low-Level efficiency, Medium-Level efficiency, and High-Level efficiency.

  11. Transformer Efficiency Assessment - Okinawa, Japan

    SciTech Connect (OSTI)

    Thomas L. Baldwin; Robert J. Turk; Kurt S. Myers; Jake P. Gentle; Jason W. Bush

    2012-08-01T23:59:59.000Z

    The US Army Engineering & Support Center, Huntsville (USAESCH), and the US Marine Corps Base (MCB), Okinawa, Japan retained Idaho National Laboratory (INL) to conduct a Transformer Efficiency Assessment of “key” transformers located at multiple military bases in Okinawa, Japan. The purpose of this assessment is to support the Marine Corps Base, Okinawa in evaluating medium voltage distribution transformers for potential efficiency upgrades. The original scope of work included the MCB providing actual transformer nameplate data, manufacturer’s factory test sheets, electrical system data (kWh), demand data (kWd), power factor data, and electricity cost data. Unfortunately, the MCB’s actual data is not available and therefore making it necessary to de-scope the original assessment. Note: Any similar nameplate data, photos of similar transformer nameplates, and basic electrical details from one-line drawings (provided by MCB) are not a replacement for actual load loss test data. It is recommended that load measurements are performed on the high and low sides of transformers to better quantify actual load losses, demand data, and power factor data. We also recommend that actual data, when available, be inserted by MCB Okinawa where assumptions have been made and then the LCC analysis updated. This report covers a generalized assessment of modern U.S. transformers in a three level efficiency category, Low-Level efficiency, Medium-Level efficiency, and High-Level efficiency.

  12. DNA UPTAKE BY TRANSFORMABLE BACTERIA

    SciTech Connect (OSTI)

    LACKS,S.A.

    1999-09-07T23:59:59.000Z

    The various processes of DNA uptake by cells can be categorized as: viral DNA entry, conjugation, or transformation. Within each category, a variety of mechanisms have been found. However, considerable similarities occur among the different mechanisms of conjugation and, especially, transformation. All of these natural mechanisms of DNA transfer are quite elaborate and involve multiple protein components, as the case may be, of the virus, the donor cell, and the recipient cell. The mechanisms of viral infection and conjugation will be discussed mainly with respect to their relevance to transformation.

  13. Environ. Sci. Technol. M92, 26,2454-2461 In-Situ Transformation of Carbon Tetrachloride and Other Halogenated

    E-Print Network [OSTI]

    Semprini, Lewis

    Environ. Sci. Technol. M92, 26,2454-2461 In-Situ Transformation of Carbon Tetrachloride and Other, California 94305-4020 Enhanced in-situ transformation of carbon tetrachloride (CT) was observed under anoxic Chlorinated aliphatic hydrocarbons (CAHs)with one or two carbon atoms are widely used as solvents, degreasing

  14. TRANSFORMING ACADEMIA Historical Developments, Contemporary Perspectives and

    E-Print Network [OSTI]

    Li, Mo

    ISyE 8803A TRANSFORMING ACADEMIA Historical Developments, Contemporary Perspectives independence and this organizational structure represent the first major transformation of academia. These characteristics of academia have persisted for over 900 years and seem immutable. Yet, notable transformations

  15. Transforms for the Motion Compensation Residual

    E-Print Network [OSTI]

    Kamisli, Fatih

    The Discrete-Cosine-Transform (DCT) is the most widely used transform in image and video compression. Its use in image compression is often justified by the notion that it is the statistically optimal transform for first-order ...

  16. HIGH-TECH BUILDINGS MARKET TRANSFORMATION PROJECT

    E-Print Network [OSTI]

    LBNL-49112 HT-457 HIGH-TECH BUILDINGS MARKET TRANSFORMATION PROJECT Cleanroom Energy Benchmarking High-Performance Fume Hood Demonstration/Test Market Transformation Activities FINAL REPORT ........................................................................................3 Market Transformation Activities

  17. Ninja data analysis with a detection pipeline based on the Hilbert-Huang Transform

    E-Print Network [OSTI]

    Alexander Stroeer; Jordan Camp

    2009-03-11T23:59:59.000Z

    The Ninja data analysis challenge allowed the study of the sensitivity of data analysis pipelines to binary black hole numerical relativity waveforms in simulated Gaussian noise at the design level of the LIGO observatory and the VIRGO observatory. We analyzed NINJA data with a pipeline based on the Hilbert Huang Transform, utilizing a detection stage and a characterization stage: detection is performed by triggering on excess instantaneous power, characterization is performed by displaying the kernel density enhanced (KD) time-frequency trace of the signal. Using the simulated data based on the two LIGO detectors, we were able to detect 77 signals out of 126 above SNR 5 in coincidence, with 43 missed events characterized by signal to noise ratio SNR less than 10. Characterization of the detected signals revealed the merger part of the waveform in high time and frequency resolution, free from time-frequency uncertainty. We estimated the timelag of the signals between the detectors based on the optimal overlap of the individual KD time-frequency maps, yielding estimates accurate within a fraction of a millisecond for half of the events. A coherent addition of the data sets according to the estimated timelag eventually was used in a characterization of the event.

  18. Chinese Passives: Transformational or Lexical?

    E-Print Network [OSTI]

    Zhang, Jiuwu; Wen, Xiaohong

    1989-01-01T23:59:59.000Z

    There are two types of passive constructions in Chinese. Type I is a syntactic passive since it is derived through a transformational rule. Type II is a lexical passive. It has certain properties in common with the predicate ...

  19. Presidential address Geomycology: biogeochemical transformations

    E-Print Network [OSTI]

    Ahmad, Sajjad

    Corresponding Editor: David L. Hawksworth Keywords: Carbonates Clay minerals Environmental biotechnology Lichens of the fungal transformations discussed have beneficial applications in environmental biotechnology, e and radionuclides by fungi, bioweathering and bioremediation Geoffrey M. GADD* Division of Environmental and Applied

  20. Reservoir characterization using wavelet transforms

    E-Print Network [OSTI]

    Rivera Vega, Nestor

    2004-09-30T23:59:59.000Z

    Automated detection of geological boundaries and determination of cyclic events controlling deposition can facilitate stratigraphic analysis and reservoir characterization. This study applies the wavelet transformation, a recent advance in signal...

  1. Physical transformations between quantum states

    E-Print Network [OSTI]

    Zejun Huang; Chi-Kwong Li; Edward Poon; Nung-Sing Sze

    2012-10-26T23:59:59.000Z

    Given two sets of quantum states {A_1, ..., A_k} and {B_1, ..., B_k}, represented as sets of density matrices, necessary and sufficient conditions are obtained for the existence of a physical transformation T, represented as a trace-preserving completely positive map, such that T(A_i) = B_i for i = 1, ..., k. General completely positive maps without the trace-preserving requirement, and unital completely positive maps transforming the states are also considered.

  2. Coupled diffusional/displacive transformations

    E-Print Network [OSTI]

    Mujahid, Shafiq Ahmad

    ), TRIP steels (transformation in- duced plasticity), ausforming steels (plastically deformed austenite prior to quenching) and dual phase steels (a mixture of ferrite + martensite obtained by quenching from the 1+ Q' field). a c b d Figure 1... Supersaturated Ferrite Plates 137 v Abstract The displacive transformation of austenite to ferrite in steels containing both substitutional and interstitial elements has been studied. The aim was to establish the conditions under which plates of the product phase...

  3. Market Transformation: Fuel Cell Early Adoption (Presentation...

    Office of Environmental Management (EM)

    Transformation: Fuel Cell Early Adoption (Presentation) Market Transformation: Fuel Cell Early Adoption (Presentation) Presented at the DOE Fuel Cell Pre-Solicitation Workshop held...

  4. National Electric Delivery Technologies Roadmap: Transforming...

    Office of Environmental Management (EM)

    Delivery Technologies Roadmap: Transforming the Grid to Revolutionize Electric Power in North America National Electric Delivery Technologies Roadmap: Transforming the Grid to...

  5. Metamaterial flexible sheets could transform optics

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

    Metamaterial flexible sheets could transform optics Metamaterial flexible sheets could transform optics Advances would boost security screening systems, infrared thermal cameras,...

  6. Building America Expert Meeting: Transforming Existing Buildings...

    Energy Savers [EERE]

    Transforming Existing Buildings through New Media--An Idea Exchange Building America Expert Meeting: Transforming Existing Buildings through New Media--An Idea Exchange This report...

  7. Investigation of Mineral Transformations in Wet Supercritical...

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

    Mineral Transformations in Wet Supercritical CO2 by Electron Microscopy. Investigation of Mineral Transformations in Wet Supercritical CO2 by Electron Microscopy. Abstract: The...

  8. The Industrial Transformation of Subarctic Canada

    E-Print Network [OSTI]

    Mathoor, Vineeth

    2011-01-01T23:59:59.000Z

    in the subarctic region of Canada. The role of scientificTransformation of Subarctic Canada By Liza Piper Reviewed byTransformation of Subarctic Canada. Vancouver, BC: UBC

  9. Energy Department Finalizes Loan Guarantee for Transformational...

    Office of Environmental Management (EM)

    Transformational Rooftop Solar Project Energy Department Finalizes Loan Guarantee for Transformational Rooftop Solar Project September 30, 2011 - 3:37pm Addthis Washington D.C. -...

  10. Structure and Transformation of Amorphous Calcium Carbonate:...

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

    Transformation of Amorphous Calcium Carbonate: A Solid-State 43Ca NMR and Computational Molecular Dynamics Structure and Transformation of Amorphous Calcium Carbonate: A...

  11. Ecology Action: Small Market Advanced Retrofit Transformation...

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

    Ecology Action: Small Market Advanced Retrofit Transformation Program - 2015 Peer Review Ecology Action: Small Market Advanced Retrofit Transformation Program - 2015 Peer Review...

  12. Plasmon Enhanced Photoemission

    E-Print Network [OSTI]

    Polyakov, Aleksandr

    2013-01-01T23:59:59.000Z

    56 SPP Surface Plasmon7 SPR Surface Plasmon Resonance . . . . . .Quantum Efficiency . . . 1.3 Plasmon Enhancement . . . . .

  13. Continuous Cooling Transformation (CCT) Assistant Professor

    E-Print Network [OSTI]

    Cambridge, University of

    Continuous Cooling Transformation (CCT) Diagrams R. Manna Assistant Professor Centre of Advanced.ac.uk #12;Continuous cooling transformation (CCT) diagram There are two types of CCT diagrams I) Plot and transformation finish temperature against transformation time on each cooling curve II) Plot of (for each type

  14. Radioactive anomaly discrimination from spectral ratios

    DOE Patents [OSTI]

    Maniscalco, James; Sjoden, Glenn; Chapman, Mac Clements

    2013-08-20T23:59:59.000Z

    A method for discriminating a radioactive anomaly from naturally occurring radioactive materials includes detecting a first number of gamma photons having energies in a first range of energy values within a predetermined period of time and detecting a second number of gamma photons having energies in a second range of energy values within the predetermined period of time. The method further includes determining, in a controller, a ratio of the first number of gamma photons having energies in the first range and the second number of gamma photons having energies in the second range, and determining that a radioactive anomaly is present when the ratio exceeds a threshold value.

  15. Phase Transformations in Confined Nanosystems

    SciTech Connect (OSTI)

    Shield, Jeffrey E. [Department of Mechanical & Materials Engineering] [Department of Mechanical & Materials Engineering; Belashchenko, Kirill [Department of Physics & Astronomy] [Department of Physics & Astronomy

    2014-04-29T23:59:59.000Z

    This project discovered that non-equilibrium structures, including chemically ordered structures not observed in bulk systems, form in isolated nanoscale systems. Further, a generalized model was developed that effectively explained the suppression of equilibrium phase transformations. This thermodynamic model considered the free energy decrease associated with the phase transformation was less than the increase in energy associated with the formation of an interphase interface, therefore inhibiting the phase transformation. A critical diameter exists where the system transitions to bulk behavior, and a generalized equation was formulated that successfully predicted this transition in the Fe-Au system. This provided and explains a new route to novel structures not possible in bulk systems. The structural characterization was accomplished using transmission electron microscopy in collaboration with Matthew Kramer of Ames Laboratory. The PI and graduate student visited Ames Laboratory several times a year to conduct the experiments.

  16. Polyanalytic relativistic second Bargmann transforms

    E-Print Network [OSTI]

    Zouhair Mouayn

    2015-04-01T23:59:59.000Z

    We construct coherent states through special superpositions of photon number states of the relativistic isotonic oscillator. In each superposition the coefficients are chosen to be L 2 eingenfunctions of a sigma weight Maass Laplacian on the Poincare disk, which are associated with discrete eigenvalues. For each nonzero m the associated coherent states transform constitutes the m true polyanalytic extension of a relativistic version of the second Bargmann transform, whose integral kernel is expressed in terms of a special Appel Kampe de Feriet hypergeometric function. The obtained results could be used to extend the known semi classical analysis of quantum dynamics of the relativistic isotonic oscillator.

  17. Fourier transforms of UD integrals

    E-Print Network [OSTI]

    Igor Kondrashuk; Anatoly Kotikov

    2008-02-23T23:59:59.000Z

    UD integrals published by N. Usyukina and A. Davydychev in 1992-1993 are integrals corresponding to ladder-type Feynman diagrams. The results are UD functions $\\Phi^{(L)},$ where $L$ is the number of loops. They play an important role in N=4 supersymmetic Yang-Mills theory. The integrals were defined and calculated in the momentum space. In this paper the position space representation of UD functions is investigated. We show that Fourier transforms of UD functions are UD functions of space-time intervals but this correspondence is indirect. For example, the Fourier transform of the second UD integral is the second UD integral.

  18. Fission Product Ratios as Treaty Monitoring Discriminants

    SciTech Connect (OSTI)

    Miley, Harry S.; Bowyer, Ted W.; Greenwood, Lawrence R.; Arthur, Richard J.

    2008-05-15T23:59:59.000Z

    The International Monitoring System (IMS) of the Comprehensive Test Ban Treaty Organization (CTBTO) is currently under construction. The IMS is intended for monitoring of nuclear explosions. The radionuclide branch of the IMS monitors the atmosphere for short-lived radioisotopes indicative of a nuclear weapon test, and includes field collection and measurement stations, as well as laboratories to provide reanalysis of the most important samples and a quality control function. The Pacific Northwest National Laboratory in Richland, Washington hosts the United States IMS laboratory, with the designation “RL16.” Since acute reactor containment failures and chronic reactor leakage may also produce similar isotopes, it is tempting to compute ratios of detected isotopes to determine the relevance of an event to the treaty or agreement in question. In this paper we will note several shortcomings of simple isotopic ratios: (1) fractionation of different chemical species, (2) difficulty in comparing isotopes within a single element, (3) the effect of unknown decay times. While these shortcomings will be shown in the light of an aerosol sample, several of the problems extend to xenon isotopic ratios. The result of the difficulties listed above is that considerable human expertise will be required to convert a simple mathematical ratio into a criterion which will reliably categorize an event as ‘reactor’ or ‘weapon’.

  19. Viscosity to entropy ratio at extremality

    E-Print Network [OSTI]

    Sayan K. Chakrabarti; Sachin Jain; Sudipta Mukherji

    2010-01-19T23:59:59.000Z

    Assuming gauge theory realization at the boundary, we show that the viscosity to entropy ratio is 1/(4 pi) where the bulk is represented by a large class of extremal black holes in anti-de Sitter space. In particular, this class includes multiple R-charged black holes in various dimensions.

  20. Ratio method of measuring $w$ boson mass

    SciTech Connect (OSTI)

    Guo, Feng; /SUNY, Stony Brook

    2010-08-01T23:59:59.000Z

    This dissertation describes an alternative method of measuring the W boson mass in D0 experiment. Instead of extracting M{sub W} from the fitting of W {yields} e{nu} fast Monte Carlo simulations to W {yields} e{nu} data as in the standard method, we make the direct fit of transverse mass between W {yields} e{nu} data and Z {yields} ee data. One of the two electrons from Z boson is treated as a neutrino in the calculation of transverse mass. In ratio method, the best fitted scale factor corresponds to the ratio of W and Z boson mass (M{sub W}/M{sub Z}). Given the precisely measured Z boson mass, W mass is directly fitted from W {yields} e{nu} and Z {yields} ee data. This dissertation demonstrates that ratio method is a plausible method of measuring the W boson mass. With the 1 fb{sup -1} D0 Run IIa dataset, ratio method gives M{sub W} = 80435 {+-} 43(stat) {+-} 26(sys) MeV.

  1. Speech Enhancement of Spectral Magnitude Bin Trajectories using Gaussian Mixture-Model based Minimum Mean-Square Error Estimators

    E-Print Network [OSTI]

    Speech Enhancement of Spectral Magnitude Bin Trajectories using Gaussian Mixture-Model based mean-square error es- timators have been applied to speech enhancement in the tem- poral, transform (e estimator for 8 kHz telephone-quality speech. Index Terms: Speech enhancement, minimum mean-square er- ror

  2. Model Transformations? Transformation Models! Jean Bezivin (A) , Fabian Buttner (B) , Martin Gogolla (B) ,

    E-Print Network [OSTI]

    Gogolla, Martin - Fachbereich 3

    Model Transformations? Transformation Models! Jean Bezivin (A) , Fabian BË?uttner (B) , Martin of the current work on model transformations seems essentially operational and executable in nature. Executable, transformations can also be viewed as descriptive models by stating only the properties a transformation has

  3. ENGI 2422 Laplace Transforms Page 5-01 5.01 Transforms

    E-Print Network [OSTI]

    George, Glyn

    ENGI 2422 Laplace Transforms Page 5-01 5.01 Transforms In some situations, a difficult problem can be transformed into an easier problem, whose solution can be transformed back into the solution of the original problem. For example, an integrating factor can sometimes be found to transform a non-exact first order

  4. Nanowire growth by an electron beam induced massive phase transformation

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

    Sood, Shantanu; Kisslinger, Kim; Gouma, Perena

    2014-12-01T23:59:59.000Z

    Tungsten trioxide nanowires of a high aspect ratio have been synthesized in-situ in a TEM under an electron beam of current density 14A/cm˛ due to a massive polymorphic reaction. Sol-gel processed pseudocubic phase nanocrystals of tungsten trioxide were seen to rapidly transform to one dimensional monoclinic phase configurations, and this reaction was independent of the substrate on which the material was deposited. The mechanism of the self-catalyzed polymorphic transition and accompanying radical shape change is a typical characteristic of metastable to stable phase transformations in nanostructured polymorphic metal oxides. A heuristic model is used to confirm the metastable to stablemore »growth mechanism. The findings are important to the control electron beam deposition of nanowires for functional applications starting from colloidal precursors.« less

  5. Nanowire growth by an electron beam induced massive phase transformation

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

    Sood, Shantanu [State Univ., of New York, Stony Brook, NY (United States); Kisslinger, Kim [Brookhaven National Lab. (BNL), Upton, NY (United States); Gouma, Perena [State Univ., of New York, Stony Brook, NY (United States)

    2014-12-01T23:59:59.000Z

    Tungsten trioxide nanowires of a high aspect ratio have been synthesized in-situ in a TEM under an electron beam of current density 14A/cm˛ due to a massive polymorphic reaction. Sol-gel processed pseudocubic phase nanocrystals of tungsten trioxide were seen to rapidly transform to one dimensional monoclinic phase configurations, and this reaction was independent of the substrate on which the material was deposited. The mechanism of the self-catalyzed polymorphic transition and accompanying radical shape change is a typical characteristic of metastable to stable phase transformations in nanostructured polymorphic metal oxides. A heuristic model is used to confirm the metastable to stable growth mechanism. The findings are important to the control electron beam deposition of nanowires for functional applications starting from colloidal precursors.

  6. A high ON/OFF ratio organic film for photo- and electro-dual-mode recording

    SciTech Connect (OSTI)

    Li Heng [Department of Physics, Beijing University of Aeronautics and Astronautics, Beijing 100083 (China); Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solid, Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Wen Yongqiang; Li Gang; Ma Ying; Yang Lianming; Song Yanlin; Zhu Daoben [Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solid, Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Li Pengwei; Wang Rongming [Department of Physics, Beijing University of Aeronautics and Astronautics, Beijing 100083 (China); Yang Qinglin [School of Chemistry and Environment, Beijing University of Aeronautics and Astronautics, Beijing 100083 (China)

    2009-04-20T23:59:59.000Z

    To improve the stability of organic multifunctional materials and enhance the ON/OFF ratio, a donor-{pi}-acceptor molecule with the triphenylamine (TPA) unit is designed and synthesized. The TPA unit can effectively stabilize the charge transferred state, and the thin film shows excellent bistable electronic switching behavior with high ON/OFF current ratio of about 10{sup 5}. Meanwhile, reversible and stable nanometer-scale data storage is realized on the thin film by applying pulsed voltages, and optical information storage is achieved simultaneously by utilizing fluorescence changes under UV irradiation.

  7. Induced geometry from disformal transformation

    E-Print Network [OSTI]

    Fang-Fang Yuan; Peng Huang

    2015-02-08T23:59:59.000Z

    In this note, we use the disformal transformation to induce a geometry from the manifold which is originally Riemannian. The new geometry obtained here can be considered as a generalization of Weyl integrable geometry. Based on these results, we further propose a geometry which is naturally a generalization of Weyl geometry.

  8. Transformer Abdullah Al-Otaibi

    E-Print Network [OSTI]

    Masoudi, Husain M.

    : they are used for three-phase supplies. 3. Leakage transformers: also called a stray-field, there are used. By cooling type: air cooled, oil filled, fan cooled, or water cooled. 5. By application function: such as power supply, impedance matching, output voltage and current stabilizer, or circuit isolation. 6. By end

  9. PHASE TRANSFORMATIONSPHASE TRANSFORMATIONS Nucleation & Growth

    E-Print Network [OSTI]

    Subramaniam, Anandh

    ;Energies involved Bulk Gibbs free energy Interfacial energy Strain energy Important in solid to solid at constant T & P), (ii) increase in (interface free-energy), (iii) increase in strain energy. In a liquid). Volume of transformed material New interface created #12;Energies involved Bulk Gibbs free energy

  10. Some Special Fourier Transform Pairs

    E-Print Network [OSTI]

    Vickers, James

    Some Special Fourier Transform Pairs 24.3 Introduction ' & $ % Prerequisites Before starting to . . . #12;1. Parseval's Theorem Recall from Unit 2 on Fourier Series that for a periodic signal fT (t) with complex Fourier coefficients cn(n = 0, ±1, ±2, . . .) Parseval's Theorem holds: 1 T + T 2 - T 2 f2 T (t

  11. Vehicle Technologies Office Merit Review 2014: High Compression Ratio Turbo Gasoline Engine Operation Using Alcohol Enhancement

    Broader source: Energy.gov [DOE]

    Presentation given by Massachusetts Institute of Technology at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high...

  12. Scalable enhancement of graphene oxide properties by thermally driven phase

    E-Print Network [OSTI]

    Wu, Junqiao

    Scalable enhancement of graphene oxide properties by thermally driven phase transformation Priyank,2,4 * and Jeffrey C. Grossman1 * Chemical functionalization of graphene is promising for a variety of next-generation technologies. Although graphene oxide (GO) is a versatile material in this direction, its use is limited

  13. 3.4 Wavelet Denoising for Image Enhancement SBC Laboratories

    E-Print Network [OSTI]

    Rajashekar, Umesh

    3.4 Wavelet Denoising for Image Enhancement Dong Wei SBC Laboratories Austin, TX 78759 Umesh. Recently, wavelet-based denoising techniques have been recognized as powerful tools for denois- ing. Different from those filtering-based classical methods, wavelet-based methods can be viewed as transform

  14. Blowing Ratio Effects on Film Cooling Effectiveness

    E-Print Network [OSTI]

    Liu, Kuo-Chun

    2010-01-14T23:59:59.000Z

    cooling Rib turbulators Shaped internal cooling passage Trailing edge ejection Cooling air 3 Among the variety of film cooling hole designs, compound angle and shaped holes are generally considered in modern high pressure and high temperature gas turbine... ratio of 1.85. As compared to cylindrical hole, both shaped holes showed significant improved thermal protection of the surface downstream of the ejection location. Yu et al. [7] studied film cooling effectiveness and heat transfer distributions on a...

  15. aspect ratio wings: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  16. aspect ratios numerical: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  17. aspect ratio microstructuring: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  18. aspect ratio: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  19. average aspect ratios: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  20. aspect ratio tori: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  1. aspect ratio ion: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  2. aspect ratio su-8: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  3. aspect ratio micro: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  4. aspect ratio domains: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  5. aspect ratio electrodes: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  6. aspect ratio plasmas: Topics by E-print Network

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

    efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern Texas A&M University - TxSpace Summary: ratios on five-spot and...

  7. Effect of humic constituents on the transformation of chlorinated phenols and anilines in the presence of oxidoreductive enzymes or birnessite

    SciTech Connect (OSTI)

    Park, J.W.; Dec, J.; Bollag, J.M. (Pennsylvania State Univ., University Park, PA (United States)); Kim, J.E. (Kyngpook National Univ., Taegu (Korea, Republic of). Dept. of Agricultural Chemistry)

    1999-06-15T23:59:59.000Z

    Chlorinated phenols and anilines are transformed and detoxified in soil through oxidative coupling reactions mediated by enzymes or metal oxides. The reactions may be influences by humic constituents, such as syringaldehyde or catechol, that originate from lignin decomposition and are also subject to oxidative coupling. In this study, the effect of humic constituents on xenobiotic transformation was evaluated in vitro based on the determination of unreacted chlorophenols and chloroanilines. In experiments with peroxidase, laccase, and birnessite, the transformation of most chlorophenols was considerably enhanced by the addition of syringaldehyde. Less enhancement was observed using 4-hydroxybenzoic acid, and the addition of catechol resulted in a reduction of most transformations. The opposite was observed in experiments with tyrosinase, in which case catechol caused considerable enhancement of chlorophenol transformation. The varying effect of catechol can be explained by different transformation mechanisms involving either o-quinone coupling or free radical coupling. Regardless of the agent used to mediate the reactions, chloroanilines seemed to undergo nucleophilic addition to quinone oligomers, which resulted from coupling of the humic constituents. Catechol, which readily forms quinones and quinone oligomers, was most efficient in enhancing these reactions.

  8. IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING 1 Sparse matrix transform

    E-Print Network [OSTI]

    covariance estimator ­ the sparse matrix transform (SMT), a shrinkage-enhanced SMT, and a graph-constrained SMT ­ in the context of several of these problems. In addition to two more generic measures of quality of data for which SMT is well or poorly suited. The SMT is based on the product of K pairwise coordinate

  9. Proposed Giaever transformer to probe the pseudogap phase of cuprates.

    SciTech Connect (OSTI)

    Levchenko, A.; Norman, M. R. (Materials Science Division)

    2011-03-01T23:59:59.000Z

    We develop a theory of the rectification effect in a double-layer system where both layers are superconductors or one of the layers is a normal metal. The Coulomb interaction is assumed to provide the dominant coupling between the layers. We find that superconducting fluctuations strongly enhance the drag conductivity, with rectification most pronounced when both layers are superconductors. In view of their distinct dependence on temperature near T{sub c} and layer separation, drag measurements based on a Giaever transformer could distinguish whether rectification occurs due to fluctuating pairs or inductively coupled fluctuating vortices.

  10. air-fuel ratio: Topics by E-print Network

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

    was performed to investigate the effects of air-fuel ratio, inlet boost pressure, hydrogen rich fuel reformate, and compression ratio on engine knock behavior. For each...

  11. Nonlinear transform coding with lossless polar coordinates

    E-Print Network [OSTI]

    Ba, Demba Elimane

    2006-01-01T23:59:59.000Z

    In conventional transform coding, the importance of preserving desirable quantization partition cell shapes prevents one from considering the use of a nonlinear change of variables. If no linear transformation of a given ...

  12. Transforms for prediction residuals in video coding

    E-Print Network [OSTI]

    Kam??l?, Fatih

    2010-01-01T23:59:59.000Z

    Typically the same transform, the 2-D Discrete Cosine Transform (DCT), is used to compress both image intensities in image coding and prediction residuals in video coding. Major prediction residuals include the motion ...

  13. Harmonic Wavelet Transform and Image Approximation

    E-Print Network [OSTI]

    Zhang, Zhihua; Saito, Naoki

    2010-01-01T23:59:59.000Z

    DOI 10.1007/s10851-010-0202-x Harmonic Wavelet Transform andwe approximate f by a harmonic function u such that thebanks. We call this the Harmonic Wavelet Transform (HWT).

  14. Tunable fractional-order Fourier transformer

    SciTech Connect (OSTI)

    Malyutin, A A [A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

    2006-01-31T23:59:59.000Z

    A fractional two-dimensional Fourier transformer whose orders are tuned by means of optical quadrupoles is described. It is shown that in the optical scheme considered, the Fourier-transform order a element of [0,1] in one of the mutually orthogonal planes corresponds to the transform order (2-a) in another plane, i.e., to inversion and inverse Fourier transform of the order a. (laser modes and beams)

  15. Implications of Fast Reactor Transuranic Conversion Ratio

    SciTech Connect (OSTI)

    Steven J. Piet; Edward A. Hoffman; Samuel E. Bays

    2010-11-01T23:59:59.000Z

    Theoretically, the transuranic conversion ratio (CR), i.e. the transuranic production divided by transuranic destruction, in a fast reactor can range from near zero to about 1.9, which is the average neutron yield from Pu239 minus 1. In practice, the possible range will be somewhat less. We have studied the implications of transuranic conversion ratio of 0.0 to 1.7 using the fresh and discharge fuel compositions calculated elsewhere. The corresponding fissile breeding ratio ranges from 0.2 to 1.6. The cases below CR=1 (“burners”) do not have blankets; the cases above CR=1 (“breeders”) have breeding blankets. The burnup was allowed to float while holding the maximum fluence to the cladding constant. We graph the fuel burnup and composition change. As a function of transuranic conversion ratio, we calculate and graph the heat, gamma, and neutron emission of fresh fuel; whether the material is “attractive” for direct weapon use using published criteria; the uranium utilization and rate of consumption of natural uranium; and the long-term radiotoxicity after fuel discharge. For context, other cases and analyses are included, primarily once-through light water reactor (LWR) uranium oxide fuel at 51 MWth-day/kg-iHM burnup (UOX-51). For CR<1, the heat, gamma, and neutron emission increase as material is recycled. The uranium utilization is at or below 1%, just as it is in thermal reactors as both types of reactors require continuing fissile support. For CR>1, heat, gamma, and neutron emission decrease with recycling. The uranium utilization exceeds 1%, especially as all the transuranic elements are recycled. exceeds 1%, especially as all the transuranic elements are recycled. At the system equilibrium, heat and gamma vary by somewhat over an order of magnitude as a function of CR. Isotopes that dominate heat and gamma emission are scattered throughout the actinide chain, so the modest impact of CR is unsurprising. Neutron emitters are preferentially found among the higher actinides, so the neutron emission varies much stronger with CR, about three orders of magnitude.

  16. High aspect ratio, remote controlled pumping assembly

    DOE Patents [OSTI]

    Brown, Steve B. (Livermore, CA); Milanovich, Fred P. (Lafayette, CA)

    1995-01-01T23:59:59.000Z

    A miniature dual syringe-type pump assembly which has a high aspect ratio and which is remotely controlled, for use such as in a small diameter penetrometer cone or well packer used in water contamination applications. The pump assembly may be used to supply and remove a reagent to a water contamination sensor, for example, and includes a motor, gearhead and motor encoder assembly for turning a drive screw for an actuator which provides pushing on one syringe and pulling on the other syringe for injecting new reagent and withdrawing used reagent from an associated sensor.

  17. Energy Balance Bowen Ratio Station (EBBR) Handbook

    SciTech Connect (OSTI)

    Cook, DR

    2011-02-23T23:59:59.000Z

    The energy balance Bowen ratio (EBBR) system produces 30-minute estimates of the vertical fluxes of sensible and latent heat at the local surface. Flux estimates are calculated from observations of net radiation, soil surface heat flux, and the vertical gradients of temperature and relative humidity (RH). Meteorological data collected by the EBBR are used to calculate bulk aerodynamic fluxes, which are used in the Bulk Aerodynamic Technique (BA) EBBR value-added product (VAP) to replace sunrise and sunset spikes in the flux data. A unique aspect of the system is the automatic exchange mechanism (AEM), which helps to reduce errors from instrument offset drift.

  18. Meteorological Effects on Air/Fuel Ratio

    E-Print Network [OSTI]

    Ferri, J. L.

    1984-01-01T23:59:59.000Z

    ) where subscript 1 indicates at condition 1 and subsc 1pt 2 Indicates at condition 2. Solving for E gives 2 100. (E . 13) Example 1 A furnace with a pressure type ratio control sys~em is calibrated at 10% excess air with 30 of air. If the air... of ... 30 of ... 460? 590 oR Substituting in Equation 13 and solving for E gives 2 E = (100 ... 10) (:;~)II, - 100 = 3.3% excess ir. 2 If the furnace had been calibrated to 10% excess air with iOO of air, the % excess air with 30 of air would bJI 590 II...

  19. High aspect ratio, remote controlled pumping assembly

    DOE Patents [OSTI]

    Brown, S.B.; Milanovich, F.P.

    1995-11-14T23:59:59.000Z

    A miniature dual syringe-type pump assembly is described which has a high aspect ratio and which is remotely controlled, for use such as in a small diameter penetrometer cone or well packer used in water contamination applications. The pump assembly may be used to supply and remove a reagent to a water contamination sensor, for example, and includes a motor, gearhead and motor encoder assembly for turning a drive screw for an actuator which provides pushing on one syringe and pulling on the other syringe for injecting new reagent and withdrawing used reagent from an associated sensor. 4 figs.

  20. The TRANSFORMATION OF CONFLICTS AMONG ETHIOPIAN PASTORALISTS

    E-Print Network [OSTI]

    Richner, Heinz

    The TRANSFORMATION OF CONFLICTS AMONG ETHIOPIAN PASTORALISTS: Ethnography of the Notion of Conflict This PhD thesis is concerned with studying the conceptualization, performance and transformation in their nature and have not yet achieved full transformation to peace. The research supports the notion

  1. Ribaucour transformations revisited Armando V. Corro

    E-Print Network [OSTI]

    Tenenblat, Keti

    Ribaucour transformations revisited Armando V. Corro Keti Tenenblat Abstract We present a revised definition of a Ribaucour transformation for submanifolds of space forms, with flat normal bundle, motivated- cise treatment of the geometric aspect of such transformations preserving lines of curvature and it can

  2. YANGMILLS THEORY AND THE SEGALBARGMANN TRANSFORM

    E-Print Network [OSTI]

    YANG­MILLS THEORY AND THE SEGAL­BARGMANN TRANSFORM BRIAN C. HALL Abstract. Motivated by the results cylinder, with the goal of obtaining an appropriate Segal­Bargmann transform. Using a Gaussian mea­ sure a variant of the classical Segal­Bargmann transform. A simple but non­rigorous argument shows

  3. LAPPED TRANSFORMS Ricardo L. de Queiroz

    E-Print Network [OSTI]

    de Queiroz, Ricardo L.

    LAPPED TRANSFORMS Ricardo L. de Queiroz Advanced Color Imaging Xerox Corporation queiroz@wrc.xerox.com 0.1 Introduction The idea of a lapped transform (LT, for short) maintaining orthogonality and non with the blocking artifacts so common in traditional block transform coding of images. The idea was to extend

  4. Transforming and Refining Abstract Constraint Specifications

    E-Print Network [OSTI]

    Walsh, Toby

    Transforming and Refining Abstract Constraint Specifications Alan M. Frisch1 , Brahim Hnich2 , Ian choose model transformations to reduce greatly the amount of effort that is required to solve a problem by systematic search. It is a consid- erable challenge to automate such transformations. A problem may be viewed

  5. AALBORGUNIVERSITY DEPARTMENTOFENERGY TECHNOLOGY Transformer in series

    E-Print Network [OSTI]

    Silva, Filipe Faria Da

    AALBORGUNIVERSITY­ DEPARTMENTOFENERGY TECHNOLOGY Transformer in series Filipe Miguel Faria Da that corresponds to a neighbour transformer. Both loads are 3-phase loads, which can be unbalanced to generated. The harmonics are generated inside the farm, thus, the current source is grounded at the transformer's neutral

  6. Simulation of Top Oil Temperature for Transformers

    E-Print Network [OSTI]

    Simulation of Top Oil Temperature for Transformers Masters Thesis and Final Project Report Power-Oil Temperature for Transformers Thesis and Final Report Yong Liang PSERC Publication 01-21 February 2001 #12 for the PSERC project "On-Line Peak Loading of Substation Distribution Transformers Through Accurate Temperature

  7. Interpolating Wavelet Transforms David L. Donoho

    E-Print Network [OSTI]

    Donoho, David

    Interpolating Wavelet Transforms David L. Donoho Department of Statistics Stanford University October, 1992 Abstract We describe several \\wavelet transforms" which characterize smoothness spaces-interpret the empirical wavelet transform, i.e. the common practice of applying pyramid #12;lters to samples of a function

  8. RECENTER -ADVERSITY INTO TRANSFORMATION Course Description

    E-Print Network [OSTI]

    Coles, William A.

    Center" delivers power tools and real time strategies for creating performance transformation ­ no matter what and practical system for transforming your communication skills from the inside and outside. · Use real timeRECENTER - ADVERSITY INTO TRANSFORMATION Course Description: Knowing how to use adversity

  9. Quantum arithmetic with the Quantum Fourier Transform

    E-Print Network [OSTI]

    Lidia Ruiz-Perez; Juan Carlos Garcia-Escartin

    2014-11-21T23:59:59.000Z

    The Quantum Fourier Transform offers an interesting way to perform arithmetic operations on a quantum computer. We review existing Quantum Fourier Transform adders and multipliers and propose some modifications that extend their capabilities. Among the new circuits, we propose a quantum method to compute the weighted average of a series of inputs in the transform domain.

  10. Birefringent Fourier-transform imaging spectrometer

    E-Print Network [OSTI]

    Harvey, Andy

    Birefringent Fourier-transform imaging spectrometer Andrew Robert Harvey and David William Fletcher.r.Harvey@hw.ac.uk http://www.ece.eps.hw.ac.uk/~arharvey Abstract: Fourier-transform imaging spectrometers offer important, for application in harsh environments, deployment of Fourier-transform instruments based on traditional moving

  11. The Fourier Transform -A Primer Hagit Shatkay

    E-Print Network [OSTI]

    Learned, John

    The Fourier Transform - A Primer Hagit Shatkay Department of Computer Science Brown University Providence, Rhode Island 02912 CS-95-37 November 1995 #12;#12;The Fourier Transform { A Primer Hagit Shatkay Department of Computer Science Brown University Providence, RI 02912 1 Introduction The Fourier transform

  12. Lecture 2: Fourier transforms and frequency response

    E-Print Network [OSTI]

    Fan, Xingzhe

    Lecture 2: Fourier transforms and frequency response Course at a glance Discrete-time signals and systems Fourier-domain representation DFT/FFT System structures Filter structures Filter design Filter z-transform Sampling and reconstruction System analysis System Fourier transforms and frequency response Frequency

  13. Fourier transform channeled spectropolarimetry in the MWIR

    E-Print Network [OSTI]

    Dereniak, Eustace L.

    Fourier transform channeled spectropolarimetry in the MWIR Michael W. Kudenov,1 Nathan A. Hagen, 1 Abstract: A complete Fourier Transform Spectropolarimeter in the MWIR is demonstrated. The channeled and links 1. P. Griffiths and J. D. Haseth, "Fourier Transform Infrared Spectrometry," (John Wiley & Sons

  14. A programmable Fresnel transform pulse shaper

    E-Print Network [OSTI]

    Purdue University

    A programmable Fresnel transform pulse shaper G. M´inguez-Vega1, J.D. McKinney2 and A.M. Weiner2 1@purdue.edu Abstract: We demonstrate the first reprogrammable Fresnel transform pulse shaper based on a modified direct a free-space Fresnel transform which causes quadratic dispersion of the output temporal waveform. When

  15. On Lorentz Transformations in Symplectic Deformations

    SciTech Connect (OSTI)

    Cuesta, R.; Sabido, M. [Departamento de Fisica, DCI-Campus Leon, Universidad de Guanajuato, A.P. E-143, C.P. 37150, Guanajuato (Mexico); Guzman, W. [Instituto de Fisica, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, 21945-970, Rio de Janeiro (Brazil)

    2010-07-12T23:59:59.000Z

    In this paper we study noncommutative Lorentz transformations using symplectic deformations. In this framework we define an infinitesimal line element that is invariant under this noncommutative Lorentz transformations. Using the symplectic geometry formalism, we find that noncommutative Lorentz transformations intertwine the canonical momentums with canonical position coordinates.

  16. A Superconducting transformer system for high current cable testing

    E-Print Network [OSTI]

    Godeke, A.

    2010-01-01T23:59:59.000Z

    A Superconducting Transformer System for High Current CableDC) superconducting transformer system for the high currentsuperconducting cables. The transformer consists of a core-

  17. active transforming growth: Topics by E-print Network

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

    Solid State Transformer Engineering Websites Summary: converters as distribution transformers 1. A power electronics-based solid state transformer (SST) providesAc-Ac Dual...

  18. A Superconducting transformer system for high current cable testing

    E-Print Network [OSTI]

    Godeke, A.

    2010-01-01T23:59:59.000Z

    A Superconducting Transformer System for High Current Cablea Direct-Current (DC) superconducting transformer system forhigh current test of superconducting cables. The transformer

  19. Towards Sustainable Communities: Transitions and Transformations in Environmental Policy

    E-Print Network [OSTI]

    Ghosh, Kaustuv

    2010-01-01T23:59:59.000Z

    Transformations in Environmental Policy Daniel A. MazmanianTransformations in Environmental Policy (2 ed). Cambridge,Transformation in Environmental Policy is the second edition

  20. Ratios of heavy hadron semileptonic decay rates

    E-Print Network [OSTI]

    Michael Gronau; Jonathan L. Rosner

    2010-12-27T23:59:59.000Z

    Ratios of charmed meson and baryon semileptonic decay rates appear to be satisfactorily described by considering only the lowest-lying (S-wave) hadronic final states and assuming the kinematic factor describing phase space suppression is the same as that for free quarks. For example, the rate for $D_s$ semileptonic decay is known to be $(17.0 \\pm 5.3)%$ lower than those for $D^0$ or $D^+$, and the model accounts for this difference. When applied to hadrons containing $b$ quarks, this method implies that the $B_s$ semileptonic decay rate is about 1% higher than that of the nonstrange $B$ mesons. This small difference thus suggests surprisingly good local quark-hadron duality for $B$ semileptonic decays, complementing the expectation based on inclusive quark-hadron duality that these differences in rates should not exceed a few tenths of a percent. For $\\Lambda_b$ semileptonic decay, however, the inclusive rate is predicted to be about 13% greater than that of the nonstrange $B$ mesons. This value, representing a considerable departure from a calculation using a heavy quark expansion, is close to the corresponding experimental ratio $\\Gamma(\\Lambda_b)/ \\bar \\Gamma(B) = 1.13 \\pm 0.03$ of total decay rates.

  1. Hydraulic system for a ratio change transmission

    DOE Patents [OSTI]

    Kalns, Ilmars (Northville, MI)

    1981-01-01T23:59:59.000Z

    Disclosed is a drive assembly (10) for an electrically powered vehicle (12). The assembly includes a transaxle (16) having a two-speed transmission (40) and a drive axle differential (46) disposed in a unitary housing assembly (38), an oil-cooled prime mover or electric motor (14) for driving the transmission input shaft (42), an adapter assembly (24) for supporting the prime mover on the transaxle housing assembly, and a hydraulic system (172) providing pressurized oil flow for cooling and lubricating the electric motor and transaxle and for operating a clutch (84) and a brake (86) in the transmission to shift between the two-speed ratios of the transmission. The adapter assembly allows the prime mover to be supported in several positions on the transaxle housing. The brake is spring-applied and locks the transmission in its low-speed ratio should the hydraulic system fail. The hydraulic system pump is driven by an electric motor (212) independent of the prime mover and transaxle.

  2. Cauchy transforms of measures viewed as some functionals of Fourier transforms #

    E-Print Network [OSTI]

    Jurek, Zbigniew J.

    Cauchy transforms of measures viewed as some functionals of Fourier transforms # Zbigniew J. Jurek Urbanik ABSTRACT. The Cauchy transform of a positive measure plays an impor­ tant role in complex analysis and more recently in so­called free probability. We show here that the Cauchy transform restricted

  3. Cauchy transforms of measures viewed as some functionals of Fourier transforms

    E-Print Network [OSTI]

    Jurek, Zbigniew J.

    Cauchy transforms of measures viewed as some functionals of Fourier transforms Zbigniew J. Jurek Urbanik ABSTRACT. The Cauchy transform of a positive measure plays an impor- tant role in complex analysis and more recently in so-called free probability. We show here that the Cauchy transform restricted

  4. Learning transformation rules from transformation examples: An approach based on Relational Concept Analysis

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Learning transformation rules from transformation examples: An approach based on Relational Concept), model transformations are basic and primordial entities, thus easing their design and implementation is an important issue. A quite recently proposed way to create model transformations consists in deducing

  5. RTU Comparison Calculator Enhancement Plan

    SciTech Connect (OSTI)

    Miller, James D.; Wang, Weimin; Katipamula, Srinivas

    2014-03-31T23:59:59.000Z

    Over the past two years, Department of Energy’s Building Technologies Office (BTO) has been investigating ways to increase the operating efficiency of the packaged rooftop units (RTUs) in the field. First, by issuing a challenge to the RTU manufactures to increase the integrated energy efficiency ratio (IEER) by 60% over the existing ASHRAE 90.1-2010 standard. Second, by evaluating the performance of an advanced RTU controller that reduces the energy consumption by over 40%. BTO has previously also funded development of a RTU comparison calculator (RTUCC). RTUCC is a web-based tool that provides the user a way to compare energy and cost savings for two units with different efficiencies. However, the RTUCC currently cannot compare savings associated with either the RTU Challenge unit or the advanced RTU controls retrofit. Therefore, BTO has asked PNNL to enhance the tool so building owners can compare energy and savings associated with this new class of products. This document provides the details of the enhancements that are required to support estimating energy savings from use of RTU challenge units or advanced controls on existing RTUs.

  6. Computing Instantaneous Frequency by normalizing Hilbert Transform

    DOE Patents [OSTI]

    Huang, Norden E.

    2005-05-31T23:59:59.000Z

    This invention presents Normalized Amplitude Hilbert Transform (NAHT) and Normalized Hilbert Transform(NHT), both of which are new methods for computing Instantaneous Frequency. This method is designed specifically to circumvent the limitation set by the Bedorsian and Nuttal Theorems, and to provide a sharp local measure of error when the quadrature and the Hilbert Transform do not agree. Motivation for this method is that straightforward application of the Hilbert Transform followed by taking the derivative of the phase-angle as the Instantaneous Frequency (IF) leads to a common mistake made up to this date. In order to make the Hilbert Transform method work, the data has to obey certain restrictions.

  7. Credit Enhancement Program (Oklahoma)

    Broader source: Energy.gov [DOE]

    The Credit Enhancement Program is a means by which the Oklahoma Finance Authority provides guarantees for small companies, manufacturing facilities and communities in need of funds for expansion...

  8. Plasmon Enhanced Photoemission

    E-Print Network [OSTI]

    Polyakov, Aleksandr

    2013-01-01T23:59:59.000Z

    160 µm diameter. Such ultra-short laser pulse has a finiteprovided by the ultra-short laser pulses, a plasmon enhanced

  9. Plasmon Enhanced Photoemission

    E-Print Network [OSTI]

    Polyakov, Aleksandr N.

    2012-01-01T23:59:59.000Z

    160 µm diameter. Such ultra-short laser pulse has a finiteprovided by the ultra-short laser pulses, a plasmon enhanced

  10. Preventive overhaul time for power transformers

    SciTech Connect (OSTI)

    Sarmadi, M. [Pennsylvania State Univ., University Park, PA (United States). Electrical Engineering Dept.; Rouhi, J. [Univ. of Mazandaran (Iran, Islamic Republic of); Fayyaz, A. [Mazandaran Power Co. (Iran, Islamic Republic of)

    1999-11-01T23:59:59.000Z

    Power transformers are the major piece of equipment in high-voltage substations. A considerable number of these transformers exist in Iran`s integrated network. Due to the climate diversity and improper usage, many of these transformers age rapidly, suffer failure and are taken out of service before half their useful life. At the present time the utility companies have no specific time-frame and plan for preventive overhaul. Detection of preventive overhaul time will increase the remaining life of transformers and improve the reliability of substations. An exact check of the remaining lifetime of transformers is not yet possible by available diagnostic techniques. In this paper, the authors present a method of identifying the right time for preventive overhaul in 63 kV power transformers. This method is developed based on 25 year transformer performance records in Northern Iran (subtropical climate) and with the utilization of studies done by electrical engineering communities world-wide.

  11. High flux solar energy transformation

    DOE Patents [OSTI]

    Winston, Roland (Chicago, IL); Gleckman, Philip L. (Chicago, IL); O'Gallagher, Joseph J. (Flossmoor, IL)

    1991-04-09T23:59:59.000Z

    Disclosed are multi-stage systems for high flux transformation of solar energy allowing for uniform solar intensification by a factor of 60,000 suns or more. Preferred systems employ a focusing mirror as a primary concentrative device and a non-imaging concentrator as a secondary concentrative device with concentrative capacities of primary and secondary stages selected to provide for net solar flux intensification of greater than 2000 over 95 percent of the concentration area. Systems of the invention are readily applied as energy sources for laser pumping and in other photothermal energy utilization processes.

  12. High flux solar energy transformation

    DOE Patents [OSTI]

    Winston, R.; Gleckman, P.L.; O'Gallagher, J.J.

    1991-04-09T23:59:59.000Z

    Disclosed are multi-stage systems for high flux transformation of solar energy allowing for uniform solar intensification by a factor of 60,000 suns or more. Preferred systems employ a focusing mirror as a primary concentrative device and a non-imaging concentrator as a secondary concentrative device with concentrative capacities of primary and secondary stages selected to provide for net solar flux intensification of greater than 2000 over 95 percent of the concentration area. Systems of the invention are readily applied as energy sources for laser pumping and in other photothermal energy utilization processes. 7 figures.

  13. Fourier Transform Quantum State Tomography

    E-Print Network [OSTI]

    Mohammadreza Mohammadi; Agata M. Branczyk; Daniel F. V. James

    2013-01-17T23:59:59.000Z

    We propose a technique for performing quantum state tomography of photonic polarization-encoded multi-qubit states. Our method uses a single rotating wave plate, a polarizing beam splitter and two photon-counting detectors per photon mode. As the wave plate rotates, the photon counters measure a pseudo-continuous signal which is then Fourier transformed. The density matrix of the state is reconstructed using the relationship between the Fourier coefficients of the signal and the Stokes' parameters that represent the state. The experimental complexity, i.e. different wave plate rotation frequencies, scales linearly with the number of qubits.

  14. Ultrafast Transformations in Superionic Nanocrystals

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengthening aTurbulence may bedieselsummerFactTransformations in Superionic

  15. Transforming Epidemiology for 21st Century Medicine and Public Health

    SciTech Connect (OSTI)

    Khoury, Muin J [National Institutes of Health; Lam, Tram Kim [National Institutes of Health; Ioannidis, John [Stanford University; Hartge, Patricia [National Institutes of Health; Spitz, Margaret R. [Baylor College of Medicine, Huston; Buring, Julie E. [Brigham and Women's Hospital; Chanock, Stephen J. [National Institutes of Health; Tourassi, Georgia [ORNL; Zauber, Ann [Memorial Sloan-Kettering Cancer Center; Schully, Sheri D [National Institutes of Health

    2013-01-01T23:59:59.000Z

    n 2012, the National Cancer Institute (NCI) engaged the scientific community to provide a vision for cancer epidemiology in the 21st century. Eight overarching thematic recommendations, with proposed corresponding actions for consideration by funding agencies, professional societies, and the research community emerged from the collective intellectual discourse. The themes are (i) extending the reach of epidemiology beyond discovery and etiologic research to include multilevel analysis, intervention evaluation, implementation, and outcomes research; (ii) transforming the practice of epidemiology by moving toward more access and sharing of protocols, data, metadata, and specimens to foster collaboration, to ensure reproducibility and replication, and accelerate translation; (iii) expanding cohort studies to collect exposure, clinical, and other information across the life course and examining multiple health-related endpoints; (iv) developing and validating reliable methods and technologies to quantify exposures and outcomes on a massive scale, and to assess concomitantly the role of multiple factors in complex diseases; (v) integrating big data science into the practice of epidemiology; (vi) expanding knowledge integration to drive research, policy, and practice; (vii) transforming training of 21st century epidemiologists to address interdisciplinary and translational research; and (viii) optimizing the use of resources and infrastructure for epidemiologic studies. These recommendations can transform cancer epidemiology and the field of epidemiology, in general, by enhancing transparency, interdisciplinary collaboration, and strategic applications of new technologies. They should lay a strong scientific foundation for accelerated translation of scientific discoveries into individual and population health benefits.

  16. A Transformational View of Cartography W. R. Tobler

    E-Print Network [OSTI]

    Clarke, Keith

    A Transformational View of Cartography W. R. Tobler ABSTRACT. Cartographic transformations aliases are between points, lines, and areas. Substantive transformations occur in map interpolation transformational grammars, as originally devised for linguistics.2, 4 A similar, though less ambitious, attempt

  17. Transformation induced plasticity assisted steels: stress or strain affected martensitic

    E-Print Network [OSTI]

    Cambridge, University of

    Transformation induced plasticity assisted steels: stress or strain affected martensitic transformation? S. Chatterjee and H. K. D. H. Bhadeshia* Transformation induced plasticity (TRIP) assisted steels contain a small quantity of carbon enriched retained austenite, which transforms into martensite during

  18. LOCAL FOURIER TRANSFORMS AND RIGIDITY FOR D-MODULES

    E-Print Network [OSTI]

    Bloch, Spencer

    LOCAL FOURIER TRANSFORMS AND RIGIDITY FOR D. Local Fourier transforms, analogous to the `-adic local Fourier transforms [14], are constructed infinitesimal rigidity condition is satisfied. As in [12], the argument uses local Fourier transforms

  19. Uranium transformations in static microcosms.

    SciTech Connect (OSTI)

    Kelly, S. D.; Wu, W.; Yang, F.; Criddle, C.; Marsh, T. L.; O'Loughlin, E. J.; Ravel, B.; Watson, D.; Jardine, P. M.; Kemner, K. M.; Stanford Univ.; Michigan State Univ.; ORNL; BNL; EXAFS Analysis

    2010-01-01T23:59:59.000Z

    Elucidation of complex biogeochemical processes and their effects on speciation of U in the subsurface is critical for developing remediation strategies with an understanding of stability. We have developed static microcosms that are similar to bioreduction process studies in situ under laminar flow conditions or in sediment pores. Uranium L{sub 3}-edge X-ray absorption near-edge spectroscopy analysis with depth in the microcosms indicated that transformation of U{sup VI} to U{sup IV} occurred by at least two distinct processes. Extended X-ray absorption fine structure (EXAFS) analysis indicated that initial U{sup VI} species associated with C- and P-containing ligands were transformed to U{sup IV} in the form of uraninite and U associated with Fe-bound ligands. Microbial community analysis identified putative Fe{sup III} and sulfate reducers at two different depths in the microcosms. The slow reduction of U{sup VI} to U{sup IV} may contribute the stability of U{sup IV} within microcosms at 11 months after a decrease in bioreducing conditions due to limited electron donors.

  20. 126 IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING, VOL. 7, NO. 2, MARCH 1999 Single Channel Speech Enhancement Based on

    E-Print Network [OSTI]

    Allen, Jont

    Speech Enhancement Based on Masking Properties of the Human Auditory System Nathalie Virag Abstract--This paper addresses the problem of single channel speech enhancement at very low signal-to-noise ratios (SNR as subjective listening tests, confirm that the enhanced speech is more pleasant to a human listener. Finally

  1. The Mineralogic Transformation of Ferrihydrite Induced by Heterogeneou...

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

    Transformation of Ferrihydrite Induced by Heterogeneous Reaction with Bioreduced Anthraquinone Disulfonate (AQDS The Mineralogic Transformation of Ferrihydrite Induced by...

  2. NEMA Distribution Transformers, CCE Overview and Update presentation...

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

    Distribution Transformers, CCE Overview and Update presentation, dated 05242011 NEMA Distribution Transformers, CCE Overview and Update presentation, dated 05242011 This...

  3. NoVaS Transformations: Flexible Inference for Volatility Forecasting

    E-Print Network [OSTI]

    Politis, Dimitris N; Thomakos, Dimitrios D

    2008-01-01T23:59:59.000Z

    NoVaS Transformations: Flexible Inference for VolatilityNoVaS Transformations: Flexible Inference for Volatility

  4. 918 IEEE TRANSACTIONS ON AUDIO, SPEECH, AND LANGUAGE PROCESSING, VOL. 15, NO. 3, MARCH 2007 MAP Estimators for Speech Enhancement Under

    E-Print Network [OSTI]

    Estimators for Speech Enhancement Under Normal and Rayleigh Inverse Gaussian Distributions Richard C for speech enhancement in the discrete Fourier transform (DFT) domain, where we consider a multidimensional) distribution, speech enhancement. I. INTRODUCTION THE recent increased use of mobile speech processing ap

  5. p/pi Ratio in Di-Hadron Correlations

    E-Print Network [OSTI]

    Misha Veldhoen; for the ALICE Collaboration

    2012-10-08T23:59:59.000Z

    Particle ratios are important observables used to constrain models of particle production in heavy-ion collisions. In this work we report on a measurement of the p/pi ratio in the transverse momentum range 2.0 p_{T,assoc} p_{T,trig} p/pi ratio in the bulk region is compatible with the p/pi ratio of an inclusive measurement, and is much larger than the p/pi ratio in the jet peak. The p/pi ratio in the jet peak is compatible with a PYTHIA reference, in which fragmentation in the vacuum is the dominant mechanism of particle production.

  6. COMPARISON BETWEEN IHS-RGB TRANSFORMATIONS AND RATIO BANDS METHODS FROM LANDSAT IMAGERY IN THE RIO DE

    E-Print Network [OSTI]

    Boyer, Edmond

    : The use of images by orbital remote sensing has shown great utility in environmental geology; Environmental Geology. 1. INTRODUCTION In recent years there has been a growing demand for environmental geotechnological information applied to geology, geotechnics and other related areas, especially where

  7. The Fourier Transform on Quantum Euclidean Space

    E-Print Network [OSTI]

    Kevin Coulembier

    2011-05-11T23:59:59.000Z

    We study Fourier theory on quantum Euclidean space. A modified version of the general definition of the Fourier transform on a quantum space is used and its inverse is constructed. The Fourier transforms can be defined by their Bochner's relations and a new type of q-Hankel transforms using the first and second q-Bessel functions. The behavior of the Fourier transforms with respect to partial derivatives and multiplication with variables is studied. The Fourier transform acts between the two representation spaces for the harmonic oscillator on quantum Euclidean space. By using this property it is possible to define a Fourier transform on the entire Hilbert space of the harmonic oscillator, which is its own inverse and satisfies the Parseval theorem.

  8. DWA as a radiation source

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

    research - Determine achievable field gradients - High energy gain in acceleration - Transformer ratio enhancement - Resonant excitation of structure - Dielectricmetal heating...

  9. High Power, Linear CMOS Power Amplifier for WLAN Applications /

    E-Print Network [OSTI]

    Afsahi, Ali

    2013-01-01T23:59:59.000Z

    components in silicon, achieving a high power enhancement ratio from a single stage LC matching network or single transformer

  10. Nonlinear Transformation Group of CAR Fermion Algebra

    E-Print Network [OSTI]

    Mitsuo Abe; Katsunori Kawamura

    2001-10-01T23:59:59.000Z

    Based on our previous work on the recursive fermion system in the Cuntz algebra, it is shown that a nonlinear transformation group of the CAR fermion algebra is induced from a $U(2^p)$ action on the Cuntz algebra ${\\cal O}_{2^p}$ with an arbitrary positive integer $p$. In general, these nonlinear transformations are expressed in terms of finite polynomials in generators. Some Bogoliubov transformations are involved as special cases.

  11. Non-Hermitian Hamiltonians and similarity transformations

    E-Print Network [OSTI]

    Francisco M. Fernández

    2015-03-06T23:59:59.000Z

    We show that similarity (or equivalent) transformations enable one to construct non-Hermitian operators with real spectrum. In this way we can also prove and generalize the results obtained by other authors by means of a gauge-like transformation and its generalization. Such similarity transformations also reveal the connection with pseudo-Hermiticity in a simple and straightforward way. In addition to it we consider the positive and negative eigenvalues of a three-parameter non-Hermitian oscillator.

  12. Monitoring the health of power transformers

    SciTech Connect (OSTI)

    Kirtley, J.L. Jr.; Hagman, W.H.; Lesieutre, B.C.; Boyd, M.J.; Warren, E.P.; Chou, H.P.; Tabors, R.D. [Massachusetts Inst. of Tech., Cambridge, MA (United States). Lab. for Electromagnetic and Electronic Systems] [Massachusetts Inst. of Tech., Cambridge, MA (United States). Lab. for Electromagnetic and Electronic Systems

    1996-01-01T23:59:59.000Z

    This article reviews MIT`s model-based system which offers adaptive, intelligent surveillance of transformers, and summons attention to anomalous operation through paging devices. Failures of large power transformers are problematic for four reasons. Generally, large transformers are situated so that failures present operational problems to the system. In addition, large power transformers are encased in tanks of flammable and environmentally hazardous fluid. Failures are often accompanied by fire and/or spillage of this fluid. This presents hazards to people, other equipment and property, and the local environment. Finally, large power transformers are costly devices. There is a clear incentive for utilities to keep track of the health of their power transformers. Massachusetts Institute of Technology (MIT) has developed an adaptive, intelligent, monitoring system for large power transformers. Four large transformers on the Boston Edison system are under continuous surveillance by this system, which can summon attention to anomalous operation through paging devices. The monitoring system offers two advantages over more traditional (not adaptive) methods of tracking transformer operation.

  13. An index 2F2 hypergeometric transform

    E-Print Network [OSTI]

    Zouhair Mouayn

    2011-05-12T23:59:59.000Z

    We construct a new one-parameter family of index hypergeometric transforms associated with the relativistic pseudoharmonic oscillator by using coherent states analysis.

  14. Sandia National Laboratories: Transformational Solutions for...

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

    U.S. water supply and demand and explored potential "transformational" solutions from the perspectives of technology and policy (or both) and discussed ... Last Updated: October...

  15. Transformers: The Levers and Gears of Electricity

    Broader source: Energy.gov [DOE]

    This video is a great resource for teachers, demonstrating how transformers work. It includes experiments and demos that can be shared with students.

  16. Displacements and Transformations in Caribbean Cultures

    E-Print Network [OSTI]

    Maurer, Bill

    2010-01-01T23:59:59.000Z

    and Transformations in Caribbean Cultures. LIZABETHdefine a "global Caribbean" (p. 3) characterized bythe authors consider the Caribbean as a problematic more

  17. agrobacterium tumefaciens-mediated transformation: Topics by...

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

    that allows to specify binary relations on graphs Drewes, Frank 51 Constructors transformers Computer Technologies and Information Sciences Websites Summary: Proc. AGTIVE'99,...

  18. Mineralogical transformations controlling acid mine drainage...

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

    Chemical extractions, X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) were used to identify and characterize Fe(III)...

  19. Calculating Plutonium and Praseodymium Structural Transformations...

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

    Calculating Plutonium and Praseodymium Structural Transformations A newly-developed hybrid computational method has computed, for the first time, plutonium's exotic crystal...

  20. Sex ratios in the rodent malaria parasite, Plasmodium chabaudi 

    E-Print Network [OSTI]

    Reece, S E; Duncan, Alison B; West, Stuart A; Read, Andrew F

    2003-01-01T23:59:59.000Z

    The sex ratios of malaria and related Apicomplexan parasites play a major role in transmission success. Here, we address 2 fundamental issues in the sex ratios of the rodent malaria parasite, Plasmodium chabaudi. First we ...

  1. Ultra-short nacelles for low fan pressure ratio propulsors

    E-Print Network [OSTI]

    Peters, Andreas, Ph. D. Massachusetts Institute of Technology

    2014-01-01T23:59:59.000Z

    This thesis addresses the uncharted inlet and nacelle design space for low pressure ratio fans for advanced aeroengines. A key feature in low fan pressure ratio (FPR) propulsors with short inlets and nacelles is the increased ...

  2. Characterization of diamond-like nanocomposite thin films grown by plasma enhanced chemical vapor deposition

    SciTech Connect (OSTI)

    Santra, T. S.; Liu, C. H. [Institute of Nanoengineering and Microsystems (NEMS), National Tsing Hua University, Hsinchu, Taiwan 30043 (China); Bhattacharyya, T. K. [Department of Electronics and Electrical Communication Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal (India); Patel, P. [Department of Electrical and Computer Engineering, University of Illinois at Urbana Champaign, Urbana, Illinois 61801 (United States); Barik, T. K. [School of Applied Sciences, Haldia Institute of Technology, Haldia 721657, Purba Medinipur, West Bengal (India)

    2010-06-15T23:59:59.000Z

    Diamond-like nanocomposite (DLN) thin films, comprising the networks of a-C:H and a-Si:O were deposited on pyrex glass or silicon substrate using gas precursors (e.g., hexamethyldisilane, hexamethyldisiloxane, hexamethyldisilazane, or their different combinations) mixed with argon gas, by plasma enhanced chemical vapor deposition technique. Surface morphology of DLN films was analyzed by atomic force microscopy. High-resolution transmission electron microscopic result shows that the films contain nanoparticles within the amorphous structure. Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and x-ray photoelectron spectroscopy (XPS) were used to determine the structural change within the DLN films. The hardness and friction coefficient of the films were measured by nanoindentation and scratch test techniques, respectively. FTIR and XPS studies show the presence of C-C, C-H, Si-C, and Si-H bonds in the a-C:H and a-Si:O networks. Using Raman spectroscopy, we also found that the hardness of the DLN films varies with the intensity ratio I{sub D}/I{sub G}. Finally, we observed that the DLN films has a better performance compared to DLC, when it comes to properties like high hardness, high modulus of elasticity, low surface roughness and low friction coefficient. These characteristics are the critical components in microelectromechanical systems (MEMS) and emerging nanoelectromechanical systems (NEMS).

  3. GLOBAL STABILITY STUDY OF THE ULTRALOW ASPECT RATIO TOKAMAK,

    E-Print Network [OSTI]

    LETTERS GLOBAL STABILITY STUDY OF THE ULTRALOW ASPECT RATIO TOKAMAK, ULART M. YAMADA, N. POMPHREY of the TS-3device at Tokyo Univesity, ultralow aspect ratio tokamak (ULART) configurations have been of the tiltishift modes agree well with the TS-3 data. 1. INTRODUCTION In recent years, low aspect ratio tokamak

  4. Laser preheat enhanced ignition

    DOE Patents [OSTI]

    Early, James W. (Los Alamos, NM)

    1999-01-01T23:59:59.000Z

    A method for enhancing fuel ignition performance by preheating the fuel with laser light at a wavelength that is absorbable by the fuel prior to ignition with a second laser is provided.

  5. Plasmon Enhanced Photoemission

    E-Print Network [OSTI]

    Polyakov, Aleksandr N.

    2012-01-01T23:59:59.000Z

    160 µm diameter. Such ultra-short laser pulse has a finiteprovided by the ultra-short laser pulses, a plasmon enhancedFigures Free Electron Laser is an ultra-bright light source

  6. Plasmon Enhanced Photoemission

    E-Print Network [OSTI]

    Polyakov, Aleksandr

    2013-01-01T23:59:59.000Z

    160 µm diameter. Such ultra-short laser pulse has a finiteprovided by the ultra-short laser pulses, a plasmon enhancedFigures Free Electron Laser is an ultra-bright light source

  7. Enhanced metabolite generation

    DOE Patents [OSTI]

    Chidambaram, Devicharan (Middle Island, NY)

    2012-03-27T23:59:59.000Z

    The present invention relates to the enhanced production of metabolites by a process whereby a carbon source is oxidized with a fermentative microbe in a compartment having a portal. An electron acceptor is added to the compartment to assist the microbe in the removal of excess electrons. The electron acceptor accepts electrons from the microbe after oxidation of the carbon source. Other transfers of electrons can take place to enhance the production of the metabolite, such as acids, biofuels or brewed beverages.

  8. Effects of fuel type and equivalence ratios on the flickering of triple flames

    SciTech Connect (OSTI)

    Sahu, K.B.; Kundu, A.; Ganguly, R.; Datta, A. [Department of Power Engineering, Jadavpur University, Salt Lake Campus, Kolkata 700098 (India)

    2009-02-15T23:59:59.000Z

    An experimental study has been conducted in axisymmetric, co-flowing triple flames with different equivalence ratios of the inner and outer reactant streams (2<{phi}{sub in}<3 and 0{<=}{phi}{sub out}<0.7). Different fuel combinations, like propane/propane, propane/methane or methane/methane in the inner and outer streams respectively, have been used in the experiments. The structures of the triple flames have been compared for the different fuel combinations and equivalence ratios. The conditions under which triple flames exhibit oscillation have been identified. During the oscillation, the non-premixed flame and the outer lean premixed flame flicker strongly, while the inner rich premixed flame remains more or less stable. The flickering frequency has been evaluated through image processing and fast Fourier transform (FFT) of the average pixel intensity of the image frames. It is observed that, for all the fuel combinations, the frequency decreases with the increase in the outer equivalence ratio, while it is relatively invariant with the change in the inner equivalence ratio. However, an increase in the inner equivalence ratio affects the structure of the flame by increasing the heights of the inner premixed flame and non-premixed flame and also enlarges the yellow soot-laden zone at the tip of the inner flame. A scaling analysis of the oscillating flames has been performed based on the measured parameters, which show a variation of Strouhal number (St) with Richardson number (Ri) as St {proportional_to} Ri{sup 0.5}. The fuel type is found to have no influence on this correlation. (author)

  9. Parallelization and checkpointing of GPU applications through program transformation

    SciTech Connect (OSTI)

    Solano-Quinde, Lizandro Dami#19; an [Ames Laboratory

    2012-11-15T23:59:59.000Z

    GPUs have emerged as a powerful tool for accelerating general-purpose applications. The availability of programming languages that makes writing general-purpose applications for running on GPUs tractable have consolidated GPUs as an alternative for accelerating general purpose applications. Among the areas that have beneffited from GPU acceleration are: signal and image processing, computational fluid dynamics, quantum chemistry, and, in general, the High Performance Computing (HPC) Industry. In order to continue to exploit higher levels of parallelism with GPUs, multi-GPU systems are gaining popularity. In this context, single-GPU applications are parallelized for running in multi-GPU systems. Furthermore, multi-GPU systems help to solve the GPU memory limitation for applications with large application memory footprint. Parallelizing single-GPU applications has been approached by libraries that distribute the workload at runtime, however, they impose execution overhead and are not portable. On the other hand, on traditional CPU systems, parallelization has been approached through application transformation at pre-compile time, which enhances the application to distribute the workload at application level and does not have the issues of library-based approaches. Hence, a parallelization scheme for GPU systems based on application transformation is needed. Like any computing engine of today, reliability is also a concern in GPUs. GPUs are vulnerable to transient and permanent failures. Current checkpoint/restart techniques are not suitable for systems with GPUs. Checkpointing for GPU systems present new and interesting challenges, primarily due to the natural differences imposed by the hardware design, the memory subsystem architecture, the massive number of threads, and the limited amount of synchronization among threads. Therefore, a checkpoint/restart technique suitable for GPU systems is needed. The goal of this work is to exploit higher levels of parallelism and to develop support for application-level fault tolerance in applications using multiple GPUs. Our techniques reduce the burden of enhancing single-GPU applications to support these features. To achieve our goal, this work designs and implements a framework for enhancing a single-GPU OpenCL application through application transformation.

  10. Effects of nuclear absorption on the antiLambda/antiproton ratio in relativistic heavy ion collisions

    E-Print Network [OSTI]

    Fuqiang Wang; Marlene Nahrgang; Marcus Bleicher

    2012-06-30T23:59:59.000Z

    An enhanced antiLambda/antiproton ratio in heavy-ion relative to p+p collisions has been proposed as one of the signatures for the Quark-Gluon Plasma (QGP) formation. A significantly large (antiLambda+antiSigma0+1.1*antiSigma-)/antiproton ratio of 3.5 has been observed in the mid-rapidity and low transverse momentum region in central Au+Au collisions at the nucleon-nucleon center-of-mass energy of 4.9 GeV at the Alternating Gradient Synchrotron (AGS). This is an order of magnitude larger than the values in peripheral Au+Au collisions and p+p collisions at the corresponding energy. By using the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) transport model, we demonstrate that the observed large ratio can be explained by strong absorption of antiprotons (~99.9%) and antiLambdas (~99%) in dense nuclear matter created in central collisions. We find within the model that the initial antiLambda/antiproton ratio, mainly from string fragmentation, does not depend on the collision centrality, and is consistent with that observed in p+p collisions. This suggests that the observed large (antiLambda+antiSigma0+1.1*antiSigma-)/antiproton ratio at the AGS does not necessarily imply the formation of the QGP. We further study the excitation function of the ratio in UrQMD, which may help in the search and study of the QGP.

  11. Linear Transformations In this Chapter, we will define the notion of a linear transformation between

    E-Print Network [OSTI]

    Carrell, Jim

    Chapter 6 Linear Transformations In this Chapter, we will define the notion of a linear transformation between two vector spaces V and W which are defined over the same field and prove the most basic transformations is equivalent to matrix theory. We will also study the geometric properties of linear

  12. ZAKKAROFF et al.: STACK ALIGNMENT TRANSFORM 1 Stack Alignment Transform for Misalignment

    E-Print Network [OSTI]

    Magee, Derek

    alignment transform which parametrises the in-plane movement for all slices independently of each otherZAKKAROFF et al.: STACK ALIGNMENT TRANSFORM 1 Stack Alignment Transform for Misalignment Correction- nesses associated with slice-to-volume registration. The core of the presented method is a custom stack

  13. The Xi-transform for conformally flat space-time

    E-Print Network [OSTI]

    George Sparling

    2006-12-01T23:59:59.000Z

    The Xi-transform is a new spinor transform arising naturally in Einstein's general relativity. Here the example of conformally flat space-time is discussed in detail. In particular it is shown that for this case, the transform coincides with two other naturally defined transforms: one a two-variable transform on the Lie group SU(2, C), the other a transform on the space of null split octaves. The key properties of the transform are developed.

  14. Power Transformer Application for Wind Plant Substations

    SciTech Connect (OSTI)

    Behnke, M. R. [IEEE PES Wind Plant Collector System Design Working Group; Bloethe, W.G. [IEEE PES Wind Plant Collector System Design Working Group; Bradt, M. [IEEE PES Wind Plant Collector System Design Working Group; Brooks, C. [IEEE PES Wind Plant Collector System Design Working Group; Camm, E H [IEEE PES Wind Plant Collector System Design Working Group; Dilling, W. [IEEE PES Wind Plant Collector System Design Working Group; Goltz, B. [IEEE PES Wind Plant Collector System Design Working Group; Li, J. [IEEE PES Wind Plant Collector System Design Working Group; Niemira, J. [IEEE PES Wind Plant Collector System Design Working Group; Nuckles, K. [IEEE PES Wind Plant Collector System Design Working Group; Patino, J. [IEEE PES Wind Plant Collector System Design Working Group; Reza, M [IEEE PES Wind Plant Collector System Design Working Group; Richardson, B. [IEEE PES Wind Plant Collector System Design Working Group; Samaan, N. [IEEE PES Wind Plant Collector System Design Working Group; Schoene, Jens [IEEE PES Wind Plant Collector System Design Working Group; Smith, Travis M [ORNL; Snyder, Isabelle B [ORNL; Starke, Michael R [ORNL; Walling, R. [IEEE PES Wind Plant Collector System Design Working Group; Zahalka, G. [IEEE PES Wind Plant Collector System Design Working Group

    2010-01-01T23:59:59.000Z

    Wind power plants use power transformers to step plant output from the medium voltage of the collector system to the HV or EHV transmission system voltage. This paper discusses the application of these transformers with regard to the selection of winding configuration, MVA rating, impedance, loss evaluation, on-load tapchanger requirements, and redundancy.

  15. Point transformations in invariant difference schemes

    E-Print Network [OSTI]

    Francis Valiquette

    2005-07-17T23:59:59.000Z

    In this paper, we show that when two systems of differential equations admitting a symmetry group are related by a point transformation it is always possible to generate invariant schemes, one for each system, that are also related by the same transformation. This result is used to easily obtain new invariant schemes of some differential equations.

  16. Transformation of structured documents Eila Kuikka

    E-Print Network [OSTI]

    Waterloo, University of

    Transformation of structured documents Eila Kuikka Department of Computer Science, University Structure de nitions of documents have been used successfully for inputting and for- matting in text documents and studies possibilities to extend the use of structure de nitions to document transformations

  17. A broadband transformation-optics metasurface lens

    SciTech Connect (OSTI)

    Wan, Xiang; Xiang Jiang, Wei; Feng Ma, Hui; Jun Cui, Tie, E-mail: tjcui@seu.edu.cn [State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096 (China)

    2014-04-14T23:59:59.000Z

    We present a transformational metasurface Luneburg lens based on the quasi-conformal mapping method, which has weakly anisotropic constitutive parameters. We design the metasurface lens using inhomogeneous artificial structures to realize the required surface refractive indexes. The transformational metasurface Luneburg lens is fabricated and the measurement results demonstrate very good performance in controlling the radiated surface waves.

  18. Fourier Transform, Riemann Surfaces and Indefinite Metric

    E-Print Network [OSTI]

    Fominov, Yakov

    Fourier Transform, Riemann Surfaces and Indefinite Metric P. G. Grinevich, S.P.Novikov Zakharov Park, College Park, USA #12;What is Fourier Transform in Riemann Surfaces? Which Problems need it? Discrete Analog of The Fourier/Laurent bases in Riemann Sur- faces was constructed by Krichever-Novikov (KN

  19. Accelerating the transformation of power systems

    E-Print Network [OSTI]

    Accelerating the transformation of power systems Ancillary Services Peer Exchange with India in power system transformation is an increasingly vital resource for national and subnational decision of power systems. The Power Partnership is a multilateral effort of the Clean Energy Ministerial and serves

  20. Proof Transformations for Evolutionary Formal Software Development

    E-Print Network [OSTI]

    Siekmann, Jörg H.

    German Research Center for Arti#12;cial Intelligence (DFKI GmbH), Stuhlsatzenhausweg 3, 66123 Saarbr by applying several basic transformations in sequence. The result is a transformed speci#12;ca- tion with verifying the cor- rectness of program code with respect to a speci#12;cation, which was assumed to be given

  1. Arbitrary Transform Telescopes: The Generalization of Interferometry

    E-Print Network [OSTI]

    Lacki, Brian C

    2015-01-01T23:59:59.000Z

    The basic principle of astronomical interferometry is to derive the angular distribution of radiation in the sky from the Fourier transform of the electric field on the ground. What is so special about the Fourier transform? Nothing, it turns out. I consider the possibility of performing other transforms on the electric field with digital technology. The Fractional Fourier Transform (FrFT) is useful for interpreting observations of sources that are close to the interferometer (in the atmosphere for radio interferometers). Essentially, applying the FrFT focuses the array somewhere nearer than infinity. Combined with the other Linear Canonical Transforms, any homogeneous linear optical system with thin elements can be instantiated. The time variation of the electric field can also be decomposed into other bases besides the Fourier modes, which is especially useful for dispersed transients or quick pulses. I discuss why the Fourier basis is so commonly used, and suggest it is partly because most astrophysical so...

  2. Accretion of dust grains as a possible origin of metal-poor stars with low alpha/Fe ratios

    E-Print Network [OSTI]

    Toshikazu Shigeyama; Takuji Tsujimoto

    2003-10-10T23:59:59.000Z

    The origin of low alpha/Fe ratios in some metal-poor stars, so called low-alpha stars, is discussed. It is found that most of low-alpha stars in the Galaxy are on the main-sequence. This strongly suggests that these stars suffered from external pollution. It is also found that the abundance ratios Zn/Fe of low-alpha stars both in the Galaxy and in dwarf spheroidal galaxies are lower than the average value of Galactic halo stars whereas damped Ly alpha absorbers have higher ratios. This implies that some low-alpha stars accreted matter depleted from gas onto dust grains. To explain the features in these low-alpha stars, we have proposed that metal-poor stars harboring planetary systems are the origin of these low-alpha stars. Stars engulfing a small fraction of planetesimals enhance the surface content of Fe to exhibit low alpha/Fe ratios on their surfaces while they are on the main-sequence, because dwarfs have shallow surface convection zones where the engulfed matter is mixed. After the stars leave the main-sequence, the surface convection zones become deeper to reduce the enhancement of Fe. Eventually, when the stars ascend to the tip of the red giant branch, they engulf giant planets to become low-alpha stars again as observed in dwarf spheroidal galaxies. We predict that low-alpha stars with low Mn/Fe ratios harbor planetary systems.

  3. Radiation detection method and system using the sequential probability ratio test

    DOE Patents [OSTI]

    Nelson, Karl E. (Livermore, CA); Valentine, John D. (Redwood City, CA); Beauchamp, Brock R. (San Ramon, CA)

    2007-07-17T23:59:59.000Z

    A method and system using the Sequential Probability Ratio Test to enhance the detection of an elevated level of radiation, by determining whether a set of observations are consistent with a specified model within a given bounds of statistical significance. In particular, the SPRT is used in the present invention to maximize the range of detection, by providing processing mechanisms for estimating the dynamic background radiation, adjusting the models to reflect the amount of background knowledge at the current point in time, analyzing the current sample using the models to determine statistical significance, and determining when the sample has returned to the expected background conditions.

  4. Ratio of shear viscosity to entropy density in generalized theories of gravity

    SciTech Connect (OSTI)

    Brustein, Ram; Medved, A. J. M. [Department of Physics, Ben-Gurion University, Beer-Sheva 84105 (Israel); Physics Department, University of Seoul, Seoul 130-743 (Korea, Republic of)

    2009-01-15T23:59:59.000Z

    Near the horizon of a black brane solution in anti-de Sitter space, the long-wavelength fluctuations of the metric exhibit hydrodynamic behavior. For Einstein's theory, the ratio of the shear viscosity of near-horizon metric fluctuations {eta} to the entropy per unit of transverse volume s is {eta}/s=1/4{pi}. We propose that, in generalized theories of gravity, this ratio is given by the ratio of two effective gravitational couplings and can be different than 1/4{pi}. Our proposal confirms that {eta}/s is equal to 1/4{pi} for any theory that can be transformed into Einstein's theory, such as F(R) gravity. Our proposal also implies that matter interactions--except those including explicit or implicit factors of the Riemann tensor--will not modify {eta}/s. The proposed formula reproduces, in a very simple manner, some recently found results for Gauss-Bonnet gravity. We also make a prediction for {eta}/s in Lovelock theories of any order or dimensionality.

  5. 424 IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING, VOL. 5, NO. 3, JUNE 2011 Sparse Matrix Transform for Hyperspectral

    E-Print Network [OSTI]

    covariance estimator--the sparse ma- trix transform (SMT), a shrinkage-enhanced SMT, and a graph- constrained SMT--in the context of several of these problems. In addition to two more generic measures of quality of data for which SMT is well or poorly suited. The SMT is based on the product of pairwise coordinate

  6. Pion Freeze-Out Time in Pb+Pb Collisions at 158 A GeV/c Studied via pi-/pi+ and K-/K+ Ratios

    E-Print Network [OSTI]

    WA98 Collaboration

    2006-07-16T23:59:59.000Z

    The effect of the final state Coulomb interaction on particles produced in Pb+Pb collisions at 158 A GeV/c has been investigated in the WA98 experiment through the study of the pi-/pi+ and K-/K+ ratios measured as a function of transverse mass. While the ratio for kaons shows no significant transverse mass dependence, the pi-/pi+ ratio is enhanced at small transverse mass values with an enhancement that increases with centrality. A silicon pad detector located near the target is used to estimate the contribution of hyperon decays to the pi-/pi+ ratio. The comparison of results with predictions of the RQMD model in which the Coulomb interaction has been incorporated allows to place constraints on the time of the pion freeze-out.

  7. ContentsContents2424Fourier 1. The Fourier transform

    E-Print Network [OSTI]

    Vickers, James

    ContentsContents2424Fourier transforms 1. The Fourier transform 2. Properties of the Fourier Transform 3. Some Special Fourier Transform Pairs Learning outcomes needs doing Time allocation You mathematical topics this time may vary considerably. 1 #12;The Fourier Transform 24.1 Introduction

  8. Transformation of chlorinated phenols and anilines in the presence of humic acid

    SciTech Connect (OSTI)

    Park, J.W.; Dec, J.; Kim, J.E.; Bollag, J.M.

    2000-02-01T23:59:59.000Z

    Incubations of chlorinated phenols and anilines with oxidoreductive catalysts (peroxidase, laccase, tyrosinase, and birnessite) in the presence of humic acid led to oligomerization of the substrates or their binding to organic matter. The effect of humic acid on the overall transformation depended on the substrate, type of catalyst, and the concentration and source of humic acid. At low humic acid concentrations, the transformation of 4-chlorophenol (4-CP) was enhanced, but at higher concentrations of humic acid, no further enhancement occurred. The transformation of 4-chloroaniline (4-CA) was only slightly affected after the addition of humic acid. In experiments with {sup 14}C-labeled substrates, 4-CP was mainly bound to humic acid and formed few oligomers, whereas 4-CA was largely subject to oligomerization with less binding to humic acid. Binding and oligomerization of 4-CP did not change with increasing concentration of humic acid, but with 4-CA, binding increased and oligomerization decreased. It appears that nucleophilic binding of 4-CA depended largely on the availability of carbonyl and quinone groups in humic acid and, therefore, the distribution of the transformed substrate between oligomers and organic matter greatly depended on the source of humic acid.

  9. SPEECH ENHANCEMENT FOR CROSSTALK INTERFERENCE

    E-Print Network [OSTI]

    SPEECH ENHANCEMENT FOR CROSS­TALK INTERFERENCE by Levent M. Arslan and John H.L. Hansen Robust. Based on this noise esti­ mate, a new speech enhancement technique is proposed. The enhancement method EDICS Code: SPL.SA.1.5 Speech Enhancement submitted Jan. 19, 1996 to IEEE Signal Processing Letters

  10. Transformations between symmetric sets of quantum states

    E-Print Network [OSTI]

    Vedran Dunjko; Erika Andersson

    2012-06-22T23:59:59.000Z

    We investigate probabilistic transformations of quantum states from a `source' set to a `target' set of states. Such transforms have many applications. They can be used for tasks which include state-dependent cloning or quantum state discrimination, and as interfaces between systems whose information encodings are not related by a unitary transform, such as continuous-variable systems and finite-dimensional systems. In a probabilistic transform, information may be lost or leaked, and we explain the concepts of leak and redundancy. Following this, we show how the analysis of probabilistic transforms significantly simplifies for symmetric source and target sets of states. In particular, we give a simple linear program which solves the task of finding optimal transforms, and a method of characterizing the introduced leak and redundancy in information-theoretic terms. Using the developed techniques, we analyse a class of transforms which convert coherent states with information encoded in their relative phase to symmetric qubit states. Each of these sets of states on their own appears in many well studied quantum information protocols. Finally, we suggest an asymptotic realization based on quantum scissors.

  11. Enhanced thermoelectric properties in hybrid graphene-boron nitride nanoribbons

    E-Print Network [OSTI]

    Kaike Yang; Yuanping Chen; Roberto D'Agosta; Yuee Xie; Jianxin Zhong; Angel Rubio

    2012-04-06T23:59:59.000Z

    The thermoelectric properties of hybrid graphene-boron nitride nanoribbons (BCNNRs) are investigated using the non-equilibrium Green's function (NEGF) approach. We find that the thermoelectric figure of merit (ZT) can be remarkably enhanced by periodically embedding hexagonal BN (h-BN) into graphene nanoribbons (GNRs). Compared to pristine GNRs, the ZT for armchair-edged BCNNRs with width index 3p+2 is enhanced up to 10~20 times while the ZT of nanoribbons with other widths is enhanced just by 1.5~3 times. As for zigzag-edge nanoribbons, the ZT is enhanced up to 2~3 times. This improvement comes from the combined increase in the Seebeck coefficient and the reduction in the thermal conductivity outweighing the decrease in the electrical conductance. In addition, the effect of component ratio of h-BN on the thermoelectric transport properties is discussed. These results qualify BCNNRs as a promising candidate for building outstanding thermoelectric devices.

  12. Enhanced thermoelectric properties in hybrid graphene-boron nitride nanoribbons

    E-Print Network [OSTI]

    Yang, Kaike; D'Agosta, Roberto; Xie, Yuee; Zhong, Jianxin; Rubio, Angel

    2012-01-01T23:59:59.000Z

    The thermoelectric properties of hybrid graphene-boron nitride nanoribbons (BCNNRs) are investigated using the non-equilibrium Green's function (NEGF) approach. We find that the thermoelectric figure of merit (ZT) can be remarkably enhanced by periodically embedding hexagonal BN (h-BN) into graphene nanoribbons (GNRs). Compared to pristine GNRs, the ZT for armchair-edged BCNNRs with width index 3p+2 is enhanced up to 10~20 times while the ZT of nanoribbons with other widths is enhanced just by 1.5~3 times. As for zigzag-edge nanoribbons, the ZT is enhanced up to 2~3 times. This improvement comes from the combined increase in the Seebeck coefficient and the reduction in the thermal conductivity outweighing the decrease in the electrical conductance. In addition, the effect of component ratio of h-BN on the thermoelectric transport properties is discussed. These results qualify BCNNRs as a promising candidate for building outstanding thermoelectric devices.

  13. Transformations of $W$-Type Entangled States

    E-Print Network [OSTI]

    S. K?nta?; S. Turgut

    2010-03-10T23:59:59.000Z

    The transformations of $W$-type entangled states by using local operations assisted with classical communication are investigated. For this purpose, a parametrization of the $W$-type states which remains invariant under local unitary transformations is proposed and a complete characterization of the local operations carried out by a single party is given. These are used for deriving the necessary and sufficient conditions for deterministic transformations. A convenient upper bound for the maximum probability of distillation of arbitrary target states is also found.

  14. A Family of Circular Bargmann Transforms

    E-Print Network [OSTI]

    Zouhair Mouayn

    2011-05-24T23:59:59.000Z

    When considering a charged particle evolving in the Poincar\\'e disk under influence of a uniform magnetic field with a strength proportional to +1, we construct for all hyperbolic Landau level \\epsilon^\\gamma_$m$ m = 4m(-m), m 2 Z+ \\[0, /2] a family of coherent states transforms labeled by (,m) and mapping isometrically square integrable functions on the unit circle with respect to the measure sin^\\gamma-2m (\\theta/2) d\\theta onto spaces of bound states of the particle. These transforms are called circular Bargmann transforms.

  15. Dual equilibrium in a finite aspect ratio tokamak

    E-Print Network [OSTI]

    Gourdain, P A

    2008-01-01T23:59:59.000Z

    achievable in conventional tokamaks. Previous research hasin a ?nite aspect ratio tokamak P. -A. Gourdain a , b ,? ,fusion reactor is the tokamak concept, a closed magnetic

  16. Neutrino Flavor Ratios Modified by Cosmic Ray Re-acceleration

    E-Print Network [OSTI]

    Kawanaka, Norita

    2015-01-01T23:59:59.000Z

    Re-acceleration of $\\pi$'s and $\\mu$'s modifies the flavor ratio at Earth (at astrophysical sources) of neutrinos produced by $\\pi$ decay, $\

  17. aspect ratio spherical: Topics by E-print Network

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

    Stability Modes of Low-Aspect-Ratio Wings Matt Shields Engineering Websites Summary: vehicles (MAVs) ranging from flexiblemorphing wing aircraft to nano- and pico-scale...

  18. aspect ratio toroidal: Topics by E-print Network

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

    Stability Modes of Low-Aspect-Ratio Wings Matt Shields Engineering Websites Summary: vehicles (MAVs) ranging from flexiblemorphing wing aircraft to nano- and pico-scale...

  19. aerosol ratio program: Topics by E-print Network

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

    contribute a major portion of atmospheric aerosol mass loading 5. The estimated global annual Liou, K. N. 2 Studying Clouds and Aerosols with Lidar Depolarization Ratio and...

  20. aspect ratio aluminium: Topics by E-print Network

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

    perturbations Reynolds numbers Re) by means of the minimal amplitude of an initial global perturbation triggering Meseguer, Alvaro 9 Effect of mineral dust aerosol aspect ratio...

  1. Oxygen And Carbon Isotope Ratios Of Hydrothermal Minerals From...

    Open Energy Info (EERE)

    Oxygen And Carbon Isotope Ratios Of Hydrothermal Minerals From Yellowstone Drill Cores Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Oxygen...

  2. Properties of Some Integral Transforms Arising in Tomography 

    E-Print Network [OSTI]

    Moon, Sunghwan

    2013-10-11T23:59:59.000Z

    introduce a different Radon-type transform arising in photo acoustic tomography with circular detectors, and study mathematically similar object, a toroidal Radon transform. We also consider the cone transform arising in Compton camera imaging as well...

  3. Modeling and Characterization of On-Chip Transformers

    E-Print Network [OSTI]

    Lee, Thomas H.

    Modeling and Characterization of On-Chip Transformers Sunderarajan S. Mohan, C. Patrick Yue, Maria #12;OUTLINE Motivation Background On-chip transformer realizations Models Experimental verification Summary #12;MOTIVATION FOR TRANSFORMER MODELING Essential for Radio Frequency Integrated Circuits (RFICs

  4. Future Directions In Program Transformations 1 New York University

    E-Print Network [OSTI]

    Paige, Robert

    for real time applications, design automation, operations research, genetic engineering, optimizingFuture Directions In Program Transformations 1 R. Paige New York University As the emphasis transformations has naturally gained in importance. This paper briefly surveys what transformational programming

  5. A Transformation System for Lazy Functional Logic Programs?

    E-Print Network [OSTI]

    Vidal, Germán

    over to the transformation process and the transformed programs. We illus- trate the power A Transformation System for Lazy Functional Logic Programs? Mar. gmoreno@info-ab.uclm.es Abstract. Needed narrowing is a complete operational principle

  6. GENERALIZED FOURIER TRANSFORMATIONS: THE WORK OF BOCHNER AND CARLEMAN

    E-Print Network [OSTI]

    Kiselman, Christer

    GENERALIZED FOURIER TRANSFORMATIONS: THE WORK OF BOCHNER AND CARLEMAN-1949) presented gen- eralizations of the Fourier transform of functions defined on the real axis* *. While Bochner's idea was to define the Fourier transform as a (formal) derivative* * of high order

  7. Gyro Enhanced Orientation Sensor

    E-Print Network [OSTI]

    Sheikh, Yaser Ajmal

    ­ container handling, hydraulic lift systems, machine tools www.microstrain.com #12;Copyright © 2006 Micro3DM-GX1® Gyro Enhanced Orientation Sensor Technical Product Overview Micro Sensors.Big Ideas protocol. Embedded microcontrollers relieve the host system from the burden of orientation calculations

  8. The Enhanced Fujita Tornado

    E-Print Network [OSTI]

    Beaufort Force 12 with Mach 1 in twelve steps. The equation relating the wind velocities (V in mphThe Enhanced Fujita Tornado Scale Wind speeds in tornadoes range from values below that of weak hurricane speeds to more than 300 miles per hour! Unlike hurricanes, which produce wind speeds of generally

  9. Women Leaders in Medicine: Institutional Transformation Required

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Women Leaders in Medicine: Institutional Transformation Required Molly Carnes, MD, MS Professor, Depts Medicine, Psychiatry, and Industrial & Systems Engineering University of Wisconsin Director, Women's progress toward leadership #12;Sexist discrimination still exists ­ it is just less blatant than

  10. Regeneration and genetic transformation of Atriplex canescens

    E-Print Network [OSTI]

    Mei, Beijian

    1995-01-01T23:59:59.000Z

    . In this research, methods for Atriplex regeneration and genetic transformation were developed with the objective of understanding gene functions as well as developing gene transfer technology for the improved quality of this native shrub. Organogenesis from leaf...

  11. Lean transformation of a supply chain organization

    E-Print Network [OSTI]

    Walsh, Daniel Andres

    2008-01-01T23:59:59.000Z

    There are two basic schools of thought regarding how to approach a Lean transformation. Either start with introducing Lean tools or start with driving a Lean cultural change. Academic researchers like Steve Spear (Harvard/MIT), ...

  12. Program Transformations in Weak Memory Models 

    E-Print Network [OSTI]

    Sevcik, Jaroslav

    2009-01-01T23:59:59.000Z

    We analyse the validity of common optimisations on multi-threaded programs in two memory models—the DRF guarantee and the Java Memory Model. Unlike in the single-threaded world, even simple program transformations, such ...

  13. Sustainability transformations in Olympic host cities

    E-Print Network [OSTI]

    Mokrushina, Ksenia

    2012-01-01T23:59:59.000Z

    The Olympic Games represent an unparalleled fast-track urban development opportunity for Olympic host cities. Taking the premise that the transformational effect of the Olympics has a potential to drive long-term urban ...

  14. A non-destructive transformer oil tester

    E-Print Network [OSTI]

    Cargol, Timothy L. (Timothy Lawrence), 1976-

    2000-01-01T23:59:59.000Z

    A new non-destructive test of transformer oil dielectric strength is a promising technique to automate and make more reliable a diagnostic that presently involves intensive manual efforts. This thesis focuses some of the ...

  15. Deforestation: Transforming programs to eliminate trees

    E-Print Network [OSTI]

    Wadler, Philip

    Deforestation: Transforming programs to eliminate to eliminate inter* *mediate lists_and intermediate trees_called the Deforestation Algorithm. A form of fun. Treeless form and the Deforestation Algorithm are presented in three steps. * *The first step presents

  16. Abiotic and Biological Transformation of Tetraalkoxysilanes

    E-Print Network [OSTI]

    Semprini, Lewis

    . An aerobic microbial culture from the local wastewater treatment plant that could grow and mineralizeAbiotic and Biological Transformation of Tetraalkoxysilanes and Trichloroethene/ cis-1 compounds (tetra- alkoxysilanes) by abiotic hydrolysis and biological mineralization was investigated

  17. Positive and negative effects of dielectric breakdown in transformer oil based magnetic fluids

    SciTech Connect (OSTI)

    Lee, Jong-Chul, E-mail: jclee01@gwnu.ac.kr [School of Mechanical and Automotive Engineering, Gangneung-Wonju National University, Wonju 220711 (Korea, Republic of)] [School of Mechanical and Automotive Engineering, Gangneung-Wonju National University, Wonju 220711 (Korea, Republic of); Lee, Won-Ho [Graduate School of Automotive Engineering, Gangneung-Wonju National University, Wonju 220711 (Korea, Republic of)] [Graduate School of Automotive Engineering, Gangneung-Wonju National University, Wonju 220711 (Korea, Republic of); Lee, Se-Hee [Department of Electrical Engineering, Kyungpook National University, Daegu 702701 (Korea, Republic of)] [Department of Electrical Engineering, Kyungpook National University, Daegu 702701 (Korea, Republic of); Lee, Sangyoup, E-mail: sangyoup@kist.re.kr [Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 136791 (Korea, Republic of)] [Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 136791 (Korea, Republic of)

    2012-10-15T23:59:59.000Z

    The transformer oil based magnetic fluids can be considered as the next-generation insulation fluids because they offer exciting new possibilities to enhance dielectric breakdown voltage as well as heat transfer performance compared to pure transformer oils. In this study, we have investigated the dielectric breakdown strength of the fluids with the various volume concentrations of nanoparticles in accordance with IEC 156 standard and have tried to find the reason for changing the dielectric breakdown voltage of the fluids from the magnetic field analysis. It was found that the dielectric breakdown voltage of pure transformer oil is around 12 kV with the gap distance of 1.5 mm. In the case of our transformer oil-based magnetic fluids with 0.08% < ? < 0.6% (? means the volume concentration of magnetic nanoparticles), the dielectric breakdown voltage shows above 40 kV, which is 3.3 times higher positively than that of pure transformer oil. Negatively in the case when the volume concentration of magnetic nanoparticles is above 0.65%, the dielectric breakdown voltage decreases reversely. From the magnetic field analysis, the reason might be considered as two situations: the positive is for the conductive nanoparticles dispersed well near the electrodes, which play an important role in converting fast electrons to slow negatively charged particles, and the negative is for the agglomeration of the particles near the electrodes, which leads to the breakdown initiation.

  18. Phase space dynamics of triaxial collapse: II. Universal evolution of axis ratios

    E-Print Network [OSTI]

    Nadkarni-Ghosh, Sharvari

    2015-01-01T23:59:59.000Z

    In paper I of this series, we examined triaxial collapse in terms of the dynamics of eigenvalues of three important tensors: the Hessian of the gravitational potential, the tensor of velocity derivatives and the deformation tensor. The first paper focussed on the joint gravity-velocity dynamics and here we focus on the deformation tensor, which is directly related to the axes' evolution. We examine the evolution of the minor to major and intermediate to major axes ratios ($s$ and $q$) and the triaxiality parameter $T$ as function of mass scale and redshift. We find that the ellipticity and prolateness increase with decreasing mass scale and decreasing redshift. These trends, while in agreement with previous analytic studies, contradict numerical simulations. Nevertheless, we find that a suitable transformation of $s$, motivated by the scaling used in recent analysis of the Millennium XXL simulations by Bonamigo {\\it et al} (2014), has a universal log-normal distribution function that matches their numerical r...

  19. Stellar population models of Lick indices with variable element abundance ratios

    E-Print Network [OSTI]

    Daniel Thomas; Claudia Maraston; Ralf Bender

    2002-11-12T23:59:59.000Z

    We provide the whole set of Lick indices from CN1 to TiO2 of Simple Stellar Population models with, for the first time, variable element abundance ratios, [alpha/Fe]=0.0, 0.3, 0.5, [alpha/Ca]=-0.1, 0.0, 0.2, 0.5, and [alpha/N]=-0.5, 0.0. The models cover ages between 1 and 15 Gyr, metallicities between 1/200 and 3.5 solar. Our models are free from the intrinsic alpha/Fe bias that was imposed by the Milky Way template stars up to now, hence they reflect well-defined alpha/Fe ratios at all metallicities. The models are calibrated with Milky Way globular clusters for which metallicities and alpha/Fe ratios are known from independent spectroscopy of individual stars. The metallicities that we derive from the Lick indices Mgb and Fe5270 are in excellent agreement with the metallicity scale by Zinn & West (1984), and we show that the latter provides total metallicity rather than iron abundance. We can reproduce the relatively strong CN-absorption features CN1 and CN2 of galactic globular clusters with models in which nitrogen is enhanced by a factor three. An enhancement of carbon, instead, would lead to serious inconsistencies with the indices Mg1 and C24668. The calcium sensitive index Ca4227 of globular clusters is well matched by our models with [Ca/Fe]= 0.3, including the metal-rich Bulge clusters NGC 6528 and NGC 6553. From our alpha/Fe enhanced models we infer that the index [MgFe] defined by Gonzalez (1993) is quite independent of alpha/Fe, but still slightly decreases with increasing alpha/Fe. We define a slight modification of this index that is completely independent of alpha/Fe and serves best as a tracer of total metallicity. Searching for blue indices that give similar information as Mgb and Fe, we find that CN1 and Fe4383 may be best suited to estimate alpha/Fe ratios of objects at redshifts z~1. (Abridged)

  20. Project Profile: Transformational Approach to Reducing the Total...

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

    Transformational Approach to Reducing the Total System Costs of Building-Integrated Photovoltaics Project Profile: Transformational Approach to Reducing the Total System Costs of...

  1. Building America Whole-House Solutions for New Homes: Transformations...

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

    Transformations, Inc. Net Zero Energy Communities (Fact Sheet) Building America Whole-House Solutions for New Homes: Transformations, Inc. Net Zero Energy Communities (Fact Sheet)...

  2. ARPA-E Announces $43 Million for Transformational Energy Storage...

    Energy Savers [EERE]

    43 Million for Transformational Energy Storage Projects to Advance Electric Vehicle and Grid Technologies ARPA-E Announces 43 Million for Transformational Energy Storage Projects...

  3. Biogeochemical Transformation of Fe Minerals in a Petroleum-Contaminat...

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

    Transformation of Fe Minerals in a Petroleum-Contaminated Aquifer. Biogeochemical Transformation of Fe Minerals in a Petroleum-Contaminated Aquifer. Abstract: Biogeochemical...

  4. DOE Zero Energy Ready Home Case Study: Transformation Inc., Production...

    Energy Savers [EERE]

    Transformation Inc., Production House, Devens, MA DOE Zero Energy Ready Home Case Study: Transformation Inc., Production House, Devens, MA Case study of a DOE Zero Energy Ready...

  5. Energy Transformation in the U.S. Virgin Islands | Department...

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

    About Us Initiatives & Projects Energy Transition Initiative Energy Transformation in the U.S. Virgin Islands Energy Transformation in the U.S. Virgin Islands Click on the...

  6. Planar Optical Waveguide Coupler Transformers for High-Power...

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

    Planar Optical Waveguide Coupler Transformers for High-Power Solar Enegy Collection and Transmission Planar Optical Waveguide Coupler Transformers for High-Power Solar Enegy...

  7. arsenical-induced malignant transformation: Topics by E-print...

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

    due to altered sialylation of cell surface Paris-Sud XI, Universit de 33 Monad Transformers as Monoid Transformers Mauro Jaskelioff Computer Technologies and Information...

  8. Genetic Transformation and Mutagenesis Via Single-Stranded DNA...

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

    Genetic Transformation and Mutagenesis Via Single-Stranded DNA in the Unicellular, Diazotrophic Cyanobacteria of the Genus Genetic Transformation and Mutagenesis Via...

  9. C60 Secondary Ion Fourier Transform Ion Cyclotron Resonance Mass...

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

    C60 Secondary Ion Fourier Transform Ion Cyclotron Resonance Mass Spectrometry. C60 Secondary Ion Fourier Transform Ion Cyclotron Resonance Mass Spectrometry. Abstract: Secondary...

  10. High Throughput Operando Studies using Fourier Transform Infrared...

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

    Throughput Operando Studies using Fourier Transform Infrared Imaging and Raman Spectroscopy. High Throughput Operando Studies using Fourier Transform Infrared Imaging and Raman...

  11. Vortex Hydro Energy Develops Transformational Technology to Harness...

    Energy Savers [EERE]

    Vortex Hydro Energy Develops Transformational Technology to Harness Energy from Water Currents Vortex Hydro Energy Develops Transformational Technology to Harness Energy from Water...

  12. Aggregation, Coarsening, and Phase Transformation in ZnSNanoparticles...

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

    Coarsening, and Phase Transformation in ZnS NanoparticlesStudied by Molecular Dynamics Simulations. Aggregation, Coarsening, and Phase Transformation in ZnS...

  13. EPA Webcast - Creating a Green Infrastructure Plan to Transform...

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

    EPA Webcast - Creating a Green Infrastructure Plan to Transform Your Community EPA Webcast - Creating a Green Infrastructure Plan to Transform Your Community November 18, 2014...

  14. Webinar: Creating a Green Infrastructure Plan to Transform Your...

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

    Webinar: Creating a Green Infrastructure Plan to Transform Your Community Webinar: Creating a Green Infrastructure Plan to Transform Your Community November 18, 2014 3:00PM to...

  15. ARPA-E FY2010 Annual Report Highlights Transformational Projects...

    Energy Savers [EERE]

    Annual Report Highlights Transformational Projects Since Agency's Establishment ARPA-E FY2010 Annual Report Highlights Transformational Projects Since Agency's Establishment...

  16. Toward Sustainable Communities: Transition and Transformations in Environmental Policy

    E-Print Network [OSTI]

    Calloway, Michele

    2001-01-01T23:59:59.000Z

    and Transformations in Environmental Policy By Daniel A.Transformations in Environmental Policy. Cambridge, MA: MITpaper). US$25.00 Environmental policy in the United States

  17. Characterization of Diffraction-Enhanced Imaging

    SciTech Connect (OSTI)

    Kao, T.; Connor, D; Dilmanian, F; Faulconer, L; Liu, T; Parham, C; Pisano, E; Zhong, Z

    2009-01-01T23:59:59.000Z

    Diffraction-enhanced imaging (DEI) is a new x-ray imaging modality that has been shown to enhance contrast between normal and cancerous breast tissues. In this study, diffraction-enhanced imaging in computed tomography (DEI-CT) mode was used to quantitatively characterize the refraction contrasts of the organized structures associated with invasive human breast cancer. Using a high-sensitivity Si (3 3 3) reflection, the individual features of breast cancer, including masses, calcifications and spiculations, were observed. DEI-CT yields 14, 5 and 7 times higher CT numbers and 10, 9 and 6 times higher signal-to-noise ratios (SNR) for masses, calcifications and spiculations, respectively, as compared to conventional CT of the same specimen performed using the same detector, x-ray energy and dose. Furthermore, DEI-CT at ten times lower dose yields better SNR than conventional CT. In light of the recent development of a compact DEI prototype using an x-ray tube as its source, these results, acquired at a clinically relevant x-ray energy for which a pre-clinical DEI prototype currently exists, suggest the potential of clinical implementation of mammography with DEI-CT to provide high-contrast, high-resolution images of breast cancer (Parham 2006 PhD Dissertation University of North Carolina at Chapel Hill).

  18. The Mineralogic Transformation of Ferrihydrite Induced by Heterogeneous Reaction with Bioreduced Anthraquinone Disulfonate (AQDS) and the Role of Phosphate

    SciTech Connect (OSTI)

    Zachara, John M.; Kukkadapu, Ravi K.; Peretyazhko, Tetyana; Bowden, Mark E.; Wang, Chong M.; Kennedy, David W.; Moore, Dean A.; Arey, Bruce W.

    2011-10-12T23:59:59.000Z

    Anthraquinone-2-6-disulfonate (AQDS) enhances electron donor utilization and mineral product crystallization in studies of Fe(III) oxide reductive mineralization by metal reducing bacteria (MRB) through heterogeneous redox reaction. In spite of the strong effect of AQDS in these systems, little information exits on its direct role in reductive mineralization. To provide such insights, bioreduced AQDS (AH2DS; dihydro-anthraquinone) was reacted with a 2-line, Si-substituted ferrihydrite under anoxic conditions at neutral pH in PIPES buffer. Phosphate (P) and bicarbonate (C); common adsorptive oxyanions and media/buffer components known to effect ferrihydrite mineralization; and Fe(II)aq (as a catalytic mineralization agent) were used in comparative experiments. Heterogeneous AH2DS oxidation coupled with Fe(III) reduction occurred within 0.13-1 day, with mineralogic transformation occurring thereafter. The product suite included lepidocrocite, goethite, and/or magnetite, with proportions varing with reductant:oxidant ratio (r:o) and the presence of P or C. Lepidocrocite was the primary product at low r:o in the absence of P or C, with evidence for multiple formation pathways. P inhibited reductive recrystallization, while C promoted goethite formation. Stoichiometric magnetite was the sole product at higher r:o in the absence and presence of P. Lepidocrocite was the primary mineralization product in the Fe(II)aq system, with magnetite observed at near equal amounts when Fe(II) was high [Fe(II)/Fe(III)]=0.5 and P was absent. P had a greater effect on reductive mineralization in the Fe(II)aq system, while AQDS was more effective than Fe(II)aq in promoting magnetite formation. The direct AH2DS-driven reductive reaction pathway produced mineral products that were different from AH2DS-ferrihydite-MRB systems, particularly in presence of P.

  19. ITER physics design guidelines at high aspect ratio

    SciTech Connect (OSTI)

    Uckan, N.A.

    1991-01-01T23:59:59.000Z

    The physics requirements for ITER design are formulated in a set of physics design guidelines. These guidelines, established by the ITER Physics Group during the Conceptual Design Activity (CDA, 1988--90), were based on credible extrapolations of the tokamak physics database as assessed during the CDA, and defined a class of tokamak designs (with plasma current I {approximately}20 MA and aspect ratio A {approximately}2.5--3.5) that meet the ITER objectives. Recent US studies have indicated that there may be significant benefits if the ITER-CDA design point is moved from the low aspect ratio, high current baseline (A = 2.79, I = 22 MA) to a high aspect ratio machine at A {approximately}4, I {approximately}15 MA, especially regarding steady-state, technology-testing performance. To adequately assess the physics and technology testing capability of higher aspect ratio design options, several changes are proposed to the original ITER guidelines to reflect the latest (although limited) developments in physics understanding at higher aspect ratios. The critical issues for higher aspect ratio design options are the uncertainty in scaling of confinement with aspect ratio, the variation of vertical stability with elongation and aspect ratio, plasma shaping requirements, ability to control and maintain plasma current and q-profiles for MHD stability (and volt-second consumption), access for current drive, restrictions on field ripple and divertor plate incident angles, etc. 5 refs., 1 tab.

  20. IEA Workshop 59 Shape and Aspect Ratio Optimization for

    E-Print Network [OSTI]

    IEA Workshop 59 Shape and Aspect Ratio Optimization for High Beta, Steady-State Tokamak SCOPE and aspect ratio is particularly important for achieving high beta and also for the optimization of edge optimization of high beta steady state tokamak including DEMO concept, stability and CD assessment

  1. Net energy ratio of photobiohydrogen generation G. Burgessa

    E-Print Network [OSTI]

    Net energy ratio of photobiohydrogen generation G. Burgessa and J.G. Fernández the energy content, the operational energy inputs, and the net energy ratio (NER) of an industrial tubular photobioreactor used for the photosynthetic production of H2 by microalgae. The calculated H2 output

  2. aspect ratio hydrogen: Topics by E-print Network

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

    aspect ratio hydrogen First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Balanced Aspect Ratio Trees...

  3. THE HDO/H{sub 2}O RATIO IN GAS IN THE INNER REGIONS OF A LOW-MASS PROTOSTAR

    SciTech Connect (OSTI)

    Joergensen, Jes K. [Centre for Star and Planet Formation, Natural History Museum of Denmark, University of Copenhagen, Oester Voldgade 5-7, DK-1350 Copenhagen K. (Denmark); Van Dishoeck, Ewine F., E-mail: jes@snm.ku.d, E-mail: ewine@strw.leidenuniv.n [Leiden Observatory, Leiden University, P.O. Box 9513, NL-2300 RA Leiden (Netherlands)

    2010-12-20T23:59:59.000Z

    The HDO/H{sub 2}O abundance ratio is thought to be a key diagnostic for the evolution of water during the star and planet formation process and thus for its origin on Earth. We here present millimeter-wavelength high angular resolution observations of the deeply embedded protostar NGC 1333-IRAS4B from the Submillimeter Array targeting the 3{sub 12}-2{sub 21} transition of HDO at 225.6 GHz (E{sub u} = 170 K). We do not (or only very tentatively) detect the HDO line toward the central protostar, contrasting the previous prominent detection of a line from another water isotopologue, H{sup 18}{sub 2}O, with similar excitation properties using the IRAM Plateau de Bure Interferometer. The non-detection of the HDO line provides a direct, model-independent, upper limit to the HDO/H{sub 2}O abundance ratio of 6 x 10{sup -4} (3{sigma}) in the warm gas associated with the central protostar. This upper limit suggests that the HDO/H{sub 2}O abundance ratio is not significantly enhanced in the inner {approx}50 AU around the protostar relative to what is seen in comets and Earth's oceans and does not support previous suggestions of a generally enhanced HDO/H{sub 2}O ratio in these systems.

  4. Enhanced heat transfer surface for cast-in-bump-covered cooling surfaces and methods of enhancing heat transfer

    DOE Patents [OSTI]

    Chiu, Rong-Shi Paul (Glenmont, NY); Hasz, Wayne Charles (Pownal, VT); Johnson, Robert Alan (Simpsonville, SC); Lee, Ching-Pang (Cincinnati, OH); Abuaf, Nesim (Lincoln City, OR)

    2002-01-01T23:59:59.000Z

    An annular turbine shroud separates a hot gas path from a cooling plenum containing a cooling medium. Bumps are cast in the surface on the cooling side of the shroud. A surface coating overlies the cooling side surface of the shroud, including the bumps, and contains cooling enhancement material. The surface area ratio of the cooling side of the shroud with the bumps and coating is in excess of a surface area ratio of the cooling side surface with bumps without the coating to afford increased heat transfer across the element relative to the heat transfer across the element without the coating.

  5. Enhanced mercury oxidation

    SciTech Connect (OSTI)

    Gretta, W.J.; Wu, S.; Kikkawa, H. [Hitachi Power Systems America, Basting Ridge, NJ (United States)

    2009-06-15T23:59:59.000Z

    A new catalyst offers a new way to enhance mercury control from bituminous coal-fired power plants. Hitachi has developed an SCR catalyst which satisfies high Hg{sup 0} oxidation and low SO{sub 2} oxidation requirements under high temperatures (716 to 770 F). This triple action catalysts, TRAC can significantly enhance mercury oxidation and reduce or eliminate the need for additional mercury control measures such as activated carbon injection. After laboratory testing, pilot-scale tests confirmed an activity of 1.4-1.7 times higher than that of conventional SCR catalyst. The new catalyst has been successfully applied in a commercial PRB-fired boiler without the need for halogens to be added to the fuel feed or flue gas. 2 figs.

  6. Lignite Fuel Enhancement

    SciTech Connect (OSTI)

    Charles Bullinger

    2006-02-03T23:59:59.000Z

    This 6th quarterly Technical Progress Report for the Lignite Fuel Enhancement Project summarizes activities from October 1st through December 31st of 2005. It also summarizes the subsequent purchasing activity and dryer/process construction. Hypothesis remains the same. We will be able to dry lignite an increment to benefit the performance of and reduce emissions from a coal burning electric power generating station.

  7. FRACTURE STIMULATION IN ENHANCED GEOTHERMAL

    E-Print Network [OSTI]

    Stanford University

    FRACTURE STIMULATION IN ENHANCED GEOTHERMAL SYSTEMS A REPORT SUBMITTED TO THE DEPARTMENT OF ENERGY (Principal Advisor) #12;#12;v Abstract Enhanced Geothermal Systems (EGS) are geothermal reservoirs formed

  8. Automotive Component Product Development Enhancement

    E-Print Network [OSTI]

    of Science in Engineering and Management February 2005 ABSTRACT Automotive industry is facing a tough periodAutomotive Component Product Development Enhancement Through Multi-Attribute System Design Engineering Systems Division #12;Automotive Component Product Development Enhancement Through Multi

  9. Li?0? in Li-0? batteries : catalytic enhancement of electrochemical oxidation and thermophysical transformations

    E-Print Network [OSTI]

    Yao, Koffi Pierre (Koffi Pierre Claver)

    2013-01-01T23:59:59.000Z

    Electrification of transportation in the United States is of importance in reducing dependence on foreign oil and curtailing global warming. However, optimal market penetration of electric vehicles is confronted with the ...

  10. Kernel Maximum Entropy Data Transformation and an Enhanced Spectral Clustering Algorithm

    E-Print Network [OSTI]

    Jensen, R.; Eltoft, T.; Girolami, M.

    Jensen,R. Eltoft,T. Girolami,M. Erdogmus,D. Twentieth Annual Conference on Neural Information Processing Systems - NIPS 2006 MIT Press

  11. Commissioning of the new AGS MMPS transformers

    SciTech Connect (OSTI)

    Bajon,E.; Badea, V. S.; Bannon, M.; Bonati, R.; Marneris, I. M.; Porqueddu, r.; Roser, T.; Sandberg, J.; Savatteri, S.

    2009-05-04T23:59:59.000Z

    The Brookhaven AGS Main Magnet Power Supply (MMPS) is a thyristor control supply rated at 5500 Amps. +/-9000 Volts. The peak magnet power is 50 MWatts. The power supply is fed from a motor/generator manufactured by Siemens. During rectify and invert operation the P Bank power supplies are used. During the flattops the F Bank power supplies are used. The P Bank power supplies are fed from two 23 MVA transformers and the F Bank power supplies are fed from two 5.3 MYA transformers. The fundamental frequency of the F Bank power supplies is 1440 Hz, however the fundamental frequency of the P banks was 720 Hz. It was very important to reduce the ripple during rectify to improve polarized proton operations. For this reason and also because the original transformers were 45 years old we replaced these transformers with new ones and we made the fundamental frequency of both P and F banks 1440 Hz. This paper will highlight the major hurdles that were involved during the installation of the new transformers. It will present waveforms while running at different power levels up to 6MW full load. It will show the transition from the F-Bank power supplies to the P-Banks and also show the improvements in ripple made on the P-Bank power supplies.

  12. MARQUETTE UNIVERSITY Speech Signal Enhancement

    E-Print Network [OSTI]

    Johnson, Michael T.

    MARQUETTE UNIVERSITY Speech Signal Enhancement Using A Microphone Array A THESIS SUBMITTED Reserved #12;iii Preface This thesis describes the design and implementation of a speech enhancement system that uses microphone array beamforming and speech enhancement algorithms applied to a speech signal

  13. THE CAMPAIGN TO TRANSFORM EINSTEIN 2 THE CAMPAIGN TO TRANSFORM EINSTEIN

    E-Print Network [OSTI]

    Yates, Andrew

    THE CAMPAIGN TO TRANSFORM EINSTEIN #12;2 THE CAMPAIGN TO TRANSFORM EINSTEIN #12;ALBERT EINSTEIN COLLEGE OF MEDICINE 1 F or more than five decades, Albert Einstein College of Medicine has responded to the changing landscape of biomedical research with a commitment to improving human health. Einstein's research

  14. Transform-Space View: Performing Spatial Join in the Transform Space

    E-Print Network [OSTI]

    Whang, Kyu-Young

    Transform-Space View: Performing Spatial Join in the Transform Space Using Original-Space Indexes that satisfy a given spatial relationship. In spatial joins using indexes, original-space indexes such as the R-tree are widely used. An original-space index is the one that indexes objects as represented in the original space

  15. Seismic imaging with the generalized Radon transform: A curvelet transform perspective

    E-Print Network [OSTI]

    Smith, Hart F.

    Seismic imaging with the generalized Radon transform: A curvelet transform perspective M V de Hoop1@purdue.edu Abstract. A key challenge in the seismic imaging of reflectors using surface reflection data. Introduction 1.1. Seismic Imaging with Arrays ­ Beyond Current Capabilities Much research in modern

  16. Computing Invariants with Transformers: Experimental Scalability and Accuracy

    E-Print Network [OSTI]

    NSAD 2014 Computing Invariants with Transformers: Experimental Scalability and Accuracy Vivien as transformers, and then propagate the preconditions using the transformers. The second approach is modular the call graph and all the control flow graphs. However, the transformer approach based on polyhedral

  17. Transformations between Composite and Visitor implementations in Java

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Transformations between Composite and Visitor implementations in Java Akram Ajouli ASCOLA (EMN be chained to perform complex structure transformations. This is useful for recovering the initial a refactoring-based round- trip transformation between these two structures and we study how that transformation

  18. On Transforming Spectral Peaks in Voice Conversion Elizabeth Godoy 1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    On Transforming Spectral Peaks in Voice Conversion Elizabeth Godoy 1 , Olivier Rosec1 , Thierry.chonavel@telecom-bretagne.eu Abstract This paper explores the benefits of transforming spectral peaks in voice conversion. First, in examining classic GMM- based transformation with cepstral coefficients, we show that the lack of transformed

  19. Transformation of Meta-Information by Abstract Co-Interpretation

    E-Print Network [OSTI]

    Transformation of Meta-Information by Abstract Co-Interpretation Raimund Kirner and Peter Puschner based on abstract interpretation to transform meta-information in parallel with the transformation. The construction of a correct transformation function for the meta-information can be quite complicated in case

  20. Wavelet Transforms for Vector Fields Using Omnidirectionally Balanced Multiwavelets

    E-Print Network [OSTI]

    Fowler, James E.

    Wavelet Transforms for Vector Fields Using Omnidirectionally Balanced Multiwavelets James E. Fowler, Senior Member, IEEE, and Li Hua, Student Member, IEEE Abstract--Vector wavelet transforms for vector implementation of a vector wavelet transform, namely the application of a scalar transform to each vector

  1. The $?$-deformed Segal-Bargmann transform is a Hall type transform

    E-Print Network [OSTI]

    Stephen Bruce Sontz

    2009-07-13T23:59:59.000Z

    We present an explanation of how the $\\mu$-deformed Segal-Bargmann spaces, that are studied in various articles of the author in collaboration with Angulo, Echevarria and Pita, can be viewed as deserving their name, that is, how they should be considered as a part of Segal-Bargmann analysis. This explanation relates the $\\mu$-deformed Segal-Bargmann transforms to the generalized Segal-Bargmann transforms introduced by B. Hall using heat kernel analysis. All the versions of the $\\mu$-deformed Segal-Bargmann transform can be understood as Hall type transforms. In particular, we define a $\\mu$-deformation of Hall's "Version C" generalized Segal-Bargmann transform which is then shown to be a $\\mu$-deformed convolution with a $\\mu$-deformed heat kernel followed by analytic continuation. Our results are generalizations and analogues of the results of Hall.

  2. Transformations of Logic Programs on Infinite Lists

    E-Print Network [OSTI]

    Pettorossi, Alberto; Senni, Valerio; 10.1017/S1471068410000177

    2010-01-01T23:59:59.000Z

    We consider an extension of logic programs, called \\omega-programs, that can be used to define predicates over infinite lists. \\omega-programs allow us to specify properties of the infinite behavior of reactive systems and, in general, properties of infinite sequences of events. The semantics of \\omega-programs is an extension of the perfect model semantics. We present variants of the familiar unfold/fold rules which can be used for transforming \\omega-programs. We show that these new rules are correct, that is, their application preserves the perfect model semantics. Then we outline a general methodology based on program transformation for verifying properties of \\omega-programs. We demonstrate the power of our transformation-based verification methodology by proving some properties of Buechi automata and \\omega-regular languages.

  3. KSI's Cross Insulated Core Transformer Technology

    SciTech Connect (OSTI)

    Uhmeyer, Uwe [Kaiser Systems, Inc, 126 Sohier Road, Beverly, MA 01915 (United States)

    2009-08-04T23:59:59.000Z

    Cross Insulated Core Transformer (CCT) technology improves on Insulated Core Transformer (ICT) implementations. ICT systems are widely used in very high voltage, high power, power supply systems. In an ICT transformer ferrite core sections are insulated from their neighboring ferrite cores. Flux leakage is present at each of these insulated gaps. The flux loss is raised to the power of stages in the ICT design causing output voltage efficiency to taper off with increasing stages. KSI's CCT technology utilizes a patented technique to compensate the flux loss at each stage of an ICT system. Design equations to calculate the flux compensation capacitor value are presented. CCT provides corona free operation of the HV stack. KSI's CCT based High Voltage power supply systems offer high efficiency operation, high frequency switching, low stored energy and smaller size over comparable ICT systems.

  4. Automatic transformations in the inference process

    SciTech Connect (OSTI)

    Veroff, R. L.

    1980-07-01T23:59:59.000Z

    A technique for incorporating automatic transformations into processes such as the application of inference rules, subsumption, and demodulation provides a mechanism for improving search strategies for theorem proving problems arising from the field of program verification. The incorporation of automatic transformations into the inference process can alter the search space for a given problem, and is particularly useful for problems having broad rather than deep proofs. The technique can also be used to permit the generation of inferences that might otherwise be blocked and to build some commutativity or associativity into the unification process. Appropriate choice of transformations, and new literal clashing and unification algorithms for applying them, showed significant improvement on several real problems according to several distinct criteria. 22 references, 1 figure.

  5. HERCULES: A Pattern Driven Code Transformation System

    SciTech Connect (OSTI)

    Kartsaklis, Christos [ORNL; Hernandez, Oscar R [ORNL; Hsu, Chung-Hsing [ORNL; Ilsche, Thomas [Technische Universitat Dresden; Joubert, Wayne [ORNL; Graham, Richard L [ORNL

    2012-01-01T23:59:59.000Z

    New parallel computers are emerging, but developing efficient scientific code for them remains difficult. A scientist must manage not only the science-domain complexity but also the performance-optimization complexity. HERCULES is a code transformation system designed to help the scientist to separate the two concerns, which improves code maintenance, and facilitates performance optimization. The system combines three technologies, code patterns, transformation scripts and compiler plugins, to provide the scientist with an environment to quickly implement code transformations that suit his needs. Unlike existing code optimization tools, HERCULES is unique in its focus on user-level accessibility. In this paper we discuss the design, implementation and an initial evaluation of HERCULES.

  6. Phase Transformation in Cast Superaustenitic Stainless Steels

    SciTech Connect (OSTI)

    Nathaniel Steven Lee Phillips

    2006-12-12T23:59:59.000Z

    Superaustenitic stainless steels constitute a group of Fe-based alloys that are compositionally balanced to have a purely austenitic matrix and exhibit favorable pitting and crevice corrosion resistant properties and mechanical strength. However, intermetallic precipitates such as sigma and Laves can form during casting or exposure to high-temperature processing, which degrade the corrosion and mechanical properties of the material. The goal of this study was to accurately characterize the solid-solid phase transformations seen in cast superaustenitic stainless steels. Heat treatments were performed to understand the time and temperature ranges for intermetallic phase formations in alloys CN3MN and CK3MCuN. Microstructures were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy and wavelength dispersive spectroscopy (EDS, WDS). The equilibrium microstructures, composed primarily of sigma and Laves within purely austenitic matrices, showed slow transformation kinetics. Factors that determine the extent of transformation, including diffusion, nucleation, and growth, are discussed.

  7. Applications of a fast, continuous wavelet transform

    SciTech Connect (OSTI)

    Dress, W.B.

    1997-02-01T23:59:59.000Z

    A fast, continuous, wavelet transform, based on Shannon`s sampling theorem in frequency space, has been developed for use with continuous mother wavelets and sampled data sets. The method differs from the usual discrete-wavelet approach and the continuous-wavelet transform in that, here, the wavelet is sampled in the frequency domain. Since Shannon`s sampling theorem lets us view the Fourier transform of the data set as a continuous function in frequency space, the continuous nature of the functions is kept up to the point of sampling the scale-translation lattice, so the scale-translation grid used to represent the wavelet transform is independent of the time- domain sampling of the signal under analysis. Computational cost and nonorthogonality aside, the inherent flexibility and shift invariance of the frequency-space wavelets has advantages. The method has been applied to forensic audio reconstruction speaker recognition/identification, and the detection of micromotions of heavy vehicles associated with ballistocardiac impulses originating from occupants` heart beats. Audio reconstruction is aided by selection of desired regions in the 2-D representation of the magnitude of the transformed signal. The inverse transform is applied to ridges and selected regions to reconstruct areas of interest, unencumbered by noise interference lying outside these regions. To separate micromotions imparted to a mass-spring system (e.g., a vehicle) by an occupants beating heart from gross mechanical motions due to wind and traffic vibrations, a continuous frequency-space wavelet, modeled on the frequency content of a canonical ballistocardiogram, was used to analyze time series taken from geophone measurements of vehicle micromotions. By using a family of mother wavelets, such as a set of Gaussian derivatives of various orders, features such as the glottal closing rate and word and phrase segmentation may be extracted from voice data.

  8. aspect ratio silicon: Topics by E-print Network

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

    silicon-nitride hard-mask for high aspect-ratio silicon fins V. Jovanovi, S, Zagreb, Croatia Abstract - A method for using hard-masks to achieve sub- 100 nm patterning of...

  9. Separated Response Function Ratios in Exclusive, Forward ?[superscript ±] Electroproduction

    E-Print Network [OSTI]

    Huber, G.?M.

    The study of exclusive ?[superscript ±] electroproduction on the nucleon, including separation of the various structure functions, is of interest for a number of reasons. The ratio R[subscript L] = ?[?? over L]/?[?+ over ...

  10. Benefits and Drawbacks of Compression Ratio Reduction in PCCI...

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

    effect of compression ratio on performance of light duty diesel operating with PCCI calibration, near EURO6Tier 2 Bin 5 NOx limits. deer08beatrice.pdf More Documents &...

  11. Design studies of low aspect ratio quasi-omnigenous stellarators

    E-Print Network [OSTI]

    Martín-Solís, José Ramón

    optimization principles for the design of a more attractive reactor. These are 3 and 4 field period low aspect] produced low aspect ratio stellarator configurations that had promising features for a reactor (stable

  12. aspect ratio effects: Topics by E-print Network

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

    contribute a major portion of atmospheric aerosol mass loading 5. The estimated global annual Liou, K. N. 2 Effects of aspect ratio of MWNT on the flammability properties of...

  13. Rapid Replication of High Aspect Ratio Molds for UV Embossing

    E-Print Network [OSTI]

    Yan, Yehai

    This paper describes a promising fabrication technique for rapid replication of high aspect ratio microstructured molds for UV embossing. The process involves casting silicone rubber on a microstructured master, replicating ...

  14. Structural transformation of nickel hydroxide films during anodic oxidation

    SciTech Connect (OSTI)

    Crocker, R.W.; Muller, R.H.

    1992-05-01T23:59:59.000Z

    The transformation of anodically formed nickel hydroxide/oxy-hydroxide electrodes has been investigated. A mechanism is proposed for the anodic oxidation reaction, in which the reaction interface between the reduced and oxidized phases of the electrode evolves in a nodular topography that leads to inefficient utilization of the active electrode material. In the proposed nodular transformation model for the anodic oxidation reaction, nickel hydroxide is oxidized to nickel oxy-hydroxide in the region near the metal substrate. Since the nickel oxy-hydroxide is considerably more conductive than the surrounding nickel hydroxide, as further oxidation occurs, nodular features grow rapidly to the film/electrolyte interface. Upon emerging at the electrolyte interface, the reaction boundary between the nickel hydroxide and oxy-hydroxide phases spreads laterally across the film/electrolyte interface, creating an overlayer of nickel oxy-hydroxide and trapping uncharged regions of nickel hydroxide within the film. The nickel oxy-hydroxide overlayer surface facilitates the oxygen evolution side reaction. Scanning tunneling microscopy of the electrode in its charged state revealed evidence of 80 {endash} 100 Angstrom nickel oxy-hydroxide nodules in the nickel hydroxide film. In situ spectroscopic ellipsometer measurements of films held at various constant potentials agree quantitatively with optical models appropriate to the nodular growth and subsequent overgrowth of the nickel oxy-hydroxide phase. A two-dimensional, numerical finite difference model was developed to simulate the current distribution along the phase boundary between the charged and uncharged material. The model was used to explore the effects of the physical parameters that govern the electrode behavior. The ratio of the conductivities of the nickel hydroxide and oxy-hydroxide phases was found to be the dominant parameter in the system.

  15. Enhanced Chemical Cleaning

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011 Strategic Plan Departmentof EnergyPublic LawEnergyEnhanced Chemical Cleaning

  16. Method for calibrating a Fourier transform ion cyclotron resonance mass spectrometer

    DOE Patents [OSTI]

    Smith, Richard D.; Masselon, Christophe D.; Tolmachev, Aleksey

    2003-08-19T23:59:59.000Z

    A method for improving the calibration of a Fourier transform ion cyclotron resonance mass spectrometer wherein the frequency spectrum of a sample has been measured and the frequency (f) and intensity (I) of at least three species having known mass to charge (m/z) ratios and one specie having an unknown (m/z) ratio have been identified. The method uses the known (m/z) ratios, frequencies, and intensities at least three species to calculate coefficients A, B, and C, wherein the mass to charge ratio of a least one of the three species (m/z).sub.i is equal to ##EQU1## wherein f.sub.i is the detected frequency of the specie, G(I.sub.i) is a predetermined function of the intensity of the species, and Q is a predetermined exponent. Using the calculated values for A, B, and C, the mass to charge ratio of the unknown specie (m/z).sub.ii is calculated as the sum of ##EQU2## wherein f.sub.ii is the measured frequency of the unknown specie, and (I.sub.ii) is the measured intensity of the unknown specie.

  17. TOKAMAK REACTOR DESIGNS AS A FUNCTION OF ASPECT RATIO

    E-Print Network [OSTI]

    California at Los Angeles, University of

    GA­A23168 TOKAMAK REACTOR DESIGNS AS A FUNCTION OF ASPECT RATIO by C.P.C. WONG and R.D. STAMBAUGH or reflect those of the United States Government or any agency thereof. #12;GA­A23168 TOKAMAK REACTOR DESIGNS JULY 1999 #12;C.P.C. WONG AND R.D. STAMBAUGH TOKAMAK REACTOR DESIGNS AS A FUNCTION OF ASPECT RATIO

  18. Interpretation of the atmospheric muon charge ratio in MINOS

    E-Print Network [OSTI]

    Philip Schreiner; Maury Goodman

    2007-06-04T23:59:59.000Z

    MINOS is the first large magnetic detector deep underground and is the first to measure the muon charge ratio with high statistics in the region near 1 TeV.\\cite{bib:adamson} An approximate formula for the muon charge ratio can be expressed in terms of $\\epsilon_\\pi$ = 115 GeV, $\\epsilon_K$ = 850 GeV and $\\ec$. The implications for K production in the atmosphere will be discussed.

  19. Noether's Theorem Under the Legendre Transform

    E-Print Network [OSTI]

    Jonathan Herman

    2014-09-29T23:59:59.000Z

    In this paper we demonstrate how the Legendre transform connects the statements of Noether's theorem in Hamiltonian and Lagrangian mechanics. We give precise definitions of symmetries and conserved quantities in both the Hamiltonian and Lagrangian frameworks and discuss why these notions in the Hamiltonian framework are somewhat less rigid. We explore conditions which, when put on these definitions, allow the Legendre transform to set up a one-to-one correspondence between them. We also discuss how to preserve this correspondence when the definitions of symmetries and conserved quantities are less restrictive.

  20. Static magnetic field concentration and enhancement using magnetic materials with positive permeability

    E-Print Network [OSTI]

    Sun, F

    2013-01-01T23:59:59.000Z

    In this paper a novel compressor for static magnetic fields is proposed based on finite embedded transformation optics. When the DC magnetic field passes through the designed device, the magnetic field can be compressed inside the device. After it passes through the device, one can obtain an enhanced static magnetic field behind the output surface of the device (in a free space region). We can also combine our compressor with some other structures to get a higher static magnetic field enhancement in a free space region. In contrast with other devices based on transformation optics for enhancing static magnetic fields, our device is not a closed structure and thus has some special applications (e.g., for controlling magnetic nano-particles for gene and drag delivery). The designed compressor can be constructed by using currently available materials or DC meta-materials with positive permeability. Numerical simulation verifies good performance of our device.

  1. Effect of HVDC component enhancement on the overall system reliability performance

    SciTech Connect (OSTI)

    Kuruganty, S. (Univ. of North Dakota, Grand Forks, ND (United States). Dept. of Electrical Engineering)

    1994-01-01T23:59:59.000Z

    This paper examines several HVDC transmission system component enhancement schemes as they affect the overall system availability using a system model based on a practical system and actual system outage data. A frequency and duration approach is used in modeling the system components such as valve-groups, converter transformers, smoothing reactors, pole, and bipole controls, transmission lines, and the overall system model developed. This model is used to compare the impact on the overall system availability of different methods of HVDC converter enhancement. These methods include the addition of spare converter transformers, spare smoothing reactors, replacement of valves, and increase of converter rating. Finally the costs of typical enhancements are compared with the benefits arising with the improved availability using a cost-benefit analysis.

  2. How soft repulsion enhances the depletion mechanism

    E-Print Network [OSTI]

    Lorenzo Rovigatti; Nicoletta Gnan; Alberto Parola; Emanuela Zaccarelli

    2014-11-12T23:59:59.000Z

    We investigate binary mixtures of large colloids interacting through soft potentials with small, ideal depletants. We show that softness has a dramatic effect on the resulting colloid-colloid effective potential when the depletant-to-colloid size ratio $q$ is small, with significant consequences on the colloidal phase behaviour. We also provide an exact relation that allows us to obtain the effective pair potential for {\\it any} type of colloid-depletant interactions in the case of ideal depletants, without having to rely on complicated and expensive full-mixture simulations. We also show that soft repulsion among depletants further enhances the tendency of colloids to aggregate. Our theoretical and numerical results demonstrate that --- in the limit of small $q$ --- soft mixtures cannot be mapped onto hard systems and hence soft depletion is not a mere extension of the widely used Asakura-Oosawa potential.

  3. Process and apparatus for thermal enhancement

    DOE Patents [OSTI]

    Burrill, Jr., Charles E. (Billerica, MA); Smirlock, Martin E. (Brimfield, MA); Krepchin, Ira P. (Newton Upper Falls, MA)

    1984-06-26T23:59:59.000Z

    Thermal treatment apparatus for downhole deployment comprising a combustion stage with an elongated hot wall combustion zone for the substantially complete combustion of the fuel-air mixture and an ignition zone immediately upstream from the combustion zone in which a mixture of atomized liquid fuel and air at or below stoichiometric ratio is ignited; together with a water injection stage immediately downstream from the combustion zone through which essentially partuculate free high temperature combustion products flow from the combustion zone and into which water is sprayed. The resulting mixture of steam and combustion products is injected into an oil formation for enhancing the speed and effectiveness of reservoir response due to physical, chemical, and/or thermal stimulation interactions.

  4. Observable Proxies For 26 Al Enhancement

    SciTech Connect (OSTI)

    Fryer, Christopher L [Los Alamos National Laboratory; Young, Patrick A [Los Alamos National Laboratory; Ellinger, Carola I [ASU; Arnett, William D [UNIV ARIZONA

    2008-01-01T23:59:59.000Z

    We consider the cospatial production of elements in supernova explosions to find observationally detectable proxies for enhancement of {sup 26}Al in supernova ejecta and stellar systems. Using four progenitors we explore a range of 1D explosions at different energies and an asymmetric 3D explosion. We find that the most reliable indicator of the presence of {sup 26}Al in unmixed ejecta is a very low S/Si ratio ({approx} 0.05). Production of N in O/S/Si-rich regions is also indicative. The biologically important element P is produced at its highest abundance in the same regions. Proxies should be detectable in supernova ejecta with high spatial resolution multi wavelength observations, but the small absolute abundance of material injected into a proto-planetary disk makes detection unlikely in existing or forming stellar/planetary systems.

  5. Contrast-Enhanced Digital Mammography and Angiogenesis

    SciTech Connect (OSTI)

    Rosado-Mendez, I.; Palma, B. A. [Instituto de Fisica, Universidad Nacional Autonoma de Mexico (Mexico); UNAM Medical Physics Program, Mexico City (Mexico); Villasenor, Y. [Instituto Nacional de Cancerologia (INCan) (Mexico); Benitez-Bribiesca, L. [Centro Medico Nacional Siglo XXI (Mexico); Brandan, M. E. [Instituto de Fisica, Universidad Nacional Autonoma de Mexico (Mexico)

    2007-11-26T23:59:59.000Z

    Angiogenesis could be a means for pouring contrast media around tumors. In this work, optimization of radiological parameters for contrast-enhanced subtraction techniques in mammography has been performed. A modification of Lemacks' analytical formalism was implemented to model the X-ray absorption in the breast with contrast medium and detection by a digital image receptor. Preliminary results of signal-to-noise ratio analysis show the advantage of subtracting two images taken at different energies, one prior and one posterior to the injection of contrast medium. Preliminary experimental results using a custom-made phantom have shown good agreement with calculations. A proposal is presented for the clinical application of the optimized technique, which aims at finding correlations between angiogenesis indicators and dynamic variables of contrast medium uptake.

  6. Broadband Quantum Efficiency Enhancement in High Index Nanowires Resonators

    E-Print Network [OSTI]

    Yang, Yiming; Hyatt, Steven; Yu, Dong

    2015-01-01T23:59:59.000Z

    Light trapping in sub-wavelength semiconductor nanowires (NWs) offers a promising approach to simultaneously reducing material consumption and enhancing photovoltaic performance. Nevertheless, the absorption efficiency of a NW, defined by the ratio of optical absorption cross section to the NW diameter, lingers around 1 in existing NW photonic devices, and the absorption enhancement suffers from a narrow spectral width. Here, we show that the absorption efficiency can be significantly improved in NWs with higher refractive indices, by an experimental observation of up to 350% external quantum efficiency (EQE) in lead sulfide (PbS) NW resonators, a 3-fold increase compared to Si NWs. Furthermore, broadband absorption enhancement is achieved in single tapered NWs, where light of various wavelengths is absorbed at segments with different diameters analogous to a tandem solar cell. Overall, the single NW Schottky junction solar cells benefit from optical resonance, near bandgap open circuit voltage, and long mino...

  7. On the inverse transform of Laplace transforms that contain (products of) the parabolic cylinder function

    E-Print Network [OSTI]

    Dirk Veestraeten

    2015-05-21T23:59:59.000Z

    The Laplace transforms of the transition probability density and distribution functions for the Ornstein-Uhlenbeck process contain the product of two parabolic cylinder functions, namely D_{v}(x)D_{v}(y) and D_{v}(x)D_{v-1}(y), respectively. The inverse transforms of these products have as yet not been documented. However, the transition density and distribution functions can be obtained by alternatively applying Doob's transform to the Kolmogorov equation and casting the problem in terms of Brownian motion. Linking the resulting transition density and distribution functions to their Laplace transforms then specifies the inverse transforms to the aforementioned products of parabolic cylinder functions. These two results, the recurrence relation of the parabolic cylinder function and the properties of the Laplace transform then enable the calculation of inverse transforms also for countless other combinations in the orders of the parabolic cylinder functions such as D_{v}(x)D_{v-2}(y), D_{v+1}(x)D_{v-1}(y) and D_{v}(x)D_{v-3}(y).

  8. Denoise in the pseudopolar grid Fourier space using exact inverse pseudopolar Fourier transform

    E-Print Network [OSTI]

    Wei, Fan Jun

    2015-01-01T23:59:59.000Z

    In this paper I show a matrix method to calculate the exact inverse pseudopolar grid Fourier transform, and use this transform to do noise removals in the k space of pseudopolar grids. I apply the Gaussian filter to this pseudopolar grid and find the advantages of the noise removals are very excellent by using pseudopolar grid, and finally I show the Cartesian grid denoise for comparisons. The results present the signal to noise ratio and the variance are much better when doing noise removals in the pseudopolar grid than the Cartesian grid. The noise removals of pseudopolar grid or Cartesian grid are both in the k space, and all these noises are added in the real space.

  9. Operational Equivalence of Graph Transformation Systems

    E-Print Network [OSTI]

    Sarna-Starosta, Beata

    Operational Equivalence of Graph Transformation Systems Frank Raiser and Thom Fr¨uhwirth Faculty. With the growing number of GTS- based applications the comparison of operational equivalence of two GTS becomes an important area of research. This work introduces a notion of operational equivalence for graph

  10. A SIMPLEX-BASED PROJECTIVE TRANSFORM ESTIMATOR

    E-Print Network [OSTI]

    Robinson, John A.

    A SIMPLEX-BASED PROJECTIVE TRANSFORM ESTIMATOR J A Robinson University of York, UK. INTRODUCTION. THE SAM ESTIMATOR The estimator to be described here is called Simplex-Adapted Mesh (SAM). It has two to in the name ­ a sparse sam- ple mesh and the Nelder-Mead simplex ­ and is more novel. For convenience I use

  11. Staring 2-D hadamard transform spectral imager

    DOE Patents [OSTI]

    Gentry, Stephen M. (Albuquerque, NM); Wehlburg, Christine M. (Albuquerque, NM); Wehlburg, Joseph C. (Albuquerque, NM); Smith, Mark W. (Albuquerque, NM); Smith, Jody L. (Albuquerque, NM)

    2006-02-07T23:59:59.000Z

    A staring imaging system inputs a 2D spatial image containing multi-frequency spectral information. This image is encoded in one dimension of the image with a cyclic Hadamarid S-matrix. The resulting image is detecting with a spatial 2D detector; and a computer applies a Hadamard transform to recover the encoded image.

  12. Lorentz transformations with arbitrary line of motion

    E-Print Network [OSTI]

    Chandru Iyer; G. M. Prabhu

    2008-09-18T23:59:59.000Z

    Sometimes it becomes a matter of natural choice for an observer (A) that he prefers a coordinate system of two-dimensional spatial x-y coordinates from which he observes another observer (B) who is moving at a uniform speed along a line of motion, which is not collinear with As chosen x or y axis. It becomes necessary in such cases to develop Lorentz transformations where the line of motion is not aligned with either the x or the y-axis. In this paper we develop these transformations and show that under such transformations, two orthogonal systems (in their respective frames) appear non-orthogonal to each other. We also illustrate the usefulness of the transformation by applying it to three problems including the rod-slot problem. The derivation has been done before using vector algebra. Such derivations assume that the axes of K and K-prime are parallel. Our method uses matrix algebra and shows that the axes of K and K-prime do not remain parallel, and in fact K and K-prime which are properly orthogonal are observed to be non-orthogonal by K-prime and K respectively. http://www.iop.org/EJ/abstract/0143-0807/28/2/004

  13. Full bridge converter Transformers and isolated converters

    E-Print Network [OSTI]

    Knobloch,Jürgen

    Full bridge converter Transformers and isolated converters Most DC power supplies have the following requirements: 1. Regulated output voltage Solved by a large capacitor at the output, and feedback control. 2. High power factor PFC - discussed previously. 3. Isolation 4. Multiple outputs Isolated

  14. Transformer Recharging with Alpha Channeling in Tokamaks

    SciTech Connect (OSTI)

    N.J. Fisch

    2009-12-21T23:59:59.000Z

    Transformer recharging with lower hybrid waves in tokamaks can give low average auxiliary power if the resistivity is kept high enough during the radio frequency (rf) recharging stage. At the same time, operation in the hot ion mode via alpha channeling increases the effective fusion reactivity. This paper will address the extent to which these two large cost saving steps are compatible. __________________________________________________

  15. Transforming the Museum SPARK | THINK | MAKE

    E-Print Network [OSTI]

    Aalberts, Daniel P.

    Transforming the Museum SPARK | THINK | MAKE #12;WILLIAMS COLLEGE MUSEUM OF ART 1 Museums. Because of its varied collections and its breadth and nimbleness of forms, the college museum of the museum's 9th decade of history. As we developed the vision for its future we sought to both leverage its

  16. Transforming IT University Health Care System

    E-Print Network [OSTI]

    Transforming IT University Health Care System improves patient care with enterprise grid storage infrastructure. Solution IBM helped University Health Care System (UHCS) develop a plan for using technology of storage University Health Care System is a not- for-profit community hospital network that serves 25

  17. HTS Power Transformers Presented to the

    E-Print Network [OSTI]

    1 HTS Power Transformers Presented to the 2004 DOE Peer Review Committee For the WES flexibility. Allows operation from 20 K to 77 K permitting full system optimization. Best available conductor/SP/EE/ORNL Team By S.W. Schwenterly E.F. Pleva D.W. Hazelton Oak Ridge Waukesha SuperPower, Inc. National

  18. 2010 Solar Market Transformation Analysis and Tools

    Broader source: Energy.gov [DOE]

    This document is an overview describing the solar analysis and tool development projects funded by the DOE Market Transformation team for fiscal year 2010. These quick snapshots are intended to give you a basic look at the scope, timeline, and expected deliverables for each project.

  19. Transformation texture of allotriomorphic ferrite in steel

    E-Print Network [OSTI]

    Cambridge, University of

    Transformation texture of allotriomorphic ferrite in steel D. W. Kim1 , R. S. Qin1 and H. K. D. H into that of the product is mathematically defined. This is not the case when the ferrite forms by a reconstructive mechanism. The allotriomorphic ferrite nucleates heterogeneously at austenite grain boundaries, and although

  20. IMAGE COMPRESSION USING SPLINE BASED WAVELET TRANSFORMS

    E-Print Network [OSTI]

    Averbuch, Amir

    known codec. Keywords: Sample, edited book Introduction The three fundamental building blocks with one well known codec. 0.1. Wavelet Based Image Coders Wavelet transforms provide very good energy of partitioning, aggregation and conditional coding­ PACC. Following these concepts, the data object emerging from

  1. Capturing Database Transformations for Big Data Analytics

    E-Print Network [OSTI]

    Ordonez, Carlos

    of Houston DBMS #12;Organization · Introduction · Classification · Program · Case Study · Conclusions DBMS Transformations to Build Data Sets for Data Mining, Data & Knowledge Engineering (DKE), 2014, Elsevier. DBMS #12 for this project might remain in the database, using resources. DBMS #12;Motivation: Saving Work · Different users

  2. Deforestation: Transforming programs to eliminate trees

    E-Print Network [OSTI]

    Wadler, Philip

    Deforestation: Transforming programs to eliminate trees Philip Wadler University of Glasgow \\Lambda---called the Deforestation Algorithm. A form of function definition that uses no intermediate trees is characterised, called and the Deforestation Algorithm are presented in three steps. The first step presents ``pure'' treeless form in a first

  3. First principles calculations for analysis martensitic transformations

    SciTech Connect (OSTI)

    Harmon, B.N.; Zhao, G.L.; Ho, K.M.; Chan, C.T.; Ye, Y.Y.; Ding, Y.; Zhang, B.L.

    1993-10-01T23:59:59.000Z

    The change in crystal energy is calculated for atomic displacements corresponding to phonons, elastic shears, and lattice transformations. Anomalies in the phonon dispersion curves of NiAl and NiTi are analyzed and recent calculations for TiPd alloys are presented.

  4. Accelerating the transformation of power systems

    E-Print Network [OSTI]

    Accelerating the transformation of power systems Introduction Flexibility of operation--the ability of a power system to respond to change in demand and supply--is a characteristic of all power systems. Flexibility is especially prized in twenty-first century power systems, with higher levels of grid

  5. Transformation and regeneration of Texas cotton

    E-Print Network [OSTI]

    Luo, Jinhua

    2000-01-01T23:59:59.000Z

    contained genes associated with pathogen resistance (PR genes): osmotin (PR-5) and a basic PR-1 in pXBOP, and lox1 in pJMA4. Plants were transformed using the shoot apex/Agrobacterium method (US Pat. # 5,164,310; Smith et al., 1992) developed earlier...

  6. Early diagenetic transformations of peat Original research

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Early diagenetic transformations of peat Original research Organic matter sources and decay;KEY WORDS: bioindicators - carbohydrates - labile organic matter - peat botanical composition to the fate of organic matter (OM) in the underlying peat. Our aims were to determine how moisture conditions

  7. Contact Anosov flows and the FBI transform

    E-Print Network [OSTI]

    Tsujii, Masato

    2010-01-01T23:59:59.000Z

    This paper is about spectral properties of transfer operators for contact Anosov flows. The main result gives the essential spectral radius of the transfer operators acting on the so-called anisotropic Sobolev space exactly in terms of dynamical exponents. Also we provide a simplified proof by using the FBI transform.

  8. Information retrieval system utilizing wavelet transform

    DOE Patents [OSTI]

    Brewster, Mary E. (Kennewick, WA); Miller, Nancy E. (Kennewick, WA)

    2000-01-01T23:59:59.000Z

    A method for automatically partitioning an unstructured electronically formatted natural language document into its sub-topic structure. Specifically, the document is converted to an electronic signal and a wavelet transform is then performed on the signal. The resultant signal may then be used to graphically display and interact with the sub-topic structure of the document.

  9. Birck Nanotechnology Center Transforming Light with Metamaterials

    E-Print Network [OSTI]

    Fiebig, Peter

    Birck Nanotechnology Center Transforming Light with Metamaterials (with A.V. Kildishev, W. Cai, V.P. Drachev, S. Xiao, U. Chettiar) OUTLINE Birck Nanotechnology Center Vladimir M. Shalaev Purdue University;Birck Nanotechnology Center Meta-Magnetics: from 10GHz to 200THz Terahertz magnetism a) Yen, et al. ~ 1

  10. Canonoid and Poissonoid Transformations, Symmetries and BiHamiltonian Structures

    E-Print Network [OSTI]

    Giovanni Rastelli; Manuele Santoprete

    2015-02-25T23:59:59.000Z

    We give a characterization of linear canonoid transformations on symplectic manifolds and we use it to generate biHamiltonian structures for some mechanical systems. Utilizing this characterization we also study the behavior of the harmonic oscillator under canonoid transformations. We present a description of canonoid transformations due to E.T. Whittaker, and we show that it leads, in a natural way, to the modern, coordinate-independent definition of canonoid transformations. We also generalize canonoid transformations to Poisson manifolds by introducing Poissonoid transformations. We give examples of such transformations for Euler's equations of the rigid body (on $\\mathcal{so}^\\ast (3) $ and $ so^\\ast (4)$) and for an integrable case of Kirchhoff's equations for the motion of a rigid body immersed in an ideal fluid. We study the relationship between biHamiltonian structures and Poissonoid transformations for these examples. We analyze the link between Poissonoid transformations, constants of motion, and symmetries.

  11. Voluntary Initiative: Partnering to Enhance Program Capacity...

    Energy Savers [EERE]

    to Enhance Program Capacity Better Buildings Residential Network Program Sustainability Peer Exchange Call Series: Voluntary Initiative: Partnering to Enhance Program...

  12. Enhancing Railroad Hazardous Materials Transportation Safety...

    Office of Environmental Management (EM)

    Enhancing Railroad Hazardous Materials Transportation Safety Rail Routing Enhancing Railroad Hazardous Materials Transportation Safety Rail Routing Presentation made by Kevin...

  13. Atomic Ordering Enhanced Electrocatalytic Activity of Nanoalloys...

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

    Ordering Enhanced Electrocatalytic Activity of Nanoalloys for Oxygen Reduction Reaction. Atomic Ordering Enhanced Electrocatalytic Activity of Nanoalloys for Oxygen Reduction...

  14. Probing Nanoscale Surface Enhanced Raman Scattering Fluctuation...

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

    Nanoscale Surface Enhanced Raman Scattering Fluctuation Dynamics using Correalted AFM and Confocal Ultramicroscopy. Probing Nanoscale Surface Enhanced Raman Scattering Fluctuation...

  15. Seismic Fracture Characterization Methods for Enhanced Geothermal...

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

    Seismic Fracture Characterization Methods for Enhanced Geothermal Systems Seismic Fracture Characterization Methods for Enhanced Geothermal Systems Project objective: Make Seismic...

  16. Abstract--This paper presents a model of large air gap transformer composed of two E cores. Approach is based on the

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    to electric vehicle battery charge", IEEE Trans. Ind. Electron., vol. 56, pp. 2140-2149, June 2009. [2] O. H gap with magnetic core. Sizing of such components requires knowledge of inductive parameters equivalent circuit composed of leakage inductance (Lf), magnetizing inductance (Lm) and transformer ratio (m

  17. Plasmonic enhanced ultrafast switch.

    SciTech Connect (OSTI)

    Subramania,Ganapathi Subramanian; Reno, John Louis; Passmore, Brandon Scott; Harris, Tom.; Shaner, Eric Arthur; Barrick, Todd A.

    2009-09-01T23:59:59.000Z

    Ultrafast electronic switches fabricated from defective material have been used for several decades in order to produce picosecond electrical transients and TeraHertz radiation. Due to the ultrashort recombination time in the photoconductor materials used, these switches are inefficient and are ultimately limited by the amount of optical power that can be applied to the switch before self-destruction. The goal of this work is to create ultrafast (sub-picosecond response) photoconductive switches on GaAs that are enhanced through plasmonic coupling structures. Here, the plasmonic coupler primarily plays the role of being a radiation condenser which will cause carriers to be generated adjacent to metallic electrodes where they can more efficiently be collected.

  18. Enhanced oil recovery system

    DOE Patents [OSTI]

    Goldsberry, Fred L. (Spring, TX)

    1989-01-01T23:59:59.000Z

    All energy resources available from a geopressured geothermal reservoir are used for the production of pipeline quality gas using a high pressure separator/heat exchanger and a membrane separator, and recovering waste gas from both the membrane separator and a low pressure separator in tandem with the high pressure separator for use in enhanced oil recovery, or in powering a gas engine and turbine set. Liquid hydrocarbons are skimmed off the top of geothermal brine in the low pressure separator. High pressure brine from the geothermal well is used to drive a turbine/generator set before recovering waste gas in the first separator. Another turbine/generator set is provided in a supercritical binary power plant that uses propane as a working fluid in a closed cycle, and uses exhaust heat from the combustion engine and geothermal energy of the brine in the separator/heat exchanger to heat the propane.

  19. Enhanced Geothermal Systems Technologies

    Broader source: Energy.gov [DOE]

    Geothermal Energy an?d the Enhanced Geothermal Systems Concept The Navy 1 geothermal power plant near Coso Hot Springs, California, is applying EGS technology. Heat is naturally present everywhere in the earth. For all intents and purposes, heat from the earth is inexhaustible. Water is not nearly as ubiquitous in the earth as heat. Most aqueous fluids are derived from surface waters that have percolated into the earth along permeable pathways such as faults. Permeability is a measure of the ease of fluid flow through rock. The permeability of rock results from pores, fractures, joints, faults, and other openings which allow fluids to move. High permeability implies that fluids can flow rapidly through the rock. Permeability and, subsequently, the amount of fluids tend to decrease with depth as openings in the rocks compress from the weight of the overburden.

  20. Photon enhanced thermionic emission

    DOE Patents [OSTI]

    Schwede, Jared; Melosh, Nicholas; Shen, Zhixun

    2014-10-07T23:59:59.000Z

    Photon Enhanced Thermionic Emission (PETE) is exploited to provide improved efficiency for radiant energy conversion. A hot (greater than 200.degree. C.) semiconductor cathode is illuminated such that it emits electrons. Because the cathode is hot, significantly more electrons are emitted than would be emitted from a room temperature (or colder) cathode under the same illumination conditions. As a result of this increased electron emission, the energy conversion efficiency can be significantly increased relative to a conventional photovoltaic device. In PETE, the cathode electrons can be (and typically are) thermalized with respect to the cathode. As a result, PETE does not rely on emission of non-thermalized electrons, and is significantly easier to implement than hot-carrier emission approaches.

  1. Methods for detection and characterization of signals in noisy data with the Hilbert-Huang Transform

    E-Print Network [OSTI]

    Alexander Stroeer; John K. Cannizzo; Jordan B. Camp; Nicolas Gagarin

    2009-03-26T23:59:59.000Z

    The Hilbert-Huang Transform is a novel, adaptive approach to time series analysis that does not make assumptions about the data form. Its adaptive, local character allows the decomposition of non-stationary signals with hightime-frequency resolution but also renders it susceptible to degradation from noise. We show that complementing the HHT with techniques such as zero-phase filtering, kernel density estimation and Fourier analysis allows it to be used effectively to detect and characterize signals with low signal to noise ratio.

  2. Laboratory Investigation of Contact Freezing and the Aerosol to Ice Crystal Transformation Process

    SciTech Connect (OSTI)

    Shaw, Raymond A. [Michigan Technological University

    2014-10-28T23:59:59.000Z

    This project has been focused on the following objectives: 1. Investigations of the physical processes governing immersion versus contact nucleation, specifically surface-induced crystallization; 2. Development of a quadrupole particle trap with full thermodynamic control over the temperature range 0 to –40 °C and precisely controlled water vapor saturation ratios for continuous, single-particle measurement of the aerosol to ice crystal transformation process for realistic ice nuclei; 3. Understanding the role of ice nucleation in determining the microphysical properties of mixed-phase clouds, within a framework that allows bridging between laboratory and field measurements.

  3. Backside configured surface plasmonic enhancement

    SciTech Connect (OSTI)

    Gu, Guiru; Lu, Xuejun, E-mail: xuejun-lu@uml.edu [Department of Electrical and Computer Engineering, University of Massachusetts Lowell, One University Avenue, Lowell, MA 01854 (United States); Vaillancourt, Jarrod [Applied NanoFemto Technologies, LLC, 181 Stedman St. 2, Lowell, MA 01851 (United States)

    2014-03-31T23:59:59.000Z

    In this work, we fabricated, measured and compared the quantum dots infrared photodetector enhancement by the top- and backside- configured plasmonic structures. The backside configured plasmonic structure can provide much higher device performance enhancement. Furthermore, the excitation of the surface plasmonic waves by the top- and backside- configured plasmonic structures was analyzed. Detailed simulation results of the electric field at different wavelength from top illumination and backside illumination were provided. The stronger electric field from the backside illumination attributed to the higher enhancement.

  4. Single beam Fourier transform digital holographic quantitative phase microscopy

    SciTech Connect (OSTI)

    Anand, A., E-mail: arun-nair-in@yahoo.com; Chhaniwal, V. K.; Mahajan, S.; Trivedi, V. [Optics Laboratory, Applied Physics Department, Faculty of Technology and Engineering, M.S. University of Baroda, Vadodara 390001 (India)] [Optics Laboratory, Applied Physics Department, Faculty of Technology and Engineering, M.S. University of Baroda, Vadodara 390001 (India); Faridian, A.; Pedrini, G.; Osten, W. [Institut für Technische Optik, Universität Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart (Germany)] [Institut für Technische Optik, Universität Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart (Germany); Dubey, S. K. [Siemens Technology and Services Pvt. Ltd, Corporate Technology—Research and Technology Centre, Bangalore 560100 (India)] [Siemens Technology and Services Pvt. Ltd, Corporate Technology—Research and Technology Centre, Bangalore 560100 (India); Javidi, B. [Department of Electrical and Computer Engineering, U-4157, University of Connecticut, Storrs, Connecticut 06269-2157 (United States)] [Department of Electrical and Computer Engineering, U-4157, University of Connecticut, Storrs, Connecticut 06269-2157 (United States)

    2014-03-10T23:59:59.000Z

    Quantitative phase contrast microscopy reveals thickness or height information of a biological or technical micro-object under investigation. The information obtained from this process provides a means to study their dynamics. Digital holographic (DH) microscopy is one of the most used, state of the art single-shot quantitative techniques for three dimensional imaging of living cells. Conventional off axis DH microscopy directly provides phase contrast images of the objects. However, this process requires two separate beams and their ratio adjustment for high contrast interference fringes. Also the use of two separate beams may make the system more vulnerable to vibrations. Single beam techniques can overcome these hurdles while remaining compact as well. Here, we describe the development of a single beam DH microscope providing whole field imaging of micro-objects. A hologram of the magnified object projected on to a diffuser co-located with a pinhole is recorded with the use of a commercially available diode laser and an arrayed sensor. A Fourier transform of the recorded hologram directly yields the complex amplitude at the image plane. The method proposed was investigated using various phase objects. It was also used to image the dynamics of human red blood cells in which sub-micrometer level thickness variation were measurable.

  5. Ratio of Pion Kaon Production in Proton Carbon Interactions

    SciTech Connect (OSTI)

    Lebedev, Andrey V.; /Harvard U.

    2007-05-01T23:59:59.000Z

    The ratio of pion-kaon production by 120 GeV/c protons incident on carbon target is presented. The data was recorded with the Main Injector Particle Production experiment at Fermi National Accelerator Laboratory. Production ratios of K{sup +}/{pi}{sup +}, K{sup -}/{pi}{sup -}, K{sup -}/K{sup +}, and {pi}{sup -}/{pi}{sup +} are measured in 24 bins in longitudinal momentum from 20 to 90 GeV/c and transverse momentum up to 2 GeV/c. The measurement is compared to existing data sets, particle production Monte Carlo results from FLUKA-06, parametrization of proton-beryllium data at 400/450 GeV/c, and ratios measured by the MINOS experiment on the NuMI target.

  6. Hall viscosity to entropy ratio in higher derivative theories

    E-Print Network [OSTI]

    Dibakar Roychowdhury

    2014-09-18T23:59:59.000Z

    In this paper based on the basic principles of gauge/gravity duality we compute the hall viscosity to entropy ratio in the presence of various higher derivative corrections to the dual gravitational description embedded in an asymptotically $ AdS_{4} $ space time. As the first step of our analysis, considering the back reaction we impose higher derivative corrections to the abelian gauge sector of the theory where we notice that the ratio indeed gets corrected at the leading order in the coupling. Considering the probe limit as a special case we compute this leading order correction over the fixed background of the charged black brane solution. Finally we consider higher derivative ($ R^{2} $) correction to the gravity sector of the theory where we notice that the above ratio might get corrected at the sixth derivative level.

  7. Enhanced Control Installations.pdf

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

    correctness. Title: Individual Permit, High Priority Sites, Examples of Enhanced Control Installations, Poster, Individual Permit for Storm Water, NPDES Permit No. NM0030759...

  8. Crossover from capillary fingering to compact invasion for two-phase drainage with stable viscosity ratios

    SciTech Connect (OSTI)

    Ferer, M.V.; Bromhal, G.S.; Smith, D.H

    2007-02-01T23:59:59.000Z

    Motivated by a wide range of applications from enhanced oil recovery to carbon dioxide sequestration, we have developed a two-dimensional, pore-level model of immiscible drainage, incorporating viscous, capillary, and gravitational effects. This model has been validated quantitatively, in the very different limits of zero viscosity ratio and zero capillary number; flow patterns from modeling agree well with experiment. For a range of stable viscosity ratios (?injected/?displaced 1), we have increased the capillary number, Nc, and studied the way in which the flows deviate from capillary fingering (the fractal flow of invasion percolation) and become compact for realistic capillary numbers. Results exhibiting this crossover from capillary fingering to compact invasion are presented for the average position of the injected fluid, the fluid–fluid interface, the saturation and fractional flow profiles, and the relative permeabilities. The agreement between our results and earlier theoretical predictions [Blunt M, King MJ, Scher H. Simulation and theory of two-phase flow in porous media. Phys Rev A 1992;46:7680–99; Lenormand R. Flow through porous media: limits of fractal patterns. Proc Roy Soc A 1989;423:159–68; Wilkinson D. Percolation effects in immiscible displacement. Phys Rev A 1986;34:1380–90; Xu B, Yortsos YC, Salin D. Invasion Percolation with viscous forces. Phys Rev E 1998;57:739–51] supports the validity of these general theoretical arguments, which were independent of the details of the porous media in both two and three dimensions.

  9. 36 AUGUST | 2011 EnhancEd TurbinE

    E-Print Network [OSTI]

    Kusiak, Andrew

    36 AUGUST | 2011 EnhancEd TurbinE PErformancE moniToring comPonEnTs of wind TurbinEs are affected by asymmetric loads, variable wind speeds, and se- vere weather conditions which cause wind turbines to change their states. A typical wind turbine under- goes various states during its daily operations. The wind turbine

  10. Particle acceleration in thick parallel shocks with high compression ratio

    E-Print Network [OSTI]

    Joni J. P. Virtanen; Rami Vainio

    2005-06-06T23:59:59.000Z

    We report studies on first-order Fermi acceleration in parallel modified shock waves with a large scattering center compression ratio expected from turbulence transmission models. Using a Monte Carlo technique we have modeled particle acceleration in shocks with a velocity ranging from nonrelativistic to ultrarelativistic and a thickness extending from nearly steplike to very wide structures exceeding the particle diffusion length by orders of magnitude. The nonrelativistic diffusion approximation is found to be surprisingly accurate in predicting the spectral index of a thick shock with large compression ratio even in the cases involving relativistic shock speeds.

  11. Prediction of heptanes-plus equilibrium ratios from empirical correlations

    E-Print Network [OSTI]

    McKenna, Martin James

    1988-01-01T23:59:59.000Z

    6590 305 247 0. 862 low 600 3225 158 149 0. 787 8055 313 212 0. 841 low sOV 2375 127 108 0. 746 TABLE 3-PHYS ICAL AND CRITICAL PROPERTIES Component methane ethane propane i-butane n-butane i-pentane n-pentane hexane (1b... using only one property ? critical temperature- to correlate equilibrium ratios. Campbell stated that for a fixed temperature and pressure, the equilibrium ratios of a mixture in v the equation apor-liquid equilibrium can be represented by log K...

  12. Estimate of the triton asymptotic D to S ratio

    SciTech Connect (OSTI)

    Frederico, T.; Adhikari, S.K.; Hussein, M.S.

    1988-01-01T23:59:59.000Z

    The role of the deuteron asymptotic D to S normalization ratio eta/sup d/ in the calculation of triton observables is emphasized both within a simple model and in an exact numerical calculation. We suggest a new correlation among eta/sup t//eta/sup d/ and E/sub t/ in dynamical three nucleon calculations, where eta/sup t/ is the triton asymptotic D to S ratio and E/sub t/ is the triton binding energy. Studying this correlation we obtained eta/sup t//eta/sup d/ = 1.68 +- 0.04. .AE

  13. Perfusion measurement with Rubidium 81 to Krypton 81m ratio

    E-Print Network [OSTI]

    Beasley, Charles Ward

    1982-01-01T23:59:59.000Z

    WRITE & II!FV ~ 26) FQRM4T(' REPLACE OR AF'PING OAT* FILET (Rr(4&)'I 'rfrA1) READ( IDEV r 22 & IANS IF ( (IANS, AND. '377) . EQ, '122) ICNTR=O WRITE& IDEV r 145) FORMAT(' USE OLD SEITINGSr &N&; 'rf !A1) RE*D(IDEVr22) IANS IOLD=O IF? IANS. AND. '377... TO EQUI LI!3RIUM AND POINTS TAKEN FROM THE OBSERVED (4) RATIO DECLINE REAL TIME RB-81/KR-81M RATIO VERSUS PHANTOM FLOW 17 19 10 SYMBOLIC FORMAT QF RECTILINEAR PHANTOM SCANS, SHOWING THE RELATIVE DISTRIBUTION OF RB-81 AND KR-81M AT DIFFERENT FLOW...

  14. Proposed Giaever transformer to probe the pseudogap phase of the cuprates

    SciTech Connect (OSTI)

    Levchenko, Alex; Norman, Michael R

    2011-01-01T23:59:59.000Z

    We develop a theory of the rectification effect in a double-layer system where both layers are superconductors or one of the layers is a normal metal. The Coulomb interaction is assumed to provide the dominant coupling between the layers. We find that superconducting fluctuations strongly enhance the drag conductivity, with rectification most pronounced when both layers are superconductors. In view of their distinct dependence on temperature near {Tc} and layer separation, drag measurements based on a Giaever transformer could distinguish whether rectification occurs due to fluctuating pairs or inductively coupled fluctuating vortices.

  15. Liquid chromatography/Fourier transform IR spectrometry interface flow cell

    DOE Patents [OSTI]

    Johnson, Charles C. (Fairfield, OH); Taylor, Larry T. (Blacksburg, VA)

    1986-01-01T23:59:59.000Z

    A zero dead volume (ZDV) microbore high performance liquid chromatography (.mu.HPLC)/Fourier transform infrared (FTIR) interface flow cell includes an IR transparent crystal having a small diameter bore therein through which a sample liquid is passed. The interface flow cell further includes a metal holder in combination with a pair of inner, compressible seals for directly coupling the thus configured spectrometric flow cell to the outlet of a .mu.HPLC column end fitting to minimize the transfer volume of the effluents exiting the .mu.HPLC column which exhibit excellent flow characteristics due to the essentially unencumbered, open-flow design. The IR beam passes transverse to the sample flow through the circular bore within the IR transparent crystal, which is preferably comprised of potassium bromide (KBr) or calcium fluoride (CaF.sub.2), so as to minimize interference patterns and vignetting encountered in conventional parallel-plate IR cells. The long IR beam pathlength and lensing effect of the circular cross-section of the sample volume in combination with the refractive index differences between the solvent and the transparent crystal serve to focus the IR beam in enhancing sample detection sensitivity by an order of magnitude.

  16. Liquid chromatography/Fourier transform IR spectrometry interface flow cell

    DOE Patents [OSTI]

    Johnson, C.C.; Taylor, L.T.

    1985-01-04T23:59:59.000Z

    A zero dead volume (ZDV) microbore high performance liquid chromatography (..mu.. HPLC)/Fourier transform infrared (FTIR) interface flow cell includes an IR transparent crystal having a small diameter bore therein through which a sample liquid is passed. The interface flow cell further includes a metal holder in combination with a pair of inner, compressible seals for directly coupling the thus configured spectrometric flow cell to the outlet of a ..mu.. HPLC column end fitting to minimize the transfer volume of the effluents exiting the ..mu.. HPLC column which exhibit excellent flow characteristics due to the essentially unencumbered, open-flow design. The IR beam passes transverse to the sample flow through the circular bore within the IR transparent crystal, which is preferably comprised of potassium bromide (KBr) or calcium fluoride (CaF/sub 2/), so as to minimize interference patterns and vignetting encountered in conventional parallel-plate IR cells. The long IR beam pathlength and lensing effect of the circular cross-section of the sample volume in combination with the refractive index differences between the solvent and the transparent crystal serve to focus the IR beam in enhancing sample detection sensitivity by an order of magnitude.

  17. Lignite Fuel Enhancement

    SciTech Connect (OSTI)

    Charles Bullinger; Nenad Sarunac

    2010-03-31T23:59:59.000Z

    Pulverized coal power plants which fire lignites and other low-rank high-moisture coals generally operate with reduced efficiencies and increased stack emissions due to the impacts of high fuel moisture on stack heat loss and pulverizer and fan power. A process that uses plant waste heat sources to evaporate a portion of the fuel moisture from the lignite feedstock in a moving bed fluidized bed dryer (FBD) was developed in the U.S. by a team led by Great River Energy (GRE). The demonstration was conducted with Department of Energy (DOE) funding under DOE Award Number DE-FC26-04NT41763. The objectives of GRE's Lignite Fuel Enhancement project were to demonstrate reduction in lignite moisture content by using heat rejected from the power plant, apply technology at full scale at Coal Creek Station (CCS), and commercialize it. The Coal Creek Project has involved several stages, beginning with lignite drying tests in a laboratory-scale FBD at the Energy Research Center (ERC) and development of theoretical models for predicting dryer performance. Using results from these early stage research efforts, GRE built a 2 ton/hour pilot-scale dryer, and a 75 ton/hour prototype drying system at Coal Creek Station. Operated over a range of drying conditions, the results from the pilot-scale and prototype-scale dryers confirmed the performance of the basic dryer design concept and provided the knowledge base needed to scale the process up to commercial size. Phase 2 of the GRE's Lignite Fuel Enhancement project included design, construction and integration of a full-scale commercial coal drying system (four FBDs per unit) with Coal Creek Units 1 and 2 heat sources and coal handling system. Two series of controlled tests were conducted at Coal Creek Unit 1 with wet and dried lignite to determine effect of dried lignite on unit performance and emissions. Wet lignite was fired during the first, wet baseline, test series conducted in September 2009. The second test series was performed in March/April 2010 after commercial coal drying system was commissioned. Preliminary tests with dried coal were performed in March/April 2010. During the test Unit 2 was in outage and, therefore, test unit (Unit 1) was carrying entire station load and, also, supplying all auxiliary steam extractions. This resulted in higher station service, lower gross power output, and higher turbine cycle heat rate. Although, some of these effects could be corrected out, this would introduce uncertainty in calculated unit performance and effect of dried lignite on unit performance. Baseline tests with dried coal are planned for second half of 2010 when both units at Coal Creek will be in service to establish baseline performance with dried coal and determine effect of coal drying on unit performance. Application of GRE's coal drying technology will significantly enhance the value of lignite as a fuel in electrical power generation power plants. Although existing lignite power plants are designed to burn wet lignite, the reduction in moisture content will increase efficiency, reduce pollution and CO{sub 2} emissions, and improve plant economics. Furthermore, the efficiency of ultra supercritical units burning high-moisture coals will be improved significantly by using dried coal as a fuel. To date, Great River Energy has had 63 confidentiality agreements signed by vendors and suppliers of equipment and 15 utilities. GRE has had agreements signed from companies in Canada, Australia, China, India, Indonesia, and Europe.

  18. Unanticipated Effects of Epoxy Impregnating Transformers

    SciTech Connect (OSTI)

    SANCHEZ,ROBERT O.; ARCHER,WENDEL E.

    2000-08-23T23:59:59.000Z

    Many Sandia components for military applications are designed for a 20-year life. In order to determine if magnetic components meet that requirement, the parts are subjected to selected destructive tests. This paper reviews the re-design of a power transformer and the tests required to prove-in the re-design. The re-design included replacing the Epon 828/Mica/methylenedianiline (curing agent Z) epoxy encapsulant with a recent Sandia National Laboratory (SNL) developed epoxy encapsulant. The new encapsulant reduces the Environmental Safety and Health (ES and H) hazards. Life testing of this re-designed transformer generated failures; an open secondary winding. An experimental program to determine the cause of the broken wires and an improved design to eliminate the problem was executed. This design weakness was corrected by reverting to the hazardous epoxy system.

  19. Cloaking a sensor via transformation optics

    E-Print Network [OSTI]

    Allan Greenleaf; Yaroslav Kurylev; Matti Lassas; Gunther Uhlmann

    2010-11-14T23:59:59.000Z

    It is generally believed that transformation optics based cloaking, besides rendering the cloaked region invisible to detection by scattering of incident waves, also shields the region from those same waves. We demonstrate a coupling between the cloaked and uncloaked regions, exposing a difference between cloaking for rays and waves. Interior resonances allow this coupling to be amplified, and careful choice of parameters leads to effective cloaks with degraded shielding. As one application, we describe how to use transformation optics to hide sensors in the cloaked region and yet enable the sensors to efficiently measure waves incident on the exterior of the cloak, an effect similar to the plasmon based approach of Alu' and Engheta.

  20. Two-dimensional fourier transform spectrometer

    DOE Patents [OSTI]

    DeFlores, Lauren; Tokmakoff, Andrei

    2013-09-03T23:59:59.000Z

    The present invention relates to a system and methods for acquiring two-dimensional Fourier transform (2D FT) spectra. Overlap of a collinear pulse pair and probe induce a molecular response which is collected by spectral dispersion of the signal modulated probe beam. Simultaneous collection of the molecular response, pulse timing and characteristics permit real time phasing and rapid acquisition of spectra. Full spectra are acquired as a function of pulse pair timings and numerically transformed to achieve the full frequency-frequency spectrum. This method demonstrates the ability to acquire information on molecular dynamics, couplings and structure in a simple apparatus. Multi-dimensional methods can be used for diagnostic and analytical measurements in the biological, biomedical, and chemical fields.

  1. The Funk Transform as a Penrose Transform T.N. Bailey M.G. Eastwood A.R. Gover L.J. Mason

    E-Print Network [OSTI]

    Gover, Rod

    The Funk Transform as a Penrose Transform T.N. Bailey M.G. Eastwood A.R. Gover L.J. Mason December 2, 1999 Abstract The Funk transform is the integral transform from the space of smooth even this transform as a limit in a certain sense of the Penrose transform from C P 2 to C P \\Lambda 2 . We exploit

  2. Transformation of gram positive bacteria by sonoporation

    DOE Patents [OSTI]

    Yang, Yunfeng; Li, Yongchao

    2014-03-11T23:59:59.000Z

    The present invention provides a sonoporation-based method that can be universally applied for delivery of compounds into Gram positive bacteria. Gram positive bacteria which can be transformed by sonoporation include, for example, Bacillus, Streptococcus, Acetobacterium, and Clostridium. Compounds which can be delivered into Gram positive bacteria via sonoporation include nucleic acids (DNA or RNA), proteins, lipids, carbohydrates, viruses, small organic and inorganic molecules, and nano-particles.

  3. Renormalization Group Transformation for the Wave Function

    E-Print Network [OSTI]

    Hanae El Hattab; Janos Polonyi

    1998-03-26T23:59:59.000Z

    The problem considered here is the determination of the hamiltonian of a first quantized nonrelativistic particle by the help of some measurements of the location with a finite resolution. The resulting hamiltonian depends on the resolution of the measuring device. This dependence is reproduced by the help of a blocking transformation on the wave function. The systems with quadratic hamiltonian are studied in details. The representation of the renormalization group in the space of observables is identified.

  4. Transformation Strain and Crystallographic Texture in Steels

    E-Print Network [OSTI]

    Kundu, Saurabh

    Transformation Strain and Crystallographic Texture in Steels By Saurabh Kundu Darwin College, Cambridge University of Cambridge Department of Materials Science and Metallurgy Pembroke Street, Cambridge CB2 3QZ A dissertation submitted for the degree... , Crystallographic tex- ture of stress-affected bainite, Proceedings of the Royal Society of London A, (submitted). Saurabh Kundu March, 2007 ii Acknowledgments I am grateful to the EPSRC, UK and TATA STEEL, India for funding this project. I would also like to thank...

  5. Residential market transformation: National and regional indicators

    SciTech Connect (OSTI)

    Van Wie McGrory, Laura L.; McNamara, Maureen; Suozzo, Margaret

    2000-06-01T23:59:59.000Z

    A variety of programs are underway to address market barriers to the adoption of energy-efficient residential technologies and practices. Most are administered by utilities, states, or regions that rely on the Energy Star as a consistent platform for program marketing and messaging. This paper reviews regional and national market transformation activities for three key residential end-uses -- air conditioning, clothes washing, and lighting -- characterizing current and ongoing programs; reporting on progress; identifying market indicators; and discussing implications.

  6. An Imaging Fourier Transform Spectrometer for NGST

    E-Print Network [OSTI]

    James R. Graham

    1999-07-18T23:59:59.000Z

    Due to its simultaneous deep imaging and integral field spectroscopic capability, an Imaging Fourier Transform Spectrograph (IFTS) is ideally suited to the Next Generation Space Telescope (NGST) mission, and offers opportunities for tremendous scientific return in many fields of astrophysical inquiry. We describe the operation and quantify the advantages of an IFTS for space applications. The conceptual design of the Integral Field Infrared Spectrograph (IFIRS) is a wide field (5'.3 x 5'.3) four-port imaging Michelson interferometer.

  7. Perspective Transformation: Analyzing the Outcomes of International Education

    E-Print Network [OSTI]

    Tacey, Krista Diane

    2012-10-19T23:59:59.000Z

    . These data were used as the foundation for the second phase of the study, which examined the catalysts for, and the process of, transformation through the lens of transformative learning theory. Almost all respondents indicated that the international...

  8. Rice Transformation as a Means to Study Gene Expression

    E-Print Network [OSTI]

    Jiang, Yiming

    2010-10-12T23:59:59.000Z

    An exceptionally effective transformation procedure has been established by using class I embryo-derived rice callus. Every treated callus clump yielded multiple independently transformed plants (average 40 plantlets). Analysis of genomic DNA blots...

  9. Laser and Electrical Current Induced Phase Transformation of...

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

    Current Induced Phase Transformation of In2Se3 Semiconductor thin film on Si(111) . Laser and Electrical Current Induced Phase Transformation of In2Se3 Semiconductor thin film...

  10. Beyond 2020--Strategies and Costs for Transforming the European

    E-Print Network [OSTI]

    Beyond 2020--Strategies and Costs for Transforming the European Energy System* Brigitte Knopf, Yen-Heng FOR TRANSFORMING THE EUROPEAN ENERGY SYSTEM BRIGITTE KNOPF*,§§ , YEN-HENG HENRY CHEN , ENRICA DE CIAN , HANNAH

  11. 1-D Transforms for the Motion Compensation Residual

    E-Print Network [OSTI]

    Kamisli, Fatih

    Transforms used in image coding are also commonly used to compress prediction residuals in video coding. Prediction residuals have different spatial characteristics from images, and it is useful to develop transforms that ...

  12. Probing the size and environment induced phase transformation...

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

    the size and environment induced phase transformation in CdSe quantum dots. Probing the size and environment induced phase transformation in CdSe quantum dots. Abstract: The...

  13. The role of assessment in a lean transformation

    E-Print Network [OSTI]

    Shan, Raymond S. (Raymond Shing)

    2008-01-01T23:59:59.000Z

    When starting the journey to become a Lean company, companies commonly face the problem of understanding how to manage a Lean transformation. Often times, the first step in managing a Lean transformation is to understand ...

  14. Understanding urban housing transformations : a case study of Bhogal, India

    E-Print Network [OSTI]

    Benjamin, Solomon J., 1960-

    1985-01-01T23:59:59.000Z

    This thesis attempts to describe dwelling transformations in the case of Bhogal, New Delhi. It is hoped to clarify the links between socio-economic forces and their resultant impact on physical form, through its transformation. ...

  15. Intelligent Transformer Monitoring System Utilizing Neuro-Fuzzy

    E-Print Network [OSTI]

    Intelligent Transformer Monitoring System Utilizing Neuro-Fuzzy Technique Approach Intelligent Center Intelligent Transformer Monitoring System Utilizing Neuro-Fuzzy Technique Approach Final Project neuro-fuzzy techniques is used for non-linear system identification, output estimation, and fault

  16. Rice Transformation as a Means to Study Gene Expression 

    E-Print Network [OSTI]

    Jiang, Yiming

    2010-10-12T23:59:59.000Z

    An exceptionally effective transformation procedure has been established by using class I embryo-derived rice callus. Every treated callus clump yielded multiple independently transformed plants (average 40 plantlets). ...

  17. Accretion of dust grains as a possible origin of metal-poor stars with low alpha/Fe ratios

    E-Print Network [OSTI]

    Shigeyama, T; Shigeyama, Toshikazu; Tsujimoto, Takuji

    2003-01-01T23:59:59.000Z

    The origin of low alpha/Fe ratios in some metal-poor stars, so called low-alpha stars, is discussed. It is found that most of low-alpha stars in the Galaxy are on the main-sequence. This strongly suggests that these stars suffered from external pollution. It is also found that the abundance ratios Zn/Fe of low-alpha stars both in the Galaxy and in dwarf spheroidal galaxies are lower than the average value of Galactic halo stars whereas damped Ly alpha absorbers have higher ratios. This implies that some low-alpha stars accreted matter depleted from gas onto dust grains. To explain the features in these low-alpha stars, we have proposed that metal-poor stars harboring planetary systems are the origin of these low-alpha stars. Stars engulfing a small fraction of planetesimals enhance the surface content of Fe to exhibit low alpha/Fe ratios on their surfaces while they are on the main-sequence, because dwarfs have shallow surface convection zones where the engulfed matter is mixed. After the stars leave the main...

  18. Phase Transformations in Binary Colloidal Monolayers

    E-Print Network [OSTI]

    Ye Yang; Lin Fu; Catherine Marcoux; Joshua E. S. Socolar; Patrick Charbonneau; Benjamin B. Yellen

    2015-02-10T23:59:59.000Z

    Phase transformations can be difficult to characterize at the microscopic level due to the inability to directly observe individual atomic motions. Model colloidal systems, by contrast, permit the direct observation of individual particle dynamics and of collective rearrangements, which allows for real-space characterization of phase transitions. Here, we study a quasi-two-dimensional, binary colloidal alloy that exhibits liquid-solid and solid-solid phase transitions, focusing on the kinetics of a diffusionless transformation between two crystal phases. Experiments are conducted on a monolayer of magnetic and nonmagnetic spheres suspended in a thin layer of ferrofluid and exposed to a tunable magnetic field. A theoretical model of hard spheres with point dipoles at their centers is used to guide the choice of experimental parameters and characterize the underlying materials physics. When the applied field is normal to the fluid layer, a checkerboard crystal forms; when the angle between the field and the normal is sufficiently large, a striped crystal assembles. As the field is slowly tilted away from the normal, we find that the transformation pathway between the two phases depends strongly on crystal orientation, field strength, and degree of confinement of the monolayer. In some cases, the pathway occurs by smooth magnetostrictive shear, while in others it involves the sudden formation of martensitic plates.

  19. Enhanced local tomography

    DOE Patents [OSTI]

    Katsevich, Alexander J. (Los Alamos, NM); Ramm, Alexander G. (Manhattan, KS)

    1996-01-01T23:59:59.000Z

    Local tomography is enhanced to determine the location and value of a discontinuity between a first internal density of an object and a second density of a region within the object. A beam of radiation is directed in a predetermined pattern through the region of the object containing the discontinuity. Relative attenuation data of the beam is determined within the predetermined pattern having a first data component that includes attenuation data through the region. In a first method for evaluating the value of the discontinuity, the relative attenuation data is inputted to a local tomography function .function..sub..LAMBDA. to define the location S of the density discontinuity. The asymptotic behavior of .function..sub..LAMBDA. is determined in a neighborhood of S, and the value for the discontinuity is estimated from the asymptotic behavior of .function..sub..LAMBDA.. In a second method for evaluating the value of the discontinuity, a gradient value for a mollified local tomography function .gradient..function..sub..LAMBDA..epsilon. (x.sub.ij) is determined along the discontinuity; and the value of the jump of the density across the discontinuity curve (or surface) S is estimated from the gradient values.

  20. Enhanced Micellar Catalysis LDRD.

    SciTech Connect (OSTI)

    Betty, Rita G.; Tucker, Mark David; Taggart, Gretchen; Kinnan, Mark K.; Glen, Crystal Chanea; Rivera, Danielle; Sanchez, Andres; Alam, Todd Michael

    2012-12-01T23:59:59.000Z

    The primary goals of the Enhanced Micellar Catalysis project were to gain an understanding of the micellar environment of DF-200, or similar liquid CBW surfactant-based decontaminants, as well as characterize the aerosolized DF-200 droplet distribution and droplet chemistry under baseline ITW rotary atomization conditions. Micellar characterization of limited surfactant solutions was performed externally through the collection and measurement of Small Angle X-Ray Scattering (SAXS) images and Cryo-Transmission Electron Microscopy (cryo-TEM) images. Micellar characterization was performed externally at the University of Minnesota's Characterization Facility Center, and at the Argonne National Laboratory Advanced Photon Source facility. A micellar diffusion study was conducted internally at Sandia to measure diffusion constants of surfactants over a concentration range, to estimate the effective micelle diameter, to determine the impact of individual components to the micellar environment in solution, and the impact of combined components to surfactant phase behavior. Aerosolized DF-200 sprays were characterized for particle size and distribution and limited chemical composition. Evaporation rates of aerosolized DF-200 sprays were estimated under a set of baseline ITW nozzle test system parameters.

  1. Enhanced membrane gas separations

    SciTech Connect (OSTI)

    Prasad, R.

    1993-07-13T23:59:59.000Z

    An improved membrane gas separation process is described comprising: (a) passing a feed gas stream to the non-permeate side of a membrane system adapted for the passage of purge gas on the permeate side thereof, and for the passage of the feed gas stream in a counter current flow pattern relative to the flow of purge gas on the permeate side thereof, said membrane system being capable of selectively permeating a fast permeating component from said feed gas, at a feed gas pressure at or above atmospheric pressure; (b) passing purge gas to the permeate side of the membrane system in counter current flow to the flow of said feed gas stream in order to facilitate carrying away of said fast permeating component from the surface of the membrane and maintaining the driving force for removal of the fast permeating component through the membrane from the feed gas stream, said permeate side of the membrane being maintained at a subatmospheric pressure within the range of from about 0.1 to about 5 psia by vacuum pump means; (c) recovering a product gas stream from the non-permeate side of the membrane; and (d) discharging purge gas and the fast permeating component that has permeated the membrane from the permeate side of the membrane, whereby the vacuum conditions maintained on the permeate side of the membrane by said vacuum pump means enhance the efficiency of the gas separation operation, thereby reducing the overall energy requirements thereof.

  2. aerosol ratio test: Topics by E-print Network

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

    aerosol ratio test First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Effect of mineral dust aerosol...

  3. Generalized solar load ratio correlation for direct gain buildings

    SciTech Connect (OSTI)

    Wray, W.O.; Best, E.D.

    1986-01-01T23:59:59.000Z

    A generalized solar load ratio correlation has been developed for direct gain buildings by generating relationships between the correlation parameters and two fundamental design parameters. The first design parameter is the steady state conductance of the solar aperture, U/sub c/. The second is the effective heat capacity of the solar zone, EHC.

  4. NOTE / NOTE Sex ratio variation in gynodioecious species of

    E-Print Network [OSTI]

    Dorken, Marcel

    NOTE / NOTE Sex ratio variation in gynodioecious species of Echium endemic to the Canary Islands Marcel E. Dorken Abstract: Species of Echium from the Canary Islands represent an adaptive radiation fertility of females and hermaphrodites were de- tected. Key words: Canary Islands, Echium, island radiation

  5. The Next Generation Isotope Ratio MS DELTA V Advantage

    E-Print Network [OSTI]

    Lachniet, Matthew S.

    on front panel - All pumps inside - Low noise design #12;T The Next Generation Isotope Ratio MS More than with intrinsic alignment of all ion optical components - Integrated signal amplifiers and digitizers - All ion - Comprehensive set of automated diagnostics · Compact and user-friendly design - Small footprint - Space for on

  6. Oxygen isotopic ratios in intermediate-mass red giants

    E-Print Network [OSTI]

    Lebzelter, Thomas; Hinkle, Kenneth; Nowotny, Walter; Aringer, Bernhard

    2015-01-01T23:59:59.000Z

    Context. The abundances of the three main isotopes of oxygen are altered in the course of the CNO-cycle. When the first dredge-up mixes the burning products to the surface, the nucleosynthesis processes can be probed by measuring oxygen isotopic ratios. Aims. By measuring 16O/17O and 16O/18O in red giants of known mass we compare the isotope ratios with predictions from stellar and galactic evolution modelling. Methods. Oxygen isotopic ratios were derived from the K-band spectra of six red giants. The sample red giants are open cluster members with known masses of between 1.8 and 4.5 Msun . The abundance determination employs synthetic spectra calculated with the COMARCS code. The effect of uncertainties in the nuclear reaction rates, the mixing length, and of a change in the initial abundance of the oxygen isotopes was determined by a set of nucleosynthesis and mixing models using the FUNS code. Results. The observed 16O/17O ratios are in good agreement with the model results, even if the measured values do ...

  7. RpA ratio: total shadowing due to running coupling

    E-Print Network [OSTI]

    E. Iancu; D. N. Triantafyllopoulos

    2007-07-02T23:59:59.000Z

    We predict that the RpA ratio at the most forward rapidities to be measured at LHC should be strongly suppressed, close to "total shadowing'' (RpA = A^(-1/3)), as a consequence of running coupling effects in the nonlinear QCD evolution.

  8. Prediction-Based Compression Ratio Boundaries for Medical Images

    E-Print Network [OSTI]

    Qi, Xiaojun

    Prediction-Based Compression Ratio Boundaries for Medical Images Xiaojun Qi Computer Science present prediction-based image compression techniques take advantage of either intra- or inter function. The prediction-based compression technique has been applied on some magnetic resonance (MR) brain

  9. Allowable pillar to diameter ratio for strategic petroleum reserve caverns.

    SciTech Connect (OSTI)

    Ehgartner, Brian L.; Park, Byoung Yoon

    2011-05-01T23:59:59.000Z

    This report compiles 3-D finite element analyses performed to evaluate the stability of Strategic Petroleum Reserve (SPR) caverns over multiple leach cycles. When oil is withdrawn from a cavern in salt using freshwater, the cavern enlarges. As a result, the pillar separating caverns in the SPR fields is reduced over time due to usage of the reserve. The enlarged cavern diameters and smaller pillars reduce underground stability. Advances in geomechanics modeling enable the allowable pillar to diameter ratio (P/D) to be defined. Prior to such modeling capabilities, the allowable P/D was established as 1.78 based on some very limited experience in other cavern fields. While appropriate for 1980, the ratio conservatively limits the allowable number of oil drawdowns and hence limits the overall utility and life of the SPR cavern field. Analyses from all four cavern fields are evaluated along with operating experience gained over the past 30 years to define a new P/D for the reserve. A new ratio of 1.0 is recommended. This ratio is applicable only to existing SPR caverns.

  10. Negative Poisson's Ratio Behavior Induced by an Elastic Instability

    E-Print Network [OSTI]

    Reis, Pedro Miguel

    's ratio, which is approximately 0.5 for rubber and 0.3 for glass and steel. Materials with a negative] prostheses,[3] piezocomposites with optimal performance[4] and foams with superior damping and acoustic foams with reentrant struc- tures,[1] hierarchical laminates,[12] polymeric and metallic foams,[13

  11. Slow light enhanced photon echoes

    E-Print Network [OSTI]

    J. Hahn; B. S. Ham

    2009-09-28T23:59:59.000Z

    We report a slow light-enhanced photon echo method, whose retrieval efficiency is two orders of magnitude higher than that of conventional photon echoes. The enhanced photon echo efficiency is due to lengthened interaction time given by ultraslow group velocity.

  12. Market Transformation: Solar Energy Technologies Program (SETP) (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-10-01T23:59:59.000Z

    Fact sheet summarizing the goals and activities of the DOE Solar Energy Technologies Program efforts within its market transformation subprogram.

  13. The Proton Form Factor Ratio Measurements at Jefferson Lab

    SciTech Connect (OSTI)

    Punjabi, Vina A. [Norfolk State University, Norfolk, VA (United States); Perdrisat, Charles F. [William and Mary College, Williamsburg, VA (United States)

    2014-03-01T23:59:59.000Z

    The ratio of the proton form factors, G{sub Ep}/G{sub Mp}, has been measured from Q{sup 2} of 0.5 GeV{sup 2} to 8.5 GeV{sup 2}, at the Jefferson Laboratory, using the polarization transfer method. This ratio is extracted directly from the measured ratio of the transverse and longitudinal polarization components of the recoiling proton in elastic electron-proton scattering. The discovery that the proton form factor ratio measured in these experiments decreases approximately linearly with four-momentum transfer, Q{sup 2}, for values above #25;~1 GeV{sup 2}, is one of the most significant results to come out of JLab. These results have had a large impact on progress in hadronic physics; and have required a significant rethinking of nucleon structure. The increasingly common use of the double-polarization technique to measure the nucleon form factors, in the last 15 years, has resulted in a dramatic improvement of the quality of all four nucleon electromagnetic form factors, G{sub Ep}, G{sub Mp}, G{sub En} and G{sub Mn}. There is an approved experiment at JLab, GEP(V), to continue the ratio measurements to 12 GeV{sup 2}. A dedicated experimental setup, the Super Bigbite Spectrometer (SBS), will be built for this purpose. It will be equipped with a focal plane polarimeter to measure the polarization of the recoil protons. The scattered electrons will be detected in an electromagnetic calorimeter. In this presentation, I will review the status of the proton elastic electromagnetic form factors and discuss a number of theoretical approaches to describe nucleon form factors.

  14. MAGNESIUM ISOTOPE RATIOS IN {omega} CENTAURI RED GIANTS

    SciTech Connect (OSTI)

    Da Costa, G. S.; Norris, John E.; Yong, David [Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 0200 (Australia)

    2013-05-20T23:59:59.000Z

    We have used the high-resolution observations obtained at the Anglo-Australian Telescope with Ultra-High Resolution Facility (R {approx} 100,000) and at Gemini-S with b-HROS (R {approx} 150,000) to determine magnesium isotope ratios for seven {omega} Cen red giants that cover a range in iron abundance from [Fe/H] = -1.78 to -0.78 dex, and for two red giants in M4 (NGC 6121). The {omega} Cen stars sample both the ''primordial'' (i.e., O-rich, Na- and Al-poor) and the ''extreme'' (O-depleted, Na- and Al-rich) populations in the cluster. The primordial population stars in both {omega} Cen and M4 show ({sup 25}Mg, {sup 26}Mg)/{sup 24}Mg isotopic ratios that are consistent with those found for the primordial population in other globular clusters with similar [Fe/H] values. The isotopic ratios for the {omega} Cen extreme stars are also consistent with those for extreme population stars in other clusters. The results for the extreme population stars studied indicate that the {sup 26}Mg/{sup 24}Mg ratio is highest at intermediate metallicities ([Fe/H] < -1.4 dex), and for the highest [Al/Fe] values. Further, the relative abundance of {sup 26}Mg in the extreme population stars is notably higher than that of {sup 25}Mg, in contrast to model predictions. The {sup 25}Mg/{sup 24}Mg isotopic ratio in fact does not show any obvious dependence on either [Fe/H] or [Al/Fe] nor, intriguingly, any obvious difference between the primordial and extreme population stars.

  15. OXYGEN ISOTOPIC RATIOS IN COOL R CORONAE BOREALIS STARS

    SciTech Connect (OSTI)

    Garcia-Hernandez, D. A. [Instituto de Astrofisica de Canarias (IAC), C/Via Lactea s/n, 38200 La Laguna, Tenerife (Spain); Lambert, David L. [W. J. McDonald Observatory, University of Texas at Austin. 1 University Station, C1400. Austin, TX 78712-0259 (United States); Rao, N. Kameswara [Indian Institute of Astrophysics, Bangalore 560 034 (India); Hinkle, Ken H. [National Optical Astronomy Observatory (NOAO), Tucson, AZ 85726 (United States); Eriksson, Kjell, E-mail: agarcia@iac.e, E-mail: dll@astro.as.utexas.ed, E-mail: nkrao@iiap.res.i, E-mail: hinkle@noao.ed, E-mail: Kjell.Eriksson@astro.uu.s [Department of Physics and Astronomy, Uppsala University, Box 515, 75120 Uppsala (Sweden)

    2010-05-01T23:59:59.000Z

    We investigate the relationship between R Coronae Borealis (RCB) stars and hydrogen-deficient carbon (HdC) stars by measuring precise {sup 16}O/{sup 18}O ratios for five cool RCB stars. The {sup 16}O/{sup 18}O ratios are derived by spectrum synthesis from high-resolution (R {approx} 50, 000) K-band spectra. Lower limits to the {sup 16}O/{sup 17}O and {sup 14}N/{sup 15}N ratios as well as Na and S abundances (when possible) are also given. RCB stars in our sample generally display less {sup 18}O than HdC stars-the derived {sup 16}O/{sup 18}O ratios range from 3 to 20. The only exception is the RCB star WX CrA, which seems to be an HdC-like star with {sup 16}O/{sup 18}O = 0.3. Our result of a higher {sup 16}O/{sup 18}O ratio for the RCB stars must be accounted for by a theory of the formation and evolution of HdC and RCB stars. We speculate that a late dredge-up of products of He burning, principally {sup 12}C and {sup 16}O, may convert an {sup 18}O-rich HdC star into an {sup 18}O-poor RCB star as the H-deficient star begins its final evolution from a cool supergiant to the top of the white dwarf cooling track.

  16. Transformative Learning Purple Paper Truman State University Summer 2011

    E-Print Network [OSTI]

    Gering, Jon C.

    of reflection and critical thinking. Transformative learning, however, focuses specifically on critical self learning involves deep learning but not all deep learning results in transformation. Given that the focus into student participation in transformative learning. Truman Portfolio Results Summary: 86% of gradua

  17. Transformation Series as an Ideographic Character Concept Taran Granta,

    E-Print Network [OSTI]

    Grant, Taran

    Transformation Series as an Ideographic Character Concept Taran Granta, * and Arnold G. Klugeb be conceptualized as ``transformation series'', a proposal that is firmly grounded in evolutionary theory and consistent with the method of inferring transformation events as evidence of phylogenetic propinquity

  18. A Transformed Lagged Ensemble Forecasting Technique for Increasing Ensemble Size

    E-Print Network [OSTI]

    Hansens, Jim

    A Transformed Lagged Ensemble Forecasting Technique for Increasing Ensemble Size Andrew. R.Lawrence@ecmwf.int #12;Abstract An ensemble-based data assimilation approach is used to transform old en- semble. The impact of the transformations are propagated for- ward in time over the ensemble's forecast period

  19. MAP TRANSFORMATIONS OF GEOGRAPHIC SPACE WALDO RUDOLPH TOBLER

    E-Print Network [OSTI]

    Tobler, Waldo

    MAP TRANSFORMATIONS OF GEOGRAPHIC SPACE by WALDO RUDOLPH TOBLER A thesis submitted in partial. If the transformations were dependent only on a factor of proportionality, as in the conversion from miles to kilometers relations, just as isometric transformations of a spherical surface to a plane are not possible. Maps

  20. Anthropogenic transformation of the biomes, 1700 to 2000

    E-Print Network [OSTI]

    Ellis, Erle C.

    RESEARCH PAPER Anthropogenic transformation of the biomes, 1700 to 2000 Erle C. Ellis1 *, Kees, Canada ABSTRACT Aim To map and characterize anthropogenic transformation of the terrestrial biosphere anthromes, less than 20% seminatural and only a quarter left wild. Anthropogenic transformation

  1. Transformation of spatial and perturbation derivatives of travel time

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Transformation of spatial and perturbation derivatives of travel time at a general interface and perturbation parameters. We derive the explicit equations for transforming these travel­time derivatives Hamiltonian function and are applicable to the transformation of travel­time derivatives in both isotropic

  2. Model Transformation with Hierarchical Discrete-Event Control

    E-Print Network [OSTI]

    Model Transformation with Hierarchical Discrete- Event Control Thomas Huining Feng Electrical permission. #12;Model Transformation with Hierarchical Discrete-Event Control by Huining Feng B.S. (Nanjing Date Date University of California, Berkeley Spring 2009 #12;Model Transformation with Hierarchical

  3. Finite anticanonical transformations in field-antifield formalism

    E-Print Network [OSTI]

    Igor A. Batalin; Peter M. Lavrov; Igor V. Tyutin

    2015-02-19T23:59:59.000Z

    We study the role of arbitrary (finite) anticanonical transformations in the field-antifield formalism, and the gauge-fixing procedure based on the use of these transformations. Properties of generating functionals of Green functions subjected to finite anticanonical transformations are considered.

  4. Transforming the advanced lab: Part I -Learning goals Benjamin Zwickl

    E-Print Network [OSTI]

    Colorado at Boulder, University of

    Transforming the advanced lab: Part I - Learning goals Benjamin Zwickl , Noah Finkelstein and H. J-division undergraduate level. As part of transforming our senior-level Optics and Modern Physics Lab at the University, 01.40.Fk, 01.50.Qb INTRODUCTION At the University of Colorado Boulder (CU), we are transforming our

  5. Model Transformations Require Formal Semantics Zekai Demirezen, 2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Model Transformations Require Formal Semantics 1 Yu Sun, 1 Zekai Demirezen, 2 Tomaz Lukman, 3 limitations of model transformation, with a specific emphasis on model optimization. A primary shortcoming that can be found in many model transformation approaches and tools is the lack of formal semantics

  6. Path-transformations in probability and representation theory

    E-Print Network [OSTI]

    Jordan, Jonathan

    Path-transformations in probability and representation theory Neil O'Connell University of Warwick Biane and Philippe Bougerol Neil O'Connell Path-transforms in probability and rep. theory #12;Pitman is a three-dimensional Bessel process. Neil O'Connell Path-transforms in probability and rep. theory #12;The

  7. Model transformation testing: oracle issue Jean-Marie Mottu1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Model transformation testing: oracle issue Jean-Marie Mottu1 , Benoit Baudry1 , Yves Le Traon2 1.letraon@telecom-bretagne.eu Abstract The definition of an oracle function for model transformation is challenging because of the very complex nature of models resulting from a transformation. Validating the correctness of an output model

  8. 5 The Transformation of Policy Ideas: A Challenge for

    E-Print Network [OSTI]

    Richner, Heinz

    103 5 The Transformation of Policy Ideas: A Challenge for Development Research Laurent Goetschel1 by Legro (2000) and exploring the conditions for the transformation of these col- lective policy ideas their expectations on transformation knowledge, from which they expect the greatest added value. While

  9. Model Transformation Testing: The State of the Art

    E-Print Network [OSTI]

    Cordy, James R.

    Model Transformation Testing: The State of the Art Gehan M. K. Selim School of Computing, Queen is the notion of auto- mated model transformation, in which models are stepwise refined into more detailed models, and eventually into code. The correctness of transformations is essential to the success of MDD

  10. Pipelined Implementation of the Hough Transform in a Pyramid Multiprocessor

    E-Print Network [OSTI]

    Atiquzzaman, Mohammed

    of the transform is its requirement for a large amount of computing power. The computational requirement. 1 Introduction The Hough transform [1] is a powerful technique to detect patterns in imagesPipelined Implementation of the Hough Transform in a Pyramid Multiprocessor M. Atiquzzaman Dept

  11. Transformer Thermal Modeling: Improving Reliability Using Data Quality Control

    E-Print Network [OSTI]

    1 Transformer Thermal Modeling: Improving Reliability Using Data Quality Control Daniel J. Tylavsky--Eventually all large transformers will be dynamically loaded using models updated regularly from field measured data. Models obtained from measured data give more accurate results than models based on transformer

  12. Assessing the reliability of linear dynamic transformer thermal modelling

    E-Print Network [OSTI]

    Assessing the reliability of linear dynamic transformer thermal modelling X. Mao, D.J. Tylavsky and G.A. McCulla Abstract: Improving the utilisation of transformers requires that the hot-spot and top. An alternative method for assessing transformer model reliability is provided. 1 Introduction The maximally

  13. Transform Version 3.4 May, 1999 Edition

    E-Print Network [OSTI]

    Cohen, David

    Transform Version 3.4 May, 1999 Edition Copyright ©1990-1999 Fortner Software LLC and its Licensors. All Rights Reserved. Transform User's Guide and Reference Manual #12;Research Systems, Inc Software and its logo are trademarks of Fortner Software LLC Transform, Noesys, Plot,T3D and the HDF

  14. On the Expressive Power of the Unary Transformation Model

    E-Print Network [OSTI]

    Sandhu, Ravi

    we analyze the expressive power of a family of access control models called transformation models [10On the Expressive Power of the Unary Transformation Model Ravi S. Sandhu and Srinivas Ganta Center. The Transformation Model (TRM) was recently introduced [10] in the literature by Sandhu and Ganta. TRM is based

  15. Wavelet Transforms --A Quick Study Ivan W. Selesnick

    E-Print Network [OSTI]

    Selesnick, Ivan

    Wavelet Transforms -- A Quick Study Ivan W. Selesnick Polytechnic University Brooklyn, NY September. The wavelet transform has become a useful computational tool for a variety of signal and image processing applications. For example, the wavelet transform is useful for the compression of digital image files; smaller

  16. The Model Morphing Approach -Horizontal Transformations between Business Process

    E-Print Network [OSTI]

    The Model Morphing Approach - Horizontal Transformations between Business Process Models Marion and business to busi- ness interoperability, there is a need for model transformations in the area of business this paper concentrates on transformations of models between different business process modeling languages

  17. Correctness of Program Transformations as a Termination Problem

    E-Print Network [OSTI]

    Schmidt-Schauss, Manfred

    Correctness of Program Transformations as a Termination Problem Conrad Rau, David Sabel,sabel,schauss}@ki.informatik.uni-frankfurt.de Abstract. The diagram-based method to prove correctness of program transformations includes the computation of (critical) overlappings be- tween the analyzed program transformation and the (standard) reduction rules

  18. Rational transformations of formal power series Manfred Droste

    E-Print Network [OSTI]

    Zhang, Guo-Qiang

    Rational transformations of formal power series Manfred Droste Institut f¨ur Algebra, Technische and investigate two types of transformations for formal power series. We characterize when these transformations for algebraic optimization problems, cf. [17] and in the `max-plus-community' [5]. Regular language operations

  19. Aggressive Test Power Reduction Through Test Stimuli Transformation

    E-Print Network [OSTI]

    Orailoglu, Alex

    . Based on this analysis, we develop algorithms for transforming a set of test vectors into power- optimal that are capable of identifying the transformation that is optimal in terms of power and implementing it at minimalAggressive Test Power Reduction Through Test Stimuli Transformation ÂŁ Ozgur Sinanoglu and Alex

  20. Dataflow Transformations in High-level DSP System Design

    E-Print Network [OSTI]

    Bhattacharyya, Shuvra S.

    in the application that can be analyzed and transformed for effective optimization. Because of the high level of abstraction at which they operate, the transformations employed in this process have a large impact on keyDataflow Transformations in High-level DSP System Design (Invited Paper) Sankalita Saha, Sebastian