WorldWideScience

Sample records for faithful effective-one-body waveforms

  1. Effective-one-body waveforms for binary neutron stars using surrogate models

    CERN Document Server

    Lackey, Benjamin D; Galley, Chad R; Meidam, Jeroen; Broeck, Chris Van Den

    2016-01-01

    Gravitational-wave observations of binary neutron star systems can provide information about the masses, spins, and structure of neutron stars. However, this requires accurate and computationally efficient waveform models that take <1s to evaluate for use in Bayesian parameter estimation codes that perform 10^7 - 10^8 waveform evaluations. We present a surrogate model of a nonspinning effective-one-body waveform model with l = 2, 3, and 4 tidal multipole moments that reproduces waveforms of binary neutron star numerical simulations up to merger. The surrogate is built from compact sets of effective-one-body waveform amplitude and phase data that each form a reduced basis. We find that 12 amplitude and 7 phase basis elements are sufficient to reconstruct any binary neutron star waveform with a starting frequency of 10Hz. The surrogate has maximum errors of 3.8% in amplitude (0.04% excluding the last 100M before merger) and 0.043 radians in phase. The version implemented in the LIGO Algorithm Library takes ~...

  2. Inspiral-merger-ringdown waveforms of spinning, precessing black-hole binaries in the effective-one-body formalism

    CERN Document Server

    Pan, Yi; Taracchini, Andrea; Kidder, Lawrence E; Mroue, Abdul H; Pfeiffer, Harald P; Scheel, Mark A; Szilagyi, Bela

    2013-01-01

    We describe a general procedure to generate spinning, precessing waveforms that include inspiral, merger and ringdown stages in the effective-one-body (EOB) approach. The procedure uses a precessing frame in which precession-induced amplitude and phase modulations are minimized, and an inertial frame, aligned with the spin of the final black hole, in which we carry out the matching of the inspiral-plunge to merger-ringdown waveforms. As a first application, we build spinning, precessing EOB waveforms for the gravitational modes l=2 such that in the nonprecessing limit those waveforms agree with the EOB waveforms recently calibrated to numerical-relativity waveforms. Without recalibrating the EOB model, we then compare EOB and post-Newtonian precessing waveforms to two numerical-relativity waveforms produced by the Caltech-Cornell-CITA collaboration. The numerical waveforms are strongly precessing and have 35 and 65 gravitational-wave cycles. We find a remarkable agreement between EOB and numerical-relativity ...

  3. Toward faithful templates for non-spinning binary black holes using the effective-one-body approach

    CERN Document Server

    Buonanno, Alessandra; Baker, John G; Centrella, Joan; Kelly, Bernard J; McWilliams, Sean T; van Meter, James R

    2007-01-01

    We present an accurate approximation of the full gravitational radiation waveforms generated in the merger of non-eccentric systems of two non-spinning black holes. Utilizing information from recent numerical relativity simulations and the natural flexibility of the effective-one-body (EOB) model, we extend the latter so that it can successfully match the numerical relativity waveforms during the last stages of inspiral, merger and ringdown. By ``successfully'' here, we mean with phase differences < 8% of a gravitational-wave cycle accumulated by the end of the ringdown phase, maximizing only over time of arrival and initial phase. We obtain this result by simply adding a 4-post-Newtonian order correction in the EOB radial potential and determining the (constant) coefficient by imposing high-matching performances with numerical waveforms of mass ratios m1/m2 = 1, 3/2, 2 and 4, m1 and m2 being the individual black-hole masses. The final black-hole mass and spin predicted by the numerical simulations are use...

  4. A prototype effective-one-body model for non-precessing spinning inspiral-merger-ringdown waveforms

    CERN Document Server

    Taracchini, Andrea; Buonanno, Alessandra; Barausse, Enrico; Boyle, Michael; Chu, Tony; Lovelace, Geoffrey; Pfeiffer, Harald P; Scheel, Mark A

    2012-01-01

    We first use five non-spinning and two mildly spinning (chi_i \\simeq -0.44, +0.44) numerical-relativity waveforms of black-hole binaries and calibrate an effective-one-body (EOB) model for non-precessing spinning binaries, notably its dynamics and the dominant (2,2) gravitational-wave mode. Then, we combine the above results with recent outcomes of small-mass-ratio simulations produced by the Teukolsky equation and build a prototype EOB model for detection purposes, which is capable of generating inspiral-merger-ringdown waveforms for non-precessing spinning black-hole binaries with any mass ratio and individual black-hole spins -1 \\leq chi_i \\lesssim 0.7. We compare the prototype EOB model to two equal-mass highly spinning numerical-relativity waveforms of black holes with spins chi_i = -0.95, +0.97, which were not available at the time the EOB model was calibrated. In the case of Advanced LIGO we find that the mismatch between prototype-EOB and numerical-relativity waveforms is always smaller than 0.003 for...

  5. Binary black hole coalescence in the extreme-mass-ratio limit: testing and improving the effective-one-body multipolar waveform

    CERN Document Server

    Bernuzzi, Sebastiano; Zenginoglu, Anil

    2010-01-01

    We discuss the properties of the effective-one-body (EOB) multipolar gravitational waveform emitted by nonspinning black-hole binaries of masses $\\mu$ and $M$ in the extreme-mass-ratio limit, $\\mu/M=\

  6. Effects of neutron-star dynamic tides on gravitational waveforms within the effective-one-body approach

    CERN Document Server

    Hinderer, Tanja; Foucart, Francois; Buonanno, Alessandra; Steinhoff, Jan; Duez, Matthew; Kidder, Lawrence E; Pfeiffer, Harald P; Scheel, Mark A; Szilagyi, Bela; Hotokezaka, Kenta; Kyutoku, Koutarou; Shibata, Masaru; Carpenter, Cory W

    2016-01-01

    Extracting the unique information on ultradense nuclear matter from the gravitational waves emitted by merging, neutron-star binaries requires robust theoretical models of the signal. We develop a novel effective-one-body waveform model that includes, for the first time, dynamic (instead of only adiabatic) tides of the neutron star, as well as the merger signal for neutron-star--black-hole binaries. We demonstrate the importance of the dynamic tides by comparing our model against new numerical-relativity simulations of nonspinning neutron-star--black-hole binaries spanning more than 24 gravitational-wave cycles, and to other existing numerical simulations for double neutron-star systems. Furthermore, we derive an effective description that makes explicit the dependence of matter effects on two key parameters: tidal deformability and fundamental oscillation frequency.

  7. Frequency domain reduced order model of aligned-spin effective-one-body waveforms with generic mass ratios and spins

    Science.gov (United States)

    Pürrer, Michael

    2016-03-01

    I provide a frequency domain reduced order model (ROM) for the aligned-spin effective-one-body model "SEOBNRv2" for data analysis with second- and third-generation ground-based gravitational wave (GW) detectors. SEOBNRv2 models the dominant mode of the GWs emitted by the coalescence of black hole binaries. The large physical parameter space (dimensionless spins -1 ≤χi≤0.99 and symmetric mass ratios 0.01 ≤η ≤0.25 ) requires sophisticated reduced order modeling techniques, including patching in the parameter space and in frequency. I find that the time window over which the inspiral-plunge and the merger-ringdown waveform in SEOBNRv2 are connected has a discontinuous dependence on the parameters when the spin parameter χ =0.8 or the symmetric mass ratio η ˜0.083 . This discontinuity increases resolution requirements for the ROM. The ROM can be used for compact binary systems with total masses of 2 M⊙ or higher for the Advanced LIGO design sensitivity and a 10 Hz lower cutoff frequency. The ROM has a worst mismatch against SEOBNRv2 of ˜1 %, but in general mismatches are better than ˜0.1 %. The ROM is crucial for key data analysis applications for compact binaries, such as GW searches and parameter estimation carried out within the LIGO Scientific Collaboration.

  8. Effective-one-body waveforms calibrated to numerical relativity simulations: coalescence of non-spinning, equal-mass black holes

    CERN Document Server

    Buonanno, Alessandra; Pfeiffer, Harald P; Scheel, Mark A; Buchman, Luisa T; Kidder, Lawrence E

    2009-01-01

    We calibrate the effective-one-body (EOB) model to an accurate numerical simulation of an equal-mass, non-spinning binary black-hole coalescence produced by the Caltech-Cornell collaboration. Aligning the EOB and numerical waveforms at low frequency over a time interval of ~1000M, and taking into account the uncertainties in the numerical simulation, we investigate the significance and degeneracy of the EOB adjustable parameters during inspiral, plunge and merger, and determine the minimum number of EOB adjustable parameters that achieves phase and amplitude agreements on the order of the numerical error. We find that phase and fractional amplitude differences between the numerical and EOB values of the dominant gravitational wave mode h_{22} can be reduced to 0.02 radians and 2%, respectively, until a time 26 M before merger, and to 0.1 radians and 10%, at a time 16M after merger (during ringdown), respectively. Using LIGO, Enhanced LIGO and Advanced LIGO noise curves, we find that the overlap between the EO...

  9. Frequency domain reduced order model of aligned-spin effective-one-body waveforms with generic mass-ratios and spins

    CERN Document Server

    Pürrer, Michael

    2015-01-01

    I provide a frequency domain reduced order model (ROM) for the aligned-spin effective-one-body (EOB) model "SEOBNRv2" for data analysis with second and third generation ground based gravitational wave (GW) detectors. SEOBNRv2 models the dominant mode of the GWs emitted by the coalescence of black hole (BH) binaries. The large physical parameter space (dimensionless spins $-1 \\leq \\chi_i \\leq 0.99$ and symmetric mass-ratios $0.01 \\leq \\eta \\leq 0.25$) requires sophisticated reduced order modeling techniques, including patching in the parameter space and in frequency. I find that the time window over which the inspiral-plunge and the merger-ringdown waveform in SEOBNRv2 are connected is discontinuous when the spin of the deformed Kerr BH $\\chi=0.8$ or the symmetric mass-ratio $\\eta \\sim 0.083$. This discontinuity increases resolution requirements for the ROM. The ROM can be used for compact binary systems with total masses of $2 M_\\odot$ or higher for the advanced LIGO (aLIGO) design sensitivity and a $10$ Hz l...

  10. An improved effective-one-body model of spinning, nonprecessing binary black holes for the era of gravitational-wave astrophysics with advanced detectors

    CERN Document Server

    Bohé, Alejandro; Taracchini, Andrea; Buonanno, Alessandra; Babak, Stanislav; Harry, Ian W; Hinder, Ian; Ossokine, Serguei; Pürrer, Michael; Raymond, Vivien; Chu, Tony; Fong, Heather; Kumar, Prayush; Pfeiffer, Harald P; Boyle, Michael; Hemberger, Daniel A; Kidder, Lawrence E; Lovelace, Geoffrey; Scheel, Mark A; Szilágyi, Béla

    2016-01-01

    We improve the accuracy of the effective-one-body (EOB) waveforms that were employed during the first observing run of Advanced LIGO for binaries of spinning, nonprecessing black holes by calibrating them to a set of 141 numerical-relativity (NR) waveforms. The NR simulations expand the domain of calibration towards larger mass ratios and spins, as compared to the previous EOBNR model. Merger-ringdown waveforms computed in black-hole perturbation theory for Kerr spins close to extremal provide additional inputs to the calibration. For the inspiral-plunge phase, we use a Markov-chain Monte Carlo algorithm to efficiently explore the calibration space. For the merger-ringdown phase, we fit the NR signals with phenomenological formulae. After extrapolation of the calibrated model to arbitrary mass ratios and spins, the (dominant-mode) EOBNR waveforms have faithfulness --- at design Advanced-LIGO sensitivity --- above $99\\%$ against all the NR waveforms, including 16 additional waveforms used for validation, when ...

  11. Effective-one-body modeling of precessing black hole binaries

    Science.gov (United States)

    Taracchini, Andrea; Babak, Stanislav; Buonanno, Alessandra

    2016-03-01

    Merging black hole binaries with generic spins that undergo precessional motion emit complicated gravitational-wave signals. We discuss how such waveforms can be accurately modeled within an effective-one-body approach by (i) exploiting the simplicity of the signals in a frame that corotates with the orbital plane of the binary and (ii) relying on an accurate model of nonprecessing black hole binaries. The model is validated by extensive comparisons to 70 numerical relativity simulations of precessing black hole binaries and can generate inspiral-merger-ringdown waveforms for mass ratios up to 100 and any spin configuration. This work is an essential tool for studying and characterizing candidate gravitational-wave events in science runs of advanced LIGO.

  12. Faith

    DEFF Research Database (Denmark)

    Meier Sørensen, Bent; Spoelstra, Sverre

    2013-01-01

    In this chapter we explore the relationship between business ethics and faith. We show how business ethics is largely motivated by a now shattered faith in the capitalist entrepreneur. But this does not mean that business ethics is faithless. The shattered faith in the capitalist entrepreneur has...... made way for a number of newly created figures and concepts, including social entrepreneurship, corporate social responsibility, and responsible leadership. The belief is that these figures and concepts are capable of correcting business’ dark sides, without disrupting the faith in business itself....

  13. Validating the effective-one-body model of spinning, precessing binary black holes against numerical relativity

    Science.gov (United States)

    Babak, Stanislav; Taracchini, Andrea; Buonanno, Alessandra

    2017-01-01

    In Abbott et al. [Phys. Rev. X 6, 041014 (2016), 10.1103/PhysRevX.6.041014], the properties of the first gravitational wave detected by LIGO, GW150914, were measured by employing an effective-one-body (EOB) model of precessing binary black holes whose underlying dynamics and waveforms were calibrated to numerical-relativity (NR) simulations. Here, we perform the first extensive comparison of such an EOBNR model to 70 precessing NR waveforms that span mass ratios from 1 to 5, dimensionless spin magnitudes up to 0.5, generic spin orientations, and length of about 20 orbits. We work in the observer's inertial frame and include all ℓ=2 modes in the gravitational-wave polarizations. We introduce new prescriptions for the EOB ringdown signal concerning its spectrum and time of onset. For total masses between 10 M⊙ and 200 M⊙ , we find that precessing EOBNR waveforms have unfaithfulness within about 3% to NR waveforms when considering the Advanced-LIGO design noise curve. This result is obtained without recalibration of the inspiral-plunge signal of the underlying nonprecessing EOBNR model. The unfaithfulness is computed with maximization over time and phase of arrival, sky location, and polarization of the EOBNR waveform, and it is averaged over sky location and polarization of the NR signal. We also present comparisons between NR and EOBNR waveforms in a frame that tracks the orbital precession.

  14. Validating the effective-one-body model of spinning, precessing binary black holes against numerical relativity

    CERN Document Server

    Babak, Stanislav; Buonanno, Alessandra

    2016-01-01

    In Ref. [1], the properties of the first gravitational wave detected by LIGO, GW150914, were measured by employing an effective-one-body (EOB) model of precessing binary black holes whose underlying dynamics and waveforms were calibrated to numerical-relativity (NR) simulations. Here, we perform the first extensive comparison of such EOBNR model to 70 precessing NR waveforms that span mass ratios from 1 to 5, dimensionless spin magnitudes up to 0.5, generic spin orientations, and length of about 20 orbits. We work in the observer's inertial frame and include all $\\ell=2$ modes in the gravitational-wave polarizations. We introduce new prescriptions for the EOB ringdown signal concerning its spectrum and time of onset. For total masses between 10Msun and 200Msun, we find that precessing EOBNR waveforms have unfaithfulness within about 3% to NR waveforms when considering the Advanced-LIGO design noise curve. This result is obtained without recalibration of the inspiral-plunge of the underlying nonprecessing EOBN...

  15. 4th post-Newtonian effective one-body dynamics

    CERN Document Server

    Damour, Thibault; Schäfer, Gerhard

    2015-01-01

    The conservative dynamics of gravitationally interacting two-point-mass systems has been recently determined at the 4th post-Newtonian (4PN) approximation [T. Damour, P. Jaranowski, and G. Sch\\"afer, Phys. Rev. D 89, 064058 (2014)], and found to be nonlocal-in-time. We show how to transcribe this dynamics within the effective one-body (EOB) formalism. To achieve this EOB transcription, we develop a new strategy involving the (infinite-)order-reduction of a nonlocal dynamics to an ordinary action-angle Hamiltonian. Our final, equivalent EOB dynamics comprises two (local) radial potentials, $A(r)$ and $\\bar{D}(r)$, and a non-geodesic mass-shell contribution $Q(r,p_r)$ given by an infinite series of even powers of the radial momentum $p_r$. Using an effective action technique, we complete our 4PN-level results by deriving two different, higher-order conservative contributions linked to tail-transported hereditary effects: the 5PN-level EOB logarithmic terms, as well as the 5.5PN-level, half-integral terms. We co...

  16. Periastron Advance in Spinning Black Hole Binaries: Comparing Effective-One-Body and Numerical Relativity

    CERN Document Server

    Hinderer, Tanja; Mroué, Abdul H; Hemberger, Daniel A; Lovelace, Geoffrey; Pfeiffer, Harald P

    2013-01-01

    We compute the periastron advance using the effective-one-body formalism for binary black holes moving on quasi-circular orbits and having spins collinear with the orbital angular momentum. We compare the predictions with the periastron advance recently computed in accurate numerical-relativity simulations and find remarkable agreement for a wide range of spins and mass ratios. These results do not use any numerical-relativity calibration of the effective-one-body model, and stem from two key ingredients in the effective-one-body Hamiltonian: (i) the mapping of the two-body dynamics of spinning particles onto the dynamics of an effective spinning particle in a (deformed) Kerr spacetime, fully symmetrized with respect to the two-body masses and spins, and (ii) the resummation, in the test-particle limit, of all post-Newtonian (PN) corrections linear in the spin of the particle. In fact, even when only the leading spin PN corrections are included in the effective-one-body spinning Hamiltonian but all the test-p...

  17. Improved effective-one-body model of spinning, nonprecessing binary black holes for the era of gravitational-wave astrophysics with advanced detectors

    Science.gov (United States)

    Bohé, Alejandro; Shao, Lijing; Taracchini, Andrea; Buonanno, Alessandra; Babak, Stanislav; Harry, Ian W.; Hinder, Ian; Ossokine, Serguei; Pürrer, Michael; Raymond, Vivien; Chu, Tony; Fong, Heather; Kumar, Prayush; Pfeiffer, Harald P.; Boyle, Michael; Hemberger, Daniel A.; Kidder, Lawrence E.; Lovelace, Geoffrey; Scheel, Mark A.; Szilágyi, Béla

    2017-02-01

    We improve the accuracy of the effective-one-body (EOB) waveforms that were employed during the first observing run of Advanced LIGO for binaries of spinning, nonprecessing black holes by calibrating them to a set of 141 numerical-relativity (NR) waveforms. The NR simulations expand the domain of calibration toward larger mass ratios and spins, as compared to the previous EOBNR model. Merger-ringdown waveforms computed in black-hole perturbation theory for Kerr spins close to extremal provide additional inputs to the calibration. For the inspiral-plunge phase, we use a Markov-chain Monte Carlo algorithm to efficiently explore the calibration space. For the merger-ringdown phase, we fit the NR signals with phenomenological formulae. After extrapolation of the calibrated model to arbitrary mass ratios and spins, the (dominant-mode) EOBNR waveforms have faithfulness—at design Advanced-LIGO sensitivity—above 99% against all the NR waveforms, including 16 additional waveforms used for validation, when maximizing only on initial phase and time. This implies a negligible loss in event rate due to modeling for these binary configurations. We find that future NR simulations at mass ratios ≳4 and double spin ≳0.8 will be crucial to resolving discrepancies between different ways of extrapolating waveform models. We also find that some of the NR simulations that already exist in such region of parameter space are too short to constrain the low-frequency portion of the models. Finally, we build a reduced-order version of the EOBNR model to speed up waveform generation by orders of magnitude, thus enabling intensive data-analysis applications during the upcoming observation runs of Advanced LIGO.

  18. Gravitational scattering, post-Minkowskian approximation and Effective One-Body theory

    CERN Document Server

    Damour, Thibault

    2016-01-01

    A novel approach to the Effective One-Body description of gravitationally interacting two-body systems is introduced. This approach is based on the post-Minkowskian approximation scheme (perturbation theory in G, without assuming small velocities), and employs a new dictionary focussing on the functional dependence of the scattering angle on the total energy and the total angular momentum of the system. Using this approach, we prove to all orders in v/c two results that were previously known to hold only to a limited post-Newtonian accuracy: (i) the relativistic gravitational dynamics of a two-body system is equivalent, at first post-Minkowskian order, to the relativistic dynamics of an effective test particle moving in a Schwarzschild metric; and (ii) this equivalence requires the existence of an exactly quadratic map between the real (relativistic) two-body energy and the (relativistic) energy of the effective particle. The same energy map is also shown to apply to the effective one-body description of two ...

  19. Dynamical Tides in General Relativity: Effective Action and Effective-One-Body Hamiltonian

    CERN Document Server

    Steinhoff, Jan; Buonanno, Alessandra; Taracchini, Andrea

    2016-01-01

    Tidal effects have an important impact on the late inspiral of compact binary systems containing neutron stars. Most current models of tidal deformations of neutron stars assume that the tidal bulge is directly related to the tidal field generated by the companion, with a constant response coefficient. However, if the orbital motion approaches a resonance with one of the internal modes of the neutron star, this adiabatic description of tidal effects starts to break down, and the tides become dynamical. In this paper, we consider dynamical tides in general relativity due to the quadrupolar fundamental oscillation mode of a neutron star. We devise a description of the effects of the neutron star's finite size on the orbital dynamics based on an effective point-particle action augmented by dynamical quadrupolar degrees of freedom. We analyze the post-Newtonian and test-particle approximations of this model and incorporate the results into an effective-one-body Hamiltonian. This enables us to extend the descripti...

  20. Dynamical tides in general relativity: Effective action and effective-one-body Hamiltonian

    Science.gov (United States)

    Steinhoff, Jan; Hinderer, Tanja; Buonanno, Alessandra; Taracchini, Andrea

    2016-11-01

    Tidal effects have an important impact on the late inspiral of compact binary systems containing neutron stars. Most current models of tidal deformations of neutron stars assume that the tidal bulge is directly related to the tidal field generated by the companion, with a constant response coefficient. However, if the orbital motion approaches a resonance with one of the internal modes of the neutron star, this adiabatic description of tidal effects starts to break down, and the tides become dynamical. In this paper, we consider dynamical tides in general relativity due to the quadrupolar fundamental oscillation mode of a neutron star. We devise a description of the effects of the neutron star's finite size on the orbital dynamics based on an effective point-particle action augmented by dynamical quadrupolar degrees of freedom. We analyze the post-Newtonian and test-particle approximations of this model and incorporate the results into an effective-one-body Hamiltonian. This enables us to extend the description of dynamical tides over the entire inspiral. We demonstrate that dynamical tides give a significant enhancement of matter effects compared to adiabatic tides, at least for neutron stars with large radii and for low mass-ratio systems, and should therefore be included in accurate models for gravitational-wave data analysis.

  1. Assessing Accuracy of Waveform Models against Numerical Relativity Waveforms

    Science.gov (United States)

    Pürrer, Michael; LVC Collaboration

    2016-03-01

    We compare currently available phenomenological and effective-one-body inspiral-merger-ringdown models for gravitational waves (GW) emitted from coalescing black hole binaries against a set of numerical relativity waveforms from the SXS collaboration. Simplifications are used in the construction of some waveform models, such as restriction to spins aligned with the orbital angular momentum, no inclusion of higher harmonics in the GW radiation, no modeling of eccentricity and the use of effective parameters to describe spin precession. In contrast, NR waveforms provide us with a high fidelity representation of the ``true'' waveform modulo small numerical errors. To focus on systematics we inject NR waveforms into zero noise for early advanced LIGO detector sensitivity at a moderately optimistic signal-to-noise ratio. We discuss where in the parameter space the above modeling assumptions lead to noticeable biases in recovered parameters.

  2. Conservative second-order gravitational self-force on circular orbits and the effective one-body formalism

    CERN Document Server

    Bini, Donato

    2016-01-01

    We consider Detweiler's redshift variable $z$ for a nonspinning mass $m_1$ in circular motion (with orbital frequency $\\Omega$) around a nonspinning mass $m_2$. We show how the combination of effective-one-body (EOB) theory with the first law of binary dynamics allows one to derive a simple, exact expression for the functional dependence of $z$ on the (gauge-invariant) EOB gravitational potential $u=(m_1+m_2)/R$. We then use the recently obtained high-post-Newtonian(PN)-order knowledge of the main EOB radial potential $A(u ; \

  3. Parametrized-4.5PN TaylorF2 approximants and tail effects to quartic nonlinear order from the effective one body formalism

    Science.gov (United States)

    Messina, Francesco; Nagar, Alessandro

    2017-06-01

    By post-Newtonian (PN) expanding the well-known, factorized and resummed, effective-one-body energy flux for circularized binaries, we show that (i) because of the presence of the resummed tail factor, the 4.5PN-accurate tails-of-tails-of-tails contribution to the energy flux recently computed by Marchand et al. [Classical Quantum Gravity 33, 244003 (2016), 10.1088/0264-9381/33/24/244003] is actually contained in the resummed expression; this is also the case of the next-to-leading-order tail-induced spin-orbit term of Marsat et al. [Classical Quantum Gravity 31, 025023 (2014), 10.1088/0264-9381/31/2/025023]; (ii) in performing this expansion, we also obtain, for the first time, the explicit 3.5PN leading-order tail-induced spin-spin flux term; and (iii) pushing the PN expansion of the (nonspinning) EOB flux up to 5.5PN order, we compute 4PN, 5PN, and 5.5PN contributions to the energy flux, though in a form that explicitly depends on, currently unknown, 4PN and 5PN non-test-mass corrections to the factorized waveform amplitudes. Within this (parametrized) 4.5PN accuracy, we calculate the Taylor F2 approximant. Focusing for simplicity on the nonspinning case and using the numerical-relativity calibrated IMRPhenomD waveform model as a benchmark, we demonstrate that it is possible to reproduce the derivative of the IMRPhenomD phase (say up to the frequency of the Schwarzschild last-stable-orbit) by flexing only a 4PN "effective" waveform amplitude parameter. A preliminary analysis also illustrates that similar results can be obtained for the spin-aligned case provided only the leading-order spin-orbit and spin-spin terms are kept. Our findings suggest that these types of EOB-derived, parametrized, higher-order, PN approximants may serve as promising tools to construct inspiral-merger-ringdown phenomenological models or even to replace the standardly used 3.5PN-accurate TaylorF2 approximant in searches of small-mass binaries.

  4. Improved effective-one-body description of coalescing nonspinning black-hole binaries and its numerical-relativity completion

    CERN Document Server

    Damour, Thibault; Bernuzzi, Sebastiano

    2012-01-01

    We improve the effective-one-body (EOB) description of nonspinning coalescing black hole binaries by incorporating several recent analytical advances, notably: (i) logarithmic contributions to the conservative dynamics; (ii) resummed horizon-absorption contribution to the orbital angular momentum loss; and (iii) a specific radial component of the radiation reaction force implied by consistency with the azimuthal one. We then complete this analytically improved EOB model by comparing it to accurate numerical relativity (NR) simulations performed by the Caltech-Cornell-CITA group for mass ratios $q=(1,2,3,4,6)$. In particular, the comparison to NR data allows us to determine with high-accuracy ($\\sim 10^{-4}$) the value of the main EOB radial potential: $A(u;\\,\

  5. Precession effect of the gravitational self-force in a Schwarzschild spacetime and the effective one-body formalism

    CERN Document Server

    Barack, Leor; Sago, Norichika

    2010-01-01

    Using a recently presented numerical code for calculating the Lorenz-gauge gravitational self-force (GSF), we compute the $O(m)$ conservative correction to the precession rate of the small-eccentricity orbits of a particle of mass $m$ moving around a Schwarzschild black hole of mass ${\\mathsf M}\\gg m$. Specifically, we study the gauge-invariant function $\\rho(x)$, where $\\rho$ is defined as the $O(m)$ part of the dimensionless ratio $(\\hat\\Omega_r/\\hat\\Omega_{\\varphi})^2$ between the squares of the radial and azimuthal frequencies of the orbit, and where $x=[Gc^{-3}({\\mathsf M}+m)\\hat\\Omega_{\\varphi}]^{2/3}$ is a gauge-invariant measure of the dimensionless gravitational potential (mass over radius) associated with the mean circular orbit. Our GSF computation of the function $\\rho(x)$ in the interval $0Effective One Body (EOB) description of the conservative dynamics of bi...

  6. A new effective-one-body Hamiltonian with next-to-leading order spin-spin coupling

    CERN Document Server

    Balmelli, Simone

    2015-01-01

    We present a new effective-one-body (EOB) Hamiltonian with next-to-leading order (NLO) spin-spin coupling for black hole binaries endowed with arbitrarily oriented spins. The Hamiltonian is based on the model for parallel spins and equatorial orbits developed in [Physical Review D 90, 044018 (2014)], but differs from it in several ways. In particular, the NLO spin-spin coupling is not incorporated by a redefinition of the centrifugal radius $r_c$, but by separately modifying certain sectors of the Hamiltonian, which are identified according to their dependence on the momentum vector. The gauge-fixing procedure we follow allows us to reduce the 25 different terms of the NLO spin-spin Hamiltonian in Arnowitt-Deser-Misner coordinates to only 9 EOB terms. This is an improvement with respect to the EOB model recently proposed in [Physical Review D 91, 064011 (2015)], where 12 EOB terms were involved. Another important advantage is the remarkably simple momentum structure of the spin-spin terms in the effective Ham...

  7. Horizon-absorption effects in coalescing black-hole binaries: An effective-one-body study of the non-spinning case

    CERN Document Server

    Bernuzzi, Sebastiano; Zenginoglu, Anil

    2012-01-01

    We study the horizon absorption of gravitational waves in coalescing, circularized, nonspinning black hole binaries. The horizon absorbed fluxes of a binary with a large mass ratio (q=1000) obtained by numerical perturbative simulations are compared with an analytical, effective-one-body (EOB) resummed expression recently proposed. The perturbative method employs an analytical, linear in the mass ratio, effective-one-body (EOB) resummed radiation reaction, and the Regge-Wheeler-Zerilli (RWZ) formalism for wave extraction. Hyperboloidal (transmitting) layers are employed for the numerical solution of the RWZ equations to accurately compute horizon fluxes up to the late plunge phase. The horizon fluxes from perturbative simulations and the EOB-resummed expression agree at the level of a few percent down to the late plunge. An upgrade of the EOB model for nonspinning binaries that includes horizon absorption of angular momentum as an additional term in the resummed radiation reaction is then discussed. The effec...

  8. Interpolation in waveform space: enhancing the accuracy of gravitational waveform families using numerical relativity

    CERN Document Server

    Cannon, Kipp; Hanna, Chad; Keppel, Drew; Pfeiffer, Harald

    2012-01-01

    Matched-filtering for the identification of compact object mergers in gravitational-wave antenna data involves the comparison of the data stream to a bank of template gravitational waveforms. Typically the template bank is constructed from phenomenological waveform models since these can be evaluated for an arbitrary choice of physical parameters. Recently it has been proposed that singular value decomposition (SVD) can be used to reduce the number of templates required for detection. As we show here, another benefit of SVD is its removal of biases from the phenomenological templates along with a corresponding improvement in their ability to represent waveform signals obtained from numerical relativity (NR) simulations. Using these ideas, we present a method that calibrates a reduced SVD basis of phenomenological waveforms against NR waveforms in order to construct a new waveform approximant with improved accuracy and faithfulness compared to the original phenomenological model. The new waveform family is giv...

  9. Effective one body approach to the dynamics of two spinning black holes with next-to-leading order spin-orbit coupling

    CERN Document Server

    Damour, Thibault; Schäfer, Gerhard

    2008-01-01

    Using a recent, novel Hamiltonian formulation of the gravitational interaction of spinning binaries, we extend the Effective One Body (EOB) description of the dynamics of two spinning black holes to next-to-leading order (NLO) in the spin-orbit interaction. The spin-dependent EOB Hamiltonian is constructed from four main ingredients: (i) a transformation between the ``effective'' Hamiltonian and the ``real'' one, (ii) a generalized effective Hamilton-Jacobi equation involving higher powers of the momenta, (iii) a Kerr-type effective metric (with Pad\\'e-resummed coefficients) which depends on the choice of some basic ``effective spin vector'' $\\bf{S}_{\\rm eff}$, and which is deformed by comparable-mass effects, and (iv) an additional effective spin-orbit interaction term involving another spin vector $\\bsigma$. As a first application of the new, NLO spin-dependent EOB Hamiltonian, we compute the binding energy of circular orbits (for parallel spins) as a function of the orbital frequency, and of the spin param...

  10. Fast Prediction and Evaluation of Gravitational Waveforms Using Surrogate Models

    Directory of Open Access Journals (Sweden)

    Scott E. Field

    2014-07-01

    Full Text Available We propose a solution to the problem of quickly and accurately predicting gravitational waveforms within any given physical model. The method is relevant for both real-time applications and more traditional scenarios where the generation of waveforms using standard methods can be prohibitively expensive. Our approach is based on three offline steps resulting in an accurate reduced order model in both parameter and physical dimensions that can be used as a surrogate for the true or fiducial waveform family. First, a set of m parameter values is determined using a greedy algorithm from which a reduced basis representation is constructed. Second, these m parameters induce the selection of m time values for interpolating a waveform time series using an empirical interpolant that is built for the fiducial waveform family. Third, a fit in the parameter dimension is performed for the waveform’s value at each of these m times. The cost of predicting L waveform time samples for a generic parameter choice is of order O(mL+mc_{fit} online operations, where c_{fit} denotes the fitting function operation count and, typically, m≪L. The result is a compact, computationally efficient, and accurate surrogate model that retains the original physics of the fiducial waveform family while also being fast to evaluate. We generate accurate surrogate models for effective-one-body waveforms of nonspinning binary black hole coalescences with durations as long as 10^{5}M, mass ratios from 1 to 10, and for multiple spherical harmonic modes. We find that these surrogates are more than 3 orders of magnitude faster to evaluate as compared to the cost of generating effective-one-body waveforms in standard ways. Surrogate model building for other waveform families and models follows the same steps and has the same low computational online scaling cost. For expensive numerical simulations of binary black hole coalescences, we thus anticipate extremely large speedups in

  11. The Location of Faith

    DEFF Research Database (Denmark)

    McLisky, Claire Louise

    2010-01-01

    The description and analysis of religious faith, whether as embodied experience or as the subject of academic inquiry, is a troubled undertaking at the best of times. It is particularly fraught in the context of settler-colonial Christian missions to Indigenous peoples, where historical distance...... missions in the history of Aboriginal peoples and the continuing resonance of Christianity in many Aboriginal communities, the importance of undrstanding how and why faith worked on Aboriginal missions cannot be overestimated. This paper takes a fresh look at questions of belief through a consideration...

  12. Faith, Fact, and Behaviorism.

    Science.gov (United States)

    Staddon, J E R

    2013-01-01

    David Hume argued that ought cannot be derived from is. That is, no set of facts, no amount of scientific knowledge, is by itself sufficient to urge us to action. Yet generations of well-meaning scientists (more and more as secular influences grow in the West) seem to have forgotten Hume's words of wisdom. All motivated action depends ultimately on beliefs that cannot be proved by the methods of science, that is, on faith.

  13. Faith, Fact, and Behaviorism

    OpenAIRE

    Staddon, J. E. R.

    2013-01-01

    David Hume argued that ought cannot be derived from is. That is, no set of facts, no amount of scientific knowledge, is by itself sufficient to urge us to action. Yet generations of well-meaning scientists (more and more as secular influences grow in the West) seem to have forgotten Hume's words of wisdom. All motivated action depends ultimately on beliefs that cannot be proved by the methods of science, that is, on faith.

  14. Simple Waveforms, Simply Described

    Science.gov (United States)

    Baker, John G.

    2008-01-01

    Since the first Lazarus Project calculations, it has been frequently noted that binary black hole merger waveforms are 'simple.' In this talk we examine some of the simple features of coalescence and merger waveforms from a variety of binary configurations. We suggest an interpretation of the waveforms in terms of an implicit rotating source. This allows a coherent description, of both the inspiral waveforms, derivable from post-Newtonian(PN) calculations, and the numerically determined merger-ringdown. We focus particularly on similarities in the features of various Multipolar waveform components Generated by various systems. The late-time phase evolution of most L these waveform components are accurately described with a sinple analytic fit. We also discuss apparent relationships among phase and amplitude evolution. Taken together with PN information, the features we describe can provide an approximate analytic description full coalescence wavefoRms. complementary to other analytic waveforns approaches.

  15. Kludge modified gravity inspiral-merger-ringdown waveforms: Testing gravitational-wave tests of general relativity

    Science.gov (United States)

    Johnson-McDaniel, Nathan; Ghosh, Abhirup; Ghosh, Archisman; Samajdar, Anuradha; Ajith, Parameswaran; Del Pozzo, Walter

    2016-03-01

    We describe a variety of self-consistent modifications of the effective-one-body framework that yield kludge modified gravity inspiral-merger-ringdown (IMR) waveforms. These waveforms do not correspond to any particular modified theory of gravity, but offer parametrized deviations from general relativity in various regimes. They can thus be used to test the performance of various gravitational wave tests of general relativity (GR). As an example, we introduce the IMR consistency test, which tests for consistency between the estimations of the final mass and spin from the inspiral and merger-ringdown portions of a binary black hole waveform. We show that for reasonable source parameters and SNRs in Advanced LIGO, this test is able to detect a deviation from GR with high confidence for certain modifications of the GR energy flux that are not constrained by observations of the double pulsar. We also consider the performance of a parameterized test of GR on these kludge modified gravity waveforms.

  16. Reduced order model for binary neutron star waveforms with tidal interactions

    Science.gov (United States)

    Lackey, Benjamin; Bernuzzi, Sebastiano; Galley, Chad

    2016-03-01

    Observations of inspiralling binary neutron star (BNS) systems with Advanced LIGO can be used to determine the unknown neutron-star equation of state by measuring the phase shift in the gravitational waveform due to tidal interactions. Unfortunately, this requires computationally efficient waveform models for use in parameter estimation codes that typically require 106-107 sequential waveform evaluations, as well as accurate waveform models with phase errors less than 1 radian over the entire inspiral to avoid systematic errors in the measured tidal deformability. The effective one body waveform model with l = 2 , 3, and 4 tidal multipole moments is currently the most accurate model for BNS systems, but takes several minutes to evaluate. We develop a reduced order model of this waveform by constructing separate orthonormal bases for the amplitude and phase evolution. We find that only 10-20 bases are needed to reconstruct any BNS waveform with a starting frequency of 10 Hz. The coefficients of these bases are found with Chebyshev interpolation over the waveform parameter space. This reduced order model has maximum errors of 0.2 radians, and results in a speedup factor of more than 103, allowing parameter estimation codes to run in days to weeks rather than decades.

  17. Good Faith and Game Theory

    DEFF Research Database (Denmark)

    Rose, Caspar

    2016-01-01

    This article shows how game theory can be applied to model good faith mathematically using an example of a classic legal dispute related to rei vindicato. The issue is whether an owner has a legal right to his good if a person has bought it in good faith by using updated probabilities. The article...

  18. Attachment and Women's Faith Development

    Science.gov (United States)

    Joung, Eun Sim

    2006-01-01

    This article explores the relationship between human attachment and God attachment, particularly in Christian women's experiences of faith. It is based on the attachment perspective as a conceptual framework. The main aim was to evolve an attachment-theoretical approach to women's faith development and to offer a complementary path to interpret…

  19. Faithful Squashed Entanglement

    CERN Document Server

    Brandao, Fernando G S L; Yard, Jon

    2010-01-01

    Squashed entanglement is a measure for the entanglement of bipartite quantum states. In this paper we present a lower bound for squashed entanglement in terms of the LOCC distance to the set of separable states. This implies that squashed entanglement is faithful, that is, it is strictly positive if and only if the state is entangled. We derive the lower bound on squashed entanglement from a lower bound on the quantum conditional mutual information which is used to define squashed entanglement. The quantum conditional mutual information corresponds to the amount by which strong subadditivity of von Neumann entropy fails to be saturated. Our result therefore sheds light on the structure of states that almost satisfy strong subadditivity with equality. The proof is based on two recent results from quantum information theory: the operational interpretation of the quantum mutual information as the optimal rate for state redistribution and the interpretation of the regularised relative entropy of entanglement as a...

  20. Evolution and Christian Faith

    Science.gov (United States)

    Roughgarden, J. E.

    2006-12-01

    My recent book, Evolution and Christian Faith explores how evolutionary biology can be portrayed from the religious perspective of Christianity. The principal metaphors for evolutionary biology---differential success at breeding and random mutation, probably originate with the dawn of agriculture and clearly occur in the Bible. The central narrative of evolutionary biology can be presented using Biblical passages, providing an account of evolution that is inherently friendly to a Christian perspective. Still, evolutionary biology is far from complete, and problematic areas pertain to species in which the concept of an individual is poorly defined, and to species in which the expression of gender and sexuality depart from Darwin's sexual-selection templates. The present- day controversy in the US about teaching evolution in the schools provides an opportunity to engage the public about science education.

  1. An MSK Radar Waveform

    Science.gov (United States)

    Quirk, Kevin J.; Srinivasan, Meera

    2012-01-01

    The minimum-shift-keying (MSK) radar waveform is formed by periodically extending a waveform that separately modulates the in-phase and quadrature- phase components of the carrier with offset pulse-shaped pseudo noise (PN) sequences. To generate this waveform, a pair of periodic PN sequences is each passed through a pulse-shaping filter with a half sinusoid impulse response. These shaped PN waveforms are then offset by half a chip time and are separately modulated on the in-phase and quadrature phase components of an RF carrier. This new radar waveform allows an increase in radar resolution without the need for additional spectrum. In addition, it provides self-interference suppression and configurable peak sidelobes. Compared strictly on the basis of the expressions for delay resolution, main-lobe bandwidth, effective Doppler bandwidth, and peak ambiguity sidelobe, it appears that bi-phase coded (BPC) outperforms the new MSK waveform. However, a radar waveform must meet certain constraints imposed by the transmission and reception of the modulation, as well as criteria dictated by the observation. In particular, the phase discontinuity of the BPC waveform presents a significant impediment to the achievement of finer resolutions in radar measurements a limitation that is overcome by using the continuous phase MSK waveform. The phase continuity, and the lower fractional out-of-band power of MSK, increases the allowable bandwidth compared with BPC, resulting in a factor of two increase in the range resolution of the radar. The MSK waveform also has been demonstrated to have an ambiguity sidelobe structure very similar to BPC, where the sidelobe levels can be decreased by increasing the length of the m-sequence used in its generation. This ability to set the peak sidelobe level is advantageous as it allows the system to be configured to a variety of targets, including those with a larger dynamic range. Other conventionally used waveforms that possess an even greater

  2. Adaptive multi-step Full Waveform Inversion based on Waveform Mode Decomposition

    Science.gov (United States)

    Hu, Yong; Han, Liguo; Xu, Zhuo; Zhang, Fengjiao; Zeng, Jingwen

    2017-04-01

    Full Waveform Inversion (FWI) can be used to build high resolution velocity models, but there are still many challenges in seismic field data processing. The most difficult problem is about how to recover long-wavelength components of subsurface velocity models when seismic data is lacking of low frequency information and without long-offsets. To solve this problem, we propose to use Waveform Mode Decomposition (WMD) method to reconstruct low frequency information for FWI to obtain a smooth model, so that the initial model dependence of FWI can be reduced. In this paper, we use adjoint-state method to calculate the gradient for Waveform Mode Decomposition Full Waveform Inversion (WMDFWI). Through the illustrative numerical examples, we proved that the low frequency which is reconstructed by WMD method is very reliable. WMDFWI in combination with the adaptive multi-step inversion strategy can obtain more faithful and accurate final inversion results. Numerical examples show that even if the initial velocity model is far from the true model and lacking of low frequency information, we still can obtain good inversion results with WMD method. From numerical examples of anti-noise test, we see that the adaptive multi-step inversion strategy for WMDFWI has strong ability to resist Gaussian noise. WMD method is promising to be able to implement for the land seismic FWI, because it can reconstruct the low frequency information, lower the dominant frequency in the adjoint source, and has a strong ability to resist noise.

  3. High-frequency chest compression: effect of the third generation compression waveform.

    Science.gov (United States)

    Milla, Carlos E; Hansen, Leland G; Weber, Adam; Warwick, Warren J

    2004-01-01

    High-frequency chest compression (HFCC) therapy has become the prevailing form of airway clearance for patients with cystic fibrosis (CF) in the United States. The original square waveform was replaced in 1995 with a sine waveform without published evidence of an equality of effectiveness. The recent development of a triangle waveform for HFCC provided the opportunity to compare the functional and therapeutic effects of different waveforms. Clinical testing was done in patients at home with therapy times recorded with all sputum collected in preweighed sealable vials. The eight study patients with CF were regular users of a sine waveform device. They produced sputum consistently and were clinically stable. They used their optimum frequencies for therapy for each waveform and, for one week for each waveform, collected all sputum during their twice-daily timed HFCC therapies. After collection, these vials were reweighed, desiccated, and reweighed to calculate wet and dry weights of sputum per minute of therapy time. Frequency associated vest pressures transmitted to the mouth, and induced airflows at the mouth were measured in healthy volunteers. The pressure waveforms produced in the vest were, in shape, faithfully demonstrable at the mouth. In the healthy subject the transmission occurred in 2 ms and was attenuated to about 75% of the vest pressure for the triangle waveform and 60% for the sine waveform. All patients produced more sputum with the triangle waveform than with the sine waveform. The mean increase was 20%+ range of 4% to 41%. P value was HFCC should investigate the other effects of the sine and triangle waveforms, as well as the neglected square waveform, on mucus clearance and determine the best frequencies for each waveform, disease, and patient.

  4. DSP Based Waveform Generator

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The DSP Based Waveform Generator is used for CSR Control system to control special controlled objects, such as the pulsed power supply for magnets, RF system, injection and extraction synchronization, global CSR synchronization etc. This intelligent controller based on 4800 MIPS DSP and 256M SDRAM technology will supply highly stable and highly accurate reference waveform used by the power supply of magnets. The specifications are as follows:

  5. Arbitrary waveform generator

    Science.gov (United States)

    Griffin, Maurice; Sugawara, Glen

    1995-02-01

    A system for storing an arbitrary waveform on nonvolatile random access memory (NVRAM) device and generating an analog signal using the NVRAM device is described. A central processing unit is used to synthesize an arbitrary waveform and create a digital representation of the waveform and transfer the digital representation to a microprocessor which, in turn, writes the digital data into an NVRAM device which has been mapped into a portion of the microprocessor address space. The NVRAM device is removed from address space and placed into an independent waveform generation unit. In the waveform generation unit, an address clock provides an address timing signal and a cycle clock provides a transmit signal. Both signals are applied to an address generator. When both signals are present, the address generator generates and transmits to the NVRAM device a new address for each cycle of the address timing signal. In response to each new address generated, the NVRAM devices provides a digital output which is applied to a digital to analog converter. The converter produces a continuous analog output which is smoothed by a filter to produce the arbitrary waveform.

  6. Arterial waveform analysis.

    Science.gov (United States)

    Esper, Stephen A; Pinsky, Michael R

    2014-12-01

    The bedside measurement of continuous arterial pressure values from waveform analysis has been routinely available via indwelling arterial catheterization for >50 years. Invasive blood pressure monitoring has been utilized in critically ill patients, in both the operating room and critical care units, to facilitate rapid diagnoses of cardiovascular insufficiency and monitor response to treatments aimed at correcting abnormalities before the consequences of either hypo- or hypertension are seen. Minimally invasive techniques to estimate cardiac output (CO) have gained increased appeal. This has led to the increased interest in arterial waveform analysis to provide this important information, as it is measured continuously in many operating rooms and intensive care units. Arterial waveform analysis also allows for the calculation of many so-called derived parameters intrinsically created by this pulse pressure profile. These include estimates of left ventricular stroke volume (SV), CO, vascular resistance, and during positive-pressure breathing, SV variation, and pulse pressure variation. This article focuses on the principles of arterial waveform analysis and their determinants, components of the arterial system, and arterial pulse contour. It will also address the advantage of measuring real-time CO by the arterial waveform and the benefits to measuring SV variation. Arterial waveform analysis has gained a large interest in the overall assessment and management of the critically ill and those at a risk of hemodynamic deterioration.

  7. Full Waveform Inversion Using Waveform Sensitivity Kernels

    Science.gov (United States)

    Schumacher, Florian; Friederich, Wolfgang

    2013-04-01

    We present a full waveform inversion concept for applications ranging from seismological to enineering contexts, in which the steps of forward simulation, computation of sensitivity kernels, and the actual inversion are kept separate of each other. We derive waveform sensitivity kernels from Born scattering theory, which for unit material perturbations are identical to the Born integrand for the considered path between source and receiver. The evaluation of such a kernel requires the calculation of Green functions and their strains for single forces at the receiver position, as well as displacement fields and strains originating at the seismic source. We compute these quantities in the frequency domain using the 3D spectral element code SPECFEM3D (Tromp, Komatitsch and Liu, 2008) and the 1D semi-analytical code GEMINI (Friederich and Dalkolmo, 1995) in both, Cartesian and spherical framework. We developed and implemented the modularized software package ASKI (Analysis of Sensitivity and Kernel Inversion) to compute waveform sensitivity kernels from wavefields generated by any of the above methods (support for more methods is planned), where some examples will be shown. As the kernels can be computed independently from any data values, this approach allows to do a sensitivity and resolution analysis first without inverting any data. In the context of active seismic experiments, this property may be used to investigate optimal acquisition geometry and expectable resolution before actually collecting any data, assuming the background model is known sufficiently well. The actual inversion step then, can be repeated at relatively low costs with different (sub)sets of data, adding different smoothing conditions. Using the sensitivity kernels, we expect the waveform inversion to have better convergence properties compared with strategies that use gradients of a misfit function. Also the propagation of the forward wavefield and the backward propagation from the receiver

  8. Compressive full waveform lidar

    Science.gov (United States)

    Yang, Weiyi; Ke, Jun

    2017-05-01

    To avoid high bandwidth detector, fast speed A/D converter, and large size memory disk, a compressive full waveform LIDAR system, which uses a temporally modulated laser instead of a pulsed laser, is studied in this paper. Full waveform data from NEON (National Ecological Observatory Network) are used. Random binary patterns are used to modulate the source. To achieve 0.15 m ranging resolution, a 100 MSPS A/D converter is assumed to make measurements. SPIRAL algorithm with canonical basis is employed when Poisson noise is considered in the low illuminated condition.

  9. The DNA of Religious Faith

    Science.gov (United States)

    Barash, David P.

    2007-01-01

    In this article, the author discusses the tensions between science and religion. According to recent books--many of them by prominent biologists--the era of deference to religious belief--belief without evidence--is ending as faith is subjected to gimlet-eyed scrutiny. Like Mark Twain's celebrated comment about stopping smoking, scholars have…

  10. A Faithful Defender of Patriarchy

    Institute of Scientific and Technical Information of China (English)

    杨双菊

    2010-01-01

    The hero in the masterpiece of Charlotte Bronte Jane Eyre--Edward Rochester acts as a faithful defender on the matter of his marriage with Bertha Mason.His compliance with the patriarchal rules mostly displays in three aspects,that is,male dominant household,men's superiority to women in law,and man's supremacy in marriage.

  11. Faith Ringgold and Her Escapes.

    Science.gov (United States)

    Snead, Susan

    1988-01-01

    Faith Ringgold is a Black feminist artist who, like her mother before her, is a strong woman determined to leave a legacy in Black culture. Her works show much emotion and personal commitment as she portrays the joys and struggles of Black people in crafts and fine arts. (VM)

  12. Quantum optical waveform conversion

    CERN Document Server

    Kielpinski, D; Wiseman, HM

    2010-01-01

    Currently proposed architectures for long-distance quantum communication rely on networks of quantum processors connected by optical communications channels [1,2]. The key resource for such networks is the entanglement of matter-based quantum systems with quantum optical fields for information transmission. The optical interaction bandwidth of these material systems is a tiny fraction of that available for optical communication, and the temporal shape of the quantum optical output pulse is often poorly suited for long-distance transmission. Here we demonstrate that nonlinear mixing of a quantum light pulse with a spectrally tailored classical field can compress the quantum pulse by more than a factor of 100 and flexibly reshape its temporal waveform, while preserving all quantum properties, including entanglement. Waveform conversion can be used with heralded arrays of quantum light emitters to enable quantum communication at the full data rate of optical telecommunications.

  13. Fast Evolution and Waveform Generator for Extreme-Mass-Ratio Inspirals in Equatorial-Circular Orbits

    CERN Document Server

    Han, Wen-Biao

    2016-01-01

    In this paper we discuss the development of a fast and accurate waveform model for the quasi-circular orbital evolution of extreme-mass-ratio-inspirals (EMRIs). This model simply employs the data of a few numerical Teukoulsky-based energy fluxes and waveforms to fit out a set of polynomials for the entire fluxes and waveforms. These obtained polynomials are accurate enough in the entire evolution domain, and much more accurate than the resummation post-Newtonian (PN) energy fluxes and waveforms, especially when the spin of a black hole becomes large. The dynamical equation we adopted for orbital revolution is the effective-one-body (EOB) formalism. Because of the simplified expressions, the efficiency of calculating the orbital evolution with our polynomials is also better than the traditional method which uses the resummed PN analytical fluxes. Our model should be useful in calculation of waveform templates of EMRIs for the gravitational wave detectors such as the evolved Laser Interferometer Space Antenna (...

  14. Electronics via waveform analysis

    CERN Document Server

    Craig, Edwin C

    1993-01-01

    The author believes that a good basic understanding of electronics can be achieved by detailed visual analyses of the actual voltage waveforms present in selected circuits. The voltage waveforms included in this text were photographed using a 35-rrun camera in an attempt to make the book more attractive. This book is intended for the use of students with a variety of backgrounds. For this reason considerable material has been placed in the Appendix for those students who find it useful. The Appendix includes many basic electricity and electronic concepts as well as mathematical derivations that are not vital to the understanding of the circuit being discussed in the text at that time. Also some derivations might be so long that, if included in the text, it could affect the concentration of the student on the circuit being studied. The author has tried to make the book comprehensive enough so that a student could use it as a self-study course, providing one has access to adequate laboratory equipment.

  15. On two conjectures of Faith

    CERN Document Server

    Haim, M; Torrecillas, B

    2011-01-01

    We prove that a profinite algebra whose left (right) cyclic modules are torsionless is finite dimensional and QF. We give a relative version of the notion of left (right) PF ring for pseudocompact algebras and prove it is left-right symmetric and dual to the notion of quasi-co-Frobenius coalgebras. We also prove two ring theoretic conjectures of Faith, in the setting (and supplementary hypothesis) of profinite algebras: any profinite semiartinian selfinjective algebra is finite dimensional and QF, and any FGF profinite algebra is finite dimensional QF.

  16. The Flexibility of Good Faith Concept

    Directory of Open Access Journals (Sweden)

    Camelia IGNATESCU

    2013-12-01

    Full Text Available Concerned with the analysis of the good faith concept, as flexible concept, there are some people who have considered that law compels the judge to look at good faith and justice and usually to reconsider the contractual background in order to discover new commitment susceptible of variations and multiplications during time. In the circumstances that, good faith is an instrument of interpreting contracts, and the judge wonders what it is that the parties, of good faith, could have desired to hire, we understand here the demands of a behavior rule in performing the convention.

  17. Optimizing defibrillation waveforms for ICDs.

    Science.gov (United States)

    Kroll, Mark W; Swerdlow, Charles D

    2007-04-01

    While no simple electrical descriptor provides a good measure of defibrillation efficacy, the waveform parameters that most directly influence defibrillation are voltage and duration. Voltage is a critical parameter for defibrillation because its spatial derivative defines the electrical field that interacts with the heart. Similarly, waveform duration is a critical parameter because the shock interacts with the heart for the duration of the waveform. Shock energy is the most often cited metric of shock strength and an ICD's capacity to defibrillate, but it is not a direct measure of shock effectiveness. Despite the physiological complexities of defibrillation, a simple approach in which the heart is modeled as passive resistor-capacitor (RC) network has proved useful for predicting efficient defibrillation waveforms. The model makes two assumptions: (1) The goal of both a monophasic shock and the first phase of a biphasic shock is to maximize the voltage change in the membrane at the end of the shock for a given stored energy. (2) The goal of the second phase of a biphasic shock is to discharge the membrane back to the zero potential, removing the charge deposited by the first phase. This model predicts that the optimal waveform rises in an exponential upward curve, but such an ascending waveform is difficult to generate efficiently. ICDs use electronically efficient capacitive-discharge waveforms, which require truncation for effective defibrillation. Even with optimal truncation, capacitive-discharge waveforms require more voltage and energy to achieve the same membrane voltage than do square waves and ascending waveforms. In ICDs, the value of the shock output capacitance is a key intermediary in establishing the relationship between stored energy-the key determinant of ICD size-and waveform voltage as a function of time, the key determinant of defibrillation efficacy. The RC model predicts that, for capacitive-discharge waveforms, stored energy is minimized

  18. Where's the Faith in Faith-Based Organizations? Measures and Correlates of Religiosity in Faith-Based Social Service Coalitions

    Science.gov (United States)

    Ebaugh, Helen Rose Fuchs; Saltzman, Janet; Pipes, Paula F.

    2006-01-01

    Organizational religiosity is analyzed with data from a national survey of faith-based social service coalitions (N = 656). Twenty-one items related to religious practices within these organizations result in three distinct factors: service religiosity, staff religiosity and organizational religiosity scales. Self-defined faith-based coalitions…

  19. Waveform analysis of sound

    CERN Document Server

    Tohyama, Mikio

    2015-01-01

    What is this sound? What does that sound indicate? These are two questions frequently heard in daily conversation. Sound results from the vibrations of elastic media and in daily life provides informative signals of events happening in the surrounding environment. In interpreting auditory sensations, the human ear seems particularly good at extracting the signal signatures from sound waves. Although exploring auditory processing schemes may be beyond our capabilities, source signature analysis is a very attractive area in which signal-processing schemes can be developed using mathematical expressions. This book is inspired by such processing schemes and is oriented to signature analysis of waveforms. Most of the examples in the book are taken from data of sound and vibrations; however, the methods and theories are mostly formulated using mathematical expressions rather than by acoustical interpretation. This book might therefore be attractive and informative for scientists, engineers, researchers, and graduat...

  20. Pseudo waveform inversion

    Energy Technology Data Exchange (ETDEWEB)

    Shin, Chang Soo; Park, Keun Pil [Korea Inst. of Geology Mining and Materials, Taejon (Korea, Republic of); Suh, Jung Hee; Hyun, Byung Koo; Shin, Sung Ryul [Seoul National University, Seoul (Korea, Republic of)

    1995-12-01

    The seismic reflection exploration technique which is one of the geophysical methods for oil exploration became effectively to image the subsurface structure with rapid development of computer. However, the imagining of subsurface based on the conventional data processing is almost impossible to obtain the information on physical properties of the subsurface such as velocity and density. Since seismic data are implicitly function of velocities of subsurface, it is necessary to develop the inversion method that can delineate the velocity structure using seismic topography and waveform inversion. As a tool to perform seismic inversion, seismic forward modeling program using ray tracing should be developed. In this study, we have developed the algorithm that calculate the travel time of the complex geologic structure using shooting ray tracing by subdividing the geologic model into blocky structure having the constant velocity. With the travel time calculation, the partial derivatives of travel time can be calculated efficiently without difficulties. Since the current ray tracing technique has a limitation to calculate the travel times for extremely complex geologic model, our aim in the future is to develop the powerful ray tracer using the finite element technique. After applying the pseudo waveform inversion to the seismic data of Korea offshore, we can obtain the subsurface velocity model and use the result in bring up the quality of the seismic data processing. If conventional seismic data processing and seismic interpretation are linked with this inversion technique, the high quality of seismic data processing can be expected to image the structure of the subsurface. Future research area is to develop the powerful ray tracer of ray tracing which can calculate the travel times for the extremely complex geologic model. (author). 39 refs., 32 figs., 2 tabs.

  1. Good Faith, Bad Faith? Making an Effort in Dispute Resolution

    Directory of Open Access Journals (Sweden)

    Tania Sourdin

    2013-12-01

    Full Text Available The behaviour of those engaged in negotiation and Alternative Dispute Resolution (ADR processes that are undertaken or required before or after litigation is increasingly the subject of legislative regulation. Recent case law has also more clearly articulated the characteristics of good faith as well as other standards such as 'genuine effort' and explored to a limited extent the behavioural indicators and approaches that could be used to determine the meaning and scope of these types of concepts. Arguably, the growth in mandatory (rather than voluntary ADR may require the articulation of clearer conduct obligations as ADR participants may be disinclined to negotiate or may be relatively unsophisticated or unaware of their negotiation behaviour. This article explores the development of conduct obligations and notes that whilst the requirements need to be linked to the circumstances of each dispute, there are some clear differences in terms of how these requirements are more generally interpreted by lawyers and others.

  2. Looking Forward from "A Common Faith"

    Science.gov (United States)

    Noddings, Nel

    2009-01-01

    "A Common Faith," according to this author, is arguably one of John Dewey's least effective books. In it, he tries to persuade readers that the best of two epistemologically different worlds can be reconciled in a common faith--one that employs the methods of science with a generously religious attitude. Possibly most people today believe this…

  3. Face to Faith: Teaching Global Citizenship

    Science.gov (United States)

    Beauchamp, Marcia

    2011-01-01

    The Tony Blair Faith Foundation has created a program that enables students to learn directly with, from, and about one another's culture, religion and beliefs. Face to Faith is a state-of-the-art educational program that addresses cross-cultural and inter-religious understanding in the context of study about global issues. The program uses…

  4. Forum: Teaching with, against, and to Faith

    Science.gov (United States)

    Jones Medine, Carolyn M.; Penner, Todd; Lehman, Marjorie

    2015-01-01

    These three articles deal with the issue of faith in the classroom--whether one should teach "to," "for," or "against" faith. While their institutional settings and experiences are different, the authors all contend that more serious reflection needs to be given to the matter of how religious commitment plays out in…

  5. Waveform Catalog, Extreme Mass Ratio Binary (Capture)

    Data.gov (United States)

    National Aeronautics and Space Administration — Numerically-generated gravitational waveforms for circular inspiral into Kerr black holes. These waveforms were developed using Scott Hughes' black hole perturbation...

  6. Multiples waveform inversion

    KAUST Repository

    Zhang, D. L.

    2013-01-01

    To increase the illumination of the subsurface and to eliminate the dependency of FWI on the source wavelet, we propose multiples waveform inversion (MWI) that transforms each hydrophone into a virtual point source with a time history equal to that of the recorded data. These virtual sources are used to numerically generate downgoing wavefields that are correlated with the backprojected surface-related multiples to give the migration image. Since the recorded data are treated as the virtual sources, knowledge of the source wavelet is not required, and the subsurface illumination is greatly enhanced because the entire free surface acts as an extended source compared to the radiation pattern of a traditional point source. Numerical tests on the Marmousi2 model show that the convergence rate and the spatial resolution of MWI is, respectively, faster and more accurate then FWI. The potential pitfall with this method is that the multiples undergo more than one roundtrip to the surface, which increases attenuation and reduces spatial resolution. This can lead to less resolved tomograms compared to conventional FWI. The possible solution is to combine both FWI and MWI in inverting for the subsurface velocity distribution.

  7. NANOPARTICLE OF FAITH ON NURSES INTERVENTIONS

    Directory of Open Access Journals (Sweden)

    Paula Soares Encarnação

    2016-07-01

    Full Text Available The World Health Organization, in recent years has stimulated the development of research studies that have positive implications for the quality of people's health, such as spirituality. This topic discusses the concept of faith as an expression of human spirituality; develops the idea of faith as a “nanoparticle” that can be used in nursing care as an intervention to promote people’s health, and explore the contribution to education in Nursing. Given these findings it is concluded that nurses should require training and develop research studies that demonstrate faith as a protective factor and a health promoter with salutogenic effects in the Portuguese context.

  8. STRS Compliant FPGA Waveform Development

    Science.gov (United States)

    Nappier, Jennifer; Downey, Joseph

    2008-01-01

    The Space Telecommunications Radio System (STRS) Architecture Standard describes a standard for NASA space software defined radios (SDRs). It provides a common framework that can be used to develop and operate a space SDR in a reconfigurable and reprogrammable manner. One goal of the STRS Architecture is to promote waveform reuse among multiple software defined radios. Many space domain waveforms are designed to run in the special signal processing (SSP) hardware. However, the STRS Architecture is currently incomplete in defining a standard for designing waveforms in the SSP hardware. Therefore, the STRS Architecture needs to be extended to encompass waveform development in the SSP hardware. A transmit waveform for space applications was developed to determine ways to extend the STRS Architecture to a field programmable gate array (FPGA). These extensions include a standard hardware abstraction layer for FPGAs and a standard interface between waveform functions running inside a FPGA. Current standards were researched and new standard interfaces were proposed. The implementation of the proposed standard interfaces on a laboratory breadboard SDR will be presented.

  9. Faith and wisdom in science

    CERN Document Server

    McLeish, Tom

    2014-01-01

    "Do you have wisdom to count the clouds?" asks the voice of God from the whirlwind in the stunningly beautiful catalogue of nature-questions from the Old Testament Book of Job. Tom McLeish takes a scientist's reading of this ancient text as a centrepiece to make the case for science as a deeply human and ancient activity, embedded in some of the oldest stories told about human desire to understand the natural world. Drawing on stories from the modern science of chaos and uncertainty alongside medieval, patristic, classical and Biblical sources, Faith and Wisdom in Science challenges much of the current 'science and religion' debate as operating with the wrong assumptions and in the wrong space. Its narrative approach develops a natural critique of the cultural separation of sciences and humanities, suggesting an approach to science, or in its more ancient form natural philosophy - the 'love of wisdom of natural things' - that can draw on theological and cultural roots. Following the theme of pain in human con...

  10. Faith and Form on Screen

    Directory of Open Access Journals (Sweden)

    Henry Bacon

    2016-11-01

    Full Text Available To understand any aspect of being-in-the-world in general or cinematic experience in particular, both reductionist and holistic approaches are needed. Psychological accounts can give us only functional explanations of human behaviour or responses to signifying artifacts such as art. To understand the significance of these experiences the psychological must be complemented by a study on a level which may be termed spiritual. This line of thought is applied to analyses of Robert Bresson’s Pickpocket, starting from David Bordwell’s formalist and cognitive account of why many people experience this film as religious despite there being no explicit reference to religion. Paul Schrader’s analysis of the formal structure of this film in terms of his notion of transcendental style in film goes a step forward by explaining how the formal structure as he analyses it suggests a transcendental dimension which cannot be addressed directly. This approach connects in an illuminating way with Slavoj Žižek’s notions of the imaginary and the symbolic sphere. Bordwell’s approach, functioning on the psychological level, is basically reductionist, while Schrader’s, boosted with Žižek’s ideas as appropriated for the purposes of this article, is holistic and operative on the spiritual level. This two-tiered analysis reveals how cinematic form in Pickpocket serves as an indirect expression of faith.

  11. Teaching Teens To Use Condoms Faithfully

    Science.gov (United States)

    ... Pediatrician Ages & Stages Prenatal Baby Toddler Preschool Gradeschool Teen Dating & Sex Fitness Nutrition Driving Safety School Substance Abuse Young Adult Healthy Children > Ages & Stages > Teen > Dating & Sex > Teaching Teens To Use Condoms Faithfully Ages & Stages ...

  12. Faith-based humanitarianism in northern Myanmar

    Directory of Open Access Journals (Sweden)

    Edward Benson

    2014-11-01

    Full Text Available The response of faith-based organisations to displacement in northern Myanmar has been remarkable but sustaining an open and collaborative relationship with the international community remains an ongoing challenge.

  13. 'divine healing' in the 'faith movement'

    African Journals Online (AJOL)

    2009-12-10

    Dec 10, 2009 ... most forms of cancer, heart disease and genetic diseases. (Wikipedia ... functioning of the healthy body of the patient begins to function ..... It is finished! Amen. .... Renowned faith healer, TL Osborn's wife, Peggy, died of lung.

  14. An improved analysis of GW150914 using a fully spin-precessing waveform model

    CERN Document Server

    Abbott, B P; Abbott, T D; Abernathy, M R; Acernese, F; Ackley, K; Adams, C; Adams, T; Addesso, P; Adhikari, R X; Adya, V B; Affeldt, C; Agathos, M; Agatsuma, K; Aggarwal, N; Aguiar, O D; Aiello, L; Ain, A; Ajith, P; Allen, B; Allocca, A; Altin, P A; Anderson, S B; Anderson, W G; Arai, K; Araya, M C; Arceneaux, C C; Areeda, J S; Arnaud, N; Arun, K G; Ascenzi, S; Ashton, G; Ast, M; Aston, S M; Astone, P; Aufmuth, P; Aulbert, C; Babak, S; Bacon, P; Bader, M K M; Baker, P T; Baldaccini, F; Ballardin, G; Ballmer, S W; Barayoga, J C; Barclay, S E; Barish, B C; Barker, D; Barone, F; Barr, B; Barsotti, L; Barsuglia, M; Barta, D; Bartlett, J; Bartos, I; Bassiri, R; Basti, A; Batch, J C; Baune, C; Bavigadda, V; Bazzan, M; Bejger, M; Bell, A S; Berger, B K; Bergmann, G; Berry, C P L; Bersanetti, D; Bertolini, A; Betzwieser, J; Bhagwat, S; Bhandare, R; Bilenko, I A; Billingsley, G; Birch, J; Birney, R; Birnholtz, O; Biscans, S; Bisht, A; Bitossi, M; Biwer, C; Bizouard, M A; Blackburn, J K; Blair, C D; Blair, D G; Blair, R M; Bloemen, S; Bock, O; Boer, M; Bogaert, G; Bogan, C; Bohe, A; Bond, C; Bondu, F; Bonnand, R; Boom, B A; Bork, R; Boschi, V; Bose, S; Bouffanais, Y; Bozzi, A; Bradaschia, C; Brady, P R; Braginsky, V B; Branchesi, M; Brau, J E; Briant, T; Brillet, A; Brinkmann, M; Brisson, V; Brockill, P; Broida, J E; Brooks, A F; Brown, D A; Brown, D D; Brown, N M; Brunett, S; Buchanan, C C; Buikema, A; Bulik, T; Bulten, H J; Buonanno, A; Buskulic, D; Buy, C; Byer, R L; Cabero, M; Cadonati, L; Cagnoli, G; Cahillane, C; Bustillo, J Calder'on; Callister, T; Calloni, E; Camp, J B; Cannon, K C; Cao, J; Capano, C D; Capocasa, E; Carbognani, F; Caride, S; Diaz, J Casanueva; Casentini, C; Caudill, S; Cavagli`a, M; Cavalier, F; Cavalieri, R; Cella, G; Cepeda, C B; Baiardi, L Cerboni; Cerretani, G; Cesarini, E; Chan, M; Chao, S; Charlton, P; Chassande-Mottin, E; Cheeseboro, B D; Chen, H Y; Chen, Y; Cheng, C; Chincarini, A; Chiummo, A; Cho, H S; Cho, M; Chow, J H; Christensen, N; Chu, Q; Chua, S; Chung, S; Ciani, G; Clara, F; Clark, J A; Cleva, F; Coccia, E; Cohadon, P -F; Colla, A; Collette, C G; Cominsky, L; Constancio, M; Conte, A; Conti, L; Cook, D; Corbitt, T R; Cornish, N; Corsi, A; Cortese, S; Costa, C A; Coughlin, M W; Coughlin, S B; Coulon, J -P; Countryman, S T; Couvares, P; Cowan, E E; Coward, D M; Cowart, M J; Coyne, D C; Coyne, R; Craig, K; Creighton, J D E; Cripe, J; Crowder, S G; Cumming, A; Cunningham, L; Cuoco, E; Canton, T Dal; Danilishin, S L; D'Antonio, S; Danzmann, K; Darman, N S; Dasgupta, A; Costa, C F Da Silva; Dattilo, V; Dave, I; Davier, M; Davies, G S; Daw, E J; Day, R; De, S; DeBra, D; Debreczeni, G; Degallaix, J; De Laurentis, M; Del'eglise, S; Del Pozzo, W; Denker, T; Dent, T; Dergachev, V; De Rosa, R; DeRosa, R T; DeSalvo, R; Devine, R C; Dhurandhar, S; D'iaz, M C; Di Fiore, L; Di Giovanni, M; Di Girolamo, T; Di Lieto, A; Di Pace, S; Di Palma, I; Di Virgilio, A; Dolique, V; Donovan, F; Dooley, K L; Doravari, S; Douglas, R; Downes, T P; Drago, M; Drever, R W P; Driggers, J C; Ducrot, M; Dwyer, S E; Edo, T B; Edwards, M C; Effler, A; Eggenstein, H -B; Ehrens, P; Eichholz, J; Eikenberry, S S; Engels, W; Essick, R C; Etienne, Z; Etzel, T; Evans, M; Evans, T M; Everett, R; Factourovich, M; Fafone, V; Fair, H; Fairhurst, S; Fan, X; Fang, Q; Farinon, S; Farr, B; Farr, W M; Fauchon-Jones, E; Favata, M; Fays, M; Fehrmann, H; Fejer, M M; Fenyvesi, E; Ferrante, I; Ferreira, E C; Ferrini, F; Fidecaro, F; Fiori, I; Fiorucci, D; Fisher, R P; Flaminio, R; Fletcher, M; Fournier, J -D; Frasca, S; Frasconi, F; Frei, Z; Freise, A; Frey, R; Frey, V; Fritschel, P; Frolov, V V; Fulda, P; Fyffe, M; Gabbard, H A G; Gaebel, S; Gair, J R; Gammaitoni, L; Gaonkar, S G; Garufi, F; Gaur, G; Gehrels, N; Gemme, G; Geng, P; Genin, E; Gennai, A; George, J; Gergely, L; Germain, V; Ghosh, Abhirup; Ghosh, Archisman; Ghosh, S; Giaime, J A; Giardina, K D; Giazotto, A; Gill, K; Glaefke, A; Goetz, E; Goetz, R; Gondan, L; Gonz'alez, G; Castro, J M Gonzalez; Gopakumar, A; Gordon, N A; Gorodetsky, M L; Gossan, S E; Gosselin, M; Gouaty, R; Grado, A; Graef, C; Graff, P B; Granata, M; Grant, A; Gras, S; Gray, C; Greco, G; Green, A C; Groot, P; Grote, H; Grunewald, S; Guidi, G M; Guo, X; Gupta, A; Gupta, M K; Gushwa, K E; Gustafson, E K; Gustafson, R; Haas, R; Hacker, J J; Hall, B R; Hall, E D; Hammond, G; Haney, M; Hanke, M M; Hanks, J; Hanna, C; Hannam, M D; Hanson, J; Hardwick, T; Harms, J; Harry, G M; Harry, I W; Hart, M J; Hartman, M T; Haster, C -J; Haughian, K; Healy, J; Heidmann, A; Heintze, M C; Heitmann, H; Hello, P; Hemming, G; Hendry, M; Heng, I S; Hennig, J; Henry, J; Heptonstall, A W; Heurs, M; Hild, S; Hinder, I; Hoak, D; Hofman, D; Holt, K; Holz, D E; Hopkins, P; Hough, J; Houston, E A; Howell, E J; Hu, Y M; Huang, S; Huerta, E A; Huet, D; Hughey, B; Husa, S; Huttner, S H; Huynh-Dinh, T; Indik, N; Ingram, D R; Inta, R; Isa, H N; Isac, J -M; Isi, M; Isogai, T; Iyer, B R; Izumi, K; Jacqmin, T; Jang, H; Jani, K; Jaranowski, P; Jawahar, S; Jian, L; Jim'enez-Forteza, F; Johnson, W W; Johnson-McDaniel, N K; Jones, D I; Jones, R; Jonker, R J G; Ju, L; K, Haris; Kalaghatgi, C V; Kalogera, V; Kandhasamy, S; Kang, G; Kanner, J B; Kapadia, S J; Karki, S; Karvinen, K S; Kasprzack, M; Katsavounidis, E; Katzman, W; Kaufer, S; Kaur, T; Kawabe, K; K'ef'elian, F; Kehl, M S; Keitel, D; Kelley, D B; Kells, W; Kennedy, R; Key, J S; Khalili, F Y; Khan, I; Khan, S; Khan, Z; Khazanov, E A; Kijbunchoo, N; Kim, Chi-Woong; Kim, Chunglee; Kim, J; Kim, K; Kim, N; Kim, W; Kim, Y -M; Kimbrell, S J; King, E J; King, P J; Kissel, J S; Klein, B; Kleybolte, L; Klimenko, S; Koehlenbeck, S M; Koley, S; Kondrashov, V; Kontos, A; Korobko, M; Korth, W Z; Kowalska, I; Kozak, D B; Kringel, V; Krishnan, B; Kr'olak, A; Krueger, C; Kuehn, G; Kumar, P; Kumar, R; Kuo, L; Kutynia, A; Lackey, B D; Landry, M; Lange, J; Lantz, B; Lasky, P D; Laxen, M; Lazzarini, A; Lazzaro, C; Leaci, P; Leavey, S; Lebigot, E O; Lee, C H; Lee, H K; Lee, H M; Lee, K; Lenon, A; Leonardi, M; Leong, J R; Leroy, N; Letendre, N; Levin, Y; Lewis, J B; Li, T G F; Libson, A; Littenberg, T B; Lockerbie, N A; Lombardi, A L; London, L T; Lord, J E; Lorenzini, M; Loriette, V; Lormand, M; Losurdo, G; Lough, J D; Lousto, C O; Lovelace, G; L"uck, H; Lundgren, A P; Lynch, R; Ma, Y; Machenschalk, B; MacInnis, M; Macleod, D M; Magana-Sandoval, F; Zertuche, L Magana; Magee, R M; Majorana, E; Maksimovic, I; Malvezzi, V; Man, N; Mandic, V; Mangano, V; Mansell, G L; Manske, M; Mantovani, M; Marchesoni, F; Marion, F; M'arka, S; M'arka, Z; Markosyan, A S; Maros, E; Martelli, F; Martellini, L; Martin, I W; Martynov, D V; Marx, J N; Mason, K; Masserot, A; Massinger, T J; Masso-Reid, M; Mastrogiovanni, S; Matichard, F; Matone, L; Mavalvala, N; Mazumder, N; McCarthy, R; McClelland, D E; McCormick, S; McGuire, S C; McIntyre, G; McIver, J; McManus, D J; McRae, T; McWilliams, S T; Meacher, D; Meadors, G D; Meidam, J; Melatos, A; Mendell, G; Mercer, R A; Merilh, E L; Merzougui, M; Meshkov, S; Messenger, C; Messick, C; Metzdorff, R; Meyers, P M; Mezzani, F; Miao, H; Michel, C; Middleton, H; Mikhailov, E E; Milano, L; Miller, A L; Miller, A; Miller, B B; Miller, J; Millhouse, M; Minenkov, Y; Ming, J; Mirshekari, S; Mishra, C; Mitra, S; Mitrofanov, V P; Mitselmakher, G; Mittleman, R; Moggi, A; Mohan, M; Mohapatra, S R P; Montani, M; Moore, B C; Moore, C J; Moraru, D; Moreno, G; Morriss, S R; Mossavi, K; Mours, B; Mow-Lowry, C M; Mueller, G; Muir, A W; Mukherjee, Arunava; Mukherjee, D; Mukherjee, S; Mukund, N; Mullavey, A; Munch, J; Murphy, D J; Murray, P G; Mytidis, A; Nardecchia, I; Naticchioni, L; Nayak, R K; Nedkova, K; Nelemans, G; Nelson, T J N; Neri, M; Neunzert, A; Newton, G; Nguyen, T T; Nielsen, A B; Nissanke, S; Nitz, A; Nocera, F; Nolting, D; Normandin, M E N; Nuttall, L K; Oberling, J; Ochsner, E; O'Dell, J; Oelker, E; Ogin, G H; Oh, J J; Oh, S H; Ohme, F; Oliver, M; Oppermann, P; Oram, Richard J; O'Reilly, B; O'Shaughnessy, R; Ottaway, D J; Overmier, H; Owen, B J; Pai, A; Pai, S A; Palamos, J R; Palashov, O; Palomba, C; Pal-Singh, A; Pan, H; Pankow, C; Pannarale, F; Pant, B C; Paoletti, F; Paoli, A; Papa, M A; Paris, H R; Parker, W; Pascucci, D; Pasqualetti, A; Passaquieti, R; Passuello, D; Patricelli, B; Patrick, Z; Pearlstone, B L; Pedraza, M; Pedurand, R; Pekowsky, L; Pele, A; Penn, S; Perreca, A; Perri, L M; Pfeiffer, H P; Phelps, M; Piccinni, O J; Pichot, M; Piergiovanni, F; Pierro, V; Pillant, G; Pinard, L; Pinto, I M; Pitkin, M; Poe, M; Poggiani, R; Popolizio, P; Post, A; Powell, J; Prasad, J; Predoi, V; Prestegard, T; Price, L R; Prijatelj, M; Principe, M; Privitera, S; Prix, R; Prodi, G A; Prokhorov, L; Puncken, O; Punturo, M; Puppo, P; P"urrer, M; Qi, H; Qin, J; Qiu, S; Quetschke, V; Quintero, E A; Quitzow-James, R; Raab, F J; Rabeling, D S; Radkins, H; Raffai, P; Raja, S; Rajan, C; Rakhmanov, M; Rapagnani, P; Raymond, V; Razzano, M; Re, V; Read, J; Reed, C M; Regimbau, T; Rei, L; Reid, S; Reitze, D H; Rew, H; Reyes, S D; Ricci, F; Riles, K; Rizzo, M; Robertson, N A; Robie, R; Robinet, F; Rocchi, A; Rolland, L; Rollins, J G; Roma, V J; Romano, J D; Romano, R; Romanov, G; Romie, J H; Rosi'nska, D; Rowan, S; R"udiger, A; Ruggi, P; Ryan, K; Sachdev, S; Sadecki, T; Sadeghian, L; Sakellariadou, M; Salconi, L; Saleem, M; Salemi, F; Samajdar, A; Sammut, L; Sanchez, E J; Sandberg, V; Sandeen, B; Sanders, J R; Sassolas, B; Sathyaprakash, B S; Saulson, P R; Sauter, O E S; Savage, R L; Sawadsky, A; Schale, P; Schilling, R; Schmidt, J; Schmidt, P; Schnabel, R; Schofield, R M S; Sch"onbeck, A; Schreiber, E; Schuette, D; Schutz, B F; Scott, J; Scott, S M; Sellers, D; Sengupta, A S; Sentenac, D; Sequino, V; Sergeev, A; Setyawati, Y; Shaddock, D A; Shaffer, T; Shahriar, M S; Shaltev, M; Shapiro, B; Shawhan, P; Sheperd, A; Shoemaker, D H; Shoemaker, D M; Siellez, K; Siemens, X; Sieniawska, M; Sigg, D; Silva, A D; Singer, A; Singer, L P; Singh, A; Singh, R; Singhal, A; Sintes, A M; Slagmolen, B J J; Smith, J R; Smith, N D; Smith, R J E; Son, E J; Sorazu, B; Sorrentino, F; Souradeep, T; Srivastava, A K; Staley, A; Steinke, M; Steinlechner, J; Steinlechner, S; Steinmeyer, D; Stephens, B C; Stevenson, S P; Stone, R; Strain, K A; Straniero, N; Stratta, G; Strauss, N A; Strigin, S; Sturani, R; Stuver, A L; Summerscales, T Z; Sun, L; Sunil, S; Sutton, P J; Swinkels, B L; Szczepa'nczyk, M J; Tacca, M; Talukder, D; Tanner, D B; T'apai, M; Tarabrin, S P; Taracchini, A; Taylor, R; Theeg, T; Thirugnanasambandam, M P; Thomas, E G; Thomas, M; Thomas, P; Thorne, K A; Thorne, K S; Thrane, E; Tiwari, S; Tiwari, V; Tokmakov, K V; Toland, K; Tomlinson, C; Tonelli, M; Tornasi, Z; Torres, C V; Torrie, C I; T"oyr"a, D; Travasso, F; Traylor, G; Trifir`o, D; Tringali, M C; Trozzo, L; Tse, M; Turconi, M; Tuyenbayev, D; Ugolini, D; Unnikrishnan, C S; Urban, A L; Usman, S A; Vahlbruch, H; Vajente, G; Valdes, G; Vallisneri, M; van Bakel, N; van Beuzekom, M; Brand, J F J van den; Broeck, C Van Den; Vander-Hyde, D C; van der Schaaf, L; van der Sluys, M V; van Heijningen, J V; Vano-Vinuales, A; van Veggel, A A; Vardaro, M; Vass, S; Vas'uth, M; Vaulin, R; Vecchio, A; Vedovato, G; Veitch, J; Veitch, P J; Venkateswara, K; Verkindt, D; Vetrano, F; Vicer'e, A; Vinciguerra, S; Vine, D J; Vinet, J -Y; Vitale, S; Vo, T; Vocca, H; Vorvick, C; Voss, D V; Vousden, W D; Vyatchanin, S P; Wade, A R; Wade, L E; Wade, M; Walker, M; Wallace, L; Walsh, S; Wang, G; Wang, H; Wang, M; Wang, X; Wang, Y; Ward, R L; Warner, J; Was, M; Weaver, B; Wei, L -W; Weinert, M; Weinstein, A J; Weiss, R; Wen, L; Wessels, P; Westphal, T; Wette, K; Whelan, J T; Whiting, B F; Williams, R D; Williamson, A R; Willis, J L; Willke, B; Wimmer, M H; Winkler, W; Wipf, C C; Wittel, H; Woan, G; Woehler, J; Worden, J; Wright, J L; Wu, D S; Wu, G; Yablon, J; Yam, W; Yamamoto, H; Yancey, C C; Yu, H; Yvert, M; zny, A Zadro; Zangrando, L; Zanolin, M; Zendri, J -P; Zevin, M; Zhang, L; Zhang, M; Zhang, Y; Zhao, C; Zhou, M; Zhou, Z; Zhu, X J; Zucker, M E; Zuraw, S E; Zweizig, J

    2016-01-01

    This paper presents updated estimates of source parameters for GW150914, a binary black-hole coalescence event detected by the Laser Interferometer Gravitational-wave Observatory (LIGO) on September 14, 2015 [1]. Reference presented parameter estimation [2] of the source using a 13-dimensional, phenomenological precessing-spin model (precessing IMRPhenom) and a 11-dimensional nonprecessing effective-one-body (EOB) model calibrated to numerical-relativity simulations, which forces spin alignment (nonprecessing EOBNR). Here we present new results that include a 15-dimensional precessing-spin waveform model (precessing EOBNR) developed within the EOB formalism. We find good agreement with the parameters estimated previously [2], and we quote updated component masses of $35^{+5}_{-3}\\mathrm{M}_\\odot$ and $30^{+3}_{-4}\\mathrm{M}_\\odot$ (where errors correspond to 90% symmetric credible intervals). We also present slightly tighter constraints on the dimensionless spin magnitudes of the two black holes, with a prima...

  15. Waveform-dependent absorbing metasurfaces

    CERN Document Server

    Wakatsuchi, Hiroki; Rushton, Jeremiah J; Sievenpiper, Daniel F

    2014-01-01

    We present the first use of a waveform-dependent absorbing metasurface for high-power pulsed surface currents. The new type of nonlinear metasurface, composed of circuit elements including diodes, is capable of storing high power pulse energy to dissipate it between pulses, while allowing propagation of small signals. Interestingly, the absorbing performance varies for high power pulses but not for high power continuous waves (CWs), since the capacitors used are fully charged up. Thus, the waveform dependence enables us to distinguish various signal types (i.e. CW or pulse) even at the same frequency, which potentially creates new kinds of microwave technologies and applications.

  16. The Crossroads of Science and Faith

    Science.gov (United States)

    Benecchi, Susan D.; Kober, Gladys; Gossard, Paula

    2015-11-01

    We have recently completed a 4-year project to produce a textbook for students that uniquely addresses the needs of the Christian homeschool community. It is also relevant for students of other faith and non-faith backgrounds. Two elements are at work: parents want their kids to become mature adults adhering to the faith of their upbringing, and students are challenged when they don't understand how to rationally discuss their beliefs in relation to many current scientific discoveries. To add to the polarization, a few scientists have spread an atheistic naturalistic worldview together with their teaching of science as if it was part of science itself. As a result many parents avoid materials they consider controversial and students later come to believe they must choose between science and their faith. The key to bridging this gap are professional astronomers who hold to a Christian worldview and who can speak both languages, understanding the complexities of both communities. The role of science educators is to teach science, not to impose worldviews. Science is well received by Christians when it is presented not as a threat to faith, but rather as a complementary way to understand God, leading to a more integrated view of reality. Our textbook boasts four hallmarks, providing students with: 1) An understanding of the relationship between faith and science with the goal of helping students to identify and integrate their own worldview. 2) Scientifically reviewed and accurate astronomical information. 3) Examples of scientists who have wrestled with science/faith issues and come to a coherent relationship between the two. And 4) exercises for the students to interact with the material in both faith and scientific areas. We hope this will be a resource to help parents who hold tightly to particular ideologies to be less closed to current scientific discovery and more excited about how new discoveries can bolster and enable their faith. We will present an overview

  17. Faith in science in global perspective: Implications for transhumanism.

    Science.gov (United States)

    Evans, John H

    2014-10-01

    While citizens can know scientific facts, they also have faith in science - with faith defined as a firm belief for which there is no proof. Using national public opinion surveys from twelve nations from 1993 to 2010, I examine three different types of faith in science that citizens could hold. I examine temporal changes in levels of faith in science as well as the social determinants of each type of faith. I focus on the implications of these levels of faith for the transhumanist movement, which is particularly dependent on faith in science. I find that two of three types of faith in science are on the rise across the West, and that the social determinants of these types of faith suggest particular challenges for the transhumanist movement.

  18. An MSK Waveform for Radar Applications

    Science.gov (United States)

    Quirk, Kevin J.; Srinivasan, Meera

    2009-01-01

    We introduce a minimum shift keying (MSK) waveform developed for use in radar applications. This waveform is characterized in terms of its spectrum, autocorrelation, and ambiguity function, and is compared with the conventionally used bi-phase coded (BPC) radar signal. It is shown that the MSK waveform has several advantages when compared with the BPC waveform, and is a better candidate for deep-space radar imaging systems such as NASA's Goldstone Solar System Radar.

  19. Radar Waveform Design in Active Communications Channel

    OpenAIRE

    Ric A. Romero; Shepherd, Kevin D.

    2013-01-01

    In this paper, we investigate spectrally adaptive radar transmit waveform design and its effects on an active communication system. We specifically look at waveform design for point targets. The transmit waveform is optimized by accounting for the modulation spectrum of the communication system while trying to efficiently use the remaining spectrum. With the use of spectrally-matched radar waveform, we show that the SER detection performance of the communication system ...

  20. Generating nonlinear FM chirp waveforms for radar.

    Energy Technology Data Exchange (ETDEWEB)

    Doerry, Armin Walter

    2006-09-01

    Nonlinear FM waveforms offer a radar matched filter output with inherently low range sidelobes. This yields a 1-2 dB advantage in Signal-to-Noise Ratio over the output of a Linear FM waveform with equivalent sidelobe filtering. This report presents design and implementation techniques for Nonlinear FM waveforms.

  1. Zambia: Multi-Faith Religious Education?

    Science.gov (United States)

    Carmody, Brendan

    2006-01-01

    As countries' populations become more religiously diverse, a need to review the religious education syllabus that operates is often perceived. One such country is Zambia, which was not only traditionally religiously diverse but has become even more so with the advent of Christianity, Islam and Hinduism and other non-African faiths. This article…

  2. President Bush's Faith-Based & Community Initiative.

    Science.gov (United States)

    White House Office of Faith-Based and Community Initiatives, Washington, DC.

    Despite efforts by the federal and state governments to battle social distress, there are many people who still suffer from poverty and despair. People are calling out for help. For years, faith-based and community groups have been assisting these people and others in need. The federal government has not often been a willing partner to these…

  3. Faith action on urban social issues

    NARCIS (Netherlands)

    Beaumont, J.R.

    2008-01-01

    What evidence supports or refutes the claim articulated from various quarters that faith-based organisations (FBOs) have been repositioned as actors for combating social problems like poverty and social exclusion in cities? This paper explores FBOs as agents of social change in contemporary cities i

  4. Associations between faith, distress and mental adjustment

    DEFF Research Database (Denmark)

    Johannessen-Henry, Christine Tind

    2013-01-01

    ), specific aspects of faith ('belief in a god', 'belief in a god with whom I can talk' and 'experiences of god or a higher power'), religious community and church attendance (DUREL), distress (POMS-SF), adjustment to cancer (Mini-MAC) and sociodemographic factors. Linear regression models were used...

  5. Restoring faith in politics from deliberation

    Directory of Open Access Journals (Sweden)

    Quim Brugué

    2012-04-01

    Full Text Available Politics is in difficulties. It is constantly blamed by people, who also require it to respond. The world is increasingly complex and diverse, and politics is needed to facilitate the continuity of a civilized community. The article defines the conceptual and operative bases of deliberative democracy, which is interpreted as the way to restore faith in politics.

  6. First Footing Inter-Faith Dialogue

    Science.gov (United States)

    Luby, Antony

    2014-01-01

    This article examines an action research project on inter-faith dialogue within the sensitive context of Catholic pupils being taught Catholic religious education in state-funded secondary schools. Twenty pupils in S3 and S4 (Year 10 and Year 11) participated in a series of three paired conversations that focused primarily on science and religion,…

  7. 42 CFR 93.210 - Good faith.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 1 2010-10-01 2010-10-01 false Good faith. 93.210 Section 93.210 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES HEALTH ASSESSMENTS AND HEALTH EFFECTS STUDIES OF HAZARDOUS SUBSTANCES RELEASES AND FACILITIES PUBLIC HEALTH SERVICE POLICIES ON...

  8. Spirituality in Counseling: A Faith Development Perspective

    Science.gov (United States)

    Parker, Stephen

    2011-01-01

    This article describes the use of Fowler's (1981) faith development theory (FDT) in counseling. FDT is a stage model of spiritual and religious development that allows counselors to identify both adaptive qualities and potential encumbrances in spiritual or religious expression. FDT offers a nonsectarian model of spiritual growth that permits…

  9. Faith-Based Partnerships Promoting Health

    Science.gov (United States)

    Rowland, Michael L.; Chappel-Aiken, Lolita

    2012-01-01

    Churches or, as they are now more commonly referred to in some circles, faith-based organizations (FBOs), have a rich tradition of providing not only religious but educational and social service opportunities for their congregations and local community. Social service agencies, health care agencies, and educational institutions have long realized…

  10. Predicting Faculty Integration of Faith and Learning

    Science.gov (United States)

    Kaul, Corina R.; Hardin, Kimberly A.; Beaujean, A. Alexander

    2017-01-01

    Concern regarding the secularization of Christian higher education has prompted researchers to investigate the extent that faith and learning is integrated at a faculty level and what factors might predict faculty integration (Lyon, Beaty, Parker, & Mencken, 2005). This research attempted to replicate Lyon et al.'s (2005) logistic regression…

  11. Faith-Based Partnerships Promoting Health

    Science.gov (United States)

    Rowland, Michael L.; Chappel-Aiken, Lolita

    2012-01-01

    Churches or, as they are now more commonly referred to in some circles, faith-based organizations (FBOs), have a rich tradition of providing not only religious but educational and social service opportunities for their congregations and local community. Social service agencies, health care agencies, and educational institutions have long realized…

  12. Zambia: Multi-Faith Religious Education?

    Science.gov (United States)

    Carmody, Brendan

    2006-01-01

    As countries' populations become more religiously diverse, a need to review the religious education syllabus that operates is often perceived. One such country is Zambia, which was not only traditionally religiously diverse but has become even more so with the advent of Christianity, Islam and Hinduism and other non-African faiths. This article…

  13. ‘Welcoming the stranger’ and UNHCR’s cooperation with faith-based organisations

    Directory of Open Access Journals (Sweden)

    José Riera

    2014-11-01

    Full Text Available Since its creation in 1950, UNHCR has engaged with faith-based organisations, faith communities and faith leaders in carrying out its work. Recently, UNHCR has been more actively exploring the role of faith in humanitarian responses.

  14. Workflows for Full Waveform Inversions

    Science.gov (United States)

    Boehm, Christian; Krischer, Lion; Afanasiev, Michael; van Driel, Martin; May, Dave A.; Rietmann, Max; Fichtner, Andreas

    2017-04-01

    Despite many theoretical advances and the increasing availability of high-performance computing clusters, full seismic waveform inversions still face considerable challenges regarding data and workflow management. While the community has access to solvers which can harness modern heterogeneous computing architectures, the computational bottleneck has fallen to these often manpower-bounded issues that need to be overcome to facilitate further progress. Modern inversions involve huge amounts of data and require a tight integration between numerical PDE solvers, data acquisition and processing systems, nonlinear optimization libraries, and job orchestration frameworks. To this end we created a set of libraries and applications revolving around Salvus (http://salvus.io), a novel software package designed to solve large-scale full waveform inverse problems. This presentation focuses on solving passive source seismic full waveform inversions from local to global scales with Salvus. We discuss (i) design choices for the aforementioned components required for full waveform modeling and inversion, (ii) their implementation in the Salvus framework, and (iii) how it is all tied together by a usable workflow system. We combine state-of-the-art algorithms ranging from high-order finite-element solutions of the wave equation to quasi-Newton optimization algorithms using trust-region methods that can handle inexact derivatives. All is steered by an automated interactive graph-based workflow framework capable of orchestrating all necessary pieces. This naturally facilitates the creation of new Earth models and hopefully sparks new scientific insights. Additionally, and even more importantly, it enhances reproducibility and reliability of the final results.

  15. Why Waveform Correlation Sometimes Fails

    Science.gov (United States)

    Carmichael, J.

    2015-12-01

    Waveform correlation detectors used in explosion monitoring scan noisy geophysical data to test two competing hypotheses: either (1) an amplitude-scaled version of a template waveform is present, or, (2) no signal is present at all. In reality, geophysical wavefields that are monitored for explosion signatures include waveforms produced by non-target sources that are partially correlated with the waveform template. Such signals can falsely trigger correlation detectors, particularly at low thresholds required to monitor for smaller target explosions. This challenge is particularly formidable when monitoring known test sites for seismic disturbances, since uncatalogued natural seismicity is (generally) more prevalent at lower magnitudes, and could be mistaken for small explosions. To address these challenges, we identify real examples in which correlation detectors targeting explosions falsely trigger on both site-proximal earthquakes (Figure 1, below) and microseismic "noise". Motivated by these examples, we quantify performance loss when applying these detectors, and re-evaluate the correlation-detector's hypothesis test. We thereby derive new detectors from more general hypotheses that admit unknown background seismicity, and apply these to real data. From our treatment, we derive "rules of thumb'' for proper template and threshold selection in heavily cluttered signal environments. Last, we answer the question "what is the probability of falsely detecting an earthquake collocated at a test site?", using correlation detectors that include explosion-triggered templates. Figure Top: An eight-channel data stream (black) recorded from an earthquake near a mine. Red markers indicate a detection. Middle: The correlation statistic computed by scanning the template against the data stream at top. The red line indicates the threshold for event declaration, determined by a false-alarm on noise probability constraint, as computed from the signal-absent distribution using

  16. On Faith and Love in Marriage of Othello

    Institute of Scientific and Technical Information of China (English)

    李宁

    2014-01-01

    Othello is a good reflection of trust, distrust, and mistrust.This paper proves marriage based on distrust dooms to fail by analyzing Othello and Desdemona’s marriage.Based on strong faith and love, their marriage is happy, but when faith is destroyed, even love still exists, life cannot be harmonious and peaceful, Amarriage bonds were broken with the loss of faith.

  17. Faith and Sexual Orientation Identity Development in Gay College Men

    Science.gov (United States)

    Dunn, Merrily; Glassmann, Danny; Garrett, J. Matthew; Badaszewski, Philip; Jones, Ginny; Pierre, Darren; Fresk, Kara; Young, Dallin; Correll-Hughes, Larry

    2015-01-01

    This study examines the experiences of gay-identified college men related to their faith and sexual orientation identity development. The findings suggest that for gay-identified college men, faith and sexual orientation identity development includes examination of one's faith and sexual orientation identity, important relationships, and a desire…

  18. 7 CFR 1779.3 - Full faith and credit.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 12 2010-01-01 2010-01-01 false Full faith and credit. 1779.3 Section 1779.3... AGRICULTURE (CONTINUED) WATER AND WASTE DISPOSAL PROGRAMS GUARANTEED LOANS § 1779.3 Full faith and credit. The Loan Note Guarantee constitutes an obligation supported by the full faith and credit of the United...

  19. 7 CFR 1980.308 - Full faith and credit.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 14 2010-01-01 2009-01-01 true Full faith and credit. 1980.308 Section 1980.308...) PROGRAM REGULATIONS (CONTINUED) GENERAL Rural Housing Loans § 1980.308 Full faith and credit. The loan note guarantee constitutes an obligation supported by the full faith and credit of the United States...

  20. 49 CFR 218.97 - Good faith challenge procedures.

    Science.gov (United States)

    2010-10-01

    ... normal business hours. (2) A copy of any written good faith challenge verification decision, made in... 49 Transportation 4 2010-10-01 2010-10-01 false Good faith challenge procedures. 218.97 Section... Derails § 218.97 Good faith challenge procedures. (a) Employee responsibility. An employee shall...

  1. Faith and Sexual Orientation Identity Development in Gay College Men

    Science.gov (United States)

    Dunn, Merrily; Glassmann, Danny; Garrett, J. Matthew; Badaszewski, Philip; Jones, Ginny; Pierre, Darren; Fresk, Kara; Young, Dallin; Correll-Hughes, Larry

    2015-01-01

    This study examines the experiences of gay-identified college men related to their faith and sexual orientation identity development. The findings suggest that for gay-identified college men, faith and sexual orientation identity development includes examination of one's faith and sexual orientation identity, important relationships, and a desire…

  2. Phenomenological gravitational waveforms from spinning coalescing binaries

    CERN Document Server

    Sturani, R; Cadonati, L; Guidi, G M; Healy, J; Shoemaker, D; Vicere', A

    2010-01-01

    An accurate knowledge of the coalescing binary gravitational waveform is crucial for match filtering techniques, which are currently used in the observational searches performed by the LIGO-Virgo collaboration. Following an earlier paper by the same authors we expose the construction of analytical phenomenological waveforms describing the signal sourced by generically spinning binary systems. The gap between the initial inspiral part of the waveform, described by spin-Taylor approximants, and its final ring-down part, described by damped exponentials, is bridged by a phenomenological phase calibrated by comparison with the dominant spherical harmonic mode of a set of waveforms including both numerical and phenomenological waveforms of a different type. All waveforms considered describe equal mass systems with dimension-less spin magnitudes equal to 0.6. The noise-weighted overlap integral between numerical and phenomenological waveforms ranges between 0.93 and 0.98 for a wide span of mass values.

  3. Small mass plunging into a Kerr black hole: Anatomy of the inspiral-merger-ringdown waveforms

    CERN Document Server

    Taracchini, Andrea; Khanna, Gaurav; Hughes, Scott A

    2014-01-01

    We numerically solve the Teukolsky equation in the time domain to obtain the gravitational-wave emission of a small mass inspiraling and plunging into the equatorial plane of a Kerr black hole. We account for the dissipation of orbital energy using the Teukolsky frequency-domain gravitational-wave fluxes for circular, equatorial orbits, down to the light-ring. We consider Kerr spins $-0.99 \\leq q \\leq 0.99$, and compute the inspiral-merger-ringdown (2,2), (2,1), (3,3), (3,2), (4,4), and (5,5) modes. We study the large-spin regime, and find a great simplicity in the merger waveforms, thanks to the extremely circular character of the plunging orbits. We also quantitatively examine the mixing of quasinormal modes during the ringdown, which induces complicated amplitude and frequency modulations in the waveforms. Finally, we explain how the study of small mass-ratio black-hole binaries helps extending effective-one-body models for comparable-mass, spinning black-hole binaries to any mass ratio and spin magnitude.

  4. Improved Analysis of GW150914 Using a Fully Spin-Precessing Waveform Model

    Science.gov (United States)

    Abbott, B. P.; Abbott, R.; Abbott, T. D.; Abernathy, M. R.; Acernese, F.; Ackley, K.; Adams, C.; Adams, T.; Addesso, P.; Adhikari, R. X.; Adya, V. B.; Affeldt, C.; Agathos, M.; Agatsuma, K.; Aggarwal, N.; Aguiar, O. D.; Aiello, L.; Ain, A.; Ajith, P.; Allen, B.; Allocca, A.; Altin, P. A.; Anderson, S. B.; Anderson, W. G.; Arai, K.; Araya, M. C.; Arceneaux, C. C.; Areeda, J. S.; Arnaud, N.; Arun, K. G.; Ascenzi, S.; Ashton, G.; Ast, M.; Aston, S. M.; Astone, P.; Aufmuth, P.; Aulbert, C.; Babak, S.; Bacon, P.; Bader, M. K. M.; Baker, P. T.; Baldaccini, F.; Ballardin, G.; Ballmer, S. W.; Barayoga, J. C.; Barclay, S. E.; Barish, B. C.; Barker, D.; Barone, F.; Barr, B.; Barsotti, L.; Barsuglia, M.; Barta, D.; Bartlett, J.; Bartos, I.; Bassiri, R.; Basti, A.; Batch, J. C.; Baune, C.; Bavigadda, V.; Bazzan, M.; Bejger, M.; Bell, A. S.; Berger, B. K.; Bergmann, G.; Berry, C. P. L.; Bersanetti, D.; Bertolini, A.; Betzwieser, J.; Bhagwat, S.; Bhandare, R.; Bilenko, I. A.; Billingsley, G.; Birch, J.; Birney, R.; Birnholtz, O.; Biscans, S.; Bisht, A.; Bitossi, M.; Biwer, C.; Bizouard, M. A.; Blackburn, J. K.; Blair, C. D.; Blair, D. G.; Blair, R. M.; Bloemen, S.; Bock, O.; Boer, M.; Bogaert, G.; Bogan, C.; Bohe, A.; Bond, C.; Bondu, F.; Bonnand, R.; Boom, B. A.; Bork, R.; Boschi, V.; Bose, S.; Bouffanais, Y.; Bozzi, A.; Bradaschia, C.; Brady, P. R.; Braginsky, V. B.; Branchesi, M.; Brau, J. E.; Briant, T.; Brillet, A.; Brinkmann, M.; Brisson, V.; Brockill, P.; Broida, J. E.; Brooks, A. F.; Brown, D. A.; Brown, D. D.; Brown, N. M.; Brunett, S.; Buchanan, C. C.; Buikema, A.; Bulik, T.; Bulten, H. J.; Buonanno, A.; Buskulic, D.; Buy, C.; Byer, R. L.; Cabero, M.; Cadonati, L.; Cagnoli, G.; Cahillane, C.; Calderón Bustillo, J.; Callister, T.; Calloni, E.; Camp, J. B.; Cannon, K. C.; Cao, J.; Capano, C. D.; Capocasa, E.; Carbognani, F.; Caride, S.; Casanueva Diaz, C.; Casentini, J.; Caudill, S.; Cavaglià, M.; Cavalier, F.; Cavalieri, R.; Cella, G.; Cepeda, C. B.; Cerboni Baiardi, L.; Cerretani, G.; Cesarini, E.; Chamberlin, S. J.; Chan, M.; Chao, S.; Charlton, P.; Chassande-Mottin, E.; Cheeseboro, B. D.; Chen, H. Y.; Chen, Y.; Cheng, C.; Chincarini, A.; Chiummo, A.; Cho, H. S.; Cho, M.; Chow, J. H.; Christensen, N.; Chu, Q.; Chua, S.; Chung, S.; Ciani, G.; Clara, F.; Clark, J. A.; Cleva, F.; Coccia, E.; Cohadon, P.-F.; Colla, A.; Collette, C. G.; Cominsky, L.; Constancio, M.; Conte, A.; Conti, L.; Cook, D.; Corbitt, T. R.; Cornish, N.; Corsi, A.; Cortese, S.; Costa, C. A.; Coughlin, M. W.; Coughlin, S. B.; Coulon, J.-P.; Countryman, S. T.; Couvares, P.; Cowan, E. E.; Coward, D. M.; Cowart, M. J.; Coyne, D. C.; Coyne, R.; Craig, K.; Creighton, J. D. E.; Cripe, J.; Crowder, S. G.; Cumming, A.; Cunningham, L.; Cuoco, E.; Dal Canton, T.; Danilishin, S. L.; D'Antonio, S.; Danzmann, K.; Darman, N. S.; Dasgupta, A.; Da Silva Costa, C. F.; Dattilo, V.; Dave, I.; Davier, M.; Davies, G. S.; Daw, E. J.; Day, R.; De, S.; DeBra, D.; Debreczeni, G.; Degallaix, J.; De Laurentis, M.; Deléglise, S.; Del Pozzo, W.; Denker, T.; Dent, T.; Dergachev, V.; De Rosa, R.; DeRosa, R. T.; DeSalvo, R.; Devine, R. C.; Dhurandhar, S.; Díaz, M. C.; Di Fiore, L.; Di Giovanni, M.; Di Girolamo, T.; Di Lieto, A.; Di Pace, S.; Di Palma, I.; Di Virgilio, A.; Dolique, V.; Donovan, F.; Dooley, K. L.; Doravari, S.; Douglas, R.; Downes, T. P.; Drago, M.; Drever, R. W. P.; Driggers, J. C.; Ducrot, M.; Dwyer, S. E.; Edo, T. B.; Edwards, M. C.; Effler, A.; Eggenstein, H.-B.; Ehrens, P.; Eichholz, J.; Eikenberry, S. S.; Engels, W.; Essick, R. C.; Etienne, Z.; Etzel, T.; Evans, M.; Evans, T. M.; Everett, R.; Factourovich, M.; Fafone, V.; Fair, H.; Fairhurst, S.; Fan, X.; Fang, Q.; Farinon, S.; Farr, B.; Farr, W. M.; Fauchon-Jones, E.; Favata, M.; Fays, M.; Fehrmann, H.; Fejer, M. M.; Fenyvesi, E.; Ferrante, I.; Ferreira, E. C.; Ferrini, F.; Fidecaro, F.; Fiori, I.; Fiorucci, D.; Fisher, R. P.; Flaminio, R.; Fletcher, M.; Fournier, J.-D.; Frasca, S.; Frasconi, F.; Frei, Z.; Freise, A.; Frey, R.; Frey, V.; Fritschel, P.; Frolov, V. V.; Fulda, P.; Fyffe, M.; Gabbard, H. A. G.; Gaebel, S.; Gair, J. R.; Gammaitoni, L.; Gaonkar, S. G.; Garufi, F.; Gaur, G.; Gehrels, N.; Gemme, G.; Geng, P.; Genin, E.; Gennai, A.; George, J.; Gergely, L.; Germain, V.; Ghosh, Abhirup; Ghosh, Archisman; Ghosh, S.; Giaime, J. A.; Giardina, K. D.; Giazotto, A.; Gill, K.; Glaefke, A.; Goetz, E.; Goetz, R.; Gondan, L.; González, G.; Gonzalez Castro, J. M.; Gopakumar, A.; Gordon, N. A.; Gorodetsky, M. L.; Gossan, S. E.; Gosselin, M.; Gouaty, R.; Grado, A.; Graef, C.; Graff, P. B.; Granata, M.; Grant, A.; Gras, S.; Gray, C.; Greco, G.; Green, A. C.; Groot, P.; Grote, H.; Grunewald, S.; Guidi, G. M.; Guo, X.; Gupta, A.; Gupta, M. K.; Gushwa, K. E.; Gustafson, E. K.; Gustafson, R.; Hacker, J. J.

    2016-10-01

    This paper presents updated estimates of source parameters for GW150914, a binary black-hole coalescence event detected by the Laser Interferometer Gravitational-wave Observatory (LIGO) in 2015 [Abbott et al. Phys. Rev. Lett. 116, 061102 (2016).]. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] presented parameter estimation of the source using a 13-dimensional, phenomenological precessing-spin model (precessing IMRPhenom) and an 11-dimensional nonprecessing effective-one-body (EOB) model calibrated to numerical-relativity simulations, which forces spin alignment (nonprecessing EOBNR). Here, we present new results that include a 15-dimensional precessing-spin waveform model (precessing EOBNR) developed within the EOB formalism. We find good agreement with the parameters estimated previously [Abbott et al. Phys. Rev. Lett. 116, 241102 (2016).], and we quote updated component masses of 35-3+5 M⊙ and 3 0-4+3 M⊙ (where errors correspond to 90% symmetric credible intervals). We also present slightly tighter constraints on the dimensionless spin magnitudes of the two black holes, with a primary spin estimate <0.65 and a secondary spin estimate <0.75 at 90% probability. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] estimated the systematic parameter-extraction errors due to waveform-model uncertainty by combining the posterior probability densities of precessing IMRPhenom and nonprecessing EOBNR. Here, we find that the two precessing-spin models are in closer agreement, suggesting that these systematic errors are smaller than previously quoted.

  5. Bridging Faith, Languages and Learning in London: A Faith Teacher Reflects upon Pedagogy in Religious Instruction Classes

    Science.gov (United States)

    Lytra, Vally; Gregory, Eve; Ilankuberan, Arani

    2016-01-01

    In this article, we examine a faith teacher's reflections on faith literacy teaching and learning and how they shaped his pedagogy in the context of Hindu/Saiva religious instruction classes for students of Sri Lankan Tamil heritage. The data are part of a larger multi-site three-year team ethnography of children's faith literacy learning in…

  6. Kierkegaard on the Relationship of Faith and Rationality

    Directory of Open Access Journals (Sweden)

    Shima

    2015-10-01

    Full Text Available øren Kierkegaard was one of the most influential Christian philosophers and theologians in the nineteenth century. The relationship between faith and rationality in Kierkegaard’s thought is a very important topic for many contemporary theologians and philosophers. He, with a particular interpretation of faith, tried to show that faith is a passion and subjective truth, conflicting with objective categories and intellectual arguments. On the one hand, he attempted to prove that faith is beyond reason and in conflict with it, on the other hand. Using three arguments; the approximation argument, the postponement argument, and the passion argument, he asserts these two claims. This article seeks to answer two central questions about the relationship of faith and rationality in Kierkegaard's thought: First, on what basis Kierkegaard proves that faith is beyond reason and in conflict with it? Second, is Kierkegaard's view on the matter of faith and reason justified and acceptable?

  7. (THE LEGAL CONCEPT OF) BAD FAITH

    OpenAIRE

    Alferillo, Pascual E.; Academia Nacional de Derecho de Córdoba.

    2011-01-01

    In the present investigation examines bad faith trying to decipher if it has enough conceptual and operational independence for typical autonomous legal figure. In this course and, based on the collection of the normative background in Latin American and European civil codes which is mentioned in seeks to establish the common  parameters that guide the construction of its concept. From this, analyses the differences and links with the criminal intent and guilt, to conclude that the figure has...

  8. Fractal characteristics for binary noise radar waveform

    Science.gov (United States)

    Li, Bing C.

    2016-05-01

    Noise radars have many advantages over conventional radars and receive great attentions recently. The performance of a noise radar is determined by its waveforms. Investigating characteristics of noise radar waveforms has significant value for evaluating noise radar performance. In this paper, we use binomial distribution theory to analyze general characteristics of binary phase coded (BPC) noise waveforms. Focusing on aperiodic autocorrelation function, we demonstrate that the probability distributions of sidelobes for a BPC noise waveform depend on the distances of these sidelobes to the mainlobe. The closer a sidelobe to the mainlobe, the higher the probability for this sidelobe to be a maximum sidelobe. We also develop Monte Carlo framework to explore the characteristics that are difficult to investigate analytically. Through Monte Carlo experiments, we reveal the Fractal relationship between the code length and the maximum sidelobe value for BPC waveforms, and propose using fractal dimension to measure noise waveform performance.

  9. Visualization and analysis of lidar waveform data

    Science.gov (United States)

    Olsen, Richard C.; Metcalf, Jeremy P.

    2017-05-01

    LiDAR waveform analysis is a relatively new activity in the area of laser scanning. The work described here is an exploration of a different approach to visualization and analysis, following the structure that has evolved for the analysis of imaging spectroscopy data (hyperspectral imaging). The waveform data are transformed into 3-dimensional data structures that provide xy position information, and a z-coordinate, which is the digitized waveform. This allows for representation of the data in spatial and waveform space, the extraction of characteristic spectra, and the development of regions of interest. This representation allows for the application of standard spectral classification tools such as the maximum likelihood classifier.

  10. Seismic waveform modeling over cloud

    Science.gov (United States)

    Luo, Cong; Friederich, Wolfgang

    2016-04-01

    With the fast growing computational technologies, numerical simulation of seismic wave propagation achieved huge successes. Obtaining the synthetic waveforms through numerical simulation receives an increasing amount of attention from seismologists. However, computational seismology is a data-intensive research field, and the numerical packages usually come with a steep learning curve. Users are expected to master considerable amount of computer knowledge and data processing skills. Training users to use the numerical packages, correctly access and utilize the computational resources is a troubled task. In addition to that, accessing to HPC is also a common difficulty for many users. To solve these problems, a cloud based solution dedicated on shallow seismic waveform modeling has been developed with the state-of-the-art web technologies. It is a web platform integrating both software and hardware with multilayer architecture: a well designed SQL database serves as the data layer, HPC and dedicated pipeline for it is the business layer. Through this platform, users will no longer need to compile and manipulate various packages on the local machine within local network to perform a simulation. By providing users professional access to the computational code through its interfaces and delivering our computational resources to the users over cloud, users can customize the simulation at expert-level, submit and run the job through it.

  11. Faith and Health: Past and Present of Relations between Faith Communities and the World Health Organization

    Directory of Open Access Journals (Sweden)

    The Rev. Canon Ted Karpf

    2014-01-01

    Full Text Available Relationships between faith communities and international multi-lateral organizations can be complicated. While there is potential for synergy between the two, different values often characterize the approach of each. The history of these relationships is illustrative. This review describes collaboration between the World Health Organization (WHO and faith-based organizations (FBOs in the implementation of primary health care, the role of spirituality in health, community responses to the HIV pandemic, and definitions of Quality of Life containing spiritual dimensions. However, important gaps persist in the appreciation and measurement of the contribution of faith communities to health assets on the part of governments and the WHO. FBOs can still draw from the nine points developed in the 1960s as a time-tested viable agenda for current and future operations.

  12. Goldstone Solar System Radar Waveform Generator

    Science.gov (United States)

    Quirk, Kevin J.; Patawaran, Ferze D.; Nguyen, Danh H.; Nguyen, Huy

    2012-01-01

    Due to distances and relative motions among the transmitter, target object, and receiver, the time-base between any transmitted and received signal will undergo distortion. Pre-distortion of the transmitted signal to compensate for this time-base distortion allows reception of an undistorted signal. In most radar applications, an arbitrary waveform generator (AWG) would be used to store the pre-calculated waveform and then play back this waveform during transmission. The Goldstone Solar System Radar (GSSR), however, has transmission durations that exceed the available memory storage of such a device. A waveform generator capable of real-time pre-distortion of a radar waveform to a given time-base distortion function is needed. To pre-distort the transmitted signal, both the baseband radar waveform and the RF carrier must be modified. In the GSSR, this occurs at the up-conversion mixing stage to an intermediate frequency (IF). A programmable oscillator (PO) is used to generate the IF along with a time-varying phase component that matches the time-base distortion of the RF carrier. This serves as the IF input to the waveform generator where it is mixed with a baseband radar waveform whose time-base has been distorted to match the given time-base distortion function producing the modulated IF output. An error control feedback loop is used to precisely control the time-base distortion of the baseband waveform, allowing its real-time generation. The waveform generator produces IF modulated radar waveforms whose time-base has been pre-distorted to match a given arbitrary function. The following waveforms are supported: continuous wave (CW), frequency hopped (FH), binary phase code (BPC), and linear frequency modulation (LFM). The waveform generator takes as input an IF with a time varying phase component that matches the time-base distortion of the carrier. The waveform generator supports interconnection with deep-space network (DSN) timing and frequency standards, and

  13. Optical arbitrary waveform characterization using linear spectrograms.

    Science.gov (United States)

    Jiang, Zhi; Leaird, Daniel E; Long, Christopher M; Boppart, Stephen A; Weiner, Andrew M

    2010-08-01

    We demonstrate the first application of linear spectrogram methods based on electro-optic phase modulation to characterize optical arbitrary waveforms generated under spectral line-by-line control. This approach offers both superior sensitivity and self-referencing capability for retrieval of periodic high repetition rate optical arbitrary waveforms.

  14. Digital Waveform Generator Basedon FPGA

    Directory of Open Access Journals (Sweden)

    Shoucheng Ding

    2012-07-01

    Full Text Available Field Programmable Gate Array (FPGA of the Cyclone II series was as the core processor of frequency meter and the Quartus II was as the development plat form. This article had designed the fully digital signal generator. It use dall-digital frequency synthesizer technology and FPGA programming implemented the three waveforms: sin wave and square wave and triangle wave. The frequency was adjustable through10- bit phase accumulator and the analog multiplier achieved amplitude modulation. Using 51soft nuclear FPGA wrote a C program and realized the in put control word. The 4 × 4 matrix keyboard inputted frequency or amplitude value and the LCD1602displayedthem. The test results show that the system has high precision, distortion and low.

  15. Faith-Based International Development Work: A Review

    OpenAIRE

    Dan Heist; Cnaan, Ram A

    2016-01-01

    In the wake of the Faith-Based Initiative in the USA, substantial research has resulted in an increased awareness of religious congregations and faith-based organizations as welfare service providers. The next frontier appears to be the role of religious organizations in international social and economic development, a topic that only recently started to attract academic interest. In this paper, we review available literature on the role that religious, or faith-based, organizations play in i...

  16. Averaging methods for extracting representative waveforms from motor unit action potential trains.

    Science.gov (United States)

    Malanda, Armando; Navallas, Javier; Rodriguez-Falces, Javier; Rodriguez-Carreño, Ignacio; Gila, Luis

    2015-08-01

    In the context of quantitative electromyography (EMG), it is of major interest to obtain a waveform that faithfully represents the set of potentials that constitute a motor unit action potential (MUAP) train. From this waveform, various parameters can be determined in order to characterize the MUAP for diagnostic analysis. The aim of this work was to conduct a thorough, in-depth review, evaluation and comparison of state-of-the-art methods for composing waveforms representative of MUAP trains. We evaluated nine averaging methods: Ensemble (EA), Median (MA), Weighted (WA), Five-closest (FCA), MultiMUP (MMA), Split-sweep median (SSMA), Sorted (SA), Trimmed (TA) and Robust (RA) in terms of three general-purpose signal processing figures of merit (SPMF) and seven clinically-used MUAP waveform parameters (MWP). The convergence rate of the methods was assessed as the number of potentials per MUAP train (NPM) required to reach a level of performance that was not significantly improved by increasing this number. Test material comprised 78 MUAP trains obtained from the tibialis anterioris of seven healthy subjects. Error measurements related to all SPMF and MWP parameters except MUAP amplitude descended asymptotically with increasing NPM for all methods. MUAP amplitude showed a consistent bias (around 4% for EA and SA and 1-2% for the rest). MA, TA and SSMA had the lowest SPMF and MWP error figures. Therefore, these methods most accurately preserve and represent MUAP physiological information of utility in clinical medical practice. The other methods, particularly WA, performed noticeably worse. Convergence rate was similar for all methods, with NPM values averaged among the nine methods, which ranged from 10 to 40, depending on the waveform parameter evaluated.

  17. Balancing acts: drag queens, gender and faith.

    Science.gov (United States)

    Sullivan-Blum, Constance R

    2004-01-01

    While engaged in research on the same-sex marriage debate in mainline denominations, I interviewed 23 LGBT Christians, four of whom were drag queens. While it is not possible to generalize from such a small sample, the drag queens in this study insist on maintaining their identity as Christians despite the hegemonic discourse that renders faith and LGBT identities mutually exclusive. They developed innovative approaches to reconciling their gender and sexual identities with their spirituality. Their innovations are potentially liberating not just for them personally, but for LGBT people generally because they challenge Christianity's rigid dichotomies of gender and sexuality.

  18. Mechanics of Old Faithful Geyser, Calistoga, CA

    Science.gov (United States)

    Rudolph, M.L.; Manga, M.; Hurwitz, Shaul; Johnston, Malcolm J.; Karlstrom, L.; Wang, Chun-Yong

    2012-01-01

    In order to probe the subsurface dynamics associated with geyser eruptions, we measured ground deformation at Old Faithful Geyser of Calistoga, CA. We present a physical model in which recharge during the period preceding an eruption is driven by pressure differences relative to the aquifer supplying the geyser. The model predicts that pressure and ground deformation are characterized by an exponential function of time, consistent with our observations. The geyser's conduit is connected to a reservoir at a depth of at least 42 m, and pressure changes in the reservoir can produce the observed ground deformations through either a poroelastic or elastic mechanical model.

  19. Issues of hope and faith in the cancer patient.

    Science.gov (United States)

    Carni, E

    1988-12-01

    Akira Kurosawa's 1952 film about a man with a terminal gastric cancer introduces a discussion of hope and faith in the oncology patient. A psychodynamic relationship between hope and faith is explored, using Lawrence LeShan's research in cancer psychotherapy and Erik Erikson's lifespan developmental theory. LeShan describes a cancer personality characterized by hopeless despair, while Erikson formulates a psychogenetic framework for the development of hope and despair. Hope and faith are linked through the individual's earliest strivings toward basic trust in the world and his or her own self-efficacy. Accordingly, cancer psychotherapy may aim at restoring adult patients' faith in life and inner creative resources.

  20. Implementation of Pulse Radar Waveform Based on Software Radio Platform

    OpenAIRE

    Wang Dong; Dong Jian; Xiao Shunping

    2015-01-01

    Based on the frequency and phase modulated signal, the authors design some commonly-used pulse radar baseband waveform, such as linear frequency modulated waveform, nonlinear frequency modulated waveform, Costas waveform, Barker coding waveform and multi-phase coded waveform, and the authors compare their performance, such as the peak side lobe ratio, the Rayleigh resolution in time and distance resolution. Then, based on the software radio platform NI PXIe-5644R, the authors design the timin...

  1. Improved retracking algorithm for oceanic altimeter waveforms

    Institute of Scientific and Technical Information of China (English)

    Lifeng Bao; Yang Lu; Yong Wang

    2009-01-01

    Over the deep oceans without land/ice interference, the waveforms created by the return altimeter pulse generally follow the ocean model of Brown, and the corresponding range can be properly determined using the result from an onboard tracker. In the case of com-plex altimeter waveforms corrupted due to a variety of reasons, the processor on the satellite cannot properly determine the center of the leading edge, and range observations can be in error. As an efficacious method to improve the precision of those altimeter observations with complex waveforms, waveform retracking is required to reprocess the original returning pulse. Based on basic altimeter theory and the geometric feature of altimeter waveforms, we developed a new altimeter waveform retracker, which is valid for all altimeter wave-forms once there exists a reasonable returning signal. The performances of the existing Beta-5 retracker, threshold retracker, improved threshold retracker, and the new retracker are assessed in the experimental regions (China Seas and its adjacent regions), and the improvements in the accuracy of sea surface height are investigated by the difference between retracked altimeter observations and ref-erenced geoid. The comparisons denote that the new algorithm gives the best performance in both the open ocean and coastal regions. Also, the new retracker presents a uniform performance in the whole test region. Besides, there is a significant improvement in the short-wavelength precision and the spatial resolution of sea surface height after retracking process.

  2. Waveform Fingerprinting for Efficient Seismic Signal Detection

    Science.gov (United States)

    Yoon, C. E.; OReilly, O. J.; Beroza, G. C.

    2013-12-01

    Cross-correlating an earthquake waveform template with continuous waveform data has proven a powerful approach for detecting events missing from earthquake catalogs. If templates do not exist, it is possible to divide the waveform data into short overlapping time windows, then identify window pairs with similar waveforms. Applying these approaches to earthquake monitoring in seismic networks has tremendous potential to improve the completeness of earthquake catalogs, but because effort scales quadratically with time, it rapidly becomes computationally infeasible. We develop a fingerprinting technique to identify similar waveforms, using only a few compact features of the original data. The concept is similar to human fingerprints, which utilize key diagnostic features to identify people uniquely. Analogous audio-fingerprinting approaches have accurately and efficiently found similar audio clips within large databases; example applications include identifying songs and finding copyrighted content within YouTube videos. In order to fingerprint waveforms, we compute a spectrogram of the time series, and segment it into multiple overlapping windows (spectral images). For each spectral image, we apply a wavelet transform, and retain only the sign of the maximum magnitude wavelet coefficients. This procedure retains just the large-scale structure of the data, providing both robustness to noise and significant dimensionality reduction. Each fingerprint is a high-dimensional, sparse, binary data object that can be stored in a database without significant storage costs. Similar fingerprints within the database are efficiently searched using locality-sensitive hashing. We test this technique on waveform data from the Northern California Seismic Network that contains events not detected in the catalog. We show that this algorithm successfully identifies similar waveforms and detects uncataloged low magnitude events in addition to cataloged events, while running to completion

  3. Parallel Algorithm in Surface Wave Waveform Inversion

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    In Surface wave waveform inversion, we want to reconstruct 3Dshear wav e velocity structure, which calculation beyond the capability of the powerful pr esent day personal computer or even workstation. So we designed a high parallele d algorithm and carried out the inversion on Parallel computer based on the part itioned waveform inversion (PWI). It partitions the large scale optimization pro blem into a number of independent small scale problems and reduces the computati onal effort by several orders of magnitude. We adopted surface waveform inversio n with a equal block(2°×2°) discretization.

  4. Periodic, pseudonoise waveforms for multifunction coherent ladar.

    Science.gov (United States)

    Dierking, Matthew P; Duncan, Bradley D

    2010-04-01

    We report the use of periodic, pseudonoise waveforms in a multifunction coherent ladar system. We exploit the Doppler sensitivity of these waveforms, as well as agile processing, to enable diverse ladar functions, including high range resolution imaging, macro-Doppler imaging, synthetic aperture ladar, and range-resolved micro-Doppler imaging. We present analytic expressions and simulations demonstrating the utility of pseudonoise waveforms for each of the ladar modes. We also discuss a laboratory pseudonoise ladar system that was developed to demonstrate range compression and range-resolved micro-Doppler imaging, as well as the phase recovery common to each of the coherent modes.

  5. Optimal pseudorandom pulse position modulation ladar waveforms.

    Science.gov (United States)

    Fluckiger, David U; Boland, Brian F; Marcus, Eran

    2015-03-20

    An algorithm for generating optimal pseudorandom pulse position modulation (PRPPM) waveforms for ladar ranging is presented. Bistatic ladar systems using Geiger-mode avalanche photodiodes require detection of several pulses in order to generate sufficient target statistics to satisfy some detection decision rule. For targets with large initial range uncertainty, it becomes convenient to transmit a pulse train with large ambiguity range. One solution is to employ a PRPPM waveform. An optimal PRPPM waveform will have minimal sidelobes: equivalent to 1 or 0 counts after the pulse correlation filter (compression). This can be accomplished by generating PRPPM pulse trains with optimal or minimal sidelobe autocorrelation.

  6. The Law and Hiring Practices in Faith-Based Schools

    Science.gov (United States)

    Russo, Charles J.

    2009-01-01

    A key concern of educational leaders in faith-based schools is their ability to hire faculty members who support institutional missions. Insofar as the American legal system protects the rights of leaders in faith-based schools to hire those who share in school goals, this article is divided into three substantive sections. The first section…

  7. Understanding Faith-Based Organizations and the Law

    Science.gov (United States)

    Wright, David J.; Montiel, Lisa M.

    2008-01-01

    The role of religious groups in providing a wide range of services, including child care and early childhood education, has drawn renewed attention since the federal government's 2001 Faith-Based and Community Initiative. This article explains the various forms that faith-based organizations can take, provides an overview of the services they…

  8. Aesthetic Learning Theory and the Faith Formation of Young Adults

    Science.gov (United States)

    Douglass, Katherine M.

    2013-01-01

    Participation in the arts is a form of practical reason and as such has the potential to form and transform the faith of individuals. The findings from Katherine M. Douglass's 2011 study on the role of the arts in the faith lives of young adults provides examples of the transformative potential of the arts as they foster expression,…

  9. Freeing Speech: Proverbial Wisdom and Faith Formation as Liberation

    Science.gov (United States)

    Willhauck, Susan

    2013-01-01

    It is crucial to recover the practice of seeking and refining ways to speak of faith. Certain sayings, idioms, maxims, and proverbs constituting wisdom from various cultures help shape a faith that is liberative, particularly evident in undervalued and dominated cultures. This article examines proverbial wisdom and the patois of the street to…

  10. Going Green and Renewing Life: Environmental Education in Faith Communities

    Science.gov (United States)

    Hitzhusen, Gregory E.

    2012-01-01

    Faith communities, such as churches, synagogues, temples, and mosques, are providing new venues for innovative adult environmental education. As faith communities turn their concerns to issues of sustainability, environmental teaching is emerging in many forms across diverse religious traditions, as evidenced by the development of denominational…

  11. Selection of Carrier Waveforms for PWM Inverter

    Institute of Scientific and Technical Information of China (English)

    陈国呈; 屈克庆; 许春雨; 孙承波

    2003-01-01

    In this paper the influence of different carrier waveforms upon the output characteristics of PWM inverter is described in detail. When a triangular carrier waveform is used in hard-switching PWM inverters, harmonics exist in the neighborhood of the output frequency of the inverter output voltage and current due to the dead time. The triangular carrier waveform used in soft-switching PWM inverter will cause difficulties in controlling resonance-trigger time, higher loss in the resonant circuit, and less utilization of the DC bus voltage. If a sawtooth carrier is used in hard-switching PWM inverter, there will be severe distortion in the current waveform. When sawtooth carriers with alternate positive and negative slopes are used in soft-switching PWM inverters, the resonancetrigger time is easy to control, and distortion in the output voltage and current caused by the dead time will not appear.

  12. The Dardenne Brothers and the Invisible Ethical Drama: Faith without Faith

    Directory of Open Access Journals (Sweden)

    John Caruana

    2016-04-01

    Full Text Available The cinema of the Dardenne brothers represents a new kind of cinema, one that challenges a number of our conventional ways of thinking about the distinction between religion and secularism, belief and unbelief. Their films explore the intricacies of spiritual and ethical transformations as they are experienced within embodied, material life. These features of their cinema will be examined primarily through the lens of Emmanuel Levinas’s philosophy of the imbrication of the drama of existence and the ethical intrigue of self and Other. The work of the Dardenne brothers can be understood as an attempt to express what I describe as a “faith without faith”—a recognition of the absolute centrality of belief for the development of a responsible subject but in the absence of a traditional faith in a personal deity.

  13. The Construction of Faith in Accounting

    DEFF Research Database (Denmark)

    Pontoppidan, Caroline Aggestam; Chow, Danny

    This paper has sought to explore how generic globalized accounting ideas and instruments come to be translated into a local solution at the United Nations (UN) in response to the oil-for-food scandal. To do so, we analysed the official, published, rationales for reform and considered the role...... of key protagonists within the reform process. A number of themes emerged from the analysis. We argue that the process of instilling faith in accounting at the UN relies heavily on the clever and varying use of an extrapolative logic derived from a master-idea of the need to ‘do more accounting......’ to persuade reformers to take on particular ideas and instruments of accounting. The work of propagating such logic was facilitated by a closed system of protagonists who form a tight interlocking network....

  14. Should Entanglement Measures be Monogamous or Faithful?

    CERN Document Server

    Lancien, Cécilia; Huber, Marcus; Piani, Marco; Adesso, Gerardo; Winter, Andreas

    2016-01-01

    "Is entanglement monogamous?" asks the title of a popular article [B. Terhal, IBM J. Res. Dev. 48, 71 (2004)], celebrating C. H. Bennett's legacy on quantum information theory. While the answer is certainly affirmative in the qualitative sense, the situation is far less clear if monogamy is intended as a quantitative limitation on the distribution of bipartite entanglement in a multipartite system, given some particular measure of entanglement. Here, we clarify the most general form of a universal quantitative monogamy relation for a bipartite measure of entanglement. We then go on to show that an important class of entanglement measures fail to be monogamous in this most general sense of the term, with monogamy violations becoming generic with increasing dimension. In particular, we show that entanglement measures cannot satisfy monogamy while at the same time faithfully capturing the entanglement of the fully antisymmetric state in arbitrary dimension. Nevertheless, monogamy can be recovered if one allows f...

  15. Uncertainty in quantum mechanics: faith or fantasy?

    Science.gov (United States)

    Penrose, Roger

    2011-12-13

    The word 'uncertainty', in the context of quantum mechanics, usually evokes an impression of an essential unknowability of what might actually be going on at the quantum level of activity, as is made explicit in Heisenberg's uncertainty principle, and in the fact that the theory normally provides only probabilities for the results of quantum measurement. These issues limit our ultimate understanding of the behaviour of things, if we take quantum mechanics to represent an absolute truth. But they do not cause us to put that very 'truth' into question. This article addresses the issue of quantum 'uncertainty' from a different perspective, raising the question of whether this term might be applied to the theory itself, despite its unrefuted huge success over an enormously diverse range of observed phenomena. There are, indeed, seeming internal contradictions in the theory that lead us to infer that a total faith in it at all levels of scale leads us to almost fantastical implications.

  16. The Faithfulness Principle of Literary Translation

    Institute of Scientific and Technical Information of China (English)

    郭俊霞

    2008-01-01

    In the recent decades, Whenever the question of principles of translation is under discussion, the three characters, faithfulness, expressiveness and elegance formulated by Yan Fu in his Introductory Remarks are thought of and supported as the one and only maxim all translators must absorb. But the three principles for translation, especially some of the methods related with them, seem to be not one hunderd percent applicable to the work of translation today. It is necessary make a re?evaluation of them. We should neither negate nor affirm them as a whole without any criticism or revision. The correct attitude towards them is to accept them critically and absorb what is still useful to us.

  17. Faith communities and their assets for health promotion: the views from health professionals and faith leaders in Dundee, in Scotland.

    Science.gov (United States)

    Fagan, Donna M; Kiger, Alice; van Teijlingen, Edwin

    2012-06-01

    Within the European Union, as well as in Canada and the United States (US), health promoters employ a number of strategies to encourage community-based health improvements. This involves the creation of innovative health promotion partnerships to support and enable people to choose and engage in healthy living practices. Compared to the US, in other Western countries, such as the United Kingdom, faith communities have largely been ignored in health promotion partnerships. This study established existing evidence about health promotion in faith communities in Scotland by examining the perceptions and attitudes concerning health promotion among faith leaders and health promotion professionals. We conducted 33 semi-structured interviews with health promotion professionals (n = 9) and representatives of Christian and non-Christian faith communities (n = 24). The majority of participants expressed an interest in the concept of health promotion in a faith community and could readily envision its application in their area of work. Both groups identified multiple physical assets, as well as social supports within faith communities that could be directed towards healthy living activities. Faith groups and church organisations may constitute potential partners and new settings to increase community capacity for health promotion. Further research and funding for demonstration projects may be particularly helpful to provide evidence of the strengths and limitations of faith-based health promotion in Scotland, which in turn could inform health promotion practice and policy.

  18. 18 CFR 2.20 - Good faith requests for transmission services and good faith responses by transmitting utilities.

    Science.gov (United States)

    2010-04-01

    ... 18 Conservation of Power and Water Resources 1 2010-04-01 2010-04-01 false Good faith requests for transmission services and good faith responses by transmitting utilities. 2.20 Section 2.20 Conservation of Power and Water Resources FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY GENERAL...

  19. High-Voltage, Asymmetric-Waveform Generator

    Science.gov (United States)

    Beegle, Luther W.; Duong, Tuan A.; Duong, Vu A.; Kanik, Isik

    2008-01-01

    The shapes of waveforms generated by commercially available analytical separation devices, such as some types of mass spectrometers and differential mobility spectrometers are, in general, inadequate and result in resolution degradation in output spectra. A waveform generator was designed that would be able to circumvent these shortcomings. It is capable of generating an asymmetric waveform, having a peak amplitude as large as 2 kV and frequency of several megahertz, which can be applied to a capacitive load. In the original intended application, the capacitive load would consist of the drift plates in a differential-mobility spectrometer. The main advantage to be gained by developing the proposed generator is that the shape of the waveform is made nearly optimum for various analytical devices requiring asymmetric-waveform such as differential-mobility spectrometers. In addition, this waveform generator could easily be adjusted to modify the waveform in accordance with changed operational requirements for differential-mobility spectrometers. The capacitive nature of the load is an important consideration in the design of the proposed waveform generator. For example, the design provision for shaping the output waveform is based partly on the principle that (1) the potential (V) on a capacitor is given by V=q/C, where C is the capacitance and q is the charge stored in the capacitor; and, hence (2) the rate of increase or decrease of the potential is similarly proportional to the charging or discharging current. The proposed waveform generator would comprise four functional blocks: a sine-wave generator, a buffer, a voltage shifter, and a high-voltage switch (see Figure 1). The sine-wave generator would include a pair of operational amplifiers in a feedback configuration, the parameters of which would be chosen to obtain a sinusoidal timing signal of the desired frequency. The buffer would introduce a slight delay (approximately equal to 20 ns) but would otherwise

  20. Karoo fracking and the Christian faith community

    Directory of Open Access Journals (Sweden)

    Gerrit van Tonder

    2014-10-01

    Full Text Available One of the challenges for Practical Theology in Africa is to engage with the continent’s concerns and challenges in such a way that the kingdom of God is realised in society and is seen to be relevant to these issues by people who are outside of academia. In our article, which was first presented at the Practical Theology congress in Pretoria in January 2014, the authors seek to demonstrate how this may be accomplished by applying insights to one concern, namely ‘fracking’. The objective is to mobilise the influential Christian faith community in South Africa to begin to exercise prophetic discernment concerning fracking in the Karoo. The fracking debate is a product of the tension between the environmental degradation that its waste products may cause, on the one hand, and, on the other, the greater energy demands of a rapidly increasing world population along with its expectations of an ever-increasing standard of living. Shale gas fracking in the Karoo region of South Africa promises to make vast reserves of oil and gas available to help meet a significant percentage of the country’s energy needs for many years to come, and so thus aid development and contribute to raising the standard of living of many people. Yet the management of the waste products associated with the process is an area of serious environmental concern. The article aims to apprise the South African Christian faith community of the technology and risks involved. Theological guidelines are presented by which fracking’s benefits and dangers can be interrogated so that the community may come to an informed decision as to whether or not to support fracking.

  1. Karoo fracking and the Christian faith community

    Directory of Open Access Journals (Sweden)

    Gerrit van Tonder

    2014-02-01

    Full Text Available One of the challenges for Practical Theology in Africa is to engage with the continent’s concerns and challenges in such a way that the kingdom of God is realised in society and is seen to be relevant to these issues by people who are outside of academia. In our article, which was first presented at the Practical Theology congress in Pretoria in January 2014, the authors seek to demonstrate how this may be accomplished by applying insights to one concern, namely ‘fracking’. The objective is to mobilise the influential Christian faith community in South Africa to begin to exercise prophetic discernment concerning fracking in the Karoo. The fracking debate is a product of the tension between the environmental degradation that its waste products may cause, on the one hand, and, on the other, the greater energy demands of a rapidly increasing world population along with its expectations of an ever-increasing standard of living. Shale gas fracking in the Karoo region of South Africa promises to make vast reserves of oil and gas available to help meet a significant percentage of the country’s energy needs for many years to come, and so thus aid development and contribute to raising the standard of living of many people. Yet the management of the waste products associated with the process is an area of serious environmental concern. The article aims to apprise the South African Christian faith community of the technology and risks involved. Theological guidelines are presented by which fracking’s benefits and dangers can be interrogated so that the community may come to an informed decision as to whether or not to support fracking.

  2. GRC GSFC TDRSS Waveform Metrics Report

    Science.gov (United States)

    Mortensen, Dale J.

    2013-01-01

    The report presents software metrics and porting metrics for the GGT Waveform. The porting was from a ground-based COTS SDR, the SDR-3000, to the CoNNeCT JPL SDR. The report does not address any of the Operating Environment (OE) software development, nor the original TDRSS waveform development at GSFC for the COTS SDR. With regard to STRS, the report presents compliance data and lessons learned.

  3. Accuracy and effectualness of closed-form, frequency-domain waveforms for non-spinning black hole binaries

    CERN Document Server

    Damour, T; Nagar, A

    2010-01-01

    The coalescences of binary black hole (BBH) systems, here taken to be non-spinning, are among the most promising sources for gravitational wave (GW) ground-based detectors, such as LIGO and Virgo. To detect the GW signals emitted by BBHs, and measure the parameters of the source, one needs to have in hand a bank of GW templates that are both effectual (for detection), and accurate (for measurement). We study the effectualness and the accuracy of the two types of parametrized banks of templates that are directly defined in the frequency-domain by means of closed-form expressions, namely 'post-Newtonian' (PN) and 'phenomenological' models. In absence of knowledge of the exact waveforms, our study assumes as fiducial, target waveforms the ones generated by the most accurate version of the effective one body (EOB) formalism. We find that, for initial GW detectors the use, at each point of parameter space, of the best closed-form template (among PN and phenomenological models) leads to an effectualness >97% over t...

  4. Improved Analysis of GW150914 Using a Fully Spin-Precessing Waveform Model

    Directory of Open Access Journals (Sweden)

    2016-10-01

    Full Text Available This paper presents updated estimates of source parameters for GW150914, a binary black-hole coalescence event detected by the Laser Interferometer Gravitational-wave Observatory (LIGO in 2015 [Abbott et al. Phys. Rev. Lett. 116, 061102 (2016.]. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016.] presented parameter estimation of the source using a 13-dimensional, phenomenological precessing-spin model (precessing IMRPhenom and an 11-dimensional nonprecessing effective-one-body (EOB model calibrated to numerical-relativity simulations, which forces spin alignment (nonprecessing EOBNR. Here, we present new results that include a 15-dimensional precessing-spin waveform model (precessing EOBNR developed within the EOB formalism. We find good agreement with the parameters estimated previously [Abbott et al. Phys. Rev. Lett. 116, 241102 (2016.], and we quote updated component masses of 35_{-3}^{+5} M_{⊙} and 30_{-4}^{+3} M_{⊙} (where errors correspond to 90% symmetric credible intervals. We also present slightly tighter constraints on the dimensionless spin magnitudes of the two black holes, with a primary spin estimate <0.65 and a secondary spin estimate <0.75 at 90% probability. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016.] estimated the systematic parameter-extraction errors due to waveform-model uncertainty by combining the posterior probability densities of precessing IMRPhenom and nonprecessing EOBNR. Here, we find that the two precessing-spin models are in closer agreement, suggesting that these systematic errors are smaller than previously quoted.

  5. Georgia Tech Catalog of Gravitational Waveforms

    CERN Document Server

    Jani, Karan; Clark, James A; London, Lionel; Laguna, Pablo; Shoemaker, Deirdre

    2016-01-01

    This paper introduces a catalog of gravitational waveforms from the bank of simulations by the numerical relativity effort at Georgia Tech. Currently, the catalog consists of 452 distinct waveforms from more than 600 binary black hole simulations: 128 of the waveforms are from binaries with black hole spins aligned with the orbital angular momentum, and 324 are from precessing binary black hole systems. The waveforms from binaries with non-spinning black holes have mass-ratios $q = m_1/m_2 \\le 15$, and those with precessing, spinning black holes have $q \\le 8$. The waveforms expand a moderate number of orbits in the late inspiral, the burst during coalescence, and the ring-down of the final black hole. Examples of waveforms in the catalog matched against the widely used approximate models are presented. In addition, predictions of the mass and spin of the final black hole by phenomenological fits are tested against the results from the simulation bank. The role of the catalog in interpreting the GW150914 even...

  6. Georgia tech catalog of gravitational waveforms

    Science.gov (United States)

    Jani, Karan; Healy, James; Clark, James A.; London, Lionel; Laguna, Pablo; Shoemaker, Deirdre

    2016-10-01

    This paper introduces a catalog of gravitational waveforms from the bank of simulations by the numerical relativity effort at Georgia Tech. Currently, the catalog consists of 452 distinct waveforms from more than 600 binary black hole simulations: 128 of the waveforms are from binaries with black hole spins aligned with the orbital angular momentum, and 324 are from precessing binary black hole systems. The waveforms from binaries with non-spinning black holes have mass-ratios q = m 1/m 2 ≤ 15, and those with precessing, spinning black holes have q ≤ 8. The waveforms expand a moderate number of orbits in the late inspiral, the burst during coalescence, and the ring-down of the final black hole. Examples of waveforms in the catalog matched against the widely used approximate models are presented. In addition, predictions of the mass and spin of the final black hole by phenomenological fits are tested against the results from the simulation bank. The role of the catalog in interpreting the GW150914 event and future massive binary black-hole search in LIGO is discussed. The Georgia Tech catalog is publicly available at einstein.gatech.edu/catalog.

  7. Optimizing spinning time-domain gravitational waveforms for Advanced LIGO data analysis

    CERN Document Server

    Devine, Caleb; McWilliams, Sean T

    2016-01-01

    The Spinning Effective One Body-Numerical Relativity (SEOBNR) series of gravitational wave approximants are among the best available for Advanced LIGO data analysis. Unfortunately, SEOBNR codes as they currently exist within LALSuite are generally too slow to be directly useful for standard Markov-Chain Monte Carlo-based parameter estimation (PE). Reduced-Order Models (ROMs) of SEOBNR have been developed for this purpose, but there is no known way to make ROMs of the full eight-dimensional intrinsic parameter space more efficient for PE than the SEOBNR codes directly. So as a proof of principle, we have sped up the original LALSuite SEOBNRv2 approximant code, which models waveforms from aligned-spin systems, by about 280x. Our optimized code shortens the timescale for conducting PE with this approximant to months, assuming a purely serial analysis, so that even modest parallelization combined with our optimized code will make running the full PE pipeline with SEOBNR codes directly a realistic possibility. A n...

  8. Optimizing spinning time-domain gravitational waveforms for advanced LIGO data analysis

    Science.gov (United States)

    Devine, Caleb; Etienne, Zachariah B.; McWilliams, Sean T.

    2016-06-01

    The spinning effective-one-body-numerical relativity (SEOBNR) series of gravitational wave approximants are among the best available for advanced LIGO data analysis. Unfortunately, SEOBNR codes as they currently exist within LALSuite are generally too slow to be directly useful for standard Markov-chain Monte Carlo-based parameter estimation (PE). Reduced-order models (ROMs) of SEOBNR have been developed for this purpose, but there is no known way to make ROMs of the full eight-dimensional intrinsic parameter space more efficient for PE than the SEOBNR codes directly. So as a proof of principle, we have sped up the original LALSuite SEOBNRv2 approximant code, which models waveforms from aligned-spin systems, by nearly 300x. Our optimized code shortens the timescale for conducting PE with this approximant to months, assuming a purely serial analysis, so that even modest parallelization combined with our optimized code will make running the full PE pipeline with SEOBNR codes directly a realistic possibility. A number of our SEOBNRv2 optimizations have already been applied to SEOBNRv3, a new approximant capable of modeling sources with all eight (precessing) intrinsic degrees of freedom. We anticipate that once all of our optimizations have been applied to SEOBNRv3, a similar speed-up may be achieved.

  9. Perception of stochastically undersampled sound waveforms: A model of auditory deafferentation

    Directory of Open Access Journals (Sweden)

    Enrique A Lopez-Poveda

    2013-07-01

    Full Text Available Auditory deafferentation, or permanent loss of auditory nerve afferent terminals, occurs after noise overexposure and aging and may accompany many forms of hearing loss. It could cause significant auditory impairment but is undetected by regular clinical tests and so its effects on perception are poorly understood. Here, we hypothesize and test a neural mechanism by which deafferentation could deteriorate perception. The basic idea is that the spike train produced by each auditory afferent resembles a stochastically digitized version of the sound waveform and that the quality of the waveform representation in the whole nerve depends on the number of aggregated spike trains or auditory afferents. We reason that because spikes occur stochastically in time with a higher probability for high- than for low-intensity sounds, more afferents would be required for the nerve to faithfully encode high-frequency or low-intensity waveform features than low-frequency or high-intensity features. Deafferentation would thus degrade the encoding of these features. We further reason that due to the stochastic nature of nerve firing, the degradation would be greater in noise than in quiet. This hypothesis is tested using a vocoder. Sounds were filtered through ten adjacent frequency bands. For the signal in each band, multiple stochastically subsampled copies were obtained to roughly mimic different stochastic representations of that signal conveyed by different auditory afferents innervating a given cochlear region. These copies were then aggregated to obtain an acoustic stimulus. Tone detection and speech identification tests were performed by young, normal-hearing listeners using different numbers of stochastic samplers per frequency band in the vocoder. Results support the hypothesis that stochastic undersampling of the sound waveform, inspired by deafferentation, impairs speech perception in noise more than in quiet, consistent with auditory aging effects.

  10. Platform for Postprocessing Waveform-Based NDE

    Science.gov (United States)

    Roth, Don

    2008-01-01

    Taking advantage of the similarities that exist among all waveform-based non-destructive evaluation (NDE) methods, a common software platform has been developed containing multiple- signal and image-processing techniques for waveforms and images. The NASA NDE Signal and Image Processing software has been developed using the latest versions of LabVIEW, and its associated Advanced Signal Processing and Vision Toolkits. The software is useable on a PC with Windows XP and Windows Vista. The software has been designed with a commercial grade interface in which two main windows, Waveform Window and Image Window, are displayed if the user chooses a waveform file to display. Within these two main windows, most actions are chosen through logically conceived run-time menus. The Waveform Window has plots for both the raw time-domain waves and their frequency- domain transformations (fast Fourier transform and power spectral density). The Image Window shows the C-scan image formed from information of the time-domain waveform (such as peak amplitude) or its frequency-domain transformation at each scan location. The user also has the ability to open an image, or series of images, or a simple set of X-Y paired data set in text format. Each of the Waveform and Image Windows contains menus from which to perform many user actions. An option exists to use raw waves obtained directly from scan, or waves after deconvolution if system wave response is provided. Two types of deconvolution, time-based subtraction or inverse-filter, can be performed to arrive at a deconvolved wave set. Additionally, the menu on the Waveform Window allows preprocessing of waveforms prior to image formation, scaling and display of waveforms, formation of different types of images (including non-standard types such as velocity), gating of portions of waves prior to image formation, and several other miscellaneous and specialized operations. The menu available on the Image Window allows many further image

  11. Keeping the faith: African American faith leaders' perspectives and recommendations for reducing racial disparities in HIV/AIDS infection.

    Directory of Open Access Journals (Sweden)

    Amy Nunn

    Full Text Available In Philadelphia, 66% of new HIV infections are among African Americans and 2% of African Americans are living with HIV. The city of Philadelphia has among the largest numbers of faith institutions of any city in the country. Although faith-based institutions play an important role in the African American community, their response to the AIDS epidemic has historically been lacking. We convened 38 of Philadelphia's most influential African American faith leaders for in-depth interviews and focus groups examining the role of faith-based institutions in HIV prevention. Participants were asked to comment on barriers to engaging faith-based leaders in HIV prevention and were asked to provide normative recommendations for how African American faith institutions can enhance HIV/AIDS prevention and reduce racial disparities in HIV infection. Many faith leaders cited lack of knowledge about Philadelphia's racial disparities in HIV infection as a common reason for not previously engaging in HIV programs; others noted their congregations' existing HIV prevention and outreach programs and shared lessons learned. Barriers to engaging the faith community in HIV prevention included: concerns about tacitly endorsing extramarital sex by promoting condom use, lack of educational information appropriate for a faith-based audience, and fear of losing congregants and revenue as a result of discussing human sexuality and HIV/AIDS from the pulpit. However, many leaders expressed a moral imperative to respond to the AIDS epidemic, and believed clergy should play a greater role in HIV prevention. Many participants noted that controversy surrounding homosexuality has historically divided the faith community and prohibited an appropriate response to the epidemic; many expressed interest in balancing traditional theology with practical public health approaches to HIV prevention. Leaders suggested the faith community should: promote HIV testing, including during or after

  12. Experimental Feasibility Study of Estimation of the Normalized Central Blood Pressure Waveform from Radial Photoplethysmogram

    Directory of Open Access Journals (Sweden)

    Edmond Zahedi

    2015-01-01

    Full Text Available The feasibility of a novel system to reliably estimate the normalized central blood pressure (CBPN from the radial photoplethysmogram (PPG is investigated. Right-wrist radial blood pressure and left-wrist PPG were simultaneously recorded in five different days. An industry-standard applanation tonometer was employed for recording radial blood pressure. The CBP waveform was amplitude-normalized to determine CBPN. A total of fifteen second-order autoregressive models with exogenous input were investigated using system identification techniques. Among these 15 models, the model producing the lowest coefficient of variation (CV of the fitness during the five days was selected as the reference model. Results show that the proposed model is able to faithfully reproduce CBPN (mean fitness = 85.2% ± 2.5% from the radial PPG for all 15 segments during the five recording days. The low CV value of 3.35% suggests a stable model valid for different recording days.

  13. Design of pulse waveform for waveform division multiple access UWB wireless communication system.

    Science.gov (United States)

    Yin, Zhendong; Wang, Zhirui; Liu, Xiaohui; Wu, Zhilu

    2014-01-01

    A new multiple access scheme, Waveform Division Multiple Access (WDMA) based on the orthogonal wavelet function, is presented. After studying the correlation properties of different categories of single wavelet functions, the one with the best correlation property will be chosen as the foundation for combined waveform. In the communication system, each user is assigned to different combined orthogonal waveform. Demonstrated by simulation, combined waveform is more suitable than single wavelet function to be a communication medium in WDMA system. Due to the excellent orthogonality, the bit error rate (BER) of multiuser with combined waveforms is so close to that of single user in a synchronous system. That is to say, the multiple access interference (MAI) is almost eliminated. Furthermore, even in an asynchronous system without multiuser detection after matched filters, the result is still pretty ideal and satisfactory by using the third combination mode that will be mentioned in the study.

  14. WFCatalog: A catalogue for seismological waveform data

    Science.gov (United States)

    Trani, Luca; Koymans, Mathijs; Atkinson, Malcolm; Sleeman, Reinoud; Filgueira, Rosa

    2017-09-01

    This paper reports advances in seismic waveform description and discovery leading to a new seismological service and presents the key steps in its design, implementation and adoption. This service, named WFCatalog, which stands for waveform catalogue, accommodates features of seismological waveform data. Therefore, it meets the need for seismologists to be able to select waveform data based on seismic waveform features as well as sensor geolocations and temporal specifications. We describe the collaborative design methods and the technical solution showing the central role of seismic feature catalogues in framing the technical and operational delivery of the new service. Also, we provide an overview of the complex environment wherein this endeavour is scoped and the related challenges discussed. As multi-disciplinary, multi-organisational and global collaboration is necessary to address today's challenges, canonical representations can provide a focus for collaboration and conceptual tools for agreeing directions. Such collaborations can be fostered and formalised by rallying intellectual effort into the design of novel scientific catalogues and the services that support them. This work offers an example of the benefits generated by involving cross-disciplinary skills (e.g. data and domain expertise) from the early stages of design, and by sustaining the engagement with the target community throughout the delivery and deployment process.

  15. SCA Waveform Development for Space Telemetry

    Science.gov (United States)

    Mortensen, Dale J.; Kifle, Multi; Hall, C. Steve; Quinn, Todd M.

    2004-01-01

    The NASA Glenn Research Center is investigating and developing suitable reconfigurable radio architectures for future NASA missions. This effort is examining software-based open-architectures for space based transceivers, as well as common hardware platform architectures. The Joint Tactical Radio System's (JTRS) Software Communications Architecture (SCA) is a candidate for the software approach, but may need modifications or adaptations for use in space. An in-house SCA compliant waveform development focuses on increasing understanding of software defined radio architectures and more specifically the JTRS SCA. Space requirements put a premium on size, mass, and power. This waveform development effort is key to evaluating tradeoffs with the SCA for space applications. Existing NASA telemetry links, as well as Space Exploration Initiative scenarios, are the basis for defining the waveform requirements. Modeling and simulations are being developed to determine signal processing requirements associated with a waveform and a mission-specific computational burden. Implementation of the waveform on a laboratory software defined radio platform is proceeding in an iterative fashion. Parallel top-down and bottom-up design approaches are employed.

  16. Should Entanglement Measures be Monogamous or Faithful?

    Science.gov (United States)

    Lancien, Cécilia; Di Martino, Sara; Huber, Marcus; Piani, Marco; Adesso, Gerardo; Winter, Andreas

    2016-08-01

    "Is entanglement monogamous?" asks the title of a popular article [B. Terhal, IBM J. Res. Dev. 48, 71 (2004)], celebrating C. H. Bennett's legacy on quantum information theory. While the answer is affirmative in the qualitative sense, the situation is less clear if monogamy is intended as a quantitative limitation on the distribution of bipartite entanglement in a multipartite system, given some particular measure of entanglement. Here, we formalize what it takes for a bipartite measure of entanglement to obey a general quantitative monogamy relation on all quantum states. We then prove that an important class of entanglement measures fail to be monogamous in this general sense of the term, with monogamy violations becoming generic with increasing dimension. In particular, we show that every additive and suitably normalized entanglement measure cannot satisfy any nontrivial general monogamy relation while at the same time faithfully capturing the geometric entanglement structure of the fully antisymmetric state in arbitrary dimension. Nevertheless, monogamy of such entanglement measures can be recovered if one allows for dimension-dependent relations, as we show explicitly with relevant examples.

  17. Faith in Islam and Christianity and its impact on health

    Directory of Open Access Journals (Sweden)

    Mohammad Mahdi Ahmad farazi

    Full Text Available Of the most central elements of religions and most important issues in theology and the Contemporary study of religion is the category of faith and its greatest impact on various aspects of life. Faith, in Islamic and Christian theology, has common and also distinct aspects. The truth of Faith in Islamic thought was multidimensional and consists of a wide range of Confession of language, intellectual knowledge, heart affirmation and inner experience to the treatment involves external actions. In Christianity, it was faith in confirmation of the revealed proposition that led to a sense of transcendence and meta-proposition and created Interest mode in human And sometimes faith apply to the experience of presence and manifestation of God in life. The position of consensus and association between Islam and Christianity was consists of the doctrine of Belief in God and the prophecy and resurrection. This belief is based on the functionalist view affected on body and psyche (or soul health of the human. The impact of Faith on physical and mental health has been separately approved by the specialists. The impacts of faith and religious teachings on physical health have been investigated through psycho-neuro-physiological way that Faith and Religious teachings produce positive emotions in human. The emotions through autonomous nervous system strengthen the immune system and its optimal performance in a way that the messenger molecule called neuropeptide Y, carry the messages related to thoughts and transport it through the blood circulation, and the mental state directly relate to the body's cells. This is the most important factor in strengthening or weakening the immune system influenced by the thoughts and beliefs. Moreover, Te'osumatic medicine known as the God-body medicine, after the psychosomatic or psycho-body medicine confirms the impact of faith on the health and recovery of individuals. They believe that illness and death of individuals

  18. Evolution, knowledge and Christian faith: Gerd Theissen and the ...

    African Journals Online (AJOL)

    Abstract. Evolution, knowledge and Christian faith: Gerd Theissen and the cred ibility of theology. In this article the way in which Theissen uses the evolutionary paradigm ..... theological thought it can be its originality and creative construction.

  19. Faith in Islam and Christianity and its impact on health

    Directory of Open Access Journals (Sweden)

    Ali Reza Ajdar

    2013-09-01

    Full Text Available Of the most central elements of religions and most important issues in theology and the Contemporary study of religion is the category of faith and its greatest impact on various aspects of life. Faith, in Islamic and Christian theology, has common and also distinct aspects. The truth of Faith in Islamic thought was multidimensional and consists of a wide range of Confession of language, intellectual knowledge, heart affirmation and inner experience to the treatment involves external actions. In Christianity, it was faith in confirmation of the revealed proposition that led to a sense of transcendence and meta-proposition and created Interest mode in human And sometimes faith apply to the experience of presence and manifestation of God in life.   The position of consensus and association between Islam and Christianity was consists of the doctrine of Belief in God and the prophecy and resurrection. This belief is based on the functionalist view affected on body and psyche (or soul health of the human. The impact of Faith on physical and mental health has been separately approved by the specialists. The impacts of faith and religious teachings on physical health have been investigated through psycho-neuro-physiological way that Faith and Religious teachings produce positive emotions in human. The emotions through autonomous nervous system strengthen the immune system and its optimal performance in a way that the messenger molecule called neuropeptide Y, carry the messages related to thoughts and transport it through the blood circulation, and the mental state directly relate to the body's cells. This is the most important factor in strengthening or weakening the immune system influenced by the thoughts and beliefs. Moreover, Te'osumatic medicine known as the God-body medicine, after the psychosomatic or psycho-body medicine confirms the impact of faith on the health and recovery of individuals. They believe that illness and death

  20. Becoming an Adult in a Community of Faith

    Science.gov (United States)

    Frye, Steven B.

    2014-01-01

    This chapter describes developmental needs of emerging young adults and how they are often met, or not met, in faith communities. The author offers recommendations for creating better connections with today's emerging young adults.

  1. FAITH IN THE ONE GOD IN CHRISTIAN AND AFRICAN ...

    African Journals Online (AJOL)

    Dr Ike

    The Bible is popularly referred to as the sacred Scripture or the. Word of God. The first ... Faith in the One God in Christian and African Traditional Religions. 57 ... interpretative dimension and takes place within the context of .... and nature.

  2. Photonic arbitrary waveform generator based on Taylor synthesis method

    DEFF Research Database (Denmark)

    Liao, Shasha; Ding, Yunhong; Dong, Jianji

    2016-01-01

    Arbitrary waveform generation has been widely used in optical communication, radar system and many other applications. We propose and experimentally demonstrate a silicon-on-insulator (SOI) on chip optical arbitrary waveform generator, which is based on Taylor synthesis method. In our scheme......, a Gaussian pulse is launched to some cascaded microrings to obtain first-, second- and third-order differentiations. By controlling amplitude and phase of the initial pulse and successive differentiations, we can realize an arbitrary waveform generator according to Taylor expansion. We obtain several typical...... waveforms such as square waveform, triangular waveform, flat-top waveform, sawtooth waveform, Gaussian waveform and so on. Unlike other schemes based on Fourier synthesis or frequency-to-time mapping, our scheme is based on Taylor synthesis method. Our scheme does not require any spectral disperser or large...

  3. Photonic arbitrary waveform generator based on Taylor synthesis method.

    Science.gov (United States)

    Liao, Shasha; Ding, Yunhong; Dong, Jianji; Yan, Siqi; Wang, Xu; Zhang, Xinliang

    2016-10-17

    Arbitrary waveform generation has been widely used in optical communication, radar system and many other applications. We propose and experimentally demonstrate a silicon-on-insulator (SOI) on chip optical arbitrary waveform generator, which is based on Taylor synthesis method. In our scheme, a Gaussian pulse is launched to some cascaded microrings to obtain first-, second- and third-order differentiations. By controlling amplitude and phase of the initial pulse and successive differentiations, we can realize an arbitrary waveform generator according to Taylor expansion. We obtain several typical waveforms such as square waveform, triangular waveform, flat-top waveform, sawtooth waveform, Gaussian waveform and so on. Unlike other schemes based on Fourier synthesis or frequency-to-time mapping, our scheme is based on Taylor synthesis method. Our scheme does not require any spectral disperser or large dispersion, which are difficult to fabricate on chip. Our scheme is compact and capable for integration with electronics.

  4. Krylov subspace acceleration of waveform relaxation

    Energy Technology Data Exchange (ETDEWEB)

    Lumsdaine, A.; Wu, Deyun [Univ. of Notre Dame, IN (United States)

    1996-12-31

    Standard solution methods for numerically solving time-dependent problems typically begin by discretizing the problem on a uniform time grid and then sequentially solving for successive time points. The initial time discretization imposes a serialization to the solution process and limits parallel speedup to the speedup available from parallelizing the problem at any given time point. This bottleneck can be circumvented by the use of waveform methods in which multiple time-points of the different components of the solution are computed independently. With the waveform approach, a problem is first spatially decomposed and distributed among the processors of a parallel machine. Each processor then solves its own time-dependent subsystem over the entire interval of interest using previous iterates from other processors as inputs. Synchronization and communication between processors take place infrequently, and communication consists of large packets of information - discretized functions of time (i.e., waveforms).

  5. Wavelet analysis of the impedance cardiogram waveforms

    Science.gov (United States)

    Podtaev, S.; Stepanov, R.; Dumler, A.; Chugainov, S.; Tziberkin, K.

    2012-12-01

    Impedance cardiography has been used for diagnosing atrial and ventricular dysfunctions, valve disorders, aortic stenosis, and vascular diseases. Almost all the applications of impedance cardiography require determination of some of the characteristic points of the ICG waveform. The ICG waveform has a set of characteristic points known as A, B, E ((dZ/dt)max) X, Y, O and Z. These points are related to distinct physiological events in the cardiac cycle. Objective of this work is an approbation of a new method of processing and interpretation of the impedance cardiogram waveforms using wavelet analysis. A method of computer thoracic tetrapolar polyrheocardiography is used for hemodynamic registrations. Use of original wavelet differentiation algorithm allows combining filtration and calculation of the derivatives of rheocardiogram. The proposed approach can be used in clinical practice for early diagnostics of cardiovascular system remodelling in the course of different pathologies.

  6. Waveform information from quantum mechanical entropy

    Science.gov (United States)

    Funkhouser, Scott; Suski, William; Winn, Andrew

    2016-06-01

    Although the entropy of a given signal-type waveform is technically zero, it is nonetheless desirable to use entropic measures to quantify the associated information. Several such prescriptions have been advanced in the literature but none are generally successful. Here, we report that the Fourier-conjugated `total entropy' associated with quantum-mechanical probabilistic amplitude functions (PAFs) is a meaningful measure of information in non-probabilistic real waveforms, with either the waveform itself or its (normalized) analytic representation acting in the role of the PAF. Detailed numerical calculations are presented for both adaptations, showing the expected informatic behaviours in a variety of rudimentary scenarios. Particularly noteworthy are the sensitivity to the degree of randomness in a sequence of pulses and potential for detection of weak signals.

  7. Waveform Design for Wireless Power Transfer

    Science.gov (United States)

    Clerckx, Bruno; Bayguzina, Ekaterina

    2016-12-01

    Far-field Wireless Power Transfer (WPT) has attracted significant attention in recent years. Despite the rapid progress, the emphasis of the research community in the last decade has remained largely concentrated on improving the design of energy harvester (so-called rectenna) and has left aside the effect of transmitter design. In this paper, we study the design of transmit waveform so as to enhance the DC power at the output of the rectenna. We derive a tractable model of the non-linearity of the rectenna and compare with a linear model conventionally used in the literature. We then use those models to design novel multisine waveforms that are adaptive to the channel state information (CSI). Interestingly, while the linear model favours narrowband transmission with all the power allocated to a single frequency, the non-linear model favours a power allocation over multiple frequencies. Through realistic simulations, waveforms designed based on the non-linear model are shown to provide significant gains (in terms of harvested DC power) over those designed based on the linear model and over non-adaptive waveforms. We also compute analytically the theoretical scaling laws of the harvested energy for various waveforms as a function of the number of sinewaves and transmit antennas. Those scaling laws highlight the benefits of CSI knowledge at the transmitter in WPT and of a WPT design based on a non-linear rectenna model over a linear model. Results also motivate the study of a promising architecture relying on large-scale multisine multi-antenna waveforms for WPT. As a final note, results stress the importance of modeling and accounting for the non-linearity of the rectenna in any system design involving wireless power.

  8. Analisis Konsep Abrahamic Faiths dan Kaitannya dengan Pluralisme Agama

    Directory of Open Access Journals (Sweden)

    Khadijah Mohd Khambali @ Hambali

    2012-12-01

    Full Text Available Abrahamic Faiths often referred to Judaism, Christianity and Islam that put this categorization based on a number of features common to all three religions in the same cluster. Terminology of Abrahamic Faiths within the contemporary real-world comparative religion has been manipulated by leaders to strengthen the concept of religious pluralism is not only related to the Abrahamic Faiths, but also related to wad'i religions on the basis of prophetic chronology of Abraham. In reality, the position of Abrahamic Faiths has evolved appropriate real philosophical doctrines that every reality is much different. Therefore, this study will reveal and analyze the concept of Abrahamic Faiths in the context of religious studies to provide clarification on the ambiguity arising out of the equation. In addition to analyzing relationship between religious pluralism that makes the concept of Abrahamic Faiths seen as one of the themes of religious generalizations on the basis of prophetic chronology equation as the way for religious tolerance.

  9. Faith-Based International Development Work: A Review

    Directory of Open Access Journals (Sweden)

    Dan Heist

    2016-02-01

    Full Text Available In the wake of the Faith-Based Initiative in the USA, substantial research has resulted in an increased awareness of religious congregations and faith-based organizations as welfare service providers. The next frontier appears to be the role of religious organizations in international social and economic development, a topic that only recently started to attract academic interest. In this paper, we review available literature on the role that religious, or faith-based, organizations play in international social and economic development. We also provide results from our own study of USA international NGOs1 that are faith-based. We divide the paper into the positive contributions of faith-based international NGOs and the drawbacks of these NGOs. We find that faith-based nonprofits constitute almost 60 percent of USA-based international development organizations, and their contribution to international social development is quite considerable. We conclude with a call for further research and nuanced understanding of the role religion plays in international development.

  10. Filter transient response to EEG waveforms.

    Science.gov (United States)

    Shirakawa, S; Smith, J R; Azumi, K

    1987-01-01

    The response of two types of linear filters to sinusoidal bursts was calculated to demonstrate how filters can distort EEG waveforms. Results show that the wider the filter bandwidth the less is the distortion, and for a given bandwidth, the higher the filter order the greater the distortion. The response of a linear phase filter was also calculated to demonstrate that this type of filter can also cause waveform distortion, although it is normally less than that caused by Butterworth, Tchebychev and elliptic filters.

  11. High-Energy Optical Parametric Waveform Synthesizer

    OpenAIRE

    Muecke, Oliver D.; Cirmi, G.; Fang, S.; Rossi, G. M.; Chia, Shih-Hsuan; Kärtner, F. X.; Manzoni, C.; Farinello, P.; Cerullo, and G.

    2014-01-01

    We discuss the ongoing development of a phase-stable, multi-mJ 3-channel parametric waveform synthesizer generating a 2-octave-wide spectrum (0.52-2.4μm). After two amplification stages, the combined >125-μJ output supports 1.9-fs waveforms. First preliminary FROG-characterization results of the second-stage outputs demonstrate the feasibility to recompress all three channels simultaneously close to the Fourier limit. Energy scaling to ~2 mJ is achieved after three amplification stages. The f...

  12. Principles of waveform diversity and design

    CERN Document Server

    Wicks, Michael

    2011-01-01

    This is the first book to discuss current and future applications of waveform diversity and design in subjects such as radar and sonar, communications systems, passive sensing, and many other technologies. Waveform diversity allows researchers and system designers to optimize electromagnetic and acoustic systems for sensing, communications, electronic warfare or combinations thereof. This book enables solutions to problems, explaining how each system performs its own particular function, as well as how it is affected by other systems and how those other systems may likewise be affected. It is

  13. Signal processing in noise waveform radar

    CERN Document Server

    Kulpa, Krzysztof

    2013-01-01

    This book is devoted to the emerging technology of noise waveform radar and its signal processing aspects. It is a new kind of radar, which use noise-like waveform to illuminate the target. The book includes an introduction to basic radar theory, starting from classical pulse radar, signal compression, and wave radar. The book then discusses the properties, difficulties and potential of noise radar systems, primarily for low-power and short-range civil applications. The contribution of modern signal processing techniques to making noise radar practical are emphasized, and application examples

  14. Fractal Dimension of Voice-Signal Waveforms

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The fractal dimension is one important parameter that characterizes waveforms. In this paper, we derive a new method to calculate fractal dimension of digital voice-signal waveforms. We show that fractal dimension is an efficient tool for speaker recognition or speech recognition. It can be used to identify different speakers or distinguish speech. We apply our results to Chinese speaker recognition and numerical experiment shows that fractal dimension is an efficient parameter to characterize individual Chinese speakers. We have developed a semiautomatic voiceprint analysis system based on the theory of this paper and former researches.

  15. Shaping public policy: a challenge in faith.

    Science.gov (United States)

    Hug, J E

    1984-05-01

    Religious health care's involvement in public policy is an essential part of Christian life. The most important way in which Catholic hospitals and health care systems can contribute to public policy is through faith-reflection upon their identity and calling. To guide the shaping of public policy, several theological models have been set forth. The theology of democratic capitalism is based on individual human creativity. As a system of political economy organized to prevent the centralization of government power, it thrives on free competition. Well- intentioned social programs that seek to equalize results, according to democratic capitalists , inevitably lead to greater government control and should be avoided. Inequality, in fact, according to this theory, can create incentive for individuals and industry to be more productive. The stewardship approach to theological reflection calls for a distribution of goods and services based on need. The right to health care, for example, is founded in God's gift of creation to all inhabitants. The resources of creation are allotted to individuals as property in a sense of cooperation and sharing. Thus, according to this notion, government programs that help society steward its resources wisely should be promoted. The U.S. bishops ' 1981 pastoral letter on health and health care presents a third model, which reflects on the dignity of human beings as images of God to guide public policy. Models, however, must not replace personal theological reflection. Catholic health care providers share a responsibility to evaluate social issues from their perspective as members of the healing ministry and to participate in public policy development.

  16. Faith-Based Organizations and Veteran Reintegration

    Science.gov (United States)

    Werber, Laura; Derose, Kathryn Pitkin; Rudnick, Mollie; Harrell, Margaret C.; Naranjo, Diana

    2015-01-01

    Abstract Faith-based organizations (FBOs) are an important community-based resource for veterans as they readjust to civilian life. Through interviews with both national-level and smaller, local FBOs, the authors sought to understand better the current and potential roles for FBOs in veteran reintegration. Interviewees suggested that veterans may look to FBOs for support because they offer privacy and confidentiality, two features that may be especially critical when a potential stigma is involved. Some FBOs have also developed a reputation as safe places for veterans, providing supportive, judgment-free environments. FBOs not only help veterans with spiritual matters but address diverse areas of veteran health and wellness, including vocation, education, financial and legal stability, shelter, access to goods and services, mental health, access to health care, physical health, family, and social networks. In some cases, the support is offered to veterans directly; in other instances, the support is indirect, via training individuals to help veterans or educating the public about them. In the process of providing support, FBOs interact with varied organizations, including government entities, private nonprofits, and one another, for training, outreach, referrals, information exchange, obtaining donations, and collaboration. Yet challenges exist, including insufficient connections with chaplains working in different settings and others in the web of support, resource and capacity constraints, lack of awareness of experience with veterans, issues related to religious philosophy or orientation, and characteristics of veterans themselves. To move forward, the authors offer recommendations for policymakers, organizations that interact with FBOs, and FBOs themselves to help FBOs engage fully in the web of reintegration support. PMID:28083391

  17. A template bank for gravitational waveforms from coalescing binary black holes: I. non-spinning binaries

    CERN Document Server

    Ajith, P; Chen, Y; Hewitson, M; Krishnan, B; Sintes, A M; Whelan, J T; Brügmann, B; Diener, P; Dorband, N; González, J; Hannam, M; Husa, S; Pollney, D; Rezzolla, L; Santamaria, L; Sperhake, U; Thornburg, J

    2007-01-01

    Gravitational waveforms from the inspiral and ring-down stages of the binary black hole coalescences can be modelled accurately by approximation/perturbation techniques in general relativity. Recent progress in numerical relativity has enabled us to model also the non-perturbative merger phase of the binary black-hole coalescence problem. This enables us to \\emph{coherently} search for all three stages of the coalescence of non-spinning binary black holes using a single template bank. Taking our motivation from these results, we propose a family of template waveforms which can model the inspiral, merger, and ring-down stages of the coalescence of non-spinning binary black holes that follow quasi-circular inspiral. This two-dimensional template family is explicitly parametrized by the physical parameters of the binary. We show that the template family is not only \\emph{effectual} in detecting the signals from black hole coalescences, but also \\emph{faithful} in estimating the parameters of the binary. We compa...

  18. A New Method of Designing Waveform Codebook

    Institute of Scientific and Technical Information of China (English)

    1998-01-01

    The codebook search takes much operation quantity in CELP coder. The paper puts forward a new method redesigning the waveform codebook known, and lists the experimental data. It has been proved that the operation complexity and transmission bit rate were decreased by using the new codebook, and the synthesis speech quality was high.

  19. Waveform Selectivity at the Same Frequency

    Science.gov (United States)

    Wakatsuchi, Hiroki; Anzai, Daisuke; Rushton, Jeremiah J.; Gao, Fei; Kim, Sanghoon; Sievenpiper, Daniel F.

    2015-01-01

    Electromagnetic properties depend on the composition of materials, i.e. either angstrom scales of molecules or, for metamaterials, subwavelength periodic structures. Each material behaves differently in accordance with the frequency of an incoming electromagnetic wave due to the frequency dispersion or the resonance of the periodic structures. This indicates that if the frequency is fixed, the material always responds in the same manner unless it has nonlinearity. However, such nonlinearity is controlled by the magnitude of the incoming wave or other bias. Therefore, it is difficult to distinguish different incoming waves at the same frequency. Here we present a new concept of circuit-based metasurfaces to selectively absorb or transmit specific types of waveforms even at the same frequency. The metasurfaces, integrated with schottky diodes as well as either capacitors or inductors, selectively absorb short or long pulses, respectively. The two types of circuit elements are then combined to absorb or transmit specific waveforms in between. This waveform selectivity gives us another degree of freedom to control electromagnetic waves in various fields including wireless communications, as our simulation reveals that the metasurfaces are capable of varying bit error rates in response to different waveforms. PMID:25866071

  20. Windowing Waveform Relaxation of Initial Value Problems

    Institute of Scientific and Technical Information of China (English)

    Yao-lin Jiang

    2006-01-01

    We present a windowing technique of waveform relaxation for dynamic systems. An effective estimation on window length is derived by an iterative error expression provided here. Relaxation processes can be speeded up if one takes the windowing technique in advance. Numerical experiments are given to further illustrate the theoretical analysis.

  1. Resolution analysis in full waveform inversion

    NARCIS (Netherlands)

    Fichtner, A.; Trampert, J.

    2011-01-01

    We propose a new method for the quantitative resolution analysis in full seismic waveform inversion that overcomes the limitations of classical synthetic inversions while being computationally more efficient and applicable to any misfit measure. The method rests on (1) the local quadratic approximat

  2. Seismic Waveform Inversion by Stochastic Optimization

    Directory of Open Access Journals (Sweden)

    Tristan van Leeuwen

    2011-01-01

    Full Text Available We explore the use of stochastic optimization methods for seismic waveform inversion. The basic principle of such methods is to randomly draw a batch of realizations of a given misfit function and goes back to the 1950s. The ultimate goal of such an approach is to dramatically reduce the computational cost involved in evaluating the misfit. Following earlier work, we introduce the stochasticity in waveform inversion problem in a rigorous way via a technique called randomized trace estimation. We then review theoretical results that underlie recent developments in the use of stochastic methods for waveform inversion. We present numerical experiments to illustrate the behavior of different types of stochastic optimization methods and investigate the sensitivity to the batch size and the noise level in the data. We find that it is possible to reproduce results that are qualitatively similar to the solution of the full problem with modest batch sizes, even on noisy data. Each iteration of the corresponding stochastic methods requires an order of magnitude fewer PDE solves than a comparable deterministic method applied to the full problem, which may lead to an order of magnitude speedup for waveform inversion in practice.

  3. Analog circuit design designing waveform processing circuits

    CERN Document Server

    Feucht, Dennis

    2010-01-01

    The fourth volume in the set Designing Waveform-Processing Circuits builds on the previous 3 volumes and presents a variety of analog non-amplifier circuits, including voltage references, current sources, filters, hysteresis switches and oscilloscope trigger and sweep circuitry, function generation, absolute-value circuits, and peak detectors.

  4. Processing Waveforms as Trees for Pattern Recognition.

    Science.gov (United States)

    1986-05-01

    patterns (after Ganong (15]) 5.7 ECG Classification As in the previous example, waveforms were simulated with additive colored gaussian noise. In order to...Principles and Techniques- (AAPG Course Note Series 13), Amer. Assoc. Pet. Geol., Tulsa, OK,p. 86, (1984). [15] W. F. Ganong , Review of Medical Physiology. Lange, Los Altos, CA. pp. 393-408, (1973). /

  5. Doppler flow velocity waveforms in the fetal cardiac outflow tract: Reproducibility of waveform recording and analysis

    NARCIS (Netherlands)

    I.A.L. Groenenberg (Irene); W.C.J. Hop (Wim); J.W. Wladimiroff (Juriy)

    1991-01-01

    markdownabstract__Abstract__ Reproducibility of flow velocity waveform recording and analysis was studied at fetal cardiac level (ductus arteriosus, pulmonary artery and ascending aorta) in 42 normal pregnancies. The flow velocity parameters studied were the peak systolic velocity (PSV),

  6. SAR processing with non-linear FM chirp waveforms.

    Energy Technology Data Exchange (ETDEWEB)

    Doerry, Armin Walter

    2006-12-01

    Nonlinear FM (NLFM) waveforms offer a radar matched filter output with inherently low range sidelobes. This yields a 1-2 dB advantage in Signal-to-Noise Ratio over the output of a Linear FM (LFM) waveform with equivalent sidelobe filtering. This report presents details of processing NLFM waveforms in both range and Doppler dimensions, with special emphasis on compensating intra-pulse Doppler, often cited as a weakness of NLFM waveforms.

  7. Science instruction in the context of Christian faith

    Science.gov (United States)

    Schroeder, Brock Cameron

    One of the issues faced in higher education involves the development of scientifically literate undergraduate students (NRC, 1996). Developing science literacy needs to take into account the various aspects of resistance students have toward science because of their personal faith. There is a need to know more about the effective strategies that science faculty in a Christian, faith-based institution use to assist their undergraduate students in dealing with the apparent conflict between science and faith. The purpose of this study was to analyze how these faculty members develop scientifically literate students. Through descriptive qualitative analysis, interview and questionnaire data were analyzed to discover science faculty perceptions of student tension with faith and science and to elicit faculty use of conceptual change teaching strategies. It was discovered that faculty participants perceive that their students experience such a tension. Students generally view the two as conflicting or independent of each other. Also, it was found that the conceptual change strategies were used to some extent by all participants. The data revealed three themes: time, talk, and trust. Conceptual change is accomplished over time through a learning environment rich with instruction and experimentation. These strategies allow for increasing science literacy through self-reflection and conversations. Trust is built through faculty modeling of the process of science and its integration with personal faith. Increasing science literacy in the college population has potential for social change by producing adults capable of making more informed political and ethical decisions.

  8. Frequency of Faith and Spirituality Discussion in Health Care.

    Science.gov (United States)

    Bergamo, David; White, Dawn

    2016-04-01

    Faith and spirituality are important in the lives of many individuals, and therefore, many patients. This study was performed to determine whether faith and spirituality are active part of the healthcare field and patients' receipt of these sometimes delicate topics. The nuances of the concepts of faith, spirituality, and religion and their implications in the healthcare setting are discussed. Benefits and detriments of faith and spirituality are reviewed in terms of how they relate to the health of the patient and to the healthcare field. With the focus of healthcare shifting to holistic care, this conversation may be more necessary than ever in practice, yet it seems many providers are not discussing these matters with patients. The study analyzes whether healthcare providers are discussing these topics with patients and how the discussion is received or would be received by patients. Findings demonstrate the infrequency of the discussion regardless of the fact that the majority of patients consider themselves faithful or spiritual. This study was approved by the Clarkson University Institutional Review Board on June 18, 2104.

  9. Faith healing and the field of healthcare in Brazil

    Directory of Open Access Journals (Sweden)

    Rodolfo Franco Puttini

    2008-01-01

    Full Text Available The general aim of the present paper was to contribute towards the discussion on the field of healthcare. Specifically, the aim was to contribute towards reflections on the hegemonic power of medicine and its relationships with practices of faith healing. Taking into account the field and habitus of Pierre Bourdieu's theory, faith healing is discussed based on a review of the concept of trance in the intellectual field as an object of scientific habitus formed between medical practice and religious practice. Finally, by means of contemporary themes shared by social sciences and public health, it is shown how faith healing - a negative term within the field of medicine - is transformed into a positive term within the field of public health.

  10. Application of arbitrary waveform generator for noise radar

    Science.gov (United States)

    Lukin, Konstantin A.; Zemlyaniy, Oleg V.; Vyplavin, Pavlo L.; Palamarchuk, Volodymyr P.

    2011-10-01

    The approach, when the waveforms of different types are exploited in the same radar (waveform diversity) requires new-generation sources of initial signals. For generating of different types of waveforms in the same radar we suggest using Arbitrary Waveform Generator, that allows output any type of pre-programmed signal in real time. We have carried out preliminary experimental tests of the stepped-delay mode of UHF-band radar evaluation kit. The series of experimental testing shows efficiency AWG application in radar with variety of sounding waveforms.

  11. Estimation of central aortic pressure waveform features derived from the brachial cuff volume displacement waveform.

    Science.gov (United States)

    Butlin, Mark; Qasem, Ahmad; Avolio, Alberto P

    2012-01-01

    There is increasing interest in non-invasive estimation of central aortic waveform parameters in the clinical setting. However, controversy has arisen around radial tonometric based systems due to the requirement of a trained operator or lack of ease of use, especially in the clinical environment. A recently developed device utilizes a novel algorithm for brachial cuff based assessment of aortic pressure values and waveform (SphygmoCor XCEL, AtCor Medical). The cuff was inflated to 10 mmHg below an individual's diastolic blood pressure and the brachial volume displacement waveform recorded. The aortic waveform was derived using proprietary digital signal processing and transfer function applied to the recorded waveform. The aortic waveform was also estimated using a validated technique (radial tonometry based assessment, SphygmoCor, AtCor Medical). Measurements were taken in triplicate with each device in 30 people (17 female) aged 22 to 79 years of age. An average for each device for each individual was calculated, and the results from the two devices were compared using regression and Bland-Altman analysis. A high correlation was found between the devices for measures of aortic systolic (R(2)=0.99) and diastolic (R(2)=0.98) pressure. Augmentation index and subendocardial viability ratio both had a between device R(2) value of 0.82. The difference between devices for measured aortic systolic pressure was 0.5±1.8 mmHg, and for augmentation index, 1.8±7.0%. The brachial cuff based approach, with an individualized sub-diastolic cuff pressure, provides an operator independent method of assessing not only systolic pressure, but also aortic waveform features, comparable to existing validated tonometric-based methods.

  12. Programmable Clock Waveform Generation for CCD Readout

    Energy Technology Data Exchange (ETDEWEB)

    Vicente, J. de; Castilla, J.; Martinez, G.; Marin, J.

    2006-07-01

    Charge transfer efficiency in CCDs is closely related to the clock waveform. In this paper, an experimental framework to explore different FPGA based clock waveform generator designs is described. Two alternative design approaches for controlling the rise/fall edge times and pulse width of the CCD clock signal have been implemented: level-control and time-control. Both approaches provide similar characteristics regarding the edge linearity and noise. Nevertheless, dissimilarities have been found with respect to the area and frequency range of application. Thus, while the time-control approach consumes less area, the level control approach provides a wider range of clock frequencies since it does not suffer capacitor discharge effect. (Author) 8 refs.

  13. LISA parameter estimation using numerical merger waveforms

    Energy Technology Data Exchange (ETDEWEB)

    Thorpe, J I; McWilliams, S T; Kelly, B J; Fahey, R P; Arnaud, K; Baker, J G, E-mail: James.I.Thorpe@nasa.go [NASA Goddard Space Flight Center, 8800 Greenbelt Rd, Greenbelt, MD 20771 (United States)

    2009-05-07

    Recent advances in numerical relativity provide a detailed description of the waveforms of coalescing massive black hole binaries (MBHBs), expected to be the strongest detectable LISA sources. We present a preliminary study of LISA's sensitivity to MBHB parameters using a hybrid numerical/analytic waveform for equal-mass, non-spinning holes. The Synthetic LISA software package is used to simulate the instrument response, and the Fisher information matrix method is used to estimate errors in the parameters. Initial results indicate that inclusion of the merger signal can significantly improve the precision of some parameter estimates. For example, the median parameter errors for an ensemble of systems with total redshifted mass of 10{sup 6} M{sub o-dot} at a redshift of z approx 1 were found to decrease by a factor of slightly more than two for signals with merger as compared to signals truncated at the Schwarzchild ISCO.

  14. LISA parameter estimation using numerical merger waveforms

    CERN Document Server

    Thorpe, J I; Kelly, B J; Fahey, R P; Arnaud, K; Baker, J G

    2008-01-01

    Recent advances in numerical relativity provide a detailed description of the waveforms of coalescing massive black hole binaries (MBHBs), expected to be the strongest detectable LISA sources. We present a preliminary study of LISA's sensitivity to MBHB parameters using a hybrid numerical/analytic waveform for equal-mass, non-spinning holes. The Synthetic LISA software package is used to simulate the instrument response and the Fisher information matrix method is used to estimate errors in the parameters. Initial results indicate that inclusion of the merger signal can significantly improve the precision of some parameter estimates. For example, the median parameter errors for an ensemble of systems with total redshifted mass of one million Solar masses at a redshift of one were found to decrease by a factor of slightly more than two for signals with merger as compared to signals truncated at the Schwarzchild ISCO.

  15. Comparing numerical and analytic approximate gravitational waveforms

    Science.gov (United States)

    Afshari, Nousha; Lovelace, Geoffrey; SXS Collaboration

    2016-03-01

    A direct observation of gravitational waves will test Einstein's theory of general relativity under the most extreme conditions. The Laser Interferometer Gravitational-Wave Observatory, or LIGO, began searching for gravitational waves in September 2015 with three times the sensitivity of initial LIGO. To help Advanced LIGO detect as many gravitational waves as possible, a major research effort is underway to accurately predict the expected waves. In this poster, I will explore how the gravitational waveform produced by a long binary-black-hole inspiral, merger, and ringdown is affected by how fast the larger black hole spins. In particular, I will present results from simulations of merging black holes, completed using the Spectral Einstein Code (black-holes.org/SpEC.html), including some new, long simulations designed to mimic black hole-neutron star mergers. I will present comparisons of the numerical waveforms with analytic approximations.

  16. Christian Faith Rush in Rural Areas and Social Work Intervention

    Institute of Scientific and Technical Information of China (English)

    ZHAO Jian-ling; WANG Shu-min

    2012-01-01

    To make the public have rational knowledge of the Christian faith rush in rural areas and guide coordinated development of Christianity with the socialist society, we analyzed reasons and complex influence on rural social development from aspects of society and individual and attraction of Christianity by the Literature Analysis Method. In view of its negative effect, we put forward several countermeasures from the perspective of social work intervention, such as improving farmers’ overall qualities, promoting effective implementation of social security system, and correcting believers’ understanding of Christianity. Finally, we introduced situation of Christian faith in other countries and reference and directive significance to China.

  17. Advanced Waveform Simulation for Seismic Monitoring

    Science.gov (United States)

    2008-09-01

    velocity model. The method separates the main arrivals of the regional waveform into 5 windows: Pnl (vertical and radial components), Rayleigh (vertical and...ranges out to 10°, including extensive observations of crustal thinning and thickening and various Pnl complexities. Broadband modeling in 1D, 2D...existing models perform in predicting the various regional phases, Rayleigh waves, Love waves, and Pnl waves. Previous events from this Basin-and-Range

  18. The European seismological waveform framework EIDA

    Science.gov (United States)

    Trani, Luca; Koymans, Mathijs; Quinteros, Javier; Heinloo, Andres; Euchner, Fabian; Strollo, Angelo; Sleeman, Reinoud; Clinton, John; Stammler, Klaus; Danecek, Peter; Pedersen, Helle; Ionescu, Constantin; Pinar, Ali; Evangelidis, Christos

    2017-04-01

    The ORFEUS1 European Integrated Data Archive (EIDA2) federates (currently) 11 major European seismological data centres into a common organisational and operational framework which offers: (a) transparent and uniform access tools, advanced services and products for seismological waveform data; (b) a platform for establishing common policies for the curation of seismological waveform data and the description of waveform data by standardised quality metrics; (c) proper attribution and citation (e.g. data ownership). After its establishment in 2013, EIDA has been collecting and distributing seamlessly large amounts of seismological data and products to the research community and beyond. A major task of EIDA is the on-going improvement of the services, tools and products portfolio in order to meet the increasingly demanding users' requirements. At present EIDA is entering a new operational phase and will become the reference infrastructure for seismological waveform data in the pan-European infrastructure for solid-Earth science: EPOS (European Plate Observing System)3. The EIDA Next Generation developments, initiated within the H2020 project EPOS-IP, will provide a new infrastructure that will support the seismological and multidisciplinary EPOS community facilitating interoperability in a broader context. EIDA NG comprises a number of new services and products e.g.: Routing Service, Authentication Service, WFCatalog, Mediator, Station Book and more in the near future. In this contribution we present the current status of the EIDA NG developments and provide an overview of the usage of the new services and their impact on the user community. 1 www.orfeus-eu.org/ 2 www.orfeus-eu.org/eida/eida.html 3 www.epos-ip.org

  19. Waveforms Measured in Confined Thermobaric Explosion

    Energy Technology Data Exchange (ETDEWEB)

    Reichenbach, H; Neuwald, P; Kuhl, A L

    2007-05-04

    Experiments with 1.5-g Shock-Dispersed-Fuel (SDF) charges have been conducted in six different chambers. Both flake Aluminum and TNT were used as the fuel. Static pressure gauges on the chamber wall were the main diagnostic. Waveforms for explosions in air were significantly larger than those in nitrogen - thereby demonstrating a strong thermobaric (combustion) effect. This effect increases as the confinement volume decreases and the mixture richness approaches 1.

  20. Full-waveform inversion: Filling the gaps

    KAUST Repository

    Beydoun, Wafik B.

    2015-09-01

    After receiving an outstanding response to its inaugural workshop in 2013, SEG once again achieved great success with its 2015 SEG Middle East Workshop, “Full-waveform inversion: Filling the gaps,” which took place 30 March–1 April 2015 in Abu Dhabi, UAE. The workshop was organized by SEG, and its partner sponsors were Saudi Aramco (gold sponsor), ExxonMobil, and CGG. Read More: http://library.seg.org/doi/10.1190/tle34091106.1

  1. Sparse Frequency Waveform Design for Radar-Embedded Communication

    Directory of Open Access Journals (Sweden)

    Chaoyun Mai

    2016-01-01

    Full Text Available According to the Tag application with function of covert communication, a method for sparse frequency waveform design based on radar-embedded communication is proposed. Firstly, sparse frequency waveforms are designed based on power spectral density fitting and quasi-Newton method. Secondly, the eigenvalue decomposition of the sparse frequency waveform sequence is used to get the dominant space. Finally the communication waveforms are designed through the projection of orthogonal pseudorandom vectors in the vertical subspace. Compared with the linear frequency modulation waveform, the sparse frequency waveform can further improve the bandwidth occupation of communication signals, thus achieving higher communication rate. A certain correlation exists between the reciprocally orthogonal communication signals samples and the sparse frequency waveform, which guarantees the low SER (signal error rate and LPI (low probability of intercept. The simulation results verify the effectiveness of this method.

  2. Time-dependent phase error correction using digital waveform synthesis

    Energy Technology Data Exchange (ETDEWEB)

    Doerry, Armin W.; Buskirk, Stephen

    2017-10-10

    The various technologies presented herein relate to correcting a time-dependent phase error generated as part of the formation of a radar waveform. A waveform can be pre-distorted to facilitate correction of an error induced into the waveform by a downstream operation/component in a radar system. For example, amplifier power droop effect can engender a time-dependent phase error in a waveform as part of a radar signal generating operation. The error can be quantified and an according complimentary distortion can be applied to the waveform to facilitate negation of the error during the subsequent processing of the waveform. A time domain correction can be applied by a phase error correction look up table incorporated into a waveform phase generator.

  3. Continuous high PRF waveforms for challenging environments

    Science.gov (United States)

    Jaroszewski, Steven; Corbeil, Allan; Ryland, Robert; Sobota, David

    2017-05-01

    Current airborne radar systems segment the available time-on-target during each beam dwell into multiple Coherent Processing Intervals (CPIs) in order to eliminate range eclipsing, solve for unambiguous range, and increase the detection performance against larger Radar Cross Section (RCS) targets. As a consequence, these radars do not realize the full Signal-to-Noise Ratio (SNR) increase and detection performance improvement that is possible. Continuous High Pulse Repetition Frequency (HPRF) waveforms and processing enables the coherent integration of all available radar data over the full time-on-target. This can greatly increase the SNR for air targets at long range and/or with weak radar returns and significantly improve the detection performance against such targets. TSC worked with its partner KeyW to implement a Continuous HPRF waveform in their Sahara radar testbed and obtained measured radar data on both a ground vehicle target and an airborne target of opportunity. This experimental data was processed by TSC to validate the expected benefits of Continuous HPRF waveforms.

  4. Binary Black Holes: Mergers, Dynamics, and Waveforms

    Science.gov (United States)

    Centrella, Joan

    2007-04-01

    The final merger of two black holes is expected to be the strongest gravitational wave source for ground-based interferometers such as LIGO, VIRGO, and GEO600, as well as the space-based interferometer LISA. Observing these sources with gravitational wave detectors requires that we know the radiation waveforms they emit. Since these mergers take place in regions of extreme gravity, we need to solve Einstein's equations of general relativity on a computer in order to calculate these waveforms. For more than 30 years, scientists have tried to compute black hole mergers using the methods of numerical relativity. The resulting computer codes have been plagued by instabilities, causing them to crash well before the black holes in the binary could complete even a single orbit. Within the past few years, however, this situation has changed dramatically, with a series of remarkable breakthroughs. This talk will focus on new simulations that are revealing the dynamics and waveforms of binary black hole mergers, and their applications in gravitational wave detection, data analysis, and astrophysics.

  5. Full waveform inversion for ultrasonic flaw identification

    Science.gov (United States)

    Seidl, Robert; Rank, Ernst

    2017-02-01

    Ultrasonic Nondestructive Testing is concerned with detecting flaws inside components without causing physical damage. It is possible to detect flaws using ultrasound measurements but usually no additional details about the flaw like position, dimension or orientation are available. The information about these details is hidden in the recorded experimental signals. The idea of full waveform inversion is to adapt the parameters of an initial simulation model of the undamaged specimen by minimizing the discrepancy between these simulated signals and experimentally measured signals of the flawed specimen. Flaws in the structure are characterized by a change or deterioration in the material properties. Commonly, full waveform inversion is mostly applied in seismology on a larger scale to infer mechanical properties of the earth. We propose to use acoustic full waveform inversion for structural parameters to visualize the interior of the component. The method is adapted to US NDT by combining multiple similar experiments on the test component as the typical small amount of sensors is not sufficient for a successful imaging. It is shown that the combination of simulations and multiple experiments can be used to detect flaws and their position, dimension and orientation in emulated simulation cases.

  6. The Waveform Server: A Web-based Interactive Seismic Waveform Interface

    Science.gov (United States)

    Newman, R. L.; Clemesha, A.; Lindquist, K. G.; Reyes, J.; Steidl, J. H.; Vernon, F. L.

    2009-12-01

    Seismic waveform data has traditionally been displayed on machines that are either local area networked to, or directly host, a seismic networks waveform database(s). Typical seismic data warehouses allow online users to query and download data collected from regional networks passively, without the scientist directly visually assessing data coverage and/or quality. Using a suite of web-based protocols, we have developed an online seismic waveform interface that directly queries and displays data from a relational database through a web-browser. Using the Python interface to Datascope and the Python-based Twisted network package on the server side, and the jQuery Javascript framework on the client side to send and receive asynchronous waveform queries, we display broadband seismic data using the HTML Canvas element that is globally accessible by anyone using a modern web-browser. The system is used to display data from the USArray experiment, a US continent-wide migratory transportable seismic array. We are currently creating additional interface tools to create a rich-client interface for accessing and displaying seismic data that can be deployed to any system running Boulder Real Time Technology's (BRTT) Antelope Real Time System (ARTS). The software is freely available from the Antelope contributed code Git repository. Screenshot of the web-based waveform server interface

  7. Processing Aftershock Sequences Using Waveform Correlation

    Science.gov (United States)

    Resor, M. E.; Procopio, M. J.; Young, C. J.; Carr, D. B.

    2008-12-01

    For most event monitoring systems, the objective is to keep up with the flow of incoming data, producing a bulletin with some modest, relatively constant, time delay after present time, often a period of a few hours or less. Because the association problem scales exponentially and not linearly with the number of detections, a dramatic increase in seismicity due to an aftershock sequence can easily cause the bulletin delay time to increase dramatically. In some cases, the production of a bulletin may cease altogether, until the automatic system can catch up. For a nuclear monitoring system, the implications of such a delay could be dire. Given the expected similarity between a mainshock and aftershocks, it has been proposed that waveform correlation may provide a powerful means to simultaneously increase the efficiency of processing aftershock sequences, while also lowering the detection threshold and improving the quality of the event solutions. However, many questions remain unanswered. What are the key parameters for achieving the best correlations between waveforms (window length, filtering, etc.), and are they sequence-dependent? What is the overall percentage of similar events in an aftershock sequence, i.e. what is the maximum level of efficiency that a waveform correlation could be expected to achieve? Finally, how does this percentage of events vary among sequences? Using data from the aftershock sequence for the December 26, 2004 Mw 9.1 Sumatra event, we investigate these issues by building and testing a prototype waveform correlation event detection system that automatically expands its library of known events as new signatures are indentified in the aftershock sequence (by traditional signal detection and event processing). Our system tests all incoming data against this dynamic library, thereby identify any similar events before traditional processing takes place. In the region surrounding the Sumatra event, the NEIC EDR contains 4997 events in the 9

  8. The Multiple Waveform Persistent Peak (MWaPP) Retracker for SAR waveforms

    DEFF Research Database (Denmark)

    Villadsen, Heidi; Andersen, Ole Baltazar; Stenseng, Lars

    using CryoSat-2 20Hz SAR data, but due to the similarities between the Sentinel-3 SRAL altimeter and the SIRAL altimeter on-board CryoSat-2 an adaption of the method will be straightforward. The MWaPP retracker is based on a sub-waveform retracker, but takes the shape of adjacent waveforms into account...... before selecting the sub-waveform belonging to nadir. This is new compared to primary peak retrackers, and alleviates a lot of snagging due to off-nadir bright targets, but also topography challenges. The results from the MWaPP retracker show a significant decrease in the standard deviation of the mean...

  9. A Latina Theological Reflection on Education, Faith, Love, and Beauty

    Science.gov (United States)

    González-Andrieu, Cecilia

    2016-01-01

    In this article, Cecilia González-Andrieu presents what she defines as a theological reflection. She writes that it is theological in that she engages jointly faith and reason, the religious tradition of the Catholic Church and the contemporary situation. What makes it theological "reflection" is that it arises out of a community of…

  10. Institutionalizing Faith-Based Management Education in a Catholic University

    Science.gov (United States)

    Teehankee, Benito

    2012-01-01

    De La Salle University started in the Philippines as a Catholic school of business in 1911 through the initiative of Archbishop Harty of Manila. Its faith-based orientation gave way to a more secular one in the following decades as it adopted the more scientific and technical approaches of Western business schools. Recent changes in the…

  11. Thomas Aquinas: Integrating Faith and Reason in the Catholic School

    Science.gov (United States)

    Doyle, Dennis M.

    2007-01-01

    The Second Vatican Council, social upheaval, and quickly changing cultural norms were a part of the fabric of life in the 1960s. Values and beliefs held firmly for generations were called into question. Faith, once solid, appeared to some Catholics to turn fluid and doubtful. Though now well over seven centuries old, the work of Thomas Aquinas can…

  12. Faithful to science the role of science in religion

    CERN Document Server

    Steane, Andrew M

    2014-01-01

    Science and religious faith are two of the most important and influential forces in human life, yet there is widespread confusion about how, or indeed whether, they link together. This book describes this combination from the perspective of one who finds that they link together productively and creatively.

  13. Are Religion or "Faith" Necessary for a Moral Sexual Ethos?

    Science.gov (United States)

    Klein, Marty

    2011-01-01

    Credit the editor of the American Journal of Sexuality Education for inviting an article on whether religion or faith is necessary for a moral sexual ethos. Credit organized religion for creating a global cultural narrative in which this question would even be asked. Most articles answer a central question. This article challenges the central…

  14. Are Religion or "Faith" Necessary for a Moral Sexual Ethos?

    Science.gov (United States)

    Klein, Marty

    2011-01-01

    Credit the editor of the American Journal of Sexuality Education for inviting an article on whether religion or faith is necessary for a moral sexual ethos. Credit organized religion for creating a global cultural narrative in which this question would even be asked. Most articles answer a central question. This article challenges the central…

  15. 7 CFR 762.103 - Full faith and credit.

    Science.gov (United States)

    2010-01-01

    ... misrepresentation. The loan guarantee constitutes an obligation supported by the full faith and credit of the United States. The Agency may contest the guarantee only in cases of fraud or misrepresentation by a lender or holder, in which: (1) The lender or holder had actual knowledge of the fraud or misrepresentation at the...

  16. Faith and Reason in a Post Secular Age

    Science.gov (United States)

    Radford, Mike

    2012-01-01

    The problems that this article seeks to address are those that are raised in the context of the bilateralism that is established when we think in terms of secularism as primarily orientated towards reason and post secularism, towards faith. The objective of the article is to show that the distinction between the two can be collapsed. Post…

  17. Some remarks on the conflict between faith and science

    Directory of Open Access Journals (Sweden)

    Tadeusz Pabjan

    2016-04-01

    Full Text Available This paper deals with the conflict between faith and science. Since the issue is extensive, only selected aspects of this question are discussed. At first, the origin of the problem is outlined – it is argued, that the fundamental difference between the language and the method of science on one hand and of theology understood as a rational reflection on the truths of faith on the other is responsible for the conflict. Afterwards, two aspects of the conflict are presented – the first one concerns inconsistencies which appear on the plane of content – when some scientific statements or theorems seem to deny some theological claims; the second one involves differences in mentality and in worldview which appear on the plane of attitude. It is argued, that the content discrepancies can be eliminated with the help of two methods: of separation and of catharsis. But the differences in mentality which appear on the plane of attitude cannot be so easily eliminated. So finally the characteristics of these two different attitudes – of faith and of science – is discussed. It is argued, that a fundamental dissimilarity between the character of scientific knowledge (especially its empiricism and of religious faith is a basic source of mutual estrangement and alienation.

  18. Understanding Public Attitudes in Britain towards Faith Schools

    Science.gov (United States)

    Clements, Ben

    2010-01-01

    This paper provides a detailed analysis of different aspects of public attitudes towards faith schools in Britain. It examines two questions relating to government policy on this issue and two questions that ask about the perceived outcomes of this type of school. After discussing existing public opinion on this issue it uses data from the British…

  19. 24 CFR 3500.7 - Good faith estimate.

    Science.gov (United States)

    2010-04-01

    ... 24 Housing and Urban Development 5 2010-04-01 2010-04-01 false Good faith estimate. 3500.7 Section 3500.7 Housing and Urban Development Regulations Relating to Housing and Urban Development (Continued) OFFICE OF ASSISTANT SECRETARY FOR HOUSING-FEDERAL HOUSING COMMISSIONER, DEPARTMENT OF HOUSING AND...

  20. Faith-based Organisations, Development and the World Bank (abstract

    Directory of Open Access Journals (Sweden)

    Jeffrey Haynes

    2013-02-01

    Full Text Available Faith-based organisations (FBOs have increasingly become important actors in international development cooperation. Many international institutions recognise them as valuable partners and declare to have ‘mainstreamed faith’ within their own activities. But is this really the case? And how has this happened? Focusing on the activities of the World Bank in the 1995–2005 period, when, under the leadership of President James Wolfensohn and Katherine Marshall, then Head of the Bank’s Development Dialogue on Values and Ethics (DDVE, the institution engaged with some selected FBOs, this chapter enquires into the reasons for the Bank’s interest in faith as well as its sudden disappearance. It argues that the main rationale for engagement with faith lay in the disappointing results of previous secular strategies and the feeling that religion had a positive role to play in fighting poverty. However, diverging perceptions of poverty and development between states and religious entities, along with lingering suspicions among state officials about dealing with faith in the public realm, derailed the collaboration.

  1. Teaching the Devout Student: Faith and Scholarship in the Classroom

    Science.gov (United States)

    Smith, Brian H.

    2013-01-01

    Increasing numbers of college students enrolling in religion courses in recent years are looking to develop their religious faith or spirituality, while professors of religion want students to use and appreciate scholarly tools to study religion from an academic perspective. Some scholars argue that it is not possible to satisfy both goals in the…

  2. Tabligh Jamaat: A transnational movement of Islamic faith regeneration

    Directory of Open Access Journals (Sweden)

    Jan A. Ali

    2016-02-01

    Full Text Available The Tabligh Jama'at (Convey Group or Group for conveying the message of Islam established in 1927 in Mwt in India is an independent transnational movement of Islamic faith regeneration. It is an offshoot of Deoband movement and emerged in direct response to Hindu Arya Samaj sect which was seen by the Tablgh Jama'at as a threat to vulnerable and non-practicing Muslims. From its humble beginnings in Mwt Tabligh Jama'at gradually grew from local to national settings and ultimately traversed the globe by entering over two hundred countries becoming the world's largest transnational movement of Islamic faith regeneration. Its success is mainly due to its itinerant preaching style which revolves around rudimentary teaching and its Six Principles. This paper looks at the genesis of the Tabligh Jama'at in the crisis situation of the people of Islamic faith. It argues that he growth and development of the Tablgh Jama'at as the world's largest transnational movement of Islamic faith regeneration is attributed to its response largely to the negative consequences of modernity or to the crisis situation in specific local context. However, the rise of Tabligh Jama'at is also in part due to its ability to negotiate through modernity rather than destroying it.

  3. A Comparative Study of Saint Paul and Fakhri Razi on Faith

    Directory of Open Access Journals (Sweden)

    Ghorban Elmi

    2014-09-01

    Full Text Available Faith has a central place in Abrahamic religions. Jewish, Christian and Moslem thinkers have conducted several studies of the notion of faith and offered different ideas. Fakhri Razi and Saint Paul, two thinkers from Islamic and Christian religious traditions, have commented on the matter at length and these comments and ideas are studied in this essay.    Paul the Apostle (died 64 AD is the most famous and influential Christian figure and is known as the second founder of Christianity. He has an indispensable role in formulating Christian doctrines. At first, he was a Jew and after the revelation of Jesus, converted to Christianity and dedicated himself to evangelism. The only credible reports and first hand sources about the lives and beliefs of Paul are the Acts of the Apostles and his letters and epistles in the Bible.    The background of the debate on faith should be sought for in the Old Testament. In the Old Testament, belief means trusting in God, relying on Him, and recognizing and acknowledging the special relationship that God has established with Israel. In the New Testament, belief has a significant position too. Faith in the New Testament is more epistemic and cognitive and means certain belief and conviction. According to Paul faith is the basic principle of Christianity and outstanding feature of Christians and the main cause of salvation. In the early Christianity, Paul offers the most extensive and most profound exposition of faith.    In defining faith, Paul uses Greek word «pistis» which means confidence, faith and trust. In definition of faith, he says: "Faith is the confidence that what we hope will be, and faith is the certainty of what we believe, although we are not able to see them "(Hebrews, 11/1. He mentions Abraham as a distinguished example for introducing true faith and faithful. Faith in Jesus means to trust or have confidence in Jesus Christ. According to Paul, faith is based on hope in things which have

  4. Faith-to-faith at the bedside: theological and ethical issues in ecumenical clinical chaplaincy.

    Science.gov (United States)

    Mellon, Brad F

    2003-04-01

    Chaplains who serve in a clinical context often minister to patients representing a wide variety of faiths. In order to offer the best pastoral care possible, the chaplain should first possess a set of personal theological convictions as a foundation for ministry. Second, he or she needs to be sensitive to the beliefs and practices of the patients. Third, it is vital to develop a relationship of acceptance and trust not only with patients under their care, but also with family members and caregivers as well. At times, situations will arise that are purely religious or theological. In a clinical setting, however, the questions and problems that arise more often are both theological and ethical. It is beneficial for the chaplain to be involved in an ethics committee, where the specifics of each case can be discussed, and staff can offer counsel to patients and their families. This study examines issues that chaplains face at the bedside, such as terminal care, life-prolonging treatments, dementia, persistent vegetative state, and euthanasia-assisted suicide. We will discover that those who are involved in clinical pastoral ministry will be called upon to be a comforter, mediator, educator, ethicist, and counselor.

  5. GOOD FAITH AND FAIR DEALING IN THE COMMERCIAL CONTRACT LAW

    Directory of Open Access Journals (Sweden)

    Viktorija Budreckienė

    2014-08-01

    Full Text Available Purpose – to analyze the commercial concept of good faith and fair dealing applicable in the UNIDROIT Principles of International Commercial Contracts, Draft Common Frame of Reference and Lithuanian commercial contract law. Methodology – theoretical methods (analytic and systematic had been applied in the research. Findings – the author of the article concludes that the substantive content of good faith and fair dealing notion applied in Lithuanian commercial contract law should be specified taking into regard the peculiarities of business relations. What is more, the question, whether a businessman acted in good faith, should be answered with respect to common business practice of particular trade. The case law of Lithuania also recognizes the peculiarities of commercial good faith and fair dealing notion. What is more, when determining if a businessman acted in good faith, courts also mention common commercial practice. However, it is doubted that courts really take this criteria into account and it can be guessed that often the application of this standard is limited only to mentioning. Due to application of common business practice criteria the content of good faith and fair dealing principle is even harder to unfold, especially, as it can be very difficult to prove the existence of such practice. Yet this is the problem not only of the court, but also the parties of the civil dispute, as the presentation of reasonable arguments and proofs is their right and obligation. Research limitations/implications – the research has been limited to the analysis of commercial good faith and fair dealing doctrine in Lithuanian contract law, UNIDROIT Principles of International Commercial Contracts and Draft Common Frame of Reference. Practical implications – the findings of the research can be applied by judges invoking good faith and fair dealing doctrine in commercial disputes, as well, by businessman determining the limits of their

  6. Faith-Learning Integration, Critical Thinking Skills, and Student Development in Christian Education

    Science.gov (United States)

    Bailey, Karl G. D.

    2012-01-01

    Although the integration of faith and learning presupposes a learner, little theoretical work has addressed the role of students in faith-learning integration. Moreover, many students perceive faith-learning integration to be the work of teachers and institutions, suggesting that for learners, integration is a passive experience. This theoretical…

  7. Best waveform score for diagnosing keratoconus

    Directory of Open Access Journals (Sweden)

    Allan Luz

    2013-12-01

    Full Text Available PURPOSE: To test whether corneal hysteresis (CH and corneal resistance factor (CRF can discriminate between keratoconus and normal eyes and to evaluate whether the averages of two consecutive measurements perform differently from the one with the best waveform score (WS for diagnosing keratoconus. METHODS: ORA measurements for one eye per individual were selected randomly from 53 normal patients and from 27 patients with keratoconus. Two groups were considered the average (CH-Avg, CRF-Avg and best waveform score (CH-WS, CRF-WS groups. The Mann-Whitney U-test was used to evaluate whether the variables had similar distributions in the Normal and Keratoconus groups. Receiver operating characteristics (ROC curves were calculated for each parameter to assess the efficacy for diagnosing keratoconus and the same obtained for each variable were compared pairwise using the Hanley-McNeil test. RESULTS: The CH-Avg, CRF-Avg, CH-WS and CRF-WS differed significantly between the normal and keratoconus groups (p<0.001. The areas under the ROC curve (AUROC for CH-Avg, CRF-Avg, CH-WS, and CRF-WS were 0.824, 0.873, 0.891, and 0.931, respectively. CH-WS and CRF-WS had significantly better AUROCs than CH-Avg and CRF-Avg, respectively (p=0.001 and 0.002. CONCLUSION: The analysis of the biomechanical properties of the cornea through the ORA method has proved to be an important aid in the diagnosis of keratoconus, regardless of the method used. The best waveform score (WS measurements were superior to the average of consecutive ORA measurements for diagnosing keratoconus.

  8. Preconditioning Strategies in Elastic Full Waveform Inversion.

    Science.gov (United States)

    Matharu, G.; Sacchi, M. D.

    2016-12-01

    Elastic full waveform inversion (FWI) is inherently more non-linear than its acoustic counterpart, a property that stems from the increased model space of the problem. Whereas acoustic media can be parametrized by density and P-wave velocity, visco-elastic media are parametrized by density, attenuation and 21 independent coefficients of the elastic tensor. Imposing assumptions of isotropy and perfect elasticity to simplify the physics, reduces the number of independent parameters required to characterize a medium. Isotropic, elastic media can be parametrized in terms of density and the Lamé parameters. The different parameters can exhibit trade-off that manifest as attributes in the data. In the context of FWI, this means that certain parameters cannot be uniquely resolved. An ideal model update in full waveform inversion is equivalent to a Newton step. Explicit computation of the Hessian and its inverse is not computationally feasible in elastic FWI. The inverse Hessian scales the gradients to account for trade-off between parameters as well as compensating for inadequate illumination related to source-receiver coverage. Gradient preconditioners can be applied to mimic the action of the inverse Hessian and partially correct for inaccuracies in the gradient. In this study, we investigate the effects of model reparametrization by recasting a regularized form of the least-squares waveform misfit into a preconditioned formulation. New model parameters are obtained by applying invertible weighting matrices to the model vector. The weighting matrices are related to estimates of the prior model covariance matrix and incorporate information about spatially variant correlations of model parameters as well as correlations between independent parameters. We compare the convergence of conventional FWI to FWI after model reparametrization.

  9. Optimal Transport for Seismic Full Waveform Inversion

    CERN Document Server

    Engquist, Bjorn; Yang, Yunan

    2016-01-01

    Full waveform inversion is a successful procedure for determining properties of the earth from surface measurements in seismology. This inverse problem is solved by a PDE constrained optimization where unknown coefficients in a computed wavefield are adjusted to minimize the mismatch with the measured data. We propose using the Wasserstein metric, which is related to optimal transport, for measuring this mismatch. Several advantageous properties are proved with regards to convexity of the objective function and robustness with respect to noise. The Wasserstein metric is computed by solving a Monge-Ampere equation. We describe an algorithm for computing its Frechet gradient for use in the optimization. Numerical examples are given.

  10. A new earthquake location method based on the waveform inversion

    CERN Document Server

    Wu, Hao; Huang, Xueyuan; Yang, Dinghui

    2016-01-01

    In this paper, a new earthquake location method based on the waveform inversion is proposed. As is known to all, the waveform misfit function is very sensitive to the phase shift between the synthetic waveform signal and the real waveform signal. Thus, the convergence domain of the conventional waveform based earthquake location methods is very small. In present study, by introducing and solving a simple sub-optimization problem, we greatly expand the convergence domain of the waveform based earthquake location method. According to a large number of numerical experiments, the new method expands the range of convergence by several tens of times. This allows us to locate the earthquake accurately even from some relatively bad initial values.

  11. Multi-waveform classification for seismic facies analysis

    Science.gov (United States)

    Song, Chengyun; Liu, Zhining; Wang, Yaojun; Li, Xingming; Hu, Guangmin

    2017-04-01

    Seismic facies analysis provides an effective way to delineate the heterogeneity and compartments within a reservoir. Traditional method is using the single waveform to classify the seismic facies, which does not consider the stratigraphy continuity, and the final facies map may affect by noise. Therefore, by defining waveforms in a 3D window as multi-waveform, we developed a new seismic facies analysis algorithm represented as multi-waveform classification (MWFC) that combines the multilinear subspace learning with self-organizing map (SOM) clustering techniques. In addition, we utilize multi-window dip search algorithm to extract multi-waveform, which reduce the uncertainty of facies maps in the boundaries. Testing the proposed method on synthetic data with different S/N, we confirm that our MWFC approach is more robust to noise than the conventional waveform classification (WFC) method. The real seismic data application on F3 block in Netherlands proves our approach is an effective tool for seismic facies analysis.

  12. Waveform Optimization for SWIPT with Nonlinear Energy Harvester Modeling

    OpenAIRE

    Clerckx, Bruno

    2016-01-01

    Simultaneous Wireless Information and Power Transfer (SWIPT) has attracted significant attention in the communication community. The problem of waveform design for SWIPT has however never been addressed so far. In this paper, a novel SWIPT transceiver architecture is introduced relying on the superposition of multisine and OFDM waveforms at the transmitter and a power-splitter receiver equipped with an energy harvester and an information decoder capable of cancelling the multisine waveforms. ...

  13. RF arbitrary waveform generation using tunable planar lightwave circuits

    Science.gov (United States)

    Samadi, P.; Chen, L. R.; Callender, C.; Dumais, P.; Jacob, S.; Celo, D.

    2011-07-01

    We demonstrate photonically-assisted generation of RF arbitrary waveforms using planar lightwave circuits (PLCs) fabricated on silica-on-silicon. We exploit thermo-optic effects in silica in order to tune the response of the PLC and hence reconfigure the generated waveform. We demonstrate the generation of pulse trains at 40 GHz and 80 GHz with flat-top, Gaussian, and apodized profiles. These results demonstrate the potential for RF arbitrary waveform generation using chip-scale photonic solutions.

  14. Information Encoding on a Pseudo Random Noise Radar Waveform

    Science.gov (United States)

    2013-03-01

    PSEUDO RANDOM NOISE RADAR WAVEFORM THESIS Joshua A. Hardin, Captain, USAF AFIT-ENG-13-M-22 DEPARTMENT OF THE AIR FORCE AIR...protection in the United States. AFIT-ENG-13-M-22 INFORMATION ENCODING ON A PSEUDO RANDOM NOISE RADAR WAVEFORM THESIS Presented to the Faculty...INFORMATION ENCODING ON A PSEUDO RANDOM NOISE RADAR WAVEFORM I. Introduction 1.1 Problem Description Navigation requires knowledge of current

  15. On the accuracy and precision of numerical waveforms: effect of waveform extraction methodology

    Science.gov (United States)

    Chu, Tony; Fong, Heather; Kumar, Prayush; Pfeiffer, Harald P.; Boyle, Michael; Hemberger, Daniel A.; Kidder, Lawrence E.; Scheel, Mark A.; Szilagyi, Bela

    2016-08-01

    We present a new set of 95 numerical relativity simulations of non-precessing binary black holes (BBHs). The simulations sample comprehensively both black-hole spins up to spin magnitude of 0.9, and cover mass ratios 1-3. The simulations cover on average 24 inspiral orbits, plus merger and ringdown, with low initial orbital eccentricities e\\lt {10}-4. A subset of the simulations extends the coverage of non-spinning BBHs up to mass ratio q = 10. Gravitational waveforms at asymptotic infinity are computed with two independent techniques: extrapolation and Cauchy characteristic extraction. An error analysis based on noise-weighted inner products is performed. We find that numerical truncation error, error due to gravitational wave extraction, and errors due to the Fourier transformation of signals with finite length of the numerical waveforms are of similar magnitude, with gravitational wave extraction errors dominating at noise-weighted mismatches of ˜ 3× {10}-4. This set of waveforms will serve to validate and improve aligned-spin waveform models for gravitational wave science.

  16. Focal waveforms for various source waveforms driving a prolate-spheroidal impulse radiating antenna (IRA)

    Science.gov (United States)

    Altunc, Serhat; Baum, Carl E.; Christodoulou, Christos G.; Schamiloglu, Edl; Buchenauer, C. Jerald

    2008-08-01

    Impulse radiating antennas (IRAs) are designed to radiate very fast pulses in a narrow beam with low dispersion and high field amplitude. For this reason they have been used in a variety of applications. IRAs have been developed for use in the transient far-field region using parabolic reflectors. However, in this paper we focus in the near field region and develop the field waveform at the second focus of a prolate-spheroidal IRA. Certain skin cancers can be killed by the application of a high-amplitude electric field pulse. This can be accomplished by either inserting electrodes near the skin cancer or by applying fast, high-electric field pulses without direct contact. We investigate a new manifestation of an IRA, in which we use a prolate spheroid as a reflector instead of a parabolic reflector and focus in the near-field region instead of the far-field region. This technique minimizes skin damage associated with inserting electrodes near the tumor. Analytical and experimental behaviors for the focal waveforms of two and four-feed arm prolate-spheroidal IRAs are explored. With appropriate choice of the driving waveform we maximize the impulse field at the second focus. The focal waveform of a prolate-spheroidal IRA has been explained theoretically and verified experimentally.

  17. Waveform interative techniques for device transient simulation on parallel machines

    Energy Technology Data Exchange (ETDEWEB)

    Lumsdaine, A. [Univ. of Notre Dame, IN (United States); Reichelt, M.W. [Massachusetts Institute of Technology, Cambridge, MA (United States)

    1993-12-31

    In this paper we describe our experiences with parallel implementations of several different waveform algorithms for performing transient simulation of semiconductor devices. Because of their inherent computation and communication structure, waveform methods are well suited to MIMD-type parallel machines having a high communication latency - such as a cluster of workstations. Experimental results using pWORDS, a parallel waveform-based device transient simulation program, in conjunction with PVM running on a cluster of eight workstations demonstrate that parallel waveform techniques are an efficient and faster alternative to standard simulation algorithms.

  18. Adaptive Robust Waveform Selection for Unknown Target Detection in Clutter

    Institute of Scientific and Technical Information of China (English)

    Lu-Lu Wang; Hong-Qiang Wang; Yu-Liang Qin; Yong-Qiang Cheng

    2014-01-01

    @@@A basic assumption of most recently proposed waveform design algorithms is that the target impulse response is a known deterministic function or a stochastic process with a known power spectral density (PSD). However, it is well-known that a target impulse response is neither easily nor accurately obtained; besides it changes sharply with attitude angles. Both of the aforementioned cases complicate the waveform design process. In this paper, an adaptive robust waveform selection method for unknown target detection in clutter is proposed. The target impulse response is considered to be unknown but belongs to a known uncertainty set. An adaptive waveform library is devised by using a signal-to-clutter-plus-noise ratio (SCNR)- based optimal waveform design method. By applying the minimax robust waveform selection method, the optimal robust waveform is selected to ensure the lowest performance bound of the unknown target detection in clutter. Results show that the adaptive waveform library outperforms the predefined linear frequency modulation (LFM) waveform library on the SCNR bound.

  19. Designing waveforms for temporal encoding using a frequency sampling method

    DEFF Research Database (Denmark)

    Gran, Fredrik; Jensen, Jørgen Arendt

    2007-01-01

    , the amplitude spectrum of the transmitted waveform can be optimized, such that most of the energy is transmitted where the transducer has large amplification. To test the design method, a waveform was designed for a BK8804 linear array transducer. The resulting nonlinear frequency modulated waveform...... for the linear frequency modulated signal) were tested for both waveforms in simulation with respect to the Doppler frequency shift occurring when probing moving objects. It was concluded that the Doppler effect of moving targets does not significantly degrade the filtered output. Finally, in vivo measurements...

  20. Advances in waveform-agile sensing for tracking

    CERN Document Server

    Sira, Sandeep Prasad

    2009-01-01

    Recent advances in sensor technology and information processing afford a new flexibility in the design of waveforms for agile sensing. Sensors are now developed with the ability to dynamically choose their transmit or receive waveforms in order to optimize an objective cost function. This has exposed a new paradigm of significant performance improvements in active sensing: dynamic waveform adaptation to environment conditions, target structures, or information features. The manuscript provides a review of recent advances in waveform-agile sensing for target tracking applications. A dynamic wav

  1. Waveform Freezing of Sonic Booms Revisited

    Science.gov (United States)

    Cleveland, Robin O.; Blackstock, David T.

    1996-01-01

    Nonlinear distortion of sonic booms propagating in the atmosphere is strongly affected by stratification and geometrical spreading. For a downward propagating sonic boom in a standard atmosphere, stratification and spreading cause a slowing down of nonlinear distortion. In certain cases a stage is reached where no further distortion takes place. When this happens, the waveform is said to be frozen. In previous work the authors argued that for most HSCT designs and flight conditions being considered, the sonic boom is not frozen when it reaches the ground. The criterion used was the value of the distortion distance x bar is a measure of the nonlinear distortion suffered by the wave (and is closely related to Hayes's E variable). The aircraft must be at an altitude greater than 27 km (80,000 ft) for x bar at the groun be within 95% of its asymptotic value. However, work reported here demonstrates that the ground waveform is much closer to the frozen state than indicated by the previous analysis. In the new analysis, duration of the sonic boom is used as the criterion for judging closeness of approach tz frozen state. In order for the duration of the sonic boom at the ground to be within 95% of its frozen value, the flight altitude of the aircraft needs to be only 15 km (45,000 ft).

  2. Elastic reflection waveform inversion with variable density

    KAUST Repository

    Li, Yuanyuan

    2017-08-17

    Elastic full waveform inversion (FWI) provides a better description of the subsurface than those given by the acoustic assumption. However it suffers from a more serious cycle skipping problem compared with the latter. Reflection waveform inversion (RWI) provides a method to build a good background model, which can serve as an initial model for elastic FWI. Therefore, we introduce the concept of RWI for elastic media, and propose elastic RWI with variable density. We apply Born modeling to generate the synthetic reflection data by using optimized perturbations of P- and S-wave velocities and density. The inversion for the perturbations in P- and S-wave velocities and density is similar to elastic least-squares reverse time migration (LSRTM). An incorrect initial model will lead to some misfits at the far offsets of reflections; thus, can be utilized to update the background velocity. We optimize the perturbation and background models in a nested approach. Numerical tests on the Marmousi model demonstrate that our method is able to build reasonably good background models for elastic FWI with absence of low frequencies, and it can deal with the variable density, which is needed in real cases.

  3. Shared Use of Physical Activity Facilities Among North Carolina Faith Communities, 2013.

    Science.gov (United States)

    Hardison-Moody, Annie; Edwards, Michael B; Bocarro, Jason N; Stein, Anna; Kanters, Michael A; Sherman, Danielle Marie; Rhew, Lori K; Stallings, Willona Marie; Bowen, Sarah K

    2017-02-02

    Shared use of recreational facilities is a promising strategy for increasing access to places for physical activity. Little is known about shared use in faith-based settings. This study examined shared use practices and barriers in faith communities in North Carolina. Faith communities in North Carolina (n = 234) completed an online survey (October-December 2013) designed to provide information about the extent and nature of shared use of recreational facilities. We used binary logistic regression to examine differences between congregations that shared use and those that did not share use. Most of the faith communities (82.9%) that completed the survey indicated that they share their facilities with outside individuals and organizations. Formal agreements were more common when faith communities shared indoor spaces such as gymnasiums and classroom meeting spaces than when they shared outdoor spaces such as playgrounds or athletic fields. Faith communities in the wealthiest counties were more likely to share their spaces than were faith communities in poorer counties. Faith communities in counties with the best health rankings were more likely to share facilities than faith communities in counties that had lower health rankings. The most frequently cited reasons faith communities did not share their facilities were that they did not know how to initiate the process of sharing their facilities or that no outside groups had ever asked. Most faith communities shared their facilities for physical activity. Research is needed on the relationship between shared use and physical activity levels, including the effect of formalizing shared-use policies.

  4. Partnership among a faith-based organization and community.

    Science.gov (United States)

    Aponte, Judith; Cruz, Henry; Arce, Samuel; Durso, Rev Michael

    2013-01-01

    In a collaborative effort, a community-based participatory research approach was used to address the holistic health needs of a community while including a multilanguage view, a faith-based organization, The Legacy Center Community Development Corporation, and several health agencies partnered in organizing and conducting a health fair in West Central Queens. Health awareness and health promotion activities were provided through presentations, health screenings, and education materials (on diabetes, hypertension, nutrition, cholesterol, and heart disease). To meet the needs of community and/or faith-based organization members, translation services were available: nurses translated for non-English-speaking participants in Spanish, Mandarin, or Cantonese, and sign language interpreters used American Sign Language to translate for deaf participants.

  5. Moving Toward a Virtual Knowledge Platform for Faith Community Nurses.

    Science.gov (United States)

    Ziebarth, Deborah; Hunter, Carson

    2016-11-01

    In preparation for the development of a virtual knowledge platform for faith community nurses, a review of literature explored the prevalence and context of electronic knowledge management initiatives. The review revealed that healthcare, business, and global virtual knowledge platforms have been developed to elicit certain behaviors in users. For those who develop virtual knowledge platforms, the results are improved efficiency, innovation, accessibility, and cost savings. The main component of virtual knowledge platforms is a central repository or an infrastructure where knowledge is created, acquired, stored (documents), updated, and shared internally and externally. The refinery processes refer to technology mechanisms that make content accessible. A transparent collaboration among information technology, knowledge owners, and users is needed to successfully sustain a virtual knowledge platform. Faith community nurses often practice in isolated environments. A virtual knowledge platform where practice resources and tools are shared, and communication among peers exists, may improve knowledge and skills and result in a positive impact on patient outcomes.

  6. FAITH: Scanning of Rich Web Applications for Parameter Tampering Vulnerabilities

    CERN Document Server

    Fung, Adonis P H; Wong, T Y

    2012-01-01

    Modern HTML forms are designed to generate form controls dynamically and submit over AJAX as a result of recent advances in Javascript programming techniques. Existing scanners are constrained by interacting only with traditional forms, and vulnerabilities are often left undetected even after scrutiny. In this paper, we overcome a number of client-side challenges that used to make automated fuzzing of form submissions difficult and unfaithful. We build FAITH, a pragmatic scanner for uncovering parameter tampering vulnerabilities in real-world rich web applications. It is the first scanner that enables fuzzing in most kinds of form submissions while faithfully preserving the required user actions, HTML 5, AJAX, anti-CSRF tokens and dynamic form updates. The importance of this work is demonstrated by the severe vulnerabilities uncovered, including a way to bypass the most-trusted One-Time Password (OTP) in one of the largest multinational banks. These vulnerabilities cannot be detected by existing scanners.

  7. On the n-symplectic structure of faithful irreducible representations

    Science.gov (United States)

    Norris, L. K.

    2017-04-01

    Each faithful irreducible representation of an N-dimensional vector space V1 on an n-dimensional vector space V2 is shown to define a unique irreducible n-symplectic structure on the product manifold V1×V2 . The basic details of the associated Poisson algebra are developed for the special case N = n2, and 2n-dimensional symplectic submanifolds are shown to exist.

  8. Amenable, transitive and faithful actions of groups acting on trees

    CERN Document Server

    Fima, Pierre

    2012-01-01

    We study under which condition an amalgamated free product or an HNN-extension over a finite subgroup admits an amenable, transitive and faithful action on an infinite countable set. We show that such an action exists if the initial groups admit an amenable and almost free action with infinite orbits (e.g. virtually free groups or infinite amenable groups). Our result relies on the Baire category Theorem. We extend the result to groups acting on trees.

  9. The relation of collapsibility and confounding to faithfulness and stability.

    Science.gov (United States)

    Mansournia, Mohammad Ali; Greenland, Sander

    2015-07-01

    A probability distribution may have some properties that are stable under a structure (e.g., a causal graph) and other properties that are unstable. Stable properties are implied by the structure and thus will be shared by populations following the structure. In contrast, unstable properties correspond to special circumstances that are unlikely to be replicated across those populations. A probability distribution is faithful to the structure if all independencies in the distribution are logical consequences of the structure. We explore the distinction between confounding and noncollapsibility in relation to the concepts of faithfulness and stability. Simple collapsibility of an odds ratio over a risk factor is unstable and thus unlikely if the exposure affects the outcome, whether or not the risk factor is associated with exposure. For a binary exposure with no effect, collapsibility over a confounder also requires unfaithfulness. Nonetheless, if present, simple collapsibility of the odds ratio limits the degree of confounding by the covariate. Collapsibility of effect measures is stable if the covariate is independent of the outcome given exposure, but it is unstable if the covariate is an instrumental variable. Understanding stable and unstable properties of distributions under causal structures, and the distinction between stability and faithfulness, yields important insights into the correspondence between noncollapsibility and confounding.

  10. Faith and End of Life in Nursing Homes

    Directory of Open Access Journals (Sweden)

    Robert L. Rubinstein

    2011-01-01

    Full Text Available This paper explores the role of religious belief in the experiences of dying and death in a Catholic nursing home. The home appeals to residents and their families due to the active religious presence. Thus, religion is a salient element of the “local culture” which exists in this long-term care setting. The preeminence of faith within the organization and the personal religious convictions of staff, residents, and families may drive how death and dying are discussed and experienced in this setting, as well as the meanings that are attached to them. This paper examines the relationship between faith and the experience and meaning of death in this nursing home. We present themes that emerged from open-ended interviews with residents, family members, and staff, gathered between 1996 and 2004. The data indicate that people select the home due to their Catholic faith and the home's religious tone. Themes also show that belief in God and an afterlife helps shape the experience of dying and death for our informants. Our paper does not compare ease of dying with other nursing homes or within other belief systems.

  11. ADVANCED WAVEFORM SIMULATION FOR SEISMIC MONITORING EVENTS

    Energy Technology Data Exchange (ETDEWEB)

    Helmberger, D; Tromp, J; Rodgers, A

    2007-07-16

    Comprehensive test ban monitoring in terms of location and discrimination has progressed significantly in recent years. However, the characterization of sources and the estimation of low yields remains a particular challenge. As the recent Korean shot demonstrated, we can probably expect to have a small set of teleseismic, far-regional and high-frequency regional data to analyze in estimating the yield of an event. Since stacking helps to bring signals out of the noise, it becomes useful to conduct comparable analyses on neighboring events, earthquakes in this case. If these auxiliary events have accurate moments and source descriptions, we have a means of directly comparing effective source strengths. Although we will rely on modeling codes, 1D, 2D, and 3D, we will also apply a broadband calibration procedure to use longer periods (P>5s) waveform data to calibrate short-period (P between .5 to 2 Hz) and high-frequency (P between 2 to 10 Hz) as path specify station corrections from well-known regional sources. We have expanded our basic Cut-and-Paste (CAP) methodology to include not only timing shifts but also amplitude (f) corrections at recording sites. The name of this method was derived from source inversions that allow timing shifts between 'waveform segments' (or cutting the seismogram up and re-assembling) to correct for crustal variation. For convenience, we will refer to these f-dependent refinements as CAP+ for (SP) and CAP++ for still higher frequency. These methods allow the retrieval of source parameters using only P-waveforms where radiation patterns are obvious as demonstrated in this report and are well suited for explosion P-wave data. The method is easily extended to all distances because it uses Green's function although there may be some changes required in t* to adjust for offsets between local vs. teleseismic distances. In short, we use a mixture of model-dependent and empirical corrections to tackle the path effects. Although

  12. Towards Full-Waveform Ambient Noise Inversion

    Science.gov (United States)

    Sager, Korbinian; Ermert, Laura; Afanasiev, Michael; Boehm, Christian; Fichtner, Andreas

    2017-04-01

    Noise tomography usually works under the assumption that the inter-station ambient noise correlation is equal to a scaled version of the Green function between the two receivers. This assumption, however, is only met under specific conditions, e.g. wavefield diffusivity and equipartitioning, or the isotropic distribution of both mono- and dipolar uncorrelated noise sources. These assumptions are typically not satisfied in the Earth. This inconsistency inhibits the exploitation of the full waveform information contained in noise correlations in order to constrain Earth structure and noise generation. To overcome this limitation, we attempt to develop a method that consistently accounts for the distribution of noise sources, 3D heterogeneous Earth structure and the full seismic wave propagation physics. This is intended to improve the resolution of tomographic images, to refine noise source distribution, and thereby to contribute to a better understanding of both Earth structure and noise generation. First, we develop an inversion strategy based on a 2D finite-difference code using adjoint techniques. To enable a joint inversion for noise sources and Earth structure, we investigate the following aspects: i) the capability of different misfit functionals to image wave speed anomalies and source distribution and ii) possible source-structure trade-offs, especially to what extent unresolvable structure can be mapped into the inverted noise source distribution and vice versa. In anticipation of real-data applications, we present an extension of the open-source waveform modelling and inversion package Salvus (http://salvus.io). It allows us to compute correlation functions in 3D media with heterogeneous noise sources at the surface and the corresponding sensitivity kernels for the distribution of noise sources and Earth structure. By studying the effect of noise sources on correlation functions in 3D, we validate the aforementioned inversion strategy and prepare the

  13. Faith Moves Mountains-Mountains Move Faith: Two Opposite Epidemiological Forces in Research on Religion and Health.

    Science.gov (United States)

    Hvidt, N C; Hvidtjørn, D; Christensen, K; Nielsen, J B; Søndergaard, J

    2017-02-01

    Research suggests opposite epidemiological forces in religion and health: (1). Faith seems to move mountains in the sense that religion is associated with positive health outcomes. (2). Mountains of bad health seem to move faith. We reflected on these forces in a population of 3000 young Danish twins in which all religiosity measures were associated with severe disease. We believe the reason for this novel finding is that the sample presents as a particularly secular population-based study and that the second epidemiological force has gained the upper hand in this sample. We suggest that all cross-sectional research on religion and health should be interpreted in light of such opposite epidemiological forces potentially diluting each other.

  14. Faith Is Confidence: The Implication of Psychosocial Components in Faith-Based Educational Programs on Expressive Communication Skills of Adult Learners

    Science.gov (United States)

    Lynch, Erin M.

    2016-01-01

    Faith-based programs for adult learners have environmental factors that differentiate them from non-faith based programs, but explicit empirical studies evaluating the impact of the psychosocial factors have been lacking in the literature. This study comparatively examines the achievement level of expressive communication skills as measured…

  15. Tera-sample-per-second Real-time Waveform Digitizer

    CERN Document Server

    Han, Y; Jalali, B; Han, Yan; Boyraz, Ozdal; Jalali, Bahram

    2005-01-01

    We demonstrate a real-time transient waveform digitizer with a record 1 TSa/s (Tera-Sample/sec) sampling rate. This is accomplished by using a photonic time stretch preprocessor which slows down the electrical waveform before it is captured by an electronic digitizer.

  16. An Overview of Radar Waveform Optimization for Target Detection

    Directory of Open Access Journals (Sweden)

    Wang Lulu

    2016-10-01

    Full Text Available An optimal waveform design method that fully employs the knowledge of the target and the environment can further improve target detection performance, thus is of vital importance to research. In this paper, methods of radar waveform optimization for target detection are reviewed and summarized and provide the basis for the research.

  17. Automated multimode inversion of surface and S waveforms

    NARCIS (Netherlands)

    Lebedev, Sergei; Nolet, Guust; Meier, Thomas; Hilst, R.D. van der

    2005-01-01

    Inversion of the surface, S, and multiple-S waveforms is an effective means of constraining the structure of the upper mantle, including the transition zone. Exploiting the resolving power of the enormous volume of presently available data requires efficiency of data processing and waveform modellin

  18. Analysis of a Proposed Two-Frequency Radar Waveform

    Science.gov (United States)

    1974-11-01

    Rice and Dugundji . The waveform at the Input of the detector is u(t) -§ cn cos (UM: + f^) (1) A frequency q called the "midband frequency"is selected...Analysis of Random Noise," Bell Systi Technical Journal. Vol 23, p 81, 1944. 11. J. Dugundji , "Bivelopes and Pre-Envelopes of Real Waveforms," IRE

  19. Method and apparatus for resonant frequency waveform modulation

    Science.gov (United States)

    Taubman, Matthew S [Richland, WA

    2011-06-07

    A resonant modulator device and process are described that provide enhanced resonant frequency waveforms to electrical devices including, e.g., laser devices. Faster, larger, and more complex modulation waveforms are obtained than can be obtained by use of conventional current controllers alone.

  20. Waveform Selectivity at the Same Frequency

    CERN Document Server

    Wakatsuchi, Hiroki; Rushton, Jeremiah J; Gao, Fei; Kim, Sanghoon; Sievenpiper, Daniel F

    2014-01-01

    Electromagnetic properties depend on the composition of materials, i.e. either angstrom scales of molecules or, for metamaterials, subwavelength periodic structures. Each material behaves differently in accordance with the frequency of an incoming electromagnetic wave due to the frequency dispersion or the resonance of the periodic structures. This indicates that if the frequency is fixed, the material always responds in the same manner unless it has nonlinearity. However, such nonlinearity is controlled by the magnitude of the incoming wave or other bias. Therefore, it is difficult to distinguish different incoming waves at the same frequency. Here we present a new concept of circuit-based metasurfaces to selectively absorb or transmit specific types of waveforms even at the same frequency. The metasurfaces, integrated with schottky diodes as well as either capacitors or inductors, selectively absorb short or long pulses, respectively. The two types of the circuit elements are then combined to absorb or tran...

  1. Heartrate variation of umbilical artery Doppler waveforms.

    Science.gov (United States)

    Hoskins, P R; Johnstone, F D; Chambers, S E; Haddad, N G; White, G; McDicken, W N

    1989-01-01

    Umbilical artery Doppler waveforms from 20 patients were used to investigate the dependence of resistance index and pulsatility index on beat to beat pulse length over short time periods for individual patients, and on the usefulness of a common normalisation formula. For individual patients the resistance index and pulsatility index were only partially correlated with pulse length. Changes in both indices occurred independently of pulse length. Use of a common normalisation formula resulted in no significant reduction of the coefficient of variation of the resistance index (p greater than 0.1), and a reduction in the coefficient of variation of the pulsatility index of 10% (p greater than 0.001). It is concluded that short term changes in resistance index and pulsatility index cannot be corrected by a common normalisation formula.

  2. Direct Waveform Inversion by Iterative Inverse Propagation

    CERN Document Server

    Schlottmann, R B

    2009-01-01

    Seismic waves are the most sensitive probe of the Earth's interior we have. With the dense data sets available in exploration, images of subsurface structures can be obtained through processes such as migration. Unfortunately, relating these surface recordings to actual Earth properties is non-trivial. Tomographic techniques use only a small amount of the information contained in the full seismogram and result in relatively low resolution images. Other methods use a larger amount of the seismogram but are based on either linearization of the problem, an expensive statistical search over a limited range of models, or both. We present the development of a new approach to full waveform inversion, i.e., inversion which uses the complete seismogram. This new method, which falls under the general category of inverse scattering, is based on a highly non-linear Fredholm integral equation relating the Earth structure to itself and to the recorded seismograms. An iterative solution to this equation is proposed. The res...

  3. Facies Constrained Elastic Full Waveform Inversion

    KAUST Repository

    Zhang, Z.

    2017-05-26

    Current efforts to utilize full waveform inversion (FWI) as a tool beyond acoustic imaging applications, for example for reservoir analysis, face inherent limitations on resolution and also on the potential trade-off between elastic model parameters. Adding rock physics constraints does help to mitigate these issues. However, current approaches to add such constraints are based on averaged type rock physics regularization terms. Since the true earth model consists of different facies, averaging over those facies naturally leads to smoothed models. To overcome this, we propose a novel way to utilize facies based constraints in elastic FWI. A so-called confidence map is calculated and updated at each iteration of the inversion using both the inverted models and the prior information. The numerical example shows that the proposed method can reduce the cross-talks and also can improve the resolution of inverted elastic properties.

  4. Waveform Synthesizer For Imaging And Ranging Applications

    Science.gov (United States)

    DUDLEY, PETER A.; [et al

    2004-11-30

    Frequency dependent corrections are provided for quadrature imbalance. An operational procedure filters imbalance effects without prior calibration or equalization. Waveform generation can be adjusted/corrected in a synthetic aperture radar system (SAR), where a rolling phase shift is applied to the SAR's QDWS signal where it is demodulated in a receiver; unwanted energies, such as imbalance energy, are separated from a desired signal in Doppler; the separated energy is filtered from the receiver leaving the desired signal; and the separated energy in the receiver is measured to determine the degree of imbalance that is represented by it. Calibration methods can also be implemented into synthesis. The degree of quadrature imbalance can be used to determine calibration values that can then be provided as compensation for frequency dependent errors in components, such as the QDWS and SSB mixer, affecting quadrature signal quality.

  5. Integrating Biosystem Models Using Waveform Relaxation

    Directory of Open Access Journals (Sweden)

    Stephen Baigent

    2008-12-01

    Full Text Available Modelling in systems biology often involves the integration of component models into larger composite models. How to do this systematically and efficiently is a significant challenge: coupling of components can be unidirectional or bidirectional, and of variable strengths. We adapt the waveform relaxation (WR method for parallel computation of ODEs as a general methodology for computing systems of linked submodels. Four test cases are presented: (i a cascade of unidirectionally and bidirectionally coupled harmonic oscillators, (ii deterministic and stochastic simulations of calcium oscillations, (iii single cell calcium oscillations showing complex behaviour such as periodic and chaotic bursting, and (iv a multicellular calcium model for a cell plate of hepatocytes. We conclude that WR provides a flexible means to deal with multitime-scale computation and model heterogeneity. Global solutions over time can be captured independently of the solution techniques for the individual components, which may be distributed in different computing environments.

  6. Synthetic tsunami waveform catalogs with kinematic constraints

    Science.gov (United States)

    Baptista, Maria Ana; Miranda, Jorge Miguel; Matias, Luis; Omira, Rachid

    2017-07-01

    In this study we present a comprehensive methodology to produce a synthetic tsunami waveform catalogue in the northeast Atlantic, east of the Azores islands. The method uses a synthetic earthquake catalogue compatible with plate kinematic constraints of the area. We use it to assess the tsunami hazard from the transcurrent boundary located between Iberia and the Azores, whose western part is known as the Gloria Fault. This study focuses only on earthquake-generated tsunamis. Moreover, we assume that the time and space distribution of the seismic events is known. To do this, we compute a synthetic earthquake catalogue including all fault parameters needed to characterize the seafloor deformation covering the time span of 20 000 years, which we consider long enough to ensure the representability of earthquake generation on this segment of the plate boundary. The computed time and space rupture distributions are made compatible with global kinematic plate models. We use the tsunami empirical Green's functions to efficiently compute the synthetic tsunami waveforms for the dataset of coastal locations, thus providing the basis for tsunami impact characterization. We present the results in the form of offshore wave heights for all coastal points in the dataset. Our results focus on the northeast Atlantic basin, showing that earthquake-induced tsunamis in the transcurrent segment of the Azores-Gibraltar plate boundary pose a minor threat to coastal areas north of Portugal and beyond the Strait of Gibraltar. However, in Morocco, the Azores, and the Madeira islands, we can expect wave heights between 0.6 and 0.8 m, leading to precautionary evacuation of coastal areas. The advantages of the method are its easy application to other regions and the low computation effort needed.

  7. Design of a 9-loop quasi-exponential waveform generator.

    Science.gov (United States)

    Banerjee, Partha; Shukla, Rohit; Shyam, Anurag

    2015-12-01

    We know in an under-damped L-C-R series circuit, current follows a damped sinusoidal waveform. But if a number of sinusoidal waveforms of decreasing time period, generated in an L-C-R circuit, be combined in first quarter cycle of time period, then a quasi-exponential nature of output current waveform can be achieved. In an L-C-R series circuit, quasi-exponential current waveform shows a rising current derivative and thereby finds many applications in pulsed power. Here, we have described design and experiment details of a 9-loop quasi-exponential waveform generator. In that, design details of magnetic switches have also been described. In the experiment, output current of 26 kA has been achieved. It has been shown that how well the experimentally obtained output current profile matches with the numerically computed output.

  8. On the accuracy and precision of numerical waveforms: Effect of waveform extraction methodology

    CERN Document Server

    Chu, Tony; Kumar, Prayush; Pfeiffer, Harald P; Boyle, Michael; Hemberger, Daniel A; Kidder, Lawrence E; Scheel, Mark A; Szilagyi, Bela

    2015-01-01

    We present a new set of 95 numerical relativity simulations of non-precessing binary black holes (BBHs). The simulations sample comprehensively both black-hole spins up to spin magnitude of 0.9, and cover mass ratios 1 to 3. The simulations cover on average 24 inspiral orbits, plus merger and ringdown, with low initial orbital eccentricities $e<10^{-4}$. A subset of the simulations extends the coverage of non-spinning BBHs up to mass ratio $q=10$. Gravitational waveforms at asymptotic infinity are computed with two independent techniques, extrapolation, and Cauchy characteristic extraction. An error analysis based on noise-weighted inner products is performed. We find that numerical truncation error, error due to gravitational wave extraction, and errors due to the finite length of the numerical waveforms are of similar magnitude, with gravitational wave extraction errors somewhat dominating at noise-weighted mismatches of $\\sim 3\\times 10^{-4}$. This set of waveforms will serve to validate and improve ali...

  9. Simulation of Full-Waveform Laser Altimeter Echowaveform

    Science.gov (United States)

    Lv, Y.; Tong, X. H.; Liu, S. J.; Xie, H.; Luan, K. F.; Liu, J.

    2016-06-01

    Change of globe surface height is an important factor to study human living environment. The Geoscience Laser Altimeter System (GLAS) on ICESat is the first laser-ranging instrument for continuous global observations of the Earth. In order to have a comprehensive understanding of full-waveform laser altimeter, this study simulated the operating mode of ICESat and modeled different terrains' (platform terrain, slope terrain, and artificial terrain) echo waveforms based on the radar equation. By changing the characteristics of the system and the targets, numerical echo waveforms can be achieved. Hereafter, we mainly discussed the factors affecting the amplitude and size (width) of the echoes. The experimental results implied that the slope of the terrain, backscattering coefficient and reflectivity, target height, target position in the footprint and area reacted with the pulse all can affect the energy distribution of the echo waveform and the receiving time. Finally, Gaussian decomposition is utilized to decompose the echo waveform. From the experiment, it can be noted that the factors which can affect the echo waveform and by this way we can know more about large footprint full-waveform satellite laser altimeter.

  10. Design and implementation of a hospital wide waveform capture system.

    Science.gov (United States)

    Blum, James M; Joo, Heyon; Lee, Henry; Saeed, Mohammed

    2015-06-01

    The use of telemetry and invasive monitoring is exceptionally common in modern healthcare. To date the vast majority of this information is not stored for more than a brief duration on the local monitor. This prohibits extensive investigation into waveform data. We describe a system to collect such data in a quaternary care facility. Using standardized "packet sniffing" technology along with routine manual documentation, we reverse engineered the Unity network protocol used to transmit waveform data across the University of Michigan mission critical monitor network. Data was subsequently captured using a proprietary piece of software writing waveform data to local disks. Nightly, this data is post-processed using data from the admit-discharge-transfer system into individual patient waveforms for the day regardless of location. Over a 10 month period, over 2,785 individual patients had a total of 65,112 waveforms captured 15,978 from the operating rooms and 49,134 from the ICUs. The average OR case collected over 11 MB of data. The average single day data collection consisted of 8.6 GB of data. Entire hospital waveform data collection is possible using internally developed software enabling research on waveform data with minimal technical burden. Further research is required to determine the long-term storage and processing of such data.

  11. Generation of correlated finite alphabet waveforms using gaussian random variables

    KAUST Repository

    Jardak, Seifallah

    2014-09-01

    Correlated waveforms have a number of applications in different fields, such as radar and communication. It is very easy to generate correlated waveforms using infinite alphabets, but for some of the applications, it is very challenging to use them in practice. Moreover, to generate infinite alphabet constant envelope correlated waveforms, the available research uses iterative algorithms, which are computationally very expensive. In this work, we propose simple novel methods to generate correlated waveforms using finite alphabet constant and non-constant-envelope symbols. To generate finite alphabet waveforms, the proposed method map the Gaussian random variables onto the phase-shift-keying, pulse-amplitude, and quadrature-amplitude modulation schemes. For such mapping, the probability-density-function of Gaussian random variables is divided into M regions, where M is the number of alphabets in the corresponding modulation scheme. By exploiting the mapping function, the relationship between the cross-correlation of Gaussian and finite alphabet symbols is derived. To generate equiprobable symbols, the area of each region is kept same. If the requirement is to have each symbol with its own unique probability, the proposed scheme allows us that as well. Although, the proposed scheme is general, the main focus of this paper is to generate finite alphabet waveforms for multiple-input multiple-output radar, where correlated waveforms are used to achieve desired beampatterns. © 2014 IEEE.

  12. Source-independent elastic waveform inversion using a logarithmic wavefield

    KAUST Repository

    Choi, Yun Seok

    2012-01-01

    The logarithmic waveform inversion has been widely developed and applied to some synthetic and real data. In most logarithmic waveform inversion algorithms, the subsurface velocities are updated along with the source estimation. To avoid estimating the source wavelet in the logarithmic waveform inversion, we developed a source-independent logarithmic waveform inversion algorithm. In this inversion algorithm, we first normalize the wavefields with the reference wavefield to remove the source wavelet, and then take the logarithm of the normalized wavefields. Based on the properties of the logarithm, we define three types of misfit functions using the following methods: combination of amplitude and phase, amplitude-only, and phase-only. In the inversion, the gradient is computed using the back-propagation formula without directly calculating the Jacobian matrix. We apply our algorithm to noise-free and noise-added synthetic data generated for the modified version of elastic Marmousi2 model, and compare the results with those of the source-estimation logarithmic waveform inversion. For the noise-free data, the source-independent algorithms yield velocity models close to true velocity models. For random-noise data, the source-estimation logarithmic waveform inversion yields better results than the source-independent method, whereas for coherent-noise data, the results are reversed. Numerical results show that the source-independent and source-estimation logarithmic waveform inversion methods have their own merits for random- and coherent-noise data. © 2011.

  13. Behavioral constraints and the evolution of faithful social learning

    Institute of Scientific and Technical Information of China (English)

    Alberto ACERBI; Pierre O. JACQUET; Claudio TENNIE

    2012-01-01

    Behavioral "traditions",i.e.behavioral patterns that are acquired with the aid of social learning and that are relatively stable in a group,have been observed in several species.Recently,however,it has been questioned whether non-human social learning is faithful enough to stabilize those patterns.The observed stability could be interpreted as a result of various constraints that limit the number of possible alternative behaviors,rather than of the fidelity of transmission mechanisms.Those constraints can be roughly described as "internal",such as mechanical (bodily) properties or cognitive limitations and predispositions,and "external",such as ecological availability or pressures.Here we present an evolutionary individual-based model that explores the relationships between the evolution of faithful social learning and behavioral constraints,represented both by the size of the behavioral repertoire and by the "shape" of the search space of a given task.We show that the evolution of high-fidelity transmission mechanisms,when associated with costs (e.g.cognitive,biomechanical,energetic,etc.),is only likely if the potential behavioral repertoire of a species is large and if the search space does not provide information that can be exploited by individual learning.Moreover we show how stable behavioral patterns ("traditions") can be achieved at the population level as an outcome of both high-fidelity and low-fidelity transmission mechanisms,given that the latter are coupled with a small behavioral repertoire or with a search space that provide substantial feedback.Finally,by introducing the possibility of environmental change,we show that intermediate rates of change favor the evolution of faithful social learning [Current Zoology 58 (2):307-318,2012].

  14. Buddhism, Poststructuralist Thought, Cultural Studies: A Profession of Faith

    Directory of Open Access Journals (Sweden)

    Edwin Ng

    2012-09-01

    Full Text Available This essay is a result of the author's research into Buddhism and poststructuralist theories on knowledge, self and ethics and attempts to articulate the ethico-political implications of his own practice of Vipassana (a form of Buddhist meditation and interrogate what is called the politics of spirituality. He explores the role of faith within cultural studies by first contextualising the relevant discursive fields, then  analysing Vipassana with a ‘religious’ Foucauldian approach oriented around the critico-political aims of Foucault's late work. This elucidates how Buddhist and poststructuralist thought share certain concerns, and identifies trajectories for further inquiry.

  15. From Quantum theory to Quantum theology: A leap of faith

    Directory of Open Access Journals (Sweden)

    M. M.J. Basson

    1997-01-01

    Full Text Available This article is aimed at introducing multi valued logic as an epistemic model for theological thought within the  reformational-dialectic paradigm. Nowadays, reformational-dialectic theology is challenged by postmodem culture, interreligious exposure and scientific discoveries, which subsequently lead to new and unaccounted world-views. As a result, an epistemological shift based on an expanded rationality is called for. It is in this regard that multivalued-logic emerges as an epistemic model specifically developed to accommodate diversity, uncertainty and probability as well as, to restore hope and faith in the hearts of millions.

  16. Mass-Fatality Incident Preparedness Among Faith-Based Organizations.

    Science.gov (United States)

    Zhi, Qi; Merrill, Jacqueline A; Gershon, Robyn R

    2017-07-04

    Introduction Members of faith-based organizations (FBOs) are in a unique position to provide support and services to their local communities during disasters. Because of their close community ties and well-established trust, they can play an especially critical role in helping communities heal in the aftermath of a mass-fatality incident (MFI). Faith-based organizations are considered an important disaster resource and partner under the National Response Plan (NRP) and National Response Framework; however, their level of preparedness and response capabilities with respect to MFIs has never been evaluated. The purpose of this study was threefold: (1) to develop appropriate measures of preparedness for this sector; (2) to assess MFI preparedness among United States FBOs; and (3) to identify key factors associated with MFI preparedness. Problem New metrics for MFI preparedness, comprised of three domains (organizational capabilities, operational capabilities, and resource sharing partnerships), were developed and tested in a national convenience sample of FBO members. Data were collected using an online anonymous survey that was distributed through two major, national faith-based associations and social media during a 6-week period in 2014. Descriptive, bivariate, and correlational analyses were conducted. One hundred twenty-four respondents completed the online survey. More than one-half of the FBOs had responded to MFIs in the previous five years. Only 20% of respondents thought that roughly three-quarters of FBO clergy would be able to respond to MFIs, with or without hazardous contamination. A higher proportion (45%) thought that most FBO clergy would be willing to respond, but only 37% thought they would be willing if hazardous contamination was involved. Almost all respondents reported that their FBO was capable of providing emotional care and grief counseling in response to MFIs. Resource sharing partnerships were typically in place with other voluntary

  17. Gandhi on religion, faith and conversion: secular blueprint relevant today.

    Science.gov (United States)

    Singh, Ajai R; Singh, Shakuntala A

    2004-01-01

    Gandhi believed in judging people of other faiths from their stand point rather than his own. He welcomed contact of Hinduism with other religions, especially the Christian doctrines, for he did not want to be debarred from assimilating good anywhere else. He believed a respectful study of other's religion was a sacred duty and it did not reduce reverence for one's own. He was looking out for those universal principles which transcended religion as a dogma. He expected religion to take account of practical life, he wanted it to appeal to reason and not be in conflict with morality. He believed it was his right and duty to point out the defects of his own religion, but to desist from doing so with other's faith. He refused to abuse a man for his fanatical deeds for he tried to see them from the other person's point of view. He believed Jesus expressed the will and spirit of God but could not accept Jesus as the only incarnate son of God. If Jesus was like God or God himself, then all men were like God or God Himself. But neither could he accept the Vedas as the inspired word of God, for if they were inspired why not also the Bible and the Koran? He believed all great religions were fundamentally equal and that there should be innate respect for them, not just mutual tolerance. He felt a person wanting to convert should try to be a good follower of his own faith rather than seek goodness in change of faith. His early impressions of Christianity were unfortunate which underwent a change when he discovered the New Testament and the Sermon on the Mount, whose ideal of renunciation appealed to him greatly. He thought Parliament of Religions or International Fellowship of Religions could be based only on equality of status, a common platform. An attitude of patronising tolerance was false to the spirit of international fellowship. He believed that all religions were more or less true, but had errors because they came to us though imperfect human instrumentality. Religious

  18. Framing the Role of the Faith Community in Global Health

    Directory of Open Access Journals (Sweden)

    Mark A. Strand

    2014-01-01

    Full Text Available Globalization has brought many people and organizations together. Healthcare is one of the fields that has been the most prominent in global collaboration. Healthcare professionals working from the framework of Christian faith have been participants and leaders in global health for many years. The current challenges in global health call for the active involvement of all concerned players, Christian healthcare professionals among them. In this paper, the authors suggest a unique framework for Christians involved in global health to make contributions to research, scholarship, and practice innovation in this field.

  19. Gandhi on Religion, Faith and Conversion: Secular Blueprint Relevant Today*

    Science.gov (United States)

    Singh, Ajai R.; Singh, Shakuntala A.

    2004-01-01

    Gandhi believed in judging people of other faiths from their stand point rather than his own. He welcomed contact of Hinduism with other religions, especially the Christian doctrines, for he did not want to be debarred from assimilating good anywhere else. He believed a respectful study of other's religion was a sacred duty and it did not reduce reverence for one's own. He was looking out for those universal principles which transcended religion as a dogma. He expected religion to take account of practical life, he wanted it to appeal to reason and not be in conflict with morality. He believed it was his right and duty to point out the defects of his own religion, but to desist from doing so with other's faith. He refused to abuse a man for his fanatical deeds for he tried to see them from the other person's point of view. He believed Jesus expressed the will and spirit of God but could not accept Jesus as the only incarnate son of God. If Jesus was like God or God himself, then all men were like God or God Himself. But neither could he accept the Vedas as the inspired word of God, for if they were inspired why not also the Bible and the Koran? He believed all great religions were fundamentally equal and that there should be innate respect for them, not just mutual tolerance. He felt a person wanting to convert should try to be a good follower of his own faith rather than seek goodness in change of faith. His early impressions of Christianity were unfortunate which underwent a change when he discovered the New Testament and the Sermon on the Mount, whose ideal of renunciation appealed to him greatly. He thought Parliament of Religions or International Fellowship of Religions could be based only on equality of status, a common platform. An attitude of patronising tolerance was false to the spirit of international fellowship. He believed that all religions were more or less true, but had errors because they came to us though imperfect human instrumentality. Religious

  20. Inclusion of people with mental retardation and other developmental disabilities in communities of faith.

    Science.gov (United States)

    Vogel, Jeannine; Polloway, Edward A; Smith, J David

    2006-04-01

    Our focus in this paper is on efforts to include persons with developmental disabilities in faith communities. We provide a review of the relevant literature on religious participation and faith communities for persons with disabilities and blend the limited data available on these topics with the perspectives of individuals whose efforts focus on these concerns. Topics explored are the implications of being part of the faith community in terms of its impact on quality of life, the barriers to inclusion in such communities, strategies for overcoming these barriers, and special considerations for adults with mental retardation or other developmental disabilities. Discussion of the implications for enhancing inclusion in faith communities is provided.

  1. Exploration and Description of Faith-Based Health Resources: Findings Inform Advancing Holistic Health Care.

    Science.gov (United States)

    Dyess, Susan MacLeod

    2015-01-01

    It is important to use all holistic resource opportunities in communities, such as integrative healing centers, and mind-body-spirit approaches to health. These holistic approaches may be realized through nontraditional avenues, such as faith-based resources. This article reports on an exploratory study that describes faith-based resources supporting holistic health in a southeastern region of the United States. A working definition for "faith-based health resources" was "ecumenical and interfaith community-based, open-access health resources that include in mission for service a reference to faith." Excluded from the definition were institutional services from hospitals, focused social services from area agencies, and federally funded services.

  2. Adaptive Prony method for waveform distortion detection in power systems

    Energy Technology Data Exchange (ETDEWEB)

    Bracale, A.; Carpinelli, G. [Electrical Engineering Department, University of Napoli, Via Claudio 21, 80125 Napoli (Italy); Caramia, P. [Industrial Engineering Department, University of Cassino (Italy)

    2007-06-15

    IEC Standards characterize the waveform distortions in power systems with the amplitudes of harmonic and interharmonic groupings (subgroups and groups) calculated by using the waveform spectral components obtained with a 5 Hz frequency resolution DFT. In some cases the power system waveforms are characterized by means of spectral signal components that the DFT with 5 Hz frequency resolution is unable to capture with sufficient accuracy. In this paper a new Prony method is proposed to calculate the harmonic and interharmonic subgroups. This method is based on an adaptive technique that acts with the aim of minimizing the mean square relative error of signal estimation. (author)

  3. Compressive full-waveform LIDAR with low-cost sensor

    Science.gov (United States)

    Yang, Weiyi; Ke, Jun

    2016-10-01

    Full-waveform LiDAR is a method that digitizes the complete waveform of backscattered pulses to obtain range information of multi-targets. To avoid expensive sensors in conventional full-waveform LiDAR system, a new system based on compressive sensing method is presented in this paper. The non-coherent continuous-wave laser is modulated by electro-optical modulator with pseudo-random sequences. A low-bandwidth detector and a low-bandwidth analog-digital converter are used to acquire the returned signal. OMP algorithm is employed to reconstruct the high resolution range information.

  4. General Dynamic (GD) Launch Waveform On-Orbit Performance Report

    Science.gov (United States)

    Briones, Janette C.; Shalkhauser, Mary Jo

    2014-01-01

    The purpose of this report is to present the results from the GD SDR on-orbit performance testing using the launch waveform over TDRSS. The tests include the evaluation of well-tested waveform modes, the operation of RF links that are expected to have high margins, the verification of forward return link operation (including full duplex), the verification of non-coherent operational models, and the verification of radio at-launch operational frequencies. This report also outlines the launch waveform tests conducted and comparisons to the results obtained from ground testing.

  5. Full Waveform Inversion Using Nonlinearly Smoothed Wavefields

    KAUST Repository

    Li, Y.

    2017-05-26

    The lack of low frequency information in the acquired data makes full waveform inversion (FWI) conditionally converge to the accurate solution. An initial velocity model that results in data with events within a half cycle of their location in the observed data was required to converge. The multiplication of wavefields with slightly different frequencies generates artificial low frequency components. This can be effectively utilized by multiplying the wavefield with itself, which is nonlinear operation, followed by a smoothing operator to extract the artificially produced low frequency information. We construct the objective function using the nonlinearly smoothed wavefields with a global-correlation norm to properly handle the energy imbalance in the nonlinearly smoothed wavefield. Similar to the multi-scale strategy, we progressively reduce the smoothing width applied to the multiplied wavefield to welcome higher resolution. We calculate the gradient of the objective function using the adjoint-state technique, which is similar to the conventional FWI except for the adjoint source. Examples on the Marmousi 2 model demonstrate the feasibility of the proposed FWI method to mitigate the cycle-skipping problem in the case of a lack of low frequency information.

  6. Full Waveform Inversion of Solar Interior Flows

    CERN Document Server

    Hanasoge, Shravan M

    2014-01-01

    The inference of flows of material in the interior of the Sun is a subject of major interest in helioseismology. Here we apply techniques of Full Waveform Inversion (FWI) to synthetic data to test flow inversions. In this idealized setup, we do not model seismic realization noise, training the focus entirely on the problem of whether a chosen supergranulation flow model can be seismically recovered. We define the misfit functional as a sum of L_2 norm deviations in travel times between prediction and observation, as measured using short-distance f and p_1 filtered and large-distance unfiltered $p$ modes. FWI allows for the introduction of measurements of choice and iteratively improving the background model, while monitoring the evolution of the misfit in all desired categories. Although the misfit is seen to uniformly reduce in all categories, convergence to the true model is very slow, possibly because it is trapped in a local minimum. The primary source of error is inaccurate depth localization, which, owi...

  7. Tsunami waveform inversion by adjoint methods

    Science.gov (United States)

    Pires, Carlos; Miranda, Pedro M. A.

    2001-09-01

    An adjoint method for tsunami waveform inversion is proposed, as an alternative to the technique based on Green's functions of the linear long wave model. The method has the advantage of being able to use the nonlinear shallow water equations, or other appropriate equation sets, and to optimize an initial state given as a linear or nonlinear function of any set of free parameters. This last facility is used to perform explicit optimization of the focal fault parameters, characterizing the initial sea surface displacement of tsunamigenic earthquakes. The proposed methodology is validated with experiments using synthetic data, showing the possibility of recovering all relevant details of a tsunami source from tide gauge observations, providing that the adjoint method is constrained in an appropriate manner. It is found, as in other methods, that the inversion skill of tsunami sources increases with the azimuthal and temporal coverage of assimilated tide gauge stations; furthermore, it is shown that the eigenvalue analysis of the Hessian matrix of the cost function provides a consistent and useful methodology to choose the subset of independent parameters that can be inverted with a given dataset of observations and to evaluate the error of the inversion process. The method is also applied to real tide gauge series, from the tsunami of the February 28, 1969, Gorringe Bank earthquake, suggesting some reasonable changes to the assumed focal parameters of that event. It is suggested that the method proposed may be able to deal with transient tsunami sources such as those generated by submarine landslides.

  8. Waveform Analysis of AE in Composites

    Science.gov (United States)

    Prosser, William H.

    1998-01-01

    Advanced, waveform based acoustic emission (AE) techniques have been developed to evaluate damage mechanisms in the testing of composite materials. This approach, more recently referred to as Modal AE, provides an enhanced capability to discriminate and eliminate noise signals from those generated by damage mechanisms. Much more precise source location can also be obtained in comparison to conventional, threshold crossing arrival time determination techniques. Two successful examples of the application of Modal AE are presented in this work. In the first, the initiation of transverse matrix cracking in cross-ply, tensile coupons was monitored. In these tests, it was documented that the same source mechanism, matrix cracking, can produce widely different AE signal amplitudes dependent on laminate stacking sequence and thickness. These results, taken together with well known propagation effects of attenuation and dispersion of AE signals in composite laminates, cast further doubt on the validity of simple amplitude or amplitude distribution analysis for AE source determination. For the second example, delamination propagation in composite ring specimens was monitored. Pressurization of these composite rings is used to simulate the stresses in a composite rocket motor case. AE signals from delamination propagation were characterized by large amplitude flexural plate mode components which have long signal durations because of the large dispersion of this mode.

  9. Waveform synthesis for imaging and ranging applications

    Science.gov (United States)

    Doerry, Armin W.; Dudley, Peter A.; Dubert, Dale F.; Tise, Bertice L.

    2004-12-07

    Frequency dependent corrections are provided for quadrature imbalance and Local Oscillator (LO) feed-through. An operational procedure filters imbalance and LO feed-through effects without prior calibration or equalization. Waveform generation can be adjusted/corrected in a synthetic aperture radar system (SAR), where a rolling phase shift is applied to the SAR's QDWS signal where it is demodulated in a receiver; unwanted energies, such as LO feed-through and/or imbalance energy, are separated from a desired signal in Doppler; the separated energy is filtered from the receiver leaving the desired signal; and the separated energy in the receiver is measured to determine the degree of imbalance that is represented by it. Calibration methods can also be implemented into synthesis. The degree of LO feed-through and imbalance can be used to determine calibration values that can then be provided as compensation for frequency dependent errors in components, such as the QDWS and SSB mixer, affecting quadrature signal quality.

  10. Inversion method for initial tsunami waveform reconstruction

    Directory of Open Access Journals (Sweden)

    V. V. Voronin

    2014-12-01

    Full Text Available This paper deals with the application of r-solution method to recover the initial tsunami waveform in a tsunami source area by remote water-level measurements. Wave propagation is considered within the scope of a linear shallow-water theory. An ill-posed inverse problem is regularized by means of least square inversion using a truncated SVD approach. The properties of obtained solution are determined to a large extent by the properties of an inverse operator, which were numerically investigated. The method presented allows one to control instability of the numerical solution and to obtain an acceptable result in spite of ill-posedness of the problem. It is shown that the accuracy of tsunami source reconstruction strongly depends on the signal-to-noise ratio, the azimuthal coverage of recording stations with respect to the source area and bathymetric features along the wave path. The numerical experiments were carried out with synthetic data and various computational domains including a real bathymetry. The method proposed allows us to make a preliminary prediction of the efficiency of the inversion with a given set of the recording stations and to find out the most informative part of the existing observation system. This essential property of the method can prove to be useful in designing a monitoring system for tsunamis.

  11. Public health and health education in faith communities.

    Science.gov (United States)

    Chatters, L M; Levin, J S; Ellison, C G

    1998-12-01

    This special issue of Health Education & Behavior is devoted to broadly examining the interconnections among public health, health education, and faith-based communities. In addition to a focus on questions related to the practice of public health and health education within religious settings (e.g., program development, implementation, and evaluation), the articles in this issue examine a broad range of both substantive and methodological questions and concerns. These articles include contributions that address (1) various theoretical and conceptual issues and frameworks explaining the relationships between religious involvement and health; (2) substantive reviews of current research in the area; (3) individual empirical studies exploring the associations between religious involvement and health attitudes, beliefs, and behaviors; (4) evaluations of health education programs in faith communities; and (5) religious institutions and their contributions to the development of health policy. The articles comprising the issue are selective in their coverage of the field and provide different and complementary perspectives on the connections between religious involvement and health. It is hoped that this approach will appeal to a broad audience of researchers, practitioners, policy makers, and others from health education, public health, and related social and behavioral science disciplines.

  12. A scalable, fast and multichannel arbitrary waveform generator

    CERN Document Server

    Baig, Muhammad Tanveer; Wiese, Andreas; Heidbrink, Stefan; Ziolkowski, Michael; Wunderlich, Christof

    2013-01-01

    This article reports on development of a multichannel arbitrary waveform generator (MAWG), which simultaneously generates arbitrary voltage waveforms on 24 independent channels with a dynamic update rate of up to 25 Msps. A real-time execution of a single waveform and/or sequence of multiple waveforms in succession, with a user programmable arbitrary sequence order is provided under the control of a stand-alone sequencer circuit implemented using an FPGA. The device is operated using an internal clock and can be synced to other devices by means of the TTL pulses. The device can be used for output voltages in the range of up to +-9 V with a drift rate below +-10 uV/min and a maximum deviation less than +- 300 uVpp over a period of two hours.

  13. Multiscale Stategies in Automatic Image-Domain Waveform Tomography

    Institute of Scientific and Technical Information of China (English)

    Yujin Liu; Zhenchun Li

    2015-01-01

    Multiscale strategies are very important in the successful application of waveform-based velocity inversion. The strategy that sequentially preceeds from long to short scale of velocity model, has been well developed in full waveform inversion (FWI) to solve the local mininum problem. In contrast, it’s not well understood in the image-domain waveform tomography (IWT), which back-projects incoherent waveform components of the common image gather into velocity updates. IWT is less prone to local minimum problem but tends to build long-scale model with low resolution. In order to build both long- and short-scale model by IWT, we discuss several multiscale strategies restricted in the image domain. The strategies include model reparameterization, objective function switching and gradient rescaling. Numerical tests on Marmsousi model and real data demonstrate that our proposed multiscale IWT is effective in buidling velocity model with wide wavenumber spectrum.

  14. Generation of correlated finite alphabet waveforms using gaussian random variables

    KAUST Repository

    Ahmed, Sajid

    2016-01-13

    Various examples of methods and systems are provided for generation of correlated finite alphabet waveforms using Gaussian random variables in, e.g., radar and communication applications. In one example, a method includes mapping an input signal comprising Gaussian random variables (RVs) onto finite-alphabet non-constant-envelope (FANCE) symbols using a predetermined mapping function, and transmitting FANCE waveforms through a uniform linear array of antenna elements to obtain a corresponding beampattern. The FANCE waveforms can be based upon the mapping of the Gaussian RVs onto the FANCE symbols. In another example, a system includes a memory unit that can store a plurality of digital bit streams corresponding to FANCE symbols and a front end unit that can transmit FANCE waveforms through a uniform linear array of antenna elements to obtain a corresponding beampattern. The system can include a processing unit that can encode the input signal and/or determine the mapping function.

  15. Hybridizing Gravitationl Waveforms of Inspiralling Binary Neutron Star Systems

    Science.gov (United States)

    Cullen, Torrey; LIGO Collaboration

    2016-03-01

    Gravitational waves are ripples in space and time and were predicted to be produced by astrophysical systems such as binary neutron stars by Albert Einstein. These are key targets for Laser Interferometer and Gravitational Wave Observatory (LIGO), which uses template waveforms to find weak signals. The simplified template models are known to break down at high frequency, so I wrote code that constructs hybrid waveforms from numerical simulations to accurately cover a large range of frequencies. These hybrid waveforms use Post Newtonian template models at low frequencies and numerical data from simulations at high frequencies. They are constructed by reading in existing Post Newtonian models with the same masses as simulated stars, reading in the numerical data from simulations, and finding the ideal frequency and alignment to ``stitch'' these waveforms together.

  16. Multifocal pattern VEP perimetry: analysis of sectoral waveforms.

    Science.gov (United States)

    Klistorner, A I; Graham, S L

    1999-01-01

    The objective detection of local visual field defects using multi-focal pattern visual evoked potentials (VEP) has recently been described. The individual waveforms show variable polarity in different parts of the visual field due to underlying cortical convolutions. Normal trace arrays were examined to determine if certain areas of similar waveform could be grouped for analysis, while minimising cancellation of data. The VEP was assessed using multi-focal pseudo-randomly alternated pattern stimuli which were cortically scaled in size. Bipolar occipital electrodes were used for recording. Waveforms were compared for different locations within the field up to 25 degrees of eccentricity. Analysis of sectors showing similarly shaped waveforms was performed. Twelve normal subjects were studied. Grouping waveforms by sectors of similar waveform increased the total calculated upper hemifield amplitude by 60%, compared with simple summations of responses for the whole hemifield. The inferior hemifield showed more consistent waveforms throughout, with the amplitude only increasing by 11% with sectoral summation. Intra-subject variability (10.6%) is less for sectors than for individual points (17.3%). Inter-subject amplitude differences are high, calculated at 56% for individual points and 45% for sectors. Due to differences in waveform as a result of underlying cortical anatomy, individual VEP responses from multifocal recordings should be grouped as sectors along the vertical meridian and above and below the horizontal, rather than by hemifields or quadrants. This finding is significant if one is considering within-field grouping strategies similar to the glaucoma hemifield test used in conventional perimetry, or reporting derived overall VEP amplitudes and latencies from a multifocal recording. Large amplitude variations between individuals and small signals from horizontal and upper field seen in single channel recording, still limit the application of this technique as

  17. Binary black hole waveform extraction at null infinity

    Energy Technology Data Exchange (ETDEWEB)

    Babiuc, M C [Department of Physics, Marshall University, Huntington, WV 25755 (United States); Winicour, J [Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260 (United States); Zlochower, Y, E-mail: babiuc@marshall.edu [Center for Computational Relativity and Gravitation and School of Mathematical Sciences, Rochester Institute of Technology, Rochester, NY 14623 (United States)

    2011-07-07

    In this paper, we present a work in progress toward an efficient and economical computational module which interfaces between Cauchy and characteristic evolution codes. Our goal is to provide a standardized waveform extraction tool for the numerical relativity community which will allow CCE to be readily applied to a generic Cauchy code. The tool provides a means of unambiguous comparison between the waveforms generated by evolution codes based upon different formulations of the Einstein equations and different numerical approximation.

  18. Seismic Waveform Characterization at LLNL: Analyst Guidelines and Issues

    Energy Technology Data Exchange (ETDEWEB)

    Ryall, F; Schultz, C A

    2001-11-01

    In the first section of this paper we present an overview of general set of procedures that we have followed in seismic waveform analysis. In the second section we discuss a number of issues and complexities that we have encountered in analysis of events in the Middle East, North Africa, Europe, and parts of the European Arctic. To illustrate these complexities we can include examples of waveforms recorded over a variety of paths in these regions.

  19. Use and Abuse of the Model Waveform Accuracy Standards

    Science.gov (United States)

    Lindblom, Lee

    2010-02-01

    Accuracy standards have been developed to ensure that the waveforms used for gravitational-wave data analysis are good enough to serve their intended purposes. These standards place constraints on certain norms of the frequency-domain representations of the waveform errors. Examples will be presented of possible misinterpretations and misapplications of these standards, whose effect could be to vitiate the quality control they were intended to enforce. Suggestions will be given for ways to avoid these problems. )

  20. Anisotropic wave-equation traveltime and waveform inversion

    KAUST Repository

    Feng, Shihang

    2016-09-06

    The wave-equation traveltime and waveform inversion (WTW) methodology is developed to invert for anisotropic parameters in a vertical transverse isotropic (VTI) meidum. The simultaneous inversion of anisotropic parameters v0, ε and δ is initially performed using the wave-equation traveltime inversion (WT) method. The WT tomograms are then used as starting background models for VTI full waveform inversion. Preliminary numerical tests on synthetic data demonstrate the feasibility of this method for multi-parameter inversion.

  1. Optimal current waveforms for brushless permanent magnet motors

    Science.gov (United States)

    Moehle, Nicholas; Boyd, Stephen

    2015-07-01

    In this paper, we give energy-optimal current waveforms for a permanent magnet synchronous motor that result in a desired average torque. Our formulation generalises previous work by including a general back-electromotive force (EMF) wave shape, voltage and current limits, an arbitrary phase winding connection, a simple eddy current loss model, and a trade-off between power loss and torque ripple. Determining the optimal current waveforms requires solving a small convex optimisation problem. We show how to use the alternating direction method of multipliers to find the optimal current in milliseconds or hundreds of microseconds, depending on the processor used, which allows the possibility of generating optimal waveforms in real time. This allows us to adapt in real time to changes in the operating requirements or in the model, such as a change in resistance with winding temperature, or even gross changes like the failure of one winding. Suboptimal waveforms are available in tens or hundreds of microseconds, allowing for quick response after abrupt changes in the desired torque. We demonstrate our approach on a simple numerical example, in which we give the optimal waveforms for a motor with a sinusoidal back-EMF, and for a motor with a more complicated, nonsinusoidal waveform, in both the constant-torque region and constant-power region.

  2. Full Elastic Waveform Search Engine for Near Surface Imaging

    Science.gov (United States)

    Zhang, J.; Zhang, X.

    2014-12-01

    For processing land seismic data, the near-surface problem is often very complex and may severely affect our capability to image the subsurface. The current state-of-the-art technology for near surface imaging is the early arrival waveform inversion that solves an acoustic wave-equation problem. However, fitting land seismic data with acoustic wavefield is sometimes invalid. On the other hand, performing elastic waveform inversion is very time-consuming. Similar to a web search engine, we develop a full elastic waveform search engine that includes a large database with synthetic elastic waveforms accounting for a wide range of interval velocity models in the CMP domain. With each CMP gather of real data as an entry, the search engine applies Multiple-Randomized K-Dimensional (MRKD) tree method to find approximate best matches to the entry in about a second. Interpolation of the velocity models at CMP positions creates 2D or 3D Vp, Vs, and density models for the near surface area. The method does not just return one solution; it gives a series of best matches in a solution space. Therefore, the results can help us to examine the resolution and nonuniqueness of the final solution. Further, this full waveform search method can avoid the issues of initial model and cycle skipping that the method of full waveform inversion is difficult to deal with.

  3. Estimation of airway obstruction using oximeter plethysmograph waveform data

    Directory of Open Access Journals (Sweden)

    Desmond Renee' A

    2005-06-01

    Full Text Available Abstract Background Validated measures to assess the severity of airway obstruction in patients with obstructive airway disease are limited. Changes in the pulse oximeter plethysmograph waveform represent fluctuations in arterial flow. Analysis of these fluctuations might be useful clinically if they represent physiologic perturbations resulting from airway obstruction. We tested the hypothesis that the severity of airway obstruction could be estimated using plethysmograph waveform data. Methods Using a closed airway circuit with adjustable inspiratory and expiratory pressure relief valves, airway obstruction was induced in a prospective convenience sample of 31 healthy adult subjects. Maximal change in airway pressure at the mouthpiece was used as a surrogate measure of the degree of obstruction applied. Plethysmograph waveform data and mouthpiece airway pressure were acquired for 60 seconds at increasing levels of inspiratory and expiratory obstruction. At each level of applied obstruction, mean values for maximal change in waveform area under the curve and height as well as maximal change in mouth pressure were calculated for sequential 7.5 second intervals. Correlations of these waveform variables with mouth pressure values were then performed to determine if the magnitude of changes in these variables indicates the severity of airway obstruction. Results There were significant relationships between maximal change in area under the curve (P Conclusion The findings suggest that mathematic interpretation of plethysmograph waveform data may estimate the severity of airway obstruction and be of clinical utility in objective assessment of patients with obstructive airway diseases.

  4. Quantification of wave reflection using peripheral blood pressure waveforms.

    Science.gov (United States)

    Kim, Chang-Sei; Fazeli, Nima; McMurtry, M Sean; Finegan, Barry A; Hahn, Jin-Oh

    2015-01-01

    This paper presents a novel minimally invasive method for quantifying blood pressure (BP) wave reflection in the arterial tree. In this method, two peripheral BP waveforms are analyzed to obtain an estimate of central aortic BP waveform, which is used together with a peripheral BP waveform to compute forward and backward pressure waves. These forward and backward waves are then used to quantify the strength of wave reflection in the arterial tree. Two unique strengths of the proposed method are that 1) it replaces highly invasive central aortic BP and flow waveforms required in many existing methods by less invasive peripheral BP waveforms, and 2) it does not require estimation of characteristic impedance. The feasibility of the proposed method was examined in an experimental swine subject under a wide range of physiologic states and in 13 cardiac surgery patients. In the swine subject, the method was comparable to the reference method based on central aortic BP and flow. In cardiac surgery patients, the method was able to estimate forward and backward pressure waves in the absence of any central aortic waveforms: on the average, the root-mean-squared error between actual versus computed forward and backward pressure waves was less than 5 mmHg, and the error between actual versus computed reflection index was less than 0.03.

  5. Biomass Estimation for Individual Trees using Waveform LiDAR

    Science.gov (United States)

    Wang, K.; Kumar, P.; Dutta, D.

    2015-12-01

    Vegetation biomass information is important for many ecological models that include terrestrial vegetation in their simulations. Biomass has strong influences on carbon, water, and nutrient cycles. Traditionally biomass estimation requires intensive, and often destructive, field measurements. However, with advances in technology, airborne LiDAR has become a convenient tool for acquiring such information on a large scale. In this study, we use infrared full waveform LiDAR to estimate biomass information for individual trees in the Sangamon River basin in Illinois, USA. During this process, we also develop automated geolocation calibration algorithms for raw waveform LiDAR data. In the summer of 2014, discrete and waveform LiDAR data were collected over the Sangamon River basin. Field measurements commonly used in biomass equations such as diameter at breast height and total tree height were also taken for four sites across the basin. Using discrete LiDAR data, individual trees are delineated. For each tree, a voxelization methods is applied to all waveforms associated with the tree to result in a pseudo-waveform. By relating biomass extrapolated using field measurements from a training set of trees to waveform metrics for each corresponding tree, we are able to estimate biomass on an individual tree basis. The results can be especially useful as current models increase in resolution.

  6. Influential factors for pressure pulse waveform in healthy young adults.

    Science.gov (United States)

    Du, Yi; Wang, Ling; Li, Shuyu; Zhi, Guang; Li, Deyu; Zhang, Chi

    2015-01-01

    The effects of gender and other contributory factors on pulse waveform are still under arguments. In view of different results caused by few considerations of possible influential factors and general agreement of gender relating to pulse waveform, this study aims to address the confounding factors interfering with the association between gender and pulse waveform characteristics. A novel method was proposed to noninvasively detect pressure pulse wave and assess the morphology of pulse wave. Forty healthy young subjects were included in the present research. Height, weight, systolic blood pressure (SBP), and diastolic blood pressure (DBP) were measured manually and body mass index (BMI), pulse blood pressure (PP) and heart rate (HR) were calculated automatically. Student's t test was used to analyze the gender difference and analysis of variance (ANOVA) to examine the effects of intrinsic factors. Univariate regression analysis was performed to assess the main factors on the waveform characteristics. Waveform features were found significantly different between genders. However this study indicates that the main factors for time-related and amplitude-related parameters are HR and SBP respectively. In conclusion, the impact of HR and SBP on pulse waveform features should not be underestimated, especially when analyzing the gender difference.

  7. Design and Testing of Space Telemetry SCA Waveform

    Science.gov (United States)

    Mortensen, Dale J.; Handler, Louis M.; Quinn, Todd M.

    2006-01-01

    A Software Communications Architecture (SCA) Waveform for space telemetry is being developed at the NASA Glenn Research Center (GRC). The space telemetry waveform is implemented in a laboratory testbed consisting of general purpose processors, field programmable gate arrays (FPGAs), analog-to-digital converters (ADCs), and digital-to-analog converters (DACs). The radio hardware is integrated with an SCA Core Framework and other software development tools. The waveform design is described from both the bottom-up signal processing and top-down software component perspectives. Simulations and model-based design techniques used for signal processing subsystems are presented. Testing with legacy hardware-based modems verifies proper design implementation and dynamic waveform operations. The waveform development is part of an effort by NASA to define an open architecture for space based reconfigurable transceivers. Use of the SCA as a reference has increased understanding of software defined radio architectures. However, since space requirements put a premium on size, mass, and power, the SCA may be impractical for today s space ready technology. Specific requirements for an SCA waveform and other lessons learned from this development are discussed.

  8. Waveform descriptor for pulse onset detection of intracranial pressure signal.

    Science.gov (United States)

    Yang, Li; Zhao, Mingxi; Peng, Chenglin; Hu, Xiao; Feng, Hua; Ji, Zhong

    2012-03-01

    We present an algorithm to identify the onset of intracranial pressure (ICP) pulses. The algorithm creates a waveform descriptor to extract the feature of each local minimum of the waveform and then identifies the onset by comparing the feature with a customized template. The waveform descriptor is derived by transforming the vectors connecting a given point and the local waveform samples around it into log-polar coordinates and ranking them into uniform bins. Using an ICP dataset consisting of 40933 normal beats and 306 segments of artifacts and noise, we investigated the performance of our algorithm (waveform descriptor, WD), global minimum within a sliding window (GM) and two other algorithms originally proposed for arterial blood pressure (ABP) signal (slope sum function, SSF and pulse waveform delineator, PUD). As a result, all the four algorithms showed good performance and WD showed overall better one. At a tolerance level of 30 ms (i.e., the predicted onset and ground truth were considered as correctly matched if the distance between the two was equal or less than 30 ms), WD achieved a sensitivity of 0.9723 and PPV of 0.9475, GM achieved a sensitivity of 0.9226 and PPV of 0.8968, PUD achieved a sensitivity of 0.9599 and PPV of 0.9327 and SSF, a sensitivity of 0.9720 and PPV of 0.9136. The evaluation indicates that the algorithms are effective for identifying the onset of ICP pulses.

  9. An improved driving waveform reference grayscale of electrophoretic displays

    Science.gov (United States)

    Wang, Li; Yi, Zichuan; Peng, Bao; Zhou, Guofu

    2015-10-01

    Driving waveform is an important component for gray scale display on the electrophoretic display (EPD). In the traditional driving waveform, a white reference gray scale is formed before writing a new image. However, the reflectance value can not reach agreement in each gray scale transformation. In this paper, a new driving waveform, which has a short waiting time after the formation of reference gray scale, is proposed to improve the consistency of reference gray scale. Firstly, the property of the particles in the microcapsule is analyzed and the change of the EPD reflectance after the white reference gray scale formation is studied. Secondly, the reflectance change curve is fitted by using polynomial and the duration of the waiting time is determined. Thirdly, a set of the new driving waveform is designed by using the rule of DC balance and some real E-ink commercial EPDs are used to test the performance. Experimental results show that the effect of the new driving waveform has a better performance than traditional waveforms.

  10. Frequency-domain waveform inversion using the unwrapped phase

    KAUST Repository

    Choi, Yun Seok

    2011-01-01

    Phase wrapping in the frequency-domain (or cycle skipping in the time-domain) is the major cause of the local minima problem in the waveform inversion. The unwrapped phase has the potential to provide us with a robust and reliable waveform inversion, with reduced local minima. We propose a waveform inversion algorithm using the unwrapped phase objective function in the frequency-domain. The unwrapped phase, or what we call the instantaneous traveltime, is given by the imaginary part of dividing the derivative of the wavefield with respect to the angular frequency by the wavefield itself. As a result, the objective function is given a traveltime-like function, which allows us to smooth it and reduce its nonlinearity. The gradient of the objective function is computed using the back-propagation algorithm based on the adjoint-state technique. We apply both our waveform inversion algorithm using the unwrapped phase and the conventional waveform inversion and show that our inversion algorithm gives better convergence to the true model than the conventional waveform inversion. © 2011 Society of Exploration Geophysicists.

  11. Talker identification from analysis of raw complex waveforms

    Science.gov (United States)

    Stokes, Michael A.

    2002-05-01

    Stokes (1996) demonstrated that visual inspection of raw complex waveforms can be used to identify a vowel produced by a talker. This research resulted in the MAS Model of Vowel Perception and Production (Stokes, 1998; http://home.indy.net/~masmodel/). More recently, another experiment extended this work to female talkers as well as male talkers (Stokes, 2001). Together, this research represents the only ongoing comprehensive research involving visual inspection of raw complex waveforms for identifying vowels produced by any talker. As an extension of the work, the present study involves identifying a talker from a waveform display. Unique voice signatures identified from waveform displays are used to identify a talker from a set of 10 talkers in the same way as one would identify a person from fingerprints. In two trials (the word who'd in trial 1 and heed in trial 2), a talker was correctly identified from a set of 10 unique talkers per trial using small visual samples of waveforms and matching it to a waveform sample of the talkers to be identified.

  12. Modularized seismic full waveform inversion based on waveform sensitivity kernels - The software package ASKI

    Science.gov (United States)

    Schumacher, Florian; Friederich, Wolfgang; Lamara, Samir; Gutt, Phillip; Paffrath, Marcel

    2015-04-01

    We present a seismic full waveform inversion concept for applications ranging from seismological to enineering contexts, based on sensitivity kernels for full waveforms. The kernels are derived from Born scattering theory as the Fréchet derivatives of linearized frequency-domain full waveform data functionals, quantifying the influence of elastic earth model parameters and density on the data values. For a specific source-receiver combination, the kernel is computed from the displacement and strain field spectrum originating from the source evaluated throughout the inversion domain, as well as the Green function spectrum and its strains originating from the receiver. By storing the wavefield spectra of specific sources/receivers, they can be re-used for kernel computation for different specific source-receiver combinations, optimizing the total number of required forward simulations. In the iterative inversion procedure, the solution of the forward problem, the computation of sensitivity kernels and the derivation of a model update is held completely separate. In particular, the model description for the forward problem and the description of the inverted model update are kept independent. Hence, the resolution of the inverted model as well as the complexity of solving the forward problem can be iteratively increased (with increasing frequency content of the inverted data subset). This may regularize the overall inverse problem and optimizes the computational effort of both, solving the forward problem and computing the model update. The required interconnection of arbitrary unstructured volume and point grids is realized by generalized high-order integration rules and 3D-unstructured interpolation methods. The model update is inferred solving a minimization problem in a least-squares sense, resulting in Gauss-Newton convergence of the overall inversion process. The inversion method was implemented in the modularized software package ASKI (Analysis of Sensitivity

  13. A survey of faith leaders concerning health promotion and the level of healthy living activities occurring in faith communities in Scotland.

    Science.gov (United States)

    Fagan, Donna M; Kiger, Alice; van Teijlingen, Edwin

    2010-12-01

    Faith groups constitute a growing health promotion partner in North America where they help increase community capacity. However, in the United Kingdom this collaboration is seemingly far less developed. This study sought to find evidence of health promotion in faith communities and examine perceptions and attitudes concerning health promotion among faith leaders. It also sought to establish the level to which health-promoting activities currently occur in, and are organized by, places of worship in one Scottish city, Dundee. The authors distributed a self-administered questionnaire to representatives of all faith communities in Dundee (response rate 71%, n = 50). The survey identified existing, well-formed community groups, some of whom already engaged in health-promoting activities, and shared similar interests with health promotion professionals. Generally, faith leaders were positive towards the concept of health promotion and many considered health promotion to be compatible with their mission. Not all denominations were equally involved in health promotion activities, for example, some conducted annual one-off activities, while others had well-established walking groups or exercise classes. The responses suggest a degree of readiness by faith communities to engage, if invited, in health promotion programmes. These results also indicate that faith groups may constitute untapped resources, poised to contribute to local health promotion efforts. The article concludes that as the National Health Service (NHS) invests in community-based health initiatives that can have long-term sustainability, it is reasonable to make links between what is happening in North America, the interest in health promotion reported by faith leaders in this study and the possibilities for their participation in voluntary sector community health partnerships.

  14. Common Ground with "A Common Faith": Dewey's Idea of the "Religious"

    Science.gov (United States)

    Baurain, Bradley

    2011-01-01

    In "A Common Faith", Dewey rejects organized religion and belief in the supernatural, instead arguing for an authentically "religious" attitude which this interpretive essay analyzes in terms of four propositions: (1) Knowledge is unified. (2) Knowledge is democratic. (3) The pursuit of moral ideals requires moral faith. (4) The authority for…

  15. From Indoctrination to Initiation: A Non-Coercive Approach to Faith-Learning Integration

    Science.gov (United States)

    Reichard, Joshua D.

    2013-01-01

    This article contributes to ongoing discussions related to the nature, scope, and methods of faith-learning integration. The "initiation" approach developed by Tim McDonough (2011) is adapted to faith-learning integration in an attempt to bridge polarizing discussions regarding indoctrination versus rational autonomy and critical…

  16. Social Justice and Faith Maturity: Exploring Whether Religious Beliefs Impact Civic Engagement

    Science.gov (United States)

    Kozlowski, Christine; Ferrari, Joseph R.; Odahl, Charlynn

    2014-01-01

    The current study compared perceptions by college students (n = 304; M age=19.75 years old) enrolled at an urban and diverse Roman Catholic university on self-report measures of faith/belief structures, social justice, and community service attitudes. Survey results indicated that both horizontal and vertical faith maturity perceptions…

  17. Developing a Program-Level Faith Integration Curriculum: A Case Study from Physics

    Science.gov (United States)

    McCoy, Bradley K.

    2014-01-01

    Integrating faith with academics possesses significant benefits for students, because it connects major disciplines to students' personal values and goals, prepares students to be effective and faithful professionals in their discipline and vocation, and develops students' understanding of the nature of their discipline. However, to…

  18. Developing Graduate Curricula Faithful to Professional Training and a Christian Worldview

    Science.gov (United States)

    Grauf-Grounds, Claudia; Edwards, Scott; Macdonald, Don; Quek, Karen Mui-Teng; Sellers, Tina Schermer

    2009-01-01

    Trends in Christian higher education indicate a growing interest in professional training programs that take Christian faith commitments and values seriously. This article explores one professional graduate program with secondary accreditation that attempts to be faithful to a Christian worldview while at the same time honoring the developments…

  19. Teaching about Faith-Based Organizations in the Social Work Curriculum: Perspectives of Social Work Educators

    Science.gov (United States)

    Pandya, Samta P.

    2016-01-01

    Faith-based organizations (FBOs) have an important presence in contemporary civil society and have gained further prominence through their repertoire of social welfare and services. This study engaged social work educators (n = 316) across nine countries to examine their perceptions of including discourses on faith and FBOs in the social work…

  20. Categorizing "Others": The Segmentation of Other Actors for "Faith in Others' Efficacy (FIO)"

    Science.gov (United States)

    Ng, Chi Kwan; D'Souza, Clare

    2016-01-01

    This conceptual paper provides an innovative categorization of "others" for the variable of "faith in others (FIO)". Adopted by pro-environmental and sustainability literature, FIO refers to faith in the efficacy of other actors. Examination and integration of theories on sustainable pro-environmental behavior leads to the…

  1. The importance of life and faith histories in the methodology of Practical Theology

    NARCIS (Netherlands)

    Bons-Storm, Riet

    2002-01-01

    The basic questions of Practical Theology concern the development of a community of faith built on, and building the faithful lives of its members in their particular contexts. This article is an exploration of the biographical method - as a means of qualitative empirical research - to obtain data c

  2. How can you resist? Executive control helps romantically involved individuals to stay faithful

    NARCIS (Netherlands)

    Pronk, T.M.; Karremans, J.C.T.M.; Wigboldus, D.H.J.

    2011-01-01

    In the present research, we examined why some people have more difficulty than others in staying faithful to their romantic partners. Three studies supported our main prediction that executive control is associated with romantically involved individuals' ability to stay faithful. Study 1 showed that

  3. Faith-Based Mental Health Interventions with African Americans: A Review

    Science.gov (United States)

    Hays, Krystal; Aranda, Maria P.

    2016-01-01

    Faith-based interventions have emerged culturally sensitive way to address mental health issues among African Americans. This systematic review explores the scope and efficacy of faith-based mental health intervention outcomes among African Americans. Extracted data included the study population, setting, study design, intervention, adaptations,…

  4. Balancing Identity and Diversity in Faith-Based Nursing Education: A Case Study from Northern Europe

    Science.gov (United States)

    Tveit, Bodil; Karvinen, Ikali; Damsma-Bakker, Alica; Ylönen, Merja; Oosterhoff-Zielman, Marjanne; Fanuelsen, Olav; van Leeuwen, Réné

    2015-01-01

    The role of faith-based nursing education is contested in today's Northern European societies, which are often described as postmodern, pluralist, or secular. Although faith-based institutions played pioneering roles in the early development of nursing education, many today downplay their religious roots and have transformed themselves into modern…

  5. 24 CFR 100.308 - Good faith defense against civil money damages.

    Science.gov (United States)

    2010-04-01

    ... 24 Housing and Urban Development 1 2010-04-01 2010-04-01 false Good faith defense against civil money damages. 100.308 Section 100.308 Housing and Urban Development Regulations Relating to Housing and... Good faith defense against civil money damages. (a) A person shall not be held personally liable...

  6. System and Method for Generating a Frequency Modulated Linear Laser Waveform

    Science.gov (United States)

    Pierrottet, Diego F. (Inventor); Petway, Larry B. (Inventor); Amzajerdian, Farzin (Inventor); Barnes, Bruce W. (Inventor); Lockard, George E. (Inventor); Hines, Glenn D. (Inventor)

    2017-01-01

    A system for generating a frequency modulated linear laser waveform includes a single frequency laser generator to produce a laser output signal. An electro-optical modulator modulates the frequency of the laser output signal to define a linear triangular waveform. An optical circulator passes the linear triangular waveform to a band-pass optical filter to filter out harmonic frequencies created in the waveform during modulation of the laser output signal, to define a pure filtered modulated waveform having a very narrow bandwidth. The optical circulator receives the pure filtered modulated laser waveform and transmits the modulated laser waveform to a target.

  7. System and Method for Generating a Frequency Modulated Linear Laser Waveform

    Science.gov (United States)

    Pierrottet, Diego F. (Inventor); Petway, Larry B. (Inventor); Amzajerdian, Farzin (Inventor); Barnes, Bruce W. (Inventor); Lockard, George E. (Inventor); Hines, Glenn D. (Inventor)

    2014-01-01

    A system for generating a frequency modulated linear laser waveform includes a single frequency laser generator to produce a laser output signal. An electro-optical modulator modulates the frequency of the laser output signal to define a linear triangular waveform. An optical circulator passes the linear triangular waveform to a band-pass optical filter to filter out harmonic frequencies created in the waveform during modulation of the laser output signal, to define a pure filtered modulated waveform having a very narrow bandwidth. The optical circulator receives the pure filtered modulated laser waveform and transmits the modulated laser waveform to a target.

  8. Global and local waveform simulations using the VERCE platform

    Science.gov (United States)

    Garth, Thomas; Saleh, Rafiq; Spinuso, Alessandro; Gemund, Andre; Casarotti, Emanuele; Magnoni, Federica; Krischner, Lion; Igel, Heiner; Schlichtweg, Horst; Frank, Anton; Michelini, Alberto; Vilotte, Jean-Pierre; Rietbrock, Andreas

    2017-04-01

    In recent years the potential to increase resolution of seismic imaging by full waveform inversion has been demonstrated on a range of scales from basin to continental scales. These techniques rely on harnessing the computational power of large supercomputers, and running large parallel codes to simulate the seismic wave field in a three-dimensional geological setting. The VERCE platform is designed to make these full waveform techniques accessible to a far wider spectrum of the seismological community. The platform supports the two widely used spectral element simulation programs SPECFEM3D Cartesian, and SPECFEM3D globe, allowing users to run a wide range of simulations. In the SPECFEM3D Cartesian implementation the user can run waveform simulations on a range of pre-loaded meshes and velocity models for specific areas, or upload their own velocity model and mesh. In the new SPECFEM3D globe implementation, the user will be able to select from a number of continent scale model regions, or perform waveform simulations for the whole earth. Earthquake focal mechanisms can be downloaded within the platform, for example from the GCMT catalogue, or users can upload their own focal mechanism catalogue through the platform. The simulations can be run on a range of European supercomputers in the PRACE network. Once a job has been submitted and run through the platform, the simulated waveforms can be manipulated or downloaded for further analysis. The misfit between the simulated and recorded waveforms can then be calculated through the platform through three interoperable workflows, for raw-data access (FDSN) and caching, pre-processing and finally misfit. The last workflow makes use of the Pyflex analysis software. In addition, the VERCE platform can be used to produce animations of waveform propagation through the velocity model, and synthetic shakemaps. All these data-products are made discoverable and re-usable thanks to the VERCE data and metadata management layer. We

  9. A Simple Adaptive Transfer Function for Deriving the Central Blood Pressure Waveform from a Radial Blood Pressure Waveform.

    Science.gov (United States)

    Gao, Mingwu; Rose, William C; Fetics, Barry; Kass, David A; Chen, Chen-Huan; Mukkamala, Ramakrishna

    2016-09-14

    Generalized transfer functions (GTFs) are available to compute the more relevant central blood pressure (BP) waveform from a more easily measured radial BP waveform. However, GTFs are population averages and therefore may not adapt to variations in pulse pressure (PP) amplification (ratio of radial to central PP). A simple adaptive transfer function (ATF) was developed. First, the transfer function is defined in terms of the wave travel time and reflection coefficient parameters of an arterial model. Then, the parameters are estimated from the radial BP waveform by exploiting the observation that central BP waveforms exhibit exponential diastolic decays. The ATF was assessed using the original data that helped popularize the GTF. These data included radial BP waveforms and invasive reference central BP waveforms from cardiac catheterization patients. The data were divided into low, middle, and high PP amplification groups. The ATF estimated central BP with greater accuracy than GTFs in the low PP amplification group (e.g., central systolic BP and PP root-mean-square-errors of 3.3 and 4.2 mm Hg versus 6.2 and 7.1 mm Hg; p ≤ 0.05) while showing similar accuracy in the higher PP amplification groups. The ATF may permit more accurate, non-invasive central BP monitoring in elderly and hypertensive patients.

  10. Cultural Studies and Matters of Faith: The Case of DhammaWheel.com

    Directory of Open Access Journals (Sweden)

    Edwin Ng

    2011-03-01

    Full Text Available This article begins with the premise that cultural studies has neglected questions about religion and faith. Through an analysis of a discussion in an online Buddhist forum whereby the participants debate the issue of faith vis-a-vis knowledge, the paper explicates how Buddhism negotiates dominant cultural formations and evolves against various contexts of social struggles. The analysis also reveals how the participants articulate a vernacular theory of faith to rethink the relationships between reason, religion, faith, knowledge, and ethics. The article demonstrates how an engagement with a religious discourse elucidates themes that are of interest to cultural studies’ critical project, and argues that cultural studies has an ethical responsibility to engage with religion and address matters of faith.

  11. The Perils of Entanglement: Bilateral Donors, Faith-Based Organisations and International Development (abstract

    Directory of Open Access Journals (Sweden)

    Gerard Clarke

    2013-02-01

    Full Text Available The faith and development interface has become a significant feature of development discourse and policy over the last 15 years. While most of the recent literature treats it as a welcome and positive development, leading to productive engagement between donors and faith communities, the new interface has also proven challenging for donors and faith leaders alike. This chapter explores recent initiatives by European bilateral donors to engage with faith-based organisations (FBOs and efforts by faith communities to create conditions for productive engagement. It also examines some of the resulting controversies and suggests that both donors and FBOs have some distance to travel in creating the conditions and mechanisms that would enable them to work together effectively to combat poverty and social exclusion.

  12. Envisioning Religiously Diverse Partnership Systems among Government, Faith Communities and FBOs

    Directory of Open Access Journals (Sweden)

    Jo Anne Schneider

    2016-08-01

    Full Text Available Recent U.S. policy regarding faith-based organizations (FBO envisions “partnerships with government” that include both financial and non-financial relationships. This paper explores the current nature of a three-way partnership among faith communities, FBOs and government, proposing ways that government could more effectively partner with faith communities and their organizations. I use data from the Faith and Organizations Project and earlier studies of refugee resettlement and social welfare supports. The paper combines research and policy literature with research findings to describe how faith communities organize social services, education, health, senior services and community development through their FBOs, differences among religions and denominations and current forms of partnerships with government. Conclusions provide policy suggestions for U.S. systems.

  13. Development of a Faith-Based Stress Management Intervention in a Rural African American Community

    Science.gov (United States)

    Bryant, Keneshia; Moore, Todd; Willis, Nathaniel; Hadden, Kristie

    2017-01-01

    Background Faith-based mental health interventions developed and implemented using a community-based participatory research (CBPR) approach hold promise for reaching rural African Americans and addressing health disparities. Objectives To describe the development, challenges, and lessons learned from the Trinity Life Management, a faith-based stress management intervention in a rural African American faith community. Methods The researchers used a CBPR approach by partnering with the African American faith community to develop a stress management intervention. Development strategies include working with key informants, focus groups, and a community advisory board (CAB). Results The community identified the key concepts that should be included in a stress management intervention. Conclusions The faith-based “Trinity Life Management” stress management intervention was developed collaboratively by a CAB and an academic research team. The intervention includes stress management techniques that incorporate Biblical principles and information about the stress–distress–depression continuum. PMID:26548794

  14. Faith, Trust and the Perinatal Healthcare Maze in Urban India

    Directory of Open Access Journals (Sweden)

    S. Raman

    2014-05-01

    Full Text Available How women access and utilise health services through pregnancy, childbirth and infancy needs to be understood if we are to improve the delivery of and access to appropriate healthcare. Drawing on ethnographic observations of clinic encounters and in-depth interviews with women in Bangalore, South India, this paper reports on the complexities of negotiating healthcare throughout the perinatal continuum in urban India. Key themes identified include faith and trust in health services, confusion over right to healthcare; and the contested nature of choice for women. What is revealed is a socially restrictive framework that results in choices that seem arbitrary, irrational and self-defeating; poor women being particularly vulnerable. Given the current policy support for public-private-partnerships in reproductive healthcare delivery in India, both public and private health services need to move substantially to achieve true partnership and provide care that is respectful and valued by women and children in urban India.

  15. Youth culture, media and sexuality: What could faith communities contribute?

    Directory of Open Access Journals (Sweden)

    Anita Cloete

    2012-02-01

    Full Text Available This article provided an overview of youth culture and how the media shapes youth culture today. Its specific aim was to focus on the access to sexual content that the different forms of media provide and the possible effect that they have on youth culture today. The sexual development of teenagers is one of the most important areas of their journey into adulthood and can easily be influenced by media messages on sex and sexuality. As such, the sexual behaviour of teenagers mostly seems to demonstrate a misconception on sex and sexuality. The author argued that sex and sexuality can also be viewed as theological issues and concluded by offering a few suggestions on how faith communities can become a more relevant and effective partner in fostering a theological understanding of sex and sexuality, especially to the youth.

  16. EXERCISE WITH BAD FAITH OF SUBJECTIVE CIVIL RIGHTS

    Directory of Open Access Journals (Sweden)

    NICOLAE GRADINARU

    2012-05-01

    Full Text Available The abuse of rights is qualified as civil offence and it may not be different from that of aquilian responsibility, the purpose of its sanction is to protect the victim and not to punish the author. In the Romanian legal doctrine, the abuse of rights was defined as “the exercise of a civil subjective right by breaching the principles of its exercise.” The Constitutional Court held that the person exercising in bad faith and abusively his/her subjective or procedural rights is punishable by appropriate penalties, such as: dismissal of his/her legal action, obligation to bear the costs, application of certain court fines, etc.

  17. An Intensional Concurrent Faithful Encoding of Turing Machines

    Directory of Open Access Journals (Sweden)

    Thomas Given-Wilson

    2014-10-01

    Full Text Available The benchmark for computation is typically given as Turing computability; the ability for a computation to be performed by a Turing Machine. Many languages exploit (indirect encodings of Turing Machines to demonstrate their ability to support arbitrary computation. However, these encodings are usually by simulating the entire Turing Machine within the language, or by encoding a language that does an encoding or simulation itself. This second category is typical for process calculi that show an encoding of lambda-calculus (often with restrictions that in turn simulates a Turing Machine. Such approaches lead to indirect encodings of Turing Machines that are complex, unclear, and only weakly equivalent after computation. This paper presents an approach to encoding Turing Machines into intensional process calculi that is faithful, reduction preserving, and structurally equivalent. The encoding is demonstrated in a simple asymmetric concurrent pattern calculus before generalised to simplify infinite terms, and to show encodings into Concurrent Pattern Calculus and Psi Calculi.

  18. Hybrid Identity. Exploring a Dutch Protestant community of faith

    Directory of Open Access Journals (Sweden)

    R Brouwer

    2008-05-01

    Full Text Available Communities of faith develop their identity in dialogue with changing social and cultural contexts. This article presents a single case of identity formation in a local congregation of the Protestants Church in the Netherlands, in a changing environment. Out of one specific congregational practice, namely the liturgical (non-affirmation of same-sex marriages, the complexity of identity construction in a plural and diverse congregation is shown. From a qualitative empirical research perspective, the details of a congregational practice are unfolded in an ethnographic, thick description of the identity. All the different aspects and voices with regard to the congregational practice together give shape to an identity gestalt. The outcome of this detailed research into one practice of a community of faith is that identity is under construction. Unambiguous and uniform congregational identities are rare. In this particular case the identity is even diffuse. The church council and the congregation members find it difficult to state their identity in a positive way and to find agreement on that. The �hybridisation� of identity is presented as a concept that can shed some light on the nature of identity formation. In a global world, integrated contexts and integrated cultures and identities no longer exist. Contextualisation is a never-ending process. Hybrid identities are construed out of different fragments. Identity construction results from a process of negotiation. This asks for transparant communication and a constructive dealing with differences. As a community of difference, the church as koinonia receives its identity in dialogue with all who are involved. The outcome of this dialogue should be beneficial to not only the congregation but also to its social and cultural environment.

  19. Estimation of earthquake source parameters by the inversion of waveform data: synthetic waveforms

    Science.gov (United States)

    Sipkin, S.A.

    1982-01-01

    Two methods are presented for the recovery of a time-dependent moment-tensor source from waveform data. One procedure utilizes multichannel signal-enhancement theory; in the other a multichannel vector-deconvolution approach, developed by Oldenburg (1982) and based on Backus-Gilbert inverse theory, is used. These methods have the advantage of being extremely flexible; both may be used either routinely or as research tools for studying particular earthquakes in detail. Both methods are also robust with respect to small errors in the Green's functions and may be used to refine estimates of source depth by minimizing the misfits to the data. The multichannel vector-deconvolution approach, although it requires more interaction, also allows a trade-off between resolution and accuracy, and complete statistics for the solution are obtained. The procedures have been tested using a number of synthetic body-wave data sets, including point and complex sources, with satisfactory results. ?? 1982.

  20. Imitation in faith: Enacting Paul’s ambiguous pistis Christou formulations on a Greco-Roman stage

    NARCIS (Netherlands)

    Agteres, Suzan

    2016-01-01

    There is an ongoing debate in New Testament scholarship on the correct interpretation of Paul’s pistis Christou formulations: are we justified by our own faith/trust in Christ, or by participating in Christ’s faith and faithfulness towards God? This article contributes to the position of purposeful

  1. Quantitative analysis of sensor for pressure waveform measurement

    Directory of Open Access Journals (Sweden)

    Tyan Chu-Chang

    2010-01-01

    Full Text Available Abstract Background Arterial pressure waveforms contain important diagnostic and physiological information since their contour depends on a healthy cardiovascular system 1. A sensor was placed at the measured artery and some contact pressure was used to measure the pressure waveform. However, where is the location of the sensor just about enough to detect a complete pressure waveform for the diagnosis? How much contact pressure is needed over the pulse point? These two problems still remain unresolved. Method In this study, we propose a quantitative analysis to evaluate the pressure waveform for locating the position and applying the appropriate force between the sensor and the radial artery. The two-axis mechanism and the modified sensor have been designed to estimate the radial arterial width and detect the contact pressure. The template matching method was used to analyze the pressure waveform. In the X-axis scan, we found that the arterial diameter changed waveform (ADCW and the pressure waveform would change from small to large and then back to small again when the sensor was moved across the radial artery. In the Z-axis scan, we also found that the ADCW and the pressure waveform would change from small to large and then back to small again when the applied contact pressure continuously increased. Results In the X-axis scan, the template correlation coefficients of the left and right boundaries of the radial arterial width were 0.987 ± 0.016 and 0.978 ± 0.028, respectively. In the Z-axis scan, when the excessive contact pressure was more than 100 mm Hg, the template correlation was below 0.983. In applying force, when using the maximum amplitude as the criteria level, the lower contact pressure (r = 0.988 ± 0.004 was better than the higher contact pressure (r = 0.976 ± 0.012. Conclusions Although, the optimal detective position has to be close to the middle of the radial arterial, the pressure waveform also has a good completeness with

  2. A Time Domain Waveform for Testing General Relativity

    CERN Document Server

    Huwyler, Cédric; Jetzer, Philippe

    2014-01-01

    Gravitational-wave parameter estimation is only as good as the theory the waveform generation models are based upon. It is therefore crucial to test General Relativity (GR) once data becomes available. Many previous works, such as studies connected with the ppE framework by Yunes and Pretorius, rely on the stationary phase approximation (SPA) to model deviations from GR in the frequency domain. As Fast Fourier Transform algorithms have become considerably faster and in order to circumvent possible problems with the SPA, we test GR with corrected time domain waveforms instead of SPA waveforms. Since a considerable amount of work has been done already in the field using SPA waveforms, we establish a connection between leading-order-corrected waveforms in time and frequency domain, concentrating on phase-only corrected terms. In a Markov Chain Monte Carlo study, whose results are preliminary and will only be available later, we will assess the ability of the eLISA detector to measure deviations from GR for signa...

  3. Ocular pressure waveform reflects ventricular bigeminy and aortic insufficiency

    Directory of Open Access Journals (Sweden)

    Jean B Kassem

    2015-01-01

    Full Text Available Ocular pulse amplitude (OPA is defined as the difference between maximum and minimum intraocular pressure (IOP during a cardiac cycle. Average values of OPA range from 1 to 4 mmHg. The purpose of this investigation is to determine the source of an irregular IOP waveform with elevated OPA in a 48-year-old male. Ocular pressure waveforms had an unusual shape consistent with early ventricular contraction. With a normal IOP, OPA was 9 mmHg, which is extraordinarily high. The subject was examined by a cardiologist and was determined to be in ventricular bigeminy. In addition, he had bounding carotid pulses and echocardiogram confirmed aortic insufficiency. After replacement of the aortic valve, the bigeminy resolved and the ocular pulse waveform became regular in appearance with an OPA of 1.6-2.0 mmHg. The ocular pressure waveform is a direct reflection of hemodynamics. Evaluating this waveform may provide an additional opportunity for screening subjects for cardiovascular anomalies and arrhythmias.

  4. Breast ultrasound computed tomography using waveform inversion with source encoding

    Science.gov (United States)

    Wang, Kun; Matthews, Thomas; Anis, Fatima; Li, Cuiping; Duric, Neb; Anastasio, Mark A.

    2015-03-01

    Ultrasound computed tomography (USCT) holds great promise for improving the detection and management of breast cancer. Because they are based on the acoustic wave equation, waveform inversion-based reconstruction methods can produce images that possess improved spatial resolution properties over those produced by ray-based methods. However, waveform inversion methods are computationally demanding and have not been applied widely in USCT breast imaging. In this work, source encoding concepts are employed to develop an accelerated USCT reconstruction method that circumvents the large computational burden of conventional waveform inversion methods. This method, referred to as the waveform inversion with source encoding (WISE) method, encodes the measurement data using a random encoding vector and determines an estimate of the speed-of-sound distribution by solving a stochastic optimization problem by use of a stochastic gradient descent algorithm. Computer-simulation studies are conducted to demonstrate the use of the WISE method. Using a single graphics processing unit card, each iteration can be completed within 25 seconds for a 128 × 128 mm2 reconstruction region. The results suggest that the WISE method maintains the high spatial resolution of waveform inversion methods while significantly reducing the computational burden.

  5. Measuring religious faith in cancer patients: reliability and construct validity of the Santa Clara Strength of Religious Faith questionnaire.

    Science.gov (United States)

    Sherman, A C; Simonton, S; Adams, D C; Latif, U; Plante, T G; Burns, S K; Poling, T

    2001-01-01

    Growing attention has focused on associations between religious involvement and health outcomes for cancer patients. Unfortunately, research has been hampered by lack of measures suitable for use in oncology settings. This study examined the performance of one recently developed measure, the Santa Clara Strength of Religious Faith Questionnaire (SCSORF). Initial investigations with cancer patients in a bone marrow transplant program and with non-oncology patients yielded promising results. This study provided additional information about temporal stability and convergent validity. The measure was evaluated in two well-defined samples: (1) 95 breast cancer patients, and (2) 53 healthy young adults. Most of the cancer patients had recent diagnoses and localized or regional disease. In each sample, the instrument demonstrated high test-retest reliability (r's=0.82-0.93) and internal consistency (r's=0.95-0.97). It displayed strong correlations with measures of intrinsic religiosity (r's=0.67-0.82, p<0.0001), and moderate correlations with organizational religiosity (r's=0.61-069, p<0.0001), non-organizational religiosity (r's=0.52-0.55, p<0.0001), comfort from religion (r=0.58, p<0.0001), and ratings of self as religious (r=0.58, p<0.0001). Among cancer patients, scores were significantly associated with optimism (r=0.30, p<0.01), but not with openness of family communication about cancer or perceived social support. These data build on previous findings with cancer patients, and suggest that the SCSORF may be a useful measure of religious faith in oncology settings.

  6. Shaping the spectrum of random-phase radar waveforms

    Energy Technology Data Exchange (ETDEWEB)

    Doerry, Armin W.; Marquette, Brandeis

    2017-05-09

    The various technologies presented herein relate to generation of a desired waveform profile in the form of a spectrum of apparently random noise (e.g., white noise or colored noise), but with precise spectral characteristics. Hence, a waveform profile that could be readily determined (e.g., by a spoofing system) is effectively obscured. Obscuration is achieved by dividing the waveform into a series of chips, each with an assigned frequency, wherein the sequence of chips are subsequently randomized. Randomization can be a function of the application of a key to the chip sequence. During processing of the echo pulse, a copy of the randomized transmitted pulse is recovered or regenerated against which the received echo is correlated. Hence, with the echo energy range-compressed in this manner, it is possible to generate a radar image with precise impulse response.

  7. Stimulator with arbitrary waveform for auditory evoked potentials

    Energy Technology Data Exchange (ETDEWEB)

    Martins, H R; Romao, M; Placido, D; Provenzano, F; Tierra-Criollo, C J [Universidade Federal de Minas Gerais (UFMG), Departamento de Engenharia Eletrica (DEE), Nucleo de Estudos e Pesquisa em Engenharia Biomedica NEPEB, Av. Ant. Carlos, 6627, sala 2206, Pampulha, Belo Horizonte, MG, 31.270-901 (Brazil)

    2007-11-15

    The technological improvement helps many medical areas. The audiometric exams involving the auditory evoked potentials can make better diagnoses of auditory disorders. This paper proposes the development of a stimulator based on Digital Signal Processor. This stimulator is the first step of an auditory evoked potential system based on the ADSP-BF533 EZ KIT LITE (Analog Devices Company - USA). The stimulator can generate arbitrary waveform like Sine Waves, Modulated Amplitude, Pulses, Bursts and Pips. The waveforms are generated through a graphical interface programmed in C++ in which the user can define the parameters of the waveform. Furthermore, the user can set the exam parameters as number of stimuli, time with stimulation (Time ON) and time without stimulus (Time OFF). In future works will be implemented another parts of the system that includes the acquirement of electroencephalogram and signal processing to estimate and analyze the evoked potential.

  8. Fast evaluation of asymptotic waveforms from gravitational perturbations

    CERN Document Server

    Benedict, Alex G; Lau, Stephen R

    2012-01-01

    In the context of blackhole perturbation theory, we describe both exact evaluation of an asymptotic waveform from a time series recorded at a finite radial location and its numerical approximation. From the user's standpoint our technique is easy to implement, affords high accuracy, and works for both axial (Regge-Wheeler) and polar (Zerilli) sectors. Our focus is on the ease of implementation with publicly available numerical tables, either as part of an existing evolution code or a post-processing step. Nevertheless, we also present a thorough theoretical discussion of asymptotic waveform evaluation and radiation boundary conditions, which need not be understood by a user of our methods. In particular, we identify (both in the time and frequency domains) analytical asymptotic waveform evaluation kernels, and describe their approximation by techniques developed by Alpert, Greengard, and Hagstrom. This paper also presents new results on the evaluation of far-field signals for the ordinary (acoustic) wave equa...

  9. Schwarz waveform relaxation algorithm for heat equations with distributed delay

    Directory of Open Access Journals (Sweden)

    Wu Shu-Lin

    2016-01-01

    Full Text Available Heat equations with distributed delay are a class of mathematic models that has wide applications in many fields. Numerical computation plays an important role in the investigation of these equations, because the analytic solutions of partial differential equations with time delay are usually unavailable. On the other hand, duo to the delay property, numerical computation of these equations is time-consuming. To reduce the computation time, we analyze in this paper the Schwarz waveform relaxation algorithm with Robin transmission conditions. The Robin transmission conditions contain a free parameter, which has a significant effect on the convergence rate of the Schwarz waveform relaxation algorithm. Determining the Robin parameter is therefore one of the top-priority matters for the study of the Schwarz waveform relaxation algorithm. We provide new formula to fix the Robin parameter and we show numerically that the new Robin parameter is more efficient than the one proposed previously in the literature.

  10. Classification of Pulse Waveforms Using Edit Distance with Real Penalty

    Directory of Open Access Journals (Sweden)

    Zhang Dongyu

    2010-01-01

    Full Text Available Abstract Advances in sensor and signal processing techniques have provided effective tools for quantitative research in traditional Chinese pulse diagnosis (TCPD. Because of the inevitable intraclass variation of pulse patterns, the automatic classification of pulse waveforms has remained a difficult problem. In this paper, by referring to the edit distance with real penalty (ERP and the recent progress in -nearest neighbors (KNN classifiers, we propose two novel ERP-based KNN classifiers. Taking advantage of the metric property of ERP, we first develop an ERP-induced inner product and a Gaussian ERP kernel, then embed them into difference-weighted KNN classifiers, and finally develop two novel classifiers for pulse waveform classification. The experimental results show that the proposed classifiers are effective for accurate classification of pulse waveform.

  11. Model Waveform Accuracy Requirements for the $\\chi^2$ Discriminator

    CERN Document Server

    Lindblom, Lee

    2016-01-01

    This paper derives accuracy standards for model gravitational waveforms required to ensure proper use of the $\\chi^2$ discriminator test in gravitational wave (GW) data analysis. These standards are different from previously established requirements for detection and waveform parameter measurement based on signal-to-noise optimization. We present convenient formulae both for evaluating and interpreting the contribution of model errors to measured $\\chi^2$ values. Motivated by these formula, we also present an enhanced, complexified variant of the standard $\\chi^2$ statistic used in GW searches. While our results are not directly relevant to current searches (which use the $\\chi^2$ test only to veto signal candidates with extremely high $\\chi^2$ values), they could be useful in future GW searches and as figures of merit for model gravitational waveforms.

  12. A 10 tesla table-top controlled waveform magnet.

    Science.gov (United States)

    Roy Choudhury, Aditya N; Venkataraman, V

    2012-04-01

    Controlled waveform magnets (CWMs) are a class of pulsed magnets whose pulse shape with time can be programmed by the user. With a CWM, the user gains control not only over the magnitude of the field but also over its rate of change. In this work we present a table-top CWM, driven by a capacitor bank, capable of producing virtually any user-shaped magnetic field waveform up to 10 tesla. Insulated gate bipolar transistor chips have been paralleled to form the high current switch and paralleled chips of SiC Schottky diodes form the crowbar diode module. Sample controlled waveforms including flat-tops up to 10 tesla and some triangular magnetic field pulses have been successfully generated for 10-20 ms with a ripple <1%.

  13. Autocorrelation Properties of OFDM Timing Synchronization Waveforms Employing Pilot Subcarriers

    Directory of Open Access Journals (Sweden)

    Oktay Üreten

    2009-01-01

    Full Text Available We investigate the autocorrelation properties of timing synchronization waveforms that are generated by embedded frequency domain pilot tones in orthogonal frequency division multiplex (OFDM systems. The waveforms are composed by summing a selected number of OFDM subcarriers such that the autocorrelation function (ACF of the resulting time waveform has desirable sidelobe behavior. Analytical expressions for the periodic and aperiodic ACF sidelobe energy are derived. Sufficient conditions for minimum and maximum aperiodic ACF sidelobe energy for a given number of pilot tones are presented. Several useful properties of the pilot design problem, such as invariance under transformations and equivalence of complementary sets are demonstrated analytically. Pilot tone design discussion is expanded to the ACF sidelobe peak minimization problem by including various examples and simulation results obtained from a genetic search algorithm.

  14. Autocorrelation Properties of OFDM Timing Synchronization Waveforms Employing Pilot Subcarriers

    Directory of Open Access Journals (Sweden)

    Taşcıoğlu Selçuk

    2009-01-01

    Full Text Available Abstract We investigate the autocorrelation properties of timing synchronization waveforms that are generated by embedded frequency domain pilot tones in orthogonal frequency division multiplex (OFDM systems. The waveforms are composed by summing a selected number of OFDM subcarriers such that the autocorrelation function (ACF of the resulting time waveform has desirable sidelobe behavior. Analytical expressions for the periodic and aperiodic ACF sidelobe energy are derived. Sufficient conditions for minimum and maximum aperiodic ACF sidelobe energy for a given number of pilot tones are presented. Several useful properties of the pilot design problem, such as invariance under transformations and equivalence of complementary sets are demonstrated analytically. Pilot tone design discussion is expanded to the ACF sidelobe peak minimization problem by including various examples and simulation results obtained from a genetic search algorithm.

  15. Agile high resolution arbitrary waveform generator with jitterless frequency stepping

    Science.gov (United States)

    Reilly, Peter T. A.; Koizumi, Hideya

    2010-05-11

    Jitterless transition of the programmable clock waveform is generated employing a set of two coupled direct digital synthesis (DDS) circuits. The first phase accumulator in the first DDS circuit runs at least one cycle of a common reference clock for the DDS circuits ahead of the second phase accumulator in the second DDS circuit. As a phase transition through the beginning of a phase cycle is detected from the first phase accumulator, a first phase offset word and a second phase offset word for the first and second phase accumulators are calculated and loaded into the first and second DDS circuits. The programmable clock waveform is employed as a clock input for the RAM address controller. A well defined jitterless transition in frequency of the arbitrary waveform is provided which coincides with the beginning of the phase cycle of the DDS output signal from the second DDS circuit.

  16. Generating Correlated QPSK Waveforms By Exploiting Real Gaussian Random Variables

    KAUST Repository

    Jardak, Seifallah

    2012-11-01

    The design of waveforms with specified auto- and cross-correlation properties has a number of applications in multiple-input multiple-output (MIMO) radar, one of them is the desired transmit beampattern design. In this work, an algorithm is proposed to generate quadrature phase shift- keying (QPSK) waveforms with required cross-correlation properties using real Gaussian random-variables (RV’s). This work can be considered as the extension of what was presented in [1] to generate BPSK waveforms. This work will be extended for the generation of correlated higher-order phase shift-keying (PSK) and quadrature amplitude modulation (QAM) schemes that can better approximate the desired beampattern.

  17. Ultra-wideband noise radar based on optical waveform generation

    Science.gov (United States)

    Grodensky, Daniel; Kravitz, Daniel; Zadok, Avi

    2012-06-01

    A microwave-photonic, ultra-wideband (UWB) noise radar system is proposed and demonstrated. The system brings together photonic generation of UWB waveforms and fiber-optic distribution. The use of UWB noise provides high ranging resolution and better immunity to interception and jamming. Distribution over fibers allows for the separation the radar-operating personnel and equipment from the location of the front-end. The noise waveforms are generated using the amplified spontaneous emission that is associated with stimulated Brillouin scattering in a standard optical fiber, or with an erbium-doped fiber amplifier. Our experiments demonstrate a proof of concept for an integrated radar system, driven by optically generated UWB noise waveforms of more than 1 GHz bandwidth that are distributed over 10 km distance. The detection of concealed metallic object and the resolving of two targets with the anticipated ranging resolution are reported.

  18. Understanding Spiritual Care: The Faith-Hope-Love Model of Spiritual Wellness.

    Science.gov (United States)

    Christman, Sharon K; Mueller, Julia R

    Spiritual care has been associated with positive patient outcomes. Although nurses want to provide spiritual care, many have difficulty conceptualizing spiritual care outside of religion and religious activities. The Faith-Hope-Love Model of Spiritual Wellness, a theoretical model of spirituality and spiritual well-being, grounded in Christian theology and biblical text, can help nurses provide spiritual support to patients and families from multiple faith traditions or those without a faith background. Spirituality concepts are discussed, and description of how spirituality is related to finding meaning and purpose in life along with a summary of the spiritual needs identified from healthcare literature and the Bible, are provided.

  19. Comparing the Performance of Faith-Based and Government Schools in the Democratic Republic of Congo

    OpenAIRE

    Backiny-Yetna, Prospere; Wodon, Quentin

    2009-01-01

    This paper provides a comparative assessment of the market share, reach to the poor, and performance of faith-based and public schools in the Democratic Republic of Congo using data from the 2004-2005 "123" survey. More than two thirds of primary school students attend faith-based government-assisted schools. Both types of school cater to a similar population that is overwhelmingly poor. Faith-based schools perform slightly better at least in some dimensions than government schools, but the d...

  20. Comparing the Performance of Faith-Based and Government Schools in the Democratic Republic of Congo

    OpenAIRE

    Backiny-Yetna, Prospere; Wodon, Quentin

    2009-01-01

    This paper provides a comparative assessment of the market share, reach to the poor, and performance of faith-based and public schools in the Democratic Republic of Congo using data from the 2004-2005 "123" survey. More than two thirds of primary school students attend faith-based government-assisted schools. Both types of school cater to a similar population that is overwhelmingly poor. Faith-based schools perform slightly better at least in some dimensions than government schools, but the ...

  1. Design of output voltage waveform on magnetic encoder

    Energy Technology Data Exchange (ETDEWEB)

    Shi Yu E-mail: shiyu_aaa@163.com; Zhang Huaiwu; Jiang Xiangdong; Wen Qiye; Han Baoshan

    2004-11-01

    A novel design model based on slant multi-phase filter (SMPF) theory is presented. By the theory nth harmonic voltage (n=2nd, 3rd and 4th...(V)) can be reduced easily. Magnetic encoder with sinusoidal output voltage waveform has been developed and sinusoidal output waveform can be easily improved. The minimum of distortion factor was observed when the difference of slant phase is 2{pi}3. This result agrees with SMPF theory value {phi}=4.904 deg. (p=0.8 mm, l=3 mm, {delta}{theta}=2{pi}3]. This result can be widely used in magnetoresistive sensor fields.

  2. Efficient 2d full waveform inversion using Fortran coarray

    Science.gov (United States)

    Ryu, Donghyun; Kim, ahreum; Ha, Wansoo

    2016-04-01

    We developed a time-domain seismic inversion program using the coarray feature of the Fortran 2008 standard to parallelize the algorithm. We converted a 2d acoustic parallel full waveform inversion program with Message Passing Interface (MPI) to a coarray program and examined performance of the two inversion programs. The results show that the speed of the waveform inversion program using the coarray is slightly faster than that of the MPI version. The standard coarray lacks features for collective communication; however, it can be improved in following standards since it is introduced recently. The parallel algorithm can be applied for 3D seismic data processing.

  3. Krylov-subspace acceleration of time periodic waveform relaxation

    Energy Technology Data Exchange (ETDEWEB)

    Lumsdaine, A. [Univ. of Notre Dame, IN (United States)

    1994-12-31

    In this paper the author uses Krylov-subspace techniques to accelerate the convergence of waveform relaxation applied to solving systems of first order time periodic ordinary differential equations. He considers the problem in the frequency domain and presents frequency dependent waveform GMRES (FDWGMRES), a member of a new class of frequency dependent Krylov-subspace techniques. FDWGMRES exhibits many desirable properties, including finite termination independent of the number of timesteps and, for certain problems, a convergence rate which is bounded from above by the convergence rate of GMRES applied to the static matrix problem corresponding to the linear time-invariant ODE.

  4. A Novel Memory Compress Algorithm for Arbitrary Waveform Generator

    Institute of Scientific and Technical Information of China (English)

    吕铁良; 仇玉林

    2000-01-01

    A memory compress algorithm for 12-bit Arbitrary Waveform Generator (AWG) is presented and optimized. It can compress waveform memory for a sinusoid to 16× 13hits with a Spurious-Free Dynamic Range (SFDR) 90.7dBc (1/1890 of uncompressed memory at the same SFDR) and to 8× 12bits with a SFDR 79dBc. Its hardware cost is six adders and two multipliers. Exploiting this memory compress technique makes it possible to build a high performance AWG on a chip.

  5. Partitioned Waveform Inversion Applied to Eurasia and Northern Africa

    Energy Technology Data Exchange (ETDEWEB)

    bedle, H; Matzel, E; Flanagan, M

    2006-07-27

    This report summarizes the data analysis achieved during Heather Bedle's eleven-week Technical Scholar internship at Lawrence Livermore National Labs during the early summer 2006. The work completed during this internship resulted in constraints on the crustal and upper mantle S-velocity structure in Northern Africa, the Mediterranean, the Middle East, and Europe, through the fitting of regional waveform data. This data extends current raypath coverage and will be included in a joint inversion along with data from surface wave group velocity measurements, S and P teleseismic arrival time data, and receiver function data to create an improved velocity model of the upper mantle in this region. The tectonic structure of the North African/Mediterranean/Europe/Middle Eastern study region is extremely heterogeneous. This region consists of, among others, stable cratons and platforms such as the West Africa Craton, and Baltica in Northern Europe; oceanic subduction zones throughout the Mediterranean Sea where the African and Eurasian plate collide; regions of continental collision as the Arabian Plate moves northward into the Turkish Plate; and rifting in the Red Sea, separating the Arabian and Nubian shields. With such diverse tectonic structures, many of the waveforms were difficult to fit. This is not unexpected as the waveforms are fit using an averaged structure. In many cases the raypaths encounter several tectonic features, complicating the waveform, and making it hard for the software to converge on a 1D average structure. Overall, the quality of the waveform data was average, with roughly 30% of the waveforms being discarded due to excessive noise that interfered with the frequency ranges of interest. An inversion for the 3D S-velocity structure of this region was also performed following the methodology of Partitioned Waveform Inversion (Nolet, 1990; Van der Lee and Nolet, 1997). The addition of the newly fit waveforms drastically extends the range of the

  6. Full waveform modelling and misfit calculation using the VERCE platform

    Science.gov (United States)

    Garth, Thomas; Spinuso, Alessandro; Casarotti, Emanuele; Magnoni, Federica; Krischner, Lion; Igel, Heiner; Schwichtenberg, Horst; Frank, Anton; Vilotte, Jean-Pierre; Rietbrock, Andreas

    2016-04-01

    In recent years the increasing resolution of seismic imagining by full waveform inversion has opened new research perspectives and practices. These methods rely on harnessing the computational power of large supercomputers and new storage capabilities, to run large parallel codes to simulate the seismic wave field in three-dimensional geological settings. The VERCE platform is designed to make these full waveform techniques accessible to a far wider spectrum of the seismological community. VERCE empowers a broad base of seismology researchers to harvest the new opportunities provided by well-established high-performance wave simulation codes such as SPECFEM3D. It meets a range of seismic research needs by eliminating the technical difficulties associated with using these codes, allowing users to focus on their research questions. VERCE delivers this power to seismologists through its science gateway, supporting wave simulation codes on each of the provided computing resources. Users can design their waveform simulation scenarios making use of a library of pre-loaded meshes and velocity models, and services for selecting earthquake focal mechanisms, seismic stations and recorded waveforms from existing catalogues, such as the GCMT catalogue, and FDSN data sources. They can also supply their own mesh, velocity model, earthquake catalogue and seismic observations. They can submit the simulations onto different computing resources, where VERCE provides codes that are tuned and supported for those resources. The simulations can currently be run on a range of European supercomputers in the PRACE network, including superMUC at LRZ, GALILEO at CINECA and on selected resources like Drachenfels at SCAI and within the EGI network. The gateway automates and looks after all these stages, but supplies seismologists with a provenance system that allows them to manage a large series of runs, review progress, and explore the results. The platform automates misfit analysis between

  7. Obesity discourse and the crisis of faith in disciplinary technology

    Directory of Open Access Journals (Sweden)

    Michael Gard

    2007-01-01

    Full Text Available According to Kirk (1998 (following Foucault a shift in corporeal power has been underway since the late 18th century in many ‘western’ countries, from an external form of power and locus of control to an internal form and locus. In light of the increased volume of discourse around the alleged obesity crisis (Gard & Wright 2005 we revisit and attempt to update Kirk’s thesis about the regulation of bodies in schools; is the widespread concern about an obesity crisis producing new ways of managing and disciplining children’s bodies? We explore in some detail a case study of curriculum development in Health and Physical Education in Ontario, Canada where we argue that the grades 1–8 syllabus trades the productive compliance and liberal individualism of previous eras for a new layering of physical education discourse and the production of cheerfully courteous and responsible individuals. We complete this analysis by asking whether this curriculum development in an era of obesity discourse signals a crisis of faith in disciplinary technology. We end by noting the need for the retention of spaces within school physical education where young people can question assumptions about corporeality.

  8. Faithful conditional quantum state transfer between weakly coupled qubits

    Science.gov (United States)

    Miková, M.; Straka, I.; Mičuda, M.; Krčmarský, V.; Dušek, M.; Ježek, M.; Fiurášek, J.; Filip, R.

    2016-08-01

    One of the strengths of quantum information theory is that it can treat quantum states without referring to their particular physical representation. In principle, quantum states can be therefore fully swapped between various quantum systems by their mutual interaction and this quantum state transfer is crucial for many quantum communication and information processing tasks. In practice, however, the achievable interaction time and strength are often limited by decoherence. Here we propose and experimentally demonstrate a procedure for faithful quantum state transfer between two weakly interacting qubits. Our scheme enables a probabilistic yet perfect unidirectional transfer of an arbitrary unknown state of a source qubit onto a target qubit prepared initially in a known state. The transfer is achieved by a combination of a suitable measurement of the source qubit and quantum filtering on the target qubit depending on the outcome of measurement on the source qubit. We experimentally verify feasibility and robustness of the transfer using a linear optical setup with qubits encoded into polarization states of single photons.

  9. 'Ein furtrefflicher Munch': Luther and the Living out of Faith

    DEFF Research Database (Denmark)

    Pedersen, Else Marie Wiberg

    2007-01-01

    This article treats of main points in Luther's less known treaty on monastic vows, "De votis monasticis iudicium", from 1521. It is demonstrated how Luther bases his ideas on Bernard of Clairvaux's understanding of monastic life as a Christ-formed life in the faith in God. Luther values that also...... between "praecepta" and "consilia" (Bernard does not know such a differentiation, post his time; and Luther sharply confronts the arrogance he finds in such an epistemology). On the other hand, they have very different views on the raison d'être of monasticism. Bernard, who lives in a flourishing yet...... turbulent Europe of the11th century,  sees the monastery as a sublime greenhouse for growing a social and peaceful life in love of neighbour, which ought to be the ideal of all human life. Luther, living 400 years later, experiences a quite different ecclesial and monastic life, where he witnesses abuse...

  10. Prion pathogenesis is faithfully reproduced in cerebellar organotypic slice cultures.

    Directory of Open Access Journals (Sweden)

    Jeppe Falsig

    Full Text Available Prions cause neurodegeneration in vivo, yet prion-infected cultured cells do not show cytotoxicity. This has hampered mechanistic studies of prion-induced neurodegeneration. Here we report that prion-infected cultured organotypic cerebellar slices (COCS experienced progressive spongiform neurodegeneration closely reproducing prion disease, with three different prion strains giving rise to three distinct patterns of prion protein deposition. Neurodegeneration did not occur when PrP was genetically removed from neurons, and a comprehensive pharmacological screen indicated that neurodegeneration was abrogated by compounds known to antagonize prion replication. Prion infection of COCS and mice led to enhanced fodrin cleavage, suggesting the involvement of calpains or caspases in pathogenesis. Accordingly, neurotoxicity and fodrin cleavage were prevented by calpain inhibitors but not by caspase inhibitors, whereas prion replication proceeded unimpeded. Hence calpain inhibition can uncouple prion replication from its neurotoxic sequelae. These data validate COCS as a powerful model system that faithfully reproduces most morphological hallmarks of prion infections. The exquisite accessibility of COCS to pharmacological manipulations was instrumental in recognizing the role of calpains in neurotoxicity, and significantly extends the collection of tools necessary for rigorously dissecting prion pathogenesis.

  11. Islam, brain death, and transplantation: culture, faith, and jurisprudence.

    Science.gov (United States)

    Arbour, Richard; AlGhamdi, Hanan Mesfer Saad; Peters, Linda

    2012-01-01

    A significant gap exists between availability of organs for transplant and patients with end-stage organ failure for whom organ transplantation is the last treatment option. Reasons for this mismatch include inadequate approach to potential donor families and donor loss as a result of refractory cardiopulmonary instability during and after brainstem herniation. Other reasons include inadequate cultural competence and sensitivity when communicating with potential donor families. Clinicians may not have an understanding of the cultural and religious perspectives of Muslim families of critically ill patients who may be approached about brain death and organ donation. This review analyzes Islamic cultural and religious perspectives on organ donation, transplantation, and brain death, including faith-based directives from Islamic religious authorities, definitions of death in Islam, and communication strategies when discussing brain death and organ donation with Muslim families. Optimal family care and communication are highlighted using case studies and backgrounds illustrating barriers and approaches with Muslim families in the United States and in the Kingdom of Saudi Arabia that can improve cultural competence and family care as well as increase organ availability within the Muslim population and beyond.

  12. Science and Faith: Discussing Astronomy Research with Religious Audiences

    Science.gov (United States)

    Koekemoer, Anton M.

    2006-12-01

    An important component of our outreach as research astronomers involves interaction with the religious community. From my personal perspective, being an active research astronomer who is also a practicing Christian, I am sometimes invited to present the latest astronomical research to church audiences and other religious groups; belonging to both communities thereby provides a valuable means of contributing to the dialogue between science and religion. These opportunities can be used to explain that science and religion are not necessarily in conflict but can be considered to be quite complementary. For instance, an important aspect of religion deals with the purpose of our existence, while science is more focussed on providing physical explanations for what we observe in the world, using a well-defined scientific process. Hence, religious believers need not necessarily abandon their faith in order to accept mainstream scientific research; these address very different and complementary aspects of our existence. Recent ideas such as Intelligent Design attempt to address the scientific method, but do not address the ultimate religious question of purpose and do not contribute towards reconciling science and religion in this sense. Ultimately, every individual arrives at their own understanding of this rather complex interplay; I will present some personal reflections on general approaches for discussing mainstream astronomical research with religious audiences, aimed at helping to advance the dialogue between religion and science in general.

  13. Kant’s Prudential Theory of Religion: The Necessity of Historical Faith for Moral Empowerment

    Directory of Open Access Journals (Sweden)

    Stephen R. Palmquist

    2015-06-01

    Full Text Available Given his emphasis on deontological ethics, Kant is rarely regarded as a friend of prudence. For example, he is often interpreted as an opponent of so-called “historical faiths” (i.e., empirical religious traditions. What typically goes unnoticed is that in explaining the legitimate (indeed, indispensable role of historical faiths in the moral development of the human race, Kant appeals explicitly to their prudential status. A careful examination of Kant’s main references to prudence demonstrates that the prudential status of historical faith is the key to understanding both its limitations (as merely the vehicle of true religion, not its essential core and its real value (as a necessary means of moral empowerment. The wise person adopts some form of historical faith, because to abandon any and all prudential appeals to a faith-based vehicle for morality would render the goal of living a good life virtually impossible for embodied beings to achieve.

  14. "Faithful Servant of the Kingdom": A Hymn to St. Thomas More

    National Research Council Canada - National Science Library

    Smedberg, Benjamin

    2002-01-01

    Presents the sheet music for "Faithful Servant of the Kingdom," a hymn composed by Brother Andrew Hofer, a seminarian at the Dominican House of Studies in Washington, DC, that pays tribute to St. Thomas More...

  15. Restoring trust in corporate directors: the Disney standard and the "new" good faith

    National Research Council Canada - National Science Library

    Duggin, Sarah Helene; Goldman, Stephen M

    2006-01-01

    The purpose of this article is to explore the parameters and potential impact of the good faith standard articulated by the Delaware Supreme Court in In re Walt Disney Company Derivative Legislation (Disney V...

  16. Sonar waveforms for reverberation rejection, part I: theory

    NARCIS (Netherlands)

    Doist, Y.; Deruz, L.; Been, R.

    2000-01-01

    The influence of the waveform of the transmitted signal on the signal to reverberation ratio induced at the processing output of a moving sonar array is analysed on an theoretical basis. Three main classes of signals are analysed: wide band signals with a flat spectrum (for instance FM signals), con

  17. Waveform Diversity and Design for Interoperating Radar Systems

    Science.gov (United States)

    2013-01-01

    University Di Pisa Department Di Ingegneria Dell Informazione Elettronica, Informatica , Telecomunicazioni Via Girolamo Caruso 16 Pisa, Italy 56122...NUMBER 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) University Di Pisa Department Di Ingegneria Dell Informazione Elettronica, Informatica ...DIPARTIMENTO DI INGEGNERIA DELL’INFORMAZIONE ELETTRONICA, INFORMATICA , TELECOMUNICAZIONI WAVEFORM DIVERSITY AND DESIGN FOR INTEROPERATING

  18. On the Contribution of Head Waves to Full Waveform Inversion

    NARCIS (Netherlands)

    Kazei, V.V.; Ponomarenko, A.V.; Troyan, V.N.; Kashtan, B.M.; Mulder, W.A.

    2012-01-01

    Full waveform inversion suffers from local minima, due to a lack of low frequencies in the data. A reflector below the zone of interest may, however, help in recovering the long-wavelength components of a velocity perturbation, as demonstrated in a paper by Mora. With the Born approximation for the

  19. A nonlinear approach of elastic reflection waveform inversion

    KAUST Repository

    Guo, Qiang

    2016-09-06

    Elastic full waveform inversion (EFWI) embodies the original intention of waveform inversion at its inception as it is a better representation of the mostly solid Earth. However, compared with the acoustic P-wave assumption, EFWI for P- and S-wave velocities using multi-component data admitted mixed results. Full waveform inversion (FWI) is a highly nonlinear problem and this nonlinearity only increases under the elastic assumption. Reflection waveform inversion (RWI) can mitigate the nonlinearity by relying on transmissions from reflections focused on inverting low wavenumber components of the model. In our elastic endeavor, we split the P- and S-wave velocities into low wavenumber and perturbation components and propose a nonlinear approach to invert for both of them. The new optimization problem is built on an objective function that depends on both background and perturbation models. We utilize an equivalent stress source based on the model perturbation to generate reflection instead of demigrating from an image, which is applied in conventional RWI. Application on a slice of an ocean-bottom data shows that our method can efficiently update the low wavenumber parts of the model, but more so, obtain perturbations that can be added to the low wavenumbers for a high resolution output.

  20. Categorisation of full waveform data provided by laser scanning devices

    Science.gov (United States)

    Ullrich, Andreas; Pfennigbauer, Martin

    2011-11-01

    In 2004, a laser scanner device for commercial airborne laser scanning applications, the RIEGL LMS-Q560, was introduced to the market, making use of a radical alternative approach to the traditional analogue signal detection and processing schemes found in LIDAR instruments so far: digitizing the echo signals received by the instrument for every laser pulse and analysing these echo signals off-line in a so-called full waveform analysis in order to retrieve almost all information contained in the echo signal using transparent algorithms adaptable to specific applications. In the field of laser scanning the somewhat unspecific term "full waveform data" has since been established. We attempt a categorisation of the different types of the full waveform data found in the market. We discuss the challenges in echo digitization and waveform analysis from an instrument designer's point of view and we will address the benefits to be gained by using this technique, especially with respect to the so-called multi-target capability of pulsed time-of-flight LIDAR instruments.

  1. Augmented kludge waveforms for detecting extreme-mass-ratio inspirals

    Science.gov (United States)

    Chua, Alvin J. K.; Moore, Christopher J.; Gair, Jonathan R.

    2017-08-01

    The extreme-mass-ratio inspirals (EMRIs) of stellar-mass compact objects into massive black holes are an important class of source for the future space-based gravitational-wave detector LISA. Detecting signals from EMRIs will require waveform models that are both accurate and computationally efficient. In this paper, we present the latest implementation of an augmented analytic kludge (AAK) model, publicly available at https://github.com/alvincjk/EMRI_Kludge_Suite as part of an EMRI waveform software suite. This version of the AAK model has improved accuracy compared to its predecessors, with two-month waveform overlaps against a more accurate fiducial model exceeding 0.97 for a generic range of sources; it also generates waveforms 5-15 times faster than the fiducial model. The AAK model is well suited for scoping out data analysis issues in the upcoming round of mock LISA data challenges. A simple analytic argument shows that it might even be viable for detecting EMRIs with LISA through a semicoherent template bank method, while the use of the original analytic kludge in the same approach will result in around 90% fewer detections.

  2. Synchronous Generator Model Parameter Estimation Based on Noisy Dynamic Waveforms

    Science.gov (United States)

    Berhausen, Sebastian; Paszek, Stefan

    2016-01-01

    In recent years, there have occurred system failures in many power systems all over the world. They have resulted in a lack of power supply to a large number of recipients. To minimize the risk of occurrence of power failures, it is necessary to perform multivariate investigations, including simulations, of power system operating conditions. To conduct reliable simulations, the current base of parameters of the models of generating units, containing the models of synchronous generators, is necessary. In the paper, there is presented a method for parameter estimation of a synchronous generator nonlinear model based on the analysis of selected transient waveforms caused by introducing a disturbance (in the form of a pseudorandom signal) in the generator voltage regulation channel. The parameter estimation was performed by minimizing the objective function defined as a mean square error for deviations between the measurement waveforms and the waveforms calculated based on the generator mathematical model. A hybrid algorithm was used for the minimization of the objective function. In the paper, there is described a filter system used for filtering the noisy measurement waveforms. The calculation results of the model of a 44 kW synchronous generator installed on a laboratory stand of the Institute of Electrical Engineering and Computer Science of the Silesian University of Technology are also given. The presented estimation method can be successfully applied to parameter estimation of different models of high-power synchronous generators operating in a power system.

  3. Notched spectrum: from probing waveforms to receive filters

    Science.gov (United States)

    Jiang, Yi; Gianelli, Christopher D.

    2013-05-01

    The increasing demand for wireless data services and communications is expanding the frequency footprint of both civilian and military wireless networks, and hence encroaches upon spectrum traditionally reserved for radar systems. To maximize spectral efficiency, it is desirable for a modern radar system to use waveforms with the ability to fit into tightly controlled spectral regions, which requires the formation of nulls with required notching levels on prescribed frequency stop-bands. Additionally, the waveform should posses a low peak-to-average ratio (PAR), and have good auto-correlation performance. In this work, we propose a novel method for the design of such a waveform using alternating convex optimization. The core module of the proposed algorithm is a fast Fourier transform, which makes the algorithm quite efficient and can handle waveform designs with up to 105 samples. Moreover, our algorithm can achieve a flexible tradeoff between PAR and reduced pass band ripple. A simple application in synthetic aperture radar is considered to highlight the performance of the design algorithm.

  4. Automated microseismic event location using Master-Event Waveform Stacking

    Science.gov (United States)

    Grigoli, Francesco; Cesca, Simone; Krieger, Lars; Kriegerowski, Marius; Gammaldi, Sergio; Horalek, Josef; Priolo, Enrico; Dahm, Torsten

    2016-05-01

    Accurate and automated locations of microseismic events are desirable for many seismological and industrial applications. The analysis of microseismicity is particularly challenging because of weak seismic signals with low signal-to-noise ratio. Traditional location approaches rely on automated picking, based on individual seismograms, and make no use of the coherency information between signals at different stations. This strong limitation has been overcome by full-waveform location methods, which exploit the coherency of waveforms at different stations and improve the location robustness even in presence of noise. However, the performance of these methods strongly depend on the accuracy of the adopted velocity model, which is often quite rough; inaccurate models result in large location errors. We present an improved waveform stacking location method based on source-specific station corrections. Our method inherits the advantages of full-waveform location methods while strongly mitigating the dependency on the accuracy of the velocity model. With this approach the influence of an inaccurate velocity model on the results is restricted to the estimation of travel times solely within the seismogenic volume, but not for the entire source-receiver path. We finally successfully applied our new method to a realistic synthetic dataset as well as real data.

  5. A marked point process for modeling lidar waveforms.

    Science.gov (United States)

    Mallet, Clément; Lafarge, Florent; Roux, Michel; Soergel, Uwe; Bretar, Frédéric; Heipke, Christian

    2010-12-01

    Lidar waveforms are 1-D signals representing a train of echoes caused by reflections at different targets. Modeling these echoes with the appropriate parametric function is useful to retrieve information about the physical characteristics of the targets. This paper presents a new probabilistic model based upon a marked point process which reconstructs the echoes from recorded discrete waveforms as a sequence of parametric curves. Such an approach allows to fit each mode of a waveform with the most suitable function and to deal with both, symmetric and asymmetric, echoes. The model takes into account a data term, which measures the coherence between the models and the waveforms, and a regularization term, which introduces prior knowledge on the reconstructed signal. The exploration of the associated configuration space is performed by a reversible jump Markov chain Monte Carlo (RJMCMC) sampler coupled with simulated annealing. Experiments with different kinds of lidar signals, especially from urban scenes, show the high potential of the proposed approach. To further demonstrate the advantages of the suggested method, actual laser scans are classified and the results are reported.

  6. Multisource waveform inversion of marine streamer data using normalized wavefield

    KAUST Repository

    Choi, Yun Seok

    2013-09-01

    Multisource full-waveform inversion based on the L1- and L2-norm objective functions cannot be applied to marine streamer data because it does not take into account the unmatched acquisition geometries between the observed and modeled data. To apply multisource full-waveform inversion to marine streamer data, we construct the L1- and L2-norm objective functions using the normalized wavefield. The new residual seismograms obtained from the L1- and L2-norms using the normalized wavefield mitigate the problem of unmatched acquisition geometries, which enables multisource full-waveform inversion to work with marine streamer data. In the new approaches using the normalized wavefield, we used the back-propagation algorithm based on the adjoint-state technique to efficiently calculate the gradients of the objective functions. Numerical examples showed that multisource full-waveform inversion using the normalized wavefield yields much better convergence for marine streamer data than conventional approaches. © 2013 Society of Exploration Geophysicists.

  7. Applying the Moment Distance Framework to LiDAR Waveforms

    Science.gov (United States)

    Salas, E. L.; Aguilar-Amuchastegui, N.; Henebry, G. M.

    2010-12-01

    In the past decade or so, there have only been limited approaches formulated for the analysis of waveform LiDAR data. We illustrate how the Moment Distance (MD) framework can characterize the shape of the LiDAR waveforms using simple, computationally fast, geometric operations. We assess the relationship of the MD metrics to some key waveform landmarks - such as locations of peaks, power of returns, and pseudo-heights - using LVIS datasets acquired over a tropical forest in La Selva, Costa Rica in 1998 and 2005. We also apply the MD framework to 2003 LVIS data from Howland Forest, Maine. We also explore the effects of noise on the MD Index (MDI). Our results reveal that the MDI can capture important dynamics in canopy structure. Movement in the location of the peaks is detected by shifts in the MDI. Because this new approach responds to waveform shape, it is more sensitive to changes of location of peak returns than to the power of the return. Results also suggest a positive relationship between the MDI and the canopy pseudo-height.

  8. Structural similarity regularization scheme for multiparameter seismic full waveform inversion

    NARCIS (Netherlands)

    Li, M.; Liang, L.; Abubakar, A.; Van den Berg, P.M.

    2013-01-01

    We introduce a new regularization scheme for multiparameter seismic full-waveform inversion (FWI). Using this scheme, we can constrain spatial variations of parameters which are having a weak sensitivity with the one that having a good sensitivity to the measurement, assuming that these parameters h

  9. On the potential of OFDM enhancements as 5G waveforms

    DEFF Research Database (Denmark)

    Berardinelli, Gilberto; Pajukoski, Kari; Lähetkangas, Eeva

    2014-01-01

    Division Multiplexing (OFDM) and its recently proposed enhancements as 5G waveforms, mainly focusing on their capability to cope with our requirements. Significant focus is given to the novel zero-tail paradigm, which allows boosting the OFDM flexibility while circumventing demerits such as poor spectral...

  10. Faith-Based Diplomacy: A Pathway to Marginalizing Al-Qa’ida

    Science.gov (United States)

    2013-03-01

    al-Qa`ida organization, including its theology and ideology; and, third, recommending faith-based policy initiatives, including the advocacy for...Security Strategy; second, characterizing the current global nature of the al-Qa`ida organization, including its theology and ideology; and, third...nature of the al-Qa`ida organization, including its theology and ideology; and, third, recommending faith-based policy initiatives to sideline al-Qa`ida

  11. Analysis of LFM-waveform Libraries for Cognitive Tracking Maneuvering Targets

    Directory of Open Access Journals (Sweden)

    Wang Hongyan

    2016-01-01

    Full Text Available Based on the idea of the waveform agility in cognitive radars,the waveform libraries for maneuvering target tracking are discussed. LFM-waveform libraries are designed according to different combinations of chirp parameters and FrFT rotation angles. By applying the interact multiple model (IMM algorithm in tracking maneuvering targets, transmitted waveform is called real time from the LFM-waveform libraries. The waveforms are selected from the library according to the criterion of maximum mutual information between the current state of knowledge of the model and the measurement. Simulation results show that waveform library containing certain amount LFM-waveforms can improve the performance of cognitive tracking radar.

  12. GLAS/ICESat L1B Global Waveform-based Range Corrections Data V033

    Data.gov (United States)

    National Aeronautics and Space Administration — The level 1B waveform parameterization data will contain waveform-based range corrections and surface characteristics at the full 40 per second resolution. Data...

  13. Non-sinusoidal waveform effects on heat transfer performance in pulsating pipe flow

    Directory of Open Access Journals (Sweden)

    R. Roslan

    2016-12-01

    Full Text Available In the present paper, an unsteady motion of fluid flow in a pulsating pipe is studied to determine the effect of non-sinusoidal waveforms on the heat transfer performance. Three non-sinusoidal waveforms, namely sawtooth, square and triangular waveforms have been considered. Explicit analytical expressions for a periodic laminar flow describing the flow and heat transfer at small and large times with sawtooth and square pressure waveforms have been derived using Bessel transform technique. The heat transfer performance of periodic flow at sawtooth and square pressure waveforms has been compared with the published result for triangular waveform [1]. The temperature performance for a triangular waveform pressure is very different from the sawtooth and square pressure waveforms.

  14. Ultralow-velocity zone geometries resolved by multidimensional waveform modelling

    Science.gov (United States)

    Vanacore, E. A.; Rost, S.; Thorne, M. S.

    2016-07-01

    Ultralow-velocity zones (ULVZs) are thin patches of material with strongly reduced seismic wave speeds situated on top of the core-mantle boundary (CMB). A common phase used to detect ULVZs is SPdKS (SKPdS), an SKS wave with a short diffracted P leg along the CMB. Most previous efforts have examined ULVZ properties using 1-D waveform modelling approaches. We present waveform modelling results using the 2.5-D finite-difference algorithm PSVaxi allowing us better insight into ULVZ structure and location. We characterize ULVZ waveforms based on ULVZ elastic properties, shape and position along the SPdKS ray path. In particular, we vary the ULVZ location (e.g. source or receiver side), ULVZ topographical profiles (e.g. boxcar, trapezoidal or Gaussian) and ULVZ lateral scale along great circle path (2.5°, 5°, 10°). We observe several waveform effects absent in 1-D ULVZ models and show evidence for waveform effects allowing the differentiation between source and receiver side ULVZs. Early inception of the SPdKS/SKPdS phase is difficult to detect for receiver-side ULVZs with maximum shifts in SKPdS initiation of ˜3° in epicentral distance, whereas source-side ULVZs produce maximum shifts of SPdKS initiation of ˜5°, allowing clear separation of source- versus receiver-side structure. We present a case study using data from up to 300 broad-band stations in Turkey recorded between 2005 and 2010. We observe a previously undetected ULVZ in the southern Atlantic Ocean region centred near 45°S, 12.5°W, with a lateral scale of ˜3°, VP reduction of 10 per cent, VS reduction of 30 per cent and density increase of 10 per cent relative to PREM.

  15. Test Waveform Applications for JPL STRS Operating Environment

    Science.gov (United States)

    Lux, James P.; Peters, Kenneth J.; Taylor, Gregory H.; Lang, Minh; Stern, Ryan A.; Duncan, Courtney B.

    2013-01-01

    This software demonstrates use of the JPL Space Telecommunications Radio System (STRS) Operating Environment (OE), tests APIs (application programming interfaces) presented by JPL STRS OE, and allows for basic testing of the underlying hardware platform. This software uses the JPL STRS Operating Environment ["JPL Space Tele com - munications Rad io System Operating Environment,"(NPO-4776) NASA Tech Briefs, commercial edition, Vol. 37, No. 1 (January 2013), p. 47] to interact with the JPL-SDR Software Defined Radio developed for the CoNNeCT (COmmunications, Navigation, and Networking rEconfigurable Testbed) Project as part of the SCaN Testbed installed on the International Space Station (ISS). These are the first applications that are compliant with the new NASA STRS Architecture Standard. Several example waveform applications are provided to demonstrate use of the JPL STRS OE for the JPL-SDR platform used for the CoNNeCT Project. The waveforms provide a simple digitizer and playback capability for the SBand RF slice, and a simple digitizer for the GPS slice [CoNNeCT Global Positioning System RF Module, (NPO-47764) NASA Tech Briefs, commercial edition, Vol. 36, No. 3 (March 2012), p. 36]. These waveforms may be used for hardware test, as well as for on-orbit or laboratory checkout. Additional example waveforms implement SpaceWire and timer modules, which can be used for time transfer and demonstration of communication between the two Xilinx FPGAs in the JPLSDR. The waveforms are also compatible with ground-based use of the JPL STRS OE on radio breadboards and Linux.

  16. Effects of waveform model systematics on the interpretation of GW150914

    OpenAIRE

    2016-01-01

    Parameter estimates of GW150914 were obtained using Bayesian inference, based on three semi-analytic waveform models for binary black hole coalescences. These waveform models differ from each other in their treatment of black hole spins, and all three models make some simplifying assumptions, notably to neglect sub-dominant waveform harmonic modes and orbital eccentricity. Furthermore, while the models are calibrated to agree with waveforms obtained by full numerical solutions of Einstein's e...

  17. Assessment of waveform control method for mitigation of low-frequency current ripple

    OpenAIRE

    Zhu, GR; Wang, HR; Xiao, CY; Kang, Y.; Tan, SC

    2013-01-01

    Waveform control method can mitigate such a low-frequency ripple current being drawn from the DC distribution while the DC distribution system delivers AC power to the load through a differential inverter. Assessment on the waveform control method and comparative study between with and without waveform control method are proposed in this paper1. Experimental results are provided to explain the operation and showcase the performance between with and without the waveform control method. Results...

  18. Joint Filter and Waveform Design for Radar STAP in Signal Dependent Interference

    OpenAIRE

    Setlur, Pawan; Rangaswamy, Muralidhar

    2015-01-01

    Waveform design is a pivotal component of the fully adaptive radar construct. In this paper we consider waveform design for radar space time adaptive processing (STAP), accounting for the waveform dependence of the clutter correlation matrix. Due to this dependence, in general, the joint problem of receiver filter optimization and radar waveform design becomes an intractable, non-convex optimization problem, Nevertheless, it is however shown to be individually convex either in the filter or i...

  19. Waveform library for chinch bugs (Hemiptera: Heteroptera: Blissidae): Characterization of Electrical Penetration Graph (EPG) waveforms at multiple input impedances

    Science.gov (United States)

    Electrical penetration graph (EPG) monitoring has been used extensively to elucidate mechanisms of resistance in plants to insect herbivores with piercing-sucking mouthparts, or stylets. Characterization of waveforms produced by insects during stylet probing is essential to the application of this ...

  20. A new optimization approach for source-encoding full-waveform inversion

    NARCIS (Netherlands)

    Moghaddam, P.P.; Keers, H.; Herrmann, F.J.; Mulder, W.A.

    2013-01-01

    Waveform inversion is the method of choice for determining a highly heterogeneous subsurface structure. However, conventional waveform inversion requires that the wavefield for each source is computed separately. This makes it very expensive for realistic 3D seismic surveys. Source-encoding waveform

  1. A new optimization approach for source-encoding full-waveform inversion

    NARCIS (Netherlands)

    Moghaddam, P.P.; Keers, H.; Herrmann, F.J.; Mulder, W.A.

    2013-01-01

    Waveform inversion is the method of choice for determining a highly heterogeneous subsurface structure. However, conventional waveform inversion requires that the wavefield for each source is computed separately. This makes it very expensive for realistic 3D seismic surveys. Source-encoding waveform

  2. Principles of Faithful Execution in the implementation of trusted objects.

    Energy Technology Data Exchange (ETDEWEB)

    Tarman, Thomas David; Campbell, Philip LaRoche; Pierson, Lyndon George

    2003-09-01

    We begin with the following definitions: Definition: A trusted volume is the computing machinery (including communication lines) within which data is assumed to be physically protected from an adversary. A trusted volume provides both integrity and privacy. Definition: Program integrity consists of the protection necessary to enable the detection of changes in the bits comprising a program as specified by the developer, for the entire time that the program is outside a trusted volume. For ease of discussion we consider program integrity to be the aggregation of two elements: instruction integrity (detection of changes in the bits within an instruction or block of instructions), and sequence integrity (detection of changes in the locations of instructions within a program). Definition: Faithful Execution (FE) is a type of software protection that begins when the software leaves the control of the developer and ends within the trusted volume of a target processor. That is, FE provides program integrity, even while the program is in execution. (As we will show below, FE schemes are a function of trusted volume size.) FE is a necessary quality for computing. Without it we cannot trust computations. In the early days of computing FE came for free since the software never left a trusted volume. At that time the execution environment was the same as the development environment. In some circles that environment was referred to as a ''closed shop:'' all of the software that was used there was developed there. When an organization bought a large computer from a vendor the organization would run its own operating system on that computer, use only its own editors, only its own compilers, only its own debuggers, and so on. However, with the continuing maturity of computing technology, FE becomes increasingly difficult to achieve

  3. Long-term funding and faithfulness to the original goal

    Energy Technology Data Exchange (ETDEWEB)

    Sjoegren, G

    1999-02-01

    The study describes long-term funding in terms of faithfulness to the original goals of the foundations. After having examined 20 different Swedish foundations three main categories of problems have appeared. The main threats to the original goals of the foundations are juridical problems, economic problems and a changing society. Fraud and embezzlement are covered by the Act (1994:1220) Concerning Foundations, but the law does not prevent unfaithfulness to the original goal of the foundation in terms of permutation. If the foundation is a private-established foundation the board has to apply for a change of the original goal to the Swedish Judicial Board for Public Lands and Funds. If the State, a municipality or a community establishes the foundation the Government can change the goal without permission of any other authority. Economic problems often strike smaller funds established by private persons, but State-established funds can also be hit by economical problems. The economic problems presented in the text are high tax levels, bad investments and problems getting donations. Both small private and large State-established foundations sometimes have to change their original goals as a result of a changing society. The goal of the foundation can be out-of-date, be against the ideology of the government party or the demography might have changed. Examples from each category are given in the text. The study is made to facilitate a description in general terms of the prospects for the Swedish nuclear funds if a final decision can not be made in the time span of 100 or 200 years. Looking back on the changes in the judicial, economical and political arenas during the last 200 years, one realizes the impossibility to foresee the changes that will occur within the next 200 years. The author`s conclusion, after examined 20 foundation, is that it is impossible to establish a perfect long-term fund as we can not foresee the long-term future

  4. The Modularized Software Package ASKI - Full Waveform Inversion Based on Waveform Sensitivity Kernels Utilizing External Seismic Wave Propagation Codes

    Science.gov (United States)

    Schumacher, F.; Friederich, W.

    2015-12-01

    We present the modularized software package ASKI which is a flexible and extendable toolbox for seismic full waveform inversion (FWI) as well as sensitivity or resolution analysis operating on the sensitivity matrix. It utilizes established wave propagation codes for solving the forward problem and offers an alternative to the monolithic, unflexible and hard-to-modify codes that have typically been written for solving inverse problems. It is available under the GPL at www.rub.de/aski. The Gauss-Newton FWI method for 3D-heterogeneous elastic earth models is based on waveform sensitivity kernels and can be applied to inverse problems at various spatial scales in both Cartesian and spherical geometries. The kernels are derived in the frequency domain from Born scattering theory as the Fréchet derivatives of linearized full waveform data functionals, quantifying the influence of elastic earth model parameters on the particular waveform data values. As an important innovation, we keep two independent spatial descriptions of the earth model - one for solving the forward problem and one representing the inverted model updates. Thereby we account for the independent needs of spatial model resolution of forward and inverse problem, respectively. Due to pre-integration of the kernels over the (in general much coarser) inversion grid, storage requirements for the sensitivity kernels are dramatically reduced.ASKI can be flexibly extended to other forward codes by providing it with specific interface routines that contain knowledge about forward code-specific file formats and auxiliary information provided by the new forward code. In order to sustain flexibility, the ASKI tools must communicate via file output/input, thus large storage capacities need to be accessible in a convenient way. Storing the complete sensitivity matrix to file, however, permits the scientist full manual control over each step in a customized procedure of sensitivity/resolution analysis and full

  5. Modelling Sensor and Target effects on LiDAR Waveforms

    Science.gov (United States)

    Rosette, J.; North, P. R.; Rubio, J.; Cook, B. D.; Suárez, J.

    2010-12-01

    The aim of this research is to explore the influence of sensor characteristics and interactions with vegetation and terrain properties on the estimation of vegetation parameters from LiDAR waveforms. This is carried out using waveform simulations produced by the FLIGHT radiative transfer model which is based on Monte Carlo simulation of photon transport (North, 1996; North et al., 2010). The opportunities for vegetation analysis that are offered by LiDAR modelling are also demonstrated by other authors e.g. Sun and Ranson, 2000; Ni-Meister et al., 2001. Simulations from the FLIGHT model were driven using reflectance and transmittance properties collected from the Howland Research Forest, Maine, USA in 2003 together with a tree list for a 200m x 150m area. This was generated using field measurements of location, species and diameter at breast height. Tree height and crown dimensions of individual trees were calculated using relationships established with a competition index determined for this site. Waveforms obtained by the Laser Vegetation Imaging Sensor (LVIS) were used as validation of simulations. This provided a base from which factors such as slope, laser incidence angle and pulse width could be varied. This has enabled the effect of instrument design and laser interactions with different surface characteristics to be tested. As such, waveform simulation is relevant for the development of future satellite LiDAR sensors, such as NASA’s forthcoming DESDynI mission (NASA, 2010), which aim to improve capabilities of vegetation parameter estimation. ACKNOWLEDGMENTS We would like to thank scientists at the Biospheric Sciences Branch of NASA Goddard Space Flight Center, in particular to Jon Ranson and Bryan Blair. This work forms part of research funded by the NASA DESDynI project and the UK Natural Environment Research Council (NE/F021437/1). REFERENCES NASA, 2010, DESDynI: Deformation, Ecosystem Structure and Dynamics of Ice. http

  6. The shaping of a national ignition campaign pulsed waveform

    Energy Technology Data Exchange (ETDEWEB)

    Brunton, Gordon, E-mail: brunton2@llnl.gov [Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States); Erbert, Gaylen; Browning, Don; Tse, Eddy [Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States)

    2012-12-15

    Highlights: Black-Right-Pointing-Pointer NIF pulse is generated using an electro-optic modulator to vary the intensity of light. Black-Right-Pointing-Pointer Electrical impulse generators, each with a 300 ps pulse Gaussian signal are utilized. Black-Right-Pointing-Pointer Adjusting the impulse amplitude for 140 impulses, produces a pulsed waveform. Black-Right-Pointing-Pointer System auto shapes 48 waveforms with to 275:1 contrast ratio with 3% absolute error. - Abstract: The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory is a stadium-sized facility containing a 192 beam, 1.8 MJ, 500 TW ultraviolet laser system used for inertial confinement fusion research. For each experimental shot, NIF must deliver a precise amount of laser power on the target for successful and efficient target ignition, and these characteristics vary depending on the physics of the particular campaign. The precise temporal shape, energy and timing characteristics of a pulsed waveform target interaction are key components in meeting the experimental goals. Each NIF pulse is generated in the Master Oscillator Room (MOR) using an electro-optic modulator to vary the intensity of light in response to an electrical input. The electrical drive signal to the modulator is produced using a unique, high-performance arbitrary waveform generator (AWG). This AWG sums the output of 140 electrical impulse generators, each producing a 300 ps pulse width Gaussian signal separated in time by 250 ps. By adjusting the amplitudes and summing the 140 impulses, a pulsed waveform can be sculpted from a seed 45 ns square pulse. Using software algorithms written for NIF's Integrated Computer Control System (ICCS), the system is capable of autonomously shaping 48 unique experimental pulsed waveforms for each shot that have demonstrated up to 275:1 contrast ratio with {+-}3% absolute error averaged over any 2 ns interval, meeting the stringent pulse requirements needed to achieve ignition

  7. Effects of output waveforms on penetration for Nd: YAG laser welding

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    By using a Nd: YAG laser welding system devised for transmitting continuous, rectangular and pulsed waveforms, comprehensive and deep investigation is focused on the effects of several parameters of rectangular waveform and pulsed output wave superimposed on a rectangular waveform on the penetration depth of weld. Research results indicate that the average power, duty cycle, frequency and peak power of rectangular wave affect the weld penetration depth to different extent. Results of experiments and analysis also indicate that the pulse delay time, pulse width and the power ratio of pulse to rectangular waveform seriously influence the penetration when the pulsed wave is superimposed on a rectangular waveform.

  8. Signal waveform detection with statistical automaton for internet and web service streaming.

    Science.gov (United States)

    Tseng, Kuo-Kun; Ji, Yuzhu; Liu, Yiming; Huang, Nai-Lun; Zeng, Fufu; Lin, Fang-Ying

    2014-01-01

    In recent years, many approaches have been suggested for Internet and web streaming detection. In this paper, we propose an approach to signal waveform detection for Internet and web streaming, with novel statistical automatons. The system records network connections over a period of time to form a signal waveform and compute suspicious characteristics of the waveform. Network streaming according to these selected waveform features by our newly designed Aho-Corasick (AC) automatons can be classified. We developed two versions, that is, basic AC and advanced AC-histogram waveform automata, and conducted comprehensive experimentation. The results confirm that our approach is feasible and suitable for deployment.

  9. Signal Waveform Detection with Statistical Automaton for Internet and Web Service Streaming

    Directory of Open Access Journals (Sweden)

    Kuo-Kun Tseng

    2014-01-01

    Full Text Available In recent years, many approaches have been suggested for Internet and web streaming detection. In this paper, we propose an approach to signal waveform detection for Internet and web streaming, with novel statistical automatons. The system records network connections over a period of time to form a signal waveform and compute suspicious characteristics of the waveform. Network streaming according to these selected waveform features by our newly designed Aho-Corasick (AC automatons can be classified. We developed two versions, that is, basic AC and advanced AC-histogram waveform automata, and conducted comprehensive experimentation. The results confirm that our approach is feasible and suitable for deployment.

  10. A method of waveform design based on mutual information

    Institute of Scientific and Technical Information of China (English)

    Bo JIU; Hongwei LIU; Liya LI; Shunjun WU

    2009-01-01

    A novel method called the general waterfilling, which is suitable when clutter is not negligible, is proposed to solve the waveform design problem of broadband radar for the recognition of multiple extended targets. The uncertainty of the target's radar signatures is decreased via maximizing the mutual information between a random extended target and the received signal. Then, the general water-filling method is employed to the waveform design problem for multiple extended targets identification to increase the separability of multiple targets. Experimental results evaluated the efficiency of the proposed method. Compared to chirp signal and water-filling signal,our method improves the classification rates and even performs better at low signal-to-interference-plus-noise ratio (SINR).

  11. An electro-optic waveform interconnect based on quantum interference

    CERN Document Server

    Qin, Li-Guo; Gong, Shang-Qing

    2016-01-01

    The ability to modulate an optical field via an electric field is regarded as a key function of electro-optic interconnects, which are used in optical communications and information processing systems. One of the main required devices for such interconnects is the electro-optic modulator (EOM). Current EOM based on the electro-optic effect and the electro-absorption effect often is bulky and power inefficient due to the weak electro-optic properties of its constituent materials. Here we propose a new mechanism to produce an arbitrary-waveform EOM based on the quantum interference, in which both the real and imaginary parts of the susceptibility are engineered coherently with the superhigh efficiency. Based on this EOM, a waveform interconnect from the voltage to the modulated optical absorption is realised. We expect that such a new type of electro-optic interconnect will have a broad range of applications including the optical communications and network.

  12. Software Communication Architecture Implementation and Its Waveform Application

    Institute of Scientific and Technical Information of China (English)

    SUN Pei-gang; ZHAO Hai; WANG Ting-chang; FAN Jian-hua

    2006-01-01

    This paper attempts to do a research on the development of software defined radio(SDR) based on software communication architecture(SCA). Firstly, SCA is studied and a whole reference model of SCA3.0 core framework (CF)is realized; Secondly, an application-specific FM3TR waveform is implemented on the platform of common software based on the reference model; Thirdly, from the point of view of real-time performance and software reuse, tests and validations are made on the above realized CF reference model and FM3TR waveform. As a result, the SCA-compliant SDR has favorable interoperability and software portability and can satisfy the real-time performance requirements which are not too rigorous.

  13. TOF Spectroscopy measurement with waveform Digitizer at TMSR Photoneutron Source

    CERN Document Server

    Liu, Longxiang; Ma, Yugang; Cao, Xiguang; Cai, Xiangzhou; Chen, Jingen; Zhang, Guilin; Han, Jianlong; Zhang, Guogiang; Hu, Jifeng; Wang, Xiaohe

    2015-01-01

    The Photo-Neutron Source(PNS,phase 1), is an electron linear accelerator (linac) based pulsed neutron facility, combined with TOF technique, was constructed for nuclear data measurement of Thorium Molten Salt Reactor(TMSR) in Shanghai Institute of Applied Physics(SINAP) at JiaDing campus. The TOF detector signal, with the arrive time, pulse shape and pulse hight information, was recorded by a waveform digitizer. Through the pulse-shape discrimination(PSD) between neutrons and gamma-rays and time of Gamma Flash and Neutron signal analyse, the neutron TOF spectrum was deduced with this simple electronics design, and a new DAQ system based on waveform digitizer was used in this test experiment.

  14. Image-domain full waveform inversion: Field data example

    KAUST Repository

    Zhang, Sanzong

    2014-08-05

    The main difficulty with the data-domain full waveform inversion (FWI) is that it tends to get stuck in the local minima associated with the waveform misfit function. This is the result of cycle skipping which degrades the low-wavenumber update in the absence of low-frequencies and long-offset data. An image-domain objective function is defined as the normed difference between the predicted and observed common image gathers (CIGs) in the subsurface offset domain. This new objective function is not constrained by cycle skipping at the far subsurface offsets. To test the effectiveness of this method, we apply it to marine data recorded in the Gulf of Mexico. Results show that image-domain FWI is less sensitive to the initial model and the absence of low-frequency data compared with conventional FWI. The liability, however, is that it is almost an order of magnitude more expensive than standard FWI.

  15. Transient sodium current at subthreshold voltages: activation by EPSP waveforms.

    Science.gov (United States)

    Carter, Brett C; Giessel, Andrew J; Sabatini, Bernardo L; Bean, Bruce P

    2012-09-20

    Tetrodotoxin (TTX)-sensitive sodium channels carry large transient currents during action potentials and also "persistent" sodium current, a noninactivating TTX-sensitive current present at subthreshold voltages. We examined gating of subthreshold sodium current in dissociated cerebellar Purkinje neurons and hippocampal CA1 neurons, studied at 37°C with near-physiological ionic conditions. Unexpectedly, in both cell types small voltage steps at subthreshold voltages activated a substantial component of transient sodium current as well as persistent current. Subthreshold EPSP-like waveforms also activated a large component of transient sodium current, but IPSP-like waveforms engaged primarily persistent sodium current with only a small additional transient component. Activation of transient as well as persistent sodium current at subthreshold voltages produces amplification of EPSPs that is sensitive to the rate of depolarization and can help account for the dependence of spike threshold on depolarization rate, as previously observed in vivo.

  16. A versatile waveform generator for testing neuroelectric signal processors.

    Science.gov (United States)

    Kohn, A F

    1989-08-01

    A multi-channel waveform generator was designed for testing neuroelectric signal processors. Smooth transient signals that resemble action potentials or evoked potentials are generated by a second order switched capacitor filter excited by brief rectangular pulses. The choice of an integrated circuit switched capacitor filter simplified the design by circumventing some of the disadvantages of conventional active filters. The waveform generator is versatile, with several signal parameters being independently adjustable from front panel controls: duration, waveshape, latency, amplitude and signal-to-noise ratio. The generator has been used for testing evoked potential acquisition and processing systems, for evaluating the effects of analog filters on evoked potentials and for testing systems designed to detect and classify trains of multi-unit action potentials.

  17. Leveraging waveform complexity for confident detection of gravitational waves

    CERN Document Server

    Kanner, Jonah B; Cornish, Neil; Millhouse, Meg; Xhakaj, Enia; Salemi, Francesco; Drago, Marco; Vedovato, Gabriele; Klimenko, Sergey

    2016-01-01

    The recent completion of Advanced LIGO suggests that gravitational waves (GWs) may soon be directly observed. Past searches for gravitational-wave transients have been impacted by transient noise artifacts, known as glitches, introduced into LIGO data due to instrumental and environmental effects. In this work, we explore how waveform complexity, instead of signal-to-noise ratio, can be used to rank event candidates and distinguish short duration astrophysical signals from glitches. We test this framework using a new hierarchical pipeline that directly compares the Bayesian evidence of explicit signal and glitch models. The hierarchical pipeline is shown to have strong performance, and in particular, allows high-confidence detections of a range of waveforms at realistic signal-to-noise ratio with a two detector network.

  18. Waveform effects of a metastable olivine tongue in subducting slabs

    Science.gov (United States)

    Vidale, John E.; Williams, Quentin; Houston, Heidi

    1991-01-01

    Velocity models of subducting slabs with a kinetically-depressed olivine to beta- and gamma-spinel transition are constructed, and the effect that such structures would have on teleseismic P waveforms are examined using a full-wave finite-difference method. These 2D calculations yielded waveforms at a range of distances in the downdip direction. The slab models included a wedge-shaped, low-velocity metastable olivine tongue (MOTO) to a depth of 670 km, as well as a plausible thermal anomaly; one model further included a 10-km-thick fast layer on the surface of the slab. The principal effect of MOTO is to produce grazing reflections at wide angles off the phase boundary, generating a secondary arrival 0 to 4 seconds after the initial arrival depending on the take-off angle. The amplitude and timing of this feature vary with the lateral location of the seismic source within the slab cross-section.

  19. Metering error quantification under voltage and current waveform distortion

    Science.gov (United States)

    Wang, Tao; Wang, Jia; Xie, Zhi; Zhang, Ran

    2017-09-01

    With integration of more and more renewable energies and distortion loads into power grid, the voltage and current waveform distortion results in metering error in the smart meters. Because of the negative effects on the metering accuracy and fairness, it is an important subject to study energy metering combined error. In this paper, after the comparing between metering theoretical value and real recorded value under different meter modes for linear and nonlinear loads, a quantification method of metering mode error is proposed under waveform distortion. Based on the metering and time-division multiplier principles, a quantification method of metering accuracy error is proposed also. Analyzing the mode error and accuracy error, a comprehensive error analysis method is presented which is suitable for new energy and nonlinear loads. The proposed method has been proved by simulation.

  20. Waveform relaxation for the computational homogenization of multiscale magnetoquasistatic problems

    Science.gov (United States)

    Niyonzima, I.; Geuzaine, C.; Schöps, S.

    2016-12-01

    This paper proposes the application of the waveform relaxation method to the homogenization of multiscale magnetoquasistatic problems. In the monolithic heterogeneous multiscale method, the nonlinear macroscale problem is solved using the Newton-Raphson scheme. The resolution of many mesoscale problems per Gauß point allows to compute the homogenized constitutive law and its derivative by finite differences. In the proposed approach, the macroscale problem and the mesoscale problems are weakly coupled and solved separately using the finite element method on time intervals for several waveform relaxation iterations. The exchange of information between both problems is still carried out using the heterogeneous multiscale method. However, the partial derivatives can now be evaluated exactly by solving only one mesoscale problem per Gauß point.

  1. Analytic gravitational waveforms for generic precessing compact binaries

    CERN Document Server

    Chatziioannou, Katerina; Cornish, Neil; Yunes, Nicolas

    2016-01-01

    Binary systems of two compact objects circularize and spiral toward each other via the emission of gravitational waves. The coupling of the spins of each object with the orbital angular momentum causes the orbital plane to precess, which leads to modulation of the gravitational wave signal. Until now, generating frequency-domain waveforms for fully precessing systems for use in gravitational wave data analysis meant numerically integrating the equations of motion, then Fourier transforming the result, which is very computationally intensive for systems that complete hundreds or thousands of cycles in the sensitive band of a detector. Previously, analytic solutions were only available for certain special cases or for simplified models. Here we describe the construction of closed-form, frequency-domain waveforms for fully-precessing, quasi-circular binary inspirals.

  2. Optimal control of photoelectron emission by realistic waveforms

    CERN Document Server

    Solanpää, Janne; Räsänen, Esa

    2016-01-01

    Recent experimental techniques in multicolor waveform synthesis allow the temporal shaping of strong femtosecond laser pulses with applications in the control of quantum mechanical processes in atoms, molecules, and nanostructures. Prediction of the shapes of the optimal waveforms can be done computationally using quantum optimal control theory (QOCT). In this work we bring QOCT to experimental feasibility by providing an optimal control scheme with realistic pulse representation. We apply the technique to optimal control of above-threshold photoelectron emission from a one-dimensional hydrogen atom. By mixing different spectral channels and thus lowering the intensity requirements for individual channels, the resulting optimal pulses can extend the cutoff energies by at least up to 50% and bring up the electron yield by several orders of magnitude. Insights into the electron dynamics for optimized photoelectron emission are obtained with a semiclassical two-step model.

  3. Leveraging waveform complexity for confident detection of gravitational waves

    Science.gov (United States)

    Kanner, Jonah B.; Littenberg, Tyson B.; Cornish, Neil; Millhouse, Meg; Xhakaj, Enia; Salemi, Francesco; Drago, Marco; Vedovato, Gabriele; Klimenko, Sergey

    2016-01-01

    The recent completion of Advanced LIGO suggests that gravitational waves may soon be directly observed. Past searches for gravitational-wave transients have been impacted by transient noise artifacts, known as glitches, introduced into LIGO data due to instrumental and environmental effects. In this work, we explore how waveform complexity, instead of signal-to-noise ratio, can be used to rank event candidates and distinguish short duration astrophysical signals from glitches. We test this framework using a new hierarchical pipeline that directly compares the Bayesian evidence of explicit signal and glitch models. The hierarchical pipeline is shown to perform well and, in particular, to allow high-confidence detections of a range of waveforms at a realistic signal-to-noise ratio with a two-detector network.

  4. Waveform effects of a metastable olivine tongue in subducting slabs

    Science.gov (United States)

    Vidale, John E.; Williams, Quentin; Houston, Heidi

    1991-01-01

    Velocity models of subducting slabs with a kinetically-depressed olivine to beta- and gamma-spinel transition are constructed, and the effect that such structures would have on teleseismic P waveforms are examined using a full-wave finite-difference method. These 2D calculations yielded waveforms at a range of distances in the downdip direction. The slab models included a wedge-shaped, low-velocity metastable olivine tongue (MOTO) to a depth of 670 km, as well as a plausible thermal anomaly; one model further included a 10-km-thick fast layer on the surface of the slab. The principal effect of MOTO is to produce grazing reflections at wide angles off the phase boundary, generating a secondary arrival 0 to 4 seconds after the initial arrival depending on the take-off angle. The amplitude and timing of this feature vary with the lateral location of the seismic source within the slab cross-section.

  5. Analysis of Chaotic Waveforms for Application to Active Sonar Systems

    Science.gov (United States)

    1993-06-01

    Noise-Reduced Signal. Figure 4-2. Noise Reduction Power Spectra : (a) Power Spectrum of Lorenz Waveform; (b) Gaussian Noise; (c) Signal Plus Noise; and (d...dimension, theoretic entropy and Lyapunov exponent, are also described for completeness even though they are not used in this study. 2.5.1 Correlation...For each lical center, a data covariance matrix is formed using the nearest neighbors. Singular value decomposition ( SVD ) is then applied to the matrix

  6. MURI: Adaptive Waveform Design for Full Spectral Dominance

    Science.gov (United States)

    2011-03-11

    response of a uniform linear array 3 ( ULA ) with BIC. We derived the maximum likelihood estimates (MLEs) of the DOAs and computed the Cramér-Rao bound (CRB...Elnour, 2006-2007 IEEE Antennas and Propagation Society Graduate Fellowship award. (Advisor: Danilo Erricolo) • Murat Akcakaya, Best Student Paper...Award (first place) at the 2010 Waveform Diversity & Design Conference. (Co-author: Arye Nehorai) • Murat Akcakaya, co-author, Best Student Paper

  7. Optimal storage and retrieval of single-photon waveforms.

    Science.gov (United States)

    Zhou, Shuyu; Zhang, Shanchao; Liu, Chang; Chen, J F; Wen, Jianming; Loy, M M T; Wong, G K L; Du, Shengwang

    2012-10-22

    We report an experimental demonstration of optimal storage and retrieval of heralded single-photon wave packets using electromagnetically induced transparency (EIT) in cold atoms at a high optical depth. We obtain an optimal storage efficiency of (49 ± 3)% for single-photon waveforms with a temporal likeness of 96%. Our result brings the EIT quantum light-matter interface closer to practical quantum information applications.

  8. PMT waveform modeling at the Daya Bay experiment

    Institute of Scientific and Technical Information of China (English)

    S(o)ren JETTER; Dan DWYER; JIANG Wen-Qi; LIU Da-Wei; WANG Yi-Fang; WANG Zhi-Min; WEN Liang-Jian

    2012-01-01

    Detailed measurements of Hamamatsu R5912 photomultiplier signals are presented,including the single photoelectron charge response,waveform shape,nonlinearity,saturation,overshoot,oscillation,prepulsing,and afterpulsing.The results were used to build a detailed model of the PMT signal characteristics over a wide range of light intensities.Including the PMT model in simulated Daya Bay particle interactions shows no significant systematic effects that are detrimental to the experimental sensitivity.

  9. Comparison of three arterial pulse waveform classification techniques.

    Science.gov (United States)

    Allen, J; Murray, A

    1996-01-01

    Peripheral pulse waveforms can become stretched and damped with increasing severity of peripheral vascular disease (PVD) and hence could provide valuable diagnostic information. This study compares the diagnostic performance of 3 established classification techniques (a linear discriminant classifier, a k-nearest neighbour classifier, and an artificial neural network) for the detection of lower limb arterial disease from pulse waveforms obtained using photoelectric plethysmography (PPG). Pulse waveforms and pre- and post-exercise Doppler ultrasound ankle to brachial pressure indices (ABPI) were obtained from patients attending a vascular measurement laboratory. A single PPG pulse from each big toe was recorded direct to computer, pre-processed, and then used as classifier input data. The correct classifier outputs were the corresponding ABPI diagnostic classification. Pulse and ABPI measurements from 100 legs were used as training data for each classifier, and the computed classifications for pulses from a further 266 legs were then compared with their ABPI diagnoses. The diagnostic accuracy of the artificial neural network (80%; was higher than for the optimized k-nearest neighbour classifier (k = 27, accuracy 76% and the linear discriminant classifier (71%). The Kappa measure of agreement which excludes chance was highest for the artificial neural network (57%) and significantly higher than that of the linear discriminant classifier (Kappa 40%, p < 0.05). The value of Kappa for the optimized k-nearest neighbour classifier (k = 27) was intermediate at 47%. This study has shown that classifiers can be taught to discriminate between small, and perhaps subtle, differences in features. We have demonstrated that artificial neural networks can be used to classify arterial pulse waveforms, and can perform better overall than k-nearest neighbour or linear discriminant classifiers for this application.

  10. Arbitrary waveform generator to improve laser diode driver performance

    Science.gov (United States)

    Fulkerson, Jr, Edward Steven

    2015-11-03

    An arbitrary waveform generator modifies the input signal to a laser diode driver circuit in order to reduce the overshoot/undershoot and provide a "flat-top" signal to the laser diode driver circuit. The input signal is modified based on the original received signal and the feedback from the laser diode by measuring the actual current flowing in the laser diode after the original signal is applied to the laser diode.

  11. Individual Flagellar Waveform Affects Collective Behavior of Chlamydomonas reinhardtii.

    Science.gov (United States)

    Kage, Azusa; Mogami, Yoshihiro

    2015-08-01

    Bioconvection is a form of collective motion that occurs spontaneously in the suspension of swimming microorganisms. In a previous study, we quantitatively described the "pattern transition," a phase transition phenomenon that so far has exclusively been observed in bioconvection of the unicellular green alga Chlamydomonas. We suggested that the transition could be induced by changes in the balance between the gravitational and shear-induced torques, both of which act to determine the orientation of the organism in the shear flow. As both of the torques should be affected by the geometry of the Chlamydomonas cell, alteration in the flagellar waveform might change the extent of torque generation by altering overall geometry of the cell. Based on this working hypothesis, we examined bioconvection behavior of two flagellar mutants of Chlamydomonas reinhardtii, ida1 and oda2, making reference to the wild type. Flagella of ida1 beat with an abnormal waveform, while flagella of oda2 show a normal waveform but lower beat frequency. As a result, both mutants had swimming speed of less than 50% of the wild type. ida1 formed bioconvection patterns with smaller spacing than those of wild type and oda2. Two-axis view revealed the periodic movement of the settling blobs of ida1, while oda2 showed qualitatively similar behavior to that of wild type. Unexpectedly, ida1 showed stronger negative gravitaxis than did wild type, while oda2 showed relatively weak gravitaxis. These findings suggest that flagellar waveform, not swimming speed or beat frequency, strongly affect bioconvection behavior in C. reinhardtii.

  12. Acquisition of L2 Japanese Geminates: Training with Waveform Displays

    Science.gov (United States)

    Motohashi-Saigo, Miki; Hardison, Debra M.

    2009-01-01

    The value of waveform displays as visual feedback was explored in a training study involving perception and production of L2 Japanese by beginning-level L1 English learners. A pretest-posttest design compared auditory-visual (AV) and auditory-only (A-only) Web-based training. Stimuli were singleton and geminate /t,k,s/ followed by /a,u/ in two…

  13. Waveform design and diversity for advanced radar systems

    CERN Document Server

    Gini, Fulvio

    2012-01-01

    In recent years, various algorithms for radar signal design, that rely heavily upon complicated processing and/or antenna architectures, have been suggested. These techniques owe their genesis to several factors, including revolutionary technological advances (new flexible waveform generators, high speed signal processing hardware, digital array radar technology, etc.) and the stressing performance requirements, often imposed by defence applications in areas such as airborne early warning and homeland security.Increasingly complex operating scenarios calls for sophisticated algorithms with the

  14. Photonic Synthesis and Processing of Ultrabroadband Radio-Frequency Waveforms

    Science.gov (United States)

    2009-11-17

    Filed in Foreign Countries? (5d-2) Was the assignment forwarded to the contracting officer? (5e) N Foreign Countries of application ( 5g -2): 5 Jason D...techniques given the fixed electronic pulse shaping networks used to generated monocycle waveforms. Finally, the delay between adjacent monocycles is tunable...Dispersion Compensation In moving our RF-AWG technique and apparatus towards applications in wireless RF systems, we have begun to investigate

  15. Advanced waveform decomposition for high-speed videoendoscopy analysis.

    Science.gov (United States)

    Ikuma, Takeshi; Kunduk, Melda; McWhorter, Andrew J

    2013-05-01

    This article presents a novel approach to analyze nonperiodic vocal fold behavior of high-speed videoendoscopy (HSV) data. Although HSV can capture true vibrational motions of the vocal folds, its clinical advantage over the videostroboscopy has not widely been accepted. One of the key advantages of the HSV over the videostroboscopy is its ability to capture vocal folds' nonperiodic behavior, which is more prominent in pathological vocal folds. However, such nonperiodicity in the HSV data has not been fully explored quantitatively beyond simple perturbation analysis. This article presents an advanced waveform modeling and decomposition technique for HSV-based waveforms. Waveforms are modeled to have three components: harmonic signal, deterministic nonharmonic signal, and random nonharmonic signal. This decomposition is motivated by the fact that voice disorders introduce signal content that is nonharmonic but carries deterministic quality such as subharmonic or modulating content. The proposed model is aimed to isolate such disordered behaviors as deterministic nonharmonic signal and quantify them. In addition to the model, the article outlines model parameter estimation procedures and a family of harmonics-to-noise ratio (HNR) parameters. The proposed HNR parameters include harmonics-to-deterministic-noise ratio (HDNR) and harmonics-to-random-noise ratio. A preliminary study demonstrates the effectiveness of the extended model and its HNR parameters. Vocal folds with and without benign lesions (Nwith = 13; Nwithout = 20) were studied with HSV glottal area waveforms. All three HNR parameters significantly distinguished the disordered condition, and the HDNR reported the largest effect size (Cohen's d = 2.04).

  16. A Convergent Iterative Algorithm for Solving Elastic Waveform Inversion

    Institute of Scientific and Technical Information of China (English)

    张剑锋

    1994-01-01

    The numerical method for elastic waveform inversion is studied and a convergent iterative algorithm is achieved by designing vinual source and altering objective function of the optimization solution in the computational process, which enables the solutions to converge to the real values and improves the convergence rate by changing the property of curved surface of the objective function, thus opening a new way for further developing the optimization solution of inverse problems.

  17. Strategies for efficient resolution analysis in full-waveform inversion

    Science.gov (United States)

    Fichtner, A.; van Leeuwen, T.; Trampert, J.

    2016-12-01

    Full-waveform inversion is developing into a standard method in the seismological toolbox. It combines numerical wave propagation for heterogeneous media with adjoint techniques in order to improve tomographic resolution. However, resolution becomes increasingly difficult to quantify because of the enormous computational requirements. Here we present two families of methods that can be used for efficient resolution analysis in full-waveform inversion. They are based on the targeted extraction of resolution proxies from the Hessian matrix, which is too large to store and to compute explicitly. Fourier methods rest on the application of the Hessian to Earth models with harmonic oscillations. This yields the Fourier spectrum of the Hessian for few selected wave numbers, from which we can extract properties of the tomographic point-spread function for any point in space. Random probing methods use uncorrelated, random test models instead of harmonic oscillations. Auto-correlating the Hessian-model applications for sufficiently many test models also characterises the point-spread function. Both Fourier and random probing methods provide a rich collection of resolution proxies. These include position- and direction-dependent resolution lengths, and the volume of point-spread functions as indicator of amplitude recovery and inter-parameter trade-offs. The computational requirements of these methods are equivalent to approximately 7 conjugate-gradient iterations in full-waveform inversion. This is significantly less than the optimisation itself, which may require tens to hundreds of iterations to reach convergence. In addition to the theoretical foundations of the Fourier and random probing methods, we show various illustrative examples from real-data full-waveform inversion for crustal and mantle structure.

  18. Frequency-Dependent Blanking with Digital Linear Chirp Waveform Synthesis

    Energy Technology Data Exchange (ETDEWEB)

    Doerry, Armin Walter [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Andrews, John M. [General Atomics Aeronautical Systems, Inc., San Diego, CA (United States)

    2014-07-01

    Wideband radar systems, especially those that operate at lower frequencies such as VHF and UHF, are often restricted from transmitting within or across specific frequency bands in order to prevent interference to other spectrum users. Herein we describe techniques for notching the transmitted spectrum of a generated and transmitted radar waveform. The notches are fully programmable as to their location, and techniques are given that control the characteristics of the notches.

  19. "Kludge" gravitational waveforms for a test-body orbiting a Kerr black hole

    CERN Document Server

    Babak, S; Gair, J R; Glampedakis, K; Hughes, S A; Babak, Stanislav; Fang, Hua; Gair, Jonathan R.; Glampedakis, Kostas; Hughes, Scott A.

    2006-01-01

    One of the most exciting potential sources of gravitational waves for low-frequency, space-based gravitational wave (GW) detectors such as the proposed Laser Interferometer Space Antenna (LISA) is the inspiral of compact objects into massive black holes in the centers of galaxies. The detection of waves from such "extreme mass ratio inspiral" systems (EMRIs) and extraction of information from those waves require template waveforms. The systems' extreme mass ratio means that their waveforms can be determined accurately using black hole perturbation theory. Such calculations are computationally very expensive. There is a pressing need for families of approximate waveforms that may be generated cheaply and quickly but which still capture the main features of true waveforms. In this paper, we introduce a family of such "kludge" waveforms and describe ways to generate them. We assess performance of the introduced approximations by comparing "kludge" waveforms to accurate waveforms obtained by solving the Teukolsky...

  20. The birds, the bees, and the Bible: single African American mothers' perceptions of a faith-based sexuality educaton program.

    Science.gov (United States)

    Cornelius, Judith Bacchus

    2009-01-01

    This exploratory study examined single mothers' ideas on the development of a faith-based sexuality program. Twenty African American single mothers with adolescent children (11 to 13 years of age) who were of the same faith and members of one church, participated in two focus groups about how a faith-based sexuality program could be designed and implemented. The findings call attention to the need for research on the design of faith-based sexuality education programs for ethnic minority families headed by single mothers.

  1. Reconstructing core-collapse supernovae waveforms with advanced era interferometers

    Science.gov (United States)

    McIver, Jessica; LIGO Scientific Collaboration

    2015-04-01

    Among of the wide range of potentially interesting astrophysical sources for Advanced LIGO and Advanced Virgo are galactic core-collapse supernovae. Although detectable core-collapse supernovae have a low expected rate (a few per century, or less) these signals would yield a wealth of new physics in the form of many messengers. Of particular interest is the insight into the explosion mechanism driving core-collapse supernovae that can be gleaned from the reconstructed gravitational wave signal. A well-reconstructed waveform will allow us to assess the likelihood of different explosion models, perform model selection, and potentially map unexpected features to new physics. This talk will present a study evaluating the current performance of the reconstruction of core-collapse supernovae gravitational wave signals. We used simulated waveforms modeled after different explosion mechanisms that we first injected into fake strain data re-colored to the expected Advanced LIGO/Virgo noise curves and then reconstructed using the pipelines Coherent Waveburst 2G and BayesWave. We will discuss the impact of these results on our ability to accurately reconstruct core-collapse supernovae signals, and by extension, other potential astrophysical generators of rich, complex waveforms.

  2. Frequency-domain waveform inversion using the phase derivative

    KAUST Repository

    Choi, Yun Seok

    2013-09-26

    Phase wrapping in the frequency domain or cycle skipping in the time domain is the major cause of the local minima problem in the waveform inversion when the starting model is far from the true model. Since the phase derivative does not suffer from the wrapping effect, its inversion has the potential of providing a robust and reliable inversion result. We propose a new waveform inversion algorithm using the phase derivative in the frequency domain along with the exponential damping term to attenuate reflections. We estimate the phase derivative, or what we refer to as the instantaneous traveltime, by taking the derivative of the Fourier-transformed wavefield with respect to the angular frequency, dividing it by the wavefield itself and taking the imaginary part. The objective function is constructed using the phase derivative and the gradient of the objective function is computed using the back-propagation algorithm. Numerical examples show that our inversion algorithm with a strong damping generates a tomographic result even for a high ‘single’ frequency, which can be a good initial model for full waveform inversion and migration.

  3. Waveform simulation of predominant periods in Osaka basin

    Science.gov (United States)

    Petukhin, A.; Tsurugi, M.

    2016-12-01

    Predominant period of strong ground motions is an important parameter in earthquake engineering practice. Resonance at predominant period may result in collapse of building. Usually, predominant periods are associated with the soil resonances. However, considering that strong ground motions are composed from source, path and site effects, predominant periods are affected by source and propagation path too. From another side, 3D basin interferences may amplify quite different periods, depending on site location relatively to the basin edges and independently on the soil depth. Moreover, constructive or destructive interference of waves from different asperities of a large source may enhance or diminish amplitudes at a particular predominant period respectively. In this study, to demonstrate variations of predominant periods due to complicated effects above, we simulated wavefield snapshots and waveforms at a few representative sites of Osaka basin, Japan. Seismic source is located in Nankai trough, hosting anticipated M9 earthquake. 3D velocity structure is combined from JIVSM velocity structure (Koketsu et al., 2012) and Osaka basin structure of Iwaki and Iwata, 2011. 3D-FDM method is used to simulate waveforms. Simulation results confirm some previous results that due to elongated elliptical shape of Osaka basin, interference effects are strong and peak amplitudes has characteristic stripped pattern elongated in parallel to the long axis of basin. We demonstrate that predominant periods have similar pattern and value of predominant period may strongly depend on the location of site and azimuthal orientation of waveform component.

  4. Characterizing Canopy Structure Using Waveform LiDAR

    Science.gov (United States)

    Wang, K.; Kumar, P.

    2016-12-01

    The structure of light penetration through the canopy plays an important role in water, carbon, and energy fluxes between the biosphere and the atmosphere. Canopy clumping, a description of foliage distribution, is one of the major aspects of canopy structure that significantly influence light and vegetation interaction. Airborne full-waveform LiDAR data contains large amounts of vegetation structural information, and is a powerful tool for providing detailed foliage distribution information for large areas of vegetation. In this study, we present a method for describing physical canopy clumping structure for individual trees that can resolve fine scale variations in foliage distribution. We first utilize the K-means clustering algorithm to extract structure from the large amounts of vegetation data provided by full-waveform LiDAR. Then we find representative traits for data clusters and use them to classify the clusters into three groups. Based on these traits, we draw conclusions about physical representations of each group, and identify two groups to contain structurally significant clusters. This study demonstrates that large amounts of canopy structural information can be extracted from waveform LiDAR data. The fine resolution canopy clumping structure found by the method described in this work can be used as valuable input for ecological models.

  5. Excitation Waveform Design for Lamb Wave Pulse Compression.

    Science.gov (United States)

    Lin, Jing; Hua, Jiadong; Zeng, Liang; Luo, Zhi

    2016-01-01

    Most ultrasonic guided wave methods focus on tone burst excitation to reduce the effect of dispersion so as to facilitate signal interpretation. However, the resolution of the output cannot attain a very high value because time duration of the excitation waveform cannot be very small. To overcome this limitation, a pulse compression technique is introduced to Lamb wave propagation to achieve a δ-like correlation so as to obtain a high resolution for inspection. Ideal δ-like correlation is impossible as only a finite frequency bandwidth can propagate. The primary purpose of this paper is to design a proper excitation waveform for Lamb wave pulse compression, which shortens the correlation as close as possible to a δ function. To achieve this purpose, the performance of some typical signals is discussed in pulse compression, which include linear chirp (L-Chirp) signal, nonlinear chirp (NL-Chirp) signal, Barker code (BC), and Golay complementary code (GCC). In addition, how the excitation frequency range influences inspection resolution is investigated. A strategy for the frequency range determination is established subsequently. Finally, an experiment is carried out on an aluminum plate where these typical signals are used as excitations at different frequency ranges. The quantitative comparisons of the pulse compression responses validate the theoretical findings. By utilizing the experimental data, the improvement of pulse compression in resolution compared with tone burst excitation is also validated, and the robustness of the waveform design method to inaccuracies in the dispersion compensation is discussed as well.

  6. The 1930 Irpinia earthquake: collection and analysis of historical waveforms

    Science.gov (United States)

    Ferrari, G.; Megna, A.; Nardi, A.; Palombo, B.; Perniola, B.; Pino, N.

    2002-12-01

    The 1930 Irpinia earthquake is one of the most destructive events recorded by instruments in Italy. Several large events occurred in the same area before (1456, 1694, 1702, 1732, 1910) and after (1962, 1980, 1983) 1930. It has been hypothesized that significant differences characterized the source geometry. Early work carried out by several authors on macroseismic studies and a single-station waveform analysis, suggests a quasi-strike slip mechanism on an approximately EW-oriented fault plain. Conversely, all the major events in the area display normal fault mechanisms on Apennine-oriented (NW-SE) fault planes. In the present work we have collected about 45 waveforms for the 1930 earthquake, recorded in various European observatories, aiming to find precious hints on source geometry and kinematics. The seismograms have been rasterized, digitized and processed within the framework of the SISMOS project. The study of this earthquake is part of a wider ongoing research program on the 20th century Irpinia earthquakes (1910, 1030, 1962 and 1980) within the collaboration between the TROMOS and SISMOS projects of the National Institute of Geophysics and Volcanology. The search and recovery of the historical recordings is a unique opportunity to shed light upon scientific aspects related to this kind of investigation. Preliminary results about the 1930 earthquake waveform analysis are presented here.

  7. EPOS-S: Integrated access to seismological waveforms

    Science.gov (United States)

    Sleeman, Reinoud; Strollo, Angelo; Michelini, Alberto; Clinton, John; Gueguen, Philippe; Luzi, Lucia; Pinar, Ali; Diaz, Jordi; Ceken, Ulubey; Evangelidis, Christos; Haslinger, Florian

    2016-04-01

    The main challenges of the EPOS TCS Seismology are to improve and to extend existing services to access earthquake waveforms (ORFEUS), parameters (EMSC) and hazard data and products (EFEHR), and producing a single framework that is technically integrated within the EPOS architecture. Technical developments in the services for seismological waveforms and associated data, including the compilation of station metadata and installing common data archival and sharing policies are within ORFEUS and its Working Groups. The focus is on 1) the development of the next generation software architecture for the European Integrated (seismological) Data Archive EIDA based on standardized webservices, the implementation of a data quality service and the realisation of a mediator service; 2) the development of EIDA-compliant services for strong motion data and acceleration data and the extension of the station metadata model; 3) the integration of data from mobile networks and OBS waveforms into EIDA by implementing mechanisms for coordination of transnational access and multinational experiments at available pools of OBS and mobile seismic stations; 4) achieve close integration with other EPOS TCS and the ICS with regard to interoperability and common use of tools & services, common and coordinated data models and metadata formats, and common computational platforms and IT solution implementations. This presentation will present the status of and current developments towards the above objectives.

  8. Arbitrary waveform modulated pulse EPR at 200 GHz

    Science.gov (United States)

    Kaminker, Ilia; Barnes, Ryan; Han, Songi

    2017-06-01

    We report here on the implementation of arbitrary waveform generation (AWG) capabilities at ∼200 GHz into an Electron Paramagnetic Resonance (EPR) and Dynamic Nuclear Polarization (DNP) instrument platform operating at 7 T. This is achieved with the integration of a 1 GHz, 2 channel, digital to analog converter (DAC) board that enables the generation of coherent arbitrary waveforms at Ku-band frequencies with 1 ns resolution into an existing architecture of a solid state amplifier multiplier chain (AMC). This allows for the generation of arbitrary phase- and amplitude-modulated waveforms at 200 GHz with >150 mW power. We find that the non-linearity of the AMC poses significant difficulties in generating amplitude-modulated pulses at 200 GHz. We demonstrate that in the power-limited regime of ω1 10 MHz) spin manipulation in incoherent (inversion), as well as coherent (echo formation) experiments. Highlights include the improvement by one order of magnitude in inversion bandwidth compared to that of conventional rectangular pulses, as well as a factor of two in improvement in the refocused echo intensity at 200 GHz.

  9. Waveform inversion for acoustic VTI media in frequency domain

    KAUST Repository

    Wu, Zedong

    2016-09-06

    Reflected waveform inversion (RWI) provides a method to reduce the nonlinearity of the standard full waveform inversion (FWI) by inverting for the background model using a single scattered wavefield from an inverted perturbation. However, current RWI methods are mostly based on isotropic media assumption. We extend the idea of the combining inversion for the background model and perturbations to address transversely isotropic with a vertical axis of symmetry (VTI) media taking into consideration of the optimal parameter sensitivity information. As a result, we apply Born modeling corresponding to perturbations in only for the variable e to derive the relative reflected waveform inversion formulation. To reduce the number of parameters, we assume the background part of η = ε and work with a single variable to describe the anisotropic part of the wave propagation. Thus, the optimization variables are the horizontal velocity v, η = ε and the e perturbation. Application to the anisotropic version of Marmousi model with a single frequency of 2.5 Hz shows that this method can converge to the accurate result starting from a linearly increasing isotropic initial velocity. Application to a real dataset demonstrates the versatility of the approach.

  10. Concepts and treatment for diabetes among traditional and faith healers in the Northern Province, South Africa

    Directory of Open Access Journals (Sweden)

    K Peltzer

    2001-09-01

    Full Text Available The purpose of the study was to assess the concepts and treatment modalities for diabetes among traditional and faith healers in the Northern Province in South Africa. The sample consisted of 50 traditional healers (13 females and 37 males and 50 faith healers (12 females and 38 males. They were interviewed on local terminology, clinical manifestations, causes, curability, and treatment for diabetes, help-seeking behaviour of diabetes patients, and the healers’ sources of information about diabetes. Results indicate that all healers were familiar with “diabetes”, however, not all of them had seen patients suffering from diabetes. The perceived causes of diabetes by both traditional and faith healers could be divided into (1 diet (especially too much of sugar, (2 heredity, (3 supernatural, and (4 psychological causes. Most traditional healers (92% and faith healers (90% indicated that diabetes is curable. Treatments used by the healers in this study included the use of prayer, diet, and herbs. The authors conclude that the concepts and treatment modalities for diabetes among traditional and faith healers should be taken note of by health workers while developing health education programmes in the Province.

  11. Perspectives of Community- and Faith-Based Organizations about Partnering with Local Health Departments for Disasters

    Directory of Open Access Journals (Sweden)

    Michael Stajura

    2012-06-01

    Full Text Available Public health emergency planners can better perform their mission if they develop and maintain effective relationships with community- and faith-based organizations in their jurisdictions. This qualitative study presents six themes that emerged from 20 key informant interviews representing a wide range of American community- and faith-based organizations across different types of jurisdictions, organizational types, and missions. This research seeks to provide local health department public health emergency planners with tools to assess and improve their inter-organizational community relationships. The themes identified address the importance of community engagement, leadership, intergroup dynamics and communication, and resources. Community- and faith-based organizations perceive that they are underutilized or untapped resources with respect to public health emergencies and disasters. One key reason for this is that many public health departments limit their engagement with community- and faith-based organizations to a one-way “push” model for information dissemination, rather than engaging them in other ways or improving their capacity. Beyond a reprioritization of staff time, few other resources would be required. From the perspective of community- and faith-based organizations, the quality of relationships seems to matter more than discrete resources provided by such ties.

  12. Mapping the good faith principle in international investment arbitration: Assessment of its substantive and procedural value

    Directory of Open Access Journals (Sweden)

    Đajić Sanja

    2012-01-01

    Full Text Available International investment cases show the frequent use of good faith arguments by both investors and respondent states. These cases also illustrate how parties and tribunals tend to conceptualize the good faith principle which has become an important rule of international investment law. This article will explore recent trends in order to assess the importance of this argument for both parties and at different stages of the proceeding. This article will also provide an overview of responses given by the tribunals faced with good faith arguments. Whereas claimants have traditionally relied on this concept to argue the breach of fair and equitable treatment and legitimate expectations, recent cases such as Inceysa, Phoenix and TSA Spectrum, indicate a new defense strategy for respondent states. Given the fact that investment tribunals have shown willingness to treat the good faith principle as autonomous and as a self-standing standard, the possibilities for respondent states have increased. Respondent states can rely on good faith to deny the right of claimants to seize the tribunal (Article 41(5 of the ICSID Rules, to challenge the jurisdiction of the tribunal or admissibility, to contest the right of the claimant to have a decision in its favor, or to challenge the right to compensation.

  13. Perspectives of community- and faith-based organizations about partnering with local health departments for disasters.

    Science.gov (United States)

    Stajura, Michael; Glik, Deborah; Eisenman, David; Prelip, Michael; Martel, Andrea; Sammartinova, Jitka

    2012-07-01

    Public health emergency planners can better perform their mission if they develop and maintain effective relationships with community- and faith-based organizations in their jurisdictions. This qualitative study presents six themes that emerged from 20 key informant interviews representing a wide range of American community- and faith-based organizations across different types of jurisdictions, organizational types, and missions. This research seeks to provide local health department public health emergency planners with tools to assess and improve their inter-organizational community relationships. The themes identified address the importance of community engagement, leadership, intergroup dynamics and communication, and resources. Community- and faith-based organizations perceive that they are underutilized or untapped resources with respect to public health emergencies and disasters. One key reason for this is that many public health departments limit their engagement with community- and faith-based organizations to a one-way "push" model for information dissemination, rather than engaging them in other ways or improving their capacity. Beyond a reprioritization of staff time, few other resources would be required. From the perspective of community- and faith-based organizations, the quality of relationships seems to matter more than discrete resources provided by such ties.

  14. PRINSIP GOOD FAITH(ITIKAD BAIK DALAM HUKUM KONTRAK BISNIS INTERNASIONAL

    Directory of Open Access Journals (Sweden)

    Mrs. Cindawati

    2014-11-01

    Full Text Available The law of international business contracts is the law of national contract with additional of foreign substances, this principle relevant for the law of  international business contracts. Writer has an interest in the issue what principle good faith in the international business contract law. Principle good faith is honesty in behavior or honesty in trade transaction, which include honesty in fact and honour towards proper trade standards, and honesty in trade transaction. Relations require good faith when contract signatory, but also not yet to close the contracts.   Hukum Kontrak Internasional adalah hukum kontrak nasional yang ada unsur asingnya, prinsip ini relevan bagi Hukum Kontrak Internasional. Penulis tertarik untuk mengkaji dengan permasalahan: apa prinsip good faith(itikad baik dalam hukum kontrak internasional? Prinsip good faith(itikad baik tidak lain adalah “kejujuran” dalam perilaku atau kejujuran dalam bertransaksi dagang, termasuk di dalamnya adalah kejujuran dalam fakta dan penghormatan terhadap standar-standar dagang yang wajar dan transaksi dagang yang jujur. Hubungan mensyaratkan kewajiban itikad baik bukan saja ketika kontrak ditandatangani, tetapi juga sebelum kontrak ditutup.

  15. PRINSIP GOOD FAITH(ITIKAD BAIK DALAM HUKUM KONTRAK BISNIS INTERNASIONAL

    Directory of Open Access Journals (Sweden)

    Mrs. Cindawati

    2014-11-01

    Full Text Available The law of international business contracts is the law of national contract with additional of foreign substances, this principle relevant for the law of  international business contracts. Writer has an interest in the issue what principle good faith in the international business contract law. Principle good faith is honesty in behavior or honesty in trade transaction, which include honesty in fact and honour towards proper trade standards, and honesty in trade transaction. Relations require good faith when contract signatory, but also not yet to close the contracts. Hukum Kontrak Internasional adalah hukum kontrak nasional yang ada unsur asingnya, prinsip ini relevan bagi Hukum Kontrak Internasional. Penulis tertarik untuk mengkaji dengan permasalahan: apa prinsip good faith(itikad baik dalam hukum kontrak internasional? Prinsip good faith(itikad baik tidak lain adalah “kejujuran” dalam perilaku atau kejujuran dalam bertransaksi dagang, termasuk di dalamnya adalah kejujuran dalam fakta dan penghormatan terhadap standar-standar dagang yang wajar dan transaksi dagang yang jujur. Hubungan mensyaratkan kewajiban itikad baik bukan saja ketika kontrak ditandatangani, tetapi juga sebelum kontrak ditutup.

  16. Small Faith-Related Organizations as Partners in Local Social Service Networks

    Directory of Open Access Journals (Sweden)

    David Campbell

    2016-05-01

    Full Text Available Efforts to enlist small faith-related organizations as partners in public service delivery raise many questions. Using community social service networks as the unit of analysis, this paper asks one with broader relevance to nonprofit sector managers: What factors support and constrain effective integration of these organizations into a local service delivery network? The evidence and illustrations come from longitudinal case studies of five faith-related organizations who received their first government contract as part of a California faith-based initiative. By comparing the organizational development and network partnership trajectories of these organizations over more than a decade, the analysis identifies four key variables influencing partnership dynamics and outcomes: organizational niche within the local network; leadership connections and network legitimacy; faith-inspired commitments and persistence; and core organizational competencies and capacities. The evidence supports shifting the focus of faith-based initiatives to emphasize local planning and network development, taking into account how these four variables apply to specific organizations and their community context.

  17. Health promoting behaviors among African American women with faith-based support.

    Science.gov (United States)

    Drayton-Brooks, Shirlee; White, Neva

    2004-01-01

    The purpose of this qualitative exploratory study was to document health perceptions, beliefs and attitudes, intentions and social pressures that influence health promoting behaviors as expressed by community level aggregates of African American women with faith support. Twenty-six African American women from two large urban congregations with an active health ministry program participated in this study. Focus group interviews guided by the Theory of Planned Behavior (Ajzen & Fishbein, 1980 & 1991) were used to identify salient health perceptions, beliefs and attitudes, intentions, and social pressures influencing health-promoting behaviors in African American women with faith-based support. Positive health perceptions, attitudes, and beliefs were identified as important to engaging in a healthy lifestyle. Exercise, well balanced diets, weight reduction and stress management were the most salient health concerns among the respondents. Key referents identified included the pastor, congregational nurses, physicians, and church/family members. Control beliefs among these women reflected salient spiritual and fatalistic beliefs concerning health-promoting behaviors. Trusting relationships, open communication, safe, comfortable, and familiar environments were identified as important considerations when planning health promotion interventions for an African American faith community. Health beliefs, attitudes, and behaviors are not developed outside of social systems, therefore, the facilitation of healthy lifestyle behaviors may be best assessed and influenced within a context of reciprocal social interaction such as in a faith-based community. In the context of a community level aggregate with faith-based support, behaviors to promote a healthy lifestyle may be positively influenced.

  18. The third therapeutic system: faith healing strategies in the context of a generalized AIDS epidemic.

    Science.gov (United States)

    Manglos, Nicolette D; Trinitapoli, Jenny

    2011-03-01

    Faith healing in sub-Saharan Africa has primarily been studied qualitatively among Pentecostal-Charismatic groups, and considered as its own phenomenon with little attention to its relationship to other modes of healing. Using data from Malawi, a religiously diverse African country with high HIV prevalence, we find that faith healing is pervasive across multiple religious traditions. For individuals, attending a faith healing congregation is associated with lower levels of generalized worry about AIDS, and this association is driven by those who switched churches before AIDS became widespread in rural areas. Use of condoms and traditional medicine are, on the other hand, positively associated with worry about AIDS. We argue that faith healing can be understood as a third therapeutic system that coexists with the well-documented biomedical and traditional systems. The success of faith healing approaches lies in their unique ability to combine individual-pragmatic and communal-ritualized aspects of healing to inform interpretations of the AIDS epidemic and its consequences.

  19. Effects of current waveform parameters during droplet transfer on spatter in high speed waveform controlled Short-circuiting GMAW

    Institute of Scientific and Technical Information of China (English)

    Lü Xiaoqing; Cao Biao; Zeng Min; Huang Zenghao

    2005-01-01

    Aim at improving the stability of the Short-circuiting Gas Metal Arc Welding ( GMA W-S) process for the enhanced speed usage, effects of current waveform parameters during short-term on the welding stability have been investigated by experimental method. The welding power source used for the research is an inverter with a special current waveform control. It is shown that the spatter decreases at first then increases with each increase of the low current period, current increase rate and the maximum current limit. The test results are provided for welding of 1 mm and 3 mm mild steel at speed of 1.2 m/min. The stable GMA W-S process under high speed welding condition has been achieved by optimizing the parameters.

  20. Colocated MIMO Radar: Beamforming, Waveform design, and Target Parameter Estimation

    KAUST Repository

    Jardak, Seifallah

    2014-04-01

    Thanks to its improved capabilities, the Multiple Input Multiple Output (MIMO) radar is attracting the attention of researchers and practitioners alike. Because it transmits orthogonal or partially correlated waveforms, this emerging technology outperformed the phased array radar by providing better parametric identifiability, achieving higher spatial resolution, and designing complex beampatterns. To avoid jamming and enhance the signal to noise ratio, it is often interesting to maximize the transmitted power in a given region of interest and minimize it elsewhere. This problem is known as the transmit beampattern design and is usually tackled as a two-step process: a transmit covariance matrix is firstly designed by minimizing a convex optimization problem, which is then used to generate practical waveforms. In this work, we propose simple novel methods to generate correlated waveforms using finite alphabet constant and non-constant-envelope symbols. To generate finite alphabet waveforms, the proposed method maps easily generated Gaussian random variables onto the phase-shift-keying, pulse-amplitude, and quadrature-amplitude modulation schemes. For such mapping, the probability density function of Gaussian random variables is divided into M regions, where M is the number of alphabets in the corresponding modulation scheme. By exploiting the mapping function, the relationship between the cross-correlation of Gaussian and finite alphabet symbols is derived. The second part of this thesis covers the topic of target parameter estimation. To determine the reflection coefficient, spatial location, and Doppler shift of a target, maximum likelihood estimation yields the best performance. However, it requires a two dimensional search problem. Therefore, its computational complexity is prohibitively high. So, we proposed a reduced complexity and optimum performance algorithm which allows the two dimensional fast Fourier transform to jointly estimate the spatial location

  1. Sums of Spike Waveform Features for Motor Decoding

    Directory of Open Access Journals (Sweden)

    Jie Li

    2017-07-01

    Full Text Available Traditionally, the key step before decoding motor intentions from cortical recordings is spike sorting, the process of identifying which neuron was responsible for an action potential. Recently, researchers have started investigating approaches to decoding which omit the spike sorting step, by directly using information about action potentials' waveform shapes in the decoder, though this approach is not yet widespread. Particularly, one recent approach involves computing the moments of waveform features and using these moment values as inputs to decoders. This computationally inexpensive approach was shown to be comparable in accuracy to traditional spike sorting. In this study, we use offline data recorded from two Rhesus monkeys to further validate this approach. We also modify this approach by using sums of exponentiated features of spikes, rather than moments. Our results show that using waveform feature sums facilitates significantly higher hand movement reconstruction accuracy than using waveform feature moments, though the magnitudes of differences are small. We find that using the sums of one simple feature, the spike amplitude, allows better offline decoding accuracy than traditional spike sorting by expert (correlation of 0.767, 0.785 vs. 0.744, 0.738, respectively, for two monkeys, average 16% reduction in mean-squared-error, as well as unsorted threshold crossings (0.746, 0.776; average 9% reduction in mean-squared-error. Our results suggest that the sums-of-features framework has potential as an alternative to both spike sorting and using unsorted threshold crossings, if developed further. Also, we present data comparing sorted vs. unsorted spike counts in terms of offline decoding accuracy. Traditional sorted spike counts do not include waveforms that do not match any template (“hash”, but threshold crossing counts do include this hash. On our data and in previous work, hash contributes to decoding accuracy. Thus, using the

  2. Velocity Structure Determination Through Seismic Waveform Modeling and Time Deviations

    Science.gov (United States)

    Savage, B.; Zhu, L.; Tan, Y.; Helmberger, D. V.

    2001-12-01

    Through the use of seismic waveforms recorded by TriNet, a dataset of earthquake focal mechanisms and deviations (time shifts) relative to a standard model facilitates the investigation of the crust and uppermost mantle of southern California. The CAP method of focal mechanism determination, in use by TriNet on a routine basis, provides time shifts for surface waves and Pnl arrivals independently relative to the reference model. These shifts serve as initial data for calibration of local and regional seismic paths. Time shifts from the CAP method are derived by splitting the Pnl section of the waveform, the first arriving Pn to just before the arrival of the S wave, from the much slower surface waves then cross-correlating the data with synthetic waveforms computed from a standard model. Surface waves interact with the entire crust, but the upper crust causes the greatest effect. Whereas, Pnl arrivals sample the deeper crust, upper mantle, and source region. This natural division separates the upper from lower crust for regional calibration and structural modeling and allows 3-D velocity maps to be created using the resulting time shifts. Further examination of Pnl and other arrivals which interact with the Moho illuminate the complex nature of this boundary. Initial attempts at using the first 10 seconds of the Pnl section to determine upper most mantle structure have proven insightful. Two large earthquakes north of southern California in Nevada and Mammoth Lakes, CA allow the creation of record sections from 200 to 600 km. As the paths swing from east to west across southern California, simple 1-D models turn into complex structure, dramatically changing the waveform character. Using finite difference models to explain the structure, we determine that a low velocity zone is present at the base of the crust and extends to 100 km in depth. Velocity variations of 5 percent of the mantle in combination with steeply sloping edges produces complex waveform variations

  3. Fashion, faith, and fantasy in the new physics of the Universe

    CERN Document Server

    Penrose, Roger

    2016-01-01

    What can fashionable ideas, blind faith, or pure fantasy possibly have to do with the scientific quest to understand the universe? Surely, theoretical physicists are immune to mere trends, dogmatic beliefs, or flights of fancy? In fact, acclaimed physicist and bestselling author Roger Penrose argues that researchers working at the extreme frontiers of physics are just as susceptible to these forces as anyone else. In this provocative book, he argues that fashion, faith, and fantasy, while sometimes productive and even essential in physics, may be leading today's researchers astray in three of the field's most important areas--string theory, quantum mechanics, and cosmology. Arguing that string theory has veered away from physical reality by positing six extra hidden dimensions, Penrose cautions that the fashionable nature of a theory can cloud our judgments of its plausibility. In the case of quantum mechanics, its stunning success in explaining the atomic universe has led to an uncritical faith that it must ...

  4. Business and faith: key community partnerships for school-based health centers.

    Science.gov (United States)

    Juszczak, L; Moody, J K; Vega-Matos, C

    1998-12-01

    School-based health centers need to form partnerships with organizations in the community. These relationships are essential to the viability of the centers because they can provide support and resources. However, benefits should be accrued by all partners, not just the health centers. Although there are many communities for school-based health centers to connect to, this article focuses on two integral ones--communities of business and faith. Key findings from a project formed to develop communication strategies and to generate support from the business community are reviewed. Recommendations for school-based health centers in approaching the business community are provided. Similarities and differences between communities of faith and strategies of develop relationships with these communities are presented. School-based health centers are encouraged to understand the characteristics and priorities of their partners in communities of business and faith, and to pursue strong relationships with both communities.

  5. Loan Portfolio of a Faith-based Microfinance Institution: An Empirical Analysis

    Directory of Open Access Journals (Sweden)

    Najmul HODA

    2014-03-01

    Full Text Available An effective tool of economic development is found in microfinance and is believed to provide sustainable mechanism for poverty alleviation. The microfinance institutions across the world operate on a few established models and have been able to make a considerable impact in the areas of financial inclusion and poverty alleviation. However, the industry also needs innovative models and products to attain the targets set under the Millennium Development Goals. In addition to this, there is a need for client-centered models in order to overcome the problems of client dissatisfaction and loan defaults that have been reported in the recent past. This study focuses on the faith-based model of microfinance that differs from mainstream microfinance basically in terms of the underlying values. Faith-based organizations have a long history of participation in the areas of human development. Apart from charity-based lending, many such organizations are also functioning as microfinance institutions that are successfully delivering financial services to the poor. There is a need to study the procedures and performance of these institutions in order to ascertain their distinctive features and potential. Along with other indicators like outreach, impact, and financial sustainability, loan portfolio of a microfinance institution is also a good indicator of sustainability and throws light upon other important features. The main objective of this study is to understand the loan portfolio of faith-based microfinance institutions. A sample of 100 loan clients was purposively selected from one faith-based microfinance institution. This microfinance institution was selected from the list of faith based institutions generated after the literature review. The factors studied were the loan repayment cycles, general demographics and, the relationship between various factors involved in loan repayment. The study also tries to understand if such institutions have any

  6. Faith Tourism: for a Healthy Environment and a More Sensitive World

    Directory of Open Access Journals (Sweden)

    Veena Sharma

    2013-12-01

    Full Text Available The domain of the ‘religious’ / ‘spiritual’ has become a significant source of revenue production for the tourism industry . Faith-based tourism seems to draw increasing numbers of people who wish to travel not just for leisure, or pleasure, but in search of personal meaning and fulfilment in a postmodern capitalist world. Though undertaken as a physical journey, pilgrimage seems to be embedded in the traveller’s wish for some kind of personal transformation. The journey is often distinguished from regular travel through its inherent call for a letting-go, be it of mental constructs, pathologies, personal and social conditioning, artefacts, logic or behaviour. Perhaps the faith-based ‘tourist’ sustains an attitude of veneration to the place and the path, and becomes sensitive to the environment as well as its inhabitants. One could then ask: does the commercial appropriation of faith-based journeys by the tourism industry contribute positively to the industry and, in larger terms, to humanity in general? Can faith-based tourism lead to a crucial, empathetic shift in awareness, enabling humans to accept one another without prejudice? Can faith-based tourism help to build deeper and permanent trans-class, trans-racial, trans-ethnic and trans-religious connections? Can it transform the tourist from a consumer-voyeur to a responsible participant in the larger ideals of social equality and cultural / environmental preservation? This paper suggests that pilgrimage tourism could in different ways sensitize pilgrim-tourists to ongoing social and environmental crises, and how tour organisers and administrators could promote this wider consciousness by illustrating the religious beliefs and sentiments of faith-based tourists.

  7. Accuracy Assessment for Multi-Channel ECG Waveforms Using Soft Computing Methodologies

    Directory of Open Access Journals (Sweden)

    Menta Srinivasulu

    2014-07-01

    Full Text Available ECG waveform rhythmic analysis is very important. In recent trends, analysis processes of ECG waveform applications are available in smart devices. Still, existing methods are not able to accomplish the complete accuracy assessment while classify the multi-channel ECG waveforms. In this paper, proposed analysis of accuracy assessment of the classification of multi-channel ECG waveforms using most popular Soft Computing algorithms. In this research, main focus is on the better rule generation to analyze the multi-channel ECG waveforms. Analysis is mainly done inSoft Computing methods like the Decision Trees with different pruning analysis, Logistic Model Trees with different regression process and Support Vector Machine with Particle Swarm Optimization (SVM-PSO. All these analysis methods are trained and tested with MIT-BIH 12 channel ECG waveforms. Before trained these methods, MSO-FIR filter should be used as data preprocessing for removal of noise from original multi-channel ECG waveforms. MSO technique is used for automatically finding out the cutoff frequency of multichannel ECG waveforms which is used in low-pass filtering process. The classification performance is discussed using mean squared error, member function, classification accuracy, complexity of design, and area under curve on MIT-BIH data. Additionally, this research work is extended for the samples of multi-channel ECG waveforms from the Scope diagnostic center, Hyderabad. Our study assets the best process using the Soft Computing methods for analysis of multi-channel ECG waveforms.

  8. Amongst the unbelievable: Rage, faith and reason in selected writings by V.S. Naipaul

    Directory of Open Access Journals (Sweden)

    Robert J. Balfour

    2014-02-01

    Full Text Available This article focuses on the representation of faith as conveyed by Naipaul in the course of four travelogues. Drawing on historical scholarship pertaining to Islamic societies in transition, and comparing this to a selection of the literary critical reception that Naipaul’s writing about Islam has evoked, I argue for a revision of literary readings of Naipaul’s travelogues. My premise is that the author’s subject positioning influences both a self-critical as well as more compassionate perspective on the relationship between faith and political transition in developing societies.

  9. Amongst the unbelievable: Rage, faith and reason in selected writings by V.S. Naipaul

    Directory of Open Access Journals (Sweden)

    Robert J. Balfour

    2014-05-01

    Full Text Available This article focuses on the representation of faith as conveyed by Naipaul in the course of four travelogues. Drawing on historical scholarship pertaining to Islamic societies in transition, and comparing this to a selection of the literary critical reception that Naipaul’s writing about Islam has evoked, I argue for a revision of literary readings of Naipaul’s travelogues. My premise is that the author’s subject positioning influences both a self-critical as well as more compassionate perspective on the relationship between faith and political transition in developing societies.

  10. Defender of the Faith – hagiography’s topos in the Orthodox Church

    Directory of Open Access Journals (Sweden)

    Michał Dżega

    2014-12-01

    Full Text Available In this article, the author wanted to show the specific for Orthodoxy – topos Her defender. As demonstratedby this topos is universal for any kind of holiness. Starting from the Martyrs ending the Hierarchs and Ascetics, inthe Orthodox Church, there is a never-ending battle for Purity of the Faith in Christ. In this paper author have shown thethree main determinants for the Fight of Faith: 1 Holy Zeal, 2 Holy Pride and 3 Holy Insubordination. To confirm histhesis the author gives some examples from the history of the Eastern Orthodox Church. At the same time author usingthe patristic and liturgical texts.

  11. Improved analysis of GW150914 using a fully spin-precessing waveform model

    OpenAIRE

    2016-01-01

    This paper presents updated estimates of source parameters for GW150914, a binary black-hole coalescence event detected by the Laser Interferometer Gravitational-wave Observatory (LIGO) in 2015 [Abbott et al. Phys. Rev. Lett. 116, 061102 (2016).]. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] presented parameter estimation of the source using a 13-dimensional, phenomenological precessing-spin model (precessing IMRPhenom) and an 11-dimensional nonprecessing effective-one-body (EOB) mode...

  12. Measuring Attitude toward Theistic Faith: Assessing the Astley-Francis Scale among Christian, Muslim and Secular Youth in England

    Science.gov (United States)

    Francis, Leslie J.; Brockett, Adrian; Village, Andrew

    2013-01-01

    Alongside a family of instruments designed to measure the attitudinal dimension of religion within specific faith contexts (Christianity, Hinduism, Islam, and Judaism), the Astley-Francis Scale of Attitude toward Theistic Faith was designed to assess the attitudinal dimension of religion within a multifaith context. Drawing on a sample of 4338…

  13. Self-Deception in the Classroom: Educational Manifestations of Sartre's Concept of Bad Faith

    Science.gov (United States)

    Blenkinsop, Sean; Waddington, Tim

    2014-01-01

    This article explores an important section of Jean-Paul Sartre's famous early work, "Being and Nothingness." In that section Sartre proposes that part of the human condition is to actively engage in a particular kind of self-deception he calls bad faith. Bad faith is recognized by the obvious inconsistency between the purported…

  14. Self-Deception in the Classroom: Educational Manifestations of Sartre's Concept of Bad Faith

    Science.gov (United States)

    Blenkinsop, Sean; Waddington, Tim

    2014-01-01

    This article explores an important section of Jean-Paul Sartre's famous early work, "Being and Nothingness." In that section Sartre proposes that part of the human condition is to actively engage in a particular kind of self-deception he calls bad faith. Bad faith is recognized by the obvious inconsistency between the purported…

  15. Healthy religiosity and salutary faith : Clarification of concepts from the perspectives of psychology, psychiatry and of theology

    NARCIS (Netherlands)

    Vries-Schot, M.R.; Uden, M.H.F. van; Heitink, G.; Pieper, J.Z.T.

    2008-01-01

    The object of this research is to clarify the concepts 'healthy religiosity' and 'salutary faith' in order to provide criteria for the assessment of a person's faith both in (mental) health care and in pastoral care. Based on the scientific literature, a questionnaire composed according to the Delph

  16. The Woman Image in Men-dominated Society——Analysis of Faith in Young Goodman Brown

    Institute of Scientific and Technical Information of China (English)

    韩红宇

    2015-01-01

    Faith, the woman character in Young Goodman Brown written by American writer Nathaniel Hawthorne, is regarded as the general woman character in the men-dominated society, who owned a low status both in family and society in relation to their male counterparts. This paper aims to analyse the female image represented by Faith based on the theory of androcentrism and feminism.

  17. Measuring Attitude toward Theistic Faith: Assessing the Astley-Francis Scale among Christian, Muslim and Secular Youth in England

    Science.gov (United States)

    Francis, Leslie J.; Brockett, Adrian; Village, Andrew

    2013-01-01

    Alongside a family of instruments designed to measure the attitudinal dimension of religion within specific faith contexts (Christianity, Hinduism, Islam, and Judaism), the Astley-Francis Scale of Attitude toward Theistic Faith was designed to assess the attitudinal dimension of religion within a multifaith context. Drawing on a sample of 4338…

  18. Determine Earthquake Rupture Directivity Using Taiwan TSMIP Strong Motion Waveforms

    Science.gov (United States)

    Chang, Kaiwen; Chi, Wu-Cheng; Lai, Ying-Ju; Gung, YuanCheng

    2013-04-01

    Inverting seismic waveforms for the finite fault source parameters is important for studying the physics of earthquake rupture processes. It is also significant to image seismogenic structures in urban areas. Here we analyze the finite-source process and test for the causative fault plane using the accelerograms recorded by the Taiwan Strong-Motion Instrumentation Program (TSMIP) stations. The point source parameters for the mainshock and aftershocks were first obtained by complete waveform moment tensor inversions. We then use the seismograms generated by the aftershocks as empirical Green's functions (EGFs) to retrieve the apparent source time functions (ASTFs) of near-field stations using projected Landweber deconvolution approach. The method for identifying the fault plane relies on the spatial patterns of the apparent source time function durations which depend on the angle between rupture direction and the take-off angle and azimuth of the ray. These derived duration patterns then are compared with the theoretical patterns, which are functions of the following parameters, including focal depth, epicentral distance, average crustal 1D velocity, fault plane attitude, and rupture direction on the fault plane. As a result, the ASTFs derived from EGFs can be used to infer the ruptured fault plane and the rupture direction. Finally we used part of the catalogs to study important seismogenic structures in the area near Chiayi, Taiwan, where a damaging earthquake has occurred about a century ago. The preliminary results show a strike-slip earthquake on 22 October 1999 (Mw 5.6) has ruptured unilaterally toward SSW on a sub-vertical fault. The procedure developed from this study can be applied to other strong motion waveforms recorded from other earthquakes to better understand their kinematic source parameters.

  19. Full-waveform data for building roof step edge localization

    Science.gov (United States)

    Słota, Małgorzata

    2015-08-01

    Airborne laser scanning data perfectly represent flat or gently sloped areas; to date, however, accurate breakline detection is the main drawback of this technique. This issue becomes particularly important in the case of modeling buildings, where accuracy higher than the footprint size is often required. This article covers several issues related to full-waveform data registered on building step edges. First, the full-waveform data simulator was developed and presented in this paper. Second, this article provides a full description of the changes in echo amplitude, echo width and returned power caused by the presence of edges within the laser footprint. Additionally, two important properties of step edge echoes, peak shift and echo asymmetry, were noted and described. It was shown that these properties lead to incorrect echo positioning along the laser center line and can significantly reduce the edge points' accuracy. For these reasons and because all points are aligned with the center of the beam, regardless of the actual target position within the beam footprint, we can state that step edge points require geometric corrections. This article presents a novel algorithm for the refinement of step edge points. The main distinguishing advantage of the developed algorithm is the fact that none of the additional data, such as emitted signal parameters, beam divergence, approximate edge geometry or scanning settings, are required. The proposed algorithm works only on georeferenced profiles of reflected laser energy. Another major advantage is the simplicity of the calculation, allowing for very efficient data processing. Additionally, the developed method of point correction allows for the accurate determination of points lying on edges and edge point densification. For this reason, fully automatic localization of building roof step edges based on LiDAR full-waveform data with higher accuracy than the size of the lidar footprint is feasible.

  20. Using waveform cross correlation for automatic recovery of aftershock sequences

    Science.gov (United States)

    Bobrov, Dmitry; Kitov, Ivan; Rozhkov, Mikhail

    2017-04-01

    Aftershock sequences of the largest earthquakes are difficult to recover. There can be several hundred mid-sized aftershocks per hour within a few hundred km from each other recorded by the same stations. Moreover, these events generate thousands of reflected/refracted phases having azimuth and slowness close to those from the P-waves. Therefore, aftershock sequences with thousands of events represent a major challenge for automatic and interactive processing at the International Data Centre (IDC) of the Comprehensive Nuclear-Test-Ban Organization (CTBTO). Standard methods of detection and phase association do not use all information contained in signals. As a result, wrong association of the first and later phases, both regular and site specific, produces enormous number of wrong event hypotheses and destroys valid event hypotheses in automatic IDC processing. In turn, the IDC analysts have to reject false and recreate valid hypotheses wasting precious human resources. At the current level of the IDC catalogue completeness, the method of waveform cross correlation (WCC) can resolve most of detection and association problems fully utilizing the similarity of waveforms generated by aftershocks. Array seismic stations of the International monitoring system (IMS) can enhance the performance of the WCC method: reduce station-specific detection thresholds, allow accurate estimate of signal attributes, including relative magnitude, and effectively suppress irrelevant arrivals. We have developed and tested a prototype of an aftershock tool matching all IDC processing requirements and merged it with the current IDC pipeline. This tool includes creation of master events consisting of real or synthetic waveform templates at ten and more IMS stations; cross correlation (CC) of real-time waveforms with these templates, association of arrivals detected at CC-traces in event hypotheses; building events matching the IDC quality criteria; and resolution of conflicts between events

  1. Ultrafast chirped optical waveform recorder using a time microscope

    Science.gov (United States)

    Bennett, Corey Vincent

    2015-04-21

    A new technique for capturing both the amplitude and phase of an optical waveform is presented. This technique can capture signals with many THz of bandwidths in a single shot (e.g., temporal resolution of about 44 fs), or be operated repetitively at a high rate. That is, each temporal window (or frame) is captured single shot, in real time, but the process may be run repeatedly or single-shot. By also including a variety of possible demultiplexing techniques, this process is scalable to recoding continuous signals.

  2. Interferometric full-waveform inversion of time-lapse data

    KAUST Repository

    Sinha, Mrinal

    2017-08-17

    One of the key challenges associated with time-lapse surveys is ensuring the repeatability between the baseline and monitor surveys. Non-repeatability between the surveys is caused by varying environmental conditions over the course of different surveys. To overcome this challenge, we propose the use of interferometric full waveform inversion (IFWI) for inverting the velocity model from data recorded by baseline and monitor surveys. A known reflector is used as the reference reflector for IFWI, and the data are naturally redatumed to this reference reflector using natural reflections as the redatuming operator. This natural redatuming mitigates the artifacts introduced by the repeatability errors that originate above the reference reflector.

  3. Magnetic Field Gradient Waveform Monitoring for Magnetic Resonance

    Science.gov (United States)

    Han, Hui

    Linear magnetic field gradients have played a central role in Magnetic Resonance Imaging (MRI) since Fourier Transform MRI was proposed three decades ago. Their primary function is to encode spatial information into MR signals. Magnetic field gradients are also used to sensitize the image contrast to coherent and/or incoherent motion, to selectively enhance an MR signal, and to minimize image artifacts. Modern MR imaging techniques increasingly rely on the implementation of complex gradient waveforms for the manipulation of spin dynamics. However, gradient system infidelities caused by eddy currents, gradient amplifier imperfections and group delays, often result in image artifacts and other errors (e.g., phase and intensity errors). This remains a critical problem for a wide range of MRI techniques on modern commercial systems, but is of particular concern for advanced MRI pulse sequences. Measuring the real magnetic field gradients, i.e., characterizing eddy currents, is critical to addressing and remedying this problem. Gradient measurement and eddy current calibration are therefore a general topic of importance to the science of MRI. The Magnetic Field Gradient Monitor (MFGM) idea was proposed and developed specifically to meet these challenges. The MFGM method is the heart of this thesis. MFGM methods permit a variety of magnetic field gradient problems to be investigated and systematically remedied. Eddy current effects associated with MR compatible metallic pressure vessels were analyzed, simulated, measured and corrected. The appropriate correction of eddy currents may enable most MR/MRI applications with metallic pressure vessels. Quantitative imaging (1D/2D) with model pressure vessels was successfully achieved by combining image reconstruction with MFGM determined gradient waveform behaviour. Other categories of MR applications with metallic vessels, including diffusion measurement and spin echo SPI T2 mapping, cannot be realized solely by MFGM guided

  4. A complete waveform model for compact binaries on eccentric orbits

    Science.gov (United States)

    Huerta, Eliu; Agarwal, Bhanu; George, Daniel; Kumar, Prayush

    2016-03-01

    The detection of compact binaries with significant eccentricity in the sensitivity band of gravitational wave detectors will provide critical insights on the dynamics and formation channels of these events. In order to search for these systems and place constraints on their rates, we present an inspiral-merger-ringdown time domain waveform model that describes the GW emission from compact binaries on orbits with low to moderate values of eccentricity. We use this model to explore the detectability of these events in the context of advanced LIGO.

  5. The Lazarus project: Plunge waveforms from inspiralling black holes

    Science.gov (United States)

    Baker, J.; Brügmann, B.; Campanelli, M.; Lousto, C.; Takahashi, R.

    2001-10-01

    We study the coalescence of binary black holes from the innermost stable circular orbit down to the final single rotating black hole. We use a technique that combines the full numerical approach to solve Einstein equations, applied in the truly nonlinear regime, and linearized perturbation theory around the final distorted single black hole at later times. We thus produce an estimate for the plunge radiation with a non negligible signal lasting for over t~100M, and we obtain estimates of the total gravitational radiated energy and angular momentum during this process, plunging time, and waveforms. .

  6. Test definitions for the evaluation of digital waveform recorders.

    Energy Technology Data Exchange (ETDEWEB)

    Kromer, Richard Paul (R.P. Kromer Consulting, Albuquerque, NM); Hart, Darren M.; Harris, James Mark

    2007-07-01

    This Test Definition for the Evaluation of Digitizing Waveform Recorders (DWR) defines the process that can be performed as part of the evaluation and testing of geophysical sensors, digitizers, sensor subsystems and geophysical station/array systems. The objectives are to (1) evaluate the overall technical performance of the DWR, measure the distortions introduced by the high resolution digitizers and provide a performance check of the internal calibrator if provided and (2) evaluate the technical performance of the DWR for a specific sensor application. The results of these evaluations can be compared to the manufacturer's specifications and any relevant application requirements or specifications.

  7. An Examination of Common Worship and Ceremonies among the Abrahamic Faiths: Implication for Religious Tolerance in Nigeria

    Directory of Open Access Journals (Sweden)

    Omomia, O. Austin

    2014-07-01

    Full Text Available Abrahamic faiths refer to the three most popular religions that traced their origin to Abraham. These religions are Judaism (the earliest of the three, Christianity and Islam (Islam is commonly adjudged as the most recent.This paper examined the common worship, customs and other religious ceremonies prevalent among the Abrahamic faiths. It also identified the common areas of agreement between the Abrahamic faiths with regards to the common religious related customs. It is on this strength that the paper argued that the Abrahamic faiths should emphasize on areas of unity rather than widen the gulf of disagreement. The paper employed the historical and sociological methods of investigation. It is recommended that the Abrahamic faiths should explore areas of unity in order to strengthen the cord of tolerance and peace in the world in general and Nigeria in particular.

  8. Investigation of Leakage Current Waveforms Recorded in a Coastal High Voltage Substation

    Directory of Open Access Journals (Sweden)

    E. Thalassinakis

    2011-06-01

    Full Text Available Leakage current monitoring is a widely employed technique to monitor the performance of outdoor insulation. The evaluation of leakage current waveforms recorded in the field, offers significant information since insulation’s performance is strongly linked with local conditions, and the waveforms’ shape correlate to different types of surface activity. In this paper, an investigation of leakage current waveforms recorded in a 150 kV coastal Substations suffering which suffers intense marine pollution is presented. Investigation of the recorded waveforms verified the basic waveform shapes described in the literature. Further, several variations of the basic types and complex waveforms, as well as field related waveforms, are presented. The need for added categorization criteria in the case of field measurements is discussed.

  9. Sinusoidal oscillators and waveform generators using modern electronic circuit building blocks

    CERN Document Server

    Senani, Raj; Singh, V K; Sharma, R K

    2016-01-01

    This book serves as a single-source reference to sinusoidal oscillators and waveform generators, using classical as well as a variety of modern electronic circuit building blocks. It provides a state-of-the-art review of a large variety of sinusoidal oscillators and waveform generators and includes a catalogue of over 600 configurations of oscillators and waveform generators, describing their relevant design details and salient performance features/limitations. The authors discuss a number of interesting, open research problems and include a comprehensive collection of over 1500 references on oscillators and non-sinusoidal waveform generators/relaxation oscillators. Offers readers a single-source reference to everything connected to sinusoidal oscillators and waveform generators, using classical as well as modern electronic circuit building blocks; Provides a state-of-the-art review of a large variety of sinusoidal oscillators and waveform generators; Includes a catalog of over 600 configurations of oscillato...

  10. Maximally Flat Waveforms with Finite Number of Harmonics in Class-F Power Amplifiers

    Directory of Open Access Journals (Sweden)

    Anamarija Juhas

    2013-01-01

    Full Text Available In this paper general solution to the problem of finding maximally flat waveforms with finite number of harmonics (maximally flat trigonometric polynomials is provided. Waveform coefficients are expressed in closed form as functions of harmonic orders. Two special cases of maximally flat waveforms (so-called maximally flat even harmonic and maximally flat odd harmonic waveforms, which proved to play an important role in class-F and inverse class-F power amplifier (PA operations, are also considered. For these two special types of waveforms, coefficients are expressed as functions of two parameters only. Closed form expressions for efficiency and power output capability of class-F and inverse class-F PA operations with maximally flat waveforms are also provided as explicit functions of number of a harmonics.

  11. Fast and efficient evaluation of gravitational waveforms via reduced-order spline interpolation

    CERN Document Server

    Galley, Chad R

    2016-01-01

    Numerical simulations of merging black hole binaries produce the most accurate gravitational waveforms. The availability of hundreds of these numerical relativity (NR) waveforms, often containing many higher spherical harmonic modes, allows one to study many aspects of gravitational waves. Amongst these are the response of data analysis pipelines, the calibration of semi-analytical models, the building of reduced-order surrogates, the estimation of the parameters of detected gravitational waves, and the composition of public catalogs of NR waveform data. The large number of generated NR waveforms consequently requires efficient data storage and handling, especially since many more waveforms will be generated at an increased rate in the forthcoming years. In addition, gravitational wave data analyses often require the NR waveforms to be interpolated and uniformly resampled at high sampling rates. Previously, this resulted in very large data files (up to $\\sim$ several GB) in memory-intensive operations, which ...

  12. A Denoising Method for LiDAR Full-Waveform Data

    Directory of Open Access Journals (Sweden)

    Xudong Lai

    2015-01-01

    Full Text Available Decomposition of LiDAR full-waveform data can not only enhance the density and positioning accuracy of a point cloud, but also provide other useful parameters, such as pulse width, peak amplitude, and peak position which are important information for subsequent processing. Full-waveform data usually contain some random noises. Traditional filtering algorithms always cause distortion in the waveform. λ/μ filtering algorithm is based on Mean Shift method. It can smooth the signal iteratively and will not cause any distortion in the waveform. In this paper, an improved λ/μ filtering algorithm is proposed, and several experiments on both simulated waveform data and real waveform data are implemented to prove the effectiveness of the proposed algorithm.

  13. Application of Waveform Factors in Extracting Fault Trend of Rotary Machines

    Institute of Scientific and Technical Information of China (English)

    YE Yu-gang; ZUO Yun-bo; HUANG Xiao-bin

    2009-01-01

    Vibration intensity and non-dimensional amplitude parameters are often used to extract the fault trend of rotary machines. But, they are the parameters related to energy, and can not describe the fault trend because of varying load and conditions or too slight change of vibration signal. For this reason, three non-dimensional parameters are presented, namely waveform repeatability factor, waveform jumping factor and waveform similarity factor, called as waveform factors jointly, which are based on statistics analysis for the waveform and sensitive to the change of signal waveform. When they are used to extract the fault trend of rotary machines as a kind of technology of instrument and meter, they can reflect the fault trend better than the vibration intensity, peak amplitude and margin index.

  14. Arbitrary waveform generator and differentiator employing an integrated optical pulse shaper.

    Science.gov (United States)

    Liao, Shasha; Ding, Yunhong; Dong, Jianji; Yang, Ting; Chen, Xiaolin; Gao, Dingshan; Zhang, Xinliang

    2015-05-04

    We propose and demonstrate an optical arbitrary waveform generator and high-order photonic differentiator based on a four-tap finite impulse response (FIR) silicon-on-insulator (SOI) on-chip circuit. Based on amplitude and phase modulation of each tap controlled by thermal heaters, we obtain several typical waveforms such as triangular waveform, sawtooth waveform, square waveform and Gaussian waveform, etc., assisted by an optical frequency comb injection. Unlike other proposed schemes, our scheme does not require a spectral disperser which is difficult to fabricate on chip with high resolution. In addition, we demonstrate first-, second- and third-order differentiators based on the optical pulse shaper. Our scheme can switch the differentiator patterns from first- to third-order freely. In addition, our scheme has distinct advantages of compactness, capability for integration with electronics.

  15. Radar Constant-Modulus Waveform Design with Prior Information of the Extended Target and Clutter.

    Science.gov (United States)

    Yue, Wenzhen; Zhang, Yan; Liu, Yimin; Xie, Jingwen

    2016-06-17

    Radar waveform design is of great importance for radar system performances and has drawn considerable attention recently. Constant modulus is an important waveform design consideration, both from the point of view of hardware realization and to allow for full utilization of the transmitter's power. In this paper, we consider the problem of constant-modulus waveform design for extended target detection with prior information about the extended target and clutter. At first, we propose an arbitrary-phase unimodular waveform design method via joint transmitter-receiver optimization. We exploit a semi-definite relaxation technique to transform an intractable non-convex problem into a convex problem, which can then be efficiently solved. Furthermore, quadrature phase shift keying waveform is designed, which is easier to implement than arbitrary-phase waveforms. Numerical results demonstrate the effectiveness of the proposed methods.

  16. All-Optical Temporal Differentiator Using a High Resolution Optical Arbitrary Waveform Shaper

    Institute of Scientific and Technical Information of China (English)

    DONG Jian-Ji; LUO Bo-Wen; ZHANG Yin; LEI Lei; HUANG De-Xiu; ZHANG Xin-Liang

    2012-01-01

    We experimentally demonstrate an all-optical temporal differentiator using a high resolution optical arbitrary waveform shaper, which is based on liquid crystal on silicon switching elements, and both amplitude and phase of the spectrum are programmable. By designing specific transfer functions with the optical waveform shaper, we obtain first-, second-, and third-order differentiators for periodic pulses with small average errors. We also theoretically analyze the bandwidth limitation of optical waveform shaper on the differentiator.%We experimentally demonstrate an all-optical temporal differentiator using a high resolution optical arbitrary waveform shaper,which is based on liquid crystal on silicon switching elements,and both amplitude and phase of the spectrum are programmable.By designing specific transfer functions with the optical waveform shaper,we obtain first-,second-,and third-order differentiators for periodic pulses with small average errors.We also theoretically analyze the bandwidth limitation of optical waveform shaper on the differentiator.

  17. Channel Influence Mitigation in Pseudo-noise Waveform Design for Radar Applications

    Directory of Open Access Journals (Sweden)

    J. S. Kulpa

    2014-04-01

    Full Text Available Noise Radar is a rapidly developing technology which uses noise or pseudo-noise waveforms as sounding signals to de- tect targets of interest. The advantages of such waveforms are no range nor velocity ambiguities, the possibility of using continuous waveform and low probability of intercept. However, the noise waveform correlation sidelobes are spread across the entire range–Doppler plane and their level is de- termined by the time-bandwidth product. Such sidelobes limit the detection capability in the multitarget environment. Several algorithms exist that decrease the sidelobe level and thus enhance dynamic range of the radar, but they are very susceptible to distortions in an analogue channel. In this paper the author presents a method to create low-sidelobe waveforms using a filtering algorithm designed for given channel, decreasing the analogue front-end impact on the final properties of the waveforms.

  18. Effects of Forest Disturbances on Forest Structural Parameters Retrieval from Lidar Waveform Data

    Science.gov (United States)

    Ranson, K, Lon; Sun, G.

    2011-01-01

    The effect of forest disturbance on the lidar waveform and the forest biomass estimation was demonstrated by model simulation. The results show that the correlation between stand biomass and the lidar waveform indices changes when the stand spatial structure changes due to disturbances rather than the natural succession. This has to be considered in developing algorithms for regional or global mapping of biomass from lidar waveform data.

  19. FULL WAVEFORM LIDAR EXPLOITATION TECHNIQUE AND ITS EVALUATION IN THE MIXED FOREST HILLY REGION

    OpenAIRE

    Chhatkuli, S.; Mano, K; Kogure, T.; Tachibana, K.; H. Shimamura

    2012-01-01

    In this paper a full waveform exploitation technique and its evaluation in the mixed forest hilly region is presented. The increment in ground penetration by using the full waveform exploitation technique compared to the discrete LiDAR pulses during autumn and winter season is evaluated. The results showed that the technique used for the full waveform exploitation has effectively increased the ground penetration by 50 % and 20 %, respectively, during autumn and winter in the mixed fo...

  20. Hepatic vein Doppler waveform in patients with diffuse fatty infiltration of the liver

    Energy Technology Data Exchange (ETDEWEB)

    Oguzkurt, Levent [Department of Radiology, Adana Teaching and Medical Research Center, Baskent University, Adana 01250 (Turkey)]. E-mail: loguzkurt@yahoo.com; Yildirim, Tulin [Department of Radiology, Adana Teaching and Medical Research Center, Baskent University, Adana 01250 (Turkey); Torun, Dilek [Department of Nephrology, Adana Teaching and Medical Research Center, Baskent University, Adana (Turkey); Tercan, Fahri [Department of Radiology, Adana Teaching and Medical Research Center, Baskent University, Adana 01250 (Turkey); Kizilkilic, Osman [Department of Radiology, Adana Teaching and Medical Research Center, Baskent University, Adana 01250 (Turkey); Niron, E. Alp [Department of Radiology, Baskent University, Ankara (Turkey)

    2005-05-01

    Objective: To determine the incidence of abnormal hepatic vein Doppler waveform in patients with diffuse fatty infiltration of the liver (FIL). Materials and methods: In this prospective study, 40 patients with diffuse FIL and 50 normal healthy adults who served as control group underwent hepatic vein (HV) Doppler ultrasonography. The patients with the diagnosis of FIL were 23 men (57.5%) and 17 women aged 30-62 years (mean age {+-} S.D., 42 {+-} 12 years). Subjects in the control group were 27 men (54%) and 23 women aged 34-65 years (mean age {+-} S.D., 45 {+-} 14 years). The diagnosis of FIL was confirmed with computed tomography density measurements. The waveforms of HV were classified into three groups: regular triphasic waveform, biphasic waveform without a reverse flow, and monophasic or flat waveform. Etiological factors for FIL were diabetes mellitus (DM), hyperlipidemia and obesity (body mass index > 25). Serum lipid profile was obtained from all the patients with FIL. Results: Seventeen of the 40 patients (43%) with FIL had an abnormal HV Doppler waveform, whereas only one of the 50 (2%) healthy subjects had an abnormal waveform. The difference in the distribution of normal Doppler waveform pattern between the patients and the control group was significant (P < 0.001). No differences were found in the behaviour of the hepatic vein Doppler waveform in relation to the different etiologic factors for FIL (P > 0.05). There was not any correlation between the degree of fat infiltration and the hepatic vein waveform pattern (P = 0.60). Conclusion: Patients with fatty liver has a high rate of an abnormal hepatic vein Doppler waveform pattern which can be biphasic or monophasic. We could not find a relation between the etiological factors for FIL and the occurrence of an abnormal HV Doppler waveform.