National Library of Energy BETA

Sample records for trial period applicability

  1. CO2 Abatement in the UK Power Sector: Evidence from the EU ETS Trial Period

    E-Print Network [OSTI]

    Ellerman, A. Denny

    2008-01-01

    This paper provides an empirical assessment of CO2 emissions abatement in the UK power sector during the trial period of the EU ETS. Using an econometrically estimated model of fuel switching, it separates the impacts of ...

  2. Numerical Modeling of Periodic Composite Media for Electromagnetic Shielding Application

    E-Print Network [OSTI]

    Koledintseva, Marina Y.

    on a conventional mixing theory, have served as the fundamentals for these techniques. In these formulationsNumerical Modeling of Periodic Composite Media for Electromagnetic Shielding Application Dagang Wu-difference time-domain (FDTD) method. The results are compared with conventional mixing theories and 3D Fourier

  3. Fabrication and applications of sub-micron 2D and 3D periodic...

    Office of Scientific and Technical Information (OSTI)

    Fabrication and applications of sub-micron 2D and 3D periodic carbon structures. Citation Details In-Document Search Title: Fabrication and applications of sub-micron 2D and 3D...

  4. Sound transmission through a periodic cascade with application to drill pipes

    E-Print Network [OSTI]

    Rienstra, Sjoerd W.

    Sound transmission through a periodic cascade with application to drill pipes Niels J. C. Lous Acoustical data transmission through the wall of drill pipes is considered. Drill pipes are known to behave the frequency domain drill pipe models presented by Barnes and Kirkwood J. Acoust. Soc. Am. 51, 1606­1608 1972

  5. Spectral Pollution and How to Avoid It (With Applications to Dirac and Periodic Schrödinger Operators)

    E-Print Network [OSTI]

    Mathieu Lewin; Eric Séré

    2008-12-11

    This paper, devoted to the study of spectral pollution, contains both abstract results and applications to some self-adjoint operators with a gap in their essential spectrum occuring in Quantum Mechanics. First we consider Galerkin basis which respect the decomposition of the ambient Hilbert space into a direct sum $H=PH\\oplus(1-P)H$, given by a fixed orthogonal projector $P$, and we localize the polluted spectrum exactly. This is followed by applications to periodic Schr\\"odinger operators (pollution is absent in a Wannier-type basis), and to Dirac operator (several natural decompositions are considered). In the second part, we add the constraint that within the Galerkin basis there is a certain relation between vectors in $PH$ and vectors in $(1-P)H$. Abstract results are proved and applied to several practical methods like the famous "kinetic balance" of relativistic Quantum Mechanics.

  6. Photonic-magnonic crystals: Multifunctional periodic structures for magnonic and photonic applications

    SciTech Connect (OSTI)

    K?os, J. W. Krawczyk, M.; Dadoenkova, Yu. S.; Dadoenkova, N. N.; Lyubchanskii, I. L.

    2014-05-07

    We investigate the properties of a photonic-magnonic crystal, a complex multifunctional one-dimensional structure with magnonic and photonic band gaps in the GHz and PHz frequency ranges for spin waves and light, respectively. The system consists of periodically distributed dielectric magnetic slabs of yttrium iron garnet and nonmagnetic spacers with an internal structure of alternating TiO{sub 2} and SiO{sub 2} layers which form finite-size dielectric photonic crystals. We show that the spin-wave coupling between the magnetic layers, and thus the formation of the magnonic band structure, necessitates a nonzero in-plane component of the spin-wave wave vector. A more complex structure perceived by light is evidenced by the photonic miniband structure and the transmission spectra in which we have observed transmission peaks related to the repetition of the magnetic slabs in the frequency ranges corresponding to the photonic band gaps of the TiO{sub 2}/SiO{sub 2} stack. Moreover, we show that these modes split to very high sharp (a few THz wide) subpeaks in the transmittance spectra. The proposed novel multifunctional artificial crystals can have interesting applications and be used for creating common resonant cavities for spin waves and light to enhance the mutual influence between them.

  7. Progress in Large Period Multilayer Coatings for High Harmonic and Solar Applications

    E-Print Network [OSTI]

    Aquila, Andrew

    2008-01-01

    large period multilayer coatings for high harmonic and solarBerkeley, CA 94720 Multilayer coatings for normal incidence

  8. A Time-Periodic Bifurcation Theorem and its Application to Navier-Stokes Flow Past an Obstacle

    E-Print Network [OSTI]

    Giovanni P. Galdi

    2015-08-04

    We show an abstract time-periodic bifurcation theorem in Banach spaces. The key point as well as the novelty of the method is to split the original evolution equation into two different coupled equations, one for the time-average of the sought solution and the other for the "purely periodic" component. This approach may be particularly useful in studying physical phenomena occurring in unbounded spatial regions. Actually, we furnish a significant application of the theorem, by providing sufficient conditions for time-periodic bifurcation from a steady-state flow of a Navier-Stokes liquid past a three-dimensional obstacle.

  9. Trial Application of the Facility Safeguardability Assessment Process to the NuScale SMR Design

    SciTech Connect (OSTI)

    Coles, Garill A.; Gitau, Ernest TN; Hockert, John; Zentner, Michael D.

    2012-11-09

    FSA is a screening process intended to focus a facility designer’s attention on the aspects of their facility or process design that would most benefit from application of SBD principles and practices. The process is meant to identify the most relevant guidance within the SBD tools for enhancing the safeguardability of the design. In fiscal year (FY) 2012, NNSA sponsored PNNL to evaluate the practical application of FSA by applying it to the NuScale small modular nuclear power plant. This report documents the application of the FSA process, presenting conclusions regarding its efficiency and robustness. It describes the NuScale safeguards design concept and presents functional "infrastructure" guidelines that were developed using the FSA process.

  10. Trial Application of the Facility Safeguardability Assessment Process to the NuScale SMR Design

    SciTech Connect (OSTI)

    Coles, Garill A.; Hockert, John; Gitau, Ernest TN; Zentner, Michael D.

    2013-01-26

    FSA is a screening process intended to focus a facility designer’s attention on the aspects of their facility or process design that would most benefit from application of SBD principles and practices. The process is meant to identify the most relevant guidance within the SBD tools for enhancing the safeguardability of the design. In fiscal year (FY) 2012, NNSA sponsored PNNL to evaluate the practical application of FSA by applying it to the NuScale small modular nuclear power plant. This report documents the application of the FSA process, presenting conclusions regarding its efficiency and robustness. It describes the NuScale safeguards design concept and presents functional "infrastructure" guidelines that were developed using the FSA process.

  11. White House Office of Science and Technology Policy Summer 2014 Internship Program Application Period

    Broader source: Energy.gov [DOE]

    The White House Office of Science and Technology Policy is currently accepting applications for its Summer 2014 Internship Program.  The application deadline is 11:59pm Friday, March 7.  Students...

  12. Van der Waals forces from first principles for periodic systems: Application to graphene-water interactions

    E-Print Network [OSTI]

    Pouya Partovi-Azar; T. D. Kühne

    2015-04-17

    We extend the method of Silvestrelli [P. L. Silvestrelli, J. Chem. Phys. 139, 054106 (2013)] to approximate long-range van der Waals interactions at the density functional theory level based on maximally localized Wannier functions combined with the quantum harmonic oscillator model, to periodic systems. Applying this scheme to study London dispersion forces between graphene and water layers, we demonstrate that collective many-body effects beyond simple additive pair-wise interactions are essential to accurately describe van der Waals forces.

  13. Van der Waals forces from first principles for periodic systems: Application to graphene-water interactions

    E-Print Network [OSTI]

    Partovi-Azar, Pouya

    2015-01-01

    We extend the method of Silvestrelli [P. L. Silvestrelli, J. Chem. Phys. 139, 054106 (2013)] to approximate long-range van der Waals interactions at the density functional theory level based on maximally localized Wannier functions combined with the quantum harmonic oscillator model, to periodic systems. Applying this scheme to study London dispersion forces between graphene and water layers, we demonstrate that collective many-body effects beyond simple additive pair-wise interactions are essential to accurately describe van der Waals forces.

  14. The continuous period search method and its application to the young solar analogue HD 116956

    E-Print Network [OSTI]

    Lehtinen, J; Hackman, T; Henry, P Kajatkari G W

    2010-01-01

    Aims: We formulate an improved time series analysis method for the analysis of photometry of active stars. This new Continuous Period Search (CPS) method is applied to 12 years of V band photometry of the young solar analogue HD 116956 (NQ UMa). Methods: The new method is developed from the previous Three Stage Period Analysis (TSPA) method. Our improvements are the use of a sliding window in choosing the modelled datasets, a criterion applied to select the best model for each dataset and the computation of the time scale of change of the light curve. We test the performance of CPS with simulated and real data. Results: The CPS has a much improved time resolution which allows us to better investigate fast evolution of stellar light curves. We can also separate between the cases when the data is best described by periodic (i.e. rotational modulation of brightness) and aperiodic (e.g. constant brightness) models. We find, however, that the performance of the CPS has certain limitations. It does not determine th...

  15. Vector Riemann-Hilbert problem with almost periodic and meromorphic coefficients and applications

    E-Print Network [OSTI]

    Yuri A. Antipov

    2015-04-21

    The vector Riemann-Hilbert problem is analyzed when the entries of its matrix coefficient are meromorphic and almost periodic functions. Three cases for the meromorphic functions, when they have (i) a finite number of poles and zeros (rational functions), (ii) periodic poles and zeros, and (iii) an infinite number of non periodic zeros and poles, are considered. The first case is illustrated by the heat equation for a composite rod with a finite number of discontinuities and a system of convolution equations; both problems are solved explicitly. In the second case, a Wiener-Hopf factorization is found in terms of the hypergeometric functions, and the exact solution of a mixed boundary value problem for the Laplace equation in wedge is derived. In the last case, the Riemann-Hilbert problem reduces to an infinite system of linear algebraic equations with the exponential rate of convergence. As an example, the Neumann boundary value problem for the Helmholtz equation in a strip with a slit is analyzed.

  16. A New Occlusion Device: Application of the ArtVentive Endoluminal Occlusion System (EOS)—First in Human Clinical Trial

    SciTech Connect (OSTI)

    Venbrux, Anthony C.; Rudakov, Leon; Plass, Andre Emmert, Maximilian Y.; Ebner, Adrian

    2013-05-24

    PurposeThe purpose of this study was to determine the safety and efficacy of a new endoluminal occlusion device, ArtVentive endoluminal occlusion system (EOS), to occlude the spermatic vein in symptomatic males with varicoceles.MethodsThe ArtVentive EOS device has been developed for percutaneous, peripheral occlusion of the peripheral arterial and venous vasculature. The system is comprised of an implantable occlusion device and a delivery catheter. At present, there are two device sizes: (a) size 1 for target vessels ranging between 3.5 and 5.5 mm in diameter, and (b) size 2 for target vessels 5.5–8.5 mm in diameter. The treatment group included six adult males, ages 22–34 years. Nine target vessels were occluded. A total of 20 devices were implanted in six subjects.ResultsThe acute occlusion rate at the end of the procedure was 100 % occurring in nine of nine vessels. The spermatic veins of all patients remained occluded on venography at 30 days follow-up. Pain scores related to varicoceles decreased in five of six patients.ConclusionsAlthough we recognize this study is limited, initial experience indicates that the ArtVentive EOS is a safe and effective new device for occlusion of vessels (varicoceles). The device has potential applications in other clinical conditions requiring occlusion of veins or arteries.

  17. Applications of ICP magnetic sector multicollector mass spectrometry to basic energy research. Final report for period December 1st, 1993 - May 31st, 2000

    SciTech Connect (OSTI)

    Halliday, A.N.

    2002-05-01

    The primary aims of this research were threefold: to develop and utilize the new technique of multiple collector inductively coupled plasma mass spectrometry and apply it to problems in the earth, ocean, and environmental sciences; to develop new chronometers and improve existing chronometers to allow the accurate determination of the ages of geological features and processes; and to study natural fluid-mediated mass transfer processes and source of components in the crust and the oceans. This technique has now become the preferred method for the determination of the isotopic compositions of a variety of elements in the periodic table. The prototype instrument was used to explore a vast array of isotopic systems and demonstrate applicability to problems as different as the origin of the solar system and smelting methods in the Bronze Age. Highlights of the program are briefly summarized under the following topics: tungsten isotopes and the early solar system; trace siderophile and chalcophile element geochemistry; hafnium isotopes and the early development of the continents; evolution of lead isotopic compositions of the oceans; the isotopic composition and residence time of Hf in seawater; the isotopic compositions of Sr, Hf, Pb, and Nd in dust; U-Th disequilibrium dating of carbonates and soils; in situ U-Th disequilibrium dating of opal.

  18. Lab 7: Fourier analysis and synthesis Fourier series (periodic phenomena)

    E-Print Network [OSTI]

    Gustafsson, Torgny

    Lab 7: Fourier analysis and synthesis · Fourier series (periodic phenomena) · Fourier transform (aperiodic phenomena) · Fast Fourier transform (FFT) The Fourier Transform and its Applications Brad G A powerful analytic tool that has many applications.... #12;Applications of Fourier analysis Periodic

  19. 44th AIAA Aerospace Sciences Meeting and Exhibit, January 912, 2006 Reno, Nevada Application of the Time Spectral Method to Periodic

    E-Print Network [OSTI]

    Jameson, Antony

    of the body. Practical examples of this type include helicopter rotor blades in forward flight, rotor and efficient computation of periodic unsteady flows. The algorithm has been validated with both 2D and 3D test

  20. Applications of optical parametric downconversion : I. Self-phase locking, [and] II. Generation of entangled photon pairs in periodically-poled lithium niobate

    E-Print Network [OSTI]

    Mason, Elliott J. (Elliot James), 1972-

    2002-01-01

    Nonlinear optics plays a key role in many applications not only as a means of frequency synthesis and control, but also as a source of twin photons and other nonclassical states of light. Advances in nonlinear materials, ...

  1. Storm Water Analytical Period

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

    Individual Permit Storm Water Analytical Period Storm Water Analytical Period The Individual Permit authorizes the discharge of storm water associated with historical industrial...

  2. Pipeline Decommissioning Trial AWE Berkshire UK - 13619

    SciTech Connect (OSTI)

    Agnew, Kieran

    2013-07-01

    This Paper details the implementation of a 'Decommissioning Trial' to assess the feasibility of decommissioning the redundant pipeline operated by AWE located in Berkshire UK. The paper also presents the tool box of decommissioning techniques that were developed during the decommissioning trial. Constructed in the 1950's and operated until 2005, AWE used a pipeline for the authorised discharge of treated effluent. Now redundant, the pipeline is under a care and surveillance regime awaiting decommissioning. The pipeline is some 18.5 km in length and extends from AWE site to the River Thames. Along its route the pipeline passes along and under several major roads, railway lines and rivers as well as travelling through woodland, agricultural land and residential areas. Currently under care and surveillance AWE is considering a number of options for decommissioning the pipeline. One option is to remove the pipeline. In order to assist option evaluation and assess the feasibility of removing the pipeline a decommissioning trial was undertaken and sections of the pipeline were removed within the AWE site. The objectives of the decommissioning trial were to: - Demonstrate to stakeholders that the pipeline can be removed safely, securely and cleanly - Develop a 'tool box' of methods that could be deployed to remove the pipeline - Replicate the conditions and environments encountered along the route of the pipeline The onsite trial was also designed to replicate the physical prevailing conditions and constraints encountered along the remainder of its route i.e. working along a narrow corridor, working in close proximity to roads, working in proximity to above ground and underground services (e.g. Gas, Water, Electricity). By undertaking the decommissioning trial AWE have successfully demonstrated the pipeline can be decommissioned in a safe, secure and clean manor and have developed a tool box of decommissioning techniques. The tool box of includes; - Hot tapping - a method of breaching the pipe while maintaining containment to remove residual liquids, - Crimp and shear - remote crimping, cutting and handling of pipe using the excavator - Pipe jacking - a way of removing pipes avoiding excavations and causing minimal disturbance and disruption. The details of the decommissioning trial design, the techniques employed, their application and effectiveness are discussed and evaluated here in. (authors)

  3. Development of a trial burn plan for a mixed waste fluidized bed incinerator

    SciTech Connect (OSTI)

    Kabot, F.J.; Ziegler, D.L.

    1988-01-01

    One of the more important elements of the incinerator permitting process under RCRA is the development of the Trial Burn Plan. This document describes the incinerator and defines the incinerator's process envelope within which the trial burns will be conducted. The data obtained during the trial burns will be the basis for the incinerator's operating permit. This paper describes the development of the Trial Burn Plan for a unique fluidized bed incinerator to be used for the incineration of hazardous and mixed wastes at the Department of Energy's Rocky Flats Plant. It describes a review process of the Trial Burn Plan involving a public comment period that actually preceded the trial burns. 2 refs., 1 fig.

  4. Time-periodic universes

    E-Print Network [OSTI]

    De-Xing Kong; Kefeng Liu; Ming Shen

    2008-08-30

    In this letter we construct a new time-periodic solution of the vacuum Einstein's field equations whose Riemann curvature norm takes the infinity at some points. We show that this solution is intrinsically time-periodic and describes a time-periodic universe with the "black hole". New physical phenomena are investigated and new singularities are analyzed for this universal model.

  5. Programmatic Essential Functions Clinical Trials

    E-Print Network [OSTI]

    Cheng, Mei-Fang

    current knowledge of industry standards and practices through professional associations1 7-13 Programmatic Essential Functions Clinical Trials Programmatic Standards Observational Standards Communication Standards Intellectual/Conceptual Standards The SHRP-Essential Functions were

  6. Stanford University Glossary of Clinical Trials Terms

    E-Print Network [OSTI]

    Puglisi, Joseph

    to participate in ongoing clinical trials. OFF-LABEL USE A drug prescribed for conditions other than those approved by the FDA. OPEN-LABEL TRIAL A clinical trial in which doctors & participants know which drug labeling. PHASE IV TRIALS Post-marketing studies to delineate additional information including the drug

  7. Multilevel interference lithography--fabricating sub-wavelength periodic nanostructures

    E-Print Network [OSTI]

    Chang, Chih-Hao, 1980-

    2008-01-01

    Periodic nanostructures have many exciting applications, including high-energy spectroscopy, patterned magnetic media, photonic crystals, and templates for self-assembly. Interference lithography (IL) is an attractive ...

  8. Extension of Comment Period on the Draft Integrated, Interagency...

    Energy Savers [EERE]

    of Comment Period on the Draft Integrated, Interagency Pre-Application (IIP) Process for Electric Transmission Projects Requiring Federal Authorizations Extension of Comment...

  9. Genealogy of periodic trajectories

    SciTech Connect (OSTI)

    de Adguiar, M.A.M.; Maldta, C.P.; de Passos, E.J.V.

    1986-05-20

    The periodic solutions of non-integrable classical Hamiltonian systems with two degrees of freedom are numerically investigated. Curves of periodic families are given in plots of energy vs. period. Results are presented for this Hamiltonian: H = 1/2(p/sub x//sup 2/ + p/sub y//sup 2/) + 1/2 x/sup 2/ + 3/2 y/sup 2/ - x/sup 2/y + 1/12 x/sup 4/. Properties of the families of curves are pointed out. (LEW)

  10. Seismic isolation of two dimensional periodic foundations

    SciTech Connect (OSTI)

    Yan, Y.; Mo, Y. L.; Laskar, A.; Cheng, Z.; Shi, Z.; Menq, F.; Tang, Y.

    2014-07-28

    Phononic crystal is now used to control acoustic waves. When the crystal goes to a larger scale, it is called periodic structure. The band gaps of the periodic structure can be reduced to range from 0.5?Hz to 50?Hz. Therefore, the periodic structure has potential applications in seismic wave reflection. In civil engineering, the periodic structure can be served as the foundation of upper structure. This type of foundation consisting of periodic structure is called periodic foundation. When the frequency of seismic waves falls into the band gaps of the periodic foundation, the seismic wave can be blocked. Field experiments of a scaled two dimensional (2D) periodic foundation with an upper structure were conducted to verify the band gap effects. Test results showed the 2D periodic foundation can effectively reduce the response of the upper structure for excitations with frequencies within the frequency band gaps. When the experimental and the finite element analysis results are compared, they agree well with each other, indicating that 2D periodic foundation is a feasible way of reducing seismic vibrations.

  11. Fourier series and periodicity

    E-Print Network [OSTI]

    Donal F. Connon

    2014-12-07

    A large number of the classical texts dealing with Fourier series more or less state that the hypothesis of periodicity is required for pointwise convergence. In this paper, we highlight the fact that this condition is not necessary.

  12. Holding Period Complete

    Broader source: Energy.gov [DOE]

    DOE has published a Final Environmental Impact Statement (EIS), and the 30-day waiting period has ended. DOE is preparing a Record of Decision to announce and explain its chosen project alternative...

  13. Generalized Cost Function Based Forecasting for Periodically Measured Nonstationary Traffic

    E-Print Network [OSTI]

    Zeng, Yong - Department of Mathematics and Statistics, University of Missouri

    1 Generalized Cost Function Based Forecasting for Periodically Measured Nonstationary Traffic true value. However, such a forecast- ing function is not directly applicable for applications potentially result in insufficient allocation of bandwidth leading to short term data loss. To facilitate

  14. Potsdam Thinkshop Poster Proceedings, p. 4345 Rotational periods of very young brown dwarfs in Cha I

    E-Print Network [OSTI]

    Joergens, Viki

    telescope at ESO. We performed aperture photometry and calculated differential magnitudes by means for unevenly spaced data as in our case. The algorithm phase folds the data with a trial period and calculates modulates the total brightness of the star and leads to periodic light vari- Correspondence to: viki@mpe.mpg

  15. Lawyers' Work in the Menendez Brothers' Murder Trial

    E-Print Network [OSTI]

    Bums, Stacy

    1996-01-01

    in the Menendez Brothers' Murder Trial Stacy Bums Universityfirst Menendez brothers' murder trial and analyzes lawyer'sfirst Menendez brothers' murder trial. In this research, I

  16. Technology Development and Field Trials of EGS Drilling Systems...

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

    Technology Development and Field Trials of EGS Drilling Systems Technology Development and Field Trials of EGS Drilling Systems Technology Development and Field Trials of EGS...

  17. Guest Molecule Exchange Kinetics for the 2012 Ignik Sikumi Gas Hydrate Field Trial

    SciTech Connect (OSTI)

    White, Mark D.; Lee, Won Suk

    2014-05-14

    A commercially viable technology for producing methane from natural gas hydrate reservoirs remains elusive. Short-term depressurization field tests have demonstrated the potential for producing natural gas via dissociation of the clathrate structure, but the long-term performance of the depressurization technology ultimately requires a heat source to sustain the dissociation. A decade of laboratory experiments and theoretical studies have demonstrated the exchange of pure CO2 and N2-CO2 mixtures with CH4 in sI gas hydrates, yielding critical information about molecular mechanisms, recoveries, and exchange kinetics. Findings indicated the potential for producing natural gas with little to no production of water and rapid exchange kinetics, generating sufficient interest in the guest-molecule exchange technology for a field test. In 2012 the U.S. DOE/NETL, ConocoPhillips Company, and Japan Oil, Gas and Metals National Corporation jointly sponsored the first field trial of injecting a mixture of N2-CO2 into a CH4-hydrate bearing formation beneath the permafrost on the Alaska North Slope. Known as the Ignik Sikumi #1 Gas Hydrate Field Trial, this experiment involved three stages: 1) the injection of a N2-CO2 mixture into a targeted hydrate-bearing layer, 2) a 4-day pressurized soaking period, and 3) a sustained depressurization and fluid production period. Data collected during the three stages of the field trial were made available after an extensive quality check. These data included continuous temperature and pressure logs, injected and recovered fluid compositions and volumes. The Ignik Sikumi #1 data set is extensive, but contains no direct evidence of the guest-molecule exchange process. This investigation is directed at using numerical simulation to provide an interpretation of the collected data. A numerical simulator, STOMP-HYDT-KE, was recently completed that solves conservation equations for energy, water, mobile fluid guest molecules, and hydrate guest molecules, for up to three gas hydrate guest molecules: CH4, CO2, and N2. The independent tracking of mobile fluid and hydrate guest molecules allows for the kinetic exchange of guest molecules between the mobile fluids and hydrate. The particular interest of this numerical investigation is to determine whether kinetic exchange parameters, determined from laboratory-scale experiments, are directly applicable to interpreting the Ignik Sikumi #1 data.

  18. Application

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications TraditionalWithAntiferromagnetic Spins Do The TwistContract2Application

  19. Applications

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications TraditionalWithAntiferromagnetic Spins Do TheApplication Portingboat ride on

  20. Periodic Reward-Based Scheduling and Its

    E-Print Network [OSTI]

    Aydin, Hakan

    catastrophic. Examples of real-time systems can be found in control systems of nuclear power plants, air36 Periodic Reward-Based Scheduling and Its Application to Power-Aware Real-Time Systems Hakan ........................... 36-9 Modeling Real-Time Workload and Energy on a Variable Speed CPU · Correlating Real-Time Power

  1. Frozen light in periodic metamaterials

    E-Print Network [OSTI]

    A. Figotin; I. Vitebskiy

    2006-09-16

    Wave propagation in spatially periodic media, such as photonic crystals, can be qualitatively different from any uniform substance. The differences are particularly pronounced when the electromagnetic wavelength is comparable to the primitive translation of the periodic structure. In such a case, the periodic medium cannot be assigned any meaningful refractive index. Still, such features as negative refraction and/or opposite phase and group velocities for certain directions of light propagation can be found in almost any photonic crystal. The only reservation is that unlike hypothetical uniform left-handed media, photonic crystals are essentially anisotropic at frequency range of interest. Consider now a plane wave incident on a semi-infinite photonic crystal. One can assume, for instance, that in the case of positive refraction, the normal components of the group and the phase velocities of the transmitted Bloch wave have the same sign, while in the case of negative refraction, those components have opposite signs. What happens if the normal component of the transmitted wave group velocity vanishes? Let us call it a "zero-refraction" case. At first sight, zero normal component of the transmitted wave group velocity implies total reflection of the incident wave. But we demonstrate that total reflection is not the only possibility. Instead, the transmitted wave can appear in the form of an abnormal grazing mode with huge amplitude and nearly tangential group velocity. This spectacular phenomenon is extremely sensitive to the frequency and direction of propagation of the incident plane wave. These features can be very attractive in numerous applications, such as higher harmonic generation and wave mixing, light amplification and lasing, highly efficient superprizms, etc.

  2. Ball Packings with Periodic Constraints

    E-Print Network [OSTI]

    Robert Connelly; Jeffrey D. Shen; Alexander D. Smith

    2013-01-04

    We call a periodic ball packing in d-dimensional Euclidean space periodically (strictly) jammed with respect to a period lattice if there are no nontrivial motions of the balls that preserve the period (that maintain some period with smaller or equal volume). In particular, we call a packing consistently periodically (strictly) jammed if it is periodically (strictly) jammed on every one of its periods. After extending a well-known bar framework and stress condition to strict jamming, we prove that a packing with period Lambda is consistently strictly jammed if and only if it is strictly jammed with respect to Lambda and consistently periodically jammed. We next extend a result about rigid unit mode spectra in crystallography to characterize periodic jamming on sublattices. After that, we prove that there are finitely many strictly jammed packings of m unit balls and other similar results. An interesting example shows that the size of the first sublattice on which a packing is first periodically unjammed is not bounded. Finally, we find an example of a consistently periodically jammed packing of low density \\delta = \\frac{4 \\pi}{6 \\sqrt{3} + 11} + \\epsilon ~ 0.59, where \\epsilon is an arbitrarily small positive number. Throughout the paper, the statements for the closely related notions of periodic infinitesimal rigidity and affine infinitesimal rigidity for tensegrity frameworks are also given.

  3. Linear Scaling Electronic Structure Methods with Periodic Boundary Conditions

    SciTech Connect (OSTI)

    Gustavo E. Scuseria

    2008-02-08

    The methodological development and computational implementation of linear scaling quantum chemistry methods for the accurate calculation of electronic structure and properties of periodic systems (solids, surfaces, and polymers) and their application to chemical problems of DOE relevance.

  4. EFFICIENT DESIGNS OF MULTIPLE SCLEROSIS CLINICAL TRIALS

    E-Print Network [OSTI]

    Brennand, Tracy

    EFFICIENT DESIGNS OF MULTIPLE SCLEROSIS CLINICAL TRIALS by Dean Emile Vrecko B.Sc., University of Science Title of project: Efficient Designs of Multiple Sclerosis Clinical Trials Examining Committee: Dr Multiple sclerosis (MS) is a debilitating disease that attacks the central nervous system. Much research

  5. Dawdon Mine Water Heat Pump Trial

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    14-Dec-12 Dawdon Mine Water Heat Pump Trial #12;14 December 2012 2 Potential for Mine Water sourced heating Dawdon heat pump trial A demonstration project Contents #12;Friday, 14 December 2012 3 The UK salinity High Iron (removed by lime treatment) Offices , 8 rooms #12;Dawdon heat pump Warm mine water

  6. Periodic subsystem density-functional theory

    SciTech Connect (OSTI)

    Genova, Alessandro; Pavanello, Michele; Ceresoli, Davide

    2014-11-07

    By partitioning the electron density into subsystem contributions, the Frozen Density Embedding (FDE) formulation of subsystem Density Functional Theory (DFT) has recently emerged as a powerful tool for reducing the computational scaling of Kohn–Sham DFT. To date, however, FDE has been employed to molecular systems only. Periodic systems, such as metals, semiconductors, and other crystalline solids have been outside the applicability of FDE, mostly because of the lack of a periodic FDE implementation. To fill this gap, in this work we aim at extending FDE to treat subsystems of molecular and periodic character. This goal is achieved by a dual approach. On one side, the development of a theoretical framework for periodic subsystem DFT. On the other, the realization of the method into a parallel computer code. We find that periodic FDE is capable of reproducing total electron densities and (to a lesser extent) also interaction energies of molecular systems weakly interacting with metallic surfaces. In the pilot calculations considered, we find that FDE fails in those cases where there is appreciable density overlap between the subsystems. Conversely, we find FDE to be in semiquantitative agreement with Kohn–Sham DFT when the inter-subsystem density overlap is low. We also conclude that to make FDE a suitable method for describing molecular adsorption at surfaces, kinetic energy density functionals that go beyond the GGA level must be employed.

  7. SUEZ: A Distributed Safe Execution Environment for System Administration Trials

    E-Print Network [OSTI]

    Venkatakrishnan, V.N.

    SUEZ: A Distributed Safe Execution Environment for System Administration Trials Doo San Sim and V of safely and conveniently performing ``trial'' experiments in system administration tasks. System administrators often perform such trial executions that involve installing new software or experimenting

  8. Application of reservoir characterization and advanced technology to improve recovery and economics in a lower quality shallow shelf carbonate reservoir. End of budget period report, August 3, 1994--December 31, 1996

    SciTech Connect (OSTI)

    Taylor, A.R.; Hinterlong, G.; Watts, G.; Justice, J.; Brown, K.; Hickman, T.S.

    1997-12-01

    The Oxy West Welch project is designed to demonstrate how the use of advanced technology can improve the economics of miscible CO{sub 2} injection projects in a lower quality shallow shelf carbonate reservoir. The research and design phase primarily involves advanced reservoir characterization and accelerating the production response. The demonstration phase will implement the reservoir management plan based on an optimum miscible CO{sub 2} flood as designed in the initial phase. During Budget Period 1, work was completed on the CO{sub 2} stimulation treatments and the hydraulic fracture design. Analysis of the CO{sub 2} stimulation treatment provided a methodology for predicting results. The hydraulic fracture treatment proved up both the fracture design approach a and the use of passive seismic for mapping the fracture wing orientation. Although the 3-D seismic interpretation is still being integrated into the geologic model and interpretation of borehole seismic is still underway, the simulator has been enhanced to the point of giving good waterflood history matches. The simulator-forecasted results for an optimal designed miscible CO{sub 2} flood in the demonstration area gave sufficient economics to justify continuation of the project into Budget Period 2.

  9. Representing Periodic Functions by Fourier

    E-Print Network [OSTI]

    Vickers, James

    Representing Periodic Functions by Fourier Series 23.2 Introduction In this Section we show how, then the Fourier series expansion takes the form: f(t) = a0 2 + n=1 (an cos nt + bn sin nt) Our main purpose here Fourier coefficients of a function of period 2 calculate Fourier coefficients of a function of general

  10. Scopes Trial and Fundamentalism in the

    E-Print Network [OSTI]

    . With boyish looks and casual demeanour, Scopes was widely liked around town. His autobiography provides pains to portray townspeople as warm and welcoming. His autobiography also emphasizes the trial

  11. Pepper Variety Trial, Results Summary Summer 2010

    E-Print Network [OSTI]

    New Hampshire, University of

    varieties for yield and quality. This was a replicated trial and the peppers were grown on black plastic mulch. Floating row cover was used to cover half the plants from transplanting until flowering

  12. The Super Period Matrix With Ramond Punctures

    E-Print Network [OSTI]

    Edward Witten

    2015-01-11

    We generalize the super period matrix of a super Riemann surface to the case that Ramond punctures are present. For a super Riemann surface of genus g with 2r Ramond punctures, we define, modulo certain choices that generalize those in the classical theory (and assuming a certain generic condition is satisfied), a g|r x g|r period matrix that is symmetric in the Z_2-graded sense. As an application, we analyze the genus 2 vacuum amplitude in string theory compactifications to four dimensions that are supersymmetric at tree level. We find an explanation for a result that has been found in orbifold examples in explicit computations by D'Hoker and Phong: with their integration procedure, the genus 2 vacuum amplitude always vanishes "pointwise" after summing over spin structures, and hence is given entirely by a boundary contribution.

  13. Shortest recurrence periods of novae

    SciTech Connect (OSTI)

    Kato, Mariko [Department of Astronomy, Keio University, Hiyoshi, Yokohama 223-8521 (Japan); Saio, Hideyuki [Astronomical Institute, Graduate School of Science, Tohoku University, Sendai 980-8578 (Japan); Hachisu, Izumi [Department of Earth Science and Astronomy, College of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902 (Japan); Nomoto, Ken'ichi, E-mail: mariko@educ.cc.keio.ac.jp [Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 (Japan)

    2014-10-01

    Stimulated by the recent discovery of the 1 yr recurrence period nova M31N 2008-12a, we examined the shortest recurrence periods of hydrogen shell flashes on mass-accreting white dwarfs (WDs). We discuss the mechanism that yields a finite minimum recurrence period for a given WD mass. Calculating the unstable flashes for various WD masses and mass accretion rates, we identified a shortest recurrence period of about two months for a non-rotating 1.38 M {sub ?} WD with a mass accretion rate of 3.6 × 10{sup –7} M {sub ?} yr{sup –1}. A 1 yr recurrence period is realized for very massive (? 1.3 M {sub ?}) WDs with very high accretion rates (? 1.5 × 10{sup –7} M {sub ?} yr{sup –1}). We revised our stability limit of hydrogen shell burning, which will be useful for binary evolution calculations toward Type Ia supernovae.

  14. Single-periodic-film optical bandpass filter

    E-Print Network [OSTI]

    Niraula, Manoj; Magnusson, Robert

    2015-01-01

    Resonant periodic surfaces and films enable new functionalities with wide applicability in practical optical systems. Their material sparsity, ease of fabrication, and minimal interface count provide environmental and thermal stability and robustness in applications. Here we report an experimental bandpass filter fashioned in a single patterned layer on a substrate. Its performance corresponds to bandpass filters requiring perhaps 30 traditional thin-film layers as shown by an example. We demonstrate an ultra-narrow, high-efficiency bandpass filter with extremely wide, flat, and low sidebands. This class of devices is designed with rigorous solutions of the Maxwell equations while engaging the physical principles of resonant waveguide gratings. The proposed technology is integration-friendly and opens doors for further development in various disciplines and spectral regions where thin-film solutions are traditionally applied.

  15. Detailed evaluation of the West Kiehl alkaline-surfactant-polymer field project and it`s application to mature Minnelusa waterfloods. Technical progress report for the period of April--June, 1994

    SciTech Connect (OSTI)

    Pitts, M.J.

    1994-09-01

    The objective of this study of the West Kiehl is to (1) quantify the incremental oil produced from the West Kiehl alkaline-surfactant-polymer project by classical engineering and numerical simulation techniques, (2) quantify the effect of chemical slug volume on incremental oil in the two swept areas of the field, (3) determine the economics of the application of the alkaline-surfactant-polymer technology, (4) forecast the results of injecting an alkaline--surfactant-polymer solution to mature waterfloods and polymer floods, and (5) provide the basis for independent operators to book additional oil reserves by using the alkaline-surfactant-polymer technology. This report will document the numerical simulation waterflood, polymer flood, alkaline-surfactant flood and alkaline-surfactant-polymer flood predictions from the West Kiehl and Prairie Creek South fields.

  16. SECTION I. VIRGINIA CORN HYBRID TRIALS IN 1997. Companies Participating in the 1997 Corn Hybrid Trials

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    1 SECTION I. VIRGINIA CORN HYBRID TRIALS IN 1997. Companies Participating in the 1997 Corn Hybrid COLUMBIA PLAINVIEW TX 79072 NORTHRUP KING CO. NORTHRUP KING PO BOX 959 MINNEAPOLIS MN 55440 PIONEER HI, INC. WILSON PO BOX 391 HARLAN IA 51537 VIRGINIA CORN HYBRID TRIALS IN 1997 Coordinated by H. Behl, E

  17. Time-Periodic Solutions of the Einstein's Field Equations II

    E-Print Network [OSTI]

    De-Xing Kong; Kefeng Liu; Ming Shen

    2008-07-31

    In this paper, we construct several kinds of new time-periodic solutions of the vacuum Einstein's field equations whose Riemann curvature tensors vanish, keep finite or take the infinity at some points in these space-times, respectively. The singularities of these new time-periodic solutions are investigated and some new physical phenomena are found. The applications of these solutions in modern cosmology and general relativity can be expected.

  18. Acute bronchodilator responsiveness and health outcomes in COPD patients in the UPLIFT trial

    E-Print Network [OSTI]

    2011-01-01

    in COPD patients in the UPLIFT trial Nicola A Hanania 1*† ,in Function with Tiotropium (UPLIFT ® ) trial, patients hadin Function with Tiotropium (UPLIFT ® ) trial was a 4-year

  19. Analytic aspects of periodic instantons

    E-Print Network [OSTI]

    Charbonneau, Benoit, 1976-

    2004-01-01

    The main result is a computation of the Nahm transform of a SU(2)-instanton over R x T³, called spatially-periodic instanton. It is a singular monopole over T³, a solution to the Bogomolny equation, whose rank is computed ...

  20. Stratified Steady Periodic Water Waves

    E-Print Network [OSTI]

    Samuel Walsh

    2009-02-11

    This paper considers two-dimensional stratified water waves propagating under the force of gravity over an impermeable flat bed and with a free surface. We prove the existence of a global continuum of classical solutions that are periodic and traveling. These waves, moreover, can exhibit large density variation, speed and amplitude.

  1. ANDERSON LOCALIZATION FOR TIME PERIODIC

    E-Print Network [OSTI]

    disorder, Anderson localization in Z d is stable un- der localized time-periodic perturbations by proving random Schrodinger operators at large disorder has been well known since the seminal work of Fr is approximated by the potential V . The equation governing the system is (1.5) i @ @t = (#1; + V ) on Z d #2

  2. Jury Duty: Murder Trial Jerry R. Hobbs

    E-Print Network [OSTI]

    Hobbs, Jerry R.

    Jury Duty: Murder Trial Jerry R. Hobbs The first thing the prosecuting attorney at the murder that 187 is the section of the California Penal Code that defines murder. I asked Christine later if she because she knew too much about DNA. The defense excused a woman whose sister had been murdered

  3. Southern California Trial Plantings of Eucalyptus1

    E-Print Network [OSTI]

    Southern California Trial Plantings of Eucalyptus1 Paul W. Moore2 Following the Arab oil embargo po tential for rapid production of biomass was Eucalyptus. Three species had shown wide adaptation to California soils and microclimates. Eucalyptus globulus was widely planted as windbreaks

  4. Advanced downhole periodic seismic generator

    DOE Patents [OSTI]

    Hardee, Harry C. (Albuquerque, NM); Hills, Richard G. (Las Cruces, NM); Striker, Richard P. (Albuquerque, NM)

    1991-07-16

    An advanced downhole periodic seismic generator system for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

  5. Down hole periodic seismic generator

    DOE Patents [OSTI]

    Hardee, Harry C. (Albuquerque, NM); Hills, Richard G. (Las Cruces, NM); Striker, Richard P. (Albuquerque, NM)

    1989-01-01

    A down hole periodic seismic generator system for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

  6. Phase IIa clinical trial of curcumin for the prevention of colorectal neoplasia.

    E-Print Network [OSTI]

    2011-01-01

    controlled trial of celecoxib in familial adenomatous poly-present study. A trial of celecoxib in familial adenomatous

  7. INDEX TO VIRGINIA CORN HYBRID AND MANAGEMENT TRIALS 1999 SECTION I. VIRGINIA CORN HYBRID TRIALS IN 1999.

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    INDEX TO VIRGINIA CORN HYBRID AND MANAGEMENT TRIALS 1999 SECTION I. VIRGINIA CORN HYBRID TRIALS IN 1999. Companies participating in the 1999 Corn Hybrid Trials 2 1999 Virginia Corn Hybird Plot Information and Management Practices 3 Table 1. 1999 Relative Yield of hybrids entered in three or more

  8. INDEX TO VIRGINIA CORN HYBRID AND MANAGEMENT TRIALS 1998 SECTION I. VIRGINIA CORN HYBRID TRIALS IN 1998.

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    INDEX TO VIRGINIA CORN HYBRID AND MANAGEMENT TRIALS 1998 SECTION I. VIRGINIA CORN HYBRID TRIALS IN 1998. Companies participating in the 1998 Corn Hybrid Trials 2 1998 Virginia Corn Hybird Plot, and 1998. 36 SECTION II. EVALUATION OF DOUBLECROP CORN UNDER IRRIGATION IN EASTERN VIRGINIA. Table 27

  9. Application Periods Open for 2014 National Clean Energy Business...

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

    Your Vote OptiBit's product brings the high bandwidth and energy efficiency of fiber optics to computer chips, helping data centers keep up with ballooning volumes of electronic...

  10. Modeling long-period noise in kinematic GPS applications

    E-Print Network [OSTI]

    Borsa, Adrian A; Minster, J B; Bills, B G; Fricker, H A

    2007-01-01

    show that removing the noise model dramatically attenuatespreferentially return noise models with a spectral index2 after correction for GPS noise model calculated in this

  11. STAR Teaching Program Application Period | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo. 195 -RobSSL IN PRACTICE EDWARD CLARK SSL DESIGN CHALLENGESSTAR

  12. Application Periods Open for 2014 National Clean Energy Business Plan

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12 Beta-3AUDITLeslieAlgaeAnatomy of aofforEnergyCompetition's

  13. Extended Recurrence Plot Analysis and its Application to ERP Data

    E-Print Network [OSTI]

    Marwan, N; Marwan, Norbert; Meinke, Anja

    2004-01-01

    We present new measures of complexity and their application to event related potential data. The new measures base on structures of recurrence plots and makes the identification of chaos-chaos transitions possible. The application of these measures to data from single-trials of the Oddball experiment can identify laminar states therein. This offers a new way of analyzing event-related activity on a single-trial basis.

  14. Extended Recurrence Plot Analysis and its Application to ERP Data

    E-Print Network [OSTI]

    Norbert Marwan; Anja Meinke

    2002-12-20

    We present new measures of complexity and their application to event related potential data. The new measures base on structures of recurrence plots and makes the identification of chaos-chaos transitions possible. The application of these measures to data from single-trials of the Oddball experiment can identify laminar states therein. This offers a new way of analyzing event-related activity on a single-trial basis.

  15. Corn Performance Trials Companies Participating in the 1994 Corn Performance Trials

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    Virginia Corn Performance Trials in 1994 #12;#12;1 Companies Participating in the 1994 Corn IN 46031 CARGILL HYBRID SEEDS CARGILL PO BOX 5645 MINNEAPOLIS MN 55440 CAVERNDALE FARMS INC. CAVERNDALE SCIENCES MYCOGEN 624 27TH ST LUBBOCK TX 79404 NORTHRUP KING CO. NORTHRUP KING 317 330TH ST STANTON MN 55018

  16. Long-period pulses Motivation Developed program Results Long-period disturbances in records of Swiss

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Long-period pulses Motivation Developed program Results Long-period disturbances in records 2014 #12;Long-period pulses Motivation Developed program Results Index 1 Long-period pulses in records 2 Motivation for the study 3 Developed program 4 Results #12;Long-period pulses Motivation Developed

  17. Fungicide control of apple scab: 2010 field trial

    E-Print Network [OSTI]

    Eynard, James; Wunderlich, Lynn; Gubler, W D

    2010-01-01

    communications. 2010 Apple scab field trial, Department ofduring leaf fall to control apple scab (Venturia inaequalis)mixtures on scab control in apple orchards. Plant Pathology

  18. Technology Development and Field Trials of EGS Drilling Systems...

    Open Energy Info (EERE)

    Technology Development and Field Trials of EGS Drilling Systems: PDC Bits Outperform Conventional Bit in Geothermal Drilling Project, Geothermal Resources Council 2012...

  19. The Pursuit of Balance in Sequential Randomized Trials

    E-Print Network [OSTI]

    Guiteras, Raymond P.; Levine, David I.; Polley, Thomas H.

    2015-01-01

    2003). “The pursuit of balance using stratified and dynamicThe Pursuit of Balance in Sequential Randomized Trials ?Mikel (2001). “Randomization, balance, and the validity and

  20. Effective slip boundary conditions for arbitrary periodic surfaces: the surface mobility tensor

    E-Print Network [OSTI]

    Kamrin, Kenneth N.

    In a variety of applications, most notably microfluidics design, slip-based boundary conditions have been sought to characterize fluid flow over patterned surfaces. We focus on laminar shear flows over surfaces with periodic ...

  1. Timeline for HWMs and Above-RHWM Elections (2nd Purchase Period...

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

    31 st of a Rate Case year, for the upcoming Rate Period: 1. Provide updates to forced outage rating, and planned outages. 2. Chooses operating minimum amounts, if applicable....

  2. A Periodic Solution to Impulsive Logistic Equation

    E-Print Network [OSTI]

    Gyong-Chol Kim; Hyong-Chol O; Sang-Mun Kim; Chol Kim

    2014-03-28

    In this paper is provided a new representation of periodic solution to the impulsive Logistic equation considered in [7].

  3. Periods Associated to Algebraic Cycles Spencer Bloch

    E-Print Network [OSTI]

    Bloch, Spencer

    K0(X) = CHp (X)Q Spencer Bloch () Periods Associated to Algebraic Cycles March 3, 2014 Albert) CHp(X, n) := H-n(Zp(X, ·)). Spencer Bloch () Periods Associated to Algebraic Cycles March 3, 2014 ) - Zp (X) CHp(X, n) := H-n(Zp(X, ·)). Spencer Bloch () Periods Associated to Algebraic Cycles March 3

  4. Interrogation of a long-period grating using a mechanically scannable arrayed waveguide grating

    E-Print Network [OSTI]

    Yao, Jianping

    ); published July 16, 2008 A novel technique to interrogate a long-period grating (LPG) using a mechanically of the LPG is measured. An interrogation system with a resolution of 10 pm at a speed of 10 Hz-period-grating (LPG) sensors have found exten- sive applications ranging from temperature monitor- ing, mechanical

  5. Detection of superimposed periodic signals using wavelets

    E-Print Network [OSTI]

    X. Otazu; M. Ribo; M. Peracaula; J. M. Paredes; J. Nunez

    2002-02-05

    In this paper we present a wavelet based algorithm that is able to detect superimposed periodic signals in data with low signal-noise ratio. In this context, the results given by classical period determination methods highly depend on the intrinsic characteristics of each periodic signal, like amplitude or profile. It is then difficult to detect the different periods present in the data set. The results given by the wavelet based method for period determination we present here are independent of the characteristics of the signals.

  6. Patterns of Clinical Trial Eligibility Criteria Krystyna Milian1

    E-Print Network [OSTI]

    ten Teije, Annette

    trials and design of eligibility criteria. In this study we addressed the problem of formalizing for future work related to the formalization of eligibility criteria and supporting their design. 2Patterns of Clinical Trial Eligibility Criteria Krystyna Milian1 , Annette ten Teije1 , Anca Bucur2

  7. TILT POUR TRIALS AND ANALYSIS Bob Bryant1

    E-Print Network [OSTI]

    Beckermann, Christoph

    1 Matrix Metals Keokuk Facility (Keokuk Steel Castings) Keokuk, Iowa 52632 2 Department casting trials. In the tilting molds used for these casting trials, metal is initially poured metal from the holding basin into the casting cavity. Filling a casting cavity through tilting rather

  8. Erratum : The Testosterone Trials: Seven coordinated trials of testosterone treatment in elderly men (Clinical Trials (2014) 11 (362-375) DOI: 10.1177/1740774514524032)

    E-Print Network [OSTI]

    2015-01-01

    California San Fran- cisco Dual Energy X-ray Absorptiometrytrained the trial site dual energy X-ray technicians andIllness Therapy; DXA: Dual Energy X-Ray Absorptiometry. a

  9. Do triatomic molecules echo atomic periodicity?

    SciTech Connect (OSTI)

    Hefferlin, R. Barrow, J.

    2015-03-30

    Demonstrations of periodicity among triatomic-molecular spectroscopic constants underscore the role of the periodic law as a foundation of chemistry. The objective of this work is to prepare for another test using vibration frequencies ?{sub 1} of free, ground-state, main-group triatomic molecules. Using data from four data bases and from computation, we have collected ?{sub 1} data for molecules formed from second period atoms.

  10. Pricing Conspicuous Consumption Products in Recession Periods ...

    E-Print Network [OSTI]

    2012-09-26

    cally used in chemical engineering, e.g., to avoid irreversible reactions in ... Our basic problem is based on an economic setting with a recession period followed.

  11. Inference and Visualization of Periodic Sequences 

    E-Print Network [OSTI]

    Sun, Ying

    2011-10-21

    are evenly spaced in time. The period is estimated by a "leave-out-one-cycle" version of cross-validation (CV) and complements the periodogram, a widely used tool for period estimation. The CV method is computationally simple and implicitly penalizes...

  12. Periodic cellular automata and Bethe ansatz

    E-Print Network [OSTI]

    Atsuo Kuniba; Akira Takenouchi

    2006-01-07

    We review and generalize the recent progress in a soliton cellular automaton known as the periodic box-ball system. It has the extended affine Weyl group symmetry and admits the commuting transfer matrix method and the Bethe ansatz at q=0. Explicit formulas are proposed for the dynamical period and the number of states characterized by conserved quantities.

  13. Latest research findings from petite sismique trials

    SciTech Connect (OSTI)

    Belesky, R.M.; Bieniawski, Z.T.; Greenfield, R.J.

    1984-01-01

    Research on a novel in-situ technique known as petite sismique is discussed. This geophysical method is capable of estimating the static deformation modules of a rock mass. The petite-sismique technique utilizes a seismic-refraction survey stressing a correlation between shear-wave frequency and the static deformation modulus. Although the technique was introduced in 1967, petite sismique has not been used extensively due to difficulties in shear-wave generation and detection. Recent developments in geophysical instrumentation provided an opportunity to evaluate better the technique in this study. With the objective of assessing the deformation modulus, field trials were conducted in coal and limestone mines. Despite attempts to develop a reliable shear-wave source, difficulties in frequency determinations persisted due to source characteristics and receiver resonance. A limited number of shear-wave-frequency observations did not confirm the originally documented relationship between shear-wave frequency and the static deformation modulus. The indicated discrepancy is attributed to differences in characteristics of the sources used in the two studies. Arising out of this research are equipment modifications and procedural recommendations which should improve the chances for success in future studies.

  14. Fungicide control of apple scab: 2007 trial results

    E-Print Network [OSTI]

    Janousek, Christopher N; Lorber, Jacob D; Wunderlich, Lynn; Gubler, W D

    2010-01-01

    from Adaskaveg et al. (2007). Apple trial, 2007. W.D. Gublerpp. MacHardy, W.E. 1996. Apple Scab. Biology, Epidemiology,Pest Management for Apples & Pears. 2 nd ed. University of

  15. Periodic Measurement of Advertising Effectiveness Using Multiple-Test-Period Geo Experiments

    E-Print Network [OSTI]

    Cortes, Corinna

    of ad effectiveness measurements across time. Additionally, the experimental units should rotate betweenPeriodic Measurement of Advertising Effectiveness Using Multiple-Test-Period Geo Experiments Jon experiments to the measurement of advertising effectiveness. One reason this method of measurement

  16. Variable-Period Undulators For Synchrotron Radiation

    DOE Patents [OSTI]

    Shenoy, Gopal (Naperville, IL); Lewellen, John (Plainfield, IL); Shu, Deming (Darien, IL); Vinokurov, Nikolai (Novosibirsk, RU)

    2005-02-22

    A new and improved undulator design is provided that enables a variable period length for the production of synchrotron radiation from both medium-energy and high-energy storage rings. The variable period length is achieved using a staggered array of pole pieces made up of high permeability material, permanent magnet material, or an electromagnetic structure. The pole pieces are separated by a variable width space. The sum of the variable width space and the pole width would therefore define the period of the undulator. Features and advantages of the invention include broad photon energy tunability, constant power operation and constant brilliance operation.

  17. Dynamics of Periodically-kicked Oscillators

    E-Print Network [OSTI]

    Kevin K. Lin; Lai-Sang Young

    2010-04-21

    We review some recent results surrounding a general mechanism for producing chaotic behavior in periodically-kicked oscillators. The key geometric ideas are illustrated via a simple linear shear model.

  18. Impact of Motor Failures on Payback Periods 

    E-Print Network [OSTI]

    Cheek, K. F.; Pillay, P.; Dudley, K. J.

    1995-01-01

    This paper uses MotorMaster and Vaughen's Complete Price Guide to determine payback periods for different motor failure scenarios. Some scenarios considered are rewinds, reconditions, and replacement of bearings. Prices for these repairs...

  19. University of Oregon Libraries Types of Periodicals

    E-Print Network [OSTI]

    Lockery, Shawn

    University of Oregon Libraries Types of Periodicals Scholarly Sources Popular Sources SCHOLARLY American Quarterly RN Automotive News Library Journal Restaurants & Institutions Chemical Engineering News & biographical information Statistics, including forecasts Some book reviews Commentary on political & social

  20. QM/MM description of periodic systems

    E-Print Network [OSTI]

    Doll, K

    2015-01-01

    A QM/MM implementation for periodic systems is reported. This is done for the case of molecules and for systems with two and three-dimensional periodicity, which is suitable to model electrolytes in contact with electrodes. Tests on different water-containing systems, ranging from the water dimer up to liquid water indicate the correctness of the scheme. Furthermore, molecular dynamics simulations are performed, as a possible direction to study realistic systems.

  1. IRC-10443: a multi-periodic SRa variable and the nature of long secondary periods in AGB stars

    E-Print Network [OSTI]

    U. Munari; A. Siviero; P. Ochner; S. Dallaporta; C. Simoncelli

    2008-10-08

    We obtained BVIc photometry of IRC-10443 on 85 different nights distributed over two years, and in addition low resolution absolute spectro- photometry and high resolution Echelle spectroscopy. Our data show that IRC-10443, which was never studied before in any detail, is a SRa variable, characterized by Delta(B)=1.27, Delta(V)=1.14 and Delta(I)=0.70 mag amplitudes and mean values =13.75, =11.33 and =6.18 mag. Two strong periodicities are simultaneously present: a principal one of 85.5 (+/-0.2) days, and a secondary one of 620 (+/-15) days, both sinusoidal in shape, and with semi-amplitudes Delta(V)=0.41 and 0.20 mag, respectively. IRC-10443 turns out to be a M7III star, with a mean heliocentric radial velocity -28 km/s and reddened by E(B-V)=0.87, a third of which of circumstellar origin. The same 0.5 kpc distance is derived from application of the appropriate period-luminosity relations to both the principal and the secondary periods. The long secondary period causes a sinusoidal variation in color of 0.13 mag semi-amplitude in V-Ic, with IRC-10443 being bluest at maximum and reddest at minimum, and with associated changes in effective temperature and radius of 85 K and 6%, respectively. This behavior of colors argues in favor of a pulsation nature for the still mysterious long secondary periods in AGB stars.

  2. The periodicity of the eta Carinae events

    E-Print Network [OSTI]

    A. Damineli; M. F. Corcoran; D. J. Hillier; O. Stahl; R. S. Levenhagen; N. V. Leister; J. H. Groh; M. Teodoro; J. F. Albacete Colombo; F. Gonzalez; J. Arias; H. Levato; M. Grosso; N. Morrell; R. Gamen; G. Wallerstein; V. Niemela

    2007-11-27

    Extensive spectral observations of eta Carinae over the last cycle, and particularly around the 2003.5 low excitation event, have been obtained. The variability of both narrow and broad lines, when combined with data taken from two earlier cycles, reveal a common and well defined period. We have combined the cycle lengths derived from the many lines in the optical spectrum with those from broad-band X-rays, optical and near-infrared observations, and obtained a period length of 2022.7+-1.3 d. Spectroscopic data collected during the last 60 years yield an average period of 2020+-4 d, consistent with the present day period. The period cannot have changed by more than $\\Delta$P/P=0.0007 since 1948. This confirms the previous claims of a true, stable periodicity, and gives strong support to the binary scenario. We have used the disappearance of the narrow component of HeI 6678 to define the epoch of the Cycle 11 minimum, T_0=JD 2,452,819.8. The next event is predicted to occur on 2009 January 11 (+-2 days). The dates for the start of the minimum in other spectral features and broad-bands is very close to this date, and have well determined time delays from the HeI epoch.

  3. Clinical and cost-effectiveness analysis of an open label, single-centre, randomised trial of Spinal Cord Stimulation (SCS) versus Percutaneous Myocardial Laser Revascularisation (PMR) in patients with Refractory Angina Pectoris: the SPiRiT trial

    E-Print Network [OSTI]

    Dyer, Matthew T.; Goldsmith, Kimberley A.; Khan, Sadia N.; Sharples, Linda D.; Freeman, C.; Hardy, I.; Buxton, Martin J.; Schofield, Peter M.

    2008-06-30

    months after proce- dure. Resources consumed solely as a result of the research element of the trial protocol were excluded. All resources were valued at 2005/06 costs. SCS and PMR procedures Both procedures were costed according to the most rele- vant... and ECG tests. For both procedures, the cost of rele- vant procedure-related equipment was added to generate a total mean cost per patient. Patient specific data were collected on length of stay for the immediate period of hospitalisation and appropriate...

  4. APPLICATION OF ICA FOR AUTOMATIC NOISE AND INTERFERENCE CANCELLATION IN MULTISENSORY BIOMEDICAL SIGNALS

    E-Print Network [OSTI]

    Cichocki, Andrzej

    SIGNALS Andrzej Cichocki and Sergiy Vorobyov Lab. for Advanced Brain Signal Processing, Brain Science (trials). Traditional signal processing techniques, such as Wiener ltering, adaptive noise cancelerAPPLICATION OF ICA FOR AUTOMATIC NOISE AND INTERFERENCE CANCELLATION IN MULTISENSORY BIOMEDICAL

  5. ERASMUS EXCHANGE HOUSING APPLICATION FORM

    E-Print Network [OSTI]

    Pfeifer, Holger

    ERASMUS ­ EXCHANGE HOUSING APPLICATION FORM PERSONAL DATA Family Name / Last Name Type your names Permanent Address Street, House Number Postal Code, City Country Phone Number eMail Address MOBILITY August 31. See: www.uni-ulm.de/io/exchange/housing.html Beginning of rental period: End of rental period

  6. 2014 PROGRAM TO ACCELERATE CLINICAL TRIALS (PACT) RFP The true test for new Alzheimer's drugs is in human clinical trials. Numerous treatments for

    E-Print Network [OSTI]

    Charette, André

    2014 PROGRAM TO ACCELERATE CLINICAL TRIALS (PACT) RFP The true test for new Alzheimer's drugs of these potentially successful drugs have not been brought to human trials because of the increased cost and risk Trials (PACT). The goal of this Request for Proposals (RFP) is to increase the number of innovative drugs

  7. Kepler and the long-period variables

    SciTech Connect (OSTI)

    Hartig, Erich; Lebzelter, Thomas [University of Vienna, Department of Astrophysics, Türkenschanzstrasse 17, A-1180 Vienna (Austria); Cash, Jennifer [Department of Biological and Physical Sciences, South Carolina State University, P.O. Box 7024, Orangeburg, SC 29117 (United States); Hinkle, Kenneth H.; Mighell, Kenneth J. [National Optical Astronomy Observatories, P.O. Box 26732, Tucson, AZ 85726 (United States); Walter, Donald K., E-mail: erich.hartig@univie.ac.at, E-mail: thomas.lebzelter@univie.ac.at, E-mail: jcash@physics.scsu.edu, E-mail: hinkle@noao.edu, E-mail: mighell@noao.edu, E-mail: dkw@physics.scsu.edu [Department of Biological and Physical Sciences, South Carolina State University, P.O. Box 7296, Orangeburg, SC 29117 (United States)

    2014-12-01

    High-precision Kepler photometry is used to explore the details of asymptotic giant branch (AGB) light curves. Since AGB variability has a typical timescale on the order of a year, we discuss at length the removal of long-term trends and quarterly changes in Kepler data. Photometry for a small sample of nine semi-regular (SR) AGB stars is examined using a 30 minute cadence over a period of 45 months. While undergoing long-period variations of many magnitudes, the light curves are shown to be smooth at the millimagnitude level over much shorter time intervals. No flares or other rapid events were detected on a sub-day timescale. The shortest AGB period detected is on the order of 100 days. All the SR variables in our sample are shown to have multiple modes. This is always the first overtone, typically combined with the fundamental. A second common characteristic of SR variables is shown to be the simultaneous excitation of multiple closely separated periods for the same overtone mode. Approximately half the sample had a much longer variation in the light curve, likely a long secondary period (LSP). The light curves were all well represented by a combination of sinusoids. However, the properties of the sinusoids are time variable, with irregular variations present at low levels. No non-radial pulsations were detected. It is argued that the LSP variation seen in many SR variables is intrinsic to the star and linked to multiple mode pulsation.

  8. Results of Continuous Load Cell Monitoring Field Trial for UF6 Withdrawals at an Operating Industrial Plant

    SciTech Connect (OSTI)

    Krichinsky, Alan M; Bell, Lisa S; Conchewski, Curtis A; Peters, Benjamin R; Pickett, Chris A; Richardson, Dave; Rowe, Nathan C; Younkin, James R

    2010-01-01

    Continuous load cell monitoring (CLCM) has been implemented and tested for use as a safeguards tool during a 2009 field trial in an operating UF6 transfer facility. The transfer facility is part of the Portsmouth Gaseous Diffusion Plant in Piketon, Ohio, operated by the United States Enrichment Corporation. During the field trial, two process scales for UF{sub 6} cylinders were continuously monitored for a 6-month period as cylinders were being filled. The collected CLCM data were used in testing an event processor serving as a filter for highlighting measurements representing significant operational activities that are important in verifying declared operations. The collection of CLCM data, coupled with rules-based event processing, can provide inspectors with knowledge of a facility's feed and withdrawal activities occurring between site visits. Such process knowledge promises to enhance the effectiveness of safeguards by enabling inspectors to quantitatively compare declared activities directly with process measurements. Selected results of the field trial and event processing will be presented in the context of their value to an independent inspector and a facility operator.

  9. Magnetomechanically induced long period fiber gratings

    SciTech Connect (OSTI)

    Causado-Buelvas, Jesus D.; Gomez-Cardona, Nelson D.; Torres, Pedro

    2008-04-15

    In this work, we report a simple, flexible method to create long period fiber gratings mechanically by controlling the repulsion/attraction force between two magnets that pressing a plate with a periodic array of small glass cylinders to a short length of optical fiber. Via the photoelastic effect, the pressure points induce the required periodic refractive index modulation to create the LPFG. We found that the induced device exhibits spectral characteristics similar to those of other types of LPFG. As the optical properties of LPFGs are directly related to the nature of the applied perturbations, we show, to our knowledge for the frrst time, how is the evolution of birefringence effects in mechanically induced LPFGs.

  10. Sequential conditions for fixed and periodic points 

    E-Print Network [OSTI]

    Peters, Burnis Charles

    1970-01-01

    ) (Member) ~A (Month) 1970 (Year) ~04SQQ ABSTRACT Sec, uential Conditions fo. Fixed and Periodic Points (August 1970) Burnis C. Peter, Jr. , B. A. , Texas ASM University; M. S. , Texas A&M University Directed by: Jack Bryant and L. F. Guseman, Jr.... Let (X, d) be a metric space and f a selfmap of X. It is shown that a number of known theorems on the existence of fixed and periodic points are related through simple properties of the n sequence (f ) of iterates . ACMOVI. EDGEMENTS I wish...

  11. Emergent hyperuniformity in periodically-driven emulsions

    E-Print Network [OSTI]

    Joost H. Weijs; Raphaël Jeanneret; Rémi Dreyfus; Denis Bartolo

    2015-04-28

    We report the emergence of large-scale hyperuniformity in microfluidic emulsions. Upon periodic driving confined emulsions undergo a first-order transition from a reversible to an irreversible dynamics. We evidence that this dynamical transition is accompanied by structural changes at all scales yielding macroscopic yet finite hyperuniform structures. Numerical simulations are performed to single out the very ingredients responsible for the suppression of density fluctuations. We show that as opposed to equilibrium systems the long-range nature of the hydrodynamic interactions are not required for the formation of hyperuniform patterns, thereby suggesting a robust relation between reversibility and hyperuniformity which should hold in a broad class of periodically driven materials.

  12. Two wavelength division multiplexing WAN trials

    SciTech Connect (OSTI)

    Lennon, W.J.; Thombley, R.L.

    1995-01-20

    Lawrence Livermore National Laboratory, as a super-user, supercomputer, and super-application site, is anticipating the future bandwidth and protocol requirements necessary to connect to other such sites as well as to connect to remote-sited control centers and experiments. In this paper the authors discuss their vision of the future of Wide Area Networking, describe the plans for a wavelength division multiplexed link connecting Livermore with the University of California at Berkeley and describe plans for a transparent, {approx} 10 Gb/s ring around San Francisco Bay.

  13. Low-energy expansion formula for one-dimensional Fokker-Planck and Schrödinger equations with asymptotically periodic potentials

    E-Print Network [OSTI]

    Toru Miyazawa

    2011-12-26

    We consider one-dimensional Fokker-Planck and Schr\\"odinger equations with a potential which approaches a periodic function at spatial infinity. We extend the low-energy expansion method, which was introduced in previous papers, to be applicable to such asymptotically periodic cases. Using this method, we study the low-energy behavior of the Green function.

  14. Localization length of nearly periodic layered metamaterials

    E-Print Network [OSTI]

    del Barco, O

    2015-01-01

    We have analyzed numerically the localization length of light $\\xi$ for nearly periodic arrangements of homogeneous stacks (formed exclusively by right-handed materials) and mixed stacks (with alternating right and left-handed metamaterials). Layers with index of refraction $n_1$ and thickness $L_1$ alternate with layers of index of refraction $n_2$ and thickness $L_2$. Positional disorder has been considered by shifting randomly the positions of the layer boundaries with respect to periodic values. For homogeneous stacks, we have shown that the localization length is modulated by the corresponding bands and that $\\xi$ is enhanced at the center of each allowed band. In the limit of long-wavelengths $\\lambda$, the parabolic behavior previously found in purely disordered systems is recovered, whereas for $\\lambda \\ll L_1 + L_2$ a saturation is reached. In the case of nearly periodic mixed stacks with the condition $|n_1 L_1|=|n_2 L_2|$, instead of bands there is a periodic arrangement of Lorenztian resonances, ...

  15. Utility Building Analysis Billing Period: NOV -2013

    E-Print Network [OSTI]

    ELECTRICITY Consumption MUNICIPAL WATER Consumption 8 CCF STEAM Consumption CHILLED WATER Consumption GAS Building Analysis Billing Period: NOV - 2013 032 JACKSON HALL: 150,393 Square Feet ELECTRICITY Consumption,550 Square Feet ELECTRICITY Consumption 114,185 KWHRS MUNICIPAL WATER Consumption 1,423 CCF STEAM Consumption

  16. Quantum transport calculations using periodic boundaryconditions

    SciTech Connect (OSTI)

    Wang, Lin-Wang

    2004-06-15

    An efficient new method is presented to calculate the quantum transports using periodic boundary conditions. This method allows the use of conventional ground state ab initio programs without big changes. The computational effort is only a few times of a normal groundstate calculations, thus is makes accurate quantum transport calculations for large systems possible.

  17. How to Resolve an Ethical Dilemma Concerning Randomized Clinical Trials

    E-Print Network [OSTI]

    Marquis, Don

    1999-08-26

    grant program directors, June 3–4, 1967. Bethes- da, Md.: National Heart Institute, 1967:87-93. 2. Shaw LW, Chalmers TC. Ethics in cooperative clinical trials. Ann N Y Acad Sci 1970;169:487-95. 3. Kolata GB. Clinical trials: methods and ethics... has generated in the media and among people with this disease. First, it is unclear that the patients studied had idiopathic pulmonary fibrosis. 2 The disease is uncommon; consequent- ly, most centers are unable to enroll 18 patients over...

  18. Elsevier Journal Specific Embargo Periods 2013 Journal Name Issn Embargo Period

    E-Print Network [OSTI]

    Ayala-Rincón, Mauricio

    Elsevier Journal Specific Embargo Periods 2013 Journal Name Issn Embargo Period ACADEMIC PEDIATRICS 18762859 12 ACADEMIC RADIOLOGY 10766332 12 ACC CARDIOSOURCE REVIEW JOURNAL 15568571 12 ACCIDENT ANALYSIS 18759637 24 AEROSPACE SCIENCE AND TECHNOLOGY 12709638 24 AESTHETIC SURGERY JOURNAL 1090820X 12 AESTHETISCHE

  19. Beat Cepheid Period Ratios from OPAL Opacities

    E-Print Network [OSTI]

    S. M. Morgan; D. L. Welch

    1997-06-26

    The discovery of a large number of beat Cepheids in the Large Magellanic Cloud in the MACHO survey, provides an opportunity to compare the characteristics of such Cepheids over a range of metallicities. We produced a large grid of linear nonadiabatic pulsation models using the OPAL opacity tables and with compositions corresponding to those of the Milky Way, and the Large and Small Magellanic Clouds. Using the relationship between the period ratio and the main pulsation period, we are able to define a range of models which correspond to the observed beat Cepheids, and thereby constrain the physical characteristics of the LMC beat Cepheids. We are also able to make some predictions about the nature of the yet-to-be-discovered SMC beat Cepheids.

  20. Short-Period RF Undulator for a SASE Nanometer source

    SciTech Connect (OSTI)

    Jay L. Hirshfield

    2001-12-21

    Analysis is described towards development of a RF undulator with a period < 1 cm, an undulator parameter K of the order of unity, and a gap greater than 2.25 mm. The application for the undulator is for a SASE source to produce 1 nm wavelength radiation using a low energy electron beam in the range 1-2 GeV. Particle orbit calculations in a conventional standing-wave resonator configuration show that the presence of a co-propagating component of RF field can cause deleterious motion for the undulating electrons that can seriously degrade their radiation spectrum. To obviate this problem, resonator designs were devised in which only the counter-propagating field components interact with the particles. Two resonator configurations with the same undulator parameter K = 0.4 have been devised and are described in this report.

  1. Contention-Free Periodic Message Scheduler Medium Access Control in Wireless Sensor / Actuator Networks

    E-Print Network [OSTI]

    Barua, Rajeev

    , and chemical content to enable precise application of agents such as water, fertilizer, and pesticideContention-Free Periodic Message Scheduler Medium Access Control in Wireless Sensor / Actuator implemented with a contention-free message scheduler. A message scheduler is used to determine which message

  2. Adverse health consequences in COPD patients with rapid decline in FEV1 - evidence from the UPLIFT trial

    E-Print Network [OSTI]

    Kesten, Steven; Celli, Bartolome; Decramer, Marc; Liu, Dacheng; Tashkin, Donald

    2011-01-01

    of tiotropium in COPD: the UPLIFT trial. COPD 2004, 6.FEV 1 - evidence from the UPLIFT trial. Respiratory Researchin FEV 1 - evidence from the UPLIFT trial Steven Kesten 1* ,

  3. Policy Flash 2013-41 Contracts Periods of Performance Exceeding...

    Energy Savers [EERE]

    1 Contracts Periods of Performance Exceeding 5 Years Policy Flash 2013-41 Contracts Periods of Performance Exceeding 5 Years Attached is Policy Flash 2013-41 Contracts Periods of...

  4. Emissions from Idling Trucks for Extended Time Periods | Department...

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

    Idling Trucks for Extended Time Periods Emissions from Idling Trucks for Extended Time Periods 2002 DEER Conference Presentation: Oak Ridge National Laboratory 2002deerlewis.pdf...

  5. Microsoft Word - Alcoa Extended Initial Period ROD - 2010-10...

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

    Extended Initial Period... 6 b. Benefits to BPA will equal or exceed costs for the Extended Initial Period of the Block Contract. ......

  6. DOE Extends Public Comment Period for the Draft Uranium Leasing...

    Energy Savers [EERE]

    Extends Public Comment Period for the Draft Uranium Leasing Program Programmatic Environmental Impact Statement DOE Extends Public Comment Period for the Draft Uranium Leasing...

  7. Translational Medicine and Clinical Trial E-paper 15 2015 9

    E-Print Network [OSTI]

    Wu, Yih-Min

    Translational Medicine and Clinical Trial E-paper 15 2015 9 NIH 9 7 (Clinical Data Medicine and Clinical Trial E-paper 15 2015 9 (CDISC) (Clinical Data Interchange Standards Consortium CDISC (JMP Clinical of SAS) Page 2 #12; Translational Medicine and Clinical Trial E-paper Page 3 15

  8. A simple classification tool for single-trial analysis of ERP components Christoph Bandt1

    E-Print Network [OSTI]

    Bandt, Christoph

    A simple classification tool for single-trial analysis of ERP components Christoph Bandt1 , Mathias: Single trial analysis of ERP components Corresponding author: Prof. Christoph Bandt Institute-mail: bandt@uni-greifswald.de #12;Single trial analysis of ERP components 2 Abstract Event-related potentials

  9. Residential GSHPs: Efficiency With Short Payback Periods

    SciTech Connect (OSTI)

    Cooperman, Alissa; Dieckmann, John; Brodrick, James

    2012-04-30

    This article discusses ground source heat pumps (GSHPs) for residential application as an alternative to conventional HVAC systems. A listing of current space heating energy sources are presented which are then followed by a technology overview as advances have made GSHPs more efficient. The article concludes with potential energy savings offered by GSHPs and a brief market overview.

  10. The periodic standing-wave approximation: post-Minkowski computation

    E-Print Network [OSTI]

    Christopher Beetle; Benjamin Bromley; Napoleón Hernández; Richard H. Price

    2007-08-08

    The periodic standing wave method studies circular orbits of compact objects coupled to helically symmetric standing wave gravitational fields. From this solution an approximation is extracted for the strong field, slowly inspiralling motion of black holes and binary stars. Previous work on this model has dealt with nonlinear scalar models, and with linearized general relativity. Here we present the results of the method for the post-Minkowski (PM) approximation to general relativity, the first step beyond linearized gravity. We compute the PM approximation in two ways: first, via the standard approach of computing linearized gravitational fields and constructing from them quadratic driving sources for second-order fields, and second, by solving the second-order equations as an ``exact'' nonlinear system. The results of these computations have two distinct applications: (i) The computational infrastructure for the ``exact'' PM solution will be directly applicable to full general relativity. (ii) The results will allow us to begin supplying initial data to collaborators running general relativistic evolution codes.

  11. Down-hole periodic seismic generator

    DOE Patents [OSTI]

    Hardee, H.C.; Hills, R.G.; Striker, R.P.

    1982-10-28

    A down hole periodic seismic generator system is disclosed for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

  12. Property:TimePeriod | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EIS Report Url JumpTechnology Jump to: navigation, search ThisTimePeriod

  13. Electromagnetic Siegert states for periodic dielectric structures

    E-Print Network [OSTI]

    Friends R. Ndangali; Sergei V. Shabanov

    2011-08-09

    The formalism of Siegert states to describe the resonant scattering in quantum theory is extended to the resonant scattering of electromagnetic waves on periodic dielectric arrays. The excitation of electromagnetic Siegert states by an incident wave packet and their decay is studied. The formalism is applied to develop a theory of coupled electromagnetic resonances arising in the electromagnetic scattering problem for two such arrays separated by a distance 2h (or, generally, when the physical properties of the scattering array depend on a real coupling parameter h). Analytic properties of Siegert states as functions of the coupling parameter h are established by the Regular Perturbation Theorem which is an extension the Kato-Rellich theorem to the present case. By means of this theorem, it is proved that if the scattering structure admits a bound state in the radiation continuum at a certain value of the coupling parameter h, then there always exist regions within the structure in which the near field can be amplified as much as desired by adjusting the value of h. This establishes a rather general mechanism to control and amplify optical nonlinear effects in periodically structured planar structures possessing a nonlinear dielectric susceptibility.

  14. Dynamical system theory of periodically collapsing bubbles

    E-Print Network [OSTI]

    Yukalov, V I; Sornette, D

    2015-01-01

    We propose a reduced form set of two coupled continuous time equations linking the price of a representative asset and the price of a bond, the later quantifying the cost of borrowing. The feedbacks between asset prices and bonds are mediated by the dependence of their "fundamental values" on past asset prices and bond themselves. The obtained nonlinear self-referencing price dynamics can induce, in a completely objective deterministic way, the appearance of periodically exploding bubbles ending in crashes. Technically, the periodically explosive bubbles arise due to the proximity of two types of bifurcations as a function of the two key control parameters $b$ and $g$, which represent, respectively, the sensitivity of the fundamental asset price on past asset and bond prices and of the fundamental bond price on past asset prices. One is a Hopf bifurcation, when a stable focus transforms into an unstable focus and a limit cycle appears. The other is a rather unusual bifurcation, when a stable node and a saddle...

  15. Absorption Cycle Fundamentals and Applications Guidelines for Distillation Energy Savings 

    E-Print Network [OSTI]

    Erickson, D. C.; Davidson, W. F.

    1984-01-01

    of applications, embody characteristics that inherently make them economic candidates for absorption cycle heat upgrading. Practical applications to current U.S. distillations could save 30 trillion BTU per year, at payback periods ranging from 1 to 3 years. So...

  16. Quarterly Construction Status Report Period Ending: December 31, 2014

    E-Print Network [OSTI]

    Alpay, S. Pamir

    Cast Stone Replacement 901833 Quarterly Construction Status Report for Period Ending: December 31, 2014

  17. A field expansions method for scattering by periodic multilayered media

    E-Print Network [OSTI]

    Malcolm, Alison E.

    2010-01-01

    The interaction of acoustic and electromagnetic waves with periodic structures plays an important role

  18. Optimal Time-Trial Bicycle Racing with Headwinds and Tailwinds

    E-Print Network [OSTI]

    Anton, A Brad

    2013-01-01

    Many time-trial and triathlon bicycle races take place on relatively flat, closed-circuit courses. In the absence of hills, riding-speed is limited almost solely by aerodynamic drag; consequently, winds can have a big effect on elapsed times. I analyze the special case of a straight out-and-back race in a steady wind, assuming the rider has a given total amount of energy to expend and can choose only two speeds - the aided speed with tailwind and the hindered speed into headwind. In this ideal circumstance the problem of choosing optimal riding speeds reduces to a constrained nonlinear optimization that can be solved with elementary calculus. My analysis reveals a practical rule of thumb that can be used more generally to choose optimal riding speeds for time-trial racing on closed-circuit courses in the presence of headwinds and tailwinds.

  19. Equilibrium quasi-periodic configurations with resonant frequencies in quasi-periodic media I: perturbative expansions

    E-Print Network [OSTI]

    Xifeng Su; Lei Zhang; Rafael de la Llave

    2015-03-11

    We consider 1-D quasi-periodic Frenkel-Kontorova models (describing, for example, deposition of materials in a quasi-periodic substratum). We study the existence of equilibria whose frequency (i.e. the inverse of the density of deposited material) is resonant with the frequencies of the substratum. We study perturbation theory for small potential. We show that there are perturbative expansions to all orders for the quasi-periodic equilibria with resonant frequencies. Under very general conditions, we show that there are at least two such perturbative expansions for equilibria for small values of the parameter. We also develop a dynamical interpretation of the equilibria in these quasi-periodic media. We show that the dynamical system has very unusual properties. Using these, we obtain results on the Lyapunov exponents of the resonant quasi-periodic solutions. In a companion paper, we develop a rather unusual KAM theory (requiring new considerations) which establishes that the perturbative expansions converge when the perturbing potentials satisfy a one-dimensional constraint.

  20. Quasi-periodic oscillations of perturbed tori

    E-Print Network [OSTI]

    Parthasarathy, Varadarajan; Kluzniak, Wlodek

    2015-01-01

    We performed axisymmetric hydrodynamic simulations of perturbed tori orbiting a black hole. The tori in equilibrium were constructed with a constant distribution of angular momentum in a pseudo-Newtonian potential (Klu{\\'z}niak-Lee). Epicyclic motions were triggered by adding sub-sonic velocity fields: radial, vertical and diagonal to the tori in equilibrium. As the perturbed tori evolved in time, we measured $L_{2}$ norm of density and obtained the power spectrum of $L_{2}$ norm which manifested eigenfrequencies of tori modes. We observe a pair of modes which occur in an approximate 3:2 ratio. Results from our simulations are relevant in the context of high-frequency quasi-periodic oscillations (HF QPOs) observed in stellar-mass black hole binaries.

  1. Periodic Arrays of M2-Branes

    E-Print Network [OSTI]

    Imtak Jeon; Neil Lambert; Paul Richmond

    2012-11-29

    We consider periodic arrays of M2-branes in the ABJM model in the spirit of a circle compactification to D2-branes in type IIA string theory. The result is a curious formulation of three-dimensional maximally supersymmetric Yang-Mills theory in terms of fermions, seven transverse scalars, a non-dynamical gauge field and an additional scalar `dual gluon'. Upon further T-duality on a transverse torus we obtain a non-manifest-Lorentz-invariant description of five-dimensional maximally supersymmetric Yang-Mills. Here the additional scalar field can be thought of as the components of a two-form along the torus. This action can be viewed as an M-theory description of M5-branes on ${\\mathbb T}^3$.

  2. Design for manufacturing: application of collaborative multidisciplinary decision making methodology

    E-Print Network [OSTI]

    Seepersad, Carolyn Conner

    EO 1623 Design for manufacturing: application of collaborative multidisciplinary decision making-963-6900/912-966-7910. #12;Abstract Design for manufacturing is often difficult for mechanical parts since significant manufacturing knowledge is required to adjust part designs for manufacturability. The traditional trial

  3. Complete Chaotic Mixing in an Electro-osmotic Flow by Destabilization of Key Periodic Pathlines

    E-Print Network [OSTI]

    R. Chabreyrie; C. Chandre; P. Singh; N. Aubry

    2011-02-07

    The ability to generate complete, or almost complete, chaotic mixing is of great interest in numerous applications, particularly for microfluidics. For this purpose, we propose a strategy that allows us to quickly target the parameter values at which complete mixing occurs. The technique is applied to a time periodic, two-dimensional electro-osmotic flow with spatially and temporally varying Helmoltz-Smoluchowski slip boundary conditions. The strategy consists of following the linear stability of some key periodic pathlines in parameter space (i.e., amplitude and frequency of the forcing), particularly through the bifurcation points at which such pathlines become unstable.

  4. Physics Division progress report for period ending September 30, 1984

    SciTech Connect (OSTI)

    Livingston, A.B. (ed.)

    1985-01-01

    The research activities of the Division are centered primarily in three areas: experimental nuclear physics, experimental atomic physics, and theoretical nuclear and atomic physics. The largest of these efforts, experimental nuclear physics, is dominated by the heavy ion research program. A major responsibility under this program is the operation of the Holifield Heavy Ion Research Facility as a national user facility. During the period of this report, the facility has begun routine operation for the experimental program. The experimental atomic physics program has two components: the accelerator-based studies of basic collisional phenomena and the studies in support of the controlled fusion program. Also associated with the fusion-related studies are a plasma diagnostics program and the operation of an atomic physics data center. The theoretical physics program, both nuclear and atomic, is covered. This program has benefited this year from the success of the VAX-AP computer system and from the increase in manpower provided by the ORNL/University of Tennessee Distinguished Scientist Program. Smaller programs in applications and high-energy physics are summarized. During the period of this report, we continued to explore possible future extensions of the Holifield Facility. We retain a strong interest in a relativistic heavy-ion collider in the 10 x 10 GeV/nuclear energy range. The ideas for such a facility, described in last year's report, have been modified to utilize the HHIRF 25 MV tandem accelerator as the first stage. Finally, the report concludes with some general information on publications, Division activities, and personnel changes.

  5. Technology Development and Field Trials of EGS Drilling Systems at Chocolate Mountain

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Steven Knudsen

    2012-01-01

    Polycrystalline diamond compact (PDC) bits are routinely used in the oil and gas industry for drilling medium to hard rock but have not been adopted for geothermal drilling, largely due to past reliability issues and higher purchase costs. The Sandia Geothermal Research Department has recently completed a field demonstration of the applicability of advanced synthetic diamond drill bits for production geothermal drilling. Two commercially-available PDC bits were tested in a geothermal drilling program in the Chocolate Mountains in Southern California. These bits drilled the granitic formations with significantly better Rate of Penetration (ROP) and bit life than the roller cone bit they are compared with. Drilling records and bit performance data along with associated drilling cost savings are presented herein. The drilling trials have demonstrated PDC bit drilling technology has matured for applicability and improvements to geothermal drilling. This will be especially beneficial for development of Enhanced Geothermal Systems whereby resources can be accessed anywhere within the continental US by drilling to deep, hot resources in hard, basement rock formations.

  6. Periodic relativity: basic framework of the theory

    E-Print Network [OSTI]

    Vikram H. Zaveri

    2014-11-25

    An alternative gravity theory is proposed which does not rely on Riemannian geometry and geodesic trajectories. The theory named periodic relativity (PR) does not use the weak field approximation and allows every two body system to deviate differently from the flat Minkowski metric. PR differs from general relativity (GR) in predictions of the proper time intervals of distant objects. PR proposes a definite connection between the proper time interval of an object and gravitational frequency shift of its constituent particles as the object travels through the gravitational field. PR is based on the dynamic weak equivalence principle which equates the gravitational mass with the relativistic mass. PR provides very accurate solutions for the Pioneer anomaly and the rotation curves of galaxies outside the framework of general relativity. PR satisfies Einstein's field equations with respect to the three major GR tests within the solar system and with respect to the derivation of Friedmann equation in cosmology. This article defines the underlying framework of the theory.

  7. Periods and damping rates of fast sausage oscillations in multi-shelled coronal loops

    E-Print Network [OSTI]

    Chen, Shao-Xia; Xia, Li-Dong; Yu, Hui

    2015-01-01

    Standing sausage modes are important in interpreting quasi-periodic pulsations in the lightcurves of solar flares. Their periods and damping times play an important role in seismologically diagnosing key parameters like the magnetic field strength in regions where flare energy is released. Usually such applications are based on theoretical results neglecting unresolved fine structures in magnetized loops. However, the existence of fine structuring is suggested on both theoretical and observational grounds. Adopting the framework of cold magnetohydrodynamics (MHD), we model coronal loops as magnetized cylinders with a transverse equilibrium density profile comprising a monolithic part and a modulation due to fine structuring in the form of concentric shells. The equation governing the transverse velocity perturbation is solved with an initial-value-problem approach, and the effects of fine structuring on the periods $P$ and damping times $\\tau$ of global, leaky, standing sausage modes are examined. A parameter...

  8. Chemical Technology Division progress report for the period April 1, 1985 to December 31, 1986

    SciTech Connect (OSTI)

    Not Available

    1987-08-01

    This progress report summarizes the research and development efforts conducted in the Chemical Technology Division (Chem Tech) during the period April 1, 1985, through December 31, 1986. The following major areas are covered in the discussion: nuclear and chemical waste management, environmental control technology, basic science and technology, biotechnology research, transuranium-element processing, Nuclear Regulatory Commission programs, radioactive materials production, computer/engineering applications, fission energy, environmental cleanup projects, and various other work activities. As an appendix, the Administrative Summary presents a comprehensive compilation of publications, oral presentations, awards and recognitions, and patents of Chem Tech staff members during this report period. An organization chart, a staffing level and financial summary, and lists of seminars and Chem Tech consultants for the period are also included to provide additional information. 78 figs., 40 tabs.

  9. Entrainment control of chaos near unstable periodic orbits

    E-Print Network [OSTI]

    R. Mettin

    1996-10-16

    It is demonstrated that improved entrainment control of chaotic systems can maintain periodic goal dynamics near unstable periodic orbits without feedback. The method is based on the optimization of goal trajectories and leads to small open-loop control forces.

  10. Large deviations for quasi-periodic cocycles with singularities

    E-Print Network [OSTI]

    Pedro Duarte; Silvius Klein

    2015-07-10

    We derive large deviations type (LDT) estimates for linear cocycles over an ergodic multifrequency torus translation. These models are called quasi-periodic cocycles. We make the following assumptions on the model: the translation vector satisfies a generic Diophantine condition, and the fiber action is given by a matrix valued analytic function of several variables which is not identically singular. The LDT estimates obtained here depend on some uniform measurements on the cocycle. Our general results derived in [9] regarding the continuity properties of the Lyapunov exponents (LE) and of the Oseledets filtration and decompositions are then applicable, and we obtain local weak-Holder continuity of these quantities in the presence of gaps in the Lyapunov spectrum. The main new feature of this work is allowing a cocycle depending on several variables to have singularities, i.e. points of non invertibility. This requires a careful analysis of the set of zeros of certain analytic functions of several variables and of the singularities (i.e. negative infinity values) of pluri-subharmonic functions related to the iterates of the cocycle. A refinement of this method in the one variable case leads to a stronger LDT estimate and in turn to a stronger, nearly-Holder modulus of continuity of the LE, Oseledets filtration and Oseledets decomposition. This is a draft of a chapter in our forthcoming research monograph [9].

  11. THE FREQUENCY OF LOW-MASS EXOPLANETS. II. THE 'PERIOD VALLEY'

    SciTech Connect (OSTI)

    Wittenmyer, Robert A.; Tinney, C. G.; Bailey, J.; O'Toole, Simon J.; Jones, H. R. A.; Butler, R. P.; Carter, B. D.

    2010-10-20

    Radial-velocity planet search campaigns are now beginning to detect low-mass 'Super-Earth' planets, with minimum masses M sin i{approx}< 10 M{sub +}. Using two independently developed methods, we have derived detection limits from nearly four years of the highest-precision data on 24 bright, stable stars from the Anglo-Australian Planet Search. Both methods are more conservative than a human analyzing an individual observed data set, as is demonstrated by the fact that both techniques would detect the radial-velocity signals announced as exoplanets for the 61 Vir system in 50% of trials. There are modest differences between the methods which can be recognized as arising from particular criteria that they adopt. What both processes deliver is a quantitative selection process such that one can use them to draw quantitative conclusions about planetary frequency and orbital parameter distribution from a given data set. Averaging over all 24 stars, in the period range P< 300 days and the eccentricity range 0.0 < e < 0.6, we could detect 99% of planets with velocity amplitudes K{approx}> 7.1 m s{sup -1}. For the best stars in the sample, we are able to detect or exclude planets with K{approx}> 3 m s{sup -1}, corresponding to minimum masses of 8 M{sub +} (P = 5 days) or 17 M{sub +} (P = 50 days). Our results indicate that the observed 'period valley', a lack of giant planets (M > 100 M{sub +}) with periods between 10 and 100 days, is indeed real. However, for planets in the mass range 10-100 M{sub +}, our results suggest that the deficit of such planets may be a result of selection effects.

  12. Nonlinear periodic waves solutions of the nonlinear self-dual network equations

    SciTech Connect (OSTI)

    Laptev, Denis V. Bogdan, Mikhail M.

    2014-04-15

    The new classes of periodic solutions of nonlinear self-dual network equations describing the breather and soliton lattices, expressed in terms of the Jacobi elliptic functions have been obtained. The dependences of the frequencies on energy have been found. Numerical simulations of soliton lattice demonstrate their stability in the ideal lattice and the breather lattice instability in the dissipative lattice. However, the lifetime of such structures in the dissipative lattice can be extended through the application of ac driving terms.

  13. Quantum Energy Expectation in Periodic Time-Dependent hamiltonians via Green Functions

    E-Print Network [OSTI]

    Cesar R. de Oliveira; Mariza S. Simsen

    2009-07-31

    Let $U_F$ be the Floquet operator of a time periodic hamiltonian $H(t)$. For each positive and discrete observable $A$ (which we call a {\\em probe energy}), we derive a formula for the Laplace time average of its expectation value up to time $T$ in terms of its eigenvalues and Green functions at the circle of radius $e^{1/T}$. Some simple applications are provided which support its usefulness.

  14. Summary Comparison of UNM Dental Plan Options Benefit Period July 1, 2015 through June 30, 2016 Benefits administered by Delta Dental of New Mexico

    E-Print Network [OSTI]

    New Mexico, University of

    ) month Benefit Waiting Period on Major Services applies. If employee was previously covered under a UNM) 395-9420. For easy access to the provider directory applicable to each option, log onto Delta

  15. New presulfiding technique proves successful in commercial trials

    SciTech Connect (OSTI)

    Welch, J.G. (CRI International Inc., Houston, TX (United States)); Poyner, P. (Conoco Inc., Ponca City, OK (United States)); Skelly, R.F. (Criterion Catalyst Co., Houston, TX (United States))

    1994-10-10

    An improved ex situ catalyst-presulfiding procedure has proven successful in several commercial trials, including one at Conoco Inc.'s Ponca City, Okla., refinery. The new technique overcomes some of the difficulties experienced with earlier presulfiding technologies. Hydrotreating catalyst presulfided using CRI International Inc.'s new procedure was loaded into Conoco's gas oil desulfurizer in mid-1993. The large exotherm experienced with earlier-generation presulfided catalysts was eliminated with the new procedure. The paper describes the development history, the new process, laboratory methods for measuring catalytic activity, sulfur retention, and plans to expand the process to other catalyst systems.

  16. Consortium to design human trials of mosaic HIV vaccine

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAuditsCluster Compatibilitydefaultin TestingAugustNationalBackCASLHuman trials

  17. PUBLICATIONS FUND GUIDELINES FOR APPLICANTS

    E-Print Network [OSTI]

    Saskatchewan, University of

    , the resulting scholarly and creative work must meet peer standards of excellence and be suitable for publicationPUBLICATIONS FUND GUIDELINES FOR APPLICANTS Deadlines: May 1st & November 1st November 1st 2010 Competition only ­ AVAILABLE FUNDING FOR TWO JOURNALS FOR A FIVE-YEAR PERIOD The Publications Fund is designed

  18. Market Trial: Selling Off-Grid Lighting Products in Rural Kenya

    E-Print Network [OSTI]

    Tracy, Jennifer

    2012-01-01

    trial of off-grid LED lighting products in Maai Mahiu, aa relatively costly LED lighting product. If market spoilageand higher quality LED lighting products. Another potential

  19. Rationale for, and design of, a clinical trial targeting polyamine metabolism for colon cancer chemoprevention.

    E-Print Network [OSTI]

    Gerner, E W; Meyskens, F L Jr; Goldschmid, S; Lance, P; Pelot, D

    2007-01-01

    polyps as- sociated with celecoxib treatment, each studyTrial Inves- tigators (2006) Celecoxib for the prevention ofStudy Investigators (2006) Celecoxib for the prevention of

  20. Classical Propagation of Light in Spatio-Temporal Periodic Media

    E-Print Network [OSTI]

    Alexandrov, B S; Findikoglu, A T; Bishop, A R; Kostadinov, I Z

    2006-01-01

    We analyze the propagation of electromagnetic waves in media where the dielectric constants undergo rapid temporal periodic modulation. Both spatially homogeneous and periodic media are studied. Fast periodic temporal modulation of the dielectric constant of a homogeneous medium leads to existence of photonic band-gap like phenomena. In the presence of both spatial and tem- poral periodicity the electromagnetic spectrum is described in a four-dimensional cube, defining an effective Brillouin zone. In the case of incommensurability between space and time periodicities, completely dispersed point spectra exist.

  1. Laser applications

    SciTech Connect (OSTI)

    Edelson, M.C. )

    1989-11-01

    The breadth of current applications of laser technology is described. It is used as the basis for extrapolating to future application in such activities as AVLIS, SIS, ICP-MS, and RIMs.

  2. Application Programming

    E-Print Network [OSTI]

    Brass, Stefan

    16. Application Programming I (Embedded SQL, ODBC, JDBC) 16­1 Part 16: Application Programming I, ``Embedded SQL'', Chapter 5, ``Oracle JDBC''. . Michael Gertz: Oracle/SQL Tutorial, 1999. [http.5 Developer's Guide. McGraw­Hill, 1999. . SQL Server Books Online, ``Building SQL Server Applications''. . Art

  3. Application Programming

    E-Print Network [OSTI]

    Brass, Stefan

    17. Application Programming I (Embedded SQL, ODBC, JDBC) 17­1 Part 17: Application Programming I, ``Embedded SQL'', Chapter 5, ``Oracle JDBC''. . Michael Gertz: Oracle/SQL Tutorial, 1999. [http.5 Developer's Guide. McGraw­Hill, 1999. . SQL Server Books Online, ``Building SQL Server Applications''. . Art

  4. PROforma guidelines and care pathways: performance in trials and future plans

    E-Print Network [OSTI]

    Black, Elizabeth

    PROforma guidelines and care pathways: performance in trials and future plans John Fox and Vivek of these trials have included quantitative evaluations on a variety of measures of quality and/or effectiveness, for example, the joint report by the UK Commission for Healthcare Improvement and Audit Commission on cancer

  5. Translational Medicine and Clinical Trial E-paper 14 2015 4

    E-Print Network [OSTI]

    Wu, Yih-Min

    Translational Medicine and Clinical Trial E-paper 14 2015 4 NIH 9 4 Joint COS #12; Translational Medicine and Clinical Trial E-paper Page 2 14 2015 4 NTUH International, Taipei, Taiwan Yun Yen, Taipei Medical University, Taipei, Taiwan #12; Translational Medicine

  6. Tables for Trials and Failures with PD for Designated Confidence Level

    SciTech Connect (OSTI)

    Leach, Janice

    2014-02-01

    Two attachments are provided for performance testing of sensors and other Physical Protection System (PPS) components.#2; The first attachment is a table of Trials and Failures, giving Probability of Detection (PD) for a designated confidence level and sorted by trials.#2; The second attachment contains the same data, sorted by failures.

  7. Periodicals collection management using a decision support system

    SciTech Connect (OSTI)

    Compton, M.L.; Moser, E.C.

    1993-12-31

    Sandia National Laboratories is a multiprogram national laboratory established in 1949. The Library currently uses DOBIS for its automated system, including the Periodicals Control function for periodical check-in. DOBIS performs processing and control functions adequately, but could not meet our reporting needs. Therefore the Library`s Periodicals Decision Team decided that they needed another ``system`` for collection management. A Periodicals Decision Support System was created using information downloaded from DOBIS and uploaded into dBASE IV. The Periodical Decision Support System functions as an information-processing system that has aided us in making collection management decisions for periodicals. It certainly allows us to do interactive ad-hoc analysis; although there are no modeling tools currently incorporated in the system. We hope that these modeling tools will come later. We have been gathering information and developing needed reports to achieve this goal.

  8. INTERNAL REPAIR OF PIPELINES REVIEW & EVALUATION OF INTERNAL PIPELINE REPAIR TRIALS REPORT

    SciTech Connect (OSTI)

    Robin Gordon; Bill Bruce; Ian Harris; Dennis Harwig; George Ritter; Bill Mohr; Matt Boring; Nancy Porter; Mike Sullivan; Chris Neary

    2004-09-01

    The two broad categories of fiber-reinforced composite liner repair and deposited weld metal repair technologies were reviewed and evaluated for potential application for internal repair of gas transmission pipelines. Both are used to some extent for other applications and could be further developed for internal, local, structural repair of gas transmission pipelines. Evaluation trials were conducted on pipe sections with simulated corrosion damage repaired with glass fiber-reinforced composite liners, carbon fiber-reinforced composite liners, and weld deposition. Additional un-repaired pipe sections were evaluated in the virgin condition and with simulated damage. Hydrostatic failure pressures for pipe sections repaired with glass fiber-reinforced composite liner were only marginally greater than that of pipe sections without liners, indicating that this type of liner is generally ineffective at restoring the pressure containing capabilities of pipelines. Failure pressure for pipe repaired with carbon fiber-reinforced composite liner was greater than that of the un-repaired pipe section with damage, indicating that this type of liner is effective at restoring the pressure containing capability of pipe. Pipe repaired with weld deposition failed at pressures lower than that of un-repaired pipe in both the virgin and damaged conditions, indicating that this repair technology is less effective at restoring the pressure containing capability of pipe than a carbon fiber-reinforced liner repair. Physical testing indicates that carbon fiber-reinforced liner repair is the most promising technology evaluated to-date. Development of a comprehensive test plan for this process is recommended for use in the next phase of this project.

  9. Department of Energy Announces Plans for Additional Comment Period...

    Office of Environmental Management (EM)

    Department of Energy Announces Plans for Additional Comment Period on National Interest Electric Transmission Corridors Department of Energy Announces Plans for Additional Comment...

  10. Analysis of Periodic GrowthDisturbance Models Timothy C. Reluga

    E-Print Network [OSTI]

    Reluga, Tim

    and may include forest fires, volcanic eruptions, and hurricanes, occur quickly, perhaps over a period succession around disturbances like forest fires. Andrewartha and Birch (1978) proposed that disturbances

  11. EIS-0431: Extension of Public Comment Period | Department of...

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

    Comment Period Hydrogen Energy California's Integrated Gasification Combined Cycle and Carbon Capture and Sequestration Project, CA The U.S. Department of Energy (DOE) published...

  12. Quality of monitoring of stochastic events by periodic and ...

    E-Print Network [OSTI]

    David K. Y. Yau, Nung Kwan Yip, Chris Y. T. Ma, Nageswara S. V. Rao, Mallikarjun Shankar

    2010-08-28

    sensor monitoring a PoI may be periodically turned off to conserve energy, thereby ... In traditional public safety work, policemen or security guards are on.

  13. Quality of Monitoring of Stochastic Events by Periodic & Proportional ...

    E-Print Network [OSTI]

    2008-12-09

    be periodically turned off to conserve energy, thereby .... ing resources to the different parts in proportion ... riodically turn off the sensor to conserve energy, so.

  14. EIS-0431: Extension of public comment period; Notice of public...

    Energy Savers [EERE]

    EIS-0431: Extension of public comment period; Notice of public hearing; Correction Hydrogen Energy California's Integrated Gasification Combined Cycle and Carbon Capture and...

  15. Pulse vaccination in the periodic infection rate SIR epidemic model

    E-Print Network [OSTI]

    Zhen Jin; Mainul Haque; Quanxing Liu

    2006-06-09

    A pulse vaccination SIR model with periodic infection rate $\\beta (t)$ have been proposed and studied. The basic reproductive number $R_0$ is defined. The dynamical behaviors of the model are analyzed with the help of persistence, bifurcation and global stability. It has been shown that the infection-free periodic solution is globally stable provided $R_0 1$. Standard bifurcation theory have been used to show the existence of the positive periodic solution for the case of $R_0 \\to1^+$. Finally, the numerical simulations have been performed to show the uniqueness and the global stability of the positive periodic solution of the system.

  16. CEQ Extends Comment Period on Revised Draft Guidance on Consideration...

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

    on Revised Draft Guidance on Consideration of Greenhouse Gas Emissions and the Effects of Climate Change in NEPA Reviews CEQ Extends Comment Period on Revised Draft Guidance on...

  17. DOE Extends Public Comment Period for Uranium Program Environmental...

    Office of Environmental Management (EM)

    Uranium Program Environmental Impact Statement DOE Extends Public Comment Period for Uranium Program Environmental Impact Statement April 18, 2013 - 1:08pm Addthis Contractor, Bob...

  18. Guidance on the Required Period for Grantees to Obligate Funds...

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

    on the Required Period for Grantees to Obligate Funds and the Procedures for Reporting of Obligated Funds for the Energy Efficiency Conservation Block Grant (EECBG) Program...

  19. Pressure-driven reconnection and quasi periodical oscillations in plasmas

    SciTech Connect (OSTI)

    Paccagnella, R., E-mail: roberto.paccagnella@igi.cnr.it [Consorzio RFX and Istituto Gas Ionizzati del Consiglio Nazionale delle Ricerche (CNR), Padova (Italy)

    2014-03-15

    This paper presents a model for an ohmically heated plasma in which a feedback exists between thermal conduction and transport, on one side, and the magneto-hydro-dynamical stability of the system, on the other side. In presence of a reconnection threshold for the magnetic field, a variety of periodical or quasi periodical oscillations for the physical quantities describing the system are evidenced. The model is employed to interpret the observed quasi periodical oscillations of electron temperature and perturbed magnetic field around the so called “Single Helical” state in the reversed field pinch, but its relevance for other periodical phenomena observed in magnetic confinement systems, especially in tokamaks, is suggested.

  20. Minimizing Racism in Jury Trials: The Voir Dire Conducted by Charles R. Garry in People of California v. Huey P. Newton

    E-Print Network [OSTI]

    Smith, Ralph R.; Watts, T. Larry

    1971-01-01

    531 (1956). 16. Minimizing Racism in Jury Trials, at 68. 17.BOOK REVIEW MINIMIZING RACISM IN JURY TRIALS: The Voir Direat 41-42. 4. Minimizing Racism In Jury TrIals: The Voir Dire

  1. Efficient Evaluation of Doubly Periodic Green Functions in 3D Scattering, Including Wood Anomaly Frequencies

    E-Print Network [OSTI]

    Oscar P. Bruno; Stephen P. Shipman; Catalin Turc; Stephanos Venakides

    2013-07-04

    We present efficient methods for computing wave scattering by diffraction gratings that exhibit two-dimensional periodicity in three dimensional (3D) space. Applications include scattering in acoustics, electromagnetics and elasticity. Our approach uses boundary-integral equations. The quasi-periodic Green function is a doubly infinite sum of scaled 3D free-space outgoing Helmholtz Green functions. Their source points are located at the nodes of a periodicity lattice of the grating. For efficient numerical computation of the lattice sum, we employ a smooth truncation. Super-algebraic convergence to the Green function is achieved as the truncation radius increases, except at frequency-wavenumber pairs at which a Rayleigh wave is at exactly grazing incidence to the grating. At these "Wood frequencies", the term in the Fourier series representation of the Green function that corresponds to the grazing Rayleigh wave acquires an infinite coefficient and the lattice sum blows up. At Wood frequencies, we modify the Green function by adding two types of terms to it. The first type adds weighted spatial shifts of the Green function to itself with singularities below the grating; this yields algebraic convergence. The second-type terms are quasi-periodic plane wave solutions of the Helmholtz equation. They reinstate (with controlled coefficients) the grazing modes, effectively eliminated by the terms of first type. These modes are needed in the Green function for guaranteeing the well-posedness of the boundary-integral equation that yields the scattered field. We apply this approach to acoustic scattering by a doubly periodic 2D grating near and at Wood frequencies and scattering by a doubly periodic array of scatterers away from Wood frequencies.

  2. SU-E-J-189: Credentialing of IGRT Equipment and Processes for Clinical Trials

    SciTech Connect (OSTI)

    Court, L; Aristophanous, M; Followill, D; Kirsner, S; Kisling, K; Pidikiti, R; Wong, P; Balter, P; Bellezza, D; Massingill, B; Papanikolaou, N; Parker, B; Zhen, H

    2014-06-01

    Purpose: Current dosimetry phantoms used for clinical trial credentialing do not directly assess IGRT processes. This work evaluates a custom-built IGRT phantom for credentialing of multiple IGRT modalities and processes. Methods: An IGRT phantom was built out of a low-density body with two inserts. Insert A is used for the CT simulation. Insert B is used for the actual treatment. The inserts contain identical targets in different locations. Relative positions are unknown to the user. The user simulates the phantom (with insert A) as they would a patient, including marking the phantom. A treatment plan is created and sent to the treatment unit. The phantom (with insert B) is then positioned using local IGRT practice. Shifts (planned isocenter, if applicable, and final isocenter) are marked on the phantom using room lasers. The mechanical reproducibility of re-inserting the inserts within the phantom body was tested using repeat high-resolution CT scans. The phantom was tested at 7 centers, selected to include a wide variety of imaging equipment. Results: Mechanical reproducibility was measured as 0.5-0.9mm, depending on the direction. Approaches tested to mark (and transfer) simulation isocenter included lasers, fiducials and reflective markers. IGRT approaches included kV imaging (Varian Trilogy, Brainlab ExacTrac), kV CT (CT-on-rails), kV CBCT (Varian Trilogy, Varian Truebeam, Elekta Agility) and MV CT (Tomotherapy). Users were able to successfully use this phantom for all combinations of equipment and processes. IGRT-based shifts agreed with the truth within 0.8mm, 0.8mm and 1.9mm in the LR, AP, and SI directions, respectively. Conclusion: Based on these preliminary results, the IGRT phantom can be used for credentialing of clinical trials with an action level of 1mm in AP and LR directions, and 2mm in the SI direction, consistent with TG142. We are currently testing with additional institutions with different equipment and processes, including Cyberknife. This project was funded by the Cancer Prevention Research Institute of Texas.

  3. Periodic equivalence ratio modulation method and apparatus for controlling combustion instability

    DOE Patents [OSTI]

    Richards, George A. (Morgantown, WV); Janus, Michael C. (Baltimore, MD); Griffith, Richard A. (Morgantown, WV)

    2000-01-01

    The periodic equivalence ratio modulation (PERM) method and apparatus significantly reduces and/or eliminates unstable conditions within a combustion chamber. The method involves modulating the equivalence ratio for the combustion device, such that the combustion device periodically operates outside of an identified unstable oscillation region. The equivalence ratio is modulated between preselected reference points, according to the shape of the oscillation region and operating parameters of the system. Preferably, the equivalence ratio is modulated from a first stable condition to a second stable condition, and, alternatively, the equivalence ratio is modulated from a stable condition to an unstable condition. The method is further applicable to multi-nozzle combustor designs, whereby individual nozzles are alternately modulated from stable to unstable conditions. Periodic equivalence ratio modulation (PERM) is accomplished by active control involving periodic, low frequency fuel modulation, whereby low frequency fuel pulses are injected into the main fuel delivery. Importantly, the fuel pulses are injected at a rate so as not to affect the desired time-average equivalence ratio for the combustion device.

  4. Periodic equivalence ratio modulation method and apparatus for controlling combustion instability

    SciTech Connect (OSTI)

    Richards, G.A.; Janus, M.C.; Griffith, R.A.

    2000-05-09

    The periodic equivalence ratio modulation (PERM) method and apparatus significantly reduces and/or eliminates unstable conditions within a combustion chamber. The method involves modulating the equivalence ratio for the combustion device, such that the combustion device periodically operates outside of an identified unstable oscillation region. The equivalence ratio is modulated between preselected reference points, according to the shape of the oscillation region and operating parameters of the system. Preferably, the equivalence ratio is modulated from a first stable condition to a second stable condition, and, alternatively, the equivalence ratio is modulated from a stable condition to an unstable condition. The method is further applicable to multi-nozzle combustor designs, whereby individual nozzles are alternately modulated from stable to unstable conditions. Periodic equivalence ratio modulation (PERM) is accomplished by active control involving periodic, low frequency fuel modulation, whereby low frequency fuel pulses are injected into the main fuel delivery. Importantly, the fuel pulses are injected at a rate so as not to affect the desired time-average equivalence ratio for the combustion device.

  5. Controller Synthesis for Periodic, Linear-Distributed Parameter Systems: Channel Flow Application

    E-Print Network [OSTI]

    Kang, SM; Speyer, JL; Kim, J

    2015-01-01

    Flow,” Journal of Fluid Mechanics, Vol. 481, April 2003, pp.Streaks,” Journal of Fluid Mechanics, Vol. 537, Aug. 2005,Flow,” Journal of Fluid Mechanics, Vol. 558, July 2006, pp.

  6. A Novel Low-Loss Slow-Wave CPW Periodic Structure for Filter Applications

    E-Print Network [OSTI]

    Itoh, Tatsuo

    matched. The structure is applied to realize a miniature lowpass filter one-tenth the size of conventional, such as by drilling holes in the substrate or by etching patterns in the microstrip ground plane [8]. Because

  7. Identification of periodic autoregressive moving average models and their application to the modeling

    E-Print Network [OSTI]

    Meerschaert, Mark M.

    the dimensions of hydraulic works, for risk assessment in urban water supply and irrigation, for optimal of hydroelectric systems, for planning capacity expansion of water supply systems, and others [see Salas, 1993]. [3

  8. 2006-01-0181 Periodic Input Observer Design: Application for Imbalance

    E-Print Network [OSTI]

    is a great tool to solve this problem. 1 #12;Crankshaft Cylinders Turbocharger Compressor Exhaust Gas

  9. Realtime controller tuning for periodic disturbance rejection with application to active noise control

    E-Print Network [OSTI]

    Kinney, Charles E.

    2009-01-01

    precisely model the disturbance frequency and therefore manyknowledge of the disturbance frequency. To overcome this,perturbations in the disturbance frequency. Steinbuch [2002

  10. Notice of Extension of Public Comment Period for Application for Proposed

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy AEnergy Managing853926 News en INFOGRAPHIC:Pictured: Torey(EIS)

  11. Fabrication and applications of sub-micron 2D and 3D periodic carbon

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing(Journal Article) |production at a linear(Conference) |SciTechReport)LiquidArticle)

  12. Dual periodicities in the rotational modulation of Saturn narrowband emissions

    E-Print Network [OSTI]

    Gurnett, Donald A.

    Dual periodicities in the rotational modulation of Saturn narrowband emissions S.Y. Ye,1 D. A emissions is examined, restricting the spacecraft location to either the northern or the southern hemisphere of Saturn. It is found that in both hemispheres, the modulation period of 5 kHz narrowband emissions has two

  13. Homogenization of linear spatially periodic electronic Michel Lenczner

    E-Print Network [OSTI]

    Homogenization of linear spatially periodic electronic circuits Michel Lenczner January 20, 2006 Abstract: In this paper we establish a simplified model of general spatially periodic linear electronic is reported. 1 Introduction It is well known that when the size of an analog electronic network increases too

  14. Efficient Mining of Partial Periodic Patterns in Time Series Database

    E-Print Network [OSTI]

    Dong, Guozhu

    Efficient Mining of Partial Periodic Patterns in Time Series Database In ICDE 99 Jiawei Han \\Lambda peri­ odic patterns in time­series databases, is an interesting data mining problem. Previous studies several algorithms for efficient mining of par­ tial periodic patterns, by exploring some interesting

  15. Multivariate periodic wavelet analysis Dirk Langemann, Jurgen Prestin

    E-Print Network [OSTI]

    Prestin, Jürgen

    Multivariate periodic wavelet analysis Dirk Langemann, J¨urgen Prestin University of L¨ubeck, Institute of Mathematics, Wallstr. 40, D-23560 L¨ubeck, Germany Abstract General multivariate periodic are generalized to multivariate shift invariant spaces on non-tensor-product pat- terns. In particular

  16. Saving and Using Encountered Information: Implications for Electronic Periodicals

    E-Print Network [OSTI]

    Marshall, Cathy

    Saving and Using Encountered Information: Implications for Electronic Periodicals Catherine C of a focus on electronic publications, we undertook an exploratory study of how people saved and used study participants had examples of materials they had deliberately saved from periodicals, ranging from

  17. Optical characterization of periodically-poled KTiOPO4

    E-Print Network [OSTI]

    Exter, Martin van

    Optical characterization of periodically-poled KTiOPO4 W. H. Peeters and M. P. van Exter Huygens-conversion(SPDC) give a direct visualization of the poling quality of a periodically-poled crystal. Identical Maker with small and slowly-varying deformations of the poling structure. Our theoretical model, based on a Fourier

  18. Quantum coherent switch utilizing commensurate nanoelectrode and charge density periodicities

    DOE Patents [OSTI]

    Harrison; Neil (Santa Fe, NM), Singleton; John (Los Alamos, NM), Migliori; Albert (Santa Fe, NM)

    2008-08-05

    A quantum coherent switch having a substrate formed from a density wave (DW) material capable of having a periodic electron density modulation or spin density modulation, a dielectric layer formed onto a surface of the substrate that is orthogonal to an intrinsic wave vector of the DW material; and structure for applying an external spatially periodic electrostatic potential over the dielectric layer.

  19. Optimized shooting method for finding periodic orbits of nonlinear dynamical systems

    E-Print Network [OSTI]

    W. Dednam; A. E. Botha

    2014-08-14

    An alternative numerical method is developed to find stable and unstable periodic orbits of nonlinear dynamical systems. The method exploits the high-efficiency of the Levenberg-Marquardt algorithm for medium-sized problems and has the additional advantage of being relatively simple to implement. It is also applicable to both autonomous and non-autonomous systems. As an example of its use, it is employed to find periodic orbits in the R\\"ossler system, a coupled R\\"ossler system, as well as an eight-dimensional model of a flexible rotor-bearing; problems which have been treated previously via two related methods. The results agree with the previous methods and are seen to be more accurate in some cases. A simple implementation of the method, written in the Python programming language, is provided as an Appendix.

  20. Unstable periodic orbits in a chaotic meandering jet flow

    E-Print Network [OSTI]

    Uleysky, M Yu; Prants, S V; 10.1088/1751-8113/41/21/215102

    2012-01-01

    We study the origin and bifurcations of typical classes of unstable periodic orbits in a jet flow that was introduced before as a kinematic model of chaotic advection, transport and mixing of passive scalars in meandering oceanic and atmospheric currents. A method to detect and locate the unstable periodic orbits and classify them by the origin and bifurcations is developed. We consider in detail period-1 and period-4 orbits playing an important role in chaotic advection. We introduce five classes of period-4 orbits: western and eastern ballistic ones, whose origin is associated with ballistic resonances of the fourth order, rotational ones, associated with rotational resonances of the second and fourth orders, and rotational-ballistic ones associated with a rotational-ballistic resonance. It is a new kind of nonlinear resonances that may occur in chaotic flow with jets and/or circulation cells. Varying the perturbation amplitude, we track out the origin and bifurcations of the orbits for each class.

  1. Unstable periodic orbits in a chaotic meandering jet flow

    E-Print Network [OSTI]

    M. Yu. Uleysky; M. V. Budyansky; S. V. Prants

    2007-12-25

    We study the origin and bifurcations of typical classes of unstable periodic orbits in a jet flow that was introduced before as a kinematic model of chaotic advection, transport and mixing of passive scalars in meandering oceanic and atmospheric currents. A method to detect and locate the unstable periodic orbits and classify them by the origin and bifurcations is developed. We consider in detail period-1 and period-4 orbits playing an important role in chaotic advection. We introduce five classes of period-4 orbits: western and eastern ballistic ones, whose origin is associated with ballistic resonances of the fourth order, rotational ones, associated with rotational resonances of the second and fourth orders, and rotational-ballistic ones associated with a rotational-ballistic resonance. It is a new kind of nonlinear resonances that may occur in chaotic flow with jets and/or circulation cells. Varying the perturbation amplitude, we track out the origin and bifurcations of the orbits for each class.

  2. Application Engineering,

    E-Print Network [OSTI]

    Skogestad, Sigurd

    A Plantwide Control Procedure with Application to Control Structure Design for a Gas Power Plant S. Skogestad, M. S. Govatsmark Department of Chemical Engineering, NTNU #12; Outline #15; Gas power plant #15; Plantwide control #15; Plantwide control procedure #15; Application #15; Concluding remarks #12; Gas power

  3. Planar resonant periodic orbits in Kuiper belt dynamics

    E-Print Network [OSTI]

    George Voyatzis; Thomas Kotoulas

    2005-02-28

    In the framework of the planar restricted three body problem we study a considerable number of resonances associated to the Kuiper Belt dynamics and located between 30 and 48 a.u. Our study is based on the computation of resonant periodic orbits and their stability. Stable periodic orbits are surrounded by regular librations in phase space and in such domains the capture of trans-Neptunian object is possible. All the periodic orbits found are symmetric and there is evidence for the existence of asymmetric ones only in few cases. In the present work first, second and third order resonances are under consideration. In the planar circular case we found that most of the periodic orbits are stable. The families of periodic orbits are temporarily interrupted by collisions but they continue up to relatively large values of the Jacobi constant and highly eccentric regular motion exists for all cases. In the elliptic problem and for a particular eccentricity value of the primary bodies the periodic orbits are isolated. The corresponding families, where they belong to, bifurcate from specific periodic orbits of the circular problem and seem to continue up to the rectilinear problem. Both stable and unstable orbits are obtained for each case. In the elliptic problem the unstable orbits found are associated with narrow chaotic domains in phase space. The evolution of the orbits, which are located in such chaotic domains, seems to be practically regular and bounded for long time intervals.

  4. Enhanced entrainability of genetic oscillators by period mismatch

    E-Print Network [OSTI]

    Yoshihiko Hasegawa; Masanori Arita

    2013-01-12

    Biological oscillators coordinate individual cellular components so that they function coherently and collectively. They are typically composed of multiple feedback loops, and period mismatch is unavoidable in biological implementations. We investigated the advantageous effect of this period mismatch in terms of a synchronization response to external stimuli. Specifically, we considered two fundamental models of genetic circuits: smooth- and relaxation oscillators. Using phase reduction and Floquet multipliers, we numerically analyzed their entrainability under different coupling strengths and period ratios. We found that a period mismatch induces better entrainment in both types of oscillator; the enhancement occurs in the vicinity of the bifurcation on their limit cycles. In the smooth oscillator, the optimal period ratio for the enhancement coincides with the experimentally observed ratio, which suggests biological exploitation of the period mismatch. Although the origin of multiple feedback loops is often explained as a passive mechanism to ensure robustness against perturbation, we study the active benefits of the period mismatch, which include increasing the efficiency of the genetic oscillators. Our findings show a qualitatively different perspective for both the inherent advantages of multiple loops and their essentiality.

  5. HTGR Generic Technology Program. Semiannual report for the period ending September 30, 1980

    SciTech Connect (OSTI)

    Not Available

    1980-11-01

    This document reports the technical accomplishments on the HTGR Generic Technology Program at General Atomic during the second half of FY-80. It covers a period when the design direction of the National HTGR Program is in the process of an overall review. The HTGR Generic Technology Program activities have continued so as to provide the basic technology required for all HTGR applications. The activities include the need to develop an LEU fuel and the need to qualify materials and components for the higher temperatures of the gas turbines and process heat plants.

  6. Long period grating refractive-index sensor: optimal design for single wavelength interrogation

    SciTech Connect (OSTI)

    Kapoor, Amita; Sharma, Enakshi K.

    2009-11-01

    We report the design criteria for the use of long period gratings (LPGs) as refractive-index sensors with output power at a single interrogating wavelength as the measurement parameter. The design gives maximum sensitivity in a given refractive-index range when the interrogating wavelength is fixed. Use of the design criteria is illustrated by the design of refractive-index sensors for specific application to refractive-index variation of a sugar solution with a concentration and detection of mole fraction of xylene in heptane (paraffin).

  7. Logistic Models with Time-Dependent Coefficients and Some of Their Applications

    E-Print Network [OSTI]

    Raquel M. Lopez; Benjamin R. Morin; Sergei K. Suslov

    2010-08-15

    We discuss explicit solutions of the logistic model with variable parameters. Classical data on the sunflower seeds growth are revisited as a simple application of the logistic model with periodic coefficients. Some applications to related biological systems are briefly reviewed.

  8. Development of Seismic Isolation Systems Using Periodic Materials

    SciTech Connect (OSTI)

    Yan, Yiqun; Mo, Yi-Lung; Menq, Farn-Yuh; Stokoe, II, Kenneth H.; Perkins, Judy; Tang, Yu

    2014-12-10

    Advanced fast nuclear power plants and small modular fast reactors are composed of thin-walled structures such as pipes; as a result, they do not have sufficient inherent strength to resist seismic loads. Seismic isolation, therefore, is an effective solution for mitigating earthquake hazards for these types of structures. Base isolation, on which numerous studies have been conducted, is a well-defined structure protection system against earthquakes. In conventional isolators, such as high-damping rubber bearings, lead-rubber bearings, and friction pendulum bearings, large relative displacements occur between upper structures and foundations. Only isolation in a horizontal direction is provided; these features are not desirable for the piping systems. The concept of periodic materials, based on the theory of solid-state physics, can be applied to earthquake engineering. The periodic material is a material that possesses distinct characteristics that prevent waves with certain frequencies from being transmitted through it; therefore, this material can be used in structural foundations to block unwanted seismic waves with certain frequencies. The frequency band of periodic material that can filter out waves is called the band gap, and the structural foundation made of periodic material is referred to as the periodic foundation. The design of a nuclear power plant, therefore, can be unified around the desirable feature of a periodic foundation, while the continuous maintenance of the structure is not needed. In this research project, three different types of periodic foundations were studied: one-dimensional, two-dimensional, and three-dimensional. The basic theories of periodic foundations are introduced first to find the band gaps; then the finite element methods are used, to perform parametric analysis, and obtain attenuation zones; finally, experimental programs are conducted, and the test data are analyzed to verify the theory. This procedure shows that the periodic foundation is a promising and effective way to mitigate structural damage caused by earthquake excitation.

  9. Evolution of the periodicities in 2S 0114+650

    E-Print Network [OSTI]

    Ravi Sood; Sean Farrell; Paul O'Neill; Ravi Manchanda; N. M. Ashok

    2006-03-01

    We have analysed nine years of data from the All Sky Monitor on the Rossi X-ray Timing Explorer for 2S 0114+650 to study the evolution of its spin, binary and super-orbital periods. The spin history of the neutron star in this system exhibits torque reversals lasting ~1 yr. The newly discovered super-orbital period has remained stable over the 9-yr span, making 2S 0114+650 the fourth known system to exhibit stable super-orbital modulation. We compare its super-orbital period evolution with those of the other three such systems.

  10. PERIODIC STRUCTURE IN THE MEGAPARSEC-SCALE JET OF PKS 0637-752

    SciTech Connect (OSTI)

    Godfrey, L. E. H.; Ekers, R.; Lovell, J. E. J.; Burke-Spolaor, S.; Bicknell, G. V.; Jauncey, D. L.; Birkinshaw, M.; Worrall, D. M.; Schwartz, D. A.; Marshall, H. L.; Gelbord, J.; Perlman, E. S.; Georganopoulos, M.

    2012-10-20

    We present 18 GHz Australia Telescope Compact Array imaging of the megaparsec-scale quasar jet PKS 0637-752 with angular resolution {approx}0.''58. We draw attention to a spectacular train of quasi-periodic knots along the inner 11'' of the jet, with average separation {approx}1.1 arcsec (7.6 kpc projected). We consider two classes of model to explain the periodic knots: those that involve a static pattern through which the jet plasma travels (e.g., stationary shocks) and those that involve modulation of the jet engine. Interpreting the knots as re-confinement shocks implies the jet kinetic power Q{sub jet} {approx} 10{sup 46} erg s{sup -1}, but the constant knot separation along the jet is not expected in a realistic external density profile. For models involving modulation of the jet engine, we find that the required modulation period is 2 Multiplication-Sign 10{sup 3} yr < {tau} < 3 Multiplication-Sign 10{sup 5} yr. The lower end of this range is applicable if the jet remains highly relativistic on kiloparsec scales, as implied by the IC/CMB model of jet X-ray emission. We suggest that the periodic jet structure in PKS 0637-752 may be analogous to the quasi-periodic jet modulation seen in the microquasar GRS 1915+105, believed to result from limit cycle behavior in an unstable accretion disk. If variations in the accretion rate are driven by a binary black hole, the predicted orbital radius is 0.7 pc {approx}< a {approx}< 30 pc, which corresponds to a maximum angular separation of {approx}0.1-5 mas.

  11. Optimization of a Goal Maintenance Task for Use in Clinical Applications Dori Henderson1

    E-Print Network [OSTI]

    Optimization of a Goal Maintenance Task for Use in Clinical Applications Dori Henderson1 , Andrew B Expec- tancy task (DPX) to assess goal maintenance for use in clinical trials. Altering the standard mixed-effects logistic regression within a hierarchical linear model. Results: We analyzed the data from

  12. Fourier Analysis and Autocorrelation Function Applied to Periodical Nanostructures

    E-Print Network [OSTI]

    Rockett, Angus

    Fourier Analysis and Autocorrelation Function Applied to Periodical Nanostructures E. Cruz Microscopy (AFM) Image Fast Fourier Transformation Autocorrelation Function(AC) Angular Distribution] Fourier Analysis: analytical and geometrical aspects, Bray William O ed. New York: Marcel Dekker, 1994

  13. Period tripling accumulation point for complexified Henon map

    E-Print Network [OSTI]

    O. B. Isaeva; S. P. Kuznetsov

    2005-09-06

    Accumulation point of period-tripling bifurcations for complexified Henon map is found. Universal scaling properties of parameter space and Fourier spectrum intrinsic to this critical point is demonstrated.

  14. Single-valued periods and multiple zeta values

    E-Print Network [OSTI]

    Francis Brown

    2013-09-20

    The values at 1 of single-valued multiple polylogarithms span a certain subalgebra of multiple zeta values. In this paper, the properties of this algebra are studied from the point of view of motivic periods.

  15. Competitive Multi-period Pricing with Fixed Inventories

    E-Print Network [OSTI]

    Perakis, Georgia

    This paper studies the problem of multi-period pricing for perishable products in a competitive (oligopolistic) market. We study non cooperative Nash equilibrium policies for sellers. At the beginning of the time horizon, ...

  16. Neutron-Scattering Evidence for a Periodically Modulated Superconducti...

    Office of Scientific and Technical Information (OSTI)

    Neutron-Scattering Evidence for a Periodically Modulated Superconducting Phase in the Underdoped Cuprate La1.905Ba0.095CuO4 Citation Details In-Document Search Title:...

  17. Dispersion extraction with near-field measurements in periodic waveguides

    E-Print Network [OSTI]

    , R. D. Meade, and J. N. Winn, Photonic Crystals: Molding the Flow of Light (Princeton University. Joannopoulos, "Guided and defect modes in periodic dielectric wave-guides," J. Opt. Soc. Am. B 12, 1267

  18. Real-time Multi-period truckload routing problems

    E-Print Network [OSTI]

    Limpaitoon, Tanachai

    2008-01-01

    In this thesis we consider a multi-period truckload pick-up and delivery problem dealing with real-time requests over a finite time horizon. We introduce the notion of postponement of requests, whereby the company can ...

  19. No more periods? Oral contraception and menstrual suppression 

    E-Print Network [OSTI]

    Gunson, Dr Jessie

    Oral contraception, or ‘The Pill’, is widely used by women to control how often they have a period. In many countries using oral contraception in this way has remained unofficial practice. However, in 2003 the first FDA ...

  20. Asking for Performance: Exploiting Developer Intuition to Guide Instrumentation with TimeTrial

    E-Print Network [OSTI]

    Chamberlain, Roger

    Asking for Performance: Exploiting Developer Intuition to Guide Instrumentation with Time Instrumentation with TimeTrial," in Proc. of 13th International Conference on High Performance Computing #12;Asking for Performance: Exploiting Developer Intuition to Guide Instrumentation with Time

  1. Autonomous Golf Cars for Public Trial of Mobility-on-Demand Service

    E-Print Network [OSTI]

    Frazzoli, Emilio

    We detail the design of autonomous golf cars which were used in public trials in Singapore’s Chinese and Japanese Gardens, for the purpose of raising public awareness and gaining user acceptance of autonomous vehicles. The ...

  2. Adolescent type 1 Diabetes cardio-renal Intervention Trial (AdDIT)

    E-Print Network [OSTI]

    Adolescent type 1 Diabetes cardio-renal Intervention Trial Research Group

    2009-12-17

    of angiotensin converting enzyme inhibitors (ACEI) and Statins is increasing, and in order to determine whether these agents are of value in the adolescent population a large randomized controlled clinical trial is needed. Methods/Design The Adolescent type 1...

  3. ExaCT: automatic extraction of clinical trial characteristics from journal publications

    E-Print Network [OSTI]

    Kiritchenko, Svetlana; de Bruijn, Berry; Carini, Simona; Martin, Joel; Sim, Ida

    2010-01-01

    from clinical trial publications. Proceedings of the AMIAInformatics Association 2009, 81-85. Pre-publication historyThe pre-publication history for this paper can be accessed

  4. Reporting quality of randomized trials in the diet and exercise literature for weight loss

    E-Print Network [OSTI]

    Gibson, Cheryl A.; Kirk, Erik P.; LeCheminant, James D.; Bailey, Bruce W.; Huang, Guoyuan; Donnelly, Joseph E.

    2005-02-23

    Background: To adequately assess individual studies and synthesize quantitative research on weight loss studies, transparent reporting of data is required. The authors examined the reporting quality of randomized trials ...

  5. Word Generation Randomized Trial: Discussion Mediates the Impact of Program Treatment on Academic Word Learning

    E-Print Network [OSTI]

    Lawrence, J. F; Crosson, A. C; Pare-Blagoev, E. J; Snow, C. E

    2015-01-01

    36(2), 249–277. Word Generation Randomized Trial Larson, B.assessment of the Word Generation vocabulary intervention.follow-up of the Word Generation program. Bilingualism:

  6. Market Trial: Selling Off-Grid Lighting Products in Rural Kenya

    E-Print Network [OSTI]

    Tracy, Jennifer

    2012-01-01

    A. Jacobson (2007) “The Off-Grid Lighting Market in WesternBudget: The Economics of Off-Grid Lighting for Small6 Market Trial: Selling Off-Grid Lighting Products in Rural

  7. Title: Imputation techniques for incomplete radiographic outcome in rheumatoid arthritis randomized trials: a simulation study

    E-Print Network [OSTI]

    Samson, Adeline

    , INSERM U738, Groupe Hospitalier Bichat-Claude Bernard, 46 rue Henri Huchard, 75018 Paris, France. Tel for the management of RA in controlled trials (4, 5) and the radiographic outcome is often used as a primary endpoint

  8. Full Scale Field Trial of the Low Temperature Mercury Capture Process

    SciTech Connect (OSTI)

    James Locke; Richard Winschel

    2011-09-30

    CONSOL Energy Inc., with partial funding from the Department of Energy (DOE) National Energy Technology Laboratory, designed a full-scale installation for a field trial of the Low-Temperature Mercury Control (LTMC) process, which has the ability to reduce mercury emissions from coal-fired power plants by over 90 percent, by cooling flue gas temperatures to approximately 230 °F and absorbing the mercury on the native carbon in the fly ash, as was recently demonstrated by CONSOL R&D on a slip-stream pilot plant at the Allegheny Energy Mitchell Station with partial support by DOE. LTMC has the potential to remove over 90 percent of the flue gas mercury at a cost at least an order of magnitude lower (on a $/lb mercury removed basis) than activated carbon injection. The technology is suitable for retrofitting to existing and new plants, and, although it is best suited to bituminous coal-fired plants, it may have some applicability to the full range of coal types. Installation plans were altered and moved from the original project host site, PPL Martins Creek plant, to a second host site at Allegheny Energyâ??s R. Paul Smith plant, before installation actually occurred at the Jamestown (New York) Board of Public Utilities (BPU) Samuel A. Carlson (Carlson) Municipal Generating Station Unit 12, where the LTMC system was operated on a limited basis. At Carlson, over 60% mercury removal was demonstrated by cooling the flue gas to 220-230 °F at the ESP inlet via humidification. The host unit ESP operation was unaffected by the humidification and performed satisfactorily at low temperature conditions.

  9. Transport and Fractionation in Periodic Potential-Energy Landscapes

    E-Print Network [OSTI]

    Kosta Ladavac; Matthew Pelton; David G. Grier

    2004-04-09

    Objects driven through periodically modulated potential-energy landscapes in two dimensions can become locked in to symmetry-selected directions that are independent of the driving force's orientation. We investigate this problem in the overdamped limit, and demonstrate that the crossover from free-flowing to locked-in transport can depend exponentially on an object's size, with this exceptional selectivity emerging from the periodicity of the environment.

  10. Modal Approach to Casimir Forces in Periodic Structures

    E-Print Network [OSTI]

    P. S. Davids; F. Intravaia; F. S. S. Rosa; D. A. R. Dalvit

    2010-08-20

    We present a modal approach to calculate finite temperature Casimir interactions between two periodically modulated surfaces. The scattering formula is used and the reflection matrices of the patterned surfaces are calculated decomposing the electromagnetic field into the natural modes of the structures. The Casimir force gradient from a deeply etched silicon grating is evaluated using the modal approach and compared to experiment for validation. The Casimir force from a two dimensional periodic structure is computed and deviations from the proximity force approximation examined.

  11. Experimental continuation of periodic orbits through a fold

    E-Print Network [OSTI]

    J. Sieber; A. Gonzalez-Buelga; S. A. Neild; D. J. Wagg; B. Krauskopf

    2008-06-12

    We present a continuation method that enables one to track or continue branches of periodic orbits directly in an experiment when a parameter is changed. A control-based setup in combination with Newton iterations ensures that the periodic orbit can be continued even when it is unstable. This is demonstrated with the continuation of initially stable rotations of a vertically forced pendulum experiment through a fold bifurcation to find the unstable part of the branch.

  12. An Autonomous Adaptive Scheduling Agent for Period Searching

    E-Print Network [OSTI]

    Eric S. Saunders; Tim Naylor; Alasdair Allan

    2008-01-24

    We describe the design and implementation of an autonomous adaptive software agent that addresses the practical problem of observing undersampled, periodic, time-varying phenomena using a network of HTN-compliant robotic telescopes. The algorithm governing the behaviour of the agent uses an optimal geometric sampling technique to cover the period range of interest, but additionally implements proactive behaviour that maximises the optimality of the dataset in the face of an uncertain and changing operating environment.

  13. Long period fiber gratings induced by mechanical resonance

    E-Print Network [OSTI]

    Shahal, Shir; Duadi, Hamootal; Fridman, Moti

    2015-01-01

    We present a simple, and robust method for writing long period fiber gratings with low polarization dependent losses. Our method is based on utilizing mechanical vibrations of the tapered fiber while pooling it. Our method enables real-time tunability of the periodicity, efficiency and length of the grating. We also demonstrate complex grating by writing multiple gratings simultaneously. Finally, we utilized the formation of the gratings in different fiber diameters to investigate the Young's modulus of the fiber.

  14. The BRACELET study: surveys of mortality in UK neonatal and paediatric intensive care trials

    E-Print Network [OSTI]

    Snowdon, Claire; Harvey, Sheila E.; Brocklehurst, Peter; Tasker, Robert C.; Ward Platt, Martin P.; Allen, Elizabeth; Elbourne, Diana

    2010-05-26

    to maximise responses [11]. We are confident that all units were iden- tified, and the comprehensive process of searching rele- vant research databases and websites as well as surveying these units is likely to have identified most of the trials recruiting... evidence which draws upon views of all rele- vant parties with their potentially different perspectives and insights. Clinical teams often recruit to a number of trials concurrently and see bereaved parents in a variety of circumstances; they may be best...

  15. A review of "Treason: Famous English Treason Trials." by Alan Wharam 

    E-Print Network [OSTI]

    Ellen J. Jenkins

    2006-01-01

    -CENTURY NEWS Alan Wharam. Treason: Famous English Treason Trials. Thrupp, Stroud, Gloucestershire, UK: Sutton Publishing Limited, 2005. xviii + 263 pp. + 47 illus. paper ?8.99. Review by ELLEN J. JENKINS, ARKANSAS TECH UNIVERSITY. Alan Wharam?s books... refuge in his own house, where he was captured. His treason trial began on February 19 in Westminster Hall, under the prosecution of Sir Edward Coke, Attorney-General. REVIEWS 113 Interestingly, as Wharam points out, most evidence was presented...

  16. Review of the findings of the Ignik Sikumi CO2-CH4 gas hydrate exchange field trial

    SciTech Connect (OSTI)

    Anderson, Brian J.; Boswell, Ray; Collett, Tim S.; Farrell, Helen; Ohtsuka, Satoshi; White, Mark D.

    2014-08-01

    The Ignik Sikumi Gas Hydrate Exchange Field Trial was conducted by ConocoPhillips in partnership with the U.S. Department of Energy, the Japan Oil, Gas, and Metals National Corporation, and the U.S. Geological Survey within the Prudhoe Bay Unit on the Alaska North Slope (ANS) during 2011 and 2012. The 2011 field program included drilling the vertical test well and performing extensive wireline logging through a thick section of gas-hydrate-bearing sand reservoirs that provided substantial new insight into the nature of ANS gas hydrate occurrences. The 2012 field program involved an extended, scientific field trial conducted within a single vertical well (“huff-and-puff” design) through three primary operational phases: 1) injection of a gaseous phase mixture of CO2, N2, and chemical tracers; 2) flowback conducted at down-hole pressures above the stability threshold for native CH4-hydrate, and 3) extended (30-days) flowback at pressures below the stability threshold of native CH4-hydrate. Ignik Sikumi represents the first field investigation of gas hydrate response to chemical injection, and the longest-duration field reservoir response experiment yet conducted. Full descriptions of the operations and data collected have been fully reported by ConocoPhillips and are available to the science community. The 2011 field program indicated the presence of free water within the gas hydrate reservoir, a finding with significant implications to the design of the exchange trial – most notably the use of a mixed gas injectant. While this decision resulted in a complex chemical environment within the reservoir that greatly tests current experimental and modeling capabilities – without such a mixture, it is apparent that injection could not have been achieved. While interpretation of the field data are continuing, the primary scientific findings and implications of the program are: 1) gas hydrate destabilizing is self-limiting, dispelling any notion of the potential for uncontrolled destabilization; 2) wells must be carefully designed to enable rapid remediation of well-bore blockages that will occur during any cessation in operations; 3) appropriate gas mixes can be successfully injected into hydrate-bearing reservoirs; 4) sand production can be well-managed through standard engineering controls; 5) reservoir heat exchange during depressurization was much more favorable than expected – mitigating concerns for near-well-bore freezing and enabling consideration of more aggressive pressure reduction and; 6) CO2-CH4 exchange can be accomplished in natural reservoirs. The next steps in evaluation of exchange technology should feature multiple well applications; however such field programs will require extensive preparatory experimental and numerical modeling studies and will likely be a secondary priority to further field testing of production through depressurization.

  17. Edge effects in propagation of terahertz radiation in subwavelength periodic structures

    SciTech Connect (OSTI)

    Gelmont, B. Parthasarathy, R.; Globus, T.

    2008-08-15

    Improving detection sensitivity of biological molecules with low absorption characteristics in the terahertz gap still remains an important issue in terahertz vibrational resonance spectroscopy. One possible way to increase coupling of incident terahertz radiation to molecules is to exploit local enhancement of electromagnetic field in periodic slot arrays. In this work, we show that periodic arrays of rectangular slots with subwavelength widths provide for local electromagnetic field enhancements due to edge effects in our low frequency range of interest, 10-25 cm{sup -1}. Periodic structures of Au doped Si and InSb were studied. The half power enhancement width is {approx}500 nm or less around the slot, edges in all cases, thereby possibly bringing terahertz sensing to the nanoscale. InSb is confirmed to offer the highest results with local power enhancements on the order of 1100 at frequency 14 cm{sup -1}. InSb and Si have large skin depths in our frequency range of interest and so the analysis of their structures was done through the Fourier expansion method of field diffracted from gratings. Surface impedance boundary conditions were employed to model the Au structure. The applications possibly include development of novel biosensors, and monitoring biophysical processes such as DNA denaturation.

  18. Extension of Comment Period on Improving Performance of Federal...

    Energy Savers [EERE]

    and Review of Infrastructure Projects More Documents & Publications Application to Export Electric Energy OE Docket No. EA-353 Boralex Fort Fairfield LP & Boralex Ashland...

  19. Time-periodic solutions of the Benjamin-Ono equation

    E-Print Network [OSTI]

    Ambrose, D.M.

    2009-01-01

    application to Benjamin Ono equation. Chinese Physics, 14(solutions of Hamiltonian equations. In Dynamics and Pro-quelques generalisations de l’equation de Korteweg-deVries.

  20. Time-periodic solutions of the Benjamin-Ono equation

    SciTech Connect (OSTI)

    Ambrose , D.M.; Wilkening, Jon

    2008-04-01

    We present a spectrally accurate numerical method for finding non-trivial time-periodic solutions of non-linear partial differential equations. The method is based on minimizing a functional (of the initial condition and the period) that is positive unless the solution is periodic, in which case it is zero. We solve an adjoint PDE to compute the gradient of this functional with respect to the initial condition. We include additional terms in the functional to specify the free parameters, which, in the case of the Benjamin-Ono equation, are the mean, a spatial phase, a temporal phase and the real part of one of the Fourier modes at t = 0. We use our method to study global paths of non-trivial time-periodic solutions connecting stationary and traveling waves of the Benjamin-Ono equation. As a starting guess for each path, we compute periodic solutions of the linearized problem by solving an infinite dimensional eigenvalue problem in closed form. We then use our numerical method to continue these solutions beyond the realm of linear theory until another traveling wave is reached (or until the solution blows up). By experimentation with data fitting, we identify the analytical form of the solutions on the path connecting the one-hump stationary solution to the two-hump traveling wave. We then derive exact formulas for these solutions by explicitly solving the system of ODE's governing the evolution of solitons using the ansatz suggested by the numerical simulations.

  1. 3D-PSTD for modelling second harmonic generation in periodically poled lithium niobate ridge-type waveguides

    E-Print Network [OSTI]

    Devaux, Fabrice

    2015-01-01

    We report an application of the tri-dimensional pseudo-spectral time domain algorithm, that solves with accuracy the nonlinear Maxwell's equations, to predict second harmonic generation in lithium niobate ridge-type waveguides with high index contrast. Characteristics of the nonlinear process such as conversion efficiency as well as impact of the multimode character of the waveguide are investigated as a function of the waveguide geometry in uniformly and periodically poled medium.

  2. 1D periodic potentials with gaps vanishing at k=0

    E-Print Network [OSTI]

    O. Zagordi; A. Michelangeli

    2008-10-13

    Appearance of energy bands and gaps in the dispersion relations of a periodic potential is a standard feature of Quantum Mechanics. We investigate the class of one-dimensional periodic potentials for which all gaps vanish at the center of the Brillouin zone. We characterize them through a necessary and sufficient condition. Potentials of the form we focus on arise in different fields of Physics, from supersymmetric Quantum Mechanics, to Korteweg-de Vries equation theory and classical diffusion problems. The O.D.E. counterpart to this problem is the characterisation of periodic potentials for which coexistence occur of linearly independent solutions of the corresponding Schroedinger equation (Hill's equation). This result is placed in perspective of the previous related results available in the literature.

  3. National Weatherization Assistance Program Characterization Describing the Recovery Act Period

    SciTech Connect (OSTI)

    Tonn, Bruce Edward; Rose, Erin M.; Hawkins, Beth A.

    2015-10-01

    This report characterizes the U.S. Department of Energy s Weatherization Assistance Program (WAP) during the American Recovery and Reinvestment Act of 2009 (Recovery Act) period. This research was one component of the Recovery Act evaluation of WAP. The report presents the results of surveys administered to Grantees (i.e., state weatherization offices) and Subgrantees (i.e., local weatherization agencies). The report also documents the ramp up and ramp down of weatherization production and direct employment during the Recovery Act period and other challenges faced by the Grantees and Subgrantees during this period. Program operations during the Recovery Act (Program Year 2010) are compared to operations during the year previous to the Recovery Act (Program Year 2008).

  4. Lyapunov functions for periodic matrix-valued Jacobi operators

    E-Print Network [OSTI]

    Evgeny Korotyaev; Anton Kutsenko

    2007-01-16

    We consider periodic matrix-valued Jacobi operators. The spectrum of this operator is absolutely continuous and consists of intervals separated by gaps. We define the Lyapunov function, which is analytic on an associated Riemann surface. On each sheet the Lyapunov function has the standard properties of the Lyapunov function for the scalar case. We show that this function has (real or complex) branch points, which we call resonances. We prove that there exist two types of gaps: i) stable gaps, i.e., the endpoints are periodic and anti-periodic eigenvalues, ii) unstable (resonance) gaps, i.e., the endpoints are resonances (real branch points). We show that some spectral data determine the spectrum (counting multiplicity) of the Jacobi operator.

  5. Periodic Discrete Energy for Long-Range Potentials

    E-Print Network [OSTI]

    D. P. Hardin; E. B. Saff; Brian Simanek

    2014-12-11

    We consider periodic energy problems in Euclidean space with a special emphasis on long-range potentials that cannot be defined through the usual infinite sum. One of our main results builds on more recent developments of Ewald summation to define the periodic energy corresponding to a large class of long-range potentials. Two particularly interesting examples are the logarithmic potential and the Riesz potential when the Riesz parameter is smaller than the dimension of the space. For these examples, we use analytic continuation methods to provide concise formulas for the periodic kernel in terms of the Epstein Hurwitz Zeta function. We apply our energy definition to deduce several properties of the minimal energy including the asymptotic order of growth and the distribution of points in energy minimizing configurations as the number of points becomes large. We conclude with some detailed calculations in the case of one dimension, which shows the utility of this approach.

  6. Point Vortices: Finding Periodic Orbits and their Topological Classification

    E-Print Network [OSTI]

    Spencer A. Smith

    2015-10-22

    The motion of point vortices constitutes an especially simple class of solutions to Euler's equation for two dimensional, inviscid, incompressible, and irrotational fluids. In addition to their intrinsic mathematical importance, these solutions are also physically relevant. Rotating superfluid helium can support rectilinear quantized line vortices, which in certain regimes are accurately modeled by point vortices. Depending on the number of vortices, it is possible to have either regular integrable motion or chaotic motion. Thus, the point vortex model is one of the simplest and most tractable fluid models which exhibits some of the attributes of weak turbulence. The primary aim of this work is to find and classify periodic orbits, a special class of solutions to the point vortex problem. To achieve this goal, we introduce a number of algorithms: Lie transforms which ensure that the equations of motion are accurately solved; constrained optimization which reduces close return orbits to true periodic orbits; object-oriented representations of the braid group which allow for the topological comparison of periodic orbits. By applying these ideas, we accumulate a large data set of periodic orbits and their associated attributes. To render this set tractable, we introduce a topological classification scheme based on a natural decomposition of mapping classes. Finally, we consider some of the intriguing patterns which emerge in the distribution of periodic orbits in phase space. Perhaps the most enduring theme which arises from this investigation is the interplay between topology and geometry. The topological properties of a periodic orbit will often force it to have certain geometric properties.

  7. Periodic homogenization and material symmetry in linear elasticity

    E-Print Network [OSTI]

    Mariya Ptashnyk; Brian Seguin

    2015-05-07

    Here homogenization theory is used to establish a connection between the symmetries of a periodic elastic structure associated with the microscopic properties of an elastic material and the material symmetries of the effective, macroscopic elasticity tensor. Previous results of this type exist but here more general symmetries on the microscale are considered. Using an explicit example, we show that it is possible for a material to be fully anisotropic on the microscale and yet have a nontrivial material symmetry group on the macroscale. Another example demonstrates that not all material symmetries of the macroscopic elastic tensor are generated by symmetries of the periodic elastic structure.

  8. Self-organized periodicity of protein clusters in growing bacteria

    E-Print Network [OSTI]

    Hui Wang; Ned S. Wingreen; Ranjan Mukhopadhyay

    2008-08-06

    Chemotaxis receptors in E. coli form clusters at the cell poles and also laterally along the cell body, and this clustering plays an important role in signal transduction. Recently, experiments using flourrescence imaging have shown that, during cell growth, lateral clusters form at positions approximately periodically spaced along the cell body. In this paper, we demonstrate within a lattice model that such spatial organization could arise spontaneously from a stochastic nucleation mechanism. The same mechanism may explain the recent observation of periodic aggregates of misfolded proteins in E. coli.

  9. Periodic Photometric Variability in the Becklin-Neugebauer Object

    E-Print Network [OSTI]

    Lynne A. Hillenbrand; John M. Carpenter; M. F. Skrutskie

    2000-10-24

    The Becklin-Neugebauer (BN) object in the Orion Nebula Cluster (ONC) is a well-studied optically invisible, infrared-bright young stellar object, thought to be an intermediate-mass protostar. We report here that BN exhibited nearly-sinusoidal periodic variability at the near-infrared H- and Ks-bands during a one month observing campaign in 2000 March/April. The period was 8.28 days and the peak-to-peak amplitude ~0.2 mag. Plausible mechanisms for producing the observed variability characteristics are explored.

  10. Period doubling, information entropy, and estimates for Feigenbaum's constants

    E-Print Network [OSTI]

    Reginald D. Smith

    2013-08-03

    The relationship between period doubling bifurcations and Feigenbaum's constants has been studied for nearly 40 years and this relationship has helped uncover many fundamental aspects of universal scaling across multiple nonlinear dynamical systems. This paper will combine information entropy with symbolic dynamics to demonstrate how period doubling can be defined using these tools alone. In addition, the technique allows us to uncover some unexpected, simple estimates for Feigenbaum's constants which relate them to log 2 and the golden ratio, phi, as well as to each other.

  11. Application Acceleration

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L O O D SFederal FacilityApplicant I nstructionsApplication

  12. Sugarcane Trials in the Lower Rio Grande Valley of Texas. 

    E-Print Network [OSTI]

    Cowley, W. R.; Smith, B. A.

    1969-01-01

    reports also that 1967 was a favorable production season in which Louisi- ana growers produced the second largest crop of record. Three varieties, N.Co. 310, C.P. 36-105 and C.P. 44-101, grown in both test periods in Texas, produced higher yields...,aboratory-mill juice Yield of sugar of cane anal yses per per Varietics per acrc Rrix Sucrose Purity to11 acre r,. *122.71 Co. 285 Co. 312 C.P. 36-105 c.r. 48-103 C.P. 44-101 N.Co. 293 N.Co. 310 toil degrccs percent pcrcen t 58.0 17.4 14.9 85...

  13. Proton aurora related to intervals of pulsations of diminishing periods

    E-Print Network [OSTI]

    California at Berkeley, University of

    Proton aurora related to intervals of pulsations of diminishing periods A. G. Yahnin,1 T. A are generated because of a cyclotron instability of the anisotropic distribution of ring current ions. Proton precipitation produced by the cyclotron instability can be responsible for proton aurora. Indeed

  14. Quasi-bound states in periodically driven scattering

    E-Print Network [OSTI]

    H. Landa

    2015-06-29

    We present an approach for obtaining eigenfunctions of periodically driven time-dependent Hamiltonians. Assuming an approximate scale separation between two spatial regions where different potentials dominate, we derive an explicit expansion for scattering problems with mixed cylindrical and spherical symmetry, by matching wavefunctions of a periodic linear drive in the exterior region to solutions of an arbitrary interior potential expanded in spherical waves. Using this method we study quasi-bound states of a square-well potential in three dimensions subject to an axial driving force. In the nonperturbative regime we show how eigenfunctions develop an asymptotic dressing of different partial waves, accompanied by large periodic oscillations in the angular momentum and a nonmonotonous dependence of the decay rate on the drive strength. We extend these results to the strong driving regime near a resonant intersection of the quasi-energy surfaces of two bound states of different symmetry. Our approach can be applied to general quantum scattering problems of particles subject to periodic fields.

  15. Emergence of spike correlations in periodically forced excitable systems

    E-Print Network [OSTI]

    Jose A. Reinoso; M. C. Torrent; Cristina Masoller

    2015-10-30

    In sensory neurons the presence of noise can facilitate the detection of weak information-carrying signals, which are encoded and transmitted via correlated sequences of spikes. Here we investigate relative temporal order in spike sequences induced by a subthreshold periodic input, in the presence of white Gaussian noise. To simulate the spikes, we use the FitzHugh-Nagumo model, and to investigate the output sequence of inter-spike intervals (ISIs), we use the symbolic method of ordinal analysis. We find different types of relative temporal order, in the form of preferred ordinal patterns which depend on both, the strength of the noise and the period of the input signal. We also demonstrate a resonance-like behavior, as certain periods and noise levels enhance temporal ordering in the ISI sequence, maximizing the probability of the preferred patterns. Our findings could be relevant for understanding the mechanisms underlying temporal coding, by which single sensory neurons represent in spike sequences the information about weak periodic stimuli.

  16. Periodic bedrock ridges on Mars David R. Montgomery,1

    E-Print Network [OSTI]

    Montgomery, David R.

    Periodic bedrock ridges on Mars David R. Montgomery,1 Joshua L. Bandfield,1 and Scott K. Becker1 to be widespread [Carr, 1981; Greeley et al., 1992; Malin and Edgett, 2001]. Although wind-streamlined yardangs interpreted as sedimentary forms [McCauley et al., 1972; Cutts and Smith, 1973; Carr, 1981; Greeley et al

  17. Particle energization through time-periodic helical magnetic fields

    E-Print Network [OSTI]

    Mitra, Dhrubaditya

    We solve for the motion of charged particles in a helical time-periodic ABC (Arnold-Beltrami-Childress) magnetic field. The magnetic field lines of a stationary ABC field with coefficients A=B=C=1 are chaotic, and we show ...

  18. Periodic fluctuations in deep water formation due to sea ice

    E-Print Network [OSTI]

    Raj Saha

    2015-02-21

    During the last ice age several quasi-periodic abrupt warming events took place. Known as Dansgaard-Oeschger (DO) events their effects were felt globally, although the North Atlantic experienced the largest temperature anomalies. Paleoclimate data shows that the fluctuations often occurred right after massive glacial meltwater releases in the North Atlantic and in bursts of three or four with progressively decreasing strengths. In this study a simple dynamical model of an overturning circulation and sea ice is developed with the goal of understanding the fundamental mechanisms that could have caused the DO events. Interaction between sea ice and the overturning circulation in the model produces self-sustained oscillations. Analysis and numerical experiments reveal that the insulating effect of sea ice causes the ocean to periodically vent out accumulated heat in the deep ocean into the atmosphere. Subjecting the model to idealized freshwater forcing mimicking Heinrich events causes modulation of the natural periodicity and produces burst patterns very similar to what is observed in temperature proxy data. Numerical experiments with the model also suggests that the characteristic period of 1,500 years is due to the geometry, or the effective heat capacity, of the ocean that comes under sea ice cover.

  19. Passive Tracer Dispersion with Random or Periodic Source \\Lambda

    E-Print Network [OSTI]

    Passive Tracer Dispersion with Random or Periodic Source \\Lambda Jinqiao Duan Clemson University sources on the pattern formation and long­time behavior of concentration pro­ files of passive tracers Introduction The dispersion of passive tracers (or passive scalars) occur in various geo­ physical

  20. Passive Tracer Dispersion with Random or Periodic Source

    E-Print Network [OSTI]

    Passive Tracer Dispersion with Random or Periodic Source Jinqiao Duan Clemson University sources on the pattern formation and long-time behavior of concentration pro- #12;les of passive tracers #12;1 Introduction The dispersion of passive tracers (or passive scalars) occur in various geo

  1. Greedy Approaches to Static Stochastic Robust Resource Allocation for Periodic

    E-Print Network [OSTI]

    Maciejewski, Anthony A.

    Greedy Approaches to Static Stochastic Robust Resource Allocation for Periodic Sensor Driven@us.ibm.com Abstract-- This research investigates the problem of robust resource allocation for a large class. Such systems are expected to function in an environment replete with uncertainty where the workload is likely

  2. lthough Earth has undergone many periods of significant environmen-

    E-Print Network [OSTI]

    Horton, Tom

    A lthough Earth has undergone many periods of significant environmen- tal change, the planet push the Earth system outside the stable environmental state of the Holocene, with consequences occurred naturally and Earth's regu- latory capacity maintained the conditions that enabled human

  3. The Chinese Calendar of The Later Han Period

    E-Print Network [OSTI]

    Aslaksen, Helmer

    The Chinese Calendar of The Later Han Period Undergraduate Research Opportunities Programme would like to learn some basic knowledge in the Chinese calendar, which is an important part of the Chinese culture and Chinese history. However, by the time we decided to take this project, the deadline

  4. Temperature-induced marine export production during glacial period

    E-Print Network [OSTI]

    Chikamoto, Megumi O.

    Temperature-induced marine export production during glacial period M. O. Chikamoto,1,2 A. Abe October 2012; published 8 November 2012. [1] Proxy records indicate that export production was enhanced at the onset of the last glaciation. We examine how glacial cooling affects marine export production through

  5. Bifurcation and Stability Properties of Periodic Solutions to Two Nonlinear

    E-Print Network [OSTI]

    Fiedler, Bernold

    motions of suspension bridges. Though they were able to replicate the phenomena observed on the Tacoma in suspen- sion bridges. We contrast the multiplicity, bifurcation, and stability of periodic solutions-doubling and quadrupling) differs significantly. Keywords: suspension bridge, continuation, bifurcation, stability

  6. Urban Water Demand with Periodic Error Correction David R. Bell

    E-Print Network [OSTI]

    Griffin, Ronald

    them. Econometric estimates of residential demand for water abound (Dalhuisen et al. 2003Urban Water Demand with Periodic Error Correction by David R. Bell and Ronald C. Griffin February, Department of Agricultural Economics, Texas A&M University. #12;Abstract Monthly demand for publicly supplied

  7. RIEMANN SURFACES, PLANE ALGEBRAIC CURVES AND THEIR PERIOD MATRICES

    E-Print Network [OSTI]

    numerically the canonical map. Therefore symmetric 1991 Mathematics Subject Classification. 14Q05, 14H55, 14P for computing a representation of a compact Riemann surface as an algebraic plane curve and to compute a numerical approximation for its period matrix. We will describe a program Cars ([3]) that can be used

  8. Oscillations with uniquely long periods in a microfluidic bubble generator

    E-Print Network [OSTI]

    Loss, Daniel

    LETTERS Oscillations with uniquely long periods in a microfluidic bubble generator PIOTR GARSTECKI1 generator that shows stable oscillatory patterns (both in space and time) of unanticipated complexity to a single outlet channel. In this geometry, the pinch-off process that generates bubbles is regulated17

  9. Marchenko-Ostrovski mappings for periodic Jacobi matrices

    E-Print Network [OSTI]

    Evgeny Korotyaev; Anton Kutsenko

    2007-10-15

    We consider the 1D periodic Jacobi matrices. The spectrum of this operator is purely absolutely continuous and consists of intervals separated by gaps. We solve the inverse problem (including characterization) in terms of vertical slits on the quasimomentum domain . Furthermore, we obtain a priori two-sided estimates for vertical slits in terms of Jacoby matrices.

  10. Local Lyapunov Functions for periodic and finite-time ODEs

    E-Print Network [OSTI]

    Hafstein, Sigurður Freyr

    Local Lyapunov Functions for periodic and finite-time ODEs Peter Giesl and Sigurdur Hafstein Abstract Lyapunov functions for general systems are difficult to construct. How- ever, for autonomous Lyapunov function by solving a matrix equa- tion. Consequently, the same function is a local Lyapunov

  11. Strategic Sourcing Dashboard Reporting Period: January 2010 through December 2011

    E-Print Network [OSTI]

    Minnesota, University of

    We have accomplished $10.8 million in annual savings through our Strategic Sourcing efforts over below. Strategic Sourcing continues to have a significant emphasis for Purchasing Services, but savings/Activities/Risks for this Reporting Period Annual savings of over $200,000 was booked in the last quarter in the office and lab supply

  12. NANO EXPRESS Fabrication of Large Area Periodic Nanostructures Using

    E-Print Network [OSTI]

    Mohseni, Hooman

    , such as photonic band-gap materials, high dense data storage, and photonic devices. We have developed a maskless areas, such as photonic band-gap materials [1], high dense data storage [2], and photonic devices [3NANO EXPRESS Fabrication of Large Area Periodic Nanostructures Using Nanosphere Photolithography

  13. Total Estimated Contract Cost: Contract Option Period: Performance

    Office of Environmental Management (EM)

    Performance Period Fee Earned FY2000 thru 2008 102,622,325 FY2009 12,259,719 FY2010 35,789,418 FY2011 24,126,240 FY2012 24,995,209 FY2013 6,340,762 FY2014 16,285,867 FY2015...

  14. Plasma Vitamin D and Prostate Cancer Risk: Results from the Selenium and Vitamin E Cancer Prevention Trial

    E-Print Network [OSTI]

    2014-01-01

    Biomarkers & Prevention Plasma Vitamin D and Prostate Cancerfrom the Selenium and Vitamin E Cancer Prevention Trial Alanwho are using supplemental vitamin D should limit their dose

  15. EE 511 Solutions to Problem Set 8 1. E[Yt] = E[Xt] cos 2fct. E[Yt] is periodic with period 1/fc.

    E-Print Network [OSTI]

    Bhashyam, Srikrishna

    EE 511 Solutions to Problem Set 8 1. E[Yt] = E[Xt] cos 2fct. E[Yt] is periodic with period 1/fc. RY (t, t + ) = E[Xt+ cos 2fc(t + )Xt cos 2fct] = RX() 2 [cos 2fc + cos 2fc(2t + )] RY (t, t + ) is periodic with period 1/(2fc). Therefore, Yt is wide-sense cyclostationary with period 1/fc. E[Zt] = E[Xt]E[cos

  16. Emergency Diesel Generation System Surveillance Test Policy Optimization Through Genetic Algorithms Using Non-Periodic Intervention Frequencies and Seasonal Constraints

    SciTech Connect (OSTI)

    Lapa, Celso M.F.; Pereira, Claudio M.N.A. [CNEN, Comissao Nacional de Energia Nuclear, Rua General Severiano 90, Rio de Janeiro, RJ-22-294-900 (Brazil); Frutuoso e Melo, P.F. [COPPE/UFRJ, Cidade Universitaria, Centro de Tecnologia, Bloco G, sala 101, Ilha do Fundao, 21945-970, Rio de Janeiro - RJ (Brazil)

    2002-07-01

    Nuclear standby safety systems must frequently, be submitted to periodic surveillance tests. The main reason is to detect, as soon as possible, the occurrence of unrevealed failure states. Such interventions may, however, affect the overall system availability due to component outages. Besides, as the components are demanded, deterioration by aging may occur, penalizing again the system performance. By these reasons, planning a good surveillance test policy implies in a trade-off between gains and overheads due to the surveillance test interventions. In order maximize the systems average availability during a given period of time, it has recently been developed a non-periodic surveillance test optimization methodology based on genetic algorithms (GA). The fact of allowing non-periodic tests turns the solution space much more flexible and schedules can be better adjusted, providing gains in the overall system average availability, when compared to those obtained by an optimized periodic tests scheme. The optimization problem becomes, however, more complex. Hence, the use of a powerful optimization technique, such as GAs, is required. Some particular features of certain systems can turn it advisable to introduce other specific constraints in the optimization problem. The Emergency Diesel Generation System (EDGS) of a Nuclear Power Plant (N-PP) is a good example for demonstrating the introduction of seasonal constraints in the optimization problem. This system is responsible for power supply during an external blackout. Therefore, it is desirable during periods of high blackout probability to maintain the system availability as high as possible. Previous applications have demonstrated the robustness and effectiveness of the methodology. However, no seasonal constraints have ever been imposed. This work aims at investigating the application of such methodology in the Angra-II Brazilian NPP EDGS surveillance test policy optimization, considering the blackout probability growth during summer, due to the electrical power demand increase. Here, the model used penalizes test interventions by a continuous modulating function, which depends on the instantaneous blackout probability. Results have demonstrated the ability of the method in adapting the surveillance tests policy to seasonal behaviors. The knowledge acquired by the GA during the searching process has lead to test schedules that drastically minimize the test interventions at periods of high blackout probability. It is compensated by more frequent tests redistributed through the periods of low blackout probability, in order to provide improvement on the overall average availability at the system level. (authors)

  17. The INTERVAL Trial to determine whether intervals between blood donations can be safely and acceptably decreased to optimise blood supply: study protocol for a randomised controlled trial

    E-Print Network [OSTI]

    Moore, Carmel; Sambrook, Jennifer; Walker, Matthew; Tolkien, Zoe; Kaptoge, Stephen; Allen, David; Mehenny, Susan; Mant, Jonathan; Di Angelantonio, Emanuele; Thompson, Simon G.; Ouwehand, Willem; Roberts, David J.; Danesh, John

    2014-09-17

    includes a minimisa- tion algorithm to ensure that key prognostic characteris- tics are balanced across the trial arms at baseline (for example, new/repeat donor status, weight and age, as shown in Table 2). Randomisation was stratified by do- nation centre... -axial accelerometer AX3 (Axivity, York, UK) to measure the impact of more frequent blood donations Serious adverse events, diagnosed/ Heart problems including heart charge of a vehicle) New illness Diagnoses of low iron Diagnosis of low haemoglobin by NHSBT Diagnosis...

  18. Laboratory Applications

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURING OFFICE INDUSTRIALU.S. DepartmentJeanKeyLANLLG:KAHUKULaboratory Applications What

  19. Template for NIH Instruction in the Responsible Conduct of Research This section is limited to 1 page for individual award applications for Fellowships (F) and Career Development (K), and to 3 pages for Institutional

    E-Print Network [OSTI]

    Finley Jr., Russell L.

    for Institutional Training (T) award applications. Renewal applications must describe any changes in formal/or discussion leaders during the past project period must be named in the application. Please adapt

  20. Particle energization through time-periodic helical magnetic fields

    E-Print Network [OSTI]

    Mitra, Dhrubaditya; Dasgupta, Brahmananda; Niklasson, Eyvind; Ram, Abhay

    2013-01-01

    We solve for the motion of charged particles in a helical time-periodic ABC (Arnold-Beltrami-Childress) magnetic field. The magnetic field lines of a stationary ABC field with $A=B=C=1$ are chaotic, and we show that the motion of a charged particle in such a field is also chaotic at late time with positive Lyapunov exponent. We further show that in time-periodic (frequency $\\omega$) ABC fields the kinetic energy of a charged particle can increase indefinitely with time. At late times the mean kinetic energy grows as a power law in time with exponent $\\xi$ that approaches unity. For an initial distribution of particles, whose kinetic energy is uniformly distributed within some interval, the PDF of kinetic energy is, at late time, close to a Gaussian but with steeper tails.

  1. Particle energization through time-periodic helical magnetic fields

    E-Print Network [OSTI]

    Dhrubaditya Mitra; Axel Brandenburg; Brahmananda Dasgupta; Eyvind Niklasson; Abhay Ram

    2014-04-30

    We solve for the motion of charged particles in a helical time-periodic ABC (Arnold-Beltrami-Childress) magnetic field. The magnetic field lines of a stationary ABC field with coefficients $A=B=C=1$ are chaotic, and we show that the motion of a charged particle in such a field is also chaotic at late times with positive Lyapunov exponent. We further show that in time-periodic ABC fields, the kinetic energy of a charged particle can increase indefinitely with time. At late times the mean kinetic energy grows as a power law in time with an exponent that approaches unity. For an initial distribution of particles, whose kinetic energy is uniformly distributed within some interval, the PDF of kinetic energy is, at late times, close to a Gaussian but with steeper tails.

  2. Parameters of Integral Circulant Graphs and Periodic Quantum Dynamics

    E-Print Network [OSTI]

    Nitin Saxena; Simone Severini; Igor Shparlinski

    2007-03-26

    The intention of the paper is to move a step towards a classification of network topologies that exhibit periodic quantum dynamics. We show that the evolution of a quantum system, whose hamiltonian is identical to the adjacency matrix of a circulant graph, is periodic if and only if all eigenvalues of the graph are integers (that is, the graph is integral). Motivated by this observation, we focus on relevant properties of integral circulant graphs. Specifically, we bound the number of vertices of integral circulant graphs in terms of their degree, characterize bipartiteness and give exact bounds for their diameter. Additionally, we prove that circulant graphs with odd order do not allow perfect state transfer.

  3. Periodic fluctuations in deep water formation due to sea ice

    E-Print Network [OSTI]

    Saha, Raj

    2015-01-01

    During the last ice age several quasi-periodic abrupt warming events took place. Known as Dansgaard-Oeschger (DO) events their effects were felt globally, although the North Atlantic experienced the largest temperature anomalies. Paleoclimate data shows that the fluctuations often occurred right after massive glacial meltwater releases in the North Atlantic and in bursts of three or four with progressively decreasing strengths. In this study a simple dynamical model of an overturning circulation and sea ice is developed with the goal of understanding the fundamental mechanisms that could have caused the DO events. Interaction between sea ice and the overturning circulation in the model produces self-sustained oscillations. Analysis and numerical experiments reveal that the insulating effect of sea ice causes the ocean to periodically vent out accumulated heat in the deep ocean into the atmosphere. Subjecting the model to idealized freshwater forcing mimicking Heinrich events causes modulation of the natural p...

  4. Periodic Schrödinger operators with local defects and spectral pollution

    E-Print Network [OSTI]

    Eric Cancès; Virginie Ehrlacher; Yvon Maday

    2011-11-16

    This article deals with the numerical calculation of eigenvalues of perturbed periodic Schr\\"odinger operators located in spectral gaps. Such operators are encountered in the modeling of the electronic structure of crystals with local defects, and of photonic crystals. The usual finite element Galerkin approximation is known to give rise to spectral pollution. In this article, we give a precise description of the corresponding spurious states. We then prove that the supercell model does not produce spectral pollution. Lastly, we extend results by Lewin and S\\'er\\'e on some no-pollution criteria. In particular, we prove that using approximate spectral projectors enables one to eliminate spectral pollution in a given spectral gap of the reference periodic Sch\\"odinger operator.

  5. Inverse design of periodic metallic slits for extraordinary optical transmission

    E-Print Network [OSTI]

    Deng, Yongbo; Liu, Zhenyu; Wu, Yihui

    2016-01-01

    The inverse design methodology of periodic metallic slits for extraordinary optical transmission is presented based on the topology optimization method. Several topological configurations of periodic metallic slits with typical subwavelength size are derived with transmission peaks at the prescribed incident wavelengths in the visible light region, where the transmissivity is enhanced by effective excitation of surface-plasmon-polariton at the inlet side of the slit, Fabry-P\\'erot resonance of surface-plasmon-polariton inside the slit and radiation of the electromagnetic energy at the outlet side of the slit. The transmission peaks of the derived metallic configurations are raised along with the red shift of the incident wavelength, because of the reduction of the energy absorption and increase of the propagation distance of surface-plasmon-polariton. And the shift of transmission peak is controlled by prescribing a different incident wavelength in the corresponding topology optimization problem. To reduce th...

  6. Period change and stellar evolution of $\\beta$ Cephei stars

    E-Print Network [OSTI]

    Neilson, Hilding R

    2015-01-01

    The $\\beta$ Cephei stars represent an important class of massive star pulsators probing the evolution of B-type stars and the transition from main sequence to hydrogen-shell burning evolution. By understanding $\\beta$ Cep stars, we gain insights into the detailed physics of massive star evolution such as rotational mixing, convective core overshooting, magnetic fields and stellar winds, all of which play important roles. Similarly, modeling their pulsation provides additional information into their interior structures. Furthermore, measurements of the rate of change of pulsation period offer a direct measure of $\\beta$ Cephei stellar evolution. In this work, we compute state-of-the-art stellar evolution models assuming different amounts of initial rotation and convective core overshoot and measure theoretical rates of period change for which we compare to rates previously measured for a sample of $\\beta$ Cephei stars. The results of this comparison are mixed. For three stars, the rates are too small to infer ...

  7. Quasi-periodic quantum dot arrays produced by electrochemical synthesis

    SciTech Connect (OSTI)

    Bandyopadhyay, S.; Miller, A.E.; Yue, D.F.; Banerjee, G.; Ricker, R.E.; Jones, S.; Eastman, J.A.; Baugher, E.; Chandrasekhar, M.

    1994-06-01

    We discuss a ``gentle`` electrochemical technique for fabricating quasi-periodic quantum dot arrays. The technique exploits a self-organizing phenomenon to produce quasi-periodic arrangement of dots and provides excellent control over dot size and interdot spacing. Unlike conventional nanolithography, it does not cause radiation damage to the structures during exposure to pattern delineating beams (e-beam, ion-beam or x-ray). Moreover, it does not require harsh processing steps like reactive ion etching, offers a minimum feature size of {approximately}40 {angstrom}, allows the fabrication of structures on nonplanar surfaces (e.g. spherical or cylindrical substrates), is amenable to mass production (millions of wafers can be processed simultaneously) and is potentially orders of magnitude cheaper than conventional nanofabrication. In this paper, we describe our initial results and show the promise of this technique for low-cost and high-yield nanosynthesis.

  8. High field pulsed microwiggler comprising a conductive tube with periodically space slots

    DOE Patents [OSTI]

    Warren, R.W.

    1992-09-01

    A microwiggler assembly produces large magnetic fields for oscillating charged particle beams, particularly electron beams for free electron laser (FEL) application. A tube of electrically conductive material is formed with radial slots axially spaced at the period of the electron beam. The slots have alternate 180[degree] relationships and are formed to a maximum depth of 0.6 to 0.7 times the tube circumference. An optimum slot depth is selected to eliminate magnetic quadrupole fields within the microwiggler as determined from a conventional pulsed wire technique. Suitable slot configurations include single slits, double slits, triple slits, and elliptical slots. An axial electron beam direction is maintained by experimentally placing end slits adjacent entrance and exit portions of the assembly, where the end slit depth is determined by use of the pulsed wire technique outside the tube. 10 figs.

  9. High field pulsed microwiggler comprising a conductive tube with periodically space slots

    DOE Patents [OSTI]

    Warren, Roger W. (Santa Fe, NM)

    1992-01-01

    A microwiggler assembly produces large magnetic fields for oscillating ched particle beams, particularly electron beams for free electron laser (FEL) application. A tube of electrically conductive material is formed with radial slots axially spaced at the period of the electron beam. The slots have alternate 180.degree. relationships and are formed to a maximum depth of 0.6 to 0.7 times the tube circumference. An optimum slot depth is selected to eliminate magnetic quadrupole fields within the microwiggler as determined from a conventional pulsed wire technique. Suitable slot configurations include single slits, double slits, triple slits, and elliptical slots. An axial electron beam direction is maintained by experimentally placing end slits adjacent entrance and exit portions of the assembly, where the end slit depth is determined by use of the pulsed wire technique outside the tube.

  10. Derivation of effective macroscopic Stokes-Cahn-Hilliard equations for periodic immiscible flows in porous media

    E-Print Network [OSTI]

    Markus Schmuck; Marc Pradas; Gregorios A. Pavliotis; Serafim Kalliadasis

    2013-10-19

    Using thermodynamic and variational principles we examine a basic phase field model for a mixture of two incompressible fluids in strongly perforated domains. With the help of the multiple scale method with drift and our recently introduced splitting strategy for Ginzburg-Landau/Cahn-Hilliard-type equations [Schmuck et al., Proc. R. Soc. A 468:3705-3724, 2012.], we rigorously derive an effective macroscopic phase field formulation under the assumption of periodic flow and a sufficiently large P\\'eclet number. As for classical convection-diffusion problems, we obtain systematically diffusion-dispersion relations (including Taylor-Aris-dispersion). Our results also provide a convenient analytical and computational framework to macroscopically track interfaces in porous media. In view of the well-known versatility of phase field models, our study proposes a promising model for many engineering and scientific applications such as multiphase flows in porous media, microfluidics, and fuel cells.

  11. Engineering Physics and Mathematics Division progress report for period ending December 31, 1994

    SciTech Connect (OSTI)

    Sincovec, R.F.

    1995-07-01

    This report provides a record of the research activities of the Engineering Physics and Mathematics Division for the period January 1, 1993, through December 31, 1994. This report is the final archival record of the EPM Division. On October 1, 1994, ORELA was transferred to Physics Division and on January 1, 1995, the Engineering Physics and Mathematics Division and the Computer Applications Division reorganized to form the Computer Science and Mathematics Division and the Computational Physics and Engineering Division. Earlier reports in this series are identified on the previous pages, along with the progress reports describing ORNL`s research in the mathematical sciences prior to 1984 when those activities moved into the Engineering Physics and Mathematics Division.

  12. Maximum population transfer in a periodically driven two-level system

    E-Print Network [OSTI]

    P. M. Poggi; F. J. Arranz; R. M. Benito; F. Borondo; D. A. Wisniacki

    2014-12-03

    We study the dynamics of a two-level quantum system under the influence of sinusoidal driving in the intermediate frequency regime. Analyzing the Floquet quasienergy spectrum, we find combinations of the field parameters for which population transfer is optimal and takes place through a series of well defined steps of fixed duration. We also show how the corresponding evolution operator can be approximated at all times by a very simple analytical expression. We propose this model as being specially suitable for treating periodic driving at avoided crossings found in complex multi-level systems, and thus show a relevant application of our results to designing a control protocol in a realistic molecular model

  13. Discharge formation systems for generating atomic iodine in a pulse-periodic oxygen–iodine laser

    SciTech Connect (OSTI)

    Aksinin, V I; Kazantsev, S Yu; Kononov, I G; Podlesnykh, S V; Firsov, K N [A M Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation); Antsiferov, S A; Velikanov, S D; Gerasimov, A Yu; Gostev, I V; Kalinovskii, V V; Konovalov, V V; Mikhalkin, V N; Sevryugin, I V [Russian Federal Nuclear Center 'All-Russian Research Institute of Experimental Physics', Sarov, Nizhnii Novgorod region (Russian Federation)

    2014-01-31

    Generation characteristics of a pulse-periodic oxygen–iodine laser with the electro-discharge production of atomic iodine were compared with inductively stabilised edged or anisotropic- resistive cathodes used for ignition of the volume discharge. The discharge was initiated by the radiation of a barrier discharge from the side of a grid anode. It was found that at equal specific electrical energy depositions to the gas-discharge plasma, the system with the anisotropic-resistive cathode provides a more stable and uniform volume discharge with the possibility of varying the composition and pressure of working mixtures over a wide range and a greater specific extraction of laser energy is observed (up to 2.4 J L{sup -1}). At a high pulse repetition rate of laser pulses (50 – 100 Hz) and long duration of the pulse trains (longer than a minute) the surface of anisotropic-resistive cathode became eroded. (laser applications and other topics in quantum electronics)

  14. Periodic nanostructures from self assembled wedge-type block-copolymers

    DOE Patents [OSTI]

    Xia, Yan; Sveinbjornsson, Benjamin R.; Grubbs, Robert H.; Weitekamp, Raymond; Miyake, Garret M.; Piunova, Victoria; Daeffler, Christopher Scot

    2015-06-02

    The invention provides a class of wedge-type block copolymers having a plurality of chemically different blocks, at least a portion of which incorporates a wedge group-containing block providing useful properties. For example, use of one or more wedge group-containing blocks in some block copolymers of the invention significantly inhibits chain entanglement and, thus, the present block copolymers materials provide a class of polymer materials capable of efficient molecular self-assembly to generate a range of structures, such as periodic nanostructures and microstructures. Materials of the present invention include copolymers having one or more wedge group-containing blocks, and optionally for some applications copolymers also incorporating one or more polymer side group-containing blocks. The present invention also provides useful methods of making and using wedge-type block copolymers.

  15. General model selection estimation of a periodic regression with a Gaussian noise

    E-Print Network [OSTI]

    Konev, Victor; 10.1007/s10463-008-0193-1

    2010-01-01

    This paper considers the problem of estimating a periodic function in a continuous time regression model with an additive stationary gaussian noise having unknown correlation function. A general model selection procedure on the basis of arbitrary projective estimates, which does not need the knowledge of the noise correlation function, is proposed. A non-asymptotic upper bound for quadratic risk (oracle inequality) has been derived under mild conditions on the noise. For the Ornstein-Uhlenbeck noise the risk upper bound is shown to be uniform in the nuisance parameter. In the case of gaussian white noise the constructed procedure has some advantages as compared with the procedure based on the least squares estimates (LSE). The asymptotic minimaxity of the estimates has been proved. The proposed model selection scheme is extended also to the estimation problem based on the discrete data applicably to the situation when high frequency sampling can not be provided.

  16. The periodic standing-wave approximation: computations in full general relativity

    E-Print Network [OSTI]

    Napoleon Hernandez; Richard H. Price

    2008-12-23

    The periodic standing wave method studies circular orbits of compact objects coupled to helically symmetric standing wave gravitational fields. From this solution an approximation is extracted for the strong field, slowly inspiralling motion of binary black holes and binary neutron stars. Previous work on this project has developed a method using a few multipoles of specially adapted coordinates well suited both to the radiation and the source regions. This method had previously been applied to linear and nonlinear scalar field models, to linearized gravity, and to a post-Minkowski approximation. Here we present the culmination of this approach: the application of the method in full general relativity. The fundamental equations had previously been developed and the challenge presented by this step is primarily a computational one which was approached with an innovative technique. The numerical results of these computations are compared with the corresponding results from linearized and post-Minkowksi computations.

  17. Controlling chaos in low-and high-dimensional systems with periodic parametric perturbations K. A. Mirus and J. C. Sprott

    E-Print Network [OSTI]

    Sprott, Julien Clinton

    Controlling chaos in low- and high-dimensional systems with periodic parametric perturbations K. A-dimensional systems. Initial application to the control of fluctuations in a prototypical magnetic fusion plasma. INTRODUCTION Since the pioneering work of Ott, Grebogi, and Yorke OGY in controlling chaotic systems 1

  18. Period tripling causes rotating spirals in agitated wet granular layers

    E-Print Network [OSTI]

    Kai Huang; Ingo Rehberg

    2011-07-07

    Pattern formation of a thin layer of vertically agitated wet granular matter is investigated experimentally. Rotating spirals with three arms, which correspond to the kinks between regions with different colliding phases, are the dominating pattern. This preferred number of arms corresponds to period tripling of the agitated granular layer, unlike predominantly subharmonic Faraday crispations in dry granular matter. The chirality of the spatiotemporal pattern corresponds to the rotation direction of the spirals.

  19. Sorting by Periodic Potential Energy Landscapes: Optical Fractionation

    E-Print Network [OSTI]

    Kosta Ladavac; Karen Kasza; David G. Grier

    2003-10-16

    Viscously damped objects driven through a periodically modulated potential energy landscape can become kinetically locked in to commensurate directions through the landscape, and thus can be deflected away from the driving direction. We demonstrate that the threshold for an object to become kinetically locked in to an array can depend exponentially on its size. When implemented with an array of holographic optical tweezers, this provides the basis for a continuous and continuously optimized sorting technique for mesoscopic objects called ``optical fractionation''.

  20. EIS-0391: Notice to Extend Scoping Period | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based|Department of5Department ofto Extend Scoping Period EIS-0391: Notice to

  1. Enforcement Policy Statement: Compliance Period for Regional Standards

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12, 2015 Infographiclighbulbs - high-resolution JPG20,1LLC |Compliance Period for

  2. Magnetic field gradients in solar wind plasma and geophysics periods

    E-Print Network [OSTI]

    A. Bershadskii

    2006-11-16

    Using recent data obtained by Advanced Composition Explorer (ACE) the pumping scale of the magnetic field gradients of the solar wind plasma has been calculated. This pumping scale is found to be equal to 24h $\\pm$ 2h. The ACE spacecraft orbits at the L1 libration point which is a point of Earth-Sun gravitational equilibrium about 1.5 million km from Earth. Since the Earth's magnetosphere extends into the vacuum of space from approximately 80 to 60,000 kilometers on the side toward the Sun the pumping scale cannot be a consequence of the 24h-period of the Earth's rotation. Vise versa, a speculation is suggested that for the very long time of the coexistence of Earth and of the solar wind the weak interaction between the solar wind and Earth could lead to stochastic synchronization between the Earth's rotation and the pumping scale of the solar wind magnetic field gradients. This synchronization could transform an original period of the Earth's rotation to the period close to the pumping scale of the solar wind magnetic field gradients.

  3. Optical filter including a sub-wavelength periodic structure and method of making

    DOE Patents [OSTI]

    Kaushik, S.; Stallard, B.R.

    1998-03-10

    An optical filter includes a dielectric layer formed within a resonant optical cavity, with the dielectric layer having formed therein a sub-wavelength periodic structure to define, at least in part, a wavelength for transmission of light through the resonant optical cavity. The sub-wavelength periodic structure can be formed either by removing material from the dielectric layer (e.g. by etching through an electron-beam defined mask), or by altering the composition of the layer (e.g. by ion implantation). Different portions of the dielectric layer can be patterned to form one or more optical interference filter elements having different light transmission wavelengths so that the optical filter can filter incident light according to wavelength and/or polarization. For some embodiments, the optical filter can include a detector element in optical alignment with each optical interference filter element to quantify or measure the filtered light for analysis thereof. The optical filter has applications to spectrometry, colorimetry, and chemical sensing. 17 figs.

  4. Do measures of plant intake and digestibility from captive feeding trials align with foraging patterns of free-ranging

    E-Print Network [OSTI]

    Do measures of plant intake and digestibility from captive feeding trials align with foraging. Email: wirsinga@uw.edu Abstract Context. Measures of intake and digestibility from captive feeding of snowshoe hares in captive intake and digestion trials with those of free-living conspecifics in the species

  5. Non-Foster Circuit Loaded Periodic Structures for Broadband Fast and Slow Wave Propagation

    E-Print Network [OSTI]

    Long, Jiang

    2015-01-01

    1.1 Periodic Structure, Fast and Slow Wave Propagation . 1.2for a periodic structure. . . . . . . Slow and fast waveA unit cell of a periodic structure . . . . .

  6. Applicant Information

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L O O D SFederal Facility AgreementAppendixApplianceApplicant

  7. The Ideal Evaluation of a Risk Prediction Model: A Randomized Clinical Trial

    E-Print Network [OSTI]

    Brent, Roger

    The Ideal Evaluation of a Risk Prediction Model: A Randomized Clinical Trial Holly Janes Fred Hutchinson Cancer Research Center 1/25 #12;Context Often a risk prediction model is developed to identify high risk subjects who can benefit from preventative therapy E.g. Framingham risk model to identify

  8. Quick start guide for IBM Cognos 8 Business Intelligence online trial

    E-Print Network [OSTI]

    Quick start guide for IBM Cognos 8 Business Intelligence online trial IBM Cognos 8 Business Intelligence comes with a "Quick Tour" and a "Getting Started Guide". It is recommended that you take Cognos 8 Business Intelligence" in the "Getting Started Guide". The "IBM Cognos Connection" is the portal

  9. GATEWAY Demonstrations: Trial Demonstration of Area Lighting Retrofit, Yuma Border Patrol, Yuma, Arizona

    SciTech Connect (OSTI)

    Wilkerson, A. M.; McCullough, J. J.

    2014-12-31

    Along the Yuma Sector Border Patrol Area in Yuma, Arizona, the GATEWAY program conducted a trial demonstration in which the incumbent quartz metal halide area lighting was replaced with LED at three pole locations at the Yuma Sector Border Patrol Area in Yuma, Arizona. The retrofit was documented to better understand LED technology performance in high-temperature environments.

  10. A Trial of Generation of Carbon Nanotubes from C60 Ryosuke Kojimaa

    E-Print Network [OSTI]

    Maruyama, Shigeo

    A Trial of Generation of Carbon Nanotubes from C60 Ryosuke Kojimaa ,Shohei Chiashia ,Yuhei are similar to fullerene generation, then, the synthesis of nanotubes by C60 should have less activation were analyzed by SEM, TEM and Raman spectroscopy. Fig. 1 shows examples of TEM image of MWNTs generated

  11. Building a library of eligibility criteria to support design of clinical trials

    E-Print Network [OSTI]

    van Harmelen, Frank

    Building a library of eligibility criteria to support design of clinical trials Krystyna Milian1 the design of eligibility criteria, enable the reuse of well-structured criteria and to provide meaningful, Eligibility criteria, Formalization of eligibility criteria, Sup- porting design of eligibility criteria 1

  12. Analysis of Subgroup Effects in Randomized Tri-als When Subgroup Membership is Informatively

    E-Print Network [OSTI]

    Scharfstein, Daniel

    , and the statistical procedures used to estimate the effect of interest and its uncertainty. It is a particularly statistically and scientifically plausible bounds on effect estimates, facilitating the translation of clinical in the trial, with the vast majority of these observations in the intervention arm. We present a statistical

  13. CRC -PATIENT REGISTRATION ONTO A CLINICAL TRIAL AND PROCEDURE FOR CHARGING PIC SERVICES

    E-Print Network [OSTI]

    Oliver, Douglas L.

    CRC - PATIENT REGISTRATION ONTO A CLINICAL TRIAL AND PROCEDURE FOR CHARGING PIC SERVICES Study that produces Protocol Induced Costs PIC 1. Coordinator will complete voucher, including research label "" and case number, documenting PIC associated with the visit 2. Voucher containing research label

  14. PATIENT REGISTRATION ONTO A CLINICAL TRIAL AND PROCEDURE FOR CHARGING PIC SERVICES (EXCLUDES CRC)

    E-Print Network [OSTI]

    Oliver, Douglas L.

    PATIENT REGISTRATION ONTO A CLINICAL TRIAL AND PROCEDURE FOR CHARGING PIC SERVICES (EXCLUDES CRC to OCTR Patient visit that produces Protocol Induced Costs PIC 1. Coordinator will complete voucher, including research label "" and case number, documenting PIC associated with the visit 2. Voucher containing

  15. Sept/Oct 2008 ListProc Newsletter CSBA 2008 Convention Field Trials of Native Plants

    E-Print Network [OSTI]

    Ishida, Yuko

    Sept/Oct 2008 ________________________________________________________________________________ ListProc Newsletter CSBA 2008 Convention Field Trials of Native Plants Apiary Board Active 2009 4-H Essay topic Bee the list, then you do the same thing, but instead of sub, you use unsub or signoff, then the name

  16. Companies Participating in the 1996 Corn Performance Trials Company Brand Address

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    CARGILL HYBRID SEEDS CARGILL PO BOX 5645 MINNEAPOLIS MN 55440 DEKALB PLANT GENETICS DEKALB 3100 SYCAMORE MYCOGEN PO BOX 68 TULIA TX 79088 NORTHRUP KING CO. NORTHRUP KING PO BOX 959 MINNEAPOLIS MN 55440 PIONEER-6000 WILSON SEEDS, INC. WILSON PO BOX 391 HARLAN IA 51537 VIRGINIA CORN PERFORMANCE TRIALS IN 1996 Coordinated

  17. Companies Participating in the 1995 Corn Performance Trials Company Brand Address

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    MINNEAPOLIS MN 55440 CAVERNDALE FARMS INC. CAVERNDALE 1921 BLUEGRASS RD DANVILLE KY 40422-9293 DEKALB PLANT MINNEAPOLIS MN 55440 PIONEER HI-BRED INT., INC. PIONEER BRAND 1000 W JEFFERSON ST TIPTON IN 46072 SOUTHERN PO BOX 391 HARLAN IA 51537 VIRGINIA CORN PERFORMANCE TRIALS IN 1995 Coordinated by H. Behl, E. R

  18. A trial site planted with ash saplings. During the past year, Forest Research has continued to

    E-Print Network [OSTI]

    A trial site planted with ash saplings. Our Research During the past year, Forest Research has the range of our current research. Ash dieback: finding resistant trees Ash dieback (Chalara fraxinea) is affecting ash trees in Britain, especially East Anglia and Kent. This is a very serious disease of one

  19. Lung deflation and oxygen pulse in COPD: Results from the NETT randomized trial*

    E-Print Network [OSTI]

    Lung deflation and oxygen pulse in COPD: Results from the NETT randomized trial* Carolyn E. Come a July 2011 Available online 16 August 2011 KEYWORDS Cardiac function; Hyperinflation; Lung volume function. We examined whether lung deflation improves oxygen pulse, a surrogate marker of stroke volume

  20. An Open Ocean Trial of Controlled Upwelling Using Wave Pump Technology ANGELICQUE WHITE

    E-Print Network [OSTI]

    White, Angelicque

    An Open Ocean Trial of Controlled Upwelling Using Wave Pump Technology ANGELICQUE WHITE College) ABSTRACT In 1976, John D. Isaacs proposed to use wave energy to invert the density structure of the ocean of deep water to the surface ocean. Although Isaacs's wave-powered pump has taken many forms, from energy

  1. Market Trial: Selling Off-Grid Lighting Products in Rural Kenya

    SciTech Connect (OSTI)

    Tracy, Jennifer; Alstone, Peter; Jacobson, Arne; Mills, Evan

    2010-06-21

    In this study, we performed a market trial of off-grid LED lighting products in Maai Mahiu, arural Kenyan town. Our goals were to assess consumer demand and consumer preferences with respect to off-grid lighting systems and to gain feedback from off-grid lighting users at the point of purchase and after they have used to products for some time.

  2. TUNA: Pole-and-Line Fishing Trials In Central and Western Pacific

    E-Print Network [OSTI]

    TUNA: Pole-and-Line Fishing Trials In Central and Western Pacific R.N . Uchida and R .F . Sumida baiting and fishing data obtained aboard the Honolulu -based pole -and -line fishing vessel 'Anela in 1971 for the Angel Fishing Company of Honolulu. It was designed for pole -and - line fishing with live

  3. NASA-TM-III642 Design of Inielligent Mesoscale Periodic Array

    E-Print Network [OSTI]

    Asher, Sanford A.

    i" /} , NASA-TM-III642 Design of Inielligent Mesoscale Periodic Array Structures Utilizing Smart *National Research Council hitrodoetion Mesoscale Periodic Arlay Structures (MPAS, also known as crystalline

  4. Physics Division progress report for period ending September 30, 1983

    SciTech Connect (OSTI)

    Not Available

    1983-12-01

    Research and development activities are summarized in the following areas: Holifield Heavy Ion Research Facility, nuclear physics, the UNISOR program, accelerator-based atomic physics, theoretical physics, nuclear science applications, atomic physics and plasma diagnostics for fusion program, high-energy physics, the nuclear data project, and the relativistic heavy-ion collider study. Publications and papers presented are listed. (WHK)

  5. (Rev. 3/26/15) Page 1 APPLICATION FOR FELLOWSHIP SUPPORT

    E-Print Network [OSTI]

    Gabrieli, John

    research involve human subjects as defined at http://hst.mit.edu/academics/financial-support/human-subjects(Rev. 3/26/15) Page 1 APPLICATION FOR FELLOWSHIP SUPPORT REQUESTED FELLOWSHIP APPOINTMENT TERMS to submit one fellowship support form for the period. Please select all applicable terms APPLICANT

  6. HIV-1 transmission linkage in an HIV-1 prevention clinical trial

    SciTech Connect (OSTI)

    Leitner, Thomas; Campbell, Mary S; Mullins, James I; Hughes, James P; Wong, Kim G; Raugi, Dana N; Scrensen, Stefanie

    2009-01-01

    HIV-1 sequencing has been used extensively in epidemiologic and forensic studies to investigate patterns of HIV-1 transmission. However, the criteria for establishing genetic linkage between HIV-1 strains in HIV-1 prevention trials have not been formalized. The Partners in Prevention HSV/HIV Transmission Study (ClinicaITrials.gov NCT00194519) enrolled 3408 HIV-1 serodiscordant heterosexual African couples to determine the efficacy of genital herpes suppression with acyclovir in reducing HIV-1 transmission. The trial analysis required laboratory confirmation of HIV-1 linkage between enrolled partners in couples in which seroconversion occurred. Here we describe the process and results from HIV-1 sequencing studies used to perform transmission linkage determination in this clinical trial. Consensus Sanger sequencing of env (C2-V3-C3) and gag (p17-p24) genes was performed on plasma HIV-1 RNA from both partners within 3 months of seroconversion; env single molecule or pyrosequencing was also performed in some cases. For linkage, we required monophyletic clustering between HIV-1 sequences in the transmitting and seroconverting partners, and developed a Bayesian algorithm using genetic distances to evaluate the posterior probability of linkage of participants sequences. Adjudicators classified transmissions as linked, unlinked, or indeterminate. Among 151 seroconversion events, we found 108 (71.5%) linked, 40 (26.5%) unlinked, and 3 (2.0%) to have indeterminate transmissions. Nine (8.3%) were linked by consensus gag sequencing only and 8 (7.4%) required deep sequencing of env. In this first use of HIV-1 sequencing to establish endpoints in a large clinical trial, more than one-fourth of transmissions were unlinked to the enrolled partner, illustrating the relevance of these methods in the design of future HIV-1 prevention trials in serodiscordant couples. A hierarchy of sequencing techniques, analysis methods, and expert adjudication contributed to the linkage determination process.

  7. Field Trial of a Low-Cost, Distributed Plug Load Monitoring System

    SciTech Connect (OSTI)

    Auchter, B.; Cautley, D.; Ahl, D.; Earle, L.; Jin, X.

    2014-03-01

    Researchers have struggled to inventory and characterize the energy use profiles of the ever-growing category of so-called miscellaneous electric loads (MELs) because plug-load monitoring is cost-prohibitive to the researcher and intrusive to the homeowner. However, these data represent a crucial missing link to understanding how homes use energy. Detailed energy use profiles would enable the nascent automated home energy management (AHEM) industry to develop effective control algorithms that target consumer electronics and other plug loads. If utility and other efficiency programs are to incent AHEM devices, they need large-scale datasets that provide statistically meaningful justification of their investments by quantifying the aggregate energy savings achievable. To address this need, NREL researchers investigated a variety of plug-load measuring devices available commercially and tested them in the laboratory to identify the most promising candidates for field applications. This report centers around the lessons learned from a field validation of one proof-of-concept system, called Smartenit (formerly SimpleHomeNet). The system was evaluated based on the rate of successful data queries, reliability over a period of days to weeks, and accuracy. This system offers good overall performance when deployed with up to 10 end nodes in a residential environment, although deployment with more nodes and in a commercial environment is much less robust. NREL concludes that the current system is useful in selected field research projects, with the recommendation that system behavior is observed over time.

  8. Beyond periodic orbits: An example in nonhydrogenic atoms

    SciTech Connect (OSTI)

    Dando, P.A.; Monteiro, T.S.; Delande, D.; Taylor, K.T. (Department of Mathematics, Royal Holloway, University of London, Egham, Surrey, TW20 0EX (United Kingdom) Laboratoire Kastler-Brossel, Universite Pierre et Marie Curie, 4 place Jussieu, F-75005 Paris (France) Department of Applied Mathematics and Theoretical Physics, Queen's University Belfast, Belfast, BT7 1NN (United Kingdom))

    1995-02-13

    The spectrum of hydrogen in a magnetic field is a paradigm of quantum chaos and may be analyzed accurately by periodic-orbit-type theories. In nonhydrogenic atoms, the core induces pure quantum effects, especially additional spectral modulations, which cannot be analyzed reliably in terms of classical orbits and their stability parameters. Provided core-scattered waves are included consistently, core-scattered modulations as well as corrected amplitudes for primitive orbits are in excellent agreement with quantum results. We consider whether these systems correspond to quantum chaos.

  9. Bott-Kitaev Periodic Table and the Diagonal Map

    E-Print Network [OSTI]

    R. Kennedy; M. R. Zirnbauer

    2014-12-15

    Building on the 10-way symmetry classification of disordered fermions, the authors have recently given a homotopy-theoretic proof of Kitaev's "Periodic Table" for topological insulators and superconductors. The present paper offers an introduction to the physical setting and the mathematical model used. Basic to the proof is the so-called Diagonal Map, a natural transformation akin to the Bott map of algebraic topology, which increases by one unit both the momentum-space dimension and the symmetry index of translation-invariant ground states of gapped free-fermion systems. This mapping is illustrated here with a few examples of interest.

  10. PARC Periodical: Volume 5, Issue 3 | Photosynthetic Antenna Research Center

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeeding access toOctoberConsumptionPowered oscillator usingLowPeriodical-Volume

  11. Property:Building/StartPeriod | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsourceIIInformationEnergy InformationInformation Total Jump to:StartPeriod

  12. A Phase 2 Trial of Once-Weekly Hypofractionated Breast Irradiation: First Report of Acute Toxicity, Feasibility, and Patient Satisfaction

    SciTech Connect (OSTI)

    Dragun, Anthony E.; Quillo, Amy R.; Riley, Elizabeth C.; Roberts, Teresa L.; Hunter, Allison M.; Rai, Shesh N.; Callender, Glenda G.; Jain, Dharamvir; McMasters, Kelly M.; Spanos, William J.

    2013-03-01

    Purpose: To report on early results of a single-institution phase 2 trial of a 5-fraction, once-weekly radiation therapy regimen for patients undergoing breast-conserving surgery (BCS). Methods and Materials: Patients who underwent BCS for American Joint Committee on Cancer stage 0, I, or II breast cancer with negative surgical margins were eligible to receive whole breast radiation therapy to a dose of 30 Gy in 5 weekly fractions of 6 Gy with or without an additional boost. Elective nodal irradiation was not permitted. There were no restrictions on breast size or the use of cytotoxic chemotherapy for otherwise eligible patients. Patients were assessed at baseline, treatment completion, and at first posttreatment follow-up to assess acute toxicity (Common Terminology Criteria for Adverse Events, version 3.0) and quality of life (European Organization for Research and Treatment of Cancer QLQ-BR23). Results: Between January and September 2011, 42 eligible patients underwent weekly hypofractionated breast irradiation immediately following BCS (69.0%) or at the conclusion of cytotoxic chemotherapy (31.0%). The rates of grade ?2 radiation-induced dermatitis, pain, fatigue, and breast edema were 19.0%, 11.9%, 9.5%, and 2.4%, respectively. Only 1 grade 3 toxicity—pain requiring a course of narcotic analgesics—was observed. One patient developed a superficial cellulitis (grade 2), which resolved with the use of oral antibiotics. Patient-reported moderate-to-major breast symptoms (pain, swelling, and skin problems), all decreased from baseline through 1 month, whereas breast sensitivity remained stable over the study period. Conclusions: The tolerance of weekly hypofractionated breast irradiation compares well with recent reports of daily hypofractionated whole-breast irradiation schedules. The regimen appears feasible and cost-effective. Additional follow-up with continued accrual is needed to assess late toxicity, cosmesis, and disease-specific outcomes.

  13. Defective fuel rod detection in operating pressurized water reactors during periods of continuously decreasing fuel rod integrity levels

    SciTech Connect (OSTI)

    Zanker, H. )

    1989-09-01

    Periods of continuously decreasing levels of fuel rod integrity due to debris-induced cladding damage, vibration-induced fretting wear of the cladding, etc. cause difficulties in the assessment of fuel rod performance from coolant activity data. The calculational models currently in use for this purpose in nuclear power plants are not sufficiently capable of indicating cases in which they are invalid. This can mislead reactor operators by misinterpretation of the coolant activity data, especially in situations where fast reactions are necessary. A quick test of validity is suggested to check the applicability of the currently available calculational models for estimating the number and average size of fuel rod defects. This paper describes how to recognize immediately periods of continuously decreasing levels of fuel rod integrity in order to prevent complications in routine power plant maintenance as well as accident situations caused by more severe fuel rod degradation.

  14. PULSATION PERIOD VARIATIONS IN THE RRc LYRAE STAR KIC 5520878

    SciTech Connect (OSTI)

    Hippke, Michael; Learned, John G.; Zee, A.; Edmondson, William H.; Lindner, John F.; Kia, Behnam; Ditto, William L.; Stevens, Ian R. E-mail: jgl@phys.hawaii.edu E-mail: w.h.edmondson@bham.ac.uk E-mail: wditto@hawaii.edu E-mail: irs@star.sr.bham.ac.uk

    2015-01-01

    Learned et al. proposed that a sufficiently advanced extra-terrestrial civilization may tickle Cepheid and RR Lyrae variable stars with a neutrino beam at the right time, thus causing them to trigger early and jogging the otherwise very regular phase of their expansion and contraction. This would turn these stars into beacons to transmit information throughout the galaxy and beyond. The idea is to search for signs of phase modulation (in the regime of short pulse duration) and patterns, which could be indicative of intentional, omnidirectional signaling. We have performed such a search among variable stars using photometric data from the Kepler space telescope. In the RRc Lyrae star KIC 5520878, we have found two such regimes of long and short pulse durations. The sequence of period lengths, expressed as time series data, is strongly autocorrelated, with correlation coefficients of prime numbers being significantly higher (p = 99.8%). Our analysis of this candidate star shows that the prime number oddity originates from two simultaneous pulsation periods and is likely of natural origin. Simple physical models elucidate the frequency content and asymmetries of the KIC 5520878 light curve. Despite this SETI null result, we encourage testing of other archival and future time-series photometry for signs of modulated stars. This can be done as a by-product to the standard analysis, and can even be partly automated.

  15. Periodicity of the solar full-disk magnetic fields

    SciTech Connect (OSTI)

    Xiang, N. B.; Qu, Z. N.; Zhai, Q. [National Astronomical Observatories/Yunnan Observatory, CAS, Kunming 650011 (China)

    2014-07-01

    A full-disk solar magnetogram has been measured each day since 1970 January 19, and the daily Magnetic Plage Strength Index (MPSI) and the daily Mount Wilson Sunspot Index (MWSI) were calculated for each magnetogram at the Mount Wilson Observatory. The MPSI and MWSI are used to investigate the periodicity of the solar full-disk magnetic activity through autocorrelation analyses. Just two periods, the solar cycle and the rotation cycle, are determined in both the MPSI (the solar full-disk weak magnetic field activity) and MWSI (the solar full-disk strong magnetic field activity) with no annual signal found. The solar cycle for MPSI (10.83 yr) is found to be obviously longer than that for MWSI (9.77 yr). The rotation cycle is determined to be 26.8 ± 0.63 sidereal days for MPSI and 27.4 ± 2.4 sidereal days for MWSI. The rotation cycle length for MPSI is found to fluctuate around 27 days within a very small amplitude, but for MWSI it obviously temporally varies with a rather large amplitude. The rotation cycle for MWSI seems longer near solar minimum than at solar maximum. Cross-correlation analyses of daily MPSI and MWSI are carried out, and it is inferred that the MPSI components partly come from relatively early MWSI measurements.

  16. Ferromagnetism in the two-dimensional periodic Anderson model

    SciTech Connect (OSTI)

    Batista, C. D.; Bonca, J.; Gubernatis, J. E.

    2001-05-01

    Using the constrained-path Monte Carlo method, we studied the magnetic properties of the two-dimensional periodic Anderson model for electron fillings between 1/4 and 1/2. We also derived two effective low-energy theories to assist in interpreting the numerical results. For 1/4 filling, we found that the system can be a Mott or a charge-transfer insulator, depending on the relative values of the Coulomb interaction and the charge-transfer gap between the two noninteracting bands. The insulator may be a paramagnet or antiferromagnet. We concentrated on the effect of electron doping on these insulating phases. Upon doping we obtained a partially saturated ferromagnetic phase for low concentrations of conduction electrons. If the system were a charge-transfer insulator, we would find that the ferromagnetism is induced by the well-known Ruderman-Kittel-Kasuya-Yosida interaction. However, we found a novel correlated hopping mechanism inducing the ferromagnetism in the region where the nondoped system is a Mott insulator. Our regions of ferromagnetism spanned a much smaller doping range than suggested by recent slave boson and dynamical mean-field theory calculations, but they were consistent with that obtained by density-matrix renormalization group calculations of the one-dimensional periodic Anderson model.

  17. Randomised controlled trial of the efficacy of aerobic exercise in reducing metabolic risk in healthy older people: The Hertfordshire Physical Activity Trial

    E-Print Network [OSTI]

    Finucane, Francis M.; Horton, Jessica; Purslow, Lisa R.; Savage, David B.; Brage, Søren; Besson, Herve; Horton, Kenneth; De Lucia Rolfe, Ema; Sleigh, Alison; Sharp, Stephen J.; Martin, Helen; Ahie Sayer, Avan; Cooper, Cyrus; Ekelund, Ulf; Griffin, Simon J.; Wareham, Nicholas J.

    2009-06-19

    affects the rela- tionship between muscle function and physical activity remains unknown. Methods/Design Study design This is a single centre, explanatory randomized controlled trial of the efficacy of a fully supervised twelve-week aero- bic exercise... five com- ponents of basic motor function in older people, namely dominant arm grip strength, time taken to rise from a chair and walk a short distance, repeated chair rises, cus- tomary walking speed and balance [55-57]. A sub-maxi- mal exercise test...

  18. Supersonic turbulent boundary layers with periodic mechanical non-equilibrium 

    E-Print Network [OSTI]

    Ekoto, Isaac Wesley

    2007-04-25

    is essential. Turbulence reduction has applications for reentry vehicles. On their undersurface they have a heat shield that is composed of uniformly shaped materials (e.g. tiles, ablative materiel, etc.). Shape selection that can reduce turbulent heat... of the literature reveals roughness elements with sharp leading edges have not been explored. Much could be revealed by an investigation into a these type of roughness elements. The thought is that the blunt shaped roughness elements used in the past (e.g. square...

  19. Energy Conservation Program for Consumer Products: Test Procedures for Furnaces and Boilers, Comment Period Extension

    Broader source: Energy.gov [DOE]

    Energy Conservation Program for Consumer Products: Test Procedures for Furnaces and Boilers, Comment Period Extension

  20. Variable Selection and Inference for Multi-period Forecasting Problems

    E-Print Network [OSTI]

    Pesaran, M Hashem; Pick, Andreas; Timmermann, Allan

    ?t,x?t)?. Multi-period forecasts of yt can then be obtained iteratively using a conventional VAR of the form zt = µz + ( Ap(L) Bq(L) Cr(L) Ds(L) ) zt?1 + ?t, (10) where p and q are the lag order of yt and xt in the equation for yt and r and s is the lag order... , i.e. Cr(L) and Bq(L) in particular. To deal with this issue, a conditional factor-augmentation approach can be used. In this approach, the large-dimensional xt-vector is condensed into a subset of factors, fˆ t, of dimension m < M , used to summarize...

  1. Transverse commensurability effect for vortices on periodic pinning arrays

    SciTech Connect (OSTI)

    Reichhardt, Charles; Reichhardt, Cynthia J

    2008-01-01

    Using computer simulations, we demonstrate a type of commensurability that occurs for vortices moving longitudinally through periodic pinning arrays in the presence of an additional transverse driving force. As a function of vortex density, there is a series of broad maxima in the transverse critical depinning force that do not fall at the matching fields where the number of vortices equals an integer multiple of the number of pinning sites. The commensurability effects are associated with dynamical states in which evenly spaced structures consisting of one or more moving rows of vortices form between rows of pinning sites. Remarkably, the critical transverse depinning force can be more than an order of magnitude larger than the longitudinal depinning force.

  2. Chaotic dynamics in a periodically driven spin-1 condensate

    SciTech Connect (OSTI)

    Cheng Jing [Department of Physics, South China University of Technology, Guangzhou 510640 (China); Kavli Institute for Theoretical Physics China, CAS, Beijing 100190 (China)

    2010-02-15

    We use periodically modulated magnetic fields to drive spin-1 Bose-Einstein condensates (BECs) and study the corresponding spin-mixing dynamics. Due to the time-dependent driving, this system permits chaotic dynamics depending on the drive parameters, which could not occur in previous studies. From the investigation of the Poincare sections, we find there exist complex trajectories in the phase space, leading to very complicated structures of the phase space with mixed regular and chaotic regions. By calculating the quasienergy levels of the corresponding Floquet operators, the signatures of quantum chaos are also found in this system. The level spacing distribution is very close to the Poisson distribution or Wigner distribution when the corresponding classical dynamics is regular or chaotic.

  3. Experimental evidence of planar channeling in a periodically bent crystal

    E-Print Network [OSTI]

    Bagli, E; Bellucci, V; Berra, E; Camattari, R; De Salvador, D; Germogli, G; Guidi, V; Lanzoni, L; Lietti, D; Mazzolari, A; Prest, M; Tikhomirov, V V; Vallazza, E

    2014-01-01

    The usage of a Crystalline Undulator (CU) has been identified as a promising solution for generating powerful and monochromatic $\\gamma$-rays. A CU was fabricated at SSL through the grooving method, i.e., by the manufacturing of a series of periodical grooves on the major surfaces of a crystal. The CU was extensively characterized both morphologically via optical interferometry at SSL and structurally via X-ray diffraction at ESRF. Then, it was finally tested for channeling with a 400 GeV/c proton beam at CERN. The experimental results were compared to Monte Carlo simulations. Evidence of planar channeling in the CU was firmly observed. Finally, the emission spectrum of the positron beam interacting with the CU was simulated for possible usage in currently existing facilities.

  4. Quasi-periodic oscillations from relativistic hydrodynamical slender tori

    E-Print Network [OSTI]

    Mishra, B; Manousakis, A; Fragile, P C; Paumard, T; Klu?niak, W

    2015-01-01

    We simulate an oscillating purely hydrodynamical torus with constant specific angular mo- mentum around a Schwarzschild black hole. The goal is to search for quasi-periodic oscil- lations (QPOs) in the light curve of the torus. The initial torus setup is subjected to radial, vertical and diagonal (combination of radial and vertical) velocity perturbations. The hydro- dynamical simulations are performed using the general relativistic magnetohydrodynamics code Cosmos++ and ray-traced using the GYOTO code. We found that a horizontal velocity perturbation triggers the radial and plus modes, while a vertical velocity perturbation trig- gers the vertical and X modes. The diagonal perturbation gives a combination of the modes triggered in the radial and vertical perturbations.

  5. Instrumentation to Monitor Transient Developing Periodic Flow in Newtonian Slurries

    SciTech Connect (OSTI)

    Bamberger, Judith A.; Enderlin, Carl W.

    2014-08-03

    This paper describes measurement techniques developed and applied to characterize solids mobilization and mixing of Newtonian slurries that are subjected to transient, periodic, developing flows. Metrics to characterize mobilization and mixing are the just suspended velocity (UJS) and the cloud height (HC). Two ultrasonic instruments to characterize pulse jet mixing of slurries were developed and deployed to measure related metrics: the thickness of the settled bed (used to determine mobilization) and the concentration within the cloud as a function of elevation [C(Z)]. A second method, continuous sample extraction, characterization, and reinsertion was successfully used to measure average density and characterize the concentration within the cloud. Testing focused on mixing vessels using intermitent jet mixers oriented vertically downward. Descriptions of the instruments and instrument performance are presented. These techniques were an effective approach to characterize mixing phenomena, determine mixing energy required to fully mobilize vessel contents, and to determine mixing times for process evaluation.

  6. IUPAC Periodic Table of Isotopes for the Educational Community

    SciTech Connect (OSTI)

    Holden N. E.; Holden,N.E.; Coplen,T.B.

    2012-07-15

    John Dalton first proposed the concept of atomic weights of the elements in the first decade of the nineteenth century. These atomic weights of the chemical elements were thought of as constants of nature, similar to the speed of light. Dmitri Mendeleev arranged the atomic weights of the elements in ascending order of value and used the systematic variation of their chemical properties to produce his Periodic Table of the Elements in 1869. Measurement of atomic weight values became an important chemical activity for a century and a half. Theodore Richards received a Noble Prize for his work in this area. In 1913, Fredrick Soddy found a species of radium, which had an atomic weight value of 228, compared to the familiar radium gas value of 226. Soddy coined the term 'isotope' (Greek for 'in the same place') to account for this second atomic weight value in the radium position of the Periodic Table. Both of these isotopes of radium are radioactive. Radioactive isotopes are energetically unstable and will decay (disintegrate) over time. The time it takes for one half of a sample of a given radioactive isotope to decay is the half-life of that isotope. In addition to having different atomic weight values, radium-226 and radium-228 also have different half-life values. Around the same time as Soddy's work, J.J. Thomson (discoverer of the electron) identified two stable (non-radioactive) isotopes of the same element, neon. Over the next 40 years, the majority of the known chemical elements were found to have two or more stable (or long-lived radioactive isotopes that contribute significantly to the determination of the atomic weights of the elements).

  7. In-line Mach-Zehnder interferometer composed of microtaper and long-period grating in all-solid photonic bandgap fiber

    SciTech Connect (OSTI)

    Wu Zhifang; Liu Yange; Wang Zhi; Han Tingting; Li Shuo; Jiang Meng; Ping Shum, Perry

    2012-10-01

    We report a compact in-line Mach-Zehnder interferometer combining a microtaper with a long-period grating (LPG) in a section of all-solid photonic bandgap fiber. Theoretical and experimental investigations reveal that the interferometer works from the interference between the fundamental core mode and the LP{sub 01} cladding supermodes. The mechanism underlying the mode coupling caused by the microtaper can be attributed to a bandgap-shifting as the fiber diameter is abruptly scaled down. In addition, the interferometer designed to strengthen the coupling ratio of the long-period grating has a promising practical application in the simultaneous measurement of curvature and temperature.

  8. Reseeding trials with seedhay material of little bluestem in western Williamson County, Texas 

    E-Print Network [OSTI]

    Yarlett, Lewis L

    1954-01-01

    ~ 79 . 47 ?-49 5. 75 4. 36 15. 75 2 43 2. 82 13 59 21?95 11?01 4. 48 2?($ 1?57 87 . 64 ~ 77 41 98 60 05 Totals 100?00 100?00 100 00 100 00 100. 00 100?00 100. 00 100?00 Ground Caver ?795$ 1 03$ 1. 10$ 857$ . 615~ ~~ 795 ?61?g , 976...RESEEDVfG TRIALS %ITH SEEDBAT MATmIIAL GF LITTLE BLUESTEM IB WEBBED &'ILLIAMSON COUHTT~ TEKAS A Thesis Ll?IS L, TARLETT Approved as to style and ernest bus MAXp 19+ LIB RARY l A N COLLEGE OF IEXAS ESSEEDIEG TRIALS WITH SjmHAY MATINIAL...

  9. Antiplatelet treatment compared with anticoagulation treatment for cervical artery dissection (CADISS): a randomised trial

    E-Print Network [OSTI]

    The CADISS trial investigators

    2015-02-12

    this randomised open-label parallel randomised trial at hospitals with specialised stroke or neurology services in the UK (n=39) and Australia (n=7). The full study protocol has been previously published.12 We enrolled patients from inpatient or outpatient... Hospital, Kent and Canterbury Hospital, Canterbury (3; Isle Burger), King’s College Hospital, London (9; Lalit Kalra), Leeds General Hospital, Leeds (6; Ahamed Hassan), Musgrove Park Hospital, Taunton (1; Christopher Price), Newcastle Hospitals NHS...

  10. Difluoromethylornithine plus sulindac for the prevention of sporadic colorectal adenomas: a randomized placebo-controlled, double-blind trial.

    E-Print Network [OSTI]

    2008-01-01

    Eagle CJ, Spicak J, et al. Celecoxib for the prevention ofEagle CJ, Zauber AG, et al. Celecoxib for the prevention ofrisk associated with celecoxib in a clinical trial for

  11. Vitamin E and the risk of prostate cancer: Updated results of the Selenium and Vitamin E Cancer Prevention Trial (SELECT)

    E-Print Network [OSTI]

    2012-01-01

    10.1001/jama.2011.1437. Vitamin E and the Risk of Prostateof The Selenium and Vitamin E Cancer Prevention Trial (Effect of Selenium and Vitamin E on Risk of Prostate Cancer

  12. Field Trial of a Low-Cost, Distributed Plug Load Monitoring System

    SciTech Connect (OSTI)

    Auchter, B.; Cautley, D.; Ahl, D.; Earle, L.; Jin, X.

    2014-03-01

    Researchers have struggled to inventory and characterize the energy use profiles of the ever-growing category of so-called miscellaneous electric loads (MELs) because plug-load monitoring is cost-prohibitive to the researcher and intrusive to the homeowner. However, these data represent a crucial missing link to our understanding of how homes use energy, and we cannot control what we do not understand. Detailed energy use profiles would enable the nascent automated home energy management (AHEM) industry to develop effective control algorithms that target consumer electronics and other plug loads. If utility and other efficiency programs are to incent AHEM devices, they need large-scale datasets that provide statistically meaningful justification of their investments by quantifying the aggregate energy savings achievable. To address this need, we have investigated a variety of plug-load measuring devices available commercially and tested them in the laboratory to identify the most promising candidates for field applications. The scope of this report centers around the lessons learned from a field validation of one proof-of-concept system, called Smartenit (formerly SimpleHomeNet). The system was evaluated based on the rate of successful data queries, reliability over a period of days to weeks, and accuracy. This system offers good overall performance when deployed with up to ten end nodes in a residential environment, although deployment with more nodes and in a commercial environment is much less robust. We conclude that the current system is useful in selected field research projects, with the recommendation that system behavior is observed over time.

  13. Nonlinear Dynamics, Magnitude-Period Formula and Forecasts on Earthquake

    E-Print Network [OSTI]

    Yi-Fang Chang

    2008-02-02

    Based on the geodynamics, an earthquake does not take place until the momentum-energy excess a faulting threshold value of rock due to the movement of the fluid layer under the rock layer and the transport and accumulation of the momentum. From the nonlinear equations of fluid mechanics, a simplified nonlinear solution of momentum corresponding the accumulation of the energy could be derived. Otherwise, a chaos equation could be obtained, in which chaos corresponds to the earthquake, which shows complexity on seismology, and impossibility of exact prediction of earthquakes. But, combining the Carlson-Langer model and the Gutenberg-Richter relation, the magnitude-period formula of the earthquake may be derived approximately, and some results can be calculated quantitatively. For example, we forecast a series of earthquakes of 2004, 2009 and 2014, especially in 2019 in California. Combining the Lorenz model, we discuss the earthquake migration to and fro. Moreover, many external causes for earthquake are merely the initial conditions of this nonlinear system.

  14. Lithospheric Thickness Modeled from Long Period Surface Wave Dispersion

    SciTech Connect (OSTI)

    Pasyanos, M E

    2008-05-15

    The behavior of surface waves at long periods is indicative of subcrustal velocity structure. Using recently published dispersion models, we invert surface wave group velocities for lithospheric structure, including lithospheric thickness, over much of the Eastern Hemisphere, encompassing Eurasia, Africa, and the Indian Ocean. Thicker lithosphere under Precambrian shields and platforms are clearly observed, not only under the large cratons (West Africa, Congo, Baltic, Russia, Siberia, India), but also under smaller blocks like the Tarim Basin and Yangtze craton. In contrast, it is found that remobilized Precambrian structures like the Saharan Shield and Sino-Korean Paraplatform do not have well-established lithospheric keels. The thinnest lithospheric thickness is found under oceanic and continental rifts, as well as along convergence zones. We compare our results to thermal models of continental lithosphere, lithospheric cooling models of oceanic lithosphere, lithosphere-asthenosphere boundary (LAB) estimates from S-wave receiver functions, and velocity variations of global tomography models. In addition to comparing results for the broad region, we examine in detail the regions of Central Africa, Siberia, and Tibet. While there are clear differences in the various estimates, overall the results are generally consistent. Inconsistencies between the estimates may be due to a variety of reasons including lateral and depth resolution differences and the comparison of what may be different lithospheric features.

  15. Periodically-driven quantum matter: the case of resonant modulations

    E-Print Network [OSTI]

    N. Goldman; J. Dalibard; M. Aidelsburger; N. R. Cooper

    2015-03-06

    Quantum systems can show qualitatively new forms of behavior when they are driven by fast time-periodic modulations. In the limit of large driving frequency, the long-time dynamics of such systems can often be described by a time-independent effective Hamiltonian, which is generally identified through a perturbative treatment. Here, we present a general formalism that describes time-modulated physical systems, in which the driving frequency is large, but resonant with respect to energy spacings inherent to the system at rest. Such a situation is currently exploited in optical-lattice setups, where superlattice (or Wannier-Stark-ladder) potentials are resonantly modulated so as to control the tunneling matrix elements between lattice sites, offering a powerful method to generate artificial fluxes for cold-atom systems. The formalism developed in this work identifies the basic ingredients needed to generate interesting flux patterns and band structures using resonant modulations. Additionally, our approach allows for a simple description of the micro-motion underlying the dynamics; we illustrate its characteristics based on diverse dynamic-lattice configurations. It is shown that the impact of the micro-motion on physical observables strongly depends on the implemented scheme, suggesting that a theoretical description in terms of the effective Hamiltonian alone is generally not sufficient to capture the full time-evolution of the system.

  16. Physics division. Progress report for period ending September 30, 1996

    SciTech Connect (OSTI)

    Ball, S.J. [ed.

    1997-04-01

    This report covers the research and development activities of the Physics Division for the 1995 and 1996 fiscal years, beginning October 1, 1994, and ending September 30, 1996. The activities of the Division continue to be concentrated in the areas of experimental nuclear physics, experimental atomic physics, and theoretical nuclear and atomic physics. In addition, there are smaller programs in plasma diagnostics and data compilation and evaluation. During the period of this report, there has been considerable success in bringing the Holifield Radioactive Ion Beam Facility (HRIBF) into routine operation. The budgets of the nuclear physics portion of the Division have increased each year in nearly all areas, and several new members have been added to the Division research and development staff. On August 30, 1996, the HRIBF successfully accelerated its first radioactive ion beams, {sup 69}As and {sup 70}As. Prior to this, the heart of the facility, the RIB injector system, was completed, including installation of a remote handling system for the target/ion source assembly. Target and ion source development is likely to be the technical key to success of the HRIBF. We have expanded our efforts in those development areas. Of special note is the development of highly permeable composite targets which have now been shown to allow release of difficult-to-produce radioactive ions such as {sup 17,18}F. A summary of the HRIBF work is provided in Chapter 1, along with supporting activities of the Joint Institute for Heavy Ion Research.

  17. Periodic Accretion Instabilities in the Protostar L1634 IRS 7

    E-Print Network [OSTI]

    Hodapp, Klaus W

    2015-01-01

    The small molecular cloud Lynds 1634 contains at least three outflow sources. We found one of these, IRS 7, to be variable with a period of 37.14 +/- 0.04 days and an amplitude of approximately 2 mag in the Ks band. The light curve consists of a quiescent phase with little or no variation, and a rapid outburst phase. During the outburst phase, the rapid brightness variation generates light echoes that propagate into the surrounding molecular cloud, allowing a measurement of the distance to IRS 7 of 404 pc +/- 35 pc. We observed only a marginally significant change in the H - K color during the outburst phase. The K-band spectrum of IRS 7 shows CO bandhead emission but its equivalent width does not change significantly with the phase of the light curve. The H_2 1-0 S(1) line emission does not follow the variability of the continuum flux. We also used the imaging data for a proper motion study of the outflows originating from the IRS 7 and the FIR source IRAS 05173-0555, and confirm that these are indeed distin...

  18. THE DECAYING LONG-PERIOD OSCILLATION OF A STELLAR MEGAFLARE

    SciTech Connect (OSTI)

    Anfinogentov, S.; Nakariakov, V. M.; Mathioudakis, M.; Van Doorsselaere, T.; Kowalski, A. F.

    2013-08-20

    We analyze and interpret the oscillatory signal in the decay phase of the U-band light curve of a stellar megaflare observed on 2009 January 16 on the dM4.5e star YZ CMi. The oscillation is well approximated by an exponentially decaying harmonic function. The period of the oscillation is found to be 32 minutes, the decay time about 46 minutes, and the relative amplitude 15%. As this observational signature is typical of the longitudinal oscillations observed in solar flares at extreme ultraviolet and radio wavelengths, associated with standing slow magnetoacoustic waves, we suggest that this megaflare may be of a similar nature. In this scenario, macroscopic variations of the plasma parameters in the oscillations modulate the ejection of non-thermal electrons. The phase speed of the longitudinal (slow magnetoacoustic) waves in the flaring loop or arcade, the tube speed, of about 230 km s{sup -1} would require a loop length of about 200 Mm. Other mechanisms, such as standing kink oscillations, are also considered.

  19. A renewal theory approach to periodic copolymers with adsorption

    E-Print Network [OSTI]

    Francesco Caravenna; Giambattista Giacomin; Lorenzo Zambotti

    2007-10-24

    We consider a general model of a heterogeneous polymer chain fluctuating in the proximity of an interface between two selective solvents. The heterogeneous character of the model comes from the fact that the monomer units interact with the solvents and with the interface according to some charges that they carry. The charges repeat themselves along the chain in a periodic fashion. The main question concerning this model is whether the polymer remains tightly close to the interface, a phenomenon called localization, or whether there is a marked preference for one of the two solvents, thus yielding a delocalization phenomenon. In this paper, we present an approach that yields sharp estimates for the partition function of the model in all regimes (localized, delocalized and critical). This, in turn, makes possible a precise pathwise description of the polymer measure, obtaining the full scaling limits of the model. A key point is the closeness of the polymer measure to suitable Markov renewal processes, Markov renewal theory being one of the central mathematical tools of our analysis.

  20. THE OPTICAL GRAVITATIONAL LENSING EXPERIMENT. THE CATALOG OF PERIODIC VARIABLE STARS IN THE GALACTIC BULGE. I. PERIODIC VARIABLES IN THE CENTER OF THE BAADE'S WINDOW.

    E-Print Network [OSTI]

    A. UDALSKI; M. KUBIAK; M. SZYMANSKI; J. KALUZNY; M. MATEO; W. KRZEMINSKI

    1995-01-09

    This paper is the first part of the Catalog of Periodic Variable Stars in the Galactic bulge. The Catalog is based on observations collected during the OGLE microlensing search. 213 periodic variable stars brighter than I=18 mag: 31 pulsating, 116 eclipsing and 66 miscellaneous type variables from the Baade's Window BWC field are presented. Periodic variable stars from remaining 20 fields will be presented in similar form in the next parts of the Catalog. The Catalog as well as observations of all periodic variable objects are available to astronomical community over the Internet network.

  1. Natural Gas Applications

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    Gas Applications. If you need assistance viewing this page, please call (202) 586-8800. Energy Information Administration Home Page Home > Natural Gas > Natural Gas Applications...

  2. Physics Division progress report for period ending September 30, 1985

    SciTech Connect (OSTI)

    Livingston, A.B. (ed.)

    1986-04-01

    This report covers the research and development activities of the Physics Division for the 1985 fiscal year. The research activities were centered on experimental nuclear physics, experimental atomic physics, and theoretical nuclear and atomic physics. The experimental nuclear physics program is dominated by heavy ion research. A major part of this effort is the responsibility for operating the Holifield Heavy Ion Research Facility as a national user facility. A major new activity described is the preparation for participation in an ultrarelativistic heavy ion experiment to be performed at CERN in 1986. The experimental atomic physics program has two components: the accelerator-based studies of basic collisional phenomena and the studies in support of the controlled fusion program. Also associated with the fusion-related studies are a plasma diagnostics program and the operation of an atomic physics data center. Theory efforts associated with the UNISOR program are described, as well as smaller programs in applications and high-energy physics. (LEW)

  3. Annual site environmental report, period: January 1994 to June 1995

    SciTech Connect (OSTI)

    NONE

    1996-01-01

    The environmental management program at the US Department of Energy (DOE), Morgantown Energy Technology Center (METC), addresses all areas of environmental concern, including surface water and groundwater quality, air quality, and solid and hazardous waste disposal. The program focuses primarily on the treatment and disposal of industrial, contaminated, and sanitary wastewaters; the disposal of solid and hazardous wastes; minimizing air pollutant emissions; the monitoring of surface water, groundwater, and air quality on the METC site and in the surrounding area; the decommissioning, decontamination, and disposal of on-site research facilities no longer in use; and the identification, characterization, and cleanup of off-site property where METC sponsored research and development activities. The environmental management program is conducted to meet the requirements of all applicable Federal, state, and local laws and regulations.

  4. Unit 51 - GIS Application Areas

    E-Print Network [OSTI]

    Unit 51, CC in GIS; Cowen, David; Ferguson, Warren

    1990-01-01

    51 - GIS APPLICATION AREAS UNIT 51 - GIS APPLICATION AREAS1990 Page 1 Unit 51 - GIS Application Areas Computers inyour students. UNIT 51 - GIS APPLICATION AREAS Compiled with

  5. EIS-0388: Extension of Scoping Period for the Notice of Intent...

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

    Extension of Scoping Period for the Notice of Intent to Prepare an Environmental Impact Statement EIS-0388: Extension of Scoping Period for the Notice of Intent to Prepare an...

  6. EIS-0380: Notice to Extend Comment Period on the Draft Site-Wide...

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

    to Extend Comment Period on the Draft Site-Wide Environmental Impact Statement EIS-0380: Notice to Extend Comment Period on the Draft Site-Wide Environmental Impact Statement...

  7. The effect of periodic-unsteady wakes, curvature, and pressure gradient on boundary-layer transition 

    E-Print Network [OSTI]

    Radke, Robert Edward

    1994-01-01

    periodic-unsteady wakes. In addition, a turbomachinery cascade test facility with periodic-unsteady inlet flow was designed and manufactured for the next generation of research in this area....

  8. Taxonomy of periodic nets and the design of materials Olaf Delgado-Friedrichs,a

    E-Print Network [OSTI]

    Yaghi, Omar M.

    Taxonomy of periodic nets and the design of materials Olaf Delgado-Friedrichs,a Michael O classification (taxonomy) of polyhedra and periodic nets that is appropriate for identifying the structures

  9. Lyapunov instability for a periodic Lorentz gas thermostated by deterministic scattering K. Rateitschak*

    E-Print Network [OSTI]

    Klages, Rainer

    Lyapunov instability for a periodic Lorentz gas thermostated by deterministic scattering K assess the nonlinear properties of this dynamical system by numerically calculating its Lyapunov exponents. Based on a revised method for computing Lyapunov exponents, which employs periodic

  10. A New Methodology for Frequency Domain Analysis of Wave Energy Converters with Periodically Varying Physical Parameters

    E-Print Network [OSTI]

    Victoria, University of

    A New Methodology for Frequency Domain Analysis of Wave Energy Converters with Periodically Varying Methodology for Frequency Domain Analysis of Wave Energy Converters with Periodically Varying Physical of Mechanical Engineering) ABSTRACT Within a wave energy converter's operational bandwidth, device operation

  11. Outburst-related period changes of recurrent nova CI aquilae

    SciTech Connect (OSTI)

    Wilson, R. E.; Honeycutt, R. K., E-mail: honey@astro.indiana.edu, E-mail: rewilson@ufl.edu [Astronomy Department, Indiana University, Swain Hall West, Bloomington, IN 47405 (United States)

    2014-11-01

    Pre-outburst and post-outburst light curves and post-outburst eclipse timings are analyzed to measure any period (P) change related to nova CI Aql's outburst of early 2000 and a mean post-outburst dP/dt, which then lead to estimates of the accreting component's rate of mass (M) change and its overall outburst-related change of mass over roughly a decade of observations. We apply a recently developed procedure for unified analysis of three timing-related data types (light curves, radial velocities, and eclipse timings), although with only light curves and timings in this case. Fits to the data are reasonably good without need for a disk in the light-curve model, although the disk certainly exists and has an important role in our post-outburst mass flow computations. Initial experiments showed that, although there seems to be an accretion hot spot, it has essentially no effect on derived outburst-related ?P or on post-outburst dP/dt. Use of atomic time (HJED) in place of HJD also has essentially nil effect on ?P and dP/dt. We find ?P consistently negative in various types of solutions, although at best only marginally significant statistically in any one experiment. Pre-outburst HJD {sub 0} and P results are given, as are post-outburst HJD {sub 0}, P, and dP/dt, with light curves and eclipse times as joint input, and also with only eclipse time input. Post-outburst dP/dt is negative at about 2.4?. Explicit formulae for mass transfer rates and epoch-to-epoch mass change are developed and applied. A known offset in the magnitude zero point for 1991-1994 is corrected.

  12. Steady-State Electrical Conduction in the Periodic Lorentz Gas

    E-Print Network [OSTI]

    N. I. Chernov; G. L. Eyink; J. L. Lebowitz; Ya. G. Sinai

    1993-02-08

    We study nonequilibrium steady states in the Lorentz gas of periodic scatterers when an external field is applied and the particle kinetic energy is held fixed by a ``thermostat'' constructed according to Gauss' principle of least constraint (a model problem previously studied numerically by Moran and Hoover). The resulting dynamics is reversible and deterministic, but does not preserve Liouville measure. For a sufficiently small field, we prove the following results: (1) existence of a unique stationary, ergodic measure obtained by forward evolution of initial absolutely continuous distributions, for which the Pesin entropy formula and Young's expression for the fractal dimension are valid; (2) exact identity of the steady-state thermodyamic entropy production, the asymptotic decay of the Gibbs entropy for the time-evolved distribution, and minus the sum of the Lyapunov exponents; (3) an explicit expression for the full nonlinear current response (Kawasaki formula); and (4) validity of linear response theory and Ohm's transport law, including the Einstein relation between conductivity and diffusion matrices. Results (2) and (4) yield also a direct relation between Lyapunov exponents and zero-field transport (=diffusion) coefficients. Although we restrict ourselves here to dimension $d=2,$ the results carry over to higher dimensions and to some other physical situations: e.g. with additional external magnetic fields. The proofs use a well-developed theory of small perturbations of hyperbolic dynamical systems and the method of Markov sieves, an approximation of Markov partitions. In our context we discuss also the van Kampen objection to linear response theory, which, we point out, overlooks the ``structural stability'' of strongly hyperbolic flows.

  13. Divergence of the Chaotic Layer Width and Strong Acceleration of the Spatial Chaotic Transport in Periodic Systems Driven by an Adiabatic ac Force

    E-Print Network [OSTI]

    S. M. Soskin; O. M. Yevtushenko; R. Mannella

    2005-10-12

    We show for the first time that a {\\it weak} perturbation in a Hamiltonian system may lead to an arbitrarily {\\it wide} chaotic layer and {\\it fast} chaotic transport. This {\\it generic} effect occurs in any spatially periodic Hamiltonian system subject to a sufficiently slow ac force. We explain it and develop an explicit theory for the layer width, verified in simulations. Chaotic spatial transport as well as applications to the diffusion of particles on surfaces, threshold devices and others are discussed.

  14. DIRECT ENERGY CONVERSION FISSION REACTOR FOR THE PERIOD JUNE 1, 2001 THROUGH SEPTEMBER 30, 2001

    SciTech Connect (OSTI)

    L.C. BROWN

    2001-09-30

    OAK-B135 DIRECT ENERGY CONVERSION FISSION REACTOR FOR THE PERIOD JUNE 1, 2001 THROUGH SEPTEMBER 30, 2001

  15. High-energy channeling and its applications. Progress report for period May 1, 1981-December 1, 1981

    SciTech Connect (OSTI)

    Gibson, W.M.; Sun, C.R.

    1981-12-01

    Progress is reported in these areas; proton channeling through bent crystals at GeV energies; gamma radiation from 10 GeV positrons channeled in silicon monocrystal; and other publications during the year reported. (GHT)

  16. Preparations, properties, and applications of periodic nano arrays using anodized aluminum oxide and di-block copolymer

    E-Print Network [OSTI]

    Noh, Kunbae

    2011-01-01

    M.M. , Thin anodic oxide layers on aluminum and other valvethat forms continuous oxide layer over the whole anodizedbut more uniform oxide layer forms. To reduce Joule heating

  17. Preparations, properties, and applications of periodic nano arrays using anodized aluminum oxide and di-block copolymer

    E-Print Network [OSTI]

    Noh, Kunbae

    2011-01-01

    alumina nanotubes by atomic layer deposition. Nano Letters,example, by using atomic layer deposition of aluminum oxidedeposition or atomic layer deposition, for various other

  18. Application of the genetic algorithm for global scheduling and a single machine scheduling problem with periodic maintenance and semiresumable jobs 

    E-Print Network [OSTI]

    Graves, Gregory Howard

    1998-01-01

    is arranged as shown in Figure l. As the production levels for the company increase, the need for efficient scheduling of this shop becomes more evident. 2 3 4 3 P6 7 8 9 10 11 12 13 14 16 17 18 19 15 20 1. Welding Shop 2. Automatic Saw 3. CNC...

  19. Access to the Central Laser Facility -Artemis Beam-time application for the period April October 2015

    E-Print Network [OSTI]

    flux is 1.8x109 photons/s at 30 eV and 6x107 photons/s at 60 eV. The best energy resolution is 120 me weeks access is available. Three weeks are available for EU access, provided through Laserlab Europe. The remaining energy can be used as synchronized pump/probe pulses. Any of the Artemis laser outputs can be used

  20. The transition mechanism from a symmetric single period discharge to a period-doubling discharge in atmospheric helium dielectric-barrier discharge

    SciTech Connect (OSTI)

    Zhang, Dingzong; Wang, Yanhui; Wang, Dezhen [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)] [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)

    2013-06-15

    Period-doubling and chaos phenomenon have been frequently observed in atmospheric-pressure dielectric-barrier discharges. However, how a normal single period discharge bifurcates into period-doubling state is still unclear. In this paper, by changing the driving frequency, we study numerically the transition mechanisms from a normal single period discharge to a period-doubling state using a one-dimensional self-consistent fluid model. The results show that before a discharge bifurcates into a period-doubling state, it first deviates from its normal operation and transforms into an asymmetric single period discharge mode. Then the weaker discharge in this asymmetric discharge will be enhanced gradually with increasing of the frequency until it makes the subsequent discharge weaken and results in the discharge entering a period-doubling state. In the whole transition process, the spatial distribution of the charged particle density and the electric field plays a definitive role. The conclusions are further confirmed by changing the gap width and the amplitude of the applied voltage.

  1. E ective boundary conditions for laminar ows over periodic rough boundaries

    E-Print Network [OSTI]

    Achdou, Yves

    E#27;ective boundary conditions for laminar #29;ows over periodic rough boundaries Yves Achdou #3 are proposed for a laminar #29;ow over a rough wall with periodic roughness elements. These e#27;ective is such an approach ? In this paper, we wish to answer these questions for laminar #29;ows over periodic rough walls

  2. THE EFFECT OF A REFRACTORY PERIOD ON THE POWER SPECTRUM OF NEURONAL DISCHARGE

    E-Print Network [OSTI]

    Bair, Wyeth

    produce peaks in the power spectrum near 40 Hz. Key words. neuronal spike trains, refractory periodTHE EFFECT OF A REFRACTORY PERIOD ON THE POWER SPECTRUM OF NEURONAL DISCHARGE JOEL FRANKLIN neuron refractory period and a statistically independent interval due to a stationary external process

  3. Holocene climate instability during the termination of the African Humid Period

    E-Print Network [OSTI]

    Renssen, Hans

    Holocene climate instability during the termination of the African Humid Period H. Renssen January 2003; published 25 February 2003. [1] The termination of the Holocene African Humid Period ($9. Goosse, Holocene climate instability during the termination of the African Humid Period, Geophys. Res

  4. Stirling engine application study

    SciTech Connect (OSTI)

    Teagan, W.P.; Cunningham, D.R.

    1983-03-01

    The potential for Stirling engine applications in the 0.5 to 5000 hp output range is assessed. The following are included: a market survey of potential engine applications, classification of applications, conventional engine markets and performance characteristics, status of Sterling engine systems, selection of application classes for Stirling engines, and the possible effects of technology, economic conditions, and regulatory changes. (MHR)

  5. Concurrent Stereotactic Radiosurgery and Bevacizumab in Recurrent Malignant Gliomas: A Prospective Trial

    SciTech Connect (OSTI)

    Cabrera, Alvin R. [Department of Radiation Oncology, Duke University, Durham, North Carolina (United States); Cuneo, Kyle C. [Department of Radiation Oncology, Duke University, Durham, North Carolina (United States); Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan (United States); Desjardins, Annick [Department of Surgery, Duke University, Durham, North Carolina (United States); Sampson, John H. [Department of Radiation Oncology, Duke University, Durham, North Carolina (United States); Department of Surgery, Duke University, Durham, North Carolina (United States); McSherry, Frances; Herndon, James E. [Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina (United States); Peters, Katherine B. [Department of Surgery, Duke University, Durham, North Carolina (United States); Allen, Karen [Department of Radiation Oncology, Duke University, Durham, North Carolina (United States); Hoang, Jenny K. [Department of Radiology, Duke University, Durham, North Carolina (United States); Chang, Zheng; Craciunescu, Oana [Department of Radiation Oncology, Duke University, Durham, North Carolina (United States); Vredenburgh, James J.; Friedman, Henry S. [Department of Surgery, Duke University, Durham, North Carolina (United States); Kirkpatrick, John P., E-mail: john.kirkpatrick@dm.duke.edu [Department of Radiation Oncology, Duke University, Durham, North Carolina (United States); Department of Surgery, Duke University, Durham, North Carolina (United States)

    2013-08-01

    Purpose: Virtually all patients with malignant glioma (MG) eventually recur. This study evaluates the safety of concurrent stereotactic radiosurgery (SRS) and bevacizumab (BVZ), an antiangiogenic agent, in treatment of recurrent MG. Methods and Materials: Fifteen patients with recurrent MG, treated at initial diagnosis with surgery and adjuvant radiation therapy/temozolomide and then at least 1 salvage chemotherapy regimen, were enrolled in this prospective trial. Lesions <3 cm in diameter were treated in a single fraction, whereas those 3 to 5 cm in diameter received 5 5-Gy fractions. BVZ was administered immediately before SRS and 2 weeks later. Neurocognitive testing (Mini-Mental Status Exam, Trail Making Test A/B), Functional Assessment of Cancer Therapy-Brain (FACT-Br) quality-of-life assessment, physical exam, and dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) were performed immediately before SRS and 1 week and 2 months following completion of SRS. The primary endpoint was central nervous system (CNS) toxicity. Secondary endpoints included survival, quality of life, microvascular properties as measured by DCE-MRI, steroid usage, and performance status. Results: One grade 3 (severe headache) and 2 grade 2 CNS toxicities were observed. No patients experienced grade 4 to 5 toxicity or intracranial hemorrhage. Neurocognition, quality of life, and Karnofsky performance status did not change significantly with treatment. DCE-MRI results suggest a significant decline in tumor perfusion and permeability 1 week after SRS and further decline by 2 months. Conclusions: Treatment of recurrent MG with concurrent SRS and BVZ was not associated with excessive toxicity in this prospective trial. A randomized trial of concurrent SRS/BVZ versus conventional salvage therapy is needed to establish the efficacy of this approach.

  6. Detection and discrimination of the periodicity of prime numbers by discrete Fourier transform

    E-Print Network [OSTI]

    Levente Csoka

    2015-01-27

    A novel representation of a quasi-periodic modified von Mangoldt function L(n) on prime numbers and its decomposition into Fourier series has been investigated. We focus on some particular quantities characterizing the modified von Mangoldt function. The results indicate that prime number progression can be decomposed into periodic sequences. The main approach is to decompose it into sin or cosine function. Basically, it is applied to extract hidden periodicities in seemingly quasi periodic prime function. Numerical evidences were provided to confirm the periodic distribution of primes.

  7. Effectiveness of computer-tailored Smoking Cessation Advice in Primary Care (ESCAPE): a Randomised Trial

    E-Print Network [OSTI]

    Gilbert, Hazel; Nazareth, Irwin; Sutton, Stephen; Morris, Richard; Godfrey, Christine

    2008-04-29

    not fit all: the case for tailoring print materials. Annals of Behavioral Medi- cine 1999, 21:276-283. 11. Fiore MC, Novotny TE, Pierce JP, Giovino GA, Hatziandreu EJ: Meth- ods used to quit smoking in the United States. Do cessation programs help? JAMA... . Russell M, Wilson C, Taylor C, Baker CD: Effect of general prac- titioners' advice against smoking. BMJ 1979, 2:231-235.Page 8 of 8 (page number not for citation purposes) 22. Aveyard P, Griffin C, Lawrence T, Cheng KK: A controlled trial of an expert...

  8. MAVIDOS Maternal Vitamin D Osteoporosis Study: study protocol for a randomized controlled trial.

    E-Print Network [OSTI]

    Harvey, Nicholas C.; Javaid, Kassim; Bishop, Nicholas; Kennedy, Stephen; Papageorghiou, Aris T.; Fraser, Robert; Gandhi, Saurabh V.; Schoenmakers, Inez; Prentice, Ann; Cooper, Cyrus

    2012-02-07

    Maternal Vitamin D Osteoporosis Study: study protocol for a randomized controlled trial. The MAVIDOS Study Group Nicholas C Harvey1, Kassim Javaid2, Nicholas Bishop3, Stephen Kennedy4, Aris T Papageorghiou4, Robert Fraser5, Saurabh V Gandhi5, Inez... ]. The effect of maternal 25(OH)- vitamin D status appeared to be partly mediated via concentrations of venous umbilical cord calcium, sug- gesting that placental calcium transfer to the fetus may be a critical step in these associations. Indeed mRNA expression...

  9. PROVISIONING AND ANALYSIS OF APPLICATION-SPECIFIC INTERNET MEASUREMENTS

    E-Print Network [OSTI]

    Calyam, Prasad

    Graduate Program in Electrical and Computer Enginnering #12;#12;ABSTRACT Real-time applications such as videoconferencing and Grid computing are being widely deployed on the Internet. To effectively meet the QualityS metrics need to be sampled with strict periodicity for accurate network weather forecasting. To address

  10. Synthesis and photovoltaic application of coper (I) sulfide nanocrystals

    SciTech Connect (OSTI)

    Wu, Yue; Wadia, Cyrus; Ma, Wanli; Sadtler, Bryce; Alivisatos, A.Paul

    2008-06-24

    We present the rational synthesis of colloidal copper(I) sulfide nanocrystals and demonstrate their application as an active light absorbing component in combination with CdS nanorods to make a solution-processed solar cell with 1.6percent power conversion efficiency on both conventional glass substrates and flexible plastic substrates with stability over a 4 month testing period.

  11. Distributed MEMS Transmission Lines for Tunable Filter Applications

    E-Print Network [OSTI]

    York, Robert A.

    Distributed MEMS Transmission Lines for Tunable Filter Applications Yu Liu, Andrea Borgioli, Amit S: This paper describes the design and fabrication of a distributed MEMS ( )transmission line DMTL , used is a coplanar waveguide periodically loaded with continuously-variable MEMS capacitors. A tunable bandpass

  12. 1D, 2D, and 3D Periodic Structures: Electromagnetic Characterization, Design, and Measurement

    E-Print Network [OSTI]

    Brockett, Timothy John

    2013-01-01

    in applications such as solar cell efficiency and absorbingin applications such as solar cell efficiency and microwavethe overall solar cell efficiency is a multidisciplinary

  13. An Evaluation Framework for ITS Applications: Mobility, Safety and Environmental Sustainability

    E-Print Network [OSTI]

    deployment of V2V/V2I communications systems and sensors will require a long period of time, the evaluationAn Evaluation Framework for ITS Applications: Mobility, Safety and Environmental Sustainability Oak of deployed Connected Vehicle applications, justify the investment of installing sensors into vehicles

  14. Application Form Reference Number

    E-Print Network [OSTI]

    Po, Lai-Man

    /yyyy) (/) Title and Description of License/ Certificate/Activity // Date of Award (mm/yyyy) (/) Name Degree/Level Achieved Major Full-time or Part-time Date of Award (mm/yyyy) (/) Period From (mm-time Date of Award (mm/yyyy) (/) Period From (mm/yyyy) (/) To (mm/yyyy) (/) School

  15. Trials with a 100% pellet burden in blast furnace No. 6 at Hoogovens IJmuiden

    SciTech Connect (OSTI)

    Schoone, E.; Toxopeus, H.; Vos, D. [Hoogovens IJmuiden (Netherlands). Ironmaking and Raw Materials Div.

    1995-12-01

    The burden consists of 50% high basicity sinter and 50% home made olivine pellets. Two coke oven plants produce the required coke, about 340 kg/t (680 lb/NT). The average pulverized coal injection rate is 150 kg/t (300 lb/NT). To anticipate the aging coke oven plant No. 2 the coal injection capacity will e increased by 50% in 1996, by the installation of a third coal grinding line. In the Netherlands environmental issues have a high impact on further developments. In particular the environmental regulations require a significant decrease of dust, SO{sub 2} and dioxins emitted by the sinter plant. The appropriate measures must be concluded in the second part of this decade. To avoid costly conventional solutions Hoogovens has been testing since April, 1994 the Emission Optimized Sintering (EOS). In case of failure of EOS, the situation of a (partially) closed sinter plant was tested. Purchased pellets replaced sinter, leading to a 100% pellet and an 80% pellet/20% sinter trial. The trials were executed in the first half of 1994 at blast furnace No. 6, equipped with a PW-bell less top. Results are described.

  16. Field Trial of LANL On-Line Advanced Enrichment Monitor for UF6 GCEP

    SciTech Connect (OSTI)

    Ianakiev, Kiril D.; Lombardi, Marcie; MacArthur, Duncan W.; Parker, Robert F.; Smith, Morag K.; Keller, Clifford; Friend, Peter; Dunford, Andrew

    2012-07-13

    The outline of this presentation is: (1) Technology basis of on-line enrichment monitoring; (2) Timescale of trial; (3) Description of installed equipment; (4) Photographs; (5) Results; (6) Possible further development; and (7) Conclusions. Summary of the good things about the Advanced Enrichment Monitor (AEM) performance is: (1) High accuracy - normally better than 1% relative, (2) Active system as accurate as passive system, (3) Fast and accurate detection of enrichment changes, (4) Physics is well understood, (5) Elegant method for capturing pressure signal, and (6) Data capture is automatic, low cost and fast. A couple of negative things are: (1) Some jumps in measured passive enrichment - of around +2% relative (due to clock errors?); and (2) Data handling and evaluation is off-line, expensive and very slow. Conclusions are: (1) LANL AEM is being tested on E23 plant at Capenhurst; (2) The trial is going very well; (3) AEM could detect production of HEU at potentially much lower cost than existing CEMO; (4) AEM can measure {sup 235}U assay accurately; (5) Active system using X-Ray source would avoid need for pressure measurement; (6) Substantial work lies ahead to go from current prototype to a production instrument.

  17. Dosimetric intercomparison for multicenter clinical trials using a patient-based anatomic pelvic phantom

    SciTech Connect (OSTI)

    Ebert, M. A.; Harrison, K. M.; Howlett, S. J.; Cornes, D.; Bulsara, M.; Hamilton, C. S.; Kron, T.; Joseph, D. J.; Denham, J. W. [Department of Radiation Oncology, Sir Charles Gairdner Hospital, Western Australia 6009, Australia and School of Physics, University of Western Australia, 6009 Australia (Australia); Department of Radiation Oncology, Calvary Mater Newcastle, Waratah, New South Wales 2298 (Australia); Australasian College of Physical Scientists and Engineers in Medicine, Mascot, New South Wales 2020 (Australia); Trans-Tasman Radiation Oncology Group, Calvary Mater Newcastle, New South Wales 2298 (Australia); Institute of Health and Rehabilitation Research, University of Notre Dame, Fremantle, Western Australia 6160 (Australia); Heidelberg Repatriation Hospital, Victoria 3084 (Australia); Department of Physical Sciences, Peter MacCallum Cancer Centre, Victoria 3002 (Australia); Department of Radiation Oncology, Sir Charles Gairdner Hospital, Western Australia 6009, Australia and School of Surgery, University of Western Australia, Western Australia 6009 (Australia); Department of Radiation Oncology, Calvary Mater Newcastle, Waratah, New South Wales 2298, Australia and School of Medicine and Population Health, University of Newcastle, New South Wales 2308 (Australia)

    2011-09-15

    Purpose: To assess dose delivery accuracy to clinically significant points in a realistic patient geometry for two separate pelvic radiotherapy scenarios. Methods: An inhomogeneous pelvic phantom was transported to 36 radiotherapy centers in Australia and New Zealand. The phantom was treated according to Phase III rectal and prostate trial protocols. Point dose measurements were made with thermoluminescent dosimeters (TLDs) and an ionisation chamber. Comprehensive site-demographic, treatment planning, and physical data were collected for correlation with measurement outcomes. Results: Dose delivery to the prescription point for the rectal treatment was consistent with planned dose (mean difference between planned and measured dose - 0.1 {+-} 0.3% std err). Dose delivery in the region of the sacral hollow was consistently higher than planned (+1.2 {+-} 0.2%). For the prostate treatment, dose delivery to the prostate volume was consistent with planned doses (-0.49 {+-} 0.2%) and planned dose uniformity, though with a tendency to underdose the PTV at the prostate-rectal border. Measured out-of-field doses were significantly higher than planned. Conclusions: A phantom based on realistic anatomy and heterogeneity can be used to comprehensively assess the influence of multiple aspects of the radiotherapy treatment process on dose delivery. The ability to verify dose delivery for two trials with a single phantom was advantageous.

  18. Development of a dynamic quality assurance testing protocol for multisite clinical trial DCE-CT accreditation

    SciTech Connect (OSTI)

    Driscoll, B.; Keller, H.; Jaffray, D.; Coolens, C.; Department of Radiation Oncology, University of Toronto, 150 College Street, Toronto, Ontario M5S 3E2; Techna Institute, University Health Network, 124-100 College Street, Toronto, Ontario M5G 1L5

    2013-08-15

    Purpose: Credentialing can have an impact on whether or not a clinical trial produces useful quality data that is comparable between various institutions and scanners. With the recent increase of dynamic contrast enhanced-computed tomography (DCE-CT) usage as a companion biomarker in clinical trials, effective quality assurance, and control methods are required to ensure there is minimal deviation in the results between different scanners and protocols at various institutions. This paper attempts to address this problem by utilizing a dynamic flow imaging phantom to develop and evaluate a DCE-CT quality assurance (QA) protocol.Methods: A previously designed flow phantom, capable of producing predictable and reproducible time concentration curves from contrast injection was fully validated and then utilized to design a DCE-CT QA protocol. The QA protocol involved a set of quantitative metrics including injected and total mass error, as well as goodness of fit comparison to the known truth concentration curves. An additional region of interest (ROI) sensitivity analysis was also developed to provide additional details on intrascanner variability and determine appropriate ROI sizes for quantitative analysis. Both the QA protocol and ROI sensitivity analysis were utilized to test variations in DCE-CT results using different imaging parameters (tube voltage and current) as well as alternate reconstruction methods and imaging techniques. The developed QA protocol and ROI sensitivity analysis was then applied at three institutions that were part of clinical trial involving DCE-CT and results were compared.Results: The inherent specificity of robustness of the phantom was determined through calculation of the total intraday variability and determined to be less than 2.2 ± 1.1% (total calculated output contrast mass error) with a goodness of fit (R{sup 2}) of greater than 0.99 ± 0.0035 (n= 10). The DCE-CT QA protocol was capable of detecting significant deviations from the expected phantom result when scanning at low mAs and low kVp in terms of quantitative metrics (Injected Mass Error 15.4%), goodness of fit (R{sup 2}) of 0.91, and ROI sensitivity (increase in minimum input function ROI radius by 146 ± 86%). These tests also confirmed that the ASIR reconstruction process was beneficial in reducing noise without substantially increasing partial volume effects and that vendor specific modes (e.g., axial shuttle) did not significantly affect the phantom results. The phantom and QA protocol were finally able to quickly (<90 min) and successfully validate the DCE-CT imaging protocol utilized at the three separate institutions of a multicenter clinical trial; thereby enhancing the confidence in the patient data collected.Conclusions: A DCE QA protocol was developed that, in combination with a dynamic multimodality flow phantom, allows the intrascanner variability to be separated from other sources of variability such as the impact of injection protocol and ROI selection. This provides a valuable resource that can be utilized at various clinical trial institutions to test conformance with imaging protocols and accuracy requirements as well as ensure that the scanners are performing as expected for dynamic scans.

  19. Northeast Clean Energy Application Center

    SciTech Connect (OSTI)

    Bourgeois, Tom

    2013-09-30

    From October 1, 2009 through September 30, 2013 (“contract period”), the Northeast Clean Energy Application Center (“NE-CEAC”) worked in New York and New England (Connecticut, Rhode Island, Vermont, Massachusetts, New Hampshire, and Maine) to create a more robust market for the deployment of clean energy technologies (CETs) including combined heat and power (CHP), district energy systems (DES), and waste heat recovery (WHR) systems through the provision of technical assistance, education and outreach, and strategic market analysis and support for decision-makers. CHP, DES, and WHR can help reduce greenhouse gas emissions, reduce electrical and thermal energy costs, and provide more reliable energy for users throughout the United States. The NE-CEAC’s efforts in the provision of technical assistance, education and outreach, and strategic market analysis and support for decision-makers helped advance the market for CETs in the Northeast thereby helping the region move towards the following outcomes: • Reduction of greenhouse gas emissions and criteria pollutants • Improvements in energy efficiency resulting in lower costs of doing business • Productivity gains in industry and efficiency gains in buildings • Lower regional energy costs • Strengthened energy security • Enhanced consumer choice • Reduced price risks for end-users • Economic development effects keeping more jobs and more income in our regional economy Over the contract period, NE-CEAC provided technical assistance to approximately 56 different potential end-users that were interested in CHP and other CETs for their facility or facilities. Of these 56 potential end-users, five new CHP projects totaling over 60 MW of install capacity became operational during the contract period. The NE-CEAC helped host numerous target market workshops, trainings, and webinars; and NE-CEAC staff delivered presentations at many other workshops and conferences. In total, over 60 different workshops, conferences, webinars, and presentation were hosted or delivered during the contract period. The NE-CEAC also produced publically available educational materials such as CHP project profiles. Finally, the NE-CEAC worked closely with the relevant state agencies involved with CHP development. In New York, the NE-CEAC played an important role in securing and maintaining funding for CHP incentive programs administered by the New York State Energy Research Development Authority. NE-CEAC was also involved in the NYC Mayor's Office DG Collaborative. The NECEAC was also named a strategic resource for the Connecticut Department of Energy and Environmental Protection’s innovative Microgrid Pilot Program.

  20. CONTINUING STUDIES Application Package

    E-Print Network [OSTI]

    Northern British Columbia, University of

    CONTINUING STUDIES Application Package ADVANCED EMPLOYMENT SKILLS CERTIFICATE INSTRUCTIONS 1. Read added package for accommodation by UNBC. Students are not paid during the program except for the summer and intellectual development. CONTINUING STUDIES Application Package Advanced Employment Skills Certificate

  1. Steam Trap Application 

    E-Print Network [OSTI]

    Murphy, J. J.

    1982-01-01

    The effective application of steam traps encompasses three primary areas which are the selection and sizing, the installation, and the monitoring of the steam trapping system. Proper application of steam traps will improve production rates, product...

  2. Solution of the Sturm-Liouville and the Korteweg-de-Vries equations with periodic and quasi-periodic parameters using theory of vessels

    E-Print Network [OSTI]

    Andrey Melnikov

    2012-12-08

    We prove the existence of solutions to the Sturm-Liouville (SL) equation -y"(x)+q(x)y(x) = s^2 y(x) with periodic and quasi-periodic potential q(x) using theory of SL vessels, implementing a Backlund transformation of SL equation. In this paper quasi-periodic means a finite sum of periodic integrable functions. The solutions for a general s are explicitly constructed in terms of the solutions zn(x), satisfying the SL equation with initial conditions zn(0)=0, zn'(0)=1 for a discrete Levinson set of numbers s=sn, n-natural number. The tau function tau(x) of the corresponding vessel realizes the given potential via the formula q(x)= - 2(ln(tau(x)))". We also prove an analogue of the inverse scattering theorem in this setting too. Using the notion of "KdV evolutionary vessel", we construct a solution of the Korteweg-de-Vries (KdV) equation q'_t = - 3/2 q q'_x + 1/4 q"'_{xxx}, which coincides for t=0 with a given (periodic or quasi-periodic) potential.

  3. Critical experiments on an enriched uranium solution system containing periodically distributed strong thermal neutron absorbers

    SciTech Connect (OSTI)

    Rothe, R.E.

    1996-09-30

    A series of 62 critical and critical approach experiments were performed to evaluate a possible novel means of storing large volumes of fissile solution in a critically safe configuration. This study is intended to increase safety and economy through use of such a system in commercial plants which handle fissionable materials in liquid form. The fissile solution`s concentration may equal or slightly exceed the minimum-critical-volume concentration; and experiments were performed for high-enriched uranium solution. Results should be generally applicable in a wide variety of plant situations. The method is called the `Poisoned Tube Tank` because strong neutron absorbers (neutron poisons) are placed inside periodically spaced stainless steel tubes which separate absorber material from solution, keeping the former free of contamination. Eight absorbers are investigated. Both square and triangular pitched lattice patterns are studied. Ancillary topics which closely model typical plant situations are also reported. They include the effect of removing small bundles of absorbers as might occur during inspections in a production plant. Not taking the tank out of service for these inspections would be an economic advantage. Another ancillary topic studies the effect of the presence of a significant volume of unpoisoned solution close to the Poisoned Tube Tank on the critical height. A summary of the experimental findings is that boron compounds were excellent absorbers, as expected. This was true for granular materials such as Gerstley Borate and Borax; but it was also true for the flexible solid composed of boron carbide and rubber, even though only thin sheets were used. Experiments with small bundles of absorbers intentionally removed reveal that quite reasonable tanks could be constructed that would allow a few tubes at a time to be removed from the tank for inspection without removing the tank from production service.

  4. Compact source of narrow-band counterpropagating polarization-entangled photon pairs using a single dual-periodically poled crystal

    E-Print Network [OSTI]

    Yan-Xiao Gong; Zhen-Da Xie; Ping Xu; Xiao-Qiang Yu; Peng Xue; Shi-Ning Zhu

    2011-12-20

    We propose a scheme for the generation of counterpropagating polarization-entangled photon pairs from a dual-periodically poled crystal. Compared with the usual forward-wave type source, this source, in the backward-wave way, has a much narrower bandwidth. With a 2-cm-long bulk crystal, the bandwidths of the example sources are estimated to be 3.6 GHz, and the spectral brightnesses are more than 100 pairs/(s GHz mW). Two concurrent quasi-phase-matched spontaneous parametric down-conversion processes in a single crystal enable our source to be compact and stable. This scheme does not rely on any state projection and applies to both degenerate and non-degenerate cases, facilitating applications of the entangled photons.

  5. Student Volunteer Internship Application

    Office of Energy Efficiency and Renewable Energy (EERE)

    U.S. Department of Energy (DOE) Energy Efficiency and Renewable Energy Student Volunteer Internship Program application.

  6. A review of "Murder in the Tower and Other Tales from the State Trials." by Alan Wharam 

    E-Print Network [OSTI]

    Ellen J. Jenkins

    2003-01-01

    stream_source_info V61-I1-23-Jenkins.pdf.txt stream_content_type text/plain stream_size 8562 Content-Encoding ISO-8859-1 stream_name V61-I1-23-Jenkins.pdf.txt Content-Type text/plain; charset=ISO-8859-1 REVIEWS 87 a... fuller understanding of the trial and execution of ?that man of blood.? Alan Wharam. Murder in the Tower and Other Tales from the State Trials. Aldershot, U.K.: Ashgate, 2001. x + 286 pp. + 12 b&w illus. $84.95. Review by ELLEN J. JENKINS, ARKANSAS...

  7. Image Sensor Application

    E-Print Network [OSTI]

    Stanford University

    ; #12; #12; Image Sensor Lens Metadata Actions Flash ... Application Processor Con gure 1 and Statistics #12; Image Sensor Lens Metadata Actions Flash ... Application Processor Con gure 1 Expose 2 and Statistics #12; Image Sensor Lens Metadata Actions Flash ... Application Processor Con gure 1 Expose 2

  8. The period ratio for standing kink and sausage modes in solar structures with siphon flow. I. magnetized slabs

    E-Print Network [OSTI]

    Li, Bo; Chen, Yanjun

    2013-01-01

    In the applications of solar magneto-seismology(SMS), employing the ratio of the period of the fundamental mode to twice the one of its first overtone, $P_1/2P_2$, plays an important role. We examine how field-aligned flows affect the dispersion properties, and hence the period ratios, of standing modes supported by magnetic slabs in the solar atmosphere. We numerically solve the dispersion relations and devise a graphic means to construct standing modes. For coronal slabs, we find that the flow effects are significant, for the fast kink and sausage modes alike. For the kink ones, they may reduce $P_1/2P_2$ by up to 23% compared with the static case, and the minimum allowed $P_1/2P_2$ can fall below the lower limit analytically derived for static slabs. For the sausage modes, while introducing the flow reduces $P_1/2P_2$ by typically $\\lesssim 5$ % relative to the static case, it significantly increases the threshold aspect ratio only above which standing sausage modes can be supported, meaning that their det...

  9. Application of Phase Change Wallboard to an Energy-Conservation Building in the Cold Area in North China 

    E-Print Network [OSTI]

    Feng, G.; Deng, D.; Li, G.

    2006-01-01

    indicate that the application of phase change wallboard in the cold northern region, where there are abundant natural resources, combined with the national policy of reducing the cost of electricity and shifting portions of the load from periods of maximum...

  10. Property:OpenEI/UtilityRate/DemandChargePeriod7FAdj | Open Energy...

    Open Energy Info (EERE)

    Jump to: navigation, search This is a property of type Number. Name: Demand Charge Period 7 Fuel Adj Retrieved from "http:en.openei.orgwindex.php?titleProper...

  11. [2008, 23pp]---On certain period relations for cusp forms on GL_n.pdf

    E-Print Network [OSTI]

    2008-07-24

    International Mathematics Research Notices, Vol. 2008, Article ID rnn077, .... sponds to a Hilbert modular form of CM type, then our period relations are formally ...

  12. EIS-0466: Re-opening of Public Scoping Period and Announcement...

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

    Public Scoping Meetings Continued Operation of the Sandia National Laboratories, New Mexico Comment Period Ends: 9122011 Submit Comments to: Ms. Jeanette Norte NNSA Sandia Site...

  13. EIS-0350-S1: Extension of the Public Review and Comment Period...

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

    Period and Announcement of an Additional Public Hearing for the Draft Supplemental Environmental Impact Statement for the Nuclear Facility Portion of the Chemistry and Metallurgy...

  14. Computer Assisted 'Proof' of the Global Existence of Periodic Orbits in the Rössler System

    E-Print Network [OSTI]

    A. E. Botha; W. Dednam

    2014-08-14

    The numerical optimized shooting method for finding periodic orbits in nonlinear dynamical systems was employed to determine the existence of periodic orbits in the well-known R\\"ossler system. By optimizing the period $T$ and the three system parameters, $a$, $b$ and $c$, simultaneously, it was found that, for any initial condition $(x_0,y_0,z_0) \\in \\Re^3$, there exists at least one set of optimized parameters corresponding to a periodic orbit passing through $ (x_0,y_0,z_0)$. After a discussion of this result it was concluded that its analytical proof may present an interesting new mathematical challenge.

  15. Measuring the rotation period distribution of field M-dwarfs with Kepler

    E-Print Network [OSTI]

    McQuillan, Amy; Mazeh, Tsevi

    2013-01-01

    We have analysed 10 months of public data from the Kepler space mission to measure rotation periods of main-sequence stars with masses between 0.3 and 0.55 M_sun. To derive the rotational period we introduce the autocorrelation function and show that it is robust against phase and amplitude modulation and residual instrumental systematics. Of the 2483 stars examined, we detected rotation periods in 1570 (63.2%), representing an increase of a factor ~ 30 in the number of rotation period determination for field M-dwarfs. The periods range from 0.37-69.7 days, with amplitudes ranging from 1.0-140.8 mmags. The rotation period distribution is clearly bimodal, with peaks at ~ 19 and ~ 33 days, hinting at two distinct waves of star formation, a hypothesis that is supported by the fact that slower rotators tend to have larger proper motions. The two peaks of the rotation period distribution form two distinct sequences in period-temperature space, with the period decreasing with increasing temperature, reminiscent of ...

  16. DOE Extends Comment Period on Notice of Inquiry Under the Energy...

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

    Act of 2007, which implements the Convention on Supplementary Compensation for Nuclear Damage. The public comment period will be extended to October 27, 2010. The signed extension...

  17. A Low-Cost, High-Efficiency Periodic Flow Gas Turbine for Distributed Energy Generation

    SciTech Connect (OSTI)

    Dr. Adam London

    2008-06-20

    The proposed effort served as a feasibility study for an innovative, low-cost periodic flow gas turbine capable of realizing efficiencies in the 39-48% range.

  18. EIS-0250-S2 and EIS-0369: Notice of Public Comment Period Extension...

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

    Notice of Public Comment Period Extension and Additional Public Meeting Supplemental Yucca Mountain Rail Corridor and Rail Alignment The Department of Energy announced an...

  19. EIS-0299: Notice of Extension of Comment Period for the Environmental...

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

    period on the environmental impact statement (EIS) for the Proposed Production of Plutonium-238 for Use in Advanced Radioisotope Power Systems for Future Space Missions from...

  20. Does it matter if clinicians recruiting for a trial don't understand what the trial is really about? Qualitative study of surgeons' experiences of participation in a pragmatic multi-centre RCT

    E-Print Network [OSTI]

    Ziebland, Sue; Featherstone, Katie; Snowdon, Claire; Barker, Karen; Frost, Helen; Fairbank, Jeremy

    2007-01-27

    patients as indi- viduals rather than as part of a population or community, factors which may reduce faith in the value of RCTs [10]. Buchwald claims that some methods that are fundamen- tal to the conduct of trials, can be alien concepts for many surgeons...

  1. Application Protocol Reference Architecture Application Protocol Reference Architecture

    E-Print Network [OSTI]

    van Sinderen, Marten

    Application Protocol Reference Architecture 165 Chapter 7 Application Protocol Reference Architecture This chapter proposes an alternative reference architecture for application protocols. The proposed reference architecture consists of the set of possible architectures for application protocols

  2. Prospective Multicenter Trial Evaluating Balloon-Catheter Partial-Breast Irradiation for Ductal Carcinoma in Situ

    SciTech Connect (OSTI)

    Abbott, Andrea M.; Portschy, Pamela R.; Lee, Chung; Le, Chap T.; Han, Linda K.; Washington, Tara; Kinney, Michael; Bretzke, Margit; Tuttle, Todd M.

    2013-11-01

    Purpose: To determine outcomes of accelerated partial-breast irradiation (APBI) with MammoSite in the treatment of ductal carcinoma in situ (DCIS) after breast-conserving surgery. Methods and Materials: We conducted a prospective, multicenter trial between 2003 and 2009. Inclusion criteria included age >18 years, core needle biopsy diagnosis of DCIS, and no prior breast cancer history. Patients underwent breast-conserving surgery plus MammoSite placement. Radiation was given twice daily for 5 days for a total of 34 Gy. Patients were evaluated for development of toxicities, cosmetic outcome, and ipsilateral breast tumor recurrence (IBTR). Results: A total of 41 patients (42 breasts) completed treatment in the study, with a median follow up of 5.3 years. Overall, 28 patients (68.3%) experienced an adverse event. Skin changes and pain were the most common adverse events. Cosmetic outcome at 6 months was judged excellent/good by 100% of physicians and by 96.8% of patients. At 12 months, 86.7% of physicians and 92.3% of patients rated the cosmetic outcome as excellent/good. Overall, 4 patients (9.8%) developed an IBTR (all DCIS), with a 5-year actuarial rate of 11.3%. All IBTRs were outside the treatment field. Among patients with IBTRs, the mean time to recurrence was 3.2 years. Conclusions: Accelerated partial-breast irradiation using MammoSite seems to provide a safe and cosmetically acceptable outcome; however, the 9.8% IBTR rate with median follow-up of 5.3 years is concerning. Prospective randomized trials are necessary before routine use of APBI for DCIS can be recommended.

  3. Laser power beaming for satellite applications

    SciTech Connect (OSTI)

    Friedman, H.W.

    1993-09-22

    A serious consideration of laser power beaming for satellite applications appears to have grown out of a NASA mission analysis for transmitting power to lunar bases during the two week dark period. System analyses showed that laser power beaming to the moon in conjunction with efficient, large area solar cell collection panels, were an attractive alternative to other schemes such as battery storage and nuclear generators, largely because of the high space transportation costs. The primary difficulty with this scheme is the need for very high average power visible lasers. One system study indicated that lasers in excess of 10 MW at a wavelength of approximately 850 nm were required. Although such lasers systems have received much attention for military applications, their realization is still a long term goal.

  4. For Release: Wednesday, May 26, 2010 Landmark NIH Clinical Trial Comparing Two Stroke Prevention Procedures Shows Surgery and

    E-Print Network [OSTI]

    Bandettini, Peter A.

    , the third leading cause of death in the United States, is caused by an interruption in blood flow Revascularization Endarterectomy vs. Stenting Trial (CREST) took place at 117 centers in the United States-year rates of the study's endpoints ­ early stroke, heart attack, or death and later stroke - between

  5. Predictive building automation Research results from a field trial Special event in Allschwil, Thursday, September 20, 2012

    E-Print Network [OSTI]

    Fischlin, Andreas

    Predictive building automation ­ Research results from a field trial Special event in Allschwil-efficient control while maintaining a high level of comfort for the building users. Predictive building automation of computer simulations. The project partners focused on the so-called integrated room automation, which deals

  6. Fusion power faces big crunch Europe poised to decide whether to go it alone on 3bn trial reactor

    E-Print Network [OSTI]

    Fusion power faces big crunch Europe poised to decide whether to go it alone on £3bn trial reactor rewards: cheap, clean and almost limitless electricity for an increasingly energy-hungry planet. But), an ambitious, £3bn project that aims to prove, once and for all, that fusion power offers the best solution

  7. Chale, How Much it Cost to Browse? Results from a Mobile Data Price Transparency Trial in Ghana

    E-Print Network [OSTI]

    Aoki, Paul M.

    13 Chale, How Much it Cost to Browse? Results from a Mobile Data Price Transparency Trial in Ghana-Saharan Africa (SSA) showed that mobile phone spending was 10-26% of individual income in the lower-75% income]. This rise cuts across a range of socioeconomic groups because it often enables cost savings (e.g., over

  8. 2Dimensional localization of acoustic waves in random perturbation of periodic media.

    E-Print Network [OSTI]

    2­Dimensional localization of acoustic waves in random perturbation of periodic media. Hatem NAJAR to the spectral properties of the relevant self­adjoint di#erential operator. As far as the acoustic waves, electromagnetic or acoustic) waves in a periodic me­ dia perturbed by random impurities. See [7, 8, 9, 10

  9. Guide to Library Resources for English 110 Finding Books, Periodicals, Microforms and Media

    E-Print Network [OSTI]

    Cakoni, Fioralba

    the Library of Congress Classification System. Each book (or bound volume of a periodical) is assigned a call1 Guide to Library Resources for English 110 Finding Books, Periodicals, Microforms and Media held by the University of Delaware Library, you may wish to start by searching DELCAT or WorldCat Local

  10. Periodic Cooling of Bird Eggs Reduces Embryonic Growth Efficiency Christopher R. Olson*

    E-Print Network [OSTI]

    Vleck, Carol

    927 Periodic Cooling of Bird Eggs Reduces Embryonic Growth Efficiency Christopher R. Olson* Carol M, periodic cooling occurs when the in- cubating adult leaves the nest to forage, but the effects of pe- riodic cooling on embryo growth, yolk use, and metabolism are poorly known. To address this question, we

  11. CONTROLLING ENERGY INTAKE IN THE PREPARTUM PERIOD TO IMPROVE TRANSITION COW HEALTH

    E-Print Network [OSTI]

    Farrell, Anthony P.

    CONTROLLING ENERGY INTAKE IN THE PREPARTUM PERIOD TO IMPROVE TRANSITION COW HEALTH by LORI ANN A common feeding practice during the dry period is to switch dairy cows to a low forage, energy dense diet 3 weeks prepartum, but this practice has been criticized as it may lead to the overconsumption

  12. Characterization of LMS and DMR Beamformers in the Presence of Loud Periodic Interferers

    E-Print Network [OSTI]

    George Mason University

    Characterization of LMS and DMR Beamformers in the Presence of Loud Periodic Interferers Geoffrey C introduced loud impulsive periodic interferers into these systems. Standard LMS adaptive beamforming interference. 1. INTRODUCTION Adaptive Least Mean-Square (LMS) beamformers are efficient algorithms, providing

  13. Efficient Solvers for Nonlinear Time-Periodic Eddy Current F. Bachinger

    E-Print Network [OSTI]

    Schoeberl, Joachim

    Efficient Solvers for Nonlinear Time-Periodic Eddy Current Problems F. Bachinger U. Langer J. Sch-periodic eddy current problems, ranging from the description of the nonlinearity to an efficient solution setup, the magnetic field and the thereby generated eddy currents hardly penetrate into conducting

  14. Traveling Waves Solutions for Bistable Differential-Difference Equations with Periodic Diffusion

    E-Print Network [OSTI]

    Elmer, Christopher E.; Van Vleck, Erik

    2001-10-05

    on the underlying lattice as well as on time. For the case of spatially periodic diffusion we obtain analytic solutions for the traveling wave problem using a piecewise linear nonlinearity. The formula for the wave forms is implicitly defined in the general periodic...

  15. Trepanation in South-Central Peru During the Early Late Intermediate Period (ca. AD 10001250)

    E-Print Network [OSTI]

    Cosmides, Leda

    Trepanation in South-Central Peru During the Early Late Intermediate Period (ca. AD 1000-two individuals from Andahuaylas, AMS radiocarbon dated to the early Late Intermediate Period (ca. AD 1000 grooving, drilling and boring, and lin- ear cutting were far less successful. Evidence of perioperative

  16. Comparison of quantization of charge transport in periodic and open pumps

    E-Print Network [OSTI]

    Comparison of quantization of charge transport in periodic and open pumps G.M. Graf and G. Ortelli the charges transported in two systems, a spatially periodic and an open quantum pump, both depending physical situations become the same, i.e., that of a large open pump. 1 Introduction In this note we

  17. Temporal evolution of long-timescale periodicities in ULX NGC 5408 X-1

    E-Print Network [OSTI]

    An, Tao; Wang, Jun-Yi

    2015-01-01

    Context. NGC 5408 X-1 is one of the few ultraluminous X-ray sources with an extensive monitoring program in X-rays (a temporal baseline of 4.2 yr), making it one of the most suitable candidates to study the long-timescale quasi-periodic oscillations (QPOs). Aims. Previous timing analysis of the Swift data of NGC 5408 X-1 led to detection of multiple periodicities ranging from 2.6 d to 230 d. In this paper, we focus on the statistical significance and the temporal evolution of these periodicities. Methods. A time-series analysis technique in the time-frequency domain, the weighted wavelet Z-transform (WWZ), was employed to identify the periodicities and trace their variations with time. Results. Three periodic components were detected from the WWZ periodogram, corresponding to periods of 2.65$\\pm$0.01 d, 115.4$\\pm$14.4 d and 189.1$\\pm$15.2 d. All three have statistical significance higher than 99.74%. The 2.65-d periodicity is quite stable in the majority of the light curve. The 115-d periodicity is the most p...

  18. Transport and Fractionation in Periodic Potential-Energy Landscapes Matthew Pelton and Kosta Ladavac

    E-Print Network [OSTI]

    Grier, David

    . Grier Dept. of Physics and Center for Soft Matter Research New York University, New York, NY 10003Transport and Fractionation in Periodic Potential-Energy Landscapes Matthew Pelton and Kosta (Dated: January 2, 2012) Objects driven through periodically modulated potential-energy landscapes in two

  19. QUANTUM ENERGY EXPECTATION IN PERIODIC TIME-DEPENDENT HAMILTONIANS VIA GREEN

    E-Print Network [OSTI]

    1. Introduction Consider a general periodically driven quantum hamiltonian system H(t) = H0 + V (t the system then Um F is this state at time m. Typically, the unper- turbed hamiltonian H0 is assumed to have accelerator in which a particle can acquire unbounded energy from collisions with a heavy periodically moving

  20. Numerical implementation of static Field Dislocation Mechanics theory for periodic media

    E-Print Network [OSTI]

    Acharya, Amit

    Numerical implementation of static Field Dislocation Mechanics theory for periodic media R of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 1206 W. Green St., Urbana, IL investigates the implementation of Field Dislocation Mechanics theory for media with a periodic microstructure

  1. Stable all-optical limiting in nonlinear periodic structures. I. Analysis

    E-Print Network [OSTI]

    Pelinovsky, Dmitry

    Stable all-optical limiting in nonlinear periodic structures. I. Analysis Dmitry Pelinovsky consider propagation of coherent light through a nonlinear periodic optical structure consisting of two al-dependent dy- namics. We find the domain for existence of true all-optical limiting when the input

  2. Periodic migration in a physical model of cells on micropatterns Brian A. Camley,1, 2

    E-Print Network [OSTI]

    Li, Bo

    Periodic migration in a physical model of cells on micropatterns Brian A. Camley,1, 2 Yanxiang Zhao, bipedal motion, and periodic migration, in which the cell crawls persistently in one direction before-dimensional extracellular ma- trix (ECM). However, cells in ECM often exhibit qualitatively different modes of migration

  3. Predicting short-period, wind-wave-generated seismic1 noise in coastal regions2

    E-Print Network [OSTI]

    Tsai, Victor C.

    Predicting short-period, wind-wave-generated seismic1 noise in coastal regions2 Florent Gimberta recorded in this period range is mostly caused by local wind-waves, i.e. by wind-waves occurring within in nearly opposite directions is orders of magnitude smaller than previously suggested for wind-waves, does

  4. Semi-automatic Construction of Cross-period Thesaurus Chaya Liebeskind, Ido Dagan, Jonathan Schler

    E-Print Network [OSTI]

    Wintner, Shuly

    Semi-automatic Construction of Cross-period Thesaurus Chaya Liebeskind, Ido Dagan, Jonathan Schler-period (Diachronic) Thesaurus Automatic generation of candidates Research objective Our task: · Support searches of cultural resources · High-quality diachronic thesaurus construction Semi-automatic setting Hardly explored

  5. Emergence of unsteady dark solitary waves from coalescing spatially-periodic patterns

    E-Print Network [OSTI]

    Bridges, Tom

    Emergence of unsteady dark solitary waves from coalescing spatially-periodic patterns Thomas J of the defocussing nonlinear Schrödinger equation. In this paper the interest is in a mechanism for the emergence is on the periodic state at innity as the generator. It is shown that a natural mechanism for the emergence

  6. Local energy decay and Strichartz estimates for the wave equation with time-periodic

    E-Print Network [OSTI]

    Petkov, Vesselin

    Local energy decay and Strichartz estimates for the wave equation with time-periodic perturbations(z) = (U(T, 0) - z)-1 , (x) C 0 (Rn ), where U(t, s) is the propagator related to the wave equation) and T > 0 is the period. Assuming that R(z) has no poles z with |z| 1, we establish a local energy decay

  7. Multi-Period Production Capacity Planning for Integrated Product and Production System Design*

    E-Print Network [OSTI]

    Saitou, Kazuhiro "Kazu"

    Multi-Period Production Capacity Planning for Integrated Product and Production System Design* Emre.ac.uk kazu@umich.edu .Abstract ­ This paper presents a simulation-based method to aid multi-period production capacity planning by quantifying the trade-off between product quality and production cost. The product

  8. Entrainment to Periodic Initiation and Transition Rates in a Computational Model for Gene Translation

    E-Print Network [OSTI]

    Margaliot, Michael

    1 Entrainment to Periodic Initiation and Transition Rates in a Computational Model for Gene, the biological system must entrain or phase-lock to the periodic excitation. Entrainment is also important in synthetic biology. For example, connecting several artificial biological systems that entrain to a common

  9. Entrainment to Periodic Initiation and Transition Rates in a Computational Model for Gene Translation

    E-Print Network [OSTI]

    Sontag, Eduardo

    Entrainment to Periodic Initiation and Transition Rates in a Computational Model for Gene to the solar day. In the terminology of systems theory, the biological system must entrain or phase-lock to the periodic excitation. Entrainment is also important in synthetic biology. For example, connecting several

  10. June 15, 1996 / Vol. 21, No. 12 / OPTICS LETTERS 857 Photorefractive effects in periodically poled ferroelectrics

    E-Print Network [OSTI]

    Fejer, Martin M.

    June 15, 1996 / Vol. 21, No. 12 / OPTICS LETTERS 857 Photorefractive effects in periodically poled-state photorefractive index perturbations caused by a given optical irradiance distribution in a periodically poled are reduced compared with those in a homogeneously poled crystal by approximately the square of the product

  11. A Multiband Generalization of the Analysis of Variance Period Estimation Algorithm and the Effect of Inter-band Observing Cadence on Period Recovery Rate

    E-Print Network [OSTI]

    Mondrik, Nicholas; Marshall, Jennifer L

    2015-01-01

    We present a new method of extending the single band Analysis of Variance period estimation algorithm to multiple bands. We use SDSS Stripe 82 RR Lyrae to show that in the case of low number of observations per band and non-simultaneous observations, improvements in period recovery rates of up to $\\approx$60\\% are observed. We also investigate the effect of inter-band observing cadence on period recovery rates. We find that using non-simultaneous observation times between bands is ideal for the multiband method, and using simultaneous multiband data is only marginally better than using single band data. These results will be particularly useful in planning observing cadences for wide-field astronomical imaging surveys such as LSST. They also have the potential to improve the extraction of transient data from surveys with few ($\\lesssim 30$) observations per band across several bands, such as the Dark Energy Survey.

  12. Functional Polypeptides for Biomedical Applications

    E-Print Network [OSTI]

    Kramer, Jessica R.

    2012-01-01

    for microbial fuel cell applications was explored, and thefor microbial fuel cell applications was explored, and the

  13. A survey for very short-period planets in the Kepler data

    SciTech Connect (OSTI)

    Jackson, Brian; Stark, Christopher C.; Chambers, John; Adams, Elisabeth R.; Deming, Drake

    2013-12-20

    We conducted a search for very short-period transiting objects in the publicly available Kepler data set. Our preliminary survey has revealed four planetary candidates, all with orbital periods less than 12 hr. We have analyzed the data for these candidates using photometric models that include transit light curves, ellipsoidal variations, and secondary eclipses to constrain the candidates' radii, masses, and effective temperatures. Even with masses of only a few Earth masses, the candidates' short periods mean that they may induce stellar radial velocity signals (a few m s{sup –1}) detectable by currently operating facilities. The origins of such short-period planets are unclear, but we discuss the possibility that they may be the remnants of disrupted hot Jupiters. Whatever their origins, if confirmed as planets, these candidates would be among the shortest-period planets ever discovered. Such planets would be particularly amenable to discovery by the planned TESS mission.

  14. Toward Semi-automated Assessment of Target Volume Delineation in Radiotherapy Trials: The SCOPE 1 Pretrial Test Case

    SciTech Connect (OSTI)

    Gwynne, Sarah; Spezi, Emiliano; Wills, Lucy; Nixon, Lisette; Hurt, Chris; Joseph, George; Evans, Mererid; Griffiths, Gareth; Crosby, Tom; Staffurth, John

    2012-11-15

    Purpose: To evaluate different conformity indices (CIs) for use in the analysis of outlining consistency within the pretrial quality assurance (Radiotherapy Trials Quality Assurance [RTTQA]) program of a multicenter chemoradiation trial of esophageal cancer and to make recommendations for their use in future trials. Methods and Materials: The National Cancer Research Institute SCOPE 1 trial is an ongoing Cancer Research UK-funded phase II/III randomized controlled trial of chemoradiation with capecitabine and cisplatin with or without cetuximab for esophageal cancer. The pretrial RTTQA program included a detailed radiotherapy protocol, an educational package, and a single mid-esophageal tumor test case that were sent to each investigator to outline. Investigator gross tumor volumes (GTVs) were received from 50 investigators in 34 UK centers, and CERR (Computational Environment for Radiotherapy Research) was used to perform an assessment of each investigator GTV against a predefined gold-standard GTV using different CIs. A new metric, the local conformity index (l-CI), that can localize areas of maximal discordance was developed. Results: The median Jaccard conformity index (JCI) was 0.69 (interquartile range, 0.62-0.70), with 14 of 50 investigators (28%) achieving a JCI of 0.7 or greater. The median geographical miss index was 0.09 (interquartile range, 0.06-0.16), and the mean discordance index was 0.27 (95% confidence interval, 0.25-0.30). The l-CI was highest in the middle section of the volume, where the tumor was bulky and more easily definable, and identified 4 slices where fewer than 20% of investigators achieved an l-CI of 0.7 or greater. Conclusions: The available CIs analyze different aspects of a gold standard-observer variation, with JCI being the most useful as a single metric. Additional information is provided by the l-CI and can focus the efforts of the RTTQA team in these areas, possibly leading to semi-automated outlining assessment.

  15. Technical applications of aerogels

    SciTech Connect (OSTI)

    Hrubesh, L.W.

    1997-08-18

    Aerogel materials posses such a wide variety of exceptional properties that a striking number of applications have developed for them. Many of the commercial applications of aerogels such as catalysts, thermal insulation, windows, and particle detectors are still under development and new application as have been publicized since the ISA4 Conference in 1994: e.g.; supercapacitors, insulation for heat storage in automobiles, electrodes for capacitive deionization, etc. More applications are evolving as the scientific and engineering community becomes familiar with the unusual and exceptional physical properties of aerogels, there are also scientific and technical application, as well. This paper discusses a variety of applications under development at Lawrence Livermore National Laboratory for which several types of aerogels are formed in custom sizes and shapes. Particular discussions will focus on the uses of aerogels for physics experiments which rely on the exceptional, sometimes unique, properties of aerogels.

  16. Application Porting and Performance

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

    code modifications in order to run efficiently on Cori's Knights Landing manycore architecture. To run well on Cori, your application will need to have good thread scalability,...

  17. Application Protocols o Multimedia

    E-Print Network [OSTI]

    Biagioni, Edoardo S.

    Application Protocols o Telnet o FTP o WWW o SMTP o NNTP o IRC 7 #12; IRC o Internet Relay Chat o similar to telnet o chat

  18. Membrane Applications at Ceramatec

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

    Applications at Ceramatec Solid Electrolyte Ion Conductors CO 2 to Syngas GTL Advanced Batteries oxygen Fluorine Hydrogen Alkali metals Specialty Chemicals Waste Remediation...

  19. Materials Physics and Applications

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

    MPA Materials Physics and Applications We develop new technologies that solve pressing national energy and security challenges by exploring and exploiting materials and their...

  20. 70 Gy Versus 80 Gy in Localized Prostate Cancer: 5-Year Results of GETUG 06 Randomized Trial;Prostate cancer; Dose escalation; Conformal radiotherapy; Randomized trial

    SciTech Connect (OSTI)

    Beckendorf, Veronique, E-mail: v.beckendorf@nancy.fnclcc.fr [Centre Alexis Vautrin, Vandoeuvre les Nancy (France); Guerif, Stephane [Centre Hospitalier Universitaire, Poitiers (France); Le Prise, Elisabeth [Centre Eugene Marquis, Rennes (France); Cosset, Jean-Marc [Institut Curie, Paris (France); Bougnoux, Agnes [Hopital Bretonneau Tours (France); Chauvet, Bruno [Institut Sainte-Catherine, Avignon (France); Salem, Naji [Institut Paoli-Calmette, Marseille (France); Chapet, Olivier [Centre Hospitalier Lyon-Sud, Pierre-Benite (France); Bourdain, Sylvain [Centre Rene Gauducheau, Saint Herblain (France); Bachaud, Jean-Marc [Centre Claudius Regaud, Toulouse (France); Maingon, Philippe [Centre George-Francois Leclerc, Dijon (France); Hannoun-Levi, Jean-Michel [Centre Antoine Lacassagne, Nice (France); Malissard, Luc [La Chaussee Saint Victor (France); Simon, Jean-Marc [Hopital de la Pitie-Salpetriere, Paris (France); Pommier, Pascal [Centre Leon Berard, Lyon (France); Hay, Men [Centre Val D'Aurelle, Montpellier (France); Dubray, Bernard [Centre Henri Becquerel, Rouen (France); Lagrange, Jean-Leon [Hopital Henri-Mondor, Creteil (France); Luporsi, Elisabeth [Centre Alexis Vautrin, Vandoeuvre les Nancy (France); Bey, Pierre [Institut Curie, Paris (France)

    2011-07-15

    Purpose: To perform a randomized trial comparing 70 and 80 Gy radiotherapy for prostate cancer. Patients and Methods: A total of 306 patients with localized prostate cancer were randomized. No androgen deprivation was allowed. The primary endpoint was biochemical relapse according to the modified 1997-American Society for Therapeutic Radiology and Oncology and Phoenix definitions. Toxicity was graded using the Radiation Therapy Oncology Group 1991 criteria and the late effects on normal tissues-subjective, objective, management, analytic scales (LENT-SOMA) scales. The patients' quality of life was scored using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire 30-item cancer-specific and 25-item prostate-specific modules. Results: The median follow-up was 61 months. According to the 1997-American Society for Therapeutic Radiology and Oncology definition, the 5-year biochemical relapse rate was 39% and 28% in the 70- and 80-Gy arms, respectively (p = .036). Using the Phoenix definition, the 5-year biochemical relapse rate was 32% and 23.5%, respectively (p = .09). The subgroup analysis showed a better biochemical outcome for the higher dose group with an initial prostate-specific antigen level >15 ng/mL. At the last follow-up date, 26 patients had died, 10 of their disease and none of toxicity, with no differences between the two arms. According to the Radiation Therapy Oncology Group scale, the Grade 2 or greater rectal toxicity rate was 14% and 19.5% for the 70- and 80-Gy arms (p = .22), respectively. The Grade 2 or greater urinary toxicity was 10% at 70 Gy and 17.5% at 80 Gy (p = .046). Similar results were observed using the LENT-SOMA scale. Bladder toxicity was more frequent at 80 Gy than at 70 Gy (p = .039). The quality-of-life questionnaire results before and 5 years after treatment were available for 103 patients with no differences found between the 70- and 80-Gy arms. Conclusion: High-dose radiotherapy provided a better 5-year biochemical outcome with slightly greater toxicity.

  1. Redesigning Radiotherapy Quality Assurance: Opportunities to Develop an Efficient, Evidence-Based System to Support Clinical Trials-Report of the National Cancer Institute Work Group on Radiotherapy Quality Assurance

    SciTech Connect (OSTI)

    Bekelman, Justin E.; Deye, James A.; Vikram, Bhadrasain; Bentzen, Soren M.; Bruner, Deborah; Curran, Walter J.; Dignam, James; Efstathiou, Jason A.; FitzGerald, T.J.; Hurkmans, Coen; Ibbott, Geoffrey S.; Lee, J. Jack; Merchant, Thomas E.; Michalski, Jeff; Palta, Jatinder R.; Simon, Richard; Ten Haken, Randal K.; Timmerman, Robert; Tunis, Sean; Coleman, C. Norman; and others

    2012-07-01

    Purpose: In the context of national calls for reorganizing cancer clinical trials, the National Cancer Institute sponsored a 2-day workshop to examine challenges and opportunities for optimizing radiotherapy quality assurance (QA) in clinical trial design. Methods and Materials: Participants reviewed the current processes of clinical trial QA and noted the QA challenges presented by advanced technologies. The lessons learned from the radiotherapy QA programs of recent trials were discussed in detail. Four potential opportunities for optimizing radiotherapy QA were explored, including the use of normal tissue toxicity and tumor control metrics, biomarkers of radiation toxicity, new radiotherapy modalities such as proton beam therapy, and the international harmonization of clinical trial QA. Results: Four recommendations were made: (1) to develop a tiered (and more efficient) system for radiotherapy QA and tailor the intensity of QA to the clinical trial objectives (tiers include general credentialing, trial-specific credentialing, and individual case review); (2) to establish a case QA repository; (3) to develop an evidence base for clinical trial QA and introduce innovative prospective trial designs to evaluate radiotherapy QA in clinical trials; and (4) to explore the feasibility of consolidating clinical trial QA in the United States. Conclusion: Radiotherapy QA can affect clinical trial accrual, cost, outcomes, and generalizability. To achieve maximum benefit, QA programs must become more efficient and evidence-based.

  2. Males showed no response to air-borne female Experimental Protocol: Prior to the first trial, the first female was placed in the cube on the left maze arm.

    E-Print Network [OSTI]

    Gaffin, Doug

    to the first trial, the first female was placed in the cube on the left maze arm. Each trial was initiated by dropping a male scorpion into the end of the long arm. Males were allowed five minutes to move into the left or right arm of the arena. We considered a trial complete when the male scorpion entered either

  3. Name:______________ Period:_____________

    E-Print Network [OSTI]

    Lega, Joceline

    cup to balance the system again. Fill in the following table for when the system is balanced: Plot on the line and finding the ratio (expressed as a fraction) of the change in the y- coordinates to the change in the x- coordinates. slope= rise run = y2-y1 x2-x1 6: Label two points in the line and fill

  4. Persian Period

    E-Print Network [OSTI]

    Klotz, David

    2015-01-01

    the Great, Persia invaded Egypt twice and administered it asEl- Qeis) in Upper Egypt (BM 37496; Yoyotte 1972b: pl. 19a;sites are on the fringes of Egypt: Kharga Oasis to the west,

  5. Amarna Period

    E-Print Network [OSTI]

    Williamson, Jacquelyn

    2015-01-01

    The city of Akhenaten I. London: Egypt Exploration Society.of Akhenaten III. London: Egypt Exploration Society. Petrie,the American Research Center in Egypt 25, pp. 117-121. 1991

  6. Formation of laser-induced periodic surface structures on niobium by femtosecond laser irradiation

    SciTech Connect (OSTI)

    Pan, A.; Dias, A.; Gomez-Aranzadi, M.; Olaizola, S. M. [CIC microGUNE, Goiru Kalea 9 Polo Innovación Garaia, 20500 Arrasate-Mondragón (Spain); CEIT-IK4 and Tecnun, University of Navarra, Manuel Lardizábal 15, 20018 San Sebastián (Spain); Rodriguez, A. [CIC microGUNE, Goiru Kalea 9 Polo Innovación Garaia, 20500 Arrasate-Mondragón (Spain)

    2014-05-07

    The surface morphology of a Niobium sample, irradiated in air by a femtosecond laser with a wavelength of 800?nm and pulse duration of 100 fs, was examined. The period of the micro/nanostructures, parallel and perpendicularly oriented to the linearly polarized fs-laser beam, was studied by means of 2D Fast Fourier Transform analysis. The observed Laser-Induced Periodic Surface Structures (LIPSS) were classified as Low Spatial Frequency LIPSS (periods about 600?nm) and High Spatial Frequency LIPSS, showing a periodicity around 300?nm, both of them perpendicularly oriented to the polarization of the incident laser wave. Moreover, parallel high spatial frequency LIPSS were observed with periods around 100?nm located at the peripheral areas of the laser fingerprint and overwritten on the perpendicular periodic gratings. The results indicate that this method of micro/nanostructuring allows controlling the Niobium grating period by the number of pulses applied, so the scan speed and not the fluence is the key parameter of control. A discussion on the mechanism of the surface topology evolution was also introduced.

  7. The Lyapunov function for Schrödinger operators with a periodic 2x2 matrix potential

    E-Print Network [OSTI]

    Andrei Badanin; Jochen Brüning; Evgeny Korotyaev

    2005-08-29

    We consider the Schr\\"odinger operator on the real line with a 2x2 matrix valued 1-periodic potential. The spectrum of this operator is absolutely continuous and consists of intervals separated by gaps. We define a Lyapunov function which is analytic on a two sheeted Riemann surface. On each sheet, the Lyapunov function has the same properties as in the scalar case, but it has branch points, which we call resonances. We prove the existence of real as well as non-real resonances for specific potentials. We determine the asymptotics of the periodic and anti-periodic spectrum and of the resonances at high energy. We show that there exist two type of gaps: 1) stable gaps, where the endpoints are periodic and anti-periodic eigenvalues, 2) unstable (resonance) gaps, where the endpoints are resonances (i.e., real branch points of the Lyapunov function). We also show that periodic and anti-periodic spectrum together determine the spectrum of the matrix Hill operator.

  8. Asteroid lightcurves from the Palomar Transient Factory survey: Rotation periods and phase functions from sparse photometry

    E-Print Network [OSTI]

    Waszczak, Adam; Ofek, Eran O; Laher, Russ; Masci, Frank; Levitan, David; Surace, Jason; Cheng, Yu-Chi; Ip, Wing-Huen; Kinoshita, Daisuke; Helou, George; Prince, Thomas A; Kulkarni, Shrinivas

    2015-01-01

    We fit 54,296 sparsely-sampled asteroid lightcurves in the Palomar Transient Factory to a combined rotation plus phase-function model. Each lightcurve consists of 20+ observations acquired in a single opposition. Using 805 asteroids in our sample that have reference periods in the literature, we find the reliability of our fitted periods is a complicated function of the period, amplitude, apparent magnitude and other attributes. Using the 805-asteroid ground-truth sample, we train an automated classifier to estimate (along with manual inspection) the validity of the remaining 53,000 fitted periods. By this method we find 9,033 of our lightcurves (of 8,300 unique asteroids) have reliable periods. Subsequent consideration of asteroids with multiple lightcurve fits indicate 4% contamination in these reliable periods. For 3,902 lightcurves with sufficient phase-angle coverage and either a reliably-fit period or low amplitude, we examine the distribution of several phase-function parameters, none of which are bimo...

  9. Summary of Dissimilar Metal Joining Trials Conducted by Edison Welding Institute

    SciTech Connect (OSTI)

    MJ Lambert

    2005-11-18

    Under the direction of the NASA-Glenn Research Center, the Edison Welding Institute (EWI) in Columbus, OH performed a series of non-fusion joining experiments to determine the feasibility of joining refractory metals or refractory metal alloys to Ni-based superalloys. Results, as reported by EWI, can be found in the project report for EWI Project 48819GTH (Attachment A, at the end of this document), dated October 10, 2005. The three joining methods used in this investigation were inertia welding, magnetic pulse welding, and electro-spark deposition joining. Five materials were used in these experiments: Mo-47Re, T-111, Hastelloy X, Mar M-247 (coarse-grained, 0.5 mm to several millimeter average grain size), and Mar M-247 (fine-grained, approximately 50 {micro}m average grain size). Several iterative trials of each material combination with each joining method were performed to determine the best practice joining method. Mo-47Re was found to be joined easily to Hastelloy X via inertia welding, but inertia welding of the Mo-alloy to both Mar M-247 alloys resulted in inconsistent joint strength and large reaction layers between the two metals. T-111 was found to join well to Hastelloy X and coarse-grained Mar M-247 via inertia welding, but joining to fine-grained Mar M-247 resulted in low joint strength. Magnetic pulse welding (MPW) was only successful in joining T-111 tubing to Hastelloy X bar stock. The joint integrity and reaction layer between the metals were found to be acceptable. This single joining trial, however, caused damage to the electromagnetic concentrators used in this process. Subsequent design efforts to eliminate the problem resulted in a loss of power imparted to the accelerating work piece, and results could not be reproduced. Welding trials of Mar M-247 to T-111 resulted in catastrophic failure of the bar stock, even at lower power. Electro-spark deposition joining of Mo-47Re, in which the deposited material was Hastelloy X, did not have a noticeable reaction layer. T-111 was found to have a small reaction layer at the interface with deposited Hastelloy X. Mar M-247 had a reaction layer larger than T-111. Hastelloy X joined well with a substrate of the same alloy, and throughout the experiments was found to have a density of {approx}99%, based on metallographic observations of porosity in the deposit. Of the three joining methods tested, inertial welding of bar stock appears to be the most mature at this time. MPW may be an attractive alternative due to the potential for high bond integrity, similar to that seen in explosion bonding. However, all three joining methods used in this work will require adaptation in order to join piping and tubing. Further investigations into the change in mechanical properties of these joints with time, temperature, irradiation, and the use of interlayers between the two materials must also be performed.

  10. Application Code for applicants for Master'

    E-Print Network [OSTI]

    Kaji, Hajime

    -supervisor New value of future electric device originated from new materials. We focus on the materials and Microsystem Professor Doctor of Engineering (Tohoku Univ.) SHOJI Shuichi Nano Material Infomatics to environmental and bio application. In this vision, nanoelectronics based on nano-carbon materials such as nano

  11. CUT FLOWER VARIETY TRIAL RESULTS, 2006z H. C. Wien, Department of Horticulture

    E-Print Network [OSTI]

    Pawlowski, Wojtek

    a 20-10-10 fertilizer prior to application of black plastic on the soil beds. Prior to planting mulch. The trickle lines were placed between plants 1 and 2, and between plants 3 and 4 across the bed

  12. Engineering Adaptive Web Applications

    E-Print Network [OSTI]

    Dolog, Peter

    Engineering Adaptive Web Applications Von Fakultät für Elektrotechnik und Informatik der Peter Dolog Engineering Adaptive Web Applications Dr. rer. nat. Dissertation 2006 #12;#12;Zusammenfassung: Nutzer von Web-Anwendungen stammen sich aus verschiedensten Nut- zergruppen, die sich in ihrem

  13. Network aware distributed applications

    SciTech Connect (OSTI)

    Agarwal, Deborah [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Tierney, Brian L. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Gunter, Dan [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Lee, Jason [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Johnston, William [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2001-02-04

    Most distributed applications today manage to utilize only a small percentage of the needed and available network bandwidth. Often application developers are not aware of the potential bandwidth of the network, and therefore do not know what to expect. Even when application developers are aware of the specifications of the machines and network links, they have few resources that can help determine why the expected performance was not achieved. What is needed is a ubiquitous and easy-to-use service that provides reliable, accurate, secure, and timely estimates of dynamic network properties. This service will help advise applications on how to make use of the network's increasing bandwidth and capabilities for traffic shaping and engineering. When fully implemented, this service will make building currently unrealizable levels of network awareness into distributed applications a relatively mundane task. For example, a remote data visualization application could choose between sending a wireframe, a pre-rendered image, or a 3-D representation, based on forecasts of CPU availability and power, compression options, and available bandwidth. The same service will provide on-demand performance information so that applications can compare predicted with actual results, and allow detailed queries about the end-to-end path for application and network tuning and debugging.

  14. CHROMATOGRAPHY 6: BIOMEDICAL APPLICATIONS

    E-Print Network [OSTI]

    Miksik, Ivan

    JOURNAL OF CHROMATOGRAPHY 6: BIOMEDICAL APPLICATIONS ELSEVIER Journal of Chromatography B, 656 (1994) 3-27 Review Biomedical applications of capillary electrophoresis Z. Deyl* @,F. Tagliarob, I. Mik of this technique for biomedical analysis. Rather than going into a detailed description of the technical details

  15. Analytical applications for delayed neutrons

    SciTech Connect (OSTI)

    Eccleston, G.W.

    1983-01-01

    Analytical formulations that describe the time dependence of neutron populations in nuclear materials contain delayed-neutron dependent terms. These terms are important because the delayed neutrons, even though their yields in fission are small, permit control of the fission chain reaction process. Analytical applications that use delayed neutrons range from simple problems that can be solved with the point reactor kinetics equations to complex problems that can only be solved with large codes that couple fluid calculations with the neutron dynamics. Reactor safety codes, such as SIMMER, model transients of the entire reactor core using coupled space-time neutronics and comprehensive thermal-fluid dynamics. Nondestructive delayed-neutron assay instruments are designed and modeled using a three-dimensional continuous-energy Monte Carlo code. Calculations on high-burnup spent fuels and other materials that contain a mix of uranium and plutonium isotopes require accurate and complete information on the delayed-neutron periods, yields, and energy spectra. A continuing need exists for delayed-neutron parameters for all the fissioning isotopes.

  16. Development of Ti-Ag-Fe ternary titanium alloy for dental application B.B. Zhang,1

    E-Print Network [OSTI]

    Zheng, Yufeng

    Development of Ti-Ag-Fe ternary titanium alloy for dental application B.B. Zhang,1 B.L. Wang,1 Y, and their feasibility as dental materials has been evaluated by the microstructural examina- tion, mechanical testing suitable for dental applications. VC 2011 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater

  17. Application of electro acoustics for dewatering pharmaceutical sludge

    SciTech Connect (OSTI)

    Golla, P.S.; Johnson, H.W. ) Senthilnathan, P.R. )

    1992-02-01

    Application of electro acoustic principles for dewatering has been developed by Battelle Institute. The Department of Energy, Battelle Institute, and Ashbrook-Simon-Hartley, have jointly developed an Electro Acoustic Dewatering press (EAD press). The EAD press applies a combination of mechanical pressure, electrical current and ultrasonics. This press is utilized after conventional dewatering devices and can remove up to 50% water from filtered sludge cake at a fraction of the cost incurred in existing thermal drying devices. The dominant mechanism of sludge dewatering by EAD press is electro-osmosis due to the application of a direct current field. Electro-osmosis is caused by an electrical double layer of oppositely charged ions formed at the solid liquid interface, which is characterized by zeta potential. The ultrasonic fields help electro-osmosis by consolidation of the filter cake and by release of inaccessible liquid. The EAD press has been tested successfully on a variety of materials including apple pomace, corn gluten, sewage sludge, and coal fines. A three week long full scale trial was conducted successfully at a pharmaceutical industry to determine the application of this technology for dewatering waste activated sludge.

  18. Human Factors and Ergonomics in Manufacturing, Vol. 19 (6) 601621 (2009) C 2009 Wiley Periodicals, Inc.

    E-Print Network [OSTI]

    Kaber, David B.

    2009-01-01

    Human Factors and Ergonomics in Manufacturing, Vol. 19 (6) 601­621 (2009) C 2009 Wiley Periodicals. Correspondence to: David Kaber, The Ergonomics Laboratory, Edward P. Fitts Department of Industrial & Systems

  19. Periodic Metallic Nanostructures as Plasmonic Chemical Sensors Chiara Valsecchi and Alexandre G. Brolo*

    E-Print Network [OSTI]

    Brolo, Alexandre G.

    ;evaluation as chemical sensors and a brief comparison of the pPeriodic Metallic Nanostructures as Plasmonic Chemical Sensors Chiara Valsecchi and Alexandre G generation of low- cost and efficient chemical sensors and biosensors. The extensive variety

  20. Discrete Self-Similarity Of RR Lyrae Stars II. Period Spectrum For A Very Large Sample

    E-Print Network [OSTI]

    R. L. Oldershaw

    2006-06-06

    A recent paper demonstrated a considerable degree of self-similarity between RR Lyrae stars and their atomic scale analogues: excited helium atoms undergoing single-level transition between n = 7 and n = 10. Discrete self-similarity between these fractal analogues was indentified in terms of their masses, radii, oscillation periods, basic morphologies and kinematics. In this second paper on the subject, an extremely large and carefully analyzed sample of RR Lyrae oscillation periods provides further evidence for a unique match between the predicted set of discrete periods, based exclusively on the known helium spectrum and the discrete scaling equations of a fractal cosmological paradigm, and the observed period spectra of RR Lyrae stars.

  1. Volume 90A, number 9 PHYSICS LETTERS 9 August 1982 BISTABILITY, PERIOD DOUBLING BIFURCATIONS AND CHAOS

    E-Print Network [OSTI]

    Glass, Leon

    AND CHAOS IN A PERIODICALLY FORCED OSCILLATOR Rafael PEREZ Instituto de Fisica, Universidad Nacional de Mexico, Mexico City, Mexico and Leon GLASS Department of Physiology, McGill University, 3655 Drummond

  2. Communal Formations: Development of Gendered Identities in Early Twentieth-Century Women’s Periodicals 

    E-Print Network [OSTI]

    Monteiro, Emily Anne Janda

    2013-05-03

    Women’s periodicals at the start of the twentieth-century were not just recorders but also producers of social and cultural change. They can be considered to both represent and construct gender codes, offering readers ...

  3. EIS-0426: Notice of Extension of Public Comment Period for the...

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

    Office is extending the public comment period for the Draft Site-wide Environmental Impact Statement for the Nevada National Security Site (NNSS) and Off-Site Locations in...

  4. Mediterraneità and modernità : architecture and culture during the period of Italian colonization of North Africa

    E-Print Network [OSTI]

    McLaren, Brian L. (Brian Lloyd), 1958-

    2001-01-01

    This dissertation examines the intersection of the modern and the colonial in architecture and culture during the period of Italian colonization of North Africa from 1911 to 1943. Rather than see the colonies as merely a ...

  5. Use and Finance BiAnnual Reporting Form Reporting Period: July 2013 through December 2013

    E-Print Network [OSTI]

    Papalambros, Panos

    Use and Finance BiAnnual Reporting Form Reporting Period: July 2013 through December 2013 $ Other (Professional Fees, Telecommunications, Moving) 538,200$ Other (Finance resources services center will be established for finance and human resources transaction processing activities

  6. Identifying parameters of nonlinear structural dynamic systems using linear time-periodic approximations

    E-Print Network [OSTI]

    Allen, Matthew S.

    Identifying parameters of nonlinear structural dynamic systems using linear time- periodic nonlinearity. 1. Introduction Most dynamical systems behave nonlinearly in the most general scenario. This can point bifurcation [1], in rotor dynamic systems with bearing contact nonlinearities [2], in biomechanics

  7. Modeling laser-induced periodic surface structures: Finite-difference time-domain feedback simulations

    SciTech Connect (OSTI)

    Skolski, J. Z. P., E-mail: j.z.p.skolski@utwente.nl; Vincenc Obona, J. [Materials innovation institute M2i, Faculty of Engineering Technology, Chair of Applied Laser Technology, University of Twente, P.O. Box 217, 7500 AE Enschede (Netherlands); Römer, G. R. B. E.; Huis in 't Veld, A. J. [Faculty of Engineering Technology, Chair of Applied Laser Technology, University of Twente, P.O. Box 217, 7500 AE Enschede (Netherlands)

    2014-03-14

    A model predicting the formation of laser-induced periodic surface structures (LIPSSs) is presented. That is, the finite-difference time domain method is used to study the interaction of electromagnetic fields with rough surfaces. In this approach, the rough surface is modified by “ablation after each laser pulse,” according to the absorbed energy profile, in order to account for inter-pulse feedback mechanisms. LIPSSs with a periodicity significantly smaller than the laser wavelength are found to “grow” either parallel or orthogonal to the laser polarization. The change in orientation and periodicity follow from the model. LIPSSs with a periodicity larger than the wavelength of the laser radiation and complex superimposed LIPSS patterns are also predicted by the model.

  8. Theoretical and Computational Investigation of Periodically Focused Intense Charged-Particle Beams

    SciTech Connect (OSTI)

    Chen, Chiping [Massachusetts Institute of Technology

    2013-06-26

    The purpose of this report is to summarize results of theoretical and computational investigations of periodically focused intense charged-particle beams in parameter regimes relevant to the development of advanced high-brightness, high-power accelerators for high-energy physics research. The breakthroughs and highlights in our research in the period from April 1, 2010 to March 30, 2013 were: a) Theory and simulation of adiabatic thermal Child-Langmuir flow; b) Particle-in-cell simulations of adiabatic thermal beams in periodic solenoidal focusing field; c)Dynamics of charged particles in an adiabatic thermal beam equilibrium in a periodic solenoidal focusing field; d) Training of undergraduate researchers and graduate student in accelerator and beam physics. A brief introduction and summary is presented. Detailed descriptions of research results are provided in an appendix of publications at the end of the report.

  9. Approximations to wave propagation through doubly-periodic arrays of scatterers

    E-Print Network [OSTI]

    periodic media in many physical contexts that include acoustics, elasticity, electromagnetic theory fluid. The fundamental assumptions behind these approximations are that kL 1 and a/L 1 (and hence ka 1

  10. Microsoft Word - BWCS Scorecard Third period FY 2014 Mar 9 2015...

    Office of Environmental Management (EM)

    by the material processed fee rate for the period, which happens to be 67Metric Ton. BWCS processed 22,596 MT of DUF 6 . The fee associated with this is 1,513,932. The Total...

  11. Quasi-periodic wiggles of microwave zebra structures in a solar flare

    E-Print Network [OSTI]

    Yu, Sijie; Selzer, L A; Tan, Baolin; Yan, Yihua

    2013-01-01

    Quasi-periodic wiggles of microwave zebra pattern structures with period range from about 0.5 s to 1.5 s are found in a X-class solar flare on 2006 December 13 at the 2.6-3.8 GHz with the Chinese Solar Broadband Radio Spectrometer (SBRS/Huairou). Periodogram and correlation analysis show that the wiggles have two-three significant periodicities and almost in phase between stripes at different frequency. The Alfven speed estimated from the zebra pattern structures is about 700 Km/s. We obtain the spatial size of the waveguiding plasma structure to be about 1 Mm with the detected period of about 1 s. It suggests the ZP wiggles can be associated with the fast mag- netoacoustic oscillations in the flaring active region. The lack of a significant phase shift between wiggles of different stripes suggests that the ZP wiggles are caused by a standing sausage oscillation.

  12. 1D, 2D, and 3D Periodic Structures: Electromagnetic Characterization, Design, and Measurement

    E-Print Network [OSTI]

    Brockett, Timothy John

    2013-01-01

    such as solar cell efficiency and microwave absorber [4].very similar to solar cell arrays is microwave absorber usedsolar cell efficiency. mizing periodic electromagnetic structures at RF and microwave

  13. Paleocene sea level movements with a 430,000 year quasi-periodic...

    Office of Scientific and Technical Information (OSTI)

    Sea level movements with quasi-periodicity of 430,000 years are identified in the marine sedimentary units of the Eastern Gulf Coastal Plain of Mississippi, Alabama and...

  14. The Earth-Moon CR3BP: A full Atlas of low-energy fast periodic transfer orbits

    E-Print Network [OSTI]

    Alejandro M. Leiva; Carlos B. Briozzo

    2006-12-14

    In the framework of the planar CR3BP for mass parameter mu=0.0121505, corresponding to the Earth-Moon system, we identify and describe 80 families of periodic orbits encircling both the Earth and the Moon ("transfer" orbits). All the orbits in these families have very low energies, most of them corresponding to values of the Jacobi constant C for which the Hill surface is closed at the Lagrangian point L2. All of these orbits have also short period T, generally under six months. Most of the families are composed of orbits that are asymmetric with respect to the Earth-Moon axis. The main results presented for each family are: (i) the characteristic curves T(h), y(h), v_y(h), and v_x(h) on the Poincare section Sigma_1={x=0.836915310,y,v_x>0,v_y} normal to the Earth-Moon axis at the Lagrangian point L1, parameterized by their energy h=-C/2 in the synodic coordinate system; (ii) the stability parameter along each family; (iii) the intersections x_i(h) of the orbits with the Earth-Moon axis, on the Poincare section Sigma_2={x,y=0,v_x},v_y>0}; (iv) plots of some selected orbits and details of their circumlunar region; and (v) numerical data for the intersection of an orbit with Sigma_1 at a reference value of h. Some possible extensions and applications of this work are also discussed.

  15. Comparison of quantization of charge transport in periodic and open pumps

    E-Print Network [OSTI]

    Gian Michele Graf; Gregorio Ortelli

    2007-09-19

    We compare the charges transported in two systems, a spatially periodic and an open quantum pump, both depending periodically and adiabatically on time. The charge transported in a cycle was computed by Thouless, respectively by Buttiker et al. in the two cases. We show that the results agree in the limit where the two physical situations become the same, i.e., that of a large open pump.

  16. Demonstration of sawtooth period control with EC waves in KSTAR plasma

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

    Jeong, J. H.; Bae, Y. S.; Joung, M.; Kim, D.; Goodman, T. P.; Sauter, O.; Sakamoto, K.; Kajiwara, K.; Oda, Y.; Kwak, J. G.; et al

    2015-03-12

    The sawtooth period control in tokamak is important issue in recent years because the sawtooth crash can trigger TM/NTM instabilities and drive plasmas unstable. The control of sawtooth period by the modification of local current profile near the q=1 surface using ECCD has been demonstrated in a number of tokamaks [1, 2] including KSTAR. As a result, developing techniques to control the sawtooth period as a way of controlling the onset of NTM has been an important area of research in recent years [3]. In 2012 KSTAR plasma campaign, the sawtooth period control is carried out by the different depositionmore »position of EC waves across the q=1 surface. The sawtooth period is shortened by on-axis co-ECCD (destabilization), and the stabilization of the sawtooth is also observed by off-axis co-ECCD at outside q=1 surface. In 2013 KSTAR plasma campaign, the sawtooth locking experiment with periodic forcing of 170 GHz EC wave is carried out to control the sawtooth period. The optimal target position which lengthens the sawtooth period is investigated by performing a scan of EC beam deposition position nearby q=1 surface at the toroidal magnetic field of 2.9 T and plasma current of 0.7 MA. The sawtooth locking by the modulated EC beam is successfully demonstrated as in [3-5] with the scan of modulation-frequency and duty-ratio at the low beta (?N~0.5) plasma. In this paper, the sawteeth behavior by the location of EC beam and the preliminary result of the sawtooth locking experiments in KSTAR will be presented.« less

  17. The discrete spectrum of Jacobi matrix related to recurrence relations with periodic coefficients

    E-Print Network [OSTI]

    V. V. Borzov; E. V. Damaskinsky

    2015-02-27

    In this note we investigate the discrete spectrum of Jacobi matrix corresponding to polynomials defined by recurrence relations with periodic coefficients. As examples we consider a)the case when period $N$ of coefficients of recurrence relations equals three (as a particular case we consider "parametric" Chebyshev polynomials introduced by authors early); b)the elementary $N$-symmetrical Chebyshev polynomials ($N=3,4,5$), that was introduced by authors in the study of the "composite model of generalized oscillator".

  18. On the spin period distribution in Be/X-ray binaries

    SciTech Connect (OSTI)

    Cheng, Z.-Q.; Shao, Y.; Li, X.-D., E-mail: lixd@nju.edu.cn [Department of Astronomy, Nanjing University, Nanjing 210093 (China)

    2014-05-10

    There is a remarkable correlation between the spin periods of the accreting neutron stars (NSs) in Be/X-ray binaries (BeXBs) and their orbital periods. Recently, Knigge et al. showed that the distribution of the spin periods contains two distinct subpopulations peaked at ?10 s and ?200 s, respectively, and suggested that they may be related to two types of supernovae for the formation of the NSs, i.e., core-collapse and electron-capture supernovae. Here we propose that the bimodal spin period distribution is likely to be ascribed to different accretion modes of the NSs in BeXBs. When the NS tends to capture material from the warped, outer part of the Be star disk and experiences giant outbursts, a radiatively cooling dominated disk is formed around the NS, which spins up the NS and is responsible for the short-period subpopulation. In BeXBs that are dominated by normal outbursts or are persistent, the accretion flow is advection-dominated or quasi-spherical. The spin-up process is accordingly inefficient, leading to longer periods of the neuron stars. The potential relation between the subpopulations and the supernova mechanism is also discussed.

  19. Radiotherapy in pediatric medulloblastoma: Quality assessment of Pediatric Oncology Group Trial 9031

    SciTech Connect (OSTI)

    Miralbell, Raymond [Quality Assurance Review Committee, Providence, RI (United States) and Department of Radiation Oncology, University Hospital, Geneva (Switzerland)]. E-mail: Raymond.Miralbell@hcuge.ch; Fitzgerald, T.J. [Quality Assurance Review Committee, Providence, RI (United States); Laurie, Fran [Quality Assurance Review Committee, Providence, RI (United States); Kessel, Sandy [Quality Assurance Review Committee, Providence, RI (United States); Glicksman, Arvin [Quality Assurance Review Committee, Providence, RI (United States); Friedman, Henry S. [Pediatric Neuro-Oncology Division, Duke South Hospital, Durham, NC (United States); Urie, Marcia [Quality Assurance Review Committee, Providence, RI (United States); Kepner, James L. [Roswell Park Cancer Institute, Buffalo, NY (United States); Zhou Tianni [Operations Center, Children's Oncology Group, Arcadia, CA (United States); Chen Zhengjia [Operations Center, Children's Oncology Group, Arcadia, CA (United States); Barnes, Pat [Department of Radiology, Stanford University, Stanford, CA (United States); Kun, Larry [Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN (United States); Tarbell, Nancy J. [Department of Radiation Oncology, Massachusetts General Hospital, Boston, MA (United States)

    2006-04-01

    Purpose: To evaluate the potential influence of radiotherapy quality on survival in high-risk pediatric medulloblastoma patients. Methods and Materials: Trial 9031 of the Pediatric Oncology Group (POG) aimed to study the relative benefit of cisplatin and etoposide randomization of high-risk patients with medulloblastoma to preradiotherapy vs. postradiotherapy treatment. Two-hundred and ten patients were treated according to protocol guidelines and were eligible for the present analysis. Treatment volume (whole brain, spine, posterior fossa, and primary tumor bed) and dose prescription deviations were assessed for each patient. An analysis of first site of failure was undertaken. Event-free and overall survival rates were calculated. A log-rank test was used to determine the significance of potential survival differences between patients with and without major deviations in the radiotherapy procedure. Results: Of 160 patients who were fully evaluable for all treatment quality parameters, 91 (57%) had 1 or more major deviations in their treatment schedule. Major deviations by treatment site were brain (26%), spinal (7%), posterior fossa (40%), and primary tumor bed (17%). Major treatment volume or total dose deviations did not significantly influence overall and event-free survival. Conclusions: Despite major treatment deviations in more than half of fully evaluable patients, underdosage or treatment volume misses were not associated with a worse event-free or overall survival.

  20. Clinical Trials of a Urethral Dose Measurement System in Brachytherapy Using Scintillation Detectors

    SciTech Connect (OSTI)

    Suchowerska, Natalka, E-mail: natalka@email.cs.nsw.gov.a [Radiation Oncology, Royal Prince Alfred Hospital, New South Wales (Australia); School of Physics, University of Sydney, New South Wales (Australia); Jackson, Michael [Radiation Oncology, Prince of Wales Hospital, New South Wales (Australia); Department of Medicine, University of Sydney, New South Wales (Australia); Lambert, Jamil; Yin, Yong Bai [School of Physics, University of Sydney, New South Wales (Australia); Hruby, George [Radiation Oncology, Royal Prince Alfred Hospital, New South Wales (Australia); Department of Medicine, University of Sydney, New South Wales (Australia); McKenzie, David R. [School of Physics, University of Sydney, New South Wales (Australia)

    2011-02-01

    Purpose: To report on the clinical feasibility of a novel scintillation detector system with fiberoptic readout that measures the urethral dose during high-dose-rate brachytherapy treatment of the prostate. Methods and Materials: The clinical trial enrolled 24 patients receiving high-dose-rate brachytherapy treatment to the prostate. After the first 14 patients, three improvements were made to the dosimeter system design to improve clinical reliability: a dosimeter self-checking facility; a radiopaque marker to determine the position of the dosimeter, and a more robust optical extension fiber. Results: Improvements to the system design allowed for accurate dose measurements to be made in vivo. A maximum measured dose departure of 9% from the calculated dose was observed after dosimeter design improvements. Conclusions: Departures of the measured from the calculated dose, after improvements to the dosimetry system, arise primarily from small changes in patient anatomy. Therefore, we recommend that patient response be correlated with the measured in vivo dose rather than with the calculated dose.