National Library of Energy BETA

Sample records for wide spread multiple

  1. Spectral phase encoded time spread optical code division multiple

    E-Print Network [OSTI]

    Yoo, S. J. Ben

    -CDMA, efficient and compact W-CDMA chip develop- ment allowed rapid market-driven transition from the conventionalSpectral phase encoded time spread optical code division multiple access technology for next and summarize the progress of the spectral phase encoded time spreading (SPECTS) optical code division multiple

  2. Signature of wide-spread clumping in B supergiant winds

    E-Print Network [OSTI]

    Prinja, Raman

    2010-01-01

    We seek to establish additional observational signatures of the effects of clumping in OB star winds. The action of clumping on strategic wind-formed spectral lines is tested to steer the development of models for clumped winds and thus improve the reliability of mass-loss determinations for massive stars.The SiIV 1400 resonance line doublets of B0 to B5 supergiants are analysed using empirical line-synthesis models. The focus is on decoding information on wind clumping from measurements of ratios of the radial optical depths (tau_(rad)(w)) of the red and blue components of the SiIV doublet. We exploit in particular the fact that the two doublet components are decoupled and formed independently for targets with relatively low wind terminal velocities. Line-synthesis analyses reveal that the mean ratio of tau_(rad)(w) of the blue to red SiIV components are rarely close to the canonical value of ~ 2 (expected from atomic constants), and spread instead over a range of values between ~1 and 2. These results are i...

  3. Industrial Wireless Sensors: A User's Perspective on the Impact of Standards on Wide-spread Deployment

    SciTech Connect (OSTI)

    Taft, Cyrus W. [Taft Engineering, Inc.] [Taft Engineering, Inc.; Manges, Wayne W [ORNL] [ORNL; Sorge, John N [Southern Company Services, Inc.] [Southern Company Services, Inc.

    2012-01-01

    The role of wireless sensing technologies in industrial instrumentation will undoubtedly become more important in the years ahead. . Deployment of such instrumentation in an industrial setting with its heightened security and robustness criteria hinges on user acceptance of verified performance as well as meeting cost requirements. Today, industrial users face many choices when specifying a wireless sensor network, including radio performance, battery life, interoperability, security, and standards compliance. The potential market for industrial wireless sensors is literally millions of wireless instruments and it is imperative that accurate information for applying the technology to real-world applications be available to the end-user so that they can make informed deployment decisions. The majority of industrial wireless automation designs now being deployed or being considered for deployment are based on three different standards . The HART Communications Foundation s WirelessHART (IEC 62591), the International Society of Automation s ISA100.11a, and the offering from the Industrial Wireless Alliance of China known as WIA-PA (IEC 62601). Aside from these industrial automation standards, users must also be cognizant of the underlying wireless network standards IEEE 802.11, IEEE 802.15.4, and IEEE 802.15.3a and their interactions with the three principal industrial automation protocols mentioned previously. The crucial questions being asked by end users revolve around sensor network performance, interoperability, reliability, and security. This paper will discuss potential wireless sensor applications in power plants, barriers to the acceptance of wireless technology, concerns related to standards, and provide an end user prospective on the issues affecting wide-spread deployment of wireless sensors. Finally, the authors conclude with a discussion of a recommended path forward including how standards organizations can better facilitate end user decision making and how end users can locate and use objective information for decision making.

  4. Autonomous routing algorithms for networks with wide-spread failures : a case for differential backlog routing

    E-Print Network [OSTI]

    Khan, Wajahat Faheem

    2008-01-01

    We study the performance of a differential backlog routing algorithm in a network with random failures. Differential Backlog routing is a novel routing algorithm where packets are routed through multiple paths to their ...

  5. A Tournament Approach to the Detection of Multiple Associations in Genome-wide Studies

    E-Print Network [OSTI]

    Chen, Jiahua

    A Tournament Approach to the Detection of Multiple Associations in Genome-wide Studies of Waterloo 3 Genome Institute of Singapore Correspondence Author: Zehua Chen Department of Statistics@nus.edu.sg 1 #12;Abstract Genome-wide association studies become feasible and promising with the availability

  6. Wide-Bandwidth, Tunable, Multiple-Pulse-Width Optical Delays Using Slow Light in Cesium Vapor

    E-Print Network [OSTI]

    Boyd, Robert W.

    Wide-Bandwidth, Tunable, Multiple-Pulse-Width Optical Delays Using Slow Light in Cesium Vapor Ryan) We demonstrate an all-optical delay line in hot cesium vapor that tunably delays 275 ps input pulses to 80 pulse widths by making use of a double absorption reso- nance in cesium. Furthermore, we show

  7. Effective spreading from multiple leaders identified by percolation in social networks

    E-Print Network [OSTI]

    Ji, Shenggong; Yeung, Chi Ho; Hu, Yanqing

    2015-01-01

    Social networks constitute a new platform for information propagation, but its success is crucially dependent on the choice of spreaders who initiate the spreading of information. In this paper, we remove edges in a network at random and the network segments into isolated clusters. The most important nodes in each cluster then form a group of influential spreaders, such that news propagating from them would lead to an extensive coverage and minimal redundancy. The method well utilizes the similarities between the pre-percolated state and the coverage of information propagation in each social cluster to obtain a set of distributed and coordinated spreaders. Our tests on the Facebook networks show that this method outperforms conventional methods based on centrality. The suggested way of identifying influential spreaders thus sheds light on a new paradigm of information propagation on social networks.

  8. Modeling the Cumulative Genetic Risk for Multiple Sclerosis from Genome Wide Association Data

    E-Print Network [OSTI]

    2011-01-01

    antigen; LD: linkage disequilibrium; MS: multiple sclerosis;MSSS: Multiple Sclerosis Severity Score; ROC: receiverDS: The causal cascade to multiple sclerosis: a model for MS

  9. A "Candidate-Interactome" Aggregate Analysis of Genome-Wide Association Data in Multiple Sclerosis

    E-Print Network [OSTI]

    2013-01-01

    Vukusic S (2001) Vaccines in multiple sclerosis study group.risk of relapses in multiple sclerosis. N Engl J Med; 344:and the risk of multiple sclerosis N Engl J Med 344: 327–

  10. Hybrid spread spectrum radio system

    DOE Patents [OSTI]

    Smith, Stephen F. (London, TN) [London, TN; Dress, William B. (Camas, WA) [Camas, WA

    2010-02-09

    Systems and methods are described for hybrid spread spectrum radio systems. A method, includes receiving a hybrid spread spectrum signal including: fast frequency hopping demodulating and direct sequence demodulating a direct sequence spread spectrum signal, wherein multiple frequency hops occur within a single data-bit time and each bit is represented by chip transmissions at multiple frequencies.

  11. The performance of a multiple-disk centrifugal pump as an artificial ventricle over a wide range of operating parameters 

    E-Print Network [OSTI]

    Sidhu, Amrita Singh

    1993-01-01

    The performance of a multiple-disk centrifugal pump based on the Tesla Turbine design is tested over a wide range of operating conditions. 'This pump is tested on a mock circulatory loop (with a blood analog) approved by the NIH. This valveless...

  12. Dynamic collision reduction protocol for ultra-wide bandwidth multiple access networks

    E-Print Network [OSTI]

    Tomezak, Gregory John, 1980-

    2004-01-01

    In this thesis, we provide a cross-layer analysis of the throughput of the dynamic collision reduction (DCR) protocol, a multiple access protocol that requires frame synchronization. At the physical-layer, we develop the ...

  13. Processing of multiple-receiver spaceborne arrays for wide-area SAR

    E-Print Network [OSTI]

    Stiles, James Marion; Rajakrishna, D.; Lin, S. C.; Goodman, N. A.

    2002-04-01

    in multiple modes. The disadvantage is that the spatial samples provided by such a constellation will be sparse and irregularly spaced; consequently, traditional matched filtering produces unsatisfactory results. We investigate SAR performance and processing...

  14. Hybrid spread spectrum radio system

    DOE Patents [OSTI]

    Smith, Stephen F. (London, TN); Dress, William B. (Camas, WA)

    2010-02-02

    Systems and methods are described for hybrid spread spectrum radio systems. A method includes modulating a signal by utilizing a subset of bits from a pseudo-random code generator to control an amplification circuit that provides a gain to the signal. Another method includes: modulating a signal by utilizing a subset of bits from a pseudo-random code generator to control a fast hopping frequency synthesizer; and fast frequency hopping the signal with the fast hopping frequency synthesizer, wherein multiple frequency hops occur within a single data-bit time.

  15. Approximations for Bit Error Probabilities in SSMA Communication Systems Using Spreading

    E-Print Network [OSTI]

    Keller, Gerhard

    Approximations for Bit Error Probabilities in SSMA Communication Systems Using Spreading Sequences@mi.uni-erlangen.de Abstract-- In previous research, we considered SSMA (spread spectrum multiple access) communication systems of spread spectrum multiple access (SSMA) communication systems, the standard Gaussian approximation (SGA

  16. strawberry-spread

    E-Print Network [OSTI]

    Date: 17 May 93 02:15:00 EDT From: KEVWIL@delphi.com ---------- Recipe via Meal-Master (tm) v7.04 Title: FRESH STRAWBERRY SPREAD Categories: ...

  17. Bearing estimation techniques for improved performance spread spectrum receivers 

    E-Print Network [OSTI]

    Thompson, John S

    The main topic of this thesis is the use of bearing estimation techniques combined with multiple antenna elements for spread spectrum receivers. The motivation behind this work is twofold: firstly, this type of receiver structure may offer...

  18. Modeling the effect of native and laser-induced states on the dielectric breakdown of wide band gap optical materials by multiple subpicosecond laser pulses

    SciTech Connect (OSTI)

    Emmert, Luke A.; Mero, Mark; Rudolph, Wolfgang [Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131 (United States)

    2010-08-15

    A model for the multiple-pulse laser-induced breakdown behavior of dielectrics is presented. It is based on a critical conduction band (CB) electron density leading to dielectric breakdown. The evolution of the CB electron density during the pulse train is calculated using rate equations involving transitions between band and mid-gap states (native and laser-induced). Using realistic estimations for the trap density and ionization cross-section, the model is able to reproduce the experimentally observed drop in the multiple-pulse damage threshold relative to the single-pulse value, as long as the CB electron density is controlled primarily by avalanche ionization seeded by multiphoton ionization of the traps and the valence band. The model shows that at long pulse duration, the breakdown threshold becomes more sensitive to presence of traps close (within one photon energy) to the CB. The effect of native and laser-induced defects can be distinguished by their saturation behavior. Finally, measurements of the multiple-pulse damage threshold of hafnium oxide films are used to illustrate the application of the model.

  19. Rifts in Spreading Wax Layers

    E-Print Network [OSTI]

    Rolf Ragnarsson; J. Lewis Ford; Christian D. Santangelo; Eberhard Bodenschatz

    1995-10-19

    We report experimental results on the rift formation between two freezing wax plates. The plates were pulled apart with constant velocity, while floating on the melt, in a way akin to the tectonic plates of the earth's crust. At slow spreading rates, a rift, initially perpendicular to the spreading direction, was found to be stable, while above a critical spreading rate a "spiky" rift with fracture zones almost parallel to the spreading direction developed. At yet higher spreading rates a second transition from the spiky rift to a zig-zag pattern occurred. In this regime the rift can be characterized by a single angle which was found to be dependent on the spreading rate. We show that the oblique spreading angles agree with a simple geometrical model. The coarsening of the zig-zag pattern over time and the three-dimensional structure of the solidified crust are also discussed.

  20. Using a Bull Call Spread 

    E-Print Network [OSTI]

    Bevers, Stan; Amosson, Stephen H.; Waller, Mark L.; Dhuyvetter, Kevin C.

    2008-10-07

    The Bull Call Spread can be used to hedge against or to benefit from a rising market. The user buys a call option at a particular strike price and sells a call option at a higher strike price. Margin requirements, advantages and disadvantages...

  1. Using a Bear Put Spread 

    E-Print Network [OSTI]

    Bevers, Stan; Amosson, Stephen H.; Waller, Mark L.; Dhuyvetter, Kevin C.

    2008-10-07

    spread. In this example, assume the current Chicago Board of Trade December Corn contract is trad- ing at $6.00 per bushel. The associated December put option premiums are listed in Table 1. The producer begins the strategy by buying a put op- tion... near the money, in this case a $6.00 put op- tion for $0.90 per bushel ($4,500 per 5,000-bushel contract). At the same time, he also writes (sells) a put option with a strike price below the put option. In our example, he writes a $5.00 put option...

  2. Determining System Parameters for Optimal Performance of Hybrid DS/FFH Spread-Spectrum

    SciTech Connect (OSTI)

    Ma, Xiao [ORNL; Olama, Mohammed M [ORNL; Kuruganti, Phani Teja [ORNL; Smith, Stephen Fulton [ORNL; Djouadi, Seddik M [ORNL

    2012-01-01

    In recent years there has been great interest in using hybrid spread-spectrum (HSS) techniques for commercial applications, particularly in the Smart Grid, in addition to their use in military communications because they accommodate high data rates with high link integrity, even in the presence of significant multipath effects and interfering signals. A highly useful form of this transmission technique for many types of command, control, and sensing applications is the specific code-related combination of standard direct sequence (DS) modulation with "fast" frequency hopping (FFH), denoted hybrid DS/FFH, wherein multiple frequency hops occur within a single data-bit time. In this paper, an optimization problem is formulated that maximizes the DS/FFH communication system performance in terms of probability of bit error and solves for the system design parameters. The objective function is non-convex and can be solved by applying the Karush-Kuhn-Tucker conditions. System design parameters of interest are the length of the DS code sequence, number of frequency hopping channels, number of channels corrupted by wide-band jamming, and number of hops per bit. The proposed formulation takes into account the effects from wide-band and partial-band jamming, multi-user interference and/or varying degrees of Rayleigh and Rician multipath fading. Numerical results are presented to demonstrate the method s viability.

  3. SAW correlator spread spectrum receiver

    DOE Patents [OSTI]

    Brocato, Robert W

    2014-04-01

    A surface acoustic wave (SAW) correlator spread-spectrum (SS) receiver is disclosed which utilizes a first demodulation stage with a chip length n and a second demodulation stage with a chip length m to decode a transmitted SS signal having a code length l=n.times.m which can be very long (e.g. up to 2000 chips or more). The first demodulation stage utilizes a pair of SAW correlators which demodulate the SS signal to generate an appropriate code sequence at an intermediate frequency which can then be fed into the second demodulation stage which can be formed from another SAW correlator, or by a digital correlator. A compound SAW correlator comprising two input transducers and a single output transducer is also disclosed which can be used to form the SAW correlator SS receiver, or for use in processing long code length signals.

  4. Damage spreading and coupling in Markov chains

    E-Print Network [OSTI]

    Etienne P. Bernard; Cédric Chanal; Werner Krauth

    2011-06-23

    In this paper, we relate the coupling of Markov chains, at the basis of perfect sampling methods, with damage spreading, which captures the chaotic nature of stochastic dynamics. For two-dimensional spin glasses and hard spheres we point out that the obstacle to the application of perfect-sampling schemes is posed by damage spreading rather than by the survey problem of the entire configuration space. We find dynamical damage-spreading transitions deeply inside the paramagnetic and liquid phases, and show that critical values of the transition temperatures and densities depend on the coupling scheme. We discuss our findings in the light of a classic proof that for arbitrary Monte Carlo algorithms damage spreading can be avoided through non-Markovian coupling schemes.

  5. A new theory for interface spreading 

    E-Print Network [OSTI]

    Puthran, Hansraj Nagappa

    1994-01-01

    A new theory for interface spreading during sedimentation of monodisperse suspensions of spheres has been developed. Employing no adjustable parameters, it compares well with new data obtained using magnetic resonance imaging.

  6. Modeling of LNG Pool Spreading and Vaporization 

    E-Print Network [OSTI]

    Basha, Omar 1988-

    2012-11-20

    In this work, a source term model for estimating the rate of spreading and vaporization of LNG on land and sea is introduced. The model takes into account the composition changes of the boiling mixture, the varying thermodynamic properties due...

  7. Spreading of oil spilled under ice

    SciTech Connect (OSTI)

    Yapa, P.D.; Chowdhury, T. )

    1990-12-01

    A new set of equations is presented to describe the process of oil spreading under ice in clam waters. These equations consider the gravity (buoyancy)-inertia phase, the gravity (buoyancy)-viscous phase, and the termination of spreading during the buoyancy-surface-tension phase. The derivation considers both the constant discharge mode and the constant volume mode. Therefore, a complete description of the spreading phenomena from the time of initial spill to the termination of spreading is presented. Laboratory experiments were conducted using both real ice covers in a cold room and artificial ice covers. The experiments included different ice-cover roughnesses from smooth to rough, oils of different viscosities, and a variety of discharge conditions. The experimental data show close agreement with the theory. These equations can be used during cleanup or environmental impact assessment to estimate the area of an oil slick with respect to time.

  8. Doppler Spread Estimation for Wireless OFDM Tevfik Yucek, Ramy M. A. Tannious, and Huseyin Arslan

    E-Print Network [OSTI]

    Arslan, Hüseyin

    and signal-to-noise ratio (SNR) values in Rayleigh fading channels. I. INTRODUCTION OFDM has been applied and licensed-exempt bands, various delay spreads, asymmetric traffic loads in downlink and uplink and wide considerably within one OFDM symbol because of high MSS mobility, orthogonality between subcarriers is lost

  9. Anisotropic geometrical-spreading correction for wide-azimuth P-wave reflections

    E-Print Network [OSTI]

    Tsvankin, Ilya

    anisotropy in the overburden, which should cause distortions in the azimuthal AVO attributes. This case study . To estimate the moveout parameters, we apply a 3D nonhyperbolic semblance algorithm of Vasconcelos and Ts for characterization of fractured reservoirs and li- thology discrimination Mallick et al., 1998; Grechka and Tsvankin

  10. Wide Blue Sky

    E-Print Network [OSTI]

    Collins, Caroline Imani

    2011-01-01

    dressed neatly in a dark blue dress, its high neck trimmedIt was covered in a light blue fabric embellished with softOF CALIFORNIA RIVERSIDE Wide Blue Sky A Thesis submitted in

  11. Island Wide Management Corporation

    Office of Legacy Management (LM)

    9 1986 Island Wide Management Corporation 3000 Marcus Avenue Lake Success, New York 11042 Dear Sir or Madam: I am sending you this letter and the enclosed information as you have...

  12. The Central Basin Spreading Center in the Philippine Sea: Structure of an extinct spreading center and implications

    E-Print Network [OSTI]

    Okino, Kyoko

    The Central Basin Spreading Center in the Philippine Sea: Structure of an extinct spreading center of the West Philippine Basin (WPB), display along-axis variations of spreading style. We have described, seafloor morphology, extinct spreading center, Philippine Sea Citation: Okino, K., and K. Fujioka

  13. Events Determine Spreading Patterns: Information Transmission via Internal and External Influences on Social Networks

    E-Print Network [OSTI]

    Liu, Chuang; Zhang, Zi-Ke; Sun, Gui-Quan; Hui, Pak Ming

    2015-01-01

    Recently, information transmission models motivated by the classical epidemic propagation, have been applied to a wide-range of social systems, generally assume that information mainly transmits among individuals via peer-to-peer interactions on social networks. In this paper, we consider one more approach for users to get information: the out-of-social-network influence. Empirical analyses of eight typical events' diffusion on a very large micro-blogging system, \\emph{Sina Weibo}, show that the external influence has significant impact on information spreading along with social activities. In addition, we propose a theoretical model to interpret the spreading process via both internal and external channels, considering three essential properties: (i) memory effect; (ii) role of spreaders; and (iii) non-redundancy of contacts. Experimental and mathematical results indicate that the information indeed spreads much quicker and broader with mutual effects of the internal and external influences. More importantly...

  14. ORIGINAL ARTICLE Genome-Wide Linkage Analysis of Multiple Measures

    E-Print Network [OSTI]

    Nyholt, Dale R.

    . Indi- viduals with high neuroti- cism scores are characterized by emotional instability, low self-esteem, and feelings of anxiety, depression, and guilt.1 Neuroti- cism scores are found to be high in those to be reciprocal. Pro- spective studies demonstrate that neuroti- cism or neuroticism-like traits predict fu- ture

  15. Fast Fourier Transform (FFT) is one of the most widely used algorithms in digital signal processing. It is used in

    E-Print Network [OSTI]

    Aboelaze, Mokhtar

    ) which is the basis for Multi Carrier Code Division Multiple access (MC-CDMA), and its di- rect spread was used in 3- D induction well logging probelm where it could be used in characterization of oil

  16. Multicarrier orthogonal spread-spectrum (MOSS) data communications

    DOE Patents [OSTI]

    Smith, Stephen F. (London, TN); Dress, William B. (Camas, WA)

    2008-01-01

    Systems and methods are described for multicarrier orthogonal spread-spectrum (MOSS) data communication. A method includes individually spread-spectrum modulating at least two of a set of orthogonal frequency division multiplexed carriers, wherein the resulting individually spread-spectrum modulated at least two of a set of orthogonal frequency division multiplexed carriers are substantially mutually orthogonal with respect to both frequency division multiplexing and spread-spectrum modulation.

  17. COMPARING SIMULATION METHODS FOR FIRE SPREADING ACROSS A FUEL BED

    E-Print Network [OSTI]

    Wainer, Gabriel

    choice to solve the problem. Diffusion processes (oil spills, fire spread, insect infestation, etcCOMPARING SIMULATION METHODS FOR FIRE SPREADING ACROSS A FUEL BED Alexandre Muzy Computer Modeling computer simulation of a semi-physical fire spread model. Forest fire is a com- plex phenomenon, which

  18. Spreading of energy in the Ding-Dong model

    SciTech Connect (OSTI)

    Roy, S.; Pikovsky, A.

    2012-06-15

    We study the properties of energy spreading in a lattice of elastically colliding harmonic oscillators (Ding-Dong model). We demonstrate that in the regular lattice the spreading from a localized initial state is mediated by compactons and chaotic breathers. In a disordered lattice, the compactons do not exist, and the spreading eventually stops, resulting in a finite configuration with a few chaotic spots.

  19. Increasing jet entrainment, mixing and spreading

    DOE Patents [OSTI]

    Farrington, R.B.

    1994-08-16

    A free jet of air is disturbed at a frequency that substantially matches natural turbulences in the free jet to increase the entrainment, mixing, and spreading of air by the free jet, for example in a room or other enclosure. The disturbances are created by pulsing the flow of air that creates the free jet at the desired frequency. Such pulsing of the flow of air can be accomplished by sequentially occluding and opening a duct that confines and directs the flow of air, such as by rotating a disk on an axis transverse to the flow of air in the duct. 11 figs.

  20. Increasing jet entrainment, mixing and spreading

    DOE Patents [OSTI]

    Farrington, Robert B. (Wheatridge, CO)

    1994-01-01

    A free jet of air is disturbed at a frequency that substantially matches natural turbulences in the free jet to increase the entrainment, mixing, and spreading of air by the free jet, for example in a room or other enclosure. The disturbances are created by pulsing the flow of air that creates the free jet at the desired frequency. Such pulsing of the flow of air can be accomplished by sequentially occluding and opening a duct that confines and directs the flow of air, such as by rotating a disk on an axis transverse to the flow of air in the duct.

  1. Wavepacket of the Universe and its spreading

    E-Print Network [OSTI]

    Marek Czachor; Andrzej Posiewnik

    2015-10-16

    Wavepackets in quantum mechanics spread and the Universe in cosmology expands. We discuss a formalism where the two effects can be unified. The basic assumption is that the Universe is determined by a unitarily evolving wavepacket defined on space-time. Space-time is static but the Universe is dynamic. Spreading analogous to expansion known from observational cosmology is obtained if one regards time evolution as a discrete process with probabilities of jumps determined by a variational principle employing Kolmogorov-Nagumo-R\\'enyi averages. The choice of the R\\'enyi calculus implies that the form of the Universe involves an implicit fractal structure. The formalism automatically leads to two types of "time" parameters: $\\tau$, with dimension of $x^0$, and dimensionless $\\varepsilon=\\ln \\epsilon_\\tau$, related to the form of diffeomorphism that defines the dynamics. There is no preferred time foliation, but effectively the dynamics leads to asymptotic concentration of the Universe on spacelike surfaces that propagate in space-time. The analysis is performed explicitly in $1+1$ dimensions, but the unitary evolution operator is brought to a form that makes generalizations to other dimensions and other fields quite natural.

  2. Analysis, Optimization, and Implementation of a Hybrid DS/FFH Spread-Spectrum Technique for Smart Grid Communications

    SciTech Connect (OSTI)

    Olama, Mohammed M; Ma, Xiao; Killough, Stephen M; Kuruganti, Teja; Smith, Stephen Fulton; Djouadi, Seddik M

    2015-01-01

    In recent years, there has been great interest in using hybrid spread-spectrum (HSS) techniques for commercial applications, particularly in the Smart Grid, in addition to their inherent uses in military communications. This is because HSS can accommodate high data rates with high link integrity, even in the presence of significant multipath effects and interfering signals. A highly useful form of this transmission technique for many types of command, control, and sensing applications is the specific code-related combination of standard direct sequence modulation with fast frequency hopping, denoted hybrid DS/FFH, wherein multiple frequency hops occur within a single data-bit time. In this paper, error-probability analyses are performed for a hybrid DS/FFH system over standard Gaussian and fading-type channels, progressively including the effects from wide- and partial-band jamming, multi-user interference, and varying degrees of Rayleigh and Rician fading. In addition, an optimization approach is formulated that minimizes the bit-error performance of a hybrid DS/FFH communication system and solves for the resulting system design parameters. The optimization objective function is non-convex and can be solved by applying the Karush-Kuhn-Tucker conditions. We also present our efforts toward exploring the design, implementation, and evaluation of a hybrid DS/FFH radio transceiver using a single field-programmable gate array (FPGA). Numerical and experimental results are presented under widely varying design parameters to demonstrate the adaptability of the waveform for varied harsh smart grid RF signal environments.

  3. Oil spreading in surface waters with an ice cover

    SciTech Connect (OSTI)

    Yapa, P.D.; Weerasuriya, S.A.; Belaskas, D.P.; Chowdhury, T.

    1993-02-01

    A study of oil spreading in surface waters in the presence of a floating ice cover is presented. The ice can be solid or fragmented. Both axi-symmetrical and uni-directional spreading are studied. The report describes the analytical and numerical model development, the experimental set-up, results from the laboratory experiments, and their comparison with the derived theory and the numerical simulation. To analyze the spreading of oil under solid ice, new equations are derived. These equations consider gravity (buoyancy) - inertia phase, gravity (buoyancy) - viscous phase, and the termination of spreading during the buoyancy - surface tension phase. The derivation considers both the constant discharge mode and the constant volume mode. Therefore, a complete description of the spreading phenomena from the time of initial spill to termination of spreading is presented. The emphasis of the study is on the dominant spreading mechanism for oil under ice, which is the buoyancy-viscous phase.

  4. The ROSAT HRI Point Spread Function

    E-Print Network [OSTI]

    Peter Predehl; Almudena Prieto

    2001-09-28

    A sample of the brightest point-like sources observed with the ROSAT-HRI were analysed to asses on the intrinsic shape of the ROSAT-HRI Point Spread Function (PSF). Almost all of the HRI observations collected during the ROSAT lifetime are found to be artificially broadened by factors up two ~2 due to residual errors in the ROSAT aspect solution. After correction by departing pointing positions, the width of the core of the PSF is found to be less than 5 arcsec (half energy width, HEW). On the basis of these results, an improved analytical representation of the ROSAT-HRI PSF is provided. However, for most of the new observations the source countrate is too weak to allow reliable recovering pf the ROSAT-HRI resolution. Therefore, a series of examples (data, correction, and theoretical PSF) are given in order to help the ROSAT user in determining whether "his/her source" is extended or not.

  5. Revealing latent factors of temporal networks for mesoscale intervention in epidemic spread

    E-Print Network [OSTI]

    Gauvin, Laetitia; Barrat, Alain; Cattuto, Ciro

    2015-01-01

    The customary perspective to reason about epidemic mitigation in temporal networks hinges on the identification of nodes with specific features or network roles. The ensuing individual-based control strategies, however, are difficult to carry out in practice and ignore important correlations between topological and temporal patterns. Here we adopt a mesoscopic perspective and present a principled framework to identify collective features at multiple scales and rank their importance for epidemic spread. We use tensor decomposition techniques to build an additive representation of a temporal network in terms of mesostructures, such as cohesive clusters and temporally-localized mixing patterns. This representation allows to determine the impact of individual mesostructures on epidemic spread and to assess the effect of targeted interventions that remove chosen structures. We illustrate this approach using high-resolution social network data on face-to-face interactions in a school and show that our method afford...

  6. Longitudinal bunch profile and electron beam energy spread

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

    Ring Parameters Previous: Storage Ring Operation Modes Longitudinal bunch profile and electron beam energy spread Longitudinal bunch profile depends mainly on the single bunch...

  7. 01-07-1999 - Contamination Spread Outside of Radiation Control...

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

    9 - Contamination Spread Outside of Radiation Control Areas by Fruit Flies Document Number: NA Effective Date: 011999 File (public): PDF icon 01-07-1999red...

  8. HIV virus spread and evolution studied through computer modeling

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

    HIV and evolution studied through computer modeling HIV virus spread and evolution studied through computer modeling This approach distinguishes between susceptible and infected...

  9. Multi-gigaelectronvolt, low-energy spread acceleration of positrons...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Multi-gigaelectronvolt, low-energy spread acceleration of positrons in a self-loaded plasma wakefield Citation Details In-Document Search Title:...

  10. Forest Fire Spread and Suppression in DEVS Lewis Ntaimo1

    E-Print Network [OSTI]

    Forest Fire Spread and Suppression in DEVS Lewis Ntaimo1 , Bithika Khargharia2 , Bernard P. Zeigler2 , Maria J. Vasconcelos3 Abstract In this paper we discuss modeling and simulation of forest fire simulation-based predictions of forest fire spread and suppression in uniform and non-uniform environmental

  11. PRICING AND HEDGING SPREAD OPTIONS RENE CARMONA AND VALDO DURRLEMAN

    E-Print Network [OSTI]

    Carmona, Rene

    a chance to venture in the poorly understood world of asset valuation and real options which are the objectPRICING AND HEDGING SPREAD OPTIONS REN´E CARMONA AND VALDO DURRLEMAN ABSTRACT. We survey the theoretical and the computational problems associated with the pricing of spread options. These options

  12. Implied and Local Correlations from Spread Options Rene Carmona

    E-Print Network [OSTI]

    Carmona, Rene

    cor- relation skew examplifies how inaccurate the constant correlation assumption in the multivariate a set of special parameters, and we propose a calibration procedure using option prices on individual. For example, the spark spread option is a spread between natural gas and electric power. The underlying is St

  13. APPLICATIONS Forest Fire Spread and Suppression in DEVS

    E-Print Network [OSTI]

    Ntaimo, Lewis

    APPLICATIONS Forest Fire Spread and Suppression in DEVS Lewis Ntaimo Department of Industrial. Speedway Tucson, AZ 85721 In this article, the authors discuss modeling and simulation of forest fire to obtain timely simulation-based predictions of forest fire spread and suppression in uniform

  14. Quantum internet using code division multiple access

    E-Print Network [OSTI]

    Jing Zhang; Yu-xi Liu; Sahin Kaya Ozdemir; Re-Bing Wu; Feifei Gao; Xiang-Bin Wang; Lan Yang; Franco Nori

    2013-09-12

    A crucial open problem in large-scale quantum networks is how to efficiently transmit quantum data among many pairs of users via a common data-transmission medium. We propose a solution by developing a quantum code division multiple access (q-CDMA) approach in which quantum information is chaotically encoded to spread its spectral content, and then decoded via chaos synchronization to separate different sender-receiver pairs. In comparison to other existing approaches, such as frequency division multiple access (FDMA), the proposed q-CDMA can greatly increase the information rates per channel used, especially for very noisy quantum channels.

  15. Data Mining Middleware for Wide Area High Performance Networks

    E-Print Network [OSTI]

    Grossman, Robert

    1 Data Mining Middleware for Wide Area High Performance Networks Robert L. Grossman*, Yunhong Gu, David Hanley, and Michal Sabala National Center for Data Mining, University of Illinois at Chicago, USA multiple high volume data streams. Both rely on newly developed data transport and data mining middleware

  16. Gang Migration of Virtual Machines using Cluster-wide Deduplication

    E-Print Network [OSTI]

    Gopalan, Kartik

    Gang Migration of Virtual Machines using Cluster-wide Deduplication Umesh Deshpande, Brandon}@binghamton.edu Abstract--Gang migration refers to the simultaneous live migration of multiple Virtual Machines (VMs) from failures. Gang migration generates a large volume of network traffic and can overload the core network

  17. Multiple sclerosis genetics

    E-Print Network [OSTI]

    Cree, BAC

    2014-01-01

    recurrence rates in multiple sclerosis. Proc Natl Acad Sci Ualloantigen Ag 7a in multiple sclerosis. Lancet 2: 814. Yeosusceptibility locus for multiple sclerosis. Ann Neurol 61:

  18. Electrically modulated dynamic spreading of drops on soft surfaces

    E-Print Network [OSTI]

    Ranabir Dey; Ashish Daga; Sunando DasGupta; Suman Chakraborty

    2015-04-07

    The intricate interaction between the deformability of a substrate and the dynamic spreading of a liquid drop on the same, under the application of an electrical voltage, has remained far from being well understood. Here, we demonstrate that electrospreading dynamics on soft substrates is dictated by the combined interplay of electrocapillarity, the wetting line friction and the viscoelastic energy dissipation at the contact line. Our results reveal that during such electro-elastocapillarity mediated spreading of a sessile drop, the contact radius evolution exhibits a universal power law in a substrate elasticity based non-dimensional time, with an electric potential dependent spreading exponent. Simultaneously, the macroscopic dynamic contact angle variation follows a general power law in the contact line velocity, normalized by elasticity dependent characteristic velocity scale. Our results are likely to provide the foundation for the development of a plethora of new applications involving droplet manipulations by exploiting the interplay between electrically triggered spreading and substrate-compliance over interfacial scales.

  19. Hierarchical Bayesian Models for Predicting The Spread of Ecological Processes

    E-Print Network [OSTI]

    Hierarchical Bayesian Models for Predicting The Spread of Ecological Processes Christopher K. Wikle Department of Statistics, University of Missouri To appear: Ecology June 10, 2002 Key Words: Bayesian, Diffusion, Forecast, Hierarchical, House Finch, Invasive, Malthu- sian, State Space, Uncertainty Abstract

  20. Physical Proximity and Spreading in Dynamic Social Networks

    E-Print Network [OSTI]

    Stopczynski, Arkadiusz; Lehmann, Sune

    2015-01-01

    Most infectious diseases spread on a dynamic network of human interactions. Recent studies of social dynamics have provided evidence that spreading patterns may depend strongly on detailed micro-dynamics of the social system. We have recorded every single interaction within a large population, mapping out---for the first time at scale---the complete proximity network for a densely-connected system. Here we show the striking impact of interaction-distance on the network structure and dynamics of spreading processes. We create networks supporting close (intimate network, up to ~1m) and longer distance (ambient network, up to ~10m) modes of transmission. The intimate network is fragmented, with weak ties bridging densely-connected neighborhoods, whereas the ambient network supports spread driven by random contacts between strangers. While there is no trivial mapping from the micro-dynamics of proximity networks to empirical epidemics, these networks provide a telling approximation of droplet and airborne modes o...

  1. Nature of Flow and Gas Dynamics Below Spreading Ponds

    E-Print Network [OSTI]

    Clark, Jordan F; Avisar, Dror; Hudson, G. Bryant

    2005-01-01

    breakthrough curve at El Rio #8. Pond 2 El Rio #5 El Rio #6Ne and Xe concentrations in Pond 2 and groundwater samples.vadose zone beneath a spreading pond in more detail than was

  2. Epidemic spreading in time-varying community networks

    SciTech Connect (OSTI)

    Ren, Guangming E-mail: ren-guang-ming@163.com; Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024 ; Wang, Xingyuan E-mail: ren-guang-ming@163.com

    2014-06-15

    The spreading processes of many infectious diseases have comparable time scale as the network evolution. Here, we present a simple networks model with time-varying community structure, and investigate susceptible-infected-susceptible epidemic spreading processes in this model. By both theoretic analysis and numerical simulations, we show that the efficiency of epidemic spreading in this model depends intensively on the mobility rate q of the individuals among communities. We also find that there exists a mobility rate threshold q{sub c}. The epidemic will survive when q?>?q{sub c} and die when q?spreading in complex networks with community structure.

  3. Intense spreading of radar echoes from ionospheric plasmas

    E-Print Network [OSTI]

    Dorfman, Seth E

    2005-01-01

    On December 25, 2004, a large-scale ionospheric plasma bubble was observed over Arecibo Observatory in Puerto Rico, inducing significant range spreading on ionograms. This phenomena may be explained by means of the E x B ...

  4. Interconnection-Wide Transmission Planning Initiative - Meeting...

    Energy Savers [EERE]

    Recovery Act Interconnection Transmission Planning Interconnection-Wide Transmission Planning Initiative - Meeting Calendars Interconnection-Wide Transmission Planning...

  5. Wide field of view telescope

    DOE Patents [OSTI]

    Ackermann, Mark R. (Albuquerque, NM); McGraw, John T. (Placitas, NM); Zimmer, Peter C. (Albuquerque, NM)

    2008-01-15

    A wide field of view telescope having two concave and two convex reflective surfaces, each with an aspheric surface contour, has a flat focal plane array. Each of the primary, secondary, tertiary, and quaternary reflective surfaces are rotationally symmetric about the optical axis. The combination of the reflective surfaces results in a wide field of view in the range of approximately 3.8.degree. to approximately 6.5.degree.. The length of the telescope along the optical axis is approximately equal to or less than the diameter of the largest of the reflective surfaces.

  6. Undulator-Based Laser Wakefield Accelerator Electron Beam Energy Spread and Emittance Diagnostic

    E-Print Network [OSTI]

    Bakeman, M.S.

    2011-01-01

    Laser Wakefield Accelerator Electron Beam Energy Spread andposition detection of electron beams from laser-plasmaLPA) to measure electron beam energy spread and emittance

  7. Going Deep vs. Going Wide

    Broader source: Energy.gov [DOE]

    Going Deep vs. Going Wide, from the Residential Energy Efficiency Solutions Conference 2012. Provides an overview on the progress of four energy efficiency programs: Clean Energy Works Oregon, Efficiency Maine, Energy Upgrade California Flex Path, and EcoHouse Loan Program.

  8. SOFTWAREENGINEERING The World Wide Web

    E-Print Network [OSTI]

    Whitehead, James

    SOFTWAREENGINEERING The World Wide Web Distributed Authoring and Versioning working group on the Web. WEBDAV: IETF Standard for Collaborative Authoring on the Web E. JAMES WHITEHEAD, JR. University remains to be done. What if instead you could simply edit Web documents (or any Web resource) in place

  9. Wide Bandgap Extrinsic Photoconductive Switches

    SciTech Connect (OSTI)

    Sullivan, J S

    2012-01-17

    Photoconductive semiconductor switches (PCSS) have been investigated since the late 1970s. Some devices have been developed that withstand tens of kilovolts and others that switch hundreds of amperes. However, no single device has been developed that can reliably withstand both high voltage and switch high current. Yet, photoconductive switches still hold the promise of reliable high voltage and high current operation with subnanosecond risetimes. Particularly since good quality, bulk, single crystal, wide bandgap semiconductor materials have recently become available. In this chapter we will review the basic operation of PCSS devices, status of PCSS devices and properties of the wide bandgap semiconductors 4H-SiC, 6H-SiC and 2H-GaN.

  10. New algorithms for adaptive optics point-spread function reconstruction

    E-Print Network [OSTI]

    Eric Gendron; Yann Clénet; Thierry Fusco; Gérard Rousset

    2006-06-28

    Context. The knowledge of the point-spread function compensated by adaptive optics is of prime importance in several image restoration techniques such as deconvolution and astrometric/photometric algorithms. Wavefront-related data from the adaptive optics real-time computer can be used to accurately estimate the point-spread function in adaptive optics observations. The only point-spread function reconstruction algorithm implemented on astronomical adaptive optics system makes use of particular functions, named $U\\_{ij}$. These $U\\_{ij}$ functions are derived from the mirror modes, and their number is proportional to the square number of these mirror modes. Aims. We present here two new algorithms for point-spread function reconstruction that aim at suppressing the use of these $U\\_{ij}$ functions to avoid the storage of a large amount of data and to shorten the computation time of this PSF reconstruction. Methods. Both algorithms take advantage of the eigen decomposition of the residual parallel phase covariance matrix. In the first algorithm, the use of a basis in which the latter matrix is diagonal reduces the number of $U\\_{ij}$ functions to the number of mirror modes. In the second algorithm, this eigen decomposition is used to compute phase screens that follow the same statistics as the residual parallel phase covariance matrix, and thus suppress the need for these $U\\_{ij}$ functions. Results. Our algorithms dramatically reduce the number of $U\\_{ij}$ functions to be computed for the point-spread function reconstruction. Adaptive optics simulations show the good accuracy of both algorithms to reconstruct the point-spread function.

  11. Scanning Raman spectroscopy for characterizing compositionally spread films

    E-Print Network [OSTI]

    Venimadhav, A.; Yates, K. A.; Blamire, Mark G.

    2004-01-01

    compositionally spread films Venimadhav. A?, Yates K. A., Blamire M. G. Department of Materials Science, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, UK Abstract Composition-spread La1-xSrxMnO3 thin films were prepared by pulsed laser... . This is close to the the phase coexistence predicted for LSMO single crystals at x = 0.17 [23]. Above x = 0.2, the 640 cm-1 mode completely disappears. The intensity of the 436 cm-1 peak in figure 4(b) shows maximum at x = 0.35. It is worth mentioning...

  12. Salary Spread Request Instructions: Please complete and print this form to elect or cancel salary spread. Once completed, the form should be sent

    E-Print Network [OSTI]

    Pillow, Jonathan

    Salary Spread Request Instructions: Please complete and print this form to elect or cancel salary. ________________________________________________________________________________________________________ REQUIREMENTS: Employees with a nine-month basis assignment may be eligible to spread their salary evenly over the 12 months of the fiscal year by completing this Salary Spread Request form. Once elected, the salary

  13. Wireless spread-spectrum telesensor chip with synchronous digital architecture

    DOE Patents [OSTI]

    Smith, Stephen F.; Turner, Gary W.; Wintenberg, Alan L.; Emery, Michael Steven

    2005-03-08

    A fully integrated wireless spread-spectrum sensor incorporating all elements of an "intelligent" sensor on a single circuit chip is capable of telemetering data to a receiver. Synchronous control of all elements of the chip provides low-cost, low-noise, and highly robust data transmission, in turn enabling the use of low-cost monolithic receivers.

  14. On the Spread of Viruses on the Internet Noam Berger

    E-Print Network [OSTI]

    Saberi, Amin

    distribution [14], this work is relevant both in the context of the spread of computer viruses on the Internet of antivirus software. Computers with the software installed are not permanently immune from the virus, but they are regularly scanned for the presence of the virus, and the software removes the virus if the computer is found

  15. On the Spread of Viruses on the Internet Noam Berger

    E-Print Network [OSTI]

    Chayes, Jennifer Tour

    , and the software removes the virus if the computer is found to be infected. A computer can be infected by the same. In this case, the antivirus software prevents any given computer from being reinfected with the same virusOn the Spread of Viruses on the Internet Noam Berger Christian Borgs Jennifer T. Chayes Amin

  16. Efficient Communication over Highly Spread Underwater Acoustic Channels

    E-Print Network [OSTI]

    Schniter, Philip

    unforgiving wireless medium" [2]. In fact, re- liable high-rate underwater acoustic communication remains a principal challenge in the construction of underwater net- works. The physical characteristics of the UAC of optimal and fail altogether in very highly spread environments such as the surf zone [20

  17. ACOUSTIC PULSE SPREADING IN A RANDOM FRACTAL KNUT S LNA

    E-Print Network [OSTI]

    Solna, Knut

    ACOUSTIC PULSE SPREADING IN A RANDOM FRACTAL KNUT S#28;LNA #3; Abstract. Fractal medium models are used to model for instance the heterogeneous earth and the turbulent atmosphere. A wave pulse with the medium uctuations. The modi#12;cation in the pulse shape depends on the roughness of the medium and can

  18. Building a Simulation of the Spread of a Virus

    E-Print Network [OSTI]

    Repenning, Alexander

    Building a Simulation of the Spread of a Virus Using the AgentSheets simulation-authoring tool of how to use the AgentSheets® simulation-authoring tool to 1) create a simulation of a virus attack. Create a simulation of a virus attack To illustrate how an AgentSheets simulation is created from scratch

  19. UMTS Capacity and Throughput Maximization for Different Spreading Factors

    E-Print Network [OSTI]

    Akl, Robert

    for signal-to-interference threshold from 5 dB to 10 dB and spreading factor values of 256, 64, 16, and 4 Erlang capacity based on the Lost Call Held (LCH) model as described in [4]. This algorithm calculates expression of Erlang capacity for a single type of traffic loading and compare analytical results

  20. Paper No. : 0317 LATERAL SPREADING DURING CENTRIFUGE MODEL

    E-Print Network [OSTI]

    Haigh, Stuart

    Paper No. : 0317 LATERAL SPREADING DURING CENTRIFUGE MODEL EARTHQUAKES Stuart K. Haigh1 , S sand marker lines within centrifuge models. A series of dynamic centrifuge model tests have been these free boundaries from previous earthquakes. Dynamic centrifuge modelling was carried out using sloping

  1. Observation of laser multiple filamentation process and multiple electron beams acceleration in a laser wakefield accelerator

    SciTech Connect (OSTI)

    Li, Wentao; Liu, Jiansheng; Wang, Wentao; Chen, Qiang; Zhang, Hui; Tian, Ye; Zhang, Zhijun; Qi, Rong; Wang, Cheng; Leng, Yuxin; Li, Ruxin; Xu, Zhizhan

    2013-11-15

    The multiple filaments formation process in the laser wakefield accelerator (LWFA) was observed by imaging the transmitted laser beam after propagating in the plasma of different density. During propagation, the laser first self-focused into a single filament. After that, it began to defocus with energy spreading in the transverse direction. Two filaments then formed from it and began to propagate independently, moving away from each other. We have also demonstrated that the laser multiple filamentation would lead to the multiple electron beams acceleration in the LWFA via ionization-induced injection scheme. Besides, its influences on the accelerated electron beams were also analyzed both in the single-stage LWFA and cascaded LWFA.

  2. Agricultural pathogen decontamination technology-reducing the threat of infectious agent spread.

    SciTech Connect (OSTI)

    Betty, Rita G.; Bieker, Jill Marie; Tucker, Mark David

    2005-10-01

    Outbreaks of infectious agricultural diseases, whether natural occurring or introduced intentionally, could have catastrophic impacts on the U.S. economy. Examples of such agricultural pathogens include foot and mouth disease (FMD), avian influenza (AI), citrus canker, wheat and soy rust, etc. Current approaches to mitigate the spread of agricultural pathogens include quarantine, development of vaccines for animal diseases, and development of pathogen resistant crop strains in the case of plant diseases. None of these approaches is rapid, and none address the potential persistence of the pathogen in the environment, which could lead to further spread of the agent and damage after quarantine is lifted. Pathogen spread in agricultural environments commonly occurs via transfer on agricultural equipment (transportation trailers, tractors, trucks, combines, etc.), having components made from a broad range of materials (galvanized and painted steel, rubber tires, glass and Plexiglas shields, etc), and under conditions of heavy organic load (mud, soil, feces, litter, etc). A key element of stemming the spread of an outbreak is to ensure complete inactivation of the pathogens in the agricultural environment and on the equipment used in those environments. Through the combination of enhanced agricultural pathogen decontamination chemistry and a validated inactivation verification methodology, important technologies for incorporation as components of a robust response capability will be enabled. Because of the potentially devastating economic impact that could result from the spread of infectious agricultural diseases, the proposed capability components will promote critical infrastructure protection and greater border and food supply security. We investigated and developed agricultural pathogen decontamination technologies to reduce the threat of infectious-agent spread, and thus enhance agricultural biosecurity. Specifically, enhanced detergency versions of the patented Sandia decontamination chemistry were developed and tested against a few surrogate pathogens under conditions of relatively heavy organic load. Tests were conducted on surfaces commonly found in agricultural environments. Wide spectrum decontamination efficacy, low corrosivity, and biodegradability issues were addressed in developing an enhanced detergency formulation. A method for rapid assessment of loss of pathogenic activity (inactivation) was also assessed. This enhanced technology will enable rapid assessment of contamination following an intentional event, and will also be extremely useful in routine assessment of agricultural environments. The primary effort during the second year was progress towards a demonstration of both decontamination and viral inactivation technologies of Foot and Mouth virus (FMDv) using the modified SNL chemistry developed through this project. Lab studies using a surrogate virus (bovine enterovirus) were conducted using DF200, modified DF200 chemistry, and decontaminants currently recommended for use in heavily loaded organic, agricultural environments (VirkonS, 10% bleach, sodium hydroxide and citric acid). Tests using actual FMD virus will be performed at the Department of Homeland Security's Plum Island facilities in the fall of 2005. Success and the insight gained from this project will lead to enhanced response capability, which will benefit agencies such as USDA, DHS, DOD, and the agricultural industry.

  3. An Efficient Local Strategy to Control Information Spreading in Network

    E-Print Network [OSTI]

    Mehta, Anoop

    2015-01-01

    In social networks, control of rumor spread is an active area of research. SIR model is generally used to study the rumor dynamics in network while considering the rumor as an epidemic. In disease spreading model, epidemic is controlled by removing central nodes in the network. Full network information is needed for such removal. To have the information of complete network is difficult proposition. As a consequence, the search of an algorithm that may control epidemic without needing global information is a matter of great interest. In this paper, an immunization strategy is proposed that uses only local information available at a node, viz. degree of the node and average degree of its neighbour nodes. Proposed algorithm has been evaluated for scale-free network using SIR model. Numerical results show that proposed method has less complexity and gives significantly better results in comparison with other strategies while using only local information.

  4. Wide Area Security Region Final Report

    SciTech Connect (OSTI)

    Makarov, Yuri V.; Lu, Shuai; Guo, Xinxin; Gronquist, James; Du, Pengwei; Nguyen, Tony B.; Burns, J. W.

    2010-03-31

    This report develops innovative and efficient methodologies and practical procedures to determine the wide-area security region of a power system, which take into consideration all types of system constraints including thermal, voltage, voltage stability, transient and potentially oscillatory stability limits in the system. The approach expands the idea of transmission system nomograms to a multidimensional case, involving multiple system limits and parameters such as transmission path constraints, zonal generation or load, etc., considered concurrently. The security region boundary is represented using its piecewise approximation with the help of linear inequalities (so called hyperplanes) in a multi-dimensional space, consisting of system parameters that are critical for security analyses. The goal of this approximation is to find a minimum set of hyperplanes that describe the boundary with a given accuracy. Methodologies are also developed to use the security hyperplanes, pre-calculated offline, to determine system security margins in real-time system operations, to identify weak elements in the system, and to calculate key contributing factors and sensitivities to determine the best system controls in real time and to assist in developing remedial actions and transmission system enhancements offline . A prototype program that automates the simulation procedures used to build the set of security hyperplanes has also been developed. The program makes it convenient to update the set of security hyperplanes necessitated by changes in system configurations. A prototype operational tool that uses the security hyperplanes to assess security margins and to calculate optimal control directions in real time has been built to demonstrate the project success. Numerical simulations have been conducted using the full-size Western Electricity Coordinating Council (WECC) system model, and they clearly demonstrated the feasibility and the effectiveness of the developed technology. Recommendations for the future work have also been formulated.

  5. Ultra wide-bandwidth micro energy harvester

    E-Print Network [OSTI]

    Hajati, Arman

    2011-01-01

    An ultra wide-bandwidth resonating thin film PZT MEMS energy harvester has been designed, modeled, fabricated and tested. It harvests energy from parasitic ambient vibration at a wide range of amplitude and frequency via ...

  6. Africa-wide Great Ape Population Surveillance

    E-Print Network [OSTI]

    Schematic illustration of the data collection protocol for our nation-wide survey in Liberia © by Martha

  7. Radioactive Waste Management Complex Wide Review

    Office of Environmental Management (EM)

    This page intentionally blank i Complex-Wide Review of DOE's Radioactive Waste Management Summary Report TABLE OF CONTENTS Acronyms ......

  8. Risk Analysis, Vol. 24, No. 4, 2004 Assessing the Risk of Invasive Spread

    E-Print Network [OSTI]

    With, Kimberly A.

    Risk Analysis, Vol. 24, No. 4, 2004 Assessing the Risk of Invasive Spread in Fragmented Landscapes in the field of landscape ecology, provide a tool for assessing the risk of invasive spread in fragmented landscapes. A percolation-based analysis of the potential for invasive spread in fragmented landscapes

  9. Efficiency and Energy Spread in Laser-Wakefield Acceleration A. J. W. Reitsma,1

    E-Print Network [OSTI]

    Strathclyde, University of

    Efficiency and Energy Spread in Laser-Wakefield Acceleration A. J. W. Reitsma,1 R. A. Cairns,2 R 2004; published 4 March 2005) The theoretical limits on efficiency and energy spread of the laser. An inherent trade-off between energy spread and efficiency exists. DOI: 10.1103/PhysRevLett.94.085004 PACS

  10. Spread of North American wind-dispersed trees in future environments

    E-Print Network [OSTI]

    He, Yanping

    LETTER Spread of North American wind-dispersed trees in future environments Ran Nathan,1 * Nir a formidable challenge to be confronted. We modelled the spread of North American wind- dispersed trees species, predicted wind-driven spread will match future climate changes, conditioned on seed abscission

  11. A Markov model for the spread of Hepatitis C

    E-Print Network [OSTI]

    Coutin, Laure; Dhersin, Jean-Stephane

    2008-01-01

    We propose a Markov model for the spread of Hepatitis C virus (HCV) among drug users who use injections. We then proceed to an asymptotic analysis (large initial population) and show that the Markov process is close to the solution of a non linear autonomous differential system. We prove both a law of large numbers and functional central limit theorem to precise the speed of convergence towards the limiting system. The deterministic system itself converges, as time goes to infinity, to an equilibrium point. This corroborates the empirical observations about the prevalence of HCV.

  12. Golden Spread Electric Cooperative, Inc | 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 APPENDIX E LISTStar2-0057-EA Jump to:ofEniaElectric JumpAtlasBridge Strategies Jump to:Spread

  13. Airborne spread of foot-and-mouth disease - model intercomparison

    SciTech Connect (OSTI)

    Gloster, J; Jones, A; Redington, A; Burgin, L; Sorensen, J H; Turner, R; Dillon, M; Hullinger, P; Simpson, M; Astrup, P; Garner, G; Stewart, P; D'Amours, R; Sellers, R; Paton, D

    2008-09-04

    Foot-and-mouth disease is a highly infectious vesicular disease of cloven-hoofed animals caused by foot-and-mouth disease virus. It spreads by direct contact between animals, by animal products (milk, meat and semen), by mechanical transfer on people or fomites and by the airborne route - with the relative importance of each mechanism depending on the particular outbreak characteristics. Over the years a number of workers have developed or adapted atmospheric dispersion models to assess the risk of foot-and-mouth disease virus spread through the air. Six of these models were compared at a workshop hosted by the Institute for Animal Health/Met Office during 2008. A number of key issues emerged from the workshop and subsequent modelling work: (1) in general all of the models predicted similar directions for 'at risk' livestock with much of the remaining differences strongly related to differences in the meteorological data used; (2) determination of an accurate sequence of events is highly important, especially if the meteorological conditions vary substantially during the virus emission period; and (3) differences in assumptions made about virus release, environmental fate, and subsequent infection can substantially modify the size and location of the downwind risk area. Close relationships have now been established between participants, which in the event of an outbreak of disease could be readily activated to supply advice or modelling support.

  14. Understanding Spreading Patterns on Social Networks Based on Network Topology

    E-Print Network [OSTI]

    Saxena, Akrati; Gupta, Yayati

    2015-01-01

    Ever since the proposal of first epidemic model, scientists have been attempting to estimate the growth of a disease/contagion while in its premature stage. Despite being the focus of researchers for a long time, understanding epidemiology remains as error prone as a weather forecast, mainly because of the unavailability of large amount of data. An epidemic spread is analogous to the diffusion of memes in social networking sites. Diffusion of memes can be easily studied provided large datasets and computational powers to extract information from online networks. So, studying a meme spreading pattern can help us in understanding epidemiology. In this paper, we analyse the impact of the topology of a social network, specifically its meso scale properties- community structure and core-periphery structure, on a meme traversing over it. We propose a meme propagation model for synthetic scale free graphs which resemble real world graphs and observe the process of a meme going viral on such a network. We also valida...

  15. Classification of Message Spreading in a Heterogeneous Social Network

    E-Print Network [OSTI]

    Jendoubi, Siwar; Liétard, Ludovic; Yaghlane, Boutheina Ben

    2015-01-01

    Nowadays, social networks such as Twitter, Facebook and LinkedIn become increasingly popular. In fact, they introduced new habits, new ways of communication and they collect every day several information that have different sources. Most existing research works fo-cus on the analysis of homogeneous social networks, i.e. we have a single type of node and link in the network. However, in the real world, social networks offer several types of nodes and links. Hence, with a view to preserve as much information as possible, it is important to consider so-cial networks as heterogeneous and uncertain. The goal of our paper is to classify the social message based on its spreading in the network and the theory of belief functions. The proposed classifier interprets the spread of messages on the network, crossed paths and types of links. We tested our classifier on a real word network that we collected from Twitter, and our experiments show the performance of our belief classifier.

  16. Credit Spreads and Bond Price-Based Pricing Credit Spreads and Bond Price-Based Pricing Chapter 3

    E-Print Network [OSTI]

    Ciocan-Fontanine, Ionut

    ;Defaultable Floater Coupons paid at time Tkn are Libor + spread n-1(L(Tkn-1 , Lkn ) + spar ) = ( 1 B(Tkn-1 , Lkn ) - 1) + spar n-1 The value of defaultable 1 B(Tkn-1 ,Lkn) at time Tkn-1 is: 1 B(Tkn-1 , Lkn ) ¯B III All together ¯C(0) = N n=1 n-1F(0, Tkn-1 , Tkn )¯B(0, Tkn ) +spar N n=1 n-1 ¯B(0, Tkn ) +¯B(0, Tk

  17. Energy Spread Reduction of Electron Beams Produced via Laser Wake

    SciTech Connect (OSTI)

    Pollock, B

    2012-03-19

    Laser wakefield acceleration of electrons holds great promise for producing ultra-compact stages of GeV scale, high quality electron beams for applications such as x-ray free electron lasers and high energy colliders. Ultra-high intensity laser pulses can be self-guided by relativistic plasma waves over tens of vacuum diffraction lengths, to give >1 GeV energy in cm-scale low density plasma using ionization-induced injection to inject charge into the wake at low densities. This thesis describes a series of experiments which investigates the physics of LWFA in the self-guided blowout regime. Beginning with high density gas jet experiments the scaling of the LWFA-produced electron beam energy with plasma electron density is found to be in excellent agreement with both phenomenological theory and with 3-D PIC simulations. It is also determined that self-trapping of background electrons into the wake exhibits a threshold as a function of the electron density, and at the densities required to produce electron beams with energies exceeding 1 GeV a different mechanism is required to trap charge into low density wakes. By introducing small concentrations of high-Z gas to the nominal He background the ionization-induced injection mechanism is enabled. Electron trapping is observed at densities as low as 1.3 x 10{sup 18} cm{sup -3} in a gas cell target, and 1.45 GeV electrons are demonstrated for the first time from LWFA. This is currently the highest electron energy ever produced from LWFA. The ionization-induced trapping mechanism is also shown to generate quasi-continuous electron beam energies, which is undesirable for accelerator applications. By limiting the region over which ionization-induced trapping occurs, the energy spread of the electron beams can be controlled. The development of a novel two-stage gas cell target provides the capability to tailor the gas composition in the longitudinal direction, and confine the trapping process to occur only in a limited, defined region. Using this technique a 460 MeV electron beam was produced with an energy spread of 5%. This technique is directly scalable to multi-GeV electron beam generation with sub-percent energy spreads.

  18. Interconnection-Wide Transmission Planning Initiative: Topic...

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

    State Agency Input Regarding Electric Resource and Transmission Planning in the Texas Interconnection Interconnection-Wide Transmission Planning Initiative: Topic B, State Agency...

  19. Interconnection-Wide Transmission Planning Initiative: Topic...

    Office of Environmental Management (EM)

    A, Interconnection-Level Analysis and Planning Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Level Analysis and Planning A description of the...

  20. Interconnection-Wide Transmission Planning Initiative: Topic...

    Office of Environmental Management (EM)

    Interconnection on Electric Resource Planning and Priorities Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern...

  1. Interconnection-Wide Transmission Planning Initiative: Topic...

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

    Western Interconnection under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. The fundamental purpose of the awards...

  2. Opportunities for Wide Bandgap Semiconductor Power Electronics...

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

    Opportunities for Wide Bandgap Semiconductor Power Electronics for Hydrogen and Fuel Cell Applications U.S. Department of Energy Fuel Cell Technologies Office Presenters: Jeff...

  3. DFAS Wide-Area Workflow Issues

    Broader source: Energy.gov [DOE]

    Presentation covers the DFAS wide-area workflow issues and is given at the Spring 2011 Federal Utility Partnership Working Group (FUPWG) meeting.

  4. Fusion rate enhancement due to energy spread of colliding nuclei

    E-Print Network [OSTI]

    G. Fiorentini; C. Rolfs; F. L. Villante; B. Ricci

    2002-10-24

    Experimental results for sub-barrier nuclear fusion reactions show cross section enhancements with respect to bare nuclei which are generally larger than those expected according to electron screening calculations. We point out that energy spread of target or projectile nuclei is a mechanism which generally provides fusion enhancement. We present a general formula for calculating the enhancement factor and we provide quantitative estimate for effects due to thermal motion, vibrations inside atomic, molecular or crystal system, and due to finite beam energy width. All these effects are marginal at the energies which are presently measurable, however they have to be considered in future experiments at still lower energies. This study allows to exclude several effects as possible explanation of the observed anomalous fusion enhancements, which remain a mistery.

  5. Multiple mass solvers

    E-Print Network [OSTI]

    B. Jegerlehner

    1997-08-29

    We present a general method to construct multiple mass solvers from standard algorithms. As an example, the BiCGstab-M algorithm is derived.

  6. X-ray optical systems: from metrology to Point Spread Function

    E-Print Network [OSTI]

    Spiga, D

    2015-01-01

    One of the problems often encountered in X-ray mirror manufacturing is setting proper manufacturing tolerances to guarantee an angular resolution - often expressed in terms of Point Spread Function (PSF) - as needed by the specific science goal. To do this, we need an accurate metrological apparatus, covering a very broad range of spatial frequencies, and an affordable method to compute the PSF from the metrology dataset. [...] However, the separation between these spectral ranges is difficult do define exactly, and it is also unclear how to affordably combine the PSFs, computed with different methods in different spectral ranges, into a PSF expectation at a given X-ray energy. For this reason, we have proposed a method entirely based on the Huygens-Fresnel principle to compute the diffracted field of real Wolter-I optics, including measured defects over a wide range of spatial frequencies. Owing to the shallow angles at play, the computation can be simplified limiting the computation to the longitudinal prof...

  7. COLLISIONAL EVOLUTION OF ULTRA-WIDE TRANS-NEPTUNIAN BINARIES

    SciTech Connect (OSTI)

    Parker, Alex H. [Department of Astronomy, University of Victoria, Victoria BC (Canada); Kavelaars, J. J., E-mail: alexhp@uvic.ca [Herzberg Institute of Astrophysics, National Research Council of Canada, Saanich BC (Canada)

    2012-01-10

    The widely separated, near-equal mass binaries hosted by the cold classical Kuiper Belt are delicately bound and subject to disruption by many perturbing processes. We use analytical arguments and numerical simulations to determine their collisional lifetimes given various impactor size distributions and include the effects of mass loss and multiple impacts over the lifetime of each system. These collisional lifetimes constrain the population of small (R {approx}> 1 km) objects currently residing in the Kuiper Belt and confirm that the size distribution slope at small size cannot be excessively steep-likely q {approx}< 3.5. We track mutual semimajor axis, inclination, and eccentricity evolution through our simulations and show that it is unlikely that the wide binary population represents an evolved tail of the primordially tight binary population. We find that if the wide binaries are a collisionally eroded population, their primordial mutual orbit planes must have preferred to lie in the plane of the solar system. Finally, we find that current limits on the size distribution at small radii remain high enough that the prospect of detecting dust-producing collisions in real time in the Kuiper Belt with future optical surveys is feasible.

  8. Exploring the complex pattern of information spreading in online blog communities

    E-Print Network [OSTI]

    Pei, Sen; Tang, Shaoting; Zheng, Zhiming; Makse, Hernan A

    2015-01-01

    Information spreading in online social communities has attracted tremendous attention due to its utmost practical values in applications. Despite that several individual-level diffusion data have been investigated, we still lack the detailed understanding of the spreading pattern of information. Here, by comparing information flows and social links in a blog community, we find that the diffusion processes are induced by three different spreading mechanisms: social spreading, self-promotion and broadcast. Although numerous previous studies have employed epidemic spreading models to simulate information diffusion, we observe that such models fail to reproduce the realistic diffusion pattern. In respect to users behaviors, strikingly, we find that most users would stick to one specific diffusion mechanism. Moreover, our observations indicate that the social spreading is not only crucial for the structure of diffusion trees, but also capable of inducing more subsequent individuals to acquire the information. Our ...

  9. Multiple density layered insulator

    DOE Patents [OSTI]

    Alger, Terry W. (Tracy, CA)

    1994-01-01

    A multiple density layered insulator for use with a laser is disclosed wh provides at least two different insulation materials for a laser discharge tube, where the two insulation materials have different thermoconductivities. The multiple layer insulation materials provide for improved thermoconductivity capability for improved laser operation.

  10. Impact of picolitre droplets on superhydrophobic surfaces with ultra-low spreading ratios

    E-Print Network [OSTI]

    Brown, P.S.; Berson, A.; Talbot, E.L.; Wood, T.J.; Schofield, W.C.E.; Bain, C.D.; Badyal, J.P.S.

    2011-01-01

    :24 1 IMPACT OF PICOLITRE DROPLETS ON SUPERHYDROPHOBIC SURFACES WITH ULTRA-LOW SPREADING RATIOS P. S. Brown, A. Berson, E. L. Talbot, T. J. Wood, W. C. E. Schofield, C. D. Bain†, and J. P. S. Badyal†* Department of Chemistry Science... the dynamics of wetting to be precisely controlled. Final spreading ratios as low as 0.63 can be achieved. Comparison of the maximum spreading ratio and droplet oscillation frequencies with models described in the literature shows that both are found...

  11. A multiple-input operational transconductance amplifier with a wide linear range 

    E-Print Network [OSTI]

    Reed, Russell Deryl

    1986-01-01

    OTA A. Basic OTA Circuits B. Internal Operation of the OTA C. The Bipolar OTA D. The CMOS OTA E. The Output Stage F. Summary III DESIGN OF THE CASCODE TRANSCONDUCTANCE STAGE 5 7 7 8 9 14 17 17 19 20 22 24 25 26 28 31 32 32 34... transfer function 2. 6 The use of linearizing diodes for increased linear range 2. 7 A CMOS OTA Page 10 12 13 15 2. 8 Plot of the theoretical DC transfer function for a CMOS differential amplifier 16 3. 1 The cascode transconductance stage 3. 2...

  12. A "Candidate-Interactome" Aggregate Analysis of Genome-Wide Association Data in Multiple Sclerosis

    E-Print Network [OSTI]

    2013-01-01

    Institute for Molecular Medicine Finland (FIMM), Universityof Helsinki, Helsinki, Finland INSERM UMR S 975 CRICM, UPMC,University Hospital, Tampere, Finland University of Tampere,

  13. A "Candidate-Interactome" Aggregate Analysis of Genome-Wide Association Data in Multiple Sclerosis

    E-Print Network [OSTI]

    2013-01-01

    Kiel, Germany Department of Neurology, Tampere UniversityHospital, Tampere, FinlandUniversity of Tampere, Medical School, Tampere, Finland

  14. A SINE family widely distributed in the plant kingdom and its evolutionary history

    E-Print Network [OSTI]

    Gent, Universiteit

    A SINE family widely distributed in the plant kingdom and its evolutionary history Jeffrey A Company Limited, Takenouchicho 11, Ichijoji, Sakyoku, Kyoto 606-8134, Japan Received 7 September 2005. japonicus. This is the first report of a plant SINE family present in multiple lineages, and the evolution

  15. Preliminary assessment of the ecological risks to wide-ranging wildlife species on the Oak Ridge Reservation

    SciTech Connect (OSTI)

    Sample, B.E.; Baron, L.A.; Jackson, B.L.

    1995-08-01

    Historically, ecological risk assessment at CERCLA sites [such as the Oak Ridge Reservation (ORR)], has focused on species that may be definitively associated with a contaminated area or source operable unit. Consequently the species that are generally considered are those with home ranges small enough such that multiple individuals or a distinct population can be expected to reside within the boundaries of the contaminated site. This approach is adequate for sites with single, discrete areas of contamination that only provide habitat for species with limited requirements. This approach is not adequate however for large sites with multiple, spatially separated contaminated areas that provide habitat for wide-ranging wildlife species. Because wide-ranging wildlife species may travel between and use multiple contaminated sites they may be exposed to and be at risk from contaminants from multiple locations. Use of a particular contaminated site by wide-ranging species will be dependent upon the amount of suitable habitat available at that site. Therefore to adequately evaluate risks to wide-ranging species at the ORR-wide scale, the use of multiple contaminated sites must be weighted by the amount of suitable habitat on OUs. This reservation-wide ecological risk assessment is intended to identify which endpoints are significantly at risk; which contaminants are responsible for this risk; and which OUs significantly contribute to risk.

  16. Static pushover analyses of pile groups in liquefied and laterally spreading ground in centrifuge tests

    E-Print Network [OSTI]

    Brandenberg, Scott J; Boulanger, R W; Kutter, Bruce L; Chang, Dongdong

    2007-01-01

    spreading ground during centrifuge tests. ” J. Geotech.and Liu, L. ?1995?. “Centrifuge modeling of liquefactionGonzales, L. ?2005?. “Centrifuge modeling of permeability

  17. West Wide Programmatic Environmental Impact Statement Record...

    Open Energy Info (EERE)

    Reference LibraryAdd to library Legal Document- OtherOther: West Wide Programmatic Environmental Impact Statement Record of Decision (BLM)Legal Published NA Year Signed or Took...

  18. DOE-wide NEPA Contracting Update

    Broader source: Energy.gov [DOE]

    A DOE team is evaluating the offers received in response to a Request for Quotations to provide NEPA support services. The scope of the solicitation is similar to that of the DOE-wide NEPA support...

  19. Ultra-wide bandwidth piezoelectric energy harvesting

    E-Print Network [OSTI]

    Hajati, Arman

    Here, we present an ultra wide-bandwidth energy harvester by exploiting the nonlinear stiffness of a doubly clamped microelectromechanical systems (MEMSs) resonator. The stretching strain in a doubly clamped beam shows a ...

  20. Attributing Mental Properties to Wide Subjects 

    E-Print Network [OSTI]

    Butts, Evan

    2008-12-04

    Rob Wilson (2001) claims that mental properties are not attributable to wide subjects, despite the claims of authors like Clark and Chalmers (1998). I examine Wilson's objection and endeavor to demonstrate that Clark and Chalmers' account does...

  1. Can we stop the spread of influenza in schools with face masks?

    SciTech Connect (OSTI)

    Del Valle, Sara Y; Tellier, Raymond; Settles, Gary; Tang, Julian

    2009-01-01

    In the absence of a strain-specific vaccine and the potential resistance to antiviral medication, nonpharmaceutical interventions can be used to reduce the spread of an infectious disease such as influenza. The most common non-pharmaceutical interventions include school closures, travel restrictions, social distancing, enforced or volunteer home isolation and quarantine, improved hand hygiene, and the appropriate wearing of face masks. However, for some of these interventions, there are some unavoidable economic costs to both employees and employers, as well as possible additional detriment to society as a whole. For example, it has been shown that school-age children are most likely to be infected and act as sources of infection for others, due to their greater societal interaction and increased susceptibility. Therefore, preventing or at least reducing infections in children is a logical first-line of defense. For this reason, school closures have been widely investigated and recommended as part of pandemic influenza preparedness, and some studies support this conclusion. Yet, school closures would result in lost work days if at least one parent must be absent from work to care for children who would otherwise be at school. In addition, the delay in-academic progress may be detrimental due to mass school absenteeism. In particular, the pandemic influenza guidance by the U.S. Department of Health and Human Services recommends school closures for less than four weeks for Category 2 and 3 pandemics (i.e., similar to the milder 1957 and 1968 pandemics) and one to three months for Category 4 and 5 pandemics (i .e., similar to the 1918 pandemic ). Yet, given the above, it is clear that closing schools for up to three months is unlikely to be a practical mitigation strategy for many families and society. Thus modelers and policy makers need to weigh all factors before recommending such drastic measures, particularly if the agent under consideration typically has low mortality and causes a mild disease. Therefore, we contend that face masks are an effective, practical, non-pharmaceutical intervention that would reduce the spread of disease among school-children, while keeping schools open. Influenza spreads through person-to-person contact, via transmission by large droplets or aerosols (droplet nuclei) produced by breathing, talking, coughing or sneezing, as well as by direct (though most people touch very few others in their daily lives) or indirect (i.e., via fomites) contact. Face masks act as a physical barrier to reduce the amount of potentially infectious inhaled and exhaled particles, although they would not reliably protect the wearer against aerosols; a recent study also demonstrated that they can redirect and decelerate exhaled airflows (when worn by an infected individual) to prevent them from entering the breathing zones of others. Thus, if a whole classroom were to don face masks, disease transmission would be expected to be greatly diminished. Another recent study on face masks and hand hygiene show a 10-50% transmission reduction for influenza-like illnesses. Furthermore, face masks can act as an effective physical reminder and barrier to transmission by preventing the wearer from touching any potentially infectious secretions from their mucous membranes (i.e., from the nose and mouth), which is another mechanism for direct and indirect contact transmission for influenza. A recent systematic review has suggested that wearing masks can be highly effective in limiting the transmission of respiratory infections, such as influenza. Yet, admittedly, the effectiveness of this intervention strategy is highly dependent on compliance (i.e., the willingness to wear the mask in all appropriate situations), which in tum depends on comfort, convenience, fitness, and hygiene. Importantly, masks themselves must not become a source of infection (or reinfection); as such they should be replaced or sanitized daily (where possible) to maximize effectiveness. One solution could be for masks to be touted as fashion accessories, whi

  2. GIS-Based Epidemiological Modeling of an Emerging Forest Disease: Spread of

    E-Print Network [OSTI]

    247 GIS-Based Epidemiological Modeling of an Emerging Forest Disease: Spread of Sudden Oak Death applied in a GIS to real-world wildland landscapes. In this paper, we present and evaluate a GIS model was implemented (1990-2005) in a GIS to simulate disease spread across California at a spatial

  3. A Computational Study of the Spreading of Oil Underneath a Sheet of Ice Mark Sussman

    E-Print Network [OSTI]

    Sussman, Mark

    A Computational Study of the Spreading of Oil Underneath a Sheet of Ice Mark Sussman Department) The spreading of oil underneath a sheet of ice is computed using an adaptive level set method for incompressible of a body of oil under ice in water. The computational models are used to make further observations

  4. A Computational Study of the Spreading of Oil Underneath a Sheet of Ice

    E-Print Network [OSTI]

    Ferguson, Thomas S.

    A Computational Study of the Spreading of Oil Underneath a Sheet of Ice Mark Sussman Department) Abstract The spreading of oil underneath a sheet of ice is computed using an adaptive level set method the final steady profile of a body of oil under ice in water. The computational models are used to make

  5. Short Paper: OFDM in Deep Water Acoustic Channels with Extremely Long Delay Spread

    E-Print Network [OSTI]

    Zhou, Shengli

    Short Paper: OFDM in Deep Water Acoustic Channels with Extremely Long Delay Spread Zhaohui Wang ABSTRACT Deep water horizontal channels usually have very long de- lay spreads relative to shallow water-block-interference (IBI) in the received signals. In this paper, we consider the application of ZP-OFDM in deep water

  6. Spread spectrum communication system with chaotic frequency A. R. Volkovskii,a

    E-Print Network [OSTI]

    Tsimring, Lev S.

    Spread spectrum communication system with chaotic frequency modulation A. R. Volkovskii,a L. Sh spread spectrum communication system utilizing chaotic frequency modulation of sinusoidal signals-based communication system. © 2005 American Institute of Physics. DOI: 10.1063/1.1942327 The ability of chaotic

  7. Slug pellet spreading: the double-disc performances available with a single disc spreader

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Slug pellet spreading: the double-disc performances available with a single disc spreader D for slug pellets application. The principal aim of this paper is to show the chosen way to reach spreading pellets 1 Introduction In France, slugs are considered as a harmful destroyer for crops. Their activities

  8. Quantifying fluctuations in market liquidity: Analysis of the bid-ask spread Vasiliki Plerou,* Parameswaran Gopikrishnan,

    E-Print Network [OSTI]

    Stanley, H. Eugene

    Quantifying fluctuations in market liquidity: Analysis of the bid-ask spread Vasiliki Plerou the statistical features of the bid-ask spread offers the possibility of understanding some aspects of market liquidity. Using quote data for the 116 most frequently traded stocks on the New York Stock Exchange over

  9. FOURIER TRANSFORM MULTIPLE QUANTUM NMR

    E-Print Network [OSTI]

    Drobny, G.

    2011-01-01

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

  10. Detecting the Influence of Spreading in Social Networks with Excitable Sensor Networks

    E-Print Network [OSTI]

    Pei, Sen; Zheng, Zhiming

    2015-01-01

    Detecting spreading outbreaks in social networks with sensors is of great significance in applications. Inspired by the formation mechanism of human's physical sensations to external stimuli, we propose a new method to detect the influence of spreading by constructing excitable sensor networks. Exploiting the amplifying effect of excitable sensor networks, our method can better detect small-scale spreading processes. At the same time, it can also distinguish large-scale diffusion instances due to the self-inhibition effect of excitable elements. Through simulations of diverse spreading dynamics on typical real-world social networks (facebook, coauthor and email social networks), we find that the excitable senor networks are capable of detecting and ranking spreading processes in a much wider range of influence than other commonly used sensor placement methods, such as random, targeted, acquaintance and distance strategies. In addition, we validate the efficacy of our method with diffusion data from a real-wor...

  11. 3-D simulations of multiple beam klystrons

    SciTech Connect (OSTI)

    Smithe, David N.; Bettenhausen, Mike; Ludeking, Larry; Caryotakis, G.; Sprehn, Daryl; Scheitrum, Glenn [Mission Research Corporation, 8560 Cinderbed Rd., Suite 700, Newington, Virginia 22122 (United States); Stanford Linear Accelerator Center, 2575 Sand Hill Rd., Menlo Park, California 94025 (United States)

    1999-05-07

    The MAGIC3D simulation code is being used to assess the multi-dimensional physics issues relating to the design and operation of multiple beam klystrons. Investigations, to date, include a detailed study of the mode structure of the cavities in the 19-beam hexagonally packed geometry and a study of the velocity spread caused by the cavity mode's field profile. Some attempts to minimize this effect are investigated. Additional simulations have provided quantification of the beam loading Q in a dual input cavity, and optimization of a dual output cavity. An important goal of the simulations is an accurate picture of beam transport along the length of the MBK. We have quantified the magnitude and spatial variation of the beam-line space charge interactions within a cavity gap. Present simulations have demonstrated the transport of the beam through three cavities (the present limits of our simulation size) without difficulty; additional length simulations are expected. We have also examined unbalanced beam-line scenarios, e.g., one beam-line suppressed, and find little disturbance to the transport in individual cavity tests, with results for multiple cavity transport expected.

  12. Multiple stage multiple filter hydrate store

    DOE Patents [OSTI]

    Bjorkman, Jr., Harry K. (Birmingham, MI)

    1983-05-31

    An improved hydrate store for a metal halogen battery system is disclosed which employs a multiple stage, multiple filter means or separating the halogen hydrate from the liquid used in forming the hydrate. The filter means is constructed in the form of three separate sections which combine to substantially cover the interior surface of the store container. Exit conduit means is provided in association with the filter means for transmitting liquid passing through the filter means to a hydrate former subsystem. The hydrate former subsystem combines the halogen gas generated during the charging of the battery system with the liquid to form the hydrate in association with the store. Relief valve means is interposed in the exit conduit means for controlling the operation of the separate sections of the filter means, such that the liquid flow through the exit conduit means from each of the separate sections is controlled in a predetermined sequence. The three separate sections of the filter means operate in three discrete stages to provide a substantially uniform liquid flow to the hydrate former subsystem during the charging of the battery system. The separation of the liquid from the hydrate causes an increase in the density of the hydrate by concentrating the hydrate along the filter means.

  13. Multiple stage multiple filter hydrate store

    DOE Patents [OSTI]

    Bjorkman, H.K. Jr.

    1983-05-31

    An improved hydrate store for a metal halogen battery system is disclosed which employs a multiple stage, multiple filter means for separating the halogen hydrate from the liquid used in forming the hydrate. The filter means is constructed in the form of three separate sections which combine to substantially cover the interior surface of the store container. Exit conduit means is provided in association with the filter means for transmitting liquid passing through the filter means to a hydrate former subsystem. The hydrate former subsystem combines the halogen gas generated during the charging of the battery system with the liquid to form the hydrate in association with the store. Relief valve means is interposed in the exit conduit means for controlling the operation of the separate sections of the filter means, such that the liquid flow through the exit conduit means from each of the separate sections is controlled in a predetermined sequence. The three separate sections of the filter means operate in three discrete stages to provide a substantially uniform liquid flow to the hydrate former subsystem during the charging of the battery system. The separation of the liquid from the hydrate causes an increase in the density of the hydrate by concentrating the hydrate along the filter means. 7 figs.

  14. Effects of q-profile structure on turbulence spreading: A fluctuation intensity transport analysis

    SciTech Connect (OSTI)

    Yi, S.; Kwon, J. M.; Diamond, P. H.; Hahm, T. S.

    2014-09-15

    This paper studies effects of q-profile structure on turbulence spreading. It reports results of numerical experiments using global gyrokinetic simulations. We examine propagation of turbulence, triggered by an identical linear instability in a source region, into an adjacent, linearly stable region with variable q-profile. The numerical experiments are designed so as to separate the physics of turbulence spreading from that of linear stability. The strength of turbulence spreading is measured by the penetration depth of turbulence. Dynamics of spreading are elucidated by fluctuation intensity balance analysis, using a model intensity evolution equation which retains nonlinear diffusion and damping, and linear growth. It is found that turbulence spreading is strongly affected by magnetic shear s, but is hardly altered by the safety factor q itself. There is an optimal range of modest magnetic shear which maximizes turbulence spreading. For high to modest shear values, the spreading is enhanced by the increase of the mode correlation length with decreasing magnetic shear. However, the efficiency of spreading drops for sufficiently low magnetic shear even though the mode correlation length is comparable to that for the case of optimal magnetic shear. The reduction of spreading is attributed to the increase in time required for the requisite nonlinear mode-mode interactions. The effect of increased interaction time dominates that of increased mode correlation length. Our findings of the reduction of spreading and the increase in interaction time at weak magnetic shear are consistent with the well-known benefit of weak or reversed magnetic shear for core confinement enhancement. Weak shear is shown to promote locality, as well as stability.

  15. Fast matrix multiplication is stable

    E-Print Network [OSTI]

    Demmel, James; Holtz, Olga; Kleinberg, Robert; Dumitriu, Ioana

    2007-01-01

    Raz. On the complexity of matrix product. SIAM J. Comput. ,of fast algorithms for matrix multiplication. Num. Math. ,and Shmuel Winograd. Matrix multiplication via arithmetic

  16. Wide field imaging of distant clusters

    E-Print Network [OSTI]

    T. Treu

    2004-08-05

    Wide field imaging is key to understanding the build-up of distant clusters and their galaxy population. By focusing on the so far unexplored outskirts of clusters, where infalling galaxies first hit the cluster potential and the hot intracluster medium, we can help separate cosmological field galaxy evolution from that driven by environment. I present a selection of recent advancements in this area, with particular emphasis on Hubble Space Telescope wide field imaging, for its superior capability to deliver galaxy morphologies and precise shear maps of distant clusters.

  17. The diameter of the world wide web

    E-Print Network [OSTI]

    Reka Albert; Hawoong Jeong; Albert-Laszlo Barabasi

    1999-09-10

    Despite its increasing role in communication, the world wide web remains the least controlled medium: any individual or institution can create websites with unrestricted number of documents and links. While great efforts are made to map and characterize the Internet's infrastructure, little is known about the topology of the web. Here we take a first step to fill this gap: we use local connectivity measurements to construct a topological model of the world wide web, allowing us to explore and characterize its large scale properties.

  18. Wide Electrochemical Window Solvents - Energy Innovation Portal

    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 AdministrationRobust,Field-effectWorking WithTelecentricNCubicthe FOIA? The FOIA,DepartmentWhoWhy: TheWideWide

  19. CHARACTERIZATION OF SEVEN ULTRA-WIDE TRANS-NEPTUNIAN BINARIES

    SciTech Connect (OSTI)

    Parker, Alex H. [Department of Astronomy, University of Victoria, Victoria, BC (Canada); Kavelaars, J. J. [Herzberg Institute of Astrophysics, National Research Council of Canada, Saanich, BC (Canada); Petit, Jean-Marc [Observatoire de Besancon, Besancon (France); Jones, Lynne [Department of Astronomy, University of Washington, Seattle, WA (United States); Gladman, Brett [Department of Astronomy, University of British Columbia, Vancouver, BC (Canada); Parker, Joel, E-mail: alexhp@uvic.ca [Southwest Research Institute, Boulder, CO (United States)

    2011-12-10

    The low-inclination component of the Classical Kuiper Belt is host to a population of extremely widely separated binaries. These systems are similar to other trans-Neptunian binaries (TNBs) in that the primary and secondary components of each system are of roughly equal size. We have performed an astrometric monitoring campaign of a sample of seven wide-separation, long-period TNBs and present the first-ever well-characterized mutual orbits for each system. The sample contains the most eccentric (2006 CH{sub 69}, e{sub m} = 0.9) and the most widely separated, weakly bound (2001 QW{sub 322}, a/R{sub H} {approx_equal} 0.22) binary minor planets known, and also contains the system with lowest-measured mass of any TNB (2000 CF{sub 105}, M{sub sys} {approx_equal} 1.85 Multiplication-Sign 10{sup 17} kg). Four systems orbit in a prograde sense, and three in a retrograde sense. They have a different mutual inclination distribution compared to all other TNBs, preferring low mutual-inclination orbits. These systems have geometric r-band albedos in the range of 0.09-0.3, consistent with radiometric albedo estimates for larger solitary low-inclination Classical Kuiper Belt objects, and we limit the plausible distribution of albedos in this region of the Kuiper Belt. We find that gravitational collapse binary formation models produce an orbital distribution similar to that currently observed, which along with a confluence of other factors supports formation of the cold Classical Kuiper Belt in situ through relatively rapid gravitational collapse rather than slow hierarchical accretion. We show that these binary systems are sensitive to disruption via collisions, and their existence suggests that the size distribution of TNOs at small sizes remains relatively shallow.

  20. Evidence for wide-spread active galactic nucleus-driven outflows in the most massive z ? 1-2 star-forming galaxies

    SciTech Connect (OSTI)

    Genzel, R.; Förster Schreiber, N. M.; Rosario, D.; Lang, P.; Lutz, D.; Wisnioski, E.; Wuyts, E.; Wuyts, S.; Bandara, K.; Bender, R.; Berta, S.; Kurk, J.; Mendel, J. T.; Tacconi, L. J.; Wilman, D.; Beifiori, A.; Burkert, A.; Buschkamp, P.; Chan, J. [Max-Planck-Institut für extraterrestrische Physik (MPE), Giessenbachstr.1, D-85748 Garching (Germany); Brammer, G., E-mail: forster@mpe.mpg.de, E-mail: genzel@mpe.mpg.de [Space Telescope Science Institute, Baltimore, MD 21218 (United States); and others

    2014-11-20

    In this paper, we follow up on our previous detection of nuclear ionized outflows in the most massive (log(M {sub *}/M {sub ?}) ? 10.9) z ? 1-3 star-forming galaxies by increasing the sample size by a factor of six (to 44 galaxies above log(M {sub *}/M {sub ?}) ? 10.9) from a combination of the SINS/zC-SINF, LUCI, GNIRS, and KMOS{sup 3D}spectroscopic surveys. We find a fairly sharp onset of the incidence of broad nuclear emission (FWHM in the H?, [N II], and [S II] lines ?450-5300 km s{sup –1}), with large [N II]/H? ratios, above log(M {sub *}/M {sub ?}) ? 10.9, with about two-thirds of the galaxies in this mass range exhibiting this component. Broad nuclear components near and above the Schechter mass are similarly prevalent above and below the main sequence of star-forming galaxies, and at z ? 1 and ?2. The line ratios of the nuclear component are fit by excitation from active galactic nuclei (AGNs), or by a combination of shocks and photoionization. The incidence of the most massive galaxies with broad nuclear components is at least as large as that of AGNs identified by X-ray, optical, infrared, or radio indicators. The mass loading of the nuclear outflows is near unity. Our findings provide compelling evidence for powerful, high-duty cycle, AGN-driven outflows near the Schechter mass, and acting across the peak of cosmic galaxy formation.

  1. The Impact of Heterogeneous Thresholds on Social Contagion with Multiple Initiators

    E-Print Network [OSTI]

    Karampourniotis, Panagiotis D; Szymanski, Boleslaw K; Korniss, Gyorgy

    2015-01-01

    The threshold model is a simple but classic model of contagion spreading in complex social systems. To capture the complex nature of social influencing we investigate numerically and analytically the transition in the behavior of threshold-limited cascades in the presence of multiple initiators as the distribution of thresholds is varied between the two extreme cases of identical thresholds and a uniform distribution. We accomplish this by employing a truncated normal distribution of the nodes' thresholds and observe a non-monotonic change in the cascade size as we vary the standard deviation. Further, for a sufficiently large spread in the threshold distribution, the tipping-point behavior of the social influencing process disappears and is replaced by a smooth crossover governed by the size of initiator set. We demonstrate that for a given size of the initiator set, there is a specific variance of the threshold distribution for which an opinion spreads optimally. Furthermore, in the case of synthetic graphs...

  2. Orc Notation Structured Wide-Area Programming

    E-Print Network [OSTI]

    Misra, Jayadev

    Orc Notation Structured Wide-Area Programming Jayadev Misra Department of Computer Science University of Texas at Austin http://orc.csres.utexas.edu April 12, 2010 Rennes, France #12;Orc Notation hierarchical structure. #12;Orc Notation Orc · Goal: Internet scripting language. · Next: Component integration

  3. Experience with pipelined multiple instruction streams

    SciTech Connect (OSTI)

    Jordon, H.F.

    1984-01-01

    Pipelining has been used to implement efficient, high-speed vector computers. It is also an effective method for implementing multiprocessors. The Heterogeneous Element Processor (HEP) built by Denelcor Incorporated is the first commercially available computer system to use pipelining to implement multiple processes. This paper introduces the architecture and programming environment of the HEP and surveys a range of scientific applications programs for which parallel versions have been produced, tested, and analyzed on this computer. In all cases, the ideal of one instruction completion every pipeline step time is closely approached. Speed limitations in the parallel programs are more often a result of the extra code necessary to ensure synchronization than of actual synchronization lockout at execution time. The pipelined multiple instruction stream architecture is shown to cover a wide range of applications with good utilization of the parallel hardware.

  4. Experience with pipelined multiple instruction streams

    SciTech Connect (OSTI)

    Jordan, H.F.

    1984-01-01

    The authors introduces the architecture and programming environment of the heterogeneous element processor (HEP) and surveys a range of scientific applications programs for which parallel versions have been produced, tested, and analyzed on this computer. In all cases, the ideal of one instruction completion every pipeline step time is closely approached. Speed limitations in the parallel programs are more often a result of the extra code necessary to ensure synchronization than of actual synchronization lockout at execution time. The pipelined multiple instruction stream architecture is shown to cover a wide range of applications with good utilization of the parallel hardware. 35 references.

  5. PERSPECTIVE Navigating the multiple meanings of b diversity: a roadmap for the practicing ecologist

    E-Print Network [OSTI]

    Kraft, Nathan

    IDEA AND PERSPECTIVE Navigating the multiple meanings of b diversity: a roadmap for the practicing a roadmap of the most widely used and ecologically relevant approaches for analysis through a series

  6. WORLD WIDE WEB 2.3 Web

    E-Print Network [OSTI]

    Zabulis, Xenophon

    H I2 C WORLD WIDE WEB 1996 #12; 1. 1.1 I2 Cnet 1.2 1.3 WWW 2 2.1 2.2 2.3 Web 2.4 3 O 3.1 3.2 3.3 3.4 O Web browsers. 4. 4.1 4.2 4 File System 9.6 10 A. Web browser HTT . B A #12

  7. OBSERVATIONS OF SOLAR ENERGETIC PARTICLES FROM {sup 3}He-RICH EVENTS OVER A WIDE RANGE OF HELIOGRAPHIC LONGITUDE

    SciTech Connect (OSTI)

    Wiedenbeck, M. E.; Mason, G. M.; Haggerty, D. K; Cohen, C. M. S.; Nitta, N. V.; Gomez-Herrero, R.

    2013-01-01

    A prevailing model for the origin of {sup 3}He-rich solar energetic particle (SEP) events attributes particle acceleration to processes associated with the reconnection between closed magnetic field lines in an active region and neighboring open field lines. The open field from the small reconnection volume then provides a path along which accelerated particles escape into a relatively narrow range of angles in the heliosphere. The narrow width (standard deviation <20 Degree-Sign ) of the distribution of X-ray flare longitudes found to be associated with {sup 3}He-rich SEP events detected at a single spacecraft at 1 AU supports this model. We report multispacecraft observations of individual {sup 3}He-rich SEP events that occurred during the solar minimum time period from 2007 January through 2011 January using instrumentation carried by the two Solar Terrestrial Relations Observatory spacecraft and the Advanced Composition Explorer. We find that detections of {sup 3}He-rich events at pairs of spacecraft are not uncommon, even when their longitudinal separation is >60 Degree-Sign . We present the observations of the {sup 3}He-rich event of 2010 February 7, which was detected at all three spacecraft when they spanned 136 Degree-Sign in heliographic longitude. Measured fluences of {sup 3}He in this event were found to have a strong dependence on longitude which is well fit by a Gaussian with standard deviation {approx}48 Degree-Sign centered at the longitude that is connected to the source region by a nominal Parker spiral magnetic field. We discuss several mechanisms for distributing flare-accelerated particles over a wide range of heliographic longitudes including interplanetary diffusion perpendicular to the magnetic field, spreading of a compact cluster of open field lines between the active region and the source surface where the field becomes radial and opens out into the heliosphere, and distortion of the interplanetary field by a preceding coronal mass ejection. Statistical studies of additional {sup 3}He-rich events detected at multiple spacecraft will be needed to establish the relative importance of the various mechanisms.

  8. VR/Urban: Spread.gun Design Process and Challenges in Developing a Shared Encounter for Media Faades

    E-Print Network [OSTI]

    Hornecker, Eva

    VR/Urban: Spread.gun ­ Design Process and Challenges in Developing a Shared Encounter for Media intervention tool called Spread.gun, which was created for the Media Façade Festival 2008 in Berlin. Main social change. In this paper, we discuss our Spread.gun installation as a case study exemplifying

  9. Energy spread reduction of electron beams produced via laser wakefield acceleration

    E-Print Network [OSTI]

    Pollock, Bradley Bolt

    2012-01-01

    Chapter 5 Chapter 6 Electron Beam Energy Spread Reduction bywake?eld-accelerated electron beams,” Phys. Rev. Lett. (S. M. Hooker, “Gev electron beams from a centimetre-scale

  10. A Hidden Markov Chain Model for the Term Structure of Bond Credit Risk Spreads 

    E-Print Network [OSTI]

    Thomas, L; Allen, David E; Morkel-Kingsbury, N

    1998-01-01

    This paper provides a Markov chain model for the term structure and credit risk spreads of bond processes. It allows dependency between the stochastic process modeling the interest rate and the Markov chain process describing ...

  11. Beam energy spread in FERMI@elettra gun and linac induced by intrabeam scattering

    E-Print Network [OSTI]

    Zholents, Alexander A

    2008-01-01

    spread in FERMI@elettra gun and linac induced by intrabeamcathode area in the electron guns know in the literature asmost visible within the electron gun where the electron beam

  12. Undulator-Based Laser Wakefield Accelerator Electron Beam Energy Spread and Emittance Diagnostic

    E-Print Network [OSTI]

    Bakeman, M.S.

    2011-01-01

    Accelerator, Undulator, Electron Beam Diagnostic PACS: 52 .of an undulator-based electron beam diagnostic to be used inElectron Beam Energy Spread and Emittance Diagnostic M.S.

  13. The spread of violent civil conflict : rare state-driven, and preventable

    E-Print Network [OSTI]

    Black, Nathan Wolcott

    2012-01-01

    This dissertation advances and tests an explanation for the spread of violent civil conflict from one state to another. The fear of such "substate conflict contagion" is frequently invoked by American policymakers as a ...

  14. The tectonics and three-dimensional structure of spreading centers--microearthquake studies and tomographic inversions

    E-Print Network [OSTI]

    Toomey, Douglas R

    1987-01-01

    Two-thirds of the Earth's surface has been formed along a global system of spreading centers that are presently manifested in several different structural forms, including the classic rift valley of the Mid-Atlantic Ridge, ...

  15. Auxiliary material for Observation of the Spread of Slow Deformation in Greece Following the

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Auxiliary material for Observation of the Spread of Slow Deformation in Greece Following of Engineering Seismology and Earthquake Engineering ITSAK, P.O. Box 53, 55102 Thessaloniki, Greece 4 Université

  16. Catalysts of conflict : how refugee crises lead to the spread of civil war

    E-Print Network [OSTI]

    Lischer, Sarah Kenyon

    2002-01-01

    The spread of civil war due to refugee crises has occurred repeatedly throughout history. In some refugee crises, the sending state pursues the refugees, subjecting them to military attack. In other cases, militant exiles ...

  17. Reviewed research article Crustal deformation in Iceland: Plate spreading and earthquake

    E-Print Network [OSTI]

    Árnadóttir, Þóra

    Reviewed research article Crustal deformation in Iceland: Plate spreading and earthquake, Institute of Earth Sciences, University of Iceland, IS-101 Reykjavík, Iceland 2 Physics Department, Icelandic Meteorological Office, Reykjavík, Iceland 3 GPS Research Center, Wuhan University 129 Luoyu Road

  18. RESEARCH ARTICLE Spatial spread of an alien tree species in a heterogeneous

    E-Print Network [OSTI]

    Petite, Samuel

    RESEARCH ARTICLE Spatial spread of an alien tree species in a heterogeneous forest landscape the observed invasion patterns of an alien tree species, Prunus serotina Ehrh., in a heterogeneous managed

  19. Landau damping effects and evolutions of energy spread in small isochronous ring

    SciTech Connect (OSTI)

    Li, Yingjie [Michigan State University; Wang, Langfa [SLAC; Lin, Fanglei [JLAB

    2014-11-01

    This paper presents the Landau damping effects on the microwave instability of a coasting long bunch in an isochronous ring due to finite energy spread and emittance. Our two-dimensional (2D) dispersion relation gives more accurate predictions of the microwave instability growth rates of short-wavelength perturbations than the conventional 1D formula. The long-term evolution of energy spread is also studied by measurements and simulations.

  20. Wake fields and energy spread for the eRHIC ERL

    SciTech Connect (OSTI)

    Fedotov, A.; Kayran, D.

    2011-10-16

    Wake fields in high-current ERLs can cause significant beam quality degradations. Here we summarize effects of coherent synchrotron radiation, resistive wall, accelerating cavities and wall roughness for ERL parameters of the eRHIC project. A possibility of compensation of such correlated energy spread is also presented. An emphasis in the discussion is made on the suppression of coherent synchrotron radiation due to shielding and a possible reduction of wall roughness effects for realistic surfaces. In this report we discuss the wake fields with a focus on their effect on the energy spread of the beam. Other effects of wake fields are addressed elsewhere. An energy spread builds up during a pass though a very long beam transport in the eRHIC ERL under design. Such energy spread become important when beam is decelerated to low energy, and needs to be corrected. Several effects, such as Coherent Synchrotron Radiation (CSR), Resistive Wall (RW), accelerating RF cavities (RF) and Wall Roughness (WR) were considered. In this paper, we briefly summarize major contributions to energy spread from the wake fields for eRHIC parameters, and present possible energy spread compensation for decelerated beam. In the rest of the report we discuss effects which we believe are suppressed for the eRHIC parameters.

  1. Information Spread Over an Internet-mediated Social Network: Phases, Speed, Width, and Effects of Promotion

    E-Print Network [OSTI]

    Salvania, Abigail C

    2015-01-01

    In this study, we looked at the effect of promotion in the speed and width of spread of information on the Internet by tracking the diffusion of news articles over a social network. Speed of spread means the number of readers that the news has reached in a given time, while width of spread means how far the story has travelled from the news originator within the social network. After analyzing six stories in a 30-hour time span, we found out that the lifetime of a story's popularity among the members of the social network has three phases: Expansion, Front-page, and Saturation. Expansion phase starts when a story is published and the article spreads from a source node to nodes within a connected component of the social network. Front-page phase happens when a news aggregator promotes the story in its front page resulting to the story's faster rate of spread among the connected nodes while at the same time spreading the article to nodes outside the original connected component of the social network. Saturation...

  2. World Wide Web( WWW ) Greenberg Web

    E-Print Network [OSTI]

    Shirai, Kiyoaki

    WWW 1 World Wide Web( WWW ) WWW Web Web Greenberg Web 30% [1] Web WWW Web WWW [2] [3] WWW 2 2.1 WWW Web 1 1: · 1 · 1 #12;· Web Web 2: 2 2 Web 2.2 Web Web URL URL .html / Yahoo http://headlines.yahoo.co.jp/hl?a=2 0011205-00000101-yom-soci URL onmouseover on- mouseout JavaScript 2.1 2.3 URL URL 1. Web HTML 2. 1

  3. Concave nanomagnets with widely tunable anisotropy

    DOE Patents [OSTI]

    Lambson, Brian; Gu, Zheng; Carlton, David; Bokor, Jeffrey

    2014-07-01

    A nanomagnet having widely tunable anisotropy is disclosed. The disclosed nanomagnet is a magnetic particle with a convex shape having a first magnetically easy axis. The convex shape is modified to include at least one concavity to urge a second magnetically easy axis to form substantially offset from the first magnetically easy axis. In at least one embodiment, the convex shape is also modified to include at least one concavity to urge a second magnetically easy axis to form with a magnetic strength substantially different from the first magnetically easy axis.

  4. Wide Bandgap Semiconductors: Pursuing the Promise

    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 NaturalDukeWakefield Municipal Gas &SCE-Sessions |discussed how saving energy could betold youExamplesAofOurWide Bandgap

  5. Efficient Wide Area Data Transfer Protocols

    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 NewsInformation Current HABFES Science NetworkMediator Effects of ProtonationEfficient Wide

  6. Plant-wide Systems | 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 Bills andOrder 422.1,an R7-Compatible CumulativeSavingsPlant-wide Systems

  7. INFOGRAPHIC: Wide Bandgap Semiconductors | Department of Energy

    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 would likeUniverse (JournalvivoHighHussein KhalilResearch8 IEEE TRANSACTIONSIIILet's Get toWide

  8. Numerical simulation of air/water multiphase flows for ceramic sanitary ware design by multiple GPUs

    E-Print Network [OSTI]

    8 Numerical simulation of air/water multiphase flows for ceramic sanitary ware design by multiple and manufacturing of plumbing products such as ceramic sanitary wares. In order to re-produce the complex/water multiphase flows for ceramic sanitary ware design by multiple GPUs Being a world-wide leading company, TOTO

  9. Spreading of crude petroleum in brash ice; Effects of oil`s physical properties and water current

    SciTech Connect (OSTI)

    Sayed, M.; Kotlyar, L.S.; Sparks, B.D.

    1994-12-31

    Experiments were conducted in a refrigerated, circulating current flume to examine crude oil spreading in brash ice. Amauligak, Hibernia and Norman Wells crudes were tested. Measurements of the physical properties of the oils were also conducted, including: surface and interfacial tensions as well as viscosities. Spreading coefficients were calculated from measured surface and interfacial tensions. Results were obtained for original and weathered oils. For the spreading tests, spill volumes up to 3 liters and water currents up to 0.55 m/s were used. Tests were done using both fresh water ice and saline ice. Slick dimensions were measured, and modes of oil spreading were observed. Slick dimensions depended on oil type, but were not influenced by water current. Oils of high spreading coefficient and low viscosity spread over larger areas than those with low spreading coefficient and high viscosity.

  10. Government-Wide Diversity and Inclusion Strategic Plan (2011...

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

    Government-Wide Diversity and Inclusion Strategic Plan (2011), Office of Personnel Management Government-Wide Diversity and Inclusion Strategic Plan (2011), Office of Personnel...

  11. Proposed Energy Transport Corridors: West-wide energy corridor...

    Office of Environmental Management (EM)

    Proposed Energy Transport Corridors: West-wide energy corridor programmatic EIS, Draft Corridors - September 2007. Proposed Energy Transport Corridors: West-wide energy corridor...

  12. DOE Traineeship In Power Engineering (Leveraging Wide Bandgap...

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

    DOE Traineeship In Power Engineering (Leveraging Wide Bandgap Power Electronics) DOE Traineeship In Power Engineering (Leveraging Wide Bandgap Power Electronics) July 20, 2015 -...

  13. DOE Traineeship In Power Engineering (Leveraging Wide Bandgap...

    Office of Environmental Management (EM)

    Traineeship In Power Engineering (Leveraging Wide Bandgap Power Electronics) DOE Traineeship In Power Engineering (Leveraging Wide Bandgap Power Electronics) July 20, 2015 - 1:00pm...

  14. AMO's New Institute Focused on Wide Bandgap Power Electronics...

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

    AMO's New Institute Focused on Wide Bandgap Power Electronics Manufacturing AMO's New Institute Focused on Wide Bandgap Power Electronics Manufacturing January 15, 2014 - 11:34am...

  15. Networking and the Web World-Wide Web

    E-Print Network [OSTI]

    Lin, Ming C.

    Networking and the Web #12;World-Wide Web · Wide use of computers Web · Key components of the web ­ Computer Communica8on Networks

  16. DOE Issues Final Site-Wide Environmental Impact Statement for...

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

    Site-Wide Environmental Impact Statement for the Nevada National Security Site DOE Issues Final Site-Wide Environmental Impact Statement for the Nevada National Security Site...

  17. Effective Community-Wide Policy Technical Assistance: The NREL...

    Open Energy Info (EERE)

    Effective Community-Wide Policy Technical Assistance: The NRELDOE Approach Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Effective Community-Wide Policy Technical...

  18. Analyses Guided Optimization of Wide Range and High Efficiency...

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

    Analyses Guided Optimization of Wide Range and High Efficiency Turbocharger Compressor Analyses Guided Optimization of Wide Range and High Efficiency Turbocharger Compressor...

  19. Wide Angle Effects in Galaxy Surveys

    E-Print Network [OSTI]

    Yoo, Jaiyul

    2013-01-01

    Current and future galaxy surveys cover a large fraction of the entire sky with a significant redshift range, and the recent theoretical development shows that general relativistic effects are present in galaxy clustering on very large scales. This trend has renewed interest in the wide angle effect in galaxy clustering measurements, in which the distant-observer approximation is often adopted. Using the full wide-angle formula for computing the redshift-space correlation function, we show that compared to the sample variance, the deviation in the redshift-space correlation function from the simple Kaiser formula with the distant-observer approximation is negligible in the SDSS and is completely irrelevant in future galaxy surveys such as Euclid and the BigBOSS, if the theoretical prediction from the Kaiser formula is averaged over the survey volume and the non-uniform distribution of cosine angle between the line-of-sight and the pair separation directions is properly considered. We also find small correctio...

  20. Spectroscopic subsystems in nearby wide binaries

    E-Print Network [OSTI]

    Tokovinin, Andrei

    2015-01-01

    Radial velocity (RV) monitoring of solar-type visual binaries has been conducted at the CTIO/SMARTS 1.5-m telescope to study short-period systems. Data reduction is described, mean and individual RVs of 163 observed objects are given. New spectroscopic binaries are discovered or suspected in 17 objects, for some of them orbital periods could be determined. Subsystems are efficiently detected even in a single observation by double lines and/or by the RV difference between the components of visual binaries. The potential of this detection technique is quantified by simulation and used for statistical assessment of 96 wide binaries within 67pc. It is found that 43 binaries contain at least one subsystem and the occurrence of subsystems is equally probable in either primary or secondary components. The frequency of subsystems and their periods match the simple prescription proposed by the author (2014, AJ, 147, 87). The remaining 53 simple wide binaries with a median projected separation of 1300AU have the distri...

  1. Production of low axial energy spread ion beams with multicusp sources

    SciTech Connect (OSTI)

    Lee, Y.H.Y.

    1998-05-01

    Multicusp ion sources are capable of producing ions with low axial energy spread which are necessary in applications such as: ion projection lithography (IPL) and focused ion beams for the next generation lithographic tools and nuclear science experiments such as radioactive ion beam production. The axial ion energy spread for multicusp source is approximately 6 eV which is too large for IPL and radioactive ion beam applications. The addition of a magnetic filter which consists of a pair of permanent magnets to the multicusp source reduces the energy spread considerably. The reduction is due to the improvement in the uniformity of the axial plasma potential distribution in the discharge region. Axial ion energy spread of the filament driven ion source has been measured using three different techniques. In all cases, it was found to be less than 2 eV. Energy spread of the radio frequency (RF) driven source has also been explored, and it was found to be less than 3 eV with the proper RF-shielding. A new multicusp source configuration has been designed and constructed to further reduce the energy spread. To achieve a more uniform axial plasma potential distribution, a cylindrical magnetic filter has been designed and constructed for a 2-cm-diameter source. This new source configuration, the co-axial source, is new in its kind. The energy spread in this source has been measured to be a record low of 0.6 eV. Because of the novelty of this device, some plasma parameters inside the source have been studied. Langmuir probe has been used to measure the plasma potential, the electron temperature and the density distribution.

  2. Wide range radioactive gas concentration detector

    DOE Patents [OSTI]

    Anderson, David F. (Los Alamos, NM)

    1984-01-01

    A wide range radioactive gas concentration detector and monitor which is capable of measuring radioactive gas concentrations over a range of eight orders of magnitude. The device of the present invention is designed to have an ionization chamber which is sufficiently small to give a fast response time for measuring radioactive gases but sufficiently large to provide accurate readings at low concentration levels. Closely spaced parallel plate grids provide a uniform electric field in the active region to improve the accuracy of measurements and reduce ion migration time so as to virtually eliminate errors due to ion recombination. The parallel plate grids are fabricated with a minimal surface area to reduce the effects of contamination resulting from absorption of contaminating materials on the surface of the grids. Additionally, the ionization chamber wall is spaced a sufficient distance from the active region of the ionization chamber to minimize contamination effects.

  3. Wide band stepped frequency ground penetrating radar

    DOE Patents [OSTI]

    Bashforth, M.B.; Gardner, D.; Patrick, D.; Lewallen, T.A.; Nammath, S.R.; Painter, K.D.; Vadnais, K.G.

    1996-03-12

    A wide band ground penetrating radar system is described embodying a method wherein a series of radio frequency signals is produced by a single radio frequency source and provided to a transmit antenna for transmission to a target and reflection therefrom to a receive antenna. A phase modulator modulates those portions of the radio frequency signals to be transmitted and the reflected modulated signal is combined in a mixer with the original radio frequency signal to produce a resultant signal which is demodulated to produce a series of direct current voltage signals, the envelope of which forms a cosine wave shaped plot which is processed by a Fast Fourier Transform Unit 44 into frequency domain data wherein the position of a preponderant frequency is indicative of distance to the target and magnitude is indicative of the signature of the target. 6 figs.

  4. Wide band stepped frequency ground penetrating radar

    DOE Patents [OSTI]

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

    1996-01-01

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

  5. Imaging spectrometer wide field catadioptric design

    DOE Patents [OSTI]

    Chrisp; Michael P. (Danville, CA)

    2008-08-19

    A wide field catadioptric imaging spectrometer with an immersive diffraction grating that compensates optical distortions. The catadioptric design has zero Petzval field curvature. The imaging spectrometer comprises an entrance slit for transmitting light, a system with a catadioptric lens and a dioptric lens for receiving the light and directing the light, an immersion grating, and a detector array. The entrance slit, the system for receiving the light, the immersion grating, and the detector array are positioned wherein the entrance slit transmits light to the system for receiving the light and the system for receiving the light directs the light to the immersion grating and the immersion grating receives the light and directs the light through the system for receiving the light to the detector array.

  6. Classification of Sporadic and BRCA1 Ovarian Cancer Based on a Genome-Wide Study of Copy

    E-Print Network [OSTI]

    Classification of Sporadic and BRCA1 Ovarian Cancer Based on a Genome-Wide Study of Copy Number related ovarian cancer patients. Results: Chromosomal regions characterizing each group of sporadic and BRCA1 related ovarian cancer were gathered using multiple sample hid- den Markov Models (HMM

  7. Post-Tanner stages of droplet spreading: the energy balance approach revisited

    E-Print Network [OSTI]

    Serguei Mechkov; Anne-Marie Cazabat; Gleb Oshanin

    2009-09-10

    The spreading of a circular liquid drop on a solid substrate can be described by the time evolution of its base radius R(t). In complete wetting the quasistationary regime (far away from initial and final transients) typically obeys the so-called Tanner law, with R t^alpha_T, alpha_T=1/10. Late-time spreading may differ significantly from the Tanner law: in some cases the drop does not thin down to a molecular film and instead reaches an equilibrium pancake-like shape; in other situations, as revealed by recent experiments with spontaneously spreading nematic crystals, the growth of the base radius accelerates after the Tanner stage. Here we demonstrate that these two seemingly conflicting trends can be reconciled within a suitably revisited energy balance approach, by taking into account the line tension contribution to the driving force of spreading: a positive line tension is responsible for the formation of pancake-like structures, whereas a negative line tension tends to lengthen the contact line and induces an accelerated spreading (a transition to a faster power law for R(t) than in the Tanner stage).

  8. Multiple capillary biochemical analyzer

    DOE Patents [OSTI]

    Dovichi, Norman J. (Edmonton, CA); Zhang, Jian Z. (Edmonton, CA)

    1995-01-01

    A multiple capillary analyzer allows detection of light from multiple capillaries with a reduced number of interfaces through which light must pass in detecting light emitted from a sample being analyzed, using a modified sheath flow cuvette. A linear or rectangular array of capillaries is introduced into a rectangular flow chamber. Sheath fluid draws individual sample streams through the cuvette. The capillaries are closely and evenly spaced and held by a transparent retainer in a fixed position in relation to an optical detection system. Collimated sample excitation radiation is applied simultaneously across the ends of the capillaries in the retainer. Light emitted from the excited sample is detected by the optical detection system. The retainer is provided by a transparent chamber having inward slanting end walls. The capillaries are wedged into the chamber. One sideways dimension of the chamber is equal to the diameter of the capillaries and one end to end dimension varies from, at the top of the chamber, slightly greater than the sum of the diameters of the capillaries to, at the bottom of the chamber, slightly smaller than the sum of the diameters of the capillaries. The optical system utilizes optic fibres to deliver light to individual photodetectors, one for each capillary tube. A filter or wavelength division demultiplexer may be used for isolating fluorescence at particular bands.

  9. Multiple capillary biochemical analyzer

    DOE Patents [OSTI]

    Dovichi, N.J.; Zhang, J.Z.

    1995-08-08

    A multiple capillary analyzer allows detection of light from multiple capillaries with a reduced number of interfaces through which light must pass in detecting light emitted from a sample being analyzed, using a modified sheath flow cuvette. A linear or rectangular array of capillaries is introduced into a rectangular flow chamber. Sheath fluid draws individual sample streams through the cuvette. The capillaries are closely and evenly spaced and held by a transparent retainer in a fixed position in relation to an optical detection system. Collimated sample excitation radiation is applied simultaneously across the ends of the capillaries in the retainer. Light emitted from the excited sample is detected by the optical detection system. The retainer is provided by a transparent chamber having inward slanting end walls. The capillaries are wedged into the chamber. One sideways dimension of the chamber is equal to the diameter of the capillaries and one end to end dimension varies from, at the top of the chamber, slightly greater than the sum of the diameters of the capillaries to, at the bottom of the chamber, slightly smaller than the sum of the diameters of the capillaries. The optical system utilizes optic fibers to deliver light to individual photodetectors, one for each capillary tube. A filter or wavelength division demultiplexer may be used for isolating fluorescence at particular bands. 21 figs.

  10. Simultaneous boiling and spreading of liquefied petroleum gas on water. Final report, December 12, 1978-March 31, 1981

    SciTech Connect (OSTI)

    Chang, H.R.; Reid, R.C.

    1981-04-01

    An experimental and theoretical investigation was carried out to study the boiling and spreading of liquid nitrogen, liquid methane and liquefied petroleum gas (LPG) on water in a one-dimensional configuration. Primary emphasis was placed on the LPG studies. Experimental work involved the design and construction of a spill/spread/boil apparatus which permitted the measurement of spreading and local boil-off rates. With the equations of continuity and momentum transfer, a mathematical model was developed to describe the boiling-spreading phenomena of cryogens spilled on water. The model accounted for a decrease in the density of the cryogenic liquid due to bubble formation. The boiling and spreading rates of LPG were found to be the same as those of pure propane. An LPG spill was characterized by the very rapid and violent boiling initially and highly irregular ice formation on the water surface. The measured local boil-off rates of LPG agreed reasonably well with theoretical predictions from a moving boundary heat transfer model. The spreading velocity of an LPG spill was found to be constant and determined by the size of the distributor opening. The maximum spreading distance was found to be unaffected by the spilling rate. These observations can be explained by assuming that the ice formation on the water surface controls the spreading of LPG spills. While the mathematical model did not predict the spreading front adequately, it predicted the maximum spreading distance reasonably well.

  11. Melt spreading code assessment, modifications, and application to the EPR core catcher design.

    SciTech Connect (OSTI)

    Farmer, M. T .; Nuclear Engineering Division

    2009-03-30

    The Evolutionary Power Reactor (EPR) is under consideration by various utilities in the United States to provide base load electrical production, and as a result the design is undergoing a certification review by the U.S. Nuclear Regulatory Commission (NRC). The severe accident design philosophy for this reactor is based upon the fact that the projected power rating results in a narrow margin for in-vessel melt retention by external cooling of the reactor vessel. As a result, the design addresses ex-vessel core melt stabilization using a mitigation strategy that includes: (1) an external core melt retention system to temporarily hold core melt released from the vessel; (2) a layer of 'sacrificial' material that is admixed with the melt while in the core melt retention system; (3) a melt plug in the lower part of the retention system that, when failed, provides a pathway for the mixture to spread to a large core spreading chamber; and finally, (4) cooling and stabilization of the spread melt by controlled top and bottom flooding. The overall concept is illustrated in Figure 1.1. The melt spreading process relies heavily on inertial flow of a low-viscosity admixed melt to a segmented spreading chamber, and assumes that the melt mass will be distributed to a uniform height in the chamber. The spreading phenomenon thus needs to be modeled properly in order to adequately assess the EPR design. The MELTSPREAD code, developed at Argonne National Laboratory, can model segmented, and both uniform and nonuniform spreading. The NRC is thus utilizing MELTSPREAD to evaluate melt spreading in the EPR design. MELTSPREAD was originally developed to support resolution of the Mark I containment shell vulnerability issue. Following closure of this issue, development of MELTSPREAD ceased in the early 1990's, at which time the melt spreading database upon which the code had been validated was rather limited. In particular, the database that was utilized for initial validation consisted of: (1) comparison to an analytical solution for the dam break problem, (2) water spreading tests in a 1/10 linear scale model of the Mark I containment by Theofanous et al., and (3) steel spreading tests by Suzuki et al. that were also conducted in a geometry similar to the Mark I. The objective of this work was to utilize the MELTSPREAD code to check the assumption of uniform melt spreading in the EPR core catcher design. As a starting point for the project, the code was validated against the worldwide melt spreading database that emerged after the code was originally written in the very early 1990's. As part of this exercise, the code was extensively modified and upgraded to incorporate findings from these various analytical and experiment programs. In terms of expanding the ability of the code to analyze various melt simulant experiments, the options to input user-specified melt and/or substrate material properties was added. The ability to perform invisicid and/or adiabatic spreading analysis was also added so that comparisons with analytical solutions and isothermal spreading tests could be carried out. In terms of refining the capability to carry out reactor material melt spreading analyses, the code was upgraded with a new melt viscosity model; the capability was added to treat situations in which solid fraction buildup between the liquidus-solidus is non-linear; and finally, the ability to treat an interfacial heat transfer resistance between the melt and substrate was incorporated. This last set of changes substantially improved the predictive capability of the code in terms of addressing reactor material melt spreading tests. Aside from improvements and upgrades, a method was developed to fit the model to the various melt spreading tests in a manner that allowed uncertainties in the model predictions to be statistically characterized. With these results, a sensitivity study was performed to investigate the assumption of uniform spreading in the EPR core catcher that addressed parametric variations in: (1) melt pour mass, (2) melt composition, (3) me

  12. Genetics of primary progressive multiple sclerosis

    E-Print Network [OSTI]

    Cree, BAC

    2014-01-01

    for association with multiple sclerosis in a N. Irish casepolymorphisms and multiple sclerosis in Northern Ireland. Jclinical course of multiple sclerosis. Neurology 68: 376–

  13. Lectin complement activation pathway in multiple sclerosis

    E-Print Network [OSTI]

    Rana, Puneet Vinod

    2012-01-01

    The pathology of multiple sclerosis is location-dependent:and management of multiple sclerosis. Am. Fam. Physician.interactions in multiple sclerosis: innate and adaptive

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

    DOE Patents [OSTI]

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

    2014-10-14

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

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

    DOE Patents [OSTI]

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

    2014-05-20

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

  16. Methods and apparatuses for self-generating fault-tolerant keys in spread-spectrum systems

    DOE Patents [OSTI]

    Moradi, Hussein; Farhang, Behrouz; Subramanian, Vijayarangam

    2015-12-15

    Self-generating fault-tolerant keys for use in spread-spectrum systems are disclosed. At a communication device, beacon signals are received from another communication device and impulse responses are determined from the beacon signals. The impulse responses are circularly shifted to place a largest sample at a predefined position. The impulse responses are converted to a set of frequency responses in a frequency domain. The frequency responses are shuffled with a predetermined shuffle scheme to develop a set of shuffled frequency responses. A set of phase differences is determined as a difference between an angle of the frequency response and an angle of the shuffled frequency response at each element of the corresponding sets. Each phase difference is quantized to develop a set of secret-key quantized phases and a set of spreading codes is developed wherein each spreading code includes a corresponding phase of the set of secret-key quantized phases.

  17. Methods and apparatuses for self-generating fault-tolerant keys in spread-spectrum systems

    DOE Patents [OSTI]

    Moradi, Hussein; Farhang, Behrouz; Subramanian, Vijayarangam

    2015-12-22

    Self-generating fault-tolerant keys for use in spread-spectrum systems are disclosed. At a communication device, beacon signals are received from another communication device and impulse responses are determined from the beacon signals. The impulse responses are circularly shifted to place a largest sample at a predefined position. The impulse responses are converted to a set of frequency responses in a frequency domain. The frequency responses are shuffled with a predetermined shuffle scheme to develop a set of shuffled frequency responses. A set of phase differences is determined as a difference between an angle of the frequency response and an angle of the shuffled frequency response at each element of the corresponding sets. Each phase difference is quantized to develop a set of secret-key quantized phases and a set of spreading codes is developed wherein each spreading code includes a corresponding phase of the set of secret-key quantized phases.

  18. Use of incomplete energy recovery for the energy compression of large energy spread charged particle beams

    DOE Patents [OSTI]

    Douglas, David R. (Newport News, VA); Benson, Stephen V. (Yorktown, VA)

    2007-01-23

    A method of energy recovery for RF-base linear charged particle accelerators that allows energy recovery without large relative momentum spread of the particle beam involving first accelerating a waveform particle beam having a crest and a centroid with an injection energy E.sub.o with the centroid of the particle beam at a phase offset f.sub.o from the crest of the accelerating waveform to an energy E.sub.full and then recovering the beam energy centroid a phase f.sub.o+Df relative to the crest of the waveform particle beam such that (E.sub.full-E.sub.o)(1+cos(f.sub.o+Df))>dE/2 wherein dE=the full energy spread, dE/2=the full energy half spread and Df=the wave form phase distance.

  19. The Hubble Wide Field Camera 3 Test of Surfaces in the Outer Solar System: Spectral Variation on Kuiper Belt Objects

    E-Print Network [OSTI]

    Fraser, Wesley C; Glass, Florian

    2015-01-01

    Here we present additional photometry of targets observed as part of the Hubble Wide Field Camera 3 Test of Surfaces in the Outer Solar System. 12 targets were re-observed with the Wide Field Camera 3 in optical and NIR wavebands designed to compliment those used during the first visit. Additionally, all observations originally presented by Fraser and Brown (2012) were reanalyzed through the same updated photometry pipeline. A reanalysis of the optical and NIR colour distribution reveals a bifurcated optical colour distribution and only two identifiable spectral classes, each of which occupies a broad range of colours and have correlated optical and NIR colours, in agreement with our previous findings. We report the detection of significant spectral variations on 5 targets which cannot be attributed to photometry errors, cosmic rays, point spread function or sensitivity variations, or other image artifacts capable of explaining the magnitude of the variation. The spectrally variable objects are found to have ...

  20. Predictive study on the risk of malaria spreading due to global warming

    SciTech Connect (OSTI)

    Ono, Masaji

    1996-12-31

    Global warming will bring about a temperature elevation, and the habitat of vectors of infectious diseases, such as malaria and dengue fever, will spread into subtropical or temperate zone. The purpose of this study is to simulate the spreading of these diseases through reexamination of existing data and collection of some additional information by field survey. From these data, the author will establish the relationship between meteorological conditions, vector density and malaria occurrence. And then he will simulate and predict the malaria epidemics in case of temperature elevation in southeast Asia and Japan.

  1. Laminin isoforms differentially regulate adhesion, spreading, proliferation, and ERK activation of h1 integrin-null cells

    E-Print Network [OSTI]

    Campbell, Kevin P.

    Laminin isoforms differentially regulate adhesion, spreading, proliferation, and ERK activation signal-regulated kinase (ERK) activation, whereas all these responses occurred in response to adhesion

  2. Performance Modeling of a Wide Field Ground Layer Adaptive Optics System

    E-Print Network [OSTI]

    D. Andersen; J. Stoesz; S. Morris; M. Lloyd-Hart; D. Crampton; T. Butterley; B. Ellerbroek; L. Jollissaint; N. M. Milton; R. Myers; K. Szeto; A. Tokovinin; J. -P. Veran; R. Wilson

    2006-10-03

    Using five independent analytic and Monte Carlo simulation codes, we have studied the performance of wide field ground layer adaptive optics (GLAO), which can use a single, relatively low order deformable mirror to correct the wavefront errors from the lowest altitude turbulence. GLAO concentrates more light from a point source in a smaller area on the science detector, but unlike traditional adaptive optics, images do not become diffraction-limited. Rather the GLAO point spread function (PSF) has the same functional form as a seeing-limited PSF, and can be characterized by familiar performance metrics such as Full-Width Half-Max (FWHM). The FWHM of a GLAO PSF is reduced by 0.1" or more for optical and near-infrared wavelengths over different atmospheric conditions. For the Cerro Pachon atmospheric model this correction is even greater when the image quality is worst, which effectively eliminates "bad-seeing" nights; the best seeing-limited image quality, available only 20% of the time, can be achieved 60 to 80% of the time with GLAO. This concentration of energy in the PSF will reduce required exposure times and improve the efficiency of an observatory up to 30 to 40%. These performance gains are relatively insensitive to a number of trades including the exact field of view of a wide field GLAO system, the conjugate altitude and actuator density of the deformable mirror, and the number and configuration of the guide stars.

  3. Relations between elliptic multiple zeta values and a special derivation algebra

    E-Print Network [OSTI]

    Broedel, Johannes; Schlotterer, Oliver

    2015-01-01

    We investigate relations between elliptic multiple zeta values and describe a method to derive the number of indecomposable elements of given weight and length. Our method is based on representing elliptic multiple zeta values as iterated integrals over Eisenstein series and exploiting the connection with a special derivation algebra. Its commutator relations give rise to constraints on the iterated integrals over Eisenstein series relevant for elliptic multiple zeta values and thereby allow to count the indecomposable representatives. Conversely, the above connection suggests apparently new relations in the derivation algebra. Under https://tools.aei.mpg.de/emzv we provide relations for elliptic multiple zeta values over a wide range of weights and lengths.

  4. Design of Controllers for a Multiple Input Multiple Output System 

    E-Print Network [OSTI]

    Harris, Amanda Lynne

    2012-07-16

    A method of controller design for multiple input multiple output (MIMO) system is needed that will not give the high order controllers of modern control theory but will be more systematic than the “ad hoc” method. The objective of this method...

  5. 1 Spreading and convective dissolution of carbon dioxide in vertically 2 confined, horizontal aquifers

    E-Print Network [OSTI]

    Neufeld, Jerome A.

    1 Spreading and convective dissolution of carbon dioxide in vertically 2 confined, horizontal] Injection of carbon dioxide (CO2) into saline aquifers is a promising tool for reducing 6 anthropogenic CO2 emissions. At reservoir conditions, the injected CO2 is buoyant relative 7 to the ambient groundwater

  6. Spreading and convective dissolution of carbon dioxide in vertically confined, horizontal aquifers

    E-Print Network [OSTI]

    Huppert, Herbert

    Spreading and convective dissolution of carbon dioxide in vertically confined, horizontal aquifers of carbon dioxide (CO2) into saline aquifers is a promising tool for reducing anthropogenic CO2 emissions. At reservoir conditions, the injected CO2 is buoyant relative to the ambient groundwater. The buoyant plume

  7. ORIGINAL PAPER Predicting regional spread of non-native species using

    E-Print Network [OSTI]

    Dhindsa, Rajinder

    that are transported by ocean currents. Given the importance of currents in steering these propagules, ocean- ographic- ingly made use of oceanographic circulation models to estimate currents and track species dispersal models designed to estimate and forecast currents could be valuable for forecasting the spread (Queiroga

  8. EXPERIMENTAL STUDY OF ENERGY SPREAD IN A SPACE-CHARGE DOMINATED ELECTRON BEAM *

    E-Print Network [OSTI]

    Valfells, Ágúst

    EXPERIMENTAL STUDY OF ENERGY SPREAD IN A SPACE-CHARGE DOMINATED ELECTRON BEAM * Y. Cui , Y. Zou, A. Experimental Setup Electron Beam Ground Shielding High Voltage Cylinder Retarding Mesh Collector High Voltage. Valfells, I. Haber, R. Kishek, M. Reiser, P. G. O'Shea Institute for Research in Electronics and Applied

  9. Assessing fire risk using Monte Carlo simulations of fire spread Yohay Carmel a,

    E-Print Network [OSTI]

    Assessing fire risk using Monte Carlo simulations of fire spread Yohay Carmel a, *, Shlomit Paz b of Haifa, Haifa, Israel 1. Introduction Fires are a major source of forest destruction in the Mediterranean., 2000). Mediterranean fires are largely determined by climatic conditions; long, dry summers with high

  10. Spreading of the Free Boundary of an Ideal Fluid in a Vacuum

    E-Print Network [OSTI]

    Bigelow, Stephen

    Spreading of the Free Boundary of an Ideal Fluid in a Vacuum Thomas C. Sideris Department by an ideal fluid surrounded by vacuum will be shown to grow linearly in time provided the pressure an ideal fluid occupying a bounded region in space surrounded by vacuum. The boundary of this region

  11. Job Opportunities through Entertainment: Virally Spread Speech-Based Services for Low-Literate Users

    E-Print Network [OSTI]

    Lahore Uni. of Mgmt. Sciences Lahore, Pakistan {farhan.haq, zain.tariq, umar}@lums.edu.pk ABSTRACT We in 2011, we report on its first large-scale sustained deployment. In 24/7 operation in Pakistan since May among low- skilled office workers in Lahore, Pakistan, in 3 weeks Polly spread to 2,000 users and logged

  12. The reciprocity properties of geometrical spreading Roel Snieder1,2

    E-Print Network [OSTI]

    Snieder, Roel

    , the acoustic wave equation or the elastic wave equation satisfy reciprocity. This implies that when a point-geometric approximation of the acoustic wave equation satis¢es reciprocity. The analysis is based on the equations for the geometrical spreading for the acoustic wave equation therefore also hold for the elastic wave equation

  13. Dynamics of capillary spreading along hydrophilic microstripes Anton A. Darhuber and Sandra M. Troian*

    E-Print Network [OSTI]

    Troian, Sandra M.

    interesting approaches for fluid migration and flow control in confining networks. The capillary spreading of liquids on corrugated surfaces can be enhanced by capillary migration and wicking into narrow surface speed as a function of distance is proportional to the groove depth 12,15 . In this paper we consider

  14. Block Spreading for MUI/ISI-Resilient Generalized Multi-carrier CDMA with Multirate Capabilities

    E-Print Network [OSTI]

    Giannakis, Georgios

    1 of 5 Block Spreading for MUI/ISI-Resilient Generalized Multi-carrier CDMA with Multirate) and intersymbol interference (ISI) arising due to wireless multipath propagation, motivate well multirate wideband Quality of Service (QoS) and rate- scalability, have low complexity, and exhibit resilience to MUI and ISI

  15. Recent Advances in Modelling of Liquefaction and Lateral Spreading S.P.G. Madabhushi*

    E-Print Network [OSTI]

    Haigh, Stuart

    59 Recent Advances in Modelling of Liquefaction and Lateral Spreading S.P.G. Madabhushi* , B Teymur, SK Haigh and AJ Brennan Department of Engineering, Schofield Centrifuge Centre, University of Cambridge, CB2 1PZ, UNITED KINGDOM, mspg1@eng.cam.ac.uk Use of geotechnical centrifuges to investigate

  16. A simple bioclogging model that accounts for spatial spreading of bacteria

    E-Print Network [OSTI]

    Demaret, Laurent

    A simple bioclogging model that accounts for spatial spreading of bacteria HJ Eberla , L Demaretb is presented that accounts for spatial expansion of the bacterial popu- lation in the soil. The bacteria move harmful environ- mental factors and mechanical washout. Naturally occurring bacteria are a major

  17. Yarkovsky-Driven Spreading of the Eureka Family of Mars Trojans Matija Cuk1

    E-Print Network [OSTI]

    Yarkovsky-Driven Spreading of the Eureka Family of Mars Trojans Matija ´Cuk1 , Apostolos A orbital grouping that was affected by a negative acceleration (i.e. one against the orbital motion above about 25 (Murray and Dermott, 1999). In our Solar System, only Jupiter, Neptune and Mars are known

  18. LONG EXPOSURE POINT SPREAD FUNCTION ESTIMATION FROM SOLAR ADAPTIVE OPTICS LOOP DATA

    E-Print Network [OSTI]

    Astronomer, National Solar Observatory, New Mexico, USA Dr. Haimin Wang, Dissertation Co-Advisor DateABSTRACT LONG EXPOSURE POINT SPREAD FUNCTION ESTIMATION FROM SOLAR ADAPTIVE OPTICS LOOP DATA during solar observations due to the lack of point sources in the field-of-view. Moreover, the highly

  19. EECE 595: SPREAD SPECTRUM COMMUNICATIONS 1 Distributed Power Control in CDMA Cellular

    E-Print Network [OSTI]

    station will corrupt the other signals. Another reason for power control is the battery life time. High of each mobile station. The transmission power of the mobile stations is determined solely on localEECE 595: SPREAD SPECTRUM COMMUNICATIONS 1 Distributed Power Control in CDMA Cellular System Aly El

  20. FireStream: Sensor Stream Processing for Monitoring Fire Spread Venkatesh Raghavan1

    E-Print Network [OSTI]

    locations required for spatial analysis, the Sen- sor Store, a collection of metadata pertinent to sensorsFireStream: Sensor Stream Processing for Monitoring Fire Spread Venkatesh Raghavan1 , ElkeStream, a sensor stream processing system which provides services for run-time de- tection, monitoring

  1. Lifeasweknowit To understand the human genome, researchers must spread their wings to all branches of life.

    E-Print Network [OSTI]

    Pratt, Vaughan

    and a worm to its ENCODE project, which aims to catalogue all the functional parts of the human genome is moving more forcefully into purely human genomics. The biggest new projects recently announcedLifeasweknowit To understand the human genome, researchers must spread their wings to all branches

  2. New Florida Cattle Identification Program to Protect Florida's Cattle Industry; Mitigate Spread of Disease

    E-Print Network [OSTI]

    Hill, Jeffrey E.

    New Florida Cattle Identification Program to Protect Florida's Cattle Industry; Mitigate Spread. In the past, Florida cattle have struggled with animal disease outbreaks, such as Brucellosis and Tuberculosis and those diseases, present in other states, still threaten our cattle today. The Florida Department

  3. Successful spread of a biocontrol agent reveals a biosecurity failure: elucidating long distance invasion pathways

    E-Print Network [OSTI]

    Hoddle, Mark S.

    Successful spread of a biocontrol agent reveals a biosecurity failure: elucidating long distance to successful invasion. In this study, the dispersal of a classical biological control agent, the mymarid egg. Survey results suggest that invasive orga- nisms, like deliberately released biological control agents

  4. Observation of the spread of slow deformation in Greece following the breakup of the slab

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Observation of the spread of slow deformation in Greece following the breakup of the slab Virginie Engineering, ITSAK, Thessaloniki, Greece, 4 Université de Savoie, ISTerre, Le Bourget du Lac, France, 5 analyze here a "storm" of earthquakes in Greece and show that their interaction provides remarkable

  5. The Power of a Good Idea: Quantitative Modeling of the Spread of Ideas from Epidemiological Models

    SciTech Connect (OSTI)

    Bettencourt, L. M. A. (LANL); Cintron-Arias, A. (Cornell University); Kaiser, D. I. (MIT); Castillo-Chavez, C. (Arizona State University)

    2005-05-05

    The population dynamics underlying the diffusion of ideas hold many qualitative similarities to those involved in the spread of infections. In spite of much suggestive evidence this analogy is hardly ever quantified in useful ways. The standard benefit of modeling epidemics is the ability to estimate quantitatively population average parameters, such as interpersonal contact rates, incubation times, duration of infectious periods, etc. In most cases such quantities generalize naturally to the spread of ideas and provide a simple means of quantifying sociological and behavioral patterns. Here we apply several paradigmatic models of epidemics to empirical data on the advent and spread of Feynman diagrams through the theoretical physics communities of the USA, Japan, and the USSR in the period immediately after World War II. This test case has the advantage of having been studied historically in great detail, which allows validation of our results. We estimate the effectiveness of adoption of the idea in the three communities and find values for parameters reflecting both intentional social organization and long lifetimes for the idea. These features are probably general characteristics of the spread of ideas, but not of common epidemics.

  6. Examination of wind speed thresholds for vorticity-driven lateral fire spread

    E-Print Network [OSTI]

    Evans, Jason

    , to specifically consider the effect of wind speed in generating the fire-induced vorticity necessary to drive wind speed, below which the prevailing winds are too weak to drive the vorticity-generating interactionExamination of wind speed thresholds for vorticity-driven lateral fire spread J.J. Sharples a , C

  7. Surprising spread of volcanic ash key to solving Earth's mysteries: U of A grad

    E-Print Network [OSTI]

    Wang, Hao "Howard"

    Surprising spread of volcanic ash key to solving Earth's mysteries: U of A grad EDMONTON Volcanic ash, which can provide valuable snapshots of Earth's history, appears to drift much farther than of science that uses layers of "tephra," or ash, to link and date events in Earth's history. When a volcano

  8. A Spreading Activation Framework for Ontology-enhanced Adaptive Information Access

    E-Print Network [OSTI]

    A Spreading Activation Framework for Ontology-enhanced Adaptive Information Access Md Maruf Hasan for Ontology-enhanced Adaptive Information Access Md Maruf Hasan, Enrico Motta, John B. Domingue, Simon. Expert's feedback is captured and the network weights are continuously adapted. This framework

  9. Wakefield Induced Correlated Energy Spread and Emittance Growth at TTF FEL

    E-Print Network [OSTI]

    1 Wakefield Induced Correlated Energy Spread and Emittance Growth at TTF FEL Feng ZHOU DESY) at DESY. During FEL operations, the longitudinal and transverse wakefields which are generated by vacuum and emittance growth at the TTF FEL of phase I and II. 1 Introduction The Free Electron Laser at the TESLA Test

  10. Chemical Wave Packet Propagation, Reflection, and Spreading Lingfa Yang and Irving R. Epstein*

    E-Print Network [OSTI]

    Epstein, Irving R.

    or away from an initiating perturbation, are found in a reaction-diffusion model with a finite wave. The phase velocity, group velocity, and spreading velocity calculated by linear stability analysis packets in reaction-diffusion systems are rarely seen, even though wave packets have been intensively

  11. Chemical Wave Packet Propagation, Reflection, and Spreading Lingfa Yang and Irving R. Epstein*

    E-Print Network [OSTI]

    Yang, Lingfa

    Chemical Wave Packet Propagation, Reflection, and Spreading Lingfa Yang and Irving R. Epstein 02454-9110 ReceiVed: May 8, 2002; In Final Form: July 10, 2002 Chemical waves can travel in well-defined packets. Two types of phase wave packets, distinguished by whether their component waves move toward

  12. Icelandic rhythmics: Annual modulation of land elevation and plate spreading by snow load

    E-Print Network [OSTI]

    Grapenthin, Ronni

    Icelandic rhythmics: Annual modulation of land elevation and plate spreading by snow load Ronni to annual snow load in Iceland. The load is modeled using Green's functions for an elastic halfspace and a simple sinusoidal load history on Iceland's four largest ice caps. We derive E = 40 ± 15 GPa as a minimum

  13. Energy Loss and Energy Spread Growth in a Planar Undulator(LCC-0086)

    SciTech Connect (OSTI)

    Sheppard, J

    2003-10-07

    The change in beam energy spread due to transmission through a long, planar undulator is calculated. This change is shown to be gaussian as expected from the central limit theorem and large number of photons emitted per electron. These results are compared with Saldin et al. [2] expressions. Numerical results for the case of the TESLA beam and for an NLC beam are given.

  14. ORIGINAL PAPER Species diversity and drivers of spread of alien fungi

    E-Print Network [OSTI]

    ORIGINAL PAPER Species diversity and drivers of spread of alien fungi (sensu lato) in Europe February 2009 Ó Springer Science+Business Media B.V. 2009 Abstract A first comprehensive inventory of alien at the two spatial scales. Some taxonomic/phylogenetic orders were shown to be over-represented in alien

  15. Spreading of EGF Receptor Activity into EGF-free Regions and Molecular Therapies of Cancer

    E-Print Network [OSTI]

    Garrit Jentsch; Reiner Kree

    2008-03-18

    The primary activation of the epidermal growth factor receptor (EGFR) has become a prominent target for molecular therapies against several forms of cancer. But despite considerable progress during the last years, many of its aspects remain poorly understood. Experiments on lateral spreading of receptor activity into ligand-free regions challenge the current standard models of EGFR activation. Here, we propose and study a theoretical model, which explains spreading into ligand-free regions without introducing any new, unknown kinetic parameters. The model exhibits bistability of activity, induced by a generic reaction mechanism, which consists of activation via dimerization and deactivation via a Michaelis-Menten reaction. It possesses slow propagating front solutions and faster initial transients. We analyze relevant experiments and find that they are in quantitative accordance with the fast initial modes of spreading, but not with the slow propagating front. We point out that lateral spreading of activity is linked to pathological levels of persistent receptor activity as observed in cancer cells and exemplify uses of this link for the design and quick evaluation of molecular therapies targeting primary activation of EGFR.

  16. Observational Estimates of Entrainment and Vertical Salt Flux in the Interior of a Spreading River Plume

    E-Print Network [OSTI]

    MacCready, Parker

    Observational Estimates of Entrainment and Vertical Salt Flux in the Interior of a Spreading River@ocean.washington.edu #12;Abstract: Observational estimates of entrainment and vertical salt flux into the tidally- pulsed are used to determine the plume depth and entrainment velocity throughout the experiment. This approach

  17. Hurricane Activity and the Large-Scale Pattern of Spread of an Invasive Plant Species

    E-Print Network [OSTI]

    Cronin, James T.

    Hurricane Activity and the Large-Scale Pattern of Spread of an Invasive Plant Species Ganesh P of invasive species. However, the effects of large-scale disturbances, such as hurricanes and tropical storms. australis stands expanded in size by 6­35% per year. Based on tropical storm and hurricane activity over

  18. Multiple stage railgun

    DOE Patents [OSTI]

    Hawke, Ronald S. (Livermore, CA); Scudder, Jonathan K. (Pleasanton, CA); Aaland, Kristian (Livermore, CA)

    1982-01-01

    A multiple stage magnetic railgun accelerator (10) for accelerating a projectile (15) by movement of a plasma arc (13) along the rails (11,12). The railgun (10) is divided into a plurality of successive rail stages (10a-n) which are sequentially energized by separate energy sources (14a-n) as the projectile (15) moves through the bore (17) of the railgun (10). Propagation of energy from an energized rail stage back towards the breech end (29) of the railgun (10) can be prevented by connection of the energy sources (14a-n) to the rails (11,12) through isolation diodes (34a-n). Propagation of energy from an energized rail stage back towards the breech end of the railgun can also be prevented by dividing the rails (11,12) into electrically isolated rail sections (11a-n, 12a-n). In such case means (55a-n) are used to extinguish the arc at the end of each energized stage and a fuse (31) or laser device (61) is used to initiate a new plasma arc in the next energized rail stage.

  19. Meta-analysis of genome scans and replication identify CD6, IRF8 and TNFRSF1A as new multiple sclerosis

    E-Print Network [OSTI]

    de Bakker, Paul

    -analysis of genome-wide association scans for multiple sclerosis (MS) susceptibility that includes 2,624 subjects-response pathway genes in subjects with MS. Multiple sclerosis is thought to emerge when genetically susceptibleMeta-analysis of genome scans and replication identify CD6, IRF8 and TNFRSF1A as new multiple

  20. The resonance absorption probability function for neutron and multiplicative integral

    E-Print Network [OSTI]

    V. D. Rusov; V. A. Tarasov; S. I. Kosenko; S. A. Chernegenko

    2012-08-05

    The analytical approximations for the moderating neutrons flux density like Fermi spectra, widely used in reactor physics, involve the probability function for moderating neutron to avoid the resonant absorption obtained using some restrictive assumptions regarding the acceptable resonances width. By means of multiplicative integral (Volterra integral) theory for a commutative algebra an analytical expression for the probability function is obtained rigorously without any restrictive assumptions.

  1. ECONOMIC IMPACTS OF A WIDE AREA RELEASE OF ANTHRAX

    E-Print Network [OSTI]

    ECONOMIC IMPACTS OF A WIDE AREA RELEASE OF ANTHRAX May 2009 Prepared Regional Technology Center for Homeland Security Economic Impacts of a Wide Area Release of Anthrax KS .................................................................................................................................................. 1 Categories of Economic Impacts

  2. PERSPECTIVE Navigating the multiple meanings of b diversity: a roadmap for the practicing Marti J. Anderson,1

    E-Print Network [OSTI]

    Inouye, Brian

    IDEA AND PERSPECTIVE Navigating the multiple meanings of b diversity: a roadmap for the practicing a roadmap of the most widely used and ecologically relevant approaches for analysis through a series

  3. Evidence of thermonuclear flame spreading on neutron stars from burst rise oscillations

    SciTech Connect (OSTI)

    Chakraborty, Manoneeta; Bhattacharyya, Sudip E-mail: sudip@tifr.res.in

    2014-09-01

    Burst oscillations during the rising phases of thermonuclear X-ray bursts are usually believed to originate from flame spreading on the neutron star surface. However, the decrease of fractional oscillation amplitude with rise time, which provides a main observational support for the flame spreading model, have so far been reported from only a few bursts. Moreover, the non-detection and intermittent detections of rise oscillations from many bursts are not yet understood considering the flame spreading scenario. Here, we report the decreasing trend of fractional oscillation amplitude from an extensive analysis of a large sample of Rossi X-ray Timing Explorer Proportional Counter Array bursts from 10 neutron star low-mass X-ray binaries. This trend is 99.99% significant for the best case, which provides, to the best of our knowledge, by far the strongest evidence of such a trend. Moreover, it is important to note that an opposite trend is not found in any of the bursts. The concave shape of the fractional amplitude profiles for all the bursts suggests latitude-dependent flame speeds, possibly due to the effects of the Coriolis force. We also systematically study the roles of low fractional amplitude and low count rate for non-detection and intermittent detections of rise oscillations, and attempt to understand them within the flame spreading scenario. Our results support a weak turbulent viscosity for flame spreading, and imply that burst rise oscillations originate from an expanding hot spot, thus making these oscillations a more reliable tool to constrain the neutron star equations of state.

  4. Wide Area Thermal Processing of Light Emitting Materials

    SciTech Connect (OSTI)

    Duty, Chad E; Joshi, Pooran C; Jellison Jr, Gerald Earle; Angelini, Joseph Attilio; Sabau, Adrian S

    2011-10-01

    Laboratory laser materials synthesis of wide bandgap materials has been successfully used to create white light emitting materials (LEMs). This technology development has progressed to the exploration on design and construction of apparatus for wide area doping and phase transformation of wide bandgap material substrates. The objective of this proposal is to develop concepts for wide area doping and phase transformation based on AppliCote Associates, LLC laser technology and ORNL high density pulsed plasma arc technology.

  5. Implementing a Student Allele Database via the World Wide Web

    E-Print Network [OSTI]

    Newberg, Heidi

    Implementing a Student Allele Database via the World Wide Web (Extended Abstract) Lee A. Newberg the World-Wide Web. The electronic lab bench is 80% complete at the time of this writing and can be found and implementation of the Student Allele Database Facility and its interface via the World-Wide Web

  6. World Wide Web Internet and Web Information Systems

    E-Print Network [OSTI]

    Cao, Longbing

    1 23 World Wide Web Internet and Web Information Systems ISSN 1386-145X World Wide Web DOI 10's request, provided it is not made publicly available until 12 months after publication. #12;World Wide Web worlds. Its detection is a typical use case of the broad-based Wisdom Web of Things (W2T) methodology

  7. Plant-Wide Waste Management. 2. Decision Making under Uncertainty

    E-Print Network [OSTI]

    Linninger, Andreas A.

    Plant-Wide Waste Management. 2. Decision Making under Uncertainty Aninda Chakraborty and Andreas A of Illinois at Chicago, Chicago, Illinois 60607 The synthesis and optimization of plant-wide waste management flowsheet produces a superstructure that embeds all plant-wide waste management policies. In the subsequent

  8. Spark Spread

    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 RoomPreservation ofAlbuquerque|SensitiveApril 2, 2014 Smith Named asInitiativesApache SparkSpark

  9. Generation of tsunamis by a slowly spreading uplift of the sea oor Maria I. Todorovska*, Mihailo D. Trifunac

    E-Print Network [OSTI]

    Southern California, University of

    Generation of tsunamis by a slowly spreading uplift of the sea ¯oor Maria I. Todorovska*, Mihailo D spreading of the sea ¯oor uplift. A linearized solution for constant water depth is derived by transform methods (Laplace in time and Fourier in space), for sea ¯oor uplift represented by a sliding Heaviside

  10. Towards predictive simulation of wildfire spread at regional scale using ensemble-based data assimilation to correct the fire front

    E-Print Network [OSTI]

    - tation properties and wind conditions based on Rothermel's model; a series of observations of the fire;1. INTRODUCTION Computer-based wildfire spread modeling has emerged during the past two decades as a powerful toolTowards predictive simulation of wildfire spread at regional scale using ensemble-based data

  11. Early India-Australia spreading history revealed by newly detected Mesozoic magnetic anomalies in the Perth Abyssal Plain

    E-Print Network [OSTI]

    Granot, Roi

    Early India-Australia spreading history revealed by newly detected Mesozoic magnetic anomalies the early spreading history between India and Australia during the Mesozoic breakup of Gondwana. However from Australia with Greater India during initial breakup at ~130 Ma, then rifted from India following

  12. RIDGE 2000 Integrated Study Site Proposal for Hotspot-Influenced Oceanic Spreading Centers: Iceland and the Reykjanes and Kolbeinsey Ridges

    E-Print Network [OSTI]

    Menke, William

    RIDGE 2000 Integrated Study Site Proposal for Hotspot-Influenced Oceanic Spreading Centers: Iceland and the Reykjanes and Kolbeinsey Ridges Summary We propose that the Reykjanes Ridge, Iceland, and the Kolbeinsey efforts have focused on spreading rate as the primary variable, the Iceland-MAR system offers

  13. 0 10 20 30 40 50 60 70 80 90 100 Half spreading rate (mm per year)

    E-Print Network [OSTI]

    Müller, Dietmar

    60° 30° 0° 30° 60° 0 10 20 30 40 50 60 70 80 90 100 Half spreading rate (mm per year) Pacific Ocean you increase the speed of a continent ploughing through Earth's viscous, churning mantle? Kumar et al palaeomagnetic data and rates of seafloor spreading, and sets India apart from all its neighbours. Africa, Antarc

  14. Social Media: Weather-Ready Wednesday Please help the NWS spread these important safety messages on social media! Everyone is

    E-Print Network [OSTI]

    Social Media: Weather-Ready Wednesday #WRW Please help the NWS spread these important safety build a WeatherReady Nation. WeatherReady Wednesday is a National Weather Service initiative to help spread weather safety messages each week. Each week you can pick a different topic to share. It can

  15. Impacts of complex behavioral responses on asymmetric interacting spreading dynamics in multiplex networks

    E-Print Network [OSTI]

    Liu, Quan-Hui; Tang, Ming; Zhang, Hai-Feng

    2015-01-01

    Information diffusion and disease spreading in communication-contact layered network are typically asymmetrically coupled with each other, in which how an individual being aware of disease responds to the disease can significantly affect the disease spreading. Many recent studies have demonstrated that human behavioral adoption is a complex and non-Markovian process, where the probability of adopting one behavior is dependent on the cumulative times of the received information and the social reinforcement effect of these cumulative information. We study the impact of such a non-Markovian vaccination adoption behavior on the epidemic dynamics and the control effects. We find that this complex adoption behavior caused from the communication layer can significantly increase the epidemic threshold and reduce the final infection rate. By defining the social cost as the sum of the cost of vaccination and the cost of treatment, we show that there exists an optimal social reinforcement effect or optimal information t...

  16. On the spreading of Weddell Sea deep water in the southwestern Atlantic Ocean 

    E-Print Network [OSTI]

    Locarnini, Ricardo A

    1991-01-01

    that this WSDW, flowing northeastward through the Georgia Passage, might supply part of the coldest bottom water that enters the Argentine Basin through the Falkland Ridge Gap. 23 THE SCOTIA SEA AND THE WEDDELL SEA DEEP WATER OUTFLOW The occurrence...ON THE SPREADING OF WEDDELL SEA DEEP WATER IN THE SOUTHWESTERN ATLANTIC OCEAN A Thesis by RICARDO ALEJANDRO LOCARNINI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

  17. Obtaining statistics of cascading line outages spreading in an electric transmission network from standard utility data

    E-Print Network [OSTI]

    Dobson, Ian

    2015-01-01

    We show how to use standard transmission line outage historical data to obtain the network topology in such a way that cascades of line outages can be easily located on the network. Then we obtain statistics quantifying how cascading outages typically spread on the network. Processing real outage data is fundamental for understanding cascading and for evaluating the validity of the many different models and simulations that have been proposed for cascading in power networks.

  18. Constraining multiple systems with GAIA

    E-Print Network [OSTI]

    Beauvalet, L.

    GAIA will provide observations of some multiple asteroid and dwarf systems. These observations are a way to determine and improve the quantification of dynamical parameters, such as the masses and the gravity fields, in ...

  19. Multiple Motivations Institutional Change Principle

    Broader source: Energy.gov [DOE]

    The multiple motivations principle suggests that a portfolio approach—rather than a single strategy—may be required to achieve change. Research demonstrates that people and institutions adopt new...

  20. V-092: Pidgin Multiple Vulnerabilities

    Broader source: Energy.gov [DOE]

    Multiple vulnerabilities have been reported in Pidgin, which can be exploited by malicious people to manipulate certain data, cause a DoS (Denial of Service), and compromise a user's system.

  1. Evidence of thermonuclear flame spreading on neutron stars from burst rise oscillations

    E-Print Network [OSTI]

    Chakraborty, Manoneeta

    2014-01-01

    Burst oscillations during the rising phases of thermonuclear X-ray bursts are usually believed to originate from flame spreading on the neutron star surface. However, the decrease of fractional oscillation amplitude with rise time, which provides a main observational support for the flame spreading model, have so far been reported from only a few bursts. Moreover, the non-detection and intermittent detections of rise oscillations from many bursts are not yet understood considering the flame spreading scenario. Here, we report the decreasing trend of fractional oscillation amplitude from an extensive analysis of a large sample of Rossi X-ray Timing Explorer Proportional Counter Array bursts from ten neutron star low-mass X-ray binaries. This trend is 99.99% significant for the best case, which provides, to the best of our knowledge, by far the strongest evidence of such trend. Moreover, it is important to note that an opposite trend is not found from any of the bursts. The concave shape of the fractional ampli...

  2. Predicting the extinction of Ebola spreading in Liberia due to mitigation strategies

    E-Print Network [OSTI]

    Valdez, L D; Stanley, H E; Braunstein, L A

    2015-01-01

    The Ebola virus is spreading throughout West Africa, causing thousands of deaths. When developing strategies to slow or halt the epidemic, mathematical models that reproduce the spread of this virus are essential for understanding which variables are relevant. We study the propagation of the Ebola virus through Liberia by using a model in which people travel from one county to another in order to quantify the effectiveness of different strategies. For the initial months in which the Ebola virus spreads, we find that the arrival times of the disease into the counties predicted by our model are in good agreement with World Health Organization data. We also find that reducing mobility delays the arrival of Ebola virus in each county by only a few weeks, and as a consequence, is insufficient to contain the epidemic. Finally we study the effect of a strategy focused on increasing safe burials and hospitalization under two scenarios: (i) one implemented in mid-July 2014 and (ii) one in mid-August, which was the act...

  3. On compensating tune spread induced by space charge in bunched beams

    SciTech Connect (OSTI)

    Litvinenko, V. N.; Wang, G.

    2014-05-09

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

  4. Y-12 Final Site-Wide Environmental Impact Statement Approved...

    National Nuclear Security Administration (NNSA)

    Final Site-Wide Environmental Impact Statement Approved | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile...

  5. USFS West Wide Programmatic Environmental Impact Statement Record...

    Open Energy Info (EERE)

    Programmatic Environmental Impact Statement Record of Decision Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- OtherOther: USFS West Wide...

  6. Genome Wide Evaluation of Normal Human Tissue in Response to...

    Office of Scientific and Technical Information (OSTI)

    Wide Evaluation of Normal Human Tissue in Response to Controlled, In vivo Low-Dose Low LET Ionizing Radiation Exposure: Pathways and Mechanisms Final Report, September 2013 Rocke,...

  7. Benefits of Site-wide NEPA National Environmental Policy Act...

    Energy Savers [EERE]

    that process more useful to decision makers and thepublic, and to reduce the time and cost required to prepare NEPA documents. Benefits of Site-wide National Environmental...

  8. EIS-0281: Final Site-Wide Environmental Impact Statement | Department...

    Office of Environmental Management (EM)

    Final Site-Wide Environmental Impact Statement Sandia National LaboratoriesNew Mexico DOE proposes to continue operating the Sandia National LaboratoriesNew Mexico (SNL...

  9. EA-1956: Site-Wide Environmental Assessment for the Divestiture...

    Office of Environmental Management (EM)

    Assessment for the Divestiture of Rocky Mountain Oilfield Testing Center and Naval Petroleum Reserve No. 3, Natrona County, Wyoming EA-1956: Site-Wide Environmental Assessment...

  10. DOE Announces Webinars on Zero Energy Ready Homes, Wide Bandgap...

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

    on Opportunities for Wide Bandgap Semiconductor Power Electronics for Hydrogen and Fuel Cell Applications Webinar Sponsor: Fuel Cell Technologies Office The Energy...

  11. Using multiple perspectives to suppress information and complexity

    SciTech Connect (OSTI)

    Kelsey, R.L. |; Webster, R.B.; Hartley, R.T.

    1998-09-01

    Dissemination of battlespace information involves getting information to particular warfighters that is both useful and in a form that facilitates the tasks of those particular warfighters. There are two issues which motivate this problem of dissemination. The first issue deals with disseminating pertinent information to a particular warfighter. This can be thought of as information suppression. The second issue deals with facilitating the use of the information by tailoring the computer interface to the specific tasks of an individual warfighter. This can be thought of as interface complexity suppression. This paper presents a framework for suppressing information using an object-based knowledge representation methodology. This methodology has the ability to represent knowledge and information in multiple perspectives. Information can be suppressed by creating a perspective specific to an individual warfighter. In this way, only the information pertinent and useful to a warfighter is made available to that warfighter. Information is not removed, lost, or changed, but spread among multiple perspectives. Interface complexity is managed in a similar manner. Rather than have one generalized computer interface to access all information, the computer interface can be divided into interface elements. Interface elements can then be selected and arranged into a perspective-specific interface. This is done in a manner to facilitate completion of tasks contained in that perspective. A basic battlespace domain containing ground and air elements and associated warfighters is used to exercise the methodology.

  12. Performance of Multiple Pulse Multiple Delay Modulated UWB Signals in a Multiple Access Indoor Wireless Channel

    SciTech Connect (OSTI)

    Nekoogar, F

    2003-06-12

    In this paper, the performance of a two user UWB multiple access (UWB-MA) system based on multiple-pulse multiple-delay (MPMD) modulation scheme in an indoor wireless channel is evaluated by computer simulations. The indoor multipath propagation channel model used in this study is based on the modified statistical Saleh-Valenzuela model proposed by Foerester and Li from Intel. The simulation results indicate that the multipath performance of MPMD modulated signals in a multiple access system outperforms the nonmultipath case as the number of autocorrelation function (ACF) sampling points increases for each user. This is an unusual but important result, since MPMD receiver exploits multipath phenomenon in indoor wireless channels to increase the BER performance, hence the transmission rate in a UWB-MA system.

  13. Language Impairment in Multiple Sclerosis 

    E-Print Network [OSTI]

    Stahl, Hillary

    2011-11-23

    There is little research on language involvement in MS, though the studies that do exist indicate a wide variety of language impairments. No comprehensive study has yet been done investigating MS abilities in all the major ...

  14. CRITICAL INFRASTRUCTURE PROTECTION Multiple Efforts to Secure...

    Office of Environmental Management (EM)

    CRITICAL INFRASTRUCTURE PROTECTION Multiple Efforts to Secure Control Systems Are Under Way, but Challenges Remain CRITICAL INFRASTRUCTURE PROTECTION Multiple Efforts to Secure...

  15. Automatic Incremental Routing Using Multiple Roots

    E-Print Network [OSTI]

    Ghosh, Rumi; Garcia-Luna-Aceves, J.J.

    2013-01-01

    J. J. Garcia-Luna-Aceves, “Automatic Routing Using MultipleAutomatic Incremental Routing Using Multiple Roots RumiWe present Multi-root Automatic Incremental Rout- ing (

  16. Wide-field stellar photometry in Piwnice Observatory

    E-Print Network [OSTI]

    Gracjan Maciejewski

    2007-12-17

    In this paper research projects based on the wide-field CCD photometry performed in Piwnice Observatory are discussed. The used telescopes, as well as dedicated software pipeline for data reduction are presented. The prospects for collaboration between Polish and Bulgarian institutes in the field of wide-field photometry are also discussed.

  17. Seattle Smart Traveler: Dynamic Ridematching on the World Wide Web

    E-Print Network [OSTI]

    Seattle Smart Traveler: Dynamic Ridematching on the World Wide Web D. J. Dailey* , D. Loseff, and D Smart Traveler (SST) is an application of World Wide Web (WWW) technology to test the concept. Keywords: Dynamic ridematch; Rideshare; Database; WWW; Carpool 1. INTRODUCTION Seattle Smart Traveler (SST

  18. Advances in wide bandgap materials for semiconductor spintronics

    E-Print Network [OSTI]

    Hebard, Arthur F.

    Advances in wide bandgap materials for semiconductor spintronics S.J. Pearton1,* , C.R. Abernathy1 or light emission. The relatively new field of semiconductor spintronics seeks, in addition, to exploit Elsevier Science B.V. All rights reserved. Keywords: Wide bandgap materials; Semiconductor; Spintronics 1

  19. World Wide WebWWWDeep Web Web Deep Web

    E-Print Network [OSTI]

    Deep Web Web World Wide WebWWWDeep Web Web Deep Web Deep Web Deep Web Deep Web Deep Web 1 World Wide Web [1] Web 200,000TB Web Web Web Internet Web Web Web "" Surface Web Deep Web Surface Web 21.3% Surface Web Deep Web [2] Deep Web Web Crawler Deep Web 1 Web

  20. WITS Image Differencing & Extrac4on pipeline (WIDE)

    E-Print Network [OSTI]

    Masci, Frank

    WITS Image Differencing & Extrac4on pipeline (WIDE) F. Masci, 11 Factory's Image Differencing and Extrac4on pipeline (designed for PTF-I and PTF-2...). 2 #12;The "WIDE" pipeline [from Masci, 2012] 3 #12;Recommenda4ons for WITS

  1. Russia's Wild Wild South: Two Tales of Economic Woes, Political Corruption and Spreading Insurgent Violence in Ingushetia and Dagestan

    E-Print Network [OSTI]

    Grandstaff, John M.

    2011-05-14

    The Northern Caucasus has been a troubled region for the Russian Federation for nearly two decades. In the 1990s, two wars took place in Chechnya and violence spread into the neighboring republics of Ingushetia and Dagestan. ...

  2. Development of a system for quantifying the rate of spread of oak wilt using remote sensing and geographic information systems 

    E-Print Network [OSTI]

    Ware, Charles William

    1990-01-01

    DEVELOPMENT OF A SYSTEM FOR QUANTIFYING THE RATE OF SPREAD OF OAR WILT USING REMOTE SENSING AND GEOGRAPHIC INFORMATION SYSTEMS A Thesis by CHARLES WILLIAM WARE Submitted to the Office of Graduate Studies of Texas ASM University in partial... of Spread of Oak Wilt Using Remote Sensing and Geographic Information Systems. (December 1990) Charles William Ware, B. S. , Stephen F. Austin St. Univ. Chair of Advisory Committee: Dr. Robert Maggio Oak wilt, caused by the fungus Ce atoc st's fa...

  3. Multiple resonant railgun power supply

    DOE Patents [OSTI]

    Honig, Emanuel M. (Los Alamos, NM); Nunnally, William C. (Los Alamos, NM)

    1988-01-01

    A multiple repetitive resonant railgun power supply provides energy for repetitively propelling projectiles from a pair of parallel rails. A plurality of serially connected paired parallel rails are powered by similar power supplies. Each supply comprises an energy storage capacitor, a storage inductor to form a resonant circuit with the energy storage capacitor and a magnetic switch to transfer energy between the resonant circuit and the pair of parallel rails for the propelling of projectiles. The multiple serial operation permits relatively small energy components to deliver overall relatively large amounts of energy to the projectiles being propelled.

  4. Load tests on five large spread footings on sand and evaluation of prediction methods 

    E-Print Network [OSTI]

    Gibbens, Robert Melvin

    1995-01-01

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cross-Hole Wave Tests. Dilatometer Tests . . Borehole Shear Tests. . Step Blade Tests. 5 9 17 22 28 34 34 39 45 54 56 64 64 LOAD TEST SETUP 3. 1 3. 2 3. 3 3. 4 3. 5 3. 6 General Setup. Spread Footing Construction Reaction Shaft... INVOLVED Mr. Mike Adams Dr. Allan Lutenegger Dr. Don Degroot Buchanan/Soil Mechanics Dr. Derek Morris Mr. Tony Yen Mr. John Del hia PiezoCone Penetration Test Dilatometer Tests Dilatometer Test w/Thrust Measurements Pressuremeter Tests Step...

  5. Spread and transmission of bacterial pathogens in experimental nematode populations of Caenorhabditis elegans.

    E-Print Network [OSTI]

    Diaz, S. Anaid; Restif, Olivier

    2014-06-22

    . After incubation the sample was 195 centrifuged (1500 rpm for 1 min) and washed twice with M9 to remove 196 antibiotics. The pelleted sample from each tube with the progeny was then 197 transferred to an agar plate containing antibiotics as before. We... Journal of Soil Biology. 540 42:S70–S78 541 542 13. Grewal PS. 1991. Effects of Caenorhabditis elegans on the spread of 543 the bacterium Pseudomonas tolaasii in mushrooms. Ann. appl. Biol. 118: 47-544 55. 545 546 14. Gibbs DS, Anderson GL...

  6. Spreading an Idea From the William Kamkwamba TED Talk | GE Global Research

    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 AdministrationRobust,Field-effect Photovoltaics -7541C.3 SpecialSponsor Guidelines Candidates fSpreading an

  7. How Do You Spread the Word About Saving Energy? | 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:FinancingPetroleum12,ExecutiveFinancingR Walls - Buildingof EnergyTown,FinanceWithatMoneySpread

  8. The spatial ecology of Blanding's turtles (Emydoidea blandingii): from local movement patterns, home ranges and microhabitat selection to Ontario-wide

    E-Print Network [OSTI]

    Blouin-Demers, Gabriel

    , home ranges and microhabitat selection to Ontario-wide habitat suitability modelling. Catherine% of the global range of the Blandings turtle is contained in Ontario (COSEWIC, 2005). The purpose of this study was to characterise the spatial ecology of Blandings turtles in Ontario at multiple spatial scales, from a single

  9. Damage spreading in spatial and small-world random boolean networks

    SciTech Connect (OSTI)

    Lu, Qiming [Los Alamos National Laboratory; Teuscher, Christof [Los Alamos National Laboratory

    2008-01-01

    Random Boolean Networks (RBNs) are often used as generic models for certain dynamics of complex systems, ranging from social networks, neural networks, to gene or protein interaction networks. Traditionally, RBNs are interconnected randomly and without considering any spatial arrangement of the links and nodes. However, most real-world networks are spatially extended and arranged with regular, small-world, or other non-random connections. Here we explore the RBN network topology between extreme local connections, random small-world, and random networks, and study the damage spreading with small perturbations. We find that spatially local connections change the scaling of the relevant component at very low connectivities ({bar K} << 1) and that the critical connectivity of stability K{sub s} changes compared to random networks. At higher {bar K}, this scaling remains unchanged. We also show that the relevant component of spatially local networks scales with a power-law as the system size N increases, but with a different exponent for local and small-world networks. The scaling behaviors are obtained by finite-size scaling. We further investigate the wiring cost of the networks. From an engineering perspective, our new findings provide the key trade-offs between damage spreading (robustness), the network wiring cost, and the network's communication characteristics.

  10. A chemical trompe-l'\\oe{}il: no iron spread in the globular cluster M22

    E-Print Network [OSTI]

    Mucciarelli, A; Massari, D; Pancino, E; Stetson, P B; Ferraro, F R; Lanzoni, B; Lardo, C

    2015-01-01

    We present the analysis of high-resolution spectra obtained with UVES and UVES-FLAMES at the Very Large Telescope of 17 giants in the globular cluster M22, a stellar system suspected to have an intrinsic spread in the iron abundance. We find that when surface gravities are derived spectroscopically (by imposing to obtain the same iron abundance from FeI and FeII lines) the [Fe/H] distribution spans ~0.5 dex, according to previous analyses. However, the gravities obtained in this way correspond to unrealistic low stellar masses (0.1-0.5 Msun) for most of the surveyed giants. Instead, when photometric gravities are adopted, the [FeII/H] distribution shows no evidence of spread at variance with the [FeI/H] distribution. This difference has been recently observed in other clusters and could be due to non-local thermodynamical equilibrium effects driven by over-ionization mechanisms, that mainly affect the neutral species (thus providing lower [FeI/H]) but leave [FeII/H] unaltered. We confirm that the s-process el...

  11. X-ray Burst Oscillations: From Flame Spreading to the Cooling Wake

    E-Print Network [OSTI]

    Simin Mahmoodifar; Tod Strohmayer

    2015-10-16

    Type I X-ray bursts are thermonuclear flashes observed from the surface of accreting neutron stars in Low Mass X-ray Binaries. Oscillations have been observed during the rise and/or decay of some of these X-ray bursts. Those seen during the rise can be well explained by a spreading hot spot model, but to date there haven't been any quantitative studies that consistently track the oscillation amplitude both during the rise and decay (tail) of bursts. Here we compute the light curves and amplitudes of oscillations in X-ray burst models that realistically account for both flame spreading and subsequent cooling. We present results for two such "cooling wake" models, a "canonical" cooling model where each patch on the neutron star surface heats and cools identically, and an "asymmetric" model where parts of the star cool at different rates. We show that while canonical cooling models can generate oscillations in the tails of bursts, they cannot easily produce the highest observed modulation amplitudes. Alternatively, a simple model with asymmetric cooling can achieve higher amplitudes consistent with the observations.

  12. Marangoni spreading due to a localized alcohol supply on a thin water film

    E-Print Network [OSTI]

    Hernández-Sánchez, José Federico; Snoeijer, J H

    2013-01-01

    Bringing the interfaces of two miscible fluids into contact naturally generates strong gradients in surface tension. Here we investigate such a Marangoni-driven flow by continuously supplying isopropyl alcohol (IPA) on a film of water, using micron-sized droplets of IPA-water mixtures. These droplets create a localized depression in surface tension that leads to the opening of a circular and thin region in the water film. At the edge of the thin region, there is a rim growing and collecting the water of the film. We find that the spreading radius scales as $r \\sim t^{1/2}$. This result can be explained from a balance between Marangoni and viscous stresses, assuming that the gradients in surface tension are smoothened out over the entire size of the circular opening. We derive a scaling law that accurately predicts the influence of the IPA flux as well as the thickness of the thin film at the interior of the spreading front.

  13. Spreading layers in accreting objects: role of acoustic waves for angular momentum transport, mixing and thermodynamics

    E-Print Network [OSTI]

    Philippov, Alexander A; Stone, James M

    2015-01-01

    Disk accretion at high rate onto a white dwarf or a neutron star has been suggested to result in the formation of a spreading layer (SL) - a belt-like structure on the object's surface, in which the accreted matter steadily spreads in the poleward (meridional) direction while spinning down. To assess its basic characteristics we perform two-dimensional hydrodynamic simulations of supersonic SLs in the relevant morphology with a simple prescription for cooling. We demonstrate that supersonic shear naturally present at the base of the SL inevitably drives sonic instability that gives rise to large scale acoustic modes governing the evolution of the SL. These modes dominate the transport of momentum and energy, which is intrinsically global and cannot be characterized via some form of local effective viscosity (e.g. $\\alpha$-viscosity). The global nature of the wave-driven transport should have important implications for triggering Type I X-ray bursts in low mass X-ray binaries. The nonlinear evolution of waves ...

  14. Interplay between the local information based behavioral responses and the epidemic spreading in complex networks

    E-Print Network [OSTI]

    Liu, Can; Chen, Han-Shuang; Zhang, Hai-Feng; Tang, Ming

    2015-01-01

    The spreading of an infectious disease can trigger human behavior responses to the disease, which in turn plays a crucial role on the spreading of epidemic. In this study, to illustrate the impacts of the human behavioral responses, a new class of individuals, $S^F$, is introduced to the classical susceptible-infected-recovered ($SIR$) model. In the model, $S^F$ state represents that susceptible individuals who take self-initiate protective measures to lower the probability of being infected, and a susceptible individual may go to $S^F$ state with a response rate when contacting an infectious neighbor. Via the percolation method, the theoretical formulas for the epidemic threshold as well as the prevalence of epidemic are derived. Our finding indicates that, with the increasing of the response rate, the epidemic threshold is enhanced and the prevalence of epidemic is reduced. The analytical results are also verified by the numerical simulations. In addition, we demonstrate that, because the mean field method ...

  15. Thermonuclear Flame Spreading on Rapidly Spinning Neutron Stars: Indications of the Coriolis Force?

    E-Print Network [OSTI]

    Sudip Bhattacharyya; Tod E. Strohmayer

    2007-08-27

    Millisecond period brightness oscillations during the intensity rise of thermonuclear X-ray bursts are likely caused by an azimuthally asymmetric, expanding burning region on the stellar surface. The time evolution of the oscillation amplitude during the intensity rise encodes information on how the thermonuclear flames spread across the stellar surface. This process depends on properties of the accreted burning layer, surface fluid motions, and the surface magnetic field structure, and thus can provide insight into these stellar properties. We present two examples of bursts from different sources that show a decrease in oscillation amplitude during the intensity rise. Using theoretical modeling, we demonstrate that the observed amplitude evolution of these bursts is not well described by a uniformly expanding circular burning region. We further show that by including in our model the salient aspects of the Coriolis force (as described by Spitkovsky, Levin, and Ushomirsky) we can qualitatively reproduce the observed evolution curves. Our modeling shows that the evolutionary structure of burst oscillation amplitude is sensitive to the nature of flame spreading, while the actual amplitude values can be very useful to constrain some source parameters.

  16. Automatic record extraction for the World Wide Web

    E-Print Network [OSTI]

    Shen, Yuan Kui

    2006-01-01

    As the amount of information on the World Wide Web grows, there is an increasing demand for software that can automatically process and extract information from web pages. Despite the fact that the underlying data on most ...

  17. DOE/OIT Plant-Wide Energy Assessment Experience Summary 

    E-Print Network [OSTI]

    Olszewski, M.; Leach, R.; McElhaney, K.

    2001-01-01

    The Department of Energy (DOE) Office of Industrial Technologies (OIT) is sponsoring cost-shared, plant-wide energy assessments of industrial facilities through its BestPractices Program. The purpose of these assessments is to examine plant utility...

  18. Chemistry & Biology Genome-Wide High-Throughput Mining

    E-Print Network [OSTI]

    Yin, Jun

    Chemistry & Biology Article Genome-Wide High-Throughput Mining of Natural-Product Biosynthetic Gene.01.006 SUMMARY We have developed a phage-display method for high-throughput mining of bacterial gene clus- ters

  19. March 1, 2013. Campus Wide District Heating & Cooling System

    E-Print Network [OSTI]

    ____________________________ March 1, 2013. Campus Wide District Heating & Cooling System. Today · Decentralisation of the heating plant · Introduction of an Energy Loop · Geothermal 4. Results 5 · Decentralisation of the heating plant · Introduction of an Energy Loop · Geothermal 4. Results 5. Tomorrow 6

  20. Wide band-gap nanowires for light emitting diodes

    E-Print Network [OSTI]

    Chesin, Jordan (Jordan Paul)

    2015-01-01

    Wide band-gap nanowires composed of GaN and ZnO are promising materials for unique designs and potential efficiency improvement of light emitting diodes (LEDs) for solid state lighting. The large surface-to-volume ratio ...

  1. Department-wide Quick Reaction Work Order System

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

    1981-03-12

    To describe the new Department Wide Quick Reaction Work Order System, to establish the criteria and procedures for its use, and to identify responsibilities for managing and operating the system.

  2. DCC Case Study: Wide Field Astronomy Unit (WFAU) 

    E-Print Network [OSTI]

    Donnelly, Martin

    2005-12-01

    Case study on the Wide Field Astronomy Unit (WFAU), Edinburgh. Outlines data curation issues with which WFAU is involved, with an emphasis on interoperability. Particular regard is given to the transfer and reuse of ...

  3. A Study of Transport Protocols for Wide Area Scientific Applications

    SciTech Connect (OSTI)

    Vishal Misra

    2011-03-01

    This is the final project report of award "A Study of Transport Protocols for Wide Area Scientific Applications", given by DOE in 2003 to Vishal Misra at Columbia University.

  4. Sensory transformations and the use of multiple reference frames for reach planning

    E-Print Network [OSTI]

    Sabes, Philip

    Sensory transformations and the use of multiple reference frames for reach planning Leah M M McGuire & Philip N Sabes The sensory signals that drive movement planning arrive in a variety of `reference frames the sensory signals available for reach planning were varied. These results challenge the widely held ideas

  5. Multiple Loci within the Major Histocompatibility Complex Confer Risk of Psoriasis

    E-Print Network [OSTI]

    Abecasis, Goncalo

    Multiple Loci within the Major Histocompatibility Complex Confer Risk of Psoriasis Bing-Jian Feng1 Psoriasis is a common inflammatory skin disease characterized by thickened scaly red plaques. Previously we have performed a genome-wide association study (GWAS) on psoriasis with 1,359 cases and 1,400 controls

  6. Centroid-based summarization of multiple documents: sentence extraction, utility-based evaluation, and user studies

    E-Print Network [OSTI]

    applied to the evaluation of both single and multiple document summaries. Finally, we describe two user generation. Finally, evaluation of multi-document summaries is a difficult problem. There is not yet a widely, called MEAD, which generates summaries using cluster centroids produced by a topic detection and tracking

  7. Measuring acoustic-prosodic entrainment with respect to multiple levels and dimensions.

    E-Print Network [OSTI]

    Hirschberg, Julia

    Measuring acoustic-prosodic entrainment with respect to multiple levels and dimensions. Rivka- ious dimensions. This phenomenon, commonly called entrain- ment, coordination, or alignment, is widely believed to be cru- cial to the success and naturalness of human interactions. We investigate entrainment

  8. Snap: Robust Tool for Internet-wide Operating System Fingerprinting 

    E-Print Network [OSTI]

    Nandwani, Ankur Bharatbhushan

    2012-02-14

    FOR INTERNET-WIDE OPERATING SYSTEM FINGERPRINTING A Thesis by ANKUR BHARATBHUSHAN NANDWANI Submitted to the O?ce of Graduate Studies of Texas A&M University in partial fulflllment of the requirements for the degree of MASTER OF SCIENCE December 2010... Major Subject: Computer Science SNAP: ROBUST TOOL FOR INTERNET-WIDE OPERATING SYSTEM FINGERPRINTING A Thesis by ANKUR BHARATBHUSHAN NANDWANI Submitted to the O?ce of Graduate Studies of Texas A&M University in partial fulflllment...

  9. Multiple Exciton Generation Solar Cells

    SciTech Connect (OSTI)

    Luther, J. M.; Semonin, O. E.; Beard, M. C.; Gao, J.; Nozik, A. J.

    2012-01-01

    Heat loss is the major factor limiting traditional single junction solar cells to a theoretical efficiency of 32%. Multiple Exciton Generation (MEG) enables efficient use of the solar spectrum yielding a theoretical power conversion efficiency of 44% in solar cells under 1-sun conditions. Quantum-confined semiconductors have demonstrated the ability to generate multiple carriers but present-day materials deliver efficiencies far below the SQ limit of 32%. Semiconductor quantum dots of PbSe and PbS provide an active testbed for developing high-efficiency, inexpensive solar cells benefitting from quantum confinement effects. Here, we will present recent work of solar cells employing MEG to yield external quantum efficiencies exceeding 100%.

  10. Multiple target laser ablation system

    DOE Patents [OSTI]

    Mashburn, Douglas N. (Knoxville, TN)

    1996-01-01

    A laser ablation apparatus and method are provided in which multiple targets consisting of material to be ablated are mounted on a movable support. The material transfer rate is determined for each target material, and these rates are stored in a controller. A position detector determines which target material is in a position to be ablated, and then the controller controls the beam trigger timing and energy level to achieve a desired proportion of each constituent material in the resulting film.

  11. Multiple target laser ablation system

    DOE Patents [OSTI]

    Mashburn, D.N.

    1996-01-09

    A laser ablation apparatus and method are provided in which multiple targets consisting of material to be ablated are mounted on a movable support. The material transfer rate is determined for each target material, and these rates are stored in a controller. A position detector determines which target material is in a position to be ablated, and then the controller controls the beam trigger timing and energy level to achieve a desired proportion of each constituent material in the resulting film. 3 figs.

  12. The Impact of Wide-Scale Implementation of Net Zero-Energy Homes on the Western Grid

    SciTech Connect (OSTI)

    Dirks, James A.

    2010-08-16

    Pacific Northwest National Laboratory conducted a study on the impact of wide-scale implementation of net zero-energy homes (ZEHs) in the western grid. Although minimized via utilization of advanced building technologies, ZEHs still consume energy that must be balanced on an annual basis via self-generation of electricity which is commonly assumed to be from rooftop photovoltaics (PV). This results in a ZEH having a significantly different electricity demand profile than a conventional home. Wide-spread implementation of ZEHs will cause absolute demand levels to fall compared to continued use of more conventional facilities; however, the shape of the demand profile will also change significantly. Demand profile changes will lead to changes in the hourly value of electric generation. With significant penetration of ZEHs, it can be expected that ZEHs will face time of day rates or real time pricing that reflect the value of generation and use. This will impact the economics of ZEHs and the optimal design of PV systems for subsequent ZEHs.

  13. Global warming and the potential spread of vector-borne diseases

    SciTech Connect (OSTI)

    Patz, J.

    1996-12-31

    Climatic factors influence many vector-borne infectious diseases, in addition to demographic, biological, and ecological determinants. The United Nation`s Intergovernmental Panel on Climate Change (IPCC) estimates an unprecedented global rise of 2.0 C by the year 2100. Of major concern is that these changes can affect the spread of many serious infectious diseases, including malaria and dengue fever. Global warming would directly affect disease transmission by shifting the mosquito`s geographic range, increasing reproductive and biting rates, and shortening pathogen incubation period. Human migration and damage to health infrastructures from the projected increase in climate variability and sea level rise could indirectly contribute to disease transmission. A review of this literature, as well as preliminary data from ongoing studies will be presented.

  14. Efficient reconstruction of transmission probabilities in a spreading process from partial observations

    E-Print Network [OSTI]

    Lokhov, Andrey Y

    2015-01-01

    An important problem of reconstruction of diffusion network and transmission probabilities from the data has attracted a considerable attention in the past several years. A number of recent papers introduced efficient algorithms for the estimation of spreading parameters, based on the maximization of the likelihood of observed cascades, assuming that the full information for all the nodes in the network is available. In this work, we focus on a more realistic and restricted scenario, in which only a partial information on the cascades is available: either the set of activation times for a limited number of nodes, or the states of nodes for a subset of observation times. To tackle this problem, we first introduce a framework based on the maximization of the likelihood of the incomplete diffusion trace. However, we argue that the computation of this incomplete likelihood is a computationally hard problem, and show that a fast and robust reconstruction of transmission probabilities in sparse networks can be achi...

  15. Practical biological spread-out Bragg peak design of carbon beam

    E-Print Network [OSTI]

    Kim, Chang Hyeuk; Chang, Seduk; Jang, Hong Suk; Kim, Jeong Hwan; Park, Dong Wook; Hwang, Won Taek; Yang, Tea-Keun

    2015-01-01

    The carbon beams show more advantages on the biological properties compared with proton beams in radiation therapy. The carbon beam shows high linear energy transfer (LET) to medium and it increases the relative biological effectiveness (RBE). To design spread-out Bragg peak (SOBP) of biological dose using carbon beam, a practical method was purposed by using the linear-quadratic (LQ) model and Geant4 based Monte Carlo simulation code. The various Bragg peak profiles and LET was calculated for each slice at the target region. To generate appropriate biological SOBP, a set of weighting factor, which is a power function in terms of energy step, was applied to the obtained each physical dose. The designed biological SOBP showed 1.34 % of uniformity.

  16. Multiple hypothesis testing -recent developments and future

    E-Print Network [OSTI]

    Steinsland, Ingelin

    NTNU Multiple hypothesis testing - recent developments and future challenges Ingelin Steinsland developments and future challenges ­ p.1/28 #12;NTNU Outline Single hypothesis testing Multiple hypothesis testing Quantities and issues False discovery rates Future challenges Within false discovery rates

  17. Indoor Position Estimation System for Wide Area Augmented Reality Applications

    E-Print Network [OSTI]

    Zakhor, Avideh

    reality applications is to localize the user accurately so as to superimpose metadata in the user's field, scalable way; (b) construct multiple sensor e.g. WiFi and imagery signature databases for the same or carrying a mo- bile device equipped with a camera and WiFi sensor. The system consists of a man portable

  18. Multiple soil nutrient competition between plants, microbes,...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Multiple soil nutrient competition between plants, microbes, and mineral surfaces: model development, parameterization, and example applications in several...

  19. 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

  20. ORIGINAL CONTRIBUTION Modification of Multiple Sclerosis Phenotypes

    E-Print Network [OSTI]

    Reich, David

    ORIGINAL CONTRIBUTION Modification of Multiple Sclerosis Phenotypes by African Ancestry at HLA. Oksenberg, PhD Background: In those with multiple sclerosis (MS), Afri- can American individuals have a more ancestry at HLA correlated with dis- ability as measured by the Multiple Sclerosis Severity Score (P .001

  1. http://msj.sagepub.com Multiple Sclerosis

    E-Print Network [OSTI]

    Hamarneh, Ghassan

    http://msj.sagepub.com Multiple Sclerosis DOI: 10.1177/135248506071178 2006; 12; 1Mult Scler Oral://www.sagepublications.com can be found at:Multiple SclerosisAdditional services and information for http in multiple sclerosis (MS) patients at a faster rate ((/4.5% versus (/1%) than loss in whole brain volume

  2. Multiple Sclerosis Luminance Threshold and Measurements

    E-Print Network [OSTI]

    Foster, David H.

    Multiple Sclerosis Luminance Threshold and Measurements of Temporal Characteristics of Vision indicates multiple sclerosis; ON, optic neuritis. Table 1.-Clinical Details of Patients Details of Eye In patient with multiple sclerosis (MS) and In normal control subjects. The Inten Itles of the tlmull used

  3. Short Papers___________________________________________________________________________________________________ Mining Multiple-Level Association

    E-Print Network [OSTI]

    Wu, Xindong

    ___________________________________________________________________________________________________ Mining Multiple-Level Association Rules in Large Databases Jiawei Han, Member, IEEE Computer Society for efficient mining of multiple-level association rules from large transaction databases based on the Apriori. Index TermsÐData mining, knowledge discovery in databases, association rules, multiple-level association

  4. PARALLEL MATRIX MULTIPLICATION: A SYSTEMATIC JOURNEY

    E-Print Network [OSTI]

    Batory, Don

    PARALLEL MATRIX MULTIPLICATION: A SYSTEMATIC JOURNEY MARTIN D. SCHATZ, ROBERT A. VAN DE GEIJN- trix matrix multiplication algorithms. The journey starts with a description of how matrices implementation of matrix-vector multiplication and rank-1 update, continues on to reveal a fam- ily of matrix-matrix

  5. Multiple piece turbine rotor blade

    DOE Patents [OSTI]

    Jones, Russell B; Fedock, John A

    2013-05-21

    A multiple piece turbine rotor blade with a shell having an airfoil shape and secured between a spar and a platform with the spar including a tip end piece. a snap ring fits around the spar and abuts against the spar tip end piece on a top side and abuts against a shell on the bottom side so that the centrifugal loads from the shell is passed through the snap ring and into the spar and not through a tip cap dovetail slot and projection structure.

  6. Recirculation in multiple wave conversions

    SciTech Connect (OSTI)

    Brizard, A. J. [Department of Chemistry and Physics, Saint Michael's College, Colchester, Vermont 05439 (United States); Kaufman, A. N. [Department of Physics and Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States); Tracy, E. R. [Department of Physics, College of William and Mary, Williamsburg, Virginia 23187-8795 (United States)

    2008-08-15

    A one-dimensional multiple wave-conversion model is constructed that allows energy recirculation in ray phase space. Using a modular eikonal approach, the connection coefficients for this model are calculated by ray phase-space methods. Analytical results (confirmed numerically) show that all connection coefficients exhibit interference effects that depend on an interference phase, calculated from the coupling constants and the area enclosed by the intersecting rays. This conceptual model, which focuses on the topology of intersecting rays in phase space, is used to investigate how mode conversion between primary and secondary waves is modified by the presence of a tertiary wave.

  7. Wide-band negative permeability of nonlinear metamaterials

    E-Print Network [OSTI]

    Wide-band negative permeability of nonlinear metamaterials Mikhail Lapine1 , Ilya Shadrivov2 & Yuri frequency range where metamaterial possesses negative effective permeability. This can be achieved by employing a nonlinear response of metamaterials. We demonstrate that, with an appropriate design

  8. Single Sub-20 nm Wide, Centimeter-Long Nanofluidic Channel

    E-Print Network [OSTI]

    Single Sub-20 nm Wide, Centimeter-Long Nanofluidic Channel Fabricated by Novel Nanoimprint Mold an imprint mold of a channel pattern and nanoimprint to duplicate such channel. The centimeter-long channel without additional size shrinking.17 Single channels have been fabricated by using edge patterning18 (note

  9. Wide band focusing x-ray spectrograph with spatial resolution

    SciTech Connect (OSTI)

    Pikuz, S. A.; Douglass, J. D.; Shelkovenko, T. A.; Sinars, D. B.; Hammer, D. A.

    2008-01-15

    A new, wide spectral bandwidth x-ray spectrograph, the wide-bandwidth focusing spectrograph with spatial resolution (WB-FSSR), based on spherically bent mica crystals, is described. The wide bandwidth is achieved by combining three crystals to form a large aperture dispersive element. Since the WB-FSSR covers a wide spectral band, it is very convenient for application as a routine diagnostic tool in experiments in which the desired spectral coverage is different from one test to the next. The WB-FSSR has been tested in imploding wire-array experiments on a 1 MA pulsed power machine, and x-ray spectra were recorded in the 1-20 A spectral band using different orders of mica crystal reflection. Using a two mirror-symmetrically placed WB-FSSR configuration, it was also possible to distinguish between a real spectral shift and a shift of recorded spectral lines caused by the spatial distribution of the radiating plasma. A spectral resolution of about 2000 was demonstrated and a spatial resolution of {approx}100 {mu}m was achieved in the spectral band of 5-10 A in second order of mica reflection. A simple method of numerical analysis of spectrograph capability is proposed.

  10. Compute and Storage Clouds Using Wide Area High Performance Networks

    E-Print Network [OSTI]

    Grossman, Robert

    Compute and Storage Clouds Using Wide Area High Performance Networks Robert L. Grossman Yunhong Gu. The infrastructure consists of a storage cloud called Sector and a compute cloud called Sphere. We describe two (record- based, column-based or object-based services); and a compute cloud provides computational

  11. A Parsimony Approach to Genome-Wide Ortholog Assignment

    E-Print Network [OSTI]

    Chen, Xin

    A Parsimony Approach to Genome-Wide Ortholog Assignment Zheng Fu1 , Xin Chen2 , Vladimir Vacic1 of orthologous genes between a pair of genomes is a fundamental and challenging problem in comparative ge- nomics combinatorial approach that combines sequence similarity and genome rearrangement. This paper continues

  12. Effective Network Management via System-Wide Coordination and Optimization

    E-Print Network [OSTI]

    and deployment costs for operators. Despite this increased complexity and cost, the incremental nature within device-centric config- urations. This dissertation argues for a clean-slate system-wide approach as a great sounding board for different ideas. I hope that some of his energy and enthusiasm have rubbed off

  13. Integrated Energy/Transportation Continent-wide Infrastructure Design

    E-Print Network [OSTI]

    McCalley, James D.

    to fracking impact: water/earthquake 2. GHG-induced climate change occurs rapidly re- quiring gas useIntegrated Energy/Transportation Continent-wide Infrastructure Design 1 James McCalley Harpole Wolf 13 11/20 14 12/4 RyanKonopinski (GE) 15 12/11 Huiyi Zhang, Nick Brown,DavidJahn #12;1. US energy

  14. Photocell utilizing a wide-bandgap semiconductor material

    DOE Patents [OSTI]

    Carlson, David E. (Yardley, PA); Williams, Brown F. (Princeton, NJ)

    1984-06-05

    A photocell comprises a p-i-n amorphous silicon structure having a wide bandgap layer adjacent to either the p-type or n-type layer. This structure reduces the absorption of light entering the photocell and the back-diffusion of minority carriers.

  15. ADVANCES IN MATHEMATICAL PROGRAMMING MODELS FOR ENTERPRISE-WIDE OPTIMIZATION

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    The chemical industry is a major component of the US economy, converting raw materials such as oil, natural gas, the US chemical industry is responsible for 10 percent of US merchandise exports, totaling US$145 billion Pittsburgh, PA 15213 Abstract Enterprise-wide optimization (EWO) is an area that lies at the interface

  16. Publications Forest Research publishes a wide range of

    E-Print Network [OSTI]

    Publications Forest Research publishes a wide range of material, from corporate reports and plans publications catalogue at www.forestry.gov.uk/publications In addition, our researchers publish peer Annual Report and Accounts 2007­2008 #12;Publications Forestry Commission technical publications

  17. Overview Orc Notation Examples Structured Wide-Area Programming

    E-Print Network [OSTI]

    Misra, Jayadev

    Overview Orc Notation Examples Structured Wide-Area Programming William Cook, Jayadev Misra, David Kitchin, Adrian Quark Department of Computer Science University of Texas at Austin http://orc.csres.utexas.edu #12;Overview Orc Notation Examples Outline Overview Orc Notation Examples #12;Overview Orc Notation

  18. Cell Reports Genome-wide Analysis Reveals Extensive Functional

    E-Print Network [OSTI]

    Schnaufer, Achim

    of the replication initiator ORC1/CDC6 and have identified replication origins, revealing that both localize a profound functional overlap, as reducing ORC1/CDC6 levels leads to genome-wide increases in mRNA levels arising from the boundaries of the transcription units. In addition, ORC1/CDC6 loss causes derepression

  19. Direct observation of a widely tunable bandgap in bilayer graphene

    E-Print Network [OSTI]

    Zettl, Alex

    . Most notably, the inversion symmetric AB-stacked bilayer graphene is a zero-bandgap semiconductor in the graphene FET device we are able to control independently the two key semiconductor parameters: electronicLETTERS Direct observation of a widely tunable bandgap in bilayer graphene Yuanbo Zhang1 *, Tsung

  20. What is SYP? A Web site that displays a wide

    E-Print Network [OSTI]

    What is SYP? A Web site that displays a wide range of exciting opportunities for pre-K through 12th, science, sports, and writing, MSU is sure to have a program for every student! You can search the SYP Web and topics from any page on the site The Spartan Youth Programs Web site is maintained by University Outreach

  1. Oil vs. Natural Gas: Prices and US Economy Wide Factors

    E-Print Network [OSTI]

    California at Davis, University of

    Oil vs. Natural Gas: Prices and US Economy Wide Factors UC Davis October 1, 2015 Stephen Brown.S. reliance on imported natural gas · Substantially lower natural gas prices · How has natural gas consumption responded? · Will natural gas prices remain low relative to oil? · Brown and Yücel (2008); Huntington (2007

  2. Internet and World Wide Web (WWW) EXEN 550, Management Information

    E-Print Network [OSTI]

    Kimbrough, Steven Orla

    Internet and World Wide Web (WWW) Lab: EXEN 550, Management Information Systems University's mode of addressing 2. Lynx---exploring the Web with a simple text­based browser \\Lambda File: internet on the Web---tools for finding things 5. Building your own Web page Throughout, we will emphasize basic

  3. Development of a World Wide Web based quiz management system 

    E-Print Network [OSTI]

    Taylor, Shannon Carol

    1997-01-01

    over the World Wide Web (WWW) using a WWW browser that is frame-capable. This system would allow instructors to assign quizzes to be taken outside of lecture time on the Internet, which would allow them more lecture time. This system also allows users...

  4. Stochastic dynamics of Arctic sea ice Part II: Multiplicative noise

    E-Print Network [OSTI]

    Moon, Woosok

    2015-01-01

    We analyze the numerical solutions of a stochastic Arctic sea ice model with multiplicative noise over a wide range of external heat-fluxes, $\\Delta F_0$, which correspond to greenhouse gas forcing. When the noise is multiplicative, the noise-magnitude depends on the state-variable, and this will influence the statistical moments in a manner that differs from the additive case, which we analyzed in Part I of this study. The state variable describing the deterministic backbone of our model is the energy, $E(t)$, contained in the ice or the ocean and for a thorough comparison and contrast we choose the simplest form of multiplicative noise $\\sigma E(t) \\xi(t)$, where $\\sigma$ is the noise amplitude and $\\xi(t)$ is the noise process. The case of constant additive noise (CA) we write as $\\sigma\\overline{E_S}\\xi(t)$, in which $\\overline{E_S}$ is the seasonally averaged value of the periodic deterministic steady-state solution $E_S(t)$, or the deterministic seasonal cycle. We then treat the case of seasonally-varyi...

  5. The Nuclear Material Focus Area Roadmapping Process Utilizing Environmental Management Complex-Wide Nuclear Material Disposition Pathways

    SciTech Connect (OSTI)

    Sala, D. R.; Furhman, P.; Smith, J. D.

    2002-02-26

    This paper describes the process that the Nuclear Materials Focus Area (NMFA) has developed and utilizes in working with individual Department of Energy (DOE) sites to identify, address, and prioritize research and development efforts in the stabilization, disposition, and storage of nuclear materials. By associating site technology needs with nuclear disposition pathways and integrating those with site schedules, the NMFA is developing a complex wide roadmap for nuclear material technology development. This approach will leverage technology needs and opportunities at multiple sites and assist the NMFA in building a defensible research and development program to address the nuclear material technology needs across the complex.

  6. Multiple channel data acquisition system

    DOE Patents [OSTI]

    Crawley, H.B.; Rosenberg, E.I.; Meyer, W.T.; Gorbics, M.S.; Thomas, W.D.; McKay, R.L.; Homer, J.F. Jr.

    1990-05-22

    A multiple channel data acquisition system for the transfer of large amounts of data from a multiplicity of data channels has a plurality of modules which operate in parallel to convert analog signals to digital data and transfer that data to a communications host via a FASTBUS. Each module has a plurality of submodules which include a front end buffer (FEB) connected to input circuitry having an analog to digital converter with cache memory for each of a plurality of channels. The submodules are interfaced with the FASTBUS via a FASTBUS coupler which controls a module bus and a module memory. The system is triggered to effect rapid parallel data samplings which are stored to the cache memories. The cache memories are uploaded to the FEBs during which zero suppression occurs. The data in the FEBs is reformatted and compressed by a local processor during transfer to the module memory. The FASTBUS coupler is used by the communications host to upload the compressed and formatted data from the module memory. The local processor executes programs which are downloaded to the module memory through the FASTBUS coupler. 25 figs.

  7. Multiple protocol fluorometer and method

    DOE Patents [OSTI]

    Kolber, Zbigniew S. (Shoreham, NY); Falkowski, Paul G. (Stony Brook, NY)

    2000-09-19

    A multiple protocol fluorometer measures photosynthetic parameters of phytoplankton and higher plants using actively stimulated fluorescence protocols. The measured parameters include spectrally-resolved functional and optical absorption cross sections of PSII, extent of energy transfer between reaction centers of PSII, F.sub.0 (minimal), F.sub.m (maximal) and F.sub.v (variable) components of PSII fluorescence, photochemical and non-photochemical quenching, size of the plastoquinone (PQ) pool, and the kinetics of electron transport between Q.sub.a and PQ pool and between PQ pool and PSI. The multiple protocol fluorometer, in one embodiment, is equipped with an excitation source having a controlled spectral output range between 420 nm and 555 nm and capable of generating flashlets having a duration of 0.125-32 .mu.s, an interval between 0.5 .mu.s and 2 seconds, and peak optical power of up to 2 W/cm.sup.2. The excitation source is also capable of generating, simultaneous with the flashlets, a controlled continuous, background illumination.

  8. Traffic flow wide-area surveillance system definition

    SciTech Connect (OSTI)

    Allgood, G.O.; Ferrell, R.K.; Kercel, S.W.; Abston, R.A.; Carnal, C.L. [Oak Ridge National Lab., TN (United States); Moynihan, P.I. [Jet Propulsion Lab., Pasadena, CA (United States)

    1994-11-01

    Traffic Flow Wide-Area Surveillance (TFWAS) is a system for assessing the state of traffic flow over a wide area for enhanced traffic control and improved traffic management and planning. The primary purpose of a TFWAS system is to provide a detailed traffic flow description and context description to sophisticated traffic management and control systems being developed or envisioned for the future. A successful TFWAS system must possess the attributes of safety, reconfigurability, reliability, and expandability. The primary safety premise of TFWAS is to ensure that no action or failure of the TFWAS system or its components can result in risk of injury to humans. A wide variety of communication techniques is available for use with TFWAS systems. These communication techniques can be broken down into two categories, landlines and wireless. Currently used and possible future traffic sensing technologies have been examined. Important criteria for selecting TFWAS sensors include sensor capabilities, costs, operational constraints, sensor compatibility with the infrastructure, and extent. TFWAS is a concept that can take advantage of the strengths of different traffic sensing technologies, can readily adapt to newly developed technologies, and can grow with the development of new traffic control strategies. By developing innovative algorithms that will take information from a variety of sensor types and develop descriptions of traffic flows over a wide area, a more comprehensive understanding of the traffic state can be provided to the control system to perform the most reasonable control actions over the entire wide area. The capability of characterizing the state of traffic over an entire region should revolutionize developments in traffic control strategies.

  9. Single Cells Spreading on a Protein Lattice Adopt an Energy Minimizing Shape Benoit Vianay,1,* Jos Kafer,2,

    E-Print Network [OSTI]

    Single Cells Spreading on a Protein Lattice Adopt an Energy Minimizing Shape Benoit Vianay,1,* Jos diagram obtained numerically suggest that the observed shapes correspond to metastable states in an energy landscape. Our results justify in fine the purely mechanical approach used in alternative models [17

  10. 368 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 4, NO. 1, JANUARY 2014 The Impact of Silicon CCD Photon Spread on

    E-Print Network [OSTI]

    be achieved. Short-pass filtering provides partial correction of the photon spread with the advantage material at all stages of fabrication, from bricks and as-cut wafers to complete solar cells for Sustainable Energy Systems, Australian National University, Canberra, A.C.T. 2602, Australia (e-mail: daniel

  11. What can you do to stop the flu? Cover your cough! Help stop the spread of germs by

    E-Print Network [OSTI]

    Burke, Peter

    What can you do to stop the flu? · Cover your cough! Help stop the spread of germs by covering your mouth and nose when you cough or sneeze with a tissue or with your upper sleeve. · Wash your hands surfaces. · Flu symptoms include: - Fever - Extreme tiredness - Headache - Cough - Muscle aches - Runny

  12. Profit-Charging Market Makers with Bounded Loss, Vanishing Bid/Ask Spreads, and Unlimited Market Depth

    E-Print Network [OSTI]

    Fiat, Amos

    are oppo- sitional. In this paper, we design market makers that satisfy all four. We achieveProfit-Charging Market Makers with Bounded Loss, Vanishing Bid/Ask Spreads, and Unlimited Market desiderata for automated market makers have appeared in the literature: (1) bounded loss, (2) the abil- ity

  13. Profit-Charging Market Makers with Bounded Loss, Vanishing Bid/Ask Spreads, and Unlimited Market Depth

    E-Print Network [OSTI]

    are oppo- sitional. In this paper, we design market makers that satisfy all four. We achieve-agent Systems General Terms: Algorithms, Design, Economics Additional Key Words and Phrases: Market MakingProfit-Charging Market Makers with Bounded Loss, Vanishing Bid/Ask Spreads, and Unlimited Market

  14. Analysis of farm-to-retail price spreads for whole and two percent milk in seven selected cities 

    E-Print Network [OSTI]

    Dickerson, Marla Lashea

    2004-09-30

    price spread of whole and two percent milk were the retail price for whole and two percent milk, marketing costs such as fuel and labor costs, milk production, seasonality, and structural change. Monthly data were collected over a 106 month period...

  15. ICELANDIC RHYTHMICS: ANNUAL MODULATION OF LAND ELEVATION AND PLATE SPREADING BY SNOW LOAD (AGU G33B-0055)

    E-Print Network [OSTI]

    Grapenthin, Ronni

    ICELANDIC RHYTHMICS: ANNUAL MODULATION OF LAND ELEVATION AND PLATE SPREADING BY SNOW LOAD (AGU ­ G Volcanological Center, Institute of Earth Sciences, University of Iceland, Reykjavik, Iceland 2 Icelandic Meteorological Office, Reykjavik, Iceland 3 IRD, UMR5559, Laboratoire de Geophysique Interne et Tectonophysique

  16. Stable Electron Beams With Low Absolute Energy Spread From a Laser Wakefield Accelerator With Plasma Density Ramp Controlled Injection

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    -keV level energy spread and central energy sta- bility by using the plasma density profile to control self is reached. Because dephasing limits electron energy gain [2], low densities ( to order of 100 keV at GeV energies and beyond. RESULTS In the present experiments, the density profile

  17. Microprocessor-controlled, wide-range streak camera

    SciTech Connect (OSTI)

    Amy E. Lewis, Craig Hollabaugh

    2006-09-01

    Bechtel Nevada/NSTec recently announced deployment of their fifth generation streak camera. This camera incorporates many advanced features beyond those currently available for streak cameras. The arc-resistant driver includes a trigger lockout mechanism, actively monitors input trigger levels, and incorporates a high-voltage fault interrupter for user safety and tube protection. The camera is completely modular and may deflect over a variable full-sweep time of 15 nanoseconds to 500 microseconds. The camera design is compatible with both large- and small-format commercial tubes from several vendors. The embedded microprocessor offers Ethernet connectivity, and XML [extensible markup language]-based configuration management with non-volatile parameter storage using flash-based storage media. The camera’s user interface is platform-independent (Microsoft Windows, Unix, Linux, Macintosh OSX) and is accessible using an AJAX [asynchronous Javascript and XML]-equipped modem browser, such as Internet Explorer 6, Firefox, or Safari. User interface operation requires no installation of client software or browser plug-in technology. Automation software can also access the camera configuration and control using HTTP [hypertext transfer protocol]. The software architecture supports multiple-simultaneous clients, multiple cameras, and multiple module access with a standard browser. The entire user interface can be customized.

  18. Spinal cord gray matter atrophy correlates with multiple sclerosis disability

    E-Print Network [OSTI]

    2014-01-01

    Atrophy Correlates with Multiple Sclerosis Disability Regina1,5,6 Objective: In multiple sclerosis (MS), cerebral grayPMS 5 progressive multiple sclerosis; RMS 5 relapsing

  19. In vivo evidence of glutamate toxicity in multiple sclerosis

    E-Print Network [OSTI]

    2014-01-01

    relapsing-remitting multiple sclerosis. A two year follow-upEDSS) 27 and the Multiple Sclerosis Functional Composite (P, Pitt D, Raine CS. Multiple sclerosis: altered glutamate

  20. Prognostic biomarkers of IFNb therapy in multiple sclerosis patients

    E-Print Network [OSTI]

    2015-01-01

    beta-1a Subcutaneously in Multiple Sclerosis) Study Group.1a in relapsing/remitting multiple sclerosis. Lancet 1998;BAC) and the National Multiple Sclerosis Society (to SEB).

  1. Genetic associations with brain cortical thickness in multiple sclerosis

    E-Print Network [OSTI]

    2015-01-01

    Weinshenker, B.G. (2000) Multiple sclerosis. N Engl J Medcorrelations in multiple sclerosis: HLA genes in?uencecerebral cortex in multiple sclerosis. Brain 126, Shannon,

  2. PHY and MAC Layer Design of Hybrid Spread Spectrum Based Smart Meter Network

    SciTech Connect (OSTI)

    Kuruganti, Phani Teja

    2012-01-01

    The smart grid is a combined process of revitalizing the traditional power grid applications and introducing new applications to improve the efficiency of power generation, transmission and distribution. This can be achieved by leveraging advanced communication and networking technologies. Therefore the selection of the appropriate communication technology for different smart grid applications has been debated a lot in the recent past. After comparing different possible technologies, a recent research study has arrived at a conclusion that the 3G cellular technology is the right choice for distribution side smart grid applications like smart metering, advanced distribution automation and demand response management system. In this paper, we argue that the current 3G/4G cellular technologies are not an appropriate choice for smart grid distribution applications and propose a Hybrid Spread Spectrum (HSS) based Advanced Metering Infrastructure (AMI) as one of the alternatives to 3G/4G technologies. We present a preliminary PHY and MAC layer design of a HSS based AMI network and evaluate their performance using matlab and NS2 simulations. Also, we propose a time hierarchical scheme that can significantly reduce the volume of random access traffic generated during blackouts and the delay in power outage reporting.

  3. The Formation of the Wide Asynchronous Binary Asteroid Population

    E-Print Network [OSTI]

    Jacobson, Seth A; McMahon, Jay

    2013-01-01

    We propose and analyze a new mechanism for the formation of the wide asynchronous binary population. These binary asteroids have wide semi-major axes relative to most near-Earth and Main Belt asteroid systems. Confirmed members have rapidly rotating primaries and satellites that are not tidally locked. Previously suggested formation mechanisms from impact ejecta, planetary flybys and directly from rotational fission events cannot satisfy all of the observations. The newly hypothesized mechanism works as follows: (i) these systems are formed from rotational fission, (ii) their satellites are tidally locked, (iii) their orbits are expanded by the BYORP effect, (iv) their satellites de-synchronize due to the adiabatic invariance between the libration of the secondary and the mutual orbit, and (v) the secondary avoids resynchronization due to the the YORP effect. This seemingly complex chain of events is a natural pathway for binaries with satellites that have particular shapes, which define the BYORP effect torq...

  4. Comparison of Wide-Bandgap Semiconductors for Power Electronics Applications

    SciTech Connect (OSTI)

    Ozpineci, B.

    2004-01-02

    Recent developmental advances have allowed silicon (Si) semiconductor technology to approach the theoretical limits of the Si material; however, power device requirements for many applications are at a point that the present Si-based power devices cannot handle. The requirements include higher blocking voltages, switching frequencies, efficiency, and reliability. To overcome these limitations, new semiconductor materials for power device applications are needed. For high power requirements, wide-bandgap semiconductors like silicon carbide (SiC), gallium nitride (GaN), and diamond, with their superior electrical properties, are likely candidates to replace Si in the near future. This report compares wide-bandgap semiconductors with respect to their promise and applicability for power applications and predicts the future of power device semiconductor materials.

  5. Charged Particle Multiplicities in Ultra-relativistic Au+Au and Cu+Cu Collisions

    E-Print Network [OSTI]

    B. B. Back

    2006-04-26

    The PHOBOS collaboration has carried out a systematic study of charged particle multiplicities in Cu+Cu and Au+Au collisions at the Relativistic Heavy-Ion Collider (RHIC) at Brookhaven National Laboratory. A unique feature of the PHOBOS detector is its ability to measure charged particles over a very wide angular range from 0.5 to 179.5 deg. corresponding to |eta|<5.4. The general features of the charged particle multiplicity distributions as a function of pseudo-rapidity, collision energy and centrality, as well as system size, are discussed.

  6. Martinez Refinery Completes Plant-Wide Energy Assessment

    SciTech Connect (OSTI)

    2002-11-01

    This OIT BestPractices Case Study describes how the Equilon Enterprises oil refinery in Martinez, California undertook a plant-wide energy assessment that focused on three key areas: waste minimization, process debottlenecking, and operations optimization. The assessment yielded recommendations, which, if implemented, can save more than 6,000,000 MMBtu per year and an estimated $52,000,000 per year, plus improve process control and reduce waste.

  7. A Cosmology Calculator for the World Wide Web

    E-Print Network [OSTI]

    Edward L. Wright

    2006-10-10

    A cosmology calculator that computes times and distances as a function of redshift for user-defined cosmological parameters is available on the World Wide Web. This note gives the formulae used by the cosmology calculator and discusses some of its implementation. A version of the calculator that allows one to specify the equation of state parameter w and w' and neutrino masses, and a version for converting the light travel times usually given in the popular press into redshifts are also available.

  8. Horizontal film balance having wide range and high sensitivity

    DOE Patents [OSTI]

    Abraham, B.M.; Miyano, K.; Ketterson, J.B.

    1981-03-05

    A thin-film, horizontal balance instrument is provided for measuring surface tension (surface energy) of thin films suspended on a liquid substrate. The balance includes a support bearing and an optical feedback arrangement for wide-range, high sensitivity measurements. The force on the instrument is balanced by an electromagnet, the current through the magnet providing a measure of the force applied to the instrument. A novel float construction is also disclosed.

  9. Horizontal film balance having wide range and high sensitivity

    DOE Patents [OSTI]

    Abraham, Bernard M. (Oak Park, IL); Miyano, Kenjiro (Downers Grove, IL); Ketterson, John B. (Evanston, IL)

    1983-01-01

    A thin-film, horizontal balance instrument is provided for measuring surface tension (surface energy) of thin films suspended on a liquid substrate. The balance includes a support bearing and an optical feedback arrangement for wide-range, high sensitivity measurements. The force on the instrument is balanced by an electromagnet, the current through the magnet providing a measure of the force applied to the instrument. A novel float construction is also disclosed.

  10. Horizontal film balance having wide range and high sensitivity

    DOE Patents [OSTI]

    Abraham, B.M.; Miyano, K.; Ketterson, J.B.

    1983-11-08

    A thin-film, horizontal balance instrument is provided for measuring surface tension (surface energy) of thin films suspended on a liquid substrate. The balance includes a support bearing and an optical feedback arrangement for wide-range, high sensitivity measurements. The force on the instrument is balanced by an electromagnet, the current through the magnet providing a measure of the force applied to the instrument. A novel float construction is also disclosed. 5 figs.

  11. Wide swath imaging spectrometer utilizing a multi-modular design

    DOE Patents [OSTI]

    Chrisp, Michael P. (Danville, CA)

    2010-10-05

    A wide swath imaging spectrometer utilizing an array of individual spectrometer modules in the telescope focal plane to provide an extended field of view. The spectrometer modules with their individual detectors are arranged so that their slits overlap with motion on the scene providing contiguous spatial coverage. The number of modules can be varied to take full advantage of the field of view available from the telescope.

  12. Science with a wide-field UV transient explorer

    SciTech Connect (OSTI)

    Sagiv, I.; Gal-Yam, A.; Ofek, E. O.; Waxman, E.; Trakhtenbrot, B.; Topaz, J. [Benoziyo Center for Astrophysics, Weizmann Institute of Science, 76100 Rehovot (Israel); Aharonson, O. [Helen Kimmel Center for Planetary Science, Weizmann Institute of Science, 76100 Rehovot (Israel); Kulkarni, S. R.; Phinney, E. S. [Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA 91125 (United States); Nakar, E.; Maoz, D. [School of Physics and Astronomy, Tel Aviv University, 93387 Tel Aviv (Israel); Beichman, C. [Division of Geophysics and Planetary Science, California Institute of Technology, Pasadena, CA 91105 (United States); Murthy, J. [Indian Institute of Astrophysics, Koramangala, Bangalore 560034 (India); Worden, S. P. [NASA Ames Research Center, Moffett Field, CA 94035 (United States)

    2014-04-01

    The time-variable electromagnetic sky has been well-explored at a wide range of wavelengths. In contrast, the ultra-violet (UV) variable sky is relatively poorly explored, even though it offers exciting scientific prospects. Here, we review the potential scientific impact of a wide-field UV survey on the study of explosive and other transient events, as well as known classes of variable objects, such as active galactic nuclei and variable stars. We quantify our predictions using a fiducial set of observational parameters which are similar to those envisaged for the proposed ULTRASAT mission. We show that such a mission would be able to revolutionize our knowledge about massive star explosions by measuring the early UV emission from hundreds of events, revealing key physical parameters of the exploding progenitor stars. Such a mission would also detect the UV emission from many tens of tidal-disruption events of stars by supermassive black holes at galactic nuclei and enable a measurement of the rate of such events. The overlap of such a wide-field UV mission with existing and planned gravitational-wave and high-energy neutrino telescopes makes it especially timely.

  13. Wide-area situation awareness in electric power grid

    SciTech Connect (OSTI)

    Greitzer, Frank L.

    2010-04-28

    Two primary elements of the US energy policy are demand management and efficiency and renewable sources. Major objectives are clean energy transmission and integration, reliable energy transmission, and grid cyber security. Development of the Smart Grid seeks to achieve these goals by lowering energy costs for consumers, achieving energy independence and reducing greenhouse gas emissions. The Smart Grid is expected to enable real time wide-area situation awareness (SA) for operators. Requirements for wide-area SA have been identified among interoperability standards proposed by the Federal Energy Regulatory Commission and the National Institute of Standards and Technology to ensure smart-grid functionality. Wide-area SA and enhanced decision support and visualization tools are key elements in the transformation to the Smart Grid. This paper discusses human factors research to promote SA in the electric power grid and the Smart Grid. Topics that will be discussed include the role of human factors in meeting US energy policy goals, the impact and challenges for Smart Grid development, and cyber security challenges.

  14. Canmet hydrocracking handles wide range of heavy crudes

    SciTech Connect (OSTI)

    Waugh, R.J.; Chambers, L.W.; Menzies, M.A.; Patmore, D.J.

    1983-03-01

    The track record of successful or realistic projections within industry over recent years has not exactly been outstanding. It almost seems that as the tools and methods that are available become more sophisticated, the less effective they are because of our inability to predict major events and their adverse impact on otherwise realistic projections. Crude oil sources, gravity and prices coupled with product type, demand and quality have all been affected. One thing that one can say with reasonable certainty is that there is no apparent reason to assume that the scene will stabilize in the near or mid-term future. Thus, the refiner is faced with continuing uncertainty as to crude source and product demand. He, therefore, has need to maintain flexibility in being able to process as wide a range of crudes and to produce as wide a range of products as possible. This paper postulates that the CANMET Hydrocracking Process can assist in achieving a greater degree of flexibility in refinery operation through its ability to handle a wide range of heavy feedstocks. The authors report new yield data for heavy feeds and the status of the previously announced demonstration unit. The unit is being designed on the basis of extensive data developed at the CANMET and Petro Canada laboratories in Ottawa and Calgary, Alberta, respectively. The paper concludes with a suggested modular application of CANMET hydrocracking to Athabasca Tar Sands development.

  15. Wide binaries as a critical test for Gravity theories

    E-Print Network [OSTI]

    X. Hernandez; M. A. Jimenez; C. Allen

    2012-05-25

    Assuming Newton's gravity and GR to be valid at all scales leads to the dark matter hypothesis as a requirement demanded by the observed dynamics and measured baryonic content at galactic and extragalactic scales. Alternatively, modified gravity scenarios where a change of regime appears at acceleration scales $awide binary stars. Since for $1 M_{\\odot}$ systems the acceleration drops below $a_{0}$ at scales of around 7000 AU, a statistical survey of wide binaries with relative velocities and separations reaching $10^{4}$ AU and beyond should prove useful to the above debate. We apply the proposed test to the best currently available data. Results show a constant upper limit to the relative velocities in wide binaries which is independent of separation for over three orders of magnitude, in analogy with galactic flat rotation curves in the same $a

  16. Formation of the wide asynchronous binary asteroid population

    SciTech Connect (OSTI)

    Jacobson, Seth A. [Department of Astrophysical and Planetary Science, UCB 391, University of Colorado, Boulder, CO 80309 (United States); Scheeres, Daniel J.; McMahon, Jay [Department of Aerospace Engineering Sciences, UCB 429, University of Colorado, Boulder, CO 80309 (United States)

    2014-01-01

    We propose and analyze a new mechanism for the formation of the wide asynchronous binary population. These binary asteroids have wide semimajor axes relative to most near-Earth and main belt asteroid systems. Confirmed members have rapidly rotating primaries and satellites that are not tidally locked. Previously suggested formation mechanisms from impact ejecta, from planetary flybys, and directly from rotational fission events cannot satisfy all of the observations. The newly hypothesized mechanism works as follows: (1) these systems are formed from rotational fission, (2) their satellites are tidally locked, (3) their orbits are expanded by the binary Yarkovsky-O'Keefe-Radzievskii-Paddack (BYORP) effect, (4) their satellites desynchronize as a result of the adiabatic invariance between the libration of the secondary and the mutual orbit, and (5) the secondary avoids resynchronization because of the YORP effect. This seemingly complex chain of events is a natural pathway for binaries with satellites that have particular shapes, which define the BYORP effect torque that acts on the system. After detailing the theory, we analyze each of the wide asynchronous binary members and candidates to assess their most likely formation mechanism. Finally, we suggest possible future observations to check and constrain our hypothesis.

  17. Coulomb pairing resonances in multiple-ring aromatic molecules

    E-Print Network [OSTI]

    Huber, D L

    2015-01-01

    We present an analysis of the Coulomb pairing resonances observed in photo-double-ionization studies of CnHm aromatic molecules with multiple benzene-like rings. It is applied to naphthalene, anthracene, phenanthrene, pyrene and coronene, all of which have six-member rings, and azulene which is comprised of a five-member and a seven-member ring. There is a high energy resonance at ~ 40 eV that is found in all of the molecules cited and is associated with paired electrons localized on carbon sites on the perimeter of the molecule, each of which having two carbon sites as nearest neighbors. The low energy resonance at 10 eV, which is found only in pyrene and coronene, is attributed to the formation of paired electrons localized on arrays of interior carbon atoms that have the point symmetry of the molecule with each carbon atom having three nearest neighbors. The origin of the anomalous increase in the doubly charged to singly charged parent-ion ratio that is found above the 40 eV resonance in all of the cited ...

  18. Simulation of ultrathin lubricant films spreading over various carbon Stephen J. Vinay, David M. Phillips, Young Sil Lee, Charles M. Schroeder, Xiaoding Ma et al.

    E-Print Network [OSTI]

    Schroeder, Charles

    Simulation of ultrathin lubricant films spreading over various carbon surfaces Stephen J. Vinay://jap.aip.org/about/rights_and_permissions #12;Simulation of ultrathin lubricant films spreading over various carbon surfaces Stephen J. Vinay surface composition and lubricant endgroup functionality, is described. Theoretical development based

  19. Inhibited cell spreading on polystyrene nanopillars fabricated by nanoimprinting and in situ This article has been downloaded from IOPscience. Please scroll down to see the full text article.

    E-Print Network [OSTI]

    Hu, Wenchuang "Walter"

    Inhibited cell spreading on polystyrene nanopillars fabricated by nanoimprinting and in situ elongation This article has been downloaded from IOPscience. Please scroll down to see the full text article Nanotechnology 21 (2010) 385301 (6pp) doi:10.1088/0957-4484/21/38/385301 Inhibited cell spreading on polystyrene

  20. Email networks and the spread of computer viruses M. E. J. Newman, 1 Stephanie Forrest, 1, 2 and Justin Balthrop 2

    E-Print Network [OSTI]

    Newman, Mark

    Email networks and the spread of computer viruses M. E. J. Newman, 1 Stephanie Forrest, 1, 2 Science, University of New Mexico, Albuquerque, NM 87131--1386 Many computer viruses spread via electronic of computer virus epidemics. The structure of various networks, including social and computer networks, has

  1. Multiple Nash-equilibrium in Quantum Game

    E-Print Network [OSTI]

    Georgy Parfionov

    2008-06-06

    Methods of exploring Nash equilibrium in quantum games are studied. Analytical conditions of the existence, the uniqueness or the multiplicity of the equilibria are found.

  2. Multiscale Mathematics For Plasma Kinetics Spanning Multiple...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Multiscale Mathematics For Plasma Kinetics Spanning Multiple Collisionality Regimes Citation Details In-Document Search Title: Multiscale Mathematics For Plasma...

  3. ORISE: Multiple research appointments available through Agricultural...

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

    Multiple research appointments available through Agricultural Research Service Postdoctoral Research Program Selected candidates participate in USDA research for one to four years...

  4. Automatic Routing Using Multiple Prefix Labels

    E-Print Network [OSTI]

    Garcia-Luna-Aceves, J.J.; Ghosh, R.

    2012-01-01

    Automatic Routing Using Multiple Prefix Labels Rumi GhoshWe present Multi-label Automatic Routing (MAR), the firstthe routing is automatic based on the positional labels of

  5. Extreme multiplex spectroscopy at wide-field 4-m telescopes

    E-Print Network [OSTI]

    Robert Content; Tom Shanks

    2008-08-18

    We describe the design and science case for a spectrograph for the prime focus of classical 4-m wide-field telescopes that can deliver at least 4000 MOS slits over a 1 degree field. This extreme multiplex capability means that 25000 galaxy redshifts can be measured in a single night, opening up the possibilities for large galaxy redshift surveys out to z~0.7 and beyond for the purpose of measuring the Baryon Acoustic Oscillation (BAO) scale and for many other science goals. The design features four cloned spectrographs and exploits the exclusive possibility of tiling the focal plane of wide-field 4-m telescopes with CCDs for multi-object spectroscopic purposes. In ~200 night projects, such spectrographs have the potential to make galaxy redshift surveys of ~6 million galaxies over a wide redshift range and thus may provide a low-cost alternative to other survey routes such as WFMOS and SKA. Two of these extreme multiplex spectrographs are currently being designed for the AAT (NG1dF) and Calar Alto (XMS) 4-m class telescopes. NG2dF, a larger version for the AAT 2 degree field, would have 12 clones and at least 12000 slits. The clones use a transparent design including a grism in which all optics are smaller than the clone square subfield so that the clones can be tightly packed with little gaps between the contiguous fields. Only low cost glasses are used; the variations in chromatic aberrations between bands are compensated by changing one or two of the lenses adjacent to the grism. The total weight and length is smaller with a few clones than a unique spectrograph which makes it feasible to place the spectrograph at the prime focus.

  6. Development of Autonomous Magnetometer Rotorcraft For Wide Area Assessment

    SciTech Connect (OSTI)

    Mark D. McKay; Matthew O. Anderson

    2011-08-01

    Large areas across the United States and internationally are potentially contaminated with unexploded ordinance (UXO), with some ranges encompassing tens to hundreds of thousands of acres. Technologies are needed which will allow for cost effective wide area scanning with (1) near 100% coverage and (2) near 100% detection of subsurface ordnance or features indicative of subsurface ordnance. The current approach to wide area assessment is a multi-level one, in which medium - altitude fixed wing optical imaging is used for an initial site assessment. This assessment is followed with low altitude manned helicopter based magnetometry. Subsequent to this wide area assessment targeted surface investigations are performed using either towed geophysical sensor arrays or man portable sensors. In order to be an effective tool for small UXO detection, the sensing altitude for magnetic site investigations needs to be on the order of 1 to 3 meters. These altitude requirements mean that manned helicopter surveys will generally only be feasible in large, open and relatively flat terrains. While such surveys are effective in mapping large areas relatively fast there are substantial mobilization/demobilization, staffing and equipment costs associated with these surveys, resulting in costs of approximately $100-$150/acre. In addition, due to the low altitude there are substantial risks to pilots and equipment. Surface towed arrays provide highresolution maps but have other limitations, e.g. in their ability to navigate rough terrain effectively. Thus there is a need for other systems, which can be used for effective data collection. An Unmanned Aerial Vehicle (UAV) magnetometer platform is an obvious alternative. The motivation behind such a system is that it reduces risk to operators, is lower in initial and Operational and Maintenance (O&M) costs (and can thus potentially be applied to smaller sites) and has the potential of being more effective in terms of detection and possibly characterization (through the use of dynamic acquisition, i.e. survey mission in-flight reprioritization).

  7. West-wide Energy Corridors | 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| Open Energy Information Serbia-EnhancingEtGeorgia: Energy ResourcesTurin, New York: EnergyWareham,(BLM)West-wide

  8. Wide band cryogenic ultra-high vacuum microwave absorber

    DOE Patents [OSTI]

    Campisi, Isidoro E. (Newport News, VA)

    1992-01-01

    An absorber wave guide assembly for absorbing higher order modes of microwave energy under cryogenic ultra-high vacuum conditions, that absorbs wide-band multi-mode energy. The absorber is of a special triangular shape, made from flat tiles of silicon carbide and aluminum nitride. The leading sharp end of the absorber is located in a corner of the wave guide and tapers to a larger cross-sectional area whose center is located approximately in the center of the wave guide. The absorber is relatively short, being of less height than the maximum width of the wave guide.

  9. A Wide Range Neutron Detector for Space Nuclear Reactor Applications

    SciTech Connect (OSTI)

    Nassif, Eduardo; Sismonda, Miguel; Matatagui, Emilio; Pretorius, Stephan

    2007-01-30

    We propose here a versatile and innovative solution for monitoring and controlling a space-based nuclear reactor that is based on technology already proved in ground based reactors. A Wide Range Neutron Detector (WRND) allows for a reduction in the complexity of space based nuclear instrumentation and control systems. A ground model, predecessor of the proposed system, has been installed and is operating at the OPAL (Open Pool Advanced Light Water Research Reactor) in Australia, providing long term functional data. A space compatible Engineering Qualification Model of the WRND has been developed, manufactured and verified satisfactorily by analysis, and is currently under environmental testing.

  10. DOE-Wide NEPA Contracting | 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: Alternative Fuels DataEnergy Webinar:IAbout Us| Department of EnergyOctoberDOE-Wide NEPA

  11. A Dynamical Signature of Multiple Stellar Populations in 47 Tucanae

    E-Print Network [OSTI]

    Richer, Harvey B; Anderson, Jay; Kalirai, Jason S; Shara, Michael M; Dotter, Aaron; Fahlman, Gregory G; Rich, R Michael

    2013-01-01

    Based on the width of its main sequence, and an actual observed split when viewed through particular filters, it is widely accepted that 47 Tucanae contains multiple stellar populations. In this contribution, we divide the main-sequence of 47 Tuc into four color groups, which presumably represent stars of various chemical compositions. The kinematic properties of each of these groups is explored via proper-motions, and a strong signal emerges of differing proper-motion anisotropies with differing main-sequence color; the bluest main-sequence stars exhibit the largest proper-motion anisotropy which becomes undetectable for the reddest stars. In addition, the bluest stars are also the most centrally concentrated. A simiilar analysis for SMC stars, which are located in the background of 47 Tuc on our frames, yields none of the anisotropy exhibited by the 47 Tuc stars. We discuss implications of these results for possible formation scenarios of the various populations.

  12. TMD-MPI: AN MPI IMPLEMENTATION FOR MULTIPLE PROCESSORS ACROSS MULTIPLE FPGAS

    E-Print Network [OSTI]

    Chow, Paul

    TMD-MPI: AN MPI IMPLEMENTATION FOR MULTIPLE PROCESSORS ACROSS MULTIPLE FPGAS Manuel Salda~na the CMC/SOCRN, Xilinx for hardware and tools, and CONACYT in Mexico provided funding to Manuel Salda~na

  13. Code design for multiple-input multiple-output broadcast channels 

    E-Print Network [OSTI]

    Uppal, Momin Ayub

    2009-06-02

    Recent information theoretical results indicate that dirty-paper coding (DPC) achieves the entire capacity region of the Gaussian multiple-input multiple-output (MIMO) broadcast channel (BC). This thesis presents practical ...

  14. EIS-0380: EPA Notice of Availability of the Final Site-Wide Environmen...

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

    EPA Notice of Availability of the Final Site-Wide Environmental Impact Statement EIS-0380: EPA Notice of Availability of the Final Site-Wide Environmental Impact Statement...

  15. Portsmouth RI/FS Report for the Site-Wide Waste Disposition Evaluation...

    Energy Savers [EERE]

    RIFS Report for the Site-Wide Waste Disposition Evaluation Project Portsmouth RIFS Report for the Site-Wide Waste Disposition Evaluation Project This Remedial Investigation and...

  16. National Training Center (NTC) Launches a New DOE-Wide Voluntary...

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

    National Training Center (NTC) Launches a New DOE-Wide Voluntary Training Reciprocity and Collaboration Initiative National Training Center (NTC) Launches a New DOE-Wide Voluntary...

  17. Innovative static spectropolarimeter concept for wide spectral ranges: tolerancing study

    E-Print Network [OSTI]

    Pertenais, Martin; Parès, Laurent; Petit, Pascal

    2015-01-01

    Developing an efficient and robust polarimeter for wide spectral ranges and space applications is a main issue in many projects. As part of the UVMag consortium created to develop UV facilities in space (e.g. the Arago mission proposed to ESA), we are studying an innovative concept of polarimeter that is robust, simple, and efficient on a wide spectral range. The idea, based on the article by Sparks et al. (2012), is to use polarization scramblers to create a spatial modulation of the polarization. Along the height of the wedges of the scramblers, the thickness of the birefringent material crossed by the light, and thus the retardance, vary continuously. This variation creates an intensity modulation of the light related to the entrance polarization state. Analyzing this modulation with a linear polarizer, and dispersing the light spectrally in the orthogonal spatial direction, enables the measurement of the full Stokes vector over the entire spectrum. This determination is performed with a single-shot measur...

  18. A wide binary trigger for white dwarf pollution

    E-Print Network [OSTI]

    Bonsor, Amy

    2015-01-01

    Metal pollution in white dwarf atmospheres is likely to be a signature of remnant planetary systems. Most explanations for this pollution predict a sharp decrease in the number of polluted systems with white dwarf cooling age. Observations do not confirm this trend, and metal pollution in old (1-5 Gyr) white dwarfs is difficult to explain. We propose an alternative, time-independent mechanism to produce the white dwarf pollution. The orbit of a wide binary companion can be perturbed by Galactic tides, approaching close to the primary star for the first time after billions of years of evolution on the white dwarf branch. We show that such a close approach perturbs a planetary system orbiting the white dwarf, scattering planetesimals onto star-grazing orbits, in a manner that could pollute the white dwarf's atmosphere. Our estimates find that this mechanism is likely to contribute to metal pollution, alongside other mechanisms, in up to a few percent of an observed sample of white dwarfs with wide binary compan...

  19. Geological problems in radioactive waste isolation - A world wide review

    SciTech Connect (OSTI)

    Witherspoon, P.A. [Lawrence Berkeley Lab., CA (United States)

    1991-06-01

    The problem of isolating radioactive wastes from the biosphere presents specialists in the earth sciences with some of the most complicated problems they have ever encountered. This is especially true for high-level waste (HLW), which must be isolated in the underground and away from the biosphere for thousands of years. The most widely accepted method of doing this is to seal the radioactive materials in metal canisters that are enclosed by a protective sheath and placed underground in a repository that has been carefully constructed in an appropriate rock formation. Much new technology is being developed to solve the problems that have been raised, and there is a continuing need to publish the results of new developments for the benefit of all concerned. Table 1 presents a summary of the various formations under investigation according to the reports submitted for this world wide review. It can be seen that in those countries that are searching for repository sites, granitic and metamorphic rocks are the prevalent rock type under investigation. Six countries have developed underground research facilities that are currently in use. All of these investigations are in saturated systems below the water table, except the United States project, which is in the unsaturated zone of a fractured tuff.

  20. The World-Wide Quest for Better Web Search The World Wide Web is an ever-growing sea of information. The volume

    E-Print Network [OSTI]

    The World-Wide Quest for Better Web Search The World Wide Web is an ever-growing sea of information from all over the world are surfing in search of information on every possible walk of life. Web search

  1. Capacity Allocation in Multi-cell UMTS Networks for Different Spreading Factors with Perfect and Imperfect Power Control

    E-Print Network [OSTI]

    Akl, Robert

    -to-interference thresh- old from 5 dB to 10 dB and spreading factor values of 256, 64, 16, and 4. 1. Introduction 3G Erlang capacity based on the Lost Call Held (LCH) model as described in [4]. This algorithm cal- culates derive a closed form ex- pression of Erlang capacity for a single type of traffic loading and compare

  2. 36-220 Lab #11 Multiple Regression

    E-Print Network [OSTI]

    Spirtes, Peter

    36-220 Lab #11 Multiple Regression Please write your name below, tear off this front page and give;36-220 Lab #11 Multiple Regression First let's download the dataset we will need for the lab. Download gas Simple Regression Analysis 1. Fit the least squares regression line to describe the relationship between

  3. Persistent Surveillance Using Multiple Unmanned Air Vehicles

    E-Print Network [OSTI]

    Stanford University

    require long endurance and unmanned aerial vehicles are a natural choice for the sensing platforms1 Persistent Surveillance Using Multiple Unmanned Air Vehicles Nikhil Nigam and Ilan Kroo. These are tested in a multiple unmanned air vehicle (UAV) simulation environment, developed for this program

  4. Multiple Criteria Decision Support by Evolutionary Computation

    E-Print Network [OSTI]

    Zitzler, Eckart

    1 Multiple Criteria Decision Support by Evolutionary Computation Marco Laumanns, Eckart Zitzler difficult or impossible. In addition, they can handle multiple criteria simultaneously, being able to gener of these variables form the set of decision alternatives. The criteria to judge each decision relate to the output

  5. Photonic-assisted microwave frequency multiplication with a tunable multiplication factor

    E-Print Network [OSTI]

    Yao, Jianping

    Photonic-assisted microwave frequency multiplication with a tunable multiplication factor Liang Gao,1,2 Weilin Liu,1 Xiangfei Chen,2 and Jianping Yao1, * 1 Microwave Photonics Research Laboratory); published October 31, 2013 Photonic-assisted microwave frequency multiplication with a tunable

  6. Multiple-Source and Multiple-Destination Charge Migration in Hybrid Electrical Energy Storage Systems*

    E-Print Network [OSTI]

    Pedram, Massoud

    Multiple-Source and Multiple-Destination Charge Migration in Hybrid Electrical Energy Storage massimo.poncino@polito.it Abstract-- Hybrid electrical energy storage (HEES) systems consist of multiple banks of heterogeneous electrical energy storage (EES) elements that are connected to each other through

  7. Versatile wide angle diffraction setup for simultaneous wide and small angle x-ray scattering measurements with synchrotron radiation

    SciTech Connect (OSTI)

    Rueda, D.R.; Garcia-Gutierrez, M.C.; Nogales, A.; Capitan, M.J.; Ezquerra, T.A.; Labrador, A.; Fraga, E.; Beltran, D.; Juanhuix, J.; Herranz, J.F.; Bordas, J. [Instituto de Estructura de la Materia, CSIC, Serrano 119, 28006 Madrid (Spain); LLS, BM16-ESRF, 6 rue Jules Horowitz, BP220, 38043 Grenoble (France)

    2006-03-15

    Here we present a novel, simple, and versatile experimental setup aimed to perform wide angle x-ray scattering (WAXS) measurements alone or in simultaneous combination with small angle x-ray scattering measurements. The design of the WAXS goniometer allows one to obtain high resolution diffraction patterns in a broad angular range. The setup can incorporate a hot stage in order to evaluate temperature resolved experiments. The performance of the equipment has been verified in the BM16 beam line of the European Synchrotron Radiation Facility with different well known samples such as alumina, isotropic film of high density polyethylene (HDPE), and oriented HPDE fiber.

  8. Code optimization and analysis for multiple-input and multiple-output communication systems 

    E-Print Network [OSTI]

    Yue, Guosen

    2005-11-01

    at the output of the soft-input soft-output (SISO) multiuser detectors as a function of the pdf of input extrinsic messages, user spreading codes, channel impulse responses, and signal-to-noise ratios. Using these techniques, we are able to accurately compute...

  9. A Computing Environment to Support Repeatable Scientific Big Data Experimentation of World-Wide Scientific Literature

    SciTech Connect (OSTI)

    Schlicher, Bob G; Kulesz, James J; Abercrombie, Robert K; Kruse, Kara L

    2015-01-01

    A principal tenant of the scientific method is that experiments must be repeatable and relies on ceteris paribus (i.e., all other things being equal). As a scientific community, involved in data sciences, we must investigate ways to establish an environment where experiments can be repeated. We can no longer allude to where the data comes from, we must add rigor to the data collection and management process from which our analysis is conducted. This paper describes a computing environment to support repeatable scientific big data experimentation of world-wide scientific literature, and recommends a system that is housed at the Oak Ridge National Laboratory in order to provide value to investigators from government agencies, academic institutions, and industry entities. The described computing environment also adheres to the recently instituted digital data management plan mandated by multiple US government agencies, which involves all stages of the digital data life cycle including capture, analysis, sharing, and preservation. It particularly focuses on the sharing and preservation of digital research data. The details of this computing environment are explained within the context of cloud services by the three layer classification of Software as a Service , Platform as a Service , and Infrastructure as a Service .

  10. Ultra Wide Band RFID Neutron Tags for Nuclear Materials Monitoring

    SciTech Connect (OSTI)

    Nekoogar, F; Dowla, F; Wang, T

    2010-01-27

    Recent advancements in the ultra-wide band Radio Frequency Identification (RFID) technology and solid state pillar type neutron detectors have enabled us to move forward in combining both technologies for advanced neutron monitoring. The LLNL RFID tag is totally passive and will operate indefinitely without the need for batteries. The tag is compact, can be directly mounted on metal, and has high performance in dense and cluttered environments. The LLNL coin-sized pillar solid state neutron detector has achieved a thermal neutron detection efficiency of 20% and neutron/gamma discrimination of 1E5. These performance values are comparable to a fieldable {sup 3}He based detector. In this paper we will discuss features about the two technologies and some potential applications for the advanced safeguarding of nuclear materials.

  11. The University of Hawaii Wide Field Imager (UHWFI)

    E-Print Network [OSTI]

    Klaus W. Hodapp; Andreas Seifahrt; Gerard A. Luppino; Richard Wainscoat; Ed Sousa; Hubert Yamada; Alan Ryan; Richard Shelton; Mel Inouye; Andrew J. Pickles; Yanko K. Ivanov

    2006-04-01

    The University of Hawaii Wide-Field Imager (UHWFI) is a focal compressor system designed to project the full half-degree field of the UH 2.2 m telescope onto the refurbished UH 8Kx8K CCD camera. The optics use Ohara glasses and are mounted in an oil-filled cell to minimize light losses and ghost images from the large number of internal lens surfaces. The UHWFI is equipped with a six-position filter wheel and a rotating sector blade shutter,both driven by stepper motors. The instrument saw first light in 2004 in an engineering mode. After filling the lens cell with index matching oil, integration of all software components into the user interface, tuning of the CCD performance, and the purchase of the final filter set, UHWFI is now fully commissioned at the UH 2.2 m telescope.

  12. Wide-range radioactive-gas-concentration detector

    DOE Patents [OSTI]

    Anderson, D.F.

    1981-11-16

    A wide-range radioactive-gas-concentration detector and monitor capable of measuring radioactive-gas concentrations over a range of eight orders of magnitude is described. The device is designed to have an ionization chamber sufficiently small to give a fast response time for measuring radioactive gases but sufficiently large to provide accurate readings at low concentration levels. Closely spaced parallel-plate grids provide a uniform electric field in the active region to improve the accuracy of measurements and reduce ion migration time so as to virtually eliminate errors due to ion recombination. The parallel-plate grids are fabricated with a minimal surface area to reduce the effects of contamination resulting from absorption of contaminating materials on the surface of the grids. Additionally, the ionization-chamber wall is spaced a sufficient distance from the active region of the ionization chamber to minimize contamination effects.

  13. Wide-field surveys from the SNAP mission

    SciTech Connect (OSTI)

    agkim@lbl.gov

    2002-07-23

    The Supernova/Acceleration Probe (SNAP) is a proposed space-borne observatory that will survey the sky with a wide-field optical/NIR imager. The images produced by SNAP will have an unprecedented combination of depth, solid-angle, angular resolution, and temporal sampling. Two 7.5 square-degree fields will be observed every four days over 16 months to a magnitude depth of AB = 27.7 in each of nine filters. Co-adding images over all epochs will give an AB = 30.3 per filter. A 300 square-degree field will be surveyed with no repeat visits to AB = 28 per filter. The nine filters span 3500-17000 {angstrom}. Although the survey strategy is tailored for supernova and weak gravitational lensing observations, the resulting data supports a broad range of auxiliary science programs.

  14. Wide-Field Astronomical Surveys in the Next Decade

    SciTech Connect (OSTI)

    Strauss, Michael A.; /Princeton U.; Tyson, J.Anthony; /UC, Davis; Anderson, Scott F.; /Washington U., Seattle, Astron. Dept.; Axelrod, T.S.; /LSST Corp.; Becker, Andrew C.; /Washington U., Seattle, Astron. Dept.; Bickerton, Steven J.; /Princeton U.; Blanton, Michael R.; /New York U.; Burke, David L.; /SLAC; Condon, J.J.; /NRAO, Socorro; Connolly, A.J.; /Washington U., Seattle, Astron. Dept.; Cooray, Asantha R.; /UC, Irvine; Covey, Kevin R.; /Harvard U.; Csabai, Istvan; /Eotvos U.; Ferguson, Henry C.; /Baltimore, Space Telescope Sci.; Ivezic, Zeljko; /Washington U., Seattle, Astron. Dept.; Kantor, Jeffrey; /LSST Corp.; Kent, Stephen M.; /Fermilab; Knapp, G.R.; /Princeton U.; Myers, Steven T.; /NRAO, Socorro; Neilsen, Eric H., Jr.; /Fermilab; Nichol, Robert C.; /Portsmouth U., ICG /Harish-Chandra Res. Inst. /Caltech, IPAC /Potsdam, Max Planck Inst. /Harvard U. /Hawaii U. /UC, Berkeley, Astron. Dept. /Baltimore, Space Telescope Sci. /NOAO, Tucson /Carnegie Mellon U. /Chicago U., Astron. Astrophys. Ctr.

    2011-11-14

    Wide-angle surveys have been an engine for new discoveries throughout the modern history of astronomy, and have been among the most highly cited and scientifically productive observing facilities in recent years. This trend is likely to continue over the next decade, as many of the most important questions in astrophysics are best tackled with massive surveys, often in synergy with each other and in tandem with the more traditional observatories. We argue that these surveys are most productive and have the greatest impact when the data from the surveys are made public in a timely manner. The rise of the 'survey astronomer' is a substantial change in the demographics of our field; one of the most important challenges of the next decade is to find ways to recognize the intellectual contributions of those who work on the infrastructure of surveys (hardware, software, survey planning and operations, and databases/data distribution), and to make career paths to allow them to thrive.

  15. Wide-Field Astronomical Surveys in the Next Decade

    SciTech Connect (OSTI)

    Strauss, Michael A.; /Princeton U.; Tyson, J.Anthony; /UC, Davis; Anderson, Scott F.; /Washington U., Seattle, Astron. Dept.; Axelrod, T.S.; /LSST Corp.; Becker, Andrew C.; /Washington U., Seattle, Astron. Dept.; Bickerton, Steven J.; /Princeton U.; Blanton, Michael R.; /New York U.; Burke, David L.; /SLAC; Condon, J.J.; /NRAO, Socorro; Connolly, A.J.

    2009-03-01

    Wide-angle surveys have been an engine for new discoveries throughout the modern history of astronomy, and have been among the most highly cited and scientifically productive observing facilities in recent years. This trend is likely to continue over the next decade, as many of the most important questions in astrophysics are best tackled with massive surveys, often in synergy with each other and in tandem with the more traditional observatories. We argue that these surveys are most productive and have the greatest impact when the data from the surveys are made public in a timely manner. The rise of the 'survey astronomer' is a substantial change in the demographics of our field; one of the most important challenges of the next decade is to find ways to recognize the intellectual contributions of those who work on the infrastructure of surveys (hardware, software, survey planning and operations, and databases/data distribution), and to make career paths to allow them to thrive.

  16. The origin of wide-angle tailed radio galaxies

    E-Print Network [OSTI]

    Irini Sakelliou; Michael R. Merrifield

    1999-09-30

    To investigate the origins of wide-angle tailed radio sources (WATs), we have compiled a sample of these systems in Abell clusters for which X-ray data exist. Contrary to conventional wisdom, the WATs are found to be significantly displaced from the X-ray centroids of their host clusters. The bends in the WATs' radio jets are found to be oriented preferentially such that they point directly away from or toward the cluster centre, with more of the former than the latter. If this morphology is attributed to ram pressure, then the WATs are on primarily radial orbits, with more approaching the X-ray centroid than receding. There is also some evidence that the in-coming WATs are on average further from the X-ray centroid than the out-going ones. All of these observations strongly support a scenario in which WATs are created in cluster mergers.

  17. Sediment mixing and basin-wide cosmogenic nuclide analysis in rapidly-eroding mountainous environments

    E-Print Network [OSTI]

    1 Sediment mixing and basin-wide cosmogenic nuclide analysis in rapidly-eroding mountainous, W.M., Summerfield, M.A., and Fifield, L.K., 2006, Sediment mixing and basin-wide cosmogenic nuclide nuclide concentrations in alluvial sediments have been widely used to estimate basin-wide denudation rates

  18. Neutron multiplication error in TRU waste measurements

    SciTech Connect (OSTI)

    Veilleux, John [Los Alamos National Laboratory; Stanfield, Sean B [CCP; Wachter, Joe [CCP; Ceo, Bob [CCP

    2009-01-01

    Total Measurement Uncertainty (TMU) in neutron assays of transuranic waste (TRU) are comprised of several components including counting statistics, matrix and source distribution, calibration inaccuracy, background effects, and neutron multiplication error. While a minor component for low plutonium masses, neutron multiplication error is often the major contributor to the TMU for items containing more than 140 g of weapons grade plutonium. Neutron multiplication arises when neutrons from spontaneous fission and other nuclear events induce fissions in other fissile isotopes in the waste, thereby multiplying the overall coincidence neutron response in passive neutron measurements. Since passive neutron counters cannot differentiate between spontaneous and induced fission neutrons, multiplication can lead to positive bias in the measurements. Although neutron multiplication can only result in a positive bias, it has, for the purpose of mathematical simplicity, generally been treated as an error that can lead to either a positive or negative result in the TMU. While the factors that contribute to neutron multiplication include the total mass of fissile nuclides, the presence of moderating material in the matrix, the concentration and geometry of the fissile sources, and other factors; measurement uncertainty is generally determined as a function of the fissile mass in most TMU software calculations because this is the only quantity determined by the passive neutron measurement. Neutron multiplication error has a particularly pernicious consequence for TRU waste analysis because the measured Fissile Gram Equivalent (FGE) plus twice the TMU error must be less than 200 for TRU waste packaged in 55-gal drums and less than 325 for boxed waste. For this reason, large errors due to neutron multiplication can lead to increased rejections of TRU waste containers. This report will attempt to better define the error term due to neutron multiplication and arrive at values that are more realistic and accurate. To do so, measurements of standards and waste drums were performed with High Efficiency Neutron Counters (HENC) located at Los Alamos National Laboratory (LANL). The data were analyzed for multiplication effects and new estimates of the multiplication error were computed. A concluding section will present alternatives for reducing the number of rejections of TRU waste containers due to neutron multiplication error.

  19. A 2-Stage Genome-Wide Association Study to Identify Single Nucleotide Polymorphisms Associated With Development of Erectile Dysfunction Following Radiation Therapy for Prostate Cancer

    SciTech Connect (OSTI)

    Kerns, Sarah L.; Departments of Pathology and Genetics, Albert Einstein College of Medicine, Bronx, New York ; Stock, Richard; Stone, Nelson; Department of Urology, Mount Sinai School of Medicine, New York, New York ; Buckstein, Michael; Shao, Yongzhao; Campbell, Christopher; Rath, Lynda; De Ruysscher, Dirk; Lammering, Guido; Hixson, Rosetta; Cesaretti, Jamie; Terk, Mitchell; Ostrer, Harry; Rosenstein, Barry S.

    2013-01-01

    Purpose: To identify single nucleotide polymorphisms (SNPs) associated with development of erectile dysfunction (ED) among prostate cancer patients treated with radiation therapy. Methods and Materials: A 2-stage genome-wide association study was performed. Patients were split randomly into a stage I discovery cohort (132 cases, 103 controls) and a stage II replication cohort (128 cases, 102 controls). The discovery cohort was genotyped using Affymetrix 6.0 genome-wide arrays. The 940 top ranking SNPs selected from the discovery cohort were genotyped in the replication cohort using Illumina iSelect custom SNP arrays. Results: Twelve SNPs identified in the discovery cohort and validated in the replication cohort were associated with development of ED following radiation therapy (Fisher combined P values 2.1 Multiplication-Sign 10{sup -5} to 6.2 Multiplication-Sign 10{sup -4}). Notably, these 12 SNPs lie in or near genes involved in erectile function or other normal cellular functions (adhesion and signaling) rather than DNA damage repair. In a multivariable model including nongenetic risk factors, the odds ratios for these SNPs ranged from 1.6 to 5.6 in the pooled cohort. There was a striking relationship between the cumulative number of SNP risk alleles an individual possessed and ED status (Sommers' D P value = 1.7 Multiplication-Sign 10{sup -29}). A 1-allele increase in cumulative SNP score increased the odds for developing ED by a factor of 2.2 (P value = 2.1 Multiplication-Sign 10{sup -19}). The cumulative SNP score model had a sensitivity of 84% and specificity of 75% for prediction of developing ED at the radiation therapy planning stage. Conclusions: This genome-wide association study identified a set of SNPs that are associated with development of ED following radiation therapy. These candidate genetic predictors warrant more definitive validation in an independent cohort.

  20. Development of autonomous magnetometer rotorcraft for wide area assessment

    SciTech Connect (OSTI)

    Roelof Versteeg; Matt Anderson; Les Beard; Eric Corban; Darryl Curley; Jeff Gamey; Ross Johnson; Dwight Junkin; Mark McKay; Jared Salzmann; Mikhail Tchernychev; Suraj Unnikrishnan; Scott Vinson

    2010-04-01

    Large areas across the United States are potentially contaminated with UXO, with some ranges encompassing tens to hundreds of thousands of acres. Technologies are needed which will allow for cost effective wide area scanning with 1) near 100 % coverage and 2) near 100 % detection of subsurface ordnance or features indicative of subsurface ordnance. The current approach to wide area assessment is a multi-level one, in which medium - altitude fixed wing optical imaging is used for an initial site assessment. This assessment is followed with low altitude manned helicopter based magnetometry. Subsequent to this wide area assessment targeted surface investigations are performed using either towed geophysical sensor arrays or man portable sensors. In order to be an effective tool for small UXO detection, the sensing altitude for magnetic site investigations needs to be on the order of 1 – 3 meters. These altitude requirements mean that manned helicopter surveys will generally only be feasible in large, open and relatively flat terrains. While such surveys are effective in mapping large areas relatively fast there are substantial mobilization/demobilization, staffing and equipment costs associated with these surveys (resulting in costs of approximately $100-$150/acre). In addition, due to the low altitude there are substantial risks to pilots and equipment. Surface towed arrays provide high resolution maps but have other limitations, e.g. in their ability to navigate rough terrain effectively. There is thus a need for other systems which can be used for effective data collection. An UAV (Unmanned Aerial Vehicle) magnetometer platform is an obvious alternative. The motivation behind such a system is that it reduces risk to operators, is lower in initial and Operational and Maintenance (O&M) costs (and can thus potentially be applied to smaller sites) and has the potential of being more effective in terms of detection and possibly characterization (through the use of dynamic acquisition, i.e. survey mission inflight reprioritization). We describe and report on a one year effort with as primary goal to provide a recommendation to SERDP for a path forward in the implementation of one or more autonomous unmanned magnetometer rotorcraft platforms. This recommendation (which is provided in chapter 6) is based on the following three elements a) An assessment on the applicability of autonomous rotorcraft magnetometer systems to the current DoD site inventory, and an initial assessment of which type(s) of autonomous unmanned magnetometer rotorcraft platforms (in terms of performance characteristics such as payload, altitude, obstacle avoidance, production rate and flight time) would be most relevant to this inventory (chapter 3); b) An evaluation of the feasibility of assembling such platforms from commercial components (unmanned rotorcraft, control systems and sensors – both magnetometer sensors and supporting sensors). This evaluation included several highly successful field tests (chapter 4 and 5); c) A recommendation of the path forward, which includes a detailed outline of the efforts required in the design, assembly and testing of different modular platforms (chapter 6)

  1. An improved model for multiple effect distillation

    E-Print Network [OSTI]

    Mistry, Karan H.

    Increasing global demand for fresh water is driving research and development of advanced desalination technologies. As a result, a detailed model of multiple effect distillation (MED) is developed that is flexible, simple ...

  2. V-059: MoinMoin Multiple Vulnerabilities

    Broader source: Energy.gov [DOE]

    Multiple vulnerabilities have been reported in MoinMoin, which can be exploited by malicious users to conduct script insertion attacks and compromise a vulnerable system and by malicious people to manipulate certain data.

  3. Modular multiplication operator and quantized baker's maps

    SciTech Connect (OSTI)

    Lakshminarayan, Arul [Max-Planck-Institut fuer Physik komplexer Systeme, Noethnitzer Strasse 38, D-01187 Dresden (Germany)

    2007-10-15

    The modular multiplication operator, a central subroutine in Shor's factoring algorithm, is shown to be a coherent superposition of two quantum baker's maps when the multiplier is 2. The classical limit of the maps being completely chaotic, it is shown that there exist perturbations that push the modular multiplication operator into regimes of generic quantum chaos with spectral fluctuations that are those of random matrices. For the initial state of relevance to Shor's algorithm we study fidelity decay due to phase and bit-flip errors in a single qubit and show exponential decay with shoulders at multiples or half-multiples of the order. A simple model is used to gain some understanding of this behavior.

  4. Fair resource allocation in multiple access channels

    E-Print Network [OSTI]

    ParandehGheibi, Ali

    2008-01-01

    We consider the problem of resource allocation in a multiple access channel. Our objective is to obtain rate and power allocation policies that maximize a general concave utility function of average transmission rates over ...

  5. U-104: Adobe Flash Player Multiple Vulnerabilities

    Broader source: Energy.gov [DOE]

    Multiple vulnerabilities have been reported in Adobe Flash Player, which can be exploited by malicious people to conduct cross-site scripting attacks, bypass certain security restrictions, and compromise a user's system.

  6. Software Productivity Measurement Using Multiple Size Measures

    E-Print Network [OSTI]

    Bae, Doo-Hwan

    Software Productivity Measurement Using Multiple Size Measures Software Productivity MeasurementContents Introduction Background Related work Motivation Productivity measurement - Measurement model - Productivity measure construction - Productivity analysis Conclusion Discussion #12;Software Engineering Lab, KAIST 3

  7. The influence of ridge geometry at the ultraslow-spreading Southwest Indian Ridge (9?-25?E) : basalt composition sensitivity to variations in source and process

    E-Print Network [OSTI]

    Standish, Jared Jeffrey

    2006-01-01

    Between 90-25° E on the ultraslow-spreading Southwest Indian Ridge lie two sharply contrasting supersegments. One 630 km long supersegment erupts N-MORB that is progressively enriched in incompatible element concentrations ...

  8. Algorithms for Multiple Vehicle Routing Problems 

    E-Print Network [OSTI]

    Bae, Jung Yun

    2014-06-02

    require a collection of heterogeneous vehicles to visit a set of targets. This dissertation considers three fundamental rout- ing problems involving multiple vehicles that arise in these applications. The main objective of this dissertation is to develop... . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1.2 Approximation algorithm for MDMTHPP . . . . . . . . . . . 8 2.1.3 Optimal constrained forest as a two matroid intersection problem 11 2.2 Single depot multiple terminal Hamiltonian path problems . . . . . . 14 2.2.1 Problem statement...

  9. Multiple-time correlation functions for non-Markovian interaction: Beyond the Quantum Regression Theorem

    E-Print Network [OSTI]

    Daniel Alonso; Inés de Vega

    2004-09-16

    Multiple time correlation functions are found in the dynamical description of different phenomena. They encode and describe the fluctuations of the dynamical variables of a system. In this paper we formulate a theory of non-Markovian multiple-time correlation functions (MTCF) for a wide class of systems. We derive the dynamical equation of the {\\it reduced propagator}, an object that evolve state vectors of the system conditioned to the dynamics of its environment, which is not necessarily at the vacuum state at the initial time. Such reduced propagator is the essential piece to obtain multiple-time correlation functions. An average over the different environmental histories of the reduced propagator permits us to obtain the evolution equations of the multiple-time correlation functions. We also study the evolution of MTCF within the weak coupling limit and it is shown that the multiple-time correlation function of some observables satisfy the Quantum Regression Theorem (QRT), whereas other correlations do not. We set the conditions under which the correlations satisfy the QRT. We illustrate the theory in two different cases; first, solving an exact model for which the MTCF are explicitly given, and second, presenting the results of a numerical integration for a system coupled with a dissipative environment through a non-diagonal interaction.

  10. Browsing the World Wide Web from behind a firewall

    SciTech Connect (OSTI)

    Simons, R.W.

    1995-02-01

    The World Wide Web provides a unified method of access to various information services on the Internet via a variety of protocols. Mosaic and other browsers give users a graphical interface to the Web that is easier to use and more visually pleasing than any other common Internet information service today. The availability of information via the Web and the number of users accessing it have both grown rapidly in the last year. The interest and investment of commercial firms in this technology suggest that in the near future, access to the Web may become as necessary to doing business as a telephone. This is problematical for organizations that use firewalls to protect their internal networks from the Internet. Allowing all the protocols and types of information found in the Web to pass their firewall will certainly increase the risk of attack by hackers on the Internet. But not allowing access to the Web could be even more dangerous, as frustrated users of the internal network are either unable to do their jobs, or find creative new ways to get around the firewall. The solution to this dilemma adopted at Sandia National Laboratories is described. Discussion also covers risks of accessing the Web, design alternatives considered, and trade-offs used to find the proper balance between access and protection.

  11. Wide-Bandgap Compound Semiconductors to Enable Novel Semiconductor Devices

    SciTech Connect (OSTI)

    Crawford, M.H.; Chow, W.W.; Wright, A.F.; Lee, S.R.; Jones, E.D.; Han, J.; Shul, R.J.

    1999-04-01

    This report represents the completion of a three-year Laboratory-Directed Research and Development (LDRD) program that focused on research and development of GaN-based wide bandgap semiconductor materials (referred to as III-N materials). Our theoretical investigations include the determination of fundamental materials parameters from first-principles calculations, the study of gain properties of III-N heterostructures using a microscopic laser theory and density-functional-theory, charge-state calculations to determine the core structure and energy levels of dislocations in III-N materials. Our experimental investigations include time-resolved photoluminescence and magneto-luminescence studies of GaN epilayers and multiquantum well samples as well as x-ray diffraction studies of AlGaN ternary alloys. In addition, we performed a number of experiments to determine how various materials processing steps affect both the optical and electrical properties of GaN-based materials. These studies include photoluminescence studies of GaN epilayers after post-growth rapid thermal annealing, ion implantation to produce n- and p-type material and electrical and optical studies of plasma-etched structures.

  12. Energy efficiency study of single-wide manufactured homes

    SciTech Connect (OSTI)

    Yarbrough, D.W.; Andrews, G.J.; Stovall, T.K.; Kelly, T.

    1999-12-01

    This Cooperative Research and Development Agreement (CRADA) was among Tennessee Technological University, Clayton Homes, Inc., and Oak Ridge National Laboratory (ORNL). Manufactured homes now make up a substantial portion of the new home market, and improving the energy efficiency of these homes would save significant amounts of energy. This project explored the impact of differing levels of attic insulation, the use of evacuated insulation panels, and the application of a solar reflective roof coating. The performance of the installed roof cavity insulation compared favorably with that predicted by laboratory measurements. The more heavily insulated of the two units used about 30% less energy over the period of the project than the standard unit. Based on the experimental data, computer simulations for nine cities were completed for a single-wide manufactured home with the solar reflective roof coating. Annual electric power savings ranged from 894 kWh in Rapid City to 2119 kWh for the same roof area in Los Angeles. The field performance of vacuum insulation panels was compared with laboratory performance. The panels will perform as expected if protected from puncture.

  13. Wide range modeling study of dimethyl ether oxidation

    SciTech Connect (OSTI)

    Pitz, W.J.; Marinov, N.M.; Westbrook, C.K.; Dagaut, P.; Boettner, J-C; Cathonnet, M.

    1997-04-01

    A detailed chemical kinetic model has been used to study dimethyl ether (DME) oxidation over a wide range of conditions. Experimental results obtained in a jet-stirred reactor (JSR) at I and 10 atm, 0.2 < 0 < 2.5, and 800 < T < 1300 K were modeled, in addition to those generated in a shock tube at 13 and 40 bar, 0 = 1.0 and 650 :5 T :5 1300 K. The JSR results are particularly valuable as they include concentration profiles of reactants, intermediates and products pertinent to the oxidation of DME. These data test the Idnetic model severely, as it must be able to predict the correct distribution and concentrations of intermediate and final products formed in the oxidation process. Additionally, the shock tube results are very useful, as they were taken at low temperatures and at high pressures, and thus undergo negative temperature dependence (NTC) behavior. This behavior is characteristic of the oxidation of saturated hydrocarbon fuels, (e.g. the primary reference fuels, n-heptane and iso- octane) under similar conditions. The numerical model consists of 78 chemical species and 336 chemical reactions. The thermodynamic properties of unknown species pertaining to DME oxidation were calculated using THERM.

  14. Genetic associations with brain cortical thickness in multiple sclerosis

    E-Print Network [OSTI]

    2015-01-01

    relapse onset of multiple sclerosis. Brain 131, 808–817.Weinshenker, B.G. (2000) Multiple sclerosis. N Engl J Medcorrelations in multiple sclerosis: HLA genes in?uence

  15. Exploring Two Phases of Design-by-Analogy "Multiple Solutions" and "Multiple Analogies" 

    E-Print Network [OSTI]

    Gadwal, Apeksha

    2010-10-12

    the wire only. ? The kitchen utensil must be capable of containing the powdered substance and carrying the powdered substance 1 meter without losing the powdered substance. Create as many solutions as possible based on the analogy. Fig. 11... for a Gecko?s Foot example. As the structural consistency requirement and one-to?one constraint restrict the use of analogies to draw multiple solutions, this leads to the first research question: Can engineers draw multiple solutions (multiple...

  16. Wireless Relay Communication System for Multiple Small Robots

    E-Print Network [OSTI]

    Baumgartner, Jeremy Gordon

    2015-01-01

    Wireless Relay Communication System for Multiple SmallCRUZ WIRELESS RELAY COMMUNICATION SYSTEM FOR MULTIPLE SMALLa wire- less relay communication system is developed to test

  17. V-145: IBM Tivoli Federated Identity Manager Products Java Multiple...

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

    5: IBM Tivoli Federated Identity Manager Products Java Multiple Vulnerabilities V-145: IBM Tivoli Federated Identity Manager Products Java Multiple Vulnerabilities April 30, 2013 -...

  18. V-205: IBM Tivoli System Automation for Multiplatforms Java Multiple...

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

    5: IBM Tivoli System Automation for Multiplatforms Java Multiple Vulnerabilities V-205: IBM Tivoli System Automation for Multiplatforms Java Multiple Vulnerabilities July 29, 2013...

  19. V-161: IBM Maximo Asset Management Products Java Multiple Vulnerabilit...

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

    1: IBM Maximo Asset Management Products Java Multiple Vulnerabilities V-161: IBM Maximo Asset Management Products Java Multiple Vulnerabilities May 22, 2013 - 12:46am Addthis...

  20. AltaRock Energy Announces Successful Multiple-Zone Stimulation...

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

    created multiple stimulated zones from a single wellbore at the Newberry Enhanced Geothermal System (EGS) Demonstration site. Creating multiple stimulated zones from a single...

  1. Permeation of Multiple Isotopes in the Transition Between Surface...

    Office of Environmental Management (EM)

    Permeation of Multiple Isotopes in the Transition Between Surface- and Diffusion-Limited Regimes Permeation of Multiple Isotopes in the Transition Between Surface- and...

  2. ALS Capabilities Reveal Multiple Functions of Ebola Virus

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

    between multiple distinct structures provides multiple opportunities for antiviral drug design. Drugs that inhibit the ring, the dimer, or the hexameric filament structure, or...

  3. A wide angle tail radio galaxy in the COSMOS field: evidence for cluster formation

    E-Print Network [OSTI]

    V. Smolcic; E. Schinnerer; A. Finoguenov; I. Sakelliou; C. L. Carilli; C. S. Botzler; M. Brusa; N. Scoville; M. Ajiki; P. Capak; L. Guzzo; G. Hasinger; C. Impey; K. Jahnke; J. S. Kartaltepe; H. J. McCracken; B. Mobasher; T. Murayama; S. S. Sasaki; Y. Shioya; Y. Taniguchi; J. R. Trump

    2006-11-17

    We have identified a complex galaxy cluster system in the COSMOS field via a wide angle tail (WAT) radio galaxy consistent with the idea that WAT galaxies can be used as tracers of clusters. The WAT galaxy, CWAT-01, is coincident with an elliptical galaxy resolved in the HST-ACS image. Using the COSMOS multiwavelength data set, we derive the radio properties of CWAT-01 and use the optical and X-ray data to investigate its host environment. The cluster hosting CWAT-01 is part of a larger assembly consisting of a minimum of four X-ray luminous clusters within ~2 Mpc distance. We apply hydrodynamical models that combine ram pressure and buoyancy forces on CWAT-01. These models explain the shape of the radio jets only if the galaxy's velocity relative to the intra-cluster medium (ICM) is in the range of about 300-550 km/s which is higher than expected for brightest cluster galaxies (BCGs) in relaxed systems. This indicates that the CWAT-01 host cluster is not relaxed, but is possibly dynamically young. We argue that such a velocity could have been induced through subcluster merger within the CWAT-01 parent cluster and/or cluster-cluster interactions. Our results strongly indicate that we are witnessing the formation of a large cluster from an assembly of multiple clusters, consistent with the hierarchical scenario of structure formation. We estimate the total mass of the final cluster to be approximately 20% of the mass of the Coma cluster.

  4. Wide Field Hard X-ray Survey Telescope: ProtoEXIST1

    E-Print Network [OSTI]

    J. Hong; J. E. Grindlay; N. Chammas; B. Allen; A. Copete; B. Said; M. Burke; J. Howell; T. Gauron; R. G. Baker; S. D. Barthelmy; S. Sheikh; N. Gehrels; W. R. Cook; J. A. Burnham; F. A. Harrison; J. Collins; S. Labov; A. Garson III; H. Krawczynski

    2007-09-17

    We report our progress on the development of pixellated imaging CZT detector arrays for our first-generation balloon-borne wide-field hard X-ray (20 - 600 keV) telescope, ProtoEXIST1. Our ProtoEXIST program is a pathfinder for the High Energy Telescope (HET) on the Energetic X-ray Imaging Survey telescope (EXIST), a proposed implementation of the Black Hole Finder Probe. ProtoEXIST1 consists of four independent coded-aperture telescopes with close-tiled (~0.4 mm gaps) CZT detectors that preserve their 2.5mm pixel pitch. Multiple shielding/field-of-view configurations are planned to identify optimal geometry for the HET in EXIST. The primary technical challenge in ProtoEXIST is the development of large area, close-tiled modules of imaging CZT detectors (1000 cm2 for ProtoEXIST1), with all readout and control systems for the ASIC readout vertically stacked. We describe the overall telescope configuration of ProtoEXIST1 and review the current development status of the CZT detectors, from individual detector crystal units (DCUs) to a full detector module (DM). We have built the first units of each component for the detector plane and have completed a few Rev2 DCUs (2x2 cm2), which are under a series of tests. Bare DCUs (pre-crystal bonding) show high, uniform ASIC yield (~70%) and ~30% reduction in electronics noise compared to the Rev1 equivalent. A Rev1 DCU already achieved ~1.2% FWHM at 662 keV, and preliminary analysis of the initial radiation tests on a Rev2 DCU shows ~ 4 keV FWHM at 60 keV (vs. 4.7 keV for Rev1). We therefore expect about <~1% FWHM at 662 keV with the Rev2 detectors.

  5. Lower hybrid instability driven by mono-energy {alpha}-particles with finite pitch angle spread in a plasma

    SciTech Connect (OSTI)

    Kumar, Pawan; Singh, Vishwesh; Tripathi, V. K. [Department of Physics, IIT Delhi, New Delhi-110016 (India)

    2013-02-15

    A kinetic formalism of lower hybrid wave instability, driven by mono-energy {alpha}-particles with finite pitch angle spread, is developed. The instability arises through cyclotron resonance interaction with high cyclotron harmonics of {alpha}-particles. The {alpha}-particles produced in D-T fusion reactions have huge Larmor radii ({approx}10 cm) as compared to the wavelength of the lower hybrid wave, whereas their speed is an order of magnitude smaller than the speed of light in vacuum. As a result, large parallel phase velocity lower hybrid waves, suitable for current drive in tokamak, are driven unstable via coupling to high cyclotron harmonics. The growth rate decreases with increase in pitch angle spread of the beam. At typical electron density of {approx}10{sup 19} m{sup -3}, magnetic field {approx}4 Tesla and {alpha}-particle concentration {approx}0.1%, the large parallel phase velocity lower hybrid wave grows on the time scale of 20 ion cyclotron periods. The growth rate decreases with plasma density.

  6. Spreading of thermonuclear flames on the neutron star in SAX J1808.4-3658: an observational tool

    E-Print Network [OSTI]

    Sudip Bhattacharyya; Tod E. Strohmayer

    2006-04-03

    We analyse archival Rossi X-Ray Timing Explorer (RXTE) proportional counter array (PCA) data of thermonuclear X-ray bursts from the 2002 outburst of the accreting millisecond pulsar SAX J1808.4-3658. We present evidence of nonmonotonic variations of oscillation frequency during burst rise, and correlations among the time evolution of the oscillation frequency, amplitude, and the inferred burning region area. We also discuss that the amplitude and burning region area evolutions are consistent with thermonuclear flame spreading on the neutron star surface. Based on this discussion, we infer that for the 2002 Oct. 15 thermonuclear burst, the ignition likely occured in the mid-latitudes, the burning region took ~ 0.2 s to nearly encircle the equatorial region of the neutron star, and after that the lower amplitude oscillation originated from the remaining asymmetry of the burning front in the same hemisphere where the burst ignited. Our observational findings and theoretical discussion indicate that studies of the evolution of burst oscillation properties during burst rise can provide a powerful tool to understand thermonuclear flame spreading on neutron star surfaces under extreme physical conditions.

  7. Preliminary assessment of the ecological risks to wide-ranging wildlife species on the Oak Ridge Reservation. 1996 update

    SciTech Connect (OSTI)

    Sample, B.E.; Hinzman, R.L.; Jackson, B.L.; Baron, L.

    1996-09-01

    More than approximately 50 years of operations, storage, and disposal of wastes generated by the three facilities on the Oak Ridge Reservation (ORR) (the Oak Ridge K-25 Site, Oak Ridge National Laboratory, and the Oak Ridge Y-12 Plant) has resulted in a mosaic of uncontaminated property and lands that are contaminated to varying degrees. This contaminated property includes source areas and the terrestrial and aquatic habitats down gradient from these source areas. Although the integrator OUs generally contain considerable habitat for biota, the source OUs provide little or no suitable habitat. Historically, ecological risk assessment at Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) sites has focused on species that may be definitively associated with a contaminated area or source OU. Endpoints considered in source OUs include plants, soil/litter invertebrates and processes, aquatic biota found in on-OU sediments and surface waters, and small herbivorous, omnivorous, and vermivorous (i.e., feeding on ground, litter, or soil invertebrates) wildlife. All of these endpoints have limited spatial distributions or home ranges such that numerous individuals or a distinct population can be expected to reside within the boundaries of the source OU. Most analyses are not adequate for large sites with multiple, spatially separated contaminated areas such as the ORR that provide habitat for wide-ranging wildlife species. This report is a preliminary response to a plan for assessing risks to wide-ranging species.

  8. EIS-0309: Notice of Intent to Prepare a Site-Wide Environmental...

    Energy Savers [EERE]

    a Site-Wide Environmental Impact Statement Oak Ridge Y-12 Plant Pursuant to the National Environmental Policy Act (NEPA), DOE announces its intent to prepare a Site-Wide...

  9. EIS-0238: Notice of Intent to Prepare a Site-Wide Environmental...

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

    8: Notice of Intent to Prepare a Site-Wide Environmental Impact Statement EIS-0238: Notice of Intent to Prepare a Site-Wide Environmental Impact Statement Los Alamos National...

  10. 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...

  11. EA-1440-S1: Final Supplement to the Site-Wide Environmental Assessment...

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

    EA-1440-S1: Final Supplement to the Site-Wide Environmental Assessment EA-1440-S1: Final Supplement to the Site-Wide Environmental Assessment National Renewable Energy Laboratory's...

  12. Hanford’s Robust Safety Culture Gains One More Site-Wide Safety Standard

    Broader source: Energy.gov [DOE]

    RICHLAND, Wash. – The safety of the Hanford Site workforce has been bolstered with another program added to the list of Site-wide Safety Standards. The latest Site-wide Safety Standard covers Fall Protection.

  13. EIS-0426: DOE Notice of Availability of the Draft Site-Wide Environmen...

    Office of Environmental Management (EM)

    DOE Notice of Availability of the Draft Site-Wide Environmental Impact Statement and Notice of Public Hearings EIS-0426: DOE Notice of Availability of the Draft Site-Wide...

  14. New York State-wide Alternative Fuel Vehicle Program for Vehicles...

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

    New York State-wide Alternative Fuel Vehicle Program for Vehicles and Fueling Stations New York State-wide Alternative Fuel Vehicle Program for Vehicles and Fueling Stations 2011...

  15. KINETIC MODELING OF FUEL EFFECTS OVER A WIDE RANGE OF CHEMISTRY...

    Office of Scientific and Technical Information (OSTI)

    KINETIC MODELING OF FUEL EFFECTS OVER A WIDE RANGE OF CHEMISTRY, PROPERTIES, AND SOURCES Citation Details In-Document Search Title: KINETIC MODELING OF FUEL EFFECTS OVER A WIDE...

  16. Multislice brain myelin water fractions at 3T in multiple sclerosis

    E-Print Network [OSTI]

    Oh, Joonmi; Han, Eric T.; Lee, Michael C.; Nelson, Sarah J.; Pelletier, Daniel

    2007-01-01

    diagnostic criteria for multiple sclerosis: guidelines forimpairment in multiple sclerosis: an expanded disabilityimpairment in multiple sclerosis: an expanded disability

  17. Hybrid Pulsators -- Pulsating Stars with Multiple Identities

    E-Print Network [OSTI]

    Zhou, A -Y

    2015-01-01

    We have carried out a statistic survey on the pulsating variable stars with multiple identities. These stars were identified to exhibit two types of pulsation or multiple light variability types in the literature, and are usually called hybrid pulsators. We extracted the hybrid information based on the Simbad database. Actually, all the variables with multiple identities are retrieved. The survey covers various pulsating stars across the Hertzsprung-Russell diagram. We aim at giving a clue in selecting interesting targets for further observation. Hybrid pulsators are excellent targets for asteroseismology. An important implication of such stars is their potential in advancing the theories of both stellar evolution and pulsation. By presenting the statistics, we address the open questions and prospects regarding current status of hybrid pulsation studies.

  18. Enhancing video transmission in MANETs utilizing multiple interfaces and multiple channels per node

    E-Print Network [OSTI]

    Bouras, Christos

    . Simulation results indicate that the mechanism improves the networks capacity for video transmissionEnhancing video transmission in MANETs utilizing multiple interfaces and multiple channels per node}@cti.gr, gkamas@aeavellas.gr {politaki, tsanai}@ceid.upatras.gr Abstract. Mobile Ad hoc NETworks (MANETs

  19. Optimization for Fractional Cooperation in Multiple-Source Multiple-Relay Systems

    E-Print Network [OSTI]

    Adve, Raviraj

    . Chu Dept. of Electrical and Computer Engineering University of Toronto Toronto, Ontario, Canada Email Toronto, Ontario, Canada Email: aeckford@yorku.ca Raviraj S. Adve Dept. of Electrical and ComputerOptimization for Fractional Cooperation in Multiple-Source Multiple-Relay Systems Josephine P. K

  20. Net-X: System eXtensions for Supporting Multiple Channels, Multiple Interfaces,

    E-Print Network [OSTI]

    Vaidya, Nitin

    Net-X: System eXtensions for Supporting Multiple Channels, Multiple Interfaces, and Other Interface-- There are several interface capabilities that may be available in next generation wireless networks. Some examples of interface capabilities include the ability to set the channel of operation and data rate on a frequent basis

  1. World Wide Wood Network, Ltd. 2001-2002 Forest Products e-Commerce

    E-Print Network [OSTI]

    World Wide Wood Network, Ltd. © 2001-2002 Forest Products e-Commerce An Oxymoron or Wave of the Future Presented by: Thomas J. Westbrook, JD President & CEO World Wide Wood Network, Ltd. http Collapsing time and space Communication World Wide Wood Network, Ltd. © 2001-2002 The Promise of the Internet

  2. Long-Term Data Maintenance in Wide-Area Storage Systems: A Quantitative Approach

    E-Print Network [OSTI]

    Kubiatowicz, John D.

    Long-Term Data Maintenance in Wide-Area Storage Systems: A Quantitative Approach Hakim Weatherspoon-Term Data Maintenance in Wide-Area Storage Systems: A Quantitative Approach Hakim Weatherspoon, Byung data replication levels is a fundamental process of wide-area storage systems; replicas must be created

  3. Autonomous Network Management Using Cooperative Learning for Network-Wide Load

    E-Print Network [OSTI]

    Yoo, S. J. Ben

    Autonomous Network Management Using Cooperative Learning for Network-Wide Load Balancing-wide load balance, we propose Autonomous Network management with Team learning based Self shortest paths while uncongested longer paths may be underutilized. To maintain network-wide load balancing

  4. Charged-particle multiplicity at LHC energies

    ScienceCinema (OSTI)

    None

    2011-10-06

    The talk presents the measurement of the pseudorapidity density and the multiplicity distribution with ALICE at the achieved LHC energies of 0.9 and 2.36 TeV.An overview about multiplicity measurements prior to LHC is given and the related theoretical concepts are briefly discussed.The analysis procedure is presented and the systematic uncertainties are detailed. The applied acceptance corrections and the treatment of diffraction are discussed.The results are compared with model predictions. The validity of KNO scaling in restricted phase space regions is revisited. 

  5. RESEARCH Open Access Impaired multiple object tracking in children with

    E-Print Network [OSTI]

    Nguyen, Danh

    demands related to monitoring multiple targets reflecting a reduced acuity in spatiotemporal cognitive

  6. V-083: Oracle Java Multiple Vulnerabilities

    Broader source: Energy.gov [DOE]

    A Critical Patch Update is a collection of patches for multiple security vulnerabilities. The Critical Patch Update for Java SE also includes non-security fixes. Critical Patch Updates are cumulative and each advisory describes only the security fixes added since the previous Critical Patch Update and Security Alert.

  7. Semiconductor laser with multiple lasing wavelengths

    DOE Patents [OSTI]

    Fischer, Arthur J.; Choquette, Kent D.; Chow, Weng W.

    2003-07-29

    A new class of multi-terminal vertical-cavity semiconductor laser components has been developed. These multi-terminal laser components can be switched, either electrically or optically, between distinct lasing wavelengths, or can be made to lase simultaneously at multiple wavelengths.

  8. MAIN THEOREM OF COMPLEX MULTIPLICATION BRIAN CONRAD

    E-Print Network [OSTI]

    Conrad, Brian

    MAIN THEOREM OF COMPLEX MULTIPLICATION BRIAN CONRAD In [S, Ch. IV, §18] the Main Theorem of complex and abelian varieties. The aim of the Main Theorem is as follows. Let (A, i) be an abelian variety over Q Galois automorphisms. In these notes, we give a complete proof of the Main Theorem of complex

  9. Selectivity in multiple quantum nuclear magnetic resonance

    SciTech Connect (OSTI)

    Warren, W.S.

    1980-11-01

    The observation of multiple-quantum nuclear magnetic resonance transitions in isotropic or anisotropic liquids is shown to give readily interpretable information on molecular configurations, rates of motional processes, and intramolecular interactions. However, the observed intensity of high multiple-quantum transitions falls off dramatically as the number of coupled spins increases. The theory of multiple-quantum NMR is developed through the density matrix formalism, and exact intensities are derived for several cases (isotropic first-order systems and anisotropic systems with high symmetry) to shown that this intensity decrease is expected if standard multiple-quantum pulse sequences are used. New pulse sequences are developed which excite coherences and produce population inversions only between selected states, even though other transitions are simultaneously resonant. One type of selective excitation presented only allows molecules to absorb and emit photons in groups of n. Coherent averaging theory is extended to describe these selective sequences, and to design sequences which are selective to arbitrarily high order in the Magnus expansion. This theory and computer calculations both show that extremely good selectivity and large signal enhancements are possible.

  10. Steady water waves with multiple critical layers

    E-Print Network [OSTI]

    Mats Ehrnström; Joachim Escher; Erik Wahlén

    2011-04-01

    We construct small-amplitude periodic water waves with multiple critical layers. In addition to waves with arbitrarily many critical layers and a single crest in each period, two-dimensional sets of waves with several crests and troughs in each period are found. The setting is that of steady two-dimensional finite-depth gravity water waves with vorticity.

  11. ANALYSIS OF MINING EXPLOSION PERFORMANCE WITH MULTIPLE

    E-Print Network [OSTI]

    Stump, Brian W.

    ANALYSIS OF MINING EXPLOSION PERFORMANCE WITH MULTIPLE SENSOR DATA AND PHYSICAL MODELS Brian W Martin Thunder Basin Coal Company Wright, Wyoming #12;Analysis of Mining Explosion Performance 2 1 to Different Types of Mining Explosions · Single Shot · Cast Blast · Coal Fragmentation #12;Analysis of Mining

  12. MULTIPLE BUYING OR SELLING WITH VECTOR OFFERS

    E-Print Network [OSTI]

    Ferguson, Thomas S.

    MULTIPLE BUYING OR SELLING WITH VECTOR OFFERS F. THOMAS BRUSS , Universit´e Libre de Bruxelles of the house-selling problem to selling k houses. Let the offers, X1, X2, . . ., be independent, identically with recall of past offers and to problems with a discount. KEYWORDS: OPTIMAL STOPPING, HOUSE-SELLING, JOB

  13. SINGLE AND MULTIPLE ANTENNA COMMUNICATION SYSTEMS: PERFORMANCE

    E-Print Network [OSTI]

    Wehlau, David

    ), the Ontario Premier's Research Excellence Award (PREA), the Department of Electrical and Computer EngineeringSINGLE AND MULTIPLE ANTENNA COMMUNICATION SYSTEMS: PERFORMANCE ANALYSIS AND JOINT SOURCE-CHANNEL CODING by Firouz Behnamfar A thesis submitted to the Department of Electrical and Computer Engineering

  14. PET image reconstruction with system matrix based on point spread function derived from single photon incidence response

    E-Print Network [OSTI]

    Xin, Fan; Ming-Kai, Yun; Xiao-Li, Sun; Xue-Xiang, Cao; Shuang-Quanm, Liu; Pei, Chai; Dao-Wu, Li; Long, Wei

    2014-01-01

    In positron emission tomography (PET) imaging, statistical iterative reconstruction (IR) techniques appear particularly promising since they can provide accurate physical model and geometric system description. The reconstructed image quality mainly depends on the system matrix model which describes the relationship between image space and projection space for the IR method. The system matrix can contain some physics factors of detection such as geometrical component and blurring component. Point spread function (PSF) is generally used to describe the blurring component. This paper proposes an IR method based on the PSF system matrix, which is derived from the single photon incidence response function. More specifically, the gamma photon incidence on a crystal array is simulated by the Monte Carlo (MC) simulation, and then the single photon incidence response functions are obtained. Subsequently, using the single photon incidence response functions, the coincidence blurring factor is acquired according to the...

  15. Certification of Plutonium Standards for KAMS Neutron Multiplicity Counter

    SciTech Connect (OSTI)

    Salaymeh, S.R.

    2002-05-31

    As part of the implementation of the PEIS record of decision in January of 1997, DOE will pursue two technologies to disposition fifty metric tons of its stockpile of plutonium. As a result of this and in order to expedite the closure of Rocky Flats Environmental Technology Site in Colorado, DOE decided to use existing facilities at the Savannah River Site (SRS) for storing all material containing plutonium at KAMS. A neutron multiplicity counter was designed and built to carry out receipt verification measurement at the facility. Since the material covers a wide range and different levels of impurities, it is essential that we obtain a set of working standards. An agreement was drafted to select the first drums to be these standards. A plan was developed for the certification of these standards using Rocky Flat's existing nondestructive assay equipment. This paper will discuss the types of materials to be shipped to SRS, number of standards to certify for each type of material, and the certification plan. It will also discuss the activities necessary to determine the nuclear content of these working standards to be used at SRS facilities in support of shipment and receipt of the Pu containing materials. Definition of instrument qualifications, measurement control processes, measurement methodologies, and calculations necessary to report the gram quantities and their uncertainties for plutonium, americium-241, uranium-235 (if present) and neptunium-237 (if present) will also be presented.

  16. Generation of Low Absolute Energy Spread Electron Beams in Laser Wakefield Acceleration Using Tightly Focused Laser through Near-Ionization-Threshold Injection

    E-Print Network [OSTI]

    Li, F; Wan, Y; Wu, Y P; Hua, J F; Pai, C H; Lu, W; Mori, W B; Joshi, C

    2015-01-01

    An enhanced ionization injection scheme using a tightly focused laser pulse with intensity near the ionization potential to trigger the injection process in a mismatched pre-plasma channel has been proposed and examined via multi-dimensional particle-in-cell simulations. The core idea of the proposed scheme is to lower the energy spread of trapped beams by shortening the injection distance. We have established theory to precisely predict the injection distance, as well as the ionization degree of injection atoms/ions, electron yield and ionized charge. We have found relation between injection distance and laser and plasma parameters, giving a strategy to control injection distance hence optimizing beam's energy spread. In the presented simulation example, we have investigated the whole injection and acceleration in detail and found some unique features of the injection scheme, like multi-bunch injection, unique longitudinal phase-space distribution, etc. Ultimate electron beam has a relative energy spread (rm...

  17. Implications of Wide-Area Geographic Diversity for Short- Term Variability of Solar Power

    E-Print Network [OSTI]

    Mills, Andrew

    2010-01-01

    Term power ?uctuation of wind turbines: Analyzing data frome?ects of distributed wind turbines. part 1. coherence andto utilities by multiple wind turbines. IEEE Transactions on

  18. Intravalley Multiple Scattering of Quasiparticles in Graphene

    E-Print Network [OSTI]

    J. Y. Vaishnav; Justin Q. Anderson; Jamie D. Walls

    2011-05-28

    We develop a theoretical description of intravalley scattering of quasiparticles in graphene from multiple short-range scatterers of size much greater than the carbon-carbon bond length. Our theory provides a method to rapidly calculate the Green's function in graphene for arbitrary configurations of scatterers. We demonstrate that non-collinear multiple scattering trajectories generate pseudospin rotations that alter quasiparticle interference, resulting in significant modifications to the shape, intensity, and pattern of the interference fringes in the local density of states (LDOS). We illustrate these effects via theoretical calculations of the LDOS for a variety of scattering configurations in single layer graphene. A clear understanding of impurity scattering in graphene is a step towards exploiting graphene's unique properties to build future devices.

  19. Multiple Scattering Measurements in the MICE Experiment

    SciTech Connect (OSTI)

    Carlisle, T.; Cobb, J.; Neuffer, D.; /Fermilab

    2012-05-01

    The international Muon Ionization Cooling Experiment (MICE), under construction at RAL, will test a prototype cooling channel for a future Neutrino Factory or Muon Collider. The cooling channel aims to achieve, using liquid hydrogen absorbers, a 10% reduction in transverse emittance. The change in 4D emittance will be determined with an accuracy of 1% by measuring muons individually. Step IV of MICE will make the first precise emittance-reduction measurements of the experiment. Simulation studies using G4MICE, based on GEANT4, find a significant difference in multiple scattering in low Z materials, compared with the standard expression quoted by the Particle Data Group. Direct measurement of multiple scattering using the scintillating-fibre trackers is found to be possible, but requires the measurement resolution to be unfolded from the data.

  20. Multiple quadrature by Monte Carlo techniques 

    E-Print Network [OSTI]

    Voss, John Dietrich

    1966-01-01

    of a multiple integral ordinarily hopeless to attempt by 1 classical methods. " In this paper the Monte Carlo Method of numerical quadrature is used to integrate some functions that are extremely difficult and tedious to integrate by any other known... and the table of known values can be extended. The method developed here may also be used to evaluate the distribution at any desired values of the parameters . C HAP TER II THEORETICAL CONSIDERATIONS Hammersley has said: "Every Monte Carlo computation...

  1. Lamp method and apparatus using multiple reflections

    DOE Patents [OSTI]

    MacLennan, Donald A. (Butler, PA); Turner, Brian (Damascus, MD); Kipling, Kent (Gaithersburg, MD)

    1999-01-01

    A method wherein the light in a sulfur or selenium lamp is reflected through the fill a multiplicity of times to convert ultraviolet radiation to visible. A light emitting device comprised of an electrodeless envelope which bears a light reflecting covering around a first portion which does not crack due to differential thermal expansion and which has a second portion which comprises a light transmissive aperture.

  2. Lamp method and apparatus using multiple reflections

    DOE Patents [OSTI]

    MacLennan, D.A.; Turner, B.; Kipling, K.

    1999-05-11

    A method wherein the light in a sulfur or selenium lamp is reflected through the fill a multiplicity of times to convert ultraviolet radiation to visible is disclosed. A light emitting device comprised of an electrodeless envelope which bears a light reflecting covering around a first portion which does not crack due to differential thermal expansion and which has a second portion which comprises a light transmissive aperture. 20 figs.

  3. MCNP6 Fission Multiplicity with FMULT Card

    SciTech Connect (OSTI)

    Wilcox, Trevor; Fensin, Michael Lorne; Hendricks, John S.; James, Michael R.; McKinney, Gregg W.

    2012-06-18

    With the merger of MCNPX and MCNP5 into MCNP6, MCNP6 now provides all the capabilities of both codes allowing the user to access all the fission multiplicity data sets. Detailed in this paper is: (1) the new FMULT card capabilities for accessing these different data sets; (2) benchmark calculations, as compared to experiment, detailing the results of selecting these separate data sets for thermal neutron induced fission on U-235.

  4. Benchmarking of multiple preequilibrium routines in GNASH

    SciTech Connect (OSTI)

    Chadwick, M.B.; Young, P.G.

    1994-08-01

    The authors compare two different models for multiple preequilibrium emission (MPE) in GNASH: the older exciton MPE model; and a new generalized MPE model which is parameter-free. They analyze the proton-induced reactions on zirconium and lead, which were the focus of a recent NEA intermediate-energy code intercomparison, using both the MPE models. They find that the new generalized MPE model better describes the measurements.

  5. MPACT Fast Neutron Multiplicity System Prototype Development

    SciTech Connect (OSTI)

    D.L. Chichester; S.A. Pozzi; J.L. Dolan; M.T. Kinlaw; S.J. Thompson; A.C. Kaplan; M. Flaska; A. Enqvist; J.T. Johnson; S.M. Watson

    2013-09-01

    This document serves as both an FY2103 End-of-Year and End-of-Project report on efforts that resulted in the design of a prototype fast neutron multiplicity counter leveraged upon the findings of previous project efforts. The prototype design includes 32 liquid scintillator detectors with cubic volumes 7.62 cm in dimension configured into 4 stacked rings of 8 detectors. Detector signal collection for the system is handled with a pair of Struck Innovative Systeme 16-channel digitizers controlled by in-house developed software with built-in multiplicity analysis algorithms. Initial testing and familiarization of the currently obtained prototype components is underway, however full prototype construction is required for further optimization. Monte Carlo models of the prototype system were performed to estimate die-away and efficiency values. Analysis of these models resulted in the development of a software package capable of determining the effects of nearest-neighbor rejection methods for elimination of detector cross talk. A parameter study was performed using previously developed analytical methods for the estimation of assay mass variance for use as a figure-of-merit for system performance. A software package was developed to automate these calculations and ensure accuracy. The results of the parameter study show that the prototype fast neutron multiplicity counter design is very nearly optimized under the restraints of the parameter space.

  6. Multiple-reflection optical gas cell

    DOE Patents [OSTI]

    Matthews, Thomas G. (Oak Ridge, TN)

    1983-01-01

    A multiple-reflection optical cell for Raman or fluorescence gas analysis consists of two spherical mirrors positioned transverse to a multiple-pass laser cell in a confronting plane-parallel alignment. The two mirrors are of equal diameter but possess different radii of curvature. The spacing between the mirrors is uniform and less than half of the radius of curvature of either mirror. The mirror of greater curvature possesses a small circular portal in its center which is the effective point source for conventional F1 double lens collection optics of a monochromator-detection system. Gas to be analyzed is flowed into the cell and irradiated by a multiply-reflected composite laser beam centered between the mirrors of the cell. Raman or fluorescence radiation originating from a large volume within the cell is (1) collected via multiple reflections with the cell mirrors, (2) partially collimated and (3) directed through the cell portal in a geometric array compatible with F1 collection optics.

  7. Constant-mesh, multiple-shaft transmission

    SciTech Connect (OSTI)

    Rea, J.E.; Mills, D.D.; Sewell, J.S.

    1992-04-21

    This patent describes a multiple-shaft, constant-mesh transmission adapted to establish selectively a reverse torque delivery path and a forward drive torque delivery path and having a torque input means including a torque input shaft, a mainshaft aligned with the input shaft, a countershaft geared to the input shaft in spaced, parallel relationship with respect to the mainshaft, a torque output shaft joined to the mainshaft; multiple mainshaft gear elements journalled on the main airshaft, multiple cluster gear elements carried by the countershaft in meshing engagement with the mainshaft gear elements, one of the cluster gear elements being rotatably journalled on the countershaft; a reverse idle gear, a reverse gear journalled on the countershaft, the reverse idler gear being in constant mesh with the reverse gear and one of the mainshaft gear elements; first clutch means for connecting selectively the reverse gear and the countershaft; second synchronizer clutch means for connecting selectively the one of the mainshaft gear elements to the mainshaft; and third synchronizer clutch means for selectively connecting another of the mainshaft gear elements to the mainshaft; the first clutch means being a double-acting clutch with a first common axially movable clutch element adapted upon movement in one axial direction to drivably connected the reverse gear to the countershaft and adapted upon movement in the opposite axial direction to connect the one cluster gear element to the countershaft.

  8. Radial velocities of southern visual multiple stars

    SciTech Connect (OSTI)

    Tokovinin, Andrei; Pribulla, Theodor; Fischer, Debra E-mail: pribulla@ta3.sk

    2015-01-01

    High-resolution spectra of visual multiple stars were taken in 2008–2009 to detect or confirm spectroscopic subsystems and to determine their orbits. Radial velocities of 93 late-type stars belonging to visual multiple systems were measured by numerical cross-correlation. We provide the individual velocities, the width, and the amplitude of the Gaussians that approximate the correlations. The new information on the multiple systems resulting from these data is discussed. We discovered double-lined binaries in HD 41742B, HD 56593C, and HD 122613AB, confirmed several other known subsystems, and constrained the existence of subsystems in some visual binaries where both components turned out to have similar velocities. The orbits of double-lined subsystems with periods of 148 and 13 days are computed for HD 104471 Aa,Ab and HD 210349 Aa,Ab, respectively. We estimate individual magnitudes and masses of the components in these triple systems and update the outer orbit of HD 104471 AB.

  9. EIS-0380: DOE Notice of Availability of the Draft Site-Wide Environmen...

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

    Statement Continued Operation of Los Alamos National Laboratory, Los Alamos, New Mexico NNSA announces the availability of the Draft Site-wide Environmental Impact Statement...

  10. EIS-0281: Notice of Intent to Prepare a Site-Wide Environmental...

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

    Laboratories, Albuquerque, New Mexico The Department of Energy (DOE) announces its intent to prepare a Site-Wide Environmental Impact Statement (SWEIS) for its Sandia National...

  11. Ray tracing flux calculation for the small and wide angle x-ray...

    Office of Scientific and Technical Information (OSTI)

    station at the SESAME synchrotron radiation facility The calculation for the optics of the synchrotron radiation small and wide angle x-ray scattering beamline, currently...

  12. Plant-Wide Waste Management. 1. Synthesis and Multiobjective Aninda Chakraborty and Andreas A. Linninger*

    E-Print Network [OSTI]

    Linninger, Andreas A.

    Plant-Wide Waste Management. 1. Synthesis and Multiobjective Design Aninda Chakraborty and Andreas. The discussion includes case studies illustrating the systematic and fully automatic waste management procedure

  13. EIS-0387: DOE Notice of Availability of the Draft Site-Wide Environmen...

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

    a separately-organized agency within the Department of Energy (DOE), announces the availability of the Draft Site-Wide Environmental Impact Statement for the Y-12 National...

  14. EA-0387: DOE Notice of Availability of the Final Site-Wide Environment...

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

    a semi-autonomous agency within the Department of Energy (DOE), announces the availability of the Final Site-Wide Environmental Impact Statement for the Y-12 National...

  15. Multiple laser pulse ignition method and apparatus

    DOE Patents [OSTI]

    Early, J.W.

    1998-05-26

    Two or more laser light pulses with certain differing temporal lengths and peak pulse powers can be employed sequentially to regulate the rate and duration of laser energy delivery to fuel mixtures, thereby improving fuel ignition performance over a wide range of fuel parameters such as fuel/oxidizer ratios, fuel droplet size, number density and velocity within a fuel aerosol, and initial fuel temperatures. 18 figs.

  16. Formation and spread of callus tissue and tangential rows of resin ducts in Larix decidua and Picea abies following rockfall impacts

    E-Print Network [OSTI]

    Butler, David R. - Department of Geography, Texas State University

    Formation and spread of callus tissue and tangential rows of resin ducts in Larix decidua and Picea After mechanical wounding, callus tissue and tangential rows of traumatic resin ducts (TRDs) are formed extension, traumatic resin ducts. Introduction Rockfall is a common mass movement process in alpine

  17. Study concerning the utilization of the ocean spreading center environment for the conversion of biomass to a liquid fuel. (Includes Appendix A: hydrothermal petroleum genesis). [Supercritical water

    SciTech Connect (OSTI)

    Steverson, M.; Stormberg, G.

    1985-01-01

    This document contains a report on the feasibility of utilizing energy obtained from ocean spreading centers as process heat for the conversion of municipal solid wastes to liquid fuels. The appendix contains a paper describing hydrothermal petroleum genesis. Both have been indexed separately for inclusion in the Energy Data Base. (DMC)

  18. Abundance and spread of the invasive red algae, Kappaphycus spp., in Kane'ohe Bay, Hawai'i and an experimental assessment of management

    E-Print Network [OSTI]

    Smith, Jennifer E.

    ) investigate control options including manual removal and the use of biocontrol agents. Kappaphycus spp-808-236-7443) Received 7 July 2003; accepted in revised form 29 April 2004 Key words: algal blooms, biocontrol be a useful bio- control agent. Because Kappaphycus spp. are still spreading in Kane'ohe Bay and can overgrow

  19. Patterns and pathways in the post-establishment spread of non-indigenous aquatic species: the slowing invasion of North American inland lakes

    E-Print Network [OSTI]

    Kraft, Clifford E.

    Patterns and pathways in the post-establishment spread of non-indigenous aquatic species, but the location of the initial founding population, the mechanisms and pathways of dispersal, and the distribution' over an inhospitable terrestrial environment. Hydrological connections are not always benign passages

  20. -Spreading of the invaSive CarpobrotuS aff. acinaciformis in Mediterranean eCoSySteMS -45 Applied Vegetation Science 11: 45-54, 2008

    E-Print Network [OSTI]

    Traveset, Anna

    two years (2002-2003) , comparing two habitats (rocky coast vs. coastal dune) and two different light Vegetation Science 11: 45-54, 2008 doi: 10.3170/2007-7-18303, published online 20 November 2007 © IAVS colo- nization of heterogeneous coastal Mediterranean environments spreading well beyond the open sand