National Library of Energy BETA

Sample records for observing system aos

  1. Aerosol Observing System (AOS) Handbook

    SciTech Connect (OSTI)

    Jefferson, A

    2011-01-17

    The Aerosol Observing System (AOS) is a suite of in situ surface measurements of aerosol optical and cloud-forming properties. The instruments measure aerosol properties that influence the earth’s radiative balance. The primary optical measurements are those of the aerosol scattering and absorption coefficients as a function of particle size and radiation wavelength and cloud condensation nuclei (CCN) measurements as a function of percent supersaturation. Additional measurements include those of the particle number concentration and scattering hygroscopic growth. Aerosol optical measurements are useful for calculating parameters used in radiative forcing calculations such as the aerosol single-scattering albedo, asymmetry parameter, mass scattering efficiency, and hygroscopic growth. CCN measurements are important in cloud microphysical models to predict droplet formation.

  2. AEROSOL OBSERVING SYSTEMS (AOS): NEW CAPABILITIES FOR ASR RESEARCHERS

    E-Print Network [OSTI]

    National Laboratory U.S. Department of Energy Office of Science ABSTRACT Three new AOS units, including.S. Department of Energy. The publisher by accepting the manuscript for publication acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish

  3. Aerosol Observing Systems (AOS), New Capabilities for ASR Researchers Stephen R. Springston (srs@bnl.gov)

    E-Print Network [OSTI]

    Gases PTRMS Carbon Monoxide Ozone Ozone Ozone Sulfur Dioxide Speciated Odd Nitrogen (NO, NO NO ) o Lab of remote access over the internet allows mentors complete control over AOS infrastructure components/off all subsystems allowing both remote and autonomous restart and shutdown of unit in graded steps o

  4. Air Observe System

    E-Print Network [OSTI]

    Alexander Bolonkin

    2007-01-10

    This manuscript contains a description and basic principles for observing inaccessible areas using low cost, easily deployed equipment. The basic premise is to suspend a tiny video camera at an altitude of 10 - 200 meters over the area to be surveyed. The TV camera supports at altitude by wind or balloon. The technical challenges regard the means by which the camera is suspended. Such a system may be used by military or police forces or by civil authorities for rescue missions or assessment of natural disasters. The method may be further developed for military applications by integrating the surveillance task with deployment of munitions. Key words: air observer, air suspended system, low altitude video observer.

  5. Observability of complex systems

    E-Print Network [OSTI]

    Liu, Yang-Yu

    A quantitative description of a complex system is inherently limited by our ability to estimate the system’s internal state from experimentally accessible outputs. Although the simultaneous measurement of all internal ...

  6. Design considerations of the AO module for the Gemini South multi-conjugate adaptive optics system

    E-Print Network [OSTI]

    Design considerations of the AO module for the Gemini South multi-conjugate adaptive optics system Observatory, 670 N. A'ohoku Place, Hilo, HI 96720 B. Optical Design Service, 8 S. Bella Vista Drive, Tucson optics system E. Jamesa , C. Boyera , R. A. Buchroederb , B.L. Ellerbroeka , M. Huntena a Gemini

  7. Performance of a MEMS-based AO-OCT system using Fourier Reconstruction

    SciTech Connect (OSTI)

    Evans, J; Zawadzki, R; Jones, S; Olivier, S; Werner, J S

    2009-01-21

    Adaptive optics (AO) and optical coherence tomography (OCT) are powerful imaging modalities that, when combined, can provide high-resolution (3.5 {micro}m isotropic), 3-D images of the retina. The AO-OCT system at UC Davis has demonstrated the utility of this technology for microscopic, volumetric, in vivo retinal imaging. The current system uses an AOptix bimorph deformable mirror (DM) for low-order, high-stroke correction and a 140-actuator Boston Micromachines DM for high-order correction. Developments to improve performance or functionality of the instrument are on-going. Based on previous work in system characterization we have focused on improved AO control. We present preliminary results and remaining challenges for a newly implemented Fourier transform reconstructor (FTR). The previously reported error budget analysis is also reviewed and updated, with consideration of how to improve both the amount of residual error and the robustness of the system. Careful characterization of the AO system will lead to improved performance and inform the design of future systems.

  8. Meridional variation in tropospheric methane on Titan observed with AO spectroscopy at Keck and VLT

    E-Print Network [OSTI]

    Ádámkovics, Máté; Hayes, Alexander G; Rojo, Patricio M; Corlies, Paul; Barnes, Jason W; Ivanov, Valentin D; Brown, Robert H; Baines, Kevin H; Buratti, Bonnie J; Clark, Roger N; Nicholson, Philip D; Sotin, Christophe

    2015-01-01

    The spatial distribution of the tropospheric methane on Titan was measured using near-infrared spectroscopy. Ground-based observations at 1.5$\\mu{\\rm m}$ (H-band) were performed during the same night using instruments with adaptive optics at both the W. M. Keck Observatory and at the Paranal Observatory on 17 July 2014 UT. The integral field observations with SINFONI on the VLT covered the entire H-band at moderate resolving power, $R=\\lambda/\\Delta\\lambda\\approx1,500$, while the Keck observations were performed with NIRSPAO near 1.55254$\\mu{\\rm m}$ at higher resolution, $R\\approx25,000$. The moderate resolution observations are used for flux calibration and for the determination of model parameters that can be degenerate in the interpretation of high resolution spectra. Line-by-line calculations of CH$_4$ and CH$_3$D correlated $k$ distributions from the HITRAN 2012 database were used, which incorporate revised line assignments near 1.5$\\mu{\\rm m}$. We fit the surface albedo and aerosol distributions in the ...

  9. Methanol Masers Observations in the 3-mm Bandwidth at the Radio Telescope RT-22 CrAO

    E-Print Network [OSTI]

    S. Yu. Zubrin; A. V. Antyufeyev; V. V. Myshenko; V. M. Shulga

    2007-12-10

    We report the beginning of the astronomical masers investigations in the 3-mm bandwidth at the radio telescope RT-22 (CrAO, Ukraine). For this purpose the special complex for maser lines investigation in 85...115 GHz frequency band is developed. It is made on the base of the low noise cryogenic Shottky-diode receiver and the high resolution Fourier-spectrometer. The cryogenic receiver has the DSB noise temperature less than 100K. The spectral channel separation of the Fourier-spectrometer is about 4kHz and the spectrometer bandwidth is 8 MHz. Results of maser observations of 8$^{0}-7^{1} $A$^{+}$ transition of methanol (95.169 GHz) towards DR-21(OH), DR-21W and NGC7538 are in good agreement with early obtained results by other authors. On the basis of the analysis of the location of masers in the NGC7538 direction we can assume that the origin of all known class I methanol masers in this region is connected with existing molecular outflows from young stars.

  10. Magellan Adaptive Optics first-light observations of the exoplanet beta Pic b. II. 3-5 micron direct imaging with MagAO+Clio, and the empirical bolometric luminosity of a self-luminous giant planet

    E-Print Network [OSTI]

    Morzinski, Katie M; Skemer, Andy J; Close, Laird M; Hinz, Phil M; Rodigas, T J; Puglisi, Alfio; Esposito, Simone; Riccardi, Armando; Pinna, Enrico; Xompero, Marco; Briguglio, Runa; Bailey, Vanessa P; Follette, Katherine B; Kopon, Derek; Weinberger, Alycia J; Wu, Ya-Lin

    2015-01-01

    Young giant exoplanets are a unique laboratory for understanding cool, low-gravity atmospheres. A quintessential example is the massive extrasolar planet $\\beta$ Pic b, which is 9 AU from and embedded in the debris disk of the young nearby A6V star $\\beta$ Pictoris. We observed the system with first light of the Magellan Adaptive Optics (MagAO) system. In Paper I we presented the first CCD detection of this planet with MagAO+VisAO. Here we present four MagAO+Clio images of $\\beta$ Pic b at 3.1 $\\mu$m, 3.3 $\\mu$m, $L^\\prime$, and $M^\\prime$, including the first observation in the fundamental CH$_4$ band. To remove systematic errors from the spectral energy distribution (SED), we re-calibrate the literature photometry and combine it with our own data, for a total of 22 independent measurements at 16 passbands from 0.99--4.8 $\\mu$m. Atmosphere models demonstrate the planet is cloudy but are degenerate in effective temperature and radius. The measured SED now covers $>$80\\% of the planet's energy, so we approach ...

  11. Observability and Computability in Physical Systems

    E-Print Network [OSTI]

    Subhash Kak

    2012-06-26

    This paper considers the relevance of the concepts of observability and computability in physical theory. Observability is related to verifiability which is essential for effective computing and as physical systems are computational systems it is important even where explicit computation is not the goal. Specifically, we examine two problems: observability and computability for quantum computing, and remote measurement of time and frequency.

  12. A SURVEY OF RECENT RESULTS IN NETWORKED CONTROL SYSTEMS Jo~ao P. Hespanha Payam Naghshtabrizi Yonggang Xu

    E-Print Network [OSTI]

    Liebling, Michael

    -purpose shared network to connect spatially distributed elements results in flexible architectures and generally-endurance energy-limited systems such as sensor networks, underwater vehicles, and large arrays of micro1 A SURVEY OF RECENT RESULTS IN NETWORKED CONTROL SYSTEMS Jo~ao P. Hespanha Payam Naghshtabrizi

  13. NOS Integrated Ocean Observations Systems (IOOS)

    E-Print Network [OSTI]

    Observing Assets After Hurricane Sandy NOAA Award No. NA14NOS4830003 Report 05: 31 December 2014 Prepared Ocean Observing System when Hurricane Sandy passed through the region in October 2012. The objective lost during Sandy. The benefits of this work will increase the coverage and data quality of the surface

  14. NOS Integrated Ocean Observations Systems (IOOS)

    E-Print Network [OSTI]

    Observing Assets After Hurricane Sandy NOAA Award No. NA14NOS4830003 Report 04: 30 September 2014 Prepared Ocean Observing System when Hurricane Sandy passed through the region in October 2012. The objective lost during Sandy. The benefits of this work will increase the coverage and data quality of the surface

  15. NOS Integrated Ocean Observations Systems (IOOS)

    E-Print Network [OSTI]

    Observing Assets After Hurricane Sandy NOAA Award No. NA14NOS4830003 30 January 2014 Prepared for: NOAA IOOS Association Coastal Ocean Observing System when Hurricane Sandy passed through the region in October 2012 and ADCP assets lost during Sandy. The benefits of this work will increase the coverage and data quality

  16. NOS Integrated Ocean Observations Systems (IOOS)

    E-Print Network [OSTI]

    Observing Assets After Hurricane Sandy NOAA Award No. NA14NOS4830003 Report 01: 30 April 2014 Prepared for Ocean Observing System when Hurricane Sandy passed through the region in October 2012. The objective lost during Sandy. The benefits of this work will increase the coverage and data quality of the surface

  17. GEO Secretariat Global Earth Observing System of

    E-Print Network [OSTI]

    and Epidemiology 3. Energy Management 4. Climate Variability & Change 5. Water Management 6. Weather Forecasting 7© GEO Secretariat Global Earth Observing System of Systems (GEOSS): Biodiversity, Ecosystems and GEO BON GEO Forest Monitoring Symposium 4 November 2008 Douglas M. Muchoney, Ph.D. U.S. Geological

  18. The web-PLOP observation prioritisation system

    E-Print Network [OSTI]

    Colin Snodgrass; Yiannis Tsapras; Rachel Street; Daniel Bramich; Keith Horne; Martin Dominik; Alasdair Allan

    2008-05-14

    We present a description of the automated system used by RoboNet to prioritise follow up observations of microlensing events to search for planets. The system keeps an up-to-date record of all public data from OGLE and MOA together with any existing RoboNet data and produces new PSPL fits whenever new data arrives. It then uses these fits to predict the current or future magnitudes of events, and selects those to observe which will maximise the probability of detecting planets for a given telescope and observing time. The system drives the RoboNet telescopes automatically based on these priorities, but it is also designed to be used interactively by human observers. The prioritisation options, such as telescope/instrument parameters, observing conditions and available time can all be controlled via a web-form, and the output target list can also be customised and sorted to show the parameters that the user desires. The interactive interface is available at http://www.artemis-uk.org/web-PLOP/

  19. Introduo aos Algoritmos Randomizados

    E-Print Network [OSTI]

    Moreira, Carlos Gustavo

    Introdução aos Algoritmos Randomizados #12;#12;Publicações Matemáticas Introdução aos Algoritmos Mikhalkin · Introdução aos Algoritmos Randomizados - Celina de Figueiredo, Guilherme da Fonseca, Manoel do curso "Introdu¸c~ao aos Algoritmos Randomizados" ´e apresentar a pesquisadores e estudantes da

  20. Automated Surface Observing System: Standby Power Options

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

    contained group of sensors and data gathering equipment that produces an automated weather observation * Weather observations support aviation, climate data, non government...

  1. Facility class Rayleigh beacon AO system for the 4.2m William Herschel Telescope

    E-Print Network [OSTI]

    R. G. M. Rutten; P. Clark; R. M. Myers; R. W. Wilson; R. G. Bingham; E. Emsellem; T. Gregory; R. A. Humphreys; J. H. Knapen; G. Moretto; S. L. Morris; G. Talbot

    2002-08-07

    A rationale is presented for the use of a relatively low-altitude Rayleigh Laser Guide Star to provide partial adaptive optics correction across a large fraction of the sky on the 4.2m William Herschel Telescope. The scientific motivation is highlighted and supported by model calculations. An overview the technical implementation of the system is presented.

  2. Test, debug and development environment of Subaru Observation Software System

    E-Print Network [OSTI]

    Hayashi, Saeko S.

    - 1/7 - Test, debug and development environment of Subaru Observation Software System Junichi have a computer system in Japan which simulates the network of the summit system in part. Software test, Japan ABSTRACT Subaru Observation Software System (SOSS) provides observers with so called high

  3. Ocean Observing System Simulation Experiments at AOML

    E-Print Network [OSTI]

    criteria and rigorous validation methods developed for atmospheric OSSE systems* · Partnership with CIMAS The system has been rigorously validated to demonstrate that credible impact assessments are obtained without: Improve ocean analyses and forecasts for two applications · Predict transport and dispersion of oil spills

  4. DESIGN OF THE GREAT LAKES OBSERVING SYSTEM ENTERPRISE ARCHITECTURE

    E-Print Network [OSTI]

    DESIGN OF THE GREAT LAKES OBSERVING SYSTEM ENTERPRISE ARCHITECTURE T.J. Dekker1 , J.V. DePinto1 , S, collaborative, and consensus-based enterprise architecture design process was conducted under the direction that will achieve an integrated, comprehensive, and sustainable observing system enterprise for the Great Lakes

  5. Seismic Observation Systems in Nagoya University and Publication of Data

    E-Print Network [OSTI]

    Southern California, University of

    Seismic Observation Systems in Nagoya University and Publication of Data Nobuo Fukuwa,a) Jun Tobita,b) and Hiroaki Kojimac) This paper reports the current situation of the seismic monitoring program conducted by Nagoya University. First, the system for observing seismic ground motion in the Tokai Region is described

  6. Rule-based system architecting of Earth observation satellite systems

    E-Print Network [OSTI]

    Selva Valero, Daniel

    2012-01-01

    System architecting is concerned with exploring the tradespace of early, high-level, system design decisions with a holistic, value-centric view. In the last few years, several tools and methods have been developed to ...

  7. Controllers with Minimal Observation Power (Application to Timed Systems)

    E-Print Network [OSTI]

    David, Alexandre

    Controllers with Minimal Observation Power (Application to Timed Systems) Peter Bulychev1 , Franck, Danish-Chinese Center for Cyber Physical Systems (IDEA4CPS) and VKR Center of Excellence MT-LAB. #12;The iterations. We apply our approach to timed systems. We have developed a tool prototype and analyze

  8. Scavenging quantum information: Multiple observations of quantum systems

    E-Print Network [OSTI]

    Peter Rapcan; John Calsamiglia; Ramon Munoz-Tapia; Emilio Bagan; Vladimir Buzek

    2011-05-26

    Given an unknown state of a qudit that has already been measured optimally, can one still extract any information about the original unknown state? Clearly, after a maximally informative measurement, the state of the system `collapses' into a post-measurement state from which the {\\em{same}} observer cannot obtain further information about the original state of the system. However, the system still encodes a significant amount of information about the original preparation for a second observer who is unaware of the actions of the first one. We study how a series of independent observers can obtain, or scavenge, information about the unknown state of a system (quantified by the fidelity) when they sequentially measure it. We give closed-form expressions for the estimation fidelity, when one or several qudits are available to carry information about the single-qudit state, and study the `classical' limit when an arbitrarily large number of observers can obtain (nearly) complete information on the system. In addition to the case where all observers perform most informative measurements we study the scenario where a finite number of observers estimate the state with equal fidelity,regardless of their position in the measurement sequence; and the scenario where all observers use identical measurement apparata (up to a mutually unknown orientation) chosen so that a particular observer's estimation fidelity is maximized.

  9. Pole placement design for quantum systems via coherent observers

    E-Print Network [OSTI]

    Zibo Miao; Matthew R. James; Valery A. Ugrinovskii

    2015-09-17

    We previously extended Luenberger's approach for observer design to the quantum case, and developed a class of coherent observers which tracks linear quantum stochastic systems in the sense of mean values. In light of the fact that the Luenberger observer is commonly and successfully applied in classical control, it is interesting to investigate the role of coherent observers in quantum feedback. As the first step in exploring observer-based coherent control, in this paper we study pole-placement techniques for quantum systems using coherent observers, and in such a fashion, poles of a closed-loop quantum system can be relocated at any desired locations. In comparison to classical feedback control design incorporating the Luenberger observer, here direct coupling between a quantum plant and the observer-based controller are allowed to enable a greater degree of freedom for the design of controller parameters. A separation principle is presented, and we show how to design the observer and feedback independently to be consistent with the laws of quantum mechanics. The proposed scheme is applicable to coherent feedback control of quantum systems, especially when the transient dynamic response is of interest, and this issue is illustrated in an example.

  10. Preprint, 9th Symposium on Integrated Observing and Assimilation Systems

    E-Print Network [OSTI]

    Droegemeier, Kelvin K.

    innovative observing systems for high- resolution sensing of the lower atmosphere. The devel- opment of low-cost with polarimetric capabilities is one of the first goals. Such networks are to probe the lower atmos- phere

  11. Integrating spacecraft and aircraft in Earth Observation System architectures

    E-Print Network [OSTI]

    Suarez, Brandon H

    2011-01-01

    The Global Earth Observation System (GEOS) is the essential data gathering network that enables the advancement of Earth science. In recent years, efforts have been made to understand the major GEOS architectural tradeoffs. ...

  12. Control Landscapes for Observable Preparation with Open Quantum Systems

    E-Print Network [OSTI]

    Rebing Wu; Alexander Pechen; Herschel Rabitz; Michael Hsieh; Benjamin Tsou

    2007-08-16

    A quantum control landscape is defined as the observable as a function(al) of the system control variables. Such landscapes were introduced to provide a basis to understand the increasing number of successful experiments controlling quantum dynamics phenomena. This paper extends the concept to encompass the broader context of the environment having an influence. For the case that the open system dynamics are fully controllable, it is shown that the control landscape for open systems can be lifted to the analysis of an equivalent auxiliary landscape of a closed composite system that contains the environmental interactions. This inherent connection can be analyzed to provide relevant information about the topology of the original open system landscape. Application to the optimization of an observable expectation value reveals the same landscape simplicity observed in former studies on closed systems. In particular, no false sub-optimal traps exist in the system control landscape when seeking to optimize an observable, even in the presence of complex environments. Moreover, a quantitative study of the control landscape of a system interacting with a thermal environment shows that the enhanced controllability attainable with open dynamics significantly broadens the range of the achievable observable values over the control landscape.

  13. A digital video system for observing and recording occultations

    E-Print Network [OSTI]

    Barry, M A; Pavlov, Hristo; Hanna, William; McEwan, Alistair; Filipovic, Miroslav

    2015-01-01

    Stellar occultations by asteroids and outer solar system bodies can offer ground based observers with modest telescopes and camera equipment the opportunity to probe the shape, size, atmosphere and attendant moons or rings of these distant objects. The essential requirements of the camera and recording equipment are: good quantum efficiency and low noise, minimal dead time between images, good horological faithfulness of the image time stamps, robustness of the recording to unexpected failure, and low cost. We describe the Astronomical Digital Video occultation observing and recording System (ADVS) which attempts to fulfil these requirements and compare the system with other reported camera and recorder systems. Five systems have been built, deployed and tested over the past three years, and we report on three representative occultation observations: one being a 9 +/-1.5 second occultation of the trans-Neptunian object 28978 Ixion (mv=15.2) at 3 seconds per frame, one being a 1.51 +/-0.017 second occultation ...

  14. Development and validation of standard classroom observation systems for school practitioners: Ecobehavioral Assessment Systems Software (EBASS)

    E-Print Network [OSTI]

    Greenwood, Charles R.; Carta, Judith J.; Kamps, Debra; Terry, Barbara; Delquadri, Joseph

    1994-01-01

    The development and validation of Ecobehavioral Assessment Systems Software (EBASS), a computer-assisted observational system for school practitioners, are described. Portable computers, used to support observational assessment, vastly improve...

  15. A cooperative control algorithm for camera based observational systems.

    SciTech Connect (OSTI)

    Young, Joseph G.

    2012-01-01

    Over the last several years, there has been considerable growth in camera based observation systems for a variety of safety, scientific, and recreational applications. In order to improve the effectiveness of these systems, we frequently desire the ability to increase the number of observed objects, but solving this problem is not as simple as adding more cameras. Quite often, there are economic or physical restrictions that prevent us from adding additional cameras to the system. As a result, we require methods that coordinate the tracking of objects between multiple cameras in an optimal way. In order to accomplish this goal, we present a new cooperative control algorithm for a camera based observational system. Specifically, we present a receding horizon control where we model the underlying optimal control problem as a mixed integer linear program. The benefit of this design is that we can coordinate the actions between each camera while simultaneously respecting its kinematics. In addition, we further improve the quality of our solution by coupling our algorithm with a Kalman filter. Through this integration, we not only add a predictive component to our control, but we use the uncertainty estimates provided by the filter to encourage the system to periodically observe any outliers in the observed area. This combined approach allows us to intelligently observe the entire region of interest in an effective and thorough manner.

  16. Circle criterion observer for a compression system Bjrnar Bhagen

    E-Print Network [OSTI]

    Gravdahl, Jan Tommy

    .gravdahl@itk.ntnu.no Abstract-- Observers for a compression system using turbo compressors are derived for a model that captures speed. Results are validated by simulations. I. MOTIVATION Compression systems using turbo compressors, centrifugal or axial, are exposed to the phenomenons of surge and rotating stall. Surge is an axisymmtrical

  17. OBSERVING LYAPUNOV EXPONENTS OF INFINITE-DIMENSIONAL DYNAMICAL SYSTEMS

    E-Print Network [OSTI]

    Ott, William

    OBSERVING LYAPUNOV EXPONENTS OF INFINITE-DIMENSIONAL DYNAMICAL SYSTEMS WILLIAM OTT, MAURICIO A. RIVAS, AND JAMES WEST Abstract. Can the Lyapunov exponents of infinite-dimensional dynamical systems spaces generated by evolution partial differential equations. Contents 1. Introduction 1 1.1. Lyapunov

  18. Diferenciais Introdu c ao

    E-Print Network [OSTI]

    Barata, João Carlos Alves

    uma funâ?º câ? ao de uma variâ?? avel e um conjunto finito de suas derivadas. Vamos tentar formalizar essa

  19. Cycles in the Earth System : AOS/GEOL/GEOG 346 Desired Background: Math 240 -Calculus III or higher, Phys 161 -

    E-Print Network [OSTI]

    Zeng, Ning

    : 1 midterm (20%), Project (30%), Final (50%). Syllabus Date Topic Reading Week-1 Global change of solar luminosity. Ch-1 Week-2 Introduction to Systems and feedbacks: Systems, components, Daisy World. Ch-2 Week-3 Global Energy balance, Greenhouse effect: Greehouse gases, clouds, radiation balance. Ch

  20. Formation of Double Neutron Star systems as implied by observations

    E-Print Network [OSTI]

    Beniamini, Paz

    2015-01-01

    Double Neutron Stars (DNS) have to survive two supernovae and still remain bound. This sets strong limits on the nature of the second collapse in these systems. We consider the masses and orbital parameters of the DNS population and constrain the two distributions of mass ejection and kick velocities directly from observations with no a-priori assumptions regarding evolutionary models and/or the types of the supernovae involved. We show that there is strong evidence for two distinct types of supernovae in these systems, where the second collapse in the majority of the observed systems involved small mass ejection ($\\Delta M\\lesssim 0.5M_{\\odot}$) and a corresponding low-kick velocity ($v_{k}\\lesssim 30 km/sec$). This formation scenario is compatible, for example, with an electron capture supernova. Only a minority of the systems have formed via the standard SN scenario involving larger mass ejection of $\\sim 2.2 M_{\\odot}$ and kick velocities of up to $400$km/sec. Due to the typically small kicks in most DNS ...

  1. Towards the theory of control in observable quantum systems

    E-Print Network [OSTI]

    V P Belavkin

    2004-08-02

    An operational description of the controlled Markov dynamics of quantum-mechanical system is introduced. The feedback control strategies with regard to the dynamical reduction of quantum states in the course of quantum real-time measurements are discribed in terms of quantum filtering of these states. The concept of sufficient coordinates for the description of the a posteriori quantum states from a given class is introduced, and it is proved that they form a classical Markov process with values in either state operators or state vector space. The general problem of optimal control of a quantum-mechanical system is discussed and the corresponding Bellman equation in the space of sufficient coordinates is derived. The results are illustrated in the example of control of the semigroup dynamics of a quantum system that is instantaneously observed at discrete times and evolves between measurement times according to the Schroedinger equation.

  2. Rule-Based System Architecting of Earth Observing Systems: Earth Science Decadal Survey

    E-Print Network [OSTI]

    Selva, Daniel

    This paper presents a methodology to explore the architectural trade space of Earth observing satellite systems, and applies it to the Earth Science Decadal Survey. The architecting problem is formulated as a combinatorial ...

  3. Solar System Formation Deduced from Observations of Matter

    E-Print Network [OSTI]

    Herndon, J M

    2004-01-01

    Aspects of our Solar System's formation are deduced from observations of the chemical nature of matter. Massive cores are indicative of terrestrial-planet-composition-similarity to enstatite chondrite meteorites, whose highly-reduced state of oxidation may be thermodynamically stable in solar matter only at elevated temperatures and pressures. Consistent with the formation of Earth as envisioned by Arnold Eucken, thermodynamic considerations lead to the deduction that the terrestrial planets formed by liquid-condensation, raining out from the central regions of hot, gaseous protoplanets. The mass of protoplanetary-Earth, estimated to be 275-305mE, is similar to the mass of Jupiter, 318mE. Solar primordial gases and volatile elements were separated from the terrestrial planets early after planet formation, presumably during some super-luminous solar event, perhaps even before Mercury had completely formed. The pre-super-luminosity-terrestrial-planet mass distribution appears to be more consistent with observat...

  4. Thermodynamic properties of mesoscale convective systems observed during BAMEX

    SciTech Connect (OSTI)

    Correia, James; Arritt, R.

    2008-11-01

    Dropsonde observations from the Bow-echo and Mesoscale convective vortex EXperiment (BAMEX) are used to document the spatio-temporal variability of temperature, moisture and wind within mesoscale convective systems (MCSs). Onion type sounding structures are found throughout the stratiform region of MCSs but the temperature and moisture variability is large. Composite soundings were constructed and statistics of thermodynamic variability were generated within each sub-region of the MCS. The calculated air vertical velocity helped identify subsaturated downdrafts. We found that lapse rates within the cold pool varied markedly throughout the MCS. Layered wet bulb potential temperature profiles seem to indicate that air within the lowest several km comes from a variety of source regions. We also found that lapse rate transitions across the 0 C level were more common than isothermal, melting layers. We discuss the implications these findings have and how they can be used to validate future high resolution numerical simulations of MCSs.

  5. Common Cyber Security Vulnerabilities Observed in Control System...

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

    Systems (September 2011) Vulnerability Analysis of Energy Delivery Control Systems - 2011 Lessons Learned from Cyber Security Assessments of SCADA and Energy Management Systems...

  6. Observations

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

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

  7. H menos 3100 candidatos ao

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    cursos de ciências e tecnologias p 9 #12;Menos 3100 alunos querem concorrer ao ensino superior Educação ciências e tecnologias Menos alunos inscritos para exames e também menos candidatos ao en- sino superior

  8. Observations of designer behaviors in complex system design

    E-Print Network [OSTI]

    Austin-Breneman, Jesse

    2011-01-01

    The design of large-scale engineering systems requires design teams to balance a complex set of considerations. Formal approaches for optimizing complex system design assume that designers behave in a rational, consistent ...

  9. Navigation System for Ground Vehicles using Temporally Interconnected Observers

    E-Print Network [OSTI]

    navigation technique for an automotive vehicle. This method involves several observers, each designed attitude measurements from an inertial measurement unit (IMU) is performed (at rest) on the launch platform

  10. S3: THE IBM SMART SURVEILLANCE SYSTEM: FROM TRANSACTIONAL SYSTEMS TO OBSERVATIONAL SYSTEMS

    E-Print Network [OSTI]

    Senior, Andrew

    sensor signals, indexing and searching sensor meta-data, data mining and scalability. In this paper we Computer Vision Group, IBM T. J. Watson Research Center ABSTRACT Pervasive sensor based systems. Enabling and building such systems also poses many technology challenges, extracting information from

  11. Observational Analysis of the Predictability of Mesoscale Convective Systems ISRAEL L. JIRAK AND WILLIAM R. COTTON

    E-Print Network [OSTI]

    Observational Analysis of the Predictability of Mesoscale Convective Systems ISRAEL L. JIRAK (Manuscript received 30 December 2005, in final form 4 October 2006) ABSTRACT Mesoscale convective systems of usefulness in operational forecasting. 1. Introduction Mesoscale convective systems (MCSs) frequently de

  12. System architecting of a campaign of earth observing satellites

    E-Print Network [OSTI]

    Colson, Justin M

    2008-01-01

    Given the current level of concern over anthropogenic climate change, and the ongoing debate worldwide regarding what action should be taken to reduce and reverse future warming, the ability to collect data on Earth system ...

  13. Algorithms, Protocols & Systems for Remote Observation Using Networked Robotic Cameras 

    E-Print Network [OSTI]

    Qin, Ni

    2010-01-16

    for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair of Committee, Dezhen Song Committee Members, Ricardo Gutierrez-Osuna Dmitri Loguinov Ergun Akleman Head of Department, Valerie E. Taylor May 2008 Major Subject: Computer Science iii ABSTRACT Algorithms... in remote observation using networked robotic cameras. v To my lovely cat Maomao, my dear family Yu and Amy, and my parents vi ACKNOWLEDGMENTS I would like to thank my committee chair, Dr. Dezhen Song, and my committee members, Dr. Gutierrez-Osuna, Dr...

  14. NOAA's Integrated Observing System SSEC 50th Anniversary

    E-Print Network [OSTI]

    /NASA/DoD mission, is the country's first operational space weather mission providing data to NOAA's Space Weather;2 Supporting NOAA's Mission NOAA is a science-based services agency engaged with the entire Earth system science enterprise. Climate Adaptation & Mitigation Weather Ready Nation Resilient Coastal Communities

  15. NASA's Earth Observing System CloudsandtheEarth'sRa

    E-Print Network [OSTI]

    of Gary G. Gibson, Head of the Radiation and Aerosols Branch, and Bruce A. Wielicki, CERES for improving our scientific understanding of ongoing natural and human-induced global climate change's Radiant Energy System (CERES) experiment is one of the highest priority sci- entific satellite instruments

  16. Mathematical Foundations for Efficient Structural Controllability and Observability Analysis of Complex Systems

    E-Print Network [OSTI]

    Zufiria, Pedro J.

    The relationship between structural controllability and observability of complex systems is studied. Algebraic and graph theoretic tools are combined to prove the extent of some controller/observer duality results. Two ...

  17. Designing a Stochastic Adaptive Impulsive Observer for Stochastic Linear and Nonlinear Impulsive Systems

    SciTech Connect (OSTI)

    Ayati, Moosa [Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario (Canada); Faculty of Electrical and Computer Engineering, K. N. Toosi University of Technology, Tehran (Iran, Islamic Republic of); Alwan, Mohamad; Liu Xinzhi [Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario (Canada); Khaloozadeh, Hamid [Faculty of Electrical and Computer Engineering, K. N. Toosi University of Technology, Tehran (Iran, Islamic Republic of)

    2011-11-30

    State observation (estimation) is a very important issue in system analysis and control. This paper develops a new observer called Stochastic Adaptive Impulsive Observer (SAIO) for the state estimation of impulsive systems. The proposed observer is applicable to linear and nonlinear stochastic impulsive systems. In addition, the effect of parametric uncertainty is considered and unknown parameters of the system are estimated by suitable adaptation laws. Impulsive system theory, particularly stochastic Lyapunov-like function, is used to analyze the stability and convergence of the state estimations. The main advantages of the proposed observer are: 1) it gives continuous estimation from discrete time measurements of the system output, and 2) it is useful for state estimation when continuous measurements are impossible or expensive. Simulation results show the effectiveness of the proposed observer and we believe that it has many applications in control and estimation theories.

  18. A climate sensitivity estimate using Bayesian fusion of instrumental observations and an Earth System model

    E-Print Network [OSTI]

    sensitivity estimate using Bayesian fusion of instrumental observations and an Earth System model, J. Geophys System model Roman Olson,1 Ryan Sriver,1 Marlos Goes,2,3 Nathan M. Urban,4,5 H. Damon Matthews,6 MuraliA climate sensitivity estimate using Bayesian fusion of instrumental observations and an Earth

  19. Modeling Needs Related to the Regional Observing System in the Gulf of Maine

    E-Print Network [OSTI]

    Modeling Needs Related to the Regional Observing System in the Gulf of Maine RARGOM Report 05-1 Theme Session 6-7 July, 2005 Cliff House Ogunquit, Maine Convened by Regional Association for Research on the Gulf of Maine Gulf of Maine Census of Marine Life Gulf of Maine Ocean Observing System Coastal

  20. Olivier GuyonOlivier Guyon (on behalf of SCExAO team)(on behalf of SCExAO team)

    E-Print Network [OSTI]

    Guyon, Olivier

    >~10% Very small air flow to MEMS chamber Pressure sensor on output (post MEMS, 2014 On-sky wavefront correction with aOn-sky wavefront correction with a 2048 actuator MEMS2048 actuator MEMS Contact: oliv.guyon@gmail.com #12;2 Extreme AO systems (superAO+coronagraph) myths #12

  1. Astrometrical Observations of Pluto - Charon System with the Automated Telescopes of Pulkovo Observatory

    E-Print Network [OSTI]

    Devyatkin, Alexander V; Slesarenko, Vyacheslav Yu

    2015-01-01

    The space probe 'New Horizon' was launched on 19th of January 2006 in order to study Pluto and its moons. Spacecraft will fly by Pluto as close as 12500 km in the middle of July 2015 and will get the most detailed images of Pluto and its moon until this moment. At the same time, observation obtained by the ground-based telescopes may also be helpful for the research of such distant system. Thereby, the Laboratory of observational astrometry of Pulkovo Observatory of RAS made a decision to reprocess observations obtained during last decade. More than 350 positional observations of Pluto - Charon system were carried out with the mirror astrograph ZA-320M at Pulkovo and Maksutov telescope MTM-500M near Kislovodsk. These observations were processed by means of software system APEX-II developed in Pulkovo observatory and numerical simulation was performed to calculate the differences between positions of photocenter and barycenter of Pluto - Charon system.

  2. Adaptac~ao ao Contexto em Sistemas de Comunicac~ao Heterogeneos

    E-Print Network [OSTI]

    Rodrigues, Luís E.T.

    de Ci^encias da Universidade de Lisboa Campo Grande, 1749­016 Lisboa Portugal Technical reports,lrosa,nalmeida}@lasige.di.fc.ul.pt Hugo Miranda Lu´is Rodrigues {hmiranda,ler}@di.fc.ul.pt Universidade de Lisboa Resumo Hoje em dia beneficia da disponibilidade de uma pilha de comunicac¸ ~ao em grupo reconfigur´avel. 1 Introduc¸~ao Hoje em

  3. EVALUATION OF ULTRASONIC SNOW DEPTH SENSORS FOR AUTOMATED SURFACE OBSERVING SYSTEMS (ASOS)

    E-Print Network [OSTI]

    i THESIS EVALUATION OF ULTRASONIC SNOW DEPTH SENSORS FOR AUTOMATED SURFACE OBSERVING SYSTEMS (ASOS PREPARED UNDER OUR SUPERVISION BY WENDY ANN BRAZENEC ENTITLED EVALUATION OF ULTRASONIC SNOW DEPTH SENSORS;iii ABSTRACT OF THESIS EVALUATION OF ULTRASONIC SNOW DEPTH SENSORS FOR AUTOMATED SURFACE OBSERVING

  4. Observing System Simulation Experiments (OSSEs) for the Mid-Columbia Basin

    SciTech Connect (OSTI)

    Zack, J; Natenberg, E J; Knowe, G V; Waight, K; Manobianco, J; Hanley, D; Kamath, C

    2011-09-13

    The overall goal of this multi-phased research project known as WindSENSE is to develop an observation system deployment strategy that would improve wind power generation forecasts. The objective of the deployment strategy is to produce the maximum benefit for 1- to 6-hour ahead forecasts of wind speed at hub-height ({approx}80 m). In this phase of the project the focus is on the Mid-Columbia Basin region, which encompasses the Bonneville Power Administration (BPA) wind generation area (Figure 1) that includes the Klondike, Stateline, and Hopkins Ridge wind plants. There are two tasks in the current project effort designed to validate the Ensemble Sensitivity Analysis (ESA) observational system deployment approach in order to move closer to the overall goal: (1) Perform an Observing System Experiment (OSE) using a data denial approach. The results of this task are presented in a separate report. (2) Conduct a set of Observing System Simulation Experiments (OSSE) for the Mid-Colombia basin region. This report presents the results of the OSSE task. The specific objective is to test strategies for future deployment of observing systems in order to suggest the best and most efficient ways to improve wind forecasting at BPA wind farm locations. OSSEs have been used for many years in meteorology to evaluate the potential impact of proposed observing systems, determine tradeoffs in instrument design, and study the most effective data assimilation methodologies to incorporate the new observations into numerical weather prediction (NWP) models (Atlas 1997; Lord 1997). For this project, a series of OSSEs will allow consideration of the impact of new observing systems of various types and in various locations.

  5. Capability of the penetrator seismometer system for lunar seismic event observation

    E-Print Network [OSTI]

    Takeuchi, Nozomu

    Capability of the penetrator seismometer system for lunar seismic event observation R. Yamada a of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara Penetrator Moonquake Lunar exploration Planetary seismology a b s t r a c t We developed a seismometer system

  6. time scale observed in some close binary systems (19), and tidal dissipation (20)

    E-Print Network [OSTI]

    Stanley, H. Eugene

    time scale observed in some close binary systems (19), and tidal dissipation (20) may also cause). At this stage, the core of star A undergoes collapse, and the residual nuclear fuel is ignited to power aware that both tidal and general relativistic ef- fects will be important in this system

  7. Stochastic Modeling and Optimization for Robust Power Management in a Partially Observable System

    E-Print Network [OSTI]

    Qiu, Qinru

    -of-the- art system modules are capable of trading power for performance or being put into sleep or low powerStochastic Modeling and Optimization for Robust Power Management in a Partially Observable System As the hardware and software complexity grows, it is unlikely for the power management hardware/software to have

  8. Improved upper bounds on Kaluza-Klein gravity with current Solar System experiments and observations

    E-Print Network [OSTI]

    Xue-Mei Deng; Yi Xie

    2015-10-10

    As an extension of previous works on classical tests of Kaluza-Klein (KK) gravity and as an attempt to find more stringent constraints on this theory, its effects on physical experiments and astronomical observations conducted in the Solar System are studied. We investigate the gravitational time delay at inferior conjunction caused by KK gravity, and use new Solar System ephemerides and the observation of \\textit{Cassini} to strengthen constraints on KK gravity by up to two orders of magnitude. These improved upper bounds mean that the fifth-dimensional space in the soliton case is a very flat extra dimension in the Solar System, even in the vicinity of the Sun.

  9. Accurately Estimating the State of a Geophysical System with Sparse Observations: Predicting the Weather

    E-Print Network [OSTI]

    Zhe An; Daniel Rey; Henry D. I. Abarbanel

    2014-05-11

    Utilizing the information in observations of a complex system to make accurate predictions through a quantitative model when observations are completed at time $T$, requires an accurate estimate of the full state of the model at time $T$. When the number of measurements $L$ at each observation time within the observation window is larger than a sufficient minimum value $L_s$, the impediments in the estimation procedure are removed. As the number of available observations is typically such that $L \\ll L_s$, additional information from the observations must be presented to the model. We show how, using the time delays of the measurements at each observation time, one can augment the information transferred from the data to the model, removing the impediments to accurate estimation and permitting dependable prediction. We do this in a core geophysical fluid dynamics model, the shallow water equations, at the heart of numerical weather prediction. The method is quite general, however, and can be utilized in the analysis of a broad spectrum of complex systems where measurements are sparse. When the model of the complex system has errors, the method still enables accurate estimation of the state of the model and thus evaluation of the model errors in a manner separated from uncertainties in the data assimilation procedure.

  10. AO -Adaptive Optics The currently operational AO, -called "AO-76" was installed on the NST in 2010. AO-76 incorporates a

    E-Print Network [OSTI]

    in 2010. AO-76 incorporates a 97 actuator deformable mirror (DM), a Shack-Hartmann wave front sensor in Summer 2013 with regular operation in Summer 2014. NST-AOs AO-76 AO-308 MCAO Wavefront sensor Shack-Hartmann WFS with 76 subapertures Shack-Hartmann WFS with 308 subapertures Two Shack-Hartmann WFSs for narrow

  11. Faculty Observations: John Scofield An Energy-Monitoring System for Stanford

    E-Print Network [OSTI]

    Scofield, John H.

    and Usage, a course that has evolved over the years into Introduction to Solar Energy and, this semesterFaculty Observations: John Scofield An Energy-Monitoring System for Stanford University's Leslie to make a major change in my research field. In graduate school and at Bell Labs I had studied noise

  12. Observation and Confirmation of Six Strong Lensing Systems in The Dark Energy Survey Science Verification Data

    E-Print Network [OSTI]

    Nord, B; Lin, H; Diehl, H T; Helsby, J; Kuropatkin, N; Amara, A; Collett, T; Allam, S; Caminha, G; De Bom, C; Desai, S; Dúmet-Montoya, H; Pereira, M Elidaiana da S; Finley, D A; Flaugher, B; Furlanetto, C; Gaitsch, H; Gill, M; Merritt, K W; More, A; Tucker, D; Rykoff, E S; Rozo, E; Abdalla, F B; Agnello, A; Auger, M; Brunner, R J; Kind, M Carrasco; Castander, F J; Cunha, C E; da Costa, L N; Foley, R; Gerdes, D W; Glazebrook, K; Gschwend, J; Hartley, W; Kessler, R; Lagattuta, D; Lewis, G; Maia, M A G; Makler, M; Menanteau, F; Niernberg, A; Scolnic, D; Vieira, J D; Gramillano, R; Abbott, T M C; Banerji, M; Benoit-Lévy, A; Brooks, D; Burke, D L; Capozzi, D; Rosell, A Carnero; Carretero, J; D'Andrea, C B; Dietrich, J P; Doel, P; Evrard, A E; Frieman, J; Gaztanaga, E; Gruen, D; Honscheid, K; James, D J; Kuehn, K; Li, T S; Lima, M; Marshall, J L; Martini, P; Melchior, P; Miquel, R; Neilsen, E; Nichol, R C; Ogando, R; Plazas, A A; Romer, A K; Sako, M; Sanchez, E; Scarpine, V; Schubnell, M; Sevilla-Noarbe, I; Smith, R C; Soares-Santos, M; Sobreira, F; Suchyta, E; Swanson, M E C; Tarle, G; Thaler, J; Walker, A R; Wester, W; Zhang, Y

    2015-01-01

    We report the observation and confirmation of the first group- and cluster-scale strong gravitational lensing systems found in Dark Energy Survey (DES) data. Through visual inspection of data from the Science Verification (SV) season, we identified 53 candidate systems. We then obtained spectroscopic follow-up of 21 candidates using the Gemini Multi-Object Spectrograph (GMOS) at the Gemini South telescope and the Inamori-Magellan Areal Camera and Spectrograph (IMACS) at the Magellan/Baade telescope. With this follow-up, we confirmed six candidates as gravitational lenses: Three of the systems are newly discovered, and the remaining three were previously known. Of the 21 observed candidates, the remaining 15 were either not detected in spectroscopic observations, were observed and did not exhibit continuum emission (or spectral features), or were ruled out as lensing systems. The confirmed sample consists of one group-scale and five galaxy cluster-scale lenses. The lensed sources range in redshift z ~ 0.80-3.2...

  13. Strain and stress eld in Taiwan oblique convergent system: constraints from GPS observation and tectonic data

    E-Print Network [OSTI]

    Lee, Jian-Cheng

    Strain and stress ¢eld in Taiwan oblique convergent system: constraints from GPS observation, Taiwan b Institute of Geophysics, National Central University, Chungli 320, Taiwan c Laboratoire de Sciences, Academia Sinica, P.O. Box 1-55, Nankang, Taipei 115, Taiwan Received 20 January 2003; received

  14. High resolution remote sensing observations for missions to the Jovian system: Io as a case study

    E-Print Network [OSTI]

    California at Berkeley, University of

    High resolution remote sensing observations for missions to the Jovian system: Io as a case study Keywords: Io Remote sensing Instruments a b s t r a c t We present modeled images of Io at a variety objectives that could be achieved from missions engaged in long range remote-sensing of Io during

  15. Autonomous Observing and Control Systems for PAIRITEL, a 1.3m Infrared Imaging Telescope

    E-Print Network [OSTI]

    J. S. Bloom; Dan L. Starr; Cullen H. Blake; M. F. Skrutskie; Emilio E. Falco

    2005-11-30

    The Peters Automated Infrared Imaging Telescope (PAIRITEL) is the first meter-class telescope operating as a fully robotic IR imaging system. Dedicated in October 2004, PAIRITEL began regular observations in mid-December 2004 as part of a 1.5 year commissioning period. The system was designed to respond without human intervention to new gamma-ray burst transients: this milestone was finally reached on November 9, 2005 but the telescope had a number of semi-automated sub-10 minute responses throughout early commissioning. When not operating in Target of Opportunity mode, PAIRITEL performs a number of queue scheduled transient monitoring campaigns. To achieve this level of automation, we have developed communicating tools to connect the various sub-systems: an intelligent queue scheduling database, run-time configurable observation sequence software, a data reduction pipeline, and a master state machine which monitors and controls all functions within and affecting the observatory.

  16. Um Sistema Computacional integrando Suporte `a Decis~ao na Area de Reproduc ~ao Humana

    E-Print Network [OSTI]

    Baranauskas, José Augusto

    desenvolvimento de um sistema computacional que a implementa. Tais elementos permitem informatizar os processos e¸ ~ao. Palavras-chaves: Reproduc¸ ~ao Assistida, Sistemas de Suporte `a Decis~ao, Aprendizado de M´aquina

  17. A.O. Smith | Department of Energy

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

    A.O. Smith A.O. Smith The energy advantage of micro-CHP compared to standard energy building usage. Based on primary source energy combined heat and power has the potential to...

  18. Optical observations of Be/X-ray transient system KS 1947+300

    E-Print Network [OSTI]

    U. Kiziloglu; A. Baykal; N. Kiziloglu

    2006-08-05

    ROTSE-IIId observations of the Be/X-ray transient system KS 1947+300 obtained between September 2004 and December 2005 make it possible to study the correlation between optical and X-ray activity. The optical outburst of 0.1 mag was accompanied by an increase in X-ray flux in 2004 observations. Strong correlation between the optical and X-ray light curves suggests that neutron star directly accretes from the outflowing material of Be star. The nearly zero time lag between X-ray and optical light curves suggests a heating of the disk of Be star by X-rays. No optical brightening and X-ray enhancement was seen in 2005 observations. There is no indication of the orbital modulation in the optical light curve.

  19. Urban and land surface effects on the 30 July 2003 mesoscale convective system event observed in the southern Great Plains

    E-Print Network [OSTI]

    Niyogi, Dev

    Urban and land surface effects on the 30 July 2003 mesoscale convective system event observed/Atmosphere Mesoscale Prediction System (COAMPS 1 ) to investigate the impact of urban and land vegetation processes on the prediction of the mesoscale convective system (MCS) observed on 30 July 2003 in the vicinity of Oklahoma City

  20. Observation of transient gain without population inversion in a laser-cooled rubidium lambda system

    E-Print Network [OSTI]

    S. R. de Echaniz; Andrew D. Greentree; A. V. Durrant; D. M. Segal; J. P. Marangos; J. A. Vaccaro

    2001-05-17

    We have observed clear Rabi oscillations of a weak probe in a strongly driven three-level lambda system in laser-cooled rubidium for the first time. When the coupling field is non-adiabatically switched on using a Pockels cell, transient probe gain without population inversion is obtained in the presence of uncoupled absorptions. Our results are supported by three-state computations.

  1. Constraints on the progenitor system and the environs of SN 2014J from deep radio observations

    SciTech Connect (OSTI)

    Pérez-Torres, M. A.; Alberdi, A. [Instituto de Astrofísica de Andalucía, Glorieta de las Astronomía, s/n, E-18008 Granada (Spain); Lundqvist, P.; Björnsson, C. I.; Fransson, C. [Department of Astronomy, AlbaNova University Center, Stockholm University, SE-10691 Stockholm (Sweden); Beswick, R. J.; Muxlow, T. W. B.; Argo, M. K. [Jodrell Bank Centre for Astrophysics, University of Manchester, Oxford Road, Manchester M13 9PL (United Kingdom); Paragi, Z. [Joint Institute for VLBI in Europe, Postbus 2, 7990 AA Dwingeloo (Netherlands); Ryder, S. [Australian Astronomical Observatory, P.O. Box 915, North Ryde, NSW 1670 (Australia); Marcaide, J. M.; Ros, E.; Guirado, J. C. [Departamento de Astronomía i Astrofísica, Universidad de Valencia, E-46100 Burjassot, Valencia (Spain); Martí-Vidal, I. [Onsala Space Observatory, Chalmers University of Technology, SE-43992 Onsala (Sweden)

    2014-09-01

    We report deep EVN and eMERLIN observations of the Type Ia SN 2014J in the nearby galaxy M82. Our observations represent, together with JVLA observations of SNe 2011fe and 2014J, the most sensitive radio studies of Type Ia SNe ever. By combining data and a proper modeling of the radio emission, we constrain the mass-loss rate from the progenitor system of SN 2014J to M-dot ?7.0×10{sup ?10} M{sub ?} yr{sup ?1} (for a wind speed of 100 km s{sup –1}). If the medium around the supernova is uniform, then n {sub ISM} ? 1.3 cm{sup –3}, which is the most stringent limit for the (uniform) density around a Type Ia SN. Our deep upper limits favor a double-degenerate (DD) scenario—involving two WD stars—for the progenitor system of SN 2014J, as such systems have less circumstellar gas than our upper limits. By contrast, most single-degenerate (SD) scenarios, i.e., the wide family of progenitor systems where a red giant, main-sequence, or sub-giant star donates mass to an exploding WD, are ruled out by our observations. (While completing our work, we noticed that a paper by Margutti et al. was submitted to The Astrophysical Journal. From a non-detection of X-ray emission from SN 2014J, the authors obtain limits of M-dot ?1.2×10{sup ?9} M {sub ?} yr{sup –1} (for a wind speed of 100 km s{sup –1}) and n {sub ISM} ? 3.5 cm{sup –3}, for the ??r {sup –2} wind and constant density cases, respectively. As these limits are less constraining than ours, the findings by Margutti et al. do not alter our conclusions. The X-ray results are, however, important to rule out free-free and synchrotron self-absorption as a reason for the radio non-detections.) Our estimates on the limits on the gas density surrounding SN2011fe, using the flux density limits from Chomiuk et al., agree well with their results. Although we discuss the possibilities of an SD scenario passing observational tests, as well as uncertainties in the modeling of the radio emission, the evidence from SNe 2011fe and 2014J points in the direction of a DD scenario for both.

  2. Sensor Configuration Selection for Discrete-Event Systems under Unreliable Observations

    SciTech Connect (OSTI)

    Wen-Chiao Lin; Tae-Sic Yoo; Humberto E. Garcia

    2010-08-01

    Algorithms for counting the occurrences of special events in the framework of partially-observed discrete event dynamical systems (DEDS) were developed in previous work. Their performances typically become better as the sensors providing the observations become more costly or increase in number. This paper addresses the problem of finding a sensor configuration that achieves an optimal balance between cost and the performance of the special event counting algorithm, while satisfying given observability requirements and constraints. Since this problem is generally computational hard in the framework considered, a sensor optimization algorithm is developed using two greedy heuristics, one myopic and the other based on projected performances of candidate sensors. The two heuristics are sequentially executed in order to find best sensor configurations. The developed algorithm is then applied to a sensor optimization problem for a multiunit- operation system. Results show that improved sensor configurations can be found that may significantly reduce the sensor configuration cost but still yield acceptable performance for counting the occurrences of special events.

  3. Transforming observational data and theoretical isochrones into the ACS/WFC Vega-mag system

    E-Print Network [OSTI]

    Luigi R. Bedin; Santi Cassisi; Fiorella Castelli; Giampaolo Piotto; Jay Anderson; Maurizio Salaris; Yazan Momany; Adriano Pietrinferni; .

    2004-12-14

    We propose a zero-point photometric calibration of the data from the ACS/WFC on board the Hubble Space Telescope, based on a spectrum of Vega and the most up to date in-flight transmission curves of the camera. This calibration is accurate at the level of a few hundredths of a magnitude. The main purpose of this effort is to transform the entire set of evolutionary models by Pietrinferni et al. (2004) into a simple observational photometric system for ACS/WFC data, and make them available to the astronomical community. We provide the zero points for the most used ACS/WFC bands, and give basic recipes for calibrating both the observed data and the models. We also present the Colour Magnitude Diagram (CMD) from ACS data of 5 Galactic globular clusters, spanning the metallicity range -2.2<[Fe/H]<-0.04, and provide fiducial points representing their sequences from several magnitudes below the turnoff to the red giant branch tip. The observed sequences are compared with the models in the newly defined photometric system.

  4. IRTF/SPEX Observations of the Unusual Kepler Lightcurve System KIC8462852

    E-Print Network [OSTI]

    Lisse, C M; Marengo, M

    2015-01-01

    We have utilized the NASA IRTF 3m SpeX instrument's high resolution spectral mode (Rayner et al. 2003) to observe and characterize the near-infrared flux emanating from the unusual Kepler lightcurve system KIC8462852. By comparing the resulting 0.8 to 4.2 um spectrum to a mesh of model photospheric spectra, the 6 emission line analysis of the Rayner et al. 2009 catalogue, and the 25 system collection of debris disks we have observed to date using SpeX under the Near InfraRed Debris disk Survey (NIRDS; Lisse et al. 2016), we have been able to additionally characterize the system. Within the errors of our measurements, this star looks like a normal solar abundance main sequence F1V to F3V dwarf star without any obvious traces of significant circumstellar dust or gas. Using Connelley & Greene's (2014) emission measures, we also see no evidence of significant ongoing accretion onto the star nor any stellar outflow away from it. Our results are inconsistent with large amounts of static close-in obscuring mater...

  5. Observation of a phononic Mollow triplet in a hybrid spin-nanomechanical system

    E-Print Network [OSTI]

    Benjamin Pigeau; Sven Rohr; Laure Mercier de Lépinay; Arnaud Gloppe; Vincent Jacques; Olivier Arcizet

    2015-02-25

    Reminiscent of the bound character of a qubit's dynamics confined on the Bloch sphere, the observation of a Mollow triplet in the resonantly driven qubit fluorescence spectrum represents one of the founding signatures of Quantum Electrodynamics. Here we report on its observation in a hybrid spin-nanomechanical system, where a Nitro-gen Vacancy spin qubit is magnetically coupled to the vibrations of a Silicon Carbide nanowire. A resonant microwave field turns the originally parametric hybrid interac-tion into a resonant process, where acoustic phonons are now able to induce transitions between the dressed qubit states, leading to synchronized spin-oscillator dynamics. We further explore the vectorial character of the hybrid coupling to the bidimensional de-formations of the nanowire. The demonstrated microwave assisted synchronization of the spin-oscillator dynamics opens novel perspectives for the exploration of spin-dependent forces, the key-ingredient for quantum state transfer.

  6. JWST observations of stellar occultations by solar system bodies and rings

    E-Print Network [OSTI]

    Santos-Sanz, P; Pinilla-Alonso, N; Stansberry, J; Lin, Z-Y; Zhang, Z-W; Vilenius, E; Müller, Th; Ortiz, J L; Braga-Ribas, F; Bosh, A; Duffard, R; Lellouch, E; Tancredi, G; Young, L

    2015-01-01

    In this paper we investigate the opportunities provided by the James Webb Space Telescope (JWST) for significant scientific advances in the study of solar system bodies and rings using stellar occultations. The strengths and weaknesses of the stellar occultation technique are evaluated in light of JWST's unique capabilities. We identify several possible JWST occultation events by minor bodies and rings, and evaluate their potential scientific value. These predictions depend critically on accurate a priori knowledge of the orbit of JWST near the Sun-Earth Lagrange-point 2 (L2). We also explore the possibility of serendipitous stellar occultations by very small minor bodies as a by-product of other JWST observing programs. Finally, to optimize the potential scientific return of stellar occultation observations, we identify several characteristics of JWST's orbit and instrumentation that should be taken into account during JWST's development.

  7. Understanding and Improving CRM and GCM Simulations of Cloud Systems with ARM Observations

    SciTech Connect (OSTI)

    Wu, Xiaoqing

    2014-02-25

    The works supported by this ASR project lay the solid foundation for improving the parameterization of convection and clouds in the NCAR CCSM and the climate simulations. We have made a significant use of CRM simulations and ARM observations to produce thermodynamically and dynamically consistent multi-year cloud and radiative properties; improve the GCM simulations of convection, clouds and radiative heating rate and fluxes using the ARM observations and CRM simulations; and understand the seasonal and annual variation of cloud systems and their impacts on climate mean state and variability. We conducted multi-year simulations over the ARM SGP site using the CRM with multi-year ARM forcing data. The statistics of cloud and radiative properties from the long-term CRM simulations were compared and validated with the ARM measurements and value added products (VAP). We evaluated the multi-year climate simulations produced by the GCM with the modified convection scheme. We used multi-year ARM observations and CRM simulations to validate and further improve the trigger condition and revised closure assumption in NCAR GCM simulations that demonstrate the improvement of climate mean state and variability. We combined the improved convection scheme with the mosaic treatment of subgrid cloud distributions in the radiation scheme of the GCM. The mosaic treatment of cloud distributions has been implemented in the GCM with the original convection scheme and enables the use of more realistic cloud amounts as well as cloud water contents in producing net radiative fluxes closer to observations. A physics-based latent heat (LH) retrieval algorithm was developed by parameterizing the physical linkages of observed hydrometeor profiles of cloud and precipitation to the major processes related to the phase change of atmospheric water.

  8. ALMA observations of a misaligned binary protoplanetary disk system in Orion

    SciTech Connect (OSTI)

    Williams, Jonathan P.; Mann, Rita K.; Francesco, James Di; Johnstone, Doug; Matthews, Brenda; Andrews, Sean M.; Ricci, Luca; Hughes, A. Meredith; Bally, John

    2014-12-01

    We present Atacama Large Millimeter/Submillimeter Array (ALMA) observations of a wide binary system in Orion, with projected separation 440 AU, in which we detect submillimeter emission from the protoplanetary disks around each star. Both disks appear moderately massive and have strong line emission in CO 3-2, HCO{sup +} 4-3, and HCN 3-2. In addition, CS 7-6 is detected in one disk. The line-to-continuum ratios are similar for the two disks in each of the lines. From the resolved velocity gradients across each disk, we constrain the masses of the central stars, and show consistency with optical-infrared spectroscopy, both indicative of a high mass ratio ?9. The small difference between the systemic velocities indicates that the binary orbital plane is close to face-on. The angle between the projected disk rotation axes is very high, ?72°, showing that the system did not form from a single massive disk or a rigidly rotating cloud core. This finding, which adds to related evidence from disk geometries in other systems, protostellar outflows, stellar rotation, and similar recent ALMA results, demonstrates that turbulence or dynamical interactions act on small scales well below that of molecular cores during the early stages of star formation.

  9. EXERCICIOS INTRODUC ~AO `A TEORIA DOS GRAFOS

    E-Print Network [OSTI]

    Kohayakawa, Yoshiharu

    exerc´icios com data de entrega devem ser resolvidos e entregues. Estes exerc´icios far~ao parte de suaEXERC´ICIOS INTRODUC¸ ~AO `A TEORIA DOS GRAFOS 2O. SEMESTRE DE 2010 Instru¸c~oes: 1. Os problemas e avalia¸c~ao. 2. A entrega dos exerc´icios deve ser feita no come¸co da aula (as datas de entrega ser

  10. Observational Properties of Type Ib/c Supernova Progenitors in Binary Systems

    E-Print Network [OSTI]

    Kim, Hyun-Jeong; Koo, Bon-Chul

    2015-01-01

    In several recent observational studies on Type Ib/c supernovae (SNe Ib/c), the inferred ejecta masses have a peak value of 2.0 -- 4.0 $M_\\odot$, in favor of the binary scenario for their progenitors rather than the Wolf-Rayet star scenario. To investigate the observational properties of relatively low-mass helium stars in binary systems as SN Ib/c progenitors, we constructed atmospheric models with the non-LTE radiative transfer code CMFGEN, using binary star evolution models. We find that these helium stars can be characterized by relatively narrow helium emission lines if the mass-loss rate during the final evolutionary phase is significantly enhanced as implied by many SN Ib/c observations. The optical brightness of helium star progenitors can be meaningfully enhanced with a strong wind for $M \\gtrsim 4.4 M_\\odot$, but hardly affected or slightly weakened for relatively low-mass of $\\sim 3.0 M_\\odot$, compared to the simple estimate using blackbody approximation. We further confirm the previous suggestion...

  11. Transforming observational data and theoretical isochrones into the ACS/WFC Vega-mag system

    E-Print Network [OSTI]

    Bedin, L R; Castelli, F; Piotto, G; Anderson, J; Salaris, M; Momany, Y; Pietrinferni, A; Bedin, Luigi R.; Cassisi, Santi; Castelli, Fiorella; Piotto, Giampaolo; Anderson, Jay; Salaris, Maurizio; Momany, Yazan; Pietrinferni, Adriano

    2004-01-01

    We propose a zero-point photometric calibration of the data from the ACS/WFC on board the Hubble Space Telescope, based on a spectrum of Vega and the most up to date in-flight transmission curves of the camera. This calibration is accurate at the level of a few hundredths of a magnitude. The main purpose of this effort is to transform the entire set of evolutionary models by Pietrinferni et al. (2004) into a simple observational photometric system for ACS/WFC data, and make them available to the astronomical community. We provide the zero points for the most used ACS/WFC bands, and give basic recipes for calibrating both the observed data and the models. We also present the Colour Magnitude Diagram (CMD) from ACS data of 5 Galactic globular clusters, spanning the metallicity range -2.2<[Fe/H]<-0.04, and provide fiducial points representing their sequences from several magnitudes below the turnoff to the red giant branch tip. The observed sequences are compared with the models in the newly defined photom...

  12. Logica Computacional Verificac ~ao com Logicas Temporais

    E-Print Network [OSTI]

    Ayala-Rincón, Mauricio

    ´izo `a ind´ustria e a seus consumidores, como, por exemplo, a produc¸ ~ao em massa de componentes eletr

  13. 2.9 Programming and Platforms (PRO) CENS systems research strives to advance the state of the art in innovative in situ observing systems. To this end,

    E-Print Network [OSTI]

    Soatto, Stefano

    in innovative in situ observing systems. To this end, our research efforts have focused on two critical themes that cut across our broad range of observing systems: the development of practical tools and platforms platform efforts have revolved around three activities: participatory sensing mobile to web platform

  14. A Saturn Ring Observer Mission Using Multi-Mission Radioisotope Power Systems

    SciTech Connect (OSTI)

    Abelson, Robert D.; Spilker, Thomas R.; Shirley, James H. [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 301-445W, Pasadena, CA 91109-8099 (United States)

    2006-01-20

    Saturn remains one of the most fascinating planets within the solar system. To better understand the complex ring structure of this planet, a conceptual Saturn Ring Observer (SRO) mission is presented that would spend one year in close proximity to Saturn's A and B rings, and perform detailed observations and measurements of the ring particles and electric and magnetic fields. The primary objective of the mission would be to understand ring dynamics, including the microphysics of individual particles and small scale (meters to a few kilometers) phenomena such as particle agglomeration behavior. This would be accomplished by multispectral imaging of the rings at multiple key locations within the A and B rings, and by ring-particle imaging at an unprecedented resolution of 0.5 cm/pixel. The SRO spacecraft would use a Venus-Earth-Earth-Jupiter Gravity Assist (VEEJGA) and be aerocaptured into Saturn orbit using an advanced aeroshell design to minimize propellant mass. Once in orbit, the SRO would stand off from the ring plane 1 to 1.4 km using chemical thrusters to provide short propulsive maneuvers four times per revolution, effectively causing the SRO vehicle to 'hop' above the ring plane. The conceptual SRO spacecraft would be enabled by the use of a new generation of multi-mission Radioisotope Power Systems (RPSs) currently being developed by NASA and DOE. These RPSs include the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) and Stirling Radioisotope Generator (SRG). The RPSs would generate all necessary electrical power ({>=}330 We at beginning of life) during the 10-year cruise and 1-year science mission ({approx}11 years total). The RPS heat would be used to maintain the vehicle's operating and survival temperatures, minimizing the need for electrical heaters. Such a mission could potentially launch in the 2015-2020 timeframe, with operations at Saturn commencing in approximately 2030.

  15. Utilizac~ao de Chaves em Algoritmos de Detecc~ao de Diferencas para XML

    E-Print Network [OSTI]

    Hara, Carmem Satie

    Utilizac¸~ao de Chaves em Algoritmos de Detecc¸~ao de Diferenc¸as para XML Rodrigo C. Santos 1 of the algorithm. Resumo. Algoritmos de detecc¸~ao de diferenc¸as para documentos XML reali- zam uma an no mundo real e que portanto devem ser casados pelo algoritmo. A abordagem proposta neste artigo consiste

  16. The system for observing fitness instruction time (SOFIT) as a measure of energy expenditure during classroom based physical activity

    E-Print Network [OSTI]

    Honas, Jeffery J.; Washburn, Richard A.; Smith, Bryan K.; Greene, Leon; Cook-Wiens, Galen; Donnelly, Joseph E.

    2008-01-01

    The aim of this investigation was to develop an equation to estimate physical activity energy expenditure (PAEE) during a 10-min physically active academic lesson using The System for Observing Fitness Instruction Time ...

  17. CLARREO shortwave observing system simulation experiments of the twenty-first century: Simulator design and implementation

    SciTech Connect (OSTI)

    Feldman, D.R.; Algieri, C.A.; Ong, J.R.; Collins, W.D.

    2011-04-01

    Projected changes in the Earth system will likely be manifested in changes in reflected solar radiation. This paper introduces an operational Observational System Simulation Experiment (OSSE) to calculate the signals of future climate forcings and feedbacks in top-of-atmosphere reflectance spectra. The OSSE combines simulations from the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report for the NCAR Community Climate System Model (CCSM) with the MODTRAN radiative transfer code to calculate reflectance spectra for simulations of current and future climatic conditions over the 21st century. The OSSE produces narrowband reflectances and broadband fluxes, the latter of which have been extensively validated against archived CCSM results. The shortwave reflectance spectra contain atmospheric features including signals from water vapor, liquid and ice clouds, and aerosols. The spectra are also strongly influenced by the surface bidirectional reflectance properties of predicted snow and sea ice and the climatological seasonal cycles of vegetation. By comparing and contrasting simulated reflectance spectra based on emissions scenarios with increasing projected and fixed present-day greenhouse gas and aerosol concentrations, we find that prescribed forcings from increases in anthropogenic sulfate and carbonaceous aerosols are detectable and are spatially confined to lower latitudes. Also, changes in the intertropical convergence zone and poleward shifts in the subsidence zones and the storm tracks are all detectable along with large changes in snow cover and sea ice fraction. These findings suggest that the proposed NASA Climate Absolute Radiance and Refractivity Observatory (CLARREO) mission to measure shortwave reflectance spectra may help elucidate climate forcings, responses, and feedbacks.

  18. Soluc~ao dos Exercicios Capitulo 9

    E-Print Network [OSTI]

    Cipolatti, Rolci

    ) = 0. e Exerc´icio 9.5: Mostre que o sistema abaixo pode ser resolvido com: 1) x, y, u em fun¸c~ao de zSolu¸c~ao dos Exerc´icios Cap´itulo 9 Exerc´icio 9.1: Considere a superf´icie xy-z log y+eyz -e = 0¸c~ao das vari´aveis x e y uma vizinhan¸ca do ponto (0, 1). Exerc´icio 9.2: O ponto P = (1, -1, 2) pertence

  19. Parameter Estimation of Systems Described by the Relation with Noisy Observations

    E-Print Network [OSTI]

    of systems described by the equations [Bubnicki, 80a]. The problem of modeling and identification of systems

  20. SMA Observations of Class 0 Protostars: A High-Angular Resolution Survey of Protostellar Binary Systems

    E-Print Network [OSTI]

    Chen, Xuepeng; Zhang, Qizhou; Bourke, Tyler L; Launhardt, Ralf; Jorgensen, Jes K; Lee, Chin-Fee; Foster, Jonathan B; Dunham, Michael M; Pineda, Jaime E; Henning, Thomas

    2013-01-01

    We present high angular resolution 1.3 mm and 850 um dust continuum data obtained with the Submillimeter Array toward 33 Class 0 protostars in nearby clouds (distance < 500 pc), which represents so far the largest survey toward protostellar binary/multiple systems. The median angular resolution in the survey is 2.5 arcsec, while the median linear resolution is approximately 600 AU. Compact dust continuum emission is observed from all sources in the sample. Twenty-one sources in the sample show signatures of binarity/multiplicity, with separations ranging from 50 to 5000 AU. The numbers of singles, binaries, triples, and quadruples in the sample are 12, 14, 5, and 2, respectively. The derived multiplicity frequency (MF) and companion star fraction (CSF) for Class 0 protostars are 0.64+/-0.08 and 0.91+/-0.05, respectively, with no correction for completeness. The derived MF and CSF in this survey are approximately two times higher than the values found in the binary surveys toward Class I YSOs, and approxima...

  1. Systems and Algorithms for Automated Collaborative Observation using Networked Robotic Cameras 

    E-Print Network [OSTI]

    Xu, Yiliang

    2011-10-21

    The development of telerobotic systems has evolved from Single Operator Single Robot (SOSR) systems to Multiple Operator Multiple Robot (MOMR) systems. The relationship between human operators and robots follows the ...

  2. Dynamics of Satellites in Binary Near-Earth Asteroid Systems: A Study Based on Radar Observations

    E-Print Network [OSTI]

    Naidu, Shantanu

    2015-01-01

    Murray and S.F. Dermott. Solar System Dynamics. CambridgeMurray and S.F. Dermott. Solar System Dynamics. Cambridgea wide range of important solar system processes that shape

  3. Quantum Dynamical Effects as a Singular Perturbation for Observables in Open Quasi-Classical Nonlinear Mesoscopic Systems

    E-Print Network [OSTI]

    Gennady P. Berman; Fausto Borgonovi; Diego A. R. Dalvit

    2008-01-29

    We review our results on a mathematical dynamical theory for observables for open many-body quantum nonlinear bosonic systems for a very general class of Hamiltonians. We show that non-quadratic (nonlinear) terms in a Hamiltonian provide a singular "quantum" perturbation for observables in some "mesoscopic" region of parameters. In particular, quantum effects result in secular terms in the dynamical evolution, that grow in time. We argue that even for open quantum nonlinear systems in the deep quasi-classical region, these quantum effects can survive after decoherence and relaxation processes take place. We demonstrate that these quantum effects in open quantum systems can be observed, for example, in the frequency Fourier spectrum of the dynamical observables, or in the corresponding spectral density of noise. Estimates are presented for Bose-Einstein condensates, low temperature mechanical resonators, and nonlinear optical systems prepared in large amplitude coherent states. In particular, we show that for Bose-Einstein condensate systems the characteristic time of deviation of quantum dynamics for observables from the corresponding classical dynamics coincides with the characteristic time-scale of the well-known quantum nonlinear effect of phase diffusion.

  4. PROPOSTA E APLICAC~AO DE UM ALGORITMO DE LEIL~AO DESCENTRALIZADO PARA COORDENAC~AO DE M ULTIPLOS ROB^OS

    E-Print Network [OSTI]

    Chaimowicz, Luiz

    PROPOSTA E APLICA¸C~AO DE UM ALGORITMO DE LEIL~AO DESCENTRALIZADO PARA COORDENA¸C~AO DE M ´ULTIPLOS proposto um algoritmo para coordena¸c~ao de m´ultiplos rob^os. O algoritmo proposto, denominado Fully-Distribuited-Auction (FDA) ´e baseado no algoritmo de leil~ao cl´assico proposto por Bertsekas. O algoritmo FDA ´e uma

  5. Universidade de S~ao Paulo Instituto de Fsica

    E-Print Network [OSTI]

    Nussenzveig, Alberto

    ¸c~ao espectral da intensidade de um laser. . . . . . . . 12 2.2 Representa¸c~ao de um estado coerente no espa

  6. Configurac~ao do Suporte de Comunicac~ao em Ambientes

    E-Print Network [OSTI]

    Rodrigues, Luís E.T.

    ¸~ao de protocolos configur´avel, que fornece a comunicac¸~ao em grupo. Este artigo discute o papel do, mudanc¸as din^amicas e efici^encia deste tipo de sistemas, os ambientes MOO (multi-utilizador orientados

  7. How do two observers pool their knowledge about a quantum system?

    E-Print Network [OSTI]

    Kurt Jacobs

    2002-09-13

    In the theory of classical statistical inference one can derive a simple rule by which two or more observers may combine {\\em independently} obtained states of knowledge together to form a new state of knowledge, which is the state which would be possessed by someone having the combined information of both observers. Moreover, this combined state of knowledge can be found without reference to the manner in which the respective observers obtained their information. However, in this note we show that in general this is not possible for quantum states of knowledge; in order to combine two quantum states of knowledge to obtain the state resulting from the combined information of both observers, these observers must also possess information about how their respective states of knowledge were obtained. Nevertheless, we emphasize this does not preclude the possibility that a unique, well motivated rule for combining quantum states of knowledge without reference to a measurement history could be found. We examine both the direct quantum analogue of the classical problem, and that of quantum state-estimation, which corresponds to a variant in which the observers share a specific kind of prior information.

  8. Validation of the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) sea surface temperature in the

    E-Print Network [OSTI]

    Sprintall, Janet

    Validation of the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR; published 5 April 2006. [1] Satellite sea surface temperature (SST) measurements from Advanced Microwave. Sprintall, and C. Gentemann (2006), Validation of the Advanced Microwave Scanning Radiometer for the Earth

  9. Transit Timing Observations from Kepler: VII. Potentially interesting candidate systems from Fourier-based statistical tests

    SciTech Connect (OSTI)

    Steffen, Jason H.; Ford, Eric B.; Rowe, Jason F.; Fabrycky, Daniel C.; Holman, Matthew J.; Welsh, William F.; Borucki, William J.; Batalha, Natalie M.; Bryson, Steve; Caldwell, Douglas A.; Ciardi, David R.; /Caltech /NASA, Ames /SETI Inst., Mtn. View

    2012-01-01

    We analyze the deviations of transit times from a linear ephemeris for the Kepler Objects of Interest (KOI) through Quarter six (Q6) of science data. We conduct two statistical tests for all KOIs and a related statistical test for all pairs of KOIs in multi-transiting systems. These tests identify several systems which show potentially interesting transit timing variations (TTVs). Strong TTV systems have been valuable for the confirmation of planets and their mass measurements. Many of the systems identified in this study should prove fruitful for detailed TTV studies.

  10. Algebra of systems: A metalanguage for model synthesis and evaluation

    E-Print Network [OSTI]

    Koo, Benjamin H. Y.

    This paper represents system models as algebraic entities and formulates model transformation activities as algebraic operations. We call this modeling framework ldquoalgebra of systemsrdquo (AoS). To show that AoS can ...

  11. Observations of prolific transient luminous event production above a mesoscale convective system in Argentina during

    E-Print Network [OSTI]

    Cummer, Steven A.

    in Argentina during the Sprite2006 Campaign in Brazil F. T. São Sabbas,1 M. J. Taylor,2 P.D. Pautet,2 M. Bailey convective system (MCS) over Argentina, as part of the third sprite campaign in Brazil. GOES infrared (IR a mesoscale convective system in Argentina during the Sprite2006 Campaign in Brazil, J. Geophys. Res., 115, A

  12. Observations on A Technology Roadmap for Generation IV Nuclear Energy Systems: Technical Roadmap Report

    Office of Energy Efficiency and Renewable Energy (EERE)

    The development of advanced nuclear energy systems in the U.S. will depend greatly on the continued success of currently operating light water nuclear power plants and the ordering of new...

  13. Func~ao Inversa e Func~ao Implicita (Resoluc~ao Sumaria) 19 de Maio de 2009

    E-Print Network [OSTI]

    Ventura, Joana

    ) = f(x, xy) (com f : R2 R de classe C2). Exprima a derivada parcial mista F12 `a custa de derivadas g : R2 R de classe C2). Exprima as derivadas parciais de ordens 1 e 2 de F `a custa de derivadas a derivada de f g ´e a derivada direccional de f segundo dg dt . Resolu¸c~ao: Pela regra da derivada da

  14. Thicket: Construc~ao e Manutenc~ao de Multiplas Arvores numa Rede entre Pares

    E-Print Network [OSTI]

    Rodrigues, Luís E.T.

    num pequeno subconjunto de todas as ´arvores, e folha nas restantes. As m´ultiplas ´arvores permitem participantes. O principal problema que afecta este tipo de sistemas ´e o desbalanceamento na contribui¸c~ao de

  15. A Fault Observant Real-Time Embedded Design for Network-on-Chip Control Systems

    E-Print Network [OSTI]

    Young, R. Michael

    : (1) Cos- mic radiation, particularly during solar flares, (2) electric interfer- ence in harsh missions use radiation-hardened processors to avoid damage from solar radiation. An alternative approach was supported in part by NSF grants CNS-0720496 and CNS-0905181 modify logic or data in systems leading

  16. APRENDIZADO SEMI-SUPERVISIONADO MULTI-VIS~AO PARA A CLASSIFICAC ~AO DE BASES DE TEXTO

    E-Print Network [OSTI]

    Batista, Gustavo

    quando somente um pequeno conjunto de exemplos rotulados est´a dispon´ivel. Entre os algoritmos semi-supervisionados existe uma fam´ilia de algoritmos conhecidos como semi-supervisionados multi-vis~ao. Essa fam´ilia ´e composta por algoritmos que necessitam de duas ou mais vis~oes dos dados que geralmente s~ao varia¸c~oes do

  17. Tracking tropical cloud systems - Observations for the diagnosis of simulations by the Weather Research and Forecasting (WRF) Model

    SciTech Connect (OSTI)

    Vogelmann, A.M.; Lin, W.; Cialella, A.; Luke, E.; Jensen, M.; Zhang, M.

    2010-03-15

    To aid in improving model parameterizations of clouds and convection, we examine the capability of models, using explicit convection, to simulate the life cycle of tropical cloud systems in the vicinity of the ARM Tropical Western Pacific sites. The cloud life cycle is determined using a satellite cloud tracking algorithm (Boer and Ramanathan, 1997), and the statistics are compared to those of simulations using the Weather Research and Forecasting (WRF) Model. Using New York Blue, a Blue Gene/L supercomputer that is co-operated by Brookhaven and Stony Brook, simulations are run at a resolution comparable to the observations. Initial results suggest a computational paradox where, even though the size of the simulated systems are about half of that observed, their longevities are still similar. The explanation for this seeming incongruity will be explored.

  18. Observation of sub-Doppler absorption in the /Lambda-type three-level Doppler-broadened cesium system

    E-Print Network [OSTI]

    Junmin Wang; Yanhua Wang; Shubin Yan; Tao Liu; Tiancai Zhang

    2003-12-31

    Thanks to the atomic coherence in coupling laser driven atomic system, sub-Doppler absorption has been observed in Doppler-broadened cesium vapor cell via the /Lambda-type three-level scheme. The linewidth of the sub-Doppler absorption peak become narrower while the frequency detuning of coupling laser increases. The results are in agreement with the theoretical prediction by G. Vemuri et al.[PRA,Vol.53(1996) p.2842].

  19. Transit Timing Observations from Kepler: II. Confirmation of Two Multiplanet Systems via a Non-parametric Correlation Analysis

    SciTech Connect (OSTI)

    Ford, Eric B.; Fabrycky, Daniel C.; Steffen, Jason H.; Carter, Joshua A.; Fressin, Francois; Holman, Matthew J.; Lissauer, Jack J.; Moorhead, Althea V.; Morehead, Robert C.; Ragozzine, Darin; Rowe, Jason F.; /NASA, Ames /SETI Inst., Mtn. View /San Diego State U., Astron. Dept.

    2012-01-01

    We present a new method for confirming transiting planets based on the combination of transit timing variations (TTVs) and dynamical stability. Correlated TTVs provide evidence that the pair of bodies are in the same physical system. Orbital stability provides upper limits for the masses of the transiting companions that are in the planetary regime. This paper describes a non-parametric technique for quantifying the statistical significance of TTVs based on the correlation of two TTV data sets. We apply this method to an analysis of the transit timing variations of two stars with multiple transiting planet candidates identified by Kepler. We confirm four transiting planets in two multiple planet systems based on their TTVs and the constraints imposed by dynamical stability. An additional three candidates in these same systems are not confirmed as planets, but are likely to be validated as real planets once further observations and analyses are possible. If all were confirmed, these systems would be near 4:6:9 and 2:4:6:9 period commensurabilities. Our results demonstrate that TTVs provide a powerful tool for confirming transiting planets, including low-mass planets and planets around faint stars for which Doppler follow-up is not practical with existing facilities. Continued Kepler observations will dramatically improve the constraints on the planet masses and orbits and provide sensitivity for detecting additional non-transiting planets. If Kepler observations were extended to eight years, then a similar analysis could likely confirm systems with multiple closely spaced, small transiting planets in or near the habitable zone of solar-type stars.

  20. Sequential Window Diagnoser for Discrete-Event Systems Under Unreliable Observations

    SciTech Connect (OSTI)

    Wen-Chiao Lin; Humberto E. Garcia; David Thorsley; Tae-Sic Yoo

    2009-09-01

    This paper addresses the issue of counting the occurrence of special events in the framework of partiallyobserved discrete-event dynamical systems (DEDS). Developed diagnosers referred to as sequential window diagnosers (SWDs) utilize the stochastic diagnoser probability transition matrices developed in [9] along with a resetting mechanism that allows on-line monitoring of special event occurrences. To illustrate their performance, the SWDs are applied to detect and count the occurrence of special events in a particular DEDS. Results show that SWDs are able to accurately track the number of times special events occur.

  1. Compositional trends of ?-induced optical changes observed in chalcogenide glasses of binary As-S system

    SciTech Connect (OSTI)

    Shpotyuk, M.; Shpotyuk, O.; Golovchak, Roman; McCloy, John S.; Riley, Brian J.

    2014-01-23

    Compositional trends of ?-induced optical changes in chalcogenide glasses are studied with the binary As-S system. Effects of ?-irradiation and annealing are compared using the changes measured in the fundamental optical absorption edge region. It is shown that annealing near the glass transition temperature leads to bleaching of As-S glasses, while ?-irradiation leads to darkening; both depend on the glass composition and thermal history of the specimens. These results are explained in terms of competitive destruction–polymerization transformations and physical aging occurring in As-S chalcogenide glasses under the influence of ?-irradiation.

  2. EXTREME CONDITIONS IN A CLOSE ANALOG TO THE YOUNG SOLAR SYSTEM: HERSCHEL OBSERVATIONS OF ? ERIDANI

    SciTech Connect (OSTI)

    Greaves, J. S. [SUPA, Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS (United Kingdom); Sibthorpe, B.; Holland, W. S. [UK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); Acke, B.; Vandenbussche, B.; Blommaert, J. A. D. L. [Instituut voor Sterrenkunde, K. U. Leuven, Celestijnenlaan 200D, B-3001 Leuven (Belgium); Pantin, E. E. [Laboratoire AIM, CEA/DSM-CNRS-Universit Paris Diderot, IRFU/Service dAstrophysique, Bat.709, CEA-Saclay, F-91191 Gif- sur-Yvette Cedex (France); Olofsson, G.; Brandeker, A.; De Vries, B. L. [Stockholm University Astrobiology Centre, SE-106 91 Stockholm (Sweden); Dominik, C. [Astronomical Institute Anton Pannekoek, University of Amsterdam, P.O. Box 94249, 1090-GE Amsterdam (Netherlands); Barlow, M. J. [Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (United Kingdom); Bendo, G. J. [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL (United Kingdom); Dent, W. R. F. [ALMA SCO, Alonso de Cordova 3107, Vitacura, Casilla 763 0355, Santiago (Chile); Di Francesco, J. [Herzberg Astronomy and Astrophysics Programs, National Research Council of Canada, 5071 West Saanich Road, Victoria, BC, V9E 2E7 (Canada); Fridlund, M. [ESA, SRE-SA, Keplerlaan 1, NL-2201 AZ Noordwijk (Netherlands); Gear, W. K. [School of Physics and Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA (United Kingdom); Harvey, P. M. [Astronomy Department, University of Texas, Austin, TX 78712 (United States); Hogerheijde, M. R. [Leiden Observatory, Leiden University, P.O. Box 9513, 2300-RA Leiden (Netherlands); Ivison, R. J., E-mail: jsg5@st-andrews.ac.uk [Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); and others

    2014-08-10

    Far-infrared Herschel images of the ? Eridani system, seen at a fifth of the Sun's present age, resolve two belts of debris emission. Fits to the 160 ?m PACS image yield radial spans for these belts of 12-16 and 54-68 AU. The south end of the outer belt is ?10% brighter than the north end in the PACS+SPIRE images at 160, 250, and 350 ?m, indicating a pericenter glow attributable to a planet ''c''. From this asymmetry and an upper bound on the offset of the belt center, this second planet should be mildly eccentric (e{sub c} ? 0.03-0.3). Compared to the asteroid and Kuiper Belts of the young Sun, the ? Eri belts are intermediate in brightness and more similar to each other, with up to 20 km sized collisional fragments in the inner belt totaling ?5% of an Earth mass. This reservoir may feed the hot dust close to the star and could send many impactors through the Habitable Zone, especially if it is being perturbed by the suspected planet ? Eri b, at semi-major axis ?3 AU.

  3. AOS Solar 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 JEnvironmental Jump to:EAand Dalton JumpProgramInformation ALLETE, Inc.EnergyPlcAOS Solar Inc

  4. Authorizing Official (AO) | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p uBUS SERVICE SUBSIDIES AT THEEnergyAO is the Senior DOE

  5. Secc~ao de Algebra e Analise, Departamento de Matematica,

    E-Print Network [OSTI]

    Nunes, João Pimentel

    valor m´edio. II. C´alculo Diferencial em Rn Diferenciabilidade de fun¸c~oes em Rn . Derivadas variedade diferencial. Independ^encia relativamente `a parametriza¸c~ao. Aplica¸c~ao ao c´alculo deSec¸c~ao de ´Algebra e An´alise, Departamento de Matem´atica, Instituto Superior T´ecnico C´alculo

  6. MAC 412 Organizac~ao de Computadores Agosto de 2005

    E-Print Network [OSTI]

    Song, Siang Wun

    a sua evolu¸c~ao atrav´es da lista TOP500. #12;3/22 Computa¸c~ao de Alto Desempenho Medida de desempenho pode mudar :-) #12;6/22 Tr^es Brasileiros na TOP500 · Todos da Petrobr´as · Posi¸c~ao 95 - IBM x,922 TFLOPS Linpack) #12;6/22 Tr^es Brasileiros na TOP500 · Todos da Petrobr´as · Posi¸c~ao 95 - IBM x

  7. Maratona de Programac~ao ACM ICPC 2005 1 Brincadeira

    E-Print Network [OSTI]

    .c, brinca.cpp, brinca.java ou brinca.pas Alice e Beto s~ao amigos desde crian¸cas. Hoje em dia est cursa Ci^encia da Computa¸c~ao, ele decidiu mostrar a Alice sua habilidade em programa¸c~ao, escrevendo

  8. Near Infrared Observations at 1.56 m of the 2003 October 29 X10 White-Light Flare

    E-Print Network [OSTI]

    -infrared (NIR) continuum at 1.56 µm. This is the first report of a white-light flare observed in the NIR a newly developed high order adaptive optics (AO) system and a state-of-the-art NIR complex metal oxide) onboard the Solar and Heliospheric Observatory (SoHO) with the NIR continuum images. Since the NIR data

  9. Departamento de Ci^encia da Computac~ao IME-USP Segundo Semestre de 2010 MAC 115 Introduc~ao `a Computac~ao IF

    E-Print Network [OSTI]

    Kohayakawa, Yoshiharu

    calculadora mec^anica que realizava somas e subtra¸c~oes. A linguagem de programa¸c~ao Pascal (desenvolvida

  10. Correla\\c{c}\\~ao de longa-dura\\c{c}\\~ao e anal\\'ise bayesiana da evolu\\c{c}\\~ao temporal dos terremotos ao longo da falha de samambaia, nordeste do brasil

    E-Print Network [OSTI]

    de Freitas, D B; Pereira, L L S; Pedro, L S; Atanazio, M G N; Vilar, C S

    2013-01-01

    A Bayesian approach is adopted to analyze the sequence of seismic events and their magnitudes near Jo\\~ao C\\^amara which occurred mainly from 1983 to 1998 along the Samambaia fault. In this work, we choose a Bayesian model for the process of occurrence times conditional on the observed magnitude values following the same procedure suggested by Stavrakakis and Tselentis (1987). The model parameters are determined on the basis of historical and physical information. We generate posterior samples from the joint posterior distribution of the model parameters by using a variant of the Metropolis-Hastings algorithm. We use the results in a variety of ways, including the construction of pointwise posterior confidence bands for the conditional intensity of the point process as a function of time, as well as, a posterior distribuition as a function of the mean of occurrence per unit time.

  11. Suporte `a computac~ao orientada aos grupos em sistemas distribuidos tolerantes a faltas

    E-Print Network [OSTI]

    Rodrigues, Luís E.T.

    Faculdade de Ci^encias da Universidade de Lisboa e co-orientac¸~ao do Prof. Doutor Nuno Manuel de Carvalho desempenho aceit´avel sobre este tipo de redes. A grande maioria das redes de grande-escala hoje existentes s

  12. ISPS: Especificac~ao Formal de Hardware MAC 412 -Organizac~ao de Computadores

    E-Print Network [OSTI]

    Song, Siang Wun

    ´aquina, para descrever: · Estado do processador Pc · Estado da mem´oria Mp · C´alculo do endere¸co efetivo · O´ario. · Interrupt.Request vale 1 se h´a pedido de interrup¸c~ao e 0 caso contr´ario. #12;C´alculo do endere

  13. Aerosol Observing System Upgraded

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L O O D S TA I N P A T T E R N A NA LY S IDOE Office2 Aerosol

  14. Earth System Observations

    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 like submitKansas Nuclear Profile 2010Mesoscopy andSaving onEarth Day Earth Day An error4

  15. Re-visit of HST FUV observations of hot-Jupiter system HD 209458: No Si III detection and the need for COS transit observations

    E-Print Network [OSTI]

    Ballester, G E

    2015-01-01

    The discovery of OI atoms and CII ions in the upper atmosphere of HD 209458b, made with the Hubble Space Telescope Imaging Spectrograph (STIS) using the G140L grating, showed that these heavy species fill an area comparable to the planet's Roche lobe. The derived ~10% transit absorption depths require super-thermal processes and/or supersolar abundances. From subsequent Cosmic Origins Spectrograph (COS) observations, CII absorption was reported with tentative velocity signatures, and absorption by SiIII ions was also claimed in disagreement with a negative STIS G140L detection. Here, we revisit the COS dataset showing a severe limitation in the published results from having contrasted the in-transit spectrum against a stellar spectrum averaged from separate observations, at planetary phases 0.27, 0.72, and 0.49. We find variable stellar SiIII and CII emissions that were significantly depressed not only during transit but also at phase 0.27 compared to phases 0.72 and 0.49. Their respective off-transit 7.5 and...

  16. A func~ao f : R3 R definida pela express~ao

    E-Print Network [OSTI]

    Granja, Gustavo

    existam as derivadas segundo (1, 1) em (1, 1) e (-1, 1). · LE 7.29 Seja f(x, y) = xk y x2+y2 se (x, y¸c~ao do par^ametro k. · LE 7.32 Seja f(x, y) = |xy|. (a) Calcule as derivadas parciais em (0, 0). (b diferenciabilidade de f. (d) Verifique se existe derivada de f segundo o vector (1, 1) nos pontos (0, 0) e (3, 5) e

  17. Curso de posgraduac~ao em Astrofisica Prova de admiss~ao

    E-Print Network [OSTI]

    para produzir energia el´etrica consiste no funcionamento de um motor t´ermico operando entre a superf, 002603 u.m.a., ent~ao quanta energia de massa de repouso ´e convertida no decaimento? b) Em um referencial no qual o n´ucleo de 8 Be est´a inicialmente em repouso, qual ´e a energia cin´etica que cada n

  18. Testing General Relativity using Bayesian model selection: Applications to observations of gravitational waves from compact binary systems

    E-Print Network [OSTI]

    Walter Del Pozzo; John Veitch; Alberto Vecchio

    2011-01-07

    Second generation interferometric gravitational wave detectors, such as Advanced LIGO and Advanced Virgo, are expected to begin operation by 2015. Such instruments plan to reach sensitivities that will offer the unique possibility to test General Relativity in the dynamical, strong field regime and investigate departures from its predictions, in particular using the signal from coalescing binary systems. We introduce a statistical framework based on Bayesian model selection in which the Bayes factor between two competing hypotheses measures which theory is favored by the data. Probability density functions of the model parameters are then used to quantify the inference on individual parameters. We also develop a method to combine the information coming from multiple independent observations of gravitational waves, and show how much stronger inference could be. As an introduction and illustration of this framework - and a practical numerical implementation through the Monte Carlo integration technique of nested sampling - we apply it to gravitational waves from the inspiral phase of coalescing binary systems as predicted by General Relativity and a very simple alternative theory in which the graviton has a non-zero mass. This method can trivially (and should) be extended to more realistic and physically motivated theories.

  19. Ultra-high Sensitivity Wavefront Sensing for Extreme-AO Olivier Guyon

    E-Print Network [OSTI]

    Guyon, Olivier

    bright. Noise propagation will push the AO system to be optimized either for bright stars (maximize-Hartman and curvature) make a relatively inefficient use of incoming photons, especially for low order aberrations (this. For example, estimation of Tip-Tilt in a SH WFS is obtained by measuring the average of the spot centroids

  20. Modeling Chemical Reactions with Single Reactant Specie Abhyudai Singh and Jo~ao Pedro Hespanha

    E-Print Network [OSTI]

    Hespanha, João Pedro

    Modeling Chemical Reactions with Single Reactant Specie Abhyudai Singh and Jo~ao Pedro Hespanha Abstract-- A procedure for constructing approximate stochastic models for chemical reactions involving involved in a chemical reaction as the continuous state of a polynomial Stochastic Hybrid System (p

  1. EXERCICIOS MAC430 ALGORITMOS E COMPLEXIDADE DE COMPUTAC ~AO

    E-Print Network [OSTI]

    Kohayakawa, Yoshiharu

    . Os problemas e exerc´icios com data de entrega devem ser resolvidos e entregues. Estes exerc´iciosEXERC´ICIOS MAC430 ALGORITMOS E COMPLEXIDADE DE COMPUTAC¸ ~AO 2O. SEMESTRE DE 2012 Instru¸c~oes: 1 far~ao parte de sua avalia¸c~ao. 2. A entrega dos exerc´icios deve ser feita no come¸co da aula (as

  2. AO DO FLUXO DE POT ENCIA EM AMBIENTE VETORIAL USANDO

    E-Print Network [OSTI]

    Coutinho, Alvaro L. G. A.

    SOLU ¸ C ~ AO DO FLUXO DE POT â?? ENCIA EM AMBIENTE VETORIAL USANDO O M ' ETODO DO GRADIENTE BI uma redu¸c~ao no custo computacional. O algoritmo foi executado em ambiente com­ putacional vetorial¸c~ao de energia el'etrica, assim como in'umeros problemas em engenharia e ou­ tras ciâ??encias, requer

  3. Causes of variation in soil carbon simulations from CMIP5 Earth system models and comparison with observations

    E-Print Network [OSTI]

    2013-01-01

    and benchmarks in Earth system models sitivity of the Amazonand benchmarks in Earth system models Thornton, P. E. ,simulations from CMIP5 Earth system models and comparison

  4. INTRODUC¸ ˜AO `AS TRANSFORMADAS DE RADON 1. Introduç ...

    E-Print Network [OSTI]

    2003-08-11

    em 1956 quando trabalhava no departamento de radiologia do hospital Groote Schurr (o mesmo onde foi feito o primeiro transplante de coraç˜ao) na cidade do

  5. Departamento de Ci^encia da Computac~ao IME-USP MAC 115 --Introduc~ao `a Computac~ao para Ci^encias Exatas e Tecnologia

    E-Print Network [OSTI]

    Reverbel, Francisco

    ´e 16 de abril de 2007. Caixa Eletr^onico Devido ao grande n´umero de solicita¸c~oes de clientes que est a programa¸c~ao de seus caixas eletr^onicos. A nova programa¸c~ao permitir´a saques de qualquer quantia que reais como 17 c´edulas de 10 reais e 8 c´edulas de um real. O caixa eletr^onico ´e dotado de um

  6. The Autonomous Observer: A Tool for Remote Experimentation in Robotics

    E-Print Network [OSTI]

    Latombe, Jean-Claude

    { the Autonomous Observer (AO) { developed to facilitate experimentation over the Internet. The AO is a mobile the target's pose. This pose is sent over the Internet to remote users who can observe 3-D real-time graphic de Estudios Superiores de Monterrey (ITESM) in Mexico. The goal of this project was to develop

  7. Parameterized complexity of discrete morse theory Benjamin A. Burton, Thomas Lewiner, Jo~ao Paix~ao

    E-Print Network [OSTI]

    Díaz, Lorenzo J.

    -free matching N´umero de p´aginas : 21 Data de submiss~ao : December 4th , 2012 Enderec¸o eletr^onico : http

  8. Reconstruc~ao Melhorada de Dados de Resson^ancia Magnetica Usando Aproximac~ao de Ordem Baixa Baseada em Decomposic~ao

    E-Print Network [OSTI]

    Carvalho, João Luiz

    ]. As aproxima¸c~oes baseadas em redu¸c~ao de ordem a partir de DVS podem ser aplicadas tanto no espa¸co-k como ordem pelo crit´erio de Akaike (AIC) no dom´inio da imagem e no espa¸co-k, analisando-se qualitativa e a aplica¸c~ao no dom´inio da imagem, como para no espa¸co-k. (a) (b) (c) (d) Figure: (a) Imagem original

  9. Dynamics of observables and exactly solvable quantum problems: Using time-dependent density functional theory to control quantum systems

    E-Print Network [OSTI]

    Mehdi Farzanehpour; I. V. Tokatly

    2015-06-29

    We use analytic (current) density-potential maps of time-dependent (current) density functional theory (TD(C)DFT) to inverse engineer analytically solvable time-dependent quantum problems. In this approach the driving potential (the control signal) and the corresponding solution of the Schr\\"odinger equation are parametrized analytically in terms of the basic TD(C)DFT observables. We describe the general reconstruction strategy and illustrate it with a number of explicit examples. First we consider the real space one-particle dynamics driven by a time-dependent electromagnetic field and recover, from the general TDDFT reconstruction formulas, the known exact solution for a driven oscillator with a time-dependent frequency. Then we use analytic maps of the lattice TD(C)DFT to control quantum dynamics in a discrete space. As a first example we construct a time-dependent potential which generates prescribed dynamics on a tight-binding chain. Then our method is applied to the dynamics of spin-1/2 driven by a time dependent magnetic field. We design an analytic control pulse that transfers the system from the ground to excited state and vice versa. This pulse generates the spin flip thus operating as a quantum NOT gate.

  10. Causes of variation in soil carbon simulations from CMIP5 Earth system models and comparison with observations

    E-Print Network [OSTI]

    2013-01-01

    and benchmarks in Earth system models sitivity of the Amazonand benchmarks in Earth system models Thornton, P. E. ,and evaluation of an Earth-System model – HadGEM2, Geosci-

  11. RECONSTRU C~AO DE IMAGENS DE RESSON^ANCIA MAGNETICA DE FLUXO COM IMAGEAMENTO PARALELO

    E-Print Network [OSTI]

    Carvalho, João Luiz

    ¸c~oes e que s~ao menos estressantes aos paci- entes, visto que reduzem o tempo de exposi¸c~ao a uma m´aquina ano- malias no trato gastrointestinal (como elementos que n~ao foram corretamente digeridos e que est ao esqueleto, ao inv´es de colocar elementos de uma conforma¸c~ao espacial em uma chapa 2D, como fa

  12. DEVELOPMENT OF A COASTAL MARGIN OBSERVATION AND ASSESSMENT SYSTEM (CMOAS) TO CAPTURE THE EPISODIC EVENTS IN A SHALLOW BAY 

    E-Print Network [OSTI]

    Islam, Mohammad S.

    2010-07-14

    in real-time monitoring of hydrodynamic, meteorological and water quality parameters in the bay. Three different platform types used for the installation of sensor systems are: 1) Fixed Robotic, 2) Mobile, and 3) Remote. An automated profiler system...

  13. Von Neumann: suas contribuic~oes ` a Computac~ao

    E-Print Network [OSTI]

    Kohayakawa, Yoshiharu

    'isica, Meteorologia, Economia e Computa¸c~ao. Em v'arios ca­ sos as suas contribui¸c~oes foram muito al'em de solu

  14. Anomalous Eurasian snow extent and the wintertime AO

    E-Print Network [OSTI]

    Lundgren, Elizabeth Whitin

    2009-01-01

    The winter mode of the Arctic Oscillation (AO) is the dominating influence on extratropical winter climate variability in the Northern Hemisphere (NH) . The phase of the Arctic Oscillation is characterized by trends in ...

  15. Testing a Coupled Global-limited-area Data Assimilation System Using Observations from the 2004 Pacific Typhoon Season 

    E-Print Network [OSTI]

    Holt, Christina

    2012-10-19

    Tropical cyclone (TC) track and intensity forecasts have improved in recent years due to increased model resolution, improved data assimilation, and the rapid increase in the number of routinely assimilated observations ...

  16. Secc~ao de Algebra e Analise, Departamento de Matematica,

    E-Print Network [OSTI]

    Nunes, João Pimentel

    . · "Complementos de C´alculo Diferencial", L. Magalh~aes, AEIST. · "Calculus on Manifolds", M.Spivak, W.A. BenjaminSec¸c~ao de ´Algebra e An´alise, Departamento de Matem´atica, Instituto Superior T´ecnico C´alculo Diferencial e Integral II Prof. Jo~ao Pimentel Nunes Programa I. Topologia e Continuidade de Fun¸c~oes em Rn

  17. New Observations of Extra-Disk Molecular Gas in Interacting Galaxy Systems, Including a Two-Component System in Stephan's Quintet

    E-Print Network [OSTI]

    B. J. Smith; C. Struck

    2000-11-03

    We present new CO (1 - 0) observations of eleven extragalactic tails and bridges in nine interacting galaxy systems, almost doubling the number of such features with sensitive CO measurements. Eight of these eleven features were undetected in CO to very low CO/HI limits, with the most extreme case being the NGC 7714/5 bridge. This bridge contains luminous H II regions and has a very high HI column density (1.6 X 10^21 cm^-2 in the 55" CO beam), yet was undetected in CO to rms T(R)* = 2.4 mK. The HI column density is higher than standard H2 and CO self-shielding limits for solar-metallicity gas, suggesting that the gas in this bridge is metal-poor and has an enhanced N(H2)/I(CO) ratio compared to the Galactic value. Only one of the eleven features in our sample was unambiguously detected in CO, a luminous HI-rich star formation region near an optical tail in the compact group Stephan's Quintet. We detect CO at two widely separated velocities in this feature, at ~6000 km/s and ~6700 km/s. Both of these components have HI and H-alpha counterparts. These velocities correspond to those of galaxies in the group, suggesting that this gas is material that has been removed from two galaxies in the group. The CO/HI/H-alpha ratios for both components are similar to global values for spiral galaxies.

  18. IEEE TRANSACTIONS ON COMPUTER-AIDED DESIGN OF INTEGRATED CIRCUITS AND SYSTEMS, VOL. 18, NO. 11, NOVEMBER 1999 1529 Improving the Observability and Controllability

    E-Print Network [OSTI]

    Potkonjak, Miodrag

    IEEE TRANSACTIONS ON COMPUTER-AIDED DESIGN OF INTEGRATED CIRCUITS AND SYSTEMS, VOL. 18, NO. 11 design observability and controllability. To facilitate debugging, and in particular error diagnosis, we-based debugging for full design visibility and controllability. The new debugging approach introduces several

  19. MA327 -Turma Y -Algebra Linear Espacos vetoriais. Base e dimens~ao. Soma e intersec~ao.

    E-Print Network [OSTI]

    Sussner, Peter

    , ´Algebra Linear e Aplica¸c~oes, dispon´ivel em vers~ao eletr^onica (pdf) em http://www.mat.ufmg.br/ regi

  20. Transit Timing Observations from Kepler: III. Confirmation of 4 Multiple Planet Systems by a Fourier-Domain Study of Anti-correlated Transit Timing Variations

    SciTech Connect (OSTI)

    Steffen, Jason H.; /Fermilab; Fabrycky, Daniel C.; /Lick Observ.; Ford, Eric B.; /Florida U.; Carter, Joshua A.; /Harvard-Smithsonian Ctr. Astrophys.; Fressin, Francois; /Harvard-Smithsonian Ctr. Astrophys.; Holman, Matthew J.; /Harvard-Smithsonian Ctr. Astrophys.; Lissauer, Jack J.; /NASA, Ames; Rowe, Jason F.; /SETI Inst., Mtn. View /NASA, Ames; Ragozzine, Darin; /Harvard-Smithsonian Ctr. Astrophys.; Welsh, William F.; /Caltech; Borucki, William J.; /NASA, Ames /UC, Santa Barbara

    2012-01-01

    We present a method to confirm the planetary nature of objects in systems with multiple transiting exoplanet candidates. This method involves a Fourier-domain analysis of the deviations in the transit times from a constant period that result from dynamical interactions within the system. The combination of observed anticorrelations in the transit times and mass constraints from dynamical stability allow us to claim the discovery of four planetary systems, Kepler-25, Kepler-26, Kepler-27 and Kepler-28, containing eight planets and one additional planet candidate.

  1. A.O. Smith: Demonstrate Underutilized micro-CHP - 2015 Peer Review...

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

    A.O. Smith: Demonstrate Underutilized micro-CHP - 2015 Peer Review A.O. Smith: Demonstrate Underutilized micro-CHP - 2015 Peer Review Presenter: Kris Jorgensen, A.O. Smith View the...

  2. A.O. Smith Corporation Response to Preliminary Plan for Retrospective...

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

    A.O. Smith Corporation Response to Preliminary Plan for Retrospective Analysis of A.O. Smith Corporation Response to Preliminary Plan for Retrospective Analysis of A.O. Smith...

  3. 350 IEEE TRANSACTIONS ON SYSTEMS, MAN, AND CYBERNETICS, VOL. SMC-17, NO. 3, MAY/JUNE 1987 Interpreting Observations of

    E-Print Network [OSTI]

    Forbus, Kenneth D.

    , analyzing, debugging, and design- ing complex physical systems. A person operating a nuclear power plant . 2) domain-specific criteria are available for quantizing numerical data into an initial qualitative

  4. Harmonic QPOs and Thick Accretion Disk Oscillations in BL Lac Object AO 0235+164

    E-Print Network [OSTI]

    F. K. Liu; G. Zhao; Xue-Bing Wu

    2006-06-27

    Periodic outbursts are observed in many AGNs and usually explained with a supermassive black hole binary (SMBHB) scenario. However, multiple periods are observed in some AGNs and cannot be explained with it. Here we analyze the periodicity of the radio light curves of AO 0235+164 at multi-frequencies and report the discovery of six QPOs in integer ratio 1:2:3:4:5:6 of QPO frequencies, of which the second with period $P_2 = (5.46 \\pm 0.47) {\\rm yr}$ is the strongest. We fit the radio light curves and show that the initial phases of six QPOs have zero or $\\pi$ differences relative to each other. We suggest a harmonic relationship of QPOs. The centroid frequency, relative strength, harmonic relationship and relative initial phases of QPOs are independent of radio frequency. The harmonic QPOs are likely due to the quasi-periodic injection of plasma from an oscillating accretion disk into the jet. We estimate the supermassive black hole mass $M_{\\rm BH} \\simeq (4.72\\pm 2.04) \\times 10^8 M_\\odot$ and the accretion rate $\\dot{m}\\simeq 0.007$. With the knowledge of accretion disk, it implies that the inner region of accretion disk of AO 0235+164 is a radiatively inefficient accretion flow. The oscillation accretion is due to the p-mode oscillation of the thick disk probably excited by a SMBHB. The theoretical predications of fundamental oscillation frequency and the harmonics are well consistent with the observations. Harmonic QPOs would be absent when the thick disk becomes geometrically thin due to the increase of accretion rate. We discuss the observations of AO 0235+164 basing on the SMBHB-thick disk oscillation scenario.

  5. Seminario de Probabilidade Grandes desvios e aus^encia de transic~ao de

    E-Print Network [OSTI]

    Friedli, Sacha

    mais geral em mec^anica estatist´ica: sistemas unidimensionais, em geral, n~ao exibem transi¸c~ao de

  6. Collaborative Research: Focusing Attention to Improve the Performance of Citizen Science Systems -Beautiful Images and Perceptive Observers

    E-Print Network [OSTI]

    Crowston, Kevin

    Collaborative Research: Focusing Attention to Improve the Performance of Citizen Science Systems unable to replicate the successes of human pattern recognition. The growth of citizen science on the web-computational citizen science platform that combines the efforts of human classifiers with those of computational

  7. Secc~ao de Algebra e Analise, Departamento de Matematica,

    E-Print Network [OSTI]

    Nunes, João Pimentel

    corresponde a 14 semanas de aulas teoricas: I. Variedades em Rn Semana 1. Revis~ao do calculo diferencial em Editora, 1996. \\Complementos de Calculo Diferencial", L. Magalh~aes, AEIST. 1 #12; fundamentais do calculo vectorial. Semana 12. Aplicac~oes. V. Integral de Lebesgue Semana 13. Conjuntos

  8. Introduc~ao `a Analise em Rn J. Campos Ferreira

    E-Print Network [OSTI]

    Ventura, Joana

    diferencial 83 4.1 Introdu¸c~ao . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 4.2 C´alculo diferencial de primeira ordem . . . . . . . . . . . . . . . . . 86 4.3 C´alculo diferencial de ordem superior continuidade -- e abordaremos o estudo do c´alculo diferencial, bem como algumas das suas aplica¸c~oes mais

  9. FSE IPSE (2014 AO Admission) Faculty of Science and Engineering

    E-Print Network [OSTI]

    Kaji, Hajime

    ability who are grounded in science and engineering knowledge such as math in addition to humanitiesFSE IPSE (2014 AO Admission) Faculty of Science and Engineering School of Fundamental Science and Engineering School of Creative Science and Engineering School of Advanced Science and Engineering WASEDA

  10. AO14: Detection of Aircraft Emission Signatures in Atmospheric Spectra

    E-Print Network [OSTI]

    Oxford, University of

    damaging levels. NOx (NO2 and NO) are the next most abundant molecules in aircraft emissions. HighAO14: Detection of Aircraft Emission Signatures in Atmospheric Spectra Supervisors: Dr A. Dudhia emissions is both relevant and important. Aircraft emissions are analysed and NO2 is selected as the most

  11. Universidade de S~ao Paulo Instituto de Fisica

    E-Print Network [OSTI]

    Nussenzveig, Alberto

    Luz Alessandro de Sousa Villar Tese de doutorado apresentada ao Instituto de F´isica para a obten Multicolor entre Feixes Intensos de Luz. São Paulo, 2007. Tese (Doutorado) - Universidade de São Paulo. USP/IF/SBI-019/2007 #12;. Resumo Investigamos as propriedades qu^anticas dos feixes de luz produzidos

  12. IPSE (2015 AO Admission) Statement on Missing Subjects

    E-Print Network [OSTI]

    Kaji, Hajime

    IPSE (2015 AO Admission) Statement on Missing Subjects Reasons why I do not take the designated subjects for the university entrance qualification examinations and standardized tests Name in Full Date of Birth Name of Subject that I do not submit the score; Circle one Physics Chemistry I have the score

  13. ROBERTO DE BEAUCLAIR SEIXAS VISUALIZAC ~AO VOLUM ETRICA COM RAY-CASTING NUM

    E-Print Network [OSTI]

    de Figueiredo, Luiz Henrique

    ROBERTO DE BEAUCLAIR SEIXAS VISUALIZAC ~AO VOLUM ETRICA COM RAY-CASTING NUM AMBIENTE DISTRIBU IDO Beauclair Seixas Visualizac~ao Volum etrica com Ray-Casting num Ambiente Distribu do Tese apresentada ao^encia durante a fase de testes. #12;Resumo Ray-Casting e uma t ecnica muito usada em visualizac~ao volum etrica

  14. IDENTIFICAC ~AO PAPILOSC OPICA DE REC EM-NASCIDOS. Daniel Weingaertner1

    E-Print Network [OSTI]

    a obtenc¸~ao de imagens com min´ucias suficientes para a identificac¸~ao do beb^e. Impress~oes palmares e para a criac¸~ao de um sistema de identificac¸~ao autom´atico para beb^es (AFIS), e produz imagens que

  15. A performance study of an electron-tracking Compton camera with a compact system for environmental gamma-ray observation

    E-Print Network [OSTI]

    Tetsuya Mizumoto; Dai Tomono; Atsushi Takada; Toru Tanimori; Shotaro Komura; Hidetoshi Kubo; Yoshihiro Matsuoka; Yoshitaka Mizumura; Kiseki Nakamura; Shogo Nakamura; Makoto Oda; Joseph D. Parker; Tatsuya Sawano; Naoto Bando; Akira Nabetani

    2015-08-06

    An electron-tracking Compton camera (ETCC) is a detector that can determine the arrival direction and energy of incident sub-MeV/MeV gamma-ray events on an event-by-event basis. It is a hybrid detector consisting of a gaseous time projection chamber (TPC), that is the Compton-scattering target and the tracker of recoil electrons, and a position-sensitive scintillation camera that absorbs of the scattered gamma rays, to measure gamma rays in the environment from contaminated soil. To measure of environmental gamma rays from soil contaminated with radioactive cesium (Cs), we developed a portable battery-powered ETCC system with a compact readout circuit and data-acquisition system for the SMILE-II experiment. We checked the gamma-ray imaging ability and ETCC performance in the laboratory by using several gamma-ray point sources. The performance test indicates that the field of view (FoV) of the detector is about 1$\\;$sr and that the detection efficiency and angular resolution for 662$\\;$keV gamma rays from the center of the FoV is $(9.31 \\pm 0.95) \\times 10^{^-5}$ and $5.9^{\\circ} \\pm 0.6^{\\circ}$, respectively. Furthermore, the ETCC can detect 0.15$\\;\\mu\\rm{Sv/h}$ from a $^{137}$Cs gamma-ray source with a significance of 5$\\sigma$ in 13 min in the laboratory. In this paper, we report the specifications of the ETCC and the results of the performance tests. Furthermore, we discuss its potential use for environmental gamma-ray measurements.

  16. H.E.S.S. Observations of the Binary System PSR B1259-63/LS 2883 around the 2010/2011 Periastron Passage

    E-Print Network [OSTI]

    :,; Acero, F; Aharonian, F; Akhperjanian, A G; Anton, G; Balenderan, S; Balzer, A; Barnacka, A; Becherini, Y; Tjus, J Becker; Bernlöhr, K; Birsin, E; Biteau, J; Bochow, A; Boisson, C; Bolmont, J; Bordas, P; Brucker, J; Brun, F; Brun, P; Bulik, T; Carrigan, S; Casanova, S; Cerruti, M; Chadwick, P M; Chaves, R C G; Cheesebrough, A; Colafrancesco, S; Cologna, G; Conrad, J; Couturier, C; Dalton, M; Daniel, M K; Davids, I D; Degrange, B; Deil, C; deWilt, P; Dickinson, H J; Djannati-Ataï, A; Domainko, W; Drury, L O'C; Dubus, G; Dutson, K; Dyks, J; Dyrda, M; Egberts, K; Eger, P; Espigat, P; Fallon, L; Farnier, C; Fegan, S; Feinstein, F; Fernandes, M V; Fernandez, D; Fiasson, A; Fontaine, G; Förster, A; Füßling, M; Gajdus, M; Gallant, Y A; Garrigoux, T; Gast, H; Giebels, B; Glicenstein, J F; Glück, B; Göring, D; Grondin, M -H; Grudzi?ska, M; Häffner, S; Hague, J D; Hahn, J; Hampf, D; Harris, J; Heinz, S; Heinzelmann, G; Henri, G; Hermann, G; Hillert, A; Hinton, J A; Hofmann, W; Hofverberg, P; Holler, M; Horns, D; Jacholkowska, A; Jahn, C; Jamrozy, M; Jung, I; Kastendieck, M A; Katarzy?ski, K; Katz, U; Kaufmann, S; Khélifi, B; Klepser, S; Klochkov, D; Klu?niak, W; Kneiske, T; Kolitzus, D; Komin, Nu; Kosack, K; Kossakowski, R; Krayzel, F; Krüger, P P; Laffon, H; Lamanna, G; Lefaucheur, J; Lemoine-Goumard, M; Lenain, J -P; Lennarz, D; Lohse, T; Lopatin, A; Lu, C -C; Marandon, V; Marcowith, A; Masbou, J; Maurin, G; Maxted, N; Mayer, M; McComb, T J L; Medina, M C; Méhault, J; Menzler, U; Moderski, R; Mohamed, M; Moulin, E; Naumann, C L; Naumann-Godo, M; de Naurois, M; Nedbal, D; Nguyen, N; Niemiec, J; Nolan, S J; Ohm, S; Wilhelmi, E de Oña; Opitz, B; Ostrowski, M; Oya, I; Panter, M; Parsons, R D; Arribas, M Paz; Pekeur, N W; Pelletier, G; Perez, J; Petrucci, P -O; Peyaud, B; Pita, S; Pühlhofer, G; Punch, M; Quirrenbach, A; Raab, S; Raue, M; Reimer, A; Reimer, O; Renaud, M; Reyes, R de los; Rieger, F; Ripken, J; Rob, L; Rosier-Lees, S; Rowell, G; Rudak, B; Rulten, C B; Sahakian, V; Sanchez, D A; Santangelo, A; Schlickeiser, R; Schulz, A; Schwanke, U; Schwarzburg, S; Schwemmer, S; Sheidaei, F; Skilton, J L; Sol, H; Spengler, G; Stawarz, ?; Steenkamp, R; Stegmann, C; Stinzing, F; Stycz, K; Sushch, I; Szostek, A; Tavernet, J -P; Terrier, R; Tluczykont, M; Trichard, C; Valerius, K; van Eldik, C; Vasileiadis, G; Venter, C; Viana, A; Vincent, P; Völk, H J; Volpe, F; Vorobiov, S; Vorster, M; Wagner, S J; Ward, M; White, R; Wierzcholska, A; Wouters, D; Zacharias, M; Zajczyk, A; Zdziarski, A A; Zech, A; Zechlin, H -S

    2013-01-01

    Aim. In this paper we present very high energy (VHE; E>100 GeV) data from the \\gamma-ray binary system PSR B1259-63/LS 2883 taken around its periastron passage (15th of December 2010) with the High Energy Stereoscopic System (H.E.S.S.) of Cherenkov Telescopes. We aim to search for a possible TeV counterpart of the GeV flare detected by the Fermi LAT. In addition, we aim to study the current periastron passage in the context of previous observations taken at similar orbital phases, testing the repetitive behavior of the source. Methods. Observations at VHE were conducted with H.E.S.S. from 9th to 16th of January 2011. The total dataset amounts to around 6 h of observing time. Results. The source is detected in the 2011 data at a significance level of 11.5\\sigma\\ revealing an averaged integral flux above 1 TeV of (1.01 \\pm 0.18_{stat} \\pm 0.20_{sys}) \\times 10^{-12} cm^{-2}s^{-1}. The differential energy spectrum follows a power-law shape with a spectral index \\Gamma = 2.92 \\pm 0.30_{stat} \\pm 0.20_{sys} and a ...

  17. Departamento de Ci^encia da Computac~ao IME-USP MAC 110 --Introduc~ao `a Computac~ao

    E-Print Network [OSTI]

    Reverbel, Francisco

    programa deve ler um real > 0 que define a precis~ao para c´alculo de ra´izes quadradas, um inteiro n 1 e 1 2 3 1 0 -2 Figura 1: Exemplo de entrada para o programa de c´alculo de ra´izes de equa¸c~oes quadr.4142 -1.4142 Figura 2: Sa´ida correspondente `a entrada na Figura 1 1 #12;C´alculo da raiz quadrada de um

  18. Departamento de Ci^encia da Computac~ao IME-USP MAC0115 Introduc~ao `a Computac~ao para Ci^encias Exatas e Tecnologia

    E-Print Network [OSTI]

    Reverbel, Francisco

    a precis~ao para c´alculo de ra´izes quadradas, um inteiro n 1 e os coeficientes reais a, b e c de n equa entrada para o programa de c´alculo de ra´izes de equa¸c~oes quadr´aticas Raizes de Equacoes Quadraticas.4142 Figura 2: Sa´ida correspondente `a entrada na Figura 1 1 #12;C´alculo da raiz quadrada de um n´umero real

  19. Sistemas Distribuidos e Redes de Sensores Comunicac~ao em Grupo

    E-Print Network [OSTI]

    Rodriguez, Noemi

    EffortBroadcast (beb). Events: Request: bebBroadcast | m>: bcast m Indication: bebDeliver | src, m>: entrega m Properties: BEB1: Validade melhor-esfor¸co: se Pi e Pj s~ao corretos, toda msg de Pi ´e entregue por Pj BEB2: N~ao duplica¸c~ao: nenhuma msg ´e entregue mais de uma vez BEB3: N~ao-cria¸c~ao: se a msg ´e

  20. Sobre a viagem de Enrico Fermi ao Brasil em 1934

    E-Print Network [OSTI]

    Caruso, Francisco

    2014-01-01

    Enrico Fermi was one of the greater physicists of the XX century. In 1934, he gave several lectures in Brazil. Invited by Theodoro Ramos to work in S\\~ao Paulo, he preferred to stay in Rome and went to the USA in 1938. However, Fermi recommended Gleb Wataghin to come in his place. Wataghin made history in Brazil, becoming one of the first Professors of the future S\\~ao Paulo University. Besides his relevance to the History of Science, Fermi eventually leaved an indelible mark on the creation and institutionalization of national scientific research due to the indication of Wataghin. Despite this fact, very little is known about Fermi's trip to Brazil. This work tries to reconstruct the fullest possible steps of the famous Italian physicist in our lands.

  1. Secc~ao de Algebra e Analise, Departamento de Matematica,

    E-Print Network [OSTI]

    Nunes, João Pimentel

    ://www.math.ist.utl.pt/jpnunes/AMII/iarn.pdf · "C´alculo Diferencial e Integral em Rn ", G. Pires, IST Press 2012. · "Vector Calculus", J. Marsden e. · "Complementos de C´alculo Diferencial", L. Magalh~aes, AEIST. · "Calculus on Manifolds", M.Spivak, W.A. BenjaminSec¸c~ao de ´Algebra e An´alise, Departamento de Matem´atica, Instituto Superior T´ecnico C´alculo

  2. Partial Observers

    E-Print Network [OSTI]

    Thomas Marlow

    2006-10-20

    We attempt to dissolve the measurement problem using an anthropic principle which allows us to invoke rational observers. We argue that the key feature of such observers is that they are rational (we need not care whether they are `classical' or `macroscopic' for example) and thus, since quantum theory can be expressed as a rational theory of probabilistic inference, the measurement problem is not a problem.

  3. Sistema Composto para Amostragem e Gerac~ao de Luzes a partir de Mapas de Iluminac~ao

    E-Print Network [OSTI]

    de Figueiredo, Luiz Henrique

    luz representa um problema desafiador e de grande in- teresse da comunidade de computac¸~ao gr, i)Ld(p, i)|cosi|di A mesma pode ser quebrada num somat´orio sobre as fon- tes de luz da cena luzes j da j-´esima fonte de luz e Ld(p, i) = j Ld(j)(p, i). Como num ambiente real temos iluminac

  4. ARM - Surface Aerosol Observing System

    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 Comments?govInstrumentsnoaacrnBarrow, Alaska OutreachCalendarPressExtendedPre-WorkshopListStratosphere

  5. ARM - Mobile Aerosol Observing System

    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 Comments?govInstrumentsnoaacrnBarrow, Alaska Outreach HomepolarizationMeasurementsWarmingMethaneMission

  6. VOLUME 87, NUMBER 4 P HY S I CA L REV I E W L E T T ER S 23 JULY 2001 Observation of the Quantum Zeno and AntiZeno Effects in an Unstable System

    E-Print Network [OSTI]

    in an unstable system. Cold sodium atoms are trapped in a far­detuned standing wave of light that is accelerated measurement­induced suppression of the dy­ namics of a two­state driven system has been observed [15 Zeno and Anti­Zeno Effects in an Unstable System M.C. Fischer, B. Gutiérrez­Medina, and M.G. Raizen

  7. RICHARD REMPEL DE SOUZA AVALIAC~AO DE CACHES ESPECIALIZADAS PARA

    E-Print Network [OSTI]

    Hexsel, Roberto A

    Souza #12;Conte´udo 1 Introdu¸c~ao 1 2 Ambiente de Simula¸c~ao 3 2.1 Simple o projeto de sistemas embarcados, tais como consumo de energia, tamanho do circuito integrado

  8. SMIT: Uma Arquitetura Tolerante a Intrus~oes Baseada em Virtualizac~ao

    E-Print Network [OSTI]

    Correia, Miguel

    . Sistemas financeiros, de controle de gerac¸~ao e distribuic¸~ao de energia, de controle de dispositivos a necessidade de, no m´inimo, 3f + 1 r´eplicas para tolerar faltas bizantinas [Lamport et al. 1982

  9. An alise Matem atica IV Electrotecnia (excepto Telecomunica c~oes) e Gest~ao

    E-Print Network [OSTI]

    Matos, João Palhoto

    Decida se existe ou n~ao uma vizinhan#24;ca U de 0 em C e uma fun#24;c~ao anal#19;#16;tica h : U ! C tal

  10. PRIMEIRA PROVA -FI002 1. Considere a equac~ao de Schrodinger

    E-Print Network [OSTI]

    de Aguiar, Marcus A. M.

    | ~ = eiH0t/¯h | U 0 (t)| . (a) Obtenha a equa¸c~ao diferencial satisfeita por | ~ . (b) Definindo o propagador por | ~(t) ~T(t, t0)| ~(t0) , encontre a equa¸c~ao diferencial satisfeita for ~T(t, t0) e~ao necess´arios para o c´alculo da se¸c~ao de choque. Explique a depend^encia angular do problema anterior

  11. Simulac~ao de Sistemas Embarcados utilizando ArchC Andreia Aparecida Barbiero

    E-Print Network [OSTI]

    Hexsel, Roberto A

    equi- pamentos eletr^onicos. Estes produtos s~ao projetados sob restric¸~oes de recursos como energia

  12. Col^onia de Formigas: Uma Abordagem Para Resoluc~ao De Problemas De Layout

    E-Print Network [OSTI]

    Gomes, Francisco A. M.

    - pitais, minimiza¸c~ao do comprimento de fios em circuitos eletr^onicos, escalonamento de linhas de produ

  13. Acustica submarina em alta frequ^encia: teoria, simulac~ao e resultados experimentais1

    E-Print Network [OSTI]

    Jesus, Sérgio M.

    ~oes, peso, consumo de energia e custo dos equipamentos normalmente utilizados para transmiss~ao e recep sinal recebido ´e uma combina¸c~ao linear de r´eplicas atenuadas e atrasadas do sinal emitido pela fonte´oximos, as r´eplicas s~ao em grande n´umero e as atenua¸c~oes s~ao muito dif´iceis de prever e portanto o sinal

  14. Escola de Inverno de Matematica, IST, 19 de Fevereiro de 2010 Introduc~ao `a Modelac~ao Matematica em Mec^anica dos Fluidos

    E-Print Network [OSTI]

    Baia, Margarida

    ´atica em Mec^anica dos Fluidos Juha H. Videman Resumo · Revis~ao de conceitos b´asicos da mec^anica dos

  15. Detecc~ao de Intrusos Descentralizada em Redes de Sensores Sem Fio

    E-Print Network [OSTI]

    Fonseca, Rodrigo

    a partir de eventos percebidos neste ambiente. Resultados de simulac¸ ~ao apresentam uma avaliac¸~ao da de energia na rede. 1. Introduc¸~ao Redes de Sensores sem Fio (RSSFs) constituem um novo paradigma de dados e possuem recursos limitados em termos de reserva de energia, largura de banda, capacidade de

  16. AVALIAC ~AO DO MODELO DE ONDAS O modelo de onda WAVEWATCH implementado operacionalmente no CP-

    E-Print Network [OSTI]

    WWATCH-III est~ao arquivadas nas horas 0,3,6,...,21,24, e em pontos de grade com espa¸camento de 1 grau `a ob- serva¸c~ao do sat´elite. No espa¸co, aplicou-se uma interpola¸c~ao bi-c´ubica, e no tempo, uma

  17. Uma Estrategia de Navegac~ao para Rob^os Moveis em Ambientes Interiores

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    Uma Estrategia de Navegac~ao para Rob^os Moveis em Ambientes Interiores Raquel Frizera Vassallo~ao UNIVERSIDADE FEDERAL DO ESPIRITO SANTO Vitoria, ES - BRASIL Dezembro de 1998 #12;Uma Estrategia de Navegac Uma Estrategia de Navegac~ao para Rob^os Moveis em Ambientes Interiores. Vitoria] 1998 xiii, 97p., 29

  18. Reconstruc~ao de Imagens de Resson^ancia Magnetica de Fluxo com Imageamento Paralelo

    E-Print Network [OSTI]

    Carvalho, João Luiz

    deste trabalho: desenvolver algoritmos para a reconstru¸c~ao de imagens de RM utilizando imageamento; Implementar um algoritmo de reconstru¸c~ao de imagens usando a t´ecnica sensitivity encoding (SENSE). Exemplo anatomia e fisiologia do corpo humano. Estudo Espec´ifico Implementa¸c~ao de algoritmos em MATLAB para an

  19. Optimizac~ao e Algoritmos (2004/2005) Instituto Superior Tecnico Engenharia Electrotecnica e de Computadores

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    Optimiza¸c~ao e Algoritmos (2004/2005) Instituto Superior T´ecnico ­ Engenharia Electrot´ecnica e de Computadores S´erie de Problemas 4 Minimiza¸c~ao sem restri¸c~oes (algoritmos gradiente, Newton, quasi-Newton BFGS) Minimiza¸c~ao em conjuntos convexos (algoritmo gradiente condicional) Introdu

  20. Um Modelo de Gest~ao E ciente de Recursos Computacionais Marcos Castilho Renato Carmo

    E-Print Network [OSTI]

    Hexsel, Roberto A

    vez maior. A din^amica que rege a aquisi#24;c~ao de equipamentos e a contrata#24;c~ao de recursos tecnologia, e mais, as decis~oes que norteiam estas compras s~ao muitas vezes tomadas por grupos

  1. UM METODO DE OCULTAMENTO DE ERROS EM TRANSMISS~AO DE Ana Luisa de Araujo Santos

    E-Print Network [OSTI]

    de Queiroz, Ricardo L.

    Eunice, e aos meus padrinhos Cl´eia e Manuel, pela base de valores e apoio incondicional em toda a minha´em ao LPS, pela infra-estrutura, e `a CAPES, pela bolsa de mestrado, sem os quais n~ao teria sido poss

  2. Resoluc~ao Sumaria da ficha de exercicios de Mec^anica Geometrica

    E-Print Network [OSTI]

    Natário, José

    Resolu¸c~ao Sum´aria da 2a ficha de exerc´icios de Mec^anica Geom´etrica 9 de Maio de 2002 1), onde 0 0, 2 (portanto c n~ao ´e uma geod´esica). Seja V um campo vectorial paralelo ao longo de c tal

  3. Reconstruc~ao de Imagens de Resson^ancia Magnetica de Fluxo com Compressed Sensing

    E-Print Network [OSTI]

    Carvalho, João Luiz

    ; Resson^ancia magn´etica nuclear (RMN): alternativa proeminente com o potencial para um exame) reconstru¸c~ao por energia m´inima, (d) reconstru¸c~ao por CS [3]. s~ao as diferen¸cas finitas nas dire a energia do sinal esteja fortemente concentrada em

  4. Physically Observable Cryptography Silvio Micali

    E-Print Network [OSTI]

    Reyzin, Leonid

    Physically Observable Cryptography Silvio Micali Leonid Reyzin November 29, 2003 Abstract.) inherent in the physical execution of any cryptographic algorithm. Such "physical observation attacks mathematically impregnable systems. The great practicality and the inherent availability of physical attacks

  5. Observation of the Anomalously Slow (Power-Law) Relaxation of the System of Interacting Liquid Nanoclusters in the Disordered Confinement of a Random Porous Medium

    E-Print Network [OSTI]

    V. D. Borman; A. A. Belogorlov; V. N. Tronin

    2015-05-20

    The time evolution of the system of water in the Libersorb 23 (L23) disordered nanoporous medium after the complete filling at excess pressure and the subsequent removal of excess pressure has been studied. It has been found that three stages can be identified in the relaxation of the L23-water system under study. At the first stage, a portion of water at the removal of excess pressure rapidly flows out in the pressure reduction time, i.e., following a decrease in the pressure. It has been shown that, at temperatures below the dispersion transition temperature $T pressure. At the second stage of relaxation, the degree of filling ${\\theta}$ varies slowly according to a power law ${\\theta} \\sim t^{-\\alpha}$ with the exponent ${\\alpha} 10^5$ s, the formed metastable state decays, which is manifested in the transition to a power-law dependence ${\\theta}(t)$ with a larger exponent. The extrusion-time distribution function of pores has been calculated along with the time dependence of the degree of filling, which qualitatively describes the observed anomalously slow relaxation and crossover of the transition to the stage of decay with a power-law dependence ${\\theta}(t)$ with a larger exponent. It has been shown that the relaxation and decay of the metastable state of the confined nonwetting liquid at ${\\theta}>{\\theta_c}$ are attributed to the appearance of local configurations of liquid clusters in confinement and their interaction inside the infinite percolation cluster of filled pores.

  6. Extreme photo-polarimetric behaviour of the blazar AO 0235+164

    E-Print Network [OSTI]

    Sergio A. Cellone; Gustavo E. Romero; Jorge A. Combi; Josep Marti

    2007-07-17

    We present optical photo-polarimetric observations with high temporal resolution of the blazar AO 0235+164. Our data, the first to test the photo-polarimetric behaviour of this object at very short time-scales, show significant micro-variability in total flux, colour index, linear polarization degree, and position angle. Strong inter-night variations are also detected for these parameters. Although no correlation between colour index and total flux was found, our data seem to support the general bluer-when-brighter trend already known for this object. The polarization degree, in turn, shows no correlation with total flux, but a clear trend in the sense that colour index is redder (the spectrum is softer) when the measured polarization is higher.

  7. arXiv:1408.2487v2[physics.ao-ph]22Aug2014 Ising model for melt ponds on Arctic sea ice

    E-Print Network [OSTI]

    Golden, Kenneth M.

    arXiv:1408.2487v2[physics.ao-ph]22Aug2014 Ising model for melt ponds on Arctic sea ice Yi-Ping Ma,1 of water on the ice surface. Recent observations show an onset of pond complexity at a critical area modeling, we introduce a two dimensional Ising model for pond evolution which incorporates ice

  8. Observables on Quantum Structures

    E-Print Network [OSTI]

    Anatolij Dvure?enskij; Mária Kuková

    2012-04-29

    An observable on a quantum structure is any $\\sigma$-homomorphism of quantum structures from the Borel $\\sigma$-algebra into the quantum structure. We show that our partial information on an observable known only for all intervals of the form $(-\\infty,t)$ is sufficient to determine uniquely the whole observable defined on quantum structures like $\\sigma$-MV-algebras, $\\sigma$-effect algebras, Boolean $\\sigma$-algebras, monotone $\\sigma$-complete effect algebras with the Riesz Decomposition Property, the effect algebra of effect operators of a Hilbert space, and a system of functions, and an effect-tribe.

  9. Use of ARM observations and numerical models to determine radiative and latent heating profiles of mesoscale convective systems for general circulation models

    SciTech Connect (OSTI)

    Tao, Wei-Kuo; Houze, Robert, A., Jr.; Zeng, Xiping

    2013-03-14

    This three-year project, in cooperation with Professor Bob Houze at University of Washington, has been successfully finished as planned. Both ARM (the Atmospheric Radiation Measurement Program) data and cloud-resolving model (CRM) simulations were used to identify the water budgets of clouds observed in two international field campaigns. The research results achieved shed light on several key processes of clouds in climate change (or general circulation models), which are summarized below. 1. Revealed the effect of mineral dust on mesoscale convective systems (MCSs) Two international field campaigns near a desert and a tropical coast provided unique data to drive and evaluate CRM simulations, which are TWP-ICE (the Tropical Warm Pool International Cloud Experiment) and AMMA (the African Monsoon Multidisciplinary Analysis). Studies of the two campaign data were contrasted, revealing that much mineral dust can bring about large MCSs via ice nucleation and clouds. This result was reported as a PI presentation in the 3rd ASR Science Team meeting held in Arlington, Virginia in March 2012. A paper on the studies was published in the Journal of the Atmospheric Sciences (Zeng et al. 2013). 2. Identified the effect of convective downdrafts on ice crystal concentration Using the large-scale forcing data from TWP-ICE, ARM-SGP (the Southern Great Plains) and other field campaigns, Goddard CRM simulations were carried out in comparison with radar and satellite observations. The comparison between model and observations revealed that convective downdrafts could increase ice crystal concentration by up to three or four orders, which is a key to quantitatively represent the indirect effects of ice nuclei, a kind of aerosol, on clouds and radiation in the Tropics. This result was published in the Journal of the Atmospheric Sciences (Zeng et al. 2011) and summarized in the DOE/ASR Research Highlights Summaries (see http://www.arm.gov/science/highlights/RMjY5/view). 3. Used radar observations to evaluate model simulations In cooperation with Profs. Bob Houze at University of Washington and Steven Rutledge at Colorado State University, numerical model results were evaluated with observations from W- and C-band radars and CloudSat/TRMM satellites. These studies exhibited some shortcomings of current numerical models, such as too little of thin anvil clouds, directing the future improvement of cloud microphysics parameterization in CRMs. Two papers of Powell et al (2012) and Zeng et al. (2013), summarizing these studies, were published in the Journal of the Atmospheric Sciences. 4. Analyzed the water budgets of MCSs Using ARM data from TWP-ICE, ARM-SGP and other field campaigns, the Goddard CRM simulations were carried out to analyze the water budgets of clouds from TWP-ICE and AMMA. The simulations generated a set of datasets on clouds and radiation, which are available http://cloud.gsfc.nasa.gov/. The cloud datasets were available for modelers and other researchers aiming to improve the representation of cloud processes in multi-scale modeling frameworks, GCMs and climate models. Special datasets, such as 3D cloud distributions every six minutes for TWP-ICE, were requested and generated for ARM/ASR investigators. Data server records show that 86,206 datasets were downloaded by 120 users between April of 2010 and January of 2012. 5. MMF simulations The Goddard MMF (multi-scale modeling framework) has been improved by coupling with the Goddard Land Information System (LIS) and the Goddard Earth Observing System Model, Version 5 (GOES5). It has also been optimized on NASA HEC supercomputers and can be run over 4000 CPUs. The improved MMF with high horizontal resolution (1 x 1 degree) is currently being applied to cases covering 2005 and 2006. The results show that the spatial distribution pattern of precipitation rate is well simulated by the MMF through comparisons with satellite retrievals from the CMOPRH and GPCP data sets. In addition, the MMF results were compared with three reanalyses (MERRA, ERA-Interim and CFSR). Although the MMF tends

  10. Advanced chemistry-transport modeling and observing systems allow daily air quality observations, short-term forecasts, and real-time analyses of air quality at the global and

    E-Print Network [OSTI]

    Menut, Laurent

    , French legislation has been adapted in such a way that the local authorities in charge of air pollution can now inform the public and take emergency decisions re- lated to air pollution control not onlyOLOGICAL SOCIETy | #12;air quality monitoring system. In case of a pollution episode, when concentrations exceed

  11. InteGrade: Rumo a um Sistema de Computac~ao em Grade para Aproveitamento de

    E-Print Network [OSTI]

    Goldman, Alfredo

    Departamento de Ci^encia da Computa¸c~ao Instituto de Matem´atica e Estat´istica Universidade de S~ao Paulo de recursos. Pro- cessadores que hoje equipam computadores pessoais possuem capacidade de¸c~ao de Grades A id´eia de Grade transcende o uso de redes que fazemos hoje em dia. Em uma rede que se

  12. Transfer^encia de Ficheiros Baseada em Chunks com Eliminac~ao de Redund^ancia

    E-Print Network [OSTI]

    Ferreira, Paulo

    Bytes. Por exemplo, o TeraShake [1] ´e uma aplicac¸~ao para a Grid que faz simulac¸~oes de actividades s´ismicas

  13. Maratona de Programac~ao da SBC ACM ICPC 2006 1 Circuito Bioquimico Digital

    E-Print Network [OSTI]

    ´ogico que se comporta como um micro-circuito eletr^onico digital. Dependendo do estado da rea¸c~ao no recept

  14. Reconstruc~ao Paralelizada de Dados de Resson^ancia Magnetica de Fluxo em

    E-Print Network [OSTI]

    Carvalho, João Luiz

    desenvolver algoritmos r´apidos para a reconstru¸c~ao de imagens de RM, por meio do uso de n´ucleos de

  15. MAT 103 --Complementos de Matematica para Contabilidade e Administrac~ao

    E-Print Network [OSTI]

    Piccione, Paolo

    MAT 103 -- Complementos de Matem´atica para Contabilidade e Administra¸c~ao Prova 1 -- B 13 de Maio

  16. MAT 103 --Complementos de Matematica para Contabilidade e Administrac~ao

    E-Print Network [OSTI]

    Piccione, Paolo

    MAT 103 -- Complementos de Matem´atica para Contabilidade e Administra¸c~ao Prova 1 -- E 13 de Maio

  17. MAT 103 --Complementos de Matematica para Contabilidade e Administrac~ao

    E-Print Network [OSTI]

    Piccione, Paolo

    MAT 103 -- Complementos de Matem´atica para Contabilidade e Administra¸c~ao Prova 1 -- D 13 de Maio

  18. Saldo Capitalizavel e Saldo N~ao Capitalizavel: Novos Algoritmos para o Regime de Juros Simples

    E-Print Network [OSTI]

    Forger, Frank Michael

    matem´atica financeira em qualquer curso de gradua¸c~ao de economia ou de contabilidade no Brasil e como

  19. MAT 103 --Complementos de Matematica para Contabilidade e Administrac~ao

    E-Print Network [OSTI]

    Piccione, Paolo

    MAT 103 -- Complementos de Matem´atica para Contabilidade e Administra¸c~ao Prova 1 -- F 13 de Maio

  20. MAT 103 --Complementos de Matematica para Contabilidade e Administrac~ao

    E-Print Network [OSTI]

    Piccione, Paolo

    MAT 103 -- Complementos de Matem´atica para Contabilidade e Administra¸c~ao Prova 1 -- A 13 de Maio

  1. MAT 103 --Complementos de Matematica para Contabilidade e Administrac~ao

    E-Print Network [OSTI]

    Piccione, Paolo

    MAT 103 -- Complementos de Matem´atica para Contabilidade e Administra¸c~ao Prova 1 -- C 13 de Maio

  2. Resoluc~ao Sumaria da ficha de exercicios de Mec^anica Geometrica

    E-Print Network [OSTI]

    Natário, José

    Resolu¸c~ao Sum´aria da 4a ficha de exerc´icios de Mec^anica Geom´etrica 10 de Abril de 2002 1 : N TN ´e um campo vectorial normal a N ent~ao B(X, Y ), Z = - Y, XZ . Resolu¸c~ao: Come¸camos por vectorial normal a N ent~ao B(X, Y ), Z = ( XY ) , Z = XY - ( XY ) , Z = XY, Z = X · Y, Z - Y, XZ = X · 0

  3. Quantum Mechanics Without Observers

    E-Print Network [OSTI]

    W. H. Sulis

    2013-03-03

    The measurement problem and the role of observers have plagued quantum mechanics since its conception. Attempts to resolve these have introduced anthropomorphic or non-realist notions into physics. A shift of perspective based upon process theory and utilizing methods from combinatorial games, interpolation theory and complex systems theory results in a novel realist version of quantum mechanics incorporating quasi-local, nondeterministic hidden variables that are compatible with the no-hidden variable theorems and relativistic invariance, and reproduce the standard results of quantum mechanics to a high degree of accuracy without invoking observers.

  4. U.S. NO2 trends (2005–2013): EPA Air Quality System (AQS) data versus improved observations from the Ozone Monitoring Instrument (OMI)

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

    Lamsal, Lok N.; Duncan, Bryan N.; Yoshida, Yasuko; Krotkov, Nickolay A.; Pickering, Kenneth E.; Streets, David G.; Lu, Zifeng

    2015-06-01

    Emissions of nitrogen oxides (NOx) and, subsequently, atmospheric levels of nitrogen dioxide (NO2) have decreased over the U.S. due to a combination of environmental policies and technological change. Consequently, NO2 levels have decreased by 30-40% in the last decade. We quantify NO2 trends (2005-2013) over the U.S. using surface measurements from the U.S. Environmental Protection Agency (EPA) Air Quality System (AQS) and an improved tropospheric NO2 vertical column density (VCD) data product from the Ozone Monitoring Instrument (OMI) on the Aura satellite.We demonstrate that the current OMI NO2 algorithm is of sufficient maturity to allow a favorable correspondence of trendsmore »and variations in OMI and AQS data. Our trend model accounts for the non-linear dependence of NO2 concentration on emissions associated with the seasonal variation of the chemical lifetime, including the change in the amplitude of the seasonal cycle associated with the significant change in NOx emissions that occurred over the last decade. The direct relationship between observations and emissions becomes more robust when one accounts for these non-linear dependencies. We improve the OMI NO2 standard retrieval algorithm and, subsequently, the data product by using monthly vertical concentration profiles, a required algorithm input, from a high-resolution chemistry and transport model (CTM) simulation with varying emissions (2005-2013). The impact of neglecting the time-dependence of the profiles leads to errors in trend estimation, particularly in regions where emissions have changed substantially. For example, trends calculated from retrievals based on time-dependent profiles offer 18% more instances of significant trends and up to 15% larger total NO2 reduction versus the results based on profiles for 2005. Using a CTM, we explore the theoretical relation of the trends estimated from NO2 VCDs to those estimated from ground-level concentrations. The model-simulated trends in VCDs strongly correlate with those estimated from surface concentrations (r -- 0.83, N -- 355). We then explore the observed correspondence of trends estimated from OMI and AQS data. We find a significant, but slightly weaker, correspondence (i.e., r -- 0.68, N -- 208) than predicted by the model and discuss some of the important factors affecting the relationship, including known problems (e.g., NOz interferents) associated with the AQS data. This significant correspondence gives confidence in trend and surface concentration estimates from OMI VCDs for locations, such as the majority of the U.S. and globe, that are not covered by surface monitoring networks. Using our improved trend model and our enhanced OMI data product, we find that both OMI and AQS data show substantial downward trends from 2005 to 2013, with an average reduction of 38% for each over the U.S. The annual reduction rates inferred from OMI and AQS measurements are larger (#3;-4.8 ± 1.9%/yr, #3;-3.7 ± 1.5%/yr) from 2005 to 2008 than 2010 to 2013 (-#3;1.2 ± 1.2%/yr, #3;-2.1 ± 1.4%/yr). We quantify NO2 trends for major U.S. cities and power plants; the latter suggest larger negative trend (#3;-4.0 ± 1.5%/yr) between 2005 and 2008 and smaller or insignificant changes (-#3;0.5 ± 1.2%/yr) during 2010-2013.« less

  5. U.S. NO? trends (2005–2013): EPA air quality system (AQS) data versus improved observations from the Ozone Monitoring Instrument (OMI)

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

    Lamsal, Lok N.; Duncan, Bryan N.; Yoshida, Yasuko; Krotkov, Nickolay A.; Pickering, Kenneth E.; Streets, David G.; Lu, Zifeng

    2015-06-01

    Emissions of nitrogen oxides (NOx) and, subsequently, atmospheric levels of nitrogen dioxide (NO?) have decreased over the U.S. due to a combination of environmental policies and technological change. Consequently, NO? levels have decreased by 30–40% in the last decade. We quantify NO? trends (2005–2013) over the U.S. using surface measurements from the U.S. Environmental Protection Agency (EPA) Air Quality System (AQS) and an improved tropospheric NO? vertical column density (VCD) data product from the Ozone Monitoring Instrument (OMI) on the Aura satellite.We demonstrate that the current OMI NO? algorithm is of sufficient maturity to allow a favorable correspondence of trendsmore »and variations in OMI and AQS data. Our trend model accounts for the non-linear dependence of NO? concentration on emissions associated with the seasonal variation of the chemical lifetime, including the change in the amplitude of the seasonal cycle associated with the significant change in NOx emissions that occurred over the last decade. The direct relationship between observations and emissions becomes more robust when one accounts for these non-linear dependencies. We improve the OMI NO? standard retrieval algorithm and, subsequently, the data product by using monthly vertical concentration profiles, a required algorithm input, from a high-resolution chemistry and transport model (CTM) simulation with varying emissions (2005-2013). The impact of neglecting the time-dependence of the profiles leads to errors in trend estimation, particularly in regions where emissions have changed substantially. For example, trends calculated from retrievals based on time-dependent profiles offer 18% more instances of significant trends and up to 15% larger total NO? reduction versus the results based on profiles for 2005. Using a CTM, we explore the theoretical relation of the trends estimated from NO? VCDs to those estimated from ground-level concentrations. The model-simulated trends in VCDs strongly correlate with those estimated from surface concentrations (r = 0.83, N = 355). We then explore the observed correspondence of trends estimated from OMI and AQS data. We find a significant, but slightly weaker, correspondence (i.e., r = 0.68, N = 208) than predicted by the model and discuss some of the important factors affecting the relationship, including known problems (e.g., NOz interferents) associated with the AQS data. This significant correspondence gives confidence in trend and surface concentration estimates from OMI VCDs for locations, such as the majority of the U.S. and globe, that are not covered by surface monitoring networks. Using our improved trend model and our enhanced OMI data product, we find that both OMI and AQS data show substantial downward trends from 2005 to 2013, with an average reduction of 38% for each over the U.S. The annual reduction rates inferred from OMI and AQS measurements are larger (–4.8 ± 1.9%/yr, –3.7 ± 1.5%/yr) from 2005 to 2008 than 2010 to 2013 (–1.2 ± 1.2%/yr, –2.1 ± 1.4%/yr). We quantify NO? trends for major U.S. cities and power plants; the latter suggest larger negative trend (–4.0 ± 1.5%/yr) between 2005 and 2008 and smaller or insignificant changes (–0.5 ± 1.2%/yr) during 2010-2013.« less

  6. 1934 IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING, VOL. 6, NO. 4, AUGUST 2013 A Web-Based System for Classification of Remote

    E-Print Network [OSTI]

    Plaza, Antonio J.

    in many different fields. This paper describes a web-based system (available online: http://hypergim.ceta-ciemat

  7. MAC323 EXERCICIO-PROGRAMA 3 LOCALIZAC~AO DE PALAVRAS I

    E-Print Network [OSTI]

    Kohayakawa, Yoshiharu

    /6/2013 (23:55) 1. Introdu¸c~ao Nos EPs 3 e 4, voc^e far´a alguns exerc´icios simples envolvendo textos e PLN (por exemplo, dado T, determinar as senten¸cas que com- p~oe T) ser~ao resolvidos usando um

  8. Departamento de Matematica do IST, Secc~ao de Algebra e Analise Analise Matematica III

    E-Print Network [OSTI]

    Granja, Gustavo

    ´iveis na web, s~ao uma excelente introdu¸c~ao `a mat´eria. Exerc´icios Resolvidos: Na webpage da cadeira encontram-se links para listas de exerc´icios resolvidos assim como para enunciados e algumas resolu/ou exames resolvidos. (Encontram-se por vezes `a venda listas de exerc´icios resolvidos de qualidade duvi

  9. Optimizac~ao e Algoritmos (2004/2005) Instituto Superior Tecnico Engenharia Electrotecnica e de Computadores

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    Optimiza¸c~ao e Algoritmos (2004/2005) Instituto Superior T´ecnico ­ Engenharia Electrot´ecnica e subproblema nos algoritmos de optimiza¸c~ao que operam por pesquisa em linhas. Nesse contexto, dado que o

  10. Inverse Problems, Design and Optimization Symposium Jo~ao Pessoa, Brazil, August 25-27, 2010

    E-Print Network [OSTI]

    Walker, D. Greg

    Inverse Problems, Design and Optimization Symposium Jo~ao Pessoa, Brazil, August 25-27, 2010. Jorge Mechanical Engineering Institute Federal University of Itajub´a Itajub´a, MG, Brazil ariosto and Optimization Symposium Jo~ao Pessoa, Brazil, August 25-27, 2010 ## # # Thermocouples Heat source x y z Figure 1

  11. Maria de Andrade Costa e Silva Calculo de Estruturas Afins e Aplicac~ao `as

    E-Print Network [OSTI]

    Lewiner, Thomas (Thomas Lewiner)

    Maria de Andrade Costa e Silva C´alculo de Estruturas Afins e Aplica¸c~ao `as Isossuperf´icies Tese: Prof. Thomas Lewiner Rio de Janeiro Agosto de 2011 #12;Maria de Andrade Costa e Silva C´alculo de parcial do trabalho sem autoriza¸c~ao da universidade, do autor e do orientador. Maria de Andrade Costa e

  12. Classificac~ao Automatica de G^eneros Musicais Utilizando Metodos de Bagging e Boosting

    E-Print Network [OSTI]

    Kent, University of

    um estudo utilizando t´ecnicas de meta- aprendizagem para o problema de classificac¸~ao autom´atica de g^eneros musi- cais. As t´ecnicas de meta-aprendizagem utilizadas foram Bagging e Boosting. Em]. No momento, a maior parte das informac¸~oes sobre dados multim´idia s~ao classificadas e organizadas baseadas

  13. Grids Computacionais: da Computac~ao de Alto Desempenho a Servicos sob Demanda

    E-Print Network [OSTI]

    Cirne, Walfredo

    desempenho). Como con- seq¨u^encia, as tecnologias de Grids Computacionais se fundiram com Web Services e se posicionaram como uma tecnologia fundamental para computac¸~ao no s´eculo XXI. O texto a seguir descreve a evoluc¸~ao dos Grids Computacionais, cobrindo as principais tecnologias existentes, e apresentando os

  14. Performance Testing of an Off-Limb Solar Adaptive Optics System

    E-Print Network [OSTI]

    Taylor, G E; Marino, J; Rimmele, T R; McAteer, R T J

    2015-01-01

    Long-exposure spectro-polarimetry in the near-infrared is a preferred method to measure the magnetic field and other physical properties of solar prominences. In the past, it has been very difficult to observe prominences in this way with sufficient spatial resolution to fully understand their dynamical properties. Solar prominences contain highly transient structures, visible only at small spatial scales; hence they must be observed at sub-arcsecond resolution, with a high temporal cadence. An adaptive optics (AO) system capable of directly locking-on to prominence structure away from the solar limb has the potential to allow for diffraction-limited spectro-polarimetry of solar prominences. In this paper, the performance of the off-limb AO system and its expected performance, at the desired science wavelength {\\CaII} 8542A, are shown.

  15. Experimental Observation of Critical Phenomena in a Laser Light System Amir Rosen, Rafi Weill, Boris Levit, Vladimir Smulakovsky, Alexander Bekker, and Baruch Fischer

    E-Print Network [OSTI]

    Fischer, Baruch

    , Boris Levit, Vladimir Smulakovsky, Alexander Bekker, and Baruch Fischer Department of Electrical of gas-liquid and magnetic spin systems. The laser light modes provide a special nonthermodynamic many. Canonical examples are the gas-liquid-solid and magnetic spin systems. This work deals with a non

  16. What can U.S. dermatology learn from health care systems abroad? An observation of Taiwan’s system of clinical efficiency as a possible model for increased patient access to care and affordability

    E-Print Network [OSTI]

    Kamangar, Faranak; Millsop, Jillian W; Tsai, Dino; Koo, John YM

    2015-01-01

    clinics operate very efficiently with a range of 30 patientsa model of a highly efficient system to deliver adequates system of clinical efficiency as a possible model for

  17. Ultima actualizac~ao: 30/5/2003 Instituto Superior Tecnico

    E-Print Network [OSTI]

    Cannas da Silva, Ana

    + + n=1 (an cos(nx) + bn sin(nx)) . Como f(x) ´e ´impar, todos os an's s~ao 0. Quanto aos bn's, s~ao dados pela f´ormula bn = 1 -1 x sin(nx)dx = 2 1 0 x sin(nx)dx porque x sin(nx) ´e par = 2 - x cos(nx) n 1 0 + 1 0 cos(nx) n dx = - 2(-1)n n + 0 = 2(-1)n+1 n . Conclui-se que o desenvolvimento de Fourier

  18. Analysis of Cloud-resolving Simulations of a Tropical Mesoscale Convective System Observed during TWP-ICE: Vertical Fluxes and Draft Properties in Convective and Stratiform Regions

    SciTech Connect (OSTI)

    Mrowiec, Agnieszka A.; Rio, Catherine; Fridlind, Ann; Ackerman, Andrew; Del Genio, Anthony D.; Pauluis, Olivier; Varble, Adam; Fan, Jiwen

    2012-10-02

    We analyze three cloud-resolving model simulations of a strong convective event observed during the TWP-ICE campaign, differing in dynamical core, microphysical scheme or both. Based on simulated and observed radar reflectivity, simulations roughly reproduce observed convective and stratiform precipitating areas. To identify the characteristics of convective and stratiform drafts that are difficult to observe but relevant to climate model parameterization, independent vertical wind speed thresholds are calculated to capture 90% of total convective and stratiform updraft and downdraft mass fluxes. Convective updrafts are fairly consistent across simulations (likely owing to fixed large-scale forcings and surface conditions), except that hydrometeor loadings differ substantially. Convective downdraft and stratiform updraft and downdraft mass fluxes vary notably below the melting level, but share similar vertically uniform draft velocities despite differing hydrometeor loadings. All identified convective and stratiform downdrafts contain precipitation below ~10 km and nearly all updrafts are cloudy above the melting level. Cold pool properties diverge substantially in a manner that is consistent with convective downdraft mass flux differences below the melting level. Despite differences in hydrometeor loadings and cold pool properties, convective updraft and downdraft mass fluxes are linearly correlated with convective area, the ratio of ice in downdrafts to that in updrafts is ~0.5 independent of species, and the ratio of downdraft to updraft mass flux is ~0.5-0.6, which may represent a minimum evaporation efficiency under moist conditions. Hydrometeor loading in stratiform regions is found to be a fraction of hydrometeor loading in convective regions that ranges from ~10% (graupel) to ~90% (cloud ice). These findings may lead to improved convection parameterizations.

  19. Spectroscopic monitoring of the BL Lac object AO 0235+164

    E-Print Network [OSTI]

    Raiteri, C M; Capetti, A; Heidt, J; Arnaboldi, M; Magazzu`, A; 10.1051/0004-6361:20066599

    2009-01-01

    We performed optical spectroscopic monitoring of the BL Lac object AO 0235+164 (z=0.94) with the VLT and TNG telescopes from Aug. 2003 to Dec. 2004, during an extended WEBT campaign. The flux of this source is both contaminated and absorbed by a foreground galactic system at z=0.524, the stars of which can act as gravitational micro-lenses. In this period the object was in an optically faint, though variable state, and a broad Mg II emission line was visible at all epochs. The spectroscopic analysis reveals an overall variation in the Mg II line flux of a factor 1.9, while the corresponding continuum flux density changed by a factor 4.3. Most likely, the photoionising radiation can be identified with the emission component that was earlier recognised to be present as a UV-soft-X-ray bump in the source SED and that is visible in the optical domain only in very faint optical states. We estimate an upper limit to the BLR size of a few light months from the historical minimum brightness level; from this we infer ...

  20. Universidade Estadual de Campinas Faculdade de Engenharia Eletrica e de Computac~ao

    E-Print Network [OSTI]

    serem auto- organiz´aveis em torno do objetivo de minimiza¸c~ao do consumo de energia de seus neur cognitivos capazes de atuar nos mais diversos ambientes e dom´inios. Palavras-chave: intelig^encia artificial

  1. http://www.opticsinfobase.org/abstract.cfm?uri=ao-22-1-95

    National Nuclear Security Administration (NNSA)

    dust particle size measurements R. G. Pinnick, G. Fernandez, and B. D. Hinds Applied Optics, Vol. 22, Issue 1, pp. 95-102 (1983) doi:10.1364AO.22.000095 View Full Text:...

  2. Optimizac~ao e Algoritmos (2004/2005) Instituto Superior Tecnico Engenharia Electrotecnica e de Computadores

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    Optimiza¸c~ao e Algoritmos (2004/2005) Instituto Superior T´ecnico ­ Engenharia Electrot´ecnica e um mini- mizante global. Problema 6.[Algoritmos: coordenadas c´iclicas, descida de gradi- ente e

  3. Guia rapido de refer^encia da linguagem Pascal Vers~ao Free Pascal

    E-Print Network [OSTI]

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.4 Exemplo de intera¸c~ao com a m´aquina para compilar . . . . . . . . . . . 10 3.5 Erros de principal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5 Elementos b´asicos 20 5.1 S

  4. MAC 0316/5754 --Conceitos de Linguagens de Programac~ao Primeiro Semestre de 2011

    E-Print Network [OSTI]

    Reverbel, Francisco

    numa prova. O par^ametro crit ´e uma fun¸c~ao que implementa o crit´erio de c´alculo da m´edia. A fun

  5. THE FIRST OBSERVATIONS OF LOW-REDSHIFT DAMPED Ly{alpha} SYSTEMS WITH THE COSMIC ORIGINS SPECTROGRAPH: CHEMICAL ABUNDANCES AND AFFILIATED GALAXIES

    SciTech Connect (OSTI)

    Battisti, A. J.; Meiring, J. D.; Tripp, T. M. [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States); Prochaska, J. X.; Werk, J. K. [Department of Astronomy and Astrophysics, University of California Observatories-Lick Observatory, UC Santa Cruz, CA 95064 (United States); Jenkins, E. B. [Department of Astrophysical Sciences, Princeton University Observatory, Princeton, NJ 08544 (United States); Lehner, N. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Tumlinson, J.; Thom, C. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)

    2012-01-10

    We present Cosmic Origins Spectrograph (COS) measurements of metal abundances in eight 0.083 < z{sub abs} < 0.321 damped Ly{alpha} (DLA) and sub-DLA absorption systems serendipitously discovered in the COS-Halos survey. We find that these systems show a large range in metallicities, with -1.10 < [Z/H] < 0.31, similar to the spread found at higher redshifts. These low-redshift systems on average have subsolar metallicities, but do show a rise in metallicity over cosmic time when compared to higher-redshift systems. We find that the average sub-DLA metallicity is higher than the average DLA metallicity at all redshifts. Nitrogen is underabundant with respect to {alpha}-group elements in all but perhaps one of the absorbers. In some cases, [N/{alpha}] is significantly below the lowest nitrogen measurements in nearby galaxies. Systems for which depletion patterns can be studied show little, if any, depletion, which is characteristic of Milky Way halo-type gas. We also identify affiliated galaxies for three of the sub-DLAs using spectra obtained from a Keck/Low Resolution Imaging Spectrometer (LRIS). None of these sub-DLAs arise in the stellar disks of luminous galaxies; instead, these absorbers may exist in galaxy halos at impact parameters ranging from 38 to 92 kpc. Multiple galaxies are present near two of the sub-DLAs, and galaxy interactions may play a role in the dispersal of the gas. Many of these low-redshift absorbers exhibit simple kinematics, but one sub-DLA has a complicated mix of at least 13 components spread over 150 km s{sup -1}. We find three galaxies near this sub-DLA, which also suggests that galaxy interactions roil the gas. This study reinforces the view that DLAs have a variety of origins, and low-redshift studies are crucial for understanding absorber-galaxy connections.

  6. Departamento de Ci^encia da Computac~ao IME-USP MAC0122 Principios de Desenvolvimento de Algoritmos

    E-Print Network [OSTI]

    Reverbel, Francisco

    Algoritmos Poli/El´etrica, Opc¸~ao Sistemas Eletr^onicos -- Primeiro Semestre de 2010 Terceiro Exerc

  7. Von Neumann e a previs~ao num'erica de tempo e clima

    E-Print Network [OSTI]

    Kohayakawa, Yoshiharu

    von Neumann de que a Meteorologia seria uma das 'areas que mais se beneficiaria com o advento da t a Meteorologia, cuja atividade de previs~ao de tempo mais se aproximava de arte do que de ciâ??encia. Von Neumann, quando teve uma conversa com Carl­Gustav Rossby, ent~ao o l'ider mundial da Meteorologia Dinâ??amica, na

  8. O LEMA DE SELEC AO DA CURVA E O TEOREMA DE

    E-Print Network [OSTI]

    Moreira, Carlos Gustavo

    entâ?ao existe uma curva analâ??�tica p definida em [0, 1) com p(0) = 0 tal que p(t) pertence a X para arbitrariamente prâ??oximos da origem, isto â??e, 0 # fecho(U # V ), entâ?ao existe uma curva real analâ??�tica p : [0â??oximos de 0. Seja x = p(t), |t| tica deste ramo. Para cada g i , a fun

  9. Algoritmos de Coordenac~ao para Enxames de Rob^os Leandro Soriano Marcolino e Luiz Chaimowicz

    E-Print Network [OSTI]

    Chaimowicz, Luiz

    Algoritmos de Coordenac¸~ao para Enxames de Rob^os Leandro Soriano Marcolino e Luiz Chaimowicz 1 Ve algoritmos de coordenac¸~ao dis- tribu´ida que permitem a um enxame de rob^os navegar em cen´arios complexos. S~ao apresentados algoritmos para resolver dois problemas principais: (i) Nave- gar em um ambiente

  10. Uma Experi^encia de Sincronizac~ao de Bases de Dados Relacionais Utilizando SyncML

    E-Print Network [OSTI]

    Hara, Carmem Satie

    protocolo SyncML neste contexto s~ao tamb´em apresentados. 1. Introduc¸~ao O aumento do n´umero de entre uma ferramenta de gerenciamento de projetos (GP) com uma ferramenta de agenda pes- soal, esta relacionais (SGBDR) propriet´arios. O GSMS utiliza como protocolo de sincronizac¸~ao o Sync

  11. Fluctuations of fragment observables

    E-Print Network [OSTI]

    F. Gulminelli; M. D'Agostino

    2006-11-09

    This contribution presents a review of our present theoretical as well as experimental knowledge of different fluctuation observables relevant to nuclear multifragmentation. The possible connection between the presence of a fluctuation peak and the occurrence of a phase transition or a critical phenomenon is critically analyzed. Many different phenomena can lead both to the creation and to the suppression of a fluctuation peak. In particular, the role of constraints due to conservation laws and to data sorting is shown to be essential. From the experimental point of view, a comparison of the available fragmentation data reveals that there is a good agreement between different data sets of basic fluctuation observables, if the fragmenting source is of comparable size. This compatibility suggests that the fragmentation process is largely independent of the reaction mechanism (central versus peripheral collisions, symmetric versus asymmetric systems, light ions versus heavy ion induced reactions). Configurational energy fluctuations, that may give important information on the heat capacity of the fragmenting system at the freeze out stage, are not fully compatible among different data sets and require further analysis to properly account for Coulomb effects and secondary decays. Some basic theoretical questions, concerning the interplay between the dynamics of the collision and the fragmentation process, and the cluster definition in dense and hot media, are still open and are addressed at the end of the paper. A comparison with realistic models and/or a quantitative analysis of the fluctuation properties will be needed to clarify in the next future the nature of the transition observed from compound nucleus evaporation to multi-fragment production.

  12. SNR G320.4-01.2 and PSR B1509-58: New radio observations of a complex interacting system

    E-Print Network [OSTI]

    B. M. Gaensler; K. T. S. Brazier; R. N. Manchester; S. Johnston; A. J. Green

    1999-01-20

    We describe radio continuum and spectral line observations of the source G320.4-01.2 (MSH 15-52) and the coincident young pulsar B1509-58 made with the Australia Telescope Compact Array. Based on a comparison between X-ray and radio observations, we argue that the two main radio components of G320.4-01.2 are a single supernova remnant (SNR), which HI absorption indicates is at a distance of 5.2+/-1.4 kpc. A high-resolution correspondence between radio and X-rays argues that the pulsar is interacting with the SNR via an opposed pair of collimated outflows. The outflow itself is seen as an elongated X-ray feature surrounded by a highly polarized radio sheath, while the interaction with the SNR manifests itself as a ring of radio/X-ray knots within the optical nebula RCW 89. We reject the hypothesis that the pulsar outflow powers the entire RCW 89 region. SNR G320.4-01.2 and PSR B1509-58 agree in distance and in rotation measure, and appear to be interacting. We thus conclude that the two objects are associated and have an age of energy or low-mass supernova which occurred near the edge of an elongated cavity. Such a model can account for the SNR's bilateral appearance, its large apparent age, the significant offset of the pulsar from the SNR's centre and the faintness of the pulsar-powered nebula at radio wavelengths.

  13. PRECISE ESTIMATES OF THE PHYSICAL PARAMETERS FOR THE EXOPLANET SYSTEM HD 17156 ENABLED BY HUBBLE SPACE TELESCOPE FINE GUIDANCE SENSOR TRANSIT AND ASTEROSEISMIC OBSERVATIONS

    SciTech Connect (OSTI)

    Nutzman, Philip; Charbonneau, David; Holman, Matthew J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Gilliland, Ronald L.; McCullough, Peter R.; Nelan, Edmund P. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Christensen-Dalsgaard, Joergen; Kjeldsen, Hans [Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark); Brown, Timothy M., E-mail: pnutzman@cfa.harvard.edu [Las Cumbres Observatory Global Telescope, Goleta, CA 93117 (United States)

    2011-01-01

    We present observations of three distinct transits of HD 17156b obtained with the Fine Guidance Sensors on board the Hubble Space Telescope. We analyzed both the transit photometry and previously published radial velocities to find the planet-star radius ratio R{sub p} /R{sub *} = 0.07454 {+-} 0.00035, inclination i = 86.49{sup +0.24}{sub -0.20} deg, and scaled semimajor axis a/R{sub *} = 23.19{sup +0.32}{sub -0.27}. This last value translates directly to a mean stellar density determination {rho}{sub *} = 0.522{sup +0.021}{sub -0.018} g cm{sup -3}. Analysis of asteroseismology observations by the companion paper of Gilliland et al. provides a consistent but significantly refined measurement of {rho}{sub *} = 0.5308 {+-} 0.0040. We compare stellar isochrones to this density estimate and find M{sub *} = 1.275 {+-} 0.018 M{sub sun} and a stellar age of 3.37{sup +0.20}{sub -0.47} Gyr. Using this estimate of M{sub *} and incorporating the density constraint from asteroseismology, we model both the photometry and published radial velocities to estimate the planet radius R{sub p} = 1.0870 {+-} 0.0066 R{sub J} and the stellar radius R{sub *} = 1.5007 {+-} 0.0076 R{sub sun}. The planet radius is larger than that found in previous studies and consistent with theoretical models of a solar-composition gas giant of the same mass and equilibrium temperature. For the three transits, we determine the times of mid-transit to a precision of 6.2 s, 7.6 s, and 6.9 s, and the transit times for HD 17156 do not show any significant departures from a constant period. The joint analysis of transit photometry and asteroseismology presages similar studies that will be enabled by the NASA Kepler Mission.

  14. Physically Observable Cryptography Silvio Micali # Leonid Reyzin +

    E-Print Network [OSTI]

    Reyzin, Leonid

    Physically Observable Cryptography Silvio Micali # Leonid Reyzin + November 29, 2003 Abstract.) inherent in the physical execution of any cryptographic algorithm. Such ``physical observation attacks mathematically impregnable systems. The great practicality and the inherent availability of physical attacks

  15. Contrast analysis and stability on the ExAO testbed

    SciTech Connect (OSTI)

    Evans, J; Thomas, S; Gavel, D; Dillon, D; Macintosh, B

    2008-06-10

    High-contrast adaptive optics systems, such as those needed to image extrasolar planets, are known to require excellent wavefront control and diffraction suppression. The Laboratory for Adaptive Optics at UC Santa Cruz is investigating limits to high-contrast imaging in support of the Gemini Planet Imager. Previous contrast measurements were made with a simple single-opening prolate spheroid shaped pupil that produced a limited region of high-contrast, particularly when wavefront errors were corrected with the 1024-actuator Boston Micromachines MEMS deformable mirror currently in use on the testbed. A more sophisticated shaped pupil is now being used that has a much larger region of interest facilitating a better understanding of high-contrast measurements. In particular we examine the effect of heat sources in the testbed on PSF stability. We find that rms image motion scales as 0.02 {lambda}/D per watt when the heat source is near the pupil plane. As a result heat sources of greater than 5 watts should be avoided near pupil planes for GPI. The safest place to introduce heat is near a focal plane. Heat also can effect the standard deviation of the high-contrast region but in the final instrument other sources of error should be more significant.

  16. COS OBSERVATIONS OF METAL LINE AND BROAD LYMAN-{alpha} ABSORPTION IN THE MULTI-PHASE O VI AND Ne VIII SYSTEM AT z = 0.20701 TOWARD HE 0226-4110

    SciTech Connect (OSTI)

    Savage, B. D. [Department of Astronomy, University of Wisconsin-Madison, 475 North Charter Street, Madison, WI 53706 (United States); Lehner, N. [Department of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN 46556 (United States); Narayanan, A. [Indian Institute of Space Science and Technology, Thiruvananthapuram 695547, Kerala (India)

    2011-12-20

    Observations of the QSO HE 0226-4110 (z{sub em} = 0.495) with the Cosmic Origins Spectrograph (COS) from 1134 to 1796 A with a resolution of {approx}17 km s{sup -1} and signal-to-noise ratio (S/N) per resolution element of 20-40 are used to study the multi-phase absorption system at z = 0.20701 containing O VI and Ne VIII. The system was previously studied with lower S/N observations with Far-Ultraviolet Spectroscopic Explorer (FUSE) and Space Telescope Imaging Spectrograph (STIS). The COS observations provide more reliable measures of the H I and metal lines present in the system and reveal the clear presence of broad Ly{alpha} (BLA) absorption with b = 72(+13, -6) km s{sup -1} and log N(H I) = 13.87 {+-} 0.08. Detecting BLAs associated with warm gas absorbers is crucial for determining the temperature, metallicity, and total baryonic content of the absorbers. The BLA is probably recording the trace amount of thermally broadened H I in the collisionally ionized plasma with log T {approx} 5.7 that also produces the O VI and Ne VIII absorption. The total hydrogen column in the collisionally ionized gas, log N(H) {approx} 20.1, exceeds that in the cooler photoionized gas in the system by a factor of {approx}22. The oxygen abundance in the collisionally ionized gas is [O/H] = -0.89 {+-} 0.08 {+-} 0.07. The absorber probably occurs in the circumgalactic environment (halo) of a foreground L = 0.25L{sub *} disk galaxy with an impact parameter of 109 h{sub 70}{sup -1} kpc identified by Mulchaey and Chen.

  17. Use of ARM observations and numerical models to determine radiative and latent heating profiles of mesoscale convective systems for general circulation models

    SciTech Connect (OSTI)

    Houze, Jr., Robert A.

    2013-11-13

    We examined cloud radar data in monsoon climates, using cloud radars at Darwin in the Australian monsoon, on a ship in the Bay of Bengal in the South Asian monsoon, and at Niamey in the West African monsoon. We followed on with a more in-depth study of the continental MCSs over West Africa. We investigated whether the West African anvil clouds connected with squall line MCSs passing over the Niamey ARM site could be simulated in a numerical model by comparing the observed anvil clouds to anvil structures generated by the Weather Research and Forecasting (WRF) mesoscale model at high resolution using six different ice-phase microphysical schemes. We carried out further simulations with a cloud-resolving model forced by sounding network budgets over the Niamey region and over the northern Australian region. We have devoted some of the effort of this project to examining how well satellite data can determine the global breadth of the anvil cloud measurements obtained at the ARM ground sites. We next considered whether satellite data could be objectively analyzed to so that their large global measurement sets can be systematically related to the ARM measurements. Further differences were detailed between the land and ocean MCS anvil clouds by examining the interior structure of the anvils with the satellite-detected the CloudSat Cloud Profiling Radar (CPR). The satellite survey of anvil clouds in the Indo-Pacific region was continued to determine the role of MCSs in producing the cloud pattern associated with the MJO.

  18. What can U.S. dermatology learn from health care systems abroad? An observation of Taiwan’s system of clinical efficiency as a possible model for increased patient access to care and affordability

    E-Print Network [OSTI]

    Kamangar, Faranak; Millsop, Jillian W; Tsai, Dino; Koo, John YM

    2015-01-01

    it behooves us to study the Taiwan system with respect andPMID: 18723242] 4. Cheng TM. Taiwan's new national health12757273] 5. Chiang TL. Taiwan's 1995 health care reform.

  19. Resoluc~ao Sumaria da ficha de exercicios de Mec^anica Geometrica

    E-Print Network [OSTI]

    Natário, José

    Resolu¸c~ao Sum´aria da 5a ficha de exerc´icios de Mec^anica Geom´etrica 23 de Abril de 2002 1 vectorial : so(3) R3 tal que A = (A) � para todo o R3 e A so(3). Resolu¸c~ao: Se 0 -c b c 0 -a -b vectorial, uma vez que ´e claramente linear e bijectiva. ´E interessante notar que se A, B so(3), com (A

  20. 0.1 Imers"oes e submers"oes entre espa,cos de Banach. Destacamos esta se,c"ao da 0.0 pois em rela,c"ao `a imers"oes e submers"oes*

    E-Print Network [OSTI]

    Tausk, Daniel Victor

    0.1 Imers"oes e submers"oes entre espa,cos de Banach. Destacamos esta se,c"ao da 0.0 pois em rela,c"ao `a imers"oes e submers"oes* * o c'alculo em espa,cos de Banach cont'em algumas diferen teoria (i.e., a di* *ferencial das fun,c"oes e na se,c"ao seguinte o espa,co tangente `as variedades) 'e

  1. Observations & Thoughts on Controller Assessment &

    E-Print Network [OSTI]

    Harris, Thomas J.

    & Assessment Design & interpretation of monitoring & assessment methods cannot be divorced from processObservations & Thoughts on Controller Assessment & Performance Monitoring T.J. Harris Queen's University harrist@post.queensu.ca Control Systems 2004 #12;Acknowledge Contributions of NSERC Imperial Oil

  2. The GAPS Programme with HARPS-N at TNG VIII: Observations of the Rossiter-McLaughlin effect and characterisation of the transiting planetary systems HAT-P-36 and WASP-11/HAT-P-10

    E-Print Network [OSTI]

    Mancini, L; Covino, E; Raia, G; Southworth, J; Tregloan-Reed, J; Biazzo, K; Bonomo, A; Desidera, S; Lanza, A F; Maciejewski, G; Poretti, E; Sozzetti, A; Borsa, F; Bruni, I; Ciceri, S; Claudi, R; Cosentino, R; Gratton, R; Fiorenzano, A F Martinez; Lodato, G; Lorenzi, V; Marzari, F; Murabito, S; Affer, L; Bignamini, A; Bedin, L R; Boccato, C; Damasso, M; Henning, Th; Maggio, A; Micela, G; Molinari, E; Pagano, I; Piotto, G; Rainer, M; Scandariato, G; Smareglia, R; Sanchez, R Zanmar

    2015-01-01

    We determine the true and the projected obliquity of HAT-P-36 and WASP-11/HAT-P-10 systems, respectively, which are both composed of a relatively cool star and a hot-Jupiter planet. Thanks to the high-resolution spectrograph HARPS-N, we observed the Rossiter-McLaughlin effect for both the systems by acquiring precise radial-velocity measurements during planetary transit events. We also present photometric observations comprising six light curves covering five transit events, obtained using three medium-class telescopes and the telescope-defocussing technique. One transit of WASP-11/HAT-P-10 was followed contemporaneously from two observatories. The three transit light curves of HAT-P-36b show anomalies attributable to starspot complexes on the surface of the parent star, in agreement with the analysis of its spectra that indicate a moderate activity. By analysing the complete HATNet data set of HAT-P-36, we estimated the stellar rotation period by detecting a periodic photometric modulation in the light curve...

  3. Regras de Avaliac~ao de CDI-II (Leic-A, 1o s 2010/2011)

    E-Print Network [OSTI]

    Baia, Margarida

    lista bi-semanal de exerc´icios propostos. Estes exerc´icios devem ser resolvidos pelos alunos antes das prepara¸c~ao pr´evia dos exerc´icios de cada ficha, e sobre o desempenho em deter- minados exerc´icios finalizar a resolu¸c~ao dos exerc´icios, recorrendo ao docente para esclarecer eventuais d´uvidas. Em cada

  4. Um Estudo Sobre a Efetividade do Metodo de Imputac~ao Baseado no Algoritmo k-Vizinhos Mais Proximos

    E-Print Network [OSTI]

    Batista, Gustavo

    Um Estudo Sobre a Efetividade do M´etodo de Imputa¸c~ao Baseado no Algoritmo k-Vizinhos Mais Pr foi mostrado que o algoritmo k-vizinhos mais pr´oximos prov^e bons resultados comparado com outros m´etodo de imputa¸c~ao baseado no algoritmo k-vizinhos mais pr´oximos n~ao ´e capaz de superar outros m

  5. Frustum Culling Hibrido em CPU e GPU para Visualizac~ao de Modelos Massivos em Tempo Real

    E-Print Network [OSTI]

    Barbosa, Alberto

    modelos massivos, necessita-se de al- goritmos de alto desempenho, pois a quantidade de c´alculos aumenta~ao processadores origi- nalmente dedicados para c´alculos gr´aficos e s~ao altamente paralelizados. Nos ´ultimos Second ´e uma medida de perfor- mance na computac¸~ao, especialmente na ´area de c´alculos cient

  6. Engenharia de Sistemas e Informatica (ex -Eng. de Sistemas e Computac~ao)

    E-Print Network [OSTI]

    Jesus, Sérgio M.

    Engenharia de Sistemas e Inform´atica (ex - Eng. de Sistemas e Computa¸c~ao) e Engenharia F de apoio foi inicialmente escrito para o Curso de Inform´atica de Sistemas, disciplina anual de de An´alise de Circuitos dos cursos de Engenharia de Sistemas e Inform´atica e Engenharia F´isica da

  7. RSC DECISION THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL AO DECISION

    E-Print Network [OSTI]

    McLaughlin, Richard M.

    RSC DECISION THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL AO DECISION Application for Residence North Carolina law, bona fide legal residents (domiciliaries) of North Carolina are eligible for a lower are available for inspection in admissions offices. North Carolina statute (G.S. 116-143) requires: "To qualify

  8. Reconstruc~ao de Imagens de Resson^ancia Magnetica de Fluxo com Imageamento Paralelo II

    E-Print Network [OSTI]

    Carvalho, João Luiz

    pilha de epirais temporalmente resolvidas no espa¸co kx-ky-kv [2]. kv kx ky Figura: Trajet´oria no espa¸c~ao qualitativa dos resultados do SPIRiT foi realizada para os dom´inios do espa¸co e de tempo-velocidade, baseada

  9. Optimizac~ao e Algoritmos (2004/2005) Instituto Superior Tecnico Engenharia Electrotecnica e de Computadores

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    Optimiza¸c~ao e Algoritmos (2004/2005) Instituto Superior T´ecnico ­ Engenharia Electrot´ecnica e¸c~oes e com restri¸c~oes (algoritmo gradientes conjugados e de ponto interior ) Dualidade Problema 1

  10. UFPR Bacharelado em Ci^encia da Computac~ao CI064 Software Basico

    E-Print Network [OSTI]

    Hexsel, Roberto A

    ¸c~ao ro, ex e wr. (i) Qual seria o tamanho de uma tabela de p´aginas linear nesta m´aquina? (ii) mostre (ii), 1/2 dos elementos da tabela de primeiro n´ivel sejam inv´alidos. Calcule os tamanhos m´aximo e m

  11. Extended decimeter radio emission after large solar flares A.O. Benz a,*, H. Perret a

    E-Print Network [OSTI]

    California at Berkeley, University of

    by extremely intense radio emissions at decimeter wave- lengths. The radio emission continued long afterExtended decimeter radio emission after large solar flares A.O. Benz a,*, H. Perret a , P. Saint; accepted 19 September 2005 Abstract The large solar flares of October and November 2003 were accompanied

  12. LOGIN/REGISTO CATLICA DO PORTO CRIA FUNDO DE APOIO AOS ESTUDANTES

    E-Print Network [OSTI]

    Instituto de Sistemas e Robotica

    alargar o número de bolsas atribuídas aos estudantes. NOTÍCIAS ARRISCA UMA IDEIA DE NEGÓCIO E HABILITA pessoas que operam e visitam as subestações elétricas. O segundo prémio, no valor de 6 500 euros, foi, no valor de 3500 euros, foi para David Cerdeira, do IST. Com um projeto na área das Smart Grids, isto é

  13. Proxy Key Re-encapsulation Mechanism for Group Communications Chunbo Ma and Jun Ao

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    - 1 - Proxy Key Re-encapsulation Mechanism for Group Communications Chunbo Ma and Jun Ao School. China machunbo@guet.edu.cn Abstract. Many practical applications use hybrid encryption mechanism to deal scheme is poor. The key encapsulation is a crucial part in hybrid encryption mechanism, which allows

  14. AO17: Ash detection and characterisation in IASI data Candidate number: 441639

    E-Print Network [OSTI]

    Oxford, University of

    AO17: Ash detection and characterisation in IASI data Candidate number: 441639 Supervisors: Dr E. Carboni and Dr R. G. Grainger Word count: 4275 Abstract Methods for the fast detection of volcanic ash aircraft of the presence of volcanic ash. Previous methods for detecting ash can gener- ate many false

  15. AO05: Ash detection and characterisation in IASI data Candidate number: 249038

    E-Print Network [OSTI]

    Oxford, University of

    AO05: Ash detection and characterisation in IASI data Candidate number: 249038 Supervisors: Dr. E to distinguish volcanic ash from other airborne substances such as water clouds and desert dust. The method and by calculating their ratios and applying some conditions the ash affected pixels are found. A set

  16. AO18: Satellite tracking of volcanic eruption plumes using ash and Candidate number: 782932

    E-Print Network [OSTI]

    Oxford, University of

    AO18: Satellite tracking of volcanic eruption plumes using ash and SO2 Candidate number: 782932 was to study, using satel- lite images, both ash and SO2 emitted from vol- canoes during eruptions, particularly to investi- gate whether the ash and SO2 in volcanic plumes are always collocated. If not, the aim

  17. Introduc~ao a Geometria Simpletica Henrique Bursztyn e Leonardo Macarini

    E-Print Network [OSTI]

    Bursztyn, Henrique

    - mento da geometria simpl´etica ´e seu papel interdisciplinar na matem´a- tica, interagindo com topologia. Estas notas apresentam uma breve introdu¸c~ao `a geometria simpl´e- tica com foco em dois aspectos

  18. Departamento de Matematica do IST, Secc~ao de Algebra e Analise Analise Matematica III

    E-Print Network [OSTI]

    Nunes, João Pimentel

    por arcos. Teorema fundamental do c´alculo para inte- grais de linha. Conserva¸c~ao de energia mec^anica vectorial seja gradi- ante. C´alculo de fun¸c~oes potenciais. 12. Homotopia. Invari^ancia de integrais de conjuntos em estrela em R3 . Exemplo de campo solenoidal sem potencial vectorial: campo gravitacional de uma

  19. IMPLEMENTAC~AO DO CONTROLE DE ENXAMES DE ROB^OS UTILIZANDO A HIDRODIN^AMICA DE PARTICULAS SUAVIZADAS

    E-Print Network [OSTI]

    Chaimowicz, Luiz

    Chaimowicz§ Programa de P´os-Gradua¸c~ao em Engenharia El´etrica Departamento de Engenharia Eletr

  20. Electromagnetic Observables in Few-Nucleon Systems

    E-Print Network [OSTI]

    Sonia Bacca

    2012-10-10

    The electromagnetic probe is a very valuable tool to study the dynamics of few nucleons. It can be very helpful in shedding light on the not yet fully understood three-nucleon forces. We present an update on the theoretical studies of electromagnetic induced reactions, such as photo-disintegration and electron scattering off 4He. We will show that they potentially represent a tool to discriminate among three-nucleon forces. Then, we will discuss the charge radius and the nuclear electric polarizability of the 6He halo nucleus.

  1. SPACE WEATHER OBSERVING SYSTEMS: CURRENT CAPABILITIES AND

    E-Print Network [OSTI]

    Schrijver, Karel

    Coordinator for Meteorology DR. JOHN HAYES* Department of Commerce DR. FRED LEWIS* Department of Defense MR. W. RANDALL BELL Department of Energy MS. ROBIN FINEGAN* Department of Homeland Security MR. JAMES F. DEVINE* Department of the Interior MR. KENNETH HODGKINS Department of State MS. VICTORIA COX* Department

  2. Invited Paper THE EARTH OBSERVING SYSTEM

    E-Print Network [OSTI]

    Dozier, Jeff

    (with MISR). * Through their intake and emission of carbon dioxide, the primary anthropogenic greenhouse-8194-0600-7/91/$4.OO SPIE Vol. 1491 Remote Sensing of Atmospheric Chemistry(1991) / 117 Downloaded From gas, terrestrial and marine plants are a key part of the global carbon cycle. To better understand

  3. Networked Aquatic Microbial Observing Systems: An Overview

    E-Print Network [OSTI]

    2009-01-01

    waters • Sensor-equipped buoys, robotic boats and pier-and biological parameters. Buoy and robotic boat in KingCombined use of static buoy, mobile robotic boat and

  4. Glider and Autonomous Underwater Vehicle Observing Systems

    E-Print Network [OSTI]

    Griffiths, Gwyn

    + H Energy consumption per unit distance Ratio Glider/Large AUV R=0.033 R3=0.0027 R=0.05 R=0 Mbyte per hour Yes 10 Mbits per sec surface short range J Sensors discussed later J Water sampling 50

  5. JPL D-28534 Earth Observing System (EOS)

    E-Print Network [OSTI]

    .0 June 15, 2004 National Aeronautics and Space Administration Jet Propulsion Laboratory California . . . . . . . . . . . . . . . . . . . . . . 4 1.1.4 Zeeman Splitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Magnetic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.3 Tensor magnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2

  6. AN INTEGRATED GLOBAL OBSERVING SYSTEM FOR SEA

    E-Print Network [OSTI]

    and variability from observa- tional data, but it does not include attribution of the causes of climate change and Reynolds--NOAA/ National Climatic Data Center, Asheville, North Carolina; lumpkin several NOAA offices: theClimateProgramOffice(CPO)in SilverSpring,Maryland;theNational Climatic Data

  7. Glider and Autonomous Underwater Vehicle Observing Systems

    E-Print Network [OSTI]

    Griffiths, Gwyn

    .1 Performance metrics for AUV surveys Present-day limitations, for example in the energy available in autonomous of harmful algal blooms (HABs) that remains a challenge for the marine science community, not the technology changes occur over a range of time and space scales. A simple metric for estimating the information

  8. VOLUME 87, NUMBER 4 P H Y S I C A L R E V I E W L E T T E R S 23 JULY 2001 Observation of the Quantum Zeno and Anti-Zeno Effects in an Unstable System

    E-Print Network [OSTI]

    system. Our experiment consists of ultracold sodium atoms in an accelerated standing wave of light which measurement-induced suppression of the dy- namics of a two-state driven system has been observed [15 of the Quantum Zeno and Anti-Zeno Effects in an Unstable System M. C. Fischer, B. Gutiérrez-Medina, and M

  9. Exercicios-Desafio de AMIV Nota Importante: N~ao e recomendavel e e altamente desaconselhado o investimento de

    E-Print Network [OSTI]

    Natário, José

    investimento de tempo na tentativa de resolu¸c~ao destes exerc´icios por quem ainda n~ao tenha resolvido com su- cesso e relativa facilidade os exerc´icios-teste semanais e uma quantidade bastante substancial de exerc´icios

  10. Identificac~ao da Doenca de Chagas Baseada em Analise de Sinais de Variabilidade da Frequ^encia Cardiaca

    E-Print Network [OSTI]

    Carvalho, João Luiz

    varia¸c~ao (desvio padr~ao/m´edia); M´aximo intervalo RR, m´inimo intervalo RR e faixa din^amica com clareza o grupo de indiv´iduos normais do grupo de chag´asicos. Melhores resultados: Coeficiente

  11. Resoluc~ao Sumaria da 1a Ficha de Exercicios de AMIII

    E-Print Network [OSTI]

    Ventura, Joana

    (x, xy) (com f : E2 R de classe C2). Exprima a derivada parcial mista F12 `a custa de derivadas parciais : E2 R de classe C2). Exprima as derivadas parciais de ordens 1 e 2 de F `a custa de derivadas a derivada de f g ´e a derivada direccional de f segundo dg dt . Resolu¸c~ao: Pela regra da derivada da

  12. MA091 Matematica basica Aula 6 Raz~ao. Taxa. Porcentagem

    E-Print Network [OSTI]

    Gomes, Francisco A. M.

    cont´em 500 ml de l´iquido. Para preparar o suco, misturamos o concentrado com ´agua, na raz~ao 1:3. Quantos ml de ´agua devemos adicionar a 200 ml do suco concentrado? Nesse caso, qual ser´a o volume total de suco? Mistura: partes de suco partes de ´agua = 1 3 . Mistura com 200 ml de suco: 1 3 · 200 ml 200

  13. MAC-412 Organizac~ao de Computadores Lista de Exercicios No. 1

    E-Print Network [OSTI]

    Song, Siang Wun

    MAC-412 Organiza¸c~ao de Computadores Lista de Exerc´icios No. 1 · A entrega de exerc´icios pode no andar t´erreo do Bloco C. · Se voce prefere entregar por email, mande para song@ime.usp.br Pesquise na internet e responda sucintamente as quest~oes. 1. Na lista top500 de junho deste ano (consultar o site top

  14. Mori Development Team E tipu, e rea, m ng r o t ao;

    E-Print Network [OSTI]

    Hickman, Mark

    Mori Development Team MORI #12;#12;E tipu, e rea, m ng r o t ao; ko t ringa ki ng rkau a te Pkeh hei oranga m t tinana; ko t ngkau ki ng taonga a tpuna hei tikitiki m t mhunga. ko t wairua ki t Atua, nna nei ng me a katoa ­ T Apirana Ngata Sir Apirana Ngata of Ngti Porou was born in Te Araroa in 1874

  15. Calculo Diferencial e Integral II Exercicio de Aplicac~ao 6 -Mec^anica de Fluidos

    E-Print Network [OSTI]

    Natário, José

    C´alculo Diferencial e Integral II Exerc´icio de Aplica¸c~ao 6 - Mec^anica de Fluidos Um fluido ´e F = - A pn dV2, onde n ´e a normal unit´aria exterior (o integral de um campo vectorial ´e o vector qualquer campo vectorial v : R3 R3 satisfazen

  16. Spectrum of Controlling and Observing Complex Networks

    E-Print Network [OSTI]

    Yan, Gang; Barzel, Baruch; Slotine, Jean-Jacques; Liu, Yang-Yu; Barabasi, Albert-Laszlo

    2015-01-01

    Observing and controlling complex networks are of paramount interest for understanding complex physical, biological and technological systems. Recent studies have made important advances in identifying sensor or driver nodes, through which we can observe or control a complex system. Yet, the observation uncertainty induced by measurement noise and the energy cost required for control continue to be significant challenges in practical applications. Here we show that the control energy cost and the observation uncertainty vary widely in different directions of the state space. In particular, we find that if all nodes are directly driven, control is energetically feasible, as the maximum energy cost increases sublinearly with the system size. If, however, we aim to control a system by driving only a single node, control in some directions is energetically prohibitive, increasing exponentially with the system size. For the cases in between, the maximum energy decays exponentially if we increase the number of driv...

  17. Geo-neutrino Observation

    SciTech Connect (OSTI)

    Dye, S. T.; Alderman, M.; Batygov, M.; Learned, J. G.; Matsuno, S.; Mahoney, J. M.; Pakvasa, S.; Rosen, M.; Smith, S.; Varner, G.; McDonough, W. F.

    2009-12-17

    Observations of geo-neutrinos measure radiogenic heat production within the earth, providing information on the thermal history and dynamic processes of the mantle. Two detectors currently observe geo-neutrinos from underground locations. Other detection projects in various stages of development include a deep ocean observatory. This paper presents the current status of geo-neutrino observation and describes the scientific capabilities of the deep ocean observatory, with emphasis on geology and neutrino physics.

  18. Observations of LSI+61303 with Swift

    E-Print Network [OSTI]

    J. Holder; A. Falcone; D. Morris

    2007-09-18

    The TeV emitting high-mass X-ray binary system LSI+61303 was observed with the Swift satellite from early September 2006 to early January 2007. Many of these observations were contemporaneous with TeV observations. The data consist of observations on 24 separate days with durations ranging between 700s and 4700s, and partially cover 4.5 orbital periods of the binary system. We present here an analysis of the 0.2 to 10keV X-ray data from the Swift-XRT instrument. Contemporaneous optical data from UVOT are also available.

  19. Hot Pot Field Observations

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

    Lane, Michael

    2013-06-28

    Map of field observations including depressions, springs, evidence of former springs, travertine terraces and vegetation patterns. Map also contains interpretation of possible spring alignments.

  20. Hot Pot Field Observations

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

    Lane, Michael

    Map of field observations including depressions, springs, evidence of former springs, travertine terraces and vegetation patterns. Map also contains interpretation of possible spring alignments.

  1. Atomic Collapse Observed

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

    Scientists Observe Atomic Collapse State Quantum Mechanics Prediction Confirmed in Graphene Using NERSC's Hopper April 26, 2013 | Tags: Hopper, Materials Science Contact: Linda...

  2. Observing the next galactic supernova

    SciTech Connect (OSTI)

    Adams, Scott M.; Kochanek, C. S.; Beacom, John F.; Stanek, K. Z. [Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210 (United States); Vagins, Mark R. [Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 (Japan)

    2013-12-01

    No supernova (SN) in the Milky Way has been observed since the invention of the optical telescope, instruments for other wavelengths, neutrino detectors, or gravitational wave observatories. It would be a tragedy to miss the opportunity to fully characterize the next one. To aid preparations for its observations, we model the distance, extinction, and magnitude probability distributions of a successful Galactic core-collapse supernova (ccSN), its shock breakout radiation, and its massive star progenitor. We find, at very high probability (? 100%), that the next Galactic SN will easily be detectable in the near-IR and that near-IR photometry of the progenitor star very likely (? 92%) already exists in the Two Micron All Sky Survey. Most ccSNe (98%) will be easily observed in the optical, but a significant fraction (43%) will lack observations of the progenitor due to a combination of survey sensitivity and confusion. If neutrino detection experiments can quickly disseminate a likely position (?3°), we show that a modestly priced IR camera system can probably detect the shock breakout radiation pulse even in daytime (64% for the cheapest design). Neutrino experiments should seriously consider adding such systems, both for their scientific return and as an added and internal layer of protection against false triggers. We find that shock breakouts from failed ccSNe of red supergiants may be more observable than those of successful SNe due to their lower radiation temperatures. We review the process by which neutrinos from a Galactic ccSN would be detected and announced. We provide new information on the EGADS system and its potential for providing instant neutrino alerts. We also discuss the distance, extinction, and magnitude probability distributions for the next Galactic Type Ia supernova (SN Ia). Based on our modeled observability, we find a Galactic ccSN rate of 3.2{sub ?2.6}{sup +7.3} per century and a Galactic SN Ia rate of 1.4{sub ?0.8}{sup +1.4} per century for a total Galactic SN rate of 4.6{sub ?2.7}{sup +7.4} per century is needed to account for the SNe observed over the last millennium, which implies a Galactic star formation rate of 3.6{sub ?3.0}{sup +8.3} M {sub ?} yr{sup –1}.

  3. The Observer April 2003 page 3 Adaptive Optics Available at CSU Fresno Observatory

    E-Print Network [OSTI]

    Ringwald, Frederick A.

    The Observer April 2003 page 3 Adaptive Optics Available at CSU Fresno Observatory By Greg Morgan-tilt mirror continually adjusts the telescopes light cone to hold a guide star on a designated pixel an AO-7 adaptive optics device. It is just one of the many state-of-the-art instruments available

  4. Physical observability of horizons

    E-Print Network [OSTI]

    Matt Visser

    2014-11-25

    Event horizons are (generically) not physically observable. In contrast, apparent horizons (and the closely related trapping horizons) are generically physically observable --- in the sense that they can be detected by observers working in finite-size regions of spacetime. Consequently event horizons are inappropriate tools for defining astrophysical black holes, or indeed for defining any notion of evolving}black hole, (evolving either due to accretion or Hawking radiation). The only situation in which an event horizon becomes physically observable is for the very highly idealized stationary or static black holes, when the event horizon is a Killing horizon which is degenerate with the apparent and trapping horizons; and then it is the physical observability of the apparent/trapping horizons that is fundamental --- the event horizon merely comes along for the ride.

  5. Physical observability of horizons

    E-Print Network [OSTI]

    Visser, Matt

    2014-01-01

    Event horizons are (generically) not physically observable. In contrast, apparent horizons (and the closely related trapping horizons) are generically physically observable --- in the sense that they can be detected by observers working in finite-size regions of spacetime. Consequently event horizons are inappropriate tools for defining astrophysical black holes, or indeed for defining any notion of evolving}black hole, (evolving either due to accretion or Hawking radiation). The only situation in which an event horizon becomes physically observable is for the very highly idealized stationary or static black holes, when the event horizon is a Killing horizon which is degenerate with the apparent and trapping horizons; and then it is the physical observability of the apparent/trapping horizons that is fundamental --- the event horizon merely comes along for the ride.

  6. MARS OBSERVER Mission Failure

    E-Print Network [OSTI]

    Rhoads, James

    of Mars Observer Mission Failure.. ................... D-12 a. Most Probable Cause: Leakage of NT0 Through Check Valves .................................................................. D-14 b. Potential Cause: Pressure Regulator Failure....................... D-28 c. Potential Cause: Failure of a Pyro Valve Charge

  7. If physics is an information science, what is an observer?

    E-Print Network [OSTI]

    Chris Fields

    2012-02-11

    Interpretations of quantum theory have traditionally assumed a "Galilean" observer, a bare "point of view" implemented physically by a quantum system. This paper investigates the consequences of replacing such an informationally-impoverished observer with an observer that satisfies the requirements of classical automata theory, i.e. an observer that encodes sufficient prior information to identify the system being observed and recognize its acceptable states. It shows that with reasonable assumptions about the physical dynamics of information channels, the observations recorded by such an observer will display the typical characteristics predicted by quantum theory, without requiring any specific assumptions about the observer's physical implementation.

  8. AO Role-Based Training Part I, DAA Overview | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p u t y A s s iof1AGGIEAL2007-04.pdfALFSummit |forAO Role-Based

  9. An HMM-based speech synthesiser using Glottal Post-Filtering Jo~ao P. Cabral1,2

    E-Print Network [OSTI]

    Edinburgh, University of

    An HMM-based speech synthesiser using Glottal Post-Filtering Jo~ao P. Cabral1,2 , Steve Renals2 Dublin, Ireland 2 The Centre for Speech Technology Research, University of Edinburgh,UK joao.cabral

  10. Observer-based fault detection for nuclear reactors

    E-Print Network [OSTI]

    Li, Qing, 1972-

    2001-01-01

    This is a study of fault detection for nuclear reactor systems. Basic concepts are derived from fundamental theories on system observers. Different types of fault- actuator fault, sensor fault, and system dynamics fault ...

  11. Tend^encias em Matematica Aplicada e Computacional, 3, No. 1 (2002), 41-50. c Uma Publicac~ao da Sociedade Brasileira de Matematica Aplicada e Computacional.

    E-Print Network [OSTI]

    Oliveira, Aurélio R. L.

    2002-01-01

    Entradas Processo Sa´idas Manufatura M´aquinas, Mat´eria-Prima, M~ao-de-obra Fabrica¸c~ao e Montagem Produtos Tabela 1: Caracter´isticas de processos produtivos. Ap´os a identifica¸c~ao dos elementos); cada est´agio de produ¸c~ao pode conter um ou mais grupos de m´aquinas; as capacidades de cada grupo e

  12. Propagac ~ao acustica em aguas profundas na presenca de massas d'aguas de mesoescala na costa sudoeste de Portugal

    E-Print Network [OSTI]

    Jesus, Sérgio M.

    Propagac¸ ~ao ac´ustica em ´aguas profundas na presenc¸a de massas d'´aguas de mesoescala na costa trabalho baseia-se no estudo da propagac¸ ~ao sonora em ´aguas oce^anicas profundas na costa Portuguesa massa d'´agua de mesosescala. Mostraremos que tal massa d'´agua d´a origem `a um acoplamento entre dois

  13. Calculo Diferencial e Integral II Exercicio de Aplicac~ao 2 -Termodin^amica dos Gases Ideais

    E-Print Network [OSTI]

    Natário, José

    C´alculo Diferencial e Integral II Exerc´icio de Aplica¸c~ao 2 - Termodin^amica dos Gases Ideais N dV + F P dP. A Primeira Lei da Termodin^amica afirma que existe uma fun¸c~ao E : M R, dita^amicos gerais pela Segunda Lei da Termodin^amica. 2 #12;

  14. Novos algoritmos de Lagrangeano aumentado com penalidade quadratica aplicados a problemas de otimizac~ao com restric~oes de igualdade

    E-Print Network [OSTI]

    Paraná, Universidade Federal do

    Novos algoritmos de Lagrangeano aumentado com penalidade quadr´atica aplicados a problemas de novos algoritmos de Lagrangeano aumen- tado aplicados na resolu¸c~ao de problemas de programa¸c~ao n~ao linear com restri¸c~oes de igual- dade. Tais algoritmos foram inspirados em m´etodos de Lagrangeano

  15. Global Warming Observations

    E-Print Network [OSTI]

    Schofield, Jeremy

    Global Warming Observations: 1. Global temperature has been gradually rising in recent years #15 in range 8000 12000 nm { CFC's, methane and N 2 O important for global warming even though concentra- tions in concentration of \\greenhouse gases" like CO 2 What determines global temperature? Energy budget of earth: 1

  16. Selecting Observation Platforms for Optimized Anomaly Detectability under Unreliable Partial Observations

    SciTech Connect (OSTI)

    Wen-Chiao Lin; Humberto E. Garcia; Tae-Sic Yoo

    2011-06-01

    Diagnosers for keeping track on the occurrences of special events in the framework of unreliable partially observed discrete-event dynamical systems were developed in previous work. This paper considers observation platforms consisting of sensors that provide partial and unreliable observations and of diagnosers that analyze them. Diagnosers in observation platforms typically perform better as sensors providing the observations become more costly or increase in number. This paper proposes a methodology for finding an observation platform that achieves an optimal balance between cost and performance, while satisfying given observability requirements and constraints. Since this problem is generally computational hard in the framework considered, an observation platform optimization algorithm is utilized that uses two greedy heuristics, one myopic and another based on projected performances. These heuristics are sequentially executed in order to find best observation platforms. The developed algorithm is then applied to an observation platform optimization problem for a multi-unit-operation system. Results show that improved observation platforms can be found that may significantly reduce the observation platform cost but still yield acceptable performance for correctly inferring the occurrences of special events.

  17. Observations of Exoplanet Atmospheres

    E-Print Network [OSTI]

    Crossfield, Ian J M

    2015-01-01

    Detailed characterization of an extrasolar planet's atmosphere provides the best hope for distinguishing the makeup of its outer layers, and the only hope for understanding the interplay between initial composition, chemistry, dynamics & circulation, and disequilibrium processes. In recent years, some areas have seen rapid progress while developments in others have come more slowly and/or have been hotly contested. This article gives an observer's perspective on the current understanding of extrasolar planet atmospheres prior to the considerable advances expected from the next generation of observing facilities. Atmospheric processes of both transiting and directly-imaged planets are discussed, including molecular and atomic abundances, cloud properties, thermal structure, and planetary energy budgets. In the future we can expect a continuing and accelerating stream of new discoveries, which will fuel the ongoing exoplanet revolution for many years to come.

  18. Observable primordial vector modes

    E-Print Network [OSTI]

    Antony Lewis

    2004-06-04

    Primordial vector modes describe vortical fluid perturbations in the early universe. A regular solution exists with constant non-zero radiation vorticities on super-horizon scales. Baryons are tightly coupled to the photons, and the baryon velocity only decays by an order unity factor by recombination, leading to an observable CMB anisotropy signature via the Doppler effect. There is also a large B-mode CMB polarization signal, with significant power on scales larger than l~2000. This B-mode signature is distinct from that expected from tensor modes or gravitational lensing, and makes a primordial vector to scalar mode power ratio ~10^(-6) detectable. Future observations aimed at detecting large scale B-modes from gravitational waves will also be sensitive to regular vector modes at around this level.

  19. Observations on European Agriculture. 

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach)

    1911-01-01

    AS ACKICUL-I-uRAL EXPE RIMENT STATIONS bLLETIN No. 14-1 DECEMBER, 1911 Division of Chemistry Observations on European Agriculture BY G. S. FRAPS, Chemist 0 Postoffice : CULLEGE STATION; TEXAS AUSTIN. TEXAS I AUSTIN PRINTING CO:. PRINTERS... ............................................... and Conclusions 35 [Blank Page in Original Bulletin] rrvations on European Agriculture By C. S. FRAPS ie object of this Bulletin is to present such abservadons on :ulture in Europe as may offer suggestions of value to Texas - :ulturists. The writer...

  20. ARM Observations Projected

    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 OutreachProductswsicloudwsicloudden Documentation Data Management Facility PlotsProductsObservations Projected

  1. BeppoSAX observations of 3C 273

    E-Print Network [OSTI]

    Haardt, F

    1997-01-01

    We present preliminary results of BeppoSAX AO1 observations of 3C 273 performed in January 1997. We also present a close comparison with data obtained during the satellite SVP, in July 1996. On average, the AO1 flux is about a factor 2 higher than the flux detected during the SVP, and roughly on the middle of the historical X-ray flux range. Power law fits with galactic absorption to all observations yield spectral indices in the range 1.53-1.6, with the spectrum extending from 0.2 to at least up to 200 keV without any significant slope change. The broad band spectrum appears basically featureless, marking a clear difference from the SVP data, where an absorption feature at low energy and a fluorescence iron emission line are present. The lack of cold/warm matter signatures in our data may indicate that, at this "high" level of luminosity, the featureless continuum produced in a relativistic jet overwhelms any thermal and/or reprocessing component, while the two components were at least comparable during the ...

  2. Observations of Accreting Pulsars

    E-Print Network [OSTI]

    Lars Bildsten; Deepto Chakrabarty; John Chiu; Mark H. Finger; Danny T. Koh; Robert W. Nelson; Thomas A. Prince; Bradley C. Rubin; D. Matthew Scott; Mark Stollberg; Brian A. Vaughan; Colleen A. Wilson; Robert B. Wilson

    1997-07-22

    We summarize five years of continuous monitoring of accretion-powered pulsars with the Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory. Our 20-70 keV observations have determined or refined the orbital parameters of 13 binaries, discovered 5 new transient accreting pulsars, measured the pulsed flux history during outbursts of 12 transients (GRO J1744-28, 4U 0115+634, GRO J1750-27, GS 0834-430, 2S 1417-624, GRO J1948+32, EXO 2030+375, GRO J1008-57, A 0535+26, GRO J2058+42, 4U 1145-619 and A 1118-616), and also measured the accretion torque history of during outbursts of 6 of those transients whose orbital parameters were also known. We have also continuously measured the pulsed flux and spin frequency for eight persistently accreting pulsars (Her X-1, Cen X-3, Vela X-1, OAO 1657-415, GX 301-2, 4U 1626-67, 4U 1538-52, and GX 1+4). Because of their continuity and uniformity over a long baseline, BATSE observations have provided new insights into the long-term behavior of accreting magnetic stars. We have found that all accreting pulsars show stochastic variations in their spin frequencies and luminosities, including those displaying secular spin-up or spin-down on long time scales, blurring the conventional distinction between disk-fed and wind-fed binaries. Pulsed flux and accretion torque are strongly correlated in outbursts of transient accreting pulsars, but uncorrelated, or even anticorrelated, in persistent sources.

  3. VLA multifrequency observations of RS CVn binaries

    E-Print Network [OSTI]

    J. Garcia-Sanchez; J. M. Paredes; M. Ribo

    2003-03-21

    We present multiepoch Very Large Array (VLA) observations at 1.4 GHz, 4.9 GHz, 8.5 GHz and 14.9 GHz for a sample of eight RS CVn binary systems. Circular polarization measurements of these systems are also reported. Most of the fluxes observed are consistent with incoherent emission from mildly relativistic electrons. Several systems show an increase of the degree of circular polarization with increasing frequency in the optically thin regime, in conflict with predictions by gyrosynchrotron models. We observed a reversal in the sense of circular polarization with increasing frequency in three non-eclipsing systems: EI Eri, DM Uma and HD 8358. We find clear evidence for coherent plasma emission at 1.4 GHz in the quiescent spectrum of HD 8358 during the helicity reversal. The degrees of polarization of the other two systems could also be accounted for by a coherent emission process. The observations of ER Vul revealed two U-shaped flux spectra at the highest frequencies. The U-shape of the spectra may be accounted for by an optically thin gyrosynchrotron source for the low frequency part whereas the high frequency part is dominated by a thermal emission component.

  4. 27/10/2010 12:48AGU: Highlatitude geomagnetically induced current events observed on very low frequency radio wave receiver systems Page 1 of 2http://europa.agu.org/?view=article&uri=/journals/rs/rs1002/2009RS004215/2009RS004215.xml&t=

    E-Print Network [OSTI]

    Ulich, Thomas

    frequency radio wave receiver systems Page 1 of 2http://europa.agu.org/?view=article&uri=/journals/rs/rs1002/2009RS004215/2009RS004215.xml&t= Keywords radio waves induced currents geomagnetic Index Terms Ionosphere Abstract Highlatitude geomagnetically induced current events observed on very low frequency radio wave

  5. Correlation between human observer performance and model observer performance in differential phase contrast CT

    SciTech Connect (OSTI)

    Li, Ke; Garrett, John; Chen, Guang-Hong

    2013-11-15

    Purpose: With the recently expanding interest and developments in x-ray differential phase contrast CT (DPC-CT), the evaluation of its task-specific detection performance and comparison with the corresponding absorption CT under a given radiation dose constraint become increasingly important. Mathematical model observers are often used to quantify the performance of imaging systems, but their correlations with actual human observers need to be confirmed for each new imaging method. This work is an investigation of the effects of stochastic DPC-CT noise on the correlation of detection performance between model and human observers with signal-known-exactly (SKE) detection tasks.Methods: The detectabilities of different objects (five disks with different diameters and two breast lesion masses) embedded in an experimental DPC-CT noise background were assessed using both model and human observers. The detectability of the disk and lesion signals was then measured using five types of model observers including the prewhitening ideal observer, the nonprewhitening (NPW) observer, the nonprewhitening observer with eye filter and internal noise (NPWEi), the prewhitening observer with eye filter and internal noise (PWEi), and the channelized Hotelling observer (CHO). The same objects were also evaluated by four human observers using the two-alternative forced choice method. The results from the model observer experiment were quantitatively compared to the human observer results to assess the correlation between the two techniques.Results: The contrast-to-detail (CD) curve generated by the human observers for the disk-detection experiments shows that the required contrast to detect a disk is inversely proportional to the square root of the disk size. Based on the CD curves, the ideal and NPW observers tend to systematically overestimate the performance of the human observers. The NPWEi and PWEi observers did not predict human performance well either, as the slopes of their CD curves tended to be steeper. The CHO generated the best quantitative agreement with human observers with its CD curve overlapping with that of human observer. Statistical equivalence between CHO and humans can be claimed within 11% of the human observer results, including both the disk and lesion detection experiments.Conclusions: The model observer method can be used to accurately represent human observer performance with the stochastic DPC-CT noise for SKE tasks with sizes ranging from 8 to 128 pixels. The incorporation of the anatomical noise remains to be studied.

  6. 0.2 C'alculo em variedades de Banach. Come,camos definindo o conceito de variedade de Banach. A defini,c"ao 'e t*

    E-Print Network [OSTI]

    Tausk, Daniel Victor

    M 'e uma trinca (U, ', E) onde U M 'e um subconjunto, E 'e um espa,co de Banach e ' : U ! "U'e uma qualquer, como * *foi explicado acima. Se os espa,cos E que aparecem nas cartas (U, ', E) 2 A s"ao to* *dos espa,cos de Hilbert ent"ao dizemos que M 'e uma variedade de Hilbert. Observa,c"ao: A rigor, o

  7. Numerical Model Construction with Closed Observables

    E-Print Network [OSTI]

    Felix Dietrich; Gerta Köster; Hans-Joachim Bungartz

    2015-10-18

    Performing analysis, optimization and control using simulations of many-particle systems is computationally demanding when no macroscopic model for the dynamics of the variables of interest is available. In case observations on the macroscopic scale can only be produced via legacy simulator code or live experiments, finding a model for these macroscopic variables is challenging. In this paper, we employ time-lagged embedding theory to construct macroscopic numerical models from output data of a black box, such as a simulator or live experiments. Since the state space variables of the constructed, coarse model are dynamically closed and observable by an observation function, we call these variables closed observables. The approach is an online-offline procedure, as model construction from observation data is performed offline and the new model can then be used in an online phase, independent of the original. We illustrate the theoretical findings with numerical models constructed from time series of a two-dimensional ordinary differential equation system, and from the density evolution of a transport-diffusion system. Applicability is demonstrated in a real-world example, where passengers leave a train and the macroscopic model for the density flow onto the platform is constructed with our approach. If only the macroscopic variables are of interest, simulation runtimes with the numerical model are three orders of magnitude lower compared to simulations with the original fine scale model. We conclude with a brief discussion of possibilities of numerical model construction in systematic upscaling, network optimization and uncertainty quantification.

  8. Pol ticas de Hand-o com Balanceamento de Carga para Computa c~ao A. Santiago, A. Goldman

    E-Print Network [OSTI]

    Goldman, Alfredo

    Pol#19;#16;ticas de Hand-o#11; com Balanceamento de Carga para Computa#24;c~ao M#19;ovel A pro- pomos novas pol#19;#16;ticas onde o hand-o#11; tamb#19;em pode ser realizado por iniciativa das

  9. Ata da reunio da Comisso Prpria de Avaliao, realizada em 04 de dezembro de1 2012, sala de reunies do Ncleo de Concursos da UFPR Campus I Agrrias. Aos2

    E-Print Network [OSTI]

    Paraná, Universidade Federal do

    Atendimento ao Estudante e Sustentabilidade Financeira. Prosseguindo com a40 apresentação explicou como foi

  10. Robust Detection in the Presence of Integrity Attacks Yilin Mo, Jo~ao Hespanha, Bruno Sinopoli

    E-Print Network [OSTI]

    Hespanha, João Pedro

    Acquisition (SCADA) sys- tems, for example, implement the distributed control systems that run a wide range, facility control and power grids. A successful attack to SCADA systems may significantly hamper the economy, the environment, and may even lead to the loss of human life. The first-ever SCADA system malware (called Stuxnet

  11. Resilient Detection in the Presence of Integrity Attacks Yilin Mo, Jo~ao Hespanha, Bruno Sinopoli

    E-Print Network [OSTI]

    Hespanha, João Pedro

    measurements. Supervisory Control And Data Acquisition (SCADA) systems, for example, run a wide range of safety the economy, the environment, and may even lead to the loss of human life. The first-ever SCADA system malware (called Stuxnet) was found in July 2010 and rose significant concern about SCADA system security [1], [2

  12. International Journal of Cooperative Information Systems Vol. 23, No. 1 (2014) 1440002 (33 pages)

    E-Print Network [OSTI]

    Ferreira, Paulo

    2014-01-01

    for Cooperative Editing in Heterogeneous Environments Andr´e Pessoa Negr~ao , Jo~ao Costa , Paulo Ferreira and Lu Redol 9, Lisboa, Portugal andre.pessoa@ist.utl.pt joao.da.costa@ist.utl.pt paulo´is Veiga§ Distributed Systems Group, INESC-ID Instituto Superior T´ecnico, Universidade de Lisboa Rua Alves

  13. Personal observations on interdisciplinarity

    SciTech Connect (OSTI)

    Kaufmann, E. N.

    1999-10-11

    The author's assignment was to report on how I{sup 3} relates to professional societies and journals he has known, a not unreasonable request given past associations with the Materials Research Society (MRS) and its journal, JMR, particularly in their more formative years. Some recollections and some comments on current postures of MRS and JMR will be found in the section following. There are manifold anecdotes one might relate about overcoming (or not) barriers raised by disciplinary preconception and much revered institutional norms. But to what end? On recalling his own involvements and on trying to discern the common elements, the author concludes that lessons learned from such accounts are, at the detail level, too situation-specific to be generally useful while at the same time being easily generalized to a few tenets that most of us by now find obvious in principle but that provide no actionable roadmap for implementing I{sup 3} in a specific new arena. How can that be? Other contributors are submitting the I{sup 3}R challenge to scholarly analysis and reporting on significant impediments and enviable achievements. He notes that the common themes permeating the entire discussion reduce to a few fundamental aspects of human nature well known and ubiquitous not merely in the universe of science, technology and research, but in broader society. He feels it is important not to lose sight of this as one examines I{sup 3} problems and solutions, for it is often the larger context that rises to thwart the best of local intentions. He feels that humans are a risk averse species. This translates into resistance to change and thus to institutional inertia. When taken in concert with the subjective propensity to categorize and the objective need at any given stage of development to parse complex systems into manageable subunits, it becomes clear why rigid taxonomies are the rule. Be they definitions of departments on campus, political labels, or finding program classifications. It is fair to say that in the examples presented at this gathering, the origin of hurdles confronting introduction of an I{sup 3} approach in extant systems is the inevitable rigidity of existing structures. Similarly, successes seem to arise when one or more of a few criteria are met. Based on enlightened self-interest, the principal movers find the risk-reward calculus of success compelling enough to pay the price of breaking with tradition. This is often facilitated when the entrepreneurial venture does not risk the mainstay of the principals' vocations. Also, barriers are lowered considerably when the new I{sup 3} enterprise is green field i.e., not making a frontal assault on a preexisting structure. Otherwise, the organizations involved must offer some open avenues to change or at least to circumvent boundaries. Having the right-sized, well-positioned resources is certainly also necessary. Of course, it would be naive to underestimate the importance of the details underlying any and all I{sup 3} successes, but these must be devised in the milieu of the particular people and institutions involved. The author believes that no generic protocols for barrier reduction or for incentives that balance risk will fit differing circumstances. Attempts to map one successful formula onto a new situation are likely to disappoint. Likewise, general programs to promote I{sup 3} in a top down fashion may raise awareness and enthusiasm, but are always tested at the bench--just as in technology transfer, I{sup 3}R is a contact sport. Although not sufficient, it is nevertheless still clearly a necessary prerequisite to create and sustain genuine and practical inducements that mitigate the risk attendant to disturbing the status quo and blunt institutional disincentives.

  14. Designed for: Ocean Observing Demo: A collaboration between

    E-Print Network [OSTI]

    effective low cost ocean observing system. This system was recently developed and deployed for offshore oil. The Fetch node was deployed in 550 feet of water to measure ocean temperature and pressure, and the Tsunami Observing Initiatives Pioneer Array. The Fetch will record pressure and temperatures at this site prior

  15. THEORY OF THE CONTROL OF OBSERVABLE QUANTUM V. P. BELAVKIN

    E-Print Network [OSTI]

    Belavkin, Viacheslav P.

    . The general problem of optimal control of a quantum-mechanical system is discussed and the corre- sponding], of the dynamical observation and feedback control optimization problems for such systems has provided a means measurement and control of classical (i.e., non-quantum) Markov processes with quantum observation channels

  16. XXIX SIMP OSIO BRASILEIRO DE TELECOMUNICAC ~OES -SBrT'11, 02-05 DE OUTUBRO DE 2011, CURITIBA, PR Propagac~ao de Qualidade para Sequ^encias de Video

    E-Print Network [OSTI]

    de Queiroz, Ricardo L.

    baixo ou m´edio movimento. S~ao propostos dois algoritmos de baixa complexidade para selec¸~ao do modo de codificac¸~ao do macrobloco e para o passo de quantizac¸~ao. Tais algoritmos foram implementados computacional. Entre essas melhorias, estima-se que os algoritmos de estimac¸~ao movimento inteira e sub-pixel s

  17. Hawaii Papa O Ke Ao -is the name chosen for this group tasked with developing a plan to make the University of

    E-Print Network [OSTI]

    Hawaii Papa O Ke Ao -is the name chosen for this group tasked with developing a plan to make the University of Hawaii a leader in indigenous education. The phrase simply means Hawaii Foundations (Papa) and Wkea (reflected in his Ao form), the original parents of Hawaii Consciousness. #12; 1

  18. Apparatus for observing a hostile environment

    DOE Patents [OSTI]

    Nance, Thomas A. (Aiken, SC); Boylston, Micah L. (Williston, SC); Robinson, Casandra W. (Trenton, SC); Sexton, William C. (Aiken, SC); Heckendorn, Frank M. (Aiken, SC)

    2000-01-01

    An apparatus is provided for observing a hostile environment, comprising a housing and a camera capable of insertion within the housing. The housing is a double wall assembly with an inner and outer wall with an hermetically sealed chamber therebetween. A housing for an optical system used to observe a hostile environment is provided, comprising a transparent, double wall assembly. The double wall assembly has an inner wall and an outer wall with an hermetically sealed chamber therebetween. The double wall assembly has an opening and a void area in communication with the opening. The void area of the housing is adapted to accommodate the optical system within said void area. An apparatus for protecting an optical system used to observe a hostile environment is provided comprising a housing; a tube positioned within the housing; and a base for supporting the housing and the tube. The housing comprises a double wall assembly having an inner wall and an outerwall with an hermetically sealed chamber therebetween. The tube is adapted to house the optical system therein.

  19. State observer for synchronous motors

    DOE Patents [OSTI]

    Lang, Jeffrey H. (Waltham, MA)

    1994-03-22

    A state observer driven by measurements of phase voltages and currents for estimating the angular orientation of a rotor of a synchronous motor such as a variable reluctance motor (VRM). Phase voltages and currents are detected and serve as inputs to a state observer. The state observer includes a mathematical model of the electromechanical operation of the synchronous motor. The characteristics of the state observer are selected so that the observer estimates converge to the actual rotor angular orientation and velocity, winding phase flux linkages or currents.

  20. rK6)ao>x -^ i D) Ris-M-2906(ENf

    E-Print Network [OSTI]

    , but sold at the normal price. Replacements, if they can be issued, will be available for purchase of fuel savings and power supply capabilities for a number of system configu

  1. Observation

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

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

  2. Observation

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

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

  3. Observation

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnical Report:Speeding accessby aLEDSpeeding accessSpeeding access

  4. NS&T MANAGEMENT OBSERVATIONS

    SciTech Connect (OSTI)

    Gianotto, David

    2014-06-01

    The INL Management Observation Program (MOP) is designed to improve managers and supervisors understanding of work being performed by employees and the barriers impacting their success. The MOP also increases workers understanding of managements’ expectations as they relate to safety, security, quality, and work performance. Management observations (observations) are designed to improve the relationship and trust between employees and managers through increased engagement and interactions between managers and researchers in the field. As part of continuous improvement, NS&T management took initiative to focus on the participation and quality of observations in FY 14. This quarterly report is intended to (a) summarize the participation and quality of management’s observations, (b) assess observations for commonalities or trends related to facility or process barriers impacting research, and (c) provide feedback and make recommendations for improvements NS&T’s MOP.

  5. NS&T Management Observations

    SciTech Connect (OSTI)

    Gianotto, David

    2014-09-01

    The INL Management Observation Program (MOP) is designed to improve managers and supervisors understanding of work being performed by employees and the barriers impacting their success. The MOP also increases workers understanding of managements’ expectations as they relate to safety, security, quality, and work performance. Management observations (observations) are designed to improve the relationship and trust between employees and managers through increased engagement and interactions between managers and researchers in the field. As part of continuous improvement, NS&T management took initiative to focus on the participation and quality of observations in FY 14. This quarterly report is intended to (a) summarize the participation and quality of management’s observations, (b) assess observations for commonalities or trends related to facility or process barriers impacting research, and (c) provide feedback and make recommendations for improvements NS&T’s MOP.

  6. Cosmological inference using gravitational wave observations alone

    E-Print Network [OSTI]

    Walter Del Pozzo; Tjonnie G. F. Li; Chris Messenger

    2015-06-22

    Gravitational waves emitted during the coalescence of binary neutron star systems are self-calibrating signals. As such they can provide a direct measurement of the luminosity distance to a source without the need for a cosmic distance scale ladder. In general, however, the corresponding redshift measurement needs to be obtained electromagnetically since it is totally degenerate with the total mass of the system. Nevertheless, recent Fisher matrix studies has shown that if information about the equation of state of the neutron stars is available, it is indeed possible to extract redshift information from the gravitational wave signal alone. Therefore, measuring the cosmological parameters in pure gravitational wave fashion is possible. Furthermore, the huge number of sources potentially observable by the Einstein Telescope has led to speculations that the gravitational wave measurement is potentially competitive with traditional methods. The Einstein telescope is a conceptual study for a third generation gravitational wave detector which is designed to yield detections of $10^3-10^7$ binary neutron star systems per year. This study presents the first Bayesian investigation of the accuracy with which the cosmological parameters can be measured using observations of binary neutron star systems by the Einstein Telescope with the one year of observations. We find by direct simulation of $10^3$ detections of binary neutron stars that, within our simplifying assumptions, $H_0,\\Omega_m,\\Omega_\\Lambda,w_0$ and $w_1$ can be measured at the $95\\%$ level with an accuracy of $\\sim 8\\%,65\\%,39\\%,80\\%$ and $90\\%$, respectively. We also find, by extrapolation, that a measurement accuracy comparable with current measurements by Planck is reached for a number of observed events $O(10^{6-7})$

  7. Accelerated Expansion: Theory and Observations

    E-Print Network [OSTI]

    David Polarski

    2001-09-20

    The present paradigm in cosmology is the usual Big-Bang Cosmology in which two stages of accelerated expansion are incorporated: the inflationary phase in the very early universe which produces the classical inhomogeneities observed in the universe, and a second stage of acceleration at the present time as the latest Supernovae observations seem to imply. Both stages could be produced by a scalar field and observations will strongly constrain the microscopic lagrangian of any proposed model.

  8. Performance of Subaru adaptive optics system and the scientific results

    E-Print Network [OSTI]

    Iye, Masanori

    Performance of Subaru adaptive optics system and the scientific results Hideki Takami*a , Naruhisa Institute, Heidelberg ABSTRACT We present an overview of Subaru Cassegrain adaptive optics system and its light in Dec. 2000. The AO system has been in service for two instruments, IRCS; infrared camera

  9. Loop quantum gravity and observations

    E-Print Network [OSTI]

    A. Barrau; J. Grain

    2015-10-28

    Quantum gravity has long been thought to be completely decoupled from experiments or observations. Although it is true that smoking guns are still missing, there are now serious hopes that quantum gravity phenomena might be tested. We review here some possible ways to observe loop quantum gravity effects either in the framework of cosmology or in astroparticle physics.

  10. Observational Study PAUL R. ROSENBAUM

    E-Print Network [OSTI]

    George, Edward I.

    . Howell John Wiley & Sons, Ltd, Chichester, 2005 #12;Observational Study Observational Studies Defined describing the subjects before treatment. As a consequence, random assignment tends to make the groups comparable both in terms of measured char- acteristics and characteristics that were not or could

  11. Sloan Digital Sky Survey observing time tracking and efficiency measurement

    SciTech Connect (OSTI)

    Eric H. Neilsen, Jr.; Richard G. Kron; William N. Boroski

    2002-10-16

    Accurate and consistent time tracking is essential for evaluating the efficiency of survey observing operations and identifying areas that need improvement. Off the shelf time tracking software, which requires users to enter activities by hand, proved tedious to use and insufficiently exible. In this paper, we present an alternate time tracking system developed specifically for Sloan Digital Sky Survey observing. This system uses an existing logging system, murmur, to log the beginning and ending times of tracked circumstances, including activities, weather, and problems which effect observing. Operations software automatically generates most entries for routine observing activities; in a night of routine observing, time tracking requires little or no attention from the observing staff. A graphical user interface allows observers to make entries marking time lost to weather and equipment, and to correct inaccurate entries made by the observing software. The last is necessary when the change in activity is not marked by a change in the state of the software or instruments, or when the time is used for engineering or other observing not part of routine survey data collection. A second utility generates reports of time usage from these logs. These reports include totals for the time spent for each observing task, time lost to weather and problems, efficiency statistics for comparison with the survey baseline, and a detailed listing of what activities and problems were present in any covered time period.

  12. Monopolos e Curvas Algebricas -Curso de Mestrado em Matematica Aplicada -IST Jo~ao Pimentel Nunes

    E-Print Network [OSTI]

    Nunes, João Pimentel

    . - M. Atiyah e N. Hitchin, "Low Energy Scattering of Non-abelian Monopoles", Phys.Lett. A107 (1985) 21. - M. Atiyah e N. Hitchin, "Low Energy Scattering of Non-abelian Magnetic Monopoles", Phil´emin.Math.Sup. 105, Les Presses Univ. de Montr´eal, 1987. - N. Hitchin, "Integrable Systems in Riemannian Geometry

  13. Observable signatures of general relativistic dynamics in compact binaries

    E-Print Network [OSTI]

    Lang, Ryan N. (Ryan Nathan)

    2009-01-01

    The effects of general relativity (GR) in astrophysical systems are often difficult to calculate, but they can have important consequences for observables. This thesis considers the impact of previously-ignored GR effects ...

  14. Observation of Magnetoelectric Multiferroicity in a Cubic Perovskite...

    Office of Scientific and Technical Information (OSTI)

    Observation of Magnetoelectric Multiferroicity in a Cubic Perovskite System:LaMn3Cr4O12 Citation Details In-Document Search This content will become publicly available on August...

  15. Systems and Control Letters (special issue on hybrid systems), vol. 38, pp. 167-177, Nov 1999 1 Logic-based switching control of a nonholonomic

    E-Print Network [OSTI]

    Liberzon, Daniel

    Systems and Control Letters (special issue on hybrid systems), vol. 38, pp. 167-177, Nov 1999 1 Logic-based switching control of a nonholonomic system with parametric modeling uncertainty #3; Jo~ao P is concerned with control of nonholonomic systems in the presence of parametric modeling uncertainty. The speci

  16. Passive States for Essential Observers

    E-Print Network [OSTI]

    Robert Strich

    2008-01-23

    The aim of this note is to present a unified approach to the results given in \\cite{bb99} and \\cite{bs04} which also covers examples of models not presented in these two papers (e.g. $d$-dimensional Minkowski space-time for $d\\geq 3$). Assuming that a state is passive for an observer travelling along certain (essential) worldlines, we show that this state is invariant under the isometry group, is a KMS-state for the observer at a temperature uniquely determined by the structure constants of the Lie algebra involved and fulfills (a variant of) the Reeh-Schlieder property. Also the modular objects associated to such a state and the observable algebra of an observer are computed and a version of weak locality is examined.

  17. Jet observables without jet algorithms

    E-Print Network [OSTI]

    Bertolini, Daniele

    We introduce a new class of event shapes to characterize the jet-like structure of an event. Like traditional event shapes, our observables are infrared/collinear safe and involve a sum over all hadrons in an event, but ...

  18. Baryon Resonances Observed at BES

    E-Print Network [OSTI]

    B. S. Zou

    2008-02-01

    The $\\psi$ decays provide a novel way to explore baryon spectroscopy and baryon structure. The baryon resonances observed from $\\psi$ decays at BES are reviewed. The implications and prospects at upgraded BESIII/BEPCII are discussed.

  19. Mm/submm observations of symbiotic binary stars

    E-Print Network [OSTI]

    J. Mikolajewska; R. J. Ivison; A. Omont

    2002-10-22

    We present and discuss mm/submm observations of quiescent S-type symbiotic systems, and compare them with popular models proposed to account for their radio emission. We find that the M giant mass-loss rates derived from our observations are systematically higher than those reported for single M giants.

  20. XXX SIMP OSIO BRASILEIRO DE TELECOMUNICAC ~OES -SBrT'12, 13-16 DE SETEMBRO DE 2012, BRASILIA, DF Codificac~ao de Video H.264/AVC em Tempo Real e

    E-Print Network [OSTI]

    de Queiroz, Ricardo L.

    ^encia e dissipac¸~ao t´ermica. Atu- almente, o uso de energia e as emiss~oes de carbono s~ao itens de´ILIA, DF Codificac¸~ao de V´ideo H.264/AVC em Tempo Real e Restrita por Energia Tiago A. da Fonseca e maior e, portanto, maior consumo de energia. Para permitir soluc¸~oes verdes de codificac¸~ao de v

  1. 1.2 Variedades de curvas. O objetivo desta se,c"ao 'e em primeiro lugar o de especializar alguns resu*

    E-Print Network [OSTI]

    Tausk, Daniel Victor

    - eraliza,c"oes para espa,cos de se,c"oes de um fibrado geral, mas o objetivo des* *ta se,c"ao 'e jus N agora passa a ser chamad* *a de M. Teremos sempre um tipo M de espa,co de se,c"oes que fibrado misto sobre I (cu* *jo fibrado das bases 'e I x M). Teremos ent"ao dois tipos M1, M2 de espa

  2. General relativistic observables of the GRAIL mission

    E-Print Network [OSTI]

    Turyshev, Slava G; Sazhin, Mikhail V

    2012-01-01

    We present a realization of astronomical relativistic reference frames in the solar system and its application to the GRAIL mission. We model the necessary spacetime coordinate transformations for light-trip time computations and address some practical aspects of the implementation of the resulting model. We develop all the relevant relativistic coordinate transformations that are needed to describe the motion of the GRAIL spacecraft and to compute all observable quantities. We take into account major relativistic effects contributing to the dual one-way range observable, which is derived from one-way signal travel times between the two GRAIL spacecraft. We develop a general relativistic model for this fundamental observable of GRAIL, accurate to 1 $\\mu$m. We develop and present a relativistic model for another key observable of this experiment, the dual one-way range-rate, accurate to 1 $\\mu$m/s. The presented formulation justifies the basic assumptions behind the design of the GRAIL mission. It may also be ...

  3. General relativistic observables of the GRAIL mission

    E-Print Network [OSTI]

    Slava G. Turyshev; Viktor T. Toth; Mikhail V. Sazhin

    2012-12-18

    We present a realization of astronomical relativistic reference frames in the solar system and its application to the GRAIL mission. We model the necessary spacetime coordinate transformations for light-trip time computations and address some practical aspects of the implementation of the resulting model. We develop all the relevant relativistic coordinate transformations that are needed to describe the motion of the GRAIL spacecraft and to compute all observable quantities. We take into account major relativistic effects contributing to the dual one-way range observable, which is derived from one-way signal travel times between the two GRAIL spacecraft. We develop a general relativistic model for this fundamental observable of GRAIL, accurate to 1 $\\mu$m. We develop and present a relativistic model for another key observable of this experiment, the dual one-way range-rate, accurate to 1 $\\mu$m/s. The presented formulation justifies the basic assumptions behind the design of the GRAIL mission. It may also be used to further improve the already impressive results of this lunar gravity recovery experiment after the mission is complete. Finally, we present transformation rules for frequencies and gravitational potentials and their application to GRAIL.

  4. Observations of Solids in Protoplanetary Disks

    E-Print Network [OSTI]

    Andrews, Sean M

    2015-01-01

    This review addresses the state of research that employs astronomical (remote sensing) observations of solids ("dust") in young circumstellar disks to learn about planet formation. The intention is for it to serve as an accessible, introductory, pedagogical resource for junior scientists interested in the subject. After some historical background and a basic observational primer, the focus is shifted to the three fundamental topics that broadly define the field: (1) demographics -- the relationships between disk properties and the characteristics of their environments and hosts; (2) structure -- the spatial distribution of disk material and its associated physical conditions and composition; and (3) evolution -- the signposts of key changes in disk properties, including the growth and migration of solids and the impact of dynamical interactions with young planetary systems. Based on the state of the art results in these areas, suggestions are made for potentially fruitful lines of work in the near future.

  5. Observational Approach to Chromium Site Remediation - 13266

    SciTech Connect (OSTI)

    Scott Myers, R.

    2013-07-01

    Production reactors at the U.S. Department of Energy's (DOE) Hanford Site in Richland, Washington, required massive quantities of water for reactor cooling and material processing. To reduce corrosion and the build-up of scale in pipelines and cooling systems, sodium dichromate was added to the water feedstock. Spills and other releases at the makeup facilities, as well as leaks from miles of pipelines, have led to numerous areas with chromium-contaminated soil and groundwater, threatening fish populations in the nearby Columbia River. Pump-and-treat systems have been installed to remove chromium from the groundwater, but significant contamination remain in the soil column and poses a continuing threat to groundwater and the Columbia River. Washington Closure Hanford, DOE, and regulators are working on a team approach that implements the observational approach, a strategy for effectively dealing with the uncertainties inherent in subsurface conditions. Remediation of large, complex waste sites at a federal facility is a daunting effort. It is particularly difficult to perform the work in an environment of rapid response to changing field and contamination conditions. The observational approach, developed by geotechnical engineers to accommodate the inherent uncertainties in subsurface conditions, is a powerful and appropriate method for site remediation. It offers a structured means of quickly moving into full remediation and responding to the variations and changing conditions inherent in waste site cleanups. A number of significant factors, however, complicate the application of the observational approach for chromium site remediation. Conceptual models of contamination and site conditions are difficult to establish and get consensus on. Mid-stream revisions to the design of large excavations are time-consuming and costly. And regulatory constraints and contract performance incentives can be impediments to the flexible responses required under the observational approach. The WCH project team is working closely with stakeholders and taking a number of steps to meet these challenges in a continuing effort to remediate chromium contaminated soil in an efficient and cost-effective manner. (authors)

  6. Observability and Controllability of Nonlinear Networks: The Role of Symmetry

    E-Print Network [OSTI]

    Andrew J. Whalen; Sean N. Brennan; Timothy D. Sauer; Steven J. Schiff

    2014-10-06

    Observability and controllability are essential concepts to the design of predictive observer models and feedback controllers of networked systems. For example, noncontrollable mathematical models of real systems have subspaces that influence model behavior, but cannot be controlled by an input. Such subspaces can be difficult to determine in complex nonlinear networks. Since almost all of the present theory was developed for linear networks without symmetries, here we present a numerical and group representational framework, to quantify the observability and controllability of nonlinear networks with explicit symmetries that shows the connection between symmetries and nonlinear measures of observability and controllability. We numerically observe and theoretically predict that not all symmetries have the same effect on network observation and control. Our analysis shows that the presence of symmetry in a network may decrease observability and controllability, although networks containing only rotational symmetries remain controllable and observable. These results alter our view of the nature of observability and controllability in complex networks, change our understanding of structural controllability, and affect the design of mathematical models to observe and control such networks.

  7. CHANGESINPERMEABILITYCAUSEDBYTRANSIENT STRESSES: FIELD OBSERVATIONS, EXPERIMENTS,

    E-Print Network [OSTI]

    Manga, Michael

    to seal pores. Monitor- ing permeability in geothermal systems where there is abun- dant seismicity increase permeability and fluid mobility in geo- logic media. In natural systems, strain amplitudes, and enhance production from petroleum reservoirs. Enhanced permeability typically recovers to prestimulated

  8. Tailoring Strong Lensing Cosmographic Observations

    E-Print Network [OSTI]

    Linder, Eric V

    2015-01-01

    Strong lensing time delay cosmography has excellent complementarity with other dark energy probes, and will soon have abundant systems detected. We investigate two issues in the imaging and spectroscopic followup required to obtain the time delay distance. The first is optimization of spectroscopic resources. We develop a code to optimize the cosmological leverage under the constraint of constant spectroscopic time, and find that sculpting the lens system redshift distribution can deliver a 40% improvement in dark energy figure of merit. The second is the role of systematics, correlated between different quantities of a given system or model errors common to all systems. We show how the levels of different systematics affect the cosmological parameter estimation, and derive guidance for the fraction of double image vs quad image systems to follow as a function of differing systematics between them.

  9. A NEW PARAMETRIZATION OF OBSERVERS INGRID BLUMTHALER AND JOCHEN TRUMPF

    E-Print Network [OSTI]

    Trumpf, Jochen

    by inspection. 1. Problem formulation. We study plants (observed systems) of the form P = w1 w2 w3 Fw1+w order, matrix) differential operators and the plant P is a linear time-invariant continuous time system is that the signal module F is an injective cogenerator in the category of D-modules, cf. [1]. Following the ideas

  10. Objectivity of Quantum Measurement in Many-Observer World

    E-Print Network [OSTI]

    Sheng-Wen Li; C. Y. Cai; X. F. Liu; C. P. Sun

    2015-08-06

    The objectivity of quantum measurement is treated as an emergent phenomenon with $N$ observers who can agree to the same result of measurement, and meanwhile, they can identify their records with each other. In this many-observer world (MOW), an objective quantum measurement is dealt with as a multipartite [$(N+1)$-body] quantum correlation among the measured system and $N$ observers when its bipartite reductions are the same classical correlations. With this conceptual clarification, we find that, an objective quantum measurement is implemented if and only if the MOW is initially factorized in a pure state and then the total system can evolve into a generalized GHZ state with respect to the orthogonal basis preferred by each observer. Especially, such objective quantum measurement is recast in ideal classical correlation when the observer world is macroscopic for $N\\rightarrow\\infty$.

  11. The Case for Mobile Devices in Environmental Observing Systems

    E-Print Network [OSTI]

    to interact with the embedded cyberinfrastructure, such as the sensor network. To bridge this gap, we argue devices such as PDAs and smart phones. We identify several key use cases and user bases, and explain how to be considered. We identify several key use case scenarios and user bases. In order to bridge this gap

  12. Observable behavior of dynamic systems: component reasoning for concurrent objects #

    E-Print Network [OSTI]

    Johnsen, Einar Broch

    concurrent objects. # This research is partially funded by the EU project IST­33826 CREDO: Modeling and analysis of evolutionary structures for distributed services (http://credo.cwi.nl). 1 Email: johand

  13. Observable behavior of dynamic systems: component reasoning for concurrent objects

    E-Print Network [OSTI]

    Johnsen, Einar Broch

    concurrent objects. This research is partially funded by the EU project IST-33826 CREDO: Modeling and analysis of evolutionary structures for distributed services (http://credo.cwi.nl). 1 Email: johand

  14. On asymptotically efficient estimation in partially observed systems

    E-Print Network [OSTI]

    Di Girolami, Cristina

    Hemipshere's Autumn or Fall Equinox hasn't happened since 1662 and will not happen again until March 20, 2034 the March Equinox A total solar eclipse coinciding with Northern Hemisphere's Spring Equinox and Southern

  15. Disappearing Evidence: the Need for a Global Paleoclimate Observing System

    E-Print Network [OSTI]

    Bradley, Raymond S.

    are relatively rare in most reef areas of the world. Unfortu- nately, a significant number of these corals have, diatoms, cladocereans), isotopes, and other proxy measurements in lake and ocean sediments, corals coordinated effort, GPOS, designed to rescue endangered natural archives of past environ- mental variability

  16. Campaign-level science traceability for Earth observation system architecting

    E-Print Network [OSTI]

    Seher, Theodore K. (Theodore Kimball)

    2009-01-01

    The Earth Sciences Decadal Survey of 2007 presented a comprehensive vision for the evolution of space-based Earth Science resources. The practical development of the Decadal campaign, however, has highlighted four challenges ...

  17. On the Observability of Linear Systems from Random, Compressive Measurements

    E-Print Network [OSTI]

    Sanandaji, Borhan M.

    Efficiency and Renewable Energy Grant DE-FG36-08GO88100. we have yK = OKx0. (3) If OK has full column rank (i Property (RIP), which is central to much analysis in CS. We also illustrate our results with a simple case-0830320, DARPA Grant HR0011-08- 1-0078, NSF grant CNS-0931748 and Department of Energy, Office of Energy

  18. Automated Surface Observing System: Standby Power Options | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based Fuels Research atDepartmentAudits and6AuidtWorkplace

  19. Augmenting system reliability analyses with observation priors (Conference)

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing Bacteria (Technical Report) | SciTech Connect AssessingBasinLecture)SciTechscales|

  20. Augmenting system reliability analyses with observation priors (Conference)

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing Bacteria (Technical Report) | SciTech Connect AssessingBasinLecture)SciTechscales||

  1. Common Cyber Security Vulnerabilities Observed in Control System

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electric vehicle (PEV)Day-June 22, 2015OperationNonprofit| Department

  2. Observation on growth of bacteria 

    E-Print Network [OSTI]

    Unknown

    2011-08-17

    3013and g2009g3009 are the gain of the bandpass function at frequencies of g1858g3030, g1858g3013 and g1858g3009, respectively. For typical bandpass filtering, g2009g3030 ? 1 (3.6) g2009g3013 = g2009g3009 < g2009g3030 . (3.7) Thus, it is always... Sequence of Bandpass System .................................. 33 3.6 Jitter Transfer Function of Bandpass System ................................................... 34 3.7 Jitter Transfer Functions of Bandpass Systems with Q over 3 ? 30...

  3. TV Meteor Observations from Modra J. Toth L. Kornos S. Gajdos D. Kalmancok

    E-Print Network [OSTI]

    Veres, Peter

    results of single-station observation using the new fish-eye TV system, as well as double station TV observation of the Geminids 2006 shower. The fixed fish-eye TV system was developed for monitoring meteor the UFOAnalyser software. Keywords Fish-eye lenses Á Meteor shower Á TV meteor observations 1 Introduction

  4. X-ray Observations of Mrk 231

    E-Print Network [OSTI]

    T. J. Turner

    1998-08-10

    This paper presents new X-ray observations of Mrk 231, an active galaxy of particular interest due to its large infrared luminosity and the presence of several blueshifted broad absorption line (BAL) systems, a phenomenon observed in a small fraction of QSOs. A ROSAT HRI image of Mrk 231 is presented, this shows an extended region of soft X-ray emission, covering several tens of kpc, consistent with the extent of the host galaxy. An ASCA observation of Mrk 231 is also presented. Hard X-rays are detected but the data show no significant variability in X-ray flux. The hard X-ray continuum is heavily attenuated and X-ray column estimates range from ~ 2 x 10^{22} - 10^{23} cm^{-2} depending on whether the material is assumed to be neutral or ionized, and on the model assumed for the extended X-ray component. These ASCA data provide only the second hard X-ray spectrum of a BAL AGN presented to date. The broad-band spectral-energy-distribution of the source is discussed. While Mrk 231 is X-ray weak compared to Seyfert 1 galaxies, it has an optical-to-X-ray spectrum typical of a QSO.

  5. Chaos, Dirac observables and constraint quantization

    E-Print Network [OSTI]

    Bianca Dittrich; Philipp A. Hoehn; Tim A. Koslowski; Mike I. Nelson

    2015-08-08

    There is good evidence that full general relativity is non-integrable or even chaotic. We point out the severe repercussions: differentiable Dirac observables and a reduced phase space do not exist in non-integrable constrained systems and are thus unlikely to occur in a generic general relativistic context. Instead, gauge invariant quantities generally become discontinuous, thus not admitting Poisson-algebraic structures and posing serious challenges to a quantization. Non-integrability also renders the paradigm of relational dynamics cumbersome, thereby straining common interpretations of the dynamics. We illustrate these conceptual and technical challenges with simple toy models. In particular, we exhibit reparametrization invariant models which fail to be integrable and, as a consequence, can either not be quantized with standard methods or lead to sick quantum theories without a semiclassical limit. These troubles are qualitatively distinct from semiclassical subtleties in unconstrained quantum chaos and can be directly traced back to the scarcity of Dirac observables. As a possible resolution, we propose to change the method of quantization by refining the configuration space topology until the generalized observables become continuous in the new topology and can acquire a quantum representation. This leads to the polymer quantization method underlying loop quantum cosmology and gravity. Remarkably, the polymer quantum theory circumvents the problems of the quantization with smooth topology, indicating that non-integrability and chaos, while a challenge, may not be a fundamental obstruction for quantum gravity.

  6. CX Lyrae 2008 Observing Campaign

    E-Print Network [OSTI]

    de Ponthiere, Pierre; Hambsch, Franz-Josef

    2012-01-01

    The Blazhko effect in CX Lyr has been reported for the first time by Le Borgne et al. (2007). The authors have pointed out that the Blazhko period was not evaluated accurately due to dataset scarcity. The possible period values announced were 128 or 227 days. A newly conducted four-month observing campaign in 2008 (fifty-nine observation nights) has provided fourteen times of maximum. From a period analysis of measured times of maximum, a Blazhko period of 62 +/- 2 days can be suggested. However, the present dataset is still not densely sampled enough to exclude that the measured period is still a modulation of the real Blazhko period. Indeed the shape of the (O-C) curve does not repeat itself exactly during the campaign duration.

  7. RHESSI observation of flare elements

    E-Print Network [OSTI]

    Paolo C. Grigis; Arnold O. Benz

    2006-02-14

    RHESSI observations of elementary flare bursts are presented. These solar flare elements are distinct emission peaks of a duration of some tens of seconds present in the hard X-ray light curves. They are characterized by consistent soft-hard-soft spectral behavior, which can be described in a quantitative way and compared which predictions from acceleration models. A detailed analysis of hard X-ray images for an M5 class flare shows that elementary flare bursts do not occur at distinct locations, but as twin X-ray sources move smoothly along an arcade of magnetic loops. This observation apparently contradicts the predictions of standard translation invariant 2.5-dimensional reconnection models.

  8. Complete measurements of quantum observables

    E-Print Network [OSTI]

    Juha-Pekka Pellonpää

    2012-06-12

    We define a complete measurement of a quantum observable (POVM) as a measurement of the maximally refined version of the POVM. Complete measurements give information from the multiplicities of the measurement outcomes and can be viewed as state preparation procedures. We show that any POVM can be measured completely by using sequential measurements or maximally refinable instruments. Moreover, the ancillary space of a complete measurement can be chosen to be minimal.

  9. Infrared Observations of Galaxy Clusters

    E-Print Network [OSTI]

    David Elbaz

    1997-11-28

    This short paper reviews some of the results obtained from ISO observations (ISOCAM and ISOPHOT) on galaxy clusters: Chap.1: "Intracluster dust": new evidence for the presence of dust outside galaxies. Chap.2:"Mid-Infrared Emission of Galaxies" origin of the mid-IR emission. Chap.3:"Star Formation in Nearby Clusters" correlation of the 7 and 15 microns fluxes with the SFR. Chap.4:"Star Formation in z=0.2 Galaxy clusters" Study of the mid-IR emission of A1732 and A1689. Chap.5:"Star Formation in z>0.4 Galaxy clusters" Preliminary.

  10. Observation Wells | 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 ECoop Inc Jump to:Newberg, Oregon:OGE Energy Resources, IncInc JumpObamaObservation

  11. Magnetars: the physics behind observations

    E-Print Network [OSTI]

    Turolla, Roberto; Watts, Anna

    2015-01-01

    Magnetars are the strongest magnets in the present universe and the combination of extreme magnetic field, gravity and density makes them unique laboratories to probe current physical theories (from quantum electrodynamics to general relativity) in the strong field limit. Magnetars are observed as peculiar, burst--active X-ray pulsars, the Anomalous X-ray Pulsars (AXPs) and the Soft Gamma Repeaters (SGRs); the latter emitted also three "giant flares," extremely powerful events during which luminosities can reach up to 10^47 erg/s for about one second. The last five years have witnessed an explosion in magnetar research which has led, among other things, to the discovery of transient, or "outbursting," and "low-field" magnetars. Substantial progress has been made also on the theoretical side. Quite detailed models for explaining the magnetars' persistent X-ray emission, the properties of the bursts, the flux evolution in transient sources have been developed and confronted with observations. New insight on neu...

  12. Laser frequency combs for astronomical observations

    E-Print Network [OSTI]

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

    2008-09-09

    A direct measurement of the universe's expansion history could be made by observing in real time the evolution of the cosmological redshift of distant objects. However, this would require measurements of Doppler velocity drifts of about 1 centimeter per second per year, and astronomical spectrographs have not yet been calibrated to this tolerance. We demonstrate the first use of a laser frequency comb for wavelength calibration of an astronomical telescope. Even with a simple analysis, absolute calibration is achieved with an equivalent Doppler precision of approximately 9 meters per second at about 1.5 micrometers - beyond state-of-the-art accuracy. We show that tracking complex, time-varying systematic effects in the spectrograph and detector system is a particular advantage of laser frequency comb calibration. This technique promises an effective means for modeling and removal of such systematic effects to the accuracy required by future experiments to see direct evidence of the universe's putative acceleration.

  13. Interstellar water chemistry: from laboratory to observations

    E-Print Network [OSTI]

    van Dishoeck, Ewine F; Neufeld, David A

    2013-01-01

    Water is observed throughout the universe, from diffuse interstellar clouds to protoplanetary disks around young stars, and from comets in our own solar system and exoplanetary atmospheres to galaxies at high redshifts. This review summarizes the spectroscopy and excitation of water in interstellar space as well as the basic chemical processes that form and destroy water under interstellar conditions. Three major routes to water formation are identified: low temperature ion-molecule chemistry, high-temperature neutral-neutral chemistry and gas-ice chemistry. The rate coefficients of several important processes entering the networks are discussed in detail; several of them have been determined only in the last decade through laboratory experiments and theoretical calculations. Astronomical examples of each of the different chemical routes are presented using data from powerful new telescopes, in particular the Herschel Space Observatory. Basic chemical physics studies remain critically important to analyze ast...

  14. The Flare Activity of SgrA*; New Coordinated mm to X-Ray Observations

    E-Print Network [OSTI]

    A. Eckart; F. K. Baganoff; R. Schoedel; M. Morris; R. Genzel; G. C. Bower; D. Marrone; J. M. Moran; T. Viehmann; M. W. Bautz; W. N. Brandt; G. P. Garmire; T. Ott; S. Trippe; G. R. Ricker; C. Straubmeier; D. A. Roberts; F. Yusef-Zadeh; J. H. Zhao; R. Rao

    2005-12-16

    We report new simultaneous near-infrared/sub-millimeter/X-ray observations of the SgrA* counterpart associated with the massive 3-4x10**6 solar mass black hole at the Galactic Center. The main aim is to investigate the physical processes responsible for the variable emission from SgrA*. The observations have been carried out using the NACO adaptive optics (AO) instrument at the European Southern Observatory's Very Large Telescope and the ACIS-I instrument aboard the Chandra X-ray Observatory as well as the Submillimeter Array SMA on Mauna Kea, Hawaii, and the Very Large Array in New Mexico. We detected one moderately bright flare event in the X-ray domain and 5 events at infrared wavelengths.

  15. Bayesian Inference for Radio Observations

    E-Print Network [OSTI]

    Lochner, Michelle; Zwart, Jonathan T L; Smirnov, Oleg; Bassett, Bruce A; Oozeer, Nadeem; Kunz, Martin

    2015-01-01

    (Abridged) New telescopes like the Square Kilometre Array (SKA) will push into a new sensitivity regime and expose systematics, such as direction-dependent effects, that could previously be ignored. Current methods for handling such systematics rely on alternating best estimates of instrumental calibration and models of the underlying sky, which can lead to inaccurate uncertainty estimates and biased results because such methods ignore any correlations between parameters. These deconvolution algorithms produce a single image that is assumed to be a true representation of the sky, when in fact it is just one realisation of an infinite ensemble of images compatible with the noise in the data. In contrast, here we report a Bayesian formalism that simultaneously infers both systematics and science. Our technique, Bayesian Inference for Radio Observations (BIRO), determines all parameters directly from the raw data, bypassing image-making entirely, by sampling from the joint posterior probability distribution. Thi...

  16. Comet tail formation: Giotto observations

    SciTech Connect (OSTI)

    Wilken, B.; Jockers, K.; Johnstone, A.; Coates, A.; Heath, J.; Formisano, V.; Amata, E.; Winningham, J.D.; Thomsen, M.; Bryant, D.A.

    1986-01-01

    The process of mass loading of the solar wind by cometary ions, which forms comet tails, has been observed throughout the coma of comet Halley. Three distinct regimes were found where the nature of the energy and momentum coupling between solar wind and cometary ions is different. Outside the bow shock, where there is little angular scattering of the freshly ionized particles, the coupling is described by the simple pickup trajectory and the energy is controlled by the angle between the flow and the magnetic field. Just inside the bow shock, there is considerable scattering accompanied by another acceleration process which raises some particle energies well above the straightforward pickup value. Finally, closer to the nucleus, the amount of scattering decreases and the coupling is once more controlled by the magnetic field direction. 4 refs., 3 figs.

  17. Reported Significant Observation (RSO) studies. Revision 1

    SciTech Connect (OSTI)

    Eicher, R.W.

    1992-12-01

    The Reported Significant Observation (RSO) study used in the field of safety is an information-gathering technique where employee-participants describe situations they have personally witnessed involving good and bad practices and safe and unsafe conditions. This information is useful in the risk assessment process because it focuses on hazards and thereby facilitates their elimination. However, RSO cannot be the only component in a risk assessment program. Used by the Air Force in their aviation psychology program and further developed by John C. Flanagan, RSO is more commonly known as the ``Critical Incident Technique.`` However, the words ``Critical`` and ``Incident`` had other connotations in nuclear safety, prompting early users within the Aerojet Nuclear Company to coin the more fitting title of ``Reported Significant Observations.`` The technique spread slowly in the safety field primarily because the majority of users were researchers interested in after-the-fact data, with application to everyday problems and behavioral factors. RSO was formally recognized as a significant hazard reduction tool during the development of the Management Oversight and Risk Tree (MORT) program for the US Atomic Energy Commission. The Department of Energy (DOE) has, in turn, adopted MORT for its system safety program, and this has resulted in RSO being a modern and viable technique for DOE contractor safety programs.

  18. Exponenciais, Exponencia c ao

    E-Print Network [OSTI]

    Barata, João Carlos Alves

    derivadas de exponenciais: se A(#) for uma famâ?? �lia de matrizes em Mat(C, n) que depende contâ?? �nua e

  19. ARM - Instrument - aos

    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 Comments? WeDatastreamstps DocumentationAtlanticENAFieldgovInstrumentsaeth Documentation ARM Data

  20. ARM - Campaign Instrument - aos

    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 of NaturalDukeWakefieldSulfateSciTechtail.TheoryTuesday, August 10,govInstrumentsaerosmassspec

  1. ARM - Datastreams - aos

    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 Comments? We would love to hear from you! Send use0nrwptempmom Documentationhybr

  2. Unsuspected Pulmonary Embolism in Observation Unit Patients

    E-Print Network [OSTI]

    Limkakeng, Alexander T.; Glickman, Seth W; Cairns, Charles B; Chandra, Abhinav

    2009-01-01

    department observation unit. Emerg Med Clin North Am. 2001;ED) managed acute care unit on ED overcrowding and emergencyof a chest pain observation unit compared with routine care.

  3. Observed Communication in Distressed Couples' Interactions

    E-Print Network [OSTI]

    Baucom, Katherine Jane Williams

    2012-01-01

    A. (2011). Observed communication in couples two years afterA. (2011). Observed communication in couples two years afterA. (1996). The Communication Patterns Questionnaire: The

  4. First Observation of Plasmarons in Graphene

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

    First Observation of Plasmarons in Graphene First Observation of Plasmarons in Graphene Print Wednesday, 30 June 2010 00:00 An international team of scientists performing...

  5. Performance and evaluation of the infrared AO sensor CALICO Leander H. Mehrgan*, Siegfried Eschbaumer, Gert Finger, Manfred Meyer, and Joerg Stegmeier

    E-Print Network [OSTI]

    Liske, Jochen

    Performance and evaluation of the infrared AO sensor CALICO , Leander H. Mehrgan*, Siegfried and to investigate the best unit cell circuit for future infrared wavefront sensors, ESO has teamed up with CALTECH-Schwarzschild Str. 2, D-85748 Garching, Germany ABSTRACT The CALICO sensor is a pathfinder for the development

  6. Observational Tests and Predictive Stellar Evolution

    E-Print Network [OSTI]

    P. A. Young; E. E. Mamajek; David Arnett; James Liebert

    2001-03-23

    We compare eighteen binary systems with precisely determined radii and masses from 23 to 1.1 M_sol, and stellar evolution models produced with our newly revised code TYCHO. ``Overshooting'' and rotational mixing were suppressed in order to establish a baseline for isolating these and other hydrodynamic effects. Acceptable coeval fits are found for sixteen pairs without optimizing for heavy element or helium abundance. The precision of these tests is limited by the accuracies of the observed effective temperatures. High dispersion spectra and detailed atmospheric modeling should give more accurate effective temperatures and heavy element abundances. PV Cas, a peculiar early A system, EK Cep B, a known post-T Tauri star, and RS Cha, a member of a young OB association, are matched by pre-main sequence models. Predicted mass loss agrees with upper limits from IUE for CW Cep A and B. Relatively poor fits are obtained for binaries having at least one component in the mass range 1.7 < M/M_sol <2.6, whose evolution is sensitive to mixing. These discrepancies are robust and consistent with additional mixing in real stars. The predicted apsidal motion implies that massive star models are systematically less centrally condensed than the real stars. If these effects are due to overshooting, then the overshooting parameter alpha_OV increases with stellar mass. The apsidal motion constants are controlled by radiative opacity under conditions close to those directly measured in laser experiments, making this test more stringent than possible before.

  7. Optical monitor for observing turbulent flow

    DOE Patents [OSTI]

    Albrecht, Georg F. (Livermore, CA); Moore, Thomas R. (Rochester, NY)

    1992-01-01

    The present invention provides an apparatus and method for non-invasively monitoring turbulent fluid flows including anisotropic flows. The present invention uses an optical technique to filter out the rays travelling in a straight line, while transmitting rays with turbulence induced fluctuations in time. The output is two dimensional, and can provide data regarding the spectral intensity distribution, or a view of the turbulence in real time. The optical monitor of the present invention comprises a laser that produces a coherent output beam that is directed through a fluid flow, which phase-modulates the beam. The beam is applied to a temporal filter that filters out the rays in the beam that are straight, while substantially transmitting the fluctuating, turbulence-induced rays. The temporal filter includes a lens and a photorefractive crystal such as BaTiO.sub.3 that is positioned in the converging section of the beam near the focal plane. An imaging system is used to observe the filtered beam. The imaging system may take a photograph, or it may include a real time camera that is connected to a computer. The present invention may be used for many purposes including research and design in aeronautics, hydrodynamics, and combustion.

  8. ALASKA MARINE Alaska Marine Mammal Observer Program

    E-Print Network [OSTI]

    ALASKA MARINE MAMMAL PROGRAM 2012 #12;2012 Alaska Marine Mammal Observer Program Observer Manual Contents Section 1: The Alaska Marine Mammal Observer Program 1.0 Introduction 1.1 Marine Mammal Stock Program 1.5 Alaska Marine Mammal Observer Program Section 2: The Southeast Alaska Environment 2

  9. Supporting An Integrated Paper-Digital Workflow for Observational Research

    E-Print Network [OSTI]

    Hollan, Jim

    Supporting An Integrated Paper-Digital Workflow for Observational Research Nadir Weibel, Adam Fouse digital recording de- vices and storage facilities, is revolutionizing our ability to collect and analyze cognition and radically improve information-intensive work. In this paper we introduce a system to aid

  10. Biooptical observations of the 2004 Labrador Sea phytoplankton bloom

    E-Print Network [OSTI]

    Boss, Emmanuel S.

    showed an additional midJune peak in zooplankton biomass which was attributed to egglaying copepods increasingly important as these deployments become more commonplace via ocean observing systems. Moreover that during the bloom, 47 mmol C m-2 d-1 was assimilated into biomass and was rapidly exported, and that all

  11. Observability and Estimation Uncertainty Analysis for PMU Placement Alternatives

    E-Print Network [OSTI]

    Pollefeys, Marc

    Observability and Estimation Uncertainty Analysis for PMU Placement Alternatives Jinghe Zhang unit (PMU), developed in the 1980s, is considered to be one of the most important devices in the future of power systems. While PMU measurements currently cover fewer than 1% of the nodes in the U.S. power grid

  12. Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations Cedex 02, France. 2 GeoForschungsZentrum Potsdam - Section 2.2, 14473 Potsdam, Germany. 3 Iceland GeoSurvey - ISOR , 108 Reykjavík, Iceland Abstract Structural features of volcanic and hydrothermal systems can

  13. Les services d'observation et les moyens nationaux

    E-Print Network [OSTI]

    van Tiggelen, Bart

    -4 Instrumentation des télescopes et interféromètres radio et sub-millimétriques au sol . 9 AA-SO3....................................................................................................................... 25 AO-SO3 : CO

  14. The Arctic Lower Troposphere Observed Structure (ALTOS) Campaign

    SciTech Connect (OSTI)

    Verlinde, J

    2010-10-18

    The ALTOS campaign focuses on operating a tethered observing system for routine in situ sampling of low-level (< 2 km) Arctic clouds. It has been a long-term hope to fly tethered systems at Barrow, Alaska, but it is clear that the Federal Aviation Administration (FAA) will not permit in-cloud tether systems at Barrow, even if unmanned aerial vehicle (UAV) operations are allowed in the future. We have provided the scientific rationale for long-term, routine in situ measurements of cloud and aerosol properties in the Arctic. The existing restricted air space at Oliktok offers an opportunity to do so.

  15. Radio emission from Colliding-Wind Binaries: Observations and Models

    E-Print Network [OSTI]

    S. M. Dougherty; J. M. Pittard; E. P. O'Connor

    2005-10-18

    We have developed radiative transfer models of the radio emission from colliding-wind binaries (CWB) based on a hydrodynamical treatment of the wind-collision region (WCR). The archetype of CWB systems is the 7.9-yr period binary WR140, which exhibits dramatic variations at radio wavelengths. High-resolution radio observations of WR140 permit a determination of several system parameters, particularly orbit inclination and distance, that are essential for any models of this system. A model fit to data at orbital phase 0.9 is shown, and some short comings of our model described.

  16. Observation of Entanglement-Dependent Two-Particle Holonomic Phase

    E-Print Network [OSTI]

    J. C. Loredo; M. A. Broome; D. H. Smith; A. G. White

    2015-06-18

    Holonomic phases---geometric and topological---have long been an intriguing aspect of physics. They are ubiquitous, ranging from observations in particle physics to applications in fault tolerant quantum computing. However, their exploration in particles sharing genuine quantum correlations lack in observations. Here we experimentally demonstrate the holonomic phase of two entangled-photons evolving locally, which nevertheless gives rise to an entanglement-dependent phase. We observe its transition from geometric to topological as the entanglement between the particles is tuned from zero to maximal, and find this phase to behave more resilient to evolution changes with increasing entanglement. Furthermore, we theoretically show that holonomic phases can directly quantify the amount of quantum correlations between the two particles. Our results open up a new avenue for observations of holonomic phenomena in multi-particle entangled quantum systems.

  17. A Wireless Internet-Based Observatory: The Real-time Coastal Observation Network

    E-Print Network [OSTI]

    A Wireless Internet-Based Observatory: The Real-time Coastal Observation Network (ReCON) S. A community and educational institutions through the internet. A real-time database management system provides to the success of regional coastal ocean observing systems. The pervasiveness of wireless internet technology

  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. Delft University of Technology Master's Thesis in Embedded Systems

    E-Print Network [OSTI]

    Langendoen, Koen

    Delft University of Technology Freek van Polen, MSc Sense Observation Systems Andreas Loukas, MSc Delft

  20. Observation of Bloch oscillations in molecular rotation

    E-Print Network [OSTI]

    Johannes Floß; Andrei Kamalov; Ilya Sh. Averbukh; Philip H. Bucksbaum

    2015-04-26

    The periodically kicked quantum rotor is known for non-classical effects such as quantum localisation in angular momentum space or quantum resonances in rotational excitation. These phenomena have been studied in diverse systems mimicking the kicked rotor, such as cold atoms in optical lattices, or coupled photonic structures. Recently, it was predicted that several solid state quantum localisation phenomena - Anderson localisation, Bloch oscillations, and Tamm-Shockley surface states - may manifest themselves in the rotational dynamics of laser-kicked molecules. Here, we report the first observation of rotational Bloch oscillations in a gas of nitrogen molecules kicked by a periodic train of femtosecond laser pulses. A controllable detuning from the quantum resonance creates an effective accelerating potential in angular momentum space, inducing Bloch-like oscillations of the rotational excitation. These oscillations are measured via the temporal modulation of the refractive index of the gas. Our results introduce room-temperature laser-kicked molecules as a new laboratory for studies of localisation phenomena in quantum transport.

  1. MAC 5710 -Estruturas de Dados e sua Manipulac~ao URL: http://www.ime.usp.br/song/mac5710.html

    E-Print Network [OSTI]

    Song, Siang Wun

    Efici^encia ou complexidade de algoritmos Siang - 2005 (Daremos aqui um tratamento informal sobre o assunto. Maiores detalhes devem ser obtidos em cursos de An´alise de Algoritmos.) Costuma-se analisar um algoritmo em termos de tempo e espa¸co (ou mem´oria). Para o tempo, diversas medidas s~ao em princ´ipio poss

  2. InnoPOL: an EMCCD imaging polarimeter and 85-element curvature AO system on the 3.6-m AEOS telescope for cost

    E-Print Network [OSTI]

    Berdyugina, Svetlana

    telescope for cost effective polarimetric speckle suppression David Harringtona,b,d, Svetlana Berdyuginab, 2680 Woodlawn Drive, Honolulu, HI, USA, 96822; bKiepenheuer Institute for Solar Physics, Schoneck str behavior of the modulators. These models are also verified by initial EMCCD scoring camera data at AEOS

  3. arXiv:1012.0722v1[nlin.AO]3Dec2010 Topological stability criteria for synchronized coupled systems of non-identical

    E-Print Network [OSTI]

    . This indicates that be- side global structural measures of the network also the local and mesoscale that occur in subgraphs on the mesoscale. We then formulate and numerically confirm a conjecture that extends be possible to understand the in- terplay between local, global, and mesoscale constraints on stability

  4. Discrimination of quantum observables using limited resources

    E-Print Network [OSTI]

    Mario Ziman; Teiko Heinosaari

    2008-02-18

    We address the problem of unambiguous discrimination and identification among quantum observables. We set a general framework and investigate in details the case of qubit observables. In particular, we show that perfect discrimination with two shots is possible only for sharp qubit observables (e.g. Stern-Gerlach apparatuses) associated with mutually orthogonal directions. We also show that for sharp qubit observables associated to nonorthogonal directions unambiguous discrimination with an inconclusive result is always possible.

  5. JAXA's Earth Observation Program Osamu Ochiai

    E-Print Network [OSTI]

    JAXA's Earth Observation Program Osamu Ochiai Japan Aerospace Exploration Agency #12;1 Disasters Health Energy Climate Water 1 Japanese Main Activities of Earth Observation Weather MTSAT (JMA) Eco Earth Observation Targets (JFY) 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018

  6. Observation of diamond turned OFHC copper using Scanning Tunneling Microscopy

    SciTech Connect (OSTI)

    Grigg, D.A.; Russell, P.E.; Dow, T.A.

    1988-12-01

    Diamond turned OFHC copper samples have been observed within the past few months using the Scanning Tunneling Microscope. Initial results have shown evidence of artifacts which may be used to better understand the diamond turning process. The STM`s high resolution capability and three dimensional data representation allows observation and study of surface features unobtainable with conventional profilometry systems. Also, the STM offers a better quantitative means by which to analyze surface structures than the SEM. This paper discusses findings on several diamond turned OFHC copper samples having different cutting conditions. Each sample has been cross referenced using STM and SEM.

  7. SPECKLE INTERFEROMETRY AT THE USNO FLAGSTAFF STATION: OBSERVATIONS OBTAINED IN 2008 AND NINE NEW ORBITS

    SciTech Connect (OSTI)

    Hartkopf, William I.; Mason, Brian D. E-mail: bdm@usno.navy.mil

    2011-08-15

    Results are presented for 299 speckle interferometric observations of double stars, obtained in 2008 at the USNO Flagstaff Station using the 1.55 m Kaj Strand Astrometric Reflector. Separations range from 0.''15 to 9.''88, with a median of 2.''22. This observing run concentrated on neglected systems, as well as systems in need of improved orbital elements; new orbital solutions have been determined for nine systems as a result.

  8. Coordinated mm/sub-mm observations of Sagittarius A* in May 2007

    E-Print Network [OSTI]

    D. Kunneriath; A. Eckart; S. Vogel; L. Sjouwerman; H. Wiesemeyer; R. Schoedel; F. K. Baganoff; M. Morris; T. Bertram; M. Dovciak; D. Downes; W. J. Duschl; V. Karas; S. Koenig; T. Krichbaum; M. Krips; R. -S. Lu; S. Markoff; J. Mauerhan; L. Meyer; J. Moultaka; K. Muzic; F. Najarro; K. Schuster; C. Straubmeier; C. Thum; G. Witzel; M. Zamaninasab; A. Zensus

    2008-10-01

    At the center of the Milky Way, with a distance of ~8 kpc, the compact source Sagittarius A* (SgrA*) can be associated with a super massive black hole of ~4x10^6 solar masses. SgrA* shows strong variability from the radio to the X-ray wavelength domains. Here we report on simultaneous NIR/sub-millimeter/X-ray observations from May 2007 that involved the NACO adaptive optics (AO) instrument at the European Southern Observatory's Very Large Telescope, the Australian Telescope Compact Array (ATCA), the US mm-array CARMA, the IRAM 30m mm-telescope, and other telescopes. We concentrate on the time series of mm/sub-mm data from CARMA, ATCA, and the MAMBO bolometer at the IRAM 30m telescope.

  9. Multi-wavelength Observations of H 2356-309

    E-Print Network [OSTI]

    Abramowski, A; Aharonian, F; Akhperjanian, A G; Anton, G; de Almeida, U Barres; Bazer-Bachi, A R; Becherini, Y; Behera, B; Benbow, W; Bernloehr, K; Bochow, A; Boisson, C; Bolmont, J; Borrel, V; Brucker, J; Brun, F; Brun, P; Buehler, R; Bulik, T; Buesching, I; Boutelier, T; Chadwick, P M; Charbonnier, A; Chaves, R C G; Cheesebrough, A; Conrad, J; Chounet, L -M; Clapson, A C; Coignet, G; Costamante, L; Dalton, M; Daniel, M K; Davids, I D; Degrange, B; Deil, C; Dickinson, H J; Djannati-Atai, A; Domainko, W; Drury, L O'C; Dubois, F; Dubus, G; Dyks, J; Dyrda, M; Egberts, K; Eger, P; Espigat, P; Fallon, L; Farnier, C; Fegan, S; Feinstein, F; Fernandes, M V; Fiasson, A; Foerster, A; Fontaine, G; Fuessling, M; Gabici, S; Gallant, Y A; Gerard, L; Gerbig, D; Giebels, B; Glicenstein, J F; Glueck, B; Goret, P; Goering, D; Hampf, D; Hauser, M; Heinz, S; Heinzelmann, G; Henri, G; Hermann, G; Hinton, J A; Hoffmann, A; Hofmann, W; Hofverberg, P; Holleran, M; Hoppe, S; Horns, D; Jacholkowska, A; de Jager, O C; Jahn, C; Jung, I; Katarzynski, K; Katz, U; Kaufmann, S; Kerschhaggl, M; Khangulyan, D; Khelifi, B; Keogh, D; Klochkov, D; Kluzniak, W; Kneiske, T; Komin, Nu; Kosack, K; Kossakowski, R; Lamanna, G; Lenain, J -P; Lohse, T; Lu, C -C; Marandon, V; Marcowith, A; Masbou, J; Maurin, D; McComb, T J L; Medina, M C; Mehault, J; Moderski, R; Moulin, E; Naumann-Godo, M; de Naurois, M; Nedbal, D; Nekrassov, D; Nguyen, N; Nicholas, B; Niemiec, J; Nolan, S J; Ohm, S; Olive, J-F; Wilhelmi, E de Ona; Opitz, B; Orford, K J; Ostrowski, M; Panter, M; Arribas, M Paz; Pedaletti, G; Pelletier, G; Petrucci, P -O; Pita, S; Puehlhofer, G; Punch, M; Quirrenbach, A; Raubenheimer, B C; Raue, M; Rayner, S M; Reimer, O; Renaud, M; Reyes, R de los; Rieger, F; Ripken, J; Rob, L; Rosier-Lees, S; Rowell, G; Rudak, B; Rulten, C B; Ruppel, J; Ryde, F; Sahakian, V; Santangelo, A; Schlickeiser, R; Schoeck, F M; Schoenwald, A; Schwanke, U; Schwarzburg, S; Schwemmer, S; Shalchi, A; Sushch, I; Sikora, M; Skilton, J L; Sol, H; Stawarz, L; Steenkamp, R; Stegmann, C; Stinzing, F; Szostek, A; Tam, P H; Tavernet, J -P; Terrier, R; Tibolla, O; Tluczykont, M; Valerius, K; van Eldik, C; Vasileiadis, G; Venter, C; Venter, L; Vialle, J P; Viana, A; Vincent, P; Vivier, M; Voelk, H J; Volpe, F; Vorobiov, S; Wagner, S J; Ward, M; Zdziarski, A A; Zech, A; Zechlin, H -S

    2010-01-01

    AIMS: The properties of the broad-band emission from the high-frequency peaked BL Lac H 2356-309 (z=0.165) are investigated. METHODS: Very High Energy (VHE; E > 100 GeV) observations of H 2356-309 were performed with the High Energy Stereoscopic System (HESS) from 2004 through 2007. Simultaneous optical/UV and X-ray observations were made with the XMM-Newton satellite on June 12/13 and June 14/15, 2005. NRT radio observations were also contemporaneously performed in 2005. ATOM optical monitoring observations were also made in 2007. RESULTS: A strong VHE signal, ~13 sigma total, was detected by HESS after the four years HESS observations (116.8 hrs live time). The integral flux above 240 GeV is I(>240 GeV) = (3.06 +- 0.26 {stat} +- 0.61 {syst}) x 10^{-12} cm^{-2} s^{-1}, corresponding to ~1.6% of the flux observed from the Crab Nebula. A time-averaged energy spectrum is measured from 200 GeV to 2 TeV and is characterized by a power law (photon index of Gamma = 3.06 +- 0.15 {stat} +- 0.10 {syst}). Significant s...

  10. Insights from modeling and observational evaluation of a precipitating continental cumulus event observed during the MC3E field campaign

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

    Mechem, David B.; Giangrande, Scott E.; Wittman, Carly S.; Borque, Paloma; Toto, Tami; Kollias, Pavlos

    2015-03-13

    A case of shallow cumulus and precipitating cumulus congestus sampled at the Atmospheric Radiation Measurement (ARM) Program Southern Great Plains (SGP) supersite is analyzed using a multi-sensor observational approach and numerical simulation. Observations from a new radar suite surrounding the facility are used to characterize the evolving statistical behavior of the precipitating cloud system. This is accomplished using distributions of different measures of cloud geometry and precipitation properties. Large-eddy simulation (LES) with size-resolved (bin) microphysics is employed to determine the forcings most important in producing the salient aspects of the cloud system captured in the radar observations. Our emphasis ismore »on assessing the importance of time-varying vs. steady-state large-scale forcing on the model's ability to reproduce the evolutionary behavior of the cloud system. Additional consideration is given to how the characteristic spatial scale and homogeneity of the forcing imposed on the simulation influences the evolution of cloud system properties. Results indicate that several new scanning radar estimates such as distributions of cloud top are useful to differentiate the value of time-varying (or at least temporally well-matched) forcing on LES solution fidelity.« less

  11. High speed imaging television system

    DOE Patents [OSTI]

    Wilkinson, William O. (Silver Spring, MD); Rabenhorst, David W. (Silver Spring, MD)

    1984-01-01

    A television system for observing an event which provides a composite video output comprising the serially interlaced images the system is greater than the time resolution of any of the individual cameras.

  12. Process Cooling Pumping Systems Analysis 

    E-Print Network [OSTI]

    Sherman, C.

    2008-01-01

    An analysis of the mill water pumping systems at a North American manufacturing facility was conducted late las year and the following issues were observed: 1. Overpumping – Both systems were overpumped to a significant degree against...

  13. Filtering with Marked Point Process Observations via Poisson Chaos Expansion

    SciTech Connect (OSTI)

    Sun Wei; Zeng Yong; Zhang Shu

    2013-06-15

    We study a general filtering problem with marked point process observations. The motivation comes from modeling financial ultra-high frequency data. First, we rigorously derive the unnormalized filtering equation with marked point process observations under mild assumptions, especially relaxing the bounded condition of stochastic intensity. Then, we derive the Poisson chaos expansion for the unnormalized filter. Based on the chaos expansion, we establish the uniqueness of solutions of the unnormalized filtering equation. Moreover, we derive the Poisson chaos expansion for the unnormalized filter density under additional conditions. To explore the computational advantage, we further construct a new consistent recursive numerical scheme based on the truncation of the chaos density expansion for a simple case. The new algorithm divides the computations into those containing solely system coefficients and those including the observations, and assign the former off-line.

  14. Anomalous transport and observable average in the standard map

    E-Print Network [OSTI]

    Lydia Bouchara; Ouerdia Ourrad; Sandro Vaienti; Xavier Leoncini

    2015-09-02

    The distribution of finite time observable averages and transport in low dimensional Hamiltonian systems is studied. Finite time observable average distributions are computed, from which an exponent $\\alpha$ characteristic of how the maximum of the distributions scales with time is extracted. To link this exponent to transport properties, the characteristic exponent $\\mu(q)$ of the time evolution of the different moments of order $q$ related to transport are computed. As a testbed for our study the standard map is used. The stochasticity parameter $K$ is chosen so that either phase space is mixed with a chaotic sea and islands of stability or with only a chaotic sea. Our observations lead to a proposition of a law relating the slope in $q=0$ of the function $\\mu(q)$ with the exponent $\\alpha$.

  15. VERITAS Observations of the Nova in V407 Cygni

    E-Print Network [OSTI]

    Aliu, E; Arlen, T; Aune, T; Beilicke, M; Benbow, W; Bouvier, A; Bradbury, S M; Buckley, J H; Bugaev, V; Byrum, K; Cannon, A; Cesarini, A; Ciupik, L; Collins-Hughes, E; Connolly, M P; Cui, W; Decerprit, G; Dickherber, R; Duke, C; Dumm, J; Dwarkadas, V V; Errando, M; Falcone, A; Feng, Q; Finley, J P; Finnegan, G; Fortson, L; Furniss, A; Galante, N; Gall, D; Godambe, S; Griffin, S; Grube, J; Gyuk, G; Hanna, D; Holder, J; Huan, H; Hughes, G; Humensky, T B; Kaaret, P; Karlsson, N; Kertzman, M; Khassen, Y; Kieda, D; Krawczynski, H; Krennrich, F; Lang, M J; Lee, K; Maier, G; Majumdar, P; McArthur, S; McCann, A; Millis, J; Moriarty, P; Mukherjee, R; Nuñez, P D; Ong, R A; Orr, M; Otte, A N; Pandel, D; Park, N; Perkins, J S; Pohl, M; Prokoph, H; Quinn, J; Ragan, K; Reyes, L C; Reynolds, P T; Roache, E; Rose, H J; Ruppel, J; Saxon, D B; Schroedter, M; Sembroski, G H; Skole, C; Smith, A W; Staszak, D; Telezhinsky, I; Teši?, G; Theiling, M; Thibadeau, S; Tsurusaki, K; Tyler, J; Varlotta, A; Vincent, S; Vivier, M; Wakely, S P; Ward, J E; Weekes, T C; Weinstein, A; Weisgarber, T; Welsing, R; Williams, D A; Zitzer, B

    2012-01-01

    We report on very high energy (E > 100 GeV) gamma-ray observations of V407 Cygni, a symbiotic binary that underwent a nova outburst producing 0.1-10 GeV gamma rays during 2010 March 10-26. Observations were made with the Very Energetic Radiation Imaging Telescope Array System during 2010 March 19-26 at relatively large zenith angles, due to the position of V407 Cyg. An improved reconstruction technique for large zenith angle observations is presented and used to analyze the data. We do not detect V407 Cygni and place a differential upper limit on the flux at 1.6 TeV of 2.3 \\times 10^(-12) erg cm^(-2) s^(-1) (at the 95% confidence level). When considered jointly with data from Fermi-LAT, this result places limits on the acceleration of very high energy particles in the nova.

  16. CCD Observing Manual 49 Bay State Road

    E-Print Network [OSTI]

    Zallen, Richard

    Stars 5.6. Supernovae/Novae Patrols 5.7. Designing Your Own: Using AAVSO VSX 6.0 Observing Techniques 6

  17. EA-1964: National Ecological Observation Network (NEON)

    Broader source: Energy.gov [DOE]

    The National Science Foundation (NSF) prepared an EA that evaluated potential environmental impacts of the proposed National Ecological Observation Network (NEON), a continental-scale network of...

  18. Observational Field Assessment of Invasiveness for

    E-Print Network [OSTI]

    Eucalyptus grandis observations..................................................... 13 Eucalyptus grandis), Eucalyptus grandis, African oil palm (Elaeis guineensis) and arboreal Leucaenas found on Oahu, Maui, Hawai

  19. Self-potential observations during hydraulic fracturing

    E-Print Network [OSTI]

    Moore, J R; Glaser, Steven D

    2007-01-01

    potential measurements during hydraulic fracturing of BunterSP response during hydraulic fracturing. Citation: Moore, J.observations during hydraulic fracturing, J. Geophys. Res. ,

  20. Self-potential observations during hydraulic fracturing

    E-Print Network [OSTI]

    Moore, J R; Glaser, Steven D

    2007-01-01

    during hydraulic fracturing of Bunter sandstones, Proc. NearSP response during hydraulic fracturing. Citation: Moore, J.observations during hydraulic fracturing, J. Geophys. Res. ,

  1. Cluster Observations with the South Pole Telescope

    E-Print Network [OSTI]

    Plagge, Thomas Jeffrey

    2009-01-01

    The South Pole Telescope during the last stages ofwater vapor at the South Pole relative to two otherSZ Survey Instrument . 3 The South Pole Telescope Observing

  2. Radioactivity in Precipitation: Methods and Observations from...

    Office of Environmental Management (EM)

    Radioactivity in Precipitation: Methods & Observations from Savannah River Site Dennis Jackson P.E. & Timothy Jannik - Savannah River National Laboratory Teresa Eddy - Savannah...

  3. SBAC-PAD'2000 12th Symposium on Computer Architecture and High Performance Computing -S~ao Pedro -SP 83

    E-Print Network [OSTI]

    Cruz, Frederico

    in many con- texts such as telecommunication, transportation, or electric power sys- tems. A new model instruction stream, mul- tiple data stream) parallel computation systems. Thus, the implemen- tations are very problems I. INTRODUCTION A. Motivation and Problem Statement In order to guarantee quality of service (Qo

  4. Monop olos e Curvas Alg ebricas -Curso de Mestrado em Matem atica Aplicada -IST Jo~ao Pimentel Nunes

    E-Print Network [OSTI]

    Nunes, João Pimentel

    .Univ.Press, 1988. - M. Atiyah e N. Hitchin, \\Low Energy Scattering of Non-abelian Monopoles", Phys.Lett. A107 (1985) 21. - M. Atiyah e N. Hitchin, \\Low Energy Scattering of Non-abelian Magnetic Monopoles", Phil;emin.Math.Sup. 105, Les Presses Univ. de Montr#19;eal, 1987. - N. Hitchin, \\Integrable Systems

  5. Hybrid Modeling of Communication Networks Using Modelica Daniel Farnqvist, Katrin Strandemar, Karl Henrik Johansson, and Jo~ao Pedro Hespanha

    E-Print Network [OSTI]

    Hespanha, João Pedro

    Hybrid Modeling of Communication Networks Using Modelica Daniel F¨arnqvist, Katrin Strandemar networks using Modelica is discussed. Congestion control in packet-switched networks, such as the Internet, by develop- ing a model library based on a recent hybrid systems model, that Modelica provides an efficient

  6. Sodium laser guide star system at Lawrence Livermore National Laboratory: System description and experimental results

    SciTech Connect (OSTI)

    Avicola, K.; Brase, J.; Morris, J.

    1994-03-02

    The architecture and major system components of the sodium-layer kw guide star system at LLNL will be described, and experimental results reported. The subsystems include the laser system, the beam delivery system including a pulse stretcher and beam pointing control, the beam director, and the telescope with its adaptive-optics package. The laser system is one developed for the Atomic Vapor Laser Isotope Separation (AVLIS) Program. This laser system can be configured in various ways in support of the AVLIS program objectives, and was made available to the guide star program at intermittent times on a non-interference basis. The first light transmitted into the sky was in July of 1992, at a power level of 1. 1 kW. The laser pulse width is about 32 ns, and the pulse repetition rate was 26 kHz for the 1. 1 kW configuration and 13 kHz for a 400 W configuration. The laser linewidth is tailored to match the sodium D{sub 2} absorption line, and the laser system has active control of beam pointing and wavefront quality. Because of the short pulse length the sodium transition is saturated and the laser power is not efficiently utilized. For this reason a pulse stretcher was developed, and the results of this effort will be reported. The beam is delivered via an evacuated pipe from the laser building to the guide star site, a distance of about 100 meters, and then launched vertically. A beam director provides the means to track the sky in the full AO system, but was not used in the experiments reported here. The return signal is collected by a 1/2 meter telescope with the AO package. This telescope is located 5 meters from the km launch tube. Smaller packages for photometry, wavefront measurement, and spot image and motion analysis have been used. Although the unavailability of the AVLIS laser precluded a full AO system demonstration, data supporting feasibility and providing input to the system design for a Lick Observatory AO system was obtained.

  7. Observation of Parametric Instability in Advanced LIGO

    E-Print Network [OSTI]

    Evans, Matthew; Fritschel, Peter; Miller, John; Barsotti, Lisa; Martynov, Denis; Brooks, Aidan; Coyne, Dennis; Abbott, Rich; Adhikari, Rana; Arai, Koji; Bork, Rolf; Kells, Bill; Rollins, Jameson; Smith-Lefebvre, Nicolas; Vajente, Gabriele; Yamamoto, Hiroaki; Derosa, Ryan; Effler, Anamaria; Kokeyama, Keiko; Betzweiser, Joseph; Frolov, Valera; Mullavey, Adam; O`Reilly, Brian; Dwyer, Sheila; Izumi, Kiwamu; Kawabe, Keita; Landry, Michael; Sigg, Daniel; Ballmer, Stefan; Massinger, Thomas J; Staley, Alexa; Mueller, Chris; Grote, Hartmut; Ward, Robert; King, Eleanor; Blair, David; Ju, Li; Zhao, Chunnong

    2015-01-01

    Parametric instabilities have long been studied as a potentially limiting effect in high-power interferometric gravitational wave detectors. Until now, however, these instabilities have never been observed in a kilometer-scale interferometer. In this work we describe the first observation of parametric instability in an Advanced LIGO detector, and the means by which it has been removed as a barrier to progress.

  8. Micro-electromechanical systems spatial light modulator development S. Oliviera, p Bierden", T. Bifanoc, D. Bjshop", E. Carr, w. Cowan, M. M. P.

    E-Print Network [OSTI]

    Bifano, Thomas

    Micro-electromechanical systems spatial light modulator development S. Oliviera, p Bierden", T optics, spatial light modulator, micro-electromechanical systems , MEMS,microfabrication INTRODUCTION One advanced AO systems with major new capabilities. A main thrust of this effort is focused on micro-electromechanical

  9. 1.0 Espa,cos de Banach de se,c"oes de um fibrado vetorial. Definiremos nesta se,c"ao v'arios espa,cos vetoriais de se,c"oes de um fibr*

    E-Print Network [OSTI]

    Tausk, Daniel Victor

    1.0 Espa,cos de Banach de se,c"oes de um fibrado vetorial. Definiremos nesta se,c"ao v'arios espa,cos vetoriais de se,c"oes de um fibr* *ado vetorial sobre uma variedade compacta (possivelmente com bordo). Definiremos normas nestes esp* *a,cos mediante as quais eles se tornar"ao espa,cos de

  10. Proceedings of the 9th Brazilian Symposium in Information and Human Language Technology, pages 110, Fortaleza, CE, Brazil, October 2123, 2013. c 2013 Sociedade Brasileira de Computac~ao

    E-Print Network [OSTI]

    ´afica ­ AgreeCalc ­ projetada para o c´alculo autom´atico do grau de concord^ancia en- tre m´ultiplos anotadores´em permite (i) a aplicac¸~ao de filtros aos dados usados para o c´alculo desses coeficientes; (ii que haja um n´umero razo´avel de maneiras diferentes de quantific´a- la, indo desde c´alculos mais

  11. Observed Cosmological Redshifts Support Contracting Accelerating Universe

    E-Print Network [OSTI]

    Branislav Vlahovic

    2012-07-02

    The main argument that Universe is currently expanding is observed redshift increase by distance. However, this conclusion may not be correct, because cosmological redshift depends only on the scaling factors, the change in the size of the universe during the time of light propagation and is not related to the speed of observer or speed of the object emitting the light. An observer in expanding universe will measure the same redshift as observer in contracting universe with the same scaling. This was not taken into account in analysing the SN Ia data related to the universe acceleration. Possibility that universe may contract, but that the observed light is cosmologically redshifted allows for completely different set of cosmological parameters $\\Omega_M, \\Omega_{\\Lambda}$, including the solution $\\Omega_M=1, \\Omega_{\\Lambda}=0$. The contracting and in the same time accelerating universe explains observed deceleration and acceleration in SN Ia data, but also gives significantly larger value for the age of the universe, $t_0 = 24$ Gyr. This allows to reconsider classical cosmological models with $\\Lambda =0$. The contracting stage also may explain the observed association of high redshifted quasars to low redshifted galaxies.

  12. Quantum observables, Lie algebra homology and TQFT

    E-Print Network [OSTI]

    Albert Schwarz

    1999-04-25

    Let us consider a Lie (super)algebra $G$ spanned by $T_{\\alpha}$ where $T_{\\alpha}$ are quantum observables in BV-formalism. It is proved that for every tensor $c^{\\alpha_1...\\alpha_k}$ that determines a homology class of the Lie algebra $G$ the expression $c^{\\alpha_1...\\alpha_k}T_{\\alpha _1}...T_{\\alpha_k}$ is again a quantum observables. This theorem is used to construct quantum observables in BV sigma-model. We apply this construction to explain Kontsevich's results about the relation between homology of the Lie algebra of Hamiltonian vector fields and topological invariants of manifolds.

  13. High-angular resolution observations of the Pistol Star

    E-Print Network [OSTI]

    Martayan, Christophe; Bouquin, Jean-Baptiste Le; Merand, Antoine; Montagnier, Guillaume; Selman, Fernando; Girard, Julien; Fox, Andrew; Baade, Dietrich; Fremat, Yves; Lobel, Alex; Martins, Fabrice; Patru, Fabien; Rivinius, Thomas; Sana, Hugues; Stefl, Stan; Zorec, Jean; Semaan, Thierry

    2010-01-01

    First results of near-IR adaptive optics (AO)-assisted imaging, interferometry, and spectroscopy of this Luminous Blue Variable (LBV) are presented. They suggest that the Pistol Star is at least double. If the association is physical, it would reinforce questions concerning the importance of multiplicity for the formation and evolution of extremely massive stars.

  14. Observation of Parametric Instability in Advanced LIGO

    E-Print Network [OSTI]

    Gras, Slawek

    Parametric instabilities have long been studied as a potentially limiting effect in high-power interferometric gravitational wave detectors. Until now, however, these instabilities have never been observed in a kilometer-scale ...

  15. Initial Helioseismic Observations by Hinode/SOT

    E-Print Network [OSTI]

    Takashi Sekii; Alexander G. Kosovichev; Junwei Zhao; Saku Tsuneta; Hiromoto Shibahashi; Thomas E. Berger; Kiyoshi Ichimoto; Yukio Katsukawa; Bruce W. Lites; Shin'ichi Nagata; Toshifumi Shimizu; Richard A. Shine; Yoshinori Suematsu; Theodore D. Tarbell; Alan M. Title

    2007-09-12

    Results from initial helioseismic observations by Solar Optical Telescope onboard Hinode are reported. It has been demonstrated that intensity oscillation data from Broadband Filter Imager can be used for various helioseismic analyses. The k-omega power spectra, as well as corresponding time-distance cross-correlation function that promises high-resolution time-distance analysis below 6-Mm travelling distance, were obtained for G-band and CaII-H data. Subsurface supergranular patterns have been observed from our first time-distance analysis. The results show that the solar oscillation spectrum is extended to much higher frequencies and wavenumbers, and the time-distance diagram is extended to much shorter travel distances and times than they were observed before, thus revealing great potential for high-resolution helioseismic observations from Hinode.

  16. Derivation of evolutionary payoffs from observable behavior

    E-Print Network [OSTI]

    Feigel, Alexander; Engel, Assaf

    2008-01-01

    Interpretation of animal behavior, especially as cooperative or selfish, is a challenge for evolutionary theory. Strategy of a competition should follow from corresponding Darwinian payoffs for the available behavioral options. The payoffs and decision making processes, however, are difficult to observe and quantify. Here we present a general method for the derivation of evolutionary payoffs from observable statistics of interactions. The method is applied to combat of male bowl and doily spiders, to predator inspection by sticklebacks and to territorial defense by lions, demonstrating animal behavior as a new type of game theoretical equilibrium. Games animals play may be derived unequivocally from their observable behavior, the reconstruction, however, can be subjected to fundamental limitations due to our inability to observe all information exchange mechanisms (communication).

  17. New York/Region Opinions Editorial Observer

    E-Print Network [OSTI]

    Pianka, Eric R.

    New York/Region Opinions Editorial Observer Grasping the Depth of Time as a First Step of us. The idea of such quantities of time is extremely new. Humans began to understand the true scale

  18. Observational learning in an uncertain world

    E-Print Network [OSTI]

    Acemoglu, Daron

    We study a model of observational learning in social networks in the presence of uncertainty about agents' type distributions. Each individual receives a private noisy signal about a payoff-relevant state of the world, and ...

  19. On the consistent use of Constructed Observables

    E-Print Network [OSTI]

    Trott, Michael

    2015-01-01

    We define "constructed observables" as relating experimental measurements to terms in a Lagrangian while simultaneously making assumptions about possible deviations from the Standard Model (SM), in other Lagrangian terms. Ensuring that the SM effective field theory (EFT) is constrained correctly when using constructed observables requires that their defining conditions are imposed on the EFT in a manner that is consistent with the equations of motion. Failing to do so can result in a "functionally redundant" operator basis and the wrong expectation as to how experimental quantities are related in the EFT. We illustrate the issues involved considering the $\\rm S$ parameter and the off shell triple gauge coupling (TGC) verticies. We show that the relationships between $h \\rightarrow V \\bar{f} \\, f$ decay and the off shell TGC verticies are subject to these subtleties, and how the connections between these observables vanish in the limit of strong bounds due to LEP. The challenge of using constructed observables...

  20. Emerging local warming signals in observational data

    E-Print Network [OSTI]

    Mahlstein, Irina

    The global average temperature of the Earth has increased, but year-to-year variability in local climates impedes the identification of clear changes in observations and human experience. For a signal to become obvious in ...

  1. First Detection of NaI D lines in High-Redshift Damped Lyman-alpha Systems

    E-Print Network [OSTI]

    Kondo, S; Gässler, W; Hayano, Y; Iye, M; Kamata, Y; Kanzawa, T; Kobayashi, N; Minowa, Y; Nedachi, K; Oya, S; Pyo, T S; Saint-Jacques, D; Takami, H; Takato, N; Terada, H; Tokunaga, A; Tsujimoto, T; Churchill, Christopher W.; Gaessler, Wolfgang; Hayano, Yutaka; Iye, Masanori; Kamata, Yukiko; Kanzawa, Tomio; Kobayashi, Naoto; Kondo, Sohei; Minowa, Yosuke; Nedachi, Ko; Oya, Shin; Pyo, Tae-Soo; Takami, Hideki; Takato, Naruhisa; Terada, Hiroshi; Tokunaga, Alan; Tsujimoto, Takuji

    2006-01-01

    A Near-infrared (1.18-1.35 micron) high-resolution spectrum of the gravitationally-lensed QSO APM 08279+5255 was obtained with the IRCS mounted on the Subaru Telescope using the AO system. We detected strong NaI D 5891,5897 doublet absorption in high-redshift DLAs at z=1.062 and 1.181, confirming the presence of NaI, which was first reported for the rest-frame UV NaI 3303.3,3303.9 doublet by Petitjean et al. This is the first detection of NaI D absorption in a high-redshift (z>1) DLA. In addition, we detected a new NaI component in the z=1.062 DLA and four new components in the z=1.181 DLA. Using an empirical relationship between NaI and HI column density, we found that all "components" have large HI column density, so that each component is classified as DLA absorption. We also detected strong NaI D absorption associated with a MgII system at z=1.173. Because no other metal absorption lines were detected in this system at the velocity of the NaI absorption in previously reported optical spectra (observed 3.6...

  2. Observing motor learning produces somatosensory change Nicol F. Bernardi,1,2

    E-Print Network [OSTI]

    Malfait, Nicole

    Observing motor learning produces somatosensory change Nicolò F. Bernardi,1,2 Mohammad Darainy,1, Darainy M, Bricolo E, Ostry DJ. Observing motor learning produces somatosensory change. J Neurophysiol 110 of others has been shown to affect motor learning, but does it have effects on sensory systems as well

  3. Observing Unit Test Maturity in the Wild Ilja Heitlager, Tobias Kuipers, Joost Visser

    E-Print Network [OSTI]

    Visser, Joost

    1 1 Observing Unit Test Maturity in the Wild Ilja Heitlager, Tobias Kuipers, Joost Visser Software. Abstract This talk provides an anecdotal account of unit testing maturity and its evolution in Dutch were used to construct, and to test these systems. Unit testing, specifically, was observed by us

  4. Camera-based Observation of Football Games for Analyzing Multi-agent Activities

    E-Print Network [OSTI]

    Camera-based Observation of Football Games for Analyzing Multi-agent Activities Michael Beetz beetz-based observation system for foot- ball games that is used for the automatic analysis of football games and challenging domain in the multi-agent com- munity is football -- in particular in the context of the Robo

  5. Observation of an Interedge Magnetoplasmon Mode in a Degenerate Two-Dimensional Electron Gas

    E-Print Network [OSTI]

    Hohls, Frank

    detection of edge states in the quantum Hall regime. At filling factors close to 3 we observe two densities was experimentally observed up to now only in a classical system of surface electrons on helium [9 magnetoplasmons. Using selective detection of edge states we can distinguish two wave packets of edge excitations

  6. Observation of the 0-fs pulse

    E-Print Network [OSTI]

    Zare, Richard N.

    Observation of the 0-fs pulse By W.H. Knox, R.S. Knox,J.F.Hoose, and R.N. Zare T he quest for the world's shor test laser pulse has led to a re markable pace of develop ment in ultrafast laser technology. Al though pulses of only a few cycles duration have been made, clearly the observation of a 0-fs

  7. Gamma-Ray Line Observations with RHESSI

    E-Print Network [OSTI]

    David M. Smith

    2004-04-30

    The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) has been observing gamma-ray lines from the Sun and the Galaxy since its launch in February 2002. Here I summarize the status of RHESSI observations of solar lines (nuclear de-excitation, neutron capture, and positron annihilation), the lines of $^{26}$Al and $^{60}$Fe from the inner Galaxy, and the search for positron annihilation in novae.

  8. The Solar System as an Exoplanetary System

    E-Print Network [OSTI]

    Martin, Rebecca G

    2015-01-01

    With the availability of considerably more data, we revisit the question of how special our Solar System is, compared to observed exoplanetary systems. To this goal, we employ a mathematical transformation that allows for a meaningful, statistical comparison. We find that the masses and densities of the giant planets in our Solar System are very typical, as is the age of the Solar System. While the orbital location of Jupiter is somewhat of an outlier, this is most likely due to strong selection effects towards short-period planets. The eccentricities of the planets in our Solar System are relatively small compared to those in observed exosolar systems, but still consistent with the expectations for an 8-planet system (and could, in addition, reflect a selection bias towards high-eccentricity planets). The two characteristics of the Solar System that we find to be most special are the lack of super-Earths with orbital periods of days to months and the general lack of planets inside of the orbital radius of Me...

  9. Braking system

    DOE Patents [OSTI]

    Norgren, D.U.

    1982-09-23

    A balanced braking system comprising a plurality of braking assemblies located about a member to be braked. Each of the braking assemblies consists of a spring biased piston of a first material fitted into a body of a different material which has a greater contraction upon cooling than the piston material. The piston is provided with a recessed head portion over which is positioned a diaphragm and forming a space therebetween to which is connected a pressurized fluid supply. The diaphragm is controlled by the fluid in the space to contact or withdraw from the member to be braked. A cooling means causes the body within which the piston is fitted to contract more than the piston, producing a tight shrink fit therebetween. The braking system is particularly applicable for selectively braking an arbor of an electron microscope which immobilizes, for example, a vertically adjustable low temperature specimen holder during observation. The system provides balanced braking forces which can be easily removed and re-established with minimal disturbance to arbor location.

  10. Optical SETI Observations of the Anomalous Star KIC 8462852

    E-Print Network [OSTI]

    Schuetz, Marlin; Shostak, Seth; Richards, Jon

    2015-01-01

    To explore the hypothesis that KIC 8462852's aperiodic dimming is caused by artificial megastructures in orbit (Wright et al. 2015), rather than a natural cause such as cometary fragments in a highly elliptical orbit (Marengo et al. 2015), we searched for electromagnetic signals from KIC 8462852 indicative of extraterrestrial intelligence. The primary observations were in the visible optical regime using the Boquete Optical SETI Observatory in Panama. In addition, as a preparatory exercise for the possible future detection of a candidate signal (Heidmann 1991), three of six observing runs simultaneously searched radio frequencies at the Allen Telescope Array in California. No periodic optical signals greater than 67 photons/m2 within a time frame of 25 ns were seen. This limit corresponds to isotropic optical pulses of 8E22 joules. If, however, any inhabitants of KIC 8462852 were targeting our solar system (Shostak & Villard 2004), the required energy would be reduced greatly. The limits on narrowband rad...

  11. Accreting X-ray millisecond pulsars observed with INTEGRAL

    E-Print Network [OSTI]

    Maurizio Falanga

    2007-11-07

    I review the properties of three X-ray accreting millisecond pulsars observed with INTEGRAL. Out of seven recently discovered accretion-powered pulsars (one discovered by INTEGRAL), three were observed with the INTEGRAL satellite up to 300 keV. Detailed timing and spectral results will be presented, including data obtained during the most recent outburst of the pulsar HETE J1900.1-2455. Accreting X-ray millisecond pulsars are key systems to understand the spin and accretion history of neutron stars. They are also a good laboratory in which to study the source spectra, pulse profile, and phase shift between X-ray pulses in different energy ranges which give additional information of the X-ray production processes and emission environment.

  12. OBSERVING CORONAL NANOFLARES IN ACTIVE REGION MOSS

    SciTech Connect (OSTI)

    Testa, Paola; DeLuca, Ed; Golub, Leon; Korreck, Kelly; Weber, Mark; De Pontieu, Bart; Martinez-Sykora, Juan; Title, Alan; Hansteen, Viggo; Cirtain, Jonathan; Winebarger, Amy; Kobayashi, Ken; Kuzin, Sergey; Walsh, Robert; DeForest, Craig

    2013-06-10

    The High-resolution Coronal Imager (Hi-C) has provided Fe XII 193A images of the upper transition region moss at an unprecedented spatial ({approx}0.''3-0.''4) and temporal (5.5 s) resolution. The Hi-C observations show in some moss regions variability on timescales down to {approx}15 s, significantly shorter than the minute-scale variability typically found in previous observations of moss, therefore challenging the conclusion of moss being heated in a mostly steady manner. These rapid variability moss regions are located at the footpoints of bright hot coronal loops observed by the Solar Dynamics Observatory/Atmospheric Imaging Assembly in the 94 A channel, and by the Hinode/X-Ray Telescope. The configuration of these loops is highly dynamic, and suggestive of slipping reconnection. We interpret these events as signatures of heating events associated with reconnection occurring in the overlying hot coronal loops, i.e., coronal nanoflares. We estimate the order of magnitude of the energy in these events to be of at least a few 10{sup 23} erg, also supporting the nanoflare scenario. These Hi-C observations suggest that future observations at comparable high spatial and temporal resolution, with more extensive temperature coverage, are required to determine the exact characteristics of the heating mechanism(s).

  13. The physics of Reionization: processes relevant for SKA observations

    E-Print Network [OSTI]

    Semelin, Benoit

    2015-01-01

    The local intensity of the 21 cm signal emitted during the Epoch of Reionization that will be mapped by the SKA is modulated by the amount of neutral hydrogen. Consequently, understanding the process of reionization of the intergalactic medium (IGM) is crucial for predicting and interpreting the upcoming observations. After presenting the basic physics and most meaningful quantities pertaining to the process of reionization, we will review recent progress in our understanding of the production and escape of ionizing photons in primordial galaxies and of their absorption in the IGM especially in so-called minihalos and Lyman Limit Systems.

  14. Observations of Radio Giant Pulses with GAVRT

    E-Print Network [OSTI]

    Jones, Glenn

    2015-01-01

    Radio giant pulses provide a unique opportunity to study the pulsar radio emission mechanism in exquisite detail. Previous studies have revealed a wide range of properties and phenomena, including extraordinarily high brightness temperatures, sub-nanosecond emission features, and banded dynamic spectra. New measurements of giant pulse characteristics can help guide and test theoretical emission models. To this end, an extensive observation campaign has begun which will provide more than 500 hours on the Crab with a 34-meter antenna located in California, USA. The observations are being done as part of an educational outreach program called the Goldstone-Apple Valley Radio Telescope (GAVRT). This antenna has a novel wide bandwidth receiver which provides up to 8 GHz of instantaneous bandwidth in the range of 2.5 to 14 GHz. These observations will provide detailed information about the variability, amplitude distribution, and detailed frequency structure of radio giant pulses. In addition, a database of pulses ...

  15. Recent Results from Observations of Accreting Pulsars

    E-Print Network [OSTI]

    Nishikawa, Ken-Ichi

    a wealth of new information on binary systems containing a magnetized neutron star accreting from a stellar companion. In particular, the all­sky monitoring capability of the BATSE instrument has allowed the first systems. These have given new insights into the processes by which mass and angular momentum are exchanged

  16. Black Holes: from Speculations to Observations

    E-Print Network [OSTI]

    Thomas W. Baumgarte

    2006-04-13

    This paper provides a brief review of the history of our understanding and knowledge of black holes. Starting with early speculations on ``dark stars'' I discuss the Schwarzschild "black hole" solution to Einstein's field equations and the development of its interpretation from "physically meaningless" to describing the perhaps most exotic and yet "most perfect" macroscopic object in the universe. I describe different astrophysical black hole populations and discuss some of their observational evidence. Finally I close by speculating about future observations of black holes with the new generation of gravitational wave detectors.

  17. AMBER/VLTI high spectral resolution observations of the Br$\\gamma$ emitting region in HD 98922. A compact disc wind launched from the inner disc region

    E-Print Network [OSTI]

    Garatti, A Caratti o; Lopez, R Garcia; Kraus, S; Schertl, D; Grinin, V P; Weigelt, G; Hofmann, K -H; Massi, F; Lagarde, S; Vannier, M; Malbet, F

    2015-01-01

    We analyse the main physical parameters and the circumstellar environment of the young Herbig Be star HD 98922. We present AMBER/VLTI high spectral resolution (R =12000) interferometric observations across the Br$\\gamma$ line, accompanied by UVES high-resolution spectroscopy and SINFONI-AO assisted near-infrared integral field spectroscopic data. To interpret our observations, we develop a magneto-centrifugally driven disc-wind model. Our analysis of the UVES spectrum shows that HD 98922 is a young (~5x10^5 yr) Herbig Be star (SpT=B9V), located at a distance of 440(+60-50) pc, with a mass accretion rate of ~9+/-3x10^(-7) M_sun yr^(-1). SINFONI K-band AO-assisted imaging shows a spatially resolved circumstellar disc-like region (~140 AU in diameter) with asymmetric brightness distribution. Our AMBER/VLTI UT observations indicate that the Br$\\gamma$ emitting region (radius ~0.31+/-0.04 AU) is smaller than the continuum emitting region (inner dust radius ~0.7+/-0.2 AU), showing significant non-zero V-shaped diff...

  18. Seasonal subsidence and rebound in Las Vegas Valley, Nevada, observed by synthetic aperture radar interferometry

    E-Print Network [OSTI]

    Amelung, Falk

    Seasonal subsidence and rebound in Las Vegas Valley, Nevada, observed by synthetic aperture radar in the subsidence and rebound occurring over stressed aquifer systems, in conjunction with measurements, generally permanent aquifer system compaction and land subsidence at yearly and longer timescales, caused

  19. Local observability of state variables and parameters in nonlinear modeling quantified by delay reconstruction

    E-Print Network [OSTI]

    Parlitz, Ulrich; Luther, Stefan

    2015-01-01

    Features of the Jacobian matrix of the delay coordinates map are exploited for quantifying the robustness and reliability of state and parameter estimations for a given dynamical model using an observed time series. Relevant concepts of this approach are introduced and illustrated for discrete and continuous time systems employing a filtered H\\'enon map and a R\\"ossler system.

  20. 3. Computing Observables Computer simulation methods are by now an established tool in many

    E-Print Network [OSTI]

    Heermann, Dieter W.

    3. Computing Observables Computer simulation methods are by now an established tool in many branches of science. The motivations for computer simulations of physical systems are manifold. One-type approximation. With a computer simulation we have the ability to study systems not yet tractable with analytical

  1. Observables can be tailored to change the entanglement of any pure state

    SciTech Connect (OSTI)

    Harshman, N. L.; Ranade, Kedar S.

    2011-07-15

    We show that, for a finite-dimensional Hilbert space, there exist observables that induce a tensor product structure such that the entanglement properties of any pure state can be tailored. In particular, we provide an explicit, finite method for constructing observables in an unstructured d-dimensional system so that an arbitrary known pure state has any Schmidt decomposition with respect to an induced bipartite tensor product structure. In effect, this article demonstrates that, in a finite-dimensional Hilbert space, entanglement properties can always be shifted from the state to the observables and all pure states are equivalent as entanglement resources in the ideal case of complete control of observables.

  2. Library System Library System

    E-Print Network [OSTI]

    Cinabro, David

    Library System #12;Library System 5150 Anthony Wayne Drive David Adamany Undergraduate Library that for the current fiscal year, we've been given an additional $600,000 for our library materials budget. We're very subscriptions. The Wayne State University Libraries are deeply committed to providing our faculty and students

  3. MICRO-CHP System for Residential Applications

    SciTech Connect (OSTI)

    Joseph Gerstmann

    2009-01-31

    This is the final report of progress under Phase I of a project to develop and commercialize a micro-CHP system for residential applications that provides electrical power, heating, and cooling for the home. This is the first phase of a three-phase effort in which the residential micro-CHP system will be designed (Phase I), developed and tested in the laboratory (Phase II); and further developed and field tested (Phase III). The project team consists of Advanced Mechanical Technology, Inc. (AMTI), responsible for system design and integration; Marathon Engine Systems, Inc. (MES), responsible for design of the engine-generator subsystem; AO Smith, responsible for design of the thermal storage and water heating subsystems; Trane, a business of American Standard Companies, responsible for design of the HVAC subsystem; and AirXchange, Inc., responsible for design of the mechanical ventilation and dehumidification subsystem.

  4. Equivalences on Observable Processes Irek Ulidowski

    E-Print Network [OSTI]

    Ulidowski, Irek

    and finitely observable. We define copy+refusal testing equivalence as indistinguishabil- ity by copy, provided their operational meaning is defined by realistically implementable transition rules. Process behaviour which can be established by so-called local testing but not global testing is called locally

  5. Experimental Observation of Bonding Electrons in Proteins*

    E-Print Network [OSTI]

    Experimental Observation of Bonding Electrons in Proteins* (Received for publication, April 15 enables bonding details of electron distributions in proteins to be revealed experimentally for the first time. We move one step closer to imaging directly the fine details of the electronic structure on which

  6. Energy flow observables in hadronic collisions

    E-Print Network [OSTI]

    F. Hautmann

    2012-05-24

    We present recent QCD calculations of energy flow distributions associated with the production of jets at wide rapidity separations in high-energy hadron collisions, and discuss the role of these observables to analyze contributions from parton showering and from multiple parton collisions.

  7. OH Maser Observations of Planetary Nebulae Precursors

    E-Print Network [OSTI]

    R. M. Deacon; J. M. Chapman; A. J. Green

    2004-06-08

    We present OH maser observations at 1612, 1665, 1667, and 1720 MHz for 86 post-asymptotic giant branch (post-AGB) stars selected from a survey of 1612 MHz maser sources in the Galactic Plane. The observations were taken with the Parkes Telescope and the Australia Telescope Compact Array between 2002 September and 2003 August. Post-AGB stars are the precursors to planetary nebulae, the diverse morphological range of which is unexplained. The maser observations were taken to investigate the onset and incidence of wind asymmetries during the post-AGB phase. We re-detected all 86 sources at 1612 MHz while 27 sources were detected at 1665 and 45 at 1667 MHz. One source was re-detected at 1720 MHz. We present a classification scheme for the maser profiles and show that 25% of sources in our sample are likely to have asymmetric or bipolar outflows. From a comparison of the maser and far-infrared properties we find that there is a likely trend in the shape of the maser profiles with some sources evolving from double-peaked to irregular to fully bipolar profiles. A subset of higher-mass sources stand out as having almost no mainline emission and mostly double-peaked profiles. At least 25% of sources in the sample are variable at one or more of the frequencies observed. We also confirm a previously-noted 1667 MHz overshoot phenomenon.

  8. 8) Stratospheric equatorial variability a) Observations

    E-Print Network [OSTI]

    Lott, Francois

    speed. Phase lines inclined eastward when altitude increases indicating upward propation Signal field) Westward phase propagation but eastward group propagation Phase lines inclined westward Signal;5 Satellites wind observations (UARS, Swinbak et Ortland 1997) The Quasi-Biennial Oscillation (low stratosphere

  9. Uncertain Probabilistic Roadmaps with Observations Richard Dearden

    E-Print Network [OSTI]

    Yao, Xin

    Uncertain Probabilistic Roadmaps with Observations Richard Dearden School of Computer Science Science University of Birmingham Birmingham, B15 2TT, UK mlk@cs.bham.ac.uk Abstract Probabilistic roadmaps. Introduction Probabilistic Roadmaps (PRM) are a popular technique for path planning in high dimensional spaces

  10. Observation of D(0) ? K+pi-

    E-Print Network [OSTI]

    Ammar, Raymond G.; Ball, S.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Copty, N.; Davis, Robin E. P.; Hancock, N.; Kelly, M.; Kwak, Nowhan; Lam, H.

    1994-03-01

    Using the CLEO II data sample, with an integrated luminosity of 1.8 fb-1 at and near the UPSILON(4S) resonance, we have observed a signal for D0 --> K+pi-, which could be due to either D0D0BAR mixing or doubly Cabibbo suppressed decay, or a...

  11. Timed Automata with Observers under Energy Constraints

    E-Print Network [OSTI]

    Doyen, Laurent

    of schedules given an initial energy level of one. For one-clock priced timed automata both the lowerTimed Automata with Observers under Energy Constraints Patricia Bouyer Lab. Spécification et@lsv.ens-cachan.fr ABSTRACT In this paper we study one-clock priced timed automata in which prices can grow linearly ( p = k

  12. On the consistent use of Constructed Observables

    E-Print Network [OSTI]

    Michael Trott

    2015-01-17

    We define "constructed observables" as relating experimental measurements to terms in a Lagrangian while simultaneously making assumptions about possible deviations from the Standard Model (SM), in other Lagrangian terms. Ensuring that the SM effective field theory (EFT) is constrained correctly when using constructed observables requires that their defining conditions are imposed on the EFT in a manner that is consistent with the equations of motion. Failing to do so can result in a "functionally redundant" operator basis and the wrong expectation as to how experimental quantities are related in the EFT. We illustrate the issues involved considering the $\\rm S$ parameter and the off shell triple gauge coupling (TGC) verticies. We show that the relationships between $h \\rightarrow V \\bar{f} \\, f$ decay and the off shell TGC verticies are subject to these subtleties, and how the connections between these observables vanish in the limit of strong bounds due to LEP. The challenge of using constructed observables to consistently constrain the Standard Model EFT is only expected to grow with future LHC data, as more complex processes are studied.

  13. Observability of Neuronal Network Motifs (Invited Paper)

    E-Print Network [OSTI]

    Brennan, Sean

    Observability of Neuronal Network Motifs (Invited Paper) Andrew J. Whalen*t, Sean N. Brennan Engineering, + Engineering Science and Mechanics, Neurosurgery, and Physics, Penn State University, University) neuronal networks as a function of 1) the connection topology and sym metry, 2) the measured nodes, and 3

  14. Observational constraints on Tachyon and DBI inflation

    SciTech Connect (OSTI)

    Li, Sheng; Liddle, Andrew R., E-mail: sl277@sussex.ac.uk, E-mail: arl@roe.ac.uk [Astronomy Centre, University of Sussex, Brighton, BN1 9QH (United Kingdom)

    2014-03-01

    We present a systematic method for evaluation of perturbation observables in non-canonical single-field inflation models within the slow-roll approximation, which allied with field redefinitions enables predictions to be established for a wide range of models. We use this to investigate various non-canonical inflation models, including Tachyon inflation and DBI inflation. The Lambert W function will be used extensively in our method for the evaluation of observables. In the Tachyon case, in the slow-roll approximation the model can be approximated by a canonical field with a redefined potential, which yields predictions in better agreement with observations than the canonical equivalents. For DBI inflation models we consider contributions from both the scalar potential and the warp geometry. In the case of a quartic potential, we find a formula for the observables under both non-relativistic (sound speed c{sub s}{sup 2} ? 1) and relativistic behaviour (c{sub s}{sup 2} || 1) of the scalar DBI inflaton. For a quadratic potential we find two branches in the non-relativistic c{sub s}{sup 2} ? 1 case, determined by the competition of model parameters, while for the relativistic case c{sub s}{sup 2} ? 0, we find consistency with results already in the literature. We present a comparison to the latest Planck satellite observations. Most of the non-canonical models we investigate, including the Tachyon, are better fits to data than canonical models with the same potential, but we find that DBI models in the slow-roll regime have difficulty in matching the data.

  15. Sgr A* Observations with H.E.S.S. II

    E-Print Network [OSTI]

    Parsons, R D; King, J; Lefranc, V; Moulin, E; Poon, H; Veh, J

    2015-01-01

    The Galactic Centre has been studied with the High Energy Stereoscopic System (H.E.S.S.) for over 10 years, revealing a bright, complex gamma-ray morphology. Besides a strong point-like very-high-energy gamma-ray source coincident with the supermassive black hole Sgr A*, pre- vious analyses also revealed a diffuse ridge of gamma-ray emission, indicative of a powerful cosmic-ray accelerator in this region. The addition of a fifth telescope with 600 m 2 mirror area to the centre of the H.E.S.S. array has increased the energy range accessible, allowing observations to take place down to 100 GeV and potentially below. This wider energy range allows an important overlap in observations with satellite instruments such as the Fermi-LAT gamma-ray telescope. We will present the results of new H.E.S.S observations of the Galactic Centre region and show a detailed analysis of the central source, including comparisons to results at other wavelengths.

  16. Observation of incomplete fusion reactions at l < l {sub crit}

    SciTech Connect (OSTI)

    Yadav, Abhishek Sharma, Vijay R. Singh, Devendra P. Unnati,; Singh, B. P.; Prasad, R.; Singh, Pushpendra P.; Bala, Indu; Kumar, R.; Muralithar, S.; Singh, R. P.; Sharma, M. K.

    2014-08-14

    In order to understand the presence of incomplete fusion at low energies i.e. 4-7MeV/nucleon and also to study its dependence on various entrance-channel parameters, the two type of measurements (i) excitation function for {sup 12}C+{sup 159}Tb, and (ii) forward recoil ranges for {sup 12}C+{sup 159}Tb systems have been performed. The experimentally measured excitation functions have been analyzed within the framework of compound nucleus decay using statistical model code PACE4. Analysis of data suggests the production of xn/px)n-channels via complete fusion, as these are found to be well reproduced by PACE4 predictions, while, a significant enhancement in the excitation functions of ?-emitting channels has been observed over the theoretical ones, which has been attributed due to the incomplete fusion processes. Further, the incomplete fusion events observed in case of forward recoil range measurements have been explained on the basis of the breakup fusion model, where these events may be attributed to the fusion of {sup 8}Be and/or {sup 4}He from {sup 12}C projectile to the target nucleus. In the present work, the SUMRULE model calculations are found to highly underestimate the observed incomplete fusion cross-sections which indicate that the l-values lower than l {sub crit} (limit of complete fusion) significantly contribute to the incomplete fusion reactions.

  17. RADIO OBSERVATIONS OF HD 80606 NEAR PLANETARY PERIASTRON

    SciTech Connect (OSTI)

    Lazio, T. Joseph W.; Farrell, W. M.; Shankland, P. D.; Blank, D. L.

    2010-12-15

    This paper reports Very Large Array observations at 325 and 1425 MHz ({lambda}90 cm and {lambda}20 cm) during and near the periastron passage of HD 80606b on HJD 2454424.86 (2007 November 20). We obtain flux density limits (3{sigma}) of 1.7 mJy and 48 {mu}Jy at 325 and 1425 MHz, respectively, equivalent to planetary luminosity limits of 2.3 x 10{sup 24} erg s{sup -1} and 2.7 x 10{sup 23} erg s{sup -1}. Unfortunately, these are several orders of magnitude above the nominal Jovian value (at 40 MHz) of 2 x 10{sup 18} erg s{sup -1}. The motivation for these observations was that the planetary magnetospheric emission is driven by a stellar wind-planetary magnetosphere interaction so that the planetary luminosity would be elevated near periastron. We estimate that, near periastron, HD 80606b might be as much as 3000 times more luminous than Jupiter. Recent transit observations of HD 80606b provide reasonably stringent constraints on the planetary mass and radius, and, because of the planet's highly eccentric orbit, its rotation period is likely to be 'pseudo-synchronized' to its orbital period, allowing a robust estimate of the former. Consequently, we are able to make relatively robust estimates of the emission frequency of the planetary magnetospheric emission and find it to be around 60-90 MHz. While this is too low for our reported observations, we compare HD 80606b to other high-eccentricity systems and assess the detection possibilities for both near-term and more distant future systems. Of the known high-eccentricity planets, only HD 80606b is likely to be detectable, as the others (HD 20782B and HD 4113) are both lower mass and longer rotational periods, which imply weaker magnetic field strengths. We find that both the forthcoming 'EVLA low band' system, which will operate as low as 65 MHz, and the Low Frequency Array may be able to improve upon our planetary luminosity limits for HD 80606b, and do so at a more optimum frequency. If the low-frequency component of the Square Kilometre Array (SKA-lo) and a future lunar radio array are able to approach their thermal noise limits, they should be able to detect an HD 80606b-like planet, unless the amount by which the planet's luminosity increases is substantially less than the factor of 3000 that we estimate; for the SKA-lo, which is to be located in the southern hemisphere, future planetary surveys will have to find southern hemisphere equivalents of HD 80606b.

  18. Some characteristics of dynamic pressure measurements in an internal combustion engine, and a method of compensation for the errors in the measuring system 

    E-Print Network [OSTI]

    Norton, David Jerry

    1963-01-01

    ower load =0 40 b 0 p 9 -4. I 4. 2 4 ~ compreSSlo n r a?o FI 6 I 2, EFFI'C I ENC Y II S. COMPRESSION RATIO 17 Fig. 13. Schematic drawing of the mechanical system. The equation of motion for this familiar system is, ~ I NX + C(X-Y) + K(X-Y) = F...

  19. Observables in Strongly Coupled Anisotropic Theories

    E-Print Network [OSTI]

    Dimitrios Giataganas

    2013-12-30

    We review certain anisotropic gauge/gravity dualities, focusing more on a theory with space dependent axion term. Then we discuss and also present some new results for several observables: the static potential and force, the imaginary part of the static potential, the quark dipole in the plasma wind, the drag force and diffusion time, the jet quenching of heavy and light quarks, the energy loss of rotating quarks, the photon production and finally the violation of the holographic viscosity over entropy bound. The corresponding weakly coupled results are also discussed. Finally we investigate the bounds of the parameters of the current strongly coupled anisotropic theories attempting to match them with the observed quark-gluon plasma and report the problems appear.

  20. Fermi Observations of Gamma-ray Bursts

    SciTech Connect (OSTI)

    Ohno, Masanori [Institute of Space and Astronautical Science, JAXA, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210 (Japan)

    2010-10-15

    The gamma-ray emission mechanism of Gamma-ray bursts (GRBs) are still unknown. Fermi Gamma-ray Space Telescope successfully detected high-energy (> 100 MeV) emission from 17 GRBs since its launch. Fermi revealed the distinct temporal behaviors and extra spectral component from high-energy emission. These new observational results are driving many theoretical implications, such as leptonic, hadronic and afterglow origin. The highest energy photon detected by Fermi gives a constraint on the bulk Lorentz factor of the ultra-relativistic jets of GRBs. The impact of the Fermi GRB observations extends not only to the GRB-related issues but also to the outside GRB physics, such as quantum gravity and model of the extra galactic background light.