National Library of Energy BETA

Sample records for hat network satellite

  1. T-649: Red Hat Network Satellite Server Request Validation Flaw Permits Cross-Site Request Forgery Attacks

    Broader source: Energy.gov [DOE]

    The Red Hat Network (RHN) Satellite and Spacewalk services do not properly validate user-supplied. A remote user can create specially crafted HTML that, when loaded by a target authenticated user, will take actions on the target site acting as the target user.

  2. V-163: Red Hat Network Satellite Server Inter-Satellite Sync...

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

    U-046: Apache modproxymodrewrite Bug Lets Remote Users Access Internal Servers U-049: IBM Tivoli Netcool Reporter CGI Bug Lets Remote Users Inject Commands on the Target System...

  3. V-163: Red Hat Network Satellite Server Inter-Satellite Sync Remote

    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 GasAdjustmentsShirleyEnergyThe U.S.Lacledeutilities. The Economics of ElectricScriptingDepartment of

  4. Satellite Transport Protocol (STP): An SSCOPbased Transport Protocol for Datagram Satellite Networks

    E-Print Network [OSTI]

    California at Berkeley, University of

    1 Satellite Transport Protocol (STP): An SSCOP­based Transport Protocol for Datagram Satellite Networks Thomas R. Henderson * and Randy H. Katz University of California at Berkeley {tomh­based protocol, the Service Specific Connection Oriented Protocol (SSCOP), for use as a transport protocol

  5. IP ROUTING ISSUES IN SATELLITE CONSTELLATION NETWORKS A. CLERGET,2

    E-Print Network [OSTI]

    Wood, Lloyd

    constellation networks; Internet Protocol (IP); routing; tunnelling; Multi-Protocol Label Switching (MPLS); Border Gateway Protocol (BGP); Quality of Service (QoS); multicast. 1 INTRODUCTION Satellite; in conjunction with its terrestrial gateway stations it forms an autonomous system (AS). Over the same period

  6. Hardware demonstration of high-speed networks for satellite applications.

    SciTech Connect (OSTI)

    Donaldson, Jonathon W.; Lee, David S.

    2008-09-01

    This report documents the implementation results of a hardware demonstration utilizing the Serial RapidIO{trademark} and SpaceWire protocols that was funded by Sandia National Laboratories (SNL's) Laboratory Directed Research and Development (LDRD) office. This demonstration was one of the activities in the Modeling and Design of High-Speed Networks for Satellite Applications LDRD. This effort has demonstrated the transport of application layer packets across both RapidIO and SpaceWire networks to a common downlink destination using small topologies comprised of commercial-off-the-shelf and custom devices. The RapidFET and NEX-SRIO debug and verification tools were instrumental in the successful implementation of the RapidIO hardware demonstration. The SpaceWire hardware demonstration successfully demonstrated the transfer and routing of application data packets between multiple nodes and also was able reprogram remote nodes using configuration bitfiles transmitted over the network, a key feature proposed in node-based architectures (NBAs). Although a much larger network (at least 18 to 27 nodes) would be required to fully verify the design for use in a real-world application, this demonstration has shown that both RapidIO and SpaceWire are capable of routing application packets across a network to a common downlink node, illustrating their potential use in real-world NBAs.

  7. Dynamic power allocation and routing for satellite and wireless networks with time varying channels

    E-Print Network [OSTI]

    Neely, Michael J. (Michael James), 1975-

    2004-01-01

    Satellite and wireless networks operate over time varying channels that depend on attenuation conditions, power allocation decisions, and inter-channel interference. In order to reliably integrate these systems into a high ...

  8. Wireless Sensor Network to Satellite Master thesis in Information and Communication Technology

    E-Print Network [OSTI]

    Brest, Université de

    . Wireless Sensor Network (WSN) currently is a solution for many practical problems in emer- gency and environment controlling. Obviously, WSN is deployed in many regions and works effec- tively to monitor weather opportunities in cooperation between satellite and WSN to control remotely the distant WSN, i.e ocean, desert

  9. WARM SPITZER PHOTOMETRY OF THREE HOT JUPITERS: HAT-P-3b, HAT-P-4b AND HAT-P-12b

    E-Print Network [OSTI]

    Todorov, Kamen O.

    We present Warm Spitzer/IRAC secondary eclipse time series photometry of three short-period transiting exoplanets, HAT-P-3b, HAT-P-4b and HAT-P-12b, in both the available 3.6 and 4.5 ?m bands. HAT-P-3b and HAT-P-4b are ...

  10. The Center for Satellite and Hybrid Communication Networks is a NASA Commercial Space Center and part of the Institute for Systems Research

    E-Print Network [OSTI]

    Wood, Lloyd

    -satellite constellation networks were, briefly, a vogueish research area, as the commercial satellite industry embraced a more realistic look at the current satellite industry and areas of interest including: · DVB: IP over of Maryland, College Park Refreshments Provided Faculty Host: Dr. M. Hadjitheodosiou #12;

  11. U-200: Red Hat Directory Server Information Disclosure Security...

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

    A security issue and a vulnerability have been reported in Red Hat Directory Server, which can be exploited by malicious users to disclose sensitive information. PLATFORM: Red Hat...

  12. Red Hat Enterprise Virtualization - KVM-based infrastructure services at BNL

    SciTech Connect (OSTI)

    Cortijo, D.

    2011-06-14

    Over the past 18 months, BNL has moved a large percentage of its Linux-based servers and services into a Red Hat Enterprise Virtualization (RHEV) environment. This presentation will address our approach to virtualization, critical decision points, and a discussion of our implementation. Specific topics will include an overview of hardware and software requirements, networking, and storage; discussion of the decision of Red Hat solution over competing products (VMWare, Xen, etc); details on some of the features of RHEV - both current and on their roadmap; Review of performance and reliability gains since deployment completion; path forward for RHEV at BNL and caveats and potential problems.

  13. Network Economics Anna Nagurney

    E-Print Network [OSTI]

    Nagurney, Anna

    Performance/Efficiency Measure with Applications to a Variety of Network Systems · Transportation Network Network Satellite and Undersea Cable Networks Duke Energy Gas Pipeline Network Transportation with transportation as the unifying application. #12;Subway Network Railroad Network Iridium Satellite Constellation

  14. Long-term surveillance plan for the Mexican Hat disposal site Mexican Hat, Utah

    SciTech Connect (OSTI)

    NONE

    1997-06-01

    This long-term surveillance plan (LTSP) describes the U.S. Department of Energy`s (DOE) long-term care program for the Uranium Mill Tailings Remedial Action (UMTRA) Project Mexican Hat, Utah, disposal site. This LSTP describes the long-term surveillance program the DOE will implement to ensure the Mexican Hat disposal site performs as designed and is cared for in a manner that protects the public health and safety and the environment. Before each disposal site is licensed for custody and long-term care, the Nuclear Regulatory Commission (NRC) requires the DOE to submit such a site-specific LTSP.

  15. Mexican Hat, Utah, Disposal Site Fact Sheet

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and700,Grand JunctionMSGOUIDMay and JuneMexican Hat,

  16. Engineering assessment of inactive uranium mill tailings: Mexican Hat site, Mexican Hat, Utah. Summary

    SciTech Connect (OSTI)

    none,

    1981-09-01

    Ford, Bacon and Davis Utah Inc. has reevaluated the Mexican Hat site in order to revise the March 1977 engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at Mexican Hat, Utah. This engineering assessment has included the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and radiation exposures of individuals and nearby populations, the investigations of site hydrology and meteorology, and the investigations of site hydrology and meteorology, and the evaluation and costing of alternative corrective actions. Radon gas released from the 2.2 million tons of tailings at the Mexican Hat site constitutes the most significant environmental impact, although windblown tailings and external gamma radiation also are factors. The four alternative actions presented in this engineering assessment range from millsite decontamination with the addition of 3 m of stabilization cover material to removal of the tailings to remote disposal sites and decontamination of the tailings site. Cost estimates for the four options range from about $15,200,000 for stabilization in place, to about $45,500,000 for disposal at a distance of about 16 mi. Three principal alternatives for the reprocessing of the Mexican Hat tailings were examined: (a) heap leaching; treatment at an existing mill; and reprocessing at a new conventional mill constructed for tailings reprocessing. The cost of the uranium recovered would be about $115/lb of U/sub 3/O/sub 8/ whether by heap leach or conventional plant processes. The spot market price for uranium was $25/lb early in 1981. Reprocessing the Mexican Hat tailings for uranium recovery is not economically attractive under present conditions.

  17. Long-term surveillance plan for the Mexican Hat disposal site Mexican Hat, Utah

    SciTech Connect (OSTI)

    NONE

    1997-05-01

    This long-term surveillance plan (LTSP) describes the U.S. Department of Energy`s (DOE) long-term care program for the Uranium Mill Tailings Remedial Action (UMTRA) Project Mexican Hat, Utah, disposal site. The U.S. Nuclear Regulatory Commission (NRC) has developed regulations for the issuance of a general license for the custody and long-term care of UMTRA Project disposal sites in 10 CFR Part 40. The purpose of this general license is to ensure that the UMTRA Project disposal sites will be cared for in a manner that protects the public health and safety and the environment. Before each disposal site is licensed, the NRC requires the DOE to submit a site-specific LTSP. The DOE prepared this LTSP to meet this requirement for the Mexican Hat disposal site. The general license becomes effective when the NRC concurs with the DOE`s determination of completion of remedial action for the disposal site and the NRC formally accepts this LTSP. This LTSP describes the long-term surveillance program the DOE will implement to ensure that the Mexican Hat disposal site performs as designed. The program is based on two distinct types of activities: (1) site inspections to identify potential threats to disposal cell integrity, and (2) monitoring of selected seeps to observe changes in flow rates and water quality. The LTSP is based on the UMTRA Project long-term surveillance program guidance and meets the requirements of 10 CFR {section}40.27(b) and 40 CFR {section}192.03. 18 refs., 6 figs., 1 tab.

  18. RELATIVE PHOTOMETRY OF HAT-P-1b OCCULTATIONS

    E-Print Network [OSTI]

    Holman, Matthew J.

    We present Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph observations of two occultations of the transiting exoplanet HAT-P-1b. By measuring the planet to star flux ratio near opposition, we constrain ...

  19. Long-term surveillance plan for the Mexican Hat disposal site, Mexican Hat, Utah

    SciTech Connect (OSTI)

    NONE

    1996-01-01

    This plan describes the long-term surveillance activities for the Uranium Mill Tailings Remedial Action (UMTRA) Project disposal site at Mexican Hat, Utah. The US Department of Energy (DOE) will carry out these activities to ensure that the disposal site continues to function as designed. This long-term surveillance plan (LTSP) was prepared as a requirement for acceptance under the US Nuclear Regulatory Commission (NRC) general license for custody and long-term care of residual radioactive material (RRM). This LTSPC documents the land ownership interests and details how the long-term care of the disposal site will be accomplished.

  20. Long-term surveillance plan for the Mexican Hat Disposal Site, Mexican Hat, Utah

    SciTech Connect (OSTI)

    NONE

    1996-02-01

    This plan describes the long-term surveillance activities for the Uranium Mill Tailings Remedial Action (UMTRA) Project disposal site at Mexican Hat, Utah. The U.S. Department of Energy (DOE) will carry out these activities to ensure that the disposal site continues to function as designed. This long-term surveillance plan (LTSP) was prepared as a requirement for acceptance under the U.S. Nuclear Regulatory Commission (NRC) general license for custody and long-term care of residual radioactive material (RRM). This LTSP (based on the DOE`s Guidance for Implementing the UMTRA Project Long-term Surveillance Program), documents the land ownership interests and details how the long-term care of the disposal site will be accomplished.

  1. Space-based solar power generation using a distributed network of satellites and methods for efficient space power transmission

    E-Print Network [OSTI]

    McLinko, Ryan M.

    Space-based solar power (SSP) generation is being touted as a solution to our ever-increasing energy consumption and dependence on fossil fuels. Satellites in Earth's orbit can capture solar energy through photovoltaic ...

  2. T-712: Red Hat Enterprise MRG Grid 2.0 security, bug fix and...

    Office of Environmental Management (EM)

    12: Red Hat Enterprise MRG Grid 2.0 security, bug fix and enhancement update T-712: Red Hat Enterprise MRG Grid 2.0 security, bug fix and enhancement update September 8, 2011 -...

  3. T-563: Red Hat Directory Server Bugs Let Local Users Gain Elevated...

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

    T-671: Red Hat system-config-firewall Lets Local Users Gain Root Privileges V-041: Red Hat CloudForms Multiple Vulnerabilities U-198: IBM Lotus Expeditor Multiple Vulnerabilities...

  4. HAT-P-44b, HAT-P-45b, and HAT-P-46b: Three Transiting Hot Jupiters in Possible Multi-Planet Systems

    E-Print Network [OSTI]

    Hartman, J D; Torres, G; Kovács, G; Johnson, J A; Howard, A W; Marcy, G W; Latham, D W; Bieryla, A; Buchhave, L A; Bhatti, W; Béky, B; Csubry, Z; Penev, K; de Val-Borro, M; Noyes, R W; Fischer, D A; Esquerdo, G A; Everett, M; Szklenár, T; Zhou, G; Bayliss, D; Shporer, A; Fulton, B J; Sanchis-Ojeda, R; Falco, E; Lázár, J; Papp, I; Sári, P

    2013-01-01

    We report the discovery by the HATNet survey of three new transiting extrasolar planets orbiting moderately bright (V=13.2, 12.8 and 11.9) stars. The planets have orbital periods of 4.3012, 3.1290, and 4.4631 days, masses of 0.39, 0.89, and 0.49 Mjup, and radii of 1.28, 1.43, and 1.28 Rjup. The stellar hosts have masses of 0.94, 1.26, and 1.28 Msun. Each system shows significant systematic variations in its residual radial velocities indicating the possible presence of additional components. Based on its Bayesian evidence, the preferred model for HAT-P-44 consists of two planets, including the transiting component, with the outer planet having a period of 220 d and a minimum mass of 1.6 Mjup. Due to aliasing we cannot rule out an alternative solution for the outer planet having a period of 438 d and a minimum mass of 3.7 Mjup. For HAT-P-45 at present there is not enough data to justify the additional free parameters included in a multi-planet model, in this case a single-planet solution is preferred, but the ...

  5. HAT-P-44b, HAT-P-45b, AND HAT-P-46b: Three transiting hot Jupiters in possible multi-planet systems

    SciTech Connect (OSTI)

    Hartman, J. D.; Bakos, G. Á.; Bhatti, W.; Csubry, Z.; Penev, K.; De Val-Borro, M.; Torres, G.; Latham, D. W.; Bieryla, A.; Béky, B.; Noyes, R. W.; Esquerdo, G. A.; Kovács, G.; Johnson, J. A.; Howard, A. W.; Marcy, G. W.; Buchhave, L. A.; Fischer, D. A.; Everett, M.; Szklenár, T.; and others

    2014-06-01

    We report the discovery by the HATNet survey of three new transiting extrasolar planets orbiting moderately bright (V = 13.2, 12.8, and 11.9) stars. The planets have orbital periods of 4.3012, 3.1290, and 4.4631 days, masses of 0.35, 0.89, and 0.49 M {sub J}, and radii of 1.24, 1.43, and 1.28 R {sub J}. The stellar hosts have masses of 0.94, 1.26, and 1.28 M {sub ?}. Each system shows significant systematic variations in its residual radial velocities, indicating the possible presence of additional components. Based on its Bayesian evidence, the preferred model for HAT-P-44 consists of two planets, including the transiting component, with the outer planet having a period of 872 days, eccentricity of 0.494 ± 0.081, and a minimum mass of 4.0 M {sub J}. Due to aliasing we cannot rule out alternative solutions for the outer planet having a period of 220 days or 438 days. For HAT-P-45, at present there is not enough data to justify the additional free parameters included in a multi-planet model; in this case a single-planet solution is preferred, but the required jitter of 22.5 ± 6.3 m s{sup –1} is relatively high for a star of this type. For HAT-P-46 the preferred solution includes a second planet having a period of 78 days and a minimum mass of 2.0 M {sub J}, however the preference for this model over a single-planet model is not very strong. While substantial uncertainties remain as to the presence and/or properties of the outer planetary companions in these systems, the inner transiting planets are well characterized with measured properties that are fairly robust against changes in the assumed models for the outer planets. Continued radial velocity monitoring is necessary to fully characterize these three planetary systems, the properties of which may have important implications for understanding the formation of hot Jupiters.

  6. DOE - Office of Legacy Management -- MexHat

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and Myers CoMadison - IL 26 FUSRAPUtah Mexican Hat,

  7. Red Hat Enterprise Linux 3 The Next Generation Of Enterprise Class Linux

    E-Print Network [OSTI]

    Source Community Code Base Fedora Project - Various Architectures Availablevia http development of new releases e 12-18 month release cycle e 5-year support life cycle e Targeted 6-month Alpha Key Changes to Red Hat Linux ¡ Red Hat Linux products are going end-of-life (EOL) ¡ EOL = no bug fix

  8. UMTRA Project Site Observational Work Plan, Mexican Hat, Utah

    SciTech Connect (OSTI)

    Not Available

    1994-09-01

    Surface cleanup activities at the Mexican Hat UMTRA processing site are nearing completion. Ground Water contamination at the Mexican Hat site is a result of uranium milling operations. The extent of residual process water has been identified, and it is limited to the uppermost aquifer in the vicinity of the site. Deeper aquifers are not affected because of an upward hydraulic gradient and the presence of a confining unit (the deeper aquifers are protected by hydrogeologic isolation). The uppermost unit is returning to its pre-milling, mainly unsaturated state. The unit that contains the contaminated water is not a ground water resource because it qualifies as Class III (limited use) based on limited yield. Ground water in the uppermost unit is currently not used and is not anticipated to be used as a ground water resource. The nearby San Juan River and a converted oil exploration well provide all of the water needs for the area. There are no current threats to human health or livestock; and, because the zone of contamination does not represent a ground water resource, none are anticipated in the future. There are, however, seeps where contaminated water is exposed at land surface. The seeps create potential exposure pathways for plants and wildlife. It is not known at this time if there is a risk to the environment. Additional investigations are needed and are described in this document to confirm the presence or absence of potential environmental risks. Additional hydrogeologic investigations are not required. The proposed ground water compliance strategy for the site is no remediation, because the ground water in the uppermost aquifer (which is also the zone of contamination) qualifies for supplemental standards based on Class III, limited yield, and because there are no threats to human health. Domestic and agricultural water is pumped from a deeper aquifer that is isolated from the contaminated zone.

  9. Interactions between TCP and link layer protocols on mobile satellite links

    E-Print Network [OSTI]

    Faulkner, Edward A., 1980-

    2004-01-01

    High speed satellite-based data networks are highly desirable for a variety of mobile applications. In order to inter-operate with existing networks, satellite-based systems must support TCP/IP traffic. However, TCP performs ...

  10. Remedial Action Plan for the codisposal and stabilization of the Monument Valley and Mexican Hat uranium mill tailings at Mexican Hat, Utah: Appendices C--E. Final report

    SciTech Connect (OSTI)

    NONE

    1993-02-01

    This document provides appendices C, D, and E this Remedial Action Plan (RAP) which is a revision of the original Mexican Hat Remedial Action Plan and RAP Modification submitted in July 1988 and January 1989, respectively, along with updated design documents. Appendix C provide the Radiological Support Plan, Appendix D provides the Site Characterization, and Appendix E provides the Water Resources Protection Strategy.

  11. U-230: Sudo on Red Hat Enterprise Linux %postun Symlink Flaw Lets Local Users Gain Elevated Privileges

    Broader source: Energy.gov [DOE]

    An updated sudo package that fixes one security issue and several bugs is now available for Red Hat Enterprise Linux 5.

  12. Measurement of nonlinear index by a relay-imaged top-hat Z-scan technique

    SciTech Connect (OSTI)

    Shimada, T.; Kurnit, N.A.; Sheik-Bahae, M.

    1996-04-01

    Measurements of the nonlinear index of a number of optical materials of interest for the National Ignition Facility have been performed at 1,064 nm and 355 nm by a modified version of the ``top-hat`` technique and the results compared with the more standard gaussian-beam Z-scan technique. The top-hat technique has the advantages of higher sensitivity and smaller uncertainties introduced by beam-quality considerations. The authors have made what they feel to be an additional improvement by placing the defining aperture for the top hat at the front focal plane of the lens that focuses the beam into the sample and then reimaging the input aperture with a second lens onto a ccd camera. Reimaging eliminates diffraction fringes and provides a stationary image even for a wedged sample; recording the entire image permits minimization of spurious effects such as varying interference fringes.

  13. Data-Centric Systems and Networking Contact: eiko.yoneki@cl.cam.ac.uk

    E-Print Network [OSTI]

    Haddadi, Hamed

    ) Digital Epidemiology Raspberry Pi based delay tolerant networks with satellite connectivity in developing

  14. Remedial Action Plan for the codisposal and stabilization of the Monument Valley and Mexican Hat uranium mill tailings at Mexican Hat, Utah

    SciTech Connect (OSTI)

    NONE

    1993-02-01

    This document is a revision of the original Mexiacan Hat Remedial Action Plan (RAP) and RAP Modification submitted in July 1988 and January 1989, respectively, along with updated design documents. This RAP has been developed to serve a two-fold purpose. It presents the activities proposed by the Department of Energy (DOE) to accomplish long-term stabilization and control of the residual radioactive materials (RRM) from Monument Valley, Arizona, and Mexican Hat, Utah, at the Mexican Hat disposal site. It also serves to document the concurrence of both the Navajo Nation and the Nuclear Regulatory Commission (NRC) in the remedial action. This agreement, upon execution by DOE and the Navajo Nation and concurrence by the NRC, becomes Appendix B of the Cooperative Agreement. This document has been structured to provide a comprehensive understanding of the remedial action proposed for the Monument Valley and Mexican Hat sites. It includes specific design and construction requirements for the remedial action. Pertinent information and data are included with reference given to the supporting documents. Section 2.0 presents the EPA standards, including a discussion of their objectives. Section 3. 0 summarizes the present site characteristics and provides a definition of site-specific problems. Section 4.0 is the site design for the proposed action. Section 5.0 presents the water resources protection strategy. Section 6.0 summarizes the plan for ensuring health and safety protection for the surrounding community and the on- site workers. Section 7.0 lists the responsibilities of the project participants. Section 8.0 describes the features of the long-term surveillance and maintenance plan.

  15. WASP-35b, WASP-48b, AND HAT-P-30b/WASP-51b: TWO NEW PLANETS AND AN INDEPENDENT DISCOVERY OF A HAT PLANET

    SciTech Connect (OSTI)

    Enoch, B.; Brown, D. J. A.; Cameron, A. Collier; Anderson, D. R.; Smalley, B.; Barros, S. C. C.; Faedi, F.; Gillon, M.; Hebrard, G.; Bouchy, F.; Lister, T. A.; Street, R. A.; Queloz, D.; Triaud, A. H. M. J.; Santerne, A.; West, R. G.; Butters, O.; Bento, J.; Fossati, L.; Haswell, C. A.

    2011-09-15

    We report the detection of WASP-35b, a planet transiting a metal-poor ([Fe/H] = -0.15) star in the Southern hemisphere, WASP-48b, an inflated planet which may have spun-up its slightly evolved host star of 1.75 R{sub sun} in the Northern hemisphere, and the independent discovery of HAT-P-30b/WASP-51b, a new planet in the Northern hemisphere. Using WASP, RISE, Faulkes Telescope South, and TRAPPIST photometry, with CORALIE, SOPHIE, and NOT spectroscopy, we determine that WASP-35b has a mass of 0.72 {+-} 0.06 M{sub J} and radius of 1.32 {+-} 0.05R{sub J} , and orbits with a period of 3.16 days, WASP-48b has a mass of 0.98 {+-} 0.09 M{sub J} , radius of 1.67 {+-} 0.10 R{sub J} , and orbits in 2.14 days, while HAT-P-30b/WASP-51b, with an orbital period of 2.81 days, is found to have a mass of 0.76 {+-} 0.05 M{sub J} and radius of 1.42 {+-} 0.03 R{sub J} , agreeing with values of 0.71 {+-} 0.03 M{sub J} and 1.34 {+-} 0.07 R{sub J} reported for HAT-P-30b.

  16. hat water you're drinking --or sprinkling onto your flowers, or

    E-Print Network [OSTI]

    hat water you're drinking -- or sprinkling onto your flowers, or using to irrigate your crops water is to send a sample to a laboratory to be analyzed. The lab will test the water and send you a report about its contents. Water analysis is con- ducted by governmental agencies and by private

  17. HATS-5b: A TRANSITING HOT SATURN FROM THE HATSouth SURVEY

    SciTech Connect (OSTI)

    Zhou, G.; Bayliss, D.; Schmidt, B.; Penev, K.; Bakos, G. Á.; Hartman, J. D.; Csubry, Z.; Jordán, A.; Brahm, R.; Rabus, M.; Suc, V.; Espinoza, N.; Mancini, L.; Mohler, M.; Ciceri, S.; Henning, T.; Buchhave, L.; Béky, B.; Noyes, R. W.; Butler, R. P.; and others

    2014-06-01

    We report the discovery of HATS-5b, a transiting hot Saturn orbiting a G-type star, by the HATSouth survey. HATS-5b has a mass of M{sub p} ? 0.24 M {sub J}, radius of R{sub p} ? 0.91 R {sub J}, and transits its host star with a period of P ? 4.7634 days. The radius of HATS-5b is consistent with both theoretical and empirical models. The host star has a V-band magnitude of 12.6, mass of 0.94 M {sub ?}, and radius of 0.87 R {sub ?}. The relatively high scale height of HATS-5b and the bright, photometrically quiet host star make this planet a favorable target for future transmission spectroscopy follow-up observations. We reexamine the correlations in radius, equilibrium temperature, and metallicity of the close-in gas giants and find hot Jupiter-mass planets to exhibit the strongest dependence between radius and equilibrium temperature. We find no significant dependence in radius and metallicity for the close-in gas giant population.

  18. ORBITAL PHASE VARIATIONS OF THE ECCENTRIC GIANT PLANET HAT-P-2b

    E-Print Network [OSTI]

    Knutson, Heather A.

    We present the first secondary eclipse and phase curve observations for the highly eccentric hot Jupiter HAT-P-2b in the 3.6, 4.5, 5.8, and 8.0 ?m bands of the Spitzer Space Telescope. The 3.6 and 4.5 ?m data sets span an ...

  19. Atmospheric circulation of eccentric hot Jupiter HAT-P-2B

    SciTech Connect (OSTI)

    Lewis, Nikole K.; Showman, Adam P.; Fortney, Jonathan J.; Knutson, Heather A.; Marley, Mark S.

    2014-11-10

    The hot Jupiter HAT-P-2b has become a prime target for Spitzer Space Telescope observations aimed at understanding the atmospheric response of exoplanets on highly eccentric orbits. Here we present a suite of three-dimensional atmospheric circulation models for HAT-P-2b that investigate the effects of assumed atmospheric composition and rotation rate on global scale winds and thermal patterns. We compare and contrast atmospheric models for HAT-P-2b, which assume one and five times solar metallicity, both with and without TiO/VO as atmospheric constituents. Additionally we compare models that assume a rotation period of half, one, and two times the nominal pseudo-synchronous rotation period. We find that changes in assumed atmospheric metallicity and rotation rate do not significantly affect model predictions of the planetary flux as a function of orbital phase. However, models in which TiO/VO are present in the atmosphere develop a transient temperature inversion between the transit and secondary eclipse events that results in significant variations in the timing and magnitude of the peak of the planetary flux compared with models in which TiO/VO are omitted from the opacity tables. We find that no one single atmospheric model can reproduce the recently observed full orbit phase curves at 3.6, 4.5 and 8.0 ?m, which is likely due to a chemical process not captured by our current atmospheric models for HAT-P-2b. Further modeling and observational efforts focused on understanding the chemistry of HAT-P-2b's atmosphere are needed and could provide key insights into the interplay between radiative, dynamical, and chemical processes in a wide range of exoplanet atmospheres.

  20. Network

    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.Theory ofDid you notHeatMaRIEdioxide capture CSNationalNational UserNaval TheNetwork

  1. 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...

  2. Evidence for Water in the Atmosphere of HAT-P-26b Using LDSS-3C

    E-Print Network [OSTI]

    Stevenson, Kevin B; Seifahrt, Andreas; Gilbert, Greg; Line, Michael R; Desert, Jean-Michel; Fortney, Jonathan J

    2015-01-01

    The characterization of a physically-diverse set of transiting exoplanets is an important and necessary step towards establishing the physical properties linked to the production of obscuring clouds or hazes. Only planets with identifiable spectroscopic features can effectively enhance our understanding of atmospheric chemistry and metallicity. Using data acquired by the newly-commissioned LDSS-3C instrument on Magellan and the Spitzer Space Telescope, we find evidence for water in the transmission spectrum of the Neptune-mass planet HAT-P-26b. Surprisingly, we detect no trace of potassium. Our measured spectrum is best explained by either a high-metallicity, cloud-free atmosphere or a solar-metallicity atmosphere with a cloud deck at ~10 mbar. The presence of strong spectral features in our data suggests that future observations at higher precision could break this degeneracy and reveal the planet's atmospheric composition. We also update HAT-P-26b's transit ephemeris, t_0 = 2455304.65218(25) BJD_TDB, and or...

  3. PV output variability modeling using satellite imagery.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Ellis, Abraham; Reno, Matthew J.

    2010-11-01

    High frequency irradiance variability measured on the ground is caused by the formation, dissipation, and passage of clouds in the sky. If we can identify and associate different cloud types/patterns from satellite imagery, we may be able to predict irradiance variability in areas lacking sensors. With satellite imagery covering the entire U.S., this allows for more accurate integration planning and power flow modeling over wide areas. Satellite imagery from southern Nevada was analyzed at 15 minute intervals over a year. Methods for image stabilization, cloud detection, and textural classification of clouds were developed and tested. High Performance Computing parallel processing algorithms were also investigated and tested. Artificial Neural Networks using imagery as inputs were trained on ground-based measurements of irradiance to model the variability and were tested to show some promise as a means for predicting irradiance variability.

  4. Wave turbulence description of interacting particles: Klein-Gordon model with a Mexican-hat potential

    E-Print Network [OSTI]

    Gallet, Basile; Dubrulle, Bérengère

    2015-01-01

    In field theory, particles are waves or excitations that propagate on the fundamental state. In experiments or cosmological models one typically wants to compute the out-of-equilibrium evolution of a given initial distribution of such waves. Wave Turbulence deals with out-of-equilibrium ensembles of weakly nonlinear waves, and is therefore well-suited to address this problem. As an example, we consider the complex Klein-Gordon equation with a Mexican-hat potential. This simple equation displays two kinds of excitations around the fundamental state: massive particles and massless Goldstone bosons. The former are waves with a nonzero frequency for vanishing wavenumber, whereas the latter obey an acoustic dispersion relation. Using wave turbulence theory, we derive wave kinetic equations that govern the coupled evolution of the spectra of massive and massless waves. We first consider the thermodynamic solutions to these equations and study the wave condensation transition, which is the classical equivalent of Bo...

  5. Die Evolution gilt auch fr den modernen Homo sapiens hat sich ber die Evolution erhoben -das zumindest glaubt er

    E-Print Network [OSTI]

    Lummaa, Virpi

    ANZEIGE Auslese Die Evolution gilt auch für den modernen Menschen Homo sapiens hat sich über die Evolution erhoben - das zumindest glaubt er gern. Doch laut einer neuen Studie schützen soziale und die Menschheit, zumindest nicht jenen Teil, der in den Genuss moderner Medizin kommt. Die Evolution

  6. Satellite Products and Services Review Board ATBD: Satellite-Derived

    E-Print Network [OSTI]

    Miami, University of

    Satellite Products and Services Review Board ATBD: Satellite-Derived Ocean Heat Content Version 1.0 July 2012 ___________________________________ #12;NOAA /RSMAS ATBD : Satellite-Derived Ocean Heat/STAR) #12;NOAA /RSMAS ATBD : Satellite-Derived Ocean Heat Content Product Page 3 of 32 TABLE OF CONTENTS

  7. Validation of the SUNY Satellite Model in a Meteosat Evironment

    SciTech Connect (OSTI)

    Perez, R.; Schlemmer, J.; Renne, D.; Cowlin, S.; George, R.; Bandyopadhyay, B.

    2009-01-01

    The paper presents a validation of the SUNY satellite-to-irradiance model against four ground-truth stations from the Indian solar radiation network located in and around the province of Rajasthan, India. The SUNY model had initially been developed and tested to process US weather satellite data from the GOES series and has been used as part of the production of the US National Solar Resource Data Base (NSRDB). Here the model is applied to processes data from the European weather satellites Meteosat 5 and 7.

  8. An analysis of the properties of VAS satellite soundings 

    E-Print Network [OSTI]

    Rhodes, Robert Charles

    1984-01-01

    participating in AVE/VAS II (6-7 March 1982). Rawinsonde sounding in AVE/VAS format . Locations of available satellite soundings (dark circles) in comoarison with rawinsonde network (open circles) for 6 March 1982 at 2100 GMT. Mesoscale rawi nsonde stations... ~ ~ ~ ~ p ~ ~ 0 L) 1 / I I I 0 'I I I ~ ~ ~ Fig. 3. Locations of available satellite soundings (dark circles) in comparison with rawinsonde network (open circles) for 6 March 1982 at 2100 GMT. Mesoscaie rawinsonde stations are not shown. of the 16...

  9. Fingers-of-God effect of infalling satellite galaxies

    E-Print Network [OSTI]

    Hikage, Chiaki

    2015-01-01

    Understanding the nonlinear property of redshift-space distortion, i.e., Fingers-of-God (FoG) effect, is important for the redshift-space distortion studies to test gravity models. FoG effect has been usually attributed to the random motion of galaxies inside the clusters. In this paper, we demonstrate the importance of the coherent infalling motion of satellite galaxies toward the cluster center. We analytically derive the satellite velocity distribution due to the infall motion together with the random motion and show that the velocity distribution becomes far from Maxwellian when the infalling motion is dominant. We use simulated subhalo catalogs to find that the contribution of infall motion is important for massive subhalos and that their velocity distribution has top-hat like shape as expected from our analytic model.We also study the FoG effect due to infall motion on the redshift-space power spectrum. Using the simulated subhalo catalogs based on the halo occupation distribution of luminous red galaxi...

  10. $?I=1/2$ Rule and $\\hat B_K$ : 2014

    E-Print Network [OSTI]

    Andrzej J. Buras

    2014-10-07

    I summarize the status of the $\\Delta I=1/2$ rule in $K\\to\\pi\\pi$ decays within an {\\it analytic} approach based on the dual representation of QCD as a theory of weakly interacting mesons for large $N$, where $N$ is the number of colours. This approximate approach, developed in the 1980s by William Bardeen, Jean-Marc G\\'erard and myself, allowed us already 28 years ago to identify the dominant dynamics behind the $\\Delta I=1/2$ rule. However, the recent inclusion of lowest-lying vector meson contributions in addition to the pseudoscalar ones to hadronic matrix elements of current-current operators and the calculation of the corresponding Wilson coefficients in a momentum scheme at the NLO improved significantly the matching between quark-gluon short distance contributions and meson long distance contributions over our results in 1986. We obtain satisfactory description of the ${\\rm Re}A_2$ amplitude and ${\\rm Re}A_0/{\\rm Re}A_2=16.0\\pm 1.5$ to be compared with its experimental value of $22.3$. While this difference could be the result of present theoretical uncertainties in our approach, it cannot be excluded that New Physics (NP) is here at work. The analysis by Fulvia De Fazio, Jennifer Girrbach-Noe and myself shows that indeed a tree-level $Z^\\prime$ or $G^\\prime$ exchanges with masses in the reach of the LHC and special couplings to quarks can significantly improve the theoretical status of the $\\Delta I=1/2$ rule. I stress that our approach allows to understand the physics behind recent numerical results obtained in lattice QCD not only for the $\\Delta I=1/2$ rule but also for the parameter $\\hat B_K$ that enters the evaluation of $\\varepsilon_K$. In contrast to the $\\Delta I=1/2$ rule the chapter on $\\hat B_K$ in QCD appears to be basically closed.

  11. Spherical Top-Hat Collapse of Viscous Modified Chaplygin Gas in Einstein's Gravity and Loop Quantum Cosmology

    E-Print Network [OSTI]

    Ujjal Debnath; Mubasher Jamil

    2015-01-03

    In this work, we focus on the collapse of a spherically symmetric perturbation, with a classical top-hat profile, to study the nonlinear evolution of only viscous modified Chaplygin gas (VMCG) perturbations in Einstein's gravity as well as in loop quantum Cosmology (LQC). In the perturbed region, we have investigated the natures of equation of state parameter, square speed of sound and another perturbed quantities. The results have been analyzed by numerical and graphical investigations.

  12. Remedial Action Plan and site design for stabilization of the inactive uranium mill tailings site at Mexican Hat, Utah: Appendix E. Final report

    SciTech Connect (OSTI)

    NONE

    1988-07-01

    This document provides Appendix E of the Remedial Action Plan (RAP) presented in 1988 for the stabilization of the inactive uranium mill tailings at the Mexican Hat, Utah site. The RAP was developed to serve a two- fold purpose. It presents the activities proposed by the Department of Energy (DOE) to accomplish long-term stabilization and control of the residual radioactive materials (RRM) from Monument Valley, Arizona, and Mexican Hat, Utah, at the Mexican Hat disposal site. It also serves to document the concurrence of both the Navajo Nation and the Nuclear Regulatory Commission (NRC) in the remedial action. This agreement, upon execution by the DOE and the Navajo Nation and concurrence by the NRC, becomes Appendix B of the Cooperative Agreement. The RAP has been structured to provide a comprehensive understanding of the remedial action proposed for the Monument Valley and Mexican Hat sites. It includes specific design and construction requirements for the remedial action.

  13. 2013 ISES Solar World Congress Review of satellite-based surface solar irradiation databases for

    E-Print Network [OSTI]

    Recanati, Catherine

    2013 ISES Solar World Congress Review of satellite-based surface solar irradiation databases explores the possibilities provided by satellite-based surface solar irradiation databases of solar dataset or time-series is addressed with the example of the French national meteorological network

  14. A History of the Improvement of Internet Protocols Over Satellites Using ACTS \\Lambda

    E-Print Network [OSTI]

    Kruse, Hans

    A History of the Improvement of Internet Protocols Over Satellites Using ACTS \\Lambda Mark Allman of ACTS experiments on the efficacy of using standard Internet pro­ tocols over long­delay satellite­delay networks with non­zero bit­error rates on the performance of the suite of Internet protocols. In par

  15. PV Output Variability Modeling Using Satellite Imagery and Neural Matthew J. Reno1,2

    E-Print Network [OSTI]

    PV Output Variability Modeling Using Satellite Imagery and Neural Networks Matthew J. Reno1, Albuquerque, NM, USA Abstract -- Variability and ramp rates of PV systems are increasingly important to understand and model for grid stability as PV penetration levels rise. Using satellite imagery to identify

  16. Aerosol loading in the Southeastern United States: reconciling surface and satellite observations

    E-Print Network [OSTI]

    Ford, B.

    We investigate the seasonality in aerosols over the Southeastern United States using observations from several satellite instruments (MODIS, MISR, CALIOP) and surface network sites (IMPROVE, SEARCH, AERONET). We find that ...

  17. U-159: Red Hat Enterprise MRG Messaging Qpid Bug Lets Certain...

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

    IMPACT ASSESSMENT: High Discussion: Qpid may accept arbitrary passwords and SASL mechanims. A remote user on the local private interconnect network with knowledge of a valid...

  18. A Lagrangian Heuristic for Satellite Range Scheduling with ...

    E-Print Network [OSTI]

    2006-05-24

    A distributed constellation is flexible and robust: it can provide ... Force Satellite Control Network [2] and also by the engineers of Telespazio S.p.A. 1 in a preliminary study .... Transmission and reception are regarded as being simultaneous. In fact, trans- ...... http://europa.eu.int/comm/dgs/energy transport/

  19. ORIGINAL PAPER Comparing land surface phenology derived from satellite

    E-Print Network [OSTI]

    Small, Eric

    ORIGINAL PAPER Comparing land surface phenology derived from satellite and GPS network microwave, a normalized mi- crowave reflectance index (NMRI) derived from GPS base station measurements is sensitive, and their derived SOS metrics for a subset of 24 homogenous land cover sites to investigate VOD and NMRI

  20. Wave turbulence description of interacting particles: Klein-Gordon model with a Mexican-hat potential

    E-Print Network [OSTI]

    Basile Gallet; Sergey Nazarenko; Bérengère Dubrulle

    2015-04-21

    In field theory, particles are waves or excitations that propagate on the fundamental state. In experiments or cosmological models one typically wants to compute the out-of-equilibrium evolution of a given initial distribution of such waves. Wave Turbulence deals with out-of-equilibrium ensembles of weakly nonlinear waves, and is therefore well-suited to address this problem. As an example, we consider the complex Klein-Gordon equation with a Mexican-hat potential. This simple equation displays two kinds of excitations around the fundamental state: massive particles and massless Goldstone bosons. The former are waves with a nonzero frequency for vanishing wavenumber, whereas the latter obey an acoustic dispersion relation. Using wave turbulence theory, we derive wave kinetic equations that govern the coupled evolution of the spectra of massive and massless waves. We first consider the thermodynamic solutions to these equations and study the wave condensation transition, which is the classical equivalent of Bose-Einstein condensation. We then focus on nonlocal interactions in wavenumber space: we study the decay of an ensemble massive particles into massless ones. Under rather general conditions, these massless particles accumulate at low wavenumber. We study the dynamics of waves coexisting with such a strong condensate, and we compute rigorously a nonlocal Kolmogorov-Zakharov solution, where particles are transferred non-locally to the condensate, while energy cascades towards large wave numbers through local interactions. This nonlocal cascading state constitute the intermediate asymptotics between the initial distribution of waves and the thermodynamic state reached in the long-time limit.

  1. SpaceWire model development technology for satellite architecture.

    SciTech Connect (OSTI)

    Eldridge, John M.; Leemaster, Jacob Edward; Van Leeuwen, Brian P.

    2011-09-01

    Packet switched data communications networks that use distributed processing architectures have the potential to simplify the design and development of new, increasingly more sophisticated satellite payloads. In addition, the use of reconfigurable logic may reduce the amount of redundant hardware required in space-based applications without sacrificing reliability. These concepts were studied using software modeling and simulation, and the results are presented in this report. Models of the commercially available, packet switched data interconnect SpaceWire protocol were developed and used to create network simulations of data networks containing reconfigurable logic with traffic flows for timing system distribution.

  2. MULTIBEAM SATELLITE RESOURCE ALLOCATION FOR SIMULTANEOUS TRANSFER OF INFORMATION AND POWER

    E-Print Network [OSTI]

    on energy harvesting in cellular network scenarios. In this paper, we address a problem of simultaneous network [8, 9], which consists of satellites and terrestrial subnets, can feed solar power from the space & Technology (DGIST), Korea jhchoi@dgist.ac.kr Changhee Joo School of Electrical and Computer Engineering

  3. A new class ${\\hat o}_N$ of statistical models: Transfer matrix eigenstates, chain Hamiltonians, factorizable $S$-matrix

    E-Print Network [OSTI]

    B. Abdesselam; A. Chakrabarti

    2006-07-20

    Statistical models corresponding to a new class of braid matrices ($\\hat{o}_N; N\\geq 3$) presented in a previous paper are studied. Indices labeling states spanning the $N^r$ dimensional base space of $T^{(r)}(\\theta)$, the $r$-th order transfer matrix are so chosen that the operators $W$ (the sum of the state labels) and (CP) (the circular permutation of state labels) commute with $T^{(r)}(\\theta)$. This drastically simplifies the construction of eigenstates, reducing it to solutions of relatively small number of simultaneous linear equations. Roots of unity play a crucial role. Thus for diagonalizing the 81 dimensional space for N=3, $r=4$, one has to solve a maximal set of 5 linear equations. A supplementary symmetry relates invariant subspaces pairwise ($W=(r,Nr)$ and so on) so that only one of each pair needs study. The case N=3 is studied fully for $r=(1,2,3,4)$. Basic aspects for all $(N,r)$ are discussed. Full exploitation of such symmetries lead to a formalism quite different from, possibly generalized, algebraic Bethe ansatz. Chain Hamiltonians are studied. The specific types of spin flips they induce and propagate are pointed out. The inverse Cayley transform of the YB matrix giving the potential leading to factorizable $S$-matrix is constructed explicitly for N=3 as also the full set of $\\hat{R}tt$ relations. Perspectives are discussed in a final section.

  4. Announced Dynamic Access Probability protocol for next generation wireless networks

    E-Print Network [OSTI]

    Levy, Hanoch

    Announced Dynamic Access Probability protocol for next generation wireless networks Z. NAOR #3; H probability. Keywords: wireless networks, multiple access, MAC #3; naorz@post.tau.ac.il y hanoch@cs.tau.ac.il 1 #12; 1 Introduction Wireless networks are rapidly expanding. Future satellite-based networks

  5. Tracking target objects orbiting earth using satellite-based telescopes

    DOE Patents [OSTI]

    De Vries, Willem H; Olivier, Scot S; Pertica, Alexander J

    2014-10-14

    A system for tracking objects that are in earth orbit via a constellation or network of satellites having imaging devices is provided. An object tracking system includes a ground controller and, for each satellite in the constellation, an onboard controller. The ground controller receives ephemeris information for a target object and directs that ephemeris information be transmitted to the satellites. Each onboard controller receives ephemeris information for a target object, collects images of the target object based on the expected location of the target object at an expected time, identifies actual locations of the target object from the collected images, and identifies a next expected location at a next expected time based on the identified actual locations of the target object. The onboard controller processes the collected image to identify the actual location of the target object and transmits the actual location information to the ground controller.

  6. Experimental Single-Photon Transmission from Satellite to Earth

    E-Print Network [OSTI]

    Juan Yin; Yuan Cao; Shu-Bin Liu; Ge-Sheng Pan; Jin-Hong Wang; Tao Yang; Zhong-Ping Zhang; Fu-Min Yang; Yu-Ao Chen; Cheng-Zhi Peng; Jian-Wei Pan

    2013-06-04

    Free-space quantum communication with satellites opens a promising avenue for global secure quantum network and large-scale test of quantum foundations. Recently, numerous experimental efforts have been carried out towards this ambitious goal. However, one essential step - transmitting single photons from the satellite to the ground with high signal-to-noise ratio (SNR) at realistic environments - remains experimental challenging. Here, we report a direct experimental demonstration of the satellite-ground transmission of a quasi-single-photon source. In the experiment, single photons (~0.85 photon per pulse) are generated by reflecting weak laser pulses back to earth with a cube-corner retro-reflector on the satellite Champ, collected by a 600-mm diameter telescope at the ground station, and finally detected by single-photon counting modules (SPCMs) after 400-km free-space link transmission. With the help of high accuracy time synchronization, narrow receiver field-of-view (FOV) and high-repetition-rate pulses (76 MHz), a SNR of better than 16:1 is obtained, which is sufficient for a secure quantum key distribution. Our experimental results represent an important step towards satellite-ground quantum communication.

  7. Network Management Network Management

    E-Print Network [OSTI]

    Giaccone, Paolo

    Network Management Pag. 1 Network Management Network management and QoS provisioning - 1Andrea of this license visit: http://creativecommons.org/licenses/by-nc- /3 0/ Network management and QoS provisioning ­ Chapter 9, Network Management, of the book Jim Kurose, Keith Ross, Computer Networking, A Top Down

  8. WARM SPITZER AND PALOMAR NEAR-IR SECONDARY ECLIPSE PHOTOMETRY OF TWO HOT JUPITERS: WASP-48b AND HAT-P-23b

    E-Print Network [OSTI]

    O'Rourke, Joseph G.

    We report secondary eclipse photometry of two hot Jupiters, WASP-48b and HAT-P-23b, at 3.6 and 4.5 ?m taken with the InfraRed Array Camera aboard the Spitzer Space Telescope during the warm Spitzer mission and in the H and ...

  9. Characterizing switching problems in low earth orbit satellite constellations with satellite failures 

    E-Print Network [OSTI]

    Wadsworth, Brandon Scott

    1999-01-01

    In this research, we study the ability of LEO satellite constellations to handle data traffic. LEO satellites offer a number of advantages over traditional space based communications via geosynchronous orbit satellites (GEO). However...

  10. Chameleon gravity and satellite geodesy

    E-Print Network [OSTI]

    J. R. Morris

    2014-09-29

    We consider the possibility of the detection of a chameleon effect by an earth orbiting satellite such as LAGEOS, and possible constraints that might be placed on chameleon model parameters. Approximate constraints presented here result from using a simple monopole approximation for the gravitational field of the earth, along with results from the Khoury-Weltman chameleon model, solar system constraints obtained from the Cassini mission, and parameter bounds obtained from the LAGEOS satellite. It is furthermore suggested that a comparison of ground-based and space-based multipole moments of the geopotential could reveal a possible chameleon effect.

  11. A computational method for solving stochastic Itô–Volterra integral equations based on stochastic operational matrix for generalized hat basis functions

    SciTech Connect (OSTI)

    Heydari, M.H.; Hooshmandasl, M.R.; Maalek Ghaini, F.M.; Cattani, C.

    2014-08-01

    In this paper, a new computational method based on the generalized hat basis functions is proposed for solving stochastic Itô–Volterra integral equations. In this way, a new stochastic operational matrix for generalized hat functions on the finite interval [0,T] is obtained. By using these basis functions and their stochastic operational matrix, such problems can be transformed into linear lower triangular systems of algebraic equations which can be directly solved by forward substitution. Also, the rate of convergence of the proposed method is considered and it has been shown that it is O(1/(n{sup 2}) ). Further, in order to show the accuracy and reliability of the proposed method, the new approach is compared with the block pulse functions method by some examples. The obtained results reveal that the proposed method is more accurate and efficient in comparison with the block pule functions method.

  12. Network Management Network Management

    E-Print Network [OSTI]

    Giaccone, Paolo

    Network Management Pag. 1 Network Management Andrea Bianco Telecommunication Network Group Network management and QoS provisioning - 1Andrea Bianco ­ TNG group - Politecnico di Torino Telecommunication management and QoS provisioning - 2Andrea Bianco ­ TNG group - Politecnico di Torino Stanford, California

  13. Remedial Action Plan and site design for stabilization of the inactive uranium mill tailings site at Mexican Hat, Utah: Appendix D. Final report

    SciTech Connect (OSTI)

    NONE

    1988-07-01

    This appendix is an assessment of the present conditions of the inactive uranium mill site near Mexican Hat, Utah. It consolidates available engineering, radiological, geotechnical, hydrological, meteorological, and other information pertinent to the design of the Remedial Action Plan. Plan is to characterize the conditions at the mill and tailings site so that the Remedial Action Contractor may complete final designs of the remedial action.

  14. Is $\\hat{q}$ a physical quantity or just a parameter? and other unanswered questions in High-$p_T$ Physics

    E-Print Network [OSTI]

    M. J. Tannenbaum

    2015-04-14

    The many different theoretical studies of energy loss of a quark or gluon traversing a medium have one thing in common: the transport coefficient of a gluon in the medium, $\\hat{q}$, which is defined as the mean 4-momentum transfer$^2$, $\\leftright>$, by a gluon to the medium per gluon mean free path, $\\lambda_{\\rm mfp}$. In the original BDMPSZ formalism, the energy loss of an outgoing parton, $-dE/dx$, per unit length ($x$) of a medium with total length $L$, due to coherent gluon bremsstrahlung, is proportional to the $\\leftright>$ and takes the form: ${-dE/dx }\\simeq \\alpha_s \\leftright>=\\alpha_s\\, \\mu^2\\, L/\\lambda_{\\rm mfp} =\\alpha_s\\, \\hat{q}\\, L\\ $ , where $\\mu$, is the mean momentum transfer per collision. Thus, the total energy loss in the medium goes like $L^2$. Additionally, the accumulated momentum$^2$, $\\leftright>$, transverse to a gluon traversing a length $L$ in the medium is well approximated by $\\leftright>\\approx\\leftright>=\\hat{q}\\, L$. A simple estimate shows that the $\\leftright>\\approx\\hat{q}\\,L$ should be observable at RHIC at $\\sqrt{s_{NN}}=200$ GeV via the broadening of di-hadron azimuthal correlations resulting in an azimuthal width $\\sim\\sqrt{2}$ larger in Au$+$Au than in $p+p$ collisions . Measurements relevant to this issue will be discussed as well as recent STAR jet results presented at QM2014. Other topics to be discussed include the danger of using forward energy to define centrality in $p(d)+$A collisions for high $p_T$ measurements, the danger of not using comparison $p+p$ data at the same $\\sqrt{s}$ in the same detector for $R_{AA}$ or lately for $R_{pA}$ measurements.

  15. The application of the Mid-IR radio correlation to the $\\hat{G}$ sample and the search for advanced extraterrestrial civilisations

    E-Print Network [OSTI]

    Garrett, Michael

    2015-01-01

    Wright et al. 2014 have embarked on a search for advanced Karadashev Type III civilisations via the compilation of a sample of sources with extreme mid-IR emission and colours. In this scenario, the mid-IR emission is then primarily associated with waste heat energy by-products. I apply the Mid-IR radio correlation to this $\\hat{G}$ sample (Griffith et al. 2015). I demonstrate that the mid-IR and radio luminosities are correlated for the sample with $q_{22}=1.35\\pm0.42 $. By comparison, the First Look Survey (FLS) has $q_{22}=0.87\\pm0.27$. The fact that the G-HAT sample largely follows the Mid-IR radio correlation, strongly suggests the vast majority of these sources are associated with galaxies in which natural astrophysical processes are dominant. This simple application of the mid-IR radio correlation can substantially reduce the number of false positives in the $\\hat{G}$ catalogue, since galaxies occupied by advanced Kardashev Type III civilisations would be expected to exhibit very high values of $q$. In...

  16. Remedial Action Plan and site design for stabilization of the inactive uranium mill tailings site at Mexican Hat, Utah: Text, Appendices A--C. Final report

    SciTech Connect (OSTI)

    NONE

    1988-07-01

    This Remedial Action Plan (RAP) has been developed to serve a two- fold purpose. It presents the activities proposed by the Department of Energy (DOE) to accomplish long-term stabilization and control of the residual radioactive materials (RRM) from Monument Valley Arizona, and Mexican Hat, Utah, at the Mexican Hat disposal site. It also serves to document the concurrence of both the Navajo Nation and the Nuclear Regulatory Commission (NRC) in the remedial action. This agreement, upon execution by DOE and the Navajo Nation and concurrence by the NRC, becomes Appendix B of the Cooperative Agreement. This document has been structured to provide a comprehensive understanding of the remedial action proposed for the Monument Valley and Mexican Hat sites. It includes specific design and construction requirements for the remedial action. Pertinent information and data are included with reference given to the supporting documents. Appendices A,B, and C are provided as part of this document. Appendix A presents regulatory compliance issues, Appendix B provides details of the engineering design, and Appendix C presents the radiological support plan.

  17. CCRS Landcover Maps From Satellite Data

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

    Trishchenko, Alexander

    The Canadian Centre for Remote Sensing (CCRS) presents several landcover maps over the SGP CART site area (32-40N, 92-102W) derived from satellite data including AVHRR, MODIS, SPOT vegetation data, and Landsat satellite TM imagery.

  18. CCRS Landcover Maps From Satellite Data

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

    Trishchenko, Alexander

    2008-01-15

    The Canadian Centre for Remote Sensing (CCRS) presents several landcover maps over the SGP CART site area (32-40N, 92-102W) derived from satellite data including AVHRR, MODIS, SPOT vegetation data, and Landsat satellite TM imagery.

  19. Research Councils UK Satellites and

    E-Print Network [OSTI]

    Crowther, Paul

    data and energy-efficient computing; Satellites and commercial applications of space; Robotics and nanotechnology; and Energy and its storage. Space has an important influence on our everyday lives and is one, the UK space industry is strong and growing, with a favourable balance of commercial and public sector

  20. Satellite Radio: Its Global Impact

    E-Print Network [OSTI]

    Udgaonkar, Jayant B.

    Satellite Radio: Its Global Impact TIFR Alumni Lecture By S.Rangarajan #12;1 A wonder called RADIO "No wonder so many physicists started as radio tinkers, and no wonder, before physicist became on Richard Feynmann We will stick to the definition of Radio as · Wireless Audio Delivery ·Listener cannot

  1. Data Network Equipment Energy Use and Savings Potential in Buildings

    E-Print Network [OSTI]

    Lanzisera, Steven

    2010-01-01

    separate router with combined wireless and wired capabilityrouter. The category of “Other Customer Premises Equipment” covers users of satellite, fixed wireless, androuters, firewalls, modems (service provider and customer premises equipment), network security appliances, and wireless

  2. Satellite-Based Solar Resource Data Sets for India 2002-2012

    SciTech Connect (OSTI)

    Sengupta, M.; Perez, R.; Gueymard, C.; Anderberg, M.; Gotseff, P.

    2014-02-01

    A new 10-km hourly solar resource product was created for India. This product was created using satellite radiances from the Meteosat series of satellites. The product contains global horizontal irradiances (GHI) and direct normal irradiances (DNI) for the period from 2002 to 2011. An additional solar resource data set covering the period from January 2012 to June 2012 was created solely for validation because this period overlaps ground measurements that were made available from the Indian Ministry of New and Renewable Energy's (MNRE's) National Institute for Solar Energy for five stations that are part of MNRE's solar resource network. These measurements were quality checked using the SERI QC software and used to validate the satellite product. A comparison of the satellite product to the ground measurements for the five stations shows good agreement. This report also presents a comparison of the new version of solar resource data to the previous version, which covered the period from 2002 to 2008.

  3. TCP Extensions for Wireless Networks Nachiket Deshpande, deshpand@cis.ohio-state.edu

    E-Print Network [OSTI]

    Jain, Raj

    TCP Extensions for Wireless Networks Nachiket Deshpande, deshpand@cis.ohio-state.edu http the packet losses are mainly due to congestion. Wireless networks are characterized by losses due performance of TCP in wireless networks. Proposed schemes for satellite networks are also discussed. See Also

  4. Electromagnetic Formation Flight of Satellite Arrays

    E-Print Network [OSTI]

    Electromagnetic Formation Flight of Satellite Arrays Daniel W. Kwon and David W. Miller February 2005 SSL # 2-05 #12;#12;Electromagnetic Formation Flight of Satellite Arrays By DANIEL W. KWON S;#12;Electromagnetic Formation Flight of Satellite Arrays by DANIEL W. KWON Submitted to the Department of Aeronautics

  5. Satellite Meteorology and Climatology Division Roadmap

    E-Print Network [OSTI]

    Kuligowski, Bob

    Satellite Meteorology and Climatology Division Roadmap NOAA NESDIS Center for Satellite Applications and Research #12;SMCD Roadmap 2 NOAA/NESDIS/STAR Satellite Meteorology and Climatology Division Roadmap September 2005 NOAA Science Center, 5200 Auth Road, Room 712, Camp Springs, MD 20746 #12;SMCD

  6. The orbital poles of Milky Way satellite galaxies: a rotationally supported disc-of-satellites

    E-Print Network [OSTI]

    Manuel Metz; Pavel Kroupa; Noam I. Libeskind

    2008-02-26

    Available proper motion measurements of Milky Way (MW) satellite galaxies are used to calculate their orbital poles and projected uncertainties. These are compared to a set of recent cold dark-matter (CDM) simulations, tailored specifically to solve the MW satellite problem. We show that the CDM satellite orbital poles are fully consistent with being drawn from a random distribution, while the MW satellite orbital poles indicate that the disc-of-satellites of the Milky Way is rotationally supported. Furthermore, the bootstrapping analysis of the spatial distribution of theoretical CDM satellites also shows that they are consistent with being randomly drawn. The theoretical CDM satellite population thus shows a significantly different orbital and spatial distribution than the MW satellites, most probably indicating that the majority of the latter are of tidal origin rather than being DM dominated sub-structures. A statistic is presented that can be used to test a possible correlation of satellite galaxy orbits with their spatial distribution.

  7. Atmospheric structure determined from satellite data 

    E-Print Network [OSTI]

    Knight, Keith Shelburne

    1978-01-01

    Subject: Meteorology ATM)SPHERIC STRUCTURE DETEiUIINED FRDM SATELLITE DATA A Thesis XEITH SHELBURNE KNIGHT Approved as to style and content. hyi (Chairman of Cor ' iee) C. (Head of Department) (Miemher) ABSTRACT Atmospheric Structure Determined... from Satellite Data. (August 1978) Keith Shelburne Knight, B. A. , University of California at Los Angeles Chairman of Advisory Conmittee: Dr. James R. Scoggins The capabilities of the Nimbus-6 satellite sounding data for use in synoptic analysis...

  8. Dynamic channel allocation in satellite and wireless networks

    E-Print Network [OSTI]

    Sun, Jun, 1975-

    2007-01-01

    The objective of this thesis is to understand how to utilize wireless channels in a fair and efficient manner within a multi-users communication environment. We start by exploring the allocation of a single wireless downlink ...

  9. Satellites of the largest Kuiper belt objects

    E-Print Network [OSTI]

    M. E. Brown; M. A. van Dam; A. H. Bouchez; D. Le Mignant; R. D. Campbell; J. C. Y. Chin; A. Conrad; S. K. Hartman; E. M. Johansson; R. E. Lafon; D. L. Rabinowitz; P. J. Stomski, Jr.; D. M. Summers; C. A. Trujillo; P. L. Wizinowich

    2005-10-03

    We have searched the four brightest objects in the Kuiper belt for the presence of satellites using the newly commissioned Keck Observatory Laser Guide Star Adaptive Optics system. Satellites are seen around three of the four objects: Pluto (whose satellite Charon is well-known), 2003 EL61, and 2003 UB313. The object 2005 FY9, the brightest Kuiper belt object after Pluto, does not have a satellite detectable within 0.4 arcseconds with a brightness of more than 0.5% of the primary. The presence of satellites to 3 of the 4 brightest Kuiper belt objects is inconsistent with the fraction of satellites in the Kuiper belt at large at the 99.1% confidence level, suggesting a different formation mechanism for these largest KBO satellites. The satellites of 2003 EL61 and 2003 UB313, with fractional brightnesses of 5% and 2% of their primaries, respectively, are significantly fainter relative to their primaries than other known Kuiper belt object satellites, again pointing to possible differences in their origin.

  10. AbstractThe satellite-borne

    E-Print Network [OSTI]

    Kansas, University of

    , the contributions from the vertical components of wind vectors are small and can therefore be ignoredAbstract­The satellite-borne Scanning for a Satellite Radar Wind Sounder (RAWS) RK Moore, B. Beh Radar Wind Sounder (RAWS) is a proposed radar capable of measuring wind alofi using Doppler shifts

  11. Hydrogen peroxide propulsion for smaller satellites (SSC98-VIII...

    Office of Scientific and Technical Information (OSTI)

    Conference: Hydrogen peroxide propulsion for smaller satellites (SSC98-VIII-1) Citation Details In-Document Search Title: Hydrogen peroxide propulsion for smaller satellites...

  12. Studies on Replication of Cucumber Mosaic Virus Satellite RNA

    E-Print Network [OSTI]

    Choi, Soon Ho

    2011-01-01

    of the satellite of peanut stunt virus reveals structuralrepresenting two subgroups of peanut stunt virus strains:the satellite RNA of peanut stunt virus ( PSV) nucleotide

  13. Modification to the Remedial Action Plan and site design for stabilization of the inactive uranium mill tailings site at Mexican Hat, Utah: Volume 1, Text, Attachments 1--6. Final report

    SciTech Connect (OSTI)

    NONE

    1989-01-01

    This document provides the modifications to the 1988 Remedial Action Plan (RAP) of the contaminated materials at the Monument Valley, Arizona, and Mexican Hat, Utah. The text detailing the modifications and attachments 1 through 6 are provided with this document. The RAP was developed to serve a two-fold purpose. It presents the activities proposed by the Department of Energy (DOE) to accomplish long-term stabilization and control of the residual radioactive materials (RRM) from Monument Valley, Arizona, and Mexican Hat, Utah, at the Mexican Hat disposal site. It also serves to document the concurrence of both the Navajo Nation and the Nuclear Regulatory Commission (NRC) in the remedial action. This agreement, upon execution by DOE and the Navajo Nation and concurrence by the NRC, becomes Appendix B of the Cooperative Agreement. This document has been structured to provide a comprehensive understanding of the remedial action proposed for the Monument Valley and Mexican Hat sites. It includes specific design and construction requirements for the remedial action. Pertinent information and data are included with reference given to the supporting documents.

  14. Everlab A Production Platform For Research In Network Experimenta-

    E-Print Network [OSTI]

    Kirkpatrick, Scott

    RedHat EL2 in- stalled. Some of the local system administrators changed the operating system to Fedora

  15. Emerging trends in the satellite industry

    E-Print Network [OSTI]

    Salazar, Vagn Knudsen

    2012-01-01

    Risk aversion in the satellite industry has fostered long development cycles and low rates of innovation in the past. Emerging trends in propulsion technology development and spacecraft architecture design could lead to ...

  16. Simulation Methodologies for Satellite Solar Array Dynamics 

    E-Print Network [OSTI]

    Mohsenizadeh, Navid

    2010-07-16

    The purpose of the present thesis is to furnish diverse studies on the dynamic response of satellite solar arrays. The term flexible structure or, briefly, structure has different interpretations and definitions, depending ...

  17. Dynamics and control of electromagnetic satellite formations

    E-Print Network [OSTI]

    Ahsun, Umair, 1972-

    2007-01-01

    Satellite formation flying is an enabling technology for many space missions, especially for space-based telescopes. Usually there is a tight formation-keeping requirement that may need constant expenditure of fuel or at ...

  18. Synthetic Aperture Radar Interferometry with 3 satellites

    E-Print Network [OSTI]

    Wong, Wallace D. (Wallace Dazheng)

    2005-01-01

    Our study investigates interferometric SAR (InSAR) post-processing height retrieval techniques. We explore the possible improvements by adding a third satellite to the two already in orbit, and examine some potential uses ...

  19. MFR PAPER 1230 Finding Fish With Satellites

    E-Print Network [OSTI]

    sensors, fishing vessels , spotter pilots, research vessels, and offshore oil platforms were used Investigation? A. It is an attempt to find out if satellites can help fishermen find fish. Our assumption

  20. Estimating solar irradiance using a geostationary satellite

    E-Print Network [OSTI]

    Urquhart, Bryan Glenn

    2011-01-01

    from meteorological satellite data. Solar Energy 37, 31–39.specific irradiance data. Solar Energy 60, 89–96. Perez R. ,16 independent data banks. Solar Energy 80, 468–478 Kasten

  1. Estimating solar irradiance using a geostationary satellite

    E-Print Network [OSTI]

    Urquhart, Bryan Glenn

    2011-01-01

    1995). In National Solar Radiation Data Base—Final Technicalobtained from the Solar Radiation Data Service (WR7). 4.3.3global solar radiation from meteorological satellite data.

  2. The reionization of galactic satellite populations

    SciTech Connect (OSTI)

    Ocvirk, P.; Gillet, N.; Aubert, D.; Chardin, J. [Observatoire Astronomique de Strasbourg, Université de Strasbourg, CNRS UMR 7550, 11 rue de l'Université, F-67000 Strasbourg (France); Knebe, A.; Yepes, G. [Grupo de Astrofísica, Departamento de Fisica Teorica, Modulo C-8, Universidad Autónoma de Madrid, Cantoblanco E-280049 (Spain); Libeskind, N.; Gottlöber, S. [Leibniz-Institute für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam (Germany); Hoffman, Y. [Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel)

    2014-10-10

    We use high-resolution simulations of the formation of the local group, post-processed by a radiative transfer code for UV photons, to investigate the reionization of the satellite populations of an isolated Milky Way-M31 galaxy pair in a variety of scenarios. We use an improved version of ATON which includes a simple recipe for radiative feedback. In our baseline models, reionization is initiated by low-mass, radiatively regulated halos at high redshift, until more massive halos appear, which then dominate and complete the reionization process. We investigate the relation between reionization history and present-day positions of the satellite population. We find that the average reionization redshift (z {sub r}) of satellites is higher near galaxy centers (MW and M31). This is due to the inside out reionization patterns imprinted by massive halos within the progenitor during the epoch of reionization, which end up forming the center of the galaxy. Due to incomplete dynamical mixing during galaxy assembly, these early patterns survive to present day, resulting in a clear radial gradient in the average satellite reionization redshift, up to the virial radius of MW and M31 and beyond. In the lowest emissivity scenario, the outer satellites are reionized about 180 Myr later than the inner satellites. This delay decreases with increasing source model emissivity, or in the case of external reionization by Virgo or M31, because reionization occurs faster overall and becomes spatially quasi-uniform at the highest emissivity.

  3. THE ORBITS OF NEPTUNE'S OUTER SATELLITES

    SciTech Connect (OSTI)

    Brozovic, Marina; Jacobson, Robert A.; Sheppard, Scott S. E-mail: raj@jpl.nasa.gov

    2011-04-15

    In 2009, we used the Subaru telescope to observe all the faint irregular satellites of Neptune for the first time since 2004. These observations extend the data arcs for Halimede, Psamathe, Sao, Laomedeia, and Neso from a few years to nearly a decade. We also report on a search for unknown Neptune satellites in a half-square degree of sky and a limiting magnitude of 26.2 in the R band. No new satellites of Neptune were found. We numerically integrate the orbits for the five irregulars and summarize the results of the orbital fits in terms of the state vectors, post-fit residuals, and mean orbital elements. Sao and Neso are confirmed to be Kozai librators, while Psamathe is a 'reverse circulator'. Halimede and Laomedeia do not seem to experience any strong resonant effects.

  4. Soviet satellite communications science and technology

    SciTech Connect (OSTI)

    Birch, J.N.; Campanella, S.J.; Gordon, G.D.; McElroy, D.R.; Pritchard, W.L.; Stamminger, R.

    1991-08-01

    This is a report by six US scientists and engineers concerning the current state of the art and projections of future Soviet satellite communications technologies. The panel members are experts in satellite stabilization, spacecraft environments, space power generation, launch systems, spacecraft communications sciences and technologies, onboard processing, ground stations, and other technologies that impact communications. The panel assessed the Soviet ability to support high-data-rate space missions at 128 Mbps by evaluating current and projected Soviet satellite communications technologies. A variety of space missions were considered, including Earth-to-Earth communications via satellites in geostationary or highly elliptical orbits, those missions that require space-to-Earth communications via a direct path and those missions that require space-to-Earth communications via a relay satellite. Soviet satellite communications capability, in most cases, is 10 years behind that of the United States and other industrialized nations. However, based upon an analysis of communications links needed to support these missions using current Soviet capabilities, it is well within the current Soviet technology to support certain space missions outlined above at rates of 128 Mbps or higher, although published literature clearly shows that the Soviet Union has not exceeded 60 Mbps in its current space system. These analyses are necessary but not sufficient to determine mission data rates, and other technologies such as onboard processing and storage could limit the mission data rate well below that which could actually be supported via the communications links. Presently, the Soviet Union appears to be content with data rates in the low-Earth-orbit relay via geostationary mode of 12 Mbps. This limit is a direct result of power amplifier limits, spacecraft antenna size, and the utilization of K{sub u}-band frequencies. 91 refs., 16 figs., 15 tabs.

  5. Broad-band spectrophotometry of the hot Jupiter HAT-P-12b from the near-UV to the near-IR

    E-Print Network [OSTI]

    Mallonn, M; Weingrill, J; von Essen, C; Strassmeier, K G; Piotto, G; Pagano, I; Scandariato, G; Csizmadia, Sz; Herrero, E; Sada, P V; Dhillon, V S; Marsh, T R; Künstler, A; Bernt, I; Granzer, T

    2015-01-01

    The detection of trends or gradients in the transmission spectrum of extrasolar planets is possible with observations at very low spectral resolution. Transit measurements of sufficient accuracy using selected broad-band filters allow for an initial characterization of the atmosphere of the planet. We obtained time series photometry of 20 transit events and analyzed them homogeneously, along with eight light curves obtained from the literature. In total, the light curves span a range from 0.35 to 1.25 microns. During two observing seasons over four months each, we monitored the host star to constrain the potential influence of starspots on the derived transit parameters. We rule out the presence of a Rayleigh slope extending over the entire optical wavelength range, a flat spectrum is favored for HAT-P-12b with respect to a cloud-free atmosphere model spectrum. A potential cause of such gray absorption is the presence of a cloud layer at the probed latitudes. Furthermore, in this work we refine the transit pa...

  6. Spitzer Secondary Eclipses of the Dense, Modestly-irradiated, Giant Exoplanet HAT-P-20b Using Pixel-Level Decorrelation

    E-Print Network [OSTI]

    Deming, Drake; Kammer, Joshua; Fulton, Benjamin J; Ingalls, James; Carey, Sean; Burrows, Adam; Fortney, Jonathan J; Todorov, Kamen; Agol, Eric; Cowan, Nicolas; Desert, Jean-Michel; Fraine, Jonathan; Langton, Jonathan; Morley, Caroline; Showman, Adam P

    2014-01-01

    HAT-P-20b is a giant exoplanet that orbits a metal-rich star. The planet itself has a high total density, suggesting that it may also have a high metallicity in its atmosphere. We analyze two eclipses of the planet in each of the 3.6- and 4.5 micron bands of Warm Spitzer. These data exhibit intra-pixel detector sensitivity fluctuations that were resistant to traditional decorrelation methods. We have developed a simple, powerful, and radically different method to correct the intra-pixel effect for Warm Spitzer data, which we call pixel-level decorrelation (PLD). PLD corrects the intra-pixel effect very effectively, but without explicitly using - or even measuring - the fluctuations in the apparent position of the stellar image. We illustrate and validate PLD using synthetic and real data, and comparing the results to previous analyses. PLD can significantly reduce or eliminate red noise in Spitzer secondary eclipse photometry, even for eclipses that have proven to be intractable using other methods. Our succe...

  7. Telescope Spectrophotometric and Absolute Flux Calibration, and National Security Applications, Using a Tunable Laser on a Satellite

    E-Print Network [OSTI]

    Justin Albert; William Burgett; Jason Rhodes

    2006-05-19

    We propose a tunable laser-based satellite-mounted spectrophotometric and absolute flux calibration system, to be utilized by ground- and space-based telescopes. As spectrophotometric calibration may play a significant role in the accuracy of photometric redshift measurement, and photometric redshift accuracy is important for measuring dark energy using SNIa, weak gravitational lensing, and baryon oscillations, a method for reducing such uncertainties is needed. We propose to improve spectrophotometric calibration, currently obtained using standard stars, by placing a tunable laser and a wide-angle light source on a satellite by early next decade (perhaps included in the upgrade to the GPS satellite network) to improve absolute flux calibration and relative spectrophotometric calibration across the visible and near-infrared spectrum. As well as fundamental astrophysical applications, the system proposed here potentially has broad utility for defense and national security applications such as ground target illumination and space communication.

  8. Sensor networks for social networks

    E-Print Network [OSTI]

    Farry, Michael P. (Michael Patrick)

    2006-01-01

    This thesis outlines the development of software that makes use of Bayesian belief networks and signal processing techniques to make meaningful inferences about real-world phenomena using data obtained from sensor networks. ...

  9. Building technological capability within satellite programs in developing countries

    E-Print Network [OSTI]

    Wood, Danielle Renee

    2012-01-01

    Global participation in space activity is growing as satellite technology matures and spreads. Countries in Africa, Asia and Latin America are creating or reinvigorating national satellite programs. These countries are ...

  10. Regional Navigation System Using Geosynchronous Satellites and Stratospheric Airships

    E-Print Network [OSTI]

    Won, Chang-Hee

    - 1 - Regional Navigation System Using Geosynchronous Satellites and Stratospheric Airships Chang navigation system using geosynchronous satellites and stratospheric airships. One important factor and stratospheric airships for the urban areas. In the beginning stage, the system would augment the existing GPS

  11. Achieving broad access to satellite control research with zero robotics

    E-Print Network [OSTI]

    Katz, Jacob G

    2013-01-01

    Since operations began in 2006, the SPHERES facility, including three satellites aboard the International Space Station (ISS), has demonstrated many future satellite technologies in a true microgravity environment and ...

  12. Title: Geoeye Satellite Image of North York, Ontario Data Creator /

    E-Print Network [OSTI]

    Title: Geoeye Satellite Image of North York, Ontario Data Creator / Copyright Owner: Geo, Ontario; North York, Ontario; York University, Ontario Keywords (Subject): Satellite Imagery, Aerial Scene, North York Ontario, September 1, 2009". Thorton Colorado:, Geoeye Inc., 2009. Vendor Link: http

  13. Ocean Surface Currents From Geostationary Satellite SST

    E-Print Network [OSTI]

    Kurapov, Alexander

    Ocean Surface Currents From Geostationary Satellite SST -We are implementing and evaluating a feature tracking approach to estimate ocean surface currents. - This approach allows us to estimate://cioss.coas.oregonstate.edu/ Ocean surface currents (vectors) derived from SST (background) modeled fields along the west coast of U

  14. Satellite Navigation in Vietnam & The NAVIS Centre

    E-Print Network [OSTI]

    Sekercioglu, Y. Ahmet

    Satellite Navigation in Vietnam & The NAVIS Centre TA HAI TUNG (PhD) NAVIS CentreKme predefined incidents occurring; or each 30 s #12;"The mission of Navis is to boost, in South-East Asia." hcp://navis.hust.edu.vn #12;(Source: Mul,-GNSS Asia) #12;Milestones

  15. NASA Launches Next-Generation Communications Satellite

    E-Print Network [OSTI]

    Christian, Eric

    NASA Launches Next-Generation Communications Satellite Pg 3 Triumph Over Tragedy: Columbia's Last Mission Pg 6 Goddard Day of Remembrance Pg 9 National Aeronautics and Space Administration www.nasa.gov Volume 9 Issue 1 February 2013 #12;T he first of NASA's three next-generation Tracking and Data Relay

  16. NASA Launches Next-Generation Communications Satellite

    E-Print Network [OSTI]

    Christian, Eric

    .nasa.gov Volume 9 Issue 1 February 2013 #12;T he first of NASA's three next-generation Tracking and Data Relay Space Launch Complex-41. After a three-month test phase, NASA will accept the spacecraft for additional rocket blasts off from Space Launch Complex-41 with NASA's Tracking and Data Relay Satellite (TDRS

  17. DISASTER RECOVERY APPLICATIONS FOR SATELLITE COMMUNICATIONS SYSTEMS

    E-Print Network [OSTI]

    Kruse, Hans

    in the ACTS system. Finally, we project possible applications for satellite based data communication services and possibly cooling systems) are backed up with in-house standby systems. Critical data bases are backed up Young, Chris Washburn J. Warren McClure School of Communication Systems Management Don Flournoy School

  18. NOAA/NMFS Developments Tracked By Satellite

    E-Print Network [OSTI]

    the Department of Energy to install a solar power heating and water heating system. The Grant is one of four- mitter. Electronic engineer Robert Timko of NOAA's National Marine Fisheries Service laboratory in Gal near Washington, D. C. , where they were processed by com- puter. Satellite tracking of turtles

  19. Offshore wind resource assessment through satellite images

    E-Print Network [OSTI]

    1 Slide no. 4 Offshore wind resource assessment through satellite images Charlotte Bay Hasager images for offshore wind ressource assessment in lieu of in-situ mast observations #12;4 Slide no Hasager, Dellwik, Nielsen and Furevik, 2004, Validation of ERS-2 SAR offshore wind-speed maps in the North

  20. Global Electrical Conductivity Magnetic Satellite Induction Studies

    E-Print Network [OSTI]

    Constable, Steve

    CHAMPMeeting, September2003 c S.Constable SCRIPPSINST ITUTION OF OCE ANOGRAPHY UCSD #12;Contents: · Background: Earth conductivity · Background: EM induction · Some satellite results 2ndCHAMPMeeting, September2003 c SCHAMPMeeting, September2003 c S.Constable SCRIPPSINST ITUTION OF OCE ANOGRAPHY UCSD #12;Conductivity of Earth materials

  1. NASA ACTS SATELLITE: A DISASTER RECOVERY TEST Dr. Hans Kruse

    E-Print Network [OSTI]

    Kruse, Hans

    NASA ACTS SATELLITE: A DISASTER RECOVERY TEST Dr. Hans Kruse School of Communications Systems In September 1993, NASA launched its long- awaited Advanced Communication Technology (ACTS) satellite. ACTS and opening of the Ka frequency band. Among the earliest of the tests on the new satellite was a NASA

  2. NOAA's National Environmental Satellite, Data, and Information Service

    E-Print Network [OSTI]

    weather satellite and information service · Center to protect electric grids and communications assets to support operational space weather monitoring and forecasting. NOAA Satellites Serve the Nation · NOAA satellites enable timely and accurate weather forecasts, watches, and warnings used by Federal, State

  3. Embedding planning technology into satellite systems David Kortenkamp

    E-Print Network [OSTI]

    Kortenkamp, David

    Embedding planning technology into satellite systems David Kortenkamp Pete Bonasso TRACLabs Inc. This paper describes an on-board planning and execution system for satellites that schedules system tasks mission, and an executive that takes the resulting plan and commands the satellite subsystems. A state

  4. Ris-R-1479(EN) Satellite information for wind energy

    E-Print Network [OSTI]

    Risø-R-1479(EN) Satellite information for wind energy applications Morten Nielsen, Poul Astrup Title: Satellite information for wind energy applications Department: Wind Energy Department Risø-R-1479.): An introduction to satellite information relevant for wind energy applications is given. It includes digital

  5. Cognitive Radio Networks as Sensor Networks

    E-Print Network [OSTI]

    Bandari, Dorna; Yang, Seung R.; Zhao, Yue; Pottie, Gregory

    2007-01-01

    assuming the cognitive radios know their own coordinates.Networked Sensing Cognitive Radio Networks As SensorIntroduction: Cognitive Radio (CR) Networks The Need For

  6. Modelling and control of satellite formations 

    E-Print Network [OSTI]

    Vaddi, Veera Venkata Sesha Sai

    2004-09-30

    ®erent satellites in a formation. To achieve the various mission objectives it is necessary for a formation to recon¯gure itself periodically. An analytical impulsive control scheme has been developed for this purpose. This control scheme has the distinct advantage... . . . . . . . . . . . . . . . . . . 15 1.4.2 Impulsive Control . . . . . . . . . . . . . . . . . . . 16 1.5 Goals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1.6 Nonlinearity and Eccentricity Perturbations . . . . . . . . 18 1.7 Linear and Nonlinear Controllers...

  7. Stereo Satellite Imagery | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-Enhancing CapacityVectren) JumpandStereo Satellite Imagery Jump to: navigation, search

  8. Why baryons matter: The kinematics of dwarf spheroidal satellites

    SciTech Connect (OSTI)

    Brooks, Alyson M. [Department of Astronomy, University of Wisconsin-Madison, 475 North Charter Street, Madison, WI 53706 (United States); Zolotov, Adi, E-mail: abrooks@physics.rutgers.edu, E-mail: zolotov@physics.huji.ac.il [Racah Institute of Physics, The Hebrew University, Jerusalem 91904 (Israel)

    2014-05-10

    We use high-resolution cosmological simulations of Milky Way (MW) mass galaxies that include both baryons and dark matter (DM) to show that baryonic physics (energetic feedback from supernovae and subsequent tidal stripping) significantly reduces the DM mass in the central regions of luminous satellite galaxies. The reduced central masses of the simulated satellites reproduce the observed internal dynamics of MW and M31 satellites as a function of luminosity. We use these realistic satellites to update predictions for the observed velocity and luminosity functions of satellites around MW-mass galaxies when baryonic effects are accounted for. We also predict that field dwarf galaxies in the same luminosity range as the MW classical satellites should not exhibit velocities as low as the satellites because the field dwarfs do not experience tidal stripping. Additionally, the early formation times of the satellites compared to field galaxies at the same luminosity may be apparent in the star formation histories of the two populations. Including baryonic physics in cold dark matter (CDM) models naturally explains the observed low DM densities in the MWs dwarf spheroidal population. Our simulations therefore resolve the tension between kinematics predicted in CDM theory and observations of satellites, without invoking alternative forms of DM.

  9. Remote Detection of Quaternary Borate Deposits with ASTER Satellite...

    Open Energy Info (EERE)

    Exploration Tool Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Remote Detection of Quaternary Borate Deposits with ASTER Satellite Imagery...

  10. Satellite remote sounding of mid-tropospheric CO 2

    E-Print Network [OSTI]

    2008-01-01

    are available in the HTML. doi:10.1029/ 2008GL035022. L17807are available in the HTML. L17807 CHAHINE ET AL. : SATELLITE

  11. Satellite Television Industry Meeting Regarding DOE Set-Top Box...

    Energy Savers [EERE]

    at the Forestall Building to discuss matters of concern to the U.S. satellite television industry regarding the pending DOE rulemaking to establish energy conservation standards...

  12. Systematic and random error components in satellite precipitation data sets

    E-Print Network [OSTI]

    AghaKouchak, Amir; Mehran, Ali; Norouzi, Hamidreza; Behrangi, Ali

    2012-01-01

    in satellite-based precipitation estimates, J. Geophys.Evaluating high-resolution precipitation products, Bull. Am.retrieved extreme precipitation rates across the central

  13. Energy Efficient Digital Networks

    E-Print Network [OSTI]

    Lanzisera, Steven

    2014-01-01

    equipment, market transformation for digital networks iimarket transformation of energy efficient digital networks.transformation activities. Table 7: Transforming the Network for Digital

  14. Groundwater Monitoring Network

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

    Groundwater Monitoring Network Groundwater Monitoring Network The network includes 92 natural sources, 102 regional aquifer wells, 41 intermediate-depth wells and springs, and 67...

  15. Ris-R-1298(EN) Validation of Satellite SAR Offshore

    E-Print Network [OSTI]

    resources, e.g. in future planning of offshore wind farms. The report describes the validation analysisRisø-R-1298(EN) Validation of Satellite SAR Offshore Wind Speed Maps to In-Situ Data, Microscale project goal is to develop a method for utilizing the satellite wind speed maps for offshore wind

  16. Quantifying Offshore Wind Resources from Satellite Wind Maps

    E-Print Network [OSTI]

    Pryor, Sara C.

    the spatial extent of the wake behind large offshore wind farms. Copyright © 2006 John Wiley & Sons, LtdQuantifying Offshore Wind Resources from Satellite Wind Maps: Study Area the North Sea C. B National Laboratory, Roskilde, Denmark Offshore wind resources are quantified from satellite synthetic

  17. Greenland snow accumulation estimates from satellite radar scatterometer data

    E-Print Network [OSTI]

    Long, David G.

    Greenland snow accumulation estimates from satellite radar scatterometer data Mark R. DrinkwaterWinds on QuikScat (QSCAT) satellite instruments are used to illustrate spatiotemporal variability in snow in backscatter, B, in the range 20 ­60 are compared with historical snow accumulation data and recent

  18. Compliance of Hazardous Waste Satellite Accumulation Areas (SAAs)

    E-Print Network [OSTI]

    Compliance of Hazardous Waste Satellite Accumulation Areas (SAAs) All Hazardous waste generated to be chemically hazardous and shall be kept in a Satellite Accumulation Area (SAA). The safety coordinator will keep a list of all SAA's in the division and must be notified before an accumulation area

  19. Heuristics for Robust Resource Allocation of Satellite Weather Data Processing

    E-Print Network [OSTI]

    Maciejewski, Anthony A. "Tony"

    --This work considers the satellite data processing portion of a space-based weather monitoring systemHeuristics for Robust Resource Allocation of Satellite Weather Data Processing on a Heterogeneous INTRODUCTION THE space-based weather monitoring system considered in this work consists of two major components

  20. Global assessment of ocean carbon export by combining satellite observations

    E-Print Network [OSTI]

    Siegel, David A.

    Global assessment of ocean carbon export by combining satellite observations and food-web models D Studies, University of Tasmania, Hobart, Tasmania, Australia Abstract The export of organic carbon from cycle. Here we introduce a mechanistic assessment of the global ocean carbon export using satellite

  1. Title: IKONOS Satellite Image of North York, Ontario Data Creator /

    E-Print Network [OSTI]

    Title: IKONOS Satellite Image of North York, Ontario Data Creator / Copyright Owner: Geo.313 degrees Index Map: N/A Keywords (Place): Toronto, Ontario Keywords (Subject): Satellite Imagery, Aerial/Panchromatic Orthorectified Scene, Toronto Ontario, July 3, 2007". Thorton Colorado:, Geoeye Inc., 2007. Vendor Link: http

  2. First satellite observations of lower tropospheric ammonia and methanol

    E-Print Network [OSTI]

    First satellite observations of lower tropospheric ammonia and methanol Reinhard Beer,1 Mark W) and methanol (CH3OH), well above the normal background levels. This is the first time that these molecules have. Citation: Beer, R., et al. (2008), First satellite observations of lower tropospheric ammonia and methanol

  3. Tropospheric Ozone Satellite Retrievals in the Pacific Northwest

    E-Print Network [OSTI]

    Collins, Gary S.

    Tropospheric Ozone Satellite Retrievals in the Pacific Northwest Jacqueline Costello1, Farren: Tropospheric ozone is difficult to retrieve from satellites because of the abundance of ozone in the stratosphere. Tropospheric ozone has become a significant environmental issue and can be exacerbated by UT

  4. Ris National Laboratory Satellite SAR applied in offshore wind

    E-Print Network [OSTI]

    Risø National Laboratory Satellite SAR applied in offshore wind ressource mapping: possibilities is to quantify the regional offshore wind climate for wind energy application based on satellite SAR ·Study of 85SAR(m/s) Hasager, Dellwik, Nielsen and Furevik, 2004, Validation of ERS-2 SAR offshore wind-speed maps

  5. Validation of satellite ozone profile retrievals using Beijing ozonesonde data

    E-Print Network [OSTI]

    Pan, Laura

    , the Atmospheric Infrared Sounder (AIRS) on the NASA Aqua satellite and the Microwave Limb Sounder (MLS in the stratosphere and troposphere. Stratospheric ozone forms a protective layer that absorbs enough solar) on the NASA Aqua satellite [Aumann et al., 2003] and the Microwave Limb Sounder (MLS) on the NASA Aura

  6. Title: Satellite Streetview: Prince Edward Island Data Creator /

    E-Print Network [OSTI]

    Title: Satellite Streetview: Prince Edward Island Data Creator / Copyright Owner: DMTI Spatial Inc: N/A Abstract: Satellite images generated for cities and/or regions in Prince Edward Island.. Areas: N/A Keywords (Place): Canada; Prince Edward Island; Charlottetown Keywords (Subject): Aerial Images

  7. Relationship between Cloud Condensation Nuclei and Satellite Retrievals of Cloud Droplet Effective Radius

    E-Print Network [OSTI]

    Delene, David J.

    ` Relationship between Cloud Condensation Nuclei and Satellite Retrievals of Cloud Droplet is the relationship between below cloud base cloud condensation nuclei (CCN) and satellite retrievals of cloud droplet cloud effective radius; however, satellites can not measure cloud condensation nuclei (CCN

  8. Symmetric Satellite Swarms and Choreographic Crystals

    E-Print Network [OSTI]

    Latham Boyle; Jun Yong Khoo; Kendrick Smith

    2014-07-22

    In this paper, we introduce a natural dynamical analogue of crystalline order, which we call choreographic order. In an ordinary (static) crystal, a high degree of symmetry may be achieved through a careful arrangement of the fundamental repeated elements. In the dynamical analogue, a high degree of symmetry may be achieved by having the fundamental elements perform a carefully choreographed dance. For starters, we show how to construct and classify all symmetric satellite constellations. Then we explain how to generalize these ideas to construct and classify choreographic crystals more broadly. We introduce a quantity, called the "choreography" of a given configuration. We discuss the possibility that some (naturally occurring or artificial) many-body or condensed-matter systems may exhibit choreographic order, and suggest natural experimental signatures that could be used to identify and characterize such systems.

  9. Laser power beaming for satellite applications

    SciTech Connect (OSTI)

    Friedman, H.W.

    1993-09-22

    A serious consideration of laser power beaming for satellite applications appears to have grown out of a NASA mission analysis for transmitting power to lunar bases during the two week dark period. System analyses showed that laser power beaming to the moon in conjunction with efficient, large area solar cell collection panels, were an attractive alternative to other schemes such as battery storage and nuclear generators, largely because of the high space transportation costs. The primary difficulty with this scheme is the need for very high average power visible lasers. One system study indicated that lasers in excess of 10 MW at a wavelength of approximately 850 nm were required. Although such lasers systems have received much attention for military applications, their realization is still a long term goal.

  10. History of NOAA Satellite Programs--Updated October 2009 Page 1 History of the NOAA Satellite Program

    E-Print Network [OSTI]

    soundings, atmospheric temperature and moisture data in all weather situations. During those 46 years, NOAA than four decades developing and applying space based Earth remote sensing for NOAA's National Weather have evolved from weather satellites to environmental satellites. Data is used for applications related

  11. History of NOAA Satellite Programs--Updated June 2011 Page 1 History of the NOAA Satellite Program

    E-Print Network [OSTI]

    soundings, atmospheric temperature and moisture data in all weather situations. During those 46 years, NOAA and applying space based Earth remote sensing for NOAA's National Weather Service (NWS) forecasts. The NWS from weather satellites to environmental satellites. Data is used for applications related

  12. Heat Transfer -1 A satellite in space orbits the sun. The satellite can be approximated as a flat plate with

    E-Print Network [OSTI]

    Virginia Tech

    Heat Transfer - 1 A satellite in space orbits the sun. The satellite can be approximated as a flat plate with dimensions and properties given below. (a) Calculate the solar heat flux (W/m2 is at a distance where the solar heat flux (as defined above) is 500 W/m2 , and the flat plate is oriented

  13. A survey of satellite galaxies around NGC 4258

    SciTech Connect (OSTI)

    Spencer, Meghin; Loebman, Sarah; Yoachim, Peter

    2014-06-20

    We conduct a survey of satellite galaxies around the nearby spiral NGC 4258 by combining spectroscopic observations from the Apache Point Observatory 3.5 m telescope with Sloan Digital Sky Survey (SDSS) spectra. New spectroscopy is obtained for 15 galaxies. Of the 47 observed objects, we categorize 8 of them as probable satellites, 8 as possible satellites, and 17 as unlikely to be satellites. We do not speculate on the membership of the remaining 14 galaxies due to a lack of velocity and distance information. Radially integrating our best-fit NFW profile for NGC 4258 yields a total mass of 1.8 × 10{sup 12} M {sub ?} within 200 kpc. We find that the angular distribution of the satellites appears to be random, and not preferentially aligned with the disk of NGC 4258. In addition, many of the probable satellite galaxies have blue u–r colors and appear to be star-forming irregulars in SDSS images; this stands in contrast to the low number of blue satellites in the Milky Way and M31 systems at comparable distances.

  14. Neural Networks Early Neural Network Modeling

    E-Print Network [OSTI]

    Yuste, Rafael

    Appendix E Neural Networks Early Neural Network Modeling Neurons Are Computational Devices A Neuron? This is the central question moti- vating the study of neural networks. In this appendix we provide a brief historical review of the field, intro- duce some key concepts, and discuss two influential models of neural networks

  15. Equatorial hydrology studies by satellite telemetry

    SciTech Connect (OSTI)

    Clegg, B.; Koranda, J.; Robison, W.; Holladay, G.

    1980-12-30

    We are using a geostationary satellite functioning as a transponder to collect surface environmental data to describe the fate of soil-borne radionuclides. The remote, former atomic testing grounds at the Enewetak and Bikini Atolls present a difficult environment in which to collect continuous field data. Our land-based, solar-powered microprocessor and environmental data systems remotely measure net and total solar radiation, rain, humidity, temperature, and soil-water potentials. For the past year, our water-flux model predicted wet season plant-transpiration rates nearly equal to the 6- to 7-mm/d evaporation-pan rate, which decreases to 2 to 3 mm/d for the dry season. From the microclimate data we estimated a 1:3 and 1:20 /sup 137/Cs dry-matter concentration ratio, which was later confirmed by radioisotopic analysis. This ratio exacerbates the dose to man from intake of food plants. Nephelometer measurements of airborne particulates presently indicate a minimum respiratory radiological dose.

  16. Aerosol Optical Depth Retrieval by Neural Networks Ensemble with Adaptive Cost Function

    E-Print Network [OSTI]

    Obradovic, Zoran

    and warming the atmosphere. Therefore, the accurate prediction of aerosols composition and their concentration (AERONET) is global remote sensing network of about 540 ground-based radiometers that retrieve AOD several as ground truth when validating retrieval quality of various satellite- based AOD retrieval algorithms [4

  17. Earthquake Damage Identification using High-Resolution Satellite

    E-Print Network [OSTI]

    Shinozuka, Masanobu

    detection ­ Change detection ­ Thematic classification · Thematic classification results · Future studies resolution panchromatic (B&W) ­ 4 m resolution multispectral (color) #12;Satellite Digital Data clouds/night ­ Radar image speckle ­ Interferometry to get digital elevation models or temporal movements

  18. Risk management of student-run small satellite programs

    E-Print Network [OSTI]

    Deems, Elizabeth (Elizabeth Carolina)

    2007-01-01

    This paper proposes an approach for failure mode identification in university-affiliated, small satellite programs. These small programs have a unique set of risks due to many factors, including a typically inexperienced ...

  19. 'Dark' Milky Way Satellite Uncovered - NERSC SCience News March...

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

    and location of both of the known satellite galaxies. When she applied this analysis to radio observations of our own Milky Way, the analysis revealed a potential dwarf galaxy,...

  20. The use of satellite-based technology in developing countries

    E-Print Network [OSTI]

    Wood, Danielle Renee

    2007-01-01

    Satellite technology in the areas of remote sensing, communication, and navigation can provide valuable information in a number of areas from business to disaster management to agriculture. There is great potential for ...

  1. RETHINKING SATELLITE BASED SOLAR IRRADIANCE MODELLING R. W. Mueller

    E-Print Network [OSTI]

    Heinemann, Detlev

    into the electricity grid, accurate solar irradiance data in a high spatial and temporal resolution are necessary. Solar irra- diance schemes provide these data using weather satellites such as METEOSAT and MSG

  2. Satellite constellation design for mid-course ballistic missile intercept

    E-Print Network [OSTI]

    Sauter, Luke Michael, 1979-

    2004-01-01

    This thesis will establish a conceptual approach to the design of constellations for satellite-based mid-course missile defense. The ballistic missile intercept problem leads to a new paradigm of coverage where interceptor ...

  3. Aerospace Power & Electronics Simulation Workshop 2004 Satellite Attitude Control

    E-Print Network [OSTI]

    Simon, Dan

    Aerospace Power & Electronics Simulation Workshop 2004 · Satellite Attitude Control System Design Using Reaction Wheels Bhanu Gouda Brian Fast Dan Simon #12;2Aerospace Power & Electronics Simulation;3Aerospace Power & Electronics Simulation Workshop 2004 ADCS ·ADCS: Attitude Determination and Control

  4. On the use of Satellite Television in High Energy Physics

    E-Print Network [OSTI]

    Lucas Taylor; David O. Williams

    1998-10-24

    This paper assesses the feasibility of exploiting commercial satellite television technologies to broadcast video signals and data from major High Energy Physics facilities to collaborating institutes throughout the world.

  5. Plasma-satellite interaction driven magnetic field perturbations

    SciTech Connect (OSTI)

    Saeed-ur-Rehman, E-mail: surehman@ualberta.ca [Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1 (Canada); Theoretical Physics Division, PINSTECH, Nilore Islamabad 44000 (Pakistan); Marchand, Richard, E-mail: Richard.Marchand@ualberta.ca [Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1 (Canada)

    2014-09-15

    We report the first fully kinetic quantitative estimate of magnetic field perturbations caused by the interaction of a spacecraft with space environment. Such perturbations could affect measurements of geophysical magnetic fields made with very sensitive magnetometers on-board satellites. Our approach is illustrated with a calculation of perturbed magnetic fields near the recently launched Swarm satellites. In this case, magnetic field perturbations do not exceed 20 pT, and they are below the sensitivity threshold of the on-board magnetometers. Anticipating future missions in which satellites and instruments would be subject to more intense solar UV radiation, however, it appears that magnetic field perturbations associated with satellite interaction with space environment, might approach or exceed instruments' sensitivity thresholds.

  6. HTTPEP: a HTTP Performance Enhancing Proxy for Satellite Systems

    E-Print Network [OSTI]

    Sreenan, Cormac J.

    , Cork, Ireland. p.davern@cs.ucc.ie Ahmed Zahran1 , Department of Electronics and Electrical Communications, Cairo University, Cairo, Egypt. azahran@eecu.cu.edu.eg Broadband satellites enable Internet

  7. Magnetic attitude control for satellites Jan Tommy Gravdahl,

    E-Print Network [OSTI]

    Gravdahl, Jan Tommy

    Magnetic attitude control for satellites Jan Tommy Gravdahl, Department of Engineering Cybernetics Norwegian University of Science and Technology N-7491 TRONDHEIM, Norway Abstract-- In this paper College, Norwegian University of Science and Technology (NTNU), Agricultural University of Norway

  8. A small satellite preliminary thermal control and heat shield analysis

    E-Print Network [OSTI]

    Melani Barreiro, Diego A

    2008-01-01

    As part of a student owned small satellite project, a preliminary thermal control and heat shield analysis was developed to verify acceptable performance requirements for the system. For the thermal control section, the ...

  9. Gamma-ray burst data from DMSP satellites

    SciTech Connect (OSTI)

    Terrell, J.; Klebesadel, R.W.; Lee, P. ); Griffee, J.W. )

    1991-01-01

    A number of gamma-ray bursts have been detected by means of gamma-ray detectors aboard three Air Force Defense Meteorological Satellite Program (DMSP) satellites, in polar orbits at 800 km altitude. The gamma-ray data have a 2-second resolving time, and are usually telemetered in 5 energy bins in the range 50--1000 keV. Although it is not possible to detect gamma-ray bursts when the DMSP satellites are passing through the radiation belt or the South Atlantic Anomaly, or when the source is obscured by the Earth, a number of gamma-ray bursts have been detected by two or even three of the satellites. The DMSP data may be of considerable, assistance in evaluating time histories, locations, and spectra of gamma-ray bursts.

  10. Gamma-ray burst data from DMSP satellites

    SciTech Connect (OSTI)

    Terrell, J.; Klebesadel, R.W.; Lee, P.; Griffee, J.W.

    1991-12-31

    A number of gamma-ray bursts have been detected by means of gamma-ray detectors aboard three Air Force Defense Meteorological Satellite Program (DMSP) satellites, in polar orbits at 800 km altitude. The gamma-ray data have a 2-second resolving time, and are usually telemetered in 5 energy bins in the range 50--1000 keV. Although it is not possible to detect gamma-ray bursts when the DMSP satellites are passing through the radiation belt or the South Atlantic Anomaly, or when the source is obscured by the Earth, a number of gamma-ray bursts have been detected by two or even three of the satellites. The DMSP data may be of considerable, assistance in evaluating time histories, locations, and spectra of gamma-ray bursts.

  11. Determination of wind from Nimbus-6 satellite sounding data 

    E-Print Network [OSTI]

    Carle, William Everett

    1979-01-01

    DETERMINATION OF WIND FROM NIMBUS-6 SATELLITE SOUNDING DATA A Thesis by WILLIAM EVERETT CARLE Submitted to the Graduate College of Texas A&M University in partial fulfil!. ment of the requirement for the deg. . ec of MASTER OF SCIENCE... December 1979 Major Subject: Meteorology DETEIQ&INATION OE WIND PROS1 NINEDS-6 SATELLITE SOUNDING DATA A Thesis WILLIA11 EVERETT CARLE Aporoved as to style and content by: (Chairman of Commi tee) Nember) (Head of Department) December 1979...

  12. Satellite-viewed cloud signatures associated with extratropical cyclogenesis 

    E-Print Network [OSTI]

    Lapierre, Robert Lucien

    1973-01-01

    SATELLITE-VIEWED CLOUD SIGNATURES ASSOCIATED WITH EXTRATROPICAL CYCLOGENESIS A Thesis by ROBERT LUCIEN LAPIERRE Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1973 Major Subject: Meteorology SATELLITE-VIENED CLOUD SIGNATURES ASSOCIATED WITH EXTRATROPICAL CYCLOGENESIS A Thesis by ROBERT LUCIEN LAPIERRE Appi"o ed as to st~le and content by: n llcgrceo~& (C ai rman of Conmi t te~ YemberI Hay...

  13. A mathematical simulation of earth satellite explosion debris orbital elements 

    E-Print Network [OSTI]

    Mabrey, Wayne Edward

    1970-01-01

    A MATHEMATICAL SIKJLATION OF EARTH SATELLITE EXPLOSION DEBRIS ORBITAI ELEMENTS A Thesis WAYNE EDWARD NABREY Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of NASTER OF SCIENCE... Nay 1970 Major Subject Nathematics A MATHEMATICAL SlmZATION OZ EARTH SATELLITE EXPLOSION DEBRIS ORBITAL ELEMENTS A Thesis WAI? EDWARD MABREY Approved as to style and content by: haxrman o ommi tee Head o epartment mber Member May 1...

  14. Accurate, practical simulation of satellite infrared radiometer spectral data

    SciTech Connect (OSTI)

    Sullivan, T.J.

    1982-09-01

    This study's purpose is to determine whether a relatively simple random band model formulation of atmospheric radiation transfer in the infrared region can provide valid simulations of narrow interval satellite-borne infrared sounder system data. Detailed ozonesondes provide the pertinent atmospheric information and sets of calibrated satellite measurements provide the validation. High resolution line-by-line model calculations are included to complete the evaluation.

  15. THE MASSIVE SATELLITE POPULATION OF MILKY-WAY-SIZED GALAXIES

    SciTech Connect (OSTI)

    Rodriguez-Puebla, Aldo; Avila-Reese, Vladimir; Drory, Niv, E-mail: apuebla@astro.unam.mx [Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, A. P. 70-264, 04510 Mexico, DF (Mexico)

    2013-08-20

    Several occupational distributions for satellite galaxies more massive than m{sub *} Almost-Equal-To 4 Multiplication-Sign 10{sup 7} M{sub Sun} around Milky-Way (MW)-sized hosts are presented and used to predict the internal dynamics of these satellites as a function of m{sub *}. For the analysis, a large galaxy group mock catalog is constructed on the basis of (sub)halo-to-stellar mass relations fully constrained with currently available observations, namely the galaxy stellar mass function decomposed into centrals and satellites, and the two-point correlation functions at different masses. We find that 6.6% of MW-sized galaxies host two satellites in the mass range of the Small and Large Magellanic Clouds (SMC and LMC, respectively). The probabilities of the MW-sized galaxies having one satellite equal to or larger than the LMC, two satellites equal to or larger than the SMC, or three satellites equal to or larger than Sagittarius (Sgr) are Almost-Equal-To 0.26, 0.14, and 0.14, respectively. The cumulative satellite mass function of the MW, N{sub s} ({>=}m{sub *}) , down to the mass of the Fornax dwarf is within the 1{sigma} distribution of all the MW-sized galaxies. We find that MW-sized hosts with three satellites more massive than Sgr (as the MW) are among the most common cases. However, the most and second most massive satellites in these systems are smaller than the LMC and SMC by roughly 0.7 and 0.8 dex, respectively. We conclude that the distribution N{sub s} ({>=}m{sub *}) for MW-sized galaxies is quite broad, the particular case of the MW being of low frequency but not an outlier. The halo mass of MW-sized galaxies correlates only weakly with N{sub s} ({>=}m{sub *}). Then, it is not possible to accurately determine the MW halo mass by means of its N{sub s} ({>=}m{sub *}); from our catalog, we constrain a lower limit of 1.38 Multiplication-Sign 10{sup 12} M{sub Sun} at the 1{sigma} level. Our analysis strongly suggests that the abundance of massive subhalos should agree with the abundance of massive satellites in all MW-sized hosts, i.e., there is not a missing (massive) satellite problem for the {Lambda}CDM cosmology. However, we confirm that the maximum circular velocity, v{sub max}, of the subhalos of satellites smaller than m{sub *} {approx} 10{sup 8} M{sub Sun} is systematically larger than the v{sub max} inferred from current observational studies of the MW bright dwarf satellites; different from previous works, this conclusion is based on an analysis of the overall population of MW-sized galaxies. Some pieces of evidence suggest that the issue could refer only to satellite dwarfs but not to central dwarfs, then environmental processes associated with dwarfs inside host halos combined with supernova-driven core expansion should be on the basis of the lowering of v{sub max}.

  16. Consistent satellite XCO2 retrievals from SCIAMACHY and GOSAT using the BESD algorithm

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

    Heymann, J.; Reuter, M.; Hilker, M.; Buchwitz, M.; Schneising, O.; Bovensmann, H.; Burrows, J. P.; Kuze, A.; Suto, H.; Deutscher, N. M.; et al

    2015-02-13

    Consistent and accurate long-term data sets of global atmospheric concentrations of carbon dioxide (CO2) are required for carbon cycle and climate related research. However, global data sets based on satellite observations may suffer from inconsistencies originating from the use of products derived from different satellites as needed to cover a long enough time period. One reason for inconsistencies can be the use of different retrieval algorithms. We address this potential issue by applying the same algorithm, the Bremen Optimal Estimation DOAS (BESD) algorithm, to different satellite instruments, SCIAMACHY on-board ENVISAT (March 2002–April 2012) and TANSO-FTS on-board GOSAT (launched in Januarymore »2009), to retrieve XCO2, the column-averaged dry-air mole fraction of CO2. BESD has been initially developed for SCIAMACHY XCO2 retrievals. Here, we present the first detailed assessment of the new GOSAT BESD XCO2 product. GOSAT BESD XCO2 is a product generated and delivered to the MACC project for assimilation into ECMWF's Integrated Forecasting System (IFS). We describe the modifications of the BESD algorithm needed in order to retrieve XCO2 from GOSAT and present detailed comparisons with ground-based observations of XCO2 from the Total Carbon Column Observing Network (TCCON). We discuss detailed comparison results between all three XCO2 data sets (SCIAMACHY, GOSAT and TCCON). The comparison results demonstrate the good consistency between the SCIAMACHY and the GOSAT XCO2. For example, we found a mean difference for daily averages of ?0.60 ± 1.56 ppm (mean difference ± standard deviation) for GOSAT-SCIAMACHY (linear correlation coefficient r = 0.82), ?0.34 ± 1.37 ppm (r = 0.86) for GOSAT-TCCON and 0.10 ± 1.79 ppm (r = 0.75) for SCIAMACHY-TCCON. The remaining differences between GOSAT and SCIAMACHY are likely due to non-perfect collocation (±2 h, 10° × 10° around TCCON sites), i.e., the observed air masses are not exactly identical, but likely also due to a still non-perfect BESD retrieval algorithm, which will be continuously improved in the future. Our overarching goal is to generate a satellite-derived XCO2 data set appropriate for climate and carbon cycle research covering the longest possible time period. We therefore also plan to extend the existing SCIAMACHY and GOSAT data set discussed here by using also data from other missions (e.g., OCO-2, GOSAT-2, CarbonSat) in the future.« less

  17. Network Monitoring in Multicast Networks Using Network Coding

    E-Print Network [OSTI]

    Ho, Tracey

    , and give some experimental results for one and two link failures in randomly generated networks. We also inference of possible locations of link failures or losses in a network. For distributed randomized network coding, we bound the probability of being able to distinguish among a given set of failure events

  18. The Network

    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.Theory ofDidDevelopment TopMetathesisSediments and RelatedProject HomeNetwork

  19. Introduction to Network Analysis 1 Introduction to Network Analysis

    E-Print Network [OSTI]

    Safro, Ilya

    Networks from networksandservers.blogspot.com #12;Introduction to Network Analysis 7 Natural gas major

  20. Network coding for robust wireless networks

    E-Print Network [OSTI]

    Kim, MinJi, Ph. D. Massachusetts Institute of Technology

    2012-01-01

    Wireless networks and communications promise to allow improved access to services and information, ubiquitous connectivity, and mobility. However, current wireless networks are not well-equipped to meet the high bandwidth ...

  1. Energy aware network coding in wireless networks

    E-Print Network [OSTI]

    Shi, Xiaomeng, Ph. D. Massachusetts Institute of Technology

    2012-01-01

    Energy is one of the most important considerations in designing reliable low-power wireless communication networks. We focus on the problem of energy aware network coding. In particular, we investigate practical energy ...

  2. Efficient network camouflaging in wireless networks 

    E-Print Network [OSTI]

    Jiang, Shu

    2006-04-12

    (e.g. broadcast, node mobility) that traditional wired networks do not possess. This necessitates developing new techniques that take account of properties of wireless networks and are able to achieve a good balance between performance and security...

  3. Cooperative Wireless Network Behnaam Aazhang

    E-Print Network [OSTI]

    Aazhang, Behnaam

    Cooperative Wireless Network Behnaam Aazhang #12;Cooperative Wireless Network Behnaam Aazhang Sabharwal #12;Wireless Network · Infrastructure · Ad hoc · Mesh network #12;Engineering Wireless Network · Wireless links ­ Per link design #12;Single Wireless Link · Additive Gaussian Channels ­ Achievable rate

  4. A Baryonic Solution to the Missing Satellites Problem

    SciTech Connect (OSTI)

    Brooks, Alyson M.; Kuhlen, Michael; Zolotov, Adi; Hooper, Dan

    2013-03-01

    It has been demonstrated that the inclusion of baryonic physics can alter the dark matter densities in the centers of low-mass galaxies, making the central dark matter slope more shallow than predicted in pure cold dark matter simulations. This flattening of the dark matter profile can occur in the most luminous subhalos around Milky Way mass galaxies. Zolotov et al. have suggested a correction to be applied to the central masses of dark matter-only satellites in order to mimic the affect of (1) the flattening of the dark matter cusp due to supernova feedback in luminous satellites and (2) enhanced tidal stripping due to the presence of a baryonic disk. In this paper, we apply this correction to the z = 0 subhalo masses from the high resolution, dark matter-only Via Lactea II (VL2) simulation, and find that the number of massive subhalos is dramatically reduced. After adopting a stellar mass to halo mass relationship for the VL2 halos, and identifying subhalos that are (1) likely to be destroyed by stripping and (2) likely to have star formation suppressed by photo-heating, we find that the number of massive, luminous satellites around a Milky Way mass galaxy is in agreement with the number of observed satellites around the Milky Way or M31. We conclude that baryonic processes have the potential to solve the missing satellites problem

  5. Interconnection networks

    DOE Patents [OSTI]

    Faber, V.; Moore, J.W.

    1988-06-20

    A network of interconnected processors is formed from a vertex symmetric graph selected from graphs GAMMA/sub d/(k) with degree d, diameter k, and (d + 1)exclamation/ (d /minus/ k + 1)exclamation processors for each d greater than or equal to k and GAMMA/sub d/(k, /minus/1) with degree d /minus/ 1, diameter k + 1, and (d + 1)exclamation/(d /minus/ k + 1)exclamation processors for each d greater than or equal to k greater than or equal to 4. Each processor has an address formed by one of the permutations from a predetermined sequence of letters chosen a selected number of letters at a time, and an extended address formed by appending to the address the remaining ones of the predetermined sequence of letters. A plurality of transmission channels is provided from each of the processors, where each processor has one less channel than the selected number of letters forming the sequence. Where a network GAMMA/sub d/(k, /minus/1) is provided, no processor has a channel connected to form an edge in a direction delta/sub 1/. Each of the channels has an identification number selected from the sequence of letters and connected from a first processor having a first extended address to a second processor having a second address formed from a second extended address defined by moving to the front of the first extended address the letter found in the position within the first extended address defined by the channel identification number. The second address is then formed by selecting the first elements of the second extended address corresponding to the selected number used to form the address permutations. 9 figs.

  6. Financial Networks Anna Nagurney

    E-Print Network [OSTI]

    Nagurney, Anna

    Freight Network World Oil Routes Natural Gas Flows Network Systems Internet Traffic Anna Nagurney in decision-making; constraints on resources: human, financial, natural, time, etc.; global reach of many of Networks Today large-scale nature and complexity of network topology; congestion, which leads

  7. Satellite remote sensing of global rainfall using passive microwave radiometry

    SciTech Connect (OSTI)

    Ferriday, J.G.

    1994-12-31

    Global rainfall over land and ocean is estimated using measurements of upwelling microwaves by a satellite passive microwave radiometer. Radiative transfer calculations through a cloud model are used to parameterize an inversion technique for retrieving rain rates from brightness temperatures measured by the Special Sensor Microwave Imager (SSM/I). The rainfall retrieval technique is based on the interaction between multi-spectral microwave radiances and millimeter sized liquid and frozen hydrometeors distributed in the satellite`s field of view. The rain rate algorithm is sensitive to both hydrometeor emission and scattering while being relatively insensitive to extraneous atmospheric and surface effects. Separate formulations are used over ocean and land to account for different background microwave characteristics and the algorithm corrects for inhomogeneous distributions of rain rates within the satellite`s field of view. Estimates of instantaneous and climate scale rainfall are validated through comparisons with modeled clouds, surface radars, rain gauges and alternative satellite estimates. The accuracy of the rainfall estimates is determined from a combination of validation comparisons, theoretical sampling error calculations, and modeled sensitivity to variations in atmospheric and surface radiative properties. An error budget is constructed for both instantaneous rain rates and climate scale global estimates. At a one degree resolution, the root mean square errors in instantaneous rain rate estimates are 13% over ocean and 20% over land. The root mean square errors in global rainfall totals over a four month period are found to be 46% over ocean and 63% over land. Global rainfall totals are computed on a monthly scale for a three year period from 1987 to 1990. The time series is analyzed for climate scale rainfall distribution and variability.

  8. Deriving Atmospheric Density Estimates Using Satellite Precision Orbit Ephemerides

    E-Print Network [OSTI]

    Hiatt, Andrew Timothy

    2009-01-01

    due to atmospheric drag m/s2 ap geomagnetic 3-hourly planetary equivalent amplitude index gamma, Telsa, or kg s m-1 A satellite cross-sectional area m2 Ap geomagnetic daily planetary amplitude index gamma, Telsa, or kg s m-1 B B? estimated... due to atmospheric drag m/s2 ap geomagnetic 3-hourly planetary equivalent amplitude index gamma, Telsa, or kg s m-1 A satellite cross-sectional area m2 Ap geomagnetic daily planetary amplitude index gamma, Telsa, or kg s m-1 B B? estimated...

  9. The Human Capital Ecosystem Underlying the PLA’s Network Weapons Development

    E-Print Network [OSTI]

    McREYNOLDS, Joe; RAGLAND, Leigh A.; CHANG, Amy

    2015-01-01

    pri- vate-sector information security and computer sciencein the IT and information security sectors. The scope ofwhite-hat Chinese information security researchers have said

  10. American Institute of Aeronautics and Astronautics Stationkeeping of a Flux-Pinned Satellite Network

    E-Print Network [OSTI]

    Peck, Mason A.

    --whether achieved by permanent magnets or electromagnets-- cannot be described as passively stable. As a consequence by depending instead upon force generated on a magnet by a nearby superconductor that resists changes of formations by using the Lorentz force on a charged object in orbit around a planet with a magnetic field

  11. Southwestern Ontario Medical Education Network Southwestern Ontario Medical Education Network

    E-Print Network [OSTI]

    Lennard, William N.

    Southwestern Ontario Medical Education Network SWOMEN Southwestern Ontario Medical Education Network SWOMEN Contact: Charlotte Sikatori, Southwestern Ontario Medical Education Network (SWOMEN

  12. Synchronization of system-of-systems interfaces in military satellite communications

    E-Print Network [OSTI]

    Davis, Mark J. (Mark Jeffrey)

    2008-01-01

    Military systems continue to become more complex and nearly all are now part of one or more system of systems (SoS). Military satellite communications programs have expanded over the last decade from three distinct satellite ...

  13. Aerosol-cloud radiative effects from passive satellite instruments Mar%n de Graaf

    E-Print Network [OSTI]

    Graaf, Martin de

    Satellite measurements of absorbing aerosols Reflectance Difference Method Cloud modelling Results Outlook Aerosol-Radiation Interac. Aerosol-Cloud Interac. Total anthropogenic Solar irradiance #12;Absorbing aerosols: SCIAMACHY Results Outlook #12;SCIAMACHY on ESA's Environmetal Satellite: ENVISAT Polar orbi

  14. Science Background for the Reprocessing and Goddard Satellite-based Surface Turbulent Fluxes

    E-Print Network [OSTI]

    1 Science Background for the Reprocessing and Goddard Satellite-based Surface Turbulent Fluxes, MD 20771 USA #12;2 Science Background for the Reprocessing and Goddard Satellite-based Surface

  15. Sea Oil Field Satellite Monitoring: An Opera3onal View

    E-Print Network [OSTI]

    Kuligowski, Bob

    :on alone contains 54% of the sea's oil reserves and 45% of its gasSea Oil Field Satellite Monitoring: An Opera3onal View Maurizio, Camp Springs, MD 20746 #12;Outline Introduc:on Sea oil fields Synthe:c Aperture

  16. Satellite measurements of the clear-sky greenhouse effect from

    E-Print Network [OSTI]

    LETTERS Satellite measurements of the clear-sky greenhouse effect from tropospheric ozone HELEN M of longer-lived greenhouse gases such as carbon dioxide. Here, we analyse spectrally resolved measurements of 0.48±0.14 W m-2 between 45 S and 45 N. This estimate of the clear-sky greenhouse effect from

  17. Because of its excellence in satellite-based research,

    E-Print Network [OSTI]

    Kurapov, Alexander

    winds, which show their mixing power and driving force for ocean currents, as well as the strength heights, which show currents in the upper ocean, along with significant wave heights. · MicrowaveStudying the Ocean from Space Because of its excellence in satellite-based research, the College

  18. AEROSOL ABSORPTION IN CLOUDY SCENES USING PASSIVE SATELLITE INSTRUMENTS

    E-Print Network [OSTI]

    Graaf, Martin de

    AEROSOL ABSORPTION IN CLOUDY SCENES USING PASSIVE SATELLITE INSTRUMENTS M. de Graaf, L.G. Tilstra information has become available from active space-based sensors and some dedicated field campaigns on aerosol-absorption, is the Absorbing Aerosol Index (AAI), which can indicate absorbing aerosols overlying clouds. The AAI is available

  19. Using satellite data for mapping offshore wind resources and wakes

    E-Print Network [OSTI]

    (no wind) Horns Rev Offshore Wind Farm Blaavandshuk Met. mast N #12;Wind Horns Rev Wind speed map from · Wake near large offshore wind farms is quantified in space and time · Software for usersUsing satellite data for mapping offshore wind resources and wakes Charlotte Bay Hasager, Merete

  20. Tropospheric carbon monoxide: satellite observations and their applications 

    E-Print Network [OSTI]

    MacCallum, Stuart Neil

    2008-01-01

    of greenhouse gases such as CH4 and O3. Consequently, CO has an atmospheric lifetime of 1-3 months, making it a good tracer for studying the long range transport of pollution. Satellite observations present a valuable tool to investigate tropospheric CO...

  1. A Review of Impending Small Satellite Formation Flying Missions

    E-Print Network [OSTI]

    Chung, Soon-Jo

    A Review of Impending Small Satellite Formation Flying Missions Saptarshi Bandyopadhyay , Giri P. Subramanian , Rebecca Foust , Daniel Morgan§ , Soon-Jo Chung¶ , University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA and Fred Y. Hadaegh Jet Propulsion Laboratory, California Institute

  2. The mass dependence of dwarf satellite galaxy quenching

    SciTech Connect (OSTI)

    Slater, Colin T.; Bell, Eric F. E-mail: ericbell@umich.edu

    2014-09-10

    We combine observations of the Local Group with data from the NASA-Sloan Atlas to show the variation in the quenched fraction of satellite galaxies from low-mass dwarf spheroidals and dwarf irregulars to more massive dwarfs similar to the Magellanic Clouds. While almost all of the low-mass (M {sub *} ? 10{sup 7} M {sub ?}) dwarfs are quenched, at higher masses the quenched fraction decreases to approximately 40%-50%. This change in the quenched fraction is large and suggests a sudden change in the effectiveness of quenching that correlates with satellite mass. We combine this observation with models of satellite infall and ram pressure stripping to show that the low-mass satellites must quench within 1-2 Gyr of pericenter passage to maintain a high quenched fraction, but that many more massive dwarfs must continue to form stars today even though they likely fell into their host >5 Gyr ago. We also characterize how the susceptibility of dwarfs to ram pressure must vary as a function of mass if it is to account for the change in quenched fractions. Though neither model predicts the quenching effectiveness a priori, this modeling illustrates the physical requirements that the observed quenched fractions place on possible quenching mechanisms.

  3. 50 Years of Treaty Verification from Space Operational Satellite

    E-Print Network [OSTI]

    of the universe. The Vela satellites discovered bursts of gamma- ray energy emanating from beyond the solar system gamma-ray burst measured with Vela (Credit: R. Klebesadel, I. Strong & R. Olson (LANL) NASA Swift Spacecraft devoted to the study of cosmic gamma-ray bursts (Credit: NASA/GSFC) The U.S. Nuclear Detonation

  4. Annual AIAA/USU Conference on Small Satellites

    E-Print Network [OSTI]

    Simon, Dan

    Charge Optimization of Lithium-Ion Batteries in Small Satellites Saurabh Jain, Dan Simon Department and batteries at the same time. To overcome these problems we have developed and adopted a power management involves scheduling of loads (various subsystem operations, payload experimentation, battery charging, etc

  5. A spectral comparison of (379) Huenna and its satellite

    E-Print Network [OSTI]

    DeMeo, Francesca E.

    We present near-infrared spectral measurements of Themis family Asteroid (379) Huenna (D ? 98 km) and its 6 km satellite using SpeX on the NASA IRTF. The companion was farther than 1.5? from the primary at the time of ...

  6. Fifth Annual RECOMB Satellite Workshop on Comparative Genomics

    E-Print Network [OSTI]

    Fainman, Yeshaiahu

    Fifth Annual RECOMB Satellite Workshop on Comparative Genomics September 16-18, 2007 First RECOMB Oliver A. Ryder (Zoological Society of San Diego) Genomics and Bioinformatics: Applications) Accelerated and Biased Nucleotide Evolution in the Human Genome Rick Wilson (Washington University, St. Louis

  7. Cognitive Vision for Autonomous Satellite Rendezvous and Docking

    E-Print Network [OSTI]

    Terzopoulos, Demetri

    with the challenge of effec- tively combining low-level vision with artificial intelli- gence. Some of the earliestCognitive Vision for Autonomous Satellite Rendezvous and Docking Faisal Z. Qureshi and Demetri MDRobotics Limited, Brampton, ON L6S 4J3, Canada Abstract We present a cognitively-controlled vision system

  8. RNS Implementation of High Performance Filters for Satellite Demultiplexing

    E-Print Network [OSTI]

    Nannarelli, Alberto

    RNS Implementation of High Performance Filters for Satellite Demultiplexing G.C. Cardarilli, A. Del we present a Residue Number System (RNS) implementation of digital filters to be used for space applications. The RNS is particularly attractive because of the reduced power dissipation with respect

  9. AIAA 2004-3150 ARCHITECTING A COMMUNICATION SATELLITE PRODUCT LINE

    E-Print Network [OSTI]

    de Weck, Olivier L.

    ABSTRACT Current unfavorable market conditions have shifted the preference of commercial communication cycles, and reduce market risk by catering to a number of market segments. This paper formulates of commercial communication satellites. NOMENCLATURE SAA solar array area radiatorA thermal radiator area c

  10. Distributed Load-Aware Routing in LEO Satellite Evangelos Papapetrou

    E-Print Network [OSTI]

    Papapetrou, Evaggelos

    with terrestrial infrastructure. However, over the last years the interest in LEO systems has been renewed algorithm to compute the optimal path for any pair of satellites. In the case of traffic adaptive routing. This reduces the ability of the algorithm to adapt to traffic. Furthermore, the proposed algorithm

  11. Satellite and Radar Meteorology Dr. Oleksandr Karabanov (Aleks)

    E-Print Network [OSTI]

    Black, Robert X.

    Scattering; Clouds; Reflection; Solar radiation Thursday, November 01, 2012 21 Geostationary satellites using these data #12;Syllabus Date Class # Class topic (tentative) Tuesday, August 21, 2012 1 Tuesday, August 28, 2012 3 Electromagnetic radiation Thursday, August 30, 2012 4 Propagation of EM waves

  12. Ionization satellites of the ArHe dimer

    SciTech Connect (OSTI)

    Miteva, Tsveta; Klaiman, Shachar; Gokhberg, Kirill [Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg (Germany); Gromov, Evgeniy V., E-mail: Evgeniy.Gromov@pci.uni-heidelberg.de [Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg (Germany); Laboratory of Quantum Chemistry, Computer Center, Irkutsk State University, K. Marks 1, 664003 Irkutsk (Russian Federation)

    2014-05-28

    Ionization satellites are key ingredients in the control of post ionization processes such as molecular dissociation and interatomic Coulombic decay. Here, using the high-level ab initio method of multi-reference configuration interaction up to triple excitations, we study the potential energy curves (PECs) of the ionization satellites of the ArHe dimer. With this model system, we demonstrate that the simple model used in alkaline earth metal and rare gas complexes to describe the satellites as a Rydberg electron moving on top of a dicationic core does not fully hold for the rare gas clusters. The more complex valence structure in the rare gas atom leads to the mixing of different electronic configurations of the dimer. This prevents one from assigning a single dicationic parent state to some of the ionization satellites. We further analyze the structure of the different PECs, demonstrating how the density of the Rydberg electron is reflected in the structure of the PEC wherever the simple model is applicable.

  13. Use of Visible Geostationary Operational Meteorological Satellite Imagery in

    E-Print Network [OSTI]

    is typically computed at specific locations based on weather station data. Estimates of incoming solar radiation (insolation, or Rs) have been made from geostationary satellite data over a 14-year period (1 June must be included in many hydrologic models. As actual ET (AET) data are often lacking, ET is usually

  14. X-ray line polarization spectroscopy of Li-like satellite line...

    Office of Scientific and Technical Information (OSTI)

    United States Language: English Subject: 74; ANISOTROPY; DISTRIBUTION FUNCTIONS; ELECTRONS; KINETICS; LASERS; PLASMA; POLARIZATION; PULSES; SATELLITES; SPECTRA; SPECTROSCOPY...

  15. As reprinted from InternationalJournal of Satellite Communications, Vol. 8, 79-93 (1990) Helmut Eyssele and Heinz Gockler

    E-Print Network [OSTI]

    Göckler, Heinz G.

    1990-01-01

    FOR MOBILE SCPC SATELLITE COMMUNICATIONS HELMUT EYSSELE A N D HEINZ GOCKLER ANT Ncrclrr dernultiplexer Sini~rlation Hierarchical niultistage method Tree structure SCPC satellite com

  16. When Network Coding improves the Performances of Clustered Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    When Network Coding improves the Performances of Clustered Wireless Networks that significantly increases the performances of clustering algorithms in wireless multi-hop networks-XOR coding; wireless multi-hop networks; clustering I. INTRODUCTION Partitioning nodes

  17. FPGA Implementation of a Satellite Attitude Control using Variable Structure Control

    E-Print Network [OSTI]

    Aboelaze, Mokhtar

    is assumed to control the satellite position and attitude with minimum interfering from ground control the weight and power consumption of the satellite. Failure to properly control the satellite can lead to disastrous results. NASA's earth orbiting Lewis Spacecraft lost contact with ground control within few days

  18. Using Outage History to Exclude High-Risk Satellites from GBAS Corrections

    E-Print Network [OSTI]

    Stanford University

    Using Outage History to Exclude High-Risk Satellites from GBAS Corrections SAM PULLEN and PER ENGE constellation are not expected to violate this assumption. A study of unscheduled GPS satellite outages from. In addition, satellites that have recently experienced unscheduled outages are more likely to suffer

  19. P5.60B DERIVATION OF DAYLIGHT AND SOLAR IRRADIANCE DATA FROM SATELLITE OBSERVATIONS

    E-Print Network [OSTI]

    Heinemann, Detlev

    P5.60B DERIVATION OF DAYLIGHT AND SOLAR IRRADIANCE DATA FROM SATELLITE OBSERVATIONS A. Hammer, D of the downward surface shortwave irradiance from satellite observations has been subject to numerous project SATELLIGHT an attempt is made to use satellite methods to derive daylight and solar irradiance

  20. SOLAR COOKER UTILIZING SATELLITE DISH TECHNOLOGY Mechanical Engineering Department , Philadelphia University, Amman Jordan, e-mail

    E-Print Network [OSTI]

    SOLAR COOKER UTILIZING SATELLITE DISH TECHNOLOGY A. Saleh1 A. Badran2 1 Mechanical Engineering dish­type solar cooker was built and tested utilizing satellite dish technology. A common satellite-TV dish was utilized as a solar cooker after covering it with a highly­reflective aluminum foil, which

  1. Bias reduction in the Sea Surface Temperature (SST) forecasts based on GOES satellite data

    E-Print Network [OSTI]

    Kurapov, Alexander

    Bias reduction in the Sea Surface Temperature (SST) forecasts based on GOES satellite data Based on comparisons with infrared (GOES) and microwave (AMSE-R) satellite data, our coastal ocean forecast model set circulation model and satellite data helps to improve forecasting of ocean conditions (esp. currents and SST

  2. Satellite Remote Sensing and GIS -FS 2013 The aims of this course are threefold

    E-Print Network [OSTI]

    Giger, Christine

    Programme Satellite Remote Sensing and GIS - FS 2013 Aims The aims of this course are threefold of satellite remote sensing, often in relation to GIS, in different disciplines with invited speakers from about what is happening with satellite remote sensing in Switzerland and how it works in professional

  3. Satellite remote sensing of surface air quality Randall V. Martin a,b,*

    E-Print Network [OSTI]

    Martin, Randall

    Review Satellite remote sensing of surface air quality Randall V. Martin a,b,* a Department 2007 Received in revised form 26 June 2008 Accepted 2 July 2008 Keywords: Remote sensing Air quality Satellite Pollution Emissions a b s t r a c t Satellite remote sensing of air quality has evolved

  4. Satellite Remote Sensing and GIS -FS 2011 The aims of this course are threefold

    E-Print Network [OSTI]

    Giger, Christine

    Programme Satellite Remote Sensing and GIS - FS 2011 Aims The aims of this course are threefold of satellite remote sensing, often in relation to GIS, in different disciplines with invited speakers from about what is happening with satellite remote sensing in Switzerland and how it works in professional

  5. Satellite Remote Sensing and GIS -FS 2012 The aims of this course are threefold

    E-Print Network [OSTI]

    Giger, Christine

    Programme Satellite Remote Sensing and GIS - FS 2012 Aims The aims of this course are threefold of satellite remote sensing, often in relation to GIS, in different disciplines with invited speakers from about what is happening with satellite remote sensing in Switzerland and how it works in professional

  6. Capabilities of satellite precipitation datasets to estimate heavy precipitation rates at different temporal accumulations

    E-Print Network [OSTI]

    AghaKouchak, Amir

    Capabilities of satellite precipitation datasets to estimate heavy precipitation rates at different as alternative sources of precipitation information has been argued in numerous studies. Future developments in satellite precipitation algorithms as well as utilization of satellite data in operational applications rely

  7. Vulnerability Analysis of Complex Networks from Transportation Networks to

    E-Print Network [OSTI]

    Nagurney, Anna

    ;Natural Gas Pipeline Network in the US #12;World Oil Trading Network #12;The study of the efficient

  8. Comparison between Traditional Neural Networks and Radial Basis Function Networks

    E-Print Network [OSTI]

    Wilamowski, Bogdan Maciej

    Comparison between Traditional Neural Networks and Radial Basis Function Networks Tiantian Xie, Hao networks: traditional neural networks and radial basis function (RBF) networks, both of which of neural network architectures are analyzed and compared based on four different examples. The comparison

  9. Cooperation Incentives for Wireless Networks

    E-Print Network [OSTI]

    Wu, Chuchu

    2015-01-01

    incentives in multi-hop wireless networks. ” In INFOCOM,for offloading traffic from LTE network to wireless peer-to-reputation sys- tem for wireless mesh networks using network

  10. High Performance Datacenter Networks

    E-Print Network [OSTI]

    Cortes, Corinna

    High Performance Datacenter Networks Architectures, Algorithms, and Opportunities #12;Synthesis architecture conferences, such as ISCA, HPCA, MICRO, and ASPLOS. High Performance Datacenter Networks Computer Architecture Daniel J. Sorin 2009 The Datacenter as a Computer: An Introduction to the Design

  11. Using Neural Networks 

    E-Print Network [OSTI]

    Gabel, S.

    2003-01-01

    A neural network approach is employed for estimating key efficiency parameters in a gas turbine engine. The concept is demonstrated within a limited operating region for a given engine. The neural network is developed to estimate certain...

  12. Class network routing

    DOE Patents [OSTI]

    Bhanot, Gyan (Princeton, NJ); Blumrich, Matthias A. (Ridgefield, CT); Chen, Dong (Croton On Hudson, NY); Coteus, Paul W. (Yorktown Heights, NY); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Steinmacher-Burow, Burkhard D. (Mount Kisco, NY); Takken, Todd E. (Mount Kisco, NY); Vranas, Pavlos M. (Bedford Hills, NY)

    2009-09-08

    Class network routing is implemented in a network such as a computer network comprising a plurality of parallel compute processors at nodes thereof. Class network routing allows a compute processor to broadcast a message to a range (one or more) of other compute processors in the computer network, such as processors in a column or a row. Normally this type of operation requires a separate message to be sent to each processor. With class network routing pursuant to the invention, a single message is sufficient, which generally reduces the total number of messages in the network as well as the latency to do a broadcast. Class network routing is also applied to dense matrix inversion algorithms on distributed memory parallel supercomputers with hardware class function (multicast) capability. This is achieved by exploiting the fact that the communication patterns of dense matrix inversion can be served by hardware class functions, which results in faster execution times.

  13. Rooftop Unit Network Project

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

    Network Project RTU Network Project Michael Brambley, Ph.D. Pacific Northwest National Laboratory Michael.Brambley@pnnl.gov (509) 375-6875 April 4, 2013 2 | Building Technologies...

  14. Financial Networks Anna Nagurney

    E-Print Network [OSTI]

    Nagurney, Anna

    Gothenburg University Gothenburg, Sweden and John F. Smith Memorial Professor Director ­ Virtual Center themselves, such as the Internet with electric power networks, financial networks, and transportation Cables Radio Links Voice, Data, Video Energy Pumping Stations, Plants Pipelines, Transmission Lines Water

  15. Network coded wireless architecture

    E-Print Network [OSTI]

    Katti, Sachin Rajsekhar

    2008-01-01

    Wireless mesh networks promise cheap Internet access, easy deployment, and extended range. In their current form, however, these networks suffer from both limited throughput and low reliability; hence they cannot meet the ...

  16. Mobile Networks and Applications

    E-Print Network [OSTI]

    Chen, Min

    of Western Macedonia, Macedonia, Greece e-mail: vasilako@ath.forthnet.gr Keywords wireless sensor networks

  17. Metallic nanowire networks

    DOE Patents [OSTI]

    Song, Yujiang; Shelnutt, John A.

    2012-11-06

    A metallic nanowire network synthesized using chemical reduction of a metal ion source by a reducing agent in the presence of a soft template comprising a tubular inverse micellar network. The network of interconnected polycrystalline nanowires has a very high surface-area/volume ratio, which makes it highly suitable for use in catalytic applications.

  18. THE 3 ?m SPECTRUM OF JUPITER's IRREGULAR SATELLITE HIMALIA

    SciTech Connect (OSTI)

    Brown, M. E. [Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125 (United States); Rhoden, A. R., E-mail: mbrown@caltech.edu, E-mail: Alyssa.Rhoden@jhuapl.edu [Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723 (United States)

    2014-10-01

    We present a medium resolution spectrum of Jupiter's irregular satellite Himalia covering the critical 3 ?m spectral region. The spectrum shows no evidence for aqueously altered phyllosilicates, as had been suggested from the tentative detection of a 0.7 ?m absorption, but instead shows a spectrum strikingly similar to the C/CF type asteroid 52 Europa. 52 Europa is the prototype of a class of asteroids generally situated in the outer asteroid belt between less distant asteroids which show evidence for aqueous alteration and more distant asteroids which show evidence for water ice. The spectral match between Himalia and this group of asteroids is surprising and difficult to reconcile with models of the origin of the irregular satellites.

  19. Multicolor Photometry of the Uranus Irregular Satellites Sycorax and Caliban

    E-Print Network [OSTI]

    Michele Maris; Giovanni Carraro; Gabriele Cremonese; Marco Fulle

    2001-01-27

    We report on accurate BVRI photometry for the two Uranus irregular satellites Sycorax and Caliban. We derive colours, showing that Sycorax is bluer than Caliban. Our data allows us to detect a significant variability in the Caliban's light-curve, which suggests an estimated period of about 3 hours. Despite it is the brighter of the two bodies, Sycorax does not display a strong statistically significant variability. However our data seem to suggest a period of about 4 hours

  20. Toshiba recommends Windows 7 Satellite L750-12T

    E-Print Network [OSTI]

    Saskatchewan, University of

    Toshiba recommends Windows 7 Model: i Satellite L750-12T 2nd Generation Intel® CoreTM i3-2350M processor­ 2.3 GHz, Genuine Windows® 7 Home Premium, 15.6" HD LCD, 4GB DDR3, 640GB HDD S-ATA, DVD Super and Enhanced Intel® SpeedStep® Technology Operating System Genuine Windows® 7 Home Premium Key Features Toshiba

  1. Orbital perturbations of the Galilean satellites during planetary encounters

    SciTech Connect (OSTI)

    Deienno, Rogerio; Nesvorný, David [Southwest Research Institute, Boulder, CO (United States); Vokrouhlický, David [Institute of Astronomy, Charles University, Prague (Czech Republic); Yokoyama, Tadashi, E-mail: rogerio.deienno@gmail.com [Universidade Estadual Paulista, Rio Claro, SP (Brazil)

    2014-08-01

    The Nice model of the dynamical instability and migration of the giant planets can explain many properties of the present solar system, and can be used to constrain its early architecture. In the jumping-Jupiter version of the Nice model, required from the terrestrial planet constraint and dynamical structure of the asteroid belt, Jupiter has encounters with an ice giant. Here, we study the survival of the Galilean satellites in the jumping-Jupiter model. This is an important concern because the ice-giant encounters, if deep enough, could dynamically perturb the orbits of the Galilean satellites and lead to implausible results. We performed numerical integrations where we tracked the effect of planetary encounters on the Galilean moons. We considered three instability cases from Nesvorný and Morbidelli that differed in the number and distribution of encounters. We found that in one case, where the number of close encounters was relatively small, the Galilean satellite orbits were not significantly affected. In the other two, the orbital eccentricities of all moons were excited by encounters, Callisto's semimajor axis changed, and, in a large fraction of trials, the Laplace resonance of the inner three moons was disrupted. The subsequent evolution by tides damps eccentricities and can recapture the moons in the Laplace resonance. A more important constraint is represented by the orbital inclinations of the moons, which can be excited during the encounters and not appreciably damped by tides. We find that one instability case taken from Nesvorný and Morbidelli clearly does not meet this constraint. This shows how the regular satellites of Jupiter can be used to set limits on the properties of encounters in the jumping-Jupiter model, and help us to better understand how the early solar system evolved.

  2. Network Characterization Service (NCS)

    SciTech Connect (OSTI)

    Jin, Guojun; Yang, George; Crowley, Brian; Agarwal, Deborah

    2001-06-06

    Distributed applications require information to effectively utilize the network. Some of the information they require is the current and maximum bandwidth, current and minimum latency, bottlenecks, burst frequency, and congestion extent. This type of information allows applications to determine parameters like optimal TCP buffer size. In this paper, we present a cooperative information-gathering tool called the network characterization service (NCS). NCS runs in user space and is used to acquire network information. Its protocol is designed for scalable and distributed deployment, similar to DNS. Its algorithms provide efficient, speedy and accurate detection of bottlenecks, especially dynamic bottlenecks. On current and future networks, dynamic bottlenecks do and will affect network performance dramatically.

  3. Comparison of satellite-derived and in-situ observations of ice and snow surface temperatures over Greenland

    E-Print Network [OSTI]

    Box, Jason E.

    Comparison of satellite-derived and in-situ observations of ice and snow surface temperatures over temperature in the data-sparse cryosphere is by satellite remote sensing. The uncertainties in satellite-derived) records needed for climate studies. In this work we assess satellite-derived "clear-sky" LST products from

  4. The NASA Aura satellite houses four instruments to study atmospheric ozone. The Ozone Monitoring Instrument (OMI) onboard the satellite provides global total column ozone (TCO) and in combination

    E-Print Network [OSTI]

    Thompson, Anne

    iii ABSTRACT The NASA Aura satellite houses four instruments to study atmospheric ozone. The Ozone Monitoring Instrument (OMI) onboard the satellite provides global total column ozone (TCO) and in combination with other instruments tropospheric ozone residual (TOR) can be derived. In this study, the trajectory

  5. Flow-based XOR Network Coding for Lossy Wireless Networks

    E-Print Network [OSTI]

    Wu, Jie

    1 Flow-based XOR Network Coding for Lossy Wireless Networks Abdallah Khreishah, Issa M. Khalil, Pouya Ostovari, and Jie Wu Abstract--A practical way for maximizing the throughput of a wireless network. We also extend our 2-hop relay networks results to multihop wireless networks by providing a linear

  6. Experiences with 100Gbps Network Applications

    E-Print Network [OSTI]

    Balman, Mehmet

    2013-01-01

    Network Initiative (ANI) Testbed, which is supported by thes Advanced Network Initiative (ANI) network and testbed 5 ,DOE Magellan Project [17]. The ANI Network is a prototype

  7. T-610: Red Hat kdenetwork security update

    Broader source: Energy.gov [DOE]

    A directory traversal flaw was found in the way KGet, a download manager, handled the "file" element in Metalink files.

  8. Nonperiodic echoes from quantum mushroom billiard hats

    E-Print Network [OSTI]

    B. Dietz; T. Friedrich; M. Miski-Oglu; A. Richter; F. Schäfer; T. H. Seligmann

    2009-08-28

    Nonperiodic tunable quantum echoes have been observed in experiments with an open microwave billiard whose geometry under certain conditions provides Fibonacci like sequences of classical delay times. These sequences combined with the reflection at the opening induced by the wave character of the experiment and the size of the opening allow to shape quantum pulses. The pulses are obtained by response of an integrable scattering system.

  9. hat does a group of 30 "sustainabil-

    E-Print Network [OSTI]

    Handy, Susan L.

    of the Olympic Village, to a build-out of 16,000 people, with 250 affordable housing units--and ecology is part-story-tall common house spar- rows? Most of them admire die anatomi- cally correct metal sculptures; a few wonder sparrow reminds visitors about the need for ecological balance. Sparrows are plentiful across North

  10. Hats off, Galileo: Early Richard Serra

    E-Print Network [OSTI]

    Byrd, Anne Elizabeth

    2011-01-01

    and others who shared “Pop art’s perversity and irreverence”art-world familial-quality, noting that the exhibition was presided over by Dorothy Lichtenstein, pointing out that she was the Pop

  11. MOOCs and Libraries: Many Hats, Many Questions 

    E-Print Network [OSTI]

    Faulkner, Ashley E.

    2015-01-01

    graduated with both her MLIS and MBA from Kent State University and her professional goals center around the meeting of these disciplines within the study, sup- port and instruction of information and financial literacy. She is a member of the American...

  12. Microsoft Word - HAT 2008-final.doc

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and MyersHr. Anthony V.HowJanuary2004 - -Mexican

  13. Seven Deadliest Network Attacks

    SciTech Connect (OSTI)

    Prowell, Stacy J [ORNL; Borkin, Michael [None; Kraus, Robert [Solutionary, Inc.

    2010-05-01

    Do you need to keep up with the latest hacks, attacks, and exploits effecting networks? Then you need "Seven Deadliest Network Attacks". This book pinpoints the most dangerous hacks and exploits specific to networks, laying out the anatomy of these attacks including how to make your system more secure. You will discover the best ways to defend against these vicious hacks with step-by-step instruction and learn techniques to make your computer and network impenetrable. Attacks detailed in this book include: Denial of Service; War Dialing; Penetration 'Testing'; Protocol Tunneling; Spanning Tree Attacks; Man-in-the-Middle; and, Password Replay. Knowledge is power, find out about the most dominant attacks currently waging war on computers and networks globally. Discover the best ways to defend against these vicious attacks; step-by-step instruction shows you how. Institute countermeasures, don't be caught defenseless again, learn techniques to make your computer and network impenetrable.

  14. Reconfigureable network node

    DOE Patents [OSTI]

    Vanderveen, Keith B. (Tracy, CA); Talbot, Edward B. (Livermore, CA); Mayer, Laurence E. (Davis, CA)

    2008-04-08

    Nodes in a network having a plurality of nodes establish communication links with other nodes using available transmission media, as the ability to establish such links becomes available and desirable. The nodes predict when existing communications links will fail, become overloaded or otherwise degrade network effectiveness and act to establish substitute or additional links before the node's ability to communicate with the other nodes on the network is adversely affected. A node stores network topology information and programmed link establishment rules and criteria. The node evaluates characteristics that predict existing links with other nodes becoming unavailable or degraded. The node then determines whether it can form a communication link with a substitute node, in order to maintain connectivity with the network. When changing its communication links, a node broadcasts that information to the network. Other nodes update their stored topology information and consider the updated topology when establishing new communications links for themselves.

  15. Chapters 6 & 8 Wireless Networks

    E-Print Network [OSTI]

    Lu, Enyue "Annie"

    Chapters 6 & 8 Wireless Networks and Security Computer Networking:ATop Down Approach 6th edition.W. Ross, All Rights Reserved Wireless, Mobile Networks 6-1 #12;Wireless, Mobile Networks 6-2 Ch. 6: Wireless and Mobile Networks Background: # wireless (mobile) phone subscribers now exceeds # wired phone

  16. Wireless Network Economics and Games

    E-Print Network [OSTI]

    Huang, Jianwei

    Wireless Network Economics and Games Jianwei Huang Network Communications & Economics Lab-play-games/id642100914! ! · J. Huang and L. Gao, "Wireless Network Pricing," Synthesis Lectures on Communication Networks://jianwei.ie.cuhk.edu.hk/publication/Book/ WirelessNetworkPricing.pdf! ! #12;Why Wireless Economics and Games? #12;Wireless Utopia · Wireless spectrum

  17. Community Cellular Networks

    E-Print Network [OSTI]

    Heimerl, Kurtis

    2013-01-01

    2.1.3 Rural Cellular . . . . . . . . . . . . . . 2.2Community Cellular . . . . . . . . . . . . . . . . .9.1.1Community Cellular Networks 3.1 De?ning Community Cellular

  18. Wireless Network Esercitazioni

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Wireless Network Esercitazioni Alessandro Villani avillani@science.unitn.it #12;Ethereal #12 wireless LAN (WLAN) Non è ancora realmente utilizzato Scaricabile all'indirizzo: http

  19. Monte Carlo Simulations of Macho Parallaxes From a Satellite

    E-Print Network [OSTI]

    Thomas Boutreux; Andrew Gould

    1995-07-25

    Three ongoing microlensing experiments have found more candidate events than expected from the known stars. These experiments measure only one parameter of the massive compact halo objects (machos), the magnification time scale of the events. More information is required to understand the nature of the machos. A satellite experiment has been proposed to measure their projected transverse speed $\\tilde{v} = v/(1-z)$, where $v$ is the macho transverse speed and $z$ its distance divided by the distance of the source. Measurement of $\\tilde{v}$ would determine whether the machos were in the Galactic disk, Galactic halo, or in the Large Magellanic Cloud (LMC). We simulate events observed toward the LMC by the Earth and by a satellite in an Earth like heliocentric orbit. To leading order, such an experiment determines $\\tilde{v}$ up to a two fold degeneracy. More precise measurements break the degeneracy. We show that with photometric precisions of 3\\% to 4\\% and approximately 1 observation per day, $\\tilde{v}$ can be measured with a maximum error of 20\\% for 70\\% to 90\\% of events similar to the ones reported by the EROS and MACHO collaborations. The projected transverse velocity is known with the same maximum error for 60\\% to 75\\% of these events. This 20\\% maximum error is not a 1 $\\sigma$ error but is mostly due to degeneracy between two possible solutions, each one being localized to much better than 20\\%. These results are obtained with an Earth-satellite separation of 1 AU, and are improved by a larger separation.

  20. Potential Networks, Contagious Communities, and Understanding Social Network Structure

    E-Print Network [OSTI]

    Schoenebeck, Grant

    2013-01-01

    In this paper we study how the network of agents adopting a particular technology relates to the structure of the underlying network over which the technology adoption spreads. We develop a model and show that the network of agents adopting a particular technology may have characteristics that differ significantly from the social network of agents over which the technology spreads. For example, the network induced by a cascade may have a heavy-tailed degree distribution even if the original network does not. This provides evidence that online social networks created by technology adoption over an underlying social network may look fundamentally different from social networks and indicates that using data from many online social networks may mislead us if we try to use it to directly infer the structure of social networks. Our results provide an alternate explanation for certain properties repeatedly observed in data sets, for example: heavy-tailed degree distribution, network densification, shrinking diameter...

  1. Assessment of a satellite power system and six alternative technologies

    SciTech Connect (OSTI)

    Wolsko, T.; Whitfield, R.; Samsa, M.; Habegger, L.S.; Levine, E.; Tanzman, E.

    1981-04-01

    The satellite power system is assessed in comparison to six alternative technologies. The alternatives are: central-station terrestrial photovoltaic systems, conventional coal-fired power plants, coal-gasification/combined-cycle power plants, light water reactor power plants, liquid-metal fast-breeder reactors, and fusion. The comparison is made regarding issues of cost and performance, health and safety, environmental effects, resources, socio-economic factors, and insitutional issues. The criteria for selecting the issues and the alternative technologies are given, and the methodology of the comparison is discussed. Brief descriptions of each of the technologies considered are included. (LEW)

  2. Satellite image analysis for surveillance, vegetation and climate change

    SciTech Connect (OSTI)

    Cai, D Michael

    2011-01-18

    Recently, many studies have provided abundant evidence to show the trend of tree mortality is increasing in many regions, and the cause of tree mortality is associated with drought, insect outbreak, or fire. Unfortunately, there is no current capability available to monitor vegetation changes, and correlate and predict tree mortality with CO{sub 2} change, and climate change on the global scale. Different survey platforms (methods) have been used for forest management. Typical ground-based forest surveys measure tree stem diameter, species, and alive or dead. The measurements are low-tech and time consuming, but the sample sizes are large, running into millions of trees, covering large areas, and spanning many years. These field surveys provide powerful ground validation for other survey methods such as photo survey, helicopter GPS survey, and aerial overview survey. The satellite imagery has much larger coverage. It is easier to tile the different images together, and more important, the spatial resolution has been improved such that close to or even higher than aerial survey platforms. Today, the remote sensing satellite data have reached sub-meter spatial resolution for panchromatic channels (IKONOS 2: 1 m; Quickbird-2: 0.61 m; Worldview-2: 0.5 m) and meter spatial resolution for multi-spectral channels (IKONOS 2: 4 meter; Quickbird-2: 2.44 m; Worldview-2: 2 m). Therefore, high resolution satellite imagery can allow foresters to discern individual trees. This vital information should allow us to quantify physiological states of trees, e.g. healthy or dead, shape and size of tree crowns, as well as species and functional compositions of trees. This is a powerful data resource, however, due to the vast amount of the data collected daily, it is impossible for human analysts to review the imagery in detail to identify the vital biodiversity information. Thus, in this talk, we will discuss the opportunities and challenges to use high resolution satellite imagery and machine learning theory to monitor tree mortality at the level of individual trees.

  3. Production process for advanced space satellite system cables/interconnects.

    SciTech Connect (OSTI)

    Mendoza, Luis A.

    2007-12-01

    This production process was generated for the satellite system program cables/interconnects group, which in essences had no well defined production process. The driver for the development of a formalized process was based on the set backs, problem areas, challenges, and need improvements faced from within the program at Sandia National Laboratories. In addition, the formal production process was developed from the Master's program of Engineering Management for New Mexico Institute of Mining and Technology in Socorro New Mexico and submitted as a thesis to meet the institute's graduating requirements.

  4. Water Ice on the Satellite of Kuiper Belt Object 2003 EL61

    E-Print Network [OSTI]

    K. M Barkume; M. E. Brown; E. L. Schaller

    2006-01-24

    We have obtained a near infrared spectrum of the brightest satellite of the large Kuiper Belt Object, 2003 EL61. The spectrum has absorption features at 1.5 and 2.0 microns, indicating that water ice is present on the surface. We find that the satellite's absorption lines are much deeper than water ice features typically found on Kuiper Belt Objects. We argue that the unusual spectrum indicates that the satellite was likely formed by impact and not by capture.

  5. On Benefits of Network Coding in Bidirected Networks and Hyper-networks

    E-Print Network [OSTI]

    Li, Zongpeng

    . It was shown that network coding helps increase the throughput and reduce the cost of data transmission to study the coding advantage in two types of parameterized networks, with richer modeling power. The firstOn Benefits of Network Coding in Bidirected Networks and Hyper-networks Xunrui Yin, Xin Wang, Jin

  6. A multiobjective, multidisciplinary design optimization methodology for the conceptual design of distributed satellite systems

    E-Print Network [OSTI]

    Jilla, Cyrus D., 1974-

    2002-01-01

    A multiobjective, multidisciplinary design optimization methodology for mathematically modeling the distributed satellite system (DSS) conceptual design problem as an optimization problem has been developed to advance the ...

  7. ERS 14.1 Satellite Accumulation Ares (RCRA Compliance), 4/30/13

    Broader source: Energy.gov [DOE]

    The objective of this surveillance is to evaluate the effectiveness of the contractor's management of hazardous and mixed wastes in satellite accumulation areas.  The Facility Representative...

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

    E-Print Network [OSTI]

    Naidu, Shantanu

    2015-01-01

    characterization of Binary Near-Earth Asteroid (185851) 20003 Near-Earth Asteroid Satellite Spins Under Spin-Orbitlibration amplitudes for synchronous near-Earth as- teroid

  9. Molecular Analysis of Replication and Packaging Mechanism of Satellite Tobacco Mosaic Virus

    E-Print Network [OSTI]

    Sivanandam, Venkatesh

    2013-01-01

    RH, Symons RH. Cucumber mosaic virus contains a functionallycowpea chlorotic mottle viruses exhibit neutral effects inof satellite tobacco mosaic virus and its helper virus in

  10. An analysis of long-term agreements with suppliers in Lockheed Martin's commercial satellite systems division

    E-Print Network [OSTI]

    Singh, Hem

    2009-01-01

    Lockheed Martin designs and builds commercial satellites to customers' specifications. The customers, such as telecommunications companies and weather forecasters, are very price sensitive and, usually, award contracts to ...

  11. Survivability Considerations in Wireless Networks

    E-Print Network [OSTI]

    Ning, Jianxia

    2012-01-01

    Forensics Analysis of Packet Losses in Wireless Networks 2.1Neighbor Discovery in 60 GHz Indoor Wireless Networks 4.1in Wireless Networks . . . . . . . . . . . . . 4.2.4

  12. Enhancing network robustness via shielding

    E-Print Network [OSTI]

    Zhang, Jianan, S.M. Massachusetts Institute of Technology

    2014-01-01

    Shielding critical links enhances network robustness and provides a new way of designing robust networks. We first consider shielding critical links to guarantee network connectivity after any failure under geographical ...

  13. Umatilla Satellite and Release Sites Project : Final Siting Report.

    SciTech Connect (OSTI)

    Montgomery, James M.

    1992-04-01

    This report presents the results of site analysis for the Umatilla Satellite and Release Sites Project. The purpose of this project is to provide engineering services for the siting and conceptual design of satellite and release facilities for the Umatilla Basin hatchery program. The Umatilla Basin hatchery program consists of artificial production facilities for salmon and steelhead to enhance production in the Umatilla River as defined in the Umatilla master plan approved in 1989 by the Northwest Power Planning Council. Facilities identified in the master plan include adult salmon broodstock holding and spawning facilities, facilities for recovery, acclimation, and/or extended rearing of salmon juveniles, and development of river sites for release of hatchery salmon and steelhead. The historic and current distribution of fall chinook, summer chinook, and coho salmon and steelhead trout was summarized for the Umatilla River basin. Current and future production and release objectives were reviewed. Twenty seven sites were evaluated for the potential and development of facilities. Engineering and environmental attributes of the sites were evaluated and compared to facility requirements for water and space. Site screening was conducted to identify the sites with the most potential for facility development. Alternative sites were selected for conceptual design of each facility type. A proposed program for adult holding facilities, final rearing/acclimation, and direct release facilities was developed.

  14. Deep Lambertian Networks Introduction

    E-Print Network [OSTI]

    Toronto, University of

    Deep Lambertian Networks Introduction Learns distributions over 3D object shapes from sets of 2D-shot recognition possible Uses multiplicative interactions to approximate the Lambertian reflectance model Deep 30 50 Experiments Deep Lambertian Networks Inference Samples from albedo DBN Face Relighting Simple

  15. Miniaturized wireless sensor network

    E-Print Network [OSTI]

    Lecointre, Aubin; Dubuc, David; Katia, Grenier; Patrick, Pons; Aubert, Hervé; Muller, A; Berthou, Pascal; Gayraud, Thierry; Plana, Robert

    2010-01-01

    This paper addresses an overview of the wireless sensor networks. It is shown that MEMS/NEMS technologies and SIP concept are well suited for advanced architectures. It is also shown analog architectures have to be compatible with digital signal techniques to develop smart network of microsystem.

  16. Water Network Design by MINLP

    E-Print Network [OSTI]

    2008-02-12

    We propose a solution method for a water-network optimization problem using a ... The optimal design of a WDN (Water Distribution Network) consists, in its ...

  17. Software Defined Networking (SDN) Project

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

    Networking (SDN) Project Energy sector-focused SDN flow controller to manage control system networks centrally and securely Background Traditional information technology (IT)...

  18. Siphons in Chemical Reaction Networks

    E-Print Network [OSTI]

    Shiu, Anne; Sturmfels, Bernd

    2010-01-01

    strongly-connected chemical reaction, and the compu- tationcredited. Siphons in Chemical Reaction Networks Referencesto persistence analysis in chemical reaction networks. In:

  19. The Future of Network Neutrality

    E-Print Network [OSTI]

    Guttentag, Mikhail

    2009-01-01

    November 3, 2007). Print. The Future of Network Neutralityappeali.html>. The Future of Network Neutrality 19 ———. "Books, 2006. Print. ———. The Future of Ideas. New York, NY:

  20. Wireless Networking | ornl.gov

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

    Wireless Networking A PDF version of these instructions is also available. As a visitor to Oak Ridge National Laboratory (ORNL), access to the ORNL wireless network is available...

  1. Fault localization in backbone networks

    E-Print Network [OSTI]

    Kompella, Ramana Rao

    2007-01-01

    imperfections stem from inherent churn in the network andtrack the network and therefore exhibit churn. The IPFLdriven, and copes with churn by reloading multiple times

  2. Collective network routing

    DOE Patents [OSTI]

    Hoenicke, Dirk

    2014-12-02

    Disclosed are a unified method and apparatus to classify, route, and process injected data packets into a network so as to belong to a plurality of logical networks, each implementing a specific flow of data on top of a common physical network. The method allows to locally identify collectives of packets for local processing, such as the computation of the sum, difference, maximum, minimum, or other logical operations among the identified packet collective. Packets are injected together with a class-attribute and an opcode attribute. Network routers, employing the described method, use the packet attributes to look-up the class-specific route information from a local route table, which contains the local incoming and outgoing directions as part of the specifically implemented global data flow of the particular virtual network.

  3. Comparative analysis of collaboration networks

    SciTech Connect (OSTI)

    Progulova, Tatiana; Gadjiev, Bahruz [International University for Nature, Society and Man, 19 Universitetskaya Street, Dubna, 141980 (Russian Federation)

    2011-03-14

    In this paper we carry out a comparative analysis of the word network as the collaboration network based on the novel by M. Bulgakov 'Master and Margarita', the synonym network of the Russian language as well as the Russian movie actor network. We have constructed one-mode projections of these networks, defined degree distributions for them and have calculated main characteristics. In the paper a generation algorithm of collaboration networks has been offered which allows one to generate networks statistically equivalent to the studied ones. It lets us reveal a structural correlation between word network, synonym network and movie actor network. We show that the degree distributions of all analyzable networks are described by the distribution of q-type.

  4. THE UK'S INNOVATION NETWORK KNOWLEDGE TRANSFER NETWORK

    E-Print Network [OSTI]

    ­ Support available from the Innovation Network Brian J. McCarthy ­ Knowledge Transfer Manager ­ Materials, entrepreneurs, academics and funders to develop new products and services. We help business to grow the economy people together `to make magic happen' 6,000+ Delegates per year #12;PAGE6 The KTN Structure · Materials

  5. Estimating global and North American methane emissions with high spatial resolution using GOSAT satellite data

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

    Turner, A. J.; Jacob, D. J.; Wecht, K. J.; Maasakkers, J. D.; Lundgren, E.; Andrews, A. E.; Biraud, S. C.; Boesch, H.; Bowman, K. W.; Deutscher, N. M.; et al

    2015-06-30

    We use 2009–2011 space-borne methane observations from the Greenhouse Gases Observing SATellite (GOSAT) to estimate global and North American methane emissions with 4° × 5° and up to 50 km × 50 km spatial resolution, respectively. GEOS-Chem and GOSAT data are first evaluated with atmospheric methane observations from surface and tower networks (NOAA/ESRL, TCCON) and aircraft (NOAA/ESRL, HIPPO), using the GEOS-Chem chemical transport model as a platform to facilitate comparison of GOSAT with in situ data. This identifies a high-latitude bias between the GOSAT data and GEOS-Chem that we correct via quadratic regression. Our global adjoint-based inversion yields a totalmore »methane source of 539 Tg a?1 with some important regional corrections to the EDGARv4.2 inventory used as a prior. Results serve as dynamic boundary conditions for an analytical inversion of North American methane emissions using radial basis functions to achieve high resolution of large sources and provide error characterization. We infer a US anthropogenic methane source of 40.2–42.7 Tg a-1, as compared to 24.9–27.0 Tg a-1 in the EDGAR and EPA bottom-up inventories, and 30.0–44.5 Tg a-1 in recent inverse studies. Our estimate is supported by independent surface and aircraft data and by previous inverse studies for California. We find that the emissions are highest in the southern–central US, the Central Valley of California, and Florida wetlands; large isolated point sources such as the US Four Corners also contribute. Using prior information on source locations, we attribute 29–44 % of US anthropogenic methane emissions to livestock, 22–31 % to oil/gas, 20 % to landfills/wastewater, and 11–15 % to coal. Wetlands contribute an additional 9.0–10.1 Tg a-1.« less

  6. Estimating global and North American methane emissions with high spatial resolution using GOSAT satellite data

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

    Turner, A. J.; Jacob, D. J.; Wecht, K. J.; Maasakkers, J. D.; Lundgren, E.; Andrews, A. E.; Biraud, S. C.; Boesch, H.; Bowman, K. W.; Deutscher, N. M.; et al

    2015-06-30

    We use 2009–2011 space-borne methane observations from the Greenhouse Gases Observing SATellite (GOSAT) to estimate global and North American methane emissions with 4° × 5° and up to 50 km × 50 km spatial resolution, respectively. GEOS-Chem and GOSAT data are first evaluated with atmospheric methane observations from surface and tower networks (NOAA/ESRL, TCCON) and aircraft (NOAA/ESRL, HIPPO), using the GEOS-Chem chemical transport model as a platform to facilitate comparison of GOSAT with in situ data. This identifies a high-latitude bias between the GOSAT data and GEOS-Chem that we correct via quadratic regression. Our global adjoint-based inversion yields a totalmore »methane source of 539 Tg a?1 with some important regional corrections to the EDGARv4.2 inventory used as a prior. Results serve as dynamic boundary conditions for an analytical inversion of North American methane emissions using radial basis functions to achieve high resolution of large sources and provide error characterization. We infer a US anthropogenic methane source of 40.2–42.7 Tg a?1, as compared to 24.9–27.0 Tg a?1 in the EDGAR and EPA bottom-up inventories, and 30.0–44.5 Tg a?1 in recent inverse studies. Our estimate is supported by independent surface and aircraft data and by previous inverse studies for California. We find that the emissions are highest in the southern–central US, the Central Valley of California, and Florida wetlands; large isolated point sources such as the US Four Corners also contribute. Using prior information on source locations, we attribute 29–44 % of US anthropogenic methane emissions to livestock, 22–31 % to oil/gas, 20 % to landfills/wastewater, and 11–15 % to coal. Wetlands contribute an additional 9.0–10.1 Tg a?1.« less

  7. Estimating global and North American methane emissions with high spatial resolution using GOSAT satellite data

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

    Turner, A. J.; Jacob, D. J.; Wecht, K. J.; Maasakkers, J. D.; Biraud, S. C.; Boesch, H.; Bowman, K. W.; Deutscher, N. M.; Dubey, M. K.; Griffith, D. W. T.; et al

    2015-02-18

    We use 2009–2011 space-borne methane observations from the Greenhouse Gases Observing SATellite (GOSAT) to constrain global and North American inversions of methane emissions with 4° × 5° and up to 50 km × 50 km spatial resolution, respectively. The GOSAT data are first evaluated with atmospheric methane observations from surface networks (NOAA, TCCON) and aircraft (NOAA/DOE, HIPPO), using the GEOS-Chem chemical transport model as a platform to facilitate comparison of GOSAT with in situ data. This identifies a high-latitude bias between the GOSAT data and GEOS-Chem that we correct via quadratic regression. The surface and aircraft data are subsequently usedmore »for independent evaluation of the methane source inversions. Our global adjoint-based inversion yields a total methane source of 539 Tg a?1 and points to a large East Asian overestimate in the EDGARv4.2 inventory used as a prior. Results serve as dynamic boundary conditions for an analytical inversion of North American methane emissions using radial basis functions to achieve high resolution of large sources and provide full error characterization. We infer a US anthropogenic methane source of 40.2–42.7 Tg a?1, as compared to 24.9–27.0 Tg a?1 in the EDGAR and EPA bottom-up inventories, and 30.0–44.5 Tg a?1 in recent inverse studies. Our estimate is supported by independent surface and aircraft data and by previous inverse studies for California. We find that the emissions are highest in the South-Central US, the Central Valley of California, and Florida wetlands, large isolated point sources such as the US Four Corners also contribute. We attribute 29–44% of US anthropogenic methane emissions to livestock, 22–31% to oil/gas, 20% to landfills/waste water, and 11–15% to coal with an additional 9.0–10.1 Tg a?1 source from wetlands.« less

  8. UCIT Data Network Standards Campus Wireless Network Standard

    E-Print Network [OSTI]

    Habib, Ayman

    UCIT Data Network Standards Campus Wireless Network Standard Classification IT Infrastructure Table.1. Standardization of the U of C's 802.11 wireless networks and frequency bands is required to insure availability of the wireless network to the campus community. Standards of use will improve the wireless service and help

  9. Deep Belief Networks The New Generation of Neural Networks1

    E-Print Network [OSTI]

    Hernández Lobato, José Miguel

    Deep Belief Networks The New Generation of Neural Networks1 Jos´e Miguel Hern´andez Lobato This presentation is mainly based on the work by Geoffrey E. Hinton. 1 / 28 #12;Deep Belief Networks Outline 1 Boltzmann Machines 2 Restricted Boltzmann Machines 3 Deep Belief Networks 4 Applications of Deep Belief

  10. Supervised Learning in Neural Networks without Feedback Networks

    E-Print Network [OSTI]

    Lin, Feng

    Supervised Learning in Neural Networks without Feedback Networks Robert D. Brandt and Feng Lin Abstract In this paper, we study the supervised learning in neural networks. Unlike the com- mon practice (hardware) implementation of arti cial neural networks. This research is supported in part by the National

  11. Network on a Chip: Modeling Wireless Networks with Asynchronous VLSI

    E-Print Network [OSTI]

    Manohar, Rajit

    for Internet-scale networks (for instance, see [2, 3, 5]), as well as the design of flexible and compositionalNetwork on a Chip: Modeling Wireless Networks with Asynchronous VLSI Rajit Manohar and Clinton, Ithaca NY 14853 Abstract We introduce the notion of a network-on-a-chip: a programmable, asynchronous

  12. Byzantine Modification Detection in Multicast Networks with Random Network Coding

    E-Print Network [OSTI]

    Médard, Muriel

    network coding. Each exogenous source packet is augmented with a flexible number of hash symbols of the random network code, and can have the same (or greater) transmission capacity compared to the sourceByzantine Modification Detection in Multicast Networks with Random Network Coding Tracey Ho, Ben

  13. Network Coding-Based Protection Scheme for Elastic Optical Networks

    E-Print Network [OSTI]

    Politècnica de Catalunya, Universitat

    speed transmissions achieved in fiber optical networks. Traditional optical networks consist of a fixed. Recently, optical networks are undergoing significant changes with the purpose of providing a flexible grid with protection schemes for the purpose of reducing power consumption. An additional goal for network providers

  14. Introduction to Network Science 1 Introduction to Network Science

    E-Print Network [OSTI]

    Safro, Ilya

    Introduction to Network Science 1 Introduction to Network Science Instructor: Ilya Safro, 228 McAdams Hall Course: Introduction to Network Science, CP SC 481/681/881 Time: 9:30-10:45 TTh Place: 211 Daniel A 80 B 60 C 0 F #12;Introduction to Network Science 2 Recommended Books (optional) #12;Introduction

  15. Network Dynamics of City Sizes, Trade Networks, and Conflict

    E-Print Network [OSTI]

    White, Douglas R.

    Network Dynamics of City Sizes, Trade Networks, and Conflict Doug White In collaboration world, scale-free ­ but they are not going to get us where we need to go What are the possibilites: city size hierarchies and how they are likely to be driven by trade networks Network realism

  16. Optical Network Testbeds Workshop

    SciTech Connect (OSTI)

    Joe Mambretti

    2007-06-01

    This is the summary report of the third annual Optical Networking Testbed Workshop (ONT3), which brought together leading members of the international advanced research community to address major challenges in creating next generation communication services and technologies. Networking research and development (R&D) communities throughout the world continue to discover new methods and technologies that are enabling breakthroughs in advanced communications. These discoveries are keystones for building the foundation of the future economy, which requires the sophisticated management of extremely large qualities of digital information through high performance communications. This innovation is made possible by basic research and experiments within laboratories and on specialized testbeds. Initial network research and development initiatives are driven by diverse motives, including attempts to solve existing complex problems, the desire to create powerful new technologies that do not exist using traditional methods, and the need to create tools to address specific challenges, including those mandated by large scale science or government agency mission agendas. Many new discoveries related to communications technologies transition to wide-spread deployment through standards organizations and commercialization. These transition paths allow for new communications capabilities that drive many sectors of the digital economy. In the last few years, networking R&D has increasingly focused on advancing multiple new capabilities enabled by next generation optical networking. Both US Federal networking R&D and other national R&D initiatives, such as those organized by the National Institute of Information and Communications Technology (NICT) of Japan are creating optical networking technologies that allow for new, powerful communication services. Among the most promising services are those based on new types of multi-service or hybrid networks, which use new optical networking technologies. Several years ago, when many of these optical networking research topics were first being investigated, they were the subject of controversial debate. The new techniques challenged many long-held concepts related to architecture and technology. However, today all major networking organizations are transitioning toward infrastructure that incorporates these new concepts. This progress has been assisted through the series of Optical Networking Testbed Workshops (ONT). The first (ONT1) outlined a general framework of key issues and topics and developed a series of recommendations (www.nren.nasa.gov/workshop7). The second (ONT2) developed a common vision of optical network technologies, services, infrastructure, and organizations (www.nren.nasa.gov/workshop8). Processes that allow for a common vision encourage widespread deployment of these types of resources among advanced networking communities. Also, such a shared vision enables key concepts and technologies to migrate from basic research testbeds to wider networking communities. The ONT-3 workshop built on these earlier activities by expanding discussion to include additional considerations of the international interoperability and of greater impact of optical networking technology on networking in general. In accordance with this recognition, the workshop confirmed that future-oriented research and development is indispensable to fundamentally change the current Internet architecture to create a global network incorporating completely new concepts. The workshop also recognized that the first priority to allow for this progress is basic research and development, including international collaborative activities, which are important for the global realization of interoperability of a new generation architecture.

  17. Feasibility study of extracting runoff data from satellite altimetry over continental surface waters

    E-Print Network [OSTI]

    Stuttgart, Universität

    the feasibility of extracting runoff data using satellite altimetry over all possible continental surface waters- ered algorithm for extracting runoff from the satellite altimetry is based on making water level. not feasible be- cause of bad quality of extracted water level time series class 4. impossible. Computed runoff

  18. Pitch angle distribution analysis of radiation belt electrons based on Combined Release and Radiation Effects Satellite

    E-Print Network [OSTI]

    Li, Xinlin

    Pitch angle distribution analysis of radiation belt electrons based on Combined Release and Radiation Effects Satellite Medium Electrons A data J. L. Gannon,1 X. Li,1 and D. Heynderickx2 Received 13 the Medium Electrons A instrument on the Combined Release and Radiation Effects Satellite (CRRES), a survey

  19. Risk Management of Student-Run Small Satellite Programs Elizabeth Deems

    E-Print Network [OSTI]

    1 Risk Management of Student-Run Small Satellite Programs by Elizabeth Deems Submitted;3 Risk Management of Student-Run Small Satellite Programs by Elizabeth Deems Submitted to the Department are also discussed. Additionally, several risk management strategies are explored, and the advantages

  20. Level I Guidance Documentation Environmental: Hazardous Waste: Satellite Accumulation Areas (SAA)

    E-Print Network [OSTI]

    Entekhabi, Dara

    "Hazardous Waste", (2) the container's contents written out (e.g. "WASTE OIL, no formulas, no abbreviations(10/28/03) Level I ­ Guidance Documentation Environmental: Hazardous Waste: Satellite Accumulation Areas (SAA) 1. Is all hazardous waste stored in the satellite accumulation area (SAA)? 2

  1. Diurnal variability of upper ocean temperatures from microwave satellite measurements and Argo profiles

    E-Print Network [OSTI]

    Gille, Sarah T.

    measurements. [3] Satellites measure SST at the surface of the ocean. Infrared satellite sensors measure. Data pairs with time separations of up to Æ3 h are used to evaluate systematic differences between a net impact on the climate sys- tem. The objective of this study is to evaluate the character

  2. PROGRESSIVE CLASSIFICATION IN THE COMPRESSED DOMAIN FOR LARGE EOS SATELLITE DATABASES1

    E-Print Network [OSTI]

    Kontoyiannis, Ioannis

    directly on remote sensing data in the compressed domain. 2. PRELIMINARIES We investigate both blockPROGRESSIVE CLASSIFICATION IN THE COMPRESSED DOMAIN FOR LARGE EOS SATELLITE DATABASES1 Vittorio, such as multispectral satellite scenes, com- pressed with wavelet-based or block-transform-based trans- formations

  3. PROGRESSIVE CLASSIFICATION IN THE COMPRESSED DOMAIN FOR LARGE EOS SATELLITE DATABASES 1

    E-Print Network [OSTI]

    Kontoyiannis, Ioannis

    PROGRESSIVE CLASSIFICATION IN THE COMPRESSED DOMAIN FOR LARGE EOS SATELLITE DATABASES 1 Vittorio, such as multispectral satellite scenes, com­ pressed with wavelet­based or block­transform­based trans­ formations to a homo­ geneous block of pixels in the original image or to a hetero­ geneous block. In the first case

  4. Using CO2 spatial variability to quantify representation errors of satellite CO2 retrievals

    E-Print Network [OSTI]

    Michalak, Anna M.

    global data of column- averaged CO2 dry-air mole fraction (XCO2) at high spatial resolutions. These dataUsing CO2 spatial variability to quantify representation errors of satellite CO2 retrievals A. A 2008; published 29 August 2008. [1] Satellite measurements of column-averaged CO2 dry- air mole

  5. Removal and mixing of the coronal gas from satellites in galaxy groups: cooling the intragoup gas

    E-Print Network [OSTI]

    Balogh, Michael L.

    Removal and mixing of the coronal gas from satellites in galaxy groups: cooling the intragoup gas 10 August 2012 (MN LATEX style file v2.2) Removal and mixing of the coronal gas from satellites in galaxy groups: cooling the intragoup gas Jes´us Zavala1,2 , Michael L. Balogh1 , Niayesh Afshordi2

  6. Coastal Wind Mapping from Satellite SAR: Possibilities and Limitations Charlotte Bay Hasager and Merete Bruun Christiansen

    E-Print Network [OSTI]

    - 21 - Coastal Wind Mapping from Satellite SAR: Possibilities and Limitations Charlotte Bay Hasager and Merete Bruun Christiansen Risø National Laboratory, Wind Energy Department, Meteorology Program, VEA-118 Abstract Satellite remote sensing of ocean wind fields from Synthetic Aperture Radar (SAR) observations

  7. Using Outage History to Exclude High-Risk Satellites from GBAS Corrections

    E-Print Network [OSTI]

    Stanford University

    Using Outage History to Exclude High-Risk Satellites from GBAS Corrections Sam Pullen and Per Enge this assumption. A study of unscheduled GPS satellite outages from 1999 to present shows that, as expected, older experienced unscheduled outages are more likely to suffer additional unscheduled outages. Combining these two

  8. Aerosol Optical Depth Prediction from Satellite Observations by Multiple Instance Regression

    E-Print Network [OSTI]

    Vucetic, Slobodan

    Aerosol Optical Depth Prediction from Satellite Observations by Multiple Instance Regression airborne particles that both reflect and absorb incoming solar radiation and whose effect on the Earth the satellite measure- ments, the common objective is prediction of Aerosol Opti- cal Depth (AOD). An important

  9. Observational Datasets We use two different satellite soil moisture datasets, one derived from the Advanced Microwave

    E-Print Network [OSTI]

    Guichard, Francoise

    the Advanced Microwave Scanning Radiometer Earth Observing system (AMSRE) on the Aqua satellite and another from overpasses of satellites with passive microwave sensors onboard as a starting point is done by using motionvectors derived from geostationary data to propagate the microwave rainfall

  10. COMBINING SOLAR IRRADIANCE MEASUREMENTS AND VARIOUS SATELLITE-DERIVED PRODUCTS TO

    E-Print Network [OSTI]

    Heinemann, Detlev

    COMBINING SOLAR IRRADIANCE MEASUREMENTS AND VARIOUS SATELLITE-DERIVED PRODUCTS TO A SITE power plants depend strongly on the availability of beam irradiance. Direct solar irradiance is highly-series. In this paper, a satellite- retrieval for beam irradiance from the new generation is introduced and inter

  11. Validation of satellite observed thermal emission with in-situ measurements over an urban surface

    E-Print Network [OSTI]

    Wunderle, Stefan

    Validation of satellite observed thermal emission with in-situ measurements over an urban surface: Meteorology applied to urban pollution problems). Besides very detailed field measurements of the structure and validations of thermal satellite imagery are conducted in rural, mostly homogeneous areas (Sobrino et al

  12. EVALUATION OF INTERNATIONAL SATELLITE CLOUD CLIMATOLOGY PROJECT (ISCCP) D2 CLOUD AMOUNT CHANGES AND THEIR CONNECTIONS

    E-Print Network [OSTI]

    Schubert, Wayne H.

    EVALUATION OF INTERNATIONAL SATELLITE CLOUD CLIMATOLOGY PROJECT (ISCCP) D2 CLOUD AMOUNT CHANGES #12;ii #12;iii ABSTRACT EVALUATION OF INTERNATIONAL SATELLITE CLOUD CLIMATOLOGY PROJECT (ISCCP) D2 Climatology Project (ISCCP) D2 dataset exhibits a 2.6% per decade decrease in the global all-cloud cloud

  13. Constraints on surface NOx emissions by assimilating satellite observations of multiple species

    E-Print Network [OSTI]

    Constraints on surface NOx emissions by assimilating satellite observations of multiple species; published 6 September 2013. [1] Surface NOx emissions are estimated by a combined assimilation of satellite for species other than NO2 provides additional constraints on the NOx emissions by adjusting

  14. National Oceanic and Atmospheric Administration | NOAA Satellite and Information Service Two Orbits, One Mission

    E-Print Network [OSTI]

    including Earth system monitoring, performs official assessments of the environment, and conducts related prepare for tsunami and other dangerous coastal flooding events. Weather Improved satellite data has from NOAA satellites to issue air quality warnings to residents. Millions of dollars are saved each

  15. Comparisons of optical properties of the coastal ocean derived from satellite ocean color and

    E-Print Network [OSTI]

    Chang, Grace C.

    Comparisons of optical properties of the coastal ocean derived from satellite ocean color Laboratory, Ocean Optics Section, Code 7333, Stennis Space Center, MS 39529 gould@nrlssc.navy.mil Abstract: Satellite-derived optical properties are compared to in situ mooring and ship-based measurements

  16. SUPPORTING GROUP APPLICATIONS VIA SATELLITE CONSTELLATIONS WITH MULTICAST L. Wood, H. Cruickshank, Z. Sun

    E-Print Network [OSTI]

    Wood, Lloyd

    SUPPORTING GROUP APPLICATIONS VIA SATELLITE CONSTELLATIONS WITH MULTICAST L. Wood, H. Cruickshank) to low-altitude low earth orbit (LEO). However, support for low-latency group applications Teledesic satellite has eight intersatellite links, in the 60GHz band, to its two nearest neighbours in each

  17. A Satellite Study of Tropical Moist Convection and Environmental Variability: A Moisture and Thermal Budget Analysis

    E-Print Network [OSTI]

    Masunaga, Hirohiko

    of a variety of satellite sensors including radars, an infrared and microwave sounder unit, and a microwave including air temperature, water vapor, cumulus cloud cover, and surface wind are composited with respect of moisture and dry static energy and their vertical flux at cloud base from satellite observations alone

  18. Estimation of 3D rotation for a satellite from Sun sensors

    E-Print Network [OSTI]

    Estimation of 3D rotation for a satellite from Sun sensors L. Magnis N. Petit MINES Paris: This paper exposes a method to estimate the rotation of a satellite by means of simple Sun sensors located of the Sun. The method is a 3D generalization of an approach originally proposed, using the same setup

  19. Quantifying the seasonal and interannual variability of North American isoprene emissions using satellite observations of the

    E-Print Network [OSTI]

    Palmer, Paul

    satellite observations of the formaldehyde column Paul I. Palmer,1,2 Dorian S. Abbot,1 Tzung-May Fu,1 Daniel isoprene emissions using satellite observations of the formaldehyde (HCHO) columns is subject to errors) to quantify the time-dependent HCHO production from isoprene, a- and b-pinenes, and methylbutenol and show

  20. Multi-grid-cell validation of satellite aerosol property retrievals in INTEX/ITCT/ICARTT 2004

    E-Print Network [OSTI]

    Multi-grid-cell validation of satellite aerosol property retrievals in INTEX/ITCT/ICARTT 2004 P. B 5 December 2006; published 8 May 2007. [1] Aerosol transport off the US Northeast coast during) provided comparisons of AATS AOD spectra to retrievals for 90 grid cells of the satellite radiometers MODIS

  1. Investigating wave data from the FAST satellite by reconstructing the wave distribution function

    E-Print Network [OSTI]

    California at Berkeley, University of

    Investigating wave data from the FAST satellite by reconstructing the wave distribution function G September 2001; published 15 August 2002. [1] We study wave measurements made by the FAST satellite at 4100-km altitude in the auroral region. Three electric and three magnetic wave field components

  2. 1SCTP Multistreaming over satellite M.Atiquzzaman, Univ. of Oklahoma, Oct 22, 2003.

    E-Print Network [OSTI]

    Atiquzzaman, Mohammed

    Page 1 1SCTP Multistreaming over satellite M.Atiquzzaman, Univ. of Oklahoma, Oct 22, 2003. Effect)) School of Computer Science University of Oklahoma. Email: atiq@ieee.org Web: www.cs.ou.edu/~atiq 12th over satellite M.Atiquzzaman, Univ. of Oklahoma, Oct 22, 2003. Introduction TCP is the main transport

  3. Diurnal-seasonal and weather-related variations of land surface temperature observed from geostationary satellites

    E-Print Network [OSTI]

    Vinnikov, Konstantin

    Surface Temperature (SST) monitoring using infrared observations from NOAA satellites is relatively easy temperature from a satellite is possible only for cloudless sky, such monitoring is an important componentDiurnal-seasonal and weather-related variations of land surface temperature observed from

  4. Building Finder: A System to Automatically Identify Buildings in Satellite Imagery

    E-Print Network [OSTI]

    Shahabi, Cyrus

    1 Building Finder: A System to Automatically Identify Buildings in Satellite Imagery Ching with these applications is to accurately and automatically identify objects, such as roads or buildings, in the satellite researchers have been working on trying to identify features, such as roads, buildings, and other features

  5. A History of the Improvement of Internet Protocols Over Satellites Mark Allman

    E-Print Network [OSTI]

    Kruse, Hans

    A History of the Improvement of Internet Protocols Over Satellites Using ACTS Mark Allman NASA GRC on the efficacy of using standard Internet pro- tocols over long-delay satellite channels. These experi- ments-error rates on the performance of the suite of Internet protocols. In par- ticular, we have focused

  6. Satellite number density profiles of primary galaxies in the 2dFGRS

    E-Print Network [OSTI]

    Laura Sales; Diego G. Lambas

    2004-10-21

    We analyse the projected radial distribution of satellites around bright primary galaxies in the 2dFGRS. We have considered several primary-satellite subsamples to search for dependences of the satellite number density profile, \\rho(r_p), on properties of satellites and primaries. We find significant differences of the behaviour of \\rho(r_p) depending on primary characteristics. In star-forming primaries, the satellite number density profile is consistent with power laws within projected distance 20100 kpc), the density profiles of all primaries is well described by power laws, although we notice that for red, early spectral type primaries, the outer slope obtained is steeper than that corresponding to blue, late spectral type ones. We have tested our results by control samples of galaxies identical to the samples of satellites in apparent magnitude and projected distance to the primary, but with a large relative velocity. This sample of unphysical primary-galaxy pairs shows a flat radial density beyond r_p=20 kpc indicating that our results are not biased toward a decrease of the true number of objects due to catalogue selection effects. Our results can be understood in terms of dynamical friction and tidal stripping on satellites in the primary haloes. These processes can effectively transfer energy to the dark matter, flattening the central steep profiles of the satellite distribution in evolved systems.

  7. Satellite-Based Techniques for the Retrieval of Solar Radiation Data A Review of Current European

    E-Print Network [OSTI]

    Heinemann, Detlev

    . In addition, the potential of satellite data for short-term forecasting of solar irradiance is briefly for surface solar irradiance estiumation is not new Largely applied for climate research, global radiativeSatellite-Based Techniques for the Retrieval of Solar Radiation Data ­ A Review of Current European

  8. Impact Assessment of Satellite-Derived Leaf Area Index Datasets Using a General Circulation Model

    E-Print Network [OSTI]

    Xue, Yongkang

    Impact Assessment of Satellite-Derived Leaf Area Index Datasets Using a General Circulation Model the impact of two different remote sensing­derived leaf area index (RSLAI) datasets retrieved from the same using the RSLAI and other satellite-derived land surface products showed sub- stantial improvements

  9. Network aware distributed applications

    SciTech Connect (OSTI)

    Agarwal, Deborah [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Tierney, Brian L. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Gunter, Dan [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Lee, Jason [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Johnston, William [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2001-02-04

    Most distributed applications today manage to utilize only a small percentage of the needed and available network bandwidth. Often application developers are not aware of the potential bandwidth of the network, and therefore do not know what to expect. Even when application developers are aware of the specifications of the machines and network links, they have few resources that can help determine why the expected performance was not achieved. What is needed is a ubiquitous and easy-to-use service that provides reliable, accurate, secure, and timely estimates of dynamic network properties. This service will help advise applications on how to make use of the network's increasing bandwidth and capabilities for traffic shaping and engineering. When fully implemented, this service will make building currently unrealizable levels of network awareness into distributed applications a relatively mundane task. For example, a remote data visualization application could choose between sending a wireframe, a pre-rendered image, or a 3-D representation, based on forecasts of CPU availability and power, compression options, and available bandwidth. The same service will provide on-demand performance information so that applications can compare predicted with actual results, and allow detailed queries about the end-to-end path for application and network tuning and debugging.

  10. A quantum access network

    E-Print Network [OSTI]

    Bernd Fröhlich; James F. Dynes; Marco Lucamarini; Andrew W. Sharpe; Zhiliang Yuan; Andrew J. Shields

    2014-09-02

    The theoretically proven security of quantum key distribution (QKD) could revolutionise how information exchange is protected in the future. Several field tests of QKD have proven it to be a reliable technology for cryptographic key exchange and have demonstrated nodal networks of point-to-point links. However, so far no convincing answer has been given to the question of how to extend the scope of QKD beyond niche applications in dedicated high security networks. Here we show that adopting simple and cost-effective telecommunication technologies to form a quantum access network can greatly expand the number of users in quantum networks and therefore vastly broaden their appeal. We are able to demonstrate that a high-speed single-photon detector positioned at a network node can be shared between up to 64 users for exchanging secret keys with the node, thereby significantly reducing the hardware requirements for each user added to the network. This point-to-multipoint architecture removes one of the main obstacles restricting the widespread application of QKD. It presents a viable method for realising multi-user QKD networks with resource efficiency and brings QKD closer to becoming the first widespread technology based on quantum physics.

  11. 5/8/12 9:21 AMLights Out for Research Satellites? -NYTimes.com Page 2 of 12http://green.blogs.nytimes.com/2012/05/02/lights-out-for-research-satellites/#more-139839

    E-Print Network [OSTI]

    Doty, Sharon Lafferty

    allows researchers to keep an eye on climate change and carbon dioxide in the atmosphere, helping of satellites. Weather satellites also pick up emergency beacons used by those who venture into remote areas

  12. Connectivity in the Yeast Cell Cycle Transcription Network: Inferences from Neural Networks

    E-Print Network [OSTI]

    Hart, Christopher E; Mjolsness, Eric; Wold, Barbara J

    2006-01-01

    Issue 12 | e169 Neural Network Model of Yeast Transcription27. Bishop C (1995) Neural networks for pattern recognition.Network: Inferences from Neural Networks Christopher E. Hart

  13. Using Internet nodes and routers onboard satellites W. Ivancic,

    E-Print Network [OSTI]

    Wood, Lloyd

    , California. Air Force Space Battlelab, Schriever Air Force Base, Colorado. ~ Universal Space Network, Inc) demonstration that took place at Vandenberg Air Force Base. VMOC is one of the US Office of the Secretary were commissioned and used, the onboard router acted as an Internet-Protocol compliant, space-based

  14. BES Science Network Requirements

    SciTech Connect (OSTI)

    Biocca, Alan; Carlson, Rich; Chen, Jackie; Cotter, Steve; Tierney, Brian; Dattoria, Vince; Davenport, Jim; Gaenko, Alexander; Kent, Paul; Lamm, Monica; Miller, Stephen; Mundy, Chris; Ndousse, Thomas; Pederson, Mark; Perazzo, Amedeo; Popescu, Razvan; Rouson, Damian; Sekine, Yukiko; Sumpter, Bobby; Dart, Eli; Wang, Cai-Zhuang -Z; Whitelam, Steve; Zurawski, Jason

    2011-02-01

    The Energy Sciences Network (ESnet) is the primary provider of network connectivityfor the US Department of Energy Office of Science (SC), the single largest supporter of basic research in the physical sciences in the United States. In support of the Office ofScience programs, ESnet regularly updates and refreshes its understanding of the networking requirements of the instruments, facilities, scientists, and science programs that it serves. This focus has helped ESnet to be a highly successful enabler of scientific discovery for over 20 years.

  15. Thermal network reduction

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1983-01-01

    A method is presented for reducing the number of elements required in a thermal network representation of a building. The method is based on matching the actual building response at two frequencies, the diurnal response and 3-day response. The procedure provides a straightforward methodology for combining all the various materials inside a discrete building zone into a few nodes while retaining a high degree of accuracy in the dynamic response. An example is given showing a comparison between a large network and the reduced network.

  16. Thermal network reduction

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1983-06-01

    A method is presented for reducing the number of elements required in a thermal network representation of a building. The method is based on matching the actual building response at two frequencies, the diurnal response and 3-day response. The procedure provides a straightforward methodology for combining all the various materials inside a discrete building zone into a few nodes while retaining a high degree of accuracy in the dynamic response. An example is given showing a comparison between a large network and the reduced network.

  17. An Image-Based Sensor System for Autonomous Rendez-Vous with Uncooperative Satellites

    E-Print Network [OSTI]

    Miravet, Carlos; Krouch, Eloise; del Cura, Juan Manuel

    2008-01-01

    In this paper are described the image processing algorithms developed by SENER, Ingenieria y Sistemas to cope with the problem of image-based, autonomous rendez-vous (RV) with an orbiting satellite. The methods developed have a direct application in the OLEV (Orbital Life Extension Extension Vehicle) mission. OLEV is a commercial mission under development by a consortium formed by Swedish Space Corporation, Kayser-Threde and SENER, aimed to extend the operational life of geostationary telecommunication satellites by supplying them control, navigation and guidance services. OLEV is planned to use a set of cameras to determine the angular position and distance to the client satellite during the complete phases of rendez-vous and docking, thus enabling the operation with satellites not equipped with any specific navigational aid to provide support during the approach. The ability to operate with un-equipped client satellites significantly expands the range of applicability of the system under development, compar...

  18. GLOBULAR CLUSTERS AND DARK SATELLITE GALAXIES THROUGH THE STREAM VELOCITY

    SciTech Connect (OSTI)

    Naoz, Smadar; Narayan, Ramesh, E-mail: snaoz@astro.ucla.edu [Institute for Theory and Computation, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

    2014-08-10

    The formation of purely baryonic globular clusters with no gravitationally bound dark matter is still a theoretical challenge. We show that these objects might form naturally whenever there is a relative stream velocity between baryons and dark matter. The stream velocity causes a phase shift between linear modes of baryonic and dark matter perturbations, which translates to a spatial offset between the two components when they collapse. For a 2? (3?) density fluctuation, baryonic clumps with masses in the range 10{sup 5}-2.5 × 10{sup 6} M {sub ?} (10{sup 5}-4 × 10{sup 6} M {sub ?}) collapse outside the virial radii of their counterpart dark matter halos. These objects could survive as long-lived, dark-matter-free objects and might conceivably become globular clusters. In addition, their dark matter counterparts, which were deprived of gas, might become dark satellite galaxies.

  19. Analysis of Errors in a Special Perturbations Satellite Orbit Propagator

    SciTech Connect (OSTI)

    Beckerman, M.; Jones, J.P.

    1999-02-01

    We performed an analysis of error densities for the Special Perturbations orbit propagator using data for 29 satellites in orbits of interest to Space Shuttle and International Space Station collision avoidance. We find that the along-track errors predominate. These errors increase monotonically over each 36-hour prediction interval. The predicted positions in the along-track direction progressively either leap ahead of or lag behind the actual positions. Unlike the along-track errors the radial and cross-track errors oscillate about their nearly zero mean values. As the number of observations per fit interval decline the along-track prediction errors, and amplitudes of the radial and cross-track errors, increase.

  20. Mechanical Response of Cytoskeletal Networks

    E-Print Network [OSTI]

    Gardel, Margaret

    CHAPTER 19 Mechanical Response of Cytoskeletal Networks Margaret L. Gardel,* Karen E. Kasza, Cli Fluctuation Approaches B. In Vitro MT Networks C. Mechanics of Microtubules in Cells V. Intermediate Filament Networks A. Introduction B. Mechanics of IFs C. Mechanics of Networks VI. Conclusions and Outlook

  1. Network computing : limits and achievability

    E-Print Network [OSTI]

    Karamchandani, Nikhil

    2011-01-01

    wireless sensor networks (WSN). Data measurements (such asnetworking protocols for WSN is hard [24], therefore

  2. CLIMATE NETWORKS The Azimuth Project

    E-Print Network [OSTI]

    Baez, John

    CLIMATE NETWORKS The Azimuth Project John Baez, Jan Galkowski, Graham Jones, Nadja Kutz, Daniel: The network of global corporate control #12;In Complex Networks in Climate Dynamics, Donges et al took daily Networks in Climate Dynamics, Donges et al took daily surface air temperatures on a grid and computed

  3. EVALUATION OF AIRBORNE AND SATELLITE ELECTRO-OPTICAL SENSORS PERFORMANCES BY USE OF HIGH-ALTITUDE CLOUDS OCCURRENCE

    E-Print Network [OSTI]

    EVALUATION OF AIRBORNE AND SATELLITE ELECTRO-OPTICAL SENSORS PERFORMANCES BY USE OF HIGH, F-91761 Palaiseau, France, email : karine.caillault@onera.fr KEYWORDS: sensor performance require optronic sensors, onboard satellite or airborne platform. Performances limitation of these sensors

  4. Assessing the technical, economic and policy-centered feasibility of a proposed satellite communication system for the developing world

    E-Print Network [OSTI]

    Samuels, Ayanna Terehas

    2005-01-01

    Satellite communication systems remain one of the most under utilized development mediums in less industrialized countries. This research proposes to establish a low cost satellite communications system tailored specifically ...

  5. Mesoscale Analyses of Fungal Networks

    E-Print Network [OSTI]

    Lee, Sang Hoon; Porter, Mason A

    2014-01-01

    We give a brief application of mesoscopic response functions (MRFs) to a large set of networks of fungi and slime moulds. We construct "structural networks" by estimating cord conductances (which yield edge weights) from experimental data and "functional networks" by calculating edge weights based on how much nutrient traffic is predicted to occur on each edge. Both types of networks have the same topology, and we compute MRFs for both families of networks to illustrate two different ways of constructing taxonomies to compare large sets of fungal and slime-mould networks to each other. We demonstrate that network taxonomies allow objective groupings of networks across species, treatments, and laboratories. We believe that the groupings that we have derived through our structural and functional taxonomic analyses of fungal networks could be of considerable assistance to biologists in their attempts to capture the impact of treatment combinations on network behaviour.

  6. Precision Irrigators Network 

    E-Print Network [OSTI]

    Bynum, J.; Cothren, T.; Marek, T.; Piccinni, G.

    2007-01-01

    conservation including an "Agricultural Irrigation Water Use Management" BMPs section. The full TWDB Report 362 can be found at: http://www.twdb.state.tx.us/assistance/conservation/consindex.asp. DSS include the Texas High Plains Evapotranspiration Network...

  7. Guest Editorial Overlay networks

    E-Print Network [OSTI]

    Touch, Joe

    of house or to selected business partners. VNs are often distinguished by their use of tunnels, enS-based overlay networks. It virtualizes routers to deploy a virtual backbone with translation gateways to convert

  8. BES Science Network Requirements

    E-Print Network [OSTI]

    Dart, Eli

    2011-01-01

    the Directors of the Office of Science, Office of AdvancedOffice of Basic Energy Sciences. This is LBNL report LBNL-BES Science Network Requirements Report of the Basic Energy

  9. Network medicine Tony Pawsona

    E-Print Network [OSTI]

    strategies can be imple- mented. Transforming medicine into a network driven endeavour will require development. The average price of bringing a drug to market is now approximately 860M USD [1

  10. Computer Systems Network Programming"

    E-Print Network [OSTI]

    /out of the house! Socket as an Application Programming Interface! n Supports the creation of network applications (e.g., render a Web page)! Close the socket! ­ 12 ­! Servers Differ From Clients" Passive open! n

  11. Wireless Network Esercitazioni

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Wireless Network Esercitazioni Alessandro Villani avillani@science.unitn.it #12;WEP Cracking #12 (Nomina sunt consequentia rerum) quello di fornire sul canale wireless un livello di sicurezza equivalente

  12. Systematic wireless network coding

    E-Print Network [OSTI]

    Shrader, Brooke E.

    We present a systematic network coding strategy for cooperative communication, in which some nodes may replicate-and-forward packets in addition to sending random linear combinations of the packets. We argue that if this ...

  13. Wireless Network Esercitazioni

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Wireless Network Esercitazioni Alessandro Villani avillani@science.unitn.it #12;Wireless Router WRT54G LINKSYS #12;WRT54G È un router Wireless: 1 porta Ethernet verso la LAN esterna 4 porte Ethernet

  14. Optimization in Networks

    E-Print Network [OSTI]

    Adilson E. Motter; Zoltan Toroczkai

    2007-07-07

    The recent surge in the network modeling of complex systems has set the stage for a new era in the study of fundamental and applied aspects of optimization in collective behavior. This Focus Issue presents an extended view of the state of the art in this field and includes articles from a large variety of domains where optimization manifests itself, including physical, biological, social, and technological networked systems.

  15. Radiometric Correctionradiometric correction Radiometric correction is important to ensure that terrestrial variables retrieved from optical satellite sensor

    E-Print Network [OSTI]

    Coburn, Craig

    that terrestrial variables retrieved from optical satellite sensor systems are calibrated to a common physical--to the entrance aperture of the satellite sensor imaging Earth, with five main pathways and associated: Schematic of photon pathways from the sun to the entrance aperture of the satellite sensor: (1) direct solar

  16. The Tenet Architecture for Tiered Sensor Networks

    E-Print Network [OSTI]

    2006-01-01

    a sensor network architecture: Lowering the waistline. InJ. Hill et al. System architecture directions for networkThe Tenet Architecture for Tiered Sensor Networks Omprakash

  17. Misbehavior in a Neural Network Model

    E-Print Network [OSTI]

    Burgos, José E

    2015-01-01

    Rodríguez, E. (2007). Neural-network simulations of twodiscipline of will. Neural Networks, 19, 1153–1160. http://E. R. Staddon (Eds. ), Neural network models of conditioning

  18. Solos (Dice Game) and Conductor (Neural Network)

    E-Print Network [OSTI]

    Marquetti, Andre

    2015-01-01

    vice versa). Figure 6.1 Neural Network keyboard input styleamplitude, pitch-class, neural network key patterns dependconvergence with the neural network does not depend on the

  19. Detecting Network Vulnerabilities Through Graph Theoretical Methods

    E-Print Network [OSTI]

    2007-01-01

    Introduction The electric power grid network is susceptibleProblem We model electric power grid networks as undirectedlines in the electric power grid network. Because of the

  20. The Human Capital Ecosystem Underlying the PLA’s Network Weapons Development

    E-Print Network [OSTI]

    McREYNOLDS, Joe; RAGLAND, Leigh A.; CHANG, Amy

    2015-01-01

    activities) and grey-hat (hackers who engage in both legalcollaboration be- tween the hacker community and the PLA’searly generations of Chinese hackers have gone on to found

  1. An observation of a mutual event between two satellites of Uranus

    E-Print Network [OSTI]

    M. G. Hidas; A. A. Christou; T. M. Brown

    2007-11-13

    We present observations of the occultation of Umbriel by Oberon on 4 May, 2007. We believe this is the first observed mutual event between satellites of Uranus. Fitting a simple geometric model to the lightcurve, we measure the mid-event time with a precision of 4 seconds. We assume previously measured values for the albedos of the two satellites (Karkoschka 2001), and measure the impact parameter to be 500 +/- 80 km. These measurements are more precise than estimates based on current ephemerides for these satellites. Therefore observations of additional mutual events during the 2007-2008 Uranian equinox will provide improved estimates of their orbital and physical parameters.

  2. Preliminary materials assessment for the Satellite Power System (SPS)

    SciTech Connect (OSTI)

    Teeter, R.R.; Jamieson, W.M.

    1980-01-01

    Presently, there are two SPS reference design concepts (one using silicon solar cells; the other using gallium arsenide solar cells). A materials assessment of both systems was performed based on the materials lists set forth in the DOE/NASA SPS Reference System Report: Concept Development and Evaluation Program. This listing identified 22 materials (plus miscellaneous and organics) used in the SPS. Tracing the production processes for these 22 materials, a total demand for over 20 different bulk materials (copper, silicon, sulfuric acid, etc.) and nealy 30 raw materials (copper ore, sand, sulfur ore, etc.) was revealed. Assessment of these SPS material requirements produced a number of potential material supply problems. The more serious problems are those associated with the solar cell materials (gallium, gallium arsenide, sapphire, and solar grade silicon), and the graphite fiber required for the satellite structure and space construction facilities. In general, the gallium arsenide SPS option exhibits more serious problems than the silicon option, possibly because gallium arsenide technology is not as well developed as that for silicon. Results are presented and discussed in detail. (WHK)

  3. Network topology mapper

    DOE Patents [OSTI]

    Quist, Daniel A. (Los Alamos, NM); Gavrilov, Eugene M. (Los Alamos, NM); Fisk, Michael E. (Jemez, NM)

    2008-01-15

    A method enables the topology of an acyclic fully propagated network to be discovered. A list of switches that comprise the network is formed and the MAC address cache for each one of the switches is determined. For each pair of switches, from the MAC address caches the remaining switches that see the pair of switches are located. For each pair of switches the remaining switches are determined that see one of the pair of switches on a first port and the second one of the pair of switches on a second port. A list of insiders is formed for every pair of switches. It is determined whether the insider for each pair of switches is a graph edge and adjacent ones of the graph edges are determined. A symmetric adjacency matrix is formed from the graph edges to represent the topology of the data link network.

  4. Evolving Complex Networks: The Backbone of the Climate Network

    E-Print Network [OSTI]

    Maryland at College Park, University of

    · Network topology changes due to natural dynamics (internal, external) #12;#12;Strong El Nino event #12;Our

  5. Importance of satellite cells in recovery from eccentric contraction-induced muscle injury 

    E-Print Network [OSTI]

    Rathbone, Christopher Ronald

    2003-01-01

    The purpose of this study was to determine if the elimination of satellite cell proliferation with []-irradiation would inhibit normal force recovery following eccentric contraction-induced injury. Adult female ICR mice were implanted with a...

  6. Causal relationships between solar proton events and single event upsets for communication satellites

    E-Print Network [OSTI]

    Lohmeyer, Whitney Quinne

    In this work, we analyze a historical archive of single event upsets (SEUs) maintained by Inmarsat, one of the world's leading providers of global mobile satellite communications services. Inmarsat has operated its ...

  7. SEA SURFACE CURRENT FIELDS IN THE BALTIC SEA DERIVED FROM MULTI-SENSOR SATELLITE DATA

    E-Print Network [OSTI]

    Hamburg,.Universität

    -sensor, algae blooms, surface currents, optical flow ABSTRACT: Mesoscale dynamic sea surface features demonstrate the use of multi- sensor / multi-channel satellite images for the computation of mesoscale surface

  8. Compressed Air System Optimization Improves Production and saves energy at a Satellite Manufacturer

    SciTech Connect (OSTI)

    2002-05-01

    In 2001, a compressed air improvement project was implemented following an audit on the compressed air system at Boeing Satellite Systems (formerly Hughes Space & Communications Company) in Los Angeles, California.

  9. Virus vector gene inserts are stabilized in the presence of satellite panicum mosaic virus coat protein 

    E-Print Network [OSTI]

    Everett, Anthany Laurence

    2009-05-15

    The coat protein of satellite panicum mosaic virus (SPMV) was used to stabilize viral vector gene inserts in planta. A Potato virus X (PVX) vector carrying the SPMV capsid protein (CP) gene was successfully stabilized through three serial passages...

  10. In Vitro Secondary Structure of the Genomic RNA of Satellite Tobacco Mosaic Virus

    E-Print Network [OSTI]

    Williams, Loren

    . Athavale1. , J. Jared Gossett1,3. , Jessica C. Bowman2 , Nicholas V. Hud2 , Loren Dean Williams2 , Stephen, Hud NV, Williams LD, et al. (2013) In Vitro Secondary Structure of the Genomic RNA of Satellite

  11. The European Satellite Navigation Program : policy analysis and recommendations for the future

    E-Print Network [OSTI]

    Escudero San José, Laura

    2011-01-01

    The European Satellite Navigation Program is a case study that combines Technical / Public / Private aspects in an integrative way. Therefore, it is a sound case for a TPP thesis candidate. This thesis analyzes the European ...

  12. On the tidal radius of satellites on prograde and retrograde orbits

    E-Print Network [OSTI]

    Gajda, Grzegorz

    2015-01-01

    A tidal radius is a distance from a satellite orbiting in a host potential beyond which its material is stripped by the tidal force. We derive a revised expression for the tidal radius of a rotating satellite which properly takes into account the possibility of prograde and retrograde orbits of stars. Besides the eccentricity of the satellite orbit, the tidal radius depends also on the ratio of the satellite internal angular velocity to the orbital angular velocity. We compare our formula to the results of two $N$-body simulations of dwarf galaxies orbiting a Milky Way-like host on a prograde and retrograde orbit. The tidal radius for the retrograde case is larger than for the prograde. We introduce a kinematic radius separating stars still orbiting the dwarf galaxy from those already stripped and following the potential of the host galaxy. We find that the tidal radius matches very well the kinematic radius.

  13. Using satellite remote sensing to quantify woody cover and biomass across Africa 

    E-Print Network [OSTI]

    Mitchard, Edward Thomas Alexander

    2012-06-25

    The goal of quantifying the woody cover and biomass of tropical savannas, woodlands and forests using satellite data is becoming increasingly important, but limitations in current scientific understanding reduce the ...

  14. Development and analysis of a small satellite attitude determination and control system testbed

    E-Print Network [OSTI]

    Crowell, Corey Whitcomb

    2011-01-01

    Attitude Determination and Control Systems (ADCS) are critical to the operation of satellites that require attitude knowledge and/or attitude control to achieve mission success. Furthermore, ADCS systems only operate as ...

  15. Development of resource-constrained sensors and actuators for in-space satellite docking and servicing

    E-Print Network [OSTI]

    Miller, Duncan Lee

    2015-01-01

    Most satellites on-orbit today are not intended to physically approach or interact with other spacecraft. However, the robotic servicing of orbiting assets will be an economically desirable (and often scientifically ...

  16. Formaldehyde distribution over North America: Implications for satellite retrievals of formaldehyde columns and isoprene emission

    E-Print Network [OSTI]

    Jacob, Daniel J.

    Formaldehyde distribution over North America: Implications for satellite retrievals of formaldehyde; published 8 September 2006. [1] Formaldehyde (HCHO) columns measured from space provide constraints measurements. Citation: Millet, D. B., et al. (2006), Formaldehyde distribution over North America

  17. THE TRANSITING EXOPLANET SURVEY SATELLITE: SIMULATIONS OF PLANET DETECTIONS AND ASTROPHYSICAL FALSE POSITIVES

    E-Print Network [OSTI]

    Sullivan, Peter W.

    The Transiting Exoplanet Survey Satellite (TESS) is a NASA-sponsored Explorer mission that will perform a wide-field survey for planets that transit bright host stars. Here, we predict the properties of the transiting ...

  18. DIRECT NORMAL IRRADIANCE FOR CSP BASED ON SATELLITE IMAGES OF METEOSAT SECOND

    E-Print Network [OSTI]

    Heinemann, Detlev

    DIRECT NORMAL IRRADIANCE FOR CSP BASED ON SATELLITE IMAGES OF METEOSAT SECOND GENERATION A. Hammer1). As for concentrating solar power (CSP) the frequency distribution of DNI is of special importance, special attention

  19. Thermospheric density variations: Observability using precision satellite orbits and effects on orbit propagation

    E-Print Network [OSTI]

    Lechtenberg, Travis; McLaughlin, Craig A.; Locke, Travis; Krishna, Dhaval Mysore

    2013-01-28

    This paper examines atmospheric density estimated using precision orbit ephemerides (POE) from the CHAMP and GRACE satellites during short periods of greater atmospheric density variability. The results of the calibration ...

  20. Satellite investigations of ice-ocean interactions in the Amundsen Sea sector of West Antarctica 

    E-Print Network [OSTI]

    McMillan, Malcolm John

    2012-06-25

    This thesis analyses satellite-based radar data to improve our understanding of the interactions between the Antarctic Ice Sheet and the ocean in the Amundsen Sea Sector of West Antarctica. Over the last two decades, the ...

  1. Data management of geostationary communication satellite telemetry and correlation to space weather observations

    E-Print Network [OSTI]

    Lohmeyer, Whitney Quinne

    2013-01-01

    To understand and mitigate the effects of space weather on the performance of geostationary communications satellites, we analyze sixteen years of archived telemetry data from Inmarsat, the UK-based telecommunications ...

  2. Maximizing Static Network Lifetime of Wireless Broadcast Adhoc Networks

    E-Print Network [OSTI]

    Poovendran, Radha

    of the important applications of wireless static adhoc net- works includes wireless sensor networks. The technology- cast routing over wireless static adhoc network where host mobility is not involved. We define the lifetime of a network as the dura- tion of time until the first node failure due to battery depletion. We

  3. Tidal networks 2. Watershed delineation and comparative network morphology

    E-Print Network [OSTI]

    Fagherazzi, Sergio

    of three, we quantify various tidal network properties including common power law relationships which have common power law relationships quantified for terrestrial systems to tidal systems and use these analysesTidal networks 2. Watershed delineation and comparative network morphology Andrea Rinaldo,1 Sergio

  4. MMS: An Autonomic Network-Layer Foundation for Network Management

    E-Print Network [OSTI]

    Ng, T. S. Eugene

    secured, and/or suboptimal in performance. This paper presents the design and implementation of the Meta-Management1 MMS: An Autonomic Network-Layer Foundation for Network Management Hemant Gogineni, Albert Research §Rice University Abstract-- Networks cannot be managed without management plane communications

  5. Wireless sensor networks for measuring traffic

    E-Print Network [OSTI]

    Varaiya, Pravin

    Wireless sensor networks for measuring traffic University of California, Berkeley Sing Yiu Cheung, Sinem Coleri, and Pravin Varaiya 2 Outline · Traffic measurement · Wireless Sensor Networks · Vehicle wireless sensor networks compete? 7 Outline · Traffic measurement · Wireless Sensor Networks · Vehicle

  6. Cooperative Diversity Routing in Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Cooperative Diversity Routing in Wireless Networks Mostafa Dehghan and Majid Ghaderi Department routing, cooperative commu- nication, cooperative diversity, wireless networks. I. INTRODUCTION Energy efficiency is a challenging problem in wireless networks, especially in ad hoc and sensor networks, where

  7. Collaborative Firewalling in Wireless Networks Mahmoud Taghizadeh

    E-Print Network [OSTI]

    Liu, Alex X.

    Collaborative Firewalling in Wireless Networks Mahmoud Taghizadeh Department of ECE Michigan State elements to enforce access policies in computer networks. Open network architecture, shared wireless medium for wireless networks in which nodes collaboratively perform packet filtering to address resource squandering

  8. Network coding for speedup in switches

    E-Print Network [OSTI]

    Kim, MinJi, M. Eng. Massachusetts Institute of Technology

    2007-01-01

    Network coding, which allows mixing of data at intermediate network nodes, is known to increase the throughput of networks. In particular, it is known that linear network coding in a crossbar switch can sustain traffic ...

  9. Searching for 2D Spatial Network Holes 

    E-Print Network [OSTI]

    Reitsma, Femke; Engel, Shane

    2004-01-01

    Research involving different forms of networks, such as internet networks, social networks, and cellular networks, has increasingly become an important field of study. From this work, a variety of different scaling laws ...

  10. Towards secure multiresolution network coding

    E-Print Network [OSTI]

    Medard, Muriel

    Emerging practical schemes indicate that algebraic mixing of different packets by means of random linear network coding can increase the throughput and robustness of streaming services over wireless networks. However, ...

  11. Network coding for anonymous broadcast

    E-Print Network [OSTI]

    Sergeev, Ivan A

    2013-01-01

    This thesis explores the use of network coding for anonymous broadcast. Network coding, the technique of transmitting or storing mixtures of messages rather than individual messages, can provide anonymity with its mixing ...

  12. Intervention in gene regulatory networks 

    E-Print Network [OSTI]

    Choudhary, Ashish

    2006-10-30

    In recent years Boolean Networks (BN) and Probabilistic Boolean Networks (PBN) have become popular paradigms for modeling gene regulation. A PBN is a collection of BNs in which the gene state vector transitions according to the rules of one...

  13. The Future of Network Neutrality

    E-Print Network [OSTI]

    Guttentag, Mikhail

    2009-01-01

    Internet, “the fastest growing communications network in history, [The Internet is the most open network in history. We have towell as its history seen through two major ideas of Internet

  14. A software package for the graphical simulation of the Global Positioning System's satellite orbits 

    E-Print Network [OSTI]

    Martinez-Lopez, Eugenio

    1981-01-01

    A SOFTWARE PACKAGE FOR THE GRAPHICAL SIMULATION OF THE GLOBAL POSITIONING SYSTEM'S SATELLITE ORBITS A Thesis by EUGENIO MARTINEZ-LOPEZ Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE August 1981 Ma)or Subject: Electrical Engineering Copyright by Eugenio Martinez-Lopez, 1979 A SOFTWARE PACKAGE FOR THE GRAPHICAL SIMULATION OF THE GLOBAL POSITIONING SYSTEM&S SATELLITE ORBITS A Thesis by Eugenio...

  15. Interactions of tropical synoptic-scale features as viewed from satellite 

    E-Print Network [OSTI]

    Winton, Susan Elizabeth

    1991-01-01

    INTERACTIONS OF TROPICAL SYNOPTIC-SCALE FEATURES AS VIEWED FROM SATELLITE Thesis by SUSAN ELIZABETH WINTON Submitted to tbe Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1991 Major Subject: Meteorology INTERACTIONS QF TROPICAL SYNOPTIC-SCALE FEATURES AS VIEWED FROM SATELLITE A Thesis by SUSAN ELIZABETH WINTON Approved as to style and content by: James P. McGuirk (Chair of Committee...

  16. A synoptic-scale evaluation of cyclogenesis using satellite radiation data 

    E-Print Network [OSTI]

    Mills, Jerry Ray

    1976-01-01

    May 1976 Major Subject: Meteorology A SYNOPTIC-SCALE EVALUATION OF CYCLOGENESIS USING SATELLITE RADIATION DATA A Thesis by JERRY RAY MlLLS Approved as to style and content by: (Chairman of Committee) (Member) (Member) May 1976 440344... ABSTRACT A Synoptic-Scale Evaluation of Cyclogenesis Using Satellite Rad ia t ion Data. (May 1976) Jerry Ray Mills, B. S. , Texas A&M University Chairman of Advisory Committee: Dr. A. H. Thompson Through the study and evaluation of the formation...

  17. An investigation of extratropical cyclogenesis in the Gulf of Mexico using geosynchronous satellite information 

    E-Print Network [OSTI]

    Heckman, Brian Eugene

    1978-01-01

    AN INVESTIGATION OF EXTRATROPICAL CYCLOGENESIS IN 'IHE GULF OF MEXICO USlNG GEOSYNCHRONOUS SATELLITE INFORJ'JATION A Thesis by BRIAN EUGENF. HECKMAN Submitted to the Graduate College of Texas AAJ! University in partial fulfillment... of the requirement for the u . gree of MASTER OF SCIENCE May 1978 Major Subject: FJeteorology AN INVESTIGATION OF EXTHATROPICAL CYCLOGENESIS IN TYE GULF OF NEXICO USING GEOSYNCNRONOUS SATELLITE INFORMATION A Thesis by BRIAIS EUGENE HECKNAN Approved...

  18. Digital meteorological radar data compared with digital infrared data from a geostationary meteorological satellite 

    E-Print Network [OSTI]

    Henderson, Rodney Stuart

    1979-01-01

    DIGITAL METEOROLOGICAL RADAR DATA COMPARED WITH DIGITAL INFRARED DATA FROM A GEOSTATIONARY METEOROLOGICAL SATELLITE A Thesis by RODNEY STUART HENDFRSON Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirement for the degree of MASTER OF SCIFNCE May I979 Ma jor Subject: Meteorology DIGITAL METEOROLOGICAL RADAR DATA COMPARED WITH DIGITAL INFRARED DATA FROM A GEOSTATIONAFY METEOROLOGICAL SATELLITE A Thesis by RODNEY STUART HENDERSON Approved...

  19. Time changes in a subtropical cloud and weather system as revealed by meteorological satellite data 

    E-Print Network [OSTI]

    Randerson, Darryl

    1962-01-01

    TIME CHANGES IN A SUBTROPICAL CLOUD AND WEATHER SYSTEM AS REVEALED BY METEOROLOGICAL SATELLITE DATA A Thesis By DARRYL RANDERSON Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 1962 Ma)or Sub]ect: METEOROLOGY TIME CHANGES IN A SUBTROPICAL CLOUD AND WEATHER SYSTEM AS REVEALED BY METEOROLOGICAL SATELLITE DATA A Thesis By DARRYL RANDERSON Approved as to style and content by...

  20. Comparisons between Nimbus 6 satellite and rawinsonde soundings for several geographical areas 

    E-Print Network [OSTI]

    Chou, Nine-Min

    1979-01-01

    COMPARISONS BETWEEN NIMBUS 6 SATELLITE AND RAWINSONDE SOUNDINGS FOR SEVERAL GEOGRAPHICAL AREAS A Thesis by NINE-MIN CHOU Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE May 1979 Major Subject: Meteorology COMPARISONS BETWEEN NIMBUS 6 SATELLITE AND RAWINSONDE SOUNDINGS FOR SEVERAL GEOGRAPHICAL AREAS A Thesis by NINE-MIN CHOU Approved as to style and content by: (Chairman of Committee) (Member...

  1. ASCR Science Network Requirements

    SciTech Connect (OSTI)

    Dart, Eli; Tierney, Brian

    2009-08-24

    The Energy Sciences Network (ESnet) is the primary provider of network connectivity for the US Department of Energy Office of Science, the single largest supporter of basic research in the physical sciences in the United States. In support of the Office of Science programs, ESnet regularly updates and refreshes its understanding of the networking requirements of the instruments, facilities, scientists, and science programs that it serves. This focus has helped ESnet to be a highly successful enabler of scientific discovery for over 20 years. In April 2009 ESnet and the Office of Advanced Scientific Computing Research (ASCR), of the DOE Office of Science, organized a workshop to characterize the networking requirements of the programs funded by ASCR. The ASCR facilities anticipate significant increases in wide area bandwidth utilization, driven largely by the increased capabilities of computational resources and the wide scope of collaboration that is a hallmark of modern science. Many scientists move data sets between facilities for analysis, and in some cases (for example the Earth System Grid and the Open Science Grid), data distribution is an essential component of the use of ASCR facilities by scientists. Due to the projected growth in wide area data transfer needs, the ASCR supercomputer centers all expect to deploy and use 100 Gigabit per second networking technology for wide area connectivity as soon as that deployment is financially feasible. In addition to the network connectivity that ESnet provides, the ESnet Collaboration Services (ECS) are critical to several science communities. ESnet identity and trust services, such as the DOEGrids certificate authority, are widely used both by the supercomputer centers and by collaborations such as Open Science Grid (OSG) and the Earth System Grid (ESG). Ease of use is a key determinant of the scientific utility of network-based services. Therefore, a key enabling aspect for scientists beneficial use of high performance networks is a consistent, widely deployed, well-maintained toolset that is optimized for wide area, high-speed data transfer (e.g. GridFTP) that allows scientists to easily utilize the services and capabilities that the network provides. Network test and measurement is an important part of ensuring that these tools and network services are functioning correctly. One example of a tool in this area is the recently developed perfSONAR, which has already shown its usefulness in fault diagnosis during the recent deployment of high-performance data movers at NERSC and ORNL. On the other hand, it is clear that there is significant work to be done in the area of authentication and access control - there are currently compatibility problems and differing requirements between the authentication systems in use at different facilities, and the policies and mechanisms in use at different facilities are sometimes in conflict. Finally, long-term software maintenance was of concern for many attendees. Scientists rely heavily on a large deployed base of software that does not have secure programmatic funding. Software packages for which this is true include data transfer tools such as GridFTP as well as identity management and other software infrastructure that forms a critical part of the Open Science Grid and the Earth System Grid.

  2. Spectral Decomposition of Signaling Networks

    E-Print Network [OSTI]

    2006-01-01

    expressed. Signaling networks modeled as Petri nets are onenetwork. Although the results are limited to the Petri net

  3. Optimal synchronization of complex networks

    E-Print Network [OSTI]

    Per Sebastian Skardal; Dane Taylor; Jie Sun

    2014-10-17

    We study optimal synchronization in networks of heterogeneous phase oscillators. Our main result is the derivation of a synchrony alignment function that encodes the interplay between network structure and oscillators' frequencies and can be readily optimized. We highlight its utility in two general problems: constrained frequency allocation and network design. In general, we find that synchronization is promoted by strong alignments between frequencies and the dominant Laplacian eigenvectors, as well as a matching between the heterogeneity of frequencies and network structure.

  4. Outer irregular satellites of the planets and their relationship with asteroids, comets and Kuiper Belt objects

    E-Print Network [OSTI]

    Scott S. Sheppard

    2006-05-01

    Outer satellites of the planets have distant, eccentric orbits that can be highly inclined or even retrograde relative to the equatorial planes of their planets. These irregular orbits cannot have formed by circumplanetary accretion and are likely products of early capture from heliocentric orbit. The irregular satellites may be the only small bodies remaining which are still relatively near their formation locations within the giant planet region. The study of the irregular satellites provides a unique window on processes operating in the young solar system and allows us to probe possible planet formation mechanisms and the composition of the solar nebula between the rocky objects in the main asteroid belt and the very volatile rich objects in the Kuiper Belt. The gas and ice giant planets all appear to have very similar irregular satellite systems irrespective of their mass or formation timescales and mechanisms. Water ice has been detected on some of the outer satellites of Saturn and Neptune whereas none has been observed on Jupiter's outer satellites.

  5. Satellite Dwarf Galaxies in a Hierarchical Universe: Infall Histories, Group Preprocessing, and Reionization

    E-Print Network [OSTI]

    Wetzel, Andrew R; Garrison-Kimmel, Shea

    2015-01-01

    In the Local Group, almost all satellite dwarf galaxies that are within the virial radius of the Milky Way (MW) and M31 exhibit strong environmental influence. The orbital histories of these satellites provide the key to understanding the role of the MW/M31 halo, lower-mass groups, and cosmic reionization on the evolution of dwarf galaxies. We examine the virial-infall histories of satellites with M_star = 10 ^ {3 - 9} M_sun using the ELVIS suite of cosmological zoom-in dissipationless simulations of 48 MW/M31-like halos. Satellites at z = 0 fell into the MW/M31 halos typically 5 - 8 Gyr ago at z = 0.5 - 1. However, they first fell into any host halo typically 7 - 10 Gyr ago at z = 0.7 - 1.5. This difference arises because many satellites experienced "group preprocessing" in another host halo, typically of M_vir ~ 10 ^ {10 - 12} M_sun, before falling into the MW/M31 halos. Satellites with lower-mass and/or those closer to the MW/M31 fell in earlier and are more likely to have experienced group preprocessing; ...

  6. Satellites of LMCs: Close Friendships Ruined by Milky Way Mass Halos

    E-Print Network [OSTI]

    Deason, Alis J; Garrison-Kimmel, Shea; Belokurov, Vasily

    2015-01-01

    Motivated by the recent discovery of several dwarf galaxies near the Large Magellanic Cloud (LMC), we study the accretion of massive satellites onto Milky Way (MW)/M31-like halos using the ELVIS suite of N-body simulations. We identify 25 surviving subhalos near the expected mass of the LMC, and investigate the lower-mass satellites that were associated with these subhalos before they fell into the MW/M31 halos. Typically, 7% of the overall z=0 satellite population of MW/M31 halos were in a surviving LMC-group prior to falling into the MW/M31 halo. This fraction, however, can vary between 1% and 25%, being higher for groups with higher-mass and/or more recent infall times. Groups of satellites disperse rapidly in phase space after infall, and their distances and velocities relative to the group center become statistically similar to the overall satellite population after 4-8 Gyr. We quantify the likelihood that satellites were associated with an LMC-mass group as a function of both distance and velocity relat...

  7. Estimating global and North American methane emissions with high spatial resolution using GOSAT satellite data

    SciTech Connect (OSTI)

    Turner, A. J. [Harvard Univ., Cambridge, MA (United States); Jacob, D. J. [Harvard Univ., Cambridge, MA (United States); Wecht, K. J. [National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States). Earth System Research Lab.; Maasakkers, J. D. [Harvard Univ., Cambridge, MA (United States); Lundgren, E. [Harvard Univ., Cambridge, MA (United States); Andrews, A. E. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Biraud, S. C. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)] (ORCID:000000017697933X); Boesch, H. [Univ. of Leicester (United Kingdom); Bowman, K. W. [California Inst. of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab.; Deutscher, N. M. [Univ. of Wollongong, NSW (Australia); Dubey, M. K. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Griffith, D. W. T. [Univ. of Wollongong, NSW (Australia); Hase, F. [Karlsruhe Inst. of Technology (KIT) (Germany). IMK-ASF; Kuze, A. [Japan Aerospace Exploration Agency, Tsukuba (Japan)] (ORCID:0000000154153377); Notholt, J. [Univ. of Bremen (Germany); Ohyama, H. [Japan Aerospace Exploration Agency, Tsukuba (Japan); Parker, R. [Univ. of Leicester (United Kingdom); Payne, V. H. [California Inst. of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab.; Sussmann, R. [Karlsruhe Inst. of Technology (KIT) Garmisch-Partenkirchen (Germany). IMK-IFU; Sweeney, C. [Karlsruhe Inst. of Technology (KIT) Garmisch-Partenkirchen (Germany). IMK-IFU; Velazco, V. A. [Univ. of Wollongong, NSW (Australia)] (ORCID:000000021376438X); Warneke, T. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Wennberg, P. O. [California Inst. of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab.; Wunch, D. [Pasadena, CA (United States). Jet Propulsion Lab.

    2015-01-01

    We use 2009–2011 space-borne methane observations from the Greenhouse Gases Observing SATellite (GOSAT) to estimate global and North American methane emissions with 4° × 5° and up to 50 km × 50 km spatial resolution, respectively. GEOS-Chem and GOSAT data are first evaluated with atmospheric methane observations from surface and tower networks (NOAA/ESRL, TCCON) and aircraft (NOAA/ESRL, HIPPO), using the GEOS-Chem chemical transport model as a platform to facilitate comparison of GOSAT with in situ data. This identifies a high-latitude bias between the GOSAT data and GEOS-Chem that we correct via quadratic regression. Our global adjoint-based inversion yields a total methane source of 539 Tg a?1 with some important regional corrections to the EDGARv4.2 inventory used as a prior. Results serve as dynamic boundary conditions for an analytical inversion of North American methane emissions using radial basis functions to achieve high resolution of large sources and provide error characterization. We infer a US anthropogenic methane source of 40.2–42.7 Tg a-1, as compared to 24.9–27.0 Tg a-1 in the EDGAR and EPA bottom-up inventories, and 30.0–44.5 Tg a-1 in recent inverse studies. Our estimate is supported by independent surface and aircraft data and by previous inverse studies for California. We find that the emissions are highest in the southern–central US, the Central Valley of California, and Florida wetlands; large isolated point sources such as the US Four Corners also contribute. Using prior information on source locations, we attribute 29–44 % of US anthropogenic methane emissions to livestock, 22–31 % to oil/gas, 20 % to landfills/wastewater, and 11–15 % to coal. Wetlands contribute an additional 9.0–10.1 Tg a-1.

  8. Network Operating Systems Partha Dasgupta

    E-Print Network [OSTI]

    Dasgupta, Partha

    Network Operating Systems Partha Dasgupta Department of Computer Science and Engineering Arizona of Electrical Engineering] 1. Introduction Network Operating Systems extend the facilities and services provided by computer operating systems to support a set of computers, connected by a network. The environment managed

  9. Radu Calin Dimitriu NEURAL NETWORKS,

    E-Print Network [OSTI]

    Cambridge, University of

    Radu Calin Dimitriu NEURAL NETWORKS, TRICKS OF THE TRADE #12;BEFORE STARTING THE TRAINING A DATABASE FOR A NEURAL NETWORK THIS WILL ENSURE SUFFICIENT DATA AND VARIABLES TO CAPTURE THE COMPLEXITY IN THE DATABASE IF YOU DO NOT KNOW HOW THEY ARE RELATED TO THE OUTPUT, THE NEURAL NETWORK MAY NEVERTHELESS

  10. Symbolic Representation of Neural Networks

    E-Print Network [OSTI]

    Liu, Huan

    Draft Symbolic Representation of Neural Networks Rudy Setiono and Huan Liu Department,liuhg@iscs.nus.sg Abstract Although backpropagation neural networks generally predict better than decision trees do is needed by human experts. This work drives a sym­ bolic representation for neural networks to make

  11. Parallel HSL port Control Network

    E-Print Network [OSTI]

    Glück, Olivier

    Parallel HSL port FastHSL board HSL links Ethernet Control Network Node 1 PC mother board PCI Bus PCI-DDC Rcube PC mother board Node 3 PCI-DDC Rcube Node 2 PC mother board PCI-DDC Rcube THE MPC is the HSL network router, and PCI-DDC the network controller implementing the Direct Deposit State Less

  12. High Energy Physics and Nuclear Physics Network Requirements

    E-Print Network [OSTI]

    Dart, Eli

    2014-01-01

    The AMS (Alpha Magnetic Spectrometer) is a satellite-basedProtocol Alpha Magnetic Spectrometer Argonne National

  13. Broadband Satellite Network: TCP/IP Performance Analysis Sastri Kota, Mukul Goyal, Rohit Goyal and Raj Jain

    E-Print Network [OSTI]

    Jain, Raj

    -band frequencies: Adaptive Power Control and Adaptive Coding:Adaptive power control and adaptive coding GHz band and high power transistors operating in the 30 GHz band have influenced the development of low cost earth terminals. Space qualified higher efficiency traveling-wave tubes (TWTAs) and ASICs

  14. Performance of TCP over ABR with Long-Range Dependent VBR Background Traffic over Terrestrial and Satellite ATM networks

    E-Print Network [OSTI]

    Jain, Raj

    State University Department of Computer and Information Science Columbus, OH 43210-1277 E MPEG-2 video sources traffic. The actual traffic for the model is generated using fast-fourier transform of the fractional gaussian noise sequence. Our model of com- pressed video sources bears

  15. Green Networking Basem Shihada

    E-Print Network [OSTI]

    Shihada, Basem

    ;Computing and Networking Trends Bell's Law*: Every decade sees a change in the class of computing devices in the cloud. * Bells Law of Computer Classes formulated by Gordon Bell in 1972, describes how types connectivity and load will fluctuate rapidly, both in space and time. #12;ICT Energy Consumption Trends

  16. Transactional Network Platform: Applications

    SciTech Connect (OSTI)

    Katipamula, Srinivas; Lutes, Robert G.; Ngo, Hung; Underhill, Ronald M.

    2013-10-31

    In FY13, Pacific Northwest National Laboratory (PNNL) with funding from the Department of Energy’s (DOE’s) Building Technologies Office (BTO) designed, prototyped and tested a transactional network platform to support energy, operational and financial transactions between any networked entities (equipment, organizations, buildings, grid, etc.). Initially, in FY13, the concept demonstrated transactions between packaged rooftop air conditioners and heat pump units (RTUs) and the electric grid using applications or "agents" that reside on the platform, on the equipment, on a local building controller or in the Cloud. The transactional network project is a multi-lab effort with Oakridge National Laboratory (ORNL) and Lawrence Berkeley National Laboratory (LBNL) also contributing to the effort. PNNL coordinated the project and also was responsible for the development of the transactional network (TN) platform and three different applications associated with RTUs. This document describes two applications or "agents" in details, and also summarizes the platform. The TN platform details are described in another companion document.

  17. Jamming in Hierarchical Networks

    E-Print Network [OSTI]

    Xiang Cheng; Stefan Boettcher

    2014-09-29

    We study the Biroli-Mezard model for lattice glasses on a number of hierarchical networks. These networks combine certain lattice-like features with a recursive structure that makes them suitable for exact renormalization group studies. In our numerical simulations here, we first explore their equilibrium properties with the Wang-Landau algorithm. Then, we investigate their dynamical behavior using a grand-canonical annealing algorithm. We find that the dynamics readily falls out of equilibrium and jams in many of our networks with certain constraints on the neighborhood occupation imposed by the Biroli-Mezard model, even in cases where exact results indicate that no ideal glass transition exists. But while we find that time-scales for the jams diverge, our simulations can not ascertain such a divergence for a packing fraction that would distinctly above random close packing. In cases where we allow hopping in our dynamical simulations, the jams on these networks generally disappear, in contrast to what has been found in lattices simulations previously.

  18. Caching in wireless networks

    E-Print Network [OSTI]

    Niesen, Urs

    We consider the problem of delivering content cached in a wireless network of n nodes randomly located on a square of area n. In the most general form, this can be analyzed by considering the 2[superscript n] timesn-dimensional ...

  19. Microsystem process networks

    DOE Patents [OSTI]

    Wegeng, Robert S [Richland, WA; TeGrotenhuis, Ward E [Kennewick, WA; Whyatt, Greg A [West Richland, WA

    2010-01-26

    Various aspects and applications or microsystem process networks are described. The design of many types of microsystems can be improved by ortho-cascading mass, heat, or other unit process operations. Microsystems having energetically efficient microchannel heat exchangers are also described. Detailed descriptions of numerous design features in microcomponent systems are also provided.

  20. Microsystem process networks

    DOE Patents [OSTI]

    Wegeng, Robert S. (Richland, WA); TeGrotenhuis, Ward E. (Kennewick, WA); Whyatt, Greg A. (West Richland, WA)

    2007-09-18

    Various aspects and applications of microsystem process networks are described. The design of many types of Microsystems can be improved by ortho-cascading mass, heat, or other unit process operations. Microsystems having energetically efficient microchannel heat exchangers are also described. Detailed descriptions of numerous design features in microcomponent systems are also provided.

  1. Microsystem process networks

    DOE Patents [OSTI]

    Wegeng, Robert S. (Richland, WA); TeGrotenhuis, Ward E. (Kennewick, WA); Whyatt, Greg A. (West Richland, WA)

    2006-10-24

    Various aspects and applications of microsystem process networks are described. The design of many types of microsystems can be improved by ortho-cascading mass, heat, or other unit process operations. Microsystems having exergetically efficient microchannel heat exchangers are also described. Detailed descriptions of numerous design features in microcomponent systems are also provided.

  2. Essays on Network Formation 

    E-Print Network [OSTI]

    Mueller, William Graham

    2012-10-19

    are examined and I determine what networks, if any, each model may converge to in the limit. The long-run behavior of each model is examined through the use of simulations and compared to one another. I find that amount and type of information agents have...

  3. Wireless Network Esercitazioni

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Wireless Network Esercitazioni Alessandro Villani avillani@science.unitn.it #12;Reti Ad Hoc #12;Reti Ad Hoc (IBSS) Tipicamente le wireless LANs che conosciamo utilizzano la modalità "infrastrutturata Hoc (IBSS) La modalità Ad Hoc permette agli utenti di costituire una wireless LAN autonomamente

  4. Wireless Network Esercitazioni

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Wireless Network Esercitazioni Alessandro Villani avillani@science.unitn.it #12;Configurazione AP sito CISCO: http://www.cisco.com/public/sw-center/sw- wireless.shtml La versione attuale è: c1200-k9w7;AP 1200: Configurazione Wireless Ruolo in una rete Wireless: Root o repeater Speed: Basic: traffico

  5. Resilience of Networks Formed of Interdependent Modular Networks

    E-Print Network [OSTI]

    Shekhtman, Louis; Havlin, Shlomo

    2015-01-01

    Many infrastructure networks have a modular structure and are also interdependent. While significant research has explored the resilience of interdependent networks, there has been no analysis of the effects of modularity. Here we develop a theoretical framework for attacks on interdependent modular networks and support our results by simulations. We focus on the case where each network has the same number of communities and the dependency links are restricted to be between pairs of communities of different networks. This is very realistic for infrastructure across cities. Each city has its own infrastructures and different infrastructures are dependent within the city. However, each infrastructure is connected within and between cities. For example, a power grid will connect many cities as will a communication network, yet a power station and communication tower that are interdependent will likely be in the same city. It has been shown that single networks are very susceptible to the failure of the interconn...

  6. THE DISTRIBUTION OF FAINT SATELLITES AROUND CENTRAL GALAXIES IN THE CANADA-FRANCE-HAWAII TELESCOPE LEGACY SURVEY

    SciTech Connect (OSTI)

    Jiang, C. Y.; Jing, Y. P.; Li, Cheng

    2012-11-20

    We investigate the radial number density profile and the abundance distribution of faint satellites around central galaxies in the low-redshift universe using the Canada-France-Hawaii Telescope (CFHT) Legacy Survey. We consider three samples of central galaxies with magnitudes of M {sub r} = -21, -22, and -23 selected from the Sloan Digital Sky Survey group catalog of Yang et al. The satellite distribution around these central galaxies is obtained by cross-correlating these galaxies with the photometric catalog of the CFHT Legacy Survey. The projected radial number density of the satellites obeys a power-law form with the best-fit logarithmic slope of -1.05, independent of both the central galaxy luminosity and the satellite luminosity. The projected cross-correlation function between central and satellite galaxies exhibits a non-monotonic trend with satellite luminosity. It is most pronounced for central galaxies with M {sub r} = -21, where the decreasing trend of clustering amplitude with satellite luminosity is reversed when satellites are fainter than central galaxies by more than 2 mag. A comparison with the satellite luminosity functions in the Milky Way (MW) and M31 shows that the MW/M31 system has about twice as many satellites as around a typical central galaxy of similar luminosity. The implications for theoretical models are briefly discussed.

  7. Green Networks: Energy Efficient Design for Optical Networks Balagangadhar G. Bathula, Jaafar M. H. Elmirghani

    E-Print Network [OSTI]

    Bathula, Balagangadhar G

    Green Networks: Energy Efficient Design for Optical Networks Balagangadhar G. Bathula, Jaafar M. H in backbone networks such as optical networks increase. Energy consumption of optical networks is an important the energy consumption of optical networks. We propose sleep cycle protocols for use in the network nodes

  8. Helper's Network Gazette March 1994 

    E-Print Network [OSTI]

    1994-01-01

    Darlene Sullivan also notes that Steven McHattie (Gabriel) has an upcoming film offered for distribution: it's a canadian SF movie called The Dark, and it sounds interesting: "A cop and a scientist battle to control a dark force." In addition to now... satellite which will allow them to air the series at a more reasonable time for the west coast than they're able to now, with only the one satellite. B&B Scripts for Sale From Judith Marietta comes news of a place, Script City, which has for sale scripts...

  9. Determination of Large-Scale Cloud Ice Water Concentration by Combining Surface Radar and Satellite Data in Support of ARM SCM Activities

    SciTech Connect (OSTI)

    Liu, Guosheng

    2013-03-15

    Single-column modeling (SCM) is one of the key elements of Atmospheric Radiation Measurement (ARM) research initiatives for the development and testing of various physical parameterizations to be used in general circulation models (GCMs). The data required for use with an SCM include observed vertical profiles of temperature, water vapor, and condensed water, as well as the large-scale vertical motion and tendencies of temperature, water vapor, and condensed water due to horizontal advection. Surface-based measurements operated at ARM sites and upper-air sounding networks supply most of the required variables for model inputs, but do not provide the horizontal advection term of condensed water. Since surface cloud radar and microwave radiometer observations at ARM sites are single-point measurements, they can provide the amount of condensed water at the location of observation sites, but not a horizontal distribution of condensed water contents. Consequently, observational data for the large-scale advection tendencies of condensed water have not been available to the ARM cloud modeling community based on surface observations alone. This lack of advection data of water condensate could cause large uncertainties in SCM simulations. Additionally, to evaluate GCMsâ�� cloud physical parameterization, we need to compare GCM results with observed cloud water amounts over a scale that is large enough to be comparable to what a GCM grid represents. To this end, the point-measurements at ARM surface sites are again not adequate. Therefore, cloud water observations over a large area are needed. The main goal of this project is to retrieve ice water contents over an area of 10 x 10 deg. surrounding the ARM sites by combining surface and satellite observations. Built on the progress made during previous ARM research, we have conducted the retrievals of 3-dimensional ice water content by combining surface radar/radiometer and satellite measurements, and have produced 3-D cloud ice water contents in support of cloud modeling activities. The approach of the study is to expand a (surface) point measurement to an (satellite) area measurement. That is, the study takes the advantage of the high quality cloud measurements (particularly cloud radar and microwave radiometer measurements) at the point of the ARM sites. We use the cloud ice water characteristics derived from the point measurement to guide/constrain a satellite retrieval algorithm, then use the satellite algorithm to derive the 3-D cloud ice water distributions within an 10�° (latitude) x 10�° (longitude) area. During the research period, we have developed, validated and improved our cloud ice water retrievals, and have produced and archived at ARM website as a PI-product of the 3-D cloud ice water contents using combined satellite high-frequency microwave and surface radar observations for SGP March 2000 IOP and TWP-ICE 2006 IOP over 10 deg. x 10 deg. area centered at ARM SGP central facility and Darwin sites. We have also worked on validation of the 3-D ice water product by CloudSat data, synergy with visible/infrared cloud ice water retrievals for better results at low ice water conditions, and created a long-term (several years) of ice water climatology in 10 x 10 deg. area of ARM SGP and TWP sites and then compared it with GCMs.

  10. Operations Research and the Captivating Study of Networks

    E-Print Network [OSTI]

    Nagurney, Anna

    Paradox and Evolutionary Variational Inequalities · A New Network Performance/Efficiency Measure Networks Duke Energy Gas Pipeline Network Transportation, Communication, and Energy Networks #12;Components of Networks · The Transportation Network Equilibriumn Problem and Methodological Tools · The Braess Paradox

  11. Tensor Network Renormalization

    E-Print Network [OSTI]

    Glen Evenbly; Guifre Vidal

    2015-04-21

    We introduce a coarse-graining transformation for tensor networks that can be applied to study both the partition function of a classical statistical system and the Euclidean path integral of a quantum many-body system. The scheme is based upon the insertion of optimized unitary and isometric tensors (disentanglers and isometries) into the tensor network and has, as its key feature, the ability to remove short-range entanglement/correlations at each coarse-graining step. Removal of short-range entanglement results in scale invariance being explicitly recovered at criticality. In this way we obtain a proper renormalization group flow (in the space of tensors), one that in particular (i) is computationally sustainable, even for critical systems, and (ii) has the correct structure of fixed points, both at criticality and away from it. We demonstrate the proposed approach in the context of the 2D classical Ising model.

  12. Rheology of fractal networks

    E-Print Network [OSTI]

    Pedro Patricio; Catarina R. Leal; Jorge Duarte; Cristina Januario

    2015-08-03

    We model the cytoskeleton as a fractal network by identifying each segment with a simple Kelvin-Voigt element, with a well defined equilibrium length. The final structure retains the elastic characteristics of a solid or a gel, which may support stress, without relaxing. By considering a very simple regular self-similar structure of segments in series and in parallel, in 1, 2 or 3 dimensions, we are able to express the viscoelasticity of the network as an effective generalised Kelvin-Voigt model with a power law spectrum of retardation times, $\\cal L\\sim\\tau^{\\alpha}$. We relate the parameter $\\alpha$ with the fractal dimension of the gel. In some regimes ($0power law behaviours of the elastic and viscous moduli with the angular frequencies, $G'\\sim G''\\sim w^\\alpha$, that occur in a variety of soft materials, including living cells. In other regimes, we find different power laws for $G'$ and $G''$.

  13. Modular sensor network node

    DOE Patents [OSTI]

    Davis, Jesse Harper Zehring (Berkeley, CA); Stark, Jr., Douglas Paul (Tracy, CA); Kershaw, Christopher Patrick (Hayward, CA); Kyker, Ronald Dean (Livermore, CA)

    2008-06-10

    A distributed wireless sensor network node is disclosed. The wireless sensor network node includes a plurality of sensor modules coupled to a system bus and configured to sense a parameter. The parameter may be an object, an event or any other parameter. The node collects data representative of the parameter. The node also includes a communication module coupled to the system bus and configured to allow the node to communicate with other nodes. The node also includes a processing module coupled to the system bus and adapted to receive the data from the sensor module and operable to analyze the data. The node also includes a power module connected to the system bus and operable to generate a regulated voltage.

  14. Transactional Network Overview

    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 RankADVANCEDInstallers/ContractorsPhotovoltaicsState ofSavings forTitleJuly 2012PumpingTransactional Network

  15. Aerosol indirect effects -- general circulation model intercomparison and evaluation with satellite data

    SciTech Connect (OSTI)

    Quaas, Johannes; Ming, Yi; Menon, Surabi; Takemura, Toshihiko; Wang, Minghuai; Penner, Joyce E.; Gettelman, Andrew; Lohmann, Ulrike; Bellouin, Nicolas; Boucher, Olivier; Sayer, Andrew M.; Thomas, Gareth E.; McComiskey, Allison; Feingold, Graham; Hoose, Corinna; Kristjansson, Jon Egill; Liu, Xiaohong; Balkanski, Yves; Donner, Leo J.; Ginoux, Paul A.; Stier, Philip; Feichter, Johann; Sednev, Igor; Bauer, Susanne E.; Koch, Dorothy; Grainger, Roy G.; Kirkevag, Alf; Iversen, Trond; Seland, Oyvind; Easter, Richard; Ghan, Steven J.; Rasch, Philip J.; Morrison, Hugh; Lamarque, Jean-Francois; Iacono, Michael J.; Kinne, Stefan; Schulz, Michael

    2009-04-10

    Aerosol indirect effects continue to constitute one of the most important uncertainties for anthropogenic climate perturbations. Within the international AEROCOM initiative, the representation of aerosol-cloud-radiation interactions in ten different general circulation models (GCMs) is evaluated using three satellite datasets. The focus is on stratiform liquid water clouds since most GCMs do not include ice nucleation effects, and none of the model explicitly parameterizes aerosol effects on convective clouds. We compute statistical relationships between aerosol optical depth (Ta) and various cloud and radiation quantities in a manner that is consistent between the models and the satellite data. It is found that the model-simulated influence of aerosols on cloud droplet number concentration (Nd) compares relatively well to the satellite data at least over the ocean. The relationship between Ta and liquid water path is simulated much too strongly by the models. It is shown that this is partly related to the representation of the second aerosol indirect effect in terms of autoconversion. A positive relationship between total cloud fraction (fcld) and Ta as found in the satellite data is simulated by the majority of the models, albeit less strongly than that in the satellite data in most of them. In a discussion of the hypotheses proposed in the literature to explain the satellite-derived strong fcld - Ta relationship, our results indicate that none can be identified as unique explanation. Relationships similar to the ones found in satellite data between Ta and cloud top temperature or outgoing long-wave radiation (OLR) are simulated by only a few GCMs. The GCMs that simulate a negative OLR - Ta relationship show a strong positive correlation between Ta and fcld The short-wave total aerosol radiative forcing as simulated by the GCMs is strongly influenced by the simulated anthropogenic fraction of Ta, and parameterisation assumptions such as a lower bound on Nd. Nevertheless, the strengths of the statistical relationships are good predictors for the aerosol forcings in the models. An estimate of the total short-wave aerosol forcing inferred from the combination of these predictors for the modelled forcings with the satellite-derived statistical relationships yields a global annual mean value of -1.5+-0.5 Wm-2. An alternative estimate obtained by scaling the simulated clear- and cloudy-sky forcings with estimates of anthropogenic Ta and satellite-retrieved Nd - Ta regression slopes, respectively, yields a global annual mean clear-sky (aerosol direct effect) estimate of -0.4+-0.2 Wm-2 and a cloudy-sky (aerosol indirect effect) estimate of -0.7+-0.5 Wm-2, with a total estimate of -1.2+-0.4 Wm-2.

  16. Rheology of fractal networks

    E-Print Network [OSTI]

    Patricio, Pedro; Duarte, Jorge; Januario, Cristina

    2015-01-01

    We investigate the rheology of a fractal network, in the framework of the linear theory of viscoelasticity. We identify each segment of the network with a simple Kelvin-Voigt element, with a well defined equilibrium length. The final structure retains the elastic characteristics of a solid or a gel. By considering a very simple regular self-similar structure of segments in series and in parallel, in 1, 2 or 3 dimensions, we are able to express the viscoelasticity of the network as an effective generalised Kelvin-Voigt model with a power law spectrum of retardation times, $\\phi\\sim\\tau^{\\alpha-1}$. We relate the parameter $\\alpha$ with the fractal dimension of the gel. In some regimes ($0power law behaviours of the elastic and viscous moduli with the angular frequencies, $G'\\sim G''\\sim w^\\alpha$, that occur in a variety of soft materials, including living cells. In other regimes, we find different and interesting power laws for $G'$ and $G''$.

  17. Insecurity of Wireless Networks

    SciTech Connect (OSTI)

    Sheldon, Frederick T; Weber, John Mark; Yoo, Seong-Moo; Pan, W. David

    2012-01-01

    Wireless is a powerful core technology enabling our global digital infrastructure. Wi-Fi networks are susceptible to attacks on Wired Equivalency Privacy, Wi-Fi Protected Access (WPA), and WPA2. These attack signatures can be profiled into a system that defends against such attacks on the basis of their inherent characteristics. Wi-Fi is the standard protocol for wireless networks used extensively in US critical infrastructures. Since the Wired Equivalency Privacy (WEP) security protocol was broken, the Wi-Fi Protected Access (WPA) protocol has been considered the secure alternative compatible with hardware developed for WEP. However, in November 2008, researchers developed an attack on WPA, allowing forgery of Address Resolution Protocol (ARP) packets. Subsequent enhancements have enabled ARP poisoning, cryptosystem denial of service, and man-in-the-middle attacks. Open source systems and methods (OSSM) have long been used to secure networks against such attacks. This article reviews OSSMs and the results of experimental attacks on WPA. These experiments re-created current attacks in a laboratory setting, recording both wired and wireless traffic. The article discusses methods of intrusion detection and prevention in the context of cyber physical protection of critical Internet infrastructure. The basis for this research is a specialized (and undoubtedly incomplete) taxonomy of Wi-Fi attacks and their adaptations to existing countermeasures and protocol revisions. Ultimately, this article aims to provide a clearer picture of how and why wireless protection protocols and encryption must achieve a more scientific basis for detecting and preventing such attacks.

  18. On identifying the specular reflection of sunlight in earth-monitoring satellite data.

    SciTech Connect (OSTI)

    Nelsen, James M., Jr.; Hohlfelder, Robert James; Jackson, Dale Clayton; Longenbaugh, Randolph S.

    2009-03-01

    Among the background signals commonly seen by Earth-monitoring satellites is the specular reflection of sunlight off of Earth's surface, commonly referred to as a glint. This phenomenon, involving liquid or ice surfaces, can result in the brief, intense illumination of satellite sensors appearing from the satellite perspective to be of terrestrial origin. These glints are important background signals to be able to identify with confidence, particularly in the context of analyzing data from satellites monitoring for transient surface or atmospheric events. Here we describe methods for identifying glints based on the physical processes involved in their production, including spectral fitting and polarization measurements. We then describe a tool that, using the WGS84 spheroidal Earth model, finds the latitude and longitude on Earth where a reflection of this type could be produced, given input Sun and satellite coordinates. This tool enables the user to determine if the surface at the solution latitude and longitude is in fact reflective, thus identifying the sensor response as a true glint or an event requiring further analysis.

  19. The Plane Truth: Andromeda analog thin Planes of Satellites are not kinematical coherent structures

    E-Print Network [OSTI]

    Buck, Tobias; Macciò, Andrea V

    2015-01-01

    A large fraction of the dwarf satellite galaxies orbiting the Andromeda galaxy are surprisingly aligned in a thin, extended and seemingly kinematically coherent planar structure. Such a structure is not easily found in simulations based on the Cold Dark Matter model. Using 21 high resolution cosmological simulations based on this model we analyze in detail the kinematical structure of planes of satellites resembling the one observed around Andromeda when co-rotation is characterized by the line-of-sight velocity. At the same time, when co-rotation is inferred by the angular momenta of the satellites, the planes are in excellent agreement with the plane around the Milky Way. Furthermore, we find such planes to be common in our simulations. Investigation of the kinematics of the satellites in the plane reveals that the number of co-rotating satellites varies by 2 to 5 out of ~12 depending on the viewing angle. These variations are consistent with that obtained from a sample with random velocities. Using instead...

  20. GEOPHYSICS, VOL. 64, NO. 6 (NOVEMBER-DECEMBER 1999); P. 17481755, 7 FIGS., 1 TABLE. Stacked global satellite gravity profiles

    E-Print Network [OSTI]

    Sandwell, David T.

    ) of Geosat/ERM (up to 62 cy- cles), ERS-1/2 (up to 43 cycles), and Topex (up to 142 cycles) satellite

  1. Spatial distribution of isoprene emissions from North America derived from formaldehyde column measurements by the OMI satellite sensor

    E-Print Network [OSTI]

    2008-01-01

    Temperature-dependent formaldehyde cross-sections in theSatellite observations of formaldehyde over North AmericaAppli- cation to formaldehyde retrievals from the Global

  2. Quantifying the seasonal and interannual variability of North American isoprene emissions using satellite observations of the formaldehyde column

    E-Print Network [OSTI]

    2006-01-01

    Satellite observations of formaldehyde over North Americasatellites: Application to formaldehyde retrievals from theNorth America using formaldehyde column observations from

  3. Interannual variations of river water storage from a multiple satellite approach: A case study for the Rio Negro River basin

    E-Print Network [OSTI]

    Frappart, Frédéric; Papa, Fabrice; Famiglietti, James S; Prigent, Catherine; Rossow, William B; Seyler, Frédérique

    2008-01-01

    satellite track runs along the river. As T/P cross track (orthe T/P tracks run parallel to the river. In these cases,

  4. Microsoft Word - Johnston.IOS.Network Communication as a Service...

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

    system communication be based on a service-oriented capability. Keywords. Energy Sciences Network (ESnet), networks for large-scale science, network planning, networks...

  5. BIAS-FREE SHEAR ESTIMATION USING ARTIFICIAL NEURAL NETWORKS

    SciTech Connect (OSTI)

    Gruen, D.; Seitz, S.; Koppenhoefer, J.; Riffeser, A., E-mail: dgruen@usm.uni-muenchen.d [University Observatory Munich, Scheinerstrasse 1, 81679 Muenchen (Germany)

    2010-09-01

    Bias due to imperfect shear calibration is the biggest obstacle when constraints on cosmological parameters are to be extracted from large area weak lensing surveys such as Pan-STARRS-3{pi}, DES, or future satellite missions like EUCLID. We demonstrate that bias present in existing shear measurement pipelines (e.g., KSB) can be almost entirely removed by means of neural networks. In this way, bias correction can depend on the properties of the individual galaxy instead of being a single global value. We present a procedure to train neural networks for shear estimation and apply this to subsets of simulated GREAT08 RealNoise data. We also show that circularization of the point-spread function (PSF) before measuring the shear reduces the scatter related to the PSF anisotropy correction and thus leads to improved measurements, particularly on low and medium signal-to-noise data. Our results are competitive with the best performers in the GREAT08 competition, especially for the medium and higher signal-to-noise sets. Expressed in terms of the quality parameter defined by GREAT08, we achieve a Q{approx} 40, 140, and 1300 without and 50, 200, and 1300 with circularization for low, medium, and high signal-to-noise data sets, respectively.

  6. The paradox of controlling complex networks: control inputs versus energy requirement

    E-Print Network [OSTI]

    Yu-Zhong Chen; Lezhi Wang; Wenxu Wang; Ying-Cheng Lai

    2015-09-10

    In this paper, we investigate the linear controllability framework for complex networks from a physical point of view. There are three main results. (1) If one applies control signals as determined from the structural controllability theory, there is a high probability that the control energy will diverge. Especially, if a network is deemed controllable using a single driving signal, then most likely the energy will diverge. (2) The energy required for control exhibits a power-law scaling behavior. (3) Applying additional control signals at proper nodes in the network can reduce and optimize the energy cost. We identify the fundamental structures embedded in the network, the longest control chains, which determine the control energy and give rise to the power-scaling behavior. (To our knowledge, this was not reported in any previous work on control of complex networks.) In addition, the issue of control precision is addressed. These results are supported by extensive simulations from model and real networks, physical reasoning, and mathematical analyses. Notes on the submission history of this work: This work started in late 2012. The phenomena of power-law energy scaling and energy divergence with a single controller were discovered in 2013. Strategies to reduce and optimize control energy was articulated and tested in 2013. The senior co-author (YCL) gave talks about these results at several conferences, including the NETSCI 2014 Satellite entitled "Controlling Complex Networks" on June 2, 2014. The paper was submitted to PNAS in September 2014 and was turned down. It was revised and submitted to PRX in early 2015 and was rejected. After that it was revised and submitted to Nature Communications in May 2015 and again was turned down.

  7. Web Services Dependency Networks Analysis

    E-Print Network [OSTI]

    Cherifi1, Chantal; Santucci, Jean-François

    2013-01-01

    Along with a continuously growing number of publicly available Web services (WS), we are witnessing a rapid development in semantic-related web technologies, which lead to the apparition of semantically described WS. In this work, we perform a comparative analysis of the syntactic and semantic approaches used to describe WS, from a complex network perspective. First, we extract syntactic and semantic WS dependency networks from a collection of publicly available WS descriptions. Then, we take advantage of tools from the complex network field to analyze them and determine their topological properties. We show WS dependency networks exhibit some of the typical characteristics observed in real-world networks, such as small world and scale free properties, as well as community structure. By comparing syntactic and semantic networks through their topological properties, we show the introduction of semantics in WS description allows modeling more accurately the dependencies between parameters, which in turn could l...

  8. Eradicating Computer Viruses on Networks

    E-Print Network [OSTI]

    Huang, Jinyu

    2012-01-01

    Spread of computer viruses can be modeled as the SIS (susceptible-infected-susceptible) epidemic propagation. We show that in order to ensure the random immunization or the targeted immunization effectively prevent computer viruses propagation on homogeneous networks, we should install antivirus programs in every computer node and frequently update those programs. This may produce large work and cost to install and update antivirus programs. Then we propose a new policy called "network monitors" to tackle this problem. In this policy, we only install and update antivirus programs for small number of computer nodes, namely the "network monitors". Further, the "network monitors" can monitor their neighboring nodes' behavior. This mechanism incur relative small cost to install and update antivirus programs.We also indicate that the policy of the "network monitors" is efficient to protect the network's safety. Numerical simulations confirm our analysis.

  9. Fiber networks amplify active stress

    E-Print Network [OSTI]

    Pierre Ronceray; Chase Broedersz; Martin Lenz

    2015-07-22

    Large-scale force generation is essential for biological functions such as cell motility, embryonic development, and muscle contraction. In these processes, forces generated at the molecular level by motor proteins are transmitted by disordered fiber networks, resulting in large-scale active stresses. While these fiber networks are well characterized macroscopically, this stress generation by microscopic active units is not well understood. Here we theoretically study force transmission in these networks, and find that local active forces are rectified towards isotropic contraction and strongly amplified as fibers collectively buckle in the vicinity of the active units. This stress amplification is reinforced by the networks' disordered nature, but saturates for high densities of active units. Our predictions are quantitatively consistent with experiments on reconstituted tissues and actomyosin networks, and shed light on the role of the network microstructure in shaping active stresses in cells and tissue.

  10. Bond percolation on multiplex networks

    E-Print Network [OSTI]

    Hackett, A; Gómez, S; Arenas, A; Gleeson, J P

    2015-01-01

    We present an analytical approach for bond percolation on multiplex networks and use it to determine the expected size of the giant connected component and the value of the critical bond occupation probability in these networks. We advocate the relevance of these tools to the modeling of multilayer robustness and contribute to the debate on whether any benefit is to be yielded from studying a full multiplex structure as opposed to its monoplex projection, especially in the seemingly irrelevant case of a bond occupation probability that does not depend on the layer. Although we find that in many cases the predictions of our theory for multiplex networks coincide with previously derived results for monoplex networks, we also uncover the remarkable result that for a certain class of multiplex networks, well described by our theory, new critical phenomena occur as multiple percolation phase transitions are present. We provide an instance of this phenomenon in a multipex network constructed from London rail and Eu...

  11. Views of wireless network systems.

    SciTech Connect (OSTI)

    Young, William Frederick; Duggan, David Patrick

    2003-10-01

    Wireless networking is becoming a common element of industrial, corporate, and home networks. Commercial wireless network systems have become reliable, while the cost of these solutions has become more affordable than equivalent wired network solutions. The security risks of wireless systems are higher than wired and have not been studied in depth. This report starts to bring together information on wireless architectures and their connection to wired networks. We detail information contained on the many different views of a wireless network system. The method of using multiple views of a system to assist in the determination of vulnerabilities comes from the Information Design Assurance Red Team (IDART{trademark}) Methodology of system analysis developed at Sandia National Laboratories.

  12. Optical frequency standards for gravitational wave detection using satellite Doppler velocimetry

    E-Print Network [OSTI]

    Vutha, Amar C

    2015-01-01

    Gravitational waves imprint apparent Doppler shifts on the frequency of photons propagating between an emitter and detector of light. This forms the basis of a method to detect gravitational waves using Doppler velocimetry between pairs of satellites. Such detectors, operating in the milli-hertz gravitational frequency band, could lead to the direct detection of gravitational waves. The crucial component in such a detector is the frequency standard on board the emitting and receiving satellites. We point out that recent developments in atomic frequency standards have led to devices that are approaching the sensitivity required to detect gravitational waves from astrophysically interesting sources. The sensitivity of satellites equipped with optical frequency standards for Doppler velocimetry is examined, and a design for a robust, space-capable optical frequency standard is presented.

  13. Optical frequency standards for gravitational wave detection using satellite Doppler velocimetry

    E-Print Network [OSTI]

    Amar C. Vutha

    2015-06-24

    Gravitational waves imprint apparent Doppler shifts on the frequency of photons propagating between an emitter and detector of light. This forms the basis of a method to detect gravitational waves using Doppler velocimetry between pairs of satellites. Such detectors, operating in the milli-hertz gravitational frequency band, could lead to the direct detection of gravitational waves. The crucial component in such a detector is the frequency standard on board the emitting and receiving satellites. We point out that recent developments in atomic frequency standards have led to devices that are approaching the sensitivity required to detect gravitational waves from astrophysically interesting sources. The sensitivity of satellites equipped with optical frequency standards for Doppler velocimetry is examined, and a design for a robust, space-capable optical frequency standard is presented.

  14. A 1-D evolutionary model for icy satellites, applied to Enceladus

    E-Print Network [OSTI]

    Prialnik, Uri Malamud Dina

    2015-01-01

    We develop a long-term 1-D evolution model for icy satellites that couples multiple processes: water migration and differentiation, geochemical reactions and silicate phase transitions, compaction by self-gravity, and ablation. The model further considers the following energy sources and sinks: tidal heating, radiogenic heating, geochemical energy released by serpentinization or absorbed by mineral dehydration, gravitational energy and insolation, and heat transport by conduction, convection, and advection. We apply the model to Enceladus, by guessing the initial conditions that would render a structure compatible with present-day observations, assuming the initial structure to have been homogeneous. Assuming the satellite has been losing water continually along its evolution, we postulate that it was formed as a more massive, more icy and more porous satellite, and gradually transformed into its present day state due to sustained long-term tidal heating. We consider several initial compositions and evolution...

  15. On the neutral gas content of nine new Milky Way satellite galaxy candidates

    E-Print Network [OSTI]

    Westmeier, T; Calabretta, M; Jurek, R; Koribalski, B S; Meyer, M; Popping, A; Wong, O I

    2015-01-01

    We use a new, improved version of the HI Parkes All-Sky Survey to search for HI emission from nine new, ultra-faint Milky Way satellite galaxy candidates recently discovered in data from the Dark Energy Survey. None of the candidates is detected in HI, implying upper limits for their HI masses of typically several hundred to a few thousand solar masses. The resulting upper limits on M_HI / L_V and M_HI / M_star suggest that at least some of the new galaxy candidates are HI deficient. This finding is consistent with the general HI deficiency of satellite galaxies located within the Milky Way's virial radius and supports the hypothesis that gas is being removed from satellites by tidal and ram-pressure forces during perigalactic passages. In addition, some of the objects may be embedded in, and interacting with, the extended neutral and ionised gas filaments of the Magellanic Stream.

  16. Surface reflectance retrieval from satellite and aircraft sensors: Results of sensor and algorithm comparisons during FIFE

    SciTech Connect (OSTI)

    Markham, B.L. ); Halthore, R.N.; Goetz, S.J. )

    1992-11-30

    This work is part of the First International Satellite Land Surface Climatology Project (ISLSCP) Field Experiment (FIFE), an international land-surface-atmosphere experiment aimed at improving the way climate models represent energy, water, heat, and carbon exchanges, and improving the utilization of satellite based remote sensing to monitor such parameters. This paper reports on comparison of measurement systems which were deployed to measure surface reflectance factors, from aircraft or satellites. These instruments look over the general range of 0.4 to 2.5[mu]m. Instruments studied include Landsat 5 thematic mapper (TM), the SPOT 1 high-resolution visible sensor (HRV) 1, the NS001 thematic mapper simulator, and the modular multispectral radiometers (MMRs). The study looked at the radiometric consistency of the different instruments, and the adequacy of the atmospheric correction routines applied to data analysis.

  17. Astrometric positions for 18 irregular satellites of giant planets from 23 years of observations

    E-Print Network [OSTI]

    Gomes-Júnior, A R; Vieira-Martins, R; Arlot, J -E; Camargo, J I B; Braga-Ribas, F; Neto, D N da Silva; Andrei, A H; Dias-Oliveira, A; Morgado, B E; Benedetti-Rossi, G; Duchemin, Y; Desmars, J; Lainey, V; Thuillot, W

    2015-01-01

    The irregular satellites of the giant planets are believed to have been captured during the evolution of the solar system. Knowing their physical parameters, such as size, density, and albedo is important for constraining where they came from and how they were captured. The best way to obtain these parameters are observations in situ by spacecrafts or from stellar occultations by the objects. Both techniques demand that the orbits are well known. We aimed to obtain good astrometric positions of irregular satellites to improve their orbits and ephemeris. We identified and reduced observations of several irregular satellites from three databases containing more than 8000 images obtained between 1992 and 2014 at three sites (Observat\\'orio do Pico dos Dias, Observatoire de Haute-Provence, and European Southern Observatory - La Silla). We used the software PRAIA (Platform for Reduction of Astronomical Images Automatically) to make the astrometric reduction of the CCD frames. The UCAC4 catalog represented the Inte...

  18. Using the Milky Way satellites to study interactions between cold dark matter and radiation

    E-Print Network [OSTI]

    C. Boehm; J. A. Schewtschenko; R. J. Wilkinson; C. M. Baugh; S. Pascoli

    2014-08-19

    The cold dark matter (CDM) model faces persistent challenges on small scales. In particular, taken at face value, the model significantly overestimates the number of satellite galaxies around the Milky Way. Attempts to solve this problem remain open to debate and have even led some to abandon CDM altogether. However, current simulations are limited by the assumption that dark matter feels only gravity. Here, we show that including interactions between CDM and radiation (photons or neutrinos) leads to a dramatic reduction in the number of satellite galaxies, alleviating the Milky Way satellite problem and indicating that physics beyond gravity may be essential to make accurate predictions of structure formation on small scales. The methodology introduced here gives constraints on dark matter interactions that are significantly improved over those from the cosmic microwave background.

  19. Logistical Networking Sharing More than the Wires

    E-Print Network [OSTI]

    Plank, Jim

    1 Logistical Networking Sharing More than the Wires Micah Beck, Terry Moore, Jim Plank, Martin: logistical networking, active networking, storage, caching, electronic mail Abstract: Logistical Networking into account all the network's underlying physical resources. In this paper we contrast Logistical and Active

  20. Network Layer Routing -II Yatindra Nath Singh

    E-Print Network [OSTI]

    Singh Yatindra Nath

    networks e.g., Ethernet, point-to-point network, networks which have their own routing protocols. Broadcast network Gateway Point-to-point link Network Arbitrary Gateway Gateway Gateway Fig.2.1 4 #12;' & $ within the existing, the routing table entry is updated. 8 #12;' & $ This gives the increamental update of routing

  1. Network Creation: Overview Christian Borgelt

    E-Print Network [OSTI]

    Borgelt, Christian

    ´errez Quir´os s/n, E-33600 Mieres (Asturias), Spain christian.borgelt@softcomputing.es Although networks

  2. Deterministic Scale-Free Networks

    E-Print Network [OSTI]

    Albert-Laszlo Barabasi; Erzsebet Ravasz; Tamas Vicsek

    2002-02-06

    Scale-free networks are abundant in nature and society, describing such diverse systems as the world wide web, the web of human sexual contacts, or the chemical network of a cell. All models used to generate a scale-free topology are stochastic, that is they create networks in which the nodes appear to be randomly connected to each other. Here we propose a simple model that generates scale-free networks in a deterministic fashion. We solve exactly the model, showing that the tail of the degree distribution follows a power law.

  3. Power network analysis and optimization

    E-Print Network [OSTI]

    Zhang, Wanping

    2009-01-01

    chip power supply network optimization using multigrid-basedchip decoupling capacitor optimization for high- performanceSapatnekar, “Analysis and optimization of structured power/

  4. Communication in Home Area Networks

    E-Print Network [OSTI]

    Wang, Yubo

    2012-01-01

    and implementation of smart home energy management systemsStandard Technologies for Smart Home Area Networks EnablingInteroperability framework for smart home systems”, Consumer

  5. Imprinted Networks as Chiral Pumps

    E-Print Network [OSTI]

    Y. Mao; M. Warner

    2001-01-12

    We investigate the interaction between a chirally imprinted network and a solvent of chiral molecules. We find, a liquid crystalline polymer network is preferentially swollen by one component of a racemic solvent. This ability to separate is linked to the chiral order parameter of the network, and can be reversibly controlled via temperature or a mechanical deformation. It is maximal near the point at which the network loses its imprinted structure. One possible practical application of this effect would be a mechanical device for sorting mixed chiral molecules.

  6. Fusion Energy Sciences Network Requirements

    E-Print Network [OSTI]

    Dart, Eli

    2014-01-01

    Division, and the Office of Fusion Energy Sciences. This isFusion Energy Sciences NetworkRequirements Office of Fusion Energy Sciences Energy

  7. Communication in Home Area Networks

    E-Print Network [OSTI]

    Wang, Yubo

    2012-01-01

    of smart home energy management systems based on zigbee”,Networks Enabling Energy Management Systems ”, Universities'Profile HV Home Energy Management System High Voltage SNR

  8. Mobility in Wireless Sensor Networks

    E-Print Network [OSTI]

    Mehta, Ankur Mukesh

    2012-01-01

    4 Wireless Protocol Modifications 4.1contains a distributed wireless network with per- vasiveprocessing, control, and wireless communication on a board

  9. 2013 Alumni Network Award Winners

    E-Print Network [OSTI]

    Spence, Harlan Ernest

    interests. #12;Winter­Spring 2014 BOSTONIA , . March 19, 2014 An Evening with Digital2013 Alumni Network Award Winners Are Announced Alumni volunteers around the globe are recognized

  10. Network interdiction with budget constraints

    SciTech Connect (OSTI)

    Santhi, Nankakishore; Pan, Feng

    2009-01-01

    Several scenarios exist in the modern interconnected world which call for efficient network interdiction algorithms. Applications are varied, including computer network security, prevention of spreading of Internet worms, policing international smuggling networks, controlling spread of diseases and optimizing the operation of large public energy grids. In this paper we consider some natural network optimization questions related to the budget constrained interdiction problem over general graphs. Many of these questions turn out to be computationally hard to tackle. We present a particularly interesting practical form of the interdiction question which we show to be computationally tractable. A polynomial time algorithm is then presented for this problem.

  11. US EPA Regional Laboratory Network

    E-Print Network [OSTI]

    LABORATORY NETWORK List of Acronyms AMD ............Acid Mine Drainage BNA..............Base/Neutrals and Acids Extractable Organics BMP.............Best Management Practice BOD .............Biological Oxygen

  12. Comparison of heavy ion-induced K? x-ray satellite spectra from gases and solids 

    E-Print Network [OSTI]

    Demarest, John Allen

    1977-01-01

    COMPARISON OF HEAVY ION-INDUCED IQX X-RAY SATELLITE SPECTRA FROM GASES AND SOLIDS A Thesis by JOHN ALLEN DEMAREST Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE December 1977 Ma)or Subject: Chemistry COMPARISON OF HEAVY ION-INDUCED Ks X-RAY SATELLITE SPECTRA FROM GASES AND SOLIDS A Thesis by JOHN ALLEN DEMAREST Approved as to style and content by (Chairman of Committee) 7&F~. ~MA (Head...

  13. Comparison of Precision Orbit Derived Density Estimates for CHAMP and GRACE Satellites

    E-Print Network [OSTI]

    Fattig, Eric

    2011-04-21

    NOMENCLATURE Symbol Definition Units draga acceleration vector due to atmospheric drag m/s 2 ap geomagnetic 3-hourly planetary equivalent amplitude index gamma, Telsa, or kg s m-1 A satellite cross-sectional area m2 Ap geomagnetic daily planetary... amplitude index gamma, Telsa, or kg s m-1 BB estimated ballistic coefficient correction ~ BC ballistic coefficient m2/kg Dc satellite drag coefficient ~ d cross correlation delay F10.7 daily solar radio flux measured at 10.7 cm wavelength SFU 10.7F...

  14. On-orbit calibration of soft X-ray detector on Chang'E-2 satellite

    E-Print Network [OSTI]

    Hong Xiao; Wenxi Penga; Huanyu Wang; Xingzhu Cui; Dongya Guo

    2015-02-02

    X-ray spectrometer is one of the satellite payloads on Chang'E-2 satellite. The soft X-ray detector is one of the device on X-ray spectrometer which is designed to detect the major rock-forming elements within 0.5-10keV range on lunar surface. In this paper, energy linearity and energy resolution calibration is done using a weak Fe55 source, while temperature and time effect is considered not take big error. The total uncertainty is estimated to be within 5% after correction.

  15. Workshop on Satellite Power Systems (SPS) effects on optical and radio astronomy

    SciTech Connect (OSTI)

    Stokes, G.M.; Ekstrom, P.A.

    1980-04-01

    The impacts of the SPS on astronomy were concluded to be: increased sky brightness, reducing the effective aperture of terrestrial telescopes; microwave leakage radiation causing erroneous radioastronomical signals; direct overload of radioastronomical receivers at centimeter wavelengths; and unintentional radio emissions associated with massive amounts of microwave power or with the presence of large, warm structures in orbit causing the satellites to appear as individual stationary radio sources; finally, the fixed location of the geostationary satellite orbits would result in fixed regions of the sky being unusable for observations. (GHT)

  16. Evaluation of Clear Sky Models for Satellite-Based Irradiance Estimates

    SciTech Connect (OSTI)

    Sengupta, M.; Gotseff, P.

    2013-12-01

    This report describes an intercomparison of three popular broadband clear sky solar irradiance model results with measured data, as well as satellite-based model clear sky results compared to measured clear sky data. The authors conclude that one of the popular clear sky models (the Bird clear sky model developed by Richard Bird and Roland Hulstrom) could serve as a more accurate replacement for current satellite-model clear sky estimations. Additionally, the analysis of the model results with respect to model input parameters indicates that rather than climatological, annual, or monthly mean input data, higher-time-resolution input parameters improve the general clear sky model performance.

  17. Neutrino Solar Flare detection for a saving alert system of satellites and astronauts

    E-Print Network [OSTI]

    Daniele Fargion

    2011-06-19

    Largest Solar Neutrino Flare may be soon detectable by Deep Core neutrino detector immediately and comunicate to satellites or astronauts. Its detection is the fastest manifestation of a later (tens minutes,hours) dangerous cosmic shower. The precursor trigger maybe saving satellites and even long flight astronauts lives. We shall suggest how. Moreover their detection may probe the inner solar flare acceleration place as well as the neutrino flavor mixing in a new different parameter windows. We show the updated expected rate and signature of neutrinos and antineutrinos in largest solar flare for present tens Megaton Deep Core telescope at tens Gev range. Speculation for additional Icecube gigaton array signals are also considered.

  18. Covert Communication Networks 

    E-Print Network [OSTI]

    Nix, Timothy Glen

    2013-08-02

    using shared keys assigned by the blender when a new jondo joins the crowd. Tor is the most popular anonymous communications system in use and is known as the second-generation onion router due to the fact that it is based on, and makes several modi... cations to the original onion routing design in terms of security, e - ciency, and deployability [17]. Tor uses a small set of trusted directory servers in order to distribute information about known onion routers in the network. In order to create a...

  19. BER Science Network Requirements

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAudits & Inspections Audits &driversNetwork Requirements Report of the

  20. BES Science Network Requirements

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

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

  1. Exploiting Network Parallelism

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFES OctoberEvan Racah Evan-5 Beamline 1-5 isExploiting Network

  2. Science-Driven Network

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque| StanfordOffice of Science (SC)Science-Driven Network

  3. Inside the Social Network's (Datacenter) Network Arjun Roy, Hongyi Zeng

    E-Print Network [OSTI]

    Zhou, Yuanyuan

    Inside the Social Network's (Datacenter) Network Arjun Roy, Hongyi Zeng , Jasmeet Bagga , George datacenters to house the computing infrastructure re- quired to support their services. Accordingly to efficiently interconnect and manage the traffic within these datacenters in perfor- mant yet efficient

  4. General Network Lifetime and Cost Models for Evaluating Sensor Network

    E-Print Network [OSTI]

    Heinzelman, Wendi

    General Network Lifetime and Cost Models for Evaluating Sensor Network Deployment Strategies Zhao Cheng, Mark Perillo, and Wendi B. Heinzelman, Senior Member, IEEE Abstract--In multihop wireless sensor to energy imbalance among sensors often appear. Sensors closer to a data sink are usually required

  5. Network Theory II: Stochastic Petri Nets, Chemical Reaction Networks

    E-Print Network [OSTI]

    Baez, John

    Network Theory II: Stochastic Petri Nets, Chemical Reaction Networks and Feynman Diagrams John Baez, Jacob Biamonte, Brendan Fong #12;A Petri net is a way of drawing a finite set S of species, a finite set(recovery) = infected t(recovery) = resistant #12;A Petri net is actually a way of presenting a symmetric monoidal

  6. Wireless Networks wireless ad-hoc and mesh networks

    E-Print Network [OSTI]

    Biagioni, Edoardo S.

    instead of radio waves Wireless Sensor Networks the Internet of Things, IoT #12;wireless mesh networks radio on and receiving a packet requires the most but even leaving on the radio still uses energy keep the radio off as much as possible, limit the number of packets sent hard to know when to turn on the radio

  7. Controlling Across Complex Networks Emerging links between networks and control

    E-Print Network [OSTI]

    , and Electrical Engineering University of New Mexico, Albuquerque NM 87131. Sandia National Laboratories communication network infrastructure into our designs; for example, we now consider the impact of link capacity as biology, computer science, physics, and social science. In such a context, networks provide a principled

  8. Behavior Propagation in Cognitive Radio Networks: A Social Network Approach

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    cliques when the spectrum occupancies change. The behavior dynamics have significant impacts on the perfor1 Behavior Propagation in Cognitive Radio Networks: A Social Network Approach Husheng Li, Ju Bin differential equation are used to explicitly describe the dynamics of behavior propagation. The analytic

  9. Understanding Online Social Network Usage from a Network Perspective

    E-Print Network [OSTI]

    Greenberg, Albert

    actually inter- act with OSNs by extracting clickstreams from passively monitored network traffic. Our characterization of user interactions within the OSN for four different OSNs (Facebook, LinkedIn, Hi5, and Stu- di Online Social Networks (OSNs) such as Facebook, MySpace, LinkedIn, Hi5, and StudiVZ, have become popular

  10. Quality-of-Information Aware Networking for Tactical Military Networks

    E-Print Network [OSTI]

    Yener, Aylin

    for a required quality of information when selecting information sources, transporting information through the need for a general, but formal, definition of quality- of-information so that this metric may of Information (QoI)-aware networking that seeks to model the network as an information source and directly

  11. Network Bandwidth Utilization Forecast Model on High Bandwidth Network

    SciTech Connect (OSTI)

    Yoo, Wucherl; Sim, Alex

    2014-07-07

    With the increasing number of geographically distributed scientific collaborations and the scale of the data size growth, it has become more challenging for users to achieve the best possible network performance on a shared network. We have developed a forecast model to predict expected bandwidth utilization for high-bandwidth wide area network. The forecast model can improve the efficiency of resource utilization and scheduling data movements on high-bandwidth network to accommodate ever increasing data volume for large-scale scientific data applications. Univariate model is developed with STL and ARIMA on SNMP path utilization data. Compared with traditional approach such as Box-Jenkins methodology, our forecast model reduces computation time by 83.2percent. It also shows resilience against abrupt network usage change. The accuracy of the forecast model is within the standard deviation of the monitored measurements.

  12. Context-aware computing for wireless networks

    E-Print Network [OSTI]

    Ergüt, Salih

    2010-01-01

    Packet Delay in Wireless Networks 2 Client Side Active QueueCellular and Sensor Networks Wireless Positioning Overviewin Mobile, Ad Hoc and Wireless Networks, pages 1–10, 2006. [

  13. Software Defined Wireless Networks: Unbridling SDNs

    E-Print Network [OSTI]

    Perkins, Dmitri

    Software Defined Wireless Networks: Unbridling SDNs Salvatore Costanzo, Laura Galluccio, Giacomo at analyzing how SDN can be beneficial in wireless infrastructureless networking environments with special emphasis on wireless personal area networks (WPAN). Furthermore, a possible approach (called SDWN

  14. Characterizing User Mobility in Wireless Networks

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    Nunes, Bruno Astuto Arouche

    2012-01-01

    Symmetry of User Mobility in Wireless Networks 3.1 MobilityAnalysis of a local-area wireless network. In ACM MOBI- COMand evaluation of wireless networks and their protocols.

  15. Sensor Networks: Distributed Algorithms Reloaded or Revolutions?

    E-Print Network [OSTI]

    Sensor Networks: Distributed Algorithms Reloaded ­ or Revolutions? Roger Wattenhofer Computer. This paper wants to motivate the distributed algorithms community to study sensor networks. We discuss why community, a sensor network essentially is ­ a database. The distributed algorithms community should join

  16. Efficient flooding for wireless mesh networks

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    Subramanian, Jayashree, Ph. D. Massachusetts Institute of Technology

    2012-01-01

    Flooding in wireless mesh networks involves distributing some data from one node to rest of the nodes in the network. This dissertation proposes UFlood, a flooding protocol for wireless mesh networks that targets large ...

  17. Multiple Scales in Small-World Networks

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    Kasturirangan, Rajesh

    1999-08-11

    Small-world architectures may be implicated in a range of phenomena from networks of neurons in the cerebral cortex to social networks and propogation of viruses. Small-world networks are interpolations of regular and ...

  18. Monotonic Target Assignment for Robotic Networks

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    Smith, Stephen L; Bullo, Francesco

    2009-01-01

    Target assignment for robotic networks: Worst-case andTARGET ASSIGNMENT FOR ROBOTIC NETWORKS [6] H. W. Kuhn, “TheTarget Assignment for Robotic Networks Stephen L. Smith,

  19. Improving performance of TCP over wireless networks 

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    Mehta, Miten N.

    1998-01-01

    TCP has been designed and tuned to perform well on a phics. wired network made up of links with low bit-error rates. Wireless networks and heterogeneous networks consisting of wired and wireless links have many different characteristics compared...

  20. MIXIT: The Network Meets the Wireless Channel

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    Katti, Sachin

    2007-09-04

    The traditional contract between the network and the lower layers states that the network does routing and the lower layers deliver correct packets. In a wireless network, however, different nodes may hear most bits in a ...