Sample records for network satellite server

  1. T-649: Red Hat Network Satellite Server Request Validation Flaw...

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

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

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

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

    Apache modproxymodrewrite Bug Lets Remote Users Access Internal Servers U-047: Siemens Automation License Manager Bugs Let Remote Users Deny Service or Execute Arbitrary...

  3. 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.

  4. Conserving Disk Energy in Network Servers Enrique V. Carrera, Eduardo Pinheiro, and Ricardo Bianchini

    E-Print Network [OSTI]

    Bianchini, Ricardo

    Conserving Disk Energy in Network Servers #3; Enrique V. Carrera, Eduardo Pinheiro, and Ricardo,edpin,ricardobg@cs.rutgers.edu ABSTRACT In this paper we study four approaches to conserving disk energy in high­performance network General Terms Experimentation, measurement Keywords Energy conservation, network servers, disk power 1

  5. Joint Routing and Server Selection for Multiple Description Video Streaming in Ad Hoc Networks

    E-Print Network [OSTI]

    Hou, Y. Thomas

    Joint Routing and Server Selection for Multiple Description Video Streaming in Ad Hoc Networks ad hoc networks. In this paper, we study the important problem of joint routing and server selection for MD video in ad hoc networks. We take a cross-layer approach to formulate the task as a combinatorial

  6. Micro-Navigation Satellite Network Design and Analysis

    E-Print Network [OSTI]

    Won, Chang-Hee

    Micro-Navigation Satellite Network Design and Analysis Bei Kang, Electrical and Computer for successful navigation. In this paper, we design and analyze the micro-navigation satellite network that share was a system engineer at JT Inc., Incheon, from 2000 to 2003. His research interests include sensor networks

  7. Sun's Network File System (NFS) One of the first uses of distributed client/server computing was

    E-Print Network [OSTI]

    Sheridan, Jennifer

    34 Sun's Network File System (NFS) One of the first uses of distributed client/server computing of data across clients. Thus, if 1 #12;2 SUN'S NETWORK FILE SYSTEM (NFS) you access a file on one machine-DUSSEAU #12;SUN'S NETWORK FILE SYSTEM (NFS) 3 even; in the best such case, no network traffic need be gener

  8. E-Print Network 3.0 - advanced server klasterdamise Sample Search...

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

    server klasterdamise Search Powered by Explorit Topic List Advanced Search Sample search results for: advanced server klasterdamise Page: << < 1 2 3 4 5 > >> 1 Windows Server 2008...

  9. 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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists' Research Petroleum ReserveDepartmentScripting Attacks |Department of Energy

  10. Verifying the secure setup of Unix client/servers and detection of network intrusion

    SciTech Connect (OSTI)

    Feingold, R.; Bruestle, H.R.; Bartoletti, T.; Saroyan, A.; Fisher, J.

    1995-07-01T23:59:59.000Z

    This paper describes our technical approach to developing and delivering Unix host- and network-based security products to meet the increasing challenges in information security. Today`s global ``Infosphere`` presents us with a networked environment that knows no geographical, national, or temporal boundaries, and no ownership, laws, or identity cards. This seamless aggregation of computers, networks, databases, applications, and the like store, transmit, and process information. This information is now recognized as an asset to governments, corporations, and individuals alike. This information must be protected from misuse. The Security Profile Inspector (SPI) performs static analyses of Unix-based clients and servers to check on their security configuration. SPI`s broad range of security tests and flexible usage options support the needs of novice and expert system administrators alike. SPI`s use within the Department of Energy and Department of Defense has resulted in more secure systems, less vulnerable to hostile intentions. Host-based information protection techniques and tools must also be supported by network-based capabilities. Our experience shows that a weak link in a network of clients and servers presents itself sooner or later, and can be more readily identified by dynamic intrusion detection techniques and tools. The Network Intrusion Detector (NID) is one such tool. NID is designed to monitor and analyze activity on an Ethernet broadcast Local Area Network segment and produce transcripts of suspicious user connections. NID`s retrospective and real-time modes have proven invaluable to security officers faced with ongoing attacks to their systems and networks.

  11. E-Print Network 3.0 - atlas web server Sample Search Results

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

    atlas web server Search Powered by Explorit Topic List Advanced Search Sample search results for: atlas web server Page: << < 1 2 3 4 5 > >> 1 A Portable Image Annotation Tool for...

  12. E-Print Network 3.0 - applications technology satellite Sample...

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

    MARCH 2002 Computing Call-Blocking Probabilities in LEO Summary: to extend the reach of networks and applications to anywhere on earth. Satellites can be launched... ON VEHICULAR...

  13. Fuel cells as a backup energy source for high availability network servers

    E-Print Network [OSTI]

    Humphrey, Daniel Alan

    2008-10-10T23:59:59.000Z

    This thesis proposes an uninterruptible power supply, UPS for high availability servers with fuel cells as its back up energy source. The system comprises a DC to DC converter designed to accommodate the fuel cellâ s wide output voltage range. A...

  14. Network Programming 1 Computer Networks

    E-Print Network [OSTI]

    Verschelde, Jan

    Network Programming 1 Computer Networks client/server architecture, protocols, and sockets 2;Network Programming 1 Computer Networks client/server architecture, protocols, and sockets 2 Network;client/server architecture Client/server architecture defines the communication between two computers

  15. artificial satellites: Topics by E-print Network

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

    been carried out by two different groups of people combining artificial intelligence and artificial life techniques with those of virtual environments Luck, Michael 239 Satellite...

  16. aster satellite images: Topics by E-print Network

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

    data, with no false positives. The failure rate is consistent with the inc... Lang, Dustin; Mierle, Keir; Blanton, Michael; Roweis, Sam 2009-01-01 267 The Satellite-substructure...

  17. artificial earth satellites: Topics by E-print Network

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

    earth satellites First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 On the possibility of testing the Weak...

  18. artificial earth satellite: Topics by E-print Network

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

    earth satellite First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 On the possibility of testing the Weak...

  19. Robustness of Ethernet-Based Real-Time Networked Control System with Multi-Level Client/Server Architecture

    E-Print Network [OSTI]

    Bibinagar, Naveen Kumar

    2010-10-12T23:59:59.000Z

    scenarios ranging from single-client-single-server to multi-client-multi-server architectures. Chapter V presents the performance comparisons of clients in the different experimental scenarios Chapter VI summarizes and concludes this thesis... input as a PWM signal. The digital controller for DC motor speed-control system is given by (2) [30]. ?unullknull?=?unullk?-?1null?+ nullK P + 0.5K I hnullenullknull + null0.5K I h - K P nulle(k - 1) (3) 17 Figure 10. DC motor speed...

  20. A NS-2 Simulation model of DVB-S2/RCS Satellite network Thierry Gayraud 1,2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A NS-2 Simulation model of DVB-S2/RCS Satellite network Thierry Gayraud 1,2 , Lionel Bertaux1 and it is not possible to enlarge the experimentation due to its induced cost. Running simulation model over Network. The second part is focused on the design of our simulation model using NS-2 simulation tool. The third part

  1. E-Print Network 3.0 - advanced satellite based Sample Search...

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

    Education, Culture, Sports, Summary: of epoch-making earth observation system based on Nano-satellite constellation Training tool suitable... in satellite-based application as...

  2. Pace Web Server: A Pure Java Web Server

    E-Print Network [OSTI]

    Tao, Lixin

    Pace Web Server: A Pure Java Web Server with a Servlet Container by Priya Srinivasaraghavan University 2003 #12;Abstract Pace Web Server: A Pure Java Web Server with a Servlet Container by Priya their products and services to their customers. An essential ingredient to the Internet has been the web server

  3. Energy-aware Job Assignment in Server Farms with Setup Delays under LCFS and PS

    E-Print Network [OSTI]

    Hyytiä, Esa

    Energy-aware Job Assignment in Server Farms with Setup Delays under LCFS and PS Esa Hyytiä of Communications and Networking Aalto University, Finland Abstract--We consider the job (or task) assignment problem to heterogeneous parallel servers, where servers can be switched off to save energy. However

  4. E-Print Network 3.0 - astronomical satellite iras Sample Search...

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

    IRAS: Infrared Astronomical Satellite IRIS: Infrared Imager and Spectrometer near-infrared in Source: Whiting, Matthew - Australia Telescope National Facility...

  5. E-Print Network 3.0 - aau-cubesat student satellite Sample Search...

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

    L., Educational Benefits from the AAU-cubesat... Student Satellite Pro-ject, AAIAIAC, 2003. IAC 2003 conference ... Source: Politecnico di Torino, Dipartimento di...

  6. E-Print Network 3.0 - akebono exos-d satellite Sample Search...

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

    Polytechnique, Centre de mathmatiques Collection: Mathematics 26 Ann. Geophys., 25, 16031615, 2007 www.ann-geophys.net2516032007 Summary: frequently by the CHAMP satellite...

  7. E-Print Network 3.0 - aircraft-and satellite-based ocean Sample...

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

    1. Titles and Speakers Summary: , Director of the Institute for Coastal Research in Geesthacht (1 hour) (2) Satellite-based products... in Geesthacht, (30 minuses) (3) Case...

  8. E-Print Network 3.0 - activated muscle satellite Sample Search...

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

    anemia or Summary: to endogenous muscle- derived satellite-stem-cells, this repair process was affected by a small number... in the skeletal muscle and progress along a...

  9. assessing satellite-based fire: Topics by E-print Network

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

    Radiation Budget (SRB) project updated its Perez, Richard R. 2 SATELLITE-BASED SOLAR RESOURCE ASSESSMENT: SOCIAL, ECONOMIC AND CULTURAL CHALLENGES AND BARRIERS, Renewable...

  10. E-Print Network 3.0 - ats satellites Sample Search Results

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

    Srensen, Leif... Title: Satellite Eye for Galathea 3 Annual Report 2006 Department: Wind Energy Department Abstract (max... . 2000 char.): ISSN 0106-2840 ISBN...

  11. E-Print Network 3.0 - atmospheric corrected satellite Sample...

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

    Satellites already measure sea surface temperature, rainfall, sea level, surface wind, and ocean... , then study the return pulses to measure and correct for the effects...

  12. E-Print Network 3.0 - advanced satellite sensors Sample Search...

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

    Rob Sherwood(1) Summary: has also enabled EO-1 to link with other satellites and ground sensors to form an autonomous sensor... . The use of automated planning onboard EO-1 has...

  13. E-Print Network 3.0 - atmosphere research satellite Sample Search...

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

    ground-based and satellite observations of the Sun. SP2 RC has wide expertise... Plasma Research Centre (SP2 RC), School of Mathematics and Statistics, University of Sheffield in...

  14. Deploying long-lived and cost-effective hybrid sensor networks Wen Hu a,b,*, Chun Tung Chou a,1

    E-Print Network [OSTI]

    Bulusu, Nirupama

    number of micro-servers, what is the maximum lifetime of a sensor network and the optimal micro-server placement? What benefit can additional micro-servers add to the network, and how financially cost micro-servers; and the placement of micro-servers can affect the lifetime of network significantly

  15. Introducing SQL Server 2008 R2 Datacenter INTRODUCING SQL SERVER

    E-Print Network [OSTI]

    Bernstein, Phil

    Introducing SQL Server 2008 R2 Datacenter INTRODUCING SQL SERVER® 2008 R2 DATACENTER Built on SQL Server 2008 R2 Enterprise, SQL Server 2008 R2 Datacenter is designed to deliver a high-performing data and consolidation, and management for an organization's database infrastructure. Datacenter helps enable

  16. A new generic method for the semi-automatic extraction of river and road networks in low and mid-resolution satellite images

    SciTech Connect (OSTI)

    Grazzini, Jacopo [Los Alamos National Laboratory; Dillard, Scott [PNNL; Soille, Pierre [EC JRC

    2010-10-21T23:59:59.000Z

    This paper addresses the problem of semi-automatic extraction of road or hydrographic networks in satellite images. For that purpose, we propose an approach combining concepts arising from mathematical morphology and hydrology. The method exploits both geometrical and topological characteristics of rivers/roads and their tributaries in order to reconstruct the complete networks. It assumes that the images satisfy the following two general assumptions, which are the minimum conditions for a road/river network to be identifiable and are usually verified in low- to mid-resolution satellite images: (i) visual constraint: most pixels composing the network have similar spectral signature that is distinguishable from most of the surrounding areas; (ii) geometric constraint: a line is a region that is relatively long and narrow, compared with other objects in the image. While this approach fully exploits local (roads/rivers are modeled as elongated regions with a smooth spectral signature in the image and a maximum width) and global (they are structured like a tree) characteristics of the networks, further directional information about the image structures is incorporated. Namely, an appropriate anisotropic metric is designed by using both the characteristic features of the target network and the eigen-decomposition of the gradient structure tensor of the image. Following, the geodesic propagation from a given network seed with this metric is combined with hydrological operators for overland flow simulation to extract the paths which contain most line evidence and identify them with the target network.

  17. On Dynamic Scheduling of a Parallel Server System with Partial Pooling

    E-Print Network [OSTI]

    proposed and refined by Harrison et al., we approximate the scheduling control problem for this parallel Scheduling of Parallel Servers. Keywords and phrases: Stochastic networks, dynamic control, resource pooling.3 Scheduling Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Sequence

  18. 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 ...

  19. Process Development and Analysis of SHA and Procurement of Servers for XYZ Organization

    E-Print Network [OSTI]

    Mehta, Abhijit D.

    2010-12-17T23:59:59.000Z

    – Operating System PXE – Pre-boot Execution Environment RFP – Request for Proposal RFQ – Request for Quote SAN – Storage Area Network SHA – Server Hosting Agreement SLA – Service Level Agreement SME – Subject Matter Expert USC – Unified Server... of creating an efficient reference process is to quickly react to any RFP (Request for Proposal) by the client in the least amount of time. This project serves as a standardized process that keeps the business objectives and goals in mind and creates a...

  20. Fair capacity sharing of multiple aperiodic servers

    E-Print Network [OSTI]

    Melapudi, Vinod Reddy

    2002-01-01T23:59:59.000Z

    For handling multiple aperiodic tasks with different temporal requirements, multiple aperiodic servers are used. Since capacity is partitioned statically among the multiple servers, they suffer from heavy capacity exhaustions. Bernat and Burns...

  1. Probabilistic Non-Repudiation for Source Authentication with TESLA Certificates in Hybrid Satellite/Wireless Networks and

    E-Print Network [OSTI]

    Baras, John S.

    Probabilistic Non-Repudiation for Source Authentication with TESLA Certificates in Hybrid Satellite describe a novel non-repudiation mechanism for an authentication protocol based on the extended TESLA to this problem, we have proposed a new class of lightweight, symmetric key certificates called extended TESLA

  2. Dynamic NetworksDynamic Networks ApplicationsApplications

    E-Print Network [OSTI]

    Nagurney, Anna

    Satellite Constellation Network #12;Satellite and Undersea Cable Networks #12;Energy NetworksEnergy Networks Electric Power Network #12;Duke Energy Gas Pipeline Network #12;Components of Some Common Physical Networks Roads, Airline Routes, Railroad Track Automobiles, Trains, and Planes, Manufacturing and logistics

  3. E-Print Network 3.0 - aware networked systems Sample Search Results

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

    Services Summary: . Keywords Awareness tools, Notification servers, agents, CASSIUS, ad-hoc networks INTRODUCTION The "Creating... CASSIUS: Designing Dynamic Subscription and...

  4. An N Server Cutoff Priority Queue Where Customers Request a Random Number of Servers

    E-Print Network [OSTI]

    Schaack, Christian

    Consider a multi-priority, nonpreemptive, N-server Poisson arrival queueing system. The number of servers requested by an arrival has a known probability distribution. Service times are negative exponential. In order to ...

  5. T-710: Apache HTTP Server Overlapping Ranges Denial of Service...

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

    0: Apache HTTP Server Overlapping Ranges Denial of Service Vulnerability T-710: Apache HTTP Server Overlapping Ranges Denial of Service Vulnerability September 6, 2011 - 3:09am...

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

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

    0: Red Hat Directory Server Information Disclosure Security Issue and Vulnerability U-200: Red Hat Directory Server Information Disclosure Security Issue and Vulnerability June 27,...

  7. U-094: EMC Documentum Content Server Lets Local Administrative...

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

    4: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated Privileges U-094: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated...

  8. U-168: EMC Documentum Information Rights Management Server Bugs...

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

    8: EMC Documentum Information Rights Management Server Bugs Let Remote Authenticated Users Deny Service U-168: EMC Documentum Information Rights Management Server Bugs Let Remote...

  9. The expandable network disk

    E-Print Network [OSTI]

    Muthitacharoen, Athicha, 1976-

    2008-01-01T23:59:59.000Z

    This thesis presents a virtual disk cluster called END, the Expandable Network Disk. END aggregates storage on a cluster of servers into a single virtual disk. END's main goals are to offer good performance during normal ...

  10. Balancing Peer and Server Energy Consumption in Large Peer-to-Peer File Distribution Systems

    E-Print Network [OSTI]

    Andrew, Lachlan

    Balancing Peer and Server Energy Consumption in Large Peer-to-Peer File Distribution Systems}@swin.edu.au Abstract--Network induced energy consumption is a significant fraction of all ICT energy consumption. It is shown that using peer-to-peer and naively minimizing the transfer time results in energy consumption

  11. ESnet IPv6 Mirror Servers

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to UserProduct:DirectivesSAND2015-21271MostMirror Servers Engineering

  12. Programmazione (scripting) server-side con PHP

    E-Print Network [OSTI]

    Goy, Anna

    1 MODULO 1 PARTE 3 Programmazione (scripting) server-side con PHP 3.c Goy - a.a. 2011 server contenuto nel cookie) Goy - a.a. 2011/2012 Programmazione Web 3 PHP: cookie - I E' possibile scrivere e leggere cookie utilizzando PHP Per scrivere un cookie, utilizzo la funzione predefinita

  13. Programmazione (scripting) server-side con PHP

    E-Print Network [OSTI]

    Goy, Anna

    1 MODULO 1 PARTE 3 Programmazione (scripting) server-side con PHP 3.c Goy - a.a. 2012 server contenuto nel cookie) Goy - a.a. 2012/2013 Programmazione Web 3 PHP: cookie - I E' possibile scrivere e leggere cookie utilizzando PHP Per scrivere un cookie, utilizzo la funzione predefinita

  14. Dynamic, transparent Internet server replication using HYDRANET

    E-Print Network [OSTI]

    Dillon, Geoffrey A.

    1998-01-01T23:59:59.000Z

    ) in the Internet. These agents will replicate the transport-level service access points of their origin servers and begin serving clients in the name of the origin server. A new protocol and application API was also developed that manages this service replication...

  15. Amazon EC2 Ireland OS: Windows Server

    E-Print Network [OSTI]

    Epema, Dick H.J.

    assigned object lifetimes Server Persistence API Orestes Interface RESTful HTTP Orestes Protocol Database Orestes: a REST protocol for horizontally scalable cloud database access Observations Reduction of serverInternet Orestes Cache Low latency High latency Orestes Arbitrary combinations of persistence API and DBReads scale

  16. Power and Energy Management for Server Systems Ricardo Bianchini

    E-Print Network [OSTI]

    Bianchini, Ricardo

    , of servers and supporting cooling infrastructures. Research on power and energy management for servers can requests coming from remote clients or other servers. Common examples are Web and application servers consumption have become key concerns in data centers. The peak power consumption dictates the required cooling

  17. Benefits of Windows Small Business Server Code Name "Aurora"

    E-Print Network [OSTI]

    Hunt, Galen

    Benefits of Windows Small Business Server Code Name "Aurora" includes: Daily automatic backups Business Server Code Name "Aurora" provides an easy-to-use solution ideal for first server small businesses with up to 25 users, Windows Small Business Server Code Name "Aurora" provides a cost-effective and easy

  18. A Proposed Algorithm to improve security & Efficiency of SSL-TLS servers using Batch RSA decryption

    E-Print Network [OSTI]

    Pateriya, R K; Shrivastava, S C; Patel, Jaideep

    2009-01-01T23:59:59.000Z

    Today, Internet becomes the essential part of our lives. Over 90 percent of the ecommerce is developed on the Internet. A security algorithm became very necessary for producer client transactions assurance and the financial applications safety. The rsa algorithm applicability derives from algorithm properties like confidentiality, safe authentication, data safety and integrity on the internet. Thus, this kind of networks can have a more easy utilization by practical accessing from short, medium, even long distance and from different public places. Rsa encryption in the client side is relatively cheap, whereas, the corresponding decryption in the server side is expensive because its private exponent is much larger. Thus ssl tls servers become swamped to perform public key decryption operations when the simultaneous requests increase quickly .The batch rsa method is useful for such highly loaded web server .In our proposed algorithm by reducing the response time and clients tolerable waiting time an improvement...

  19. EVA: evaluation of protein structure prediction servers

    E-Print Network [OSTI]

    Sali, Andrej

    day, sequences of newly available protein structures in the Protein Data Bank (PDB) are sent performance of protein structure prediction servers through a battery of objective measures for prediction

  20. Probabilistic Simulation of Multi-Stage Decisions for Operation of a Fractionated Satellite Mission

    E-Print Network [OSTI]

    Alonso, Juan J.

    base and national security programs. Fractionated Satellites While ideas regarding networked satellitesProbabilistic Simulation of Multi-Stage Decisions for Operation of a Fractionated Satellite Mission of net present value for a fractionated satellite constellation. The goal is to begin development

  1. E-Print Network 3.0 - array-valued statistical objects Sample...

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

    or from the entire network (global statistics). Now that you have created... object statistic, Server Load, and one global statistic, Ethernet Delay. 12;Collecting Statistics...

  2. Satellite-Based Quantum Communications

    SciTech Connect (OSTI)

    Hughes, Richard J [Los Alamos National Laboratory; Nordholt, Jane E [Los Alamos National Laboratory; McCabe, Kevin P [Los Alamos National Laboratory; Newell, Raymond T [Los Alamos National Laboratory; Peterson, Charles G [Los Alamos National Laboratory

    2010-09-20T23:59:59.000Z

    Single-photon quantum communications (QC) offers the attractive feature of 'future proof', forward security rooted in the laws of quantum physics. Ground based quantum key distribution (QKD) experiments in optical fiber have attained transmission ranges in excess of 200km, but for larger distances we proposed a methodology for satellite-based QC. Over the past decade we have devised solutions to the technical challenges to satellite-to-ground QC, and we now have a clear concept for how space-based QC could be performed and potentially utilized within a trusted QKD network architecture. Functioning as a trusted QKD node, a QC satellite ('QC-sat') could deliver secret keys to the key stores of ground-based trusted QKD network nodes, to each of which multiple users are connected by optical fiber or free-space QC. A QC-sat could thereby extend quantum-secured connectivity to geographically disjoint domains, separated by continental or inter-continental distances. In this paper we describe our system concept that makes QC feasible with low-earth orbit (LEO) QC-sats (200-km-2,000-km altitude orbits), and the results of link modeling of expected performance. Using the architecture that we have developed, LEO satellite-to-ground QKD will be feasible with secret bit yields of several hundred 256-bit AES keys per contact. With multiple ground sites separated by {approx} 100km, mitigation of cloudiness over any single ground site would be possible, potentially allowing multiple contact opportunities each day. The essential next step is an experimental QC-sat. A number of LEO-platforms would be suitable, ranging from a dedicated, three-axis stabilized small satellite, to a secondary experiment on an imaging satellite. to the ISS. With one or more QC-sats, low-latency quantum-secured communications could then be provided to ground-based users on a global scale. Air-to-ground QC would also be possible.

  3. Solar power satellites.

    E-Print Network [OSTI]

    Palmas, Alessandro

    2013-01-01T23:59:59.000Z

    ??During energy crisis at the end of the Sixties, a new idea to exploit solar energy arose: Solar Power Satellites. These satellites need a huge… (more)

  4. U-153: EMC Data Protection Advisor Server and Collector Bugs...

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

    53: EMC Data Protection Advisor Server and Collector Bugs Let Remote Users Deny Service U-153: EMC Data Protection Advisor Server and Collector Bugs Let Remote Users Deny Service...

  5. Evaluation of data and request distribution policies in clustered servers

    E-Print Network [OSTI]

    Khaleel, Adnan

    1999-01-01T23:59:59.000Z

    The popularity of the WWW has skyrocketed beyond all expectations and as a result the demands placed on traditional single machine servers has exceeded their original designs. Clustered-based servers are considered to be a viable alternative...

  6. V-013: EMC Avamar Client for VMware Discloses Server Password...

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

    3: EMC Avamar Client for VMware Discloses Server Password to Local Users V-013: EMC Avamar Client for VMware Discloses Server Password to Local Users October 31, 2012 - 6:00am...

  7. Decomposition Algorithm for Optimizing Multi-server Appointment ...

    E-Print Network [OSTI]

    2014-10-01T23:59:59.000Z

    We schedule appointments with random service durations on multiple servers with oper- ... ?Department of Industrial and Operations Engineering, University of

  8. Stochastic Models and Analysis for Resource Management in Server Farms

    E-Print Network [OSTI]

    farms. State-of-the-art servers come with multiple knobs to control energy consumption, but traditionalStochastic Models and Analysis for Resource Management in Server Farms Varun Gupta CMU-CS-11, Multi-server systems, Load balancing, Scheduling, M/G/k, Time-varying load, Energy management

  9. Cutting Corners: Workbench Automation for Server Benchmarking

    E-Print Network [OSTI]

    Chase, Jeffrey S.

    accuracy vs. cost tradeoffs, avail- ability of hardware resources, deadlines, and the results of previous". Systems researchers and de- velopers devote a lot of time and resources to running benchmarks to gain questions. Server benchmarking can be costly: a large number of runs may be needed, perhaps with different

  10. Pluggable Personal Data Servers Nicolas Anciaux*

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Pluggable Personal Data Servers Nicolas Anciaux* , Luc Bouganim* , Yanli Guo* , Philippe Pucheral, France @gemalto.com ABSTRACT An increasing amount of personal data is automatically gathered, introduces a credible alternative to the systematic centralization of personal data. By embedding a full

  11. Programmazione (scripting) server-side con PHP

    E-Print Network [OSTI]

    Goy, Anna

    1 MODULO 1 PARTE 3 Programmazione (scripting) server-side con PHP 3.c Goy - a.a. 2010 contenuto nel cookie) Goy - a.a. 2010/2011 Programmazione Web 3 PHP: cookie - I E' possibile scrivere e leggere cookie utilizzando PHP Per scrivere un cookie, utilizzo la funzione predefinita setcookie

  12. Programmazione (scripting) server-side con PHP

    E-Print Network [OSTI]

    Goy, Anna

    1 MODULO 1 PARTE 3 Programmazione (scripting) server-side con PHP 3.d Goy - a.a. 2009 di interazione home.html ll h identif.php cancella.php cancellato.php logout.phpacquisti.php Goy - a.a. 2009/2010 Programmazione Web 5 sess_scad.html home.html - login/registrazione utente identif.php

  13. Programmazione (scripting) server-side con PHP

    E-Print Network [OSTI]

    Goy, Anna

    1 MODULO 1 PARTE 3 Programmazione (scripting) server-side con PHP 3.d Goy - a.a. 2010 di interazione home.html ll h identif.php cancella.php cancellato.php logout.phpacquisti.php Goy - a.a. 2010/2011 Programmazione Web 5 sess_scad.html home.html - login/registrazione utente identif.php

  14. Programmazione (scripting) server-side con PHP

    E-Print Network [OSTI]

    Goy, Anna

    1 MODULO 1 PARTE 3 Programmazione (scripting) server-side con PHP 3.c Goy - a.a. 2009) Goy - a.a. 2009/2010 Programmazione Web 3 PHP: cookie - I E' possibile scrivere e leggere cookie utilizzando PHP Per scrivere un cookie, utilizzo la funzione predefinita setcookie(...): nome del cookie

  15. Programmazione (scripting) server-side con PHP

    E-Print Network [OSTI]

    Goy, Anna

    1 MODULO 1 PARTE 3 Programmazione (scripting) server-side con PHP 3.d Goy - a.a. 2012 di interazione home.html ll h identif.php cancella.php cancellato.php logout.phpacquisti.php Goy - a.a. 2012/2013 Programmazione Web 5 sess_scad.html home.html - login/registrazione utente identif.php

  16. Programmazione (scripting) server-side con PHP

    E-Print Network [OSTI]

    Goy, Anna

    1 MODULO 1 PARTE 3 Programmazione (scripting) server-side con PHP 3.d Goy - a.a. 2011 di interazione home.html ll h identif.php cancella.php cancellato.php logout.phpacquisti.php Goy - a.a. 2011/2012 Programmazione Web 5 sess_scad.html home.html - login/registrazione utente identif.php

  17. NEOS Server 4.0 Administrative Guide

    E-Print Network [OSTI]

    2002-06-03T23:59:59.000Z

    May 30, 2002 ... automatically integrated into the NEOS Server. ... The user interfaces provided by NEOS are tailored to each particular ...... The manner in which an application reads options affects the amount of control users .... The remainder of this document is not intended for the casual reader interested only in the ...

  18. Universal Single-Server Blind Quantum Computation for Classical Client

    E-Print Network [OSTI]

    Hai-Ru Xu; Bang-Hai Wang

    2014-11-12T23:59:59.000Z

    Blind quantum computation allows a client without enough quantum technologies to delegate her quantum computation to quantum server, while keeping her input, output and algorithm secure. In this paper, we propose a universal single-server and classical-client blind quantum computation protocol based on entanglement swapping technology. In our protocol, the client interface with only one server and the only ability of the client requires is to get particles from trusted center and forward them to the server. Moreover, the protocol can be modified to make client completely classical by improving the ability of the trusted center. Numbers of blind quantum computation protocols have been presented in recent years, including single-, double- and triple-server protocols. In the single-server protocol, client needs to prepare single qubits. Though client can be classical in the double-server protocol, the two servers, who share Bell state from trusted center, are not allowed to communicate with each other. Recently, the triple-server protocol solves the noncommunication problem. Three servers, however, make the implementation of the computation sophisticated and unrealistic. Since it is impossible for blind quantum computation with only classical client and single server, blind quantum computation may work in the "Cloud + E-commerce" style in the future. Our protocol might become a key ingredient for real-life application in the first generation of quantum computations.

  19. E-Print Network 3.0 - area navigation network Sample Search Results

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

    and Computer... for successful navigation. In this paper, we design and analyze the micro-navigation satellite network that share... in the network. In this paper, we propose...

  20. Energy Efficiency in Small Server Rooms: Field Surveys and Findings

    SciTech Connect (OSTI)

    Cheung, Iris [Hoi; Greenberg, Steve; Mahdavi, Roozbeh; Brown, Richard; Tschudi, William

    2014-08-11T23:59:59.000Z

    Fifty-seven percent of US servers are housed in server closets, server rooms, and localized data centers, in what are commonly referred to as small server rooms, which comprise 99percent of all server spaces in the US. While many mid-tier and enterprise-class data centers are owned by large corporations that consider energy efficiency a goal to minimize business operating costs, small server rooms typically are not similarly motivated. They are characterized by decentralized ownership and management and come in many configurations, which creates a unique set of efficiency challenges. To develop energy efficiency strategies for these spaces, we surveyed 30 small server rooms across eight institutions, and selected four of them for detailed assessments. The four rooms had Power Usage Effectiveness (PUE) values ranging from 1.5 to 2.1. Energy saving opportunities ranged from no- to low-cost measures such as raising cooling set points and better airflow management, to more involved but cost-effective measures including server consolidation and virtualization, and dedicated cooling with economizers. We found that inefficiencies mainly resulted from organizational rather than technical issues. Because of the inherent space and resource limitations, the most effective measure is to operate servers through energy-efficient cloud-based services or well-managed larger data centers, rather than server rooms. Backup power requirement, and IT and cooling efficiency should be evaluated to minimize energy waste in the server space. Utility programs are instrumental in raising awareness and spreading technical knowledge on server operation, and the implementation of energy efficiency measures in small server rooms.

  1. zUpdate: Updating Data Center Networks with Zero Loss Hongqiang Harry Liu

    E-Print Network [OSTI]

    @microsoft.com ABSTRACT Datacenter networks (DCNs) are constantly evolving due to various updates such as switch upgrades datacenter networks (DCNs) with thousands of switches and hundreds of thousands of servers. Due to the sheer

  2. E-Print Network 3.0 - apache Sample Search Results

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

    < 1 2 3 4 5 > >> 1 Jeremy Stribling, Frans Kaashoek, Jinyang Li, Robert Morris Summary: Web cache 12;Exploit a Network File System Network File Server (mntawesome-cdncache)...

  3. E-Print Network 3.0 - aspect ratio micro Sample Search Results

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

    Carolina Collection: Engineering 42 Deploying long-lived and cost-effective hybrid sensor networks Wen Hu a,b,*, Chun Tung Chou a,1 Summary: network Number of micro-servers...

  4. T-682:Double free vulnerability in MapServer

    Broader source: Energy.gov [DOE]

    MapServer developers have discovered flaws in the OGC filter support in MapServer. Specific code is used in support of WFS, WMS-SLD and SOS specifications. All versions may be susceptible to SQL injection under certain circumstances. The extent of the vulnerability depends on the MapServer version, relational database and mapfile configuration being used. All users are strongly encouraged to upgrade to these latest releases.

  5. 2014-02-21 Issuance: Proposed Determination of Computer Servers...

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

    withdrawing the previously proposed determination that computer servers qualify as a covered product, as issued by the Deputy Assistant Secretary for Energy Efficiency on February...

  6. V-054: IBM WebSphere Application Server for z/OS Arbitrary Command Execution Vulnerability

    Broader source: Energy.gov [DOE]

    A vulnerability was reported in the IBM HTTP Server component 5.3 in IBM WebSphere Application Server (WAS) for z/OS

  7. Oak Ridge Office SharePoint( MicrosoftSHarePointServer) PIA,...

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

    SharePoint( MicrosoftSHarePointServer) PIA, Information Resourses Management Division Oak Ridge Office SharePoint( MicrosoftSHarePointServer) PIA, Information Resourses Management...

  8. V-206: Apache HTTP Server mod_rewrite and "httpOnly" Cookie Disclosure...

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

    6: Apache HTTP Server modrewrite and "httpOnly" Cookie Disclosure Vulnerabilities V-206: Apache HTTP Server modrewrite and "httpOnly" Cookie Disclosure Vulnerabilities July 30,...

  9. V-011: IBM Tivoli Monitoring Web Server HTTP TRACE/TRACK Support...

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

    1: IBM Tivoli Monitoring Web Server HTTP TRACETRACK Support Lets Remote Users Obtain Potentially Sensitive Information V-011: IBM Tivoli Monitoring Web Server HTTP TRACETRACK...

  10. Automated Data Mining from Web Servers Using Perl Script

    E-Print Network [OSTI]

    Wilamowski, Bogdan Maciej

    Automated Data Mining from Web Servers Using Perl Script Sandeep Neeli , Kannan Govindasamy IL, USA olekmali@bradley.edu Abstract-Data mining from the Web is the process of extracting essential data from any web server. In this paper, we present a method called Ethernet Robot to extract

  11. Energy Consumption Characteriation of Heterogeneous Servers School of Computer Science

    E-Print Network [OSTI]

    Qin, Xiao

    Energy Consumption Characteriation of Heterogeneous Servers Xiao Zhang School of Computer Science Machine between servers to save energy. An accurate energy consumption model is the basic of energy management. Most past studies show that energy consumption has linear relation with resource utilization. We

  12. A Mathematical Programming Approach for Server Consolidation Problems

    E-Print Network [OSTI]

    Cengarle, MarĂ­a Victoria

    of energy and cooling, which sometimes account for 40-50 percent of the total data center operation costs [2 more space and consume more energy than can be justified by their workload. Server virtualization consolidation with dozens or hundreds of servers, which can be regularly found in enterprise data centers. Cost

  13. Energy Conservation in Heterogeneous Server Clusters Taliver Heath

    E-Print Network [OSTI]

    Bianchini, Ricardo

    Energy Conservation in Heterogeneous Server Clusters #3; Taliver Heath Dept. of Computer Science, measurement Keywords Energy conservation, server clusters, heterogeneity #3; This research has been supported.g., [3, 4, 9, 21]) and dynamic cluster recon#12;guration for energy conservation without per- formance

  14. Hydranet: network support for scaling of large scale servic es

    E-Print Network [OSTI]

    Chawla, Hamesh

    1998-01-01T23:59:59.000Z

    With the explosive growth of demand for services on the Internet, the networking infrastructure (routers 7 protocols, servers) is under considerable stress. Mechanisms are needed for current and future IP services to scale in a client transparent...

  15. Integrity and access control in untrusted content distribution networks

    E-Print Network [OSTI]

    Fu, Kevin E. (Kevin Edward), 1976-

    2005-01-01T23:59:59.000Z

    A content distribution network (CDN) makes a publisher's content highly available to readers through replication on remote computers. Content stored on untrusted servers is susceptible to attack, but a reader should have ...

  16. Experimental Satellite Quantum Communications

    E-Print Network [OSTI]

    Giuseppe Vallone; Davide Bacco; Daniele Dequal; Simone Gaiarin; Vincenza Luceri; Giuseppe Bianco; Paolo Villoresi

    2014-06-16T23:59:59.000Z

    Quantum Communications on planetary scale require complementary channels including ground and satellite links. The former have progressed up to commercial stage using fiber-cables, while for satellite links, the absence of terminals in orbit has impaired theirs development. However, the demonstration of the feasibility of such links is crucial for designing space payloads and to eventually enable the realization of protocols such as quantum-key-distribution (QKD) and quantum teleportation along satellite-to-ground or intersatellite links. We demonstrated the faithful transmission of qubits from space to ground by exploiting satellite corner cube retroreflectors acting as transmitter in orbit, obtaining a low error rate suitable for QKD. We also propose a two-way QKD protocol exploiting modulated retroreflectors that necessitates a minimal payload on satellite, thus facilitating the expansion of Space Quantum Communications.

  17. Power and Energy Management for Server Systems Ricardo Bianchini + and Ram Rajamony #

    E-Print Network [OSTI]

    Bianchini, Ricardo

    , of servers and supporting cooling infrastructures. Research on power and energy management for servers can requests coming from remote clients or other servers. Common examples are Web and application servers consumption have become key concerns in data centers. The peak power consumption dictates the required cooling

  18. Network topology analysis.

    SciTech Connect (OSTI)

    Kalb, Jeffrey L.; Lee, David S.

    2008-01-01T23:59:59.000Z

    Emerging high-bandwidth, low-latency network technology has made network-based architectures both feasible and potentially desirable for use in satellite payload architectures. The selection of network topology is a critical component when developing these multi-node or multi-point architectures. This study examines network topologies and their effect on overall network performance. Numerous topologies were reviewed against a number of performance, reliability, and cost metrics. This document identifies a handful of good network topologies for satellite applications and the metrics used to justify them as such. Since often multiple topologies will meet the requirements of the satellite payload architecture under development, the choice of network topology is not easy, and in the end the choice of topology is influenced by both the design characteristics and requirements of the overall system and the experience of the developer.

  19. Remote information service access system based on a client-server-service model

    DOE Patents [OSTI]

    Konrad, Allan M. (P.O. Box 4023, Berkeley, CA 94704)

    1999-01-01T23:59:59.000Z

    A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user's local host, thereby providing ease of use and minimal software maintenance for users of that remote service.

  20. Remote information service access system based on a client-server-service model

    DOE Patents [OSTI]

    Konrad, Allan M. (P.O. Box 4023, Berkeley, CA 94704)

    1997-01-01T23:59:59.000Z

    A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user's local host, thereby providing ease of use and minimal software maintenance for users of that remote service.

  1. Remote information service access system based on a client-server-service model

    DOE Patents [OSTI]

    Konrad, Allan M. (P.O. Box 4023, Berkeley, CA 94704)

    1996-01-01T23:59:59.000Z

    A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user's local host, thereby providing ease of use and minimal software maintenance for users of that remote service.

  2. Remote information service access system based on a client-server-service model

    DOE Patents [OSTI]

    Konrad, A.M.

    1996-08-06T23:59:59.000Z

    A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user`s local host, thereby providing ease of use and minimal software maintenance for users of that remote service. 16 figs.

  3. Remote information service access system based on a client-server-service model

    DOE Patents [OSTI]

    Konrad, A.M.

    1997-12-09T23:59:59.000Z

    A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user`s local host, thereby providing ease of use and minimal software maintenance for users of that remote service. 16 figs.

  4. On the Computational Practicality of Private Information Retrieval Network Security and Applied Cryptography Lab

    E-Print Network [OSTI]

    Carbunar, Bogdan

    On the Computational Practicality of Private Information Retrieval Radu Sion Network Security of single-server computational pri- vate information retrieval (PIR) for the purpose of preserv- ing client access patterns leakage. We show that deployment of non-trivial single server PIR protocols on real

  5. Achieving Sub-Second Downtimes in Internet-wide Virtual Machine Live Migrations in LISP Networks

    E-Print Network [OSTI]

    Secci, Stefano

    as a function of datacenter-datacenter and client-datacenter distances. I. INTRODUCTION Virtualization has been revolutionizing datacenter network- ing since a few years. Once solely based on physical server and mainframe interconnections, Cloud datacenters evolve with an increasing deployment of virtualization servers hosting, sending

  6. Secured Pace Web Server with Collaboration and Error Logging Capabilities

    E-Print Network [OSTI]

    Tao, Lixin

    : Secure Sockets Layer (SSL) using the Java Secure Socket Extension (JSSE) API, error logging............................................................................................ 8 Chapter 3 Secure Pace Web Server with SSL........................................................... 29 3.1 Introduction to SSL

  7. How to secure your servers, code and data

    ScienceCinema (OSTI)

    None

    2011-10-06T23:59:59.000Z

    Oral presentation in English, slides in English. Advice and best practices regarding the security of your servers, code and data will be presented. We will also describe how the Computer Security Team can help you reduce the risks.

  8. CAD Interfaces to the ARROW Manufactured Product Server

    E-Print Network [OSTI]

    Amor, Robert

    design tools (e.g., thermal simulation programs). The main parts of the system comprise the following through a design tool. Second, the main system or Building Object Warehouse (BOW) server. Third

  9. anonymous ftp server: Topics by E-print Network

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

    G. Tortone; F. M. Taurino 2003-05-27 42 Scalable Anonymous Communication with Provable Security Prateek Mittal, Nikita Borisov Computer Technologies and Information Sciences...

  10. Network Economics Anna Nagurney

    E-Print Network [OSTI]

    Nagurney, Anna

    Cables Radio Links Voice, Data, Video Energy Pumping Stations, Plants Pipelines, Transmission Lines Water building evacuation models · DNA sequence alignment · assembly line balancing · compact book storage Network Satellite and Undersea Cable Networks Duke Energy Gas Pipeline Network Transportation

  11. Comparing Server Energy Use and Efficiency Using Small Sample Sizes

    SciTech Connect (OSTI)

    Coles, Henry C.; Qin, Yong; Price, Phillip N.

    2014-11-01T23:59:59.000Z

    This report documents a demonstration that compared the energy consumption and efficiency of a limited sample size of server-type IT equipment from different manufacturers by measuring power at the server power supply power cords. The results are specific to the equipment and methods used. However, it is hoped that those responsible for IT equipment selection can used the methods described to choose models that optimize energy use efficiency. The demonstration was conducted in a data center at Lawrence Berkeley National Laboratory in Berkeley, California. It was performed with five servers of similar mechanical and electronic specifications; three from Intel and one each from Dell and Supermicro. Server IT equipment is constructed using commodity components, server manufacturer-designed assemblies, and control systems. Server compute efficiency is constrained by the commodity component specifications and integration requirements. The design freedom, outside of the commodity component constraints, provides room for the manufacturer to offer a product with competitive efficiency that meets market needs at a compelling price. A goal of the demonstration was to compare and quantify the server efficiency for three different brands. The efficiency is defined as the average compute rate (computations per unit of time) divided by the average energy consumption rate. The research team used an industry standard benchmark software package to provide a repeatable software load to obtain the compute rate and provide a variety of power consumption levels. Energy use when the servers were in an idle state (not providing computing work) were also measured. At high server compute loads, all brands, using the same key components (processors and memory), had similar results; therefore, from these results, it could not be concluded that one brand is more efficient than the other brands. The test results show that the power consumption variability caused by the key components as a group is similar to all other components as a group. However, some differences were observed. The Supermicro server used 27 percent more power at idle compared to the other brands. The Intel server had a power supply control feature called cold redundancy, and the data suggest that cold redundancy can provide energy savings at low power levels. Test and evaluation methods that might be used by others having limited resources for IT equipment evaluation are explained in the report.

  12. INTERACTING WITH SOCIAL NETWORKS TO IMPROVE HEALTHCARE BODY SENSOR NETWORKS

    E-Print Network [OSTI]

    Miles, Will

    Funding for this project was provided by a grant from the Dean's Senior Research Fund and Stetson.2 Body Sensor Networks..................................................................5 2.2.1 Energy, or BSNs, can remotely collect patient data and upload vital statistics to servers over the Internet

  13. Computers and Peripherals: Desktop PCs/Servers

    E-Print Network [OSTI]

    Li, Teng

    Keyboards Network Devices Circuit Boards/Cards Media Speakers Mobile Devices: Cell Phones/Smart Phones Available, not customized) Meters, Scopes, etc. Acceptable Electronics for Recycling O ce and Telecommunica

  14. Interception and modification of network authentication packets with the purpose of allowing alternative authentication modes

    DOE Patents [OSTI]

    Kent, Alexander Dale (Los Alamos, NM)

    2008-09-02T23:59:59.000Z

    Methods and systems in a data/computer network for authenticating identifying data transmitted from a client to a server through use of a gateway interface system which are communicately coupled to each other are disclosed. An authentication packet transmitted from a client to a server of the data network is intercepted by the interface, wherein the authentication packet is encrypted with a one-time password for transmission from the client to the server. The one-time password associated with the authentication packet can be verified utilizing a one-time password token system. The authentication packet can then be modified for acceptance by the server, wherein the response packet generated by the server is thereafter intercepted, verified and modified for transmission back to the client in a similar but reverse process.

  15. E-Print Network 3.0 - advanced digital video Sample Search Results

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

    video systems of the future, we reconsider the commonly... , S. Paek, S. Pejhan, J. Smith, "Development of Advanced ImageVideo Servers in the Video On Demand... on Network...

  16. V-054: IBM WebSphere Application Server for z/OS Arbitrary Command...

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

    4: IBM WebSphere Application Server for zOS Arbitrary Command Execution Vulnerability V-054: IBM WebSphere Application Server for zOS Arbitrary Command Execution Vulnerability...

  17. V-166: HP-UX Directory Server Discloses Passwords to Remote Authentica...

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

    6: HP-UX Directory Server Discloses Passwords to Remote Authenticated and Local Users V-166: HP-UX Directory Server Discloses Passwords to Remote Authenticated and Local Users May...

  18. T-648: Avaya IP Office Manager TFTP Server Lets Remote Users...

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

    48: Avaya IP Office Manager TFTP Server Lets Remote Users Traverse the Directory T-648: Avaya IP Office Manager TFTP Server Lets Remote Users Traverse the Directory June 16, 2011 -...

  19. T-702: Apache web servers that allows a DOS attack | Department...

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

    2: Apache web servers that allows a DOS attack T-702: Apache web servers that allows a DOS attack August 25, 2011 - 8:00pm Addthis PROBLEM: A denial of service vulnerability has...

  20. U-106: Citrix XenServer Multiple Flaws in Web Self Service Have...

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

    6: Citrix XenServer Multiple Flaws in Web Self Service Have Unspecified Impact U-106: Citrix XenServer Multiple Flaws in Web Self Service Have Unspecified Impact February 17, 2012...

  1. T-602: BlackBerry Enterprise Server Input Validation Flaw in...

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

    02: BlackBerry Enterprise Server Input Validation Flaw in BlackBerry Web Desktop Manager Permits Cross-Site Scripting Attacks T-602: BlackBerry Enterprise Server Input Validation...

  2. Report to Congress on Server and Data Center Energy Efficiency: Public Law 109-431

    E-Print Network [OSTI]

    Brown, Richard; Alliance to Save Energy; ICF Incorporated; ERG Incorporated; U.S. Environmental Protection Agency

    2008-01-01T23:59:59.000Z

    cost-effective efficiency improvements in server and building operations be implemented before consideration of a DG/CHP investment.

  3. U-134: Apache Traffic Server Host Header Processing Flaw Lets Remote Users Deny Service

    Broader source: Energy.gov [DOE]

    A vulnerability was reported in Apache Traffic Server. A remote user can cause denial of service conditions.

  4. Windows Server 2012 R2 Licensing Datasheet

    E-Print Network [OSTI]

    Chaudhuri, Surajit

    automation plus storage and networking virtualization solutions based on industry-standard hardware. It lets you build, run, and scale applications that can move between your datacenter and the cloud, and allows-virtualized or lightly virtualized environments. Essentials edition for small businesses with up to 25 users running

  5. Why Blow Away Heat? Harvest Server's Heat Using Ther-moelectric Generators

    E-Print Network [OSTI]

    Huang, Polly

    Why Blow Away Heat? Harvest Server's Heat Using Ther- moelectric Generators Ted Tsung-Te Lai, Wei ABSTRACT This paper argues for harvesting energy from servers' wasted heat in data centers. Our approach is to distribute a large number of thermoelectric generators (TEGs) on or nearby server hotspot components whose

  6. CREATING SPECIFICATION TEMPLATES FOR CLIENT-SERVER FAMILIES IN SERVICE ORIENTED ARCHITECTURE

    E-Print Network [OSTI]

    CREATING SPECIFICATION TEMPLATES FOR CLIENT-SERVER FAMILIES IN SERVICE ORIENTED ARCHITECTURE-SERVER FAMILIES IN SERVICE ORIENTED ARCHITECTURE by Jaya Bansal has been approved July 2009 Graduate Supervisory-Server Based Service Oriented Architecture...............................9 2.4 Multi-tier Service Oriented

  7. Power Saving Design for Servers under Response Time Constraint Shengquan Wang

    E-Print Network [OSTI]

    Wang, Shengquan

    the server utilization is high. Instead we use PowerIdle power-saving scheme, which uses only DVS utility bill. For example, for a high-performance server with 330 Watt power consumption, the annual that the electricity cost remains significant even if the server does not always operate with the maximum power

  8. Cryptographic Strength of SSL/TLS Servers: Current and Recent Practices

    E-Print Network [OSTI]

    Lee, Homin K.

    Cryptographic Strength of SSL/TLS Servers: Current and Recent Practices Homin K. Lee Department (SSL) and its variant, Transport Layer Security (TLS), are used toward ensuring server se- curity. In this paper, we characterize the cryptographic strength of public servers running SSL/TLS. We present a tool

  9. Defend your data with broader, deeper server protection IBM ISS Threat Mitigation Services

    E-Print Network [OSTI]

    protection delivers multilayered intrusion preven- tion and detection to help protect your servers from of attacks, including those tunneling through encrypted Web transactions Combines multiple inspection® Server Intrusion Prevention System (IPS) and IBM RealSecure® Server Sensor. Each supports a broad range

  10. Video Server on an ATM Connected Cluster of Workstations Olav Sandsta, Stein Langrgen, and Roger Midtstraum

    E-Print Network [OSTI]

    Video Server on an ATM Connected Cluster of Workstations Olav Sandst°a, Stein Langřrgen, and Roger-7034 Trondheim, Norway folavsa, steinl, rogerg@idi.ntnu.no Abstract Video servers are important for applicationswhich make use of digital video. The video servers should provide better functionality than most

  11. 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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Regionat Cornell Batteries &NSTCurrent Issues &Network » Network

  12. Dynamical friction on satellite galaxies

    E-Print Network [OSTI]

    Michiko Fujii; Yoko Funato; Junichiro Makino

    2005-11-22T23:59:59.000Z

    For a rigid model satellite, Chandrasekhar's dynamical friction formula describes the orbital evolution quite accurately, when the Coulomb logarithm is chosen appropriately. However, it is not known if the orbital evolution of a real satellite with the internal degree of freedom can be described by the dynamical friction formula. We performed N-body simulation of the orbital evolution of a self-consistent satellite galaxy within a self-consistent parent galaxy. We found that the orbital decay of the simulated satellite is significantly faster than the estimate from the dynamical friction formula. The main cause of this discrepancy is that the stars stripped out of the satellite are still close to the satellite, and increase the drag force on the satellite through two mechanisms. One is the direct drag force from particles in the trailing tidal arm, a non-axisymmetric force that slows the satellite down. The other is the indirect effect that is caused by the particles remaining close to the satellite after escape. The force from them enhances the wake caused in the parent galaxy by dynamical friction, and this larger wake in turn slows the satellite down more than expected from the contribution of its bound mass. We found these two have comparable effects, and the combined effect can be as large as 20% of the total drag force on the satellite.

  13. SETTING INITIAL SECRET KEYS IN A MOBILE AD HOC NETWORK

    E-Print Network [OSTI]

    SETTING INITIAL SECRET KEYS IN A MOBILE AD HOC NETWORK Murat Cihan1 and C¸etin Kaya Ko¸c2,3 1 I@eecs.oregonstate.edu Abstract. Mobile ad hoc networks require specialized authentication protocols due to the mobility of users and lack of always-available trusted servers. There are a variety of mobile ad hoc authentication protocols

  14. Closed-loop real-time control on distributed networks

    E-Print Network [OSTI]

    Ambike, Ajit Dilip

    2004-11-15T23:59:59.000Z

    in presence of network delays and packet losses. A single actuator magnetic ball levitation system was used as a test bed to validate the proposed algorithm. A brief study of real-time requirements of the networked control system is presented and a client-server...

  15. Computer/Server Backup Policy 1.0 Purpose

    E-Print Network [OSTI]

    Demirel, Melik C.

    servers are included in the nightly backups. 3.0 Policy The College of Engineering's backup services the replicated storage back to provide for business continuity. The College of Engineering #12;· The services with an overview of backup services offered by Electronic and Computer Services (ECS). Backup services provide

  16. Secure Personal Data Servers: a Vision Paper Tristan Allard*,**

    E-Print Network [OSTI]

    Ray, Indrakshi

    Secure Personal Data Servers: a Vision Paper Tristan Allard*,** , Nicolas Anciaux* , Luc Bouganim, CO, USA {indrajit,iray}@cs.colostate.edu ABSTRACT An increasing amount of personal data by centralization. This paper suggests a radically different way of considering the management of personal data

  17. A Random Server Model for Private Information Retrieval or

    E-Print Network [OSTI]

    Goldwasser, Shafi

    model for PIR (or SPIR), which allows us to achieve significant improvements both in terms of securityA Random Server Model for Private Information Retrieval or How to Achieve Information Theoretic PIR, Cambridge, MA 02139, USA fshafi,talg@theory.lcs.mit.edu Abstract. Private information retrieval (PIR

  18. Energy Conservation Techniques for Disk Array-Based Servers

    E-Print Network [OSTI]

    Bianchini, Ricardo

    , we introduce a new conser- vation technique, called Popular Data Concentration (PDC), that migrates that takes advantage of PDC. In the context of this server, we compare PDC to the Massive Array of Idle Disks and a wide range of parame- ters. Our results for conventional disks show that PDC and MAID can only conserve

  19. Energy Conservation Techniques for Disk ArrayBased Servers

    E-Print Network [OSTI]

    Bianchini, Ricardo

    , we introduce a new conser­ vation technique, called Popular Data Concentration (PDC), that migrates that takes advantage of PDC. In the context of this server, we compare PDC to the Massive Array of Idle Disks and a wide range of parame­ ters. Our results for conventional disks show that PDC and MAID can only conserve

  20. Queueing systems subject to random server failures: an approximation

    E-Print Network [OSTI]

    Matis, Timothy

    1998-01-01T23:59:59.000Z

    In the traditional study of queueing theory, a typical ics. assumption is that the server is not subject to failures. This assumption, however, is not realistic for modeling many queueing systems in practice. Since the late 1950's, there has been...

  1. EMC PERSPECTIVE: THE POWER OF WINDOWS SERVER 2012 AND EMC

    E-Print Network [OSTI]

    Chaudhuri, Surajit

    EMC PERSPECTIVE: THE POWER OF WINDOWS SERVER 2012 AND EMC INFRASTRUCTURE FOR MICROSOFT PRIVATE and storage optimization features of intelligent storage arrays, such as the EMC® Symmetrix® VMAX® storage family, the EMC® VNX® series, and the EMC® Isilon® scale-out NAS family. With new technologies

  2. Task Assignment in a Server Farm with Switching Delays and

    E-Print Network [OSTI]

    Hyytiä, Esa

    costs Holding costs (per job) Objective to balance between Energy consumption Performance (e.g., latency Energy- and Delay-aware cost structure Switching costs Running costs Holding costs (per job) Objective to balance between Energy consumption Performance (e.g., latency) Heterogeneous servers, job-specific costs

  3. Mercury and Freon: Temperature Emulation and Management for Server Systems

    E-Print Network [OSTI]

    Bianchini, Ricardo

    Mercury and Freon: Temperature Emulation and Management for Server Systems Taliver Heath Dept by simulators and real measurements. In this paper, we introduce Mercury, a soft- ware suite that avoids data. Most importantly, Mercury runs the entire software stack natively, enables repeatable experiments

  4. Estimating the Service Time of Web Clients using Server Logs

    E-Print Network [OSTI]

    Freitag, Felix

    Estimating the Service Time of Web Clients using Server Logs Oscar Ardaiz Dep. Arquitectura de Freitag Dep. Arquitectura de Computadores Universidad Politécnica de Catalunya Jordi Girona, 1­3, Barcelona (España) felix@ac.upc.es Leandro Navarro Dep. Arquitectura de Computadores Universidad Politécnica

  5. Efficient Virtual Memory for Big Memory Servers Our analysis shows that many "big-memory" server workloads,

    E-Print Network [OSTI]

    Hill, Mark D.

    -memory" server workloads, such as databases, in-memory caches, and graph analytics, pay a high cost for page introduced [13]. In contrast, virtual memory usage has changed dramatically in recent years. For example-negligible energy [5, 41] To reevaluate the cost and benefit of decades-old page-based vir- tual memory in today

  6. "Zombie" Servers and Inefficiency Drive Energy Waste at Data Centers1 U.S. server facilities are riddled with underused machines, report says.2

    E-Print Network [OSTI]

    South Bohemia, University of

    progress in this area, some using upgraded systems that can generate power from waste heat or use outside"Zombie" Servers and Inefficiency Drive Energy Waste at Data Centers1 U.S. server facilities waste documented in a report about U.S. data centers released Tuesday by the Natural8 Resources Defense

  7. SetLink the CERN Document Server Link Manager

    E-Print Network [OSTI]

    Le Meur, Jean-Yves

    2000-01-01T23:59:59.000Z

    This paper analyses the problems encountered by electronic libraries to cope with long term keeping of on-line documents. What is thebest solution not to fill in a library system with non persistent addresses ? Different possible solutions are studied, based on theexperience of the CERN Document Server and its library. This paper will stress the importance of using a Link Manager for any long term Web server. It will explain how the CERN SetLink Link Manager is designed to handle a wide range of document types and formats, from photos in JPEG to eprints in PDF. It will also focus onother possibilities offered by using such an application, like automatic figures extraction or concatenation, full text searching andon-the-fly format conversions.

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

    DOE Patents [OSTI]

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

    2014-10-14T23:59:59.000Z

    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.

  9. Transportation Science and the Dynamics of Critical Infrastructure Networks with

    E-Print Network [OSTI]

    Nagurney, Anna

    Network Satellite and Undersea Cable Networks British Electricity Grid Transportation, Communication Automobiles, Trains, and Planes, Manufacturing and logistics Workstations, Distribution Points Processing Cables Radio Links Voice, Data, Video Energy Pumping Stations, Plants Pipelines, Transmission Lines Water

  10. Critical Infrastructure Networks and Supernetworks: New Tools for Dynamics,

    E-Print Network [OSTI]

    Nagurney, Anna

    Constellation Network Satellite and Undersea Cable Networks British Electricity Grid Transportation Automobiles, Trains, and Planes, Manufacturing and logistics Workstations, Distribution Points Processing Cables Radio Links Voice, Data, Video Energy Pumping Stations, Plants Pipelines, Transmission Lines Water

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

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

    process when shutting down the Directory Server. Multiple scripts set the LDLIBRARYPATH environment variable to an insecure value containing an empty path CVE-2011-0532. A...

  12. Asynchronous data change notification between database server and accelerator controls system

    SciTech Connect (OSTI)

    Fu, W.; Morris, J.; Nemesure, S.

    2011-10-10T23:59:59.000Z

    Database data change notification (DCN) is a commonly used feature. Not all database management systems (DBMS) provide an explicit DCN mechanism. Even for those DBMS's which support DCN (such as Oracle and MS SQL server), some server side and/or client side programming may be required to make the DCN system work. This makes the setup of DCN between database server and interested clients tedious and time consuming. In accelerator control systems, there are many well established software client/server architectures (such as CDEV, EPICS, and ADO) that can be used to implement data reflection servers that transfer data asynchronously to any client using the standard SET/GET API. This paper describes a method for using such a data reflection server to set up asynchronous DCN (ADCN) between a DBMS and clients. This method works well for all DBMS systems which provide database trigger functionality. Asynchronous data change notification (ADCN) between database server and clients can be realized by combining the use of a database trigger mechanism, which is supported by major DBMS systems, with server processes that use client/server software architectures that are familiar in the accelerator controls community (such as EPICS, CDEV or ADO). This approach makes the ADCN system easy to set up and integrate into an accelerator controls system. Several ADCN systems have been set up and used in the RHIC-AGS controls system.

  13. T-608: HP Virtual Server Environment Lets Remote Authenticated Users Gain Elevated Privileges

    Broader source: Energy.gov [DOE]

    A potential security vulnerability has been identified in HP Virtual Server Environment for Windows. The vulnerability could be exploited remotely to elevate privileges.

  14. Report to Congress on Server and Data Center Energy Efficiency: Public Law 109-431: Appendices

    E-Print Network [OSTI]

    Brown, Richard; Alliance to Save Energy; ICF Incorporated; ERG Incorporated; U.S. Environmental Protection Agency

    2008-01-01T23:59:59.000Z

    ftp/wp-reducing-datacenter-power-consumption.pdf Dietrich,of Knowledge: Server and Datacenter Energy Use – JonathanA-24 Project Manager, Datacenter Development Microsoft

  15. T-589: Citrix XenApp and Citrix Presentation Server Bug

    Broader source: Energy.gov [DOE]

    A vulnerability was reported in Citrix XenApp (Presentation Server). A remote user can execute arbitrary code on the target system.

  16. U-168: EMC Documentum Information Rights Management Server Bugs Let Remote Authenticated Users Deny Service

    Broader source: Energy.gov [DOE]

    Two vulnerabilities were reported in EMC Documentum Information Rights Management Server. A remote authenticated user can cause denial of service conditions.

  17. U-094: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated Privileges

    Broader source: Energy.gov [DOE]

    EMC Documentum Content Server contains a privilege elevation vulnerability that may allow an unauthorized user to obtain highest administrative privileges on the system.

  18. Report to Congress on Server and Data Center Energy Efficiency: Public Law 109-431

    E-Print Network [OSTI]

    Brown, Richard; Alliance to Save Energy; ICF Incorporated; ERG Incorporated; U.S. Environmental Protection Agency

    2008-01-01T23:59:59.000Z

    center equipment; any definition of energy efficiency willtoo many industry definitions of energy efficiency, theto refer to the definition of an "energy efficient" server

  19. E-Print Network 3.0 - afit air force Sample Search Results

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

    at the Air Force Institute of Technology (AFIT) have developed... on the satellite range scheduling problem, using data from the U.S. Air Force Satellite Control Network; a...

  20. Stochastic Dynamic Programming and Stochastic Fluid-Flow Models in the Design and Analysis of Web-Server Farms

    E-Print Network [OSTI]

    Goel, Piyush

    2010-10-12T23:59:59.000Z

    A Web-server farm is a specialized facility designed specifically for housing Web servers catering to one or more Internet facing Web sites. In this dissertation, stochastic dynamic programming technique is used to obtain the optimal admission...

  1. Dynamic Scheduling of a Parallel Server System in Heavy Traffic with Complete Resource Pooling: Asymptotic Optimality of a

    E-Print Network [OSTI]

    as the optimal cost in the Brownian control problem. Short title: Dynamic Scheduling of Parallel Servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3 Scheduling Control and Performance Measures . . . . . . . . . . . . . . . . . . . . . . . . 7Dynamic Scheduling of a Parallel Server System in Heavy Traffic with Complete Resource Pooling

  2. Mission-Critical Platform for Online Transaction Processing (OLTP) SQL Server 2008 Mission-Critical Platform for OLTP Data Solutions

    E-Print Network [OSTI]

    Bernstein, Phil

    Mission-Critical Platform for Online Transaction Processing (OLTP) SQL Server 2008 Mission Data Collector to troubleshoot and tune SQL Server 2008 instances. Help ensure compliance 2008 high- performance query processing engine for industry leading performance and scalability. Define

  3. Network Upgrade for the SLC: PEP II Network

    SciTech Connect (OSTI)

    Crane, M.; Call, M.; Clark, S.; Coffman, F.; Himel, T.; Lahey, T.; Miller, E.; Sass, R.; /SLAC

    2011-09-09T23:59:59.000Z

    The PEP-II control system required a new network to support the system functions. This network, called CTLnet, is an FDDI/Ethernet based network using only TCP/IP protocols. An upgrade of the SLC Control System micro communications to use TCP/IP and SLCNET would allow all PEP-II control system nodes to use TCP/IP. CTLnet is private and separate from the SLAC public network. Access to nodes and control system functions is provided by multi-homed application servers with connections to both the private CTLnet and the SLAC public network. Monitoring and diagnostics are provided using a dedicated system. Future plans and current status information is included.

  4. Energy Proportionality of an Enterprise Network Priya Mahadevan, Sujata Banerjee, and Puneet Sharma

    E-Print Network [OSTI]

    Badrinath, B. R.

    efficient. However, compared to other IT devices such as servers and laptops, energy ef- ficiencyEnergy Proportionality of an Enterprise Network Priya Mahadevan, Sujata Banerjee, and Puneet Sharma.banerjee@hp.com,puneet.sharma@hp.com ABSTRACT Energy efficiency is becoming increasingly important in the operation of networking infrastructure

  5. An evaluation of the storage systems based on network-attached disks

    E-Print Network [OSTI]

    Ma, Gang

    1998-01-01T23:59:59.000Z

    show that (a) The advantages of distributing the server's network processing workload to disks may be offset by the decreased cache hit ratios in a file system based on network-attached disks. (b) Performance can be significantly improved in a Web...

  6. Sun Fire X4800 Server View DetailsHide Details

    E-Print Network [OSTI]

    Stein, William

    $9,999.00 $10.00 $2,999.00 $9,999.00 $1,079.00 $0.00 $689.00 $0.00 $6,899.00 $576.00 $0.00 Sun Fire-SAS6-R-REM-Z Sun Storage SAS RAID Host Bus Adapter, 8 Ports of 6 Gb/sec and 512 MB Memory, Factory Integration 2 4460A-N Sun Blade Server Module Slot Filler Panel for Sun Blade Modular System Chassis, Factory

  7. Reverse SSL: Improved Server Performance and DoS Resistance for SSL Kemal BICAKCI

    E-Print Network [OSTI]

    1 Reverse SSL: Improved Server Performance and DoS Resistance for SSL Handshakes Kemal BICAKCI the performance and DoS resistance of SSL handshakes. In this paper, we tackle these two related problems by proposing reverse SSL, an extension in which the server is relieved from the heavy public key decryption

  8. Improving Secure Server Performance by Rebalancing SSL/TLS Claude Castelluccia, Einar Mykletun, Gene Tsudik

    E-Print Network [OSTI]

    Improving Secure Server Performance by Re­balancing SSL/TLS Handshakes Claude Castelluccia, Einar of each SSL handshake. Since most SSL­enabled servers use RSA, the burden of performing many costly to perform commensurately less work, thus resulting in better SSL throughput. Proposed tech­ niques are based

  9. A Random Server Model for Private Information How to Achieve Information Theoretic PIR

    E-Print Network [OSTI]

    Goldwasser, Shafi

    A Random Server Model for Private Information Retrieval or How to Achieve Information Theoretic PIR, Cambridge, MA 02139, USA fshafi,talg@theory.lcs.mit.edu Abstract. Private information retrieval (PIR the database managers. We propose a new model for PIR, utilizing auxiliary random servers to provide privacy

  10. Reducing the Servers' Computation in Private Information Retrieval: PIR with Preprocessing

    E-Print Network [OSTI]

    Beimel, Amos

    Reducing the Servers' Computation in Private Information Retrieval: PIR with Preprocessing #3; Amos Beimel y Yuval Ishai z Tal Malkin x June 9, 2003 Abstract Private information retrieval (PIR) enables of PIR. We show that in the standard PIR model, where the servers hold only the database, linear

  11. Reducing the Servers' Computation in Private Information Retrieval: PIR with Preprocessing

    E-Print Network [OSTI]

    Ishai, Yuval

    Reducing the Servers' Computation in Private Information Retrieval: PIR with Preprocessing #3; Amos Beimel y Yuval Ishai z Tal Malkin x January 26, 2006 Abstract Private information retrieval (PIR) enables of PIR. We show that in the standard PIR model, where the servers hold only the database, linear

  12. One-way Trapdoor Permutations Are Su cient for Non-Trivial Single-Server

    E-Print Network [OSTI]

    Ostrovsky, Rafail

    and the server sends n , cn K bits for any constant c, where K is the security parameter of the trapdoor@research.telcordia.com 1 #12;1 Introduction Private information retrieval PIR, for short is a communication protocol strongly relies on the algebraic properties of the quadratic residuosity problem. Other single-server PIR

  13. Oneway Trapdoor Permutations Are Sufficient for NonTrivial SingleServer

    E-Print Network [OSTI]

    Fiat, Amos

    ) bits and the server sends n \\Gamma cn K bits (for any constant c), where K is the security parameter­mail rafail@research.telcordia.com 1 #12; 1 Introduction Private information retrieval (PIR, for short properties of the quadratic residuosity problem. Other single­server PIR protocols which are based

  14. An Approach to Select a Best Suitable Video Server Falko Dressler

    E-Print Network [OSTI]

    Breu, Ruth

    on the availability and the achieved transmission quality are very high. Therefore, multiple video servers called client, is requested to choose one of these servers for the particular transmission. Several transmission. New approaches are in progress, which allow a more meaningful selection. For example

  15. JETC: Joint Energy Thermal and Cooling Management for Memory and CPU Subsystems in Servers

    E-Print Network [OSTI]

    Simunic, Tajana

    JETC: Joint Energy Thermal and Cooling Management for Memory and CPU Subsystems in Servers Raid In this work we propose a joint energy, thermal and cooling management technique (JETC) that significantly re- duces per server cooling and memory energy costs. Our analysis shows that decoupling the optimization

  16. On improving performance and conserving power in cluster-based web servers

    E-Print Network [OSTI]

    Vageesan, Gopinath

    2007-04-25T23:59:59.000Z

    forward client requests to a balanced set of waiting servers in complete transparency to the clients. The policy employed in forwarding requests from the front-end distributor to the backend servers plays an important role in the overall system performance...

  17. High performance digital video servers: storage and retrieval of compressed scalable video

    E-Print Network [OSTI]

    Chang, Shih-Fu

    High performance digital video servers: storage and retrieval of compressed scalable video Seungyup compressiontechnologyhave ledto the emergence ofunprecedented forms of video communications. In the future, it is envisioned that users will be able to connect to a massive number of distributed video servers, from which users

  18. On Optimal Policies for Energy-Aware Servers Vincent J. Maccio

    E-Print Network [OSTI]

    Down, Doug

    or lower energy state as turning the server on or off, respectively. Jobs arrive to the system accordingOn Optimal Policies for Energy-Aware Servers Vincent J. Maccio Department of Computing and Software of Computing and Software McMaster University Hamilton, Ontario Email downd@mcmaster.ca Abstract--As energy

  19. E-Print Network 3.0 - ashkenazi jewish women Sample Search Results

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

    individuals. At the haplogroup... , a more detailed pattern was observed. Single-step micro- satellite networks of Arab and Jewish haplotypes... with the paternally inherited...

  20. SERVER DEVELOPMENT FOR NSLS-II PHYSICS APPLICATIONS AND PERFORMANCE ANALYSIS

    SciTech Connect (OSTI)

    Shen, G.; Kraimer, M.

    2011-03-28T23:59:59.000Z

    The beam commissioning software framework of NSLS-II project adopts a client/server based architecture to replace the more traditional monolithic high level application approach. The server software under development is available via an open source sourceforge project named epics-pvdata, which consists of modules pvData, pvAccess, pvIOC, and pvService. Examples of two services that already exist in the pvService module are itemFinder, and gather. Each service uses pvData to store in-memory transient data, pvService to transfer data over the network, and pvIOC as the service engine. The performance benchmarking for pvAccess and both gather service and item finder service are presented in this paper. The performance comparison between pvAccess and Channel Access are presented also. For an ultra low emittance synchrotron radiation light source like NSLS II, the control system requirements, especially for beam control are tight. To control and manipulate the beam effectively, a use case study has been performed to satisfy the requirement and theoretical evaluation has been performed. The analysis shows that model based control is indispensable for beam commissioning and routine operation. However, there are many challenges such as how to re-use a design model for on-line model based control, and how to combine the numerical methods for modeling of a realistic lattice with the analytical techniques for analysis of its properties. To satisfy the requirements and challenges, adequate system architecture for the software framework for beam commissioning and operation is critical. The existing traditional approaches are self-consistent, and monolithic. Some of them have adopted a concept of middle layer to separate low level hardware processing from numerical algorithm computing, physics modelling, data manipulating and plotting, and error handling. However, none of the existing approaches can satisfy the requirement. A new design has been proposed by introducing service oriented architecture technology, and client interface is undergoing. The design and implementation adopted a new EPICS implementation, namely epics-pvdata [9], which is under active development. The implementation of this project under Java is close to stable, and binding to other language such as C++ and/or Python is undergoing. In this paper, we focus on the performance benchmarking and comparison for pvAccess and Channel Access, the performance evaluation for 2 services, gather and item finder respectively.

  1. Real-time communication in FDDI-based networks

    E-Print Network [OSTI]

    Kumar, Amit Virendra

    1995-01-01T23:59:59.000Z

    for guaranteeing end-to-end message deadlines at the application level on an FDDI network. The concept of a Synchronous Server is introduced to eliminate the restriction of one message stream per node. The subsequent problems faced in bandwidth allocation...

  2. Abstract--Network security against possible attacks involves making decisions under uncertainty. Not only may one be

    E-Print Network [OSTI]

    ], security in wireless networks [12], [13] and cyber-security [14], [15], [16]. In [17] the readers can find1 Abstract--Network security against possible attacks involves making decisions under uncertainty for a further DDoS (Distributed Denial of Service) botnet attack on servers). Due to limited defense

  3. Centralized route recovery based on multi-hop wakeup time estimation for wireless sensor networks with ultra low duty cycles

    E-Print Network [OSTI]

    Bahk, Saewoong

    of smart-meters that are interconnected to construct meshed wireless sensor networks. A smart meter data from each smart-meter are gathered into concentrators, and delivered to AMI (Advanced Metering Infrastructure) server through PLC (Power Line Communication) or public wireless networks. Since the smart-meter

  4. GlusterFS One Storage Server to Rule Them All

    SciTech Connect (OSTI)

    Boyer, Eric B. [Los Alamos National Laboratory; Broomfield, Matthew C. [Los Alamos National Laboratory; Perrotti, Terrell A. [Los Alamos National Laboratory

    2012-07-30T23:59:59.000Z

    GlusterFS is a Linux based distributed file system, designed to be highly scalable and serve many clients. Some reasons to use GlusterFS are: No centralized metadata server, Scalability, Open Source, Dynamic and live service modifications, Can be used over Infiniband or Ethernet, Can be tuned for speed and/or resilience and Flexible administration. It's useful for enterprise environments - virtualization; high performance computing (HPC) and it works with Mac, Linux and Windows clients. Conclusions are: (1) GlusterFS proved to have widespread capabilities as a virtual file system; (2) Scalability is very dependent upon the underlying hardware; (3) Lack of built-in encryption and security paradigm; and (4) Best suited in a general purpose computing environment.

  5. 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.

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

    SciTech Connect (OSTI)

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

    2014-02-01T23:59:59.000Z

    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.

  7. 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

  8. 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

  9. Multi-mode Energy Management for Multi-tier Server Tibor Horvath

    E-Print Network [OSTI]

    Skadron, Kevin

    Multi-mode Energy Management for Multi-tier Server Clusters Tibor Horvath tibor Charlottesville, VA 22904 ABSTRACT This paper presents an energy management policy for recon- figurable clusters General Terms Algorithms, Design, Experimentation, Management, Perfor- mance Keywords energy management

  10. CSDSim: A didactic processor simulation environment based on the client / server

    E-Print Network [OSTI]

    Wagner, Flávio Rech

    CSDSim: A didactic processor simulation environment based on the client / server architecture CSDSim, a didactic environment for teaching and evaluating processor organizations using the DLX95]. The main objective of CSDSim is to provide a flexible, didactic simulation environment

  11. T-692: VMware vFabric tc Server Lets Remote Users Login Using...

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

    Support & Downloads (2.0.6.RELEASE, 2.1.2.RELEASE). Addthis Related Articles V-013: EMC Avamar Client for VMware Discloses Server Password to Local Users T-575: OpenLDAP...

  12. T-640: RSA Access Manager Server CVE-2011-0322 Update | Department...

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

    7, 2011 - 5:18pm Addthis PROBLEM: ESA-2011-009 (revised): RSA, The Security Division of EMC, announces new fix for potential security vulnerability in RSA Access Manager Server....

  13. A simulation model of a multi-server EJB system David Mc Guinness,

    E-Print Network [OSTI]

    A simulation model of a multi-server EJB system David Mc Guinness, Performance Engineering sparse. This paper will describe how WorkbenchTM , an advanced simulation modelling tool, can be used

  14. Satellite-based laser windsounder

    SciTech Connect (OSTI)

    Schultz, J.F.; Czuchlewski, S.J.; Quick, C.R. [and others

    1997-08-01T23:59:59.000Z

    This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The project`s primary objective is to determine the technical feasibility of using satellite-based laser wind sensing systems for detailed study of winds, aerosols, and particulates around and downstream of suspected proliferation facilities. Extensive interactions with the relevant operational organization resulted in enthusiastic support and useful guidance with respect to measurement requirements and priorities. Four candidate wind sensing techniques were evaluated, and the incoherent Doppler technique was selected. A small satellite concept design study was completed to identify the technical issues inherent in a proof-of-concept small satellite mission. Use of a Mach-Zehnder interferometer instead of a Fabry-Perot would significantly simplify the optical train and could reduce weight, and possibly power, requirements with no loss of performance. A breadboard Mach-Zehnder interferometer-based system has been built to verify these predictions. Detailed plans were made for resolving other issues through construction and testing of a ground-based lidar system in collaboration with the University of Wisconsin, and through numerical lidar wind data assimilation studies.

  15. Network Management Network Management

    E-Print Network [OSTI]

    that pertain to the operation, administration, maintenance, and provisioning of networked systems · Operation deals with keeping the network up (and the service provided by the network) · Administration involvesNetwork Management Pag. 1 Network Management Andrea Bianco Telecommunication Network Group Network

  16. NETWORKS FOR FUN Anna NagurneyAnna Nagurney

    E-Print Network [OSTI]

    Nagurney, Anna

    ;Copyright 2000 Anna Nagurney Satellite and Undersea Cable Networks #12;Copyright 2000 Anna Nagurney Energy New England Electric Power Network #12;Copyright 2000 Anna Nagurney Duke Energy Gas Pipeline Network, and Planes, Manufacturing and logistics Workstations, Distribution Points Processing, Shipment Components

  17. Operations Research and the Captivating Study of Networks

    E-Print Network [OSTI]

    Nagurney, Anna

    with Applications to Critical Infrastructure Networks #12;What is Operations Research (OR)? Operations research of Common Physical Networks Network System Nodes Links Flows Transportation Intersections, Homes, Workplaces Computers, Satellites, Telephone Exchanges Fiber Optic Cables Radio Links Voice, Data, Video Energy Pumping

  18. Operations Research and the Captivating Study of Networks

    E-Print Network [OSTI]

    Nagurney, Anna

    Infrastructure Networks #12;What is Operations Research (OR)? Operations research is a scientific approach of Common Physical Networks Network System Nodes Links Flows Transportation Intersections, Homes, Workplaces Computers, Satellites, Telephone Exchanges Fiber Optic Cables Radio Links Voice, Data, Video Energy Pumping

  19. U-012: BlackBerry Enterprise Server Collaboration Service Bug Lets Remote Users Impersonate Intra-organization Messages

    Broader source: Energy.gov [DOE]

    A vulnerability was reported in BlackBerry Enterprise Server. A remote user can impersonate another messaging user within the same organization.

  20. Scalable Networking for Cloud Datacenters

    E-Print Network [OSTI]

    CERN. Geneva

    2010-01-01T23:59:59.000Z

    Andy will discuss the architectural evolution of Ethernet networks and switch architectures as they are being designed to address much larger cloud networking applications that require predictable throughput and latency.About the speakerAs Chief Development Officer, Andy Bechtolsheim is responsible for the overall product development and technical direction of Arista Networks.Previously Andy was a Founder and Chief System Architect at Sun Microsystems, where most recently he was responsible for industry standard server architecture. Andy was also a Founder and President of Granite Systems, a Gigabit Ethernet startup acquired by Cisco Systems in 1996. From 1996 until 2003 Andy served as VP/GM of the Gigabit Systems Business Unit at Cisco that developed the very successful Catalyst 4500 family of switches. Andy was also a Founder and President of Kealia, a next generation server company acquired by Sun in 2004.Andy received an M.S. in Computer Engineering from Carnegie Mellon University in 1976 and was a Ph.D. ...

  1. Satellite Ecology: The Dearth of Environment Dependence

    E-Print Network [OSTI]

    Frank C. van den Bosch; Anna Pasquali; Xiaohu Yang; H. J. Mo; Simone Weinmann; Daniel H. McIntosh; Daniel Aquino

    2008-05-01T23:59:59.000Z

    Using the Sloan Digital Sky Survey (SDSS) galaxy group catalogue of Yang et al. (2007), we study the average colour and average concentration of satellite galaxies as function of (i) their stellar mass, (ii) their group mass, and (iii) their group-centric radius. We find that the colours and concentrations of satellite galaxies are (almost) completely determined by their stellar mass. In particular, at fixed stellar mass, the average colours and concentrations of satellite galaxies are independent of either halo mass or halo-centric radius. We find clear evidence for mass segregation of satellite galaxies in haloes of all masses, and argue that this explains why satellites at smaller halo-centric radii are somewhat redder and somewhat more concentrated. In addition, the weak colour and concentration dependence of satellite galaxies on halo mass is simply a reflection of the fact that more massive haloes host, on average, more massive satellites. Combining these results with the fact that satellite galaxies are, on average, redder and somewhat more concentrated than central galaxies of the same stellar mass, the following picture emerges: galaxies become redder and somewhat more concentrated once they fall into a bigger halo (i.e., once they become a satellite galaxy). This is a clear manifestation of environment dependence. However, there is no indication that the magnitude of the transformation (or its timescale) depends on environment; a galaxy undergoes a transition when it becomes a satellite, but it does not matter whether it becomes a satellite of a small (Milky Way sized) halo, or of a massive cluster. We discuss the implication of this `dearth' of environment dependence for the physical processes responsible for transforming satellite galaxies.

  2. Integrated Solar Panel Antennas for Cube Satellites.

    E-Print Network [OSTI]

    Mahmoud, Mahmoud N.

    2010-01-01T23:59:59.000Z

    ??This thesis work presents an innovative solution for small satellite antennas by integrating slot antennas and solar cells on the same panel to save small… (more)

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

    E-Print Network [OSTI]

    Wadsworth, Brandon Scott

    2012-06-07T23:59:59.000Z

    CHARACTERIZING SWITCHING PROBLEMS IN LOW EARTH ORBIT SATELLITE CONSTELLATIONS WITH SATELLITE FAILURES A Thesis by BRANDON SCOTT WADSWORTH Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1999 Major Subject: Computer Science CHARACTERIZING SWITCHING PROBLEMS IN LOW EARTH ORBIT SATELLITE CONSTELLATIONS WITH SATELLITE FAILURES A Thesis By BRANDON SCOTT WADSWORTH Submitted to Texas...

  4. Dynamics of the Galaxy's Satellites

    E-Print Network [OSTI]

    James Binney

    2000-06-28T23:59:59.000Z

    The Milky Way's satellites provide unique information about the density of the Galactic halo at large radii. The inclusion of even a few rather inaccurate proper motions resolves an ambiguity in older mass estimates in favour of higher values. Many of the satellites are concentrated into streams. The dynamics of the Magellanic Stream provided an early indication that the halo reaches out to beyond 100 kpc. Tidal forces between the Clouds are currently disturbing the Clouds' internal dynamics. One would expect this damage to worsen rapidly as the tidal field of the MW excites the eccentricity of the Clouds' mutual orbit. This process, which has yet to be completely modelled, is important for understanding the degree of self-lensing in searches for gravitational lensing events. The Sagittarius Dwarf galaxy very likely contributes significantly to the Galactic warp. The direction of the warp's line of nodes is incorrectly predicted by the simplest models of the Dwarf's orbit. More sophisticated models, in which a complex distribution of stripped dark matter is predicted, may be more successful.

  5. Assessing the Vulnerability of Replicated Network George Dean Bissias, Brian Neil Levine, and Ramesh K. Sitaraman

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    , and Ramesh K. Sitaraman Dept. of Computer Science, Univ. of Massachusetts Amherst, USA {gbiss% of the substations from all generators; on a large wireless mesh network disrupting 5% of wireless links between autonomous systems (i.e., servers). In a power grid, each substation (i.e., client) connects to one

  6. Massachusetts Institute of Technology Handout 4 6.857: Network and Computer Security March 11, 2013

    E-Print Network [OSTI]

    Gummadi, Ramakrishna

    Massachusetts Institute of Technology Handout 4 6.857: Network and Computer Security March 11, 2013 anonymously, please note this in your profile on the homework submission website. Problem 3-1. Side . . . 10000] (it might take a bit to load the triples for a large num). Also, feel free to query the server

  7. FEASIBILITY OF MULTI-VIEW VIDEO STREAMING OVER P2P NETWORKS Engin Kurutepe, Thomas Sikora

    E-Print Network [OSTI]

    Wichmann, Felix

    to home entertainment systems, just like movies migrated from movie theaters to our TV-sets. Therefore with the convergence of tele- phony and TV communications to IP-networks, the authors expect IP-only delivery of 3-D for the bandwidth load to be lifted from the server and distributed among peers. Although P2P streaming has been

  8. Evaluating the Impact of Data Center Network Architectures on Application Performance in

    E-Print Network [OSTI]

    Kuzmanovic, Aleksandar

    architecture classes and shed a new light on the impact of server virtualization on DCN's and applicationEvaluating the Impact of Data Center Network Architectures on Application Performance [2]) received a surge of interest from both the industry and academia. However, none of existing

  9. Scheduling Data Delivery in Heterogeneous Wireless Sensor Networks Daeseob Lim1

    E-Print Network [OSTI]

    Simunic, Tajana

    to the internet backbone for further analysis and storage. Quality of service (QoS) is an important issue and tracking temperature distributions of server racks to studying wildlife and aiding military in warfare. Although much of the research on WSNs has been primarily focused on design of homogeneous networks

  10. PowerSleep: A Smart Power-Saving Scheme with Sleep for Servers under Response Time Constraint

    E-Print Network [OSTI]

    Wang, Shengquan

    the cost of the power delivery subsystems and the cooling facility, the electricity cost is significant power consumption by 50100% [14]. Given the fact that average server utilization is only 2030PowerSleep: A Smart Power-Saving Scheme with Sleep for Servers under Response Time Constraint

  11. Improving Secure Server Performance by Re-balancing SSL/TLS Claude Castelluccia, Einar Mykletun, Gene Tsudik

    E-Print Network [OSTI]

    Improving Secure Server Performance by Re-balancing SSL/TLS Handshakes Claude Castelluccia, Einar of each SSL handshake. Since most SSL-enabled servers use RSA, the burden of performing many costly to perform commensurately less work, thus resulting in better SSL throughput. Proposed tech- niques are based

  12. Static and dynamic relationships in WebSphere Process Server and WebSphere ESB V7

    E-Print Network [OSTI]

    Static and dynamic relationships in WebSphere Process Server and WebSphere ESB V7 Using@uk.ibm.com) z/OS SVT Team Lead IBM 15 Sep 2010 Learn how to build mediation flows containing static and dynamic. Example scenario Static and dynamic relationships in WebSphere Process Server and WebSphere ESB V7

  13. Want to Install A Satellite Dish ?

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    listed below to ensure proper installation of your dish. 1. Permanent alterations or modification utility lines would be interfered with by satellite dish post installation. 6. Entry into the unit in case of nearby utility lines or other factors. 3--Point of entry for satellite dish cable

  14. Satellite Eye for Galathea 3 -Slutrapport

    E-Print Network [OSTI]

    Satellite Eye for Galathea 3 - Slutrapport Charlotte Bay Hasager, Peter Brøgger Sørensen, Jacob L Abstract (in English) (max. 2000 char.): The Satellite Eye for Galathea 3 project started on the 10th March August 2006. The expedition lasted in total 256 days (8 months), and the Satelitte Eye project continued

  15. Satellite Application Facility for Numerical Weather Prediction

    E-Print Network [OSTI]

    Stoffelen, Ad

    into Numerical Weather Prediction (NWP) models. However, the impact of such observations often critNWP SAF Satellite Application Facility for Numerical Weather Prediction Document NWPSAF-KN-VS-002 Stoffelen KNMI #12;NWP SAF Satellite Application Facility for Numerical Weather Prediction Report

  16. Satellite Navigation Integrity Assurance: Lessons Learned

    E-Print Network [OSTI]

    Stanford University

    Satellite Navigation Integrity Assurance: Lessons Learned from Hurricane Katrina ION GNSS 2008 by the FAA Satellite Navigation Program Office #12;17 September 2008 Lessons Learned from Hurricane Katrina 2 for probabilistic modeling and analysis #12;17 September 2008 Lessons Learned from Hurricane Katrina 3 Key Sources

  17. Intelligent Sensor Placement for Hot Server Detection in Data Centers

    E-Print Network [OSTI]

    Xing, Guoliang

    center energy consumption in the US will grow to over 100 billion kWh at a cost of $7.4 billion by 2011, IEEE Abstract--Recent studies have shown that a significant portion of the total energy consumption temperature set points to overcool the entire room, resulting in excessive energy consumption. Sensor network

  18. Report to Congress on Server and Data Center Energy Efficiency: Public Law 109-431

    SciTech Connect (OSTI)

    Alliance to Save Energy; ICF Incorporated; ERG Incorporated; U.S. Environmental Protection Agency; Brown, Richard E; Brown, Richard; Masanet, Eric; Nordman, Bruce; Tschudi, Bill; Shehabi, Arman; Stanley, John; Koomey, Jonathan; Sartor, Dale; Chan, Peter; Loper, Joe; Capana, Steve; Hedman, Bruce; Duff, Rebecca; Haines, Evan; Sass, Danielle; Fanara, Andrew

    2007-08-02T23:59:59.000Z

    This report was prepared in response to the request from Congress stated in Public Law 109-431 (H.R. 5646),"An Act to Study and Promote the Use of Energy Efficient Computer Servers in the United States." This report assesses current trends in energy use and energy costs of data centers and servers in the U.S. (especially Federal government facilities) and outlines existing and emerging opportunities for improved energy efficiency. It also makes recommendations for pursuing these energy-efficiency opportunities broadly across the country through the use of information and incentive-based programs.

  19. Report to Congress on Server and Data Center Energy Efficiency: Public Law 109-431: Appendices

    SciTech Connect (OSTI)

    Alliance to Save Energy; ICF Incorporated; ERG Incorporated; U.S. Environmental Protection Agency; Brown, Richard E; Brown, Richard; Masanet, Eric; Nordman, Bruce; Tschudi, Bill; Shehabi, Arman; Stanley, John; Koomey, Jonathan; Sartor, Dale; Chan, Peter; Loper, Joe; Capana, Steve; Hedman, Bruce; Duff, Rebecca; Haines, Evan; Sass, Danielle; Fanara, Andrew

    2007-08-02T23:59:59.000Z

    This report is the appendices to a companion report, prepared in response to the request from Congress stated in Public Law 109-431 (H.R. 5646),"An Act to Study and Promote the Use of Energy Efficient Computer Servers in the United States." This report assesses current trends in energy use and energy costs of data centers and servers in the U.S. (especially Federal government facilities) and outlines existing and emerging opportunities for improved energy efficiency. It also makes recommendations for pursuing these energy-efficiency opportunities broadly across the country through the use of information and incentive-based programs.

  20. Capture of Irregular Satellites at Jupiter

    E-Print Network [OSTI]

    Nesvorny, D; Deienno, R

    2014-01-01T23:59:59.000Z

    The irregular satellites of outer planets are thought to have been captured from heliocentric orbits. The exact nature of the capture process, however, remains uncertain. We examine the possibility that irregular satellites were captured from the planetesimal disk during the early Solar System instability when encounters between the outer planets occurred (Nesvorny, Vokrouhlicky & Morbidelli 2007, AJ 133; hereafter NVM07). NVM07 already showed that the irregular satellites of Saturn, Uranus and Neptune were plausibly captured during planetary encounters. Here we find that the current instability models present favorable conditions for capture of irregular satellites at Jupiter as well, mainly because Jupiter undergoes a phase of close encounters with an ice giant. We show that the orbital distribution of bodies captured during planetary encounters provides a good match to the observed distribution of irregular satellites at Jupiter. The capture efficiency for each particle in the original transplanetary d...

  1. Resource Allocation Techniques to Improve the Performance of Wireless Networks

    E-Print Network [OSTI]

    Arslan, Mustafa Yasir

    2012-01-01T23:59:59.000Z

    In comparison to a datacenter server, the power consumptionmagnitude) than using typical datacenter servers. 6.4 Design

  2. SciTech Connect: Hydrogen peroxide propulsion for smaller satellites...

    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...

  3. Gas Shepherding by an Infalling Satellite

    E-Print Network [OSTI]

    P. Chang

    2008-05-22T23:59:59.000Z

    I calculate the action of a satellite, infalling through dynamical friction, on a coplanar gaseous disk of finite radial extent. The disk tides, raised by the infalling satellite, couple the satellite and disk. Dynamical friction acting on the satellite then shrinks the radius of the coupled satellite-disk system. Thus, the gas is ``shepherded'' to smaller radii. In addition, gas shepherding produces a large surface density enhancement at the disk edge. If the disk edge then becomes gravitationally unstable and fragments, it may give rise to enhanced star formation. On the other hand, if the satellite is sufficiently massive and dense, the gas may be transported from $\\sim 100$ pc to inside of a 10 to 10s of parsecs before completely fragmenting into stars. I argue that gas shepherding may drive the fueling of active galaxies and central starbursts and I compare this scenario to competing scenarios. I argue that sufficiently large and dense super star clusters (acting as the shepherding satellites) can shepherd a gas disk down to ten to tens of parsecs. Inside of ten to tens of parsecs, another mechanism may operate, i.e., cloud-cloud collisions or a marginally (gravitationally) stable disk, that drives the gas $\\lesssim 1$ pc, where it can be viscously accreted, feeding a central engine.

  4. Chasing the FLP Impossibility Result in a LAN How Robust Can a Fault Tolerant Server Be?

    E-Print Network [OSTI]

    DĂ©fago, Xavier

    parameter is the time- out used by our heartbeat failure detectors. The frequency of heartbeats is keptChasing the FLP Impossibility Result in a LAN or How Robust Can a Fault Tolerant Server Be? P proven an impossibility result about consensus in the asyn- chronous system model, and similar

  5. Prototype for a IEC 61400-25 Compliant Generic Server Supervisors

    E-Print Network [OSTI]

    .g. the new IEC 61400- 25 defines protocols for communication, control, and monitoring of wind power plants vind mølle. (Wind Power Plant - WPP). Denne standart består af en lang række obligatoriske og server for a common wind power plant standard. The main focus is on evaluating possible solutions

  6. Power Saving Design for Servers under Response Time Constraint Shengquan Wang

    E-Print Network [OSTI]

    Wang, Shengquan

    utilization is high, where instead we use PowerIdle power-saving scheme with DVS only. By modeling the system the cost of the power delivery subsystems and the cooling facility, the electricity cost is significantPower Saving Design for Servers under Response Time Constraint Shengquan Wang Department

  7. Client-Server Semantic Binary Database: Design and Development Konstantin Beznosov

    E-Print Network [OSTI]

    Performance Database Research Center. The prototype will be referenced further as DBMS. The remainder of this paper is organized as follows. Section 2 describes the architecture of the DBMS. Section 3 presents the design of client-server version of the DBMS. Details of the implementation are ex- plored in Section 4

  8. Dynamic Voltage Scaling in Multitier Web Servers with End-to-End Delay Control

    E-Print Network [OSTI]

    Skadron, Kevin

    -to-end delay constraints. The service is shown to consume as much as 30 percent less energy compared. The energy (and cooling) costs of large server farms are reported to be a significant part of their total for minimizing the total energy expenditure of the multistage pipeline subject to soft end-to-end response

  9. Reducing the Servers' Computation in Private Information Retrieval: PIR with Preprocessing

    E-Print Network [OSTI]

    Beimel, Amos

    Reducing the Servers' Computation in Private Information Retrieval: PIR with Preprocessing Amos Beimel Yuval Ishai Tal Malkin§ June 12, 2003 Abstract Private information retrieval (PIR) enables a user if the user requires only a single bit. In this paper, we study the computational complexity of PIR. We show

  10. Risk Management for Video-on-Demand Servers leveraging Demand Forecast

    E-Print Network [OSTI]

    Li, Baochun

    Risk Management for Video-on-Demand Servers leveraging Demand Forecast Di Niu, Hong Xu, Baochun Li on demand history using time se- ries forecasting techniques. The prediction enables dynamic and efficient}@eecg.toronto.edu Shuqiao Zhao Multimedia Development Group UUSee, Inc. shuqiao.zhao@gmail.com ABSTRACT Video-on-demand (Vo

  11. Dynamic Management of Internet Telephony Servers: A Case Study based on JavaBeans and JDMK

    E-Print Network [OSTI]

    management systems. The results of our work allow us to evaluate JDMK regarding its suitability for the mana such as CORBA and JavaBeans are gaining in- creasing importance for the integrated management of net- worksDynamic Management of Internet Telephony Servers: A Case Study based on JavaBeans and JDMK

  12. GreenCoop: Cooperative Green Routing with Energy-efficient Servers

    E-Print Network [OSTI]

    Matta, Abraham "Ibrahim"

    GreenCoop: Cooperative Green Routing with Energy-efficient Servers Luca Chiaraviglio Dipartimento Science Department Boston University - USA matta@cs.bu.edu ABSTRACT Energy-efficient communication has. INTRODUCTION Energy-efficient communication has become a sensible prob- lem in the last few years. According

  13. RspSim A Simulation Model of the Reliable Server Pooling Framework

    E-Print Network [OSTI]

    Dreibholz, Thomas

    RspSim ­ A Simulation Model of the Reliable Server Pooling Framework Thomas Dreibholz, Martin Becke--This code contribution paper provides an overview of the RSPSIM model, which is a simulation model. Clearly, in order to evaluate RSerPool, an OMNET++-based simulation model ­ called RSPSIM ­ had been

  14. E-Print Network 3.0 - analysis browsing server Sample Search...

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

    >> 1 UBB Mining: Finding Unexpected Browsing Behaviour in Clickstream Data to Improve a Web Site's Design Summary: algorithm can discover the relationship between different user's...

  15. Providing Network Video Service to Mobile Clients 1 Bruce A. Mah, Srinivasan Seshan, Kimberly Keeton, Randy H. Katz, Domenico Ferrari

    E-Print Network [OSTI]

    California at Berkeley, University of

    Providing Network Video Service to Mobile Clients 1 Bruce A. Mah, Srinivasan Seshan, Kimberly server'' which retrieves video sequences on demand for playback on the displays of hand­held, portable, and the International Computer Science Institute. Bruce A. Mah was supported by an NSF Graduate Fellowship. Kimberly

  16. The case for P2P Mobile Video System over wireless networks: A practical study of Challenges

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    for mobile videos. According to Cisco Visual Net- working Index [1], mobile video traffic exceeded 50 percent, memory, energy capacity, etc.) that make it impossible to simply extend conclusions drawn on non diffusion market over Internet by reducing the load on servers and better adapting to network capacity

  17. Synthetic Aperture Radar Interferometry with 3 satellites

    E-Print Network [OSTI]

    Wong, Wallace D. (Wallace Dazheng)

    2005-01-01T23:59:59.000Z

    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 ...

  18. Emerging trends in the satellite industry

    E-Print Network [OSTI]

    Salazar, Vagn Knudsen

    2012-01-01T23:59:59.000Z

    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 ...

  19. Satellite streamfunction analysis for the California current

    E-Print Network [OSTI]

    Arango, Hernan Guillermo

    1987-01-01T23:59:59.000Z

    SATELLITE STREAMFUNCTION ANALYSIS FOR THE CALIFORNIA CURRENT A Thesis by HERNAN GUILLERMO ARANGO Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August... 1987 Major Subject: Oceanography SATELLITE STREAMFUNCTION ANALYSIS FOR THE CALIFORNIA CURRENT A Thesis by HERNAN GUILLERMO ARANGO Approved as to style and content by Andrew C. Vastano (Chairman of Committee) Robert O. Reid (Member) Geor e L...

  20. aqua modis satellite: Topics by E-print Network

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

    over land and open ocean. Overall, the Dark Ocean algorithm overestimates-surface wind speed from Modern Era Retrospective-Analysis for Research and Applications (MERRA) to...

  1. astronomical satellite galaxy: Topics by E-print Network

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

    THE ASTROPHYSICAL JOURNAL, 524:746752, 1999 October 20 1999. The American Astronomical Society. All rights reserved. Printed in U.S.A.( Physics Websites Summary: (L X B 1.1 ...

  2. amateur radio satellite: Topics by E-print Network

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

    Australia. 9 Furman University, Greenville, South Gwinn, Carl 87 The orbit of the Chelyabinsk event impactor as reconstructed from amateur and public footage CERN Preprints...

  3. Dynamic channel allocation in satellite and wireless networks

    E-Print Network [OSTI]

    Sun, Jun, 1975-

    2007-01-01T23:59:59.000Z

    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 ...

  4. anti-satellite defence: Topics by E-print Network

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

    onto existing salinity variations in a semi-enclosed brackish water body such as the Baltic Sea, a decrease in salinity is predicted due DeWitt, Thomas J. 50 EVOLUTIONARY...

  5. ariel satellites: Topics by E-print Network

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

    of the protein backbone is locally hampered by formation of an intramolecular hydrogen bond which Berry, R. Stephen 12 Published OnlineFirst July 28, 2011.Cancer Discovery...

  6. Quantifying Offshore Wind Resources from Satellite Wind Maps

    E-Print Network [OSTI]

    Pryor, Sara C.

    Quantifying 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 site at Horns Rev is given based on satellite SAR observa- tions.The comparison of offshore satellite

  7. NOAA Satellite and Information Service The National Environmental Satellite, Data, and Information Service (NESDIS) is dedicated to providing

    E-Print Network [OSTI]

    satellites and other sources to promote, protect, and enhance the Nation's economy, security, environmentNOAA Satellite and Information Service Mission The National Environmental Satellite, Data the Nation's operational environmental satellites, · operates the NOAA National Data Centers, · provides data

  8. Network Chimera Network Chimera

    E-Print Network [OSTI]

    Network Chimera Network Chimera Objective Chimera aims to understand how the network properties enough with limited resources. The Chimera team is cross-disciplinary, and includes computer scientists Impact The original hypothesis of Chimera was that a physical network could be reduced to a graph

  9. Networks: Contribution to the Encyclopedia of Science, Technology, and Author: Anna Nagurney

    E-Print Network [OSTI]

    Nagurney, Anna

    /or video and today may involve telephones, computers, as well as satellites and microwaves. Energy networks, accessibility, and usage. The topic of networks and network management dates to ancient times (1736), which is credited with being the earliest paper on graph theory, where a graph in this context

  10. facets and dispatches a system mobile agent to carry them with it and extract the user agents at idle servers.

    E-Print Network [OSTI]

    Fukuda, Munehiro

    at idle servers. 6 Conclusions In this paper we have focused on small scale inter­cluster job coordination­ dination work and upgrade the features of remote clusters using mobile agents. We have implemented

  11. Power Minimization techniques for Networked Data Centers.

    SciTech Connect (OSTI)

    Low, Steven; Tang, Kevin

    2011-09-28T23:59:59.000Z

    Our objective is to develop a mathematical model to optimize energy consumption at multiple levels in networked data centers, and develop abstract algorithms to optimize not only individual servers, but also coordinate the energy consumption of clusters of servers within a data center and across geographically distributed data centers to minimize the overall energy cost and consumption of brown energy of an enterprise. In this project, we have formulated a variety of optimization models, some stochastic others deterministic, and have obtained a variety of qualitative results on the structural properties, robustness, and scalability of the optimal policies. We have also systematically derived from these models decentralized algorithms to optimize energy efficiency, analyzed their optimality and stability properties. Finally, we have conducted preliminary numerical simulations to illustrate the behavior of these algorithms. We draw the following conclusion. First, there is a substantial opportunity to minimize both the amount and the cost of electricity consumption in a network of datacenters, by exploiting the fact that traffic load, electricity cost, and availability of renewable generation fluctuate over time and across geographical locations. Judiciously matching these stochastic processes can optimize the tradeoff between brown energy consumption, electricity cost, and response time. Second, given the stochastic nature of these three processes, real-time dynamic feedback should form the core of any optimization strategy. The key is to develop decentralized algorithms that can be implemented at different parts of the network as simple, local algorithms that coordinate through asynchronous message passing.

  12. Application and Network-Cognizant Proxies - Final Report

    SciTech Connect (OSTI)

    Antonio Ortega; Daniel C. Lee

    2003-03-24T23:59:59.000Z

    OAK B264 Application and Network-Cognizant Proxies - Final Report. Current networks show increasing heterogeneity both in terms of their bandwidths/delays and the applications they are required to support. This is a trend that is likely to intensify in the future, as real-time services, such as video, become more widely available and networking access over wireless links becomes more widespread. For this reason they propose that application-specific proxies, intermediate network nodes that broker the interactions between server and client, will become an increasingly important network element. These proxies will allow adaptation to changes in network characteristics without requiring a direct intervention of either server or client. Moreover, it will be possible to locate these proxies strategically at those points where a mismatch occurs between subdomains (for example, a proxy could be placed so as to act as a bridge between a reliable network domain and an unreliable one). This design philosophy favors scalability in the sense that the basic network infrastructure can remain unchanged while new functionality can be added to proxies, as required by the applications. While proxies can perform numerous generic functions, such as caching or security, they concentrate here on media-specific, and in particular video-specific, tasks. The goal of this project was to demonstrate that application- and network-specific knowledge at a proxy can improve overall performance especially under changing network conditions. They summarize below the work performed to address these issues. Particular effort was spent in studying caching techniques and on video classification to enable DiffServ delivery. other work included analysis of traffic characteristics, optimized media scheduling, coding techniques based on multiple description coding, and use of proxies to reduce computation costs. This work covered much of what was originally proposed but with a necessarily reduced scope.

  13. 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.

    1991-08-01T23:59:59.000Z

    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.

  14. k-Zero Day Safety: A Network Security Metric for Measuring the Risk of Unknown Vulnerabilities

    E-Print Network [OSTI]

    Wang, Lingyu

    systems at nuclear power plants, implanted heart de brillators, and military satellites. One of the main. However, the scale and severity of security threats to computer networks have continued to grow at an ever

  15. http://www.cse.wustl.edu/~jain/cse567-06/ftp/net_perf_monitors/index.html 1 of 20 A Survey of Network Performance Monitoring

    E-Print Network [OSTI]

    Jain, Raj

    are likely to change vendors or providers. Consequently, network performance monitoring (NPM) must be done failures within a server, causing either erroneous output or none at all. NPM is a multi-faceted task platforms (NMPs). The remainder of this paper will address these aspects of NPM, as well as presenting

  16. Automated Sensor Networks to Advance Ocean Science

    E-Print Network [OSTI]

    satellite telecom- munications. A regional cabled observa- tory will "wire" a single region in the north- eastern Pacific Ocean with a high-speed optical and power grid. The coastal com- ponent will expand ocean- observing network in the Mid-Atlantic Bight waters (MAB, spanning offshore regions from

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

    E-Print Network [OSTI]

    Albert, J; Rhodes, J; Albert, Justin; Burgett, William; Rhodes, Jason

    2006-01-01T23:59:59.000Z

    We propose a tunable laser-based satellite-mounted spectrophotometric and absolute flux calibration system, to be utilized by ground- and space-based telescopes. As uncertainties on the photometry, due to imperfect knowledge of both telescope optics and the atmosphere, will in the near future begin to dominate the uncertainties on fundamental cosmological parameters such as Omega_Lambda and w in measurements from 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 to 0.1% and relative spectrophotometric calibration to better than 0.001% across the visible and near-infrared spectrum. As well as fundamental astrophysical applications, the system proposed here potentially...

  18. 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

    2006-05-19T23:59:59.000Z

    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.

  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. SWOT Satellite Mission: Combined State Parameter Estimation

    E-Print Network [OSTI]

    Washington at Seattle, University of

    river basins LISFLOOD-FP, a raster- based inundation model Based on a 1-D kinematic wave equation, 27 February 2008 #12;2 Outline Surface Water Ocean Topography (SWOT) satellite mission The state-parameter estimation problem Data assimilation experiments ­ Water depth ­ Discharge ­ Channel width ­ Roughness

  1. SEMI EMPIRICAL SATELLITE MODELS Richard Perez1

    E-Print Network [OSTI]

    Perez, Richard R.

    used for solar engineering applications. These satellites are equipped with several radiation sensors University of New York, ASRC, Albany, NY, USA 2 GeoModel Solar, Bratislava, Slovakia Abstract This chapter discusses basic principles of solar irradiance modeling based on the use of input data from geostationary

  2. ATS 351, Spring 2010 Satellite 50 points

    E-Print Network [OSTI]

    Rutledge, Steven

    sensor is a radar. Passive sensors do not emit any radiation, and only detect naturally occurring their own radiation, and measure the return signal that is sent back to them. A good example of an active radiation that is emitted. Most satellites are passive sensors. 3. (5 points). Label each of the following

  3. Satellite Infrared Soundings From NOAA Spacecraft

    E-Print Network [OSTI]

    NOAA Tec / Satellite Infrared Soundings From NOAA Spacecraft #12;U.S. DEPARTMENT OF COMMERCE Infrared Soundings From NOAA Spacecraft L. M. McMillin D. Q. Wark J. M. Siomkajlo P. G. Abel A. Werbowetzki. E. Bittner C. M. Hayden #12;UDC 551.507.362.2:551.508.2:551.501.7:535-1 Physics Infrared radiation

  4. Total Solar Irradiance Satellite Composites and their

    E-Print Network [OSTI]

    Scafetta, Nicola

    Chapter 12 Total Solar Irradiance Satellite Composites and their Phenomenological Effect on Climate. Phenomenological solar signature on climate 310 9. Conclusion 312 1. INTRODUCTION A contiguoustotal solar from each other, in particular about whether the TSI minimum during solar Cycles 22e23 (1995

  5. Building High-Quality Climate Data Records from Operational Satellites

    E-Print Network [OSTI]

    Kuligowski, Bob

    ;Implications to Construction of Satellite Climate Data Record · Well characterize the errors of satellite-A ATMS NOAA6-14 NOAA15-19 Suomi NPP MetOp-A/B FY

  6. Building technological capability within satellite programs in developing countries

    E-Print Network [OSTI]

    Wood, Danielle Renee

    2012-01-01T23:59:59.000Z

    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 ...

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

    E-Print Network [OSTI]

    Katz, Jacob G

    2013-01-01T23:59:59.000Z

    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 ...

  8. Server/Client model. Server , client server

    E-Print Network [OSTI]

    Triantafillou, Peter

    memory ID if OK -1 error «key» "IPC_PRIVATE", kernel non-negative integer identifier; shmctl() : int shmctl (int shmid, int cmd, struct shmid_ds *buf); «cmd» IPC_STAT, IPC_SET, IPC_RMID. . googl : ­ IPC_STAT fills the buf data structure ­ IPC_SET can change the uid

  9. Cheaters in the Steam Community Gaming Social Network

    E-Print Network [OSTI]

    Blackburn, Jeremy; Kourtellis, Nicolas; Zuo, Xiang; Long, Clayton; Ripeanu, Matei; Skvoretz, John; Iamnitchi, Adriana

    2011-01-01T23:59:59.000Z

    Online gaming is a multi-billion dollar industry that entertains a large, global population. One unfortunate phenomenon, however, poisons the competition and the fun: cheating. The costs of cheating span from industry-supported expenditures to detect and limit cheating, to victims' monetary losses due to cyber crime. This paper studies cheaters in the Steam Community, an online social network built on top of the world's dominant digital game delivery platform. We collected information about more than 12 million gamers connected in a global social network, of which more than 700 thousand have their profiles flagged as cheaters. We also collected in-game interaction data of over 10 thousand players from a popular multiplayer gaming server. We show that cheaters are well embedded in the social and interaction networks: their network position is largely undistinguishable from that of fair players. We observe that the cheating behavior appears to spread through a social mechanism: the presence and the number of ch...

  10. A model for improving ocean wind forecasts using satellite

    E-Print Network [OSTI]

    Malmberg, Anders

    Using the dynamical model from previous talk we now want to assimilate the satellite measurements Using the dynamical model from previous talk we now want to assimilate the satellite measurements now want to assimilate the satellite measurements into this model. We will discuss the measurement

  11. Satellite Eye for Galathea 3 Annual Report 2006

    E-Print Network [OSTI]

    Satellite Eye for Galathea 3 Annual Report 2006 Charlotte Bay Hasager, Peter Brøgger Sørensen, Leif Title: Satellite Eye for Galathea 3 Annual Report 2006 Department: Wind Energy Department Abstract (max. 2000 char.): ISSN 0106-2840 ISBN 978-87-550-3580-5 The Satellite Eye for Galathea 3 project

  12. Satellite Eye for Galathea 3 Annual Report 2007

    E-Print Network [OSTI]

    Satellite Eye for Galathea 3 Annual Report 2007 Charlotte Bay Hasager, Peter Brøgger Sørensen, Leif Nielsen, Roberto Saldo og René Møller Title: Satellite Eye for Galathea 3 Annual Report 2007 Department: Wind Energy Department Risø-R-1626(EN) March 2008 Abstract (max. 2000 char.): Satellite Eye

  13. Observing ocean heat content using satellite gravity and altimetry

    E-Print Network [OSTI]

    Jayne, Steven

    : ocean heat content, altimetry, satellite gravity, steric height, remote sensing Citation: Jayne, S. RObserving ocean heat content using satellite gravity and altimetry Steven R. Jayne1,2 and John M with satellite measurements of the Earth's time-varying gravity to give improved estimates of the ocean's heat

  14. OpenPolarServer (OPS) - An Open Source Spatial Data Infrastructure for the Cryosphere Community

    E-Print Network [OSTI]

    Purdon, Kyle Wayne

    2014-05-31T23:59:59.000Z

    Protocol (FTP) is one of the standard methods for transferring files over the internet from one computer to another. CReSIS implements a standard FTP server which exposes an organized directory of files to the web. This allows users to connect... section (gps, records, frames, data, and layerData) as well as the output file formats (CSV, KML, JPEG …) are served through the CReSIS FTP. Fig. 7 shows a standard season directory on the CReSIS FTP. The NSIDC data archive is a hub for the archival...

  15. An acquisition system based on a network of microvax's running the realtime DEC VAXELN operating system

    SciTech Connect (OSTI)

    D'Antone, I.; Mandrioli, G.; Matteuzzi, P.; Sanzani, G. (Bologna Univ. (Italy). Dipt. di Fisica); Bloise, C.; Grillo, A.F.; Marini, A.; Ronga, F. (INFN Laboratori Nazionali di Frascati, C.P.13, 00044 Frascati (IT)); Baldini, A. (Via Livornese, San Piero a Grado, 56100 Pisa (IT)); Mancarella, G.; Palamara, O.; Surdo, A. (Lecce Univ. (Italy). Ist. di Fisica)

    1989-10-01T23:59:59.000Z

    The authors describe an acquisition system based on a network (Ethernet/DECNET) of MicroVAX's running in the VAXELN environment. VAXELN is a Digital Equipment software product for the development of dedicated, real time systems for VAX processors. A central VAX running under the VAX/VMS operating system is used as file server and as an interface of the acquisition system with respect to the user's world.

  16. Nucleic Acids Research, 2007, Vol. 35, Web Server issue W357W362 doi:10.1093/nar/gkm231

    E-Print Network [OSTI]

    Weston, Ken

    ://pipe.scs.fsu.edu. To illustrate the utility of these web servers, cons-PPISP and DISPLAR predictions are used to construct of the web servers and illustrate their utility by a structural model, built from predictions of the web similar designs. The input in each case consists of data for a list of residues. In WESA, the list

  17. Satellites in Discs: Regulating the Accretion Luminosity

    E-Print Network [OSTI]

    Dave Syer; Cathie Clarke

    1995-05-04T23:59:59.000Z

    We demonstrate, using a simple analytic model, that the presence of a massive satellite can globally modify the structure and emission properties of an accretion disc to which it is tidally coupled. We show, using two levels of numerical approximation, that the analytic model gives reasonable results. The results are applicable to two astrophysical situations. In the case of an active galactic nucleus, we consider the case of a $\\sim 10^3\\Msun$ compact companion to the central black-hole and show that it could modulate the emitted spectrum on a timescale of $\\sim10^5$ years. In the case of a T Tauri accretion disc, a satellite such as a sub-dwarf or giant planet could modify the disc spectral energy distribution over a substantial fraction of the T Tauri star lifetime.

  18. T-668: Vulnerability in a BlackBerry Enterprise Server component could allow information disclosure and partial denial of service

    Broader source: Energy.gov [DOE]

    This advisory describes a security issue in the BlackBerry Administration API component. Successful exploitation of the vulnerability could result in information disclosure and partial denial of service (DoS). The BlackBerry Administration API is a BlackBerry Enterprise Server component that is installed on the server that hosts the BlackBerry Administration Service. The BlackBerry Administration API contains multiple web services that receive API requests from client applications. The BlackBerry Administration API then translates requests into a format that the BlackBerry Administration Service can process.

  19. Energy-Aware Load Balancing in Content Delivery Networks

    E-Print Network [OSTI]

    Mathew, Vimal; Shenoy, Prashant

    2011-01-01T23:59:59.000Z

    Internet-scale distributed systems such as content delivery networks (CDNs) operate hundreds of thousands of servers deployed in thousands of data center locations around the globe. Since the energy costs of operating such a large IT infrastructure are a significant fraction of the total operating costs, we argue for redesigning CDNs to incorporate energy optimizations as a first-order principle. We propose techniques to turn off CDN servers during periods of low load while seeking to balance three key design goals: maximize energy reduction, minimize the impact on client-perceived service availability (SLAs), and limit the frequency of on-off server transitions to reduce wear-and-tear and its impact on hardware reliability. We propose an optimal offline algorithm and an online algorithm to extract energy savings both at the level of local load balancing within a data center and global load balancing across data centers. We evaluate our algorithms using real production workload traces from a large commercial ...

  20. SNL evaluation of Gigabit Passive Optical Networks (GPON).

    SciTech Connect (OSTI)

    Heckart, David G.; Roybal, Glen B.; Walker, Betty R.; Pratt, Thomas Joseph; Gossage, Steven Allen; Trujillo, Sandra M.; Fischer, Bob; Brenkosh, Joseph Peter; Rudolfo, Gerald F.; Dirks, David H.; Schutt, James Alan

    2009-08-01T23:59:59.000Z

    Gigabit Passive Optical Networks (GPON) is a networking technology which offers the potential to provide significant cost savings to Sandia National Laboratories in the area of network operations. However, a large scale GPON deployment requires a significant investment in equipment and infrastructure. Before a large scale GPON system was acquired and built, a small GPON system manufactured by Motorola was acquired and tested. The testing performed was to determine the suitability of GPON for use at SNL. This report documents that testing. This report presents test results of GPON system consisting of Motorola and Juniper equipment. The GPON system was tested in areas of data throughput, video conferencing, VOIP, security, and operations and management. The GPON system performed well in almost all areas. GPON will not meet the needs of the low percentage of users requiring a true 1-10 Gbps network connection. GPON will also most likely not meet the need of some servers requiring dedicated throughput of 1-10 Gbps. Because of that, there will be some legacy network connections that must remain. If these legacy network connections can not be reduced to a bare minimum and possibly consolidated to a few locations, any cost savings gained by switching to GPON will be negated by maintaining two networks. A contract has been recently awarded for new GPON equipment with larger buffers. This equipment should improve performance and further reduce the need for legacy network connections. Because GPON has fewer components than a typical hierarchical network, it should be easier to manage. For the system tested, the management was performed by using the AXSVison client. Access to the client must be tightly controlled, because if client/server communications are compromised, security will be an issue. As with any network, the reliability of individual components will determine overall system reliability. There were no failures with the routers, OLT, or Sun Workstation Management platform. There were however four ONTs that failed. Because of the small sample size of 64, and the fact that some of the ONTs were used units, no conclusions can be made. However, ONT reliability is an area of concern. Access to the fiber plant that GPON requires must be tightly controlled and all changes documented. The undocumented changes that were performed in the GPON test lab demonstrated the need for tight control and documentation. In summary, GPON should be able to meet the needs of most network users at Sandia National Laboratories. Because it supports voice, video, and data, it positions Sandia National Laboratories to deploy these services to the desktop. For the majority of corporate network users at Sandia National Laboratories GPON should be a suitable replacement for the legacy network.

  1. activity monitoring sensor: Topics by E-print Network

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

    processing. Individual sensors monitor specific physiological signals (such as EEG, ECG, GSR, etc.) and communicate with each other and the personal server. Personal server...

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

    SciTech Connect (OSTI)

    Lanzisera, Steven; Nordman, Bruce; Brown, Richard E.

    2010-06-09T23:59:59.000Z

    Network connectivity has become nearly ubiquitous, and the energy use of the equipment required for this connectivity is growing. Network equipment consists of devices that primarily switch and route Internet Protocol (IP) packets from a source to a destination, and this category specifically excludes edge devices like PCs, servers and other sources and sinks of IP traffic. This paper presents the results of a study of network equipment energy use and includes case studies of networks in a campus, a medium commercial building, and a typical home. The total energy use of network equipment is the product of the stock of equipment in use, the power of each device, and their usage patterns. This information was gathered from market research reports, broadband market penetration studies, field metering, and interviews with network administrators and service providers. We estimate that network equipment in the USA used 18 TWh, or about 1percent of building electricity, in 2008 and that consumption is expected to grow at roughly 6percent per year to 23 TWh in 2012; world usage in 2008 was 51 TWh. This study shows that office building network switches and residential equipment are the two largest categories of energy use consuming 40percent and 30percent of the total respectively. We estimate potential energy savings for different scenarios using forecasts of equipment stock and energy use, and savings estimates range from 20percent to 50percent based on full market penetration of efficient technologies.

  3. Managing Energy and Server Resources in Hosting Centers Jeffrey S. Chase, Darrell C. Anderson, Prachi N. Thakar, Amin M. Vahdat

    E-Print Network [OSTI]

    Sirer, Emin Gun

    of delivered performance. The system continuously moni- tors load and plans resource allotments by estimating bandwidth) to insulate its customers from demand surges and capital costs for excess capacity. HostingManaging Energy and Server Resources in Hosting Centers Jeffrey S. Chase, Darrell C. Anderson

  4. Using Server Pages to Unify Clones in Web Applications: A Trade-off Damith C. Rajapakse and Stan Jarzabek

    E-Print Network [OSTI]

    Jarzabek, Stan

    Project Collaboration Environment (PCE). We built PCE based on requirements from one of our industry projects [12]. We selected the Server page technique of PHP to implement PCE. We incrementally applied design patterns and PHP features to unify clones in PCE, progressively replacing clones with generic

  5. Directory Home Directory Liaison List Server Help A-Z Index IFAS Main Pa Unit Name: Ft. Lauderdale -REC

    E-Print Network [OSTI]

    Florida, University of

    Directory Home Directory Liaison List Server Help A-Z Index IFAS Main Pa Unit Name: Ft. Lauderdale, and Page 1 of 2Employee and Unit Directory - IFAS - Institute of Food and Agricultural Sciences, University of Flor... 8/13/2013http://directory.ifas.ufl.edu/Dir/searchdir?pageID=2&uid=85 #12;Tampa) 1. Take US-27

  6. Argon: performance insulation for shared storage servers Matthew Wachs, Michael Abd-El-Malek, Eno Thereska, Gregory R. Ganger

    E-Print Network [OSTI]

    Argon: performance insulation for shared storage servers Matthew Wachs, Michael Abd-El-Malek, Eno) of the throughput it would get alone. Argon uses automatically- configured prefetch/write-back sizes to insulate services, based on their observed access patterns, to insulate the hit rate each achieves from the access

  7. Mobile Codes Localization in Ad hoc Networks: a Comparative Study of Centralized and Distributed Approaches

    E-Print Network [OSTI]

    Zafoune, Youcef; kanawati, Rushed; 10.5121/ijcnc.2010.2213

    2010-01-01T23:59:59.000Z

    This paper presents a new approach in the management of mobile ad hoc networks. Our alternative, based on mobile agent technology, allows the design of mobile centralized server in ad hoc network, where it is not obvious to think about a centralized management, due to the absence of any administration or fixed infrastructure in these networks. The aim of this centralized approach is to provide permanent availability of services in ad hoc networks which are characterized by a distributed management. In order to evaluate the performance of the proposed approach, we apply it to solve the problem of mobile code localization in ad hoc networks. A comparative study, based upon a simulation, of centralized and distributed localization protocols in terms of messages number exchanged and response time shows that the centralized approach in a distributed form is more interesting than a totally centralized approach.

  8. Satellite stories featured in Lab lecture series

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted for USMaterialstheterahertz sourcesSatellite stories featured

  9. Cycle time variability for a network under two queueing disciplines

    E-Print Network [OSTI]

    Vasquez Pariente, Marta Irene

    1996-01-01T23:59:59.000Z

    the variance of those quantities. Conway (1965a and 1965b) and Rochette and Sadowski (1976) studied the FISFO dispatching rule. Conway studied a job shop that consisted of 9 machines and 8700 jobs per run in both studies. In the first article cited... in this thesis is a network comprised of three single-server queues. Two dispatching rules were implemented. The measures of performance were the mean and the variance of the cycle time. The following factors were used to analyze the performance of the FISFO...

  10. Recovery Act: SeaMicro Volume Server Power Reduction Research Development

    SciTech Connect (OSTI)

    Gary Lauterbach

    2012-03-22T23:59:59.000Z

    Cloud data centers are projected to be the fastest growing segment of the server market through 2015, according to IDC. Increasingly people and businesses rely on the Cloud to deliver digital content quickly and efficiently. Recovery Act funding from the Department of Energy has helped SeaMicro's technologies enhance the total cost of operation, performance and energy efficiency in large data center and Cloud environments. SeaMicro's innovative supercomputer fabric connects thousands of processor cores, memory, storage and input/output traffic. The company's fabric supports multiple processor instruction sets. Current systems featuring SeaMicro technology typically use one quarter the power and take one sixth the space of traditional servers with the same compute performance, yet deliver up to 12 times the bandwidth per core. Mozilla and eHarmony are two customers successfully using SeaMicro's technology. Numerous non-public customers have been successfully using the SeaMicro product in test and production facilities. As a result of the Recovery Act funding from the U.S. Department of Energy, more than 50 direct jobs were created at SeaMicro. To date, they primarily have been high-value, engineering jobs. Hardware, software and manufacturing engineering positions have been created, as well as sales and sales engineering. The positions have allowed SeaMicro to significantly accelerate engineering development and accelerate commercialization. As a result, commercialization and delivery to market are months ahead of initial schedule. Additional jobs were indirectly created through the development of the SeaMicro product. Through many years of research and hard work prior to receipt of public funding, SeaMicro was awarded 2 patents for its work. SeaMicro's product led the way for industry leaders to reconsider the market for low power servers and create new product lines. With valuable support of the U.S. Department of Energy and through SeaMicro's product, the market has been reshaped by the company's unique approach and ground breaking technology.

  11. Satellite Data Assimilation forSatellite Data Assimilation for Naval Undersea CapabilityNaval Undersea Capability

    E-Print Network [OSTI]

    Chu, Peter C.

    of satellite altimeters necessary to ensure maximum weapon effectiveness · To determine the point at which additional altimeter input no longer increases weapon effectiveness #12;Modular Ocean Data Assimilation for quantifying the effect on weapon presets #12;Environmental Fields · 2 MODAS data fields ­ one with assimilated

  12. Development of a simulation model for analysis of MPOA and LANE networks

    E-Print Network [OSTI]

    Kausar, Shafia

    1999-01-01T23:59:59.000Z

    10 LAN Emulation User to Network Interface (LUNI) [Ij LANE Components and Connections 12 MPOA Components MPC Interface 17 18 Multi Protocol Server Components 19 MPOA Target Resolution for Shortcut Setup 21 MPOA Data Flows . 23 10 Flow... Analysis at the Ingress MPC 24 MPOA Network 25 12 Intra-ELAN, Intra-Subnet Communication Intra-ELAN, Inter-Subnet Communication 26 26 14 Intra-ELAN, Inter-Subnet Communication With MPOA 27 15 16 Inter-ELAN, Inter-Subnet Communication Inter...

  13. Modeling Of Surface Deformation From Satellite Radar Interferometry...

    Open Energy Info (EERE)

    interferometric synthetic aperture radar) analysis of two-year Radarsat satellite data covering the period May 2006 - March 2008. SAR scenes from two orbit geometries are...

  14. The system architecting process for a solar power satellite concept.

    E-Print Network [OSTI]

    Bidwell, Joseph Grady

    2006-01-01T23:59:59.000Z

    ??This thesis discusses the system architecting process for a Solar Power Satellite (SPS) concept.The heuristic approach allows a spectrum of concepts to be narrowed to… (more)

  15. Orbits design for Leo space based solar power satellite system.

    E-Print Network [OSTI]

    Addanki, Neelima Krishna Murthy

    2011-01-01T23:59:59.000Z

    ?? Space Based Solar Power satellites use solar arrays to generate clean, green, and renewable electricity in space and transmit it to earth via microwave,… (more)

  16. Geographic Information Systems-Transportation ISTEA management systems server-net prototype pooled fund study: Phase B summary

    SciTech Connect (OSTI)

    Espinoza, J. Jr.; Dean, C.D.; Armstrong, H.M. [and others

    1997-06-01T23:59:59.000Z

    The Geographic Information System-Transportation (GIS-T) ISTEA Management Systems Server Net Prototype Pooled Fund Study represents the first national cooperative effort in the transportation industry to address the management and monitoring systems as well as the statewide and metropolitan transportation planning requirements of the Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA). The Study was initiated in November 1993 through the Alliance for Transportation Research and under the leadership of the New Mexico State Highway and Transportation Department. Sandia National Laboratories, an Alliance partner, and Geographic Paradigm Computing. Inc. provided technical leadership for the project. In 1992, the Alliance for Transportation Research, the New Mexico State Highway and Transportation Department, Sandia National Laboratories, and Geographic Paradigm Computing, Inc., proposed a comprehensive research agenda for GIS-T. That program outlined a national effort to synthesize new transportation policy initiatives (e.g., management systems and Intelligent Transportation Systems) with the GIS-T server net ideas contained in the NCHRP project {open_quotes}Adaptation of GIS to Transportation{close_quotes}. After much consultation with state, federal, and private interests, a project proposal based on this agenda was prepared and resulted in this Study. The general objective of the Study was to develop GIS-T server net prototypes supporting the ISTEA requirements for transportation planning and management and monitoring systems. This objective can be further qualified to: (1) Create integrated information system architectures and design requirements encompassing transportation planning activities and data. (2) Encourage the development of functional GIS-T server net prototypes. (3) Demonstrate multiple information systems implemented in a server net environment.

  17. Sundman Stability of Natural Planet Satellites

    E-Print Network [OSTI]

    Lukyanov, L G

    2012-01-01T23:59:59.000Z

    The stability of the motion of the planet satellites is considered in the model of the general three-body problem (Sun-planet-satellite). "Sundman surfaces" are constructed, by means of which the concept "Sundman stability" is formulated. The comparison of the Sundman stability with the results of Golubev's c2h method and with the Hill's classical stability in the restricted three-body problem is performed. The constructed Sundman stability regions in the plane of the parameters "energy - moment of momentum" coincide with the analogous regions obtained by Golubev's method, with the value (c2h)cr. The construction of the Sundman surfaces in the three-dimensional space of the specially selected coordinates xyR is carried out by means of the exact Sundman inequality in the general three-body problem. The determination of the singular points of surfaces, the regions of the possible motion and Sundman stability analysis are implemented. It is shown that the singular points of the Sundman surfaces in the coordinate...

  18. Fast object detection for use onboard satellites

    E-Print Network [OSTI]

    Martin Bange; Stefan Jordan; Michael Biermann; Thomas Kaempke; R alf-Dieter Scholz

    2003-01-30T23:59:59.000Z

    We propose an object detection algorithm which is efficient and fast enough to be used in (almost) real time with the limited computer capacities onboard satellites. For stars below the saturation limit of the CCD detectors it is based on a four neighbourhood local maximum criterion in order to find the centre of a stellar image. For saturated stars it is based on the assumption that the image is increasing monotonically towards the centre in the unsaturated part of the image. The algorithm also calculates approximate stellar magnitudes and efficiently rejects most of the cosmics which would otherwise lead to a large number of false detections. The quality of the algorithm was evaluated with the help of a large set of simulated data for the DIVA satellite mission; different assumptions were made for the noise level, and the presence of cosmics or for a variable sky background. We could show that our algorithm fulfills the requirements for DIVA; only in the case of simulated images which included the bright galaxy M31 some fainter stars could not be detected in the galaxy's vicinity. Since stellar images contain large areas without any stars, we propose an additional block-skipping algorithm which can be coded on special-purpose hardware.

  19. Sponsored by: Texas Soil Observation Network (TxSON)

    E-Print Network [OSTI]

    Yang, Zong-Liang

    Sponsored by: Texas Soil Observation Network (TxSON) A Program for Monitoring SOIL MOISTURE Across the State of Texas Refined soil moisture satellite data products for operational use and improved to meet water, wind, and energy demands Real-time emergency response data for natural disasters

  20. Optimal Energy Allocation and Admission Control for Communications Satellites

    E-Print Network [OSTI]

    Modiano, Eytan

    Initiative. input and output of energy relatively static, such a satellite may not require a sophisticated1 Optimal Energy Allocation and Admission Control for Communications Satellites Alvin Fu, Eytan Modiano, and John Tsitsiklis Abstract--We address the issue of optimal energy alloca- tion and admission

  1. 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

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

    E-Print Network [OSTI]

    Risø-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 resources, e.g. in future planning of offshore wind farms. The report describes the validation analysis

  3. INTERDISCIPLINARY SCIENCE AND APPLICATIONS USING SATELLITE RADAR ALTIMETRY

    E-Print Network [OSTI]

    latitude coverage Earth Satellite Altimeters Altimeter measures geocentric sea level and ice sheet instrument has been developed at JPL using the principle of radar interferometry · The new measurementINTERDISCIPLINARY SCIENCE AND APPLICATIONS USING SATELLITE RADAR ALTIMETRY C.K. SHUM EE Wave

  4. Lake level variations from satellite radar altimetry with

    E-Print Network [OSTI]

    Stuttgart, Universität

    Lake level variations from satellite radar altimetry with retracking of multi-leading edge Shirzad level measurements Increase the number of reliable observations particularly in the shoreline cm Descending tracks Time [year] Waterlevel[m]Lake level variations from satellite radar altimetry

  5. Short term forecasting of solar radiation based on satellite data

    E-Print Network [OSTI]

    Heinemann, Detlev

    Short term forecasting of solar radiation based on satellite data Elke Lorenz, Annette Hammer term time range of 30 minutes to 6 hours. As far as short term horizons are concerned, satellite data index images according to the Heliosat method, a semi-empirical methode to derive radiation from

  6. From the Atlanta Workshop -Use Satellite Data for Model Evaluation

    E-Print Network [OSTI]

    Jacob, Daniel J.

    Assimilation ­ dries surface Control - Model too cool due to moisture Plan to revisit August 2006 Texas evaluations 1. Clouds ­ Clouds play a major role in photolysis rates , temperature and wet chemistry. Models temperature #12;model (control) vs. satellite retrieval Satellite retrievals (K) model (sat. assim.) vs

  7. The Nuclear Detonation Detection System on the GPS satellites

    SciTech Connect (OSTI)

    Higbie, P.R. [Los Alamos National Lab., NM (United States); Blocker, N.K. [Sandia National Labs., Albuquerque, NM (United States)

    1993-07-27T23:59:59.000Z

    This article begins with a historical perspective of satellite usage in monitoring nuclear detonations. Current capabilities of the 24 GPS satellites in detecting the light, gamma rays, x-rays and neutrons from a nuclear explosion are described. In particular, an optical radiometer developed at Sandia National Laboratories is characterized. Operational information and calibration procedures are emphasized.

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

    E-Print Network [OSTI]

    wind power potential. Scatterometer wind data are observed ~ twice per day, whereas SAR onlyRisø-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

  9. Asymptotic behavior of an elastic satellite with internal friction

    E-Print Network [OSTI]

    Emanuele Haus; Dario Bambusi

    2012-12-04T23:59:59.000Z

    We study the dynamics of an elastic body whose shape and position evolve due to the gravitational forces exerted by a pointlike planet. The main result is that, if all the deformations of the satellite dissipate some energy, then under a suitable nondegeneracy condition there are only three possible outcomes for the dynamics: (i) the orbit of the satellite is unbounded, (ii) the satellite falls on the planet, (iii) the satellite is captured in synchronous resonance i.e. its orbit is asymptotic to a motion in which the barycenter moves on a circular orbit, and the satellite moves rigidly, always showing the same face to the planet. The result is obtained by making use of LaSalle's invariance principle and by a careful kinematic analysis showing that energy stops dissipating only on synchronous orbits. We also use in quite an extensive way the fact that conservative elastodynamics is a Hamiltonian system invariant under the action of the rotation group.

  10. The World Wide Web is giving rise to a new type of distributed information system, one with an Internet (or intranet) communication platform, a broader client/server

    E-Print Network [OSTI]

    Pagani, Elena

    with an Internet (or intranet) communication platform, a broader client/server architecture, the entire population issues regarding data access pro- tection on the Web [4]. The peculiar characteristics of this envir

  11. Satellite observations of ozone and nitrogen dioxide: from retrievals to emission estimates

    E-Print Network [OSTI]

    Haak, Hein

    Satellite observations of ozone and nitrogen dioxide: from retrievals to emission estimates #12 Satellite observations of ozone and nitrogen dioxide: from retrievals to emission es- timates / by Bas Subject headings: satellite retrieval / nitrogen dioxide / ozone / air pollution / emis- sion estimates

  12. Satellite Multiangle Cumulus Geometry Retrieval: Case Study

    SciTech Connect (OSTI)

    Kassianov, Evgueni I.; Ackerman, Thomas P.; Marchand, Roger T.; Ovtchinnikov, Mikhail

    2003-02-08T23:59:59.000Z

    Most satellite-based analyses have been conducted using near nadir-viewing sensors. The Multi-angle Imaging SpectroRadiometer (MISR), recently launched on the National Aeronautics and Space Administration (NASA) Terra platform, provides high-resolution measurements of reflectance at nine different viewing angles. In this study, we examine the possible retrieval of detailed cumulus geometry using the new and unique MISR datasets. We suggested one approach and apply it to an early MISR dataset of small marine cumulus clouds. This paper also presents validation analysis of this technique with both independent ground-based radar measurements and a model-output inverse problem. Collocated and coincident MISR data and ground-based observations at the Atmospheric Radiation Measurement (ARM) Tropical Western Pacific (TWP) site form the basis of this validation. Future work will attempt to test the suggested approach with additional MISR scenes.

  13. 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

  14. HydraNet-FT: network support for dependable servors

    E-Print Network [OSTI]

    Shenoy, Gurudatt

    1999-01-01T23:59:59.000Z

    Net-FT infrastructure consists of two components: host servers and redirecting. Host servers are hosts that are specially equipped to act as servers for replicated and fault-tolerant services. The location of the host servers is known to the redirecting, specially...

  15. A mAnuAl for CAsCAde server Content mAnAgement system (Cms)

    E-Print Network [OSTI]

    Fraden, Seth

    A mAnuAl for CAsCAde server Content mAnAgement system (Cms) CMS USer GUide #12;#12;A mAnuAl for CAs to Create an email Address Link 74 how to Upload Multiple Files at Once CHapTeR 9 77 BeST PrACTICeS 78 the Mozilla Firefox browser and navigate to webedit.brandeis.edu. Best practice: We recommend using Mozilla

  16. The Distribution of Satellite Galaxies: The Great Pancake

    E-Print Network [OSTI]

    Noam I Libeskind; Carlos S Frenk; Shaun Cole; John C Helly; Adrian Jenkins; Julio F Navarro; Chris Power

    2005-03-18T23:59:59.000Z

    The 11 known satellite galaxies within 250 kpc of the Milky Way lie close to a great circle on the sky. We use high resolution N-body simulations of galactic dark matter halos to test if this remarkable property can be understood within the context of the cold dark matter cosmology. We construct halo merger trees from the simulations and use a semianalytic model to follow the formation of satellite galaxies. We find that in all 6 of our simulations, the 11 brightest satellites are indeed distributed along thin, disk-like structures analogous to that traced by the Milky Way's satellites. This is in sharp contrast to the overall distributions of dark matter in the halo and of subhalos within it which, although triaxial, are not highly aspherical. We find that the spatial distribution of satellites is significantly different from that of the most massive subhalos but is similar to that of the subset of subhalos that had the most massive progenitors at earlier times. The elongated disk-like structure delineated by the satellites has its long axis aligned with the major axis of the dark matter halo. We interpret our results as reflecting the preferential infall of satellites along the spines of a few filaments of the cosmic web.

  17. Io hot spots - infrared photometry of satellite occultations

    SciTech Connect (OSTI)

    Goguen, J.D.; Matson, D.L.; Sinton, W.M.; Howell, R.R.; Dyck, H.M.

    1988-12-01T23:59:59.000Z

    Io's active hot spots, which are presently mapped on the basis of IR photometry of this moon's occultation by other Gallilean satellites, are obtained with greatest spatial resolution near the sub-earth point. A model is developed for the occultation lightcurves, and its fitting to the data defines the apparent path of the occulting satellite relative to Io; the mean error in apparent relative position of occulting satellites is of the order of 178 km. A heretofore unknown, 20-km diameter hot spot is noted on Io's leading hemisphere. 31 references.

  18. SONoMA: A Service Oriented Network Measurement Architecture

    E-Print Network [OSTI]

    Hullár, Béla; Stéger, József; Csabai, István; Vattay, Gábor

    2010-01-01T23:59:59.000Z

    To characterize the structure, dynamics and operational state of the Internet it requires distributed measurements. Although in the last decades several systems capable to do this have been created, the easy access of these infrastructures and orchestration of complex measurements is not solved. We propose a system architecture that combines the flexibility of mature network measurement infrastructures such as PlanetLab or ETOMIC with the general accessibility and popularity of public services like Web based bandwidth measurement or traceroute servers. To realize these requirements we developed a multi-layer architecture based on Web Services and the basic principles of SOA, which is a very popular paradigm in distributed business application development. Our approach opens the door to perform complex network measurements, handles heterogeneous measurement devices, automatically stores the results in a public database and protects against malicious users as well. To demonstrate our concept we developed a publ...

  19. Time series modeling and large scale global solar radiation forecasting from geostationary satellites data

    E-Print Network [OSTI]

    Voyant, Cyril; Muselli, Marc; Paoli, Christophe; Nivet, Marie Laure

    2014-01-01T23:59:59.000Z

    When a territory is poorly instrumented, geostationary satellites data can be useful to predict global solar radiation. In this paper, we use geostationary satellites data to generate 2-D time series of solar radiation for the next hour. The results presented in this paper relate to a particular territory, the Corsica Island, but as data used are available for the entire surface of the globe, our method can be easily exploited to another place. Indeed 2-D hourly time series are extracted from the HelioClim-3 surface solar irradiation database treated by the Heliosat-2 model. Each point of the map have been used as training data and inputs of artificial neural networks (ANN) and as inputs for two persistence models (scaled or not). Comparisons between these models and clear sky estimations were proceeded to evaluate the performances. We found a normalized root mean square error (nRMSE) close to 16.5% for the two best predictors (scaled persistence and ANN) equivalent to 35-45% related to ground measurements. F...

  20. Equatorial hydrology studies by satellite telemetry

    SciTech Connect (OSTI)

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

    1980-12-30T23:59:59.000Z

    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.

  1. Upgrading LDM Server and Archive Systems to support Atmospheric Sciences at Texas A&M University

    E-Print Network [OSTI]

    and exceptional expertise in communications technology, networking and cyber security on behalf of Texas, as well. In addition, the Academy instituted an Internet Data Distribution (IDD) framework using Unidata

  2. Risk management of student-run small satellite programs

    E-Print Network [OSTI]

    Deems, Elizabeth (Elizabeth Carolina)

    2007-01-01T23:59:59.000Z

    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 ...

  3. Gamma-ray burst data from DMSP satellites

    SciTech Connect (OSTI)

    Terrell, J.; Klebesadel, R.W.; Lee, P. (Los Alamos National Lab., NM (United States)); Griffee, J.W. (Sandia National Labs., Albuquerque, NM (United States))

    1991-01-01T23:59:59.000Z

    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.

  4. Gamma-ray burst data from DMSP satellites

    SciTech Connect (OSTI)

    Terrell, J.; Klebesadel, R.W.; Lee, P. [Los Alamos National Lab., NM (United States); Griffee, J.W. [Sandia National Labs., Albuquerque, NM (United States)

    1991-12-31T23:59:59.000Z

    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.

  5. Remote sensing of terrestrial tropospheric aerosols from aircraft and satellites

    E-Print Network [OSTI]

    Remote sensing of terrestrial tropospheric aerosols from aircraft and satellites M I Mishchenko1 instruments suitable for aerosol remote sensing and give examples of aerosol retrievals obtained forcing directly by absorbing and reflecting sunlight, thereby cooling or heating the atmosphere

  6. 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)

    2014-09-15T23:59:59.000Z

    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.

  7. Search for Dark Matter Satellites Using the FERMI-LAT

    SciTech Connect (OSTI)

    Ackermann, M.; /DESY; Albert, A.; /Ohio State U.; Baldini, L.; /INFN, Pisa; Ballet, J.; /DAPNIA, Saclay; Barbiellini, G.; /INFN, Trieste /Trieste U.; Bastieri, D.; /INFN, Padua /Padua U.; Bechtol, K.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Bellazzini, R.; /INFN, Pisa; Blandford, R.D.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Bloom, E.D.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /SLAC; Bonamente, E.; /INFN, Perugia /Perugia U.; Borgland, A.W.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Bottacini, E.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Brandt, T.J.; /IRAP, Toulouse /Toulouse III U.; Bregeon, J.; /INFN, Pisa; Brigida, M.; /Bari U. /INFN, Bari; Bruel, P.; /Ecole Polytechnique; Buehler, R.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Burnett, T.H.; /Washington U., Seattle; Caliandro, G.A.; /ICE, Bellaterra; Cameron, R.A.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /IASF, Milan /IASF, Milan /DAPNIA, Saclay /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /ASDC, Frascati /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Montpellier U. /Stockholm U. /Stockholm U., OKC /ASDC, Frascati /Bari U. /INFN, Bari /Naval Research Lab, Wash., D.C. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Montpellier U. /Bari U. /INFN, Bari /Ecole Polytechnique /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Hiroshima U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Bari U. /INFN, Bari /INFN, Bari /INFN, Perugia /Perugia U. /Bari U. /INFN, Bari /Bari U. /INFN, Bari /Bologna Observ. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; /more authors..

    2012-08-16T23:59:59.000Z

    Numerical simulations based on the {Lambda}CDM model of cosmology predict a large number of as yet unobserved Galactic dark matter satellites. We report the results of a Large Area Telescope (LAT) search for these satellites via the {gamma}-ray emission expected from the annihilation of weakly interacting massive particle (WIMP) dark matter. Some dark matter satellites are expected to have hard {gamma}-ray spectra, finite angular extents, and a lack of counterparts at other wavelengths. We sought to identify LAT sources with these characteristics, focusing on {gamma}-ray spectra consistent with WIMP annihilation through the b{bar b} channel. We found no viable dark matter satellite candidates using one year of data, and we present a framework for interpreting this result in the context of numerical simulations to constrain the velocity-averaged annihilation cross section for a conventional 100 GeV WIMP annihilating through the b{bar b} channel.

  8. Ion Micro-Propulsion and Cost Modeling for Satellite Clusters

    E-Print Network [OSTI]

    the primary instruments were distributed among three smaller satellites. This increased reliability of this thesis while I recovered from tendonitis in my wrists (too many hours slaving away in the lab!). Her help

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

    E-Print Network [OSTI]

    Wood, Danielle Renee

    2007-01-01T23:59:59.000Z

    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 ...

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

    E-Print Network [OSTI]

    Carle, William Everett

    1979-01-01T23:59:59.000Z

    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...

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

    E-Print Network [OSTI]

    Mabrey, Wayne Edward

    1970-01-01T23:59:59.000Z

    perspective: (1) By simulating the explosion of a satellite we mean that: given the knowledge of' the number of pieces and the force vector of each piece, we will simulate the resulting trajectories. (2) The simulation of a satellite trajectory... classical elements of each debris piece as a function of: (1) the trajectory of the center of mass of *he explosion debris and (2) the explosive forces. Computer program modules are developed to create an explosion and calculate the elements of each...

  12. E-Print Network 3.0 - abscesses apache iii Sample Search Results

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

    of the use of simplified resource material for the apache server using the HTTP... . Methodology Material . The server: As a server we used a PC dell optiplex GX 110 with a...

  13. 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)

    2013-08-20T23:59:59.000Z

    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}.

  14. Cognitive Radio Networks as Sensor Networks

    E-Print Network [OSTI]

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

    2007-01-01T23:59:59.000Z

    is used, assuming the cognitive radios know their ownfor Embedded Networked Sensing Cognitive Radio Networks AsJ. Pottie Introduction: Cognitive Radio (CR) Networks The

  15. Augmenting Satellite Precipitation Estimation with Lightning Information

    SciTech Connect (OSTI)

    Mahrooghy, Majid [Mississippi State University (MSU); Anantharaj, Valentine G [ORNL; Younan, Nicolas H. [Mississippi State University (MSU); Petersen, Walter A. [NASA Marshall Space Flight Center, Huntsville, AL; Hsu, Kuo-Lin [University of California, Irvine; Behrangi, Ali [Jet Propulsion Laboratory, Pasadena, CA; Aanstoos, James [Mississippi State University (MSU)

    2013-01-01T23:59:59.000Z

    We have used lightning information to augment the Precipitation Estimation from Remotely Sensed Imagery using an Artificial Neural Network - Cloud Classification System (PERSIANN-CCS). Co-located lightning data are used to segregate cloud patches, segmented from GOES-12 infrared data, into either electrified (EL) or non-electrified (NEL) patches. A set of features is extracted separately for the EL and NEL cloud patches. The features for the EL cloud patches include new features based on the lightning information. The cloud patches are classified and clustered using self-organizing maps (SOM). Then brightness temperature and rain rate (T-R) relationships are derived for the different clusters. Rain rates are estimated for the cloud patches based on their representative T-R relationship. The Equitable Threat Score (ETS) for daily precipitation estimates is improved by almost 12% for the winter season. In the summer, no significant improvements in ETS are noted.

  16. E-Print Network 3.0 - architecture styles components Sample Search...

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

    Cincia da Computao Summary: and server style The client-server style denes a service-oriented architecture where components can only... -based join point models An architectural...

  17. E-Print Network 3.0 - apache ii prediction Sample Search Results

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

    Safe Mechanism for Dynamically Removing Access Control Rules... states. With the apache web server, we observed that the server response time ... Source: Kourai, Kenichi -...

  18. E-Print Network 3.0 - apache ii index Sample Search Results

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

    Computer Technologies and Information Sciences 3 Performance Monitoring Apache Web Server Summary: 1 Performance Monitoring Of The Apache Web Server By Radha Subrahmanyan...

  19. E-Print Network 3.0 - apache utility authority Sample Search...

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

    and Ecology ; Multidisciplinary Databases and Resources 2 Performance Monitoring Apache Web Server Summary: 1 Performance Monitoring Of The Apache Web Server By Radha Subrahmanyan...

  20. E-Print Network 3.0 - artificial symbiotic community Sample Search...

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

    Green Grids: A Biologically-Inspired Adaptive Architecture for Power Efficient Server Farms Summary: , called SymbioticSphere, which allows server farms to autonomously adapt to...

  1. Workshop on Satellites for Solar Energy Resource Information -Washington, DC, April 10-11, 1996 POTENTIALS OF IMAGES FROM GEOSTATIONARY SATELLITE DATA FOR THE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Workshop on Satellites for Solar Energy Resource Information - Washington, DC, April 10-11, 1996 POTENTIALS OF IMAGES FROM GEOSTATIONARY SATELLITE DATA FOR THE ASSESSMENT OF SOLAR ENERGY PARAMETERS Lucien Author manuscript, published in "Workshop `satellites for solar energy resource information', Washington

  2. Network Perspectives on Communities

    E-Print Network [OSTI]

    Wolfe, Alvin W

    2006-01-01T23:59:59.000Z

    W W. Networks Fields and Organizations: Micro-Dynamics Scaleentitled “Networks, Fields and Organizations: Micro-

  3. An Anti_Turing Test: Reduced Variables for Social Network Friends' Recommendations

    E-Print Network [OSTI]

    Exman, Iaakov

    2014-01-01T23:59:59.000Z

    A routine activity of social networks servers is to recommend candidate friends that one may know and stimulate addition of these people to one's contacts. An intriguing issue is how these recommendation lists are composed. This work investigates the main variables involved in the recommendation activity, in order to reproduce these lists including its time dependent characteristics. We propose relevant algorithms. Besides conventional approaches, such as friend_of_a_friend, two techniques of importance have not been emphasized in previous works: randomization and direct use of interestingness criteria. An automatic software tool to implement these techniques is proposed. Its architecture and implementation are discussed. After a preliminary analysis of actual data collected from social networks, the tool is used to simulate social network friends' recommendations.

  4. Routing in hybrid networks

    E-Print Network [OSTI]

    Gupta, Avinash

    2001-01-01T23:59:59.000Z

    Hybrid networks are networks that have wired as well as wireless components. Several routing protocols exist for traditional wired networks and mobile ad-hoc networks. However, there are very few routing protocols designed for hybrid networks...

  5. Geospatial Visualization of Global Satellite Images with Vis-EROS

    SciTech Connect (OSTI)

    Standart, G. D.; Stulken, K. R.; Zhang, Xuesong; Zong, Ziliang

    2011-04-13T23:59:59.000Z

    The Earth Resources Observation and Science (EROS) Center of U.S. Geological Survey is currently managing and maintaining the world largest satellite images distribution system, which provides 24/7 free download service for researchers all over the globe in many areas such as Geology, Hydrology, Climate Modeling, and Earth Sciences. A large amount of geospatial data contained in satellite images maintained by EROS is generated every day. However, this data is not well utilized due to the lack of efficient data visualization tools. This software implements a method for visualizing various characteristics of the global satellite image download requests. More specifically, Keyhole Markup Language (KML) files are generated which can be loaded into an earth browser such as Google Earth. Colored rectangles associated with stored satellite scenes are painted onto the earth browser; and the color and opacity of each rectangle is varied as a function of the popularity of the corresponding satellite image. An analysis of the geospatial information obtained relative to specified time constraints provides an ability to relate image download requests to environmental, political, and social events.

  6. Modular Semantic Tagging of Medline Abstracts and its Use in Inferring Regulatory Networks

    SciTech Connect (OSTI)

    Verhagen, Marc; Pustejovsky, James; Taylor, Ronald C.; Sanfilippo, Antonio P.

    2011-09-19T23:59:59.000Z

    We describe MedstractPlus, a resource for mining relations from the Medline bibliographic database that is currently under construction. It was built on the remains of Medstract, a previously created resource that included a biorelation server and an acronym database. MedstractPlus uses simple and scalable natural language processing modules to structure text, is designed with reusability and extendibility in mind, and adheres to the philosophy of the Linguistic Annotation Framework. We show how MedstractPlus has been used to provide seeds for a novel approach to inferring transcriptional regulatory networks from gene expression data.

  7. Create a VirtualBox virtual machine Use Ubuntu Server 10.04 32-bit

    E-Print Network [OSTI]

    Crandall, Jedidiah R.

    expanding 8GB hard drive (default) Edit configuration of VM Add install CD under Storage Disable audio Leave a "lshw ­class network" and a "cat /etc/udev/rules.d/70-persistent-net.rules" to sanity-check Shutdown (the clone) edit /etc/udev/rules.d/70-persistent-net.rules (your MAC addresses should match

  8. Distributed Server Migration for Scalable Internet Service Deployment GEORGIOS SMARAGDAKIS NIKOLAOS LAOUTARIS KONSTANTINOS OIKONOMOU

    E-Print Network [OSTI]

    Smaragdakis, Georgios

    and demand information, and thus do not scale and are not practical for large networks. The key question full topology and demand information. We also show that it is responsive to volatile demand. Our@ionio.gr IOANNIS STAVRAKAKIS§ AZER BESTAVROS ioannis@di.uoa.gr best@cs.bu.edu Abstract-- The effectiveness

  9. Distributed Server Migration for Scalable Internet Service Deployment GEORGIOS SMARAGDAKIS + NIKOLAOS LAOUTARIS # KONSTANTINOS OIKONOMOU

    E-Print Network [OSTI]

    Smaragdakis, Georgios

    and demand information, and thus do not scale and are not practical for large networks. The key question full topology and demand information. We also show that it is responsive to volatile demand. Our@ionio.gr IOANNIS STAVRAKAKIS § AZER BESTAVROS # ioannis@di.uoa.gr best@cs.bu.edu Abstract--- The effectiveness

  10. Scaling of solid state lasers for satellite power beaming applications

    SciTech Connect (OSTI)

    Friedman, H.W.; Albrecht, G.F.; Beach, R.J.

    1994-01-01T23:59:59.000Z

    The power requirements for a satellite power beaming laser system depend upon the diameter of the beam director, the performance of the adaptive optics system, and the mission requirements. For an 8 meter beam director and overall Strehl ratio of 50%, a 30 kW laser at 850 nm can deliver an equivalent solar flux to a satellite at geostationary orbit. Advances in Diode Pumped Solid State Lasers (DPSSL) have brought these small, efficient and reliable devices to high average power and they should be considered for satellite power beaming applications. Two solid state systems are described: a diode pumped Alexandrite and diode pumped Thulium doped YAG. Both can deliver high average power at 850 nm in a single aperture.

  11. Modeling the Jovian subnebula: II - Composition of regular satellites ices

    E-Print Network [OSTI]

    Olivier Mousis; Yann Alibert

    2005-10-28T23:59:59.000Z

    We use the evolutionary turbulent model of Jupiter's subnebula described by Alibert et al. (2005a) to constrain the composition of ices incorporated in its regular icy satellites. We consider CO2, CO, CH4, N2, NH3, H2S, Ar, Kr, and Xe as the major volatile species existing in the gas-phase of the solar nebula. All these volatile species, except CO2 which crystallized as a pure condensate, are assumed to be trapped by H2O to form hydrates or clathrate hydrates in the solar nebula. Once condensed, these ices were incorporated into the growing planetesimals produced in the feeding zone of proto-Jupiter. Some of these solids then flowed from the solar nebula to the subnebula, and may have been accreted by the forming Jovian regular satellites. We show that ices embedded in solids entering at early epochs into the Jovian subdisk were all vaporized. This leads us to consider two different scenarios of regular icy satellites formation in order to estimate the composition of the ices they contain. In the first scenario, icy satellites were accreted from planetesimals that have been produced in Jupiter's feeding zone without further vaporization, whereas, in the second scenario, icy satellites were accreted from planetesimals produced in the Jovian subnebula. In this latter case, we study the evolution of carbon and nitrogen gas-phase chemistries in the Jovian subnebula and we show that the conversions of N2 to NH3, of CO to CO2, and of CO to CH4 were all inhibited in the major part of the subdisk. Finally, we assess the mass abundances of the major volatile species with respect to H2O in the interiors of the Jovian regular icy satellites. Our results are then compatible with the detection of CO2 on the surfaces of Callisto and Ganymede and with the presence of NH3 envisaged in subsurface oceans within Ganymede and Callisto.

  12. Silicon avalanche photodiode operation and lifetime analysis for small satellites

    E-Print Network [OSTI]

    Tan, Yue Chuan; Cheng, Cliff; Ling, Alexander

    2013-01-01T23:59:59.000Z

    Silicon avalanche photodiodes (APDs) are sensitive to operating temperature fluctuations and are also susceptible to radiation flux expected in satellite-based quantum experiments. We introduce a low power voltage adjusting mechanism to overcome the effects of in-orbit temperature fluctuations. We also present data on the performance of Si APDs after irradiation (gamma-ray and proton beam). Combined with an analysis of expected orbital irradiation, we propose that a Si APD in a 400 km equatorial orbit may operate beyond the lifetime of the satellite.

  13. Silicon avalanche photodiode operation and lifetime analysis for small satellites

    E-Print Network [OSTI]

    Yue Chuan Tan; Rakhitha Chandrasekara; Cliff Cheng; Alexander Ling

    2013-06-28T23:59:59.000Z

    Silicon avalanche photodiodes (APDs) are sensitive to operating temperature fluctuations and are also susceptible to radiation flux expected in satellite-based quantum experiments. We introduce a low power voltage adjusting mechanism to overcome the effects of in-orbit temperature fluctuations. We also present data on the performance of Si APDs after irradiation (gamma-ray and proton beam). Combined with an analysis of expected orbital irradiation, we propose that a Si APD in a 400 km equatorial orbit may operate beyond the lifetime of the satellite.

  14. University of Northern British Columbia & BC Rural & Remote Health Research Network

    E-Print Network [OSTI]

    Bolch, Tobias

    University of Northern British Columbia & BC Rural & Remote Health Research Network Provincial in the province. The University of Northern British Columbia is the secretariat for the BCRRHRN and satellite sites are located at the University of British Columbia and the University of Victoria. Duties

  15. IEEE Network September/October 200018 ver the past few years, there has been tremen-

    E-Print Network [OSTI]

    Wong, Vincent

    -way paging, mobile satellite, etc.) into a seamless radio infrastructure capable of offering a wide range network (PCN) is being standard- ized as part of the International Mobile Telecommunications 2000 (IMT via the base stations. Cells can have dif- ferent sizes: picocells are commonly used in indoor

  16. Unsupervised Feature Learning for High-Resolution Satellite Image Classification

    SciTech Connect (OSTI)

    Cheriyadat, Anil M [ORNL

    2013-01-01T23:59:59.000Z

    The rich data provided by high-resolution satellite imagery allow us to directly model geospatial neighborhoods by understanding their spatial and structural patterns. In this paper we explore an unsupervised feature learning approach to model geospatial neighborhoods for classification purposes. While pixel and object based classification approaches are widely used for satellite image analysis, often these approaches exploit the high-fidelity image data in a limited way. In this paper we extract low-level features to characterize the local neighborhood patterns. We exploit the unlabeled feature measurements in a novel way to learn a set of basis functions to derive new features. The derived sparse feature representation obtained by encoding the measured features in terms of the learned basis function set yields superior classification performance. We applied our technique on two challenging image datasets: ORNL dataset representing one-meter spatial resolution satellite imagery representing five land-use categories and, UCMERCED dataset consisting of 21 different categories representing sub-meter resolution overhead imagery. Our results are highly promising and, in the case of UCMERCED dataset we outperform the best results obtained for this dataset. We show that our feature extraction and learning methods are highly effective in developing a detection system that can be used to automatically scan large-scale high-resolution satellite imagery for detecting large-facility.

  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. Drinkwater accumulation on the Greenland ice sheet. Microwave radar backscatter images of Greenland are derived using (or decrease) in net snow accumulation on the polar ice caps. The net mass balance of the Greenland

  18. Fisheries Applications of Satellite Data in the Eastern North Pacific

    E-Print Network [OSTI]

    is particularly useful. However, satellite measurements are usually limited to the surface or near- surface layers radiance from the earth's surface in visible, thermal infrared (IR), and microwave wavelength bands (Table by reflection from the sea surface and clouds, and by absorption, emission, and scatter by atmospheric

  19. Update on the Solar Power Satellite transmitter design

    SciTech Connect (OSTI)

    Brown, W.C.

    1986-01-01T23:59:59.000Z

    A number of remaining problems in the conceptual design of the transmitting antenna for the Solar Power Satellite have been solved as a result of additional technology development. Much of the technology was derived from the conceptual design of a ground-based transmitting antenna for beaming power to a high altitude airship or airplane.

  20. SATELLITE BASED SHORT-TERM FORECASTING OF SOLAR IRRADANCE

    E-Print Network [OSTI]

    Heinemann, Detlev

    SATELLITE BASED SHORT-TERM FORECASTING OF SOLAR IRRADANCE - COMPARISON OF METHODS AND ERROR Forecasting of solar irradiance will become a major issue in the future integration of solar energy resources method was used to derive motion vector fields from two consecutive images. The future image

  1. Data needs for X-ray astronomy satellites

    SciTech Connect (OSTI)

    Kallman, T. [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

    2013-07-11T23:59:59.000Z

    I review the current status of atomic data for X-ray astronomy satellites. This includes some of the astrophysical issues which can be addressed, current modeling and analysis techniques, computational tools, the limitations imposed by currently available atomic data, and the validity of standard assumptions. I also discuss the future: challenges associated with future missions and goals for atomic data collection.

  2. Wind energy calculated from SAR and scatterometer satellite data

    E-Print Network [OSTI]

    . · Offshore wind resources estimated from SAR · On WASP · Wind indexing based on scatterometer · Wake effects footprint 62 m footprint Wind field maps from SAR are valid for 10 m height #12;7 Slide no. 62 m 10 m Upwind1 Slide no. 4 Wind energy calculated from SAR and scatterometer satellite data Charlotte Bay

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

    E-Print Network [OSTI]

    de Weck, Olivier L.

    panels cellsbatteryN number of battery cells DCP high power amplifier input DC power PRF amplifier output RF power BOLcellP solar cell beginning of life power EOL power of cellP solar cell end of life power of commercial communication satellites. NOMENCLATURE SAA solar array area radiatorA thermal radiator area c

  4. Using Belief Functions to Forecast Demand for Mobile Satellite Services

    E-Print Network [OSTI]

    McBurney, Peter

    Using Belief Functions to Forecast Demand for Mobile Satellite Services Peter McBurney and Simon.j.mcburney,s.d.parsonsg@elec.qmw.ac.uk Abstract. This paper outlines an application of belief functions to forecasting the demand for a new service in a new category, based on new technology. Forecasting demand for a new product or service

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

    E-Print Network [OSTI]

    Waliser, Duane E.

    LETTERS Satellite measurements of the clear-sky greenhouse effect from tropospheric ozone HELEN M of 0.48±0.14 W m-2 between 45 S and 45 N. This estimate of the clear-sky greenhouse effect from

  6. High-precision photometry with the WIRE satellite

    E-Print Network [OSTI]

    H. Bruntt; D. L. Buzasi

    2005-09-15T23:59:59.000Z

    Around 200 bright stars (V tracker on the WIRE satellite since observations started in 1999. Here we present new results for the solar-like star Procyon A, the two Delta Scuti stars Altair and Epsilon Cephei, and the triple system Lambda Scorpii which consist of two B-type stars -- one of which we find to be an eclipsing binary.

  7. NOAA Satellite and Information Service Deep Space Climate Observatory (DSCOVR)

    E-Print Network [OSTI]

    such as the commercial airline, electric power and GPS industries. Our national security and economic well-being, whichNOAA Satellite and Information Service Deep Space Climate Observatory (DSCOVR) Background: DSCOVR will maintain the Nation's solar wind observations, which are critical to maintaining the accuracy and lead time

  8. Responsive Systems Comparison Method: Dynamic Insights into Designing a Satellite

    E-Print Network [OSTI]

    de Weck, Olivier L.

    System (SRS) Critical issue in national security space ­ Unique all-weather surveillance capability) National Security Strategy/Policy National Security Strategy/Policy Resources (fungible assetsResponsive Systems Comparison Method: Dynamic Insights into Designing a Satellite Radar System Adam

  9. Molecular biology study of satellite panicum mosaic virus capsid protein

    E-Print Network [OSTI]

    Qi, Dong

    2009-05-15T23:59:59.000Z

    Satellite panicum mosaic virus (SPMV) depends on its helper Panicum mosaic virus (PMV) for replication and movement in host plants. The positive-sense single-stranded genomic RNA of SPMV encodes a 17-kDa capsid protein (CP) to form 16-nm virions...

  10. 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

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

    E-Print Network [OSTI]

    through prevention, minimization, and recycling · Classroom or one-on-one waste generator training, other DOE and University waste organizations · Flammable waste cans, 30-gallon, 55-gallon drums (steelCompliance of Hazardous Waste Satellite Accumulation Areas (SAAs) All Hazardous waste generated

  12. 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

  13. Solar Power Satellites: Creating the Market for Beamed Energy Propulsion

    SciTech Connect (OSTI)

    Coopersmith, Jonathan [Dept. of History, Texas A and M University, College Station, TX 77843 (United States)

    2010-05-06T23:59:59.000Z

    Beamed energy advocates must investigate the potential of major markets like space based solar satellites and space-based nuclear waste disposal. For BEP to succeed, its proponents must work with these possible users to generate interest and resources needed to develop BEP.

  14. Small Satellite Applications of Commercial off the Shelf Radio Frequency Integrated Circuits

    E-Print Network [OSTI]

    Graves, John

    2012-02-14T23:59:59.000Z

    small satellite, Orbiting Satellite Carrying Amateur Radio (OSCAR) UO-14, was launched in 1990 [15]. While these amateur radio speeds may be sufficient for requirements of the aforementioned missions, they do very little towards expanding future...

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

    E-Print Network [OSTI]

    Davis, Mark J. (Mark Jeffrey)

    2008-01-01T23:59:59.000Z

    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 ...

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

    E-Print Network [OSTI]

    National Oceanic and Atmospheric Administration | NOAA Satellite and Information Service Two Orbits, One Mission Mission The NATIONAL ENVIRONMENTAL SATELLITE, DATA AND INFORMATION SERVICE (NESDIS to promote, protect and enhance the Nation's economy, security, environment and quality of life. To fulfill

  17. Recent Changes in Arctic Vegetation: Satellite Observations and Simulation Model Predictions

    E-Print Network [OSTI]

    Bhatt, Uma

    Chapter 2 Recent Changes in Arctic Vegetation: Satellite Observations and Simulation Model with a combination of satellite observations (Fig. 2.1) and field mea- surements, as projected by simulation modeling

  18. Managing Energy and Server Resources in Hosting Centers Jeffrey S. Chase, Darrell C. Anderson, Prachi N. Thakar, Amin M. Vahdat \\Lambda

    E-Print Network [OSTI]

    Chase, Jeffrey S.

    resource allotments by estimating the value of their effects on service performance. A greedy resource surges and capital costs for excess capacity. Hosting centers face familiar operating system challengesManaging Energy and Server Resources in Hosting Centers Jeffrey S. Chase, Darrell C. Anderson

  19. T-534: Vulnerability in the PDF distiller of the BlackBerry Attachment Service for the BlackBerry Enterprise Server

    Broader source: Energy.gov [DOE]

    BlackBerry advisory describes a security issue that the BlackBerry Attachment Service component of the BlackBerry Enterprise Server is susceptible to. The issue relates to a known vulnerability in the PDF distiller component of the BlackBerry Attachment Service that affects how the BlackBerry Attachment Service processes PDF files.

  20. \\\\server05\\productn\\C\\CJP\\14-1\\CJP102.txt unknown Seq: 1 24-FEB-05 17:48 REGULATING OFFSHORE WIND POWER AND

    E-Print Network [OSTI]

    Firestone, Jeremy

    \\\\server05\\productn\\C\\CJP\\14-1\\CJP102.txt unknown Seq: 1 24-FEB-05 17:48 REGULATING OFFSHORE WIND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 R A. OFFSHORE AQUACULTURE (MARICULTURE) . . . . . . . . . . . 74 R B. OFFSHORE WIND POWER PRODUCTION . . . . . . . . . . . . . . . 75 R C. POTENTIAL CONNECTIONS AMONG OFFSHORE WIND POWER, MARINE

  1. PHP Script Documentation for .include Pages in CODA Repositories To be able to make this work for you, your web server must be php-enabled. Please contact

    E-Print Network [OSTI]

    Koch, Christof

    PHP Script Documentation for .include Pages in CODA Repositories To be able to make this work for you, your web server must be php-enabled. Please contact your web administrator about this. This PDF of the script preceding the ".include". To be able to make this work for you, your browser must have PHP scripts

  2. The image database stores metadata and URL addresses to JPEG images stored on a web server.Each image on the web

    E-Print Network [OSTI]

    Hall, Sharon J.

    The image database stores metadata and URL addresses to JPEG images stored on a web server. This database integration would allow for the production of guides that could carry titles such as Flora for the production of both custom keys and natural language descriptions.This database structure was initially based

  3. 1. Visit the University Registrar's homepage: www.reg.uci.edu Note: To use the Registrar's secure web server, AOL users need to minimize the

    E-Print Network [OSTI]

    Rose, Michael R.

    web server, AOL users need to minimize the AOL browser and instead open Internet Explorer, Firefox, Safari, Opera, or their alternate web browser of choice. Hover your cursor over Faculty/Staff, slide to Services, and then click on WebRoster. WEBROSTER TUTORIAL University Registrar University of California

  4. CAH and Shared Services Transition Plan CAH will move seven servers that provide daily operational services such as user authentication and access, central file

    E-Print Network [OSTI]

    Wu, Shin-Tson

    CAH and Shared Services Transition Plan CAH will move seven servers that provide daily operational the university's NET domain. Domains provide user authentication, access, and management to resources divide the transition plan, and each phase has goals and a deadline. The overall goal is to continue

  5. apache ii system: Topics by E-print Network

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

    2.4 and to test different types of connections between front-end Apache server and back-end application servers, namely Apache Tomcat and WebLogic, with SSL support. Hubinek,...

  6. Computing and Visualizing Reachable Volumes for Maneuvering Satellites

    SciTech Connect (OSTI)

    Jiang, M; de Vries, W H; Pertica, A J; Olivier, S S

    2011-09-11T23:59:59.000Z

    Detecting and predicting maneuvering satellites is an important problem for Space Situational Awareness. The spatial envelope of all possible locations within reach of such a maneuvering satellite is known as the Reachable Volume (RV). As soon as custody of a satellite is lost, calculating the RV and its subsequent time evolution is a critical component in the rapid recovery of the satellite. In this paper, we present a Monte Carlo approach to computing the RV for a given object. Essentially, our approach samples all possible trajectories by randomizing thrust-vectors, thrust magnitudes and time of burn. At any given instance, the distribution of the 'point-cloud' of the virtual particles defines the RV. For short orbital time-scales, the temporal evolution of the point-cloud can result in complex, multi-reentrant manifolds. Visualization plays an important role in gaining insight and understanding into this complex and evolving manifold. In the second part of this paper, we focus on how to effectively visualize the large number of virtual trajectories and the computed RV. We present a real-time out-of-core rendering technique for visualizing the large number of virtual trajectories. We also examine different techniques for visualizing the computed volume of probability density distribution, including volume slicing, convex hull and isosurfacing. We compare and contrast these techniques in terms of computational cost and visualization effectiveness, and describe the main implementation issues encountered during our development process. Finally, we will present some of the results from our end-to-end system for computing and visualizing RVs using examples of maneuvering satellites.

  7. 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

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

    E-Print Network [OSTI]

    Abstract Satellite remote sensing of ocean wind fields from Synthetic Aperture Radar (SAR) observations are observed and discussed. The satellite wind fields are compared to in-situ observations from a tall offshore of the possibility to map the wake effect of the wind farm from satellite SAR observations. The wake is observed

  9. Observation of laser satellites in a plasma produced by a femtosecond laser pulse

    E-Print Network [OSTI]

    Umstadter, Donald

    that the laser x-ray satellites were predicted more than 20 years ago, they had not been observed until veryObservation of laser satellites in a plasma produced by a femtosecond laser pulse S. A. Pikuz P. N­459 10 October 1997 Laser satellites are detected in the emission spectra of magnesium and aluminum

  10. Model-Based Telerobotic Control with Virtual Fixtures For Satellite Servicing Tasks

    E-Print Network [OSTI]

    Whitcomb, Louis L.

    the tape that secures a flap of multi-layer insulation over the access panel of a satellite mockup. I its national capability to perform on- orbit repair of satellites in low-earth orbit, and evenModel-Based Telerobotic Control with Virtual Fixtures For Satellite Servicing Tasks Tian Xia, Simon

  11. Since the first manmade satellites orbited the earth in the 1950s, space

    E-Print Network [OSTI]

    Reuter, Martin

    essential to national security. Satellites provide communica- tions and navigation for military per- sonnelSince the first manmade satellites orbited the earth in the 1950s, space assets have become. Naval strategists use satellite surveillance data to monitor ship move- ments, while meteorologists

  12. 2013 Accomplishments Report NOAA Satellite and Information Service | www.nesdis.noaa.gov

    E-Print Network [OSTI]

    satellites and other sources to promote, protect and enhance the Nation's economy, security, environment2013 Accomplishments Report NOAA Satellite and Information Service | www.nesdis.noaa.gov #12;1 From the Assistant Administrator 2 Satellites 4 Climate 6 Weather 8 Oceans 10 Coasts 12 Partnerships & Outreach 13

  13. 1Hinode Satellite Power The Hinode satellite weighs approximately 700 kg (dry) and carries 170 kg of gas for

    E-Print Network [OSTI]

    for up to two years. The satellite has two solar panels (blue) that produce all of the spacecraft's power. The panels are 4 meters long and 1 meter wide, and are covered on both sides by solar cells. Problem 1 - What is the total area of the solar panels covered by solar cells in square centimeters? Problem 2 - If a solar cell

  14. Irregular Satellites of the Planets: Products of Capture in the Early Solar System

    E-Print Network [OSTI]

    David Jewitt; Nader Haghighipour

    2007-03-03T23:59:59.000Z

    All four giant planets in the Solar system possess irregular satellites, characterized by large, highly eccentric and/or inclined orbits that are distinct from the nearly circular, uninclined orbits of the regular satellites. This difference can be traced directly to different modes of formation. Whereas the regular satellites grew by accretion within circumplanetary disks the irregular satellites were captured from initially heliocentric orbits at an early epoch. Recently, powerful survey observations have greatly increased the number of known irregular satellites, permitting a fresh look at the group properties of these objects and motivating a re-examination of the mechanisms of capture. None of the suggested mechanisms, including gas-drag, pull-down, and three-body capture, convincingly fit the group characteristics of the irregular satellites. The sources of the satellites also remain unidentified.

  15. Global temperatures using satellite and numerical model assimilated data

    SciTech Connect (OSTI)

    Basist, A.; Ropelewski, C.; Grody, N. (NOAA/NWS/NMC, Washington, DC (United States) NOAA/NESDIS, Washington, DC (United States))

    1994-01-01T23:59:59.000Z

    The Microwave Sounding Unit (MSU) aboard the National Oceanic and Atmospheric Administration (NOAA) series of polar orbiting satellites (TIROS-N to NOAA-11) have provided stable, precise measurements of vertically integrated, atmospheric temperature since December 1978. In this study, comparisons are made between the MSU channel measurements and those derived from the Global Data Assimilation System (GDAS) at the National Meteorological Center (NMC) over the period 1979 to 1990. Land areas rich in Radiosonde Observations (RAOBS) showed similar magnitudes of spatial variability between the NMC GDAS and the MSU temperatures. Excessive spatial variability can be noted in the GDAS over land areas where conventional data is poor. Over the ocean, however, the assimilation of satellite data into the model improves the spatial variability detected by the GDAS.

  16. Aerodynamic Stability of Satellites in Elliptic Low Earth Orbits

    E-Print Network [OSTI]

    Bailey, Matthew; Mancas, Stefan C; Udrea, Bogdan; Umeadi, Uchenna

    2013-01-01T23:59:59.000Z

    Topical observations of the thermosphere at altitudes below $200 \\, km$ are of great benefit in advancing the understanding of the global distribution of mass, composition, and dynamical responses to geomagnetic forcing, and momentum transfer via waves. The perceived risks associated with such low altitude and short duration orbits has prohibited the launch of Discovery-class missions. Miniaturization of instruments such as mass spectrometers and advances in the nano-satellite technology, associated with relatively low cost of nano-satellite manufacturing and operation, open an avenue for performing low altitude missions. The time dependent coefficients of a second order non-homogeneous ODE which describes the motion have a double periodic shape. Hence, they will be approximated using Jacobi elliptic functions. Through a change of variables the original ODE will be converted into Hill's ODE for stability analysis using Floquet theory. We are interested in how changes in the coefficients of the ODE affect the ...

  17. Finding the Force -- Consistent Particle Seeding for Satellite Aerodynamics

    E-Print Network [OSTI]

    Parham, J Brent

    2013-01-01T23:59:59.000Z

    When calculating satellite trajectories in low-earth orbit, engineers need to adequately estimate aerodynamic forces. But to this day, obtaining the drag acting on the complicated shapes of modern spacecraft suffers from many sources of error. While part of the problem is the uncertain density in the upper atmosphere, this works focuses on improving the modeling of interacting rarified gases and satellite surfaces. The only numerical approach that currently captures effects in this flow regime---like self-shadowing and multiple molecular reflections---is known as test-particle Monte Carlo. This method executes a ray-tracing algorithm to follow particles that pass through a control volume containing the spacecraft and accumulates the momentum transfer to the body surfaces. Statistical fluctuations inherent in the approach demand particle numbers in the order of millions, often making this scheme too costly to be practical. This work presents a parallel test-particle Monte Carlo method that takes advantage of b...

  18. Image deblurring, Spectrum Interpolation and Application to Satellite Imaging

    E-Print Network [OSTI]

    Malgouyres, François

    of the satellite and the imperfection of the optics for the blur and the electronics of the captors for the noise operator H \\Gamma1 defined by H \\Gamma1 (u) = ` 1 â?? h â?? u ' â?? ; where â?? u denotes the Fourier transform of u and u â?? its inverse Fourier transform. Applying H \\Gamma1 to (1), we obtain H \\Gamma1 (u 0 ) = u1

  19. Toshiba recommends Windows 7 Satellite L750-12T

    E-Print Network [OSTI]

    Saskatchewan, University of

    Lithium Ion (Li-ion) 10.8V x 48Wh capacity Battery Life: Up to 5.5 hours (Dependent on usage) Dimensions) Dimensions: (WxHxD) 107 x 47 x 30.5 mm Weight: 250g Battery Battery Type: Removable, Rechargeable 6-cell This Satellite notebook comes with a one (1) year parts and labour Limited Warranty. Note the original battery

  20. The international status of intelligence-collecting reconnaissance satellites

    E-Print Network [OSTI]

    Gates, Brent Allen

    1972-01-01T23:59:59.000Z

    May 1972 Major Subject: Political Science THE INTERNATIONAL STATUS OF INTELLIGENCE- COLLECTING RECONNAISSANCE SATELLITES A Thesis by BRENT ALLEN GATES Approved as to style and content by: (Chairman of Commit e) 09JD ' J 'd (Head of Department... and legal issues surrounding aerial reconnaissance are examined. It is shown that the rapid technological evolution of spaceborne reconnaissance systems which is taking place in the absence of international agreements governing these systems is a...

  1. Secure and efficient wireless networks

    E-Print Network [OSTI]

    Bellardo, John Michael

    2006-01-01T23:59:59.000Z

    CA Systems and Network Administrator California Integrationgives the campus network administrators complete admissionin engineered networks, enterprise administrators try to

  2. International Satellite Cloud Climatology Project (ISCCP) Radiance Calibration Report

    E-Print Network [OSTI]

    William Rossow; Yves Desormeaux; Christopher L. Brest; Alison Walker

    1992-01-01T23:59:59.000Z

    This document describes the radiance calibrations used for all ISCCP Stage B3 data for the period July 1983 through June 1991 (Schiffer and Rossow 1985; Rossow et al. 1987; Brest and Rossow 1992; Desormeaux et al. 1992). Calibration is reported in three stages, called nominal, normalized and absolute. Equations and tables in the following sections define each of these calibrations. 1.1. NOMINAL CALIBRATION The nominal calibration (first set of tables on Stage B3 data tapes) represents the best information available at the start of processing of data from a particular satellite, usually the pre-launch calibration supplied by the satellite operator for the visible (VIS) channel (and other channels at solar wavelengths) and an equation or table used to interpret on-board calibration information for the infrared (IR) channel (and other channels at thermal infrared wavelengths). Specific details are given for each satellite in sections to follow. In this document, VIS radiances are given as "scaled radiances", L

  3. Dynamic characterization of satellite components through non-invasive methods

    SciTech Connect (OSTI)

    Mullins, Joshua G [Los Alamos National Laboratory; Wiest, Heather K [Los Alamos National Laboratory; Mascarenas, David D. L. [Los Alamos National Laboratory; Macknelly, David [INST-OFF/AWE; Park, Gyuhae [Los Alamos National Laboratory

    2010-10-21T23:59:59.000Z

    The rapid deployment of satellites is hindered by the need to flight-qualify their components and the resulting mechanical assembly. Conventional methods for qualification testing of satellite components are costly and time consuming. Furthermore, full-scale vehicles must be subjected to launch loads during testing. This harsh testing environment increases the risk of component damage during qualification. The focus of this research effort was to assess the performance of Structural Health Monitoring (SHM) techniques as a replacement for traditional vibration testing. SHM techniques were applied on a small-scale structure representative of a responsive satellite. The test structure consisted of an extruded aluminum space-frame covered with aluminum shear plates, which was assembled using bolted joints. Multiple piezoelectric patches were bonded to the test structure and acted as combined actuators and sensors. Various methods of SHM were explored including impedance-based health monitoring, wave propagation, and conventional frequency response functions. Using these methods in conjunction with finite element modelling, the dynamic properties of the test structure were established and areas of potential damage were identified and localized. The adequacy of the results from each SHM method was validated by comparison to results from conventional vibration testing.

  4. Satellite Parallaxes of Lensing Events Towards the Galactic Bulge

    E-Print Network [OSTI]

    B. Scott Gaudi; Andrew Gould

    1996-08-20T23:59:59.000Z

    In order to understand the nature of the lenses that generate microlensing events, one would like to measure their mass, distance, and velocity. Unfortunately, current microlensing experiments measure only one parameter of the events, the characteristic timescale, which is a combination of the underlying physical parameters. Other methods are required to extract additional information. Parallax measurements using a satellite in an Earth-like orbit yield the projected velocity of the lens: ${\\bf{\\tilde v}} ={\\bf{v}}/(1-z)$, where ${\\bf{v}}$ is the transverse velocity (speed and direction) of the lens relative to the Earth-source line of sight, and $z$ is the ratio of the distances to the lens and the source. A measurement of ${\\bf{\\tilde v}}$ could distinguish between lenses belonging to the bulge and disk populations. We show that for photometric precisions of 1% to 2%, it is possible to measure the projected speed, $\\tilde v$, to an accuracy of $\\leq 10%$ for over 70% of disk lenses and over 60% of bulge lenses. For measuring the projected velocity ${\\bf{\\tilde v}}$, the percentages are 40% and {30%}, respectively. We find lines of sight $> 2^{\\circ}$ away from the ecliptic are preferable, and an Earth-satellite separation in the range $0.7 {\\rm{AU}} - 1.9{\\rm{AU}}$ is optimal. The requirements of the satellite for measuring the projected velocities of events towards the bulge are similar to those for measurements toward the LMC.

  5. THE EXTREME SMALL SCALES: DO SATELLITE GALAXIES TRACE DARK MATTER?

    SciTech Connect (OSTI)

    Watson, Douglas F.; Berlind, Andreas A.; McBride, Cameron K. [Department of Physics and Astronomy, Vanderbilt University, 1807 Station B, Nashville, TN 37235 (United States); Hogg, David W.; Jiang Tao [Center for Cosmology and Particle Physics, Department of Physics, New York University, New York, NY 10003 (United States)

    2012-04-10T23:59:59.000Z

    We investigate the radial distribution of galaxies within their host dark matter halos as measured in the Sloan Digital Sky Survey by modeling their small-scale clustering. Specifically, we model the Jiang et al. measurements of the galaxy two-point correlation function down to very small projected separations (10 h{sup -1} kpc {<=} r {<=} 400 h{sup -1} kpc), in a wide range of luminosity threshold samples (absolute r-band magnitudes of -18 up to -23). We use a halo occupation distribution framework with free parameters that specify both the number and spatial distribution of galaxies within their host dark matter halos. We assume one galaxy resides in the halo center and additional galaxies are considered satellites that follow a radial density profile similar to the dark matter Navarro-Frenk-White (NFW) profile, except that the concentration and inner slope are allowed to vary. We find that in low luminosity samples (M{sub r} < -19.5 and lower), satellite galaxies have radial profiles that are consistent with NFW. M{sub r} < -20 and brighter satellite galaxies have radial profiles with significantly steeper inner slopes than NFW (we find inner logarithmic slopes ranging from -1.6 to -2.1, as opposed to -1 for NFW). We define a useful metric of concentration, M{sub 1/10}, which is the fraction of satellite galaxies (or mass) that are enclosed within one-tenth of the virial radius of a halo. We find that M{sub 1/10} for low-luminosity satellite galaxies agrees with NFW, whereas for luminous galaxies it is 2.5-4 times higher, demonstrating that these galaxies are substantially more centrally concentrated within their dark matter halos than the dark matter itself. Our results therefore suggest that the processes that govern the spatial distribution of galaxies, once they have merged into larger halos, must be luminosity dependent, such that luminous galaxies become poor tracers of the underlying dark matter.

  6. E-Print Network 3.0 - astron satellites Sample Search Results

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

    - Department of Astronomy, University of Maryland at College Park Collection: Physics 32 IAC-09.A3.4.3 A NOVEL ASTRONOMICAL APPLICATION FOR FORMATION FLYING SMALL Summary: Page 1...

  7. autonomous agile micro-satellites: Topics by E-print Network

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

    mission for gamma-ray burst multi-wavelength observations CERN Preprints Summary: Gamma-ray bursts (GRB), at least those with a duration longer than a few seconds are the most...

  8. E-Print Network 3.0 - aluminum alloy satellite Sample Search...

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

    descriptions of the structures and show that nickel atoms react with aluminum ... Source: Smith, Richard J. - Department of Physics, Montana State University Collection: Materials...

  9. E-Print Network 3.0 - aster terra satellite Sample Search Results

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

    VOLCANO CAPTURED WITH ASTER: A PROPOSAL TO INTEGRATE HIGH-RESOLUTION REMOTE SENSING DATA INTO REAL-TIME ERUPTION Summary: high spatial resolution instrument onboard the Terra...

  10. Distributed satellite communications system design : first-order interactions between system and network architectures

    E-Print Network [OSTI]

    Underwood, Jennifer E. (Jennifer Elizabeth)

    2005-01-01T23:59:59.000Z

    Humanity now exists in the midst of the fast-moving Information Age, a period of history characterized by fast travel and even faster information transfer. As data becomes seemingly more valuable than physical possessions, ...

  11. E-Print Network 3.0 - anti-satellite systems Sample Search Results

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

    Polytechnic Institute Collection: Computer Technologies and Information Sciences 28 Renewable Resources Journal, Vol. 24, No. 2, pp. 19-23, Summer 2006 Science and Technology...

  12. E-Print Network 3.0 - alpha satellite subset Sample Search Results

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

    and Astronautics, Massachusetts Institute of Technology (MIT) Collection: Engineering 40 WIND Measurements of Proton and Alpha Particle Flow and Number Density J. T. Steinberg...

  13. E-Print Network 3.0 - alos satellite imagery Sample Search Results

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

    3 12;4 Disaster Monitoring (Earthquake in Haiti, Jan 2010) ALOS AVNIR-2 ALOS PALSAR... Wind, SST , Water vapor Phase B Precipitation CO2, Methane GCOM-W2 GOSAT-2 ALOS-3...

  14. E-Print Network 3.0 - ancestral alpha satellites Sample Search...

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

    College London Collection: Environmental Sciences and Ecology ; Biology and Medicine 30 WIND Measurements of Proton and Alpha Particle Flow and Number Density J. T. Steinberg...

  15. December 5, 2013 SPARTAN: A Global Network to Evaluate and Enhance Satellite-Based1

    E-Print Network [OSTI]

    Martin, Randall

    , Vancouver, British Columbia, Canada 18 Health Effects Institute, 101 Federal Street Suite 500, Boston, MA

  16. Cyclone Track Forecasting Based on Satellite Images Using Artificial Neural Networks

    E-Print Network [OSTI]

    Kovordányi, Rita

    ). Some of the more known examples include the Bangladesh cyclone of November 12, 1970 and May 24, 1985 casualties and considerable economic damage in tropical countries. For these reasons substantial resources

  17. E-Print Network 3.0 - alouette satellites Sample Search Results

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

    RESEARCH FOREST T H E U N I V E R S I T Y O F B R I T I S H C O L U M B I A Summary: of a micro-hydro electric generation facility on the North Alouette River were put on hold due...

  18. E-Print Network 3.0 - alloy satellite boxes Sample Search Results

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

    tantalum-base alloys (e... .g. Ta-8W-2Hf), niobium alloys (Nb-1Zr), and molybdenum and tungsten ... Source: California at Los Angeles, University of - School of Engineering...

  19. Network Connections

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Regionat Cornell Batteries &NSTCurrent Issues &Network » Network

  20. Tourism networks and computer networks

    E-Print Network [OSTI]

    Baggio, Rodolfo

    2008-01-01T23:59:59.000Z

    The body of knowledge accumulated in recent years on the structure and the dynamics of complex networks has offered useful insights on the behaviour of many natural and artificial complex systems. The analysis of some of these, namely those formed by companies and institutions, however, has proved problematical mainly for the difficulties in collecting a reasonable amount of data. This contribution argues that the World Wide Web can provide an efficient and effective way to gather significant samples of networked socio-economic systems to be used for network analyses and simulations. The case discussed refers to a tourism destination, the fundamental subsystem of an industry which can be considered one of the most important in today's World economy.

  1. Monte Carlo Simulations of Macho Parallaxes From a Satellite

    E-Print Network [OSTI]

    Thomas Boutreux; Andrew Gould

    1995-07-25T23:59:59.000Z

    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.

  2. Near-infrared photometry of the Galilean satellites

    SciTech Connect (OSTI)

    Tittemore, W.C.; Sinton, W.M.

    1989-01-01T23:59:59.000Z

    The present near-IR (2.2-, 3.8-, 4.8-micron) lightcurves and phase coefficients for the Galilean satellites notes the geometric albedo of Io to include volcanic emission at the two longer wavelengths, although no major outbursts were detected during the 1982-1983 period of these observations. The trend of decreasing albedo with increasing wavelength exhibited by Ganymede and Europa is consistent with their possession of icy surfaces. The results obtained for Callisto are consistent with visible-wavelength observations of other dark solar system objects. 35 references.

  3. Satellite Remote Sensing of Mid-level Clouds

    E-Print Network [OSTI]

    Jin, Hongchun 1980-

    2012-11-07T23:59:59.000Z

    , the International Satellite Cloud Cli- matology Project (ISCCP, Rossow and Schi er 1999) and TIROS-N Observational Vertical Sounders Path-B (TOVS-B, Stubenrauch et al. 2006) are both long-term global climatologies that de ne mid-level clouds as having cloud top... devoted to establishing global cloud climatolo- gies, however, working de nitions or the classi cation of mid-level clouds vary with observational technique, region, and purpose (Poore et al. 1995; Hahn and Warren 1999; Rossow and Schi er 1999; Hahn...

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

    SciTech Connect (OSTI)

    Cai, D Michael [Los Alamos National Laboratory

    2011-01-18T23:59:59.000Z

    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.

  5. Network Embedded Systems Sensor Networks

    E-Print Network [OSTI]

    Amir, Yair

    Battery Energy Reserve Manager = Bank Each task requests an account with conditions W ­ fraction Tracking 9 #12;Virtual Battery: An Energy Reserve Abstraction for Embedded Sensor Networks Qing Cao of real battery allocated N ­ number of energy installments L ­ expected lifetime of the task C

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

    E-Print Network [OSTI]

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

    2006-01-24T23:59:59.000Z

    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.

  7. Uncertainty for Satellite and Station Solar Data in the Updated NSRDB

    SciTech Connect (OSTI)

    Myers, D. R.

    2008-10-29T23:59:59.000Z

    Solar Resource Assessment Workshop, Denver CO, Oct 29, 2008 presentation: Uncertainty for Satellite and Station Solar Data in the Updated NSRDB,

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

    E-Print Network [OSTI]

    Jilla, Cyrus D., 1974-

    2002-01-01T23:59:59.000Z

    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 ...

  9. 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...

  10. Reducing the Disk I/O of Web Proxy Server Caches Carlos Maltzahn and Kathy J. Richardson

    E-Print Network [OSTI]

    Maltzahn, Carlos

    Computer Corporation Network Systems Laboratory Palo Alto, CA carlosm@cs.colorado.edu, kjr@pa.dec.com Dirk-like fashion with the amount of traffic and the size of the client population [16, 11, 8] as well

  11. A semi-automatic method for extracting thin line structures in images as rooted tree network

    SciTech Connect (OSTI)

    Brazzini, Jacopo [Los Alamos National Laboratory; Dillard, Scott [Los Alamos National Laboratory; Soille, Pierre [EC - JRC

    2010-01-01T23:59:59.000Z

    This paper addresses the problem of semi-automatic extraction of line networks in digital images - e.g., road or hydrographic networks in satellite images, blood vessels in medical images, robust. For that purpose, we improve a generic method derived from morphological and hydrological concepts and consisting in minimum cost path estimation and flow simulation. While this approach fully exploits the local contrast and shape of the network, as well as its arborescent nature, we further incorporate local directional information about the structures in the image. Namely, an appropriate anisotropic metric is designed by using both the characteristic features of the target network and the eigen-decomposition of the gradient structure tensor of the image. Following, the geodesic propagation from a given seed with this metric is combined with hydrological operators for overland flow simulation to extract the line network. The algorithm is demonstrated for the extraction of blood vessels in a retina image and of a river network in a satellite image.

  12. A Pair of Bootes: A New Milky Way Satellite

    E-Print Network [OSTI]

    S. M. Walsh; H. Jerjen; B. Willman

    2007-05-10T23:59:59.000Z

    As part of preparations for a southern sky search for faint Milky Way dwarf galaxy satellites, we report the discovery of a stellar overdensity in the Sloan Digital Sky Survey Data Release 5, lying at an angular distance of only 1.5 degrees from the recently discovered Bo{\\"o}tes dwarf. The overdensity was detected well above statistical noise by employing a sophisticated data mining algorithm and does not correspond to any catalogued object. Overlaid isochrones using stellar population synthesis models show that the color-magnitude diagram of that region has the signature of an old (12 Gyr), metal-poor (${\\rm Fe/H}\\approx-2.0$) stellar population at a tentative distance of 60 kpc, evidently the same heliocentric distance as the Bo\\"otes dwarf. We estimate the new object to have a total magnitude of $M_{V}\\sim-3.1\\pm1.1$ mag and a half-light radius of $r_{h}=4'.1\\pm1'.6$ ($72\\pm28$ pc) placing it in an apparent $40Satellite, Coma Berenices.

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

    SciTech Connect (OSTI)

    Montgomery, James M.

    1992-04-01T23:59:59.000Z

    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. Autonomous, agile micro-satellites and supporting technologies

    SciTech Connect (OSTI)

    Breitfeller, E; Dittman, M D; Gaughan, R J; Jones, M S; Kordas, J F; Ledebuhr, A G; Ng, L C; Whitehead, J C; Wilson, B

    1999-07-19T23:59:59.000Z

    This paper updates the on-going effort at Lawrence Livermore National Laboratory to develop autonomous, agile micro-satellites (MicroSats). The objective of this development effort is to develop MicroSats weighing only a few tens of kilograms, that are able to autonomously perform precision maneuvers and can be used telerobotically in a variety of mission modes. The required capabilities include satellite rendezvous, inspection, proximity-operations, docking, and servicing. The MicroSat carries an integrated proximity-operations sensor-suite incorporating advanced avionics. A new self-pressurizing propulsion system utilizing a miniaturized pump and non-toxic mono-propellant hydrogen peroxide was successfully tested. This system can provide a nominal 25 kg MicroSat with 200-300 m/s delta-v including a warm-gas attitude control system. The avionics is based on the latest PowerPC processor using a CompactPCI bus architecture, which is modular, high-performance and processor-independent. This leverages commercial-off-the-shelf (COTS) technologies and minimizes the effects of future changes in processors. The MicroSat software development environment uses the Vx-Works real-time operating system (RTOS) that provides a rapid development environment for integration of new software modules, allowing early integration and test. We will summarize results of recent integrated ground flight testing of our latest non-toxic pumped propulsion MicroSat testbed vehicle operated on our unique dynamic air-rail.

  15. Improving the Representation of the Physical Atmosphere in Central California Using Satellite Data

    E-Print Network [OSTI]

    Jacob, Daniel J.

    constrained by observations. Moisture, Heat Capacity, Solar Radiation from Satellite Observations #12; EGHRImproving the Representation of the Physical Atmosphere in Central California Using Satellite Data/22/2006 8/23/2006 8/24/2006 Date Agreementindex(fraction) AI_cntrl AI_assim W0 #12;Central California

  16. Offshore wind resources from satellite SAR Charlotte Bay Hasager, Merete Bruun Christiansen, Morten Nielsen,

    E-Print Network [OSTI]

    Offshore wind resources from satellite SAR Charlotte Bay Hasager, Merete Bruun Christiansen, Morten ocean wind maps were described. For offshore wind resource estimation based on satellite observations and the near-coastal zone (up to 40 km offshore) is not mapped. In contrast, Envisat ASAR wind maps can

  17. Ground-level nitrogen dioxide concentrations inferred from the satellite-borne Ozone Monitoring Instrument

    E-Print Network [OSTI]

    Martin, Randall

    Ground-level nitrogen dioxide concentrations inferred from the satellite-borne Ozone Monitoring; published 28 August 2008. [1] We present an approach to infer ground-level nitrogen dioxide (NO2), Ground-level nitrogen dioxide concentrations inferred from the satellite-borne Ozone Monitoring

  18. Assimilation of satellite images into a sediment transport model of Lake Michigan

    E-Print Network [OSTI]

    Stroud, Jonathan

    by combining the satellite data with the numerical model. In our application, we find that data assimilationAssimilation of satellite images into a sediment transport model of Lake Michigan Jonathan R consider two data assimilation methods, direct insertion and a kriging-based approach, and perform

  19. New methods for estimating poleward eddy heat transport using satellite altimetry

    E-Print Network [OSTI]

    Majda, Andrew J.

    eddy-permitting ocean models (Jayne and Marotzke 2002) and data-assimilation products (Volkov et alNew methods for estimating poleward eddy heat transport using satellite altimetry Shane R. Keating eddy heat transport using satellite altimetry are severely limited by the sparseness

  20. Development of an Electrostatic Energy Analyzer (ESA) for the EQUARS Scientific Satellite

    E-Print Network [OSTI]

    Development of an Electrostatic Energy Analyzer (ESA) for the EQUARS Scientific Satellite R. S of an electrostatic energy analyzer to be launched onboard the EQUARS Scientific Satellite. The instrument of scientific instrument: ESA: Electrostatic Energy Analyzer 2. Physical parameters to be measured: Electron

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

    E-Print Network [OSTI]

    Guichard, Francoise

    Observational Datasets We use two different satellite soil moisture datasets, one derived from of the datasets. Whilst the AMSRE soil moisture product is gridded at 0.25°, the footprint of the sensor different precipitation datasets which use a combination of satellite data and, in some cases, surface

  2. Diurnal cycle of land surface temperature in a desert encroachment zone as observed from satellites

    E-Print Network [OSTI]

    Sun, Donglian

    Very High Resolution Radiometer (AVHRR) that are limited in their ability to capture the full diurnal) project and the Department of Energy's Atmospheric Radiation Measurement (ARM) program, the ARM Mobile of the surface from satellites are possible. Infrared radiometers on polar orbiting satellites have been used

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

    E-Print Network [OSTI]

    Masunaga, Hirohiko

    radiometer and scatterometer aboard different platforms. Satellite measurements of atmospheric parameters of moisture and dry static energy and their vertical flux at cloud base from satellite observations alone convergence for highly organized systems; 2) FT diabatic heating is largely offset on an instantaneous basis

  4. 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 project SATELLIGHT an attempt is made to use satellite methods to derive daylight and solar irradiance). In daylighting applications, knowledge of the lumi- nance distribution of the sky is of primary concern. Thus

  5. Wind resources and wind farm wake effects offshore observed from satellite

    E-Print Network [OSTI]

    Wind resources and wind farm wake effects offshore observed from satellite Charlotte Bay Hasager, Wind Energy Department, Roskilde, Denmark Charlotte.hasager@risoe.dk, poul.astrup@risoe.dk, merete.bruun.Christiansen@risoe.dk, morten.Nielsen@risoe.dk, r.barthelmie@risoe.dk Abstract: Satellite observations of ocean wind speed

  6. Dual attitude and parameter estimation of passively magnetically stabilized nano satellites$

    E-Print Network [OSTI]

    satellite using few, small sensors. A candidate minimal sensor set would be the spacecraft's own solar attitude sensors, a result of having small budgets for mass and power. Attitude determination can still be performed on a nano satellite with low fidelity sensors, but an accurate model of the spacecraft attitude

  7. Sea surface exchanges of momentum, heat, and freshwater determined by satellite remote sensing

    E-Print Network [OSTI]

    Yu, Lisan

    1 Sea surface exchanges of momentum, heat, and freshwater determined by satellite remote sensing Freshwater flux Latent heat flux Longwave radiation Satellite remote sensing Sea surface flux estimation Sensible heat flux Shortwave radiation Surface wind fields 2 #12;Sea surface exchanges of momentum, heat

  8. 2007 Urban Remote Sensing Joint Event Application of satellite Remote Sensing for Urban

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2007 Urban Remote Sensing Joint Event Application of satellite Remote Sensing for Urban Risk Analysis: a case study of the 2003 extreme heat wave in Paris Bénédicte Dousset Hawaii Institute@ogs.trieste.it Abstract ­ Satellite observations are used to monitor the August 2003 heat wave in Paris

  9. ACM-enabled satellite triple play over DVB-S2: A techno-economic study

    E-Print Network [OSTI]

    1 ACM-enabled satellite triple play over DVB-S2: A techno-economic study N. Anastasiadou1 , G looks at the techno-economic perspectives of the use of DVB-S2 and its unique feature, Adaptive Coding and Modulation (ACM) in the provision of satellite triple play. For this study, current market economic data were

  10. Geosemble Combines Satellite Views With Data By BOOYEON LEE -10/29/2007

    E-Print Network [OSTI]

    Valero-Cuevas, Francisco

    Security. In recent months, the company has received grants from the National Science Foundation, DefenseGeosemble Combines Satellite Views With Data Resources By BOOYEON LEE - 10/29/2007 Los Angeles Business Journal Staff Thanks to Google Maps you can zoom onto a satellite image of just about any office

  11. Ship Detection in Satellite Imagery Using Rank-Order Grayscale Hit-or-Miss Transforms

    E-Print Network [OSTI]

    Theiler, James

    Ship Detection in Satellite Imagery Using Rank-Order Grayscale Hit-or-Miss Transforms Neal R. Harvey*, Reid Porter, James Theiler Space & Remote Sensing Sciences Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA ABSTRACT Ship detection from satellite imagery is something that has great

  12. Estimating Sea Surface Temperature From Infrared Satellite and In Situ Temperature Data

    E-Print Network [OSTI]

    the exchanges of heat, momentum and gases between the ocean and the atmosphere. As the most widely observed variable in oceanography, SST is used in many different studies of the ocean and its coupling to adjust the satellite SSTs to match a selection of buoy SSTs. This forces the satellite skin SSTs

  13. ASES Proc. Solar 2010, Phoenix, AZ HIGH PERFORMANCE MSG SATELLITE MODEL FOR OPERATIONAL

    E-Print Network [OSTI]

    Perez, Richard R.

    terrain affects exploitation of solar energy. In this article we present innovative features of MSG area of interest, which extends from North Europe to North Africa. The satellite data calibration© ASES ­ Proc. Solar 2010, Phoenix, AZ HIGH PERFORMANCE MSG SATELLITE MODEL FOR OPERATIONAL SOLAR

  14. CROSS VALIDATION OF SATELLITE RADIATION TRANSFER MODELS DURING SWERA PROJECT IN BRAZIL

    E-Print Network [OSTI]

    Heinemann, Detlev

    of the Solar and Wind Energy Resource Assessment (SWERA) project. SWERA is a multinational project financed by UNEP-GEF aimed at performing a detailed survey of solar and wind energy resources of various developing satellite data and climatological information; (2) SUNY-Albany model: a statistical satellite method based

  15. Evaluation of satellite and reanalysis products of downward surface solar radiation over East Asia: Spatial and

    E-Print Network [OSTI]

    Dai, Aiguo

    Evaluation of satellite and reanalysis products of downward surface solar radiation over East Asia Received 29 July 2012; revised 27 February 2013; accepted 18 March 2013. [1] Surface solar radiation plays hydrological models. In this study, the downward surface solar radiation (DSSR) from two satellite products

  16. CONSTRAINTS ON OH MEGAMASER EXCITATION FROM A SURVEY OF OH SATELLITE LINES

    SciTech Connect (OSTI)

    McBride, James; Heiles, Carl [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); Elitzur, Moshe, E-mail: jmcbride@astro.berkeley.edu [Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506-0055 (United States)

    2013-09-01T23:59:59.000Z

    We report the results of a full-Stokes survey of all four 18 cm OH lines in 77 OH megamasers (OHMs) using the Arecibo Observatory. This is the first survey of OHMs that included observations of the OH satellite lines; only four of the 77 OHMs have existing satellite line observations in the literature. Satellite line emission is detected in five sources, three of which are redetections of previously published sources. The two sources with new detections of satellite line emission are IRAS F10173+0829, which was detected at 1720 MHz, and IRAS F15107+0724, for which both the 1612 MHz and 1720 MHz lines were detected. In IRAS F15107+0724, the satellite lines are partially conjugate, as 1720 MHz absorption and 1612 MHz emission have the same structure at some velocities within the source, along with additional broader 1612 MHz emission. This is the first observed example of conjugate satellite lines in an OHM. In the remaining sources, no satellite line emission is observed. The detections and upper limits are generally consistent with models of OHM emission in which all of the 18 cm OH lines have the same excitation temperature. There is no evidence for a significant population of strong satellite line emitters among OHMs.

  17. 18 Use of Satellite Remote Sensing Data for Modeling Carbon Emissions from Fires: A Perspective in

    E-Print Network [OSTI]

    Li, Zhanqing

    18 Use of Satellite Remote Sensing Data for Modeling Carbon Emissions from Fires: A Perspective of the accurate estimation of carbon emissions from fires. So far, the continental-scale estimates of carbon conventional and satellite data to maximize their utility for fire emission estimation. 18.2 Carbon Emission

  18. DEM GENERATION FROM ASTER SATELLITE DATA FOR GEOMORPHOMETRIC ANALYSIS OF CERRO SILLAJHUAY, CHILE/BOLIVIA

    E-Print Network [OSTI]

    Bolch, Tobias

    DEM GENERATION FROM ASTER SATELLITE DATA FOR GEOMORPHOMETRIC ANALYSIS OF CERRO SILLAJHUAY, CHILE/BOLIVIA, a volcano in the Andes of Chile/Bolivia, was developed from ASTER (Advanced Spaceborne Thermal Emission ASTER satellite data of the Cerro Sillajhuay in the Andes of Chile/Bolivia. Fieldwork at the Cerro

  19. Evaluation of Ad-Hoc and Mobility Architectures using Satellite Communications

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , terminal, session, network) or its "range" (micro- mobility/macro-mobility). In terrestrial networks be done using ad-hoc networks principle, but the communications from one group to another can be compared to the interconnection of ad- hoc networks. We propose in this paper to interconnect these terrestrial ad-hoc networks

  20. E-Print Network 3.0 - area network performance Sample Search...

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

    networks - network performance modeling - wireless networks - wireless sensor networks - ad hoc ... Source: Iowa State University, Office of Biorenewables Programs Collection:...

  1. Network Maps

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas Conchas recoveryLaboratory | NationalJohn Cyber SecurityAlamos NationalNeil Network Traffic

  2. Network Policies

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas Conchas recoveryLaboratory | NationalJohn Cyber SecurityAlamos NationalNeil NetworkAcceptable

  3. 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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearchScheduled System BurstLong Term ScheduleProject HomeTheNetwork

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

    E-Print Network [OSTI]

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

    2008-01-01T23:59:59.000Z

    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...

  5. attractor neural network: Topics by E-print Network

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

    Convolutional Neural Networks 5 Mixture of density networks Englebienne, Gwenn 138 Fuzzy neural network pattern recognition algorithm for classification of the events in...

  6. analog neural network: Topics by E-print Network

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

    Convolutional Neural Networks 5 Mixture of density networks Englebienne, Gwenn 118 Fuzzy neural network pattern recognition algorithm for classification of the events in...

  7. attractor neural networks: Topics by E-print Network

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

    Convolutional Neural Networks 5 Mixture of density networks Englebienne, Gwenn 138 Fuzzy neural network pattern recognition algorithm for classification of the events in...

  8. algebraic network coding: Topics by E-print Network

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

    and robust networking. For networks which are restricted to using linear network codes, we find necessary and sufficient conditions for the feasibility of any given set of...

  9. Extracting cosmic microwave background polarisation from satellite astrophysical maps

    E-Print Network [OSTI]

    Baccigalupi, C; De Zotti, G; Smoot, G F; Burigana, C; Maino, D; Bedini, L; Salerno, E

    2002-01-01T23:59:59.000Z

    We present the application of the Fast Independent Component Analysis technique for blind component separation to polarised astrophysical emission. We study how the Cosmic Microwave Background (CMB) polarised signal, consisting of $E$ and $B$ modes, can be extracted from maps affected by substantial contamination from diffuse Galactic foregrounds and instrumental noise. We perform the analysis of all sky maps simulated accordingly to the nominal performances of the Low Frequency Instrument (LFI) aboard the Planck satellite; the sky signal is modeled as a superposition of CMB, generated by a Gaussian, nearly scale invariant cosmological perturbation spectrum, and the existing simulated polarisation templates of Galactic synchrotron. Our results indicate that the angular power spectrum of CMB $E$ modes can be recovered on all scales up to $\\ell\\simeq 1000$, corresponding to the fourth acoustic oscillation, while $B$ modes can be detected, up to their turnover at $\\ell\\simeq 100$ if cosmological tensor amplitude...

  10. Wave-climate assessment by satellite remote sensing

    SciTech Connect (OSTI)

    Barstow, S.; Krogstad, H.E. [SINTEF, Trodheim (Norway)

    1995-10-01T23:59:59.000Z

    Satellite remote sensing based on radar altimetry and the synthetic aperture radar (SAR) can be used for accurate ocean-wave climatology globally. The altimeter provides significant wave height and wind speed whereas SAR in principle gives the full wave spectrum. Over the next few years, altimeter-derived wave heights will become the basic data sources for open-ocean statistics and SAR, in combination with results from global wave models, will provide the corresponding directional statistics. In addition, SAR may be used for studying wave conditions in near coastal areas. In the Norwegian Sea and elsewhere, real-time SAT and altimeter data are now being used operationally for forecasting and assimilation into numerical wave models.

  11. A Faint New Milky Way Satellite in Bootes

    E-Print Network [OSTI]

    V. Belokurov; D. B. Zucker; N. W. Evans; M. I. Wilkinson; M. J. Irwin; S. Hodgkin; D. M. Bramich; J. M. Irwin; G. Gilmore; B. Willman; S. Vidrih; H. J. Newberg; R. F. G. Wyse; M. Fellhauer; P. C. Hewett; N. Cole; E. F. Bell; T. C. Beers; C. M. Rockosi; B. Yanny; E. K. Grebel; D. P. Schneider; R. Lupton; J. C. Barentine; H. Brewington; J. Brinkmann; M. Harvanek; S. J. Kleinman; J. Krzesinski; D. Long; A. Nitta; J. A. Smith; S. A. Snedden

    2006-04-17T23:59:59.000Z

    In this Letter, we announce the discovery of a new satellite of the Milky Way in the constellation of Bootes at a distance of 60 kpc. It was found in a systematic search for stellar overdensities in the North Galactic Cap using Sloan Digital Sky Survey Data Release 5 (SDSS DR5). The color-magnitude diagram shows a well-defined turn-off, red giant branch, and extended horizontal branch. Its absolute magnitude is -5.8, which makes it one of the faintest galaxies known. The half-light radius is 220 pc. The isodensity contours are elongated and have an irregular shape, suggesting that Boo may be a disrupted dwarf spheroidal galaxy.

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

    SciTech Connect (OSTI)

    Beckerman, M.; Jones, J.P.

    1999-02-01T23:59:59.000Z

    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.

  13. FES Science Network Requirements

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    FES Science Network Requirements Report of the Fusion Energy Sciences Network Requirements Workshop Conducted March 13 and 14, 2008 #12;FES Science Network Requirements Workshop Fusion Energy Sciences Program Office, DOE Office of Science Energy Sciences Network Gaithersburg, MD ­ March 13 and 14, 2008 ESnet

  14. Professional Networking Michelle Burdick

    E-Print Network [OSTI]

    Awtar, Shorya

    Development Green Sustainability Professionals #12;How To Use LinkedIn Groups Group Discussions: ­ Members can Environmental Careers Network GIS Professional & Networking Green Jobs & Career Network Sustainable EnergyLinkedIn Professional Networking Workshop Michelle Burdick 24 January 2014 #12;· Building a Strong

  15. Networks, Information & Social Capital

    E-Print Network [OSTI]

    Aral, Sinan

    2008-01-26T23:59:59.000Z

    This paper investigates how information flows enable social networks to constitute social capital. By analyzing

  16. Use of open source information and commercial satellite imagery for nuclear nonproliferation regime compliance verification by a community of academics

    E-Print Network [OSTI]

    Solodov, Alexander

    2009-06-02T23:59:59.000Z

    . In this study, the availability and use of commercial satellite imagery systems, commercial computer codes for satellite imagery analysis, Comprehensive Test Ban Treaty (CTBT)verification International Monitoring System (IMS), publicly available information...

  17. 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

    2005-01-01T23:59:59.000Z

    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 ...

  18. Survivability Considerations in Wireless Networks

    E-Print Network [OSTI]

    Ning, Jianxia

    2012-01-01T23:59:59.000Z

    pre-configured by the network administrator, otherwise thedetermined by the network administrator according to if thebut also allow a network administrator to determine the

  19. Characterization of network traffic on a local area network

    E-Print Network [OSTI]

    Suravarapu, Prasad Devi

    1995-01-01T23:59:59.000Z

    all of these concerns. The data. for this analysis was collected mostly off of a SparcServer 1000. con- figured with an Am7990 (LANCE) Ethernet device driver and a SCSI disk drive. This machine was equipped with a micro-second timer with a...

  20. The assimilation of satellite-derived data into a one-dimensional lower trophic level marine ecosystem model

    E-Print Network [OSTI]

    Latour, Robert J.

    The assimilation of satellite-derived data into a one-dimensional lower trophic level marine, Virginia 23062-1346. Email: marjy@vims.edu #12; 2 The assimilation of satellite-derived data of experiments assimilating synthetic and actual satellite-derived data, including total chlorophyll, size

  1. E-Print Network 3.0 - advanced general purpose Sample Search...

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

    Sciences and Ecology 18 Advanced Acceleration Solutions for Next Generation Datacenter Servers Summary: , programmable engines, co- processors and dedicated...

  2. afirmaciones con pretensiones: Topics by E-print Network

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

    Server, basato su SQL, multi-processo, multi Goy, Anna 28 ORNLCON-462 Methodology for Energy Storage, Conversion and Utilization Websites Summary: ORNLCON-462 Methodology for...

  3. alimentados con dietas: Topics by E-print Network

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

    Server, basato su SQL, multi-processo, multi Goy, Anna 28 ORNLCON-462 Methodology for Energy Storage, Conversion and Utilization Websites Summary: ORNLCON-462 Methodology for...

  4. alimentado con dietas: Topics by E-print Network

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

    Server, basato su SQL, multi-processo, multi Goy, Anna 28 ORNLCON-462 Methodology for Energy Storage, Conversion and Utilization Websites Summary: ORNLCON-462 Methodology for...

  5. Network Performance of a Video Application in the Cloud.

    E-Print Network [OSTI]

    NARISETTY, SHRAVAN

    2012-01-01T23:59:59.000Z

    ??Cloud computing is a technology that uses the internet and central remote servers to maintain data and applications. There are different cloud services of which… (more)

  6. attaching client processors: Topics by E-print Network

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

    sharing, sojourn times, MDP I. INTRODUCTION Dispatching problems arise in many, e.g., web servers are better modelled as processor sharing (PS) queues, where several...

  7. Solving stochasic PERT networks exactly using hybrid Bayesian networks

    E-Print Network [OSTI]

    Cinicioglu, Esma N.; Shenoy, Prakash P.

    2006-09-16T23:59:59.000Z

    In this paper, we describe how a stochastic PERT network can be formulated as a Bayesian network. We approximate such PERT Bayesian network by mixtures of Gaussians hybrid Bayesian networks. Since there exists algorithms for solving mixtures...

  8. Networking Call for Residential Network Members Peer Exchange...

    Office of Environmental Management (EM)

    Networking Call for Residential Network Members Peer Exchange Call Networking Call for Residential Network Members Peer Exchange Call March 12, 2015 12:30PM to 2:00PM EDT...

  9. Building a Network Simulation Model of the Teragrid Network

    E-Print Network [OSTI]

    Jiang, Wen

    Building a Network Simulation Model of the Teragrid Network Thomas Hacker Preston Smith* Computer in designing and using an accurate network simulation model of the Teragrid network, and the performance

  10. Storageflow: An SDN Approach to Storage Networks

    E-Print Network [OSTI]

    Bose, Pradipta

    2014-08-04T23:59:59.000Z

    to perform encoding operations on select flows upon the request from the controller. Our approach utilizes commodity hardware, which makes it cost-efficient and attractive. In contrast to the traditional approaches which rely on dedicated servers to perform...

  11. Semantic Routed Network for Distributed Search Engines

    E-Print Network [OSTI]

    Biswas, Amitava

    2011-08-08T23:59:59.000Z

    to compare composite meanings for superior search quality. In distributed search engines, for scalability, speed and efficiency, index entries should be systematically distributed across multiple index-server nodes based on the meaning of the objects...

  12. analysis network sevan: Topics by E-print Network

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

    Francesco Keywords: Knowledge Base, Social Network Analysis, Variety, Coherence, Industry lifecycles; exploration network analysis (SNA) within an evolutionary framework, to...

  13. Interconnection networks

    DOE Patents [OSTI]

    Faber, V.; Moore, J.W.

    1988-06-20T23:59:59.000Z

    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.

  14. Reliability Gain of Network Coding in Lossy Wireless Networks

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Reliability Gain of Network Coding in Lossy Wireless Networks Majid Ghaderi Department of Computer that network coding improves network reliability by reducing the number of packet retransmissions in lossy networks. However, the extent of the reliability benefit of network coding is not known. This paper

  15. Formalism and quality of a proper motion link with extragalactic objects for astrometric satellite missions

    E-Print Network [OSTI]

    M. Metz; M. Geffert

    2003-09-29T23:59:59.000Z

    The accuracy of the link of the proper motion system of astrometric satellite missions like AMEX and GAIA is discussed. Monte-Carlo methods were used to simulate catalogues of positions and proper motions of quasars and galaxies to test the link. The main conclusion is, that future satellite missions like GAIA may be ``self-calibrated'' by their measurements of QSOs, while additional measurements from radio stars or HST-data are needed to calibrate the less deep reaching astrometric satellite missions of AMEX type.

  16. Using Batteries to Reduce the Power Costs of Internet-scale Distributed

    E-Print Network [OSTI]

    Berger, Emery

    Cost of Running an Internet-Scale Network 4 Server Cost (CapEx) Bandwidth From network provider Example

  17. Extracting cosmic microwave background polarisation from satellite astrophysical maps

    E-Print Network [OSTI]

    C. Baccigalupi; F. Perrotta; G. De Zotti; G. F. Smoot; C. Burigana; D. Maino; L. Bedini; E. Salerno

    2004-07-12T23:59:59.000Z

    We present the application of the Fast Independent Component Analysis ({\\ica}) technique for blind component separation to polarized astrophysical emission. We study how the Cosmic Microwave Background (CMB) polarized signal, consisting of $E$ and $B$ modes, can be extracted from maps affected by substantial contamination from diffuse Galactic foreground emission and instrumental noise. {We implement Monte Carlo chains varying the CMB and noise realizations in order to asses the average capabilities of the algorithm and their variance.} We perform the analysis of all sky maps simulated according to the {\\sc Planck} satellite capabilities, modelling the sky signal as a superposition of the CMB and of the existing simulated polarization templates of Galactic synchrotron. Our results indicate that the angular power spectrum of CMB $E$-mode can be recovered on all scales up to $\\ell\\simeq 1000$, corresponding to the fourth acoustic oscillation, while the $B$-mode power spectrum can be detected, up to its turnover at $\\ell\\simeq 100$, if the ratio of tensor to scalar contributions to the temperature quadrupole exceeds 30%. The power spectrum of the cross correlation between total intensity and polarization, $TE$, can be recovered up to $\\ell\\simeq 1200$, corresponding to the seventh $TE$ acoustic oscillation.

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

    SciTech Connect (OSTI)

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

    1980-01-01T23:59:59.000Z

    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)

  19. WIND ENERGY STUDIES OFFSHORE USING SATELLITE REMOTE SENSING MERETE BRUUN CHRISTIANSEN

    E-Print Network [OSTI]

    1 WIND ENERGY STUDIES OFFSHORE USING SATELLITE REMOTE SENSING MERETE BRUUN CHRISTIANSEN Wind Energy sensing; the method can be extended to a mapping of wind resources. Further, effects of a large offshore

  20. Construction of an Electrostatic Energy Analyzer for the EQUARS Scientific Satellite

    E-Print Network [OSTI]

    Construction of an Electrostatic Energy Analyzer for the EQUARS Scientific Satellite The ELISAScientific Objectives Electron Precipitation in the South Atlantic Magnetic Anomaly Electrons with E with IONEX project (fluctuations) The Electrostatic Energy AnalyzerThe Electrostatic Energy Analyzer rext