National Library of Energy BETA

Sample records for distribution network including

  1. Communication in automation, including networking and wireless

    E-Print Network [OSTI]

    Antsaklis, Panos

    Communication in automation, including networking and wireless Nicholas Kottenstette and Panos J and networking in automation is given. Digital communication fundamentals are reviewed and networked control are presented. 1 Introduction 1.1 Why communication is necessary in automated systems Automated systems use

  2. Network aware distributed applications

    SciTech Connect (OSTI)

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

    2001-02-04

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

  3. Distributed downhole drilling network

    DOE Patents [OSTI]

    Hall, David R.; Hall, Jr., H. Tracy; Fox, Joe; Pixton, David S.

    2006-11-21

    A high-speed downhole network providing real-time data from downhole components of a drilling strings includes a bottom-hole node interfacing to a bottom-hole assembly located proximate the bottom end of a drill string. A top-hole node is connected proximate the top end of the drill string. One or several intermediate nodes are located along the drill string between the bottom-hole node and the top-hole node. The intermediate nodes are configured to receive and transmit data packets transmitted between the bottom-hole node and the top-hole node. A communications link, integrated into the drill string, is used to operably connect the bottom-hole node, the intermediate nodes, and the top-hole node. In selected embodiments, a personal or other computer may be connected to the top-hole node, to analyze data received from the intermediate and bottom-hole nodes.

  4. Sensor Networks: Distributed Algorithms Reloaded or Revolutions?

    E-Print Network [OSTI]

    Sensor Networks: Distributed Algorithms Reloaded ­ or Revolutions? Roger Wattenhofer Computer. This paper wants to motivate the distributed algorithms community to study sensor networks. We discuss why community, a sensor network essentially is ­ a database. The distributed algorithms community should join

  5. Entanglement Distribution in Optical Networks

    E-Print Network [OSTI]

    Alex Ciurana; Vicente Martin; Jesus Martinez-Mateo; Bernhard Schrenk; Momtchil Peev; Andreas Poppe

    2014-09-21

    The ability to generate entangled photon-pairs over a broad wavelength range opens the door to the simultaneous distribution of entanglement to multiple users in a network by using centralized sources and flexible wavelength-division multiplexing schemes. Here we show the design of a metropolitan optical network consisting of tree-type access networks whereby entangled photon-pairs are distributed to any pair of users, independent of their location. The network is constructed employing commercial off-the-shelf components and uses the existing infrastructure, which allows for moderate deployment costs. We further develop a channel plan and a network-architecture design to provide a direct optical path between any pair of users, thus allowing classical and one-way quantum communication as well as entanglement distribution. This allows the simultaneous operation of multiple quantum information technologies. Finally, we present a more flexible backbone architecture that pushes away the load limitations of the original network design by extending its reach, number of users and capabilities.

  6. Consistency of Posterior Distributions for Neural Networks

    E-Print Network [OSTI]

    Consistency of Posterior Distributions for Neural Networks Herbert Lee \\Lambda May 21, 1998 Abstract In this paper we show that the posterior distribution for feedforward neural networks is asymp neural networks for nonparametric regression in a Bayesian framework. Keywords: Bayesian statistics

  7. Distributed Connectivity of Wireless Networks

    E-Print Network [OSTI]

    Halldorsson, Magnus M

    2012-01-01

    We consider the problem of constructing a communication infrastructure from scratch, for a collection of identical wireless nodes. Combinatorially, this means a) finding a set of links that form a strongly connected spanning graph on a set of $n$ points in the plane, and b) scheduling it efficiently in the SINR model of interference. The nodes must converge on a solution in a distributed manner, having no means of communication beyond the sole wireless channel. We give distributed connectivity algorithms that run in time $O(poly(\\log \\Delta, \\log n))$, where $\\Delta$ is the ratio between the longest and shortest distances among nodes. Given that algorithm without prior knowledge of the instance are essentially limited to using uniform power, this is close to best possible. Our primary aim, however, is to find efficient structures, measured in the number of slots used in the final schedule of the links. Our main result is algorithms that match the efficiency of centralized solutions. Specifically, the networks...

  8. Optimal Distributed Voltage Regulation in Power Distribution Networks

    E-Print Network [OSTI]

    Lam, Albert Y S; Dominguez-Garcia, Alejandro; Tse, David

    2012-01-01

    In this paper, we address the problem of voltage regulation in power distribution networks with deep-penetration of distributed energy resources (DERs), e.g., renewable-based generation, and storage-capable loads such as plug-in hybrid electric vehicles. We cast the problem as an optimization program, where the objective is to minimize the losses in the network subject to constraints on bus voltage magnitudes, limits on active and reactive power injections, transmission line thermal limits and losses. We provide sufficient conditions under which the optimization problem can be solved via its convex relaxation. Using data from existing networks, we show that the conditions are expected to be satisfied by most networks. We also provide an efficient distributed algorithm to solve the problem. The algorithm is asynchronous, with a communication topology that is the same as the electrical network topology. We illustrate the algorithm's performance in the IEEE 34-bus and the 123-bus feeder test systems.

  9. Resilient Networked Control of Distributed Energy Resources

    E-Print Network [OSTI]

    Hadjicostis, Christoforos

    of algorithms to the problem of coordinating distributed energy resources (DERs) for service provision to them as distributed energy resources (DERs)] provides more flexibility in the provision of ancillary1 Resilient Networked Control of Distributed Energy Resources Alejandro D. Dominguez-Garcia, Member

  10. Innovation flow through social networks: Productivity distribution

    E-Print Network [OSTI]

    T. Di Matteo; T. Aste; M. Gallegati

    2004-06-19

    A detailed empirical analysis of the productivity of non financial firms across several countries and years shows that productivity follows a non-Gaussian distribution with power law tails. We demonstrate that these empirical findings can be interpreted as consequence of a mechanism of exchanges in a social network where firms improve their productivity by direct innovation or/and by imitation of other firm's technological and organizational solutions. The type of network-connectivity determines how fast and how efficiently information can diffuse and how quickly innovation will permeate or behaviors will be imitated. From a model for innovation flow through a complex network we obtain that the expectation values of the productivity level are proportional to the connectivity of the network of links between firms. The comparison with the empirical distributions reveals that such a network must be of a scale-free type with a power-law degree distribution in the large connectivity range.

  11. Voltage Management of Networks with Distributed Generation. 

    E-Print Network [OSTI]

    O'Donnell, James

    2008-01-01

    At present there is much debate about the impacts and benefits of increasing the amount of generation connected to the low voltage areas of the electricity distribution network. The UK government is under political ...

  12. C -parameter distribution at N 3 LL ' including power corrections

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

    Hoang, André H.; Kolodrubetz, Daniel W.; Mateu, Vicent; Stewart, Iain W.

    2015-05-01

    We compute the e?e? C-parameter distribution using the soft-collinear effective theory with a resummation to next-to-next-to-next-to-leading-log prime accuracy of the most singular partonic terms. This includes the known fixed-order QCD results up to O(?3s), a numerical determination of the two-loop nonlogarithmic term of the soft function, and all logarithmic terms in the jet and soft functions up to three loops. Our result holds for C in the peak, tail, and far tail regions. Additionally, we treat hadronization effects using a field theoretic nonperturbative soft function, with moments ?n. To eliminate an O(?QCD) renormalon ambiguity in the soft function, we switchmore »from the MS¯ to a short distance “Rgap” scheme to define the leading power correction parameter ?1. We show how to simultaneously account for running effects in ?1 due to renormalon subtractions and hadron-mass effects, enabling power correction universality between C-parameter and thrust to be tested in our setup. We discuss in detail the impact of resummation and renormalon subtractions on the convergence. In the relevant fit region for ?s(mZ) and ?1, the perturbative uncertainty in our cross section is ? 2.5% at Q=mZ.« less

  13. C -parameter distribution at N 3 LL ' including power corrections

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

    Hoang, André H.; Kolodrubetz, Daniel W.; Mateu, Vicent; Stewart, Iain W.

    2015-05-01

    We compute the e?e? C-parameter distribution using the soft-collinear effective theory with a resummation to next-to-next-to-next-to-leading-log prime accuracy of the most singular partonic terms. This includes the known fixed-order QCD results up to O(?3s), a numerical determination of the two-loop nonlogarithmic term of the soft function, and all logarithmic terms in the jet and soft functions up to three loops. Our result holds for C in the peak, tail, and far tail regions. Additionally, we treat hadronization effects using a field theoretic nonperturbative soft function, with moments ?n. To eliminate an O(?QCD) renormalon ambiguity in the soft function, we switch from the MS¯ to a short distance “Rgap” scheme to define the leading power correction parameter ?1. We show how to simultaneously account for running effects in ?1 due to renormalon subtractions and hadron-mass effects, enabling power correction universality between C-parameter and thrust to be tested in our setup. We discuss in detail the impact of resummation and renormalon subtractions on the convergence. In the relevant fit region for ?s(mZ) and ?1, the perturbative uncertainty in our cross section is ? 2.5% at Q=mZ.

  14. Neural network approach to parton distributions fitting

    E-Print Network [OSTI]

    Andrea Piccione; Joan Rojo; for the NNPDF Collaboration

    2005-10-18

    We will show an application of neural networks to extract information on the structure of hadrons. A Monte Carlo over experimental data is performed to correctly reproduce data errors and correlations. A neural network is then trained on each Monte Carlo replica via a genetic algorithm. Results on the proton and deuteron structure functions, and on the nonsinglet parton distribution will be shown.

  15. Properties of real networks: degree distribution

    E-Print Network [OSTI]

    Albert, Réka

    Properties of real networks: degree distribution Nodes with small degrees are most frequent of functions and not degree distributions 10 10 0 10 1 10 2 10 3 -4 10 -3 10 -2 10 -1 10 0 loglog .5 1 1 cx)x(f x c)x(f 50. cx)x(f #12;In- and out-degree distribution of the WWW 12 452 . . )( )( kkP kk

  16. Hierarchical Wireless Network Architecture for Distributed Applications Zeashan Hameed Khan

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Hierarchical Wireless Network Architecture for Distributed Applications Zeashan Hameed Khan Control-- This paper describes a hierarchical wireless network architecture for real time remote coordination, Distributed monitoring, QoS adaptation, Realtime coordination I. INTRODUCTION Wireless communication networks

  17. Proportional Integral Distributed Optimization for Dynamic Network Topologies

    E-Print Network [OSTI]

    Egerstedt, Magnus

    Proportional Integral Distributed Optimization for Dynamic Network Topologies Greg Droge, Magnus Egerstedt Abstract--This paper investigates proportional-integral distributed optimization when the underlying informa- tion exchange network is dynamic. Proportional-integral distributed optimization

  18. Modeling Microbial Consortiums as Distributed Metabolic Networks

    E-Print Network [OSTI]

    Vallino, Joseph J.

    Modeling Microbial Consortiums as Distributed Metabolic Networks JOSEPH J. VALLINO Ecosystems living systems in combination with abiotic reactions process and cycle mass and energy on local, regional by microbial processes, and it appears to closely follow thermodynamic constraints in that electron acceptor (O

  19. Energy Balanced Chain in Distributed Sensor Networks

    E-Print Network [OSTI]

    Howitt, Ivan

    Energy Balanced Chain in Distributed Sensor Networks Ivan Howitt Electrical & Computer Engineering because of their higher traffic. This paper suggests an energy balanced chain (EBC) which can efficiently the energy balance optimization problem in terms of the segmentation space. By adjusting the transmission

  20. Voltage Control of Distribution Networks with Distributed Generation using Reactive Power

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    , photovoltaics, and synchronous generators. I. INTRODUCTION Penetration of DG into distribution network in terms of voltage profile improvement, line-loss reduction, and environmental impact reductionVoltage Control of Distribution Networks with Distributed Generation using Reactive Power

  1. Efficient Sensor Placement Optimization for Securing Large Water Distribution Networks

    E-Print Network [OSTI]

    Pratt, Vaughan

    Efficient Sensor Placement Optimization for Securing Large Water Distribution Networks Andreas Abstract: The problem of deploying sensors in a large water distribution network is considered, in order water--exhibits an important diminishing returns effect called submodularity. The submodularity

  2. GDMN : An Information Management Network for Distributed Systems

    E-Print Network [OSTI]

    Sengupta, Raja

    GDMN : An Information Management Network for Distributed Systems Amit Mahajan {amahajan from the system. 1 Introduction There are many systems that produce and con- sume information at many sites distributed over large geographical areas. Battlefield networks, traffic management systems

  3. Aalborg Universitet Power Flow Analysis Algorithm for Islanded LV Microgrids Including Distributed

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Power Flow Analysis Algorithm for Islanded LV Microgrids Including Distributed., & Guerrero, J. M. (2014). Power Flow Analysis Algorithm for Islanded LV Microgrids Including Distributed.aau.dk on: juli 04, 2015 #12;Power Flow Analysis Algorithm for Islanded LV Microgrids Including Distributed

  4. Distributed Medium Access Control for Next Generation CDMA Wireless Networks

    E-Print Network [OSTI]

    Zhuang, Weihua

    Distributed Medium Access Control for Next Generation CDMA Wireless Networks Hai Jiang, Princeton wireless networks are expected to have a simple infrastructure with distributed control. In this article, we consider a generic distributed network model for future wireless multi- media communications

  5. Energy Scaling Laws for Distributed Inference in Random Fusion Networks

    E-Print Network [OSTI]

    Yukich, Joseph E.

    1 Energy Scaling Laws for Distributed Inference in Random Fusion Networks Animashree Anandkumar Abstract--The energy scaling laws of multihop data fusion networks for distributed inference are considered. The fusion network consists of randomly located sensors distributed i.i.d. according to a general spatial

  6. Distributed Boundary Estimation using Sensor Networks

    E-Print Network [OSTI]

    Ramamritham, Krithi

    where such boundaries need to be detected include monitoring the spread of toxic gases [1], oil spills in oceans [2], or even tracking storm cloud front. Oil companies are interested in deploying off-shore sensor networks to monitor the area where oil spills normally happen. The focus in these cases

  7. Distributed Control of Networked Dynamical Systems: Static Feedback,

    E-Print Network [OSTI]

    Dimarogonas, Dimos

    1 Distributed Control of Networked Dynamical Systems: Static Feedback, Integral Action--This paper analyzes distributed control protocols for first- and second-order networked dynamical systems. We systems. The PI controllers successfully attenuate constant disturbances in the network. We prove

  8. Distributed Mobility Management for Target Tracking in Mobile Sensor Networks

    E-Print Network [OSTI]

    Chakrabarty, Krishnendu

    --Wireless mobile sensor networks, mobility management, target tracking, Bayesian, distributed system. Ç 1 of scarce resources, such as energy and network bandwidth. Furthermore, the mobility management schemeDistributed Mobility Management for Target Tracking in Mobile Sensor Networks Yi Zou, Member, IEEE

  9. Energy Distribution Control in Wireless Sensor Networks Through Range Optimization

    E-Print Network [OSTI]

    Yanikoglu, Berrin

    Energy Distribution Control in Wireless Sensor Networks Through Range Optimization M.Sarper Gokturk--A major objective in wireless sensor networks is to find optimum routing strategies for energy efficient a location-based routing framework to control the energy distribution in a network where transmission ranges

  10. Distributed Energy-Efficient Hierarchical Clustering for Wireless Sensor Networks

    E-Print Network [OSTI]

    Holliday, JoAnne

    Distributed Energy-Efficient Hierarchical Clustering for Wireless Sensor Networks Ping Ding, Jo important. In this paper, we propose a distributed weight-based energy-efficient hierarchical clustering of the network topology. Younis and Fahmy [4] propose a Hybrid Energy-Efficient Distributed clustering (HEED

  11. Distributed shared memory multiprocessors using multistage bus networks 

    E-Print Network [OSTI]

    Iyer, Ravishankar

    1996-01-01

    Distributed shared memory (DSM) multiprocessors rely heavily on the interconnection network performance. The Multistage Bus Network (MBN) is analyzed in this thesis for a DSM environment. The MBN avoids some of the shortcomings of the conventional...

  12. Network coding for distributed quantum computation over cluster and butterfly networks

    E-Print Network [OSTI]

    Seiseki Akibue; Mio Murao

    2015-03-26

    To apply network coding for quantum computation, we study the distributed implementation of unitary operations over all separated input and output nodes of quantum networks. We consider a setting of networks where quantum communication between nodes is restricted to sending just a qubit, but classical communication is unrestricted. We analyze which N-qubit unitary operations are implementable over cluster networks by investigating transformations of a given cluster network into quantum circuits. We show that any two-qubit unitary operation is implementable over the butterfly network and the grail network, which are fundamental primitive networks for classical network coding. We also analyze probabilistic implementations of unitary operations over cluster networks.

  13. Sensor Networks for Monitoring and Control of Water Distribution Systems

    E-Print Network [OSTI]

    Whittle, Andrew

    Water distribution systems present a significant challenge for structural monitoring. They comprise a complex network of pipelines buried underground that are relatively inaccessible. Maintaining the integrity of these ...

  14. Greening the Networks of Large-Scale Distributed Systems

    E-Print Network [OSTI]

    Lefèvre, Laurent

    -tier fat-tree architecture Energy savings of Green compared to No off : - 73% for a 20% workload - 68Greening the Networks of Large-Scale Distributed Systems ENS de Lyon ­ INRIA RESO ­ UCBL ­ LIP://perso.ens-lyon.fr/annececile.orgerie/networks.html HERMES : High-level Energy-awaRe Model for bandwidth reservation in End-to-end NetworkS · Unused network

  15. Interconnecting PV on New York City's Secondary Network Distribution System

    SciTech Connect (OSTI)

    Anderson, K.; Coddington, M.; Burman, K.; Hayter, S.; Kroposki, B.; Watson, A.

    2009-12-01

    This study describes technical assistance provided by NREL to help New York City and Con Edison improve the interconnection of distributed PV systems on a secondary network distribution system.

  16. Power Flow Analysis Algorithm for Islanded LV Microgrids Including Distributed Generator Units with

    E-Print Network [OSTI]

    Chaudhary, Sanjay

    Power Flow Analysis Algorithm for Islanded LV Microgrids Including Distributed Generator Units power system. Being able to operate in both grid-connected and islanded mode, a microgrid manages and controls distributed energy resources, energy storage systems and loads, most of them are power electronic

  17. Universal Distribution of Saliencies for Pruning in Layered Neural Networks

    E-Print Network [OSTI]

    Lautrup, Benny

    Universal Distribution of Saliencies for Pruning in Layered Neural Networks J. Gorodkin y, L. K learning in layered neural networks is a two stage process. A choice of architecture leads to the implicit is implementable in a neural network representation.12 xPermanent address: Department of Physiology and Institute

  18. Brief Announcement: Distributed Churn Measurement in Arbitrary Networks

    E-Print Network [OSTI]

    Gramoli, Vincent

    Brief Announcement: Distributed Churn Measurement in Arbitrary Networks Vincent Gramoli EPFL & Univ; General Terms: Algorithms Keywords: Churn, Dynamics, Gossip, Large-Scale 1. INTRODUCTION & MODEL We adress the problem of estimating in a fully distributed way the dynamism over a network, called the churn. This BA

  19. A Differential Phase Shift Scheme for Quantum Key Distribution in Passive Optical Networks

    E-Print Network [OSTI]

    Michael Hentschel; Andreas Poppe; Bernhard Schrenk; Momtchil Peev; Edwin Querasser; Roland Lieger

    2014-12-19

    We propose a scheme for quantum key distribution (QKD) in a passive optical network (PON) based on differential phase shift (DPS) coding. A centralized station including all expensive components serves many users, making it suitable for a true multi-user network in a local environment with moderate distances on the order of a few kilometers. The emphasis lies on an asymmetric design for cost effective implementation of network end points.

  20. Synchronization of networks of oscillators with distributed delay coupling

    E-Print Network [OSTI]

    Y. N. Kyrychko; K. B. Blyuss; E. Schoell

    2014-10-27

    This paper studies the stability of synchronized states in networks where couplings between nodes are characterized by some distributed time delay, and develops a generalized master stability function approach. Using a generic example of Stuart-Landau oscillators, it is shown how the stability of synchronized solutions in networks with distributed delay coupling can be determined through a semi-analytic computation of Floquet exponents. The analysis of stability of fully synchronized and of cluster or splay states is illustrated for several practically important choices of delay distributions and network topologies.

  1. Networked Loads in the Distribution Grid

    E-Print Network [OSTI]

    Wang, Zhifang; Li, Xiao; Muthukumar, Vishak; Scaglione, Anna; Peisert, Sean; McParland, Chuck

    2012-01-01

    is structured according to the SCADA model. Although thea prototypical instance of SCADA network in the distributionservers that are part of a SCADA system, which has grown in

  2. Scalable Distributed Control of Network of DERs

    E-Print Network [OSTI]

    Engineering Caltech December 2012 #12;Large active network of DERs DER: PVs, wind turbines, batteries, EVs, DR Large active network of DERs DER: PVs, wind turbines, FACTS, EVs, batteries, DR loads #12;Outline But .... (caveat) #12;Watershed moment Bell: telephone 1876 Tesla: multi-phase AC 1888 Both started as natural

  3. Study of distributed Fair Scheduling in wireless local area networks 

    E-Print Network [OSTI]

    Gupta, Seema

    2000-01-01

    A Fair Scheduling policy is required to support differentiated QoS requirements of contending flows in a wireless channel. This thesis presents a study of the Distributed Fair Scheduling (DFS) algorithm proposed for wireless Local Area Networks...

  4. SMPL : a network architecture for collaborative distributed services

    E-Print Network [OSTI]

    Rocha, Carols A. (Carlos Andres Rocha Penagos)

    2005-01-01

    This thesis proposes a network architecture, called SMPL, for the design and development of collaboration-oriented, distributed applications over the Internet. The goal of SMPL is to enable the development of applications ...

  5. Detecting Disruptive Routers: A Distributed Network Monitoring Kirk A. Bradley

    E-Print Network [OSTI]

    Yoo, S. J. Ben

    Detecting Disruptive Routers: A Distributed Network Monitoring Approach Kirk A. Bradley Steven of this work in other works must be obtained from the IEEE. Kirk Bradley's current a liation is SRI

  6. Integrity and access control in untrusted content distribution networks

    E-Print Network [OSTI]

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

    2005-01-01

    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 ...

  7. Determining Vision Graphs for Distributed Camera Networks Using Feature Digests

    E-Print Network [OSTI]

    Radke, Rich

    1 Determining Vision Graphs for Distributed Camera Networks Using Feature Digests Zhaolin Cheng and the length of each feature descriptor are substantially reduced to form a fixed-length "feature digest" that is broadcast to the rest of the network. Each receiver camera decompresses the feature digest to recover

  8. Architecture of the Secoqc Quantum Key Distribution network

    E-Print Network [OSTI]

    Mehrdad Dianati; Romain Alleaume

    2006-10-25

    The European projet Secoqc (Secure Communication based on Quantum Cryptography) aims at developing a global network for unconditionally secure key distribution. This paper specifies the requirements and presents the principles guiding the design of this network, and relevant to its architecture and protocols.

  9. A Distributed Public Key Caching Scheme in Large Wireless Networks

    E-Print Network [OSTI]

    Deng, Jing

    -constrained, in terms of computational power, battery energy, and on-board memory space. For example, the prototypeA Distributed Public Key Caching Scheme in Large Wireless Networks Yuan Kong Jing Deng Stephen R in wireless networks, the public keys of the nodes need to be widely available and signed by a Certificate

  10. Distributed Uplink Scheduling in EV-DO Rev. A Networks

    E-Print Network [OSTI]

    Guerin, Roch

    Distributed Uplink Scheduling in EV-DO Rev. A Networks Ashwin Sridharan (Sprint Nextel) Ramesh Subbaraman, Roch Guérin (ESE, University of Pennsylvania) #12;5/23/2007 Networking 2007 - Atlanta 2 Overview of Problem · Most modern wireless systems ­ Deliver high performance through tight control of transmissions

  11. Degree-distribution stability of scale-free networks

    E-Print Network [OSTI]

    Zhenting Hou; Xiangxing Kong; Dinghua Shi; Guanrong Chen

    2008-05-09

    Based on the concept and techniques of first-passage probability in Markov chain theory, this letter provides a rigorous proof for the existence of the steady-state degree distribution of the scale-free network generated by the Barabasi-Albert (BA) model, and mathematically re-derives the exact analytic formulas of the distribution. The approach developed here is quite general, applicable to many other scale-free types of complex networks.

  12. Apparatus and method for data communication in an energy distribution network

    DOE Patents [OSTI]

    Hussain, Mohsin; LaPorte, Brock; Uebel, Udo; Zia, Aftab

    2014-07-08

    A system for communicating information on an energy distribution network is disclosed. In one embodiment, the system includes a local supervisor on a communication network, wherein the local supervisor can collect data from one or more energy generation/monitoring devices. The system also includes a command center on the communication network, wherein the command center can generate one or more commands for controlling the one or more energy generation devices. The local supervisor can periodically transmit a data signal indicative of the data to the command center via a first channel of the communication network at a first interval. The local supervisor can also periodically transmit a request for a command to the command center via a second channel of the communication network at a second interval shorter than the first interval. This channel configuration provides effective data communication without a significant increase in the use of network resources.

  13. Distributed services for mobile ad hoc networks 

    E-Print Network [OSTI]

    Cao, Guangtong

    2005-11-01

    by equipping each node with a device like a GPS receiver, a GPS receiver?s functionality is limited due to its geographical constraints, high energy consumption and cost. Therefore, studying clock synchronization algorithms for mobile ad hoc networks has 7... Network Lifetime vs. Number of Nodes : : : : : : : : : : : : : : : : : 61 24 Standard Deviation of Remaining Energy vs. Number of Nodes : : : 63 25 The k-Mutual Exclusion System Architecture : : : : : : : : : : : : : 71 26 Operation of KRL Algorithm on a...

  14. Designing pricing strategies for coordination of networked distributed energy resources

    E-Print Network [OSTI]

    Liberzon, Daniel

    Designing pricing strategies for coordination of networked distributed energy resources Bahman, by a group of distributed energy resources (DERs). The aggregator interacts with the wholesale electricity. The objective is for the aggregator to design a pricing strategy for incentivizing DERs to modify their active

  15. Distributed Minimum Energy Data Gathering and Aggregation in Sensor Networks

    E-Print Network [OSTI]

    Liang, Ben

    Distributed Minimum Energy Data Gathering and Aggregation in Sensor Networks Kevin Yuen, Baochun Li-- In this paper, we propose an effective distributed algorithm to solve the minimum energy data gathering (MEDG input packets into a single output packet. To achieve minimum energy data gathering, the optimal trans

  16. Multi-Level TESLA: Broadcast Authentication for Distributed Sensor Networks

    E-Print Network [OSTI]

    Ning, Peng

    Multi-Level µTESLA: Broadcast Authentication for Distributed Sensor Networks DONGGANG LIU and PENG named multi-level µTESLA based on µTESLA, a broadcast authentication protocol whose scalability is limited by its unicast-based initial parameter distribution. Multi-level µTESLA satisfies several nice

  17. Smard Grid Software Applications for Distribution Network Load Forecasting Eugene A. Feinberg, Jun Fei

    E-Print Network [OSTI]

    Feinberg, Eugene A.

    of the distribution network. Keywords: load forecasting, feeder, transformer, load pocket, SmartGrid I. INTRODUCTION

  18. Wireless Distributed Sensing and Computing in SDR based Radio Network -Implementation and

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    Wireless Distributed Sensing and Computing in SDR based Radio Network - Implementation building the large scale cognitive radio network in TTU(Tennessee Technological University), a wireless). This network demonstrates the combination of the wireless distributed sensing applications with corresponding

  19. Neural network determination of parton distributions: the nonsinglet case

    E-Print Network [OSTI]

    The NNPDF Collaboration; Luigi Del Debbio; Stefano Forte; Jose I. Latorre; Andrea Piccione; Joan Rojo

    2007-01-16

    We provide a determination of the isotriplet quark distribution from available deep--inelastic data using neural networks. We give a general introduction to the neural network approach to parton distributions, which provides a solution to the problem of constructing a faithful and unbiased probability distribution of parton densities based on available experimental information. We discuss in detail the techniques which are necessary in order to construct a Monte Carlo representation of the data, to construct and evolve neural parton distributions, and to train them in such a way that the correct statistical features of the data are reproduced. We present the results of the application of this method to the determination of the nonsinglet quark distribution up to next--to--next--to--leading order, and compare them with those obtained using other approaches.

  20. Interconnecting PV on New York City's Secondary Network Distribution System

    SciTech Connect (OSTI)

    K. Anderson; M. Coddington; K. Burman; S. Hayter; B. Kroposki; and A. Watson

    2009-11-30

    The U.S. Department of Energy (DOE) has teamed with cities across the country through the Solar America Cities (SAC) partnership program to help reduce barriers and accelerate implementation of solar energy. The New York City SAC team is a partnership between the City University of New York (CUNY), the New York City Mayor s Office of Long-term Planning and Sustainability, and the New York City Economic Development Corporation (NYCEDC).The New York City SAC team is working with DOE s National Renewable Energy Laboratory (NREL) and Con Edison, the local utility, to develop a roadmap for photovoltaic (PV) installations in the five boroughs. The city set a goal to increase its installed PV capacity from1.1 MW in 2005 to 8.1 MW by 2015 (the maximum allowed in 2005). A key barrier to reaching this goal, however, is the complexity of the interconnection process with the local utility. Unique challenges are associated with connecting distributed PV systems to secondary network distribution systems (simplified to ���¢��������networks���¢������� in this report). Although most areas of the country use simpler radial distribution systems to distribute electricity, larger metropolitan areas like New York City typically use networks to increase reliability in large load centers. Unlike the radial distribution system, where each customer receives power through a single line, a network uses a grid of interconnected lines to deliver power to each customer through several parallel circuits and sources. This redundancy improves reliability, but it also requires more complicated coordination and protection schemes that can be disrupted by energy exported from distributed PV systems. Currently, Con Edison studies each potential PV system in New York City to evaluate the system s impact on the network, but this is time consuming for utility engineers and may delay the customer s project or add cost for larger installations. City leaders would like to streamline this process to facilitate faster, simpler, and less expensive distributed PV system interconnections. To assess ways to improve the interconnection process, NREL conducted a four-part study with support from DOE. The NREL team then compiled the final reports from each study into this report. In Section 1���¢��������PV Deployment Analysis for New York City���¢��������we analyze the technical potential for rooftop PV systems in the city. This analysis evaluates potential PV power production in ten Con Edison networks of various locations and building densities (ranging from high density apartments to lower density single family homes). Next, we compare the potential power production to network loads to determine where and when PV generation is most likely to exceed network load and disrupt network protection schemes. The results of this analysis may assist Con Edison in evaluating future PV interconnection applications and in planning future network protection system upgrades. This analysis may also assist other utilities interconnecting PV systems to networks by defining a method for assessing the technical potential of PV in the network and its impact on network loads. Section 2���¢��������A Briefing for Policy Makers on Connecting PV to a Network Grid���¢��������presents an overview intended for nontechnical stakeholders. This section describes the issues associated with interconnecting PV systems to networks, along with possible solutions. Section 3���¢��������Technical Review of Concerns and Solutions to PV Interconnection in New Y

  1. Properties of real networks: degree distribution

    E-Print Network [OSTI]

    Albert, Réka

    . Nakarado, Phys. Rev. E 69, 025103(R) (2004) nodes: generators, power stations edges: power lines )KPlotting power laws and exponentials exp 1- = cx)x(f x c)x(f - = 50. cx)x(f - = #12;The in- and out-degree distribution of the WWW are power-laws 12 452 . . )( )( - - kkP kkP in out R. Albert, H. Jeong, A

  2. Asymmetry in In-Degree and Out-Degree Distributions of Large-Scale Industrial Networks

    E-Print Network [OSTI]

    Luo, Jianxi; Whitney, Daniel E.

    2015-01-01

    Network structures in industrial pricing: the effect ofrecession? ranking U.S. industrial sectors by the Power-of-distributions of large-scale industrial networks Jianxi Luo

  3. Primary Voltage Control in Active Distribution Networks via Broadcast Signals

    E-Print Network [OSTI]

    Diggavi, Suhas

    energy storage. We show that it is possible to use the same broadcast signal deployed for controlling) for real-time demand response developed by the authors in a previous contribution. We estimate the energy--Active distribution network, ancillary services, primary voltage control, electrical energy storage systems, broad

  4. Distribution Network Design: Selection and Sizing of Congested Connections

    E-Print Network [OSTI]

    Nagi, Rakesh

    promotions (i.e., seasonal) and regular demand. In response to this, at the strategic or aggregate level demand. Several multinational companies use distribution center networks in this manner. For example. For most fast moving consumer goods, demand patterns are quite erratic, being a function of both sales

  5. Modeling the Interplay Between Individual Behavior and Network Distributions

    E-Print Network [OSTI]

    Yang, Yang; Dong, Yuxiao; Mei, Qiaozhu; Johnson, Reid A; Chawla, Nitesh V

    2015-01-01

    It is well-known that many networks follow a power-law degree distribution; however, the factors that influence the formation of their distributions are still unclear. How can one model the connection between individual actions and network distributions? How can one explain the formation of group phenomena and their evolutionary patterns? In this paper, we propose a unified framework, M3D, to model human dynamics in social networks from three perspectives: macro, meso, and micro. At the micro-level, we seek to capture the way in which an individual user decides whether to perform an action. At the meso-level, we study how group behavior develops and evolves over time, based on individual actions. At the macro-level, we try to understand how network distributions such as power-law (or heavy-tailed phenomena) can be explained by group behavior. We provide theoretical analysis for the proposed framework, and discuss the connection of our framework with existing work. The framework offers a new, flexible way to e...

  6. Topic 5: Renewable Power 1Networking and Distributed Systems

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    in Smart Grid 3 · We are interested in power plants with low carbon footprint: · Both CO2 and CH4 in Smart Grid 5 · Carbon footprint is also defined for power plants: · Conventional coal combustion hasTopic 5: Renewable Power 1Networking and Distributed Systems Department of Electrical & Computer

  7. On Distributed Fault-Tolerant Detection in Wireless Sensor Networks

    E-Print Network [OSTI]

    Dong, Ming

    --Distributed event detection, fault tolerance, sensor fusion, energy-efficiency, wireless sensor networks. æ 1 to choose a proper neighborhood size n for a sensor node in fault correction such that the energy could to achieve better detection and better balance between detection accuracy and energy usage. Our work makes

  8. Effective Scheduling for Coded Distributed Storage in Wireless Sensor Networks

    E-Print Network [OSTI]

    Boucherie, Richard J.

    A distributed storage approach is proposed to access data reliably and to cope with node failures in wireless environments, the wireless sen- sor network is vulnerable to sensor device failures, and unreliable precisely, we address the following problem. Data is generated by a single sensor device and needs

  9. Joint physical and numerical modeling of water distribution networks.

    SciTech Connect (OSTI)

    Zimmerman, Adam; O'Hern, Timothy John; Orear, Leslie Jr.; Kajder, Karen C.; Webb, Stephen Walter; Cappelle, Malynda A.; Khalsa, Siri Sahib; Wright, Jerome L.; Sun, Amy Cha-Tien; Chwirka, J. Benjamin; Hartenberger, Joel David; McKenna, Sean Andrew; van Bloemen Waanders, Bart Gustaaf; McGrath, Lucas K.; Ho, Clifford Kuofei

    2009-01-01

    This report summarizes the experimental and modeling effort undertaken to understand solute mixing in a water distribution network conducted during the last year of a 3-year project. The experimental effort involves measurement of extent of mixing within different configurations of pipe networks, measurement of dynamic mixing in a single mixing tank, and measurement of dynamic solute mixing in a combined network-tank configuration. High resolution analysis of turbulence mixing is carried out via high speed photography as well as 3D finite-volume based Large Eddy Simulation turbulence models. Macroscopic mixing rules based on flow momentum balance are also explored, and in some cases, implemented in EPANET. A new version EPANET code was developed to yield better mixing predictions. The impact of a storage tank on pipe mixing in a combined pipe-tank network during diurnal fill-and-drain cycles is assessed. Preliminary comparison between dynamic pilot data and EPANET-BAM is also reported.

  10. Distributed Source Localization in Wireless Underground Sensor Networks

    E-Print Network [OSTI]

    Chen, Hongyang; Wang, Chen

    2011-01-01

    Node localization plays an important role in many practical applications of wireless underground sensor networks (WUSNs), such as finding the locations of earthquake epicenters, underground explosions, and microseismic events in mines. It is more difficult to obtain the time-difference-of-arrival (TDOA) measurements in WUSNs than in terrestrial wireless sensor networks because of the unfavorable channel characteristics in the underground environment. The robust Chinese remainder theorem (RCRT) has been shown to be an effective tool for solving the phase ambiguity problem and frequency estimation problem in wireless sensor networks. In this paper, the RCRT is used to robustly estimate TDOA or range difference in WUSNs and therefore improves the ranging accuracy in such networks. After obtaining the range difference, distributed source localization algorithms based on a diffusion strategy are proposed to decrease the communication cost while satisfying the localization accuracy requirement. Simulation results c...

  11. Methodology The electricity generation and distribution network in the Western United States is

    E-Print Network [OSTI]

    Hall, Sharon J.

    Methodology The electricity generation and distribution network in the Western United States is comprised of power plants, electric utilities, electrical transformers, transmission and distribution infrastructure, etc. We conceptualize the system as a transportation network with resources (electricity

  12. ETM (Distribution Network Automation on 10 kV cable line stations...

    Open Energy Info (EERE)

    ETM (Distribution Network Automation on 10 kV cable line stations) (Smart Grid Project) Jump to: navigation, search Project Name ETM (Distribution Network Automation on 10 kV cable...

  13. Distributed Information Storage and Retrieval in 3D Sensor Networks with General Topologies

    E-Print Network [OSTI]

    Jin, Miao

    Yang, Miao Jin, Yao Zhao, and Hongyi Wu Abstract--Distributed in-network data-centric processing aims of the individual network nodes. Double-ruling based schemes support efficient in-network data-centric information distributed in-network data-centric processing schemes. In this research we propose a geographic location free

  14. Optimizing intermittent water supply in urban pipe distribution networks

    E-Print Network [OSTI]

    Lieb, Anna M; Wilkening, Jon

    2015-01-01

    In many urban areas of the developing world, piped water is supplied only intermittently, as valves direct water to different parts of the water distribution system at different times. The flow is transient, and may transition between free-surface and pressurized, resulting in complex dynamical features with important consequences for water suppliers and users. Here, we develop a computational model of transition, transient pipe flow in a network, accounting for a wide variety of realistic boundary conditions. We validate the model against several published data sets, and demonstrate its use on a real pipe network. The model is extended to consider several optimization problems motivated by realistic scenarios. We demonstrate how to infer water flow in a small pipe network from a single pressure sensor, and show how to control water inflow to minimize damaging pressure gradients.

  15. A Local Control Approach to Voltage Regulation in Distribution Networks

    E-Print Network [OSTI]

    Dominguez-Garcia, Alejandro

    , but the state already has 2900 MW of installed capacity [4], enough for about 600,000 households. Therefore we of passive demands, buses in the network could include clusters of households with rooftop solar installations, electric vehicles, and storage; these generation and storage devices are commonly referred

  16. Copyright 2004 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice.

    E-Print Network [OSTI]

    © Copyright 2004 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice. Sun Microsystems Sun Cryptographic Accelerator 4000 Firmware 2004 SUN MICROSYSTEMS Page 2 of 18 This document may be freely reproduced and distributed whole

  17. Copyright 2008 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice.

    E-Print Network [OSTI]

    © Copyright 2008 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice. Sun Microsystems Sun Crypto Accelerator 6000 Bootstrap Version 1;© Copyright 2008 SUN MICROSYSTEMS Page 2 of 26 This document may be freely reproduced and distributed whole

  18. Copyright 2004 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice.

    E-Print Network [OSTI]

    © Copyright 2004 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice. Sun Microsystems Sun Cryptographic Accelerator 4000 Firmware 2004 SUN MICROSYSTEMS Page 2 of 20 This document may be freely reproduced and distributed whole

  19. Copyright 2008 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice.

    E-Print Network [OSTI]

    © Copyright 2008 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice. Sun Microsystems Sun Crypto Accelerator 6000 Bootstrap Version 1;© Copyright 2007 SUN MICROSYSTEMS Page 2 of 23 This document may be freely reproduced and distributed whole

  20. Copyright 2004 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice.

    E-Print Network [OSTI]

    © Copyright 2004 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice. Sun Microsystems Sun Cryptographic Accelerator 4000 Firmware;© Copyright 2004 SUN MICROSYSTEMS Page 2 of 21 This document may be freely reproduced and distributed whole

  1. A Multi Agent-Based Framework for Simulating Household PHEV Distribution and Electric Distribution Network Impact

    SciTech Connect (OSTI)

    Cui, Xiaohui [ORNL] [ORNL; Liu, Cheng [ORNL] [ORNL; Kim, Hoe Kyoung [ORNL] [ORNL; Kao, Shih-Chieh [ORNL] [ORNL; Tuttle, Mark A [ORNL] [ORNL; Bhaduri, Budhendra L [ORNL] [ORNL

    2011-01-01

    The variation of household attributes such as income, travel distance, age, household member, and education for different residential areas may generate different market penetration rates for plug-in hybrid electric vehicle (PHEV). Residential areas with higher PHEV ownership could increase peak electric demand locally and require utilities to upgrade the electric distribution infrastructure even though the capacity of the regional power grid is under-utilized. Estimating the future PHEV ownership distribution at the residential household level can help us understand the impact of PHEV fleet on power line congestion, transformer overload and other unforeseen problems at the local residential distribution network level. It can also help utilities manage the timing of recharging demand to maximize load factors and utilization of existing distribution resources. This paper presents a multi agent-based simulation framework for 1) modeling spatial distribution of PHEV ownership at local residential household level, 2) discovering PHEV hot zones where PHEV ownership may quickly increase in the near future, and 3) estimating the impacts of the increasing PHEV ownership on the local electric distribution network with different charging strategies. In this paper, we use Knox County, TN as a case study to show the simulation results of the agent-based model (ABM) framework. However, the framework can be easily applied to other local areas in the US.

  2. Complexity analysis of pipeline mapping problems in distributed heterogeneous networks

    SciTech Connect (OSTI)

    Lin, Ying; Wu, Qishi; Zhu, Mengxia; Rao, Nageswara S

    2009-04-01

    Largescale scientific applications require using various system resources to execute complex computing pipelines in distributed networks to support collaborative research. System resources are typically shared in the Internet or over dedicated connections based on their location, availability, capability, and capacity. Optimizing the network performance of computing pipelines in such distributed environments is critical to the success of these applications. We consider two types of largescale distributed applications: (1) interactive applications where a single dataset is sequentially processed along a pipeline; and (2) streaming applications where a series of datasets continuously flow through a pipeline. The computing pipelines of these applications consist of a number of modules executed in a linear order in network environments with heterogeneous resources under different constraints. Our goal is to find an efficient mapping scheme that allocates the modules of a pipeline to network nodes for minimum endtoend delay or maximum frame rate. We formulate the pipeline mappings in distributed environments as optimization problems and categorize them into six classes with different optimization goals and mapping constraints: (1) Minimum Endtoend Delay with No Node Reuse (MEDNNR), (2) Minimum Endtoend Delay with Contiguous Node Reuse (MEDCNR), (3) Minimum Endtoend Delay with Arbitrary Node Reuse (MEDANR), (4) Maximum Frame Rate with No Node Reuse or Share (MFRNNRS), (5) Maximum Frame Rate with Contiguous Node Reuse and Share (MFRCNRS), and (6) Maximum Frame Rate with Arbitrary Node Reuse and Share (MFRANRS). Here, 'contiguous node reuse' means that multiple contiguous modules along the pipeline may run on the same node and 'arbitrary node reuse' imposes no restriction on node reuse. Note that in interactive applications, a node can be reused but its resource is not shared. We prove that MEDANR is polynomially solvable and the rest are NP-complete. MEDANR, where either contiguous or noncontiguous modules in the pipeline can be mapped onto the same node, is essentially the Maximum n-hop Shortest Path problem, and can be solved using a dynamic programming method. In MEDNNR and MFRNNRS, any network node can be used only once, which requires selecting the same number of nodes for onetoone onto mapping. We show its NP-completeness by reducing from the Hamiltonian Path problem. Node reuse is allowed in MEDCNR, MFRCNRS and MFRANRS, which are similar to the Maximum n-hop Shortest Path problem that considers resource sharing. We prove their NP-completeness by reducing from the Disjoint-Connecting-Path Problem and Widest path with the Linear Capacity Constraints problem, respectively.

  3. Distributed Motion Constraints for Algebraic Connectivity of Robotic Networks

    E-Print Network [OSTI]

    Schuresko, Michael; Cortés, Jorge

    2009-01-01

    E. : On synchronous robotic networks - Part I: models,a simulation environment for robotic networks. http://function associated to the robotic network. 2.1 The Graph

  4. DISTRIBUTED POSE AVERAGING IN CAMERA NETWORKS VIA CONSENSUS ON SE(3) Roberto Tron, Rene Vidal

    E-Print Network [OSTI]

    DISTRIBUTED POSE AVERAGING IN CAMERA NETWORKS VIA CONSENSUS ON SE(3) Roberto Tron, Ren´e Vidal distributed algorithms for esti- mating the average pose of an object viewed by a localized network of camera networks; pose estimation; consensus; optimization on manifolds. 1. INTRODUCTION Recent hardware

  5. DARD: Distributed Adaptive Routing for Datacenter Networks Dept. of Computer Science, Duke University

    E-Print Network [OSTI]

    Yang, Xiaowei

    DARD: Distributed Adaptive Routing for Datacenter Networks Xin Wu Dept. of Computer Science, Duke xwy@cs.duke.edu Abstract--Datacenter networks typically have many paths connecting each host pair, a Distributed Adaptive Routing architecture for Datacenter networks. DARD allows each end host to move traffic

  6. LoDN: Logistical Distribution Network Logistical Computing and Internetworking Laboratory

    E-Print Network [OSTI]

    Plank, Jim

    LoDN: Logistical Distribution Network Logistical Computing and Internetworking Laboratory Computer, Stephen Soltesz gelas@cs.utk.edu This paper introduces the Logistical Distributed Network (LoDN) tool and popularity [1]. Logistical Networking makes it possible to deploy a globally scalable storage service

  7. Communicated by Rodney Brooks A Distributed Neural Network Architecture for Hexapod

    E-Print Network [OSTI]

    Beer, Randall D.

    Communicated by Rodney Brooks A Distributed Neural Network Architecture for Hexapod Robot present a fully distributed neural network architecture for control- ling the locomotion of a hexapod of Technology #12;Neural Network Architecturefor Hexapod Robot Locomotion 357 Figure 1: A comparison

  8. Discrimination of models including doubly charged scalar bosons by using tau lepton decay distributions

    E-Print Network [OSTI]

    Hiroaki Sugiyama; Koji Tsumura; Hiroshi Yokoya

    2012-10-05

    The doubly charged scalar boson (H^{\\pm\\pm}) is introduced in several models of the new physics beyond the standard model. The H^{\\pm\\pm} has Yukawa interactions with two left-handed charged leptons or two right-handed charged leptons depending on the models. We study kinematical properties of H^{\\pm\\pm} decay products through tau leptons in order to discriminate the chiral structures of the new Yukawa interaction. The chirality of tau leptons can be measured by the energy distributions of the tau decay products, and thus the chiral structure of the new Yukawa interaction can be traced in the invariant-mass distributions of the H^{\\pm\\pm} decay products. We perform simulation studies for the typical decay patterns of the H^{\\pm\\pm} with simple event selections and tau-tagging procedures, and show that the chiral structure of the Yukawa interactions of H^{\\pm\\pm} can be distinguished by measuring the invariant-mass distributions.

  9. Distributional properties of Euclidean distances in wireless networks involving road systems

    E-Print Network [OSTI]

    Schmidt, Volker

    1 Distributional properties of Euclidean distances in wireless networks involving road systems of large wireless networks. The network geometry is modelled by random geometric graphs, and the locations are closely related with the interference geometry and, consequently, the performance of wireless networks

  10. Distributed Network Monitoring using Mobile Agents Paradigm Farhad Kamangar, David Levine, Gergely V. Zruba, and Navakiran Chitturi

    E-Print Network [OSTI]

    Záruba, Gergely

    , servers and management agents. The network management load is equally distributed between managers monitoring and management has been done using predominantly centralized techniques. Mobile agents have been, Network Management, Mobile Agent, Java, Distributed, Dynamic, Network Modeling, Fault

  11. Radiation detection and situation management by distributed sensor networks

    SciTech Connect (OSTI)

    Jan, Frigo; Mielke, Angela; Cai, D Michael

    2009-01-01

    Detection of radioactive materials in an urban environment usually requires large, portal-monitor-style radiation detectors. However, this may not be a practical solution in many transport scenarios. Alternatively, a distributed sensor network (DSN) could complement portal-style detection of radiological materials through the implementation of arrays of low cost, small heterogeneous sensors with the ability to detect the presence of radioactive materials in a moving vehicle over a specific region. In this paper, we report on the use of a heterogeneous, wireless, distributed sensor network for traffic monitoring in a field demonstration. Through wireless communications, the energy spectra from different radiation detectors are combined to improve the detection confidence. In addition, the DSN exploits other sensor technologies and algorithms to provide additional information about the vehicle, such as its speed, location, class (e.g. car, truck), and license plate number. The sensors are in-situ and data is processed in real-time at each node. Relevant information from each node is sent to a base station computer which is used to assess the movement of radioactive materials.

  12. Extension of thermonuclear functions through the pathway model including Maxwell-Boltzmann and Tsallis distributions

    E-Print Network [OSTI]

    H. J. Haubold; D. Kumar

    2007-08-16

    The Maxwell-Boltzmannian approach to nuclear reaction rate theory is extended to cover Tsallis statistics (Tsallis, 1988) and more general cases of distribution functions. An analytical study of respective thermonuclear functions is being conducted with the help of statistical techniques. The pathway model, recently introduced by Mathai (2005), is utilized for thermonuclear functions and closed-form representations are obtained in terms of H-functions and G-functions. Maxwell-Boltzmannian thermonuclear functions become particular cases of the extended thermonuclear functions. A brief review on the development of the theory of analytic representations of nuclear reaction rates is given.

  13. Continuous-time Proportional-Integral Distributed Optimization for Networked Systems

    E-Print Network [OSTI]

    Egerstedt, Magnus

    Continuous-time Proportional-Integral Distributed Optimization for Networked Systems Greg Drogea1;Continuous-time Proportional-Integral Distributed Optimization for Networked Systems Greg Droge and Hiroaki these methods to develop a continuous-time proportional-integral distributed optimization method. Furthermore

  14. Aalborg Universitet Distributed Secondary Control for Islanded MicroGrids A Networked Control Systems

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Distributed Secondary Control for Islanded MicroGrids ­ A Networked Control, Q., Vasquez, J. C., & Guerrero, J. M. (2012). Distributed Secondary Control for Islanded MicroGrids M.; , "Distributed secondary control for islanded MicroGrids - A networked control systems approach

  15. Tree-structured Data Regeneration with Network Coding in Distributed Storage Systems

    E-Print Network [OSTI]

    Li, Baochun

    Tree-structured Data Regeneration with Network Coding in Distributed Storage Systems Jun Li, Shuang of Toronto, Canada bli@eecg.toronto.edu Abstract--Distributed storage systems, built on peer-to-peer networks influence the data reliability and availability of distributed storage systems. It has been ac- knowledged

  16. Design of Robust Distribution Networks Run by fourth Party Logistics Service Providers

    E-Print Network [OSTI]

    Armbruster, Dieter

    Design of Robust Distribution Networks Run by fourth Party Logistics Service Providers M logistics service provider (LSP), who faces the problem of distributing different products from suppliers distributions. 1 Introduction The logistics networks considered in this paper consist of production facilities

  17. FEL3330 Networked and Multi-Agent Control Lecture 11: Distributed Estimation

    E-Print Network [OSTI]

    Dimarogonas, Dimos

    FEL3330 Networked and Multi-Agent Control Systems Lecture 11: Distributed Estimation Distributed Estimation Distributed Localization FEL3330, Lecture 11 1 June 8, 2011 #12;Distributed Estimation is from the fact that P-1^x = HR-1 V y. FEL3330, Lecture 11 2 June 8, 2011 #12;Distributed Estimation Each

  18. A stepped leader model for lightning including charge distribution in branched channels

    SciTech Connect (OSTI)

    Shi, Wei; Zhang, Li [School of Electrical Engineering, Shandong University, Jinan 250061 (China); Li, Qingmin, E-mail: lqmeee@ncepu.edu.cn [Beijing Key Lab of HV and EMC, North China Electric Power University, Beijing 102206 (China); State Key Lab of Alternate Electrical Power System with Renewable Energy Sources, Beijing 102206 (China)

    2014-09-14

    The stepped leader process in negative cloud-to-ground lightning plays a vital role in lightning protection analysis. As lightning discharge usually presents significant branched or tortuous channels, the charge distribution along the branched channels and the stochastic feature of stepped leader propagation were investigated in this paper. The charge density along the leader channel and the charge in the leader tip for each lightning branch were approximated by introducing branch correlation coefficients. In combination with geometric characteristics of natural lightning discharge, a stochastic stepped leader propagation model was presented based on the fractal theory. By comparing simulation results with the statistics of natural lightning discharges, it was found that the fractal dimension of lightning trajectory in simulation was in the range of that observed in nature and the calculation results of electric field at ground level were in good agreement with the measurements of a negative flash, which shows the validity of this proposed model. Furthermore, a new equation to estimate the lightning striking distance to flat ground was suggested based on the present model. The striking distance obtained by this new equation is smaller than the value estimated by previous equations, which indicates that the traditional equations may somewhat overestimate the attractive effect of the ground.

  19. Copyright 2007 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice.

    E-Print Network [OSTI]

    © Copyright 2007 SUN MICROSYSTEMS This document may be freely reproduced and distributed whole and intact including this Copyright Notice. Sun Microsystems Sun Crypto Accelerator 6000 Firmware Version 1.0.7 FIPS 140-2 Non-Proprietary Security Policy Level 3 Validation #12;© Copyright 2007 SUN MICROSYSTEMS

  20. Optimal reverse carpooling over wireless networks - a distributed optimization approach

    E-Print Network [OSTI]

    Parandehgheibi, Ali

    We focus on a particular form of network coding, reverse carpooling, in a wireless network where the potentially coded transmitted messages are to be decoded immediately upon reception. The network is fixed and known, and ...

  1. Entanglement distribution over quantum code-division-multiple-access networks

    E-Print Network [OSTI]

    Chang-long Zhu; Nan Yang; Yu-xi Liu; Franco Nori; Jing Zhang

    2015-07-09

    We present a method for quantum entanglement distribution over a so-called code-division-multiple-access network, in which two pairs of users share the same quantum channel to transmit information. The main idea of this method is to use different broad-band chaotic phase shifts, generated by electro-optic modulators (EOMs) and chaotic Colpitts circuits, to encode the information-bearing quantum signals coming from different users, and then recover the masked quantum signals at the receiver side by imposing opposite chaotic phase shifts. The chaotic phase shifts given to different pairs of users are almost uncorrelated due to the randomness of chaos and thus the quantum signals from different pair of users can be distinguished even when they are sent via the same quantum channel. It is shown that two maximally-entangled states can be generated between two pairs of users by our method mediated by bright coherent lights, which can be more easily implemented in experiments compared with single-photon lights. Our method is robust under the channel noises if only the decay rates of the information-bearing fields induced by the channel noises are not quite high. Our study opens up new perspectives for addressing and transmitting quantum information in future quantum networks.

  2. Information Infrastructures in Distributed Environments: Algorithms for Mobile Networks and Resource Allocation 

    E-Print Network [OSTI]

    Chung, Hyun-Chul

    2013-10-28

    A distributed system is a collection of computing entities that communicate with each other to solve some problem. Distributed systems impact almost every aspect of daily life (e.g., cellular networks and the Internet); ...

  3. Energy Efficient Distributed Data Fusion In Multihop Wireless Sensor Networks

    E-Print Network [OSTI]

    Huang, Yi

    2010-01-01

    estimation in energy-constrained wireless sensor networks,”J. Wu, “Energy-e?cient coverage problems in wireless ad hoca transmission energy problem for wireless sensor networks.

  4. Distribution of maximal clique size of the vertices for theoretical small-world networks and real-world networks

    E-Print Network [OSTI]

    Meghanathan, Natarajan

    2015-01-01

    Our primary objective in this paper is to study the distribution of the maximal clique size of the vertices in complex networks. We define the maximal clique size for a vertex as the maximum size of the clique that the vertex is part of and such a clique need not be the maximum size clique for the entire network. We determine the maximal clique size of the vertices using a modified version of a branch-and-bound based exact algorithm that has been originally proposed to determine the maximum size clique for an entire network graph. We then run this algorithm on two categories of complex networks: One category of networks capture the evolution of small-world networks from regular network (according to the wellknown Watts-Strogatz model) and their subsequent evolution to random networks; we show that the distribution of the maximal clique size of the vertices follows a Poisson-style distribution at different stages of the evolution of the small-world network to a random network; on the other hand, the maximal cl...

  5. A New Linearization Method of Unbalanced Electrical Distribution Networks

    SciTech Connect (OSTI)

    Liu, Guodong [ORNL; Xu, Yan [ORNL; Ceylan, Oguzhan [ORNL; Tomsovic, Kevin [University of Tennessee, Knoxville (UTK)

    2014-01-01

    Abstract--- With increasing penetration of distributed generation in the distribution networks (DN), the secure and optimal operation of DN has become an important concern. As DN control and operation strategies are mostly based on the linearized sensitivity coefficients between controlled variables (e.g., node voltages, line currents, power loss) and control variables (e.g., power injections, transformer tap positions), efficient and precise calculation of these sensitivity coefficients, i.e. linearization of DN, is of fundamental importance. In this paper, the derivation of the node voltages and power loss as functions of the nodal power injections and transformers' tap-changers positions is presented, and then solved by a Gauss-Seidel method. Compared to other approaches presented in the literature, the proposed method takes into account different load characteristics (e.g., constant PQ, constant impedance, constant current and any combination of above) of a generic multi-phase unbalanced DN and improves the accuracy of linearization. Numerical simulations on both IEEE 13 and 34 nodes test feeders show the efficiency and accuracy of the proposed method.

  6. FaultTolerant Distributed Algorithms in Sparse Ad Hoc Wireless Networks

    E-Print Network [OSTI]

    Fault­Tolerant Distributed Algorithms in Sparse Ad Hoc Wireless Networks (SPAWN) BETTINA WEISS communication technologies, wireless ad hoc networks are increasingly commonplace nowadays. Spontaneous (``ad wireless sensor networks and disaster area communication systems. It is also a major enabling technology

  7. Non-Uniform Entropy Compression for Uniform Energy Distribution in Wireless Sensor Networks

    E-Print Network [OSTI]

    California at Davis, University of

    -non-homogeneity in the network. Bottleneck nodes trade computation energy for transmission energy, which extends and normalizesNon-Uniform Entropy Compression for Uniform Energy Distribution in Wireless Sensor Networks to increase the network's lifetime and to normalize the energy use per unit time, but they each have

  8. Towards Building an Optimal Demand Response Framework for DC Distribution Networks

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Towards Building an Optimal Demand Response Framework for DC Distribution Networks Hamed Mohsenian, an optimization-based foundation is proposed for demand response in DC distribution networks in presence to assess the performance and to gain insights into the proposed demand-response paradigm. Keywords: DC

  9. Constraint-based Maintenance Scheduling on an Electric Power-Distribution Network

    E-Print Network [OSTI]

    Ros, Lluís

    Constraint-based Maintenance Scheduling on an Electric Power-Distribution Network Tom Creemers1-distribution network involves the scheduling of multiple maintenance and unforeseen repair tasks. The main resource, energy losses, and the cost of the necessary switching operations. In case tasks are carried out

  10. A Distributed Fault/Intrusion-Tolerant Sensor Data Storage Scheme Based on Network Coding and

    E-Print Network [OSTI]

    Shen, Xuemin "Sherman"

    1 A Distributed Fault/Intrusion-Tolerant Sensor Data Storage Scheme Based on Network Coding/intrusion-tolerant data storage scheme based on network coding and homomorphic fingerprinting in volatile WSNs (Sherman) Shen, Fellow, IEEE Abstract--Recently, distributed data storage has gained in- creasing

  11. Pipeline including network and topology for identifying, locating and quantifying physical phenomena

    DOE Patents [OSTI]

    Richardson, John G.; Moore, Karen A.; Carrington, Robert A.

    2006-02-14

    A method and system for detecting, locating and quantifying a physical phenomena such as strain or a deformation in a structure. A plurality of laterally adjacent conductors may each include a plurality of segments. Each segment is constructed to exhibit a unit value representative of a defined energy transmission characteristic. A plurality of identity groups are defined with each identity group comprising a plurality of segments including at least one segment from each of the plurality of conductors. The segments contained within an identity group are configured and arranged such that each of their associated unit values may be represented by a concatenated digit string which is a unique number relative to the other identity groups. Additionally, the unit values of the segments within an identity group maintain unique ratios with respect to the other unit values in the identity group.

  12. C3E also includes a network of leaders from the public, private, non-profit

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment|Marketing, LLCEfficiency | DepartmentEnergyofC3E also includes a

  13. Energy star compliant voice over internet protocol (VoIP) telecommunications network including energy star compliant VoIP devices

    DOE Patents [OSTI]

    Kouchri, Farrokh Mohammadzadeh

    2012-11-06

    A Voice over Internet Protocol (VoIP) communications system, a method of managing a communications network in such a system and a program product therefore. The system/network includes an ENERGY STAR (E-star) aware softswitch and E-star compliant communications devices at system endpoints. The E-star aware softswitch allows E-star compliant communications devices to enter and remain in power saving mode. The E-star aware softswitch spools messages and forwards only selected messages (e.g., calls) to the devices in power saving mode. When the E-star compliant communications devices exit power saving mode, the E-star aware softswitch forwards spooled messages.

  14. Asymmetry in in-degree and out-degree distributions of large-scale industrial networks

    E-Print Network [OSTI]

    Luo, Jianxi

    2015-01-01

    Many natural, physical and social networks commonly exhibit power-law degree distributions. In this paper, we discover previously unreported asymmetrical patterns in the degree distributions of incoming and outgoing links in the investigation of large-scale industrial networks, and provide interpretations. In industrial networks, nodes are firms and links are directed supplier-customer relationships. While both in- and out-degree distributions have "power law" regimes, out-degree distribution decays faster than in-degree distribution and crosses it at a consistent nodal degree. It implies that, as link degree increases, the constraints to the capacity for designing, producing and transmitting artifacts out to others grow faster than and surpasses those for acquiring, absorbing and synthesizing artifacts provided from others. We further discover that this asymmetry in decaying rates of in-degree and out-degree distributions is smaller in networks that process and transmit more decomposable artifacts, e.g. info...

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

    E-Print Network [OSTI]

    Ambike, Ajit Dilip

    2004-11-15

    This thesis is an e?ort to develop closed-loop control strategies on computer networks and study their stability in the presence of network delays and packet losses. An algorithm using predictors was designed to ...

  16. Photovoltaic Systems Interconnected onto Secondary Network Distribution Systems – Success Stories

    Broader source: Energy.gov [DOE]

    This report examines six case studies of photovoltaic (PV) systems integrated into secondary network systems. The six PV systems were chosen for evaluation because they are interconnected to secondary network systems located in four major Solar America Cities.

  17. Energy Efficient Distributed Data Fusion In Multihop Wireless Sensor Networks

    E-Print Network [OSTI]

    Huang, Yi

    2010-01-01

    estimation in energy-constrained wireless sensor networks,”a transmission energy problem for wireless sensor networks.J. Wu, “Energy-e?cient coverage problems in wireless ad hoc

  18. Trust and Independence Aware Decision Fusion in Distributed Networks

    E-Print Network [OSTI]

    California at Davis, University of

    -hop network scenario: a set of mobile or stationary nodes trying to monitor certain targets (objects, people

  19. Load forecasting for active distribution networks Simone Paoletti, Member, IEEE, Marco Casini, Member, IEEE, Antonio Giannitrapani, Member, IEEE,

    E-Print Network [OSTI]

    Giannitrapani, Antonello

    forecasting for distribution networks with Active Demand (AD), a new concept in smart-grids introduced within

  20. Passive Optical Network Approach to GigaHertz-Clocked Multiuser Quantum Key Distribution

    E-Print Network [OSTI]

    Veronica Fernandez; Robert J. Collins; Karen J. Gordon; Paul D. Townsend; Gerald S. Buller

    2006-12-15

    We present the application of quantum key distribution technologies to fiber-based broadband passive optical access networks. This application is based on our 850 nm wavelength gigahertz clock-rate single-receiver system, is compatible with existing telecommunications fiber and exploits a wavelength band not currently utilized in access networks. The developed quantum key distribution networks are capable of transmitting over distances consistent with the span of access links for metropolitan networks (10 km), at clock frequencies ranging up to 3 GHz.

  1. Mobile Sensor Networks for Leak and Backflow Detection in Water Distribution Systems

    E-Print Network [OSTI]

    Shihada, Basem

    Mobile Sensor Networks for Leak and Backflow Detection in Water Distribution Systems M. Agumbe detection are essential aspects of Water Distribution System (WDS) monitoring. Most existing solutions for leak detection in water distribution systems focus on the placement of expensive static sensors located

  2. Price Discovery in Dynamic Power Markets with Low-Voltage Distribution-Network Participants

    E-Print Network [OSTI]

    Caramanis, Michael

    Price Discovery in Dynamic Power Markets with Low-Voltage Distribution-Network Participants Elli. To this end, we define a distribution market that can discover spatiotemporal real and reactive power prices dynamically to optimize cost and utility of distributed generation assets, consumers, transformer and other

  3. Distributed Acoustic Conversation Shielding: An Application of a Smart Transducer Network

    E-Print Network [OSTI]

    Distributed Acoustic Conversation Shielding: An Application of a Smart Transducer Network Yasuhiro]@media.mit.edu ABSTRACT In this paper, we introduce distributed acoustic conversation shielding, a novel application, Conversation Shielding, Location-Awareness, Distributed Control, Sound Masking. 1. INTRODUCTION Actuators

  4. Decentralized Real-time Control of Water Distribution Networks Using Self-organizing Multi-Agent Systems

    E-Print Network [OSTI]

    Bauer, Bernhard

    Decentralized Real-time Control of Water Distribution Networks Using Self-organizing Multi for the decentralized real- time control of water distribution networks. The agents, which are associated with every pump, tank, and water tower of such a distribution network, interact by means of a decentralized

  5. Method and apparatus for reducing the harmonic currents in alternating-current distribution networks

    DOE Patents [OSTI]

    Beverly, L.H.; Hance, R.D.; Kristalinski, A.L.; Visser, A.T.

    1996-11-19

    An improved apparatus and method reduce the harmonic content of AC line and neutral line currents in polyphase AC source distribution networks. The apparatus and method employ a polyphase Zig-Zag transformer connected between the AC source distribution network and a load. The apparatus and method also employs a mechanism for increasing the source neutral impedance of the AC source distribution network. This mechanism can consist of a choke installed in the neutral line between the AC source and the Zig-Zag transformer. 23 figs.

  6. Method and apparatus for reducing the harmonic currents in alternating-current distribution networks

    DOE Patents [OSTI]

    Beverly, Leon H. (Lockport, IL); Hance, Richard D. (Elburn, IL); Kristalinski, Alexandr L. (Naperville, IL); Visser, Age T. (Geneva, IL)

    1996-01-01

    An improved apparatus and method reduce the harmonic content of AC line and neutral line currents in polyphase AC source distribution networks. The apparatus and method employ a polyphase Zig-Zag transformer connected between the AC source distribution network and a load. The apparatus and method also employs a mechanism for increasing the source neutral impedance of the AC source distribution network. This mechanism can consist of a choke installed in the neutral line between the AC source and the Zig-Zag transformer.

  7. Support Mobile and Distributed Applications with Named Data Networking

    E-Print Network [OSTI]

    Zhu, Zhenkai

    2013-01-01

    protocols for PDAs and mobile devices. ” IEEE Network, 16(does offer users and mobile devices more flexibility andawareness in the mobile devices (and thus the legacy devices

  8. Field test of the wavelength-saving quantum key distribution network

    E-Print Network [OSTI]

    Shuang Wang; Wei Chen; Zhen-Qiang Yin; Yang Zhang; Tao Zhang; Hong-Wei Li; Fang-Xing Xu; Zheng Zhou; Yang Yang; Da-Jun Huang; Li-Jun Zhang; Fang-Yi Li; Dong Liu; Yong-Gang Wang; Guang-Can Guo; Zheng-Fu Han

    2012-03-20

    We propose a wavelength-saving topology of quantum key distribution(QKD) network based on passive optical elements, and report the field test of this network on the commercial telecom optical fiber. In this network, 5 nodes are supported with 2 wavelengths, and every two nodes can share secure keys directly at the same time. All QKD links in the network operate at the frequency of 20 MHz. We also characterized the insertion loss and crosstalk effects on the point-to-point QKD system after introducing this QKD network.

  9. Distributed Symmetric Function Computation in Noisy Wireless Sensor Networks

    E-Print Network [OSTI]

    Srikant, Rayadurgam

    . The network has a special node called the fusion center whose goal is to compute a symmetric function of these measurements. The problem studied is to minimize the total transmission energy used by the network when, and that each sensor uses r units of energy to transmit each bit, where r is the transmission range

  10. DIFS: A Distributed Index for Features in Sensor Networks

    E-Print Network [OSTI]

    Govindan, Ramesh

    of nodes in such networks is energy. Nodes are expected to be long­lived (deployed not for hours minimize energy use. The primary energy consumer in such systems is radio transmission. For one scenario and amount of data produced increase. Consequently, in energy­constrained sensor networks it may be necessary

  11. On Distributed Network Resource Allocation Andrea Werneck Richa

    E-Print Network [OSTI]

    ­ domized algorithm, shared object, wide­area network, hierarchical model, expected cost, packet routing for a class of cost functions that captures the hierarchical structure of most wide­area networks. Second, we for Finding O(Congestion+Dilation) Packet Routing Sched­ ules 51 3.1 Introduction

  12. On Dual Convergence of the Distributed Newton Method for Network Utility Maximization

    E-Print Network [OSTI]

    Wei, Ermin

    The existing distributed algorithms for Network Utility Maximization (NUM) problems mostly rely on dual decomposition and first-order (gradient or subgradient) methods, which suffer from slow rate of convergence. Recent ...

  13. A phased approach to distribution network optimization given incremental supply chain change

    E-Print Network [OSTI]

    Riechel, Patrick

    2012-01-01

    This thesis addresses the question of how to optimize a distribution network when the supply chain has undergone an incremental change. A case study is presented for Company A, a major global biotechnology company that ...

  14. Topic 7 : Smart Grid Privacy and Security 1Networking and Distributed Systems

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Topic 7 : Smart Grid Privacy and Security 1Networking and Distributed Systems Department Tech UniversityCommunications and Control in Smart Grid 2 · Smart Meter Privacy · Concerns · Possible Solutions · Smart Grid Security · Load Altering Attacks · False Data Injection Attacks · Impact

  15. Optimal location of cross-docking centers for a distribution network in Argentina

    E-Print Network [OSTI]

    Dobrusky, Fernando G. (Fernando Gabriel), 1971-

    2003-01-01

    The objective of this thesis is to define an optimal distribution network for Argentina using Cross Docking Centers. The products to be delivered are in a Central Warehouse in Buenos Aires, the main city and port of ...

  16. Water Distribution System Monitoring and Decision Support Using a Wireless Sensor Network

    E-Print Network [OSTI]

    Allen, Michael

    Water distribution systems comprise labyrinthine networks of pipes, often in poor states of repair, that are buried beneath our city streets and relatively inaccessible. Engineers who manage these systems need reliable ...

  17. Network Stability under Alpha Fair Bandwidth Allocation with General File Size Distribution

    E-Print Network [OSTI]

    fair bandwidth allocation, with any positive alpha parameter, a Lyapunov function is constructed1 Network Stability under Alpha Fair Bandwidth Allocation with General File Size Distribution. Cornell University, Ithaca, NY. Swinburne University of Technology, Australia. Abstract--Rate allocation

  18. Improving Distributed Virtual Network Embedding with O#ine Optimization # Samir Tazine Ibrahim Matta +

    E-Print Network [OSTI]

    Improving Distributed Virtual Network Embedding with O#ine Optimization # Samir Tazine Ibrahim role in the future. To provide such solutions e#ectively, internet provi­ ders face the problem of optimizing the allocation of virtual networks on their physical resources. Since this problem is known

  19. Improving Distributed Virtual Network Embedding with Offline Optimization Samir Tazine Ibrahim Matta

    E-Print Network [OSTI]

    Improving Distributed Virtual Network Embedding with Offline Optimization Samir Tazine Ibrahim role in the future. To provide such solutions effectively, internet provi- ders face the problem of optimizing the allocation of virtual networks on their physical resources. Since this problem is known

  20. Distributed Throughput Optimization for ZigBee Cluster-Tree Networks

    E-Print Network [OSTI]

    Zhuang, Weihua

    1 Distributed Throughput Optimization for ZigBee Cluster-Tree Networks Yu-Kai Huang§, Ai-Chun Pang connectivity in inexpensive, portable, and mobile devices. Among the well-known ZigBee topologies, ZigBee will be generated. However, the restricted routing of a ZigBee cluster- tree network may not be able to provide

  1. Use of Meta-Level Control for Coordination in a Distributed Problem-Solving Network

    E-Print Network [OSTI]

    Corkill, Daniel

    Use of Meta-Level Control for Coordination in a Distributed Problem-Solving Network Daniel D problem-solving networks provide an interesting application area for meta-level con- trol through the use node making sophisticated local decisions that balance its own perceptions of appropriate problem-solving

  2. AN ASYMPTOTICALLY OPTIMAL APPROACH TO THE DISTRIBUTED ADAPTIVE TRANSMIT BEAMFORMING IN WIRELESS SENSOR NETWORKS

    E-Print Network [OSTI]

    Beigl, Michael

    the plants on a field. As the transmission power of each single node is too weak to reach the distant]. A solution to synchronize carrier signals of distributed wireless nodes is virtual/cooperative MIMO for wireless sen- sor networks [1, 2, 3]. In virtual MIMO for wireless sensor networks, single antenna nodes

  3. Multiagent Reinforcement Learning in a Distributed Sensor Network with Indirect Feedback

    E-Print Network [OSTI]

    Tumer, Kagan

    network operating in a model power plant. · Show that the average difference reward meets real- world accurate sensor measurements are crucial in order for power plants to effectively operate, as well while their power increases, distributed sensor networks become a more attractive option

  4. Distributed Topology Control for Power Efficient Operation in Multihop Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    of a wireless network that is operating on battery power is limited by the capacity of its energy sourceDistributed Topology Control for Power Efficient Operation in Multihop Wireless Ad Hoc Networks of wireless multihop ad hoc net- works can be controlled by varying the transmission power of each node. We

  5. Outage Detection in Power Distribution Networks with Optimally-Deployed Power Flow Sensors

    E-Print Network [OSTI]

    Zhao, Yue

    distribution networks. As society becomes more dependent on electric power, the economic and societal costs due sensor at the substation [2]. In networks This research was supported in part by the DTRA under Grant a single digital transient recording device at the substation, fault location and diagnosis systems have

  6. Degree distribution of position-dependent ball-passing networks in football games

    E-Print Network [OSTI]

    Narizuka, Takuma; Yamazaki, Yoshihiro

    2015-01-01

    We propose a simple stochastic model describing the position-dependent ball-passing network in football games. In this network, a player on a certain area in the divided fields is a node, and a pass between two nodes corresponds to an edge. Our model is characterized by the consecutive choice of a node dependent on its intrinsic fitness. We derive the explicit expression of the degree distribution, and find that the derived distribution reproduces the real data quit well.

  7. Research Study on Convex Optimization of Power Distribution Networks

    E-Print Network [OSTI]

    Lavaei, Javad

    . Background The integration of renewable energy source, or distributed energy resources and its advanced accurately predicted from historical data. And each generator (renewable energy resource) in a distribution structure and functionality. Acting as a small-scale generator, distributed energy resources usually connect

  8. Distributed Newton-type algorithms for network resource allocation

    E-Print Network [OSTI]

    Wei, Ermin

    2010-01-01

    Most of today's communication networks are large-scale and comprise of agents with local information and heterogeneous preferences, making centralized control and coordination impractical. This motivated much interest in ...

  9. Hindawi Publishing Corporation International Journal of Distributed Sensor Networks

    E-Print Network [OSTI]

    Calgary, University of

    be applied to other ISM band protocols such as 802.15.4 (Zigbee) and 802.15.1 (Bluetooth). 1. Introduction localization for wireless networks operating under 2.4 GHz ISM band protocols such as Blue- tooth, Zigbee

  10. A Greedy Distributed Time Synchronization Algorithm for Wireless Sensor Networks

    E-Print Network [OSTI]

    Tam, Vincent W. L.

    synchronizations performed. I. INTRODUCTION With the advance in various enabling technologies like Micro-Electro-Mechanical System (MEMS), signal process- ing and wireless communication, wireless sensor networks (WSNs) have drawn

  11. Characterizing short-term stability for Boolean networks over any distribution of transfer functions

    E-Print Network [OSTI]

    C. Seshadhri; Andrew M. Smith; Yevgeniy Vorobeychik; Jackson Mayo; Robert C. Armstrong

    2014-09-15

    We present a characterization of short-term stability of random Boolean networks under \\emph{arbitrary} distributions of transfer functions. Given any distribution of transfer functions for a random Boolean network, we present a formula that decides whether short-term chaos (damage spreading) will happen. We provide a formal proof for this formula, and empirically show that its predictions are accurate. Previous work only works for special cases of balanced families. It has been observed that these characterizations fail for unbalanced families, yet such families are widespread in real biological networks.

  12. Design and implementation of an integrated network management system for TCP/IP-based distributed networks 

    E-Print Network [OSTI]

    Patel, Samir K.

    1993-01-01

    in designing of tools for network management. Various workstation vendors have developed such tools for their window systems, but many of the tools are not compatible for other systems. The X Window System, however, provides hardware independent and network...

  13. Channel-aware Distributed Classification in Wireless Sensor Networks

    E-Print Network [OSTI]

    Valenti, Matthew C.

    University, Morgantown, WV, USA 2011 SPIE Defense, Security, and Sensing Signal Processing, Sensor Fusion, and Problem Statement 2 System Model of Our Distributed Classification WSN 3 Fusion Rule Derivation 4 Distributed Classification WSN 3 Fusion Rule Derivation 4 Numerical Analysis 5 Conclusions M. Fanaei et al

  14. Networked Loads in the Distribution Grid Zhifang Wang, Xiao Li, Vishak Muthukumar, Anna Scaglione, Sean Peisert, Chuck McParland

    E-Print Network [OSTI]

    Peisert, Sean

    that they can be accessed remotely, and the network in these plants is structured according to the SCADA model examine a prototypical instance of SCADA network in the distribution network that handles central cooling (PLCs), electrical meters, and networks that deliver data to and from servers that are part of a SCADA

  15. Distributed Problem Solving in Sensor Networks Weixiong Zhang

    E-Print Network [OSTI]

    Zhang, Weixiong

    , resource allocation 1. SENSOR NETWORKS In recent years, the technology of micro-electro-mechanical sys- tems (MEMS) has made rapid advances. Various smart devices, such as sensors and actuators with some-world applications [4, 5]. To meet the needs of vast de- mands of MEMS in various application domains

  16. Task Allocation for Distributed Multimedia Processing on Wirelessly Networked Handheld

    E-Print Network [OSTI]

    Li, Zhiyuan

    the server and the handheld. We show that, to minimize battery consumption on the handheld, a trade- o#11 the battery life. In addition to that, handheld devices have relatively limited processing power and memory network. For example, replaying downloaded images, sounds, or videos from server to a handheld requires

  17. DIFS: A Distributed Index for Features in Sensor Networks

    E-Print Network [OSTI]

    Gao, Jie

    . The primary energy consumer in such systems is radio transmission. For one scenario, Pottie and Kaiser explain for complete flexibility in processing the data, it incurs signifi- cant energy expenditure to send every, in energy-constrained sensor networks it may be necessary to store data locally at or near the location

  18. Key Distribution Mechanisms for Wireless Sensor Networks: a Survey

    E-Print Network [OSTI]

    Bystroff, Chris

    . A wireless sensor network (WSN) is composed of large number of sensor nodes with limited power, computation of the nodes increases. If the environment is uncontrolled or the WSN is very large, deployment has to be per] and [Zou and Chakrabarty 2003], this may not be possible for a large scale WSN. Security in WSN has six

  19. Optimal Demand Response in DC Distribution Networks Hamed Mohsenian-Rad, Member, IEEE and Ali Davoudi, Member, IEEE

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Optimal Demand Response in DC Distribution Networks Hamed Mohsenian-Rad, Member, IEEE and Ali first present an optimization-based foundation for demand response in DC distribution networks. Then, we devise a pricing mechanism to enforce optimal demand response in a distributed fashion. Simulation

  20. Distributed Problem Solving in Geometrically-Structured Constraint Networks

    E-Print Network [OSTI]

    Mailler, Roger

    ) Roger Mailler University of Tulsa 800 South Tucker Dr Tulsa, Oklahoma mailler@utulsa.edu Huimin Zheng University of Tulsa 800 South Tucker Dr Tulsa, Oklahoma huimin-zheng@utulsa.com ABSTRACT Distributed

  1. Inventory positioning for a multi-echelon distribution network

    E-Print Network [OSTI]

    Avari, Deepak

    2009-01-01

    This thesis presents a framework for deciding which products to centralize in a regional distribution center and which products to store decentralized close to the customer sites, for each facility in a multi-echelon ...

  2. Electricity Distribution Networks: Investment and Regulation, and Uncertain Demand

    E-Print Network [OSTI]

    Jamasb, Tooraj; Marantes, Cristiano

    2011-01-31

    . Cost savings can be achieved either in operation and maintenance (Opex) and capital expenditures (Capex). Evaluation of efficiency potential in Capex is a challenging task. The main difficulty in incentivising investments is in the discrepancy... by which the DNOs are rewarded by higher rate of returns if their actual investments are lower than the predicted levels (Ofgem, 2004). Collectively, these separate incentive schemes for Opex, Capex, quality of service, and network energy losses amount...

  3. Fibre optical measuring network based on quasi-distributed amplitude sensors for detecting deformation loads

    SciTech Connect (OSTI)

    Kul'chin, Yurii N; Kolchinskiy, V A; Kamenev, O T; Petrov, Yu S

    2013-02-28

    A new design of a sensitive element for a fibre optical sensor of deformation loads is proposed. A distributed fibre optical measuring network, aimed at determining both the load application point and the load mass, has been developed based on these elements. It is shown that neural network methods of data processing make it possible to combine quasi-distributed amplitude sensors of different types into a unified network. The results of the experimental study of a breadboard of a fibre optical measuring network are reported, which demonstrate successful reconstruction of the trajectory of a moving object (load) with a spatial resolution of 8 cm, as well as the load mass in the range of 1 - 10 kg with a sensitivity of 0.043 kg{sup -1}. (laser optics 2012)

  4. Response time distributions and network perturbation into product-form

    E-Print Network [OSTI]

    Imperial College, London

    to deriving corresponding response time distributions. The Reversed Compound Agent Theo- rem (RCAT) is used in both the forward and reversed processes. Therefore if the reversed process is known, each node-sojourn time can be taken from either process. In particular, the reversed process can be used for the first

  5. Dynamic server selection using fuzzy inference in content distribution networks

    E-Print Network [OSTI]

    Shen, Xuemin "Sherman"

    been designed and deployed to distribute content to different cache servers, and to transparently systems. An appropriate server should be selected by taking estimated user location, measured round is proposed. The scheme selects appropriate servers based on partial round-trip time measurements

  6. A distributed scientific visualization paradigm for heterogeneous computer networks 

    E-Print Network [OSTI]

    Lenox, Mark Wayne

    1990-01-01

    hardware product called VX/MVX that uses multiple processors to perform visualization tasks [33]. It is not a heterogeneous distributed environment, however, in that all the processors are located within a single Sun workstation, as shown below in figure... pipeline, and minimization of supercomputer re- source demand are all design features of apE [17]. apE, which stands for animation production Environment, abstracts data in the form of the FLUX language [17]. FLUX has built in capabilities that make...

  7. Distributed Detection and Localization of Events in Large Ad Hoc Wireless Sensor Networks

    E-Print Network [OSTI]

    Kumar, Anurag

    are application­specific networks that com- prise a large number of tiny, energy­limited, smart sensor devices by . This formulation is motivated by the change detection/isolation framework introduced by Nikiforov [6]. We extend decisions of ALL toggle rapidly. Motivated by this fact, we propose a distributed change detection

  8. Voltage Stability and Frequency Synchronization of Weak Power Distribution Networks with Inverter-Based

    E-Print Network [OSTI]

    Lemmon, Michael

    a part of microgrids, are incorporated to improve power quality and reliability when disruptions happen of microgrids [13], together with oth- er generation, storage and load units. These microgrid- s are installedVoltage Stability and Frequency Synchronization of Weak Power Distribution Networks with Inverter

  9. Performance and Fiscal Analysis of Distributed Sensor Networks in a Power Plant

    E-Print Network [OSTI]

    Tumer, Kagan

    Performance and Fiscal Analysis of Distributed Sensor Networks in a Power Plant Mitchell Colby University 204 Rogers Hall Corvallis, OR 97331 kagan.tumer@oregonstate.edu ABSTRACT As power plants become power plant, showing that system parameters may be accurately measured and tracked more effectively than

  10. Probabilistic Modelling of Plug-in Hybrid Electric Vehicle Impacts on Distribution Networks in

    E-Print Network [OSTI]

    Victoria, University of

    emission rates, especially in a low carbon intensive generation mixture such as that of British Columbia. This research aims to investigate the incremental impacts to distribution networks in British Columbia imposed in British Columbia by Liam Kelly B.A.Sc, University of Waterloo, 2005 A Thesis Submitted in Partial

  11. Weak Data Secrecy via Obfuscation in Network Coding Based Content Distribution

    E-Print Network [OSTI]

    Battiti, Roberto

    Weak Data Secrecy via Obfuscation in Network Coding Based Content Distribution Roberto G. Cascella of California Los Angeles, 3732F Boelter Hall, CA 90095 Los Angeles Email: {cascella, crispo, battiti in terms of error/loss protection and faster dissemination at the cost of exposing the data to intermediate

  12. Distributed Opportunistic Scheduling for Wireless Networks Powered by Renewable Energy Sources

    E-Print Network [OSTI]

    Zhang, Junshan

    Distributed Opportunistic Scheduling for Wireless Networks Powered by Renewable Energy Sources Hang with mul- tiple transmitter-receiver pairs, in which all transmitters are ca- pable of harvesting renewable Conventional wireless communication devices are usually powered by batteries that can provide stable energy

  13. Aalborg Universitet Three-Phase Unbalanced Load Flow Tool for Distribution Networks

    E-Print Network [OSTI]

    Sera, Dezso

    -consumption and power quality are two essential targets on the overall electrical power system to be continuously Workshop on Integration of Solar Power Systems Publication date: 2012 Document Version Preprint (usually for Distribution Networks. In Proceedings of the 2nd International Workshop on Integration of Solar Power Systems

  14. Transient Over-Voltage Mitigation and its Prevention in Secondary Distribution Networks with

    E-Print Network [OSTI]

    of Central Florida 1679 Clearlake Road Cocoa, FL 32922 E-mail: block@fsec.ucf.edu Purchase Order Number. This document is a project report issued and disseminated under the sponsorship of the University of Central generation (DG) units within secondary distribution networks, such as photovoltaic power stations or rooftop

  15. On Computing Mobile Agent Routes for Data Fusion in Distributed Sensor Networks

    E-Print Network [OSTI]

    Chakrabarty, Krishnendu

    such as adequate detection energy for target detection or tracking. In conventional fusion architectures, allOn Computing Mobile Agent Routes for Data Fusion in Distributed Sensor Networks Qishi Wu, Member strength and inversely proportional to the path loss and energy consumption. We show this problem to be NP

  16. Lyapunov functions, stationary distributions, and non-equilibrium potential for chemical reaction networks

    E-Print Network [OSTI]

    Lyapunov functions, stationary distributions, and non-equilibrium potential for chemical reaction reac- tion systems and Lyapunov functions for their deterministic counterparts. Specifically, we derive the well known Lyapunov function of chemical reaction network theory as a scaling limit of the non

  17. A Distributed Scheduling Algorithm with QoS Provisions in Multi-Hop Wireless Mesh Networks

    E-Print Network [OSTI]

    Leung, Kin K.

    in urban, suburban, and rural environments. A WMN is usually composed of static wireless nodes/mesh routers/Internet gateway to the internet but also as a wireless router able to relay packets from other nodes withoutA Distributed Scheduling Algorithm with QoS Provisions in Multi-Hop Wireless Mesh Networks Chi

  18. STUDY OF CLOUD LIFETIME EFFECTS USING THE SGP HETEROGENEOUS DISTRIBUTED RADAR NETWORK: PRELIMINARY CONSIDERATIONS

    E-Print Network [OSTI]

    STUDY OF CLOUD LIFETIME EFFECTS USING THE SGP HETEROGENEOUS DISTRIBUTED RADAR NETWORK: PRELIMINARY-dimensional morphology and life cycle of clouds. Detailing key cloud processes as they transit from the formation stage to precipitation onset and cloud dissipation is critical towards establishing uncertainties in climate models

  19. Distribution network use-of-system charges under high penetration of distributed energy resources

    E-Print Network [OSTI]

    Bharatkumar, Ashwini

    2015-01-01

    Growing integration of distributed energy resources (DER) presents the electric power sector with the potential for signicant changes to technical operations, business models, and industry structure. New physical components, ...

  20. AN ECONOMICS-BASED POWER-AWARE PROTOCOL FOR COMPUTATION DISTRIBUTION IN MOBILE AD-HOC NETWORKS

    E-Print Network [OSTI]

    Shang, Li

    AN ECONOMICS-BASED POWER-AWARE PROTOCOL FOR COMPUTATION DISTRIBUTION IN MOBILE AD-HOC NETWORKS Li, Princeton, NJ 08544, USA ABSTRACT In this paper, we present a new economics-based power- aware protocol, called the distributed economic subcontracting protocol (DESP), that dynamically distributes task

  1. Investment and Efficiency under Incentive Regulation: The Case of the Norwegian Electricity Distribution Networks

    E-Print Network [OSTI]

    Poudineh, Rahmatallah; Jamasb, Tooraj

    2013-04-01

    and competitive businesses (NVE, 2010). EPRG 1306 4 At the early years of the reform, there were approximately 230 distribution networks and 70 generation units in Norway. The high number of utilities reflects the dispersed nature of hydroelectric resources... from their efficiency level. The investment increase can be continued until efficiency after investment reduces to no impact efficiency, in which state, some form of optimality will be achieved. On the other hand, those firms that their efficiency...

  2. The systems engineering of a network-centric distributed intelligent system of systems for robust human behavior classifications

    E-Print Network [OSTI]

    Goshorn, Deborah Ellen

    2010-01-01

    plemented includes an intelligent sensor network, requiredto create an intelligent sensor, there is the ability ofwithin a single intelligent sensor. Choosing the underlying

  3. A Spatio-Temporal exploratory analysis of pipe-failure incidents in the Water Distribution Network of Limassol, Cyprus 

    E-Print Network [OSTI]

    Gagatsis, Anastasios

    2011-08-10

    This paper presents the first attempt to the use of Geographic Information Systems technology in the Water Distribution Networks of Cyprus. A variety of exploratory, statistical and visualization techniques were used in ...

  4. Energy and Bandwidth-Efficient Key Distribution in Wireless Ad-Hoc Networks: A Cross-Layer

    E-Print Network [OSTI]

    Poovendran, Radha

    ) multicast group (MG) update messages, and (d) average update energy. For each metric, we formulate1 Energy and Bandwidth-Efficient Key Distribution in Wireless Ad-Hoc Networks: A Cross, and GC transmissions, while significantly reducing the energy and bandwidth consumption of the network

  5. Economic regulation of electricity distribution utilities under high penetration of distributed energy resources : applying an incentive compatible menu of contracts, reference network model and uncertainty mechanisms

    E-Print Network [OSTI]

    Jenkins, Jesse D. (Jesse David)

    2014-01-01

    Ongoing changes in the use and management of electricity distribution systems - including the proliferation of distributed energy resources, smart grid technologies (i.e., advanced power electronics and information and ...

  6. Dynamic and Auto Responsive Solution for Distributed Denial-of-Service Attacks Detection in ISP Network

    E-Print Network [OSTI]

    Gupta, B B; Misra, Manoj

    2012-01-01

    Denial of service (DoS) attacks and more particularly the distributed ones (DDoS) are one of the latest threat and pose a grave danger to users, organizations and infrastructures of the Internet. Several schemes have been proposed on how to detect some of these attacks, but they suffer from a range of problems, some of them being impractical and others not being effective against these attacks. This paper reports the design principles and evaluation results of our proposed framework that autonomously detects and accurately characterizes a wide range of flooding DDoS attacks in ISP network. Attacks are detected by the constant monitoring of propagation of abrupt traffic changes inside ISP network. For this, a newly designed flow-volume based approach (FVBA) is used to construct profile of the traffic normally seen in the network, and identify anomalies whenever traffic goes out of profile. Consideration of varying tolerance factors make proposed detection system scalable to the varying network conditions and a...

  7. Multi-party Agile Quantum Key Distribution Network with a Broadband Fiber-based Entangled Source

    E-Print Network [OSTI]

    E. Y. Zhu; C. Corbari; A. V. Gladyshev; P. G. Kazansky; H. K. Lo; L. Qian

    2015-06-12

    A reconfigurable, multi-party quantum key distribution scheme is experimentally demonstrated by utilizing a poled fiber-based source of broadband polarization-entangled photon pairs and dense wavelength-division multiplexing (DWDM). The large bandwidth (> 90 nm centered about 1555 nm) and highly spectrally-correlated nature of the entangled source is exploited to allow for the generation of more than 25 frequency-conjugate entangled pairs when aligned to the standard 200-GHz ITU grid. Such a network can serve more than 50 users simultaneously, allowing any one user on the network to establish a QKD link with any other user through wavelength-selective switching. The entangled pairs are delivered over 40 km of actual fiber (equivalent to 120 km of fiber based on channel-loss experienced), and a secure key rate of more than 20 bits/s per bi-party is observed.

  8. Flow distribution analysis on the cooling tube network of ITER thermal shield

    SciTech Connect (OSTI)

    Nam, Kwanwoo; Chung, Wooho; Noh, Chang Hyun; Kang, Dong Kwon; Kang, Kyoung-O; Ahn, Hee Jae; Lee, Hyeon Gon

    2014-01-29

    Thermal shield (TS) is to be installed between the vacuum vessel or the cryostat and the magnets in ITER tokamak to reduce the thermal radiation load to the magnets operating at 4.2K. The TS is cooled by pressurized helium gas at the inlet temperature of 80K. The cooling tube is welded on the TS panel surface and the composed flow network of the TS cooling tubes is complex. The flow rate in each panel should be matched to the thermal design value for effective radiation shielding. This paper presents one dimensional analysis on the flow distribution of cooling tube network for the ITER TS. The hydraulic cooling tube network is modeled by an electrical analogy. Only the cooling tube on the TS surface and its connecting pipe from the manifold are considered in the analysis model. Considering the frictional factor and the local loss in the cooling tube, the hydraulic resistance is expressed as a linear function with respect to mass flow rate. Sub-circuits in the TS are analyzed separately because each circuit is controlled by its own control valve independently. It is found that flow rates in some panels are insufficient compared with the design values. In order to improve the flow distribution, two kinds of design modifications are proposed. The first one is to connect the tubes of the adjacent panels. This will increase the resistance of the tube on the panel where the flow rate is excessive. The other design suggestion is that an orifice is installed at the exit of tube routing where the flow rate is to be reduced. The analysis for the design suggestions shows that the flow mal-distribution is improved significantly.

  9. Effects on electrical distribution networks of dispersed power generation at high levels of connection penetration

    SciTech Connect (OSTI)

    Longrigg, P.

    1983-07-01

    The advent and deployment of significant levels of photovoltaic and wind energy generation in the spatially dispersed mode (i.e., residential and intermediate load centers) may have deleterious effects upon existing protective relay equipment and its time-current coordination on radial distribution circuits to which power conditioning equipment may be connected for power sell-back purposes. The problems that may arise involve harmonic injection from power conditioning inverters that can affect protective relays and cause excessive voltage and current from induced series and parallel resonances on feeders and connected passive equipment. Voltage regulation, var requirements, and consumer metering can also be affected by this type of dispersed generation. The creation of islands of supply is also possible, particularly on rural supply systems. This paper deals mainly with the effects of harmonics and short-circuit currents from wind energy conversion systems (WECS) and photovoltaic (PV) systems upon the operating characteristics of distribution networks and relays and other protective equipment designed to ensure the safety and supply integrity of electrical utility networks. Traditionally, electrical supply networks have been designed for one-way power flow-from generation to load, with a balance maintained between the two by means of automatic generation and load-frequency controls. Dispersed generation, from renewables like WECS or PV or from nonrenewable resources, can change traditional power flow. These changes must be dealt with effectively if renewable energy resources are to be integrated into the utility distribution system. This paper gives insight into these problems and proposes some solutions.

  10. Mixed random walks with a trap in scale-free networks including nearest-neighbor and next-nearest-neighbor jumps

    E-Print Network [OSTI]

    Zhang, Zhongzhi; Sheng, Yibin

    2015-01-01

    Random walks including non-nearest-neighbor jumps appear in many real situations such as the diffusion of adatoms and have found numerous applications including PageRank search algorithm, however, related theoretical results are much less for this dynamical process. In this paper, we present a study of mixed random walks in a family of fractal scale-free networks, where both nearest-neighbor and next-nearest-neighbor jumps are included. We focus on trapping problem in the network family, which is a particular case of random walks with a perfect trap fixed at the central high-degree node. We derive analytical expressions for the average trapping time (ATT), a quantitative indicator measuring the efficiency of the trapping process, by using two different methods, the results of which are consistent with each other. Furthermore, we analytically determine all the eigenvalues and their multiplicities for the fundamental matrix characterizing the dynamical process. Our results show that although next-nearest-neighb...

  11. Abstract-The distribution network reconfiguration is a process that consists of changing the status of the

    E-Print Network [OSTI]

    Lai, Hong-jian

    and constrained nonlinear mixed integer optimization problem [4][7][8]. With the evolution to the smart grid, more Edison (SCE). Index Terms- Smart Distribution Network, Fault Reconfiguration, Graph Theory, Multi is a very important tool to operate the distribution system at a minimum cost and improve the system

  12. PEV-based P-Q Control in Line Distribution Networks with High Requirement for Reactive Power Compensation

    E-Print Network [OSTI]

    Huang, Jianwei

    impact of distribution level wind turbines. Our design is based on a nonlinear power flow analysis1 PEV-based P-Q Control in Line Distribution Networks with High Requirement for Reactive Power the electric grid, both as a potential source of energy storage and as a means to improve power quality

  13. DECENTRALIZED CONTROL ARCHITECTURE FOR COUPLING MICROGRIDS INTO DISTRIBUTION NETWORKS 1 Task 1: Coupling Low-Voltage Microgrids into

    E-Print Network [OSTI]

    Lemmon, Michael

    DECENTRALIZED CONTROL ARCHITECTURE FOR COUPLING MICROGRIDS INTO DISTRIBUTION NETWORKS 1 Task 1: Coupling Low-Voltage Microgrids into Mid-Voltage Distribution Systems Zhao Wang, Student Member, IEEE-voltage (LV) microgrids. At the same time, reactive power is dispatched coordinatively so that voltage

  14. Abstract--Improvements in transmission and distribution networks can be noticed in most countries that had their system

    E-Print Network [OSTI]

    Morton, David

    , the National Electricity Regulatory Agency has established that the monthly amount of transmission system usage1 Abstract--Improvements in transmission and distribution networks can be noticed in most one of the biggest challenges is the transmission and distribution open access. In Brazil

  15. identification Distributed

    E-Print Network [OSTI]

    Schenato, Luca

    Networked Control Systems Clock Sync Channel identification in WSN Distributed control of Smart. Sandro Zampieri #12;Networked Control Systems Clock Sync Channel identification in WSN Distributed Systems Clock Sync Channel identification in WSN Distributed control of Smart Grids Conclusions Issues

  16. Predicate Signaling in Distributed Sensor Networks Agostino Capponi K. Mani Chandy Ibrahim Fatkullin

    E-Print Network [OSTI]

    that respond to conditions include those that detect and intercept intruders, detect and warn when a tsunami. Problem Overview In this paper we study mechanisms for reducing commu- nication in distributed systems that obtain information from sensors and other sources of data, estimate the system state by processing

  17. An Electricity Trade Model for Multiple Power Distribution Networks in Smart Energy Systems

    E-Print Network [OSTI]

    Pedram, Massoud

    of the presented solutions. I. INTRODUCTION Energy efficiency optimization has drawn significant attention], [2]. Smart energy systems are thus introduced which aim at increasing the efficiency of both energy generation and distribution. The state-of-the-art smart energy systems, including resource allocation

  18. Energy evolution of the moments of the hadron distribution in QCD jets including NNLL resummation and NLO running-coupling corrections

    E-Print Network [OSTI]

    Redamy Perez-Ramos; David d'Enterria

    2014-08-15

    The moments of the single inclusive momentum distribution of hadrons in QCD jets, are studied in the next-to-modified-leading-log approximation (NMLLA) including next-to-leading-order (NLO) corrections to the alpha_s strong coupling. The evolution equations are solved using a distorted Gaussian parametrisation, which successfully reproduces the spectrum of charged hadrons of jets measured in e+e- collisions. The energy dependencies of the maximum peak, multiplicity, width, kurtosis and skewness of the jet hadron distribution are computed analytically. Comparisons of all the existing jet data measured in e+e- collisions in the range sqrt(s)~2-200 GeV to the NMLLA+NLO* predictions allow one to extract a value of the QCD parameter Lambda_QCD, and associated two-loop coupling constant at the Z resonance alpha_s(m_Z^2)= 0.1195 +/- 0.0022, in excellent numerical agreement with the current world average obtained using other methods.

  19. Method and apparatus for distributed intrusion protection system for ultra high bandwidth networks

    DOE Patents [OSTI]

    Goranson, Craig A.; Burnette, John R.; Greitzer, Frank L.; McMillan, Bryan H.

    2013-10-15

    A method for providing security to a network having a data stream with a plurality of portions of data, each having differing levels of sensitivity. The data stream is interrogated to determine the presence of predetermined characteristics associated with at least one of the portions of data within the data stream. At least one of the portions of data is then characterized, based upon the portion of data exhibiting a predetermined combination of characteristics, wherein the predetermined combination of characteristics is related to the sensitivity of the portion of data. The portions of the data stream are then distributed into a plurality of different channels, each of the channels associated with different level of sensitivity.

  20. A Distributed Medium Access Control Scheme for a Large Network of Wireless Routers

    E-Print Network [OSTI]

    Zhao, Bin; Hua, Yingbo

    2008-01-01

    for a Large Network of Wireless Routers Bin Zhao and Yingboof a large network of wireless routers critically depends onLarge network of wireless routers, medium access control,

  1. Distributed Flow Control using Embedded Sensor-Actuator Networks for the Reduction of Combined Sewer Overflow (CSO) Events

    E-Print Network [OSTI]

    Lemmon, Michael

    Sewer Overflow (CSO) Events Pu Wan, Michael D. Lemmon Abstract-- This paper studies the distributed the frequency of combined sewer overflow (CSO) events in city sewer systems. This is an important environmental microprocessor controlled sensors and actuators directly into the sewer network. These embedded processors

  2. Distributed Seeking of Nash Equilibria in Mobile Sensor Networks Milos S. Stankovic, Karl Henrik Johansson and Dusan M. Stipanovic

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Distributed Seeking of Nash Equilibria in Mobile Sensor Networks Milos S. Stankovi´c, Karl Henrik convergence to a Nash equilibrium based on minimal information about the underlying noncooperative game. We, to a Nash equilibrium. We discuss how the proposed algorithm can be adopted for solving coordination

  3. Topic 4: Demand Response A.H. MohsenianRad (U of T) 1Networking and Distributed Systems

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Topic 4: Demand Response A.H. MohsenianRad (U of T) 1Networking and Distributed Systems Department;Definition of Demand Response Dr. Hamed Mohsenian-Rad Texas Tech UniversityCommunications and Control in Smart Grid · According to the U.S. Department of Energy: Demand response (DR) is defined as changes

  4. Topic 3: Smart Grid Communications A.H. MohsenianRad (U of T) 1Networking and Distributed Systems

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Topic 3: Smart Grid Communications A.H. MohsenianRad (U of T) 1Networking and Distributed Systems Reference Model for Smart Grid Dr. Hamed Mohsenian-Rad Texas Tech UniversityCommunications and Control in Smart Grid 2 · Each domain involves its own actors and applications. · Interactions across 7 Smart Grid

  5. Energy and Bandwidth-Efficient Key Distribution in Wireless Ad-Hoc Networks: A Cross-Layer

    E-Print Network [OSTI]

    Lazos, Loukas

    messages, and (d) average update energy. For each metric, we formulate an optimization problem and show1 Energy and Bandwidth-Efficient Key Distribution in Wireless Ad-Hoc Networks: A Cross metrics: (a) member key storage, (b) group controller (GC) transmissions, (c) multicast group (MG) update

  6. Staying FIT: Efficient Load Shedding Techniques for Distributed Stream Processing

    E-Print Network [OSTI]

    . Bottlenecks slow down processing and network transmission, and cause delayed outputs. Load management has been. Common load management techniques include adaptive load distribution, admis- sion control, and load

  7. Analysis of microelectronic power distribution networks and exploration of 3D ICs

    E-Print Network [OSTI]

    Hu, Xiang

    2012-01-01

    A. Distributed Power Grid Model . . . . . . . .B. Currentimpedances between lumped model and distributed power gridmodel and distributed power grid model with inductance

  8. Reference Models and Incentive Regulation of Electricity Distribution Networks: An Evaluation of Sweden’s Network Performance Assessment Model (NPAM)

    E-Print Network [OSTI]

    Jamasb, Tooraj; Pollitt, Michael G.

    (Capex), quality of service, and network losses in a single model. Aggregation of these important elements into a single model has useful efficiency and incentive properties. Firms can adjust their inputs and outputs more efficiently by weighting... long-term benchmarking model, the NPAM incorporates the main inputs and outputs of regulatory concern such as operating and maintenance expenditures (Opex), capital expenditures (Capex), service quality, and network energy losses. It is generally...

  9. Passive damping of beam vibrations through distributed electric networks and piezoelectric transducers: prototype design and experimental validation

    E-Print Network [OSTI]

    F. dell'Isola; C. Maurini; M. Porfiri

    2010-07-12

    The aim of this work is two-fold: to design devices for passive electric damping of structural vibrations by distributed piezoelectric transducers and electric networks, and to experimentally validate the effectiveness of such a damping concept. Two different electric networks are employed, namely a purely resistive network and an inductive-resistive one. The presented devices can be considered as distributed versions of the well-known resistive and resonant shunt of a single piezoelectric transducer. The technicalfeasibility and damping effectiveness of the proposed novel devices are assessed through the construction of an experimental prototype. Experimental results are shown to be in very good agreement with theoretical predictions. It is proved that the presented technique allows for a substantial reduction in the inductances used when compared with those required by the single resonant shunted transducer. In particular, it is shown that the required inductance decreases when the number of piezoelectric elements is increased. The electric networks are optimized in order to reduce forced vibrations close to the first resonance frequency. Nevertheless, the damping effectiveness for higher modes is experimentally proved. As well as specific results, fundamental theoretical and experimental considerations for passive distributed vibration control are provided.

  10. A distributed newton method for dynamic Network Utility Maximization with delivery contracts

    E-Print Network [OSTI]

    Wei, Ermin

    The standard Network Utility Maximization (NUM) problem has a static formulation, which fails to capture the temporal dynamics in modern networks. This work considers a dynamic version of the NUM problem by introducing ...

  11. Integrating Network Awareness in ATLAS Distributed Computing Using the ANSE Project

    E-Print Network [OSTI]

    Klimentov, Alexei; The ATLAS collaboration; Petrosyan, Artem; Batista, Jorge Horacio; Mc Kee, Shawn Patrick

    2015-01-01

    A crucial contributor to the success of the massively scaled global computing system that delivers the analysis needs of the LHC experiments is the networking infrastructure upon which the system is built. The experiments have been able to exploit excellent high-bandwidth networking in adapting their computing models for the most efficient utilization of resources. New advanced networking technologies now becoming available such as software defined networking hold the potential of further leveraging the network to optimize workflows and dataflows, through proactive control of the network fabric on the part of high level applications such as experiment workload management and data management systems. End to end monitoring of networks using perfSONAR combined with data flow performance metrics further allows applications to adapt based on real time conditions. We will describe efforts underway in ATLAS on integrating network awareness at the application level, particularly in workload management, building upon ...

  12. A Technology for Electronic Energy Meters Intelligent Accounting Using Distributed Database over TCP/IP Network

    E-Print Network [OSTI]

    Borissova, Daniela

    4 8 A Technology for Electronic Energy Meters Intelligent Accounting Using Distributed Database processing to allow the adequate information integration and resource control in the energy distribution the energy distribution enterprise information. Reading the electronic energy meters is made through

  13. Assessment of a Low Profi le Planar Antenna for a Wireless Sensor Network Monitoring the Local Water Distribution Network

    E-Print Network [OSTI]

    Herbert, Steven; Loh, Tian-Hong; Wassell, Ian

    2014-12-16

    ,” Wireless Sensor Systems, IET, vol. 2, no. 4, pp. 402– 408, December 2012. [3] A. Garcia, T. Tose, L. Ramalho, and D. Sicari, “Wireless sensor networks zigbee applied on sewage treatment station,” in Wireless Sensor Systems (WSS 2012), IET Conference on...

  14. IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 56, NO. 9, SEPTEMBER 2010 4539 Network Coding for Distributed Storage Systems

    E-Print Network [OSTI]

    Wainwright, Martin J.

    for Distributed Storage Systems Alexandros G. Dimakis, Member, IEEE, P. Brighten Godfrey, Student Member, IEEE Abstract--Distributed storage systems provide reliable access to data through redundancy spread over individually unreliable nodes. Application scenarios include data centers, peer-to-peer storage systems

  15. Network design optimization of fuel cell systems and distributed energy devices.

    SciTech Connect (OSTI)

    Colella, Whitney G.

    2010-07-01

    This research explores the thermodynamics, economics, and environmental impacts of innovative, stationary, polygenerative fuel cell systems (FCSs). Each main report section is split into four subsections. The first subsection, 'Potential Greenhouse Gas (GHG) Impact of Stationary FCSs,' quantifies the degree to which GHG emissions can be reduced at a U.S. regional level with the implementation of different FCS designs. The second subsection, 'Optimizing the Design of Combined Heat and Power (CHP) FCSs,' discusses energy network optimization models that evaluate novel strategies for operating CHP FCSs so as to minimize (1) electricity and heating costs for building owners and (2) emissions of the primary GHG - carbon dioxide (CO{sub 2}). The third subsection, 'Optimizing the Design of Combined Cooling, Heating, and Electric Power (CCHP) FCSs,' is similar to the second subsection but is expanded to include capturing FCS heat with absorptive cooling cycles to produce cooling energy. The fourth subsection, - Thermodynamic and Chemical Engineering Models of CCHP FCSs,' discusses the physics and thermodynamic limits of CCHP FCSs.

  16. A Scalable On-Line Multilevel Distributed Network Fault Detectioflonitoring System Based on the SNMP Protocol

    E-Print Network [OSTI]

    Thulsiraman, Krishnaiyan

    in this paper has been motivated by this research trend In network management. We present the design as NMS nodes with dual roles - manager and agent - and to balance loads and to avoid traffic congestion@sosu.edu thulasi@ou.edu London, Ontano,Canada N6A 5B9 Abstract-Traditional centralized network management solutions

  17. Stackelberg Game for Distributed Resource Allocation over Multiuser Cooperative Communication Networks

    E-Print Network [OSTI]

    Liu, K. J. Ray

    . The energy-efficient transmission was consid- ered for broadcast networks in [4]. [5] considered the design Networks Beibei Wang, Zhu Han, and K. J. Ray Liu Department of Electrical and Computer Engineering and Institute for Systems Research, University of Maryland, College Park, MD 20742, USA Department of Electrical

  18. Abstract--The inherent many-to-one flow of traffic in Wireless Sensor Networks produces a skewed distribution of energy

    E-Print Network [OSTI]

    Radha, Hayder

    approaches aimed at balancing the consumption of energy in wireless networks are based on a linear distribution of energy consumption rates leading to the early demise of those sensors that are critical) it puts forward a new understanding of sensor network lifetime based on statistical measures, mean

  19. IEEE/ACM TRANSACTIONS ON NETWORKING, VOL. 13, NO. 1, FEBRUARY 2005 147 A Cone-Based Distributed Topology-Control

    E-Print Network [OSTI]

    IEEE/ACM TRANSACTIONS ON NETWORKING, VOL. 13, NO. 1, FEBRUARY 2005 147 A Cone-Based Distributed Topology-Control Algorithm for Wireless Multi-Hop Networks Li (Erran) Li, Member, IEEE, Joseph Y. Halpern, Senior Member, IEEE, Paramvir Bahl, Senior Member, IEEE, Yi-Min Wang, and Roger Wattenhofer Abstract

  20. Jini technology as a solution to develop distributed instrumentation network in Engineering

    E-Print Network [OSTI]

    Libre de Bruxelles, Université

    -distributed applications like CORBA, LabVIEW or GPIB-ENET.5 2. VIRTUAL INSTRUMENTATION The term virtual instrumentation

  1. Distributed Clustering for Robust Aggregation in Large Networks Ittay Eyal Idit Keidar Raphael Rom

    E-Print Network [OSTI]

    Keidar, Idit

    sensor networks with thousands of light-weight nodes monitoring conditions like seismic activity there are irregu- lar shakes, such as a moving truck, but ignore a shake com- mon to all sensors like a mild

  2. In-situ prediction on sensor networks using distributed multiple linear regression models

    E-Print Network [OSTI]

    Basha, Elizabeth (Elizabeth Ann)

    2010-01-01

    Within sensor networks for environmental monitoring, a class of problems exists that requires in-situ control and modeling. In this thesis, we provide a solution to these problems, enabling model-driven computation where ...

  3. Smart-Metering for Monitoring Building Power Distribution Network using Instantaneous Phasor Computations of Electrical Signals

    E-Print Network [OSTI]

    K.R., Krishnanand

    2013-01-01

    Man, H. and L. Jae-Hyun, Smart home energy management systemand implementation of smart home energy management systemsSocial network of smart-metered homes and SMEs for grid-

  4. Smart-Metering for Monitoring Building Power Distribution Network using Instantaneous Phasor Computations of Electrical Signals

    E-Print Network [OSTI]

    K.R., Krishnanand

    2013-01-01

    efficient operation of a smart meter network . in Industrialpolicies and case studies in smart metering . in Power andG.B. Huitema. Good standards for smart meters . in European

  5. `On a Tracking Scheme with Probabilistic Completeness for a Distributed Sensor Network

    E-Print Network [OSTI]

    Hexmoor, Henry

    presented the results of endowing the sensor network with autonomy. Sensors monitor targets that crisscross modeled through fuzzy rules [1]. The sensor further decides if it would monitor the target by remaining

  6. Distributed connection management for real-time communication over wormhole-routed networks 

    E-Print Network [OSTI]

    Sundaresan, Sharad

    1997-01-01

    Wormhole networks provide a very high-speed communication medium that is well suited for a large number of bandwidth demanding applications. Unfortunately, the lack of buffering in the switches causes blocked packets to transiently monopolize...

  7. Topological Data Processing for Distributed Sensor Networks with Morse-Smale Decomposition

    E-Print Network [OSTI]

    Edinburgh, University of

    of packets in the network (e.g., avoiding sensor nodes with low energy level), or navigation of users/vehicles identify saddle points with increasing and decreasing neighbor values in an alternating fashion, specially

  8. Robotic Local Area Networks with Fault-Tolerant Distributed Layers for Real-Time Control

    E-Print Network [OSTI]

    Liberatore, Vincenzo

    manipulation of a solar panel. The expected overall outcome will consists of a modular software platform teams to perform complex real-time tasks. Robotic teams necessitate innovative networks technology

  9. Distributed data processing within dense networks of wireless sensors using parallelized model updating techniques

    E-Print Network [OSTI]

    Lynch, Jerome P.

    simulated annealing search method optimized for in-network execution, this algorithm efficiently assigns structure model of a six-story steel building exposed to seismic base motion. Keywords: Wireless sensors

  10. Int. J. Communication Networks and Distributed Systems, Vol. x, No. x, xxxx 1 Profiling Distributed Connection Chains

    E-Print Network [OSTI]

    Almulhem, Ahmad

    problem. We then propose a solution through hacker profiling. Our solution includes a novel hacker model that in- tegrates information about a hacker's linguistic, operating system and time of activity. It also Inderscience Enterprises Ltd. #12;2 A. Almulhem and I. Traore victim hacker Figure 1 Using a connection

  11. A Self-Adaptive Middleware for Efficient Routing in Distributed Sensor Networks

    E-Print Network [OSTI]

    Duan, Sisi; Sun, Jingtao

    2015-01-01

    and D. Rubenstein: Energy-efficient computing for wildlifeIsland Hop- ping: Efficient mobility-assisted forwarding inAdaptive Middleware for Efficient Routing in Distributed

  12. Distributed Cooperative Spectrum Sensing for Overlay Self-organizing Dynamic Cognitive Radios Network Systems

    E-Print Network [OSTI]

    Chen, Chih-Kai

    2012-01-01

    and K. Yao, “Energy-based Cooperative Spectrum Sensing forof distributed energy-based cooperative spectrum sensingwe focus on the energy-based cooperative spectrum sensing

  13. Network Coding in Distributed, Dynamic, and Wireless Environments: Algorithms and Applications 

    E-Print Network [OSTI]

    Chaudhry, Mohammad

    2012-02-14

    based on general linear codes. For each scenario, the optimal set of paths to retrieve packets a, b, and c is shown by thick lines. : : : : 101 43 Execution of the algorithm for three-tier networks (a) A three- tier instance of Problem DDR with ve...). : : : : : : : : : : : 114 44 Execution of the algorithm for general networks. (a) A general instance for Problem DDR. (b) Construction of an auxiliary graph H(V^1; V^2; E^) (nodes in V^1 are black and nodes in V^2 are shown in white). (c) Bi-partite graphH(V^1; V^2; E...

  14. Non-invasive Acceleration-based Methodology for Damage Detection and Assessment of Water Distribution System

    E-Print Network [OSTI]

    Shinozuka, Masanobu

    sensor network 1. INTRODUCTION Urban water distribution systems, particularly underground pipeline networks, can be damaged due to earthquake, pipe corrosion, severely cold weather, heavy traffic load include corrosion and aging, excessive surface traffic load- ing, soil failure, etc. For identifying

  15. A Decomposition-based Architecture for Distributed Virtual Network Embedding Flavio Esposito Ibrahim Matta

    E-Print Network [OSTI]

    Matta, Abraham "Ibrahim"

    providers to design a distributed VN embedding protocol that adapts to different scenarios, by merely The cloud computing market is rapidly becoming domi- nated by a small set of public infrastructure providers resource auctions [20]. Although they have systematic logic behind their design, such distributed solutions

  16. Voltage and Frequency Stability of Weak Power Distribution Networks with Droop-Controlled

    E-Print Network [OSTI]

    Lemmon, Michael

    generations (DG's), based on both synchronous generators (SG's) and fast inverters, are incorporated ratio (SCR) in [2]. Connections of DG's, based on both fast inverters and synchronous generators (SG-Controlled Rotational and Electronic Distributed Generators Zhao Wang1 and Michael Lemmon1 Abstract Distributed

  17. A comparison of neural network and processbased models for vegetation distribution under global climate change

    E-Print Network [OSTI]

    climate change Eric Chown chown@cs.orst.edu Thomas G. Dietterich tgd@cs.orst.edu Department of Computer covering current climate and vegetation distribution in the coterminous United States. Completely automated on two tasks: prediction of current vegetation distribution given current climate and prediction

  18. Spectrum Leasing via Cooperative Opportunistic Routing in Distributed Ad Hoc Networks: Optimal and Heuristic Policies

    E-Print Network [OSTI]

    Rossi, Michele

    and a set of unlicensed nodes. The primary network consists of a source, a destination and a set Department of Information Engineering, University of Padova, Italy CWCSPR, New Jersey Institute of Technology of additional primary nodes that can act as relays. In addition, the secondary nodes can be used as extra relays

  19. Distributed Image Search in Camera Sensor Networks Tingxin Yan, Deepak Ganesan, R. Manmatha

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    in the amount of data communicated and up to 5x reduction in overall energy consumption over alternate-rich situations, the re- source limitations of camera sensor networks in terms of energy, bandwidth, computational- tention over recent years, as a result of rapid advances in camera sensor technologies, embedded platforms

  20. Using Batteries to Reduce the Power Costs of Internet-scale Distributed Networks

    E-Print Network [OSTI]

    Giles, C. Lee

    networks are increasingly driven by the cost of supplying power to their servers. Typically, CDNs pro- cure power through long-term contracts from co-location providers and pay on the basis of the power (KWs) pro techniques; De- sign studies Permission to make digital or hard copies of all or part of this work

  1. Design and analysis of distributed primitives for mobile ad hoc networks 

    E-Print Network [OSTI]

    Chen, Yu

    2006-10-30

    by the network, which poses a serious challenge for the design and analysis of reliable protocols. In this work, three different approaches are used to handle mobility. The first part of the dissertation employs the simple technique of ignoring the mobility...

  2. EXPLOITATION OF DISTRIBUTED SOLAR RADIATION DATABASES THROUGH A SMART NETWORK: THE PROJECT SODA

    E-Print Network [OSTI]

    Heinemann, Detlev

    ) Fraunhofer Institute for Solar Energy Systems (Germany) Abstract ­ The project SoDa answers the needs of raw data. 1. INTRODUCTION Information on solar radiation is a critical issue for the use of solar energy. Solar radiation is measured by ground networks of measuring stations, but well- controlled

  3. Between giant oscillations and uniform distribution of droplets -- the role of varying lumen of channels in microfluidic networks

    E-Print Network [OSTI]

    Olgierd Cybulski; Slawomir Jakiela; Piotr Garstecki

    2015-08-19

    The simplest microfluidic network (a loop) comprises two parallel channels with a common inlet and a common outlet. Recent studies, that assumed constant cross-section of the channels along their length, have shown that the sequence of droplets entering left (L) or right (R) arm of the loop can present either a uniform distribution of choices (e.g. RLRLRL...) or long sequences of repeated choices (RRR...LLL), with all the intermediate permutations being dynamically equivalent and virtually equally probable to be observed. We use experiments and computer simulations to show that even small variation of the cross-section along channels completely shifts the dynamics either into the strong preference for highly grouped patterns (RRR...LLL) that generate system-size oscillations in flow, or just the opposite - to patterns that distribute the droplets homogeneously between the arms of the loop. We also show the importance of noise in the process of self-organization of the spatio-temporal patterns of droplets. Our results provide guidelines for rational design of systems that reproducibly produce either grouped or homogeneous sequences of droplets flowing in microfluidic networks.

  4. Acoustic Source Localization via Time Difference of Arrival Estimation for Distributed Sensor Networks Using Tera-Scale Optical Core Devices

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

    Imam, Neena; Barhen, Jacob

    2009-01-01

    For real-time acoustic source localization applications, one of the primary challenges is the considerable growth in computational complexity associated with the emergence of ever larger, active or passive, distributed sensor networks. These sensors rely heavily on battery-operated system components to achieve highly functional automation in signal and information processing. In order to keep communication requirements minimal, it is desirable to perform as much processing on the receiver platforms as possible. However, the complexity of the calculations needed to achieve accurate source localization increases dramatically with the size of sensor arrays, resulting in substantial growth of computational requirements that cannot bemore »readily met with standard hardware. One option to meet this challenge builds upon the emergence of digital optical-core devices. The objective of this work was to explore the implementation of key building block algorithms used in underwater source localization on the optical-core digital processing platform recently introduced by Lenslet Inc. This demonstration of considerably faster signal processing capability should be of substantial significance to the design and innovation of future generations of distributed sensor networks.« less

  5. A Hierarchical Model for Distributed Collaborative Computation in Wireless Sensor Networks

    E-Print Network [OSTI]

    Hwang, Kai

    with the physical world. Example applications include environment monitor- ing, target tracking and fire detection

  6. A Hierarchical Model for Distributed Collaborative Computation in Wireless Sensor Networks

    E-Print Network [OSTI]

    Hwang, Kai

    include environment monitor- ing, target tracking and fire detection [4]. Low cost, ade- quate coverage

  7. IEEE 342 Node Low Voltage Networked Test System

    SciTech Connect (OSTI)

    Schneider, Kevin P.; Phanivong, Phillippe K.; Lacroix, Jean-Sebastian

    2014-07-31

    The IEEE Distribution Test Feeders provide a benchmark for new algorithms to the distribution analyses community. The low voltage network test feeder represents a moderate size urban system that is unbalanced and highly networked. This is the first distribution test feeder developed by the IEEE that contains unbalanced networked components. The 342 node Low Voltage Networked Test System includes many elements that may be found in a networked system: multiple 13.2kV primary feeders, network protectors, a 120/208V grid network, and multiple 277/480V spot networks. This paper presents a brief review of the history of low voltage networks and how they evolved into the modern systems. This paper will then present a description of the 342 Node IEEE Low Voltage Network Test System and power flow results.

  8. Monkey business : creating social awareness among distributed group members, using a network of animatronic agents

    E-Print Network [OSTI]

    Kern, Rachel Lori

    2006-01-01

    Members of a geographically distributed group are not normally aware of each other's presence or current activities. For example, two members of a team may be working on the same project, but they may have offices in ...

  9. Pressure difference-based sensing of leaks in water distribution networks

    E-Print Network [OSTI]

    Kornmayer, Páll Magnús

    2011-01-01

    Human society and civilization rely on the constant availability of fresh water. In regions where a local source of potable water is not available, a transportation and distribution pipe system is employed. When these pipes ...

  10. PROCEEDINGS OF THE FIFTH BERKELEY WORKSHOP ON DISTRIBUTED DATA MANAGEMENT AND COMPUTER NETWORKS

    E-Print Network [OSTI]

    Johnson, R.R.

    2011-01-01

    a Relational Data Base Management System," Proc. ACM-SIGMOD,level of large data base management systems. One reason forA distributed data base management system supports a data

  11. Legacy Computing Markup Language (LCML) and LEGEND -- LEGacy Encapsulation for Network Distribution

    E-Print Network [OSTI]

    Geiger, Stephen Kurt

    2004-01-01

    The rapid increase of computing power and emergence of distributed computing technologies such as Grid computing create new opportunities for scientific computing. One of the challenges faced in harnessing the emerging ...

  12. Vibration control in plates by uniformly distributed PZT actuators interconnected via electric networks

    E-Print Network [OSTI]

    Stefano Vidoli; Francesco dell'Isola

    2010-07-09

    In this paper a novel device aimed at controlling the mechanical vibrations of plates by means of a set of electrically-interconnected piezoelectric actuators is described. The actuators are embedded uniformly in the plate wherein they connect every node of an electric network to ground, thus playing the two-fold role of capacitive element in the electric network and of couple suppliers. A mathematical model is introduced to describe the propagation of electro-mechanical waves in the device; its validity is restricted to the case of wave-forms with wave-length greater than the dimension of the piezoelectric actuators used. A self-resonance criterion is established which assures the possibility of electro-mechanical energy exchange. Finally the problem of vibration control in simply supported and clamped plates is addressed; the optimal net-impedance is determined. The results indicate that the proposed device can improve the performances of piezoelectric actuation

  13. Spatially Resolved Mapping of Disorder Type and Distribution in Random Systems using Artificial Neural Network Recognition

    SciTech Connect (OSTI)

    Jesse, Stephen [ORNL; Kalinin, Sergei V [ORNL; Kumar, Amit [ORNL; Ovchinnikov, Oleg S [ORNL; Guo, Senli [ORNL; Griggio, Flavio [ORNL; Trolier-Mckinstry, Susan E [ORNL

    2011-01-01

    The spatial variability of the polarization dynamics in thin film ferroelectric capacitors was probed by recognition analysis of spatially-resolved spectroscopic data. Switching spectroscopy piezoresponse force microscopy was used to measure local hysteresis loops and map them on a 2D random-bond, random-field Ising model. A neural-network based recognition approach was utilized to analyze the hysteresis loops and their spatial variability. Strong variability is observed in the polarization dynamics around macroscopic cracks due to the modified local elastic and electric boundary conditions, with most pronounced effect on the length scale of ~100 nm away from the crack.

  14. Distributed parallel messaging for multiprocessor systems

    DOE Patents [OSTI]

    Chen, Dong; Heidelberger, Philip; Salapura, Valentina; Senger, Robert M; Steinmacher-Burrow, Burhard; Sugawara, Yutaka

    2013-06-04

    A method and apparatus for distributed parallel messaging in a parallel computing system. The apparatus includes, at each node of a multiprocessor network, multiple injection messaging engine units and reception messaging engine units, each implementing a DMA engine and each supporting both multiple packet injection into and multiple reception from a network, in parallel. The reception side of the messaging unit (MU) includes a switch interface enabling writing of data of a packet received from the network to the memory system. The transmission side of the messaging unit, includes switch interface for reading from the memory system when injecting packets into the network.

  15. Energy-Efficient Distributed Detection Via Multi-hop Transmission in Sensor Networks

    E-Print Network [OSTI]

    Dai, Huaiyu

    does not hold in practice, and makes it difficult to evaluate the true detection performance and energy expenditure. In this paper, we focus on the regime where the number of sensors is large, and investigate makes an observation Yj, i.i.d. across sensors given the hypothesis. The cumulative distribution

  16. Cyber-Physical Codesign of Distributed Structural Health Monitoring With Wireless Sensor Networks

    E-Print Network [OSTI]

    Lu, Chenyang

    the number of sen- sors and the resolution of damage localization, and (2) an energy-efficient, multi- ple, during their lifetimes, bridges suffer from environmental corrosion, persistent traffic and wind that copies are not made or distributed for profit or commercial advantage and that copies bear this notice

  17. Cooperative Distributed Scheduling for Storage Devices in Microgrids using Dynamic KKT Multipliers and Consensus Networks

    E-Print Network [OSTI]

    Chow, Mo-Yuen

    Cooperative Distributed Scheduling for Storage Devices in Microgrids using Dynamic KKT Multipliers in the proceedings of the conference. #12;1 Abstract--Scheduling of storage devices in microgrids with multiple that can optimally schedule the storage devices in a microgrid solely through peer-to-peer coordination

  18. Abstract--Enabled by a dense network of Doppler weather radars with overlapping coverage, Distributed Collaborative

    E-Print Network [OSTI]

    Kurose, Jim

    for high accuracy wind field retrieval. This paper describes the multi- user, multi-attribute utilities are very large size (28 foot diameter antenna) and very high power (half megawatt). At approximately $10-numbers of high-power, high-cost, long-range radars with a paradigm based on Distributed Collaborative Adaptive

  19. Proceedings of the sixth Berkeley workshop on distributed data management and computer networks

    SciTech Connect (OSTI)

    Various Authors

    1982-01-01

    A distributed data base management system allows data to be stored at multiple locations and to be accessed as a single unified data base. In this workshop, seventeen papers were presented which have been prepared separately for the energy data base. These items deal with data transfer, protocols and management. (GHT)

  20. Sensor-network-based robust distributed control and estimation P. Milln a,n,1

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    control strategies typically rely on the assumption of centrality: the information collected about, such as traffic systems, water delivery channels, oil/gas pipelines, electrical power grids water, manufacturing these cases the centrality assumption no longer holds, and a decentralized or distributed strategy is often

  1. Incentive Regulation in Theory and Practice: Electricity Distribution and Transmission Networks

    E-Print Network [OSTI]

    Joskow, Paul

    2006-03-14

    . The first relates to the System Operator (SO) incentive schemes that have been offered to the National Grid Company in England and Wales discussed below. The second is the menu of sliding scale mechanisms offered to the electric distribution companies... ) the introduction of new products and services, and stimulate efficient investment in and pricing of access to regulated infrastructure services. 1 Prepared for the National Bureau of Economic Research Conference...

  2. Between giant oscillations and uniform distribution of droplets -- the role of varying lumen of channels in microfluidic networks

    E-Print Network [OSTI]

    Cybulski, Olgierd; Garstecki, Piotr

    2015-01-01

    The simplest microfluidic network (a loop) comprises two parallel channels with a common inlet and a common outlet. Recent studies, that assumed constant cross-section of the channels along their length, have shown that the sequence of droplets entering left (L) or right (R) arm of the loop can present either a uniform distribution of choices (e.g. RLRLRL...) or long sequences of repeated choices (RRR...LLL), with all the intermediate permutations being dynamically equivalent and virtually equally probable to be observed. We use experiments and computer simulations to show that even small variation of the cross-section along channels completely shifts the dynamics either into the strong preference for highly grouped patterns (RRR...LLL) that generate system-size oscillations in flow, or just the opposite - to patterns that distribute the droplets homogeneously between the arms of the loop. We also show the importance of noise in the process of self-organization of the spatio-temporal patterns of droplets. Our...

  3. Quantum key distribution for 10 Gb/s dense wavelength division multiplexing networks

    SciTech Connect (OSTI)

    Patel, K. A.; Dynes, J. F.; Lucamarini, M.; Choi, I.; Sharpe, A. W.; Yuan, Z. L. Shields, A. J.; Penty, R. V.

    2014-02-03

    We demonstrate quantum key distribution (QKD) with bidirectional 10 Gb/s classical data channels in a single fiber using dense wavelength division multiplexing. Record secure key rates of 2.38 Mbps and fiber distances up to 70?km are achieved. Data channels are simultaneously monitored for error-free operation. The robustness of QKD is further demonstrated with a secure key rate of 445 kbps over 25?km, obtained in the presence of data lasers launching conventional 0 dBm power. We discuss the fundamental limit for the QKD performance in the multiplexing environment.

  4. How (Not) to Protect Genomic Data Privacy in a Distributed Network: Using Trail Re-identification to Evaluate and Design Privacy Protection Systems

    E-Print Network [OSTI]

    1 How (Not) to Protect Genomic Data Privacy in a Distributed Network: Using Trail Re-specific genomic data into clinical practice and research raises serious privacy concerns. Various systems have being disclosed, they lack formal proofs. In this paper, we study the erosion of privacy when genomic

  5. Groundwater Monitoring Network

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

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

  6. SPT: Distributed Sensor Network for Real Time Tracking Bryan Horling, R

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    to address di#11;erent parts of the goal. We de- scribe our solution to this problem in detail, including (DARPA) and Air Force Research Labo- ratory Air Force Materiel Command, USAF, under agree- ments number F Advanced Research Projects Agency (DARPA), Air Force Research Laboratory or the U.S. Government. Permission

  7. Network

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid you notHeatMaRIEdioxide capture CSNationalNational UserNaval TheNetwork

  8. Exploring a Centralized/Distributed Hybrid Routing Protocol for Low Power Wireless Networks and Large-Scale Datacenters

    E-Print Network [OSTI]

    Tavakoli, Arsalan

    2009-01-01

    5.1.1 Datacenter Network Architecture . . . . . . . . 5.1.2Switching Layer for Data Centers 5.1 Datacenter Routing anda) Prevalent 3-layer datacenter network topology. (b) Layer-

  9. Distributed Estimation Distributed Estimation

    E-Print Network [OSTI]

    Gupta, Vijay

    with a Star Topology 2 2.1 Static Sensor Fusion . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.1 Combining Estimators . . . . . . . . . . . . . . . . . . . . 3 2.1.2 Static Sensor Fusion for Star Topology;Distributed Estimation 3 Non-Ideal Networks with Star Topology 10 3.1 Sensor Fusion in Presence of Message

  10. Calculating a checksum with inactive networking components in a computing system

    DOE Patents [OSTI]

    Aho, Michael E; Chen, Dong; Eisley, Noel A; Gooding, Thomas M; Heidelberger, Philip; Tauferner, Andrew T

    2014-12-16

    Calculating a checksum utilizing inactive networking components in a computing system, including: identifying, by a checksum distribution manager, an inactive networking component, wherein the inactive networking component includes a checksum calculation engine for computing a checksum; sending, to the inactive networking component by the checksum distribution manager, metadata describing a block of data to be transmitted by an active networking component; calculating, by the inactive networking component, a checksum for the block of data; transmitting, to the checksum distribution manager from the inactive networking component, the checksum for the block of data; and sending, by the active networking component, a data communications message that includes the block of data and the checksum for the block of data.

  11. Exploring a Centralized/Distributed Hybrid Routing Protocol for Low Power Wireless Networks and Large-Scale Datacenters

    E-Print Network [OSTI]

    Tavakoli, Arsalan

    2009-01-01

    we have modified a Meraki Mini wireless router to serve as awireless networks (L2Ns) are composed of a subnet of embedded net- working devices (Node Routers,

  12. Topic 2: Introduction to Smart Grid A.H. MohsenianRad (U of T) 1Networking and Distributed Systems

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    . They are beginning to be used on electricity networks, from the power plants and wind farms all the way of supply and demand · 2. Minimizing the Need to Construct Back-up (Peak Load) Power Plants ­ Better demand

  13. Exploring a Centralized/Distributed Hybrid Routing Protocol for Low Power Wireless Networks and Large-Scale Datacenters

    E-Print Network [OSTI]

    Tavakoli, Arsalan

    2009-01-01

    characterized as dynamic high-churn environ- ments with low-cases of networking: high-churn, low-bandwidth environmentsend of spectrum, and low-churn, high-bandwidth environments

  14. Modular sensor network node

    DOE Patents [OSTI]

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

    2008-06-10

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

  15. Water Network Design by MINLP

    E-Print Network [OSTI]

    2008-02-12

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

  16. Scaling theory for information networks Melanie E. Moses1,

    E-Print Network [OSTI]

    New Mexico, University of

    , University of New Mexico, Albuquerque, NM 87131, USA 2 School of Computing, University of Utah, Salt Lake, brains, the Internet and microprocessors. Distribution networks enable the integrated and coordinated and performance of networked information systems including transistors on chips, hosts on the Internet and neurons

  17. Using the PALS Architecture to Verify a Distributed Topology Control Protocol for Wireless Multi-Hop Networks in the Presence of Node Failures

    E-Print Network [OSTI]

    Katelman, Michael; 10.4204/EPTCS.36.6

    2010-01-01

    The PALS architecture reduces distributed, real-time asynchronous system design to the design of a synchronous system under reasonable requirements. Assuming logical synchrony leads to fewer system behaviors and provides a conceptually simpler paradigm for engineering purposes. One of the current limitations of the framework is that from a set of independent "synchronous machines", one must compose the entire synchronous system by hand, which is tedious and error-prone. We use Maude's meta-level to automatically generate a synchronous composition from user-provided component machines and a description of how the machines communicate with each other. We then use the new capabilities to verify the correctness of a distributed topology control protocol for wireless networks in the presence of nodes that may fail.

  18. Center for Excellence in Logistics and Distribution

    E-Print Network [OSTI]

    Noble, James S.

    Center for Excellence in Logistics and Distribution (CELDi) James S. Noble, MU Site Director Logistics Network Design in a PBL Environment The Boeing Company Research Team: James Noble (PI), Wooseung · Reverse logistics network evaluation tool · Network configuration · Network operation Broader

  19. An Energy-Aware Simulation Model and Transaction Protocol for Dynamic Workload Distribution in Mobile Ad Hoc Networks1

    E-Print Network [OSTI]

    Pedram, Massoud

    An Energy-Aware Simulation Model and Transaction Protocol for Dynamic Workload Distribution an undesirable occurrence. Uneven distribution of energy resources and computational workloads is especially for detailed evaluation of the performance of different energy management policies in a MANET. Next it presents

  20. Pump apparatus including deconsolidator

    DOE Patents [OSTI]

    Sonwane, Chandrashekhar; Saunders, Timothy; Fitzsimmons, Mark Andrew

    2014-10-07

    A pump apparatus includes a particulate pump that defines a passage that extends from an inlet to an outlet. A duct is in flow communication with the outlet. The duct includes a deconsolidator configured to fragment particle agglomerates received from the passage.

  1. Effect of varying the delay distribution in different classes of networks: random, scale-free, and small-world 

    E-Print Network [OSTI]

    Jang, Bum Soon

    2009-05-15

    ) (center column) during simulations of Mackey-Glass equation with distributed delays is shown. Also shown are phase plane portraits V (t??m) vs. V (i) (right column) generated by two dimensional embedding using delay coordinates. ?=0d (days) denotes the sin... simulations of Mackey-Glass equation with distributed delays is shown. Also shown are phase plane portraits V (t??m) vs. V (i) (right column) generated by two dimensional embedding using delay coordinates. ?=0d (days) denotes the singular delay case. In all...

  2. Network Monitoring in Multicast Networks Using Network Coding

    E-Print Network [OSTI]

    Ho, Tracey

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

  3. Int. J. Communication Networks and Distributed Systems, Vol. 6, No. 1, 2011 59 Copyright 2011 Inderscience Enterprises Ltd.

    E-Print Network [OSTI]

    Wang, Yongge

    Inderscience Enterprises Ltd. sSCADA: securing SCADA infrastructure communications Yongge Wang Department@uncc.edu Abstract: Distributed control systems (DCS) and supervisory control and data acquisition (SCADA) systems the control systems. American Gas Association (AGA), IEC TC57 WG15, IEEE, NIST and National SCADA Test Bed

  4. A Supply Chain Network Game Theory Model with Product Differentiation, Outsourcing of Production and Distribution, and Quality and Price Competition

    E-Print Network [OSTI]

    Nagurney, Anna

    and Langley (1997)). In addition, depend- ing upon the location of the outsourcing of manufacturing, firms may products. Keywords: outsourcing, manufacturing, distribution, supply chain management, supply chain an immense impact on manufacturing industries as wide-ranging as pharmaceuticals to fast fashion to high

  5. Exploring a Centralized/Distributed Hybrid Routing Protocol for Low Power Wireless Networks and Large-Scale Datacenters

    E-Print Network [OSTI]

    Tavakoli, Arsalan

    2009-01-01

    and Nicolas Riou. Building automation routing requirementsmonitoring [59], building automation [53], and smart homes [applications include building automation [53] and smart

  6. Methods, media and systems for managing a distributed application running in a plurality of digital processing devices

    DOE Patents [OSTI]

    Laadan, Oren; Nieh, Jason; Phung, Dan

    2012-10-02

    Methods, media and systems for managing a distributed application running in a plurality of digital processing devices are provided. In some embodiments, a method includes running one or more processes associated with the distributed application in virtualized operating system environments on a plurality of digital processing devices, suspending the one or more processes, and saving network state information relating to network connections among the one or more processes. The method further include storing process information relating to the one or more processes, recreating the network connections using the saved network state information, and restarting the one or more processes using the stored process information.

  7. Exploring network structure, dynamics, and function using networkx

    SciTech Connect (OSTI)

    Hagberg, Aric [Los Alamos National Laboratory; Swart, Pieter [Los Alamos National Laboratory; S Chult, Daniel [COLGATE UNIV

    2008-01-01

    NetworkX is a Python language package for exploration and analysis of networks and network algorithms. The core package provides data structures for representing many types of networks, or graphs, including simple graphs, directed graphs, and graphs with parallel edges and self loops. The nodes in NetworkX graphs can be any (hashable) Python object and edges can contain arbitrary data; this flexibility mades NetworkX ideal for representing networks found in many different scientific fields. In addition to the basic data structures many graph algorithms are implemented for calculating network properties and structure measures: shortest paths, betweenness centrality, clustering, and degree distribution and many more. NetworkX can read and write various graph formats for eash exchange with existing data, and provides generators for many classic graphs and popular graph models, such as the Erdoes-Renyi, Small World, and Barabasi-Albert models, are included. The ease-of-use and flexibility of the Python programming language together with connection to the SciPy tools make NetworkX a powerful tool for scientific computations. We discuss some of our recent work studying synchronization of coupled oscillators to demonstrate how NetworkX enables research in the field of computational networks.

  8. Phoebus: Network Middleware for Next-Generation Network Computing

    SciTech Connect (OSTI)

    Martin Swany

    2012-06-16

    The Phoebus project investigated algorithms, protocols, and middleware infrastructure to improve end-to-end performance in high speed, dynamic networks. The Phoebus system essentially serves as an adaptation point for networks with disparate capabilities or provisioning. This adaptation can take a variety of forms including acting as a provisioning agent across multiple signaling domains, providing transport protocol adaptation points, and mapping between distributed resource reservation paradigms and the optical network control plane. We have successfully developed the system and demonstrated benefits. The Phoebus system was deployed in Internet2 and in ESnet, as well as in GEANT2, RNP in Brazil and over international links to Korea and Japan. Phoebus is a system that implements a new protocol and associated forwarding infrastructure for improving throughput in high-speed dynamic networks. It was developed to serve the needs of large DOE applications on high-performance networks. The idea underlying the Phoebus model is to embed Phoebus Gateways (PGs) in the network as on-ramps to dynamic circuit networks. The gateways act as protocol translators that allow legacy applications to use dedicated paths with high performance.

  9. Controlling synchronization in large laser networks using number theory

    E-Print Network [OSTI]

    Micha Nixon; Moti Fridman; Eitan Ronen; Asher A. Friesem; Nir Davidson; Ido Kanter

    2011-12-18

    Synchronization in networks with delayed coupling are ubiquitous in nature and play a key role in almost all fields of science including physics, biology, ecology, climatology and sociology. In general, the published works on network synchronization are based on data analysis and simulations, with little experimental verification. Here we develop and experimentally demonstrate various multi-cluster phase synchronization scenarios within coupled laser networks. Synchronization is controlled by the network connectivity in accordance to number theory, whereby the number of synchronized clusters equals the greatest common divisor of network loops. This dependence enables remote switching mechanisms to control the optical phase coherence among distant lasers by local network connectivity adjustments. Our results serve as a benchmark for a broad range of coupled oscillators in science and technology, and offer feasible routes to achieve multi-user secure protocols in communication networks and parallel distribution of versatile complex combinatorial tasks in optical computers.

  10. Parameters affecting the resilience of scale-free networks to random failures.

    SciTech Connect (OSTI)

    Link, Hamilton E.; LaViolette, Randall A.; Lane, Terran (University of New Mexico, Albuquerque, NM); Saia, Jared (University of New Mexico, Albuquerque, NM)

    2005-09-01

    It is commonly believed that scale-free networks are robust to massive numbers of random node deletions. For example, Cohen et al. in (1) study scale-free networks including some which approximate the measured degree distribution of the Internet. Their results suggest that if each node in this network failed independently with probability 0.99, most of the remaining nodes would still be connected in a giant component. In this paper, we show that a large and important subclass of scale-free networks are not robust to massive numbers of random node deletions. In particular, we study scale-free networks which have minimum node degree of 1 and a power-law degree distribution beginning with nodes of degree 1 (power-law networks). We show that, in a power-law network approximating the Internet's reported distribution, when the probability of deletion of each node is 0.5 only about 25% of the surviving nodes in the network remain connected in a giant component, and the giant component does not persist beyond a critical failure rate of 0.9. The new result is partially due to improved analytical accommodation of the large number of degree-0 nodes that result after node deletions. Our results apply to power-law networks with a wide range of power-law exponents, including Internet-like networks. We give both analytical and empirical evidence that such networks are not generally robust to massive random node deletions.

  11. Comparative analysis of collaboration networks

    SciTech Connect (OSTI)

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

    2011-03-14

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

  12. Use of model calibration to achieve high accuracy in analysis of computer networks

    DOE Patents [OSTI]

    Frogner, Bjorn; Guarro, Sergio; Scharf, Guy

    2004-05-11

    A system and method are provided for creating a network performance prediction model, and calibrating the prediction model, through application of network load statistical analyses. The method includes characterizing the measured load on the network, which may include background load data obtained over time, and may further include directed load data representative of a transaction-level event. Probabilistic representations of load data are derived to characterize the statistical persistence of the network performance variability and to determine delays throughout the network. The probabilistic representations are applied to the network performance prediction model to adapt the model for accurate prediction of network performance. Certain embodiments of the method and system may be used for analysis of the performance of a distributed application characterized as data packet streams.

  13. Dynamic Data Fusion for Future Sensor Networks Umakishore Ramachandran, Rajnish Kumar, Matthew Wolenetz, Brian Cooper,

    E-Print Network [OSTI]

    Ramachandran, Umakishore

    Dynamic Data Fusion for Future Sensor Networks Umakishore Ramachandran, Rajnish Kumar, Matthew fusion in sensor networks. It bridges an important abstraction gap for developing advanced fusion of the DFuse architecture include a fusion API, a distributed role assignment algorithm that dynamically adapts

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

    E-Print Network [OSTI]

    Schoenebeck, Grant

    2013-01-01

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

  15. Network Characterization Service (NCS)

    SciTech Connect (OSTI)

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

    2001-06-06

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

  16. Distributed Multi-Hop Network Association in Large-Scale Wireless Sensor Hyung-Sin Kim, Jae-Seok Bang, and Yong-Hwan Lee

    E-Print Network [OSTI]

    Bahk, Saewoong

    (i.e., to minimize energy consumption), while providing networking expansion capability [4]. ZigBee addressing space increasing exponentially proportional to the network depth [7]. Moreover, ZigBee employs]. As a consequence, ZigBee may not be practical for the construction of a large scale network. A stochastic address

  17. Flexible network wireless transceiver and flexible network telemetry transceiver

    DOE Patents [OSTI]

    Brown, Kenneth D. (Grain Valley, MO)

    2008-08-05

    A transceiver for facilitating two-way wireless communication between a baseband application and other nodes in a wireless network, wherein the transceiver provides baseband communication networking and necessary configuration and control functions along with transmitter, receiver, and antenna functions to enable the wireless communication. More specifically, the transceiver provides a long-range wireless duplex communication node or channel between the baseband application, which is associated with a mobile or fixed space, air, water, or ground vehicle or other platform, and other nodes in the wireless network or grid. The transceiver broadly comprises a communication processor; a flexible telemetry transceiver including a receiver and a transmitter; a power conversion and regulation mechanism; a diplexer; and a phased array antenna system, wherein these various components and certain subcomponents thereof may be separately enclosed and distributable relative to the other components and subcomponents.

  18. Network Management Network Management

    E-Print Network [OSTI]

    Giaccone, Paolo

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

  19. Consistency Error Modeling-based Localization in Sensor Networks

    E-Print Network [OSTI]

    Feng, Jessica; Potkonjak, Miodrag

    2006-01-01

    distributed, embedded, wireless systems. IEEE CAS WorkshopConference on Embedded Networked Sensor Systems. (Nov.

  20. Multilevel method for modeling large-scale networks.

    SciTech Connect (OSTI)

    Safro, I. M. (Mathematics and Computer Science)

    2012-02-24

    Understanding the behavior of real complex networks is of great theoretical and practical significance. It includes developing accurate artificial models whose topological properties are similar to the real networks, generating the artificial networks at different scales under special conditions, investigating a network dynamics, reconstructing missing data, predicting network response, detecting anomalies and other tasks. Network generation, reconstruction, and prediction of its future topology are central issues of this field. In this project, we address the questions related to the understanding of the network modeling, investigating its structure and properties, and generating artificial networks. Most of the modern network generation methods are based either on various random graph models (reinforced by a set of properties such as power law distribution of node degrees, graph diameter, and number of triangles) or on the principle of replicating an existing model with elements of randomization such as R-MAT generator and Kronecker product modeling. Hierarchical models operate at different levels of network hierarchy but with the same finest elements of the network. However, in many cases the methods that include randomization and replication elements on the finest relationships between network nodes and modeling that addresses the problem of preserving a set of simplified properties do not fit accurately enough the real networks. Among the unsatisfactory features are numerically inadequate results, non-stability of algorithms on real (artificial) data, that have been tested on artificial (real) data, and incorrect behavior at different scales. One reason is that randomization and replication of existing structures can create conflicts between fine and coarse scales of the real network geometry. Moreover, the randomization and satisfying of some attribute at the same time can abolish those topological attributes that have been undefined or hidden from researchers. We propose to develop multilevel methods to model complex networks. The key point of the proposed strategy is that it will help to preserve part of the unknown structural attributes by guaranteeing the similar behavior of the real and artificial model on different scales.

  1. Efficient flooding for wireless mesh networks

    E-Print Network [OSTI]

    Subramanian, Jayashree, Ph. D. Massachusetts Institute of Technology

    2012-01-01

    Flooding in wireless mesh networks involves distributing some data from one node to rest of the nodes in the network. This dissertation proposes UFlood, a flooding protocol for wireless mesh networks that targets large ...

  2. Landscape Characterization and Representativeness Analysis for Understanding Sampling Network Coverage

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

    Maddalena, Damian; Hoffman, Forrest; Kumar, Jitendra; Hargrove, William

    Sampling networks rarely conform to spatial and temporal ideals, often comprised of network sampling points which are unevenly distributed and located in less than ideal locations due to access constraints, budget limitations, or political conflict. Quantifying the global, regional, and temporal representativeness of these networks by quantifying the coverage of network infrastructure highlights the capabilities and limitations of the data collected, facilitates upscaling and downscaling for modeling purposes, and improves the planning efforts for future infrastructure investment under current conditions and future modeled scenarios. The work presented here utilizes multivariate spatiotemporal clustering analysis and representativeness analysis for quantitative landscape characterization and assessment of the Fluxnet, RAINFOR, and ForestGEO networks. Results include ecoregions that highlight patterns of bioclimatic, topographic, and edaphic variables and quantitative representativeness maps of individual and combined networks.

  3. Landscape Characterization and Representativeness Analysis for Understanding Sampling Network Coverage

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

    Maddalena, Damian; Hoffman, Forrest; Kumar, Jitendra; Hargrove, William

    2014-08-01

    Sampling networks rarely conform to spatial and temporal ideals, often comprised of network sampling points which are unevenly distributed and located in less than ideal locations due to access constraints, budget limitations, or political conflict. Quantifying the global, regional, and temporal representativeness of these networks by quantifying the coverage of network infrastructure highlights the capabilities and limitations of the data collected, facilitates upscaling and downscaling for modeling purposes, and improves the planning efforts for future infrastructure investment under current conditions and future modeled scenarios. The work presented here utilizes multivariate spatiotemporal clustering analysis and representativeness analysis for quantitative landscape characterization and assessment of the Fluxnet, RAINFOR, and ForestGEO networks. Results include ecoregions that highlight patterns of bioclimatic, topographic, and edaphic variables and quantitative representativeness maps of individual and combined networks.

  4. Building and measuring a high performance network architecture

    SciTech Connect (OSTI)

    Kramer, William T.C.; Toole, Timothy; Fisher, Chuck; Dugan, Jon; Wheeler, David; Wing, William R; Nickless, William; Goddard, Gregory; Corbato, Steven; Love, E. Paul; Daspit, Paul; Edwards, Hal; Mercer, Linden; Koester, David; Decina, Basil; Dart, Eli; Paul Reisinger, Paul; Kurihara, Riki; Zekauskas, Matthew J; Plesset, Eric; Wulf, Julie; Luce, Douglas; Rogers, James; Duncan, Rex; Mauth, Jeffery

    2001-04-20

    Once a year, the SC conferences present a unique opportunity to create and build one of the most complex and highest performance networks in the world. At SC2000, large-scale and complex local and wide area networking connections were demonstrated, including large-scale distributed applications running on different architectures. This project was designed to use the unique opportunity presented at SC2000 to create a testbed network environment and then use that network to demonstrate and evaluate high performance computational and communication applications. This testbed was designed to incorporate many interoperable systems and services and was designed for measurement from the very beginning. The end results were key insights into how to use novel, high performance networking technologies and to accumulate measurements that will give insights into the networks of the future.

  5. An analysis of international transportation network

    E-Print Network [OSTI]

    Chiu, Yu-Yen

    2005-01-01

    This thesis discusses a network design problem based on a case study with a footwear company, which intends to minimize total supply chain costs by establishing a distribution network which bypasses its primary distribution ...

  6. Monitoring and control requirement definition study for dispersed storage and generation (DSG). Volume IV. Final report, Appendix C: identification from utility visits of present and future approaches to integration of DSG into distribution networks

    SciTech Connect (OSTI)

    Not Available

    1980-10-01

    A major aim of the US National Energy Policy, as well as that of the New York State Energy Research and Development Authority, is to conserve energy and to shift from oil to more abundant domestic fuels and renewable energy sources. Dispersed Storage and Generation (DSG) is the term that characterizes the present and future dispersed, relatively small (<30 MW) energy systems, such as solar thermal electric, photovoltaic, wind, fuel cell, storage battery, hydro, and cogeneration, which can help achieve these national energy goals and can be dispersed throughout the distribution portion of an electric utility system. As a result of visits to four utilities concerned with the use of DSG power sources on their distribution networks, some useful impressions of present and future approaches to the integration of DSGs into electrical distribution network have been obtained. A more extensive communications and control network will be developed by utilities for control of such sources for future use. Different approaches to future utility systems with DSG are beginning to take shape. The new DSG sources will be in decentralized locations with some measure of centralized control. The utilities have yet to establish firmly the communication and control means or their organization. For the present, the means for integrating the DSGs and their associated monitoring and control equipment into a unified system have not been decided.

  7. Biological and Environmental Research Network Requirements

    SciTech Connect (OSTI)

    Balaji, V.; Boden, Tom; Cowley, Dave; Dart, Eli; Dattoria, Vince; Desai, Narayan; Egan, Rob; Foster, Ian; Goldstone, Robin; Gregurick, Susan; Houghton, John; Izaurralde, Cesar; Johnston, Bill; Joseph, Renu; Kleese-van Dam, Kerstin; Lipton, Mary; Monga, Inder; Pritchard, Matt; Rotman, Lauren; Strand, Gary; Stuart, Cory; Tatusova, Tatiana; Tierney, Brian; Thomas, Brian; Williams, Dean N.; Zurawski, Jason

    2013-09-01

    The Energy Sciences Network (ESnet) is the primary provider of network connectivity for the U.S. Department of Energy (DOE) Office of Science (SC), the single largest supporter of basic research in the physical sciences in the United States. In support of SC programs, ESnet regularly updates and refreshes its understanding of the networking requirements of the instruments, facilities, scientists, and science programs that it serves. This focus has helped ESnet be a highly successful enabler of scientific discovery for over 25 years. In November 2012, ESnet and the Office of Biological and Environmental Research (BER) of the DOE SC organized a review to characterize the networking requirements of the programs funded by the BER program office. Several key findings resulted from the review. Among them: 1) The scale of data sets available to science collaborations continues to increase exponentially. This has broad impact, both on the network and on the computational and storage systems connected to the network. 2) Many science collaborations require assistance to cope with the systems and network engineering challenges inherent in managing the rapid growth in data scale. 3) Several science domains operate distributed facilities that rely on high-performance networking for success. Key examples illustrated in this report include the Earth System Grid Federation (ESGF) and the Systems Biology Knowledgebase (KBase). This report expands on these points, and addresses others as well. The report contains a findings section as well as the text of the case studies discussed at the review.

  8. A Study of Grouping Effect On Mobile Actuator Sensor Networks for Distributed Feedback Control of Diffusion Process Using Central Voronoi Tessellations

    E-Print Network [OSTI]

    Ren, Wei

    grouping, mobile actuator networks, coordinated control, diffusion process, pollution neutralization, Centroidal Voronoi Tessellation. I. INTRODUCTION The deployment of large groups of unmanned vehicles for pollution detection which mo- tivates "Mobile Actuator and Sensor Network (MAS-net) project" in CSOIS, Utah

  9. Mobility in Wireless Sensor Networks

    E-Print Network [OSTI]

    Mehta, Ankur Mukesh

    2012-01-01

    4 Wireless Protocol Modifications 4.1contains a distributed wireless network with per- vasiveprocessing, control, and wireless communication on a board

  10. On Counteracting Byzantine Attacks in Network Coded Peer-to-Peer Networks

    E-Print Network [OSTI]

    Medard, Muriel

    Random linear network coding can be used in peer-to- peer networks to increase the efficiency of content distribution and distributed storage. However, these systems are particularly susceptible to Byzantine attacks. We ...

  11. ETH Zurich Distributed Computing Group Stephan Holzer 1ETH Zurich Distributed Computing www.disco.ethz.ch Stephan Holzer

    E-Print Network [OSTI]

    ETH Zurich ­ Distributed Computing Group Stephan Holzer 1ETH Zurich ­ Distributed Computing ­ www Networks #12;ETH Zurich ­ Distributed Computing Group Stephan Holzer 2 Problem: Self-Monitoring in Dynamic Wireless Networks Who is in the network? O(1)? Update #12;ETH Zurich ­ Distributed Computing Group Stephan

  12. Class network routing

    DOE Patents [OSTI]

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

    2009-09-08

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

  13. USENIX Association NSDI '09: 6th USENIX Symposium on Networked Systems Design and Implementation 59 PADS: A Policy Architecture for Distributed Storage Systems

    E-Print Network [OSTI]

    Dahlin, Michael D.

    PADS: A Policy Architecture for Distributed Storage Systems Nalini Belaramani, Jiandan Zheng§, Amol for build- ing distributed storage systems. A policy architecture has two aspects. First, a common set for how policies, them- selves, should be specified. In the case of distributed storage systems, PADS

  14. Network Management Network Management

    E-Print Network [OSTI]

    Giaccone, Paolo

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

  15. Deep Lambertian Networks Introduction

    E-Print Network [OSTI]

    Toronto, University of

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

  16. Countries Gasoline Prices Including Taxes

    Gasoline and Diesel Fuel Update (EIA)

    Crude oil, gasoline, heating oil, diesel, propane, and other liquids including biofuels and natural gas liquids. Natural Gas Exploration and reserves, storage, imports and...

  17. ASCR Science Network Requirements

    SciTech Connect (OSTI)

    Dart, Eli; Tierney, Brian

    2009-08-24

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

  18. Distributed Wind 2015

    Broader source: Energy.gov [DOE]

    Distributed Wind 2015 is committed to the advancement of both distributed and community wind energy. This two day event includes a Business Conference with sessions focused on advancing the...

  19. Precision Irrigators Network 

    E-Print Network [OSTI]

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

    2007-01-01

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

  20. 6.852J / 18.437J Distributed Algorithms, Fall 2001

    E-Print Network [OSTI]

    Lynch, Nancy A. (Nancy Ann), 1948-

    Design and analysis of concurrent algorithms, emphasizing those suitable for use in distributed networks. Process synchronization, allocation of computational resources, distributed consensus, distributed graph algorithms, ...

  1. Sensor networks offer a powerful combination of distributed sensing, computing and com-munication. They lend themselves to countless applications and, at the same time, offer

    E-Print Network [OSTI]

    Haenggi, Martin

    environmental data (air temperature, light, wind, relative humidity and rainfall) are gathered by a network to their peculiarities, primarily the stringent energy constraints to which sensing nodes are typically subjected. The distinguishing traits of sensor net- works have a direct impact on the hardware design of the nodes at at least

  2. Abstract--Broadcast TV distribution over an IP network requires stringent QoS constraints, such as low latency and loss.

    E-Print Network [OSTI]

    Greenberg, Albert

    technique at the IP layer. Link-based FRR creates a pseudo-wire or tunnel in parallel to the IP adjacencies (links); and thus, single link failures are transparent to the Interior Gateway Protocol (IGP). Although to rebuild the multi-cast tree after a network failure. This process, when combined with the Internal Gateway

  3. Neutralino relic density including coannihilations

    E-Print Network [OSTI]

    Paolo Gondolo; Joakim Edsjo

    1997-11-25

    We give an overview of our precise calculation of the relic density of the lightest neutralino, in which we included relativistic Boltzmann averaging, subthreshold and resonant annihilations, and coannihilation processes with charginos and neutralinos.

  4. A Performance Comparison of Tree and Ring Topologies in Distributed System

    SciTech Connect (OSTI)

    Min Huang

    2005-12-19

    A distributed system is a collection of computers that are connected via a communication network. Distributed systems have become commonplace due to the wide availability of low-cost, high performance computers and network devices. However, the management infrastructure often does not scale well when distributed systems get very large. Some of the considerations in building a distributed system are the choice of the network topology and the method used to construct the distributed system so as to optimize the scalability and reliability of the system, lower the cost of linking nodes together and minimize the message delay in transmission, and simplify system resource management. We have developed a new distributed management system that is able to handle the dynamic increase of system size, detect and recover the unexpected failure of system services, and manage system resources. The topologies used in the system are the tree-structured network and the ring-structured network. This thesis presents the research background, system components, design, implementation, experiment results and the conclusions of our work. The thesis is organized as follows: the research background is presented in chapter 1. Chapter 2 describes the system components, including the different node types and different connection types used in the system. In chapter 3, we describe the message types and message formats in the system. We discuss the system design and implementation in chapter 4. In chapter 5, we present the test environment and results, Finally, we conclude with a summary and describe our future work in chapter 6.

  5. Optimal redundancy against disjoint vulnerabilities in networks

    E-Print Network [OSTI]

    Krause, Sebastian M; Zlati?, Vinko

    2015-01-01

    Redundancy is commonly used to guarantee continued functionality in networked systems. However, often many nodes are vulnerable to the same failure or adversary. A "backup" path is not sufficient if both paths depend on nodes which share a vulnerability.For example, if two nodes of the Internet cannot be connected without using routers belonging to a given untrusted entity, then all of their communication-regardless of the specific paths utilized-will be intercepted by the controlling entity.In this and many other cases, the vulnerabilities affecting the network are disjoint: each node has exactly one vulnerability but the same vulnerability can affect many nodes. To discover optimal redundancy in this scenario, we describe each vulnerability as a color and develop a "color-avoiding percolation" which uncovers a hidden color-avoiding connectivity. We present algorithms for color-avoiding percolation of general networks and an analytic theory for random graphs with uniformly distributed colors including critic...

  6. Protecting Intelligent Distributed Power Grids Against Cyber...

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

    distribution, IT networks, and control systems-that use automated data analysis and demand response capabilities to increase system functionality, efficiency, and...

  7. OFC Review 2013 Software Defined Network (SDN)

    E-Print Network [OSTI]

    California at Davis, University of

    and transmission rate w/o hardware change Dedicated PCE to scale OpenFlow architectutre #12;Network ArchitectureOFC Review 2013 Software Defined Network (SDN) M. Farhan Habib May 10, 2013 Friday Group Meeting Networks Lab @ UCD #12;NTu3F: SDN in Today's Network #12;SDN: What and Why · Traditional distributed

  8. Low-voltage switchgear and controlgear assemblies - Part 5: Particular requirements for assemblies intended to be installed outdoors in public places - Cable distribution cabinets (CDCs) for power distribution in networks

    E-Print Network [OSTI]

    International Electrotechnical Commission. Geneva

    1998-01-01

    Gives supplementary requirements for cable distribution cabinets (CDC), which are stationary, type-tested assemblies (TTA) for outdoor installation in places which are exposed to the public, but where only skilled persons have access to their use. They are safe for use in public three-phase systems

  9. A Two-Stage Distributed Architecture for Voltage Control in Power Distribution Systems

    E-Print Network [OSTI]

    Hadjicostis, Christoforos

    (PHEVs). These generation and storage resources are commonly referred to as distributed energy resources in distribution networks that relies on controlling reactive power injections provided by distributed energy resources (DERs). A local controller on each bus of the network monitors the bus voltage and, whenever

  10. Sensor network localization based on natural phenomena

    E-Print Network [OSTI]

    Kim, Daniel Sang

    2006-01-01

    Autonomous localization is crucial for many sensor network applications. The goal of this thesis is to develop a distributed localization algorithm for the PLUG indoor sensor network by analyzing sound and light sensory ...

  11. Orchestrating Distributed Resource Ensembles for Petascale Science

    SciTech Connect (OSTI)

    Baldin, Ilya; Mandal, Anirban; Ruth, Paul; Yufeng, Xin

    2014-04-24

    Distributed, data-intensive computational science applications of interest to DOE scientific com- munities move large amounts of data for experiment data management, distributed analysis steps, remote visualization, and accessing scientific instruments. These applications need to orchestrate ensembles of resources from multiple resource pools and interconnect them with high-capacity multi- layered networks across multiple domains. It is highly desirable that mechanisms are designed that provide this type of resource provisioning capability to a broad class of applications. It is also important to have coherent monitoring capabilities for such complex distributed environments. In this project, we addressed these problems by designing an abstract API, enabled by novel semantic resource descriptions, for provisioning complex and heterogeneous resources from multiple providers using their native provisioning mechanisms and control planes: computational, storage, and multi-layered high-speed network domains. We used an extensible resource representation based on semantic web technologies to afford maximum flexibility to applications in specifying their needs. We evaluated the effectiveness of provisioning using representative data-intensive ap- plications. We also developed mechanisms for providing feedback about resource performance to the application, to enable closed-loop feedback control and dynamic adjustments to resource allo- cations (elasticity). This was enabled through development of a novel persistent query framework that consumes disparate sources of monitoring data, including perfSONAR, and provides scalable distribution of asynchronous notifications.

  12. Seven Deadliest Network Attacks

    SciTech Connect (OSTI)

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

    2010-05-01

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

  13. To appear in Large Scale Network-Centric Computing Systems, Editors: H. Sarbazi-Azad and A. Zomaya, Wiley Series on Parallel and Distributed Computing, Jul. 2013

    E-Print Network [OSTI]

    Pedram, Massoud

    infrastructure, Electrical Grid, personnel and billions of dollars in capital expenditure and operational cost University of Southern California Department of Electrical Engineering Los Angeles CA, USA Abstract a broad range of application areas from energy production and distribution, complex weather modeling

  14. FRIB cryogenic distribution system

    SciTech Connect (OSTI)

    Ganni, V.; Dixon, K.; Laverdure, N.; Knudsen, P.; Arenius, D. [Thomas Jefferson National Accelerator Facility (JLab), Newport News, VA 23606 (United States); Barrios, M.; Jones, S.; Johnson, M.; Casagrande, F. [Facility for Rare Isotope Beams (FRIB), Michigan State University, East Lansing, MI 48824 (United States)

    2014-01-29

    The Michigan State University Facility for Rare Isotope Beams (MSU-FRIB) helium distribution system has been revised to include bayonet/warm valve type disconnects between each cryomodule and the transfer line distribution system, similar to the Thomas Jefferson National Accelerator Facility (JLab) and the Spallation Neutron Source (SNS) cryogenic distribution systems. The heat loads at various temperature levels and some of the features in the design of the distribution system are outlined. The present status, the plans for fabrication, and the procurement approach for the helium distribution system are also included.

  15. FRIB cryogenic distribution system

    SciTech Connect (OSTI)

    Ganni, Venkatarao [JLAB; Dixon, Kelly D. [JLAB; Laverdure, Nathaniel A. [JLAB; Knudsen, Peter N. [JLAB; Arenius, Dana M. [JLAB; Barrios, Matthew N. [Michigan State; Jones, S. [Michigan State; Johnson, M. [Michigan State; Casagrande, Fabio [Michigan State

    2014-01-01

    The Michigan State University Facility for Rare Isotope Beams (MSU-FRIB) helium distribution system has been revised to include bayonet/warm valve type disconnects between each cryomodule and the transfer line distribution system, similar to the Thomas Jefferson National Accelerator Facility (JLab) and the Spallation Neutron Source (SNS) cryogenic distribution systems. The heat loads at various temperature levels and some of the features in the design of the distribution system are outlined. The present status, the plans for fabrication, and the procurement approach for the helium distribution system are also included.

  16. Reducing total fulfillment at costs at Amazon EU through network design optimization

    E-Print Network [OSTI]

    Merriam, Ken (Ken A.)

    2007-01-01

    A key supply chain management issue encountered by any business requiring a distribution system is in designing its distribution network. A distribution network configuration has both direct and indirect ongoing effects ...

  17. Stone Age Distributed Computing (Extended Abstract)

    E-Print Network [OSTI]

    Stone Age Distributed Computing (Extended Abstract) Yuval Emek Distributed Computing Group ETH Zurich, Switzerland yemek@ethz.ch Roger Wattenhofer Distributed Computing Group ETH Zurich, Switzerland and cellular automata is suitable for applying the distributed computing lens to the study of networks of sub

  18. Characteristic functions and process identification by neural networks

    E-Print Network [OSTI]

    Dente, J A

    1997-01-01

    Principal component analysis (PCA) algorithms use neural networks to extract the eigenvectors of the correlation matrix from the data. However, if the process is non-Gaussian, PCA algorithms or their higher order generalisations provide only incomplete or misleading information on the statistical properties of the data. To handle such situations we propose neural network algorithms, with an hybrid (supervised and unsupervised) learning scheme, which constructs the characteristic function of the probability distribution and the transition functions of the stochastic process. Illustrative examples are presented, which include Cauchy and Levy-type processes

  19. Maximizing Static Network Lifetime of Wireless Broadcast Adhoc Networks

    E-Print Network [OSTI]

    Poovendran, Radha

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

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

    E-Print Network [OSTI]

    Fagherazzi, Sergio

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

  1. Ad-hoc wireless network coverage with networked robots that cannot localize

    E-Print Network [OSTI]

    Correll, Nikolaus

    We study a fully distributed, reactive algorithm for deployment and maintenance of a mobile communication backbone that provides an area around a network gateway with wireless network access for higher-level agents. Possible ...

  2. Bayesian Network Models of Portfolio Risk and Return

    E-Print Network [OSTI]

    Shenoy, Catherine; Shenoy, Prakash P.

    2000-01-01

    that in country-specific diversified portfolios, significant mis-measurement of risk occurs if the market proxy does not include global factors. The arbitrage pricing theory (APT) (Ross 1976) and other multi-factor models (see Elton and Gruber 1997) extends... Rate (IR), Stock Market (SM), Oil Industry (OI), and Oil Company Stock Price (SP). At the quantitative level, we specify conditional probability distributions for each variable in the network. Each variable has a set of possible values called its state...

  3. Introducing FNCS: Framework for Network Co-Simulation

    SciTech Connect (OSTI)

    2014-10-23

    This video provides a basic overview of the PNNL Future Power Grid Initiative-developed Framework for Network Co-Simulation (FNCS). It discusses the increasing amounts of data coming from the power grid, and the need for a tool like FNCS that brings together data, transmission and distribution simulators. Included is a description of the FNCS architecture, and the advantages this new open source tool can bring to grid research and development efforts.

  4. Optimization in Networks

    E-Print Network [OSTI]

    Adilson E. Motter; Zoltan Toroczkai

    2007-07-07

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

  5. Stochastic Programming Formulation for Integrating Renewables into the Distribution Grid

    E-Print Network [OSTI]

    Ernst, Damien

    #12;Distribution Networks Distribution networks had been designed to carry power from the transmis. The set of scenarios sizing the network infrastructure might not be frequent. Much more kilometers of electricity markets : .... Day-ahead market Intraday market Time ... Period 1 Period 2 Period T ... Real

  6. Integrated network design and scheduling problems : optimization algorithms and applications.

    SciTech Connect (OSTI)

    Nurre, Sarah G.; Carlson, Jeffrey J.

    2014-01-01

    We consider the class of integrated network design and scheduling problems. These problems focus on selecting and scheduling operations that will change the characteristics of a network, while being speci cally concerned with the performance of the network over time. Motivating applications of INDS problems include infrastructure restoration after extreme events and building humanitarian distribution supply chains. While similar models have been proposed, no one has performed an extensive review of INDS problems from their complexity, network and scheduling characteristics, information, and solution methods. We examine INDS problems under a parallel identical machine scheduling environment where the performance of the network is evaluated by solving classic network optimization problems. We classify that all considered INDS problems as NP-Hard and propose a novel heuristic dispatching rule algorithm that selects and schedules sets of arcs based on their interactions in the network. We present computational analysis based on realistic data sets representing the infrastructures of coastal New Hanover County, North Carolina, lower Manhattan, New York, and a realistic arti cial community CLARC County. These tests demonstrate the importance of a dispatching rule to arrive at near-optimal solutions during real-time decision making activities. We extend INDS problems to incorporate release dates which represent the earliest an operation can be performed and exible release dates through the introduction of specialized machine(s) that can perform work to move the release date earlier in time. An online optimization setting is explored where the release date of a component is not known.

  7. #include #include

    E-Print Network [OSTI]

    Kessler, Christoph

    ] (where a[n] = +infty). C's * bsearch() can't be used, it requires a[j]==key. */ int findloc( void *key Combine­CRCW BSP­Quicksort * variant by Gerbessiotis/Valiant JPDC 22(1994) * implemented in NestStep­C. */ int N=10; // default value /** findloc(): find largest index j in [0..n­1] with * a[j

  8. Incorporating distributed generation into distribution network planning: the challenges and opportunities for distribution network operators 

    E-Print Network [OSTI]

    Wang, David Tse-Chi

    2010-01-01

    Diversification of the energy mix is one of the main challenges in the energy agenda of governments worldwide. Technology advances together with environmental concerns have paved the way for the increasing integration ...

  9. Generalized parton distributions and exclusive processes

    SciTech Connect (OSTI)

    Guzey, Vadim [Hampton U.

    2013-10-01

    ? In last fifteen years, GPDs have emerged as a powerful tool to reveal such aspects of the QCD structure of the nucleon as: - 3D parton correlations and distributions; - spin content of the nucleon. ? Further advances in the field of GPDs and hard exclusive processes rely on: - developments in theory and new methods in phenomenology such as new flexible parameterizations, neural networks, global QCD fits - new high-precision data covering unexplored kinematics: JLab at 6 and 12 GeV, Hermes with recoil detector, Compass, EIC. This slide-show presents: ? Nucleon structure in QCD, particularly hard processes, factorization and parton distributions; and a brief overview of GPD phenomenology, including basic properties of GPDs, GPDs and QCD structure of the nucleon, and constraining GPDs from experiments.

  10. ETH Zurich Distributed Computing Group Stephan Holzer SODA 2012 Stephan Holzer

    E-Print Network [OSTI]

    ETH Zurich ­ Distributed Computing Group Stephan Holzer SODA 2012 Stephan Holzer Silvio Frischknecht Roger Wattenhofer Networks Cannot Compute Their Diameter in Sublinear Time ETH Zurich ­ Distributed Computing Group #12;ETH Zurich ­ Distributed Computing Group Stephan Holzer SODA 2012 Distributed

  11. District heating and cooling systems for communities through power plant retrofit distribution network, Phase 2. Final report, March 1, 1980-January 31, 1984. Volume 5, Appendix A

    SciTech Connect (OSTI)

    Not Available

    1984-01-31

    This volume contains the backup data for the portion of the load and service assessment in Section 2, Volume II of this report. This includes: locations of industrial and commercial establishments, locations of high rise buildings, data from the Newark (Essex County) Directory of Business, data from the Hudson County Industrial Directory, data from the N. J. Department of Energy Inventory of Public Buildings, data on commercial and industrial establishments and new developments in the Hackensack Meadowlands, data on urban redevelopment and Operation Breakthrough, and list of streets in the potential district heating areas of Newark/Harrison and Jersey City/Hoboken.

  12. Power Management in Wireless Networks Kevin Klues

    E-Print Network [OSTI]

    Jain, Raj

    Power Management in Wireless Networks Kevin Klues Abstract This paper presents a survey on the various power saving techniques used in wireless networking today. The work presented covers topics at each layer of a wireless networking protocol stack. The types of wireless networks considered include

  13. Designing Neural Networks Using Gene Expression Programming

    E-Print Network [OSTI]

    Fernandez, Thomas

    1 Designing Neural Networks Using Gene Expression Programming CândidaFerreira Gepsoft, 73 Elmtree aspects of neural networks, such as the weights, the thresholds, and the network architec- ture. Indeed neural network, including the architecture, the weights and thresholds, could be totally encoded

  14. Multiresolution Storage and Search in Sensor Networks

    E-Print Network [OSTI]

    Heidemann, John

    battery-operated nodes. Constructing a storage and search system that satisfies the requirements of dataMultiresolution Storage and Search in Sensor Networks DEEPAK GANESAN University of Massachusetts in wireless sensor networks: in-network storage and distributed search. The need for these techniques arises

  15. Uniform Distribution

    E-Print Network [OSTI]

    randomly and equally likely a point in that interval), the uniform distribution ... Roughly speaking, this means that from any distribution we can create the uniform.

  16. A Content Propagation Metric for Efficient Content Distribution

    E-Print Network [OSTI]

    Keinan, Alon

    A Content Propagation Metric for Efficient Content Distribution Ryan S. Peterson Cornell University@cs.cornell.edu ABSTRACT Efficient content distribution in large networks comprising data- centers, end hosts, and distributed in-network caches is a diffi- cult problem. Existing systems rely on mechanisms and metrics

  17. Tight Bounds for Distributed Functional Monitoring David P. Woodruff

    E-Print Network [OSTI]

    Zhang, Qin

    uses a power-hungry radio [25]; and also by network bandwidth constraints in distributed systems Recent applications in sensor networks and distributed systems have motivated the distributed functional of the Danish National Research Foundation), Aarhus University. 1 #12;of the k streams. We assume

  18. Distributed anonymous function computation in information fusion and multiagent systems

    E-Print Network [OSTI]

    Hendrickx, Julien

    We propose a model for deterministic distributed function computation by a network of identical and anonymous nodes, with bounded computation and storage capabilities that do not scale with the network size. Our goal is ...

  19. A distributed boundary detection algorithm for multi-robot systems

    E-Print Network [OSTI]

    McLurkin, James

    We describe a distributed boundary detection algorithm suitable for use on multi-robot systems with dynamic network topologies. We assume that each robot has access to its local network geometry, which is the combination ...

  20. Geographically distributed environmental sensor system

    DOE Patents [OSTI]

    French, Patrick; Veatch, Brad; O'Connor, Mike

    2006-10-03

    The present invention is directed to a sensor network that includes a number of sensor units and a base unit. The base station operates in a network discovery mode (in which network topology information is collected) in a data polling mode (in which sensed information is collected from selected sensory units). Each of the sensor units can include a number of features, including an anemometer, a rain gauge, a compass, a GPS receiver, a barometric pressure sensor, an air temperature sensor, a humidity sensor, a level, and a radiant temperature sensor.

  1. A reliability assessment methodology for distribution systems with distributed generation 

    E-Print Network [OSTI]

    Duttagupta, Suchismita Sujaya

    2006-08-16

    is associated 11 Fig. 1. Sample Distribution Network with the network response to dynamic and transient failures caused from faults and other disturbances, which could result in widespread cascading outages and loss of stability [11]. This research will focus... and maintain reliable power systems because cost of interruptions and power outages can have severe economic impact on the utility and its customers. At present, the deregulated electric power utilities are being restructured and operated as distinct generation...

  2. Communication and Computation in Distributed CSP Algorithms

    E-Print Network [OSTI]

    Krishnamachari, Bhaskar

    Communication and Computation in Distributed CSP Algorithms C`esar Fern`andez1 , Ram´on B´ejar1 in the context of networked distributed systems. In order to study the performance of Distributed CSP (DisCSP consider two complete DisCSP algorithms: asynchronous backtracking (ABT) and asynchronous weak commitment

  3. Deterministic Scale-Free Networks

    E-Print Network [OSTI]

    Albert-Laszlo Barabasi; Erzsebet Ravasz; Tamas Vicsek

    2002-02-06

    Scale-free networks are abundant in nature and society, describing such diverse systems as the world wide web, the web of human sexual contacts, or the chemical network of a cell. All models used to generate a scale-free topology are stochastic, that is they create networks in which the nodes appear to be randomly connected to each other. Here we propose a simple model that generates scale-free networks in a deterministic fashion. We solve exactly the model, showing that the tail of the degree distribution follows a power law.

  4. A quantum access network

    E-Print Network [OSTI]

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

    2014-09-02

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

  5. Optimal Control of Transient Flow in Natural Gas Networks

    E-Print Network [OSTI]

    Zlotnik, Anatoly; Backhaus, Scott

    2015-01-01

    We outline a new control system model for the distributed dynamics of compressible gas flow through large-scale pipeline networks with time-varying injections, withdrawals, and control actions of compressors and regulators. The gas dynamics PDE equations over the pipelines, together with boundary conditions at junctions, are reduced using lumped elements to a sparse nonlinear ODE system expressed in vector-matrix form using graph theoretic notation. This system, which we call the reduced network flow (RNF) model, is a consistent discretization of the PDE equations for gas flow. The RNF forms the dynamic constraints for optimal control problems for pipeline systems with known time-varying withdrawals and injections and gas pressure limits throughout the network. The objectives include economic transient compression (ETC) and minimum load shedding (MLS), which involve minimizing compression costs or, if that is infeasible, minimizing the unfulfilled deliveries, respectively. These continuous functional optimiza...

  6. Optimization of synchronization in gradient clustered networks

    E-Print Network [OSTI]

    Xingang Wang; Liang Huang; Ying-Cheng Lai; Choy Heng Lai

    2007-11-23

    We consider complex clustered networks with a gradient structure, where sizes of the clusters are distributed unevenly. Such networks describe more closely actual networks in biophysical systems and in technological applications than previous models. Theoretical analysis predicts that the network synchronizability can be optimized by the strength of the gradient field but only when the gradient field points from large to small clusters. A remarkable finding is that, if the gradient field is sufficiently strong, synchronizability of the network is mainly determined by the properties of the subnetworks in the two largest clusters. These results are verified by numerical eigenvalue analysis and by direct simulation of synchronization dynamics on coupled-oscillator networks.

  7. Residual Energy-Aware Cooperative Transmission (REACT) in Wireless Networks

    E-Print Network [OSTI]

    Leung, Kin K.

    Residual Energy-Aware Cooperative Transmission (REACT) in Wireless Networks Erwu Liu, Qinqing Zhang in the network can cooper- ate their transmissions of information to gain energy savings in a distributed network the lifetime of the network and we call the selection method a residual energy-aware cooperative transmission

  8. Computability in Anonymous Networks: Revocable vs. Irrecovable Outputs

    E-Print Network [OSTI]

    Computability in Anonymous Networks: Revocable vs. Irrecovable Outputs Yuval Emek 1 Jochen Seidel 2 Zurich ­ Distributed Computing Group ­ www.disco.ethz.ch #12;Anonymous Networks #12;Computability in Anonymous Networks #12;Computability in Anonymous Networks Computable Not Computable #12;Computability

  9. Network Economics Anna Nagurney

    E-Print Network [OSTI]

    Nagurney, Anna

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

  10. 6.824 Distributed Computer Systems, Fall 2002

    E-Print Network [OSTI]

    Morris, Robert Tappan

    Abstractions and implementation techniques for design of distributed systems; server design, network programming, naming, storage systems, security, and fault tolerance. Readings from current literature. 6 Engineering ...

  11. Adaptive electrocardiogram feature extraction on distributed embedded systems

    E-Print Network [OSTI]

    Jafari, R; Noshadi, H; Ghiasi, S; Sarrafzadeh, M

    2006-01-01

    Approach to Networked Embedded Systems,” PLDI ’03: Proc. ACMON DISTRIBUTED EMBEDDED SYSTEMS Fig. 1. ECG analysismainly interested in embedded system design and analysis and

  12. Fact Sheet: Protecting Intelligent Distributed Power Grids Against...

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

    distribution, IT networks, and control systems-that use automated data analysis and demand response capabilities to increase system functionality, efficiency, and...

  13. Distributed control for optimal reactive power compensation in smart microgrids

    E-Print Network [OSTI]

    Bolognani, Saverio

    2011-01-01

    We consider the problem of optimal reactive power compensation for the minimization of power distribution losses in a smart microgrid. We first propose an approximate model for the power distribution network, which allows us to cast the problem into the class of convex quadratic, linearly constrained, optimization problems. We also show how this model provides the tools for a distributed approach, in which agents have a partial knowledge of the problem parameters and state, and can only perform local measurements. Then, we design a randomized, gossip-like optimization algorithm, providing conditions for convergence together with an analytic characterization of the convergence speed. The analysis shows that the best performance can be achieved when we command cooperation among agents that are neighbors in the smart microgrid topology. Numerical simulations are included to validate the proposed model and to confirm the analytic results about the performance of the proposed algorithm.

  14. Optical Network Testbeds Workshop

    SciTech Connect (OSTI)

    Joe Mambretti

    2007-06-01

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

  15. Community Detection from Location-Tagged Networks

    E-Print Network [OSTI]

    Liu, Zhi

    2015-01-01

    Many real world systems or web services can be represented as a network such as social networks and transportation networks. In the past decade, many algorithms have been developed to detect the communities in a network using connections between nodes. However in many real world networks, the locations of nodes have great influence on the community structure. For example, in a social network, more connections are established between geographically proximate users. The impact of locations on community has not been fully investigated by the research literature. In this paper, we propose a community detection method which takes locations of nodes into consideration. The goal is to detect communities with both geographic proximity and network closeness. We analyze the distribution of the distances between connected and unconnected nodes to measure the influence of location on the network structure on two real location-tagged social networks. We propose a method to determine if a location-based community detection...

  16. Principles of Distributed Data Management in 2020?

    E-Print Network [OSTI]

    Valduriez, Patrick

    2011-01-01

    With the advents of high-speed networks, fast commodity hardware, and the web, distributed data sources have become ubiquitous. The third edition of the \\"Ozsu-Valduriez textbook Principles of Distributed Database Systems [10] reflects the evolution of distributed data management and distributed database systems. In this new edition, the fundamental principles of distributed data management could be still presented based on the three dimensions of earlier editions: distribution, heterogeneity and autonomy of the data sources. In retrospect, the focus on fundamental principles and generic techniques has been useful not only to understand and teach the material, but also to enable an infinite number of variations. The primary application of these generic techniques has been obviously for distributed and parallel DBMS versions. Today, to support the requirements of important data-intensive applications (e.g. social networks, web data analytics, scientific applications, etc.), new distributed data management tech...

  17. Evaluating the SDN control traffic in large ISP networks

    E-Print Network [OSTI]

    the benign "ecosystem" of a large datacenter, where the network design is simplified by the adoption networks could lead to rethink the WAN as a kind of distributed datacenter. Many solutions have been

  18. Better Never than Late: Meeting Deadlines in Datacenter Networks

    E-Print Network [OSTI]

    Almeroth, Kevin C.

    Better Never than Late: Meeting Deadlines in Datacenter Networks Christo Wilson Hitesh Ballani web applications in today's datacenters, combined with their distributed work- flow, leads to deadlines being associated with the datacenter application traffic. A network flow is useful

  19. Priority and fair scheduling in wireless local area networks 

    E-Print Network [OSTI]

    Dugar, Anurag

    2001-01-01

    In recent years, fair scheduling and quality of service (QoS) in Wireless Local Area Networks have received significant attention from the networking research community. This thesis presents a distributed Medium Access Control (MAC) protocol...

  20. Prices include compostable serviceware and linen tablecloths

    E-Print Network [OSTI]

    California at Davis, University of

    APPETIZERS Prices include compostable serviceware and linen tablecloths for the food tables.ucdavis.edu. BUTTERNUT SQUASH & BLACK BEAN ENCHILADAS #12;BUFFETS Prices include compostable serviceware and linen

  1. Fast distributed first-order methods

    E-Print Network [OSTI]

    Chen, I-An, S.M. Massachusetts Institute of Technology

    2012-01-01

    This thesis provides a systematic framework for the development and analysis of distributed optimization methods for multi-agent networks with time-varying connectivity. The goal is to optimize a global objective function ...

  2. Dynamics of spectral algorithms for distributed routing

    E-Print Network [OSTI]

    Maymounkov, Petar (Petar Borissov)

    2012-01-01

    In the past few decades distributed systems have evolved from man-made machines to organically changing social, economic and protein networks. This transition has been overwhelming in many ways at once. Dynamic, heterogeneous, ...

  3. Resilient Networked Control of Distributed Energy Resources

    E-Print Network [OSTI]

    Liberzon, Daniel

    , or the European Commission. February 13, 2012 DRAFT #12;2 I. INTRODUCTION Driven by the US-DoE SmartGrid

  4. Networked Loads in the Distribution Grid

    E-Print Network [OSTI]

    Wang, Zhifang; Li, Xiao; Muthukumar, Vishak; Scaglione, Anna; Peisert, Sean; McParland, Chuck

    2012-01-01

    unknown) @2 Enphase Energy Solar Panel web access TESTower PLC BACnet Solar Panel @ Thompson UC Foundation15 (unknown) @13 Solar Panel @ Miller TES Train BCU CCS/BMS

  5. Resilient Networked Control of Distributed Energy Resources

    E-Print Network [OSTI]

    Hadjicostis, Christoforos

    , or the European Commission. February 10, 2012 DRAFT #12;2 I. INTRODUCTION Driven by the US-DoE SmartGrid

  6. Distributed Environmental Monitoring Using Random Sensor Networks

    E-Print Network [OSTI]

    Simiæ, Slobodan N.

    applications in preventing forest fires, energy conserva- tion, oceanography, building science, etc. We (such as heat sources in the context of forest fires) and notifying the base station which can then take

  7. Distributed fair bandwidth sharing for lambda networks

    E-Print Network [OSTI]

    Wu, Xinran

    2007-01-01

    represents the rate allocation function. This expected raterepresents the rate allocation function. With the regularlyhow to de?ne the rete allocation functions g(·) and h(·) for

  8. Properties of real networks: degree distribution

    E-Print Network [OSTI]

    Albert, Réka

    , 025103(R) (2004) nodes: generators, power stations edges: power lines )K.exp()Kk(P 50> #12;Path length;semilog 20 40 60 80 100 power law P(k) ~ k- exponential P(k) ~ exp(-k/) 10 0 10 1 10 2 10 3 10 -4 10 -3 10;Logarithmic binning 1iii - -= Finding the exponent of a power law may be difficult Logarithmic binning

  9. Networked Loads in the Distribution Grid

    E-Print Network [OSTI]

    Wang, Zhifang; Li, Xiao; Muthukumar, Vishak; Scaglione, Anna; Peisert, Sean; McParland, Chuck

    2012-01-01

    A. Frincke. Smart-Grid Security Issues. IEEE Security &review on smart grid cyber security. Technical Report

  10. Semantic Routed Network for Distributed Search Engines 

    E-Print Network [OSTI]

    Biswas, Amitava

    2011-08-08

    Searching for textual information has become an important activity on the web. To satisfy the rising demand and user expectations, search systems should be fast, scalable and deliver relevant results. To decide which objects ...

  11. Multiwavelength Distribution Networks Hung Q. Ngo

    E-Print Network [OSTI]

    Ngo, Hung Q.

    ]. Consequently, a challenge is to design cost-effective photonic switching fabrics that can scale in size beyond. Other factors in- clude: the numbers of different types of switching components, cross-talk, power for the qualitative and quantitative analyses of wavelength division multiplexed (WDM) multicast/broadcast switching

  12. Downlink Distributed Beamforming Through Relay Networks

    E-Print Network [OSTI]

    Blostein, Steven D.

    of Electrical and Computer Engineering Queen's University, Kingston, Ontario, K7L3N6, Canada Abstract- niques have been considered separately. In this paper, a single source (basestation) with multiple communication devices (nodes) cooperate to improve the quality of communications between source and destination

  13. A Distributed System for Cooperative MIMO Transmissions

    E-Print Network [OSTI]

    Kalyanaraman, Shivkumar

    a distributed system for facilitating cooperative MIMO transmissions in networks without multiple antenna diversity can be leveraged at the network, link or physical layers to provide energy efficient transmissions for reliable low-power transmissions. The rest of this paper is organized as follows: the proposed system

  14. Center for Excellence in Logistics and Distribution

    E-Print Network [OSTI]

    Noble, James S.

    Center for Excellence in Logistics and Distribution (CELDi) James S. Noble, MU Site Director Center Designated Projects Logistics Network Design for Less-than-Truckload Consolidation Helping Green Belts Use What They Know 3 #12;Development of Logistics Efficiency Metrics Supply Chain Networks

  15. Sensor networks for social networks

    E-Print Network [OSTI]

    Farry, Michael P. (Michael Patrick)

    2006-01-01

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

  16. QoS-oriented Integrated Network Planning for Industrial Wireless Sensor Networks

    E-Print Network [OSTI]

    Breu, Ruth

    , Industry Automation Division, Germany {feng.chen,german,dressler}@informatik.uni-erlangen.de Abstract including industrial automation. This also includes Wireless Sensor Network (WSN) technology [1] basedQoS-oriented Integrated Network Planning for Industrial Wireless Sensor Networks Feng Chen

  17. Election in complete asynchronous networks with intermittent link failures 

    E-Print Network [OSTI]

    Lokre, Jahnavi V.

    1991-01-01

    , where ( 1 & f & [" s'J ). CHAPTER II THE MODEL This chapter discusses the model of the distributed network under investigation. Our model follows Goldreich and Shrira's model [13]. Consider a network of n processors. We model the network as a graph.... Initially, no node knows the identifier of any other node. Each node u knows the number of nodes n in the distributed system, the maximum number f of faulty links incident on u, and that the network is complete. A distributed algorithm on a network is a...

  18. Gas Main Sensor and Communications Network System

    SciTech Connect (OSTI)

    Hagen Schempf

    2006-05-31

    Automatika, Inc. was contracted by the Department of Energy (DOE) and with co-funding from the Northeast Gas Association (NGA), to develop an in-pipe natural gas prototype measurement and wireless communications system for assessing and monitoring distribution networks. This projected was completed in April 2006, and culminated in the installation of more than 2 dozen GasNet nodes in both low- and high-pressure cast-iron and steel mains owned by multiple utilities in the northeastern US. Utilities are currently logging data (off-line) and monitoring data in real time from single and multiple networked sensors over cellular networks and collecting data using wireless bluetooth PDA systems. The system was designed to be modular, using in-pipe sensor-wands capable of measuring, flow, pressure, temperature, water-content and vibration. Internal antennae allowed for the use of the pipe-internals as a waveguide for setting up a sensor network to collect data from multiple nodes simultaneously. Sensor nodes were designed to be installed with low- and no-blow techniques and tools. Using a multi-drop bus technique with a custom protocol, all electronics were designed to be buriable and allow for on-board data-collection (SD-card), wireless relaying and cellular network forwarding. Installation options afforded by the design included direct-burial and external polemounted variants. Power was provided by one or more batteries, direct AC-power (Class I Div.2) and solar-array. The utilities are currently in a data-collection phase and intend to use the collected (and processed) data to make capital improvement decisions, compare it to Stoner model predictions and evaluate the use of such a system for future expansion, technology-improvement and commercialization starting later in 2006.

  19. Hierarchical Correctness Proofs Distributed Algorithms

    E-Print Network [OSTI]

    Tuttle, Mark R.

    distributed networks. With this model we are able to construct modular, hierarchical correct- ness proofs these messages and process variables can be extremely di cult, and the resulting proofs of correct- ness of the full algorithm's correct- ness. Some time ago, we began to consider this approach of proof by re nement

  20. Advanced Communication and Control of Distributed Energy Resources at Detroit Edison

    SciTech Connect (OSTI)

    Haukur Asgeirsson; Richard Seguin

    2004-01-31

    The project objective was to create the communication and control system, the process and the economic procedures that will allow owners (e.g., residential, commercial, industrial, manufacturing, etc.) of Distributed Energy Resources (DER) connected in parallel to the electric distribution to have their resources operated in a manner that protects the electric utility distribution network and personnel that may be working on the network. The Distribution Engineering Workstation (DEW) (a power flow and short circuit modeling tool) was modified to calculate the real-time characteristics of the distribution network based on the real-time electric distribution network information and provide DER operating suggestions to the Detroit Edison system operators so that regional electric stability is maintained. Part of the suggestion algorithm takes into account the operational availability of DER’s, which is known by the Energy Aggregator, DTE Energy Technologies. The availability information will be exchanged from DTE Energy Technologies to Detroit Edison. For the calculated suggestions to be used by the Detroit Edison operators, procedures were developed to allow an operator to operate a DER by requesting operation of the DER through DTE Energy Technologies. Prior to issuing control of a DER, the safety of the distribution network and personnel needs to be taken into account. This information will be exchanged from Detroit Edison to DTE Energy Technologies. Once it is safe to control the DER, DTE Energy Technologies will issue the control signal. The real-time monitoring of the DECo system will reflect the DER control. Multi-vendor DER technologies’ representing approximately 4 MW of capacity was monitored and controlled using a web-based communication path. The DER technologies included are a photovoltaic system, energy storage, fuel cells and natural gas/diesel internal combustion engine generators. This report documents Phase I result for the Detroit Edison (Utility) led team, which also includes: DTE Energy Technology (DER provider & Aggregator), Electrical Distribution Design (Virginia Tech company supporting DEW); Systems Integration Specialists Company (real-time protocol integrator); and OSIsoft (software system for managing real-time information). This work was performed in anticipation of being selected for Phase II of the Advanced Communication and Control of Distributed Energy Resources project.

  1. Deploying a Sensor Network in an Extreme Environment K.Martinez, P.Padhy, A.Elsaify, G.Zou, A.Riddoch, J.K. Hart*

    E-Print Network [OSTI]

    Southampton, University of

    powerful distributed processing but many services, such as storage, for sensor networks [6]. This type inside glaciers. This paper describes the solutions to power management, radio communications and other (including small sub- kilogram intelligent tele-robots) [1], aeroplanes [10] and micro-submarines [13

  2. Network Bandwidth Utilization Forecast Model on High Bandwidth Network

    SciTech Connect (OSTI)

    Yoo, Wucherl; Sim, Alex

    2014-07-07

    With the increasing number of geographically distributed scientific collaborations and the scale of the data size growth, it has become more challenging for users to achieve the best possible network performance on a shared network. We have developed a forecast model to predict expected bandwidth utilization for high-bandwidth wide area network. The forecast model can improve the efficiency of resource utilization and scheduling data movements on high-bandwidth network to accommodate ever increasing data volume for large-scale scientific data applications. Univariate model is developed with STL and ARIMA on SNMP path utilization data. Compared with traditional approach such as Box-Jenkins methodology, our forecast model reduces computation time by 83.2percent. It also shows resilience against abrupt network usage change. The accuracy of the forecast model is within the standard deviation of the monitored measurements.

  3. Scaling in topological properties of brain networks

    E-Print Network [OSTI]

    Singh, Soibam Shyamchand; Ishrat, Romana; Sharma, B Indrajit; Singh, R K Brojen

    2015-01-01

    The organization in brain networks shows highly modular features with weak inter-modular interaction. The topology of the networks involves emergence of modules and sub-modules at different levels of constitution governed by fractal laws. The modular organization, in terms of modular mass, inter-modular, and intra-modular interaction, also obeys fractal nature. The parameters which characterize topological properties of brain networks follow one parameter scaling theory in all levels of network structure which reveals the self-similar rules governing the network structure. The calculated fractal dimensions of brain networks of different species are found to decrease when one goes from lower to higher level species which implicates the more ordered and self-organized topography at higher level species. The sparsely distributed hubs in brain networks may be most influencing nodes but their absence may not cause network breakdown, and centrality parameters characterizing them also follow one parameter scaling la...

  4. Distributed Generation

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

    Electricity, US Data. 6. Distributed Generation: Standby Generation and Cogeneration Ozz Energy Solutions, Inc. February 28 th , 2005. For more information about...

  5. Distributed generation

    SciTech Connect (OSTI)

    Ness, E.

    1999-09-02

    Distributed generation, locating electricity generators close to the point of consumption, provides some unique benefits to power companies and customers that are not available from centralized electricity generation. Photovoltaic (PV) technology is well suited to distributed applications and can, especially in concert with other distributed resources, provide a very close match to the customer demand for electricity, at a significantly lower cost than the alternatives. In addition to augmenting power from central-station generating plants, incorporating PV systems enables electric utilities to optimize the utilization of existing transmission and distribution.

  6. DISTRIBUTED OPTIMIZATION AND CONTROL OF OFFSHORE OIL PRODUCTION: THE INTELLIGENT

    E-Print Network [OSTI]

    Foss, Bjarne A.

    DISTRIBUTED OPTIMIZATION AND CONTROL OF OFFSHORE OIL PRODUCTION: THE INTELLIGENT PLATFORM Michael R to distributed optimization and control of offshore oil production systems. The model incorporates a complex pipeline network. Oil and gas production systems are represented as a network of connected hierarchical

  7. Network interdiction with budget constraints

    SciTech Connect (OSTI)

    Santhi, Nankakishore; Pan, Feng

    2009-01-01

    Several scenarios exist in the modern interconnected world which call for efficient network interdiction algorithms. Applications are varied, including computer network security, prevention of spreading of Internet worms, policing international smuggling networks, controlling spread of diseases and optimizing the operation of large public energy grids. In this paper we consider some natural network optimization questions related to the budget constrained interdiction problem over general graphs. Many of these questions turn out to be computationally hard to tackle. We present a particularly interesting practical form of the interdiction question which we show to be computationally tractable. A polynomial time algorithm is then presented for this problem.

  8. Declarative Failure Recovery for Sensor Networks

    E-Print Network [OSTI]

    Gummadi, Ramakrishna; Kothari, Nupur; Millstein, Todd; Govindan, Ramesh

    2007-01-01

    developing wireless embedded systems software. CENS-TR-9,Approach to Networked Embedded Systems. In PLDI 2003. [14]culties of traditional embedded systems, including scale,

  9. Streaming Exascale Data over 100Gbps Networks

    E-Print Network [OSTI]

    Balman, Mehmet

    2014-01-01

    Network   Initiative   (ANI 1 )   supported   by   the  As   a   part   of   the   ANI   project,   ESnet 2  and  In  addition,  the  ANI  project  also  includes  a  

  10. Spatial Scaling of Land Cover Networks

    E-Print Network [OSTI]

    Small, Christopher

    2015-01-01

    Spatial networks of land cover are well-described by power law rank-size distributions. Continuous field proxies for human settlements, agriculture and forest cover have similar spatial scaling properties spanning 4 to 5 orders of magnitude. Progressive segmentation of these continuous fields yields spatial networks with rank-size distributions having slopes near -1 for a wide range of thresholds. We consider a general explanation for this scaling that does not require different processes for each type of land cover. The same conditions that give rise to scale-free networks in general can produce power law distributions of component sizes for bounded spatial networks confined to a plane or surface. Progressive segmentation of a continuous field naturally results in growth of the network while the increasing perimeters of the growing components result in preferential attachment to the larger components with the longer perimeters. Progressive segmentation of two types of random continuous field results in progr...

  11. Cognitive Radio Networks as Sensor Networks

    E-Print Network [OSTI]

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

    2007-01-01

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

  12. The Clouds Distributed Operating System * Partha Dasgupta

    E-Print Network [OSTI]

    Yeom, Heon Young

    The Clouds Distributed Operating System * Partha Dasgupta Dept. of Computer Science and Engg Ramachandran. College of Computing Georgia Tech, Atlanta, GA 30332 Keywords: Distributed Operating Systems operating system that runs on general purpose computers connected via a local­area network. The system

  13. Programmable Agents for Active Distributed Monitoring

    E-Print Network [OSTI]

    Wang, Yongge

    distributed throughout the environment. This makes monitoring an intricate task and complicates the managementProgrammable Agents for Active Distributed Monitoring Ehab S. Al-Shaer Multimedia Networking and describes a programmable agents ap- proach for active monitoring as an important attribute for supporting

  14. DISTRIBUTED DATABASE SYSTEMS M. Tamer zsu

    E-Print Network [OSTI]

    Özsu, M. Tamer

    a database that is distributed across the nodes of a computer network and makes this distribution transparent of consistent and atomic execution against the database. Transparency: Extension of data independence at every site where it executes. The name comes from the fact that two rounds of messages are exchanged

  15. Global interrupt and barrier networks

    DOE Patents [OSTI]

    Blumrich, Matthias A. (Ridgefield, CT); Chen, Dong (Croton-On-Hudson, NY); Coteus, Paul W. (Yorktown Heights, NY); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Kopcsay, Gerard V. (Yorktown Heights, NY); Steinmacher-Burow, Burkhard D. (Mount Kisco, NY); Takken, Todd E. (Mount Kisco, NY)

    2008-10-28

    A system and method for generating global asynchronous signals in a computing structure. Particularly, a global interrupt and barrier network is implemented that implements logic for generating global interrupt and barrier signals for controlling global asynchronous operations performed by processing elements at selected processing nodes of a computing structure in accordance with a processing algorithm; and includes the physical interconnecting of the processing nodes for communicating the global interrupt and barrier signals to the elements via low-latency paths. The global asynchronous signals respectively initiate interrupt and barrier operations at the processing nodes at times selected for optimizing performance of the processing algorithms. In one embodiment, the global interrupt and barrier network is implemented in a scalable, massively parallel supercomputing device structure comprising a plurality of processing nodes interconnected by multiple independent networks, with each node including one or more processing elements for performing computation or communication activity as required when performing parallel algorithm operations. One multiple independent network includes a global tree network for enabling high-speed global tree communications among global tree network nodes or sub-trees thereof. The global interrupt and barrier network may operate in parallel with the global tree network for providing global asynchronous sideband signals.

  16. INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; RADIATION

    Office of Scientific and Technical Information (OSTI)

    interval technical basis document Chiaro, P.J. Jr. 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; RADIATION DETECTORS; RADIATION MONITORS; DOSEMETERS;...

  17. Multiagent Network Security System using FIPA-OS Taraka D. Peddireddy; University of South Carolina; Columbia; South Carolina

    E-Print Network [OSTI]

    Vidal, Jose M.

    Carolina; Columbia; South Carolina Jose M. Vidal, Assistant Professor, University of South Carolina, Columbia, South Carolina Keywords: Multiagent Network Security, Distributed Systems Security, Distributed1 Multiagent Network Security System using FIPA-OS Taraka D. Peddireddy; University of South

  18. CS647: Advanced Topics in Wireless Networks

    E-Print Network [OSTI]

    Amir, Yair

    such as hills, buildings, or vehicles. When MS far from BS, the envelope distribution of received signalCS 647 2.1 CS647: Advanced Topics in Wireless Networks Basics of Wireless Transmission Part II Drs

  19. A Coordinate System for Gaussian Networks

    E-Print Network [OSTI]

    Zheng, Lizhong

    This paper investigates network information theory problems where the external noise is Gaussian distributed. In particular, the Gaussian broadcast channel with coherent fading and the Gaussian interference channel are ...

  20. Maximising renewable hosting capacity in electricity networks 

    E-Print Network [OSTI]

    Sun, Wei

    2015-06-29

    The electricity network is undergoing significant changes in the transition to a low carbon system. The growth of renewable distributed generation (DG) creates a number of technical and economic challenges in the electricity ...

  1. Cathode power distribution system and method of using the same for power distribution

    DOE Patents [OSTI]

    Williamson, Mark A; Wiedmeyer, Stanley G; Koehl, Eugene R; Bailey, James L; Willit, James L; Barnes, Laurel A; Blaskovitz, Robert J

    2014-11-11

    Embodiments include a cathode power distribution system and/or method of using the same for power distribution. The cathode power distribution system includes a plurality of cathode assemblies. Each cathode assembly of the plurality of cathode assemblies includes a plurality of cathode rods. The system also includes a plurality of bus bars configured to distribute current to each of the plurality of cathode assemblies. The plurality of bus bars include a first bus bar configured to distribute the current to first ends of the plurality of cathode assemblies and a second bus bar configured to distribute the current to second ends of the plurality of cathode assemblies.

  2. Google matrix analysis of directed networks

    E-Print Network [OSTI]

    Leonardo Ermann; Klaus M. Frahm; Dima L. Shepelyansky

    2015-06-19

    In past ten years, modern societies developed enormous communication and social networks. Their classification and information retrieval processing become a formidable task for the society. Due to the rapid growth of World Wide Web, social and communication networks, new mathematical methods have been invented to characterize the properties of these networks on a more detailed and precise level. Various search engines are essentially using such methods. It is highly important to develop new tools to classify and rank enormous amount of network information in a way adapted to internal network structures and characteristics. This review describes the Google matrix analysis of directed complex networks demonstrating its efficiency on various examples including World Wide Web, Wikipedia, software architecture, world trade, social and citation networks, brain neural networks, DNA sequences and Ulam networks. The analytical and numerical matrix methods used in this analysis originate from the fields of Markov chains, quantum chaos and Random Matrix theory.

  3. A Multi-Agent Solution to Distribution System Management by Considering Distributed Generators

    E-Print Network [OSTI]

    Zhang, Minjie

    has both advantages and disadvantages [7]. On one hand, DGs can supply power to the network near such as solar and wind, the distribution network may perform differently from the conventionally ex- pected]. Typically, the bulk generation is the only energy resource to a DN, and the direction of the power flow

  4. VLSI Cells Placement Using the Neural Networks

    SciTech Connect (OSTI)

    Azizi, Hacene; Zouaoui, Lamri; Mokhnache, Salah [Universite Ferhat Abbas, Faculte des Sciences Laboratoire Optoelectronique et Composants, Setif(Algeria)

    2008-06-12

    The artificial neural networks have been studied for several years. Their effectiveness makes it possible to expect high performances. The privileged fields of these techniques remain the recognition and classification. Various applications of optimization are also studied under the angle of the artificial neural networks. They make it possible to apply distributed heuristic algorithms. In this article, a solution to placement problem of the various cells at the time of the realization of an integrated circuit is proposed by using the KOHONEN network.

  5. Abstract--Distributed generation (DG) has brought great attention from the power community, especially

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Católica de Chile)

    generation and DFACTS (distribution network Flexible AC Transmission System). In these researches and penetration of DG is affecting power flow of the networks and Distributed FACTS (DFACTS) devices and centralized power stations connected to high and extra- high voltage networks, which in turn, supply power

  6. IEEE ANTS 2012 Tutorial Data Center Networking

    E-Print Network [OSTI]

    Huang, Wei

    ­ Virtual Machine support · Example: Google and its Services 6IEEE ANTS 2012 Tutorial Data Center Networking Cooling Plant in Google's Douglas County, GA Data Center 9IEEE ANTS 2012 Tutorial Data Center Networking, memory, disk ~25% Power infrastructure UPS, cooling, power distribution ~15% Power draw Electrical

  7. An Efficiency Measure for Dynamic Networks with

    E-Print Network [OSTI]

    Nagurney, Anna

    Amherst 13th International Conference on Computing in Economics and Finance13th International Conference on Computing in Economics and Finance Montréal, Quebec, Canada June 14Montréal, Quebec, Canada June 14 -- 16 of Other Dynamic Networks Oil & Natural gas network Electricity generation and distribution

  8. A Retasking Framework For Wireless Sensor Networks

    E-Print Network [OSTI]

    Weigle, Michele

    used in scientific research, industrial manufacturing, and environmental monitoring over the past-effective. In this paper, we present Alert, a software framework for retasking wireless sensor networks, enabling, built upon Deluge [1], is a wireless network code distribution protocol enabling node group management

  9. The Wireless Networking and Communications Group

    E-Print Network [OSTI]

    Heath Jr., - Robert W.

    The Wireless Networking and Communications Group Impact of Spatial Correlation and Distributed Antennas for Massive MIMO Systems Kien T.Truong* and Robert W. Heath Jr. Wireless Networking://www.profheath.org ! * MIMO Wireless Inc. This work was supported by Huawei Technologies #12;2 What is Massive MIMO? A very

  10. Laser diode assembly including a cylindrical lens

    DOE Patents [OSTI]

    Snyder, James J. (San Jose, CA); Reichert, Patrick (Hayward, CA)

    1992-01-01

    The present invention provides a diffraction limited, high numerical aperture (fast) cylindrical microlens. The method for making the microlens is adaptable to produce a cylindrical lens that has almost any shape on its optical surfaces. The cylindrical lens may have a shape, such as elliptical or hyperbolic, designed to transform some particular given input light distribution into some desired output light distribution. In the method, the desired shape is first formed in a glass preform. Then, the preform is heated to the minimum drawing temperature and a fiber is drawn from it. The cross-sectional shape of the fiber bears a direct relation to the shape of the preform from which it was drawn. During the drawing process, the surfaces become optically smooth due to fire polishing.

  11. Laser diode assembly including a cylindrical lens

    DOE Patents [OSTI]

    Snyder, J.J.; Reichert, P.

    1992-01-14

    The present invention provides a diffraction limited, high numerical aperture (fast) cylindrical microlens. The method for making the microlens is adaptable to produce a cylindrical lens that has almost any shape on its optical surfaces. The cylindrical lens may have a shape, such as elliptical or hyperbolic, designed to transform some particular given input light distribution into some desired output light distribution. In the method, the desired shape is first formed in a glass preform. Then, the preform is heated to the minimum drawing temperature and a fiber is drawn from it. The cross-sectional shape of the fiber bears a direct relation to the shape of the preform from which it was drawn. During the drawing process, the surfaces become optically smooth due to fire polishing. 11 figs.

  12. SU-E-T-51: Bayesian Network Models for Radiotherapy Error Detection

    SciTech Connect (OSTI)

    Kalet, A; Phillips, M; Gennari, J [UniversityWashington, Seattle, WA (United States)

    2014-06-01

    Purpose: To develop a probabilistic model of radiotherapy plans using Bayesian networks that will detect potential errors in radiation delivery. Methods: Semi-structured interviews with medical physicists and other domain experts were employed to generate a set of layered nodes and arcs forming a Bayesian Network (BN) which encapsulates relevant radiotherapy concepts and their associated interdependencies. Concepts in the final network were limited to those whose parameters are represented in the institutional database at a level significant enough to develop mathematical distributions. The concept-relation knowledge base was constructed using the Web Ontology Language (OWL) and translated into Hugin Expert Bayes Network files via the the RHugin package in the R statistical programming language. A subset of de-identified data derived from a Mosaiq relational database representing 1937 unique prescription cases was processed and pre-screened for errors and then used by the Hugin implementation of the Estimation-Maximization (EM) algorithm for machine learning all parameter distributions. Individual networks were generated for each of several commonly treated anatomic regions identified by ICD-9 neoplasm categories including lung, brain, lymphoma, and female breast. Results: The resulting Bayesian networks represent a large part of the probabilistic knowledge inherent in treatment planning. By populating the networks entirely with data captured from a clinical oncology information management system over the course of several years of normal practice, we were able to create accurate probability tables with no additional time spent by experts or clinicians. These probabilistic descriptions of the treatment planning allow one to check if a treatment plan is within the normal scope of practice, given some initial set of clinical evidence and thereby detect for potential outliers to be flagged for further investigation. Conclusion: The networks developed here support the use of probabilistic models into clinical chart checking for improved detection of potential errors in RT plans.

  13. Normal Distribution

    E-Print Network [OSTI]

    User

    NORMAL DlSTRlBUTION TABLE. Entries represent the area under the standardized normal distribution from -w to z, Pr(Z

  14. Course may include: Research in Education

    E-Print Network [OSTI]

    Course may include: Research in Education Statistics in Education Theories of Educational Admin Policy Analysis Sociological Aspects of Education Approaches to Literacy Development Information and Communication Technologies Issues in Education Final Project Seminar Master of Education Educational

  15. Networked Computing in Wireless Sensor Networks for Structural Health Monitoring

    E-Print Network [OSTI]

    Jindal, Apoorva

    2010-01-01

    This paper studies the problem of distributed computation over a network of wireless sensors. While this problem applies to many emerging applications, to keep our discussion concrete we will focus on sensor networks used for structural health monitoring. Within this context, the heaviest computation is to determine the singular value decomposition (SVD) to extract mode shapes (eigenvectors) of a structure. Compared to collecting raw vibration data and performing SVD at a central location, computing SVD within the network can result in significantly lower energy consumption and delay. Using recent results on decomposing SVD, a well-known centralized operation, into components, we seek to determine a near-optimal communication structure that enables the distribution of this computation and the reassembly of the final results, with the objective of minimizing energy consumption subject to a computational delay constraint. We show that this reduces to a generalized clustering problem; a cluster forms a unit on w...

  16. Gas storage materials, including hydrogen storage materials

    DOE Patents [OSTI]

    Mohtadi, Rana F; Wicks, George G; Heung, Leung K; Nakamura, Kenji

    2014-11-25

    A material for the storage and release of gases comprises a plurality of hollow elements, each hollow element comprising a porous wall enclosing an interior cavity, the interior cavity including structures of a solid-state storage material. In particular examples, the storage material is a hydrogen storage material, such as a solid state hydride. An improved method for forming such materials includes the solution diffusion of a storage material solution through a porous wall of a hollow element into an interior cavity.

  17. Gas storage materials, including hydrogen storage materials

    DOE Patents [OSTI]

    Mohtadi, Rana F; Wicks, George G; Heung, Leung K; Nakamura, Kenji

    2013-02-19

    A material for the storage and release of gases comprises a plurality of hollow elements, each hollow element comprising a porous wall enclosing an interior cavity, the interior cavity including structures of a solid-state storage material. In particular examples, the storage material is a hydrogen storage material such as a solid state hydride. An improved method for forming such materials includes the solution diffusion of a storage material solution through a porous wall of a hollow element into an interior cavity.

  18. Empirical comparison of network sampling techniques

    E-Print Network [OSTI]

    Blagus, Neli; Bahec, Marko

    2015-01-01

    In the past few years, the storage and analysis of large-scale and fast evolving networks present a great challenge. Therefore, a number of different techniques have been proposed for sampling large networks. In general, network exploration techniques approximate the original networks more accurately than random node and link selection. Yet, link selection with additional subgraph induction step outperforms most other techniques. In this paper, we apply subgraph induction also to random walk and forest-fire sampling. We analyze different real-world networks and the changes of their properties introduced by sampling. We compare several sampling techniques based on the match between the original networks and their sampled variants. The results reveal that the techniques with subgraph induction underestimate the degree and clustering distribution, while overestimate average degree and density of the original networks. Techniques without subgraph induction step exhibit exactly the opposite behavior. Hence, the pe...

  19. Wireless Network architecture for Diagnosis and Monitoring Applications

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Wireless Network architecture for Diagnosis and Monitoring Applications Zeashan Hameed Khan, Jean.Genon-Catalot@iut-valence.fr Abstract-- This paper describes a distributed wireless network architecture for remote diagnosis a wireless network architecture for tele-operation of large industrial applications. Keywords- Wireless

  20. Assessment and Event Based Analysis of Dynamic Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Assessment and Event Based Analysis of Dynamic Wireless Networks Denis Carvin1,2, Guillaume Kremer1 of mobile nodes in networks is significantly changing the way they are managed. Indeed, these wireless-estimation algorithm for wireless mobile networks. We then provide events' collection and distributed mining methods

  1. What Is the Use of Collision Detection (in Wireless Networks)?

    E-Print Network [OSTI]

    What Is the Use of Collision Detection (in Wireless Networks)? Johannes Schneider1 , Roger on the task by investigating three prominent problems for wireless networks, i.e. the maximal independent set constant c. 1 Introduction When studying distributed algorithms for wireless networks, the algorithm de

  2. Percolation Approach to Study Connectivity in Living Neural Networks

    E-Print Network [OSTI]

    Moses, Elisha

    Percolation Approach to Study Connectivity in Living Neural Networks Jordi Soriano, Ilan Breskin distribution and not a power law one. Keywords: neural networks, graphs, connectivity, percolation, giant as the fundamental feature to understand the potential of a living neural network. Unravelling the detailed

  3. A Study of Approximate Data Management Techniques for Sensor Networks

    E-Print Network [OSTI]

    Martin, Ralph R.

    the monitoring operation of sensor nodes by efficiently using their limited energy, bandwidth and computation. The network can therefore be treated as a distributed sensor data management system. Sensor networks differA Study of Approximate Data Management Techniques for Sensor Networks Adonis Skordylis, Niki

  4. CX: A Scalable, Robust Network for Parallel Computing

    E-Print Network [OSTI]

    Cappello, Peter

    CX: A Scalable, Robust Network for Parallel Computing}@cs.ucsb.edu telephone: 805.893.4383; fax: 805.893.853 Abstract CX, a network are distributed throughout the server network via a simple "diffusion" process. CX is intended as a test

  5. ForestFirewalls: Getting Firewall Configuration Right in Critical Networks

    E-Print Network [OSTI]

    Roughan, Matthew

    in Supervisory Control and Data Ac- quisition (SCADA) networks. These networks control the distributed assets-level ap- proach to configuring SCADA firewalls. Our goals are three- fold. We aim to: first, decouple network to demonstrate its effectiveness in simplifying and automating the configuration of SCADA

  6. Prospector: Multiscale Energy Measurement of Networked Embedded Systems with Wideband

    E-Print Network [OSTI]

    of networked, distributed systems, and usually energy-constrained. Moreover, in wirelessly-networked devices, the technological and human cost of energy and replenishment of energy supplies are dominant. Wireless sensor embedded systems. With respect to energy efficiency, wireless sensor network (WSN) nodes are at the leading

  7. Diagnosing Anomalous Network Performance with Confidence

    SciTech Connect (OSTI)

    Settlemyer, Bradley W; Hodson, Stephen W; Kuehn, Jeffery A; Poole, Stephen W

    2011-04-01

    Variability in network performance is a major obstacle in effectively analyzing the throughput of modern high performance computer systems. High performance interconnec- tion networks offer excellent best-case network latencies; how- ever, highly parallel applications running on parallel machines typically require consistently high levels of performance to adequately leverage the massive amounts of available computing power. Performance analysts have usually quantified network performance using traditional summary statistics that assume the observational data is sampled from a normal distribution. In our examinations of network performance, we have found this method of analysis often provides too little data to under- stand anomalous network performance. Our tool, Confidence, instead uses an empirically derived probability distribution to characterize network performance. In this paper we describe several instances where the Confidence toolkit allowed us to understand and diagnose network performance anomalies that we could not adequately explore with the simple summary statis- tics provided by traditional measurement tools. In particular, we examine a multi-modal performance scenario encountered with an Infiniband interconnection network and we explore the performance repeatability on the custom Cray SeaStar2 interconnection network after a set of software and driver updates.

  8. In Neural Networks, vol. 1, S1, p.552, 1988. ON THE EXPEDIENT USE OF NEURAL NETWORKS. Tony

    E-Print Network [OSTI]

    Martinez, Tony R.

    In Neural Networks, vol. 1, S1, p.552, 1988. ON THE EXPEDIENT USE OF NEURAL NETWORKS. Tony Martinez computer, calculators, special purpose logic devices, neural networks, etc. Each differs in its mechanism applications. Neural network features include parallel execution, adaptive learning, generalization, etc

  9. Stochastic Ordering of Interferences in Large-scale Wireless Networks

    E-Print Network [OSTI]

    Lee, Junghoon

    2012-01-01

    Stochastic orders are binary relations defined on probability distributions which capture intuitive notions like being larger or being more variable. This paper introduces stochastic ordering of interference distributions in large-scale networks modeled as point process. Interference is the main performance-limiting factor in most wireless networks, thus it is important to understand its statistics. Since closed-form results for the distribution of interference for such networks are only available in limited cases, interference of networks are compared using stochastic orders, even when closed form expressions for interferences are not tractable. We show that the interference from a large-scale network depends on the fading distributions with respect to the stochastic Laplace transform order. The condition for path-loss models is also established to have stochastic ordering between interferences. The stochastic ordering of interferences between different networks are also shown. Monte-Carlo simulations are us...

  10. Robust Planarization of Unlocalized Wireless Sensor Networks

    E-Print Network [OSTI]

    Jiang, Anxiao "Andrew"

    then, it has also been used in numerous other applications, including data-centric storage, network other applications, including data-centric storage [17], network localization [15] and topology discovery [18] [8] [9]. Here the data-centric storage schemes use the planar graph to help determine

  11. Network Integration of CHP or It's the Network, Stupid! Dr Gareth P. Harrison and Dr A. Robin Wallace

    E-Print Network [OSTI]

    Harrison, Gareth

    from the network which attract a benefit equal to the purchase price of the electricity. Once site is 10 GW by 2010. Current UK installation is some 4.7 GW although a recent study projects that this may, CHP is mainly connected to medium or low voltage electrical distribution networks as distributed

  12. Scramjet including integrated inlet and combustor

    SciTech Connect (OSTI)

    Kutschenreuter, P.H. Jr.; Blanton, J.C.

    1992-02-04

    This patent describes a scramjet engine. It comprises: a first surface including an aft facing step; a cowl including: a leading edge and a trailing edge; an upper surface and a lower surface extending between the leading edge and the trailing edge; the cowl upper surface being spaced from and generally parallel to the first surface to define an integrated inlet-combustor therebetween having an inlet for receiving and channeling into the inlet-combustor supersonic inlet airflow; means for injecting fuel into the inlet-combustor at the step for mixing with the supersonic inlet airflow for generating supersonic combustion gases; and further including a spaced pari of sidewalls extending between the first surface to the cowl upper surface and wherein the integrated inlet-combustor is generally rectangular and defined by the sidewall pair, the first surface and the cowl upper surface.

  13. Electric Power Monthly, August 1990. [Glossary included

    SciTech Connect (OSTI)

    Not Available

    1990-11-29

    The Electric Power Monthly (EPM) presents monthly summaries of electric utility statistics at the national, Census division, and State level. The purpose of this publication is to provide energy decisionmakers with accurate and timely information that may be used in forming various perspectives on electric issues that lie ahead. Data includes generation by energy source (coal, oil, gas, hydroelectric, and nuclear); generation by region; consumption of fossil fuels for power generation; sales of electric power, cost data; and unusual occurrences. A glossary is included.

  14. Variability Aware Network Utility Maximization

    E-Print Network [OSTI]

    Joseph, Vinay

    2011-01-01

    Network Utility Maximization (NUM) provides the key conceptual framework to study resource allocation amongst a collection of users/entities across disciplines as diverse as economics, law and engineering. In network engineering, this framework has been particularly insightful towards understanding how Internet protocols allocate bandwidth, and motivated diverse research on distributed mechanisms to maximize network utility while incorporating new relevant constraints, on energy/power, storage, stability, etc., for systems ranging from communication networks to the smart-grid. However when the available resources and/or users' utilities vary over time, a user's allocations will tend to vary, which in turn may have a detrimental impact on the users' utility or quality of experience. This paper introduces a generalized NUM framework which explicitly incorporates the detrimental impact of temporal variability in a user's allocated rewards. It explicitly incorporates tradeoffs amongst the mean and variability in ...

  15. Analysis and implementation of distributed algorithms for multi-robot systems

    E-Print Network [OSTI]

    McLurkin, James D. (James Dwight), 1972-

    2008-01-01

    Distributed algorithms for multi-robot systems rely on network communications to share information. However, the motion of the robots changes the network topology, which affects the information presented to the algorithm. ...

  16. MOTIVATION INCLUDED OR EXCLUDED FROM Mihaela Cocea

    E-Print Network [OSTI]

    Cocea, Mihaela

    MOTIVATION ­ INCLUDED OR EXCLUDED FROM E-LEARNING Mihaela Cocea National College of Ireland Mayor, Dublin 1, Ireland sweibelzahl@ncirl.ie ABSTRACT The learners' motivation has an impact on the quality-Learning, motivation has been mainly considered in terms of instructional design. Research in this direction suggests

  17. Energy Consumption of Personal Computing Including Portable

    E-Print Network [OSTI]

    Namboodiri, Vinod

    processing unit (CPU) processing power and capacity of mass storage devices doubles every 18 months. Such growth in both processing and storage capabilities fuels the production of ever more powerful portableEnergy Consumption of Personal Computing Including Portable Communication Devices Pavel Somavat1

  18. Course may include: Research in Education

    E-Print Network [OSTI]

    Development Information and Communication Technologies Issues in Education Final Project Seminar Master, the Final Project Seminar. This graduate program will allow you to develop your skills and knowledgeCourse may include: Research in Education Qualitative Methods in Educational Research Fundamentals

  19. Networking Lessons: From Computers to Water Iyswarya Narayanan, Venkatesh Sarangan, Arunchandar Vasan

    E-Print Network [OSTI]

    Srinivasan, Aravind

    Networking Lessons: From Computers to Water Iyswarya Narayanan, Venkatesh Sarangan, Arunchandar- working can be applied in water distribution networks to improve their energy footprint and/or efficiency networking can be used to better water distribution; (ii) we focus on a specific infrastructure enhancement

  20. Statistical properties of position-dependent ball-passing networks in football games

    E-Print Network [OSTI]

    Narizuka, Takuma; Yamazaki, Yoshihiro

    2013-01-01

    Statistical properties of position-dependent ball-passing networks in real football games are examined. We find that the networks have the small-world property, and their degree distributions are fitted well by a truncated gamma distribution function. In order to reproduce these properties of networks, a model based on a Markov chain is proposed.

  1. Distributed Algorithms for Control of Demand Response and Distributed Energy Resources

    E-Print Network [OSTI]

    Dominguez-Garcia, Alejandro

    Distributed Algorithms for Control of Demand Response and Distributed Energy Resources Alejandro D networks. These algorithms are relevant for load curtailment control in demand response programs, and also is currently achieved through demand response programs in which participants, i.e., demand re- sponse resources

  2. Thermalization of gluon matter including ggggg interactions

    E-Print Network [OSTI]

    A. El; C. Greiner; Z. Xu

    2006-09-27

    Within a pQCD inspired kinetic parton cascade we simulate the space time evolution of gluons which are produced initially in a heavy ion collision at RHIC energy. The inelastic gluonic interactions $gg \\leftrightarrow ggg$ do play an important role: For various initial conditions it is found that thermalization and the close to ideal fluid dynamical behaviour sets in at very early times. Special emphasis is put on color glass condensate initial conditions and the `bottom up thermalization' scenario. Off-equilibrium $3\\to 2$ processes make up the very beginning of the evolution leading to an initial decrease in gluon number and a temporary avalanche of the gluon momentum distribution to higher transversal momenta.

  3. Electrochemical system including lamella settler crystallizer

    DOE Patents [OSTI]

    Maimoni, Arturo (Orinda, CA)

    1988-01-01

    A crystallizer which incorporates a lamella settler and which is particularly applicable for use in batteries and power cells for electric vehicles or stationary applications. The lamella settler can be utilized for coarse particle separation or for agglomeration, and is particularly applicable to aluminum-air batteries or power cells for solving the hydrargillite (aluminum-hydroxide) removal problems from such batteries. This invention provides the advantages of very low energy consumption, turbulence, shear, cost and maintenance. Thus, due to the low shear and low turbulence of this invention, it is particularly effective in the control of aluminum hydroxide particle size distribution in the various sections of an aluminum-air system, as will as in other elecrochemical systems requiring separation for phases of different densities.

  4. Advanced mobile networking, sensing, and controls.

    SciTech Connect (OSTI)

    Feddema, John Todd; Kilman, Dominique Marie; Byrne, Raymond Harry; Young, Joseph G.; Lewis, Christopher L.; Van Leeuwen, Brian P.; Robinett, Rush D. III; Harrington, John J.

    2005-03-01

    This report describes an integrated approach for designing communication, sensing, and control systems for mobile distributed systems. Graph theoretic methods are used to analyze the input/output reachability and structural controllability and observability of a decentralized system. Embedded in each network node, this analysis will automatically reconfigure an ad hoc communication network for the sensing and control task at hand. The graph analysis can also be used to create the optimal communication flow control based upon the spatial distribution of the network nodes. Edge coloring algorithms tell us that the minimum number of time slots in a planar network is equal to either the maximum number of adjacent nodes (or degree) of the undirected graph plus some small number. Therefore, the more spread out that the nodes are, the fewer number of time slots are needed for communication, and the smaller the latency between nodes. In a coupled system, this results in a more responsive sensor network and control system. Network protocols are developed to propagate this information, and distributed algorithms are developed to automatically adjust the number of time slots available for communication. These protocols and algorithms must be extremely efficient and only updated as network nodes move. In addition, queuing theory is used to analyze the delay characteristics of Carrier Sense Multiple Access (CSMA) networks. This report documents the analysis, simulation, and implementation of these algorithms performed under this Laboratory Directed Research and Development (LDRD) effort.

  5. Collective network for computer structures

    DOE Patents [OSTI]

    Blumrich, Matthias A; Coteus, Paul W; Chen, Dong; Gara, Alan; Giampapa, Mark E; Heidelberger, Philip; Hoenicke, Dirk; Takken, Todd E; Steinmacher-Burow, Burkhard D; Vranas, Pavlos M

    2014-01-07

    A system and method for enabling high-speed, low-latency global collective communications among interconnected processing nodes. The global collective network optimally enables collective reduction operations to be performed during parallel algorithm operations executing in a computer structure having a plurality of the interconnected processing nodes. Router devices are included that interconnect the nodes of the network via links to facilitate performance of low-latency global processing operations at nodes of the virtual network. The global collective network may be configured to provide global barrier and interrupt functionality in asynchronous or synchronized manner. When implemented in a massively-parallel supercomputing structure, the global collective network is physically and logically partitionable according to the needs of a processing algorithm.

  6. Collective network for computer structures

    DOE Patents [OSTI]

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

    2011-08-16

    A system and method for enabling high-speed, low-latency global collective communications among interconnected processing nodes. The global collective network optimally enables collective reduction operations to be performed during parallel algorithm operations executing in a computer structure having a plurality of the interconnected processing nodes. Router devices ate included that interconnect the nodes of the network via links to facilitate performance of low-latency global processing operations at nodes of the virtual network and class structures. The global collective network may be configured to provide global barrier and interrupt functionality in asynchronous or synchronized manner. When implemented in a massively-parallel supercomputing structure, the global collective network is physically and logically partitionable according to needs of a processing algorithm.

  7. Wireless Sensors and Networks for Advanced Energy Management

    SciTech Connect (OSTI)

    Hardy, J.E.

    2005-05-06

    Numerous national studies and working groups have identified low-cost, very low-power wireless sensors and networks as a critical enabling technology for increasing energy efficiency, reducing waste, and optimizing processes. Research areas for developing such sensor and network platforms include microsensor arrays, ultra-low power electronics and signal conditioning, data/control transceivers, and robust wireless networks. A review of some of the research in the following areas will be discussed: (1) Low-cost, flexible multi-sensor array platforms (CO{sub 2}, NO{sub x}, CO, humidity, NH{sub 3}, O{sub 2}, occupancy, etc.) that enable energy and emission reductions in applications such as buildings and manufacturing; (2) Modeling investments (energy usage and savings to drive capital investment decisions) and estimated uptime improvements through pervasive gathering of equipment and process health data and its effects on energy; (3) Robust, self-configuring wireless sensor networks for energy management; and (4) Quality-of-service for secure and reliable data transmission from widely distributed sensors. Wireless communications is poised to support technical innovations in the industrial community, with widespread use of wireless sensors forecasted to improve manufacturing production and energy efficiency and reduce emissions. Progress being made in wireless system components, as described in this paper, is helping bring these projected improvements to reality.

  8. HEP Science Network Requirements--Final Report

    SciTech Connect (OSTI)

    Bakken, Jon; Barczyk, Artur; Blatecky, Alan; Boehnlein, Amber; Carlson, Rich; Chekanov, Sergei; Cotter, Steve; Cottrell, Les; Crawford, Glen; Crawford, Matt; Dart, Eli; Dattoria, Vince; Ernst, Michael; Fisk, Ian; Gardner, Rob; Johnston, Bill; Kent, Steve; Lammel, Stephan; Loken, Stewart; Metzger, Joe; Mount, Richard; Ndousse-Fetter, Thomas; Newman, Harvey; Schopf, Jennifer; Sekine, Yukiko; Stone, Alan; Tierney, Brian; Tull, Craig; Zurawski, Jason

    2010-04-27

    The Energy Sciences Network (ESnet) is the primary provider of network connectivity for the US Department of Energy Office of Science, the single largest supporter of basic research in the physical sciences in the United States. In support of the Office of Science programs, ESnet regularly updates and refreshes its understanding of the networking requirements of the instruments, facilities, scientists, and science programs that it serves. This focus has helped ESnet to be a highly successful enabler of scientific discovery for over 20 years. In August 2009 ESnet and the Office of High Energy Physics (HEP), of the DOE Office of Science, organized a workshop to characterize the networking requirements of the programs funded by HEP. The International HEP community has been a leader in data intensive science from the beginning. HEP data sets have historically been the largest of all scientific data sets, and the communty of interest the most distributed. The HEP community was also the first to embrace Grid technologies. The requirements identified at the workshop are summarized below, and described in more detail in the case studies and the Findings section: (1) There will be more LHC Tier-3 sites than orginally thought, and likely more Tier-2 to Tier-2 traffic than was envisioned. It it not yet known what the impact of this will be on ESnet, but we will need to keep an eye on this traffic. (2) The LHC Tier-1 sites (BNL and FNAL) predict the need for 40-50 Gbps of data movement capacity in 2-5 years, and 100-200 Gbps in 5-10 years for HEP program related traffic. Other key HEP sites include LHC Tier-2 and Tier-3 sites, many of which are located at universities. To support the LHC, ESnet must continue its collaborations with university and international networks. (3) While in all cases the deployed 'raw' network bandwidth must exceed the user requirements in order to meet the data transfer and reliability requirements, network engineering for trans-Atlantic connectivity is more complex than network engineering for intra-US connectivity. This is because transoceanic circuits have lower reliability and longer repair times when compared with land-based circuits. Therefore, trans-Atlantic connectivity requires greater deployed bandwidth and diversity to ensure reliability and service continuity of the user-level required data transfer rates. (4) Trans-Atlantic traffic load and patterns must be monitored, and projections adjusted if necessary. There is currently a shutdown planned for the LHC in 2012 that may affect projections of trans-Atlantic bandwidth requirements. (5) There is a significant need for network tuning and troubleshooting during the establishment of new LHC Tier-2 and Tier-3 facilities. ESnet will work with the HEP community to help new sites effectively use the network. (6) SLAC is building the CCD camera for the LSST. This project will require significant bandwidth (up to 30Gbps) to NCSA over the next few years. (7) The accelerator modeling program at SLAC could require the movement of 1PB simulation data sets from the Leadership Computing Facilities at Argonne and Oak Ridge to SLAC. The data sets would need to be moved overnight, and moving 1PB in eight hours requires more than 300Gbps of throughput. This requirement is dependent on the deployment of analysis capabilities at SLAC, and is about five years away. (8) It is difficult to achieve high data transfer throughput to sites in China. Projects that need to transfer data in or out of China are encouraged to deploy test and measurement infrastructure (e.g. perfSONAR) and allow time for performance tuning.

  9. Benford's Law Applies To Online Social Networks

    E-Print Network [OSTI]

    Golbeck, Jennifer

    2015-01-01

    Benford's Law states that the frequency of first digits of numbers in naturally occurring systems is not evenly distributed. Numbers beginning with a 1 occur roughly 30\\% of the time, and are six times more common than numbers beginning with a 9. We show that Benford's Law applies to social and behavioral features of users in online social networks. We consider social data from five major social networks: Facebook, Twitter, Google Plus, Pinterest, and Live Journal. We show that the distribution of first significant digits of friend and follower counts for users in these systems follow Benford's Law. The same holds for the number of posts users make. We extend this to egocentric networks, showing that friend counts among the people in an individual's social network also follow the expected distribution. We discuss how this can be used to detect suspicious or fraudulent activity online and to validate datasets.

  10. Bayesian and Maximum Likelihood Neural Networks

    E-Print Network [OSTI]

    Nielsen, Finn Årup

    Bayesian and Maximum Likelihood Neural Networks Finn A ffi rup Nielsen Section for Digital Signal, linear output, Gaussian distribution ] \\Gamma 1;+1[ ffl Binary (binary classification), tanh on output, bino­ mial distribution. ] \\Gamma 1; +1[ ffl Classification, softmax function on outputs [Bridle, 1990

  11. Slotted Programming for Sensor Networks Roland Flury

    E-Print Network [OSTI]

    is not easy either. Embedded systems ask for light software that does not waste resources such as memory- bedded systems. To make matters worse, running heavy distributed systems software on light embedded for networked systems can be painful. Software for distributed systems tends to be heavy, consisting of several

  12. President Obama Announces LPO Support for Distributed Energy...

    Office of Environmental Management (EM)

    Obama Announces LPO Support for Distributed Energy Projects, New Guidance Includes Fuel Cells President Obama Announces LPO Support for Distributed Energy Projects, New...

  13. Broadening Industry Governance to Include Nonproliferation

    SciTech Connect (OSTI)

    Hund, Gretchen; Seward, Amy M.

    2008-11-11

    As industry is the first line of defense in detecting and thwarting illicit trade networks, the engagement of the private sector is critical to any government effort to strengthen existing mechanisms to protect goods and services throughout the supply chain. This study builds on previous PNNL work to continue to evaluate means for greater industry engagement to complement and strengthen existing governmental efforts to detect and stem the trade of illicit goods and to protect and secure goods that could be used in making a weapon of mass destruction. Specifically, the study evaluates the concept of Industry Self Regulation, defined as a systematic voluntary program undertaken by an industry or by individual companies to anticipate, implement, supplement, or substitute for regulatory requirements in a given field, generally through the adoption of best practices. Through a series of interviews with companies with a past history of non-compliance, trade associations and NGOs, the authors identify gaps in the existing regulatory infrastructure, drivers for a self regulation approach and the form such an approach might take, as well as obstacles to be overcome. The authors conclude that it is at the intersection of industry, government, and security that—through collaborative means—the effectiveness of the international nonproliferation system—can be most effectively strengthened to the mutual benefit of both government and the private sector. Industry has a critical stake in the success of this regime, and has the potential to act as an integrating force that brings together the existing mechanisms of the global nonproliferation regime: export controls, physical protection, and safeguards. The authors conclude that industry compliance is not enough; rather, nonproliferation must become a central tenant of a company’s corporate culture and be viewed as an integral component of corporate social responsibility (CSR).

  14. Coordinated Collaboration between Heterogeneous Distributed Energy Resources

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

    Abdollahy, Shahin; Lavrova, Olga; Mammoli, Andrea

    2014-01-01

    A power distribution feeder, where a heterogeneous set of distributed energy resources is deployed, is examined by simulation. The energy resources include PV, battery storage, natural gas GenSet, fuel cells, and active thermal storage for commercial buildings. The resource scenario considered is one that may exist in a not too distant future. Two cases of interaction between different resources are examined. One interaction involves a GenSet used to partially offset the duty cycle of a smoothing battery connected to a large PV system. The other example involves the coordination of twenty thermal storage devices, each associated with a commercial building.more »Storage devices are intended to provide maximum benefit to the building, but it is shown that this can have a deleterious effect on the overall system, unless the action of the individual storage devices is coordinated. A network based approach is also introduced to calculate some type of effectiveness metric to all available resources which take part in coordinated operation. The main finding is that it is possible to achieve synergy between DERs on a system; however this required a unified strategy to coordinate the action of all devices in a decentralized way.« less

  15. Subterranean barriers including at least one weld

    DOE Patents [OSTI]

    Nickelson, Reva A.; Sloan, Paul A.; Richardson, John G.; Walsh, Stephanie; Kostelnik, Kevin M.

    2007-01-09

    A subterranean barrier and method for forming same are disclosed, the barrier including a plurality of casing strings wherein at least one casing string of the plurality of casing strings may be affixed to at least another adjacent casing string of the plurality of casing strings through at least one weld, at least one adhesive joint, or both. A method and system for nondestructively inspecting a subterranean barrier is disclosed. For instance, a radiographic signal may be emitted from within a casing string toward an adjacent casing string and the radiographic signal may be detected from within the adjacent casing string. A method of repairing a barrier including removing at least a portion of a casing string and welding a repair element within the casing string is disclosed. A method of selectively heating at least one casing string forming at least a portion of a subterranean barrier is disclosed.

  16. Photoactive devices including porphyrinoids with coordinating additives

    DOE Patents [OSTI]

    Forrest, Stephen R; Zimmerman, Jeramy; Yu, Eric K; Thompson, Mark E; Trinh, Cong; Whited, Matthew; Diev, Vlacheslav

    2015-05-12

    Coordinating additives are included in porphyrinoid-based materials to promote intermolecular organization and improve one or more photoelectric characteristics of the materials. The coordinating additives are selected from fullerene compounds and organic compounds having free electron pairs. Combinations of different coordinating additives can be used to tailor the characteristic properties of such porphyrinoid-based materials, including porphyrin oligomers. Bidentate ligands are one type of coordinating additive that can form coordination bonds with a central metal ion of two different porphyrinoid compounds to promote porphyrinoid alignment and/or pi-stacking. The coordinating additives can shift the absorption spectrum of a photoactive material toward higher wavelengths, increase the external quantum efficiency of the material, or both.

  17. Power generation method including membrane separation

    DOE Patents [OSTI]

    Lokhandwala, Kaaeid A. (Union City, CA)

    2000-01-01

    A method for generating electric power, such as at, or close to, natural gas fields. The method includes conditioning natural gas containing C.sub.3+ hydrocarbons and/or acid gas by means of a membrane separation step. This step creates a leaner, sweeter, drier gas, which is then used as combustion fuel to run a turbine, which is in turn used for power generation.

  18. Rotor assembly including superconducting magnetic coil

    DOE Patents [OSTI]

    Snitchler, Gregory L. (Shrewsbury, MA); Gamble, Bruce B. (Wellesley, MA); Voccio, John P. (Somerville, MA)

    2003-01-01

    Superconducting coils and methods of manufacture include a superconductor tape wound concentrically about and disposed along an axis of the coil to define an opening having a dimension which gradually decreases, in the direction along the axis, from a first end to a second end of the coil. Each turn of the superconductor tape has a broad surface maintained substantially parallel to the axis of the coil.

  19. Nuclear reactor shield including magnesium oxide

    DOE Patents [OSTI]

    Rouse, Carl A. (Del Mar, CA); Simnad, Massoud T. (La Jolla, CA)

    1981-01-01

    An improvement in nuclear reactor shielding of a type used in reactor applications involving significant amounts of fast neutron flux, the reactor shielding including means providing structural support, neutron moderator material, neutron absorber material and other components as described below, wherein at least a portion of the neutron moderator material is magnesium in the form of magnesium oxide either alone or in combination with other moderator materials such as graphite and iron.

  20. Electric power monthly, September 1990. [Glossary included

    SciTech Connect (OSTI)

    Not Available

    1990-12-17

    The purpose of this report is to provide energy decision makers with accurate and timely information that may be used in forming various perspectives on electric issues. The power plants considered include coal, petroleum, natural gas, hydroelectric, and nuclear power plants. Data are presented for power generation, fuel consumption, fuel receipts and cost, sales of electricity, and unusual occurrences at power plants. Data are compared at the national, Census division, and state levels. 4 figs., 52 tabs. (CK)

  1. Including debris cover effects in a distributed model of glacier ablation

    E-Print Network [OSTI]

    and hydroelectricity generation, and have obvious aesthetic qualities that benefit tourism. However, the international

  2. Covert Communication Networks 

    E-Print Network [OSTI]

    Nix, Timothy Glen

    2013-08-02

    using shared keys assigned by the blender when a new jondo joins the crowd. Tor is the most popular anonymous communications system in use and is known as the second-generation onion router due to the fact that it is based on, and makes several modi... cations to the original onion routing design in terms of security, e - ciency, and deployability [17]. Tor uses a small set of trusted directory servers in order to distribute information about known onion routers in the network. In order to create a...

  3. Poster Abstract: Reliable and Energy-Efficient Bulk-Data Dissemination in Wireless Sensor Networks

    E-Print Network [OSTI]

    Poster Abstract: Reliable and Energy-Efficient Bulk-Data Dissemination in Wireless Sensor Networks of the most common applications of wireless sensor networks. Such networks are an extremely useful tool- suming and costly. Network reprogramming protocols allow to distribute code updates over the wireless

  4. NNPDF2.1: Including heavy quark mass effects in NNPDF fits

    SciTech Connect (OSTI)

    Guffanti, A. [Physikalisches Institut, Albert-Ludwigs-Universitaet Freiburg, Hermann-Herder-Strasse 3, D-79104 Freiburg i. Br. (Germany)

    2011-09-21

    In this contribution we present the NNPDF2.1 parton distribution functions (PDF) set. The NNPDF2.1 set is a set extracted from a global fit to Deep-Inelastic Scattering (DIS), fixed target Drell-Yan (DY), Electroweak vector boson and inclusive jet cross-sections at colliders data. It is performed using the NNPDF methodology which relies on Monte Carlo techniques for determination of uncertainties and Neural Networks as unbiased interpolants.

  5. Energy Efficient Digital Networks

    E-Print Network [OSTI]

    Lanzisera, Steven

    2014-01-01

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

  6. Social networks and research output

    E-Print Network [OSTI]

    Ductor, Lorenzo; Fafchamps, Marcel; Goyal, Sanjeev; van der Leij, Marco J.

    2013-11-12

    and Scheinkman (2002). In recent years, interest has shifted to the ways by which the architecture of social networks influences behavior and outcomes.2 Recent empirical papers on network effects include Bramoulle´, Djebbari and Fortin (2009), Calvo... the length of papers and the duration of the review process in economics, it is reasonable to suppose that collabora- tion entails communication over an extended period of time. These considerations – personal interaction and sustained communication – in turn...

  7. Empirical distribution Theoretical2distribution

    E-Print Network [OSTI]

    Reich, David

    2 distribution. #12;Supplementary Table 1: Simulations using K axes of variation K = 1 K = 2 K = 5 K SNPs 0.4923 0.4916 0.4891 0.4860 Proportion of associations reported as significant by EIGENSTRAT adjusting along the top K axes of variation, for various values of K. #12;Page 2 Supplementary Table 2

  8. Fastpass: A Centralized “Zero-Queue” Datacenter Network

    E-Print Network [OSTI]

    Perry, Jonathan

    An ideal datacenter network should provide several properties, including low median and tail latency, high utilization (throughput), fair allocation of network resources between users or applications, deadline-aware ...

  9. Mobileflow: Applying SDN to Mobility in Wireless Networks 

    E-Print Network [OSTI]

    Al-Shaikhli, Raghdah

    2014-08-10

    Wireless technology has become an increasingly popular way for network access. Wireless networks provide efficient, reliable service; supporting a broad range of emerging applications including multimedia streaming and video conferencing. Currently...

  10. Chapter 6 Continuous Distribution: The Normal Distribution

    E-Print Network [OSTI]

    Hong, Don

    Chapter 6 Continuous Distribution: The Normal Distribution 6.1 Introduction 6.2 Properties of a Normal Distribution 6.3 The Standard Normal Distribution 6.4 Applications of Normal Distribution 6.5 The Central Limit Theorem 6.6 The Normal Approximation to the Binomial Distribution Definition. A continuous

  11. probability distributions

    E-Print Network [OSTI]

    Heller, Barbara

    probabilities in the standard normal table What is the area to the left of Z=1.51 in a standard normal curve? Z=1.51 Z=1.51 Area is 93.45% #12;Exercises · If scores are normally distributed with a mean of 30 beauty of the normal curve: No matter what and are, the area between - and + is about 68%; the area

  12. Hierarchical Network Structure Promotes Dynamical Robustness

    E-Print Network [OSTI]

    Cameron Smith; Raymond S. Puzio; Aviv Bergman

    2015-06-16

    The relationship between network topology and system dynamics has significant implications for unifying our understanding of the interplay among metabolic, gene-regulatory, and ecosystem network architecures. Here we analyze the stability and robustness of a large class of dynamics on such networks. We determine the probability distribution of robustness as a function of network topology and show that robustness is classified by the number of links between modules of the network. We also demonstrate that permutation of these modules is a fundamental symmetry of dynamical robustness. Analysis of these findings leads to the conclusion that the most robust systems have the most hierarchical structure. This relationship provides a means by which evolutionary selection for a purely dynamical phenomenon may shape network architectures across scales of the biological hierarchy.

  13. Multimedia Content Distribution in Hybrid Wireless using Weighted Clustering

    E-Print Network [OSTI]

    Andronache, Adrian; Rothkugel, Steffen

    2007-01-01

    Fixed infrastructured networks naturally support centralized approaches for group management and information provisioning. Contrary to infrastructured networks, in multi-hop ad-hoc networks each node acts as a router as well as sender and receiver. Some applications, however, requires hierarchical arrangements that-for practical reasons-has to be done locally and self-organized. An additional challenge is to deal with mobility that causes permanent network partitioning and re-organizations. Technically, these problems can be tackled by providing additional uplinks to a backbone network, which can be used to access resources in the Internet as well as to inter-link multiple ad-hoc network partitions, creating a hybrid wireless network. In this paper, we present a prototypically implemented hybrid wireless network system optimized for multimedia content distribution. To efficiently manage the ad-hoc communicating devices a weighted clustering algorithm is introduced. The proposed localized algorithm deals with ...

  14. Fault-tolerant battery system employing intra-battery network architecture

    DOE Patents [OSTI]

    Hagen, Ronald A. (Stillwater, MN); Chen, Kenneth W. (Fair Oaks, CA); Comte, Christophe (Montreal, CA); Knudson, Orlin B. (Vadnais Heights, MN); Rouillard, Jean (Saint-Luc, CA)

    2000-01-01

    A distributed energy storing system employing a communications network is disclosed. A distributed battery system includes a number of energy storing modules, each of which includes a processor and communications interface. In a network mode of operation, a battery computer communicates with each of the module processors over an intra-battery network and cooperates with individual module processors to coordinate module monitoring and control operations. The battery computer monitors a number of battery and module conditions, including the potential and current state of the battery and individual modules, and the conditions of the battery's thermal management system. An over-discharge protection system, equalization adjustment system, and communications system are also controlled by the battery computer. The battery computer logs and reports various status data on battery level conditions which may be reported to a separate system platform computer. A module transitions to a stand-alone mode of operation if the module detects an absence of communication connectivity with the battery computer. A module which operates in a stand-alone mode performs various monitoring and control functions locally within the module to ensure safe and continued operation.

  15. Subsampled DPCM system design for speech transmission over lossy packet networks 

    E-Print Network [OSTI]

    Siddiqui, Aqeel Ahmed

    1995-01-01

    various traffic distributions and patterns, can utilize the network efficiently. This is done through the use of statistical multiplexing. A common feature in packet-switched speech transmission networks is the need to discard packets occasionally...

  16. Primal-Dual Interior Point Method Applied to the Short Term Hydroelectric Scheduling Including a

    E-Print Network [OSTI]

    Oliveira, Aurélio R. L.

    Primal-Dual Interior Point Method Applied to the Short Term Hydroelectric Scheduling Including that minimizes losses in the transmission and costs in the generation of a hydroelectric power system, formulated such perturbing parameter. Keywords-- Hydroelectric power system, Network flow, Predispatch, Primal-dual interior

  17. Optical panel system including stackable waveguides

    DOE Patents [OSTI]

    DeSanto, Leonard (Dunkirk, MD); Veligdan, James T. (Manorville, NY)

    2007-11-20

    An optical panel system including stackable waveguides is provided. The optical panel system displays a projected light image and comprises a plurality of planar optical waveguides in a stacked state. The optical panel system further comprises a support system that aligns and supports the waveguides in the stacked state. In one embodiment, the support system comprises at least one rod, wherein each waveguide contains at least one hole, and wherein each rod is positioned through a corresponding hole in each waveguide. In another embodiment, the support system comprises at least two opposing edge structures having the waveguides positioned therebetween, wherein each opposing edge structure contains a mating surface, wherein opposite edges of each waveguide contain mating surfaces which are complementary to the mating surfaces of the opposing edge structures, and wherein each mating surface of the opposing edge structures engages a corresponding complementary mating surface of the opposite edges of each waveguide.

  18. Thermovoltaic semiconductor device including a plasma filter

    DOE Patents [OSTI]

    Baldasaro, Paul F. (Clifton Park, NY)

    1999-01-01

    A thermovoltaic energy conversion device and related method for converting thermal energy into an electrical potential. An interference filter is provided on a semiconductor thermovoltaic cell to pre-filter black body radiation. The semiconductor thermovoltaic cell includes a P/N junction supported on a substrate which converts incident thermal energy below the semiconductor junction band gap into electrical potential. The semiconductor substrate is doped to provide a plasma filter which reflects back energy having a wavelength which is above the band gap and which is ineffectively filtered by the interference filter, through the P/N junction to the source of radiation thereby avoiding parasitic absorption of the unusable portion of the thermal radiation energy.

  19. Simple Model of Membrane Proteins Including Solvent

    E-Print Network [OSTI]

    D. L. Pagan; A. Shiryayev; T. P. Connor; J. D. Gunton

    2006-03-04

    We report a numerical simulation for the phase diagram of a simple two dimensional model, similar to one proposed by Noro and Frenkel [J. Chem. Phys. \\textbf{114}, 2477 (2001)] for membrane proteins, but one that includes the role of the solvent. We first use Gibbs ensemble Monte Caro simulations to determine the phase behavior of particles interacting via a square-well potential in two dimensions for various values of the interaction range. A phenomenological model for the solute-solvent interactions is then studied to understand how the fluid-fluid coexistence curve is modified by solute-solvent interactions. It is shown that such a model can yield systems with liquid-liquid phase separation curves that have both upper and lower critical points, as well as closed loop phase diagrams, as is the case with the corresponding three dimensional model.

  20. 2434 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 8, NO. 5, MAY 2009 Design and Analysis of a Distributed and

    E-Print Network [OSTI]

    Wu, Hongyi

    , distributed wireless network. I. INTRODUCTION WITH its unmatched flexibility to support the commu- nication of a Distributed and Fair Access (DFA) MAC Protocol for Multihop Wireless Networks Lei Pan, Xiaojun Cao, and Hongyi networks. The proposed protocol eliminates several problems existed in the original binary count- down (BCD