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Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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1

Network design and defence  

E-Print Network (OSTI)

Goyal (2007), Jackson (2008) and Vega-Redondo (2007).3 A key issue is the robustness of networks to different types of shocks – natural and man made. This subject is relatively little studied. The contribution of our paper is to build on a classical... by the Designer must be connected. Observe that connectedness of the residual network can be guaranteed by a star network with 1 unit of defence assigned to the centre. This protected network has minimal number of links across all connected net- works and minimal...

Dziubi?ski, Marcin; Goyal, Sanjeev

2013-01-10T23:59:59.000Z

2

RNEDE: Resilient Network Design Environment  

SciTech Connect

Modern living is more and more dependent on the intricate web of critical infrastructure systems. The failure or damage of such systems can cause huge disruptions. Traditional design of this web of critical infrastructure systems was based on the principles of functionality and reliability. However, it is increasingly being realized that such design objectives are not sufficient. Threats, disruptions and faults often compromise the network, taking away the benefits of an efficient and reliable design. Thus, traditional network design parameters must be combined with self-healing mechanisms to obtain a resilient design of the network. In this paper, we present RNEDEa resilient network design environment that that not only optimizes the network for performance but tolerates fluctuations in its structure that result from external threats and disruptions. The environment evaluates a set of remedial actions to bring a compromised network to an optimal level of functionality. The environment includes a visualizer that enables the network administrator to be aware of the current state of the network and the suggested remedial actions at all times.

Venkat Venkatasubramanian, Tanu Malik, Arun Giridh; Craig Rieger; Keith Daum; Miles McQueen

2010-08-01T23:59:59.000Z

3

GLOBAL OPTIMIZATION OF NONLINEAR NETWORK DESIGN 1 ...  

E-Print Network (OSTI)

of nonlinear network design refers to the minimum cost design of resistances on a .... common fluid networks of water, crude oil, natural gas satisfy the above ...

4

Pushing Boundaries on Performance & Design: the ClimateMaster...  

NLE Websites -- All DOE Office Websites (Extended Search)

Boundaries on Performance & Design: the ClimateMaster Trilogy 40 Q-Mode(tm) Geothermal Heat Pump August 01, 2013 The ClimateMaster Trilogy 40 Q-Mode(tm) Geothermal Heat...

5

Design of reliable SONET feeder networks  

Science Conference Proceedings (OSTI)

We address the physical SONET network design problem of selecting stackable, unidirectional rings connecting central office nodes (COs) and remote nodes (RNs). This problem frequently arises in designing feeder transport networks to support centralized ... Keywords: Communications, Heuristic, Integer Programming

June S. Park; Byung Ha Lim; Larry J. Leblanc

2007-03-01T23:59:59.000Z

6

Extending boundaries with meta-design and cultures of participation  

Science Conference Proceedings (OSTI)

Human-computer interaction (HCI) has refocused many research efforts within computer science from a technology-centered view to a human-centered view. The developments so far, however, have seen humans mostly as users and consumers rather than as active ... Keywords: boundaries, control, cultures of participation, distances, meta-design, motivation, socio-technical environments, systemic problems

Gerhard Fischer

2010-10-01T23:59:59.000Z

7

PERCOLATION ON GRAIN BOUNDARY NETWORKS: APPLICATION TO FISSION GAS RELEASE IN NUCLEAR FUELS  

Science Conference Proceedings (OSTI)

The percolation behavior of grain boundary networks is characterized in two- and three-dimensional lattices with circular macroscale cross-sections that correspond to nuclear fuel elements. The percolation of gas bubbles on grain boundaries, and the subsequent percolation of grain boundary networks is the primary mechanism of fission gas release from nuclear fuels. Both radial cracks and radial gradients in grain boundary property distributions are correlated with the fraction of grain boundaries vented to the free surfaces. Our results show that cracks surprisingly do not significantly increase the percolation of uniform grain boundary networks. However, for networks with radial gradients in boundary properties, the cracks can considerably raise the vented grain boundary content.

Paul C. Millett

2012-02-01T23:59:59.000Z

8

Designing manycore processor networks using silicon photonics  

E-Print Network (OSTI)

We present a vertical integration approach for designing silicon photonic networks for communication in manycore systems. Using a top-down approach we project the photonic device requirements for a 64-tile system designed ...

Stojanovic, Vladimir Marko

9

Dual wakeup design for wireless sensor networks  

Science Conference Proceedings (OSTI)

Energy is often identified as the single most important resource in wireless battery-powered sensor networks. While current wakeup schemes in the literature promise to conserve energy in such networks, they apply several assumptions that may not be always ... Keywords: Cyclic block design, Dual wakeup design, Energy conservation, Lonely node, Time-tolerance sensing

Y. F. Wong; L. H. Ngoh; Winston K. G. Seah; Wai-Choong Wong

2009-01-01T23:59:59.000Z

10

Preprint of the paper "A Boundary Element Formulation for the Substation Grounding Design"  

E-Print Network (OSTI)

Preprint of the paper "A Boundary Element Formulation for the Substation Grounding Design" I://caminos.udc.es/gmni #12;A BOUNDARY ELEMENT FORMULATION FOR THE SUBSTATION GROUNDING DESIGN I. Colominas, F. Navarrina A Boundary Element approach for the numerical computation of substation grounding systems is pre- sented

Colominas, Ignasi

11

Large wireless networks : fundamental limits and design issues  

E-Print Network (OSTI)

wireless networks: fundamental limits and design issues Awireless networks: fundamental limits and design issues bythesis we demonstrate how fundamental questions arising in

Minero, Paolo

2010-01-01T23:59:59.000Z

12

EIA - Natural Gas Pipeline Network - Network Configuration & System Design  

U.S. Energy Information Administration (EIA) Indexed Site

Network Configuration & System Design Network Configuration & System Design About U.S. Natural Gas Pipelines - Transporting Natural Gas based on data through 2007/2008 with selected updates Network Configuration and System Design Overview | Transmission/Storage | Design Criteria | Importance of Storage| Overall Pipeline System Configuration Overview A principal requirement of the natural gas transmission system is that it be capable of meeting the peak demand of its shippers who have contracts for firm service. To meet this requirement, the facilities developed by the natural gas transmission industry are a combination of transmission pipelines to bring the gas to the market areas and of underground natural gas storage sites and liquefied natural gas (LNG) peaking facilities located in the market areas.

13

An overview on the Urban Boundary-layer Atmosphere Network in Helsinki  

Science Conference Proceedings (OSTI)

Helsinki UrBAN (Urban Boundary-layer Atmosphere Network, http://urban.fmi.fi) is a dedicated research-grade observational network where we study the physical processes in the atmosphere above the city. Helsinki UrBAN is the most poleward intensive urban ...

Wood CR; Järvi L; Kouznetsov RD; Nordbo A; Joffre S; Drebs A; Vihma T; Hirsikko A; Suomi I; Fortelius C; O'Connor E; Moiseev D; Haapanala S; Moilanen J; Kangas M; Karppinen A; Vesala T; Kukkonen J

14

An Overview of the Urban Boundary Layer Atmosphere Network in Helsinki  

Science Conference Proceedings (OSTI)

The Helsinki Urban Boundary-Layer Atmosphere Network (UrBAN: http://urban.fmi.fi) is a dedicated research-grade observational network where the physical processes in the atmosphere above the city are studied. Helsinki UrBAN is the most poleward intensive ...

C. R. Wood; L. Järvi; R. D. Kouznetsov; A. Nordbo; S. Joffre; A. Drebs; T. Vihma; A. Hirsikko; I. Suomi; C. Fortelius; E. O'Connor; D. Moiseev; S. Haapanala; J. Moilanen; M. Kangas; A. Karppinen; T. Vesala; J. Kukkonen

2013-11-01T23:59:59.000Z

15

The Science DMZ: A Network Design Pattern  

NLE Websites -- All DOE Office Websites (Extended Search)

Science Science DMZ: A Network Design Pattern for Data-Intensive Science Eli Dart Energy Sciences Network Lawrence Berkeley National Laboratory Berkeley, CA 94720 eddart@lbl.gov Lauren Rotman Energy Sciences Network Lawrence Berkeley National Laboratory Berkeley, CA 94720 lbrotman@lbl.gov Brian Tierney Energy Sciences Network Lawrence Berkeley National Laboratory Berkeley, CA 94720 bltierney@lbl.gov Mary Hester Energy Sciences Network Lawrence Berkeley National Laboratory Berkeley, CA 94720 mchester@lbl.gov Jason Zurawski Internet2 Office of the CTO Washington DC, 20036 zurawski@internet2.edu Abstract The ever-increasing scale of scientific data has become a sig- nificant challenge for researchers that rely on networks to interact with remote computing systems and transfer re- sults to collaborators worldwide. Despite the availability of high-capacity connections,

16

Large wireless networks : fundamental limits and design issues  

E-Print Network (OSTI)

design and operation of wireless networks? Unfortunately notWireless Communications: Scaling Laws and Optimal Operation”,

Minero, Paolo

2010-01-01T23:59:59.000Z

17

On cost-effective communication network designing  

E-Print Network (OSTI)

How to efficiently design a communication network is a paramount task for network designing and engineering. It is, however, not a single objective optimization process as perceived by most previous researches, i.e., to maximize its transmission capacity, but a multi-objective optimization process, with lowering its cost to be another important objective. These two objectives are often contradictive in that optimizing one objective may deteriorate the other. After a deep investigation of the impact that network topology, node capability scheme and routing algorithm as well as their interplays have on the two objectives, this letter presents a systematic approach to achieve a cost-effective design by carefully choosing the three designing aspects. Only when routing algorithm and node capability scheme are elegantly chosen can BA-like scale-free networks have the potential of achieving good tradeoff between the two objectives. Random networks, on the other hand, have the built-in character for a cost-effective design, especially when other aspects cannot be determined beforehand.

Guoqiang Zhang

2009-10-12T23:59:59.000Z

18

Preprint of the paper "A Validation of the Boundary Element Method for Grounding Grid Design and  

E-Print Network (OSTI)

- cades for substation grounding analysis, such as the Average Potential Method (APM), have been recentlyPreprint of the paper "A Validation of the Boundary Element Method for Grounding Grid Design://caminos.udc.es/gmni #12;A VALIDATION OF THE BOUNDARY ELEMENT METHOD FOR GROUNDING GRID DESIGN AND COMPUTATION I. Colominas

Colominas, Ignasi

19

Proposal of CSP based Network Design and Construction  

E-Print Network (OSTI)

Proposal of CSP based Network Design and Construction Session:Network and Protocol Short PaperWire network. The design was based on a formal method using CSP ( Communicating Sequential Processes]. In this paper we discuss the reason why we use CSP as a formal design method for the router-network system

Fukunaga, Chikara

20

Adaptive design optimization of wireless sensor networks using genetic algorithms  

Science Conference Proceedings (OSTI)

We present a multi-objective optimization methodology for self-organizing, adaptive wireless sensor network design and energy management, taking into consideration application-specific requirements, communication constraints and energy-conservation characteristics. ... Keywords: Adaptive network design, Energy conservation, Genetic algorithms, Optimal design, Wireless sensor networks

Konstantinos P. Ferentinos; Theodore A. Tsiligiridis

2007-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Review article: Achieving maximum reliability in fault tolerant network design for variable networks  

Science Conference Proceedings (OSTI)

The objective of this paper is to present a novel method to achieve maximum reliability for fault tolerant optimal network design when network has variable size. Reliability calculation is most important and critical component when fault tolerant optimal ... Keywords: Fault tolerant optimal design, Fixed and varying link reliability, Maximizing reliability, Neural networks, Variable network size

B. Kaushik, N. Kaur, A. K. Kohli

2013-07-01T23:59:59.000Z

22

Comparing Metaheuristic Algorithms for Sonet Network Design Problems  

Science Conference Proceedings (OSTI)

This paper considers two problems that arise in the design of optical telecommunication networks when a ring-based topology is adopted, namely the SONET Ring Assignment Problem and the Intraring Synchronous Optical Network Design Problem. We show that ... Keywords: SONET ring, graph partitioning, metaheuristics, optical networks

Roberto Aringhieri; Mauro Dell'Amico

2005-01-01T23:59:59.000Z

23

Design automation of cellular neural networks for data fusion applications  

Science Conference Proceedings (OSTI)

In this study, a novel methodology for the design automation of cellular neural networks (CNNs) for different applications is proposed. In particular, an evolvable algorithm has been developed providing the ability to generate the netlist of the requested ... Keywords: Cellular neural networks, Data fusion, Design automation, Sensor network

Prodromos Chatziagorakis; Georgios Ch. Sirakoulis; John N. Lygouras

2012-02-01T23:59:59.000Z

24

An Underwater Network Testbed: Design, Implementation and Measurement  

E-Print Network (OSTI)

An Underwater Network Testbed: Design, Implementation and Measurement Zheng Peng, Jun-Hong Cui-Lab, an underwater acoustic sensor network lab testbed. Aqua-Lab consists of a water tank, a set of acoustic algorithms and protocols designed for underwater sensor networks. Categories and Subject Descriptors C.2.m

Wang, Bing

25

Physical layer model design for wireless networks  

E-Print Network (OSTI)

Wireless network analysis and simulations rely on accurate physical layer models. The increased interest in wireless network design and cross-layer design require an accurate and efficient physical layer model especially when a large number of nodes are to be studied and building the real network is not possible. For analysis of upper layer characteristics, a simplified physical layer model has to be chosen to model the physical layer. In this dissertation, the widely used two-state Markov model is examined and shown to be deficient for low to moderate signal-to-noise ratios. The physical layer statistics are investigated, and the run length distributions of the good and bad frames are demonstrated to be the key statistics for accurate physical layer modeling. A four-state Markov model is proposed for the flat Rayleigh fading channel by approximating the run length distributions with a mixture of exponential distributions. The transition probabilities in the four-state Markov model can be established analytically without having to run extensive physical layer simulations, which are required for the two-state Markov model. Physical layer good and bad run length distributions are compared and it is shown that the four-state Markov model reasonably approximates the run length distributions. Ns2 simulations are performed and the four-state Markov model provides a much more realistic approximation compared to the popular two-state Markov model. Achieving good results with the flat Rayleigh fading channel, the proposed four-state Markov model is applied to a few diversity channels. A coded orthogonal fre- quency division multiplexing (OFDM) system with a frequency selective channel and the Alamouti multiple-input multiple-output system are chosen to verify the accuracy of the four-state Markov model. The network simulation results show that the four-state Markov model approximates the physical layer with diversity channel well whereas the traditional two-state Markov model estimates the network throughput poorly. The success of adapting the four-state Markov model to the diversity channel also shows the flexibility of adapting the four-state Markov model to various channel conditions.

Yu, Yi

2006-08-01T23:59:59.000Z

26

Analysis and monitoring design for networks  

Science Conference Proceedings (OSTI)

The idea of applying experimental design methodologies to develop monitoring systems for computer networks is relatively novel even though it was applied in other areas such as meteorology, seismology, and transportation. One objective of a monitoring system should always be to collect as little data as necessary to be able to monitor specific parameters of the system with respect to assigned targets and objectives. This implies a purposeful monitoring where each piece of data has a reason to be collected and stored for future use. When a computer network system as large and complex as the Internet is the monitoring subject, providing an optimal and parsimonious observing system becomes even more important. Many data collection decisions must be made by the developers of a monitoring system. These decisions include but are not limited to the following: (1) The type data collection hardware and software instruments to be used; (2) How to minimize interruption of regular network activities during data collection; (3) Quantification of the objectives and the formulation of optimality criteria; (4) The placement of data collection hardware and software devices; (5) The amount of data to be collected in a given time period, how large a subset of the available data to collect during the period, the length of the period, and the frequency of data collection; (6) The determination of the data to be collected (for instance, selection of response and explanatory variables); (7) Which data will be retained and how long (i.e., data storage and retention issues); and (8) The cost analysis of experiments. Mathematical statistics, and, in particular, optimal experimental design methods, may be used to address the majority of problems generated by 3--7. In this study, the authors focus their efforts on topics 3--5.

Fedorov, V.; Flanagan, D.; Rowan, T.; Batsell, S.

1998-06-01T23:59:59.000Z

27

Designing a Demand Response Business Network for California  

NLE Websites -- All DOE Office Websites (Extended Search)

Designing a Demand Response Business Network for California Speaker(s): Ali Vojdani Date: March 8, 2005 - 12:00pm Location: Bldg. 90 The Demand Response Business Network (DRBizNet)...

28

Energy Mobility Network : system design, interfaces, and future interactions  

E-Print Network (OSTI)

The Energy Mobility Network is a mobile, networked energy production, consumption and sharing system that is designed to motivate users to be more aware of their energy consumption. In particular, the system provides a ...

Cheung, Natalie Wen Yua

2011-01-01T23:59:59.000Z

29

Design issues for mixed media packet switching networks  

Science Conference Proceedings (OSTI)

In this paper we present some of the important design issues for packet switching networks with both satellite and terrestrial components---which we call mixed media packet switching networks. Satellite packet switching has considerable promise ...

D. Huynh; H. Kobayashi; F. F. Kuo

1976-06-01T23:59:59.000Z

30

New generation network architecture and software design  

Science Conference Proceedings (OSTI)

This article deals with new telecommunications networks, the reasons for changes, and the options telecommunications are facing today. The new generation of network architecture is discussed, and two network evolution case studies are presented as well ...

A. Caric; K. Toivo

2000-02-01T23:59:59.000Z

31

Electronic design automation for social networks  

Science Conference Proceedings (OSTI)

Online social networks are a growing internet phenomenon: they connect millions of individuals through sharing of common interests, political and religious views, careers, etc. Social networking websites are observing an ever-increasing number ... Keywords: EDA algorithms, social networks, verification

Andrew DeOrio; Valeria Bertacco

2010-06-01T23:59:59.000Z

32

Incremental Network Design with Shortest Paths  

E-Print Network (OSTI)

We compare the following three strategies ... For the third strategy we get .... Rather than considering network expansion, we can consider network maintenance.

33

Global Facility Network Design with Transshipment and Responsive Pricing  

Science Conference Proceedings (OSTI)

This paper considers the facility network design problem for a global firm that sells to two markets: the domestic market and a foreign market. Although the firm has to invest in capital-intensive production facilities and produce outputs in the face ... Keywords: global facility network, global operations management, newsvendor network, operations strategy, responsive pricing, supply chain management, transshipment

Lingxiu Dong; Panos Kouvelis; Ping Su

2010-04-01T23:59:59.000Z

34

INTEGRATED DESIGN AND CONTROL OF HEAT EXCHANGER NETWORKS  

E-Print Network (OSTI)

INTEGRATED DESIGN AND CONTROL OF HEAT EXCHANGER NETWORKS #12; by Knut Wiig Mathisen A Thesis examples in their research attitudes. Truls also introduced me to heat exchanger networks, and has been have worked closely together with John Ulvøy on a paper on heat exchanger network synthesis

Skogestad, Sigurd

35

Design optimization of wastewater collection networks by PSO  

Science Conference Proceedings (OSTI)

Optimal design of wastewater collection networks is addressed in this paper by making use of the so-called PSO (Particle Swarm Optimization) technique. This already popular evolutionary technique is adapted for dealing both with continuous and discrete ... Keywords: Dynamic programming, Evolutionary method, Optimal design, Particle Swarm Optimization, Wastewater collection networks

Joaquín Izquierdo; Idel Montalvo; Rafael Pérez; Vicente S. Fuertes

2008-08-01T23:59:59.000Z

36

CellDesigner: a modeling tool for biochemical networks  

Science Conference Proceedings (OSTI)

Understanding of logic and dynamics of gene-regulatory and biochemical networks is a major challenge of systems biology. To facilitate this research topic, we have developed CellDesigner, a modeling tool of gene-regulatory and biochemical networks. CellDesigner ...

Akira Funahashi; Yukiko Matsuoka; Akiya Jouraku; Hiroaki Kitano; Norihiro Kikuchi

2006-12-01T23:59:59.000Z

37

Communication Reliability in Network on Chip Designs  

E-Print Network (OSTI)

The performance of low latency Network on Chip (NoC) architectures, which incorporate fast bypass paths to reduce communication latency, is limited by crosstalk induced skewing of signal transitions on link wires. As a result of crosstalk interactions between wires, signal transitions belonging to the same flit or bit vector arrive at the destination at different times and are likely to violate setup and hold time constraints for the design. This thesis proposes a two-step technique: TransSync- RecSync, to dynamically eliminate packet errors resulting from inter-bit-line transition skew. The proposed approach adds minimally to router complexity and involves no wire overhead. The actual throughput of NoC designs with asynchronous bypass designs is evaluated and the benefits of augmenting such schemes with the proposed design are studied. The TransSync, TransSync-2-lines and RecSync schemes described here are found to improve the average communication latency by 26%, 20% and 38% respectively in a 7X7 mesh NoC with asynchronous bypass channel. This work also evaluates the bit-error ratio (BER) performance of several existing crosstalk avoidance and error correcting schemes and compares them to that of the proposed schemes. Both TransSync and RecSync scheme are dynamic in nature and can be switched on and off on-the-fly. The proposed schemes can therefore be employed to impart unequal error protection (UEP) against intra-flit skewing on NoC links. In the UEP, a larger fraction of the energy budget is spent in providing protection to those parts of the data being transmitted on the link which have a higher priority, while expending smaller effort in protecting relatively less important parts of the data. This allows us to achieve the prescribed level of performance with lower levels of power. The benefits of the presented technique are illustrated using an H.264 video decoder system-on-chip (SoC) employing NoC architecture. We show that for Akyio test streams transmitted over 3mm long link wires, the power consumption can be reduced by as much as 20% at the cost of an acceptable degradation in average peak signal to noise ratio (PSNR) with UEP.

Kumar, Reeshav

2011-08-01T23:59:59.000Z

38

Combinatorial structures for design of wireless sensor networks  

Science Conference Proceedings (OSTI)

Combinatorial designs are very effective tools for managing keys in an infrastructure where power and memory are two major constraints. None of the present day wireless technologies takes the advantage of combinatorial designs. In this paper, we have ... Keywords: combinatorial design, key predistribution, projective plane, sensor network, transversal design

Dibyendu Chakrabarti; Jennifer Seberry

2006-06-01T23:59:59.000Z

39

An effect of the networks of the subgrain boundaries on spectral responses of thick CdZnTe detectors  

Science Conference Proceedings (OSTI)

CdZnTe (CZT) crystals used for nuclear-radiation detectors often contain high concentrations of subgrain boundaries and networks of poligonized dislocations that can significantly degrade the performance of semiconductor devices. These defects exist in all commercial CZT materials, regardless of their growth techniques and their vendor. We describe our new results from examining such detectors using IR transmission microscopy and white X-ray beam diffraction topography. We emphasize the roles on the devices performances of networks of subgrain boundaries with low dislocation densities, such as poligonized dislocations and mosaic structures. Specifically, we evaluated their effects on the gamma-ray responses of thick, >10 mm, CZT detectors. Our findings set the lower limit on the energy resolution of CZT detectors containing dense networks of subgrain boundaries, and walls of dislocations.

Bolotnikov, A.; Butcher, J.; Camarda, G.; Cui, Y.; Egarievwe, S.; Fochuk, P.; Gul,R.; Hamade, M.; Hossain, A.; Kim, K.; Kopach,O.; Petryk, M.; Raghothamachar, B.; Yang, G.; and James, R.B.

2011-08-12T23:59:59.000Z

40

Design Technology for Networked Reconfigurable FPGA Platforms  

E-Print Network (OSTI)

Future networked appliances should be able to download new services or upgrades from the network and execute them locally. This flexibility is typically achieved by processors that can download new software over the network, using JAVA technology. This paper demonstrates that FPGAs are a realistic implementation platform for thin server or client applications. FPGAs can offer the same end-user experience as software based systems, combined with more computational power and lower cost.

S. Guccione; D. Verkest; I. Bolsens

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Pushing Boundaries on Performance & Design: the ClimateMaster Trilogy 40  

NLE Websites -- All DOE Office Websites (Extended Search)

Pushing Boundaries on Performance & Design: the ClimateMaster Trilogy® 40 Pushing Boundaries on Performance & Design: the ClimateMaster Trilogy® 40 Q-Mode(tm) Geothermal Heat Pump August 01, 2013 The ClimateMaster Trilogy® 40 Q-Mode(tm) Geothermal Heat Pump, is the result of a 5 year collaboration between ClimateMaster, Inc. and Oak Ridge National Laboratory (ORNL). The unit reduces energy consumption by combining 3 variable speed technologies: an inverter-driven compressor, indoor air blower, and water pump. Introduced July 9, 2012, and available for limited order in December 2012, the ClimateMaster Trilogy® 40 Q-Mode(tm) Geothermal Heat Pump, the outcome of a 5 year collaboration between ClimateMaster, Inc., and Oak Ridge National Laboratory (ORNL), is an ultrahigh-efficiency geothermal heat pump that pro- vides space heating, cooling, and water heating.

42

Pushing the Boundaries in Energy Technbology: Materials Design for Battery Applications  

NLE Websites -- All DOE Office Websites (Extended Search)

Pushing the Boundaries in Energy Technology: Materials Design for Battery Applications" Pushing the Boundaries in Energy Technology: Materials Design for Battery Applications" Co-Organizers: Elena Shevchenko (CNM), Mitra Taheri (Drexel University), and Mali Balasubramanian (APS) Batteries are a key element for storing and supplying energy. Transformational battery technologies require tailoring novel materials and/or incorporating new chemical processes. Energy storage devices are intrinsically complex with the relevant materials processes covering time-scales from picoseconds to years and length-scales from angstroms to millimeters. Advanced x-ray and electron microscopy methods have opened a new window by which vital structural and electronic properties of battery materials can be obtained at the appropriate spatio- temporal scales using spectroscopic, scattering and imaging techniques under real world

43

Grain boundary networks in high-performance, heteroepitaxial, YBCO films on polycrystalline, cube-textured metals  

SciTech Connect

Grain boundaries (GBs) in high-temperature superconductors suppress the critical current density (Jc) dramatically [1-3]. The Jc drops exponentially when GB-misorientation exceeds 4 [3]. To reduce the number of high-angle GBs, fabrication of biaxially-textured, superconducting wires via epitaxial growth on cube-textured metals has been widely investigated [4-6]. Such wires have exhibited very high-Jc in applied magnetic fields despite having a majority of GBs with total misorientations greater than 4 . Here we show that GB networks in these wires have numerous GBs with out-of-plane misorientations > 4 and few boundaries having in-plane misorientations > 4 . The high performance can be explained if the Jc is determined primarily by in-plane misorientations. This supposition was confirmed by in-field transport measurements on artificially fabricated bicrystals of superconductors having only out-of-plane misorientations. Atomic resolution imaging of bicrystals with out-of-plane misorientations show that superconducting ab-planes are continuous across such GBs in contrast to GBs with in-plane misorientations.

Goyal, Amit [ORNL; Field, Dr. David [Washington State University; Held, R. [Institute of Physics, Augsburg University, Augsburg, Germany; Mannhart, J. [Institute of Physics, Augsburg University, Augsburg, Germany

2011-01-01T23:59:59.000Z

44

A switch wrapper design for SNA on-chip-network  

Science Conference Proceedings (OSTI)

In this paper we present a design of a switch wrapper as a component of SNA (SoC network architecture), which is an efficient on-chip-network compared to a shared bus architecture in a SoC. The SNA uses crossbar routers to provide the increasing demand ...

Jiho Chang; Jongsu Yi; JunSeong Kim

2005-10-01T23:59:59.000Z

45

Towards automated design of MAC protocols for underwater wireless networks  

Science Conference Proceedings (OSTI)

We present a framework for the automated design of MAC protocols for underwater acoustic wireless networks. We formulate a protocol optimization problem in which the exchange of control packets is explicitly modeled. A protocol optimization program generates ... Keywords: automation, mac, network, wireless underwater protocol

Volkan Rodoplu; Amir Aminzadeh Gohari; Wei Tang

2008-09-01T23:59:59.000Z

46

Solar powered sensor network design and experimentation  

Science Conference Proceedings (OSTI)

As battery capacities are a key limiting factor of wireless sensor networks, harvesting energy from the environment is very attractive. For outdoor applications, solar power seems to be the best suited energy source. However, the amount of energy delivered ...

Daniela Krüger; Carsten Buschmann; Stefan Fischer

2009-09-01T23:59:59.000Z

47

Imbibition well stimulation via neural network design  

SciTech Connect

A method for stimulation of hydrocarbon production via imbibition by utilization of surfactants. The method includes use of fuzzy logic and neural network architecture constructs to determine surfactant use.

Weiss, William (Socorro, NM)

2007-08-14T23:59:59.000Z

48

Informing Hydrometric Network Design for Statistical Seasonal Streamflow Forecasts  

Science Conference Proceedings (OSTI)

A hydrometric network design approach is developed for enhancing statistical seasonal streamflow forecasts. The approach employs gridded, model-simulated water balance variables as predictors in equations generated via principal components ...

Eric A. Rosenberg; Andrew W. Wood; Anne C. Steinemann

2013-10-01T23:59:59.000Z

49

TDM MAC protocol design and implementation for wireless mesh networks  

Science Conference Proceedings (OSTI)

We present the design, implementation, and evaluation of a Time Division Multiplex (TDM) MAC protocol for multi-hop wireless mesh networks using a programmable wireless platform. Extensive research has been devoted to optimal scheduling algorithms for ...

Dimitrios Koutsonikolas; Theodoros Salonidis; Henrik Lundgren; Pascal LeGuyadec; Y. Charlie Hu; Irfan Sheriff

2008-12-01T23:59:59.000Z

50

Optimization for Design and Operation of Natural Gas Transmission Networks  

E-Print Network (OSTI)

This study addresses the problem of designing a new natural gas transmission network or expanding an existing network while minimizing the total investment and operating costs. A substantial reduction in costs can be obtained by effectively designing and operating the network. A well-designed network helps natural gas companies minimize the costs while increasing the customer service level. The aim of the study is to determine the optimum installation scheduling and locations of new pipelines and compressor stations. On an existing network, the model also optimizes the total flow through pipelines that satisfy demand to determine the best purchase amount of gas. A mixed integer nonlinear programming model for steady-state natural gas transmission problem on tree-structured network is introduced. The problem is a multi-period model, so changes in the network over a planning horizon can be observed and decisions can be made accordingly in advance. The problem is modeled and solved with easily accessible modeling and solving tools in order to help decision makers to make appropriate decisions in a short time. Various test instances are generated, including problems with different sizes, period lengths and cost parameters, to evaluate the performance and reliability of the model. Test results revealed that the proposed model helps to determine the optimum number of periods in a planning horizon and the crucial cost parameters that affect the network structure the most.

Dilaveroglu, Sebnem 1986-

2012-12-01T23:59:59.000Z

51

Design and Analysis of Low Complexity Network Coding Schemes  

E-Print Network (OSTI)

In classical network information theory, information packets are treated as commodities, and the nodes of the network are only allowed to duplicate and forward the packets. The new paradigm of network coding, which was introduced by Ahlswede et al., states that if the nodes are permitted to combine the information packets and forward a function of them, the throughput of the network can dramatically increase. In this dissertation we focused on the design and analysis of low complexity network coding schemes for different topologies of wired and wireless networks. In the first part we studied the routing capacity of wired networks. We provided a description of the routing capacity region in terms of a finite set of linear inequalities. We next used this result to study the routing capacity region of undirected ring networks for two multimessage scenarios. Finally, we used new network coding bounds to prove the optimality of routing schemes in these two scenarios. In the second part, we studied node-constrained line and star networks. We derived the multiple multicast capacity region of node-constrained line networks based on a low complexity binary linear coding scheme. For star networks, we examined the multiple unicast problem and offered a linear coding scheme. Then we made a connection between the network coding in a node-constrained star network and the problem of index coding with side information. In the third part, we studied the linear deterministic model of relay networks (LDRN). We focused on a unicast session and derived a simple capacity-achieving transmission scheme. We obtained our scheme by a connection to the submodular flow problem through the application of tools from matroid theory and submodular optimization theory. We also offered polynomial-time algorithms for calculating the capacity of the network and the optimal coding scheme. In the final part, we considered the multicasting problem in an LDRN and proposed a new way to construct a coding scheme. Our construction is based on the notion of flow for a unicast session in the third part of this dissertation. We presented randomized and deterministic polynomial-time versions of our algorithm.

Tabatabaei-Yazdi, Seyed

2011-08-01T23:59:59.000Z

52

Designing and Supporting Computer Networks, CCNA Discovery Learning Guide (Companion Guide), 1 Pap/Cdr edition  

Science Conference Proceedings (OSTI)

Designing and Supporting Computer Networks CCNA Discovery Learning Guide Kenneth D. Stewart III Aubrey Adams Designing and Supporting Computer Networks, CCNA Discovery Learning Guide is the official supplemental textbook for the Designing and Supporting ...

Kenneth Stewart; Aubrey Adams; Allan Reid; Jim Lorenz

2008-05-01T23:59:59.000Z

53

A BOUNDARY ELEMENT FORMULATION FOR THE COMPUTER DESIGN OF SUBSTATION I. Colominas, F. Navarrina, and M. Casteleiro  

E-Print Network (OSTI)

A BOUNDARY ELEMENT FORMULATION FOR THE COMPUTER DESIGN OF SUBSTATION GROUNDING I. Colominas, F approach for the numerical com- putation of substation grounding systems is presented. In this general formulation has been implemented in a speci#12;c Computer Aided Design system for ground- ing analysis

Colominas, Ignasi

54

On the Design of Clean-Slate Network Control and  

E-Print Network (OSTI)

We provide a design of clean-slate control and management plane for data networks using the abstraction of 4D architecture, utilizing and extending 4D’s concept of a logically centralized Decision plane that is responsible for managing network-wide resources. In this paper, a scalable protocol and a dynamically adaptable algorithm for assigning Data plane devices to a physically distributed Decision plane are investigated, that enable a network to operate with minimal configuration and human intervention while providing optimal convergence and robustness against failures. Our work is especially relevant in the context of ISPs and large geographically dispersed enterprise networks. We also provide an extensive evaluation of our algorithm using real-world and artificially generated ISP topologies along with an experimental evaluation using ns-2 simulator. This research was sponsored by the NSF under ITR Award ANI-0426886. 1

Hammad Iqbal; Taieb Znati

2009-01-01T23:59:59.000Z

55

Gaussian sum approach with optimal experiment design for neural network  

Science Conference Proceedings (OSTI)

System identification is a discipline for construction of mathematical models of stochastic systems based on measured experimental data. Significant role in the system identification plays a selection of input signal which influences quality of obtained ... Keywords: multi-layer perceptron network, nonlinear parameters estimation, optimal experiment design, probability density function, system identification

Pavel Hering; Miroslav Šimandl

2007-08-01T23:59:59.000Z

56

Designing a Peer-to-Peer Wireless Network Confederation  

E-Print Network (OSTI)

We present the Peer-to-Peer Wireless Network Confederation (P2PWNC), a P2P system designed to enable the sharing of WLAN bandwidth among residential hotspots. The benefits of joining the Confederation outweigh the costs, and its token-based incentive mechanism prevents free-riding.

Elias Efstathiou And; Elias C. Efstathiou; George C. Polyzos

2003-01-01T23:59:59.000Z

57

Design, Simulation, and Analysis of Substation Automation Networks  

E-Print Network (OSTI)

Society depends on computer networks for communication. The networks were built to support and facilitate several important applications such as email, web browsing and instant messaging. Recently, there is a significant interest in leveraging modern local and wide area communication networks for improving reliability and performance in critical infrastructures. Emerging critical infrastructure applications, such as smart grid, require a certain degree of reliability and Quality of Service (QoS). Supporting these applications requires network protocols that enable delay sensitive packet delivery and packet prioritization. However, most of the traditional networks are designed to provide best effort service without any support for QoS. The protocols used in these networks do not support packet prioritization, delay requirements and reliability. In this thesis, we focus on the design and analysis of communication protocols for supporting smart grid applications. In particular, we focus on the Substation Automation Systems (SAS). Substations are nodes in the smart grid infrastructure that help the in transportation of power by connecting the transmission and distribution lines. The SAS applications are con figured to operate with minimal human intervention. The SAS monitors the line loads continuously. If the load values are too high and can lead to damage, the SAS declares those conditions as faults. On fault detection, the SAS must take care of the communication with the relay to open the circuit to prevent any damage. These messages are of high priority and require reliable, delay sensitive delivery. There is a threshold for the delay of these messages, and a slight increase in the delay above the threshold might cause severe damages. Along with such high priority messages, the SAS has a lot of background traffic as well. In spite of the background traffic, the substation network must take care of delivering the priority messages on time. Hence, the network plays a vital role in the operation of the substation. Networks designed for such applications should be analyzed carefully to make sure that the requirements are met properly. We analyzed and compared the performance of the SAS under di erent network topologies. By observing the characteristics of the existing architectures, we came up with new architectures that perform better. We have suggested several modi cations to existing solutions that allow significant improvement in the performance of the existing solutions.

Kembanur Natarajan, Elangovan

2011-05-01T23:59:59.000Z

58

Preliminary gas turbine combustor design using a network approach  

SciTech Connect

The preliminary design process of a gas turbine combustor often involves the use of cumbersome, geometry restrictive semi-empirical models. The objective of this analysis is the development of a versatile design tool for gas turbine combustors, able to model all conceivable combustor types. A network approach is developed that divides the flow into a number of independent semi-empirical subflows. A pressure-correction methodology solves the continuity equation and a pressure-drop/flow rate relationship. The development of a full conjugate heat transfer model allows the calculation of flame tube heat loss in the presence of cooling films, annulus heat addition, and flame tube feature heat pick-up. A constrained equilibrium calculation, incorporating mixing and recirculation models, simulates combustion processes. Comparison of airflow results to a well-validated combustor design code showed close agreement. The versatility of the network solver is illustrated with comparisons to experimental data from a reverse flow combustor.

Stuttaford, P.J.; Rubini, P.A. [Cranfield Univ. (United Kingdom). School of Mechanical Engineering

1997-07-01T23:59:59.000Z

59

Lighting networks: A new approach for designing lighting algorithms  

E-Print Network (OSTI)

In the past, new global illumination algorithms have usually been designed as a single module that was responsible for the simulation of all aspects of illumination in a scene. A recently developed alternative is the design of small and specialized algorithms (lighting operators) together with an infrastructure for creating more complex algorithms by connecting these building blocks--the Lighting Network. In this paper, we discuss the benefits of the Lighting Network approach for designing new and improved global illumination algorithms. Lighting Networks not only provide a flexible infrastructure for new algorithms, they also support a better theoretic understanding of the lighting simulation process. We show that a small number of global light propagation operators already provides the basis for creating many of todays illumination algorithms. Their illumination results are converted into more suitable representations by purely local conversion operators that are specific to an illumination algorithm. Varying the composition of these operators and introducing new elements allows us to create and explore the benefits of new simulation algorithms. We demonstrate the potential of Lighting Networks with several examples, implementing a diverse set of algorithms, such as density estimation, irradiance gradients, and a composite lighting simulation.

Philipp Slusallek; Marc Stamminger; Hans-Peter Seidel

1998-01-01T23:59:59.000Z

60

A Comparison of Electricity Market Designs in Networks  

E-Print Network (OSTI)

according to a well defined protocol. Such a design, as implemented for example in New England and PJM (Pennsylvania, New Jersey Mary- land and neighbouring states), ensures that different locational markets are automatically arbitraged and the network... includes marginal loss calculations. Furthermore, they have like PJM a multi-settlement system with integrated day-ahead and balancing market. The possibility to implement these additional features in a consistent way can be seen as an additional benefit...

Ehrenmann, A; Neuhoff, Karsten

2004-06-16T23:59:59.000Z

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

A Hybrid Simulated Annealing and Simplex Method for Fixed-Cost Capacitated Multicommodity Network Design  

Science Conference Proceedings (OSTI)

The fixed-cost Capacitated Multicommodity Network Design (CMND) problem is a well known NP-hard problem. This paper presents a matheuristic algorithm combining Simulated Annealing (SA) metaheuristic and Simplex method for CMND problem. In the proposed ... Keywords: Matheuristic, Metaheuristic, Multicommodity Capacitated Network Design Problem, Network Design Problem, Simulated Annealing

Masoud Yaghini; Mohammad Karimi; Mohadeseh Rahbar; Rahim Akhavan

2011-10-01T23:59:59.000Z

62

Boundary-induced orientation of dynamic filament networks and vesicle agglomerations  

E-Print Network (OSTI)

We find a statistical mechanism that can adjust orientations of intracellular filaments to cell geometry in absence of organizing centers. The effect is based on random and isotropic filament (de-)polymerization dynamics and is independent of filament interactions and explicit regulation. It can be understood by an analogy to electrostatics and appears to be induced by the confining boundaries; for periodic boundary conditions no orientational bias emerges. Including active transport of particles, the model reproduces experimental observations of vesicle accumulations in transected axons.

Philip Greulich; Ludger Santen

2011-06-28T23:59:59.000Z

63

NETL: Gasification Systems - Model Based Optimal Sensor Network Design for  

NLE Websites -- All DOE Office Websites (Extended Search)

Model Based Optimal Sensor Network Design for Condition Monitoring Model Based Optimal Sensor Network Design for Condition Monitoring Project Number: FE0005712 General Electric (GE) Global Research is developing an advanced model-based optimal sensor network to monitor the condition of the gasification section in an integrated gasification combined cycle (IGCC) plant. The work builds on model-based controls aimed at enhancing efficiency and operational flexibility through increased automation. Within an overall strategy of employing model-based online monitoring and predictive controls, GE Global Research is extending existing models for the gasifier and radiant syngas cooler to include the effects of degradation and fouling on the sensed variables like temperature etc., and will implement an estimation algorithm to assess the extent of gasifier refractory degradation and radiant syngas cooler fouling. An optimization-based solution will be employed to optimally place the hardware sensors utilized in the estimation algorithm in order to achieve the monitoring requirements at the lowest cost. The performance of the sensor placement algorithm and resulting monitoring solution will be demonstrated through simulations using representative test cases. The overall approach is one of the first to be applicable to condition monitoring of critical components in IGCC plants.

64

Heat Exchanger Network Targeting, Design and Analysis: The MIDAS Package  

E-Print Network (OSTI)

Recent work to consolidate pinch-based procedures for targeting, design and analysis of heat exchanger networks (HENs) has focused on the production of powerful, user-friendly software. Advanced optimization techniques, such as mixed integer non-linear programming, have been added to established pinch procedures to increase the power of these techniques, enabling users to generate optimized HENs in an interactive computational environment. Additional procedures for improved HEN area targeting and retrofit network modifications have also been developed. Within ICI these developments (along with several others) have been incorporated in the MIDAS software package. This paper outlines some of the technical developments that have taken place to make this possible and illustrates some of the capabilities of the new software.

Barton, I.; Jones, D. H.; Smith, G. J.

1987-09-01T23:59:59.000Z

65

Design and implementation of P2P multimedia system on Taiwan Advance Research and Education Network  

Science Conference Proceedings (OSTI)

This study designs and implements a cross-platform, cross-domain P2P multimedia sharing system in the Taiwan Advance Research and Education Network. The system allows users to easily access the multimedia resources of the entire network from any network ... Keywords: OSGi, P2P network, multimedia system

Sung-Yen Chang; Chin-Feng Lai; Yueh-Min Huang; Te-Lung Liu; Jen-Wei Hu; Chia-Cheng Hu

2010-06-01T23:59:59.000Z

66

On the wireless local area network design problem with performance guarantees  

Science Conference Proceedings (OSTI)

In this paper, we propose a model for the wireless local area network (WLAN) design problem with performance guarantees. This problem consists of selecting the location of the access points (APs) as well as the power and the channel of each AP. The performance ... Keywords: Mathematical model, Network design and planning, Tabu search, Wireless local area network (WLAN)

Abderraouf Bahri; Steven Chamberland

2005-08-01T23:59:59.000Z

67

School of Architecture, Design and the Built Environment Delta T optimisation of district heating network  

E-Print Network (OSTI)

School of Architecture, Design and the Built Environment Delta T optimisation of district heating of any network. Most existing district heating systems work at small (10-15 C) delta T. Although for the conventional and optimised design of the district heating network. The network operation will be simulated

Evans, Paul

68

A memetic algorithm for optimal dynamic design of wireless sensor networks  

Science Conference Proceedings (OSTI)

We present a memetic algorithm that dynamically optimizes the design of a wireless sensor network towards energy conservation and extension of the life span of the network, taking into consideration application-specific requirements, communication constraints ... Keywords: Design optimization, Energy conservation, Memetic algorithms, Wireless sensor networks

Konstantinos P. Ferentinos; Theodore A. Tsiligiridis

2010-02-01T23:59:59.000Z

69

Automated Recurrent Neural Network Design of a Neural Controller in a Custom Power Device  

Science Conference Proceedings (OSTI)

A general purpose implementation of the Tabu Search metaheuristic, called Universal Tabu Search, is used to optimally design a Locally Recurrent Neural Network architecture. Indeed, the design of a neural network is a tedious and time consuming trial ... Keywords: custom power protection device, neural controller, recurrent neural networks, universal Tabu Search

B. Cannas; G. Celli; A. Fanni; F. Pilo

2001-05-01T23:59:59.000Z

70

A case study in meta-simulation design and performance analysis for large-scale networks  

Science Conference Proceedings (OSTI)

Simulation and emulation techniques are fundamental to aid the process of large-scale protocol design and network operations. However, the results from these techniques are often view with a great deal of skepticism from the networking community. Criticisms ...

David Bauer; Garrett Yaun; Christopher D. Carothers; Murat Yuksel; Shivkumar Kalyanaraman

2004-12-01T23:59:59.000Z

71

Energy-aware network coding circuit and system design  

E-Print Network (OSTI)

Network Coding (NC) has been shown to provide several advantages in communication networks in terms of throughput, data robustness and security. However, its applicability to networks with resource constrained nodes, like ...

Angelopoulos, Georgios, S.M. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

72

A Benders decomposition approach for a distribution network design problem with consolidation and capacity considerations  

Science Conference Proceedings (OSTI)

We develop a model for a strategic freight-forwarding network design problem in which the design decisions involve the locations and capacities of consolidation and deconsolidation centers, and capacities on linehaul linkages as well as the shipment ... Keywords: Benders decomposition, Consolidation, Network design

Halit íSter; Homarjun Agrahari

2011-03-01T23:59:59.000Z

73

PASES: An energy-aware design space exploration framework for wireless sensor networks  

Science Conference Proceedings (OSTI)

Energy consumption is one of the most constraining requirements for the development and implementation of wireless sensor networks. Many design aspects affect energy consumption, ranging from the hardware components, operations of the sensors, the communication ... Keywords: Design space exploration, Embedded systems, Energy aware, Platform based design, Wireless sensor networks

Ivan Minakov, Roberto Passerone

2013-09-01T23:59:59.000Z

74

Guidance for the network design and optimum site exposure for PM2.5 and PM10  

Science Conference Proceedings (OSTI)

This guidance provides a method and rationale for designing monitoring networks to determine compliance with newly enacted PM 2.5 and PM 10 national ambient air quality standards. It defines concepts and terms of network design, presents a methodology for defining planning areas and community monitoring zones, identifies data resources and the uses of those resources for network design, and provides some practical examples of applying the guidance. Existing metropolitan statistical areas are first examined to determine where the majority of the people live in each state. These are then broken down into smaller populated entities which may include country, zip code, census tract, or census block boundaries. Combinations of these population entities are combined to define metropolitan planning areas. These may be further sub-divided into community monitoring zones, based on examination of existing PM measurements, source locations, terrain, and meteorology. Finally, PM 2.5 monitors are located at specific sites that represent neighborhood or urban scales to determine compliance with the annual standard and at maximum, population oriented locations for comparison with the 24-hour standard.

Watson, J.G.; Chow, J.C.; DuBois, D.; Green, M.; Frank, N.

1997-12-15T23:59:59.000Z

75

Cross-Layer Design for Relay Selection and Power Allocation Strategies in Cooperative Networks  

Science Conference Proceedings (OSTI)

In mobile relay networks, relay nodes in mobility generally have variable channel conditions and limited residual energy, which may affect the network performance. In this paper, we proposed a cross-layer design jointly incorporating best relay selection ... Keywords: Cooperative diversity, cross-layer, relay selection, power allocation, network lifetime

Qiu Lin; Zhang Yong; Dai Chao; Song Mei; Wang Danzhi

2009-05-01T23:59:59.000Z

76

Aqua-Net: An Underwater Sensor Network Architecture --Design and Implementation  

E-Print Network (OSTI)

Aqua-Net: An Underwater Sensor Network Architecture -- Design and Implementation Zheng Peng, Zhong Department, University of Connecticut, Storrs, CT 06269 Abstract Underwater sensor network (UWSN) has emerged architecture for underwater sensor network. This paper proposes AQUA-NET, an architecture for underwater sensor

Cui, Jun-Hong

77

A wireless sensor network design tool to support building energy management  

Science Conference Proceedings (OSTI)

The physical location of sensor nodes strongly influences the performance of the network from the perspective of accurate data sensing and reliable communication. Therefore deployment planning can be regarded as an essential stepping stone to producing ... Keywords: building management system, heterogeneous wireless network infrastructure, industry foundation classes, wireless sensor network design

Antony Guinard; Alan McGibney; Dirk Pesch

2009-11-01T23:59:59.000Z

78

Time-domain approach to energy efficiency in high-performance network element design  

E-Print Network (OSTI)

Energy efficiency is a corner stone of sustainability in data center and high-performance networking. However, at present there is a notable structural mismatch between network silicon development targets and network equipment utilization patterns in the field. In particular, some aspects of network energy utilization (eg load-proportional energy consumption) routinely stay out of focus during system design and implementation. Drawing from hands-on research and development in high-speed and grid networking, we identify a novel approach to energy efficiency in network engineering. In this paper, we demonstrate how the problem of efficient network system design can be dissected into smaller sections based on timescales of traffic processing. The newly proposed approach allows R&D efforts to be tightly paired to resources and sustainability targets to improve energy efficiency in many classes of network and telecom devices.

Kharitonov, Daniel

2009-01-01T23:59:59.000Z

79

Application and performance analysis of neural networks for decision support in conceptual design  

Science Conference Proceedings (OSTI)

This paper analyzes the use of feedforward multilayer perceptron neural networks in the support of the decision process during the conceptual design phase of engineering systems. A user friendly software tool is proposed in order to increase the quality ... Keywords: Conceptual design, Decision support, Neural networks

Ivo M. L. Ferreira; Paulo J. S. Gil

2012-07-01T23:59:59.000Z

80

A Global Optimization Approach to a Water Distribution Network DesignProblem  

Science Conference Proceedings (OSTI)

In this paper, we address a global optimization approach to a water distribution network design problem. Traditionally, a variety of local optimization schemes have been developed for such problems, each new method discovering improved solutions for ... Keywords: Water distribution systems, network design, reformulation-linearization technique (RLT)

Hanif D. Sherali; Ernest P. Smith

1997-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Seal inlet disturbance boundary conditions for rotordynamic models and influence of some off-design conditions on labyrinth rotordynamic instability  

E-Print Network (OSTI)

Systematic parametric studies were performed to better understand seal-inlet rotordynamics. A CFD-perturbation model was employed to compute the seal-inlet flow disturbance quantities. Seal inlet disturbance boundary condition correlations were proposed from the computed seal-inlet quantities using the important parameters. It was found that the cosine component of the seal-inlet swirl velocity disturbance W1C has a substantial impact on the cross-coupled stiffness, and that the correlations for W1C and W1S should be used to replace the historical guess that seal inlet W1C = 0 and W1S = 0. Also, an extremely precise relationship was found between the swirl disturbance W1C and the seal-inlet swirl velocity (Ï�Rsh â�� �¯W0). Thus, the number of experiments or computer runs needed to determine the effect of spin speed, shaft radius and/or inlet swirl velocity on the cross-coupled stiffness is greatly reduced by plotting the simplified relationship of the cross-coupled stiffness against the swirl slip velocity. The benefits of using the new seal-inlet boundary condition correlations were assessed by implementing them into a CFD-perturbation model. Consistently improved agreement with measurements was obtained for both liquid annular seals and gas labyrinth seals. Further, the well-established CFD-perturbation model with new boundary condition correlations was employed to investigate the rotordynamics of two off-design situations. The first case considered the influence of labyrinth seal teeth damage on the performance and the rotordynamic characteristics of impeller eye seals in centrifugal compressors. The second case considered the influence of rotor-axial-shifting on rotordynamic forces for high-low labyrinth seals in steam turbines during the start-up and shut-down process. The results should provide useful information for labyrinth seal design and fault diagnosis of stability problems in turbines and compressors.

Xi, Jinxiang

2005-12-01T23:59:59.000Z

82

Design of a particulate-monitoring network for the Y-12 plant  

SciTech Connect

An Air Quality Monitoring Network Design (AQMND) with multiple objectives is being developed for the Y-12 Plant production facilities. The objectives are: Y-12 facility surveillance; monitoring the transport of Y-12 generated airborne effluents towards either the Oak Ridge National Laboratory or the developed region of the City of Oak Ridge; and monitoring population exposure in residential areas close to the Y-12 Plant. A two step design process was carried out, using the Air Quality Monitor Network Design Model (AQMND) previously used for the Oak Ridge National Laboratory network. In the first step of the design we used existing air quality monitor locations, subjectively designated locations, and grid intersections as a set of potential monitor sites. The priority sites from the first step (modified to account for terrain and accessibility), and subjectively designated sites, were used as the potential monitor sites for the second step of the process which produced the final design recommendations for the monitor network.

Hougland, E.S.; Oakes, T.W.; Underwood, J.N.

1982-01-01T23:59:59.000Z

83

The Development of a Scanning Raman Water Vapor Lidar for Boundary Layer and Tropospheric Observations  

Science Conference Proceedings (OSTI)

A scanning, ultraviolet, Raman water vapor lidar designed primarily for boundary layer measurements has been built and operated by the Los Alamos National Laboratory Ground-Based Earth Observing Network team. The system provides high temporal and ...

W. E. Eichinger; D. I. Cooper; P. R. Forman; J. Griegos; M. A. Osborn; D. Richter; L. L. Tellier; R. Thornton

1999-11-01T23:59:59.000Z

84

Intelligent Experimental Design Using an Artificial Neural Network Meta Model and Information Theory  

Science Conference Proceedings (OSTI)

Ability to rapidly design products and their manufacturing process is a key to being competitive in a dynamic market environment. Traditional methods of design of experiment development are unsatisfactory when applied to design problems with large number ... Keywords: Artificial Neural Network, Experimental Design, Information Theory

Shi-Shang Jang; David Shan-Hill Wong; Junghui Chen

2006-05-01T23:59:59.000Z

85

Towards standards in user interface design of networked devices.  

E-Print Network (OSTI)

??Networked appliances have long held promise of making people's lives easier by allowing users complete access over their functionality through an intermediate device such as… (more)

Selimovic, Sanel

2010-01-01T23:59:59.000Z

86

Multiscale Modeling of Grain Boundary Segregation and Embrittlement in Tungsten for Mechanistic Design of Alloys for Coal Fired Plants  

NLE Websites -- All DOE Office Websites (Extended Search)

Fairbanks, AK * Morgantown, WV * Pittsburgh, PA * Sugar Land, TX Fairbanks, AK * Morgantown, WV * Pittsburgh, PA * Sugar Land, TX Website: www.netl.doe.gov Customer Service: 1-800-553-7681 Multiscale Modeling of Grain Boundary Segregation and Embrittlement in Tungsten for Mechanistic Design of Alloys for Coal Fired Plants Background The Department of Energy (DOE) National Energy Technology Laboratory (NETL) University Coal Research (UCR) Program seeks to further develop the understanding of coal utilization. Since the program's inception in 1979, its primary objectives have been to improve our understanding of the chemical and physical processes involved in the conversion and utilization of coal in an environmentally acceptable manner; maintain and upgrade the coal research capabilities and facilities of U.S. colleges and

87

Reliability by design in distributed power transmission networks  

Science Conference Proceedings (OSTI)

The system operator of a large power transmission network must ensure that power is delivered whenever there is demand in order to maintain highly reliable electric service. To fulfill this mandate, the system operator must procure reserve capacity to ... Keywords: Inventory theory, Networks, Optimization, Power transmission

Mike Chen; In-Koo Cho; Sean P. Meyn

2006-08-01T23:59:59.000Z

88

Design of a backup network for catastrophe scenarios  

Science Conference Proceedings (OSTI)

Communication networks play a fundamental role in the response to a massive catastrophe, like an earthquake or a large-scale terrorist attack to a major urban area. In such situations, command centres must be able to rely on a fully operational communication ... Keywords: backup networks, emergency communications, resilience

S. Alves; B. Koldehofe; H. Miranda; F. Taiani

2009-06-01T23:59:59.000Z

89

Energy supply network design optimization for distributed energy systems  

Science Conference Proceedings (OSTI)

Based on the fluctuations in power and heat demand of the consumers in a region, this paper presents a bi-level programming model for the regional DES (distributed energy system) network planning. The model aims to minimize the total cost of the regional ... Keywords: Bi-level programming, Distributed energy system, Energy supply network, Hybrid algorithm

Ming Dong; Fenglan He; Hairui Wei

2012-11-01T23:59:59.000Z

90

Network protection design models, a heuristic, and a study for concurrent single-link per layer failures in three-layer networks  

Science Conference Proceedings (OSTI)

Multilayer network design has received significant attention in current literature. However, the explicit modeling of IP/MPLS over OTN over DWDM in which the OTN layer's technological constraints are specifically considered has not been investigated ... Keywords: Multilayer network, Network optimization, Survivable design

Iyad Katib; Deep Medhi

2013-03-01T23:59:59.000Z

91

Houston LDAR II network: design, operation, and performance analysis  

E-Print Network (OSTI)

The Houston LDAR II network is an array of twelve VHF time-of-arrival (TOA) sensors operated by Texas A&M University. The goals of the network are to conduct indepth studies of thunderstorm electrification and provide timely lightning threats to the Houston area. Before analyses are conducted using data from the Houston LDAR network, it is necessary to understand the LDAR networkâ s performance and limitations, such as the LDAR source detection efficiency, network range, and location accuracy. Initial results from the 31 October 2005 Mesoscale Convective System (MCS) timing error analysis revealed an RMS timing error for the Houston LDAR network of 90 ns for 6 sensor solutions. This gives a three-dimensional location accuracy of 1 km at a distance of 150 km and 100 m over the center of the network. Reanalysis with updated sensor positions decreased the RMS timing error to 75 ns. This decrease in RMS timing error increased the median three-dimensional location accuracy by ~100 m at a 100 km range. The network has been operated at both 70 MHz and 40 MHz. Model results of detection efficiency suggest that the change to 40 MHz yields an increase of 9 - 10 dB in network sensitivity. Analysis of VHF source power distributions shows a similar shift from that expected from the model. These results show that the 40 MHz LDAR network detects ~3.3 times more VHF sources than the 70 MHz network. The analysis of the usable network range for research purposes is currently set by rough guidelines of location accuracy and detection efficiency. For location accuracy, a 1 km limit allows storm analysis out to a range of more than 150 km. For the detection efficiency analysis, results based on source power distributions suggest a gradual fall off with range. Examining the change in VHF source density by range reveals different results. VHF source density remained fairly constant out to a range of 100 km at which point a significant fall off was observed. Based on these results the usable network range for the Houston network is 100 km.

Ely, Brandon Lee

2008-08-01T23:59:59.000Z

92

BROADBAND ANTENNA MATCHING NETWORK DESIGN AND APPLICATION FOR RF PLASMA ION SOURCE  

SciTech Connect

The RF ion source at Spallation Neutron Source has been upgraded to meet higher beam power requirement. One important subsystem for efficient operation of the ion source is the 2MHz RF impedance matching network. The real part of the antenna impedance is very small and is affected by plasma density for 2MHz operating frequency. Previous impedance matching network for the antenna has limited tuning capability to cover this potential variation of the antenna impedance since it employed a single tuning element and an impedance transformer. A new matching network with two tunable capacitors has been built and tested. This network can allow precision matching and increase the tunable range without using a transformer. A 5-element broadband matching network also has been designed, built and tested. The 5-element network allows wide band matching up to 50 kHz bandwidth from the resonance center of 2 MHz. The design procedure, simulation and test results are presented.

Shin, Ki [ORNL; Kang, Yoon W [ORNL; Piller, Chip [ORNL; Fathy, Aly [University of Tennessee, Knoxville (UTK)

2011-01-01T23:59:59.000Z

93

Design and Analysis of Micro-Solar Power Systems for Wireless Sensor Networks  

E-Print Network (OSTI)

Design and Analysis of Micro-Solar Power Systems for Wireless Sensor Networks Jaein Jeong, Xiaofan and the power they obtain from their environment. Several micro-solar powered designs have been developed prominent designs of micro-solar power systems (Heliomote and Trio), and interpret the results to propose

Culler, David E.

94

Design of large-scale agricultural wireless sensor networks: email from the vineyard  

Science Conference Proceedings (OSTI)

We describe the design and implementation of a large-scale Wireless Sensor Network (WSN) for agriculture monitoring. As a part of validation we have deployed a prototype of 64 sensors to monitor a commercial vineyard. The system provides ... Keywords: WSN testbed, agricultural WSNs, agriculture monitoring, commercial vineyards, data collection, data storage, geographical coverage, large-scale WSNs, spatial resolution, vineyeard monitoring, wireless networks, wireless sensor networks

Christine Jardak; Krisakorn Rerkrai; Aleksandar Kovacevic; Janne Riihijarvi; Petri Mahonen

2010-08-01T23:59:59.000Z

95

Automatic design of artificial neural networks and associative memories for pattern classification and pattern restoration  

Science Conference Proceedings (OSTI)

In this note we present our most recent advances in the automatic design of artificial neural networks (ANNs) and associative memories (AMs) for pattern classification and pattern recall. Particle Swarm Optimization (PSO), Differential Evolution (DE), ... Keywords: artificial neural networks, associative memories, evolutionary programming

Humberto Sossa; Beatriz A. Garro; Juan Villegas; Carlos Avilés; Gustavo Olague

2012-06-01T23:59:59.000Z

96

Design and Implementation of a Multi-purpose Cluster System Network Interface Unit  

E-Print Network (OSTI)

Design and Implementation of a Multi-purpose Cluster System Network Interface Unit by Boon Seong of a Multi-purpose Cluster System Network Interface Unit by Boon Seong Ang Submitted to the Department. These shortcomings unnecessarily constrain the performance of cluster systems. Our thesis is that a cluster system

97

Designing scalable networks with multiple personalities Department of Mathematics and Computer Science,  

E-Print Network (OSTI)

Designing scalable networks with multiple personalities Bilal Khan Department of Mathematics with its own merits vis-a-vis performance metrics. Specifically, in this paper we focus on physical (G) = lZ+ Pl (G). An overlay network is a set of walks Q P (G), which together implement a (multi

Khan, Bilal

98

Evaluation of body sensor network platforms: a design space and benchmarking analysis  

Science Conference Proceedings (OSTI)

Body Sensor Networks (BSNs) consist of sensor nodes deployed on the human body for health monitoring. Each sensor node is implemented by interfacing a physiological sensor with a sensor platform consisting of components such as microcontroller, radio ... Keywords: benchmark, body sensor networks, design space, hardware systems, system performance, wearable BSNs

Sidharth Nabar; Ayan Banerjee; Sandeep K. S. Gupta; Radha Poovendran

2010-10-01T23:59:59.000Z

99

Technology independent circuit sizing for standard cell based design using neural networks  

Science Conference Proceedings (OSTI)

This paper presents a neural network (NN) approach for modeling the time characteristics of fundamental gates of digital integrated circuits that include inverter, NAND, NOR, and XOR gates. The modeling approach presented here is technology independent, ... Keywords: Computer aided design, Digital integrated circuits, Neural networks

Nihan Kahraman; Tulay Yildirim

2009-07-01T23:59:59.000Z

100

NGNP Nuclear-Industrial Facility and Design Certification Boundaries White Paper  

SciTech Connect

The Next Generation Nuclear Plant (NGNP) Project was initiated at Idaho National Laboratory by the U.S. Department of Energy pursuant to the 2005 Energy Policy Act and based on research and development activities supported by the Generation IV Nuclear Energy Systems Initiative. The principal objective of the NGNP Project is to support commercialization of the high temperature gas-cooled reactor (HTGR) technology. The HTGR is helium cooled and graphite moderated and can operate at reactor outlet temperatures much higher than those of conventional light water reactor (LWR) technologies. Accordingly, it can be applied in many industrial applications as a substitute for burning fossil fuels, such as natural gas, in addition to producing electricity, which is the principal application of current LWRs. These varied industrial applications may involve a standard HTGR modular design using different Energy Conversion Systems. Additionally, some of these process heat applications will require process heat delivery systems to lie partially outside the HTGR operator’s facility.

Thomas E. Hicks

2011-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Autonomous Depth Adjustment for Underwater Sensor Networks: Design and Applications  

E-Print Network (OSTI)

To fully understand the ocean environment requires sensing the full water column. Utilizing a depth adjustment system on an underwater sensor network provides this while also improving global sensing and communications. ...

Detweiler, Carrick

102

Optimum Sampling Designs for a Glider–Mooring Observing Network  

Science Conference Proceedings (OSTI)

Ocean observing systems (OOSs) constituted by moorings and gliders are becoming relevant in oceanographic and climate studies. In these observing networks, the temporal variability is captured by mooring observations, while the spatial variability ...

A. Alvarez; B. Mourre

2012-04-01T23:59:59.000Z

103

Design and analysis of optical flow switched networks  

E-Print Network (OSTI)

In the four decades since optical fiber was introduced as a communications medium, optical networking has revolutionized the telecommunications landscape. It has enabled the Internet as we know it today, and is central to ...

Weichenberg, Guy E. (Guy Elli), 1978-

2009-01-01T23:59:59.000Z

104

Theoretical Assessment of Uncertainty in Regional Averages due to Network Density and Design  

Science Conference Proceedings (OSTI)

Weather Research and Forecasting (WRF) model simulations are performed over Russia for July and December 2005, 2006, and 2007 to create a “dataset” to assess the impact of network density and design on regional averages. Based on the values at ...

Debasish PaiMazumder; Nicole Mölders

2009-08-01T23:59:59.000Z

105

Design and simulation of a mobile ad-hoc network in HLA environment  

Science Conference Proceedings (OSTI)

This paper presents a generalized design for MANET simulations to support any kind of widespread adoption, and standardized to allow universal interoperability, along with flexibility to permit runtime extension of its ontology. Traditional network simulation ... Keywords: HLA, MANET, OMT, RTI

Abdul Basit; Shoib A. Khan

2007-05-01T23:59:59.000Z

106

Designing Energy-Efficient Low-Diameter On-chip Networks with Equalized Interconnects  

E-Print Network (OSTI)

In a power and area constrained multicore system, the on-chip communication network needs to be carefully designed to maximize the system performance and programmer productivity while minimizing energy and area. In this ...

Joshi, Ajay J.

107

Design of artificial neural networks for distribution feeder loss analysis  

Science Conference Proceedings (OSTI)

To enhance the efficiency for power loss analysis of voluminous distribution feeders, ANN-based simplified power loss models with the Levenberg-Marquardt (LM) algorithm have been developed for overhead feeders and underground feeders, respectively. The ... Keywords: Artificial neural network, Customer information system, Levenberg-Marquardt algorithm, Outage management system

Tsung-En Lee; Chin-Ying Ho; Chia-Hung Lin; Meei-Song Kang

2011-11-01T23:59:59.000Z

108

A Majorization-Minimization Approach to Design of Power Transmission Networks  

E-Print Network (OSTI)

We propose an optimization approach to design cost-effective electrical power transmission networks. That is, we aim to select both the network structure and the line conductances (line sizes) so as to optimize the trade-off between network efficiency (low power dissipation within the transmission network) and the cost to build the network. We begin with a convex optimization method based on the paper "Minimizing Effective Resistance of a Graph" [Ghosh, Boyd & Saberi]. We show that this (DC) resistive network method can be adapted to the context of AC power flow. However, that does not address the combinatorial aspect of selecting network structure. We approach this problem as selecting a subgraph within an over-complete network, posed as minimizing the (convex) network power dissipation plus a non-convex cost on line conductances that encourages sparse networks where many line conductances are set to zero. We develop a heuristic approach to solve this non-convex optimization problem using: (1) a continua...

Johnson, Jason K

2010-01-01T23:59:59.000Z

109

Design, implementation, and evaluation of EnviroMic: A storage-centric audio sensor network  

Science Conference Proceedings (OSTI)

This article presents the design, implementation, and evaluation of EnviroMic, a low-cost experimental prototype of a novel distributed acoustic monitoring, storage, and trace retrieval system designed for disconnected operation. Our intended ... Keywords: Sensor networks, acoustics, applications, distributed storage, group management

Liqian Luo; Qing Cao; Chengdu Huang; Lili Wang; Tarek F. Abdelzaher; John A. Stankovic; Michael Ward

2009-05-01T23:59:59.000Z

110

From Waste to Hydrogen: An Optimal Design of Energy Production and Distribution Network  

E-Print Network (OSTI)

1 From Waste to Hydrogen: An Optimal Design of Energy Production and Distribution Network Nathan and distribution systems for hydrogen production from agricultural residues, which is a representative green energy of producing clean energy from renewable resources. This paper focuses on the optimal design of the production

Fan, Yueyue

111

Synthesis and design of optimal thermal membrane distillation networks  

E-Print Network (OSTI)

Thermal membrane distillation is one of the novel separation methods in the process industry. It involves the simultaneous heat and mass transfer through a hydrophobic semipermeable membrane through the use of thermal energy to bring about the separation of a feed mixture into two streams- a permeate and a retentate stream. Traditionally, studies on this technology have focused on the performance of individual modules as a function of material of the membrane and also configuration of the membrane. However, an investigation into the performance of a network of these modules has not been conducted in the past. A hierarchical parametric programming technique for synthesis of an optimal network of these modules is presented. A global mass allocation representation involving sources and sinks was used to solve the problem and derive criteria for optimality in specific regions of the parametric space. Two case studies have been presented to illustrate the applicability of the presented methodology.

Nyapathi Seshu, Madhav

2005-08-01T23:59:59.000Z

112

Multiscale Modeling of Grain Boundary Segregation and Embrittlement in Tungsten for Mechanistic Design of Alloys for Coal Fired Plants  

SciTech Connect

Based on a recent discovery of premelting-like grain boundary segregation in refractory metals occurring at high temperatures and/or high alloying levels, this project investigated grain boundary segregation and embrittlement in tungsten (W) based alloys. Specifically, new interfacial thermodynamic models have been developed and quantified to predict high-temperature grain boundary segregation in the W-Ni binary alloy and W-Ni-Fe, W-Ni-Ti, W-Ni-Co, W-Ni-Cr, W-Ni-Zr and W-Ni-Nb ternary alloys. The thermodynamic modeling results have been experimentally validated for selected systems. Furthermore, multiscale modeling has been conducted at continuum, atomistic and quantum-mechanical levels to link grain boundary segregation with embrittlement. In summary, this 3-year project has successfully developed a theoretical framework in combination with a multiscale modeling strategy for predicting grain boundary segregation and embrittlement in W based alloys.

Luo, Jian; Tomar, Vikas; Zhou, Naixie; Lee, Hongsuk

2013-06-30T23:59:59.000Z

113

Networking vendor strategy and competition and their impact on enterprise network design and implementation  

E-Print Network (OSTI)

While a significant amount of literature exists that discuss platform strategies used by general IT vendors, less of it has to do with corporate networking technology vendors specifically. However, many of the same strategic ...

Fung, Ray

2006-01-01T23:59:59.000Z

114

Green optical network design : power optimization of wide area and metropolitan area networks  

E-Print Network (OSTI)

Advancements in technology are fueling huge growth in network traffic capacity. Demand for low cost, reliable, and high bitrate transmissions grows 40-110% internationally every year. To date, most research has focused on ...

Lin, Katherine Xiaoyan

2011-01-01T23:59:59.000Z

115

Stochastic approaches for solving Rapid Transit Network Design ...  

E-Print Network (OSTI)

the estimation of the future demand will have in the design of new rapid transit ... is based on the current mobility patterns for which a new infrastructure does not.

116

Design Considerations for a Network of Thermodynamic Profilers  

Science Conference Proceedings (OSTI)

A modular design for a ground-based thermodynamic profiler is presented, based on experience with a six-channel microwave radiometer that has provided temperature, pressure, and moisture measurements continuously, unattended, since 1981. Each ...

J. A. Schroeder; J. R. Jordan; M. T. Decker

1989-10-01T23:59:59.000Z

117

Models, Calculation and Optimization of Gas Networks, Equipment and Contracts for Design, Operation, Booking and Accounting  

E-Print Network (OSTI)

There are proposed models of contracts, technological equipment and gas networks and methods of their optimization. The flow in network undergoes restrictions of contracts and equipment to be operated. The values of sources and sinks are provided by contracts. The contract models represent (sub-) networks. The simplest contracts represent either nodes or edges. Equipment is modeled by edges. More sophisticated equipment is represented by sub-networks. Examples of such equipment are multi-poles and compressor stations with many entries and exits. The edges can be of different types corresponding to equipment and contracts. On such edges, there are given systems of equation and inequalities simulating the contracts and equipment. On this base, the methods proposed that allow: calculation and control of contract values for booking on future days and for accounting of sales and purchases; simulation and optimization of design and of operation of gas networks. These models and methods are realized in software syst...

Ostromuhov, Leonid A

2011-01-01T23:59:59.000Z

118

Design and initial deployment of the wireless local area networking infrastructure at Sandia National Laboratories.  

SciTech Connect

A major portion of the Wireless Networking Project at Sandia National Laboratories over the last few years has been to examine IEEE 802.11 wireless networking for possible use at Sandia and if practical, introduce this technology. This project team deployed 802.11a, b, and g Wireless Local Area Networking at Sandia. This report examines the basics of wireless networking and captures key results from project tests and experiments. It also records project members thoughts and designs on wireless LAN architecture and security issues. It documents some of the actions and milestones of this project, including pilot and production deployment of wireless networking equipment, and captures the team's rationale behind some of the decisions made. Finally, the report examines lessons learned, future directions, and conclusions.

Long, John P.; Hamill, Michael J.; Mitchell, M. G.; Miller, Marc M.; Witzke, Edward L.; Wiener, Dallas J

2006-11-01T23:59:59.000Z

119

Model-Based Optimal Sensor Network Design for Condition Monitoring in an IGCC Plant  

NLE Websites -- All DOE Office Websites (Extended Search)

Optimal Sensor Network Optimal Sensor Network Design for Condition Monitoring in an IGCC Plant Background The U.S. Department of Energy's National Energy Technology Laboratory (NETL) develops affordable and clean energy from coal and other fossil fuels to secure a sustainable energy economy. To further this mission, NETL funds research and development of advanced sensor and control technologies that can function under the extreme operating conditions often found in advanced power systems,

120

Energy efficient Traffic-Aware design of on-off Multi-Layer translucent optical networks  

Science Conference Proceedings (OSTI)

Efficiency in energy consumption is attracting greater and greater attention in recent years to the point that it is becoming one of the major constraints steering the evolution of our society. In addition to developing new low-consumption devices, one ... Keywords: Daily traffic variation, Energy efficiency, Multi-shelf IP-over-WDM network, Rack/shelf power consumption model, Traffic-Aware optical network design

Giuseppe Rizzelli; Annalisa Morea; Massimo Tornatore; Olivier Rival

2012-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Design and evaluation of a new MAC protocol for long-distance 802.11 mesh networks  

Science Conference Proceedings (OSTI)

802.11 has been used well beyond its original intended use of WLANs. Of particular interest to us in this paper is its use in long-distance mesh networks being designed/used for low-cost rural connectivity. We describe in detail a new MAC protocol, called ... Keywords: 802.11 mesh networks, MAC design, network topology design, signal-to-interference ratio

Bhaskaran Raman; Kameswari Chebrolu

2005-08-01T23:59:59.000Z

122

Resilient design of recharging station networks for electric transportation vehicles  

DOE Green Energy (OSTI)

As societies shift to 'greener' means of transportation using electricity-driven vehicles one critical challenge we face is the creation of a robust and resilient infrastructure of recharging stations. A particular issue here is the optimal location of service stations. In this work, we consider the placement of battery replacing service station in a city network for which the normal traffic flow is known. For such known traffic flow, the service stations are placed such that the expected performance is maximized without changing the traffic flow. This is done for different scenarios in which roads, road junctions and service stations can fail with a given probability. To account for such failure probabilities, the previously developed facility interception model is extended. Results show that service station failures have a minimal impact on the performance following robust placement while road and road junction failures have larger impacts which are not mitigated easily by robust placement.

Kris Villez; Akshya Gupta; Venkat Venkatasubramanian

2011-08-01T23:59:59.000Z

123

The Development of a Synthesis Approach for Optimal Design of Seawater Reverse Osmosis Desalination Networks  

E-Print Network (OSTI)

This work introduces a systematic seawater reverse osmosis (SWRO) membrane network synthesis approach, based on the coordinated use of process superstructure representations and global optimization. The approach makes use of superstructure formulations that are capable of extracting a globally optimal design as a performance target, by taking into consideration desired process conditions and constraints that are typically associated with reverse osmosis systems. Thermodynamic insights are employed to develop lean network representations so that any underperforming solutions can be eliminated a priori. This essentially results in considerable improvement of the overall search speed, compared to previously reported attempts. In addition, the approach enables the extraction of structurally different design alternatives. In doing so, distinct membrane network design classes were established by partitioning the search space, based on network size and connectivity. As a result, corresponding lean superstructures were then systematically generated, which capture all structural and operational variants within each design class. The overall purpose is thus to enable the extraction of multiple distinct optimal designs, through global optimization. This mainly helps provide design engineers with a better understanding of the design space and trade-offs between performance and complexity. The approach is illustrated by means of a numerical example, and the results obtained were compared to previously related work. As anticipated, the proposed approach consistently delivered the globally optimal solutions, as well as alternative efficient design candidates attributed to different design classes, with reduced CPU times. This work further capitalizes on the developed representation, by accounting for detailed water quality information, within the SWRO desalination network optimization problem. The superstructures were modified to incorporate models that capture the performance of common membrane elements, as predicted by commercially available simulator tools, e.g. ROSA (Dow) and IMSDesign (Hydranautics). These models allow tracing of individual components throughout the system. Design decisions that are supported by superstructure optimization include network size and connectivity, flow rates, pressures, and post treatment requirements. Moreover, a detailed economic assessment capturing all the significant capital and operating costs associated in SWRO processes, including intake, pre and post treatment has also been accounted for. These modifications were then illustrated using a case study involving four seawater qualities, with salinities ranging from 35 to 45 ppt. The results highlight the dependency of optimal designs on the feed water quality involved, as well as on specified permeate requirements.

Alnouri, Sabla

2012-08-01T23:59:59.000Z

124

Design considerations for a fiber optic communications network for power systems  

Science Conference Proceedings (OSTI)

The design of a fiber optic communication network for monitoring and control in power systems is discussed. It is shown that by appropriate choice of protocols, a fault-tolerant system can be built that operates in any arbitrary configuration. Since the network is based on fiber optics, it can be made fast enough for substation monitoring and control. In this application, a relatively small number of cables is required to implement a high reliability system. The network can also be used for distribution automation. In this application the network is required to reach all parts of the power system, and the fiber cable itself becomes a significant fraction of the cost of communications. However, since many applications can be supported at once, the cost per function can be reasonable.

Kirkham, H.; Johnston, A.R. [Jet Propulsion Lab., Pasadena, CA (United States); Allen, G.D. [American Electric Power Service Corp., Columbus, OH (United States)

1993-08-01T23:59:59.000Z

125

Large Amplitude Spatial and Temporal Gradients in Atmospheric Boundary Layer CO2 Mole Fractions Detected With a Tower-Based Network in the U.S. Upper Midwest  

Science Conference Proceedings (OSTI)

This study presents observations of atmospheric CO{sub 2} mole fraction from a nine-tower, regional network deployed during the North American Carbon Program's Mid-Continent Intensive during 2007-2009. Within this network in a largely agricultural area, mean atmospheric CO{sub 2} gradients were strongly correlated with both ground-based inventory data and estimates from satellite remote sensing. The average seasonal drawdown for corn-dominated sites (35 ppm) is significantly larger than has been observed at other continental boundary layer sites. Observed growing-season median CO{sub 2} gradients are strongly dependent on local flux. The gradients between cross-vegetation site-pairs, for example, average 2.0 ppm/100 km, four times larger than the similar-vegetation site-pair average. Daily-timescale gradients are as large as 5.5 ppm/100 km, but dominated by advection rather than local flux. Flooding in 2008 led to a region-wide 23 week delay in growing-season minima. The observations show that regional-scale CO{sub 2} mole fraction networks yield large, coherent signals governed largely by regional sources and sinks of CO{sub 2}.

Miles, Natasha; Richardson, S. J.; Davis, Kenneth J.; Lauvaux, Thomas; Andrews, A.; West, Tristram O.; Bandaru, Varaprasad; Crosson, Eric R.

2012-02-21T23:59:59.000Z

126

Design of Recycle/Reuse Networks with Thermal Effects and Variable Sources  

E-Print Network (OSTI)

Recycle/reuse networks are commonly used in industrial facilities to conserve natural resources, reduce environmental impact, and improve process economics. The design of these networks is a challenging task because of the numerous possibilities of assigning stream (process sources) to units that may potentially employ them (process sinks). Additionally, several fresh streams with different qualities and costs may be used to supplement the recycle of process streams. The selection of the type and flow of these fresh resources is an important step in the design of the recycle/reuse networks. This work introduces systematic approaches to address two new categories in the design of recycle/reuse networks: (a) The incorporation of thermal effects in the network. Two new aspects are introduced: heat of mixing of process sources and temperature constraints imposed on the feed to the process sinks iv (b) Dealing with variation in process sources. Two types of source variability are addressed: flowrate and composition For networks with thermal effects, an assignment optimization formulation is developed. Depending on the functional form of the heat of mixing, the formulation may be a linear or a nonlinear program. The solution of this program provides optimum flowrates of the fresh streams as well as the segregation, mixing, and allocation of the process sources to sinks. For networks with variable sources, a computer code is developed to solve the problem. It is based on discretizing the search space and using the concept of "floating pinch" to insure solution feasibility and optimal targets. Case studies are solved to illustrate the applicability of the new approaches.

Zavala Oseguera, Jose Guadalupe

2009-08-01T23:59:59.000Z

127

The Design and Evaluation of a Wireless Sensor Network for Mine Safety Monitoring  

E-Print Network (OSTI)

motes for several times in Dayan Coal Mine, Inner Mongolia province. As shown in Fig.3(a), sensor nodes mote experiment in Dayan Coal Mine (b) HHMSM prototype system deployed in a lab corridor (c) HHMSMThe Design and Evaluation of a Wireless Sensor Network for Mine Safety Monitoring Xiaoguang Niu12

Huang, Changcheng

128

Toward smart microgrid with renewable energy: an overview of network design, security, and standards  

Science Conference Proceedings (OSTI)

An increasing demand for efficient and safe electricity management has motivated the development of smart grid and accelerated the technical research for smart grid. On one side, a smart microgrid has been recently given an interest as a relatively small-scale, ... Keywords: distributed energy resources (DER), network design, renewable energy, security, smart microgrid, state of the art of research and standard trend

Mihui Kim

2013-06-01T23:59:59.000Z

129

A Network-Flow-Based Scheduler: Design, Performance History, and Experimental Analysis  

Science Conference Proceedings (OSTI)

We describe a program that schedules physician attending teams at Denver Health Medical Center. The program uses network flow techniques to prune an exponentially sized search space. We describe the program design, its performance history at the hospital, ... Keywords: graphs, matroids, scheduling

Harold Gabow; Tadayoshi Kohno

2001-12-01T23:59:59.000Z

130

The Design and Performance of SpaceWire Router-network using CSP  

E-Print Network (OSTI)

The Design and Performance of SpaceWire Router-network using CSP Session:Components Short Paper the point of view of robustness and security using CSP (Communication Sequential Processes) method, one Correspondong author:fukunaga@tmu.ac.jp 1 Occam has been originally developed by Inmos Limited inspired by CSP[3

Fukunaga, Chikara

131

Extended state estimator design method for neutral-type neural networks with time-varying delays  

Science Conference Proceedings (OSTI)

The problem of designing a state estimator having a global exponential convergence for a class of delayed neural networks of neutral-type is investigated in this paper. The time-delay pattern is a bounded differentiable time-varying function. The activation ...

Magdi Sadek Mahmoud

2012-03-01T23:59:59.000Z

132

Form design of product image using grey relational analysis and neural network models  

Science Conference Proceedings (OSTI)

This paper presents a new approach to determining the best design combination of product form elements for matching a given product image represented by a word pair. A grey relational analysis (GRA) model is used to examine the relationship between product ... Keywords: Kansei Engineering, grey prediction, grey relational analysis, neural networks, product form, product image

Hsin-Hsi Lai; Yang-Cheng Lin; Chung-Hsing Yeh

2005-10-01T23:59:59.000Z

133

Designing cyclic pressure pulsing in naturally fractured reservoirs using an inverse looking recurrent neural network  

Science Conference Proceedings (OSTI)

In this paper, an inverse looking approach is presented to efficiently design cyclic pressure pulsing (huff 'n' puff) with N"2 and CO"2, which is an effective improved oil recovery method in naturally fractured reservoirs. A numerical flow simulation ... Keywords: Big Andy Field, CO2, Cyclic pressure pulsing, Huff 'n' puff, N2, Recurrent neural networks

E. Artun; T. Ertekin; R. Watson; B. Miller

2012-01-01T23:59:59.000Z

134

Designing cost-efficient wireless sensor/actuator networks for building control systems  

Science Conference Proceedings (OSTI)

A modern Building Automation System (BAS) aims to enhance the functionality of interactive control strategies leading towards energy efficiency and enhanced user comfort. Typically, it is cheaper to embed the BAS within a Wireless Sensor/Actuator Network ... Keywords: MPC, building energy, co-design, sensor

Alie El-Din Mady; Gregory Provan; Ning Wei

2012-11-01T23:59:59.000Z

135

Energy Management Framework Designed for Autonomous Electric Vehicle with Sensor Networks Navigation  

Science Conference Proceedings (OSTI)

Cyber-physical systems (CPS) have emerged as a cutting edge technology for next-generation industrial applications, and are undergoing rapid development and inspiring numerous application domains. This article presents an innovative CPS application for ... Keywords: cyber-physical systems, wireless sensor networks, energy management, energy-efficient design, autonomous electric vehicle

Hui Suo, Jiafu Wan, Di Li, Caifeng Zou

2012-10-01T23:59:59.000Z

136

Designing productive spaces for mobile workers: Role insights from network analysis  

Science Conference Proceedings (OSTI)

Workspace design has not been keeping up with the evolving needs of mobile workers. Although the economic benefits of mobile work have been expanding for companies, few companies have mobile worker strategies that seriously address how new ways of working ... Keywords: Mobile workforce, knowledge management, mobile worker roles, physical work environments, value network analysis, workplace collaboration

Camille Venezia; Verna Allee; Oliver Schwabe

2008-04-01T23:59:59.000Z

137

Identifying the optimal set of parameters for new topic identification through experimental design  

Science Conference Proceedings (OSTI)

Users are interested in multiple topics during a search session, and identifying the boundaries of search sessions is an important task. This study proposes to use neural networks for defining the topic boundaries in search engine transaction logs, and ... Keywords: ANOVA, Experimental design, Neural network, Search engine, Session identification, Topic identification

Seda Ozmutlu

2010-12-01T23:59:59.000Z

138

An effective network processor design framework: using multi-objective evolutionary algorithms and object oriented techniques to optimise the intel IXP1200 network processor  

Science Conference Proceedings (OSTI)

In this paper we present a framework for design space exploration of a network processor, that incorporates parameterisation, power and cost analysis. This method utilises multi-objective evolutionary algorithms and object oriented analysis and design. ... Keywords: design space exploration, evolutionary approaches, object oriented

Liam Noonan; Colin Flanagan

2006-12-01T23:59:59.000Z

139

Design and fabrication of ring networks for high-speed communications between computers (multiprocessing systems)  

SciTech Connect

The results are presented of a design study of several possible implementations of a multinode pierce-type ring communications network. Using commercially available components, one ECL and two different TTL implementations were compared on the basis of performance (maximum system clock rate) and fabrication cost per node for a large ring. The ECL implementation was demonstrated to have a factor of nine better performance than the LS-TTL implementation, for a cost increase of only a few percent. A demonstration five-node ring network was then fabricated and tested; the performance results confirm the performance estimates. 16 references.

Gilbert, B.K.; Schwab, D.J.; Kinter, T.M.

1983-01-01T23:59:59.000Z

140

Lecture 19: Networks for Large Cache Design Interconnect Design Considerations for Large NUCA  

E-Print Network (OSTI)

regions #12;3 NUCA Delays Cache Controller R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R #12;4 Explorations for Optimality #12;5 Early and Aggressive Look-Up Cache Controller R MSB LSB types of links for address and data #12;6 Hybrid Network Cache Controller R R R R R R R R R R R R R R R

Balasubramonian, Rajeev

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Network  

NLE Websites -- All DOE Office Websites (Extended Search)

network - launched in November 2012. The network was built in collaboration with Internet2, an advanced network, which connects the nation's research universities. Leveraging...

142

? Capacity-based design [Preliminary for Part 2] 2. Energy Harvesting Networks Transmission Completion Time Minimization for single link  

E-Print Network (OSTI)

Transmission Completion Time Minimization for single link w / finite battery Extension to fading channels Transmission policies with inefficient energy storage IEEE ICC 2013, Budapest, Hungary 6/9/2013 Goals ? Energy Efficiency (EE): What it meant last decade; what it means today ? From a communication network design perspective what should we care about for energy efficient design of cellular/conventional wireless networks? (greenish) rechargeable/energy harvesting networks? (green) ? Communication with energy harvesting nodes Green, self-sufficient nodes with extended network lifetime Relatively new field with increasing interest IEEE ICC 2013, Budapest, Hungary 6/9/2013 Prerequisites for the Tutorial

Aylin Yener; Short Term; Throughput Maximization

2013-01-01T23:59:59.000Z

143

A majorization-minimization approach to design of power distribution networks  

Science Conference Proceedings (OSTI)

We consider optimization approaches to design cost-effective electrical networks for power distribution. This involves a trade-off between minimizing the power loss due to resistive heating of the lines and minimizing the construction cost (modeled by a linear cost in the number of lines plus a linear cost on the conductance of each line). We begin with a convex optimization method based on the paper 'Minimizing Effective Resistance of a Graph' [Ghosh, Boyd & Saberi]. However, this does not address the Alternating Current (AC) realm and the combinatorial aspect of adding/removing lines of the network. Hence, we consider a non-convex continuation method that imposes a concave cost of the conductance of each line thereby favoring sparser solutions. By varying a parameter of this penalty we extrapolate from the convex problem (with non-sparse solutions) to the combinatorial problem (with sparse solutions). This is used as a heuristic to find good solutions (local minima) of the non-convex problem. To perform the necessary non-convex optimization steps, we use the majorization-minimization algorithm that performs a sequence of convex optimizations obtained by iteratively linearizing the concave part of the objective. A number of examples are presented which suggest that the overall method is a good heuristic for network design. We also consider how to obtain sparse networks that are still robust against failures of lines and/or generators.

Johnson, Jason K [Los Alamos National Laboratory; Chertkov, Michael [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

144

Design of traveling wave windows for the PEP-II RF coupling network  

SciTech Connect

The waveguide windows in the PEP-II RF coupling network have to withstand high power of 500 kW. Traveling wave windows have lower power dissipation than conventional self-matched windows, thus rendering the possibility of less stringent mechanical design. The traveling wave behavior is achieved by providing a reflecting iris on each side of the window, and depending on the configuration of the irises, traveling wave windows are characterized as inductive or capacitive types. A numerical design procedure using MAFIA has been developed for traveling wave windows. The relative advantages of inductive and capacitive windows are discussed. Furthermore, the issues of bandwidth and multipactoring are also addressed.

Kroll, N.M.; Ng, C.K.; Judkins, J.; Neubauer, M.

1995-05-01T23:59:59.000Z

145

DESIGN AND DEPLOYMENT OF A MOBILE SENSOR NETWORK FOR THE SURVEILLANCE OF NUCLEAR MATERIALS IN METROPOLITAN AREAS  

E-Print Network (OSTI)

surveillance of nuclear materials in major cities. Specifically, the network consists of a large numberDESIGN AND DEPLOYMENT OF A MOBILE SENSOR NETWORK FOR THE SURVEILLANCE OF NUCLEAR MATERIALS, Rutgers University Piscataway, NJ 08854 Piscataway, NJ 08854 Key Words: Nuclear Detection and Surveillance

146

Design and implementation of a sector-based airspace model for the MIT Extensible Air Network Simulation  

E-Print Network (OSTI)

The MIT Extensible Air Network Simulation (MEANS) is a tool that has been designed to assist airline schedulers and air traffic managers in predicting flight delays for given air traffic scenarios. One aspect of the ...

Whittaker, Colin J

2006-01-01T23:59:59.000Z

147

Temperature Trends of the U.S. Historical Climatology Network Based on Satellite-Designated Land Use/Land Cover  

Science Conference Proceedings (OSTI)

The 1221 weather observation stations that compose the U.S. Historical Climatology Network were designated as either urban, suburban, or rural based on data from the Defense Meteorological Satellite Program Operational Linescan System (OLS). The ...

Kevin P. Gallo; Timothy W. Owen; David R. Easterling; Paul F. Jamason

1999-05-01T23:59:59.000Z

148

New advances in designing energy efficient time synchronization schemes for wireless sensor networks  

E-Print Network (OSTI)

Time synchronization in wireless sensor networks (WSNs) is essential and significant for maintaining data consistency, coordination, and performing other fundamental operations, such as power management, security, and localization. Energy efficiency is the main concern in designing time synchronization protocols for WSNs because of the limited and generally nonrechargeable power resources. In this dissertation, the problem of time synchronization is studied in three different aspects to achieve energy efficient time synchronization in WSNs. First, a family of novel joint clock offset and skew estimators, based on the classical two-way message exchange model, is developed for time synchronization in WSNs. The proposed joint clock offset and skew correction mechanisms significantly increase the period of time synchronization, which is a critical factor in the over-all energy consumption required for global network synchronization. Moreover, the Cramer-Rao bounds for the maximum likelihood estimators are derived under two different delay assumptions. These analytical metrics serve as good benchmarks for the experimental results thus far reported. Second, this dissertation proposes a new time synchronization protocol, called the Pairwise Broadcast Synchronization (PBS), which aims at minimizing the number of message transmissions and implicitly the energy consumption necessary for global synchronization of WSNs. A novel approach for time synchronization is adopted in PBS, where a group of sensor nodes are synchronized by only overhearing the timing messages of a pair of sensor nodes. PBS requires a far smaller number of timing messages than other well-known protocols and incurs no loss in synchronization accuracy. Moreover, for densely deployed WSNs, PBS presents significant energy saving. Finally, this dissertation introduces a novel adaptive time synchronization protocol, named the Adaptive Multi-hop Timing Synchronization (AMTS). According to the current network status, AMTS optimizes crucial network parameters considering the energy efficiency of time synchronization. AMTS exhibits significant benefits in terms of energy-efficiency, and can be applied to various types of sensor network applications having different requirements.

Noh, Kyoung Lae

2007-08-01T23:59:59.000Z

149

Solar design and installation experience: an overview of results from the National Solar Data Network  

Science Conference Proceedings (OSTI)

Results, conclusions, and insights drawn from analysis of the various types of solar energy systems monitored by the National Solar Data Network (NSDN) are presented. Some NSDN sites have been monitored for over four years. Performance information, derived from accurately measured field data, are presented and may be related to design data for NSDN sites. Information is identified for such factors as: ratio of storage volume to collector area, heating and cooling loads, and collector area to building floor area. Relationships between these factors and solar performance may also be examined in terms of solar fraction and system efficiency.

Holte, H.O.; Kelly, C.J. (ed.)

1981-06-01T23:59:59.000Z

150

Actual versus design performance of solar systems in the National Solar Data Network  

Science Conference Proceedings (OSTI)

This report relates field measured performance to the designer predicted performance. The field measured data was collected by the National Solar Data Network (NSDN) over a period of six years. Data from 25 solar systems was selected from a data pool of some 170 solar systems. The scope of the project extends beyond merely presenting comparisons of data. There is an attempt to provide answers which will move the solar industry forward. As a result of some industry and research workshops, several concerns arose which can be partially allayed by careful study of the NSDN data. These are: What types of failures occurred and why. How good was the design versus actual performance. Why was predicted performance not achieved in the field. Which components should be integrated with a system type for good performance. Since the designs span several years and since design philosophies are quite variable, the measured results were also compared to f-Chart 5.1 results. This comparison is a type of normalization in that all systems are modeled with the same process. An added benefit of this normalization is a further validation of the f-Chart model on a fairly large scale. The systems were modeled using equipment design parameters, measured loads, and f-Chart weather data from nearby cities.

Logee, T.L.; Kendall, P.W.

1984-09-01T23:59:59.000Z

151

Design  

NLE Websites -- All DOE Office Websites (Extended Search)

Design Design of a Multithreaded Barnes-Hut Algorithm for Multicore Clusters Technical Report Junchao Zhang and Babak Behzad Department of Computer Science, University of Illinois at Urbana-Champaign {jczhang, bbehza2}@illinois.edu Marc Snir Department of Computer Science, University of Illinois at Urbana-Champaign and MCS Division, Argonne National Laboratory snir@anl.gov Abstract We describe in this paper an implementation of the Barnes-Hut al- gorithm on multicore clusters. Based on a partitioned global ad- dress space (PGAS) library, the design integrates intranode mul- tithreading and internode one-sided communication, exemplifying a PGAS + X programming style. Within a node, the computation is decomposed into tasks (subtasks), and multitasking is used to hide network latency. We study the tradeoffs between locality in private caches and locality in shared caches

152

Design and experimental evaluation of a vehicular network based on NEMO and MANET  

Science Conference Proceedings (OSTI)

Mobile Ad hoc Network (MANET) routing protocols and Network Mobility (NEMO) Basic Support are considered key technologies for vehicular networks. MANEMO, that is, the combination of MANET (for infrastructureless communications) and NEMO (for infrastructure-based ...

Manabu Tsukada; José Santa; Olivier Mehani; Yacine Khaled; Thierry Ernst

2010-03-01T23:59:59.000Z

153

Design, implementation and performance evaluation of security services for Underwater Acoustic Networks.  

E-Print Network (OSTI)

??Underwater Acoustic Networks (UANs), composed by Autonomous Underwater Vehicles (AUVs) are part of a new network paradigm that is being proposed for different uses like… (more)

MASSANTI, GIULIANO

2011-01-01T23:59:59.000Z

154

The GATE Boundary Layer Instrumentation System (BLIS)  

Science Conference Proceedings (OSTI)

A tethered sonde, the Boundary Layer Instrument System (BLIS), was designed for use from shipboard platforms in the GARP Atlantic Tropical Experiment (GATE). This system was able to monitor the thermal and kinematic properties of the boundary ...

Donald P. Wylie; Chester F. Ropelewski

1980-09-01T23:59:59.000Z

155

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

Science Conference Proceedings (OSTI)

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

Kuruganti, Phani Teja [ORNL

2012-01-01T23:59:59.000Z

156

Design and simulation on data-forwarding security in sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are the emerging information technology for monitoring equipment and ambient conditions of production lines in modern factories. A salient feature of wireless sensor networks is that nodes can relay sensing data to a factory ... Keywords: SQF, WSNs, energy consumption, industrial security, modelling, network security, packet delivery latency, reliability, routing, secure quasimultipath forwarding, wireless sensor networks

Men Long; Chwan-Hwa 'John' Wu

2009-10-01T23:59:59.000Z

157

Original article: Design of a medium voltage power converter-storage devices embedded in a hybrid emergency network for more electrical aircraft  

Science Conference Proceedings (OSTI)

The purpose of this paper is to present and describe a hybrid electrical network for an aircraft in emergency operation. The principle of this network is to hybridize, through a bidirectional DC/DC converter, a high speed turbine (Ram Air turbine - RAT) ... Keywords: Electrical network, Electrochemical storage, Energy management, Hybridization, Power converter design

R. Rigo Mariani, F. Lacressonniere, G. Fontes, X. Roboam

2013-05-01T23:59:59.000Z

158

Multi-hop Broadcast from Theory to Reality: Practical Design for Ad Hoc Networks  

E-Print Network (OSTI)

We propose a complete design for a scope limited, multihop broadcast middleware, which is adapted to the variability of the ad-hoc environment and works in unlimited ad-hoc networks such as a crowd in a city, or car passengers in a busy highway system. We address practical problems posed by: the impossibility to set the TTL correctly at all times, the poor performance of multiple access protocols in broadcast mode, flow control when there is no acknowledgment and scheduling of multiple concurrent broadcasts. Our design, called “Self Limiting Epidemic Forwarding” (SLEF), automatically adapts its behavior from single hop MAC layer broadcast to epidemic forwarding when the environment changes from being extremely dense to sparse, sporadically connected. A main feature of SLEF is a nonclassical manipulation of the TTL field, which combines the usual decrement-when-sending to many very small decrements when receiving. SLEF is intended as a replacement of k-hop limited broadcast for the unlimited ad-hoc setting. 1.

Alaeddine El Fawal

2007-01-01T23:59:59.000Z

159

SmartMote: Energy and VoI aware solar-powered sensor network design for environment monitoring  

Science Conference Proceedings (OSTI)

Due to advances in low power micro-sensor technology, energy harvesting techniques, we can now build large scale solar-powered sensor networks to support long-running operations. Solar powered sensors often harvest variable amounts of energy in different ... Keywords: routing,solar-powered system design,sensor

Cheng Bo, Xiang-Yang Li, Jing Yuan, Xiaohua Xu, Yunhao Li, Shao-Jie Tang

2012-10-01T23:59:59.000Z

160

CDM-based design and performance evaluation of a robust AQM method for dynamic TCP/AQM networks  

Science Conference Proceedings (OSTI)

A new robust AQM strategy for dynamically varying TCP/AQM networks is proposed and its performance is investigated through computer simulations in MATLAB and ns-2 environments. The developed AQM is designed based on coefficient diagram method (CDM), ... Keywords: Active queue management, Coefficient diagram method, Model reference adaptive control, Recursive parameter estimation

N. Bigdeli; M. Haeri

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

A Robust and Flexible Design for GCEP Unattended Online Enrichment Monitoring: An OLEM Collection Node Network  

SciTech Connect

Oak Ridge National Laoratory (ORNL) has engineered an on-line enrichment monitor (OLEM) to continuously measure U-235 emissions from the UF6 gas flowing through a unit header pipe of a gas centrifuge enrichment plant (GCEP) as a component of the International Atomic Energy Agency s (IAEA) new generation of technology to support enrichment plant safeguards1. In contrast to other enrichment monitoring approaches, OLEM calibrates and corrects for the pressure and temperature dependent UF6 gas-density without external radiation sources by using the inherent unit header pipe pressure dynamics and combining U-235 gamma-ray spectrometery using a shielded NaI detector with gas pressure and temperature data near the spectrum measurement point to obtain the enrichment of the gas as a function of time. From a safeguards perspective, OLEM can provide early detection of a GCEP being misused for production of highly enriched uranium, but would not detect directly the isolation and use of a cascade within the production unit to produce HEU. OLEM may also reduce the number of samples collected for destructive assay and, if coupled with load cell monitoring, could support isotope mass balance verification and unattended cylinder verification. The earlier paper presented OLEM as one component along with shared load cells and unattended cylinder verification, in the IAEA emering toolbox for unattended instruments at GCEPs1 and described the OLEM concept and how previous modeling studies and field measurements helped confirm the viability of a passive on-line enrichment monitor for meeting IAEA objectives and to support the development of performance targets. Phase I of the United States Support Program (USSP) OLEM project completed a preliminary hardware, software and communications design; phase II will build and test field prototypes in controlled laboratory settings and then at an operational facility. That paper also discussed many of the OLEM collection node commercial off the shelf (COTS) components and summarized the OLEM collection node data security provisions. This paper will discuss a secure and redundant network of OLEM collection nodes, auxiliary detection units and supporting junction boxes distributed throughout a facility for monitoring enrichment on product, feed and tails unit header pipes; the purpose and capability of the built-in Electronic Optical Sealing System (EOSS) network gateway; and a network approach for obtaining reliable and authenticated pressure measurements.

Younkin, James R [ORNL; March-Leuba, Jose A [ORNL; Garner, James R [ORNL

2013-01-01T23:59:59.000Z

162

Design and implementation of a framework for persistent identification and communication in emerging networks  

Science Conference Proceedings (OSTI)

The Internet Protocol (IP) is currently used to provide inter-networking among heterogeneous access networks. However, the evolution of and the innovation within these networks is greatly hindered by the geographical and topological rigidness of the ... Keywords: mobility, persistent identification, testbed

Joud S. Khoury; Henry Jerez; Luca De Cicco

2008-03-01T23:59:59.000Z

163

Design and implementation of a socket-level bandwidth aggregation mechanism for wireless networks  

Science Conference Proceedings (OSTI)

This paper proposes a mechanism to aggregate bandwidth of multiple network interfaces on a computer. Recently one single computer entails multiple different wireless network interfaces, such as IEEE 802.11a/b/g/n, Bluetooth, WiMAX, and so on. They can ... Keywords: bandwidth aggregation, heterogeneous wireless networks, multi-homed mobile host

Hiroshi Sakakibara; Masato Saito; Hideyuki Tokuda

2006-08-01T23:59:59.000Z

164

Survivable IP topology design with re-use of backup wavelength capacity in optical backbone networks  

Science Conference Proceedings (OSTI)

In IP-over-WDM networks, wavelength circuits are often protected by dedicated backup circuits. Especially with future deployment of 100 G transmission systems, this will induce huge under-utilization of backup resources. Network utilization can be boosted ... Keywords: Backup capacity, IP-over-WDM networks, Packet services, Survivable IP topology, Wavelength services

Chaitanya S. K. Vadrevu; Massimo Tornatore

2010-12-01T23:59:59.000Z

165

Design and implementation of a Linux SCSI target for storage area networks  

Science Conference Proceedings (OSTI)

This paper describes the architecture of a set of kernel components for developing and testing storage area network transport protocols under Linux. This software is intended for several uses: as a general prototype for network transport protocol development; ... Keywords: SCSI, iSCSI, storage area networks

Ashish Palekar; Narendran Ganapathy; Anshul Chadda; Robert D. Russell

2001-11-01T23:59:59.000Z

166

Survey Focal design issues affecting the deployment of wireless sensor networks for pipeline monitoring  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) are a target technology for oil and gas pipeline monitoring because they offer benefits of low cost, ease of deployment and ability to cater for data acquisition at great spatial and temporal scales. In order for WSN to ... Keywords: Energy harvesting, Localization, Network reliability, Oil and gas pipeline monitoring, Power efficiency, Sensing modality, Wireless sensor networks

Gbenga Owojaiye; Yichuang Sun

2013-05-01T23:59:59.000Z

167

Design and development of Ethernet-based storage area network protocol  

Science Conference Proceedings (OSTI)

In response to the trend of rapidly growing volume of and increasingly critical role played by data storage, there is a strong demand to share storage over network. In this paper, we present an Ethernet-based storage area network protocol, called HyperSCSI. ... Keywords: Ethernet, HyperSCSI, Network Storage, Protocol, SAN

Wilson Yong Hong Wang; Heng Ngi Yeo; Yao Long Zhu; Tow Chong Chong; Teck Yoong Chai; Luying Zhou; Jit Bitwas

2006-05-01T23:59:59.000Z

168

Complexity analysis and algorithm design for advance bandwidth scheduling in dedicated networks  

Science Conference Proceedings (OSTI)

An increasing number of high-performance networks provision dedicated channels through circuit switching or MPLS/GMPLS techniques to support large data transfer. The link bandwidths in such networks are typically shared by multiple users through advance ... Keywords: bandwidth scheduling, dedicated networks, nonapproximable

Yunyue Lin, Qishi Wu

2013-02-01T23:59:59.000Z

169

Data collection system design in SSM networks with unicast feedback: server message definition  

Science Conference Proceedings (OSTI)

The system for mass data collection with cumulative acknowledge is described in this paper. A server message for cumulative acknowledgement is specified. The system is development for single source multicast networks. These networks are characterized ... Keywords: RTCP, RTP, SSM and ASM networks, data collection, unicast feedback

Martin Koutny; Pavel Silhavy; Jiri Hosek

2009-02-01T23:59:59.000Z

170

Efficient BEM-based substrate network extraction in silicon SoCs  

Science Conference Proceedings (OSTI)

This paper is focused on the efficient extraction of the substrate network in complex system-on-chip designs. A boundary element method (BEM)-based approach, which employs spatial-frequency domain Green's function analysis, is considered and very high ... Keywords: Smart power integrated circuits, Substrate analysis, Substrate coupling, Substrate network extraction, System-on-chip

Paolo S. Crovetti; Franco L. Fiori

2008-12-01T23:59:59.000Z

171

Finding good candidate cycles for efficient p-cycle network design  

E-Print Network (OSTI)

Abstract- An important problem in p-cycle network design is to find a set of p-cycles to protect a given working capacity distribution so that the total spare capacity used by the p-cycles is minimized. Existing approaches for solving the problem include ILP and heuristic algorithm. Both require a set of candidate p-cycles to be precomputed. In this paper, we propose an algorithm to compute a small set of candidate p-cycles that can lead to good performance when used by ILP or the heuristic algorithm. The key idea of the algorithm is to generate a combination of high efficiency cycles and short cycles so that both densely distributed and sparsely distributed working capacities can he efficiently protected by the candidate cycles. The algorithm is also flexible in that the number of cycles generated is controlled by an input parameter. Simulation study showed that the cycles generated by our algorithm can lead to near optimal solutions when used by

Chang Liu; Lu Rum

2004-01-01T23:59:59.000Z

172

Design of a low-cost underwater acoustic modem for short- range sensor networks.  

E-Print Network (OSTI)

??Small, dense, wireless sensor networks are beginning to revolutionize our understanding of the physical world by providing fine resolution sampling of the surrounding environment. The… (more)

Benson, Bridget

2010-01-01T23:59:59.000Z

173

Design and evaluation of a hybrid sensor network for cane toad monitoring  

Science Conference Proceedings (OSTI)

This article investigates a wireless acoustic sensor network application—monitoring amphibian populations in the monsoonal woodlands of northern Australia. Our goal is to use automatic recognition of animal vocalizations to census the populations ... Keywords: Sensor networks, acoustic, application, high frequency sampling, hybrid, solar energy

Wen Hu; Nirupama Bulusu; Chun Tung Chou; Sanjay Jha; Andrew Taylor; Van Nghia Tran

2009-02-01T23:59:59.000Z

174

The design and evaluation of a mobile sensor/actuator network for autonomous animal control  

Science Conference Proceedings (OSTI)

This paper investigates a mobile, wireless sensor/actuator network application for use in the cattle breeding industry. Our goal is to prevent fighting between bulls in on-farm breeding paddocks by autonomously applying appropriate stimuli when one bull ... Keywords: application, autonomous animal control, sensor/actuator networks

Tim Wark; Chris Crossman; Wen Hu; Ying Guo; Philip Valencia; Pavan Sikka; Peter Corke; Caroline Lee; John Henshall; Kishore Prayaga; Julian O'Grady; Matt Reed; Andrew Fisher

2007-04-01T23:59:59.000Z

175

Design of QoS in Intelligent Communication Environments Based on Neural Network  

Science Conference Proceedings (OSTI)

Due to the latest developments in communication and computing, smart services and applications are being deployed for various applications such as entertainment, health care, smart homes, security and surveillance. In intelligent communication environments, ... Keywords: Congestion control, High-speed computer network, Intelligent communication environments, Neural network

N. Xiong; L. T. Yang; Y. Yang; J. H. Park; G. Wei

2011-01-01T23:59:59.000Z

176

Design of a Pulse Forming Network to Launch an Object Using Rail-Gun  

E-Print Network (OSTI)

This paper aims in the development of a Pulse Forming Network to feed energy to the rail-gun. The ultimate objective is to create a prototype of a pulse forming network that will act as a supply to the rail-gun.

unknown authors

2012-01-01T23:59:59.000Z

177

Ant colony optimization with fuzzy heuristic information designed for cooperative wireless sensor networks  

Science Conference Proceedings (OSTI)

Biologically inspired networking is becoming a very active area of research and development because methods from biology have attractive features such as scalability and resilience to changes in the environment. In this paper, the authors propose a cross-layer ... Keywords: ant colony optimization, cooperative modulation diversity, fuzzy heuristic information, wireless sensor networks

Marcelo Portela Sousa; Waslon Terllizzie A. Lopes; Marcelo Sampaio de Alencar

2011-10-01T23:59:59.000Z

178

Integration of task networks and cognitive user models using coloured Petri nets and its application to job design for safety and productivity  

Science Conference Proceedings (OSTI)

Changes of task demands due to unforeseen events and technological changes can cause variations in job design such as modifications to job procedures and task allocation. Failure to adapt to job design variations can lead to human errors that may have ... Keywords: Cognitive modelling, Coloured Petri nets, Human reliability, Job design, Safety, Task networks

Tom Kontogiannis

2005-11-01T23:59:59.000Z

179

Converting Boundary Representation Solid Models to Half-Space Representation Models for Monte Carlo Analysis  

SciTech Connect

Solid modeling computer software systems provide for the design of three-dimensional solid models used in the design and analysis of physical components. The current state-of-the-art in solid modeling representation uses a boundary representation format in which geometry and topology are used to form three-dimensional boundaries of the solid. The geometry representation used in these systems is cubic B-spline curves and surfaces--a network of cubic B-spline functions in three-dimensional Cartesian coordinate space. Many Monte Carlo codes, however, use a geometry representation in which geometry units are specified by intersections and unions of half-spaces. This paper describes an algorithm for converting from a boundary representation to a half-space representation.

Davis JE, Eddy MJ, Sutton TM, Altomari TJ

2007-03-01T23:59:59.000Z

180

Discrete Optimization and Agent-Based Simulation for Regional Evacuation Network Design Problem  

E-Print Network (OSTI)

Natural disasters and extreme events are often characterized by their violence and unpredictability, resulting in consequences that in severe cases result in devastating physical and ecological damage as well as countless fatalities. In August 2005, Hurricane Katrina hit the Southern coast of the United States wielding serious weather and storm surges. The brunt of Katrina’s force was felt in Louisiana, where the hurricane has been estimated to total more than $108 billion in damage and over 1,800 casualties. Hurricane Rita followed Katrina in September 2005 and further contributed $12 billion in damage and 7 fatalities to the coastal communities of Louisiana and Texas. Prior to making landfall, residents of New Orleans received a voluntary, and then a mandatory, evacuation order in an attempt to encourage people to move themselves out of Hurricane Katrina’s predicted destructive path. Consistent with current practice in nearly all states, this evacuation order did not include or convey any information to individuals regarding route selection, shelter availability and assignment, or evacuation timing. This practice leaves the general population free to determine their own routes, destinations and evacuation times independently. Such freedom often results in inefficient and chaotic utilization of the roadways within an evacuation region, quickly creating bottlenecks along evacuation routes that can slow individual egress and lead to significant and potentially dangerous exposure of the evacuees to the impending storm. One way to assist the over-burdened and over-exposed population during extreme event evacuation is to provide an evacuation strategy that gives specific information on individual route selection, evacuation timing and shelter destination assignment derived from effective, strategic pre-planning. For this purpose, we present a mixed integer linear program to devise effective and controlled evacuation networks to be utilized during extreme event egress. To solve our proposed model, we develop a solution methodology based on Benders Decomposition and test its performance through an experimental design using the Central Texas region as our case study area. We show that our solution methods are efficient for large-scale instances of realistic size and that our methods surpass the size and computational limitations currently imposed by more traditional approaches such as branch-and-cut. To further test our model under conditions of uncertain individual choice/behavior, we create an agent-based simulation capable of modeling varying levels of evacuee compliance to the suggested optimal routes and varying degrees of communication between evacuees and between evacuees and the evacuation authority. By providing evacuees with information on when to evacuate, where to evacuate and how to get to their prescribed destination, we are able to observe significant cost and time increases for our case study evacuation scenarios while reducing the potential exposure of evacuees to the hurricane through more efficient network usage. We provide discussion on scenario performance and show the trade-offs and benefits of alternative batch-time evacuation strategies using global and individual effectiveness measures. Through these experiments and the developed methodology, we are able to further motivate the need for a more coordinated and informative approach to extreme event evacuation.

Wang, Xinghua

2012-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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181

A Glider Network Design Study for a Synoptic View of the Oceanic Mesoscale Variability  

Science Conference Proceedings (OSTI)

This study presents an Observing System Simulation Experiment (OSSE) with a network of gliders in a realistic mesoscale field of eddies and filaments. The main objective is to demonstrate that the analysis skill evaluation, performed with ...

Blandine L'Hévéder; Laurent Mortier; Pierre Testor; François Lekien

2013-07-01T23:59:59.000Z

182

Design, Modeling, and Capacity Planning for Micro-solar Power Sensor Networks  

Science Conference Proceedings (OSTI)

This paper describes a systematic approach to building micro-solar power subsystems for wireless sensor network nodes. Our approach composes models of the basic pieces - solar panels, regulators, energy storage elements, and application loads - to appropriately ...

Jay Taneja; Jaein Jeong; David Culler

2008-04-01T23:59:59.000Z

183

The design and implementation of real-time environment monitoring systems based on wireless sensor networks  

Science Conference Proceedings (OSTI)

This research focuses on the implementation of a real-time environment monitoring system for environment detection using wireless sensor networks. The purpose of our research is to construct the system on the real-time environment with the technology ...

Kyung-Hoon Jung; Seok-Cheol Lee; Hyun-Suk Hwang; Chang-Soo Kim

2006-05-01T23:59:59.000Z

184

Bio-inspired energy-aware protocol design for cooperative wireless networks  

Science Conference Proceedings (OSTI)

In this work, bio-inspired cooperation rules are applied to wireless communication networks. The main goal is to derive cooperative behaviour rules to improve the energy consumption of each mobile device. A medium access control (MAC) protocol ...

Gian Paolo Perrucci; Puri Ardhy Anggraeni; Satya Ardhy Wardana; Frank H. P. Fitzek; Marcos D. Katz

2011-04-01T23:59:59.000Z

185

The NOAA Hydrometeorology Testbed Soil Moisture Observing Networks: Design, Instrumentation, and Preliminary Results  

Science Conference Proceedings (OSTI)

The NOAA Hydrometeorology Testbed (HMT) program has deployed soil moisture observing networks in the watersheds of the Russian River and the North Fork (NF) of the American River in northern California, and the San Pedro River in southeastern ...

Robert J. Zamora; F. Martin Ralph; Edward Clark; Timothy Schneider

2011-09-01T23:59:59.000Z

186

Receiver initiated MAC design for ad hoc networks based on multiuser detection  

Science Conference Proceedings (OSTI)

Recent technological developments in code division multiple access (CDMA) with multiuser detection (MUD) make multiple packets reception a more appropriate model for the physical layer of future wireless networks. To take advantage of the new features, ...

Jinfang Zhang; Zbigniew Dziong; Francois Gagnon; Michel Kadoch

2008-07-01T23:59:59.000Z

187

The Science DMZ: a network design pattern for data-intensive science  

Science Conference Proceedings (OSTI)

The ever-increasing scale of scientific data has become a significant challenge for researchers that rely on networks to interact with remote computing systems and transfer results to collaborators worldwide. Despite the availability of high-capacity ...

Eli Dart, Lauren Rotman, Brian Tierney, Mary Hester, Jason Zurawski

2013-11-01T23:59:59.000Z

188

Design and Analysis of Green Mission-Critical Fiber-Wireless Broadband Access Networks.  

E-Print Network (OSTI)

??In recent years, the ever-increasing environmental friendliness concern has made energy efficiency in telecom networks as an important theme in their operations. Meanwhile, mission-critical (MC)… (more)

Dhaini, Ahmad R.

2011-01-01T23:59:59.000Z

189

The design of a transceiver for packet video communication on an integrated services network  

Science Conference Proceedings (OSTI)

This article describes the architecture of a special Packet Video Transceiver, which is appropriate for the communication of broadcast television signals between two stations of an Integrated Services Network. The system performs line processing and ...

A. S. Andreatos; E. N. Protonotarios; G. De Grandi

1993-10-01T23:59:59.000Z

190

The design of sustainable wireless sensor network node using solar energy and phase change memory  

Science Conference Proceedings (OSTI)

Sustainability of wireless sensor network (WSN) is crucial to its economy and efficiency. While previous works have focused on solving the energy source limitation through solar energy harvesting, we reveal in this paper that sensor node's lifespan could ...

Ping Zhou, Youtao Zhang, Jun Yang

2013-03-01T23:59:59.000Z

191

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

E-Print Network (OSTI)

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.

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

2010-07-12T23:59:59.000Z

192

Evaluation of connection types in design for disassembly (DFD) using analytic network process  

Science Conference Proceedings (OSTI)

Design for disassembly (DFD) is an important design concept to make products more friendly for maintenance and remanufacturing practices. One of the important issues in DFD guidelines is related with the selection of the connectors used in the product. ... Keywords: ANP, Connectors, Design for disassembly, Disassembly, Environment

A?k?ner Güngör

2006-05-01T23:59:59.000Z

193

A Model-Based Design Approach for Wireless Sensor-Actuator Networks  

E-Print Network (OSTI)

at design time. For example, an HVAC system might have a control loop designed around reading temperature applications add unique challenges for model-based design frameworks because the system deployment view and feed the topology and link characteristic information to the system model. A developer can then use

Rajkumar, Ragunathan

194

Designing heterogeneous ECU networks via compact architecture encoding and hybrid timing analysis  

Science Conference Proceedings (OSTI)

In this paper, a design method for automotive architectures is proposed. The two main technical contributions are (i) a novel hardware/software architecture encoding that unifies a number of design steps, i.e., resource allocation, process binding, ... Keywords: automotive, design space exploration, timing analysis

Michael Glaß; Martin Lukasiewycz; Jürgen Teich; Unmesh D. Bordoloi; Samarjit Chakraborty

2009-07-01T23:59:59.000Z

195

Design and implementation of an intelligent end-to-end network QoS system  

Science Conference Proceedings (OSTI)

End-to-End guaranteed network QoS is a requirement for predictable data transfers between geographically distant end-hosts. Existing QoS systems, however, do not have the capability/intelligence to decide what resources to reserve and which paths to ...

Sushant Sharma; Dimitrios Katramatos; Dantong Yu; Li Shi

2012-11-01T23:59:59.000Z

196

Design and Implementation of Remote-Controlled Smart Home Network for Energy Saving and Carbon Reduction  

Science Conference Proceedings (OSTI)

Due to the lack of energy and greenhouse effect, how to building a smart home network for energy saving and carbon reduction is an important issue in the world. This paper presents a remote-control smart home energy conservation system with infrared ... Keywords: Energy saving, Smart Grid, Smart power controller, Energy Management

Ying-Chang Hsiao; Wen-Ping Chen; Jen-Chih Hsu; Yuan-Hsu Chang Chien

2012-10-01T23:59:59.000Z

197

Research and design of meter reading system based on ZigBee wireless sensor network  

Science Conference Proceedings (OSTI)

With the rapid development of wireless technologies, it is possible for Chinese automatic meter reading system (AMRS) to be equipped with wireless sensor networks due to their low-cost, simplicity and mobility. In the current study, we compared the advantages ... Keywords: IEEE802.15.4, JN5121, ZigBee, profile, wireless meter reading

Dechao Sun; Shaohua Zheng

2009-01-01T23:59:59.000Z

198

Design Considerations for a Large-Scale Wireless Sensor Network for Substation Monitoring  

E-Print Network (OSTI)

's substation managers and engineers due to the aging nature of substation equipment and infrastructure of low-power wireless sensor networks, utility companies have also begun to investigate the potential was a contractor for the EPRI project. There were multiple utility members in the EPRI project. This paper focusses

Nasipuri, Asis

199

Design and analysis of an adaptive object replication algorithm in distributed network systems  

Science Conference Proceedings (OSTI)

In this paper, we propose an adaptive object replication algorithm for distributed network systems, analyze its performance from both theoretical and experimental standpoints. We first present a mathematical cost model that considers all the costs associated ... Keywords: Allocation scheme, Communication cost, Competitive analysis, I/O cost, Object replication

Lin Wujuan; Bharadwaj Veeravalli

2008-06-01T23:59:59.000Z

200

Design of a zigbee-based RFID network for industry applications  

Science Conference Proceedings (OSTI)

In this paper, the implementation of a ZigBee based integrated WSN and RFID system suitable for an industrial environment is explained. The overall system consists of a central monitoring station connected to local stations through Ethernet backbone. ... Keywords: rfid and zigbee, wireless networks, wns

Sumi M; Ebrahim A. Soujeri; Rahim Rajan; Harikrishnan A. I

2009-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

RadiaLE: A framework for designing and assessing link quality estimators in wireless sensor networks  

Science Conference Proceedings (OSTI)

Stringent cost and energy constraints impose the use of low-cost and low-power radio transceivers in large-scale wireless sensor networks (WSNs). This fact, together with the harsh characteristics of the physical environment, requires a rigorous WSN ... Keywords: Channel, Experimentation, Link quality estimation, Measurements, Performance, Testbed, Traffic pattern

Nouha Baccour; Anis Koubía; Maissa Ben Jamía; Denis do Rosário; Habib Youssef; Mário Alves; Leandro B. Becker

2011-09-01T23:59:59.000Z

202

Reclaimed water distribution network design under temporal and spatial growth and demand uncertainties  

Science Conference Proceedings (OSTI)

A significant-but underutilized-water resource is reclaimed water, i.e., treated wastewater that is reintroduced for various purposes. Especially in water scarce regions, reclaimed water is often the only remaining source of water to meet increasing ... Keywords: Demand and network growth uncertainty, Reclaimed water distribution system, Stochastic optimization, Water resources management

Weini Zhang, Gunhui Chung, Péguy Pierre-Louis, Güzin Bayraksan, Kevin Lansey

2013-11-01T23:59:59.000Z

203

Lower power RF transceiver modeling and design for wireless microsensor networks  

E-Print Network (OSTI)

The design of wireless microsensor systems has gained increasing importance for a variety of civil and military applications. With the objective of providing short-range connectivity with significant fault tolerance, these ...

Wang, Andrew Yu, 1976-

2005-01-01T23:59:59.000Z

204

An evaluation of grain boundary engineering technology and processing scale-up  

E-Print Network (OSTI)

Grain boundary engineering is the manipulation of low stacking-fault energy, face- centered cubic material microstructures to break the connectivity of the general grain boundary network through the addition of special ...

Zelinski, Jeffrey A

2005-01-01T23:59:59.000Z

205

Radio Planning of Energy-Aware Cellular Networks  

E-Print Network (OSTI)

Nov 3, 2010 ... Keywords: green networking, wireless, network design, coverage, network management, energy saving. Category 1: Applications -- OR and ...

206

Adiabatic Eastern Boundary Currents  

Science Conference Proceedings (OSTI)

The dynamics of the eastern boundary current of a high-resolution, idealized model of oceanic circulation are analyzed and interpreted in terms of residual mean theory. In this framework, it is clear that the eastern boundary current is adiabatic ...

Paola Cessi; Christopher L. Wolfe

2013-06-01T23:59:59.000Z

207

Determination of Optimal Process Flowrates and Reactor Design for Autothermal Hydrogen Production in a Heat-Integrated Ceramic Microchannel Network  

E-Print Network (OSTI)

The present work aimed at designing a thermally efficient microreactor system coupling methanol steam reforming with methanol combustion for autothermal hydrogen production. A preliminary study was performed by analyzing three prototype reactor configurations to identify the optimal radial distribution pattern upon enhancing the reactor self-insulation. The annular heat integration pattern of Architecture C showed superior performance in providing efficient heat retention to the system with a 50 - 150 degrees C decrease in maximum external-surface temperature. Detailed work was performed using Architecture C configuration to optimize the catalyst placement in the microreactor network, and optimize reforming and combustion flows, using no third coolant line. The optimized combustion and reforming catalyst configuration prevented the hot-spot migration from the reactor midpoint and enabled stable reactor operation at all process flowrates studied. Best results were obtained at high reforming flowrates (1800 sccm) with an increase in combustion flowrate (300 sccm) with the net H2 yield of 53% and thermal efficiency of >80% from methanol with minimal insulation to the heatintegrated microchannel network. The use of the third bank of channels for recuperative heat exchange by four different reactor configurations was explored to further enhance the reactor performance; the maximum overall hydrogen yield was increased to 58% by preheating the reforming stream in the outer 16 heat retention channels. An initial 3-D COMSOL model of the 25-channeled heat-exchanger microreactor was developed to predict the reactor hotspot shape, location, optimum process flowrates and substrate thermal conductivity. This study indicated that low thermal conductivity materials (e.g. ceramics, glass) provides enhanced efficiencies than high conductivity materials (e.g. silicon, stainless steel), by maintaining substantial thermal gradients in the system through minimization of axial heat conduction. Final summary of the study included the determination of system energy density; a gravimetric energy density of 169.34 Wh/kg and a volumetric energy density of 506.02 Wh/l were achieved from brass architectures for 10 hrs operation, which is higher than the energy density of Li-Ion batteries (120 Wh/kg and 350 Wh/l). Overall, this research successfully established the optimal process flowrates and reactor design to enhance the potential of a thermally-efficient heat-exchanger microchannel network for autothermal hydrogen production in portable applications.

Damodharan, Shalini

2012-05-01T23:59:59.000Z

208

Electronically controllable transmission line design for traveling wave array antenna feed network  

E-Print Network (OSTI)

In this thesis, an electronically controllable transmission line (ECTL) is presented. By modulating the conductivity of a doped Si modulator in the ECTL, the wave propagation constant in the ECTL is controlled. Measured results show a phase change in the ECTL at a single frequency when non-zero bias voltage is applied. This ECTL is implemented in order to feed a traveling wave array antenna, which is composed of 8 aperture-coupled microstrip antenna elements. It is demonstrated that phase change in an ECTL feed line has applications as a traveling wave array antenna with beam steering. S-parameter measurements are presented which demonstrate phase change in an ECTL and main beam steering of an 8-element traveling wave array antenna. The design procedure for an aperture-coupled microstrip antenna with a specific input impedance at the resonant frequency and a matching circuit design for a traveling wave array antenna are discussed in detail.

Shin, Chang-Seok

2002-01-01T23:59:59.000Z

209

A System Level Boundary Scan Controller Board for VME Applications  

Science Conference Proceedings (OSTI)

In this article an application of boundary scan test at system level is analyzed. The objective is met through the description of the design and implementation options of a VME boundary scan controller board prototype and the corresponding software. ... Keywords: ATPG, IEEE 1149.1 boundary scan test, board level test and system level test

Nuno Cardoso; Carlos Beltrán Almeida; José Carlos Da Silva

2001-06-01T23:59:59.000Z

210

An expert system design for a crude oil distillation column with the neural networks model and the process optimization using genetic algorithm framework  

Science Conference Proceedings (OSTI)

In this study an expert system of a crude oil distillation column is designed to predict the unknown values of required product flow and temperature in required input feed characteristics. The system is also capable to optimize the distillation process ... Keywords: Distillation column, Expert system, Genetic algorithms, Neural networks model

S. Motlaghi; F. Jalali; M. Nili Ahmadabadi

2008-11-01T23:59:59.000Z

211

Conceptual Design of a Strategic Power Infrastructure Defense (SPID) System: EPRI/DoD Complex Interactive Networks/Systems Initiativ e; First Annual Report  

Science Conference Proceedings (OSTI)

This report describes research sponsored by EPRI and the Department of Defense for the Initiative on Complex Interactive Networks / Systems. Through this initiative, the Advanced Power Technologies (APT) Consortium has developed a conceptual design of the Strategic Power Infrastructure Defense (SPID) system. This first annual report from the APT Consortium describes hidden failures and how they contribute to catastrophic failures of bulk power systems.

2000-05-24T23:59:59.000Z

212

Modeling, Design and Construction of Articulated Hand for Use in Prosthetics, with Adaptive Control in Neural Networks Based on Mathematical Model for Finger  

Science Conference Proceedings (OSTI)

An Articulated hand model was designed and built by CAD-CAM software, analyzed by finite element in the structure; the hand was made for a 3D printer in a first time, the construction of each finger suggested a mathematical model that describes the Inertia ... Keywords: Prosthetics, Adaptive Control by Neural Networks, Myoelectric Signal, Mathematical Model of 3G

Emilio Soto; Oscar Baez; Sergio Sosa

2010-11-01T23:59:59.000Z

213

Estimation of a semi-physical GLBE model using dual EnKF learning algorithm coupled with a sensor network design strategy: Application to air field monitoring  

Science Conference Proceedings (OSTI)

In this paper, we present the fusion of two complementary approaches for modeling and monitoring the spatio-temporal behavior of a fluid flow system. We also propose a mobile sensor deployment strategy to produce the most accurate estimate of the true ... Keywords: Air field monitoring, Grey-box modeling, Model fusion, Sensor network design

Gilles Roussel, Laurent Bourgois, Mohammed Benjelloun, Gilles Delmaire

2013-10-01T23:59:59.000Z

214

Network Simulation  

SciTech Connect

A detailed introduction to the design, implementation and use of network simulation tools is presented. The requirements and issues faced in the design of simulators for wired and wireless networks are discussed. Abstractions such as packet- and fluid-level network models are covered. Several existing simulations are given as examples, with details and rationales regarding design decisions presented. Issues regarding performance and scalability are discussed in detail, describing how one can utilize distributed simulation methods to increase the scale and performance of a simulation environment. Finally, a case study of two simulation tools is presented that have been developed using distributed simulation techniques. This text is essential to any student, researcher or network architect desiring a detailed understanding of how network simulation tools are designed, implemented, and used.

Fujimoto, Richard [ORNL; Perumalla, Kalyan S [ORNL; Riley, George F. [Georgia Institute of Technology

2006-01-01T23:59:59.000Z

215

Designing Logical Rules to Model the Response of Biomolecular Networks with Complex Interactions: An Application to Cancer Modeling  

Science Conference Proceedings (OSTI)

We discuss the propagation of constraints in eukaryotic interaction networks in relation to model prediction and the identification of critical pathways. In order to cope with posttranslational interactions, we consider two types of nodes in the network, ... Keywords: Systems biology, regulatory networks, posttranslational effects, in-silico analysis, automatic reasoning, cancer.

Carito Guziolowski; Sylvain Blachon; Tatiana Baumuratova; Gautier Stoll; Ovidiu Radulescu; Anne Siegel

2011-09-01T23:59:59.000Z

216

Membranes with a boundary  

E-Print Network (OSTI)

We investigate the recently developed theory of multiple membranes. In particular, we consider open membranes, i.e. the theory defined on a membrane world volume with a boundary. We first restrict our attention to the gauge sector of the theory. We obtain a boundary action from the Chern-Simons terms. Secondly, we consider the addition of certain boundary terms to various Chern-Simons theories coupled to matter. These terms ensure the full bulk plus boundary action has the correct amount of supersymmetry. For the ABJM model, this construction motivates the inclusion of a boundary quartic scalar potential. The boundary dynamics obtained from our modified theory produce Basu-Harvey type equations describing membranes ending on a fivebrane. The ultimate goal of this work is to throw light on the theory of fivebranes using the theory of open membranes.

David S Berman; Daniel C Thompson

2009-04-01T23:59:59.000Z

217

Grain Boundaries and Interfaces  

Science Conference Proceedings (OSTI)

Oct 8, 2012 ... Applying this algorithm to symmetric tilt grain boundaries offers direct links ... recognized role as an influential component of microstructure.

218

Securing network access in wireless sensor networks  

Science Conference Proceedings (OSTI)

In wireless sensor networks, it is critical to restrict the network access only to eligible sensor nodes, while messages from outsiders will not be forwarded in the networks. In this paper, we present the design, implementation, and evaluation of a secure ... Keywords: elliptic curve cryptography, security, sensor networks

Kun Sun; An Liu; Roger Xu; Peng Ning; Douglas Maughan

2009-03-01T23:59:59.000Z

219

Placement of network services in a sensor network  

Science Conference Proceedings (OSTI)

An important challenge in designing a wireless sensor network is to maximise the network's lifetime. In a hierarchical cluster-based network, a key design issue is the placement of cluster heads (data loggers) such that the total power ... Keywords: beacons, cluster heads, clustering, data loggers, energy conservation, sensor localisation, service placement, wireless networks, wireless sensor networks

Jennifer Yick; Gregory Pasternack; Biswanath Mukherjee; Dipak Ghosal

2006-02-01T23:59:59.000Z

220

Computer Networks and ISDN Systems, February, 1999. Architectural Considerations in the design of WDM-based Optical Access  

E-Print Network (OSTI)

and coax infrastructure already exists, hybrid architectures that utilize the existing copper or coax have of communication networks has transformed the way we live and work. As we progress further into the information age. The access network refers #12;to the portion of the communication infrastructure responsible for reaching

Modiano, Eytan

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Dirac fermion wave guide networks on topological insulator surfaces  

E-Print Network (OSTI)

Magnetic texturing on the surface of a topological insulator allows the design of wave guide networks and beam splitters for domain-wall Dirac fermions. Guided by simple analytic arguments we model a Dirac fermion interferometer consisting of two parallel pathways, whereby a newly developed staggered-grid leap-frog discretization scheme in 2+1 dimensions with absorbing boundary conditions is employed. The net transmission can be tuned between constructive to destructive interference, either by variation of the magnetization (path length) or an applied bias (wave length). Based on this principle, a Dirac fermion transistor is proposed. Extensions to more general networks are discussed.

René Hammer; Christian Ertler; Walter Pötz

2012-05-31T23:59:59.000Z

222

SLE boundary visits  

E-Print Network (OSTI)

We study the probabilities with which chordal Schramm-Loewner Evolutions (SLE) visit small neighborhoods of boundary points. We find explicit formulas for general chordal SLE boundary visiting probability amplitudes, also known as SLE boundary zig-zags or order refined SLE multi-point Green's functions on the boundary. Remarkably, an exact answer can be found to this important SLE question for an arbitrarily large number of marked points. The main technique employed is a spin chain - Coulomb gas correspondence between tensor product representations of a quantum group and functions given by Dotsenko-Fateev type integrals. We show how to express these integral formulas in terms of regularized real integrals, and we discuss their numerical evaluation. The results are universal in the sense that apart from an overall multiplicative constant the same formula gives the amplitude for many different formulations of the SLE boundary visit problem. The formula also applies to renormalized boundary visit probabilities for interfaces in critical lattice models of statistical mechanics: we compare the results with numerical simulations of percolation, loop-erased random walk, and Fortuin-Kasteleyn random cluster models at Q=2 and Q=3, and find good agreement.

Niko Jokela; Matti Järvinen; Kalle Kytölä

2013-11-10T23:59:59.000Z

223

Use of Synthetic Data to Test Flight Patterns for a Boundary Layer Field Experiment  

Science Conference Proceedings (OSTI)

A virtual research aircraft was flown through a synthetic atmospheric boundary layer to help design a real flight plan that would allow robust turbulence statistics to be obtained in a heterogeneous, evolving, convective boundary layer. The ...

Edi Santoso; Roland Stull

1999-09-01T23:59:59.000Z

224

ILP formulations for non-simple p-cycle and p-trail design in WDM mesh networks  

Science Conference Proceedings (OSTI)

Conventional simple p-cycle (Preconfigured Protection Cycle) concept allows fast and capacity-efficient span protection in WDM mesh networks. Unlike simple p-cycle, non-simple p-cycle can traverse a node or span multiple times. The recently proposed ... Keywords: Fast span protection, WDM (Wavelength Division Multiplexing), p-Cycle (Preconfigured Protection Cycle), p-Trail (Pre-Cross-Connected Trail)

Bin Wu; Kwan L. Yeung; Pin-Han Ho

2010-04-01T23:59:59.000Z

225

Design Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

Design Design Specifications Services Overview ECS Audio/Video Conferencing Fasterdata IPv6 Network Network Performance Tools (perfSONAR) ESnet OID Registry PGP Key Service Virtual Circuits (OSCARS) OSCARS Case Study Documentation User Manual FAQ Design Specifications Functional Specifications Notifications Publications Authorization Policy Default Attributes Message Security Clients For Developers Interfaces Links Hardware Requirements DOE Grids Service Transition Contact Us Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net Design Specifications OSCARS Reservation Manager - Design Specifications Year 3 Update (DRAFT) David Robertson, Chin Guok

226

Lovett et al 13-1653 1 High-speed Rail Network Design and Station Location1  

E-Print Network (OSTI)

systems were principally government projects, public-private35 partnerships are increasingly being used principally53 government projects, public-private partnerships (PPP) are increasingly being used to design,54

Barkan, Christopher P.L.

227

Networking RP @ DISI Fabrizio Granelli, Lab Coordinator  

E-Print Network (OSTI)

S and resource management Wireless mesh networks: WiFi, WiMax Cellular: transmission, protocols and network and management Distributed signaling Overlay to network mapping and cooperation Research Topics: Protocol Design-Layering Performance Improvement in Wireless Networks Congestion Control GRID & Overlay Networks Design of Wireless

Granelli, Fabrizio

228

Deformation and Transitions at Grain Boundaries  

Science Conference Proceedings (OSTI)

Formation of cell-wall structure during deformation • Intragranular boundaries: GNBs, IDBs, cell-block boundaries, etc. ... Hot Spots and Grain Boundaries.

229

Stratigraphic Boundaries | Open Energy Information  

Open Energy Info (EERE)

Stratigraphic Boundaries Stratigraphic Boundaries Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Stratigraphic Boundaries Dictionary.png Stratigraphic Boundaries: No definition has been provided for this term. Add a Definition Controlling Structures List of controlling structures typically associated with geothermal systems: Major Normal Fault Termination of a Major Normal Fault Stepover or Relay Ramp in Normal Fault Zones Apex or Salient of Normal Fault Fault Intersection Accommodation Zone Displacement Transfer Zone Pull-Apart in Strike-Slip Fault Zone Intrusion Margins and Associated Fractures Stratigraphic Boundaries Fissure Swarms Caldera Rim Margins Lithologically Controlled Hydrothermal circulation may occur at the contacts between different lithologies. Examples

230

Wireless sensor networks for habitat monitoring  

Science Conference Proceedings (OSTI)

We provide an in-depth study of applying wireless sensor networks to real-world habitat monitoring. A set of system design requirements are developed that cover the hardware design of the nodes, the design of the sensor network, and the capabilities ... Keywords: environmental monitoring, habitat monitoring, low power systems, sensor network architecture, wireless sensor networks

Alan Mainwaring; David Culler; Joseph Polastre; Robert Szewczyk; John Anderson

2002-09-01T23:59:59.000Z

231

Wireless sensor network operating systems: a survey  

Science Conference Proceedings (OSTI)

The design of operating system for Wireless Sensor Network (WSN) deviates from the traditional operating system design due to their specific characteristics like constrained resources, high dynamics and inaccessible deployment environments. We ... Keywords: TinyOS, WSN operating systems, WSNs, ad-hoc networks, applications, characteristics, classification framework, design, embedded systems, reprogramming, survey, virtual machines, wireless networks, wireless sensor networks

Adi Mallikarjuna V. Reddy; A.V.U. Phani Kumar; D. Janakiram; G. Ashok Kumar

2009-08-01T23:59:59.000Z

232

Steps to an Ecology of Networked Knowledge and Innovation: Enabling new forms of collaboration among sciences, engineering, arts, and design  

E-Print Network (OSTI)

The final White Papers (posted at http://seadnetwork.wordpress.com/white-paper- abstracts/final-white-papers/) represent a spectrum of interests in advocating for transdisciplinarity among arts, sciences, and technologies. All authors submitted plans of action and identified stakeholders they perceived as instrumental in carrying out such plans. The individual efforts led to an international scope. One of the important characteristics of this collection is that the papers do not represent a collective aim toward an explicit initiative. Rather, they offer a broad array of views on barriers faced and prospective solutions. In summary, the collected White Papers and associated Meta- analyses began as an effort to take the pulse of the SEAD community as broadly as possible. The ideas they generated provide a fruitful basis for gauging trends and challenges in facilitating the growth of the network and implementing future SEAD initiatives.

Malina, Roger; Strohecker, Carol; LaFayette, Carol; Ione, Amy

2013-07-31T23:59:59.000Z

233

Power Management in Disruption Tolerant Networks .  

E-Print Network (OSTI)

??Disruption Tolerant Networks (DTNs) are mobile wireless networks that are designed to work in highly-challenged environments where the density of nodes is insufficient to support… (more)

Jun, Hyewon

2007-01-01T23:59:59.000Z

234

Intelligent Fluid Infrastructure for Embedded Networking  

E-Print Network (OSTI)

mobile element into the networking infrastructure.Our fluid infrastructure design saves significant energy inIntelligent Fluid Infrastructure for Embedded Networks Aman

Kansal, Aman; Somasundara, Arun; Jea, David C; Srivastava, Mani B; Estrin, D

2004-01-01T23:59:59.000Z

235

Ontology-based modeling and integration of morphological characteristics of assembly joints for network-based collaborative assembly design  

Science Conference Proceedings (OSTI)

This paper presents our research on developing an ontology-based framework that can represent morphological characteristics related to assembly joints. Joints within the physical structure of an assembly are inevitable because of the limitations of component ... Keywords: Collaborative Product Design, Mereotopology, Morphological Characteristics, Ontology, Semantic Web Rule Language

Kyoung-yun Kim; Seongah Chin; Ohbyung Kwon; R. darin Ellis

2009-02-01T23:59:59.000Z

236

Design and power management of a solar-powered “Cool Robot” for polar instrument networks: Research Articles  

Science Conference Proceedings (OSTI)

The Cool Robot is a four-wheel-drive, solar-powered, autonomous robot designed to support summertime science campaigns in Antarctica and Greenland over distances exceeding 500 km. This paper provides an overview of key features of the robot, including ...

Laura E. Ray; James H. Lever; Alexander D. Streeter; Alexander D. Price

2007-07-01T23:59:59.000Z

237

Set separation Neural Network paradigms  

E-Print Network (OSTI)

for forecasting financial time series 29 f´evrier 2008 Designing a neural network for forecasting financial time for forecasting financial time series #12;Neural Net The inputs Set separation Neural Network paradigms From network for forecasting financial time series #12;Neural Net The inputs Set separation Neural Network

Chen, Yiling

238

A User Driven Dynamic Circuit Network Implementation  

E-Print Network (OSTI)

LCG-EGEE- 20080426.pdf ESnet (2008) [Online]. Available:the DOE Energy Science Network (ESnet) [5] has designed andIP core network. The ESnet IP core network is architected

Guok, Chin

2009-01-01T23:59:59.000Z

239

An overlay architecture for vehicular networks  

Science Conference Proceedings (OSTI)

We propose and discuss an overlay architecture relying on a mobile ad hoc network, called Arigatoni on wheels (Ariwheels for short). More specifically, Ariwheels is a virtual network organization that is designed for a vehicular network underlay environment. ...

Luigi Liquori; Diego Borsetti; Claudio Casetti; Carla-Fabiana Chiasserini

2008-05-01T23:59:59.000Z

240

Boundary Plasma Turbulence Simulations for Tokamaks  

SciTech Connect

The boundary plasma turbulence code BOUT models tokamak boundary-plasma turbulence in a realistic divertor geometry using modified Braginskii equations for plasma vorticity, density (ni), electron and ion temperature (T{sub e}; T{sub i}) and parallel momenta. The BOUT code solves for the plasma fluid equations in a three dimensional (3D) toroidal segment (or a toroidal wedge), including the region somewhat inside the separatrix and extending into the scrape-off layer; the private flux region is also included. In this paper, a description is given of the sophisticated physical models, innovative numerical algorithms, and modern software design used to simulate edge-plasmas in magnetic fusion energy devices. The BOUT code's unique capabilities and functionality are exemplified via simulations of the impact of plasma density on tokamak edge turbulence and blob dynamics.

Xu, X; Umansky, M; Dudson, B; Snyder, P

2008-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Grain Boundary Percolation Modeling of Fission Gas Release in Oxide Fuels  

Science Conference Proceedings (OSTI)

We present a new approach to fission gas release modeling in oxide fuels based on grain boundary network percolation. The method accounts for variability in the bubble growth and coalescence rates on individual grain boundaries, and the resulting effect on macroscopic fission gas release. Two-dimensional representa- tions of fuel pellet microstructures are considered, and the resulting gas release rates are compared with traditional two-stage Booth models, which do not account for long-range percolation on grain boundary net- works. The results show that the requirement of percolation of saturated grain boundaries can considerably reduce the total gas release rates, particularly when gas resolution is considered.

Paul C. Millett; Michael R. Tonks; S. B. Biner

2012-05-01T23:59:59.000Z

242

On the design of a novel two-objective harmony search approach for distance- and connectivity-based localization in wireless sensor networks  

Science Conference Proceedings (OSTI)

In several wireless sensor network applications the availability of accurate nodes' location information is essential to make collected data meaningful. In this context, estimating the positions of all unknown-located nodes of the network based on noisy ... Keywords: Flip ambiguity, Harmony Search, Localization, Multi-objective, Wireless Sensor Networks

Diana Manjarres; Javier Del Ser; Sergio Gil-Lopez; Massimo Vecchio; Itziar Landa-Torres; Sancho Salcedo-Sanz; Roberto Lopez-Valcarce

2013-02-01T23:59:59.000Z

243

Design of an Enhanced Handover Algorithm Based on a New Adaptive SR-ARQ for Next-Generation Mobile Communication Networks  

Science Conference Proceedings (OSTI)

Next-generation mobile communication networks are supposed to provide various high capacity multimedia services to mobile users using various kinds of access networks. Among them, the WiNGS system developed by ETRI as one of 4G mobile system provides ... Keywords: Mobile communication networks, handover performance, SR-ARQ, reordering, WiNGS system

Man Kyu Park; Yun Chul Choi; Jae Yone Lee; Byung Chul Kim; Dae Young Kim; Jae Ho Kim

2008-12-01T23:59:59.000Z

244

Incentive Pricing in Multi-Class Communication Networks  

Science Conference Proceedings (OSTI)

We consider a communication network that offers multi-class services to multiple types of traffic. Users choose service classes so as to optimize their own performance. The network associates with each traffic type a nominal service class. Optimal prices ... Keywords: Network pricing, multi-class networks, network control, network design and management, game theory, broadband networking

Ariel Orda; Nahum Shimkin

1997-04-01T23:59:59.000Z

245

Handover strategy of smart mobile terminals among heterogeneous wireless networks  

Science Conference Proceedings (OSTI)

Due to the variety of wireless networks, the handover among heterogeneous wireless networks has become a research hotspot in recent years. More attention have been paid to the radio access network and the core network than the terminal side. In the future ... Keywords: heterogeneous wireless network, network handover, network handover design, smart mobile terminal

Wei Lin; Weiqiang Wu; Qinyu Zhang

2008-07-01T23:59:59.000Z

246

Virtual urban traffic network simulator  

E-Print Network (OSTI)

In this project, I designed and implemented a virtual urban traffic network simulator. The simulator serves as a testbed for human-subject experiments to determine driver behavior in road networks and also as a platform ...

Uh, Jason (Jason J.)

2011-01-01T23:59:59.000Z

247

Boundary stabilization of transmission problems  

E-Print Network (OSTI)

We study the transmission problem in bounded domains with dissipative boundary conditions. Under some natural assumptions, we prove uniform bounds of the corresponding resolvents on the real axis at high frequency, and as a consequence, we obtain free of eigenvalues regions. As an application, we get exponential decay of the energy of the solutions of the correpsonding mixed boundary value problems.

Fernando Cardoso; Georgi Vodev

2009-10-20T23:59:59.000Z

248

Network Characterization Service (NCS)  

Science Conference Proceedings (OSTI)

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.

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

2001-06-06T23:59:59.000Z

249

Parallel simulation of software defined networks  

Science Conference Proceedings (OSTI)

Existing network architectures fall short when handling networking trends, e.g., mobility, server virtualization, and cloud computing, as well as market requirements with rapid changes. Software-defined networking (SDN) is designed to transform network ... Keywords: parallel discrete event simulation, software-defined networking

Dong Jin, David M. Nicol

2013-05-01T23:59:59.000Z

250

Boundary Analysis for H2 Production by Fermentation  

NLE Websites -- All DOE Office Websites (Extended Search)

Boundary Analysis for Boundary Analysis for H2 Production by Fermentation Submitted To: National Renewable Energy Laboratory by Tim Eggeman, Ph.D., P.E. Neoterics International March 12, 2004 Bioprocess * Energy * Chemicals * Polymers NEOTERICS INTERNATIONAL Using Technology to Create Business Innovation 303-358-6390 2319 S. Ellis Ct. time@frii.com Lakewood, CO 80228 March 12, 2004 Margaret Mann National Renewable Energy Laboratory 1617 Cole Boulevard, MS 1613 Golden, CO 80401 Dear Maggie: Enclosed is a conceptual design and order-of-magnitude economic analysis for the production of hydrogen by fermentation of carbohydrates under the following design basis:

251

An Evaluation of Boundary Conditions for Modeling Urban Boundary Layers  

DOE Green Energy (OSTI)

Numerical modeling of the urban boundary layer is complicated by the need to describe airflow patterns outside of the computational domain. These patterns have an impact on how successfully the simulation is able to model the turbulence associated with the urban boundary layer. This talk presents experiments with the model boundary conditions for simulations that were done to support two Department of Energy observational programs involving the Salt Lake City basin. The Chemical/Biological Non-proliferation Program (CBNP) is concerned with the effects of buildings on influencing dispersion patterns in urban environments. The Vertical Transport and Mixing Program (VTMX) investigating mixing mechanisms in the stable boundary layer and how they are influenced by the channeling caused by drainage flows or by obstacles such as building complexes. Both of these programs are investigating the turbulent mixing caused by building complexes and other urban obstacles.

Calhoun, R.J.; Chan, S.T.; Lee, R.L.

2000-05-18T23:59:59.000Z

252

Distribution of Energy Spectra, Reynolds Stresses, Turbulence Production, and Dissipation in a Tidally Driven Bottom Boundary Layer  

Science Conference Proceedings (OSTI)

Seven sets of 2D particle image velocimetry data obtained in the bottom boundary layer of the coastal ocean along the South Carolina and Georgia coast [at the South Atlantic Bight Synoptic Offshore Observational Network (SABSOON) site] are ...

L. Luznik; W. Zhu; R. Gurka; J. Katz; W. A. M. Nimmo Smith; T. R. Osborn

2007-06-01T23:59:59.000Z

253

Modeling the Benthic Boundary Layer  

Science Conference Proceedings (OSTI)

A second-order turbulence closure model is used to study the development of the benthic boundary layer. Results are presented on the effects of a time-dependent oscillatory forcing flow and an initially stably stratified density gradient. Using ...

K. J. Richards

1982-05-01T23:59:59.000Z

254

The Method of Boundary Perturbation,  

NLE Websites -- All DOE Office Websites (Extended Search)

Method of Boundary Perturbation, Method of Boundary Perturbation, and Its Application to Wakefield Calculationst Weiren Chou+ Advanced Photon Source Argonne National Laboratory 9700 S. Cass Ave. Argonne, IL 60439 USA Spring Meeting of The American Physical Society Division of Physics of Beams Washington, D.C. April 16-19, 1990 tWork supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract W-31-109-ENG-38. tPresent address: SSC Laboratory, Accelerator Division, MS-I046, 2550 Beckleymeade Ave., Dallas, TX 75237, USA. LS-/~ Boundary Perturbation, and Its Application to Wakefield Calculations ABSTRACT The boundary perturbation method, suggested by Zhang and, independently, by Chatard-Moulin, Cooper, and their colleagues, is employed to the wakefield cal-

255

Grain-boundaries and Triple Junctions  

Science Conference Proceedings (OSTI)

Mar 14, 2012 ... For each tilt angle, the perfect boundary is created, as well as one containing a ... The stimulation of migration of general boundary by GBS is ...

256

Investigating Grain Boundary Structure-Kinetic Property ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Grain boundary energy landscapes contain all the information that is required to describe the kinetic behavior of grain boundaries (GBs).

257

Grain boundary segregation of carbon in iron  

Science Conference Proceedings (OSTI)

Excess carbon was present near grain boundaries in specimens equilibrated at ... the amount of carbon near the grain boundaries was found to decrease as the

258

Network topology analysis.  

SciTech Connect

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

Kalb, Jeffrey L.; Lee, David S.

2008-01-01T23:59:59.000Z

259

Effective algorithms and protocols for wireless networking: a topological approach  

E-Print Network (OSTI)

Much research has been done on wireless sensor networks. However, most protocols and algorithms for such networks are based on the ideal model Unit Disk Graph (UDG) model or do not assume any model. Furthermore, many results assume the knowledge of location information of the network. In practice, sensor networks often deviate from the UDG model significantly. It is not uncommon to observe stable long links that are more than five times longer than unstable short links in real wireless networks. A more general network model, the quasi unit-disk graph (quasi-UDG) model, captures much better the characteristics of wireless networks. However, the understanding of the properties of general quasi-UDGs has been very limited, which is impeding the design of key network protocols and algorithms. In this dissertation we study the properties for general wireless sensor networks and develop new topological/geometrical techniques for wireless sensor networking. We assume neither the ideal UDG model nor the location information of the nodes. Instead we work on the more general quasi-UDG model and focus on figuring out the relationship between the geometrical properties and the topological properties of wireless sensor networks. Based on such relationships we develop algorithms that can compute useful substructures (planar subnetworks, boundaries, etc.). We also present direct applications of the properties and substructures we constructed including routing, data storage, topology discovery, etc. We prove that wireless networks based on quasi-UDG model exhibit nice properties like separabilities, existences of constant stretch backbones, etc. We develop efficient algorithms that can obtain relatively dense planar subnetworks for wireless sensor networks. We also present efficient routing protocols and balanced data storage scheme that supports ranged queries. We present algorithmic results that can also be applied to other fields (e.g., information management). Based on divide and conquer and improved color coding technique, we develop algorithms for path, matching and packing problem that significantly improve previous best algorithms. We prove that it is unlikely for certain problems in operation science and information management to have any relatively effective algorithm or approximation algorithm for them.

Zhang, Fenghui

2008-08-01T23:59:59.000Z

260

Network Cabling Handbook  

Science Conference Proceedings (OSTI)

From the Publisher:This is a one-stop guide to both copper and fiber network cabling. Contains detailed coverage of monitoring software,connectivity troubleshooting,and management techniques. Master the art of wiring your network Plan,design,and build ...

Chris Clark

2001-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "boundaries network design" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Attacking the Kad network  

Science Conference Proceedings (OSTI)

The Kad network, an implementation of the Kademlia DHT protocol, supports the popular eDonkey peer-to-peer file sharing network and has over 1 million concurrent nodes. We describe several attacks that exploit critical design weaknesses in Kad to allow ... Keywords: Kad, P2P, attack, security

Peng Wang; James Tyra; Eric Chan-Tin; Tyson Malchow; Denis Foo Kune; Nicholas Hopper; Yongdae Kim

2008-09-01T23:59:59.000Z

262

Bayesian networks  

E-Print Network (OSTI)

g causal independence in Bayesian network inference. Journalworld ap- plications of Bayesian networks. Communications ofJensen. An Introduction to Bayesian Networks. Springer, New

Judea Pearl

2011-01-01T23:59:59.000Z

263

Design, development, and performance evaluation of a low-cost, low-power wake-up radio system for wireless sensor networks  

Science Conference Proceedings (OSTI)

Energy-efficient operation is a challenge for wireless sensor networks (WSNs). A common method employed for this purpose is duty-cycled operation, which extends battery lifetime yet incurs several types of energy wastes and challenges. A promising alternative ... Keywords: Wireless sensor networks, asynchronous, low-power, wake-up receiver

Joaquim Oller, Ilker Demirkol, Jordi Casademont, Josep Paradells

2013-11-01T23:59:59.000Z

264

Robust Network Design - Optimization Online  

E-Print Network (OSTI)

Aug 31, 2011 ... energy supply, and telecommunications. Doing it carefully with respect to ...... Issue on Green Communications, 8:181–2000, 2011. [41] M. Iri.

265

On optical communications networks and wideband network architecture  

Science Conference Proceedings (OSTI)

The optical networks of today are just beginning to realize their abilities to carry a tremendous amount of information in the forms of voice, data and video signals on a single optical fiber. However, many challenges lay ahead as designers and system ... Keywords: Optical networks, Wave division multiplexing and optical switching, Wideband network architecture

K Makki; J Broussard; N Pissinou

2000-05-01T23:59:59.000Z

266

Sleep scheduling for wireless sensor networks via network flow model  

Science Conference Proceedings (OSTI)

The pervasiveness and operational autonomy of mesh-based wireless sensor networks (WSNs) make them an ideal candidate in offering sustained monitoring functions at reasonable cost over a wide area. There has been a general consensus within the research ... Keywords: Cross-layer design, Integer linear programming, Network flow model, Sleep scheduling, Wireless sensor networks

Rick W. Ha; Pin-Han Ho; X. Sherman Shen; Junshan Zhang

2006-08-01T23:59:59.000Z

267

Nonconforming cell boundary element methods for elliptic problems on triangular mesh  

Science Conference Proceedings (OSTI)

The nonconforming cell boundary element (CBE) methods are proposed. The methods are designed in such a way that they enjoy the mass conservation at the element level and the normal component of fluxes at inter-element boundaries are continuous for unstructured ... Keywords: Multiscale method, 65N12, 65N30, Cell boundary element method, Finite volume, Flux conservation, Mixed finite element, Nonconforming finite element

Youngmok Jeon; Eun-Jae Park

2008-06-01T23:59:59.000Z

268

G-networks with synchronised arrivals  

Science Conference Proceedings (OSTI)

We consider G-networks in which customers arrive simultaneously in several queues. We denote this new signal as synchronised arrivals. Under some conditions on the arrivals on the boundary of the state space, and the ergodicity condition, we prove that ... Keywords: G-networks, Product form, Quasi-reversibility, Synchronised arrivals

Thu-Ha Dao-Thi; J. M. Fourneau; Minh-Anh Tran

2011-04-01T23:59:59.000Z

269

Boundary geometric control of a counter-current heat exchanger  

E-Print Network (OSTI)

Boundary geometric control of a counter-current heat exchanger Ahmed MAIDIa , Moussa DIAFb , Jean control of a counter-current heat exchanger whose control is designed considering a model based on two. The objective consists in controlling the internal fluid temperature, at the heat exchanger outlet

270

Mobility Modeling for Personal Networks  

Science Conference Proceedings (OSTI)

A Personal Network (PN) is a user-centric design interconnecting numerous devices belonging to a user in different geographic locations, such as home, office, car, etc., to form a single global network to offer fully personalized services. In PNs devices ... Keywords: Mobility model, PN clustering protocol, PN mobility model, Personal Networks, Stability analysis

Yanying Gu; R. Venkatesha Prasad; Ignas Niemegeers

2011-05-01T23:59:59.000Z

271

Body Area Networks: A Survey  

Science Conference Proceedings (OSTI)

Advances in wireless communication technologies, such as wearable and implantable biosensors, along with recent developments in the embedded computing area are enabling the design, development, and implementation of body area networks. This class of ... Keywords: body area networks, survey, wireless sensor networks

Min Chen; Sergio Gonzalez; Athanasios Vasilakos; Huasong Cao; Victor C. Leung

2011-04-01T23:59:59.000Z

272

Observations of the Evolution of the Nocturnal and Convective Boundary Layers and the Structure of Open-Celled Convection on 14 June 2002  

Science Conference Proceedings (OSTI)

The Boundary Layer Evolution (BLE) missions of the International H2O Project (IHOP_2002) were designed to provide comprehensive observations of the distribution of water vapor in the quiescent boundary layer and its evolution during the early ...

Lindsay J. Bennett; Tammy M. Weckwerth; Alan M. Blyth; Bart Geerts; Qun Miao; Yvette P. Richardson

2010-07-01T23:59:59.000Z

273

Modeling open boundaries in dissipative MHD simulation  

Science Conference Proceedings (OSTI)

The truncation of large physical domains to concentrate computational resources is necessary or desirable in simulating many natural and man-made plasma phenomena. Three open boundary condition (BC) methods for such domain truncation of dissipative magnetohydrodynamics ... Keywords: Approximate Riemann, Artificial boundary, Calderon method, Dissipative, Lacuna, Lacunae, MHD, Magnetohydrodynamics, Non-reflecting boundary, Nonlinear, Open boundary, hyperbolic-parabolic

E. T. Meier; A. H. Glasser; V. S. Lukin; U. Shumlak

2012-04-01T23:59:59.000Z

274

A study on SDH/OTN integrated network management method  

Science Conference Proceedings (OSTI)

An efficient management method for the Optical Transport Network (OTN) and Synchronous Digital Hierarchy (SDH) integrated network is described. We propose layer boundary section by focusing on the connection terminal point function on the OTN layer and, ... Keywords: OTN, SDH, integrated management, overlay-network

Kei Karato; Shun Yamamoto; Tomoyoshi Kataoka; Yukihide Yana; Yuzo Fujita

2009-09-01T23:59:59.000Z

275

Battery Allocation for Maximizing Lifetime of Wireless Sensor Networks.  

E-Print Network (OSTI)

??Wireless sensor network has been an area of interest among researchers. Designing a wireless sensor network involves multiple issues such as size and processing capacity… (more)

Khambete, Ketki

2010-01-01T23:59:59.000Z

276

Quantum networks modelled by graphs  

Science Conference Proceedings (OSTI)

Quantum networks are often modelled using Schrödinger operators on metric graphs. To give meaning to such models one has to know how to interpret the boundary conditions which match the wave functions at the graph vertices. In this article we give a survey

Pavel Exner; Olaf Post

2008-01-01T23:59:59.000Z