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1

2012 SG Peer Review - Wide Area Wireless Distribution Grid Sensor...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Technical Scope Develop and demonstrate a wireless network solution for distribution automation, including fault circuit indicators and transformer monitoring, capable of secure...

2

2012 SG Peer Review - Wide Area Wireless Distribution Grid Sensor & Faulted Circuit Indicator System for Underground Assets - Jason Wilson, On-Ramp Wireless  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wide Area Wireless Distribution Grid Sensor Wide Area Wireless Distribution Grid Sensor for Underground Assets Jason Wilson On-Ramp Wireless June 7, 2012 December 2008 Wide Area Wireless Distribution Grid Sensor for Underground Assets Objective Life-cycle Funding Summary ($K) Prior to FY 12 FY12, authorized FY13, requested Out-year(s) $1,046 $580 $39 $0 Technical Scope Develop and demonstrate a wireless network solution for distribution automation, including fault circuit indicators and transformer monitoring, capable of secure and reliable communication with below ground and hard to reach utility assets at a TCO that is commercially viable for utilities to deploy at large scale. Enable utilities throughout the US to improve critical grid reliability metrics including SAIDI. * Conceptual design and trade studies including sensor system interfaces, augmenting FCI with

3

QuRiNet: A Wide-Area Wireless Mesh Testbed for Research and Experimental Evaluations  

E-Print Network (OSTI)

in QuRiNet are powered by solar panels, running with multiple radios. QuRiNet provides the backbone in Figure 1. All nodes, except the gateway nodes, use solar power due to the lack of connectivity as a commu- nity rooftop wireless mesh network [2]. This network has to compete with home wireless networks

California at Davis, University of

4

A survey on wireless body area networks  

Science Conference Proceedings (OSTI)

The increasing use of wireless networks and the constant miniaturization of electrical devices has empowered the development of Wireless Body Area Networks (WBANs). In these networks various sensors are attached on clothing or on the body or even implanted ... Keywords: MAC, Routing, Wireless body area networks

Benoît Latré; Bart Braem; Ingrid Moerman; Chris Blondia; Piet Demeester

2011-01-01T23:59:59.000Z

5

Technology Challenges in the Development of Wireless Personal Area Networks  

Science Conference Proceedings (OSTI)

Wireless personal area networks (WPANs) will be major components of the heterogeneous communication environment of the future. The devices in a WPAN must be low cost and operate for a long time from a battery. As a consequence, they pose demanding ... Keywords: 4G networks, packaging technology, processing technology, wireless personal area networks

Marc Engels

2002-08-01T23:59:59.000Z

6

Self-Configuration for Wireless Local Area Networks  

Science Conference Proceedings (OSTI)

This paper concentrates on self-configuration in wireless local area networks (WLANs). As the growth of the stringent demand of heterogeneity and re-configurability in future wireless networks, the initial configuration is getting more and more complex, ... Keywords: Analytic hierarchy process, Grey relational analysis, Neighboring AP discovery, Self-configuration

Zhiyong Feng; Qixun Zhang; Dian Fan; Litao Liang; Ping Zhang

2010-03-01T23:59:59.000Z

7

A Generic Framework for Cross-Layer Optimisation in Wireless Personal Area Networks  

Science Conference Proceedings (OSTI)

Wireless Personal Area Networking (WPAN) is introduced as a new concept for next generation wireless systems. WPANs are short-range wireless systems operating in the direct surrounding of the user. A reference architecture for short-range wireless communications ... Keywords: cross-layer optimisation, wireless personal area networks

Carl Wijting; Ramjee Prasad

2004-04-01T23:59:59.000Z

8

Synchronous Ultra-Wide Band Wireless Sensors Networks for oil and gas exploration  

E-Print Network (OSTI)

Synchronous Ultra-Wide Band Wireless Sensors Networks for oil and gas exploration Stefano Savazzi1 of new oil and gas reservoir. Seismic exploration requires a large number (500 ÷ 2000 nodes, MAC and network layer to develop wireless sensors networks tailored for oil (and gas) exploration

Savazzi, Stefano

9

Traffic flow wide-area surveillance system definition  

SciTech Connect

Traffic Flow Wide-Area Surveillance (TFWAS) is a system for assessing the state of traffic flow over a wide area for enhanced traffic control and improved traffic management and planning. The primary purpose of a TFWAS system is to provide a detailed traffic flow description and context description to sophisticated traffic management and control systems being developed or envisioned for the future. A successful TFWAS system must possess the attributes of safety, reconfigurability, reliability, and expandability. The primary safety premise of TFWAS is to ensure that no action or failure of the TFWAS system or its components can result in risk of injury to humans. A wide variety of communication techniques is available for use with TFWAS systems. These communication techniques can be broken down into two categories, landlines and wireless. Currently used and possible future traffic sensing technologies have been examined. Important criteria for selecting TFWAS sensors include sensor capabilities, costs, operational constraints, sensor compatibility with the infrastructure, and extent. TFWAS is a concept that can take advantage of the strengths of different traffic sensing technologies, can readily adapt to newly developed technologies, and can grow with the development of new traffic control strategies. By developing innovative algorithms that will take information from a variety of sensor types and develop descriptions of traffic flows over a wide area, a more comprehensive understanding of the traffic state can be provided to the control system to perform the most reasonable control actions over the entire wide area. The capability of characterizing the state of traffic over an entire region should revolutionize developments in traffic control strategies.

Allgood, G.O.; Ferrell, R.K.; Kercel, S.W.; Abston, R.A.; Carnal, C.L. [Oak Ridge National Lab., TN (United States); Moynihan, P.I. [Jet Propulsion Lab., Pasadena, CA (United States)

1994-11-01T23:59:59.000Z

10

Industrial Wireless Sensors: A User's Perspective on the Impact of Standards on Wide-spread Deployment  

Science Conference Proceedings (OSTI)

The role of wireless sensing technologies in industrial instrumentation will undoubtedly become more important in the years ahead. . Deployment of such instrumentation in an industrial setting with its heightened security and robustness criteria hinges on user acceptance of verified performance as well as meeting cost requirements. Today, industrial users face many choices when specifying a wireless sensor network, including radio performance, battery life, interoperability, security, and standards compliance. The potential market for industrial wireless sensors is literally millions of wireless instruments and it is imperative that accurate information for applying the technology to real-world applications be available to the end-user so that they can make informed deployment decisions. The majority of industrial wireless automation designs now being deployed or being considered for deployment are based on three different standards . The HART Communications Foundation s WirelessHART (IEC 62591), the International Society of Automation s ISA100.11a, and the offering from the Industrial Wireless Alliance of China known as WIA-PA (IEC 62601). Aside from these industrial automation standards, users must also be cognizant of the underlying wireless network standards IEEE 802.11, IEEE 802.15.4, and IEEE 802.15.3a and their interactions with the three principal industrial automation protocols mentioned previously. The crucial questions being asked by end users revolve around sensor network performance, interoperability, reliability, and security. This paper will discuss potential wireless sensor applications in power plants, barriers to the acceptance of wireless technology, concerns related to standards, and provide an end user prospective on the issues affecting wide-spread deployment of wireless sensors. Finally, the authors conclude with a discussion of a recommended path forward including how standards organizations can better facilitate end user decision making and how end users can locate and use objective information for decision making.

Taft, Cyrus W. [Taft Engineering, Inc.; Manges, Wayne W [ORNL; Sorge, John N [Southern Company Services, Inc.

2012-01-01T23:59:59.000Z

11

DFAS Wide-Area Workflow Issues  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DFAS Wide-Area Workflow DFAS Wide-Area Workflow Issues Mark Shvartzman Sr. Project Manager, CEM, CEA Southern California Edison Presented at the Spring FUPWG Meeting April 20, 2011 What We Are Going to Discuss * Review Delivery Order or Task Order for accounting lines information. * Contact Contracting Officer or Contracting specialist and request Pay DoDAAC and Ext. information * Create Payment Log by ACRN * Start creating Invoice How the WAWF works and how to navigate through: 2 CONTRACT N68711-03-G-4019 DO#0028 Pay Records Bill by CLIN Award $ by CLIN Billed To Date Invoice number Pay Total Balance by CLIN 7500009733 $330,899.11 CLIN 0001AA 674,220.00 674,220.00 7500009733 7500012596 674,220.00 0.00 7500012596 $641,344.69 CLIN 0001AB 325,780.00 298023.8 27,756.20 7500012596 7500015079 325,780.00

12

TCP performance analysis for wide area networks  

SciTech Connect

Even though networks have been getting faster, perceived throughput at the application level has not increased accordingly. In an attempt to identify many of the performance bottlenecks, we collected and analyzed data over a wide area network (WAN) at T3 (45 Mbps) bandwidth. The information gained will assist in designing new protocols and/or algorithms that are consistent with future high- speed requirements.

Chen, H.Y.; Hutchins, J.A. [Sandia National Labs., Livermore, CA (United States); Testi, N. [Sandia National Labs., Albuquerque, NM (United States)

1993-08-01T23:59:59.000Z

13

Wide Area and Distributed Hydrogen Sensors  

DOE Green Energy (OSTI)

Recent advances in optical sensors show promise for the development of new wide area monitoring and distributed optical network hydrogen detection systems. Optical hydrogen sensing technologies reviewed here are: 1) open path Raman scattering systems, 2) back scattering from chemically treated solid polymer matrix optical fiber sensor cladding; and 3) shlieren and shearing interferometry imaging. Ultrasonic sensors for hydrogen release detection are also reviewed. The development status of these technologies and their demonstrated results in sensor path length, low hydrogen concentration detection ability, and response times are described and compared to the corresponding status of hydrogen spot sensor network technologies.

Zalosh, Robert G.; Barilo, Nick F.

2009-09-18T23:59:59.000Z

14

Implications of Wide-Area Geographic Diversity for Short- Term...  

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

Implications of Wide-Area Geographic Diversity for Short- Term Variability of Solar Power Title Implications of Wide-Area Geographic Diversity for Short- Term Variability of Solar...

15

Energy comparison and optimization of wireless body-area network technologies  

Science Conference Proceedings (OSTI)

Wireless body-area networks (WBANs) have revolutionized the way mobile and wearable computers communicate with their users and I/O devices. We investigate an energy-efficient wireless device driver for low-duty peripherals, sensors and other I/O devices ... Keywords: energy-efficient design, power consumption, wireless body-area network

Le Yan; Lin Zhong; Niraj K. Jha

2007-06-01T23:59:59.000Z

16

Adapting Cognitive Radio Technology for Low-Power Wireless Personal Area Network Devices  

Science Conference Proceedings (OSTI)

The application of wireless personal area network (WPAN) and simple point-to-point wireless communication devices has increased drastically both in private household and in our workspaces in general over the last decade. Combined with the fact that the ... Keywords: Cognitive radio, Dynamic spectrum access, Low-power, Medium access control, RFIC, Transceiver architecture, Wireless personal area network

John Rohde; Thomas Skjødeberg Toftegaard

2011-05-01T23:59:59.000Z

17

Definition: Wide Area | Open Energy Information  

Open Energy Info (EERE)

Related Terms Reliability Coordinator Area, Reliability Coordinator References Glossary of Terms Used in Reliability Standards An i LikeLike UnlikeLike You like this.Sign Up...

18

Flexible application driven network striping over Wireless Wide Area Networks  

E-Print Network (OSTI)

Inverse multiplexing, or network striping, allows the construction of a high-bandwidth virtual channel from a collection of multiple low-bandwidth network channels. Striping systems usually employ a packet scheduling policy ...

Qureshi, Asfandyar

2005-01-01T23:59:59.000Z

19

Definition: Wide Area Monitoring, Visualization, & Control | Open Energy  

Open Energy Info (EERE)

Wide Area Monitoring, Visualization, & Control Wide Area Monitoring, Visualization, & Control Jump to: navigation, search Dictionary.png Wide Area Monitoring, Visualization, & Control Wide area monitoring and visualization requires time synchronized sensors, communications, and information processing that make it possible for the condition of the bulk power system to be observed and understood in real-time so that protective, preventative, or corrective action can be taken.[1] Related Terms Wide area, bes emergency, sustainability, smart grid References ↑ SmartGrid.gov 'Description of Functions' An inl LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ine Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Wide_Area_Monitoring,_Visualization,_%26_Control&oldid=502579

20

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

Note: This page contains sample records for the topic "wide area wireless" 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

Energy-aware Gateway Selection for Increasing the Lifetime of Wireless Body Area Sensor Networks  

Science Conference Proceedings (OSTI)

A Wireless Body Area Sensor Network (WBASN) is composed of a set of sensor nodes, placed on, near or within a human body. WBASNs opt to continuously monitor the health conditions of individuals under medical risk, e.g., elders and chronically ill people, ... Keywords: Energy harvesting, Gateway selection algorithm, Network lifetime, Selective engagement of nodes, Wireless Body Area Sensor Networks (WBASN)

Cuneyt Bayilmis; Mohamed Younis

2012-06-01T23:59:59.000Z

22

A Study of Transport Protocols for Wide Area Scientific Applications  

SciTech Connect

This is the final project report of award "A Study of Transport Protocols for Wide Area Scientific Applications", given by DOE in 2003 to Vishal Misra at Columbia University.

Vishal Misra

2011-03-01T23:59:59.000Z

23

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

24

An Efficient Sound Source for Wide-Area RAFOS Navigation  

Science Conference Proceedings (OSTI)

To meet the expected need for wide-area acoustic navigation for Lagrangian studies of ocean circulation using RAFOS floats, a new and powerful sound source, a resonant pipe projector has been developed. It consists of a free-flooded open steel ...

T. Rossby; J. Ellis; D. C. Webb

1993-06-01T23:59:59.000Z

25

Distributed wide-area traffic management for cloud services  

Science Conference Proceedings (OSTI)

The performance of interactive cloud services depends heavily on which data centers handle client requests, and which wide-area paths carry traffic. While making these decisions, cloud service providers also need to weigh operational considerations like ... Keywords: joint optimization, multi-homed routing, request mapping

Srinivas Narayana; Joe Wenjie Jiang; Jennifer Rexford; Mung Chiang

2012-06-01T23:59:59.000Z

26

A MIMO-OFDM Testbed for Wireless Local Area Networks  

E-Print Network (OSTI)

this paper is to present the design steps leading to the demonstration of a software-radio testbed with multiple transmit (Tx) and receive (Rx) antennas, aiming at enhancing the performance of current WLAN standards. The expected benefits of multiple antennas are subject to the propagation conditions in wireless indoor local area transmissions. Therefore, the propagation environment must be carefully studied and analyzed before appropriate multipleantenna transmission techniques are devised and evaluated. In this regard, the scope of our work is larger than the typical prototyping e#orts in that the project resulted in the production of an entirely custom demonstrator by the various industrial partners, including the algorithmic studies, the hardware handling the baseband processing, the RF components, up to the antennas, and the working real-time implementation of the coding and decoding algorithms. In particular, the channel characterization e#ort and the corresponding algorithmic adaptations proposed in this work, are typically absent from smaller-scale prototyping projects. This characterization was done by measuring the channel parameters in the frequency band of interest and developing channel models as well as corresponding channel simulation capabilities in order to produce typical channel impulse responses for algorithms evaluation. Then, using this preliminary information on propagation characteristics, various multiantenna processing techniques have been studied and compared according to performance versus complexity criteria. Similarly, the design and use of custom RF components and antennas are often replaced by channel simulators. Another major point in the validation of the testbed performance concerns the careful comparisons and cross-validations between...

Albert Guillen; Albert Guillén I Fàbregas; Maxime Guillaud; Dirk T. M. Slock; Karine Gosse; Stéphanie Rouquette; Re Ribeiro Dias; Xavier Miet; Jean-marc Conrat; Yann Toutain; Alain Peden; Zaiqing Li

2006-01-01T23:59:59.000Z

27

Economic Impacts of a Wide Area Release of Anthrax  

SciTech Connect

This analysis explores economic impacts that might result from a wide-area release of anthrax. The intent is not to provide a quantitative analysis of such a disaster, but to: 1. Define the general categories of economic impacts that the region should be concerned about; and, 2. Explore what types of private sector businesses or industries, if any, may have the greatest impact on speeding the economic recovery of the region.

Judd, Kathleen S.; Olson, Jarrod; Stein, Steven L.; Lesperance, Ann M.

2009-05-29T23:59:59.000Z

28

Wide-area situation awareness in electric power grid  

Science Conference Proceedings (OSTI)

Two primary elements of the US energy policy are demand management and efficiency and renewable sources. Major objectives are clean energy transmission and integration, reliable energy transmission, and grid cyber security. Development of the Smart Grid seeks to achieve these goals by lowering energy costs for consumers, achieving energy independence and reducing greenhouse gas emissions. The Smart Grid is expected to enable real time wide-area situation awareness (SA) for operators. Requirements for wide-area SA have been identified among interoperability standards proposed by the Federal Energy Regulatory Commission and the National Institute of Standards and Technology to ensure smart-grid functionality. Wide-area SA and enhanced decision support and visualization tools are key elements in the transformation to the Smart Grid. This paper discusses human factors research to promote SA in the electric power grid and the Smart Grid. Topics that will be discussed include the role of human factors in meeting US energy policy goals, the impact and challenges for Smart Grid development, and cyber security challenges.

Greitzer, Frank L.

2010-04-28T23:59:59.000Z

29

Development of Autonomous Magnetometer Rotorcraft For Wide Area Assessment  

SciTech Connect

Large areas across the United States and internationally are potentially contaminated with unexploded ordinance (UXO), with some ranges encompassing tens to hundreds of thousands of acres. Technologies are needed which will allow for cost effective wide area scanning with (1) near 100% coverage and (2) near 100% detection of subsurface ordnance or features indicative of subsurface ordnance. The current approach to wide area assessment is a multi-level one, in which medium - altitude fixed wing optical imaging is used for an initial site assessment. This assessment is followed with low altitude manned helicopter based magnetometry. Subsequent to this wide area assessment targeted surface investigations are performed using either towed geophysical sensor arrays or man portable sensors. In order to be an effective tool for small UXO detection, the sensing altitude for magnetic site investigations needs to be on the order of 1 to 3 meters. These altitude requirements mean that manned helicopter surveys will generally only be feasible in large, open and relatively flat terrains. While such surveys are effective in mapping large areas relatively fast there are substantial mobilization/demobilization, staffing and equipment costs associated with these surveys, resulting in costs of approximately $100-$150/acre. In addition, due to the low altitude there are substantial risks to pilots and equipment. Surface towed arrays provide highresolution maps but have other limitations, e.g. in their ability to navigate rough terrain effectively. Thus there is a need for other systems, which can be used for effective data collection. An Unmanned Aerial Vehicle (UAV) magnetometer platform is an obvious alternative. The motivation behind such a system is that it reduces risk to operators, is lower in initial and Operational and Maintenance (O&M) costs (and can thus potentially be applied to smaller sites) and has the potential of being more effective in terms of detection and possibly characterization (through the use of dynamic acquisition, i.e. survey mission in-flight reprioritization).

Mark D. McKay; Matthew O. Anderson

2011-08-01T23:59:59.000Z

30

Substation-Wide Monitoring Through Applications of Networked Wireless Sensor Devices  

Science Conference Proceedings (OSTI)

This report presents the work performed by researchers at the University of North Carolina at Charlotte on an EPRI-sponsored project involving the development of a wireless sensor network for substation monitoring. Wireless sensor networking is an emerging technology, and its application to substation monitoring has substantial economic as well as functional benefits. This report describes the challenges faced, technologies used, design strategies developed, and lessons learned from the various experimen...

2007-12-21T23:59:59.000Z

31

A MIMO-OFDM Testbed for Wireless Local Area Networks  

E-Print Network (OSTI)

This paper describes the design steps and final implementation of a MIMO OFDM prototype platform developed to enhance the performance of wireless LAN standards such as HiperLAN/2 and 802.11, using multiple transmit and multiple receive antennas. We present the design methodology, including cross-validation of the Matlab, C++ and VHDL components, and the final demonstrator architecture. We highlight the increased measured performance of the MIMO testbed over the singleantenna system.

Albert Guillen i F abregas; Maxime Guillaud; Giuseppe Caire; Karine Gosse; Stephanie Rouquette; Alexandre Ribeiro Dias; Philippe Bernardin; Re Ribeiro Dias; Xavier Miet; Jean-Marc Conrat; et aal.; Yann Toutain; Alain Peden; Zaiqing Li

2005-01-01T23:59:59.000Z

32

Making sensor networks immortal: an energy-renewal approach with wireless power transfer  

Science Conference Proceedings (OSTI)

Wireless sensor networks are constrained by limited battery energy. Thus, finite network lifetime is widely regarded as a fundamental performance bottleneck. Recent breakthrough in the area of wireless power transfer offers the potential of removing ... Keywords: lifetime, optimization, wireless power transfer, wireless sensor network (WSN)

Liguang Xie; Yi Shi; Y. Thomas Hou; Hanif D. Sherali

2012-12-01T23:59:59.000Z

33

Measurements and models of wide area TCP conversations  

SciTech Connect

This paper describes measurements of all the wide area network TCP conversations between the Lawrence Berkeley Laboratory (LBL) and the rest of the world for the months of November, 1990, and March, 1991. Some 500,000 conversations were recorded, encompassing 11 different major protocols. We look at aggregate characteristics of these conversations, both overall and by TCP protocol (e.g., smtp, ftp), computing the distributions of amount of data transferred, network bandwidth used, conversion lifetimes and conversation interarrival times. Temporal traffic variation is also investigated, showing the variation of number of active conversations and network bandwidth utilization over periods of 24 hours, 7 days and 30 days. Long term variation is also investigated by separately analyzing November and March data (which reveals a 10--20% increase in almost all aggregate traffic characteristics in just four months). We classify each conversation geographically and discover that the connectivity of the conversations were remarkably rich, including traffic to 48 of the 50 states in the US and 23 foreign countries. Finally, we develop a number of models for describing conversations of the various protocols. From these models we can more readily assess how each protocol is used and how the use changes as network utilization grows.

Paxson, V.

1991-05-01T23:59:59.000Z

34

Wireless Sensing, Monitoring and Optimization for Campus-Wide Steam Distribution  

Science Conference Proceedings (OSTI)

The US Congress has passed legislation dictating that all government agencies establish a plan and process for improving energy efficiencies at their sites. In response to this legislation, Oak Ridge National Laboratory (ORNL) has recently conducted a pilot study to explore the deployment of a wireless sensor system for a real-time measurement-based energy efficiency optimization. With particular focus on the 12-mile long steam distribution network in our campus, we propose an integrated system-level approach to optimize energy delivery within the steam distribution system. Our approach leverages an integrated wireless sensor and real-time monitoring capability. We make real time state assessment on the steam trap health and steam flow estimate of the distribution system by mounting acoustic sensors on the steam pipes/traps/valves and observing measurements of these sensors with state estimators for system health. Our assessments are based on a spectral-based energy signature scheme that interprets acoustic vibration sensor data to estimate steam flow rates and assess steam traps status. Experimental results show that the energy signature scheme has the potential to identify different steam trap states and it has sufficient sensitivity to estimate flow rate. Moreover, results indicate a nearly quadratic relationship over the test region between the overall energy signature factor and flow rate in the pipe. We are able to present the steam flow and steam trap status, sensor readings, and the assessed alerts as an interactive overlay within a web-based Google Earth geographic platform that enables decision makers to take remedial action. The goal is to achieve significant energy-saving in steam lines by monitoring and acting on leaking steam pipes/traps/valves. We believe our demonstration serves as an instantiation of a platform that extends implementation to include newer modalities to manage water flow, sewage and energy consumption.

Olama, Mohammed M [ORNL; Allgood, Glenn O [ORNL; Kuruganti, Phani Teja [ORNL; Sukumar, Sreenivas R [ORNL; Woodworth, Ken [ORNL; Lake, Joe E [ORNL

2011-11-01T23:59:59.000Z

35

Making every bit count in wide-area analytics  

Science Conference Proceedings (OSTI)

Many data sets, such as system logs, are generated from widely distributed locations. Current distributed systems often discard this data because they lack the ability to backhaul it efficiently, or to do anything meaningful with it at the distributed ...

Ariel Rabkin, Matvey Arye, Siddhartha Sen, Vivek Pai, Michael J. Freedman

2013-05-01T23:59:59.000Z

36

Wide-area, real-time monitoring and visualization system  

SciTech Connect

A real-time performance monitoring system for monitoring an electric power grid. The electric power grid has a plurality of grid portions, each grid portion corresponding to one of a plurality of control areas. The real-time performance monitoring system includes a monitor computer for monitoring at least one of reliability metrics, generation metrics, transmission metrics, suppliers metrics, grid infrastructure security metrics, and markets metrics for the electric power grid. The data for metrics being monitored by the monitor computer are stored in a data base, and a visualization of the metrics is displayed on at least one display computer having a monitor. The at least one display computer in one said control area enables an operator to monitor the grid portion corresponding to a different said control area.

Budhraja, Vikram S. (Los Angeles, CA); Dyer, James D. (La Mirada, CA); Martinez Morales, Carlos A. (Upland, CA)

2011-11-15T23:59:59.000Z

37

Wide-area, real-time monitoring and visualization system  

DOE Patents (OSTI)

A real-time performance monitoring system for monitoring an electric power grid. The electric power grid has a plurality of grid portions, each grid portion corresponding to one of a plurality of control areas. The real-time performance monitoring system includes a monitor computer for monitoring at least one of reliability metrics, generation metrics, transmission metrics, suppliers metrics, grid infrastructure security metrics, and markets metrics for the electric power grid. The data for metrics being monitored by the monitor computer are stored in a data base, and a visualization of the metrics is displayed on at least one display computer having a monitor. The at least one display computer in one said control area enables an operator to monitor the grid portion corresponding to a different said control area.

Budhraja, Vikram S.; Dyer, James D.; Martinez Morales, Carlos A.

2013-03-19T23:59:59.000Z

38

Wide-Area Thermal Processing of Light-Emitting Materials  

Science Conference Proceedings (OSTI)

Silicon carbide based materials and devices have been successfully exploited for diverse electronic applications. However, they have not achieved the same success as Si technologies due to higher material cost and higher processing temperatures required for device development. Traditionally, SiC is not considered for optoelectronic applications because it has an indirect bandgap. However, AppliCote Associates, LLC has developed a laser-based doping process which enables light emission in SiC through the creation of embedded p-n junctions. AppliCote laser irradiation of silicon carbide allows two different interaction mechanisms: (1) Laser conversion or induced phase transformation which creates carbon rich regions that have conductive properties. These conductive regions are required for interconnection to the light emitting semiconducting region. (2) Laser doping which injects external dopant atoms into the substrate that introduces deep level transition states that emit light when electrically excited. The current collaboration with AppliCote has focused on the evaluation of ORNL's unique Pulse Thermal Processing (PTP) technique as a replacement for laser processing. Compared to laser processing, Pulse Thermal Processing can deliver similar energy intensities (20-50 kW/cm2) over a much larger area (up to 1,000 cm2) at a lower cost and much higher throughput. The main findings of our investigation; which are significant for the realization of SiC based optoelectronic devices, are as follows: (1) The PTP technique is effective in low thermal budget activation of dopants in SiC similar to the laser technique. The surface electrical conductivity of the SiC samples improved by about three orders of magnitude as a result of PTP processing which is significant for charge injection in the devices; (2) The surface composition of the SiC film can be modified by the PTP technique to create a carbon-rich surface (increased local C:Si ratio from 1:1 to 2.9:1). This is significant as higher thermal and electrical conductivities of the surface layer are critical for a successful development of integrated optoelectronic devices; and (3) PTP provides low thermal budget dopant activation with a controlled depth profile, which can be exploited for high performance device development with selective patterning of the substrate. This project has successfully demonstrated that a low thermal budget annealing technique, such as PTP, is critical to defining the path for low cost electronic devices integrated on glass or polymeric substrates. This project is complimentary to the goals of the Solid State Lighting Program within DOE. It involves new manufacturing techniques for light emitting materials that are potentially much lower cost and energy efficient than existing products. Significant opportunity exists for further exploration of AppliCote's material and device technology in combination with ORNL's PTP technique, modeling, and characterization capabilities.

Duty, C.; Quick, N. (AppliCote Associates, LLC)

2011-09-30T23:59:59.000Z

39

Automatic planning tool for deployment of indoor wireless local area networks  

Science Conference Proceedings (OSTI)

This paper presents an automatic planning software tool for indoor wireless networks. As a consequence of increasing number of wireless interface based systems, automation of deployments becomes actually relevant. There are a lot of parameters that influences ... Keywords: algorithms, network planning, wireless LAN

Mariano Molina García; Alfonso Fernandez-Durán; José I. Alonso

2009-06-01T23:59:59.000Z

40

Improving monitoring, control and protection of power grid using wide area synchro-phasor measurements  

Science Conference Proceedings (OSTI)

When disturbances occur in power grid, monitoring, control and protection systems are required to stop the grid degradation, restore it to a normal state, and hence minimize their effects. However, in wide area power grid resulting from large extension ... Keywords: emergency control and optimization systems, phasor measurement units, power system, wide area protection system

Hamid Bentarzi

2010-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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

A frequency monitoring system development for wide-area power grid protection  

Science Conference Proceedings (OSTI)

There have been recent research activities on GPS-based FNET to prevent wide-area blackouts by monitoring frequency deviation. This paper introduces a system for monitoring regional frequencies in power grid developed as an advanced research project ... Keywords: Frequency monitoring, Power grid protection, Wide-area power grid

Yoon Sang Kim; Junho Ko; Dong-Kwang Shin; Chul-Hwan Kim; Chul-Won Park

2013-06-01T23:59:59.000Z

42

V -209:Cisco WAAS (Wide Area Application Services) Arbitrary Code Execution  

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

V -209:Cisco WAAS (Wide Area Application Services) Arbitrary Code V -209:Cisco WAAS (Wide Area Application Services) Arbitrary Code Execution Vulnerabilities V -209:Cisco WAAS (Wide Area Application Services) Arbitrary Code Execution Vulnerabilities August 2, 2013 - 2:25am Addthis PROBLEM: Two vulnerabilities have been reported in Cisco WAAS (Wide Area Application Services), which can be exploited by malicious users and malicious people to compromise a vulnerable system. PLATFORM: Versions 5.0.x, 5.1.x, and 5.2.x. ABSTRACT: Cisco Wide Area Application Services (WAAS) when configured as Central Manager (CM), contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on the affected system. REFERENCE LINKS: Secunia Advisory SA54372 CVE-2013-3443 CVE-2013-3444 IMPACT ASSESSMENT: High

43

Using wireless technologies in healthcare  

Science Conference Proceedings (OSTI)

With an increasingly mobile society and the worldwide deployment of mobile and wireless networks, wireless infrastructure can support many current and emerging healthcare applications. However, before wireless infrastructure can be used in a wide scale, ... Keywords: ad hoc wireless networks, healthcare, intelligent emergency system, location management, mobile communications, mobile wireless networks, patient monitoring, telemedicine

Upkar Varshney

2006-02-01T23:59:59.000Z

44

MAC layer power management schemes for efficient energy- delay tradeoffs in wireless local area networks  

E-Print Network (OSTI)

power consumptions which are approximately standard for a specific devicepower consumption and thereby prolong the system lifetime of battery powered wireless devices,

Sarkar, Mahasweta

2006-01-01T23:59:59.000Z

45

Communication infrastructure planning for wide area measurement systems in power systems  

Science Conference Proceedings (OSTI)

Smart grid denotes integration of all elements connected to a power grid with a communication infrastructure. In modern power systems, wide area measurement systems WAMS are such systems that use communication infrastructure to share their data and information. ...

Mohammad Shahraeini; Mohammad Hossein Javidi; Mohammad Sadegh Ghazizadeh

2013-06-01T23:59:59.000Z

46

An evidential fusion architecture for people surveillance in wide open areas  

Science Conference Proceedings (OSTI)

A new evidential fusion architecture is proposed to build an hybrid artificial intelligent system for people surveillance in wide open areas. Authorized people and intruders are identified and localized thanks to the joint employment of cameras and RFID ...

M. Fornaciari; D. Sottara; A. Prati; P. Mello; R. Cucchiara

2011-05-01T23:59:59.000Z

47

Wireless Innovations as Enablers for Complex & Dynamic Artificial Systems  

Science Conference Proceedings (OSTI)

Scientific and technological innovations of the last few decades in the field of wireless telecommunications and networking have enabled a wide area of applications and services in healthcare, transportation, environmental protection, infotainment, industrial ... Keywords: Biology inspired, Cognitive network, Cognitive radio, Environmental risk management, ITS, Industrial automation, Intelligent city, MANET, MANET capacity, Middleware, Mobile sensor networks, Nanotechnology, Pervasive health, Physics inspired, Sensor network programming, Telematics, VANET, VSN, WSN, Wireless communications, Wireless networks

Spyridon Vassilaras; Gregory S. Yovanof

2010-05-01T23:59:59.000Z

48

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

49

A Six-Beam-Switched Array Antenna for 5.2 GHz High-Speed Wireless Local Area Networks  

Science Conference Proceedings (OSTI)

A six-beam-switched array antenna with a flat profile was designed for the application of high-speed wireless local-area networks in the range of 5–6 GHz. This six-beam-switched array antenna is composed of an analog beamformer and a microstrip-slot ... Keywords: beamformer, single-pole double-throw switch, slot antenna, switched-beam antenna

Sheng-Fuh Chang; Jia-Liang Chen; Chin-San Lin; Jing-Jang Luo

2001-04-01T23:59:59.000Z

50

Area temperature system monitoring and computing based on adaptive fuzzy logic in wireless sensor networks  

Science Conference Proceedings (OSTI)

The many subfields in the wireless sensor networking literature include data fusion, data aggregation, remote environmental monitoring, sensing (temperature, pressure speed) and various military applications. The distance between sensor nodes can be ... Keywords: Fuzzy logic, Monitoring, RSSI, Temperature, WSN

Ing-Jiunn Su; Chia-Chih Tsai; Wen-Tsai Sung

2012-05-01T23:59:59.000Z

51

Proximity breeds danger: emerging threats in metro-area wireless networks  

Science Conference Proceedings (OSTI)

The growing popularity of wireless networks and mobile devices is starting to attract unwanted attention especially as potential targets for malicious activities reach critical mass. In this study, we try to quantify the threat from large-scale distributed ...

P. Akritidis; W. Y. Chin; V. T. Lam; S. Sidiroglou; K. G. Anagnostakis

2007-08-01T23:59:59.000Z

52

The Evolution Towards Grids: Ten Years of High-Speed, Wide Area, Data Intensive Computing  

E-Print Network (OSTI)

1 The Evolution Towards Grids: Ten Years of High-Speed, Wide Area, Data Intensive Computing William aggregating and scheduling many resources. Data must be located and staged, cache and network capacity must and non-destructive imaging to supply real-time data to a remote, on-line, airframe structures expert who

53

A Self-Managing Wide-Area Data Streaming Service using Model-based Online Control  

E-Print Network (OSTI)

-latency robust data streaming between the corresponding distributed components. For example, a typical Grid-- Efficient and robust data streaming services are a critical requirement of emerging Grid applications, which for wide-area high-performance distributed computing. As Grid technologies and testbeds mature

Parashar, Manish

54

High-Performance Wide-Area Optical Tracking: The HiBall Tracking System  

Science Conference Proceedings (OSTI)

Since the early 1980s, the Tracker Project at the University of North Carolina at Chapel Hill has been working on wide-area head tracking for virtual and augmented environments. Our long-term goal has been to achieve the high performance required for ...

Greg Welch; Gary Bishop; Leandra Vicci; Stephen Brumback; Kurtis Keller; D'nardo Colucci

2001-02-01T23:59:59.000Z

55

Analysis of the Contention Access Phase of a Reservation MAC Protocol for Wide-Area Data  

E-Print Network (OSTI)

collisions are expensive in terms of latency and wasted bandwidth, (b) the load profiles which are triggeredAnalysis of the Contention Access Phase of a Reservation MAC Protocol for Wide-Area Data Intensive for MAC performance analysis [1], [2], [3], (c) the maximum propagation delay could be potentially very

Roy, Sumit

56

Comparative study of multicast authentication schemes with application to wide-area measurement system  

Science Conference Proceedings (OSTI)

Multicasting refers to the transmission of a message to multiple receivers at the same time. To enable authentication of sporadic multicast messages, a conventional digital signature scheme is appropriate. To enable authentication of a multicast data ... Keywords: multicast authentication, multiple-time signature scheme, smart grid, wide-area measurement system

Yee Wei Law, Zheng Gong, Tie Luo, Slaven Marusic, Marimuthu Palaniswami

2013-05-01T23:59:59.000Z

57

UDT: UDP-based data transfer for high-speed wide area networks  

Science Conference Proceedings (OSTI)

In this paper, we summarize our work on the UDT high performance data transport protocol over the past four years. UDT was designed to effectively utilize the rapidly emerging high-speed wide area optical networks. It is built on top of UDP with reliability ... Keywords: Congestion control, Design and implementation, High-speed networks, Transport protocol

Yunhong Gu; Robert L. Grossman

2007-05-01T23:59:59.000Z

58

The Wide-area Energy Management System Phase 2 Final Report  

DOE Green Energy (OSTI)

The higher penetration of intermittent generation resources (including wind and solar generation) in the Bonneville Power Administration (BPA) and California Independent System Operator (CAISO) balancing authorities (BAs) raises issue of requiring expensive additional fast grid balancing services in response to additional intermittency and fast up and down power ramps in the electric supply system. The overall goal of the wide-area energy management system (WAEMS) project is to develop the principles, algorithms, market integration rules, a functional design, and a technical specification for an energy storage system to help cope with unexpected rapid changes in renewable generation power output. The resulting system will store excess energy, control dispatchable load and distributed generation, and utilize inter-area exchange of the excess energy between the California ISO and Bonneville Power Administration control areas. A further goal is to provide a cost-benefit analysis and develop a business model for an investment-based practical deployment of such a system. There are two tasks in Phase 2 of the WAEMS project: the flywheel field tests and the battery evaluation. Two final reports, the Wide-area Energy Management System Phase 2 Flywheel Field Tests Final Report and the Wide-area Energy Storage and Management System Battery Storage Evaluation, were written to summarize the results of the two tasks.

Lu, Ning; Makarov, Yuri V.; Weimar, Mark R.

2010-08-31T23:59:59.000Z

59

Use of the WECC WAMS in Wide Area Probing Tests for Validation of System Performance & Modeling  

Science Conference Proceedings (OSTI)

During 2005 and 2006 the Western Electricity Coordinating Council (WECC) performed three major tests of western system dynamics. These tests used a Wide Area Measurement System (WAMS) based primarily on Phasor Measurement Units (PMUs) to determine response to events including the insertion of the 1400-MW Chief Joseph braking resistor, probing signals, and ambient events. Test security was reinforced through real-time analysis of wide area effects, and high-quality data provided dynamic profiles for interarea modes across the entire western interconnection. The tests established that low-level optimized pseudo-random ±20-MW probing with the Pacific DC Intertie (PDCI) roughly doubles the apparent noise that is natural to the power system, providing sharp dynamic information with negligible interference to system operations. Such probing is an effective alternative to use of the 1400-MW Chief Joseph dynamic brake, and it is under consideration as a standard means for assessing dynamic security.

Hauer, John F.; Mittelstadt, William; Martin, Kenneth E.; Burns, J. W.; Lee, Harry; Pierre, John W.; Trudnowski, Daniel

2009-02-01T23:59:59.000Z

60

The role of Wireless Sensor Networks in the area of Critical Information Infrastructure Protection  

Science Conference Proceedings (OSTI)

Critical Infrastructures, such as energy, banking, and transport, are an essential pillar to the well-being of the national and international economy, security and quality of life. These infrastructures are dependent on a spectrum of highly interconnected ... Keywords: Critical Information Infrastructure Protection, Network Security, Wireless Sensor Networks

Rodrigo Roman; Cristina Alcaraz; Javier Lopez

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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

Measuring air quality in city areas by vehicular wireless sensor networks  

Science Conference Proceedings (OSTI)

This paper considers a micro-climate monitoring scenario, which usually requires deploying a large number of sensor nodes to capture environmental information. By exploiting vehicular sensor networks (VSNs), it is possible to equip fewer nodes on cars ... Keywords: Micro-climate monitoring, Opportunistic communication, Pervasive computing, Vehicular sensor network, Wireless sensor network

Shu-Chiung Hu; You-Chiun Wang; Chiuan-Yu Huang; Yu-Chee Tseng

2011-11-01T23:59:59.000Z

62

A framework for activity detection in wide-area motion imagery  

Science Conference Proceedings (OSTI)

Wide-area persistent imaging systems are becoming increasingly cost effective and now large areas of the earth can be imaged at relatively high frame rates (1-2 fps). The efficient exploitation of the large geo-spatial-temporal datasets produced by these systems poses significant technical challenges for image and video analysis and data mining. In recent years there has been significant progress made on stabilization, moving object detection and tracking and automated systems now generate hundreds to thousands of vehicle tracks from raw data, with little human intervention. However, the tracking performance at this scale, is unreliable and average track length is much smaller than the average vehicle route. This is a limiting factor for applications which depend heavily on track identity, i.e. tracking vehicles from their points of origin to their final destination. In this paper we propose and investigate a framework for wide-area motion imagery (W AMI) exploitation that minimizes the dependence on track identity. In its current form this framework takes noisy, incomplete moving object detection tracks as input, and produces a small set of activities (e.g. multi-vehicle meetings) as output. The framework can be used to focus and direct human users and additional computation, and suggests a path towards high-level content extraction by learning from the human-in-the-loop.

Porter, Reid B [Los Alamos National Laboratory; Ruggiero, Christy E [Los Alamos National Laboratory; Morrison, Jack D [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

63

Survey and analysis of multimodal sensor planning and integration for wide area surveillance  

Science Conference Proceedings (OSTI)

Although sensor planning in computer vision has been a subject of research for over two decades, a vast majority of the research seems to concentrate on two particular applications in a rather limited context of laboratory and industrial workbenches, ... Keywords: Sensor planning, cooperative sensing, multimodal sensing, persistent surveillance, threat object recognition, ubiquitous surveillance, wireless sensor network

Besma R. Abidi; Nash R. Aragam; Yi Yao; Mongi A. Abidi

2008-12-01T23:59:59.000Z

64

Spatial correlation and mobility-aware traffic modeling for wireless sensor networks  

Science Conference Proceedings (OSTI)

Recently, there has been a great deal of research on using mobility in wireless sensor networks (WSNs) to facilitate surveillance and reconnaissance in a wide deployment area. Besides providing an extended sensing coverage, node mobility along with spatial ... Keywords: long-range dependence, mobility, resource provision, spatial correlation, wireless sensor network (WSN)

Pu Wang; Ian F. Akyildiz

2011-12-01T23:59:59.000Z

65

Application Opportunities in Wireless Communications  

Science Conference Proceedings (OSTI)

This report presents results of examining applications of wireless technologies that may present business potential for energy companies. Five different wireless technology areas are reviewed. Three areas -- Communication Networks, Monitored Security Services, and Home Automation -- potentially represent new business ventures for utilities. Two areas -- Automatic Vehicle Location and Automated Field-Force Management -- represent wireless applications with potential for reduced operating costs and improve...

1998-08-20T23:59:59.000Z

66

A study of lustre networking over a 100 gigabit wide area network with 50 milliseconds of latency  

Science Conference Proceedings (OSTI)

As part of the SCinet Research Sandbox at the 2011 International Conference for High Performance Computing, Networking, Storage and Analysis (SC11), Indiana University utilized a dedicated 100 Gbps wide area network (WAN) link spanning more than 3,500 ... Keywords: i/o benchmarking, lustre, networking, wide area file systems

Scott Michael; Liang Zhen; Robert Henschel; Stephen Simms; Eric Barton; Matthew Link

2012-06-01T23:59:59.000Z

67

Wide-area, Sub-decimetre Positioning for Airborne LiDAR Surveys Using  

E-Print Network (OSTI)

Airborne LiDAR surveys produce high-resolution, very accurate surface elevation models which are used for many applications in surveying and civil engineering, as well as for flood prevention and mitigation, monitoring coastal erosion and land subsidence, etc. The key to producing high quality elevation products is very precise geolocation and orientation (or “georeferencing”) of the LiDAR instrument at the times when the measurements are made, obtained with a combination of on-board GNSS and inertial sensors. The usual practice is to deploy reference GPS/GNSS land receivers in the area where the aircraft will be flying, and to obtain a precise trajectory by means of the short-baseline differential GNSS technique. This could mean installing and operating receivers at many sites during a flight mission if the area surveyed is a large one. In this paper, an example of an alternative approach will be presented: using as reference receivers those of a sparse network of Continuously Operating Reference Stations (CORS) in New South Wales known as CORSnet-NSW, and a wide-area GNSS technique for obtaining the aircraft trajectory with sub-decimetre accuracy even with baseline lengths of several hundred kilometres. This may be comparable in precision and accuracy to the short-baseline

Oscar L. Colombo; Shane Brunker; Glenn Jones; Volker Janssen

2009-01-01T23:59:59.000Z

68

Evaluation of replacement protocols and modifications to TCP to enhance ASC Wide Area Network performance.  

SciTech Connect

Historically, TCP/IP has been the protocol suite used to transfer data throughout the Advanced Simulation and Computing (ASC) community. However, TCP was developed many years ago for an environment very different from the ASC Wide Area Network (WAN) of today. There have been numerous publications that hint of better performance if modifications were made to the TCP algorithms or a different protocol was used to transfer data across a high bandwidth, high delay WAN. Since Sandia National Laboratories wants to maximize the ASC WAN performance to support the Thor's Hammer supercomputer, there is strong interest in evaluating modifications to the TCP protocol and in evaluating alternatives to TCP, such as SCTP, to determine if they provide improved performance. Therefore, the goal of this project is to test, evaluate, compare, and report protocol technologies that enhance the performance of the ASC WAN.

Romero, Randy L. Jr.

2004-09-01T23:59:59.000Z

69

The High Performance and Wide Area Analysis and Mining of Scientific & Engineering Data  

SciTech Connect

This final report summarizes our accomplishments and findings and includes recent publications occurring in the final period of this award. One of our research goals was to develop algorithms and services for remote data analysis and distributed data mining which scaled from the commodity internet to high performance networks. When we began the project there was no effective mechanisms to achieve high end to end performance for data intensive applications over wide area, high bandwidth networks. For this reason, we developed algorithms and services for Layers 2,3, and 4 in the simple data web application stack below. We describe our research accomplishments for each of these layers in turn: Layer 4--Data Web Applications; Layer 3--Data Web Services; Layer 2--Network Protocol Services; Layer 1--IP.

Grossman, R.

2002-12-01T23:59:59.000Z

70

Sandia's Network for Supercomputer `96: Linking Supercomputers in a Wide Area Asynchronous Transfer Mode (ATM) Network  

E-Print Network (OSTI)

The advanced networking department at Sandia National Laboratories has used the annual Supercomputing conference sponsored by the IEEE and ACM for the past several years as a forum to demonstrate and focus communication and networking developments. At Supercomputing 96, for the first time, Sandia National Laboratories, Los Alamos National Laboratory, and Lawrence Livermore National Laboratory combined their Supercomputing 96 activities within a single research booth under the ASCI banner. Sandia provided the network design and coordinated the networking activities within the booth. At Supercomputing 96, Sandia elected: to demonstrate wide area network connected Massively Parallel Processors, to demonstrate the functionality and capability of Sandia's new edge architecture, to demonstrate inter-continental collaboration tools, and to demonstrate ATM video capabilities. This paper documents those accomplishments, discusses the details of their implementation, and describes how these dem...

Thomas Pratt Luis; Luis G. Martinez; Thomas V. Archuleta

1997-01-01T23:59:59.000Z

71

Barriers to a Wide-Area Trusted Network Early Warning System For Electric  

E-Print Network (OSTI)

It is apparent that perturbations of the North American electric power grid follow the patterns and characteristics of Self Organized Critical (SOC) systems. Published studies show SOC systems exhibit statistical properties that may result in early warning systems predicting electric power instability and loss of reliability. However, in order for such an early warning system to exist, a trusted wide-area data network must collate information from disparate subsystems and compile that information into homogenous data records for input to a modeling system. This paper explores similarities between widearea trusted computer networks and the needs of a widearea trusted network early warning system for electric power instability. An analysis of commercial equipment used in power stations uncovers disparate access methods and protocols that inhibit interoperability, and yet that problem has been mitigated in computer networking. Recent advances lend hope that wide-area data collection and modeling of electric power system perturbations will be commonplace in the not to distant future. I. Modeling Disturbance Data The electric power grid can be modeled as a complex system of dynamic load and generation balances characterized by two types of stability. Steady-state stability describes the nominal balancing of relatively minor disturbances in load/generation fluctuations caused by normal start-up and shut-down events associated with the millions of appliances and equipment attached to the grid. Constraints on operating parameters – nominally voltage levels, current magnitudes and power flows – are used to achieve steady-state equilibrium where the generation input is matched to system losses and electrical outputs. Whereas, transient stability describes the power systems ability (or lack thereof) to absorb major disturbances and return to a relatively balanced steadystate. Load shedding, generation shedding, and regional

Paul W. Oman; Jeff Roberts

2002-01-01T23:59:59.000Z

72

THE WIDE-AREA ENERGY STORAGE AND MANAGEMENT SYSTEM PHASE II Final Report - Flywheel Field Tests  

Science Conference Proceedings (OSTI)

This research was conducted by Pacific Northwest National Laboratory (PNNL) operated for the U.S. department of Energy (DOE) by Battelle Memorial Institute for Bonneville Power Administration (BPA), California Institute for Energy and Environment (CIEE) and California Energy Commission (CEC). A wide-area energy management system (WAEMS) is a centralized control system that operates energy storage devices (ESDs) located in different places to provide energy and ancillary services that can be shared among balancing authorities (BAs). The goal of this research is to conduct flywheel field tests, investigate the technical characteristics and economics of combined hydro-flywheel regulation services that can be shared between Bonneville Power Administration (BPA) and California Independent System Operator (CAISO) controlled areas. This report is the second interim technical report for Phase II of the WAEMS project. This report presents: 1) the methodology of sharing regulation service between balancing authorities, 2) the algorithm to allocate the regulation signal between the flywheel and hydro power plant to minimize the wear-and-tear of the hydro power plants, 3) field results of the hydro-flywheel regulation service (conducted by the Beacon Power), and 4) the performance metrics and economic analysis of the combined hydro-flywheel regulation service.

Lu, Ning; Makarov, Yuri V.; Weimar, Mark R.; Rudolph, Frank; Murthy, Shashikala; Arseneaux, Jim; Loutan, Clyde; Chowdhury, S.

2010-08-31T23:59:59.000Z

73

2008 Special Issue: Optimal wide-area monitoring and nonlinear adaptive coordinating neurocontrol of a power system with wind power integration and multiple FACTS devices  

Science Conference Proceedings (OSTI)

Wide-area coordinating control is becoming an important issue and a challenging problem in the power industry. This paper proposes a novel optimal wide-area coordinating neurocontrol (WACNC), based on wide-area measurements, for a power system with power ... Keywords: Adaptive critic designs, FACTS devices, Particle swarm optimization, Radial basis function network, Wide-area control, Wind power

Wei Qiao; Ganesh K. Venayagamoorthy; Ronald G. Harley

2008-03-01T23:59:59.000Z

74

Wireless device monitoring methods, wireless device monitoring systems, and articles of manufacture  

SciTech Connect

Wireless device monitoring methods, wireless device monitoring systems, and articles of manufacture are described. According to one embodiment, a wireless device monitoring method includes accessing device configuration information of a wireless device present at a secure area, wherein the device configuration information comprises information regarding a configuration of the wireless device, accessing stored information corresponding to the wireless device, wherein the stored information comprises information regarding the configuration of the wireless device, comparing the device configuration information with the stored information, and indicating the wireless device as one of authorized and unauthorized for presence at the secure area using the comparing.

McCown, Steven H. (Rigby, ID); Derr, Kurt W. (Idaho Falls, ID); Rohde, Kenneth W. (Idaho Falls, ID)

2012-05-08T23:59:59.000Z

75

Virtual pan-tilt-zoom for a wide-area-video surveillance system  

E-Print Network (OSTI)

Advancements in the CMOS Image Sensor have enabled very high-performance, high resolution imaging systems to be built at relatively low cost. The availability of high-pixel count video imaging systems that can cover a wide ...

Sinn, Richard, M. Eng. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

76

A Study of the Environmental Impact of Wired and Wireless Local Area Network Access  

E-Print Network (OSTI)

consumed and greenhouse gas emissions in the manufacture of Ethernet switches and WiFi access points. INTRODUCTION Network access through local area networks (LANs) is ubiquitous in residential, commercial, along with the greenhouse gas emissions they are responsible for. In addition, this paper also aims

Sikdar, Biplab

77

Recommended Practices Guide For Securing ZigBee Wireless Networks...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

networks. ZigBee is a protocol specification and industry standard for a type of wireless communications technology generically known as Low-Rate Wireless Personal Area Networks...

78

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

79

Time Stamp Attack on Wide Area Monitoring System in Smart Grid  

E-Print Network (OSTI)

Security becomes an extremely important issue in smart grid. To maintain the steady operation for smart power grid, massive measurement devices must be allocated widely among the power grid. Previous studies are focused on false data injection attack to the smart grid system. In practice, false data injection attack is not easy to implement, since it is not easy to hack the power grid data communication system. In this paper, we demonstrate that a novel time stamp attack is a practical and dangerous attack scheme for smart grid. Since most of measurement devices are equipped with global positioning system (GPS) to provide the time information of measurements, it is highly probable to attack the measurement system by spoofing the GPS. By employing the real measurement data in North American Power Grid, simulation results demonstrate the effectiveness of the time stamp attack on smart grid.

Zhang, Zhenghao; Li, Husheng; Pei, Changxing

2011-01-01T23:59:59.000Z

80

CERTS 2012 Program Review - Real-Time Wide-Area Montoring Tool Based on CELL Method - Yuri Makarov, PNNL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE/CERTS Internal Program Review DOE/CERTS Internal Program Review Real-Time Wide-Area Monitoring Tool Based on Characteristic Ellipsoid Method (CELL) Yuri Makarov Pacific Northwest National Laboratory (E-mail: yuri.makarov@pnnl.gov) June 12-13, 2012 Washington DC 2 Acknowledgements Phil N. Overholt, DOE Jeff E. Dagle, PNNL, CERTS PM Joe H. Eto, LBNL, CERTS PM Jian Ma, Burns & McDonnell, Former Project Lead 3 Project Objectives and Quick Overview  Objective:  Develop a relatively simple, easy-to-implement and easy-to-use tool to monitor, predict and control the dynamic behavior of power systems for wide-area situational awareness, prediction and decision making support for operators  Specific Objectives:  Monitor dynamic behaviors of power systems

Note: This page contains sample records for the topic "wide area wireless" 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

Wireless Sensors and Networks for Advanced Energy Management  

SciTech Connect

Numerous national studies and working groups have identified low-cost, very low-power wireless sensors and networks as a critical enabling technology for increasing energy efficiency, reducing waste, and optimizing processes. Research areas for developing such sensor and network platforms include microsensor arrays, ultra-low power electronics and signal conditioning, data/control transceivers, and robust wireless networks. A review of some of the research in the following areas will be discussed: (1) Low-cost, flexible multi-sensor array platforms (CO{sub 2}, NO{sub x}, CO, humidity, NH{sub 3}, O{sub 2}, occupancy, etc.) that enable energy and emission reductions in applications such as buildings and manufacturing; (2) Modeling investments (energy usage and savings to drive capital investment decisions) and estimated uptime improvements through pervasive gathering of equipment and process health data and its effects on energy; (3) Robust, self-configuring wireless sensor networks for energy management; and (4) Quality-of-service for secure and reliable data transmission from widely distributed sensors. Wireless communications is poised to support technical innovations in the industrial community, with widespread use of wireless sensors forecasted to improve manufacturing production and energy efficiency and reduce emissions. Progress being made in wireless system components, as described in this paper, is helping bring these projected improvements to reality.

Hardy, J.E.

2005-05-06T23:59:59.000Z

82

Security and Performance Considerations in Wireless Networks  

E-Print Network (OSTI)

ACM Workshop on Wireless Security, 2004. [3] ISM Wide-bandTraffic Flows. In Network Security Lab (NSL) Technicalthe Challenges of Security in a Mobile Environment. In

Pelechrinis, Konstantinos

2010-01-01T23:59:59.000Z

83

The Nuclear Material Focus Area Roadmapping Process Utilizing Environmental Management Complex-Wide Nuclear Material Disposition Pathways  

SciTech Connect

This paper describes the process that the Nuclear Materials Focus Area (NMFA) has developed and utilizes in working with individual Department of Energy (DOE) sites to identify, address, and prioritize research and development efforts in the stabilization, disposition, and storage of nuclear materials. By associating site technology needs with nuclear disposition pathways and integrating those with site schedules, the NMFA is developing a complex wide roadmap for nuclear material technology development. This approach will leverage technology needs and opportunities at multiple sites and assist the NMFA in building a defensible research and development program to address the nuclear material technology needs across the complex.

Sala, D. R.; Furhman, P.; Smith, J. D.

2002-02-26T23:59:59.000Z

84

The DOE Wide Area Measurement System (WAMS) Project -- Demonstration of dynamic information technology for the future power system  

DOE Green Energy (OSTI)

In 1989 the Bonneville Power Administration (BPA) and the Western Power Administration (WAPA) joined the US Department of Energy (DOE) in an assessment of longer-term research and development needs for future electric power system operation. The effort produced a progressively sharper vision of a future power system in which enhanced control and operation are the primary means for serving new customer demands in an environment characterized by increased competition, a wider range of services and vendors, and much narrower operating margins. Technology and infrastructure for real time access to wide area dynamic information were identified as critical path elements in realizing that vision. In 1995 the DOE accordingly launched the Wide Area Measurement System (WAMS) Project jointly with the two Power Marketing Administrations (PMAs) to address these issues in a practical operating environment the western North America power system. The Project draws upon many years of PMA effort and related collaboration among the western utilities, plus an expanding infrastructure that includes regionally involved contractors, universities, and National Laboratories plus linkages to the Electric Power Research Institute (EPRI).

Mittelstadt, W.A. [Bonneville Power Administration (United States); Hauer, J.F. [Pacific Northwest Lab., Richland, WA (United States); Krause, P.E.; Wilson, R.E. [Western Power Administration (United States); Overholt, P.N. [USDOE (United States); Rizy, D.T. [Oak Ridge National Lab., TN (United States)

1995-12-31T23:59:59.000Z

85

Wide-Area Energy Storage and Management system to Balance Intermittent Resources in the Bonneville Power Administration and California ISO Control Areas  

DOE Green Energy (OSTI)

The entire project addresses the issue of mitigating additional intermittency and fast ramps that occur at higher penetration of intermittent resources, including wind genera-tion, in the Bonneville Power Administration (BPA) and the California Independent Sys-tem Operator (California ISO) control areas. The proposed Wide Area Energy Storage and Management System (WAEMS) will address the additional regulation requirement through the energy exchange between the participating control areas and through the use of energy storage and other generation resources. For the BPA and California ISO control centers, the new regulation service will look no different comparing with the traditional regulation resources. The proposed project will benefit the regulation service in these service areas, regardless of the actual degree of penetration of the intermittent resources in the regions. The project develops principles, algorithms, market integration rules, functional de-sign and technical specifications for the WAEMS system. The project is sponsored by BPA and supported in kind by California ISO, Beacon Power Corporation, and the Cali-fornia Energy Commission (CEC).

Makarov, Yuri V.; Yang, Bo; DeSteese, John G.; Lu, Shuai; Miller, Carl H.; Nyeng, Preben; Ma, Jian; Hammerstrom, Donald J.; Vishwanathan, Vilanyur V.

2008-06-30T23:59:59.000Z

86

The DOE Wide Area Measurement System (WAMS) Project: Demonstration of dynamic information technology for the future power system  

SciTech Connect

In 1989 the Bonneville Power Administration (BPA) and the Western Area Power Administration (WAPA) joined the US Department of Energy (DOE) in an assessment of longer-term research and development needs for future electric power system operation. The effort produced a progressively sharper vision of a future power system in which enhanced control and operation are the primary means for serving new customer demands, in an environment where increased competition, a wider range of services and vendors, and much narrower operating margins all contribute to increased system efficiencies and capacity. Technology and infrastructure for real time access to wide area dynamic information were identified as critical path elements in realizing that vision. In 1995 the DOE accordingly launched the Wide Area Measurement System (WAMS) Project jointly with the two Power Marketing Administrations (PMAs) to address these issues in a practical operating environment--the western North America power system. The Project draws upon many years of PMA effort and related collaboration among the western utilities, plus an expanding infrastructure that includes regionally involved contractors, universities, and National Laboratories plus linkages to the Electric Power Research Institute (EPRI). The WAMS project also brings added focus and resources to the evolving Western System Dynamic Information Network, or WesDINet. This is a collective response of the Western Systems Coordinating Council (WSCC) member utilities to their shared needs for direct information about power system characteristics, model fidelity, and operational performance. The WAMS project is a key source of the technology and backbone communications needed to make WesDINet a well integrated, cost effective enterprise network demonstrating the role of dynamic information technology in the emerging utility environment.

Mittelstadt, W.A. [USDOE Bonneville Power Administration, Portland, OR (United States); Krause, P.E.; Wilson, R.E. [USDOE Western Area Power Administration, Golden, CO (United States); Overholt, P.N. [USDOE, Washington, DC (United States); Sobajic, D.J. [Electric Power Research Inst., Palo Alto, CA (United States); Hauer, J.F. [Pacific Northwest National Lab., Richland, WA (United States); Rizy, D.T. [Oak Ridge National Lab., TN (United States)

1996-07-01T23:59:59.000Z

87

Sandia`s network for Supercomputer `96: Linking supercomputers in a wide area Asynchronous Transfer Mode (ATM) network  

Science Conference Proceedings (OSTI)

The advanced networking department at Sandia National Laboratories has used the annual Supercomputing conference sponsored by the IEEE and ACM for the past several years as a forum to demonstrate and focus communication and networking developments. At Supercomputing 96, for the first time, Sandia National Laboratories, Los Alamos National Laboratory, and Lawrence Livermore National Laboratory combined their Supercomputing 96 activities within a single research booth under the ASO banner. Sandia provided the network design and coordinated the networking activities within the booth. At Supercomputing 96, Sandia elected: to demonstrate wide area network connected Massively Parallel Processors, to demonstrate the functionality and capability of Sandia`s new edge architecture, to demonstrate inter-continental collaboration tools, and to demonstrate ATM video capabilities. This paper documents those accomplishments, discusses the details of their implementation, and describes how these demonstrations support Sandia`s overall strategies in ATM networking.

Pratt, T.J.; Martinez, L.G.; Vahle, M.O. [and others

1997-04-01T23:59:59.000Z

88

Wireless Networking  

Science Conference Proceedings (OSTI)

Over the past decade, the world has witnessed an explosion in the development and deployment of new wireless network technologies. From cellular mobile telephony to the ubiquitous "WiFi" networks in coffee-shops and airports, to the emerging WiMAX wireless ... Keywords: Networking

Anurag Kumar; D. Manjunath; Joy Kuri

2008-03-01T23:59:59.000Z

89

An implementation of a 5.25 GHz transceiver for high data rate wireless applications  

E-Print Network (OSTI)

The desire for transmission of high data rate information across wireless channels has grown immensely over the past decade. Wireless devices available today including mobile phones, wireless local area networks (WLANs) ...

Matalon, Nir

2005-01-01T23:59:59.000Z

90

A Comparison of Wireless Local Loop Technologies with Reference to their Application in Rural Areas of Pakistan  

E-Print Network (OSTI)

Areas of Pakistan Muhammad Usman Ilyas Department of Computer Science, School of Arts & Sciences, Lahore University of Management Sciences, Lahore, Pakistan. muilyas@lums.edu.pk Abstract: In this paper LMDS in rural areas of Pakistan. The low population density and great distances in Pakistan's rural areas make

Radha, Hayder

91

CS 535- Wireless Network Security  

E-Print Network (OSTI)

This is a 3-credit course that focuses on security and privacy issues in wireless networks and systems. Generally the security of MAC and especially upper layers are considered in this class. This course is not intended to cover cryptography in detail, but an overview of cryptography will be given at the beginning of the course so that the students who do not know cryptography would have sufficient information to understand the rest of the course. Although the catalogue information for this course (see below) several sub areas of wireless network security, in this course we will focus on ad hoc and sensor network security. Catalogue Data: This course covers security and privacy issues in wireless networks and systems, such as cellular networks, wireless LANs, wireless PANs, mobile ad hoc networks, vehicular networks, satellite networks, wireless mesh networks, sensor networks and RFID systems. Security problems of MAC and especially upper layers will be emphasized. Attacks and proposed solutions at several layers, authentication, key distribution and key management, secure routing, selfish and malicious behaviors, and secure group communication are analyzed for applicable wireless network types. A short overview of cryptography and wireless networking principles will be given at the beginning of the course. Prerequisite: Formally there is no prerequisite for this course, but students are expected to come with undergrad level computer networks background. Moreover, computer-programming expertise is necessary. Instructor: Schedule:

Albert Levi

2008-01-01T23:59:59.000Z

92

An efficient synchronisation protocol for wireless sensor network  

Science Conference Proceedings (OSTI)

Time synchronisation is a critical topic in wireless sensor networks for its wide applications, such as data fusion, TDMA scheduling and cooperated sleeping, etc. In this paper, we present an Accurate Time Synchronisation (ATS) protocol based on ... Keywords: WSNs, drift, linear least squares, offset, time synchronisation, wireless networks, wireless sensor networks

Liusheng Huang; Hongli Xu; Yingyu Wan; Junmin Wu; Hong Li

2007-04-01T23:59:59.000Z

93

Optimal monitoring in multi-channel multi-radio wireless mesh networks  

Science Conference Proceedings (OSTI)

Wireless mesh networks (WMN) are finding increasing usage in city-wide deployments for providing network connectivity. Mesh routers in WMNs typically use multiple wireless channels to enhance the spatial-reuse of frequency bands, often with multiple ... Keywords: approximation algorithm, lp rounding, multi-channel multi-radio wireless networks, security monitoring, wireless mesh networks

Dong-Hoon Shin; Saurabh Bagchi

2009-05-01T23:59:59.000Z

94

Decision support system for estimating the technically and economically exploitable renewable energy sources potential in wide areas for connection to high voltage networks  

Science Conference Proceedings (OSTI)

A decision support information system for estimating the technically and economically exploitable renewable energy sources (RES) potential in wide areas is presented in this paper. The system estimates the RES potential in specific areas, examines ... Keywords: DSS, GIS, biomass, decision support systeoms, distributed generation, geographical information systems, high voltage network, renewable energy estimation, renewable energy forecasting, renewable energy potential, renewable energy sources, small hydro, wind energy, wind power

Michael Psalidas; Demosthenes Agoris; Vassilis Kilias; Kostas Tigas; Panagiotis Stratis; Giannis Vlachos

2005-04-01T23:59:59.000Z

95

Airborne wireless communication systems, airborne communication methods, and communication methods  

SciTech Connect

An airborne wireless communication system includes circuitry configured to access information describing a configuration of a terrestrial wireless communication base station that has become disabled. The terrestrial base station is configured to implement wireless communication between wireless devices located within a geographical area and a network when the terrestrial base station is not disabled. The circuitry is further configured, based on the information, to configure the airborne station to have the configuration of the terrestrial base station. An airborne communication method includes answering a 911 call from a terrestrial cellular wireless phone using an airborne wireless communication system.

Deaton, Juan D. (Menan, ID); Schmitt, Michael J. (Idaho Falls, ID); Jones, Warren F. (Idaho Falls, ID)

2011-12-13T23:59:59.000Z

96

The development of large area saturable Bragg reflectors for the generation of widely-tunable ultra-short pulses  

E-Print Network (OSTI)

This thesis focuses on the realization of two photonic devices; 1) semiconductor lasers and 2) large area broadband Saturable Bragg Reflectors (SBRs). Semiconductor lasers explore the use of 3D and 2D quantum confinement ...

Nabanja, Sheila P

2012-01-01T23:59:59.000Z

97

Architectural framework for wireless mobile ad hoc networks (AF WMANETs)  

Science Conference Proceedings (OSTI)

WMANETs are more popular and successful in the marketplace of the future wireless technology as indicated by the increasing usage of Bluetooth and Wireless Local Area Networks (WLANs). To aid the application of WMANETs in any wireless environment, when ... Keywords: Computational viewpoint, Enterprise viewpoint, Information viewpoint, RM-ODP, Security, TINA, WMANETs

I. Almomani; M. Al-Akaidi; P. Reynolds; J. Ivins

2006-12-01T23:59:59.000Z

98

Wireless sensor networks for healthcare: A survey  

Science Conference Proceedings (OSTI)

Becoming mature enough to be used for improving the quality of life, wireless sensor network technologies are considered as one of the key research areas in computer science and healthcare application industries. The pervasive healthcare systems provide ... Keywords: Care for elderly, Children and chronically ill, Pervasive healthcare, Wireless sensor networks

Hande Alemdar; Cem Ersoy

2010-10-01T23:59:59.000Z

99

Knowledge-based duty cycle estimation in wireless sensor networks: Application for sound pressure monitoring  

Science Conference Proceedings (OSTI)

Wireless sensor networks comprise an important research area and a near future for industry and communications. Wireless sensor networks contain resource-constrained sensor nodes that are powered by small batteries, limited process and memory and wireless ... Keywords: Constrained device, Fuzzy rule based system, Multi-agent system, Sound pressure, Wireless sensor network

J. C. Cuevas-Martinez; J. Canada-Bago; J. A. Fernandez-Prieto; M. A. Gadeo-Martos

2013-02-01T23:59:59.000Z

100

Enhanced Chemical Incident Response Plan (ECIRP). Appendix F, remediation analysis with Decision Support Tools (DSTs) for wide-area chemical hazards.  

SciTech Connect

The Defense Threat Reduction Agency (DTRA) commissioned an assessment of the Consequence Management (CM) plans in place on military bases for response to a chemical attack. The effectiveness of the CM plans for recovering from chemical incidents was modeled using a multiple Decision Support Tools (DSTs). First, a scenario was developed based on an aerial dispersion of a chemical agent over a wide-area of land. The extent of contamination was modeled with the Hazard Prediction and Assessment Capability (HPAC) tool. Subsequently, the Analyzer for Wide Area Restoration Effectiveness (AWARE) tool was used to estimate the cost and time demands for remediation based on input of contamination maps, sampling and decontamination resources, strategies, rates and costs. The sampling strategies incorporated in the calculation were designed using the Visual Sample Plan (VSP) tool. Based on a gaps assessment and the DST remediation analysis, an Enhanced Chemical Incident Response Plan (ECIRP) was developed.

Hassig, Nancy L. (Pacific Northwest National Laboratory, Richland, WA); Pulsipher, Brent A. (Pacific Northwest National Laboratory, Richland, WA); Foltz, Greg W.; Hoette, Trisha Marie

2011-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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

Wireless Policy, Cyber Security, Information Technology Division, ITD  

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

Brookhaven Wireless Access Policy Brookhaven Wireless Access Policy Title: Deployment and Management of 802.11 and Related Wireless Standards Applicability: All Employees, Guests, System Administrators, and Management General Approved Technology Authentication Setting the Service Set Identifier (SSID) Exceptions Responsibilities of Requestor Responsibilities of the ITD WAP System Administrator Responsibility of Chief of Cyber Security Wireless Policy Definitions Standards-Based Management System (SBMS) Subject Area: Cyber Security, Unclassified Using Computing Resources (Steps 7-11 apply to BNL's wireless networks) General The purpose of the wireless policy and related standards and guidelines is to assure that Brookhaven National Laboratory's (BNL's) employees, guests, and contractors have access to a reliable, robust, and integrated wireless network, and to increase the security of the campus wireless network to the extent possible.

102

Lighting Group: Controls: Wireless Controls  

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

Wireless Controls Wireless Lighting Control System (with DUST Networks) Objective The project objectives are to: 1. Demonstrate that wireless technology can be cost-effectively...

103

Wireless networking security: open issues in trust, management, interoperation and measurement  

Science Conference Proceedings (OSTI)

The pervasive availability and wide usage of wireless networks with different kinds of topologies, techniques and protocol suites have brought with them a need to improve security mechanisms. The design, development and evaluation of security techniques ... Keywords: interoperation, management, measurement, network security, open security, trust, wireless networks, wireless security

Joseph B. Evans; Weichao Wang; Benjamin J. Ewy

2006-09-01T23:59:59.000Z

104

Improving packet delivery efficiency using multi-radio diversity in wireless LANs  

E-Print Network (OSTI)

Data transmissions in Wireless Local Area Networks (WLANs) often suffer from bit errors that arise from the notoriously complex and time-varying signal propagation characteristics of the wireless medium. A number of physical ...

Miu, Allen Ka Lun, 1977-

2006-01-01T23:59:59.000Z

105

Performance of variable bit rate wireless communication systems over Nakagami fading channels  

Science Conference Proceedings (OSTI)

Currently, several wireless standards, both for voice and data communications as well as wireless local area networks, achieve a variable bit rate by different combinations of either binary or non-binary modulation and convolutional codes having different ...

Patrick Count; Clark Robertson

2003-10-01T23:59:59.000Z

106

Network Electricity Use Associated with Wireless Personal Digital Assistants  

E-Print Network (OSTI)

Network Electricity Use Associated with Wireless Personal Digital Assistants Jonathan Koomey1 the widely cited claim that the network electricity use associated with a wireless personal digital assistant PDA is equal to the electricity consumed by a refrigerator. It compiles estimates of the data flows

Kammen, Daniel M.

107

Post-Closure Evaluation of the Area 3 and Area 5 Radioactive Waste Management Sites at the Nevada National Security Site in Support of the Site-Wide Environmental Impact Statement  

Science Conference Proceedings (OSTI)

The post-closure performance of the Area 3 Radioactive Waste Management Site (RWMS) and Area 5 RWMS are evaluated for the Site-Wide Environmental Impact Statement using current performance assessment and composite analysis methods and models. Two alternatives with different future waste volumes and inventories are evaluated. The No Action Alternative evaluates the inventory disposed through fiscal year (FY) 2010 plus an additional 4.5E5 cubic meters (m3) (1.59E7 cubic feet [ft3]) of waste disposed at the Area 5 RWMS. The Expanded Operations Alternative evaluates the FY 2010 inventory plus an additional 1.42E6 m3 (5.03E7 ft3) of waste disposed at the Area 5 RWMS and 4.93E4 m3 (1.74E6 ft3) disposed at the Area 3 RWMS. Both the No Action and Expanded Operations Alternatives have a reasonable expectation of meeting all performance objectives of U.S. Department of Energy Order DOE O 435.1, “Radioactive Waste Management.” No significant difference between the two alternatives was found because the waste concentrations are similar. The performance assessment model assesses radiological risk for residents at the RWMS boundary where risk is more closely related to waste concentration than total waste inventory. Results for the composite analysis also indicate that the dose constraint and dose limit can be met for both alternatives.

NSTec Environmental Restoration

2011-04-26T23:59:59.000Z

108

Wireless Power Transfer  

Science Conference Proceedings (OSTI)

Nikola Tesla's dream in the early 20th century of a "World Wireless System" led him to build the Wardenclyffe Tower, a prototype base station serving as an emitter for his "World Wireless System". The base station was to supply wireless electrical energy ...

Johnson I. Agbinya

2012-07-01T23:59:59.000Z

109

Surface Area and Microporosity of Carbon Aerogels from Gas Adsorption and Small- and Wide-Angle X-ray Scattering Measurements  

E-Print Network (OSTI)

A carbon aerogel was obtained by carbonization of an organic aerogel prepared by sol-gel polymerization of resorcinol and formaldehyde in water. The carbon aerogel was then CO2 activated at 800 °C to increase its surface area and widen its microporosity. Evolution of these parameters was followed by gas adsorption and small- and wide-angle X-ray scattering (SAXS and WAXS, respectively) with contrast variation by using dry and wet (immersion in benzene and m-xylene) samples. For the original carbon aerogel, the surface area, SSAXS, obtained by SAXS, is larger than that obtained by gas adsorption (Sads). The values become nearly the same as the degree of activation of the carbon aerogel increases. This feature is due to the widening of the narrow microporosity in the carbon aerogel as the degree of activation is increased. In addition, WAXS results show that the short-range spatial correlations into the assemblies of hydrocarbon molecules confined inside the micropores are different from those existing in the liquid phase. 1.

David Fairén-jiménez; Francisco Carrasco-marín; David Djurado; Françoise Bley; Françoise Ehrburger-dolle; Carlos Moreno-castilla

2005-01-01T23:59:59.000Z

110

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

111

Mobility-assisted minimum connected cover in a wireless sensor network  

Science Conference Proceedings (OSTI)

All properties of mobile wireless sensor networks (MWSNs) are inherited from static wireless sensor networks (WSNs) and meanwhile have their own uniqueness and node mobility. Sensor nodes in these networks monitor different regions of an area of interest ... Keywords: Energy-aware selection method, Minimum connected sensor cover set, Mobile wireless sensor networks, Redundant node, Relocation

Ahmed M. Khedr; Walid Osamy

2012-07-01T23:59:59.000Z

112

Hazmat Cam Wireless Video System  

SciTech Connect

This paper describes the Hazmat Cam Wireless Video System and its application to emergency response involving chemical, biological or radiological contamination. The Idaho National Laboratory designed the Hazmat Cam Wireless Video System to assist the National Guard Weapons of Mass Destruction - Civil Support Teams during their mission of emergency response to incidents involving weapons of mass destruction. The lightweight, handheld camera transmits encrypted, real-time video from inside a contaminated area, or hot-zone, to a command post located a safe distance away. The system includes a small wireless video camera, a true-diversity receiver, viewing console, and an optional extension link that allows the command post to be placed up to five miles from danger. It can be fully deployed by one person in a standalone configuration in less than 10 minutes. The complete system is battery powered. Each rechargeable camera battery powers the camera for 3 hours with the receiver and video monitor battery lasting 22 hours on a single charge. The camera transmits encrypted, low frequency analog video signals to a true-diversity receiver with three antennas. This unique combination of encryption and transmission technologies delivers encrypted, interference-free images to the command post under conditions where other wireless systems fail. The lightweight camera is completely waterproof for quick and easy decontamination after use. The Hazmat Cam Wireless Video System is currently being used by several National Guard Teams, the US Army, and by fire fighters. The system has been proven to greatly enhance situational awareness during the crucial, initial phase of a hazardous response allowing commanders to make better, faster, safer decisions.

Kevin L. Young

2006-02-01T23:59:59.000Z

113

Vampire Attacks: Draining Life from Wireless Ad Hoc Sensor Networks  

Science Conference Proceedings (OSTI)

Ad hoc low-power wireless networks are an exciting research direction in sensing and pervasive computing. Prior security work in this area has focused primarily on denial of communication at the routing or medium access control levels. This paper explores ... Keywords: Denial of service, security, routing, ad hoc networks, sensor networks, wireless networks

Eugene Y. Vasserman; Nicholas Hopper

2013-02-01T23:59:59.000Z

114

A secure monitoring and control system for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

The maintenance of Wireless Sensor Networks (WSNs) can carry high or prohibitive costs, particularly, if the WSN is deployed in unattended areas. Secure monitoring and control of the WSN is vital, however, practical systems are rare and limited with ... Keywords: Monitoring,Wireless sensor networks,Control systems,Intrusion detection,Elliptic curve cryptography

Michael Riecker, Rainer Thome, Dingwen Yuan, Matthias Hollick

2012-10-01T23:59:59.000Z

115

Wireless sensor networks based on publish/subscribe messaging paradigms  

Science Conference Proceedings (OSTI)

Rapidly increasing development and application areas of wireless sensor networks requires the deployment of highly scalable and dynamic communications paradigms for coping with the complex data management tasks encountered in distributed environments. ... Keywords: publish/subscribe messaging systems, wireless sensor networks

Hakan Cam; Ozgur Koray Sahingoz; Ahmet Coskun Sonmez

2011-05-01T23:59:59.000Z

116

WARPnet: clean slate research on deployed wireless networks  

Science Conference Proceedings (OSTI)

In this demo we present the Wireless Open-Access Research Platform for Networks (WARPnet), a research testbed aimed at performing experiments at the network level. The platform is designed to support not only conventional research areas but also new ... Keywords: control, measurement, warp, warpnet, wireless

Siddharth Gupta; Chris Hunter; Patrick Murphy; Ashutosh Sabharwal

2009-05-01T23:59:59.000Z

117

Assessment framework for wireless V2V communication-based ITS applications; Assessment framework for wireless Vehicle-to-Vehicle communication-based Intelligent Transportation Systems applications.  

E-Print Network (OSTI)

??Inter-vehicle communication enabled by wireless technology is an emerging area of Intelligent Transportation Systems (ITS). This technology has generated great interest among automobile manufacturers and… (more)

Rajiwade, Swapnil Shankar

2011-01-01T23:59:59.000Z

118

Optimal placement and channel assignment of relay stations in heterogeneous wireless mesh networks by modified Bender's decomposition  

Science Conference Proceedings (OSTI)

Fixed Broadband Wireless Access (FBWA) technology is designed to serve as a wireless DSL replacement to provide broadband Internet access in underserved areas where no other access technology exists. Due to the enormousness of the target service area, ... Keywords: Bender's decomposition, Fixed broadband wireless access, Mathematical programming/optimization, Placement and channel assignment, Relay stations

Aaron So; Ben Liang

2009-01-01T23:59:59.000Z

119

ULTRA SECURE HIGH RELIABILITY WIRELESS RADIATION MONITOR  

SciTech Connect

Radiation monitoring in nuclear facilities is essential to safe operation of the equipment as well as protecting personnel. In specific, typical air monitoring of radioactive gases or particulate involves complex systems of valves, pumps, piping and electronics. The challenge is to measure a representative sample in areas that are radioactively contaminated. Running cables and piping to these locations is very expensive due to the containment requirements. Penetration into and out of an airborne or containment area is complex and costly. The process rooms are built with thick rebar-enforced concrete walls with glove box containment chambers inside. Figure 1 shows high temperature radiation resistance cabling entering the top of a typical glove box. In some case, the entire processing area must be contained in a 'hot cell' where the only access into the chamber is via manipulators. An example is shown in Figure 2. A short range wireless network provides an ideal communication link for transmitting the data from the radiation sensor to a 'clean area', or area absent of any radiation fields or radioactive contamination. Radiation monitoring systems that protect personnel and equipment must meet stringent codes and standards due to the consequences of failure. At first glance a wired system would seem more desirable. Concerns with wireless communication include latency, jamming, spoofing, man in the middle attacks, and hacking. The Department of Energy's Savannah River National Laboratory (SRNL) has developed a prototype wireless radiation air monitoring system that address many of the concerns with wireless and allows quick deployment in radiation and contamination areas. It is stand alone and only requires a standard 120 VAC, 60 Hz power source. It is designed to be mounted or portable. The wireless link uses a National Security Agency (NSA) Suite B compliant wireless network from Fortress Technologies that is considered robust enough to be used for classified data transmission in place of NSA Type 1 devices.

Cordaro, J.; Shull, D.; Farrar, M.; Reeves, G.

2011-08-03T23:59:59.000Z

120

Wireless Sensor Application Guideline  

Science Conference Proceedings (OSTI)

This guideline discusses the different wireless technologies in use today. Before wireless technologies were available, all the sensory connections and user interfaces in nuclear power plants had to be hard-wired. This was a limiting factor in developing a world-class condition-based maintenance (CBM) program. The wire runs were very expensive, and some equipment was in a remote or inaccessible location. With wireless technologies, adding continuous monitoring to equipment is often easy and inexpensive. ...

2002-12-29T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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

AREA  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

AREA AREA FAQ # Question Response 316 vs DCAA FAQ 1 An inquiry from CH about an SBIR recipient asking if a DCAA audit is sufficient to comply with the regulation or if they need to add this to their audit they have performed yearly by a public accounting firm. 316 audits are essentially A-133 audits for for-profit entities. They DO NOT replace DCAA or other audits requested by DOE to look at indirect rates or incurred costs or closeouts. DCAA would never agree to perform A-133 or our 316 audits. They don't do A-133 audits for DOD awardees. The purpose of the audits are different, look at different things and in the few instances of overlap, from different perspectives. 316

122

Recommended Practices Guide For Securing ZigBee Wireless Networks in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Practices Guide For Securing ZigBee Wireless Networks Practices Guide For Securing ZigBee Wireless Networks in Process Control System Environments Recommended Practices Guide For Securing ZigBee Wireless Networks in Process Control System Environments This paper addresses design principles and best practices regarding the secure implementation and operation of ZigBee wireless networks. ZigBee is a protocol specification and industry standard for a type of wireless communications technology generically known as Low-Rate Wireless Personal Area Networks (LR-WPAN). Recommended Practices Guide For Securing ZigBee Wireless Networks in Process Control System Environments More Documents & Publications Wireless System Considerations When Implementing NERC Critical Infrastructure Protection Standards WA_04_069__EATON_CORPORATION_Waiver_of_Domestic_and_Foreign_.pdf

123

An energy harvesting aware data dissemination strategy for energy rechargeable wireless sensor networks.  

E-Print Network (OSTI)

??A wireless sensor network (WSN) is often deployed in a harsh or hard-reach area and is required to operate for a long period time to… (more)

Gosavi, Amit

2012-01-01T23:59:59.000Z

124

CEMA: Comfort Control and Energy Management Algorithms for Use in Residential Spaces Through Wireless Sensor Networks .  

E-Print Network (OSTI)

??In recent years, many strides have been achieved in the area of Wireless Sensor Networks (WSNs), which is leading to constant innovations in the types… (more)

Henry, Rami F.Z.

2010-01-01T23:59:59.000Z

125

Wireless sensor network survey  

Science Conference Proceedings (OSTI)

A wireless sensor network (WSN) has important applications such as remote environmental monitoring and target tracking. This has been enabled by the availability, particularly in recent years, of sensors that are smaller, cheaper, and intelligent. These ... Keywords: Protocols, Sensor network deployment, Sensor network services, Survey, Wireless sensor network

Jennifer Yick; Biswanath Mukherjee; Dipak Ghosal

2008-08-01T23:59:59.000Z

126

Power-Efficient Data Management for a Wireless Structural Monitoring System  

E-Print Network (OSTI)

A low-cost wireless sensing unit for installation in structural monitoring systems is proposed. To eliminate the high cost of installing cables widely used in conventional systems, each wireless sensing unit includes wireless radios for reliable communication of response measurements. With wireless radios consuming large amounts of power, battery preservation can be achieved by limiting the use of the wireless channel. This study explores two approaches to reducing the power demands of the wireless sensing unit. First, embedded engineering analyses are carried out by the sensing unit’s computational core to avoid transmission of long time-history records. Various engineering algorithms are encoded and executed using structural response data to illustrate the power saved in local data interrogation. Second, lossless data compression using Huffman coding is employed to reduce the size of data packets wirelessly transmitted.

J. P. Lynch; A. Sundararajan; K. H. Law; A. S. Kiremidjian; E. Carryer

2003-01-01T23:59:59.000Z

127

Towards greener wireless transmission: Efficient power amplifier design  

Science Conference Proceedings (OSTI)

The power budget of a transmitter is critically dependent on the design of the Power Amplifier (PA). Different applications require widely different values for the Effective Isotropic Radiated Power (E.I.R.P). These values range from as low as -20 dBm ... Keywords: frequency 400 MHz to 2.25 GHz, greener wireless transmission, power amplifier design, highly efficient wireless power transmission, class-C amplifier, switched-capacitor PA, orthogonal frequency-division multiplexing modulation

K. Natarajan; Sangmin Yoo; D. J. Allstot; J. S. Walling

2011-07-01T23:59:59.000Z

128

Demand responsive public transportation using wireless technologies  

Science Conference Proceedings (OSTI)

Air pollution has been the bane of society for which we still have not got a satisfying solution. The air pollution due to automobiles constitutes around 60--90% of the total air pollution in the urban area. To curtail this, the mass transportation, ... Keywords: Djiktra's algorithm, on-demand public transportation, routing algorithms, wireless client-server backbone

S. Prashanth; Sp Geetha; Ga Shanmugha Sundaram

2011-12-01T23:59:59.000Z

129

Comments of On-Ramp Wireless, Inc. | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

On-Ramp Wireless, Inc. On-Ramp Wireless, Inc. Comments of On-Ramp Wireless, Inc. On-Ramp Wireless, Inc. ("On-Ramp") hereby submits comments in response to the Department of Energy's ("DOE") May 11, 2010 Request for Information as to the communications needs of electric utilities to inform federal Smart Grid policy. In these comments, On-Ramp addresses two vital aspects of the need for wireless communications in connection with Smart Grid-more specifically, for customer smart meters and devices and for certain types of distribution grid system monitoring. First, On-Ramp discusses the need to reliably link millions of customer meters and home area networks with each other and with utility access points. Second, On-Ramp discusses the importance of efficiently addressing

130

This project is to evaluate the benefits of the System-Wide Adaptive Ramp Metering (SWARM) system implemented in the Portland Metropolitan area as  

E-Print Network (OSTI)

Abstract This project is to evaluate the benefits of the System-Wide Adaptive Ramp Metering (SWARM-timed ramp metering to manage traffic congestion during the morning and afternoon peak periods. The SWARM implemented in stages since May 2005 and is operating on six of the seven metered freeway corridors. Results

Bertini, Robert L.

131

Network-aware Adaptation with Real-Time Channel Statistics for Wireless LAN Multimedia Transmissions in the Digital Home  

E-Print Network (OSTI)

This paper suggests the use of intelligent network-aware processing agents in wireless local area network drivers to generate metrics for bandwidth estimation based on real-time channel statistics to enable wireless multimedia application adaptation. Various configurations in the wireless digital home are studied and the experimental results with performance variations are presented.

Krishnaswamy, Dilip

2009-01-01T23:59:59.000Z

132

Management: Global positioning and wireless dispatching  

Science Conference Proceedings (OSTI)

Over the last several years, my company has been supplying many service companies with wireless dispatching solutions. Recently the impact of the system has been greatly increased with the introduction of a GPS (Global Position Systems) interface. This adds visual recognition as to the whereabouts of each vehicle within the customer service area. The only equipment required in the field for GPS is a transmit/receive device and a wireless modem, one mounted out of the way in the vehicle (under the seat) and a {open_quotes}hockey puck{close_quotes} size unit on the roof of the vehicle. The GPS received unit and wireless modem are used to retrieve the longitude, latitude and ground speed coordinates and transmit them back to the host system.

Wood, M. [ICC International, Cedar Knolls, NJ (United States)

1996-02-01T23:59:59.000Z

133

Wireless Communications and Networking Technologies for Smart Grid: Paradigms and Challenges  

E-Print Network (OSTI)

Smart grid, regarded as the next generation power grid, uses two-way flows of electricity and information to create a widely distributed automated energy delivery network. In this work we present our vision on smart grid from the perspective of wireless communications and networking technologies. We present wireless communication and networking paradigms for four typical scenarios in the future smart grid and also point out the research challenges of the wireless communication and networking technologies used in smart grid

Fang, Xi; Xue, Guoliang

2011-01-01T23:59:59.000Z

134

Wireless System Considerations When Implementing NERC Critical...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wireless System Considerations When Implementing NERC Critical Infrastructure Protection Standards Wireless System Considerations When Implementing NERC Critical Infrastructure...

135

Network coded wireless architecture  

E-Print Network (OSTI)

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

Katti, Sachin Rajsekhar

2008-01-01T23:59:59.000Z

136

Wireless Local Loop  

Science Conference Proceedings (OSTI)

Wireless local loop systems are available to provide both broadband and narrowband services to customers. Narrowband systems are generally either based on cordless or mobile standards, or a manufacturer‘s proprietary technology. They are generally ...

R. P. Merrett; P. V. E. Beastall; S. J. Buttery

1998-10-01T23:59:59.000Z

137

Joint spectrum allocation and scheduling for fair spectrum sharing in cognitive radio wireless networks  

Science Conference Proceedings (OSTI)

Cognitive radio and Dynamic Spectrum Access (DSA) enable wireless users to share a wide range of available spectrums. In this paper, we study joint spectrum allocation and scheduling problems in cognitive radio wireless networks with the objectives of ... Keywords: Cognitive radio, Dynamic spectrum access, Fairness, Scheduling, Spectrum allocation

Jian Tang; Satyajayant Misra; Guoliang Xue

2008-08-01T23:59:59.000Z

138

Design techniques for ASK demodulators of passive wireless microsystems: a state-of-the-art review  

Science Conference Proceedings (OSTI)

ASK demodulators are widely used in passive wireless microsystems due to their simple design and low power consumption. Although a large number of ASK demodulators emerged recently, an in-depth examination of the pros and cons and design constraints ... Keywords: ASK demodulators, CMOS circuits, Passive wireless microsystems

Fei Yuan

2010-04-01T23:59:59.000Z

139

An evolutionary framework for routing protocol analysis in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks (WSNs) are widely adopted for applications ranging from surveillance to environmental monitoring. While powerful and relatively inexpensive, they are subject to behavioural faults which make them unreliable. Due to the complex ... Keywords: anomaly detection, evolutionary algorithms, network efficiency, routing protocols, wireless sensor networks

Doina Bucur; Giovanni Iacca; Giovanni Squillero; Alberto Tonda

2013-04-01T23:59:59.000Z

140

Complex Event Detection in Extremely Resource-Constrained Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Complex Events are sequences of sensor measurements indicating interesting or unusual activity in the monitored process. Such events are ubiquitous in a wide range of Wireless Sensor Network (WSN) applications, yet there does not exist a common mechanism ... Keywords: complex event detection, integer techniques, wireless sensor networks

Michael Zoumboulakis; George Roussos

2011-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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

Consolidation of public safety wireless networks: An options-based economic analysis of numerous scenarios  

Science Conference Proceedings (OSTI)

The Korean National Emergency Management Agency proposed to replace existing public safety wireless networks of 46 agencies with a nation-wide consolidated network. This study compares the public-private partnership alternative of sharing a network with ... Keywords: Consolidation, Exploratory modeling, Feasibility study, Public safety wireless network, Public-private partnership, Real option analysis

Sungho Lee

2011-03-01T23:59:59.000Z

142

Market-based resource allocation for distributed data processing in wireless sensor networks  

Science Conference Proceedings (OSTI)

In recent years, improved wireless technologies have enabled the low-cost deployment of large numbers of sensors for a wide range of monitoring applications. Because of the computational resources (processing capability, storage capacity, etc.) collocated ... Keywords: Wireless sensor networks, distributed algorithms, optimization, pricing

Andrew T. Zimmerman; Jerome P. Lynch; Frank T. Ferrese

2013-03-01T23:59:59.000Z

143

A Novel Trust-Aware Geographical Routing Scheme for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are vulnerable to a wide set of security attacks, including those targeting the routing protocol functionality. The applicability of legacy security solutions is disputable (if not infeasible), due to severe restrictions in node ... Keywords: Routing attacks, Secure routing, Security, Trust model, Wireless sensor networks

Theodore Zahariadis; Panagiotis Trakadas; Helen C. Leligou; Sotiris Maniatis; Panagiotis Karkazis

2013-03-01T23:59:59.000Z

144

Implementation Guideline for Wireless Networks and Wireless Equipment Condition Monitoring  

Science Conference Proceedings (OSTI)

The use of wireless technology in industrial settings has undergone significant development. The benefits for its use in the nuclear power industry have motivated several member utilities to undertake significant implementation efforts. This report includes guidance for the implementation of a wireless network within a nuclear power plant, with a secondary emphasis on the use of wireless sensors for asset condition monitoring.

2009-12-23T23:59:59.000Z

145

Cooperative routing in wireless networks  

E-Print Network (OSTI)

In this thesis, we study the problem of energy efficiency and reliability in wireless ad-hoc networks. First, we introduce the idea of wireless cooperation advantage. We formulate the problem of finding the minimum energy ...

Khandani, Amir E. (Amir Ehsan), 1979-

2004-01-01T23:59:59.000Z

146

Wireless Sensor Network Fundamentals  

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

Wireless Sensor Network Fundamentals Wireless Sensor Network Fundamentals Speaker(s): Steven Lanzisera Date: February 8, 2010 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Kevin Kircher Wireless sensor networks have been promising to provide easy data collection and control capability to applications ranging from scientific data collection, disaster recover, national security, and more. The user experience, however, has been filled with confusing terminology, complicated systems, and a lack of interoperability between vendors. Users with a background in the technology and fundamentals are better able to understand system capabilities, make decisions, and end up with a network that meets their needs. Although a sufficient coverage of this topic is at least a semester course, the goal of this talk is to give a brief

147

Wireless Power Transmission  

Office of Scientific and Technical Information (OSTI)

88 88 Lunar Wireless Power Transfer Feasibility Study March 2008 Prof. Zoya Popovic, University of Colorado, Boulder David R. Beckett, Scott R. Anderson, Diana Mann, Stuart Walker, Independent Consultants Sheldon Fried, Ph.D., National Security Technologies, LLC Abstract - This study examines the feasibility of a multi-kilowatt wireless radio frequency (RF) power system to transfer power between lunar base facilities. Initial analyses, show that wireless power transfer (WPT) systems can be more efficient and less expensive than traditional wired approaches for certain lunar and terrestrial applications. The study includes evaluations of the fundamental limitations of lunar WPT systems, the interrelationships of possible operational parameters, and a baseline design approach for a notionial system that could be used in the near

148

Wireless Field Area Network Spectrum Assessment  

Science Conference Proceedings (OSTI)

Utilities are looking for communications technologies that can provide robust support for integration and management of a broad range of Smart Grid applications, starting with advanced distribution management and automation [ADA], distributed energy resources [DERs], advanced metering [AMI], and demand response [DR]. The number and variety of candidate technologies can seem daunting; this EPRI research highlights some core Smart Grid communications requirements and assesses the degree to which systems ba...

2010-12-22T23:59:59.000Z

149

Energy-efficient platform designs for real-world wireless sensing applications  

Science Conference Proceedings (OSTI)

Real-world wireless sensing applications demand system platforms with a wide range of size, cost, power consumption, connectivity, performance, and flexibility requirements. These goals cannot be achieved without understanding the nature of the sensing ...

P. H. Chou; Chulsung Park

2005-05-01T23:59:59.000Z

150

Exploring user perception of wireless campus  

Science Conference Proceedings (OSTI)

The aim of this study is to investigate the perception of a university's wireless student users. The research first identified key factors and indicators that are the determinants of a successful wireless campus and further employed a survey to measure ... Keywords: higher education, legality, mobile communications, reliability, trust, university networks, user perception, user satisfaction, wireless accessibility, wireless campus, wireless networks

J. Michael Tarn; Muhammad A. Razi; Noelle Wiley; Jeffrey Hsu

2007-06-01T23:59:59.000Z

151

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

152

Insecurity of Wireless Networks  

SciTech Connect

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

Sheldon, Frederick T [ORNL; Weber, John Mark [Dynetics, Inc.; Yoo, Seong-Moo [University of Alabama, Huntsville; Pan, W. David [University of Alabama, Huntsville

2012-01-01T23:59:59.000Z

153

Wireless Scheduling Mung Chiang  

E-Print Network (OSTI)

Wireless Scheduling Mung Chiang Electrical Engineering, Princeton University WiOpt Seoul, Korea 2005, Neely Modiano Li 2005, Eryilmaz Srikant 2005, Stolyar 2005, Chen Low Chiang Doyle 2006... · Saturated Joint congestion control and contention control: Wang Kar 2005, Lee Chiang Calderbank 2006, Zhang

Chiang, Mung

154

Ubiquitous Wireless Interworking (UWIN)  

E-Print Network (OSTI)

of Computer Science and Electrical Engineering #12;STA Vision of Future Home Network Everything radiates generation wireless infrastructure? Must lower costs for service providers throughout the life-cycle (install workload models at several levels Study basic usage Study patterns ... #12;SIP-MIPv6 Interworking SIP

Gruner, Daniel S.

155

Miniaturized wireless sensor network  

E-Print Network (OSTI)

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

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

2010-01-01T23:59:59.000Z

156

A learning automata based scheduling solution to the dynamic point coverage problem in wireless sensor networks  

Science Conference Proceedings (OSTI)

The dynamic point coverage problem in wireless sensor networks is to detect some moving target points in the area of the network using as few sensor nodes as possible. One way to deal with this problem is to schedule sensor nodes in such a way that a ... Keywords: Dynamic point coverage, Learning automata, Scheduling, Wireless sensor network

M. Esnaashari; M. R. Meybodi

2010-10-01T23:59:59.000Z

157

A Self-Adaptive Spectrum Management Middleware for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

The vision of the Internet of Things, wherein everyday objects are embedded with smart wireless sensor devices, is making these sensor devices increasingly pervasive. As the density of their deployment in overlapping or adjacent areas increases, the ... Keywords: Mediaaccess control, Spectrum management, Wireless sensor networks

Robert Thompson; Gang Zhou; Lei Lu; Sudha Krishnamurthy; Hover Dong; Xin Qi; Yantao Li; Matthew Keally; Zhen Ren

2013-01-01T23:59:59.000Z

158

QoS supporting and optimal energy allocation for a cluster based wireless sensor network  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) have become a very active and important area of research due to their potential in civil and military applications. A lot of research works focus on energy efficient routing protocols due to the limited energy of battery-powered ... Keywords: Clustering, Data loss rate, Optimal energy allocation, QoS, Source-to-sink delay, Wireless sensor network

Shensheng Tang; Wei Li

2006-08-01T23:59:59.000Z

159

Composite quality of service and decision making perspectives in wireless networks  

Science Conference Proceedings (OSTI)

Supporting quality of service (QoS) in wireless networks has been a very rich and interesting area of research. Many significant advances have been made in supporting QoS in single wireless networks. However, the support for the QoS across multiple heterogeneous ... Keywords: Composite quality of service, Decisions, Quality of service

Punit Ahluwalia; Upkar Varshney

2009-01-01T23:59:59.000Z

160

A CAN/IEEE 802.11b wireless Lan local bridge design  

Science Conference Proceedings (OSTI)

Employing CAN in distributed real-time control applications sometimes critically requires increasing the size of distributed area, and communication with both other LANs and independent CAN segments. An interworking device with wireless support to extend ... Keywords: CAN, IEEE 802.11b WLAN, Wireless Interworking Unit

Cuneyt Bayilmis; Ismail Erturk; Celal Ceken; Ibrahim Ozcelik

2008-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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

Anomaly detection using self-organizing map and wavelets in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks (WSNs) have been developed and extensively applied in agriculture monitoring to monitor and collect various physical attributes within a specific area or environment of interest. Data readings from the sensors may be abnormal ... Keywords: agriculture monitoring, anomaly detection, discrete wavelet transform, self-organizing map, wavelets, wireless sensor networks

Supakit Siripanadorn; Wipawee Hattagam; Neung Teaumroong

2010-10-01T23:59:59.000Z

162

Anomaly detection in wireless sensor networks using self-organizing map and wavelets  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks (WSNs) have been applied in agriculture monitoring to monitor and collect various physical attributes within a specific area. It is important to detect data anomalies to determine a suitable course of action. The underlying aim ... Keywords: agriculture monitoring, anomaly detection, discrete wavelet transform, self-organizing map, wavelets, wireless sensor networks

Supakit Siripanadorn; Wipawee Hattagam; Neung Teaumroong

2010-10-01T23:59:59.000Z

163

A study on distributed/centralized scheduling for wireless mesh network  

Science Conference Proceedings (OSTI)

The IEEE 802.16 standard proposes the Media Access Control (MAC) protocol for the Wireless Metropolitan Area Network (WMAN). Two transmission modes are defined in the IEEE 802.16, including Point-to-Multipoint (PMP) mode and mesh ... Keywords: 802.16, mesh, performance, scheduling, wireless

Shin-Ming Cheng; Phone Lin; Di-Wei Huang; Shun-Ren Yang

2006-07-01T23:59:59.000Z

164

Energy Balancing Intrusion Detection System in Wireless Sensor Network  

Science Conference Proceedings (OSTI)

wireless sensor network (WSN) is vulnerable to a wide range of attacks due to deployment in the hostile ervironment and having limited resources. The security of WSN becomes a very important issue with the rapid development of WSN. Instrusion detection ... Keywords: WSN, Energy-effiency, Clustering, IDS

Chunyan Peng; Bing Liu

2012-10-01T23:59:59.000Z

165

Improving broadcast efficiency in wireless sensor network time synchronization protocols  

Science Conference Proceedings (OSTI)

In this work we proposed an algorithm to allow nodes in a wireless sensor network to interconnect in a way such that time stamp information can be efficiently distributed for network wide synchronization. The algorithm works by first establishing a level ... Keywords: broadcast optimization, sensor networks, time synchronization

Wenxun Huang; Yujuan Quan; Deming Chen

2012-06-01T23:59:59.000Z

166

Protecting the sink location privacy in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) are widely deployed to collect data in military and civilian applications today. Due to the open nature of a WSN, it is relatively easy for an adversary to eavesdrop and trace packets in order to capture the receiver. ... Keywords: Location privacy, Receiver, Sink, WSN

Lin Yao, Lin Kang, Pengfei Shang, Guowei Wu

2013-06-01T23:59:59.000Z

167

Supporting vehicular mobility in urban multi-hop wireless networks  

Science Conference Proceedings (OSTI)

Deployments of city-wide multi-hop 802.11 networks introduce challenges for maintaining client performance at vehicular speeds. We experimentally demonstrate that current network interfaces employ policies that result in long outage durations, even when ... Keywords: ap quality scoring, differential capacity handoff, handoff timescale, mesh, roaming, throughput outage, urban, vehicular, wireless

Anastasios Giannoulis; Marco Fiore; Edward W. Knightly

2008-06-01T23:59:59.000Z

168

Understanding Wireless: Digital Mobile, Cellular and PCS  

Science Conference Proceedings (OSTI)

From the Publisher:This text covers wireless communications fundamentals, including wireless network architecture, network components, and wireless call processing. The bulk of the book, however, involves the discussion of major enabling technologies ...

Ming-Chwan Chow

1998-05-01T23:59:59.000Z

169

Efficient Wide Area Data Transfer Protocols  

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

stood the challenges presented by their extraordinary instru- ment in terms of data generation, distribution, and analysis. Many other research disciplines are now facing the...

170

Wide Area Wind Field Monitoring Status & Results  

DOE Green Energy (OSTI)

Volume-scanning elastic has been investigated as a means to derive 3D dynamic wind fields for characterization and monitoring of wind energy sites. An eye-safe volume-scanning lidar system was adapted for volume imaging of aerosol concentrations out to a range of 300m. Reformatting of the lidar data as dynamic volume images was successfully demonstrated. A practical method for deriving 3D wind fields from dynamic volume imagery was identified and demonstrated. However, the natural phenomenology was found to provide insufficient aerosol features for reliable wind sensing. The results of this study may be applicable to wind field measurement using injected aerosol tracers.

Alan Marchant; Jed Simmons

2011-09-30T23:59:59.000Z

171

Wireless Charging System for Electric Vehicles  

Technology Summary ORNL researchers have made wireless power transfer more efficient by using an air core ... communication system in the wireless charging apparatus.

172

Wireless Temperature Sensors for Improved HVAC Control  

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

reliable, and affordable and affordable Wireless Temperature Sensors for Improved HVAC Control An assessment of wireless sensor technology Executive Summary This Technology...

173

Battery Wireless Solutions Inc | Open Energy Information  

Open Energy Info (EERE)

Data Page Edit with form History Share this page on Facebook icon Twitter icon Battery Wireless Solutions Inc Jump to: navigation, search Name Battery & Wireless Solutions...

174

Capacity consideration of wireless ad hoc networks  

E-Print Network (OSTI)

Capacity ProblemCurrent Research on Capacity of Wireless Ad HocChapter 3 Upper Bound on the Capacity of Wireless Ad Hoc

Tan, Yusong

2008-01-01T23:59:59.000Z

175

Wireless Roadside Inspection Field Operations.pub  

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

Field Operational Test (FOT) Field Operational Test (FOT) Oak Ridge National Laboratory managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract number DE-AC05-00OR22725 Research Areas Freight Flows Passenger Flows Supply Chain Efficiency Transportation: Energy Environment Safety Security Vehicle Technologies Research Brief T he U.S. Department of Transportation (DOT) Federal Motor Carrier Safety Administration (FMCSA) has commissioned the Wireless Roadside Inspection (WRI) Program to validate technologies and methodologies that can improve safety through inspections using wireless technologies that convey real-time identification of commercial vehicles, drivers, and carriers, as well as information about the status of the vehicles and their drivers. It is hypothesized that

176

Wireless boundary monitor system and method  

DOE Patents (OSTI)

A wireless boundary monitor system used to monitor the integrity of a boundary surrounding an area uses at least two housings having at least one transmitting means for emitting ultrasonic pressure waves to a medium. Each of the housings has a plurality of receiving means for sensing the pressure waves in the medium. The transmitting means and the receiving means of each housing are aimable and communicably linked. At least one of the housings is equipped with a local alarm means for emitting a first alarm indication whereby, when the pressure waves propagating from a transmitting means to a receiving means are sufficiently blocked by an object a local alarm means or a remote alarm means or a combination thereof emit respective alarm indications. The system may be reset either manually or automatically. This wireless boundary monitor system has useful applications in both indoor and outdoor environments.

Haynes, Howard D. (Knoxville, TN); Ayers, Curtis W. (Kingston, TN)

1997-01-01T23:59:59.000Z

177

Lunar Wireless Power Transfer Feasibility Study  

Science Conference Proceedings (OSTI)

This study examines the feasibility of a multi-kilowatt wireless radio frequency (RF) power system to transfer power between lunar base facilities. Initial analyses, show that wireless power transfer (WPT) systems can be more efficient and less expensive than traditional wired approaches for certain lunar and terrestrial applications. The study includes evaluations of the fundamental limitations of lunar WPT systems, the interrelationships of possible operational parameters, and a baseline design approach for a notionial system that could be used in the near future to power remote facilities at a lunar base. Our notional system includes state-of-the-art photovoltaics (PVs), high-efficiency microwave transmitters, low-mass large-aperture high-power transmit antennas, high-efficiency large-area rectenna receiving arrays, and reconfigurable DC combining circuitry.

Sheldon Freid, et al.

2008-06-01T23:59:59.000Z

178

Wireless boundary monitor system and method  

DOE Patents (OSTI)

A wireless boundary monitor system used to monitor the integrity of a boundary surrounding an area uses at least two housings having at least one transmitting means for emitting ultrasonic pressure waves to a medium. Each of the housings has a plurality of receiving means for sensing the pressure waves in the medium. The transmitting means and the receiving means of each housing are aimable and communicably linked. At least one of the housings is equipped with a local alarm means for emitting a first alarm indication whereby, when the pressure waves propagating from a transmitting means to a receiving means are sufficiently blocked by an object a local alarm means or a remote alarm means or a combination thereof emit respective alarm indications. The system may be reset either manually or automatically. This wireless boundary monitor system has useful applications in both indoor and outdoor environments. 4 figs.

Haynes, H.D.; Ayers, C.W.

1997-12-09T23:59:59.000Z

179

MARGINAL EXPENSE OIL WELL WIRELESS SURVEILLANCE MEOWS  

SciTech Connect

A marginal expense oil well wireless surveillance system to monitor system performance and production from rod-pumped wells in real time from wells operated by Vaquero Energy in the Edison Field, Main Area of Kern County in California has been successfully designed and field tested. The surveillance system includes a proprietary flow sensor, a programmable transmitting unit, a base receiver and receiving antenna, and a base station computer equipped with software to interpret the data. First, the system design is presented. Second, field data obtained from three wells is shown. Results of the study show that an effective, cost competitive, real-time wireless surveillance system can be introduced to oil fields across the United States and the world.

Mason M. Medizade; John R. Ridgely; Donald G. Nelson

2004-11-01T23:59:59.000Z

180

Mobility in Wireless Sensor Networks  

E-Print Network (OSTI)

the 802.15.4 radio (for wireless operation) as well as thewireless sensor network protocol, significant power can be saved during network operations.

Mehta, Ankur Mukesh

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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.


181

Attacking Automatic Wireless Network Selection  

E-Print Network (OSTI)

Wireless 802.11 networking is becoming so prevalent that many users have become accustomed to having available wireless networks in their workplace, home, and many public places such as airports and coffee shops. Modern client operating systems implement automatic wireless network discovery and known network identification to facilitate wireless networking for the end-user. In order to implement known network discovery, client operating systems remember past wireless networks that have been joined and automatically look for these networks (referred to as Preferred or Trusted Networks) whenever the wireless network adapter is enabled. By examining these implementations in detail, we have discovered previously undisclosed vulnerabilities in the implementation of these algorithms under the two most prevalent client operating systems, Windows XP and MacOS X. With custom base station software, an attacker may cause clients within wireless radio range to associate to the attacker’s wireless network without user interaction or notification. This will occur even if the user has never connected to a wireless network before or they have an empty Preferred/Trusted Networks List. We describe these vulnerabilities as well as their implementation and impact. 1

Dino A. Dai Zovi; Shane A. Macaulay

2005-01-01T23:59:59.000Z

182

Security for wireless sensor networks  

Science Conference Proceedings (OSTI)

This chapter identifies the vulnerabilities associated with the operational paradigms currently employed by Wireless Sensor Networks. A survey of current WSN security research is presented. The security issues of Mobile Ad-Hoc Networks and infrastructure ... Keywords: WSN, security, sensor networks, wireless

Sasikanth Avancha; Jeffrey Undercoffer; Anupam Joshi; John Pinkston

2004-01-01T23:59:59.000Z

183

Wireless Robotics: Opportunities and Challenges  

Science Conference Proceedings (OSTI)

Wireless robotics is one of the emerging fields in the world of automation. In-spite of research and standardization efforts around the world, the definition of the term "Robot" is still evolving. Robots have found application in many domains including ... Keywords: Mobile robotics, Standardization, Wireless robotics

Sivabalan Arumugam; Ritesh Kumar Kalle; Anand R. Prasad

2013-06-01T23:59:59.000Z

184

Wireless scheduling with power control  

Science Conference Proceedings (OSTI)

We consider the scheduling of arbitrary wireless links in the physical model of interference to minimize the time for satisfying all requests. We study here the combined problem of scheduling and power control, where we seek both an assignment of power ... Keywords: Wireless networks, capacity, radio interference, scheduling

Magnús M. Halldórsson

2012-12-01T23:59:59.000Z

185

Pervasive healthcare and wireless health monitoring  

Science Conference Proceedings (OSTI)

With an increasingly mobile society and the worldwide deployment of mobile and wireless networks, the wireless infrastructure can support many current and emerging healthcare applications. This could fulfill the vision of "Pervasive Healthcare" or healthcare ... Keywords: ad hoc wireless networks, healthcare applications, location management, mobile and wireless networks, pervasive

Upkar Varshney

2007-03-01T23:59:59.000Z

186

Adaptive Scheduling in Ad Hoc and Cellular Wireless Networks  

E-Print Network (OSTI)

Under unicast operations in wireless cellular networks, wetransmission operations in cellular wireless networks. Underoperation for failovers under heterogeneous traffic loading conditions in wireless

Tan, Choo Chin

2013-01-01T23:59:59.000Z

187

An efficient multi-channel wireless switching system  

E-Print Network (OSTI)

the scheduling operation in wireless switching systems. Thefor the local operation between a wireless switch port andoperations in interference-rich multi-channel wireless

Shim, Jaewook

2010-01-01T23:59:59.000Z

188

Joint Routing and Scheduling in Multi-hop Wireless Networks with Directional Antennas  

E-Print Network (OSTI)

Long-distance multi-hop wireless networks have been used in recent years to provide connectivity to rural areas. The salient features of such networks include TDMA channel access, nodes with multiple radios, and point-to-point ...

Dutta, Partha

189

Assessment framework for wireless V2V communication-based ITS applications  

E-Print Network (OSTI)

Inter-vehicle communication enabled by wireless technology is an emerging area of Intelligent Transportation Systems (ITS). This technology has generated great interest among automobile manufacturers and ITS researchers ...

Rajiwade, Swapnil Shankar

2011-01-01T23:59:59.000Z

190

Proactive mobile wireless networks : an infrastructureless wireless network architecture for delay-sensitive applications  

E-Print Network (OSTI)

Infrastructureless wireless networks are an important class of wireless networks that is best suited for scenarios where there is temporary and localized telecommunication demand. Such networks consist of wireless devices ...

Dai, Lillian Lei, 1978-

2008-01-01T23:59:59.000Z

191

Fault tolerance in ZigBee wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSN) based on the IEEE 802.15.4 Personal Area Network standard are finding increasing use in the home automation and emerging smart energy markets. The network and application layers, based on the ZigBee 2007 PRO Standard, provide ...

Richard Alena; Ray Gilstrap; Jarren Baldwin; Thom Stone; Pete Wilson

2011-03-01T23:59:59.000Z

192

Solar-Aware clustering in wireless sensor networks  

E-Print Network (OSTI)

Energy conservation plays a crucial in wireless sensor networks since such networks are designed to be placed in hostile and non-accessible areas. While battery-driven sensors will run out of battery sooner or later, the use of renewable energy sources such as solar power or gravitation may extend the lifetime of a sensor network. We propose to utilize solar power in wireless sensor networks and extend LEACH a well-known cluster-based protocol for sensor networks to become solar-aware. The presented simulation results show that making LEACH solar-aware significantly extends the lifetime of sensor networks. 1

Thiemo Voigt; Hartmut Ritter

2004-01-01T23:59:59.000Z

193

A Key-Distribution Scheme for Wireless Home Automation Networks  

E-Print Network (OSTI)

Wireless home automation networks are one example of how wireless technologies may soon become part of our daily life, yet security in existing products is woefully inadequate. An important problem in this area is the question of secure key distribution. In this paper we present a key-distribution scheme geared towards home automation networks, but applicable to other networks with related properties as well. Our approach uses a decentralized scheme that is designed to work on resource-poor devices, allows easy addition and removal of devices and limits the workload on the end user while guaranteeing the secrecy of the exchanged keys even in the presence of subverted nodes.

Arno Wacker; Timo Heiber; Holger Cermann

2004-01-01T23:59:59.000Z

194

Towards Embedded Wireless-Networked Intelligent Daylighting Systems for Commercial Buildings  

E-Print Network (OSTI)

Energy efficient office lighting systems can save 40% in electricity consumption in areas that receive significant amounts of daylight. In spite of the savings they can generate, daylighting systems are not widely used in the commercial office building. Barriers prohibiting adoption include high retrofitting costs, and difficulty estimating and maintaining worksurface illuminances. In this paper, an intelligent control framework that utilizes MEMS-based (micro-electro-mechanical systems) ‘Smart Dust motes’ wireless platforms is explored. Due to their small size, they can be placed directly on the worksurface. As a result, illuminance estimation and maintenance is significantly improved. Furthermore, motes functioning as actuators can be interfaced with dimming ballasts without the need to rewire the building, enabling less expensive, less disruptive retrofitting of commercial buildings.

Yao-Jung Wen; et al.

2006-01-01T23:59:59.000Z

195

Biomonitoring with Wireless Communications  

SciTech Connect

This review is divided into three sections: technologies for monitoring physiological parameters; biosensors for chemical assays and wireless communications technologies including image transmissions. Applications range from monitoring high risk patients for heart, respiratory activity and falls to sensing levels of physical activity in military, rescue, and sports personnel. The range of measurements include, heart rate, pulse wave form, respiratory rate, blood oxygen, tissue pCO2, exhaled carbon dioxide and physical activity. Other feasible measurements will employ miniature chemical laboratories on silicon or plastic chips. The measurements can be extended to clinical chemical assays ranging from common blood assays to protein or specialized protein measurements (e.g., troponin, creatine, and cytokines such as TNF and IL6). Though the feasibility of using wireless technology to communicate vital signs has been demonstrated 32 years ago (1) it has been only recently that practical and portable devices and communications net works have become generally available for inexpensive deployment of comfortable and affordable devices and systems.

Budinger, Thomas F.

2003-03-01T23:59:59.000Z

196

Routing Security Issues in Wireless Sensor Networks: Attacks and Defenses  

E-Print Network (OSTI)

Wireless Sensor Networks (WSNs) are rapidly emerging as an important new area in wireless and mobile computing research. Applications of WSNs are numerous and growing, and range from indoor deployment scenarios in the home and office to outdoor deployment scenarios in adversary's territory in a tactical battleground (Akyildiz et al., 2002). For military environment, dispersal of WSNs into an adversary's territory enables the detection and tracking of enemy soldiers and vehicles. For home/office environments, indoor sensor networks offer the ability to monitor the health of the elderly and to detect intruders via a wireless home security system. In each of these scenarios, lives and livelihoods may depend on the timeliness and correctness of the sensor data obtained from dispersed sensor nodes. As a result, such WSNs must be secured to prevent an intruder from obstructing the delivery of correct sensor data and from forging sensor data. To address the latter problem, end-to-end data integrity checksums and pos...

Sen, Jaydip

2011-01-01T23:59:59.000Z

197

In-kernel passive measurement of the performance impact of hidden terminals in 802.11 wireless networks  

Science Conference Proceedings (OSTI)

The negative performance impact of the presence of hidden terminals in wireless networks has been well know for decades. Despite much research in the area, many deployed networks continue to suffer a performance penalty because of hidden terminals. Ad ... Keywords: 802.11, hidden terminal collisions, passive measurement, wireless networks

Scott M. Raynel; Tony J. McGregor

2011-11-01T23:59:59.000Z

198

New Report on NIST Tests of Wireless Environment in Auto ...  

Science Conference Proceedings (OSTI)

... key parameters that describe the wireless propagation environment, which will be ... of wireless equipment used in highly reflective environments. ...

2011-04-26T23:59:59.000Z

199

Selecting forwarding neighbors in wireless ad hoc networks  

E-Print Network (OSTI)

networking operation in wireless ad hoc networks. It isa fundamental operation which is frequent in wireless ad hoc

Calinescu, G; Mandoiu, Ion I; Wan, P J; Zelikovsky, A Z

2004-01-01T23:59:59.000Z

200

Energy Solutions Using Wireless Telemetry  

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

Solutions Using Wireless Telemetry Solutions Using Wireless Telemetry Speaker(s): Andy Green Date: June 12, 2001 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Satkartar K. Kinney This talk will address the following: * Introduction to wireless data networks * What are cellular control channels and why do I care? * Telemetry using wireless short packet data * Aeris technologies * Energy applications - Automatic meter reading - HVAV-R monitoring and control - Home gateways and remote thermostat control - Load management and curtailment - Distribution automation - Supply monitoring/management * The future For more information on this topic, you're invited to visit Aeris.Net at: http://www.aeris.net For more information about this seminar, please contact: Satkartar Kinney(510) 495-2365

Note: This page contains sample records for the topic "wide area wireless" 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

Embracing interference in wireless systems  

E-Print Network (OSTI)

The wireless medium is a shared resource. If nearby devices transmit at the same time, their signals interfere, resulting in a collision. In traditional networks, collisions cause the loss of the transmitted information. ...

Gollakota, Shyamnath (Shyamnath Venkata Satyasrisai)

2013-01-01T23:59:59.000Z

202

Simulating networks of wireless sensors  

Science Conference Proceedings (OSTI)

Recent advances in low-power embedded processors, radios, and micro-mechanical systems (MEMs) have made possible the development of networks of wirelessly interconnected sensors. With their focus on applications requiring tight coupling with the physical ...

Sung Park; Andreas Savvides; Mani B. Srivastava

2001-12-01T23:59:59.000Z

203

Connectivity problem in wireless networks  

Science Conference Proceedings (OSTI)

We study the complexity of the following connectivity problem in wireless networks: for a given placement of n nodes in the plane, the goal is to compute a channel and power assignment that forms strongly connected communication structure spanning ...

Dariusz R. Kowalski; Mariusz A. Rokicki

2010-09-01T23:59:59.000Z

204

Wireless Everything - Unwiring the World  

Science Conference Proceedings (OSTI)

Wirelessness and radio technologies have been at the heart of many disruptive businesses and activities. This paper argues that this trend will continue as new research topics and novel ways to use existing techniques have an impact on both business ...

R. Mannings; G. Cosier

2001-10-01T23:59:59.000Z

205

A survey on wireless sensor network infrastructure for agriculture  

Science Conference Proceedings (OSTI)

The hybrid wireless sensor network is a promising application of wireless sensor networking techniques. The main difference between a hybrid WSN and a terrestrial wireless sensor network is the wireless underground sensor network, which communicates ... Keywords: Agriculture, Hybrid wireless sensor network, Information collection, Monitoring, Wireless underground sensor network

Xiaoqing Yu; Pute Wu; Wenting Han; Zenglin Zhang

2013-01-01T23:59:59.000Z

206

Wireless Connectivity for Electric Substations  

Science Conference Proceedings (OSTI)

The information age has seen the advent of low-cost, reliable wireless networking technologies, originally developed for information technology (IT) applications. Control system and IT vendors and equipment are converging at a rapid rate. Today there is a plethora of wireless connectivity solutions for various control system components. As always, the goal of a control system security process is to balance security while operating the control system within resource limits. This report identifies and eval...

2008-01-31T23:59:59.000Z

207

Wireless System Considerations When Implementing NERC Critical  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wireless System Considerations When Implementing NERC Critical Wireless System Considerations When Implementing NERC Critical Infrastructure Protection Standards Wireless System Considerations When Implementing NERC Critical Infrastructure Protection Standards Energy asset owners are facing a monumental challenge as they address compliance with the North American Electric Reliability Corporation (NERC) Critical Infrastructure Protection (CIP) Standards (CIP-002 through CIP-009). The increased use of wireless technologies and their introduction into control center networks and field devices compound this challenge, as ambiguity exists regarding the applicability of the CIP requirements to wireless networking technologies. Wireless System Considerations When Implementing NERC Critical Infrastructure Protection Standards More Documents & Publications

208

Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly: Connecting the World Wirelessly  

Science Conference Proceedings (OSTI)

Welcome to the ACM International Wireless Communications and Mobile Computing Conference (IWCMC 2009) with the theme this year of "Connecting the world wirelessly." This year's Conference continues its tradition of being the premier forum for presentation ...

Mohsen Guizani; Peter Mueller; Klaus-Peter Fähnrich; Athanasios (Thanos) Vasilakos; Yan Zhang; Jun Zhang

2009-06-01T23:59:59.000Z

209

Wireless sensor networks: A survey on the state of the art and the 802.15.4 and ZigBee standards  

Science Conference Proceedings (OSTI)

Wireless sensor networks are an emerging technology for low-cost, unattended monitoring of a wide range of environments. Their importance has been enforced by the recent delivery of the IEEE 802.15.4 standard for the physical and MAC layers and the forthcoming ... Keywords: IEEE 802.15.4, Wireless sensor networks, ZigBee

Paolo Baronti; Prashant Pillai; Vince W. C. Chook; Stefano Chessa; Alberto Gotta; Y. Fun Hu

2007-05-01T23:59:59.000Z

210

Strategies and Challenges for Interconnecting Wireless Mesh and Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks and wireless mesh networks are popular research subjects. The interconnection of both network types enables next-generation applications and creates new optimization opportunities. However, current single-gateway solutions are ... Keywords: Cooperation strategies, Future networks, Wireless mesh network, Wireless sensor network

Stefan Bouckaert; Eli De Poorter; Benôit Latré; Jeroen Hoebeke; Ingrid Moerman; Piet Demeester

2010-05-01T23:59:59.000Z

211

A Survey of Attacks, Security Mechanisms and Challenges in Wireless Sensor Networks  

E-Print Network (OSTI)

Wireless Sensor networks (WSN) is an emerging technology and have great potential to be employed in critical situations like battlefields and commercial applications such as building, traffic surveillance, habitat monitoring and smart homes and many more scenarios. One of the major challenges wireless sensor networks face today is security. While the deployment of sensor nodes in an unattended environment makes the networks vulnerable to a variety of potential attacks, the inherent power and memory limitations of sensor nodes makes conventional security solutions unfeasible. The sensing technology combined with processing power and wireless communication makes it profitable for being exploited in great quantity in future. The wireless communication technology also acquires various types of security threats. This paper discusses a wide variety of attacks in WSN and their classification mechanisms and different securities available to handle them including the challenges faced.

Padmavathi, Dr G

2009-01-01T23:59:59.000Z

212

Communications device identification methods, communications methods, wireless communications readers, wireless communications systems, and articles of manufacture  

DOE Patents (OSTI)

Communications device identification methods, communications methods, wireless communications readers, wireless communications systems, and articles of manufacture are described. In one aspect, a communications device identification method includes providing identification information regarding a group of wireless identification devices within a wireless communications range of a reader, using the provided identification information, selecting one of a plurality of different search procedures for identifying unidentified ones of the wireless identification devices within the wireless communications range, and identifying at least some of the unidentified ones of the wireless identification devices using the selected one of the search procedures.

Steele, Kerry D [Kennewick, WA; Anderson, Gordon A [Benton City, WA; Gilbert, Ronald W [Morgan Hill, CA

2011-02-01T23:59:59.000Z

213

Home Area Networks and the Smart Grid  

Science Conference Proceedings (OSTI)

With the wide array of home area network (HAN) options being presented as solutions to smart grid challenges for the home, it is time to compare and contrast their strengths and weaknesses. This white paper examines leading and emerging HAN technologies. The emergence of the smart grid is bringing more networking players into the field. The need for low consistent bandwidth usage differs enough from the traditional information technology world to open the door to new technologies. The predominant players currently consist of a blend of the old and new. Within the wired world Ethernet and HomePlug Green PHY are leading the way with an advantage to HomePlug because it doesn't require installing new wires. In the wireless the realm there are many more competitors but WiFi and ZigBee seem to have the most momentum.

Clements, Samuel L.; Carroll, Thomas E.; Hadley, Mark D.

2011-04-01T23:59:59.000Z

214

Mutual Exclusion on Multihop, Mobile Wireless Networks  

Science Conference Proceedings (OSTI)

The system considered in this paper is a mobile wireless network, commonly known as an ad hoc network. Mobile nodes in this dynamic topology function both as processors and routers to provide communication between nodes which are not within wireless ...

Jennifer Walter; Savita Kini

1997-12-01T23:59:59.000Z

215

Wilis: Architectural Modeling of Wireless Systems  

E-Print Network (OSTI)

The performance of a wireless system depends on the wireless channel as well as the algorithms used in the transceiver pipelines. Because physical phenomena affect transceiver pipelines in difficult to predict ways, detailed ...

Fleming, Kermin Elliott

216

Distributed computation in wireless and dynamic networks  

E-Print Network (OSTI)

Today's wireless networks tend to be centralized: they are organized around a fixed central backbone such as a network of cellular towers or wireless access points. However, as mobile computing devices continue to shrink ...

Oshman, Rotei

2012-01-01T23:59:59.000Z

217

Energy and quality scalable wireless communication  

E-Print Network (OSTI)

Nodes for emerging, high-density wireless networks will face the dual challenges of continuous, multi-year operation under diverse and challenging operating conditions. The wireless communication subsystem, a substantial ...

Min, Rex K. (Rex Kee), 1976-

2003-01-01T23:59:59.000Z

218

A platform for wireless networked transducers  

Science Conference Proceedings (OSTI)

As computers, sensors, and wireless communication have become smaller, cheaper, and more sophisticated, wireless transducer platforms have become a focus of research and commercial interest. This report describes an investigation into such platforms. ...

Bernard Horan; Bill Bush; John Nolan; David Cleal

2007-03-01T23:59:59.000Z

219

Wireless Instrumentation of Aluminum Smelting Operatings  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2010 TMS Annual Meeting & Exhibition. Symposium , Jim Evans Honorary Symposium. Presentation Title, Wireless Instrumentation ...

220

NIST Public Safety Wireless Technology Links  

Science Conference Proceedings (OSTI)

... Wireless Alliance (EWA) Fire and Emergency Manufacturers and Services Assn. ... AUTOMATIC VEHICLE LOCATION (AVL), E-911, and LOCATION ...

Note: This page contains sample records for the topic "wide area wireless" 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

QOMB: A wireless network emulation testbed  

Science Conference Proceedings (OSTI)

In this paper we present QOMB, a testbed we designed and implemented for the evaluation of wireless network systems, protocols and applications. The testbed uses the wireless network emulation set of tools QOMET so as to reproduce in a wired network, ... Keywords: emulation, real-time, testbed, wireless networks

Razvan Beuran; Lan Tien Nguyen; Toshiyuki Miyachi; Junya Nakata; Ken-ichi Chinen; Yasuo Tan; Yoichi Shinoda

2009-11-01T23:59:59.000Z

222

Hierarchical Routing over Dynamic Wireless Networks  

E-Print Network (OSTI)

Wireless network topologies change over time and maintaining routes requires frequent updates. Updates are costly in terms of consuming throughput available for data transmission, which is precious in wireless networks. In this paper, we ask whether there exist low-overhead schemes that produce low-stretch routes. This is studied by using the underlying geometric properties of the connectivity graph in wireless networks.

Tschopp, Dominique; Grossglauser, Matthias

2009-01-01T23:59:59.000Z

223

UConnect Wireless Connection Windows 7 Configuration  

E-Print Network (OSTI)

UConnect Wireless Connection Windows 7 Configuration page 1 revised February, 2012 Configuring a UConnect Wireless Connection on Windows 7 1. Open the Network and Sharing Center a. Click the Windows icon screen, select Network and Sharing Center. #12;UConnect Wireless Connection Windows 7 Configuration page

Provancher, William

224

Wireless sensor networks and human comfort index  

Science Conference Proceedings (OSTI)

Conventional wireless home automation networks (WHANs) incorporate embedded wireless sensors and actuators that monitors and control home living environment. WHAN's primary goal is to maintain user comfort and efficient home management. Conventional ... Keywords: Ambient intelligence, Fuzzy logic, Human comfort, Wireless sensor network

Mohd Izani Rawi, Adnan Al-Anbuky

2013-06-01T23:59:59.000Z

225

Wireless sensor networks for soil science  

Science Conference Proceedings (OSTI)

Wireless sensor networks can revolutionise soil ecology by providing measurements at temporal and spatial granularities previously impossible. This paper presents our first steps towards fulfilling that goal by developing and deploying two experimental ... Keywords: WSNs, environmental monitoring, soil moisture, soil monitoring, soil science, soil temperature, urban forests, web services, wireless networks, wireless sensor networks

Andreas Terzis; Razvan Musaloiu-E.; Joshua Cogan; Katalin Szlavecz; Alexander Szalay; Jim Gray; Stuart Ozer; Chieh-Jan Mike Liang; Jayant Gupchup; Randal Burns

2010-02-01T23:59:59.000Z

226

Power Saving Techniques for Wireless LANs  

E-Print Network (OSTI)

Fast wireless access has rapidly become commonplace. Wireless access points and Hotspot servers are sprouting everywhere. Battery lifetime continues to be a critical issue in mobile computing. This paper first gives an overview of WLAN energy saving strategies, followed by an illustration of a system-level methodology for saving power in heterogeneous wireless environments.

Simunic, T

2011-01-01T23:59:59.000Z

227

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

228

Energy Management in Wireless Sensor Network Operations  

E-Print Network (OSTI)

In this dissertation, we develop and analyze effective energy management policies for wireless sensor networks in emerging applications. Existing methods in this area have primarily focused on energy conservation through the use of various communication techniques. However, in most applications of wireless sensor networks, savings in energy come at the expense of several performance parameters. Therefore it is necessary to manage energy consumption while being conscious of its effects on performance. In most cases, such energy-performance issues are specific to the nature of the application. Our research has been motivated by new techniques and applications where efficient energy-performance trade-off decisions are required. We primarily study the following trade-off cases: energy and node replacement costs (Case I), energy and delay (Case II), and energy and availability (Case III). We consider these trade-off situations separately in three distinct problem scenarios. In the first problem (Case I), we consider minimizing energy and node replacement costs in underwater wireless sensor networks for seismic monitoring application. In this case, we introduce mixed-integer programming (MIP) formulations based on a combined routing and node replacement policy approach and develop effective policies for large problem instances where our MIP models are intractable. In the second problem (Case II), we develop a Markov decision process (MDP) model to manage energy-delay trade-off in network coding which is a new energy-saving technique for wireless networks. Here we derive properties of the optimal policy and develop in- sights into other simple policies that are later shown to be efficient in particular situations. In the third problem (Case III), we consider an autonomous energy harvesting sensor network where nodes are turned off from time to time to operate in an “energy-neutral” manner. In this case, we use stochastic fluid-flow analysis to evaluate and analyze the availability of the sensor nodes under effective energy management policies. In each of the above problem cases, we develop analytical formulations, and derive and/or analyze policies that effectively manage the considered energy-performance trade-off. Overall, our analyses and solution methods make new contributions to both operations research and communication networking literature.

Mohapatra, Arupa Kumar

2013-08-01T23:59:59.000Z

229

WIRELESS FOR A NUCLEAR FACILITY  

SciTech Connect

The introduction of wireless technology into a government site where nuclear material is processed and stored brings new meaning to the term ''harsh environment''. At SRNL, we are attempting to address not only the harsh RF and harsh physical environment common to industrial facilities, but also the ''harsh'' regulatory environment necessitated by the nature of the business at our site. We will discuss our concepts, processes, and expected outcomes in our attempts to surmount the roadblocks and reap the benefits of wireless in our ''factory''.

Shull, D; Joe Cordaro, J

2007-03-28T23:59:59.000Z

230

WIRELESS FOR A NUCLEAR FACILITY  

SciTech Connect

The introduction of wireless technology into a government site where nuclear material is processed and stored brings new meaning to the term ''harsh environment''. At SRNL, we are attempting to address not only the harsh RF and harsh physical environment common to industrial facilities, but also the ''harsh'' regulatory environment necessitated by the nature of the business at our site. We will discuss our concepts, processes, and expected outcomes in our attempts to surmount the roadblocks and reap the benefits of wireless in our ''factory''.

Shull, D; Joe Cordaro, J

2007-03-28T23:59:59.000Z

231

Wireless technology for integrated manufacturing  

SciTech Connect

This paper describes the ground breaking work in Oak Ridge facilities that now leads us to the brink of the wireless revolution in manufacturing. The focus is on solving tough technological problems necessary for success and addressing the critical issues of throughput, security, reliability, and robustness in applying wireless technology to manufacturing processes. Innovative solutions to these problems are highlighted through detailed designs and testbed implementations that demonstrate key concepts. The DOE-Oak Ridge complex represented by the Oak Ridge Centers for Manufacturing Technologies (ORCMT) continues to develop these technologies and will continue to focus on solving tough manufacturing problems.

Manges, W.W.; Allgood, G.O.; Shourbaji, A.A.

1996-08-01T23:59:59.000Z

232

for distributed wireless sensor networks  

E-Print Network (OSTI)

MEMS technology is enabling the development of inexpensive, autonomous wireless sensor nodes with volumes ranging from cubic mm to several cubic cm. These tiny sensor nodes can form rapidly deployed, massive distributed networks to allow unobtrusive, spatially dense, sensing and communication. MEMS enable these devices by reducing both the volume and energy consumption of various components. This paper will review some of the wireless sensor nodes under development and applicable MEMS devices for small and efficient optical communication, micropower generation, and sensing. In addition, CMOS post-process micromachining will be discussed as a method of achieving low cost and high integration. 1.

Brett A. Warneke; Kristofer S. J. Pister

2002-01-01T23:59:59.000Z

233

Developing an Efficient DMCIS with Next-Generation Wireless Networks  

E-Print Network (OSTI)

The impact of extreme events across the globe is extraordinary which continues to handicap the advancement of the struggling developing societies and threatens most of the industrialized countries in the globe. Various fields of Information and Communication Technology have widely been used for efficient disaster management; but only to a limited extent though, there is a tremendous potential for increasing efficiency and effectiveness in coping with disasters with the utilization of emerging wireless network technologies. Early warning, response to the particular situation and proper recovery are among the main focuses of an efficient disaster management system today. Considering these aspects, in this paper we propose a framework for developing an efficient Disaster Management Communications and Information System (DMCIS) which is basically benefited by the exploitation of the emerging wireless network technologies combined with other networking and data processing technologies.

Pathan, Al-Sakib Khan

2007-01-01T23:59:59.000Z

234

Comparative performance study of ADMR and ODMRP in the context of wireless LANs and wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless LANs (WLANs) and Wireless Sensor Networks (WSNs) are two large groups of networks that have well established application ranges. Despite the fact that they address very distinctive groups of devices and have clearly differentiated wireless interfaces, ... Keywords: medium access control mechanisms, performance evaluation, wireless LANs, wireless sensor networks

Radosveta Sokullu; Ozlem Karaca

2008-05-01T23:59:59.000Z

235

LiSP: A lightweight security protocol for wireless sensor networks  

Science Conference Proceedings (OSTI)

Small low-cost sensor devices with limited resources are being used widely to build a self-organizing wireless network for various applications, such as situation monitoring and asset surveillance. Making such a sensor network secure is crucial to their ... Keywords: Authentication, key management, lightweight security, sensor networks

Taejoon Park; Kang G. Shin

2004-08-01T23:59:59.000Z

236

An Interactive, Source-Centric, Open Testbed for Developing and Profiling Wireless Sensor Systems  

Science Conference Proceedings (OSTI)

The difficulty of developing wireless sensor systems is widely recognized. Problems associated with testing, debugging, and profiling are key contributing factors. While network simulators have proven useful, they are unable to capture the subtleties ... Keywords: Debugging, Experimentation, Instrumentation, Profiling, Sensor Networks, Testbeds, Testing

Andrew R. Dalton; Jason O. Hallstrom

2009-04-01T23:59:59.000Z

237

ADAPTIVE DYNAMIC ROUTING IN MOBILE WIRELESS AD HOC NETWORKS UTILIZING ON-LINE LINK LIFE ESTIMATES  

E-Print Network (OSTI)

ADAPTIVE DYNAMIC ROUTING IN MOBILE WIRELESS AD HOC NETWORKS UTILIZING ON-LINE LINK LIFE ESTIMATES of communication infrastructure and by the mobility of the hosts, which also act as routers [9]. Because of this varies widely with the age of the links, so the current duration of a link brings much more information

Baras, John S.

238

Wireless power transfer for scaled electronic biomedical implants  

E-Print Network (OSTI)

A picture of the wireless LED during operation is shown inDemonstration of wireless LED system during operation. ForDemonstration of wireless LED system during operation. For

Theilmann, Paul Thomas

2012-01-01T23:59:59.000Z

239

Building a wireless network infrastructure under budget constraints  

Science Conference Proceedings (OSTI)

This paper examines wireless networking and provides a case study of a wireless network infrastructure's development at an urban university of 11,000 students. The University of Houston Downtown (UHD) incorporated wireless technology to help ... Keywords: budget constraints, case study, curricula-related products, e-learning, higher education, m-learning, mobile communications, mobile learning, mobile technology, urban university, wireless communications, wireless network infrastructure, wireless networks

Richard A. McMahon; Peter D. DeVries; P. Pete Chong

2005-12-01T23:59:59.000Z

240

Radio frequency circuits for wireless receiver front-ends  

E-Print Network (OSTI)

The beginning of the 21st century sees great development and demands on wireless communication technologies. Wireless technologies, either based on a cable replacement or on a networked environment, penetrate our daily life more rapidly than ever. Low operational power, low cost, small form factor, and function diversity are the crucial requirements for a successful wireless product. The receiver??s front-end circuits play an important role in faithfully recovering the information transmitted through the wireless channel. Bluetooth is a short-range cable replacement wireless technology. A Bluetooth receiver architecture was proposed and designed using a pure CMOS process. The front-end of the receiver consists of a low noise ampli?er (LNA) and mixer. The intermediate frequency was chosen to be 2MHz to save battery power and alleviate the low frequency noise problem. A conventional LNA architecture was used for reliability. The mixer is a modi?ed Gilbert-cell using the current bleeding technique to further reduce the low frequency noise. The front-end draws 10 mA current from a 3 V power supply, has a 8.5 dB noise ?gure, and a voltage gain of 25 dB and -9 dBm IIP3. A front-end for dual-mode receiver is also designed to explore the capability of a multi-standard application. The two standards are IEEE 802.11b and Bluetooth. They work together making the wireless experience more exciting. The front-end is designed using BiCMOS technology and incorporating a direct conversion receiver architecture. A number of circuit techniques are used in the front-end design to achieve optimal results. It consumes 13.6 mA from a 2.5 V power supply with a 5.5 dB noise ?gure, 33 dB voltage gain and -13 dBm IIP3. Besides the system level contributions, intensive studies were carried out on the development of quality LNA circuits. Based on the multi-gated LNA structure, a CMOS LNA structure using bipolar transistors to provide linearization is proposed. This LNA con?guration can achieve comparable linearity to its CMOS multi-gated counterpart and work at a higher frequency with less power consumption. A LNA using an on-chip transformer source degeneration is proposed to realize input impedance matching. The possibility of a dual-band cellular application is studied. Finally, a study on ultra-wide band (UWB) LNA implementation is performed to explore the possibility and capability of CMOS technology on the latest UWB standard for multimedia applications.

Xin, Chunyu

2004-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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

Cellular / wireless LAN repeater system by wireless optical link with optical power supply  

Science Conference Proceedings (OSTI)

Wireless market, such as cellular systems and wireless LAN, becomes huge and is still expanding. Since operational frequency and transmission bit rate are increasing, much more base stations or access points are necessary to overcome capacity and link ... Keywords: RoF, cellular system, optical power transmission, optical transmission, wireless

Nobuo Nakajima; Naohiro Yokota

2008-08-01T23:59:59.000Z

242

Context-for-wireless: context-sensitive energy-efficient wireless data transfer  

Science Conference Proceedings (OSTI)

Ubiquitous connectivity on mobile devices will enable numerous new applications in healthcare and multimedia. We set out to check how close we are towards ubiquitous connectivity in our daily life. The findings from our recent field-collected data from ... Keywords: context-for-wireless, energy-efficient wireless, multiple wireless interfaces

Ahmad Rahmati; Lin Zhong

2007-06-01T23:59:59.000Z

243

NNSA-Wide  

National Nuclear Security Administration (NNSA)

NNSA-Wide Fiscal Year 2012 Year-End Workforce Diversity Office of Civil Rights NA-1.2 Albuquerque Complex PO Box 5400 Albuquerque, NM 87185 Phone (505) 845-5517 Fax (505) 845-4963...

244

Automation World Features New White Paper on Wireless Security...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Automation World Features New White Paper on Wireless Security Automation World Features New White Paper on Wireless Security The April 2009 issue of Automation World magazine...

245

Wireless Sensor Network for Improving the Energy Efficiency of...  

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

032012 Publisher Lawrence Berkeley National Laboratory City Berkeley Keywords data center, energy efficiency, energy efficiency of data, Wireless sensor, Wireless sensor...

246

Changes related to "Battery Wireless Solutions Inc" | Open Energy...  

Open Energy Info (EERE)

Special page Share this page on Facebook icon Twitter icon Changes related to "Battery Wireless Solutions Inc" Battery Wireless Solutions Inc Jump to: navigation,...

247

Pages that link to "Battery Wireless Solutions Inc" | Open Energy...  

Open Energy Info (EERE)

Edit History Share this page on Facebook icon Twitter icon Pages that link to "Battery Wireless Solutions Inc" Battery Wireless Solutions Inc Jump to: navigation,...

248

Wireless technology collects real-time information from oil and...  

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

Wireless technology collects real-time information from oil and gas wells Wireless technology collects real-time information from oil and gas wells The patented system delivers...

249

ISA Approves Standard for Wireless Automation in Process Control...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ISA Approves Standard for Wireless Automation in Process Control Applications ISA Approves Standard for Wireless Automation in Process Control Applications On September 9, the...

250

Advancing Wireless Medical Device Interoperability: Overview ...  

Science Conference Proceedings (OSTI)

... system that has greater error resistance and improved ... has a portfolio of over 900 active standards and ... to safely support the proliferation of wireless ...

2013-08-26T23:59:59.000Z

251

Ultrahigh-Temperature Distributed Wireless Sensors  

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

Ultrahigh-Temperature Distributed Wireless Sensors Description The U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL) is working in cooperation with Prime...

252

Wireless Sensors Improve Data Center Efficiency  

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

foot, increase, energy savings for cooling can be realized by applying wireless sensor network (WSN) technology and using the gathered information to efficiently manage the data...

253

Wireless Demand Response Controls for HVAC Systems  

E-Print Network (OSTI)

Response Controls for HVAC Systems Clifford Federspiel,tests. Figure 5: Specific HVAC electric power consumptioncontrol, demand response, HVAC, wireless Executive Summary

Federspiel, Clifford

2010-01-01T23:59:59.000Z

254

Networking support for underwater wireless networks.  

E-Print Network (OSTI)

?? Underwater wireless networks provide many opportunities for exploration, environmental monitoring, and military applications. Future growth of underwater networks seems promising as much of the… (more)

Kredo, Kurtis B., II

2010-01-01T23:59:59.000Z

255

Energy Saving Methods in Wireless Sensor Networks.  

E-Print Network (OSTI)

?? To predict the lifetime of wireless sensor networks before their installation is an important concern. The IEEE 802.15.4 standard is specifically meant to support… (more)

JAWAD ALI, SYED

2008-01-01T23:59:59.000Z

256

Empowering Operations and Maintenance through Wireless  

Science Conference Proceedings (OSTI)

Presentation Title, Empowering Operations and Maintenance through Wireless. Author(s), Neil Freeman, Soroush Amidi, David Fisk. On-Site Speaker (Planned)

257

Wireless Sensor Networks for Underwater Localization: A Survey  

E-Print Network (OSTI)

Autonomous Underwater Vehicles (AUVs) have widely deployed in marine investigation and ocean exploration in recent years. As the fundamental information, their position information is not only for data validity but also for many real-world applications. Therefore, it is critical for the AUV to have the underwater localization capability. This report is mainly devoted to outline the recent advancement of Wireless Sensor Networks (WSN) based underwater localization. Several classic architectures designed for Underwater Acoustic Sensor Network (UASN) are briefly introduced. Acoustic propagation and channel models are described and several ranging techniques are then explained. Many state-of-the-art underwater localization algorithms are introduced, followed by the outline of some

Sen Wang; Huosheng Hu

2012-01-01T23:59:59.000Z

258

Wide open spaces  

Science Conference Proceedings (OSTI)

The U.S. Federal Communications Commission's decision to open frequencies in the broadcast spectrum could enable broadband networks in rural areas, permit smart electric grids, and more.

Neil Savage

2010-11-01T23:59:59.000Z

259

Research Areas  

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

Areas Areas Research Areas Print Scientists from a wide variety of fields come to the ALS to perform experiements. Listed below are some of the most common research areas covered by ALS beamlines. Below each heading are a few examples of the specific types of topics included in that category. Click on a heading to learn more about that research area at the ALS. Energy Science Photovoltaics, photosynthesis, biofuels, energy storage, combustion, catalysis, carbon capture/sequestration. Bioscience General biology, structural biology. Materials/Condensed Matter Correlated materials, nanomaterials, magnetism, polymers, semiconductors, water, advanced materials. Physics Atomic, molecular, and optical (AMO) physics; accelerator physics. Chemistry Surfaces/interfaces, catalysts, chemical dynamics (gas-phase chemistry), crystallography, physical chemistry.

260

TESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS  

E-Print Network (OSTI)

TESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS Ljiljana Trajkovi Communication Networks;January 17, 2005 UBC Ljiljana Trajkovic, Simon Fraser University 2 Road map Tesla in 1890's First wireless;January 17, 2005 UBC Ljiljana Trajkovic, Simon Fraser University 4 Alternate currents Tesla left Edison

Trajkovic, Ljiljana

Note: This page contains sample records for the topic "wide area wireless" 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

Diagnostic tracing for wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are typically deployed in harsh environments, thus post-deployment failures are not infrequent. An execution trace containing events in their order of execution could play a crucial role in postmortem diagnosis of these failures. ... Keywords: Embedded debugging, diagnosis, tracing, wireless sensor networks

Vinaitheerthan Sundaram; Patrick Eugster; Xiangyu Zhang; Vamsidhar Addanki

2013-07-01T23:59:59.000Z

262

Wireless Energy Transfer Using Magnetic Resonance  

Science Conference Proceedings (OSTI)

In 1899, Nikola Tesla, who had devised a type of resonant transformer called the Tesla coil, achieved a major breakthrough in his work by transmitting 100 million volts of electric power wirelessly over a distance of 26 miles to light up a bank of 200 ... Keywords: wireless energy transfer, near field, evanescent wave, magnetic resonance, self-resonance

Rohan Bhutkar; Sahil Sapre

2009-12-01T23:59:59.000Z

263

Underground Structure Monitoring with Wireless Sensor Networks  

E-Print Network (OSTI)

University of Science and Technology {limo, liu}@cse.ust.hk ABSTRACT Environment monitoring in coal mines, Underground, Coal Mine 1. INTRODUCTION A Wireless Sensor Network (WSN) is a self-organized wireless network and widths of several meters) has been a crucial task to ensure safe working conditions in coal mines where

Liu, Yunhao

264

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

265

Cooperative caching in wireless multimedia sensor networks  

Science Conference Proceedings (OSTI)

The recent advances in miniaturization and the creation of low-power circuits, combined with small-sized batteries have made the development of wireless sensor networks a working reality. Lately, the production of cheap complementary metal-oxide semiconductor ... Keywords: cooperative caching, multimedia, replacement policy, wireless sensor networks

Nikos Dimokas; Dimitrios Katsaros; Yannis Manolopoulos

2008-08-01T23:59:59.000Z

266

Cooperative proxy caching for wireless base stations  

Science Conference Proceedings (OSTI)

This paper proposes a mobile cache model to facilitate the cooperative proxy caching in wireless base stations. This mobile cache model uses a network cache line to record the caching state information about a web document for effective data search and ... Keywords: VPG, Wireless internet, base station, mobile cache model, network cache line, proxy caching

James Z. Wang; Zhidian Du; Pradip K. Srimani

2007-01-01T23:59:59.000Z

267

Efficient code distribution in wireless sensor networks  

Science Conference Proceedings (OSTI)

The need to reprogramme a wireless sensor network may arise from changing application requirements, bug fixes, or during the application development cycle. Once deployed, it will be impractical at best to reach each individual node. Thus, a scheme is ... Keywords: code distribution, compression, reprogramming, sensor networks, string distance, wireless

Niels Reijers; Koen Langendoen

2003-09-01T23:59:59.000Z

268

TCP with delayed ack for wireless networks  

Science Conference Proceedings (OSTI)

This paper studies the TCP performance with delayed ack in wireless networks (including ad hoc and WLANs) which use IEEE 802.11 MAC protocol as the underlying medium access control. Our analysis and simulations show that TCP throughput does not always ... Keywords: Adaptive delayed ack, Congestion control, Friendliness, TCP, Wireless medium access/contention

Jiwei Chen; Mario Gerla; Yeng Zhong Lee; M. Y. Sanadidi

2008-09-01T23:59:59.000Z

269

Requirements for wireless technology on rolling stock  

Science Conference Proceedings (OSTI)

This paper gives an overview of railway specific requirements on wireless technologies and discusses the influence of different product life cycles in railway industry and communication technology. The main challenges are the heterogeneous communication ... Keywords: maintenance, passenger information, product life cycle, railway application interface, railway requirements, train operation, wireless communication

Uwe Kucharzyk

2011-03-01T23:59:59.000Z

270

Computing & Communications WIRELESS SETUP FOR WINDOWS 7  

E-Print Network (OSTI)

Computing & Communications WIRELESS SETUP FOR WINDOWS 7 For assistance during the configuration access to the WLAN and have laptops and desktops which use the Windows 7 operating system. It is provided. Requirements: A laptop with Windows 7 operating system with latest service pack and patches applied. A wireless

Warkentin, Ian G.

271

Deterministic Secure Positioning in Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Position verification problem is an important building block for a large subset of wireless sensor networks (WSN) applications. As a result, the performance of the WSN degrades significantly when misbehaving nodes report false location information in ... Keywords: Distributed Protocol, Secure Positioning, Wireless Sensor Network

Sylvie Delaët; Partha Sarathi Mandal; Mariusz A. Rokicki; Sébastien Tixeuil

2008-06-01T23:59:59.000Z

272

Efficient XML usage within wireless sensor networks  

Science Conference Proceedings (OSTI)

Integrating wireless sensor networks in heterogeneous networks is a complex task. A reason is the absence of a standardized data exchange format that is supported in all participating sub networks. XML has evolved to the de facto standard data exchange ... Keywords: XML, database management, programming language, wireless sensor networks

Nils Hoeller; Christoph Reinke; Jana Neumann; Sven Groppe; Daniel Boeckmann; Volker Linnemann

2008-11-01T23:59:59.000Z

273

LUSTER: wireless sensor network for environmental research  

Science Conference Proceedings (OSTI)

Environmental wireless sensor network (EWSN) systems are deployed in potentially harsh and remote environments where inevitable node and communication failures must be tolerated. LUSTER---Light Under Shrub Thicket for Environmental Research---is a system ... Keywords: LiteTDMA, architecture, environmental science, implementation, mote, network protocol, storage, validation, wireless sensor network

L. Selavo; A. Wood; Q. Cao; T. Sookoor; H. Liu; A. Srinivasan; Y. Wu; W. Kang; J. Stankovic; D. Young; J. Porter

2007-11-01T23:59:59.000Z

274

Zonal Rumor Routing for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Routing algorithms for wireless sensor networks are constrained by power, memory and computational resources. Rumor Routing algorithm for sensor networks spreads theinformation of an event to other nodes in the network, thus enabling queries to discover ... Keywords: Sensor Network, Routing, Wireless, Rumor Routing

Tarun Banka; Gagan Tandon; Anura P. Jayasumana

2005-04-01T23:59:59.000Z

275

DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS  

SciTech Connect

The first quarter of the Downhole Power Generation and Wireless Communications for Intelligent Completions Applications was characterized by the evaluation and determination of the specifications required for the development of the system for permanent applications in wellbores to the optimization of hydrocarbon production. The system will monitor and transmit in real time pressure and temperature information from downhole using the production tubing as the medium for the transmission of the acoustic waves carrying digital information. The most common casing and tubing sizes were determined by interfacing with the major oil companies to obtain information related to their wells. The conceptual design was created for both the wireless gauge section of the tool as well as the power generation module. All hardware for the wireless gauge will be placed in an atmospheric pressure chamber located on the outside of a production tubing with 11.4 centimeter (4-1/2 inch) diameter. This mounting technique will reduce cost as well as the diameter and length of the tool and increase the reliability of the system. The power generator will use piezoelectric wafers to generate electricity based on the flow of hydrocarbons through an area in the wellbore where the tool will be deployed. The goal of the project is to create 1 Watt of power continuously.

Paul Tubel

2003-03-24T23:59:59.000Z

276

A Peer-to-Peer Approach to Wireless LAN Roaming  

E-Print Network (OSTI)

We make the case for a Global Confederation of Peer-to-Peer (P2P) Wireless Local Area Networks. A P2P Wireless Network Confederation (P2PWNC) is a community of administrative domains that offer wireless Internet access to each other's registered users. The ubiquitous Internet access that the roaming users of these domains could enjoy compensates for their home domain's cost of providing access to visitors. Existing roaming schemes utilize central authorities or bilateral contracts to control access to resources. In contrast, a P2PWNC forms a pure P2P community in which participating domains are autonomous entities. Domains make independent decisions concerning the amount of bandwidth they contribute. As a result, similarly to existing P2P systems, a P2PWNC will suffer from "free-riding" if no incentive mechanisms exist to ensure that domains offer the amount of resources that is economically justified. Flexible rules on reciprocity can be set to delimit domain actions and encourage domains to provide in order to consume. In this paper, we present several aspects of the P2PWNC requirements and design. We outline several P2PWNC implementation issues relating to user privacy and the confederation's real-world deployment. We also describe the P2PWNC prototype that we developed.

Elias C. Efstathiou; George C. Polyzos

2003-01-01T23:59:59.000Z

277

Final Report: Mobile Surveillance and Wireless Communication Systems Field Operational Test; Volume 1: Executive Summary  

E-Print Network (OSTI)

Design and Operation The mobile surveillance and wirelessAND WIRELESS COMMUNICATION SYSTEM DESIGN AND OPERATION.with camera operation. Mobile Surveillance and Wireless

Klein, Lawrence

1999-01-01T23:59:59.000Z

278

ISA Approves Standard for Wireless Automation in Process Control  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ISA Approves Standard for Wireless Automation in Process Control ISA Approves Standard for Wireless Automation in Process Control Applications ISA Approves Standard for Wireless Automation in Process Control Applications On September 9, the Standards and Practices Board of the International Society for Automation (ISA) approved the ISA-100.11a wireless standard, "Wireless Systems for Industrial Automation: Process Control and Related Applications," making it an official ISA standard. ISA Approves Standard for Wireless Automation in Process Control Applications More Documents & Publications DOE/OE National SCADA Test Bed Fiscal Year 2009 Work Plan Wireless System Considerations When Implementing NERC Critical Infrastructure Protection Standards Control Systems Security Standards: Accomplishments And Impacts

279

Building Technologies Office: Harmonization of Wireless Dimming Lighting  

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

Harmonization of Harmonization of Wireless Dimming Lighting Controls Research Project to someone by E-mail Share Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on Facebook Tweet about Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on Twitter Bookmark Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on Google Bookmark Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on Delicious Rank Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on Digg Find More places to share Building Technologies Office: Harmonization of Wireless Dimming Lighting Controls Research Project on

280

Emerging business models and trends in the mobile wireless industry  

Science Conference Proceedings (OSTI)

This paper provides a theory to account for how emerging business models and trends are driving scale and scope economies in the mobile wireless industry. Despite raising expectations, the mobile wireless industry is currently volatile. As difficult ... Keywords: alliance, bundling, convergence, mobile networks, mobile virtual network operators, mobile wireless, network sharing, service differentiation, software outsourcing, software systems, technological evolution, value chain, wireless gateways, wireless networks

Hemant K. Sabat

2007-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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.


281

Program on Technology Innovation: Impact of Wireless Power Transfer Technology  

Science Conference Proceedings (OSTI)

This report presents an overview and analysis of wireless power transmission, also called wireless power transfer (WPT), a means of delivering power from a source to an end-use device without wires or contacts. The recent explosive growth in wireless data applications and the surge in the use of portable electronic devices has dramatically increased the market potential for wireless energy-transfer technologies. Industries are investigating the latest wireless power technologies to improve versatility, r...

2009-12-22T23:59:59.000Z

282

Wireless Sensors for Data Centers  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Proving Ground Proving Ground Wireless Sensors for Data Centers Kevin Powell |May 23 2012 | FEMP Technology Deployment Working Group 9,624 Owned and Leased Assets 30% Metered Energy Reduction, by 2015 NET ZERO In New Construction and Major Remodels, by 2030 EISA 2007 GSA's Green Proving Ground The Green Proving Ground aims to leverage innovative technologies to accelerate GSA's sustainability goals. Program Focus: Identify, test and evaluate innovative technologies to: * Drive innovation in environmental performance in federal buildings * Help lead market transformation through deployment of new technologies. * Reduce GSA operational costs How Does It Work? Green Proving Ground

283

Wireless Sensors for Data Centers  

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

Proving Ground Proving Ground Wireless Sensors for Data Centers Kevin Powell |May 23 2012 | FEMP Technology Deployment Working Group 9,624 Owned and Leased Assets 30% Metered Energy Reduction, by 2015 NET ZERO In New Construction and Major Remodels, by 2030 EISA 2007 GSA's Green Proving Ground The Green Proving Ground aims to leverage innovative technologies to accelerate GSA's sustainability goals. Program Focus: Identify, test and evaluate innovative technologies to: * Drive innovation in environmental performance in federal buildings * Help lead market transformation through deployment of new technologies. * Reduce GSA operational costs How Does It Work? Green Proving Ground

284

Energy efficiency in wireless networks  

E-Print Network (OSTI)

Energy is a critical resource in the design of wireless networks since wireless devices are usually powered by batteries. Battery capacity is finite and the progress of battery technology is very slow, with capacity expected to make little improvement in the near future. Under these conditions, many techniques for conserving power have been proposed to increase battery life. In this dissertation we consider two approaches to conserving the energy consumed by a wireless network interface. One technique is to use power saving mode, which allows a node to power off its wireless network interface (or enter a doze state) to reduce energy consumption. The other is to use a technique that suitably varies transmission power to reduce energy consumption. These two techniques are closely related to theMAC (Medium Access Control) layer. With respect to power saving mode, we study IEEE 802.11 PSM (Power Saving Mechanism) and propose a scheme that improves its energy efficiency. We also investigate the interaction between power saving mode and TCP (Transport Control Protocol). As a second approach to conserving energy, we investigate a simple power control protocol, called BASIC, which uses the maximum transmission power for RTS-CTS and the minimum necessary power for DATA-ACK. We identify the deficiency of BASIC, which increases collisions and degrades network throughput, and propose a power control protocol that addresses these problems and achieves energy savings. Since energy conservation is not an issue limited to one layer of the protocol stack, we study a cross layer design that combines power control at the MAC layer and power aware routing at the network layer. One poweraware routing metric is minimizing the aggregate transmission power on a path from source to destination. This metric has been used along with BASIC-like power control under the assumption that it can save energy, which we show to be false. Also, we show that the power aware routing metric leads to a lower throughput. We show that using the shortest number of hops in conjunction with BASIC-like power control conserves more energy than power aware routing with BASIC-like power control.

Jung, Eun-Sun

2005-08-01T23:59:59.000Z

285

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

286

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

287

A prioritized battery-aware routing protocol for wireless ad hoc networks  

Science Conference Proceedings (OSTI)

It is a challenge area in the field of ad hoc networks to support prioritized routing for time sensitive applications, such as multimedia communications, IP telephony and interactive games. However the existing protocols did not consider the special ... Keywords: battery models, battery-awareness, energy efficiency, prioritized routing, routing protocols, wireless ad hoc networks

Chi Ma; Yuanyuan Yang

2005-10-01T23:59:59.000Z

288

UWB-Based Localization in Wireless Sensor Networks Di Wu, Lichun Bao, Renfa Li  

E-Print Network (OSTI)

for WPANs (wireless personal area networks) using the UWB technology. We place our system in coal mine and localization algorithms can accurately compute moving object locations in coal mine environments. Keywords formation assump- tions. In this paper, we place our localization method in coal mine environments

Bao, Lichun

289

Wireless Robotics: A History, an Overview, and the Need for Standardization  

Science Conference Proceedings (OSTI)

The field of Robotics is one of the most fascinating areas of research in the world. Right now, hundreds of universities, corporations, and governments are spending billions researching and developing intelligent robotic systems for use in automation, ... Keywords: Artificial intelligence, Autonomous mobility, Communications, Intelligent control, Robot, Wireless Robotics

Sanil Pruthi

2012-06-01T23:59:59.000Z

290

TOA-based location estimation accuracy for 3D wireless sensor networks  

Science Conference Proceedings (OSTI)

WSNs are a physical impossibility to be deployed into the area of absolute plane in the context of real-world applications. For all kinds of applications in WSNs accurate location information is crucial. In this article, we focus on 3D location accuracy ... Keywords: 3D, CRB, TOA, wireless sensor networks

Qiao-ling Du; Xiaoying Sun; Rui Ding; Zhi-hong Qian; Shu-xun Wang

2009-09-01T23:59:59.000Z

291

Research Areas  

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

Research Areas Print Research Areas Print Scientists from a wide variety of fields come to the ALS to perform experiements. Listed below are some of the most common research areas covered by ALS beamlines. Below each heading are a few examples of the specific types of topics included in that category. Click on a heading to learn more about that research area at the ALS. Energy Science Photovoltaics, photosynthesis, biofuels, energy storage, combustion, catalysis, carbon capture/sequestration. Bioscience General biology, structural biology. Materials/Condensed Matter Correlated materials, nanomaterials, magnetism, polymers, semiconductors, water, advanced materials. Physics Atomic, molecular, and optical (AMO) physics; accelerator physics. Chemistry Surfaces/interfaces, catalysts, chemical dynamics (gas-phase chemistry), crystallography, physical chemistry.

292

Wireless Sensors Improve Data Center Efficiency  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wireless Sensor Wireless Sensor Technology Overview In most buildings, space conditions are controlled and coordinated by a building automation system (BAS). A BAS can provide temperature visualization information with dashboard displays through a person-machine interface (PMI). However, in most data centers, space conditioning is achieved with multiple, independently-operating cooling units located within the space. Unfortunately, these data centers do not have adequate auto- mation systems or visualization tools to monitor or manage these cooling units efficiently. In 2001, an emerging technology was demonstrated at University of California, Davis by Dr. Raju Pandey that "meshed" temperature sensors into a network using wireless fidelity (Wi-Fi

293

EM threat analysis for wireless systems.  

SciTech Connect

Modern digital radio systems are complex and must be carefully designed, especially when expected to operate in harsh propagation environments. The ability to accurately predict the effects of propagation on wireless radio performance could lead to more efficient radio designs as well as the ability to perform vulnerability analyses before and after system deployment. In this report, the authors--experts in electromagnetic (EM) modeling and wireless communication theory--describe the construction of a simulation environment that is capable of quantifying the effects of wireless propagation on the performance of digital communication.

Burkholder, R. J. (Ohio State University Electroscience Laboratory); Mariano, Robert J.; Schniter, P. (Ohio State University Electroscience Laboratory); Gupta, I. J. (Ohio State University Electroscience Laboratory)

2006-06-01T23:59:59.000Z

294

IEEE P802.15 Wireless Personal Area Networks  

Science Conference Proceedings (OSTI)

... and L2CAP protocols used above the RF channel. ... time reference tref erence until the start of a ... further assumptions on the network topology and the ...

2001-04-04T23:59:59.000Z

295

IEEE P802.15 Wireless Personal Area Networks  

Science Conference Proceedings (OSTI)

... is typically associated with the RF channel modeling ... 625 s. A master device starts its transmission ... be noted that depending on the topology and the ...

2003-12-11T23:59:59.000Z

296

Visitors Far and Wide  

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

4 4 Visitors Far and Wide From left: Minister Danilov-Daniljan, Evan Mills (Assistant Director, Center for Building Science), Victoria Mats (interpreter and Soviet energy analyst), and Len Grossman (PG&E Energy Center) tour the PG&E Energy Center in San Francisco. The Russian Minister of Ecology and Natural Resources, Victor I. Danilov-Daniljan, spent three days in California as the Center's guest. The Minister presented information on current Soviet energy and environmental dilemmas and participated in a day-long roundtable discussion with representatives of major utilities, manufacturers of energy-efficient technologies, energy regulators, nongovernmental organizations, and Center scientists. Julian Aizenberg, one of the former Soviet Union's (FSU) foremost lighting

297

Island Wide Management Corporation  

Office of Legacy Management (LM)

9 1986 9 1986 Island Wide Management Corporation 3000 Marcus Avenue Lake Success, New York 11042 Dear Sir or Madam: I am sending you this letter and the enclosed information as you have been identified by L. I. Trinin of Glick Construction Company as the representatives of the owners of the property that was formerly the site of the Sylvania-Corning Nuclear Corporation in Bayside, New York. The Department of Energy is evaluating the radiological condition of sites that were utilized under the Manhattan Engineer District and/or the Atomic Energy Commission in the early years of nuclear energy development to determine whether they need remedial action and whether the Department has authority to perform such action. As you may know, the former Sylvania-Corning Corporation Bayside site was identified as one such site.

298

An Exact Combinatorial Analysis for the Performance Evaluation of Framed Slotted Aloha Systems with Diversity Transmission Over Erasable Wireless Channels  

Science Conference Proceedings (OSTI)

Framed Slotted Aloha (FSA) protocols are widely used in various communication systems. This paper investigates the performance of FSA systems that employ diversity transmission (DT) techniques over erasable wireless channels. Two DT schemes, DT-SWIR ... Keywords: Activity factor, Diversity transmission, Erasable channels, Framed slotted Aloha, Sampling with/without replacement

In-Hang Chung; Ming-Ching Yen

2013-04-01T23:59:59.000Z

299

Wireless Environment LLC | Open Energy Information  

Open Energy Info (EERE)

Wireless Environment LLC Wireless Environment LLC Jump to: navigation, search Name Wireless Environment LLC Place Elyria, Ohio Product Wireless Environment designs light-emitting diode lighting products that it sells through a vehicle called "Mr. Beams." Coordinates 41.36768°, -82.105839° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.36768,"lon":-82.105839,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

300

The Berkeley Tricorder: wireless health monitoring  

Science Conference Proceedings (OSTI)

The advancement of precision micropower amplifiers, microcontrollers, and MEMs devices have allowed for a paradigm shift from traditionally large and costly health monitoring equipment only found in hospitals or care centers to smaller, wireless, low ...

Reza Naima; John F. Canny

2010-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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.


301

Cross-layer wireless bit rate adaptation  

E-Print Network (OSTI)

This paper presents SoftRate, a wireless bit rate adaptation protocol that is responsive to rapidly varying channel conditions. Unlike previous work that uses either frame receptions or signal-to-noise ratio (SNR) estimates ...

Vutukuru, Mythili

2009-01-01T23:59:59.000Z

302

Cross-Layer Wireless Bit Rate Adaptation  

E-Print Network (OSTI)

This paper presents SoftRate, a wireless bit rate adaptation protocol that is responsive to rapidly varying channel conditions. Unlike previous work that uses either frame receptions or signal-to-noise ratio (SNR) estimates ...

Vutukuru, Mythili

303

Designing a wireless underwater optical communication system  

E-Print Network (OSTI)

Though acoustic modems have long been the default wireless communication method for underwater applications due to their long range, the need for high speed communication has prompted the exploration of non-acoustic methods ...

Brundage, Heather

2010-01-01T23:59:59.000Z

304

Virtual infrastructure for wireless ad hoc networks  

E-Print Network (OSTI)

One of the most significant challenges introduced by ad hoc networks is coping with the unpredictable deployment, uncertain reliability, and erratic communication exhibited by emerging wireless networks and devices. The ...

Gilbert, Seth, 1976-

2007-01-01T23:59:59.000Z

305

Embracing Wireless Interference: Analog Network Coding  

E-Print Network (OSTI)

Traditionally, interference is considered harmful.Wireless networks strive to avoid scheduling multiple transmissions at the same time in order to prevent interference. This paper adopts the opposite approach; it encourages ...

Katti, Sachin

2007-02-23T23:59:59.000Z

306

Intelligent Lighting System Using Wireless Sensor Networks  

E-Print Network (OSTI)

This paper examines the use of Wireless Sensor Networks interfaced with light fittings to allow for daylight substitution techniques to reduce energy usage in existing buildings. This creates a wire free system for existing buildings with minimal disruption and cost.

Kumaar, A A Nippun; TSB, Sudarshan; 10.5121/ijasuc.2010.1402

2011-01-01T23:59:59.000Z

307

Routing in heterogeneous wireless ad hoc networks  

E-Print Network (OSTI)

Wireless ad hoc networks are used in several applications ranging from infrastructure monitoring to providing Internet connectivity to remote locations. A common assumption about these networks is that the devices that ...

Cheekiralla, Sivaram M. S. L., 1980-

2008-01-01T23:59:59.000Z

308

Wireless Demand Response Controls for HVAC  

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

Wireless Demand Response Controls for HVAC Speaker(s): Clifford Federspiel Date: June 22, 2006 - 12:00pm Location: 90-3148 Seminar HostPoint of Contact: Richard Diamond Peng Xu We...

309

Cooperative caching in wireless multimedia sensor networks  

Science Conference Proceedings (OSTI)

The recent advances in miniaturization and the creation of low-power circuits, combined with small-sized batteries have made the development of wireless sensor networks a working reality. Lately, the production of cheap CMOS cameras and microphones gave ...

Nikos Dimokas; Dimitrios Katsaros; Yannis Manolopoulos

2007-08-01T23:59:59.000Z

310

Effective RSS sampling for forensic wireless localization  

Science Conference Proceedings (OSTI)

In many applications such as wireless crime scene investigation, we want to use a single device moving along a route for accurate and efficient localization without the help of any positioning infrastructure or trained signal strength map. Our experiments ...

Yinjie Chen, Zhongli Liu, Xinwen Fu, Wei Zhao

2013-08-01T23:59:59.000Z

311

Wireless Demand Response Controls for HVAC Systems  

E-Print Network (OSTI)

the contribution of air-conditioning. Figure 2: WirelessIntroduction Commercial air-conditioning is one of thethe Cal ISO is commercial air-conditioning. One of the most

Federspiel, Clifford

2010-01-01T23:59:59.000Z

312

Power Control in Wireless Cellular Networks  

Science Conference Proceedings (OSTI)

Transmit power in wireless cellular networks is a key degree of freedom in the management of interference, energy, and connectivity. Power control in both the uplink and downlink of a cellular network has been extensively studied, especially over the ...

Mung Chiang; Prashanth Hande; Tian Lan; Chee Wei Tan

2008-04-01T23:59:59.000Z

313

Data acquisition scheduling for wireless sensors networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks have been increasingly studied by industry and academic institutions due to their potential application in environmental and geothermal monitoring, security enhancement among others. Such technology would play an important role ...

Carlos Gamboa / Thomas Robertazzi

2008-01-01T23:59:59.000Z

314

Wireless power transmission for medical applications  

E-Print Network (OSTI)

We studied the wireless power transmission capabilities of microwave through human skin-tissue. Microwave transmission through simulated human skins was tested with rectenna array as a power receiver located under the ...

Payne, Joshua E.

315

Clear channel assessment in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are a rising commodity that demonstrate merit in the research domain due to their versatile nature. While powerful and feature-laden, these systems also require careful configuration for optimal packet transmission. This experiment ...

J. Collin Engstrom; Chase Gray

2008-03-01T23:59:59.000Z

316

An ad-hoc wireless communication system  

E-Print Network (OSTI)

This thesis studies the challenges of providing load balancing and fault-tolerant external links between ad-hoc multicast mesh networks. The work is the gateway component of a research platform called FluidVoice, a wireless ...

Yuen, Hector

2006-01-01T23:59:59.000Z

317

Maximizing degrees of freedom in wireless networks  

E-Print Network (OSTI)

We consider communication from a single source to a single destination in a wireless network with fading. Both source and destination have multiple antennas. The information reaches the destination through a sequence of ...

Borade, Shashibhushan Prataprao, 1981-

2004-01-01T23:59:59.000Z

318

Epidemic Propagation In Overlaid Wireless Networks  

SciTech Connect

Witb tbe emergence of computer worms tbat can spread over air interfaces, wireless ad boc and sensor networks can be vulnerable to node compromises even if the deployed network is not connected to the backbone. Depending on the physical topology of the wireless network, even a single infected node can compromise the whole network. In this work, epidemic (e.g., worm) propagation in a static wireless network is studied, where a number of inCected mobile nodes are injected over the existing network. It is shown that the epidemic spread threshold and size depend on the physical topology of the underlying static wireless network as well as the mobility model employed by the infected mobile nodes. More specifically, results show that in a Cully-connected static wirelessnctwork targeted attacks are more effective, wbereas Cor a random topology random attacks can be sufficient to compromise the whole network.

Yanmaz, Evsen [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

319

A unified architecture for the design and evaluation of wireless fair queueing algorithms  

Science Conference Proceedings (OSTI)

Fair queueing in the wireless domain poses significant challenges due to unique issues in the wireless channel such as location-dependent and bursty channel errors. In this paper, we present a wireless fair service model that captures the scheduling ... Keywords: fair queueing, wireless fair service, wireless networks, wireless scheduling

Thyagarajan Nandagopal; Songwu Lu; Vaduvur Bharghavan

2002-03-01T23:59:59.000Z

320

Assessment of Wireless Technologies in Substation Functions  

Science Conference Proceedings (OSTI)

New wireless technologies are becoming available that may be applied to electric substations to meet the growing needs for physical security and increased communications. These new technologies must be carefully evaluated to ensure that they meet the purposes for which they are intended. In particular, the technologies must function at remote locations and within the electrically noisy environments of substations. This report surveys and assesses the strengths and weaknesses of wireless technologies used...

2006-03-27T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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.


321

Assessment of Wireless Technologies for Advanced Automation  

Science Conference Proceedings (OSTI)

The power industry is seeing a resurgence of interest in advanced automation and customer communications. A variety of wireless technologies are becoming available that could be used in advanced automation applications for utilities. However, decisions on physical media infrastructure should be made cautiously since use of these technologies may directly impact system performance, reliability, and long-term costs. This report is a preliminary analysis of some of the leading wireless technologies that are...

2007-12-20T23:59:59.000Z

322

New and Underutilized Technology: Wireless Temperature Sensors | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wireless Temperature Sensors Wireless Temperature Sensors New and Underutilized Technology: Wireless Temperature Sensors October 4, 2013 - 4:45pm Addthis The following information outlines key deployment considerations for wireless temperature sensors within the Federal sector. Benefits Wireless thermostats are connected into a building automation system. Ease of adding temperature sensors in more zones allows for greater spatial resolution of zone temperatures, increasing confidence in control improvements through thermostat reset. Application Wireless temperature settings are applicable in most building categories. Key Factors for Deployment Ease of moving thermostats increases diagnostic capabilities in checking existing hard-wired thermostats. Ranking Criteria Federal energy savings, cost-effectiveness, and probability of success are

323

the World Wide Web  

Office of Scientific and Technical Information (OSTI)

technical report has been made technical report has been made electronically available on the World Wide Web through a contribution from Walter L. Warnick In honor of Enrico Fermi Leader of the first nuclear reactor, Nobel Prize winner, and visionary technologist Dr. Warnick is delighted to be the first sponsor for posting a Department of Energy technical report and making it broadly available Office of Scientific and Technical Information Office of Science U.S. Department of Energy September 2008 osti.gov U N I T E D S T A T E S A T O M I C E N E R G Y C O M M I S S I O N AECD-3269 EXPERIMENTAL PRODUCTION OF A DNERGENT CHAIN REACTION BY E. Fermi January 4, 1952 [TIS Issuance ate] [chicago University] - T e c h n i c a l I n f o r m a t i o n S e r v i c e , O a k Ridge, T e n n e s s e e r ABSTRACTS Description of the construction and operation of the chain

324

Design of frequency synthesizers for short range wireless transceivers  

E-Print Network (OSTI)

The rapid growth of the market for short-range wireless devices, with standards such as Bluetooth and Wireless LAN (IEEE 802.11) being the most important, has created a need for highly integrated transceivers that target drastic power and area reduction while providing a high level of integration. The radio section of the devices designed to establish communications using these standards is the limiting factor for the power reduction efforts. A key building block in a transceiver is the frequency synthesizer, since it operates at the highest frequency of the system and consumes a very large portion of the total power in the radio. This dissertation presents the basic theory and a design methodology of frequency synthesizers targeted for short-range wireless applications. Three different examples of synthesizers are presented. First a frequency synthesizer integrated in a Bluetooth receiver fabricated in 0.35?m CMOS technology. The receiver uses a low-IF architecture to downconvert the incoming Bluetooth signal to 2MHz. The second synthesizer is integrated within a dual-mode receiver capable of processing signals of the Bluetooth and Wireless LAN (IEEE 802.11b) standards. It is implemented in BiCMOS technology and operates the voltage controlled oscillator at twice the required frequency to generate quadrature signals through a divide-by-two circuit. A phase switching prescaler is featured in the synthesizer. A large capacitance is integrated on-chip using a capacitance multiplier circuit that provides a drastic area reduction while adding a negligible phase noise contribution. The third synthesizer is an extension of the second example. The operation range of the VCO is extended to cover a frequency band from 4.8GHz to 5.85GHz. By doing this, the synthesizer is capable of generating LO signals for Bluetooth and IEEE 802.11a, b and g standards. The quadrature output of the 5 - 6 GHz signal is generated through a first order RC - CR network with an automatic calibration loop. The loop uses a high frequency phase detector to measure the deviation from the 90° separation between the I and Q branches and implements an algorithm to minimize the phase errors between the I and Q branches and their differential counterparts.

Valero Lopez, Ari Yakov

2003-05-01T23:59:59.000Z

325

Wide area network monitoring system for HEP experiments at Fermilab  

SciTech Connect

Large, distributed High Energy Physics (HEP) collaborations, such as D0, CDF and US-CMS, depend on stable and robust network paths between major world research centers. The evolving emphasis on data and compute Grids increases the reliance on network performance. Fermilab's experimental groups and network support personnel identified a critical need for WAN monitoring to ensure the quality and efficient utilization of such network paths. This has led to the development of the Network Monitoring system we will present in this paper. The system evolved from the IEPM-BW project, started at SLAC three years ago. At Fermilab this system has developed into a fully functional infrastructure with bi-directional active network probes and path characterizations. It is based on the Iperf achievable throughput tool, Ping and Synack to test ICMP/TCP connectivity. It uses Pipechar and Traceroute to test, compare and report hop-by-hop network path characterization. It also measures real file transfer performance by BBFTP and GridFTP. The Monitoring system has an extensive web-interface and all the data is available through standalone SOAP web services or by a MonaLISA client. Also in this paper we will present a case study of network path asymmetry and abnormal performance between FNAL and SDSC, which was discovered and resolved by utilizing the Network Monitoring system.

Grigoriev, Maxim; /Fermilab; Cottrell, Les; Logg, Connie; /SLAC

2004-12-01T23:59:59.000Z

326

LHCNet: Wide Area Networking and Collaborative Systems for HEP  

SciTech Connect

This proposal presents the status and progress in 2006-7, and the technical and financial plans for 2008-2010 for the US LHCNet transatlantic network supporting U.S. participation in the LHC physics program. US LHCNet provides transatlantic connections of the Tier1 computing facilities at Fermilab and Brookhaven with the Tier0 and Tier1 facilities at CERN as well as Tier1s elsewhere in Europe and Asia. Together with ESnet, Internet2, the GEANT pan-European network, and NSF’s UltraLight project, US LHCNet also supports connections between the Tier2 centers (where most of the analysis of the data will take place, starting this year) and the Tier1s as needed.See report

Newman, H.B,

2007-08-20T23:59:59.000Z

327

Wide-area Monitoring and Control of Smart Grid  

Science Conference Proceedings (OSTI)

... Effects present in harsh substation environments that affect PMU ... will be examined for measurement performance under distorted power conditions. ...

2013-04-29T23:59:59.000Z

328

Cellular telephone-based wide-area radiation detection network  

DOE Patents (OSTI)

A network of radiation detection instruments, each having a small solid state radiation sensor module integrated into a cellular phone for providing radiation detection data and analysis directly to a user. The sensor module includes a solid-state crystal bonded to an ASIC readout providing a low cost, low power, light weight compact instrument to detect and measure radiation energies in the local ambient radiation field. In particular, the photon energy, time of event, and location of the detection instrument at the time of detection is recorded for real time transmission to a central data collection/analysis system. The collected data from the entire network of radiation detection instruments are combined by intelligent correlation/analysis algorithms which map the background radiation and detect, identify and track radiation anomalies in the region.

Craig, William W. (Pittsburg, CA); Labov, Simon E. (Berkeley, CA)

2009-06-09T23:59:59.000Z

329

High Energy Wide Area Blunt Impact on Composite Aircraft Structures /  

E-Print Network (OSTI)

specimen thickness and layup, impactor geometry, material,event. Panel geometry and layup was designed and reviewed atskin that was the same layup and thickness of the stringers.

DeFrancisci, Gabriela K.

2013-01-01T23:59:59.000Z

330

Securing Wide Area Measurement Systems | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

measurement system (WAMS) security conducted by Pacific Northwest National Laboratory (PNNL) as a project funded by the National SCADA Test Bed Program in cooperation with the...

331

Interactive large data exploration over the wide area  

Science Conference Proceedings (OSTI)

The top supercomputers typically have aggregate memories in excess of 100 TB, with simulations running on these systems producing datasets of comparable size. The size of these datasets and the speed with which they are produced define the minimum performance ... Keywords: large data, remote data exploration, visualization

Mark Hereld; Michael E. Papka; Joseph A. Insley; Michael L. Norman; Eric C. Olson; Rick Wagner

2011-07-01T23:59:59.000Z

332

Energy Analysis Department1 Implications of Wide-Area  

E-Print Network (OSTI)

This analysis was funded by the U.S. Department of Energy, Office of Electricity Delivery and Energy Reliability Department3 Project Overview Motivation: Concern that rapid fluctuations in photovoltaic plant (PV) output are a potential roadblock to PV integration - NERC stated that "PV installations can change output by +/- 70

333

A self-managing wide-area data streaming service  

Science Conference Proceedings (OSTI)

Efficient and robust data streaming services are a critical requirement of emerging Grid applications, which are based on seamless interactions and coupling between geographically distributed application components. Furthermore the dynamism of Grid ... Keywords: Autonomic computing, Grid computing, Model based online control, Scientific data streaming

Viraj Bhat; Manish Parashar; Hua Liu; Nagarajan Kandasamy; Mohit Khandekar; Scott Klasky; Sherif Abdelwahed

2007-12-01T23:59:59.000Z

334

Intrusion detection and monitoring for wireless networks.  

SciTech Connect

Wireless computer networks are increasing exponentially around the world. They are being implemented in both the unlicensed radio frequency (RF) spectrum (IEEE 802.11a/b/g) and the licensed spectrum (e.g., Firetide [1] and Motorola Canopy [2]). Wireless networks operating in the unlicensed spectrum are by far the most popular wireless computer networks in existence. The open (i.e., proprietary) nature of the IEEE 802.11 protocols and the availability of ''free'' RF spectrum have encouraged many producers of enterprise and common off-the-shelf (COTS) computer networking equipment to jump into the wireless arena. Competition between these companies has driven down the price of 802.11 wireless networking equipment and has improved user experiences with such equipment. The end result has been an increased adoption of the equipment by businesses and consumers, the establishment of the Wi-Fi Alliance [3], and widespread use of the Alliance's ''Wi-Fi'' moniker to describe these networks. Consumers use 802.11 equipment at home to reduce the burden of running wires in existing construction, facilitate the sharing of broadband Internet services with roommates or neighbors, and increase their range of ''connectedness''. Private businesses and government entities (at all levels) are deploying wireless networks to reduce wiring costs, increase employee mobility, enable non-employees to access the Internet, and create an added revenue stream to their existing business models (coffee houses, airports, hotels, etc.). Municipalities (Philadelphia; San Francisco; Grand Haven, MI) are deploying wireless networks so they can bring broadband Internet access to places lacking such access; offer limited-speed broadband access to impoverished communities; offer broadband in places, such as marinas and state parks, that are passed over by traditional broadband providers; and provide themselves with higher quality, more complete network coverage for use by emergency responders and other municipal agencies. In short, these Wi-Fi networks are being deployed everywhere. Much thought has been and is being put into evaluating cost-benefit analyses of wired vs. wireless networks and issues such as how to effectively cover an office building or municipality, how to efficiently manage a large network of wireless access points (APs), and how to save money by replacing an Internet service provider (ISP) with 802.11 technology. In comparison, very little thought and money are being focused on wireless security and monitoring for security purposes.

Thomas, Eric D.; Van Randwyk, Jamie A.; Lee, Erik J.; Stephano, Amanda (Indiana University); Tabriz, Parisa (University of Illinois at Urbana-Champaign); Pelon, Kristen (Cedarville University); McCoy, Damon (University of Colorado, Boulder); Lodato, Mark (Lafayette College); Hemingway, Franklin (University of New Mexico); Custer, Ryan P.; Averin, Dimitry (Polytechnic University); Franklin, Jason (Carnegie Mellon University); Kilman, Dominique Marie

2005-11-01T23:59:59.000Z

335

OIT Wireless Telemetry for Industrial Applications  

Science Conference Proceedings (OSTI)

The need for advanced wireless technology has been identified in the National Research Council publication (1) ''Manufacturing Process Controls for the Industries of the Future as a Critical Technology for the Future''. The deployment challenges to be overcome in order for wireless to be a viable option include: (1) eliminating interference (assuring reliable communications); (2) easing the deployment of intelligent, wireless sensors; (3) developing reliable networks (robust architectures); (4) developing remote power (long-lasting and reliable); and (5) developing standardized communication protocols. This project demonstrated the feasibility of robust wireless sensor networks that could meet these requirements for the harsh environments common to the DOE/OIT Industries of the Future. It resulted in a wireless test bed that was demonstrated in a paper mill and a steel plant. The test bed illustrated key protocols and components that would be required in a real-life, wireless network. The technologies for low power connectivity developed and demonstrated at the plant eased fears that the radios would interfere with existing control equipment. The same direct sequence, spread spectrum (DSSS) technology that helped assure the reliability of the connection also demonstrated that wireless communication was feasible in these plants without boosting the transmitted power to dangerous levels. Our experience and research have indicated that two key parameters are of ultimate importance: (1) reliability and (2) inter-system compatibility. Reliability is the key to immediate acceptance among industrial users. The importance cannot be overstated, because users will not tolerate an unreliable information network. A longer term issue that is at least as important as the reliability of a single system is the inter-system compatibility between these wireless sensor networks and other wireless systems that are part of our industries. In the long run, the ability of wireless sensor networks to operate cooperatively in an environment that includes wireless LANs, wireless headsets, RF heating, wireless crane controls and many other users of the electromagnetic spectrum will probably be the most important issue we can address. A network of units (Figure 1) has been developed that demonstrates the feasibility of direct-sequence spread spectrum wireless sensor networking for industrial environments. The hardware consists of a group of reprogrammable transceivers that can act as sensor nodes or network nodes or both. These units and the team that built them are the heart of a test bed development system that has been used successfully in demonstrations at various industrial sites. As previously reported, these units have been successfully tested at a paper mill. More recently, these units were utilized in a permanent installation at a steel mill. Both of these applications demonstrated the ease with which a new network could be installed, and the reality that DSSS units can operate successfully in plants where narrow band transmitters had previously caused interference with plant operations.

Manges, WW

2002-09-03T23:59:59.000Z

336

Federal Energy Management Program: FEMP Technology Brief: Wireless Sensor  

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

Wireless Sensor Networks for Data Centers to someone by E-mail Wireless Sensor Networks for Data Centers to someone by E-mail Share Federal Energy Management Program: FEMP Technology Brief: Wireless Sensor Networks for Data Centers on Facebook Tweet about Federal Energy Management Program: FEMP Technology Brief: Wireless Sensor Networks for Data Centers on Twitter Bookmark Federal Energy Management Program: FEMP Technology Brief: Wireless Sensor Networks for Data Centers on Google Bookmark Federal Energy Management Program: FEMP Technology Brief: Wireless Sensor Networks for Data Centers on Delicious Rank Federal Energy Management Program: FEMP Technology Brief: Wireless Sensor Networks for Data Centers on Digg Find More places to share Federal Energy Management Program: FEMP Technology Brief: Wireless Sensor Networks for Data Centers on

337

Building Technologies Office: Open-Standard Wireless Controllers for Water  

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

Open-Standard Wireless Open-Standard Wireless Controllers for Water Heaters Research Project to someone by E-mail Share Building Technologies Office: Open-Standard Wireless Controllers for Water Heaters Research Project on Facebook Tweet about Building Technologies Office: Open-Standard Wireless Controllers for Water Heaters Research Project on Twitter Bookmark Building Technologies Office: Open-Standard Wireless Controllers for Water Heaters Research Project on Google Bookmark Building Technologies Office: Open-Standard Wireless Controllers for Water Heaters Research Project on Delicious Rank Building Technologies Office: Open-Standard Wireless Controllers for Water Heaters Research Project on Digg Find More places to share Building Technologies Office: Open-Standard Wireless Controllers for Water Heaters Research Project on

338

ISA Approves Standard for Wireless Automation in Process Control  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ISA Approves Standard for Wireless Automation in Process Control ISA Approves Standard for Wireless Automation in Process Control Applications ISA Approves Standard for Wireless Automation in Process Control Applications September 22, 2009 - 1:28pm Addthis September 22, 2009 On September 9, the Standards and Practices Board of the International Society for Automation (ISA) approved the ISA-100.11a wireless standard, "Wireless Systems for Industrial Automation: Process Control and Related Applications," making it an official ISA standard. The standard is intended to provide secure, reliable wireless operation for monitoring, alerting, and control applications. It enables robustness with non-ISA-compliant legacy wireless systems, coexistence and interoperability with other wireless devices, and robustness in harsh industrial

339

ISA Approves Standard for Wireless Automation in Process Control Applications  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ISA Approves Standard for Wireless Automation in Process Control Applications ISA Approves Standard for Wireless Automation in Process Control Applications September 22, 2009 On September 9, the Standards and Practices Board of the International Society for Automation (ISA) approved the ISA-100.11a wireless standard, "Wireless Systems for Industrial Automation: Process Control and Related Applications," making it an official ISA standard. The standard is intended to provide secure, reliable wireless operation for monitoring, alerting, and control applications. It enables robustness with non-ISA-compliant legacy wireless systems, coexistence and interoperability with other wireless devices, and robustness in harsh industrial environments. To meet the needs of industrial wireless users and operators of low-energy fixed, portable, and moving

340

THE FUTURE OF THE WIRELESS ART by Nikola Tesla  

E-Print Network (OSTI)

THE FUTURE OF THE WIRELESS ART by Nikola Tesla WIRELESS TELEGRAPHY & TELEPHONY By Walter W. Massie & Charles R. Underhill, 1908, pp. 67-71. Mr. Nikola Tesla, in a recent interview by the authors

Cetiner, Bedri A.

Note: This page contains sample records for the topic "wide area wireless" 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.


341

An energy efficient RF transceiver for wireless microsensor networks  

E-Print Network (OSTI)

A wireless microsensor network consists of a group of sensor nodes that are deployed remotely and used to relay sensing data to the end-user. Due to their remote deployment, large scale wireless sensor networks require a ...

Daly, Denis Clarke

2005-01-01T23:59:59.000Z

342

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

343

Wireless home automation networks: a survey of architectures and technologies  

Science Conference Proceedings (OSTI)

Wireless home automation networks comprise wireless embedded sensors and actuators that enable monitoring and control applications for home user comfort and efficient home management. This article surveys the main current and emerging solutions that ...

Carles Gomez; Josep Paradells

2010-06-01T23:59:59.000Z

344

Forecasting the evolution of wireless technologies: the Loglet analysis approach  

Science Conference Proceedings (OSTI)

Over the decades, wireless industry has experienced the revolutionary transition from the first generation (1G) to the second generation (2G) and towards the third (3G)/fourth (4G) generation wireless technologies. The increasing demands for ...

Hak Ju Kim

2012-06-01T23:59:59.000Z

345

Enhancing spectrum utilization through cooperation and cognition in wireless systems  

E-Print Network (OSTI)

We have seen a proliferation of wireless technologies and devices in recent years. The resulting explosion of wireless demand has put immense pressure on available spectrum. Improving spectrum utilization is therefore ...

Rahul, Hariharan Shankar, 1975-

2013-01-01T23:59:59.000Z

346

Predictors of Home-Based Wireless Security Matthew Hottell  

E-Print Network (OSTI)

Predictors of Home-Based Wireless Security Matthew Hottell Indiana University Drew Carter Indiana state of insecurity in home-based wireless networks? We examine the following factors: education, income

Hottell, Matt

347

Power Scheduling for Multi-Hop Wireless Networks  

E-Print Network (OSTI)

wireless communica- tions: Scaling laws and optimal operation,”wireless networks are particularly useful for first responders for disaster relief, and military operationswireless network is particularly useful for first responders for disaster relief, and military operations

Yu, Yuan

2009-01-01T23:59:59.000Z

348

Wide-Bandgap Semiconductors  

SciTech Connect

With the increase in demand for more efficient, higher-power, and higher-temperature operation of power converters, design engineers face the challenge of increasing the efficiency and power density of converters [1, 2]. Development in power semiconductors is vital for achieving the design goals set by the industry. Silicon (Si) power devices have reached their theoretical limits in terms of higher-temperature and higher-power operation by virtue of the physical properties of the material. To overcome these limitations, research has focused on wide-bandgap materials such as silicon carbide (SiC), gallium nitride (GaN), and diamond because of their superior material advantages such as large bandgap, high thermal conductivity, and high critical breakdown field strength. Diamond is the ultimate material for power devices because of its greater than tenfold improvement in electrical properties compared with silicon; however, it is more suited for higher-voltage (grid level) higher-power applications based on the intrinsic properties of the material [3]. GaN and SiC power devices have similar performance improvements over Si power devices. GaN performs only slightly better than SiC. Both SiC and GaN have processing issues that need to be resolved before they can seriously challenge Si power devices; however, SiC is at a more technically advanced stage than GaN. SiC is considered to be the best transition material for future power devices before high-power diamond device technology matures. Since SiC power devices have lower losses than Si devices, SiC-based power converters are more efficient. With the high-temperature operation capability of SiC, thermal management requirements are reduced; therefore, a smaller heat sink would be sufficient. In addition, since SiC power devices can be switched at higher frequencies, smaller passive components are required in power converters. Smaller heat sinks and passive components result in higher-power-density power converters. With the advent of the use of SiC devices it is imperative that models of these be made available in commercial simulators. This enables power electronic designers to simulate their designs for various test conditions prior to fabrication. To build an accurate transistor-level model of a power electronic system such as an inverter, the first step is to characterize the semiconductor devices that are present in the system. Suitable test beds need to be built for each device to precisely test the devices and obtain relevant data that can be used for modeling. This includes careful characterization of the parasitic elements so as to emulate the test setup as closely as possible in simulations. This report is arranged as follows: Chapter 2--The testing and characterization of several diodes and power switches is presented. Chapter 3--A 55-kW hybrid inverter (Si insulated gate bipolar transistor--SiC Schottky diodes) device models and test results are presented. A detailed description of the various test setups followed by the parameter extraction, modeling, and simulation study of the inverter performance is presented. Chapter 4--A 7.5-kW all-SiC inverter (SiC junction field effect transistors (JFET)--SiC Schottky diodes) was built and tested. The models built in Saber were validated using the test data and the models were used in system applications in the Saber simulator. The simulation results and a comparison of the data from the prototype tests are discussed in this chapter. Chapter 5--The duration test results of devices utilized in buck converters undergoing reliability testing are presented.

Chinthavali, M.S.

2005-11-22T23:59:59.000Z

349

Dynamic priority scheduling-based MAC for wireless sensor networks  

Science Conference Proceedings (OSTI)

In this paper, one of the most important issues supporting real-time QoS in wireless sensor networks is discussed, which is fundamentally a challenging problem. A novel MAC protocol based on dynamic priority scheduling is proposed for wireless sensor ... Keywords: MAC, Motes MICA 2, QoS, WSNs, dynamic priority scheduling, medium access control, quality of service, wireless networks, wireless sensor networks

Jiming Chen; Youxian Sun

2007-04-01T23:59:59.000Z

350

Optimization Online - Energy Savings in Wireless Mesh Networks in ...  

E-Print Network (OSTI)

Jan 24, 2011 ... Abstract: Energy consumption of communication systems is ... Keywords: Energy savings, wireless Mesh Networks, Green networking.

351

Radiological Areas  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Revision to Clearance Policy Associated with Recycle of Scrap Metals Originating from Revision to Clearance Policy Associated with Recycle of Scrap Metals Originating from Radiological Areas On July 13, 2000, the Secretary of Energy imposed an agency-wide suspension on the unrestricted release of scrap metal originating from radiological areas at Department of Energy (DOE) facilities for the purpose of recycling. The suspension was imposed in response to concerns from the general public and industry groups about the potential effects of radioactivity in or on material released in accordance with requirements established in DOE Order 5400.5, Radiation Protection of the Public and Environment. The suspension was to remain in force until DOE developed and implemented improvements in, and better informed the public about, its release process. In addition, in 2001 the DOE announced its intention to prepare a

352

A World Wide Web Update  

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

A World Wide Web Update The Center for Building Science now has a World Wide Web homepage accessible from the general LBL homepage. Through WWW and the Mosaic browser, Internet...

353

Efficient and robust multiple access control for wireless multimedia services  

Science Conference Proceedings (OSTI)

In this paper, we propose a new multiple access control (MAC) protocol for wireless distributed multimedia systems based on ATM, in which user demands are highly heterogeneous and can be classified as CBR, VBR, and ABR. Our protocol is motivated by two ... Keywords: FDD, TDMA, adaptive protocol, multiple access control, wireless ATM, wireless multimedia

Yu-Kwong Kwok; Vincent K. N. Lau

2000-10-01T23:59:59.000Z

354

Whole-home gesture recognition using wireless signals  

Science Conference Proceedings (OSTI)

This paper presents WiSee, a novel gesture recognition system that leverages wireless signals (e.g., Wi-Fi) to enable whole-home sensing and recognition of human gestures. Since wireless signals do not require line-of-sight and can traverse through walls, ... Keywords: gesture recognition, whole-home interaction, wireless sensing

Qifan Pu, Sidhant Gupta, Shyamnath Gollakota, Shwetak Patel

2013-09-01T23:59:59.000Z

355

Minimum-outage broadcast in wireless networks with fading channels  

Science Conference Proceedings (OSTI)

We consider the problem of cooperative broadcasting for minimum outage in wireless networks. We consider wireless multihop broadcast as a set of transmitters that transmit in a certain order. The receiving nodes are able to combine all the previous transmissions ... Keywords: broadcast, multicast, outage, wireless networks

Tolga Girici; Gulizar Duygu Kurt

2010-07-01T23:59:59.000Z

356

Security in Wireless Data Networks: A Survey Paper  

E-Print Network (OSTI)

Security in Wireless Data Networks: A Survey Paper Abdel-Karim R. Al Tamimi abdelkarim.tamimi@gmail.com Abstract Both security and wireless communication will remain an interesting subject for years to come jeopardizing the communicated content. This paper illustrates the key concepts of security, wireless networks

Jain, Raj

357

Why Mobile Wireless Carriers Share Networks and Services Provisioning  

Science Conference Proceedings (OSTI)

This paper provides a theory that empirically examines why mobile wireless carriers share the costs of building networks and provisioning wireless services. Of the cost drivers of network operators, the most influential on the industry's dynamics are ... Keywords: Active and Passive Infrastructure, Backhaul, Coverage, Network Sharing, Next-Generation Networks, Spectrum, Wireless Services Provisioning

Hemant K. Sabat

2010-07-01T23:59:59.000Z

358

A Uniform Balancing Energy Routing Protocol for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

In wireless sensor network, the power supply is, generally, a non-renewable battery. Consequently, energy effectiveness is a crucial factor. To maximize the battery life and therefore, the duration of network service, a robust wireless communication ... Keywords: Ad-hoc networks, Energy balancing, Energy efficiency, Sensor networks, Wireless communications

Ouadoudi Zytoune; Mohamed El Aroussi; Driss Aboutajdine

2010-10-01T23:59:59.000Z

359

A simple mechanism for capturing and replaying wireless channels  

Science Conference Proceedings (OSTI)

Physical layer wireless network emulation has the potential to be a powerful experimental tool. An important challenge in physical emulation, and traditional simulation, is to accurately model the wireless channel. In this paper we examine the possibility ... Keywords: channel capture, emulation, wireless

Glenn Judd; Peter Steenkiste

2005-08-01T23:59:59.000Z

360

Trust-Assisted Handover Approach in Hybrid Wireless Networks  

Science Conference Proceedings (OSTI)

In Next-Generation (NG) hybrid wireless networks, Mobile-Controlled Handover (MCHO) is expected to be employed as the handover control mechanism, in contrast to Network-Controlled Handover (NCHO) used in homogeneous wireless networks. As more independent ... Keywords: Cross-layer handover, Hybrid wireless networks, Multi-operator, Security-enhanced QoS, Service roaming, Trust relation

Mo Li; Kumbesan Sandrasegaran; Tracy Tung

2010-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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.


361

The use of MIMO technologies in wireless communication networks  

Science Conference Proceedings (OSTI)

This paper provides a detailed picture on computer networks and especially on wireless networks, focusing on specific characteristics of wireless systems. By using MIMO technology (Multiple Input Multiple Output), network logon ca be realized at distances ... Keywords: IEEE standards, MIMO technology, routers, wireless networks

Marius-Constantin O. S. Popescu; Nikos E. Mastorakis

2009-12-01T23:59:59.000Z

362

Hierarchical distributed data classification in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks promise an unprecedented opportunity to monitor physical environments via inexpensive wireless embedded devices. Given the sheer amount of sensed data, efficient classification of them becomes a critical task in many sensor network ... Keywords: C4.5, Classification, Decision tree, Wireless sensor network

Xu Cheng; Ji Xu; Jian Pei; Jiangchuan Liu

2010-07-01T23:59:59.000Z

363

Deploying a Wireless Sensor Network on an Active Volcano  

Science Conference Proceedings (OSTI)

Augmenting heavy and power-hungry data collection equipment with lighter, smaller wireless sensor network nodes leads to faster, larger deployments. Arrays comprising dozens of wireless sensor nodes are now possible, allowing scientific studies that ... Keywords: wireless sensor networks, sensor network applications, sensor network nodes, volcano research

Geoffrey Werner-Allen; Konrad Lorincz; Matt Welsh; Omar Marcillo; Jeff Johnson; Mario Ruiz; Jonathan Lees

2006-03-01T23:59:59.000Z

364

Coordination in wireless sensor-actuator networks: A survey  

Science Conference Proceedings (OSTI)

Wireless Sensor-Actuator Networks (WSANs) have a myriad of applications, ranging from pacifying bulls to controlling light intensity in homes automatically. An important aspect of WSANs is coordination. Unlike conventional Wireless Sensor Networks (WSNs), ... Keywords: Actuators, Coordination, Energy efficiency, Wireless sensor and actuator networks

Hamidreza Salarian; Kwan-Wu Chin; Fazel Naghdy

2012-07-01T23:59:59.000Z

365

Sensors and Actuators B 127 (2007) 5462 Wireless Joule nanoheaters  

E-Print Network (OSTI)

for wireless Joule heaters; this model is employed in Section 3 in order, first, to maximize the temperature heaters, in this section we discuss an electrical model for toroidal wireless Joule heaters. 2.1. Toroidal model for wireless Joule heaters Fig. 2 shows the resulting electrical model of the nanoring. Under

Wang, Zhong L.

366

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

367

Realizing and benchmarking broadcast algorithms in wireless mesh networks  

Science Conference Proceedings (OSTI)

Broadcasting by flooding causes the broadcast storm problem in multi-hop wireless networks. This problem becomes more likely in a wireless mesh network (WMN) because WMNs can bridge wired LANs, increasing broadcast traffic and collision probability. ... Keywords: 802.11s, Broadcast algorithm, Mesh networks, Multi-hop wireless networks, WMN

Ying-Dar Lin; Shun-Lee Chang; Shi-Hung Tao; Jui-Hung Yeh

2011-07-01T23:59:59.000Z

368

A virtual infrastructure for large-scale wireless sensor networks  

Science Conference Proceedings (OSTI)

The primary goal of a wireless sensor network is to collect useful information from the network. Most wireless sensor networks are assumed that the number of nodes are very large and they should operate with confined resources. Consequently it is important ... Keywords: Data collection, Railroad, Topology, Wireless sensor networks

Jeong-Hun Shin; Daeyeon Park

2007-10-01T23:59:59.000Z

369

A topology-independent scheduling scheme for wireless mesh networks  

Science Conference Proceedings (OSTI)

To meet the needs of wireless broadband access, the IEEE 802.16 protocol for wireless metropolitan networks had been recently standardized. The medium access control (MAC) layer of the IEEE 802.16 has point-to-multipoint (PMP) mode and mesh mode. Previous ... Keywords: 802.16, MAC, TDMA, mesh networks, scheduling sheme, wireless

V. Loscri

2007-10-01T23:59:59.000Z

370

MAC protocols over wireless mesh networks: problems and perspective  

Science Conference Proceedings (OSTI)

The wireless mesh network (WMN) has been an emerging technology in recent years. Because the transmission medium used in networking backhaul access points (APs) is radio, the wireless mesh network is not only easy and cost effective in deployment, but ... Keywords: Coordinated distributed scheduling, IEEE 802.11, IEEE 802.16, MAC, TDMA, Wireless mesh networks (WMNs)

V. Loscr?

2008-03-01T23:59:59.000Z

371

Connectivity, throughput, and end-to-end latency in infrastructureless wireless Networks with beamforming-enabled devices  

E-Print Network (OSTI)

Infrastructureless wireless networks are an important class of wireless networks best fitted to operational situations with temporary, localized demand for communication ability. These networks are composed of wireless ...

Carey, Matthew F. (Matthew Francis)

2011-01-01T23:59:59.000Z

372

Wireless Demand Response Controls for HVAC Systems  

Science Conference Proceedings (OSTI)

The objectives of this scoping study were to develop and test control software and wireless hardware that could enable closed-loop, zone-temperature-based demand response in buildings that have either pneumatic controls or legacy digital controls that cannot be used as part of a demand response automation system. We designed a SOAP client that is compatible with the Demand Response Automation Server (DRAS) being used by the IOUs in California for their CPP program, design the DR control software, investigated the use of cellular routers for connecting to the DRAS, and tested the wireless DR system with an emulator running a calibrated model of a working building. The results show that the wireless DR system can shed approximately 1.5 Watts per design CFM on the design day in a hot, inland climate in California while keeping temperatures within the limits of ASHRAE Standard 55: Thermal Environmental Conditions for Human Occupancy.

Federspiel, Clifford

2009-06-30T23:59:59.000Z

373

Opportunities of Wireless Sensors and Controls for Building Operation  

SciTech Connect

This paper characterizes commercially available wireless technologies that are suitable for use in commercial buildings. It describes two demonstration projects of wireless sensors and their integration into existing control networks, and discusses their cost per sensor, their ease of installation, and their reliability. The author will discuss the operational and energy benefits of the wireless sensors and report on the energy and cost savings estimates. The paper will conclude with some practical considerations for the installation of wireless sensors and provide a future outlook for wireless technologies in buildings applications.

Kintner-Meyer, Michael CW

2004-09-30T23:59:59.000Z

374

Integrated mobile GIS and wireless internet map servers for environmental monitoring and management  

E-Print Network (OSTI)

ABSTRACT: With the progress of mobile GIS technology there is a great potential for adopting wireless communications and Internet mapping services for regional environmental management programs and natural habitat conservation. This paper provides an overview of a NASA-funded research project that focuses on the development of mobile GIS tools and wireless Internet Map Server (IMS) services to facilitate environmental monitoring and management tasks. By developing and testing wireless web-based map/image servers, mobile GIS applications, and global positional systems (GPS), this research created an integrated software/hardware infrastructure for a prototype mobile GIS application. The mobile GIS prototype allows multiple resource managers and park rangers to access large-size, remotely sensed images and GIS layers from a portable web server mounted in a vehicle. Users can conduct real-time spatial data updates and/or submit changes back to the web server over the wireless local area network (WLAN). This paper discusses in general the major components of mobile GIS, their current technological limitations, and potential problems during implementation. Key research agenda for mobile GIS are identified with suggestions for future research and development.

Ming-hsiang Tsou

2004-01-01T23:59:59.000Z

375

DSTiPE Algorithm for Fuzzy Spatio-Temporal Risk Calculation in Wireless Environments  

SciTech Connect

Time and location data play a very significant role in a variety of factory automation scenarios, such as automated vehicles and robots, their navigation, tracking, and monitoring, to services of optimization and security. In addition, pervasive wireless capabilities combined with time and location information are enabling new applications in areas such as transportation systems, health care, elder care, military, emergency response, critical infrastructure, and law enforcement. A person/object in proximity to certain areas for specific durations of time may pose a risk hazard either to themselves, others, or the environment. This paper presents a novel fuzzy based spatio-temporal risk calculation DSTiPE method that an object with wireless communications presents to the environment. The presented Matlab based application for fuzzy spatio-temporal risk cluster extraction is verified on a diagonal vehicle movement example.

Kurt Derr; Milos Manic

2008-09-01T23:59:59.000Z

376

An energy efficient clustering protocol for routing in Wireless Sensor Network  

Science Conference Proceedings (OSTI)

In Wireless Sensor Network (WSN), the power supply is generally a non-renewable battery, consequently, energy effectiveness is a crucial factor. To maximise the battery life and therefore the duration of network service, a robust wireless ... Keywords: WSNs, battery life, dynamic clustering, energy efficiency, energy efficient clustering, network lifetime, simulation, wireless communications, wireless networks, wireless sensor networks

Ouadoudi Zytoune; Mohamed El Aroussi; Driss Aboutajdine

2011-12-01T23:59:59.000Z

377

TESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS  

E-Print Network (OSTI)

TESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS Ljiljana Trajkovi Communication Networks;March 12, 2004 Kwantlen College Ljiljana Trajkovic, Simon Fraser University 2 Road map Tesla in 1890's Alternate currents Tesla left Edison in 1885. He formed his own laboratory "Tesla Electric Company" in 1887

Trajkovic, Ljiljana

378

Wireless Made Easy, 1st edition  

Science Conference Proceedings (OSTI)

This is not a book for anengineer studying for a communications theory class. This book will explain in clear, simple terms the wireless technologies and its inter-relationships, and serve as an effective guide for anyone wishing to implement, deploy ...

Teik-Kheong Tan

2013-05-01T23:59:59.000Z

379

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

380

CMOS wireless transceivers: the new wave  

Science Conference Proceedings (OSTI)

A new generation of wireless transceivers is being intergrated into CMOS IC technology, which so far has been used mainly to realize digital and mixed analog-digital baseband circuits. This article reviews some of the RF CMOS circuit design techniques, ...

A. A. Abidi

1999-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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.


381

Automatic decentralized clustering for wireless sensor networks  

Science Conference Proceedings (OSTI)

We propose a decentralized algorithm for organizing an ad hoc sensor network into clusters. Each sensor uses a random waiting timer and local criteria to determine whether to form a new cluster or to join a current cluster. The algorithm operates without ... Keywords: clustering algorithm, random waiting timer, wireless sensor networks

Chih-Yu Wen; William A. Sethares

2005-10-01T23:59:59.000Z

382

Energy Cooperation in Energy Harvesting Wireless Communications  

E-Print Network (OSTI)

Energy Cooperation in Energy Harvesting Wireless Communications Berk Gurakan1 , Omur Ozel1 , Jing node, a relay node and a destination node where the source and the relay can harvest energy from the nature. Energy required for communication arrives (is harvested) at the transmitter and an unlimited

Ulukus, Sennur

383

Marginal Expense Oil Well Wireless Surveillance (MEOWWS)  

SciTech Connect

The objective of this study was to identify and field test a new, low cost, wireless oil well surveillance system. A variety of suppliers and technologies were considered. One supplier and system was chosen that was low cost, new to the oil field, and successfully field tested.

Nelson, Donald G.

2002-03-11T23:59:59.000Z

384

Multiagent Coordination in Microgrids via Wireless Networks  

E-Print Network (OSTI)

Multiagent Coordination in Microgrids via Wireless Networks Hao Liang, BBCR Group, University of Waterloo Abstract The future smart grid is expected to be an integration of intelligent microgrids featured to facilitate pervasive microgrid monitoring and control at a high flexibility and low deployment cost. In order

Zhuang, Weihua

385

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

386

Energy Conservation Utilizing Wireless Dimmable Lighting Control  

E-Print Network (OSTI)

Energy Conservation Utilizing Wireless Dimmable Lighting Control in a Shared-Space Office Yao preference and requirements vary · among individuals · with tasks · with time and age Lighting satisfaction occupants sharing an office? · Ethernet infrastructure How will the energy savings and user satisfaction

Agogino, Alice M.

387

PIPENETa wireless sensor network for pipeline monitoring  

Science Conference Proceedings (OSTI)

US water utilities are faced with mounting operational and maintenance costs as a result of aging pipeline infrastructures. Leaks and ruptures in water supply pipelines and blockages and overflow events in sewer collectors cost millions of dollars a ... Keywords: Intel mote platforms, pipeline monitoring, water supply systems, wireless sensor networks

Ivan Stoianov; Lama Nachman; Sam Madden; Timur Tokmouline

2007-04-01T23:59:59.000Z

388

Southwest Area Corridor Map | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Map DOE Designates Southwest Area and Mid-Atlantic Area National Interest Electric Transmission Corridors October 2, 2007 Proposed Energy Transport Corridors: West-wide energy...

389

Iterative Collision Resolution in Wireless Networks  

E-Print Network (OSTI)

With the growing popularity of smart phones and tablets, development of multimedia applications is on the rise. Speedy transmission of this massive amount information is already pushing the limits of the capacity of wireless networks, and in upcoming years wireless data traffic is projected to continue increasing dramatically. Advances in wireless network throughput are necessary to keep up with society’s data demands. In an uncoordinated wireless communications system, transmissions collide and interfere as multiple users transmit data to a central receiver. Slotted-ALOHA, the conventional method that schedules user transmissions, has only 37% throughput efficiency. However, theoretical results in recent studies suggest that scheduling transmissions over a number of random, fixed timeslots and employing iterative collision resolution techniques achieves optimal throughput efficiency of approximately 100%. This research considers how real-world conditions affect these theoretical results. A MATLAB model was developed create random graphs, representing users transmitting packets over such timeslots, and the packets were resolved by this method. This model was simulated extensively, representing networks of up to 10,000 users over 10,000 to 15,000 timeslots, and the number of packets resolved in each iteration was measured. These simulations have generated empirical data that backs up the theoretical claim. The distribution of the number of packets resolved also led to modifications of the current model to increase the percentage of packets resolved in each iteration. Furthermore, by investigating low density parity check coding techniques, other modifications to the current model can optimize the throughput over several consecutive transmissions where unresolved packets are resent with higher probability of recovery. These results demonstrate the potential of this method in handling uncoordinated transmissions in communications systems, even in the presence of finite conditions. This suggests that this method could eventually be employed in actual wireless systems.

Stuckman, Katherine Christine

2013-05-01T23:59:59.000Z

390

Study of joint routing and wireless charging strategies in sensor networks  

Science Conference Proceedings (OSTI)

In recent years, wireless charging (a.k.a. wireless energy transferring) [3] has been recognized as a promising alternative to address the energy constraint challenge in wireless sensor networks. Comparing to the conventional energy conservation or harvesting ...

Zi Li; Yang Peng; Wensheng Zhang; Daji Qiao

2010-08-01T23:59:59.000Z

391

Powering mm-Size Wireless Implants for Brain-Machine Interfaces  

E-Print Network (OSTI)

as well. Due to the wireless operation and the limited spacelink is needed. Complete wireless operation is preferred foroperation) [O’Driscoll09, Xiao10]. Table 1.2 summarizes representative wireless

Mark, Michael

2011-01-01T23:59:59.000Z

392

Health Monitoring of Drive Connected Three-Phase Induction Motors ----- From Wired Towards Wireless Sensor Networks  

E-Print Network (OSTI)

167±27 mV/g. (e) Operation of the Wireless Sensor Node: Thethe operation of the sensor and the wireless communication.Wireless Sensor Node..99 Hardware..100 Operation..

Xue, Xin

2009-01-01T23:59:59.000Z

393

Auction-based Bandwidth Allocation Mechanisms for Wireless Future Internet  

E-Print Network (OSTI)

An important aspect of the Future Internet is the efficient utilization of (wireless) network resources. In order for the - demanding in terms of QoS - Future Internet services to be provided, the current trend is evolving towards an "integrated" wireless network access model that enables users to enjoy mobility, seamless access and high quality of service in an all-IP network on an "Anytime, Anywhere" basis. The term "integrated" is used to denote that the Future Internet wireless "last mile" is expected to comprise multiple heterogeneous geographically coexisting wireless networks, each having different capacity and coverage radius. The efficient management of the wireless access network resources is crucial due to their scarcity that renders wireless access a potential bottleneck for the provision of high quality services. In this paper we propose an auction mechanism for allocating the bandwidth of such a network so that efficiency is attained, i.e. social welfare is maximized. In particular, we propose a...

Dramitinos, Emmanouil

2010-01-01T23:59:59.000Z

394

Network Coding based Information Security in Multi-hop Wireless Networks.  

E-Print Network (OSTI)

??Multi-hop Wireless Networks (MWNs) represent a class of networks where messages are forwarded through multiple hops of wireless transmission. Applications of this newly emerging communication… (more)

Fan, Yanfei

2010-01-01T23:59:59.000Z

395

Modeling the Behavior of an Electronically Switchable Directional Antenna for Wireless Sensor Networks.  

E-Print Network (OSTI)

??Reducing power consumption is among the top concerns in Wireless Sensor Networks, as the lifetime of a Wireless Sensor Network depends on its power consumption.… (more)

Silase, Geletu

2011-01-01T23:59:59.000Z

396

Microsoft PowerPoint - INL_Wireless Charging testing of Plugless...  

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

Testing Results: PLUGLESS TM Wireless gov Testing Results: PLUGLESS Wireless Charging System by Evatran Group Inc. www.inl.g w Richard "Barney" Carlson October 2013 INL...

397

Best Practices Guide to Securing Wireless Substation Applications  

Science Conference Proceedings (OSTI)

The use of wireless communications in substations raises a number of security concerns. This report, an updated version of EPRI report 1013810) identifies wireless security best practices for electric substation applications, giving special consideration to a defense-in-depth approach to wireless security. The emphasis is on technical, administrative, and operational security controls. In addition to discussing the defense-in-depth concept, the report also examines training activities and rogue device de...

2009-02-18T23:59:59.000Z

398

Final Scientific Report - Wireless and Sensing Solutions Advancing Industrial Efficiency  

Science Conference Proceedings (OSTI)

The project team's goal for the Wireless and Sensing Solution Advancing Industrial Efficiency award (DE-FC36-04GO14002) was to develop, demonstrate, and test a number of leading edge technologies that could enable the emergence of wireless sensor and sampling systems for the industrial market space. This effort combined initiatives in advanced sensor development, configurable sampling and deployment platforms, and robust wireless communications to address critical obstacles in enabling enhanced industrial efficiency.

Budampati, Rama; McBrady, Adam; Nusseibeh, Fouad

2009-09-28T23:59:59.000Z

399

System Specification for the Wireless Programmable Process Monitoring System  

Science Conference Proceedings (OSTI)

An automated method for acquiring sensor and gauge data in nuclear power plants would enhance real-time system and process diagnostics, improve plant operation, and reduce operation and maintenance costs. This project evaluates the feasibility of wireless data acquisition approaches, ultimately focusing on the wireless programmable process monitoring system (WPPMS). The WPPMS will employ intelligent sensor gauge acquisition interfaces, hand-held computers, and wireless modems, allowing configuration for ...

1993-06-01T23:59:59.000Z

400

Wireless Technology Conference: November 19-21, 2002  

Science Conference Proceedings (OSTI)

Wireless technology is rapidly evolving and the drivers are new developments, opportunities for return on investment, and ability to monitor equipment that would be too expensive to instrument. Electric utilities, along with other industries, have adopted wireless communications to improve and enhance their business. However, wireless technology has many under-utilized applications in the electric power industry, including remote equipment/systems monitoring for condition-based maintenance, electronic pe...

2003-07-08T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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.


401

A survey on emerging broadband wireless access technologies  

Science Conference Proceedings (OSTI)

Wireless broadband technologies provide ubiquitous broadband access to wireless users, enabling services that were available only to wireline users. In this paper, we summarize emerging wireless broadband access technologies, ranging from WLANs to satellite ... Keywords: HAPs, HiperACCESS, HiperLAN, HiperMAN, IEEE 802.11, IEEE 802.16, IEEE 802.20, IEEE 802.22, Satellite, WLAN, WMAN, WWAN, WiBro, WiFi, WiMAX

Mehmet S. Kuran; Tuna Tugcu

2007-08-01T23:59:59.000Z

402

Robust Clock Synchronization Methods for Wireless Sensor Networks  

E-Print Network (OSTI)

Wireless sensor networks (WSNs) have received huge attention during the recent years due to their applications in a large number of areas such as environmental monitoring, health and traffic monitoring, surveillance and tracking, and monitoring and control of factories and home appliances. Also, the rapid developments in the micro electro-mechanical systems (MEMS) technology and circuit design lead to a faster spread and adoption of WSNs. Wireless sensor networks consist of a number of nodes featured in general with energy-limited sensors capable of collecting, processing and transmitting information across short distances. Clock synchronization plays an important role in designing, implementing, and operating wireless sensor networks, and it is essential in ensuring a meaningful information processing order for the data collected by the nodes. Because the timing message exchanges between different nodes are affected by unknown possibly time-varying network delay distributions, the estimation of clock offset parameters represents a challenge. This dissertation presents several robust estimation approaches of the clock offset parameters necessary for time synchronization of WSNs via the two-way message exchange mechanism. In this dissertation the main emphasis will be put on building clock phase offset estimators robust with respect to the unknown network delay distributions. Under the assumption that the delay characteristics of the uplink and the downlink are asymmetric, the clock offset estimation method using the bootstrap bias correction approach is derived. Also, the clock offset estimator using the robust Mestimation technique is presented assuming that one underlying delay distribution is mixed with another delay distribution. Next, although computationally complex, several novel, efficient, and robust estimators of clock offset based on the particle filtering technique are proposed to cope with the Gaussian or non-Gaussian delay characteristics of the underlying networks. One is the Gaussian mixture Kalman particle filter (GMKPF) method. Another is the composite particle filter (CPF) approach viewed as a composition between the Gaussian sum particle filter and the KF. Additionally, the CPF using bootstrap sampling is also presented. Finally, the iterative Gaussian mixture Kalman particle filter (IGMKPF) scheme, combining the GMKPF with a procedure for noise density estimation via an iterative mechanism, is proposed.

Lee, Jae Han

2010-08-01T23:59:59.000Z

403

Multi-channel reliability and spectrum usage in real homes: empirical studies for home-area sensor networks  

Science Conference Proceedings (OSTI)

Home area networks (HANs) consisting of wireless sensors have emerged as the enabling technology for important applications such as smart energy. These applications impose unique QoS constraints, requiring low data rates but high network reliability ...

Mo Sha; Gregory Hackmann; Chenyang Lu

2011-06-01T23:59:59.000Z

404

Prototype system brings advantages of wireless technology to secure  

National Nuclear Security Administration (NNSA)

Prototype system brings advantages of wireless technology to secure Prototype system brings advantages of wireless technology to secure environment | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Prototype system brings advantages of wireless technology ... Prototype system brings advantages of wireless technology to secure environment

405

Microsoft Word - Wireless Automation World for OE FINAL.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Automation World Features New White Paper on Wireless Security, Interviews Authors Automation World Features New White Paper on Wireless Security, Interviews Authors April 16, 2009 The April 2009 issue of Automation World magazine features the white paper Wireless Systems Considerations When Implementing NERC Critical Infrastructure Protection Standards. The paper addresses wireless protection issues arising from requirements of the Critical Infrastructure Protection (CIP) Standards for the electricity sector, developed by the North American Electric Reliability Corporation (NERC). The CIP standards require entities to monitor and control all electronic access to a company's electronic security perimeter, but this requirement becomes difficult to implement when it

406

Microsoft Word - Wireless Automation World for OE FINAL.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Automation World Features New White Paper on Wireless Security, Interviews Authors April 16, 2009 The April 2009 issue of Automation World magazine features the white paper...

407

WIRELESS MICROWAVE ACOUSTIC SENSOR SYSTEM FOR CONDITION MONITORING...  

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

WIRELESS MICROWAVE ACOUSTIC SENSOR SYSTEM FOR CONDITION MONITORING IN POWER PLANT ENVIRONMENTS Project DE-FE0007379TDD NETL, Morgantown, WV, March 14, 2012. DOE NETL Program:...

408

Tracking-history-based Sleeping Policies for Wireless Sensor Networks.  

E-Print Network (OSTI)

??A wireless sensor network can be used to track an object. Every sensor has limited energy and detecting range. In order to conserve energy, sensors… (more)

Gau, Ding-hau

2009-01-01T23:59:59.000Z

409

Fundamental limits and insights: from wireless communication to DNA sequencing  

E-Print Network (OSTI)

Fundamental limits and insights: from wireless communicationDavid Aldous Fall 2012 Fundamental limits and insights: fromGuy Bresler Abstract Fundamental limits and insights: from

Bresler, Guy

2012-01-01T23:59:59.000Z

410

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

411

Power-Rate-Distortion Analysis Of Wireless Visual Sensor Network.  

E-Print Network (OSTI)

??The emergence of low-cost and mature technologies in wireless communication, visual sensor devices, and digtial signal processing, facilitates the potential of wirelss sensor networks (WSN).… (more)

Shaw, William

2008-01-01T23:59:59.000Z

412

Low-Cost Printable Wireless Sensors for Buildings Applications  

Low-Cost Printable Wireless Sensors for Buildings Applications Note: The technology described above is an early stage opportunity. Licensing rights to this ...

413

X-by-wireless: a novel approach to vehicle control  

E-Print Network (OSTI)

As the cost of wireless devices approaches zero, it becomes more feasible to replace wires with wireless communication. Vehicle wiring harnesses are traditionally wired to communicate both power and information simultaneously, resulting in separate circuits for each vehicle device. X-By-Wireless seeks to supplant this configuration in favor of a shared power bus and wireless inter-component communication. In doing so, we can recognize a number of benefits such as reduced weight and increased reliability, flexibility, and upgradeability. However, this introduces new problems such as longer transmission delays, interference and encryption issues, fusing difficulties, and public perception regarding safety. The purpose of this thesis is to define the X-By-Wireless concept and to investigate the benefits and drawbacks in implementing X-By-Wireless. Furthermore, we do a theoretical and case study analysis to expand upon the weight reduction benefit so as to quantify the expected improvements. We also address each of the challenges presented by X-By-Wireless and integrate them into a proposed circuit that is capable of performing all the necessary functions of wireless control, wireless sensing, and fusing. We find that the proposed device can be mass-produced as an effective solution that meets the speed and security constraints necessary for most vehicle components.

Hoelscher, David Louis

2006-05-01T23:59:59.000Z

414

Prototype system brings advantages of wireless technology to...  

National Nuclear Security Administration (NNSA)

the ability to use this type of wireless technology for radiation monitoring in nuclear facilities, where monitoring is essential for operating the equipment safely and...

415

Design Considerations for Solar Energy Harvesting Wireless Embedded Systems  

E-Print Network (OSTI)

and J. Schiller, “Utilizing solar power in wireless sensormodule can also learn the solar power availability pattern,routing choices, available solar power at more than just one

Raghunathan, Vijay; Kansal, Aman; Hsu, Jason; Friedman, Jonathan K; Srivastava, Mani B

2005-01-01T23:59:59.000Z

416

Radio channel modeling for mobile ad hoc wireless networks .  

E-Print Network (OSTI)

??The radio channel places fundamental limitations on the performance of mobile ad hoc wireless networks. In the mobile radio environment, fading due to multipath delay… (more)

Sng, Sin Hie

2004-01-01T23:59:59.000Z

417

Energy Efficient Distributed Data Fusion In Multihop Wireless Sensor Networks  

E-Print Network (OSTI)

addresses a transmission energy problem for wireless sensoranalog case. The energy planning problem will be formulatedrest of this paper. Energy Planning Problem Formulation and

Huang, Yi

2010-01-01T23:59:59.000Z

418

Energy management in wireless healthcare systems using dynamic task assignment.  

E-Print Network (OSTI)

??Wireless healthcare systems are hierarchical and heterogeneous in nature with components that have different energy and performance capabilities. Ensuring the optimal energy consumption across all… (more)

Aghera, Priti

2010-01-01T23:59:59.000Z

419

Announcing $4 Million For Wireless EV Charging | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Addthis The Energy Department announced up to 4 million to develop wireless chargers for electric vehicles. | Graphic courtesy of the Vehicle Technologies Program. The Energy...

420

Distributed Energy-Saving Algorithms for Wireless Networks.  

E-Print Network (OSTI)

??The rapid growth of wireless networks has led to increasing interest in designing new algorithms that can efficiently reduce the energy consumption of routers and… (more)

Zazo Ruiz, Javier

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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.


421

Wireless Communication for Secured Firing and Control Systems of ...  

Science Conference Proceedings (OSTI)

Wired connections between the moving equipment and the central control unit have always been an operation and maintenance concern. Wireless networks ...

422

Traffic Management and Net Neutrality in Wireless Networks  

E-Print Network (OSTI)

with desired network operation in wireless networks than inwireless devices have a greater ability to negatively interfere with desired network operation

Jordan, Scott

2011-01-01T23:59:59.000Z

423

Microsoft Word - Wireless - Eagle Junction CX.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Description of the Proposed Action: The proposed project includes construction and operation of Clearwire wireless facilities on the Chemawa-Salem 1 & 2 transmission line,...

424

Analyzing Options for Airborne Emergency Wireless Communications  

SciTech Connect

In the event of large-scale natural or manmade catastrophic events, access to reliable and enduring commercial communication systems is critical. Hurricane Katrina provided a recent example of the need to ensure communications during a national emergency. To ensure that communication demands are met during these critical times, Idaho National Laboratory (INL) under the guidance of United States Strategic Command has studied infrastructure issues, concerns, and vulnerabilities associated with an airborne wireless communications capability. Such a capability could provide emergency wireless communications until public/commercial nodes can be systematically restored. This report focuses on the airborne cellular restoration concept; analyzing basic infrastructure requirements; identifying related infrastructure issues, concerns, and vulnerabilities and offers recommended solutions.

Michael Schmitt; Juan Deaton; Curt Papke; Shane Cherry

2008-03-01T23:59:59.000Z

425

Fundamental Tradeoffs on Green Wireless Networks  

E-Print Network (OSTI)

Traditional design of mobile wireless networks mainly focuses on ubiquitous access and large capacity. However, as energy saving and environmental protection become a global demand and inevitable trend, wireless researchers and engineers need to shift their focus to energy-efficiency oriented design, that is, green radio. In this paper, we propose a framework for green radio research and integrate the fundamental issues that are currently scattered. The skeleton of the framework consists of four fundamental tradeoffs: deployment efficiency - energy efficiency tradeoff, spectrum efficiency - energy efficiency tradeoff, bandwidth - power tradeoff, and delay - power tradeoff. With the help of the four fundamental tradeoffs, we demonstrate that key network performance/cost indicators are all stringed together.

Chen, Yan; Xu, Shugong; Li, Geoffrey Ye

2011-01-01T23:59:59.000Z

426

Leveraging Utility Assets in Wireless Communications  

Science Conference Proceedings (OSTI)

Utilities have a lot of attractive assets--hard, soft, and intangible, which can be shared for profit with the telecommunications industry. Specifically, PCS providers are a very attractive source of revenue for utilities. This report, which is a companion piece to other EPRI reports on wireless technologies and products, reviews how utilities can position themselves to derive revenue from the intrinsic value of their assets.

1997-02-07T23:59:59.000Z

427

World Wide Web Information Servers  

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

World Wide Web Information Servers World Wide Web Information Servers Lawrence Berkeley Laboratory recently announced a gopher and World Wide Web site. To get to the web site, telnet to www.lbl.gov, login: www. Access is provided to LBL's gopher, library catalog, and publication list. The Center is funding the implementation of a WWW network node for on-line access to publications, databases, and documents full of hypermedia links to other documents or information systems from the Energy & Environment Division. Full implementation is expected by May 1994, and will include access to a variety of information from all the research programs and centers. The technology transfer project calls for this newsletter to be published on WWW using the Mosaic interface under development at the National Center

428

Wireless Information Transfer with Opportunistic Energy Harvesting  

E-Print Network (OSTI)

Energy harvesting is a promising solution to prolong the operation of energy-constrained wireless networks. In particular, scavenging energy from ambient radio signals, namely wireless energy harvesting (WEH), has recently drawn significant attention. In this paper, we consider a point-to-point wireless link over the flat-fading channel subject to the time-varying co-channel interference. It is assumed that the receiver has no fixed power supplies and thus needs to replenish energy via WEH from the unintended interference and/or the intended signal sent by the transmitter. We further assume a single-antenna receiver that can only decode information or harvest energy at any given time due to the practical circuit limitation. As a result, it is important to investigate when the receiver should switch between the two modes of information decoding (ID) and energy harvesting (EH), based on the instantaneous channel and interference conditions. In this paper, we derive the optimal mode switching rule at the receive...

Liu, Liang; Chua, Kee-Chaing

2012-01-01T23:59:59.000Z

429

Experimental Analysis of Heterogeneous Wireless Networks  

E-Print Network (OSTI)

Packet loss and delay in Internet degrade the quality of requested services like VoIP (Voice over IP) or Video Streaming. In novel network scenarios where wired and wireless connections are melted together, a real measure of these parameters is fundamental in a planning process of new services over novel network infrastructures. Nowadays networks are heterogeneous in terms of access network technologies (wired LAN Ethernet 10/100/1000, Wireless LAN - 802.11a, 802.11b, 802.11g -, GPRS, UMTS, GSM, Bluetooth, ...), end-users' devices (workstation, PC desktop, Laptop/Notebook, PDA, Advanced Mobile Phone, ...) and finally operating systems (Unix, Linux, Win 98/NT/2000/XP, Win CE, Linux Familiar, OS Embedded, ...). In this work we provide a heterogeneous network performance characterization with respect to delay and throughput in UDP and TCP environments. In order to determine our results we use an innovative traffic generator named D-ITG (Distributed Internet Traffic Generator). Results presented in this paper can be used as performance references for development of wireless communication applications over multiservice and heterogeneous networks.

Giulio Iannello; Antonio Pescape; Giorgio Ventre; Luca Vollero

2004-01-01T23:59:59.000Z

430

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

431

Characterizing the IEEE 802.11 Traffic: The Wireless Side  

E-Print Network (OSTI)

Many studies on measurement and characterization of wireless LANs have been performed recently. Most of these measurements have been conducted from the wired portion of the network based on wired monitoring or SNMP statistics. In this paper we argue that traffic measurements from a wireless vantage point in the network are more appropriate than wired measurements or SNMP statistics, to expose the wireless medium characteristics and their impact on the traffic patterns. While it is easier to make consistent measurements in the wired part of a network, such measurements can not observe the significant vagaries present in the wireless medium itself. As a consequence constructing an accurate measurement system from a wireless vantage point is important but usually quite difficult due to the noisy wireless channel. In our work we have explored the various issues in implementing such a system to monitor traffic in an IEEE 802.11 based wireless network. We show the effectiveness of the wireless monitoring by quantitatively comparing it with SNMP and measurements at wired vantage points. We also show the analysis of a typical computer science department network traffic using the wireless monitoring technique. Our analysis reveals rich information about the PHY/MAC layers of the IEEE 802.11 protocol such as the typical traffic mix of different frame types, their temporal characteristics, correlation with the user activities and the error characteristics of the wireless medium. Moreover, we identify anomalies in the operation of the IEEE 802.11 MAC protocol. Our results show excessive retransmissions of some management frame types reducing the useful throughput of the wireless network. We also find that some features of the protocol, which were designed to reduce the retransmissi...

Jihwang Yeo; Moustafa Youssef; Ashok Agrawala

2004-01-01T23:59:59.000Z

432

VENTILATION (HVAC) FAILURE (BUILDING WIDE)  

E-Print Network (OSTI)

VENTILATION (HVAC) FAILURE (BUILDING WIDE) A failure or shutdown of the ventilation system will be signaled by cessation of the audible background "rumbling" sound of the building's HVAC system. As building durations. NOTE: Due to unpredictable pressure differentials in and around the labs during an HVAC failure

Strynadka, Natalie

433

Media Advisory: Site-wide Safety Standards | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Media Advisory: Site-wide Safety Standards Media Advisory: Site-wide Safety Standards Media Advisory: Site-wide Safety Standards August 1, 2012 - 12:00pm Addthis Media Contacts Michael Turner, MSA michael_j_turner@rl.gov 509-376-2872 What: Department of Energy to announce two additions to the Hanford Site-wide Safety Standards - a set of 14 areas where Hanford contractors have collaborated to establish one uniform standard to guide safe operations. The latest additions to the Site-wide Safety Standards are Fall Protection and Electrical Safety. DOE Hanford management will explain the significance of the Site-wide Safety Standards, their use and application at the Hanford Site, the benefits to workers and the example Hanford is setting for excellence in safety. Media will then be offered a demonstration of Fall Protection training, along with other training programs at the DOE's Volpentest HAMMER Training Center, operated by Mission Support Alliance.

434

Under the skin: short-range embedded wireless technology  

Science Conference Proceedings (OSTI)

The number of computing, telecommunications and electronic devices in everyday life has been rapidly increasing over the past two decades. Typically, personal computers and related devices are connected with special cables, whilst wireless devices such ... Keywords: Applications, Electronic devices, Short-range wireless, Standards

Stuart J. Barnes

2002-06-01T23:59:59.000Z

435

Time-bounded essential localization for wireless sensor networks  

Science Conference Proceedings (OSTI)

In many practical applications of wireless sensor networks, it is crucial to accomplish the localization of sensors within a given time bound. We find that the traditional definition of relative localization is inappropriate for evaluating its actual ... Keywords: essential localization, relative localization, time-bounded localization, wireless sensor networks

Wei Cheng; Nan Zhang; Xiuzhen Cheng; Min Song; Dechang Chen

2013-04-01T23:59:59.000Z

436

Decision Fusion Rules in Multi-Hop Wireless Sensor  

E-Print Network (OSTI)

Decision Fusion Rules in Multi-Hop Wireless Sensor Networks YING LIN BIAO CHEN, Member, IEEE PRAMOD K. VARSHNEY, Fellow, IEEE Syracuse University The decision fusion problem for a wireless sensor-aware decision fusion rules for resource-constrained WSNs where binary decisions from local sensors may need

Chen, Biao

437

Minimum power allocation for cooperative routing in multihop wireless networks  

Science Conference Proceedings (OSTI)

Due to the limited energy supplies of nodes, in many applications like wireless sensor networks, energy-efficiency is crucial for extending the lifetime of these networks. We study the routing problem for multihop wireless ad hoc networks based on cooperative ...

Behrouz Maham; Are Hjørungnes

2009-03-01T23:59:59.000Z

438

Distributed Coalition Formation Games for Secure Wireless Transmission  

Science Conference Proceedings (OSTI)

Cooperation among wireless nodes has been recently proposed for improving the physical layer (PHY) security of wireless transmission in the presence of multiple eavesdroppers. While existing PHY security literature answered the question "what are the ... Keywords: coalitional games, game theory, physical layer security, secure communication

Walid Saad; Zhu Han; Tamer Ba?ar; Mérouane Debbah; Are Hjørungnes

2011-04-01T23:59:59.000Z

439

Fair Coalitions for Power-Aware Routing in Wireless Networks  

Science Conference Proceedings (OSTI)

Several power-aware routing schemes have been developed for wireless networks under the assumption that nodes are willing to sacrifice their power reserves in the interest of the network as a whole. But, in several applications of practical utility, ... Keywords: Wireless communication, algorithm design and analysis, energy-aware systems and routing.

Ratul K. Guha; Carl A. Gunter; Saswati Sarkar

2007-02-01T23:59:59.000Z

440

A Compact Wireless Charging System for Electric Vehicles  

Science Conference Proceedings (OSTI)

In this paper, a compact high efficiency wireless power transfer system has been designed and developed. The detailed gate drive design, cooling system design, power stage development, and system assembling are presented. The successful tests verified the feasibility of wireless power transfer system to achieve over-all 90% efficiency.

Ning, Puqi [ORNL; Miller, John M [ORNL; Onar, Omer C [ORNL; White, Cliff P [ORNL

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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.


441

A Framework for Testing of Wireless Underwater Robots  

Science Conference Proceedings (OSTI)

Underwater applications of wireless robots are foreseen to hold a market potential. The standardization process will drive the development of the necessary technology so that devices can work cooperatively. Specific testing procedures have to be developed ... Keywords: Conformance, Interoperability, Testing, Underwater, Wireless robot

J. Poncela; M. C. Aguayo-Torres

2013-06-01T23:59:59.000Z

442

Energy Distribution Control in Wireless Sensor Networks Through Range Optimization  

E-Print Network (OSTI)

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

Yanikoglu, Berrin

443

Data aggregation in wireless sensor networks using ant colony algorithm  

Science Conference Proceedings (OSTI)

Data aggregation is important in energy constraint wireless sensor networks which exploits correlated sensing data and aggregates at the intermediate nodes to reduce the number of messages exchanged network. This paper considers the problem of constructing ... Keywords: Ant colony, Data aggregation, Wireless sensor networks

Wen-Hwa Liao; Yucheng Kao; Chien-Ming Fan

2008-11-01T23:59:59.000Z

444

Distributed optimal dynamic base station positioning in wireless sensor networks  

Science Conference Proceedings (OSTI)

Base station (BS) positioning is an effective method for improving the performance of wireless sensor networks (WSNs). A metric-aware optimal BS positioning and relocation mechanism for WSNs is proposed. This technique locates the BS with respect to ... Keywords: Base station placement, Base station relocation, Least-squares optimization, Wireless sensor networks

P. D. Hossein Zadeh; C. Schlegel; M. H. MacGregor

2012-01-01T23:59:59.000Z

445

Wireless charging of lighting gadgets using low Q resonant coupling  

Science Conference Proceedings (OSTI)

Wireless power transfer for lighting gadgets on a table top using low Q resonant coupling is realized. Using distributed capacitances across the transmitter and receiving coils and the inherent resistances of the wires, the coil acts as a tuned LC circuit. ... Keywords: WiTricity, resonant inductive coupling, wireless power transfer

Hema Ramachandran; G. R. Bindu

2012-08-01T23:59:59.000Z

446

Maximizing Battery Life Routing in Wireless Ad Hoc Networks  

E-Print Network (OSTI)

Maximizing Battery Life Routing in Wireless Ad Hoc Networks Weifa Liang Department of Computer Abstract--Most wireless ad hoc networks consist of mobile devices which operate on batteries. Power con, for an ad hoc network consisting of the same type of battery mobile nodes, two approximation algorithms

Liang, Weifa

447

Computationally Simple Battery Management Techniques for Wireless Nodes  

E-Print Network (OSTI)

Computationally Simple Battery Management Techniques for Wireless Nodes Maria Adamou 1 and Saswati In this paper, we investigate di#11;erent battery management policies for a wireless node. The goal is to increase the lifetime of a node by exploiting its battery characteristics. We have presented a framework

Sarkar, Saswati

448

Some comments on wireless sensor networks for natural hazards  

Science Conference Proceedings (OSTI)

Presently, the urgency of creating efficient system to tackle natural hazards such as tsunamis, earthquakes, landslides and floods to cite just a few, have originated that Wireless Sensor Networks (WSNs) play an increasingly important role in the natural ... Keywords: early warning systems, earthquakes, landslides, mobile robotics, tsunamis, wireless sensor networks

M. A. Grado-Caffaro; M. Grado-Caffaro; Mohammad Sadegh Ebrahimi

2011-12-01T23:59:59.000Z

449

Everlast: Long-life, Supercapacitor-operated Wireless Sensor Node  

E-Print Network (OSTI)

Everlast: Long-life, Supercapacitor-operated Wireless Sensor Node Farhan Simjee and Pai H. Chou,phchou}@uci.edu ABSTRACT This paper describes a supercapacitor-operated, solar-powered wire- less sensor node called, Design Keywords Maximum power point tracking, MPPT, supercapacitor, solar power, long life, wireless

Shinozuka, Masanobu

450

Wireless Tomography, Part I: A Novel Approach to Remote Sensing  

E-Print Network (OSTI)

Wireless Tomography, Part I: A Novel Approach to Remote Sensing R. C. Qiu, M. C. Wicks, L. Li, Z. Browning.12@us.af.mil Abstract--Wireless tomography, a novel approach to remote sensing, is proposed--radio frequency tomography, remote sensing, cognitive radar, cognitive radio. I. INTRODUCTION The ever increasing

Qiu, Robert Caiming

451

Energy-Aware Routing in Wireless Ad-hoc Networks  

E-Print Network (OSTI)

Energy-Aware Routing in Wireless Ad-hoc Networks Panagiotis C. Kokkinos Christos A. Papageorgiou Emmanouel A. Varvarigos Abstract In this work we study energy efficient routing strate- gies for wireless ad-hoc networks. In this kind of net- works, energy is a scarce resource and its conservation

Varvarigo, Emmanouel "Manos"

452

Automatic mobility status estimation in wireless self-organised networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks and ubiquitous computing are rapidly increasing in popularity and diversity. For many applications of these systems the mobility status of devices forms part of the operating context on which self-organisation is based. This ... Keywords: Lévy Flights, Mobility models and metrics, Reinforcement learning, Self-detection of mobility, Wireless sensor networks

Richard Anthony; Mona Ghassemian

2011-03-01T23:59:59.000Z

453

Dynamic data compression in multi-hop wireless networks  

Science Conference Proceedings (OSTI)

Data compression can save energy and increase network capacity in wireless sensor networks. However, the decision of whether and when to compress data can depend upon platform hardware, topology, wireless channel conditions, and application data rates. ... Keywords: energy efficiency, stochatic network optimization

Abhishek B. Sharma; Leana Golubchik; Ramesh Govindan; Michael J. Neely

2009-06-01T23:59:59.000Z

454

Power management and power control in wireless networks  

E-Print Network (OSTI)

With the proliferation of portable computing platforms and small wireless devices, wireless networks have received more and more attention as a means for providing data communications among devices regardless of their physical locations. However, due to the slow advancement in battery technology, battery power continues to be a constrained resource in wireless networks and thus energy conservation remains to be an important issue. In this book chapter, we provide a taxonomy of power management and power control algorithms and protocols for wireless networks. We start with a description of energy consumption characteristics of wireless devices, and identify the power consumed in the wireless transmitters essentially consists of two parts: power consumed by the radio electronic and power consumed in the RF output. To save power, one can either turn off the radio electronic and put wireless devices into the power saving mode at appropriate times, or adjust the RF output power (and hence the wireless transmission range) subject to maintaining network connectivity and bi-directionality. The former techniques are termed as power management, while the latter power

Rong Zheng; Jennifer C. Hou; Ning Li

2004-01-01T23:59:59.000Z

455

Review: From wireless sensor networks towards cyber physical systems  

Science Conference Proceedings (OSTI)

In the past two decades, a lot of research activities have been dedicated to the fields of mobile ad hoc network (MANET) and wireless sensor networks (WSN). More recently, the cyber physical system (CPS) has emerged as a promising direction to enrich ... Keywords: Cyber physical system, Internet technology, Mobile ad hoc network, Pervasive computing, Sensing and actuation, Wireless sensor network

Fang-Jing Wu; Yu-Fen Kao; Yu-Chee Tseng

2011-08-01T23:59:59.000Z

456

Solar-aware Routing in Wireless Sensor Networks  

E-Print Network (OSTI)

Solar-aware Routing in Wireless Sensor Networks Thiemo Voigt, Hartmut Ritter and Jochen Schiller energy sources such as solar power may provide unlimited energy resources to a changing subset these nodes is appealing. In this paper, we present solar-aware routing, a rout- ing protocol for wireless

457

A middleware-based approach for heterogeneous wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSN) are networked embedded systems that use small size devices with some processing and short-range radio communication capabilities for monitoring and controlling systems and environments. However, languages and IDE (Integrated ... Keywords: heterogeneous networks, middleware, wireless sensor networks

F. Graziosi; L. Pomante; D. Pacifico

2008-07-01T23:59:59.000Z

458

Location privacy and resilience in wireless sensor networks querying  

Science Conference Proceedings (OSTI)

Due to the wireless nature of communication in sensor networks, the communication patterns between sensors could be leaked regardless of the adoption of encryption mechanisms-those would just protect the message content. However, communication patterns ... Keywords: Location privacy, Probabilistic algorithm, Resiliency, Security, Wireless sensor networks

Roberto Di Pietro; Alexandre Viejo

2011-03-01T23:59:59.000Z

459

Wireless sensor interface and gesture-follower for music pedagogy  

Science Conference Proceedings (OSTI)

We present in this paper a complete gestural interface built to support music pedagogy. The development of this prototype concerned both hardware and software components: a small wireless sensor interface including accelerometers and gyroscopes, and ... Keywords: gesture recognition, gesture-follower, music pedagogy, technology-enhanced learning, wireless interface

Frederic Bevilacqua; Fabrice Guédy; Norbert Schnell; Emmanuel Fléty; Nicolas Leroy

2007-06-01T23:59:59.000Z

460

Wireless sensor networks: Enabling technology for ambient intelligence  

Science Conference Proceedings (OSTI)

Wireless sensor networks are one of the most rapidly evolving research and development fields for microelectronics. Their applications are countless, and the market potentials are huge. However, many technical hurdles have to be overcome to achieve a ... Keywords: Bio-sensors, Embedded systems, Energy efficiency, Wireless sensor networks

L. Benini; E. Farella; C. Guiducci

2006-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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.


461

Optimal placement of mesh points in wireless mesh networks  

Science Conference Proceedings (OSTI)

A strategic placement of mesh points (MPs) in a Wireless Mesh Network (WMN) is essential to maximize the throughput of the network. In this paper, we address the problem of MPs placement for throughput optimization in WMN with consideration of routing ... Keywords: gateway placement, throughput optimization, wireless mesh network

Suk Yu Hui; Kai Hau Yeung; Kin Yeung Wong

2008-05-01T23:59:59.000Z

462

Information fusion for wireless sensor networks: Methods, models, and classifications  

Science Conference Proceedings (OSTI)

Wireless sensor networks produce a large amount of data that needs to be processed, delivered, and assessed according to the application objectives. The way these data are manipulated by the sensor nodes is a fundamental issue. Information fusion arises ... Keywords: Information fusion, architectures and models, data aggregation, data fusion, wireless sensor networks

Eduardo F. Nakamura; Antonio A. F. Loureiro; Alejandro C. Frery

2007-09-01T23:59:59.000Z

463

Handover Performance of HVAC Duct Based Indoor Wireless Networks  

E-Print Network (OSTI)

Handover Performance of HVAC Duct Based Indoor Wireless Networks A. E. Xhafa, P. Sonthikorn, and O in indoor wireless net- works (IWN) that use heating, ventilation, and air conditioning (HVAC) ducts.e., new call blocking and handover dropping probabilities, of an IWN that uses HVAC ducts are up to 6

Stancil, Daniel D.

464

Energy-efficient broadcasting in all-wireless networks  

Science Conference Proceedings (OSTI)

In all-wireless networks, minimizing energy consumption is crucial as in most cases the nodes are battery-operated. We focus on the problem of power-optimal broadcast, for which it is well known that the broadcast nature of radio transmissions can be ... Keywords: approximation algorithms, complexity theory, energy efficiency, minimum-energy networks, wireless ad hoc networks

Mario ?agalj; Jean-Pierre Hubaux; Christian C. Enz

2005-01-01T23:59:59.000Z

465

A survey on clustering algorithms for wireless sensor networks  

Science Conference Proceedings (OSTI)

The past few years have witnessed increased interest in the potential use of wireless sensor networks (WSNs) in applications such as disaster management, combat field reconnaissance, border protection and security surveillance. Sensors in these applications ... Keywords: Clustering algorithms, Energy aware design, Network architecture, Scalability, Wireless sensor networks

Ameer Ahmed Abbasi; Mohamed Younis

2007-10-01T23:59:59.000Z

466

Geographic convergecast using mobile sink in wireless sensor networks  

Science Conference Proceedings (OSTI)

This paper presents a novel convergecast algorithm called, Virtual Circle Combined Straight Routing (VCCSR), which collects data in a wireless sensor network (WSN) using a mobile sink. Tree-based routing offers the shortest routes to deliver data, and ... Keywords: Clustering, Convergecast, Data collection, Mobile sink, Wireless sensor networks

Tzung-Shi Chen; Hua-Wen Tsai; Yu-Hsin Chang; Tzung-Cheng Chen

2013-02-01T23:59:59.000Z

467

A study of reconnecting the partitioned wireless sensor networks  

Science Conference Proceedings (OSTI)

Most wireless sensor networks (WSN) researches assume that the network is connected and there is always a path connected by wireless links between a source and a destination. In this paper, we argue that network partitioning is not an uncommon phenomenon ...

Qing Ye; Liang Cheng

2005-04-01T23:59:59.000Z

468

Radio link quality estimation in wireless sensor networks: A survey  

Science Conference Proceedings (OSTI)

Radio link quality estimation in Wireless Sensor Networks (WSNs) has a fundamental impact on the network performance and also affects the design of higher-layer protocols. Therefore, for about a decade, it has been attracting a vast array of research ... Keywords: Link quality estimation, link characteristics, low-power links, wireless sensor networks

Nouha Baccour; Anis Koubâa; Luca Mottola; Marco Antonio Zúñiga; Habib Youssef; Carlo Alberto Boano; Mário Alves

2012-09-01T23:59:59.000Z

469

Neighbor discovery in wireless networks and the coupon collector's problem  

Science Conference Proceedings (OSTI)

Neighbor discovery is one of the first steps in the initialization of a wireless ad hoc network. In this paper, we design and analyze practical algorithms for neighbor discovery in wireless networks. We first consider an ALOHA-like neighbor discovery ... Keywords: ad hoc networks, initialization, neighbor discovery, randomized algorithms, sensor networks

Sudarshan Vasudevan; Donald Towsley; Dennis Goeckel; Ramin Khalili

2009-09-01T23:59:59.000Z

470

Self-destruction procedure for mesh wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSN) are rapidly expanding their attractiveness in both military and civilian applications, imposing the need for effective security strategies/mechanisms. Since sensor networks in many circumstances operate with sensitive data ... Keywords: mesh networks, network lifecycle, security, self-destruction, wireless sensor networks

Madalin Plastoi; Daniel-Ioan Curiac; Iosif Gut; Constantin Volosencu

2009-09-01T23:59:59.000Z

471

Neighbor Selection Game in Wireless Ad Hoc Networks  

Science Conference Proceedings (OSTI)

In wireless ad hoc networks, there is no infrastructure to enforce cooperation between nodes. As a result, nodes may act selfishly when running network protocols to conserve their energy resources as much as possible. In this paper, we consider the "neighbor ... Keywords: Energy efficiency, Game theory, Neighbor selection, Selfish nodes, Wireless ad hoc networks

Sajjad Zarifzadeh; Nasser Yazdani

2013-05-01T23:59:59.000Z

472

Modeling environmental effects on directionality in wireless networks  

Science Conference Proceedings (OSTI)

One method for improving wireless network throughput involves using directional antennas to increase signal gain and/or decrease interference. The physical layer models used in current networking simulators only minimally address the interaction of directional ... Keywords: Antenna, Directional, Environment, Model, Networking, Wireless

Eric Anderson; Caleb Phillips; Douglas Sicker; Dirk Grunwald

2011-06-01T23:59:59.000Z

473

Ensemble based sensing anomaly detection in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are often used to monitor and measure physical characteristics from remote and sometimes hostile environments. In these circumstances the sensing data accuracy is a crucial attribute for the way these applications complete their ... Keywords: Binary classifier, Data accuracy, Ensemble based systems, Sensors anomalies, Wireless sensor networks

Daniel-Ioan Curiac; Constantin Volosencu

2012-08-01T23:59:59.000Z

474

Optimized relay node placement for connecting disjoint wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) often operate in a harsh environment such as battlefield and may suffer simultaneous failure of multiple sensors that cause the network to become partitioned into disjoint segments. In order to prevent the application ... Keywords: Connectivity restoration, Network partitioning, Relay node placement, Wireless sensor networks

Sookyoung Lee; Mohamed Younis

2012-08-01T23:59:59.000Z

475

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

476

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

477

Health monitoring of civil infrastructures using wireless sensor networks  

Science Conference Proceedings (OSTI)

A Wireless Sensor Network (WSN) for Structural Health Monitoring (SHM) is designed, implemented, deployed and tested on the 4200ft long main span and the south tower of the Golden Gate Bridge (GGB). Ambient structural vibrations are reliably measured ... Keywords: deployment, large-scale, structural health monitoring, wireless sensor networks

Sukun Kim; Shamim Pakzad; David Culler; James Demmel; Gregory Fenves; Steven Glaser; Martin Turon

2007-04-01T23:59:59.000Z

478

Secure position verification for wireless sensor networks in noisy channels  

Science Conference Proceedings (OSTI)

Position verification in wireless sensor networks (WSNs) is quite tricky in presence of attackers (malicious sensor nodes), who try to break the verification protocol by reporting their incorrect positions (locations) during the verification stage. In ... Keywords: 3? limit, distance estimation, distributed protocol, location verification, quantiles, wireless networks

Partha Sarathi Mandal; Anil K. Ghosh

2011-07-01T23:59:59.000Z

479

Energy efficient searching in delay-tolerant wireless sensor networks  

Science Conference Proceedings (OSTI)

In this paper, we consider the problem of information discovery in densely deployed and delay-tolerant Wireless Sensor Network (WSN), where the initiator of search is unaware of the location of target information. We propose Increasing Ray Search (IRS), ... Keywords: energy efficiency, query, search, wireless sensor networks

Kiran Rachuri; A. Antony Franklin; C. Siva Ram Murthy

2008-05-01T23:59:59.000Z

480

Localized power-aware routing in linear wireless sensor networks  

Science Conference Proceedings (OSTI)

Energy-efficency is a key concern when designing protocols for wireless sensor networks (WSN). This is of particular importance in commercial applications where demonstrable return on investment is a crucial factor. One such commercial application that ... Keywords: energy efficiency, linear topology, localized protocol, routing, wireless sensor network

Marco Zimmerling; Waltenegus Dargie; Johnathan M. Reason

2008-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "wide area wireless" 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.


481

Energy conservation in wireless sensor networks: A survey  

Science Conference Proceedings (OSTI)

In the last years, wireless sensor networks (WSNs) have gained increasing attention from both the research community and actual users. As sensor nodes are generally battery-powered devices, the critical aspects to face concern how to reduce the energy ... Keywords: Energy efficiency, Power management, Survey, Wireless sensor networks

Giuseppe Anastasi; Marco Conti; Mario Di Francesco; Andrea Passarella

2009-05-01T23:59:59.000Z

482

A Delaunay Triangulation based method for wireless sensor network deployment  

Science Conference Proceedings (OSTI)

To obtain a satisfied performance of wireless sensor network, an adaptable sensor deployment method for various applications is essential. In this paper, we propose a centralized and deterministic sensor deployment method, DT-Score (Delaunay Triangulation-Score), ... Keywords: Delaunay Triangulation, Obstacles, Sensor coverage, Sensor deployment, Wireless sensor network

Chun-Hsien Wu; Kuo-Chuan Lee; Yeh-Ching Chung

2007-10-01T23:59:59.000Z

483

Resource allocation in OFDMA wireless communications systems supporting multimedia services  

Science Conference Proceedings (OSTI)

We design a resource allocation algorithm for down-link of orthogonal frequency division multiple access (OFDMA) systems supporting real-time (RT) and best-effort (BE) services simultaneously over a time-varying wireless channel. The proposed algorithm ... Keywords: multimedia communications, orthogonal frequency division multiple access (OFDMA), quality of service (QoS), radio resource allocation, wireless network

Kae Won Choi; Wha Sook Jeon; Dong Geun Jeong

2009-06-01T23:59:59.000Z

484

Wireless mesh network security: A traffic engineering management approach  

Science Conference Proceedings (OSTI)

The wireless mesh network (WMN) is an emerging multihop, heterogeneous, easily scalable and low cost network. The architecture of the WMN is a connectionless-oriented, mobile and dynamic traffic of routed packets. The mesh infrastructure environment ... Keywords: IPSec, MPLS, Security, Traffic engineering, VPN, Wireless mesh networks

Okechukwu E. Muogilim; Kok-Keong Loo; Richard Comley

2011-03-01T23:59:59.000Z

485

Research on IPv6 address configuration for wireless sensor networks  

Science Conference Proceedings (OSTI)

The paper proposes an IPv6 address configuration scheme for wireless sensor networks. In the scheme, one wireless sensor network is divided into multiple clusters and the scheme creates the IPv6 address formats for the cluster heads and the cluster members ...

Xiaonan Wang; Demin Gao

2010-11-01T23:59:59.000Z

486

Optimal Routing and Scheduling in Multihop Wireless Renewable Energy Networks  

E-Print Network (OSTI)

Optimal Routing and Scheduling in Multihop Wireless Renewable Energy Networks MHR. Khouzani-constrained wireless ad-hoc networks where nodes are powered by renewable energy sources. We take into account the fact that renewable energy harvesting processes are unpredictable and stochastic in nature ­ typically depending

Sarkar, Saswati

487

A Co-optimization Routing Algorithm in Wireless Sensor Network  

Science Conference Proceedings (OSTI)

The MACORA is presented to solve the collision between mobile agent and multicast suppression in channel competitive process. With two-layer graph model, the channel converter problem in the dual-channel wireless sensor networks can be simplified into ... Keywords: Co-optimization, Dual-channel, Mobile agent, Packet transmission, The optimal route Restoring, Wireless sensor networks

Ran Jin, Chunhai Kou, Ruijuan Liu, Yefeng Li

2013-06-01T23:59:59.000Z

488

Networked computing in wireless sensor networks for structural health monitoring  

Science Conference Proceedings (OSTI)

This paper studies the problem of distributed computation over a network of wireless sensors. While this problem applies to many emerging applications, to keep our discussion concrete, we will focus on sensor networks used for structural health monitoring. ... Keywords: clustering, degree-constrained data collection tree, networked computing, singular value decomposition (SVD), structural health monitoring (SHM), wireless sensor networks (WSNs)

Apoorva Jindal; Mingyan Liu

2012-08-01T23:59:59.000Z

489

Secure wireless communication platform for EV-to-Grid research  

Science Conference Proceedings (OSTI)

"Vehicle to Grid" power or V2G will be a new green energy scheme that allows electricity to flow from Electric Vehicles (EVs) to power lines. The objective of this paper is to design and develop a secure wireless communication platform for V2G research, ... Keywords: authentication protocol, electric vehicle, power grid, secure wireless communication

Huaqun Guo; Fan Yu; W. C. Wong; Vivy Suhendra; Y. D. Wu

2010-06-01T23:59:59.000Z

490

A lightweight approach to mobile multicasting in Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks (WSN) are envisioned to have significant impacts on many applications. In scenarios such as first responder systems and administrative applications, data sinks are frequently being mobile. In this research, we study one-to-many ... Keywords: WSN, ad hoc computing, ad hoc networks, mobile multicasting, pervasive computing, sensor networks, simulation, target tracking, ubiquitous computing, wireless networks

Qing Ye; Liang Cheng

2006-12-01T23:59:59.000Z

491

TeleScribe: a scalable, resumable wireless reprogramming approach  

Science Conference Proceedings (OSTI)

TeleScribe is a software mechanism for efficiently reprogramming embedded systems such as wireless sensor nodes over a shared communication link. One distinguishing feature is its ability to resume update on any node after power failure, link disconnection, ... Keywords: resumable remote reprogramming, tdma, wireless sensor networks

Min-Hua Chen; Pai H. Chou

2010-10-01T23:59:59.000Z

492

Resource-aware speculative prefetching in wireless networks  

Science Conference Proceedings (OSTI)

Mobile users connected to wireless networks expect performance comparable to those on wired networks for interactive multimedia applications. Satisfying Quality of Service (QoS) requirements for such applications in wireless networks is a challenging ... Keywords: bandwidth, caching, compound request, network load, speculative prefetching

N. J. Tuah; M. Kumar; S. Venkatesh

2003-01-01T23:59:59.000Z

493

A channel selection method to increase wireless sensor battery life  

Science Conference Proceedings (OSTI)

In most of wireless sensor networks a single externally-powered coordinator collects data from several battery-powered nodes using a simple star topology. This paper presents an innovative approach, based on an adaptive channel selection method, to reduce ... Keywords: RF power measurement, RSSI, low-power system, power aware protocols, wireless sensor network

A. Flammini; E. Sisinni; D. Marioli; A. Taroni

2006-04-01T23:59:59.000Z

494

Distributed scheduling schemes for wireless mesh networks: A survey  

Science Conference Proceedings (OSTI)

An efficient scheduling scheme is a crucial part of Wireless Mesh Networks (WMNs)—an emerging communication infrastructure solution for autonomy, scalability, higher throughput, lower delay metrics, energy efficiency, and other service-level guarantees. ... Keywords: Wireless mesh networks, ad hoc networks, cyclic access, distributed scheduling schemes, pseudo-random access, random access

Kanthaiah Sivapragasam Vijayalayan, Aaron Harwood, Shanika Karunasekera

2013-10-01T23:59:59.000Z

495

Active sensing platform for wireless structural health monitoring  

Science Conference Proceedings (OSTI)

This paper presents SHiMmer, a wireless platform for sensing and actuation that combines localized processing with energy harvesting to provide long-lived structural health monitoring. The life-cycle of the node is significantly extended by the use of ... Keywords: actuation, energy harvesting, low power, sensing, wireless

D. Musiani; K. Lin; T. Simunic Rosing

2007-04-01T23:59:59.000Z

496

Wide Bandgap Extrinsic Photoconductive Switches  

SciTech Connect

Photoconductive semiconductor switches (PCSS) have been investigated since the late 1970s. Some devices have been developed that withstand tens of kilovolts and others that switch hundreds of amperes. However, no single device has been developed that can reliably withstand both high voltage and switch high current. Yet, photoconductive switches still hold the promise of reliable high voltage and high current operation with subnanosecond risetimes. Particularly since good quality, bulk, single crystal, wide bandgap semiconductor materials have recently become available. In this chapter we will review the basic operation of PCSS devices, status of PCSS devices and properties of the wide bandgap semiconductors 4H-SiC, 6H-SiC and 2H-GaN.

Sullivan, J S

2012-01-17T23:59:59.000Z

497

Wireless Sensor Node Placement Using Hybrid Genetic Programming and Genetic Algorithms  

Science Conference Proceedings (OSTI)

The ease of use and re-configuration in a wireless network has played a key role in their widespread growth. The node deployment problem deals with an optimal placement strategy of the wireless nodes. This paper models a wireless sensor network, consisting ... Keywords: Genetic Algorithms, Genetic Programming, Hierarchical Genetic Algorithms, Node Deployment, Wireless Sensor Networks Optimization

Arpit Tripathi; Pulkit Gupta; Aditya Trivedi; Rahul Kala

2011-04-01T23:59:59.000Z

498

How Evolving Network Access and Network Management Technologies are Redefining the Competitive Wireless Markets  

Science Conference Proceedings (OSTI)

This paper examines some of the key problems users encounter when accessing current generation wireless networks. Using a case study of a hypothetical user, the authors explore the emerging services and the new broadband wireless network technologies ... Keywords: Autonomic Communications, Broadband Wireless Access Technologies, Cognitive Wireless Networks, Short and Long-Term Service Contracts, Two-Sided Markets, User-Centric Services

Fernando Beltrán; Jairo A. Gutiérrez; José Luis Melús

2011-07-01T23:59:59.000Z

499

Harmonization of Wireless Dimming Lighting Control | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Harmonization of Wireless Dimming Lighting Harmonization of Wireless Dimming Lighting Control Harmonization of Wireless Dimming Lighting Control The U.S. Department of Energy (DOE) is currently conducting research into the harmonization of ZigBee, BACnet-or building automation and control network-and DALI-or digital addressable lighting interface-systems in wireless dimming lighting controls. Four proposed modules will enable "plug-and-play" capabilities for all DALI-compatible controls and BACnet-compatible systems. Project Description This project seeks to develop "plug-and-play" capabilities for lighting as an integrated component of a whole-building control system. Verified Energy, LLC, attempts to demonstrate the benefits of implementing wireless control in dimming applications using plug-and-play principles.

500

ADVANCED WIRELESS CHARGING SYSTEM FOR PORTABLE ELECTRIC DEVICES  

E-Print Network (OSTI)

This paper presents a wireless charging system for portable electric devices. The important impacts of wireless charging systems on the global environment are first examined, and the two basic methods for wireless charging are then explained. The feasibility of applying each method to the wireless charging system is also analyzed. In order to achieve a high efficiency and more precise control for the wireless power transfer, the technology of a contactless charging board is used in this research. Because the experiments operated base on an induction cooker, the basic structure of the induction cooker are explained. Then the strategy of controling the output power is given. Finally, comprehensive experiments with efficiency tests, effective distance tests, and how the location of the coil would affect those important factors are given. The result shows that the method of contactless charging board is reliable for portable electric devices to achieve a relatively high charging efficiency and an acceptable charging distance.

Liu, Jianyang

2012-05-01T23:59:59.000Z