Sample records for unlicensed wireless fiber

  1. IEEE Wireless Communications and Networking Conference (WCNC), Sept. 2000 A Novel Co-existence Algorithm for Unlicensed Fixed Power Devices

    E-Print Network [OSTI]

    Peha, Jon M.

    ]. The Federal Communications Commission (FCC) has of late increased unlicensed allocations, creating1 IEEE Wireless Communications and Networking Conference (WCNC), Sept. 2000 A Novel Co the Unlicensed Personal Communication Services (UPCS) band [2], the Unlicensed National Information

  2. Accepted for publication in Proceedings of IEEE International Conference on Communications, June 2001 A Novel Co-existence Algorithm for Unlicensed Variable Power Devices

    E-Print Network [OSTI]

    Peha, Jon M.

    ], the Federal Communications Commission (FCC) has created several unlicensed bands, such as the IndustryAccepted for publication in Proceedings of IEEE International Conference on Communications, June, Science and Medicine (ISM) bands, the Unlicensed Personal Communication Services (UPCS) band [2

  3. Design and Analysis of Opportunistic MAC Protocols for Cognitive Radio Wireless Networks 

    E-Print Network [OSTI]

    Su, Hang

    2012-02-14T23:59:59.000Z

    that is under-utilized. This motivates the concept of cognitive radio wireless networks that allow the unlicensed secondary-users (SUs) to dynamically use the vacant radio spectrum which is not being used by the licensed primary-users (PUs...

  4. Intrusion detection and monitoring for wireless networks.

    SciTech Connect (OSTI)

    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

    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.

  5. Applying an intelligent and automated emissions measurement system to characterize the RF environment for supporting wireless technologies

    SciTech Connect (OSTI)

    Keebler, P. F.; Phipps, K. O. [EPRI Solutions, 942 Corridor Park Blvd, Knoxville, TN 37932 (United States)

    2006-07-01T23:59:59.000Z

    The use of wireless technologies in commercial and industrial facilities has grown significantly in the past several years. New applications of wireless technologies with increasing frequency and varying radiated power are being developed everyday. Wireless application specialists and end users have already identified several sources of electromagnetic interference (EMI) in these facilities. Interference has been reported between wireless devices and between these devices and other types of electronic equipment either using frequencies in the unlicensed wireless spectrum or equipment that may generate undesired man-made noise in this spectrum. Facilities that are not using the wireless band should verify the spectral quality of that band and the electromagnetic compatibility (EMC) integrity of safety-related power and signal cables before installing wireless technologies. With the introduction of new wireless devices in the same electromagnetic space where analog and digital I and C systems and cables must co-exist, the ability of facility managers to manage their spectra will dictate the degree of interference between wireless devices and other electronic equipment. Because of the unknowns associated with interference with analog and digital I and C systems in the wireless band, nuclear power plants have been slow to introduce wireless technologies in plant areas. With the application of newly developed advanced radiated emissions measurement systems that can record, process, and analyze radiated and conducted emissions in a cost-effective manner, facility managers can more reliably characterize potential locations for wireless technologies, including potential coupling effects with safety-related power and signal cables, with increased confidence that the risks associated with creating an interference can be significantly reduced. This paper will present an effective philosophy already being used in other mission-critical applications for managing EMC, an overview of wireless emissions sources, the need for EMC characterization of power and signal cables with exposure to wireless devices, and an intelligent and automated emissions measurement system. Such a system can be used in nuclear power plants to determine the spectral quality of the wireless band, the EMC characterization of power and signal cables, and if wireless technologies can be collocated in plants while reducing the risk of interference with I and C systems. (authors)

  6. Mobility in Wireless Sensor Networks

    E-Print Network [OSTI]

    Mehta, Ankur Mukesh

    2012-01-01T23:59:59.000Z

    Channel-Specific Wireless Sensor Network Path Data”. In:Average Power in Wireless Sensor Networks through Data Ratedesign space of wireless sensor networks”. In: IEEE Wireless

  7. Energy Harvesting Wireless Communications

    E-Print Network [OSTI]

    Ulukus, Sennur

    perspective what should we care about for energy efficient design of cellular/conventional wireless networks

  8. Control over Wireless NetworksControl over Wireless Networks Karl Henrik Johansson

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Control over Wireless NetworksControl over Wireless Networks Karl Henrik Johansson School wireless networksOutline: Control over wireless networks · Motivating examples · Benefits and barriersMotivation for control over wireless networkscontrol over wireless networks · Wireless industrial automation

  9. Wireless Urban Sensing Systems

    E-Print Network [OSTI]

    2006-01-01T23:59:59.000Z

    enabled by personal wireless sensing devices introduces newpublic or personal servers, but also on mobile devices. For

  10. Carbon Fiber

    ScienceCinema (OSTI)

    McGetrick, Lee

    2014-07-23T23:59:59.000Z

    Lee McGetrick leads ORNL's effort to produce light, durable carbon fiber at lower cost -- a key to improvements in manufacturing that will produce more fuel-efficient vehicles and other advances.

  11. Carbon Fiber

    SciTech Connect (OSTI)

    McGetrick, Lee

    2014-04-17T23:59:59.000Z

    Lee McGetrick leads ORNL's effort to produce light, durable carbon fiber at lower cost -- a key to improvements in manufacturing that will produce more fuel-efficient vehicles and other advances.

  12. Chapters 6 & 8 Wireless Networks

    E-Print Network [OSTI]

    Lu, Enyue "Annie"

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

  13. Survivability Considerations in Wireless Networks

    E-Print Network [OSTI]

    Ning, Jianxia

    2012-01-01T23:59:59.000Z

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

  14. Specific Effects of Fiber Size and Fiber Swelling on Biomass...

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

    Effects of Fiber Size and Fiber Swelling on Biomass Substrate Surface Area and Enzymatic Digestibility. Specific Effects of Fiber Size and Fiber Swelling on Biomass Substrate...

  15. Wireless Network Intrinsic Secrecy

    E-Print Network [OSTI]

    Rabbachin, Alberto

    Wireless secrecy is essential for communication confidentiality, health privacy, public safety, information superiority, and economic advantage in the modern information society. Contemporary security systems are based on ...

  16. Wireless Sensor Networks for Home Health Care

    E-Print Network [OSTI]

    2007-01-01T23:59:59.000Z

    Wireless Sensor Networks for Home Health Care Chris R.Cooperation between wireless sensor networks and existingapplications of wireless sensor networks. In this paper we

  17. Special Issue on “Wireless Sensor Networks”

    E-Print Network [OSTI]

    Yao, Kung; Zhang, Qian; Zhao, Qing

    2009-01-01T23:59:59.000Z

    Special Issue on “Wireless Sensor Networks” Kung Yao & Qianand tracking, etc. Wireless sensor networks utilize theaspects of wireless sensor networks. The first paper, “

  18. Data Transport Control in Wireless Sensor Networks

    E-Print Network [OSTI]

    Zhang, Hongwei; Naik, Vinayak S

    2008-01-01T23:59:59.000Z

    Congestion in Wireless Sensor Networks. ACM SenSys SandeepJohn Anderson (2002). Wireless Sensor Networks for HabitatWorkshop on Wireless Sensor Networks and Applications Miklos

  19. Polyethylene fiber drawing optimization

    E-Print Network [OSTI]

    Chiloyan, Vazrik

    2011-01-01T23:59:59.000Z

    Polymer fiber drawing creates fibers with enhanced thermal conductivity and strength compared to bulk polymer because drawing aligns the molecular chains. I optimize the polymer fiber drawing method in order to achieve ...

  20. Multimaterial acoustic fibers

    E-Print Network [OSTI]

    Chocat, Noémie

    2012-01-01T23:59:59.000Z

    The emergence of multimaterial fibers that combine a multiplicity of solid materials with disparate electrical, optical, and mechanical properties into a single fiber presents new opportunities for extending fiber applications ...

  1. Fiber Lasers

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasReleaseSpeechesHall ATours, Programs and EventsFiber Lasers NIF

  2. Wireless sensor networks for measuring traffic

    E-Print Network [OSTI]

    Varaiya, Pravin

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

  3. Carbon Fiber Technology Facility

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

    The Carbon Fiber Technology Facility is relevant in proving the scale- up of low-cost carbon fiber precursor materials and advanced manufacturing technologies * Significant...

  4. Adaptive Scheduling in Ad Hoc and Cellular Wireless Networks

    E-Print Network [OSTI]

    Tan, Choo Chin

    2013-01-01T23:59:59.000Z

    organization wireless networks and wireless mobile ad-hocfor heterogeneous wireless network”, in Proc. of IEEER. Khalaf, “Ad hoc wireless networks with mobile backbones,”

  5. Deployment Algorithm for Femtocells in Multi-tiered Wireless Cellular Network

    E-Print Network [OSTI]

    Bahk, Saewoong

    by the existing macro-cellular network. To satisfy the interests of WSP and customers we propose an automated tool fibers or wireless last-mile technologies [1]. The short distance between a user and a femto base station [3] is about antenna placement problem which includes location and configuration of network

  6. Network coded wireless architecture

    E-Print Network [OSTI]

    Katti, Sachin Rajsekhar

    2008-01-01T23:59:59.000Z

    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 ...

  7. Video transmission over wireless networks 

    E-Print Network [OSTI]

    Zhao, Shengjie

    2005-08-29T23:59:59.000Z

    Compressed video bitstream transmissions over wireless networks are addressed in this work. We first consider error control and power allocation for transmitting wireless video over CDMA networks in conjunction with multiuser detection. We map a...

  8. Energy efficiency in wireless networks

    E-Print Network [OSTI]

    Jung, Eun-Sun

    2005-11-01T23:59:59.000Z

    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...

  9. Video transmission over wireless networks

    E-Print Network [OSTI]

    Zhao, Shengjie

    2005-08-29T23:59:59.000Z

    Compressed video bitstream transmissions over wireless networks are addressed in this work. We first consider error control and power allocation for transmitting wireless video over CDMA networks in conjunction with multiuser detection. We map a...

  10. Energy efficiency in wireless networks 

    E-Print Network [OSTI]

    Jung, Eun-Sun

    2005-11-01T23:59:59.000Z

    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 ...

  11. Threat Insight Quarterly Wireless Technology

    E-Print Network [OSTI]

    X-Force ® Threat Insight Quarterly Wireless Technology April 2006 #12;X - F O R C E T H R E A T I N the Wireless Threat ..................................................3 Wireless Threats-Force Catastrophic Risk Index...................................... 13 Future X-Force Threat Insight Quarterly Topics

  12. Reconfigurable Wireless Interface for Networking Sensors (ReWINS)

    E-Print Network [OSTI]

    California at Los Angeles, University of

    , Rajit Gadh {harish, bsp, gadh}@wireless.ucla.edu Wireless Internet for the Mobile Enterprise Consortium

  13. Optimal Deployment of Large Wireless Sensor Networks

    E-Print Network [OSTI]

    Toumpis, Stavros

    1 Optimal Deployment of Large Wireless Sensor Networks S. Toumpis, Member, IEEE, and Leandros, Sensor networks. I. INTRODUCTION A. Wireless Sensor Networks Wireless sensor networks are comprised of sensors that are equipped with wireless transceivers and so are able to form a wireless network [3

  14. Omnidirectional fiber optic tiltmeter

    DOE Patents [OSTI]

    Benjamin, B.C.; Miller, H.M.

    1983-06-30T23:59:59.000Z

    A tiltmeter is provided which is useful in detecting very small movements such as earth tides. The device comprises a single optical fiber, and an associated weight affixed thereto, suspended from a support to form a pendulum. A light source, e.g., a light emitting diode, mounted on the support transmits light through the optical fiber to a group of further optical fibers located adjacent to but spaced from the free end of the single optical fiber so that displacement of the single optical fiber with respect to the group will result in a change in the amount of light received by the individual optical fibers of the group. Photodetectors individually connectd to the fibers produce corresponding electrical outputs which are differentially compared and processed to produce a resultant continuous analog output representative of the amount and direction of displacement of the single optical fiber.

  15. Multimaterial fiber electronics

    E-Print Network [OSTI]

    Lestoquoy, Guillaume

    2014-01-01T23:59:59.000Z

    As the number of materials that are thermally-drawable into fibers is rapidly expending, numerous new multimaterial fiber architectures can be envisioned and fabricated. High-melting temperature metals, compound materials, ...

  16. Fiber optic coupled optical sensor

    DOE Patents [OSTI]

    Fleming, Kevin J. (Albuquerque, NM)

    2001-01-01T23:59:59.000Z

    A displacement sensor includes a first optical fiber for radiating light to a target, and a second optical fiber for receiving light from the target. The end of the first fiber is adjacent and not axially aligned with the second fiber end. A lens focuses light from the first fiber onto the target and light from the target onto the second fiber.

  17. Helical Fiber Amplifier

    DOE Patents [OSTI]

    Koplow, Jeffrey P. (Washington, DC); Kliner, Dahy (San Ramon, CA); Goldberg, Lew (Fairfax, VA)

    2002-12-17T23:59:59.000Z

    A multi-mode gain fiber is provided which affords substantial improvements in the maximum pulse energy, peak power handling capabilities, average output power, and/or pumping efficiency of fiber amplifier and laser sources while maintaining good beam quality (comparable to that of a conventional single-mode fiber source). These benefits are realized by coiling the multimode gain fiber to induce significant bend loss for all but the lowest-order mode(s).

  18. Multi-Channel and Multi-Rate Adaptation for High-Throughput Wireless Networks

    E-Print Network [OSTI]

    Nguyen, Duy Duc

    2012-01-01T23:59:59.000Z

    layer. Unlike wired networks, wireless networks have to deal2 Background Wireless Networks Wireless technology is allWLAN), wireless mesh networks, wireless metropolitan area

  19. Quantitive DNA Fiber Mapping

    E-Print Network [OSTI]

    Lu, Chun-Mei

    2009-01-01T23:59:59.000Z

    of California. Lu et al. : DNA Fiber Mapping page - 35 Lu etal. : DNA Fiber Mapping page - 36 a b c d e f g OV P1 cloneSp6 end T7 end Lu et al. : DNA Fiber Mapping page - 37 a b c

  20. Context-aware computing for wireless networks

    E-Print Network [OSTI]

    Ergüt, Salih

    2010-01-01T23:59:59.000Z

    Packet Delay in Wireless Networks 2 Client Side Active QueueCellular and Sensor Networks Wireless Positioning Overviewin Mobile, Ad Hoc and Wireless Networks, pages 1–10, 2006. [

  1. Software Defined Wireless Networks: Unbridling SDNs

    E-Print Network [OSTI]

    Perkins, Dmitri

    Software Defined Wireless Networks: Unbridling SDNs Salvatore Costanzo, Laura Galluccio, Giacomo at analyzing how SDN can be beneficial in wireless infrastructureless networking environments with special emphasis on wireless personal area networks (WPAN). Furthermore, a possible approach (called SDWN

  2. Cooperative Diversity Routing in Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

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

  3. Characterizing User Mobility in Wireless Networks

    E-Print Network [OSTI]

    Nunes, Bruno Astuto Arouche

    2012-01-01T23:59:59.000Z

    Symmetry of User Mobility in Wireless Networks 3.1 MobilityAnalysis of a local-area wireless network. In ACM MOBI- COMand evaluation of wireless networks and their protocols.

  4. Collaborative Firewalling in Wireless Networks Mahmoud Taghizadeh

    E-Print Network [OSTI]

    Liu, Alex X.

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

  5. FUNDAMENTAL PERFORMANCE LIMITS OF WIRELESS SENSOR NETWORKS

    E-Print Network [OSTI]

    Li, Baochun

    FUNDAMENTAL PERFORMANCE LIMITS OF WIRELESS SENSOR NETWORKS ZHIHUA HU, BAOCHUN LI Abstract. Understanding the fundamental performance limits of wireless sensor networks is critical towards. Key words. Wireless sensor networks, network capacity, network lifetime. 1. Introduction. When

  6. Wireless Sensor Network Infrastructure : Construction and Evaluation

    E-Print Network [OSTI]

    Boyer, Edmond

    Wireless Sensor Network Infrastructure : Construction and Evaluation Kamal Beydoun, Violeta Felea main features for efficient energy management in wireless sensor networks. This paper aims to present a distributed and low-cost topology construction algorithm for wireless sensor networks, addressing

  7. Hybrid matrix fiber composites

    DOE Patents [OSTI]

    Deteresa, Steven J.; Lyon, Richard E.; Groves, Scott E.

    2003-07-15T23:59:59.000Z

    Hybrid matrix fiber composites having enhanced compressive performance as well as enhanced stiffness, toughness and durability suitable for compression-critical applications. The methods for producing the fiber composites using matrix hybridization. The hybrid matrix fiber composites include two chemically or physically bonded matrix materials, whereas the first matrix materials are used to impregnate multi-filament fibers formed into ribbons and the second matrix material is placed around and between the fiber ribbons that are impregnated with the first matrix material and both matrix materials are cured and solidified.

  8. Fiber optic laser rod

    DOE Patents [OSTI]

    Erickson, G.F.

    1988-04-13T23:59:59.000Z

    A laser rod is formed from a plurality of optical fibers, each forming an individual laser. Synchronization of the individual fiber lasers is obtained by evanescent wave coupling between adjacent optical fiber cores. The fiber cores are dye-doped and spaced at a distance appropriate for evanescent wave coupling at the wavelength of the selected dye. An interstitial material having an index of refraction lower than that of the fiber core provides the optical isolation for effective lasing action while maintaining the cores at the appropriate coupling distance. 2 figs.

  9. Fiber coating method

    DOE Patents [OSTI]

    Corman, Gregory Scot (Ballston Lake, NY)

    2001-01-01T23:59:59.000Z

    A coating is applied to reinforcing fibers arranged into a tow by coaxially aligning the tow with an adjacent separation layer and winding or wrapping the tow and separation layer onto a support structure in an interleaved manner so that the separation layer separates a wrap of the tow from an adjacent wrap of the tow. A coating can then be uniformly applied to the reinforcing fibers without defects caused by fiber tow to fiber tow contact. The separation layer can be a carbon fiber veil.

  10. Insecurity of Wireless Networks

    SciTech Connect (OSTI)

    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

    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.

  11. Caching in wireless networks

    E-Print Network [OSTI]

    Niesen, Urs

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

  12. Fiber optic moisture sensor

    DOE Patents [OSTI]

    Kirkham, R.R.

    1984-08-03T23:59:59.000Z

    A method and apparatus for sensing moisture changes by utilizing optical fiber technology. One embodiment uses a reflective target at the end of an optical fiber. The reflectance of the target varies with its moisture content and can be detected by a remote unit at the opposite end of the fiber. A second embodiment utilizes changes in light loss along the fiber length. This can be attributed to changes in reflectance of cladding material as a function of its moisture content. It can also be affected by holes or inserts interposed in the cladding material and/or fiber. Changing light levels can also be coupled from one fiber to another in an assembly of fibers as a function of varying moisture content in their overlapping lengths of cladding material.

  13. Fiber optic vibration sensor

    DOE Patents [OSTI]

    Dooley, Joseph B. (Harriman, TN); Muhs, Jeffrey D. (Lenoir City, TN); Tobin, Kenneth W. (Harriman, TN)

    1995-01-01T23:59:59.000Z

    A fiber optic vibration sensor utilizes two single mode optical fibers supported by a housing with one optical fiber fixedly secured to the housing and providing a reference signal and the other optical fiber having a free span length subject to vibrational displacement thereof with respect to the housing and the first optical fiber for providing a signal indicative of a measurement of any perturbation of the sensor. Damping or tailoring of the sensor to be responsive to selected levels of perturbation is provided by altering the diameter of optical fibers or by immersing at least a portion of the free span length of the vibration sensing optical fiber into a liquid of a selected viscosity.

  14. Fiber optic vibration sensor

    DOE Patents [OSTI]

    Dooley, J.B.; Muhs, J.D.; Tobin, K.W.

    1995-01-10T23:59:59.000Z

    A fiber optic vibration sensor utilizes two single mode optical fibers supported by a housing with one optical fiber fixedly secured to the housing and providing a reference signal and the other optical fiber having a free span length subject to vibrational displacement thereof with respect to the housing and the first optical fiber for providing a signal indicative of a measurement of any perturbation of the sensor. Damping or tailoring of the sensor to be responsive to selected levels of perturbation is provided by altering the diameter of optical fibers or by immersing at least a portion of the free span length of the vibration sensing optical fiber into a liquid of a selected viscosity. 2 figures.

  15. Optical Fibers Optics and Photonics

    E-Print Network [OSTI]

    Palffy-Muhoray, Peter

    Optical Fibers Optics and Photonics Dr. Palffy-Muhoray Ines Busuladzic Department of Theoretical and Applied Mathematics The University of Akron April 21, 2008 #12;Outline · History of optical fibers · What are optical fibers? · How are optical fibers made? · Light propagation through optical fibers · Application

  16. Map of wireless networks For more information on University wireless services visit

    E-Print Network [OSTI]

    Martin, Stephen John

    Map of wireless networks For more information on University wireless services visit: http://www.shef.ac.uk/cics/wireless. Corporate Information and Computing Services. Connecting To the Wireless Network. Mac OS X, Apple iPhone and iPod Touch #12;Connecting to the eduroam wireless network Mac OS X Prerequisites Mac OS X 10

  17. Fiber composite flywheel rim

    DOE Patents [OSTI]

    Davis, D.E.; Ingham, K.T.

    1987-04-28T23:59:59.000Z

    A flywheel comprising a hub having at least one radially projecting disc, an annular rim secured to said disc and providing a surface circumferential to said hub, a first plurality of resin-impregnated fibers wound about said rim congruent to said surface, and a shell enclosing said first plurality of fibers and formed by a second plurality of resin-impregnated fibers wound about said rim tangentially to said surface. 2 figs.

  18. Fiber optic micro accelerometer

    DOE Patents [OSTI]

    Swierkowski, Steve P.

    2005-07-26T23:59:59.000Z

    An accelerometer includes a wafer, a proof mass integrated into the wafer, at least one spring member connected to the proof mass, and an optical fiber. A Fabry-Perot cavity is formed by a partially reflective surface on the proof mass and a partially reflective surface on the end of the optical fiber. The two partially reflective surfaces are used to detect movement of the proof mass through the optical fiber, using an optical detection system.

  19. Continuous Fiber Ceramic Composites

    SciTech Connect (OSTI)

    None

    2002-09-01T23:59:59.000Z

    Fiber-reinforced ceramic composites demonstrate the high-temperature stability of ceramics--with an increased fracture toughness resulting from the fiber reinforcement of the composite. The material optimization performed under the continuous fiber ceramic composites (CFCC) included a series of systematic optimizations. The overall goals were to define the processing window, to increase the robustinous of the process, to increase process yield while reducing costs, and to define the complexity of parts that could be fabricated.

  20. Fiber composite flywheel rim

    DOE Patents [OSTI]

    Davis, Donald E. (Thousand Oaks, CA); Ingham, Kenneth T. (Woodland Hills, CA)

    1987-01-01T23:59:59.000Z

    A flywheel 2 comprising a hub 4 having at least one radially projecting disc 6, an annular rim 14 secured to said disc and providing a surface circumferential to said hub, a first plurality of resin-impregnated fibers 22 wound about said rim congruent to said surface, and a shell 26 enclosing said first plurality of fibers and formed by a second plurality of resin-impregnated fibers wound about said rim tangentially to said surface.

  1. Multi-hop routing for wireless mesh networks

    E-Print Network [OSTI]

    Bhorkar, Abhijeet

    2012-01-01T23:59:59.000Z

    in Wireless Mesh Networks . . . . . . . . . . . . . 1.2in Mobile, Ad Hoc, and Wireless Networks (WiOpt), [45] Amanin ICDCS Workshop on Wireless Networks and Mobile Computing,

  2. Maximizing the throughput of large ad hoc wireless networks

    E-Print Network [OSTI]

    Hua, Yingbo; Huang, Yi; J, Garcia-Luna-Aceves J

    2006-01-01T23:59:59.000Z

    The transport capacity of wireless networks over fadingimprovement of ad hoc wireless networks using directionalThe capacity of wireless networks,” IEEE Trans. Inform.

  3. Traffic Management and Net Neutrality in Wireless Networks

    E-Print Network [OSTI]

    Jordan, Scott

    2011-01-01T23:59:59.000Z

    and resource allocation in wireless multimedia networks.between wired and wireless networks, and hence on potentialManagement for Wireless Networks. Artech House Publishers,

  4. Power Scheduling for Multi-Hop Wireless Networks

    E-Print Network [OSTI]

    Yu, Yuan

    2009-01-01T23:59:59.000Z

    The capacity of wireless networks,” IEEE Trans. Inform.capacity of hybrid wireless networks,” in Infocom, 2003, pp.larization for MIMO wireless networks,” IEEE Transactions on

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

    E-Print Network [OSTI]

    Huang, Yi

    2010-01-01T23:59:59.000Z

    processing for a wireless sensor networks. Each circle ’S’techniques in wireless sensor networks: A survey,” IEEEestimation for wireless sensor networks, part i: Gaussian

  6. Improving the performance of distributed simulations of wireless sensor networks

    E-Print Network [OSTI]

    Jin, Zhong-Yi

    2010-01-01T23:59:59.000Z

    Overview of Wireless Sensor Networks . . 2.1.2 Difficultiesin parallel a wireless sensor network with two duty cycledin parallel a wireless sensor network with three nodes that

  7. Scalable Coverage Maintenance for Dense Wireless Sensor Networks

    E-Print Network [OSTI]

    Lu, Jun; Wang, Jinsu; Suda, Tatsuya

    2007-01-01T23:59:59.000Z

    get coverage in wireless sensor networks,” in Proceedings ofscheme for large wireless sensor networks,” in Pro- ceedingsWorkshop on Wireless Sensor Networks and Applications (

  8. Cubic-based 3-D Localization for Wireless Sensor Networks

    E-Print Network [OSTI]

    Shwe, Hnin Yu; Chong, Peter HJ

    2013-01-01T23:59:59.000Z

    Scheme in Stereo Wireless Sensor Networks,” in Advances infor mobile wireless sensor networks," Ad Hoc Networks, vol.and B. D. O. Anderson, "Wireless sensor network localization

  9. Data-driven modeling of phenomena in wireless sensor networks

    E-Print Network [OSTI]

    Kamthe, Ankur U.

    2012-01-01T23:59:59.000Z

    experimentation in wireless sensor networks. Commun. ACM,of Phenomena in Wireless Sensor Networks A dissertationBoavida, editors, Wireless Sensor Networks, volume 5970 of

  10. Decentralized TDOA Sensor Pairing in Multihop Wireless Sensor Networks

    E-Print Network [OSTI]

    Meng, Wei; Lihua, Xie; Wendong, Xiao

    2013-01-01T23:59:59.000Z

    localization in wireless sensor networks,” IEEE Signallocalization in wireless sensor networks,” IEEE Trans.techniques for wireless sensor networks: A survey,” IEEE

  11. Reliable and Efficient Programming Abstractions for Wireless Sensor Networks

    E-Print Network [OSTI]

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

    2007-01-01T23:59:59.000Z

    Macro-programming wireless sensor networks using Kairos. InAbstractions for Wireless Sensor Networks Nupur Kothari ?Keywords Wireless Sensor Networks, Macroprogramming, En-

  12. Carbon Fiber SMC

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

    confidential, or otherwise restricted information. ACC932 Materials and Processes Technology Development Carbon Fiber SMC 5-20-09 Charles Knakal USCAR C. S. Wang General Motors...

  13. Fiber Mesh Diagnostic

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

    Fiber Mesh Diagnostic for Transverse Profile Measurements RadiaBeam Technologies October 2010 ATF User's Meeting R. Agustsson (PI), G. Andonian, A. Murokh, R. Tikhoplav Funded by...

  14. Carbon Fiber Technology Facility

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

    conventional and alternative precursors to carbon fiber Advance high-volume composite design and manufacturing capabilities Transition technology to industry partners...

  15. Power Management in Wireless Networks Kevin Klues

    E-Print Network [OSTI]

    Jain, Raj

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

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

    E-Print Network [OSTI]

    Dai, Lillian Lei, 1978-

    2008-01-01T23:59:59.000Z

    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 ...

  17. Multimode optical fiber

    DOE Patents [OSTI]

    Bigot-Astruc, Marianne; Molin, Denis; Sillard, Pierre

    2014-11-04T23:59:59.000Z

    A depressed graded-index multimode optical fiber includes a central core, an inner depressed cladding, a depressed trench, an outer depressed cladding, and an outer cladding. The central core has an alpha-index profile. The depressed claddings limit the impact of leaky modes on optical-fiber performance characteristics (e.g., bandwidth, core size, and/or numerical aperture).

  18. Fiber optic hydrophone

    DOE Patents [OSTI]

    Kuzmenko, P.J.; Davis, D.T.

    1994-05-10T23:59:59.000Z

    A miniature fiber optic hydrophone based on the principles of a Fabry-Perot interferometer is disclosed. The hydrophone, in one embodiment, includes a body having a shaped flexible bladder at one end which defines a volume containing air or suitable gas, and including a membrane disposed adjacent a vent. An optical fiber extends into the body with one end terminating in spaced relation to the membrane. Acoustic waves in the water that impinge on the bladder cause the pressure of the volume therein to vary causing the membrane to deflect and modulate the reflectivity of the Fabry-Perot cavity formed by the membrane surface and the cleaved end of the optical fiber disposed adjacent to the membrane. When the light is transmitted down the optical fiber, the reflected signal is amplitude modulated by the incident acoustic wave. Another embodiment utilizes a fluid filled volume within which the fiber optic extends. 2 figures.

  19. 1 INTRODUCTION Wireless sensor networks tailored for structural

    E-Print Network [OSTI]

    Lynch, Jerome P.

    1 INTRODUCTION Wireless sensor networks tailored for structural monitoring applications have grown motivated researchers to explore wireless sensor networks for structural monitoring applications. Wireless in popularity since their initial introduction in the mid-1990s. Wireless sensors have the potential

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

    DOE Patents [OSTI]

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

    2012-05-08T23:59:59.000Z

    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.

  1. Wireless passive radiation sensor

    DOE Patents [OSTI]

    Pfeifer, Kent B; Rumpf, Arthur N; Yelton, William G; Limmer, Steven J

    2013-12-03T23:59:59.000Z

    A novel measurement technique is employed using surface acoustic wave (SAW) devices, passive RF, and radiation-sensitive films to provide a wireless passive radiation sensor that requires no batteries, outside wiring, or regular maintenance. The sensor is small (<1 cm.sup.2), physically robust, and will operate unattended for decades. In addition, the sensor can be insensitive to measurement position and read distance due to a novel self-referencing technique eliminating the need to measure absolute responses that are dependent on RF transmitter location and power.

  2. Fiber optic hydrogen sensor

    DOE Patents [OSTI]

    Buchanan, B.R.; Prather, W.S.

    1991-01-01T23:59:59.000Z

    Apparatus and method for detecting a chemical substance by exposing an optic fiber having a core and a cladding to the chemical substance so that the chemical substance can be adsorbed onto the surface of the cladding. The optic fiber is coiled inside a container having a pair of valves for controlling the entrance and exit of the substance. Light from a light source is received by one end of the optic fiber, preferably external to the container, and carried by the core of the fiber. Adsorbed substance changes the transmissivity of the fiber as measured by a spectrophotometer at the other end, also preferably external to the container. Hydrogen is detected by the absorption of infrared light carried by an optic fiber with a silica cladding. Since the adsorption is reversible, a sensor according to the present invention can be used repeatedly. Multiple positions in a process system can be monitored using a single container that can be connected to each location to be monitored so that a sample can be obtained for measurement, or, alternatively, containers can be placed near each position and the optic fibers carrying the partially-absorbed light can be multiplexed for rapid sequential reading, by a single spectrophotometer.

  3. 1Center for Wireless Technology Eindhoven Where innovation starts

    E-Print Network [OSTI]

    Franssen, Michael

    1Center for Wireless Technology Eindhoven Where innovation starts Department of Electrical Engineering Center for Wireless Technology Eindhoven #12;2 3Center for Wireless Technology Eindhoven Wireless Technology Eindhoven The Center for Wireless Technology The recent establishment of the Center for Wireless

  4. Fiber optic compass development

    E-Print Network [OSTI]

    Park, Kyongtae

    2005-11-01T23:59:59.000Z

    is illustrated schematically in Fig. 3-1. The light source is an erbium doped fiber (EDF) laser in the ring configuration [11-12]. Total amplified spontaneous emission (ASE) power is 7 mW at 45 mW pump power. The laser is spectrally scanned in the 1525 ~ 1565... optic modulator and amplified by a commercial erbium- doped fiber amplifier (EDFA). The spectrum of the laser after amplification at 6 different wavelengths is shown in Fig. 3-3. After amplification, the light passes through a fiber coupler...

  5. Fiber bundle phase conjugate mirror

    DOE Patents [OSTI]

    Ward, Benjamin G.

    2012-05-01T23:59:59.000Z

    An improved method and apparatus for passively conjugating the phases of a distorted wavefronts resulting from optical phase mismatch between elements of a fiber laser array are disclosed. A method for passively conjugating a distorted wavefront comprises the steps of: multiplexing a plurality of probe fibers and a bundle pump fiber in a fiber bundle array; passing the multiplexed output from the fiber bundle array through a collimating lens and into one portion of a non-linear medium; passing the output from a pump collection fiber through a focusing lens and into another portion of the non-linear medium so that the output from the pump collection fiber mixes with the multiplexed output from the fiber bundle; adjusting one or more degrees of freedom of one or more of the fiber bundle array, the collimating lens, the focusing lens, the non-linear medium, or the pump collection fiber to produce a standing wave in the non-linear medium.

  6. Wireless Power Transfer

    ScienceCinema (OSTI)

    None

    2013-11-19T23:59:59.000Z

    Wireless Power Transfer is an innovative approach using magnetic resonance coupling of air core transformers designed for today's growing plug-in electric vehicle market. This technology can provide a convenient, safe and flexible means to charge electric vehicles under stationary and dynamic conditions. Plug-in Electric Vehicles (PEV) are burdened by the need for cable and plug charger, galvanic isolation of the on-board electronics, bulk and cost of this charger and the large energy storage system (ESS) packs needed. With a system where you have to physically plug in there are a number of occasions where the owner could very well forget to charge the vehicle. For stationary applications (like charging of a PHEV at home), ORNL's innovative wireless power transfer technology adds a convenience factor compared to actually plugging in which will mean that the vehicle will have a full charge every morning. Electric vehicle charging must be safe, compact and efficient in order to be convenient for customers. By reconfiguring the transformer and altering the resonance frequency, energy is transferred to the battery with lower energy losses and with fewer demands on the primary circuit by the rest of the transformer system. The ORNL discovery shows that sufficient power for the battery can be transferred from the primary to secondary circuits without significant energy losses if the operating frequency is set at 50% to 95% of the resonance frequency of the circuit. The electrical power is then transmitted to the chargeable battery, which is electrically coupled to the secondary circuit through the air core transformer. Some advantages include: Reduced energy losses during transfer of energy to the battery; A charge potential that is relatively unaffected by up to 25% misalignment of vehicle; and Other receiving components draw less power from the primary circuit. These advantages allow wireless power technology applications to expand at the workplace and beyond as the demand for EV rises. For vehicles that operate over a fixed route such as busses and shuttle vehicles, Wireless Power Transfer (WPT) means that a smaller battery pack can be used. In the traditional system, the battery pack is designed to accommodate the needs of the entire route or shift. With WPT the battery can be downsized because it can be charged when the vehicle stops on its route (a rental car shuttle bus, for example, can charge when it waits in the terminal and again when it waits at the rental car place. Thus the battery only needs enough charge to get to the next stop. This decrease in battery size means significant cost savings to electrify the vehicle. This technology enables efficient "opportunity charging stations" for predefined routes and planned stops reducing down time. Charging can occur in minutes. This improvement also eliminates the harmful emissions that occur in garages while buses are at idle during charging. In larger cities, dynamic charging offers an even greater impact utilizing existing infrastructure. As vehicles travel along busy freeways and interstate systems, wireless charging can occur while the vehicle is in motion. With this technology a vehicle essentially has unlimited electric range while using a relatively small battery pack. In-motion charging stations use vehicle sensors to alert the driver. Traveling at normal speeds, sensors establish in-motion charging. WPT transmit pads sequentially energize to the negotiated power level based on vehicle speed and its requested charging energy. Lower power when vehicle speed is slow and much higher power for faster moving vehicles. Vehicle to Infrastructure communications (V2I) coordinates WPT charging level according to on-board battery pack state-of-charge. V2I activates the roadway transmit pads placing them in standby mode and negotiates charging fee based on prevailing grid rate and vehicle energy demand. Dynamic charging would allow electricity to supply a very large fraction of the energy for the transportation sector and reduce greatly petroleum consump

  7. Wireless Power Transfer

    SciTech Connect (OSTI)

    None

    2013-07-22T23:59:59.000Z

    Wireless Power Transfer is an innovative approach using magnetic resonance coupling of air core transformers designed for today's growing plug-in electric vehicle market. This technology can provide a convenient, safe and flexible means to charge electric vehicles under stationary and dynamic conditions. Plug-in Electric Vehicles (PEV) are burdened by the need for cable and plug charger, galvanic isolation of the on-board electronics, bulk and cost of this charger and the large energy storage system (ESS) packs needed. With a system where you have to physically plug in there are a number of occasions where the owner could very well forget to charge the vehicle. For stationary applications (like charging of a PHEV at home), ORNL's innovative wireless power transfer technology adds a convenience factor compared to actually plugging in which will mean that the vehicle will have a full charge every morning. Electric vehicle charging must be safe, compact and efficient in order to be convenient for customers. By reconfiguring the transformer and altering the resonance frequency, energy is transferred to the battery with lower energy losses and with fewer demands on the primary circuit by the rest of the transformer system. The ORNL discovery shows that sufficient power for the battery can be transferred from the primary to secondary circuits without significant energy losses if the operating frequency is set at 50% to 95% of the resonance frequency of the circuit. The electrical power is then transmitted to the chargeable battery, which is electrically coupled to the secondary circuit through the air core transformer. Some advantages include: Reduced energy losses during transfer of energy to the battery; A charge potential that is relatively unaffected by up to 25% misalignment of vehicle; and Other receiving components draw less power from the primary circuit. These advantages allow wireless power technology applications to expand at the workplace and beyond as the demand for EV rises. For vehicles that operate over a fixed route such as busses and shuttle vehicles, Wireless Power Transfer (WPT) means that a smaller battery pack can be used. In the traditional system, the battery pack is designed to accommodate the needs of the entire route or shift. With WPT the battery can be downsized because it can be charged when the vehicle stops on its route (a rental car shuttle bus, for example, can charge when it waits in the terminal and again when it waits at the rental car place. Thus the battery only needs enough charge to get to the next stop. This decrease in battery size means significant cost savings to electrify the vehicle. This technology enables efficient "opportunity charging stations" for predefined routes and planned stops reducing down time. Charging can occur in minutes. This improvement also eliminates the harmful emissions that occur in garages while buses are at idle during charging. In larger cities, dynamic charging offers an even greater impact utilizing existing infrastructure. As vehicles travel along busy freeways and interstate systems, wireless charging can occur while the vehicle is in motion. With this technology a vehicle essentially has unlimited electric range while using a relatively small battery pack. In-motion charging stations use vehicle sensors to alert the driver. Traveling at normal speeds, sensors establish in-motion charging. WPT transmit pads sequentially energize to the negotiated power level based on vehicle speed and its requested charging energy. Lower power when vehicle speed is slow and much higher power for faster moving vehicles. Vehicle to Infrastructure communications (V2I) coordinates WPT charging level according to on-board battery pack state-of-charge. V2I activates the roadway transmit pads placing them in standby mode and negotiates charging fee based on prevailing grid rate and vehicle energy demand. Dynamic charging would allow electricity to supply a very large fraction of the energy for the transportation sector and reduce greatly petroleum consump

  8. Fiber alignment apparatus and method

    DOE Patents [OSTI]

    Kravitz, Stanley H. (Placitas, NM); Warren, Mial Evans (Albuquerque, NM); Snipes, Jr., Morris Burton (Albuquerque, NM); Armendariz, Marcelino Guadalupe (Albuquerque, NM); Word, V., James Cole (Albuqueruqe, NM)

    1997-01-01T23:59:59.000Z

    A fiber alignment apparatus includes a micro-machined nickel spring that captures and locks arrays of single mode fibers into position. The design consists of a movable nickel leaf shaped spring and a fixed pocket where fibers are held. The fiber is slid between the spring and a fixed block, which tensions the spring. When the fiber reaches the pocket, it automatically falls into the pocket and is held by the pressure of the leaf spring.

  9. Cooperative multicast in wireless networks

    E-Print Network [OSTI]

    Li, Fulu, 1970-

    2005-01-01T23:59:59.000Z

    Wireless communication has fundamental impairments due to multi-path fading, attenuation, reflections, obstructions, and noise. More importantly, it has historically been designed to mimic a physical wire; in concept other ...

  10. Introgression & mapping Fiber cell

    E-Print Network [OSTI]

    Germplasm Introgression Genomics & mapping Fiber cell initiation Radiation hybrid (RH) mapping and breeding. Research activities commonly include plant breeding, genetics, genomics, cytogenetics, molecular methods. (C, S) · Contribute uniquely to genomics and its relevance to genetic improvement (C,S) · Harness

  11. Optoelectronic fiber interface design

    E-Print Network [OSTI]

    Spencer, Matthew Edmund

    2008-01-01T23:59:59.000Z

    Recent developments in materials science have led to the development of an exciting, new class of fibers which integrate metals, semiconductors and insulators in the same codrawing process. Various electrical devices have ...

  12. Multimaterial rectifying device fibers

    E-Print Network [OSTI]

    Orf, Nicholas D

    2009-01-01T23:59:59.000Z

    Electronic and optoelectronic device processing is commonly thought to be incompatible with much simpler thermal drawing techniques used in optical fiber production. The incorporation of metals, polymer insulators, and ...

  13. Dark Soliton Fiber Laser

    E-Print Network [OSTI]

    H. Zhang; D. Y. Tang; L. M. Zhao; X. Wu; Q. L. Bao; K. P. Loh

    2009-05-08T23:59:59.000Z

    We report on the experimental observation of stable dark solitons in an all normal dispersion fiber laser. We found experimentally that dark soliton formation is a generic feature of the fiber laser under strong continuous wave (CW) emission. However, only under appropriate pump strength and negative cavity feedback, stable single or multiple dark soliton could be achieved. Furthermore, we show that the features of the observed dark solitons could be well understood based on the nonlinear Schrodinger equation (NLSE).

  14. Closing the Loop over Wireless Networks:Closing the Loop over Wireless Networks: Fundamentals and Applications

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    4/9/2008 1 Closing the Loop over Wireless Networks:Closing the Loop over Wireless Networks Johansson, Pan Gun Park, Emmanuel Witrant Closing the Loop over Wireless Networks:Closing the Loop over Wireless Networks: Fundamentals and Applications Karl H. Johansson Electrical Engineering, Royal Institute

  15. Carbon Fiber Pilot Plant and Research Facilities

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

    for the U.S. Department of Energy Presentationname Carbon Fiber Facilities Materials Carbon Fiber Research Facility Type Production Fiber Types Tow Size Tensioning Line...

  16. Wireless Josephson amplifier

    SciTech Connect (OSTI)

    Narla, A.; Sliwa, K. M.; Hatridge, M.; Shankar, S.; Frunzio, L.; Schoelkopf, R. J.; Devoret, M. H. [Department of Applied Physics, Yale University, New Haven, Connecticut 06511 (United States)

    2014-06-09T23:59:59.000Z

    Josephson junction parametric amplifiers are playing a crucial role in the readout chain in superconducting quantum information experiments. However, their integration with current 3D cavity implementations poses the problem of transitioning between waveguide, coax cables, and planar circuits. Moreover, Josephson amplifiers require auxiliary microwave components, like directional couplers and/or hybrids, that are sources of spurious losses and impedance mismatches that limit measurement efficiency and amplifier tunability. We have developed a wireless architecture for these parametric amplifiers that eliminates superfluous microwave components and interconnects. This greatly simplifies their assembly and integration into experiments. We present an experimental realization of such a device operating in the 9–11?GHz band with about 100?MHz of amplitude gain-bandwidth product, on par with devices mounted in conventional sample holders. The simpler impedance environment presented to the amplifier also results in increased amplifier tunability.

  17. A miniature, implantable wireless neural stimulation system

    E-Print Network [OSTI]

    Arfin, Scott K. (Scott Kenneth)

    2006-01-01T23:59:59.000Z

    In this thesis, I present the design of a wireless neural stimulation system. The system consists of an external transmitter, controllable through a computer interface, and a miniature, implantable wireless receiver and ...

  18. Network coding for robust wireless networks

    E-Print Network [OSTI]

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

    2012-01-01T23:59:59.000Z

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

  19. Efficient network camouflaging in wireless networks 

    E-Print Network [OSTI]

    Jiang, Shu

    2006-04-12T23:59:59.000Z

    when protected networks are wireless networks, such as sensor networks and mobile ad hoc networks. The reason is that wireless networks are typically subject to resource constraints (e.g. bandwidth, power supply) and possess some unique characteristics...

  20. Energy and quality scalable wireless communication

    E-Print Network [OSTI]

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

    2003-01-01T23:59:59.000Z

    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 ...

  1. Improving performance of TCP over wireless networks

    E-Print Network [OSTI]

    Mehta, Miten N.

    1998-01-01T23:59:59.000Z

    TCP has been designed and tuned to perform well on a phics. wired network made up of links with low bit-error rates. Wireless networks and heterogeneous networks consisting of wired and wireless links have many different characteristics compared...

  2. Wilis: Architectural Modeling of Wireless Systems

    E-Print Network [OSTI]

    Fleming, Kermin Elliott

    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 ...

  3. Transmission Power Management for Wireless Health Applications

    E-Print Network [OSTI]

    Amini, Navid

    2012-01-01T23:59:59.000Z

    Characterization of Smart Insoles Wireless Communications .. 65   5.2.1 Effect of Packet Size on Battery

  4. Enhanced radiation resistant fiber optics

    DOE Patents [OSTI]

    Lyons, P.B.; Looney, L.D.

    1993-11-30T23:59:59.000Z

    A process for producing an optical fiber having enhanced radiation resistance is provided, the process including maintaining an optical fiber within a hydrogen-containing atmosphere for sufficient time to yield a hydrogen-permeated optical fiber having an elevated internal hydrogen concentration, and irradiating the hydrogen-permeated optical fiber at a time while the optical fiber has an elevated internal hydrogen concentration with a source of ionizing radiation. The radiation source is typically a cobalt-60 source and the fiber is pre-irradiated with a dose level up to about 1000 kilorads of radiation. 4 figures.

  5. Enhanced radiation resistant fiber optics

    DOE Patents [OSTI]

    Lyons, Peter B. (Los Alamos, NM); Looney, Larry D. (Los Alamos, NM)

    1993-01-01T23:59:59.000Z

    A process for producing an optical fiber having enhanced radiation resitance is provided, the process including maintaining an optical fiber within a hydrogen-containing atmosphere for sufficient time to yield a hydrogen-permeated optical fiber having an elevated internal hydrogen concentration, and irradiating the hydrogen-permeated optical fiber at a time while the optical fiber has an elevated internal hydrogen concentration with a source of ionizing radiation. The radiation source is typically a cobalt-60 source and the fiber is pre-irradiated with a dose level up to about 1000 kilorads of radiation.

  6. Wireless device monitoring systems and monitoring devices, and associated methods

    DOE Patents [OSTI]

    McCown, Steven H; Derr, Kurt W; Rohde, Kenneth W

    2014-05-27T23:59:59.000Z

    Wireless device monitoring systems and monitoring devices include a communications module for receiving wireless communications of a wireless device. Processing circuitry is coupled with the communications module and configured to process the wireless communications to determine whether the wireless device is authorized or unauthorized to be present at the monitored area based on identification information of the wireless device. Methods of monitoring for the presence and identity of wireless devices are also provided.

  7. Power Control in Wireless Cellular Networks

    E-Print Network [OSTI]

    Chiang, Mung

    Power Control in Wireless Cellular Networks #12;#12;Power Control in Wireless Cellular Networks R in Networking sample Vol. x, No y (2008) 1­156 c 2008 Power Control in Wireless Cellular Networks, and connectivity. Power control in both uplink and downlink of a cellular network has been extensively studied

  8. EEL 6591: Wireless Networks Spring 2014

    E-Print Network [OSTI]

    Latchman, Haniph A.

    EEL 6591: Wireless Networks Spring 2014 Instructor: Professor Yuguang "Michael" Fang Contact: 435-Hall, 2002. References: 1. Broadband Wireless Multimedia Networks by Benny Bing, John Wiley, 2013. 2. Wireless and Mobile Network Architecture by Yi-Bing Lin and Imrich Chlamtac, John Wiley & Sons, 2000. 3

  9. Radioactive Target Detection Using Wireless Sensor Network

    E-Print Network [OSTI]

    Zhang, Tonglin

    Chapter 31 Radioactive Target Detection Using Wireless Sensor Network Tonglin Zhang Abstract for wireless sensor network data to detect and locate a hidden nuclear target in a large study area. The method assumes multiple radiation detectors have been used as sensor nodes in a wireless sensor network

  10. Gradient Clock Synchronization in Wireless Sensor Networks

    E-Print Network [OSTI]

    Gradient Clock Synchronization in Wireless Sensor Networks Philipp Sommer Computer Engineering- olution. Without doubt, time is a first-class citizen in wireless sensor networks. Without accurate time if the nodes in the wireless sensor network manage to have an adequate agreement of time. Indeed

  11. Optimal Deployment of Impromptu Wireless Sensor Networks

    E-Print Network [OSTI]

    Kumar, Anurag

    Optimal Deployment of Impromptu Wireless Sensor Networks Prasenjit Mondal, K. P. Naveen and Anurag to deploy sensors (such as motion sensors, or even imaging sensors) and a wireless interconnection network an impromptu deploy- ment of a wireless sensor network in a building. Fig. 2. Problem studied in this paper

  12. Distributed A Wireless Sensor Network for

    E-Print Network [OSTI]

    Distributed Computing A Wireless Sensor Network for Orienteering Competitions Master's Thesis-wave Monopole Antennas . . . . . . . . . . . . . 13 5 MAC and Routing in Wireless Sensor Networks 14 5.1 Medium and waterproof cases free of charge. i #12;Abstract This thesis deals with the development of a wireless sensor

  13. A Virtual Infrastructure for Wireless Sensor Networks

    E-Print Network [OSTI]

    Stojmenovic, Ivan

    &CHAPTER 4 A Virtual Infrastructure for Wireless Sensor Networks STEPHAN OLARIU and QINGWEN XU Old, and wireless communications 107 Handbook of Sensor Networks: Algorithms and Architectures, Edited by I and communication infra- structures, called wireless sensor networks, will have a significant impact on a wide array

  14. TESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS

    E-Print Network [OSTI]

    Trajkovic, Ljiljana

    of Nikola Tesla #12;January 17, 2005 UBC Ljiljana Trajkovic, Simon Fraser University 9 Wireless patentsTESLA'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

  15. Low Cost Carbon Fiber Production Carbon Fiber Manufacturing Cost Modeling

    E-Print Network [OSTI]

    to bond with composite matrix material. It is important that a carbon fiber manufacturing cost model manufactured with carbon fiber as opposed to traditional materials such as steel, automotive parts are able associated with both the manufacture of carbon fibers themselves as well as their composites. Traditional

  16. Optical and optoelectronic fiber devices

    E-Print Network [OSTI]

    Shapira, Ofer, Ph. D. Massachusetts Institute of Technology

    2007-01-01T23:59:59.000Z

    The ability to integrate materials with disparate electrical, thermal, and optical properties into a single fiber structure enabled the realization of fiber devices with diverse and complex functionalities. Amongst those, ...

  17. Distributed optical fiber vibration sensing 

    E-Print Network [OSTI]

    Yu, Hui

    2001-01-01T23:59:59.000Z

    This thesis presents a distributed optical fiber vibration sensor. The purpose of this sensing system is to monitor, in real time, the status of railcars by burying an optical fiber underground beside the rails. Using a coherent homodyne technique...

  18. Fiber Supply Associate Company Overview

    E-Print Network [OSTI]

    Mazzotti, Frank

    materials acquisition, harvesting, logistics coordination, contract negotiations, and inventory management, Purchasing, Industrial Engineering, Operations management, Materials Management, Supply Chain) Authorized leadership roles such as Fiber Specialist, Fiber Supply Manager, Region Manager, Director, General Manager

  19. Automated fiber pigtailing machine

    DOE Patents [OSTI]

    Strand, O.T.; Lowry, M.E.

    1999-01-05T23:59:59.000Z

    The Automated Fiber Pigtailing Machine (AFPM) aligns and attaches optical fibers to optoelectronic (OE) devices such as laser diodes, photodiodes, and waveguide devices without operator intervention. The so-called pigtailing process is completed with sub-micron accuracies in less than 3 minutes. The AFPM operates unattended for one hour, is modular in design and is compatible with a mass production manufacturing environment. This machine can be used to build components which are used in military aircraft navigation systems, computer systems, communications systems and in the construction of diagnostics and experimental systems. 26 figs.

  20. Automated fiber pigtailing machine

    DOE Patents [OSTI]

    Strand, Oliver T. (Castro Valley, CA); Lowry, Mark E. (Castro Valley, CA)

    1999-01-01T23:59:59.000Z

    The Automated Fiber Pigtailing Machine (AFPM) aligns and attaches optical fibers to optoelectonic (OE) devices such as laser diodes, photodiodes, and waveguide devices without operator intervention. The so-called pigtailing process is completed with sub-micron accuracies in less than 3 minutes. The AFPM operates unattended for one hour, is modular in design and is compatible with a mass production manufacturing environment. This machine can be used to build components which are used in military aircraft navigation systems, computer systems, communications systems and in the construction of diagnostics and experimental systems.

  1. Silicon fiber optic sensors

    DOE Patents [OSTI]

    Pocha, Michael D. (Livermore, CA); Swierkowski, Steve P. (Livermore, CA); Wood, Billy E. (Livermore, CA)

    2007-10-02T23:59:59.000Z

    A Fabry-Perot cavity is formed by a partially or wholly reflective surface on the free end of an integrated elongate channel or an integrated bounding wall of a chip of a wafer and a partially reflective surface on the end of the optical fiber. Such a constructed device can be utilized to detect one or more physical parameters, such as, for example, strain, through the optical fiber using an optical detection system to provide measuring accuracies of less than aboutb0.1%.

  2. Opportunistic Source Coding for Data Gathering in Wireless Sensor Networks

    E-Print Network [OSTI]

    1 Opportunistic Source Coding for Data Gathering in Wireless Sensor Networks Tao Cui, Lijun Chen capacity of multihop wireless networks, an important topic addressed by wireless sensor networks community for correlated data gathering in wireless sensor networks, which ex- ploits the broadcast nature of wireless

  3. Genetics of Cotton Fiber Elongation

    E-Print Network [OSTI]

    Ng, Eng Hwa

    2013-05-29T23:59:59.000Z

    ability GxE Genotype by environment interaction HVI High volume instrument Mic Micronaire (HVI) SCA Specific combining ability Str-H Fiber strength (HVI) Str-S Fiber strength (Stelometer) UHML Upper-half mean length (HVI) UI Uniformity index... Station, TX .................................................................................... 38 5 Mean squares of GCA and SCA for HVI fiber properties in 2010 and 2011 in College Station, TX...

  4. Aerogel-clad optical fiber

    DOE Patents [OSTI]

    Sprehn, G.A.; Hrubesh, L.W.; Poco, J.F.; Sandler, P.H.

    1997-11-04T23:59:59.000Z

    An optical fiber is surrounded by an aerogel cladding. For a low density aerogel, the index of refraction of the aerogel is close to that of air, which provides a high numerical aperture to the optical fiber. Due to the high numerical aperture, the aerogel clad optical fiber has improved light collection efficiency. 4 figs.

  5. Large core fiber optic cleaver

    DOE Patents [OSTI]

    Halpin, J.M.

    1996-03-26T23:59:59.000Z

    The present invention relates to a device and method for cleaving optical fibers which yields cleaved optical fiber ends possessing high damage threshold surfaces. The device can be used to cleave optical fibers with core diameters greater than 400 {micro}m. 30 figs.

  6. Large core fiber optic cleaver

    DOE Patents [OSTI]

    Halpin, John M. (Livermore, CA)

    1996-01-01T23:59:59.000Z

    The present invention relates to a device and method for cleaving optical fibers which yields cleaved optical fiber ends possessing high damage threshold surfaces. The device can be used to cleave optical fibers with core diameters greater than 400 .mu.m.

  7. Wireless technology for integrated manufacturing

    SciTech Connect (OSTI)

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

    1996-08-01T23:59:59.000Z

    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.

  8. WIRELESS FOR A NUCLEAR FACILITY

    SciTech Connect (OSTI)

    Shull, D; Joe Cordaro, J

    2007-03-28T23:59:59.000Z

    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''.

  9. Drying of fiber webs

    DOE Patents [OSTI]

    Warren, David W. (9253 Glenoaks Blvd., Sun Valley, CA 91352)

    1997-01-01T23:59:59.000Z

    A process and an apparatus for high-intensity drying of fiber webs or sheets, such as newsprint, printing and writing papers, packaging paper, and paperboard or linerboard, as they are formed on a paper machine. The invention uses direct contact between the wet fiber web or sheet and various molten heat transfer fluids, such as liquified eutectic metal alloys, to impart heat at high rates over prolonged durations, in order to achieve ambient boiling of moisture contained within the web. The molten fluid contact process causes steam vapor to emanate from the web surface, without dilution by ambient air; and it is differentiated from the evaporative drying techniques of the prior industrial art, which depend on the uses of steam-heated cylinders to supply heat to the paper web surface, and ambient air to carry away moisture, which is evaporated from the web surface. Contact between the wet fiber web and the molten fluid can be accomplished either by submersing the web within a molten bath or by coating the surface of the web with the molten media. Because of the high interfacial surface tension between the molten media and the cellulose fiber comprising the paper web, the molten media does not appreciately stick to the paper after it is dried. Steam generated from the paper web is collected and condensed without dilution by ambient air to allow heat recovery at significantly higher temperature levels than attainable in evaporative dryers.

  10. Drying of fiber webs

    DOE Patents [OSTI]

    Warren, D.W.

    1997-04-15T23:59:59.000Z

    A process and an apparatus are disclosed for high-intensity drying of fiber webs or sheets, such as newsprint, printing and writing papers, packaging paper, and paperboard or linerboard, as they are formed on a paper machine. The invention uses direct contact between the wet fiber web or sheet and various molten heat transfer fluids, such as liquefied eutectic metal alloys, to impart heat at high rates over prolonged durations, in order to achieve ambient boiling of moisture contained within the web. The molten fluid contact process causes steam vapor to emanate from the web surface, without dilution by ambient air; and it is differentiated from the evaporative drying techniques of the prior industrial art, which depend on the uses of steam-heated cylinders to supply heat to the paper web surface, and ambient air to carry away moisture, which is evaporated from the web surface. Contact between the wet fiber web and the molten fluid can be accomplished either by submersing the web within a molten bath or by coating the surface of the web with the molten media. Because of the high interfacial surface tension between the molten media and the cellulose fiber comprising the paper web, the molten media does not appreciatively stick to the paper after it is dried. Steam generated from the paper web is collected and condensed without dilution by ambient air to allow heat recovery at significantly higher temperature levels than attainable in evaporative dryers. 6 figs.

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

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

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

  13. Estimating Wireless Network Properties with Spatial Statistics and Models

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Estimating Wireless Network Properties with Spatial Statistics and Models Janne Riihij statistics and models for different estimation problems related to wireless networks. We focus specifically wireless networks. We provide a concise survey of existing techniques from the spatial statistics

  14. WIRELESS SENSOR NETWORK BASED CONTROL SYSTEM CONCIDERING COMMUNICATION COST

    E-Print Network [OSTI]

    WIRELESS SENSOR NETWORK BASED CONTROL SYSTEM CONCIDERING COMMUNICATION COST Yutaka Iino* Takeshi for wireless sensor network based control system, minimizing communication energy consumption. Some control, wireless sensor network technology has been developed rapidly, and various applications to control system

  15. Interference-Aware Fair Rate Control in Wireless Sensor Networks

    E-Print Network [OSTI]

    Rangwala, Sumit; Gummadi, Ramakrishna; Govindan, Ramesh; Psounis, Konstantinos

    2006-01-01T23:59:59.000Z

    Protocol For Wireless Sensor Networks. In WSNA ’02. [30]Congestion in Wireless Sensor Networks. In SenSys ’04. [12]Y. Lei. A Two-Tier Wireless Sensor Network Architecture for

  16. Tracking Multiple Targets Using Binary Decisions from Wireless Sensor Networks

    E-Print Network [OSTI]

    Michailidis, George

    Tracking Multiple Targets Using Binary Decisions from Wireless Sensor Networks Natallia Katenka- tions. 1 #12;Keywords: wireless sensor networks, binary data, target tracking, multiple targets, penal- ized maximum likelihood 1 Introduction and Problem Motivation Wireless Sensor Networks (WSN) have

  17. Data Analysis and Query Processing in Wireless Sensor Networks

    E-Print Network [OSTI]

    Chatzimilioudis, Georgios

    2010-01-01T23:59:59.000Z

    5.2.2 Wireless Sensor Networks . . . . . . . . 5.33.1 De?nition of a Wireless Sensor Network . . . . . . .1.1 Introduction to Wireless Sensor Networks 1.2 Motivating

  18. Optical and mechanical behavior of the optical fiber infrasound sensor

    E-Print Network [OSTI]

    DeWolf, Scott

    2009-01-01T23:59:59.000Z

    1.2 The Optical Fiber Infrasound Sensor . . . . . . .Fiber Infrasound Sensor Optical fibers are well known forSchnidrig. An optical fiber infrasound sensor: A new lower

  19. Wireless Technologies for Structural Wireless Technologies for Structural Health MonitoringHealth Monitoring

    E-Print Network [OSTI]

    Wireless Technologies for Structural Wireless Technologies for Structural Health MonitoringHealth responses · Structural monitoring structural health monitoring: ­ Very few structural "health" monitoring and buildings · Future directions and technology trends Structural Monitoring SystemsStructural Monitoring

  20. Wesleyan Guest Wireless connection procedure. Please follow the procedure below for connecting to the Wesleyan Guest Wireless network.

    E-Print Network [OSTI]

    Devoto, Stephen H.

    for connecting to the Wesleyan Guest Wireless network. Begin by selecting the Wireless icon in the lower rightWesleyan Guest Wireless connection procedure. Windows #12;Please follow the procedure below

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

    Energy Savers [EERE]

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

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

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

  3. SoftCast: One Video to Serve All Wireless Receivers

    E-Print Network [OSTI]

    Katabi, Dina

    2009-02-07T23:59:59.000Z

    The main challenge in wireless video multicast is to scalably serve multiple receivers who have different channel characteristics. Current wireless transmission schemes, however, cannot support smooth degradation. Specifically, ...

  4. Power Sources for Wireless Sensor Abstract. Wireless sensor networks are poised to become a very significant

    E-Print Network [OSTI]

    Frechette, Luc G.

    Power Sources for Wireless Sensor Networks Abstract. Wireless sensor networks are poised to become a very significant enabling technology in many sectors. Already a few very low power wireless sensor environment, alternative power sources must be employed. This paper reviews many potential power sources

  5. Magnetic Resonant Wireless Power Delivery for Distributed Sensor and Wireless Systems

    E-Print Network [OSTI]

    Cervesato, Iliano

    Magnetic Resonant Wireless Power Delivery for Distributed Sensor and Wireless Systems Brian J. Lee, Pittsburgh, PA 15213 Abstract-- In this paper we report on a resonant wireless power delivery system using to loads distributed in the system. We experimentally map the power distribution for one and multiple loads

  6. Fiber optic fluid detector

    DOE Patents [OSTI]

    Angel, S.M.

    1987-02-27T23:59:59.000Z

    Particular gases or liquids are detected with a fiber optic element having a cladding or coating of a material which absorbs the fluid or fluids and which exhibits a change of an optical property, such as index of refraction, light transmissiveness or fluoresence emission, for example, in response to absorption of the fluid. The fluid is sensed by directing light into the fiber optic element and detecting changes in the light, such as exit angle changes for example, that result from the changed optical property of the coating material. The fluid detector may be used for such purposes as sensing toxic or explosive gases in the atmosphere, measuring ground water contamination or monitoring fluid flows in industrial processes, among other uses. 10 figs.

  7. Buried fiber optic sensor

    E-Print Network [OSTI]

    Park, Jaehee

    1992-01-01T23:59:59.000Z

    , and TMom modes. Otherwise vm gives the HEv hm and EHv-hm modest20] 18 Table I. Parameters of the laser source and the fused silica fiber which are used in this experiment. n=n1=1. 4527 n2= 1. 4483 D (core diameter )= 8 um Cladding Diameter = 125 um... Interferometer . B. Frequency Chirping of Laser Diode C. Pressure Sensitivity to Uniform Pressure . . . . . . . . . . D. Pressure Sensitivity to Transverse Pressure . . . . E. Pressure Sensitivity to Longitudinal Pressure . . . . . . . . . . I 3 . . . . 20...

  8. Fiber optic sensor and method for making

    DOE Patents [OSTI]

    Vartuli, James Scott; Bousman, Kenneth Sherwood; Deng, Kung-Li; McEvoy, Kevin Paul; Xia, Hua

    2010-05-18T23:59:59.000Z

    A fiber optic sensor including a fiber having a modified surface integral with the fiber wherein the modified surface includes an open pore network with optical agents dispersed within the open pores of the open pore network. Methods for preparing the fiber optic sensor are also provided. The fiber optic sensors can withstand high temperatures and harsh environments.

  9. Fiber laser development for LISA

    E-Print Network [OSTI]

    Kenji Numata; Jeffrey R. Chen; Jordan Camp

    2010-03-18T23:59:59.000Z

    We have developed a linearly-polarized Ytterbium-doped fiber ring laser with single longitudinal-mode output at 1064nm for LISA and other space applications. Single longitudinal-mode selection was achieved by using a fiber Bragg grating (FBG) and a fiber Fabry-Perot (FFP). The FFP also serves as a frequency-reference within our ring laser. Our laser exhibits comparable low frequency and intensity noise to Non-Planar Ring Oscillator (NPRO). By using a fiber-coupled phase modulator as a frequency actuator, the laser frequency can be electro-optically tuned at a rate of 100kHz. It appears that our fiber ring laser is promising for space applications where robustness of fiber optics is desirable.

  10. Wireless communication devices and movement monitoring methods

    DOE Patents [OSTI]

    Skorpik, James R.

    2006-10-31T23:59:59.000Z

    Wireless communication devices and movement monitoring methods are described. In one aspect, a wireless communication device includes a housing, wireless communication circuitry coupled with the housing and configured to communicate wireless signals, movement circuitry coupled with the housing and configured to provide movement data regarding movement sensed by the movement circuitry, and event processing circuitry coupled with the housing and the movement circuitry, wherein the event processing circuitry is configured to process the movement data, and wherein at least a portion of the event processing circuitry is configured to operate in a first operational state having a different power consumption rate compared with a second operational state.

  11. Wireless System Considerations When Implementing NERC Critical...

    Energy Savers [EERE]

    & Publications Recommended Practices Guide For Securing ZigBee Wireless Networks in Process Control System Environments Securing WLANs using 802.11i DOEOE National SCADA...

  12. Wireless Demand Response Controls for HVAC Systems

    E-Print Network [OSTI]

    Federspiel, Clifford

    2010-01-01T23:59:59.000Z

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

  13. System for testing optical fibers

    DOE Patents [OSTI]

    Golob, John E. [Olathe, KS; Looney, Larry D. [Los Alamos, NM; Lyons, Peter B. [Los Alamos, NM; Nelson, Melvin A. [Santa Barbara, CA; Davies, Terence J. [Santa Barbara, CA

    1980-07-15T23:59:59.000Z

    A system for measuring a combination of optical transmission properties of fiber optic waveguides. A polarized light pulse probe is injected into one end of the optical fiber. Reflections from discontinuities within the fiber are unpolarized whereas reflections of the probe pulse incident to its injection remain polarized. The polarized reflections are prevented from reaching a light detector whereas reflections from the discontinuities reaches the detector.

  14. Low Cost Carbon Fiber Overview

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

    and Processing (IT) Lignin-Based Low-Cost Carbon Fiber Precursors * Structural Materials for Vehicles (VT) * Graphite Electrodes for Arc Furnaces (IT) * Nanoporous CF for...

  15. Lower Cost Carbon Fiber Precursors

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

    production and conversion parameters must be optimized. Lower cost fiber enable CF composite applications. Approach: 1. Complete previous effort by scaling to the CF production...

  16. Carbon Fiber Consortium | Partnerships | ORNL

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

    in 2011 to accelerate the development and deployment of new, lower cost carbon fiber composite materials. The Consortium draws on the broad experience that the Oak Ridge National...

  17. Carbon Fiber Cluster Strategy | ornl.gov

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

    Carbon Fiber Cluster Strategy ORNL has a 40-year history in R&D on fiber-reinforced composite materials, and has been leading DOE's low-cost carbon fiber initiative for more than...

  18. Carbon Fiber Composite Cellular A Dissertation

    E-Print Network [OSTI]

    Wadley, Haydn

    Carbon Fiber Composite Cellular Structures ____________________________________ A Dissertation and honeycombs. However, for weight sensitive, ambient temperature applications, carbon fiber composites have emerged as a promising material due to its high specific strength and low density. Carbon fiber reinforced

  19. Wireless networks in non-ergodic multipath fading : capacity and relaying performance analysis

    E-Print Network [OSTI]

    Nebat, Yoav

    2007-01-01T23:59:59.000Z

    3 The Capacity of Wireless Networks in Non-Ergodic Multipathdiversity in wireless networks: Ef?cient protocols anddiversity in wireless networks,” IEEE Trans. Inf. Theory,

  20. Automating cross-layer diagnosis of enterprise 802.11 wireless networks

    E-Print Network [OSTI]

    Cheng, Yu-Chung

    2007-01-01T23:59:59.000Z

    2.1. The 802.11 wireless network protocols . . . . . . . .2.2. Wireless network measurements and characterizationsproblems . . . . . 2.4. Wireless network diagnosis

  1. Enabling rich applications and reliable data collection in embedded wireless networks with low-footprint devices

    E-Print Network [OSTI]

    Mukhopadhyay, Shoubhik

    2009-01-01T23:59:59.000Z

    Data Reliability in Wireless Sensor Networks . . . . . . .in Wireless Sensor Networks . . . . . . . . . . . . 3.2.1Network of enhanced wireless LAN with additional processing

  2. Robust Cubic-Based 3-D Localization for Wireless Sensor Networks

    E-Print Network [OSTI]

    Shwe, Hnin Y; Wang, Chenchao; Chong, Peter Han Joo; Kumar, Arun

    2013-01-01T23:59:59.000Z

    tion for Mobile Wireless Sensor Networks,” Ad Hoc Net-tion for Mobile Wireless Sensor Networks,” Ad Hoc Net-Scheme in Stereo Wireless Sensor Networks,” Advances in

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

    E-Print Network [OSTI]

    Xue, Xin

    2009-01-01T23:59:59.000Z

    On the application of wireless sensor networks in conditionLewis, "Energy-efficient wireless sensor network design andin dense wireless sensor networks," in Proceedings of the

  4. Fiber optic geophysical sensors

    DOE Patents [OSTI]

    Homuth, E.F.

    1991-03-19T23:59:59.000Z

    A fiber optic geophysical sensor is described in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects. 2 figures.

  5. Dark Fiber Testbed

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContract Management Fermi SitePARTOfficeOctoberDaniel Wood Dark Fiber Testbed

  6. CFTF | Carbon Fiber Technology Facility | ORNL

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

    BTRIC CNMS CSMB CFTF Working with CFTF HFIR MDF NTRC OLCF SNS Carbon Fiber Technology Facility Home | User Facilities | CFTF CFTF | Carbon Fiber Technology Facility SHARE Oak...

  7. Wireless Industrial Monitoring and Control using a Smart Sensor Platform

    E-Print Network [OSTI]

    California at Los Angeles, University of

    . Prabhu and Rajit Gadh Wireless Internet for the Mobile Enterprise Consortium University of California

  8. Cross-layer design optimizations in wireless protocol stacks

    E-Print Network [OSTI]

    Iyer, Sridhar

    of memory, processing power, battery life and the variations in the wireless network. The variations

  9. Student MAC Wireless Setup Guide Page 1 of 3

    E-Print Network [OSTI]

    authentication occurs for an account with Administrator rights. Step 5. The student-curtin wireless network to the Curtin Wireless network: Wireless network names There are two wireless networks operating at Curtin University. One is available for staff and the other for students. When you configure your network connection

  10. Staff MAC Wireless Setup Guide Page 1 of 3

    E-Print Network [OSTI]

    for an account with Administrator rights. Step 5. The staff-curtin wireless network is now connected as indicated to the Curtin Wireless network: Wireless network names There are two wireless networks operating at Curtin University. One is available for staff and the other for students. When you configure your network connection

  11. Behavior Profiling and Analysis in Wireless Home Networks

    E-Print Network [OSTI]

    Zhang, Junshan

    system for wireless home networks. builds a baseline profile for each computer within the home network

  12. Cross-Layer Interactions in IP Wireless Sensor Networks

    E-Print Network [OSTI]

    Ingrand, François

    for sensing applications n Environmental Sensing n low cost wireless communications n Home and building

  13. Wireless Security: Secure and Public Networks Villanova University

    E-Print Network [OSTI]

    36 Wireless Security: Secure and Public Networks Kory Kirk Villanova University Computer wireless access points. Security protocols exist for wireless networks; however, all widely implemented at implementing a protocol which allows public access to a secure wireless network have been made. In this report

  14. Wireless Network architecture for Diagnosis and Monitoring Applications

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Wireless Network architecture for Diagnosis and Monitoring Applications Zeashan Hameed Khan, Jean.Genon-Catalot@iut-valence.fr Abstract-- This paper describes a distributed wireless network architecture for remote diagnosis a wireless network architecture for tele-operation of large industrial applications. Keywords- Wireless

  15. The Effect of Caching in Sustainability of Large Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    The Effect of Caching in Sustainability of Large Wireless Networks Georgios S. Paschos Informatics the scalability and the efficiency for the future networks. In this landscape, wireless networks are considered]. Despite their worldwide deployment, wireless networks are mostly confined tof wireless networks is limited

  16. Disaster Recovery in Wireless Networks: A Homology-Based Algorithm

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Disaster Recovery in Wireless Networks: A Homology-Based Algorithm A. Vergne, I. Flint, L of wireless networks after a disaster. Considering a damaged wireless network, presenting coverage holes or cover problem. I. INTRODUCTION Wireless networks are present everywhere, must it be sensor networks

  17. Wireless Social Community Networks: A Game-Theoretic Analysis

    E-Print Network [OSTI]

    Marbach, Peter

    Wireless Social Community Networks: A Game-Theoretic Analysis Mohammad Hossein Manshaei, Julien: marbach@cs.toronto.edu Abstract--Wireless social community networks have been cre- ated as an alternative to cellular wireless networks to provide wireless data access in urban areas. By relying on access points

  18. Energy-efficient wireless networking for multimedia applications

    E-Print Network [OSTI]

    Havinga, Paul J.M.

    Energy-efficient wireless networking for multimedia applications (Wireless Communications ­ In this paper we identify the most prominent problems of wireless multimedia networking and present several state-of-the-art solutions with a focus on energy efficiency. Three key problems in networked wireless

  19. Homology based algorithm for disaster recovery in wireless networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Homology based algorithm for disaster recovery in wireless networks A. Vergne, I. Flint, L for disaster recovery of wireless networks. We consider a damaged wireless network presenting coverage holes the performances between each other and with known methods. I. INTRODUCTION Wireless networks are present

  20. UCIT Data Network Standards Campus Wireless Network Standard

    E-Print Network [OSTI]

    Habib, Ayman

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

  1. CTA: a Collaborative Tracking Algorithm in Wireless Sensor Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    CTA: a Collaborative Tracking Algorithm in Wireless Sensor Networks Ibtissem Boulanouar, Stéphane. A Wireless Sensor Network (WSN) consists of a set of Wireless Sensors which can harvest, process and share flows. Thus, we observe the emergence of Wireless Multimedia Sensor Networks (WMSN). These WMSN offer

  2. Algorithms For Wireless Sensor Networks Sartaj Sahni and Xiaochun Xu

    E-Print Network [OSTI]

    Sahni, Sartaj K.

    Algorithms For Wireless Sensor Networks Sartaj Sahni and Xiaochun Xu Department of Computer for wireless sensor networks. We focus on sensor deployment and coverage, routing and sensor fusion. Keywords: Wireless sensor networks, algorithms, routing, coverage, fusion. 1 Introduction A wireless sensor network

  3. Wireless Sensor Network Energy Conversation Nathan A. Menhorn

    E-Print Network [OSTI]

    Wireless Sensor Network Energy Conversation Techniques Nathan A. Menhorn October 20, 2005 #12;Contents 1 Introduction to Wireless Sensor Networks 3 1.1 General Overview A Wireless Sensor Network Glossary 68 2 #12;Chapter 1 Introduction to Wireless Sensor Networks 1.1 General

  4. Performance of Wireless Sensor Networks Under Random Node Failures

    E-Print Network [OSTI]

    Hagberg, Aric

    Performance of Wireless Sensor Networks Under Random Node Failures Milan Bradonji´c Bell range wireless sensor network applications with sensors distributed in the field using decentralized distribution. RGGs have been a standard tool to model and study wireless ad-hoc and wireless sensor networks [4

  5. Wireless Network Capacity Management: A Real Options Approach

    E-Print Network [OSTI]

    Forsyth, Peter A.

    .R. Vetzal May 10, 2004 Abstract This paper applies financial option valuation methods to new wireless

  6. Minimum Energy Accumulative Routing in Wireless Networks

    E-Print Network [OSTI]

    Sundaram, Ravi

    Minimum Energy Accumulative Routing in Wireless Networks Jiangzhuo Chen, Lujun Jia, Xin Liu to address the energy efficient routing problem in multi-hop wireless networks with accumulative relay. In the accumulative relay model, partially overheard signals of previous transmis- sions for the same packet are used

  7. Fractional Power Control for Decentralized Wireless Networks

    E-Print Network [OSTI]

    Jindal, Nihar

    1 Fractional Power Control for Decentralized Wireless Networks Nihar Jindal, Steven Weber, Jeffrey G. Andrews Abstract We propose and analyze a new paradigm for power control in decentralized wireless networks, termed fractional power control. Transmission power is chosen as the current channel

  8. Distributed Power Control Algorithms for Wireless Networks

    E-Print Network [OSTI]

    Bertsekas, Dimitri

    Distributed Power Control Algorithms for Wireless Networks Cynara C. Wu Dimitri P. Bertsekas cynara Cambridge, MA 02139, USA Abstract Power control has been shown to be an e ective way to increase capacity in wireless systems. In previous work on power control, it has been assumed that power levels can be assigned

  9. Detecting Phantom Nodes in Wireless Sensor Networks

    E-Print Network [OSTI]

    Kim, Dae-Shik

    Detecting Phantom Nodes in Wireless Sensor Networks Joengmin Hwang, Tian He and Yongdae Kim With thousands of tiny devices, Wireless Sensor Networks (WSNs) can support ubiquitous surveillance with a very number of phantom nodes. Key words: Sensor networks, localization, secure localization, location

  10. Optimal Power Management in Wireless Control Systems

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    Optimal Power Management in Wireless Control Systems Konstantinos Gatsis, Student Member, IEEE to the controller over a wireless fading channel. The power allocated to these transmissions determines state. The goal is to design plant input and transmit power policies that minimize an infinite horizon

  11. SECURITY FOR WIRELESS NETWORKS AND DEVICES

    E-Print Network [OSTI]

    connections. Users of handheld devices such as personal digital assis tants (PDAs) and cell phones can synMarch 2003 SECURITY FOR WIRELESS NETWORKS AND DEVICES Shirley Radack, Editor, Computer Security organizations and users have found that wireless communications and devices are convenient, flexible, and easy

  12. Manual authentication for wireless devices Christian Gehrmann

    E-Print Network [OSTI]

    Mitchell, Chris

    is to examine how these services might best be achieved for personal wireless-enabled devices. Using the terminology of Stajano [12], the problem is that of securely `imprinting' a personal device. That is, suppose a user has two wireless-enabled devices, e.g. a mobile phone and a Personal Digital Assistant (PDA

  13. Monitoring Energy Consumption In Wireless Sensor Networks

    E-Print Network [OSTI]

    Turau, Volker

    Monitoring Energy Consumption In Wireless Sensor Networks Matthias Witt, Christoph Weyer, it may impair the ability of the sensor network to function. Therefore, minimizing energy consumption energy consumption in both standby and active modes is the basis of wireless networks. Energy preserving

  14. Fiber Laser Based Nonlinear Spectroscopy

    E-Print Network [OSTI]

    Adany, Peter

    2012-08-31T23:59:59.000Z

    Figure 31. Varied output spectrum of NL-PM-750 (spectrograms) .................................72 Figure 32. Comparison of four dispersion profiles. ..........................................................75 Figure 33. Simulations of four dispersion... characteristics of three photonic crystal fibers. 82 Figure 39. Simulation of NL-PM-750............................................................................... 83 Figure 40. Varying the input wavelength in NL-PM-750 fiber...

  15. Buried fiber optic intrusion sensor

    E-Print Network [OSTI]

    Maier, Eric William

    2004-09-30T23:59:59.000Z

    to the buried sensor induces a phase shift in light propagating along the fiber which allows for the detection and localization of intrusions. Through the use of an ultra-stable erbium-doped fiber laser and phase sensitive optical time domain reflectometry...

  16. Fiber Grating Environmental Sensing System

    DOE Patents [OSTI]

    Schulz, Whitten L. (Fairview, OR); Udd, Eric (Fairview, OR)

    2003-07-29T23:59:59.000Z

    Fiber grating environmental measurement systems are comprised of sensors that are configured to respond to changes in moisture or chemical content of the surrounding medium through the action of coatings and plates inducing strain that is measured. These sensors can also be used to monitor the interior of bonds for degradation due to aging, cracking, or chemical attack. Means to multiplex these sensors at high speed and with high sensitivity can be accomplished by using spectral filters placed to correspond to each fiber grating environmental sensor. By forming networks of spectral elements and using wavelength division multiplexing arrays of fiber grating sensors may be processed in a single fiber line allowing distributed high sensitivity, high bandwidth fiber optic grating environmental sensor systems to be realized.

  17. CSP 545: Wireless Networking Technologies and Applications Yi-Bing Lin, Imrich Chlamtac, Wireless and Mobile Network Architectures.

    E-Print Network [OSTI]

    Heller, Barbara

    CSP 545: Wireless Networking Technologies and Applications Texts Yi-Bing Lin, Imrich Chlamtac, Wireless and Mobile Network Architectures. Reference: Theodore S. Rappaport, Theodore Rappaport, Wireless local area network technologies including 802.11b (wireless Ethernet) and Bluetooth, and third

  18. Abstract--Wireless Sensor Network (WSN) is an emerging special type of ad-hoc wireless networks technology. It is

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Abstract-- Wireless Sensor Network (WSN) is an emerging special type of ad-hoc wireless networks the needs for special type of applications where Wireless Sensor Networks (WSN) can play an important role that differentiate it from other types of wireless networks. These differences raise new challenges to be overcome

  19. Commercial Mobile Alerting System (CMAS) CMAS is the system interface to the Wireless Emergency Alerts (WEA) service that wireless carriers

    E-Print Network [OSTI]

    Meyers, Steven D.

    is a partnership between FEMA, the Federal Communications Commission (FCC), and wireless carriers, to enhance

  20. COMPRESSIVE LINEAR NETWORK CODING FOR EFFICIENT DATA COLLECTION IN WIRELESS SENSOR NETWORKS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    COMPRESSIVE LINEAR NETWORK CODING FOR EFFICIENT DATA COLLECTION IN WIRELESS SENSOR NETWORKS fields, Wireless Sensor Networks Index Terms-- Belief Propagation, Network Coding, Fi- nite fields, Wireless Sensor Networks 1. INTRODUCTION A Wireless Sensor Network (WSN) consists of spatially dis

  1. Apparatus and method for combining light from two or more fibers into a single fiber

    DOE Patents [OSTI]

    Klingsporn, Paul Edward

    2007-02-20T23:59:59.000Z

    An apparatus and method for combining light signals carried on a plurality of input fibers onto a single receiving fiber with a high degree of efficiency. The apparatus broadly comprises the receiving fiber and a plurality of input fiber-lens assemblies, with each fiber lens assembly including an input fiber; a collimating lens interposed between the input fiber and the receiving fiber and adapted to collimate the light signal; and a focusing lens interposed between the collimating lens and the receiving fiber and adapted to focus the collimated light signal onto the face of the receiving fiber. The components of each fiber-lens assembly are oriented along an optic axis that is inclined relative to the receiving fiber, with the inclination angle depending at least in part on the input fiber's numerical aperture and the focal lengths and diameters of the collimating and focusing lenses.

  2. Apparatus and method for combining light from two or more fibers into a single fiber

    SciTech Connect (OSTI)

    Klingsporn, Paul Edward

    2006-03-14T23:59:59.000Z

    An apparatus and method for combining light signals carried on a plurality of input fibers onto a single receiving fiber with a high degree of efficiency. The apparatus broadly comprises the receiving fiber and a plurality of input fiber-lens assemblies, with each fiber lens assembly including an input fiber; a collimating lens interposed between the input fiber and the receiving fiber and adapted to collimate the light signal; and a focusing lens interposed between the collimating lens and the receiving fiber and adapted to focus the collimated light signal onto the face of the receiving fiber. The components of each fiber-lens assembly are oriented along an optic axis that is inclined relative to the receiving fiber, with the inclination angle depending at least in part on the input fiber's numerical aperture and the focal lengths and diameters of the collimating and focusing lenses.

  3. High performance fibers. Final report

    SciTech Connect (OSTI)

    Economy, J.

    1994-01-01T23:59:59.000Z

    A two and a half year ONR/ARPA funded program to develop a low cost process for manufacture of a high strength/high modulus sigma/E boron nitride (BN) fiber was initiated on 7/1/90 and ended on 12/31/92. The preparation of high sigma/E BN fibers had been demonstrated in the late 1960's by the PI using a batch nitriding of B2O3 fiber with NH3 followed by stress graphitization at approx. 2000 deg C. Such fibers displayed values comparable to PAN based carbon fibers but the mechanicals were variable most likely because of redeposition of volatiles at 2000 deg C. In addition, the cost of the fibers was very high due to the need for many hours of nitriding necessary to convert the B2O3 fibers. The use of batch nitriding negated two possible cost advantages of this concept, namely, the ease of drawing very fine, multi-filament yarn of B2O3 and more importantly the very low cost of the starting materials.

  4. Infrared Fiber Optics James A. Harrington

    E-Print Network [OSTI]

    1 Infrared Fiber Optics James A. Harrington Ceramic & Materials Engineering Rutgers University Piscataway, NJ 08854-8065 1. Introduction Infrared (IR) optical fibers may be defined as fiber optics IR fiber optics may logically be divided into three broad categories: glass, crystalline, and hollow

  5. Optical fiber reliability models M. John Matthewson

    E-Print Network [OSTI]

    Matthewson, M. John

    3 Optical fiber reliability models M. John Matthewson Fiber Optic Materials Research Program Systems containing optical fiber have design lives on the order of decades so that models for assessing and promising areas for future work are proposed. 1. INTRODUCTION Mechanical failure of optical fiber must

  6. Ethanol extraction of phytosterols from corn fiber

    DOE Patents [OSTI]

    Abbas, Charles (Champaign, IL); Beery, Kyle E. (Decatur, IL); Binder, Thomas P. (Decatur, IL); Rammelsberg, Anne M. (Decatur, IL)

    2010-11-16T23:59:59.000Z

    The present invention provides a process for extracting sterols from a high solids, thermochemically hydrolyzed corn fiber using ethanol as the extractant. The process includes obtaining a corn fiber slurry having a moisture content from about 20 weight percent to about 50 weight percent solids (high solids content), thermochemically processing the corn fiber slurry having high solids content of 20 to 50% to produce a hydrolyzed corn fiber slurry, dewatering the hydrolyzed corn fiber slurry to achieve a residual corn fiber having a moisture content from about 30 to 80 weight percent solids, washing the residual corn fiber, dewatering the washed, hydrolyzed corn fiber slurry to achieve a residual corn fiber having a moisture content from about 30 to 80 weight percent solids, and extracting the residual corn fiber with ethanol and separating at least one sterol.

  7. System and method for time synchronization in a wireless network

    DOE Patents [OSTI]

    Gonia, Patrick S. (Maplewood, MN); Kolavennu, Soumitri N. (Blaine, MN); Mahasenan, Arun V. (Kerala, IN); Budampati, Ramakrishna S. (Maple Grove, MN)

    2010-03-30T23:59:59.000Z

    A system includes multiple wireless nodes forming a cluster in a wireless network, where each wireless node is configured to communicate and exchange data wirelessly based on a clock. One of the wireless nodes is configured to operate as a cluster master. Each of the other wireless nodes is configured to (i) receive time synchronization information from a parent node, (ii) adjust its clock based on the received time synchronization information, and (iii) broadcast time synchronization information based on the time synchronization information received by that wireless node. The time synchronization information received by each of the other wireless nodes is based on time synchronization information provided by the cluster master so that the other wireless nodes substantially synchronize their clocks with the clock of the cluster master.

  8. Fiber felts as low density structural materials

    SciTech Connect (OSTI)

    Milewski, J.V.; Newfield, S.E.

    1981-01-01T23:59:59.000Z

    Short fiber felts structures can be made which provide improvements in properties over foams. In applications where resistance to compression set or stress relaxation are important, bonded fiber felts excel due to the flexing of individual fibers within their elastic limit. Felts of stainless steel and polyester fibers were prepared by deposition from liquid slurries. Compressive properties were determined as a function of felt parent material, extent of bonding, felt density, and length-to-diameter (L/D) ratio of starting fibers.

  9. Scintillator fiber optic long counter

    DOE Patents [OSTI]

    McCollum, T.; Spector, G.B.

    1994-03-29T23:59:59.000Z

    A flat response position sensitive neutron detector capable of providing neutron spectroscopic data utilizing scintillator fiber optic filaments embedded in a neutron moderating housing having an open end through which neutrons enter to be detected is described. 11 figures.

  10. Mobile fiber optic emission spectrograph

    SciTech Connect (OSTI)

    Spencer, W.A.; Coleman, C.J.; McCarty, J.E.; Beck, R.S.

    1997-05-01T23:59:59.000Z

    Technical Assistance Request HLW/DWPF-TAR-970064 asked SRTC to evaluate the use of a fiber optic coupled emission spectrometer. The spectrometer would provide additional ICP analyses in the DWPF laboratory.

  11. Low Cost Carbon Fiber Overview

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

    UT-Battelle for the U.S. Department of Energy Presentationname CARBON FIBER OVERVIEW Materials LM002 Task FY 2010 Budget Industry Cost Share FY 2011 Budget Industry Cost Share...

  12. LongviewCowlitzFiberCX

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

    new ground disturbance. To accommodate the additional weight of the fiber cable on the transmission line, BPA would need to rebuild eight towers to a higher pole class: 110, 2...

  13. Buried fiber optic intrusion sensor 

    E-Print Network [OSTI]

    Maier, Eric William

    2004-09-30T23:59:59.000Z

    A distributed fiber optic intrusion sensor capable of detecting intruders from the pressure of their weight on the earth's surface was investigated in the laboratory and in field tests. The presence of an intruder above or in proximity...

  14. High repetition rate fiber lasers

    E-Print Network [OSTI]

    Chen, Jian, Ph. D. Massachusetts Institute of Technology

    2009-01-01T23:59:59.000Z

    This thesis reports work in high repetition rate femtosecond fiber lasers. Driven by the applications including optical arbitrary waveform generation, high speed optical sampling, frequency metrology, and timing and frequency ...

  15. Lower Cost Carbon Fiber Precursors

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

    1 Lower Cost Carbon Fiber Precursors P.I. Name: Dave Warren Presenter: Dr. Amit K. Naskar Oak Ridge National Laboratory 05162012 Project ID LM004 This presentation does not...

  16. Distributed Connectivity of Wireless Networks

    E-Print Network [OSTI]

    Halldorsson, Magnus M

    2012-01-01T23:59:59.000Z

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

  17. History of wireless power transmission

    SciTech Connect (OSTI)

    Brown, W.C. [Microwave Power Transmission Systems, Weston, MA (United States)] [Microwave Power Transmission Systems, Weston, MA (United States)

    1996-12-31T23:59:59.000Z

    The history of wireless power transmission at microwave frequencies is reviewed with emphasis upon the time period starting with the post World War II efforts to use the new microwave technology developed during the war. A nationally televised demonstration of a microwave powered helicopter at the Spencer Laboratory of the Raytheon Co., in 1964 was the result of these early efforts and broadly introduced the concept of wireless power transmission to scientific and engineering communities and to the public. Subsequent development efforts centered on improving the efficiency of the interconversion of d.c. and microwave power at the ends of the system to reach a demonstrated overall d.c. to d.c. system efficiency of 54% in 1974. The response to the requirements of applications such as the Solar Power Satellite and high altitude microwave powered aircraft have changed the direction of technology development and greatly expanded the technology base. Recent and current efforts are centered on examining the use of higher frequencies than the baseline 2.45 GHz, and in reducing the system costs at 2.45 GHz. 26 refs., 14 figs.

  18. Optical fiber sensor having a sol-gel fiber core and a method of making

    DOE Patents [OSTI]

    Tao, Shiquan; Jindal, Rajeev; Winstead, Christopher; Singh, Jagdish P.

    2006-06-06T23:59:59.000Z

    A simple, economic wet chemical procedure is described for making sol-gel fibers. The sol-gel fibers made from this process are transparent to ultraviolet, visible and near infrared light. Light can be guided in these fibers by using an organic polymer as a fiber cladding. Alternatively, air can be used as a low refractive index medium. The sol-gel fibers have a micro pore structure which allows molecules to diffuse into the fiber core from the surrounding environment. Chemical and biochemical reagents can be doped into the fiber core. The sol-gel fiber can be used as a transducer for constructing an optical fiber sensor. The optical fiber sensor having an active sol-gel fiber core is more sensitive than conventional evanescent wave absorption based optical fiber sensors.

  19. IEEE 802.11ah: Advantages in Standards and Further Challenges for Sub 1 GHz Wi-Fi

    E-Print Network [OSTI]

    Langendoen, Koen

    -Fi, smart grid, IoT, M2M. I. INTRODUCTION It is widely accepted that the dominant indoor (wireless) network phones, thus increasing the competition for unlicensed wireless access in the ISM band. Smart grid to highly congested wireless access systems. In addition, the deployment of wireless smart meter devices

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

    DOE Patents [OSTI]

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

    2011-12-13T23:59:59.000Z

    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.

  1. anchored carbon fiber: Topics by E-print Network

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

    material. It is important that a carbon fiber manufacturing cost model 4 Carbon Fiber Composite Cellular A Dissertation Materials Science Websites Summary: Carbon Fiber Composite...

  2. Efficient wireless charging with gallium nitride FETs

    E-Print Network [OSTI]

    Yeh, Theresa (Theresa I.)

    2014-01-01T23:59:59.000Z

    Though wireless charging is more convenient than traditional wired charging methods, it is currently less efficient. This not only wastes power but can also result in a longer charging time. Improving the efficiency of ...

  3. Virtual infrastructure for wireless ad hoc networks

    E-Print Network [OSTI]

    Gilbert, Seth, 1976-

    2007-01-01T23:59:59.000Z

    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 ...

  4. Interference management in wireless cellular networks 

    E-Print Network [OSTI]

    Burchardt, Harald Peter

    2013-07-01T23:59:59.000Z

    In wireless networks, there is an ever-increasing demand for higher system throughputs, along with growing expectation for all users to be available to multimedia and Internet services. This is especially difficult to ...

  5. Epidemic Propagation In Overlaid Wireless Networks

    SciTech Connect (OSTI)

    Yanmaz, Evsen [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    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.

  6. Wireless, automated monitoring for potential landslide hazards 

    E-Print Network [OSTI]

    Garich, Evan Andrew

    2007-09-17T23:59:59.000Z

    . Commercially available soil moisture probes and soil tilt sensors were combined with low-power, wireless data transmitters to form a self-configuring network of soil monitoring sensors. The remote locations of many slope stability hazard sites eliminates...

  7. 3D face recognition with wireless transportation 

    E-Print Network [OSTI]

    Zou, Le

    2009-05-15T23:59:59.000Z

    , we consider the wireless transportation problem of range images, which are captured by scattered sensor nodes from target objects and are forwarded to the core components (i.e., feature extraction and classi?cation components) of the face recognition...

  8. Transmission Power Management for Wireless Health Applications

    E-Print Network [OSTI]

    Amini, Navid

    2012-01-01T23:59:59.000Z

    channel and energy efficient topology design for wirelessChris Blondia Design of Energy Efficient Topologies forEnergy-Efficient Signal Processing in Wearable Embedded Systems: An Optimal Feature Selection Approach,” 2012 International Symposium on Low Power Electronics and Design,

  9. Iterative Collision Resolution in Wireless Networks 

    E-Print Network [OSTI]

    Stuckman, Katherine Christine

    2013-03-29T23:59:59.000Z

    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...

  10. Random access wireless networks with controlled mobility

    E-Print Network [OSTI]

    Modiano, Eytan H.

    This paper considers wireless networks where messages arriving randomly (in time and space) are collected by a mobile receiver. The messages are transmitted to the mobile receiver according to a random access scheme and ...

  11. Improving wireless network performance using sensor hints

    E-Print Network [OSTI]

    Sivalingam, Lenin Ravindranath

    2010-01-01T23:59:59.000Z

    Users of wireless devices often switch between being stationary and in motion while transferring data. Protocols that perform well in the static setting (where the channel conditions are relatively stable), however, tend ...

  12. 3D face recognition with wireless transportation

    E-Print Network [OSTI]

    Zou, Le

    2009-05-15T23:59:59.000Z

    , we consider the wireless transportation problem of range images, which are captured by scattered sensor nodes from target objects and are forwarded to the core components (i.e., feature extraction and classi?cation components) of the face recognition...

  13. Distributed MIMO for wireless sensor networks 

    E-Print Network [OSTI]

    Wen, Xiaojun

    2011-11-22T23:59:59.000Z

    Over the past decade, wireless sensor networks have gained more research attention for their potential applications in healthcare, defense, environmental monitoring, etc. Due to the strict energy limitation in the sensor ...

  14. Robust Clock Synchronization in Wireless Sensor Networks

    E-Print Network [OSTI]

    Saibua, Sawin

    2010-10-12T23:59:59.000Z

    Clock synchronization between any two nodes in a Wireless Sensor Network (WSNs) is generally accomplished through exchanging messages and adjusting clock offset and skew parameters of each node’s clock. To cope with unknown network message delays...

  15. Acoustical Communications for Wireless Downhole Telemetry Systems

    E-Print Network [OSTI]

    Farraj, Abdallah

    2012-08-22T23:59:59.000Z

    This dissertation investigates the use of advanced acoustical communication techniques for wireless downhole telemetry systems. Using acoustic waves for downhole telemetry systems is investigated in order to replace the wired communication systems...

  16. Energy Management in Wireless Sensor Network Operations 

    E-Print Network [OSTI]

    Mohapatra, Arupa Kumar

    2013-07-26T23:59:59.000Z

    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...

  17. Optical fiber inspection system

    DOE Patents [OSTI]

    Moore, F.W.

    1985-04-05T23:59:59.000Z

    A remote optical inspection system including an inspection head. The inspection head has a passageway through which pellets or other objects are passed. A window is provided along the passageway through which light is beamed against the objects being inspected. A plurality of lens assemblies are arranged about the window so that reflected light can be gathered and transferred to a plurality of coherent optical fiber light guides. The light guides transfer the light images to a television or other image transducer which converts the optical images into a representative electronic signal. The electronic signal can then be displayed on a signal viewer such as a television monitor for inspection by a person. A staging means can be used to support the objects for viewing through the window. Routing means can be used to direct inspected objects into appropriate exit passages for accepted or rejected objects. The inspected objects are advantageously fed in a singular manner to the staging means and routing means. The inspection system is advantageously used in an enclosure when toxic or hazardous materials are being inspected. 10 figs.

  18. Ceramic composites: Roles of fiber and interface

    SciTech Connect (OSTI)

    Singh, J.P.; Singh, D. [Argonne National Lab., IL (United States). Energy Technology Div.

    1997-09-01T23:59:59.000Z

    Results are presented that elucidate (a) the effects of fiber coating on retained fiber strength and mechanical properties of Nicalon-fiber-reinforced SiC matrix composites, and (b) the role of residual stresses in the interfacial bond strength of SiC-fiber-reinforced reaction-bonded Si{sub 3}N{sub 4} matrix composites. For Nicalon-fiber-reinforced SiC matrix composites that were fractured in a flexural mode, retained in-situ fiber strength, ultimate strength, and work-of-fracture (WOF) of the composites increased with increasing thickness of the fiber coating and reached maximum values at a coating thickness of {approx} 0.3 {micro}m. A direct correlation between the variation of in-situ fiber strength and the variation of ultimate strength and WOF of the composites clearly indicates the critical role of the retained in-situ strength of reinforcing fibers in composites. Fiber pushout tests performed on SiC-fiber-reinforced reaction-bonded Si{sub 3}N{sub 4} matrix composites indicate that both debonding and frictional shear stresses decreased with increasing fiber content. These variations are consistent with the variation of residual radial stress on fibers, as measured by neutron diffraction, i.e., residual stresses decreased with increasing fiber content. Because fracture behavior is strongly controlled by interfacial bond strength, which is proportional to the residual radial stress, appropriate control of residual stress is critical in the design of composites with desired fracture properties.

  19. AeroLab Wireless Network Code of Conduct The AeroLab wireless network is intended for academic use only. Any use of the

    E-Print Network [OSTI]

    Sislian, J. P.

    AeroLab Wireless Network Code of Conduct The AeroLab wireless network is intended for academic use only. Any use of the wireless network for BitTorrent or other Peer-to-Peer file sharing is strictly will have their wireless access privileges revoked. Connecting to the AeroLab Wireless Network This document

  20. Copyrighted (Textbook) Fei Hu and Xiaojun Cao, Wireless Sensor Networks: Principles and Practice, CRC Press Page 1 Chapter 4: Routing in Wireless Sensor

    E-Print Network [OSTI]

    Hu, Fei

    Copyrighted (Textbook) Fei Hu and Xiaojun Cao, Wireless Sensor Networks: Principles and Practice, CRC Press Page 1 Chapter 4: Routing in Wireless Sensor Networks 4.1 Introduction to Routing in Wireless Sensor Networks Wireless Sensor Networks (WSNs) is a distributed wireless ad-hoc network

  1. New and Emerging Energy Efficient Wireless Protocols New and Emerging Energy Efficient Wireless

    E-Print Network [OSTI]

    Jain, Raj

    New and Emerging Energy Efficient Wireless Protocols 1 of 12 New and Emerging Energy Efficient energy efficient wireless protocols. The benefits of each protocol are given, and then the different ways of conserving energy are compared. Key Words- Energy efficient protocols, energy efficiency, energy aware, low

  2. GNU Radio & USRPGNU Radio & USRP File transfer through WirelessFile transfer through Wireless

    E-Print Network [OSTI]

    Yu, Chansu

    1 GNU Radio & USRPGNU Radio & USRP File transfer through WirelessFile transfer through WirelessSachin Hirve April 30, 2008April 30, 2008 Contents:Contents: What is Software Radio?What is Software Radio? USRPUSRP ­­ MultiMulti--functional hardwarefunctional hardware GNU RadioGNU Radio Previous Work

  3. Carbon nanotube fiber spun from wetted ribbon

    DOE Patents [OSTI]

    Zhu, Yuntian T; Arendt, Paul; Zhang, Xiefei; Li, Qingwen; Fu, Lei; Zheng, Lianxi

    2014-04-29T23:59:59.000Z

    A fiber of carbon nanotubes was prepared by a wet-spinning method involving drawing carbon nanotubes away from a substantially aligned, supported array of carbon nanotubes to form a ribbon, wetting the ribbon with a liquid, and spinning a fiber from the wetted ribbon. The liquid can be a polymer solution and after forming the fiber, the polymer can be cured. The resulting fiber has a higher tensile strength and higher conductivity compared to dry-spun fibers and to wet-spun fibers prepared by other methods.

  4. Low Frequency Wireless Communications Technology

    SciTech Connect (OSTI)

    Bartone, Erik J; Carbone, John F

    2004-01-27T23:59:59.000Z

    The purpose of this project was to demonstrate Nxegen's real-time wireless electricity monitoring and load management technologies in selected commercial, industrial, and municipal end user facilities. The purpose of which is to demonstrate the ability for Nxegen's technology to collect real-time electricity data to a central location (Nxegen's Network Operation Center "NOC"), aggregate customer load profiles into portfolios of profiles, and be able to dispatch load curtailment commands from the NOC to individual customer loads to demonstrate the ability to integrate demand resources into the overall electric utility system for the purpose of; (1) improving overall system reliability, (2) reducing wholesale electric generation prices (locational marginal prices "LMP"), and (3) reducing congestion costs in energy constrained areas (southwest Connecticut).

  5. Dynamic channel allocation in satellite and wireless networks

    E-Print Network [OSTI]

    Sun, Jun, 1975-

    2007-01-01T23:59:59.000Z

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

  6. Design & implementation of a wireless sensor prototyping kit

    E-Print Network [OSTI]

    Hope, Jamison Roger

    2005-01-01T23:59:59.000Z

    In recent years, wireless sensor networks (WSN) has become an active area of research among computer scientists. In this work, JONA, a prototyping kit for wireless sensors, will be described. The intention of this kit is ...

  7. Power Management Mechanism Exploiting Network and Video Information over Wireless

    E-Print Network [OSTI]

    Bouras, Christos

    Power Management Mechanism Exploiting Network and Video Information over Wireless Links Christos information from higher network layers may be utilized for more efficient power management in wireless- tune transmission power according to information received from the transport (feedback reports from

  8. An overview of wireless structural health monitoring for civil structures

    E-Print Network [OSTI]

    Lynch, Jerome P.

    An overview of wireless structural health monitoring for civil structures BY JEROME PETER LYNCH health monitoring systems that interrogate structural data for signs of damage. After the hardware computing; wireless telemetry; structural health monitoring 1. Introduction Society's built environment

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

    E-Print Network [OSTI]

    Hoelscher, David Louis

    2009-05-15T23:59:59.000Z

    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...

  10. Airblue: A System for Cross-Layer Wireless Protocol Development

    E-Print Network [OSTI]

    Ng, Man Cheuk

    Over the past few years, researchers have developed many crosslayer wireless protocols to improve the performance of wireless networks. Experimental evaluations of these protocols have been carried out mostly using ...

  11. An energy efficient RF transceiver for wireless microsensor networks

    E-Print Network [OSTI]

    Daly, Denis Clarke

    2005-01-01T23:59:59.000Z

    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 ...

  12. A wireless, low power, asynchronous, multi-sensor, temperature network

    E-Print Network [OSTI]

    Levy, Daniel M. G. H. (Daniel Matthew Guy Ho), 1979-

    2003-01-01T23:59:59.000Z

    Wireless communication is not new. Radio and television broadcasting, as well as air traffic control have used wireless signals in their products for decades. The transmitters for these applications require large antennas ...

  13. ENERGY EFFICIENCY AND SECURITY FOR MULTIHOP WIRELESS NETWORKS

    E-Print Network [OSTI]

    Vaidya, Nitin

    ENERGY EFFICIENCY AND SECURITY FOR MULTIHOP WIRELESS NETWORKS BY MATTHEW JEFFERSON MILLER B over wireless channels demands confidentiality and integrity. In the energy efficiency domain that marginal gains in battery energy density necessitate energy efficient protocols. In the security realm

  14. Enhancing spectrum utilization through cooperation and cognition in wireless systems

    E-Print Network [OSTI]

    Rahul, Hariharan Shankar, 1975-

    2013-01-01T23:59:59.000Z

    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 ...

  15. Implementing a wireless base station for a sensor network

    E-Print Network [OSTI]

    Song, Heewon, 1977-

    2004-01-01T23:59:59.000Z

    Using wireless sensor networks for monitoring infrastructure is a new trend in civil engineering. Compared with traditional ways to monitor infrastructure, wireless sensor networks are cheap, safe, and compact. However, ...

  16. Direct Information Exchange in Wireless Networks: A Coding Perspective 

    E-Print Network [OSTI]

    Ozgul, Damla

    2011-10-21T23:59:59.000Z

    demand of mobile wireless clients forces network providers to upgrade their wireless networks with more efficient and more reliable services to meet the demands of their customers. Therefore, there is a growing interest in strategies to resolve...

  17. Computing the Capacity Region of a Wireless Network

    E-Print Network [OSTI]

    Gummadi, Ramakrishna

    We consider a wireless network of n nodes that communicate over a common wireless medium under some interference constraints. Our work is motivated by the need for an efficient and distributed algorithm to determine the ...

  18. Mobileflow: Applying SDN to Mobility in Wireless Networks 

    E-Print Network [OSTI]

    Al-Shaikhli, Raghdah

    2014-08-10T23:59:59.000Z

    Wireless technology has become an increasingly popular way for network access. Wireless networks provide efficient, reliable service; supporting a broad range of emerging applications including multimedia streaming and video conferencing. Currently...

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

    E-Print Network [OSTI]

    Gupta, Seema

    2000-01-01T23:59:59.000Z

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

  20. Efficient multi-resolution data dissemination in wireless sensor networks

    E-Print Network [OSTI]

    Chen, Jian

    2005-11-01T23:59:59.000Z

    A large-scale distributed wireless sensor network is composed of a large collection of small low-power, unattended sensing devices equipped with limited memory, processors, and short-range wireless communication. The network is capable...

  1. Topology management protocols in ad hoc wireless sensor networks

    E-Print Network [OSTI]

    Kim, Hogil

    2009-05-15T23:59:59.000Z

    A wireless sensor network (WSN) is comprised of a few hundred or thousand au-tonomous sensor nodes spatially distributed over a particular region. Each sensornode is equipped with a wireless communication device, a small microprocessor, anda battery...

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

    E-Print Network [OSTI]

    Hoelscher, David Louis

    2009-05-15T23:59:59.000Z

    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...

  3. Mobileflow: Applying SDN to Mobility in Wireless Networks

    E-Print Network [OSTI]

    Al-Shaikhli, Raghdah

    2014-08-10T23:59:59.000Z

    , there are two dominant technologies for providing wireless network access: cellular broadband networks and wireless local area networks (Wi-Fi). Cellular networks offer ubiquitous coverage, high reliability, and support mobility; yet such networks require...

  4. THE FUTURE OF THE WIRELESS ART by Nikola Tesla

    E-Print Network [OSTI]

    Cetiner, Bedri A.

    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

  5. Efficient Allocation Algorithms for Multicarrier Spread-Spectrum Schemes in UWB Applications

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    the Federal Communications Commission (FCC) agreed on the allocation of a 3.1­10.6 GHz spectrum for unlicensed attracted considerable interest in short range, high data rate wireless communications since 2002 when

  6. ADAPTIVE MULTI-CARRIER SPREAD-SPECTRUM WITH DYNAMIC TIME-

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    the Federal Communications Commission (FCC) agreed on the allocation of a 3.1­10.6 GHz spectrum for unlicensed emerged as an exciting technology for short range, high data rate wireless communications since 2002 when

  7. Graphitized-carbon fiber/carbon char fuel

    DOE Patents [OSTI]

    Cooper, John F. (Oakland, CA)

    2007-08-28T23:59:59.000Z

    A method for recovery of intact graphitic fibers from fiber/polymer composites is described. The method comprises first pyrolyzing the graphite fiber/polymer composite mixture and then separating the graphite fibers by molten salt electrochemical oxidation.

  8. advanced sic fiber: Topics by E-print Network

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

    23 24 25 Next Page Last Page Topic Index 1 Photonic Crystal Fibers Advances in Fiber Optics Physics Websites Summary: Photonic Crystal Fibers Advances in Fiber Optics Elliott L....

  9. Continuous Fiber Ceramic Composites (CFCC)

    SciTech Connect (OSTI)

    R. A. Wagner

    2002-12-18T23:59:59.000Z

    This report summarizes work to develop CFCC's for various applications in the Industries of the Future (IOF) and power generation areas. Performance requirements range from relatively modest for hot gas filters to severe for turbine combustor liners and infrared burners. The McDermott Technology Inc. (MTI) CFCC program focused on oxide/oxide composite systems because they are known to be stable in the application environments of interest. The work is broadly focused on dense and porous composite systems depending on the specific application. Dense composites were targeted at corrosion resistant components, molten aluminum handling components and gas turbine combustor liners. The development work on dense composites led to significant advances in fiber coatings for oxide fibers and matrix densification. Additionally, a one-step fabrication process was developed to produce low cost composite components. The program also supported key developments in advanced oxide fibers that resulted in an improved version of Nextel 610 fiber (commercially available as Nextel 650) and significant progress in the development of a YAG/alumina fiber. Porous composite development focused on the vacuum winding process used to produce hot gas filters and infrared burner components.

  10. Power business Turning wireless power research into a top business

    E-Print Network [OSTI]

    Auckland, University of

    to replace conventional slip rings in the turbines with its wireless technology. "The challenge with wind-generation

  11. Coded Hierarchical Modulation for Wireless Progressive Image Transmission

    E-Print Network [OSTI]

    Arslan, Suayb S; Cosman, Pamela C; Milstein, Laurence B

    2011-01-01T23:59:59.000Z

    unequal error protection in wireless relay networks,” IEEErelay networks in [16] and is shown to yield good unequal protection

  12. Traffic Management and Net Neutrality in Wireless Networks

    E-Print Network [OSTI]

    Jordan, Scott

    2011-01-01T23:59:59.000Z

    failure and that innovation in wireless devices and applications is thriving. Next they provide an economic analysis

  13. OIT Wireless Telemetry for Industrial Applications

    SciTech Connect (OSTI)

    Manges, WW

    2002-09-03T23:59:59.000Z

    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.

  14. SDJS: The Duck Hunter Problem in Wireless Sensor Networks

    E-Print Network [OSTI]

    Beigl, Michael

    SDJS: The Duck Hunter Problem in Wireless Sensor Networks Albert Krohn, Tobias Zimmer, Michael) is a new transmission scheme targeted to highly mobile and ad hoc wireless sys- tems. It is based of devices in a mobile wireless ad hoc network. This new approach can increase the speed of the estimation

  15. Power and Delay Optimization in Multi-Hop Wireless Networks

    E-Print Network [OSTI]

    Shihada, Basem

    In this paper, we study the optimization problem of transmission power and delay in a multi-hop wireless network of transmission power and queueing delay in wireless networks has1 Power and Delay Optimization in Multi-Hop Wireless Networks Li Xia, Basem Shihada Abstract

  16. Wireless Sensor Networks for Structural Health Monitoring by Sukun Kim

    E-Print Network [OSTI]

    California at Berkeley, University of

    Wireless Sensor Networks for Structural Health Monitoring by Sukun Kim Research Project Submitted James W. Demmel Second Reader (Date) #12;Wireless Sensor Networks for Structural Health Monitoring Copyright Spring 2005 by Sukun Kim #12;i Abstract Wireless Sensor Networks for Structural Health Monitoring

  17. EXPERIMENTATION AND ANALYSIS FOR UNIFIED PACKET-BASED WIRELESS NETWORKS

    E-Print Network [OSTI]

    Lockwood, John W.

    - rent state of wireless data communication, including the setup of an operating wireless testbed designed to address many of these issues. 1 Introduction The current state of wireless communications can be di- vided into two broad categories based on the designed purpose of particular devices. These two

  18. A PRIORITY-BASED ADAPTIVE SCHEME FOR WIRELESS MULTIMEDIA DELIVERY

    E-Print Network [OSTI]

    A PRIORITY-BASED ADAPTIVE SCHEME FOR WIRELESS MULTIMEDIA DELIVERY Edward Casey and Gabriel, Dublin 9, Ireland Email: {caseye, munteang}@eeng.dcu.ie ABSTRACT In wireless multimedia streaming proposes a priority-based wireless adaptive multimedia delivery scheme that enables client prioritisation

  19. Security in Wireless Data Networks: A Survey Paper

    E-Print Network [OSTI]

    Jain, Raj

    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

  20. Blacklist-Aided Forwarding in Static Multihop Wireless Networks

    E-Print Network [OSTI]

    Minnesota, University of

    Blacklist-Aided Forwarding in Static Multihop Wireless Networks Srihari Nelakuditi, Sanghwan Lee,yyu,ghlu,zhzhang}@cs.umn.edu Abstract-- Static broadband wireless networks, due to their ease of deployment, are likely to proliferate link quality fluctuations is needed for accelerating the growth of these networks. Most of the wireless

  1. Traffic-Aware Video Streaming in Broadband Wireless Networks

    E-Print Network [OSTI]

    Ansari, Nirwan

    Traffic-Aware Video Streaming in Broadband Wireless Networks Ehsan Haghani and Nirwan Ansari Shyam in the Internet. Streaming real-time video in wireless networks is a challenging problem due to the stringent video quality at the end user in wireless networks. Our solution incorporates the characteristics

  2. Robust Planning of Green Wireless Networks Grit Claen

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Robust Planning of Green Wireless Networks Grit Claßen RWTH Aachen University Lehrstuhl II f@umic.rwth-aachen.de Abstract--Current methods dealing with the energy efficient wireless network planning problem require a robust optimization model for the energy-efficient planning of wireless networks and apply cutting planes

  3. Policy 130 ver 1 Title: Management of the Wireless Network

    E-Print Network [OSTI]

    Karczmarek, Joanna

    Policy 130 ver 1 Title: Management of the Wireless Network Cover - Heading Information Table Page-President, Academic and Provost Title: Management of the Wireless Network Preamble - Background & Purposes The Problem functions and duties. The UBC wireless network, provided by UBC IT, is part of UBC's telecommunications

  4. On the Capacity of Hybrid Wireless Networks Benyuan Liu

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    On the Capacity of Hybrid Wireless Networks Benyuan Liu , Zhen Liu + , Don Towsley Department 704 Yorktown Heights, NY 10598 Abstract-- We study the throughput capacity of hybrid wireless networks stations are assumed to be connected by a high-bandwidth wired network and act as relays for wireless nodes

  5. On the Throughput Capacity of Heterogeneous Wireless Networks

    E-Print Network [OSTI]

    Latchman, Haniph A.

    On the Throughput Capacity of Heterogeneous Wireless Networks Pan Li, Member, IEEE, and Yuguang of wireless networks. However, it is commonly assumed that all nodes in the network are identical. The issue of heterogeneous wireless networks with general network settings. Specifically, we consider an extended network

  6. Percolation in multi-hop wireless networks Massimo Franceschetti1

    E-Print Network [OSTI]

    Meester, Ronald

    Percolation in multi-hop wireless networks Massimo Franceschetti1 , Lorna Booth, Matthew Cook2 of Technology, 3 Vrije Universiteit Amsterdam Abstract Models of wireless ad-hoc and sensor networks are often in practice. Keywords: wireless ad-hoc networks, continuum percolation, Boolean model, ran- dom connection

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

    E-Print Network [OSTI]

    Levy, Hanoch

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

  8. SINR Diagrams: Convexity and its Applications in Wireless Networks

    E-Print Network [OSTI]

    SINR Diagrams: Convexity and its Applications in Wireless Networks Chen Avin Yuval Emek Erez Kantor and quality of connections in a wireless network are described by physical models such as the signal the behavior of wireless networks, and may play a key role in the development of suitable algorithms

  9. On Adjusting Power to Defend Wireless Networks from Jamming

    E-Print Network [OSTI]

    Xu, Wenyuan

    1 On Adjusting Power to Defend Wireless Networks from Jamming Wenyuan Xu Department of Computer}@engr.sc.edu Abstract-- Wireless networks are susceptible to accidental or intentional radio interference. One way, we turn to examining the more complicated scenario consisting of a multi- hop wireless network. We

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

    E-Print Network [OSTI]

    Wu, Jie

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

  11. Wireless Networks in Rural Areas: Challenges and Solutions

    E-Print Network [OSTI]

    Dyer, Bill

    Wireless Networks in Rural Areas: Challenges and Solutions Shen Wan April 25, 2009 Abstract In this thesis proposal, we discuss the current limitations and chal- lenges in wireless networks, especially in rural, remote or areas with rough terrains. Although traditional wireless networking technologies have

  12. Assessment and Event Based Analysis of Dynamic Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Assessment and Event Based Analysis of Dynamic Wireless Networks Denis Carvin1,2, Guillaume Kremer1 of mobile nodes in networks is significantly changing the way they are managed. Indeed, these wireless-estimation algorithm for wireless mobile networks. We then provide events' collection and distributed mining methods

  13. Towards All-IP Wireless Networks: Architectures and Resource Management

    E-Print Network [OSTI]

    Boutaba, Raouf

    Towards All-IP Wireless Networks: Architectures and Resource Management Mechanism Majid Ghaderi-IP network integrating different wireless technologies using IP and its associated service models. The first to facilitate the integration of wireless LAN and 3G cellular networks towards a uniform architecture for all

  14. Blacklist-Aided Forwarding in Static Multihop Wireless Networks

    E-Print Network [OSTI]

    Nelakuditi, Srihari

    Blacklist-Aided Forwarding in Static Multihop Wireless Networks Srihari Nelakuditi , Sanghwan Lee,yyu,glu,zhzhangŁ @cs.umn.edu Abstract-- Static broadband wireless networks, due to their ease of deployment, are likely of the wireless routing schemes proposed in the literature are less suitable for these networks

  15. Non-Cryptographic Authentication and Identification in Wireless Networks

    E-Print Network [OSTI]

    California at Davis, University of

    1 Non-Cryptographic Authentication and Identification in Wireless Networks Kai Zeng, Kannan considered as potential alternatives/complements to provide security services in wireless networks identi- fication in wireless networks using lower/physical layer properties or information. We discuss

  16. ECN Marking for Congestion Control in Multihop Wireless Networks

    E-Print Network [OSTI]

    Siris, Vasilios A.

    ECN Marking for Congestion Control in Multihop Wireless Networks Vasilios A. Siris and Despina an approach to increase TCP's fair- ness in multihop wireless networks, using ECN as a congestion signalling demonstrate that our approach can improve TCP's fairness in a multihop wireless network compared to drop tail

  17. Monitoring Churn in Wireless Networks Stephan Holzer1

    E-Print Network [OSTI]

    Monitoring Churn in Wireless Networks Stephan Holzer1 , Yvonne Anne Pignolet2 , Jasmin Smula1 Research, Zurich Research Laboratory, Switzerland Abstract. Wireless networks often experience Wireless LAN or Bluetooth often replace large parts of wired networks since one does not have to build

  18. Video Pricing for Wireless Networks Patrick Seeling and Martin Reisslein

    E-Print Network [OSTI]

    Reisslein, Martin

    Video Pricing for Wireless Networks Patrick Seeling and Martin Reisslein Dept. of Electrical of cellular, WLAN, and multi-hop wireless networks. We illustrate the developed pricing framework through in the context of the given wireless network scenario. Our cost model incorporates fixed infrastructure costs

  19. Maximizing Throughput in Wireless Networks with Finite Internal Buffers

    E-Print Network [OSTI]

    Chang, Cheng-Shang

    Maximizing Throughput in Wireless Networks with Finite Internal Buffers Ching-Min Lien, Cheng of a discrete-time wireless network, where only certain sets of links can transmit simultaneously. It is well of the configuration vectors determines the capacity region of the wireless network. In the literature, packet

  20. What Is the Use of Collision Detection (in Wireless Networks)?

    E-Print Network [OSTI]

    What Is the Use of Collision Detection (in Wireless Networks)? Johannes Schneider1 , Roger on the task by investigating three prominent problems for wireless networks, i.e. the maximal independent set constant c. 1 Introduction When studying distributed algorithms for wireless networks, the algorithm de

  1. A Framework for the Capacity Evaluation of Multihop Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A Framework for the Capacity Evaluation of Multihop Wireless Networks Herv´e Rivano CNRS - INRIA and localized CDS. Index Terms--network capacity, multihop wireless networks, upper and lower bounds, linear programing I. INTRODUCTION Ad hoc networks are spontaneous multihop topologies of wireless nodes

  2. Securing Wireless Networks from ARP Cache Presented to

    E-Print Network [OSTI]

    Stamp, Mark

    Securing Wireless Networks from ARP Cache Poisoning A Project Presented to The Faculty _____________________________________________________________ APPROVED FOR THE UNIVERSITY #12;Roney Philip CS298 Report SJSUi ABSTRACT Securing Wireless Networks from ARP Cache Poisoning by Roney Philip Wireless networks have become an integral part of today's networks

  3. What Is the Use of Collision Detection (in Wireless Networks)?

    E-Print Network [OSTI]

    What Is the Use of Collision Detection (in Wireless Networks)? Johannes Schneider1 , Roger.g. there is energy on the channel in a wireless network. This model is called the collision detection model. Furthermore, many algorithms for wireless networks are designed for gen- eral graphs. This model does

  4. Using efficiently autoregressive estimation in Wireless Sensor Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Using efficiently autoregressive estimation in Wireless Sensor Networks Karen Miranda1 , Víctor M City {Name.Surname}@inria.fr, vicman@xanum.uam.mx Abstract--Wireless sensor networks (WSNs) are widely networks; autoregressive pro- cesses; data aggregation. I. INTRODUCTION Applications for wireless sensor

  5. Robust Target Localization from Binary Decisions in Wireless Sensor Networks

    E-Print Network [OSTI]

    Michailidis, George

    Robust Target Localization from Binary Decisions in Wireless Sensor Networks Natallia Katenka Wireless sensor networks (WSN) are becoming an important tool in a variety of tasks, including mon- itoring targets and localizing multiple targets are also considered. Keywords: wireless sensor network, target

  6. Wireless Sensor Networks: The Protocol Stack Iowa State University

    E-Print Network [OSTI]

    McCalley, James D.

    Wireless Sensor Networks: The Protocol Stack Mat Wymore Iowa State University Wind Energy Science Protocol Stack March 26, 2014 1 / 15 #12;One-Slide Refresher Wireless Sensor Networks (WSNs) Could be used;Wireless access point network Layers Application Google Chrome Transport Transmission Control Protocol (TCP

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

    E-Print Network [OSTI]

    Huang, Yinlun

    On Distributed Fault-Tolerant Detection in Wireless Sensor Networks Xuanwen Luo, Student Member problems for distributed fault-tolerant detection in wireless sensor networks: 1) how to address both it possible to perform energy- efficient fault-tolerant detection in a wireless sensor network. Index Terms

  8. Model-Driven Dynamic Control of Embedded Wireless Sensor Networks

    E-Print Network [OSTI]

    Agarwal, Pankaj K.

    Model-Driven Dynamic Control of Embedded Wireless Sensor Networks Paul G. Flikkema1 , Pankaj K-generation wireless sensor networks may revolution- ize understanding of environmental change by assimilating heteroge of wireless sensor networks is now becoming a mature research field. As a result, the discipline is undergoing

  9. SeRLoc: Robust Localization for Wireless Sensor Networks

    E-Print Network [OSTI]

    Hochberg, Michael

    SeRLoc: Robust Localization for Wireless Sensor Networks LOUKAS LAZOS and RADHA POOVENDRAN University of Washington Many distributed monitoring applications of Wireless Sensor Networks (WSNs) require of Wireless Sensor Networks to determine their location in an untrusted environment, known as the secure

  10. Data aware, Low cost Error correction for Wireless Sensor Networks

    E-Print Network [OSTI]

    California at San Diego, University of

    Data aware, Low cost Error correction for Wireless Sensor Networks Shoubhik Mukhopadhyay, Debashis challenges in adoption and deployment of wireless networked sensing applications is ensuring reliable sensor of such applications. A wireless sensor network is inherently vulnerable to different sources of unreliability

  11. An Energy Efficient Hierarchical Clustering Algorithm for Wireless Sensor Networks

    E-Print Network [OSTI]

    Chen, Ing-Ray

    An Energy Efficient Hierarchical Clustering Algorithm for Wireless Sensor Networks Seema (approximately 1 cubic millimeter) sensors. An ad-hoc wireless network of large numbers of such inexpensive, IN, USA {seema, coyle}@ecn.purdue.edu Abstract-- A wireless network consisting of a large number

  12. Energy Analysis of Four Wireless Sensor Network MAC Protocols

    E-Print Network [OSTI]

    Kinicki, Robert E.

    Energy Analysis of Four Wireless Sensor Network MAC Protocols Brian Bates, Andrew Keating, Robert-hop network topology were conducted using three wireless sensor net- work traffic patterns (broadcast which reduce radio energy consumption is important for wireless sensor networks (WSNs). The most

  13. Routing protocol for anycast communications in a wireless sensor network

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Routing protocol for anycast communications in a wireless sensor network Nancy El Rachkidy. 1 Introduction In the past few years, wireless sensor networks have been used in several moni University Complexe scientifique des C´ezeaux, 63177 Aubi`ere cedex, France Abstract. In wireless sensor

  14. Coverage Properties of the Target Area in Wireless Sensor Networks

    E-Print Network [OSTI]

    Zuyev, Sergei

    1 Coverage Properties of the Target Area in Wireless Sensor Networks Xiaoyun Li, Member, IEEE is developed for the probability of sensing coverage in a wireless sensor network with randomly deployed sensor examined. These results will have applications in planning and design tools for wireless sensor networks

  15. Finding and Mending Barrier Gaps in Wireless Sensor Networks

    E-Print Network [OSTI]

    Liu, Benyuan

    Finding and Mending Barrier Gaps in Wireless Sensor Networks Anwar Saipulla Benyuan Liu Jie Wang--Constructing sensing barriers using wireless sensor networks has important applications in military operations results show that our algorithms can effectively improve the barrier coverage of a wireless sensor network

  16. A Directionality based Location Discovery Scheme for Wireless Sensor Networks

    E-Print Network [OSTI]

    Ha, Dong S.

    A Directionality based Location Discovery Scheme for Wireless Sensor Networks Asis Nasipuri and Kai is a large ad hoc network of densely dis- tributed sensors that are equipped with low power wireless number of such wireless sensors can be networked to coordinate amongst themselves and per- form the much

  17. Wireless Sensor Network for Aircraft Health Monitoring Honeywell Labs

    E-Print Network [OSTI]

    Minnesota, University of

    Wireless Sensor Network for Aircraft Health Monitoring Haowei Bai Honeywell Labs 3660 Technology of applications. The objective of this article is to describe a wireless sensor network for monitoring of the health of aircraft engines. We describe the architec- ture of the wireless sensor network along with how

  18. Exposure In Wireless Sensor Networks: Theory And Practical Solutions

    E-Print Network [OSTI]

    Exposure In Wireless Sensor Networks: Theory And Practical Solutions Seapahn Megerian1 , Farinaz}@cs.ucla.edu, farinaz@eecs.berkeley.edu, gangqu@eng.umd.edu, gforce@ucla.edu Abstract Wireless ad-hoc sensor networks behavior of exposure and the proposed algorithm for its calculation. Keywords: wireless sensor network

  19. Wireless Sensor Networks Routing over Zones Kamal Beydoun, Violeta Felea

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Wireless Sensor Networks Routing over Zones Kamal Beydoun, Violeta Felea Laboratory of Computer univ-fcomte dot fr Abstract--In this paper, we propose a routing protocol for wireless sensor networks to determine a lower bound for the number of zones. Index Terms--wireless sensor networks, hierarchical routing

  20. Health Monitoring of Civil Infrastructures Using Wireless Sensor Networks

    E-Print Network [OSTI]

    Glaser, Steven D.

    Health Monitoring of Civil Infrastructures Using Wireless Sensor Networks Sukun Kim Shamim Pakzad of Society (CITRIS). #12;Health Monitoring of Civil Infrastructures Using Wireless Sensor Networks Sukun Kim1., 4145 N. First Street, San Jose, CA 95134 Abstract. A Wireless Sensor Network (WSN) for Structural

  1. Efficient Clustering Algorithms for Self-Organizing Wireless Sensor Networks

    E-Print Network [OSTI]

    Starobinski, David

    Efficient Clustering Algorithms for Self-Organizing Wireless Sensor Networks Rajesh Krishnan BBN@bu.edu Abstract Self-organization of wireless sensor networks, which involves network decomposi- tion-organization in wireless sensor networks. We first present a novel approach for message-efficient clustering, in which

  2. Position Estimation With Moving Beacons in Wireless Sensor Networks

    E-Print Network [OSTI]

    Dong, Liang

    Position Estimation With Moving Beacons in Wireless Sensor Networks Liang Dong and Frank L nodes in a wireless sensor network. Without GPS capability on any of the sensors, the position issue in wireless sensor networks. Accurate positions of sensor nodes improve the routing efficiency

  3. Sensor Grid: Integration of Wireless Sensor Networks and the Grid

    E-Print Network [OSTI]

    Teo, Yong-Meng

    Sensor Grid: Integration of Wireless Sensor Networks and the Grid Hock Beng Lim1 , Yong Meng Teo1 Microsystems, Inc. E-mail: [limhb, teoym]@comp.nus.edu.sg Abstract Wireless sensor networks have emerged to the sharing of sensor resources in wireless sensor networks. There are several issues and challenges

  4. A New Management Method for Wireless Sensor Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A New Management Method for Wireless Sensor Networks Aur´elien JACQUOT, Jean-Pierre CHANET, Kun.monier@anelis.isima.fr Abstract--The Wireless Sensor Networks (WSN) with their constant evolution, need new management methods, environmental data collection etc. In order to manage a large scale WSN, several Wireless sensor network

  5. ZIGBEE WIRELESS SENSOR NETWORK NODES DEPLOYMENT STRATEGY FOR

    E-Print Network [OSTI]

    ZIGBEE WIRELESS SENSOR NETWORK NODES DEPLOYMENT STRATEGY FOR DIGITAL AGRICULTURAL DATA ACQUISITIONBee-based wireless sensor network for digital agricultural data acquisition is one of the best ways to build the system. In this paper, based on ZigBee wireless sensor network deployment planning principles

  6. A Dynamic Clustering Construction for Wireless Sensor Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 A Dynamic Clustering Construction for Wireless Sensor Networks Eugene Pamba Capo-Chichi , David and reduced costs have encouraged the use of wireless sensor networks in many applications. Advances of a well known clustering algorithm for wireless sensor networks named LEACH and its versions such as LEACH

  7. A realistic testing of a shipboard wireless sensor network

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A realistic testing of a shipboard wireless sensor network H. Kdouh1,* , C. Brousseau2 , G. Zaharia-mail : hussein.kdouh@insa-rennes.fr Abstract--Wireless Sensor Networks (WSN) may be a very useful technology by the topology evolution of the network and the analysis of RSSI levels of links between sensor nodes. Keywords-Wireless

  8. Detecting and Locating Radioactive Signals with Wireless Sensor Networks

    E-Print Network [OSTI]

    Zhang, Tonglin

    Detecting and Locating Radioactive Signals with Wireless Sensor Networks Tonglin Zhang Department-765-4940558 AbstractMethods of detecting and locating nuclear radioac- tive targets via wireless sensor networks (WSN model, radia- tion and radioactive isotopes, wireless sensor network. I. INTRODUCTION Currently, using

  9. PSFQ: A Reliable Transport Protocol for Wireless Sensor Networks

    E-Print Network [OSTI]

    Han, Richard Y.

    PSFQ: A Reliable Transport Protocol for Wireless Sensor Networks Chieh-Yih Wan Dept. of Electrical class of reliable data applications emerging in wireless sensor networks. For example, currently sensor of sensors in wireless sensor networks on the fly (e.g., during disaster recovery). Due to the application

  10. Key Predistribution Techniques for Grid-Based Wireless Sensor Networks

    E-Print Network [OSTI]

    Key Predistribution Techniques for Grid-Based Wireless Sensor Networks Simon R. Blackburn1 , Tuvi sensor networks. Networks consisting of wireless sensor nodes ar- ranged in a grid pattern have many for the instantiation of these schemes. Key words: Key predistribution, wireless sensor networks; symmetric key

  11. Channel Bonding in Cognitive Radio Wireless Sensor Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Channel Bonding in Cognitive Radio Wireless Sensor Networks Mubashir Husain Rehmani, St-mail: rehmani@univ-mlv.fr, lohier@univ-mlv.fr, rachedi@univ-mlv.fr Abstract--Recently, wireless sensor networks, Wireless Multimedia Sensor Networks (WMSNs) have lot of new potential applications in different domains

  12. Threshold-Controlled Global Cascading in Wireless Sensor Networks

    E-Print Network [OSTI]

    Varela, Carlos

    Threshold-Controlled Global Cascading in Wireless Sensor Networks Qiming Lu and G. Korniss is a challenging task. Wireless Sensor Networks (WSNs) provide an example where understanding dynamical processes and other wireless ad- hoc networks. First, sensor nodes are often densely deployed (typically 20 sensor per

  13. Cross-layered Synchronization Protocol for Wireless Sensor Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Cross-layered Synchronization Protocol for Wireless Sensor Networks Thomas Beluch, Daniela. Advances in wireless sensor network performances and improvement of attainable bit rates allow research on such measurement systems using Wireless Sensor Networks (WSNs). However, current WSN synchronization protocols do

  14. Managing Wireless Sensor Networks with Supply Chain Strategy

    E-Print Network [OSTI]

    Latchman, Haniph A.

    Managing Wireless Sensor Networks with Supply Chain Strategy Wei Liu , Yanchao Zhang, Wenjing Lou Email: {liuw@,yczhang@,fang@ece.}ufl.edu Email: wjlou@ece.wpi.edu Abstract-- Wireless sensor networks wireless sensor networks (WSNs) be identified as one of the most important technologies that will change

  15. Intelligent Management of Misbehaving Nodes In Wireless Sensor Networks

    E-Print Network [OSTI]

    Gesbert, David

    Intelligent Management of Misbehaving Nodes In Wireless Sensor Networks Using Blackhole@eurecom.fr Abstract--Misbehaving nodes in wireless sensor networks and ad hoc networks often disrupt the operation delivery and erroneous data outputs for wireless sensor networks. Existing literatures have addressed

  16. The Coverage Problem in Three-Dimensional Wireless Sensor Networks

    E-Print Network [OSTI]

    Tseng, Yu-Chee

    The Coverage Problem in Three-Dimensional Wireless Sensor Networks Chi-Fu Huang, Yu-Chee Tseng- bedded micro-sensing MEMS technologies has made wireless sensor networks possible. Such environments may protocols [7], [8], [9]. Localization and positioning applications of wireless sensor networks are discussed

  17. Data Collection and Management Solution for Wireless Sensor Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Data Collection and Management Solution for Wireless Sensor Networks G. De Sousa1 , J.-P. Chanet1 Aubičre cedex, France Correspondent author: gil.de-sousa@cemagref.fr Abstract Wireless sensors networks on wireless sensors, implementing a hardware component-based concept, that allow them to be combined to form

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

    E-Print Network [OSTI]

    Boucherie, Richard J.

    Effective Scheduling for Coded Distributed Storage in Wireless Sensor Networks Jan-Willem van Bloem in a decentralized fashion for any rate below this maximum. 1 Introduction In wireless sensor networks, reliable data storage is essential for coping with fail- ures. Wireless sensor networks consist of cooperating devices

  19. Wireless Critical Process Control in oil and gas refinery plants

    E-Print Network [OSTI]

    Savazzi, Stefano

    Wireless Critical Process Control in oil and gas refinery plants Stefano Savazzi1, Sergio Guardiano control in in- dustrial plants and oil/gas refineries. In contrast to wireline communication, wireless of an oil refinery is illustrated in Fig. 1: typical locations of wireless devices used for re- mote control

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

    E-Print Network [OSTI]

    Zhuang, Weihua

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

  1. Information Delivery in Large Wireless Networks with Minimum Energy Expense

    E-Print Network [OSTI]

    Wang, Wenye

    transmission paths [8], [9]. By spending the energy resources in a wireless network wisely, the existingInformation Delivery in Large Wireless Networks with Minimum Energy Expense Yi Xu and Wenye Wang in large-scale multihop wireless networks because of the limited energy supplies from batteries. We

  2. Energy Efficiency of Encryption Schemes Applied to Wireless Sensor Networks

    E-Print Network [OSTI]

    Heys, Howard

    University. 2. Based on "An Analysis of Link Layer Encryption Schemes in Wireless Sensor Networks" by X In this paper, we focus on the energy efficiency of secure communication in wireless sensor networks (WSNs). Our - wireless sensor networks; security; encryption; cryptographic algorithm; stream cipher; block cipher 1

  3. Inheritance of cotton fiber length and distribution

    E-Print Network [OSTI]

    Braden, Chris Alan

    2006-10-30T23:59:59.000Z

    Fiber quality data from five upland cotton (Gossypium hirsutum L.) genotypes, which were grown at College Station, TX during 2001 and 2002, were subjected to diallel and generation means analyses to determine the potential for improvement of fiber...

  4. Breakthrough: Better Fiber for Better Products

    ScienceCinema (OSTI)

    Griffith, George; Garnier, John;

    2013-05-28T23:59:59.000Z

    Researchers at Idaho National Laboratory have developed a cost-effective method for the continuous production of alpha silicon carbide fiber. The exceptionally strong, lightweight fiber could enable significant performance improvements in many everyday products.

  5. Novel fiber optic polarimetric torsion sensor based on polarization-maintaining photonic crystal fiber

    E-Print Network [OSTI]

    Wai, Ping-kong Alexander

    Novel fiber optic polarimetric torsion sensor based on polarization- maintaining photonic crystal other engineering applications. Compared with conventional torsion sensors, the fiber optic torsion sensors have the distinct advantages of all-fiber-optical sensing. The fiber optic torsion sensors based

  6. Interferometric fiber-optic bending/nano-displacement sensor using plastic dual-core fiber

    E-Print Network [OSTI]

    Skorobogatiy, Maksim

    Interferometric fiber-optic bending/nano-displacement sensor using plastic dual-core fiber H. Qu,1); published August 13, 2014 We demonstrate an interferometric fiber-optic bending/nano-displacement sensor for sensing the displacement. © 2014 Optical Society of America OCIS codes: (060.2370) Fiber optics sensors

  7. Applications of fiber optics in physical protection

    SciTech Connect (OSTI)

    Buckle, T.H. [Sandia National Labs., Albuquerque, NM (United States)

    1994-03-01T23:59:59.000Z

    The purpose of this NUREG is to provide technical information useful for the development of fiber-optic communications and intrusion detection subsystems relevant to physical protection. There are major sections on fiber-optic technology and applications. Other topics include fiber-optic system components and systems engineering. This document also contains a glossary, a list of standards and specifications, and a list of fiber-optic equipment vendors.

  8. High pressure fiber optic sensor system

    SciTech Connect (OSTI)

    Guida, Renato; Xia, Hua; Lee, Boon K; Dekate, Sachin N

    2013-11-26T23:59:59.000Z

    The present application provides a fiber optic sensor system. The fiber optic sensor system may include a small diameter bellows, a large diameter bellows, and a fiber optic pressure sensor attached to the small diameter bellows. Contraction of the large diameter bellows under an applied pressure may cause the small diameter bellows to expand such that the fiber optic pressure sensor may measure the applied pressure.

  9. Fiber-optic displacement sensor system

    E-Print Network [OSTI]

    Cava, Norayda Nora

    1990-01-01T23:59:59.000Z

    . Light pulses from a light emitting diode (LED) were coupled into a multimode fiber. The displacement of a mirror positioned near the end of the fiber was measured by monitoring the amplitude of the reflected pulses. A reference reflection from a... emitting diode (LED) were coupled into a multimode fiber. The displacement of a mirror positioned near the end of the fiber was measured by monitoring the amplitude...

  10. Fiber optic diffraction grating maker

    DOE Patents [OSTI]

    Deason, Vance A. (Idaho Falls, ID); Ward, Michael B. (Idaho Falls, ID)

    1991-01-01T23:59:59.000Z

    A compact and portable diffraction grating maker comprised of a laser beam, optical and fiber optics devices coupling the beam to one or more evanescent beam splitters, and collimating lenses or mirrors directing the split beam at an appropriate photosensitive material. The collimating optics, the output ends of the fiber optic coupler and the photosensitive plate holder are all mounted on an articulated framework so that the angle of intersection of the beams can be altered at will without disturbing the spatial filter, collimation or beam quality, and assuring that the beams will always intersect at the position of the plate.

  11. Fiber optic diffraction grating maker

    DOE Patents [OSTI]

    Deason, V.A.; Ward, M.B.

    1991-05-21T23:59:59.000Z

    A compact and portable diffraction grating maker is comprised of a laser beam, optical and fiber optics devices coupling the beam to one or more evanescent beam splitters, and collimating lenses or mirrors directing the split beam at an appropriate photosensitive material. The collimating optics, the output ends of the fiber optic coupler and the photosensitive plate holder are all mounted on an articulated framework so that the angle of intersection of the beams can be altered at will without disturbing the spatial filter, collimation or beam quality, and assuring that the beams will always intersect at the position of the plate. 4 figures.

  12. Proc. of IEEE Wireless Communications and Networking Conference (WCNC), March 2003 Mobility Patterns in Microcellular Wireless Networks

    E-Print Network [OSTI]

    Peha, Jon M.

    Proc. of IEEE Wireless Communications and Networking Conference (WCNC), March 2003 Mobility Patterns in Microcellular Wireless Networks Suttipong Thajchayapong and Jon M. Peha Department- cellular wireless networks, based on measurements from the 802.11-based system that blankets the Carnegie

  13. 1872 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 11, NO. 5, MAY 2012 Power-Trading in Wireless Communications

    E-Print Network [OSTI]

    Jayaweera, Sudharman K.

    1872 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 11, NO. 5, MAY 2012 Power-Trading the concept of power trading in wireless communications. We present a business model using sealed bid procurement auction based game theory for power-trading in cooperative wireless communication with quality

  14. Assessing Deterioration of ADSS Fiber Optic Cables

    E-Print Network [OSTI]

    Assessing Deterioration of ADSS Fiber Optic Cables Due to Corona Discharge Final Project Report of ADSS Fiber Optic Cables Due to Corona Discharge Final Project Report George G. Karady, Project Leader-Supporting) fiber optic cables installed on high voltage lines. The high electric field on those lines generates

  15. Officials launch Carbon Fiber Technology Facility, announce

    E-Print Network [OSTI]

    Pennycook, Steve

    to reduce carbon fiber's high cost, Danielson noted: "Many of these new clean energy technologies are withinSCIENCE Officials launch Carbon Fiber Technology Facility, announce new manufacturing initiative and a large crowd of local business and civic leaders came to the Carbon Fiber Technology Facility (CFTF

  16. Opportunities of Wireless Sensors and Controls for Building Operation

    SciTech Connect (OSTI)

    Kintner-Meyer, Michael CW

    2004-09-30T23:59:59.000Z

    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.

  17. Near Optimal Broadcast with Network Coding in Large Homogeneous Wireless Sensor Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Near Optimal Broadcast with Network Coding in Large Homogeneous Wireless Sensor Networks C of wireless "homogeneous" sensor networks contained of the plane: wireless lattice networks, and dense unit of application is wireless sensor net- works, and indeed network coding has been used in wireless networks

  18. Wireless Demand Response Controls for HVAC Systems

    SciTech Connect (OSTI)

    Federspiel, Clifford

    2009-06-30T23:59:59.000Z

    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.

  19. Fiber-type dosimeter with improved illuminator

    DOE Patents [OSTI]

    Fox, R.J.

    1985-12-23T23:59:59.000Z

    A single-piece, molded plastic, Cassigrainian-type condenser arrangement is incorporated in a tubular-shaped personal pocket dosimeter of the type which combines an ionization chamber with an optically-read fiber electrometer to provide improved illumination of the electrometer fiber. The condenser routes incoming light from one end of the dosimeter tubular housing around a central axis charging pin assembly and focuses the light at low angles to the axis so that it falls within the acceptance angle of the electrometer fiber objective lens viewed through an eyepiece lens disposed in the opposite end of the dosimeter. This results in improved fiber illumination and fiber image contrast.

  20. Side-emitting fiber optic position sensor

    DOE Patents [OSTI]

    Weiss, Jonathan D. (Albuquerque, NM)

    2008-02-12T23:59:59.000Z

    A side-emitting fiber optic position sensor and method of determining an unknown position of an object by using the sensor. In one embodiment, a concentrated beam of light source illuminates the side of a side-emitting fiber optic at an unknown axial position along the fiber's length. Some of this side-illuminated light is in-scattered into the fiber and captured. As the captured light is guided down the fiber, its intensity decreases due to loss from side-emission away from the fiber and from bulk absorption within the fiber. By measuring the intensity of light emitted from one (or both) ends of the fiber with a photodetector(s), the axial position of the light source is determined by comparing the photodetector's signal to a calibrated response curve, look-up table, or by using a mathematical model. Alternatively, the side-emitting fiber is illuminated at one end, while a photodetector measures the intensity of light emitted from the side of the fiber, at an unknown position. As the photodetector moves further away from the illuminated end, the detector's signal strength decreases due to loss from side-emission and/or bulk absorption. As before, the detector's signal is correlated to a unique position along the fiber.

  1. Optical fiber sensors for harsh environments

    DOE Patents [OSTI]

    Xu, Juncheng; Wang, Anbo

    2007-02-06T23:59:59.000Z

    A diaphragm optic sensor comprises a ferrule including a bore having an optical fiber disposed therein and a diaphragm attached to the ferrule, the diaphragm being spaced apart from the ferrule to form a Fabry-Perot cavity. The cavity is formed by creating a pit in the ferrule or in the diaphragm. The components of the sensor are preferably welded together, preferably by laser welding. In some embodiments, the entire ferrule is bonded to the fiber along the entire length of the fiber within the ferrule; in other embodiments, only a portion of the ferrule is welded to the fiber. A partial vacuum is preferably formed in the pit. A small piece of optical fiber with a coefficient of thermal expansion chosen to compensate for mismatches between the main fiber and ferrule may be spliced to the end of the fiber.

  2. Tags, wireless communication systems, tag communication methods, and wireless communications methods

    DOE Patents [OSTI]

    Scott; Jeff W. (Pasco, WA), Pratt; Richard M. (Richland, WA)

    2006-09-12T23:59:59.000Z

    Tags, wireless communication systems, tag communication methods, and wireless communications methods are described. In one aspect, a tag includes a plurality of antennas configured to receive a plurality of first wireless communication signals comprising data from a reader, a plurality of rectifying circuits coupled with. respective individual ones of the antennas and configured to provide rectified signals corresponding to the first wireless communication signals, wherein the rectified signals are combined to produce a composite signal, an adaptive reference circuit configured to vary a reference signal responsive to the composite signal, a comparator coupled with the adaptive reference circuit and the rectifying circuits and configured to compare the composite signal with respect to the reference signal and to output the data responsive to the comparison, and processing circuitry configured to receive the data from the comparator and to process the data.

  3. Policy #3310 Allowance for Usage of Personal Mobile Devices and Wireless Service for University Business 1 OLD DOMINION UNIVERSITY

    E-Print Network [OSTI]

    with a wireless service allowance must maintain an active wireless service contract for the life of the allowance

  4. Wireless Network Security and Interworking MINHO SHIN, JUSTIN MA, ARUNESH MISHRA, AND WILLIAM A. ARBAUGH

    E-Print Network [OSTI]

    Wireless Network Security and Interworking MINHO SHIN, JUSTIN MA, ARUNESH MISHRA, AND WILLIAM A, in- terworking between heterogeneous wireless networks is extremely important for ubiquitous and high communication technologies cover a whole spec- trum from wireless personal area networks (WPANs

  5. Achieving Quality of Service Guarantees for Delay Sensitive Applications in Wireless Networks 

    E-Print Network [OSTI]

    Abedini, Navid

    2012-10-19T23:59:59.000Z

    the delay issue in some major instances of wireless communication networks. First, we study a wireless content distribution network (CDN), in which the requests for the content may have service deadlines. Our wireless CDN consists of a media vault...

  6. CS 547: Wireless Networking Ubiquitous access to information, anywhere, anyplace, and anytime, will characterize whole new

    E-Print Network [OSTI]

    Heller, Barbara

    CS 547: Wireless Networking Objectives Ubiquitous access to information, anywhere, anyplace mechanisms. This course introduces broadcast radio networks, cellular networks, ad hoc wireless networks Hoc (Multihop Packet radio) Wireless Networks Asymptotic Critical Transmission Range for Connectivity

  7. Demo Abstract: A Unified Architecture for Flexible Radio Power Management in Wireless Sensor Networks

    E-Print Network [OSTI]

    Lu, Chenyang

    Demo Abstract: A Unified Architecture for Flexible Radio Power Management in Wireless Sensor Terms Experimentation, Design Keywords Wireless Sensor Networks, Radio Power Management, Architecture, Framework 1 Overview Radio power management is of paramount concern in wireless sensor networks. While

  8. Maximum Network Lifetime in Wireless Sensor Networks with Adjustable Sensing Ranges

    E-Print Network [OSTI]

    Wu, Jie

    1 Maximum Network Lifetime in Wireless Sensor Networks with Adjustable Sensing Ranges Mihaela problem in wireless sensor networks with adjustable sensing range. Communication and sensing consume Wireless sensor networks (WSNs) constitute the foundation of a broad range of applications related

  9. Designing Wireless Sensor Networks as a Shared Resource for Sustainable Development

    E-Print Network [OSTI]

    2006-01-01T23:59:59.000Z

    J. Kaiser. High wireless sensor network for long-term, in-Designing Wireless Sensor Networks as a Shared Resource forAbstract Introduction Wireless sensor networks (WSNs) are a

  10. Ubiquitous communications for wireless personal area networks in a heterogeneous environment 

    E-Print Network [OSTI]

    Ma, Junkang

    2010-06-28T23:59:59.000Z

    The widespread use of wireless technologies has led to a tremendous development in wireless communication systems. Currently, an individual mobile user may carry multiple personal devices with multiple wireless interfaces, ...

  11. Communication in automation, including networking and wireless

    E-Print Network [OSTI]

    Antsaklis, Panos

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

  12. Multiagent Coordination in Microgrids via Wireless Networks

    E-Print Network [OSTI]

    Shen, Xuemin "Sherman"

    is indispensable to incorporate more distributed energy resource (DER) units, such as the distributed generation load (or generator) or islanded as a self-sustained power system, which significantly simplifies by localized elec- tricity generation, storage, and consumption. Wireless communication is a promising means

  13. A Retasking Framework For Wireless Sensor Networks

    E-Print Network [OSTI]

    Weigle, Michele

    , built upon Deluge [1], is a wireless network code distribution protocol enabling node group management it affords. Deluge [1] is one of the approaches used to realize this concept. Deluge is a reliable and robust several limitations. First, Deluge is limited only to network-wide dissemination of program binaries

  14. Wireless LAN Security April 24, 2007

    E-Print Network [OSTI]

    Gao, Jie

    , and in the carelessness and ignorance that exists at the user and corporate IT level. Cracking methods have become much more sophisticated and innovative with wireless. Cracking has become much easier and more accessible in that proprietary company information is exposed and now there could exist a link from one company to the other

  15. Wireless Sensor Networks in Smart Structural Technologies

    E-Print Network [OSTI]

    Stanford University

    of wireless devices can impede real-time operations as required by control or monitoring systems. In addition monitoring (SHM) system measures structural responses and predicts, identifies, and locates the onset and technical challenges. Besides the desire for portable long- lasting energy sources, such as batteries

  16. Power Control Algorithms in Wireless Communications

    E-Print Network [OSTI]

    Power Control Algorithms in Wireless Communications Judd Rohwer , Chaouki T. Abdallah , Aly El-Osery 1 Abstract This paper presents a comprehensive review of the published algorithms on power control) and Time Division Multiple Access (TDMA). 2 Introduction Power control in cellular systems is applied

  17. Graphene-enabled Wireless Communication Networks

    E-Print Network [OSTI]

    Politècnica de Catalunya, Universitat

    Graphene-enabled Wireless Communication Networks at the Nanoscale 1 Ignacio Llatser Nanonetworking;Graphene Honeycomb lattice of carbon atoms 2-dimensional material Discovered by A. K. Geim and K. S. Novoselov 9 Graphene G. Liu, W. Stillman, S. Rumyantsev, Q. Shao, M. Shur, A. A. Balandin, "Low

  18. Distributed Power Control in Wireless Communication Systems

    E-Print Network [OSTI]

    Chronopoulos, Anthony T.

    Distributed Power Control in Wireless Communication Systems S. Jagannathan A. T. Chronopoulos, S layered structure in that we jointly address the issue of transmitted power levels in point to point commu the transmitter power at a given node increases not only the operating life of the bat- tery but also the overall

  19. Green Wireless Cognition: Future Efficient Spectrum Sharing

    E-Print Network [OSTI]

    Shihada, Basem

    Underwater Vehicles The project aims to develop an unmanned fully autonomous under water vehicles (UWV Spectrum Wireless Sensor in Underwater Networks * Bell's Law of Computer Classes formulated by Gordon Bell the challenges of underwater communications by an integration of sensor and multihop networks. Human

  20. Multiagent coordination in microgrids via wireless networks

    E-Print Network [OSTI]

    Hao Liang; Atef Abdrabou

    The future smart grid is expected to be an integration of intelligent microgrids featured by localized electricity generation, storage, and consumption. Wireless communication is a promising means to facilitate pervasive microgrid monitoring and control at a high flexibility and low deployment cost

  1. DISTRIBUTED OPPORTUNISTIC TRANSMISSION FOR WIRELESS SENSOR NETWORKS

    E-Print Network [OSTI]

    Islam, M. Saif

    DISTRIBUTED OPPORTUNISTIC TRANSMISSION FOR WIRELESS SENSOR NETWORKS Qing Zhao and Lang Tong School Strategy We consider the problem of information retrieval in sensor networks with mobile access points on Communica- tion and Networks under Grant DAAD19-01-2-0011. ˘ Fig. 1: Sensor networks with mobile access

  2. Applications of Industrial Wireless Sensor Milan Erdelj

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ...................................... 10 1.3.2.2 Hazard ........................................ 10 1.3.2.3 Security manuscript, published in "Industrial Wireless Sensor Networks: Applications, Protocols, and Standards CRC the problems of air, water (together with waste water) pollution, but covers the production material pollution

  3. Marginal Expense Oil Well Wireless Surveillance (MEOWWS)

    SciTech Connect (OSTI)

    Nelson, Donald G.

    2002-03-11T23:59:59.000Z

    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.

  4. CS647 -Advanced Topics in Wireless Networks

    E-Print Network [OSTI]

    Amir, Yair

    more computing power in smaller devices flat, lightweight displays with low power consumption new user - Cellular Maintaining the telephone number across geographical areas in a wireless and mobile system Microwave Tower Cell Chicago Washington, DC #12;CS 647 1.7 First Generation Cellular Systems and Services

  5. TESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS

    E-Print Network [OSTI]

    Trajkovic, Ljiljana

    to align with the electric field. The Inventions, Researches and Writings of Nikola Tesla #12;March 12TESLA'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

  6. Wireless networks and mobile Ivan Stojmenovic

    E-Print Network [OSTI]

    Stojmenovic, Ivan

    medium #12;Nikola Tesla 1856-1943 · The Serbian-American inventor, electrical engineer, and scientist plant at Niagara Falls 1895 #12;Nikola Tesla's inventions · Radio/wireless transmission · US Supreme Court awarded patent to Tesla in 1945, taking it from Marconi #12;Lost inventions · When Nikola Tesla

  7. Partially Controlled Deployment Strategies for Wireless Sensors

    E-Print Network [OSTI]

    Santi, Paolo

    be formed and used in several application scenarios: smart home environ- ments, intrusion detection a certain set of grid-like strategies that reflect the (one- or two-dimensional) symmetry of the region years. By con- necting tiny, smart sensor nodes by means of wireless transceivers, large WSNs Part

  8. Ferry-Based Linear Wireless Sensor Networks

    E-Print Network [OSTI]

    Wu, Jie

    of oil, gas, and water pipeline infrastructure using wireless sensor networks. #12;IEEE Globecom 2013 UAE (2006): 2,580 Km of gas pipelines 2,950 Km of oil pipelines 156 Km of refined products pipelines. Desalinated water. Saudi Arabia: 3,800 Km. Oil, Gas, and Water Pipeline UseOil, Gas, and Water

  9. Automation of a Wireless Cotton Module Tracking System for Cotton Fiber Quality Mapping

    E-Print Network [OSTI]

    Sjolander, Andrew J.

    2010-10-12T23:59:59.000Z

    ....................................................................................................................... 43 5. Simulated harvester transfer types ...................................................................................................... 58 6. Question 1a testing results...) ................................................................................................................ 2 2. Dump scenarios with two harvesters, boll buggies, and module builders. (Ge, 2007) ...... 5 3. Basket load cell configurations tested. (Thomas et al., 1999) ................................................... 13 4. Mounting locations...

  10. A Model for Fiber Length Attrition in Injection-Molded Long-Fiber Composites

    SciTech Connect (OSTI)

    TuckerIII, Charles L. [University of Illinois, Urbana-Champaign; Phelps, Jay H [University of Illinois, Urbana-Champaign; El-Rahman, Ahmed Abd [University of Illinois, Urbana-Champaign; Kunc, Vlastimil [ORNL

    2013-01-01T23:59:59.000Z

    Long-fiber thermoplastic (LFT) composites consist of an engineering thermoplastic matrix with glass or carbon reinforcing fibers that are initially 10 to 13 mm long. When an LFT is injection molded, flow during mold filling orients the fibers and degrades the fiber length. Fiber orientation models for injection molding are well developed, and special orientation models for LFTs have been developed. Here we present a detailed quantitative model for fiber length attrition in a flowing fiber suspension. The model tracks a discrete fiber length distribution (FLD) at each spatial node. Key equations are a conservation equation for total fiber length, and a breakage rate equation. The breakage rate is based on buckling of fibers due to hydrodynamic forces, when the fibers are in unfavorable orientations. The FLD model is combined with a mold filling simulation to predict spatial and temporal variations in fiber length distribution in a mold cavity during filling. The predictions compare well to experiments on a glassfiber/ PP LFT molding. Fiber length distributions predicted by the model are easily incorporated into micromechanics models to predict the stress-strain behavior of molded LFT materials. Author to whom correspondence should be addressed; electronic mail: ctucker@illinois.edu 1

  11. ORNL Visitor Wireless Network: Registration Instructions As a visitor to Oak Ridge National Laboratory (ORNL), wireless computer networking is available to you in many of our

    E-Print Network [OSTI]

    Pennycook, Steve

    ORNL Visitor Wireless Network: Registration Instructions As a visitor to Oak Ridge National Laboratory (ORNL), wireless computer networking is available to you in many of our buildings. To gain access, your PC must have a wireless Ethernet card. To gain access to the wireless network, follow these steps

  12. Interferometric fiber optic displacement sensor

    DOE Patents [OSTI]

    Farah, J.

    1999-04-06T23:59:59.000Z

    A method is presented to produce a change in the optical path length in the gap between two single mode optical fibers proportional to the lateral displacement of either fiber end normal to its axis. This is done with the use of refraction or diffraction at the interface between a guiding and non-guiding media to change the direction of propagation of the light in the gap. A method is also presented for laying a waveguide on a cantilever so that the displacement of the tip of the cantilever produces a proportional path length change in the gap by distancing the waveguide from the neutral axis of the cantilever. The fiber is supported as a cantilever or a waveguide is deposited on a micromachined cantilever and incorporated in an interferometer which is made totally on a silicon substrate with the use of integrated-optic technology. A resonant element in the form of a micro-bridge is incorporated in the ridge waveguide and produces a frequency output which is readily digitizeable and immune to laser frequency noise. Finally, monolithic mechanical means for phase modulation are provided on the same sensor substrate. This is done by vibrating the cantilever or micro-bridge either electrically or optically. 23 figs.

  13. Interferometric fiber optic displacement sensor

    DOE Patents [OSTI]

    Farah, John (M.I.T. P.O. Box 397301, Cambridge, MA 02139)

    1999-01-01T23:59:59.000Z

    A method is presented to produce a change in the optical path length in the gap between two single mode optical fibers proportional to the lateral displacement of either fiber end normal to its axis. This is done with the use of refraction or diffraction at the interface between a guiding and non-guiding media to change the direction of propagation of the light in the gap. A method is also presented for laying a waveguide on a cantilever so that the displacement of the tip of the cantilever produces a proportional path length change in the gap by distancing the waveguide from the neutral axis of the cantilever. The fiber is supported as a cantilever or a waveguide is deposited on a micromachined cantilever and incorporated in an interferometer which is made totally on a silicon substrate with the use of integrated-optic technology. A resonant element in the form of a micro-bridge is incorporated in the ridge waveguide and produces a frequency output which is readily digitizeable and immune to laser frequency noise. Finally, monolithic mechanical means for phase modulation are provided on the same sensor substrate. This is done by vibrating the cantilever or micro-bridge either electrically or optically.

  14. ON THE GAGE FACTOR FOR OPTICAL FIBER GRATING STRAIN GAGES

    E-Print Network [OSTI]

    Park, Yong-Lae

    ON THE GAGE FACTOR FOR OPTICAL FIBER GRATING STRAIN GAGES Richard J. Black1 , David Zare1 , Levy Oblea1 , Yong-Lae Park1 , Behzad Moslehi1 , and Craig Neslen2 1 Intelligent Fiber Optic Systems of grating and fiber types. KEY WORDS: Fiber-Optic Gratings, Fiber-Optic Sensors, Strain Gage Factor 1

  15. V-076: Cisco Wireless LAN Controller Bugs Let Remote Users Deny...

    Office of Environmental Management (EM)

    Services Routers (ISRs) Cisco Catalyst 3750G Integrated WLCs Cisco Flex 7500 Series Cloud Controller Cisco Virtual Wireless Controller Cisco Wireless Controller Software for...

  16. Rugged fiber optic probe for raman measurement

    DOE Patents [OSTI]

    O'Rourke, Patrick E. (Martinez, GA); Toole, Jr., William R. (Aiken, SC); Nave, Stanley E. (Evans, GA)

    1998-01-01T23:59:59.000Z

    An optical probe for conducting light scattering analysis is disclosed. The probe comprises a hollow housing and a probe tip. A fiber assembly made up of a transmitting fiber and a receiving bundle is inserted in the tip. A filter assembly is inserted in the housing and connected to the fiber assembly. A signal line from the light source and to the spectrometer also is connected to the filter assembly and communicates with the fiber assembly. By using a spring-loaded assembly to hold the fiber connectors together with the in-line filters, complex and sensitive alignment procedures are avoided. The close proximity of the filter assembly to the probe tip eliminates or minimizes self-scattering generated by the optical fiber. Also, because the probe can contact the sample directly, sensitive optics can be eliminated.

  17. ROOM TEMPERATURE STRENGTH DEGRADATION OF OPTICAL FIBERS

    E-Print Network [OSTI]

    Matthewson, M. John

    temperatures. 6 :4 Aging Time (s) Fig. 2. Residual strength of fiber B after aging in deionized water. Aging Time (s) Fig. 4. Data of Griffioen3 for residual strength (strain to failure) of fiber aged in water. 1) Fig. 1 . Residual strength of fiber A after aging in distilled water. io 10 i0 106 io 108 1.0 0.9 0 (0

  18. Programmable optic-fiber delay line

    E-Print Network [OSTI]

    Fang, Shin-Puu

    1991-01-01T23:59:59.000Z

    . Motion of coupled pendula . 4. Circuit schematic of temperature control 5. Basic configuration of electric arc fusion splicer . . . 6. The arrangement of heater 7. The output optical power from one port versus the temperature of the heater 8... ( stripping tool ) and chemical stripping ( acetone or methylene chloride ) technique can be used to remove the protective polymer fiber coating. A commercial Fujikura ct-40 fiber cleaver used skillfully can produce an end surface suitable for fiber fusion...

  19. Fiber-optic displacement sensor system 

    E-Print Network [OSTI]

    Cava, Norayda Nora

    1990-01-01T23:59:59.000Z

    . 54 CHAPTER I INTRODUCTION The implementation of fiber optics in sensor systems is not a new idea; its popularity has steadily increased through the years. Although technological advances have much to do with this, certain characteristic.... The microbending scheme for displacement measurements [10], [11] takes advantage of the fact that when optical fibers are bent at sharp angles, energy will escape through the bent fiber walls. Maximum sensitivity for this scheme is achieved by minimizing...

  20. Fiber optic temperature sensor using a grating on an angled fiber tip

    E-Print Network [OSTI]

    Varadarajan, Harini

    2000-01-01T23:59:59.000Z

    CHAPTER Page 2. Spinning the Photo Resist. 20 3. Laser Exposure 21 4. Photo Resist Developing. . . . 25 5. Etching the Fiber. 26 B. Testing 29 1. Test Setup. 2. Test Results 29 30 V CONCLUSIONS. . 40 VI RECOMMENDED FUTURE RESEARCH . . 41.... Reusable Polishing Puck. . 14 . 17 11. Fibers in the Polishing Puck. 12. Polish Pad Surfaces. 13. Profile of Polished Fibers. 14. Photograph of Polished Fibers on Metal Puck 18 19 . 19 . 20 15. Argon Laser Setup. 22 16. Laser Setup Details. 23...

  1. The Influences of Fiber Feature and Polymer Melt Index on Mechanical Properties of Sugarcane Fiber/Polymer

    E-Print Network [OSTI]

    The Influences of Fiber Feature and Polymer Melt Index on Mechanical Properties of Sugarcane Fiber/Polymer.interscience.wiley.com). ABSTRACT: The fiber characteristics (i.e., the fiber type, morphology, and dimension) and polymer melt flow sugarcane fiber/polymer composites, the HDPE resins with a low MFI value presented high tensile and impact

  2. Natural Fiber Composites: Retting, Preform Manufacture & Molding...

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

    Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C. lm12smith.pdf More Documents & Publications Natural Fiber Composites: Retting, Preform...

  3. Compound droplet manipulations on fiber arrays

    E-Print Network [OSTI]

    Weyer, Floriane; Dreesen, Laurent; Vandewalle, Nicolas

    2015-01-01T23:59:59.000Z

    Recent works demonstrated that fiber arrays may constitue the basis of an open digital microfluidics. Various processes, such as droplet motion, fragmentation, trapping, release, mixing and encapsulation, may be achieved on fiber arrays. However, handling a large number of tiny droplets resulting from the mixing of several liquid components is still a challenge for developing microreactors, smart sensors or microemulsifying drugs. Here, we show that the manipulation of tiny droplets onto fiber networks allows for creating compound droplets with a high complexity level. Moreover, this cost-effective and flexible method may also be implemented with optical fibers in order to develop fluorescence-based biosensor.

  4. Natural Fiber Composites: Retting, Preform Manufacture & Molding...

    Energy Savers [EERE]

    "Mega" Merit Review 2008 on February 25, 2008 in Bethesda, Maryland. merit08smith3.pdf More Documents & Publications Natural Fiber Composites: Retting, Preform...

  5. Lower Cost, Higher Performance Carbon Fiber

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

    of Energy Presentationname Questions for Today Materials How can the cost of carbon fiber suitable for higher performance applications (H 2 Storage) be developed? H 2...

  6. Final Scientific Report - Wireless and Sensing Solutions Advancing Industrial Efficiency

    SciTech Connect (OSTI)

    Budampati, Rama; McBrady, Adam; Nusseibeh, Fouad

    2009-09-28T23:59:59.000Z

    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.

  7. Optimized Node Selection for Compressive Sleeping Wireless Sensor Networks

    E-Print Network [OSTI]

    Chen, Wei; Wassell, Ian J.

    2015-02-05T23:59:59.000Z

    1Optimized Node Selection for Compressive Sleeping Wireless Sensor Networks Wei Chen, Member, IEEE, and Ian J. Wassell Abstract—In this paper, we propose an active node selection framework for compressive sleeping wireless sensor networks (WSNs... development oftechnologies in sensing, computing and communication has made it possible to employ wireless sensor networks (WSNs) to continuously monitor physical phenomena in a variety of applications, for example air quality monitoring, wildlife tracking...

  8. Efficiency of pump absorption in double-clad fiber amplifiers. I. Fiber with circular symmetry

    E-Print Network [OSTI]

    Kouznetsov, Dmitrii

    Efficiency of pump absorption in double-clad fiber amplifiers. I. Fiber with circular symmetry with an absorbing core is treated as a model for pump absorption in a double-clad optical fiber amplifier. Mode the pump absorption and is analyzed in the speckle-mode approximation for the example of a Kerr

  9. Fiber ReinforcedFiber Reinforced CementitiousCementitious CompositesComposites B. Mobasher

    E-Print Network [OSTI]

    Mobasher, Barzin

    prefabricated shapes panels shotcrete curtain walls Slabs on grade precast elements Composite decks Vaults Continuous and discontinuous fibers Natural, Asbestos, Wood, rock wool. Synthetic, Steel, E-glass, AR Glass of Interface Weak Zone Steel fibers, high w/c, CH formation Glass fibers strand effect, embrittlement, filling

  10. Solar-Powered Smart Wireless Camera Network for Outdoor Monitoring

    E-Print Network [OSTI]

    Abas, Kevin Mathys

    2015-01-01T23:59:59.000Z

    Solar-Powered Wireless Visual SensorProtocols . . . . . . . . . . . . . Solar HarvestingCard B MSP430 Firmware Source C Solar Harvesting Efficiency

  11. Prototype system brings advantages of wireless technology to...

    National Nuclear Security Administration (NNSA)

    the NNSA, other federal agencies and critical manufacturing facilities. The Savannah River National Laboratory designed and fabricated a prototype wireless Tritium Air...

  12. How the coming wireless revolution will impact manufacturing

    SciTech Connect (OSTI)

    Shourbaji, A.A.; Manges, W.W.

    1996-01-01T23:59:59.000Z

    Wireless technology refers to signal transmission such as microwave, infrared (IR), laser beams, and radio frequency (RF) in which the transmitting medium is wireless. Until recently, wireless applications were limited to specialized cases in select industries and research laboratories. Most commercial applications today are directly associated with vast, growing industries: cellular telephones, computer local area networks (LANs), and computer wide- area networks (WANs). The rising cost of hard wiring signals in manufacturing facilities along with the significant advances in digital and communications technologies have allowed the wireless technology to emerge as an attractive and cost-effective alternative. In this paper, technical issues associated with two applications will be described in which wireless systems have been successfully developed and applied by a team from Oak Ridge National Laboratory (ORNL). These wireless applications demonstrate the technical challenges and benefits realized by wireless technologies. A more comprehensive wireless concept aimed at automating large-scale manufacturing facilities in a unified approach using wireless links will also be discussed.

  13. High Efficiency, Low EMI and Positioning Tolerant Wireless Charging...

    Office of Environmental Management (EM)

    Low EMI and Positioning Tolerant Wireless Charging of EVs 2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer...

  14. airborne emergency wireless: Topics by E-print Network

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

    for Emergency Medical Triage Finger sensor Mica2 motes transmit blood oxygen and pulse statistics PDA visualization tools allow Malan, David J. 23 Wireless sensor...

  15. Low-coherent WDM reflectometry for accurate fiber length monitoring

    E-Print Network [OSTI]

    Hui, Rongqing; Thomas, J.; Allen, Christopher Thomas; Fu, B.; Gao, S.

    2003-01-01T23:59:59.000Z

    A fiber-optic low-coherent reflectometer was developed to accurately monitor fiber length variation. A large length-coverage range was obtained by using a fiber Bragg grating array in a wavelength-division-multiplexing ...

  16. auxiliary optical fiber: Topics by E-print Network

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

    19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Fiber receptacle Collection optics Computer Technologies and Information Sciences Websites Summary: Fiber receptacle ...

  17. acontinuous fiber optic: Topics by E-print Network

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

    19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Fiber receptacle Collection optics Computer Technologies and Information Sciences Websites Summary: Fiber receptacle ...

  18. absolute fiber optic: Topics by E-print Network

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

    R S; Neto, P A Maia; Nussenzveig, H M 2014-01-01 2 Fiber receptacle Collection optics Computer Technologies and Information Sciences Websites Summary: Fiber receptacle ...

  19. advanced fiber composites: Topics by E-print Network

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

    next (more) Chen, Zheyi 2008-01-01 6 Multilayer composite photonic bandgap fibers ; Composite photonic bandgap fiber materials and fabrication . Open Access Theses and...

  20. alcohol fiber reinforced: Topics by E-print Network

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

    AND SHM OF CARBON FIBER REINFORCED POLYMER PART I : IMPEDANCE ANALYSIS-performance composite materials based on carbon fiber are increasingly used in critical security areas...

  1. Fiber Reinforced Polymer Composite Manufacturing - RFI Part 2...

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

    1056 More Documents & Publications Fiber Reinforced Polymer Composite Manufacturing Workshop Fiber Reinforced Polymer Composite Manufacturing - RFI DE-FOA-0000980: Summary of...

  2. Oak Ridge National Laboratory Carbon Fiber Technology Facility

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

    Oak Ridge National Laboratory Carbon Fiber Technology Facility Low-Cost Carbon Fiber | Proposal Guidelines Proposal Guidelines Proposals should be no more than 5 single spaced...

  3. Renewable, Low-Cost Carbon Fiber for Lightweight Vehicles: Summary...

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

    Renewable, Low-Cost Carbon Fiber for Lightweight Vehicles: Summary Report Renewable, Low-Cost Carbon Fiber for Lightweight Vehicles: Summary Report This report outlines the final...

  4. MARGINAL EXPENSE OIL WELL WIRELESS SURVEILLANCE MEOWS

    SciTech Connect (OSTI)

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

    2004-11-01T23:59:59.000Z

    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.

  5. Frameless ALOHA Protocol for Wireless Networks

    E-Print Network [OSTI]

    Stefanovic, Cedomir; Vukobratovic, Dejan

    2012-01-01T23:59:59.000Z

    We propose a novel distributed random access scheme for wireless networks based on slotted ALOHA, motivated by the analogies between successive interference cancellation and iterative belief-propagation decoding on erasure channels. The proposed scheme assumes that each user independently accesses the wireless link in each slot with a predefined probability, resulting in a distribution of user transmissions over slots. The operation bears analogy with rateless codes, both in terms of probability distributions as well as to the fact that the ALOHA frame becomes fluid and adapted to the current contention process. Our aim is to optimize the slot access probability in order to achieve rateless-like distributions, focusing both on the maximization of the resolution probability of user transmissions and the throughput of the scheme.

  6. Wireless boundary monitor system and method

    DOE Patents [OSTI]

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

    1997-12-09T23:59:59.000Z

    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.

  7. Wireless energy transfer between anisotropic metamaterials shells

    SciTech Connect (OSTI)

    Díaz-Rubio, Ana; Carbonell, Jorge; Sánchez-Dehesa, José, E-mail: jsdehesa@upv.es

    2014-06-15T23:59:59.000Z

    The behavior of strongly coupled Radial Photonic Crystals shells is investigated as a potential alternative to transfer electromagnetic energy wirelessly. These sub-wavelength resonant microstructures, which are based on anisotropic metamaterials, can produce efficient coupling phenomena due to their high quality factor. A configuration of selected constitutive parameters (permittivity and permeability) is analyzed in terms of its resonant characteristics. The coupling to loss ratio between two coupled resonators is calculated as a function of distance, the maximum (in excess of 300) is obtained when the shells are separated by three times their radius. Under practical conditions an 83% of maximum power transfer has been also estimated. -- Highlights: •Anisotropic metamaterial shells exhibit high quality factors and sub-wavelength size. •Exchange of electromagnetic energy between shells with high efficiency is analyzed. •Strong coupling is supported with high wireless transfer efficiency. •End-to-end energy transfer efficiencies higher than 83% can be predicted.

  8. Analyzing Options for Airborne Emergency Wireless Communications

    SciTech Connect (OSTI)

    Michael Schmitt; Juan Deaton; Curt Papke; Shane Cherry

    2008-03-01T23:59:59.000Z

    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.

  9. Lunar Wireless Power Transfer Feasibility Study

    SciTech Connect (OSTI)

    Sheldon Freid, et al.

    2008-06-01T23:59:59.000Z

    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.

  10. Fiber optic probe having fibers with endfaces formed for improved coupling efficiency and method using same

    DOE Patents [OSTI]

    O`Rourke, P.E.; Livingston, R.R.

    1995-03-28T23:59:59.000Z

    A fiber optic probe is disclosed for detecting scattered light, with transmitting and receiving fibers having slanted ends and bundled together to form a bevel within the tip of the probe. The probe comprises a housing with a transparent window across its tip for protecting the transmitting and receiving fibers held therein. The endfaces of the fibers are slanted, by cutting, polishing and the like, so that they lie in a plane that is not perpendicular to the longitudinal axis of the respective fiber. The fibers are held in the tip of the probe using an epoxy and oriented so that lines normal to the slanted endfaces are divergent with respect to one another. The epoxy, which is positioned substantially between the transmitting and receiving fibers, is tapered so that the transmitting fiber, the epoxy and the receiving fiber form a bevel of not more than 20 degrees. The angled fiber endfaces cause directing of the light cones toward each other, resulting in improved light coupling efficiency. A light absorber, such as carbon black, is contained in the epoxy to reduce crosstalk between the transmitting and receiving fibers. 3 figures.

  11. Fiber-optic voltage sensor with cladded fiber and evanescent wave variation detection

    DOE Patents [OSTI]

    Wood, C.B.

    1992-12-15T23:59:59.000Z

    A fiber optic voltage sensor is described which includes a source of light, a reference fiber for receiving a known percentage of the light and an electrostrictive element having terminals across which is applied, a voltage to be measured. The electrostrictive element is responsive to the applied voltage to assume an altered physical state. A measuring fiber also receives a known percentage of light from the light source and is secured about the electrostrictive element. The measuring fiber is provided with a cladding and exhibits an evanescent wave in the cladding. The measuring fiber has a known length which is altered when the electrostrictive element assumes its altered physical state. A differential sensor is provided which senses the intensity of light in both the reference fiber and the measuring fiber and provides an output indicative of the difference between the intensities. 3 figs.

  12. Fiber-optic voltage sensor with cladded fiber and evanescent wave variation detection

    DOE Patents [OSTI]

    Wood, Charles B. (Lakewood, CO)

    1992-01-01T23:59:59.000Z

    A fiber optic voltage sensor is described which includes a source of light, a reference fiber for receiving a known percentage of the light and an electrostrictive element having terminals across which is applied, a voltage to be measured. The electrostrictive element is responsive to the applied voltage to assume an altered physical state. A measuring fiber also receives a known percentage of light from the light source and is secured about the electrostrictive element. The measuring fiber is provided with a cladding and exhibits an evanescent wave in the cladding. The measuring fiber has a known length which is altered when the electrostrictive element assumes its altered physical state. A differential sensor is provided which senses the intensity of light in both the reference fiber and the measuring fiber and provides an output indicative of the difference between the intensities.

  13. Microbend fiber-optic temperature sensor

    DOE Patents [OSTI]

    Weiss, J.D.

    1995-05-30T23:59:59.000Z

    A temperature sensor is made of optical fiber into which quasi-sinusoidal microbends have been permanently introduced. In particular, the present invention includes a graded-index optical fiber directing steady light through a section of the optical fiber containing a plurality of permanent microbends. The microbend section of the optical fiber is contained in a thermally expansive sheath, attached to a thermally expansive structure, or attached to a bimetallic element undergoing temperature changes and being monitored. The microbend section is secured to the thermally expansive sheath which allows the amplitude of the microbends to decrease with temperature. The resultant increase in the optical fiber`s transmission thus allows temperature to be measured. The plural microbend section of the optical fiber is secured to the thermally expansive structure only at its ends and the microbends themselves are completely unconstrained laterally by any bonding agent to obtain maximum longitudinal temperature sensitivity. Although the permanent microbends reduce the transmission capabilities of fiber optics, the present invention utilizes this phenomenon as a transduction mechanism which is optimized to measure temperature. 5 figs.

  14. Moisture Penetration Through Optical Fiber Coatings

    E-Print Network [OSTI]

    Matthewson, M. John

    Moisture Penetration Through Optical Fiber Coatings J. L. Armstrong, M. J. Matthewson and C. R for measuring the diffusion coefficients of water vapor through optical fiber polymer coatings has been. Kurkjian #12;732 International Wire & Cable Symposium Proceedings 1998 Moisture Penetration Through Optical

  15. TRS-Fiber Optic Classifier Sensor Installation

    E-Print Network [OSTI]

    Prevedouros, Panos D.

    TRS-Fiber Optic Classifier Sensor Installation The sensor that the Traffic Recording System (TRS) uses is the Flexsense Portable Fiberoptic Sensor System by Optical Sensor Systems. This includes two is undetected by the TRS. The user must make sure that the sensors do not get bent or twisted or the fiber optic

  16. The transport properties of activated carbon fibers

    SciTech Connect (OSTI)

    di Vittorio, S.L. (Massachusetts Inst. of Tech., Cambridge, MA (USA). Dept. of Materials Science and Engineering); Dresselhaus, M.S. (Massachusetts Inst. of Tech., Cambridge, MA (USA). Dept. of Electrical Engineering and Computer Science Massachusetts Inst. of Tech., Cambridge, MA (USA). Dept. of Physics); Endo, M. (Shinshu Univ., Nagano (Japan). Dept. of Electrical Engineering); Issi, J-P.; Piraux, L.

    1990-07-01T23:59:59.000Z

    The transport properties of activated isotropic pitch-based carbon fibers with surface area 1000 m{sup 2}/g have been investigated. We report preliminary results on the electrical conductivity, the magnetoresistance, the thermal conductivity and the thermopower of these fibers as a function of temperature. Comparisons are made to transport properties of other disordered carbons. 19 refs., 4 figs.

  17. Physical layer model design for wireless networks 

    E-Print Network [OSTI]

    Yu, Yi

    2009-06-02T23:59:59.000Z

    the relationship between wireless protocol design and physical layer models, it is necessary to first comprehend the network architecture, which groups the communication functions into related and manageable layers. The journal model is IEEE Transactions... data to the network format and vice versa. It is intended to provide independence from different represen- tations of application layer data. The session layer deals with sessions and connections between applications. It manages conversations between...

  18. Hardware Accelerator for MIMO Wireless Systems

    E-Print Network [OSTI]

    Bhagawat, Pankaj

    2012-02-14T23:59:59.000Z

    of DOCTOR OF PHILOSOPHY Approved by: Chair of Committee, Gwan Choi Committee Members, Jiang Hu Rabi Mahapatra Jim Ji Head of Department, Costas Georghiades December 2011 Major Subject: Computer Engineering iii ABSTRACT Hardware Accelerator for MIMO... Wireless Systems. (December 2011) Pankaj Bhagawat, B.S., National Insitute of Technology, Tiruchirapally, India; M.S., Texas A&M University Chair of Advisory Committee: Dr. Gwan Choi Ever increasing demand for higher data rates and better Quality...

  19. Wireless Networks A Cross-layer Perspective

    E-Print Network [OSTI]

    Libre de Bruxelles, Université

    214BC Great wall built by Shih Huang-Ti Fire towers to serve as alarms 500km (Great Wall to Hsien-yang) in 2 hours Transmission bandwidth 10-4 bits/s #12;A Brief History of Wireless Claude Chappe and the semaphore Played a key role in french revolution A tower for every 20km from Lille to Paris in 1792 Part

  20. Carbon fiber manufacturing via plasma technology

    DOE Patents [OSTI]

    Paulauskas, Felix L. (Knoxville, TN); Yarborough, Kenneth D. (Oak Ridge, TN); Meek, Thomas T. (Knoxville, TN)

    2002-01-01T23:59:59.000Z

    The disclosed invention introduces a novel method of manufacturing carbon and/or graphite fibers that avoids the high costs associated with conventional carbonization processes. The method of the present invention avoids these costs by utilizing plasma technology in connection with electromagnetic radiation to produce carbon and/or graphite fibers from fully or partially stabilized carbon fiber precursors. In general, the stabilized or partially stabilized carbon fiber precursors are placed under slight tension, in an oxygen-free atmosphere, and carbonized using a plasma and electromagnetic radiation having a power input which is increased as the fibers become more carbonized and progress towards a final carbon or graphite product. In an additional step, the final carbon or graphite product may be surface treated with an oxygen-plasma treatment to enhance adhesion to matrix materials.

  1. Solar light transmission of polymer optical fibers

    SciTech Connect (OSTI)

    Tekelioglu, Murat [Mechanical Engineering Department, University of Nevada, Reno, NV 89557 (United States); Wood, Byard D. [Mechanical and Aerospace Engineering Department, Utah State University, Logan, UT 84322 (United States)

    2009-11-15T23:59:59.000Z

    Light transfer (10 m) has been shown in recent experiments that used large-core optical fibers. Theoretical models are not extensive, however, and a further correlation between the theory and experiments has not been given. In this paper, straight and bent fiber subsystem models are introduced with skew and meridional rays to predict the light transmission of POFs (plastic optical fibers). Such fibers have been realized, for example, in HSL (hybrid solar lighting) systems. The purpose of this paper is to combine the straight and bent fiber subsystems to estimate the light transmission of HSL systems. It is shown that meridional rays, for which the optical-loss parameters were estimated, better represent the experimental results compared to skew rays ({+-}5.3% vs {+-}24.7% of %-difference). Model predictions were compared with the results of a commercial software. Sensitivity analysis on the subsystems indicated the most-to-least significant parameters in light transmission. (author)

  2. Remotely readable fiber optic compass

    DOE Patents [OSTI]

    Migliori, Albert (Santa Fe, NM); Swift, Gregory W. (Los Alamos, NM); Garrett, Steven L. (Pebble Beach, CA)

    1986-01-01T23:59:59.000Z

    A remotely readable fiber optic compass. A sheet polarizer is affixed to a magnet rotatably mounted in a compass body, such that the polarizer rotates with the magnet. The optical axis of the sheet polarizer is preferably aligned with the north-south axis of the magnet. A single excitation light beam is divided into four identical beams, two of which are passed through the sheet polarizer and through two fixed polarizing sheets which have their optical axes at right angles to one another. The angle of the compass magnet with respect to a fixed axis of the compass body can be determined by measuring the ratio of the intensities of the two light beams. The remaining ambiguity as to which of the four possible quadrants the magnet is pointing to is resolved by the second pair of light beams, which are passed through the sheet polarizer at positions which are transected by two semicircular opaque strips formed on the sheet polarizer. The incoming excitation beam and the four return beams are communicated by means of optical fibers, giving a remotely readable compass which has no electrical parts.

  3. Remotely readable fiber optic compass

    DOE Patents [OSTI]

    Migliori, A.; Swift, G.W.; Garrett, S.L.

    1985-04-30T23:59:59.000Z

    A remotely readable fiber optic compass. A sheet polarizer is affixed to a magnet rotatably mounted in a compass body, such that the polarizer rotates with the magnet. The optical axis of the sheet polarizer is preferably aligned with the north-south axis of the magnet. A single excitation light beam is divided into four identical beams, two of which are passed through the sheet polarizer and through two fixed polarizing sheets which have their optical axes at right angles to one another. The angle of the compass magnet with respect to a fixed axis of the compass body can be determined by measuring the ratio of the intensities of the two light beams. The remaining ambiguity as to which of the four possible quadrants the magnet is pointing to is resolved by the second pair of light beams, which are passed through the sheet polarizer at positions which are transected by two semicircular opaque strips formed on the sheet polarizer. The incoming excitation beam and the four return beams are communicated by means of optical fibers, giving a remotely readable compass which has no electrical parts.

  4. Method for preparing polyaniline fibers

    DOE Patents [OSTI]

    Mattes, Benjamin R. (Santa Fe, NM); Wang, Hsing-Lin (Los Alamos, NM)

    2000-01-01T23:59:59.000Z

    Stable, concentrated solutions of high molecular weight polyaniline. In order to process high quality fibers and other articles possessing good mechanical properties, it is known that solution concentrations of the chosen polymer should be in the range from 15-30% (w/w). Moreover, it is desirable to use the highest molecular weight consistent with the solubility properties of the polymer. However, such solutions are inherently unstable, forming gels before processing can be achieved. The present invention describes the addition gel inhibitors (GIs) to the polymer solution, thereby permitting high concentrations (>15% (w/w)) of high molecular weight ((M.sub.w)>120,000, and (M.sub.n)>30,000) emeraldine base (EB) polyaniline to be dissolved. Secondary amines have been used for this purpose in concentrations which are small compared to those which might otherwise be used in a cosolvent role therefor. The resulting solutions are useful for generating excellent fibers, films, coatings and other objects, since the solutions are stable for significant time periods, and the GIs are present in too small concentrations to cause polymer deterioration. It is demonstrated that the GIs found to be useful do not act as cosolvents, and that gelation times of the solutions are directly proportional to the concentration of GI. In particular, there is a preferred concentration of GI, which if exceeded causes structural and electrical conductivity degradation of resulting articles. Heating of the solutions significantly improves solubility.

  5. A Software Architecture for Physical Layer Wireless Network Emulation Glenn Judd and Peter Steenkiste

    E-Print Network [OSTI]

    Steenkiste, Peter

    to understanding and improving wireless networks has been the lack of a realistic yet flexible experimental methodology. Physical layer wireless network emulation promises to achieve much of the flexibility of wirelessA Software Architecture for Physical Layer Wireless Network Emulation Glenn Judd and Peter

  6. A Wireless XML-Based Handheld Multimodal Digital Video Library Client System

    E-Print Network [OSTI]

    Lyu, Michael R.

    of wireless devices, including limitation of screen size, CPU processing power, battery and input devices

  7. Energy Efficiency of Symmetric Key Cryptographic Algorithms in Wireless Sensor Networks

    E-Print Network [OSTI]

    Heys, Howard

    Energy Efficiency of Symmetric Key Cryptographic Algorithms in Wireless Sensor Networks Xueying-- In this paper, we examine the energy efficiency of symmetric key cryptographic algorithms applied in wireless energy efficiency with a level of security suitable for wireless sensor networks. Keywords - wireless

  8. Revision 3.0, April 26, 2012 ORNL Visitor Wireless Network

    E-Print Network [OSTI]

    Pennycook, Steve

    Revision 3.0, April 26, 2012 ORNL Visitor Wireless Network As a visitor to Oak Ridge National Laboratory (ORNL), access to the ORNL wireless network is available to you in many of our buildings. To gain in this document. Logging into the ORNL Wireless Network You must log into the ORNL Wireless Network by opening

  9. Cover sheet Real-time health monitoring of historic buildings with wireless sensor networks

    E-Print Network [OSTI]

    Picco, Gian Pietro

    Cover sheet Title: Real-time health monitoring of historic buildings with wireless sensor networks of a wireless sensor network (WSN) in Torre Aquila, a 31 meter-tall medieval tower located in the city of Trento agreement. INTRODUCTION Wireless sensors and wireless sensing networks, due to their low installation cost

  10. A Framework for Distributed Key Management Schemes in Heterogeneous Wireless Sensor Networks

    E-Print Network [OSTI]

    Hu, Jiankun

    A Framework for Distributed Key Management Schemes in Heterogeneous Wireless Sensor Networks Kejie propose a framework for key management schemes in distributed wireless sensor networks with heterogeneous, the wireless sensor network can achieve higher key connectivity and higher resilience. I. INTRODUCTION Wireless

  11. Bayesian Data and Channel Joint Maximum-Likelihood Based Error Correction in Wireless Sensor Networks

    E-Print Network [OSTI]

    Jagannatham, Aditya K.

    in wireless sensor networks (WSN). The proposed algo- rithm employs the temporal correlation of the narrowband Wireless Sensor Network (WSN), Likelihood, Sphere De- coder 1. INTRODUCTION Wireless Sensor Networks (WSNBayesian Data and Channel Joint Maximum-Likelihood Based Error Correction in Wireless Sensor

  12. Joint Source Coding, Routing and Resource Allocation for Wireless Sensor Networks

    E-Print Network [OSTI]

    Yu, Wei

    Joint Source Coding, Routing and Resource Allocation for Wireless Sensor Networks Wei Yu and Jun}@comm.utoronto.ca Abstract-- This paper presents an optimization framework for a wireless sensor network in which each sensor regarded as a promising emerging application for future wireless networks. Wireless sensor networks

  13. Voice Quality Evaluation for Wireless Transmission with ROHC (extended version

    E-Print Network [OSTI]

    Reisslein, Martin

    (reduction in header and total packet size), the voice quality, and the delay jitter. Importantly, we employ1 Voice Quality Evaluation for Wireless Transmission with ROHC (extended version and software code encoded voice with ROHC over a wireless link. We first present a tutorial on voice quality evaluation. We

  14. Design of frequency synthesizers for short range wireless transceivers 

    E-Print Network [OSTI]

    Valero Lopez, Ari Yakov

    2004-09-30T23:59:59.000Z

    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...

  15. Duty-Cycle-Aware Broadcast in Wireless Sensor Networks

    E-Print Network [OSTI]

    Liu, Jiangchuan (JC)

    active and dormant states, so as to conserve energy and extend the network lifetime. Unfortunately fails to capture the uniqueness of energy-constrained wireless sensor networks. The sensor nodesDuty-Cycle-Aware Broadcast in Wireless Sensor Networks Feng Wang Jiangchuan Liu School of Computing

  16. A Context-aware Approach to Wireless Transmission Adaptation

    E-Print Network [OSTI]

    Belding-Royer, Elizabeth M.

    ebelding@cs.ucsb.edu Abstract--Recent advancements in wireless transmission have enabled networksA Context-aware Approach to Wireless Transmission Adaptation Veljko Pejovic University with a high level of physical layer flexibility. Unfortunately, these new opportunities are not harnessed

  17. An Energy-efficient Wireless Sensor Network for Precision Agriculture

    E-Print Network [OSTI]

    Kumar, Ratnesh

    An Energy-efficient Wireless Sensor Network for Precision Agriculture Herman Sahota Ratnesh Kumar and control technologies in application areas such as precision agriculture. We design MAC and Network layers for a wireless sensor network deployed for a precision agriculture application which requires periodic collection

  18. Relay Placement for Minimizing Congestion in Wireless Backbone Networks*

    E-Print Network [OSTI]

    Shayman, Mark A.

    Relay Placement for Minimizing Congestion in Wireless Backbone Networks* Abhishek Kashyap, Fangting Park MD 20742 Email: {kashyap, ftsun, shayman}@glue.umd.edu Abstract-- Wireless optical networks are being increasingly used in the backbone of hierarchical ad hoc networks. We consider the problem

  19. FLUID: Improving Throughputs in Enterprise Wireless LANs through Flexible Channelization

    E-Print Network [OSTI]

    Liblit, Ben

    the usefulness of flexible channels in the context of 802.11-based networks. Current 802.11 hardware can provideFLUID: Improving Throughputs in Enterprise Wireless LANs through Flexible Channelization Shravan for designing 802.11 wireless LANs (WLANs) using flexible channelization -- the choice of an appropriate channel

  20. Routing for Wireless Multi Hop Networks Unifying and Distinguishing Features

    E-Print Network [OSTI]

    Graham, Nick

    -to-end communication, wireless communication provides flexible deployment and use, cost reduction, mobility, network dynamic network conditions due to interference, loss of signal power with distance and freedom of mobilityRouting for Wireless Multi Hop Networks ­ Unifying and Distinguishing Features Technical Report

  1. An Integrated System Simulation Approach for Wireless Networked Control Systems

    E-Print Network [OSTI]

    Koutsoukos, Xenofon D.

    Vanderbilt University Nashville, TN, USA Abstract--Cyber-Physical Systems (CPS), such as networked control wireless networks. Accurate modeling of these communication networks is essential in the design and verification of CPS. Controller design needs to take into ac- count the wireless channel characteristics (e

  2. WIRELESS EDDY CURRENT PROBE FOR ENGINE HEALTH , B. Graubard1

    E-Print Network [OSTI]

    Dickerson, Julie A.

    WIRELESS EDDY CURRENT PROBE FOR ENGINE HEALTH MONITORING M. Reid1 , B. Graubard1 , R. J. Weber1 , J. The first prototype wireless eddy current (EC) probe for on-wing inspection was demonstrated in a F100 PW of safety significant propulsion system malfunctions. Data from 2 MHz Eddy Current probes was transmitted

  3. Virtualizing Power Cords by Wireless Power Transmission and Energy Harvesting

    E-Print Network [OSTI]

    Tentzeris, Manos

    technology can be called the virtualization of the communication line, wireless power transmissionVirtualizing Power Cords by Wireless Power Transmission and Energy Harvesting Yoshihiro Kawahara1 for the virtualization of power cords for electrical devices. The first approach is a new concept for routing electric

  4. Network Electricity Use Associated with Wireless Personal Digital Assistants

    E-Print Network [OSTI]

    Kammen, Daniel M.

    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

  5. Energy-Efficient Data Gathering in Heterogeneous Wireless Sensor Networks

    E-Print Network [OSTI]

    Cardei, Mihaela

    1 Energy-Efficient Data Gathering in Heterogeneous Wireless Sensor Networks Wael Awada and Mihaela of energy constrained wireless sensor nodes. Sensor nodes are deployed randomly to monitor a number of targets. Since targets are redundantly covered by more sensors, in order to conserve energy resources, we

  6. Implications of Power Control in Wireless Networks: A Quantitative Study

    E-Print Network [OSTI]

    Krishnamurthy, Srikanth

    Implications of Power Control in Wireless Networks: A Quantitative Study Ioannis Broustis, Jakob of power control in wireless networks can lead to two con- flicting effects. An increase- posite effects. Our primary goal in this work is to understand the implications of power control

  7. POWER CONTROL IN WIRELESS COMMUNICATIONS NETWORKS -FROM A

    E-Print Network [OSTI]

    Gustafsson, Fredrik

    POWER CONTROL IN WIRELESS COMMUNICATIONS NETWORKS - FROM A CONTROL THEORY PERSPECTIVE Fredrik of wireless cellular communications systems will be in focus and methods for transmitter power control. Relevant aspects of power control are discussed with emphasis on practical issues, using an automatic

  8. QoS Support in Multimedia Wireless Environments

    E-Print Network [OSTI]

    Xue, Yuan

    . Second, new wireless devices such as cellular phones, PDAs, laptops are emerging to assist people population. Fourth, new hardware opportunities are appearing such as multi-frequency energyS-aware and energy-efficient solutions. · The topic of resource management in wireless networks is also very broad

  9. Graphene-enabled Wireless Networks-on-Chip (Invited Paper)

    E-Print Network [OSTI]

    Politècnica de Catalunya, Universitat

    Graphene-enabled Wireless Networks-on-Chip (Invited Paper) Ignacio Llatser, Sergi Abadal, Albert,abadal,amestres,acabello}@ac.upc.edu, eduard.alarcon@upc.edu Abstract--Graphene-enabled Wireless Communications (GWC) advocate for the use of graphene-based plasmonic antennas, or graphennas, which take advantage of the plasmonic properties

  10. Energy Optimal Transmission Scheduling in Wireless Sensor Networks

    E-Print Network [OSTI]

    Koksal, Can Emre

    1 Energy Optimal Transmission Scheduling in Wireless Sensor Networks Rahul Srivastava, Student networks is energy efficient communication of time-critical data. Energy wastage can be caused by failed. INTRODUCTION Energy efficient communication is one of the key concerns in the design of wireless sensor

  11. Negotiating Multichannel Sensing and Access In Cognitive Radio Wireless Networks

    E-Print Network [OSTI]

    Islam, M. Saif

    Negotiating Multichannel Sensing and Access In Cognitive Radio Wireless Networks Hua Liu§, Bhaskar the coordination among secondary users on channel sensing strategy in cognitive wireless networks. In this problem and potentially access in a cognitive radio network? If users may have a potentially different valuation of each

  12. A Compact Wireless Charging System for Electric Vehicles

    SciTech Connect (OSTI)

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

    2013-01-01T23:59:59.000Z

    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.

  13. 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

  14. An Optimal Power Management Policy for Wireless Communication Devices

    E-Print Network [OSTI]

    1 An Optimal Power Management Policy for Wireless Communication Devices C.F. Chiasserini, E to the problem of energy consumption in wireless networks, which exploits the dynamic power management concept to return to the active state. Power management policies are typically used to control the state

  15. Dynamic Malware Attack in Energy-Constrained Mobile Wireless Networks

    E-Print Network [OSTI]

    Sarkar, Saswati

    Dynamic Malware Attack in Energy-Constrained Mobile Wireless Networks M.H.R. Khouzani, Saswati Sarkar Abstract Large scale proliferation of wireless technologies are dependent on developing reliable to the spread of self-replicating malicious codes known as malware. The malware can be used to initiate

  16. Combinatorial Design of Key Distribution Mechanisms for Wireless Sensor Networks

    E-Print Network [OSTI]

    Bystroff, Chris

    Combinatorial Design of Key Distribution Mechanisms for Wireless Sensor Networks Seyit A. C¸amtepe1 of the most challenging security issues in wireless sensor networks where sensor nodes are randomly scattered-chain sizes. 1 Introduction and Problem Definition In this work, we consider a sensor network in which sensor

  17. Combinatorial Design of Key Distribution Mechanisms for Wireless Sensor Networks

    E-Print Network [OSTI]

    Bystroff, Chris

    Combinatorial Design of Key Distribution Mechanisms for Wireless Sensor Networks Seyit A. C� amtepe of the most challenging security issues in wireless sensor networks where sensor nodes are randomly scattered­chain sizes. 1 Introduction and Problem Definition In this work, we consider a sensor network in which sensor

  18. High-resolution speech signal reconstruction in Wireless Sensor Networks

    E-Print Network [OSTI]

    Gutierrez-Osuna, Ricardo

    High-resolution speech signal reconstruction in Wireless Sensor Networks Andria Pazarloglou, Radu With the recent growth of Wireless Sensor Networks (WSNs), many advanced application areas have received sig, rgutier}@cs.tamu.edu Abstract--Data streaming is an emerging class of applica- tions for sensor networks

  19. Power Optimal Connectivity and Coverage in Wireless Sensor Networks

    E-Print Network [OSTI]

    Bystroff, Chris

    1 Power Optimal Connectivity and Coverage in Wireless Sensor Networks Metin Inanc, Malik Magdon links, there are fundamental differences between a sensor network and other wireless ad-hoc networks programming/Optimization I. INTRODUCTION This work considers a sensor network which is com- prised of a large

  20. Exploring In-Situ Sensing Irregularity in Wireless Sensor Networks

    E-Print Network [OSTI]

    Kim, Dae-Shik

    Exploring In-Situ Sensing Irregularity in Wireless Sensor Networks Joengmin Hwang, Tian He Introduction Wireless sensor networks are envisioned to support vari- ety of applications such as military network systems. Compared to the diversified solutions pro- duced for communication among sensor nodes

  1. Stimulating Cooperative Diversity in Wireless Ad Hoc Networks through Pricing

    E-Print Network [OSTI]

    Adve, Raviraj

    Stimulating Cooperative Diversity in Wireless Ad Hoc Networks through Pricing Naveen Shastry in commercial wireless ad hoc networks. For the relay, cooperation represents both a real cost of energy a pricing game that stimulates cooperation via reimbursements to the relay. Specifically, given the price

  2. Power Management for Wireless Sensor Networks Based on Energy Budgets

    E-Print Network [OSTI]

    Turau, Volker

    Power Management for Wireless Sensor Networks Based on Energy Budgets Christian Renner Institute with wireless sensor networks powered by energy-harvesting supplies. We introduce the concept of an energy budget, the amount of energy available to a sensor node for a given period of time. The presented tools

  3. Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking

    E-Print Network [OSTI]

    Roy, Sumit

    among contending flows that share this link by solving a linear programming (LP) problem. A thorough Assignment for Multi-Radio Wireless Mesh Networks Fei Ye,1 Sumit Roy,1 and Zhisheng Niu2 1 University, provided the original work is properly cited. We investigate channel assignment for a multichannel wireless

  4. Energy-Efficient Capacity Optimization in Wireless Networks

    E-Print Network [OSTI]

    Wang, Yu

    Energy-Efficient Capacity Optimization in Wireless Networks Lu Liu, Xianghui Cao, Yu Cheng, Lili Du capacity in the most energy-efficient manner over a general large-scale wireless network, say, a multi numerical results demonstrate the energy efficiency improvement by the proposed energy-efficient

  5. Graphene-enabled Wireless Communication for Massive Multicore Architectures

    E-Print Network [OSTI]

    Cabellos-Aparicio, Albert

    Graphene-enabled Wireless Communication for Massive Multicore Architectures Sergi Abadal, Eduard. This goal is feasible by using graphene-based planar antennas, which can radiate signals at the Terahertz, this is the first work that discusses the utilization of graphene-enabled wireless communication for massive

  6. A Realistic Power Consumption Model for Wireless Sensor Network Devices

    E-Print Network [OSTI]

    Hempstead, Mark

    . Recent analyses of WSN energy efficiency have been widely based on a sensor node power consumption model1 A Realistic Power Consumption Model for Wireless Sensor Network Devices Qin Wang, Mark Hempstead}@eecs.harvard.edu Abstract-- A realistic power consumption model of wireless communication subsystems typically used in many

  7. An Information-sharing Architecture for Wireless Sensor Networks

    E-Print Network [OSTI]

    Heinzelman, Wendi

    1 An Information-sharing Architecture for Wireless Sensor Networks Christophe J. Merlin and Wendi B. Heinzelman Department of Electrical and Computer Engineering, University of Rochester, Rochester NY {merlin for a unifying wireless sensor networks archi- tecture that provides more integration than the standard layered

  8. OPTIMIZING TRANSMISSION FOR WIRELESS VIDEO STREAMING Mei-Hsuan Lu

    E-Print Network [OSTI]

    Chen, Tsuhan

    , wireless multimedia transmission has grown dramatically in recent years. The simplicity, flexibilityOPTIMIZING TRANSMISSION FOR WIRELESS VIDEO STREAMING Mei-Hsuan Lu A DISSERTATION Submitted to the Department of Electrical and Computer Engineering of Carnegie Mellon University in partial fulfillment

  9. Sequence-Based Localization in Wireless Sensor Networks

    E-Print Network [OSTI]

    Krishnamachari, Bhaskar

    Sequence-Based Localization in Wireless Sensor Networks Kiran Yedavalli and Bhaskar Krishnamachari Abstract--We introduce a novel sequence-based localization technique for wireless sensor networks. We show that the localization space can be divided into distinct regions that can each be uniquely identified by sequences

  10. Wireless Power Transmission: An Obscure History, Possibly a Bright Future.

    E-Print Network [OSTI]

    La Rosa, Andres H.

    of living. All of these trends point to an energy demand that will grow at even a larger rate. Wireless of its own. Figure 1. Projected yearly growth in world energy consumption. (3) 2 #12;History of Wireless the use of microwaves because of the economic and energy efficiency that can be leveraged by products

  11. Energy Consumption in Coded Queues for Wireless Information Exchange

    E-Print Network [OSTI]

    Boucherie, Richard J.

    Energy Consumption in Coded Queues for Wireless Information Exchange Jasper Goseling, Richard J customers. We use this relation to ob- tain bounds on the energy consumption in a wireless information, for example, from the observations in [3] that using network coding can reduce the energy consumption

  12. Dynamic Key Ring Update Mechanism for Mobile Wireless Sensor Networks

    E-Print Network [OSTI]

    Yanikoglu, Berrin

    @sabanciuniv.edu Abstract--Key distribution is an important issue to provide security in Wireless Sensor Networks (WSNs. For the performance evaluation basis, we used our mechanism together with a location based key pre-distribution scheme Terms--mobile wireless sensor networks, key ring update, security, resiliency, connectivity I

  13. Flexible network wireless transceiver and flexible network telemetry transceiver

    DOE Patents [OSTI]

    Brown, Kenneth D. (Grain Valley, MO)

    2008-08-05T23:59:59.000Z

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

  14. Connecting to UofT Wireless with Windows XP 1. Before you can use the UofT wireless network, you must verify your UTORid (you will only need

    E-Print Network [OSTI]

    Boonstra, Rudy

    Connecting to UofT Wireless with Windows XP 1. Before you can use the UofT wireless network, you will have problems logging in to the UofT wireless network. There will be a short delay between verifying and being able to access UofT wireless network. 3. Click on the wireless network icon in the bottom right

  15. Microbend fiber-optic temperature sensor

    DOE Patents [OSTI]

    Weiss, Jonathan D. (Albuquerque, NM)

    1995-01-01T23:59:59.000Z

    A temperature sensor is made of optical fiber into which quasi-sinusoidal microbends have been permanently introduced. In particular, the present invention includes a graded-index optical fiber directing steady light through a section of the optical fiber containing a plurality of permanent microbends. The microbend section of the optical fiber is contained in a thermally expansive sheath, attached to a thermally expansive structure, or attached to a bimetallic element undergoing temperature changes and being monitored. The microbend section is secured to the thermally expansive sheath which allows the amplitude of the microbends to decrease with temperature. The resultant increase in the optical fiber's transmission thus allows temperature to be measured. The plural microbend section of the optical fiber is secured to the thermally expansive structure only at its ends and the microbends themselves are completely unconstrained laterally by any bonding agent to obtain maximum longitudinal temperature sensitivity. Although the permanent microbends reduce the transmission capabilities of fiber optics, the present invention utilizes this phenomenon as a transduction mechanism which is optimized to measure temperature.

  16. UltraUltra--Wideband (UWB)Wideband (UWB) Wireless CommunicationsWireless Communications

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    Devices Home Network DevicesHome Network Devices PC Enterprise Business MarketPC Enterprise Business----ChallengeChallenge ConclusionConclusion #12;Robert Qiu TTU 3 Mobile Devices MarketMobile Devices Market SegmentationSegmentation Nokia 3330 Add-On Devices Business / Smart Phones Basic Phones Data Devices w/ Integral Wireless Modules

  17. Design and Characterization of a Novel Battery-less, Solar Powered Wireless Tag for Enhanced-Range

    E-Print Network [OSTI]

    Tentzeris, Manos

    Design and Characterization of a Novel Battery-less, Solar Powered Wireless Tag for Enhanced.Vyas@gatech.edu Abstract-- In this paper, a novel wireless "Battery-less Solar Powered Wireless Tag" with an enhanced range" and "ubiquitous wireless networks". This paper introduces a novel battery-less solar powered wireless tag

  18. 2 micron femtosecond fiber laser

    DOE Patents [OSTI]

    Liu, Jian; Wan, Peng; Yang, Lihmei

    2014-07-29T23:59:59.000Z

    Methods and systems for generating femtosecond fiber laser pulses are disclose, including generating a signal laser pulse from a seed laser oscillator; using a first amplifier stage comprising an input and an output, wherein the signal laser pulse is coupled into the input of the first stage amplifier and the output of the first amplifier stage emits an amplified and stretched signal laser pulse; using an amplifier chain comprising an input and an output, wherein the amplified and stretched signal laser pulse from the output of the first amplifier stage is coupled into the input of the amplifier chain and the output of the amplifier chain emits a further amplified, stretched signal laser pulse. Other embodiments are described and claimed.

  19. Fiber optic D dimer biosensor

    DOE Patents [OSTI]

    Glass, R.S.; Grant, S.A.

    1999-08-17T23:59:59.000Z

    A fiber optic sensor for D dimer (a fibrinolytic product) can be used in vivo (e.g., in catheter-based procedures) for the diagnosis and treatment of stroke-related conditions in humans. Stroke is the third leading cause of death in the United States. It has been estimated that strokes and stroke-related disorders cost Americans between $15-30 billion annually. Relatively recently, new medical procedures have been developed for the treatment of stroke. These endovascular procedures rely upon the use of microcatheters. These procedures could be facilitated with this sensor for D dimer integrated with a microcatheter for the diagnosis of clot type, and as an indicator of the effectiveness, or end-point of thrombolytic therapy. 4 figs.

  20. Coated Fiber Neutron Detector Test

    SciTech Connect (OSTI)

    Lintereur, Azaree T.; Ely, James H.; Kouzes, Richard T.; Stromswold, David C.

    2009-10-23T23:59:59.000Z

    Radiation portal monitors used for interdiction of illicit materials at borders include highly sensitive neutron detection systems. The main reason for having neutron detection capability is to detect fission neutrons from plutonium. The currently deployed radiation portal monitors (RPMs) from Ludlum and Science Applications International Corporation (SAIC) use neutron detectors based upon 3He-filled gas proportional counters, which are the most common large neutron detector. There is a declining supply of 3He in the world, and thus, methods to reduce the use of this gas in RPMs with minimal changes to the current system designs and sensitivity to cargo-borne neutrons are being investigated. Reported here are the results of tests of the 6Li/ZnS(Ag)-coated non-scintillating plastic fibers option. This testing measured the required performance for neutron detection efficiency and gamma ray rejection capabilities of a system manufactured by Innovative American Technology (IAT).