National Library of Energy BETA

Sample records for lunar wireless power

  1. Lunar Wireless Power Transfer Feasibility Study

    SciTech Connect (OSTI)

    Sheldon Freid, et al.

    2008-06-01

    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.

  2. Wireless adiabatic power transfer

    SciTech Connect (OSTI)

    Rangelov, A.A., E-mail: rangelov@phys.uni-sofia.bg [Department of Physics, Sofia University, James Bourchier 5 blvd., 1164 Sofia (Bulgaria); Suchowski, H.; Silberberg, Y. [Department of Physics of Complex System, Weizmann Institute of Science, Rehovot 76100 (Israel); Vitanov, N.V. [Department of Physics, Sofia University, James Bourchier 5 blvd., 1164 Sofia (Bulgaria)

    2011-03-15

    Research Highlights: > Efficient and robust mid-range wireless energy transfer between two coils. > The adiabatic energy transfer is analogous to adiabatic passage in quantum optics. > Wireless energy transfer is insensitive to any resonant constraints. > Wireless energy transfer is insensitive to noise in the neighborhood of the coils. - Abstract: We propose a technique for efficient mid-range wireless power transfer between two coils, by adapting the process of adiabatic passage for a coherently driven two-state quantum system to the realm of wireless energy transfer. The proposed technique is shown to be robust to noise, resonant constraints, and other interferences that exist in the neighborhood of the coils.

  3. Wireless adiabatic power transfer

    E-Print Network [OSTI]

    A. A. Rangelov; H. Suchowski; Y. Silberberg; N. V. Vitanov

    2010-10-30

    We propose a technique for efficient mid-range wireless power transfer between two coils, by adapting the process of adiabatic passage for a coherently driven two-state quantum system to the realm of wireless energy transfer. The proposed technique is shown to be robust to noise, resonant constraints, and other interferences that exist in the neighborhood of the coils.

  4. Wireless Power Transmission

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnicalInformation4563 LLNL Small-scale Friction Sensitivityv b W r88 Lunar Wireless

  5. Wireless Power Transfer

    ScienceCinema (OSTI)

    None

    2013-11-19

    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

  6. Wireless Power Transfer

    SciTech Connect (OSTI)

    2013-07-22

    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. Solar-Powered Smart Wireless Camera Network for Outdoor Monitoring

    E-Print Network [OSTI]

    Abas, Kevin Mathys

    2015-01-01

    2 Related Work Wireless Smart Cameras . . . . . .Solar-Powered Wireless Visual SensorOther Embedded Wireless Protocols . . . . . . . . . . . . .

  8. Wireless transfer of electric power

    E-Print Network [OSTI]

    Moffatt, Robert Alexander

    2009-01-01

    In this dissertation, I describe the design and construction of a system which can transfer electric power wirelessly. This is accomplished using inductive, near-field, non-radiative coupling between self-resonant copper ...

  9. 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

  10. Power Allocation and Spectrum Sharing in Wireless

    E-Print Network [OSTI]

    Teneketzis, Demosthenis

    Power Allocation and Spectrum Sharing in Wireless Networks: An Implementation Theory Approach Ali problems that arise in wireless communication networks. 1.1 Chapter Organization The chapter is organized

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

    E-Print Network [OSTI]

    Tentzeris, Manos

    existing wireless power transfer scheme, this method can deliver electric power over a wide range, there is a general need to remove the electrical cords from rooms at low cost. If the wireless communication different methods. The first approach routes electric power by wireless transfer on two-dimensional surfaces

  12. Wireless Technologies Implications for Power Systems

    SciTech Connect (OSTI)

    Fuhr, Peter L; Manges, Wayne W; Schweitzer, Patrick; Kagan, Hesh

    2010-01-01

    Wireless technologies have advanced well beyond simple SCADA radio systems and point-to-point links. The current applications supported by industrial-grade wireless sensors and systems range from field measurements (classic I/O) to voice, video, asset tracking, mobile operators, etc. Which such a wide array of supported applications, the belief that wireless technology will only impact power systems in terms of wireless sensors is shortsighted. This paper, coauthored by a group of individuals intimately involved in the general realm of industrial wireless , presents a simple snapshot of current radio technologies that are used (or seriously contemplated for use) in power systems.

  13. Wireless power transmission for medical applications

    E-Print Network [OSTI]

    Payne, Joshua E.

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

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

    E-Print Network [OSTI]

    Abas, Kevin Mathys

    2015-01-01

    ZigbeeAlliance. The wireless zigbee standard specifications,2014. http:// zigbee.org/zigbee-for-developers/network-Sima Noghanian. Solar-powered zigbee-based wireless mo- tion

  15. 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

  16. 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

  17. The Power of Non-Uniform Wireless Power

    E-Print Network [OSTI]

    The Power of Non-Uniform Wireless Power ETH Zurich ­ Distributed Computing Group Magnus M-To-Interference-Plus-Noise Ratio (SINR) Formula Minimum signal- to-interference ratio Power level of sender u Path-loss exponent Noise Distance between two nodes Received signal power from sender Received signal power from all other

  18. Using Wireless Power Meters to Measure Energy Use of Miscellaneous and Electronic Devices in Buildings

    E-Print Network [OSTI]

    Brown, Richard

    2012-01-01

    a High-Fidelity Wireless Building Energy Auditing Network.Using Wireless Power Meters to Measure Energy Use ofUsing Wireless Power Meters to Measure Energy Miscellaneous

  19. Using Wireless Power Meters to Measure Energy Use of Miscellaneous and Electronic Devices in Buildings

    E-Print Network [OSTI]

    Brown, Richard

    2012-01-01

    with a High-Fidelity Wireless Building Energy AuditingN ATIONAL L ABORATORY Using Wireless Power Meters to Measureopportunity employer. Using Wireless Power Meters to Measure

  20. Envelope amplifier design for wireless base-station power amplifiers

    E-Print Network [OSTI]

    Hsia, Chin

    2010-01-01

    Base Station Power Amplifiers . . . . . . . . . . . .for High Efficiency Bbase Station Power Amplifiers,” in IEEEfor Wireless Base-Station Power Amplifiers A dissertation

  1. Reference reactor module for NASA's lunar surface fission power system

    SciTech Connect (OSTI)

    Poston, David I; Kapernick, Richard J; Dixon, David D; Werner, James; Qualls, Louis; Radel, Ross

    2009-01-01

    Surface fission power systems on the Moon and Mars may provide the first US application of fission reactor technology in space since 1965. The Affordable Fission Surface Power System (AFSPS) study was completed by NASA/DOE to determine the cost of a modest performance, low-technical risk surface power system. The AFSPS concept is now being further developed within the Fission Surface Power (FSP) Project, which is a near-term technology program to demonstrate system-level TRL-6 by 2013. This paper describes the reference FSP reactor module concept, which is designed to provide a net power of 40 kWe for 8 years on the lunar surface; note, the system has been designed with technologies that are fully compatible with a Martian surface application. The reactor concept uses stainless-steel based. UO{sub 2}-fueled, pumped-NaK fission reactor coupled to free-piston Stirling converters. The reactor shielding approach utilizes both in-situ and launched shielding to keep the dose to astronauts much lower than the natural background radiation on the lunar surface. The ultimate goal of this work is to provide a 'workhorse' power system that NASA can utilize in near-term and future Lunar and Martian mission architectures, with the eventual capability to evolve to very high power, low mass systems, for either surface, deep space, and/or orbital missions.

  2. 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

  3. 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, Andrew Hillenius and David S. Ricketts Electrical & Computer Engineering, Carnegie Mellon University, Pittsburgh, PA 15213 Abstract-- In this paper we report on a resonant wireless power delivery system using

  4. Transmission Power Management for Wireless Health Applications

    E-Print Network [OSTI]

    Amini, Navid

    2012-01-01

    J. Kaiser, “Microleap: Energy-aware wireless sensor platformError through Energy-Efficient Wireless Sensor Networks,”metrics in energy constrained wireless sensor networks,

  5. 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

  6. Power-Efficient Adaptable Wireless Sensor Networks , David Evans2

    E-Print Network [OSTI]

    Evans, David

    Power-Efficient Adaptable Wireless Sensor Networks John Lach1 , David Evans2 , Jon McCune3 , Jason the flexibility necessary for the adaptations required of wireless sensor networks without the penalties Engineering3 , Pittsburgh, PA 15213 Abstract Wireless sensor networks represent a new data collection paradigm

  7. Wirelessly-Powered Wireless Sensor Platform T. Paing, J. Morroni, A. Dolgov, J. Shin, J. Brannan, R. Zane, Z. Popovic

    E-Print Network [OSTI]

    Wirelessly-Powered Wireless Sensor Platform T. Paing, J. Morroni, A. Dolgov, J. Shin, J. Brannan, R-power (~10W) 2.45-GHz wireless sensor platform consisting of a three-axis accelerometer, thermometer and skin conductivity sensor. The sensor is powered wirelessly from a distance of around 3-4m with narrowband 2.45-GHz

  8. Optimal Quarantining of Wireless Malware Through Power Control

    E-Print Network [OSTI]

    Sarkar, Saswati

    Optimal Quarantining of Wireless Malware Through Power Control M. H. R. Khouzani School devices such as cellphones, smartphones and pocket-PCs are acquiring more computation and communication

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

    E-Print Network [OSTI]

    Abas, Kevin Mathys

    2015-01-01

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

  10. 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- layer information from higher network layers may be utilized for more efficient power management that fine- tune transmission power according to information received from the transport (feedback reports

  11. Using Wireless Power Meters to Measure Energy Use of Miscellaneous and Electronic Devices in Buildings

    E-Print Network [OSTI]

    Brown, Richard

    2012-01-01

    a High-Fidelity Wireless Building Energy Auditing Network.energy and power data using small, relatively inexpensive wirelessUsing Wireless Power Meters to Measure Energy Use of

  12. 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

  13. A Battery-less, Wireless Mote for Scavenging Wireless Power at UHF (470-570 MHz) Frequencies

    E-Print Network [OSTI]

    Tentzeris, Manos

    A Battery-less, Wireless Mote for Scavenging Wireless Power at UHF (470-570 MHz) Frequencies Rushi Vyas*, Vasileios Lakafosis, Dr. Manos Tentzeris School of Electrical and Computer Engineering, Georgia@akg.t.u-tokyo.ac.jp Abstract--In this paper, a novel power scavenging mote to harness wireless power in the UHF frequencies

  14. Space reactor/Stirling cycle systems for high power Lunar applications

    SciTech Connect (OSTI)

    Schmitz, P.D.; Mason, L.S.

    1994-09-01

    NASA`s Space Exploration Initiative (SEI) has proposed the use of high power nuclear power systems on the lunar surface as a necessary alternative to solar power. Because of the long lunar night ({approximately} 14 earth days) solar powered systems with the requisite energy storage in the form of regenerative fuel cells or batteries becomes prohibitively heavy at high power levels ({approximately} 100 kWe). At these high power levels nuclear power systems become an enabling technology for variety of missions. One way of producing power on the lunar surface is with an SP-100 class reactor coupled with Stirling power converters. In this study, analysis and characterization of the SP-100 class reactor coupled with Free Piston Stirling Power Conversion (FPSPC) system will be performed. Comparison of results with previous studies of other systems, particularly Brayton and Thermionic, are made.

  15. Lifetime Prediction for Supercapacitor-powered Wireless Sensor Nodes

    E-Print Network [OSTI]

    Turau, Volker

    with a prediction of future incoming energy, e.g., obtained from a solar cell. II. RELATED WORK Several approachesLifetime Prediction for Supercapacitor-powered Wireless Sensor Nodes Christian Renner, J research direction for wireless sensor networks. It depends on accurate models for lifetime prediction

  16. Low Power Adaptive Equaliser Architectures for Wireless LMMSE Receivers 

    E-Print Network [OSTI]

    Tennant, Mark P

    2007-01-01

    Power consumption requires critical consideration during system design for portable wireless communication devices as it has a direct influence on the battery weight and volume required for operation. Wideband Code ...

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

    E-Print Network [OSTI]

    Turau, Volker

    . The usage of batteries in wireless sensor networks is primarily due to avoiding the wiring cost, i.e., data sources do not continuously provide energy. Consider a solar cell as an example. The power generated

  18. Adaptive primary side control for a wireless power transfer optimization

    E-Print Network [OSTI]

    Bogoda, Thilani Imanthika Dissanayake

    2012-01-01

    A resonant inductive wireless power transfer system, consisting of a primary (transmitter) circuit and secondary (receiver) circuit, was designed and implemented. This document also contains a novel indirect feedback method ...

  19. Low Power Filtering Techniques for Wideband and Wireless Applications 

    E-Print Network [OSTI]

    Gambhir, Manisha

    2010-10-12

    This dissertation presents design and implementation of continuous time analog filters for two specific applications: wideband analog systems such as disk drive channel and low-power wireless applications. Specific focus has been techniques...

  20. Wireless power transmission utilizing a phased array of Tesla coils

    E-Print Network [OSTI]

    Stark, Joseph C. (Joseph Charles), 1980-

    2004-01-01

    This thesis discusses the theory and design of coupled resonant systems and how they can be linked in a phased array for the wireless transmission of electrical power. A detailed derivation of their operational theory is ...

  1. A Basic LEGO Reactor Design for the Provision of Lunar Surface Power

    SciTech Connect (OSTI)

    John Darrell Bess

    2008-06-01

    A final design has been established for a basic Lunar Evolutionary Growth-Optimized (LEGO) Reactor using current and near-term technologies. The LEGO Reactor is a modular, fast-fission, heatpipe-cooled, clustered-reactor system for lunar-surface power generation. The reactor is divided into subcritical units that can be safely launched with lunar shipments from Earth, and then emplaced directly into holes drilled into the lunar regolith to form a critical reactor assembly. The regolith would not just provide radiation shielding, but serve as neutron-reflector material as well. The reactor subunits are to be manufactured using proven and tested materials for use in radiation environments, such as uranium-dioxide fuel, stainless-steel cladding and structural support, and liquid-sodium heatpipes. The LEGO Reactor system promotes reliability, safety, and ease of manufacture and testing at the cost of an increase in launch mass per overall rated power level and a reduction in neutron economy when compared to a single-reactor system. A single unshielded LEGO Reactor subunit has an estimated mass of approximately 448 kg and provides approximately 5 kWe. The overall envelope for a single subunit with fully extended radiator panels has a height of 8.77 m and a diameter of 0.50 m. Six subunits could provide sufficient power generation throughout the initial stages of establishing a lunar outpost. Portions of the reactor may be neutronically decoupled to allow for reduced power production during unmanned periods of base operations. During later stages of lunar-base development, additional subunits may be emplaced and coupled into the existing LEGO Reactor network, subject to lunar base power demand. Improvements in reactor control methods, fuel form and matrix, shielding, as well as power conversion and heat rejection techniques can help generate an even more competitive LEGO Reactor design. Further modifications in the design could provide power generative opportunities for use on other extraterrestrial surfaces.

  2. Empirical Analysis of Transmission Power Control Algorithms for Wireless

    E-Print Network [OSTI]

    California at Berkeley, University of

    Empirical Analysis of Transmission Power Control Algorithms for Wireless Sensor Networks CENTS sensor network testbed. #12;Related Work · Some number of works tried to adjust radio transmission power command in WSN. · Many-to-one · In-network processing. #12;Index · Description of transmission power

  3. Simulation of a Wireless Power Transfer System for Electric Vehicles with Power Factor Correction

    SciTech Connect (OSTI)

    Pickelsimer, Michael C [ORNL; Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL; Miller, John M [ORNL

    2012-01-01

    Wireless power transfer has been a popular topic of recent research. Most research has been done to address the limitations of coil-to-coil efficiency. However, little has been done to address the problem associated with the low input power factor with which the systems operate. This paper details the steps taken to analyze a wireless power transfer system from the view of the power grid under a variety of loading conditions with and without power factor correction.

  4. Self-powered wireless sensor system using MEMS piezoelectric micro power generator (PMPG)

    E-Print Network [OSTI]

    Xia, YuXin, M.B.A. Sloan School of Management.

    2006-01-01

    A thin-film lead zirconate titanate, Pb(Zr,Ti)03, MEMS Piezoelectric Micro Power Generator (PMPG) has been integrated with a commercial wireless sensor node (Telos), to demonstrate a self-powered RF temperature sensor ...

  5. Simultaneous Routing and Power Allocation in CDMA Wireless Data Networks

    E-Print Network [OSTI]

    and increasing function of the communica- tions resources allocated the link (this assumption holds for TDMASimultaneous Routing and Power Allocation in CDMA Wireless Data Networks Mikael Johansson* , Lin, in turn, are determined by the allocation of transmit powers across the network. Thus, the optimal network

  6. Efficiently Operating Wireless Nodes Powered by Renewable Energy Sources

    E-Print Network [OSTI]

    Gautam, Natarajan

    1 Efficiently Operating Wireless Nodes Powered by Renewable Energy Sources Natarajan Gautam Senior. The node uses energy harvesting in the sense that it is powered by batteries that are charged by renewable that is responsible for transmitting messages in a timely manner while being prudent about energy consumption

  7. Wirelessly-Powered Wireless Sensor Platform T. Paing, J. Morroni, A. Dolgov, J. Shin, J. Brannan, R. Zane, Z. Popovic

    E-Print Network [OSTI]

    Popovic, Zoya

    , providing DC power to the sensor and associated electronics. The data transmission and powering can be the powering function to be independent of the wireless transmission and sensor data gathering. The sensor. The sensor and wireless transmission is also controlled through this device. The goal of this paper

  8. Power Optimization of Wireless Media Systems with Space-Time Code Building

    E-Print Network [OSTI]

    Yousefi'zadeh, Homayoun

    between the power consumption and the quality of service in wireless media systems. Fig. 1 includes1 Power Optimization of Wireless Media Systems with Space-Time Code Building Blocks Homayoun solution to the problem of power control in wireless media systems with multiple transmit antennas. We

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

    E-Print Network [OSTI]

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

  10. The Power of Non-Uniform Wireless Power Magnus M. Halldorsson

    E-Print Network [OSTI]

    The Power of Non-Uniform Wireless Power Magn´us M. Halld´orsson Stephan Holzer Pradipta Mitra Roger model when power control is available. This measure characterizes the effectiveness of using oblivious power -- when the power used by a transmitter only depends on the distance to the receiver

  11. A Survey of Wireless Communications for the Electric Power System

    SciTech Connect (OSTI)

    Akyol, Bora A.; Kirkham, Harold; Clements, Samuel L.; Hadley, Mark D.

    2010-01-27

    A key mission of the U.S. Department of Energy (DOE) Office of Electricity Delivery and Energy Reliability (OE) is to enhance the security and reliability of the nation’s energy infrastructure. Improving the security of control systems, which enable the automated control of our energy production and distribution, is critical for protecting the energy infrastructure and the integral function that it serves in our lives. The DOE-OE Control Systems Security Program provides research and development to help the energy industry actively pursue advanced security solutions for control systems. The focus of this report is analyzing how, where, and what type of wireless communications are suitable for deployment in the electric power system and to inform implementers of their options in wireless technologies. The discussions in this report are applicable to enhancing both the communications infrastructure of the current electric power system and new smart system deployments. The work described in this report includes a survey of the following wireless technologies: • IEEE 802.16 d and e (WiMAX) • IEEE 802.11 (Wi-Fi) family of a, b, g, n, and s • Wireless sensor protocols that use parts of the IEEE 802.15.4 specification: WirelessHART, International Society of Automation (ISA) 100.11a, and Zigbee • The 2, 3, and 4 generation (G )cellular technologies of GPRS/EDGE/1xRTT, HSPA/EVDO, and Long-Term Evolution (LTE)/HSPA+UMTS.

  12. Throughput Maximization in Wireless Powered Communication Networks with Energy Saving

    E-Print Network [OSTI]

    Brown III, Donald R.

    Throughput Maximization in Wireless Powered Communication Networks with Energy Saving Rui Wang, D and energy allocation to maximize the sum throughput for the case when the nodes can save energy for later with energy saving provides improved sum throughput increasing with the number of transmission blocks. Index

  13. On the Power of Uniform Power: Capacity of Wireless Networks with Bounded

    E-Print Network [OSTI]

    On the Power of Uniform Power: Capacity of Wireless Networks with Bounded Resources Chen Avin1-case performance of uniform and non-uniform power assignments differ under constraints such as a bound on the area where nodes are distributed or restrictions on the maximum power available. We determine the maximum

  14. Wireless Neural Signal Acquisition with Single Low-Power Integrated Circuit

    E-Print Network [OSTI]

    Shenoy, Krishna V.

    Wireless Neural Signal Acquisition with Single Low-Power Integrated Circuit Reid R. Harrison Ryan J for wireless neural recording applications. The chip, which was fabricated in a 0.6-µm 2P3M BiCMOS process are sampled by the ADC at 15.7 kSps and telemetered over the FSK wireless data link. Power, clock, and command

  15. Power Scheduling for Multi-Hop Wireless Networks

    E-Print Network [OSTI]

    Yu, Yuan

    2009-01-01

    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

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

    E-Print Network [OSTI]

    Abas, Kevin Mathys

    2015-01-01

    Sensorcam: An energy-efficient smart wireless camera forthe accuracy-latency-energy tradeoff for wireless embeddedand energy harvesting techniques for wireless sensor nodes.

  17. Power Scheduling for Multi-Hop Wireless Networks

    E-Print Network [OSTI]

    Yu, Yuan

    2009-01-01

    a large network of wireless routers,” IEEE Transactions onas a router to relay messages for its neighbors. A wireless

  18. Network Assisted Power Control 1 6/15/00 Network Assisted Power Control for Wireless Data

    E-Print Network [OSTI]

    Mandayam, Narayan

    system quality and efficiency. In recent we have applied microeconomic theories to power control taking The quality and bandwidth efficiency of wireless communications systems depend on effective power control telephone systems the technical community devoted considerable effort to devising power control schemes

  19. : Joint Optimization of Charger Placement and Power Allocation for Wireless Power Transfer

    E-Print Network [OSTI]

    Wu, Jie

    , the energy-hungry battery-powered devices. It enables energy to be wirelessly transmitted from power chargers the lifetime of, and thus enhance the usability of, these battery-powered devices, solutions from different per- spectives have been proposed, including energy harvesting [1], energy conservation [2], and battery

  20. IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 63, NO. 5, MAY 2015 1607 Wireless-Powered Relays in Cooperative

    E-Print Network [OSTI]

    Durrani, Salman

    energy harvesting. I. INTRODUCTION RADIO frequency (RF) or wireless energy harvesting has recently emerged as an attractive solution to power nodes in future wireless networks [2]­[6]. Wireless energy-power electronic applications [7]. The feasibility of wireless energy harvesting for low-power cellular

  1. DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS

    SciTech Connect (OSTI)

    Paul Tubel

    2003-03-24

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

  2. Nuclear power systems for Lunar and Mars exploration

    SciTech Connect (OSTI)

    Sovie, R.J.; Bozek, J.M.

    1994-09-01

    Initial studies of a variety of mission scenarios for the new Space Exploration Initiative, and the technologies necessary to enable or significantly enhance them, have identified the development of advanced space power systems - whether solar, chemical or nuclear - to be of prime importance. Lightweight, compact, reliable power systems for planetary rovers and a variety of surface vehicles, utility surface power, and power for advanced propulsion systems were identified as critical needs for these missions. This paper discusses these mission scenarios, the concomitant power system requirements; the power system options considered and identifies the significant potential benefits of nuclear power for meeting the power needs of the above applications.

  3. Transmission Power Management for Wireless Health Applications

    E-Print Network [OSTI]

    Amini, Navid

    2012-01-01

    Experimental Analysis of RF Transmission Characteristics foroptimal low-energy transmission strategy for ieee 802.11a/h.Distributed algorithms for transmission power control in

  4. ANEWFRAMEWORK FOR POWER CONTROL IN WIRELESS DATA NETWORKS: GAMES, UTILITY, AND PRICING

    E-Print Network [OSTI]

    Mandayam, Narayan

    David Famolari Wireless Information Network Laboratory (WINLAB) Dept. of Electrical and Computer@winlab.rutgers.edu David Goodman Wireless Information Network Laboratory (WINLAB) Dept. of Electrical and ComputerChapter 1 ANEWFRAMEWORK FOR POWER CONTROL IN WIRELESS DATA NETWORKS: GAMES, UTILITY, AND PRICING

  5. DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS

    SciTech Connect (OSTI)

    Paul Tubel

    2003-07-05

    The third quarter of the project was dedicated to creating the detailed design for the manufacturing of the mechanical system for wireless communications and the power generation module. Another emphasis for the quarter was the development of the surface system and acoustic detector for the downhole tool for 2 way communications. The tasks accomplished during this report period were: (1) All detailed drawings for manufacturing of the wireless communications gauge and power generator were completed and the drawings were forward to a machine shop for manufacturing. (2) The power generator was incorporated to the mandrel of the wireless gauge reducing the length of the tool by 25% and manufacturing cost by about 35%. (3) The new piezoelectric acoustic generator was manufactured successfully and it was delivered during this quarter. The assembly provides a new technique to manufacture large diameter piezoelectric based acoustic generators. (4) The acoustic two-way communications development progressed significantly. The real time firmware for the surface system was developed and the processor was able to detect and process the data frame transmitted from downhole. The analog section of the tool was also developed and it is being tested for filtering capabilities and signal detection and amplification. (5) The new transformer to drive the piezoelectric wafer assembly was designed and manufactured. The transformer has been received and it will go through testing and evaluation during the next quarter.

  6. Transmission Power Management for Wireless Health Applications

    E-Print Network [OSTI]

    Amini, Navid

    2012-01-01

    of an End Device in a ZigBee Mesh Network,” University ofis remarkably lighter than ZigBee. IV) And the power-supplyThe XBee-Pro also includes ZigBee features, allowing for

  7. Advanced Wireless Power Transfer Vehicle and Infrastructure Analysis (Presentation)

    SciTech Connect (OSTI)

    Gonder, J.; Brooker, A.; Burton, E.; Wang, J.; Konan, A.

    2014-06-01

    This presentation discusses current research at NREL on advanced wireless power transfer vehicle and infrastructure analysis. The potential benefits of E-roadway include more electrified driving miles from battery electric vehicles, plug-in hybrid electric vehicles, or even properly equipped hybrid electric vehicles (i.e., more electrified miles could be obtained from a given battery size, or electrified driving miles could be maintained while using smaller and less expensive batteries, thereby increasing cost competitiveness and potential market penetration). The system optimization aspect is key given the potential impact of this technology on the vehicles, the power grid and the road infrastructure.

  8. RFID TECHNOLOGY FOR AVI: FIELD DEMONSTRATION OF A WIRELESS SOLAR POWERED E-ZPASS1

    E-Print Network [OSTI]

    Mitchell, John E.

    - 1 - RFID TECHNOLOGY FOR AVI: FIELD DEMONSTRATION OF A WIRELESS SOLAR POWERED E-ZPASS®1 TAG READER solar powered E-ZPass tag readers were deployed and tested at two locations in upstate New York). EQUIPMENT AND TECHNOLOGY The wireless, solar powered E-ZPass tag readers were developed and deployed by RPI

  9. Performance Analysis of Simultaneous Wireless Information and Power Transfer with Ambient RF

    E-Print Network [OSTI]

    Privault, Nicolas

    isotropic wireless power, and reception of the power by converting the harvested RF waves into electricity. INTRODUCTION RF energy harvesting techniques have evolved as a promis- ing and cost-effective solutionPerformance Analysis of Simultaneous Wireless Information and Power Transfer with Ambient RF Energy

  10. Improving the Capacity in Wireless Networks Through Integrated Channel Base Station and Power Assignment

    E-Print Network [OSTI]

    Tassiulas, Leandros

    Improving the Capacity in Wireless Networks Through Integrated Channel Base Station and Power Allocation Algorithm (JRAA) that makes the channel base station and power assignment in a wireless net­ work base station and power assign­ ment. Finally several versions of the two­way channel assignment problem

  11. Wideband Phased Array & Rectenna Design and Modeling for Wireless Power Transmission 

    E-Print Network [OSTI]

    Hansen, Jonathan Noel

    2012-02-14

    with Hertz and Tesla in the 1800?s and concluding with today?s interest in a space solar-power satellite. Section 6 provides a theoretical discussion of rectenna and wireless power transmission technology. The wireless power transmission system as a...

  12. Solar-powered WirelessMesh Networksfor Environmental Monitoring Torsten Braun, Thomas Staub, Benjamin Nyffenegger

    E-Print Network [OSTI]

    Braun, Torsten

    Solar-powered WirelessMesh Networksfor Environmental Monitoring Torsten Braun, Thomas Staub the development and experiencesof a solar-power driven wirelessmesh network for connectingsensorsin rural is available. II. SOLAR-POWER DRIVEN WIRELESS MESH NETWORK DEPLYOMENT AND OPERATION In a technology project

  13. Simulation and Evaluation of Unsynchronized Power Saving Mechanisms in Wireless Ad hoc

    E-Print Network [OSTI]

    Braun, Torsten

    Simulation and Evaluation of Unsynchronized Power Saving Mechanisms in Wireless Ad hoc Networks@sics.se Abstract. Power saving mechanisms in wireless ad hoc network nodes mainly switch off the transmission proposed power saving approach based on asynchronous wake-up patterns and wake-up announcements integrated

  14. Thermoelectric powered wireless sensors for spent fuel monitoring

    SciTech Connect (OSTI)

    Carstens, T.; Corradini, M.; Blanchard, J. [Dept. of Engineering Physics, Univ. of Wisconsin-Madison, Madison, WI 53706 (United States); Ma, Z. [Dept. of Electrical and Computer Engineering, Univ. of Wisconsin-Madison, Madison, WI 53706 (United States)

    2011-07-01

    This paper describes using thermoelectric generators to power wireless sensors to monitor spent nuclear fuel during dry-cask storage. OrigenArp was used to determine the decay heat of the spent fuel at different times during the service life of the dry-cask. The Engineering Equation Solver computer program modeled the temperatures inside the spent fuel storage facility during its service life. The temperature distribution in a thermoelectric generator and heat sink was calculated using the computer program Finite Element Heat Transfer. From these temperature distributions the power produced by the thermoelectric generator was determined as a function of the service life of the dry-cask. In addition, an estimation of the path loss experienced by the wireless signal can be made based on materials and thickness of the structure. Once the path loss is known, the transmission power and thermoelectric generator power requirements can be determined. This analysis estimates that a thermoelectric generator can produce enough power for a sensor to function and transmit data from inside the dry-cask throughout its service life. (authors)

  15. Single-cell forward link power allocation using pricing in wireless networks

    E-Print Network [OSTI]

    Liu, P J; Zhang, P F; Jordan, Scott; Honig, M L

    2004-01-01

    and S. Jordan, “Two-cell power allocation for wireless datawith . At high power limits, cell progresses through thethere are excess power and codes in the cell, but that the

  16. Inductive Wireless Power Transfer for RFID & Embedded Devices: Coil Misalignment Analysis and Design 

    E-Print Network [OSTI]

    Fotopoulou, Kyriaki

    2008-01-01

    Radio frequency inductive coupling is extensively employed for wireless powering of embedded devices such as low power passive near-field RFID systems and implanted sensors. The efficiency of low power inductive links ...

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

    E-Print Network [OSTI]

    Abas, Kevin Mathys

    2015-01-01

    2 Related Work Wireless Smart Cameras . . . . . .Solar-Harvesting Wireless Smart Camera Research System Forof the 1st Workshop on Distributed Smart Cameras, 2006. [51

  18. Regulation control and energy management scheme for wireless power transfer

    DOE Patents [OSTI]

    Miller, John M.

    2015-12-29

    Power transfer rate at a charging facility can be maximized by employing a feedback scheme. The state of charge (SOC) and temperature of the regenerative energy storage system (RESS) pack of a vehicle is monitored to determine the load due to the RESS pack. An optimal frequency that cancels the imaginary component of the input impedance for the output signal from a grid converter is calculated from the load of the RESS pack, and a frequency offset f* is made to the nominal frequency f.sub.0 of the grid converter output based on the resonance frequency of a magnetically coupled circuit. The optimal frequency can maximize the efficiency of the power transfer. Further, an optimal grid converter duty ratio d* can be derived from the charge rate of the RESS pack. The grid converter duty ratio d* regulates wireless power transfer (WPT) power level.

  19. Development of a photovoltaic power supply for wireless sensor networks.

    SciTech Connect (OSTI)

    Harvey, Matthew R.; Kyker, Ronald D.

    2005-06-01

    This report examines the design process of a photovoltaic (solar) based power supply for wireless sensor networks. Such a system stores the energy produced by an array of photovoltaic cells in a secondary (rechargeable) battery that in turn provides power to the individual node of the sensor network. The goal of such a power supply is to enable a wireless sensor network to have an autonomous operation on the order of years. Ideally, such a system is as small as possible physically while transferring the maximum amount of available solar energy to the load (the node). Within this report, there is first an overview of current solar and battery technologies, including characteristics of different technologies and their impact on overall system design. Second is a general discussion of modeling, predicting, and analyzing the extended operation of a small photovoltaic power supply and setting design parameters. This is followed by results and conclusions from the testing of a few basic systems. Lastly, some advanced concepts that may be considered in order to optimize future systems will be discussed.

  20. Primary Side Power Flow Control of Wireless Power Transfer for Electric Vehicle Charging

    SciTech Connect (OSTI)

    Miller, John M; Onar, Omer C; Chinthavali, Madhu Sudhan

    2015-01-01

    Various noncontacting methods of plug-in electric vehicle charging are either under development or now deployed as aftermarket options in the light-duty automotive market. Wireless power transfer (WPT) is now the accepted term for wireless charging and is used synonymously for inductive power transfer and magnetic resonance coupling. WPT technology is in its infancy; standardization is lacking, especially on interoperability, center frequency selection, magnetic fringe field suppression, and the methods employed for power flow regulation. This paper proposes a new analysis concept for power flow in WPT in which the primary provides frequency selection and the tuned secondary, with its resemblance to a power transmission network having a reactive power voltage control, is analyzed as a transmission network. Analysis is supported with experimental data taken from Oak Ridge National Laboratory s WPT apparatus. This paper also provides an experimental evidence for frequency selection, fringe field assessment, and the need for low-latency communications in the feedback path.

  1. Wireless Power Transfer for Electric Vehicles

    SciTech Connect (OSTI)

    Scudiere, Matthew B; McKeever, John W

    2011-01-01

    As Electric and Hybrid Electric Vehicles (EVs and HEVs) become more prevalent, there is a need to change the power source from gasoline on the vehicle to electricity from the grid in order to mitigate requirements for onboard energy storage (battery weight) as well as to reduce dependency on oil by increasing dependency on the grid (our coal, gas, and renewable energy instead of their oil). Traditional systems for trains and buses rely on physical contact to transfer electrical energy to vehicles in motion. Until recently, conventional magnetically coupled systems required a gap of less than a centimeter. This is not practical for vehicles of the future.

  2. Abstract The process control industry has shown great interest in implementation of low cost, low power wireless sensor

    E-Print Network [OSTI]

    power transmission through metal walls using piezoelectric transducers [1], electromechanical network, low power wireless sensor networks. Such networks are much easier to deploy and reconfigure compared Wireless sensing and control networks have given machinery designers the flexibility to place network

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

    E-Print Network [OSTI]

    Zhang, Junshan

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

  4. Power Optimization of Memoryless Wireless Media Systems with Space-Time Block Codes

    E-Print Network [OSTI]

    Yousefi'zadeh, Homayoun

    Power Optimization of Memoryless Wireless Media Systems with Space-Time Block Codes Hamid present an analytical so- lution to the problem of power control in wireless media systems with multiple- less media systems subject to a given level of Quality of Service (QoS) and an available bit rate. Our

  5. Utilizing Solar Power in Wireless Sensor Networks Thiemo Voigt, Hartmut Ritter, Jochen Schiller

    E-Print Network [OSTI]

    Voigt, Thiemo

    Utilizing Solar Power in Wireless Sensor Networks Thiemo Voigt, Hartmut Ritter, Jochen Schiller propose to utilize solar power in wireless sensor networks, establishing a topology where ­ changing over propose and evaluate two protocols that perform solar- aware routing. The presented simulation results

  6. Telos: Enabling Ultra-Low Power Wireless Research Joseph Polastre, Robert Szewczyk, and David Culler

    E-Print Network [OSTI]

    Culler, David E.

    Telos: Enabling Ultra-Low Power Wireless Research Joseph Polastre, Robert Szewczyk, and David,szewczyk,culler}@cs.berkeley.edu Abstract-- We present Telos, an ultra low power wireless sensor module ("mote") for research and 128kB of flash), extensive sensor interfaces (8 analog lines, several digital IO Fig. 1. Telos ultra-low

  7. Wireless Sensor Networks Powered by Ambient Energy Harvesting (WSN-HEAP) Survey and

    E-Print Network [OSTI]

    Shihada, Basem

    Wireless Sensor Networks Powered by Ambient Energy Harvesting (WSN-HEAP) ­ Survey and Challenges and Engineering National University of Singapore, Singapore Email: g0601792@nus.edu.sg Abstract--Wireless sensor is to convert the ambient energy from the environment into electricity to power the sensor nodes. While

  8. A Scheduling Algorithm for Consistent Monitoring Results with Solar Powered High-Performance Wireless Embedded Systems

    E-Print Network [OSTI]

    Simunic, Tajana

    but critical task for solar powered wireless high power embedded systems. Our algorithm relies on an energy-Performance Wireless Embedded Systems Denis Dondi, Piero Zappi, Tajana Simuni Rosing Computer Science and Engineering]. For such systems, there are typically twofold objectives: (1) energy consumption must be reduced to extend

  9. A Battery-Less, Energy Harvesting Device for Long Range Scavenging of Wireless Power from Terrestrial TV Broadcasts

    E-Print Network [OSTI]

    Tentzeris, Manos

    A Battery-Less, Energy Harvesting Device for Long Range Scavenging of Wireless Power from. Index Terms -- Antenna, Charge Pump, DVT, Energy Harvesting, Power Scavenging, TV, Wireless Power resulted in broadcast of perpetually on, wireless digital TV signals over the air at wider bandwidths

  10. 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 Georgia Electronic Design Center/ECE, Georgia Institute of Technology Atlanta, GA, USA 1 Rushi.Vyas@gatech.edu Abstract-- In this paper, a novel wireless "Battery-less Solar Powered Wireless Tag" with an enhanced range

  11. A single sediment-Microbial Fuel Cell powering a wireless telecommunication system Yohann R. J. Thomas a

    E-Print Network [OSTI]

    1 A single sediment-Microbial Fuel Cell powering a wireless telecommunication system Yohann R. J Abstract We report the ability of a single sediment-Microbial Fuel Cell (MFC) to power wireless sensor, with no membrane or artificial catalysts. Key words: Sediment-Microbial Fuel Cell; Sensor Networks; Wireless

  12. Robust and Probabilistic Power-aware Scheduling of Wireless Sensor Networks

    E-Print Network [OSTI]

    Egerstedt, Magnus

    that sensing devices are equipped with small devices like solar panels to harvest energy. In such scenariosRobust and Probabilistic Power-aware Scheduling of Wireless Sensor Networks Hassan Jaleel and Magnus Egerstedt Abstract-- In this paper, we investigate randomly deployed wireless sensor networks

  13. Characterization of Asymmetry in Low-Power Wireless Links: An Empirical Study

    E-Print Network [OSTI]

    New South Wales, University of

    in wireless sensor network (WSN) have shown that asymmetry in low-power wireless links has a significant effect on the perfor- mance of WSN network protocols. Protocols, which work in simulation studies often, is thus, of importance for the design and operation of resilient WSN protocols in real scenarios

  14. Impact of Fading Wireless Channel on The Performance of Game Theoretic Power Control Algorithms for CDMA Wireless Data

    E-Print Network [OSTI]

    Impact of Fading Wireless Channel on The Performance of Game Theoretic Power Control Algorithms mhayajneh@uaeu.ac.ae Chaouki Abdallah EECE Building 112 University of New Mexico Albuquerque, NM 87131 study the existence, uniqueness of Nash equilibrium (NE), and the social desirability of NE

  15. Lunar electric power systems utilizing the SP-100 reactor coupled to dynamic conversion systems. Final report

    SciTech Connect (OSTI)

    Harty, R.B.; Durand, R.E.

    1993-03-01

    An integration study was performed by Rocketdyne under contract to NASA-LeRC. The study was concerned with coupling an SP-0100 reactor to either a Brayton or Stirling power conversion system. The application was for a surface power system to supply power requirements to a lunar base. A power level of 550 kWe was selected based on the NASA Space Exploration Initiative 90-day study. Reliability studies were initially performed to determine optimum power conversion redundancy. This study resulted in selecting three operating engines and one stand-by unit. Integration design studies indicated that either the Brayton or Stirling power conversion systems could be integrated with the PS-100 reactor. The Stirling system had an integration advantage because of smaller piping size and fewer components. The Stirling engine, however, is more complex and heavier than the Brayton rotating unit, which tends to off-set the Stirling integration advantage. From a performance consideration, the Brayton had a 9 percent mass advantage, and the Stirling had a 50 percent radiator advantage.

  16. Battery-free Wireless Sensor Network For Advanced Fossil-Fuel Based Power Generation

    SciTech Connect (OSTI)

    Yi Jia

    2011-02-28

    This report summarizes technical progress achieved during the project supported by the Department of Energy under Award Number DE-FG26-07NT4306. The aim of the project was to conduct basic research into battery-free wireless sensing mechanism in order to develop novel wireless sensors and sensor network for physical and chemical parameter monitoring in a harsh environment. Passive wireless sensing platform and five wireless sensors including temperature sensor, pressure sensor, humidity sensor, crack sensor and networked sensors developed and demonstrated in our laboratory setup have achieved the objective for the monitoring of various physical and chemical parameters in a harsh environment through remote power and wireless sensor communication, which is critical to intelligent control of advanced power generation system. This report is organized by the sensors developed as detailed in each progress report.

  17. Single-Phase Active Boost Rectifier with Power Factor Correction for Wireless Power Transfer Applications

    SciTech Connect (OSTI)

    Chinthavali, Madhu Sudhan [ORNL] [ORNL; Onar, Omer C [ORNL] [ORNL; Miller, John M [ORNL] [ORNL; Tang, Lixin [ORNL] [ORNL

    2013-01-01

    Wireless Power Transfer (WPT) technology is a novel research area in the charging technology that bridges utility and the automotive industries. There are various solutions that are currently being evaluated by several research teams to find the most efficient way to manage the power flow from the grid to the vehicle energy storage system. There are different control parameters that can be utilized to compensate for the change in the impedance. To understand the power flow through the system this paper presents a novel approach to the system model and the impact of different control parameters on the load power. The implementation of an active front-end rectifier on the grid side for power factor control and voltage boost capability for load power regulation is also discussed.

  18. Power Optimal Routing in Wireless Networks Rajit Manohar and Anna Scaglione

    E-Print Network [OSTI]

    Manohar, Rajit

    Power Optimal Routing in Wireless Networks Rajit Manohar and Anna Scaglione ECE, Cornell University Abstract-- Reducing power consumption and increasing bat- tery life of nodes in an ad-hoc network requires an integrated power control and routing strategy. Power optimal routing selects the multi-hop links that require

  19. Exploiting Idle Communication Power to Improve Wireless Network Performance and Energy Efficiency

    E-Print Network [OSTI]

    Chen, Songqing

    low and high channel rate stations. I. INTRODUCTION Mobile devices are usually driven by battery power, which we call the idle communication power of a station. In addition to battery power, mobile devicesExploiting Idle Communication Power to Improve Wireless Network Performance and Energy Efficiency

  20. Exploiting Idle Communication Power to Improve Wireless Network Performance and Energy Efficiency

    E-Print Network [OSTI]

    Wang, Haining

    rate stations. I. INTRODUCTION Mobile devices are usually driven by battery power. Due to limited communication power of a station. In addition to battery power, mobile devices are very sus- ceptibleExploiting Idle Communication Power to Improve Wireless Network Performance and Energy Efficiency

  1. Dynamic power allocation and routing for satellite and wireless networks with time varying channels

    E-Print Network [OSTI]

    Neely, Michael J. (Michael James), 1975-

    2004-01-01

    Satellite and wireless networks operate over time varying channels that depend on attenuation conditions, power allocation decisions, and inter-channel interference. In order to reliably integrate these systems into a high ...

  2. Completion time minimization and robust power control in wireless packet networks

    E-Print Network [OSTI]

    Ng, Chris T. K.

    A wireless packet network is considered in which each user transmits a stream of packets to its destination. The transmit power of each user interferes with the transmission of all other users. A convex cost function of ...

  3. Transmission Line Resistance Compression Networks and Applications to Wireless Power Transfer

    E-Print Network [OSTI]

    Barton, Taylor W.

    Microwave-to-dc rectification is valuable in many applications, including RF energy recovery, dc-dc conversion, and wireless power transfer. In such applications, it is desired for the microwave rectifier system to provide ...

  4. r-shrink: A Heuristic for Improving Minimum Power Broadcast Trees in Wireless Networks

    E-Print Network [OSTI]

    Arabshahi, Payman

    network with an identified source node, the minimum power broad- cast (MPB) problem in wireless networks to better accommodate the nodes, which have been disconnected from the tree as a result of the shrinkage

  5. Magnetic Resonant Coupling As a Potential Means for Wireless Power Transfer to Multiple Small Receivers

    E-Print Network [OSTI]

    Cannon, Benjamin Louis

    Wireless power transfer via magnetic resonant coupling is experimentally demonstrated in a system with a large source coil and either one or two small receivers. Resonance between source and load coils is achieved with ...

  6. A systems engineering approach to the analysis of Wireless Power Transmission Systems 

    E-Print Network [OSTI]

    Brown, Alan Madden

    1993-01-01

    "Wireless Power Transmission: The Commercial Potential" ) was structured to provide a forum for participants to present and discuss applications and markets for wireless power technology, relevant societal and business considerations, and environmental... of the entire list of hypothencal systems. The deductions relate to system performance, cost, time, reliability, flexibility, market, etc involves evaluating the analyses and comparing these evaluations with the oblectives, criteria, and constraints...

  7. Power Electronics Design of a Solar Powered In-car Wireless Tag for Asset Tracking and Parking Applications

    E-Print Network [OSTI]

    and testing of a power conditioning circuit for a solar powered in-car wireless tag for asset tracking by using the maximum power point tracking (MPPT) technique. A solar cell charges the battery through a 1 To whom any correspondence should be addressed. #12;battery charger that can prevent the battery from

  8. Power-Efficient Directional Wireless Communication on Small Form-Factor Mobile Devices

    E-Print Network [OSTI]

    Zhong, Lin

    -antenna system designed to realize directional communication efficiently. Unlike power- hungry and expensive the power con- sumption of a commercial 802.11 adapter by up to 20% and pro- vide better quality underPower-Efficient Directional Wireless Communication on Small Form-Factor Mobile Devices Ardalan

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

    E-Print Network [OSTI]

    California at Berkeley, University of

    Design and Analysis of Micro-Solar Power Systems for Wireless Sensor Networks Jaein Jeong, Xiaofan and the power they obtain from their environment. Several micro-solar powered designs have been developed a taxonomy of the micro-solar design space identifying key components, design choices, interactions

  10. Run-Time Software Monitor of the Power Consumption of Wireless Network Interface Cards

    E-Print Network [OSTI]

    Bogliolo, Alessandro

    is limited by their power consumption, that is responsible of a large fraction of the energy budgetRun-Time Software Monitor of the Power Consumption of Wireless Network Interface Cards Emanuele: the nominal behavior of the card (taken from protocol and product specifications), its inherent power

  11. Challenges and Opportunities for Compound Semiconductor Devices in Next Generation Wireless Base Station Power Amplifiers

    E-Print Network [OSTI]

    Asbeck, Peter M.

    Station Power Amplifiers Lawrence Larson, Peter Asbeck, and Donald Kimball Center for Wireless Communications, Dept of ECE, UCSD, La Jolla, CA 92093 Abstract -- Power Amplifiers for cellular base stations their networks to 3G services in the coming years, it is expected that the market for base station power

  12. Joint Optimal Channel Base Station and Power Assignment for Wireless Access \\Lambda

    E-Print Network [OSTI]

    Tassiulas, Leandros

    Joint Optimal Channel Base Station and Power Assignment for Wireless Access \\Lambda Symeon powers, forward (downstream) and reverse (upstream) channels, and base stations such that every mobile the transmission powers both of the base stations and the users will be controllable. This great flexibility

  13. Quantitative Analysis of Transmission Power Control in Wireless Ad-hoc Networks

    E-Print Network [OSTI]

    Sivakumar, Raghupathy

    -hoc network is determined by the transmission power of the stations. Be- cause different topologies have transmis- sion power is determined by the network load, the number of stations, and the network size1 Quantitative Analysis of Transmission Power Control in Wireless Ad-hoc Networks Seung-Jong Park

  14. OPTIMAL POWER/DELAY TRADE-OFFS IN WIRELESS COMMUNICATIONS SMALL DELAY ASYMPTOTICS

    E-Print Network [OSTI]

    Berry, Randall

    OPTIMAL POWER/DELAY TRADE-OFFS IN WIRELESS COMMUNICATIONS ­ SMALL DELAY ASYMPTOTICS Randall A@ece.northwestern.edu ABSTRACT In this paper we consider the optimal trade-off between av- erage transmission power and average the behavior of this trade-off in the regime of asymptotically large power and small delay. Our focus

  15. Improved Power-Delay Trade-off in Wireless Ad Hoc Networks Using Opportunistic Routing

    E-Print Network [OSTI]

    Lee, Yong Hoon

    Improved Power-Delay Trade-off in Wireless Ad Hoc Networks Using Opportunistic Routing Won power- delay trade-off than the conventional routing while providing up to a logarithmic boost that the power can be reduced at the expense of increased delay for both scenarios, but better trade-off can

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

    E-Print Network [OSTI]

    California at Berkeley, University of

    Design and Analysis of Micro-Solar Power Systems for Wireless Sensor Networks Jaein Jeong Xiaofan or to redistribute to lists, requires prior specific permission. #12;Design and Analysis of Micro-Solar Power Systems. Several micro-solar powered designs have been developed to address this important problem but little

  17. Wireless Power May Cut the Cord for Plug-In Devices, Including Cars1 by Will Ferguson for National Geographic News, abbreviated2

    E-Print Network [OSTI]

    South Bohemia, University of

    Boston, these and other applications of wireless electricity signal a future with fewer snaking5 cables.6 the industrial potential for wireless power is huge,12 especially in the realm of electric vehicles and wirelessWireless Power May Cut the Cord for Plug-In Devices, Including Cars1 by Will Ferguson for National

  18. DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS

    SciTech Connect (OSTI)

    Paul Tubel

    2005-05-08

    The development work during this quarter was focused in the test of the wireless gauge in a well. The tool was sent to Halliburton for a test. The company indicated that the test well was not available for 4 months and the company was not able to schedule a test of the wireless gauge in its test well. The tool was returned to Tubel Tech's facility in The Woodlands. Tubel Tech is looking for a new test well to deploy the wireless gauge to complete the requirements for the DOE.

  19. Energy Efficient Greedy Link Scheduling and Power Control in wireless networks

    E-Print Network [OSTI]

    Sridharan, Arun

    2012-01-01

    We consider the problem of joint link scheduling and power control for wireless networks with average transmission power constraints. Due to the high computational complexity of the optimal policies, we extend the class of greedy link scheduling policies to handle average power constraints. We develop a greedy link scheduling and power control scheme GECS, with provable performance guarantees. We show that the performance of our greedy scheduler can be characterized using the Local Pooling Factor (LPF) of a network graph, which has been previously used to characterize the stability of the Greedy Maximal Scheduling (GMS) policy for wireless networks. We also simulate the performance of GECS on wireless network, and compare its performance to another candidate greedy link scheduling and power control policy.

  20. Some Implications of Low Power Wireless to IP Networking Kannan Srinivasan, Prabal Dutta, Arsalan Tavakoli, and Philip Levis

    E-Print Network [OSTI]

    Levis, Philip

    and cellphones. This trend towards smaller, lower power, and more numerous devices has led to new wirelessSome Implications of Low Power Wireless to IP Networking Kannan Srinivasan, Prabal Dutta, Arsalan Division, UC Berkeley, Berkeley, CA Abstract We examine and outline challenges in IPv6 routing over low-power

  1. appeared in IEEE CAS Low Power Workshop, August 2002 Abstract--The rapid emergence of wireless 802.11 LANs

    E-Print Network [OSTI]

    Han, Richard Y.

    networks such as Bluetooth RF and IR-based wireless sensor networks. Ideally, the transmit power can symmetry need not be assumed. Initial work on transmit power control in wireless ad hoc networks to the minimum power at which the network displays the same connectivity as that displayed at the maximum

  2. Design of a Novel, Battery-less, Solar Powered Wireless Tag for Enhanced Range Remote Tracking Applications

    E-Print Network [OSTI]

    Tentzeris, Manos

    Design of a Novel, Battery-less, Solar Powered Wireless Tag for Enhanced Range Remote Tracking and Microwave/antenna design are utilized to establish an asynchronous wireless link between the solar powered (centered at 904.4 MHz). System Level Design The fundamental problem with integrating the solar powered tag

  3. Wireless Power Hotspot that Charges All of Your Devices

    E-Print Network [OSTI]

    Shi, Lixin

    Each year, consumers carry an increasing number of gadgets on their person: mobile phones, tablets, smartwatches, etc. As a result, users must remember to recharge each device, every day. Wireless charging promises to free ...

  4. Downhole Power Generation and Wireless Communications for Intelligent Completions Applications

    SciTech Connect (OSTI)

    Paul Tubel

    2005-11-07

    Tubel Tech has been working with the DoE Rocky Mountain test center to create a CRADA which will allow Tubel Tech to test its wireless gauge in a well at the test center. The CRADA agreement should be completed by the next quarter and Tubel Tech expects to perform the final test on this project during the next quarter as well. The wireless gauge has not been modified or upgraded during this report period.

  5. Adaptive and Dynamic Wireless Routers with Smart Antenna for Power Management

    E-Print Network [OSTI]

    Krishnan, S Venkata; Kumar, N Senthil

    2012-01-01

    In the recent evolution of wireless technologies, the power management has been a worrying factor. In order to overcome the power shortage, steps are taken to find new kind of energy harvesting methods, power attenuation reduction methods and power saving techniques. Wireless routers even though consume not much of power, battery powered devices require a lot. Omni directional antenna embedded with multiple antennae focusing the beam of radio wave signals in the direction of nodes with least transmission angle can be a solution for this problem which is called as "Smart Antenna". To reduce power maceration we are going for adaptive and dynamic transmission wherein the transmission angle of antennae is varied in accordance with the movement of nodes. Apart from saving the power considerably, it also improves the signal strength

  6. UHF Solar Powered Active Oscillator Antenna on Low Cost Flexible Substrate for Wireless Identification Applications

    E-Print Network [OSTI]

    Tentzeris, Manos

    UHF Solar Powered Active Oscillator Antenna on Low Cost Flexible Substrate for Wireless antenna using low cost flexible substrate materials is presented. Flexible amorphous silicon a-Si solar nature of the circuit and providing operational autonomy by harvesting solar power without affecting

  7. EPIC-RoofNet: An Experimental Testbed for Solar-powered Wireless Sensor Networks

    E-Print Network [OSTI]

    Nasipuri, Asis

    experiments on solar-powered sensor nodes. Due to constraints in cost and size, the solar panelsEPIC-RoofNet: An Experimental Testbed for Solar-powered Wireless Sensor Networks Amitangshu Pal that periodically sample environmental parameters such as solar irradiance and temperature and transmit them

  8. An Ultra Low Power SIMD Processor for Wireless Devices , Sangwon Seo1

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    An Ultra Low Power SIMD Processor for Wireless Devices Mark Woh1 , Sangwon Seo1 , Chaitali, Tempe, AZ {mwoh,swseo,mahlke,tnm}@umich.edu chaitali@asu.edu ABSTRACT This paper presents an ultra low executed. For ultra low power operation, we advocate operating the processor at near threshold volt- age

  9. Wireless Power Transfer to Mobile Wearable Device via Resonance Magnetic Olutola Jonah and Stavros V. Georgakopoulos

    E-Print Network [OSTI]

    Tentzeris, Manos

    . Specifically, SCMR's wireless power transfer from a source of air to a sensor close to tissue is analyzed at home,which can reduce cost and improve comfort[I]. It is also used for tracking human body kinematics power lever, in order to avoid excessive heating of the tissue and resulting in significant tissue

  10. Wireless Sensor Networks Powered by Ambient Energy Harvesting (WSN-HEAP) Survey and

    E-Print Network [OSTI]

    Shihada, Basem

    Wireless Sensor Networks Powered by Ambient Energy Harvesting (WSN-HEAP) ­ Survey and Challenges networks (WSNs) research has pre- dominantly assumed the use of a portable and limited energy source, viz. batteries, to power sensors. Without energy, a sensor is essentially useless and cannot contribute

  11. Final Report Providing the Design for Low-Cost Wireless Current Transducer and Electric Power Sensor Prototype

    SciTech Connect (OSTI)

    Kintner-Meyer, Michael CW; Burghard, Brion J.; Reid, Larry D.

    2005-01-31

    This report describes the design and development of a wireless current transducer and electric power sensor prototype. The report includes annotated schematics of the power sensor circuitry and the printed circuit board. The application program used to illustrate the functionality of the wireless sensors is described in this document as well.

  12. High-Efficiency Harmonically-Terminated Rectifier for Wireless Powering Applications Michael Roberg, Erez Falkenstein and Zoya Popovic

    E-Print Network [OSTI]

    Popovic, Zoya

    High-Efficiency Harmonically-Terminated Rectifier for Wireless Powering Applications Michael Roberg of Colorado, Boulder, CO, 80309-0425 Abstract-In wireless powering, the rectifier efficiency has a large effect on overall system efficiency. This paper presents an approach to high-efficiency microwave

  13. Performance Analysis of Battery Power Management Schemes in Wireless Mobile Balakrishna J. Prabhu, A. Chockalingam and Vinod Sharma

    E-Print Network [OSTI]

    Sharma, Vinod

    Performance Analysis of Battery Power Management Schemes in Wireless Mobile Devices Balakrishna J Abstract--In this paper, we analyze the performance of battery power management schemes in wireless mobile devices using a queueing theory approach. We model the battery as a server with finite service capacity

  14. An efficient wireless power transfer system with security considerations for electric vehicle applications

    SciTech Connect (OSTI)

    Zhang, Zhen; Chau, K. T. Liu, Chunhua; Qiu, Chun; Lin, Fei

    2014-05-07

    This paper presents a secure inductive wireless power transfer (WPT) system for electric vehicle (EV) applications, such as charging the electric devices inside EVs and performing energy exchange between EVs. The key is to employ chaos theory to encrypt the wirelessly transferred energy which can then be decrypted by specific receptors in the multi-objective system. In this paper, the principle of encrypted WPT is first revealed. Then, computer simulation is conducted to validate the feasibility of the proposed system. Moreover, by comparing the WPT systems with and without encryption, the proposed energy encryption scheme does not involve noticeable power consumption.

  15. Abstract--The self-powering, long-lasting, and functional features of embedded wireless micro-sensors appeal to an ever-

    E-Print Network [OSTI]

    Rincon-Mora, Gabriel A.

    . Intermittent Charger Load Harvester SiP Wireless Micro-Sensor Li Ion Power Conditioning Energy Conditioning1 Abstract--The self-powering, long-lasting, and functional features of embedded wireless micro-sustaining, vibration energy harvester. I. ELECTROSTATIC ENERGY HARVESTING ELF-POWERED micro-systems, such as wireless

  16. Wireless-Powered Cooperative Communications via a Hybrid Relay

    E-Print Network [OSTI]

    Zhou, Xiangyun "Sean"

    - tralian Research Council's Discovery Projects funding scheme (project number DP140101133). S R AP Energy is assumed to have no embedded energy supply. Thus, it first needs to harvest energy from the signals but also charge the source with wireless energy transfer in the DL. Considering different possible

  17. DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS

    SciTech Connect (OSTI)

    Paul Tubel

    2005-05-08

    The wireless gauge has not been modified or upgraded during this report period. Tubel Tech is working with the DoE Rocky Mountain test center to create a CRADA to allow Tubel Tech to test its tool in a well at the test center.

  18. Minimizing power consumption is crucial in battery power limited secure wireless mobile networks. In this paper, we (a) introduce a hardware/software set-up to

    E-Print Network [OSTI]

    Subbalakshmi , K.P. "Suba"

    mobile networks. In this paper, we (a) introduce a hardware/software set-up to measure the battery power hurdle in providing information security in mobile wireless devices is the limited battery power. The pace of advancements in battery technologies has not kept up with that of wireless technologies

  19. Development of Wireless Techniques in Data and Power Transmission - Application for Particle Physics Detectors

    E-Print Network [OSTI]

    Brenner, R; Dehos, C; De Lurgio, P; Djurcic, Z; Drake, G; Gimenez, J L Gonzalez; Gustafsson, L; Kim, D W; Locci, E; Roehrich, D; Schoening, A; Siligaris, A; Soltveit, H K; Ullaland, K; Vincent, P; Wiednert, D; Yang, S

    2015-01-01

    Wireless techniques have developed extremely fast over the last decade and using them for data and power transmission in particle physics detectors is not science- fiction any more. During the last years several research groups have independently thought of making it a reality. Wireless techniques became a mature field for research and new developments might have impact on future particle physics experiments. The Instrumentation Frontier was set up as a part of the SnowMass 2013 Community Summer Study [1] to examine the instrumentation R&D for the particle physics research over the coming decades: {\\guillemotleft} To succeed we need to make technical and scientific innovation a priority in the field {\\guillemotright}. Wireless data transmission was identified as one of the innovations that could revolutionize the transmission of data out of the detector. Power delivery was another challenge mentioned in the same report. We propose a collaboration to identify the specific needs of different projects that m...

  20. Wireless Power Transfer for High-precision Position Detection of Railroad Vehicles

    E-Print Network [OSTI]

    Ryu, Hyun-Gyu

    2015-01-01

    Detection of vehicle position is critical for successful operation of intelligent transportation system. In case of railroad transportation systems, position information of railroad vehicles can be detected by GPS, track circuits, and so on. In this paper, position detection based on tags onto sleepers of the track is investigated. Position information stored in the tags is read by a reader placed at the bottom of running railroad vehicle. Due to limited capacity of battery or its alternative in the tags, power required for transmission of position information to the reader is harvested by the tags from the power wirelessly transferred from the reader. Basic mechanism in wireless power transfer is magnetic induction and power transfer efficiency according to the relative location of the reader to a tag is discussed with simulation results. Since power transfer efficiency is significantly affected by the ferromagnetic material (steel) at the bottom of the railroad vehicle and the track, magnetic beam shaping b...

  1. Fabrication and Evaluation of a High Performance SiC Inverter for Wireless Power Transfer Applications

    SciTech Connect (OSTI)

    Onar, Omer C [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Ning, Puqi [ORNL] [ORNL; Miller, John M [ORNL] [ORNL; Liang, Zhenxian [ORNL] [ORNL

    2013-01-01

    In this study, a high power density SiC high efficiency wireless power transfer converter system via inductive coupling has been designed and developed. The detailed power module design, cooling system design and power stage development are presented. The successful operation of rated power converter system demonstrates the feasible wireless charging plan. One of the most important part of this study is the wind bandgap devices packaged at the Oak Ridge National Laboratory (ORNL) using the in-house packaging technologies by employing the bare SiC dies acquired from CREE, which are rated at 50 A / 1200 V each. These packaged devices are also inhouse tested and characterized using ORNL s Device Characterization Facility. The successful operation of the proposed inverter is experimentally verified and the efficiency and operational characteristics of the inverter are also revealed.

  2. Power Scheduling for Multi-Hop Wireless Networks

    E-Print Network [OSTI]

    Yu, Yuan

    2009-01-01

    Maximization of Sum Rate under Power Constraint and DPC (5.1.3 Minimization of Power under Rate Constraint (Maximization of Sum Rate under Power Constraint and ZFDPC (

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

    E-Print Network [OSTI]

    Abas, Kevin Mathys

    2015-01-01

    SlugCam to run efficiently on solar power while leveraging aor renewables (e.g. , solar power). • Using multiple sensorsenergy resource. Solar power combined with rechargeable bat-

  4. A Wireless Power Interface for Rechargeable Battery Operated Neural Recording Implants

    E-Print Network [OSTI]

    Slatton, Clint

    A Wireless Power Interface for Rechargeable Battery Operated Neural Recording Implants Pengfei Li. The battery charger employs a new control loop that relaxes comparator resolution require- ments, provides-of- charge accuracy can be obtained under worst-case conditions for a comparator offset voltage of ±5m

  5. PowerComplexity Analysis of Pipelined VLSI FFT Architectures for Low Energy Wireless Communication Applications

    E-Print Network [OSTI]

    Papaefthymiou, Marios

    & En­ gineering (DDR&E) Multidisciplinary University Research Initiative (MURI) on ``Low EnergyPower­Complexity Analysis of Pipelined VLSI FFT Architectures for Low Energy Wireless Communication of process­ ing units and their interconnect topology. This paper analyzes the energy dissipation

  6. Noise Power and SNR Estimation for OFDM Based Wireless Communication Systems

    E-Print Network [OSTI]

    Arslan, HĂĽseyin

    Noise Power and SNR Estimation for OFDM Based Wireless Communication Systems H¨useyin Arslan for measuring the quality of the channel. Then, the system parameters are changed adaptively based of information transfer can be used to maximize system resource utilization with high quality of user experience

  7. Self-Powered Wireless Nano-scale Sensor Networks within Chemical Reactors

    E-Print Network [OSTI]

    New South Wales, University of

    Self-Powered Wireless Nano-scale Sensor Networks within Chemical Reactors Eisa Zarepour1 Mahbub, Australia #12;Abstract Because of their small size and unique nanomaterial properties, nano-scale sen- sor networks (NSNs) can be applied in many chemical applications to monitor and control the chemical process

  8. ENERGY-EFFICIENT COOPERATIVE COMMUNICATION BASED ON POWER CONTROL AND SELECTIVE RELAY IN WIRELESS SENSOR NETWORKS

    E-Print Network [OSTI]

    Cui, Jun-Hong

    ENERGY-EFFICIENT COOPERATIVE COMMUNICATION BASED ON POWER CONTROL AND SELECTIVE RELAY IN WIRELESS], the energy efficiency of cooperative communication based on a simple re- lay selection strategy Engineering, Texas A&M University, College Station, TX, 77843 ABSTRACT Cooperative communication with single

  9. Power Optimization of Wireless Media Systems with Space-Time Block Codes

    E-Print Network [OSTI]

    Yousefi'zadeh, Homayoun

    power consumption of mobile devices. Added to this the fact that the battery life is growing far more is, therefore, very impor- tant because it extends the lifetime of batteries. Multiple antenna at the University of California, Irvine; E-mail: [hy- ousefi,hamidj,mmoshfeg]@uci.edu . images across the wireless

  10. Energy Efficient Joint Scheduling and Power Control for Wireless Sensor Networks

    E-Print Network [OSTI]

    Krishnamachari, Bhaskar

    Energy Efficient Joint Scheduling and Power Control for Wireless Sensor Networks Gang Lu, CA 90089 { ganglu, bkrishna }@usc.edu Abstract-- We investigate the problem of energy efficiency and converges rapidly to the setting of which achieves energy efficiency while guaranteeing data delivery. I

  11. A Self-Powered Adaptive Wireless Sensor Network for Wastewater Treatment Plants Christopher M. Twigg,

    E-Print Network [OSTI]

    Chen, Yu

    A Self-Powered Adaptive Wireless Sensor Network for Wastewater Treatment Plants Yu Chen*, Christopher M. Twigg, Omowunmi A. Sadik, § Shiqiong Tong Dept. of Electrical and Computer Engineering of electricity continues to grow and the quality requirements of processed water tightens. However

  12. ENERGY-EFFICIENT GEOGRAPHIC ROUTING IN ENVIRONMENTALLY POWERED WIRELESS SENSOR NETWORKS

    E-Print Network [OSTI]

    Hou, Y. Thomas

    ENERGY-EFFICIENT GEOGRAPHIC ROUTING IN ENVIRONMENTALLY POWERED WIRELESS SENSOR NETWORKS Kai Zengt- efficient routing protocols are requisite for the WSN appli- cations. In this paper, we study energy-efficient efficient than the corresponding residual energy based protocols without considering the property

  13. Asymptotically Optimal Power-Aware Routing for Multihop Wireless Networks with Renewable

    E-Print Network [OSTI]

    Srikant, Rayadurgam

    1 Asymptotically Optimal Power-Aware Routing for Multihop Wireless Networks with Renewable Energy the performance of multihop radio networks in the presence of energy constraints, and design routing algorithms to optimally utilize the available energy. The energy model allows vastly different energy sources

  14. Design and Analysis of Micro-Solar Power Systems for Wireless

    E-Print Network [OSTI]

    California at Berkeley, University of

    Design and Analysis of Micro- Solar Power Systems for Wireless Sensor Networks Jaein Jeong UC Harvesting for WSN · Energy harvesting is need for large-scale long- term deployment. · Several designs made for different requirements, but little analysis is done for an ultimate design. 557 Trio node deployments

  15. Multi-hop wireless charging optimization in Low-Power Networks

    E-Print Network [OSTI]

    Boyer, Edmond

    to address the challenging problem of energy consumption in low-power networks. Based on these breakthroughs, none of these works have considered the multihop energy transmission, whose feasibility have been demonstrated recently. In such a system, a node can transmit energy wirelessly to its neighbors. In this paper

  16. ccurate and low-cost sensor localization is a critical requirement for the deployment of wireless sensor networks in a wide variety of applications. Low-power wireless sensors

    E-Print Network [OSTI]

    Cafarella, Michael J.

    Dramatic advances in RF and MEMS IC design have made possible the use of large networks of wireless sensorsccurate and low-cost sensor localization is a critical requirement for the deployment of wireless sensor networks in a wide variety of applications. Low-power wireless sensors may be many hops away from

  17. Abstract--Recent advances in sensors, low-power system-on-a-chip devices, and wireless communications, have prompted a

    E-Print Network [OSTI]

    Milenkovi, Aleksandar

    Abstract-- Recent advances in sensors, low-power system-on- a-chip devices, and wireless communications, have prompted a proliferation of wireless sensor networks. As these networks require advanced, and flexibility. Through the power of reconfigurability, wireless sensor network designs containing reprogrammable

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

    E-Print Network [OSTI]

    Sarkar, Mahasweta

    2006-01-01

    layer strategies for energy efficient wireless networking,”Investigating the energy consumption of a wireless networkR. R. Rao, “An Energy Aware Protocol for Wireless Networks”,

  19. Data-Semantics Driven Power Optimization of Wireless Medical Monitoring Devices

    E-Print Network [OSTI]

    Goudar, Vishwatma Arun

    2013-01-01

    Kaiser. “MicroLEAP: Energy-aware Wireless Sensor PlatformAdaptive Strategy for Energy- Efficiency in Wireless Medicaljid Sarrafzadeh. “Energy optimization in wireless medical

  20. Wireless Power Transmission An Obscure History and a Bright Future?

    E-Print Network [OSTI]

    La Rosa, Andres H.

    the primary circuit energized by the oscillator (Century Magazine, June 1900). The building of a global transmission. Solar Power Satellite to Earth Terminal. Desert Solar Power Farm to Civilization. Earth Terminal solution to the coming power shortage . . . Solar Power Satellites (SPS) (4) #12;Solar Power Satellites (5

  1. Microwave Metamaterial Applications using Complementary Split Ring Resonators and High Gain Rectifying Reflectarray for Wireless Power Transmission 

    E-Print Network [OSTI]

    Ahn, Chi Hyung

    2011-10-21

    with lateral dimensions below diffraction limits, and ?erenkov radiation, and doppler effect have been studied [7]-[14]. B.Wireless Power Transmission The history of wireless power transmission started with a successful experiment by 3 Nikola... Tesla [15] over a hundred year ago. He made it to transmit wireless power from his oscillators operating up to 100 MV at 150 KHz to two bulbs. From this success, several WPT studies had been conducted in Japan [16] and U.S. [17] in the 1920?s...

  2. Wireless power transfer for scaled electronic biomedical implants

    E-Print Network [OSTI]

    Theilmann, Paul Thomas

    2012-01-01

    Power Rectifier Driving LED ..b)current through the LED, (c)power delivered to the LED5.4.2 Higher Power Rectifier Driving LED Modeled Measured I

  3. Pyroelectric Energy Scavenging Techniques for Self-Powered Nuclear Reactor Wireless Sensor Networks

    SciTech Connect (OSTI)

    Hunter, Scott Robert [ORNL; Lavrik, Nickolay V [ORNL; Datskos, Panos G [ORNL; Clayton, Dwight A [ORNL

    2014-01-01

    Recent advances in technologies for harvesting waste thermal energy from ambient environments present an opportunity to implement truly wireless sensor nodes in nuclear power plants. These sensors could continue to operate during extended station blackouts and during periods when operation of the plant s internal power distribution system has been disrupted. The energy required to power the wireless sensors must be generated using energy harvesting techniques from locally available energy sources, and the energy consumption within the sensor circuitry must therefore be low to minimize power and hence the size requirements of the energy harvester. Harvesting electrical energy from thermal energy sources can be achieved using pyroelectric or thermoelectric conversion techniques. Recent modeling and experimental studies have shown that pyroelectric techniques can be cost competitive with thermoelectrics in self powered wireless sensor applications and, using new temperature cycling techniques, has the potential to be several times as efficient as thermoelectrics under comparable operating conditions. The development of a new thermal energy harvester concept, based on temperature cycled pyroelectric thermal-to-electrical energy conversion, is outlined. This paper outlines the modeling of cantilever and pyroelectric structures and single element devices that demonstrate the potential of this technology for the development of high efficiency thermal-to-electrical energy conversion devices.

  4. Envelope amplifier design for wireless base-station power amplifiers

    E-Print Network [OSTI]

    Hsia, Chin

    2010-01-01

    switching MOSFET, a Schottky diode and a power inductor. For comparator design, a high speed, low powerswitching frequency of the switchers will rise. This implies that a design trade-off between the switcher power

  5. Wireless power transfer for scaled electronic biomedical implants

    E-Print Network [OSTI]

    Theilmann, Paul Thomas

    2012-01-01

    System Model .. 105 3.3.1 Model Verification . 108 Summary . 112 References .. 113 Chapter 4 Low Power

  6. Wireless power transfer for scaled electronic biomedical implants

    E-Print Network [OSTI]

    Theilmann, Paul Thomas

    2012-01-01

    power generators for biomedical applications,” MicrosystSubretinal Neurostimulator," Biomedical Engineering, IEEEIntegration, and Evaluation," Biomedical Engineering, IEEE

  7. Stochastic Modeling and Power Control of Time-Varying Wireless Communication Networks

    SciTech Connect (OSTI)

    Olama, Mohammed M [ORNL; Djouadi, Seddik M [ORNL; Charalambous, Prof. Charalambos [University of Cyprus

    2014-01-01

    Wireless networks are characterized by nodes mobility, which makes the propagation environment time-varying and subject to fading. As a consequence, the statistical characteristics of the received signal vary continuously, giving rise to a Doppler power spectral density (DPSD) that varies from one observation instant to the next. This paper is concerned with dynamical modeling of time-varying wireless fading channels, their estimation and parameter identification, and optimal power control from received signal measurement data. The wireless channel is characterized using a stochastic state-space form and derived by approximating the time-varying DPSD of the channel. The expected maximization and Kalman filter are employed to recursively identify and estimate the channel parameters and states, respectively, from online received signal strength measured data. Moreover, we investigate a centralized optimal power control algorithm based on predictable strategies and employing the estimated channel parameters and states. The proposed models together with the estimation and power control algorithms are tested using experimental measurement data and the results are presented.

  8. Wirelessly Powered Bistable Display Tags Artem Dementyev1

    E-Print Network [OSTI]

    Hochberg, Michael

    to applications in which they are tethered to a power source or a large and frequently charged battery (NFC) technology that is being widely integrated across mobile phone platforms, to power display for a mobile phone that can be used to capture and preserve a screenshot. We also discuss other

  9. 1308 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 6, NO. 4, APRIL 2007 Battery Power Efficiency of PPM and FSK in

    E-Print Network [OSTI]

    Giannakis, Georgios

    to hundreds of meters. Because sensor nodes are typically powered by non- renewable batteries, energy1308 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 6, NO. 4, APRIL 2007 Battery Power. Giannakis, Fellow, IEEE, and Tuanfa Qin Abstract-- As sensor nodes are typically powered by non- renewable

  10. Load-Sensitive Transmission Power Control in Wireless Ad-hoc Networks Seung-Jong Park Raghupathy Sivakumar

    E-Print Network [OSTI]

    Sivakumar, Raghupathy

    transmis- sion power depends on several network characteristics such as the number of stations, the network problem in ad-hoc wireless networks. The transmission power of the stations in a network determines the network topol- ogy, The transmission power of the stations in a network deter- mines the network topology

  11. Energy Harvesting for Self-Powered Wireless Sensors 

    E-Print Network [OSTI]

    Wardlaw, Jason

    2012-02-14

    application in the proposed sensor system are undertaken and a low-power successive approximation register analog-to-digital converter (SAR ADC) is presented. The SAR ADC was fabricated and laboratory characterizations show the proposed low-voltage topology...

  12. Energy harvesting and wireless energy transmission for powering SHM sensor nodes

    SciTech Connect (OSTI)

    Taylor, Stuart G; Farinholt, Kevin M; Park, Gyuhae; Farrar, Charles R

    2009-01-01

    In this paper, we present a feasibility study of using energy harvesting and wireless energy transmission systems to operate SHM sensor nodes. The energy harvesting approach examines the use of kinetic energy harvesters to scavenge energy from the ambient sources. Acceleration measurements were made on a bridge, and serve as the basis for a series of laboratory experiments that replicate these sources using an electromagnetic shaker. We also investigated the use of wireless energy transmission systems to operate SHM sensor nodes. The goal of this investigation is to develop SHM sensing systems which can be permanently embedded in the host structure and do not require on-board power sources. This paper summarizes considerations needed to design such systems, experimental procedures and results, and additional issues that can be used as guidelines for future investigations.

  13. Power-Efficient Radio Configuration in Fixed Broadband Wireless Networks

    E-Print Network [OSTI]

    Bermond, Jean-Claude

    configuration; power-efficiency; multicommodity flow 1 #12;1 Introduction The increasing demand for high networks, particularly in emerg- ing countries and remote locations where classical copper or fiber lines are too costly or simply unavailable to cope with this demand [1, 2]. In this scenario, network operators

  14. Power Scheduling for Wireless Sensor and Actuator Networks

    E-Print Network [OSTI]

    Rozell, Christopher J.

    networks (WSN) has led to increased research in many areas central to distributed data processing to increase the functional lifespan of the WSN is very impor- tant because the battery-powered sensors may that needs to be passed to more distant nodes (e.g., [2,11,20,23]). Many WSN algorithms start

  15. Power management for wireless adapters using multiple feedback metrics

    E-Print Network [OSTI]

    % less energy consumption. In [23], a transport layer mechanism enables the interface periodically consumption has been proposed in [25], which improved energy efficiency by 32% in best case scenario. This mechanism measures the quality of the transmission and adjusts the transmission power accordingly

  16. SiC MOSFET Based Single Phase Active Boost Rectifier with Power Factor Correction for Wireless Power Transfer Applications

    SciTech Connect (OSTI)

    Onar, Omer C; Tang, Lixin; Chinthavali, Madhu Sudhan; Campbell, Steven L; Miller , John M.

    2014-01-01

    Wireless Power Transfer (WPT) technology is a novel research area in the charging technology that bridges the utility and the automotive industries. There are various solutions that are currently being evaluated by several research teams to find the most efficient way to manage the power flow from the grid to the vehicle energy storage system. There are different control parameters that can be utilized to compensate for the change in the impedance due to variable parameters such as battery state-of-charge, coupling factor, and coil misalignment. This paper presents the implementation of an active front-end rectifier on the grid side for power factor control and voltage boost capability for load power regulation. The proposed SiC MOSFET based single phase active front end rectifier with PFC resulted in >97% efficiency at 137mm air-gap and >95% efficiency at 160mm air-gap.

  17. Abstract--Power efficiency during heavy-and light-loading conditions in wireless portable applications is critical for

    E-Print Network [OSTI]

    Rincon-Mora, Gabriel A.

    and quiescent current flow during light loading conditions and (2) an adaptive PA bias-current generator1 Abstract-- Power efficiency during heavy- and light-loading conditions in wireless portable efficiency is improved with a 0.5-µm CMOS dynamically adaptive, dual-mode buck- boost power supply and bias

  18. Microwave and millimeter-wave rectifying circuit arrays and ultra-wideband antennas for wireless power transmission and communications 

    E-Print Network [OSTI]

    Ren, Yu-Jiun

    2009-05-15

    In the future, space solar power transmission and wireless power transmission will play an important role in gathering clean and infinite energy from space. The rectenna, i.e., a rectifying circuit combined with an antenna, is one of the most...

  19. Implementation Scenarios for Electric Vehicle Roadway Wireless Power Transfer; NREL (National Renewable Energy Laboratory)

    SciTech Connect (OSTI)

    Meintz, A.; Markel, T.; Burton, E.; Wang, L.; Gonder, J.; Brooker, A.

    2015-06-05

    Analysis has been performed on the Transportation Secure Data Center (TSDC) warehouse of collected GPS second-by-second driving profile data of vehicles in the Atlanta, Chicago, Fresno, Kansas City, Los Angeles, Sacramento, and San Francisco Consolidated Statistical Areas (CSAs) to understand in-motion wireless power transfer introduction scenarios. In this work it has been shown that electrification of 1% of road miles could reduce fuel use by 25% for Hybrid Electric Vehicles (HEVs) in these CSAs. This analysis of strategically located infrastructure offers a promising approach to reduced fuel consumption; however, even the most promising 1% of road miles determined by these seven analysis scenarios still represent an impressive 2,700 miles of roadway to electrify. Therefore to mitigate the infrastructure capital costs, integration of the grid-tied power electronics in the Wireless Power Transfer (WPT) system at the DC-link to photovoltaic and/or battery storage is suggested. The integration of these resources would allow for the hardware to provide additional revenue through grid services at times of low traffic volumes and conversely at time of high traffic volumes these resources could reduce the peak demand that the WPT system would otherwise add to the grid.

  20. Wireless Information and Power Transfer: Architecture Design and Rate-Energy Tradeoff

    E-Print Network [OSTI]

    Zhou, Xun; Ho, Chin Keong

    2012-01-01

    Simultaneous information and power transfer over the wireless channels potentially offers great convenience to mobile users. Yet practical receiver designs impose technical constraints on its hardware realization, as practical circuits for harvesting energy from radio signals are not yet able to decode the carried information directly. To make theoretical progress, we propose a general receiver operation, namely, dynamic power splitting (DPS), which splits the received signal with adjustable power for energy harvesting and for information decoding. Moreover, we propose two types of practical receiver architectures, namely, separated versus integrated information and energy receivers. The integrated receiver integrates the front-end components of the separated receiver, thus achieving a smaller form factor. The rateenergy tradeoff for these two architectures are characterized by a so-called rate-energy (R-E) region. Numerical results show that the R-E region of the integrated receiver is superior to that of th...

  1. Throughput Optimal Policies for Energy Harvesting Wireless Transmitters with Non-Ideal Circuit Power

    E-Print Network [OSTI]

    Xu, Jie

    2012-01-01

    Characterizing the fundamental tradeoffs for maximizing energy efficiency (EE) versus spectrum efficiency (SE) is a key problem in wireless communication. In this paper, we address this problem for a point-to-point additive white Gaussian noise (AWGN) channel with the transmitter powered solely via energy harvesting from the environment. In addition, we assume a practical on-off transmitter model with non-ideal circuit power, i.e., when the transmitter is on, its consumed power is the sum of the transmit power and a constant circuit power. Under this setup, we study the optimal transmit power allocation to maximize the average throughput over a finite horizon, subject to the time-varying energy constraint and the non-ideal circuit power consumption. First, we consider the off-line optimization under the assumption that the energy arrival time and amount are a priori known at the transmitter. Although this problem is non-convex due to the non-ideal circuit power, we show an efficient optimal solution that in g...

  2. An Ultra-Low-Power Power Management IC for Wireless Sensor Nodes

    E-Print Network [OSTI]

    Sanders, Seth

    -averaged power consumption of 6 µW. Peak powers of several mW are required. The performance of a self-powered WSN while minimizing power consumption. The converters achieve efficiencies approaching 80%. I. INTRODUCTION at very low duty cycles to minimize power consumption. In the TPS application, tire pressure is measured

  3. Oak Ridge National Laboratory Wireless Power Transfer Development for Sustainable Campus Initiative

    SciTech Connect (OSTI)

    Onar, Omer C; Miller, John M; Campbell, Steven L; Coomer, Chester; White, Cliff P; Seiber, Larry Eugene

    2013-01-01

    Wireless power transfer (WPT) is a convenient, safe, and autonomous means for electric and plug-in hybrid electric vehicle charging that has seen rapid growth in recent years for stationary applications. WPT does not require bulky contacts, plugs, and wires, is not affected by dirt or weather conditions, and is as efficient as conventional charging systems. This study summarizes some of the recent Sustainable Campus Initiative activities of Oak Ridge National Laboratory (ORNL) in WPT charging of an on-campus vehicle (a Toyota Prius plug-in hybrid electric vehicle). Laboratory development of the WPT coils, high-frequency power inverter, and overall systems integration are discussed. Results cover the coil performance testing at different operating frequencies, airgaps, and misalignments. Some of the experimental results of insertion loss due to roadway surfacing materials in the air-gap are presented. Experimental lessons learned are also covered in this study.

  4. High efficient wireless power transfer devices transcend the distance constraint: methodology inspired from transformation optics

    E-Print Network [OSTI]

    Zhu, Lin; Ma, Hongru

    2015-01-01

    We introduce a methodology to design high efficient wireless power transfer(WPT) devices inspired by transformation optics theory, and calculate its transmission power and efficiency by the scattering theory for electromagnetic (EM) wave. Using the series expansion methods, we demonstrate the WPT devices' transmission efficiency can be significantly improved by covered with super scatterer. The comparison with those results obtained by COMSOL shows the series expansion method is effective and expected to deal with long-distance transfer problem. We present some examples to exam our methodology, and showed how WPT devices' efficiency is significantly improved as our expectation. The transfer distances of such WPT devices are several meters and can be widely extended by regulating its parameters.

  5. About Lunars, part 3

    E-Print Network [OSTI]

    George Huxtable

    2010-03-06

    The difference with a lunar is that the observer is not measuring an altitude, straight .... symbol ^2 means "to the power 2", or more simply "squared". ...... last summer, over a period of about 1 hour, at a time when the Moon was quite high in the ..... wind. If wind is a problem, surround the tray with a wind-break, or even cover it ...

  6. Grant to Send: Fairness and Isolation in Low-Power Wireless Technical Report SING-06-01

    E-Print Network [OSTI]

    Levis, Philip

    energy efficiency. 1. Introduction Deciding when to transmit a packet is one of the funda- mentalGrant to Send: Fairness and Isolation in Low-Power Wireless Technical Report SING-06-01 Jung Il and tight energy budgets make every packet precious and idle lis- tening time a luxury. In sensornets

  7. A Power-Saving Multi-radio Multi-channel MAC Protocol for Wireless Local Area Networks

    E-Print Network [OSTI]

    Fang, Yuguang "Michael"

    , delay performance, and energy efficiency for wireless networks. In this paper, we consider the joint energy consumption. To address this problem, we propose a power-saving multi-channel MAC protocol (PSM of a node, resulting in improved throughput, delay performance, and energy efficiency. The key ideas of PSM

  8. A SiC MOSFET Based Inverter for Wireless Power Transfer Applications

    SciTech Connect (OSTI)

    Onar, Omer C [ORNL] [ORNL; Chinthavali, Madhu Sudhan [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Ning, Puqi [Chinese Academy of Sciences (CAS)] [Chinese Academy of Sciences (CAS); White, Cliff P [ORNL] [ORNL; Miller (JNJ), John M. [JNJ-Miller PLC] [JNJ-Miller PLC

    2014-01-01

    In a wireless power transfer (WPT) system, efficiency of the power conversion stages is crucial so that the WPT technology can compete with the conventional conductive charging systems. Since there are 5 or 6 power conversion stages, each stage needs to be as efficient as possible. SiC inverters are crucial in this case; they can handle high frequency operation and they can operate at relatively higher temperatures resulting in reduces cost and size for the cooling components. This study presents the detailed power module design, development, and fabrication of a SiC inverter. The proposed inverter has been tested at three center frequencies that are considered for the WPT standardization. Performance of the inverter at the same target power transfer level is analyzed along with the other system components. In addition, another SiC inverter has been built in authors laboratory by using the ORNL designed and developed SiC modules. It is shown that the inverter with ORNL packaged SiC modules performs simular to that of the inverter having commercially available SiC modules.

  9. High-power microwave LDMOS transistors for wireless data transmission technologies (Review)

    SciTech Connect (OSTI)

    Kuznetsov, E. V., E-mail: E.Kouzntsov@tcen.ru; Shemyakin, A. V. [Moscow Institute of Electronic Technology, SMC Technological Center (Russian Federation)

    2010-12-15

    The fields of the application, structure, fabrication, and packaging technology of high-power microwave LDMOS transistors and the main advantages of these devices were analyzed. Basic physical parameters and some technology factors were matched for optimum device operation. Solid-state microwave electronics has been actively developed for the last 10-15 years. Simultaneously with improvement of old devices, new devices and structures are actively being adopted and developed and new semiconductor materials are being commercialized. Microwave LDMOS technology is in demand in such fields as avionics, civil and military radars, repeaters, base stations of cellular communication systems, television and broadcasting transmitters, and transceivers for high-speed wireless computer networks (promising Wi-Fi and Wi-Max standards).

  10. Impact of Wireless Power Transfer in Transportation: Future Transportation Enabler, or Near Term Distraction

    SciTech Connect (OSTI)

    Onar, Omer C; Jones, Perry T

    2014-01-01

    While the total liquid fuels consumed in the U.S. for transportation of goods and people is expected to hold steady, or decline slightly over the next few decades, the world wide consumption is projected to increase of over 30% according to the Annual Energy Outlook 2014 [1]. The balance of energy consumption for transportation between petroleum fuels and electric energy, and the related greenhouse gas (GHG) emissions produced consuming either, is of particular interest to government administrations, vehicle OEMs, and energy suppliers. The market adoption of plug-in electric vehicles (PEVs) appears to be inhibited by many factors relating to the energy storage system (ESS) and charging infrastructure. Wireless power transfer (WPT) technologies have been identified as a key enabling technology to increase the acceptance of EVs. Oak Ridge National Laboratory (ORNL) has been involved in many research areas related to understanding the impacts, opportunities, challenges and costs related to various deployments of WPT technology for transportation use. Though the initial outlook for WPT deployment looks promising, many other emerging technologies have met unfavorable market launches due to unforeseen technology limitations, sometimes due to the complex system in which the new technology was placed. This paper will summarize research and development (R&D) performed at ORNL in the area of Wireless Power Transfer (WPT). ORNL s advanced transportation technology R&D activities provide a unique set of experienced researchers to assist in the creation of a transportation system level view. These activities range from fundamental technology development at the component level to subsystem controls and interactions to applicable system level analysis of impending market and industry responses and beyond.

  11. EV Charging Through Wireless Power Transfer: Analysis of Efficiency Optimization and Technology Trends

    SciTech Connect (OSTI)

    Miller, John M; Rakouth, Heri; Suh, In-Soo

    2012-01-01

    This paper is aimed at reviewing the technology trends for wireless power transfer (WPT) for electric vehicles (EV). It also analyzes the factors affecting its efficiency and describes the techniques currently used for its optimization. The review of the technology trends encompasses both stationary and moving vehicle charging systems. The study of the stationary vehicle charging technology is based on current implementations and on-going developments at WiTricity and Oak Ridge National Lab (ORNL). The moving vehicle charging technology is primarily described through the results achieved by the Korean Advanced Institute of Technology (KAIST) along with on-going efforts at Stanford University. The factors affecting the efficiency are determined through the analysis of the equivalent circuit of magnetic resonant coupling. The air gap between both transmitting and receiving coils along with the magnetic field distribution and the relative impedance mismatch between the related circuits are the primary factors affecting the WPT efficiency. Currently the industry is looking at an air gap of 25 cm or below. To control the magnetic field distribution, Kaist has recently developed the Shaped Magnetic Field In Resonance (SMFIR) technology that uses conveniently shaped ferrite material to provide low reluctance path. The efficiency can be further increased by means of impedance matching. As a result, Delphi's implementation of the WiTricity's technology exhibits a WPT efficiency above 90% for stationary charging while KAIST has demonstrated a maximum efficiency of 83% for moving vehicle with its On Line Vehicle (OLEV) project. This study is restricted to near-field applications (short and mid-range) and does not address long-range technology such as microwave power transfer that has low efficiency as it is based on radiating electromagnetic waves. This paper exemplifies Delphi's work in powertrain electrification as part of its innovation for the real world program geared toward a safer, greener and more connected driving. Moreover, it draws from and adds to Dr. Andrew Brown Jr.'s SAE books 'Active Safety and the Mobility Industry', 'Connectivity and Mobility Industry', and 'Green Technologies and the Mobility Industry'. Magnetic resonant coupling is the foundation of modern wireless power transfer. Its efficiency can be controlled through impedance matching and magnetic field shaping. Current implementations use one or both of these control methods and enable both stationary and mobile charging with typical efficiency within the 80% and 90% range for an air gap up to 25 cm.

  12. Data-Semantics Driven Power Optimization of Wireless Medical Monitoring Devices

    E-Print Network [OSTI]

    Goudar, Vishwatma Arun

    2013-01-01

    in Wireless Sensor Network (WSN) performance and applicationsignificantly more sensors than a WSN node. Further, as wehave also migrated from WSN to BAN applications, al- beit in

  13. uncorrectedproof Wireless Pers Commun

    E-Print Network [OSTI]

    Liu, K. J. Ray

    uncorrectedproof Wireless Pers Commun DOI 10.1007/s11277-007-9359-z Cooperative Communication Protocols in Wireless Networks: Performance Analysis and Optimum Power Allocation Weifeng Su · Ahmed K communications in wireless networks with2 either decode-and-forward (DF) or amplify-and-forward (AF) cooperation

  14. THE PLATFORMS ENABLING WIRELESS

    E-Print Network [OSTI]

    Scheuermann, Peter

    THE PLATFORMS ENABLING WIRELESS SENSOR NETWORKS By Jason Hill, Mike Horton, Ralph Kling always-on power requirements. Unlike cell phones and wireless laptops, periodic recharging is not possible for most wireless sensor net- works. In many cases, devices are placed in the field for years

  15. Wireless Self-powered Visual and NDE Robotic Inspection System for Live Gas Distribution Mains

    SciTech Connect (OSTI)

    Susan Burkett; Hagen Schempf

    2006-01-31

    Carnegie Mellon University (CMU) under contract from Department of Energy/National Energy Technology Laboratory (DoE/NETL) and co-funding from the Northeast Gas Association (NGA), has completed the overall system design of the next-generation Explorer-II (X-II) live gas main NDE and visual inspection robot platform. The design is based on the Explorer-I prototype which was built and field-tested under a prior (also DoE- and NGA co-funded) program, and served as the validation that self-powered robots under wireless control could access and navigate live natural gas distribution mains. The X-II system design ({approx}8 ft. and 66 lbs.) was heavily based on the X-I design, yet was substantially expanded to allow the addition of NDE sensor systems (while retaining its visual inspection capability), making it a modular system, and expanding its ability to operate at pressures up to 750 psig (high-pressure and unpiggable steel-pipe distribution mains). A new electronics architecture and on-board software kernel were added to again improve system performance. A locating sonde system was integrated to allow for absolute position-referencing during inspection (coupled with external differential GPS) and emergency-locating. The power system was upgraded to utilize lithium-based battery-cells for an increase in mission-time. The system architecture now relies on a dual set of end camera-modules to house the 32-bit processors (Single-Board Computer or SBC) as well as the imaging and wireless (off-board) and CAN-based (on-board) communication hardware and software systems (as well as the sonde-coil and -electronics). The drive-module (2 ea.) are still responsible for bracing (and centering) to drive in push/pull fashion the robot train into and through the pipes and obstacles. The steering modules and their arrangement, still allow the robot to configure itself to perform any-angle (up to 90 deg) turns in any orientation (incl. vertical), and enable the live launching and recovery of the system using custom fittings and a (to be developed) launch-chamber/-tube. The battery modules are used to power the system, by providing power to the robot's bus. The support modules perform the functions of centration for the rest of the train as well as odometry pickups using incremental encoding schemes. The electronics architecture is based on a distributed (8-bit) microprocessor architecture (at least 1 in ea. module) communicating to a (one of two) 32-bit SBC, which manages all video-processing, posture and motion control as well as CAN and wireless communications. The operator controls the entire system from an off-board (laptop) controller, which is in constant wireless communication with the robot train in the pipe. The sensor modules collect data and forward it to the robot operator computer (via the CAN-wireless communications chain), who then transfers it to a dedicated NDE data-storage and post-processing computer for further (real-time or off-line) analysis. CMU has fully designed every module in terms of the mechanical, electrical and software elements (architecture only). Substantial effort has gone into pre-prototyping to uncover mechanical, electrical and software issues for critical elements of the design. Design requirements for sensor-providers were also detailed and finalized and provided to them for inclusion in their designs. CMU is expecting to start 2006 with a detailed design effort for both mechanical and electrical components, followed by procurement and fabrication efforts in late winter/spring 2006. The assembly and integration efforts will occupy all of the spring and summer of 2006. Software development will also be a major effort in 2006, and will result in porting and debugging of code on the module- and train-levels in late summer and Fall of 2006. Final pipe mock-up testing is expected in late fall and early winter 2006 with an acceptance demonstration of the robot train (with a sensor-module mock-up) planned to DoE/NGA towards the end of 2006.

  16. Design and Simulation of Power-Aware Scheduling Strategies of Streaming Data in Wireless LANs

    E-Print Network [OSTI]

    Bogliolo, Alessandro

    . INTRODUCTION Supporting wireless local area network (WLAN) connec- tivity may cost up to 60% of the energy Andrea Acquaviva Emanuele Lattanzi Alessandro Bogliolo Information Science and Technology Institute (STI concerns for 802.11b wireless local area networks is energy efficiency. In fact, mobile devices spend

  17. PREDICTIVE POWER CONTROL FOR DYNAMIC STATE ESTIMATION OVER WIRELESS SENSOR NETWORKS WITH RELAYS

    E-Print Network [OSTI]

    for state estimation of a stationary ARMA process over a wireless sensor network (WSN), consisting of sensor networks for a widespread of ap- plications, e.g., target-tracking and data acquisition [5,15]. A WSN energy. The wireless communication channel between nodes in the WSN is subject to fading, which

  18. High-Density Wireless Neural Recording System

    E-Print Network [OSTI]

    Chae, Moo Sung

    2013-01-01

    A 4-channel Wearable Wireless Neural Recording System,” inand J.C. Principe, “Wireless, In Vivo Neural Recording usingPower Integrated Circuit for a Wireless 100-Electrode Neural

  19. 910 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 5, NO. 4, APRIL 2006 QoS Guarantee and Power Distribution for Soft

    E-Print Network [OSTI]

    Shen, Xuemin "Sherman"

    base stations (BSs) in order to accommodate more connections. The proposed power distribution scheme stations (BSs) for all other connec- tions sharing the same system. A higher level transmission power910 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 5, NO. 4, APRIL 2006 QoS Guarantee and Power

  20. Accepted for publication in Wireless Networks, Special Issue on Multiuser Detection in Wireless Communications Adaptive Power Control and MMSE Interference

    E-Print Network [OSTI]

    Yates, Roy

    with an acceptable quality of service while minimizing the total transmitter power. Multiuser detection on the other communication systems, iterative power control is used to provide each user with an acceptable level and interference. In [10], a framework was given for uplink power control for cellular radio systems. Variations

  1. Using Wireless Power Meters to Measure Energy Use of Miscellaneous and Electronic Devices in Buildings

    SciTech Connect (OSTI)

    UC Berkeley, Berkeley, CA USA; Brown, Richard; Lanzisera, Steven; Cheung, Hoi Ying; Lai, Judy; Jiang, Xiaofan; Dawson-Haggerty, Stephen; Taneja, Jay; Ortiz, Jorge; Culler, David

    2011-05-24

    Miscellaneous and electronic devices consume about one-third of the primary energy used in U.S. buildings, and their energy use is increasing faster than other end-uses. Despite the success of policies, such as Energy Star, that promote more efficient miscellaneous and electronic products, much remains to be done to address the energy use of these devices if we are to achieve our energy and carbon reduction goals. Developing efficiency strategies for these products depends on better data about their actual usage, but very few studies have collected field data on the long-term energy used by a large sample of devices due to the difficulty and expense of collecting device-level energy data. This paper describes the development of an improved method for collecting device-level energy and power data using small, relatively inexpensive wireless power meters. These meters form a mesh network based on Internet standard protocols and can form networks of hundreds of metering points in a single building. Because the meters are relatively inexpensive and do not require manual data downloading, they can be left in the field for months or years to collect long time-series energy use data. In addition to the metering technology, we also describe a field protocol used to collect comprehensive, robust data on the miscellaneous and electronic devices in a building. The paper presents sample results from several case study buildings, in which all the plug-in devices for several homes were metered, and a representative sample of several hundred plug-in devices in a commercial office building were metered for several months.

  2. Minimum Energy Transmission Over a Wireless Channel With Deadline and Power Constraints

    E-Print Network [OSTI]

    Zafer, Murtaza

    We consider optimal rate-control for energy-efficient transmission of data, over a time-varying channel, with packet-deadline constraints. Specifically, the problem scenario consists of a wireless transmitter with B units ...

  3. Wireless data acquisition system for multi-phase electric power equipment 

    E-Print Network [OSTI]

    Goodsell, Douglas Andreas

    2009-05-15

    to the equipment. If these data acqusistion modules are accessible wirelessly, then one can monitor all the interfaced equipment from a central location. To successfully monitor such electrical equipment, a data acquisition unit is required that can sample on five...

  4. Lower power RF transceiver modeling and design for wireless microsensor networks

    E-Print Network [OSTI]

    Wang, Andrew Yu, 1976-

    2005-01-01

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

  5. On optimizing wireless mesh networks : from theoretical capacity analysis to practical algorithm design

    E-Print Network [OSTI]

    Zhou, Ping

    2008-01-01

    Transmission Strategies for Wireless Devices,” in Proc. ofand Power Control for Wireless Ad-hoc Networks," in Proc. offor ad hoc mobile wireless networks," IEEE Personal

  6. Energy efficiency in wireless networks 

    E-Print Network [OSTI]

    Jung, Eun-Sun

    2005-11-01

    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...

  7. American Institute of Aeronautics and Astronautics Smart Power Management for an Onboard Wireless Sensors

    E-Print Network [OSTI]

    Kuzmanov, Georgi

    Sensors and Actuators Network R. Amini* , G. Gaydadjiev and E. Gill Delft University of Technology, Delft determination and control sensors and actuators. Still, providing energy efficient data collection is of paramount importance to such an onboard wireless sensors and actuators network (OWSAN). This paper proposes

  8. 156 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 14, NO. 4, APRIL 2004 An Ultra-Low Power InAs/AlSb HEMT Ka-Band

    E-Print Network [OSTI]

    Rodwell, Mark J. W.

    156 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 14, NO. 4, APRIL 2004 An Ultra-Low Power dc power dissipation of the ABCS LNA was an ultra-low 1.5 mW per stage, or 4.5 mW total. This is less amplifier, mil- limeter-waves. I. INTRODUCTION ULTRA-LOW power millimeter-wave low-noise am- plifiers (LP

  9. Powering mm-Size Wireless Implants for Brain-Machine Interfaces

    E-Print Network [OSTI]

    Mark, Michael

    2011-01-01

    be another way of trading input power for rectificationbe chosen, trading off available power for a more efficientTrading-off channel loss for increased transmit power as

  10. Adaptive Transmit Power Control in IEEE 802.11aWirelessLANs Daji Qiao+ Sunghyun Choi' Amit Jainf Kang G. Shin+

    E-Print Network [OSTI]

    Qiao, Daji

    recognized asone of the effectiveways to save energy in wireless devices. In this paper, we demonstrate exchange before each data transmission, and then selectthe most energy-efficientcombination of the PHY mode and the transmit power level far the subsequentdata frametransmission to save energy. The performance

  11. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 60, NO. 7, JULY 2012 2277 Low-Power Wireless Power Delivery

    E-Print Network [OSTI]

    Popovic, Zoya

    of incident power levels are RF identifications (RFIDs) and power beaming. In RFIDs, an interrogating RF wave transmits a plane wave incident on a rectenna element or array (RF power re- ceiver). Following the potential for maintenance-free operation. This paper focuses on a methodology for designing low-power

  12. LUNAR SOIL SIMULATION TRAFFICABILITY PARAMETERS

    E-Print Network [OSTI]

    Rathbun, Julie A.

    LUNAR SOIL SIMULATION and TRAFFICABILITY PARAMETERS by W. David Carrier, III Lunar Geotechnical.0 RECOMMENDED LUNAR SOIL TRAFFICABILITY PARAMETERS Table 9.14 in the Lunar Sourcebook (Carrier et al. 1991, p. 529) lists the current recommended lunar soil trafficability parameters: bc = 0.017 N/cm2 bN = 35° K

  13. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, ACCEPTED FOR PUBLICATION 1 An Auction Approach to Distributed Power

    E-Print Network [OSTI]

    Tao, Meixia "Melissa"

    much power to reserve for its own transmission, how much power to purchase from other users, and how to Distributed Power Allocation for Multiuser Cooperative Networks Yuan Liu, Student Member, IEEE, Meixia Tao goal is to design an optimal distributed power allocation algorithm that enables user cooperation

  14. A System-Level Analysis of a Wireless Low-Power Biosignal Recording Device

    E-Print Network [OSTI]

    Chandler, Rodney James

    2012-01-01

    switching activity estimates for the design. These estimates were then annotated into the synthesis flow to obtain power

  15. High efficiency wideband envelope tracking power amplifier for next-generation wireless communications

    E-Print Network [OSTI]

    Kwak, Myoungbo

    2011-01-01

    design, the switching stage is sized to achieve minimum powercircuit design. The power loss of the switching- FETs in the

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

    E-Print Network [OSTI]

    Tavakoli, Arsalan

    2009-01-01

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

  17. Optimal Power Allocation Auction for H.264/SVC Coded Wireless Video Transmission

    E-Print Network [OSTI]

    Jagannatham, Aditya K.

    quality based auction bidding models. The framework for optimal power allocation is formulated in an OFDMA system. Typical power allocation schemes existing in literature such as those based on the water that are suited to the scenarios of high quality video transmission. Towards this purpose we propose a power

  18. Optimal Resource Allocation for Wireless Video Sensors with Power-Rate-Distortion Model of Imager

    E-Print Network [OSTI]

    Heinzelman, Wendi

    role in the resulting video quality as well as in the life-time of the system. The problem of power (WVSs), including the image sensor subsystem into the system analysis. By assigning a power quality under power and rate constraints. To demonstrate the optimization method, we further establish a P

  19. Special Section on: Dynamic Charging of Electric Vehicles by Wireless

    E-Print Network [OSTI]

    Mi, Chunting "Chris"

    Special Section on: Dynamic Charging of Electric Vehicles by Wireless Power Transfer I N RECENT TIMES, wireless power charging of electric vehicles (EV) has gained huge attentions. Static wireless charging systems Mass transit electrification (electric trains, trams, and buses) us- ing dynamic wireless

  20. Moon's Radiation Environment and Expected Performance of Solar Cells during Future Lunar Missions

    E-Print Network [OSTI]

    T. E Girish; S Aranya

    2010-12-03

    Several lunar missions are planned ahead and there is an increasing demand for efficient photovoltaic power generation in the moon. The knowledge of solar cell operation in the lunar surface obtained during early seventies need to be updated considering current views on solar variability and emerging space solar cell technologies. In this paper some aspects of the solar cell performance expected under variable lunar radiation environment during future space missions to moon are addressed. We have calculated relative power expected from different types of solar cells under extreme solar proton irradiation conditions and high lunar daytime temperature. It is also estimated that 2-3 % of annual solar cell degradation is most probable during the future lunar missions. We have also discussed photovoltaic power generation in long term lunar bases emphasizing technological needs such as sunlight concentration, solar cell cooling and magnetic shielding of radiation for improving the efficiency of solar cells in the lunar environment.

  1. Explorer-II: Wireless Self-Powered Visual and NDE Robotic Inspection System for Live Gas Distribution Mains

    SciTech Connect (OSTI)

    Carnegie Mellon University

    2008-09-30

    Carnegie Mellon University (CMU) under contract from Department of Energy/National Energy Technology Laboratory (DoE/NETL) and co-funding from the Northeast Gas Association (NGA), has completed the overall system design, field-trial and Magnetic Flux Leakage (MFL) sensor evaluation program for the next-generation Explorer-II (X-II) live gas main Non-destructive Evaluation (NDE) and visual inspection robot platform. The design is based on the Explorer-I prototype which was built and field-tested under a prior (also DoE- and NGA co-funded) program, and served as the validation that self-powered robots under wireless control could access and navigate live natural gas distribution mains. The X-II system design ({approx}8 ft. and 66 lbs.) was heavily based on the X-I design, yet was substantially expanded to allow the addition of NDE sensor systems (while retaining its visual inspection capability), making it a modular system, and expanding its ability to operate at pressures up to 750 psig (high-pressure and unpiggable steel-pipe distribution mains). A new electronics architecture and on-board software kernel were added to again improve system performance. A locating sonde system was integrated to allow for absolute position-referencing during inspection (coupled with external differential GPS) and emergency-locating. The power system was upgraded to utilize lithium-based battery-cells for an increase in mission-time. The resulting robot-train system with CAD renderings of the individual modules. The system architecture now relies on a dual set of end camera-modules to house the 32-bit processors (Single-Board Computer or SBC) as well as the imaging and wireless (off-board) and CAN-based (on-board) communication hardware and software systems (as well as the sonde-coil and -electronics). The drive-module (2 ea.) are still responsible for bracing (and centering) to drive in push/pull fashion the robot train into and through the pipes and obstacles. The steering modules and their arrangement, still allow the robot to configure itself to perform any-angle (up to 90 deg) turns in any orientation (incl. vertical), and enable the live launching and recovery of the system using custom fittings and a (to be developed) launch-chamber/-tube. The battery modules are used to power the system, by providing power to the robot's bus. The support modules perform the functions of centration for the rest of the train as well as odometry pickups using incremental encoding schemes. The electronics architecture is based on a distributed (8-bit) microprocessor architecture (at least 1 in ea. module) communicating to a (one of two) 32-bit SBC, which manages all video-processing, posture and motion control as well as CAN and wireless communications. The operator controls the entire system from an off-board (laptop) controller, which is in constant wireless communication with the robot train in the pipe. The sensor modules collect data and forward it to the robot operator computer (via the CAN-wireless communications chain), who then transfers it to a dedicated NDE data-storage and post-processing computer for further (real-time or off-line) analysis. The prototype robot system was built and tested indoors and outdoors, outfitted with a Remote-Field Eddy Current (RFEC) sensor integrated as its main NDE sensor modality. An angled launcher, allowing for live launching and retrieval, was also built to suit custom angled launch-fittings from TDW. The prototype vehicle and launcher systems are shown. The complete system, including the in-pipe robot train, launcher, integrated NDE-sensor and real-time video and control console and NDE-data collection and -processing and real-time display, were demonstrated to all sponsors prior to proceeding into final field-trials--the individual components and setting for said acceptance demonstration are shown. The launcher-tube was also used to verify that the vehicle system is capable of operating in high-pressure environments, and is safely deployable using proper evacuating/purging techniques for operation in the po

  2. Optimal Power Scheduling for Correlated Data Fusion in Wireless Sensor Networks Via

    E-Print Network [OSTI]

    Jayaweera, Sudharman K.

    in many WSN applications over the centralized approach since it drastically reduces communication resource power WSN is limited by resource constraints, namely power and bandwidth. In a typical WSN is considered to be a core issue in designing a WSN. A. Related work The problem of distributed detection

  3. Frontispiece Advanced Lunar Base

    E-Print Network [OSTI]

    Rathbun, Julie A.

    inhabitants may use chemical reactors to combine hydrogen brought from Earth with oxygen found in lunar soil to make their water. The pioneers sought temporary shelter under trees or in the lee of a cliff and built for their shelter or cover space station modules with lunar regolith for radiation protection. The pioneers moved

  4. Powering mm-Size Wireless Implants for Brain-Machine Interfaces

    E-Print Network [OSTI]

    Mark, Michael

    2011-01-01

    4 Proof-of-Concept: A 1 mm 3 Neural Transponder Linkfor power transfer to a 1 x 1 mm 2 implanted antenna withantenna with a diameter of 15 mm and a 1 mm 2 implant

  5. Digital Control of RF Power Amplifiers for Next-Generation Wireless

    E-Print Network [OSTI]

    Asbeck, Peter M.

    systems for many years to come, multi- mode/multi-band mobile terminals will be required. This evolution and since a cell phone transmits roughly 30 dBm, any inefficiency in the power amplifier is one of the major

  6. Using Wireless Power Meters to Measure Energy Use of Miscellaneous and Electronic Devices in Buildings

    E-Print Network [OSTI]

    Brown, Richard

    2012-01-01

    of collecting device-level energy data. This paper describescollects the power and energy data, stores it in a database,collect whole-building energy data to calculate the fraction

  7. A Conformal 10 GHz Rectenna for Wireless Powering of Piezoelectric Sensor Electronics

    E-Print Network [OSTI]

    Popovic, Zoya

    acquisition. Currently, similar monitoring systems use batteries, magnetic coupling or solar cells to power and circuits from incident microwave radiation. This paper summarizes the single rectenna element design, array

  8. Unmanned Aerial Vehicle (UAV) Dynamic-Tracking Directional Wireless Antennas for Low Powered Applications that Require Reliable Extended Range Operations in Time Critical Scenarios

    SciTech Connect (OSTI)

    Scott G. Bauer; Matthew O. Anderson; James R. Hanneman

    2005-10-01

    The proven value of DOD Unmanned Aerial Vehicles (UAVs) will ultimately transition to National and Homeland Security missions that require real-time aerial surveillance, situation awareness, force protection, and sensor placement. Public services first responders who routinely risk personal safety to assess and report a situation for emergency actions will likely be the first to benefit from these new unmanned technologies. ‘Packable’ or ‘Portable’ small class UAVs will be particularly useful to the first responder. They require the least amount of training, no fixed infrastructure, and are capable of being launched and recovered from the point of emergency. All UAVs require wireless communication technologies for real- time applications. Typically on a small UAV, a low bandwidth telemetry link is required for command and control (C2), and systems health monitoring. If the UAV is equipped with a real-time Electro-Optical or Infrared (EO/Ir) video camera payload, a dedicated high bandwidth analog/digital link is usually required for reliable high-resolution imagery. In most cases, both the wireless telemetry and real-time video links will be integrated into the UAV with unity gain omni-directional antennas. With limited on-board power and payload capacity, a small UAV will be limited with the amount of radio-frequency (RF) energy it transmits to the users. Therefore, ‘packable’ and ‘portable’ UAVs will have limited useful operational ranges for first responders. This paper will discuss the limitations of small UAV wireless communications. The discussion will present an approach of utilizing a dynamic ground based real-time tracking high gain directional antenna to provide extend range stand-off operation, potential RF channel reuse, and assured telemetry and data communications from low-powered UAV deployed wireless assets.

  9. A Wireless Powered Implantable Bio-Sensor Tag System-on-Chip for Continuous Glucose Monitoring

    E-Print Network [OSTI]

    Mason, Andrew

    and a digital baseband (Fig. 1). The high frequency tag works passively and gain power from the RF energy of blood sugar level from the bio-sensor is detected and converted into digital data, and then the data of the reader. The high frequency band is selected since it is an industrial-scientific- medical (ISM) frequency

  10. Low-Power Wireless Medical Systems and Circuits for Invasive and Non-Invasive Applications 

    E-Print Network [OSTI]

    Gaxiola-Sosa, Jesus Efrain

    2014-04-23

    .5 µm standard process with an effective area of 360 µm2. Experimental results show a pass-band gain of 40.2 dB (240 mHz - 170 Hz), input referred noise of 0.47 Vrms, minimum CMRR of 84.3 dBm, NEF of 1.88 and a power dissipation of 3.5 µW. The CSF...

  11. Wireless Sensing for Structural Health Monitoring of Civil Infrastructures

    E-Print Network [OSTI]

    Stanford University

    in southern New Mexico. With wireless radios consuming large amounts of power, energy preservation can1 Wireless Sensing for Structural Health Monitoring of Civil Infrastructures J.P. Lynch1 , Y. Wang2-cost wireless sensing unit for installation in structural monitoring systems. The prototype wireless sensing

  12. Wireless power transfer electric vehicle supply equipment installation and validation tool

    DOE Patents [OSTI]

    Jones, Perry T.; Miller, John M.

    2015-05-19

    A transmit pad inspection device includes a magnetic coupling device, which includes an inductive circuit that is configured to magnetically couple to a primary circuit of a charging device in a transmit pad through an alternating current (AC) magnetic field. The inductive circuit functions as a secondary circuit for a set of magnetically coupled coils. The magnetic coupling device further includes a rectification circuit, and includes a controllable load bank or is configured to be connected to an external controllable load back. The transmit pad inspection device is configured to determine the efficiency of power transfer under various coupling conditions. In addition, the transmit pad inspection device can be configured to measure residual magnetic field and the frequency of the input current, and to determine whether the charging device has been installed properly.

  13. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 10, NO. 2, FEBRUARY 2011 407 Outage Probability and Optimum Power Allocation for

    E-Print Network [OSTI]

    Kim, Il-Min

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 10, NO. 2, FEBRUARY 2011 407 Outage Probability-duplex mode. For this system, we first derive a tight lower bound of outage probability, which is very close to the exact outage probability in the whole signal-to-noise ratio (SNR) range irrespective of the values

  14. Energy Ef cient Routing With Unreliable Links in Wireless Networks

    E-Print Network [OSTI]

    Li, Xiang-Yang

    Energy Ef cient Routing With Unreliable Links in Wireless Networks Xiang-Yang Li Dept. of Compt24@iit.edu Abstract Energy ef cient routings and power control tech- niques in wireless networks have wireless link layers by integrating the power control techniques into the energy ef cient routing. We study

  15. Minimum Energy Broadcast and Disk Cover in Grid Wireless Networks

    E-Print Network [OSTI]

    Calamoneri, Tiziana

    on the energy power supplied to the station. In particular, the power Ps required by a station s to Research assignment for a given set S of n stations of an ad hoc wireless network that allows a source station-hoc wireless network consists of a set S of radio stations connected by wireless links. We assume that stations

  16. 4 IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS, VOL. 3, NO. 1, MARCH 2015 Wireless Power Transfer for Electric

    E-Print Network [OSTI]

    Mi, Chunting "Chris"

    make the WPT very attractive to the electric vehicle (EV) charging applications in both stationary and dynamic charging scenarios. This paper reviewed the technologies in the WPT area applicable to EV wireless charging. By introducing WPT in EVs, the obstacles of charging time, range, and cost can be easily

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

    E-Print Network [OSTI]

    Hoelscher, David Louis

    2009-05-15

    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...

  18. Multi-hop routing for wireless mesh networks

    E-Print Network [OSTI]

    Bhorkar, Abhijeet

    2012-01-01

    of mesh routers to transport the traffic of wireless clientchosen among mesh routers. Wireless mesh backbone can bewireless interface (AR 5213). The nodes are connected to the internet through a Power Over Ethernet router:

  19. Solar/Electromagnetic Energy Harvesting and Wireless

    E-Print Network [OSTI]

    Tentzeris, Manos

    INVITED P A P E R Solar/Electromagnetic Energy Harvesting and Wireless Power Transmission This paper reviews numerous existing efforts and solutions in the field of solar and electromagnetic energy of solar/electromagnetic energy harvest- ing and wireless power transmission. More specifically, the paper

  20. Wireless Urban Sensing Systems

    E-Print Network [OSTI]

    2006-01-01

    Secure positioning of wireless devices with application toSecure positioning in wireless networks,’’ IEEE Journal onIssue on Security in Wireless Ad Hoc Networks, February

  1. MHP: Master-Handoff Protocol for Fast and Energy-Efficient Data Transfer over SPI in Wireless Sensing Systems

    E-Print Network [OSTI]

    Yoo, Seung-mok

    2012-01-01

    include wireless sensing systems, low-power design, energyFast and Energy-Efficient Data Transfer over SPI in WirelessEnergy efficiency, master-slave switch, SPI bus, wireless

  2. Frontispiece Advanced Lunar Base

    E-Print Network [OSTI]

    Rathbun, Julie A.

    chemical reactors to combine hydrogen brought from Earth with oxygen found in lunar soil to make their water. The pioneers sought temporary shelter under trees or in the lee of a cliff and built sod houses as their first homes on the new land; settlers of the Moon may seek out lava tubes for their shelter or cover

  3. Digital Wireless Communication

    E-Print Network [OSTI]

    Heath Jr., - Robert W.

    Digital Wireless Communication: Physical Layer Exploitation Wireless Networking and Communications 30, 12 #12;Wireless is Everywhere cellular networks local area networks personal area networks emerging applications Thursday, August 30, 12 #12;Where is Wireless Taught? 3 Undergraduate Graduate

  4. Cooperative Wireless Network Behnaam Aazhang

    E-Print Network [OSTI]

    Aazhang, Behnaam

    Cooperative Wireless Network Behnaam Aazhang #12;Cooperative Wireless Network Behnaam Aazhang Sabharwal #12;Wireless Network · Infrastructure · Ad hoc · Mesh network #12;Engineering Wireless Network · Wireless links ­ Per link design #12;Single Wireless Link · Additive Gaussian Channels ­ Achievable rate

  5. Low power architectures for wireless sensor networks ( as part of the SPHERE (a Sensor Platform for HEalthcare in a

    E-Print Network [OSTI]

    Bristol, University of

    the communication link to be power cycle. Parallel processing combined with adaptive voltage and frequency scaling

  6. Circuits and systems for efficient portable-to-portable wireless charging

    E-Print Network [OSTI]

    Jin, Rui, M. Eng. Massachusetts Institute of Technology

    2014-01-01

    In today's world of ever-increasing low-power portable electronics, from implants to wireless accessories, powering these devices efficiently and conveniently is an escalating issue. The proposed solution is to wirelessly ...

  7. Uses of lunar sulfur

    SciTech Connect (OSTI)

    Vaniman, D.T.; Pettit, D.R.; Heiken, G.

    1988-01-01

    Sulfur and sulfur compounds have a wide range of applications for their fluid, electrical, chemical and biochemical properties. Although low in abundance on the Moon (/approximately/0.1% in mare soils), sulfur is surface-correlated and relatively extractable. Co-production of sulfur during oxygen extraction from ilmenite-rich soils could yield sulfur in masses up to 10% of the mass of oxygen produced. Sulfur deserves serious consideration as a lunar resource. 29 refs., 3 figs.

  8. Brief Contributions________________________________________________________________________________ Topology Control of Ad Hoc Wireless

    E-Print Network [OSTI]

    Poon, Chung Keung

    ________________________________________________________________________________ Topology Control of Ad Hoc Wireless Networks for Energy Efficiency Maggie X. Cheng, Member, IEEE, Mihaela of each wireless node such that the resulting network is connected and the total energy consumption the theoretical analysis. Index Terms--Multihop, ad hoc, wireless networks, energy efficiency, transmission power

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

    E-Print Network [OSTI]

    Teo, Yong-Meng

    With the convergence of technologies such as MEMS sensor devices, wireless networking, and low-power em- beddedSensor 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

  10. Wireless communication devices and movement monitoring methods

    DOE Patents [OSTI]

    Skorpik, James R.

    2006-10-31

    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 Sensor Networks Lecture 1: Introduction

    E-Print Network [OSTI]

    Maróti, Miklós

    Harvard University 4 Wireless Technologies Comparison Data rate Complexity/power/cost CC1000 Bluetooth 802 University 5 Wireless Technologies Comparison Type Data rate Transmit pwr Range (approx) Cost 802.11b 11Ptr, Vanderbilt #12;2009 ­© Matt Welsh Harvard University 10 Solar panels for charging car battery (used by Free

  12. Monitoring Churn in Wireless g Stephan Holzer

    E-Print Network [OSTI]

    Monitoring Churn in Wireless g Networks Stephan Holzer Yvonne Anne Pignolet ETH Zurich Roger Wattenhofer #12;Motivation / Intro Network of sensor nodes: · wireless, communicating on several · battery powered All nodes should be aware of all present nodes · with small delay · with little energy

  13. Insecurity of Wireless Networks

    SciTech Connect (OSTI)

    Sheldon, Frederick T; Weber, John Mark; Yoo, Seong-Moo; Pan, W. David

    2012-01-01

    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.

  14. Fully Power-Aware and Location-Aware Protocols for Wireless Multi-hop Ad Hoc Networks

    E-Print Network [OSTI]

    Tseng, Yu-Chee

    issue for MANET since most mobile hosts will be oper- ated by battery powers. In this paper, we address for almost all kinds of portable devices supported battery energy is power saving. Without power, any mobile to extend the lifetime of batteries is an important issue, especially for MANET, which consists of mobile

  15. Maximizing Rewards in Wireless Networks with Energy and Timing

    E-Print Network [OSTI]

    Xu, Cheng-Zhong

    a transmitter delivers, the more rewards it obtains. Our objective is to develop schemes that selectively the transmission rate with proper wireless channel coding or modulation schemes [13], [29]. As applications sources, such as solar power, wind power, and mechanical power, from the environment [19]. Wireless nodes

  16. 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

    2013-01-01

    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.

  17. Impact of processing energy on the capacity of wireless channels

    E-Print Network [OSTI]

    Youssef-Massaad, Pamela, 1981-

    2005-01-01

    Power efficiency is a capital issue in the study of mobile wireless nodes owing to constraints on their battery size and weight. A careful examination of the power consumption in low-power nodes shows that, as the total ...

  18. MINIMIZE THE TOTAL POWER CONSUMPTION FOR MULTIUSER VIDEO TRANSMISSION OVER CDMA WIRELESS NETWORK: A TWO-STEP APPROACH

    E-Print Network [OSTI]

    Erkip, Elza

    power while the received quality at each terminal is guaranteed. The system param- eters to be adjusted, especially in systems that employ code division multiple access (CDMA) [1]. In [1], the quality of service consumption. The QoS measures are the received video quality at each terminal and the power consumed (either

  19. A Study of the Energy Saving and Capacity Improvement Potential of Power Control in Multi-hop Wireless Networks

    E-Print Network [OSTI]

    Hwu, Wen-mei W.

    A Study of the Energy Saving and Capacity Improvement Potential of Power Control in Multi with respect to energy consumption and network capacity. We show that power control large- ly improves the network capacity and energy savings in all investigated scenarios, and that utilizing a greater number

  20. A Wilkinson Power Divider on a Low Resistivity Si Substrate with a Polyimide Interface Layer for Wireless Circuits

    E-Print Network [OSTI]

    Tentzeris, Manos

    1 A Wilkinson Power Divider on a Low Resistivity Si Substrate with a Polyimide Interface Layer Abstract A 3-dB Wilkinson power divider on low resistivity silicon substrate (20 :-cm) with a polyimide and isolation is achieved by using a 20 Pm thick polyimide interface layer on top of the silicon wafer

  1. On-Demand Based Wireless Resources Trading for Green Communications

    E-Print Network [OSTI]

    Cheng, Wenchi; Zhang, Hailin; Wang, Qiang

    2011-01-01

    The purpose of Green Communications is to reduce the energy consumption of the communication system as much as possible without compromising the quality of service (QoS) for users. An effective approach for Green Wireless Communications is On-Demand strategy, which scales power consumption with the volume and location of user demand. Applying the On-Demand Communications model, we propose a novel scheme -- Wireless Resource Trading, which characterizes the trading relationship among different wireless resources for a given number of performance metrics. According to wireless resource trading relationship, different wireless resources can be consumed for the same set of performance metrics. Therefore, to minimize the energy consumption for given performance metrics, we can trade the other type of wireless resources for the energy resource under the demanded performance metrics. Based on the wireless resource trading relationship, we derive the optimal energy-bandwidth and energy-time wireless resource trading ...

  2. Efficient Broadband RF Energy Harvesting for Wireless Sensors Joseph A. Hagerty, Tian Zhao, Regan Zane and Zoya Popovic

    E-Print Network [OSTI]

    Efficient Broadband RF Energy Harvesting for Wireless Sensors Joseph A. Hagerty, Tian Zhao, Regan. · the last section discusses application examples of RF energy harvesting in wireless sensors. RF Power an approach to wireless power delivery and subsequent power management for low-power batteryless sensors

  3. Efficient wireless charging with gallium nitride FETs

    E-Print Network [OSTI]

    Yeh, Theresa (Theresa I.)

    2014-01-01

    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 ...

  4. Integrating spinal codes into wireless systems

    E-Print Network [OSTI]

    Iannucci, Peter Anthony

    2013-01-01

    Rateless spinal codes [47] promise performance gains for future wireless systems. These gains can be realized in the form of higher data rates, longer operational ranges, reduced power consumption, and greater reliability. ...

  5. Energy aware network coding in wireless networks

    E-Print Network [OSTI]

    Shi, Xiaomeng, Ph. D. Massachusetts Institute of Technology

    2012-01-01

    Energy is one of the most important considerations in designing reliable low-power wireless communication networks. We focus on the problem of energy aware network coding. In particular, we investigate practical energy ...

  6. PHENOMENOLOGY Wireless Channel Modeling

    E-Print Network [OSTI]

    Giridhar, K.

    PHENOMENOLOGY Wireless Channel Modeling Clarke's, Jakes' and modified Jakes' models Koyalkar Raman? What is channel modeling? Wireless channel modeling Modeling Fading ­ Rayleigh Clarke's, Jakes, they are short ranged, motion restricted. Channel Wired - Single Path - Motion Restricted Wireless - Multipath

  7. Wireless Network Esercitazioni

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Wireless Network Esercitazioni Alessandro Villani avillani@science.unitn.it #12;Wireless Router WRT54G LINKSYS #12;WRT54G Č un router Wireless: 1 porta Ethernet verso la LAN esterna 4 porte Ethernet

  8. Invited Paper Optical Wireless Applications -A Solution to Ease the Wireless

    E-Print Network [OSTI]

    Kavehrad, Mohsen

    themselves of these aforementioned services. Advances in displays, battery technology and processing power to explode in the next 5 years, largely due to the proliferation of mobile video and mobile web applicationsInvited Paper Optical Wireless Applications - A Solution to Ease the Wireless Airwaves Spectrum

  9. Wireless Network Esercitazioni

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Wireless Network Esercitazioni Alessandro Villani avillani@science.unitn.it #12;Ethereal #12 wireless LAN (WLAN) Non č ancora realmente utilizzato Scaricabile all'indirizzo: http

  10. Beamforming-Based Broadcast Scheme for Multihop Wireless Networks with Transmission

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Beamforming-Based Broadcast Scheme for Multihop Wireless Networks with Transmission Range transmission power for a beamforming-based broadcast scheme in multihop wireless networks? To address wireless network, and demonstrated in terms of implicated nodes'ratio, power transmission gain

  11. Energy-Efficient Wireless Communication based on Directional Transmission from Mobile Access

    E-Print Network [OSTI]

    Zhong, Lin

    1 Energy-Efficient Wireless Communication based on Directional Transmission from Mobile Access, the power amplifier (PA) is the most power-hungry component for wireless transmission. We aimSwitch dynamically select the best antenna during active wireless transceiving without disrupting the communication

  12. Energy-Aware Spectrum Sensing in Cognitive Wireless Sensor Networks: a Cross Layer Approach

    E-Print Network [OSTI]

    Shihada, Basem

    Energy-Aware Spectrum Sensing in Cognitive Wireless Sensor Networks: a Cross Layer Approach Luca-power wireless motes [6] and thus introduces significant energy overhead. In order to meet power constraints Stabellini and Jens Zander Wireless@KTH, The Royal Institute of Technology, Electrum 418, SE-164 40 Kista

  13. Embargoed: Not for release until 2:00 pm U.S. Eastern Time Thursday, 07 June 2007. MIT TEAM EXPERIMENTALLY DEMONSTRATES WIRELESS POWER TRANSFER, POTENTIALLY

    E-Print Network [OSTI]

    Soljačić, Marin

    and the appliance. The MIT team refers to their concept as "WiTricity" (as in Wireless Electricity). The work and the device, as well as a sophisticated tracking mechanism when the device is mobile. In contrast, WiTricity

  14. 2256 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 3, NO. 6, NOVEMBER 2004 Two-Cell Power Allocation for Downlink CDMA

    E-Print Network [OSTI]

    Honig, Michael L.

    . As in prior work on utility-based resource allocation, we assume that each user has a utility function Allocation for Downlink CDMA Chi Zhou, Peifang Zhang, Michael L. Honig, Fellow, IEEE, and Scott Jordan Abstract--Power and code allocation across two adjacent cells is studied for the downlink of a code

  15. Opportunistic control over shared wireless channels Konstantinos Gatsis, Student Member, IEEE, Miroslav Pajic, Member, IEEE, Alejandro Ribeiro, Member, IEEE,

    E-Print Network [OSTI]

    Pappas, George J.

    Opportunistic control over shared wireless channels Konstantinos Gatsis, Student Member, IEEE--We consider a wireless control architecture with multiple control loops over a shared wireless medium. A sched Terms--Scheduling, networked control systems, wireless fading channels, opportunistic adaptation, power

  16. Mobility in Wireless Sensor Networks

    E-Print Network [OSTI]

    Mehta, Ankur Mukesh

    2012-01-01

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

  17. Wireless passive radiation sensor

    DOE Patents [OSTI]

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

    2013-12-03

    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.

  18. Vibration energy harvesting is an attractive technique for the potential powering of wireless sensors and low power devices. While the technique can be employed to

    E-Print Network [OSTI]

    Fisher, Frank

    ABSTRACT Vibration energy harvesting is an attractive technique for the potential powering vibrations and vibrating structures, a general requirement independent of the mechanical to electrical energy transfer mechanism is that the vibration energy harvesting device operate in resonance at the excitation

  19. Lunar Sample Compendium C Meyer 2011

    E-Print Network [OSTI]

    Rathbun, Julie A.

    . of water for up to 10 hrs. after the CM was retrieved (Butler 1973, pages 38 and 39). The outer bag Sci. Conf. 1975-2003. Butler P. (1973) Lunar Sample Information Catalog Apollo 17. Lunar Receiving Laboratory. MSC 03211 Curator's Catalog. pp. 447. Heiken G.H. (1974) A catalog of lunar soils. JSC Curator

  20. Wireless System Tracks Esophageal

    E-Print Network [OSTI]

    Chiao, Jung-Chih

    Wireless System Tracks Esophageal Reflux WEDNESDAY, June 20 (HealthDay News) -- A wireless and transmits that information to a wireless sensor worn around the patient's neck. Details about this system HealthDay · Wireless System Tracks Esophageal Reflux · Experts Debate Limits on Implanted Defibrillator

  1. WIRELESS DATA COMMUNICATIONS

    E-Print Network [OSTI]

    Kranakis, Evangelos

    1 WIRELESS DATA COMMUNICATIONS Ce n'est pas possible!. . .This thing speaks! Dom Pedro II, 1876 topic of signaling that makes communication possible in all wireless systems. Nowadays, wireless Michel Barbeau and Evangelos Kranakis 2007 John Wiley & Sons, Ltd COPYRIGHTED MATERIAL #12;2 WIRELESS

  2. Wireless Network Esercitazioni

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Wireless Network Esercitazioni Alessandro Villani avillani@science.unitn.it #12;Configurazione AP sito CISCO: http://www.cisco.com/public/sw-center/sw- wireless.shtml La versione attuale č: c1200-k9w7;AP 1200: Configurazione Wireless Ruolo in una rete Wireless: Root o repeater Speed: Basic: traffico

  3. An Approach to Wireless Communications at Sandia National Laboratories

    SciTech Connect (OSTI)

    WITZKE, EDWARD L.

    2002-10-01

    Wireless communication plays an increasing role in military, industrial, public safety, and academic computer networks. Although in general, radio transmitters are not currently permitted in secured areas at Sandia, wireless communications would open new opportunities, allowing mobile and pervasive user access. Without wireless communications, we must live in a ''non-mainstream'' world of fixed, wired networks, where it becomes ever more difficult to attract and retain the best professionals. This report provides a review of the current state of wireless communications, which direction wireless technology is heading, and where wireless technology could be employed at Sandia. A list of recommendations on harnessing the power of wireless communications is provided to aid in building a state-of-the-art communication environment for the 21st century at Sandia.

  4. IEEE Wireless Communications December 200462 1536-1284/04/$20.00 2004 IEEE A wireless network

    E-Print Network [OSTI]

    Guibas, Leonidas J.

    parts of the processor, sensors, and wireless communication circuits are shut down to preserve power-wide emergency: A large-scale hazardous chemical gas leak occurred ten minutes ago near the town of XYZ

  5. Cost Effectiveness Analysis of Quasi-Static Wireless Power Transfer for Plug-In Hybrid Electric Transit Buses: Preprint

    SciTech Connect (OSTI)

    Wang, Lijuan; Gonder, Jeff; Burton, Evan; Brooker, Aaron; Meintz, Andrew; Konan, Arnaud

    2015-11-11

    This study evaluates the costs and benefits associated with the use of a plug-in hybrid electric bus and determines the cost effectiveness relative to a conventional bus and a hybrid electric bus. A sensitivity sweep analysis was performed over a number of a different battery sizes, charging powers, and charging stations. The net present value was calculated for each vehicle design and provided the basis for the design evaluation. In all cases, given present day economic assumptions, the conventional bus achieved the lowest net present value while the optimal plug-in hybrid electric bus scenario reached lower lifetime costs than the hybrid electric bus. The study also performed parameter sensitivity analysis under low market potential assumptions and high market potential assumptions. The net present value of plug-in hybrid electric bus is close to that of conventional bus.

  6. On computer vision in wireless sensor networks.

    SciTech Connect (OSTI)

    Berry, Nina M.; Ko, Teresa H.

    2004-09-01

    Wireless sensor networks allow detailed sensing of otherwise unknown and inaccessible environments. While it would be beneficial to include cameras in a wireless sensor network because images are so rich in information, the power cost of transmitting an image across the wireless network can dramatically shorten the lifespan of the sensor nodes. This paper describe a new paradigm for the incorporation of imaging into wireless networks. Rather than focusing on transmitting images across the network, we show how an image can be processed locally for key features using simple detectors. Contrasted with traditional event detection systems that trigger an image capture, this enables a new class of sensors which uses a low power imaging sensor to detect a variety of visual cues. Sharing these features among relevant nodes cues specific actions to better provide information about the environment. We report on various existing techniques developed for traditional computer vision research which can aid in this work.

  7. Wireless Network Economics and Games

    E-Print Network [OSTI]

    Huang, Jianwei

    Wireless Network Economics and Games Jianwei Huang Network Communications & Economics Lab-play-games/id642100914! ! · J. Huang and L. Gao, "Wireless Network Pricing," Synthesis Lectures on Communication Networks://jianwei.ie.cuhk.edu.hk/publication/Book/ WirelessNetworkPricing.pdf! ! #12;Why Wireless Economics and Games? #12;Wireless Utopia · Wireless spectrum

  8. Wireless Sensor Networks (WSN) consist of small, low-cost, resource-constrained embedded computers equipped with low-power radios and various sensors. When deployed, they form

    E-Print Network [OSTI]

    Maróti, Miklós

    Wireless Sensor Networks (WSN) consist of small, low-cost, resource-constrained embedded computers, healthcare, structural monitoring and the military among others. Many WSN applications rely on the location as they require no specialized hardware; they use the radio chip readily available on WSN nodes. RSS-based ranging

  9. A Mesh-based Robust Topology Discovery Algorithm for Hybrid Wireless Networks

    E-Print Network [OSTI]

    Birman, Kenneth P.

    A Mesh-based Robust Topology Discovery Algorithm for Hybrid Wireless Networks Ranveer CHANDRA˘ @research.att.com Abstract Wireless networks in home, office and sensor applications consist of nodes by a wireline network. Topology information of the wireless network at these powerful nodes can be used

  10. Energy-aware Broadcasting in Wireless Networks Ioannis Papadimitriou, Leonidas Georgiadis

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Energy-aware Broadcasting in Wireless Networks Ioannis Papadimitriou, Leonidas Georgiadis Abstract--In this paper we address the problem of broadcasting in wireless networks, so that the power consumed by any Terms-- Wireless Networks, Energy Conservation, Di- rected Spanning Tree, Lexicographic Optimization. I

  11. Giveaway Wireless Sensors for Large-Group Interaction Mark Feldmeier, Joseph A. Paradiso

    E-Print Network [OSTI]

    , featherweight wireless sensor, low-power wireless sensor. ACM Classification Keywords H.5.3 Group heartbeats [3]. Wireless multiplayer gaming is also growing very popular on cellphones [4] and PDA's [5 can be slow and nondeterministic, PDA's and cellphones are complex, slow and expensive. Figure 1

  12. Structuring Measurements for Modeling and the Deployment of Industrial Wireless Networks

    E-Print Network [OSTI]

    Zilic, Zeljko

    . Replacing wired units with wireless sensor network (WSN) nodes offers more flexibility, and ultimately coverage during its deployment. Wireless networking devices are inherently power-limited, which limits1 Structuring Measurements for Modeling and the Deployment of Industrial Wireless Networks Rong

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

    E-Print Network [OSTI]

    Beigl, Michael

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

  14. Wireless Sensor Networks : the hardware challenge and the cross-layering opportunity

    E-Print Network [OSTI]

    Ingrand, François

    #12;Target applications for wireless sensor networks Flight test instrumentation Pilot ­ crew;Target applications for wireless sensor networks Wireless flight test instrumentation Long term Low or medium data rate, low power nodes High number of nodes, different kind of sensors

  15. Throughput and Ergodic Capacity of Wireless Energy Harvesting Based DF Relaying Network

    E-Print Network [OSTI]

    Zhou, Xiangyun "Sean"

    Throughput and Ergodic Capacity of Wireless Energy Harvesting Based DF Relaying Network Ali A-and-forward (DF) relaying network based on wireless energy harvesting. The energy constrained relay node first (TSR) and ii) power splitting-based relaying (PSR). Con- sidering wireless energy harvesting constraint

  16. Low-Cost Truthful Multicast in Selfish and Rational Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Li, Xiang-Yang

    en- joy a more flexible composition. A wireless ad hoc network is a collection of radio devices limited transmission power. One of the dis- tinctive features of wireless networks is that the signal sent1 Low-Cost Truthful Multicast in Selfish and Rational Wireless Ad Hoc Networks Weizhao Wang Xiang

  17. Hazmat Cam Wireless Video System

    SciTech Connect (OSTI)

    Kevin L. Young

    2006-02-01

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

  18. Free space laser communication experiments from Earth to the Lunar Reconnaissance Orbiter in lunar orbit

    E-Print Network [OSTI]

    Sun, Xiaoli

    Laser communication and ranging experiments were successfully conducted from the satellite laser ranging (SLR) station at NASA Goddard Space Flight Center (GSFC) to the Lunar Reconnaissance Orbiter (LRO) in lunar orbit. ...

  19. Towards Energy-Awareness in Managing Wireless LAN Applications

    E-Print Network [OSTI]

    Bhatti, Saleem N.

    Several power saving mechanisms which aim to enhance energy efficiency have been proposed and are partially imple- mented: e.g. 802.11 Power Save Mode (PSM) [2], Unsched- uled Automatic Power Save Delivery (U-APSD) [3], WMM Power Save (WMM-PS) [4], Dynamic MIMO Power Save [5], and Wake-on-Wireless [6

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

    E-Print Network [OSTI]

    Deng, Jing

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

  1. 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

  2. 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

  3. Software-related Energy Footprint of a Wireless Broadband Module

    E-Print Network [OSTI]

    Software-related Energy Footprint of a Wireless Broadband Module Mikael Asplund mikael Keywords 3G, Energy footprint, Power consumption, Wireless broad- band 1. INTRODUCTION The battery lifetime Linköping, Sweden ABSTRACT Energy economy in mobile devices is becoming an increas- ingly important factor

  4. Pairing Based Mutual Healing in Wireless Sensor Sarita Agrawal1

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    (WSN) is a network of autonomous sensor nodes com- municating through wireless medium. The nodes in WSN. The main constraint in WSN is that sensor nodes have limited memory, power, computation and communication/alter the information contained and even physical destruction. Furthermore, the nodes in WSN com- municate via wireless

  5. Maximizing Battery Life Routing in Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Liang, Weifa

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

  6. Wireless Scheduling Mung Chiang

    E-Print Network [OSTI]

    Chiang, Mung

    Wireless Scheduling Mung Chiang Electrical Engineering, Princeton University WiOpt Seoul, Korea June 23, 2009 #12;Outline · Structured teaser on wireless scheduling · Focus on key ideas and 10 open

  7. Wireless Network Esercitazioni

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Wireless Network Esercitazioni Alessandro Villani avillani@science.unitn.it #12;WEP Cracking #12 (Nomina sunt consequentia rerum) quello di fornire sul canale wireless un livello di sicurezza equivalente

  8. Dynamic Wireless Power Transfer Feasibility

    Broader source: Energy.gov [DOE]

    2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

  9. Lunar geophysics: The Moon's fundamental shape and paleomagnetism studies

    E-Print Network [OSTI]

    Perera, Viranga

    2014-01-01

    Tectonics.   Reviews  of  Geophysics  and  Space   Physics  SANTA CRUZ Lunar geophysics: The Moon’s fundamental shapeViranga Perera Lunar geophysics: The Moon’s fundamental

  10. Wireless Network Esercitazioni

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Wireless Network Esercitazioni Alessandro Villani avillani@science.unitn.it #12;Reti Ad Hoc #12;Reti Ad Hoc (IBSS) Tipicamente le wireless LANs che conosciamo utilizzano la modalitŕ "infrastrutturata Hoc (IBSS) La modalitŕ Ad Hoc permette agli utenti di costituire una wireless LAN autonomamente

  11. Wireless World Research Forum

    E-Print Network [OSTI]

    Sasse, Angela

    Wireless World Research Forum Working Group 1 IEEE Communications Magazine Article Draft Considering the User in the Wireless World Authors: Ken Crisler (Motorola, US) Andrew Aftelak (Motorola, UK Dainesi (University of Pavia, Italy) Thea Turner (Motorola, US) #12;Abstract The Wireless World Research

  12. Wireless sensor networks: a survey I.F. Akyildiz, W. Su*, Y. Sankarasubramaniam, E. Cayirci

    E-Print Network [OSTI]

    Chen, Yuanzhu Peter

    of micro- electro-mechanical systems technology, wireless communications and digital electronics. First; Power aware protocols 1. Introduction Recent advances in micro-electro-mechanical systems (MEMS

  13. Wireless Antennas -Making Wireless Communications Perform Like Wireline Communications

    E-Print Network [OSTI]

    Hua, Yingbo

    1 Wireless Antennas - Making Wireless Communications Perform Like Wireline Communications Yingbo first provide an overview of some of the latest developments in wireless communications using multiple of wireless antennas or wireless relays that are distributed between a source and a destination. We propose

  14. Wireless Networks III, Fall 05 Lecture 2. Wireless TCP

    E-Print Network [OSTI]

    Schwefel, Hans-Peter

    Wireless Networks III, Fall 05 Lecture 2. Wireless TCP Exercises 1. TCP Performance: GPRS Scenario or re-orderings occur.] c) Now consider cases of exactly one segment loss on the wireless link. Consider:] The network is now wireless and the wireless link causes an additional packet loss of p'=2%. Furthermore

  15. Context-aware computing for wireless networks

    E-Print Network [OSTI]

    Ergüt, Salih

    2010-01-01

    a fourty dollar wireless router offers similar services tomechanism for wireless mesh networks where routers benefit

  16. 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

  17. Editorial Manager(tm) for Wireless Networks Manuscript Draft

    E-Print Network [OSTI]

    Kalyanaraman, Shivkumar

    power consumption. We also show that not only transmission power is greatly reduced, but also the aggregate power consumption for a successful transmission and reception. Moreover, a lower transmission power implies lower interference thus potentially increase the network capacity. Index Terms-- Wireless

  18. Resource-Efficient Wireless Monitoring based on Mobile Agent Migration

    E-Print Network [OSTI]

    Stanford University

    problems apply to other engineering structures, such as dams, buildings or wind turbines, which ABSTRACT Wireless sensor networks are increasingly adopted in many engineering applications sensor networks serve as a powerful alternative to traditional tethered monitoring systems. However, due

  19. Radio Resource Management for Green Wireless Networks Cristina Comaniciu

    E-Print Network [OSTI]

    Mandayam, Narayan

    energy sources (e.g. solar cells and wind turbines). Although research on the design of green radio battery power for mobile terminals and wireless sensors. Because of the focus on mobile terminals

  20. The LUCIS Constellation An Evolvable Lunar

    E-Print Network [OSTI]

    Born, George

    relay satellite system to enable communication and navigation for NASA orbiting, landing, and roving environmental parameters and lunar resources ­ Test technical capabilities as needed · Human return to the moon & Navigation architecture recommendations ­ Lunar relay architecture begins with a constellation to support

  1. LUNAR MINERALS James Papike, Lawrence Taylor, and Steven Simon

    E-Print Network [OSTI]

    Rathbun, Julie A.

    LUNAR MINERALS James Papike, Lawrence Taylor, and Steven Simon The lunar rocks described--make it easy to distinguish them from terrestrial rocks. However, the minerals that make up lunar rocks are (with a few notable exceptions) minerals that are also found on Earth. Both lunar and terrestrial rocks

  2. Survivability Considerations in Wireless Networks

    E-Print Network [OSTI]

    Ning, Jianxia

    2012-01-01

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

  3. Cooperation Incentives for Wireless Networks

    E-Print Network [OSTI]

    Wu, Chuchu

    2015-01-01

    incentives in multi-hop wireless networks. ” In INFOCOM,for offloading traffic from LTE network to wireless peer-to-reputation sys- tem for wireless mesh networks using network

  4. OIT Wireless Telemetry for Industrial Applications

    SciTech Connect (OSTI)

    Manges, WW

    2002-09-03

    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.

  5. World Conference on Structural Control and Monitoring 4WCSCM-242 A MULTIRATE RECURSIVE ARX ALGORITHM FOR ENERGY EFFICIENT WIRELESS

    E-Print Network [OSTI]

    Lynch, Jerome P.

    ALGORITHM FOR ENERGY EFFICIENT WIRELESS STRUCTURAL MONITORING R.A. Swartz and J.P. Lynch University the use of battery-powered wireless sensors are often focused on offering energy efficient unattended for processing when the network is large. Also, because wireless data transmission is an energy intensive process

  6. IEEE Wireless Communications December 2005 691536-1284/05/$20.00 2005 IEEE Since routing is an

    E-Print Network [OSTI]

    Chen, Yuanzhu Peter

    IEEE Wireless Communications · December 2005 691536-1284/05/$20.00 © 2005 IEEE Since routing is an essential function in these networks, developing power- aware routing protocols for ad hoc wireless networks have been proposed from a variety of perspectives. ACCEPTED FROM OPEN CALL INTRODUCTION Ad hoc wireless

  7. Wireless Networking | ornl.gov

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

    Wireless Networking A PDF version of these instructions is also available. As a visitor to Oak Ridge National Laboratory (ORNL), access to the ORNL wireless network is available...

  8. Journal of Power Sources 196 (2011) 95689573 Contents lists available at ScienceDirect

    E-Print Network [OSTI]

    2011-01-01

    electricity delivery and voltage elevation to a value that can drive a wireless temperature sensor, a power of Power Sources journal homepage: www.elsevier.com/locate/jpowsour Powering a wireless temperature sensor Power management system Ultracapacitor a b s t r a c t The application of wireless sensors

  9. American Institute of Aeronautics and Astronautics The Lunar Dust Problem: From Liability to Asset

    E-Print Network [OSTI]

    Taylor, Lawrence A.

    and researched processes on the Moon1-5 . The beaming of electrical power from lunar solar cells to LEO and Earth surfaces, such as solar cells; and 4) physiological effects on the tissue in human lungs. The chemical-30 nm) Fe0 particles, iron in its elemental form, concentrated especially in the fine, dusty fraction

  10. Estimating the frequency of extremely energetic solar events, based on solar, stellar, lunar, and terrestrial records

    E-Print Network [OSTI]

    Schrijver, Karel

    or less. [3] Solar events have an increasing potential to impact man- kind's technological infrastructureEstimating the frequency of extremely energetic solar events, based on solar, stellar, lunar powerful explosions on the Sun ­ in the form of bright flares, intense storms of solar energetic particles

  11. 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 ...

  12. Flexible network wireless transceiver and flexible network telemetry transceiver

    DOE Patents [OSTI]

    Brown, Kenneth D. (Grain Valley, MO)

    2008-08-05

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

  13. Projects To Develop Novel Monitoring Networks for Advanced Power...

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

    novel approaches in model development and validation; monitoring refractory health; and wireless, self-powered sensors for advanced, next-generation power systems. They will...

  14. The simplest method to measure the geocentric lunar distance: a case of citizen science

    E-Print Network [OSTI]

    Zuluaga, Jorge I; Ferrin, Ignacio

    2014-01-01

    We present the results of measuring the geocentric lunar distance using what we propose is the simplest method to achieve a precise result. Although lunar distance has been systematically measured to a precision of few millimeters using powerful lasers and retroreflectors installed on the moon by the Apollo missions, the method devised and applied here can be readily used by nonscientist citizens (e.g. amateur astronomers or students) and it requires only a good digital camera. After launching a citizen science project called the Aristarchus Campaign, intended to involve astronomy enthusiasts in scientific measurement of the Lunar Eclipse of 15 April 2014, we compiled and measured a series of pictures obtained by one of us (J.C. Figueroa). These measurements allowed us to estimate the lunar distance to a precision of 3%. We describe here how to perform the measurements and the method to calculate from them the geocentric lunar distance using only the pictures time stamps and a precise measurement of the insta...

  15. Micropower Integrated Bioamplifier and Auto-ranging ADC for Wireless and Implantable

    E-Print Network [OSTI]

    Cauwenberghs, Gert

    -resolution biopotential data ac- quisition circuit for wireless and implantable medical instrumen- tation is presented in a biopotential acquisition system. For miniature wireless battery powered devices, minimizing the power integrated solutions for multi-channel biopotential recordings using the approach of a low noise preamplifier

  16. Secure and Wireless Improving TCP performance over wireless links

    E-Print Network [OSTI]

    Kurose, Jim

    Secure and Wireless Networks Improving TCP performance over wireless links Secure leader election in wireless networks Additional Projects In ter-Ara Rekey ing Al gorithms for mobile networks http analysisofhierarchical, s ubset differencerekeying (joint with Nortel) - hidden Markov model characterization of wireless

  17. Wireless Insufflation for Wireless Capsule Endoscopy Byron Smith

    E-Print Network [OSTI]

    Wireless Insufflation for Wireless Capsule Endoscopy By Byron Smith Thesis Submitted to the Faculty to distend tissue. In an effort to bring this functionality to wireless capsule endoscopy, the present, fabricated and tested to demonstrate the feasibility of wireless capsule insufflation. iv #12;Contents

  18. Wireless Data Communication, Fall 03 Lecture 4. Wireless TCP

    E-Print Network [OSTI]

    Schwefel, Hans-Peter

    Wireless Data Communication, Fall 03 Lecture 4. Wireless TCP Exercises 1. TCP Performance: GPRS cases of exactly one segment loss on the wireless link. Consider therefore the following two cases i] implementation of an appropriate algorithm, e.g. bi-section). c) [Optional, if time:] The network is now wireless

  19. Outage Optimum Routing for Wireless Networks

    E-Print Network [OSTI]

    Garcia-Luna-Aceves, J.J.

    2011-01-01

    Outage Optimum Routing for Wireless Networks B. Amiri, H. R.of wireless network outage probability in a fadinguse analytical calculation of outage probability in wireless

  20. Wireless Demand Response Controls for HVAC Systems

    E-Print Network [OSTI]

    Federspiel, Clifford

    2010-01-01

    conditioning. Figure 2: Wireless discharge air temperatureWireless Demand Response Controls for HVAC Systems Cliffordcontrol software and wireless hardware that could enable

  1. Wireless Magnetic Sensor Applications in Transportation Infrastructure

    E-Print Network [OSTI]

    Sanchez, Rene Omar

    2012-01-01

    2.2 Wireless Magnetic Sensors Vehicle Detection2.3 Vehicle Re-Identification Using Wireless MagneticPerformance iv 6 Wireless Magnetic Sensor Applications for

  2. Fault Tolerant Mobility Planning for Rapidly Deployable Wireless Networks ?

    E-Print Network [OSTI]

    Texas at Dallas, University of

    powerful mobile hosts. The mobile base stations have to maintain wireless connectivity while on the move, more computational power, etc.). These special nodes, henceforth referred to as mobile base stations. In cellular networks powerful stationary base stations are tied to a wired backbone network and com­ municate

  3. Wireless Communications Device Policy & Procedures

    E-Print Network [OSTI]

    Wireless Communications Device Policy & Procedures Effective Date: October 1, 2012 Page 1 Revised staff eligibility for a wireless communication device b. Define the process for obtaining a wireless Wireless devices and plans will be provided by StFX for the following employees: 1. President, Vice

  4. eduroam Wireless Guide Windows Vista

    E-Print Network [OSTI]

    Balasuriya, Sanjeeva

    eduroam Wireless Guide Windows Vista Updated: 18 February 2011 1. Click the wireless icon in the taskbar 2. Select "connect to a network" 3. Select the "eduroam" wireless network from the list and press connecting: To view common issues visit http://www.adelaide.edu.au/its/wireless/help/ or use the below

  5. Technology Development: Wireless Sensors and Controls BT0201 Review of Energy Scavenging Schemes and Recommended Order of Investigation

    SciTech Connect (OSTI)

    DeSteese, John G.; Olsen, Larry C.; Schienbein, Lawrence A.

    2004-09-01

    This report reviews the characteristics of four candidate concepts that extract and convert ambient energy to provide electrical power for wireless sensors.

  6. Lunar descent using sequential engine shutdown

    E-Print Network [OSTI]

    Springmann, Philip N

    2006-01-01

    The notion of sequential engine shutdown is introduced and its application to lunar descent is motivated. The concept calls for the utilization of multiple fixed thrust engines in place of a single continuously throttleable ...

  7. Lunar magnetic field measurements with a cubesat

    E-Print Network [OSTI]

    Garrick-Bethell, Ian

    We have developed a mission concept that uses 3-unit cubesats to perform new measurements of lunar magnetic fields, less than 100 meters above the Moon’s surface. The mission calls for sending the cubesats on impact ...

  8. Lunar Seismic Profiling Experiment Dynamic Analysis

    E-Print Network [OSTI]

    Rathbun, Julie A.

    II I! Lunar Seismic Profiling Experiment Dynamic Analysis CONTENTS Section 1. 0 Assumptions Section. The solid curve is a plot of the specification data for the Design and Qualification of the explosive

  9. Vibration Power Harvesting | Department of Energy

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

    wireless sensor networks are deployed, including refrigeration and HVAC systems, pulp processing and paper printing, condition-based maintenance, and power generation...

  10. Hydrogen Fuel Cells Providing Critical Backup Power

    Broader source: Energy.gov [DOE]

    ReliOn, Inc., specializes in hydrogen fuel-cell backups for businesses have to stay functional during power outages -- companies like your wireless provider.

  11. 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

  12. Tripling the capacity of wireless communications using

    E-Print Network [OSTI]

    channels of electric-®eld polarization for wireless communication. In order to make our statements more................................................................. Tripling the capacity of wireless .............................................................................................................................................. Wireless communications are a fundamental part of modern information infrastructure. But wireless bandwidth

  13. Wireless Sensor Networks: Monitoring and Control

    SciTech Connect (OSTI)

    Hastbacka, Mildred; Ponoum, Ratcharit; Bouza, Antonio

    2013-05-31

    The article discusses wireless sensor technologies for building energy monitoring and control. This article, also, addresses wireless sensor networks as well as benefits and challenges of using wireless sensors. The energy savings and market potential of wireless sensors are reviewed.

  14. Wireless Magnetic Sensor Applications in Transportation Infrastructure

    E-Print Network [OSTI]

    Sanchez, Rene Omar

    2012-01-01

    of wireless magnetic sensors in Intelligent Trans- portationof wireless magnetic sensors in Intelligent Transportationmagnetic sensors for different Intelligent Transportation

  15. Abstract--This paper presents a method for wireless powering of multiple electronic devices placed in an over-moded 2.2-GHz

    E-Print Network [OSTI]

    Popovic, Zoya

    placed in an over-moded 2.2-GHz shielded microwave cavity using watt-level high-efficiency sources. Two-7], and far-field scavenging of low power densities [8-12]. The applications have ranged from powering solar

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

    E-Print Network [OSTI]

    Fang, Xi; Xue, Guoliang

    2011-01-01

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

  17. Initial observations from the Lunar Orbiter Laser Altimeter (LOLA)

    E-Print Network [OSTI]

    Smith, David Edmund

    As of June 19, 2010, the Lunar Orbiter Laser Altimeter, an instrument on the Lunar Reconnaissance Orbiter, has collected over 2.0 × 109 measurements of elevation that collectively represent the highest resolution global ...

  18. APOLLO LUNAR SCIENCE PROGRAM REPORT OF PLANNING TEAMS

    E-Print Network [OSTI]

    Rathbun, Julie A.

    AND PETROGRAPHY: SAMPLING AND EXAMINATION OF LUNAR SURFACE MATERIALS IV GEOCHEMISTRY V PASSIVE LUNAR SEISMIC~oved early Apollo Landings on the Moon, on geological field investigations, mineralogy and petrography

  19. Hans Peter Schwefel Wireless Networks III, Fall 2005: MM2, Wireless TCP

    E-Print Network [OSTI]

    Schwefel, Hans-Peter

    Page 1 Hans Peter Schwefel Wireless Networks III, Fall 2005: MM2, Wireless TCP Wireless Networks Wireless TCP (HPS) · Mm3 Wireless applications, SIP & IMS (HPS) · Mm4 Ad-hoc Networks I (TKM) · Mm5 Ad Schwefel Wireless Networks III, Fall 2005: MM2, Wireless TCP Background: IP Protocol Stack Network Layer

  20. ULTRA SECURE HIGH RELIABILITY WIRELESS RADIATION MONITOR

    SciTech Connect (OSTI)

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

    2011-08-03

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

  1. Adaptive Scheduling in Ad Hoc and Cellular Wireless Networks

    E-Print Network [OSTI]

    Tan, Choo Chin

    2013-01-01

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

  2. An Evolvable Lunar Communication and Navigation Constellation Concept

    E-Print Network [OSTI]

    Born, George

    communication links with the Earth. A lunar relay element will be necessary to provide critical communication and navigation support for the upcoming missions. This paper presents a highly evolvable, low-cost lunar relay; · Use lunar exploration activities to further science, and to develop and test new approaches

  3. MICROWAVE PROCESSING OF LUNAR SOIL Lawrence A. Taylor1

    E-Print Network [OSTI]

    Taylor, Lawrence A.

    MICROWAVE PROCESSING OF LUNAR SOIL Lawrence A. Taylor1 and Thomas T. Meek2 The unique properties of lunar regolith make for the extreme coupling of the soil to microwave radiation. Space weathering lunar soil (i.e., 1200-1500 o C) in minutes in a normal kitchen-type 2.45 GHz microwave, almost as fast

  4. LUNAR SEISMIC PROFILING EXPERIMENT HOUSING AND CHARGE ASSEMBLY

    E-Print Network [OSTI]

    Rathbun, Julie A.

    ATM-1094f LUNAR SEISMIC PROFILING EXPERIMENT HOUSING AND CHARGE ASSEMBLY FOAM TEST REPORT PAGE DATE. R. Lewis, Manager Lunar Seismic Profiling Experiment #12;ATM-1094 I LUNAR SEISMIC PROFILING'MNAR SEISMIC PROFILING EXPERIMENT HOUSING AND CHARGE ASSEMBLY FOAM TEST REPORT .C"l. j_ ..LV~ .L v 7"'% I PAGE

  5. Integrated Modeling and Simulation of Lunar Exploration Campaign Logistics

    E-Print Network [OSTI]

    de Weck, Olivier L.

    Integrated Modeling and Simulation of Lunar Exploration Campaign Logistics by Sarah A. Shull B #12;Integrated Modeling and Simulation of Lunar Exploration Campaign Logistics by Sarah A. Shull to establish a manned outpost on the lunar surface, it is essential to consider the logistics of both

  6. Characterization of plasma sprayed and explosively consolidated simulated lunar soil

    SciTech Connect (OSTI)

    Powell, S.J.; Inal, O.T.; Smith, M.F.

    1997-06-01

    Two methods for the use of lunar materials for the construction of shelters on the Moon are being proposed: explosive consolidation of the soil into structural components and plasma spraying of the soil to join components. The plasma-sprayed coating would also provide protection from the intense radiation. In this work, a mare simulant was plasma-sprayed onto a stainless steel substrate. Deposition of a 0.020 inch coating using power inputs of 23, 25, 27 and 29 kW were compared. Hardness of the coatings increased with each increase of power to the system, while porosity at the interface decreased. All coatings exhibited good adhesion. Simultaneously, an explosively consolidated sample was similarly characterized to afford a comparison of structural features associated with each mode of proposed use.

  7. Network coded wireless architecture

    E-Print Network [OSTI]

    Katti, Sachin Rajsekhar

    2008-01-01

    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 ...

  8. wireless.ps

    E-Print Network [OSTI]

    D-LINK DWL-1000AP 802.11B Wireless LAN Access Point 11Mbps Best Deal On Earth! Regular price: $399.00. Sale price: $234.00. DWL-120> D-LINK ...

  9. Implementing a Low Power TDMA Protocol Over 802.11

    E-Print Network [OSTI]

    and contrast our protocol to other wireless power- saving mechanisms, then discuss the design, or wind energy to power themselves and their wireless network interface. The availability of low- powerImplementing a Low Power TDMA Protocol Over 802.11 Jim Snow, Wu-chi Feng, Wu-chang Feng (jsnow

  10. Simulation and Evaluation of Unsynchronized Power Saving Mechanisms

    E-Print Network [OSTI]

    Braun, Torsten

    Simulation and Evaluation of Unsynchronized Power Saving Mechanisms in Wireless Ad hoc Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Power Saving in Multi-Hop Wireless Ad hoc Networks 4 2.1 Basic Power Saving Mechanism) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.4 Medium Access Control (MAC) Layer Modifications . . . . . . . . 6 3 Evaluation of Power Saving

  11. Flexible Resource Allocation for Multicast in OFDMA based Wireless Networks

    E-Print Network [OSTI]

    New South Wales, University of

    Flexible Resource Allocation for Multicast in OFDMA based Wireless Networks Sanjay Jha and Xin Zhao) to minimise the total transmission power with the constraints on user's data rate or bit error rate [12], and 2) to maximise system throughput with the constraints on total transmission power or user

  12. Electromagnetic Interference and Safety in Wireless Networks: A Statistical Approach

    E-Print Network [OSTI]

    Loyka, Sergey

    the radiation of a large number of relatively low- power devices (e.g. cell phones), since their individual]. There has been recently growing evidence that low-level radiation of cell phones is able to stimulate is able to account for aggregate radiation levels of many low- power sources (e.g. cell phones, wireless

  13. On the possibility of lunar core phase detection using new seismometers for soft-landers in future lunar missions

    E-Print Network [OSTI]

    Takeuchi, Nozomu

    Planetary exploration Lunar exploration Moonquake Lunar seismicity Lunar core a b s t r a c t Information Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai and evolution of the Moon. Recent studies have indicated that possible seismic energies of core-reflected phases

  14. Study on Alternative Cargo Launch Options from the Lunar Surface

    SciTech Connect (OSTI)

    Cheryl A. Blomberg; Zamir A. Zulkefli; Spencer W. Rich; Steven D. Howe

    2013-07-01

    In the future, there will be a need for constant cargo launches from Earth to Mars in order to build, and then sustain, a Martian base. Currently, chemical rockets are used for space launches. These are expensive and heavy due to the amount of necessary propellant. Nuclear thermal rockets (NTRs) are the next step in rocket design. Another alternative is to create a launcher on the lunar surface that uses magnetic levitation to launch cargo to Mars in order to minimize the amount of necessary propellant per mission. This paper investigates using nuclear power for six different cargo launching alternatives, as well as the orbital mechanics involved in launching cargo to a Martian base from the moon. Each alternative is compared to the other alternative launchers, as well as compared to using an NTR instead. This comparison is done on the basis of mass that must be shipped from Earth, the amount of necessary propellant, and the number of equivalent NTR launches. Of the options, a lunar coil launcher had a ship mass that is 12.7% less than the next best option and 17 NTR equivalent launches, making it the best of the presented six options.

  15. Prolonging Sensor Network Lifetime Through Wireless Charging Yang Peng, Zi Li, Wensheng Zhang, and Daji Qiao

    E-Print Network [OSTI]

    Qiao, Daji

    technologies, the wire- less charging technology, together with more and more ma- ture and inexpensive mobile technology allows a mobile charger to transfer energy to sensor nodes wirelessly without requiring accurate The emerging wireless charging technology is a promis- ing alternative to address the power constraint problem

  16. Energy Modeling of Processors in Wireless Sensor Networks based on Petri Nets

    E-Print Network [OSTI]

    Zhu, Yifeng

    Energy Modeling of Processors in Wireless Sensor Networks based on Petri Nets Ali Shareef, Yifeng, zhu }@eece.maine.edu Abstract Power minimization is a serious issue in wireless sensor networks are needed. This paper demonstrates that Petri nets are a viable option of modeling a processor. In fact

  17. Outage Minimization for a Fading Wireless Link with Energy Harvesting Transmitter and Receiver

    E-Print Network [OSTI]

    1 Outage Minimization for a Fading Wireless Link with Energy Harvesting Transmitter and Receiver Abstract--This paper studies online power control policies for outage minimization in a fading wireless link with energy harvesting transmitter and receiver. The outage occurs when either the transmitter

  18. Optimal Wake-up Scheduling for PSM Delay Minimization in Mobile Wireless Networks

    E-Print Network [OSTI]

    Jagannatham, Aditya K.

    1 Optimal Wake-up Scheduling for PSM Delay Minimization in Mobile Wireless Networks AbhishekS) in wireless packet networks. In this context, the Power Saving Mode (PSM) adopted by the IEEE 802.11 and IEEE utilization. In PSM, an idle mobile station (MS) can enter the sleep mode by switching off the device modem

  19. Sensorcam: An Energy-Efficient Smart Wireless Camera for Environmental Monitoring

    E-Print Network [OSTI]

    Vetterli, Martin

    and the "intelligence" of the camera it- self, we demonstrate an energy-efficient wireless monitoring system in a realSensorcam: An Energy-Efficient Smart Wireless Camera for Environmental Monitoring Zichong Chen camera running a Linux-base open system. Through better power manage- ment in idle period

  20. Adaptive Resource Allocation in SDMA-based Wireless Broadband Networks with OFDM Signaling

    E-Print Network [OSTI]

    Koutsopoulos, Iordanis

    of wireless broadband access in local and wide area networks is the main expression of the need for flexible to adjust pa- rameters such as transmission power, modulation level, symbol rate or forward error correctionAdaptive Resource Allocation in SDMA-based Wireless Broadband Networks with OFDM Signaling Iordanis

  1. Energy Efficient Communication in Next Generation Rural-Area Wireless Networks

    E-Print Network [OSTI]

    Belding-Royer, Elizabeth M.

    of flexible wireless transmission over long- distance white space links. We theoretically and experimentally and develop Power- Rate, a protocol that dynamically adjusts transmission parameters according to channelEnergy Efficient Communication in Next Generation Rural-Area Wireless Networks Veljko Pejovic

  2. Sensor Wars: Detecting and Defending Against Spam Attacks in Wireless Sensor Networks

    E-Print Network [OSTI]

    Levi, Albert

    network are discussed in [7]. Security, network bandwidth and power consumption in sensor networksSensor Wars: Detecting and Defending Against Spam Attacks in Wireless Sensor Networks Serdar Sancak@sabanciuniv.edu Abstract--Anti-nodes deployed inside a wireless sensor network can frequently generate dummy data packets

  3. Constant Time Queries for Energy Efficient Paths in Multi-Hop Wireless Networks

    E-Print Network [OSTI]

    Matijevic, Domagoj

    Constant Time Queries for Energy Efficient Paths in Multi-Hop Wireless Networks Stefan Funke stations in such a way that approximately energy optimal paths can be retrieved in constant time, i. Keywords: Ad-Hoc and Sensor Networks, Routing, Power Control, Wireless LANs I. INTRODUCTION Ad hoc radio

  4. Minimizing Energy and Maximizing Network Lifetime Multicasting in Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Liang, Weifa

    Minimizing Energy and Maximizing Network Lifetime Multicasting in Wireless Ad Hoc Networks Weifa Abstract-- Most mobile nodes in a wireless ad hoc network are powered by energy limited batteries, the limited battery lifetime imposes a constraint on the network performance. Therefore, energy efficiency

  5. An Energy Efficient MAC Protocol for Fully Connected Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Zhuang, Weihua

    1 An Energy Efficient MAC Protocol for Fully Connected Wireless Ad Hoc Networks Kamal Rahimi Abstract--Energy efficiency is an important performance mea- sure of wireless network protocols, especially for battery-powered mobile devices such as smartphones. This paper presents a new energy-efficient medium

  6. On Physical Carrier Sensing in Wireless Ad Hoc Xue Yang and Njtin Vaidya

    E-Print Network [OSTI]

    Chen, Yuanzhu Peter

    attenuation and shadowing by obstacles. Second, wireless stations communicate over the air and there is significant interference among stations that are spatially close to each other. Whether two wireless stations power used by the transmitter, etc. Additionally, the quality of the communication link depends

  7. Experiences with a High-Fidelity Wireless Building Energy Auditing Network

    E-Print Network [OSTI]

    Dutta, Prabal

    , Experimentation, Measurement, Performance, Human Factors Keywords Energy, Audit, Building, Power, Wireless, SensorExperiences with a High-Fidelity Wireless Building Energy Auditing Network Xiaofan Jiang, Minh Van and commercial buildings [28] and that 30% of energy consumed in buildings is wasted [29]. To reduce this waste

  8. An Optimal Energy Allocation Algorithm for Energy Harvesting Wireless Sensor Networks

    E-Print Network [OSTI]

    Wong, Vincent

    An Optimal Energy Allocation Algorithm for Energy Harvesting Wireless Sensor Networks Shaobo Mao--With the use of energy harvesting technologies, the lifetime of a wireless sensor network (WSN) can be pro- longed significantly. Unlike a traditional WSN powered by non- rechargeable batteries, the energy

  9. An Energy Efficient Wireless Communication Mechanism for Sensor Node Cluster Heads

    E-Print Network [OSTI]

    Simunic, Tajana

    An Energy Efficient Wireless Communication Mechanism for Sensor Node Cluster Heads Edoardo Regini mechanism to achieve significant energy savings in heterogeneous wireless sensor networks such as HPWREN the backbone. The routing is done by battery-powered nodes using license free radios such as 802

  10. Practical ID-based Encryption for Wireless Sensor Cheng-Kang Chu

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    net- work (WSN). We call it Receiver-Bounded Online/Offline Identity-based Encryption (RB. In this way, a sensor node (with limited computa- tion power and limited storage) in WSN can send encrypted are sent to few receivers. 1. INTRODUCTION A wireless sensor network (WSN) is a wireless network com- posed

  11. Clock synchronization for wireless sensor networks: a survey Bharath Sundararaman, Ugo Buy *, Ajay D. Kshemkalyani

    E-Print Network [OSTI]

    Scheuermann, Peter

    Clock synchronization for wireless sensor networks: a survey Bharath Sundararaman, Ugo Buy *, Ajay 2005; accepted 18 January 2005 Abstract Recent advances in micro-electromechanical (MEMS) technology have led to the development of small, low-cost, and low-power sensors. Wireless sensor networks (WSNs

  12. A Semantic Analysis of Key Management Protocols for Wireless Sensor Networks$

    E-Print Network [OSTI]

    Merro, Massimo

    analysis of three well-known key management protocols for wireless sensor networks: µTESLA, LEAP+ and Li. Introduction Wireless sensors are small and cheap devices powered by low-energy batteries, equipped with radio protocol. Due to resource limitations, all key management protocols for WSNs, such as µTESLA [1], LiSP [2

  13. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, ACCEPTED FOR PUBLICATION 1 Link Energy Minimization in

    E-Print Network [OSTI]

    Heinzelman, Wendi

    , where transmit power can be flexibly adjusted to minimize the energy consumption [7IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, ACCEPTED FOR PUBLICATION 1 Link Energy Minimization in IR-UWB Based Wireless Networks Tianqi Wang, Student Member, IEEE, Wendi Heinzelman, Senior Member

  14. Wireless Sensors and Networks for Advanced Energy Management

    SciTech Connect (OSTI)

    Hardy, J.E.

    2005-05-06

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

  15. Wireless NetworksWireless Networks Wenyuan XuWenyuan Xu

    E-Print Network [OSTI]

    Xu, Wenyuan

    18731873 ­­ ""A Dynamical Theory of the Electromagnetic FieldA Dynamical Theory of the Electromagnetic and Privacy for Emerging Ubiquitous Communication systemion system #12;OutlineOutline Wireless FundamentalsWireless Fundamentals Physical layerPhysical layer Various standards and the corresponding wirelessVarious standards

  16. The lunar Askaryan technique: a technical roadmap

    E-Print Network [OSTI]

    Bray, J D; Buitink, S; Dagkesamanskii, R D; Ekers, R D; Falcke, H; Gayley, K G; Huege, T; James, C W; Mevius, M; Mutel, R L; Protheroe, R J; Scholten, O; Spencer, R E; ter Veen, S

    2015-01-01

    The lunar Askaryan technique, which involves searching for Askaryan radio pulses from particle cascades in the outer layers of the Moon, is a method for using the lunar surface as an extremely large detector of ultra-high-energy particles. The high time resolution required to detect these pulses, which have a duration of around a nanosecond, puts this technique in a regime quite different from other forms of radio astronomy, with a unique set of associated technical challenges which have been addressed in a series of experiments by various groups. Implementing the methods and techniques developed by these groups for detecting lunar Askaryan pulses will be important for a future experiment with the Square Kilometre Array (SKA), which is expected to have sufficient sensitivity to allow the first positive detection using this technique. Key issues include correction for ionospheric dispersion, beamforming, efficient triggering, and the exclusion of spurious events from radio-frequency interference. We review the...

  17. Wireless Device Request Form Department

    E-Print Network [OSTI]

    Wireless Device Request Form Department: Employee ID #: St. Francis Xavier University TSG Contact Date: Part II - Employee Agreement I agree and acknowledge that I have read the Wireless Communications

  18. Entanglement Routers via Wireless Quantum Network Based on Arbitrary Two Qubit Systems

    E-Print Network [OSTI]

    N. Metwally

    2014-05-02

    A wireless quantum network is generated between multi-hop, where each hop consists of two entangled nodes. These nodes share a finite number of entangled two qubit systems randomly. Different types of wireless quantum bridges are generated between the non-connected nodes. The efficiency of these wireless quantum bridges to be used as quantum channels between its terminals to perform quantum teleportation is investigated. We suggest a theoretical wireless quantum communication protocol to teleport unknown quantum signals from one node to another, where the more powerful wireless quantum bridges are used as quantum channels. It is shown that, by increasing the efficiency of the sources which emit the initial partial entangled states, one can increase the efficiency of the wireless quantum communication protocol.

  19. Distributed Connectivity of Wireless Networks

    E-Print Network [OSTI]

    Halldorsson, Magnus M

    2012-01-01

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

  20. A reliability and mass perspective of SP-100 Stirling cycle lunar-base powerplant designs

    SciTech Connect (OSTI)

    Bloomfield, H.S.

    1991-06-01

    The purpose was to obtain reliability and mass perspectives on selection of space power system conceptual designs based on SP-100 reactor and Stirling cycle power-generation subsystems. The approach taken was to: (1) develop a criterion for an acceptable overall reliability risk as a function of the expected range of emerging technology subsystem unit reliabilities; (2) conduct reliability and mass analyses for a diverse matrix of 800-kWe lunar-base design configurations employing single and multiple powerplants with both full and partial subsystem redundancy combinations; and (3) derive reliability and mass perspectives on selection of conceptual design configurations that meet an acceptable reliability criterion with the minimum system mass increase relative to reference powerplant design. The developed perspectives provided valuable insight into the considerations required to identify and characterize high-reliability and low-mass lunar-base powerplant conceptual design.

  1. Center of Excellence WIRELESS AND

    E-Print Network [OSTI]

    California at Davis, University of

    Center of Excellence WIRELESS AND INFORMATION TECHNOLOGY CALL FOR PAPERS INTERNATIONAL CONFERENCE ON CUTTING EDGE WIRELESS AND IT TECHNOLOGIES CREST HOLLOW COUNTRY CLUB, Woodbury, New York November 9, 2004 This conference, organized by the Center of Excellence in Wireless and Information Technology (CEWIT), at Stony

  2. Deflating Wireless Link Basem Shihada

    E-Print Network [OSTI]

    Shihada, Basem

    Deflating Wireless Link Buffers Basem Shihada CEMSE, KAUST #12;Computing and Networking Trends to as computer classes) form, evolve and may eventually die out. Ubiquitous high-speed wireless connectivity is a must. Dense, small-range wireless access points (AP) will become more important than today. Spectrum

  3. Wearable Wireless Electrocardiogram (Quick Doc)

    E-Print Network [OSTI]

    Haykin, Simon

    Wearable Wireless Electrocardiogram (Quick Doc) by Ashwin Ayyaswamy 0542716 Electrical sooner thereby reducing patient wait times. My part of this system is the wearable wireless wirelessly to a computer which exploits Matlab to perform digital operations on the signal and display it

  4. Broadband Wireless Communication in an

    E-Print Network [OSTI]

    Kansas, University of

    Broadband Wireless Communication in an Occupied Frequency Band Dragan Trajkov Joseph Evans James. Project Sponsor: Sprint Corporation Technical Report The University of Kansas #12;1 ABSTRACT The wireless for wireless communications may be insufficient. This report shows a study of how two different systems can use

  5. Wireless Sensor Networks for Healthcare

    E-Print Network [OSTI]

    Lu, Chenyang

    INVITED P A P E R Wireless Sensor Networks for Healthcare In healthcare, there is a strong need, wireless sensor networks for healthcare have emerged in the recent years. In this review, we present some representative applications in the healthcare domain and describe the challenges they introduce to wireless

  6. WILEY WIRELESS COMMUNICATIONS AND MOBILE COMPUTING 1 Cognitive Engine Implementation for Wireless

    E-Print Network [OSTI]

    Kansas, University of

    WILEY WIRELESS COMMUNICATIONS AND MOBILE COMPUTING 1 Cognitive Engine Implementation for Wireless and multicarrier systems. Determining the appropriate radio parameters given a dynamic wireless channel environment is the primary feature of cognitive radios for wireless communication systems. Genetic algorithms (GA

  7. S-MAPEL: Monotonic Optimization for Non-convex Joint Power Control and Scheduling Problems

    E-Print Network [OSTI]

    Huang, Jianwei

    generation wireless networks. Transmission power control in wireless networks has been extensively studied-limited wireless networks where si- multaneous transmissions on nearby links heavily interfere with each other of concurrently active links as well as the flexibility to vary power allocation over time gives rise to a series

  8. Traffic Management and Net Neutrality in Wireless Networks

    E-Print Network [OSTI]

    Jordan, Scott

    2011-01-01

    loops or wireless spectrum and switches or routers. Thesedevices such as routers. Wireless networks incur similar

  9. Lunar Sample Compendium C Meyer 2010

    E-Print Network [OSTI]

    Rathbun, Julie A.

    2672 grams Mineralogical Mode of 15058 Sample catalog Rhodes and Juan et Butler 1971 Hubbard 1973 al basalts returned from the moon, but its lunar orientation is not known with much certainty. The catalog are fluorapatite with minor chloroapatite and trace water (~2400 ± 1100 ppm H2 O). Chemistry O'Kelley et al. (1972

  10. Friday, March 17, 2006 LUNAR REMOTE SENSING

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Friday, March 17, 2006 LUNAR REMOTE SENSING 1:30 p.m. Crystal Ballroom B Chairs: M. S. Robinson D variations due to photometry can mimic those attributed to composition in remote sensing data of planetary D. B. Remote Sensing and Geologic Studies of the Southeastern Quadrant of the Moon [#1815] We report

  11. Wireless energy transmission to supplement energy harvesters in sensor network applications

    SciTech Connect (OSTI)

    Farinholt, Kevin M; Taylor, Stuart G; Park, Gyuhae; Farrar, Charles R

    2010-01-01

    In this paper we present a method for coupling wireless energy transmission with traditional energy harvesting techniques in order to power sensor nodes for structural health monitoring applications. The goal of this study is to develop a system that can be permanently embedded within civil structures without the need for on-board power sources. Wireless energy transmission is included to supplement energy harvesting techniques that rely on ambient or environmental, energy sources. This approach combines several transducer types that harvest ambient energy with wireless transmission sources, providing a robust solution that does not rely on a single energy source. Experimental results from laboratory and field experiments are presented to address duty cycle limitations of conventional energy harvesting techniques, and the advantages gained by incorporating a wireless energy transmission subsystem. Methods of increasing the efficiency, energy storage medium, target applications and the integrated use of energy harvesting sources with wireless energy transmission will be discussed.

  12. UofT Wireless Network Windows Vista

    E-Print Network [OSTI]

    UofT Wireless Network Windows Vista 1. Before you can use the UofT wireless network, you must logging in to the UofT wireless network. There will be a short delay between verifying and being able to access the UofT wireless network. 3. Left-click the wireless icon in the tray area, and click Con- nect

  13. Wireless Control: Opportunities and Challengespp g

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Wireless Control: Opportunities and Challengespp g Karl Henrik Johansson ACCESS Linnaeus Centre Wireless feedback control systemWireless feedback control system · A wireless network of computer devices ablep to monitor and control a physical plant Wireless communication links Sensors Computers Actuators

  14. Thermoelectric Applications to Truck Essential Power

    SciTech Connect (OSTI)

    John C. Bass; Norbert B. Elsner

    2001-12-12

    The subjects covered in this report are: thermoelectrics, 1-kW generator for diesel engine; self-powered heater; power for wireless data transmission; and quantum-well thermoelectrics.

  15. 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)

    2006-07-01

    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)

  16. Passive wireless sensing tags NASA inflatable structures.

    SciTech Connect (OSTI)

    Brocato, Robert Wesley

    2006-03-01

    This report gives a description of several types of wireless, unpowered remote sensors. Surface acoustic wave (SAW) devices were coupled with conventional sensors to create entirely new types of sensors. These sensors report physically measurable data in the same manner as the conventional sensors, but they do it remotely and without any local power source. The sensors are measured remotely using a radar-like interrogation device, and the sensors and their related communication electronics draw all of the power needed for communicating from the radar pulse. The report covers only a description of prototype sensors and not of the manufacturing requirements of these devices.

  17. Pyroelectric Energy Scavenging Techniques for Self-Powered Nuclear...

    Office of Scientific and Technical Information (OSTI)

    Pyroelectric Energy Scavenging Techniques for Self-Powered Nuclear Reactor Wireless Sensor Networks Citation Details In-Document Search Title: Pyroelectric Energy Scavenging...

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

    E-Print Network [OSTI]

    Nguyen, Duy Duc

    2012-01-01

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

  19. Adapting Wireless Technology to Lighting Control and Environmental Sensing

    SciTech Connect (OSTI)

    Dana Teasdale; Francis Rubinstein; Dave Watson; Steve Purdy

    2005-10-01

    The high cost of retrofitting buildings with advanced lighting control systems is a barrier to adoption of this energy-saving technology. Wireless technology, however, offers a solution to mounting installation costs since it requires no additional wiring to implement. To demonstrate the feasibility of such a system, a prototype wirelessly-controlled advanced lighting system was designed and built. The system includes the following components: a wirelessly-controllable analog circuit module (ACM), a wirelessly-controllable electronic dimmable ballast, a T8 3-lamp fixture, an environmental multi-sensor, a current transducer, and control software. The ACM, dimmable ballast, multi-sensor, and current transducer were all integrated with SmartMesh{trademark} wireless mesh networking nodes, called motes, enabling wireless communication, sensor monitoring, and actuator control. Each mote-enabled device has a reliable communication path to the SmartMesh Manager, a single board computer that controls network functions and connects the wireless network to a PC running lighting control software. The ACM is capable of locally driving one or more standard 0-10 Volt electronic dimmable ballasts through relay control and a 0-10 Volt controllable output. The mote-integrated electronic dimmable ballast is designed to drive a standard 3-lamp T8 light fixture. The environmental multi-sensor measures occupancy, light level and temperature. The current transducer is used to measure the power consumed by the fixture. Control software was developed to implement advanced lighting algorithms, including daylight ramping, occupancy control, and demand response. Engineering prototypes of each component were fabricated and tested in a bench-scale system. Based on standard industry practices, a cost analysis was conducted. It is estimated that the installation cost of a wireless advanced lighting control system for a retrofit application is at least 30% lower than a comparable wired system for a typical 16,000 square-foot office building, with a payback period of less than 3 years.

  20. iCalm: Wearable Sensor and Network Architecture for Wirelessly Communicating and Logging Autonomic Activity

    E-Print Network [OSTI]

    Dobson, Kelly

    Widespread use of affective sensing in healthcare applications has been limited due to several practical factors, such as lack of comfortable wearable sensors, lack of wireless standards, and lack of low-power affordable ...

  1. JANUS: A Framework for Scalable and Secure Routing in Hybrid Wireless Networks

    E-Print Network [OSTI]

    Nita-Rotaru, Cristina

    on the transmission power of the base station. The use of cellular services to their full potential is impeded hybrid wireless networks have not been deployed by industry yet, major industry cellphone companies

  2. A survey of intrusion detection in wireless network applications Robert Mitchell, Ing-Ray Chen

    E-Print Network [OSTI]

    Chen, Ing-Ray

    and maintenance costs, many of these systems are largely networked by wireless means. In order to identify gaps area or critical resource (power substation, water treat- ment plant, center of government). Malicious

  3. Wireless energy transfer between anisotropic metamaterials shells

    SciTech Connect (OSTI)

    Díaz-Rubio, Ana; Carbonell, Jorge; Sánchez-Dehesa, José

    2014-06-15

    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.

  4. Two-cell power allocation for downlink CDMA

    E-Print Network [OSTI]

    Zhou, Chi; Zhang, Peifang; Honig, Michael; Jordan, Scott

    2004-01-01

    and S. Jordan, “Two-cell power allocation for wireless datawe have ZHOU et al. : TWO-CELL POWER ALLOCATION FOR DOWNLINKtarget ZHOU et al. : TWO-CELL POWER ALLOCATION FOR DOWNLINK

  5. Context-aware computing for wireless networks

    E-Print Network [OSTI]

    Ergüt, Salih

    2010-01-01

    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. [

  6. 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

  7. 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

  8. Characterizing User Mobility in Wireless Networks

    E-Print Network [OSTI]

    Nunes, Bruno Astuto Arouche

    2012-01-01

    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.

  9. 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

  10. 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. In addition to presenting the general results with respect to the maximum sustainable throughput of wireless

  11. Wireless Gateway Programming Model Qadri Hamarsheh

    E-Print Network [OSTI]

    1 Wireless Gateway Programming Model Qadri Hamarsheh Department of Computer Engineering, Faculty suggests architecture for Wireless Gateway Programming Model that consists of building blocks to solve the technical and business problems of wireless environment. The paper describes various fundamental aspects

  12. Wireless Demand Response Controls for HVAC Systems

    E-Print Network [OSTI]

    Federspiel, Clifford

    2010-01-01

    Linksys WRT54G3G-ST Wireless G router for mobile broadband.This router includes a 4-port switch, a wireless G accessrouters for connecting to the DRAS, and tested the wireless

  13. 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 ...

  14. Miniaturized wireless sensor network

    E-Print Network [OSTI]

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

    2010-01-01

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

  15. Lunar Seismic Profiling Experiment PAGE 1 OF 5

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Lunar Seismic Profiling Experiment (LSPE) ATM 1040 I PAGE 1 OF 5 Aaraapace 5yst:al'n8Divllllon Non~f" /;Z#4-tl-..· SJ Ellison, Mgr. ALSEP Reliability #12;Lunar Seismic Profiling Experin1ent \\LSPEJ Non Bulova BxA BxA, Geotech Geotech Geotech BxA BxA BxA BxA BxA Geotech Geotech #12;Lunar Seismic Pr, g

  16. Secure Wireless Tritium Air Monitoring Cart Development

    Office of Environmental Management (EM)

    Mesh Point ES520 Wireless Link to Backhaul Network (Isolated & Dedicated PC) (Wireless IEEE 802.11) (Ethernet) Fortress ES520s (Serial) Worker Protection System (WPS) PLC...

  17. Radio Imaging by Cooperative Wireless Network: Localization Algorithms and Experiments

    E-Print Network [OSTI]

    Savazzi, Stefano

    -operated wireless sensors. The technology is promising for a wide number of applications ranging from intrusion.e., not carrying electronic device) moving in an area monitored by a dense network of low-power and battery-time mobile positioning. The proposed system is validated by an indoor experimental study that analyzes

  18. Enhancing the decoding performance of optical wireless communication systems

    E-Print Network [OSTI]

    Chen, Sheng

    emitting diodes (LEDs) have been widely utilized for illumination owing to their desired properties of inherent bright output, high efficiency, low power consumption and long life-time. They are also at the receiver of optical wireless communication systems that use white LEDs. The proposed predistortion scheme

  19. Spatial Reuse Enhanced MAC for Wireless Dense Networks

    E-Print Network [OSTI]

    Bahk, Saewoong

    1 Spatial Reuse Enhanced MAC for Wireless Dense Networks Sunheui Ryoo and Saewoong Bahk School) scheme in [4] uses the busy tone to inform neighbor nodes of channel usage, and exchanges Request control for energy efficient communication. It transmits CTS with stronger power to alleviate the hidden

  20. Dynamic Master selection in wireless networks Maurits de Graaf

    E-Print Network [OSTI]

    Boucherie, Richard J.

    the condition that the remaining battery capacity of each node is positive duri' algorithm. 1 Introduction Mobile wireless networks are often battery powered which makes it im- portant = m, maxvV c(v, m) for v = m. (1) Each vertex is equipped with battery supply bv, which is reduced

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

    E-Print Network [OSTI]

    California at Los Angeles, University of

    Wireless Industrial Monitoring and Control using a Smart Sensor Platform Harish Ramamurthy, B. S/RF link specific firmware modules `over-the-air'. Sample implementations for industrial applications attention of the industry on account of reduced costs, better power management, ease in maintenance

  2. Combinatorial structures for Design of Wireless Sensor Networks

    E-Print Network [OSTI]

    Seberry, Jennifer

    of Radio Waves Affect Networking Capabilities An ideal radio wave for wireless technologies should have high speed, travel far distances and consume little energy. Had such radio waves existed, it would have power. Unfortunately, real radio waves do not behave like that. The high speed and long range of a radio

  3. Minimum Energy Coding for Wireless NanoSensor Networks

    E-Print Network [OSTI]

    Shihada, Basem

    Minimum Energy Coding for Wireless NanoSensor Networks Murat Kocaoglu Ozgur B. Akan Next-generation nodes. With their extremely small size, nanosensor nodes can only provide limited energy. Hence, power for their realization. Authors in [1] provide a detailed survey on the state-of-the-art in nanosensors and emphasize

  4. Structural Monitoring of Wind Turbines using Wireless Sensor Networks

    E-Print Network [OSTI]

    Sweetman, Bert

    1 Structural Monitoring of Wind Turbines using Wireless Sensor Networks R. Andrew Swartz1 , Jerome becomes more critical. Wind power has tremendous potential to provide renewable energy without reliance on traditional fossil fuel technologies. Conditional monitoring of wind turbines can help to avert unplanned

  5. Structural Monitoring of Wind Turbines using Wireless Sensor Networks

    E-Print Network [OSTI]

    Lynch, Jerome P.

    1 Structural Monitoring of Wind Turbines using Wireless Sensor Networks R. Andrew Swartz1, Jerome P becomes more critical. Wind power has tremendous potential to provide renewable energy without reliance on traditional fossil fuel technologies. Conditional monitoring of wind turbines can help to avert unplanned

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

    E-Print Network [OSTI]

    Bystroff, Chris

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

  7. Analysis of routing algorithms for Energy harvesting wireless sensor

    E-Print Network [OSTI]

    in Wireless Sensor Network (WSN) should satisfy the features of energy con- sumption optimization and extension of network lifetime. A new class of WSN with the ability of harvesting environment power a comprehensive survey on both energy-ecient and energy harvesting routing algorithms in WSN eld. There are few

  8. WIRELESS COMMUNICATIONS AND MOBILE COMPUTING Wirel. Commun. Mob. Comput. (2015)

    E-Print Network [OSTI]

    Liang, Weifa

    2015-01-01

    as sen- sors are usually powered by energy-limited batteries [4]. With the advance of renewable energy and wind energy [5­11]. Sensors in renewable sensor networks can be recharged repeatedly; thus maximization in unreliable wireless sensor networks with minimal remote data transfer cost Xu Xu1 , Weifa Liang

  9. Self-Triggered Control over Wireless Sensor and Actuator Networks

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Self-Triggered Control over Wireless Sensor and Actuator Networks Jos´e Ara´ujo, Adolfo Anta for the sensor and control nodes, thereby reducing energy consumption and increasing network lifetime, without- oped to reduce power consumption in WSNs. Unfortunately, the situation is much less favorable

  10. Short-Term Solar Energy Forecasting Using Wireless Sensor Networks

    E-Print Network [OSTI]

    Cerpa, Alberto E.

    Short-Term Solar Energy Forecasting Using Wireless Sensor Networks Stefan Achleitner, Tao Liu an advantage for output power prediction. Solar Energy Prediction System Our prediction model is based variability of more then 100 kW per minute. For practical usage of solar energy, predicting times of high

  11. The Lunar Cherenkov Technique: From Parkes Onwards

    E-Print Network [OSTI]

    C. W. James; R. D. Ekers; R. A. McFadden; R. J. Protheroe

    2007-09-03

    The lunar Cherenkov technique, which aims to detect the coherent Cherenkov radiation produced when UHE particles interact in the lunar regolith, was first attempted with the Parkes radio-telescope in 1995, though the theory was not sufficiently developed at this time to calculate a limit on the UHE neutrino flux from the non-observation. Since then, the technique has evolved to include experiments utilising lower frequencies, wider bandwidths, and entire arrays of antenna. We develop a simulation to analyse the full range of experiments, and calculate the UHE neutrino flux limit from the Parkes experiment, including the directional dependence. Our results suggest a methodology for planning future observations, and demonstrate how to utilise all available information on the nature of radio pulses from the Moon for the detection of UHE particles.

  12. Wireless Information Transfer with Opportunistic Energy Harvesting

    E-Print Network [OSTI]

    Liu, Liang; Chua, Kee-Chaing

    2012-01-01

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

  13. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 4, NO. 6, NOVEMBER 2005 2917 On Energy Efficiency and Optimum Resource

    E-Print Network [OSTI]

    Giannakis, Georgios

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 4, NO. 6, NOVEMBER 2005 2917 On Energy Efficiency and Optimum Resource Allocation of Relay Transmissions in the Low-Power Regime Yingwei Yao, Member are expected to play a critical role in the design of wireless networks. This paper investigates the energy

  14. Synchronization of Multiple Levels of Data Fusion in Wireless Sensor Networks Wei Yuan, Srikanth V. Krishnamurthy, and Satish K. Tripathi

    E-Print Network [OSTI]

    Krishnamurthy, Srikanth

    to the severe energy constraints, sensor networks normally employ in-network data fusion [3][4]; the power1 Synchronization of Multiple Levels of Data Fusion in Wireless Sensor Networks Wei Yuan, Srikanth of California, Riverside, Riverside, CA, 92521 Abstract--In wireless sensor networks, in-network data fusion

  15. Power management adaptation techniques for video transmission Christos Bouras1,2,

    E-Print Network [OSTI]

    Bouras, Christos

    Power management adaptation techniques for video transmission over TFRC Christos Bouras1 of the communicating nodes, most notably their transmission power. While increased power generally correlates, Greece SUMMARY In this paper, we describe power management adaptation techniques for wireless video

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

    SciTech Connect (OSTI)

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

    2012-01-01

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

  17. 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

  18. Wireless Communication Device Allowance -1 -Approved: 12/11/2014 Wireless Communication Device Allowance

    E-Print Network [OSTI]

    Hammack, Richard

    Wireless Communication Device Allowance - 1 - Approved: 12/11/2014 Wireless Communication Device of wireless communication devices. "Wireless communication devices" may be, but are not limited to, cell, deployment, and use of wireless communication devices for which authorized employees receive a monetary

  19. Wireless Sensor Network for Electric Transmission Line Monitoring

    SciTech Connect (OSTI)

    Alphenaar, Bruce

    2009-06-30

    Generally, federal agencies tasked to oversee power grid reliability are dependent on data from grid infrastructure owners and operators in order to obtain a basic level of situational awareness. Since there are many owners and operators involved in the day-to-day functioning of the power grid, the task of accessing, aggregating and analyzing grid information from these sources is not a trivial one. Seemingly basic tasks such as synchronizing data timestamps between many different data providers and sources can be difficult as evidenced during the post-event analysis of the August 2003 blackout. In this project we investigate the efficacy and cost effectiveness of deploying a network of wireless power line monitoring devices as a method of independently monitoring key parts of the power grid as a complement to the data which is currently available to federal agencies from grid system operators. Such a network is modeled on proprietary power line monitoring technologies and networks invented, developed and deployed by Genscape, a Louisville, Kentucky based real-time energy information provider. Genscape measures transmission line power flow using measurements of electromagnetic fields under overhead high voltage transmission power lines in the United States and Europe. Opportunities for optimization of the commercial power line monitoring technology were investigated in this project to enable lower power consumption, lower cost and improvements to measurement methodologies. These optimizations were performed in order to better enable the use of wireless transmission line monitors in large network deployments (perhaps covering several thousand power lines) for federal situational awareness needs. Power consumption and cost reduction were addressed by developing a power line monitor using a low power, low cost wireless telemetry platform known as the ''Mote''. Motes were first developed as smart sensor nodes in wireless mesh networking applications. On such a platform, it has been demonstrated in this project that wireless monitoring units can effectively deliver real-time transmission line power flow information for less than $500 per monitor. The data delivered by such a monitor has during the course of the project been integrated with a national grid situational awareness visualization platform developed by Oak Ridge National Laboratory. Novel vibration energy scavenging methods based on piezoelectric cantilevers were also developed as a proposed method to power such monitors, with a goal of further cost reduction and large-scale deployment. Scavenging methods developed during the project resulted in 50% greater power output than conventional cantilever-based vibrational energy scavenging devices typically used to power smart sensor nodes. Lastly, enhanced and new methods for electromagnetic field sensing using multi-axis magnetometers and infrared reflectometry were investigated for potential monitoring applications in situations with a high density of power lines or high levels of background 60 Hz noise in order to isolate power lines of interest from other power lines in close proximity. The goal of this project was to investigate and demonstrate the feasibility of using small form factor, highly optimized, low cost, low power, non-contact, wireless electric transmission line monitors for delivery of real-time, independent power line monitoring for the US power grid. The project was divided into three main types of activity as follows; (1) Research into expanding the range of applications for non-contact power line monitoring to enable large scale low cost sensor network deployments (Tasks 1, 2); (2) Optimization of individual sensor hardware components to reduce size, cost and power consumption and testing in a pilot field study (Tasks 3,5); and (3) Demonstration of the feasibility of using the data from the network of power line monitors via a range of custom developed alerting and data visualization applications to deliver real-time information to federal agencies and others tasked with grid reliability (Tasks 6,8)

  20. Wireless Networks wireless ad-hoc and mesh networks

    E-Print Network [OSTI]

    Biagioni, Edoardo S.

    instead of radio waves Wireless Sensor Networks the Internet of Things, IoT #12;wireless mesh networks radio on and receiving a packet requires the most but even leaving on the radio still uses energy keep the radio off as much as possible, limit the number of packets sent hard to know when to turn on the radio

  1. Multi-hop routing for wireless mesh networks

    E-Print Network [OSTI]

    Bhorkar, Abhijeet

    2012-01-01

    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

    2006-01-01

    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

    2011-01-01

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

  4. Energy Efficiency Maximization of Practical Wireless Communication Systems

    E-Print Network [OSTI]

    ERASLAN, EREN

    2013-01-01

    of Energy Efficiency in Modern Wireless CommunicationLi, “A survey of energy-efficient wireless communications,”optimization for energy- efficient wireless communications:

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

    E-Print Network [OSTI]

    Huang, Yi

    2010-01-01

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

  6. Energy management in wireless healthcare systems using dynamic task assignment

    E-Print Network [OSTI]

    Aghera, Priti

    2010-01-01

    in wireless channel conditions: System energy consumption2007: Microleap: Energy-aware wireless sensor platform forresults in a more energy efficient wireless transmission for

  7. Energy-Efficient Task Assignment Framework for Wireless Sensor Networks

    E-Print Network [OSTI]

    Heemin Park; Mani B. Srivastava

    2003-01-01

    and M.B. Srivastava, Energy- Aware Wireless Microsensorin wireless communications and spending more energy. EnergyAn Energy Ef?cient Fair Scheduling Policy for Wireless

  8. Towards Gigabit and Green 802.11 Wireless Networks

    E-Print Network [OSTI]

    Pefkianakis, Ioannis

    2012-01-01

    Balakrishnan. Minimizing Energy for Wireless Web Access withContext-Sensitive Energy- Efficient Wireless Data Transfer.that control speed and energy over MIMO wireless, named Rate

  9. Smart Object Architecture for Energy-Efficient Wireless Sensors

    E-Print Network [OSTI]

    Ashutosh Verma; Winston Wu; Sridhar Vemuri; Gregory Pottie; William Kaiser

    2003-01-01

    Object Architecture for Energy - Efficient Wireless Sensorsfor multitasking energy-aware wireless sensor systems thatsupport for energy efficient wide-bandwidth wireless Past

  10. Data Analysis and Query Processing in Wireless Sensor Networks

    E-Print Network [OSTI]

    Chatzimilioudis, Georgios

    2010-01-01

    multicasting in energy-constrained wireless networks. IEEEdesign for energy-e?cient wireless sensor networks. Inenergy and maximizing network lifetime multicasting in wireless

  11. Design Considerations for Solar Energy Harvesting Wireless Embedded Systems

    E-Print Network [OSTI]

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

    2005-01-01

    M. Srivastava, “Energy aware wireless microsensor networks”,for Solar Energy Harvesting Wireless Embedded Systems Vijaydesign of solar energy harvesting, wireless embedded systems

  12. Adaptive Scheduling in Ad Hoc and Cellular Wireless Networks

    E-Print Network [OSTI]

    Tan, Choo Chin

    2013-01-01

    multicasting in energy-constrained wireless networks,” IEEEminimum-energy multicasting in wireless ad hoc networks,”minimum-energy multicasting in wireless ad hoc networks,” in

  13. Joint Adaptive Rate and Scheduling in Cellular Wireless Networks

    E-Print Network [OSTI]

    Chang, Hung-Bin

    2015-01-01

    Aided Failover for Multicast Scheduling in Wireless CellularVideo Multicast for Multi-cell Cellular Wireless Net-and Uplink Fractional Frequency Reuse in Cellular Wireless

  14. Minimum-Energy Broadcast Using Practical Directional Antennas in All-Wireless Networks

    E-Print Network [OSTI]

    Li, Xiang-Yang

    . Such decentralized networks can enable flexible, infrastructure-less and robust data and service access to support is to adjust the transmission power of individual nodes so as to minimize the overall transmission power]. Using omnidirectional antennas in wireless ad hoc networks can be highly inefficient in terms of power

  15. The TFRC protocol and its usage for wireless video transmission Christos Bouras1,2

    E-Print Network [OSTI]

    Bouras, Christos

    ) protocol in the area of efficient wireless video transmission and its possible usage in cross-layer power-layer approaches for adaptation of the power transmission level of the sender and TFRC feedback information, and therefore user experience, without unnecessary power consumption. INTRODUCTION Networking complexity has led

  16. Wireless Networks 11, 135148, 2005 2005 Springer Science + Business Media, Inc. Manufactured in The Netherlands.

    E-Print Network [OSTI]

    between energy-saving protocols and TCP performance for Web-like transfers. We show that the popular IEEE 802.11 power-saving mode (PSM), a "static" protocol, can harm performance by increasing fast round to no power management). Keywords: wireless, protocols, energy saving, power saving, bounded slowdown, IEEE

  17. LUNAR SEISMIC PROFILING EXPERIMENT DESIGN VERIFICATION THERMAL PAGI OF

    E-Print Network [OSTI]

    Rathbun, Julie A.

    ATM 1109 LUNAR SEISMIC PROFILING EXPERIMENT DESIGN VERIFICATION THERMAL PAGI OF VACUUM TEST DATE 9 SEISMIC PROFILING EXPERIMENT DESIGN VERIFICATION THERMAL VACUUM TEST LIST OF TABLES AND FIGURES;Figure 4.9 5. 1 5.2 5.3-5.4 5.5 5.6 5.7-5.8 LUNAR SEISMIC PROFILING EXPERIMENT DESIGN VERIFICATION

  18. Thursday, March 15, 2007 POSTER SESSION II: LUNAR METEORITES

    E-Print Network [OSTI]

    Rathbun, Julie A.

    2977, and NWA 3160 [#2109] We discuss the petrography, geochemistry, and pairing relationships. A. Russell S. S. Petrography and Bulk Composition of Miller Range 05035: A New Lunar VLT Gabbro 05035: Petrography and Mineralogy [#2103] Characterization of new lunar meteorite MIL05035 and its

  19. Integrated Modeling and Simulation of Lunar Exploration Campaign Logistics

    E-Print Network [OSTI]

    Integrated Modeling and Simulation of Lunar Exploration Campaign Logistics Sarah A. Shull, Olivier Campaign Logistics by Sarah A. Shull B.S.E. Aerospace Engineering (2001) The University of Michigan) #12;4 Integrated Modeling and Simulation of Lunar Exploration Campaign Logistics by Sarah A. Shull

  20. A quasi-economic role for lunar science

    SciTech Connect (OSTI)

    Jones, E.M.

    1989-01-01

    In broad economic terms, the development of lunar products will begin with a sequence of technology, production, and delivery demonstrations which will have to precede the emergence of markets. Economically viable products will tend to be those for which the sum of production and transport costs are lower for lunar suppliers than for terrestrial suppliers. As long as lunar production costs exceed terrestrial production costs -- as will be the case for most lunar products until such time as lunar development has reached a mature stage -- the most viable industries will be those producing low-tech products for lunar markets. The scale of initial lunar markets will depend on the size of a lunar base and/or its rate of growth. For a given level of public support, maximum base size can be achieved through the conduct, at the base, of a vigorous program of scientific and engineering research making use of as much local production and as many permanently-resident support staff as feasible. 5 refs.

  1. Icy wave-cloud lunar corona and cirrus iridescence

    E-Print Network [OSTI]

    Shaw, Joseph A.

    Icy wave-cloud lunar corona and cirrus iridescence Joseph A. Shaw* and Nathan J. Pust Electrical to determine that iridescence in cirrus and a lunar corona in a thin wave cloud were caused by tiny ice conventional ice crystals. The iridescent cloud was located at the tropopause [11­13:6 km above mean sea level

  2. Topography of the Lunar Poles from Radar Interferometry: A

    E-Print Network [OSTI]

    Margot, Jean-Luc

    Topography of the Lunar Poles from Radar Interferometry: A Survey of Cold Trap Locations J. L. Margot,1 * D. B. Campbell,1 R. F. Jurgens,2 M. A. Slade2 Detailed topographic maps of the lunar poles are 1030 and 2550 square kilometers for the north and south poles, respectively. Topographic depressions

  3. The rationale/benefits of nuclear thermal rocket propulsion for NASA's lunar space transportation system

    SciTech Connect (OSTI)

    Borowski, S.K.

    1994-09-01

    The solid core nuclear thermal rocket (NTR) represents the next major evolutionary step in propulsion technology. With its attractive operating characteristics, which include high specific impulse (approximately 850-1000 s) and engine thrust-to-weight (approximately 4-20), the NTR can form the basis for an efficient lunar space transportation system (LTS) capable of supporting both piloted and cargo missions. Studies conducted at the NASA Lewis Research Center indicate that an NTR-based LTS could transport a fully-fueled, cargo-laden, lunar excursion vehicle to the Moon, and return it to low Earth orbit (LEO) after mission completion, for less initial mass in LEO than an aerobraked chemical system of the type studied by NASA during its '90-Day Study.' The all-propulsive NTR-powered LTS would also be 'fully reusable' and would have a 'return payload' mass fraction of approximately 23 percent--twice that of the 'partially reusable' aerobraked chemical system. Two NTR technology options are examined--one derived from the graphite-moderated reactor concept developed by NASA and the AEC under the Rover/NERVA (Nuclear Engine for Rocket Vehicle Application) programs, and a second concept, the Particle Bed Reactor (PBR). The paper also summarizes NASA's lunar outpost scenario, compares relative performance provided by different LTS concepts, and discusses important operational issues (e.g., reusability, engine 'end-of life' disposal, etc.) associated with using this important propulsion technology.

  4. Wireless energy transfer between anisotropic metamaterials shells

    E-Print Network [OSTI]

    Diaz-Rubio, Ana; Sanchez-Dehesa, Jose

    2013-01-01

    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.

  5. PROBING LUNAR VOLATILES: INITIAL GROUND-BASED RESULTS. A. Crotts , D. Austin

    E-Print Network [OSTI]

    Savin, Daniel Wolf

    of episodic lunar events (moon- quakes, outgassing events, radon release episodes and optical transient lunar that these reported events are likely due to real lunar outgassing (~85% of the time by our estimates), since lunar outgassing might generate TLPs, other ways in which events might interact with the regolith

  6. Thursday, March 15, 2007 POSTER SESSION II: LUNAR MISSIONS AND INSTRUMENTS

    E-Print Network [OSTI]

    Rathbun, Julie A.

    . Seismic Observation by the Seismometer on Board the Penetrator for Lunar Exploration [#1503] The seismic Yue Z. Xie H. Liu J. Ouyang Z. An Introduction of Chinese Lunar Exploration Program [#2082] China has. Vostrukhin A. Lunar Exploration Neutron Detector (LEND) for NASA Lunar Reconnaissance Orbiter [#1648

  7. High-Density Wireless Neural Recording System

    E-Print Network [OSTI]

    Chae, Moo Sung

    2013-01-01

    wireless FM IC for biopotential recording applications,” inInterference in Biopotential Measurements,” Instrumentation

  8. Efficient Strategyproof Multicast in Selfish Wireless Networks

    E-Print Network [OSTI]

    Li, Xiang-Yang

    since wireless nodes are energy-constraint and it is often not in the interest of a node to always relayChapter 1 Efficient Strategyproof Multicast in Selfish Wireless Networks In this chapter, we study how to perform routing when each wireless node is selfish, i.e., a wireless node will always maximize

  9. Ontological Configuration Management for Wireless Mesh Routers

    E-Print Network [OSTI]

    Tourińo, Juan

    Ontological Configuration Management for Wireless Mesh Routers Iv´an D´iaz , Cristian Popi then be managed homogeneously. We chose the configuration of a modular wireless router developed by the Image botanique 54602 Villers-les-Nancy, France Abstract. Wireless mesh networks (WMNs) are a category of wireless

  10. Lunar and Planetary Science Conference

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousandReport) | SciTech Connect Lower-EnergyrespondsPDFscience

  11. WIRELESS Eduroam Wireless Network for College Eduroam is a global wireless roaming consortium which gives members of education and research

    E-Print Network [OSTI]

    Capdeboscq, Yves

    WIRELESS Eduroam Wireless Network for College Eduroam is a global wireless roaming consortium://cat.eduroam.org (You can visit https://cat.eduroam.org whilst connected to the OWL wireless network without a password://register.it.ox.ac.uk/self/remote_access If you are already in Oxford you can get to this URL via the OWL wireless network 2. Once you have

  12. Views of wireless network systems.

    SciTech Connect (OSTI)

    Young, William Frederick; Duggan, David Patrick

    2003-10-01

    Wireless networking is becoming a common element of industrial, corporate, and home networks. Commercial wireless network systems have become reliable, while the cost of these solutions has become more affordable than equivalent wired network solutions. The security risks of wireless systems are higher than wired and have not been studied in depth. This report starts to bring together information on wireless architectures and their connection to wired networks. We detail information contained on the many different views of a wireless network system. The method of using multiple views of a system to assist in the determination of vulnerabilities comes from the Information Design Assurance Red Team (IDART{trademark}) Methodology of system analysis developed at Sandia National Laboratories.

  13. Wireless Control Systems:Wireless Control Systems: Scientific Challenges andScientific Challenges and

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Wireless Control Systems:Wireless Control Systems: Scientific Challenges andScientific Challenges and Emerging ApplicationsEmerging Applications Karl Henrik Johansson School of Electrical Engineering Royal, Greece 27-29 Jun, 2007 © Karl H. Johansson, Wireless control Acknowledgements

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

    E-Print Network [OSTI]

    Dai, Lillian Lei, 1978-

    2008-01-01

    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 ...

  15. 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)

    2012-05-08

    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.

  16. Self organization of wireless sensor networks using ultra-wideband radios

    DOE Patents [OSTI]

    Dowla, Farid U. (Castro Valley, CA); Nekoogar, Franak (San Ramon, CA); Spiridon, Alex (Palo Alto, CA)

    2009-06-16

    A novel UWB communications method and system that provides self-organization for wireless sensor networks is introduced. The self-organization is in terms of scalability, power conservation, channel estimation, and node synchronization in wireless sensor networks. The UWB receiver in the present invention adds two new tasks to conventional TR receivers. The two additional units are SNR enhancing unit and timing acquisition and tracking unit.

  17. Digital ADCs and ultra-wideband RF circuits for energy constrained wireless applications by Denis Clarke Daly.

    E-Print Network [OSTI]

    Daly, Denis Clarke

    2009-01-01

    Ongoing advances in semiconductor technology have enabled a multitude of portable, low power devices like cellular phones and wireless sensors. Most recently, as transistor device geometries reach the nanometer scale, ...

  18. Efficiency enhancement techniques for RF and millimeter wave power amplifiers

    E-Print Network [OSTI]

    Ogunnika, Olumuyiwa Temitope, 1978-

    2012-01-01

    Power amplifiers are the circuit blocks in wireless transceivers that require the largest power budget because of their relatively low efficiencies. RF designers cannot depend solely on the development better semiconductor ...

  19. Design and fabrication of an RF power LDMOSFET on SOI

    E-Print Network [OSTI]

    Fiorenza, James G. (James George), 1972-

    2002-01-01

    This thesis studied thin-film Silicon-on-Insulator (SOI) LDMOSFET technology for RF power amplifier applications. To conduct this study, two generations of SOI RF power devices for portable wireless systems were designed ...

  20. Recommended Practices Guide For Securing ZigBee Wireless Networks...

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

    Wireless Networks in Process Control System Environments More Documents & Publications Wireless System Considerations When Implementing NERC Critical Infrastructure Protection...