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Note: This page contains sample records for the topic "lunar wireless power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Wireless Power Transmission  

Office of Scientific and Technical Information (OSTI)

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

2

Power options for lunar exploration  

SciTech Connect

This paper presents an overview of the types of power systems available for providing power on the moon. Lunar missions of exploration, in situ resource utilization, and colonization will be constrained by availability of adequate power. The length of the lunar night places severe limitations on solar power system designs, because a large portion of the system mass is devoted to energy storage. The selection of the ideal power source hardware will require compatibility with not only the lunar base power requirements and environment, but also with the conversion, storage, and transmission equipment. In addition, further analysis to determine the optimum operating parameters for a given power system should be conducted so that critical technologies can be identified in the early stages of base development. This paper describes the various concepts proposed for providing power on the lunar surface and compare their ranges of applicability. The importance of a systems approach to the integration of these components will also be discussed.

Bamberger, J.A.; Gaustad, K.L.

1992-01-01T23:59:59.000Z

3

Lunar Base Thermoelectric Power Station Study  

Science Journals Connector (OSTI)

Under NASA’s Project Prometheus the Nuclear Space Power Systems Program the Jet Propulsion Laboratory Pratt & Whitney Rocketdyne and Teledyne Energy Systems have teamed with a number of universities under the Segmented Thermoelectric Multicouple Converter (STMC) Task to develop the next generation of advanced thermoelectric converters for space reactor power systems. Work on the STMC converter assembly has progressed to the point where the lower temperature stage of the segmented multicouple converter assembly is ready for laboratory testing and promising candidates for the upper stage materials have been identified and their properties are being characterized. One aspect of the program involves mission application studies to help define the potential benefits from the use of these STMC technologies for designated NASA missions such as a lunar base power station where kilowatts of power would be required to maintain a permanent manned presence on the surface of the moon. A modular 50 kWe thermoelectric power station concept was developed to address a specific set of requirements developed for this particular mission concept. Previous lunar lander concepts had proposed the use of lunar regolith as in?situ radiation shielding material for a reactor power station with a one kilometer exclusion zone radius to minimize astronaut radiation dose rate levels. In the present concept we will examine the benefits and requirements for a hermetically?sealed reactor thermoelectric power station module suspended within a man?made lunar surface cavity. The concept appears to maximize the shielding capabilities of the lunar regolith while minimizing its handling requirements. Both thermal and nuclear radiation levels from operation of the station at its 100?m exclusion zone radius were evaluated and found to be acceptable. Site preparation activities are reviewed as well as transport issues for this concept. The goal of the study was to review the entire life cycle of the unit to assess its technical problems and technology needs in all areas to support the development deployment operation and disposal of the unit.

William Determan; Patrick Frye; Jack Mondt; Jean?Pierre Fleurial; Ken Johnson; Gerhard Stapfer; Michael Brooks; Ben Heshmatpour

2006-01-01T23:59:59.000Z

4

Lunar Base Thermoelectric Power Station Study  

SciTech Connect

Under NASA's Project Prometheus, the Nuclear Space Power Systems Program, the Jet Propulsion Laboratory, Pratt and Whitney Rocketdyne, and Teledyne Energy Systems have teamed with a number of universities, under the Segmented Thermoelectric Multicouple Converter (STMC) Task, to develop the next generation of advanced thermoelectric converters for space reactor power systems. Work on the STMC converter assembly has progressed to the point where the lower temperature stage of the segmented multicouple converter assembly is ready for laboratory testing, and promising candidates for the upper stage materials have been identified and their properties are being characterized. One aspect of the program involves mission application studies to help define the potential benefits from the use of these STMC technologies for designated NASA missions such as a lunar base power station where kilowatts of power would be required to maintain a permanent manned presence on the surface of the moon. A modular 50 kWe thermoelectric power station concept was developed to address a specific set of requirements developed for this particular mission concept. Previous lunar lander concepts had proposed the use of lunar regolith as in-situ radiation shielding material for a reactor power station with a one kilometer exclusion zone radius to minimize astronaut radiation dose rate levels. In the present concept, we will examine the benefits and requirements for a hermetically-sealed reactor thermoelectric power station module suspended within a man-made lunar surface cavity. The concept appears to maximize the shielding capabilities of the lunar regolith while minimizing its handling requirements. Both thermal and nuclear radiation levels from operation of the station, at its 100-m exclusion zone radius, were evaluated and found to be acceptable. Site preparation activities are reviewed as well as transport issues for this concept. The goal of the study was to review the entire life cycle of the unit to assess its technical problems and technology needs in all areas to support the development, deployment, operation and disposal of the unit.

Determan, William; Frye, Patrick [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109 (United States); Mondt, Jack; Fleurial, Jean-Pierre; Johnson, Ken; Stapfer, Gerhard [Pratt and Whitney Rocketdyne Inc., P.O. Box 7922, Canoga Park, CA 91309 (United States); Brooks, Michael; Heshmatpour, Ben [Teledyne Energy Systems, Inc., 10707 Gilroy Rd, Hunt Valley, MD 21031 (United States)

2006-01-20T23:59:59.000Z

5

Wireless Power Transfer  

ScienceCinema (OSTI)

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

None

2013-11-19T23:59:59.000Z

6

Virtualizing Power Cords by Wireless Power Transmission and Energy Harvesting  

E-Print Network (OSTI)

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

Tentzeris, Manos

7

Wireless power transfer to deep-tissue microimplants  

Science Journals Connector (OSTI)

...inductive power link for a wireless endoscope . Biosens Bioelectron...202 . 16 Kurs A ( 2007 ) Wireless power transfer via strongly...energy harvesting: Generating electricity during walking with minimal...resonance-based efficient wireless power delivery systems for biomedical...

John S. Ho; Alexander J. Yeh; Evgenios Neofytou; Sanghoek Kim; Yuji Tanabe; Bhagat Patlolla; Ramin E. Beygui; Ada S. Y. Poon

2014-01-01T23:59:59.000Z

8

Reducing Power Consumption of Wireless Pulse Oximeters  

Science Journals Connector (OSTI)

Purpose...– To implement the signal processing algorithms into a data evaluation unit powered by mains electricity whilst the measuring head is powered by ... it is still not used in today’s wireless

N. Stuban; M. Niwayama

2012-01-01T23:59:59.000Z

9

Optimal Operating Frequency in Wireless Power Transmission for Implantable Devices  

E-Print Network (OSTI)

Optimal Operating Frequency in Wireless Power Transmission for Implantable Devices Ada S. Y. Poon, Stephen O'Driscoll, and Teresa H. Meng Abstract-- This paper examines short-range wireless power- ing run on power levels ranging from 10 µW to 1 mW. However, the wireless interface for both power

Poon, Ada

10

Power and spectrum efficient communications in wireless ad hoc networks  

E-Print Network (OSTI)

Ephremides, “Joint Scheduling and Power Control for WirelessOptimal Power Control, Scheduling, and Routing in UWBDistributed Joint Scheduling and Power Control Algorithm for

Qu, Qi

2008-01-01T23:59:59.000Z

11

Space reactor/Stirling cycle systems for high power Lunar applications  

SciTech Connect

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.

Schmitz, P.D. [Sverdrup Technology, Inc., Brook Park, OH (United States). Lewis Research Center Group; Mason, L.S. [National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center

1994-09-01T23:59:59.000Z

12

A Realistic Power Consumption Model for Wireless Sensor Network Devices  

E-Print Network (OSTI)

1 A Realistic Power Consumption Model for Wireless Sensor Network Devices Qin Wang, Mark Hempstead}@eecs.harvard.edu Abstract-- A realistic power consumption model of wireless communication subsystems typically used in many sensor network node devices is presented. Simple power consumption models for major components

Hempstead, Mark

13

Wireless power transmission using ultrasonic guided waves  

Science Journals Connector (OSTI)

The unavailability of suitable power supply at desired locations is currently an important obstacle in the development of distributed, wireless sensor networks for applications such as structural health monitoring of aircraft. Proposed solutions range from improved batteries to energy harvesting from vibration, temperature gradients and other sources. A novel approach is being investigated at Cardiff University School of Engineering in cooperation with Airbus. It aims to utilise ultrasonic guided Lamb waves to transmit energy through the aircraft skin. A vibration generator is to be placed in a location where electricity supply is readily available. Ultrasonic waves generated by this device will travel through the aircraft structure to a receiver in a remote wireless sensor node. The receiver will convert the mechanical vibration of the ultrasonic waves back to electricity, which will be used to power the sensor node. This paper describes the measurement and modelling of the interference pattern which emerges when Lamb waves are transmitted continuously as in this power transmission application. The discovered features of the pattern, such as a large signal amplitude variation and a relatively high frequency, are presented and their importance for the development of a power transmission system is discussed.

A Kural; R Pullin; C Featherston; C Paget; K Holford

2011-01-01T23:59:59.000Z

14

11 - Energy harvesters for powering wireless systems  

Science Journals Connector (OSTI)

Abstract: This chapter focuses on the strategies and devices used to convert the energy present in the environment into electricity to supply wireless and mobile systems. The ‘energy harvesting’ discipline is proving to be the first relevant response to the need for power supply without wire connections and batteries. Many transduction principles were investigated, and a number of design solutions were described in the literature. This chapter aims to provide the tools for static and dynamic design of energy harvesters, with focus on kinetic generators. Some innovative design solutions are introduced, and the most attractive modelling and simulation strategies are described.

G. De Pasquale

2013-01-01T23:59:59.000Z

15

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

SciTech Connect

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.

John Darrell Bess

2008-06-01T23:59:59.000Z

16

Energy Parameter Estimation in Solar Powered Wireless Sensor Networks  

Science Journals Connector (OSTI)

The operation of solar powered wireless sensor networks is associated with ... the main challenges is the high variability of solar power input and battery capacity, due to factors such as weather, ... sensor net...

Mustafa Mousa; Christian Claudel

2014-01-01T23:59:59.000Z

17

Design and emplacement of an integrated lunar power system---issues and concerns  

SciTech Connect

Numerous issues regarding the construction and operation of a stationary lunar surface power system must be resolved within the coming decade before man's permanent presence on the lunar surface becomes a viable possibility. Some of the issues which need to be resolved during the early stages of this planning phase include: whether the electrical power system should be centralized, decentralized, or a combination of the two; whether power transmission should be ac or dc; what mix of power generating technology should be used (nuclear, isotope, photovoltaic, or regenerative fuel cells, for example); and determining the physical interface requirements between the power system hardware and the construction equipment to be used in emplacing this hardware on the lunar surface (from launch at the Kennedy Space Center---KSC---to erection and start-up on the moon). This paper preliminarily addresses these issues.

Sprouse, K.M.; Robin, J.E.; Metcalf, K.J. (Rocketdyne Division, Rockwell International Corporation, 6633 Canoga Avenue, Canoga Park, California (USA)); Cataldo, R. (NASA Lewis Research Center, Cleveland, Ohio (USA))

1991-01-10T23:59:59.000Z

18

Wireless electricity (Power) transmission using solar based power satellite technology  

Science Journals Connector (OSTI)

In the near future due to extensive use of energy, limited supply of resources and the pollution in environment from present resources e.g. (wood, coal, fossil fuel) etc, alternative sources of energy and new ways to generate energy which are efficient, cost effective and produce minimum losses are of great concern. Wireless electricity (Power) transmission (WET) has become a focal point as research point of view and nowadays lies at top 10 future hot burning technologies that are under research these days. In this paper, we present the concept of transmitting power wirelessly to reduce transmission and distribution losses. The wired distribution losses are 70 – 75% efficient. We cannot imagine the world without electric power which is efficient, cost effective and produce minimum losses is of great concern. This paper tells us the benefits of using WET technology specially by using Solar based Power satellites (SBPS) and also focuses that how we make electric system cost effective, optimized and well organized. Moreover, attempts are made to highlight future issues so as to index some emerging solutions.

M Maqsood; M Nauman Nasir

2013-01-01T23:59:59.000Z

19

Vidyut: exploiting power line infrastructure for enterprise wireless networks  

Science Journals Connector (OSTI)

Global synchronization across time and frequency domains significantly benefits wireless communications. Multi-Cell (Network) MIMO, interference alignment solutions, opportunistic routing techniques in ad-hoc networks, OFDMA etc. all necessitate synchronization ... Keywords: frequency synchronization, network mimo, power line communications, time synchronization, wireless networks

Vivek Yenamandra, Kannan Srinivasan

2014-08-01T23:59:59.000Z

20

Power Control and Transmission Scheduling for Network Utility Maximization in Wireless Networks  

E-Print Network (OSTI)

Power Control and Transmission Scheduling for Network Utility Maximization in Wireless Networks Min power control and transmis- sion scheduling problem in wireless networks with average power constraints. Index Terms--Network utility maximization, power control, transmission scheduling, column generation I

Sharma, Vinod

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


21

Low Power Filtering Techniques for Wideband and Wireless Applications  

E-Print Network (OSTI)

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...

Gambhir, Manisha

2010-10-12T23:59:59.000Z

22

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 7, NO. 2, FEBRUARY 2008 685 Power-Efficient Wireless OFDMA  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 7, NO. 2, FEBRUARY 2008 685 Power-Efficient-- Feedback communication, frequency division multiaccess, minimum energy control, optimization methods/DVB) standards and wireless local area networks [6], [14]. Spectral efficiency and error resilience

Giannakis, Georgios

23

Energy Efficient Scheduling with Power Control for Wireless Networks  

E-Print Network (OSTI)

Energy Efficient Scheduling with Power Control for Wireless Networks Bastian Katz Institute the complexity of scheduling with power control in the SINRG model of interference. Based on a novel scheme) and less energy consumption: power control admits schedules that would otherwise violate interference

Paris-Sud XI, Université de

24

Joint Power-Delay Minimization in Green Wireless Access Networks  

E-Print Network (OSTI)

, adapting power consumption to traffic load [3] or devising intelligent network deployment strategies using an optimization problem that jointly minimizes the power consumption of the network and the sum of data unitJoint Power-Delay Minimization in Green Wireless Access Networks Farah Moety, Samer Lahoud, Kinda

Paris-Sud XI, Université de

25

A study of low level vibrations as a power source for wireless sensor nodes  

Science Journals Connector (OSTI)

Advances in low power VLSI design, along with the potentially low duty cycle of wireless sensor nodes open up the possibility of powering small wireless computing devices from scavenged ambient power. A broad review of potential power scavenging technologies ... Keywords: Energy scavenging, Self powered wireless sensing, Vibration to electricity conversion

Shad Roundy; Paul K. Wright; Jan Rabaey

2003-07-01T23:59:59.000Z

26

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

SciTech Connect

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.

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

2012-01-01T23:59:59.000Z

27

Utilizing Solar Power in Wireless Sensor Networks  

Science Journals Connector (OSTI)

Sensor networks are designed especially for deploymentin adverse and non-accessible areas without a fixed infrastructure.Therefore, energy conservation plays a crucialrole for these networks. We propose to utilize solar powerin wireless sensor networks, ...

Thiemo Voigt; Hartmut Ritter; Jochen Schiller

2003-10-01T23:59:59.000Z

28

Minimum Power Configuration for Wireless Communication in Sensor Networks  

E-Print Network (OSTI)

conserve more energy than exist- ing minimum power routing and topology control protocols. Furthermore configuration, ad hoc net- works, energy efficiency, wireless communications Part of this article was published aggressively conserve energy in order to operate for extensive periods without wired power sources. Since

29

Saving Energy by Adjusting Transmission Power in Wireless Sensor Networks  

E-Print Network (OSTI)

and communication areas. Energy-efficient communication is an important issue in WSNs because of the limited power distributed algorithms to reduce communication energy consumption in WSNs by minimizing the total transmissionSaving Energy by Adjusting Transmission Power in Wireless Sensor Networks Xiao Chen Department

Rowe, Neil C.

30

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

E-Print Network (OSTI)

A Scheduling Algorithm for Consistent Monitoring Results with Solar Powered High but critical task for solar powered wireless high power embedded systems. Our algorithm relies on an energy

Simunic, Tajana

31

Nuclear power systems for Lunar and Mars exploration  

SciTech Connect

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.

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

1994-09-01T23:59:59.000Z

32

Efficient Asynchronous Low Power Listening for Wireless Sensor Networks  

E-Print Network (OSTI)

Efficient Asynchronous Low Power Listening for Wireless Sensor Networks Rajesh Krishna Panta, James mechanism to reduce energy consumption of sensor devices and to increase the lifetime of the network. A side during idle listening--the time period for which the radio transceiver of a sensor node is awake

Fisher, Kathleen

33

An Ultra-Wearable, Wireless, Low Power ECG Monitoring System  

E-Print Network (OSTI)

An Ultra-Wearable, Wireless, Low Power ECG Monitoring System Chulsung Park and Pai H. Chou., Suite 107 San Diego, CA 92121, USA Abstract-- Wearable electrocardiograph (ECG) monitoring systems today performance to gold standard ECG electrodes, has been developed. This paper presents a description

Shinozuka, Masanobu

34

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

E-Print Network (OSTI)

Power Electronics Design of a Solar Powered In-car Wireless Tag for Asset Tracking and Parking and testing of a power conditioning circuit for a solar powered in-car wireless tag for asset tracking. A suitable solar cell was chosen for its high power density. Charging circuit, hysteresis control circuit

35

Lunar electric power systems utilizing the SP?100 reactor coupled to dynamic conversion systems  

Science Journals Connector (OSTI)

An integration study was performed by Rocketdyne coupling an SP?100 reactor to either a Brayton Stirling or K?Rankine 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 National Aeronautics and Space Administration (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 standby unit. Integration design studies indicated that either of the three power conversion systems could be integrated with the SP?100 reactor. From a performance consideration the Brayton and Stirling mass was approximately 45% higher than the K?Rankine. The K?Rankine radiator area was 45% of the Stirling which in turn was about 40% of the Brayton.

Richard B. Harty; Gregory A. Johnson

1992-01-01T23:59:59.000Z

36

Three-dimensional thermal analysis of wirelessly powered light-emitting systems  

Science Journals Connector (OSTI)

...geometrical parameters and thermal conductivities of the...bio-implanted applications. thermal analysis|wireless...wireless power, instead of batteries, could bring additional...battery replacement and battery biocompatibility. Recently...bio-integrated applications. The thermal behaviour of such systems...

2012-01-01T23:59:59.000Z

37

Novel "Smart Cube" Wireless Sensors with Embedded Processing/Communication/Power Core for "Smart  

E-Print Network (OSTI)

and measurement data. II. BACKGROUND DATA A. RFID Sensors The two responsibilities of wireless sensorsNovel "Smart Cube" Wireless Sensors with Embedded Processing/Communication/Power Core for "Smart presents a novel topology of isotropically radiating "smart cubes" for use in wireless sensors. The novelty

Tentzeris, Manos

38

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

E-Print Network (OSTI)

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

Mandayam, Narayan

39

Advanced Wireless Power Transfer Vehicle and Infrastructure Analysis (Presentation)  

SciTech Connect

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.

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

2014-06-01T23:59:59.000Z

40

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

E-Print Network (OSTI)

Design and Analysis of Micro-Solar Power Systems for Wireless Sensor Networks Jaein Jeong, Xiaofan,fxjiang,culler}@eecs.berkeley.edu Abstract-- Wireless Sensor Networks are fundamentally limited by their energy storage resources and the power they obtain from their environment. Several micro-solar powered designs have been developed

Culler, David E.

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


41

Joint Scheduling, Power Control and Routing in Symmetric, One-dimensional, Multi-hop Wireless Networks  

E-Print Network (OSTI)

Joint Scheduling, Power Control and Routing in Symmetric, One-dimensional, Multi-hop Wireless scheduling, routing and power control that achieves max-min fair rate allocation in a multi-hop wireless that a traditional layering network approach, separating routing, scheduling, flow and power control

Paris-Sud XI, Université de

42

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

E-Print Network (OSTI)

1 Quantitative Analysis of Transmission Power Control in Wireless Ad-hoc Networks Seung-Jong Park the issue of transmission power con- trol in wireless ad-hoc networks. In general, it is assumed that minimum transmission power achieves the optimal throughput of an ad-hoc network because it produces

Park, Seung-Jong "Jay"

43

Wireless Power Transfer for Electric Vehicles  

SciTech Connect

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.

Scudiere, Matthew B [ORNL; McKeever, John W [ORNL

2011-01-01T23:59:59.000Z

44

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

E-Print Network (OSTI)

Design and Analysis of Micro-Solar Power Systems for Wireless Sensor Networks Jaein Jeong Xiaofan or to redistribute to lists, requires prior specific permission. #12;Design and Analysis of Micro-Solar Power Systems for Wireless Sensor Networks Jaein Jeong, Xiaofan Jiang and David Culler EECS Department, University

California at Berkeley, University of

45

Power Controlled Minimum Frame Length Scheduling in TDMA Wireless Networks with  

E-Print Network (OSTI)

Power Controlled Minimum Frame Length Scheduling in TDMA Wireless Networks with Sectored Antennas controlled min- imum frame length scheduling for TDMA wireless networks. Given a set of one-hop transmission scheduling and power control was first addressed by Tamer and Ephremides in [1, 2]. Given a set of one

Arabshahi, Payman

46

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

E-Print Network (OSTI)

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

Voigt, Thiemo

47

WIRELESS HELIOSTAT AND CONTROL SYSTEM FOR LARGE SELF-POWERED HELIOSTAT FIELDS  

E-Print Network (OSTI)

WIRELESS HELIOSTAT AND CONTROL SYSTEM FOR LARGE SELF-POWERED HELIOSTAT FIELDS Dr. Stephan Kubisch 1 of a wireless mesh network as control technology in a field of self-powered heliostats, thus eliminating heliostats field to be build in the future: About 100 small communication devices, so called Helio

Turau, Volker

48

Photovoltaic array driven adjustable speed heat pump and power system scheme for a lunar based habitat  

SciTech Connect

A high reliability power system scheme, incorporating a photovoltaic power supply and adjustable speed heat pump for life support is presented in this paper. Initial design guidelines and also a description of the state of technology available is presented herein. The power supply scheme will be used as input to an Adjustable Speed Drive (ASD) which will be driving a heat pump. A brief study of various aspects of ASDs is presented, further a summary of the relative merits of different ASD systems presently in vogue is discussed. The advantages of using microcomputer based ASDs is widely understood and accepted. Of the three most popular drive systems, namely the Induction Motor Drive, Switched Reluctance Motor Drive and Brushless DC Motor Drive, any one may be chosen. The choice would depend on the nature of the application and its requirements. The suitability of the above mentioned drive systems and control techniques for a photovoltaic array driven ASD for an aerospace application are discussed. Also discussed are several possible power system designs for a potential lunar habitat.

Domijan, A. Jr.; Buchh, T.A. [Univ. of Florida, Gainesville, FL (United States). Dept. of Electrical and Computer Engineering] [Univ. of Florida, Gainesville, FL (United States). Dept. of Electrical and Computer Engineering

1998-12-01T23:59:59.000Z

49

Potassium Rankine cycle nuclear power systems for spacecraft and lunar-mass surface power  

SciTech Connect

The potassium Rankine cycle has high potential for application to nuclear power systems for spacecraft and surface power on the moon and Mars. A substantial effort on the development of Rankine cycle space power systems was carried out in the 1960`s. That effort is summarized and the status of the technology today is presented. Space power systems coupling Rankine cycle power conversion to both the SP-100 reactor and thermionic reactors as a combined power cycle are described in the paper.

Holcomb, R.S.

1992-07-01T23:59:59.000Z

50

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

E-Print Network (OSTI)

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

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

2003-01-01T23:59:59.000Z

51

Wireless multimedia sensor and actor networks for the next generation power grid  

Science Journals Connector (OSTI)

Electrical power grid is undergoing a major renovation, to meet the power quality and power availability demands of the 21st century. The new power grid, which is also called as the smart grid, aims to integrate the recent technological advancements ... Keywords: Electrical power grid, Smart grid, Wireless multimedia sensor and actor network

Melike Erol-Kantarci; Hussein T. Mouftah

2011-06-01T23:59:59.000Z

52

Using Variable-Range Transmission Power Control in Wireless Ad Hoc Networks  

E-Print Network (OSTI)

Using Variable-Range Transmission Power Control in Wireless Ad Hoc Networks Javier Gomez and Andrew networks such as ad hoc and sensor networks. First, using previous work by Steele [18], we show that in this paper highlight the need to design future MAC and routing protocols for wireless ad hoc and sensor

Gomez-Castellanos, Javier

53

Delay Bounded Rate and Power Control in Energy Harvesting Wireless Networks  

E-Print Network (OSTI)

in environmentally powered wireless networks with bursty packet arrivals. Varying the size of the energy storage unit such as solar energy, mechanical energy and thermal energy have started finding use in wireless sensor networks, followed by an energy storage unit. The energy harvested by the front end is stored in the storage unit

Rajan, Dinesh

54

RF-Powered Variable Duty Cycle Wireless Sensor Daniel Costinett, Erez Falkenstein, Regan Zane, Zoya Popovic  

E-Print Network (OSTI)

is monitored, and the duty cycle for wireless data transmission adaptively adjusted through use of a low-power with optimizing the interface between the power reception device, and typical low-power sensor loads to achieve presents an optimal DC load to the energy storage device, which provides power to the microcontroller

Popovic, Zoya

55

Relay-Enabled Hybrid Wireless and Powerline Communication Access Network for Smart Power Grid  

Science Journals Connector (OSTI)

As the main approach to realize intelligent electric distribution, the power line communication (PLC) technology still faces the problem of topology complexity in this field. In this article, a Hybrid Wireless–PL...

Huifeng Bai; Mingwei Li; Dongshan Wang…

2014-01-01T23:59:59.000Z

56

Mobile power management for maximum battery life in wireless communication networks  

Science Journals Connector (OSTI)

We address the problem of how a mobile node in a wireless network should vary its transmitter power so that energy consumption is minimized, subject to fixed quality-of-service constraints. Optimal solutions are obtained for channels with stationary, ...

John M. Rulnick; Nicholas Bambos

1996-03-01T23:59:59.000Z

57

A SIMULATION MODEL FOR STREAMING APPLICATIONS OVER A POWER-MANAGEABLE WIRELESS LINK  

E-Print Network (OSTI)

A SIMULATION MODEL FOR STREAMING APPLICATIONS OVER A POWER-MANAGEABLE WIRELESS LINK Andrea-validated simulation model for the exploration of real-time multimedia systems, where system components are modeled

Bogliolo, Alessandro

58

Embedding damage detection algorithms in a wireless sensing unit for operational power  

Science Journals Connector (OSTI)

A low-cost wireless sensing unit is designed and fabricated for deployment as the building block of wireless structural health monitoring systems. Finite operational lives of portable power supplies, such as batteries, necessitate optimization of the wireless sensing unit design to attain overall energy efficiency. This is in conflict with the need for wireless radios that have far-reaching communication ranges that require significant amounts of power. As a result, a penalty is incurred by transmitting raw time-history records using scarce system resources such as battery power and bandwidth. Alternatively, a computational core that can accommodate local processing of data is designed and implemented in the wireless sensing unit. The role of the computational core is to perform interrogation tasks of collected raw time-history data and to transmit via the wireless channel the analysis results rather than time-history records. To illustrate the ability of the computational core to execute such embedded engineering analyses, a two-tiered time-series damage detection algorithm is implemented as an example. Using a lumped-mass laboratory structure, local execution of the embedded damage detection method is shown to save energy by avoiding utilization of the wireless channel to transmit raw time-history data.

Jerome Peter Lynch; Arvind Sundararajan; Kincho H Law; Anne S Kiremidjian; Ed Carryer

2004-01-01T23:59:59.000Z

59

Joint Power Control and Link Scheduling in Wireless Networks for Throughput Optimization  

E-Print Network (OSTI)

Joint Power Control and Link Scheduling in Wireless Networks for Throughput Optimization Liqun Fu formulate the general joint link scheduling and power control problem as an in- teger linear programming optimality. Index Terms--scheduling, power control, SINR constraints. I. INTRODUCTION Due to their unconfined

Huang, Jianwei

60

Energy Efficient Joint Scheduling and Power Control for Wireless Sensor Networks  

E-Print Network (OSTI)

Energy Efficient Joint Scheduling and Power Control for Wireless Sensor Networks Gang Lu in TDMA link scheduling with transmission power control using a realistic SINR-based interference model. We then investigate the scheduling and power control problem with the objective of minimizing

Krishnamachari, Bhaskar

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


61

Robust and Probabilistic Power-aware Scheduling of Wireless Sensor Networks  

E-Print Network (OSTI)

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 to its available power. More importantly, to compensate for the effects of decrease in available power

Egerstedt, Magnus

62

Energy Efficient Greedy Link Scheduling and Power Control in wireless networks  

E-Print Network (OSTI)

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.

Sridharan, Arun

2012-01-01T23:59:59.000Z

63

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 supplied by the sediment-MFC. The MFC developed in this study successfully powered the WSN and results

64

Design and Analysis of Micro-Solar Power Systems for Wireless  

E-Print Network (OSTI)

Design and Analysis of Micro- Solar Power Systems for Wireless Sensor Networks Jaein Jeong UC Berkeley, Computer Science with Xiaofan Jiang and David Culler 11-17-2006 LGE Talk #12;2 Solar Energy in Richmond Field Station Trio Heliomote #12;3 Our Contributions · Model for micro-solar power system

California at Berkeley, University of

65

Asymptotically Optimal Transmission Policies for Large-Scale Low-Power Wireless Sensor Networks  

E-Print Network (OSTI)

Asymptotically Optimal Transmission Policies for Large-Scale Low-Power Wireless Sensor Networks. The objective is to devise joint routing, power control and transmission scheduling policies in order to gather formulate the problem as maximizing the utility of transmissions subject to explicit fairness constraints

Starobinski, David

66

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

E-Print Network (OSTI)

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

Shihada, Basem

67

Power spectral density estimation for wireless fluctuation enhanced gas sensor nodes  

E-Print Network (OSTI)

Fluctuation enhanced sensing (FES) is a promising method to improve the selectivity and sensitivity of semiconductor and nanotechnology gas sensors. Most measurement setups include high cost signal conditioning and data acquisition units as well as intensive data processing. However, there are attempts to reduce the cost and energy consumption of the hardware and to find efficient processing methods for low cost wireless solutions. In our paper we propose highly efficient signal processing methods to analyze the power spectral density of fluctuations. These support the development of ultra-low-power intelligent fluctuation enhanced wireless sensor nodes while several further applications are also possible.

Mingesz, Robert; Gingl, Zoltan

2014-01-01T23:59:59.000Z

68

Powering a wireless temperature sensor using sediment microbial fuel cells with vertical arrangement of electrodes  

Science Journals Connector (OSTI)

The application of wireless sensors is an important approach for monitoring natural water systems in remote locations; however, limited power sources are a key challenge for successful application of these sensors. Sediment microbial fuel cells (SMFCs) have shown potential as a sustainable power source with low maintenance requirements to power wireless sensors. This study examines electricity generation in lab-scale \\{SMFCs\\} with the sediment from Lake Michigan. Two \\{SMFCs\\} are operated in parallel with a difference in cathode arrangement (floating cathode vs. bottom cathode). The data show that the SMFC with a floating cathode produces more electricity and results in a shorter charging time when an ultracapacitor is connected to the circuit. To control electricity delivery and voltage elevation to a value that can drive a wireless temperature sensor, a power management system (PMS) is developed. With the PMS, both \\{SMFCs\\} can consistently power the wireless temperature sensor for data transmission to a computer, although the number of recorded data within the same period differs. This research provides an effective PMS for power control and valuable experience in SMFC configurations for the next onsite test of the developed \\{SMFCs\\} in Lake Michigan.

Fei Zhang; Lei Tian; Zhen He

2011-01-01T23:59:59.000Z

69

Power output enhancement of a vibration-driven electret generator for wireless sensor applications  

Science Journals Connector (OSTI)

We developed a compact vibration-driven electret generator that excelled at a power output. It succeeded in the operation of wireless sensor modules only on electricity from electret generators. This electret generator can supply enough power to operate a wireless sensor module without an external power source. It was necessary for enabling this operation to enhance the power output of the electret generator. We enhanced the power output by decreasing the parasitic capacitance. To decrease the parasitic capacitance, we fabricated a collector substrate using concave electrodes. We decreased it from 25 to 17 pF. As a result, the power output from our generator was enhanced from 40 to 100 µW considerably at an acceleration of 0.15 g (1.47 m s?2) and a resonance frequency of 30 Hz.

Tatsuakira Masaki; Kenji Sakurai; Toru Yokoyama; Masayo Ikuta; Hiroshi Sameshima; Masashi Doi; Tomonori Seki; Masatoshi Oba

2011-01-01T23:59:59.000Z

70

The "Other" Energy in Buildings: Wireless Power Metering of Plug-in  

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

The "Other" Energy in Buildings: Wireless Power Metering of Plug-in The "Other" Energy in Buildings: Wireless Power Metering of Plug-in Devices in Building 90 and Homes Speaker(s): Steven Lanzisera Date: June 17, 2011 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Anita Estner 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. Although these devices have been studied for 30 years, they are not as well understood as the other end-uses due to their great variety and difficulty in collecting representative energy data for them. This talk describes a method for collecting device-level energy use data for these devices using a relatively low-cost wireless mesh networking technology. Over 600 meters were deployed across B90 and three homes to

71

Power Scheduling for Multi-Hop Wireless Networks  

E-Print Network (OSTI)

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 (

Yu, Yuan

2009-01-01T23:59:59.000Z

72

Toward space solar power: Wireless energy transmission experiments past, present and future  

Science Journals Connector (OSTI)

Solar power is a reality. Today increasing numbers of photovoltaic and other solar-powered installations are in service around the world and in space. These uses range from the primary electric power source for satellites remote site scientific experiments and villages in developing countries to augmenting the commercial electric grid and providing partial power for individual businesses and homeowners in developed countries. In space electricity generated by photovoltaic conversion of solar energy is the mainstay of power for low Earth and geostationary satellite constellations. Still for all its acceptance as a benign and environmentally friendly energy source terrestrial solar power has yet to be seriously considered a viable technology for providing base electrical generating capacity. The obvious reason is sunshine on Earth is too unreliable. In addition to the diurnal and seasonal cycles inclement weather reduces the average daily period and intensity of insolation. However the Sun shines constantly in space. The challenge is to harvest and transmit the energy from space to Earth. The concept of space solar power based on microwave wireless energy transmission was first put forth more than 25 years ago by Dr. Peter Glaser. We review historical experiments in wireless energy transmission which have brought the technology from a laboratory curiosity to its present status. Results from recent experiments and their implications for wireless energy transmission as an enabling technology for space solar power are reviewed. Current developments are discussed along with proposed terrestrial and space experiments.

Frank E. Little; James O. McSpadden; Kai Chang; Nobuyuki Kaya

1998-01-01T23:59:59.000Z

73

How Wireless Power Charging Technology Affects Sensor Network Deployment and Routing  

E-Print Network (OSTI)

of environmental energy such as sunlight and acoustic vibra- tions [6]­[9]. However, the energy that a solar cell with a large solar cell; the low harvesting efficiency of small solar cells, together with uncontrollableHow Wireless Power Charging Technology Affects Sensor Network Deployment and Routing Bin Tong, Zi

Wang, Guiling

74

Dynamic Rate and Power Allocation in Wireless Ad Hoc Networks with Elastic and Inelastic Traffic  

Science Journals Connector (OSTI)

In this paper, we focus on the problem of dynamic rate and power allocation in wireless ad hoc networks with slow-fading channels, where a mixture of elastic and inelastic traffic is supported. A stochastic optimization problem incorporating the quality ... Keywords: Dynamic resource allocation, Elastic flows, Inelastic flows, Particle swarm optimization (PSO), QoS requirements, Stochastic duality theory

Fei Wang; Xiaofeng Liao; Songtao Guo; Hongyu Huang; Tingwen Huang

2013-05-01T23:59:59.000Z

75

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

E-Print Network (OSTI)

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

Srikant, Rayadurgam

76

Multi-hop wireless charging optimization in Low-Power Networks  

E-Print Network (OSTI)

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

Boyer, Edmond

77

Minimum Power Assignment in Wireless Ad Hoc Networks with Spanner Property  

E-Print Network (OSTI)

be tested in polynomial time and is monotone [1], to minimize the maximum assigned power. We also give, they communicate through multi-hop wireless links by using intermediate nodes to relay the message. Larger distance uv . In other words, wuv > wxy if uv > xy and wuv = wxy if uv = xy . For example

Li, Xiang-Yang

78

Minimum Power Assignment in Wireless Ad Hoc Networks with Spanner Property  

E-Print Network (OSTI)

be tested in polynomial time, to minimize the maximum assigned power. We also give polynomial time through multi-hop wireless links by using intermediate nodes to relay the message. Generally, nodes nodes u and v is a monotone increasing function of the Euclidean #12;distance uv . In other words, wuv

Li, Xiang-Yang

79

ENERGY-EFFICIENT GEOGRAPHIC ROUTING IN ENVIRONMENTALLY POWERED WIRELESS SENSOR NETWORKS  

E-Print Network (OSTI)

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

Hou, Y. Thomas

80

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

E-Print Network (OSTI)

technologies and currently untapped sources. Power sources are classified as energy reservoirs, power (i.e. a wire), scavenge available ambient power at the node (i.e. a solar cell). Power sources types of power source technologies is difficult. For example, comparing the efficiency of a solar cell

Frechette, Luc G.

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


81

Low Power Body Sensor Network for Wireless ECG Based on Relaying of Creeping Waves at 2.4GHz1  

E-Print Network (OSTI)

Low Power Body Sensor Network for Wireless ECG Based on Relaying of Creeping Waves at 2.4GHz1 Engineering Rochester Institute of Technology Abstract- A wireless communication platform for ECG operating applications that demand higher data rates than ECG.1 I. INTRODUCTION The Electrocardiogram (ECG) [1

Tsouri, Gill

82

Wireless power transfer for scaled electronic biomedical implants  

E-Print Network (OSTI)

Bandaru, "Enhanced Electromagnetic Interference Shieldingof avoiding electromagnetic interference. Power can be

Theilmann, Paul Thomas

2012-01-01T23:59:59.000Z

83

A study of low level vibrations as a power source for wireless sensor nodes  

Science Journals Connector (OSTI)

Advances in low power VLSI design, along with the potentially low duty cycle of wireless sensor nodes open up the possibility of powering small wireless computing devices from scavenged ambient power. A broad review of potential power scavenging technologies and conventional energy sources is first presented. Low-level vibrations occurring in common household and office environments as a potential power source are studied in depth. The goal of this paper is not to suggest that the conversion of vibrations is the best or most versatile method to scavenge ambient power, but to study its potential as a viable power source for applications where vibrations are present. Different conversion mechanisms are investigated and evaluated leading to specific optimized designs for both capacitive MicroElectroMechancial Systems (MEMS) and piezoelectric converters. Simulations show that the potential power density from piezoelectric conversion is significantly higher. Experiments using an off-the-shelf PZT piezoelectric bimorph verify the accuracy of the models for piezoelectric converters. A power density of 70 ?W/cm3 has been demonstrated with the PZT bimorph. Simulations show that an optimized design would be capable of 250 ?W/cm3 from a vibration source with an acceleration amplitude of 2.5 m/s2 at 120 Hz.

Shad Roundy; Paul K. Wright; Jan Rabaey

2003-01-01T23:59:59.000Z

84

Optimization of Power Consumption for Wireless Sensor Networks  

Science Journals Connector (OSTI)

Transmission using excess power not only shortens the lifetime of sensor nodes, but also introduces interference. Packets should ideally be transmitted with moderate power. This work proposes a multi-level pow...

Sheng-Tzong Cheng; Jia-Shing Shih

2012-01-01T23:59:59.000Z

85

Powering Wireless Sensor Nodes with Ambient Temperature Changes  

E-Print Network (OSTI)

.25 ambient temperature change. Author Keywords Sensing, Thermal energy harvesting, battery-free sensors. ACM to consider power harvesting as a potential solution. In this paper, we present a thermal power harvester in battery technology. Power harvesting provides an alternative solution for developing sensors that can last

Manchak, John

86

An ultrasound technique for wireless power transmission through tissue to implanted medical devices  

Science Journals Connector (OSTI)

An ultrasound electrical recharging system (USERTM) is developed and tested which wirelessly transmits significant amount of energy through animal tissue to charge implantable devices batteries or capacitors. The goal of this approach is wireless power transmission to active human implant devices. Experiments with transducers with resonant frequencies between 0.5 and 3.5 MHz led us to adopt 0.75 to 1.25 MHz as the range of optimum efficiency. In vitro experiments demonstrated significant charging of 4.1 V medically qualified Li-ion batteries across tissue depths of up to 5 cm. Charging currents close to 300 mA were achieved in vitro. Several in vivo tests confirmed the power delivery in a porcine model. In an in vivo survival test tissue was exposed to 1 MHz ultrasound at an average intensity of 0.4 W/cm2 for 11.5 h. Histology of the exposed tissue showed tissue changes primarily attributable only to surgical implantation of the prototype device. Many traditional and developing implanted medical devices are targets for the introduction of this method of power delivery to reduce the number of battery replacement operations and improve performance compared to the existing electromagnetic method of wireless power delivery. [Work supported by the NIH/NIBIB R44EB007421.

Leon Radziemski

2013-01-01T23:59:59.000Z

87

DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS  

SciTech Connect

The development work during this quarter was focused in the assembly of the downhole power generator hardware and its electronics module. The quarter was also spent in the development of the surface system electronics and software to extract the acoustic data transmitted from downhole to the surface from the noise generated by hydrocarbon flow in wells and to amplify very small acoustic signals to increase the distance between the downhole tool and the surface receiver. The tasks accomplished during this report period were: (1) Assembly of the downhole power generator mandrel for generation of electrical power due to flow in the wellbore. (2) Test the piezoelectric wafers to assure that they are performing properly prior to integrating them to the mechanical power generator mandrel. (3) Coat the power generator wafers to prevent water from shorting the power generator wafers. (4) Test of the power generator using a water tower and an electric pump to create a water flow loop. (5) Test the power harvesting electronics module. (6) Upgrade the signal condition and amplification from downhole into the surface system. (7) Upgrade the surface processing system capability to process data faster. (8) Create a new filtering technique to extract the signal from noise after the data from downhole is received at the surface system.

Paul Tubel

2004-02-01T23:59:59.000Z

88

Wireless Electrical Power to Sub-millimeter Robots  

Science Journals Connector (OSTI)

A sub-millimeter scale coil is investigated as an alternative means to power electronics for small-scale robots. The AC voltage is induced by time-varying magnetic field. FEM analysis of employing magnetic fie...

Robert A. Nawrocki; Dominic R. Frutiger…

2012-01-01T23:59:59.000Z

89

A comparison of radioisotope Brayton and Stirling system for lunar surface mobile power  

Science Journals Connector (OSTI)

A study was performed by the Rocketdyne Division of Rockwell 2.5?kWe modular dynamic isotope power system (DIPS) using a Stirling power conversion system. The results of this study were compared with similar results performed under the DIPS program using a Brayton power conversion system. The study indicated that the Stirling power module has 20% lower mass and 40% lower radiator area than the Brayton module. However the study also revealed that because the Stirling power module requires a complex heat pipe arrangment to transport heat from the isotope to the Stirling heater head and a pumped NaK heat rejection loop the Stirling module is much more difficult to integrate with the isotope heat source and heat rejection system.

Richard B. Harty

1991-01-01T23:59:59.000Z

90

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

SciTech Connect

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.

Onar, Omer C [ORNL] [ORNL; Tang, Lixin [ORNL] [ORNL; Chinthavali, Madhu Sudhan [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Miller (JNJ), John M. [JNJ-Miller PLC] [JNJ-Miller PLC

2014-01-01T23:59:59.000Z

91

Microsoft PowerPoint - Wireless, Passive Ceramic Strain Sensors_An [Compatibility Mode]  

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

June 13, 2013 June 13, 2013 Wireless, Passive Ceramic Strain Sensors for Turbine Engine Applications Gang Shao and Linan An Advanced Materials Processing and Analysis Center (AMPAC) Department of Materials Science and Engineering (MSE) University of Central Florida Orlando, FL 32816 2 Outline  Motivation  Strain Sensors - State of the Art  Objectives  Schedule and timelines  Accomplishment  Future Work  Summary 3 Motivation - applications of turbines  Turbine engines - key for energy generation and propulsion 2007 Energy Generation Statistics (DOE) ~50% Major power generation techniques need turbine engines 4 Motivation - need for wireless strain sensors  Many parts in turbine engines subjected to severe strain/stress in extreme environments  Strain sensors

92

Efficient Power Control for Broadcast in Wireless Communication Systems  

E-Print Network (OSTI)

we focus on the determination of minimum-energy broadcast tree construction taking into consideration- proaches (Section 3), Minimum energy broadcast tree (Section 4), Broadcast incremental power (BIP) with SIR Department of Electrical Engineering, University of Texas at San Antonio, San Antonio, TX 78249 Email

Chronopoulos, Anthony T.

93

Efficient Low Complexity Power Allocation Policies for Wireless Communication Systems  

E-Print Network (OSTI)

QoS Satya Kumar V, Vinod Sharma Department of Electrical Communications Engineering, Indian Institute. Other benefits will be smaller diesel generators and batteries with longer life time. Thus, one or satisfy mean delay constraints when power is a linear/general function of rate. In [13] existence

Sharma, Vinod

94

1 Comparison of Data-driven Link Estimation Methods in Low-power Wireless Networks  

E-Print Network (OSTI)

Abstract—Link estimation is a basic element of routing in low-power wireless networks, and data-driven link estimation using unicast MAC feedback has been shown to outperform broadcast-beacon based link estimation. Nonetheless, little is known about how different data-driven link estimation methods affect routing behaviors. To address this issue, we classify existing data-driven link estimation methods into two broad categories: L-NT that uses aggregate information about unicast and L-ETX that uses information about the individual unicast-physical transmissions. Through mathematical analysis and experimental measurement in a testbed of 98 XSM motes (an enhanced version of MICA2 motes), we examine the accuracy and stability of L-NT and L-ETX in estimating the ETX routing metric. We also experimentally study the routing performance of L-NT and L-ETX. We discover that these two representative, seemingly similar methods of data-driven link estimation differ significantly in routing behaviors: L-ETX is much more accurate and stable than L-NT in estimating the ETX metric, and, accordingly, L-ETX achieves a higher data delivery reliability and energy efficiency than L-NT (for instance, by 25.18 % and a factor of 3.75 respectively in our testbed). These findings provide new insight into the subtle design issues in data-driven link estimation that significantly impact the reliability, stability, and efficiency of wireless routing, thus shedding light on how to design link estimation methods for mission-critical wireless networks which pose stringent requirements on reliability and predictability. Index Terms—Low-power wireless networks, sensor networks, link estimation and routing, data-driven, beacon-based, distancevector routing, geographic routing I.

Hongwei Zhang; Lifeng Sang; Student Member; Anish Arora

95

PER-NODE POWER MINIMAL MULTICAST TREES WHICH MAXIMIZE THE TIME-TO-FIRST-FAILURE IN ENERGY CONSTRAINED STATIC WIRELESS  

E-Print Network (OSTI)

PER-NODE POWER MINIMAL MULTICAST TREES WHICH MAXIMIZE THE TIME-TO-FIRST-FAILURE IN ENERGY as the time till the first node in the network runs out of battery energy, and minimizing the total power in energy constrained static wireless networks. It is shown in [6] that simply optimizing the TTFF criterion

Arabshahi, Payman

96

Joint Routing, Scheduling And Power Control For Multihop Wireless Networks With Multiple Antennas  

E-Print Network (OSTI)

We consider the problem of Joint Routing, Scheduling and Power-control (JRSP) problem for multihop wireless networks (MHWN) with multiple antennas. We extend the problem and a (sub-optimal) heuristic solution method for JRSP in MHWN with single antennas. We present an iterative scheme to calculate link capacities(achievable rates) in the interference environment of the network using SINR model. We then present the algorithm for solving the JRSP problem. This completes a feasible system model for MHWN when nodes have multiple antennas. We show that the gain we achieve by using multiple antennas in the network is linear both in optimal performance as well as heuristic algorithmic performance.

Vangala, Harish; Sharma, Prof Vinod

2011-01-01T23:59:59.000Z

97

SWAP Project: Beyond the State of the Art on Harvested Energy-Powered Wireless Sensors  

E-Print Network (OSTI)

-efficient paradigm of wireless sensor networks with the self-sustainable capabilities of harvesting systems. SWAP

Rossi, Michele

98

Biocompatible wireless power transferring and charging based on ultrasonic resonance devices  

Science Journals Connector (OSTI)

To increase application area of implantable devices for medical treatment including implantable cardiac defibrillator or deep brain stimulator the rechargeable battery module is highly requested. The previous Li-type battery has limited current sources so that the patient is forced to have surgery just for changing battery. Previous technologies such as magnetic resonance and induction coupling have limited applications because of its short transfer distance compared to device size and magnetic field intensity limitation for the safety of body exposure. As an alternative the biocompatible wireless power transferring and charging technology is proposed using ultrasonic resonance devices. For the high efficient power transferring optimal transfer frequency is calculated based on the acoustic radiation and damping effect. Then the optimal load resistance is selected for matching power condition in receiver. And transmitter is designed to match the optimal transfer frequency. The ultrasonic resonance transmitter and receiver are manufactured with the size of 20 mm diameter 6.0 mm height. The energy conversion efficiency from input electrical power of transmitter and output power of receiver is about 25.6% at 10 cm distance experimentally. The maximum transferring power is up to 15 mW. This result is quite high considered with the device size and the power transfer distance.

2013-01-01T23:59:59.000Z

99

Weak many vs. strong few: reducing BER through packet duplication in power-budgeted wireless connections  

Science Journals Connector (OSTI)

In this paper, we present new energy-aware techniques to lower the packet-level error rates of application-layer connections in wireless ad hoc networks. We consider a model in which each connection is allocated a fixed power budget, and ask: Is it better to use this power budget to send many duplicate packets (at lower power) or fewer packets (at high power)? We consider a scheme in which each application-layer connection is implemented at the physical level by an overlay network consisting of multiple parallel multi-hop paths. Data packets submitted at the connection source are checksummed and replicated. The destination delivers the first error-free copy of each packet, in order, dropping packets that are corrupt or duplicate. We compare our scheme with the traditional scheme in which the source transmits precisely one packet to the destination along a single minimum-hop path. We show that even when both schemes are constrained by identical power consumption bounds, our scheme can use duplication to attain significantly lower packet-level error rates in many common situations. We describe the relationship between packet error rate, the extent of duplication and the path lengths and show that the qualitative nature of the relationships change significantly, depending on available power budget.

Ghassen Ben Brahim; Bilal Khan; Ala Al-Fuqaha; Mohsen Guizani

2008-01-01T23:59:59.000Z

100

A SiC MOSFET Based Inverter for Wireless Power Transfer Applications  

SciTech Connect

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.

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

2014-01-01T23:59:59.000Z

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


101

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

E-Print Network (OSTI)

1308 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 6, NO. 4, APRIL 2007 Battery Power batteries, energy efficiency is a critical factor in wire- less sensor networks (WSNs). Orthogonal modulations appro- priate for the energy-limited WSN setup have been investigated under the assumption

Giannakis, Georgios

102

Integrated All-silicon Thin-film Power Electronics on Flexible Sheets For Ubiquitous Wireless Charging Stations based on Solar-energy Harvesting  

E-Print Network (OSTI)

into wireless charging stations. In this work, we combine the thin-film circuits with flexible solar cellsIntegrated All-silicon Thin-film Power Electronics on Flexible Sheets For Ubiquitous Wireless Charging Stations based on Solar-energy Harvesting Liechao Huang, Warren Rieutort-Louis, Yingzhe Hu, Josue

103

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

SciTech Connect

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.

Susan Burkett; Hagen Schempf

2006-01-31T23:59:59.000Z

104

Smart power monitoring utility system using wireless sensor networks : a project report submitted in partial fulfilment of the requirements for the degree of Master of Engineering in Electronics and Electrical Engineering.  

E-Print Network (OSTI)

??The design and development of a Wireless Sensor Networks based Smart Grid for home utility system for power utility has been presented in this thesis.… (more)

Gill, Satinder Pal Singh

2013-01-01T23:59:59.000Z

105

Video transmission over wireless networks  

E-Print Network (OSTI)

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

Zhao, Shengjie

2005-08-29T23:59:59.000Z

106

Sensors and Actuators B 102 (2004) 2734 A miniaturized low-power wireless remote environmental  

E-Print Network (OSTI)

-site monitoring of water pollution by heavy-metal ions. The system is composed of three parts: an electrochemical wireless remote environmental monitoring sys- tem. This system monitors water pollution of heavy-metal ions sensor module using microfabricated electrodes for detecting heavy-metal contamination in sample water

Kwak, Juhyoun

107

Wireless@Virginia Tech Telecommunications  

E-Print Network (OSTI)

Wireless@Virginia Tech SWIM VLSI for Telecommunications The Institute for Critical Technology a broad research framework for low power VLSI design. Broad knowledge and ample experience of Wireless@Virginia Tech in wireless system design is a distinctive advantage of the Center, which can be exploited for low

Beex, A. A. "Louis"

108

Microsoft Word - 20110321_LTI_PPM_Tetra Tech_Cost Effective Wireless Application in Power Generation Markets.docx  

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

11/1483 11/1483 Cost-Effective Wireless Application in the Power Generation Market 21 March, 2011 Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe on privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or

109

Lunar Viscosity Models  

Science Journals Connector (OSTI)

31 March 1977 research-article Lunar Viscosity Models R. Meissner Viscosity values as estimated from isostatic processes and...depth seem to be connected with a limited range of viscosity values. A tentative relation between viscosity...

1977-01-01T23:59:59.000Z

110

Recent lunar magnetism  

E-Print Network (OSTI)

The magnetization of young lunar samples (magnetic fields (e.g. core dynamo and long-lived impact plasma fields) have not been present within the last 1.5 Ga. To better ...

Buz, Jennifer

2011-01-01T23:59:59.000Z

111

Resource management in heterogeneous wireless sensor networks  

E-Print Network (OSTI)

A. , 2002: Joint scheduling and power control for wirelesstransmit power control while scheduling wireless nodes ina control packet which contains the scheduling information

Regini, Edoardo

2009-01-01T23:59:59.000Z

112

New Technique Provides Energy Wirelessly  

Science Journals Connector (OSTI)

Topics include a new technology for fast personal-area networks; an innovative antiphishing approach; a wireless system for powering and charging devices; and a wall that users could touch to control lights, appliances, and other items in a room. Keywords: IEEE 802.15.3c-2009, wireless personal area networks, WPANs, phishing, antiphishing, Phishgig, WiTricity, wireless power, MIT, Living Wall, conductive paint, sensors

Linda Dailey Paulson

2010-04-01T23:59:59.000Z

113

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

SciTech Connect

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

Carnegie Mellon University

2008-09-30T23:59:59.000Z

114

Reducing Power Consumption in Wireless Sensor Networks Using a Novel Approach to Data Aggregation  

Science Journals Connector (OSTI)

......low duty cycle operation. These protocols...TinyOS operating system [15]. B-MAC...activity using a low power listening. If...query processing system for sensor networks...intersection. In: Handbook of Multisensor...Versatile low power media access for...Networked Sensor Systems, November 3-5......

Silvio Croce; Francesco Marcelloni; Massimo Vecchio

2008-03-01T23:59:59.000Z

115

Reducing Power Consumption in Wireless Sensor Networks Using a Novel Approach to Data Aggregation  

Science Journals Connector (OSTI)

......Each sensor node is a tiny device composed of three basic units...activity using a low power listening. If the channel is not active...and transmitting messages, listening the radio channel and sleeping...channel adopts a low-power listening (LPL) approach. Figure-2......

Silvio Croce; Francesco Marcelloni; Massimo Vecchio

2008-03-01T23:59:59.000Z

116

An ultra low power ADC for wireless micro-sensor applications  

E-Print Network (OSTI)

Autonomous micro-sensor nodes rely on low-power circuits to enable energy harvesting as a means of sustaining long-term, maintenance free operation. This work pursues the design of an ultra low-power analog-to-digital ...

Verma, Naveen

2005-01-01T23:59:59.000Z

117

POWER EFFICIENT H.263 VIDEO TRANSMISSION OVER WIRELESS CHANNELS Xiaoan Lu, Yao Wang, and Elza Erkip  

E-Print Network (OSTI)

the power consumption of the H.263 encoder, the Reed-Solomon chan- nel encoder and the transmitter] and the Reed-Solomon (RS) channel codec. The channel is characterized by a two-state Markov model [6]. We focus methodology also H.263 Video Encoder Channel Encoder Markov Channel Channel Decoder H.263 Video Decoder INTRA

Erkip, Elza

118

A MAC Protocol for Wireless Ad Hoc Networks with Power Control  

E-Print Network (OSTI)

is an important factor in ad hoc networks. One way to conserve energy supported by the standard [1] is the power-hop neighborhood. Through many simulations we show that our algorithm outperforms the IEEE 802.11 standard, also IEEE 802.11 [1] has become the standard for Wire- less LAN's both in infrastructure and in ad hoc mode

119

Challenges on Low-Power Platform Design for Real-World Wireless Sensing Applications  

E-Print Network (OSTI)

Center for Embedded Computer Systems University of California, Irvine, CA 92697-2625, USA Abstract-- Real to miniaturize. The battery, as the primary power supply, limits not only the energy capacity but also batteries, solar panels, and energy storage. The platform as a whole will operate even more efficiently

Chou, Pai H.

120

An Architecture for Power-Saving Communications in a Wireless Mobile Ad Hoc Network  

E-Print Network (OSTI)

of energy-conserving communications. In comparison, existing protocols only exploit location information of mobile hosts to achieve the goal of energy conservation. The architecture addresses the power- saving. In comparison, existing protocols only exploit location information in limited layers. Similar to cellular

Tseng, Yu-Chee

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


121

Optimal Power Management in Wireless Control Systems Konstantinos Gatsis, Alejandro Ribeiro and George J. Pappas  

E-Print Network (OSTI)

but a separation principle for finite horizon costs can be established [11], and optimal plant and transmission the sensor. The power allocated to these transmissions determines the probability of successful reception of transmissions protected with capacity achieving codes, conventional event-triggered policies are recovered

Pappas, George J.

122

UNIVERSITY OF CALIFORNIA, SAN DIEGO A Low-Cost, Low-Power, Wireless Occupancy Sensing Platform  

E-Print Network (OSTI)

of smart buildings is energy conservation. The US Department of Energy estimates that buildings account . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.4 Power Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.5 Future Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 ii #12;LIST OF FIGURES Figure 1: End use of electricity in US buildings. Source: US DOE [4

123

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)

source which will enable the sensors to be employed in autonomous condition monitoring and wireless data required for these devices and ability to be surreptitiously deployed in hostile and inaccessible

Fisher, Frank

124

The Intermediate Outpost -An Alternate Concept for Human Lunar Exploration  

E-Print Network (OSTI)

to be developed for LSAM or CEV3 , solar panels for power generation and batteries for eclipse power generation capacity of the lunar lander. * Graduate Research Assistant, AIAA Student Member. Graduate Research & Exposition 18 - 20 September 2007, Long Beach, California AIAA 2007-6274 Cop

de Weck, Olivier L.

125

CCEC Seminar Wireless Sensors for SemiconductorWireless Sensors for Semiconductor  

E-Print Network (OSTI)

CCEC Seminar Wireless Sensors for SemiconductorWireless Sensors for Semiconductor Manufacturing perhaps. In this talk, we describe our efforts in developing a new class of wireless sensors for use in semiconductor manufacturing. These sensors are fully self-contained with on board power, communications

Akhmedov, Azer

126

subject: Apollo 17 Lunar Surface Experiments '~su:mma'ry""" "'case 4oo5 s  

E-Print Network (OSTI)

of the lunar surface experiment package. The C/S distributes power generated by a Radioisotope Thermoelectric Generator to the experiments and subsystems. The C/S consists of the communication subsystem trans- mitters

Rathbun, Julie A.

127

E-Print Network 3.0 - architecture team-lunar scenario Sample...  

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

Search Powered by Explorit Topic List Advanced Search Sample search results for: architecture team-lunar scenario Page: << < 1 2 3 4 5 > >> 1 The goal of software architecture...

128

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

E-Print Network (OSTI)

As the cost of wireless devices approaches zero, it becomes more feasible to replace wires with wireless communication. Vehicle wiring harnesses are traditionally wired to communicate both power and information simultaneously, resulting in separate...

Hoelscher, David Louis

2009-05-15T23:59:59.000Z

129

Wireless sensor networks and environmental monitoring applications  

E-Print Network (OSTI)

Radio: 4kbps, 180m Sensors: Light and accelerometer Energy: Solar powered Golem and deputy dust 16mm3-aided medicine Data processing in wireless sensor networks Facilities: Cluster of 16 computers 30 ultra low power wireless sensors Lego robotics lab (10 Mindstorms kits) More to come... (mobile robot, Mindstorms NXT kits

Le Borgne, Yann-Aël

130

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

E-Print Network (OSTI)

with continuously powering an RFID tag was the scarce output power. The palm-sized solar cell array that was stacked of the 2 numbers showed that while it was not possible to continuously power the tag with the solar cell.1. The power source of the tag comprised of an array of Solar Cells configured to give out an open

Tentzeris, Manos

131

3484 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 12, NO. 7, JULY 2013 Joint Back-Pressure Power Control and Interference  

E-Print Network (OSTI)

Gopalakrishnan and Nicholas D. Sidiropoulos, Fellow, IEEE Abstract--Back-Pressure Power Control (BPPC) is a cross control and interference cancellation are tightly coupled. This leads to a joint Back- Pressure Power, back- pressure, power control, interference cancellation, NP-hard, con- vex approximation. I

Sidiropoulos, Nikolaos D.

132

Brief Contributions________________________________________________________________________________ Topology Control of Ad Hoc Wireless  

E-Print Network (OSTI)

________________________________________________________________________________ Topology Control of Ad Hoc Wireless Networks for Energy Efficiency Maggie X. Cheng, Member, IEEE, Mihaela, Yinfeng Xu, and Ding-Zhu Du Abstract--In ad hoc wireless networks, to compute the transmission power-complete problem. In this paper, we consider the approximated solutions for the MENC problem in ad hoc wireless

Wang, Lusheng

133

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

E-Print Network (OSTI)

was the scarce output power available from sunlight. The palm-sized solar cell array was capable of generating to continuously power the tag with the solar cell array, in a relatively short period of time enough solar energy of Solar Cells configured to give out an open circuit voltage and current above a certain minimum value

Tentzeris, Manos

134

Secure wireless communication platform for EV-to-Grid research  

Science Journals Connector (OSTI)

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

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

2010-06-01T23:59:59.000Z

135

Explanation of Transient Lunar Phenomena based on Lunar Samples Studies  

Science Journals Connector (OSTI)

... that TLPs are changes in albedo caused by dust movement or fluidization we arranged a roughened lunar dust layer on the horizontal surface of a small cup. This was mounted ... new level which can be as much as 100% above that of the static, roughened surface. The effect shows a strong dependence on viewing angle, being a maximum for ...

G. F. J. GARLICK; G. A. STEIGMANN; W. E. LAMB

1972-01-07T23:59:59.000Z

136

Space Plasmas and Lunar Electrodynamics  

E-Print Network (OSTI)

and receiver 10 Gbit/s fibre connection 3-channel digital sensors Time stamping tripole antennas and Data of · Solar atmosphere dynamics including coronal mass ejections (CMEs) · Solar wind ion-acoustic turbulence · Transition layers in the magnetosphere · The lunar regolith · Solar system objects, including planets

137

On-Demand Based Wireless Resources Trading for Green Communications  

E-Print Network (OSTI)

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 ...

Cheng, Wenchi; Zhang, Hailin; Wang, Qiang

2011-01-01T23:59:59.000Z

138

Review: Wireless Internet Handbook  

Science Journals Connector (OSTI)

......Review: Wireless Internet Handbook Reviewed by Harry Agius Wireless Internet Handbook Borko Furht, Mohammad Ilyas...the book. In fairness it does improve after the fifth chapter...Wireless Internet Handbook Borko Furht, Mohammad Ilyas......

Harry Agius

2004-07-01T23:59:59.000Z

139

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

E-Print Network (OSTI)

. ..................................................................................... 50 Fig. 28. (a) Half-wave rectifier with capacitor and (b) its waveforms ............................ 52 Fig. 29. Diode current-voltage characteristic curves with the incident fundamental and diode junction voltage waveforms... and 1930?s. In the 1950?s, the development of high power and efficiency micrwave tube by Raytheon Company [18] opened the modern WPT era. The first rectenna was invented in the 1960?s by combining a half-wave dipole antenna and a single diode by W...

Ahn, Chi Hyung

2011-10-21T23:59:59.000Z

140

A review of wireless and PLC propagation channel characteristics for smart grid environments  

Science Journals Connector (OSTI)

Wireless, power line communication (PLC), fiber optic, Ethernet, and so forth are among the communication technologies on which smart grid communication infrastructure is envisioned to be built. Among these, wireless and PLC-based solutions are attractive ...

Sabih Güzelgöz; Hüseyin Arslan; Arif Islam; Alexander Domijan

2011-01-01T23:59:59.000Z

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


141

Benefit of Lunar Regolith on Reflector Mass Savings  

SciTech Connect

The 2004 NASA Vision for Space Exploration calls for the return of mankind to the moon by no later than 2020, in preparation for an adventure to Mars and beyond. An envisioned lunar outpost will provide living quarters for initially 5- 10 astronauts for up to 2 weeks, and latter for science experiments, and recovery of mineral and indigenous resources for the day-to-day operation and production of propellant. These activities would require electrical and thermal powers in the order of 10's - 100's of kilowatts 24/7. Potential power options include photovoltaic, requiring massive batteries or fuel cells for energy storage during the long nights on the moon, and nuclear reactor power systems, which are much more compact and operate independent of the sun. This paper examines the benefit of using the lunar regolith as a supplemental neutron reflector on decreasing the launch mass of the Sectored Compact Reactor (SCoRe-S), developed at the Institute for Space and Nuclear Power Studies. In addition to providing at least $2.00 of hot-clean excess reactivity at the beginning of life, various SCoRe-S concepts investigated in this paper are at least $1.00 sub-critical when shutdown, and when the bare reactor cores are submerged in wet sand and flooded with seawater, following a launch abort accident. Design calculations performed using MCNP5 confirmed that using lunar regolith as supplementary reflector reduces the launch mass of the SCoRe-S cores by {approx} 34% - 35%, or 150 - 200 kg, while satisfying the above reactivity requirements.

Hatton, Steven A.; El-Genk, Mohamed S. [Institute for Space and Nuclear Power Studies, University of New Mexico, Albuquerque, NM 87131-0001 (United States); Dept. of Chemical and Nuclear Engineering, University of New Mexico, Albuquerque, NM 87131-0001 (United States)

2007-01-30T23:59:59.000Z

142

PowerBeam Inc | Open Energy Information  

Open Energy Info (EERE)

California Zip: CA 94085 Product: PowerBeam holds the patent to a power transmission technology that produces wireless electricity. Coordinates: 32.780338, -96.547405 Show...

143

A Low-Power Mobile Sensing Architecture  

E-Print Network (OSTI)

airborne wireless sensor network of micro-air vehicles. Inairborne wireless sensor network of micro-air vehicles mayplanning for micro-solar power sensor networks. In IPSN ’08:

Dutta, Prabal

2009-01-01T23:59:59.000Z

144

Not all wireless sensor networks are created equal: A comparative study on tunnels  

Science Journals Connector (OSTI)

Wireless sensor networks (WSNs) are envisioned for a number of application scenarios. Nevertheless, the few in-the-field experiences typically focus on the features of a specific system, and rarely report about the characteristics of the target environment, ... Keywords: Wireless sensor networks, link quality, low-power wireless communications, network topologies, topology characterization, tunnel environment

Luca Mottola; Gian Pietro Picco; Matteo Ceriotti; ?tefan Gun?; Amy L. Murphy

2010-08-01T23:59:59.000Z

145

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

E-Print Network (OSTI)

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

Beigl, Michael

146

Dynamic Wireless Power Transfer Feasibility  

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

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

147

Fuel cell systems for first lunar outpost -- Reactant storage options  

SciTech Connect

A Lunar Surface Power Working Group was formed to review candidate systems for providing power to the First Lunar Outpost habitat. The working group met for five days in the fall of 1992 and concluded that the most attractive candidate included a photovoltaic unit, a fuel cell, a regenerator to recycle the reactants, and storage of oxygen and hydrogen gases. Most of the volume (97%) and weight (64%) are taken up by the reactants and their storage tanks. The large volume is difficult to accommodate, and therefore, the working group explored ways of reducing the volume. An alternative approach to providing separate high pressure storage tanks is to use two of the descent stage propellant storage tanks, which would have to be wrapped with graphite fibers to increase their pressure capability. This saves 90% of the volume required for storage of fuel cell reactants. Another approach is to use the descent storage propellant tanks for storage of the fuel cell reactants as cryogenic liquids, but this requires a gas liquefaction system, increases the solar array by 40%, and increases the heat rejection rate by 170% compared with storage of reactants as high pressure gases. For a high power system (>20 kW) the larger energy storage requirement would probably favor the cryogenic storage option.

Nelson, P.A. [Argonne National Lab., IL (United States). Chemical Technology Div.

1995-06-01T23:59:59.000Z

148

Sink repositioning for enhanced performance in wireless sensor networks  

Science Journals Connector (OSTI)

Most of the energy aware routing approaches for unattended wireless sensor networks pursue multi-hop paths in order to minimize the total transmission power. Since almost in all sensor networks data are routed towards a single sink (gateway), hops close ... Keywords: Energy awareness, Real-time data delivery, Sink relocation, Timeliness, Wireless sensor networks

Kemal Akkaya; Mohamed Younis; Meenakshi Bangad

2005-11-01T23:59:59.000Z

149

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

150

Prototype system brings advantages of wireless technology to secure  

National Nuclear Security Administration (NNSA)

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

151

Lunar/Solar effects on Cosmic Rays  

E-Print Network (OSTI)

Lunar/Solar effects on Cosmic Rays By: Sophia Bauer & Jenna Valdez #12;Introduction When cosmic, California." Moon Phase Calendar for Santa Cruz, California. N.p., n.d. Web. 02 Aug. 2012.

California at Santa Cruz, University of

152

Lunar descent using sequential engine shutdown  

E-Print Network (OSTI)

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 ...

Springmann, Philip N

2006-01-01T23:59:59.000Z

153

An Integrated Rectifier/Regulator for a Wireless Battery Charging System.  

E-Print Network (OSTI)

?? A wirelessly powered charging system for use in implanted biomedical applications is proposed. A sinusoidal ac voltage received through the magnetic inductive link, which… (more)

Lin, Feng-Hsu

2009-01-01T23:59:59.000Z

154

Software-related Energy Footprint of a Wireless Broadband Module  

E-Print Network (OSTI)

on the power consumption. This opens up for potential energy savings by creating better ap- plications Keywords 3G, Energy footprint, Power consumption, Wireless broad- band 1. INTRODUCTION The battery lifetime on performance with limited battery power, we need to employ every possible power saving mea- sure, including

155

Cell Breathing in Wireless LANs: Algorithms and Evaluation  

E-Print Network (OSTI)

, as a load balancing mechanism to handle client congestion in a wireless LAN. We develop power management the transmission power of beacon packets and does not change the transmission power of data packets to avoid used fixed power scheme and performs at par with sophisticated load balancing schemes that require

Qiu, Lili

156

Phosphorus adsorption and desorption properties of lunar simulants  

E-Print Network (OSTI)

efficient phosphorus (P) fertilizer rate that would provide optimal crop growth in Minnesota Basalt Lunar Simulant (MBLS) and Lunar Glass Simulant (LGS). To achieve this objective, simulant P adsorption, desorption and kinetic desorption Q/I relationships...

Sutter, Brad

2012-06-07T23:59:59.000Z

157

Lunar Atmosphere and Dust Environment Explorer Frequently Asked Questions  

E-Print Network (OSTI)

LADEE Lunar Atmosphere and Dust Environment Explorer Frequently Asked Questions What mystery: was lunar dust, electrically charged by solar ultraviolet light, responsible for the presunrise of space exploration through our expertise in science, engineering, mission operations, and data management

Mojzsis, Stephen J.

158

SunShot Initiative: Heliostat System with Wireless Closed-Loop Control  

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

Heliostat System with Wireless Heliostat System with Wireless Closed-Loop Control to someone by E-mail Share SunShot Initiative: Heliostat System with Wireless Closed-Loop Control on Facebook Tweet about SunShot Initiative: Heliostat System with Wireless Closed-Loop Control on Twitter Bookmark SunShot Initiative: Heliostat System with Wireless Closed-Loop Control on Google Bookmark SunShot Initiative: Heliostat System with Wireless Closed-Loop Control on Delicious Rank SunShot Initiative: Heliostat System with Wireless Closed-Loop Control on Digg Find More places to share SunShot Initiative: Heliostat System with Wireless Closed-Loop Control on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage CSP Recovery Act Baseload

159

Implementing a green bicycle alliance using a wireless sensor network  

Science Journals Connector (OSTI)

This study used the wireless sensor network (WSN) technique to design a bike device module, a bike path establishment module and a cloud service module. These three modules were used to address issues related to cycling activities, including green power ...

Haw-Yun Shin; Chung-Ming Own

2014-08-01T23:59:59.000Z

160

The Energy Cost Model of Clustering Wireless Sensor Network Architecture  

Science Journals Connector (OSTI)

The advent of technology has facilitated the development of small, low power devices that combine programmable general purpose computing with multiple sensing and wireless communication capability. This article d...

Yanjun Zhang; Xiaoyun Teng; Hongyi Yu; Hanying Hu

2005-01-01T23:59:59.000Z

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


161

Integrated Modeling and Simulation of Lunar Exploration Campaign Logistics  

E-Print Network (OSTI)

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

de Weck, Olivier L.

162

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)

. Applications include personal electronics, powering of toys and powering of products in storage crates. Index-7], and far-field scavenging of low power densities [8-12]. The applications have ranged from powering solar of inductors, have been commercialized for some time and are still under consideration by a number of companies

Popovic, Zoya

163

Seven Deadliest Wireless Technologies Attacks  

Science Journals Connector (OSTI)

Do you need to keep up with the latest hacks, attacks, and exploits affecting wireless technology? Then you need Seven Deadliest Wireless Technologies Attacks. This book pinpoints the most dangerous hacks and exploits specific to wireless technologies, ...

Brad Haines

2010-03-01T23:59:59.000Z

164

A study of compaction methods for lunar soil simulants  

E-Print Network (OSTI)

Engineering ABSTRACT A Study of Compaction Methods for Lunar Soil Simulants. (August 1993) Rama Varadarajan Ekkad, B. Tech. , Jaw?harlal Nehru Technological University, Hyderabad, India Chair of Advisory Committee: Dr. Walter W. Boles Considerable... 3 6 II LUNAR SOIL STIJDIl S 2. 1 Introduction 2. 2 Lunar Soil Science 2. 2. 1 Grain Properties 2, 2, 2 Physical Properues 2. 3 I unar Soil Simulants 2. 3. I Maryland-Santlers Lunar Simulant 2. 3. 2 Arizona Lunar Simulant ? ALS 2. 3, 3 JSC-1...

Ekkad, Rama Varadarajan

2012-06-07T23:59:59.000Z

165

Wireless Link Scheduling under Physical Interference Model  

E-Print Network (OSTI)

approximation algorithms for link scheduling with or without power control. Index Terms--Link schedulingWireless Link Scheduling under Physical Interference Model Peng-Jun Wan, Ophir Frieder, Xiaohua Jia: jia@cs.cityu.edu.hk, csfyao@cityu.edu.hk Abstract--Link scheduling is a fundamental problem in multi

Jia, Xiaohua

166

A Virtual Infrastructure for Wireless Sensor Networks  

E-Print Network (OSTI)

of microelectromechanical systems (MEMS), miniaturized low-power devices that integrate sensing, special-purpose computing, and wireless communications 107 Handbook of Sensor Networks: Algorithms and Architectures, Edited by I of their operating environ- ment (anonymity of individual sensors, limited energy budget, and a possibly hostile

Stojmenovic, Ivan

167

Developing Lunar Landing Vehicle Display Requirements through Content Analysis of Apollo Lunar Landing Voice Communications  

E-Print Network (OSTI)

The lengthy period since the Apollo landings limits present-day engineers attempting to draw from the experiences of veteran Apollo engineers and astronauts in the design of a new lunar lander. In order to circumvent these ...

Smith, C. A.

2008-01-01T23:59:59.000Z

168

Design and Implementation an Energy-Aware Routing Mechanism for Solar Wireless Sensor Networks  

Science Journals Connector (OSTI)

Due to the thriving development of wireless sensor networks (WSNs) and solar power generation technology, coupled with the continuous progress of the semiconductor industry, solar cell photoelectrical conversion efficiency has increased accordingly, ... Keywords: Wireless sensor networks, solar power, energy-aware, routing

Hung-Chi Chu; Wei-Tsung Siao; Wei-Tai Wu; Sheng-Chih Huang

2011-09-01T23:59:59.000Z

169

Flexible network wireless transceiver and flexible network telemetry transceiver  

DOE Patents (OSTI)

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.

Brown, Kenneth D. (Grain Valley, MO)

2008-08-05T23:59:59.000Z

170

Nodal modulation of the lunar semidiurnal tide in the Bay of Fundy and Gulf of Maine  

SciTech Connect

Observations, numerical modeling, and theoretical calculations show how the 18.6-year modulation of the main lunar semidiurnal tide in the Bay of Fundy and Gulf of Maine is reduced from its astronomical value of 3.7 percent to 2.4 percent by the effects of friction and resonance. The agreement of the three approaches increases confidence in model predictions of widespread changes in the tidal regime resulting from development of tidal power. 12 references, 2 figures, 1 table.

Ku, L.F.; Greenberg, D.A.; Garrett, C.J.R.; Dobson, F.W.

1985-10-04T23:59:59.000Z

171

Lunar Missions, Science, & Astronauts! Interplanetary/Lunar Transfer!  

E-Print Network (OSTI)

program largely military" !! Marxism vs. capitalism" !! Prestige in third world" !! Traditional and modern changed the nature of warfare forever ­ did they?" !! "Mutual assured destruction" vs. survivable nuclear and power" !! Ike didn't buy it" !! Impacts of the 1960 Presidential election" !! U-2 flights found

Stengel, Robert F.

172

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

173

A simulation model for the lifetime of wireless sensor networks  

E-Print Network (OSTI)

In this paper we present a model for the lifetime of wireless sensor networks. The model takes into consideration several parameters such as the total number of sensors, network size, percentage of sink nodes, location of sensors, the mobility of sensors, and power consumption. A definition of the life time of the network based on three different criteria is introduced; percentage of available power to total power, percentage of alive sensors to total sensors, and percentage of alive sink sensors to total sink sensors. A Matlab based simulator is developed for the introduced model. A number of wireless sensor networks scenarios are presented and discussed.

Elleithy, Abdelrahman

2012-01-01T23:59:59.000Z

174

ULTRA SECURE HIGH RELIABILITY WIRELESS RADIATION MONITOR  

SciTech Connect

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

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

2011-08-03T23:59:59.000Z

175

How to survive a Lunar night  

Science Journals Connector (OSTI)

In the frame of the recent worldwide activities of Lunar research, including various studies for surface stations, the aspect of longevity of such stations has been identified as a particular technical challenge. The reason for this lies in the long (about 14 days) and cold Lunar night during which it is non-trivial to keep spacecraft systems alive and sensitive equipment within an acceptable temperature range. The following paper analyzes and compares various concepts to survive Lunar night, both with and without radioisotope heater technology. The latter normally implies the use of highly toxic material (typically plutonium), which is politically problematic and a driver for cost and safety procedures. Concepts without radioisotope heating need to foresee special measures, like extremely efficient thermal insulation or sub-surface positioning of all temperature sensitive components. Special emphasis has been taken on the thermal analysis of a penetrator-type surface station. The relevant issues are discussed and results for day–night cycles are presented, assuming a typical set of engineering parameters. This concept appears to be the easiest to implement from a thermal point of view, if the use of radioisotope heaters has to be avoided.

Stephan Ulamec; Jens Biele; Ed Trollope

2010-01-01T23:59:59.000Z

176

LOCALIZATION AND ENERGY MODELING IN WIRELESS SENSOR Ali Shareef  

E-Print Network (OSTI)

enters a low-power state can potentially result in very large power savings. #12;ACKNOWLEDGMENTS I would components of a sensor node, including processors with emerging energy-saving features, wireless energy-saving strategies in WSN. For example, it can be demonstrated that by carefully selecting

Zhu, Yifeng

177

Forecasting wireless communication technologies  

Science Journals Connector (OSTI)

The purpose of the paper is to present a formal comparison of a variety of multiple regression models in technology forecasting for wireless communication. We compare results obtained from multiple regression models to determine whether they provide a superior fitting and forecasting performance. Both techniques predict the year of wireless communication technology introduction from the first (1G) to fourth (4G) generations. This paper intends to identify the key parameters impacting the growth of wireless communications. The comparison of technology forecasting approaches benefits future researchers and practitioners when developing a prediction of future wireless communication technologies. The items of focus will be to understand the relationship between variable selection and model fit. Because the forecasting error was successfully reduced from previous approaches, the quadratic regression methodology is applied to the forecasting of future technology commercialisation. In this study, the data will show that the quadratic regression forecasting technique provides a better fit to the curve.

Sabrina Patino; Jisun Kim; Tugrul U. Daim

2010-01-01T23:59:59.000Z

178

Network coded wireless architecture  

E-Print Network (OSTI)

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

Katti, Sachin Rajsekhar

2008-01-01T23:59:59.000Z

179

Optimized Charger Deployment for Wireless Rechargeable Sensor Ji-Hau Liao () Wei-Ting So() Jehn-Ruey Jiang()  

E-Print Network (OSTI)

)(Radiant Energy) (Mechanical Energy) 2 [11] 2: [11] (Sola Power): (Photovoltaic Effect) - P-N (Ambient Sensor Network, WRSN)[2] (Energy Harvesting) (Radio Frequency, RF)(Converter) (DC) : I. (Intensive Energy Harvesting): (Wireless Charger) (Power Receiver) (Wireless Charging) [3] II. (Non-Intensive Energy

Jiang, Jehn-Ruey

180

A novel MAC scheduler to minimize the energy consumption in a Wireless Sensor Network  

Science Journals Connector (OSTI)

The rising success of the Internet of Things has led the Wireless Sensor Networks to play an important role in many fields, ranging from military to civilian applications. However, since sensor nodes are battery powered, communication protocols and applications ... Keywords: Duty cycle, Energy saving, MAC scheduler, Performance evaluation, Wireless Sensor Network

Luca Anchora; Antonio Capone; Vincenzo Mighali; Luigi Patrono; Francesco Simone

2014-05-01T23:59:59.000Z

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


181

An Optimal Energy Allocation Algorithm for Energy Harvesting Wireless Sensor Networks  

E-Print Network (OSTI)

. Traditionally, a sensor node is mainly powered by a non-rechargeable battery, which has a limited energy storage by enabling the wireless sensor nodes to replenish energy from ambient sources, such as solar, windAn Optimal Energy Allocation Algorithm for Energy Harvesting Wireless Sensor Networks Shaobo Mao

Wong, Vincent

182

Distributed detection and fusion in a large wireless sensor network of random size  

Science Journals Connector (OSTI)

For a wireless sensor network (WSN) with a random number of sensors, we propose a decision fusion rule that uses the total number of detections reported by local sensors as a statistic for hypothesis testing. We assume that the signal power attenuates ... Keywords: decision fusion, deflection coefficient, distributed detection, wireless sensor networks

Ruixin Niu; Pramod K. Varshney

2005-09-01T23:59:59.000Z

183

Improving energy efficiency via probabilistic rate combination in 802.11 multi-rate wireless networks  

E-Print Network (OSTI)

transmission. An alternative way to conserve energy is to apply power control [1­4]. A wireless node is allowedImproving energy efficiency via probabilistic rate combination in 802.11 multi-rate wireless in revised form 20 January 2009 Accepted 27 January 2009 Available online 6 February 2009 Keywords: Energy

Lui, John C.S.

184

Inkjet-Printed Graphene-Based Wireless Gas Sensor Modules , Vasileios Lakafosis1  

E-Print Network (OSTI)

Inkjet-Printed Graphene-Based Wireless Gas Sensor Modules Taoran Le1 , Vasileios Lakafosis1 , Ziyin we demonstrate the use of graphene as the basis for design and development of low-cost, self-powered, battery-less, wireless sensor solutions utilizing thin films produced from environmentally friendly, water

Tentzeris, Manos

185

Solar Wind and Micrometeorite Effects in the Lunar Regolith  

Science Journals Connector (OSTI)

31 March 1977 research-article Solar Wind and Micrometeorite Effects in the Lunar...chemical effects expected during solar wind bombardment of the lunar regolith. In...surfaces, this outline predicts that solar wind sputtering will tend to clean exposed grain...

1977-01-01T23:59:59.000Z

186

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

187

Smart Grid: Building a Wireless Connection | Department of Energy  

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

Grid: Building a Wireless Connection Grid: Building a Wireless Connection Smart Grid: Building a Wireless Connection October 7, 2010 - 2:41pm Addthis Dr. Kristina Johnson What does this mean for me? Along with creating tens of thousands of new jobs, bringing our grid into the 21st century will give consumers and businesses the information they need to reduce their energy consumption - and better manage their energy bills. Smart grid technologies, tools and techniques will also help us reduce the risk of service interruptions of blackouts by giving utilities real-time information about the health of their power networks. The evolution of the wireless industry serves as a valuable reminder of what's possible when you open an industry up to new competition and capital and allow new business models to take root.

188

Threat Insight Quarterly Wireless Technology  

E-Print Network (OSTI)

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

189

Lunar laser ranging: the millimeter challenge  

Science Journals Connector (OSTI)

Lunar laser ranging has provided many of the best tests of gravitation since the first Apollo astronauts landed on the Moon. The march to higher precision continues to this day, now entering the millimeter regime, and promising continued improvement in scientific results. This review introduces key aspects of the technique, details the motivations, observables, and results for a variety of science objectives, summarizes the current state of the art, highlights new developments in the field, describes the modeling challenges, and looks to the future of the enterprise.

T W Murphy

2013-01-01T23:59:59.000Z

190

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

SciTech Connect

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)

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

2006-07-01T23:59:59.000Z

191

Wireless Sensor Network Fundamentals  

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

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

192

E-Print Network 3.0 - ad-hoc wireless environments Sample Search...  

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

Search Powered by Explorit Topic List Advanced Search Sample search results for: ad-hoc wireless environments Page: << < 1 2 3 4 5 > >> 1 Sum-of-Sinusoid channel models...

193

A high speed image transmission system for ultra-wideband wireless links  

E-Print Network (OSTI)

Ultra-wideband (UWB) communication is an emerging technology that offers short range, high data rate wireless transmission, with low power consumption and low consumer cost. Operating in the 3.1 GHz - 10.6 GHz frequency ...

Liang, Helen He

2009-01-01T23:59:59.000Z

194

Sensemble : a wireless inertial sensor system for the interactive dance and collective motion analysis  

E-Print Network (OSTI)

The motivation for this project is the recent opportunity to leverage low-power, high-bandwidth RF devices and compact inertial sensors to create a wearable, wireless, motion analysis system meeting the demands of many ...

Aylward, Ryan P

2006-01-01T23:59:59.000Z

195

Optical waveguide solar energy system for lunar material processing  

SciTech Connect

This paper summarizes the study on the optical waveguide (OW) solar energy system for lunar material processing. In the OW solar energy system, solar radiation is collected by the concentrator which transfers the concentrated solar radiation to the OW transmission line consisting of low-loss optical fibers and related optical components. The OW line transmits the high intensity solar radiation to the thermal reactor of the lunar materials processing plant. Based on the results discussed in this paper the authors conclude that the OW solar energy system is a viable concept which can effectively utilize solar energy for lunar material processing.

Nakamura, T.; Senior, C.L. [Physical Sciences, Inc., Andover, MA (United States); Shoji, J.M.; Waldron, R.D. [Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Division

1995-11-01T23:59:59.000Z

196

Advanced thermal management needs for Lunar and Mars missions  

SciTech Connect

Significant improvements in thermal management technologies will be required to support NASA's planned Lunar and Mars missions. The developments needed include the application of advanced materials to reduce radiator system masses, enhanced survivability, and the use of alternative working fluids. Current thermal management systems utilize one of two heat rejection alternatives; either single phase pumped loops, or two phase heat pipes constructed with thick walled metal casings. These two technologies have proven themselves to be reliable performers in the transport and rejection of waste heat from spacecraft. As thermal management needs increase with increased power consumption and activity required on spacecraft, these metal based thermal management systems will become mission limiting. Investigations into the use of light weight ceramic materials for high temperature thermal management systems have been conducted by NASA, the Department of Energy, and the Department of Defense since the early 1980s, with results showing that significant mass savings can be obtained by replacing some of the metallic functions with ceramic materials.

Klein, A.C. (Department of Nuclear Engineering, Oregon State University, Corvallis, Oregon 97331 (United States)); Webb, B.J. (Umpqua Research, Inc., P.O. Box 791, Myrtle Creek, Oregon 97457 (United States))

1993-01-15T23:59:59.000Z

197

Laser Ranging for Gravitational, Lunar, and Planetary Science  

E-Print Network (OSTI)

More precise lunar and Martian ranging will enable unprecedented tests of Einstein's theory of General Relativity and well as lunar and planetary science. NASA is currently planning several missions to return to the Moon, and it is natural to consider if precision laser ranging instruments should be included. New advanced retroreflector arrays at carefully chosen landing sites would have an immediate positive impact on lunar and gravitational studies. Laser transponders are currently being developed that may offer an advantage over passive ranging, and could be adapted for use on Mars and other distant objects. Precision ranging capability can also be combined with optical communications for an extremely versatile instrument. In this paper we discuss the science that can be gained by improved lunar and Martian ranging along with several technologies that can be used for this purpose.

Stephen M. Merkowitz; Philip W. Dabney; Jeffrey C. Livas; Jan F. McGarry; Gregory A. Neumann; Thomas W. Zagwodzki

2007-12-20T23:59:59.000Z

198

Lunar lander propellant production for a multiple site exploration mission  

E-Print Network (OSTI)

A model has been developed to analyze the benefit of utilizing a processing plant architecture so that a lunar oxygen production demonstration mission can also provide a significant exploration and scientific return. This ...

Neubert, Joshua, 1981-

2004-01-01T23:59:59.000Z

199

Application of ion electrospray propulsion to lunar and interplanetary missions  

E-Print Network (OSTI)

High specific impulse electric propulsion systems enable ambitious lunar and interplanetary missions that return a wealth of scientific data. Many of these technologies are difficult to scale down, meaning the spacecraft ...

Whitlock, Caleb W. (Caleb Wade)

2014-01-01T23:59:59.000Z

200

Hydrogen, Oxygen and Silicon Isotope Systematics in Lunar Material  

Science Journals Connector (OSTI)

31 March 1977 research-article Hydrogen, Oxygen and Silicon Isotope Systematics...are supported: (1) The bulk of the hydrogen in the lunar soils represents protons...samples of relatively detuerium rich hydrogen are found, probably resulting from in...

1977-01-01T23:59:59.000Z

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


201

The Emergence of RF-Powered Computing  

Science Journals Connector (OSTI)

Extracting power "from thin air" has a quality of science fiction about it, yet technology trends make it likely that in the near future, small computers in urban areas will use ambient RF signals for both power and communication. The first Web extra ... Keywords: Backscatter,RF signals,Radio frequency,Computers,Telemetry,TV,Power distribution,Wireless communication,Ubiquitous computing,emerging technologies,wireless communication,ubiquitous computing

Shyamnath Gollakota, Matthew Reynolds, Joshua Smith, David Wetherall

2014-01-01T23:59:59.000Z

202

Energy harvester for a wireless sensor in a boiler environment  

Science Journals Connector (OSTI)

Abstract Wireless sensors have become a focus of study in the field of measurement technologies. The power supply of many wireless sensors is based on batteries or external power sources. However, there is increasing interest in finding solutions where the batteries can be leaved away and the power for the wireless sensors is produced from the environment in which the sensors operate. The technologies required are called energy harvesting or scavenging technologies. This paper introduces the principles, modeling and a practical implementation of a self-powering solution for a wireless sensor for energy boilers or other hot reactor vessels. With the aid of energy solution introduced, the wireless sensor can operate autonomously without any batteries. One of the design targets in this work was that the top part of harvester’s mechanics must fit to the opening or assembly tube of diameter less than 15 mm in the boiler wall reserved for standard instrument assemblies. So the top of harvester collects and conducts thermal energy to element generating electricity from it. The harvester and further the measuring and communication electronics are mounted outside the hot area. The harvester solution introduced in the paper can produce about 114 mW power, when top of harvester mechanics was inserted to the test oven heated to temperature of +500 °C. The sensor function or type is not defined nor limited in this study. The electric energy generated by harvester can be used to power, for example, temperature, heat flux, flow, vibration or other little energy needing sensors.

Ilkka Korhonen; Raija Lankinen

2014-01-01T23:59:59.000Z

203

Short-Term Solar Energy Forecasting Using Wireless Sensor Networks  

E-Print Network (OSTI)

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

Cerpa, Alberto E.

204

Design Considerations for Ultra-Low Energy Wireless Microsensor Nodes  

E-Print Network (OSTI)

. The most familiar sources of ambient energy include solar power, thermal gradients, radio-frequency (RF to retain local energy storage. Coupling energy- harvesting techniques with some form of energy storage canDesign Considerations for Ultra-Low Energy Wireless Microsensor Nodes Benton H. Calhoun, Student

Chandrakasan, Anantha

205

Improved Wireless Performance from Mode Scattering in Ventilation Ducts  

E-Print Network (OSTI)

, the authors of [1] note a possible impact of mode scattering effects to the power levels measured in test HVAC filtering effect. So far this hypothesis has yet to be explorered. Al- though the authors of [2] present to investigate the impact that mode filtering has on an actual wireless communication. Experimental Analysis

Stancil, Daniel D.

206

Queue management based duty cycle control for end-to-end delay guarantees in wireless sensor networks  

Science Journals Connector (OSTI)

In this paper, we propose an analytical method for duty cycle adaptation in wireless sensor networks so that delay requirement is guaranteed while power consumption is minimized. The proposed method, named Dual-QCon, provides a formal method for stabilizing ... Keywords: Delay guarantee, Duty cycle control, Wireless sensor networks

Heejung Byun; Soogook Son; Jungmin So

2013-08-01T23:59:59.000Z

207

Wireless technology and library acoustics  

Science Journals Connector (OSTI)

The modern library cannot function without modern technology. Printers copiers wireless computers and espresso machines all contribute to the soundscape of the typical municipal library (and many academic libraries too). While some of these noise sources are stationary and can be isolated acoustically wireless computing has transformed the acoustic experience for the typical library patron. Study carrels and desks used to define the boundaries of study and work areas in libraries and architects could design spaces accordingly. With wireless technology every space is a study space. This paper will discuss the implications of wireless technology on library acoustics. Measurement results at a variety of case study libraries will be presented.

2006-01-01T23:59:59.000Z

208

Emerging Applications of Wireless Technologies  

Science Journals Connector (OSTI)

...“Smart Grid” is another example of application using wireless technology that has the potential of subtle ... which improve generation, distribution, and delivery of electricity. The current electricity grids ...

Jan Kruys; Luke Qian

2011-01-01T23:59:59.000Z

209

Fuel loading of PeBR for a long operation life on the lunar surface  

SciTech Connect

The Pellet Bed Reactor (PeBR) power system could provide 99.3 kW e to a lunar outpost for 66 full power years and is designed for no single point failures. The core of this fast energy spectrum reactor consists of three sectors that are neutronically and thermally coupled, but hydraulically independent. Each sector has a separate Closed Brayton Cycle (CBC) loop for energy conversion and separate water heat-pipes radiator panels for heat rejection. He-Xe (40 g/mole) binary gas mixture serves as the reactor coolant and CBC working fluid. On the lunar surface, the emplaced PeBR below grade is loaded with spherical fuel pellets (1-cm in dia.). It is launched unfueled and the pellets are launched in separate subcritical canisters, one for each core sector. This paper numerically simulates the transient loading of a core sector with fuel pellets on the Moon. The simulation accounts for the dynamic interaction of the pellets during loading and calculates the axial and radial distributions of the volume porosity in the sector. The pellets pack randomly with a volume porosity of 0.39 - 0.41 throughout most of the sector, except near the walls the local porosity is higher. (authors)

Schriener, T. M. [Inst. for Space and Nuclear Power Studies, Univ. of New Mexico, Albuquerque, NM (United States); Chemical and Nuclear Engineering Dept., Univ. of New Mexico, Albuquerque, NM (United States); El-Genk, M. S. [Inst. for Space and Nuclear Power Studies, Univ. of New Mexico, Albuquerque, NM (United States); Chemical and Nuclear Engineering Dept., Univ. of New Mexico, Albuquerque, NM (United States); Mechanical Engineering Dept., Univ. of New Mexico, Albuquerque, NM (United States)

2012-07-01T23:59:59.000Z

210

Deploying Power-Aware, Wireless Sensor Agents  

Science Journals Connector (OSTI)

......active-duty and Reserve personnel, and soldiers and airmen...communication and cluster head selection began to operate as...withdrawal of troops and personnel (and the regional node...exercise and the primary training venue for Commander...the urban operations training facility (UOTF) for......

Daniel D. Corkill

2011-03-01T23:59:59.000Z

211

Transmission Power Management for Wireless Health Applications  

E-Print Network (OSTI)

conference on Body area networks, 2008. [Arduino]Arduino, [Online]. Available: http://www.arduino.cc/ [IEEE, 2005, pp. 37-44. [Arduino] Arduino CC. Arduino Pro

Amini, Navid

2012-01-01T23:59:59.000Z

212

Active Scheme to Measure Throughput of Wireless Access Link in Hybrid Wired-Wireless Network  

E-Print Network (OSTI)

, at the wireless The authors are with Networking Research Laboratory, Department of Electrical and Computer1 Active Scheme to Measure Throughput of Wireless Access Link in Hybrid Wired-Wireless Network to measure the download throughput of an IEEE 802.11 wireless access link in a hybrid wired-wireless network

Rojas-Cessa, Roberto

213

Thursday, March 26, 2009 POSTER SESSION II: LUNAR DUST AND TRANSIENT SURFACE PHENOMENA  

E-Print Network (OSTI)

Modification of Materials for Lunar Dust Adhesion Mitigation [#1121] The surface energy of polymer films, magnetosphere, and the solar wind. Taylor L. A. Liu Y. Zhang A. Shape and Size Relationship of Several Lunar dust, but also introduce obstacle

Rathbun, Julie A.

214

The JPL lunar gravity field to spherical harmonic degree 660 from the GRAIL Primary Mission  

E-Print Network (OSTI)

The lunar gravity field and topography provide a way to probe the interior structure of the Moon. Prior to the Gravity Recovery and Interior Laboratory (GRAIL) mission, knowledge of the lunar gravity was limited mostly to ...

Konopliv, Alex S.

215

IMPORTANT CONSIDERATIONS FOR LUNAR SOIL SIMULANTS Lawrence A. Taylor and Yang Liu  

E-Print Network (OSTI)

experts repeatedly advised that "one size does not fit all", meaning that each lunar soil simulant should to lunar soils; JSC-1A made with nanophase Fe has an order of magnitude more nanophase magnetite than

Perfect, Ed

216

Microsoft Word - Wireless - Nike CX.doc  

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

6, 2010 6, 2010 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Tim Murray Project Manager - TELP-TPP-3 Proposed Action: Nike Clearwire Wireless Communication Facilities Budget Information: WO# 227499, Task 01 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.7 Acquisition, installation, operation, and removal of communication systems... B1.15 Siting, construction (or modification), and operation of support buildings or support structures... B1.19 Siting, construction, and operation of microwave and radio communication towers and associated facilities... Location: Washington County, Oregon, Township 1 South, Range 1 West, Section 5 Proposed by: Bonneville Power Administration (BPA)

217

Display Size Wireless LAN  

E-Print Network (OSTI)

.) - Security sofware ­ESET Smart Security. No Reuse PC with English OS for this time. PC PC Code Image Brand PC PC Code Image Brand Model F008 Panasonic CF-W2 Pentium733 M 1.10GHz 256MB 40GB 12.1 inch 1.0kg System Memory HDD Display Size Weight OS Accessory LAN Wireless LAN Remarks PC PC Code Image Brand

Katsumoto, Shingo

218

FEMP Technology Brief: Wireless Sensor Networks for Data Centers |  

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

Wireless Sensor Networks for Data Centers Wireless Sensor Networks for Data Centers FEMP Technology Brief: Wireless Sensor Networks for Data Centers October 7, 2013 - 9:15am Addthis The geometrical arrangement of your server rack in a data center to optimize heat removal can dramatically lower cooling and fan power needs. Server rack configuration in the Data Center at the National Renewable Energy Laboratory (NREL) Research Support Facility. Photo credit: NREL PIX 18784 The waste heat emitted from institutional data center servers can be removed more efficiently when design considerations are evaluated and innovative monitoring sensor networks are installed for verification and measurement. Hot aisle containment system in the Data Center at the NREL Research Support Facility. Photo credit: NREL PIX 18780

219

FEMP Technology Brief: Wireless Sensor Networks for Data Centers |  

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

FEMP Technology Brief: Wireless Sensor Networks for Data Centers FEMP Technology Brief: Wireless Sensor Networks for Data Centers FEMP Technology Brief: Wireless Sensor Networks for Data Centers October 7, 2013 - 9:15am Addthis The geometrical arrangement of your server rack in a data center to optimize heat removal can dramatically lower cooling and fan power needs. Server rack configuration in the Data Center at the National Renewable Energy Laboratory (NREL) Research Support Facility. Photo credit: NREL PIX 18784 The waste heat emitted from institutional data center servers can be removed more efficiently when design considerations are evaluated and innovative monitoring sensor networks are installed for verification and measurement. Hot aisle containment system in the Data Center at the NREL Research Support Facility. Photo

220

Lunar energetic neutral atom (ENA) spectra measured by the interstellar boundary explorer (IBEX)  

Science Journals Connector (OSTI)

Abstract The solar wind continuously flows out from the Sun, filling interplanetary space and directly interacting with the surfaces of small planetary bodies and other objects throughout the solar system. A significant fraction of these ions backscatter from the surface as energetic neutral atoms (ENAs). The first observations of these ENA emissions from the Moon were recently reported from the Interstellar Boundary Explorer (IBEX). These observations yielded a lunar ENA albedo of ?10% and showed that the Moon reflects ?150 metric tons of neutral hydrogen per year. More recently, a survey of the first 2.5 years of IBEX observations of lunar \\{ENAs\\} was conducted for times when the Moon was in the solar wind. Here, we present the first IBEX ENA observations when the Moon is inside the terrestrial magnetosheath and compare them with observations when the Moon is in the solar wind. Our analysis shows that: (1) the ENA intensities are on average higher when the Moon is in the magnetosheath, (2) the energy spectra are similar above ~0.6* solar wind energy but below there are large differences of the order of a factor of 10, (3) the energy spectra resemble a power law with a “hump” at ?0.6 * solar wind energy, and (4) this “hump” is broader when the Moon is in the magnetosheath. We explore potential scenarios to explain the differences, namely the effects of the topography of the lunar surface and the consequences of a very different Mach number in the solar wind versus in the magnetosheath.

F. Allegrini; M.A. Dayeh; M.I. Desai; H.O. Funsten; S.A. Fuselier; P.H. Janzen; D.J. McComas; E. Möbius; D.B. Reisenfeld; D.F. Rodríguez M.; N. Schwadron; P. Wurz

2013-01-01T23:59:59.000Z

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


221

Power optimization of algorithmic analog-to-digital converters  

Science Journals Connector (OSTI)

The dissertation presents techniques for power optimization in algorithmic analog-to-digital converters (ADCs) enabling realization of ultra low power data converters. Implantable biomedical devices and autonomous wireless sensor networks are among the ...

Steven Daniel Tucker / David M. Binkley

2005-01-01T23:59:59.000Z

222

Handoff Notification in Wireless Hybrid Networks  

Science Journals Connector (OSTI)

Hybrid networks composed of a wireless infrastructure network providing Internet access to an underlying...

Guillaume Chelius; Claude Chaudet

2005-01-01T23:59:59.000Z

223

Pervasive healthcare and wireless health monitoring  

Science Journals Connector (OSTI)

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

Upkar Varshney

2007-03-01T23:59:59.000Z

224

Development of power facility management services using RFID/USN  

Science Journals Connector (OSTI)

In the electric power industry, there are many research projects to stabilise the power and increase the efficiency using ubiquitous technology. Many power utilities control and supervise the transmission line of energy to avoid power failures. In this ... Keywords: #, 47, RFID, RFID&, USN, cable joint, electric power industry, power facility management, radio frequency identification, service framework, ubiquitous sensor networks, wireless networks

Young-Il Kim; Jae-Ju Song; Jin-Ho Shin; Bong-Jae Yi; Hoon Choi

2009-03-01T23:59:59.000Z

225

Wireless LAN E001 Fujitsu  

E-Print Network (OSTI)

PC Code Image Brand Model 1 / 5 #12; CPU System Memory HDD Display Size Weight OS Accessory LAN Wireless LAN Remarks PC PC Code Image Brand Model E008 EPSON Endeavor NT331 Celeron M1.40GHz LAN Wireless LAN Remarks PC PC Code Image Brand Model E019 EPSON Endeavor NT331 Celeron M1.40GHz

Katsumoto, Shingo

226

Wireless LAN G001 Panasonic  

E-Print Network (OSTI)

Office MicrosoftOffice OSPC PC PC Code Image Brand Model All Reuse Note PC contain these software LAN Wireless LAN Remarks PC PC Code Image Brand Model G007 Panasonic CF-R7 Core2 Duo U7700 1 Accessory LAN Wireless LAN Remarks PC PC Code Image Brand Model G015 NEC Versa PC- VJ14MEFUW Celeron M

Katsumoto, Shingo

227

Lunar soil as shielding against space radiation J. Miller a,*, L. Taylor b  

E-Print Network (OSTI)

Lunar soil as shielding against space radiation J. Miller a,*, L. Taylor b , C. Zeitlin c , L Sciences, Chiba 263-8555, Japan a r t i c l e i n f o Article history: Received 6 August 2008 Accepted 28 January 2009 Keywords: Lunar soil Lunar regolith Space radiation shielding Galactic cosmic radiation (GCR

Perfect, Ed

228

Optimisation of seismic network design: Application to a geophysical international lunar network  

E-Print Network (OSTI)

Optimisation of seismic network design: Application to a geophysical international lunar network. Informations about lunar seismicity and seismic subsurface models from the Apollo missions are used as a priori information in this study to optimise the geometry of future lunar seismic networks in order to best resolve

Sambridge, Malcolm

229

Lunar and solar FTIR nitric acid measurements at Eureka in winter  

E-Print Network (OSTI)

Lunar and solar FTIR nitric acid measurements at Eureka in winter 2001/2002: comparisons acid measurements at Eureka obtained in winter 2001­2002 using solar and lunar Fourier transform Eureka (80.1°N, 86.4°W), Canada, have been made during polar night using lunar spectra recorded

Wirosoetisno, Djoko

230

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

E-Print Network (OSTI)

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

Dai, Lillian Lei, 1978-

2008-01-01T23:59:59.000Z

231

Wireless Control Systems:Wireless Control Systems: Scientific Challenges andScientific Challenges and  

E-Print Network (OSTI)

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

Johansson, Karl Henrik

232

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

DOE Patents (OSTI)

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

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

2012-05-08T23:59:59.000Z

233

Software-defined Radio based Wireless Tomography: Experimental Demonstration and  

E-Print Network (OSTI)

1 Software-defined Radio based Wireless Tomography: Experimental Demonstration and Verification presents an experimental demonstration of Software-Defined Radio (SDR) based wireless tomography us- ing follows our vision and previous theoretical study of wireless tomography which combines wireless

Qiu, Robert Caiming

234

Multiuser Wireless Communication Systems Ashutosh Sabharwal and Behnaam Aazhang  

E-Print Network (OSTI)

of Electrical and Computer Engineering Rice University Houston TX 77005 Abstract Wireless cellular systems haveMultiuser Wireless Communication Systems Ashutosh Sabharwal and Behnaam Aazhang Department high speed wireless networks. Keywords : Wireless communications, channel estimation, multiuser

Sabharwal, Ashutosh

235

Petri net based evaluation of energy consumption in wireless sensor nodes  

Science Journals Connector (OSTI)

Wireless Sensor Networks have proven their capability to deal with problems where wide and hardly accessible areas need to be monitored. Among the other systems there are also sensor networks in which nodes can voluntarily modify their positions to better ... Keywords: Environmental Monitoring, Fluid Stochastic Petri Nets, Power Consumption Modelling, Power-Aware Systems

Maurizio D'Arienzo; Mauro Iacono; Stefano Marrone; Roberto Nardone

2013-10-01T23:59:59.000Z

236

Analysis of a Cone-Based Distributed Topology Control Algorithm for Wireless Multi-hop Networks  

E-Print Network (OSTI)

], network protocols that min- imize energy consumption are key to the successful usage of wireless sensor at maximum power then, if a graph Ga con- taining is R, i.e. p(R) = P. If every node transmits with power P, then we have an induced graph GR = (V, E

Chaudhuri, Soma

237

A Battery-Free Tag for Wireless Monitoring of Heart Sounds  

E-Print Network (OSTI)

A Battery-Free Tag for Wireless Monitoring of Heart Sounds Soumyajit Mandal, Lorenzo Turicchia that monitors heart sounds. The tag powers up by harvesting ambient RF energy, and contains a low measure heart rate at distances up to 7m from an FCC-compliant RF power source. We also suggest how delays

Sarpeshkar, Rahul

238

Energy-Efficient Modulation Design for Reliable Communication in Wireless Networks  

E-Print Network (OSTI)

Energy-Efficient Modulation Design for Reliable Communication in Wireless Networks Qing Chen transmit power scenarios. We have noted that variable power schemes can attain higher energy-efficiencies. The analysis of energy-efficient modulation design is also conducted in multi- hop linear networks

Gursoy, Mustafa Cenk

239

E-Print Network 3.0 - ad-hoc wireless sensor Sample Search Results  

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

in wireless sensor networks The rapid progress of wireless communication and embedded micro-sensing MEMS... technologies has made wireless sensor networks possible. A wireless...

240

Wireless System Considerations When Implementing NERC Critical  

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

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

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


241

Energy Solutions Using Wireless Telemetry  

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

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

242

Security Scheme in Wireless Grid  

Science Journals Connector (OSTI)

In this paper, we considered the two security services of authorization and data security in wireless Grid. The security issues is related to authorization and security, specific to Grid, the characteristics of t...

Yue Hong Zhang; Li Hao; Zhong Shan Yang

2011-01-01T23:59:59.000Z

243

Wireless Communications in Smart Grid  

Science Journals Connector (OSTI)

Communication networks play a crucial role in smart grid, as the intelligence of this complex system ... essential part of the scalable communication infrastructure for smart grid. In particular, wireless network...

Zoran Bojkovic; Bojan Bakmaz

2014-01-01T23:59:59.000Z

244

Solar Wind and Micrometeorite Effects in the Lunar Regolith  

Science Journals Connector (OSTI)

31 March 1977 research-article Solar Wind and Micrometeorite Effects in the...physical and chemical effects expected during solar wind bombardment of the lunar regolith...grain surfaces, this outline predicts that solar wind sputtering will tend to clean exposed...

1977-01-01T23:59:59.000Z

245

LOW-COST LUNAR COMMUNICATION AND NAVIGATION Keric Hill,  

E-Print Network (OSTI)

, and using these low-energy transfers, it should be possible to launch the entire constellation on a single significantly lower the cost of establishing and maintaining small lunar communication relay constellations in halo orbits. Autonomous orbit determination would allow the constellation to navigate without expensive

Born, George

246

New Views of Lunar Geoscience: An Introduction and Overview  

Science Journals Connector (OSTI)

...returned from the highland landing sites and about 50% of all...lunar impact craters, and comets play only a minor role. Most...example, at the Apollo 16 landing site ejecta deposits of Nectaris...Hadley Rille at the Apollo 15 landing site (Fig. 1.22b ). In...

Harald Hiesinger; James W. Head III

247

Understanding the Lunar Surface and Space-Moon Interactions  

Science Journals Connector (OSTI)

...remote-sensing level for all of the Apollo and Luna landing sites (Gillis et al. 2003) (Fig 2...However, the Moon has been impacted by comets regularly over its history so it is possible...proposed to be the result of interaction of a comet with the lunar surface. The Near Infrared...

Paul Lucey; Randy L. Korotev; Jeffrey J. Gillis; Larry A. Taylor; David Lawrence; Bruce A. Campbell; Rick Elphic; Bill Feldman; Lon L. Hood; Donald Hunten; Michael Mendillo; Sarah Noble; James J. Papike; Robert C. Reedy; Stefanie Lawson; Tom Prettyman; Olivier Gasnault; Sylvestre Maurice

248

NASA/CR2004208938 Lunar Receiving Laboratory Project History  

E-Print Network (OSTI)

NASA/CR­2004­208938 Lunar Receiving Laboratory Project History Susan Mangus Muskingum College New Concord, Ohio William Larsen Johnson Space Center Houston, Texas June 2004 #12;THE NASA STI PROGRAM OFFICE . . . IN PROFILE Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Rathbun, Julie A.

249

NASA/TP--2003210793 Lunar Surface Reference Missions  

E-Print Network (OSTI)

July 2003 NASA/TP--2003­210793 Lunar Surface Reference Missions: A Description of Human and Robotic #12;The NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program

Rathbun, Julie A.

250

On the Origin of the Lunar Surface Features  

Science Journals Connector (OSTI)

...the center of the luniar disk; both groups look like...also have been caused by flying fragments. In some cases...the center of the lunar disk, Ptolemy, Alphonsus...three show damage done by flying fragments from Mare Imbrium...near the center of the disk, is a medium-sized...

Gerard P. Kuiper

1954-01-01T23:59:59.000Z

251

NATIONAL AERONAUTlcr ANn SPACE ADMINISTRATION Apollo Lunar Surface  

E-Print Network (OSTI)

EXPERIMENT SUPRATHERMAL ION DETECTOR ·COLD-CATHODE ION GAGE ·SOLAR WIND SPECTROMETER ·CHARGED and '" / Analysis (Off-Line) , ........!\\ ~,apes I L 7 \\ ~ High-Speed Data ... Comma,nds / L _ )( /' Wide ANGULAR RATE IN ELLIPTICAL ORBIT AROUND EARTH ± 6.5° LUNAR LATITUDE DUE TO: INCLINATION OF MOON'S ROTATION

Rathbun, Julie A.

252

A wireless sensor tag platform for container security and integrity  

SciTech Connect

Cargo containers onboard ships are widely used in the global supply chain. The need for container security is evidenced by the Container Security Initiative launched by the U.S. Bureau of Customs and Border Protection (CBP). One method of monitoring cargo containers is using low power wireless sensor tags. The wireless sensor tags are used to set up a network that is comprised of tags internal to the container and a central device. The sensor network reports alarms and other anomalies to a central device, which then relays the message to an outside network upon arrival at the destination port. This allows the port authorities to have knowledge of potential security or integrity issues before physically examining the container. Challenges of using wireless sensor tag networks for container security include battery life, size, environmental conditions, information security, and cost among others. PNNL developed an active wireless sensor tag platform capable of reporting data wirelessly to a central node as well as logging data to nonvolatile memory. The tags, operate at 2.4 GHz over an IEEE 802.15.4 protocol, and were designed to be distributed throughout the inside of a shipping container in the upper support frame. The tags are mounted in a housing that allows for simple and efficient installation or removal prior to, during, or after shipment. The distributed tags monitor the entire container volume. The sensor tag platform utilizes low power electronics and provides an extensible sensor interface for incorporating a wide range of sensors including chemical, biological, and environmental sensors.

Amaya, Ivan A.; Cree, Johnathan V.; Mauss, Fredrick J.

2011-05-06T23:59:59.000Z

253

IEEE COMMUNICATIONS MAGAZINE, SPECIAL ISSUE MULTIACCESS FOR BROADBAND WIRELESS 100 Wireless Bandwidth in the Making  

E-Print Network (OSTI)

IEEE COMMUNICATIONS MAGAZINE, SPECIAL ISSUE MULTIACCESS FOR BROADBAND WIRELESS 100 Wireless to approaching the information theoretic limits of wireless multiple­access channels. This article offers a brief review of those technologies and their promise to meet future demand for wireless data rate. Keywords

Verdú, Sergio

254

Control over Wireless NetworksControl over Wireless Networks Karl Henrik Johansson  

E-Print Network (OSTI)

Control over Wireless NetworksControl over Wireless Networks Karl Henrik Johansson School of Electrical Engineering Royal Institute of Technology Stockholm, Sweden 25th Benelux Meeting on Systems, 2006 Wireless control systemWireless control system Sensors Controllers Actuators A collection

Johansson, Karl Henrik

255

EVERYONE, IT SEEMS, IS GOING WIRELESS. Wireless communications technology even shares  

E-Print Network (OSTI)

data sent over wireless net- works with minimal signal degradation. Professor of electrical engineeringEVERYONE, IT SEEMS, IS GOING WIRELESS. Wireless communications technology even shares the spotlight with celebrities and political leaders in major news media. In fact, Newsweek recently took a look at the wireless

Bieber, Michael

256

A wireless volume control receiver for hearing aids  

E-Print Network (OSTI)

) Robert DeOtte ember) ~ Jolte Pineda Gyvez (Me r) Alt n Patton (Head o Department) August 1993 ABSTRACT A Wireless Volume Control Receiver for Hearing Aids. (August 1993) Alexander Herve Reyes, B. S. , Texas A&M University Chair of Advisory... Committee: Dr. Edgar Sdnchez ? Sinencio Hearing aids have been greatly improved over the past few years because of better technology and more innovative ideas. Today, these devices are smaller in size, consume less power and some can be programmed to fit...

Reyes, Alexander Herve

2012-06-07T23:59:59.000Z

257

Wireless Josephson amplifier  

SciTech Connect

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

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

2014-06-09T23:59:59.000Z

258

Wireless Transfer of Electricity in Outer Space  

E-Print Network (OSTI)

Author offers conclusions from his research of a revolutionary new idea - transferring electric energy in the hard vacuum of outer space wirelessly, using a plasma power cord as an electric cable (wire). He shows that a certain minimal electric currency creates a compressed force that supports the plasma cable in the compacted form. A large energy can be transferred hundreds of millions of kilometers by this method. The required mass of the plasma cable is only hundreds of grams. He computed the macroprojects: transference of hundreds kilowatts of energy to Earth's Space Station, transferring energy to the Moon or back, transferring energy to a spaceship at distance 100 million of kilometers, the transfer energy to Mars when one is located at opposed side of the distant Sun, transfer colossal energy from one of Earth's continents to another continent (for example, between Europe-USA) wirelessly-using Earth's ionosphere as cable, using Earth as gigantic storage of electric energy, using the plasma ring as huge...

Bolonkin, A

2007-01-01T23:59:59.000Z

259

Wireless Transfer of Electricity in Outer Space  

E-Print Network (OSTI)

Author offers conclusions from his research of a revolutionary new idea - transferring electric energy in the hard vacuum of outer space wirelessly, using a plasma power cord as an electric cable (wire). He shows that a certain minimal electric currency creates a compressed force that supports the plasma cable in the compacted form. A large energy can be transferred hundreds of millions of kilometers by this method. The required mass of the plasma cable is only hundreds of grams. He computed the macroprojects: transference of hundreds kilowatts of energy to Earth Space Station, transferring energy to the Moon or back, transferring energy to a spaceship at distance 100 million of kilometers, the transfer energy to Mars when one is located at opposed side of the distant Sun, transfer colossal energy from one of Earth's continents to another continent (for example, between Europe-USA) wirelessly-using Earth ionosphere as cable, using Earth as gigantic storage of electric energy, using the plasma ring as huge MagSail for moving of spaceships. He also demonstrates that electric currency in a plasma cord can accelerate or brake spacecraft and space apparatus.

Alexander Bolonkin

2007-01-04T23:59:59.000Z

260

Wireless Technology Leaps the Last Mile  

Science Journals Connector (OSTI)

Topics include "Wireless Technology Leaps the Last Mile," "Researcher Turns Computers into Better Listeners," and "IBM Puts Encryption in a Processor. Keywords: wireless technology, speech recognition technology, encryption, digital-content protection

Linda Dailey Paulson

2006-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "lunar wireless power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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261

Network coding for robust wireless networks  

E-Print Network (OSTI)

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

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

2012-01-01T23:59:59.000Z

262

Wireless, automated monitoring for potential landslide hazards  

E-Print Network (OSTI)

This thesis describes research efforts toward the development of a wireless sensor node, which can be employed in durable and expandable wireless sensor networks for remote monitoring of soil conditions in areas conducive to slope stability failures...

Garich, Evan Andrew

2007-09-17T23:59:59.000Z

263

Ontological Configuration Management for Wireless Mesh Routers  

Science Journals Connector (OSTI)

Wireless mesh networks (WMNs) are a category of wireless networks that are self-organized, robust and which offer more flexible client coverage with less equipment requirements than wired networks. In WMNs, mesh routers constitute the network's "backbone". ...

Iván Díaz; Cristian Popi; Olivier Festor; Juan Touriño; Ramón Doallo

2009-10-01T23:59:59.000Z

264

Wireless device monitoring systems and monitoring devices, and associated methods  

DOE Patents (OSTI)

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

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

2014-05-27T23:59:59.000Z

265

The world of wireless and kids  

Science Journals Connector (OSTI)

In this panel, we will explore the impact that emerging new wireless technologies have on the way children learn, communicate and play. The challenge of interface design for children's wireless technologies will be discussed along with the opportunities ... Keywords: children, educational applications, wireless technologies

Allison Druin; Erik Strommen; Matt Barranca; Heiko Sacher; Deborah G. Tatar; Elliot Solloway

2002-04-01T23:59:59.000Z

266

Electrical and Computer Engineering 5870 Wireless Communications  

E-Print Network (OSTI)

Electrical and Computer Engineering 5870 Wireless Communications Fall 2011 Syllabus Instructor:45 Office Hours: e-mail for appointment (including weekend days) Textbooks: ­ "Wireless Communications: Principles and Communications" by Theodore S. Rappaport, 2nd edition, 2003, Prentice Hall ­ "Wireless

Cetiner, Bedri A.

267

www.sea.co.uk a Cohort plc company L-DAP Lunar Dust Analysis Package  

E-Print Network (OSTI)

www.sea.co.uk a Cohort plc company L-DAP Lunar Dust Analysis Package Study Overview ESTEC Contract.sea.co.uk a Cohort plc company Dust Problems.. · "I think probably the most aggravating, restricting facets of lunar #12;www.sea.co.uk a Cohort plc company Lunar South Pole ... L-DAP Overview 28th Oct 2011 · South Pole

Anand, Mahesh

268

Implementing a Low Power TDMA Protocol Over 802.11  

E-Print Network (OSTI)

, 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 and implementation of our protocol and its performance compared to standard 802.11 in terms of throughput, power

269

A COMPENDIUM OF LUNAR SURFACE EXPERIMENTS  

E-Print Network (OSTI)

"'STRUCTURE/THERMAL SUBSYSTEM COMPONENTS / _____) STRUCTURE/THERMAL SUBSYSTEM TO CENTRAL STATION COMPONENTS FROM ALSEP SUBPACKAGE N0.1 PALLET ',__// STRUCTURE/THERMAL SUBSYSTEM COMPONENTS STRUCTURE/THERMAL~~~~~:j RACK ASSEMBLY ~~~-..~~DRILL STRINGS ,.......__ BATTERY PACK ....__, AND HANDLE POWER HEAD

Rathbun, Julie A.

270

Lunar Laser Ranging and the Brans-Dicke Theory  

Science Journals Connector (OSTI)

Laser ranging to an optical corner reflector on the lunar surface may make possible a test of non-Newtonian gravitational theories. The results of a theoretical calculation of the Brans-Dicke corrections to the laser-pulse transit time are compared with results previously obtained for the Einstein theory. A further analysis of the measurable non-Newtonian correction term which dominates the predictions of both theories indicates that the term probably is common to all Lorentz-covariant gravitational theories.

Christine Krogh and Ralph Baierlein

1968-11-25T23:59:59.000Z

271

1Center for Wireless Technology Eindhoven Where innovation starts  

E-Print Network (OSTI)

1Center for Wireless Technology Eindhoven Where innovation starts Department of Electrical Engineering Center for Wireless Technology Eindhoven #12;2 3Center for Wireless Technology Eindhoven Wireless communication Wireless communication is an integral and increasingly important aspect of our daily lives

Franssen, Michael

272

Implementing a green bicycle alliance using a wireless sensor network  

Science Journals Connector (OSTI)

This study used the wireless sensor network (WSN) technique to design a bike device module, a bike path establishment module and a cloud service module. These three modules were used to address issues related to cycling activities, including green power supply, activity and health records, trajectory monitoring and group positioning and immediate safety issues. GPS was not required, and as long as the cyclists remained on the paths provided by the bike path establishment module and used the cloud service module, the previously mentioned issues could be addressed. The cloud service module included a path establishment simulation system that could enable a path manager to simulate paths before they were physically provided, to determine the ideal establishment method for providing wireless sensor nodes. This study use the Danshui Golden Waterfront in northern Taiwan to implement on-site establishment and installation.

Haw-Yun Shin; Chung-Ming Own

2014-01-01T23:59:59.000Z

273

From proton conductive nanowires to nanofuel cells: A powerful candidate for generating electricity for self-powered nanosystems  

Science Journals Connector (OSTI)

The likely goal of nanotechnology is the integration of individual nanodevices into a nanosystem, which includes the nanodevice(s), power harvesting unit, data processing logic system, and possibly wireless co...

Caofeng Pan; Jun Luo; Jing Zhu

2011-11-01T23:59:59.000Z

274

Solar-wind protons and heavy ions sputtering of lunar surface materials A.F. Barghouty a,  

E-Print Network (OSTI)

Solar-wind protons and heavy ions sputtering of lunar surface materials A.F. Barghouty a, , F Available online 21 December 2010 Keywords: Solar wind sputtering Lunar regolith KREEP soil Potential a c t Lunar surface materials are exposed to $1 keV/amu solar-wind protons and heavy ions on almost

275

Physical layer-aware wireless link layer protocols  

E-Print Network (OSTI)

With wireless devices becoming ubiquitous, the problem of designing high performance and reliable wireless networks is of great importance today. Wireless links are characterized by a rapidly varying channel, requiring ...

Vutukuru, Mythili

2010-01-01T23:59:59.000Z

276

www.sea.co.uk a Cohort plc company Lunar Lander Science payload  

E-Print Network (OSTI)

www.sea.co.uk a Cohort plc company Lunar Lander ­ Science payload Capability · Instrument design-European #12;www.sea.co.uk a Cohort plc company Lunar Lander ­ IMU Capability · MEMS IMU Heritage · MEMS gyro

Anand, Mahesh

277

Extreme lunar surface charging during solar energetic particle events J. S. Halekas,1  

E-Print Network (OSTI)

of the lunar surface to potentials on the order of $Ã?100 V or less in the solar wind wake and magnetospheric localized weak crustal magnetic fields, leaving its surface essentially directly exposed to the impact of solar UV and X-rays as well as solar wind plasma and energetic particles. This creates a complex lunar

California at Berkeley, University of

278

Whistler waves observed near lunar crustal magnetic sources J. S. Halekas,1  

E-Print Network (OSTI)

-standing whistler wakes formed by direct solar wind interaction with lunar crustal magnetic fields. Citation such waves on about 6.6% of LP orbits in the solar wind, outside of the lunar wake. About a third of them-standing whistler wakes can be generated by solar wind interaction with electron- scale magnetic obstacles

California at Berkeley, University of

279

GEOCHEMISTRY AND 40 AR GEOCHRONOLOGY OF IMPACT-MELT CLASTS IN LUNAR  

E-Print Network (OSTI)

-melt clasts in lunar meteorites [1, 2]. The dissimilarity of DaG262 and Calcalong Creek impact-melt clasts clasts, melt veins and metal grains. Calcalong Creek [4] is a polymict breccia containing sub-mm clasts of both highlands and mare affinity welded by a glassy, vesicular matrix. It is unusual among lunar

Cohen, Barbara Anne

280

Abstract --A wireless strain sensor system has been designed for human motion detection. The amorphous carbon strain  

E-Print Network (OSTI)

Abstract -- A wireless strain sensor system has been designed for human motion detection sensing technologies, with benefits of miniaturization and low power consumption, have gained dramatic-built sputter system at 150-W power for a period of 8 hours. The chamber pressure was maintained at 35 m

Chiao, Jung-Chih

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281

Energy-efficient wireless communication In this chapter we present an energy-efficient highly adaptive network  

E-Print Network (OSTI)

Energy-efficient wireless communication In this chapter we present an energy-efficient highly substantial research in the hardware aspects of mobile communications energy-efficiency, such as low-power electronics, power-down modes, and energy efficient modulation. However, due to fundamental physical

Havinga, Paul J.M.

282

Energy-aware Cross-layer Burst Buffering for Wireless Communication  

E-Print Network (OSTI)

of the device battery. A big contributor to this energy consumption is the power hungry wireless network interface. We leverage a measurement kit to perform accurate physical energy consumption measure- ments uplink data, from real world traces of Facebook and Skype, with significant energy saving compared

283

Minimum energy decentralized estimation in a wireless sensor network with correlated sensor noises  

Science Journals Connector (OSTI)

Consider the problem of estimating an unknown parameter by a sensor network with a fusion center (FC). Sensor observations are corrupted by additive noises with an arbitrary spatial correlation. Due to bandwidth and energy limitation, each sensor is ... Keywords: decentralized estimation, energy efficiency, power control, wireless sensor networks

Alexey Krasnopeev; Jin-Jun Xiao; Zhi-Quan Luo

2005-09-01T23:59:59.000Z

284

Demo Abstract: Wireless Sensor Network for Substation Monitoring: Design and Deployment  

E-Print Network (OSTI)

Demo Abstract: Wireless Sensor Network for Substation Monitoring: Design and Deployment Asis-Transmissions & Substations 9625 Research Drive Charlotte, NC 28262 {lvanderz,birodriguez} @epri.com Ralph McKosky, Joseph in a substation for monitoring the health of power subsystems such as circuit breakers, trans- formers

Nasipuri, Asis

285

EECS: An Energy Efficient Clustering Scheme in Wireless Sensor , Chengfa Li1  

E-Print Network (OSTI)

' limited power, innovative techniques that im- prove energy efficiency to prolong the network lifetime lifetime greatly with a chain topology. But the delay is signif- icant although the energy is savedEECS: An Energy Efficient Clustering Scheme in Wireless Sensor Networks Mao Ye1 , Chengfa Li1

Wu, Jie

286

Energy-Efficient Protocols for Wireless Networks with Adaptive MIMO Capabilities  

E-Print Network (OSTI)

of a power-aware routing (PAR) scheme that selects minimum-energy end-to-end paths. Our adaptive designs (see Krunz et. al [5] for a survey)1 , some of which are aimed at energy conservation (e.g., Agarwal etEnergy-Efficient Protocols for Wireless Networks with Adaptive MIMO Capabilities Mohammad Z. Siam

Krunz, Marwan M.

287

Low Cost Monitoring and Intruders Detection using Wireless Video Sensor Networks  

E-Print Network (OSTI)

a serious challenge to wireless video sensor networks of weak computation and battery power. In this paper the efficiency of our approach through theoretical analysis and demonstrate the benefits of our scheduling of low capacity (resolution, processing, and storage) of a same or similar type can be deployed

Paris-Sud XI, Université de

288

HIERARCHICAL CENSORING FOR DISTRIBUTED DETECTION IN WIRELESS SENSOR Neal Patwari and Alfred O. Hero III  

E-Print Network (OSTI)

.1. Energy Constraint Energy is of primary concern in wireless sensor networks [4][5][6]. In most will require aggressive energy limitation. Equivalently, given a battery size, minimizing energy consumption maximizes system lifetime. If energy consumption can be sufficiently reduced, solar power or energy

Patwari, Neal

289

Abstract--Although wireless microsensors can add performance-enhancing and energy-saving intelligence to  

E-Print Network (OSTI)

receiver coils, however, capture a small fraction of the magnetic energy available, so coupling factors (k more power. Resonant-based bridges [8] invest energy for this purpose, except conversion efficiencyAbstract--Although wireless microsensors can add performance-enhancing and energy

Rincon-Mora, Gabriel A.

290

A Wideband Body-Enabled Millimeter-Wave Transceiver for Wireless Network-an-Chip  

E-Print Network (OSTI)

A Wideband Body-Enabled Millimeter-Wave Transceiver for Wireless Network-an-Chip Xinmin Yu, Suman-A highly energy-efficient on-chip communication network is crucial for the development of future multi Network-on-Chip (WiNoC) architecture. In order to reduce the power consumption of the transceiver, body

Pande, Partha Pratim

291

Biologically-Inspired Adaptive Data Aggregation for Multi-Modal Wireless Sensor Networks  

E-Print Network (OSTI)

that BiSNET allows sensor nodes to autonomously adapt their duty cycle intervals for power efficiency. Introduction Multi-modal wireless sensor networks (MWSNs) face several challenges1 . The first challenge is autonomy. Since sensor nodes can be deployed in an unattended area (e.g., forest and ocean) or physically

Suzuki, Jun

292

Low-Cost Wireless Sensors for Building Monitoring Applications...  

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

Low-Cost Wireless Sensors for Building Monitoring Applications Low-Cost Wireless Sensors for Building Monitoring Applications Lead Performer: Oak Ridge National Laboratory - Oak...

293

Electromagnetic Interference in Wireless Communications: Behavioral-Level Simulation  

E-Print Network (OSTI)

Electromagnetic Interference in Wireless Communications: Behavioral-Level Simulation Approach in electromagnetic interference (EMI) modeling and simulation for modern and future wireless communication systems

Loyka, Sergey

294

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

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

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

295

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

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

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

296

EM's Laboratory Supports Testing Wireless Technology in Secure...  

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

Laboratory Supports Testing Wireless Technology in Secure Environment EM's Laboratory Supports Testing Wireless Technology in Secure Environment January 29, 2014 - 12:00pm Addthis...

297

Implementation of Campus-wide Wireless Network Services using ATM, Virtual LANs, and Wireless Basestations  

E-Print Network (OSTI)

Implementation of Campus-wide Wireless Network Services using ATM, Virtual LANs, and Wireless of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign 405 North Mathews Ave Urbana, IL 61801 Abstract-A campus-wide wireless LAN has been imple- mented that combines the scalability

Lockwood, John W.

298

Context-for-Wireless: Context-Sensitive Energy-Efficient Wireless Data Transfer  

E-Print Network (OSTI)

Context-for-Wireless: Context-Sensitive Energy-Efficient Wireless Data Transfer Ahmad Rahmati and Lin Zhong Department of Electrical & Computer Engineering Rice University, Houston, TX 77005 {rahmati by choosing wireless interfaces for data transfers based on network condition estimation. We show

Zhong, Lin

299

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

E-Print Network (OSTI)

Wireless Networks: Fundamentals and Applications Karl H. Johansson Electrical Engineering, Royal Institute4/9/2008 1 Closing the Loop over Wireless Networks:Closing the Loop over Wireless Networks: Fundamentals and Applications Karl H. Johansson Electrical Engineering, Royal Institute of Technology Stockholm

Johansson, Karl Henrik

300

Wireless Technologies for Structural Wireless Technologies for Structural Health MonitoringHealth Monitoring  

E-Print Network (OSTI)

Wireless Technologies for Structural Wireless Technologies for Structural Health MonitoringHealth Monitoring Dr. Jerome P. Lynch Department of Civil and Environmental Engineering Department of Electrical of Michigan Slide #2 8/12/2012 · Introduction · Hardware design of wireless sensors: ­ Commercial and academic

Note: This page contains sample records for the topic "lunar wireless power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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301

Content adaptivity in wireless web access  

Science Journals Connector (OSTI)

While the demand for wireless access to web-based systems increases, it becomes apparent that the design of most systems does not support the use of small screen end-devices such as PDAs or mobile phones. However, enabling wireless access should ... Keywords: adaptivity, cohesion preorder, conceptual modelling, content adaptation, internet, media types, mobile clients, mobile communications, proximity values, web-based systems, wireless access

Klaus-Dieter Schewe; Kinshuk; Tiong Goh

2004-09-01T23:59:59.000Z

302

THE PLATFORMS ENABLING WIRELESS  

E-Print Network (OSTI)

require that they be battery powered. They are complemented by a hand- ful of more advanced sensors, in TinyOS [5], a special- ized component model exploits advanced compiler technology to simultaneously through high-level data aggregation, analysis, and storage nodes (see Figure 1). This tiered architecture

Gao, Jie

303

Energy Saving Methods in Wireless Sensor Networks.  

E-Print Network (OSTI)

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

JAWAD ALI, SYED

2008-01-01T23:59:59.000Z

304

Wireless System Considerations When Implementing NERC Critical...  

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

American Electric Reliability Corporation (NERC) Critical Infrastructure Protection (CIP) Standards (CIP-002 through CIP-009). The increased use of wireless technologies and...

305

Wireless Sensors Improve Data Center Efficiency  

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

Case study bulletin describes how to improve data center energy efficiency for wireless sensors, and how to use that information to manage the data center.

306

INL Testing of Wireless Charging Systems  

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

- Paper clips - Soda can - Aluminum foil - Rebar (38") - Coins - Steel toe shoe - CD ROM disk - many more... Milestones Completed : Testing of Evatran's PLUGLESS wireless...

307

TCPL: A Defense against wormhole attacks in wireless sensor networks  

SciTech Connect

Do In this paper presents recent advances in technology have made low-cost, low-power wireless sensors with efficient energy consumption. A network of such nodes can coordinate among themselves for distributed sensing and processing of certain data. For which, we propose an architecture to provide a stateless solution in sensor networks for efficient routing in wireless sensor networks. This type of architecture is known as Tree Cast. We propose a unique method of address allocation, building up multiple disjoint trees which are geographically inter-twined and rooted at the data sink. Using these trees, routing messages to and from the sink node without maintaining any routing state in the sensor nodes is possible. In this paper, we introduce the wormhole attack, a severe attack in ad hoc networks that is particularly challenging to defend against. The wormhole attack is possible even if the attacker has not compromised any hosts and even if all communication provides authenticity and confidentiality. In the wormhole attack, an attacker records packets (or bits) at one location in the network, tunnels them to another location, and retransmits them there into the network. The wormhole attack can form a serious threat in wireless networks, especially against many sensor network routing protocols and location-based wireless security systems. For example, most existing ad hoc network routing protocols, without some mechanism to defend against the wormhole attack, would be unable to find routes longer than one or two hops, severely disrupting communication. We present a new, general mechanism, called packet leashes, for detecting and thus defending against wormhole attacks, and we present a specific protocol, called TIK, that implements leashes.

Kumar, K. E. Naresh [PG Student, Dept of Computer Science and Engineering, KBNCE, Gulbarga, Karnataka (India); Waheed, Mohd. Abdul [Asst. Professor, Dept of Computer Science and Engineering, KBNCE, Gulbarga, Karnataka (India); Basappa, K. Kari [Professor, Dept of E and CE, Dayanand College of Engineering, Banglore, Karnataka (India)

2010-10-26T23:59:59.000Z

308

Analysis of a ConeBased Distributed Topology Control Algorithm for Wireless Multihop Networks  

E-Print Network (OSTI)

[1], network protocols that min­ imize energy consumption are key to the successful usage of wireless in the smallest symmetric graph G# con­ taining all edges (u, v) such that u can communicate with v using power pu is R, i.e. p(R) = P . If every node transmits with power P , then we have an induced graph GR = (V, E

Li, Li Erran

309

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 25, NO. 4, APRIL 2010 981 Power Management of Wideband Code Division  

E-Print Network (OSTI)

of the RFPA for various RF transmit power levels. For example, for data transmission (high load), a WCDMA RFPA (RFPA) is the most power- consuming component in wireless handsets [1], [2]. With increased data rates affected by the RF load impedance and the supply voltage [5], [6]. An RFPA power management architecture

Popovic, Zoya

310

E-Print Network 3.0 - adapting wireless technology Sample Search...  

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

possible. A wireless sensor network normally comes a large area... in wireless sensor networks The rapid progress of wireless communication and embedded micro-sensing MEMS... ....

311

A Study of Energy-efficient Routing Supporting Coordinated Sleep Scheduling in Wireless Ad Hoc Networks.  

E-Print Network (OSTI)

??A wireless ad hoc network is a collection of wireless computing devices that self-configure to form a network independently of any fixed infrastructure. Many wireless… (more)

Lou, Chong

2015-01-01T23:59:59.000Z

312

Lunar occultation observation of ? Sgr: A progress report  

SciTech Connect

Lunar Occultation (LO) is an event where limb of the Moon passing over a particular heavenly bodies such as stars, asteroids, or planets. In other words, during the event, stars, asteroids and planets are occulted by the Moon. When occulted objects contact the lunar limb, there will be a diffraction fringe(s) which can be measured photometrically, until the signal vanishes into noise. This event will give us a valuable information about binarities (of stars) and/or angular diameters estimation (of stars, planets, asteroids) in milliarcsecond resolution, by fitting with theoretical LO pattern. CCDs are common for LO observation because of its fast read out, and recently are developed for sub-meter class telescope. In this paper, our LO observation attempt of ? Sgr and its progress report are presented. The observation was conducted on July 30{sup th}, 2012 at Bosscha Observatory, Indonesia, using 45cm f/12 GOTO telescope combined with ST-9 XE CCD camera and Bessel B filter. We used drift-scan method to obtain light curve of the star as it was disappearing behind Moon's dark limb. Our goal is to detect binarity (or multiplicity) of this particular object.

Jatmiko, A. T. P. [Bosscha Observatory, Institut Teknologi Bandung (Indonesia); Puannandra, G. P.; Hapsari, R. D.; Putri, R. A.; Arifin, Z. M.; Haans, G. K.; Hadiputrawan, I. P. W. [Bosscha Observatory, Institut Teknologi Bandung, Indonesia and Astronomy Study Program, Institut Teknologi Bandung (Indonesia)

2014-03-24T23:59:59.000Z

313

Wireless Sensor Networks for Structural Health Monitoring by Sukun Kim  

E-Print Network (OSTI)

Wireless Sensor Networks (WSN). The project is targeting a deployment on the Golden Gate Bridge. Ambient

California at Berkeley, University of

314

Wireless Network Capacity Management: A Real Options Approach  

E-Print Network (OSTI)

capacity, market price of risk, investment timing option 1 Introduction Wireless networks are now regarded

Forsyth, Peter A.

315

Load Balancing in Wireless Sensor Networks using Kirchhoff's Voltage Law  

E-Print Network (OSTI)

Load Balancing in Wireless Sensor Networks using Kirchhoff's Voltage Law Stavros Toumpis Electrical balancing in wireless networks with a single class of traffic, focusing our attention on an important example, i.e., Wireless Sensor Networks. The analysis is based on the Wireless Minimum Cost Problem

Toumpis, Stavros

316

NPTEL Syllabus Advanced 3G and 4G Wireless Mobile  

E-Print Network (OSTI)

NPTEL Syllabus Advanced 3G and 4G Wireless Mobile Communications - Video course COURSE OUTLINE in this area, will also find this course revealing. The treatment would look at current and upcoming wireless communications technologies for broadband wireless access. COURSE DETAIL Sl. No Topic No. of Lectures 1 Wireless

Jagannatham, Aditya K.

317

Monitoring Energy Consumption In Wireless Sensor Networks  

E-Print Network (OSTI)

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

Turau, Volker

318

a Wireless Sensor Network for Environmental Monitoring  

E-Print Network (OSTI)

transmitters #12;Sample sensors: #12;Sample sensors: PAR: Photosynthetically Active (solar) Radiation sensora Wireless Sensor Network for Environmental Monitoring a Wireless Sensor Network for Environmental technology: a truly self configurable, low-cost, maintenance-free, ad-hoc sensor network (not based on Zig

Gburzynski, Pawel

319

Wireless link design using a patch antenna  

SciTech Connect

A wireless link was designed using a patch antenna. In the process, several different models were tested. Testing proved a patch antenna was a viable solution for building a wireless link within the design specifications. Also, this experimentation provided a basis for future patch antenna design.

Hall, E

2000-08-11T23:59:59.000Z

320

Wireless Sensor Network for Advanced Energy Management Solutions  

SciTech Connect

Eaton has developed an advanced energy management solution that has been deployed to several Industries of the Future (IoF) sites. This demonstrated energy savings and reduced unscheduled downtime through an improved means for performing predictive diagnostics and energy efficiency estimation. Eaton has developed a suite of online, continuous, and inferential algorithms that utilize motor current signature analysis (MCSA) and motor power signature analysis (MPSA) techniques to detect and predict the health condition and energy usage condition of motors and their connect loads. Eaton has also developed a hardware and software platform that provided a means to develop and test these advanced algorithms in the field. Results from lab validation and field trials have demonstrated that the developed advanced algorithms are able to detect motor and load inefficiency and performance degradation. Eaton investigated the performance of Wireless Sensor Networks (WSN) within various industrial facilities to understand concerns about topology and environmental conditions that have precluded broad adoption by the industry to date. A Wireless Link Assessment System (WLAS), was used to validate wireless performance under a variety of conditions. Results demonstrated that wireless networks can provide adequate performance in most facilities when properly specified and deployed. Customers from various IoF expressed interest in applying wireless more broadly for selected applications, but continue to prefer utilizing existing, wired field bus networks for most sensor based applications that will tie into their existing Computerized Motor Maintenance Systems (CMMS). As a result, wireless technology was de-emphasized within the project, and a greater focus placed on energy efficiency/predictive diagnostics. Commercially available wireless networks were only utilized in field test sites to facilitate collection of motor wellness information, and no wireless sensor network products were developed under this project. As an outgrowth of this program, Eaton developed a patented energy-optimizing drive control technology that is complementary to a traditional variable frequency drives (VFD) to enable significant energy savings for motors with variable torque applications, such as fans, pumps, and compressors. This technology provides an estimated energy saving of 2%-10% depending on the loading condition, in addition to the savings obtained from a traditional VFD. The combination of a VFD with the enhanced energy-optimizing controls will provide significant energy savings (10% to 70% depending on the load and duty cycle) for motors that are presently connected with across the line starters. It will also provide a more favorable return on investment (ROI), thus encouraging industries to adopt VFDs for more motors within their facilities. The patented technology is based on nonintrusive algorithms that estimate the instantaneous operating efficiency and motor speed and provide active energy-optimizing control of a motor, using only existing voltage and current sensors. This technology is currently being commercialized by Eaton’s Industrial Controls Division in their next generation motor control products. Due to the common nonintrusive and inferential nature of various algorithms, this same product can also include motor and equipment condition monitoring features, providing the facility owner additional information to improve process uptime and the associated energy savings. Calculations estimated potential energy savings of 261,397GWh/Yr ($15.7B/yr), through retrofitting energy-optimizing VFDs into existing facilities, and incorporating the solution into building equipment sold by original equipment manufacturers (OEMs) and installed by mechanical and electrical contractors. Utilizing MCSA and MPSA for predictive maintenance (PM) of motors and connected equipment reduces process downtime cost and the cost of wasted energy associated with shutting down and restarting the processes. Estimated savings vary depending on the industry segment and equi

Peter J. Theisen; Bin Lu, Charles J. Luebke

2009-09-23T23:59:59.000Z

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


321

ISA Approves Standard for Wireless Automation in Process Control  

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

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

322

Building Technologies Office: Harmonization of Wireless Dimming Lighting  

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

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

323

2294 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 6, NO. 6, JUNE 2007 Wireless Profiled TCP Performance over  

E-Print Network (OSTI)

2294 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 6, NO. 6, JUNE 2007 Wireless Profiled TCP Performance over Integrated Wireless LANs and Cellular Networks Humphrey Rutagemwa, Student Member, IEEE-- An analytical framework for studying the per- formance of Wireless Profiled TCP (WP-TCP) flows over

Shen, Xuemin "Sherman"

324

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. XX, NO. XX, MONTH 2009 1 What is the Right Model for Wireless Channel  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. XX, NO. XX, MONTH 2009 1 What is the Right Model for Wireless Channel Interference? Aravind Iyer, Catherine Rosenberg and Aditya Karnik Abstract--In wireless communications, the desired wireless signal is typically decoded by treating the sum of all the other on- going

Rosenberg, Catherine P.

325

Wireless Fading Channel Models: From Classical to Stochastic Differential Equations  

SciTech Connect

The wireless communications channel constitutes the basic physical link between the transmitter and the receiver antennas. Its modeling has been and continues to be a tantalizing issue, while being one of the most fundamental components based on which transmitters and receivers are designed and optimized. The ultimate performance limits of any communication system are determined by the channel it operates in. Realistic channel models are thus of utmost importance for system design and testing. In addition to exponential power path-loss, wireless channels suffer from stochastic short term fading (STF) due to multipath, and stochastic long term fading (LTF) due to shadowing depending on the geographical area. STF corresponds to severe signal envelope fluctuations, and occurs in densely built-up areas filled with lots of objects like buildings, vehicles, etc. On the other hand, LTF corresponds to less severe mean signal envelope fluctuations, and occurs in sparsely populated or suburban areas. In general, LTF and STF are considered as superimposed and may be treated separately. Ossanna was the pioneer to characterize the statistical properties of the signal received by a mobile user, in terms of interference of incident and reflected waves. His model was better suited for describing fading occurring mainly in suburban areas (LTF environments). It is described by the average power loss due to distance and power loss due to reflection of signals from surfaces, which when measured in dB's give rise to normal distributions, and this implies that the channel attenuation coefficient is log-normally distributed. Furthermore, in mobile communications, the LTF channel models are also characterized by their special correlation characteristics which have been reported. Clarke introduced the first comprehensive scattering model describing STF occurring mainly in urban areas. An easy way to simulate Clarke's model using a computer simulation is described. This model was later expanded to three-dimensions (3D) by Aulin. An indoor STF was introduced. Most of these STF models provide information on the frequency response of the channel, described by the Doppler power spectral density (DPSD). Aulin presented a methodology to find the Doppler power spectrum by computing the Fourier transform of the autocorrelation function of the channel impulse response with respect to time. A different approach, leading to the same Doppler power spectrum relation was presented by Gans. These STF models suggest various distributions for the received signal amplitude such as Rayleigh, Rician, or Nakagami. Models based on autoregressive and moving averages (AR) are proposed. However, these models assume that the channel state is completely observable, which in reality is not the case due to additive noise, and requires long observation intervals. First order Markov models for Raleigh fading have been proposed, and the usefulness of a finite-state Markov channel model is argued. Mobile-to-mobile (or ad hoc) wireless networks comprise nodes that freely and dynamically self-organize into arbitrary and/or temporary network topology without any fixed infrastructure support. They require direct communication between a mobile transmitter and a mobile receiver over a wireless medium. Such mobile-to-mobile communication systems differ from the conventional cellular systems, where one terminal, the base station, is stationary, and only the mobile station is moving. As a consequence, the statistical properties of mobile-to-mobile links are different from cellular ones. Copious ad hoc networking research exists on layers in the open system interconnection (OSI) model above the physical layer. However, neglecting the physical layer while modeling wireless environment is error prone and should be considered more carefully. The experimental results show that the factors at the physical layer not only affect the absolute performance of a protocol, but because their impact on different protocols is nonuniform, it can even change the relative ranking among protocols for the sa

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

2010-01-01T23:59:59.000Z

326

An integrated traverse planner and analysis tool for future lunar surface exploration  

E-Print Network (OSTI)

This thesis discusses the Surface Exploration Traverse Analysis and Navigation Tool (SEXTANT), a system designed to help maximize productivity, scientific return, and safety on future lunar and planetary explorations,. The ...

Johnson, Aaron William

2010-01-01T23:59:59.000Z

327

E-Print Network 3.0 - altair lunar lander Sample Search Results  

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

the Altair lunar lander undocks from... 9,849 lbs5,722 lbs 15,571 lbs 4 ... Source: NASA Ames Research Center, Vision Science and Technology Group Collection: Engineering 2...

328

Lunar floor-fractured craters: Classification, distribution, origin and implications for magmatism and shallow crustal structure  

E-Print Network (OSTI)

Floor-Fractured Craters (FFCs) are a class of lunar craters characterized by anomalously shallow floors cut by radial, concentric, and/or polygonal fractures; additional interior features are moats, ridges, and patches of ...

Jozwiak, Lauren M.

329

PROOF FOR AN ENDOGENOUS COMPONENT IN PERSISTENT SOLAR AND LUNAR RHYTHMICITY IN ORGANISMS  

Science Journals Connector (OSTI)

...COLLEGE, WOODS HOLE, MASSACHUSETTS MARINE BIOLOGICAL LABORATORY, WOODS HOLE, MASSACHUSETTS PROOF FOR AN ENDOGENOUS COMPONENT IN PERSISTENT SOLAR AND LUNAR RHYTHMICITY...UNIVERSITY, WOODS HOLE, MASSACHUSETTS. | Journal Article V...

Frank A. Brown; Jr.; H. Marguerite Webb; Miriam F. Bennett

1955-01-01T23:59:59.000Z

330

Joint inversion of seismic and gravity data for lunar composition and thermal state  

Science Journals Connector (OSTI)

......Long-Period Event Catalog, Final Version, 1969 day 202-1977 day 273, 314 pp., Galveston Geophysics Laboratory Contribution No. 491, University of Texas, Austin. Nakamura Y. , Koyama J.,1982. Seismic Q of the lunar upper mantle......

A. Khan; J. A. D. Connolly; J. Maclennan; K. Mosegaard

2007-01-01T23:59:59.000Z

331

Managing energy and mode transitions in skip entry guidance for lunar return trajectories  

E-Print Network (OSTI)

Skip entry trajectories provide a technique for returning an astronaut crew from the Moon to a continental United States landing site at any time during the lunar month. This approach to atmospheric entry requires that the ...

Miller, Melanie A. (Melanie Ann), S.M. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

332

The Dust Accelerator Facility of the Colorado Center for Lunar Dust and Atmospheric Studies  

SciTech Connect

The NASA Lunar Institute's Colorado Center for Lunar Dust and Atmospheric Studies has recently completed the construction of a new experimental facility to study hypervelocity dust impacts. The installation includes a 3 MV Pelletron, accelerating small particles in the size range of 0.1 to few microns to velocities in the range of 1 to 100 km/s. Here we report the capabilities of our facility, and the results of our first experiments.

Horanyi, M.; Colette, A.; Drake, K.; Gruen, E.; Kempf, S.; Munsat, T.; Robertson, S.; Shu, A.; Sternovsky, Z.; Wang, X. [NASA Lunar Science Institute Colorado Center for Lunar Dust and Atmospheric Studies University of Colorado, Boulder, CO, 80309 (United States)

2011-11-29T23:59:59.000Z

333

Radon-222 Emanation and the High Apparent Lead Isotope Ages in Lunar Dust  

Science Journals Connector (OSTI)

... 232Th decay chains may be a significant mechanism for a partial redistribution of the post-radon lead daughters. Kraner2 suggested that there may be an alpha-emitting radioactive deposit on ... radioactive deposit on the lunar surface as a result of the decay in space of radon isotopes which might diffuse out of lunar surface material. Turkevich3 reported evidence for such ...

J. A. S. ADAMS; PAULO M. BARRETTO; RONALD B. CLARK; JOE S. DUVAL

1971-05-21T23:59:59.000Z

334

A study of the effects of surface loading and reorientation of the lunar surface  

E-Print Network (OSTI)

low near-side maria. The sharp definition of mascon edges indicates that they are near surface mass concentrations which are not isostatically compensated. The age of the lunar basalts (Wasserburg et al. , 1977) implies that the mascons have been...-side maria to form the mascon anomalies. Runcorn also proposed that the present non- hydrostatic second degree harmonic in the lunar figure was produced by a two-cell pattern of solid state convection. Although Runcorn believes that the non...

Dawson, Cheryl Ann

1986-01-01T23:59:59.000Z

335

A review of wireless communications for smart grid  

Science Journals Connector (OSTI)

Abstract Smart grid is envisioned to meet the 21st century energy requirements in a sophisticated manner with real time approach by integrating the latest digital communications and advanced control technologies to the existing power grid. It will connect the global users through energy efficiency and awareness corridor. This paper presents a comprehensive review of Wireless Communications Technologies (WCTs) for implementation of smart grid in a systematic way. Various network attributes like internet protocol (IP) support, power usage, data rate etc. are considered to compare the communications technologies in smart grid context. Techniques suitable for Home Area Networks (HANs) like ZigBee, Bluetooth, Wi-Fi, 6LoWPAN and Z-Wave are discussed and compared in context of consumer concerns and network attributes. A similar approach in context of utilities concerns is adopted for wireless communications techniques for Neighborhood Area Networks (NANs) which include WiMAX and GSM based cellular standards. Smart grid applications, associated network issues and challenges are elaborated at the end.

Anzar Mahmood; Nadeem Javaid; Sohail Razzaq

2015-01-01T23:59:59.000Z

336

Wireless Sensors for Data Centers  

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

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

337

Wireless Sensors for Data Centers  

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

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

338

Chapter 4 - Low tech wireless hacking  

Science Journals Connector (OSTI)

Publisher Summary This chapter presents the reader with a variety of attacks and countermeasures for wireless technologies in the home and office by applying a technical approach to low tech hacking. These attacks fall in five primary categories: denial of service and availability, backdoors and cracks, rogue exploits, default vulnerabilities, and attacks on specific security tools. Wireless is a broad topic, with a variety of implementations throughout the world and in every facet of life. Wireless ploys bestowed range from disrupting municipal Wi-Fi with an antenna attack to bypassing access control systems with simple spoofing attacks. In the great world of wireless hacking, there are even a few low tech hacks that can bypass very specific higher tech security mechanisms. Several ways of bypassing media access control (MAC) filtering, port security, and even some of the newer network access control (NAC)-based controls are also discussed. It does no good to hermetically seal the windows in an organization if the doors are left wide open. But that is precisely what many organizations are doing today when they neglect to secure their wireless communications systems. Organizations habitually overlook the security of their wireless communications because they cannot see it. If they cannot see it, then they presume that no one else can either, and it is safe. However, that presumption cannot be farther from the truth. This chapter is dedicated to thwarting wireless systems of all types, armed with everything from a bobby pin to a yagi antenna. The goal of this chapter is to enable readers to “see” wireless, by explaining how it works, describing different types of devices that share common mediums and functionality, and offering clear explanations of security vulnerabilities using real-world examples. The attacks included are part of the low tech hacking subgenre of wireless assaults.

Jack Wiles; Terry Gudaitis; Jennifer Jabbusch; Russ Rogers; Sean Lowther

2012-01-01T23:59:59.000Z

339

Wireless Sensors Improve Data Center Efficiency  

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

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

340

EM threat analysis for wireless systems.  

SciTech Connect

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

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

2006-06-01T23:59:59.000Z

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


341

Wireless Network Control of Interacting Rydberg Atoms  

Science Journals Connector (OSTI)

We identify a relation between the dynamics of ultracold Rydberg gases in which atoms experience a strong dipole blockade and spontaneous emission, and a stochastic process that models certain wireless random-access networks. We then transfer insights and techniques initially developed for these wireless networks to the realm of Rydberg gases, and explain how the Rydberg gas can be driven into crystal formations using our understanding of wireless networks. Finally, we propose a method to determine Rabi frequencies (laser intensities) such that particles in the Rydberg gas are excited with specified target excitation probabilities, providing control over mixed-state populations.

Jaron Sanders; Rick van Bijnen; Edgar Vredenbregt; Servaas Kokkelmans

2014-04-22T23:59:59.000Z

342

E-Print Network 3.0 - active power flow Sample Search Results  

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

Energy Storage, Conversion and Utilization 8 IEEE INFOCOM 2000 1 Effortlimited Fair (ELF) Scheduling for Wireless Summary: on each flow using a per-flow power factor setting. The...

343

A Bandwidth-Based Power-Aware Routing Protocol with Low Route Discovery Overhead in Mobile Ad hoc Networks  

Science Journals Connector (OSTI)

......protocol, where the power consumed by listening to the transmission of a packet is represented...equipped with the IEEE 802.11b wireless device. Measuring the distance-to-bandwidth...equipped with the IEEE 802.11b wireless device. However, if a specific distance is......

Chuan-Chi Weng; Ching-Wen Chen; Chang-Jung Ku; Shiow-Fen Hwang

2010-09-01T23:59:59.000Z

344

[20:22 2003/9/25 DOWLA-CH12.tex] DOWLA: Handbook of RF and Wireless Technologies Page: 375 375400 TURBO CODES  

E-Print Network (OSTI)

without an FEC code, coded systems can afford to operate with a lower transmit power, transmit over longer[20:22 2003/9/25 DOWLA-CH12.tex] DOWLA: Handbook of RF and Wireless Technologies Page: 375 375 powerful types of forward-error-correcting channel codes. Included is not only a discus- sion

Valenti, Matthew C.

345

Data Dissemination with Ring-Based Index for Wireless Sensor Networks Wensheng Zhang, Guohong Cao and Tom La Porta  

E-Print Network (OSTI)

that the index-based scheme outperforms the external storage-based scheme, the DCS scheme, and the local storage and achieve load balance. 1. Introduction Recent advances in electronic and communication tech- nology have enabled the production of battery powered wireless sensor nodes. These nodes are capable of not only

Zhang, Wensheng

346

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 14, NO. 5, MAY 2004 195 A Novel EER Structure for Reducing Complexity  

E-Print Network (OSTI)

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 14, NO. 5, MAY 2004 195 A Novel EER Structure and restoration (EER) structure using the negative resistance class F power amplifier. Due to the extremely high in saturation mode. This characteristic is applied to the pro- posed EER. Using this technique, a limiter

Nam, Sangwook

347

1612 IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. 27, NO. 9, DECEMBER 2009 Multi-Transceiver Optical Wireless Spherical  

E-Print Network (OSTI)

such as frequent disruption of wireless communication links (intermittent connectivity) and the line-of-sight (LOS@rpi.edu, hellam@ecse.rpi.edu). Mehmet Bilgi and Murat Yuksel are with the University of Nevada - Reno, CSE-to-point links using high- powered lasers and relatively expensive components used in fiber-optical transmission

Yuksel, Murat

348

New and Underutilized Technology: Wireless Temperature Sensors | Department  

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

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

349

Design and Power Management of Energy Harvesting Embedded Systems  

E-Print Network (OSTI)

America Princeton, NJ 08540 vijay@nec-labs.com Pai H. Chou University of California Irvine, CA 92697 factors such as the characteristics of the harvesting transducers, chemistry and capacity of the batteries, Design Keywords Energy harvesting, power management, wireless sensors, solar power 1. INTRODUCTION Energy

Chou, Pai H.

350

Wireless Environment LLC | Open Energy Information  

Open Energy Info (EERE)

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

351

US approves new uses for wireless technology  

Science Journals Connector (OSTI)

In a controversial move, the US Federal Communications Commission (FCC) has approved commercial use of ultrawideband technology, which promises faster and more secure wireless transmissions. UWB, which is currently used for such purposes as determining ...

L. D. Paulson

2002-05-01T23:59:59.000Z

352

Antenna beamforming for infrastructureless wireless networks  

E-Print Network (OSTI)

Our work studies the impact of antenna beamforming on the performance of infrastructureless wireless networks. Based on examination of the beampattern for a uniform circular antenna array (UCAA) utilizing beamforming under ...

Godoy, Elizabeth C

2007-01-01T23:59:59.000Z

353

Virtual infrastructure for wireless ad hoc networks  

E-Print Network (OSTI)

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

Gilbert, Seth, 1976-

2007-01-01T23:59:59.000Z

354

Wireless Control: Opportunities and Challengespp g  

E-Print Network (OSTI)

Industrial control Home Network M i h bi i Surveillance Marine habitat mapping Lindhe & J, 2008 Environmental and reconfiguration · Robustness ­ No cable wear and tear ­ No connector failure Concerns about wireless networking

Johansson, Karl Henrik

355

Efficient Agent Communication in Wireless Environments  

Science Journals Connector (OSTI)

In wireless environments, communication should be tailored to enable an efficient use of scarce and fluctuating data communication resources. In this chapter we consider software agent communication in such en...

Heikki Helin; Mikko Laukkanen

2005-01-01T23:59:59.000Z

356

3D face recognition with wireless transportation  

E-Print Network (OSTI)

In this dissertation, we focus on two related parts of a 3D face recognition system with wireless transportation. In the ?rst part, the core components of the system, namely, the feature extraction and classi?cation component, are introduced...

Zou, Le

2009-05-15T23:59:59.000Z

357

Wireless Relay Communications with Unmanned Aerial Vehicles  

E-Print Network (OSTI)

Pengcheng Zhan, Kai Yu, A. Lee Swindlehurst Abstract In this paper, we investigate a communication system vehicles, wireless relays, handoff algorithms Pengcheng Zhan is with ArrayComm LLC, 2025 Gateway Place

Swindlehurst, A. Lee

358

New and Emerging Energy Efficient Wireless Protocols New and Emerging Energy Efficient Wireless  

E-Print Network (OSTI)

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

Jain, Raj

359

Speech quality in wireless systems  

Science Journals Connector (OSTI)

Modern wireless communication systems require a very sophisticated design from the electrical as well as from the acoustical point of view. Since the maximum of functionality needs to be integrated in designs—getting smaller with every new generation—not much space is left for the acoustical components. In addition such sets typically are used in noisy environments. In order to provide a minimum of speech quality a careful design of the acoustical components as well as of the according electrical components is required. Very often there is a strong interaction between those. The presentation will describe the typical types of signal processing and acoustical designs used in such sets and will give methodologies on how to assess the speech quality relevant parameters of such sets. Measurements for optimizing the acoustical design will be described. In addition system evaluation procedures for nonlinear and time?variant signal processing are discussed.

Hans Wilhelm Gierlich; Winfried Krebber; Frank Kettler

1999-01-01T23:59:59.000Z

360

Federal Energy Management Program: FEMP Technology Brief: Wireless Sensor  

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

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

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


361

Building Technologies Office: Open-Standard Wireless Controllers for Water  

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

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

362

ISA Approves Standard for Wireless Automation in Process Control  

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

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

363

Wireless Policy, Cyber Security, Information Technology Division, ITD  

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

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

364

Radio frequency circuits for wireless receiver front-ends  

E-Print Network (OSTI)

The beginning of the 21st century sees great development and demands on wireless communication technologies. Wireless technologies, either based on a cable replacement or on a networked environment, penetrate our daily life more rapidly than ever...

Xin, Chunyu

2005-11-01T23:59:59.000Z

365

Wireless video applications in 3G and beyond  

Science Journals Connector (OSTI)

This article surveys wireless video applications that have been commercialized recently or are expected to go to market in 3G (and beyond) mobile networks, mainly covering error control technologies in view of "wireless video." We introduce several related ...

M. Etoh; T. Yoshimura

2005-08-01T23:59:59.000Z

366

ENERGY EFFICIENCY AND SECURITY FOR MULTIHOP WIRELESS NETWORKS  

E-Print Network (OSTI)

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

Vaidya, Nitin

367

Comparing wireless flooding protocols using trace-based simulations  

Science Journals Connector (OSTI)

Most wireless multi-hop networks, such as ad hoc...networks and wireless sensor networks, need network-wide broadcasting, which is best done with a flooding protocol. In this article, we use ... test-bed network ...

Martin Jacobsson; Christian Rohner

2013-06-01T23:59:59.000Z

368

An energy efficient RF transceiver for wireless microsensor networks  

E-Print Network (OSTI)

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

Daly, Denis Clarke

2005-01-01T23:59:59.000Z

369

ISA Approves Standard for Wireless Automation in Process Control Applications  

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

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

370

A basis of settlement: Economic foundations of permanent pioneer communities. [Lunar settlement  

SciTech Connect

High transport costs will dominate the pattern of lunar development. During the earliest phases, when lunar facilities consist of a research and resource development complex with staff serving tours of a few months, transport costs will encourage local production of food, fuel, and building materials. Once these capabilities are in place and the number of personnel grows to a few hundred, staff rotation might well dominate transport budgets. At that point it would make economic sense to encourage some members of staff to become permanent residents. By analogy with early British settlement in Australia, a vigorous private sector economy could emerge if the lunar organization provided quasi-export earning through its role as the community's major employer and as the major buyer of locally-produced goods. By providing such a market for goods and services, the lunar organization would not only provide a means whereby permanent residents would support themselves but could also accelerate the process of replacing imported goods with local manufactures, thereby reducing the cost of operations. By analogy with recent Alaskan experience, if the resource development activity started making money from sales to orbital customers, severance taxes and/or royalty payments could also provide means by which a lunar community could support itself.

Jones, E.M.

1988-01-01T23:59:59.000Z

371

First lunar wake passage of ARTEMIS: Discrimination of wake effects and solar wind fluctuations by 3D hybrid simulations  

E-Print Network (OSTI)

First lunar wake passage of ARTEMIS: Discrimination of wake effects and solar wind fluctuations of 3D hybrid simulations. As the solar wind magnetic field was highly dynamic during the passage wind variations or by the lunar wake; therefore, a dynamic real-time simulation of the flyby has been

California at Berkeley, University of

372

Obstacle Avoidance and Safeguarding for a Lunar Rover Reid Simmons, Lars Henriksen, Lonnie Chrisman and Greg Whelan  

E-Print Network (OSTI)

Obstacle Avoidance and Safeguarding for a Lunar Rover Reid Simmons, Lars Henriksen, Lonnie Chrisman 15213 Abstract We are developing techniques for safeguarding the remote operation of lunar rovers and dependably. The idea, which we call "safeguarded teleoperation," [9] is to let the humans guide the rover

Simmons, Reid

373

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

E-Print Network (OSTI)

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

Antonio Capone

2011-01-24T23:59:59.000Z

374

Using Wireless Technology to Reduce Facility Energy Usage  

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

This presentation details the U.S. Department of Energy's TEAM initiative's wireless technologies and their applications.

375

Efficient Hybrid Key Agreement Protocol for Wireless Ad Hoc Networks  

E-Print Network (OSTI)

Efficient Hybrid Key Agreement Protocol for Wireless Ad Hoc Networks Xiang-Yang Li Yu Wang Ophir important aspects in ad-hoc wireless networks. To ensure the security, several cryptography protocols must efficient when applied to wireless ad-hoc networks. In this paper, we propose a key agreement protocol

Wang, Yu

376

Topology Reconstruction and Characterisation of Wireless Ad Hoc Networks  

E-Print Network (OSTI)

Topology Reconstruction and Characterisation of Wireless Ad Hoc Networks Jon Arnold, Nigel Bean.sorell@adelaide.edu.au Abstract-- Wireless ad hoc networks provide a useful commu- nications infrastructure for the mobile Hoc Protocols, 802.11, Monitoring, Template Fitting, NS-2. I. INTRODUCTION Wireless Ad Hoc Networks

Roughan, Matthew

377

Video Pricing for Wireless Networks Patrick Seeling and Martin Reisslein  

E-Print Network (OSTI)

Video Pricing for Wireless Networks Patrick Seeling and Martin Reisslein Dept. of Electrical://trace.eas.asu.edu Abstract-- The development of pricing schemes that account for the specific challenges in streaming video to wireless clients is one of the key requirements for making wireless video services economically viable

Reisslein, Martin

378

Wireless Networks manuscript No. (will be inserted by the editor)  

E-Print Network (OSTI)

by becoming mobile. This is referred to as mHealth [2]. In order to fully exploit the benefits of wireless technologies in telemedicine and mHealth, a new type of wireless network emerges: a wireless on-body network

379

A Comprehensive Overview of Wireless Body Area Networks WBAN  

Science Journals Connector (OSTI)

In recent years, the wireless body area network WBAN has emerged as a new technology for e-healthcare applications. The WBANs promise to revolutionize health monitoring. However, this technology remains in the first stages and much research is underway. ... Keywords: Healthcare, IEEE802.15.6, MAC, Security, Sensors, Wireless Body Area Networks, Wireless Sensors Networks

Nourchene Bradai, Lamia Chaari, Lotfi Kamoun

2011-07-01T23:59:59.000Z

380

Towards Integrated PSEs for Wireless Communications: Experiences with the S  

E-Print Network (OSTI)

¥ Wireless Networking and Communications Group (WNCG) Department of Electrical and Computer EngineeringTowards Integrated PSEs for Wireless Communications: Experiences with the S W and SitePlanner R¦ , Jing Jiang¦ , and William H. Tranter¦ ¢ Wireless Valley Communications, Inc. Austin, TX 78758 £ Google

Ramakrishnan, Naren

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


381

STOCHASTIC CONTROL FOR DISTRIBUTED SYSTEMS WITH APPLICATIONS TO WIRELESS  

E-Print Network (OSTI)

STOCHASTIC CONTROL FOR DISTRIBUTED SYSTEMS WITH APPLICATIONS TO WIRELESS COMMUNICATIONS Minyi Huang Departement of Electrical and Computer Engineering McGill University, Montr´eal June 2003 A Thesis submitted and optimization of distributed stochastic systems motivated by current wireless applications. In wireless

Huang, Minyi

382

Distributed Medium Access Control for Next Generation CDMA Wireless Networks  

E-Print Network (OSTI)

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

Zhuang, Weihua

383

What is the Right Model for Wireless Channel Interference?  

E-Print Network (OSTI)

What is the Right Model for Wireless Channel Interference? Aravind Iyer, Catherine Rosenberg, and the links do not interfere with one another. In contrast, in a wireless network, signal transmissions are intrinsically broadcast, and suffer from mutual interference. In several physical layer technologies, a wireless

Rosenberg, Catherine P.

384

Department of Electrical Engineering Spring 2011 Wireless SleepPhones  

E-Print Network (OSTI)

PENNSTATE Department of Electrical Engineering Spring 2011 Wireless SleepPhones Overview Our sound to the user while they slept, to provide a wireless version. They told us that their current demographic was 50+ year olds and they felt that the wireless version could help them to appeal to younger

Demirel, Melik C.

385

Information Commons Help Desk Internet / Connectivity Wireless Access  

E-Print Network (OSTI)

Information Commons Help Desk Internet / Connectivity » Wireless Access ID #1912 Connecting in the Username and Password fields.5. Info Commons Help Desk - Connecting to the UofT wireless netwo... http://help on this entry Info Commons Help Desk - Connecting to the UofT wireless netwo... http://help

Boonstra, Rudy

386

University of Maryland Baltimore (UMB) Wireless Security Standard  

E-Print Network (OSTI)

on building switch · All Access Points within the building to be contained in wireless VLAN Standard(sUniversity of Maryland Baltimore (UMB) Wireless Security Standard Effective Date: 04/14/03 Purpose This standard establishes a framework for ensuring that wireless networking technologies deployed within

Weber, David J.

387

Wireless Networks for Smart Surveillance: Technologies, Protocol Design and Experiments  

E-Print Network (OSTI)

of companies operating in the field of home automation and advanced security systems. Although most solutions of security. A wireless network for home automation is composed of a number of wireless-embedded sensors propagation. Several examples of Wireless Home Automation Networks (WHAN) have been discussed

Savazzi, Stefano

388

Channel assignment using block design in wireless mesh networks  

Science Journals Connector (OSTI)

With the advantages of both wireless LAN and ad hoc, wireless mesh network (WMN) has its characteristic performance in the following aspects: capacity, speed and coverability. In order to solve channel assignment problems in WMN, connectivity of the ... Keywords: Channel assignment, Connectivity, Interference, Routing, Wireless mesh network

Hejiao Huang; Xiaolu Cao; Xiaohua Jia; Xiaolong Wang

2009-05-01T23:59:59.000Z

389

Optimal Audio Transmission over Error-Prone Wireless Links  

E-Print Network (OSTI)

1 Optimal Audio Transmission over Error-Prone Wireless Links Ala' Khalifeh, Student Member IEEE for transmitting high quality audio sequences over error-prone wireless links. Our framework introduces apparatus and technique to optimally protect a stored audio sequence transmitted over a wireless link while considering

Yousefi'zadeh, Homayoun

390

Power and spectrum efficient communications in wireless ad hoc networks  

E-Print Network (OSTI)

on-cooperation message (AoC) with its own user ID included;requesting node receives the AoC message from a neighbor, it

Qu, Qi

2008-01-01T23:59:59.000Z

391

Wireless power transfer for scaled electronic biomedical implants  

E-Print Network (OSTI)

of (a) standard Si PN solarcell, the cathode metal contactanode Standard Si PN Solarcell (a) Bulk CMOS Photodiode (b)

Theilmann, Paul Thomas

2012-01-01T23:59:59.000Z

392

Wireless power transfer for scaled electronic biomedical implants  

E-Print Network (OSTI)

Vout DC . Positive current represents PCE reducing flow-back146 Figure 4.12: PCE and shunt input resistance versus151 Figure 4.13: PCE versus W Sn and D ratio from analytical

Theilmann, Paul Thomas

2012-01-01T23:59:59.000Z

393

Wireless power transfer for scaled electronic biomedical implants  

E-Print Network (OSTI)

of mobile health or mHealth. A large number of products suchindustries towards mHealth. Another somewhat overlapping

Theilmann, Paul Thomas

2012-01-01T23:59:59.000Z

394

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

E-Print Network (OSTI)

the use of microwaves because of the economic and energy efficiency that can be leveraged by products) and James F. Trimer (NASA) announced the development of a thin-film plastic rectenna using printed

La Rosa, Andres H.

395

Empirical Analysis of Transmission Power Control Algorithms for Wireless  

E-Print Network (OSTI)

#12;Using Sensor Networks for Real World · Industrial applications (e.g. HVAC, building control not filter the nodes of bad link quality. · Packet Reception Rate (PRR) ­ Filter the neighbors based on PRR. ­ Filter the neighbors based on received signal strength. ­ With hardware assistance, it can determine link

California at Berkeley, University of

396

Using Wireless Power Meters to Measure Energy Use of  

E-Print Network (OSTI)

by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Technology Development, Building Energy Use of Miscellaneous and Electronic Devices in Buildings Richard Brown1 , Steven Lanzisera1 , Hoi-third of the primary energy used in U.S. buildings, and their energy use is increasing faster than other end

Culler, David E.

397

Wireless power transfer for scaled electronic biomedical implants  

E-Print Network (OSTI)

in [41]. For example, bio-fuel cells which convert glucoseunfortunately as with the bio-fuel cells energy densities

Theilmann, Paul Thomas

2012-01-01T23:59:59.000Z

398

Energy Harvesting for Self-Powered Wireless Sensors  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . 37 D. CMOS Rectifiers . . . . . . . . . . . . . . . . . . . . . . . 39 1. Standard and Schottky Diode Rectifiers . . . . . . . . 39 2. MOS Diode Rectifiers . . . . . . . . . . . . . . . . . . 41 3. Efficiency Enhancement Techniques.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 9 Extrapolated MSMA output voltage vs. frequency. . . . . . . . . . . 29 10 Greinacher/Cockroft-Walton N-stage inductorless transformer. . . . . 35 11 Different rectifier architectures with: a) diodes, b) NMOS, c) CMOS, d) EVC, e) IVC, f) SVC...

Wardlaw, Jason

2012-02-14T23:59:59.000Z

399

Versatile Low Power Media Access for Wireless Sensor Networks  

E-Print Network (OSTI)

(and often changing) demands. We build an analytical model of B-MAC's operation. By comparing B, latency, and energy consumption. By deploying a real world mon- itoring application with multihop that the media access mechanism sup- port duty cycles of 1% but be flexible enough to efficiently transfer

Culler, David E.

400

A maritime wireless communication primitive power-supplied by GPS  

Science Journals Connector (OSTI)

As global positioning systems (GPS) are becoming ubiquitous GPS signals are populating the space. While such signals have exclusively been used in localization services in the first place we take the first step in turning them to energy sources for maritime communication. Specifically we leverage antennas deployed on ships to harvest energy from such ambient GPS signals which are also fed into encoders to carry information bits. This way maritime communication can be built completely battery-free all day long. Also it it because the communication takes place on the ocean where no interference is introduced except for the original GPS signals to the backscattered GPS signals the design of the transceiver under certain energy budget is simplified. In this paper we show the theoretical promise that the system would work using electromagnetic theories and introduce our prototype which proves the concept in real world settings.

2014-01-01T23:59:59.000Z

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


401

CMOS RF power amplifier design approaches for wireless communications  

E-Print Network (OSTI)

A binary-to-thermometer decoderAtt2 CLK V dec Binary-to-Thermometer Decoder EN to unit andbits are decoded into a thermometer code and used to control

Pornpromlikit, Sataporn

2010-01-01T23:59:59.000Z

402

Power Plant Power Plant  

E-Print Network (OSTI)

Basin Center for Geothermal Energy at University of Nevada, Reno (UNR) 2 Nevada Geodetic LaboratoryStillwater Power Plant Wabuska Power Plant Casa Diablo Power Plant Glass Mountain Geothermal Area Lassen Geothermal Area Coso Hot Springs Power Plants Lake City Geothermal Area Thermo Geothermal Area

Tingley, Joseph V.

403

Scaling self-timed systems powered by mechanical vibration energy harvesting  

Science Journals Connector (OSTI)

Passive energy harvesting from mechanical vibration has wide application in wearable devices and wireless sensors to complement or replace batteries. Energy harvesting efficiency can be increased by eliminating AC/DC conversion. A test chip demonstrating ... Keywords: AC power supply, DRAM, energy harvesting, energy-aware systems, integrated circuits, low-power design, power-on reset, scaling, self-timed

Justin Wenck; Jamie Collier; Jeff Siebert; Rajeevan Amirtharajah

2010-06-01T23:59:59.000Z

404

Wi-fi backscatter: internet connectivity for RF-powered devices  

Science Journals Connector (OSTI)

RF-powered computers are small devices that compute and communicate using only the power that they harvest from RF signals. While existing technologies have harvested power from ambient RF sources (e.g., TV broadcasts), they require a dedicated gateway ... Keywords: backscatter, energy harvesting, internet of things, wireless

Bryce Kellogg, Aaron Parks, Shyamnath Gollakota, Joshua R. Smith, David Wetherall

2014-08-01T23:59:59.000Z

405

Power Factor Reactive Power  

E-Print Network (OSTI)

power: 130 watts Induction motor PSERC Incandescent lights 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0 power: 150 watts #12;Page 4 PSERC Incandescent Lights PSERC Induction motor with no load #12;Page 5 Incandescent Lights #12;Page 7 PSERC Incandescent lights power: Power = 118 V x 1.3 A = 153 W = 0.15 kW = power

406

Dense, low-power sensor network for three-dimensional thermal characterization of large-scale atria spaces  

E-Print Network (OSTI)

We describe the design and implementation of a dense, low-power wireless sensor network for fine-grained three-dimensional thermal characterization of a large open indoor space. To better understand the airflow dynamics ...

Gong, Nan-Wei

407

Microsoft Word - New Cingular Wireless Environmental Clearance Memorandum.doc  

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

September 19, 2011 September 19, 2011 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Christine Kimball Realty Specialist - TERR-3 Proposed Action: Grant New Cingular Wireless' request for use of right-of-way at the Salem Substation. Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.9 Grant or denial of requests for multiple-use of a transmission facility rights-of-way, such as grazing permits and crossing agreements, including electric lines, water lines and drainage culverts. Location: Polk County Salem Substation, 2815 Salem Dallas Highway NW, Salem,Oregon; Township 7S, Range 3W, Section 29. Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to grant a request submitted by New

408

Galactic cosmic-ray-produced thermoluminescence profiles in meteorites, lunar samples and a terrestrial analog  

Science Journals Connector (OSTI)

The long-term radiation shielding properties of common extraterrestrial materials are poorly known, although these materials are the most likely structural elements on airless worlds such as the Moon. We report on radiation dose profiles in meteorites and lunar soil cores using specific minerals as naturally-occuring “dosimeters”. We find that radiation profiles are fairly flat in typical meteoroid bodies (< 85 cm radius) and drop by only about 40% through about 2.5 m of lunar soil. These profiles are produced by primary galactic cosmic rays and the secondary proton cascade but with a significant contribution by secondary neutrons at depths of about 2 m (300 g/cm2).

Paul H. Benoit; Yongheng Chen

1996-01-01T23:59:59.000Z

409

Toward a permanent lunar settlement in the coming decade: the Columbus Project  

SciTech Connect

The motivation for creating a permanent lunar settlement is sketched, and reasons for doing so in the coming decade are put forward. A basic plan to accomplish this is outlined, along technical and programmatic axes. It is concluded that founding a lunar settlement on the five hundredth anniversary of the Columbus landing - a Columbus Project - could be executed as a volunteer-intensive American enterprise requiring roughly six thousand man-years of skilled endeavor and a total Governmental contribution of the order of a half-billion dollars. 8 figs.

Hyde, R.A.; Ishikawa, M.Y.; Wood, L.L.

1985-11-19T23:59:59.000Z

410

Wireless Communication for Controlling Microgrids: Co-simulation and Performance Evaluation  

SciTech Connect

A microgrid with wireless communication links for microgrid control has been designed and developed. The complete simulation model has been developed in MatLab SimuLink with seamless integration of the power subsystem and the communication subsystem. Unlike the conventional co-simulators that usually glue two existing simulators together by creating an interface, which has a steep learning curve, the proposed simulator is a compact single-unit model. Detailed modeling of the power subsystem and communication system is presented as well as the microgrid control architecture and strategies. The impact of different communication system performances on microgrid control has been studied and evaluated in the proposed simulator.

Mao, Rukun [ORNL] [ORNL; Xu, Yan [ORNL] [ORNL; Li, Huijuan [ORNL] [ORNL; Li, Husheng [ORNL] [ORNL

2013-01-01T23:59:59.000Z

411

/sup 10/Be profiles in lunar surface rock 68815  

SciTech Connect

Cosmic ray produced /sup 10/Be (t/sub 1/2/ = 1.6 x 10/sup 6/ years) activities have been measured in fourteen carefully ground samples of lunar surface rock 68815. The /sup 10/Be profiles from 0 to 4 mm are nearly flat for all three surface angles measured and show a very slight increase with depth from the surface to a depth of 1.5 cm. These depth profiles are in contrast to the SCR (solar cosmic ray) produced /sup 26/Al and /sup 53/Mn profiles measured from these same samples. There is no sign of SCR produced /sup 10/Be in this rock. The discrepancy between the data and the Reedy-Arnold theoretical calculation (about 2 dpm /sup 10/Be/kg at the surface) can be explained in two ways: (1) the low energy proton induced cross sections for /sup 10/Be production from oxygen are really lower than those used in the calculations or, (2) compared to the reported fits for /sup 26/Al and /sup 53/Mn, the solar proton spectral shape is actually softer (exponential rigidity parameter Ro less than 100 MV), the omnidirectional flux above 10 MeV is higher (more than 70 protons/cm/sup 2/ s), and the erosion rate is higher (greater than 1.3 mm/My). /sup 10/Be, as a high energy product, is a very useful nuclide for helping to obtain the SCR spectral shape in the past. 23 refs., 3 figs., 1 tab.

Nishiizumi, K.; Imamura, M.; Kohl, C.P.; Nagai, H.; Kobayashi, K.; Yoshida, K.; Yamashita, H.; Reedy, R.C.; Honda, M.; Arnold, J.R.

1987-01-01T23:59:59.000Z

412

Recent advances in nuclear powered electric propulsion for space exploration  

Science Journals Connector (OSTI)

Nuclear and radioisotope powered electric thrusters are being developed as primary in space propulsion systems for potential future robotic and piloted space missions. Possible applications for high-power nuclear electric propulsion include orbit raising and maneuvering of large space platforms, lunar and Mars cargo transport, asteroid rendezvous and sample return, and robotic and piloted planetary missions, while lower power radioisotope electric propulsion could significantly enhance or enable some future robotic deep space science missions. This paper provides an overview of recent US high-power electric thruster research programs, describing the operating principles, challenges, and status of each technology. Mission analysis is presented that compares the benefits and performance of each thruster type for high priority NASA missions. The status of space nuclear power systems for high-power electric propulsion is presented. The paper concludes with a discussion of power and thruster development strategies for future radioisotope electric propulsion systems.

R. Joseph Cassady; Robert H. Frisbee; James H. Gilland; Michael G. Houts; Michael R. LaPointe; Colleen M. Maresse-Reading; Steven R. Oleson; James E. Polk; Derrek Russell; Anita Sengupta

2008-01-01T23:59:59.000Z

413

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

SciTech Connect

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

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

2006-09-12T23:59:59.000Z

414

Consort: NodeConsort: Node--constrainedconstrained Opportunistic Routing in WirelessOpportunistic Routing in Wireless  

E-Print Network (OSTI)

on Mobile Computing, 2003. K. W. Choi, W. S. Jeon, and D. G. Jeong, "Efficient Load-Aware Routing Scheme. Sankar and Z. Liu, "Maximum Lifetime Routing in Wireless Ad- hoc Networks," IEEE INFOCOM'04. P. P. Pham

Xue, Guoliang

415

EXPERIMENTAL EVALUATION OF THE THERMAL PERFORMANCE OF A WATER SHIELD FOR A SURFACE POWER REACTOR  

SciTech Connect

Water based reactor shielding is being investigated for use on initial lunar surface power systems. A water shield may lower overall cost (as compared to development cost for other materials) and simplify operations in the setup and handling. The thermal hydraulic performance of the shield is of significant interest. The mechanism for transferring heat through the shield is natural convection. Natural convection in a 100 kWt lunar surface reactor shield design is evaluated with 2 kW power input to the water in the Water Shield Testbed (WST) at the NASA Marshall Space Flight Center. The experimental data from the WST is used to validate a CFD model. Performance of the water shield on the lunar surface is then predicted with a CFD model anchored to test data. The experiment had a maximum water temperature of 75 C. The CFD model with 1/6-g predicts a maximum water temperature of 88 C with the same heat load and external boundary conditions. This difference in maximum temperature does not greatly affect the structural design of the shield, and demonstrates that it may be possible to use water for a lunar reactor shield.

REID, ROBERT S. [Los Alamos National Laboratory; PEARSON, J. BOSIE [Los Alamos National Laboratory; STEWART, ERIC T. [Los Alamos National Laboratory

2007-01-16T23:59:59.000Z

416

Trace element chemistry of Apollo 14 lunar soil from Fra Mauro  

Science Journals Connector (OSTI)

Analytical data are presented for Apollo 14 fines ( Mauro Formation, possessed high concentrations (100–200 × chondrites) for many elements, prior to the excavation of the mare basins. A correlation may exist between Gd/Eu and Zr/Hf ratios in lunar materials.

S.R. Taylor; Patricia Muir; Maureen Kaye

1971-01-01T23:59:59.000Z

417

Proceedings of the 18th lunar and planetary science conference, G. Ryder (ed.), Cambridge University Press and Lunar and Planetary Institute, Houston, 1988. Proceedings of the 19th lunar and planetary science conference, G. Ryder and V. L. Sharpton (eds), Cambridge University Press and Lunar and Planetary Institute, Houston, 1989  

Science Journals Connector (OSTI)

......1989. Following the Apollo 11 landing on Mare Tranquillitatis in...same year as the first Apollo landing provided great impetus to meteorite...petrology of the Apollo 15 landing site, six on general lunar...on achondrites, and 12 on comets. Finally there are nine pages......

S. K. Runcorn

1991-03-01T23:59:59.000Z

418

Lunar crater rims detection from chang’s orbiter data based on a grid environment  

Science Journals Connector (OSTI)

The surface of the moon is scarred with millions of lunar crater, which are the remains of collisions between an asteroid, comet, or meteorite and the moon with different sizes and shapes. With the launch of Chang’s orbiter, it is available to ...

Shengbo Chen; Xuqing Zhang; Shengye Jin

2009-08-01T23:59:59.000Z

419

NASA/TP-2005-213164 Managing Lunar and Mars Mission  

E-Print Network (OSTI)

NASA/TP-2005-213164 Managing Lunar and Mars Mission Radiation Risks Part I: Cancer Risks, Uncertainties, and Shielding Effectiveness Francis A. Cucinotta NASA Lyndon B. Johnson Space Center Houston Division Houston, Texas July 2005 #12;THE NASA STI PROGRAM OFFICE . . . IN PROFILE Since its founding, NASA

Rathbun, Julie A.

420

Extracting Respirable Particles from Lunar Regolith for Toxicology Studies B. L. Cooper1  

E-Print Network (OSTI)

Center, 2101 NASA Parkway, Houston TX 77058; 3 Planetary Geosciences Institute, University of Tennessee Toxicity Assessment Group (LADTAG) is working to determine the permissible limits for exposure to lunar are not conclusive. Based on experience with industrial minerals such as sandblasting quartz, an exposure of several

Perfect, Ed

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


421

Structure of the lunar wake: Two-dimensional global hybrid simulations  

E-Print Network (OSTI)

wake with these solar wind parameters: the angle qsw between directions of the solar wind velocity vsw and the ambient interplanetary magnetic field (IMF) B qsw = 45° and 90° and vsw = 6vA (where vA denotes solar wind that for given solar wind conditions the downstream region of the lunar wake is dominated by electromagnetic

California at Berkeley, University of

422

Lunar surface charging during solar energetic particle events: Measurement and prediction  

E-Print Network (OSTI)

of relatively cool streaming plasma, while the lunar wake (which forms downstream of the Moon in the solar wind [2] The Moon has a tenuous exosphere and only weak and localized crustal magnetic fields, leaving and more energetic plasma in the plasma sheet and magnetosheath regions. The solar wind consists

California at Berkeley, University of

423

Kinetic instabilities in the lunar wake: ARTEMIS observations J. B. Tao,1  

E-Print Network (OSTI)

and the solar wind drives solar wind plasmas to refill the lunar wake along magnetic field lines. Ions of the Moon is sufficiently low that the motion of the solar wind magnetic field does not induce a significant diamagnetic field. Therefore, unlike solar wind plasmas, the solar wind magnetic field penetrates the Moon

California at Berkeley, University of

424

ARTEMIS, A TWO SPACECRAFT, PLANETARY AND HELIOSPHERIC LUNAR MISSION. V. Angelo-, R. Lillis2  

E-Print Network (OSTI)

@ssl.berkeley.edu; 3 NASA God- dard Space Flight Center, Greenbelt, MD 20771. Introduction: The Acceleration-probe separations how particles are accelerated at reconnection sites and shocks, and how turbulence develops the structure, formation, refilling, and downstream evolution of the lunar wake and explore particle

California at Berkeley, University of

425

Lunar exploration: opening a window into the history and evolution of the inner Solar System  

Science Journals Connector (OSTI)

...Narrow Angle Camera (NAC) view of lunar pits with layered walls found in (a) Mare...doi:10.2138/rmg.2006.60.2 ) 8 Burns, JO , N Duric, GJ Taylor, and SW Johnson...Group LPI contribution no. 1748, 7017 43 Burns, JO , DA Kring, JB Hopkins, S Norris...

2014-01-01T23:59:59.000Z

426

COMBINED ANALYSIS OF THORIUM AND FAST NEUTRON DATA AT THE LUNAR SURFACE  

SciTech Connect

The global distribution of the radioactive elements (U, K, Th) at the lunar surface is an important parameter for an understanding of lunar evolution, because they have provided continuous heat over the lifetime of the Moon. Today, only the thorium distribution is available for the whole lunar surface [1]. Another key parameter that characterize the surface of the Moon is the presence of mare basalts. These basalts are concentrated on the nearside and are represented by materials with high-Fe content, sometimes associated with high-Ti. We demonstrated elsewhere that the fast neutron measurement made by Lunar Prospector is representative of the average soil atomic mass [2]. is primarily dominated by Fe and Ti in basaltic terranes, and therefore the map of the fast neutrons provides a good delineation of mare basalts. We focus here on the correlated variations of thorium abundances and fast neutron fluxes averaged over areas of 360 km in diameter, in an attempt to provide a better understanding of the thorium emplacement on the surface of the Moon.

O. GASNAULT; W. FELDMAN; ET AL

2001-01-01T23:59:59.000Z

427

LUNAR THERr1AL HEASUREt1ENTS IN COtiJUilCTIOfJ HITH PROJECT APOLLO  

E-Print Network (OSTI)

as a consequence of the abort of the Apollo 13 landing. On the Apollo 16 mission, the HFE was successfully emplaced ., 17. 8 19 9 23 10 26 #12;ABSTRACT A number of problems related to the feasibility of measuring lunar

Rathbun, Julie A.

428

Wireless Sensor Networks for the Protection of an Electrical Energy Distribution Infrastructure  

E-Print Network (OSTI)

Wireless Sensor Networks for the Protection of an Electrical Energy Distribution Infrastructure Ant. Keywords: Wireless Sensor Networks, Critical Infrastructure Protection, Electrical Energy Distribution of critical points of failure. Fig. 1. MV/LV electricity distribution infrastructure. The Wireless Sensor

Boyer, Edmond

429

Network-Aware Content Shaping for Energy Efficient Wireless Web Access  

Science Journals Connector (OSTI)

Wireless web access is projected to be a primary driving application for the success of next generation wireless data services. However, enabling efficient wireless web access has several bottlenecks, including v...

Debashis Panigrahi; Sujit Dey…

2002-01-01T23:59:59.000Z

430

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

E-Print Network (OSTI)

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

Abedini, Navid

2012-10-19T23:59:59.000Z

431

Ultra Low Power IEEE 802.15.4/ZIGBEE Compliant Transceiver  

E-Print Network (OSTI)

Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair of Committee, Edgar S?nchez-Sinencio Committee Members, Jos? Silva...) Faisal Abdel-Latif Elseddeek Ali Hussien, B.S., Cairo University, Egypt; M.S., Cairo University, Egypt Chair of Advisory Committee: Dr. Edgar S?nchez-Sinencio Low power wireless communications is the most demanding request among all wireless...

Hussien, Faisal A.

2011-02-22T23:59:59.000Z

432

Broadband Wireless Cognitive Radio-I  

E-Print Network (OSTI)

spectrum usage! #12;CMPE 591 - Broadband Wireless Networks 6 Cognitive Radio "Cognitive Radio" is the key portions of the spectrum is available and detect the presence of licensed users when a user operates in a licensed band. (Spectrum Sensing) 2. Select the best available channel. (Spectrum Decision) 3. Coordinate

Tuðcu, Tuna

433

Graphene-enabled Wireless Communication Networks  

E-Print Network (OSTI)

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

Politècnica de Catalunya, Universitat

434

Software Update Recovery for Wireless Sensor Networks  

E-Print Network (OSTI)

mechanism that uses loss-of- control to provide high-reliability, low energy, software updates, includingSoftware Update Recovery for Wireless Sensor Networks Stephen Brown1 and Cormac J. Sreenan2 1 Laboratory, University College Cork, Ireland Abstract. Updating software over the network is important

Sreenan, Cormac J.

435

Ontological Configuration Management for Wireless Mesh Routers  

E-Print Network (OSTI)

the CIM model and OWL ontology language and implementing XSLT transformations from the originalOntological Configuration Management for Wireless Mesh Routers Iv´an D´iaz , Cristian Popi configuration format to CIM/OWL and back. We thus represent it in a higher level of abstraction, an on

Paris-Sud XI, Université de

436

Energy Cooperation in Energy Harvesting Wireless Communications  

E-Print Network (OSTI)

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

Ulukus, Sennur

437

Iterative Collision Resolution in Wireless Networks  

E-Print Network (OSTI)

ITERATIVE COLLISION RESOLUTION IN WIRELESS NETWORKS An Undergraduate Research Scholars Thesis by KATHERINE CHRISTINE STUCKMAN Submitted to Honors and Undergraduate Research Texas A&M University in partial fulfillment... Networks (April 2013) Katherine Christine Stuckman Department of Electrical and Computer Engineering Texas A&M University Research Advisor: Dr. Krishna Narayanan Department of Electrical and Computer Engineering With the growing...

Stuckman, Katherine Christine

2013-03-29T23:59:59.000Z

438

Distributed A Wireless Sensor Network for  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . . . 11 4.3.1 Transmission Lines . . . . . . . . . . . . . . . . . . . . . . 12 4.3.2 Microstrip LinesOS is used as a software platform, and the Collection Tree Protocol (CTP) currently handles multi-hop routing-wave Monopole Antennas . . . . . . . . . . . . . 13 5 MAC and Routing in Wireless Sensor Networks 14 5.1 Medium

439

Energy Conservation Utilizing Wireless Dimmable Lighting Control  

E-Print Network (OSTI)

Energy Conservation Utilizing Wireless Dimmable Lighting Control in a Shared-Space Office Yao Lighting accounts for 25-30% of energy usage in building electrical systems Energy savings can be generated Energy Efficiency with Personal Lighting Preferences Light level tuning · Generates energy savings

Agogino, Alice M.

440

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 17, NO. 5, SEPTEMBER 2002 669 Adaptive Piezoelectric Energy Harvesting Circuit for  

E-Print Network (OSTI)

benefit from such a supply are a capacitively tuned vibration absorber [1], a foot-powered radio "tag" [2IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 17, NO. 5, SEPTEMBER 2002 669 Adaptive Piezoelectric Energy Harvesting Circuit for Wireless Remote Power Supply Geffrey K. Ottman, Member, IEEE, Heath F

Hofmann, Heath F.

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


441

Improving spectrum sensing and multiuser cooperation in wireless cognitive radio networks.  

E-Print Network (OSTI)

??Nowadays wireless spectrum resource is more and more scarce because most wireless spectrum bands have been allocated to licensed users, however measurements show that many… (more)

Song, Chengqi

2010-01-01T23:59:59.000Z

442

Power-Constrained actuator coordination for agricultural sensor networks  

Science Journals Connector (OSTI)

Upon the ubiquitous sensor network capable of deciding control actions by a sophisticated inference engine, this paper designs an actuator controller which coordinates the actuator operations over the multiple farms. Basically, not beginning tasks as ... Keywords: actuator schedule, demand response, farm group, peak power reduction, wireless sensor network

Junghoon Lee; Gyung-Leen Park; Ho-Young Kwak; Jikwang Han

2012-05-01T23:59:59.000Z

443

POWER-EFFICIENT OFDM WITH REDUCED COMPLEXITY AND FEEDBACK OVERHEAD  

E-Print Network (OSTI)

to the transmitter. Our design exploits the correlation among sub-carriers in order to re- duce feedback overheadPOWER-EFFICIENT OFDM WITH REDUCED COMPLEXITY AND FEEDBACK OVERHEAD Antonio G. Marques Dept. of TSC subscriber lines (DSL), digital audio and video broadcasting (DAB/DVB) standards and wireless local area

Marques, Antonio Garcia

444

The nature of lunar volatiles as revealed by MiniRF observations of the LCROSS impact site  

E-Print Network (OSTI)

shepherding spacecraft, we find that the impactor landed in the ray of a fresh, radarbright, 1 km crater be brought to the Moon by comets and asteroids, be formed through reactions between the lunar soil and solar

Spudis, Paul D.

445

LUNAR SEISMIC PROFILING EXPERIMENT DESIGN VERIFICATION THERMAL PAGI OF  

E-Print Network (OSTI)

Simulator Environment 1/Sth High Explosive Baseplate Temperatures Thermal Battery Temperature H. E Electronics Power Dissipation High Explosive Baseplate Temperatures Subsequent to Thermal Battery Firing Baseplate Temperatures Thermal Battery Skin LSPE Battery Firing Central Electronics Temperatures ATM 11091

Rathbun, Julie A.

446

Murphy et al. Reply to the Comment by Kopeikin on "Gravitomagnetic Influence on Gyroscopes and on the Lunar Orbit"  

E-Print Network (OSTI)

Lunar laser ranging analysis, as regularly performed in the solar system barycentric frame, requires the presence of the gravitomagnetic term in the equation of motion at the strength predicted by general relativity. The same term is responsible for the Lense Thirring effect. Any attempt to modify the strength of the gravitomagnetic interaction would have to do so in a way that does not destroy the fit to lunar ranging data and other observations.

T. W. Murphy Jr.; K. Nordtvedt; S. G. Turyshev

2007-05-03T23:59:59.000Z

447

Doppler effect on target tracking in wireless sensor networks  

Science Journals Connector (OSTI)

This paper presents a new detection algorithm and high speed/accuracy tracker for tracking ground targets in acoustic wireless sensor networks (WSNs). Our detection algorithm naturally accounts for the Doppler effect which is an important consideration for tracking higher-speed targets. This algorithm employs Kalman filtering (KF) with the weighted sensor position centroid being used as the target position measurement. The weighted centroid makes the tracker to be independent of the detection model and changes the tracker to be near optimal, at least within the detection parameters used in this study. Our approach contrasts with previous approaches that employ more sophisticated tracking algorithms with higher computational complexity and use a power law detection model. The power law detection model is valid only for low speed targets and is susceptible to mismatch with detection by the sensors in the field. Our tracking model also enables us to uniquely study various environmental effects on track accuracy, such as the Doppler effect, signal collision, signal delay, and different sampling time. Our WSN tracking model is shown to be highly accurate for a moving target in both linear and accelerated motions. The computing speed is estimated to be 50–100 times faster than the previous more sophisticated methods and track accuracy compares very favorably.

Youngwon Kim An; Seong-Moo Yoo; Changhyuk An; B. Earl Wells

2013-01-01T23:59:59.000Z

448

Microsoft Word - Wireless Automation World for OE FINAL.doc  

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

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

449

Planning Wireless Networks with Demand Uncertainty using Robust ...  

E-Print Network (OSTI)

Abstract An optimal planning of future wireless networks is fundamental to satisfy rising traffic ..... COST 231. Urban micro cell measurements and building data.

2011-03-04T23:59:59.000Z

450

India: a case of fragile wireless service and technology adoption?  

Science Journals Connector (OSTI)

Wireless penetration and the Indian economy have grown significantly over the past few years, but how robust and sustainable is the adoption of wireless services and products? Several papers have discussed India as a wireless service and product market, and sometimes tried to assess quantitative attributes thereof. The present paper aims, looking from a managerial point of view, at the unique underlying evolution processes, bottlenecks and risks. It analyses five traditional adoption models, as well as five other one's, to determine their fit, or not, to the Indian wireless evolution.

L-F. Pau; J. Motiwalla

2008-01-01T23:59:59.000Z

451

Distributed Energy-Saving Algorithms for Wireless Networks.  

E-Print Network (OSTI)

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

Zazo Ruiz, Javier

452

Distributed Energy-Saving Algorithms for Wireless Networks.  

E-Print Network (OSTI)

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

Zazo Ruiz, Javier

2012-01-01T23:59:59.000Z

453

Wireless Sensor Network for Aircraft Health Monitoring Honeywell Labs  

E-Print Network (OSTI)

Wireless Sensor Network for Aircraft Health Monitoring Haowei Bai Honeywell Labs 3660 Technology Drive Minneapolis, MN 55418 haowei.bai@honeywell.com Mohammed Atiquzzaman School of Computer Science

Minnesota, University of

454

Existing PON Infrastructure Supported Hybrid Fiber-Wireless Sensor Networks  

Science Journals Connector (OSTI)

We propose a hybrid fiber wireless sensor network based on the existing PON infrastructure. The feasibility of remote sensing and PON convergence is experimentally proven by...

Yu, Xianbin; Zhao, Ying; Deng, Lei; Pang, Xiaodan; Tafur Monroy, Idelfonso

455

Exploration mission enhancements possible with power beaming. [Space Applications Power Beaming  

SciTech Connect

A key factor in the exploration and development of the space frontier is the availability of energy where and when it is needed. Currently all space satellites and platforms include self-contained power systems that supply the energy necessary to accomplish mission objectives. An alternative approach is to couple advanced high power system with energy beam transmitters and energy receivers to form an infrastructure of a space power utility where a central power system provides power to multiple users. Major space activities, such as low Earth orbit space commercialization and the colonization of the Moon or Mars, would benefit significantly from a central power generation and transmission system. This paper describes the power-beaming concept and system components as applied to space power generation and distribution in support of the Space Exploration Initiative. Beam-power scenarios are discussed including commonality of systems and hardware with cargo transport vehicles, power beaming from orbit to stationary and mobile users on the Lunar and Mars surfaces, and other surface applications. 6 refs.

Bamberger, J.A.; Coomes, E.P. (Pacific Northwest Lab., Richland, WA (USA)); Segna, D.R. (USDOE Richland Operations Office, WA (USA))

1990-10-01T23:59:59.000Z

456

Self-Optimization in Mobile Cellular Networks: Power Control and User Association  

E-Print Network (OSTI)

Self-Optimization in Mobile Cellular Networks: Power Control and User Association Chung Shue Chen develop mathematical and algorith- mic tools for the self-optimization of mobile cellular networks the wireless devices are proposed. We focus on the optimization of transmit power and of user association

Paris-Sud XI, Université de

457

Design of a nuclear reactor system for lunar base applications  

E-Print Network (OSTI)

disadvantages. U02 and Pu02 fuels both have extremely poor ther mal conductivities, about 4 W/m K at 500 C, which would normally limit the maximum linear power in the reactor core to unacceptably low levels. For tunately, the ver y high melting temperatur es... conversion, however, high reactor exit temperatures are both necessary and desirable. The efficiency of the power conversion cycle is directly related to the difference between the high and low temperatur es in the system. Since the heat rejection...

Griffith, Richard Odell

2012-06-07T23:59:59.000Z

458

Wireless boundary monitor system and method  

DOE Patents (OSTI)

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

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

1997-01-01T23:59:59.000Z

459

Wireless Roadside Inspection Field Operations.pub  

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

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

460

MHK Projects/Lunar Energy St David s Peninsula Pembrokeshire South Wales UK  

Open Energy Info (EERE)

Lunar Energy St David s Peninsula Pembrokeshire South Wales UK Lunar Energy St David s Peninsula Pembrokeshire South Wales UK < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":-15.6265,"lon":30.4041,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

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


461

Power-aware node-disjoint multipath source routing with low overhead in MANET  

Science Journals Connector (OSTI)

With the advance of wireless communication technologies, small-size and high-performance computing and communication devices like laptops and personal digital assistants are increasingly used in daily life. After the success of second generation mobile system, more interest was started in wireless communications. This interest had led to two types of the wireless networks such as infrastructure wireless network and infrastructure less wireless network, also called mobile ad hoc network (MANET). The research challenges in MANET are related to the routing, security, reliability, scalability, quality of services, internetworking, power consumption and multimedia applications. All the mobile nodes of MANET operate on the battery power; hence power consumption becomes an important issue in MANET. It proposes a power-aware node-disjoint multipath source routing (PNDMSR) for real-time traffic, which balances the node energy utilisation to increase the network lifetime. It takes the network congestion into account to reduce the routing delay across the network, and increases the reliability of the data packets reaching the destination.

M. Bheemalingaiah; M.M. Naidu; D. Sreenivasa Rao; G. Varaprasad

2009-01-01T23:59:59.000Z

462

An Integrated Framework for Obstacle Mapping with See-Through Capabilities using Laser and Wireless  

E-Print Network (OSTI)

and Wireless Channel Measurements Alejandro Gonzalez-Ruiz, Alireza Ghaffarkhah, Yasamin Mostofi Abstract-through capabilities using laser and wireless channel measurements, which can provide mapping capabilities beyond and mapped based on wireless channel measurements. For the latter, we extend our recently-proposed wireless

Liebling, Michael

463

Secure hybrid routing with micro/macro-mobility handoff mechanisms for urban wireless mesh networks  

Science Journals Connector (OSTI)

Secure and pervasive internet access is the goal of present research in wireless networks realm. Wireless Mesh Network (WMN) is expected to be the most widely used network in the near future to make the anywhere-anytime internet access into ... Keywords: handoff latency, handoff mechanisms, hybrid routing, key management, mobility management, pervasive internet access, security, simulation, urban WMN:, wireless mesh networks, wireless networks

Ramanarayana Kandikattu; Lillykutty Jacob

2008-10-01T23:59:59.000Z

464

Energy Efficiency of Symmetric Key Cryptographic Algorithms in Wireless Sensor Networks  

E-Print Network (OSTI)

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

Heys, Howard

465

Efficient Retransmission Methods in Wireless MAC Protocol for Multicast  

Science Journals Connector (OSTI)

Recent studies on reliable wireless multicast have focused on sending acknowledgement packets from all member stations to the source. Although these studies provide methods of improving the reliability, there have not been any studies on retransmission ... Keywords: MAC, Multicast, Retransmission, Wireless

Sung Won Kim; Byung-Seo Kim; Randy L. Ekl

2012-04-01T23:59:59.000Z

466

ABHINAV MURALI ACES-205,Multimedia Wireless Networks Lab  

E-Print Network (OSTI)

(GSM) networks Linearly Polarized Micro strip Stacked Patch Antenna for GPS · Designed and fabricated a linearlyABHINAV MURALI ACES-205,Multimedia Wireless Networks Lab Department of Electrical Engineering) EXPERIENCE Multimedia Wireless Networks Lab, IIT Kanpur July,2012 - Present Project Associate · Currently

Jagannatham, Aditya K.

467

Periodic Constraint-Based Control Using Dynamic Wireless Sensor Scheduling  

E-Print Network (OSTI)

Periodic Constraint-Based Control Using Dynamic Wireless Sensor Scheduling James Weimer, Jos´e Ara´ujo, Aitor Hernandez and Karl Henrik Johansson Abstract-- Constraint-based control over wireless sensor net- works (WSNs) require control strategies that achieve a desired closed-loop system performance while

Johansson, Karl Henrik

468

1569174510 1 Abstract--Wireless networking technologies permit a great  

E-Print Network (OSTI)

there is more potential for abuse and misuse of these services. In this work we find the uptake of wireless teams in different areas of England and Wales, in the United Kingdom (UK). Index Terms-- Internet, Networks, Security, Wireless LAN I. INTRODUCTION IRELESS (Wi-Fi) Internet access is now commonplace among

Grout, Vic

469

Maintaining Sensor Networks Perpetually Via Wireless Recharging Mobile Vehicles  

E-Print Network (OSTI)

. For example, in a solar harvesting system, statistics has shown that the differences of energy generating@cityu.edu.hk, linxl@mail.sysu.edu.cn Abstract--The emerging wireless energy transfer technology based on magnetic and perpetual energy source to sensors. In this paper we study the use of minimum number of wireless charging

Liang, Weifa

470

ESTR -Energy Saving Token Ring Protocol for Wireless Sensor Networks  

E-Print Network (OSTI)

ESTR - Energy Saving Token Ring Protocol for Wireless Sensor Networks Faruk Bagci, Theo Ungerer a long lifetime of the sensor network and the application it is important to save energy. A sensor node control (MAC) protocol for wireless sensor networks, called Energy Saving Token Ring Protocol (ESTR). ESTR

Ungerer, Theo

471

Energy Attacks and Defense Techniques for Wireless Systems  

E-Print Network (OSTI)

systems, where energy is the most critical constraint to life- time and reliability. We for the first time propose a hardware- based energy attack, namely energy hardware Trojans (HTs), which can be well hidden Security Keywords Wireless security, hardware Trojan, leakage energy 1. INTRODUCTION Wireless communication

Potkonjak, Miodrag

472

Energy Consumption in Coded Queues for Wireless Information Exchange  

E-Print Network (OSTI)

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

Boucherie, Richard J.

473

Energy Harvesting in Wireless Communications Communicating with Energy  

E-Print Network (OSTI)

Energy Harvesting in Wireless Communications Communicating with Energy Harvesting Transmitters Tech, utilizing strain Wireless networking with energy harvesting nodes: · Green, self-sufficient nodes, · Extended network lifetime, · Smaller nodes with smaller batteries, · Very limited and varying energy

Smith, Adam D.

474

Energy Efficiency of Encryption Schemes Applied to Wireless Sensor Networks  

E-Print Network (OSTI)

Energy Efficiency of Encryption Schemes Applied to Wireless Sensor Networks Xueying Zhang, Howard M (ICC 2010), Cape Town, South Africa, May 2010, and "Energy Efficiency of Symmetric Key Cryptographic In this paper, we focus on the energy efficiency of secure communication in wireless sensor networks (WSNs). Our

Heys, Howard

475

An Energy-efficient Wireless Sensor Network for Precision Agriculture  

E-Print Network (OSTI)

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

Kumar, Ratnesh

476

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

E-Print Network (OSTI)

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

Politècnica de Catalunya, Universitat

477

Review: A survey of intrusion detection in wireless network applications  

Science Journals Connector (OSTI)

Information systems are becoming more integrated into our lives. As this integration deepens, the importance of securing these systems increases. Because of lower installation and maintenance costs, many of these systems are largely networked by wireless ... Keywords: Classification, Intrusion detection, Security, Wireless networks

Robert Mitchell, Ing-Ray Chen

2014-04-01T23:59:59.000Z

478

Sustainability of Self-Configuring Wireless Sensor Bozena Kaminska  

E-Print Network (OSTI)

Sustainability of Self-Configuring Wireless Sensor Networks Bozena Kaminska Simon Fraser University monitoring and security. Those applications impose requirements for sustained, reliable, and fault-tolerant operation. We introduce a new ad-hoc wireless architecture in which forwarding is based on associativity

Gburzynski, Pawel

479

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

E-Print Network (OSTI)

is too pessimistic. Most wireless devices can distinguish at least four states: (i) either the wireless, or it is silently listening, usually allowing it to differentiate between the other three states: (ii) the media the listening node can sense that there are transmissions happening, e.g. there is energy on the channel

480

Approximate Minimum-Energy Multicasting in Wireless Ad Hoc Networks  

E-Print Network (OSTI)

and a set of destination nodes, the problem is to build a minimum-energy multicast tree for the requestApproximate Minimum-Energy Multicasting in Wireless Ad Hoc Networks Weifa Liang, Senior Member, IEEE Abstract--A wireless ad hoc network consists of mobile nodes that are equipped with energy

Liang, Weifa

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


481

Wireless Sensor Networks for Monitoring of Large Public Buildings  

E-Print Network (OSTI)

for a communication infrastructure set-up. Using energy-conservation techniques (putting nodes to sleep whenWireless Sensor Networks for Monitoring of Large Public Buildings Murat Demirbas Department potential, monitoring of large public buildings is a significant emerging application area for wireless

Demirbas, Murat

482

Image Fusion for an EOD Robot Wireless Visual Module  

Science Journals Connector (OSTI)

This paper is concerned with the design of a visual module, which employs a novel Principal Components Analysis (PCA) based algorithm to fuse collected multi-focus images. The data transmission is performed using wireless communication. Simulation results ... Keywords: Explosive Ordance Disposal, multi-focus image fusion, robotics, wireless

Hongyuan Jing; Tanya Vladimirova

2013-09-01T23:59:59.000Z

483

Multihop Wireless Networks: What's Wrong With Min Hopcount?  

E-Print Network (OSTI)

is bimodal ­ Links are either "good", or "bad" · All "good" links are equivalent ­ Sufficient condition for success · What about wireless? #12;Indoor Wireless Network 5th floor 6th floor 802.11b radios (fixed tx

484

Utility Maximization for Delay Constrained QoS in Wireless  

E-Print Network (OSTI)

Utility Maximization for Delay Constrained QoS in Wireless I-Hong Hou CSL and Department of CS of utility maxi- mization for clients with delay based QoS requirements in wireless networks. We adopt that the utility of a client is a function of the timely throughput it obtains. We treat the timely throughput

485

Handover Performance of HVAC Duct Based Indoor Wireless Networks  

E-Print Network (OSTI)

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

Stancil, Daniel D.

486

Application Level Energy and Performance Measurements in a Wireless LAN  

E-Print Network (OSTI)

Application Level Energy and Performance Measurements in a Wireless LAN Markus Tauber, Saleem N conclusions about the energy efficiency of transmissions in a WLAN cell. Our measurements have allowed us an experimental evaluation of energy usage and performance in a wireless LAN cell based on a testbed using the 5

Bhatti, Saleem N.

487

Graphene-enabled Wireless Communication for Massive Multicore Architectures  

E-Print Network (OSTI)

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

Cabellos-Aparicio, Albert

488

Secure neighbor discovery in wireless networks: formal investigation of possibility  

Science Journals Connector (OSTI)

Wireless communication enables a broad spectrum of applications, ranging from commodity to tactical systems. Neighbor discovery (ND), that is, determining which devices are within direct radio communication, is a building block of network protocols ... Keywords: relay attack, secure neighbor discovery, wireless networks security

Marcin Poturalski; Panos Papadimitratos; Jean-Pierre Hubaux

2008-03-01T23:59:59.000Z

489

Network Electricity Use Associated with Wireless Personal Digital Assistants  

E-Print Network (OSTI)

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

Kammen, Daniel M.

490

The Energy Cost of Mandatory Bidirectionality in Wireless Multimedia Communication  

E-Print Network (OSTI)

The Energy Cost of Mandatory Bidirectionality in Wireless Multimedia Communication Xiaoyu Chu to have high energy costs in new application do- mains involving multimedia. In this paper, we examine the energy cost of an old, simple and pervasive feature in wireless medium access control protocols

Sethu, Harish

491

Energy-Efficient Localized Routing in Random Multihop Wireless Networks  

E-Print Network (OSTI)

Energy-Efficient Localized Routing in Random Multihop Wireless Networks Yu Wang, Senior Member the energy efficiency of routes in multihop wireless networks. Among them, several geographical localized Localized Energy-Aware Restricted Neighborhood routing (LEARN), which can guarantee the energy efficiency

Wang, Yu

492

Disaster Management Projects Using Wireless Sensor Networks: An Overview  

Science Journals Connector (OSTI)

There are numerous projects dealing with disaster management and emergency response that use wireless sensor networks technologies. Indeed, WSNs offer a good alternative compared to traditional ad hoc networks. Air pollution monitoring, forest fire detection, ... Keywords: Wireless Sensor Networks, Disaster Management, Emergency Response, Information Systems

Imane Benkhelifa, Nadia Nouali-Taboudjemat, Samira Moussaoui

2014-05-01T23:59:59.000Z

493

Modeling mobility and workload for wireless metropolitan area networks  

Science Journals Connector (OSTI)

Research on large-scale wireless metropolitan area networks, which offer broadband capacity while supporting user and terminal mobility suffers from the lack of realistic mobility and workload models. There is a strong need for such models to be able ... Keywords: Metropolitan area radio access networks, Mobile communications, Mobility modeling, Wireless communication networks, Workload modeling

Matthias Hollick; Tronje Krop; Jens Schmitt; Hans-Peter Huth; Ralf Steinmetz

2004-05-01T23:59:59.000Z

494

Small Power Technology for Tetrahedral Rovers  

Science Journals Connector (OSTI)

The Small Power Technology (SPOT) being studied at GSFC has the potential to be an efficient and compact radioisotope based electrical power system. Such a system would provide power for innovative tetrahedral robotic arms and walkers to support the lunar exploration initiative within the next decade. Presently NASA has designated two flight qualified Radioisotope Power Supplies (RPS): the Multi?Mission RTG (MMRTG) which uses thermocouple technology and the more efficient but more massive Stirling RTG (SRTG) which uses a mechanical heat (Stirling) engine technology. With SPOT thermal output from a radioisotope source is converted to electrical power using a combination of shape memory material and piezoelectric crystals. The SPOT combined energy conversion technologies are potentially more efficient than thermocouples and do not require moving parts thus keeping efficiency high with an excellent mass to power ratio. Applications of particular interest are highly modular addressable reconfigurable arrays of tetrahedral structural components designed to be arms or rovers with high mobility in rough terrain. Such prototypes are currently being built at GSFC. Missions requiring long?lived operation in unilluminated environments preclude the use of solar cells as the main power source and must rely on the use of RPS technology. The design concept calls for a small motor and battery assembly for each strut and thus a distributed power system. We estimate based on performance of our current tetrahedral prototypes and power scaling for small motors that such devices require tens of watts of power output per kilogram of power supply. For these reasons SPOT is a good candidate for the ART (addressable Reconfigurable Technology) baseline power system.

P. E. Clark; S. R. Floyd; C. D. Butler; Y. Flom

2006-01-01T23:59:59.000Z

495

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

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

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

496

Harmonization of Wireless Dimming Lighting Control | Department of Energy  

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

Harmonization of Wireless Dimming Lighting Harmonization of Wireless Dimming Lighting Control Harmonization of Wireless Dimming Lighting Control The U.S. Department of Energy (DOE) is currently conducting research into the harmonization of ZigBee, BACnet-or building automation and control network-and DALI-or digital addressable lighting interface-systems in wireless dimming lighting controls. Four proposed modules will enable "plug-and-play" capabilities for all DALI-compatible controls and BACnet-compatible systems. Project Description This project seeks to develop "plug-and-play" capabilities for lighting as an integrated component of a whole-building control system. Verified Energy, LLC, attempts to demonstrate the benefits of implementing wireless control in dimming applications using plug-and-play principles.

498

Estimating the lunar mantle water budget from phosphates: Complications associated with silicate-liquid-immiscibility  

Science Journals Connector (OSTI)

Abstract The discovery of water within the lunar mantle has broad implications for the formation of the Earth–Moon system, differentiation of the Moon, and the magmatic evolution of lunar basalts, as well as the highland rocks. Recently, there has been considerable interest in using combined water abundances and H-isotope systematics of lunar apatites from mare basalts to quantify the origin and extent of water within the Moon’s mantle. However, the petrologic and geochemical conditions that govern apatite crystallization are not well-constrained, especially for high-FeO basaltic melts that crystallize at fO2 values below the iron–wüstite buffer. Apatites are typically located within the late-stage interstitial regions. In this contribution, we present detailed textural descriptions of late-stage inter-cumulus, residual-liquid pockets (i.e., mesostasis pockets), in order to understand the petrogenesis of lunar apatite. Results from five mare basalts demonstrate that the majority of the residual liquids in mesostasis regions have undergone silicate-liquid immiscibility (SLI) splitting into Si–K-rich (felsic) and Fe-rich (Fe-basaltic) conjugate liquids. We demonstrate the complexity of these residual liquids by documenting a wide range of water contents for apatites in several mesostasis pockets within a single mare basalt, a complexity common to many basalts. These data illustrate that individual apatite-hosting mesostasis pockets behave as independent sub-systems, even within a single rock. Furthermore, we present water concentrations for another phosphate phase, merrillite, indicating additional uncertainties during considerations of water partitioning into apatite. Fractional crystallization trends have been used in order to assess the conditions under which magmas are likely to undergo SLI. Predicted liquid lines of descent indicate that it is the late-stage residual liquids of lunar basalts with relatively low-Mg# (e.g., ?50) may not intersect the two-liquid field depending upon the fractionation trends in the late-stage mesostasis pockets. For samples that undergo SLI, the apatite/melt-partition coefficients required for back-calculating water abundances of the parental melts are compromised by the generation of two populations of apatites-merrillites from conjugate immiscible liquids. This process highlights an important complexity inherent to all water back-calculations that use apatite, as this requires an additional set of partition coefficients. We emphasize that the complex petrologic nature and common development of SLI of apatite-bearing, late-stage mesostasis pockets have not been considered in published apatite-volatile data. These factors, in additional to other considerations, illustrate why water back-calculations to model the primary melts from such data must be viewed with caution.

J.F. Pernet-Fisher; G.H. Howarth; Y. Liu; Y. Chen; L.A. Taylor

2014-01-01T23:59:59.000Z

499

Wireless Infrastructure for Performing Monitoring, Diagnostics, and Control HVAC and Other Energy-Using Systems in Small Commercial Buildings  

SciTech Connect

This project focused on developing a low-cost wireless infrastructure for monitoring, diagnosing, and controlling building systems and equipment. End users receive information via the Internet and need only a web browser and Internet connection. The system used wireless communications for: (1) collecting data centrally on site from many wireless sensors installed on building equipment, (2) transmitting control signals to actuators and (3) transmitting data to an offsite network operations center where it is processed and made available to clients on the Web (see Figure 1). Although this wireless infrastructure can be applied to any building system, it was tested on two representative applications: (1) monitoring and diagnostics for packaged rooftop HVAC units used widely on small commercial buildings and (2) continuous diagnosis and control of scheduling errors such as lights and equipment left on during unoccupied hours. This project developed a generic infrastructure for performance monitoring, diagnostics, and control, applicable to a broad range of building systems and equipment, but targeted specifically to small to medium commercial buildings (an underserved market segment). The proposed solution is based on two wireless technologies. The first, wireless telemetry, is used for cell phones and paging and is reliable and widely available. This risk proved to be easily managed during the project. The second technology is on-site wireless communication for acquiring data from sensors and transmitting control signals. The technology must enable communication with many nodes, overcome physical obstructions, operate in environments with other electrical equipment, support operation with on-board power (instead of line power) for some applications, operate at low transmission power in license-free radio bands, and be low cost. We proposed wireless mesh networking to meet these needs. This technology is relatively new and has been applied only in research and tests. This proved to be a major challenge for the project and was ultimately abandoned in favor of a directly wired solution for collecting sensor data at the building. The primary reason for this was the relatively short ranges at which we were able to effectively place the sensor nodes from the central receiving unit. Several different mesh technologies were attempted with similar results. Two hardware devices were created during the original performance period of the project. The first device, the WEB-MC, is a master control unit that has two radios, a CPU, memory, and serves as the central communications device for the WEB-MC System (Currently called the 'BEST Wireless HVAC Maintenance System' as a tentative commercial product name). The WEB-MC communicates with the local mesh network system via one of its antennas. Communication with the mesh network enables the WEB-MC to configure the network, send/receive data from individual motes, and serves as the primary mechanism for collecting sensor data at remote locations. The second antenna enables the WEB-MC to connect to a cellular network ('Long-Haul Communications') to transfer data to and from the NorthWrite Network Operations Center (NOC). A third 'all-in-one' hardware solution was created after the project was extended (Phase 2) and additional resources were provided. The project team leveraged a project funded by the State of Washington to develop a hardware solution that integrated the functionality of the original two devices. The primary reason for this approach was to eliminate the mesh network technical difficulties that severely limited the functionality of the original hardware approach. There were five separate software developments required to deliver the functionality needed for this project. These include the Data Server (or Network Operations Center), Web Application, Diagnostic Software, WEB-MC Embedded Software, Mote Embedded Software. Each of these developments was necessarily dependent on the others. This resulted in a challenging management task - requiring high bandwidth communications among

Patrick O'Neill

2009-06-30T23:59:59.000Z

500

A Taxonomy of Wireless Micro-Sensor Network Models Sameer Tilak Nael B. Abu-Ghazaleh Wendi Heinzelman  

E-Print Network (OSTI)

A Taxonomy of Wireless Micro-Sensor Network Models £ Sameer Tilak Nael B. Abu-Ghazaleh Wendi wireless networks. This paper examines this emerging field to clas- sify wireless micro-sensor networks to classify wireless micro-sensor networks. In partic- ular, we classify the aspects of wireless micro

Han, Richard Y.